JP2000074526A - Modification method of air-cooled ammonia absorption refrigerator and air-cooled ammonia absorption refrigerator - Google Patents

Abstract

(57) [Problem] To improve a combustion system device of an air-cooled ammonia absorption refrigerator so that a liquid fuel can be used instead of a gaseous fuel without significantly increasing the shape and size of the entire refrigerator. Reduce fuel costs. SOLUTION: The injection port of a gun-type kerosene burner 8 is not directed directly to the generator 1 as shown by an arrow D, but to the side of the generator 1 (that is, to the side of the generator). ) Spray a flame. Generally, fuel oil generates a long flame, and the flame is guided by the flame path wall 14 ', and the combustion reaction is terminated while swirling in an L shape. The high-temperature combustion gas flow generated as a result of the combustion flows and heats the heat transfer fins 1a, which are the heat receiving portions of the generator 1, as shown by the arrow e. The large flame 9L having an L-shape does not reach the heat transfer fins 1a, and therefore there is no risk of overheating the heat transfer fins 1a or preventing soot from adhering to the heat transfer fins to hinder heat conduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reducing the energy cost of an air-cooled ammonia absorption refrigerator by converting a driving energy source from gas fuel to liquid fuel.

[0002]

2. Description of the Related Art FIG. 4 is a schematic sectional view showing a conventional example of an air-cooled absorption refrigerator of the type in which ammonia vapor and an aqueous solution thereof are circulated. It is explanatory drawing of a function. The aqueous ammonia solution contained in the generator 1 is heated by a burner 2, which will be described later in detail with reference to FIG. 6, and is separated into an ammonia vapor and an aqueous ammonia solution. The concentration of the aqueous ammonia solution from which the ammonia vapor has been separated becomes low (for convenience of explanation, this is referred to as dilute aqueous ammonia). The ammonia vapor is guided to the condenser 3 and is cooled by the airflow sent by the cooling fan F while flowing through the meandering pipeline acting as a heat exchanger, and condenses by releasing latent heat to form an ammonia liquid. The ammonia liquid liquefied in the condenser 3 is decompressed by the expansion valve and sent to the evaporator 4, where it is vaporized in the coiled pipe acting as a heat exchanger to become ammonia vapor. By the above-mentioned vaporization, latent heat of vaporization is taken away, and the temperature of the vaporized ammonia vapor decreases. on the other hand,
The diluted ammonia water generated by separating the ammonia vapor in the generator 1 is led to the upper part of the absorber 5 via an expansion valve, and is caused to flow down in a shower form from the spray 5s. The ammonia vapor vaporized in the evaporator 4 also
It is led to the absorber 5. The dilute ammonia water falling in the absorber 4 comes into contact with and absorbs the ammonia vapor introduced from the evaporator 4. The absorbed latent heat generated at this time is dissipated into the atmosphere. In this way, the pressure increase in the absorber 5 is prevented, and the ammonia vapor generated in the evaporator 4 is continuously introduced into the absorber 5. The ammonia aqueous solution which has become concentrated by absorbing the ammonia vapor in the absorber 5 accumulates at the bottom of the absorber 5 and is returned to the generator 1 by the solution pump P. The refluxed concentrated aqueous ammonia solution is heated by the burner 2 as described above, and generates ammonia vapor. Thereafter, these operations are repeated to operate the refrigeration cycle.

The generator 1 described above with reference to FIG.
The circulation path formed by sequentially connecting the condenser 3, the coil pipe in the steamer 4, and the absorber 5 forms a closed system, and strict airtightness is maintained. In the closed system, the phase change between ammonia and water is repeated between the gas phase and the liquid phase, and the absorption and release of latent heat are performed accordingly. Brine (antifreeze) is circulated in the evaporator 4 where the latent heat is absorbed by the vaporization of the ammonia vapor, and heat exchange is performed with the low-temperature ammonia vapor flowing in the coil tube. As a result, the brine is cooled to a low temperature. The cooled brine is sucked into the brine pump P ', is pressure-fed as shown by an arrow a, is supplied to a cooling load (for example, a fan coil unit 28), and circulates as shown by an arrow b. The brine that has performed the cooling function in the fan coil unit 28 is guided to the vicinity of the top of the evaporator 4, and the inside of the evaporator 4 is caused to rain. The brine flows down while being in contact with the outer peripheral surface of the coil tube, and is deprived of heat to become low in temperature, thereby restoring the cooling capacity. As described above, the brine is cooled by the evaporator 4 to a low temperature while being circulated by the brine pump P ′, and the fan coil unit performs a cooling action to increase the temperature. The heated brine returns to the evaporator 4. The cooling operation is performed again, and by repeating these operations continuously, a cooling (cooling) function of the cooling object is performed via the fan coil unit 28.

FIG. 5 shows the actual configuration of the components of the conventional air-cooled ammonia absorption refrigerator having the schematic circulation system shown in FIG. 4, particularly the actual configuration of the arrangement of the generator and the burner. FIG. 3 is a cross-sectional view for clarity, in which arrows indicating the direction of circulation of the heat transfer medium are omitted, arrows indicating the direction of flow of air and combustion gas, and arrows indicating the direction of circulation of brine are added. The generator 1 and the condenser 3 shown in FIG.
, The evaporator 4 and the absorber 5 are the components described with reference to FIG. However, in this cross-sectional view, the condenser 3 and the absorber 5 have respective heat exchange coil portions. The whole is covered with a casing 11, and a set of the air-cooled ammonia absorption refrigerator is constituted by the casing 11 as a commercial product distributed on the market. Reference numeral 11b denotes a fan cover for covering the fan F ', and the fan F' has a so-called extrusion ventilation as shown by an arrow a. For this reason, the casing 11
Becomes negative pressure and sucks the atmosphere as indicated by arrow b.
The sucked air flows through the heat exchange coil portions of the condenser 3 and the absorber 5 as shown by the arrow c, cools them, and joins with the delivery air flow (the arrow a) of the fan F '. The generator 1 has a substantially vertical cylindrical shape, and a substantially horizontal heat transfer fin 1a is mounted on the outer periphery thereof. A line burner 6 is provided to face this, and a gaseous fuel such as city gas or liquefied petroleum gas is burned to form a flame 7. In the conventional air-cooled ammonia absorption refrigerator, gaseous fuel is generally used as in this example, and liquid fuel (for example, kerosene) is not used. Next, the reason will be described. FIG. 6 is a diagram schematically illustrating various burners for explaining the length of a gas fuel and a liquid fuel as heat sources in an air-cooled ammonia absorption refrigerator, and FIG. 6 (A) shows one line. (B) is a perspective view of a line burner in which a plurality of the burners are arranged horizontally,
(C) is a front view of a line burner directly facing the generator and vertically arranged, and (D) is a front view of a case where a kerosene burner is directly facing the generator in place of the line burner.

The line burner 6 shown in FIG. 6 (A) has a structure in which small holes are arranged in a tube wall of a tubular member. When supplied (not shown), flames 7 arranged in a line are formed. As shown in FIG. 6 (C), when the line burner 6v is placed in a vertical position and combustion air (arrow d) is supplied in a horizontal direction to form a flame 7, the generated high-temperature combustion gas is converted to the above-mentioned arrow d. Flows in the extending direction of the generator 1 and contacts the substantially horizontal heat transfer fins 1a of the generator 1 to heat it. As will be understood in comparison with the real sectional view of FIG.
When a heat generating surface (vertical heat source) is formed along the vertical surface, it is convenient to heat the generator 1. This heat source portion is covered with the burner cover 11 c of the casing 11.
The overall shape of the refrigerator can be made compact, and the space for installing the refrigerator can be small.

[0006]

FIG. 5 and FIG.
As shown in (C), when a plurality of line burners are vertically arranged to burn gaseous fuel, it is convenient to make the whole apparatus compact. However, gaseous fuel generally has a high unit price per calorie and is uneconomical, so there is a demand to convert to a liquid fuel (for example, kerosene) with a low unit price per calorie. Responding to such demands is not only the economic benefit of one user and one company, but also a high-value technological improvement that meets social demands such as reduction of energy consumption. However, liquid fuel has a higher specific gravity and viscosity than gaseous fuel, and must be sprayed and mixed with air, resulting in a longer flame to be formed. The fact that the flame is long is not necessarily a disadvantage. For example, in steelmaking furnaces and various flame radiators, a long flame formed by burning liquid fuel is effectively used. However, when the generator in the air-cooled ammonia absorption refrigerator is heated, the characteristic of the liquid fuel burner that forms a long flame causes a problem that the overall shape and size of the refrigerator are increased. That is, as shown in FIG. 6 (C), a substantially horizontal heat transfer fin 1a provided on the outer periphery of the generator 1 generates a high-temperature combustion gas flowing in a substantially horizontal direction. When a liquid fuel burner (e.g., kerosene burner 8) is installed in FIG.
The distance from the flame outlet of the kerosene burner 8 to the generator 1 must be increased. If the distance L is too small, the tip of the long flame 9 contacts the heat transfer fin 1a,
Such heat transfer fins 1a are partially overheated locally, or solid heat generated by combustion (so-called soot or the like) is adhered to the heat transfer fins 1a, thereby causing heat transfer.

For this reason, by setting the distance L appropriately, the high-temperature combustion gas flow 10 is transferred to the substantially horizontal heat transfer fins 1a.
Must flow almost horizontally. FIG. 7 is a cross-sectional view illustrating a prototype refrigerator assuming a case where the air-cooled ammonia absorption refrigerator of the conventional example shown in FIG. 5 is modified to be equipped with the kerosene burner 8 shown in FIG. FIG. With such a modification, liquid fuel can be used instead of gaseous fuel, the unit price per calorie is reduced, and the running cost of the air-cooled ammonia absorption refrigerator is reduced. However, as shown in FIG. 7, a flame passage 16 connecting the flame outlet of the kerosene burner 8 and the generator 1 must be provided, and a combustion chamber cover 12b covering the flame passage 16 and the kerosene burner 8 is mounted. Then, the casing 12 becomes extremely large. When the casing 12 is large, the space required for installing the air-cooled ammonia absorption refrigerator becomes large, and the installation is significantly restricted.
As the flame becomes longer, the flame path becomes longer, and the amount of heat conducted through the flame path wall increases, so the inside of the casing of the air-cooled ammonia absorption refrigerator rises, adversely affecting the electronic components for control with low heat resistance. Effect. The present invention has been made in view of the above circumstances, and provides a technique for modifying an air-cooled ammonia absorption refrigerator designed and manufactured to use a gaseous fuel to enable the use of a liquid fuel. The purpose is to: However, the meaning of the above-mentioned “remodeling” is wide-ranging, and the existing air-cooled ammonia absorption chiller that has a history of operation is modified by mechanical processing, or the existing non-operating (excluding trial operation) ) Not only when remodeling a new air-cooled ammonia absorption refrigerator by adding mechanical processing,
For a semi-finished product air-cooled ammonia absorption refrigerator that does not yet have a combustion device installed, this includes the case where a separately designed and manufactured combustion device is installed. The purpose of the present invention is to design and manufacture a liquid-fuel air-cooled ammonia absorption refrigerator with a new technology related to the combustion of liquid fuel, based on the technical accumulation of design and production. is there.

[0008]

The basic principle of the present invention created to achieve the above object will be briefly described below with reference to FIG. 1 corresponding to one embodiment. That is, in order to reduce the fuel cost by modifying the combustion system equipment of the air-cooled ammonia absorption refrigerator so that the liquid fuel can be used instead of the gaseous fuel without significantly increasing the size and size of the whole refrigerator. Instead of directing the injection port of the gun type kerosene burner 8 directly to the generator 1 as shown by the arrow D, the flame is directed to the side of the generator 1 (that is, to the side of the generator). Inject. In general, fuel oil generates a long flame, which is guided by the flame path wall 14 'of the flame and ends the combustion reaction while turning in an L-shape. The high-temperature combustion gas flow generated as a result of the combustion flows and heats the heat transfer fins 1a, which are the heat receiving portions of the generator 1, as shown by the arrow e. The L-shaped long flame 9L does not reach the heat transfer fin 1a,
Therefore, there is no risk of overheating the heat transfer fins 1a or preventing heat conduction by attaching soot to the heat transfer fins 1a. In the present invention, the term “flame path” is a term that refers to a portion between a burner and a heat transfer fin in “a continuous body of a combustion chamber and a high-temperature combustion product gas flow path”.

[0009] Based on the principle described above, claim 1
The method of modifying the air-cooled ammonia absorption refrigerator according to the present invention comprises a generator for heating an aqueous solution of ammonia to generate ammonia vapor, a substantially horizontal heat transfer fin provided on the outer periphery of the generator, and the heat transfer fin. A burner that generates a high-temperature combustion gas that flows while contacting with, a condenser that liquefies the ammonia vapor generated by the generator, and an evaporator that cools the brine by vaporizing the condensed ammonia liquid, And, in a method of modifying an air-cooled ammonia absorption refrigerator in which the burner burns a gaseous fuel so that a liquid fuel can be used, a method of removing the burner in a manner in which the gaseous fuel is burned, A fuel oil burner of the gun type is mounted, and the flame outlet of the gun type fuel oil burner is directed to the side of the generator without being directly opposed to the generator. The flame squirted from the gun-type fuel oil burner or the high-temperature combustion gas flow generated by combustion is swirled at a substantially right angle in a direction approaching the generator, thereby generating a fuel oil fuel flame. Without contacting the heat transfer fins, the high-temperature combustion product gas flow after combustion is caused to flow substantially horizontally along the heat transfer fins. According to the above-described method of the present invention, a high-temperature combustion product gas stream generated by burning gaseous fuel is brought into contact with the heat transfer fins of the generator to heat the generator, thereby converting the ammonia aqueous solution. By modifying the air-cooled ammonia absorption refrigerator that generates ammonia vapor, without significantly increasing the overall shape and dimensions of the refrigerator.
The gaseous fuel can be converted to a liquid fuel to save energy costs and, consequently, the running cost of the air-cooled ammonia absorption refrigerator. In general, when liquid fuel is burned with a gun type fuel oil burner,
Since stable combustion can be performed by a relatively simple and inexpensive combustion device and automatic control of the amount of generated heat is easy, the air-cooled ammonia absorption refrigerator according to the present invention uses this gun type fuel oil burner. By adopting this, the advantages of the gun type fuel oil burner are exhibited. However, since this gun-type fuel oil burner has the property of generating a long flame, simply applying it to the combustion system of an air-cooled ammonia absorption refrigerator will increase the shape and dimensions of the entire refrigerator. With the negative effect of doing so.
Here, the method of modifying the air-cooled ammonia absorption refrigerator according to the present invention injects a flame toward the side (side) of the generator without directly facing the flame outlet for injecting a long flame to the generator. So that the flame does not directly contact the heat transfer fins of the generator. For this reason, there is no fear that a part of the heat transfer fins is locally heated or soot adheres to the heat transfer fins and hinders heat conduction. As described above, the harm caused by the flame contacting the heat transfer fins is prevented, and the hot combustion gas generated by the combustion reaction flows while flowing almost horizontally along the heat transfer fins. Since the generator is heated by conduction, excellent thermal efficiency is obtained and energy costs are further reduced.

According to a second aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, the flame-type jet outlet of the gun type fuel oil burner and the heat transfer fins of the generator are provided. In addition, a flame path whose horizontal projection plane shape is roughly L-shaped is provided to guide the flame ejected from the flame outlet, and the liquid fuel sprayed from the fuel oil burner and the combustion air are mixed. The combustion reaction is terminated before the mixed stream reaches the heat transfer fins, so that the flame does not contact the heat transfer fins. According to the above-described method of the second aspect of the present invention, since the horizontal projected shape of the flame path is generally L-shaped, the flame guided to this flame path has a generally L-shaped trajectory. Go to the generator while drawing and turning. For this reason, the flow path is longer than when the flame ejected from the fuel oil burner is blown to the generator via a straight course. Therefore, it is easy to terminate the combustion reaction before contacting the generator (that is, to terminate the formation of the flame). In addition, the shape of the flame is generally in the secondary combustion zone (the area closer to the tip of the flame where the combustion reaction with the secondary air takes place) than near the flame outlet.
Becomes thicker. For this reason, it is desirable that the flame path does not significantly interfere with the above-mentioned “natural shape of the flame”. In this respect, in the configuration of the second aspect, the plane projection shape of the flame path is regulated so as to form an L shape, but the front view shape (elevated plane projection shape) is not regulated. large. In particular, it is desirable that the combustion product gas comes into contact with each of the plurality of heat transfer fins under as uniform conditions as possible (temperature, flow rate, pressure, density, etc.). The height dimension of the heat transfer fin arrangement area of the generator "should desirably substantially match. According to the constitutional requirements of the second aspect, as described above, there is no problem in configuring the flame passage so as to obtain the flame passage height corresponding to the “height of the heat transfer fins”.

According to a third aspect of the present invention, in addition to the constituent features of the second aspect of the invention, there is provided a flammable gas stream which is injected from a flame outlet of the fuel oil burner to form a flame, And / or controlling the flow direction and the gas flow density of the gas flow and the gas flow velocity by disposing a flow straightening plate in the high-temperature combustion gas flow generated by the combustible gas flow, It is characterized by suppressing the non-uniformity of the temperature distribution of the gas flow contacting the heat transfer fins of the generator and suppressing the generation of harmful vortices in the gas flow path. According to the third aspect of the invention described above, it is possible to prevent the generation of harmful vortices as well as to prevent the generation of harmful vortices in turning the flow direction of the flame or the combustion gas stream substantially at right angles by applying the invention method of the first aspect. By uniformly heating the heat receiving portion of the vessel, the generation of ammonia vapor can be smoothed. That is, the flammable gas stream and the combustion product gas stream forming the injected flame do not swirl in the horizontal plane unless some external force is applied, because they have inertia themselves. Therefore, in the present invention, the gas flow is guided to the L-shaped flame path, and the plane of the flow trajectory is turned substantially at right angles so as to roughly make the plane L-shaped.
Restriction of the gas flow path profile by the flame path alone does not guarantee that the interior of the gas stream is kept in a rectified state. Furthermore, if the planar shape of the gas flow is restricted only by the above-mentioned flame path, when considering the vertical shape of the gas flow, uniform contact with the heat receiving portion (heat transfer fin) of the generator is obtained. Is not guaranteed. From this point of view, the third aspect of the present invention has the effect of preventing the generation of harmful eddy currents by providing the rectifying plate and controlling the vertical temperature distribution in the gas flow to make the temperature distribution uniform. The flame injected in the horizontal direction becomes lighter due to the expansion caused by the high temperature, and flows upward by inertia in the horizontal direction and bends upward due to buoyancy. According to the third aspect of the present invention, the vertical distribution of the temperature in the combustion product gas flow is made uniform by controlling the induction of the flame by the flow straightening plate without opposing the upward bending of the flame. Can be more uniformly heated.

According to a fourth aspect of the present invention, in addition to the constituent features of the second or third aspect of the present invention, the flame path is made of a refractory material, and the flame path is made of the refractory material. By providing a heat shield cover made of a metal plate covering at least a part of the flame path wall, and allowing cooling air to flow between the refractory wall of the flame path and the heat shield cover, The wall of the flame passage is cooled by air flowing in contact with the outer peripheral surface of the wall, and radiant heat radiated from the outer peripheral surface of the wall of the flame passage is blocked by the heat shield cover. According to the method of the present invention described above, it is possible to effectively prevent adverse effects due to heat conducted from a flame and radiated heat. When a combustion system device is provided in a large number of devices housed in one casing, surrounding the combustion system device with a heat insulating structure is only a publicly-known and public technical common sense. However, the heat insulating structure according to the present claim has a technical significance that goes beyond mere technical common sense. That is,
As a basic configuration of the present invention, the burner for gaseous fuel in the prior art is changed to a burner for liquid fuel, so that it is difficult to avoid a long flame. According to the first to third aspects of the present invention, the long flame is improved so as not to contact the heat transfer fins of the generator. However, the long flame is not shortened, and the flame is still long. is there.
Therefore, the amount of heat radiated from the flame to the periphery is larger than the amount of heat generated by the flame. If the heat radiated from the combustion system is trapped in the casing of the refrigerator, the temperature may exceed the allowable temperature of the electronic device installed in the casing. Therefore, it is necessary to develop an effective heat insulation technique, particularly, a heat insulation method suitable for insulating the outer peripheral surface of the flame path wall for leading a long flame. From this point of view, in the present invention, the flame path wall is covered with a heat shield cover, and the heat conducted through the flame path wall is air-cooled, and the radiant heat radiated from the flame path wall is blocked by the heat shield cover. I do. In this way, each of the conduction heat and the radiant heat is effectively insulated by the heat shield cover, which is a single component, to suppress the temperature rise in the cover internal space of the air-cooled ammonia absorption refrigerator, The practical value of protecting inferior components is very large. Further, if this heat insulating effect is viewed from another aspect, it contributes to making the whole air-cooled ammonia absorption refrigerator compact.

According to a fifth aspect of the present invention, in addition to the constituent features of the fourth aspect of the present invention, air communicating with the atmosphere is provided near the lower end of the heat shield cover covering the flame path wall. In addition to providing an inlet, a chimney communicating with the vicinity of the upper end of the heat shield cover is provided, and a cooling airflow is generated by natural convection between the flame path wall and the heat shield cover. I do. According to the method of the fifth aspect described above, a cooling airflow is generated by natural convection without the necessity of a ventilation fan or a driving motor, so that the airflow from the inner peripheral surface to the outer peripheral surface of the flame path wall can be reduced. The heat conducted to the surface is cooled by air, and the heated air can be released to the upper space of the air-cooled ammonia absorption refrigerator. Since no fan motor is required, power for ventilation cooling is not consumed.
Therefore, the thermal efficiency of the whole air-cooled ammonia absorption refrigerator is not hindered. In addition, the entire refrigerator can be made compact as there is no need to install a fan, and the cost of remodeling can be reduced. Further, since there is no need for an electrical member for supplying power to the fan motor, the air-cooled ammonia absorption can be performed. It does not complicate the wiring system and security equipment of the entire refrigerator. Further, since there is no need to provide a fan motor, there is no possibility of generating vibration or noise due to the fan motor, and for example, consideration should be given to preventing the resonance of the casing of the refrigerator with the fan motor. Make it unnecessary.

According to a sixth aspect of the present invention, in addition to the constituent features of the fourth or fifth aspect of the present invention, a metal tubular member is formed along the heat shield cover made of a metal plate. The water jacket is formed by arranging or forming the heat shield cover with a double plate, and the cooling water is circulated through the metal pipe or the water jacket, and the hot water or hot water which has a cooling effect and is heated is heated. Is supplied for hot water supply. According to the method of the present invention described above, the heat shield cover can be used not only as a mere guide member for cooling air and a reflecting member for radiant heat, but also as a heat insulating and hot water source. That is, the ventilation for cooling gradually increases the temperature while performing the cooling function, and loses the cooling function. Here, according to the configuration of the sixth aspect, the heat shield cover receives the contact heat “cooled air that has been heated” and receives conduction heat from the cooling air.
The received heat is given to the cooling water. For this reason, the temperature of the cooling air having the increased temperature is lowered again to restore the function of cooling the flame path wall. In the above description, for the sake of convenience of explanation, the function and effect according to the sixth aspect are defined as the temperature rise of the cooling air (decrease in cooling capacity) and the temperature decrease of the cooling air (recovery of cooling capacity).
Although the description has been made in terms of the steps, the steps are actually performed not stepwise but continuously. As a result, "the cooling air that has cooled the flame path wall is cooled by the cooling water through the heat shield cover on the other hand, so that the cooling air flows while maintaining the cooling function by suppressing the temperature rise, and flows. The effect of "cooling" is obtained. Further, since the heat received by the heat shield from the cooling air is carried away by the cooling water flow, the cooling water flowing through the metal tube attached to the heat shield or the water jacket formed by the heat shield is heated and rises. Warm,
It flows out as warm or hot water. Therefore, the hot or hot water can be used as a heat source for hot water supply. The hot water supply in this case is broadly defined. For example, when the pipe configuration of the air-cooled ammonia absorption refrigerator includes a reversible switching means so that a heating action can be performed in winter, the above-described shielding is required. Hot water or hot water flowing out of the heat cover can be used as a heat source for heating assistance, and such a use method is also included in the technical scope of the present invention.

According to a seventh aspect of the present invention, there is provided a generator for heating an aqueous solution of ammonia to generate ammonia vapor, a substantially horizontal heat transfer fin provided on the outer periphery of the generator, and the heat transfer fin. A burner that generates a high-temperature combustion gas that flows while contacting the fuel cell, a condenser that liquefies ammonia vapor generated by the generator, and an evaporator that cools the brine by vaporizing the condensed ammonia liquid. In the air-cooled ammonia absorption refrigerator, the burner is a gun-type fuel oil burner, and the flame outlet of the gun-type fuel oil burner is not directed to the generator. It is installed so as to blow out the flame almost horizontally toward the side of the vessel, the burned-out flame terminates the combustion reaction without reaching the heat transfer fins of the generator, and High-temperature combustion gas generated by the combustion reaction, characterized in that it is a structure in contact with the heat transfer fins with substantially horizontally flow. According to the invention of claim 7 described above, a liquid fuel that is cheaper than a gaseous fuel is used as a heat source of the air-cooled ammonia absorption refrigerator, and the heat transfer fins of the generator, which is the heated part, are burned out.
The heat transfer fins are free from the risk of heat generation being hindered by the adhesion of solids produced by combustion (such as soot), and furthermore, the overall configuration of the air-cooled ammonia absorption refrigerator is made compact. Can be. That is, the air-cooled ammonia absorption refrigerator requires some means for heating the generator. As a heat source of this heating means, there are electric power, gaseous fuel, and liquid fuel, each having a length. Among them, the liquid fuel does not violate social demands for leveling the electric power load, and has a low energy cost per calorie. Since the air-cooled ammonia absorption refrigerator according to the seventh aspect is provided with the gun-type fuel oil burner, the advantages of using the liquid fuel described above can be exhibited, and further, no power receiving equipment is required. The specific advantages of not requiring a power receiving facility are as follows.
That is, when the air-cooled ammonia absorption refrigerator is newly installed, the power receiving equipment does not need to be installed, so that the installation space of the power receiving equipment is not required and the installation cost of the power receiving equipment is reduced. In addition, if the existing air-cooled ammonia absorption refrigerator of the electric power heating system is improved to the liquid fuel heating system according to the present invention, the capacity of the existing power receiving equipment will have a margin, and for example, the power consumption for office OA can be generated. . As described above, although it is possible to use the liquid fuel as the heat source of the air-cooled ammonia absorption refrigerator, there is a great advantage.
On the other hand, there is a characteristic that a long flame is generated as compared with gas fuel. If the flame becomes too long, the burner must be separated from the heat transfer fins, and the flame will touch the heat transfer fins and cause adverse effects (overheating of the heat transfer fins, soot adhering to the heat transfer fins and hindering heat transfer). . When the burner is separated from the heat transfer fins, the shape and dimensions of the air-cooled ammonia absorption refrigerator become large.
Under these circumstances, the invention of claim 7 injects the flame toward the generator without directing the flame outlet of the fuel oil burner to the generator, so that the flame is transferred to the heat transfer fins of the generator. And the shape and dimensions of the entire air-cooled ammonia absorption refrigerator are not significantly increased.

According to an eighth aspect of the present invention, in addition to the constituent features of the seventh aspect of the present invention, a refractory material made of a refractory material is provided between the flame outlet of the fuel oil burner and the heat transfer fin of the generator. A flame path comprising a flame path wall is provided, and the flame path formed by the flame path wall has a generally L-shaped projection on a horizontal plane. The flame is injected from the fuel oil burner to generate a flame. The gas flow of the flammable gas to be formed and the gas flow of the combustion product gas after the flammable gas has finished forming a flame are guided to the flame path wall and swirl in a substantially L-shape. And According to the apparatus of the eighth aspect described above, the flame injected from the fuel oil burner is guided to the flame path made of a refractory material. Since the plane projection shape of the above-mentioned flame path is substantially L-shaped, the flame and the high-temperature combustion gas flow guided thereby are forced to swirl in an L-shaped trajectory. However, the flame path is L-shaped because of its planar projection shape, and the elevation projection shape is not restricted. For this reason, the horizontal component of the flow velocity vector of the flame or combustion gas changes its direction into an L-shape, but it naturally diffuses in the vertical direction and also reduces the buoyancy of the atmosphere (because it is expanded at a high temperature and light). It cannot be prevented from receiving and bending upward. In this way, the heat receiving portion of the generator (having the heat transfer fins having a height direction) can be obtained without impeding the effect of claim 7 that "the overall shape and dimensions are not significantly increased". Area) is uniformly contacted. Since the said flame path covers from the flame outlet of the fuel oil burner to the generator, the total flow rate of the combustion gas generated by the injected flame is effectively reduced without any other leakage. Guided to the generator, the efficiency of the air-cooled ammonia absorption refrigerator is high and economical, as well as `` the leaked high temperature gas raises the temperature inside the casing of the air-cooled ammonia absorption refrigerator, Components that have poor heat resistance, such as installed control electronics, may suffer thermal damage, resulting in a loss of cooling function or an uncontrolled state. " No, high operation reliability.

According to a ninth aspect of the present invention, in addition to the constituent features of the eighth aspect of the present invention, the flame and / or flame injected from the burner is located in a space surrounded by the flame path wall. Alternatively, a flow straightening plate made of a refractory material for guiding a flow of combustion product gas is provided. According to the ninth aspect of the present invention described above, the flame and / or combustion product gas forcedly swirled by the L-shaped flame path according to the eighth aspect flows smoothly, and the generator has The entire heat receiving section (the heat transfer fin arrangement area) can be uniformly heated. That is, since the flame injected substantially horizontally is not injected into the vacuum but into the air, the flame collides with the air and is diffused. That is, the tip of the visible flame is thicker than the root. In addition, since the flame is hot and is thermally expanded and lightened, it moves horizontally by inertia and bends upward due to the buoyancy of the atmosphere. In addition, if the flow of the flame or the combustion product gas is forced to bend in a horizontal plane by the L-shaped flame path according to claim 8, the flame or the combustion product gas receives a considerably complicated force. In addition, since the generator as the heat receiving portion has a dimension in the height direction, and the portion having this height must be uniformly heated, the generated flame and the generated high-temperature gas flow must be released. Instead, it is desirable to control the flow so as to obtain a desired state. According to the configuration of the ninth aspect, the gas flow is controlled by the simple stationary member, the generation of the vortex is prevented, the operation of the air-cooled ammonia absorption refrigerator is stabilized, and the combustion product gas to which the heat transfer fin is in contact is provided. The temperature distribution of the stream can be made uniform.

According to a tenth aspect of the present invention, in addition to the constituent features of the eighth or ninth aspect of the present invention, at least a portion of the outer peripheral surface of the flame path wall forming the flame path is covered. A heat shield cover made of a metal plate is provided so as to be opposed to and separated from the flame path wall. An air inlet communicating with the atmosphere is provided near the lower end of the heat shield cover. A chimney is provided by projecting upward from near the upper end of the heat cover. According to the tenth aspect of the present invention described above, the heat flow conducted from the inner peripheral surface to the outer peripheral surface of the flame path wall can be taken by the cooling wind by natural convection and discharged to the space above the air-cooled ammonia absorption refrigerator. In addition, the radiant heat radiated from the outer peripheral surface of the flame path wall whose temperature has been raised can be reflected and absorbed by the heat shield cover and cut off. As a result, it is possible to suppress an increase in the temperature inside the casing of the air-cooled ammonia absorption refrigerator, thermally protect control system equipment having poor heat resistance, and improve the operation reliability and durability of the entire refrigerator. . Further, since the above-mentioned ventilation is performed by natural convection which does not require installation of a fan / motor, the number of components is small and the manufacturing cost is low. In addition, power for driving the fan is not consumed, and vibration and noise are reduced. Does not occur.

According to an eleventh aspect of the present invention, in addition to the constituent features of the tenth aspect of the present invention, a bent metal tube or a metal manifold is attached along the heat shield cover made of a metal plate. Or the metal heat shield cover is a double plate to form a water jacket, and the metal bent pipe or manifold,
Alternatively, a means for supplying cooling water to the water jacket is provided, and a means for supplying hot water or hot water, which has been heated through the metal pipe or the water jacket and heated, for hot water supply is provided. It is characterized by the following. According to the eleventh aspect of the present invention described above, the heat flow radiated or transmitted from the flame path wall is blocked by the heat shield cover made of a metal plate, or air is cooled by the air flow guided by the heat shield cover. Not only do
Since a part of the heat flow can be carried out of the air-cooled ammonia absorption refrigeration system by the cooling water flow, the temperature rise in the refrigerator casing can be more effectively prevented, and the heat of the electronic components installed in the casing can be reduced. Protection is perfect. Further, since the components are prevented from being overheated, safety is high in terms of preventing the occurrence of flames and burns. In addition, the heat removed by the cooling water can be recovered and used effectively as warm water or hot water, so that the heat efficiency of the whole air-cooled ammonia absorption refrigerator can be improved.

[0020]

FIG. 1 is a perspective view schematically showing a generator and its heating means in a fuel oil fired air-cooled ammonia absorption refrigerator according to the present invention. FIG. Numeral 8 denotes a gun-type kerosene burner as an example of a gun-type fuel oil burner, and an arrow J indicates the direction of the flame outlet 8a, that is, the direction of flame injection. Flame spout 8 above
“a” is not directed toward the generator 1 as indicated by the imaginary arrow D, but is directed substantially horizontally toward the side of the generator as indicated by an arrow J. In a metaphorical manner, a flame is sprayed almost horizontally (arrow J) while aiming at the generator 1 without intentionally aiming at the generator 1. As described above with reference to FIG. 6, the injected flame becomes longer as a characteristic of the fuel oil burner than the fuel gas burner (not shown). As described above, the flame that is intentionally missed and directed toward the side (alongside) of the generator does not contact the generator 1 even if it is long. Considering this in detail, the fuel oil sprayed from the flame outlet 8a flows by inertia in the direction of arrow J while being mixed with air to cause a combustion reaction. It becomes a gas flow. The exotherm ends with the end of the combustion reaction and the visible flame disappears. The boundary between the flame and the combustion gas flow is difficult to determine exactly. In the present invention, a region emitting visible light under normal lighting conditions is defined as a flame. Since a combustion reaction is in progress in this flame region, when this flame is quenched, for example, by contacting the heat transfer fins 1a, incomplete combustion components (such as a mixture of carbon fine particles and tar content) are generated. A defect such as adhesion to the heat transfer fin occurs.

In this embodiment, the flame injected toward the side of the generator 1 and the combustion gas flow generated by the flame are swirled by the flame path wall 14 as described above. The shape of the flame path formed by the flame path wall 14 will be described later in detail with reference to FIG. In the present embodiment, the long flame injected from the kerosene burner 8 is swirled in an L-shape in a substantially horizontal plane by the flame path wall 14 to form an L-shaped long flame 9L. L
Since the V-shaped flow path is longer than the virtual straight flow path (arrow D), the combustion reaction is terminated while flowing along an L-shaped trajectory, and a high-temperature combustion gas flow (arrow e) is generated. And flows almost horizontally while contacting the heat transfer fins 1a.
It rises after passing around a. The reason for the rise is that it is expanded and lightened due to the high temperature and is sucked by the fan F '(see FIG. 5). FIG. 1 schematically illustrates one embodiment, in which a long flame 9L is swirling and flowing in an L-shape. Although not shown, the combustion reaction may be terminated while the flame injected from the flame outlet 8a is moving straight in the direction of the arrow J, and the generated combustion gas flow may be swirled in an L-shape. In any of the above embodiments, the flame does not contact the heat transfer fins 1a, and the high-temperature combustion gas flow (arrow e) flows in a substantially horizontal direction while contacting the heat transfer fins 1a.

FIG. 2 is a substantial sectional front view of one embodiment of the air-cooled ammonia absorption refrigerator according to the present invention, and corresponds to FIG. 5 illustrating a cross-section of a conventional air-cooled ammonia absorption refrigerator. It is. The air-cooled ammonia absorption refrigerator is divided near the imaginary plane zz shown in FIG. 5 (conventional example), and the right part of the figure is removed. Along with this,
The line burner 6 dedicated to gas fuel and the burner cover 11c are removed. Next, a kerosene burner 8 is attached as shown in FIG. This kerosene burner 8 is the “component device as an example of a liquid fuel burner” described above with reference to FIG. 1 (embodiment). In FIG. 2, the flame injection direction J of the kerosene burner 8 is orthogonal to the paper surface. And facing you. Reference numeral 14 denotes the flame passage wall described with reference to FIG. 1, and the zz plane in the drawing is a mounting surface of the flame passage constituted by the flame passage wall 14. A heat shield cover 15 is provided so as to cover at least a part (preferably most) of the outer peripheral surface of the flame path wall 14, and a chimney 15 c passed through and fixed to the top thereof penetrates the top wall of the modified casing 11. And project upward. The detailed structure of the heat shield cover 15 will be described later with reference to FIG.

FIG. 3 shows the flame path wall 14 shown in FIG.
And it is a typical perspective view shown for explaining the detailed structure of the heat shielding cover 15 which covers the flame path wall, and the generator is indicated by a virtual line. The flame path wall 14 is formed of a refractory material and forms a flame path. Its main role is to swirl the flame injected as indicated by arrow J (or the hot combustion gas generated by the flame) as indicated by arrow t and direct it toward generator 1. Here, it is important to consider the characteristics of the flame, especially the characteristics of the flame injected by the gun-type fuel oil burner, and to guide it reasonably. (See FIG. 7) A fuel oil burner, such as a gun type kerosene burner, is configured to finely atomize fuel and mix it with air. The fine atomization is performed to increase the contact area with the combustion air. Gun-type fuel oil burners include a method in which fuel oil is injected into the air at high pressure and a method in which fuel oil is mixed in a violent airflow. It violently collides with and is atomized, burns, generates heat, and becomes hot. The fuel oil burner generates a flame 9 which is longer than the gas burner (FIG. 7), but has not only a longer flame but also the following characteristics. As mentioned above,
The injected fuel oil collides violently with the air and diffuses, while the liquid fuel is oxidized to a gaseous volume, and the volume increases, and the thermal expansion due to the temperature rise causes the base of the flame. The vicinity s of the front end portion is wider than the vicinity r. Furthermore, the combustible gas that has been heated and thermally expanded becomes lighter, and receives upward buoyancy to curve upward as shown.

In order to swirl the flame so as not to oppose the characteristics of the flame described above (see FIG. 3), the flame path of this embodiment has a schematic planar projection shape (shape when projected on a virtual horizontal plane). It is formed to have an L-shape, but its elevational projection shape (that is, the up-down direction) is “L-shaped trumpet-shaped so as not to restrict the diffusion of the flame and the upward bending of the flame. "It has become. The trumpet shape, that is, the flared shape is important in relation to the fact that the heat receiving portion of the generator 1 (the area where the heat transfer fins 1a are disposed) has a dimension in the height direction. It is. Furthermore, in order to equalize the temperature distribution of the combustion product gas flow that contacts each of the plurality of heat transfer fins 1a,
As shown in FIG. 2, a flow straightening plate 13 for guiding a flame or a combustion product gas is provided in the flame path. The current plate 13 in the present embodiment is a stationary member and is a simple constituent member whose position and angle cannot be manipulated. However, the temperature distribution is made uniform, and the current plate 13 is forcibly turned into an L-shape. It has been experimentally confirmed that it is effective for preventing the generation of vortices in the flame. The uniform heating of the plurality of heat transfer fins is necessary in order to smoothly generate ammonia vapor in the generator 1 and to exhibit durability without overheating a part of the heat transfer fins. Is also effective.

As shown in FIG. 3, a cooling air inlet 15b is provided near the lower end of the heat shield cover main body 15a made of a metal plate.
And a chimney 15c is erected by communicating with the top of the heat shield cover main body 15a. As a result, the airflow generated by natural convection enters the heat shield cover main body 15a from the cooling air inlet 15b communicated with the atmosphere, flows upward while contacting the outer peripheral surface of the flame path wall 14, and flows through the flame path. The wall is cooled and discharged from the chimney 15c into the space above the refrigerator. The above-described air cooling means by natural convection does not require power for driving a fan, and equipment cost is low.
In addition, no operating noise or vibration occurs. As shown by the phantom line in FIG. 3, the bent metal tube 17 is
When the cooling water is circulated as indicated by arrows in and out in FIG. 5a, the cooling air due to the natural convection is cooled by the cooling water and the temperature rise is suppressed. Cooling. In addition, regardless of whether or not the above-mentioned cooling water flows, the radiant heat radiated from the outer peripheral surface of the flame path wall 14 is reflected and absorbed by the heat shield cover main body 5a.
The temperature rise in the casing of the air-cooled ammonia absorption refrigerator is suppressed, and components having poor heat resistance, such as electronic components for control, are thermally protected. Although not shown, a metal manifold may be provided in place of the bent metal tube, or the heat shield cover body 15a may be formed of a double metal plate to function as a water jacket. Cooling effect is obtained.

[0026]

As described above, according to the embodiment of the present invention, the structure and function of the present invention are clarified. According to the method of the first aspect of the present invention, a high-temperature combustion gas generated by burning gaseous fuel is produced. An air-cooled ammonia absorption refrigerator that generates ammonia vapor from an aqueous ammonia solution by contacting a stream with heat transfer fins of the generator and heating the generator to modify the overall shape and dimensions of the refrigerator The gaseous fuel can be converted to liquid fuel without significantly increasing the fuel cost, thereby reducing energy costs and, consequently, the running cost of the air-cooled ammonia absorption refrigerator. In general, when liquid fuel is burned with a gun type fuel oil burner, stable combustion can be performed with relatively simple and inexpensive combustion equipment,
Since the automatic control of the amount of generated heat is also easy, the air-cooled ammonia absorption refrigerator according to the present invention exhibits the advantages of the gun-type fuel oil burner by employing the gun-type fuel oil burner. However, since this gun-type fuel oil burner has the property of generating a long flame, simply applying it to the combustion system of an air-cooled ammonia absorption refrigerator will increase the shape and dimensions of the entire refrigerator. With the negative effect of doing so. Here, the method of modifying the air-cooled ammonia absorption refrigerator according to the present invention injects a flame toward the side (side) of the generator without directly facing the flame outlet for injecting a long flame to the generator. So that the flame does not directly contact the heat transfer fins of the generator. For this reason, there is no fear that a part of the heat transfer fins is locally heated or soot adheres to the heat transfer fins and hinders heat conduction. As described above, the harm caused by the flame contacting the heat transfer fins is prevented, and the hot combustion gas generated by the combustion reaction flows while flowing almost horizontally along the heat transfer fins. Since the generator is heated by conduction, excellent thermal efficiency is obtained and energy costs are further reduced.

According to the second aspect of the present invention, since the projected shape of the flame path in the horizontal plane is roughly L-shaped, the flame guided to this flame path roughly draws an L-shaped trajectory. To the generator while turning. For this reason, the flow path is longer than when the flame ejected from the fuel oil burner is blown to the generator via a straight course. Therefore, it is easy to terminate the combustion reaction before contacting the generator (that is, to terminate the formation of the flame). Furthermore, the shape of the flame is generally larger in the secondary combustion zone (the area near the tip of the flame where the combustion reaction with the secondary air takes place) than in the vicinity of the flame outlet. For this reason, it is desirable that the flame path does not significantly interfere with the above-mentioned “natural shape of the flame”. In this respect, in the configuration of the second aspect, the plane projection shape of the flame path is regulated so as to form an L shape, but the front view shape (elevated plane projection shape) is not regulated. large. In particular, it is desirable that the combustion product gas comes into contact with each of the plurality of heat transfer fins under as uniform conditions as possible (temperature, flow rate, pressure, density, etc.). The height dimension of the heat transfer fin arrangement area of the generator "should desirably substantially match. According to the constitutional requirements of the second aspect, as described above, there is no problem in configuring the flame passage so as to obtain the flame passage height corresponding to the “height of the heat transfer fins”.

According to the third aspect of the present invention, it is possible to prevent the generation of harmful vortices and to prevent the generation of harmful vortices in turning the flow direction of the flame or the combustion gas stream substantially at right angles by applying the first aspect of the present invention. Can uniformly heat the heat receiving portion to generate ammonia vapor smoothly.
That is, the flammable gas stream and the combustion product gas stream forming the injected flame do not swirl in the horizontal plane unless some external force is applied, because they have inertia themselves. In the present invention, the gas flow is guided to the L-shaped flame path, and the gas flow path is turned substantially at a right angle so that the planar projection shape of the flow trajectory is roughly L-shaped. Regulation alone does not guarantee that the interior of the gas stream will be kept in a rectified state. Furthermore, if the planar projection shape of the gas flow is merely regulated by the flame path of the steam, the uniform contact with the heat receiving portion (heat transfer fin) of the generator is considered when considering the elevation projection shape of the gas flow. Is not guaranteed. From this point of view, the third aspect of the present invention has the effect of preventing the generation of harmful eddy currents by providing the rectifying plate and controlling the vertical temperature distribution in the gas flow to make the temperature distribution uniform. The flame injected in the horizontal direction becomes lighter due to the expansion caused by the high temperature, and flows upward by inertia in the horizontal direction and bends upward due to buoyancy.
Here, by applying the present invention, the upward curvature of the flame is controlled without being guided by the rectifying plate, so that the temperature distribution in the vertical direction in the combustion product gas flow is made uniform. Can be more uniformly heated.

According to the method of the fourth aspect of the present invention, it is possible to effectively prevent adverse effects due to heat conducted from the flame and radiated heat.

When a combustion system device is provided in a large number of devices housed in one casing, it is only a publicly known and common technical knowledge to surround the combustion system device with a heat insulating structure. However, the heat insulating structure according to the present invention has a technical significance that goes beyond mere technical common sense. That is, as a basic configuration of the present invention, the burner for gaseous fuel in the prior art is changed to the burner for liquid fuel, so that it is difficult to avoid a long flame. According to the first to third aspects of the present invention, the long flame is improved so as not to contact the heat transfer fin of the generator. However, the long flame is not shortened, and the flame is still long. is there. Therefore, the amount of heat radiated from the flame to the periphery is larger than the amount of heat generated by the flame. If heat released from the combustion system is trapped in the casing of the refrigerator, the temperature may exceed the allowable temperature of the electronic device installed in the casing. Effective insulation technology, especially,
It is necessary to develop a heat insulating method suitable for insulating the outer peripheral surface of the flame path wall for guiding a long flame. From this point of view, in the present invention, the flame path wall is covered with a heat shield cover, and the heat conducted through the flame path wall is air-cooled, and the radiant heat radiated from the flame path wall is blocked by the heat shield cover. I do. In this way, each of the conduction heat and the radiant heat is effectively shut off by the heat shield cover, which is a single component, to suppress the temperature rise in the cover internal space of the air-cooled ammonia absorption refrigerator, The practical value of protecting inferior components is very large. Furthermore, looking at this heat insulation effect from other perspectives,
This also contributes to making the entire air-cooled ammonia absorption refrigerator compact.

According to the fifth aspect of the present invention, a cooling airflow is generated by natural convection without the need of a ventilation fan or a driving motor, so that the inner peripheral surface and the outer peripheral surface of the flame path wall can be formed. Is cooled by air, and the heated air can be discharged to the upper space of the air-cooled ammonia absorption refrigerator. Since no fan motor is required, power for ventilation cooling is not consumed. Therefore, the thermal efficiency of the whole air-cooled ammonia absorption refrigerator is not hindered. Also, since there is no need to install a fan, the entire refrigerator can be made compact and the remodeling cost can be reduced. Further, since there is no need for an electric member for supplying power to the fan motor, the air-cooled ammonia absorption can be performed. It does not complicate the wiring system and security equipment of the entire refrigerator. further,
Since there is no need to provide a fan motor, there is no danger of generating vibration or noise due to the fan motor. For example, there is no need to consider the case of the refrigerator to prevent resonance with the fan motor. Exercising.

According to the sixth aspect of the present invention, the heat shield cover can be used not only as a guide for cooling air, a guide for radiant heat and a reflecting member for radiant heat, but also as a heat insulating and hot water source. That is, the ventilation for cooling gradually increases the temperature while performing the cooling function, and loses the cooling function. Here, according to the configuration of the sixth aspect, the heat shield cover receives the conductive heat from the cooling air by receiving the contact of the “heated cooling air” and gives the received heat amount to the cooling water. For this reason, the temperature of the cooling air having the increased temperature is lowered again to restore the function of cooling the flame path wall. In the above description, for the sake of convenience, the operation and effect according to the sixth aspect are divided into two stages, such as increasing the temperature of the cooling air (decreasing the cooling capacity) and decreasing the temperature of the cooling air (recovering the cooling capacity). As described above, in practice, it is performed continuously rather than hierarchically. As a result, "the cooling air that has cooled the flame path wall is cooled by the cooling water through the heat shield cover on the other hand, so that the cooling air flows while maintaining the cooling function by suppressing the temperature rise, and flows. The effect of "cooling" is obtained. further,
Since the heat received by the heat shield from the cooling air is carried away by the cooling water stream, the cooling water flowing through the metal pipe attached to the heat shield or the water jacket formed by the heat shield is heated and heated. It flows out as hot or hot water. For this reason, the hot water or hot water can be used as a heat source for hot water supply. In this case, the hot water supply is broadly defined. For example, when the pipe configuration of the air-cooled ammonia absorption refrigerator is provided with a reversible switching means so that a heating action can be performed in winter, the above-described shielding is required. Hot water or hot water flowing out of the heat cover can be used as a heat source for heating assistance, and such a use method is also included in the technical scope of the present invention.

According to the seventh aspect of the present invention, as the heat source of the air-cooled ammonia absorption refrigerator, liquid fuel which is less expensive than gaseous fuel is used, and the heat transfer fins of the generator, which is the heated part, are burned out. There is no danger that heat generated by solid combustion (such as soot) will adhere to the heat transfer fins and hinder heat conduction. In addition, the overall configuration of the air-cooled ammonia absorption refrigerator can be made compact. it can. That is, an air-cooled ammonia absorption refrigerator requires some means for heating its generator. As a heat source of this heating means, there are electric power, gaseous fuel, and liquid fuel, each having a length. Among them, the liquid fuel does not violate social demands for leveling the electric power load, and has a low energy cost per calorie. Since the air-cooled ammonia absorption refrigerator according to the seventh aspect is provided with the gun-type fuel oil burner, the advantages of using the liquid fuel described above can be exhibited, and further, no power receiving equipment is required. The specific advantages of not requiring a power receiving facility are as follows. That is, when installing an air-cooled ammonia absorption refrigerator, it is not necessary to install power receiving equipment.
In addition to requiring no installation space for the power receiving equipment, the cost for installing the power receiving equipment is reduced. In addition, when the existing air-cooled ammonia absorption refrigerator of the electric power heating system is improved to the liquid fuel heating system according to the present invention, the capacity of the existing electric power receiving equipment has a margin, and for example, power consumption for office automation can be obtained. . As described above, the use of liquid fuel as a heat source in an air-cooled ammonia absorption refrigerator has a great advantage, but on the other hand, there is a characteristic that a large flame is generated as compared with gas fuel. If the flame becomes too long, the burner must be separated from the heat transfer fins. If the burner is not separated from the heat transfer fins, the flame will touch the heat transfer fins, causing adverse effects (overheating of the heat transfer fins, soot adhering to the heat transfer fins, preventing heat conduction) . When the burner is separated from the heat transfer fins, the shape and dimensions of the air-cooled ammonia absorption refrigerator become large. Under these circumstances, the present invention of claim 7 injects the flame toward the generator without directing the flame outlet of the fuel oil burner to the generator, so that the flame is transferred to the heat transfer fins of the generator. , And
It does not significantly increase the overall size of the air-cooled ammonia absorption refrigerator.

According to the eighth aspect of the present invention, the flame injected from the fuel oil burner is guided to a flame path made of a refractory material.
Since the plane projection shape of the above-mentioned flame path is substantially L-shaped, the flame and the high-temperature combustion gas flow guided thereby are forced to swirl in an L-shaped trajectory. However, the flame path is L-shaped because of its planar projection shape, and the elevation projection shape is not restricted. For this reason, the horizontal component of the flow velocity vector of the flame or combustion gas changes its direction into an L-shape, but it naturally diffuses in the vertical direction and also reduces the buoyancy of the atmosphere (because it is expanded at a high temperature and light). It cannot be prevented from receiving and bending upward.
In this way, without impairing the effect of claim 7 that "the overall shape and dimensions are not significantly increased", the "heat receiving portion of the generator (having the heat transfer fins Area) is uniformly contacted. Since the said flame path covers from the flame outlet of the fuel oil burner to the generator, the total flow rate of the combustion gas generated by the injected flame is effectively reduced without any other leakage. Guided to the generator, the efficiency of the air-cooled ammonia absorption refrigerator is high and economical, as well as `` the air temperature in the casing of the air-cooled ammonia absorption refrigerator increases due to leakage and high temperature gas, Components with poor heat resistance, such as installed control electronics, will break thermal damage, resulting in a loss of cooling function or an uncontrolled state. No, high operation reliability.

According to the ninth aspect of the present invention, the flame and / or combustion product gas forcedly swirled by the L-shaped flame path according to the eighth aspect flows smoothly and receives heat from the generator. The entire part (the heat transfer fin disposition area) can be uniformly heated. That is, since the flame injected substantially horizontally is not injected into the vacuum but into the air, the flame collides with the air and is diffused. That is, the tip of the visible flame is thicker than the root. In addition, since the flame is hot and is thermally expanded and lightened, it moves horizontally by inertia and bends upward due to the buoyancy of the atmosphere. Moreover, when the flow of the flame or the combustion product gas is forced to bend in the horizontal plane by the L-shaped flame path according to the present invention, the flame or the combustion product gas receives a considerably complicated force. In addition, since the generator as the heat receiving portion has a dimension in the height direction, and the portion having this height must be uniformly heated, the generated flame and the generated high-temperature gas flow must be released. Instead, it is desirable to control the flow so as to obtain a desired state. According to the configuration of the ninth aspect, the gas flow is controlled by the simple stationary member, the generation of the vortex is prevented, the operation of the air-cooled ammonia absorption refrigerator is stabilized, and the combustion product gas to which the heat transfer fin is in contact is provided. The temperature distribution of the stream can be made uniform.

According to the tenth aspect of the present invention, the heat flow conducted from the inner peripheral surface to the outer peripheral surface of the flame path wall can be taken by the cooling wind by natural convection and discharged to the space above the air-cooled ammonia absorption refrigerator. At the same time, the radiant heat radiated from the outer peripheral surface of the flame path wall whose temperature has been raised can be reflected and absorbed by the heat shield cover and cut off. As a result, it is possible to suppress an increase in the temperature inside the casing of the air-cooled ammonia absorption refrigerator, to thermally protect the control system equipment having poor heat resistance, and to improve the operation reliability and durability of the entire refrigerator. . Further, since the above-mentioned ventilation is performed by natural convection which does not require installation of a fan / motor, the number of components is small and the manufacturing cost is low. In addition, power for driving the fan is not consumed, and vibration and noise are reduced. Does not occur.

According to the eleventh aspect of the invention, the heat flow radiated or transmitted from the flame path wall is blocked by the heat shield cover made of a metal plate, or is cooled by the air flow guided by the heat shield cover. In addition, since a part of the heat flow can be carried out of the air-cooled ammonia absorption refrigerator by the cooling water flow, the temperature rise in the refrigerator casing is more effectively prevented, and the electronic components installed in the casing are prevented. The thermal protection of the parts is perfect. Further, since the components are prevented from being overheated, the safety is high in terms of preventing the occurrence of flames and of preventing burns. In addition, since the heat removed by the cooling water can be recovered and used effectively as hot water or hot water, the heat efficiency of the whole air-cooled ammonia absorption refrigerator can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically illustrating a generator and its heating means in a fuel oil fired air-cooled ammonia absorption refrigerator according to the present invention, with arrows indicating the flow direction of gas added thereto.

FIG. 2 is a substantial cross-sectional front view of the air-cooled ammonia absorption refrigerator according to one embodiment of the present invention, and is a diagram corresponding to FIG. 5 illustrating a cross-section of a conventional air-cooled ammonia absorption refrigerator.

FIG. 3 is a schematic perspective view showing a detailed structure of the flame path wall 14 shown in FIG. 2 and a heat shield cover 15 covering the flame path wall. Is added by a virtual line.

FIG. 4 is a schematic cross-sectional view illustrating a conventional example of an air-cooled absorption refrigerator in which a vapor of ammonia and an aqueous solution thereof are circulated;
It is an explanatory view of a function.

FIG. 5 shows the actual configuration of components of a conventional air-cooled ammonia absorption refrigerator having a schematic circulation system shown in FIG.
In particular, it is a cross-sectional view for showing the actual state of the arrangement of the generator and the burner, omitting arrows indicating the circulating flow direction of the heat transfer medium, arrows indicating the flow direction of air and combustion gas, An arrow indicating the direction of circulation of the pipeline is added.

FIG. 6 is a diagram schematically illustrating various types of burners in order to explain the length of a gas fuel and a liquid fuel as heat sources in an air-cooled ammonia absorption refrigerator; FIG. (B) is a perspective view of a line burner in which a plurality of the line burners are arranged horizontally, (C) is a front view of a line burner which is vertically arranged facing a generator, and (D).
FIG. 7 is a front view in a case where a kerosene burner is directly opposed to the generator in place of the line burner.

FIG. 7 shows a prototype refrigerator assuming a case where the air-cooled ammonia absorption refrigerator of the conventional example shown in FIG. 5 is modified to be equipped with a kerosene burner 8 shown in FIG. 6 (D). It is sectional drawing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Generator of an air-cooled ammonia absorption refrigerator, 1a ... Heat transfer fin attached to the said generator, 2 ... Burner, 3 ... Condenser, 4 ... Evaporator, 5 ... Absorber, 5s ... Absorber , A line burner for gaseous fuel, 6a to 6d ... line burner, 6v ... a line burner arranged along a vertical plane, 7 ... a flame, 8 ... an example of a fuel oil burner. Kerosene burner, 8a: Flame outlet of kerosene burner, 9: long flame, 9L: long flame of L shape, 10: high temperature combustion gas flow, 11: casing of air-cooled ammonia absorption refrigerator, 11 '... 11a ... cover body, 11b ... fan cover, 11
c: Burner cover, 12: Casing, 12a: Main body, 12b: Combustion chamber cover, 12c: Fan cover, 13: Rectifying plate, 14: Flame wall, 15: Heat shield cover,
15a: heat shield cover body, 15b: cooling air intake, 1
5c: chimney, 16: flame path, 17: metal pipe, 19: fuel pipe, 28: fan coil unit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenori Iwao 1-9-1 Kida Yotodai, Tsuchiura-shi, Ibaraki Hitachi Building Facilities Engineering Co., Ltd. 1-9-1 Hitachi Building Facility Engineering Co., Ltd. (72) Inventor Keiji Tachibana Hitachi Building Facility Engineering Co., Ltd. 1 Kanda Izumicho, Chiyoda-ku, Tokyo

Claims (11)

[Claims] 1. A generator for heating an aqueous solution of ammonia to generate ammonia vapor, a substantially horizontal heat transfer fin provided on an outer periphery of the generator, and a high-temperature heat transfer fin flowing in contact with the heat transfer fin. A burner for generating combustion gas, a condenser for liquefying the ammonia vapor generated by the generator, and an evaporator for evaporating the condensed ammonia liquid to cool the brine, and wherein the burner is a gaseous fuel. In a method of remodeling an air-cooled ammonia absorption refrigerator that is a system that burns a liquid fuel, a burner that burns the gaseous fuel is removed, and a gun-type fuel oil burner is installed. The gun type fuel oil burner is directed to the side of the generator without causing the flame outlet of the gun type fuel oil burner to face the generator. The combustion flame of the fuel oil is brought into contact with the heat transfer fins of the generator by swirling the flame ejected from the cylinder or the high-temperature combustion gas flow generated by combustion at a right angle in the direction of approaching the generator. A method for remodeling an air-cooled ammonia absorption refrigerator, characterized in that a high-temperature combustion product gas flow after combustion is caused to flow substantially horizontally along the heat transfer fins. 2. A flame path having a generally L-shaped projected shape in a horizontal plane is provided between a flame outlet of the gun type fuel oil burner and a heat transfer fin of a generator. Inducing the flame ejected from the outlet, terminating the combustion reaction until the mixed flow of the liquid fuel sprayed from the fuel oil burner and the combustion air reaches the heat transfer fins, the flame transfers heat The method for remodeling an air-cooled ammonia absorption refrigerator according to claim 1, wherein the air-cooled ammonia absorption refrigerator is prevented from contacting the fins. 3. A flammable gas stream injected from a flame outlet of the fuel oil burner to form a flame and / or a hot combustion gas stream generated by the flammable gas stream. By arranging a flow straightening plate and controlling the flow direction and the gas flow density of the gas flow, and the gas flow velocity, while suppressing the non-uniform temperature distribution of the gas flow contacting the heat transfer fins of the generator, The method for remodeling an air-cooled ammonia absorption refrigerator according to claim 2, wherein harmful eddy currents in the gas flow path are suppressed. 4. The flame path is made of a refractory material, and a heat shield cover made of a metal plate is provided so as to cover at least a part of the flame path wall made of the refractory material. By allowing cooling air to flow between the wall and the heat shield cover, the air flowing in contact with the outer peripheral surface of the wall of the flame path cools the wall of the flame path, The method for remodeling an air-cooled ammonia absorption refrigerator according to claim 2 or 3, wherein radiant heat radiated from an outer peripheral surface is blocked by the heat shield cover. 5. An air inlet communicating with the atmosphere is provided near a lower end of the heat shield cover covering the flame path wall, and a chimney communicating with an upper end of the heat shield cover is provided. The method for remodeling an air-cooled ammonia absorption refrigerator according to claim 4, wherein a cooling airflow is generated between the flame path wall and the heat shield cover by natural convection. 6. A water jacket is formed by disposing a metal tubular member along the heat shield cover made of a metal plate, or by forming the heat shield cover by a double plate. The cooling water is circulated through a pipe or a water jacket, and hot water or hot water which has a cooling effect and is heated is supplied for hot water supply.
The method for remodeling the air-cooled ammonia absorption refrigerator described in the above. 7. A generator for heating an aqueous solution of ammonia to generate ammonia vapor, a substantially horizontal heat transfer fin provided on an outer periphery of the generator, and a high-temperature heat transfer fin flowing in contact with the heat transfer fin. An air-cooled ammonia absorption refrigerator including a burner for generating combustion gas, a condenser for liquefying ammonia vapor generated by the generator, and an evaporator for vaporizing condensed ammonia and cooling brine. The burner is a gun-type fuel oil burner, and the flame outlet of the gun-type fuel oil burner is not directed to the generator, but is directed substantially toward the side of the generator. It is installed so as to emit a flame horizontally, and the emitted flame terminates the combustion reaction without reaching the heat transfer fins of the generator, and is generated by the combustion reaction described above. An air-cooled ammonia absorption refrigerator having a structure in which high-temperature combustion gas contacts the heat transfer fins while flowing substantially horizontally. 8. A flame passage comprising a flame passage wall made of a refractory material is provided between a flame outlet of the fuel oil burner and a heat transfer fin of the generator, and is formed by the flame passage wall. The projected shape of the flame path in the horizontal plane is generally L-shaped, and the gas flow of the flammable gas injected from the fuel oil burner to form a flame, and the flammable gas has finished forming the flame 8. The air-cooled ammonia absorption refrigerator according to claim 7, wherein the gas flow of the combustion product gas thereafter is guided by the wall of the flame path and turns substantially in an L-shape. 9. A rectifying plate made of a refractory material, which is located in a space surrounded by the flame path wall and guides a flame and / or a combustion product gas injected from a burner. The air-cooled ammonia absorption refrigerator according to claim 8, characterized in that: 10. A heat shield cover made of a metal plate is provided so as to cover at least a part of the outer peripheral surface of the flame path wall forming the flame path and to be opposed to and separated from the flame path wall. An air inlet communicating with the atmosphere is provided near the lower end of the heat shield cover, and a chimney is provided by protruding upward from near the upper end of the heat shield cover. An air-cooled ammonia absorption refrigerator according to claim 8 or 9. 11. A water jacket, wherein a bent metal tube or a metal manifold is attached along the metal plate heat shield cover, or the metal plate heat shield cover is a double plate. And means for supplying cooling water to the metal bent pipe or manifold or the water jacket are provided, and the cooling water flows through the metal pipe or the water jacket and rises. A means for supplying warm hot water or hot water for hot water supply is provided,
An air-cooled ammonia absorption refrigerator according to claim 10.