JP5019920B2 - Absorber refrigerator regenerator - Google Patents

Description

  The present invention provides a heat transfer member that allows a heating medium to pass through and has an outer surface formed as a heat transfer surface in the regenerator body, and a mixed liquid of an absorbing liquid and a refrigerant is formed on the heat transfer surface above the heat transfer member. The present invention relates to a regenerator for a so-called falling liquid film type absorption chiller in which a mixed liquid supply unit that supplies a liquid film by natural flow is provided, and the mixed liquid is heated and boiled to generate refrigerant vapor.

  As a regenerator for an absorption refrigeration machine, there is a full liquid type regenerator in which a heat transfer pipe for passing a heating medium is provided in a container for storing a mixed liquid, and the mixed liquid is heated. In this case, the boiling temperature of the solution depends on the pressure, and since the liquid depth exists when the heat transfer pipe is immersed in the liquid mixture in the container, the pressure on the heat transfer surface increases and the boiling temperature of the liquid mixture rises. There is an inconvenience. In addition, when engine exhaust heat typified by a cogeneration system is used as a heating medium, there is an inconvenience that the engine exhaust heat temperature cannot be increased too much due to constraints such as engine durability and engine oil deterioration. .

In order to avoid such an inconvenience, a falling liquid film type refrigerating machine for an absorption refrigerator is advantageous. Conventionally, the following are known.
That is, a required number of passages formed by inserting wave-shaped fins between tube plates and closed by spacer bars are laminated, and relatively narrow heating fluid passages and wide solution passages are alternately laminated. .
A heating fluid (warm water) is introduced into the heating fluid passage from below, and is configured to rise and flow out of the passage.
In the upper part of the heating fluid passage, a dilute solution introduction / distribution section is provided in the space separated by the spacer bar, and a nozzle with a through hole is provided in the tube plate with the adjacent solution passage to distribute the dilute solution in the introduction / distribution section. Then, the liquid is introduced into the solution passage and allowed to flow down the liquid film.
With the above configuration, the dilute solution is introduced from the introduction / distribution section into the solution passage through the nozzle, and while the liquid film flows down in the solution passage, heat exchange is performed with the heating fluid that rises in the adjacent heating fluid passage. Refrigerant vapor is generated in the solution, and the solution is sequentially concentrated to become a concentrated solution. The concentrated solution separated in the separation space is sent to the absorber, while the refrigerant vapor is supplied to the condenser. (See Patent Document 1).
JP-A-8-105669

However, when the solution is allowed to flow down on the surface of the tube plate, there are the following problems.
If the nozzle diameter is reduced and a large number of nozzles are provided, there is a drawback that dust clogging or rust clogging over time tends to occur.
Conversely, if the nozzle diameter is increased and the interval is increased so that the flow rate does not change, the area where the liquid film is formed is reduced, the liquid film thickness is increased, and heat transfer efficiency is reduced.
In addition, if the nozzle diameter is increased and more are provided, the amount of outflow increases, so the solution height at the introduction / distribution section decreases, and the solution is less likely to be uniformly distributed to each nozzle. Even a slight inclination of the distribution section has an effect on the supply of the solution, and a high degree of work accuracy is required for the production of the regenerator.
Further, when the solution is sprayed on the surface of the tube plate with a spray nozzle, there is a disadvantage that a running cost increases because a large pump power is required even though it is advantageous for forming a liquid film.

  This invention is made | formed in view of such a situation, Comprising: The invention which concerns on Claim 1 can improve heat-transfer efficiency by forming a thin liquid film on the heat-transfer surface of a heat-transfer member as much as possible in an area. The inventions according to claims 2 and 3 aim to make it possible to heat and boil the mixture efficiently, and the inventions according to claims 4 and 5 can be achieved by adding a simple configuration. An object of the present invention is to improve heat transfer efficiency, and an object of the invention according to claim 6 is to enable stable heat transfer efficiency.

In order to achieve the above-described object, the invention according to claim 1
In the regenerator main body, a heat transfer member that passes a heating medium and has an outer surface formed as a heat transfer surface is provided, and a liquid mixture of an absorbing liquid and a refrigerant is formed on the heat transfer surface above the heat transfer member. In a regenerator for an absorption refrigeration machine that is provided with a liquid mixture supply unit that is supplied by natural flow to generate a refrigerant vapor by heating and boiling the liquid mixture,
The mixed liquid supply unit,
A liquid reservoir for storing the liquid mixture;
A first mixed liquid supply unit that is provided in the liquid reservoir part at a predetermined interval in a direction along the heat transfer surface and supplies the mixed liquid to the heat transfer surface in contact with the first liquid supply part;
The liquid reservoir portion is provided above the first liquid mixture supply portion, and a large amount of liquid mixture is supplied to the liquid reservoir portion so that the liquid mixture has a high depth in the liquid reservoir portion. In addition to the liquid mixture from the first liquid mixture supply unit, a second liquid mixture supply unit that supplies the liquid mixture in contact with the heat transfer surface is provided.

(Action / Effect)
According to the configuration of the regenerator for an absorption refrigerator according to the first aspect of the present invention, for example, compared with a normal engine rated operation state such as at the start of operation where there is no pressure difference between the regenerator and the absorber connected thereto. When the supply amount of the liquid mixture to the liquid reservoir is large and the liquid depth of the liquid mixture in the liquid reservoir increases, the liquid reservoir passes through both the first and second liquid mixture supply units. The mixed liquid is contact-supplied to the heat transfer surface, a wide wet wall is formed on the heat transfer surface of the heat transfer member, and then the pressure of the regenerator is higher than that of the absorber, such as in the normal operating condition of the engine. In a state where the supply amount of the mixed liquid is reduced and stably supplied to the regenerator, a small amount of the mixed liquid is contacted and supplied from the liquid reservoir to the heat transfer surface only through the first mixed liquid supply part, A thin liquid film is formed on the wet wall once formed, and the heating medium is passed through the heat transfer surface. Can transmit the heat to the liquid film-like mixture.
Therefore, since a thin liquid film is formed on the heat transfer surface of the heat transfer member as wide as possible and the heat of the heating medium is transmitted to the liquid film-like mixed liquid via the heat transfer surface, the heat transfer efficiency can be improved.

In order to achieve the above-described object, the invention according to claim 2
In the absorption refrigerator regenerator according to claim 1,
The heat transfer member is a plate having a heat transfer surface in the vertical direction, and the heating medium is configured to flow from the lower part to the upper part in the plate.

(Action / Effect)
According to the configuration of the regenerator for an absorption refrigerator according to the second aspect of the present invention, the lower the temperature, the higher the heat can be transmitted from the heating medium to the liquid film mixture on the heat transfer surface of the plate.
Therefore, it can be avoided that high temperature heat is transmitted above the formed liquid film and the liquid film is interrupted to reduce the liquid film forming area, and the mixed liquid can be heated and boiled efficiently.

In order to achieve the above-described object, the invention according to claim 3
In the absorption refrigerator regenerator according to claim 1,
The heat transfer member is a pipe that extends in the horizontal direction and is arranged at intervals in the vertical direction, and is configured so that the heating medium flows through the pipe from the lower part to the upper part.

(Action / Effect)
According to the configuration of the regenerator for an absorption refrigerator according to the third aspect of the present invention, heat that is higher in the lower part can be transmitted from the heating medium to the liquid film-like mixed liquid on the heat transfer surface of the pipe.
Therefore, it can be avoided that high temperature heat is transmitted above the formed liquid film and the liquid film is interrupted to reduce the liquid film forming area, and the mixed liquid can be heated and boiled efficiently.

In order to achieve the above-described object, the invention according to claim 4
In the absorption refrigerator regenerator according to any one of claims 1, 2, and 3,
The first mixed liquid supply unit is configured to form a first spray hole at a predetermined interval in the longitudinal direction of the liquid reservoir, and the second mixed liquid supply unit is formed in the liquid reservoir. A second spray hole is formed above the first spray hole and at a position intermediate to the first spray hole in the horizontal direction.

(Action / Effect)
According to the configuration of the refrigerating machine for an absorption refrigerator according to the fourth aspect of the present invention, the first and second mixed liquid supply sections can be configured simply by forming the holes in the liquid reservoir section with a predetermined arrangement, and the simple configuration. Heat transfer efficiency can be improved by adding a configuration.

In order to achieve the above-described object, the invention according to claim 5
In the absorption refrigerator regenerator according to any one of claims 1, 2, and 3,
The first mixed liquid supply unit is configured to form a first spray hole at a predetermined interval in the longitudinal direction of the liquid reservoir, and the second mixed liquid supply unit is formed in the liquid reservoir. A second spray hole is formed at a position above the first spray hole and overlapping the first spray hole in the vertical direction.

(Action / Effect)
According to the configuration of the regenerator for an absorption refrigerator of the invention according to claim 5, the first and second mixed liquid supply sections can be configured simply by forming the holes in the liquid reservoir section with a predetermined arrangement, and the simple configuration. Heat transfer efficiency can be improved by adding a configuration.

In order to achieve the above object, the invention according to claim 6 provides:
In the refrigerating machine for an absorption refrigerator according to any one of claims 1, 2, 3, 4, and 5,
A heat transfer efficiency decrease detecting means for detecting a decrease in heat transfer efficiency or more and outputting a liquid increase signal;
And a liquid mixture supply amount increasing means for increasing the discharge amount of the liquid mixture pump for supplying the liquid mixture to the liquid mixture supply section in response to a liquid increase signal from the heat transfer efficiency decrease detecting means for a set time.
The heat transfer efficiency decrease detecting means measures the temperature of the refrigerant vapor discharged from the regenerator and detects that the temperature is lower than the set temperature, or the temperature of the heating medium supplied to the heat transfer member and the heat transfer. The difference between the temperature of the heating medium flowing out of the heating member and the temperature of the mixed liquid supplied to the regenerator is detected by detecting that the difference between the temperature of the heating medium flowing out of the heating member is less than the set value. Something that detects when it is below the setting is adopted.

(Action / Effect)
According to the configuration of the regenerator for an absorption refrigerator of the invention according to claim 6, the temperature of the heating medium is lowered during operation or the amount of the mixed liquid supplied to the liquid reservoir of the regenerator is reduced. If the liquid film formation range is temporarily narrowed due to, for example, or the like, and the heat transfer efficiency is reduced, supply of the mixed liquid supplied to the liquid reservoir is detected based on the decrease in the heat transfer efficiency Increase the amount, contact and supply the mixed liquid from the liquid reservoir to the heat transfer surface through both the first and second mixed liquid supply units, and form a wide wet wall on the heat transfer surface of the heat transfer member, This prevents the reduction of the formation range of the continuation.
Therefore, even if a reduced state of the formation range of the liquid film occurs, the state can be eliminated at an early stage, so that the heat transfer efficiency can be stably stabilized.

As is clear from the above description, according to the configuration of the regenerator for an absorption chiller of the invention according to claim 1, for example, at the start of operation where there is no pressure difference between the regenerator and the absorber connected thereto. When the supply amount of the liquid mixture to the liquid reservoir is larger than that in the rated operating state of the normal engine and the liquid depth of the liquid mixture in the liquid reservoir becomes high , the first and second liquid mixtures The mixed liquid is contacted and supplied from the liquid reservoir to the heat transfer surface through both of the supply units, and a wide wetting wall is formed on the heat transfer surface of the heat transfer member, and then the absorber is used as in the rated operating state of a normal engine. In a state where the pressure of the regenerator is higher and the supply amount of the mixed liquid is reduced and is stably supplied to the regenerator, the liquid reservoir is transferred from the liquid reservoir to the heat transfer surface only through the first mixed liquid supply part. A small amount of liquid mixture is supplied in contact, and a thin liquid film is formed on the wet wall once formed. Formed, it is possible to transfer heat of the heating medium through the heat transfer surfaces on the liquid film-like mixture.
Therefore, since a thin liquid film is formed on the heat transfer surface of the heat transfer member as wide as possible and the heat of the heating medium is transmitted to the liquid film-like mixed liquid via the heat transfer surface, the heat transfer efficiency can be improved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an overall schematic configuration diagram of an absorption refrigerator showing a first embodiment of an absorption refrigerator regenerator according to the present invention, in which exhaust heat (engine cooling water) from an engine cooling unit of a gas engine (not shown) is shown. ) In the regenerator 1 that supplies as a heating medium, an aqueous lithium bromide solution (mixed) using water that can be evaporated by low-pressure engine cooling water (for example, temperature 85 ° C.) as a refrigerant and a lithium bromide solution as an absorbent. Liquid).

  A condenser 2 is communicatively connected to the regenerator 1 via a first pipe 3 so as to supply refrigerant vapor from which the absorption liquid has been separated, and an absorber 5 is connected to the regenerator 1 via a second pipe 4. In addition to being connected, an evaporator 7 is connected to the condenser 2 via a third pipe 6, and the absorber 5 and the evaporator 7 are connected in communication via a slit 8 to constitute an absorption refrigerator. ing.

  The condenser 2 includes a first heat exchange pipe 9 with fins for flowing the refrigerant vapor from the regenerator 1, a first fan 10 that supplies outside air to the first heat exchange pipe 9, and a liquid reservoir 11, the refrigerant vapor is condensed and liquefied by air cooling, the liquefied refrigerant liquid is stored in the liquid reservoir 11, and the liquefied refrigerant liquid is supplied to the evaporator 7.

The evaporator 7 includes a refrigerant liquid reservoir 13 provided with a spray nozzle 12 and a dispersion plate 14 for dispersing the refrigerant liquid flowing down from the refrigerant liquid reservoir 13.
A circulation pipe 17 including a refrigerant pump 15 and a cold heat extraction heat exchanger 16 is connected to the lower portion of the evaporator 7 and the liquid reservoir portion 13.
A refrigerant inlet pipe 18 and a refrigerant supply pipe 19 for a gas heat pump are connected to the cold heat extraction heat exchanger 16, and the refrigerant liquid is evaporated and cooled along with the absorption of the refrigerant by the absorbing liquid in the absorber 5. The refrigerant for the gas heat pump is cooled by the liquid.

  The absorber 5 is provided with an absorbent dispersion pipe 20 at the top, and the absorbent dispersion pipe 20 and the lower part of the absorber 5 connect the mixed liquid pump 21 and the second heat exchange pipe 22 with fins. A second fan 24 is connected to the second heat exchanging pipe 22 to supply outside air to the second heat exchanging pipe 22 and is supercooled while circulating the absorbing liquid. The amount of refrigerant absorbed can be increased.

  A fifth pipe 25 is connected across the regenerator 1 and the portion between the mixed liquid pump 21 of the fourth pipe 23 and the second heat exchange pipe 22 with fins. A part of the fourth pipe 23 and the fifth pipe 25 constitute the second pipe 4. The lower part of the regenerator 1 and the absorber 5 are connected via a sixth pipe 26, and a heat exchanger 27 is provided between the sixth pipe 26 and the fifth pipe 25. The liquid mixture to be returned is heated by the absorbent flowing from the regenerator 1 to the absorber 5.

  As shown in the partially omitted front view of FIG. 2 and the partially omitted side view of FIG. 3, the regenerator 1 is a vertical heat transfer member having an outer surface formed as a heat transfer surface in the regenerator main body 28. The plate 29 having the heat transfer surface in the direction is juxtaposed in the horizontal direction, and a heating medium supply pipe 30 for supplying engine cooling water after engine cooling into the plate 29 is connected to the lower portion of the plate 29, A heating medium take-out pipe 31 for taking out engine cooling water cooled by heat exchange with the liquid mixture from the plate 29 is connected to the upper part.

  A tray 32 serving as a liquid reservoir is provided above the plate 29 in a state of being substantially the same thickness as the plate 29 and overlapping in plan view, and the tray 32 and the plate 29 are connected via a pair of guide plates 33. Yes. A header tray 34 is connected between the trays 32, and the mixed liquid is distributed and supplied to the tray 32 via the header tray 34.

On the lower side of both lateral sides of the tray 32, as shown in an enlarged side view of the main part of FIG. 4 and an enlarged front sectional view of the main part of FIG. 5 (cross-sectional view taken along line AA in FIG. 4), A first spray hole 35 is formed as a first liquid mixture supply section at a predetermined interval in the longitudinal direction.
In addition, a second mixture having a larger diameter (about twice) than the first spray hole 35 is located above the first spray hole 35 and at a position overlapping the first spray hole 35 in the vertical direction. A second spray hole 36 is formed as a liquid supply unit.
The guide plate 33 is formed with a vertical notch 37 that is continuous with the first and second spray holes 35, 36, and is transmitted from the first spray hole 35 or the first and second spray holes while passing through the notch 37. The mixed liquid is contact-supplied from both 35 and 36 to the heat transfer surface, and the mixed liquid can flow down to the heat transfer surface of the plate 29 in the form of a liquid film.

  With the above configuration, the pressure in the absorber 5 is equal to the pressure in the regenerator 1 in the initial stage of operation and the mixed liquid pump 21 supplies a larger amount of liquid mixture to the tray 32 than in the rated operation state. When the liquid depth of the liquid mixture is high, the liquid mixture is contact-supplied to the heat transfer surface from both the first and second spray holes 35, 36, a liquid film is formed in a wide range, and the operation is shifted to the rated operation state. In the state where refrigerant vapor is generated by evaporation of the mixed liquid and the pressure in the regenerator 1 is reduced to a predetermined amount of the mixed liquid supplied to the tray 32 as the pressure in the regenerator 1 increases, the vapor is transmitted from the first spray hole 35. The mixed liquid is contacted and supplied to the hot surface, and the mixed liquid flows down in the form of a liquid film while maintaining the wide liquid film range formed in the initial stage, so that the heat transfer efficiency to the mixed liquid can be maintained at a high level. .

  FIG. 6 is an enlarged side view of the second embodiment of the refrigerating machine for absorption refrigerator according to the present invention. The differences from the first embodiment are as follows.

In other words, the second spraying holes 36 are formed on both lateral sides of the tray 32 above the first spraying holes 35 and at a position intermediate to the first spraying holes 35 in the horizontal direction.
The guide plate 33 is formed with a first notch 41 that is short in the vertical direction that is continuous with the first spray hole 35 and a second notch 42 that is long in the vertical direction that is continuous with the second spray hole 36. While passing through the notch 41 or the first and second notches 41, 42, the mixed liquid is contact-supplied to the heat transfer surface from the first spray hole 35 or from both the first and second spray holes 35, 36, The mixed liquid can flow down on the heat transfer surface of the plate 29 in the form of a liquid film. Other configurations are the same as those of the first embodiment, and the description thereof is omitted by giving the same numbers.

  FIG. 7 is a schematic configuration diagram of a regenerator for an absorption chiller according to a third embodiment of the present invention (in this drawing, configurations of fourth and fifth embodiments described later are also shown), and the first pipe 3 In addition, a temperature sensor 51 for measuring the temperature of the refrigerant vapor is provided, a controller 52 is connected to the temperature sensor 51, and a liquid mixture pump that supplies the liquid mixture from the absorber 5 to the controller 52 to the regenerator 1. 21 is connected.

As shown in the block diagram of the control system in FIG. 8, the controller 52 includes a temperature comparison unit 53 and a mixed liquid supply amount increase unit 54. The temperature comparison unit 53 compares the temperature of the refrigerant vapor measured by the temperature sensor 51 with a set temperature (for example, 50 ° C.), and outputs a liquid increase signal when the temperature of the refrigerant vapor becomes lower than the set temperature. It is supposed to be.
The liquid mixture supply amount increasing means 54 increases the discharge amount of the liquid mixture pump 21 that supplies the liquid mixture to the tray 32 in response to the liquid increase signal from the temperature comparison means 53 by a set time (for example, 5 minutes). It has become. Other configurations are the same as those of the first embodiment, and the description thereof is omitted by giving the same numbers.

  According to the third embodiment, the temperature of the heating medium is lowered during operation, or the amount of the mixed liquid supplied to the tray 32 of the regenerator 1 is temporarily reduced. When the formation range of the liquid film is narrowed and the heat transfer efficiency is decreased, the decrease in the heat transfer efficiency is detected by the temperature decrease of the refrigerant vapor, and based on this, the supply amount of the mixed liquid supplied to the tray 32 is increased, The mixed liquid is contacted and supplied from the tray 32 to the heat transfer surface through both the first and second spray holes 35 and 36, a wide wet wall is formed on the heat transfer surface of the plate 29, and the liquid film formation range is reduced. It can be prevented from continuing.

  FIG. 9 is a block diagram of a control system according to the fourth embodiment of the regenerator for an absorption refrigerator according to the present invention. The temperature of the engine coolant is supplied to the heating medium supply pipe 30 that supplies the engine coolant to the regenerator 1. A first cooling water temperature sensor 61 for measuring is provided, and a second cooling water temperature sensor for measuring the temperature of the engine cooling water after heat exchange is provided in the heating medium take-out pipe 31 for taking out the engine cooling water from the regenerator 1. 62 is provided, and the controller 63 is connected to the first and second cooling water temperature sensors 61 and 62, and the liquid mixture pump 21 that supplies the liquid mixture from the absorber 5 to the regenerator 1 is connected to the controller 63. It is connected.

The controller 63 includes a temperature difference calculating unit 64, a temperature difference comparing unit 65, and a mixed liquid supply amount increasing unit 66.
In the temperature difference calculation means 64, the temperature between the engine coolant temperature measured by the first coolant temperature sensor 61 and the engine coolant temperature after heat exchange measured by the second coolant temperature sensor 62. The difference is calculated.
The temperature difference comparison means 65 compares the temperature difference calculated by the temperature difference calculation means 64 with a set value (for example, 3.0 ° C.), and outputs a liquid increase signal when the temperature difference becomes smaller than the set value. It is designed to output.
The mixed liquid supply amount increasing means 66 increases the discharge amount of the mixed liquid pump 21 that supplies the mixed liquid to the tray 32 in response to the liquid increase signal from the temperature difference comparing means 65 by a set time (for example, 5 minutes). It is like that. Other configurations are the same as those of the third embodiment, and the description thereof is omitted by giving the same numbers.

  The effect of the fourth embodiment is the same as that of the third embodiment, so that a wide wetted wall is formed on the heat transfer surface of the plate 29 and the liquid film formation range can be prevented from continuing to be reduced.

FIG. 10 is a block diagram of the control system of the fifth embodiment of the refrigerating machine for absorption refrigerator according to the present invention. The difference from the fourth embodiment is as follows.
That is, the sixth pipe 26 for taking out the absorbing liquid from the regenerator 1 is provided with the absorbing liquid temperature sensor 71 for measuring the temperature of the absorbing liquid, and the fifth pipe 25 for supplying the mixed liquid to the regenerator 1 A liquid mixture temperature sensor 72 for measuring the temperature of the liquid mixture is provided, the controller 63 is connected to the absorption liquid temperature sensor 71 and the liquid mixture temperature sensor 72, and the liquid mixture pump 21 is connected to the controller 63.
The configuration of the controller 63 and the other configurations are the same as those in the fourth embodiment, and the description thereof will be omitted by giving the same numbers. The set value input to the temperature difference comparison means 64 is 11.0 ° C., for example.

  The effect of the fifth embodiment is the same as that of the third embodiment, so that a wide wetted wall can be formed on the heat transfer surface of the plate 29 and the liquid film formation range can be prevented from continuing to be reduced.

  A configuration comprising the temperature sensor 51 and the temperature comparison means 53 in the third embodiment, a configuration comprising the first and second cooling water temperature sensors 61 and 62, the temperature difference calculation means 64 and the temperature difference comparison means 65 in the fourth embodiment; Each of the configurations of the absorption liquid temperature sensor 71, the mixed liquid temperature sensor 72, the temperature difference calculation means 64, and the temperature difference comparison means 65 in the fifth embodiment is used to detect a decrease in heat transfer efficiency or more and output a liquid increase signal. This is referred to as heat transfer efficiency reduction detecting means.

  In the above embodiment, the plate 29 having the heat transfer surface in the vertical direction is shown as the heat transfer member through which the heating medium is passed and the outer surface is formed as the heat transfer surface. The pipe may be arranged at intervals in the direction, and the heating medium may be flowed into the pipe from the lower part to the upper part (Claim 3).

  The present invention can also be applied to a low-temperature regenerator in an absorption refrigerator comprising a high-temperature regenerator and a low-temperature regenerator that heats a mixed solution with a burner.

1 is an overall schematic configuration diagram of an absorption refrigerator showing Example 1 of an absorption refrigerator regenerator according to the present invention. It is a partially omitted front view of a regenerator for an absorption refrigerator. It is a partially omitted side view of a regenerator for an absorption refrigerator. It is an enlarged side view of the principal part. It is the sectional view on the AA line of FIG. It is an expanded side view of Example 2 of the regenerator for absorption refrigerators which concerns on this invention. It is a schematic block diagram of Example 3 of the regenerator for absorption refrigerators which concerns on this invention. FIG. 10 is a block diagram illustrating a control system according to a third embodiment. FIG. 10 is a block diagram illustrating a control system according to a fourth embodiment. FIG. 10 is a block diagram illustrating a control system according to a fifth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Regenerator 21 ... Mixed liquid pump 28 ... Regenerator main body 29 ... Plate (heat-transfer member)
32 ... Tray (liquid reservoir)
35 ... 1st spraying hole (1st liquid mixture supply part)
36 ... 2nd spraying hole (2nd liquid mixture supply part)
51 ... Temperature sensor (heat transfer efficiency drop detecting means)
53. Temperature comparison means (heat transfer efficiency decrease detection means)
54 ... Mixed liquid supply amount increasing means 61 ... First cooling water temperature sensor (heat transfer efficiency decrease detecting means)
62 ... 2nd cooling water temperature sensor (heat transfer efficiency fall detection means)
64 ... Temperature difference calculation means (heat transfer efficiency decrease detection means)
65 ... Temperature difference comparison means (heat transfer efficiency decrease detection means)
66... Liquid mixture supply amount increasing means 71... Absorbing liquid temperature sensor (heat transfer efficiency decrease detecting means)
72 ... Mixed liquid temperature sensor (heat transfer efficiency decrease detecting means)

Claims (6)

In the regenerator main body, a heat transfer member that passes a heating medium and has an outer surface formed as a heat transfer surface is provided, and a liquid mixture of an absorbing liquid and a refrigerant is formed on the heat transfer surface above the heat transfer member. In a regenerator for an absorption refrigeration machine that is provided with a liquid mixture supply unit that is supplied by natural flow to generate a refrigerant vapor by heating and boiling the liquid mixture,
The mixed liquid supply unit,
A liquid reservoir for storing the liquid mixture;
A first mixed liquid supply unit that is provided in the liquid reservoir part at a predetermined interval in a direction along the heat transfer surface and supplies the mixed liquid to the heat transfer surface in contact with the first liquid supply part;
The liquid reservoir portion is provided above the first liquid mixture supply portion, and a large amount of liquid mixture is supplied to the liquid reservoir portion so that the liquid mixture has a high depth in the liquid reservoir portion. A second liquid mixture supply unit that supplies the liquid mixture in contact with the heat transfer surface in addition to the liquid mixture from the first liquid mixture supply unit,
A regenerator for an absorption refrigerator characterized by comprising: In the absorption refrigerator regenerator according to claim 1,
The regenerator for an absorption chiller, wherein the heat transfer member is a plate having a vertical heat transfer surface, and a heating medium is flowed from the lower part to the upper part in the plate. In the absorption refrigerator regenerator according to claim 1,
A regenerator for an absorption refrigeration machine, wherein the heat transfer members extend in the horizontal direction and are arranged at intervals in the vertical direction, and the heating medium flows through the pipe from below to above. In the absorption refrigerator regenerator according to any one of claims 1, 2, and 3,
The first mixed liquid supply unit is configured to form a first spray hole at a predetermined interval in the longitudinal direction of the liquid reservoir, and the second mixed liquid supply unit is formed in the liquid reservoir. An absorption refrigerating machine regenerator configured by forming a second spray hole at a position above the first spray hole and in the horizontal direction in the middle of the first spray hole. In the absorption refrigerator regenerator according to any one of claims 1, 2, and 3,
The first mixed liquid supply unit is configured to form a first spray hole at a predetermined interval in the longitudinal direction of the liquid reservoir, and the second mixed liquid supply unit is formed in the liquid reservoir. A regenerator for an absorption refrigeration machine configured by forming a second spray hole at a position above the first spray hole and overlapping the first spray hole in the vertical direction. In the refrigerating machine for an absorption refrigerator according to any one of claims 1, 2, 3, 4, and 5,
A heat transfer efficiency decrease detecting means for detecting a decrease in heat transfer efficiency or more and outputting a liquid increase signal;
Absorption refrigeration comprising a mixed liquid supply amount increasing means for increasing a discharge amount of a mixed liquid pump for supplying a mixed liquid to a mixed liquid supply section in response to a liquid increase signal from the heat transfer efficiency decrease detecting means for a set time. Regenerator for machine.

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