CN119085047A

CN119085047A - Energy-saving air-conditioning water-cooling unit

Info

Publication number: CN119085047A
Application number: CN202411578154.9A
Authority: CN
Inventors: 顾红娟; 朱立群
Original assignee: Jingjiang Jiuzhou Air Conditioning Equipment Co ltd
Current assignee: Jingjiang Jiuzhou Air Conditioning Equipment Co ltd
Priority date: 2024-11-07
Filing date: 2024-11-07
Publication date: 2024-12-06

Abstract

The present invention discloses an energy-saving air-conditioning water-cooling unit, belonging to the technical field of air conditioning systems. The energy-saving air-conditioning water-cooling unit comprises an evaporator and a condenser. The evaporator comprises a main shell, and a plurality of rows of heat exchange tubes and refrigerant distribution tubes are respectively passed through between the first sealing partition and the second sealing partition; a centrifugal compressor is installed on one side of the top of the evaporator, and a flasher is also installed between the evaporator and the condenser; an oil return mechanism is installed at the bottom between the evaporator and the centrifugal compressor. The present invention arranges a plurality of rows of heat exchange tubes and refrigerant distribution tubes vertically and alternately in the main shell, so that the mist refrigerant sprayed from the refrigerant distribution tube can fully contact with the densely packed heat exchange tubes in adjacent positions, so that the refrigerant can quickly absorb the heat of the chilled water in the heat exchange tubes, and evaporate in the main shell to form refrigerant gas, thereby further improving the overall heat exchange efficiency and heat exchange quality.

Description

Energy-saving air conditioner water cooling unit

Technical Field

The invention belongs to the technical field of air conditioning systems, and particularly relates to an energy-saving air conditioner water cooling unit.

Background

Air conditioning water cooling units are a common type of air conditioning system that uses water as a refrigerant to absorb heat and cool air. The air-conditioning water cooling unit absorbs and removes heat through circulating water. It includes an evaporator, a compressor, a condenser and a cooling tower. In the evaporator, water flows through the cooling tower, absorbs heat and evaporates into water vapor. The compressor then compresses the water vapor into a high temperature, high pressure gas, releases heat through a condenser and cools into a liquid. Finally, the water is pumped back to the cooling tower for recycling. The air-conditioning water cooling unit is widely applied to places such as large commercial buildings, factories, hospitals, hotels and the like which need a large amount of refrigeration. The refrigerator has high refrigerating efficiency and strong adaptability, and is especially suitable for occasions with large-scale refrigeration requirements.

The evaporator is an important component part of an air-conditioning water-cooling unit, the types of the commonly used evaporator at present comprise a dry evaporator, a flooded shell-tube evaporator and a falling film evaporator, in order to ensure heat exchange capability, most of the air-conditioning water-cooling units in the market at present adopt the flooded shell-tube evaporator or the falling film evaporator, in the actual working process of the flooded shell-tube evaporator, the filling amount of refrigerant (refrigerant) in the shell is large, generally about 55-65% of the total volume in the shell, the upper reserved space is used for gas-liquid separation, the flooded shell-tube evaporator ensures heat exchange capability, but oil return is difficult and unstable, reliable oil separation and oil return measures are required, and in order to ensure the use of the falling film evaporator, the refrigerant cools water in a heat exchange tube in a spray evaporation manner outside the tube, and has higher heat exchange efficiency than the flooded and dry high-film evaporation heat exchange efficiency, but because the refrigerant is introduced from the top, uniformly distributed on the surface of the heat exchange tube through a liquid distribution device, then flows downwards under the action of gravity, and the heat exchange efficiency is often influenced by the relatively high heat exchange efficiency of the refrigerant passing through the heat exchange tube layer from top to bottom when the sprayed heat exchange tube is in a relatively high-down contact with the heat exchange tube.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an energy-saving air conditioner water cooling unit.

The technical scheme includes that the energy-saving air conditioner water cooling unit comprises an evaporator and a condenser, the evaporator comprises a main shell, a first sealing partition plate and a second sealing partition plate are respectively and fixedly arranged at the centers of two ends of the main shell, a plurality of rows of heat exchange pipes and refrigerant distribution pipes which are vertically and alternately distributed are respectively penetrated between the first sealing partition plate and the second sealing partition plate, the heat exchange pipes and the refrigerant distribution pipes in the plurality of rows are vertically and alternately distributed in the main shell, vaporific refrigerant sprayed out of the refrigerant distribution pipes can be fully contacted with heat exchange pipes which are densely arranged at adjacent positions, so that the refrigerant can quickly absorb heat of chilled water in the heat exchange pipes and evaporate to form refrigerant gas in the main shell, the overall heat exchange efficiency and heat exchange quality are further improved, chilled water in the heat exchange pipes can be quickly cooled, low-temperature chilled water after cooling can enter a water outlet cover, and then the chilled water is sent to the tail ends of an indoor cooling fan coil and the like through a chilled water outlet pipe for air conditioning.

A centrifugal compressor is arranged on one side of the top of the evaporator and used for sucking refrigerant steam generated in the evaporator, the steam is compressed to form high-temperature and high-pressure refrigerant gas and the high-temperature and high-pressure refrigerant gas is sent into a condenser, and a flash evaporator is arranged between the evaporator and the condenser;

An oil return mechanism is arranged at the bottom between the evaporator and the centrifugal compressor and is responsible for pumping lubricating oil at the bottom in the evaporator back to the condenser so that the lubricating oil and the refrigerant liquid are fully mixed in a circulating state;

the top of the evaporator is also provided with a main controller, the main controller is used for integrated control of the whole water-cooling unit, and meanwhile, the main controller can also establish remote control connection with a remote background through wireless signals, so that a background operator can remotely control related operation parameters of the water-cooling unit.

Further, the top and bottom centers of the main casing are respectively provided with an exhaust port and an oil return port, one side of the main casing is sequentially provided with an isolation cover and a water inlet cover, the other end of the water inlet cover is connected with a chilled water inlet pipe, and the rear side walls of the isolation cover and the water inlet cover are respectively provided with a penetrating diversion hole.

According to the technical scheme, the refrigerant can form refrigerant gas after evaporating and absorbing heat in the main shell, the refrigerant gas can be sucked by the centrifugal compressor through the exhaust port at the top and is subjected to subsequent compression treatment under the action of the centrifugal compressor, in addition, in the working process of the evaporator, chilled water required by air conditioner refrigeration can enter the water inlet cover through the chilled water inlet pipe, the chilled water entering the water inlet cover flows into the plurality of heat exchange pipes due to the relatively sealed space in the water inlet cover, and the chilled water in the heat exchange pipes can become low-temperature chilled water with lower temperature after evaporating and absorbing heat of the refrigerant in the main shell and flows into the water outlet cover at the other end along the heat exchange pipes.

Further, still fixedly connected with sealing ring on the inner wall side of cover that intakes, sealing pad is installed to one side of sealing ring, and under the operating condition, the opposite side of sealing pad offsets tightly with the surrounding of cage, every the equal threaded connection of one end that the cover was intaked is kept away from to refrigerant distributing pipe has sealed end cap, through setting up sealing ring and sealing pad on the inner wall side of cover that intakes.

Through above-mentioned technical scheme, the evaporimeter is after the equipment is accomplished, and sealed pad can be sealed to the cage all around to make into water cover and cage can form independent space relatively, so that follow-up injection chilled water and refrigerant respectively, both can work through independent passageway, mutually noninterfere.

Further, one ends of the heat exchange tubes in multiple rows penetrate through the isolation cover and are communicated with the water inlet cover, the refrigerant distribution tubes in multiple rows are provided with multiple refrigerant spraying holes, and the refrigerant sprayed by the refrigerant spraying holes can be fully contacted with the heat exchange tubes in adjacent positions.

According to the technical scheme, as a small part of the heat exchange tubes are positioned in the isolation cover, after the refrigerant enters the isolation cover, the refrigerant absorbs heat to the part of the heat exchange tubes and generates a small amount of refrigerant gas, but due to the short reaction time, the generated small amount of refrigerant gas can follow the refrigerant to enter the refrigerant distribution tube under the action of pressure.

Further, a water outlet cover is fixedly arranged on the other side of the main shell, and one end of the water outlet cover is connected with a chilled water outlet pipe.

Through the technical scheme, the water outlet cover mainly plays a role in water gathering and guiding, and low-temperature chilled water after refrigeration and cooling can be gathered in the water outlet cover and finally sent to the chilled water outlet pipe.

Further, the condenser comprises a main body structure, and a water inlet and a water outlet are respectively arranged on one side of the main body structure.

Through the technical scheme, the condenser is mainly used for rapidly cooling the evaporated refrigerant gas, the pipe disc type heat exchange bent pipe is arranged in the condenser, cooling water flowing out of the cooling tower enters the main structure through the water inlet, after the refrigerant gas subjected to compression treatment by the centrifugal compressor enters the main structure, low-temperature cooling water rapidly absorbs heat of the refrigerant gas, the refrigerant gas is condensed in the condenser, the gas is changed into liquid, a large amount of heat is emitted, the heat is absorbed by the cooling water in the pipe disc type heat exchange bent pipe, the low-temperature cooling water absorbs heat and becomes higher-temperature cooling water, the cooling water is discharged from the water outlet, condensation heat in the condenser is taken away, then the higher-temperature cooling water enters the cooling tower through the pipe, heat is dissipated, finally, the heat is discharged to the outside, and the refrigerant is condensed to become medium-high-pressure refrigerant liquid.

Further, the centrifugal compressor comprises a fixed support fixed at the top of the evaporator, a main pump body is installed at one end of the fixed support, a driving motor used for driving the main pump body to work is installed at the top of the fixed support, an air inlet of the main pump body is connected with an air inlet pipe communicated with an air outlet, and an air guide pipe communicated with the condenser is connected with an air outlet of the main pump body.

Through the technical scheme, in the working process, the driving motor drives the centrifugal impeller in the main pump body to rotate at a high speed through the output shaft, at the moment, the refrigerant gas in the evaporator can be sucked into the main pump body and then thrown out and compressed by the impeller rotating at a high speed to become high-temperature and high-pressure refrigerant gas, and then the refrigerant gas is sent into the condenser through the air duct.

Further, the flash tank comprises a fixed support fixedly connected to the top of the evaporator, a flash tank is fixed on the fixed support, one side of the bottom end of the flash tank is connected with a refrigerant liquid collecting pipe through which a condenser is communicated, one side of the top of the flash tank is connected with a steam guide pipe communicated with an air inlet pipe, the other side of the bottom end of the flash tank is connected with a refrigerator circulating pipe, a circulating pump is arranged on the refrigerator circulating pipe, the other end of the refrigerator circulating pipe is connected with a transfer pipe, and the other end of the transfer pipe is connected with a guide hole.

Through the technical scheme, after the medium-temperature high-pressure refrigerant liquid enters the flash tank through the refrigerant liquid collecting pipe, a small part of the refrigerant liquid can flash to become refrigerant vapor, then the refrigerant vapor can return to the centrifugal compressor again through the vapor guide pipe to be compressed, and most of the refrigerant can be depressurized through the throttle valve in the flash tank to become low-temperature low-pressure refrigerant liquid, and then the refrigerant liquid returns to the evaporator through the circulation pipe of the refrigerator to be circulated in the next round.

Further, the oil return mechanism comprises an oil return pipe with one end connected with the oil return port, the other end of the oil return pipe is communicated with the air inlet pipe, and an oil return pump is further arranged on the oil return pipe.

Through above-mentioned technical scheme, in order to protect and lubricate the compressor in refrigerating system, can mix lubricating oil in the refrigerant liquid, because both densities are different, consequently when it gets into in the evaporimeter, refrigerant liquid can evaporate fast, and lubricating oil can gather in main casing bottom, at this moment, in continuous operation in-process, returns oil pump and can extract this part lubricating oil, then sends into the intake pipe again through returning oil pipe, makes it can mix with refrigerant gas, gets into the compressor to realize the oil return effect.

Further, the two sides of the bottom of the evaporator and the bottom of the condenser are fixedly connected with supporting frames which are used for supporting the evaporator and the condenser to keep a fixed height with the ground.

The invention has the advantages that (1) the multi-row heat exchange tubes and the refrigerant distribution tubes are vertically and alternately distributed in the main shell, so that vaporous refrigerant sprayed out of the refrigerant distribution tubes can be fully contacted with the heat exchange tubes at adjacent positions, the refrigerant can quickly absorb heat of chilled water in the heat exchange tubes and evaporate in the main shell to form refrigerant gas, and the integral heat exchange efficiency and the heat exchange quality are further improved, and (2) the oil return mechanism is designed to be simple, lubricating oil is gathered at the bottom of the main shell, at the moment, in the continuous working process, the oil return pump can extract part of lubricating oil, and then the lubricating oil is sent into the air inlet tube through the oil return tube, so that the lubricating oil can be mixed with the refrigerant gas and enter the compressor, thereby realizing the oil return function and further realizing the lubrication and protection of the compressor.

Drawings

FIG. 1 is a first view block diagram of the present invention;

FIG. 2 is a second view angle block diagram of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a schematic view of the structure of the centrifugal compressor of the present invention;

FIG. 5 is a schematic diagram of the structure of the flash memory device of the present invention;

FIG. 6 is a schematic view of the structure of the evaporator of the present invention;

FIG. 7 is a front view of the evaporator of the invention;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;

FIG. 9 is an enlarged view of a portion of FIG. 8 at A;

FIG. 10 is a right side view of the evaporator of the invention;

FIG. 11 is a cross-sectional view taken along B-B in FIG. 10;

FIG. 12 is a partial enlarged view at B in FIG. 11;

FIG. 13 is a view of the first view angle of the construction of the evaporator of the invention in an exploded condition;

fig. 14 is a view showing a construction of a second view angle of the explosion state of the evaporator according to the present invention.

The device comprises a reference numeral 1, an evaporator, 101, a main shell, 102, an exhaust port, 103, an oil return port, 104, a first sealing baffle, 105, a second sealing baffle, 106, an isolation cover, 107, a water inlet cover, 108, a chilled water inlet pipe, 109, a diversion hole, 110, a sealing ring, 111, a sealing gasket, 112, a heat exchange pipe, 113, a refrigerant distribution pipe, 114, a refrigerant spraying hole, 115, a sealing plug, 116, a water outlet cover, 117, a chilled water outlet pipe, 2, a condenser, 201, a main structure, 202, a water inlet, 203, a water outlet, 3, a centrifugal compressor, 301, a fixed support, 302, a main pump, 303, a driving motor, 304, an air inlet pipe, 305, an air guide pipe, 4, a flash tank, 401, a fixed support, 402, a flash tank, 403, a refrigerant liquid collecting pipe, 404, a steam guide pipe, 405, a refrigerator, 406, a circulating pump, 407, a transfer pipe, 5, an oil return mechanism, 501, an oil return pipe, 502, an oil return pump, 6, a device, 7 and a support frame.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1-14, an energy-saving air-conditioning water-cooling unit of the present embodiment includes an evaporator 1 and a condenser 2, where the evaporator 1 includes a main housing 101, a first sealing partition plate 104 and a second sealing partition plate 105 are respectively and fixedly installed in the centers of two ends of the main housing 101, a plurality of columns of heat exchange tubes 112 and refrigerant distribution tubes 113 are respectively and vertically and alternately distributed between the first sealing partition plate 104 and the second sealing partition plate 105, and by adopting the columns of heat exchange tubes 112 and the refrigerant distribution tubes 113 in the main housing 101 in a vertical and alternately distributed manner, a vaporous refrigerant sprayed by the refrigerant distribution tubes 113 can fully contact with heat collecting tubes 112 densely arranged at adjacent positions, so that the refrigerant can quickly absorb heat of cooling water in the heat exchange tubes 112 and evaporate in the main housing 101 to form refrigerant gas, thereby further improving overall heat exchange efficiency and heat exchange quality, the cooling water in the heat exchange tubes 112 can be quickly cooled, the cooled low-temperature cooling water can enter a water outlet cover 116, and then be sent to the tail ends of an indoor fan coil through a water outlet tube 117 for air-conditioning.

As shown in fig. 6-7, the top and bottom centers of the main casing 101 are respectively provided with an air outlet 102 and an oil return opening 103, one side of the main casing 101 is sequentially provided with an isolation cover 106 and a water inlet cover 107, the other end of the water inlet cover 107 is connected with a chilled water inlet pipe 108, the rear side walls of the isolation cover 106 and the water inlet cover 107 are respectively provided with a through diversion hole 109, the refrigerant can form refrigerant gas after evaporating and absorbing heat in the main casing 101, and the refrigerant gas can be sucked by the centrifugal compressor 3 through the air outlet 102 at the top under the action of the centrifugal compressor 3 and is subjected to subsequent compression treatment.

Further, in the working process of the evaporator 1, chilled water required by air conditioning refrigeration enters the water inlet cover 107 through the chilled water inlet pipe 108, and the chilled water entering the water inlet cover 107 flows into the plurality of heat exchange tubes 112 due to the relatively sealed space in the water inlet cover 107, and the chilled water in the heat exchange tubes 112 is evaporated and absorbed by the refrigerant in the main housing 101, becomes low-temperature chilled water with lower temperature, and flows into the water outlet cover 116 at the other end along the heat exchange tubes 112.

As shown in fig. 11-12, a sealing ring 110 is fixedly connected to the inner wall side of the water inlet cover 107, a sealing gasket 111 is installed on one side of the sealing ring 110, in a working state, the other side of the sealing gasket 111 abuts against the periphery of the isolation cover 106, one end of each refrigerant distributing pipe 113, which is far away from the water inlet cover 107, is connected with a sealing plug 115 in a threaded manner, after the assembly of the evaporator 1 is completed, the sealing gasket 111 can seal the periphery of the isolation cover 106 through the arrangement of the sealing ring 110 and the sealing gasket 111 on the inner wall side of the water inlet cover 107, so that relatively independent spaces can be formed in the water inlet cover 107 and the isolation cover 106, and then frozen water and refrigerant can be respectively injected into the space to work through independent channels, and the two can work without interference.

As shown in fig. 13-14, one end of each of the heat exchange tubes 112 penetrates through the isolation cover 106 and is kept through with the water inlet cover 107, the refrigerant distribution pipes 113 of the plurality of rows are provided with a plurality of refrigerant spraying holes 114, the sprayed refrigerant can fully contact with the heat exchange tubes 112 at adjacent positions, and as a small part of the heat exchange tubes 112 are positioned in the isolation cover 106, after the refrigerant enters the isolation cover 106, the refrigerant absorbs heat to the part of the heat exchange tubes 112 and generates a small amount of refrigerant gas, but as the reaction time is short, the generated small amount of refrigerant gas can enter the refrigerant distribution pipes 113 along with the refrigerant under the action of pressure.

The other side of the main shell 101 is fixedly provided with a water outlet cover 116, one end of the water outlet cover 116 is connected with a chilled water outlet pipe 117, the water outlet cover 116 mainly plays a role in water gathering and guiding, and low-temperature chilled water after refrigeration and temperature reduction can be gathered in the water outlet cover 116 and finally sent into the chilled water outlet pipe 117.

As shown in fig. 1-3, the condenser 2 includes a main structure 201, one side of the main structure 201 is provided with a water inlet 202 and a water outlet 203, the condenser 2 is mainly used for rapid cooling of the evaporated refrigerant gas, a pipe-disc type heat exchange elbow is arranged in the condenser 2, cooling water flowing out of the cooling tower enters the main structure 201 through the water inlet 202, after the high-temperature high-pressure refrigerant gas compressed by the centrifugal compressor 3 enters the main structure 201, the low-temperature cooling water rapidly absorbs heat of the refrigerant gas, so that the refrigerant gas is condensed in the condenser 2, becomes liquid from the gas, and simultaneously emits a large amount of heat, the heat is absorbed by the cooling water in the pipe-disc type heat exchange elbow, the low-temperature cooling water absorbs heat and becomes cooling water with higher temperature, and is discharged from the water outlet 203, condensation heat in the condenser 2 is taken away, then the cooling water with higher temperature enters the roof cooling tower through a pipe, heat dissipation is carried out, finally, the heat is discharged outside the room, and the refrigerant is condensed to become medium-high-pressure refrigerant liquid.

As shown in fig. 1 to 5, a centrifugal compressor 3 is installed at one side of the top of the evaporator 1, and is used for sucking the refrigerant vapor generated in the evaporator 1, the vapor is compressed to form high-temperature and high-pressure refrigerant gas, and the refrigerant gas is sent into the condenser 2, the centrifugal compressor 3 comprises a fixed support 301 fixed at the top of the evaporator 1, a main pump body 302 is installed at one end of the fixed support 301, a driving motor 303 for driving the main pump body 302 to work is installed at the top of the fixed support 301, an air inlet pipe 304 communicated with the air outlet 102 is connected to an air inlet of the main pump body 302, an air guide pipe 305 communicated with the condenser 2 is connected to an air outlet of the main pump body 302, during the working process, the driving motor 303 drives a centrifugal impeller in the main pump body 302 to rotate at a high speed through an output shaft, at this moment, the refrigerant gas in the evaporator 1 is sucked by the main pump body 302, is thrown out and compressed by the impeller rotating at a high speed, and becomes the high-temperature and high-pressure refrigerant gas, and is sent into the condenser 2 through the air guide pipe 305.

As shown in fig. 4-5, a flash tank 4 is further installed between the evaporator 1 and the condenser 2, the flash tank 4 comprises a fixed support 401 fixedly connected to the top of the evaporator 1, a flash tank 402 is fixed on the fixed support 401, one side of the bottom end of the flash tank 402 is connected with a refrigerant liquid collecting pipe 403 communicated with the condenser 2, one side of the top of the flash tank 402 is connected with a vapor guide pipe 404 communicated with an air inlet pipe 304, the other side of the bottom end of the flash tank 402 is connected with a refrigerator circulating pipe 405, a circulating pump 406 is installed on the refrigerator circulating pipe 405, the other end of the refrigerator circulating pipe 405 is connected with an adapter pipe 407, the other end of the adapter pipe 407 is connected with a guide hole 109, after a small part of medium-high-pressure refrigerant liquid enters the flash tank 402 through the refrigerant liquid collecting pipe 403, the refrigerant vapor returns to the centrifugal compressor 3 again through the vapor guide pipe 404 for compression, and most of refrigerant is depressurized through a throttle valve in the flash tank 402 to become low-temperature low-pressure refrigerant liquid, and then returns to the next circulation of the evaporator 1 through the refrigerator circulating pipe 405.

As shown in fig. 5, an oil return mechanism 5 is installed at the bottom between the evaporator 1 and the centrifugal compressor 3, the oil return mechanism 5 is responsible for pumping the lubricating oil at the bottom in the evaporator 1 back to the condenser 2 so that the lubricating oil and the refrigerant liquid are fully mixed in a circulating state, the oil return mechanism 5 comprises an oil return pipe 501 with one end connected with an oil return port 103, the other end of the oil return pipe 501 is communicated with an air inlet pipe 304, an oil return pump 502 is further installed on the oil return pipe 501, and in order to protect and lubricate the compressor in the refrigeration system, the refrigerant liquid is mixed with the lubricating oil, and because of different densities, the refrigerant liquid is quickly evaporated after entering the evaporator 1, the lubricating oil is accumulated at the bottom of the main shell 101, at this time, the oil return pump 502 can extract part of the lubricating oil in a continuous working process, and then is sent into the air inlet pipe 304 through the oil return pipe 501 so that the lubricating oil can be mixed with the refrigerant gas and enter the compressor, thereby realizing an oil return effect.

The top of the evaporator 1 is also provided with a main controller 6, the main controller 6 is used for integrated control of the whole water-cooling unit, and meanwhile, the main controller 6 can also establish remote control connection with a remote background through wireless signals, so that a background operator can remotely control relevant operation parameters of the water-cooling unit.

The two sides of the bottom of the evaporator 1 and the condenser 2 are fixedly connected with supporting frames 7 which are used for supporting the evaporator 1 and the condenser 2 to keep a fixed height with the ground.

Further, in this embodiment, since the condenser 2 and the flash vessel 4 belong to existing mature equipment, the specific internal structure thereof is not shown in the figure.

The working principle of this embodiment is as follows, when the unit works, chilled water will enter the water inlet cover 107 through the chilled water inlet pipe 108, then chilled water will flow into the plurality of heat exchange pipes 112, meanwhile, low temperature low pressure refrigerant liquid will enter the isolation cover 106 through the diversion hole 109, then the refrigerant liquid will enter the refrigerant distribution pipe 113 under the pressure effect, as the plurality of refrigerant spray holes 114 are all opened on the plurality of columns of refrigerant distribution pipes 113, the vaporific refrigerant sprayed by the plurality of refrigerant spray holes 114 can fully contact with the heat collecting pipes 112 close to adjacent positions, thereby the refrigerant can quickly absorb the heat of the chilled water in the heat exchange pipes 112, and evaporate in the main housing 101 to form refrigerant gas, the chilled water in the heat exchange pipes 112 will become low temperature chilled water with lower temperature after evaporating and absorbing heat of the refrigerant in the main housing 101, and flow into the water outlet cover 116 at the other end along the heat exchange pipes 112, then the tail ends of the indoor fan coil pipes 117 and the like through the chilled water outlet pipes for air conditioning;

the refrigerant gas in the evaporator 1 is sucked by the main pump body 302, is thrown out by the impeller rotating at a high speed and compressed to become high-temperature and high-pressure refrigerant gas, and is sent into the condenser 2 through the air duct 305, and the low-temperature cooling water in the condenser 2 can quickly absorb the heat of the refrigerant gas, so that the refrigerant gas is condensed in the condenser 2 to become medium-temperature and high-pressure refrigerant liquid;

thereafter, the medium-temperature and high-pressure refrigerant liquid enters the flash tank 402 through the refrigerant liquid collecting pipe 403, at this time, a small part of the refrigerant liquid is flashed to become refrigerant vapor, and then the refrigerant vapor returns to the centrifugal compressor 3 again through the vapor guide pipe 404 to be compressed, while a large part of the refrigerant is depressurized through the throttle valve in the flash tank 402 to become low-temperature and low-pressure refrigerant liquid, and then returns to the evaporator 1 through the refrigerant circulating pipe 405 to be circulated in the next round.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. An energy-saving air-conditioning water cooling unit comprises an evaporator (1) and a condenser (2), and is characterized in that the evaporator (1) comprises a main shell (101), a first sealing partition plate (104) and a second sealing partition plate (105) are respectively and fixedly arranged at the centers of two ends of the main shell (101), and a plurality of rows of heat exchange pipes (112) and refrigerant distribution pipes (113) which are vertically and alternately distributed are respectively penetrated between the first sealing partition plate (104) and the second sealing partition plate (105);

A centrifugal compressor (3) is arranged at one side of the top of the evaporator (1) and is used for sucking refrigerant steam generated in the evaporator (1), the steam is compressed to form high-temperature and high-pressure refrigerant gas and the high-temperature and high-pressure refrigerant gas is sent into a condenser (2), and a flash evaporator (4) is arranged between the evaporator (1) and the condenser (2);

an oil return mechanism (5) is arranged at the bottom between the evaporator (1) and the centrifugal compressor (3), and the oil return mechanism (5) is responsible for pumping lubricating oil at the bottom in the evaporator (1) back to the condenser (2) so that the lubricating oil and the refrigerant liquid are fully mixed in a circulating state;

The top of the evaporator (1) is also provided with a main controller (6).

2. The energy-saving air conditioner water cooling unit according to claim 1, wherein the top and bottom centers of the main housing (101) are respectively provided with an air outlet (102) and an oil return port (103), one side of the main housing (101) is sequentially provided with an isolation cover (106) and a water inlet cover (107), the other end of the water inlet cover (107) is connected with a chilled water inlet pipe (108), and the rear side walls of the isolation cover (106) and the water inlet cover (107) are respectively provided with a through guide hole (109).

3. The energy-saving air conditioner water cooling unit according to claim 2, wherein a sealing ring (110) is fixedly connected to the inner wall side of the water inlet cover (107), a sealing gasket (111) is installed on one side of the sealing ring (110), the other side of the sealing gasket (111) abuts against the periphery of the isolation cover (106) in a working state, and one end, far away from the water inlet cover (107), of each refrigerant distributing pipe (113) is connected with a sealing plug (115) through threads.

4. An energy-saving air-conditioning water-cooling unit according to claim 3, wherein one end of each of the plurality of rows of heat exchange tubes (112) penetrates through the isolation cover (106) and is kept through with the water inlet cover (107), each of the plurality of rows of refrigerant distribution tubes (113) is provided with a plurality of refrigerant spraying holes (114), and the sprayed refrigerant can fully contact with the heat exchange tubes (112) at adjacent positions.

5. The energy-saving air-conditioning water cooling unit according to claim 1, wherein a water outlet cover (116) is fixedly arranged on the other side of the main shell (101), and one end of the water outlet cover (116) is connected with a chilled water outlet pipe (117).

6. The energy-saving air-conditioning water-cooling unit according to claim 1, wherein the condenser (2) comprises a main structure (201), and a water inlet (202) and a water outlet (203) are respectively arranged on one side of the main structure (201).

7. The energy-saving air-conditioning water-cooling unit according to claim 2, wherein the centrifugal compressor (3) comprises a fixed support (301) fixed on the top of the evaporator (1), a main pump body (302) is installed at one end of the fixed support (301), a driving motor (303) for driving the main pump body (302) to work is installed on the top of the fixed support (301), an air inlet pipe (304) communicated with the air outlet (102) is connected to an air inlet of the main pump body (302), and an air duct (305) communicated with the condenser (2) is connected to an air outlet of the main pump body (302).

8. The energy-saving air-conditioning water cooling unit according to claim 7, wherein the flash evaporator (4) comprises a fixed support (401) fixedly connected to the top of the evaporator (1), a flash tank (402) is fixed on the fixed support (401), one side of the bottom end of the flash tank (402) is connected with a refrigerant liquid collecting pipe (403) communicated with the condenser (2), one side of the top of the flash tank (402) is connected with a steam guide pipe (404) communicated with the air inlet pipe (304), the other side of the bottom end of the flash tank (402) is connected with a refrigerator circulating pipe (405), a circulating pump (406) is mounted on the refrigerator circulating pipe (405), the other end of the refrigerator circulating pipe (405) is connected with a transfer pipe (407), and the other end of the transfer pipe (407) is connected with a guide hole (109).

9. The energy-saving air conditioner water cooling unit according to claim 7, wherein the oil return mechanism (5) comprises an oil return pipe (501) with one end connected with the oil return port (103), the other end of the oil return pipe (501) is communicated with the air inlet pipe (304), and an oil return pump (502) is further installed on the oil return pipe (501).

10. The energy-saving air-conditioning water cooling unit according to claim 1, wherein the two sides of the bottoms of the evaporator (1) and the condenser (2) are fixedly connected with supporting frames (7) for supporting the evaporator (1) and the condenser (2) to keep a fixed height with the ground.