Energy-saving air conditioner water cooling unit

Abstract

The invention discloses an energy-saving air conditioner water-cooling unit, and belongs to the technical field of air conditioning systems, the energy-saving air conditioner water-cooling unit comprises an evaporator and a condenser, the evaporator comprises a main shell, and a plurality of columns of heat exchange pipes and refrigerant distribution pipes which are vertically and alternately distributed are arranged between a first sealing partition plate and a second sealing partition plate in a penetrating mode; a centrifugal compressor is installed on one side of the top of the evaporator, and a flash tank is further installed between the evaporator and the condenser. And an oil return mechanism is mounted at the bottom between the evaporator and the centrifugal compressor. According to the heat exchanger, the multiple rows of heat exchange pipes and the refrigerant distribution pipes are vertically and alternately distributed in the main shell, so that vaporific refrigerants sprayed out of the refrigerant distribution pipes can be in full contact with the adjacent dense heat exchange pipes, and the refrigerants can rapidly absorb heat of chilled water in the heat exchange pipes; and the refrigerant is evaporated in the main shell to form refrigerant gas, so that the overall heat exchange efficiency and heat exchange quality are further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning systems, and in particular relates to an energy-saving air-conditioning water-cooling unit. Background Art

[0002] Air conditioning water chiller is a common air conditioning system that uses water as a refrigerant to absorb heat and cool the air. Air conditioning water chiller absorbs and removes heat by circulating water. It consists of 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. Then, the compressor compresses the water vapor into a high-temperature and high-pressure gas, which releases heat and cools into a liquid through the condenser. Finally, the water is pumped back to the cooling tower for recycling. Air conditioning water chillers are widely used in large commercial buildings, factories, hospitals, hotels and other places that require a lot of refrigeration. Due to its high refrigeration efficiency and strong adaptability, it is particularly suitable for occasions with large-scale refrigeration needs.

[0003] The evaporator is an important part of the air-conditioning water-cooling unit. The commonly used evaporators include dry evaporators, flooded shell and tube evaporators and falling film evaporators. In order to ensure the heat exchange capacity, most of the air-conditioning water-cooling units on the market currently use flooded shell and tube evaporators or falling film evaporators. In the actual working process of the flooded shell and tube evaporator, the refrigerant (refrigerant) filling volume in the shell is large, generally about 55-65% of the total volume of the shell, and the upper space is reserved for gas-liquid separation. Although the flooded shell and tube evaporator ensures the heat exchange capacity, the oil return is difficult and unstable, and a reliable separation system is required. Oil and oil return measures; when the falling film evaporator is in use, the refrigerant cools the water in the heat exchange tube by spraying and evaporating outside the tube. The heat exchange capacity is higher than the full liquid and dry high film evaporation heat exchange efficiency. However, the refrigerant is introduced from the top and is evenly distributed on the surface of the heat exchange tube through the liquid distribution device, and then flows downward under the action of gravity. Since the heat exchange tubes are densely arranged, the sprayed refrigerant evaporates relatively quickly when passing through the heat exchange tubes from top to bottom, which results in the dense heat exchange tubes in the middle and lower layers often unable to fully contact the refrigerant, which in turn affects the overall heat exchange efficiency and heat exchange quality. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide an energy-saving air-conditioning water-cooling unit.

[0005] The technical solution adopted to solve the above technical problems is: an energy-saving air-conditioning water-cooling unit, including an evaporator and a condenser, the evaporator including a main shell, a first sealing baffle and a second sealing baffle are fixedly installed at the centers of both ends of the main shell, and multiple rows of vertically and alternately distributed heat exchange tubes and refrigerant distribution tubes are respectively passed through the first sealing baffle and the second sealing baffle. By vertically and alternately distributing the multiple rows of heat exchange tubes and refrigerant distribution tubes in the main shell, the mist refrigerant sprayed from the refrigerant distribution tube can fully contact 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 tube and evaporate in the main shell to form refrigerant gas, thereby further improving the overall heat exchange efficiency and heat exchange quality, so that the chilled water in the heat exchange tube can be quickly cooled down, and the cooled low-temperature chilled water will enter the water outlet hood, and then be sent to the indoor fan coil unit and other terminals through the chilled water outlet pipe for air conditioning refrigeration.

[0006] A centrifugal compressor is installed on one side of the top of the evaporator to absorb the refrigerant vapor generated in the evaporator. The vapor is compressed to form a high-temperature and high-pressure refrigerant gas, which is then sent to the condenser. 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, and the oil return mechanism is responsible for pumping the lubricating oil at the bottom of the evaporator back to the condenser, so that the lubricating oil and the refrigerant liquid are fully mixed in a circulating state; A main controller is also installed on the top of the evaporator. The main controller is used for integrated control of the entire water cooling unit. At the same time, the main controller can also establish remote control contact with the remote background through wireless signals, so that the background operator can remotely control the relevant operating parameters of the water cooling unit.

[0007] Furthermore, an exhaust port and an oil return port are respectively provided at the center of the top and bottom of the main shell, and an isolation cover and a water inlet cover are installed in sequence on one side of the main shell. The other end of the water inlet cover is connected to a chilled water inlet pipe, and the rear side walls of the isolation cover and the water inlet cover are both provided with penetrating guide holes.

[0008] Through the above technical scheme, the refrigerant will form refrigerant gas after evaporating and absorbing heat in the main shell. Subsequently, under the action of the centrifugal compressor, the refrigerant gas will be sucked into the centrifugal compressor through the exhaust port at the top and subjected to subsequent compression processing; in addition, during the operation of the evaporator, the chilled water required for air conditioning refrigeration will enter the water inlet hood through the chilled water inlet pipe. Since there is a relatively sealed space in the water inlet hood, the chilled water entering the water inlet hood flows into multiple heat exchange tubes. After the refrigerant evaporates and absorbs heat in the main shell, the chilled water in the heat exchange tubes will become low-temperature chilled water with a lower temperature, and flow along the heat exchange tubes to the water outlet hood at the other end.

[0009] Furthermore, a sealing ring is fixedly connected to the inner wall side of the water inlet hood, and a sealing gasket is installed on one side of the sealing ring. In the working state, the other side of the sealing gasket is tightly pressed against the four sides of the isolation cover, and each of the refrigerant distribution pipes is threadedly connected to a sealing plug at one end away from the water inlet hood, by arranging a sealing ring and a sealing gasket on the inner wall side of the water inlet hood.

[0010] Through the above technical solution, after the evaporator is assembled, the sealing gasket can seal the four sides of the isolation cover, so that a relatively independent space can be formed inside the water inlet cover and the isolation cover, so that chilled water and refrigerant can be injected separately later, and both can work through independent channels without interfering with each other.

[0011] Furthermore, one end of the multiple rows of heat exchange tubes passes through the isolation cover and remains connected with the water inlet cover. Multiple rows of refrigerant distribution pipes are provided with multiple refrigerant spray holes, and the sprayed refrigerant can fully contact the heat exchange tubes at adjacent positions.

[0012] Through the above technical solution, since a small part of the heat exchange tube is located in the isolation cover, when the refrigerant enters the isolation cover, the refrigerant will absorb heat from this part of the heat exchange tube and produce a small amount of refrigerant gas. However, since the reaction time is relatively short, the small amount of refrigerant gas produced will follow the refrigerant into the refrigerant distribution pipe under pressure.

[0013] Furthermore, a water outlet cover is fixedly installed on the other side of the main shell, and one end of the water outlet cover is connected to a chilled water outlet pipe.

[0014] Through the above technical solution, the water outlet hood mainly plays the role of gathering and diverting water. The low-temperature chilled water after refrigeration and cooling will be concentrated in the water outlet hood and finally sent to the chilled water outlet pipe.

[0015] Furthermore, the condenser comprises a main structure, and a water inlet and a water outlet are respectively provided on one side of the main structure.

[0016] Through the above technical scheme, the condenser is mainly used for the rapid cooling of the refrigerant gas after evaporation. A tube-disc heat exchange elbow is arranged inside the condenser. The cooling water flowing out of the cooling tower will enter the main structure through the water inlet. After the high-temperature and high-pressure refrigerant gas compressed by the centrifugal compressor enters the main structure, the low-temperature cooling water will quickly absorb the heat of the refrigerant gas, so that the refrigerant gas condenses in the condenser, from gas to liquid, and releases a large amount of heat at the same time. The heat is absorbed by the cooling water in the tube-disc heat exchange elbow. After absorbing the heat, the low-temperature cooling water becomes cooling water with a higher temperature and is discharged from the water outlet, taking away the condensation heat in the condenser. Then the cooling water with a higher temperature will enter the roof cooling tower through the pipe, and then dissipate the heat, and finally discharge the heat to the outside. After the refrigerant is condensed, it becomes a medium-temperature and high-pressure refrigerant liquid.

[0017] Furthermore, the centrifugal compressor includes a fixed support fixed to the top of the evaporator, a main pump body is installed at one end of the fixed support, a driving motor for driving the main pump body is installed on the top of the fixed support, the air inlet of the main pump body is connected to an air inlet pipe connected to the exhaust port, and the air outlet of the main pump body is connected to an air duct connected to the condenser.

[0018] Through the above technical solution, during the working process, the driving motor will drive the centrifugal impeller in the main pump body to rotate at high speed through the output shaft. At this time, the refrigerant gas in the evaporator will be sucked into the main pump body, and then thrown out and compressed by the high-speed rotating impeller, turning into high-temperature and high-pressure refrigerant gas, and then sent to the condenser through the air duct.

[0019] Furthermore, the flash device includes a fixed bracket fixedly connected to the top of the evaporator, a flash tank is fixed on the fixed bracket, one side of the bottom end of the flash tank is connected to a refrigerant liquid collection pipe that is connected to the condenser, one side of the top of the flash tank is connected to a steam guide pipe that is connected to the air inlet pipe, the other side of the bottom end of the flash tank is connected to a refrigerator circulation pipe, a circulation pump is installed on the refrigerator circulation pipe, the other end of the refrigerator circulation pipe is connected to a transfer pipe, and the other end of the transfer pipe is connected to the guide hole.

[0020] Through the above technical scheme, when the medium-temperature and high-pressure refrigerant liquid enters the flash tank through the refrigerant liquid collection pipe, a small part of the refrigerant liquid will flash and become refrigerant vapor, and then the refrigerant vapor will return to the centrifugal compressor through the steam guide pipe for compression, while most of the refrigerant will be reduced in pressure through the throttle valve inside the flash tank, becoming a low-temperature and low-pressure refrigerant liquid, and then return to the evaporator through the refrigerator circulation pipe for the next round of circulation.

[0021] Furthermore, the oil return mechanism includes an oil return pipe with one end connected to the oil return port, the other end of the oil return pipe is connected to the air intake pipe, and an oil return pump is also installed on the oil return pipe.

[0022] Through the above technical solution, in order to protect and lubricate the compressor in the refrigeration system, lubricating oil will be mixed in the refrigerant liquid. Due to the different densities of the two, when it enters the evaporator, the refrigerant liquid will evaporate quickly, and the lubricating oil will gather at the bottom of the main shell. At this time, during the continuous operation process, the return oil pump will extract this part of the lubricating oil, and then send it into the intake pipe through the return oil pipe, so that it can be mixed with the refrigerant gas and enter the compressor, thereby realizing the oil return effect.

[0023] Furthermore, support frames are fixedly connected to both sides of the bottom of the evaporator and the condenser, which are used to support the evaporator and the condenser so that they maintain a fixed height from the ground.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention arranges multiple 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 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 to form refrigerant gas in the main shell, thereby further improving the overall heat exchange efficiency and heat exchange quality; (2) The present invention designs a simple oil return mechanism. In the evaporator, the lubricating oil will gather at the bottom of the main shell. At this time, during continuous operation, the oil return pump will extract this part of the lubricating oil and then send it into the intake pipe through the oil return pipe, so that it can be mixed with the refrigerant gas and enter the compressor, thereby realizing the oil return effect and further realizing the lubrication and protection of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a first perspective structural diagram of the present invention; Figure 2 It is a second viewing angle structural diagram of the present invention; Figure 3 It is a front view of the present invention; Figure 4 It is a structural schematic diagram of the centrifugal compressor of the present invention; Figure 5 It is a structural schematic diagram of the flasher of the present invention; Figure 6 It is a structural schematic diagram of the evaporator of the present invention; Figure 7 is a front view of the evaporator of the present invention; Figure 8 yes Figure 7 Middle AA section view; Fig. 9 yes Figure 8 A partial enlarged view of the middle A; Fig.10 It is a right side view of the evaporator of the present invention; Fig.11 yes Fig.10 Middle BB section view; Fig.12 yes Fig.11 A partial enlarged view of point B in the middle; Fig.13 This is a first-view structural diagram of the evaporator in the explosion state of the present invention; Fig.14 It is a structural diagram of the evaporator of the present invention in the explosion state from the second viewing angle.

[0026] Figure numerals: 1, evaporator; 101, main shell; 102, exhaust port; 103, oil return port; 104, first sealing baffle; 105, second sealing baffle; 106, isolation cover; 107, water inlet cover; 108, chilled water inlet pipe; 109, guide hole; 110, sealing ring; 111, sealing gasket; 112, heat exchange tube; 113, refrigerant distribution pipe; 114, refrigerant spray hole; 115, sealing plug; 116, water outlet cover; 117, chilled water outlet pipe; 2, condenser; 201, main body Structure; 202, water inlet; 203, water outlet; 3, centrifugal compressor; 301, fixed support; 302, main pump body; 303, drive motor; 304, air inlet pipe; 305, air guide pipe; 4, flasher; 401, fixed support; 402, flasher tank; 403, refrigerant liquid collecting pipe; 404, steam guide pipe; 405, refrigerator circulation pipe; 406, circulation pump; 407, transfer pipe; 5, oil return mechanism; 501, oil return pipe; 502, oil return pump; 6, main controller; 7, support frame. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figure 1-Figure 14 As shown, an energy-saving air-conditioning water-cooling unit of this embodiment includes an evaporator 1 and a condenser 2. The evaporator 1 includes a main shell 101. The centers of both ends of the main shell 101 are respectively fixedly installed with a first sealing partition 104 and a second sealing partition 105. A plurality of rows of heat exchange tubes 112 and refrigerant distribution tubes 113 are respectively passed through the first sealing partition 104 and the second sealing partition 105 in a vertical and alternating manner. By adopting a vertical and alternating arrangement of the plurality of rows of heat exchange tubes 112 and the refrigerant distribution tubes 113 in the main shell 101, The mist refrigerant sprayed out from the refrigerant distribution pipe 113 can fully contact with the densely packed heat collecting and exchanging pipes 112 at adjacent positions, so that the refrigerant can quickly absorb the heat of the chilled water in the heat exchanging pipes 112 and evaporate in the main shell 101 to form refrigerant gas, thereby further improving the overall heat exchange efficiency and heat exchange quality, so that the chilled water in the heat exchanging pipes 112 can be quickly cooled down, and the cooled low-temperature chilled water will enter the water outlet hood 116, and then be sent to the indoor fan coil unit and other terminals through the chilled water outlet pipe 117 for air conditioning refrigeration.

[0029] like Figure 6-Figure 7As shown, an exhaust port 102 and an oil return port 103 are respectively provided at the top and bottom centers of the main shell 101, and an isolation cover 106 and a water inlet cover 107 are installed in sequence on one side of the main shell 101. The other end of the water inlet cover 107 is connected to a chilled water inlet pipe 108. A through guide hole 109 is opened on the rear side walls of the isolation cover 106 and the water inlet cover 107. The refrigerant will form refrigerant gas after evaporating and absorbing heat in the main shell 101. Subsequently, under the action of the centrifugal compressor 3, the refrigerant gas will be sucked into the centrifugal compressor 3 through the exhaust port 102 at the top, and then subjected to subsequent compression treatment.

[0030] Furthermore, in this embodiment, during the operation of the evaporator 1, the chilled water required for air conditioning refrigeration will enter the water inlet cover 107 through the chilled water inlet pipe 108. Since the water inlet cover 107 has a relatively sealed space, the chilled water entering the water inlet cover 107 flows into the multiple heat exchange tubes 112. The chilled water in the heat exchange tubes 112 will become low-temperature chilled water with a lower temperature after the refrigerant evaporates and absorbs heat in the main shell 101, and will flow along the heat exchange tubes 112 to the water outlet cover 116 at the other end.

[0031] like Figure 11-Figure 12 As shown, a sealing ring 110 is fixedly connected to the inner wall side of the water inlet cover 107, and a sealing gasket 111 is installed on one side of the sealing ring 110. In the working state, the other side of the sealing gasket 111 is tightly pressed against the four sides of the isolation cover 106, and each refrigerant distribution pipe 113 is threadedly connected to a sealing plug 115 at one end away from the water inlet cover 107. By arranging the sealing ring 110 and the sealing gasket 111 on the inner wall side of the water inlet cover 107, after the evaporator 1 is assembled, the sealing gasket 111 can seal the four sides of the isolation cover 106, so that relatively independent spaces can be formed in the water inlet cover 107 and the isolation cover 106, so that chilled water and refrigerant can be injected separately later, and both can work through independent channels without interfering with each other.

[0032] like Figure 13-Figure 14 As shown, one end of the multiple rows of heat exchange tubes 112 passes through the isolation cover 106 and remains connected with the water inlet cover 107. Multiple rows of refrigerant distribution pipes 113 are provided with multiple refrigerant spray holes 114, and the refrigerant sprayed therefrom will fully contact with the heat exchange tubes 112 at adjacent positions. Since a small part of the heat exchange tubes 112 is located in the isolation cover 106, when the refrigerant enters the isolation cover 106, the refrigerant will absorb heat from this part of the heat exchange tubes 112 and produce a small amount of refrigerant gas. However, since the reaction time is relatively short, the small amount of refrigerant gas produced will follow the refrigerant into the refrigerant distribution pipe 113 under the action of pressure.

[0033] A water outlet hood 116 is fixedly installed on the other side of the main shell 101, and one end of the water outlet hood 116 is connected to a chilled water outlet pipe 117. The water outlet hood 116 mainly plays the role of gathering water and guiding flow. The low-temperature chilled water after refrigeration and cooling will be concentrated in the water outlet hood 116 and finally sent to the chilled water outlet pipe 117.

[0034] like Figure 1-Figure 3 As shown, the condenser 2 includes a main structure 201, and a water inlet 202 and a water outlet 203 are respectively provided on one side of the main structure 201. The condenser 2 is mainly used for rapid cooling of the refrigerant gas after evaporation. A tube-disc heat exchange elbow is provided inside the condenser 2. The cooling water flowing out of the cooling tower will enter the main structure 201 through the water inlet 202. After the high-temperature and high-pressure refrigerant gas compressed by the centrifugal compressor 3 enters the main structure 201, the low-temperature cooling water will quickly absorb the heat of the refrigerant gas, so that the refrigerant gas condenses in the condenser 2, from gas to liquid, and releases a large amount of heat at the same time. The heat is absorbed by the cooling water in the tube-disc heat exchange elbow. After absorbing the heat, the low-temperature cooling water becomes cooling water with a higher temperature and is discharged from the water outlet 203, taking away the condensation heat in the condenser 2. Then the high-temperature cooling water will enter the roof cooling tower through the pipeline, and then dissipate the heat, and finally discharge the heat to the outdoors. After the refrigerant is condensed, it becomes a medium-temperature and high-pressure refrigerant liquid.

[0035] like Figure 1-Figure 5 As shown, a centrifugal compressor 3 is installed on one side of the top of the evaporator 1 for sucking the refrigerant vapor generated in the evaporator 1. The vapor is compressed to form a high-temperature and high-pressure refrigerant gas, which is then sent to the condenser 2. The centrifugal compressor 3 includes a fixed support 301 fixed to 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 of the main pump body 302 is connected to an air inlet pipe 304 connected to the exhaust port 102, and an air outlet of the main pump body 302 is connected to an air guide pipe 305 connected to the condenser 2. During operation, the driving motor 303 drives the centrifugal impeller in the main pump body 302 to rotate at a high speed through the output shaft. At this time, the refrigerant gas in the evaporator 1 is sucked into the main pump body 302, and then thrown out and compressed by the high-speed rotating impeller to become a high-temperature and high-pressure refrigerant gas, which is then sent to the condenser 2 through the air guide pipe 305.

[0036] like Figure 4-Figure 5As shown, a flasher 4 is also installed between the evaporator 1 and the condenser 2; the flasher 4 includes a fixed bracket 401 fixedly connected to the top of the evaporator 1, a flasher tank 402 is fixed on the fixed bracket 401, a refrigerant liquid collecting pipe 403 which is connected to the condenser 2 is connected to one side of the bottom end of the flasher tank 402, a steam guide pipe 404 which is connected to the air inlet pipe 304 is connected to one side of the top of the flasher tank 402, a refrigerator circulation pipe 405 is connected to the other side of the bottom end of the flasher tank 402, a circulation pump 406 is installed on the refrigerator circulation pipe 405, and the other side of the refrigerator circulation pipe 405 is connected to the refrigerant liquid collecting pipe 403 which is connected to the condenser 2. One end is connected to a transfer tube 407, and the other end of the transfer tube 407 is connected to the guide hole 109. When the medium-temperature and high-pressure refrigerant liquid enters the flash tank 402 through the refrigerant liquid collecting tube 403, a small part of the refrigerant liquid will flash and become refrigerant vapor, and then the refrigerant vapor will return to the centrifugal compressor 3 through the steam guide tube 404 for compression, while most of the refrigerant will be reduced in pressure through the throttle valve inside the flash tank 402, becoming a low-temperature and low-pressure refrigerant liquid, and then return to the evaporator 1 through the refrigerator circulation tube 405 for the next round of circulation.

[0037] like Figure 5 As shown, 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 of 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 includes an oil return pipe 501 connected to the oil return port 103 at one end, and the other end of the oil return pipe 501 is connected to the air inlet pipe 304. An oil return pump 502 is also installed on the oil return pipe 501. In order to protect and lubricate the compressor in the refrigeration system, the refrigerant liquid will be mixed with the lubricating oil. Due to the different densities of the two, when it enters the evaporator 1, the refrigerant liquid will evaporate quickly, and the lubricating oil will gather at the bottom of the main shell 101. At this time, during the continuous working process, the oil return pump 502 will extract this part of the lubricating oil, and then send it to the air inlet pipe 304 through the oil return pipe 501, so that it can be mixed with the refrigerant gas and enter the compressor, thereby realizing the oil return effect.

[0038] A main controller 6 is also installed on the top of the evaporator 1. The main controller 6 is used for integrated control of the entire water cooling unit. At the same time, the main controller 6 can also establish a remote control connection with the remote background through wireless signals, so that the background operator can remotely control the relevant operating parameters of the water cooling unit.

[0039] Support frames 7 are fixedly connected to both sides of the bottom of the evaporator 1 and the condenser 2, and are used to support the evaporator 1 and the condenser 2 so as to maintain a fixed height from the ground.

[0040] Furthermore, in this embodiment, since the condenser 2 and the flasher 4 are existing mature equipment, their specific internal structures are not shown in the figure.

[0041] The working principle of this embodiment is as follows: when the unit is working, the chilled water will enter the water inlet cover 107 through the chilled water inlet pipe 108, and then the chilled water will flow into the multiple heat exchange tubes 112. At the same time, the low-temperature and low-pressure refrigerant liquid will enter the isolation cover 106 through the guide hole 109. Under the action of pressure, the refrigerant liquid will enter the refrigerant distribution pipe 113. Since multiple refrigerant distribution pipes 113 are provided with multiple refrigerant spray holes 114, the mist sprayed from the multiple refrigerant spray holes 114 is The refrigerant can fully contact with the adjacent heat exchange tube 112, so that the refrigerant can quickly absorb the heat of the chilled water in the heat exchange tube 112 and evaporate in the main shell 101 to form refrigerant gas. After the refrigerant evaporates and absorbs heat in the main shell 101, the chilled water in the heat exchange tube 112 will become low-temperature chilled water with a lower temperature, and flow along the heat exchange tube 112 to the water outlet cover 116 at the other end, and then be sent to the indoor fan coil and other terminals through the chilled water outlet pipe 117 for air conditioning and refrigeration; The refrigerant gas in the evaporator 1 is sucked into the main pump body 302, and then thrown out and compressed by the high-speed rotating impeller to become a high-temperature and high-pressure refrigerant gas, and then sent to the condenser 2 through the air guide pipe 305. The low-temperature cooling water in the condenser 2 will quickly absorb the heat of the refrigerant gas, causing the refrigerant gas to condense in the condenser 2 and become a medium-temperature and high-pressure refrigerant liquid. Afterwards, the medium-temperature and high-pressure refrigerant liquid will enter the flash tank 402 through the refrigerant liquid collecting pipe 403. At this time, a small part of the refrigerant liquid will flash and become refrigerant vapor. Then the refrigerant vapor will return to the centrifugal compressor 3 through the steam guide pipe 404 for compression, while most of the refrigerant will be reduced in pressure through the throttle valve inside the flash tank 402, becoming a low-temperature and low-pressure refrigerant liquid, and then return to the evaporator 1 through the refrigerator circulation pipe 405 for the next round of circulation.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An energy-saving air-conditioning water-cooling unit, comprising an evaporator (1) and a condenser (2), characterized in that: The evaporator (1) comprises a main shell (101), wherein a first sealing baffle (104) and a second sealing baffle (105) are fixedly mounted at the centers of both ends of the main shell (101), and a plurality of rows of heat exchange tubes (112) and refrigerant distribution tubes (113) vertically and alternately distributed are respectively passed through the first sealing baffle (104) and the second sealing baffle (105); A centrifugal compressor (3) is installed on one side of the top of the evaporator (1) for sucking refrigerant vapor generated in the evaporator (1). The vapor is compressed to form high-temperature and high-pressure refrigerant gas, which is then sent to the condenser (2). A flash device (4) is also installed between the evaporator (1) and the condenser (2); An oil return mechanism (5) is installed at the bottom between the evaporator (1) and the centrifugal compressor (3), and the oil return mechanism (5) is responsible for pumping the lubricating oil at the bottom of the evaporator (1) back to the condenser (2), so that the lubricating oil and the refrigerant liquid are fully mixed in a circulating state; A main controller (6) is also installed on the top of the evaporator (1).

2. The energy-saving air-conditioning water-cooling unit according to claim 1, characterized in that: An exhaust port (102) and an oil return port (103) are respectively provided at the top and bottom centers of the main shell (101); an isolation cover (106) and a water inlet cover (107) are sequentially installed on one side of the main shell (101); the other end of the water inlet cover (107) is connected to a chilled water inlet pipe (108); and through-going guide holes (109) are provided on the rear side walls of the isolation cover (106) and the water inlet cover (107).

3. The energy-saving air-conditioning water-cooling unit according to claim 2, characterized in that: A sealing ring (110) is also fixedly connected to the inner wall side of the water inlet cover (107), and a sealing gasket (111) is installed on one side of the sealing ring (110). In the working state, the other side of the sealing gasket (111) is tightly pressed against the surrounding of the isolation cover (106), and one end of each refrigerant distribution pipe (113) away from the water inlet cover (107) is threadedly connected to a sealing plug (115).

4. The energy-saving air-conditioning water-cooling unit according to claim 3 is characterized in that: One end of each of the multiple rows of heat exchange tubes (112) passes through the isolation cover (106) and remains connected to the water inlet cover (107). Each of the multiple rows of refrigerant distribution tubes (113) is provided with a plurality of refrigerant spray holes (114), and the sprayed refrigerant will fully contact the heat exchange tubes (112) at adjacent positions.

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

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

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

8. The energy-saving air-conditioning water-cooling unit according to claim 7, characterized in that: The flasher (4) comprises a fixing bracket (401) fixedly connected to the top of the evaporator (1); a flasher tank (402) is fixed on the fixing bracket (401); one side of the bottom end of the flasher tank (402) is connected to a refrigerant liquid collecting pipe (403) intersecting the condenser (2); one side of the top of the flasher tank (402) is connected to a steam guide pipe (404) connected to an air inlet pipe (304); the other side of the bottom end of the flasher tank (402) is connected to a refrigerator circulation pipe (405); a circulation pump (406) is installed on the refrigerator circulation pipe (405); the other end of the refrigerator circulation pipe (405) is connected to a transfer pipe (407); the other end of the transfer pipe (407) is connected to the guide hole (109).

9. The energy-saving air-conditioning water-cooling unit according to claim 7, characterized in that: The oil return mechanism (5) comprises an oil return pipe (501) having one end connected to the oil return port (103), the other end of the oil return pipe (501) being connected to the air intake pipe (304), and an oil return pump (502) being installed on the oil return pipe (501).

10. The energy-saving air-conditioning water-cooling unit according to claim 1, characterized in that: Support frames (7) are fixedly connected to both sides of the bottom of the evaporator (1) and the condenser (2), and are used to support the evaporator (1) and the condenser (2) so that they maintain a fixed height from the ground.

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