Efficient direct-current variable-frequency refrigerating and heating module unit

Abstract

The utility model discloses an efficient direct-current variable-frequency refrigerating and heating module unit which comprises a case, a refrigerant circulating assembly and a water cooling assembly, wherein the refrigerant circulating assembly and the water cooling assembly are arranged in the case. The refrigerant circulation assembly comprises a compressor, an oil-gas separator, a four-way valve, a finned heat exchanger, a water-cooling heat exchange unit, a liquid storage tank, an electronic expansion valve, an enthalpy increasing valve, an integrated heat exchanger and a gas-liquid separator which are connected through pipelines. According to the air conditioner, the water cooling assembly is arranged, when the air conditioner is in a refrigeration mode, a refrigerant of the water cooling heat exchange unit is effectively cooled in a water cooling mode, the refrigeration effect is greatly improved, the air conditioner can adapt to the high-temperature environment, and economic benefits are obvious; water vapor can be prevented from corroding the finned heat exchanger, and the service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration and heating module units, and particularly relates to an efficient DC variable frequency refrigeration and heating module unit. Background Technique

[0002] There are already various refrigeration and heating integrated devices on the market at present. They have a refrigeration mode and a heating mode, and can realize the functions of refrigerating and heating air or liquid. However, the current designs of such devices are not reasonable enough. Generally speaking, in the refrigeration mode, only two heat exchangers of this kind of device are used as condensers, and these two heat exchangers are basically air-cooled heat exchangers. When the ambient temperature is too high, the condenser cannot cool the refrigerant in it well, which will lead to insufficient refrigeration effect at the end. It can be seen that the ambient temperature has a great influence on the device. Therefore, it is necessary to design an efficient refrigeration and heating unit. Content of the Utility Model

[0003] The purpose of the utility model is to provide, so as to solve the technical problems in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] An efficient DC variable frequency refrigeration and heating module unit, comprising:

[0006] A chassis and a refrigerant circulation component and a water cooling component arranged in the chassis;

[0007] An upper accommodation cavity and a lower accommodation cavity which are separated up and down are formed in the chassis. The upper accommodation cavity is separated into a first ventilation cavity and a second ventilation cavity by a partition board. An air outlet cylinder communicating the first ventilation cavity and the second ventilation cavity is arranged at the top of the chassis. A fan is arranged in the air outlet cylinder. A first air inlet communicating the first ventilation cavity and a second air inlet communicating the second ventilation cavity are arranged on the side surface of the chassis;

[0008] The refrigerant circulation component includes a compressor, an oil-gas separator, a four-way valve, a finned heat exchanger, a water-cooled heat exchange unit, a liquid storage tank, an electronic expansion valve, an enthalpy-increasing valve, an integrated heat exchanger and a gas-liquid separator connected by pipelines. Among them, the finned heat exchanger is arranged in the first ventilation cavity, the water-cooled heat exchange unit and the water cooling component are arranged in the second ventilation cavity, and the water cooling component can use cooling water to exchange heat with air to cool the water-cooled heat exchange unit; a first refrigerant flow channel, a second refrigerant flow channel and a heat exchange water flow channel that exchange heat with each other are arranged in the integrated heat exchanger. The two ends of the first refrigerant flow channel are respectively a first refrigerant port and a second refrigerant port, and the two ends of the second refrigerant flow channel are respectively a third refrigerant port and a fourth refrigerant port;

[0009] Among them, the air outlet of the compressor is connected to the air inlet of the oil-gas separator, the exhaust port of the oil-gas separator is connected to the first port of the four-way valve, the oil outlet of the oil-gas separator is connected to the suction port of the compressor, the second port of the four-way valve is connected to the fourth port of the four-way valve after passing through a finned heat exchanger, a water-cooled heat exchange unit, a liquid storage tank, an electronic expansion valve, a first refrigerant port, a first refrigerant flow path, and a second refrigerant port in sequence, the third port of the four-way valve is connected to the suction port of the compressor through the gas-liquid separator, one end of the enthalpy-increasing valve is connected to the pipeline between the first refrigerant port and the electronic expansion valve, and the other end is connected to the enthalpy-increasing port of the compressor after passing through a third refrigerant port, a second refrigerant flow path, and a fourth refrigerant port in sequence. The exhaust port of the oil-gas separator is also connected to the pipeline between the third port of the four-way valve and the gas-liquid separator through a bypass solenoid valve.

[0010] Preferably, the water cooling assembly includes a cooler, a water distributor, a water tank, and a cooling water pump. The cooler includes a water inlet end at the top and a water outlet end at the bottom. The water distributor is provided at the water inlet end. The cooler is used for heat exchange between the flowing cooling water and air. The water tank is arranged at the bottom of the cooler for receiving the cooling water flowing out from the water outlet end of the cooler. The water tank is connected to the input end of the cooling water pump, and the output end of the cooling water pump is connected to the water distributor. The water-cooled heat exchange unit is arranged in the cooler to perform heat exchange with the cooling water.

[0011] Preferably, a cooling water make-up valve, a cooling water drain valve, a heat exchange water inlet, and a heat exchange water outlet are provided on the chassis. The cooling water make-up valve and the cooling water drain valve are connected to the water tank. The heat exchange water inlet and the heat exchange water outlet are respectively connected to both ends of the heat exchange water flow path.

[0012] Preferably, the cooler includes a frame body and a plurality of water flow plates. The plurality of water flow plates are sequentially arranged in the frame body in the vertical direction. A plurality of water dripping holes are provided on each water flow plate so that the cooling water can flow from the uppermost water flow plate to the lowermost water flow plate in sequence. The water-cooled heat exchange unit includes a plurality of spiral finned heat exchange tubes. One spiral finned heat exchange tube is arranged between two adjacent water flow plates.

[0013] Preferably, the water flow plate is bent and formed into a first plate portion, a second plate portion, and a third plate portion connected in sequence. The first plate portion, the second plate portion, and the third plate portion enclose a water retaining space. Among them, the second plate portion is parallel to the horizontal plane, the included angle between the first plate portion and the second plate portion is 129°, and the included angle between the second plate portion and the third plate portion is 124°.

[0014] Preferably, a plurality of water dripping holes are arranged in sequence along the length direction of the water flow plate, and the water dripping holes are provided on the second plate portion.

[0015] Preferably, two coolers are provided, one of the coolers is fixedly arranged with the water tank, the other cooler is detachably arranged with the water tank, and the water-cooled heat exchange unit is arranged on the cooler fixedly arranged with the water tank.

[0016] Preferably, a cooling water filter is arranged in the water tank.

[0017] Preferably, the chassis is of a rectangular parallelepiped structure, the chassis has four side surfaces, the first air inlet is arranged on three adjacent side surfaces of the chassis, the second air inlet is arranged on the side surface of the chassis where the first air inlet is not arranged, and the finned heat exchanger is exposed in the first air inlet.

[0018] Preferably, a first filter is connected in series in the pipeline between the electronic expansion valve and the first refrigerant port, and a second filter is connected in series in the pipeline between the electronic expansion valve and the liquid storage tank.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging the water cooling assembly in the high-efficiency DC variable-frequency refrigeration and heating module unit of the present application, when in the refrigeration mode, the refrigerant of the water-cooled heat exchange unit is effectively cooled by the water cooling method, greatly improving the refrigeration effect, being able to adapt to high-temperature environments, with obvious economic benefits. In addition, the water cooling assembly, the water-cooled heat exchange unit and the finned heat exchanger are respectively arranged in two ventilation cavities, which can prevent the finned heat exchanger from being corroded by water vapor and greatly improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the high-efficiency DC variable-frequency refrigeration and heating module unit of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the high-efficiency DC variable-frequency refrigeration and heating module unit of the present utility model;

[0022] Figure 3 is a schematic horizontal sectional structural diagram of the high-efficiency DC variable-frequency refrigeration and heating module unit of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the finned heat exchanger of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the water cooling assembly and the water-cooled heat exchange unit of the present utility model;

[0025] Figure 6 is an exploded schematic diagram of the water cooling assembly and the water-cooled heat exchange unit of the present utility model;

[0026] Figure 7Schematic diagram of the structure of the water flow plate of the present utility model;

[0027] Figure 8 Schematic diagram of the component connection of the high-efficiency DC variable-frequency refrigeration and heating module unit of the present utility model;

[0028] Figure 9 Schematic diagram of the component connection in the refrigeration mode of the high-efficiency DC variable-frequency refrigeration and heating module unit in the embodiment of the present application;

[0029] Figure 10 Schematic diagram of the component connection in the heating mode of the high-efficiency DC variable-frequency refrigeration and heating module unit in the embodiment of the present application.

[0030] In the figure: 1. Chassis; 11. First ventilation cavity; 12. Second ventilation cavity; 13. First air inlet; 14. Second air inlet; 15. Air outlet duct; 151. Fan; 16. Cooling water make-up valve; 17. Cooling water drain valve; 18. Heat exchange water inlet; 19. Heat exchange water outlet; 111. Partition board; 112. Door panel; 21. Compressor; 211. Air outlet; 212. Suction port; 213. Enthalpy increase port; 22. Oil-gas separator; 221. Air inlet; 222. Exhaust port; 223. Oil outlet; 23. Four-way valve; 231. First port; 232. Second port; 233. Third port; 234. Fourth port; 24. Finned heat exchanger; 25. Water-cooled heat exchange unit; 251. Spiral finned heat exchange tube; 26. Liquid storage tank; 271. Electronic expansion valve; 272. Enthalpy-increasing valve; 28. Integrated heat exchanger; 281. First refrigerant flow channel; a. First refrigerant port; b. Second refrigerant port; 282. Second refrigerant flow channel; c. Third refrigerant port; d. Fourth refrigerant port; 283. Heat exchange water flow channel; 29. Gas-liquid separator; 30. Bypass solenoid valve; 4. Water cooling assembly; 41. Cooler; 411. Frame body; 412. Water flow plate; 4121. First plate part; 4122. Second plate part; 4124. Water dripping hole; 4123. Third plate part; 42. Water distributor; 43. Water tank; 431. Cooling water filter; 44. Cooling water pump. Detailed implementation manners

[0031] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present utility model as follows.

[0032] Please refer to simultaneously Figures 1-10 , this embodiment provides a high-efficiency DC variable-frequency refrigeration and heating module unit, including a chassis 1 and a refrigerant circulation assembly and a water cooling assembly 4 arranged in the chassis 1.

[0033] Among them, an upper accommodation cavity and a lower accommodation cavity which are separated up and down are formed in the chassis 1. The upper accommodation cavity is separated into a first ventilation cavity 11 and a second ventilation cavity 12 by a partition plate 111. An air outlet cylinder 15 communicating the first ventilation cavity 11 and the second ventilation cavity 12 is arranged at the top of the chassis 1. A fan 151 is arranged in the air outlet cylinder 15. A first air inlet 13 communicating the first ventilation cavity 11 and a second air inlet 14 communicating the second ventilation cavity 12 are arranged on the side surface of the chassis 1. When the fan 151 works, air can be inhaled from the first air inlet 13 and the second air inlet 14. After the air flows through the first ventilation cavity 11 and the second ventilation cavity 12, it is discharged out of the chassis 1 from the air outlet cylinder 15.

[0034] The refrigerant circulation assembly forms a refrigerant circuit. Specifically, the refrigerant circulation assembly includes a compressor 21, an oil-gas separator 22, a four-way valve 23, a finned heat exchanger 24, a water-cooled heat exchange unit 25, a liquid storage tank 26, an electronic expansion valve 271, an enthalpy-increasing valve 272, an integrated heat exchanger 28 and a gas-liquid separator 29 which are connected by pipelines.

[0035] Among them, the finned heat exchanger 24 is arranged in the first ventilation cavity 11, so that heat exchange can be carried out with air in the first ventilation cavity 11. The water-cooled heat exchange unit 25 and the water cooling assembly 4 are arranged in the second ventilation cavity 12. The water cooling assembly 4 can use cooling water to exchange heat with air to cool the water-cooled heat exchange unit 25. In addition, the compressor 21, the oil-gas separator 22, the four-way valve 23, the liquid storage tank 26, the electronic expansion valve 271, the enthalpy-increasing valve 272, the integrated heat exchanger 28 and the gas-liquid separator 29 are all arranged in the lower accommodation cavity. As can be seen from the above, in this embodiment, by arranging the mutually separated first ventilation cavity 11 and the second ventilation cavity 12 to respectively install the finned heat exchanger 24 and the water-cooled heat exchange unit 25, it is possible to avoid the cooling water for heat exchange with the water-cooled heat exchange unit 25 from splashing onto the finned heat exchanger 24 and causing corrosion of the finned heat exchanger 24, and the service life of the finned heat exchanger 24 can be improved. The design is very reasonable.

[0036] To improve the heat exchange efficiency between the finned heat exchanger 24 and air, preferably, the chassis 1 of this embodiment is a rectangular parallelepiped structure. The chassis 1 has four side surfaces. The first air inlet 13 is arranged on three successively connected side surfaces of the chassis 1. The finned heat exchanger 24 is exposed in the first air inlet 13. The second air inlet 14 is arranged on the side surface of the chassis 1 where the first air inlet 13 is not provided. The water-cooled heat exchange unit 25 mainly exchanges heat with the cooling water of the water cooling assembly 4. Therefore, its demand for heat exchange with air is not large, that is, the area of the second air inlet 14 does not need to be too large. By arranging the first air inlet 13 as above, the contact area between the finned heat exchanger 24 and air can be increased, the air flow rate in the first ventilation cavity 11 can be increased, and the heat exchange efficiency of the finned heat exchanger 24 can be improved. The finned heat exchanger 24 is in a U-shaped structure to adapt to the layout position of the above-mentioned first air inlet 13. Among them, a door panel 112 is installed at the second air inlet 14. The door panel 112 can be movably opened and closed. A plurality of ventilation holes are penetrated through the door panel 112. Thereby, the aesthetics and practicability at the second air inlet 14 can be improved.

[0037] Among them, a first refrigerant flow channel 281, a second refrigerant flow channel 282 and a heat exchange water flow channel 283 for mutual heat exchange are arranged in the integrated heat exchanger 28. The heat exchange water flow channel 283 can pass through the water to be heat exchanged, so that the refrigeration or heating of the water can be realized. For the convenience of description, the two ends of the first refrigerant flow channel 281 are respectively a first refrigerant port a and a second refrigerant port b, and the two ends of the second refrigerant flow channel 282 are respectively a third refrigerant port c and a fourth refrigerant port d.

[0038] In this embodiment, among them, the air outlet 211 of the compressor 21 is communicated with the air inlet 221 of the oil-gas separator 22. The exhaust port 222 of the oil-gas separator 22 is communicated with the first port 231 of the four-way valve 23. The oil outlet 223 of the oil-gas separator 22 is communicated with the suction port 212 of the compressor 21. The second port 232 of the four-way valve 23 is successively communicated with the fourth port 234 of the four-way valve 23 after passing through the finned heat exchanger 24, the water-cooled heat exchange unit 25, the liquid storage tank 26, the electronic expansion valve 271, the first refrigerant port a, the first refrigerant flow channel 281 and the second refrigerant port b. The third port 233 of the four-way valve 23 is communicated with the suction port 212 of the compressor 21 through the gas-liquid separator 29. One end of the enthalpy-increasing valve 272 is communicated with the pipeline between the first refrigerant port a and the electronic expansion valve 271, and the other end is successively communicated with the enthalpy-increasing port 213 of the compressor 21 after passing through the third refrigerant port c, the second refrigerant flow channel 282 and the fourth refrigerant port d. The exhaust port 222 of the oil-gas separator 22 is also communicated with the pipeline between the third port 233 of the four-way valve 23 and the gas-liquid separator 29 through a bypass solenoid valve 30.

[0039] The cooling water circulation assembly forms a cooling water circuit. The cooling water circulation assembly can exchange heat with air to reduce the temperature of the cooling water. At the same time, the cooled cooling water contacts the refrigerant of the water-cooled heat exchange unit 25 to exchange heat with the refrigerant, so as to cool and liquefy the refrigerant. Specifically, the water cooling assembly 4 in this embodiment includes a cooler 41, a water distributor 42, a water tank 43 and a cooling water pump 44. The cooler 41 includes a water inlet end at the top and a water outlet end at the bottom. The water distributor 42 is arranged at the water inlet end. The water distributor 42 is used to sprinkle the cooling water entering the cooler 41 on the water inlet end of the cooler 41 to make the cooling water evenly distributed. The cooler 41 is used to exchange heat between the flowing cooling water and air, so that the cooling water is fully cooled by the air. The water tank 43 is arranged at the bottom of the cooler 41 and is used to receive the cooling water flowing out of the water outlet end of the cooler 41. The water tank 43 is connected to the input end of the cooling water pump 44, and the output end of the cooling water pump 44 is connected to the water distributor 42. The water-cooled heat exchange unit 25 is arranged in the cooler 41 to exchange heat with the cooling water. When the cooling water pump 44 is started, the cooling water is transported. The cooling water is output from the output end of the cooling water pump 44 and sequentially passes through the water distributor 42, the water inlet end of the cooler 41, the inside of the cooler 41, the water outlet end of the cooler 41 and the water tank 43 and then flows back to the input end of the cooling water pump 44.

[0040] A cooling water make-up valve 16, a cooling water drain valve 17, a heat exchange water inlet 18 and a heat exchange water outlet 19 are arranged on the chassis 1. The cooling water make-up valve 16 and the cooling water drain valve 17 are connected to the water tank 43, so that the cooling water can be supplemented through the cooling water make-up valve 16 and the cooling water can be discharged through the cooling water drain valve 17. The heat exchange water inlet 18 and the heat exchange water outlet 19 are respectively connected to both ends of the heat exchange water flow channel 283. Thus, when the high-efficiency DC variable-frequency refrigeration and heating module unit is applied to the terminal, the liquid to be heated or cooled externally can be connected into the heat exchange water flow channel 283 of the integrated heat exchanger 28 through the heat exchange water inlet 18, so that the liquid is heated or cooled, and finally the heated or cooled liquid is discharged from the heat exchange water outlet 19. A cooling and heating water pump is also arranged on the pipeline between the heat exchange water outlet 19 and the heat exchange water flow channel 283, so that the liquid can be quickly discharged.

[0041] By setting the above components, the high-efficiency DC variable-frequency refrigeration and heating module unit in this embodiment can achieve two working modes: a refrigeration mode and a heating mode. The working process is as follows:

[0042] Refrigeration mode:

[0043] As Figure 9As shown, the finned heat exchanger 24 and the water-cooled heat exchange unit 25 are used as condensers, the integrated heat exchanger 28 is used as an evaporator, the enthalpy-increasing valve 272 is in the closed state, the first port 231 and the second port 232 of the four-way valve 23 are in communication, the third port 233 and the fourth port 234 of the four-way valve 23 are in communication, and the rest of the components are in the open state;

[0044] At this time, the flow path of the refrigerant in the refrigeration mode is as follows: the outlet 211 of the compressor 21, the inlet 221 of the oil-gas separator 22, the outlet 222 of the oil-gas separator 22, the first port 231 of the four-way valve 23, the second port 232, the finned heat exchanger 24, the water-cooled heat exchange unit 25, the liquid storage tank 26, the electronic expansion valve 271, the first refrigerant port a, the first refrigerant flow path 281, the second refrigerant port b, the fourth port 234 of the four-way valve 23, the third port 233, the gas-liquid separator 29, and the suction port 212 of the compressor 21. Among them, the bypass solenoid valve 30 is open, which allows part of the refrigerant discharged from the outlet 222 of the oil-gas separator 22 to directly flow back into the gas-liquid separator 29 to timely supplement the refrigerant entering the compressor 21.

[0045] In the refrigeration mode, the water cooling assembly is in the working state, and the flow path of the cooling water is as follows: the output end of the cooling water pump 44, the water distributor 42, the water inlet end of the cooler 41, inside the cooler 41, the water outlet end of the cooler 41, the water tank 43, and the input end of the cooling water pump 44.

[0046] Heating mode:

[0047] As Figure 10 shown, the finned heat exchanger 24 and the water-cooled heat exchange unit 25 are used as evaporators, the integrated heat exchanger 28 is used as a condenser, the bypass solenoid valve 30 and the water cooling assembly are in the closed state, the first port 231 and the fourth port 234 of the four-way valve 23 are in communication, the second port 232 and the third port 233 are in communication, and the rest of the components are in the open state.

[0048] At this time, the flow path of the refrigerant in the heating mode is as follows: the outlet 211 of the compressor 21, the inlet 221 of the oil-gas separator 22, the outlet 222 of the oil-gas separator 22, the first port 231 of the four-way valve 23, the fourth port 234, the second refrigerant port b, the first refrigerant flow path 281, the first refrigerant port a, the electronic expansion valve 271, the liquid storage tank 26, the water-cooled heat exchange unit 25, the finned heat exchanger 24, the second port 232 of the four-way valve 23, the third port 233, the gas-liquid separator 29, and the suction port 212 of the compressor 21. Among them, the enthalpy-increasing valve is opened, so that part of the refrigerant flowing out from the first refrigerant port a passes through the enthalpy-increasing valve and then enters the enthalpy-increasing port 213 of the compressor 21 through the third refrigerant port c, the second refrigerant flow path 282, and the fourth refrigerant port d, thereby increasing the suction volume of the compressor 21, reducing the exhaust temperature, and improving the heating efficiency.

[0049] It can be seen from the above technical solutions that the high-efficiency DC variable-frequency refrigeration and heating module unit of the present application effectively cools the refrigerant of the water-cooled heat exchange unit by means of water cooling when in the refrigeration mode by setting the water cooling component 4, greatly improving the refrigeration effect, being able to adapt to high-temperature environments, with obvious economic benefits. In addition, the water cooling component 4, the water-cooled heat exchange unit, and the finned heat exchanger 24 are respectively arranged in two ventilation cavities, which can prevent the finned heat exchanger 24 from being corroded by water vapor and greatly improve the service life.

[0050] Preferably, in this embodiment, the cooler 41 includes a frame body 411 and a plurality of water flow plates 412. The plurality of water flow plates 412 are sequentially arranged in the frame body 411 in the vertical direction. Each water flow plate 412 is provided with a plurality of water dripping holes 4124, so that the cooling water can flow from the uppermost water flow plate 412 to the lowermost water flow plate 412 in sequence. The water-cooled heat exchange unit 25 includes a number of spiral fin heat exchange tubes 251. One spiral fin heat exchange tube 251 is arranged between two adjacent water flow plates 412, and the spiral fin heat exchange tube 251 allows the refrigerant to pass through. When air enters from the second air inlet 14 of the chassis 1 and is discharged from the air outlet cylinder 15, it can fully exchange heat with the cooling water flowing on the water flow plate 412, effectively cooling the cooling water. Among them, the cooling water can flow from top to bottom through a plurality of water flow plates 412 in sequence, and the gaps between the plurality of water flow plates 412 allow air to pass through to cool the cooling water. The cooler 41 arranged as above can cool and lower the temperature of the cooling water, thereby improving the cooling effect of the cooling water on the refrigerant. The spiral fin heat exchange tube 251 is directly arranged between two adjacent water flow plates 412, which can also enhance its heat exchange efficiency.

[0051] In this embodiment, the water flow plate 412 is bent and formed into a first plate portion 4121, a second plate portion 4122, and a third plate portion 4123 that are connected in sequence. The first plate portion 4121, the second plate portion 4122, and the third plate portion 4123 enclose a water-retaining space. Among them, the second plate portion 4122 is parallel to the horizontal plane, the included angle between the first plate portion 4121 and the second plate portion 4122 is 129°, and the included angle between the second plate portion 4122 and the third plate portion 4123 is 124°. The water-retaining space can temporarily block the flow of the cooling water, so that the cooling water stays on the water flow plate 412 for a longer time and is in contact with the air for a longer time, resulting in a better cooling effect. The water flow plate 412 configured in this way has a reasonable structure.

[0052] Further, a plurality of water dripping holes 4124 are arranged in sequence along the length direction of the water flow plate 412, and the water dripping holes 4124 are provided on the second plate portion 4122. In this way, when the cooling water flows through the water flow plate 412, a plurality of water droplets can also be formed and dripped through the plurality of water dripping holes 4124. The positions of the water dripping holes 4124 are reasonably arranged, which can increase the contact area between the cooling water and the air and improve the cooling effect.

[0053] To improve the cooling effect of the cooling water, preferably, two coolers 41 are provided. One of the coolers 41 is fixedly arranged with the water tank 43, and the other cooler 41 is detachably arranged with the water tank 43. The water-cooled heat exchange unit 25 is arranged on the cooler 41 that is fixedly arranged with the water tank 43. By adopting two coolers 41, the contact area between the cooling water and the air can be increased, the heat exchange efficiency of the cooling water can be enhanced, so that the temperature of the cooling water is lower, and one of the coolers 41 is detachably arranged, which is convenient for installation, and the cooler 41 can be removed when such a strong cooling effect is not required.

[0054] Preferably, a cooling water filter 431 is arranged in the water tank 43, which can filter the cooling water to prevent impurities in the cooling water from blocking the channels.

[0055] Preferably, a first filter is connected in series to the pipeline between the electronic expansion valve 271 and the first refrigerant port a, and a second filter is connected in series to the pipeline between the electronic expansion valve 271 and the liquid storage tank 26, so as to effectively filter the refrigerant.

[0056] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An efficient DC variable frequency refrigeration and heating modular unit, characterized in that, Including: A chassis, a refrigerant circulation component and a water cooling component arranged in the chassis; An upper accommodation cavity and a lower accommodation cavity which are separated up and down are formed in the chassis. The upper accommodation cavity is separated into a first ventilation cavity and a second ventilation cavity by a partition board. An air outlet pipe communicating the first ventilation cavity and the second ventilation cavity is arranged at the top of the chassis. A blower is arranged in the air outlet pipe. A first air inlet communicating the first ventilation cavity and a second air inlet communicating the second ventilation cavity are arranged on the side surface of the chassis; The refrigerant circulation component includes a compressor, an oil-gas separator, a four-way valve, a finned heat exchanger, a water-cooled heat exchange unit, a liquid storage tank, an electronic expansion valve, an enthalpy-increasing valve, an integrated heat exchanger and a gas-liquid separator which are connected through pipelines. Among them, the finned heat exchanger is arranged in the first ventilation cavity, the water-cooled heat exchange unit and the water cooling component are arranged in the second ventilation cavity, and the water cooling component can use cooling water to exchange heat with air to cool the water-cooled heat exchange unit; A first refrigerant flow channel, a second refrigerant flow channel and a heat exchange water flow channel which exchange heat with each other are arranged in the integrated heat exchanger. Two ends of the first refrigerant flow channel are respectively a first refrigerant port and a second refrigerant port. Two ends of the second refrigerant flow channel are respectively a third refrigerant port and a fourth refrigerant port; Among them, the air outlet of the compressor communicates with the air inlet of the oil-gas separator, the air outlet of the oil-gas separator communicates with the first port of the four-way valve, the oil outlet of the oil-gas separator communicates with the suction port of the compressor, the second port of the four-way valve sequentially passes through the finned heat exchanger, the water-cooled heat exchange unit, the liquid storage tank, the electronic expansion valve, the first refrigerant port, the first refrigerant flow channel and the second refrigerant port and then communicates with the fourth port of the four-way valve. The third port of the four-way valve communicates with the suction port of the compressor through the gas-liquid separator. One end of the enthalpy-increasing valve communicates with the pipeline between the first refrigerant port and the electronic expansion valve, and the other end sequentially passes through the third refrigerant port, the second refrigerant flow channel and the fourth refrigerant port and then communicates with the enthalpy-increasing port of the compressor. The air outlet of the oil-gas separator also communicates with the pipeline between the third port of the four-way valve and the gas-liquid separator through a bypass solenoid valve.

2. The high-efficiency DC variable-frequency refrigeration and heating module unit according to claim 1, characterized in that: The water cooling component includes a cooler, a water distributor, a water tank and a cooling water pump. The cooler includes a water inlet end at the top and a water outlet end at the bottom. The water distributor is arranged at the water inlet end. The cooler is used for exchanging heat between the flowing cooling water and air. The water tank is arranged at the bottom of the cooler and is used for receiving the cooling water flowing out from the water outlet end of the cooler. The water tank communicates with the input end of the cooling water pump. The output end of the cooling water pump communicates with the water distributor. The water-cooled heat exchange unit is arranged in the cooler and thus exchanges heat with the cooling water.

3. The high-efficiency DC variable-frequency refrigeration and heating module unit according to claim 2, characterized in that: A cooling water make-up valve, a cooling water drain valve, a heat exchange water inlet, and a heat exchange water outlet are provided on the chassis. The cooling water make-up valve and the cooling water drain valve are connected to the water tank, and the heat exchange water inlet and the heat exchange water outlet are respectively connected to two ends of the heat exchange water flow channel.

4. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to claim 2, wherein: The cooler includes a frame body and a plurality of water flow plates. The plurality of water flow plates are sequentially arranged in the frame body in the vertical direction. A plurality of water dripping holes are provided on each water flow plate, so that the cooling water can flow from the uppermost water flow plate to the lowermost water flow plate in sequence. The water-cooled heat exchange unit includes a plurality of spiral finned heat exchange tubes, and one of the spiral finned heat exchange tubes is arranged between two adjacent water flow plates.

5. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to claim 4, wherein: The water flow plate is bent and formed into a first plate portion, a second plate portion, and a third plate portion that are sequentially connected. The first plate portion, the second plate portion, and the third plate portion enclose a water holding space. Among them, the second plate portion is parallel to the horizontal plane, the included angle between the first plate portion and the second plate portion is 129°, and the included angle between the second plate portion and the third plate portion is 124°.

6. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to claim 5, wherein: The plurality of water dripping holes are arranged in sequence along the length direction of the water flow plate, and the water dripping holes are provided on the second plate portion.

7. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to claim 2, wherein: Two coolers are provided. One of the coolers is fixedly arranged with the water tank, and the other cooler is detachably arranged with the water tank. The water-cooled heat exchange unit is arranged on the cooler fixedly arranged with the water tank.

8. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to claim 2, wherein: A cooling water filter is provided in the water tank.

9. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to any one of claims 1-8, wherein: The chassis is a rectangular structure. The chassis has four side surfaces. The first air inlet is provided on three sequentially connected side surfaces of the chassis. The second air inlet is provided on the side surface of the chassis where the first air inlet is not provided. The finned heat exchanger is exposed in the first air inlet.

10. The high-efficiency direct-current variable-frequency refrigeration and heating module unit according to any one of claims 1-8, wherein: A first filter is connected in series to the pipeline between the electronic expansion valve and the first refrigerant port, and a second filter is connected in series to the pipeline between the electronic expansion valve and the liquid storage tank.

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