Compression device cooled by liquid cooling

Abstract

The embodiment of the utility model provides a compression device using liquid cooling for cooling. The compression device comprises at least one compressor unit, the compressor unit comprises a compressor and a gas-liquid separator, and a gas outlet of the compressor is connected with a gas inlet of the gas-liquid separator; the cooling unit comprises at least one medium cooler and at least one aftercooler; a hot side channel of at least one medium cooler is connected with a lubricating medium outlet of the gas-liquid separator and a lubricating medium inlet of the compressor through a lubricating medium pipeline to form a lubricating medium circulation loop; a hot side channel of at least one aftercooler is connected with a gas outlet of the gas-liquid separator through a gas conveying pipeline; the cold side channel of the at least one medium cooler and the cold side channel of the at least one aftercooler are connected in series through a refrigerant pipeline. Therefore, the pipeline structure is simple, miniaturization of the cooling unit is facilitated, and the overall size of the compression device is reduced.

Description

Technical Field

[0001] Example embodiments of the present application generally relate to the field of compression devices, and more particularly to a compression device utilizing liquid cooling. Background Art

[0002] Compressors are used to compress gas, and they usually need to be equipped with cooling systems to assist the operation of the compressor. Traditional cooling systems that use refrigerants such as water to cool compressors have complex piping structures and occupy a large space, which is not conducive to the compressor; in addition, current compressors often waste heat exchange energy (refrigerant) due to unreasonable layout of the cooling system, which is not conducive to the environment. Utility Model Content

[0003] The purpose of the present application is to provide a compression device using liquid cooling to solve or at least partially solve the above-mentioned problems and / or other potential problems existing in traditional compressors.

[0004] In the first aspect of the present application, a compression device using liquid cooling is provided. The compression device comprises: at least one compressor unit, the compressor unit comprises a compressor and a gas-liquid separator, the air outlet of the compressor is connected to the air inlet of the gas-liquid separator; at least one cooling unit, the cooling unit comprises at least one medium cooler and at least one aftercooler; the hot side channel of at least one medium cooler is connected to the lubricating medium outlet of the gas-liquid separator and the lubricating medium inlet of the compressor through a lubricating medium pipeline to form a lubricating medium circulation loop; the hot side channel of at least one aftercooler is connected to the air outlet of the gas-liquid separator through a gas transmission pipeline; the cold side channel of at least one medium cooler and the cold side channel of at least one aftercooler are connected in series through a refrigerant pipeline.

[0005] In some embodiments, a cold side inlet of at least one media cooler is connected to a cold side outlet of at least one aftercooler.

[0006] In some embodiments, the at least one compressor group includes a plurality of compressor groups, and the at least one cooling group includes a plurality of cooling groups corresponding one-to-one to the plurality of compressor groups.

[0007] In some embodiments, the compressor includes a compression main unit and a driving motor drivingly connected to the compression main unit; the gas-liquid separator, the compression main unit and the driving motor of each compressor unit are arranged in sequence along a first direction; and multiple compressor units are arranged in sequence along a second direction perpendicular to the first direction.

[0008] In some embodiments, a plurality of cooling units are arranged above the compression mainframes of the plurality of compressor units.

[0009] In some embodiments, the plurality of compressor groups include a plurality of air filters corresponding one to one with the plurality of compressors, and the air filters are disposed above the corresponding drive motors.

[0010] In some embodiments, at least some of the cooling units in the plurality of cooling units are arranged in a vertical stack.

[0011] In some embodiments, it also includes a refrigerant liquid inlet main pipe and a refrigerant liquid outlet main pipe, and multiple cooling units are connected in parallel between the refrigerant liquid inlet main pipe and the refrigerant liquid outlet main pipe.

[0012] In some embodiments, the plurality of compressor groups include a first compressor group and a second compressor group, and the plurality of cooling groups include a first cooling group corresponding to the first compressor group and a second cooling group corresponding to the second compressor group.

[0013] In some embodiments, the first compressor unit includes a first compressor, a first gas-liquid separator and a first air filter, the air inlet of the first compressor is connected to the first air filter, and the air outlet of the first compressor is connected to the first gas-liquid separator; the second compressor unit includes a second compressor, a second gas-liquid separator and a second air filter, the air inlet of the second compressor is connected to the second air filter, and the air outlet of the second compressor is connected to the second gas-liquid separator.

[0014] In some embodiments, the air inlet of the first air filter and the air inlet of the second air filter face in opposite directions.

[0015] In some embodiments, the first cooling unit includes a first aftercooler and at least two first medium coolers, and the hot side channels of the at least two first medium coolers are connected in series through a lubricating medium pipeline; the second cooling unit includes a second aftercooler and at least two second medium coolers, and the hot side channels of the at least two second medium coolers are connected in series through a lubricating medium pipeline.

[0016] In some embodiments, the first cooling unit and the second cooling unit are arranged in a vertical stack.

[0017] In the compression device of the embodiment of the present application, the cooling unit includes at least one medium cooler and at least one aftercooler. The medium cooler is used to cool down the lubricating medium, and the aftercooler is used to cool down the high-temperature compressed gas output by the compressor. The cold side channel of the at least one medium cooler and the cold side channel of the at least one aftercooler are connected in series through a refrigerant pipeline. In this way, the pipeline structure is simple, which is conducive to the miniaturization of the cooling unit, thereby reducing the overall size of the compression device; and the high-temperature compressed gas and the lubricating medium are cooled successively by the series-connected refrigerant, which ensures the heat exchange efficiency while avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features, advantages and aspects of the embodiments of the present application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0019] Figure 1 A schematic diagram showing an example of a compression device according to the present application;

[0020] Figure 2 A schematic diagram showing another example of a compression device according to the present application;

[0021] Figure 3 A perspective view showing another example of a compression device according to the present application is shown.

[0022] Description of reference numerals:

[0023] 100-compressor unit; 110-compressor; 111-compressor host; 112-drive motor; 120-gas-liquid separator; 130-air filter; 140-first compressor unit; 141-first compressor; 142-first gas-liquid separator; 143-first air filter; 150-second compressor unit; 151-second compressor; 152-second gas-liquid separator; 153-second air filter;

[0024] 200-cooling unit; 210-medium cooler; 220-aftercooler; 231-refrigerant inlet main pipe; 232-refrigerant outlet main pipe; 233, 234-refrigerant inlet branch pipes; 235, 236-refrigerant outlet branch pipes; 240-first cooling unit; 241-first aftercooler; 242, 243-first medium cooler; 250-second cooling unit; 251-second aftercooler; 252, 253-second medium cooler. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0026] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0027] The present application embodiment provides a compression device using liquid cooling, Figure 1 A schematic diagram showing an example of a compression device according to the present application is shown in FIG. Figure 1 As shown, the compression device of the embodiment of the present application includes at least one compressor unit 100 and at least one cooling unit 200.

[0028] The at least one compressor unit 100 may include one compressor unit 100 or a plurality of compressor units 100 , such as two compressor units, three compressor units, or four compressor units, etc. Each compressor unit 100 may include a compressor 110 and a gas-liquid separator 120 .

[0029] Alternatively or additionally, the compressor 110 here may be a screw compressor, such as an oil-lubricated screw compressor, a water-lubricated screw compressor or a dry screw compressor. The compressor 110 may have an air inlet, an air outlet and a lubricating medium inlet. The gas-liquid separator 120 may have an air inlet, an air outlet and a lubricating medium outlet, and the air inlet of the gas-liquid separator 120 may be connected to the air outlet of the compressor 110. The high-temperature compressed gas output by the compressor 110 may be mixed with a lubricating medium. The gas-liquid separator 120 can separate the compressed gas and the lubricating medium, and the compressed gas flows out through the air outlet of the gas-liquid separator 120, and the lubricating medium flows out through the lubricating medium outlet of the gas-liquid separator 120. The lubricating medium here may include lubricating oil, water or other media that can lubricate the compressor 110.

[0030] The at least one cooling unit 200 may include one cooling unit 200, or may include multiple cooling units 200. Each cooling unit 200 may include at least one medium cooler 210 and at least one aftercooler 220. The hot side channel of the at least one medium cooler 210 is connected to the lubricating medium outlet of the gas-liquid separator 120 and the lubricating medium inlet of the compressor 110 through a lubricating medium pipeline to form a lubricating medium circulation loop. The hot side channel of the at least one aftercooler 220 is connected to the gas outlet of the gas-liquid separator 120 through a gas pipeline. The cold side channel of the at least one medium cooler 210 and the cold side channel of the at least one aftercooler 220 are connected in series through a refrigerant pipeline. Refrigerant can be transported to the at least one medium cooler 210 and the at least one aftercooler 220 through the refrigerant pipeline, and the high-temperature compressed gas and the lubricating medium are cooled and cooled by the refrigerant. The refrigerant here may include but is not limited to water, salt water (such as an aqueous solution of calcium chloride or sodium chloride), propylene glycol, ethylene glycol, methylene chloride, glacial refrigerant, a mixture of water and ethylene glycol, and the like.

[0031] Alternatively or additionally, the at least one medium cooler 210 may include one medium cooler 210 or a plurality of medium coolers 210. In the case where the at least one medium cooler 210 includes a plurality of medium coolers 210, the cold side channels of the plurality of medium coolers 210 may be connected in series through a refrigerant pipeline, and the hot side channels of the plurality of medium coolers 210 may be connected in series or in parallel.

[0032] Alternatively or additionally, the at least one aftercooler 220 may include one aftercooler 220 or a plurality of aftercoolers 220. In the case where the at least one aftercooler 220 includes a plurality of aftercoolers 220, the cold side channels of the plurality of aftercoolers 220 may be connected in series through a refrigerant pipeline, and the hot side channels of the plurality of aftercoolers 220 may be connected in series or in parallel.

[0033] Regarding the positional relationship between the at least one aftercooler 220 and the at least one medium cooler 210 in the refrigerant flow direction, in one example, the at least one aftercooler 220 may be located on the upstream side of the at least one medium cooler 210 in the refrigerant flow direction. Specifically, the cold side inlet of the at least one aftercooler 220 may be connected to the refrigerant inlet pipeline, and the cold side outlet of the at least one aftercooler 220 may be connected to the cold side inlet of the at least one medium cooler 210. The refrigerant first flows into the at least one aftercooler 220 to cool down the high-temperature compressed gas, which can give priority to ensuring the outlet temperature of the compressed gas, and then flows into the at least one medium cooler 210 to further cool down the lubricating medium.

[0034] In another example, the at least one aftercooler 220 may be located on the downstream side of the at least one medium cooler 210 in the refrigerant flow direction. Specifically, the cold side inlet of the at least one medium cooler 210 may be connected to the refrigerant inlet pipeline, and the cold side outlet of the at least one medium cooler 210 may be connected to the cold side inlet of the at least one aftercooler 220. The refrigerant first flows into the at least one medium cooler 210 to cool down the lubricating medium, which can give priority to ensuring the stable operation of the compressor unit 100, and then flows into the at least one aftercooler 220 to further cool down the high-temperature compressed gas.

[0035] The positional relationship between the aftercooler 220 and the medium cooler 210 in the refrigerant flow direction as described above can be selected according to actual user needs.

[0036] In the compression device of the embodiment of the present application, the cooling unit 200 includes at least one medium cooler 210 and at least one aftercooler 220. The medium cooler 210 is used to cool down the lubricating medium, and the aftercooler 220 is used to cool down the high-temperature compressed gas output by the compressor 110. The cold side channel of the at least one medium cooler 210 and the cold side channel of the at least one aftercooler 220 are connected in series through a refrigerant pipeline. In this way, the pipeline structure is simple, which is conducive to the miniaturization of the cooling unit 200, thereby reducing the overall size of the compression device; and the high-temperature compressed gas and the lubricating medium are cooled successively by a series connection of refrigerants, which ensures the heat exchange efficiency while avoiding energy waste.

[0037] In some embodiments, the at least one compressor unit 100 includes a plurality of compressor units 100, and the at least one cooling unit 200 includes a plurality of cooling units 200 corresponding to the plurality of compressor units 100. In this way, a modular compression device can be formed, and the number of compressor units 100 and cooling units 200 equipped in the compression device can be determined according to actual needs, for example, two compressor units 100 are correspondingly configured with two cooling units 200, or three compressor units 100 are correspondingly configured with three cooling units 200, and so on.

[0038] For example, Figure 2 and Figure 3 As shown, the plurality of compressor groups 100 may include a first compressor group 140 and a second compressor group 150 , and the plurality of cooling groups 200 may include a first cooling group 240 and a second cooling group 250 , the first cooling group 240 may correspond to the first compressor group 140 , and the second cooling group 250 may correspond to the second cooling group 250 .

[0039] The first compressor unit 140 may include a first compressor 141 and a first gas-liquid separator 142, and the gas outlet of the first compressor 141 is connected to the first gas-liquid separator 142. The second compressor unit 150 may include a second compressor 151 and a second gas-liquid separator 152, and the gas outlet of the second compressor 151 is connected to the second gas-liquid separator 152.

[0040] The first cooling unit 240 includes a first aftercooler 241 and two first medium coolers 242 and 243. The hot side inlet of the first aftercooler 241 can be connected to the gas outlet of the first gas-liquid separator 142, and the hot side outlet of the first aftercooler 241 can be connected to the air supply pipeline. The hot side channels of the two first medium coolers 242 and 243 can be connected in series through a lubricating medium pipeline. The hot side channels of the two first medium coolers 242 and 243 are also connected to the lubricating medium outlet of the first gas-liquid separator 142 and the lubricating medium inlet of the first compressor 141 through the lubricating medium pipeline to form a first lubricating medium circulation loop. The cold side channel of the first aftercooler 241 and the cold side channels of the two first medium coolers 242 and 243 can be connected in series through a refrigerant pipeline.

[0041] The second cooling unit 250 includes a second aftercooler 251 and at least two second medium coolers 252 and 253. The hot side inlet of the second aftercooler 251 can be connected to the gas outlet of the first gas-liquid separator 142, and the hot side outlet of the second aftercooler 251 can also be connected to the gas supply pipeline. The hot side channels of the two second medium coolers 252 and 253 can be connected in series through a lubricating medium pipeline. The hot side channels of the two second medium coolers 252 and 253 here are also connected to the lubricating medium outlet of the second gas-liquid separator 152 and the lubricating inlet of the second compressor 151 through the lubricating medium pipeline respectively to form a second lubricating medium circulation loop. The cold side channel of the second aftercooler 251 and the cold side channels of the two second medium coolers 252 and 253 can be connected in series through a refrigerant pipeline. It should be noted that although two compressor units 100 and two cooling units 200 are provided in the above example, in actual application, the number of compressor units 100 and the number of cooling units 200 can be flexibly configured according to actual needs.

[0042] In some embodiments, the compressor 110 includes a compression main unit 111 and a drive motor 112 drivingly connected to the compression main unit 111. The gas-liquid separator 120, the compression main unit 111 and the drive motor 112 of each compressor unit 100 are arranged in sequence along a first direction. Multiple compressor units 100 are arranged in sequence along a second direction perpendicular to the first direction.

[0043] For example, Figure 3 As shown, the first gas-liquid separator 142 of the first compressor unit 140, the compression main unit 111 of the first compressor 141, and the driving motor 112 of the first compressor 141 can be moved in a first direction (eg Figure 3The second gas-liquid separator 152 of the second compressor unit 150, the compression host 111 of the second compressor 151, and the driving motor 112 of the second compressor 151 can also be arranged in sequence along the first direction. The first compressor unit 140 and the second compressor unit 150 can be arranged in sequence along the second direction (for example Figure 3 They are arranged in sequence (in the direction indicated by the arrow Y in the figure).

[0044] In this way, the number of compressor units 100 to be configured can be flexibly selected according to actual needs, and they can be arranged in sequence along the second direction, which not only improves the modularization level of the compression device, but also has a higher regularity.

[0045] In some embodiments, the plurality of compressor units 100 may include a plurality of air filters 130 corresponding to the plurality of compressors 110, and the air filters 130 are disposed above the corresponding drive motors 112. In this way, the air enters the compressor 110 after being filtered by the air filters 130, which can improve the cleanliness of the air intake of the compressor 110. For example, Figure 2 and Figure 3 As shown, the first compressor unit 140 may further include a first air filter 143, and the air inlet of the first compressor 141 is connected to the first air filter 143. The second compressor unit 150 may further include a second air filter 153, and the air inlet of the second compressor 151 is connected to the second air filter 153.

[0046] In some embodiments, multiple cooling units 200 may be arranged above the compression mainframes 111 of multiple compressor units 100. In this way, the free space on the top of the compression mainframe 111 can be well utilized, which is beneficial to improving the compactness of the compressor unit 100, and further beneficial to reducing the size of the compressor unit 100 and the overall size of the compression device.

[0047] In some embodiments, at least some of the cooling units 200 in the plurality of cooling units 200 are arranged vertically (eg, Figure 3 In this way, the compactness of the plurality of cooling units 200 can be improved. For example, Figure 3 As shown, the first cooling unit 240 and the second cooling unit 250 may be disposed above the compression main unit 111 of the first compressor 141 and the compression main unit 111 of the second compressor 151, and the first cooling unit 240 and the second cooling unit 250 may be stacked. Specifically, the second cooling unit 250 may be stacked above the first cooling unit 240.

[0048] In some embodiments, the compression device further includes a refrigerant inlet manifold 231 and a refrigerant outlet manifold 232, and a plurality of cooling units 200 may be connected in parallel between the refrigerant inlet manifold 231 and the refrigerant outlet manifold 232. Alternatively or additionally, the refrigerant inlet manifold 231 may be connected to a plurality of cooling units 200 through a plurality of refrigerant inlet branch pipes, and a plurality of cooling units 200 may be connected to the refrigerant outlet manifold 232 through a plurality of refrigerant outlet branch pipes. In this way, it is helpful to simplify the pipeline structure and facilitate the flow control of the refrigerant.

[0049] For example, Figure 2 and Figure 3 As shown, the refrigerant inlet main pipe 231 can be connected to the cold side inlet of the first aftercooler 241 through the refrigerant inlet branch pipe 233, and the refrigerant inlet main pipe 231 can be connected to the cold side inlet of the second aftercooler 251 through the refrigerant inlet branch pipe 234. The cold side outlet of the first medium cooler 243 can be connected to the refrigerant outlet main pipe 232 through the refrigerant outlet branch pipe 235, and the cold side outlet of the second medium cooler 253 can be connected to the refrigerant outlet main pipe 232 through the refrigerant outlet branch pipe 236. In this way, the first cooling unit 240 and the second cooling unit 250 are connected in parallel between the refrigerant inlet main pipe 231 and the refrigerant outlet main pipe 232, which ensures the cooling effect while simplifying the overall connection pipeline.

[0050] In some embodiments, in order to maintain the cleanliness of the intake air of the compressor 110, the compressor unit 100 may further include an air filter, which may be connected to the air inlet of the compressor 110. The air is first filtered by the air filter and then flows into the compressor 110. Of course, the compressor unit 100 is not limited to compressing air, but can also be used to compress other gases.

[0051] For example, with Figure 2 and Figure 3 As shown, the first compressor unit 140 may further include a first air filter 143, and the air inlet of the first compressor 141 is connected to the first air filter 143. The second compressor unit 150 includes a second air filter 153, and the air inlet of the second compressor is connected to the second air filter 153.

[0052] Alternatively or additionally, the air inlet of the first air filter 143 and the air inlet of the second air filter 153 face opposite directions. In this way, the air inlet flows of the first air filter 143 and the second air filter 153 can be prevented from interfering with each other, which is beneficial to maintaining the stability of the air inlet flow and also beneficial to reducing the air inlet temperature.

[0053] The following Figure 2 and Figure 3 Taking the example shown as an example, the operation process of the compression device in the embodiment of the present application is exemplarily explained.

[0054] The gases are filtered through the first air filter 143 and then flow into the first compressor 141. The high-temperature compressed gas formed after the first compressor 141 compresses the air flows into the first gas-liquid separator 142 (for example, an oil-gas separator). The first gas-liquid separator 142 separates the lubricating medium and the compressed gas. The compressed gas flows into the hot side channel of the first aftercooler 241 through the hot side inlet of the first aftercooler 241 for cooling. The lubricating medium flows into the hot side channels of the first medium coolers 242 and 243 connected in series. The operation process of the second compressor unit 150 is similar to that of the first compressor unit 140. The operation process of the second compressor unit 150 will not be described in detail here. Please refer to the introduction of the first compressor unit 140 mentioned above.

[0055] The refrigerant flows in through the refrigerant inlet main pipe 231, and then is divided into two streams, one stream of the refrigerant flows into the cold side channel of the first aftercooler 241 through the refrigerant inlet branch pipe 233, and the other stream of the refrigerant flows into the cold side channel of the second aftercooler 251 through the refrigerant inlet branch pipe 234. In the first aftercooler 241, the refrigerant exchanges heat with the compressed gas to cool the compressed gas, and the compressed gas after cooling flows into the gas supply pipeline for gas supply. The refrigerant flowing out of the cold side channel of the first aftercooler 241 flows into the cold side channels of the first medium coolers 242 and 243, and then flows from the cold side channel of one first medium cooler 242 into the cold side channel of another first medium cooler 243; and the refrigerant flowing out of the cold side channel of the second aftercooler 251 flows into the cold side channels of the second medium coolers 252 and 253, and then flows from the cold side channel of one second medium cooler 252 into the cold side channel of another second medium cooler 253. Then, the refrigerant flowing out of the first cooling unit 240 is connected to the refrigerant liquid outlet main pipe 232 via the refrigerant liquid outlet branch pipe 235, and the refrigerant flowing out of the second cooling unit 250 is connected to the refrigerant liquid outlet main pipe 232 via the refrigerant liquid outlet branch pipe 236. The refrigerant whose temperature rises after heat exchange in the refrigerant liquid outlet main pipe 232 is cooled by the external system, and then flows into the compression device again through the refrigerant liquid inlet main pipe 231 for cyclic heat exchange.

[0056] As described above, the compressed gas cooled by the first aftercooler 241 and the second aftercooler 251 is combined into one channel and supplied to customers through a centralized gas supply pipeline; the lubricating medium cooled by the first medium coolers 242 and 243 connected in series flows back to the first compressor 141 through the corresponding hot side channel outlet, and is used to lubricate the compression main unit of the first compressor 141. In addition, the lubricating medium cooled by the second medium coolers 252 and 253 connected in series flows back to the second compressor 151 through its corresponding other hot side channel outlet, and is used to lubricate the compression main unit of the second compressor 151.

[0057] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A compression device using liquid cooling, comprising: At least one compressor unit, the compressor unit comprising a compressor and a gas-liquid separator, the gas outlet of the compressor being connected to the gas inlet of the gas-liquid separator; at least one cooling unit, the cooling unit comprising at least one medium cooler and at least one aftercooler; The hot side channel of the at least one medium cooler is connected to the lubricating medium outlet of the gas-liquid separator and the lubricating medium inlet of the compressor through a lubricating medium pipeline to form a lubricating medium circulation loop; the hot side channel of the at least one aftercooler is connected to the gas outlet of the gas-liquid separator through an air supply pipeline; the cold side channel of the at least one medium cooler and the cold side channel of the at least one aftercooler are connected in series through a refrigerant pipeline. 2 . The compression device according to claim 1 , wherein a cold side inlet of the at least one medium cooler is connected to a cold side outlet of the at least one aftercooler.

3. The compression device according to any one of claims 1 or 2, wherein the at least one compressor unit comprises a plurality of compressor units, and the at least one cooling unit comprises a plurality of cooling units corresponding one-to-one to the plurality of compressor units.

4. The compression device according to claim 3, wherein the compressor comprises a compression main unit and a driving motor drivingly connected to the compression main unit; the gas-liquid separator, the compression main unit and the driving motor of each compressor unit are arranged in sequence along a first direction; and the plurality of compressor units are arranged in sequence along a second direction perpendicular to the first direction.

5. The compression device according to claim 4, wherein the plurality of cooling units are arranged above the compression main units of the plurality of compressor units.

6. According to the compression device of claim 4, the plurality of compressor groups include a plurality of air filters corresponding one-to-one to the plurality of compressors, and the air filters are arranged above the corresponding drive motors.

7. The compression device according to claim 3, wherein at least some of the plurality of cooling units are arranged in a vertical stack.

8. The compression device according to claim 3 further comprises a refrigerant liquid inlet main pipe and a refrigerant liquid outlet main pipe, and the plurality of cooling units are connected in parallel between the refrigerant liquid inlet main pipe and the refrigerant liquid outlet main pipe.

9. The compression device according to claim 3, wherein the plurality of compressor groups include a first compressor group and a second compressor group, and the plurality of cooling groups include a first cooling group corresponding to the first compressor group and a second cooling group corresponding to the second compressor group.

10. The compression device according to claim 9, wherein the first compressor unit comprises a first compressor, a first gas-liquid separator and a first air filter, an air inlet of the first compressor is connected to the first air filter, and an air outlet of the first compressor is connected to the first gas-liquid separator; The second compressor unit includes a second compressor, a second gas-liquid separator and a second air filter. The air inlet of the second compressor is connected to the second air filter, and the air outlet of the second compressor is connected to the second gas-liquid separator.

11. The compression device according to claim 10, wherein an air inlet of the first air filter and an air inlet of the second air filter face in opposite directions.

12. The compression device according to claim 9, wherein the first cooling unit comprises a first aftercooler and at least two first medium coolers, and the hot side channels of the at least two first medium coolers are connected in series through a lubricating medium pipeline; The second cooling unit includes a second aftercooler and at least two second medium coolers, and the hot side channels of the at least two second medium coolers are connected in series through a lubricating medium pipeline.

13. The compression device according to claim 12, wherein the first cooling unit and the second cooling unit are arranged in a vertical stack.

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