Oil separation device, condenser, and refrigeration system using the oil separation device or the condenser

Abstract

The present application discloses an oil separation device, a condenser with an oil separation function, and a refrigeration system using the oil separation device and the condenser. The oil separation device or the condenser includes: a housing, an oil separation chamber is included in the housing; a first refrigerant inlet and a second refrigerant inlet; a first diversion channel; and a second diversion channel; wherein, the first diversion channel and the second diversion channel are configured such that the refrigerant gas flowing through the first diversion channel can be mixed with the refrigerant gas flowing through the second diversion channel. When the refrigeration system includes two compressors with different displacements, the oil separation device or the condenser can meet the requirements of sufficient filtration and separation of gaseous refrigerant and lubricating oil without designing the size of the oil separation chamber according to the displacement of the large-displacement compressor. This can make the size of the oil separation chamber smaller, thereby making the overall size of the oil separation device or the condenser smaller.

Description

Technical Field

[0001] The present application relates to an oil separation device, a condenser, and a refrigeration system using the oil separation device or the condenser, and is particularly applicable to a refrigeration system including two compressors. Background Art

[0002] In an existing refrigeration system, a lubricating substance (such as lubricating oil) for lubricating a compressor is discharged from the compressor together with a gaseous refrigerant compressed by the compressor. The gaseous refrigerant and the lubricating oil generally need to pass through an oil separation device or a condenser with an oil separation function to complete oil-gas separation. The separated lubricating oil is conveyed back to the compressor, and the separated gaseous refrigerant is used to be subsequently condensed into a liquid refrigerant. Specifically, both the oil separation device and the condenser with an oil separation function include an oil separation chamber, and a filter screen is provided in the oil separation chamber. In the oil separation chamber, the gaseous refrigerant and the lubricating oil pass through the filter screen to separate the lubricating oil from the gaseous refrigerant.

[0003] Generally speaking, the size of the oil separation chamber affects the size of the oil separation device or the condenser with an oil separation function, and the size of the oil separation chamber is also related to the displacement of the compressor. The larger the displacement of the compressor, the greater the flow rate of the mixture of the lubricating oil and the gaseous refrigerant discharged into the oil separation chamber per unit time. In order to obtain a reasonable horizontal oil separation flow rate and ensure the separation effect of the lubricating oil and the gaseous refrigerant, the oil separation chamber needs to have a sufficiently large size. Summary of the Invention

[0004] For a refrigeration system including multiple compressors, when each compressor is used in parallel in the same refrigeration system and shares an oil separation device or a condenser with an oil separation function, it usually intakes air from both ends in the length direction (or axial direction) of the oil separation device or the condenser. When the displacements of each compressor are different, it is necessary to design the size (or radial cross-sectional area) of the oil separation chamber according to the compressor with the largest displacement. However, for the compressor with a smaller displacement in this refrigeration system, such a large-sized oil separation chamber is not required, and the corresponding cross-sectional area of the oil separation is passively enlarged and overdesigned, resulting in waste.

[0005] To solve the above problems, at least one object of the present application in the first aspect is to provide an oil separation device, and the oil separation device includes: a housing, an oil separation chamber is included in the housing; a first refrigerant inlet and a second refrigerant inlet, the first refrigerant inlet and the second refrigerant inlet are provided on the housing; a first diversion channel, the first diversion channel is provided in the oil separation chamber, the first diversion channel has an inlet and an outlet, and the inlet of the first diversion channel is in fluid communication with the first refrigerant inlet to divert at least a part of the refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion channel to the outlet of the first diversion channel; and a second diversion channel, the second diversion channel is provided in the oil separation chamber, the second diversion channel has an inlet and an outlet, and the inlet of the second diversion channel is in fluid communication with the second refrigerant inlet to divert at least a part of the refrigerant gas entering the second refrigerant inlet from the inlet of the second diversion channel to the outlet of the second diversion channel; wherein, the first diversion channel and the second diversion channel are configured such that the refrigerant gas flowing out of the outlet of the first diversion channel can be mixed with the refrigerant gas flowing out of the outlet of the second diversion channel.

[0006] According to the above first aspect, the outlet of the first diversion channel and the outlet of the second diversion channel are close to each other.

[0007] According to the above first aspect, the oil separation device further includes: at least one communication port for fluid communication with a condensing device; at least one filter screen, the at least one filter screen is arranged transversely to the length direction of the housing in the oil separation chamber; wherein, the at least one filter screen is arranged between the at least one communication port and the outlet of the first diversion channel and the outlet of the second diversion channel that are close to each other, so that the mixed refrigerant gas can flow through the at least one filter screen to reach the at least one communication port.

[0008] According to the above first aspect, the at least one communication port includes two communication ports, and the two communication ports are respectively arranged at opposite ends in the length direction of the housing; the at least one filter screen includes a first filter screen and a second filter screen; wherein, the first filter screen is arranged between the outlet of the first diversion channel and one of the two communication ports; the second filter screen is arranged between the outlet of the second diversion channel and the other of the two communication ports.

[0009] According to the first aspect described above, the first diversion channel and the second diversion channel extend from opposite ends in the length direction of the housing towards the middle of the housing along the length direction of the housing; wherein, the outlets of the first diversion channel and the second diversion channel are arranged such that they are spaced apart by a distance in the length direction of the housing, or are offset by a distance in a direction perpendicular to the length direction of the housing.

[0010] According to the first aspect described above, the outlet of the first diversion channel is arranged between the outlet of the second diversion channel and the inlet of the first diversion channel; and the outlet of the second diversion channel is arranged between the outlet of the first diversion channel and the inlet of the second diversion channel.

[0011] According to the first aspect described above, the outlet of the first diversion channel is arranged between the outlet of the second diversion channel and the inlet of the second diversion channel; and the outlet of the second diversion channel is arranged between the outlet of the first diversion channel and the inlet of the first diversion channel.

[0012] According to the first aspect described above, the oil separation device further includes: a blocking member, which is arranged between the outlet of the first diversion channel and the outlet of the second diversion channel.

[0013] According to the first aspect described above, the blocking member is a baffle plate or a filter screen.

[0014] According to the first aspect described above, the position and size of the blocking member are arranged such that in the length direction of the housing, the blocking member can at least partially block the outlet of the first diversion channel and the outlet of the second diversion channel.

[0015] According to the first aspect described above, the first diversion channel is formed by a first diversion partition and the housing, and the second diversion channel is formed by a second diversion partition and the housing.

[0016] According to the first aspect described above, the middle part of the first diversion partition and / or the second diversion partition is bent to form an upper plate and a lower plate with a certain included angle.

[0017] According to the first aspect described above, the first diversion channel is formed by a first diversion pipe, and the second diversion channel is formed by a second diversion pipe.

[0018] According to the first aspect described above, the second diversion channel has an additional outlet, and the additional outlet is arranged away from the outlet of the first diversion channel; the at least one communication port includes one communication port, and the communication port is located between the outlet of the second diversion channel and the additional outlet; the at least one filter screen includes one filter screen, and the filter screen is arranged between the outlet of the second diversion channel and the communication port; the oil separation device further includes an additional filter screen, and the additional filter screen is arranged between the additional outlet of the second diversion channel and the communication port.

[0019] According to the first aspect described above, the first diversion channel longitudinally extends from one end in the length direction of the housing into the oil separation chamber of the housing, and the second diversion channel extends from the other end in the length direction of the housing towards the direction of the first diversion channel.

[0020] According to the first aspect described above, the first diversion channel is formed by a diversion straight pipe, and the second diversion channel is formed by a diversion partition plate and the housing.

[0021] According to the first aspect described above, the first diversion channel and the second diversion channel longitudinally extend from the middle of the housing into the oil separation chamber of the housing side by side, and both the first diversion channel and the second diversion channel are formed by diversion straight pipes; wherein, the first diversion channel is arranged close to the second diversion channel.

[0022] According to the first aspect described above, the at least one communication port is arranged on the housing, and the at least one communication port is used for fluid communication with the condensation device in the condenser.

[0023] At least one object of the present application in the first aspect is to provide a condenser, the condenser comprising: a housing having a cavity therein; an oil separation partition disposed in the housing and extending along the length direction of the housing, the oil separation partition separating the cavity into an oil separation chamber and a condensation chamber, the oil separation partition including at least one communication port that communicates the oil separation chamber and the condensation chamber; a first refrigerant inlet and a second refrigerant inlet disposed on the housing; a first diversion channel disposed in the oil separation chamber, the first diversion channel having an inlet and an outlet, the inlet of the first diversion channel being in fluid communication with the first refrigerant inlet to divert at least a portion of the refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion channel to the outlet of the first diversion channel; and a second diversion channel disposed in the oil separation chamber, the second diversion channel having an inlet and an outlet, the inlet of the second diversion channel being in fluid communication with the second refrigerant inlet to divert at least a portion of the refrigerant gas entering the second refrigerant inlet from the inlet of the second diversion channel to the outlet of the second diversion channel; wherein the first diversion channel and the second diversion channel are configured such that the refrigerant gas flowing out of the outlet of the first diversion channel and the refrigerant gas flowing out of the outlet of the second diversion channel can be mixed.

[0024] According to the second aspect above, the outlet of the first diversion channel and the outlet of the second diversion channel are close to each other.

[0025] According to the second aspect above, the condenser further comprises: at least one communication port for fluid communication with a condensation device; at least one filter screen disposed perpendicular to the length direction of the housing in the oil separation chamber; wherein the at least one filter screen is disposed between the at least one communication port and the outlets of the first diversion channel and the second diversion channel that are close to each other, so that the mixed refrigerant gas can flow through the at least one filter screen to reach the at least one communication port.

[0026] According to the second aspect above, the at least one communication port includes two communication ports respectively disposed at opposite ends in the length direction of the housing; the at least one filter screen includes a first filter screen and a second filter screen; wherein the first filter screen is disposed between the outlet of the first diversion channel and one of the two communication ports; the second filter screen is disposed between the outlet of the second diversion channel and the other of the two communication ports.

[0027] According to the second aspect described above, the first diversion channel and the second diversion channel extend from opposite ends in the length direction of the housing towards the middle of the housing along the length direction of the housing; wherein, the outlet of the first diversion channel and the outlet of the second diversion channel are arranged such that they are spaced apart by a distance in the length direction of the housing, or are offset by a distance in a direction perpendicular to the length direction of the housing.

[0028] According to the second aspect described above, the outlet of the first diversion channel is arranged between the outlet of the second diversion channel and the inlet of the first diversion channel; and the outlet of the second diversion channel is arranged between the outlet of the first diversion channel and the inlet of the second diversion channel.

[0029] According to the second aspect described above, the outlet of the first diversion channel is arranged between the outlet of the second diversion channel and the inlet of the second diversion channel; and the outlet of the second diversion channel is arranged between the outlet of the first diversion channel and the inlet of the first diversion channel.

[0030] According to the second aspect described above, the condenser further includes: a blocking member, and the blocking member is arranged between the outlet of the first diversion channel and the outlet of the second diversion channel.

[0031] According to the second aspect described above, the blocking member is a blocking plate or a filter screen.

[0032] According to the second aspect described above, the position and size of the blocking member are arranged such that in the length direction of the housing, the blocking member can at least partially block the outlet of the first diversion channel and the outlet of the second diversion channel.

[0033] According to the second aspect described above, the first diversion channel is formed by a first diversion partition and the housing, and the second diversion channel is formed by a second diversion partition and the housing.

[0034] According to the second aspect described above, the first diversion channel is formed by a first diversion pipe, and the second diversion channel is formed by a second diversion pipe.

[0035] According to the second aspect described above, the second diversion channel has an additional outlet, and the additional outlet is arranged away from the outlet of the first diversion channel; the at least one communication port includes one communication port, and the communication port is located between the outlet of the second diversion channel and the additional outlet; the at least one filter screen includes one filter screen, and the filter screen is arranged between the outlet of the second diversion channel and the communication port; the condenser further includes an additional filter screen, and the additional filter screen is arranged between the additional outlet of the second diversion channel and the communication port.

[0036] According to the second aspect described above, the first diversion channel longitudinally extends from one end in the length direction of the housing towards the oil separation chamber of the housing, and the second diversion channel extends from the other end in the length direction of the housing towards the direction of the first diversion channel.

[0037] According to the second aspect described above, the first diversion channel is formed by a diversion straight pipe, and the second diversion channel is formed by a diversion partition plate and the housing.

[0038] According to the second aspect described above, the first diversion channel and the second diversion channel longitudinally extend side by side from the middle of the housing towards the oil separation chamber of the housing, and both the first diversion channel and the second diversion channel are formed by diversion straight pipes; wherein, the first diversion channel is arranged close to the second diversion channel.

[0039] At least one object of the present application in the third aspect is to provide a refrigeration system, and the refrigeration system includes: a compressor unit; an oil separation device, wherein the oil separation device is the oil separation device according to the first aspect described above; a condenser; a throttling device; and an evaporator; wherein, the compressor unit, the oil separation device, the condenser, the throttling device and the evaporator are sequentially connected to form a refrigerant circulation loop; wherein, the compressor unit includes: a first compressor and a second compressor, and the first compressor and the second compressor are connected in parallel between the oil separation device and the evaporator; wherein, the suction ports of the first compressor and the second compressor are connected to the evaporator; and wherein, the discharge port of the first compressor is connected to the first refrigerant inlet of the oil separation device, and the discharge port of the second compressor is connected to the second refrigerant inlet of the oil separation device.

[0040] According to the third aspect described above, the displacement of the first compressor is smaller than the displacement of the second compressor.

[0041] At least one object of the present application in the fourth aspect is to provide a refrigeration system, the refrigeration system comprising: a compressor unit; a condenser, wherein the condenser is the condenser according to the second aspect described above; a throttling device; and an evaporator; wherein, the compressor unit, the condenser, the throttling device and the evaporator are connected in sequence to form a refrigerant circulation loop; wherein, the compressor unit comprises: a first compressor and a second compressor, the first compressor and the second compressor are connected in parallel between the condenser and the evaporator; wherein, the suction port of the first compressor and the suction port of the second compressor are connected to the evaporator; and wherein, the discharge port of the first compressor is connected to the first refrigerant inlet of the condenser, and the discharge port of the second compressor is connected to the second refrigerant inlet of the condenser.

[0042] According to the fourth aspect described above, the displacement of the first compressor is smaller than the displacement of the second compressor. Description of the Drawings

[0043] Figure 1 is a structural block diagram of an embodiment of the refrigeration system of the present application;

[0044] Figure 2 is Figure 1 a three-dimensional structural diagram of the condenser in

[0045] Figure 3 is Figure 2 a radial sectional view of the condenser in

[0046] Figure 4A is Figure 1 an axial sectional view of the first embodiment of the condenser in

[0047] Figure 4B is Figure 4A a three-dimensional structural diagram of the internal structure of the condenser in viewed from the front side angle in

[0048] Figure 4C is Figure 4A a three-dimensional structural diagram of the internal structure of the condenser in viewed from the rear side angle in

[0049] Figure 4D is Figure 4A a radial sectional view of the condenser in

[0050] Figure 5 is Figure 1 an axial sectional view of the second embodiment of the condenser in

[0051] Figure 6 is Figure 1 an axial sectional view of the third embodiment of the condenser in

[0052] Figure 7 The Figure 1 axial sectional view of the fourth embodiment of the condenser in

[0053] Figure 8 The Figure 1 axial sectional view of the fifth embodiment of the condenser in

[0054] Figure 9 The Figure 1 axial sectional view of the sixth embodiment of the condenser in

[0055] Figure 10 The Figure 1 axial sectional view of the seventh embodiment of the condenser in

[0056] Figure 11 The Figure 1 axial sectional view of the eighth embodiment of the condenser in

[0057] Figure 12 structural block diagram of another embodiment of the refrigeration system of the present application;

[0058] Figure 13 The Figure 12 three-dimensional structure diagram of an embodiment of the oil separation device in

[0059] Figure 14 The Figure 13 axial sectional view of the oil separation device in

[0060] Figure 15 The Figure 12 axial sectional view of the second embodiment of the oil separation device in

[0061] Figure 16 The Figure 12 axial sectional view of the third embodiment of the oil separation device in

[0062] Figure 17 The Figure 12 axial sectional view of the fourth embodiment of the oil separation device in

[0063] Figure 18 The Figure 12 axial sectional view of the fifth embodiment of the oil separation device in

[0064] Figure 19 The Figure 12 axial sectional view of the sixth embodiment of the oil separation device in

[0065] Figure 20 The Figure 12 axial sectional view of the seventh embodiment of the oil separation device in

[0066] Figure 21 The Figure 12 axial sectional view of the eighth embodiment of the oil separation device in Detailed implementation manners

[0067] The following will describe various specific implementation manners of the present application with reference to the drawings forming a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "top", "bottom", etc., are used in the present application to describe various exemplary structural parts and elements of the present application, these terms are used herein only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating directions are only for illustration and should not be construed as limitations. Where possible, the same or similar reference numerals used in the present application refer to the same components.

[0068] Figure 1 is a structural block diagram of an embodiment of the refrigeration system 100 of the present application, which is used to show the connection relationships of the components in the refrigeration system including two parallel compressors. In the embodiment of the present application, the condenser 130 has an oil separation function, and the specific structure for specifically implementing this function will be specifically described below.

[0069] As Figure 1 shown, the refrigeration system 100 includes a compressor unit, a condenser 130, a throttling device 140, and an evaporator 110 that are sequentially connected through pipelines to form a refrigerant circulation loop. The compressor unit includes a first compressor 108 and a second compressor 109. Among them, the displacement (i.e., the refrigerant gas flow rate) of the first compressor 108 is less than that of the second compressor 109. The first compressor 108 and the second compressor 109 are connected in parallel between the condenser 130 and the evaporator 110.

[0070] Specifically, the first compressor 108 is provided with a suction port 141, a discharge port 151, and an oil return port 161. The second compressor 109 is provided with a suction port 142, a discharge port 152, and an oil return port 162. The condenser 130 is provided with a first refrigerant inlet 121, a second refrigerant inlet 122, a refrigerant outlet 124, and an oil outlet 123. The suction port 141 of the first compressor 108 and the suction port 142 of the second compressor 109 are both connected to the outlet of the evaporator 110. The discharge port 151 of the first compressor 108 is connected to the first refrigerant inlet 121 of the condenser 130. The oil return port 161 of the first compressor 108 is connected to the oil outlet 123 of the condenser 130. The discharge port 152 of the second compressor 109 is connected to the second refrigerant inlet 122 of the condenser 130. The oil return port 162 of the second compressor 109 is also connected to the oil outlet 123 of the condenser 130. The refrigerant outlet 124 of the condenser 130 is connected to the throttling device 140.

[0071] The refrigeration system 100 is filled with a refrigerant and a lubricating substance (e.g., lubricating oil). The operation process of the refrigeration system 100 is briefly described below:

[0072] In the first compressor 108 and the second compressor 109, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant flows into the condenser 130 through the first refrigerant inlet 121 and the second refrigerant inlet 122 on the condenser 130 respectively. In the condenser 130, the high-temperature and high-pressure gaseous refrigerant first passes through an oil separation chamber 315 ( Figure 1 , Figure 2 not shown in Figure 3 ), and then releases heat and condenses into a high-pressure liquid refrigerant (possibly containing a part of gaseous refrigerant) in the condensation chamber 316 ( Figure 1 , Figure 2 not shown in Figure 3 ) in the condenser 130. After the high-pressure liquid refrigerant is discharged from the refrigerant outlet 124 of the condenser 130, it flows through the throttling device 140 and is throttled into a low-pressure liquid refrigerant. Subsequently, the low-pressure liquid refrigerant absorbs heat and evaporates into a low-temperature and low-pressure gaseous refrigerant in the evaporator 110 and then returns to the first compressor 108 and the second compressor 109. Thus, the continuous refrigeration cycle is completed in a cycle.

[0073] In the first compressor 108 and the second compressor 109, lubricating oil is used to lubricate the first compressor 108 and the second compressor 109, and then the lubricating oil is discharged from the first compressor 108 and the second compressor 109 together with the gaseous refrigerant. The discharged high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as "mixture") enters the condenser 130. In the oil separation chamber 315 of the condenser 130, the high-pressure gaseous refrigerant is separated from the lubricating oil. The separated high-pressure gaseous refrigerant enters the condensation chamber 316 in the condenser 130 as described above, and the separated lubricating oil flows back to the first compressor 108 and the second compressor 109 through the oil outlet 123 of the condenser 130.

[0074] For ease of description, the condenser 130 in the present application is described by taking a shell-and-tube condenser as an example. However, those skilled in the art can understand that according to the spirit of the present application, the condenser 130 can not only be a shell-and-tube condenser, but also other different forms of condensers. For example, the condenser 130 can also be a shell-and-tube condenser or a double-pipe condenser, etc.

[0075] Figure 2 For Figure 1 Figure 9 is a three-dimensional structural diagram of an embodiment of the condenser 130, which is used to show the external structure of the condenser 130. As Figure 2 shown, the condenser 130 includes a housing 201, the housing 201 is generally cylindrical, and its left and right ends in the length direction are closed by an end plate 202 and an end plate 204. The housing 201 is provided with a first refrigerant inlet 121, a second refrigerant inlet 122, an oil outlet 123 and a refrigerant outlet 124. The first refrigerant inlet 121 and the second refrigerant inlet 122 are located in the upper part of the housing 201 and are respectively arranged close to the left and right ends of the housing 201. The oil outlet 123 and the refrigerant outlet 124 are located at the middle position of the lower part of the housing 201. The condenser 130 further includes a water supply pipe 206 and a water return pipe 207. The water supply pipe 206 and the water return pipe 207 are arranged on the end plate 202 and can be in fluid communication with the condensation device 313 (see details in Figure 3 ) in the condenser 130, so that a cooling medium (for example, water) can flow into and out of the condenser 130.

[0076] The condenser 130 further includes pipes 181, 182, 183, and 184. Among them, pipe 181 is in communication with the first refrigerant inlet 121, so as to facilitate the connection between the first refrigerant inlet 121 and the exhaust port 151 of the first compressor 108. Pipe 182 is in communication with the second refrigerant inlet 122, so as to facilitate the connection between the second refrigerant inlet 122 and the exhaust port 152 of the second compressor 109. Since the displacement of the first compressor 108 is smaller than that of the second compressor 109, the size of the first refrigerant inlet 121 is smaller than that of the second refrigerant inlet 122. Correspondingly, the pipe diameter of pipe 181 is smaller than that of pipe 182. Pipe 183 is in communication with the oil outlet 123, so as to facilitate the connection between the oil outlet 123 and the oil return ports 161 and 162. Pipe 184 is in communication with the refrigerant outlet 124, so as to facilitate the connection between the refrigerant outlet 124 and the throttling device 140.

[0077] It should be noted that according to the specific settings of different condensers, the first refrigerant inlet 121, the second refrigerant inlet 122, the oil outlet 123, and the refrigerant outlet 124 of the condenser can be arranged at different positions. For example, in the embodiment shown in Figure 11 , the first refrigerant inlet 121 and the second refrigerant inlet 122 are arranged in the middle of the housing 201.

[0078] Figure 3 For Figure 2 the cross-sectional view of the condenser 130 along the A-A line in Figure 2 is used to show the general structure inside the condenser 130, and the end plates 202 are omitted. As shown in Figure 3 , there is a cavity 311 inside the housing 201 of the condenser 130. The condenser 130 includes an oil separation partition 337. The oil separation partition 337 is inclinedly arranged inside the housing 201 and extends along the length direction of the housing 201 to connect with the inner wall of the housing 201. The oil separation partition 337 divides the cavity 311 into an oil separation cavity 315 and a condensation cavity 316. Among them, the components (not shown) accommodated in the oil separation cavity 315 can separate the lubricating oil from the gaseous refrigerant. The condensation device 313 accommodated in the condensation cavity 316 can condense the gaseous refrigerant into a liquid refrigerant. At least one communication port 341 is provided in the upper part of the oil separation partition 337, and at least one communication port 341 is used to communicate the oil separation cavity 315 and the condensation cavity 316, so that the gaseous refrigerant separated from the lubricating oil flows from the oil separation cavity 315 into the condensation cavity 316.

[0079] Combined with Figure 2, a first refrigerant inlet 121, a second refrigerant inlet 122, and an oil outlet 123 are in fluid communication with an oil separation chamber 315. A water supply pipe 206, a water return pipe 207, and a refrigerant outlet 124 are in fluid communication with a condensation chamber 316. A condensation device 313 is provided in the condensation chamber 316. As an example, the condensation device 313 in the present application is a heat exchange tube bundle. The heat exchange tube bundle extends along the length direction of the housing 201 and is in fluid communication with the water supply pipe 206 and the water return pipe 207.

[0080] Figures 4A - 4D The first embodiment of the condenser of the present application is shown. Among them, Figure 4A is a cross-sectional view of the first embodiment of the condenser according to the present application along Figure 2 the C-C line in the figure to show the components in the oil separation chamber 315, where the water supply pipe 206 and the water return pipe 207 are omitted; Figure 4B is Figure 4A a three-dimensional structure diagram of the oil separation partition 337, the pipe 181, the pipe 18, and the components in the oil separation chamber 315 in the condenser 430 shown, viewed from the front side; Figure 4C is Figure 4B a three-dimensional structure diagram of the components shown, viewed from the rear side; Figure 4D is Figure 4A a cross-sectional view of the condenser 430 shown along Figure 2 the B-B line in the figure, where the end plate 202 is omitted.

[0081] As Figures 4A - 4D shown, the condenser 430 includes a left sealing plate 471 and a right sealing plate 472. The left sealing plate 471 and the right sealing plate 472 are symmetrically arranged at the left and right ends of the oil separation chamber 315 and are hermetically connected to the housing 201 and the oil separation partition 337.

[0082] The condenser 430 further includes a first diversion partition plate 431. The left end of the first diversion partition plate 431 is connected to the left sealing plate 471, and the first diversion partition plate 431 extends from the left sealing plate 471 towards the middle of the housing 201 along the length direction of the condenser 430 (i.e., the left-right direction). The first diversion partition plate 431 is obliquely arranged at the upper part of the oil separation chamber 315 and is connected to the inner wall of the housing 201. In the radial cross-section of the housing 201, the middle part of the first diversion partition plate 431 is bent towards the condensation chamber 316. A first diversion channel 445 is formed between the first diversion partition plate 431, the left sealing plate 471 and the housing 201. The radial cross-section of the first diversion channel 445 formed by the first diversion partition plate 431 and the housing 201 is substantially arcuate. The first diversion channel 445 has an inlet 445a and an outlet 445b. The inlet 445a is located at the left end of the first diversion channel 445 and is in fluid communication with the first refrigerant inlet 121. The outlet 445b is located at the right end of the first diversion channel 445. In the oil separation chamber 315, the cavity located below the first diversion channel 445 is designed to be large enough to fully separate the lubricating oil and the gaseous refrigerant.

[0083] As a more specific embodiment, as Figure 4D shown, in the radial cross-section of the housing 201, the middle part of the first diversion partition plate 431 is bent towards the inside of the housing 201 to form a mutually connected upper plate 426 and a lower plate 427, which form an included angle. When the connection position between the first diversion partition plate 431 and the housing 201 is fixed, setting the middle part of the first diversion partition plate 431 to be bent towards the condensation chamber 316 can increase the radial cross-sectional area of the first diversion channel 445.

[0084] Similarly, the condenser 430 further includes a second flow guiding partition 432. The right end of the second flow guiding partition 432 is connected to the right sealing plate 472, and the second flow guiding partition 432 extends from the right sealing plate 472 towards the middle of the housing 201 along the length direction of the condenser 430 (i.e., the left-right direction). The second flow guiding partition 432 is inclinedly disposed at the upper part of the oil separation chamber 315 and is connected to the inner wall of the housing 201. In the radial cross-section of the housing 201, the middle part of the second flow guiding partition 432 also bends towards the condensation chamber 316. As a more specific embodiment, the shape of the second flow guiding partition 432 is the same as that of the first flow guiding partition 431. A second flow guiding channel 446 is formed between the second flow guiding partition 432, the right sealing plate 472 and the housing 201. The radial cross-section of the second flow guiding channel 446 formed by the second flow guiding partition 432 and the housing 201 is substantially bow-shaped. The second flow guiding channel 446 has an inlet 446a and an outlet 446b. The inlet 446a is located at the right end of the second flow guiding channel 446 and is in fluid communication with the second refrigerant inlet 122. The outlet 446b is located at the left end of the second flow guiding channel 446. In the oil separation chamber 315, the cavity located below the second flow guiding channel 446 is designed to be large enough to fully separate the lubricating oil and the gaseous refrigerant.

[0085] As Figures 4A - 4C shown, the condenser 430 further includes a blocking member 434. The blocking member 434 is disposed between the outlet 445b of the first flow guiding channel 445 and the outlet 446b of the second flow guiding channel 446 for separating the outlet 445b and the outlet 446b. Specifically, the blocking member 434 is a blocking plate and is generally fan-shaped, and the arc shape at its top matches the arc shape of the housing 201 so that the blocking member 434 can be connected to the housing 201. The radial cross-sectional area of the blocking member 434 is set to be substantially the same as the areas of the outlet 445b and the outlet 446b, so that in the length direction of the housing 201, at least the outlet 445b and the outlet 446b can be partially blocked. Such a setting can prevent the outlet 445b and the outlet 446b from being directly opposite each other, thereby avoiding the mixture flowing out of one flow guiding channel from flowing into the other flow guiding channel due to a large speed.

[0086] After the mixtures flow into the condenser 430 through the first flow guiding channel 445 and the second flow guiding channel 446 respectively, the mixture flowing in from the first flow guiding channel 445 will not immediately contact the mixture flowing in from the second flow guiding channel 446, but changes its flow direction after being blocked by the blocking member 434 and is mixed substantially at the mixing region 450 (shown in Figure 4A with dotted shading).

[0087] It should be noted that the outlet 445b of the first diversion channel 445, the outlet 446b of the second diversion channel 446, and the blocking member 434 are jointly arranged such that the mixture flowing out from the outlet 445b and the outlet 446b can be mixed approximately near the mixing region 450.

[0088] The mixing region 450 mentioned above only schematically represents the approximate gas mixing part, rather than a physical division. In different embodiments, the position and size of the mixing region 450 may be different. However, according to the property that the mixture will diffuse immediately after flowing out of the outlet, the mixing region 450, the outlet 445b of the first diversion channel 445, and the outlet 446b of the second diversion channel 446 should be close to each other.

[0089] Those skilled in the art should understand that the outlet of the first diversion channel and the outlet of the second diversion channel may not be set to be completely opposite, but may be set to rotate to stagger a certain angle, or be spaced apart by a certain distance in the front-back or up-down direction, as long as it is ensured that these two outlets are close to each other so that the refrigerant flowing out of the outlets can be mixed. In some embodiments, since the outlet of the first diversion channel and the outlet of the second diversion channel are not set to be opposite, the blocking member 434 can be of any shape, or the blocking member may not be provided, as Figures 8 - 11 shown in the illustrated embodiment.

[0090] As Figures 4B - 4C shown, at least one communication port 341 includes a left communication port 441 and a right communication port 442, which are respectively arranged at the upper parts of the left and right ends of the oil separation partition 337 to communicate the oil separation chambers 315 and the condensation chambers 316 on both sides of the oil separation partition 337. The left communication port 441 and the right communication port 442 are both square openings, and the sizes of the openings are the same.

[0091] The condenser 430 further includes a first filter screen 475 and a second filter screen 476, which are arranged in the oil separation chamber 315. Specifically, the first filter screen 475 is arranged between the left communication port 441 and the outlet 445b, and is close to the left communication port 441. The second filter screen 476 is arranged between the right communication port 442 and the outlet 446b, and is close to the right communication port 442. The first filter screen 475 and the second filter screen 476 both extend in the radial direction of the condenser 430 in the oil separation chamber 315 (i.e., the filter screen needs to be connected to the diversion partition, the oil separation partition, and the housing), so that the mixture needs to pass through the first filter screen 475 or the second filter screen 476 before flowing from the outlet 445b or the outlet 446b to the left communication port 441 or the right communication port 442, and further preventing the lubricating oil in the mixture from being discharged from the left communication port 441 or the right communication port 442 to the condensation chamber 316.

[0092] Next, in combination with Figure 4ADescribe in detail the working principle of each component in the oil separation chamber 315. Figure 4A The arrows in Figure 4A indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0093] Specifically, the high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as the "first mixture") discharged by the first compressor 108 enters the oil separation chamber 315 through the first refrigerant inlet 121. The first mixture flows along the first diversion channel 445 defined by the first diversion partition 431 and flows to the outlet 445b in a substantially horizontal direction. The high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as the "second mixture") discharged by the second compressor 109 enters the oil separation chamber 315 through the second refrigerant inlet 122. The second mixture flows along the second diversion channel 446 defined by the second diversion partition 432 and flows to the outlet 446b in a substantially horizontal direction. The first mixture and the second mixture respectively change their flow directions to downward flow after hitting the blocking member 434 from the left and the right. Since there is no longer the blocking of the blocking member 434, the first mixture and the second mixture are roughly mixed with each other at the mixing area 450 while flowing downward.

[0094] In the condenser 430, on the one hand, the pressure in the condensation chamber 316 is less than the pressure in the oil separation chamber 315, so the mixture in the oil separation chamber 315 will flow towards the condensation chamber 316. On the other hand, since both the left communication port 441 and the right communication port 442 are communicated with the condensation chamber 316, the pressures at the left communication port 441 and the right communication port 442 are roughly the same, and the sizes of the left communication port 441 and the right communication port 442 are also roughly the same. Therefore, when the first mixture and the second mixture are roughly mixed with each other at the mixing area 450, they will be divided into two mixtures with roughly the same flow rate under the action of pressure and flow towards the left communication port 441 and the right communication port 442 respectively.

[0095] Since the components in the condenser 430 are arranged in a substantially left-right symmetric manner, the flow directions of the two mixtures are also similar. For the sake of concise description, in this application, a mixture flowing to the left after mixing is taken as an example to describe the flow of this mixture. Specifically, this mixture flows towards the left and passes through the first filter screen 475. The first filter screen 475 has fine pores, and the lubricating oil in the mixture will adhere to the first filter screen 475, thereby separating the lubricating oil from the gaseous refrigerant. On the one hand, since the pressure in the condensation chamber 316 is less than the pressure in the oil separation chamber 315, the gaseous refrigerant continues to flow towards the left communication port 441. On the other hand, the lubricating oil adhering to the first filter screen 475 deposits at the bottom of the oil separation chamber 315 under the action of gravity and is discharged from the oil separation chamber 315 through the oil outlet 123 located at the bottom of the oil separation chamber 315.

[0096] It should be noted that in order to prevent the mixture from directly impacting the first diversion partition 431 and the second diversion partition 432 when entering the oil separation chamber 315 due to excessive flow velocity, impact prevention members 438 and 439 can be respectively provided on the first diversion partition 431 and the second diversion partition 432. Specifically, the impact prevention members 438 and 439 can be respectively provided at corresponding positions of the first diversion partition 431 and the second diversion partition 432 facing the first refrigerant inlet 121 and the second refrigerant inlet 122. As an example, the impact prevention member can be a filter screen.

[0097] It should also be noted that in order to prevent the flow velocity of the mixture in the oil separation chamber 315 from being too large and disturbing the liquid level of the lubricating oil deposited in the oil separation chamber 315, a baffle (not shown) can also be provided in the oil separation chamber 315. The baffle is connected between the oil separation partition 337 and the housing 201 between the first filter screen 475 and the second filter screen 476, and is configured to be disposed substantially horizontally above the liquid level of the lubricating oil, so that the lubricating oil can flow down along the filter screen and be deposited at the bottom of the oil separation chamber 315, while the flow of the mixture does not impact the liquid level of the lubricating oil.

[0098] In a traditional condenser with an oil separation function, since the displacement of the first compressor 108 is smaller than that of the second compressor 109, the size of the oil separation chamber in the traditional condenser is designed according to the displacement of the large-displacement compressor (i.e., the second compressor 109). The size of this oil separation chamber is too large for the small-displacement compressor (i.e., the first compressor 108), resulting in waste.

[0099] In the present application, when the displacement of the first compressor 108 is smaller than that of the second compressor 109, the condenser 430 can mix the gaseous refrigerant and lubricating oil mixture discharged from the first compressor 108 and the second compressor 109 in the oil separation chamber 315, and then divide it into two uniform strands for filtration. Therefore, the condenser 430 can meet the requirements of sufficient filtration and separation of the gaseous refrigerant and lubricating oil without designing the size of the oil separation chamber 315 according to the displacement of the large-displacement compressor (i.e., the second compressor 109). This can make the size of the oil separation chamber 315 smaller, and thus make the overall size of the condenser 430 smaller.

[0100] As an example, the size of the oil separation chamber 315 can be designed according to the average displacement of the large-displacement compressor (i.e., the second compressor 109) and the small-displacement compressor (i.e., the first compressor 108).

[0101] Figure 5 For a second embodiment of the condenser according to the present application along Figure 2 the sectional view taken along the C-C line in the figure to show the various components in the oil separation chamber 315. Figure 5The arrow in [the figure] indicates the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0102] Specifically, the structure of the condenser 530 is generally the same as that of the condenser 430 shown in Figures 4A - 4C The difference between the condenser 530 and the condenser 430 is that: in the embodiment shown in Figure 5 the blocking member is a filter screen 534 instead of a blocking plate. The filter screen 534 has fine pores, but it can still prevent the second mixture discharged from the second compressor 109 from entering the second diversion channel 446. In addition, the first mixture and the second mixture can still be mixed in the mixing area 550 near the filter screen 534, and then evenly divided into two streams, and after separating the lubricating oil through the first filter screen 475 and the second filter screen 476 respectively, they flow into the condensation chamber 316 for condensation. In this embodiment, the filter screen 534 also has the function of adsorbing and separating the lubricating oil in the mixture.

[0103] Figure 6 is a sectional view of the third embodiment of the condenser of the present application along Figure 2 the C-C line in [the figure] to show the components in the oil separation chamber 315. Figure 6 The arrow in [the figure] indicates the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0104] Specifically, the structure of the condenser 630 is generally the same as that of the condenser 430 shown in Figures 4A - 4C The difference between the condenser 630 and the condenser 430 is that the specific structures of the first diversion partition 631 and the second diversion partition 632 at the inlet are different. As shown in Figure 6 in the condenser 630, the first diversion partition 631 near the first refrigerant inlet 121 and the second diversion partition 632 near the second refrigerant inlet 122 are designed in the shape of a box with an open top. The first diversion channel 645 is formed by the first diversion partition 631 and the housing 201, and the second diversion channel 646 is formed by the second diversion partition 632 and the housing 201. In this way, the diversion channels can be formed only by the diversion partitions and the housing, without the need for a left sealing plate and a right sealing plate to respectively define the first diversion channel 645 and the second diversion channel 646, thereby simplifying the assembly steps of the condenser 630.

[0105] Specifically, the left end of the first diversion partition 631 is in the shape of a box with an open top. The right side of the box extends towards the middle of the housing 201 along the length direction of the housing 201 to form the first diversion channel 645. The right end of the second diversion partition 632 is in the shape of a box with an open top. The left side of the box extends towards the middle of the housing 201 along the length direction of the housing 201 to form the second diversion channel 646.

[0106] The left end of the first flow guiding partition plate 631 and the right end of the second flow guiding partition plate 632 are designed in the shape of a box with an open top, which can increase the radial area of the flow guiding channel near the first refrigerant inlet 121 and the second refrigerant inlet 122, thereby reducing the velocity of the mixture after it enters the condenser 630, so as to reduce the impact of the mixture on the flow guiding partition plate. Thus, in this embodiment, an impact prevention member may not be provided.

[0107] Figure 7 This is a sectional view of the fourth embodiment of the condenser of the present application along Figure 2 the C-C line in the figure, showing the components in the oil separation chamber 315. Figure 7 The arrows in the figure indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0108] Specifically, the structure of the condenser 730 is generally the same as that of the condenser 430 shown in Figures 4A - 4C the figure. The difference between the condenser 730 and the condenser 430 is that: in the embodiment shown in Figure 7 the figure, the first flow guiding channel 745 and the second flow guiding channel 746 are respectively formed by pipes. As shown in Figure 7 the figure, the first flow guiding channel 745 is formed by the first flow guiding pipe 735, and the second flow guiding channel 746 is formed by the second flow guiding pipe 736. As an example, the first flow guiding pipe 735 passes through the first refrigerant inlet 121 arranged on the housing 201 and extends upward to be connected to the exhaust port 151 of the first compressor 108. The second flow guiding pipe 736 passes through the second refrigerant inlet 122 arranged on the housing 201 and extends upward to be connected to the exhaust port 152 of the second compressor 109.

[0109] In this embodiment, the flow guiding channel is directly formed by the flow guiding pipe to limit the flow path of the mixture after it enters the flow guiding channel, and there is no need to additionally provide a left sealing plate 471 and / or a right sealing plate 472 as shown in Figures 4A - 4C the figure.

[0110] It should be noted that since the flow guiding channel is formed by the flow guiding pipe, the first filter screen 775 and the second filter screen 776 need to be connected to the flow guiding pipe, the oil separation partition plate and the housing so that the mixture flows into the condensation chamber 316 after passing through the first filter screen 775 or the second filter screen 776.

[0111] Figure 8 This is a sectional view of the fifth embodiment of the condenser of the present application along Figure 2 the C-C line in the figure, showing the components in the oil separation chamber 315. Figure 8 The arrows in the figure indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315. As shown in Figure 8As shown, the first diversion channel 845 and the second diversion channel 846 in the condenser 830 are respectively formed by pipes.

[0112] Specifically, the first diversion channel 845 is formed by a diversion straight pipe 864, which extends upward through the first refrigerant inlet 121 arranged on the housing 201 to be connected to the exhaust port 151 of the first compressor 108. The outlet 845b of the first diversion channel 845 is arranged at the lower end of the first diversion channel 845.

[0113] The second diversion channel 846 is formed by a diversion partition 863 and the housing 201. The diversion partition 863 is at a certain distance from the top of the housing 201 and horizontally extends along the length direction of the housing 201. The second diversion channel 846 is in fluid communication with the second refrigerant inlet 122. Among them, the second diversion channel 846 has an outlet 846b arranged at its left end and an additional outlet 843 arranged at its right end. The outlet 846b is arranged close to the outlet 845b of the first diversion channel 845. The additional outlet 843 is arranged far from the outlet 845b of the first diversion channel 845. After the mixture flows into the second diversion channel 846 from the second refrigerant inlet 122, a part of the mixture flows out through the additional outlet 843, and another part of the mixture flows from right to left and flows out from the outlet 846b. The mixture flowing out from the outlet 845b of the first diversion channel 845 is mixed with the mixture flowing out from the outlet 846b near the mixing area 850.

[0114] In the embodiment as Figure 8 shown, the condenser 830 only includes a communication port 841, which is arranged in the middle of the oil separation partition 337. The condenser 830 also includes a first filter screen 875 and an additional filter screen 877. The first filter screen 875 is arranged between the outlet 846b of the second diversion channel 846 and the communication port 841, and the additional filter screen 877 is arranged between the additional outlet 843 of the second diversion channel 846 and the communication port 841.

[0115] The mixture mixed at the mixing area 850 flows through the first filter screen 875 from left to right. When passing through the first filter screen 875, the gaseous refrigerant is separated from the lubricating oil. The gaseous refrigerant separated from the lubricating oil enters the condensation chamber from the communication port 841. The lubricating oil deposits at the bottom of the oil separation chamber 315 due to gravity. And the mixture flowing out from the additional outlet 843 impacts the right end plate 204 on the right side of the housing 201 and then flows through the additional filter screen 877 from right to left. When passing through the additional filter screen 877, the gaseous refrigerant is separated from the lubricating oil. The gaseous refrigerant separated from the lubricating oil enters the condensation chamber from the communication port 841. The lubricating oil deposits at the bottom of the oil separation chamber 315 due to gravity.

[0116] In this embodiment, the mixture discharged from the high-displacement compressor (i.e., the second compressor 109) is divided into two parts. One part directly flows through the additional filter screen 877, and the other part is mixed with the gaseous refrigerant discharged from the low-displacement compressor (i.e., the first compressor 108) and then flows through the first filter screen 875. By designing the size of the additional outlet 843, the flow rates of the mixtures flowing through the additional filter screen 877 and the first filter screen 875 can be made substantially equal, so that the flow rate of the mixture can be automatically distributed into two equal parts for filtration. This can also make the size of the oil separation chamber 315 smaller, thereby making the overall size of the condenser 430 smaller.

[0117] It should be noted that in this embodiment, since the outlets of the first diversion channel 845 and the second diversion channel 846 are not directly opposite to each other, the mixture flowing out of one of the diversion channels can be prevented from flowing into the other diversion channel due to its relatively high speed without setting a blocking member.

[0118] Figure 9 The sixth embodiment of the condenser of the present application is a sectional view along Figure 2 the C-C line in the figure to show the components in the oil separation chamber 315. Figure 9 The arrows in the figure indicate the flow routes of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0119] Specifically, the structure of the condenser 930 is generally the same as that of the condenser 730 shown in Figure 7 . The difference between the condenser 930 and the condenser 730 is that the specific settings of the first diversion pipe 735 and the second diversion pipe 736 in the height direction are different. As shown in Figure 9 , the outlet 945b of the first diversion channel 945 of the condenser 930 is disposed opposite to the outlet 946b of the second diversion channel 946, and is offset by a certain distance in the height direction, so that in the height direction, the outlet 946b is below the outlet 945b. Therefore, in this embodiment, the mixture flowing out of one of the diversion channels can be prevented from flowing into the other diversion channel due to its relatively high speed without setting a blocking member.

[0120] Those skilled in the art should know that in other embodiments, by setting the outlet 945b of the first diversion channel 945 and the outlet 946b of the second diversion channel 946 to be offset by a certain distance in other directions perpendicular to the length direction of the housing, the mixture flowing out of one of the diversion channels can be prevented from flowing into the other diversion channel due to its relatively high speed.

[0121] Figure 10 The seventh embodiment of the condenser of the present application is a sectional view along Figure 2 the C-C line in the figure to show the components in the oil separation chamber 315.Figure 10 The arrow in [it] indicates the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0122] Specifically, the structure of the condenser 1030 is generally the same as that of the condenser 930 shown in Figure 9 . The difference between the condenser 1030 and the condenser 930 lies in that the setting positions of the outlet 1045b of the first diversion channel 1045 and the outlet 1046b of the second diversion channel 1046 are different. As shown in Figure 10 , the first diversion channel 1045 and the second diversion channel 1046 of the condenser 1030 each extend from both ends of the housing 201 towards the middle and cross each other, that is, the outlet 1045b of the first diversion channel 1045 is on the right side of the outlet 1046b of the second diversion channel 1046. In other words, the outlet 1045b of the first diversion channel 1045 is between the outlet 1046b of the second diversion channel 1046 and the inlet 1046a of the second diversion channel 1046, and the outlet 1046b of the second diversion channel 1046 is between the outlet 1045b of the first diversion channel 1045 and the inlet 1045a of the first diversion channel 1045. At this time, even without setting a blocking member, it can be avoided that the mixture flowing out of one of the diversion channels rushes into the other diversion channel due to a relatively high speed.

[0123] Figure 11 This is a sectional view of the eighth embodiment of the condenser of the present application along the Figure 2 C-C line in [it] to show the components in the oil separation chamber 315. Figure 11 The arrow in [it] indicates the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

[0124] As shown in Figure 11As shown, the first diversion channel 1145 and the second diversion channel 1146 of the condenser 1130 are vertical channels respectively formed by the diversion straight pipes 1164 and 1169. The diversion straight pipes 1164 and 1169 are arranged side by side in the middle of the housing 201. The diversion straight pipe 1164 passes through the first refrigerant inlet 121 arranged on the housing 201 and extends upward to be connected to the exhaust port 151 of the first compressor 108. The diversion straight pipe 1169 passes through the second refrigerant inlet 122 arranged on the housing 201 and extends upward to be connected to the exhaust port 152 of the second compressor 109. The outlet 1145b of the first diversion channel 1145 is arranged at the lower end of the first diversion channel 1145. The outlet 1146b of the second diversion channel 1146 is arranged at the lower end of the second diversion channel 1146. As an example, the outlets of the first diversion channel 1145 and the second diversion channel 1146 are arranged back to back. Thus, after the mixture flows into the first diversion channel 1145 and the second diversion channel 1146 from the first refrigerant inlet 1121 and the second refrigerant inlet 1122 respectively, it can flow downward into the oil separation chamber 315 and reach the mixing area 1150 below their respective outlets for mixing.

[0125] Similar to the embodiment as Figures 4A - 4C shown, the condenser 1130 further includes a first filter screen 1175, a second filter screen 1176, a left communication port 441 and a right communication port 442, wherein the left communication port 441 and the right communication port 442 are arranged at the left and right ends of the oil separation partition 337. The mixed mixture is evenly divided into two parts. One part flows through the first filter screen 1175 to separate lubricating oil. Subsequently, the gaseous refrigerant separated from the lubricating oil flows into the condensation chamber from the left communication port 441. The other part flows through the second filter screen 1176 to separate lubricating oil. Subsequently, the gaseous refrigerant separated from the lubricating oil flows into the condensation chamber from the right communication port 442.

[0126] Since the outlets of the first diversion channel 1145 and the second diversion channel 1146 are arranged back to back (not facing each other), there is no need to provide a blocking member either.

[0127] In the above embodiments, although diversion channels with different structures are designed, they can all control the flow path of the mixture so that at least a part of the mixture from the large-displacement compressor can be mixed and evenly distributed with the mixture from the small-displacement compressor before filtration, so that the size of the oil separation chamber does not need to be designed according to the displacement of the large-displacement compressor, and the requirement of sufficient filtration and separation of lubricating oil can be met. The condenser of the present application can reduce the size requirement of the oil separation chamber, and thus reduce the size requirement of the condenser.

[0128] Figure 12The structural block diagram of another embodiment of the refrigeration system of the present application is used to show the connection relationships of various components in the refrigeration system including an independent oil separation device. In this embodiment, the condenser does not have an oil separation function. As Figure 12 shown, the refrigeration system 1200 includes a compressor unit, a condenser 1230, a throttling device 140, and an evaporator 110 that are sequentially connected through pipelines to form a refrigerant circulation loop. An oil separation device 1283 is further provided between the compressor unit and the condenser 1230. The compressor unit includes a first compressor 1208 and a second compressor 1209. In this embodiment, the displacement (i.e., refrigerant gas flow rate) of the first compressor 1208 is less than that of the second compressor 1209. The first compressor 1208 and the second compressor 1209 are connected in parallel between the oil separation device 1283 and the evaporator 110.

[0129] Specifically, the first compressor 1208 is provided with a suction port 1291, a discharge port 1251, and an oil return port 1261. The second compressor 1209 is provided with a suction port 1292, a discharge port 1252, and an oil return port 1262. The oil separation device 1283 is provided with a first refrigerant inlet 1221, a second refrigerant inlet 1222, an oil outlet 1223, and at least one communication port (i.e., the refrigerant gas outlet of the oil separation device). As an example, the at least one communication port includes two communication ports (i.e., the refrigerant gas outlets of the oil separation device) 1241 and 1242. The suction port 1291 of the first compressor 1208 and the suction port 1292 of the second compressor 1209 are both connected to the outlet of the evaporator 110. The discharge port 1251 of the first compressor 1208 is connected to the first refrigerant inlet 1221 of the oil separation device 1283. The oil return port 1261 of the first compressor 1208 is connected to the oil outlet 1223 of the oil separation device 1283. The discharge port 1252 of the second compressor 1209 is connected to the second refrigerant inlet 1222 of the oil separation device 1283. The oil return port 1262 of the second compressor 1209 is also connected to the oil outlet 1223 of the oil separation device 1283. The inlet of the condenser 1230 is connected to the communication ports 1241 and 1242, and the refrigerant outlet 124 of the condenser 1230 is connected to the throttling device 140.

[0130] The refrigeration system 100 is filled with a refrigerant and a lubricating substance (e.g., lubricating oil). The operation process of the refrigeration system 1200 is briefly described below:

[0131] In the first compressor 1208 and the second compressor 1209, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant respectively passes through the first refrigerant inlet 1221 and the second refrigerant inlet 1222 on the oil separation device 1283, first passes through the oil separation device 1283, and then flows into the condenser 1230 to release heat and is condensed into a high-pressure liquid refrigerant (which may contain a part of gaseous refrigerant). After the high-pressure liquid refrigerant is discharged from the refrigerant outlet 124 on the condenser 1230, it flows through the throttling device 140 and is throttled into a low-pressure liquid refrigerant. Subsequently, the low-pressure liquid refrigerant absorbs heat in the evaporator 110 and is evaporated into a low-pressure gaseous refrigerant, and then returns to the first compressor 1208 and the second compressor 1209. In this way, the continuous refrigeration cycle is completed.

[0132] In the first compressor 1208 and the second compressor 1209, lubricating oil is used to lubricate the first compressor 1208 and the second compressor 1209. Subsequently, the lubricating oil will be discharged from the first compressor 1208 and the second compressor 1209 together with the gaseous refrigerant. The discharged high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as "mixture") enters the oil separation device 1283. In the oil separation chamber 1315 (not shown, see Figure 13 ) of the oil separation device 1283, the high-pressure gaseous refrigerant is separated from the lubricating oil. The separated high-pressure gaseous refrigerant enters the condenser 1230 as described above, and the separated lubricating oil flows back to the first compressor 1208 and the second compressor 1209 through the oil outlet 1223 on the oil separation device 1283.

[0133] Figure 13 For Figure 12 shown is a three-dimensional structural diagram of an embodiment of the oil separation device 1283. As Figure 13 shown, the oil separation device 1283 includes a housing 1301, and an oil separation chamber 1315 is included inside the housing 1301. The housing 1301 is provided with a first refrigerant inlet 1221, a second refrigerant inlet 1222, an oil outlet 1223, and communication ports 1241 and 1242. As a specific example, the first refrigerant inlet 1221 and the second refrigerant inlet 1222 are located at the upper part of the housing 1301 and are respectively arranged close to the left and right ends of the housing 1301, the oil outlet 1223 is arranged at the lower part of the housing 1301, and the communication ports 1241 and 1242 are respectively arranged at the left and right ends of the housing 1301.

[0134] The oil separation device 1283 further includes pipelines 1281, 1282, 1284, 1285 and 1286. Among them, pipeline 1281 is communicated with the first refrigerant inlet 1221, so as to connect the first refrigerant inlet 1221 with the exhaust port 1251 of the first compressor 1208. Pipeline 1282 is communicated with the second refrigerant inlet 1222, so as to connect the second refrigerant inlet 1222 with the exhaust port 1252 of the second compressor 1209. Pipeline 1284 is communicated with the oil outlet 1223, so as to connect the oil outlet 1223 with the oil return ports 1261 and 1262. Pipelines 1285 and 1286 are respectively communicated with the communication ports 1241 and 1242, so as to connect the communication ports 1241 and 1242 with the condenser 1230.

[0135] It should be noted that according to the specific settings of different oil separation devices, the first refrigerant inlet 1221, the second refrigerant inlet 1222, the oil outlet 1223 and the communication ports 1241 and 1242 of the oil separation device can be arranged at different positions. For example, in the Figure 21 shown embodiment, the first refrigerant inlet 1221 and the second refrigerant inlet 1222 are arranged in the middle of the housing 201. And at least one communication port may not include two communication ports. For example, in the Figure 18 shown embodiment, only one communication port is included.

[0136] Inside the oil separation chamber 1315 of the oil separation device 1283, there are also a first diversion partition 1331, a second diversion channel 1332, a blocking member 1334, a first filter screen 1375 and a second filter screen 1376. Among them, the first diversion partition 1331 and the housing 1301 form a first diversion channel 1345, and the second diversion partition 1332 and the housing 1301 form a second diversion channel 1346.

[0137] Figure 14 For Figure 13 [[ID=S16]]the first embodiment of the oil separation device 1283 in Figure 13 is a sectional view along the D-D line in Figure 14 for showing the specific structure inside the oil separation chamber 1315. As Figures 4A - 4C shown, the specific structure inside the oil separation chamber 1315 is generally the same as the specific structure inside the oil separation chamber 315 of the condenser 430 in

[0138] Specifically, the high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as the "first mixture") discharged from first compressor 1208 enters oil separation chamber 1315 and flows approximately horizontally along first guide channel 1345 to outlet 1345b. The high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as the "second mixture") discharged from second compressor 1209 enters oil separation chamber 1315 and flows approximately horizontally along second guide channel 1346 to outlet 1346b. The first and second mixtures, after striking blocking member 1334 from the left and right sides, change direction and flow downward, mixing approximately in mixing area 1450. They are then evenly divided into two parts. After filtering and separating the lubricating oil through first filter 1375 and second filter 1376, they flow through connecting ports 1241 and 1242 into the condenser for condensation.

[0139] Figure 15 The second embodiment of the oil separation device of this application is along Figure 13 Cross-sectional view of the DD line. Figure 15 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 5 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14 The difference between the oil separation device in Figure 15 In the illustrated embodiment, the blocking member is a filter 1534 instead of a blocking plate, and the mixing area 1550 of the gaseous refrigerant is approximately near the filter 1534.

[0140] Figure 16 The third embodiment of the oil separation device of the present application is along Figure 13 Cross-sectional view of the DD line. Figure 16 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 6 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14 The difference between the oil separation device in FIG. 1 and FIG. 2 is that the left end of the first guide baffle 1631 and the right end of the second guide baffle 1632 are designed to be in the shape of a box with an open top.

[0141] Figure 17 The fourth embodiment of the oil separation device of the present application is along Figure 13 Cross-sectional view of the DD line. Figure 17 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 7 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14 The difference between the oil separation device in FIG. 1 and FIG. 2 is that the first guide channel 1745 and the second guide channel 1746 are respectively formed by guide pipes.

[0142] Figure 18 The fifth embodiment of the oil separation device of the present application is along Figure 13 Cross-sectional view of the DD line. Figure 18 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 8 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14 The oil separation device in the embodiment differs in that: the first flow diversion channel 1845 is formed by a straight flow diversion pipe 1864, and the outlet 1845b of the first flow diversion channel 1845 is located at the lower end of the first flow diversion channel 1845. The second flow diversion channel 1846 is formed by a flow diversion baffle 1863 and the housing 1301. The second flow diversion channel 1846 has an outlet 1846b located at its left end and an additional outlet 1843 located at its right end. The outlet 1846b of the second flow diversion channel 1846 is close to the outlet 1845b of the first flow diversion channel 1845, while the additional outlet 1843 of the second flow diversion channel 1846 is located away from the outlet 1845b of the first flow diversion channel 1845.

[0143] In such Figure 18 In the illustrated embodiment, the oil separation device includes only one connecting port 1841, which is arranged on the rear side of the middle portion of the housing of the oil separation device, the first filter 1875 is arranged between the outlet 1846b of the second guide channel 1846 and the connecting port 1841, and the additional filter 1877 is arranged between the additional outlet 1843 of the second guide channel 1846 and the connecting port 1841.

[0144] Figure 19 The sixth embodiment of the oil separation device of the present application is along Figure 13 Cross-sectional view of the DD line. Figure 19 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 19 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14 The difference between the oil separation device in FIG. 1 and FIG. 2 is that the outlet of the first guide channel 1945 and the outlet of the second guide channel 1946 are arranged opposite to each other and are staggered by a distance in the height direction.

[0145] Figure 20 The seventh embodiment of the oil separation device of the present application is along Figure 13 Cross-sectional view of the DD line. Figure 20 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 10 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14The difference between the oil separation device in FIG. 2 is that the first guide channel 2045 and the second guide channel 2046 extend from both ends of the housing of the oil separation device toward the middle and cross each other.

[0146] Figure 21 The eighth embodiment of the oil separation device of the present application is along Figure 13 Cross-sectional view of the DD line. Figure 21 As shown, the specific structure inside the oil separation chamber of the oil separation device is roughly the same as Figure 11 The specific structure of the oil separation chamber of the condenser shown in is roughly the same as that of Figure 14 The difference between the oil separation device in the embodiment is that the first guide channel 2145 and the second guide channel 2146 are vertical channels formed by the guide straight pipe 2164 and the guide straight pipe 2169 respectively, which extend longitudinally side by side from the middle of the shell of the oil separation device to the oil separation chamber 1315.

[0147] Similar to the aforementioned condenser, when the displacement of first compressor 1208 is smaller than that of second compressor 1209, oil separation device 1283 allows the mixture of gaseous refrigerant and lubricating oil discharged from first and second compressors 1208, 1209 to mix in oil separation chamber 1315, subsequently separating the mixture into two uniform streams for filtration. Therefore, oil separation device 1283 can achieve sufficient filtration and separation of gaseous refrigerant and lubricating oil without having to design the size of oil separation chamber 1315 based on the displacement of the larger-displacement compressor (i.e., second compressor 1209). This allows the size of oil separation chamber 1315 to be smaller, thereby reducing the overall size of oil separation device 1283.

[0148] It can be seen that, especially for a refrigeration system including two compressors with unequal displacements, the condenser of the present application can be set to a smaller size than the existing condenser with a built-in oil separation component; and the oil separation device of the present application can also be set to a smaller size than the existing oil separation device.

[0149] Although the present application will be described with reference to specific embodiments shown in the accompanying drawings, it should be understood that many variations of the condenser and oil separation device of the present application are possible without departing from the spirit, scope, and context of the teachings of the present application. Those skilled in the art will also recognize that there are many ways to modify the structural details of the embodiments disclosed in the present application, all of which fall within the spirit and scope of the present application and the claims.

Claims

1. An oil separation device, characterized in that: The oil separation device includes: a housing, within which an oil separation chamber is included; a first refrigerant inlet and a second refrigerant inlet, which are provided on the housing; a first diversion channel, which is provided in the oil separation chamber, the first diversion channel having an inlet and an outlet, the inlet of the first diversion channel being in fluid communication with the first refrigerant inlet to divert at least a portion of the refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion channel to the outlet of the first diversion channel; a second diversion channel, which is provided in the oil separation chamber, the second diversion channel having an inlet and an outlet, the inlet of the second diversion channel being in fluid communication with the second refrigerant inlet to divert at least a portion of the refrigerant gas entering the second refrigerant inlet from the inlet of the second diversion channel to the outlet of the second diversion channel; and two communication ports, each of the two communication ports being for fluid communication with a condensing device, and the two communication ports being respectively provided at opposite ends in the length direction of the housing; wherein the first diversion channel and the second diversion channel are configured such that the refrigerant gas flowing out of the outlet of the first diversion channel can be mixed with the refrigerant gas flowing out of the outlet of the second diversion channel.

2. The oil separation device according to claim 1, wherein: the outlet of the first diversion channel and the outlet of the second diversion channel are close to each other.

3. The oil separation device according to claim 2, characterized in that: The oil separation device further includes: at least one filter screen, which is provided transversely to the length direction of the housing in the oil separation chamber; wherein the at least one filter screen is provided between the communication port and the outlets of the first diversion channel and the second diversion channel that are close to each other, so that the mixed refrigerant gas can flow through the at least one filter screen to reach the communication port.

4. The oil separation device according to claim 3, wherein: the at least one filter screen includes a first filter screen and a second filter screen; wherein the first filter screen is provided between the outlet of the first diversion channel and one of the two communication ports; the second filter screen is provided between the outlet of the second diversion channel and the other of the two communication ports.

5. The oil separation device according to claim 1, wherein: the first diversion channel and the second diversion channel extend from opposite ends in the length direction of the housing towards the middle of the housing along the length direction of the housing; wherein the outlets of the first diversion channel and the second diversion channel are arranged to be spaced apart by a certain distance in the length direction of the housing, or to be offset by a certain distance in a direction perpendicular to the length direction of the housing.

6. The oil separation device according to claim 5, wherein: The outlet of the first diversion channel is disposed between the outlet of the second diversion channel and the inlet of the first diversion channel; and The outlet of the second diversion channel is disposed between the outlet of the first diversion channel and the inlet of the second diversion channel.

7. The oil separation device according to claim 5, wherein: The outlet of the first diversion channel is disposed between the outlet of the second diversion channel and the inlet of the second diversion channel; and The outlet of the second diversion channel is disposed between the outlet of the first diversion channel and the inlet of the first diversion channel.

8. The oil separation device according to claim 6, wherein: The oil separation device further comprises: A blocking member disposed between the outlet of the first diversion channel and the outlet of the second diversion channel.

9. The oil separation device according to claim 8, wherein: The blocking member is a blocking plate or a filter screen.

10. The oil separation device according to claim 8, wherein: The position and size of the blocking member are set such that, in the length direction of the housing, the blocking member can at least partially block the outlet of the first diversion channel and the outlet of the second diversion channel.

11. The oil separation device according to claim 5, wherein: The first diversion channel is formed by a first diversion partition plate and the housing, and the second diversion channel is formed by a second diversion partition plate and the housing.

12. The oil separation device according to claim 11, wherein: The middle part of the first diversion partition plate and / or the second diversion partition plate is bent to form an upper plate and a lower plate with a certain included angle.

13. The oil separation device according to claim 5, wherein: The first diversion channel is formed by a first diversion pipe, and the second diversion channel is formed by a second diversion pipe.

14. The oil separation device according to claim 4, wherein: The first diversion channel and the second diversion channel extend longitudinally side by side from the middle of the housing to the oil separation chamber of the housing, and both the first diversion channel and the second diversion channel are formed by diversion straight pipes; wherein, the first diversion channel is disposed close to the second diversion channel.

15. An oil separation device, characterized in that: The oil separation device comprises: A housing, which includes an oil separation chamber therein; A first refrigerant inlet and a second refrigerant inlet, which are disposed on the housing; A first diversion channel, which is disposed in the oil separation chamber, the first diversion channel has an inlet and an outlet, and the inlet of the first diversion channel is in fluid communication with the first refrigerant inlet to divert at least a part of the refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion channel to the outlet of the first diversion channel; and A second diversion channel is provided in the oil separation chamber. The second diversion channel has an inlet and an outlet. The inlet of the second diversion channel is in fluid communication with the second refrigerant inlet to divert at least a portion of the refrigerant gas entering the second refrigerant inlet from the inlet of the second diversion channel to the outlet of the second diversion channel; Wherein, the first diversion channel and the second diversion channel are configured such that the refrigerant gas flowing out of the outlet of the first diversion channel can be mixed with the refrigerant gas flowing out of the outlet of the second diversion channel; Wherein, the outlet of the first diversion channel and the outlet of the second diversion channel are close to each other; Wherein, the second diversion channel has an additional outlet, and the additional outlet is provided away from the outlet of the first diversion channel; The oil separation device further includes: A communication port for fluid communication with the condensing device. The communication port is located between the outlet of the second diversion channel and the additional outlet; A filter screen is transversely disposed in the oil separation chamber in the length direction of the housing. The filter screen is disposed between the outlet of the second diversion channel and the communication port; The oil separation device further includes an additional filter screen disposed between the additional outlet of the second diversion channel and the communication port.

16. The oil separation device according to claim 15, wherein: The first diversion channel longitudinally extends from one end in the length direction of the housing into the oil separation chamber of the housing, and the second diversion channel extends from the other end in the length direction of the housing toward the direction of the first diversion channel.

17. The oil separation device according to claim 16, wherein: The first diversion channel is formed by a diversion straight pipe, and the second diversion channel is formed by a diversion partition and the housing.

18. The oil separation device according to claim 15, wherein: The communication port is provided on the housing, and the at least one communication port is for fluid communication with the condensing device in the condenser.

19. A condenser, characterized in that: The condenser includes: A housing having a cavity therein; An oil separation partition is disposed in the housing and extends along the length direction of the housing. The oil separation partition divides the cavity into an oil separation chamber and a condensing chamber. The oil separation partition includes at least one communication port that communicates the oil separation chamber and the condensing chamber; A first refrigerant inlet and a second refrigerant inlet are provided on the housing; A first diversion channel is provided in the oil separation chamber. The first diversion channel has an inlet and an outlet. The inlet of the first diversion channel is in fluid communication with the first refrigerant inlet to divert at least a portion of the refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion channel to the outlet of the first diversion channel; and A second diversion channel is disposed in the oil separation chamber. The second diversion channel has an inlet and an outlet. The inlet of the second diversion channel is in fluid communication with the second refrigerant inlet to divert at least a portion of the refrigerant gas entering the second refrigerant inlet from the inlet of the second diversion channel to the outlet of the second diversion channel. Wherein, the outlet of the first diversion channel and the outlet of the second diversion channel are close to each other, and the first diversion channel and the second diversion channel are configured such that the refrigerant gas flowing out of the outlet of the first diversion channel can be mixed with the refrigerant gas flowing out of the outlet of the second diversion channel.

20. The condenser according to claim 19, characterized in that: The condenser further includes: At least one communication port for fluid communication with a condensing device; At least one filter screen disposed in the oil separation chamber perpendicular to the length direction of the housing; Wherein, the at least one filter screen is disposed between the at least one communication port and the outlet of the first diversion channel and the outlet of the second diversion channel that are close to each other, so that the mixed refrigerant gas can flow through the at least one filter screen to reach the at least one communication port.

21. The condenser according to claim 20, wherein: The at least one communication port includes two communication ports respectively disposed at opposite ends in the length direction of the housing; The at least one filter screen includes a first filter screen and a second filter screen; Wherein, the first filter screen is disposed between the outlet of the first diversion channel and one of the two communication ports; The second filter screen is disposed between the outlet of the second diversion channel and the other of the two communication ports.

22. The condenser according to claim 19, wherein: The first diversion channel and the second diversion channel extend from opposite ends in the length direction of the housing towards the middle of the housing along the length direction of the housing; Wherein, the outlet of the first diversion channel and the outlet of the second diversion channel are arranged to be spaced apart by a distance in the length direction of the housing, or offset by a distance in a direction perpendicular to the length direction of the housing.

23. The condenser according to claim 22, wherein: The outlet of the first diversion channel is disposed between the outlet of the second diversion channel and the inlet of the first diversion channel; and The outlet of the second diversion channel is disposed between the outlet of the first diversion channel and the inlet of the second diversion channel.

24. The condenser according to claim 22, wherein: The outlet of the first diversion channel is disposed between the outlet of the second diversion channel and the inlet of the second diversion channel; and The outlet of the second diversion channel is disposed between the outlet of the first diversion channel and the inlet of the first diversion channel.

25. The condenser according to claim 23, characterized in that: The condenser further includes: A blocking member, which is arranged between the outlet of the first diversion channel and the outlet of the second diversion channel.

26. The condenser according to claim 25, characterized in that: The blocking member is a baffle plate or a filter screen.

27. The condenser according to claim 25, characterized in that: The position and size of the blocking member are set such that, in the length direction of the housing, the blocking member can at least partially block the outlet of the first diversion channel and the outlet of the second diversion channel.

28. The condenser according to claim 22, characterized in that: The first diversion channel is formed by a first diversion partition and the housing, and the second diversion channel is formed by a second diversion partition and the housing.

29. The condenser according to claim 22, characterized in that: The first diversion channel is formed by a first diversion pipe, and the second diversion channel is formed by a second diversion pipe.

30. The condenser according to claim 20, characterized in that: The second diversion channel has an additional outlet, which is arranged away from the outlet of the first diversion channel; The at least one communication port includes a communication port, which is located between the outlet of the second diversion channel and the additional outlet; The at least one filter screen includes a filter screen, which is arranged between the outlet of the second diversion channel and the communication port; The condenser further includes an additional filter screen, which is arranged between the additional outlet of the second diversion channel and the communication port.

31. The condenser according to claim 30, characterized in that: The first diversion channel longitudinally extends from one end in the length direction of the housing towards the oil separation chamber in the housing, and the second diversion channel extends from the other end in the length direction of the housing towards the direction of the first diversion channel.

32. The condenser according to claim 31, characterized in that: The first diversion channel is formed by a straight diversion pipe, and the second diversion channel is formed by a diversion partition and the housing.

33. The condenser according to claim 21, characterized in that: The first diversion channel and the second diversion channel longitudinally extend side by side from the middle of the housing towards the oil separation chamber in the housing, and both the first diversion channel and the second diversion channel are formed by straight diversion pipes; wherein, the first diversion channel is arranged close to the second diversion channel.

34. A refrigeration system, characterized in that: The refrigeration system includes: A compressor unit; An oil separation device, wherein the oil separation device is the oil separation device according to any one of claims 1-18; A condenser; A throttling device; and An evaporator; wherein, the compressor unit, the oil separation device, the condenser, the throttling device and the evaporator are sequentially connected to form a refrigerant circulation loop; wherein, the compressor unit includes: a first compressor and a second compressor, and the first compressor and the second compressor are connected in parallel between the oil separation device and the evaporator; Wherein, the suction port of the first compressor and the suction port of the second compressor are connected to the evaporator; And wherein, the discharge port of the first compressor is connected to the first refrigerant inlet of the oil separation device, and the discharge port of the second compressor is connected to the second refrigerant inlet of the oil separation device.

35. The refrigeration system according to claim 34, wherein: The displacement of the first compressor is smaller than the displacement of the second compressor.

36. A refrigeration system, characterized in that: The refrigeration system includes: A compressor unit; A condenser, wherein the condenser is the condenser according to any one of claims 19-33; A throttling device; and An evaporator; Wherein, the compressor unit, the condenser, the throttling device and the evaporator are sequentially connected to form a refrigerant circulation loop; Wherein, the compressor unit includes: a first compressor and a second compressor, and the first compressor and the second compressor are connected in parallel between the condenser and the evaporator; Wherein, the suction port of the first compressor and the suction port of the second compressor are connected to the evaporator; And wherein, the discharge port of the first compressor is connected to the first refrigerant inlet of the condenser, and the discharge port of the second compressor is connected to the second refrigerant inlet of the condenser.

37. The refrigeration system according to claim 36, wherein: The displacement of the first compressor is smaller than the displacement of the second compressor.

Images