CN211345950U - Oil separator, condenser and refrigerating system - Google Patents

Abstract

The application discloses oil separator and condenser that has oil separating function to and use this oil separator and this condenser's refrigerating system, wherein oil separator or condenser include: a housing including an oil separation chamber therein; a first refrigerant inlet and a second refrigerant inlet; a first flow guide passage; and a second flow guide channel; wherein the first and second flow guide passages are configured to: so that the refrigerant gas flowing through the first guide passage and the refrigerant gas flowing through the second guide passage can be mixed. When the refrigerating system comprises two compressors with different discharge capacities, the oil separation device or the condenser can meet the requirement of fully filtering and separating the gaseous refrigerant and the lubricating oil without designing the size of an oil separation cavity according to the discharge capacity of the large-discharge compressor. This enables the oil separation chamber to be small in size, thereby enabling the oil separation device or the condenser to be small in overall size.

Description

Oil separator, condenser and refrigerating system

Technical Field

The present invention relates to an oil separating device, a condenser and a refrigeration system using the oil separating device or the condenser, and is particularly suitable for a refrigeration system comprising two compressors.

Background

In a conventional refrigeration system, a lubricant (e.g., 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 for being condensed into a liquid refrigerant. Specifically, the oil separation device or the condenser with the oil separation function comprises an oil separation chamber, and a filter screen is arranged in the oil separation chamber. In the oil separation cavity, the gas refrigerant and the lubricating oil pass through the filter screen to separate the lubricating oil from the gas refrigerant.

Generally, the size of the oil separation chamber affects the size of the oil separation device or the condenser having the oil separation function, and the size of the oil separation chamber is also related to the compressor displacement. The larger the displacement of the compressor is, the larger the flow rate of the mixture of the lubricating oil and the gaseous refrigerant which is discharged into the oil separation chamber per unit time is, and 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.

SUMMERY OF THE UTILITY MODEL

In a refrigeration system including a plurality of compressors, when the compressors are used in parallel in the same refrigeration system and share an oil separation device or a condenser having an oil separation function, air is generally introduced from both ends in the longitudinal direction (or axial direction) of the oil separation device or the condenser. When the displacement of each compressor is different, it is necessary to design the size (or radial cross-sectional area) of the oil separation chamber according to the compressor of which the displacement is the largest. However, for the compressor with smaller displacement in the refrigeration system, the oil separation chamber with large size is not needed, and the corresponding oil cross-sectional area is passively enlarged and over-designed, which causes waste.

In order to solve the above problems, at least one object of the present application in a first aspect is to provide an oil separating apparatus including: a housing including an oil separation chamber therein; a first refrigerant inlet and a second refrigerant inlet provided on the housing; a first diversion passage disposed in the oil separation chamber, the first diversion passage having an inlet and an outlet, the inlet of the first diversion passage being in fluid communication with the first refrigerant inlet to divert at least a portion of refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion passage to the outlet of the first diversion passage; and a second flow directing passage disposed in the oil separation chamber, the second flow directing passage having an inlet and an outlet, the inlet of the second flow directing passage being in fluid communication with the second refrigerant inlet to direct at least a portion of refrigerant gas entering the second refrigerant inlet from the inlet of the second flow directing passage to the outlet of the second flow directing passage; wherein the first and second flow guide passages are configured to: so that the refrigerant gas flowing out of the outlet of the first flow guiding passage and the refrigerant gas flowing out of the outlet of the second flow guiding passage can be mixed.

According to the first aspect described above, the outlet of the first flow guide passage and the outlet of the second flow guide passage are close to each other.

According to the first aspect described above, the oil separating device further includes: at least one communication port for fluid communication with a condensing device; the at least one filter screen is arranged in the oil separation cavity transversely to the length direction of the shell; wherein the at least one filter screen is disposed between the at least one communication port and the outlet of the first flow guide passage and the outlet of the second flow guide passage 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.

According to the first aspect, the at least one communication port includes two communication ports, and the two communication ports are respectively disposed at two opposite ends of the housing in the longitudinal direction; the at least one filter screen comprises a first filter screen and a second filter screen; the first filter screen is arranged between the outlet of the first flow guide channel and one of the two communication ports; the second filter screen is arranged between the outlet of the second flow guide channel and the other communication port of the two communication ports.

According to the first aspect described above, the first flow guide passage and the second flow guide passage extend from opposite ends of the housing in the longitudinal direction toward the middle of the housing along the longitudinal direction of the housing; wherein the outlet of the first flow guide channel and the outlet of the second flow guide channel are arranged to: the shell is spaced apart in the length direction of the shell or staggered by a distance in the length direction perpendicular to the shell.

According to the first aspect described above, the outlet of the first flow guide passage is provided between the outlet of the second flow guide passage and the inlet of the first flow guide passage; and the outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the second flow guide passage.

According to the first aspect described above, the outlet of the first flow guide passage is provided between the outlet of the second flow guide passage and the inlet of the second flow guide passage; and the outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the first flow guide passage.

According to the first aspect described above, the oil separating device further includes: a barrier disposed between the outlet of the first flow-directing channel and the outlet of the second flow-directing channel.

According to the first aspect, the blocking member is a blocking plate or a filter screen.

According to the first aspect described above, the position and size of the blocking member are set to: the blocking member may at least partially block the outlet of the first guide passage and the outlet of the second guide passage in a length direction of the housing.

According to the first aspect, the first guide passage is formed by a first guide partition plate and the housing, and the second guide passage is formed by a second guide partition plate and the housing.

According to the first aspect, the middle part of the first flow guide partition plate and/or the second flow guide partition plate is bent to form the upper plate and the lower plate with a certain included angle.

According to the first aspect described above, the first flow guide passage is formed by a first flow guide pipe, and the second flow guide passage is formed by a second flow guide pipe.

According to the first aspect described above, the second flow guide channel has an additional outlet which is located away from the outlet of the first flow guide channel; the at least one communication port comprises a communication port which is positioned between the outlet of the second diversion channel and the additional outlet; the at least one filter screen comprises a filter screen, and the filter screen is arranged between the outlet of the second flow guide channel and the communication port; the oil separation device further comprises an additional filter screen, and the additional filter screen is arranged between the additional outlet of the second flow guide channel and the communication port.

According to the first aspect described above, the first flow guide passage extends longitudinally from one end of the housing in the longitudinal direction toward the oil separation chamber of the housing, and the second flow guide passage extends from the other end of the housing in the longitudinal direction toward the first flow guide passage.

According to the first aspect, the first flow guide channel is formed by a flow guide straight pipe, and the second flow guide channel is formed by a flow guide partition plate and the shell.

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

According to the first aspect described above, the at least one communication port is provided on the housing for fluid communication with the condensing means in the condenser.

At least one object of the present application in a first aspect is to provide a condenser comprising: the shell is internally provided with a cavity; the oil separation baffle is arranged in the shell and extends along the length direction of the shell, the oil separation baffle divides the containing cavity into an oil separation cavity and a condensation cavity, and the oil separation baffle comprises at least one communication port which is communicated with the oil separation cavity and the condensation cavity; a first refrigerant inlet and a second refrigerant inlet provided on the housing; a first diversion passage disposed in the oil separation chamber, the first diversion passage having an inlet and an outlet, the inlet of the first diversion passage being in fluid communication with the first refrigerant inlet to divert at least a portion of refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion passage to the outlet of the first diversion passage; and a second flow directing passage disposed in the oil separation chamber, the second flow directing passage having an inlet and an outlet, the inlet of the second flow directing passage being in fluid communication with the second refrigerant inlet to direct at least a portion of refrigerant gas entering the second refrigerant inlet from the inlet of the second flow directing passage to the outlet of the second flow directing passage; wherein the first and second flow guide passages are configured to: so that the refrigerant gas flowing out of the outlet of the first flow guiding passage and the refrigerant gas flowing out of the outlet of the second flow guiding passage can be mixed.

According to the second aspect described above, the outlet of the first flow guide passage and the outlet of the second flow guide passage are close to each other.

According to the second aspect described above, the condenser further comprises: at least one communication port for fluid communication with a condensing device; the at least one filter screen is arranged in the oil separation cavity in a direction perpendicular to the length direction of the shell; wherein the at least one filter screen is disposed between the at least one communication port and the outlet of the first flow guide passage and the outlet of the second flow guide passage 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.

According to the second aspect described above, the at least one communication port includes two communication ports provided at opposite ends of the housing in the longitudinal direction, respectively; the at least one filter screen comprises a first filter screen and a second filter screen; the first filter screen is arranged between the outlet of the first flow guide channel and one of the two communication ports; the second filter screen is arranged between the outlet of the second flow guide channel and the other communication port of the two communication ports.

According to the second aspect described above, the first flow guide passage and the second flow guide passage extend from opposite ends of the housing in the longitudinal direction toward the middle of the housing along the longitudinal direction of the housing; wherein the outlet of the first flow guide channel and the outlet of the second flow guide channel are arranged to: the shell is spaced apart in the length direction of the shell or staggered by a distance in the length direction perpendicular to the shell.

According to the second aspect described above, the outlet of the first flow guide passage is provided between the outlet of the second flow guide passage and the inlet of the first flow guide passage; and the outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the second flow guide passage.

According to the second aspect described above, the outlet of the first flow guide passage is provided between the outlet of the second flow guide passage and the inlet of the second flow guide passage; and the outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the first flow guide passage.

According to the second aspect described above, the condenser further comprises: a barrier disposed between the outlet of the first flow-directing channel and the outlet of the second flow-directing channel.

According to the second aspect, the blocking member is a blocking plate or a filter screen.

According to the second aspect described above, the position and size of the blocking member are set to: the blocking member may at least partially block the outlet of the first guide passage and the outlet of the second guide passage in a length direction of the housing.

According to the second aspect, the first guide passage is formed by a first guide partition plate and the housing, and the second guide passage is formed by a second guide partition plate and the housing.

According to the above second aspect, the first flow guide passage is formed by a first flow guide pipe, and the second flow guide passage is formed by a second flow guide pipe.

According to the second aspect described above, the second flow guide channel has an additional outlet which is located away from the outlet of the first flow guide channel; the at least one communication port comprises a communication port which is positioned between the outlet of the second diversion channel and the additional outlet; the at least one filter screen comprises a filter screen, and the filter screen is arranged between the outlet of the second flow guide channel and the communication port; the condenser further comprises an additional filter screen, and the additional filter screen is arranged between the additional outlet of the second flow guide channel and the communication port.

According to the second aspect described above, the first flow guide passage extends longitudinally from one end of the housing in the longitudinal direction toward the oil separation chamber of the housing, and the second flow guide passage extends from the other end of the housing in the longitudinal direction toward the first flow guide passage.

According to the second aspect, the first flow guide channel is formed by a flow guide straight pipe, and the second flow guide channel is formed by a flow guide partition plate and the shell.

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

At least one object of the present application in a third aspect is to provide a refrigeration system comprising: a compressor unit; an oil separating device, wherein the oil separating device is the oil separating device according to the first aspect described above; a condenser; a throttling device; and an evaporator; 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 connected in parallel between the oil separating device and the evaporator; the air suction port of the first compressor and the air suction port of the second compressor are connected with the evaporator; and wherein the discharge port of the first compressor is connected to the first refrigerant inlet of the oil separating device, and the discharge port of the second compressor is connected to the second refrigerant inlet of the oil separating device.

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

At least one object of the present application in a fourth aspect is to provide a refrigeration system comprising: a compressor unit; a condenser, wherein the condenser is according to the second aspect above; a throttling device; and an evaporator; the compressor unit, the condenser, the throttling device and the evaporator are sequentially connected to form a refrigerant circulating loop; wherein, the compressor unit includes: a first compressor and a second compressor connected in parallel between the condenser and the evaporator; the air suction port of the first compressor and the air suction port of the second compressor are connected with the evaporator; and wherein a discharge port of the first compressor is connected to the first refrigerant inlet of the condenser and a discharge port of the second compressor is connected to the second refrigerant inlet of the condenser.

According to the fourth aspect described above, the displacement of the first compressor is smaller than the displacement of the second compressor.

Drawings

FIG. 1 is a block diagram of an embodiment of a refrigeration system of the present application;

FIG. 2 is a perspective view of the condenser of FIG. 1;

FIG. 3 is a radial cross-sectional view of the condenser of FIG. 2;

FIG. 4A is an axial cross-sectional view of the first embodiment of the condenser of FIG. 1;

FIG. 4B is a perspective view of the internal structure of the condenser of FIG. 4A from a front side perspective;

FIG. 4C is a perspective view of the internal structure of the condenser of FIG. 4A from a rear angle;

FIG. 4D is a radial cross-sectional view of the condenser of FIG. 4A;

FIG. 5 is an axial cross-sectional view of a second embodiment of the condenser of FIG. 1;

FIG. 6 is an axial cross-sectional view of a third embodiment of the condenser of FIG. 1;

FIG. 7 is an axial cross-sectional view of a fourth embodiment of the condenser of FIG. 1;

FIG. 8 is an axial cross-sectional view of a fifth embodiment of the condenser of FIG. 1;

FIG. 9 is an axial cross-sectional view of a sixth embodiment of the condenser of FIG. 1;

FIG. 10 is an axial cross-sectional view of a seventh embodiment of the condenser of FIG. 1;

FIG. 11 is an axial cross-sectional view of an eighth embodiment of the condenser of FIG. 1;

FIG. 12 is a block diagram of another embodiment of the refrigeration system of the present application;

FIG. 13 is a perspective view of an embodiment of the oil separation device of FIG. 12;

FIG. 14 is an axial cross-sectional view of the oil separation device of FIG. 13;

FIG. 15 is an axial cross-sectional view of the second embodiment of the oil separation device of FIG. 12;

FIG. 16 is an axial cross-sectional view of the third embodiment of the oil separation device of FIG. 12;

FIG. 17 is an axial cross-sectional view of the fourth embodiment of the oil separation device of FIG. 12;

FIG. 18 is an axial cross-sectional view of the fifth embodiment of the oil separation device of FIG. 12;

FIG. 19 is an axial cross-sectional view of the sixth embodiment of the oil separation device of FIG. 12;

FIG. 20 is an axial cross-sectional view of the seventh embodiment of the oil separation device of FIG. 12;

fig. 21 is an axial cross-sectional view of the eighth embodiment of the oil separating device in fig. 12.

Detailed Description

Various embodiments of the present application will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that although directional terms, such as "front," "rear," "upper," "lower," "left," "right," "top," "bottom," and the like may be used herein to describe various example structural portions and elements of the application, these terms are used herein for convenience of description only and are to be determined based on the example orientations shown in the figures. Because the embodiments disclosed herein can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and are not to be construed as limiting. Wherever possible, the same or similar reference numbers used in this application refer to the same or like parts.

Fig. 1 is a block diagram of an embodiment of a refrigeration system 100 of the present application, illustrating the connections of components in a refrigeration system including two compressors in parallel. In the embodiment of the present application, the condenser 130 has an oil separating function, and a specific structure that specifically realizes the function will be described in detail below.

As shown in fig. 1, the refrigeration system 100 includes a compressor unit, a condenser 130, a throttling device 140, and an evaporator 110, which are sequentially connected by pipes to form a refrigerant circulation circuit. Wherein the compressor string comprises a first compressor 108 and a second compressor 109. Wherein the displacement (i.e., refrigerant gas flow) of the first compressor 108 is less than the displacement 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.

Specifically, the first compressor 108 is provided with an intake port 141, an exhaust port 151, and an oil return port 161. The second compressor 109 is provided with an intake port 142, an exhaust 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. A suction port 141 of the first compressor 108 and a suction port 142 of the second compressor 109 are connected to an 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 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 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 a throttling device 140.

The refrigeration system 100 is flooded with a refrigerant and a lubricating substance (e.g., lubricating oil). The operation of the refrigeration system 100 is briefly described as follows:

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 and second refrigerant inlets 121 and 122 of the condenser 130, respectively. In the condenser 130, the high-temperature and high-pressure gaseous refrigerant first passes through the oil separation chamber 315 (not shown in fig. 1 and 2, see fig. 3), and then is exothermically condensed into a high-pressure liquid refrigerant (possibly containing a portion of the gaseous refrigerant) in the condensation chamber 316 (not shown in fig. 1 and 2, see fig. 3) in the condenser 130. The high pressure liquid refrigerant is discharged from the refrigerant outlet 124 of the condenser 130 and then throttled to a low pressure liquid refrigerant by the throttle device 140. Subsequently, the low-pressure liquid refrigerant is evaporated to a low-temperature low-pressure gaseous refrigerant by absorbing heat in the evaporator 110, and then returned to the first compressor 108 and the second compressor 109. And the operation is repeated in this way, and the continuous refrigeration cycle is completed.

In the first and second compressors 108 and 109, the lubricating oil is used to lubricate the first and second compressors 108 and 109, and then the lubricating oil is discharged out of the first and second compressors 108 and 109 together with the gaseous refrigerant. The discharged high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter "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 condensing chamber 316 in the condenser 130 as described above, and the separated lube oil flows back to the first compressor 108 and the second compressor 109 through the oil outlet 123 of the condenser 130.

For convenience 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 will appreciate that the condenser 130 may be not only a shell and tube condenser, but the condenser 130 may be other different forms of condensers in accordance with the spirit of the present application. For example, the condenser 130 may be a shell-and-tube condenser or a double-tube condenser.

Fig. 2 is a perspective view of one embodiment of the condenser 130 of fig. 1, illustrating an external structure of the condenser 130. As shown in fig. 2, the condenser 130 includes a casing 201, and the casing 201 is substantially cylindrical, and both left and right ends in the longitudinal direction thereof are closed by end plates 202 and 204. The casing 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 at an upper portion of the case 201 and are disposed near left and right ends of the case 201, respectively. The oil outlet 123 and the refrigerant outlet 124 are located at a middle position of the lower portion of the case 201. The condenser 130 further includes a water supply pipe 206 and a water return pipe 207. A water supply pipe 206 and a water return pipe 207 are provided on the end plate 202 and can be in fluid communication with a condensing device 313 (see fig. 3 in detail) inside the condenser 130, thereby allowing a cooling medium (e.g., water) to flow into and out of the condenser 130.

The condenser 130 further includes a conduit 181, a conduit 182, a conduit 183, and a conduit 184. Wherein the pipe 181 communicates with the first refrigerant inlet 121 such that the first refrigerant inlet 121 is connected with the discharge port 151 of the first compressor 108. Conduit 182 communicates with second refrigerant inlet 122 such that second refrigerant inlet 122 is connected to discharge port 152 of second compressor 109. Since the displacement of the first compressor 108 is smaller than the displacement of the second compressor 109, the size of the first refrigerant inlet 121 is smaller than the size of the second refrigerant inlet 122. Accordingly, the pipe diameter of the pipe 181 is smaller than that of the pipe 182. The conduit 183 communicates with the oil outlet 123 so that the oil outlet 123 is connected to the oil return port 161 and the oil return port 162. The conduit 184 communicates with the refrigerant outlet 124 to facilitate connection of the refrigerant outlet 124 to the throttling device 140.

It should be noted that the first refrigerant inlet 121, the second refrigerant inlet 122, the oil outlet 123 and the refrigerant outlet 124 of the condenser may be arranged at different positions according to the specific arrangement of the condenser, for example, in the embodiment shown in fig. 11, the first refrigerant inlet 121 and the second refrigerant inlet 122 are arranged at the middle of the housing 201.

Fig. 3 is a sectional view of the condenser 130 of fig. 2 taken along line a-a of fig. 2, for illustrating the general structure of the interior of the condenser 130, in which the end plate 202 is omitted. As shown in fig. 3, the housing 201 of the condenser 130 has a cavity 311 therein. The condenser 130 includes an oil separation partition 337. The oil separation partition 337 is obliquely disposed inside the casing 201 and extends in a length direction of the casing 201 to be connected with an inner wall of the casing 201. The oil separation partition 337 separates the receiving chamber 311 into an oil separation chamber 315 and a condensation chamber 316. Wherein components (not shown) housed in the oil separation chamber 315 enable separation of the lubricating oil from the gaseous refrigerant. The condensing device 313 accommodated in the condensing chamber 316 enables the gaseous refrigerant to be condensed into the liquid refrigerant. The upper portion of the oil separation partition 337 is provided with at least one communication port 341, and the at least one communication port 341 is used to communicate the oil separation chamber 315 with the condensation chamber 316, so that the gaseous refrigerant separated from the lubricating oil flows from the oil separation chamber 315 into the condensation chamber 316.

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

Fig. 4A-4D show a first embodiment of the condenser of the present application. Wherein fig. 4A is a sectional view taken along line C-C of fig. 2 of the first embodiment of the condenser according to the present application to show the components in the oil separation chamber 315, in which the water supply pipe 206 and the water return pipe 207 are omitted; fig. 4B is a perspective view of the components in the oil separation partition 337, the pipe 181, the pipe 182, and the oil separation chamber 315 in the condenser 430 shown in fig. 4A, viewed from the front side; FIG. 4C is a perspective view of the components shown in FIG. 4B from the rear side; fig. 4D is a cross-sectional view of the condenser 430 shown in fig. 4A taken along line B-B of fig. 2, in which the end plate 202 is omitted.

As shown in fig. 4A-4D, the condenser 430 includes a left sealing plate 471 and a right sealing plate 472. The left and right sealing plates 471 and 472 are symmetrically disposed at left and right ends of the oil separation chamber 315, and are sealingly coupled to the oil separation partition 337 and the housing 201.

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

As a more specific example, as shown in fig. 4D, in a radial section of the housing 201, the middle portion of the first baffle 431 is bent toward the inside of the housing 201 to form an upper plate 426 and a lower plate 427 connected to each other, which form an angle therebetween. Under the condition that the connection position of the first flow guide partition plate 431 and the shell 201 is fixed, the radial sectional area of the first flow guide channel 445 can be increased by arranging the first flow guide partition plate 431 in a shape that the middle part is bent towards the condensation cavity 316.

Similarly, the condenser 430 also includes a second baffle 432. The right end of the second baffle plate 432 is connected to the right cover plate 472, and the second baffle plate 432 extends from the right cover plate 472 toward the middle of the case 201 in the length direction (i.e., left-right direction) of the condenser 430. The second baffle 432 is obliquely disposed at an upper portion of the oil separation chamber 315 and is connected to an inner wall of the housing 201. In the radial section of the shell 201, the middle of the second baffle 432 is also bent toward the condensing chamber 316, and as a more specific example, the second baffle 432 has the same shape as the first baffle 431. A second guide passage 446 is formed between the second baffle 432, the right sealing plate 472 and the casing 201. The second baffle 432 forms a second flow passage 446 with the housing 201 that is substantially arcuate in radial cross-section. The second guide passage 446 has an inlet 446a and an outlet 446 b. The inlet 446a is located at the right end of the second guide passage 446 and is in fluid communication with the second refrigerant inlet 122. The outlet 446b is located at the left end of the second guide passage 446. In the oil separation chamber 315, a receiving chamber located below the second guide passage 446 is designed to be large enough to sufficiently separate the lubricating oil from the gaseous refrigerant.

As shown in fig. 4A-4C, condenser 430 also includes a baffle 434. The blocking member 434 is disposed between the outlet 445b of the first guide passage 445 and the outlet 446b of the second guide passage 446 for separating the outlet 445b and the outlet 446 b. Specifically, the blocking member 434 is a blocking plate and has a substantially fan shape, and the arc shape of the top portion thereof matches the arc shape of the housing 201, so that the blocking member 434 can be coupled 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 the outlet 445b and the outlet 446b can be at least partially blocked in the length direction of the housing 201. This arrangement prevents the outlet 445b and the outlet 446b from being directly opposed to each other, thereby preventing the mixture flowing out of one of the guide passages from flowing into the other guide passage due to its high velocity.

After the mixture flows into the condenser 430 through the first guide passage 445 and the second guide passage 446, respectively, the mixture flowing from the first guide passage 445 does not immediately contact the mixture flowing from the second guide passage 446, but changes the flow direction after being blocked by the blocking member 434, and is mixed substantially at the mixing region 450 (shown in dotted hatching in fig. 4A).

It is noted that the outlet 445b of the first guide passage 445, the outlet 446b of the second guide passage 446 and the baffle 434 are collectively arranged to enable the mixture flowing out of the outlet 445b and the outlet 446b to mix substantially in the vicinity of the mixing region 450.

The mixing region 450 mentioned above schematically represents only a rough gas mixing portion and does not represent a physical division, and the position and size of the mixing region 450 may be different in different embodiments, but the mixing region 450, the outlet 445b of the first guide passage 445 and the outlet 446b of the second guide passage 446 should be close to each other according to the nature of the mixture that is diffused immediately after flowing out from the outlets.

It will be understood by those skilled in the art that the outlets of the first and second guide passages may not be arranged to be diametrically opposed, but may be arranged to be rotated to be offset by a certain angle, or spaced apart in the front-rear and up-down directions, only by ensuring that the outlets are close to each other so that the refrigerants flowing from the outlets can be mixed. In some embodiments, the stop 434 may be of any shape, as the outlets of the first and second flow channels are not directly opposite, as shown in the embodiments of fig. 8-11.

As shown in fig. 4B to 4C, the at least one communication port 341 includes a left communication port 441 and a right communication port 442 which are respectively provided at upper portions of both left and right ends of the oil separating partition 337 to communicate the oil separating chamber 315 and the condensing chamber 316 at both sides of the oil separating 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.

The condenser 430 also includes a first filter 475 and a second filter 476 disposed in the oil separation chamber 315. Specifically, the first filter 475 is disposed between the left communication port 441 and the outlet 445b, and is disposed adjacent to the left communication port 441. The second filter 476 is provided 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 each extend in the radial direction of the condenser 430 in the oil separation chamber 315 (i.e., the filter screens need to be connected to the baffle, the oil separation baffle, 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 the lubricating oil in the mixture cannot be discharged from the left communication port 441 or the right communication port 442 to the condensation chamber 316.

The operation of the various components in the oil separation chamber 315 will be described in detail below in conjunction with FIG. 4A. The arrows in fig. 4A indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

Specifically, a high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as "first mixture") discharged from the first compressor 108 enters the oil separation chamber 315 through the first refrigerant inlet 121. The first mixture flows along the first guide passage 445 defined by the first guide partition 431 in a substantially horizontal direction to the outlet 445 b. The high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as "second mixture") discharged from the second compressor 109 enters the oil separation chamber 315 through the second refrigerant inlet 122. The second mixture flows along the second flow guide passage 446 defined by the second flow guide partition 432, substantially in a horizontal direction, to the outlet 446 b. The first mixture and the second mixture change flow direction to flow downward after impacting the barrier 434 from the left and right sides, respectively. Since there is no longer the obstruction of the barriers 434, the first and second mixtures intermix while flowing downward, generally at the mixing zone 450.

In the condenser 430, on the one hand, the pressure in the condensation chamber 316 is smaller than the pressure in the oil separation chamber 315, and therefore the mixture in the oil separation chamber 315 flows toward the condensation chamber 316. On the other hand, since both the left and right communication ports 441, 442 communicate with the condensation chamber 316, the pressures at the left and right communication ports 441, 442 are substantially the same, and the sizes of the left and right communication ports 441, 442 are also substantially the same. Therefore, when the first mixture and the second mixture are mixed with each other substantially at the mixing area 450, the first mixture and the second mixture are divided into two mixtures having substantially the same flow rate under pressure and flow toward the left communication port 441 and the right communication port 442, respectively.

Since the components in the condenser 430 are arranged in a substantially left-right symmetrical manner, the flow directions of the two mixtures are also similar. For the sake of brevity, the flow of a mixture is illustrated herein by taking the example of mixing a stream of the mixture flowing to the left. Specifically, the mixture flows toward the left and through the first filter 475. The first filter 475 has fine pores, and the lubricant in the mixture adheres to the first filter 475, thereby separating the lubricant from the gaseous refrigerant. On the one hand, since the pressure in the condensation chamber 316 is smaller than the pressure in the oil separation chamber 315, the gaseous refrigerant continues to flow toward the left communication port 441. On the other hand, the lubricating oil adhered to the first filter screen 475 is deposited on the bottom of the oil separation chamber 315 by gravity, and is discharged out of the oil separation chamber 315 via the oil outlet 123 located at the bottom of the oil separation chamber 315.

It should be noted that, in order to prevent the mixture from directly impacting the first baffle 431 and the second baffle 432 due to an excessive flow velocity when the mixture enters the oil separation chamber 315, a flushing prevention member 438 and a flushing prevention member 439 may be respectively provided on the first baffle 431 and the second baffle 432. Specifically, the impingement member 438 and the impingement member 439 may be disposed at corresponding positions of the first and second baffles 431 and 432 opposite the first and second refrigerant inlets 121 and 122, respectively. As one example, the impingement member may be a filter screen.

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 high and causing disturbance to the level of the lubricating oil deposited in the oil separation chamber 315, a baffle (not shown) may be further provided in the oil separation chamber 315. The baffle is connected to 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 the filter screens to be deposited on the bottom of the oil separation chamber 315 without the flow of the mixture impacting the liquid level of the lubricating oil.

In the conventional condenser with an oil separating function, since the displacement of the first compressor 108 is smaller than that of the second compressor 109, the oil separating chamber in the conventional condenser is sized according to the displacement of the large-displacement compressor (i.e., the second compressor 109). The size of the oil separation chamber is too large for a small displacement compressor (i.e., the first compressor 108) to be wasteful.

In the present application, when the displacement of the first compressor 108 is smaller than the displacement of the second compressor 109, the condenser 430 enables the mixture of the gaseous refrigerant and the lubricating oil discharged from the first compressor 108 and the second compressor 109 to be mixed in the oil separation chamber 315, and then to be divided into two uniform streams for filtering. The condenser 430 thus does not need to size the oil separation chamber 315 according to the displacement of the large displacement compressor (i.e., the second compressor 109) to meet the requirement of sufficient filtering separation of the gaseous refrigerant and the lubricating oil. This enables the oil separation chamber 315 to be small in size, thereby enabling the condenser 430 to be small in overall size.

As one example, the oil separation chamber 315 may be sized according to the average displacement design of the large displacement compressor (i.e., the second compressor 109) and the small displacement compressor (i.e., the first compressor 108).

Fig. 5 is a cross-sectional view of a second embodiment of a condenser according to the present application taken along line C-C of fig. 2 to illustrate various components within the oil separation chamber 315. The arrows in fig. 5 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

Specifically, the structure of the condenser 530 is substantially the same as that of the condenser 430 shown in fig. 4A to 4C, and the condenser 530 is different from the condenser 430 in that: in the embodiment shown in fig. 5, the barrier is a filter screen 534 rather than a barrier plate. The filter screen 534 has fine pores, but it can prevent the second mixture discharged from the second compressor 109 from channeling into the second guide passage 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 are evenly divided into two parts, and the lubricating oil is separated by the first filter screen 475 and the second filter screen 476 respectively and flows 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.

Fig. 6 is a cross-sectional view of a third embodiment of the condenser of the present application taken along line C-C of fig. 2 to illustrate the components in the oil separation chamber 315. The arrows in fig. 6 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

Specifically, the structure of the condenser 630 is substantially the same as that of the condenser 430 shown in fig. 4A-4C, and the condenser 630 is different from the condenser 430 in that: the specific structure of the first baffle plate 631 and the second baffle plate 632 at the inlet is different. As shown in fig. 6, in the condenser 630, a first baffle 631 adjacent to the first refrigerant inlet 121 and a second baffle 632 adjacent to the second refrigerant inlet 122 are designed in a box shape with an open top. The first baffle 645 is formed by the first baffle 631 and the case 201, and the second baffle 646 is formed by the second baffle 632 and the case 201. Thus, the guide passages may be formed only by the guide partition and the case without the left and right sealing plates to define the first and second guide passages 645 and 646, respectively, so that the assembling process of the condenser 630 may be simplified.

Specifically, the left end of the first baffle 631 has a box shape with an open top. The right side of the box body extends toward the middle of the case 201 in the length direction of the case 201 to form a first guide passage 645. The right end of the second baffle 632 is in the shape of a box with an open top. The left side of the box body extends toward the middle of the housing 201 along the length direction of the housing 201 to form a second guide passage 646.

The left end of the first baffle 631 and the right end of the second baffle 632 are designed to be in the shape of a box with an open top, so that the radial area of the flow guide channel near the first refrigerant inlet 121 and the second refrigerant inlet 122 can be increased, and the velocity of the mixture after entering the condenser 630 can be reduced, thereby reducing the impact of the mixture on the baffle. Thus, in this embodiment, the impact prevention member may not be provided.

Fig. 7 is a cross-sectional view of a fourth embodiment of the condenser of the present application taken along line C-C of fig. 2 to illustrate the components in the oil separation chamber 315. The arrows in fig. 7 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

Specifically, the structure of the condenser 730 is substantially the same as the structure of the condenser 430 shown in fig. 4A-4C, and the condenser 730 differs from the condenser 430 in that: in the embodiment shown in fig. 7, the first and second flow guide passages 745 and 746, respectively, are formed of tubes. As shown in fig. 7, the first deflector channel 745 is formed by a first deflector tube 735 and the second deflector channel 746 is formed by a second deflector tube 736. As one example, the first flow guide tube 735 extends upwardly through the first refrigerant inlet 121 disposed on the shell 201 to connect with the discharge port 151 of the first compressor 108. A second delivery tube 736 extends upwardly through a second refrigerant inlet 122 disposed on the shell 201 to connect with the discharge port 152 of the second compressor 109.

In this embodiment, the flow guide channel is directly formed through the flow guide tube to limit the flow path of the mixture after entering the flow guide channel, and the left sealing plate 471 and/or the right sealing plate 472 as shown in fig. 4A to 4C are not required to be additionally provided.

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

Fig. 8 is a cross-sectional view of a fifth embodiment of the condenser of the present application taken along line C-C of fig. 2 to illustrate the components in the oil separation chamber 315. The arrows in fig. 8 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315. As shown in fig. 8, the first guide passage 845 and the second guide passage 846 in the condenser 830 are formed of pipes, respectively.

Specifically, the first guide channel 845 is formed of a guide straight tube 864, which extends upward through the first refrigerant inlet 121 disposed on the casing 201 to be connected with the discharge port 151 of the first compressor 108. An outlet 845b of the first guide passage 845 is disposed at a lower end of the first guide passage 845.

The second deflector channel 846 is formed by the deflector baffle 863 and the housing 201. The baffle 863 is spaced apart from the top of the case 201 and extends horizontally along the length of the case 201. The second flow guide passage 846 is in fluid communication with the second refrigerant inlet 122. Wherein the second flow guide channel 846 has an outlet 846b provided at a left end thereof and an additional outlet 843 provided at a right end thereof. The outlet 846b is disposed adjacent to the outlet 845b of the first guide passage 845. The additional outlet 843 is disposed away from the outlet 845b of the first guide passage 845. After the mixture flows into the second flow guide passage 846 from the second refrigerant inlet 122, a portion of the mixture flows out through the additional outlet 843, and another portion of the mixture flows from the right to the left and flows out of the outlet 846 b. The mixture flowing out of the outlet 845b of the first guide passage 845 is mixed with the mixture flowing out of the outlet 846b in the vicinity of the mixing region 850.

In the embodiment shown in fig. 8, the condenser 830 includes only one communication port 841 provided at the middle of the oil separation partition 337. The condenser 830 also includes a first filter 875 and an additional filter 877. The first filter 875 is disposed between the outlet 846b of the second flow guide passage 846 and the communication opening 841, and the additional filter 877 is disposed between the additional outlet 843 of the second flow guide passage 846 and the communication opening 841.

The mixture mixed at the mixing area 850 flows through the first screen 875 from left to right. Upon passing through the first filter mesh 875, the gaseous refrigerant is separated from the lubricating oil. The gaseous refrigerant separated from the lubricating oil enters the condensation chamber through the communication port 841. The lubricating oil is deposited on the bottom of the oil separation chamber 315 due to gravity. And the mixture flowing out of the additional outlet 843 flows through the additional filter screen 877 from right to left after striking the right end plate 204 on the right side of the housing 201. The gaseous refrigerant is separated from the lubricating oil while passing through the additional filter screen 877. The gaseous refrigerant separated from the lubricating oil enters the condensation chamber through the communication port 841. The lubricating oil is deposited on the bottom of the oil separation chamber 315 due to gravity.

In this embodiment, the mixture discharged from the large displacement compressor (i.e., the second compressor 109) is divided into two portions, one of which directly flows through the additional filter 877, and the other of which is mixed with the gaseous refrigerant discharged from the small displacement compressor (i.e., the first compressor 108) and then flows through the first filter 875. By sizing the additional outlet 843, the flow rate of the mixture through the additional filter 877 and the first filter 875 can be made substantially equal, and thus the flow rate of the mixture can be automatically distributed into two uniform streams for filtration. This also enables the oil separation chamber 315 to be small in size, thereby enabling the condenser 430 to be small in overall size.

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 arranged right opposite to each other, the mixture flowing out of one diversion channel can be prevented from flowing into the other diversion channel due to a high speed without providing a blocking member.

FIG. 9 is a cross-sectional view of a sixth embodiment of the condenser of the present application taken along line C-C of FIG. 2 to illustrate the components within the oil separation chamber 315. The arrows in fig. 9 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

Specifically, the structure of the condenser 930 is substantially the same as that of the condenser 730 shown in fig. 7, and the condenser 930 is different from the condenser 730 in that: the first delivery tube 735 and the second delivery tube 736 are specifically arranged in the height direction. As shown in fig. 9, the outlet 945b of the first flow guide channel 945 of the condenser 930 is disposed opposite to the outlet 946b of the second flow guide channel 946 and is staggered by a distance in the height direction such that the outlet 946b is below the outlet 945b in the height direction. Therefore, in this embodiment, the mixture flowing out of one of the guide channels can be prevented from flowing into the other guide channel due to the high speed without providing the blocking member.

It will be appreciated by those skilled in the art that in other embodiments, the outlet 945b of the first flow guide channel 945 and the outlet 946b of the second flow guide channel 946 are offset from each other in a direction perpendicular to the length of the housing to prevent the mixture flowing out of one flow guide channel from entering the other flow guide channel due to the higher velocity.

FIG. 10 is a cross-sectional view of a seventh embodiment of the condenser of the present application taken along line C-C in FIG. 2 to illustrate the components in the oil separation chamber 315. The arrows in fig. 10 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

Specifically, the structure of the condenser 1030 is substantially the same as that of the condenser 930 shown in fig. 9, and the condenser 1030 is different from the condenser 930 in that: the outlet 1045b of the first guide passage 1045 and the outlet 1046b of the second guide passage 1046 are disposed at different positions. As shown in fig. 10, the first guide passage 1045 and the second guide passage 1046 of the condenser 1030 each extend from both ends of the housing 201 to the middle to cross each other, i.e., the outlet 1045b of the first guide passage 1045 is located at the right side of the outlet 1046b of the second guide passage 1046. In other words, the outlet 1045b of the first flow guide passage 1045 is between the outlet 1046b of the second flow guide passage 1046 and the inlet 1046a of the second flow guide passage 1046, and the outlet 1046b of the second flow guide passage 1046 is between the outlet 1045b of the first flow guide passage 1045 and the inlet 1045a of the first flow guide passage 1045. At this time, the mixture flowing out of one of the guide channels can be prevented from flowing into the other guide channel due to high speed without arranging a blocking piece.

Fig. 11 is a cross-sectional view of an eighth embodiment of the condenser of the present application taken along line C-C in fig. 2 to illustrate the components in the oil separation chamber 315. The arrows in fig. 11 indicate the flow path of the gaseous refrigerant and lubricating oil mixture in the oil separation chamber 315.

As shown in fig. 11, the first and second diversion passages 1145 and 1146 of the condenser 1130 are vertical passages formed by the diversion straight pipes 1164 and 1169, respectively. The guide straight tube 1164 and the guide straight tube 1169 are arranged in parallel in the middle of the shell 201. The guide straight pipe 1164 extends upward through the first refrigerant inlet 121 disposed on the shell 201 to be connected with the discharge port 151 of the first compressor 108. The guide straight pipe 1169 extends upward through the second refrigerant inlet 122 disposed on the shell 201 to be connected with the discharge port 152 of the second compressor 109. An outlet 1145b of the first flow guide channel 1145 is disposed at a lower end of the first flow guide channel 1145. An outlet 1146b of the second flow guide channel 1146 is disposed at a lower end of the second flow guide channel 1146. As one example, the outlets of the first and second flow guide channels 1145, 1146 are disposed back to back. Thus, after the mixture flows into the first flow guiding channel 1145 and the second flow guiding channel 1146 from the first refrigerant inlet 1121 and the second refrigerant inlet 1122, respectively, the mixture can flow downward into the oil separation chamber 315 and reach the mixing region 1150 below the respective outlets for mixing.

Similar to the embodiment shown in fig. 4A to 4C, the condenser 1130 further includes a first filter net 1175, a second filter net 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 provided at both left and right ends of the oil separation partition 337. The mixed mixture is equally divided into two portions, one of which flows through a first filter screen 1175 to separate the lube oil. The gaseous refrigerant separated from the lubricating oil then flows into the condensation chamber from the left communication port 441. Another portion passes through a second filter screen 1176 to separate the lube oil. The gaseous refrigerant separated from the lubricating oil then flows into the condensation chamber from the right communication port 442.

Since the outlets of the first and second flow guide channels 1145, 1146 are back-to-back (not directly opposite), no blocking member is required.

Although the diversion channels with different structures are designed in the above embodiments, the flow path of the mixture can be controlled, so that at least one part of the mixture from the large-displacement compressor can be mixed and uniformly distributed with the mixture from the small-displacement compressor before filtration, and 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 that the lubricating oil is sufficiently filtered and separated can be met. The condenser of the application can reduce the size requirement of the oil separation chamber, and then reduce the size requirement of the condenser.

Fig. 12 is a block diagram of another embodiment of the refrigeration system of the present application, illustrating the connection of the various components in the refrigeration system including a separate oil separation device, in which the condenser does not have an oil separation function. As shown in fig. 12, the refrigeration system 1200 includes a compressor unit, a condenser 1230, a throttling device 140, and an evaporator 110, which are connected in sequence by pipes to form a refrigerant circulation circuit, wherein an oil separating device 1283 is further provided between the compressor unit and the condenser 1230. The compressor train includes a first compressor 1208 and a second compressor 1209, in this embodiment the first compressor 1208 has a displacement (i.e., refrigerant gas flow) less than the displacement of the second compressor 1209, and the first compressor 1208 and the second compressor 1209 are connected in parallel between the oil separator 1283 and the evaporator 110.

Specifically, the first compressor 1208 is provided with an intake port 1291, an exhaust port 1251, and an oil return port 1261. The second compressor 1209 is provided with an intake port 1242, an exhaust port 1252, and an oil return port 1262. The oil separator 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., an oil separator refrigerant gas outlet). As one example, the at least one communication port includes two communication ports (i.e., oil separator refrigerant gas outlets) 1241 and 1242. A suction port 1291 of the first compressor 1208 and a suction port 1242 of the second compressor 1209 are connected to an 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 1261 of the first compressor 1208 is connected to the oil outlet 1223 of the oil separator 1283. The discharge port 1252 of the second compressor 1209 is connected to the second refrigerant inlet 1222 of the oil separating device 1283. The oil return 1262 of the second compressor 1209 is also connected to the oil outlet 1223 of the oil separator 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 throttle device 140.

The refrigeration system 100 is flooded with a refrigerant and a lubricating substance (e.g., lubricating oil). The operation of the refrigeration system 1200 is briefly described as follows:

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 passes through the first refrigerant inlet 1221 and the second refrigerant inlet 1222 of the oil separating device 1283, passes through the oil separating device 1283, and then flows into the condenser 1230 to release heat, so that the high-pressure gaseous refrigerant (possibly including a part of the gaseous refrigerant) is condensed. The high-pressure liquid refrigerant is discharged from the refrigerant outlet 124 of the condenser 1230, and then flows through the throttle device 140 to be throttled into a low-pressure liquid refrigerant. The low pressure liquid refrigerant then absorbs heat in the evaporator 110 and is evaporated to a low pressure gaseous refrigerant before returning to the first compressor 1208 and the second compressor 1209. And the operation is repeated in this way, and the continuous refrigeration cycle is completed.

In the first compressor 1208 and the second compressor 1209, the lubricating oil is used to lubricate the first compressor 1208 and the second compressor 1209, and then the lubricating oil is discharged out of 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 separating device 1283. In the oil separation chamber 1315 (not shown, see fig. 13) of the oil separator 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 of the oil separating device 1283.

Fig. 13 is a perspective view of an embodiment of an oil separator 1283 shown in fig. 12. As shown in fig. 13, the oil separator 1283 includes a housing 1301, and the housing 1301 includes an oil separation chamber 1315 therein. 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 an upper portion of the casing 1301 and are respectively disposed near both left and right ends of the casing 1301, the oil outlet 1223 is disposed at a lower portion of the casing 1301, and the communication ports 1241 and 1242 are respectively disposed at both left and right ends of the casing 1301.

The oil separator 1283 further includes a pipe 1281, a pipe 1282, a pipe 1284, a pipe 1285, and a pipe 1286. Wherein the pipe 1281 communicates with the first refrigerant inlet 1221 such that the first refrigerant inlet 1221 is connected to the discharge port 1251 of the first compressor 1208. A conduit 1282 communicates with the second refrigerant inlet 1222 such that the second refrigerant inlet 1222 is connected to the discharge port 1252 of the second compressor 109. Conduit 1284 is in communication with oil outlet 1223 such that oil outlet 1223 is connected to oil return 1261 and oil return 1262. The pipe 1285 and the pipe 1286 communicate with the communication ports 1241 and 1242, respectively, so that the communication ports 1241 and 1242 are connected to the condenser 1230.

It should be noted that the first refrigerant inlet 1221, the second refrigerant inlet 1222, the oil outlet 1223, and the communication ports 1241, 1242 of the oil separating means may be arranged at different positions according to the specific arrangement of different oil separating means, for example, in the embodiment shown in fig. 21, the first refrigerant inlet 1221 and the second refrigerant inlet 1222 are arranged at the middle of the housing 201. And at least one communication port may not include two communication ports, such as in the embodiment shown in fig. 18, which includes only one communication port.

A first baffle 1331, a second baffle 1332, a baffle 434, a first filter 1375 and a second filter 1376 are also provided inside the oil separation chamber 1315 of the oil separator 1283. The first diversion partition 1331 and the housing 1301 form a first diversion passage 1345, and the second diversion passage 1332 and the housing 1301 form a second diversion passage 1346.

Fig. 14 is a cross-sectional view of the first embodiment of the oil separation device 1283 of fig. 13 taken along line D-D of fig. 13 to illustrate specific structure within the oil separation chamber 1315. As shown in fig. 14, the specific structure inside the oil separation chamber 1315 is substantially the same as that inside the oil separation chamber 315 of the condenser 430 in fig. 4A-4C, except that the oil separation device 1283 does not include an oil separation partition, and a communication port, which is originally provided on the oil separation partition, is provided directly on the housing 1301, for fluid communication with the condensing device in the condenser 1230, so that the gaseous refrigerant flowing out of the communication port can be condensed by passing through the condensing device.

Specifically, the high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as "first mixture") discharged from the first compressor 1208 enters the oil separation chamber 1315 and flows along the first flow guide passage 1345 to the outlet 1345b in a substantially horizontal direction. The high-pressure gaseous refrigerant and lubricating oil mixture (hereinafter referred to as "second mixture") discharged from the second compressor 1209 enters the oil separation chamber 1315 and flows along the second flow guide passage 1346 to the outlet 1346b in a substantially horizontal direction. The first mixture and the second mixture change their flow directions from the left and right impact barriers 1334 to the downward direction, are mixed at the mixing region 1450, are evenly divided into two parts, are filtered and separated by the first filter 1375 and the second filter 1376, respectively, and flow into the condenser through the communication ports 1241 and 1242 to be condensed.

Fig. 15 is a sectional view taken along line D-D in fig. 13 of the second embodiment of the oil separating device of the present application. As shown in fig. 15, the specific structure inside the oil separation chamber of the oil separation device is substantially the same as that of the oil separation chamber of the condenser shown in fig. 5, and differs from the oil separation device in fig. 14 in that: in the embodiment shown in fig. 15, where the barrier is a filter screen 1534 rather than a barrier plate, the mixing area 1550 for gaseous refrigerant is generally near the filter screen 1534.

Fig. 16 is a sectional view taken along line D-D in fig. 13 of the third embodiment of the oil separating device of the present application. As shown in fig. 16, the specific structure inside the oil separation chamber of the oil separation device is substantially the same as that of the oil separation chamber of the condenser shown in fig. 6, and differs from the oil separation device in fig. 14 in that: the left end of the first baffle 1631 and the right end of the second baffle 1632 are designed in the shape of a box with an open top.

Fig. 17 is a cross-sectional view taken along line D-D in fig. 13 of a fourth embodiment of an oil separation device according to the present application. As shown in fig. 17, the specific structure inside the oil separation chamber of the oil separation device is substantially the same as that of the oil separation chamber of the condenser shown in fig. 7, and differs from the oil separation device in fig. 14 in that: the first flow guide passageway 1745 and the second flow guide passageway 1746 are respectively formed of a flow guide tube.

Fig. 18 is a cross-sectional view taken along line D-D in fig. 13 of a fifth embodiment of an oil separation device according to the present application. As shown in fig. 18, the specific structure inside the oil separation chamber of the oil separation device is substantially the same as that of the oil separation chamber of the condenser shown in fig. 8, and differs from the oil separation device in fig. 14 in that: the first guide passage 1845 is formed by a guide straight pipe 1864, and an outlet 1845b of the first guide passage 1845 is provided at a lower end of the first guide passage 1845. A second flow guide passageway 1846 is formed by flow guide barrier 1863 and housing 1301, second flow guide passageway 1846 having an outlet 1846b disposed at its left end and an additional outlet 1843 disposed at its right end. Wherein the outlet 1846b of the second flow guide passage 1846 is proximate to the outlet 1845b of the first flow guide passage 1845 and the additional outlet 1843 of the second flow guide passage 1846 is distal to the outlet 1845b of the first flow guide passage 1845.

In the embodiment shown in fig. 18, the oil separating device comprises only one communication port 1841, which is arranged at the rear side of the middle of the housing of the oil separating device, the first filter screen 1875 is arranged between the outlet 1846b of the second flow guide channel 1846 and the communication port 1841, and the additional filter screen 1877 is arranged between the additional outlet 1843 of the second flow guide channel 1846 and the communication port 1841.

Fig. 19 is a sectional view taken along line D-D in fig. 13 of a sixth embodiment of an oil separation device according to the present application. As shown in fig. 19, the specific structure inside the oil separation chamber of the oil separation device is substantially the same as that of the oil separation chamber of the condenser shown in fig. 19, and differs from the oil separation device in fig. 14 in that: the outlet of the first guide passage 1945 is opposite to the outlet of the second guide passage 1946, and is staggered by a distance in the height direction.

Fig. 20 is a sectional view taken along line D-D in fig. 13 of the seventh embodiment of the oil separating device of the present application. As shown in fig. 20, the specific structure inside the oil separation chamber of the oil separation device is substantially the same as that of the oil separation chamber of the condenser shown in fig. 10, and differs from the oil separation device in fig. 14 in that: first and second diversion passages 2045 and 2046 each extend from both ends of the oil separation device housing toward the middle to cross over each other.

Fig. 21 is a cross-sectional view taken along line D-D in fig. 13 of an eighth embodiment of an oil separation device according to the present application. As shown in fig. 21, the specific structure of the inside of the oil separation chamber of the oil separation device is substantially the same as that of the inside of the oil separation chamber of the condenser shown in fig. 11, and differs from the oil separation device in fig. 14 in that: the first flow guide passage 2145 and the second flow guide passage 2146 are vertical passages formed by the flow guide straight tubes 2164 and 2169, respectively, which extend side by side longitudinally from the middle of the oil separation device housing into the oil separation chamber 1315.

Similar to the condenser, the oil separator 1283 allows the mixture of the refrigerant and the lubricant oil discharged from the first compressor 1208 and the second compressor 1209 to be mixed in the oil separation chamber 1315 and then separated into two uniform streams for filtering when the displacement of the first compressor 1208 is smaller than the displacement of the second compressor 1209. The oil separator 1283 thus does not require the oil separation chamber 1315 to be sized to the displacement of the large displacement compressor (i.e., the second compressor 1209) to adequately filter and separate the gaseous refrigerant and the lubricant. This enables the oil separation chamber 1315 to be small in size, resulting in a small overall size of the oil separating apparatus 1283.

It follows that, particularly for refrigeration systems comprising two compressors of unequal displacement, the condenser of the present application can be dimensioned smaller than existing condensers with built-in oil separation members; and the oil separating device of the present application can also be made smaller in size than existing oil separating devices.

Although the present application will be described with reference to the particular embodiments shown in the drawings, it should be understood that many variations of the condenser and oil separation apparatus of the present application are possible without departing from the spirit and scope and background of the teachings of the present application. Those of ordinary skill in the art will also realize that there are different ways of varying the details of the structures in the embodiments disclosed in this application that fall within the spirit and scope of the application and the claims.

Claims (38)

1. An oil separating device characterized in that: the oil separating device includes:

a housing including an oil separation chamber therein;

a first refrigerant inlet and a second refrigerant inlet provided on the housing;

a first diversion passage disposed in the oil separation chamber, the first diversion passage having an inlet and an outlet, the inlet of the first diversion passage being in fluid communication with the first refrigerant inlet to divert at least a portion of refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion passage to the outlet of the first diversion passage; and

a second flow directing passage disposed in the oil separation chamber, the second flow directing passage having an inlet and an outlet, the inlet of the second flow directing passage being in fluid communication with the second refrigerant inlet to direct at least a portion of refrigerant gas entering the second refrigerant inlet from the inlet of the second flow directing passage to the outlet of the second flow directing passage;

wherein the first and second flow guide passages are configured to: so that the refrigerant gas flowing out of the outlet of the first flow guiding passage and the refrigerant gas flowing out of the outlet of the second flow guiding passage can be mixed.

2. The oil separating device according to claim 1, wherein:

the outlet of the first flow guide passage and the outlet of the second flow guide passage are adjacent to each other.

3. The oil separating device according to claim 2, wherein: the oil separating device further includes:

at least one communication port for fluid communication with a condensing device;

the at least one filter screen is arranged in the oil separation cavity transversely to the length direction of the shell;

wherein the at least one filter screen is disposed between the at least one communication port and the outlet of the first flow guide passage and the outlet of the second flow guide passage 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.

4. The oil separating device according to claim 3, characterized in that:

the at least one communication port comprises two communication ports which are respectively arranged at two opposite ends of the shell in the length direction;

the at least one filter screen comprises a first filter screen and a second filter screen;

the first filter screen is arranged between the outlet of the first flow guide channel and one of the two communication ports;

the second filter screen is arranged between the outlet of the second flow guide channel and the other communication port of the two communication ports.

5. The oil separating device according to claim 1, wherein:

the first flow guide passage and the second flow guide passage extend from opposite ends of the housing in the length direction toward the middle of the housing along the length direction of the housing;

wherein the outlet of the first flow guide channel and the outlet of the second flow guide channel are arranged to: the shell is spaced apart in the length direction of the shell or staggered by a distance in the length direction perpendicular to the shell.

6. The oil separating device according to claim 5, wherein:

the outlet of the first flow directing passage is disposed between the outlet of the second flow directing passage and the inlet of the first flow directing passage; and is

The outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the second flow guide passage.

7. The oil separating device according to claim 5, wherein:

the outlet of the first flow directing passage is disposed between the outlet of the second flow directing passage and the inlet of the second flow directing passage; and is

The outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the first flow guide passage.

8. The oil separating device according to claim 6, wherein: the oil separating device further includes:

a barrier disposed between the outlet of the first flow-directing channel and the outlet of the second flow-directing channel.

9. The oil separating device according to claim 8, wherein:

the blocking piece is a blocking plate or a filter screen.

10. The oil separating device according to claim 8, wherein:

the position and size of the barrier are set to: the blocking member may at least partially block the outlet of the first guide passage and the outlet of the second guide passage in a length direction of the housing.

11. The oil separating device according to claim 5, wherein:

the first flow guide channel is formed by a first flow guide partition plate and the shell, and the second flow guide channel is formed by a second flow guide partition plate and the shell.

12. The oil separating device according to claim 11, wherein:

the middle parts of the first flow guide partition plate and/or the second flow guide partition plate are bent to form an upper plate and a lower plate with a certain included angle.

13. The oil separating device according to claim 5, wherein:

the first flow guide channel is formed by a first flow guide pipe, and the second flow guide channel is formed by a second flow guide pipe.

14. The oil separating device according to claim 3, characterized in that:

the second flow directing passage has an additional outlet disposed away from the outlet of the first flow directing passage;

the at least one communication port comprises a communication port which is positioned between the outlet of the second diversion channel and the additional outlet;

the at least one filter screen comprises a filter screen, and the filter screen is arranged between the outlet of the second flow guide channel and the communication port;

the oil separation device further comprises an additional filter screen, and the additional filter screen is arranged between the additional outlet of the second flow guide channel and the communication port.

15. The oil separating device according to claim 14, wherein:

the first flow guide passage extends longitudinally from one end of the housing in the longitudinal direction toward the oil separation chamber of the housing, and the second flow guide passage extends from the other end of the housing in the longitudinal direction toward the first flow guide passage.

16. The oil separating device according to claim 15, wherein:

the first flow guide channel is formed by a flow guide straight pipe, and the second flow guide channel is formed by a flow guide partition plate and the shell.

17. The oil separating device according to claim 4, wherein:

the first diversion passage and the second diversion passage extend from the middle of the shell to the oil separation cavity of the shell in a longitudinal direction in parallel, and the first diversion passage and the second diversion passage are both formed by diversion straight pipes;

wherein the first flow guide channel is arranged close to the second flow guide channel.

18. The oil separating device according to claim 3, characterized in that:

the at least one communication port is disposed on the housing for fluid communication with the condensing means in the condenser.

19. A condenser, characterized by: the condenser includes:

the shell is internally provided with a cavity;

the oil separation baffle is arranged in the shell and extends along the length direction of the shell, the oil separation baffle divides the containing cavity into an oil separation cavity and a condensation cavity, and the oil separation baffle comprises at least one communication port which is communicated with the oil separation cavity and the condensation cavity;

a first refrigerant inlet and a second refrigerant inlet provided on the housing;

a first diversion passage disposed in the oil separation chamber, the first diversion passage having an inlet and an outlet, the inlet of the first diversion passage being in fluid communication with the first refrigerant inlet to divert at least a portion of refrigerant gas entering the first refrigerant inlet from the inlet of the first diversion passage to the outlet of the first diversion passage; and

a second flow directing passage disposed in the oil separation chamber, the second flow directing passage having an inlet and an outlet, the inlet of the second flow directing passage being in fluid communication with the second refrigerant inlet to direct at least a portion of refrigerant gas entering the second refrigerant inlet from the inlet of the second flow directing passage to the outlet of the second flow directing passage;

wherein the first and second flow guide passages are configured to: so that the refrigerant gas flowing out of the outlet of the first flow guiding passage and the refrigerant gas flowing out of the outlet of the second flow guiding passage can be mixed.

20. The condenser of claim 19, wherein:

the outlet of the first flow guide passage and the outlet of the second flow guide passage are adjacent to each other.

21. The condenser of claim 20, wherein: the condenser further comprises:

at least one communication port for fluid communication with a condensing device;

the at least one filter screen is arranged in the oil separation cavity in a direction perpendicular to the length direction of the shell;

wherein the at least one filter screen is disposed between the at least one communication port and the outlet of the first flow guide passage and the outlet of the second flow guide passage 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.

22. The condenser of claim 21, wherein:

the at least one communication port comprises two communication ports which are respectively arranged at two opposite ends of the shell in the length direction;

the at least one filter screen comprises a first filter screen and a second filter screen;

the first filter screen is arranged between the outlet of the first flow guide channel and one of the two communication ports;

the second filter screen is arranged between the outlet of the second flow guide channel and the other communication port of the two communication ports.

23. The condenser of claim 19, wherein:

the first flow guide passage and the second flow guide passage extend from opposite ends of the housing in the length direction toward the middle of the housing along the length direction of the housing;

wherein the outlet of the first flow guide channel and the outlet of the second flow guide channel are arranged to: the shell is spaced apart in the length direction of the shell or staggered by a distance in the length direction perpendicular to the shell.

24. The condenser of claim 23, wherein:

the outlet of the first flow directing passage is disposed between the outlet of the second flow directing passage and the inlet of the first flow directing passage; and is

The outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the second flow guide passage.

25. The condenser of claim 23, wherein:

the outlet of the first flow directing passage is disposed between the outlet of the second flow directing passage and the inlet of the second flow directing passage; and is

The outlet of the second flow guide passage is disposed between the outlet of the first flow guide passage and the inlet of the first flow guide passage.

26. The condenser of claim 24, wherein: the condenser further comprises:

a barrier disposed between the outlet of the first flow-directing channel and the outlet of the second flow-directing channel.

27. The condenser of claim 26, wherein:

the blocking piece is a blocking plate or a filter screen.

28. The condenser of claim 26, wherein:

the position and size of the barrier are set to: the blocking member may at least partially block the outlet of the first guide passage and the outlet of the second guide passage in a length direction of the housing.

29. The condenser of claim 23, wherein:

the first flow guide channel is formed by a first flow guide partition plate and the shell, and the second flow guide channel is formed by a second flow guide partition plate and the shell.

30. The condenser of claim 23, wherein:

the first flow guide channel is formed by a first flow guide pipe, and the second flow guide channel is formed by a second flow guide pipe.

31. The condenser of claim 21, wherein:

the second flow directing passage has an additional outlet disposed away from the outlet of the first flow directing passage;

the at least one communication port comprises a communication port which is positioned between the outlet of the second diversion channel and the additional outlet;

the at least one filter screen comprises a filter screen, and the filter screen is arranged between the outlet of the second flow guide channel and the communication port;

the condenser further comprises an additional filter screen, and the additional filter screen is arranged between the additional outlet of the second flow guide channel and the communication port.

32. The condenser of claim 31, wherein:

the first flow guide passage extends longitudinally from one end of the housing in the longitudinal direction toward the oil separation chamber of the housing, and the second flow guide passage extends from the other end of the housing in the longitudinal direction toward the first flow guide passage.

33. The condenser of claim 32, wherein:

the first flow guide channel is formed by a flow guide straight pipe, and the second flow guide channel is formed by a flow guide partition plate and the shell.

34. The condenser of claim 22, wherein:

the first diversion passage and the second diversion passage extend from the middle of the shell to the oil separation cavity of the shell in a longitudinal direction in parallel, and the first diversion passage and the second diversion passage are both formed by diversion straight pipes;

wherein the first flow guide channel is arranged close to the second flow guide channel.

35. A refrigeration system, characterized by: the refrigeration system includes:

a compressor unit;

an oil separation device, wherein the oil separation device is an oil separation device according to any one of claims 1-18;

a condenser;

a throttling device; and

an evaporator;

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 connected in parallel between the oil separating device and the evaporator;

the air suction port of the first compressor and the air suction port of the second compressor are connected with the evaporator;

and wherein the discharge port of the first compressor is connected to the first refrigerant inlet of the oil separating device, and the discharge port of the second compressor is connected to the second refrigerant inlet of the oil separating device.

36. The refrigeration system of claim 35, wherein:

the displacement of the first compressor is less than the displacement of the second compressor.

37. A refrigeration system, characterized by: the refrigeration system includes:

a compressor unit;

a condenser, wherein the condenser is according to any one of claims 19-34;

a throttling device; and

an evaporator;

the compressor unit, the condenser, the throttling device and the evaporator are sequentially connected to form a refrigerant circulating loop;

wherein, the compressor unit includes: a first compressor and a second compressor connected in parallel between the condenser and the evaporator;

the air suction port of the first compressor and the air suction port of the second compressor are connected with the evaporator;

and wherein a discharge port of the first compressor is connected to the first refrigerant inlet of the condenser and a discharge port of the second compressor is connected to the second refrigerant inlet of the condenser.

38. The refrigeration system of claim 37, wherein:

the displacement of the first compressor is less than the displacement of the second compressor.

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