Compression device and heat exchange system

Abstract

The invention discloses a compression device and a heat exchange system, and relates to the technical field of compression devices.The compression device comprises a machine shell and a compression assembly, and the machine shell is provided with a containing cavity; the compression assembly is arranged in the containing cavity and provided with a first compression cavity, a second compression cavity, a first air suction channel, a second air suction channel and a connecting channel. The first air suction channel communicates with the first compression cavity and is used for allowing the first compression cavity to suck air; the second air suction channel communicates with the second compression cavity and is used for allowing the second compression cavity to suck air; the connecting channel is communicated with the first air suction channel and the second air suction channel; according to the technical scheme, pressure fluctuation of air suction ports of the first air suction channel and the second air suction channel can be restrained, and the air suction amount of the first air suction channel and the second air suction channel is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of compression devices, and particularly to a compression device and a heat exchange system. Background Art

[0002] During operation, the double-suction compression device in the prior art sucks air externally through the suction port. In the entire suction cycle of the compression device, the volume change rate of the suction cavity is not constant. Therefore, the suction rate of the suction port shows periodic changes, which will cause pressure fluctuations at the suction port, resulting in a decrease in the suction volume affected by the pressure fluctuations at the suction port. Summary of the Invention

[0003] The main object of the present invention is to propose a compression device and a heat exchange system, aiming to improve the problem of large pressure fluctuations at the suction port of the double-suction compression device in the prior art.

[0004] To achieve the above object, a compression device proposed by the present invention includes:

[0005] A housing having a receiving cavity; and

[0006] A compression assembly disposed in the receiving cavity, the compression assembly having a first compression cavity, a second compression cavity, a first suction channel, a second suction channel, and a connection channel;

[0007] The first suction channel is communicated with the first compression cavity for sucking air into the first compression cavity;

[0008] The second suction channel is communicated with the second compression cavity for sucking air into the second compression cavity;

[0009] The connection channel communicates the first suction channel and the second suction channel.

[0010] In one embodiment, the compression assembly includes a first compression cylinder and a second compression cylinder. The first compression cylinder has the first compression cavity and the first suction channel, and the second compression cylinder has the second compression cavity and the second suction channel;

[0011] The connection channel includes a first sub-channel disposed in the first compression cylinder and a second sub-channel disposed in the second compression cylinder; a first end of the first sub-channel is communicated with the first suction channel, a second end of the first sub-channel is communicated with a first end of the second sub-channel, and a second end of the second sub-channel is communicated with the second suction channel.

[0012] In one embodiment, the casing is in the shape of a cylinder, the first compression cylinder and the second compression cylinder are arranged along the axial direction of the casing and are adjacent to each other, the first sub-channel and the second sub-channel extend along the axial direction of the casing respectively, and the first sub-channel and the second sub-channel are coaxially arranged.

[0013] In one embodiment, the compression assembly further includes a middle partition plate, and the middle partition plate is arranged between the first compression cylinder and the second compression cylinder;

[0014] The connecting channel further includes a communication hole arranged on the middle partition plate, a first end of the communication hole communicates with the first sub-channel, and a second end of the communication hole is connected to the second sub-channel.

[0015] In one embodiment, the first suction channel includes a first suction section and a second suction section that are connected in the air flow direction, and the cross-sectional area of the second suction section is not less than that of the first suction section;

[0016] And / or, the second suction channel includes a third suction section and a fourth suction section that are connected in the air flow direction, and the cross-sectional area of the fourth suction section is not less than that of the third suction section.

[0017] In one embodiment, the compression assembly further includes a middle partition plate, the middle partition plate is arranged between the first compression cylinder and the second compression cylinder, the connecting channel is arranged on the middle partition plate, a first end of the connecting channel communicates with the second suction section, and a second end of the connecting channel communicates with the fourth suction section;

[0018] The first suction section is integrally formed by the first compression cylinder, and the second suction section is formed by enclosing the first compression cylinder and the middle partition plate;

[0019] And / or, the third suction section is integrally formed by the second compression cylinder, and the fourth suction section is formed by enclosing the second compression cylinder and the middle partition plate.

[0020] In one embodiment, a first check assembly is arranged in the first suction channel, and the first check assembly is located between the connecting channel and the first compression cavity for restricting the medium in the first compression cavity from flowing back to the connecting channel.

[0021] In one embodiment, the first check assembly includes a first baffle plate, and the first baffle plate is rotatably arranged in the first suction channel between an open position and a closed position. In the open position, the first baffle plate opens the first suction channel, and in the closed position, the first baffle plate cuts off the first suction channel to restrict the medium in the first compression cavity from flowing back to the connecting channel.

[0022] In one embodiment, the first baffle is rotatably connected to the inner wall of the first suction channel through a first rotating shaft, and there is a spacing between the first baffle and the first compression chamber at any rotation position.

[0023] In one embodiment, a first limiting member is provided in the first suction channel. When the first baffle is in the closed position, it abuts against the first limiting member to limit the rotation of the first baffle.

[0024] In one embodiment, a second check component is provided in the second suction channel. The second check component is located between the connection channel and the second compression chamber to limit the medium in the second compression chamber from flowing back to the connection channel.

[0025] In one embodiment, the second check component includes a second baffle. The second baffle is rotatably provided in the second suction channel between an open position and a closed position. In the open position, the second baffle opens the second suction channel. In the closed position, the second baffle cuts off the second suction channel to limit the medium in the second compression chamber from flowing back to the connection channel.

[0026] In one embodiment, the second baffle is rotatably connected to the inner wall of the second suction channel through a second rotating shaft, and there is a spacing between the second baffle and the second compression chamber at any rotation position.

[0027] In one embodiment, a second limiting member is provided in the second suction channel. When the second baffle is in the closed position, it abuts against the second limiting member to limit the rotation of the second baffle.

[0028] The present invention also provides a heat exchange system, including the compression device described in any of the above embodiments.

[0029] In the present invention, a connection channel is further provided in the compression assembly. The connection channel communicates the first suction channel and the second suction channel, so that when the suction rate of the first compression chamber is greater than that of the second compression chamber, the first suction channel sucks part of the gas refrigerant in the second suction channel through the connection channel; or when the suction rate of the second compression chamber is greater than that of the first compression chamber, the second suction channel sucks part of the gas in the first suction channel through the connection channel to suppress the pressure fluctuation of the suction ports of the first suction channel and the second suction channel and indirectly increase the suction volume of the first suction channel and the second suction channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 Schematic structural diagram of an embodiment of the compression device provided by the present invention;

[0032] Figure 2 For Figure 1 Schematic cross-sectional structure diagram of A-A in

[0033] Figure 3 Schematic structural diagram of the suction rate of the first compression cylinder in the compression device being greater than that of the second compression cylinder;

[0034] Figure 4 Schematic structural diagram of the suction rate of the second compression cylinder in the compression device being greater than that of the first compression cylinder;

[0035] Figure 5 Schematic structural diagram of the check valve assembly provided by the present invention;

[0036] Figure 6 Schematic diagram of the pressure fluctuation at the suction port of a conventional compression device;

[0037] Figure 7 Schematic diagram of the pressure fluctuation at the suction port of the compression device provided by the present invention.

[0038] Explanation of the reference numerals in the drawings:

[0039] 1. Compression device; 10. Machine shell; 20. Compression assembly; 21. First compression cylinder; 211. First compression chamber; 212. First suction channel; 212a. First suction section; 212b. Second suction section; 22. Second compression cylinder; 221. Second compression chamber; 222. Second suction channel; 222a. Third suction section; 222b. Fourth suction section; 23. Intermediate partition; 24. Connection channel; 241. First sub-channel; 242. Second sub-channel; 243. Communication hole; 25. First check valve assembly; 251. First baffle; 252. First rotating shaft; 26. Second check valve assembly; 261. Second baffle; 262. Second rotating shaft; 27. First limiting member; 28. Second limiting member.

[0040] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0042] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0044] A rolling rotor compressor mainly consists of components such as a compression cylinder, a roller, a sliding vane, upper and lower bearings, and an exhaust valve. Its working principle is that through the rotation of the roller, the gaseous refrigerant is inhaled from the suction hole of the compression cylinder, and the gaseous refrigerant is compressed through the action of the sliding vane, and finally discharged from the exhaust hole of the compression cylinder. The high-temperature and high-pressure refrigerant discharged from the exhaust hole of the compression cylinder then passes through a muffler in sequence, bypasses the stator and rotor of the motor, and finally is discharged from the compressor exhaust pipe.

[0045] A double-suction single-discharge rolling rotor compressor is an improved rolling rotor compressor, that is, the compression cylinder has two sets of pump body components. The working process of one set of pump body components is as shown above, and the other set of pump body components inhale gaseous refrigerant through the suction port and then compress it, and after the compression is completed, it is discharged from the exhaust hole of the compression cylinder.

[0046] The double-suction double-row rolling rotor compressor is an improved rolling rotor compressor, which is provided with two sets of pump body components. The working process of one set of pump body components is as shown above. The other set of pump body components discharges the high-temperature and high-pressure refrigerant discharged from the exhaust hole of the compression cylinder through a muffler and then directly discharges it from the compressor through a pipeline. The working components of the former are the non-direct discharge side, and the working components of the latter are the direct discharge side. This working mode enables the compressor to simultaneously suck refrigerants with two suction pressures and compress and discharge refrigerants with two discharge pressures.

[0047] In the double-suction single-row rolling rotor compressor and the double-suction double-row rolling rotor compressor, during the entire suction cycle of the compression device, the volumetric change rate of the suction chamber is not constant. Therefore, the suction rate at the suction port shows periodic changes, which will cause pressure fluctuations at the suction port, resulting in a decrease in the suction volume affected by the pressure fluctuations.

[0048] The present invention provides a compression device 1. By modifying the compression assembly 20 in the compression device 1, the problem that the suction volume is reduced due to large fluctuations in the suction port pressure during the operation of the compression device 1 is solved.

[0049] Please refer to Figure 1 and Figure 2 , in an embodiment of the present invention, this compression device 1 includes a housing 10 and a compression assembly 20. Among them, the housing 10 has a receiving cavity (not shown in the figure), and the compression assembly 20 is disposed in the receiving cavity. The compression assembly 20 has a first compression cavity 211, a second compression cavity 221, a first suction channel 212, a second suction channel 222, and a connection channel 24. The first suction channel 212 is communicated with the first compression cavity 211 for sucking air for the first compression cavity 211. The second suction channel 222 is communicated with the second compression cavity 221 for sucking air for the second compression cavity 221. The connection channel 24 communicates the first suction channel 212 and the second suction channel 222.

[0050] In the present invention, the first compression chamber 211, the second compression chamber 221, the first suction passage 212, and the second suction passage 222 can be formed by partitioning the accommodation chamber in the housing 10. Among them, the first compression chamber 211 communicates with the first suction passage 212, and the first suction passage 212 serves as the suction passage of the first compression chamber 211. The second compression chamber 221 communicates with the second suction passage 222, and the second suction passage 222 serves as the suction passage of the second compression chamber 221. Wherein, rollers, sliding vanes, rotating shafts, exhaust ports, and exhaust valves arranged in the exhaust ports are respectively provided in the first compression chamber 211 and the second compression chamber 221. And both the first suction passage 212 and the second suction passage 222 communicate with external equipment to suck in the gaseous refrigerant in the external equipment for compression processing. Since the first suction passage 212 and the second suction passage 222 are independently arranged, the suction ports of the first suction passage 212 and the second suction passage 222 will have a periodic change in the suction rate due to the fluctuation of the volume change rate during the operation of the internal components of the first compression chamber 211 and the second compression chamber 221. As a result, pressure fluctuations are generated at the suction ports of the first suction passage 212 and the second suction passage 222, and the generation of the pressure fluctuations affects the suction volume of the suction ports of the first suction passage 212 and the second suction passage 222. In the present invention, a connection passage 24 is further provided in the compression assembly 20, and the connection passage 24 communicates the first suction passage 212 and the second suction passage 222. Thus, when the suction rate of the first compression chamber 211 is greater than that of the second compression chamber 221, the first suction passage 212 sucks a part of the gaseous refrigerant in the second suction passage 222 through the connection passage 24; or when the suction rate of the second compression chamber 221 is greater than that of the first compression chamber 211, the second suction passage 222 sucks a part of the gas in the first suction passage 212 through the connection passage 24 to suppress the fluctuation of the pressure at the suction ports of the first suction passage 212 and the second suction passage 222.

[0051] Exemplarily, as Figure 6 and Figure 7 shown, Figure 6 shown is the pressure fluctuation generated at the suction port of the conventional compression device 1. Figure 7 shown is the pressure fluctuation generated at the suction port of the compression device 1 in the present invention. By comparison, it can be seen that the pressure fluctuation generated at the suction port of the compression device 1 in the present invention is smaller, so that the fluctuation of the pressure is more stable, which is beneficial to increasing the suction volume of the first suction passage 212 and the second suction passage 222.

[0052] In one embodiment, the compression assembly 20 includes a first compression cylinder 21 and a second compression cylinder 22. The first compression cylinder 21 has the first compression chamber 211 and a first suction passage 212, and the second compression cylinder 22 has the second compression chamber 221 and a second suction passage 222. The connection passage 24 includes a first sub-passage 241 provided in the first compression cylinder 21 and a second sub-passage 242 provided in the second compression cylinder 22. The first end of the first sub-passage 241 communicates with the first suction passage 212, the second end of the first sub-passage 241 communicates with the first end of the second sub-passage 242, and the second end of the second sub-passage 242 communicates with the second suction passage 222. In this embodiment, the compression assembly 20 includes the first compression cylinder 21 and the second compression cylinder 22. Among them, the first compression cylinder 21 has the first compression chamber 211 and the first suction passage 212, and the second compression chamber 221 has the second compression chamber 221 and the second suction passage 222, that is, the first compression chamber 211 and the first suction passage 212 are formed by machining or integrally formed by the first compression cylinder 21, and the second compression chamber 221 and the second suction passage 222 are formed by machining or integrally formed by the second compression cylinder 22. In this regard, no excessive limitation is made. Moreover, the first compression cylinder 21 further has the first sub-passage 241, and the second compression cylinder 22 further has the second sub-passage 242. Among them, the first end of the first sub-passage 241 directly communicates with the first suction passage 212, the second end of the first sub-passage 241 directly communicates with the first end of the second sub-passage 242, and the second end of the second sub-passage 242 directly communicates with the second suction passage 222. In this embodiment, the first sub-passage 241 and the second sub-passage 242 communicate with each other to form the connection passage 24.

[0053] In one embodiment, the casing 10 is provided in a cylindrical shape. The first compression cylinder 21 and the second compression cylinder 22 are arranged adjacent to each other along the axial direction of the casing 10. The first sub-channel 241 and the second sub-channel 242 extend along the axial direction of the casing 10 respectively, and the first sub-channel 241 and the second sub-channel 242 are coaxially arranged. Exemplarily, the casing 10 is provided in a cylindrical shape (not shown in the figure), and the first compression cylinder 21 and the second compression cylinder 22 are arranged adjacent to each other along the axial direction of the casing 10. Among them, the first sub-channel 241 opened on the first compression cylinder 21 and the second sub-channel 242 opened on the second compression cylinder 22 correspond to each other, that is, the projection of the first sub-channel 241 along the axial direction of the casing 10 completely falls on the second sub-channel 242. And to ensure the connection between the first sub-channel 241 and the second sub-channel 242, the first sub-channel 241 extends downward along the axial direction of the casing 10, and the second sub-channel 242 extends upward along the axial direction of the casing 10, so as to achieve mutual connection. In another embodiment, it may be that the first sub-channel 241 extends downward along the axial direction of the casing 10, while the second sub-channel 242 does not extend, or it may be that the second sub-channel 242 extends upward along the axial direction of the casing 10, while the first sub-channel 241 does not extend. No excessive limitation is made on this. In other embodiments, the projection of the first sub-channel 241 along the axial direction of the casing 10 may partially fall on the second sub-channel 242, and no excessive limitation is made on this either.

[0054] Exemplarily, such as Figure 2As shown, the compression assembly 20 further includes a middle partition plate 23, which is arranged between the first compression cylinder 21 and the second compression cylinder 22; the connection channel 24 further includes a communication hole 243 arranged on the middle partition plate 23. The first end of the communication hole 243 is communicated with the first sub-channel 241, and the second end of the communication hole 243 is connected to the second sub-channel 242. In this embodiment, a middle partition plate 23 is further arranged between the first compression cylinder 21 and the second compression cylinder 22. The middle partition plate 23 and the sealing and sound-absorbing assembly at the top of the first compression cylinder 21 jointly enclose a first compression chamber 211, and the middle partition plate 23 and the sealing and sound-absorbing assembly at the bottom of the second compression cylinder 22 jointly enclose a second compression chamber 221. Moreover, the middle partition plate 23 can also strengthen the structural stability between the first compression cylinder 21 and the second compression cylinder 22. In this embodiment, a communication hole 243 is opened on the middle partition plate 23, wherein the first end of the communication hole 243 is communicated with the first sub-channel 241, and the second communicated end is communicated with the second sub-channel 242. In this embodiment, the first sub-channel 241, the communication hole 243, and the second sub-channel 242 are sequentially communicated to form the connection channel 24. In other embodiments, the middle partition plate 23 is arranged between the first compression cylinder 21 with its own first compression chamber 211 and first air intake channel 212 and the second compression cylinder 22 with its own second compression chamber 221 and second air intake channel 222, so as to play a role in strengthening the structural stability between the two. There are no excessive limitations on the specific arrangement of the middle partition plate 23.

[0055] In one embodiment, the first air intake channel 212 includes a first air intake section 212a and a second air intake section 212b that are communicated along the air flow direction, and the cross-sectional area of the second air intake section 212b is not less than that of the first air intake section 212a; and / or, the second air intake channel 222 includes a third air intake section 222a and a fourth air intake section 222b that are communicated along the air flow direction, and the cross-sectional area of the fourth air intake section 222b is not less than that of the third air intake section 222a. In this embodiment, the cross-sectional area of the second air intake section 212b not being less than that of the first air intake section 212a can ensure that the air intake volume of the first compression chamber 211 will not decrease due to the gradual reduction of the first air intake channel 212 along the air flow direction. In another embodiment, the cross-sectional area of the fourth air intake section 222b is also not less than that of the third air intake section 222a, which can also ensure that the air intake volume of the second compression chamber 221 will not decrease due to the gradual reduction of the second air intake channel 222 along the air flow direction.

[0056] Exemplarily, such as Figure 2As shown, in this embodiment, the first intake passage 212 includes a first intake section 212a and a second intake section 212b. Among them, the first intake section 212a is provided on the first compression cylinder 21, and the second intake section 212b is formed by enclosing the middle partition plate 23 and the first compression cylinder 21. The first intake passage 212 arranged in this way can achieve the above functions without special processing; and / or, the second intake passage 222 includes a third intake section 222a and a fourth intake section 222b. Among them, the third intake section 222a is provided on the second compression cylinder 22, and the fourth intake section 222b is formed by enclosing the middle partition plate 23 and the second compression cylinder 22. The second intake passage 222 arranged in this way can also achieve the above functions without special processing.

[0057] In one embodiment, the compression assembly 20 further includes a middle partition plate 23. The middle partition plate 23 is arranged between the first compression cylinder 21 and the second compression cylinder 22. The connection passage 24 is arranged on the middle partition plate 23. The first end of the connection passage 24 is communicated with the second intake section 212b, and the second end of the connection passage 24 is communicated with the fourth intake section 222b; the first intake section 212a is integrally formed by the first compression cylinder 21, and the second intake section 212b is formed by enclosing the first compression cylinder 21 and the middle partition plate 23; and / or, the third intake section 222a is integrally formed by the second compression cylinder 22, and the fourth intake section 222b is formed by enclosing the second compression cylinder 22 and the middle partition plate 23. In this embodiment, the middle partition plate 23 is arranged between the first compression cylinder 21 and the second compression cylinder 22, and the middle partition plate 23 and the first compression cylinder 21 enclose to form the second intake section 212b, and the middle partition plate 23 and the second compression cylinder 22 enclose to form the fourth intake section 222b. The first intake section 212a and the third intake section 222a are respectively integrally formed by the first compression cylinder 21 and the second compression cylinder 22. Specifically, it can be formed by integral casting or formed by later opening. In this regard, no excessive limitation is made. In this embodiment, the connection passage 24 is arranged on the middle partition plate 23, and the first end of the connection passage 24 is directly communicated with the second intake section 212b, and the second end of the connection passage 24 is directly communicated with the fourth intake section 222b. That is to say, in this embodiment, there is no need to respectively open a first sub-channel 241 and a second sub-channel 242 on the first compression cylinder 21 and the second compression cylinder 22 that are connected to the connection passage 24. Arranged in this way, the manufacturing of the first compression cylinder 21 and the second compression cylinder 22 can be made more convenient, and the first compression cylinder 21, the middle partition plate 23 and the second compression cylinder 22 can be assembled without going through the alignment step during assembly, making the assembly more convenient.

[0058] In one embodiment, a first check assembly 25 is provided in the first suction passage 212. The first check assembly 25 is located between the connection passage 24 and the first compression chamber 211 and is configured to restrict the backflow of the medium in the first compression chamber 211 to the connection passage 24. Since the suction rate of the second compression cylinder 22 is high when the suction rate of the first compression cylinder 21 is low, in order to prevent the medium in the first compression cylinder 21 from being sucked through the connection passage 24 when the suction rate of the second compression cylinder 22 is high. Exemplarily, as Figure 4 shown, a first check assembly 25 is provided in the first suction passage 212, and the first check assembly 25 is arranged between the connection passage 24 and the first compression chamber 211. In this way, when the suction rate of the second compression cylinder 22 is greater than that of the first compression cylinder 21, the second compression cylinder 22 will suck the medium in the first suction passage 212 through the connection passage 24. At this time, the first check assembly 25 will be in a semi-open state when the suction force in the first suction passage 212 is weak, preventing the medium in the first compression cylinder 21 from being drawn out. When there is no suction force in the first suction passage 212, the first check assembly 25 is in a closed state under the influence of gravity. In this way, it can effectively prevent the second compression cylinder 22 from sucking the medium in the first compression cylinder 21 through the connection passage 24 and ensure the normal operation of the first compression cylinder 21.

[0059] In one embodiment, the first check assembly 25 includes a first baffle 251. The first baffle 251 is rotatably provided in the first suction passage 212 between an open position and a closed position. In the open position, the first baffle 251 opens the first suction passage 212. In the closed position, the first baffle 251 cuts off the first suction passage 212 to restrict the backflow of the medium in the first compression chamber 211 to the connection passage 24. Exemplarily, as Figure 5As shown, in this embodiment, the first check assembly 25 includes a first baffle 251. The first baffle 251 is rotatably arranged in the first suction passage 212, and the first baffle 251 also has an open position and a closed position. When the first compression cylinder 21 sucks the medium through the first suction passage 212, the first baffle 251 rotates due to the impact of the air flow and thus is in an open state. The specific angle at which the first baffle 251 opens depends on the magnitude of the suction force provided when the first compression cylinder 21 sucks the medium through the first suction passage 212. When the suction force of the first compression cylinder 21 sucking the medium through the first suction passage 212 is the greatest, the first baffle 251 is in the open position. When the first compression cylinder 21 does not suck the medium through the first suction passage 212, the first baffle 251 is in the closed position due to its own gravity. In other embodiments, the first check assembly 25 can also be a one-way valve. Setting the one-way valve between the connection passage 24 and the first compression chamber 211 can also play the same role as the above-mentioned first baffle 251. It is worth mentioning that in the present invention, the first baffle 251 is adopted because if a one-way valve is used as the first check assembly 25, the flow area of the first suction passage 212 will be reduced, while the first baffle 251 rotatably arranged in the first suction passage 212 does not occupy the flow area of the first suction passage 212, so that the flow area of the first suction passage 212 remains unchanged, and thus the flow rate of the first suction passage 212 is guaranteed.

[0060] In one embodiment, the first baffle 251 is rotatably connected to the inner wall of the first suction passage 212 through a first rotating shaft 252, and the first baffle 251 has a spacing from the first compression chamber 211 at any rotation position. Exemplarily, such as Figure 5As shown, the first baffle 251 is rotatably connected to the inner wall of the first suction channel 212 through the first rotating shaft 252. The specific shape of the first baffle 251 can be set with reference to the shape of the cross-section of the first suction channel 212. For example, if the first suction channel 212 is arched, then the first baffle 251 is also arched. It can be understood that the first rotating shaft 252 can be set at any position in the upper half of the first baffle 251, such as at the top of the first baffle 251. In this way, when the first baffle 251 is in the open position, it can fit with the inner wall of the first suction channel 212, so as to reduce the influence on the flow of the medium through the first suction channel 212. To prevent the first baffle 251 from contacting the roller structure in the first compression chamber 211 at any rotating position, a distance needs to be provided between the first baffle 251 and the first compression chamber 211 at any rotating position, that is, the length of the first suction channel 212 occupied by the first baffle 251 at any rotating position needs to be considered. Assuming that the longest length of the first suction channel 212 occupied by the first baffle 251 at any rotating position is L, then the first baffle 251 needs to be rotatably arranged at a position not less than L away from the first compression chamber 211 in the first suction channel 212.

[0061] In an embodiment, a first limiting member 27 is provided in the first suction channel 212. The first baffle 251 abuts against the first limiting member 27 when in the closed position to limit the rotation of the first baffle 251. In this embodiment, the first limiting member 27 can be set at any position in the first suction channel 212, as long as the limiting member can limit the first baffle 251 when it is in the closed position, so that the first baffle 251 can only rotate between the open position and the closed position. It is worth mentioning that the first limiting member 27 can be set on the side away from the first compression chamber 211 when the first baffle 251 is in the closed position. It can be understood that regarding the specific shape of the first limiting member 27, it can be annular or convex. Considering not occupying the flow-through area of the first suction channel 212, the convex shape is preferably considered.

[0062] Exemplarily, such as Figure 2As shown, in this embodiment, the first air suction channel 212 includes a first air suction section 212a and a second air suction section 212b. Among them, the second air suction section 212b is formed by enclosing the middle partition plate 23 and the first compression cylinder 21. In this embodiment, the first compression cylinder 21 has a first sub-channel 241, and the first sub-channel 241 is opened on the first air suction section 212a as close as possible to the first compression chamber 211. The first check valve assembly 25 is arranged at the connection between the first air suction section 212a and the second air suction section 212b. In this embodiment, the first limiting member 27 is the part of the first compression cylinder 21 where the first air suction section 212a and the second air suction section 212b are connected. This part protrudes relative to the second air suction section 212b. Therefore, in this embodiment, there is no need to add a separate first limiting member 27, and the part of the first compression cylinder 21 where the first air suction section 212a and the second air suction section 212b are connected can be used as the first limiting member 27.

[0063] In one embodiment, a second check valve assembly 26 is provided in the second air suction channel 222. The second check valve assembly 26 is located between the connection channel 24 and the second compression chamber 221, and is used to limit the medium in the second compression chamber 221 from flowing back to the connection channel 24. Since when the air suction rate of the first compression cylinder 21 is large, the air suction rate of the second compression cylinder 22 is small, in order to prevent the medium in the second compression cylinder 22 from being sucked through the connection channel 24 when the air suction rate of the first compression cylinder 21 is large. Exemplarily, as Figure 3 shown, a second check valve assembly 26 is provided in the second air suction channel 222, and the second check valve assembly 26 is arranged between the connection channel 24 and the second compression chamber 221. In this way, when the air suction rate of the first compression cylinder 21 is greater than that of the second compression cylinder 22, the first compression cylinder 21 will suck the medium in the second air suction channel 222 through the connection channel 24. At this time, the second check valve assembly 26 will be in a semi-open state when the suction force in the second air suction channel 222 is weak, preventing the medium in the second compression cylinder 22 from being drawn out. And when there is no suction force in the second air suction channel 222, the first check valve assembly 25 is in a closed state under the influence of gravity. In this way, it can effectively prevent the first compression cylinder 21 from sucking the medium in the second compression cylinder 22 through the connection channel 24 and ensure the normal operation of the second compression cylinder 22.

[0064] In one embodiment, the second check valve assembly 26 includes a second baffle 261. The second baffle 261 is rotatably switchable between an open position and a closed position in the second air suction channel 222. In the open position, the second baffle 261 opens the second air suction channel 222. In the closed position, the second baffle 261 cuts off the second air suction channel 222 to limit the medium in the second compression chamber 221 from flowing back to the connection channel 24. Exemplarily, as Figure 5As shown, in this embodiment, the second check component 26 includes a second baffle 261. The second baffle 261 is rotatably arranged in the second suction passage 222, and the second baffle 261 also has an open position and a closed position. When the second compression cylinder 22 sucks the medium through the second suction passage 222, the second baffle 261 rotates due to the impact of the air flow, so as to be in an open state. The specific angle at which the second baffle 261 opens depends on the magnitude of the suction force provided by the second compression cylinder 22 when sucking the medium through the second suction passage 222. When the second compression cylinder 22 sucks the medium through the second suction passage 222 with the greatest force, the second baffle 261 is in the open position. When the second compression cylinder 22 does not suck the medium through the second suction passage 222, the second baffle 261 is in the closed position due to its own gravity. In other embodiments, the second check component 26 can also be a one-way valve. Setting the one-way valve between the connection passage 24 and the second compression chamber 221 can also play the same role as the above-mentioned second baffle 261. It is worth mentioning that in the present invention, the second baffle 261 is adopted because if a one-way valve is used as the second check component 26, the flow area of the second suction passage 222 will be reduced, while the second baffle 261 rotatably arranged in the second suction passage 222 does not occupy the flow area of the second suction passage 222, so that the flow area of the second suction passage 222 remains unchanged, and thus the flow rate of the second suction passage 222 is guaranteed.

[0065] In one embodiment, the second baffle 261 is rotatably connected to the inner wall of the second suction passage 222 through a second rotating shaft 262, and the second baffle 261 has a spacing from the second compression chamber 221 at any rotating position. Exemplarily, such as Figure 5As shown, the second baffle 261 is rotatably connected to the inner wall of the second suction channel 222 through the second rotating shaft 262. The specific shape of the second baffle 261 can be set with reference to the shape of the cross-section of the second suction channel 222. For example, if the second suction channel 222 is arched, then the second baffle 261 is also arched. It can be understood that the second rotating shaft 262 can be set at any position in the upper half of the second baffle 261, such as at the top of the second baffle 261. In this way, when the second baffle 261 is in the open position, it fits with the inner wall of the second suction channel 222, thereby reducing the influence on the flow of the medium through the second suction channel 222. To prevent the second baffle 261 from contacting the roller structure in the second compression chamber 221 at any rotating position, there needs to be a distance between the second baffle 261 and the second compression chamber 221 at any rotating position, that is, the length of the second suction channel 222 occupied by the second baffle 261 at any rotating position needs to be considered. Assume that the longest length of the second suction channel 222 occupied by the second baffle 261 at any rotating position is L1. Then, the second baffle 261 needs to be rotatably arranged at a position in the second suction channel 222 away from the second compression chamber 221 not less than L1.

[0066] In an embodiment, a second limiting member 28 is provided in the second suction channel 222. The second baffle 261 abuts against the second limiting member 28 when in the closed position to limit the rotation of the second baffle 261. In this embodiment, the second limiting member 28 can be set at any position in the second suction channel 222 as long as the limiting member can limit the second baffle 261 when it is in the closed position, so that the second baffle 261 can only rotate between the open position and the closed position. It is worth mentioning that the second limiting member 28 can be set on the side of the second baffle 261 away from the second compression chamber 221 when it is in the closed position. It can be understood that regarding the specific shape of the second limiting member 28, it can be annular or convex. Considering not occupying the flow area of the second suction channel 222, the convex shape is preferably considered.

[0067] Exemplarily, such as Figure 2As shown, in this embodiment, the second suction passage 222 includes a third suction section 222a and a fourth suction section 222b. Among them, the third suction section 222a is formed by enclosing the middle partition 23 and the second compression cylinder 22. In this embodiment, the second compression cylinder 22 has a second sub-channel 242, and the second sub-channel 242 is opened on the third suction section 222a as close as possible to the second compression chamber 221. The second check valve assembly 26 is arranged at the connection between the third suction section 222a and the fourth suction section 222b. In this embodiment, the second limiting member 28 is the part of the second compression cylinder 22 where the third suction section 222a and the fourth suction section 222b are connected. This part protrudes relative to the third suction section 222a. Therefore, in this embodiment, there is no need to add a second limiting member 28, and the part of the second compression cylinder 22 where the third suction section 222a and the fourth suction section 222b are connected can be used as the second limiting member 28.

[0068] The present invention also provides a heat exchange system, which includes a compression device 1. The specific structure of the compression device 1 refers to the above embodiment. Since this heat exchange system adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one. Among them, this heat exchange system can be used in air conditioners, refrigerators, freezers, and water heaters. Exemplarily, this heat exchange system is used in an air conditioner. The air conditioner includes a compression device 1, two sets of condensers, two sets of throttle valves, and two sets of evaporators. The compression device 1 has a first compression chamber 211, a first suction passage 212, a first exhaust port, a second compression chamber 221, a second suction passage 222, and a second exhaust port. The first suction passage 212, the first compression chamber 211, and the first exhaust port are connected in sequence. The second suction passage 222, the second compression chamber 221, and the second exhaust port are connected in sequence. The first exhaust port is connected in series with one set of condenser, one set of throttle valve, and one set of evaporator to form a first heat exchange flow path. The second exhaust port is also connected in series with another set of condenser, another set of throttle valve, and another set of evaporator to form a second heat exchange flow path. In this embodiment, the first heat exchange flow path and the second heat exchange flow path can refrigerate or heat at the same time. Of course, one of them can refrigerate and the other can heat, and no more limitations are made in this regard.

[0069] The above is only an exemplary embodiment of the present invention, and it does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A compression device, characterized in that, Comprising: A housing having a receiving cavity; And A compression assembly disposed in the receiving cavity, the compression assembly having a first compression cavity, a second compression cavity, a first suction channel, a second suction channel, and a connection channel; The first suction channel communicates with the first compression cavity for sucking air into the first compression cavity; The second suction channel communicates with the second compression cavity for sucking air into the second compression cavity; The connection channel connects the first suction channel and the second suction channel.

2. The compression device according to claim 1, wherein The compression assembly includes a first compression cylinder and a second compression cylinder. The first compression cylinder has the first compression cavity and the first suction channel, and the second compression cylinder has the second compression cavity and the second suction channel; The connection channel includes a first sub-channel disposed in the first compression cylinder and a second sub-channel disposed in the second compression cylinder; a first end of the first sub-channel communicates with the first suction channel, a second end of the first sub-channel communicates with a first end of the second sub-channel, and a second end of the second sub-channel communicates with the second suction channel.

3. The compression device according to claim 2, characterized in that, The housing is in a cylindrical shape. The first compression cylinder and the second compression cylinder are arranged adjacent to each other along the axial direction of the housing. The first sub-channel and the second sub-channel extend along the axial direction of the housing respectively, and the first sub-channel and the second sub-channel are coaxially arranged.

4. The compression device according to claim 2, wherein, The compression assembly further includes a middle partition plate disposed between the first compression cylinder and the second compression cylinder; The connection channel further includes a communication hole disposed on the middle partition plate. A first end of the communication hole communicates with the first sub-channel, and a second end of the communication hole is connected to the second sub-channel.

5. The compression device according to claim 2, wherein, The first suction channel includes a first suction section and a second suction section communicating along the air flow direction. The cross-sectional area of the second suction section is not less than that of the first suction section; And / or, the second suction channel includes a third suction section and a fourth suction section communicating along the air flow direction. The cross-sectional area of the fourth suction section is not less than that of the third suction section.

6. The compression device according to claim 5, characterized in that, The compression assembly further includes a middle partition plate disposed between the first compression cylinder and the second compression cylinder. The connection channel is disposed on the middle partition plate. A first end of the connection channel communicates with the second suction section, and a second end of the connection channel communicates with the fourth suction section; The first suction section is integrally formed by the first compression cylinder, and the second suction section is formed by enclosing the first compression cylinder and the middle partition plate; And / or, the third suction section is integrally formed by the second compression cylinder, and the fourth suction section is formed by enclosing the second compression cylinder and the middle partition plate.

7. The compression device according to any one of claims 1 to 6, characterized in that A first check assembly is disposed in the first suction channel. The first check assembly is located between the connection channel and the first compression cavity and is used to limit the backflow of the medium in the first compression cavity to the connection channel.

8. The compression device according to claim 7, wherein The first check assembly includes a first baffle plate, which is rotatably provided in the first intake passage between an open position and a closed position. In the open position, the first baffle plate opens the first intake passage, and in the closed position, the first baffle plate cuts off the first intake passage to limit the backflow of the medium in the first compression chamber to the connection passage.

9. The compression device according to claim 8, wherein, The first baffle plate is rotatably connected to the inner wall of the first intake passage through a first rotating shaft, and there is a distance between the first baffle plate and the first compression chamber at any rotating position.

10. The compression device according to claim 8, wherein A first limiting member is provided in the first intake passage, and the first baffle plate abuts against the first limiting member in the closed position to limit the rotation of the first baffle plate.

11. The compression device according to any one of claims 1 to 6, characterized in that, A second check assembly is provided in the second intake passage. The second check assembly is located between the connection passage and the second compression chamber and is used to limit the backflow of the medium in the second compression chamber to the connection passage.

12. The compression device according to claim 11, characterized in that, The second check assembly includes a second baffle plate, which is rotatably provided in the second intake passage between an open position and a closed position. In the open position, the second baffle plate opens the second intake passage, and in the closed position, the second baffle plate cuts off the second intake passage to limit the backflow of the medium in the second compression chamber to the connection passage.

13. The compression device according to claim 12, wherein The second baffle plate is rotatably connected to the inner wall of the second intake passage through a second rotating shaft, and there is a distance between the second baffle plate and the second compression chamber at any rotating position.

14. The compression device according to claim 12, characterized in that, A second limiting member is provided in the second intake passage, and the second baffle plate abuts against the second limiting member in the closed position to limit the rotation of the second baffle plate.

15. A heat exchange system, characterized in that, Comprising a compression device according to any one of claims 1 to 14.

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