Gas supplementing and enthalpy increasing assembly, pump body assembly, compressor and refrigeration equipment

Abstract

The application provides a gas supplementing and enthalpy increasing assembly, a pump body assembly, a compressor and a refrigeration device. The gas supplementing and enthalpy increasing assembly comprises a base, a first sliding block, a second sliding block, a first elastic reset member and a second elastic reset member. The base is provided with a first sliding groove and a second sliding groove. The groove wall of the first sliding groove is provided with a first compression cavity communication port and a first gas supplementing communication port. The groove wall of the second sliding groove is provided with a second compression cavity communication port and a second gas supplementing communication port. In a first state, the first sliding block is in a first disconnection position, the first compression cavity communication port and the first gas supplementing communication port are not communicated, the second sliding block is in a second connection position, and the second compression cavity communication port and the second gas supplementing communication port are communicated. In a second state, the first sliding block is in a first connection position, the first compression cavity communication port and the first gas supplementing communication port are communicated, the second sliding block is in a second disconnection position, and the second compression cavity communication port and the second gas supplementing communication port are not communicated. The gas supplementing and enthalpy increasing assembly can control the connection between the low-pressure cavity and the gas supplementing channel, thereby realizing the injection of gas supplementing to the compression cavity with small pressure, and effectively preventing the backflow of gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a gas supplementing and enthalpy increasing assembly, a pump body assembly, a compressor and a refrigeration device. BACKGROUND

[0002] Currently, there are some problems in the low-temperature condition of the rolling rotor compressor: first, the compression ratio of the compressor increases, the leakage increases, the volumetric efficiency decreases, the exhaust temperature rises, which leads to the decrease of COP and the decrease of the reliability of the compressor; second, the suction volume decreases, the circulation flow is insufficient, which leads to the decrease of the heating capacity of the air conditioner. Generally, the performance of the system is improved by the method of intermediate gas supplementing. There are two ways of intermediate gas supplementing. One is intermediate gas supplementing in double-stage compression, that is, gas is supplemented on the intermediate connecting pipe between two serial compressors. The other way of gas supplementing is to supplement gas during the compression process of the compressor. At this time, the compressor has a self-injection port, which is called quasi-two-stage compression. The quasi-two-stage rolling rotor compressor can effectively solve the problems of excessive exhaust temperature and insufficient heating capacity of the compressor under low-temperature working conditions, and has good economy.

[0003] Currently, there are two common injection gas supplementing structures of the quasi-two-stage rotor compressor: one is to design a variable volume channel on the partition plate or on the lower flange to connect the internal cavity of the pump body. The opening and closing of the variable volume channel are controlled by the movement track of the roller. The automatic opening and closing of the gas supplementing port are realized at the appropriate position. This structure uses the movement track of the roller to open and close, and the gas supplementing amount is very limited. Moreover, the gas supplementing effect is very different under different working conditions. This structure is limited by the working conditions, which leads to the limited application range of the compressor. The other is to use a valve plate structure on the cylinder to control the gas supplementing. This structure can realize the effective maximum gas supplementing amount under any working condition. However, because the valve plate structure is in the compression chamber, the volumetric efficiency of the compressor is very low. In addition, the gas supplementing port is opened on the cylinder wall near the exhaust port, which can ensure that the gas supplementing time is as long as possible. However, it is inevitable that there is a period of time when the gas supplementing port and the suction port are connected. During this period of time, the medium-pressure gas injected from the gas supplementing port will be injected into the suction chamber, and then flow back to the suction pipe. Therefore, it needs to be improved. SUMMARY

[0004] The first object of the present application is to provide a gas supplementing and enthalpy increasing assembly, which can control the connection between the low-pressure cavity and the gas supplementing channel, so as to realize the injection of gas into the compression chamber with small pressure, and can effectively prevent the gas backflow.

[0005] The second object of the present application is to provide a pump body assembly with the above-mentioned gas supplementing and enthalpy increasing assembly.

[0006] The third object of the present application is to provide a compressor with the above-mentioned pump body assembly.

[0007] The fourth object of the present application is to provide a refrigeration apparatus having the above compressor.

[0008] To achieve the above first object, the present application provides a gas supplementing and enthalpy increasing assembly, comprising a base, a first sliding block, a second sliding block, a first elastic reset member and a second elastic reset member, the base is provided with a first sliding groove and a second sliding groove, the first sliding block is in sliding cooperation with the first sliding groove, and the second sliding block is in sliding cooperation with the second sliding groove; a slot wall of the first sliding groove is provided with a first compression cavity communication port and a first gas supplementing communication port, and a slot wall of the second sliding groove is provided with a second compression cavity communication port and a second gas supplementing communication port; in a first state, the first sliding block is forced to move to a first disconnection position, the first compression cavity communication port and the first gas supplementing communication port are not communicated, the second elastic reset member drives the second sliding block to move to a second communication position, and the second compression cavity communication port and the second gas supplementing communication port are communicated; in a second state, the first elastic reset member drives the first sliding block to move to a first communication position, the first compression cavity communication port and the first gas supplementing communication port are communicated, the second sliding block is forced to move to a second disconnection position, and the second compression cavity communication port and the second gas supplementing communication port are not communicated.

[0009] As can be seen from the above scheme, when the gas supplementing and enthalpy increasing assembly is applied to a compressor, the first compression cavity communication port is communicated with the first compression cavity, and the second compression cavity communication port is communicated with the second compression cavity; when the first compression cavity is a high-pressure cavity and the second compression cavity is a low-pressure cavity, the gas supplementing and enthalpy increasing assembly is in the first state, high-pressure gas in the high-pressure cavity enters the first sliding groove through the first compression cavity communication port, and drives the first sliding block to move to the first disconnection position, at this time, the first compression cavity communication port and the first gas supplementing communication port are not communicated, at the same time, the second sliding block is kept in the second communication position under the action of the elastic restoring force of the second elastic reset member, the second compression cavity communication port and the second gas supplementing communication port are communicated, and the gas entering from the second gas supplementing communication port enters the second compression cavity as a low-pressure cavity from the second compression cavity communication port. When the first compression cavity is a low-pressure cavity and the second compression cavity is a high-pressure cavity, the gas supplementing and enthalpy increasing assembly is in the second state, the first sliding block moves to the first communication position under the action of the first elastic reset member, the second sliding block moves to the second disconnection position under the action of high-pressure gas, and the gas entering from the first gas supplementing communication port enters the first compression cavity as a low-pressure cavity from the first compression cavity communication port. Therefore, the sliding block of the present application moves under the action of the pressure difference between the two compression cavities and the elastic reset member, controls the connection between the low-pressure cavity and the gas supplementing passage, thereby realizing the injection of gas supplementing to the compression cavity with small pressure, and the structure can effectively prevent gas backflow.

[0010] At the same time, the sliding block and the elastic reset member of the gas supplementing and enthalpy increasing assembly are both located in the base, without occupying extra space in the pump body, the structure is compact, the volumetric efficiency of the enthalpy increasing and gas supplementing compressor is effectively improved, the energy efficiency of the compressor is greatly improved, and the operating range of the compressor can be improved without being affected by the working condition.

[0011] Therefore, the gas supplement and enthalpy increasing assembly of the present application can solve the shortcomings of the two existing gas supplement structures, can provide the maximum gas supplement amount to the compressor without being affected by the working condition, can greatly improve the volumetric efficiency of the compressor under the existing gas supplement and enthalpy increasing technology, and can solve the backflow problem in the gas supplement process.

[0012] One preferred scheme is that the first sliding block is provided with a first gas supplement channel, and in the second state, the first compression cavity communication port and the first gas supplement communication port are communicated through the first gas supplement channel; and / or the second sliding block is provided with a second gas supplement channel, and in the first state, the second compression cavity communication port and the second gas supplement communication port are communicated through the second gas supplement channel.

[0013] A further scheme is that the first gas supplement communication port is located on a first slot wall of the first sliding slot, the first slot wall is in sliding fit with the first sliding block, and in the first state, the first slot wall covers an inlet end of the first gas supplement channel; and / or the second gas supplement communication port is located on a second slot wall of the second sliding slot, the second slot wall is in sliding fit with the second sliding block, and in the second state, the second slot wall covers an inlet end of the second gas supplement channel.

[0014] Therefore, through the sliding fit of the first sliding block and the first slot wall, the stable opening and closing of the first gas supplement channel are realized, and through the sliding fit of the second sliding block and the second slot wall, the stable opening and closing of the second gas supplement channel are realized, and the structure is simple.

[0015] One preferred scheme is that along the sliding direction of the first sliding block, the first compression cavity communication port and the first elastic reset member are respectively arranged on opposite sides of the first sliding block; and / or along the sliding direction of the second sliding block, the second compression cavity communication port and the second elastic reset member are respectively arranged on opposite sides of the second sliding block.

[0016] Therefore, by arranging the first compression cavity communication port and the first elastic reset member on opposite sides of the first sliding block respectively, the pushing force of the high-pressure gas and the elastic restoring force of the first elastic reset member received by the first sliding block are maximized. By arranging the second compression cavity communication port and the second elastic reset member on opposite sides of the second sliding block respectively, the pushing force of the high-pressure gas and the elastic restoring force of the second elastic reset member received by the second sliding block are maximized.

[0017] One preferred scheme is that the axial direction of the base is parallel to the vertical direction; the first sliding slot is recessed downward from the upper surface of the base, and the first sliding slot extends along the radial direction or the chordal direction of the base; and / or the second sliding slot is recessed downward from the upper surface of the base, and the second sliding slot extends along the radial direction or the chordal direction of the base.

[0018] Therefore, by arranging the slot opening of the sliding slot upward, the influence of the gravity of the sliding block or other factors is excluded, and it is ensured that the movement of the sliding block is only affected by the pressure difference of the compression cavity.

[0019] A preferred scheme is that the bottom wall of the first chute and the bottom wall of the second chute are both parallel to the horizontal plane.

[0020] Therefore, by designing the bottom wall of the chute to be parallel to the horizontal plane, the slider is further prevented from being affected by gravity.

[0021] A preferred scheme is that the base is provided with a gas supplement opening, and the first gas supplement communication opening and the second gas supplement communication opening are both in communication with the gas supplement opening; or the base is provided with two gas supplement openings, one of which is in communication with the first gas supplement communication opening, and the other of which is in communication with the second gas supplement communication opening.

[0022] Therefore, the gas supplement and enthalpy increasing assembly can be arranged on the pump body partition plate, the cylinder or the flange, and when the gas supplement and enthalpy increasing assembly is arranged on the partition plate, the gas supplement distributor only needs one gas inlet end, which can reduce the number of shell openings and the number of gas supplement bends, thereby effectively saving costs.

[0023] A preferred scheme is that the first chute and the second chute are parallel and arranged close to each other.

[0024] A preferred scheme is that the base is arranged on the pump body partition plate and is integrally formed with the pump body partition plate.

[0025] To achieve the above-mentioned second object, the application provides a pump body assembly, which comprises a first compression cavity, a second compression cavity and the above-mentioned gas supplement and enthalpy increasing assembly; the first compression cavity communication opening is in communication with the first compression cavity, and the second compression cavity communication opening is in communication with the second compression cavity.

[0026] A preferred scheme is that the pump body assembly comprises an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder are arranged along the vertical direction, the first compression cavity is located in the upper cylinder, and the second compression cavity is located in the lower cylinder; the base comprises a first base part and a second base part, the first chute is located on the first base part, and the second chute is located on the second base part.

[0027] A further scheme is that the first base part is located on the upper cylinder and is integrally formed with the upper cylinder, the second base part is located on the lower cylinder and is integrally formed with the lower cylinder, the upper cylinder and the lower cylinder are respectively provided with one gas supplement opening, the gas supplement opening of the upper cylinder is in communication with the first gas supplement communication opening, and the gas supplement opening of the lower cylinder is in communication with the second gas supplement communication opening.

[0028] A further scheme is that the pump body assembly comprises an upper flange and a lower flange, the upper flange is arranged above the upper cylinder, and the lower flange is arranged below the lower cylinder; the first base part is located on the upper flange and is integrally formed with the upper flange, the second base part is located on the lower flange and is integrally formed with the lower flange, the upper flange and the lower flange are respectively provided with one gas supplement opening, the gas supplement opening of the upper flange is in communication with the first gas supplement communication opening, and the gas supplement opening of the lower flange is in communication with the second gas supplement communication opening.

[0029] Therefore, the gas supplementing and enthalpy increasing assembly can be arranged on the flange or the cylinder, and its position can be flexibly adjusted according to requirements.

[0030] To achieve the third purpose, the application provides a compressor comprising the pump body assembly.

[0031] To achieve the fourth purpose, the application provides a refrigeration device comprising the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a sectional view of an embodiment of the compressor of the application.

[0033] Figure 2 is a structural view of a gas supplementing distributor in an embodiment of the compressor of the application.

[0034] Figure 3 is a structural view of an upper cylinder in an embodiment of the compressor of the application.

[0035] Figure 4 is a structural view of a lower cylinder in an embodiment of the compressor of the application.

[0036] Figure 5 is a plan view of a pump body partition plate and a gas supplementing and enthalpy increasing assembly in an embodiment of the compressor of the application.

[0037] Figure 6 is Figure 5 a partial enlarged view at A in FIG.

[0038] Figure 7 is a perspective view of a pump body partition plate and a gas supplementing and enthalpy increasing assembly in an embodiment of the compressor of the application.

[0039] Figure 8 is Figure 7 a partial enlarged view at B in FIG.

[0040] Figure 9 is a structural view of a first sliding block in an embodiment of the compressor of the application.

[0041] Figure 10 is a sectional view of a first sliding block in an embodiment of the compressor of the application.

[0042] Figure 11 is a sectional view of a pump body partition plate, a first sliding block and a first elastic reset member in an embodiment of the compressor of the application.

[0043] Figure 12 is Figure 11 a partial enlarged view at C in FIG.

[0044] Figure 13 is a sectional view of a pump body partition plate, a second sliding block and a second elastic reset member in an embodiment of the compressor of the application.

[0045] Figure 14 is Figure 13 is a partial enlarged view of D in FIG. 6.

[0046] Figure 15 is a sectional view of a partition plate of a pump body in an embodiment of the compressor of the present application.

[0047] Figure 16 is a graph of pressure variation in a double cylinder compression chamber in an embodiment of the compressor of the present application.

[0048] Figure 17 is a schematic view of air supply to a second compression chamber in an embodiment of the compressor of the present application.

[0049] Figure 18 is a schematic view of air supply to a first compression chamber in an embodiment of the compressor of the present application.

[0050] The present application will be further described by the following drawings and examples. DETAILED DESCRIPTION

[0051] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is only meant to be illustrative and not limiting of the present application, its applications or uses. The present application can be carried out in many different ways and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments are meant to be exemplary only, and not as a limitation of the present application unless otherwise specifically stated.

[0052] The terms "first", "second", and similar terms in the present application do not denote any order, quantity, or importance, but are used to distinguish different parts. The terms "include", "comprise", and similar terms mean that the elements before the terms encompass the elements listed after the terms, and do not exclude the possibility of also encompassing other elements. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0053] In the present application, when it is described that a certain device is located between a first device and a second device, there can be an intervening device between the certain device and the first device or the second device, or there can be no intervening device. When it is described that a certain device is connected to other devices, the certain device can be directly connected to the other devices without an intervening device, or can not be directly connected to the other devices with an intervening device.

[0054] All the terms used in the present application, including technical terms or scientific terms, have the same meanings as understood by those of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted in a manner consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formalized sense, unless otherwise specifically defined herein.

[0055] Techniques, methods, and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification where appropriate.

[0056] Referring to Figures 1 to 4 The refrigeration device of the embodiment comprises a compressor, which comprises a shell 11, a suction distributor 12, a charge distributor 13, a motor 14, and a pump body assembly 15. The pump body assembly 15 is of a double-cylinder structure.

[0057] The pump body assembly 15 comprises an upper cylinder 21, a lower cylinder 22, a crankshaft 23, a pump body partition 24, an upper flange 25, and a lower flange 26, and a charge superposition assembly 3.

[0058] The upper flange 25, the upper cylinder 21, the pump body partition 24, the lower cylinder 22, and the lower flange 26 are arranged in sequence along a vertical direction, the crankshaft 23 is provided with an upper eccentric portion 231 and a lower eccentric portion 232 arranged at intervals, the upper eccentric portion 231 is opposite to the lower eccentric portion 232 in eccentric direction, an upper roller 291 is arranged at the upper eccentric portion 231, and a lower roller 292 is arranged at the lower eccentric portion 232, and the upper roller 291 is located in the upper cylinder 21, and the lower roller 292 is located in the lower cylinder 22.

[0059] Referring to Figures 5 to 15 The charge superposition assembly 3 comprises a base 4, a first sliding block 5, a second sliding block 6, a first elastic return member 7, and a second elastic return member 8. In the embodiment, the base 4 is at least a part of the pump body partition 24, that is, the base 4 is arranged on the pump body partition 24 and is integrally formed with the pump body partition 24, or the pump body partition 24 is the base 4. Preferably, the first elastic return member 7 and the second elastic return member 8 are both springs.

[0060] The base 4 is provided with a charge port 41, a first sliding groove 42, and a second sliding groove 43, and the first sliding groove 42 and the second sliding groove 43 are parallel and arranged close to each other.

[0061] The slot wall of the first sliding groove 42 is provided with a first compression cavity communication port 421 and a first air supplement communication port 422, the upper air cylinder 21 is provided with an upper air cylinder communication port 212, the upper surface of the pump body partition plate 24 is provided with a first partition plate communication port 241, the first compression cavity communication port 421, the first partition plate communication port 241, the upper air cylinder communication port 212 and the first compression cavity 211 of the upper air cylinder 21 are sequentially communicated, along the sliding direction of the first sliding block 5, the first compression cavity communication port 421 and the first elastic return member 7 are respectively arranged on the opposite sides of the first sliding block 5, the first air supplement communication port 422 is located on the first slot wall 420 of the first sliding groove 42, and the first slot wall 420 is in sliding cooperation with the first sliding block 5.

[0062] The slot wall of the second sliding groove 43 is provided with a second compression cavity communication port 431 and a second air supplement communication port 432, the lower air cylinder 22 is provided with a lower air cylinder communication port 222, the lower surface of the pump body partition plate 24 is provided with a second partition plate communication port 242, the second compression cavity communication port 431, the second partition plate communication port 242, the lower air cylinder communication port 222 and the second compression cavity 221 of the lower air cylinder 22 are sequentially communicated, along the sliding direction of the second sliding block 6, the second compression cavity communication port 431 and the second elastic return member 8 are respectively arranged on the opposite sides of the second sliding block 6, the second air supplement communication port 432 is located on the second slot wall 430 of the second sliding groove 43, and the second slot wall 430 is in sliding cooperation with the second sliding block 6. The first air supplement communication port 422 and the second air supplement communication port 432 are in communication with the air supplement port 41, and the air supplement port 41 is arranged on the side peripheral wall of the pump body partition plate 24. When the air supplement and enthalpy increasing assembly 3 is designed on the pump body partition plate 24, the air supplement distributor 13 only needs one air inlet end, the number of openings of the shell 11 and the number of air supplement bends can be reduced, and the cost can be effectively saved.

[0063] The axial direction of the pump body partition plate 24 is parallel to the vertical direction, the first sliding groove 42 is recessed downward from the upper surface of the pump body partition plate 24, the first sliding groove 42 extends along the radial direction or the chordal direction of the pump body partition plate 24, the second sliding groove 43 is recessed downward from the upper surface of the pump body partition plate 24, the second sliding groove 43 extends along the radial direction or the chordal direction of the pump body partition plate 24, and the bottom wall of the first sliding groove 42 and the bottom wall of the second sliding groove 43 are both parallel to the horizontal plane, so that the sliding block moves along the horizontal direction, so as to exclude the influence of gravity or other factors of the sliding block, and ensure that the sliding block moves only under the pressure difference of the compression cavity.

[0064] The first sliding block 5 is provided with a first air supplement channel 51, the second sliding block 6 is provided with a second air supplement channel 61, the first sliding block 5 and the second sliding block 6 are both rectangular solids, the first air supplement channel 51 and the second air supplement channel 61 are both L-shaped, the outlet end of the air supplement channel and the positioning groove for mounting the elastic return member are respectively located at the center positions of the corresponding side walls of the corresponding sliding blocks, only one kind of sliding block structure needs to be processed, and the sliding block is rotated according to the positions of the air supplement communication port, the compression cavity communication port and the inlet end and the outlet end of the air supplement channel, and is matched with the corresponding sliding groove.

[0065] The first sliding block 5 is provided with a positioning groove 52 away from the side wall of the first compression cavity communication port 421, and the first elastic reset member 7 is installed in the positioning groove 52. The elastic restoring force of the first elastic reset member 7 drives the first sliding block 5 to move from the first disconnected position to the first communication position. When the first sliding block 5 is in the first communication position, the inlet end of the first air supplement channel 51 is opposite to and communicates with the first air supplement communication port 422, and the outlet end of the first air supplement channel 51 is opposite to and communicates with the first compression cavity communication port 421. When the first sliding block 5 is in the first disconnected position, the first groove wall 420 covers the inlet end of the first air supplement channel 51.

[0066] The second sliding block 6 is provided with a positioning groove 62 away from the side wall of the second compression cavity communication port 431, and the second elastic reset member 8 is installed in the positioning groove 62. The elastic restoring force of the second elastic reset member 8 drives the second sliding block 6 to move from the second disconnected position to the second communication position. When the second sliding block 6 is in the second communication position, the inlet end of the second air supplement channel 61 is opposite to and communicates with the second air supplement communication port 432, and the outlet end of the second air supplement channel 61 is opposite to and communicates with the second compression cavity communication port 431. When the second sliding block 6 is in the second disconnected position, the second groove wall 430 covers the inlet end of the second air supplement channel 61.

[0067] During the operation of the compressor, because the eccentric directions of the upper eccentric part 231 and the lower eccentric part 232 of the crankshaft 23 are opposite, the pressures of the first compression cavity 211 and the second compression cavity 221 are not the same at the same time. The pressure change of the compression cavity at the same time is shown in FIG. 3. Figure 16 The figure is the change of the R410a refrigerant when the suction pressure is 0.997 MPa and the discharge pressure is 3.39 MPa.

[0068] Referring to FIG. 4, Figure 17 When the first compression cavity 211 is a high-pressure cavity and the second compression cavity 221 is a low-pressure cavity, the air supplement and enthalpy increase assembly 3 is in the first state. The high-pressure gas in the high-pressure cavity enters the first sliding groove 42 through the first compression cavity communication port 421, and drives the first sliding block 5 to move to the first disconnected position. At this time, the first groove wall 420 covers the inlet end of the first air supplement channel 51, the first compression cavity communication port 421 and the first air supplement communication port 422 are not communicated, the first elastic reset member 7 is in the compressed state, and at the same time, the second sliding block 6 is kept in the second communication position under the action of the elastic restoring force of the second elastic reset member 8. The second compression cavity communication port 431 and the second air supplement communication port 432 are communicated, and the gas supplemented from the air supplement port 41 passes through the second air supplement communication port 432 and enters the second compression cavity 221 as a low-pressure cavity from the second compression cavity communication port 431.

[0069] Referring to FIG. 4, Figure 18When the first compression cavity 211 is a low-pressure cavity and the second compression cavity 221 is a high-pressure cavity, the air supplementing and enthalpy increasing assembly 3 is in the second state, the first slider 5 moves to the first communication position under the action of the first elastic reset member 7, the second slider 6 moves to the second disconnection position under the action of the high-pressure gas, the second groove wall 430 covers the inlet end of the second air supplementing channel 61, the second compression cavity communication port 431 and the second air supplementing communication port 432 are not communicated, the second elastic reset member 8 is in the compressed state, and the gas supplemented from the air supplementing port 41 passes through the first air supplementing communication port 422 and enters the first compression cavity 211 as a low-pressure cavity from the first compression cavity communication port 421.

[0070] As can be seen from the above, the slider of the present application moves under the action of the pressure difference between the two compression cavities and the elastic reset member, controls the connection of the low-pressure cavity and the air supplementing channel, ensures that air is always supplemented to the side of the compression cavity with low pressure, can realize continuous air supplementing and enthalpy increasing on the low-pressure side, and since the present application supplements air to the low-pressure side channel according to the pressure difference, no matter which compression cavity is supplemented with air, the air supplementing channel on the high-pressure side will always be closed with the movement of the slider, which can effectively prevent the backflow of the refrigerant. Meanwhile, the slider and the elastic reset member of the air supplementing and enthalpy increasing assembly are both located in the base, do not occupy extra space in the pump body, are compact in structure, effectively improve the volumetric efficiency of the enthalpy increasing air supplementing compressor, greatly improve the energy efficiency of the compressor, and can improve the operating range of the compressor without being affected by the working conditions. Therefore, the air supplementing and enthalpy increasing assembly of the present application can solve the shortcomings of the two existing air supplementing structures, can provide the maximum air supplementing amount to the compressor without being affected by the working conditions, can greatly improve the volumetric efficiency of the compressor under the existing air supplementing and enthalpy increasing technology, and can solve the backflow problem occurring in the air supplementing process.

[0071] In addition, two air supplement openings can be formed in the base, one of which is in communication with the first air supplement communication opening, and the other is in communication with the second air supplement communication opening. The base can comprise a first base part and a second base part, the first base part is located on the upper air cylinder and is integrally formed with the upper air cylinder, and the second base part is located on the lower air cylinder and is integrally formed with the lower air cylinder. At this time, the first sliding groove is located on the first base part, and the second sliding groove is located on the second base part. The upper air cylinder and the lower air cylinder are respectively provided with one air supplement opening. The air supplement opening of the upper air cylinder is in communication with the first air supplement communication opening, and the air supplement opening of the lower air cylinder is in communication with the second air supplement communication opening. Alternatively, the first base part is located on the upper flange and is integrally formed with the upper flange, and the second base part is located on the lower flange and is integrally formed with the lower flange. The upper flange and the lower flange are respectively provided with one air supplement opening. The air supplement opening of the upper flange is in communication with the first air supplement communication opening, and the air supplement opening of the lower flange is in communication with the second air supplement communication opening. The positions of the sliding grooves on the pump body partition plate, the upper air cylinder, the lower air cylinder, the upper flange or the lower flange, and the opening direction of the sliding grooves can be changed as needed. The shapes and sizes of the sliding blocks and the sliding grooves can be changed as needed. The positions of the compression cavity communication openings and the air supplement communication openings on the groove walls of the sliding grooves, the shapes and sizes of the two, etc. can also be changed as needed. When the two ends of the sliding block in the sliding direction are not at the same level, a spring or other support member can be provided at one end to offset the gravity or other forces of the sliding block. The above changes can also achieve the purpose of the present application.

[0072] Finally, it should be emphasized that the above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bleed air augmenter assembly characterized by, The base, the first slider, the second slider, the first elastic reset member and the second elastic reset member are provided, The base is provided with a first sliding groove and a second sliding groove, the first slider is in sliding cooperation with the first sliding groove, and the second slider is in sliding cooperation with the second sliding groove; The groove wall of the first sliding groove is provided with a first compression cavity communication port and a first air supplement communication port, and the groove wall of the second sliding groove is provided with a second compression cavity communication port and a second air supplement communication port; In the first state, the first slider is forced to move to a first disconnected position, the first compression cavity communication port and the first air supplement communication port are not communicated, the second elastic reset member drives the second slider to move to a second communication position, and the second compression cavity communication port and the second air supplement communication port are communicated. In the second state, the first elastic reset member drives the first slider to move to a first communication position, the first compression cavity communication port and the first air supplement communication port are communicated, the second slider is forced to move to a second disconnected position, and the second compression cavity communication port and the second air supplement communication port are not communicated.

2. The air supplement and enthalpy increasing assembly according to claim 1, wherein: The first slider is provided with a first air supplement channel, in the second state, the first compression cavity communication port and the first air supplement communication port are communicated through the first air supplement channel; and / or The second slider is provided with a second air supplement channel, in the first state, the second compression cavity communication port and the second air supplement communication port are communicated through the second air supplement channel.

3. The air supplement and enthalpy increasing assembly according to claim 2, wherein: The first air supplement communication port is located on a first groove wall of the first sliding groove, the first groove wall is in sliding cooperation with the first slider, in the first state, the first groove wall covers an inlet end of the first air supplement channel; And / or The second air supplement communication port is located on a second groove wall of the second sliding groove, the second groove wall is in sliding cooperation with the second slider, in the second state, the second groove wall covers an inlet end of the second air supplement channel.

4. The air supplement and enthalpy increasing assembly according to any one of claims 1 to 3, wherein: Along the sliding direction of the first slider, the first compression cavity communication port and the first elastic reset member are respectively arranged on opposite sides of the first slider; and / or Along the sliding direction of the second slider, the second compression cavity communication port and the second elastic reset member are respectively arranged on opposite sides of the second slider.

5. The air supplement and enthalpy increasing assembly according to any one of claims 1 to 3, wherein: The axial direction of the base is parallel to the vertical direction; The first sliding groove is recessed downward from the upper surface of the base, and the first sliding groove extends along the radial direction or the chordal direction of the base; and / or The second sliding groove is recessed downward from the upper surface of the base, and the second sliding groove extends along the radial direction or the chordal direction of the base.

6. The air supplement and enthalpy increasing assembly according to any one of claims 1 to 3, wherein: The bottom wall of the first sliding groove and the bottom wall of the second sliding groove are both parallel to the horizontal plane.

7. The air supplementing and enthalpy increasing assembly according to any one of claims 1 to 3, characterized in that: the first sliding groove and the second sliding groove are parallel and close to each other.

8. The air supplementing and enthalpy increasing assembly according to any one of claims 1 to 3, characterized in that: a gas supplementing opening is formed on the base, and the first gas supplementing communication opening and the second gas supplementing communication opening are in communication with the gas supplementing opening; or two gas supplementing openings are formed on the base, one of the gas supplementing openings is in communication with the first gas supplementing communication opening, and the other of the gas supplementing openings is in communication with the second gas supplementing communication opening.

9. The air supplementing and enthalpy increasing assembly according to any one of claims 1 to 3, characterized in that: the base is arranged on a pump body partition plate and is integrally formed with the pump body partition plate.

10. A pump body assembly characterized by, the compressor comprises a first compression cavity, a second compression cavity, and the air supplementing and enthalpy increasing assembly according to any one of claims 1 to 7; the first compression cavity communication opening is in communication with the first compression cavity, and the second compression cavity communication opening is in communication with the second compression cavity.

11. The pump body assembly according to claim 10, characterized in that: the pump body assembly comprises an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder are arranged along a vertical direction, the first compression cavity is located in the upper cylinder, and the second compression cavity is located in the lower cylinder; the base comprises a first base portion and a second base portion, the first sliding groove is located on the first base portion, and the second sliding groove is located on the second base portion.

12. The pump body assembly according to claim 11, characterized in that: the first base portion is located on the upper cylinder and is integrally formed with the upper cylinder, the second base portion is located on the lower cylinder and is integrally formed with the lower cylinder, the upper cylinder and the lower cylinder are respectively provided with a gas supplementing opening, the gas supplementing opening of the upper cylinder is in communication with the first gas supplementing communication opening, and the gas supplementing opening of the lower cylinder is in communication with the second gas supplementing communication opening.

13. The pump body assembly according to claim 11, characterized in that: the pump body assembly comprises an upper flange and a lower flange, the upper flange is arranged above the upper cylinder, and the lower flange is arranged below the lower cylinder; the first base portion is located on the upper flange and is integrally formed with the upper flange, the second base portion is located on the lower flange and is integrally formed with the lower flange, the upper flange and the lower flange are respectively provided with a gas supplementing opening, the gas supplementing opening of the upper flange is in communication with the first gas supplementing communication opening, and the gas supplementing opening of the lower flange is in communication with the second gas supplementing communication opening.

14. Compressor, characterized in that the compressor comprises the pump body assembly according to any one of claims 10 to 13.

15. A refrigeration appliance characterised in that, the compressor comprises the compressor according to claim 14.

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