Pump body assembly for a compressor and compressor

Abstract

The application relates to the technical field of refrigeration equipment, and discloses a pump body assembly for a compressor, which comprises a crankshaft, a first cylinder, a second cylinder and an intermediate partition plate. The crankshaft extends to an oil pool at the bottom of a compressor shell, and the crankshaft is provided with a first oil passage channel communicated with the oil pool. The first cylinder is provided with a first suction port. The second cylinder is provided with a second suction port. The intermediate partition plate is arranged between the first cylinder and the second cylinder, and the intermediate partition plate is provided with a second oil passage channel. The first oil passage channel and the second oil passage channel are connected to form an internal oil circulation channel of the pump body assembly. By utilizing the pressure difference inside the compressor shell and under the action of a first throttle valve and a second throttle valve, the oil at the bottom of the compressor shell is stably guided to the first suction port and the second suction port, and then flows to other moving parts of the pump body assembly, so that the reliability lubrication of the moving parts is ensured, and the reliability of the compressor is enhanced. The application further discloses a compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, for example to a pump body assembly for a compressor and a compressor. BACKGROUND

[0002] At present, during the operation of the compressor, the moving parts of the pump body assembly, such as the rollers and the sliding vanes, are mainly lubricated by oil entrained in the suction to ensure the normal movement of the moving parts such as the rollers and the sliding vanes. When the compressor is operated at a low suction volume or a low temperature, the solubility of the oil and the refrigerant in the compressor is low, and the amount of oil entrained in the suction is sharply reduced, which can easily lead to the wear of the rollers and the sliding vanes due to lack of lubrication, thereby affecting the reliability of the compressor. In the related art, an external circulation flow path composed of an oil-gas separator, an oil reservoir and a pressure reducing valve and the like is additionally added outside the compressor to return the oil discharged from the discharge port of the compressor to the inside of the compressor from the outside of the compressor, so as to ensure the lubrication of the moving parts inside the compressor.

[0003] In the implementation process of the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0004] In the related art, the oil circulation flow path is added outside the compressor, and the oil storage capacity of the oil reservoir depends on the oil separation efficiency of the oil-gas separator. In the case of low oil separation efficiency, the oil storage capacity of the oil reservoir can be small, and the reliable lubrication of the moving parts of the pump body assembly cannot be ensured, thereby affecting the reliability of the compressor.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an overall description of the application, nor is it intended to identify key / important elements or delineate the scope of the embodiments, but as a prelude to the detailed description below.

[0007] The embodiment of the present disclosure provides a pump body assembly for a compressor and the compressor, the pump body assembly for the compressor comprising a crankshaft, a first cylinder, a second cylinder and an intermediate partition plate, the crankshaft being provided with a first oil passage communicating with an oil pool at the bottom of a compressor shell, the intermediate partition plate being provided with a second oil passage, the first oil passage and the second oil passage being communicated to form an internal oil circulation passage of the pump body assembly, a first throttle valve being arranged at the communication position between the second end of the second oil passage and the first suction port, and a second throttle valve being arranged at the communication position between the second end of the second oil passage and the second suction port, so that the oil in the oil pool at the bottom of the compressor shell is stably guided to the first suction port and the second suction port and then flows to other moving parts of the pump body assembly, the reliability of the moving parts of the pump body assembly is ensured, and the reliability of the compressor is enhanced.

[0008] In some embodiments, the pump body assembly for the compressor comprises a crankshaft, a first cylinder, a second cylinder and an intermediate partition plate. The crankshaft extends to an oil pool at the bottom of a compressor shell, and the crankshaft is provided with a first oil passage communicating with the oil pool. The first cylinder is sleeved on the crankshaft, and the first cylinder is provided with a first suction port. The second cylinder is sleeved on the crankshaft, and the second cylinder is provided with a second suction port. The intermediate partition plate is sleeved on the crankshaft, and the intermediate partition plate is arranged between the first cylinder and the second cylinder. The intermediate partition plate is provided with a second oil passage, and the first end of the second oil passage is communicated with the first oil passage, and the second end of the second oil passage is communicated with the first suction port and the second suction port. In some embodiments, a first throttle valve is arranged at the communication position between the second end of the second oil passage and the first suction port, and / or a second throttle valve is arranged at the communication position between the second end of the second oil passage and the second suction port.

[0009] In some embodiments, when the first throttle valve is arranged at the communication position between the second end of the second oil passage and the first suction port, the first cylinder is provided with a first cylinder communication hole, the intermediate partition plate is provided with a partition plate communication hole, the first end of the first cylinder communication hole is communicated with the first suction port, the second end of the first cylinder communication hole is communicated with the partition plate communication hole, the partition plate communication hole is communicated with the first oil passage, the first cylinder communication hole and the partition plate communication hole form a first throttle valve cavity, and the first throttle valve is arranged in the first throttle valve cavity.

[0010] In some embodiments, when the second throttle valve is arranged at the communication position between the second end of the second oil passage and the second suction port, the second cylinder is provided with a second cylinder communication hole, the intermediate partition plate is provided with a partition plate communication hole, the first end of the second cylinder communication hole is communicated with the second suction port, the second end of the second cylinder communication hole is communicated with the partition plate communication hole, the partition plate communication hole is communicated with the first oil passage, the second cylinder communication hole and the partition plate communication hole form a second throttle valve cavity, and the second throttle valve is arranged in the second throttle valve cavity.

[0011] In some optional embodiments, the first cylinder communication hole comprises a first throttling section and a first communication section, a first end of the first communication section is communicated with the first air inlet, a second end of the first communication section is communicated with a first end of the first throttling section, and a second end of the first throttling section is communicated with the partition plate communication hole to form a first throttling valve cavity. The first throttling valve comprises a first piston head and a first elastic member, the first piston head comprises a first throttling part and a first flow guiding part, the first flow guiding part is provided with a first flow guiding hole, a first end of the first flow guiding hole is communicated with a first end of the partition plate communication hole, and a second end of the first flow guiding hole is communicated with the first cylinder communication hole. The first throttling part is arranged in the first throttling section, the first flow guiding part is partially arranged in the partition plate communication hole, the first flow guiding hole is at least partially located outside the partition plate communication hole, and the width of the first throttling section is greater than the width of the first throttling part.

[0012] In some optional embodiments, the second cylinder communication hole comprises a second throttling section and a second communication section, a first end of the second communication section is communicated with the second air inlet, a second end of the second communication section is communicated with a first end of the second throttling section, and a second end of the second throttling section is communicated with the partition plate communication hole to form a second throttling valve cavity. The second throttling valve comprises a second piston head and a second elastic member, the second piston head comprises a second throttling part and a second flow guiding part, the second flow guiding part is provided with a second flow guiding hole, a first end of the second flow guiding hole is communicated with a first end of the partition plate communication hole, and a second end of the second flow guiding hole is communicated with the second cylinder communication hole. The second throttling part is arranged in the second throttling section, the second flow guiding part is partially arranged in the partition plate communication hole, the second flow guiding hole is at least partially located outside the partition plate communication hole, and the width of the second throttling section is greater than the width of the second throttling part.

[0013] In some optional embodiments, the absolute value of the difference between the width of the first throttling section and the width of the first throttling part is greater than or equal to 10 μm and less than or equal to 200 μm.

[0014] In some optional embodiments, the intermediate partition plate is further provided with a partition plate inner hole. A first end of the partition plate inner hole is communicated with the partition plate communication hole to form a second oil passage, a second end of the partition plate inner hole is communicated with the first oil passage, a first end of the partition plate communication hole is communicated with the first air inlet, and a second end of the partition plate communication hole is communicated with the second air inlet.

[0015] In some optional embodiments, the partition plate inner hole comprises a pressure stabilizing passage, a pressure reducing valve cavity and a pressure leading passage. A first end of the pressure stabilizing passage is communicated with the partition plate communication hole, a second end of the pressure stabilizing passage is communicated with the pressure reducing valve cavity, a first end of the pressure leading passage is connected to the pressure reducing valve cavity, a second end of the pressure leading passage is communicated with the first oil passage, and a pressure reducing valve is arranged in the pressure reducing valve cavity.

[0016] In some optional embodiments, the crankshaft comprises a shaft body and a first eccentric portion and a second eccentric portion arranged on the shaft body. The pump body assembly further comprises a first roller and a second roller, the first roller and the second roller being sleeved on the outside of the first eccentric portion and the second eccentric portion respectively. The first cylinder, the first roller, the second cylinder, the second roller and the intermediate partition plate enclose an oil introduction and storage cavity, and the second end of the pressure introduction channel is communicated with the oil introduction and storage cavity, and the oil introduction and storage cavity is communicated with the first oil passage.

[0017] In some optional embodiments, the crankshaft comprises a crankshaft inner hole and a crankshaft communication hole arranged on the shaft body. The first end of the crankshaft inner hole is communicated with the crankshaft communication hole to form the first oil passage, and the second end is communicated with the oil pool at the bottom of the compressor shell, and the crankshaft communication hole is communicated with the oil introduction and storage cavity.

[0018] In some optional embodiments, the pump body assembly further comprises an oil guide. The oil guide is arranged on the crankshaft and is used for guiding the oil in the oil pool at the bottom of the compressor shell to the first oil passage.

[0019] In some embodiments, the compressor comprises the above pump body assembly for the compressor.

[0020] The pump body assembly for the compressor and the compressor provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] The pump body assembly for the compressor provided by the embodiments of the present disclosure comprises a crankshaft, a first cylinder, a second cylinder and an intermediate partition plate. The crankshaft extends to an oil pool at the bottom of a compressor shell, and the crankshaft is provided with a first oil passage channel which is communicated with the oil pool and is used to guide the oil in the oil pool at the bottom of the compressor shell to the moving parts of the pump body assembly through the first oil passage channel. The first cylinder is sleeved on the crankshaft, and the first cylinder is provided with a first suction port. The second cylinder is sleeved on the crankshaft, and the second cylinder is provided with a second suction port. The intermediate partition plate is sleeved on the crankshaft, and the intermediate partition plate is arranged between the first cylinder and the second cylinder, and the two end faces of the intermediate partition plate are connected with the first cylinder and the second cylinder respectively. The intermediate partition plate is provided with a second oil passage channel, and the first end of the second oil passage channel is communicated with the first oil passage channel, and the second end of the second oil passage channel is communicated with the first suction port and the second suction port. In this way, the first oil passage channel, the second oil passage channel and the first suction port and the second suction port are communicated to form an internal oil passage circulation channel of the pump body assembly, and the oil in the oil pool at the bottom of the compressor shell is guided to the first suction port and the second suction port by using the pressure difference inside the compressor shell. Further, the first throttle valve is arranged at the communication position between the second end of the second oil passage channel and the first suction port, and the second throttle valve is arranged at the communication position between the second end of the second oil passage channel and the second suction port, so that the oil in the oil pool at the bottom of the compressor shell can be stably guided to the first suction port and the second suction port, and then flows to other moving parts of the pump body assembly, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly and enhancing the reliability of the compressor.

[0022] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and are not intended to be limiting of the embodiments, in which like reference numerals refer to like elements in the drawings and in which:

[0024] Figure 1 is a structural schematic diagram of a compressor provided by the embodiments of the present disclosure;

[0025] Figure 2 is Figure 1 is a partial enlarged schematic diagram of the X area, in which the pressure reducing valve is in the first state;

[0026] Figure 3 is a structural schematic diagram of a first cylinder in a pump body assembly for a compressor provided by the embodiments of the present disclosure;

[0027] Figure 4 is a structural schematic diagram of a second cylinder in a pump body assembly for a compressor provided by the embodiments of the present disclosure;

[0028] Figure 5 is a structural schematic view of an intermediate partition plate in a pump body assembly of a compressor provided by an embodiment of the present disclosure;

[0029] Figure 6 is Figure 2 is a partial enlarged schematic view of a Y region in the intermediate partition plate;

[0030] Figure 7 is Figure 1 is another partial enlarged schematic view of an X region in the intermediate partition plate, in which a pressure reducing valve is in a second state;

[0031] Figure 8 is a structural schematic view of a crankshaft in a pump body assembly of a compressor provided by an embodiment of the present disclosure;

[0032] Figure 9 is a structural schematic view of a first piston head of a first throttle valve in a pump body assembly of a compressor provided by an embodiment of the present disclosure.

[0033] Reference signs:

[0034] 10: crankshaft; 11: rod body; 111: crankshaft inner hole; 112: crankshaft communication hole; 12: first eccentric part; 13: second eccentric part; 14: oil guide;

[0035] 20: first cylinder; 21: first suction port; 22: first cylinder communication hole; 221: first throttling section; 222: first communication section;

[0036] 30: second cylinder; 31: second suction port; 32: second cylinder communication hole; 321: second throttling section; 322: second communication section;

[0037] 40: intermediate partition plate; 411: pressure stabilizing passage; 412: pressure reducing valve cavity; 413: pressure leading passage; 42: partition plate communication hole;

[0038] 51: first throttle valve; 511: first piston head; 5111: first throttling part; 5112: first flow guiding part; 51121: first flow guiding hole; 512: first elastic member;

[0039] 52: second throttle valve; 521: second piston head; 5211: second throttling part; 5212: second flow guiding part; 52121: second flow guiding hole; 522: second elastic member;

[0040] 61: first roller; 62: second roller;

[0041] 70: pressure reducing valve; 71: plugging member; 72: third elastic member;

[0042] 80: oil introduction and storage cavity

[0043] 91: compressor housing; 92: oil sump. DETAILED DESCRIPTION

[0044] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0045] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances in order to describe the embodiments of the present disclosure. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0046] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0047] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above-mentioned terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0048] Unless otherwise specified, the term "a plurality of" means two or more.

[0049] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B represents: A or B.

[0050] The term “and / or” is a descriptive term that describes a relationship between objects. For example, A and / or B means: A or B, or A and B.

[0051] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0052] Currently, during the operation of the compressor, the moving parts of the pump body assembly, such as the rollers and the sliding vane, are mainly lubricated by oil entrained in the suction to ensure the normal movement of the moving parts such as the rollers and the sliding vane. When the compressor is operated at a low suction volume or a low temperature, the solubility of the oil and the refrigerant in the compressor is low, and the amount of oil entrained in the suction is sharply reduced, which can easily cause the rollers and the sliding vane to be lubricated with insufficient oil and cause wear, thereby affecting the reliability of the compressor. In the related art, an external circulation flow path composed of an oil-gas separator, an oil reservoir, and a pressure reducing valve is additionally provided outside the compressor to return the oil discharged from the exhaust port of the compressor to the inside of the compressor from the outside of the compressor, thereby ensuring the lubrication of the moving parts inside the compressor. In the related art, the external circulation flow path of the oil is provided outside the compressor, and the oil storage capacity of the oil reservoir depends on the oil separation efficiency of the oil-gas separator. In the case of low oil separation efficiency, the oil storage capacity of the oil reservoir can be small, and the reliable lubrication of the moving parts of the pump body assembly cannot be ensured, thereby affecting the reliability of the compressor.

[0053] The present disclosure provides a pump body assembly for a compressor and a compressor. The pump body assembly for a compressor includes a crankshaft 10, a first cylinder 20, a second cylinder 30, and an intermediate partition plate 40. A first oil passage is provided on the crankshaft 10 and communicates with an oil pool 92 at the bottom of a compressor housing 91. The intermediate partition plate 40 is provided with a second oil passage, so that the first oil passage and the second oil passage are in communication to form an internal oil circulation passage of the pump body assembly. A first throttle valve 51 is provided at the communication between the second end of the second oil passage and the first suction port 21, and a second throttle valve 52 is provided at the communication between the second end of the second oil passage and the second suction port 31, to stably guide the oil in the oil pool 92 at the bottom of the compressor housing 91 to the first suction port 21 and the second suction port 31, and then to other moving parts of the pump body assembly, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly and enhancing the reliability of the compressor.

[0054] In combination with Figures 1 to 8As shown, the pump body assembly for the compressor provided by the embodiment of the present disclosure comprises a crankshaft 10, a first cylinder 20, a second cylinder 30 and an intermediate partition plate 40. The crankshaft 10 extends to the oil pool 92 at the bottom of the compressor housing 91, and the crankshaft 10 is provided with a first oil passage, which is communicated with the oil pool 92. The first cylinder 20 is sleeved on the crankshaft 10, and the first cylinder 20 is provided with a first suction port 21. The second cylinder 30 is sleeved on the crankshaft 10, and the second cylinder 30 is provided with a second suction port 31. The intermediate partition plate 40 is sleeved on the crankshaft 10, and the intermediate partition plate 40 is arranged between the first cylinder 20 and the second cylinder 30. The intermediate partition plate 40 is provided with a second oil passage, and the first end of the second oil passage is communicated with the first oil passage, and the second end is communicated with the first suction port 21 and the second suction port 31. Wherein, the first throttling valve 51 is arranged at the communication position between the second end of the second oil passage and the first suction port 21, and / or the second throttling valve 52 is arranged at the communication position between the second end of the second oil passage and the second suction port 31.

[0055] The pump body assembly for the compressor provided by the embodiment of the present disclosure comprises a crankshaft 10, a first cylinder 20, a second cylinder 30 and an intermediate partition plate 40. The crankshaft 10 extends to the oil pool 92 at the bottom of the compressor housing 91, and the crankshaft 10 is provided with a first oil passage, which is communicated with the oil pool 92, for draining the oil in the oil pool 92 at the bottom of the compressor housing 91 to the moving parts of the pump body assembly through the first oil passage. The first cylinder 20 is sleeved on the crankshaft 10, and the first cylinder 20 is provided with a first suction port 21. The second cylinder 30 is sleeved on the crankshaft 10, and the second cylinder 30 is provided with a second suction port 31. The intermediate partition plate 40 is sleeved on the crankshaft 10, and the intermediate partition plate 40 is arranged between the first cylinder 20 and the second cylinder 30, and the two end faces of the intermediate partition plate 40 are connected with the first cylinder 20 and the second cylinder 30 respectively. The intermediate partition plate 40 is provided with a second oil passage, and the first end of the second oil passage is communicated with the first oil passage, and the second end is communicated with the first suction port 21 and the second suction port 31. In this way, the first oil passage, the second oil passage and the first suction port 21 and the second suction port 31 are communicated to form an internal oil circulation passage of the pump body assembly, and the oil in the oil pool 92 at the bottom of the compressor housing 91 is drained to the first suction port 21 and the second suction port 31 by utilizing the pressure difference inside the compressor housing 91. Further, by arranging the first throttling valve 51 at the communication position between the second end of the second oil passage and the first suction port 21, and arranging the second throttling valve 52 at the communication position between the second end of the second oil passage and the second suction port 31, the oil in the oil pool 92 at the bottom of the compressor housing 91 can be stably drained to the first suction port 21 and the second suction port 31, and then flows to other moving parts of the pump body assembly, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly and enhancing the reliability of the compressor.

[0056] In some alternative embodiments, a first throttle valve 51 is arranged at the communication between the second end of the second oil passage and the first suction port 21.

[0057] In this way, the first throttle valve 51 is arranged at the communication between the second end of the second oil passage and the first suction port 21, so that the first oil passage and the second oil passage are in communication to form an internal oil circulation passage of the pump body assembly. By utilizing the pressure difference inside the compressor housing 91, the oil in the oil pool 92 at the bottom of the compressor housing 91 can be stably guided to the first suction port 21 due to the action of the first throttle valve 51, preventing the oil in the oil pool 92 at the bottom of the compressor housing 91 from splashing at the first suction port 21 and then flowing to other moving parts of the pump body assembly, thereby ensuring reliable lubrication of the moving parts of the pump body assembly.

[0058] In some alternative embodiments, a second throttle valve 52 is arranged at the communication between the second end of the second oil passage and the second suction port 31.

[0059] In this way, the second throttle valve 52 is arranged at the communication between the second end of the second oil passage and the second suction port 31, so that the first oil passage and the second oil passage are in communication to form an internal oil circulation passage of the pump body assembly. By utilizing the pressure difference inside the compressor housing 91, the oil in the oil pool 92 at the bottom of the compressor housing 91 can be stably guided to the second suction port 31 due to the action of the second throttle valve 52, preventing the oil in the oil pool 92 at the bottom of the compressor housing 91 from splashing at the second suction port 31 and then flowing to other moving parts of the pump body assembly, thereby ensuring reliable lubrication of the moving parts of the pump body assembly.

[0060] In some alternative embodiments, a first throttle valve 51 is arranged at the communication between the second end of the second oil passage and the first suction port 21, and a second throttle valve 52 is arranged at the communication between the second end of the second oil passage and the second suction port 31.

[0061] In this way, the first throttle valve 51 and the second throttle valve 52 are arranged at the communication between the second end of the second oil passage and the first suction port 21 and the second suction port 31, respectively, so that the first oil passage and the second oil passage are in communication to form an internal oil circulation passage of the pump body assembly. By utilizing the pressure difference inside the compressor housing 91, the oil in the oil pool 92 at the bottom of the compressor housing 91 can be stably guided to the first suction port 21 and the second suction port 31 due to the action of the first throttle valve 51 and the second throttle valve 52, preventing the oil in the oil pool 92 at the bottom of the compressor housing 91 from splashing at the first suction port 21 and the second suction port 31 and then flowing to other moving parts of the pump body assembly, thereby ensuring reliable lubrication of the moving parts of the pump body assembly.

[0062] In some alternative embodiments, in the case that the first throttle valve 51 is arranged at the communication between the second end of the second oil passage and the first suction port 21, the first cylinder 20 is provided with a first cylinder communication hole 22, the intermediate partition plate 40 is provided with a partition plate communication hole 42, a first end of the first cylinder communication hole 22 is communicated with the first suction port 21, a second end of the first cylinder communication hole 22 is communicated with a first end of the partition plate communication hole 42, the partition plate communication hole 42 is communicated with the first oil passage, and the first cylinder communication hole 22 and the partition plate communication hole 42 form a first throttle valve cavity, and the first throttle valve 51 is arranged in the first throttle valve cavity.

[0063] In combination with Figure 3 and Figure 5 In the case that the first throttle valve 51 is arranged at the communication between the second end of the second oil passage and the first suction port 21, the first cylinder 20 is provided with a first cylinder communication hole 22, and the intermediate partition plate 40 is provided with a partition plate communication hole 42. By communicating a first end of the first cylinder communication hole 22 with the first suction port 21, communicating a second end of the first cylinder communication hole 22 with a first end of the partition plate communication hole 42, and communicating the partition plate communication hole 42 with the first oil passage, the first cylinder communication hole 22 and the partition plate communication hole 42 are communicated with the first oil passage, so that the oil in the oil pool 92 at the bottom of the compressor housing 91 can be guided to the first suction port 21 through the first oil passage and the partition plate communication hole 42. Further, the first cylinder communication hole 22 and the first end of the partition plate communication hole 42 form a first throttle valve cavity, and the first throttle valve 51 is arranged in the first throttle valve cavity, so that under the action of the first throttle valve 51, the oil in the oil pool 92 at the bottom of the compressor housing 91 can be stably guided to the first suction port 21 through the first oil passage and the partition plate communication hole 42.

[0064] In some alternative embodiments, in the case that the second throttle valve 52 is arranged at the communication between the second end of the second oil passage and the second suction port 31, the second cylinder 30 is provided with a second cylinder communication hole 32, the intermediate partition plate 40 is provided with a partition plate communication hole 42, a first end of the second cylinder communication hole 32 is communicated with the second suction port 31, a second end of the second cylinder communication hole 32 is communicated with a first end of the partition plate communication hole 42, the partition plate communication hole 42 is communicated with the first oil passage, and the second cylinder communication hole 32 and the partition plate communication hole 42 form a second throttle valve cavity, and the second throttle valve 52 is arranged in the second throttle valve cavity.

[0065] In combination with Figure 4 and Figure 5As shown, with a second throttle valve 52 installed at the connection between the second end of the second oil passage and the second intake port 31, the second cylinder 30 is provided with a second cylinder connecting hole 32, and the intermediate partition 40 is provided with a partition connecting hole 42. By connecting the first end of the second cylinder connecting hole 32 to the second intake port 31, and the second end to the second end of the partition connecting hole 42, and connecting the partition connecting hole 42 to the first oil passage, the second cylinder connecting hole 32 and the partition connecting hole 42 are connected to the first oil passage. Thus, the oil in the oil sump 92 at the bottom of the compressor housing 91 can be diverted to the second intake port 31 through the first oil passage and the partition connecting hole 42. Furthermore, the second cylinder connecting hole and the second end of the partition connecting hole 42 form a second throttle valve cavity, and the second throttle valve 52 is set in the second throttle valve cavity. In this way, under the action of the second throttle valve 52, the oil in the oil sump 92 at the bottom of the compressor housing 91 can be stably guided to the second suction port 31 through the first oil passage and the partition connecting hole 42.

[0066] In some optional embodiments, the first cylinder connecting hole 22 includes a first throttling section 221 and a first connecting section 222. The first end of the first connecting section 222 is connected to the first intake port 21, and the second end is connected to the first end of the first throttling section 221. The second end of the first throttling section 221 is connected to the partition connecting hole 42 to form a first throttling valve cavity. The first throttling valve 51 includes a first piston head 511 and a first elastic element 512. The first piston head 511 includes a first throttling portion 5111 and a first guide portion 5112. The first guide portion 5112 is provided with a first guide hole 51121. The first end of the first guide hole 51121 is connected to the partition connecting hole 42, and the second end is connected to the first cylinder connecting hole 22. The first throttling section 5111 is disposed in the first throttling segment 221, the first guide section 5112 is partially disposed in the partition connecting hole 42, and the first guide hole 51121 is at least partially located outside the partition connecting hole 42, and the width of the first throttling segment 221 is greater than the width of the first throttling section 5111.

[0067] Combination Figure 2 , Figure 6 and Figure 9 As shown, the first cylinder connecting hole 22 includes a first throttling section 221 and a first connecting section 222. The first end of the first connecting section 222 is connected to the first intake port 21, and the second end is connected to the first end of the first throttling section 221. The second end of the first throttling section 221 is connected to the first end of the partition connecting hole 42, forming a first throttling valve cavity. The first throttling valve 51 includes a first piston head 511 and a first elastic element 512, with the first elastic element 512 disposed on the first piston head 511. The first piston head 511 includes a first throttling portion 5111 and a first guide portion 5112, as shown... Figure 9As shown, the first flow guide part 5112 is provided with a first flow guide hole 51121, the first flow guide hole 51121 is arranged inside the first flow guide part 5112, a first end of the first flow guide hole 51121 is communicated with the partition plate communication hole 42, and a second end is communicated with the first cylinder communication hole 22, so that the first cylinder communication hole 22 is communicated with the partition plate communication hole 42 through the first flow guide hole 51121. The first throttling part 5111 is arranged in the first throttling section 221, and the first flow guide part 5112 is partially arranged in the partition plate communication hole 42, so that the first throttling valve 51 can be stably installed in the first throttling valve cavity. The first flow guide hole 51121 is at least partially located outside the partition plate communication hole 42, so that the first flow guide hole 51121 can be communicated with the partition plate communication hole 42 and the first cylinder communication hole 22. Further, the width of the first throttling section 221 is greater than the width of the first throttling part 5111, so that the oil flowing from the partition plate communication hole 42 can pass through the annular gap between the first throttling part 5111 and the first throttling section 221, and under the throttling action of the annular gap, that is, under the action of the first throttling valve 51 and the first cylinder communication hole 22, the oil in the oil pool 92 at the bottom of the compressor shell 91 flowing from the first oil passage can stably flow into the first suction port 21, and then flow to other moving parts of the pump body assembly.

[0068] In some optional embodiments, the first flow guide hole 51121 has a T-shaped structure, the transverse flow guide hole of the first flow guide hole 51121 is communicated with the throttling section of the first cylinder communication hole 22 and the longitudinal flow guide hole, and the longitudinal flow guide hole is communicated with the partition plate communication hole 42. Here, the structure of the first flow guide hole 51121 is not limited, and the first flow guide hole 51121 can have a T-shaped structure or a Y-shaped structure.

[0069] For the convenience of understanding, the pressure of the surface of the oil in the oil pool 92 at the bottom of the compressor shell 91 is Pv, the pressure of the oil flowing into the partition plate communication hole 42 is Pw, and the suction pressure of the first suction port 21 is Ps1. According to the annular gap throttling calculation formula, the flow rate of the oil flowing into the first suction port 21 satisfies the following formula:

[0070]

[0071] Wherein, Q1 is the flow rate of the oil flowing into the first suction port 21; η is the viscosity of the oil; L1 is the throttling length of the annular gap between the first throttling part 5111 of the first piston head 511 of the first throttling valve 51 and the first throttling section 221 of the first cylinder communication hole 22; d1 is the width of the first throttling part 5111 of the first piston head 511 of the first throttling valve 51; and d2 is the width of the first throttling section 221 of the first cylinder communication hole 22.

[0072] In some optional embodiments, the absolute value of the difference between the width of the first throttling section 221 and the width of the first throttling part 5111 is greater than or equal to 10 μm and less than or equal to 200 μm.

[0073] In this way, the width of the annular gap formed between the first throttling part 5111 and the first throttling section 221 is half of the absolute value of the difference between the width of the first throttling section 221 and the width of the first throttling part 5111, i.e. the width of the annular gap formed between the first throttling part 5111 and the first throttling section 221 is greater than or equal to 5 μm and less than or equal to 100 μm. In this way, the width of the annular gap formed between the first throttling part 5111 and the first throttling section 221 can make the first throttling valve 51 have a good throttling effect, so that the oil in the oil pool 92 at the bottom of the compressor housing 91 can be better drained to the first suction port 21 of the first cylinder 20. For example, the width of the annular gap formed between the first throttling part 5111 and the first throttling section 221 can be 5 μm, 15 μm, 25 μm, 35 μm, 45 μm, 55 μm, 65 μm, 75 μm, 85 μm, 95 μm or 100 μm.

[0074] It should be noted that during the operation of the compressor, the suction pressure Ps1 of the first suction port 21 of the first cylinder 20 changes with the change of the operating condition of the compressor, and under the throttling and pressure reduction effect of the first throttling valve 51, the pressure of the oil flowing through the first throttling valve 51 is balanced with the pressure of the first suction port 21, so that the oil can flow into the first suction port 21, that is, the pressure of the oil before and after flowing through the first throttling valve 51 satisfies the following formula:

[0075]

[0076] Wherein, L2 is the pre-compression amount of the first elastic member 512; K1 is the elastic coefficient of the first elastic member 512.

[0077] Here, during the operation of the compressor, the suction pressure Ps1 of the first suction port 21 of the first cylinder 20 varies with the change of the operating condition of the compressor. When the suction pressure Ps of the first suction port 21 increases with the operating condition of the compressor, under the action of the first throttle valve 51, the first elastic member 512 of the first throttle valve 51 will push the first piston head 511 to move towards the direction of the partition communication hole 42, thereby reducing the pre-tightening compression amount L2 of the first elastic member 512 and reducing the throttle length L1 of the annular gap, reducing the flow resistance of the oil, so that the pressure of the oil throttled by the first throttle valve 51 is balanced with the suction pressure Ps1 of the first suction port 21, thereby allowing the oil to flow into the first suction port 21. When the suction pressure Ps1 of the first suction port 21 decreases with the operating condition of the compressor, under the action of the first throttle valve 51, the oil flowing through the first throttle valve 51 will push the first piston head 511 to move towards the direction of the first suction port 21, thereby increasing the pre-tightening compression amount L2 of the first elastic member 512 and increasing the throttle length L1 of the annular gap, increasing the flow resistance of the oil, so that the pressure of the oil throttled by the first throttle valve 51 is balanced with the suction pressure Ps1 of the first suction port 21, thereby allowing the oil to flow into the first suction port 21.

[0078] In some optional embodiments, the second cylinder communication hole 32 comprises a second throttling section 321 and a second communication section 322, the first end of the second communication section 322 is communicated with the second suction port 31, the second end of the second communication section 322 is communicated with the first end of the second throttling section 321, and the second end of the second throttling section 321 is communicated with the partition communication hole 42 to form a second throttle valve cavity. The second throttle valve 52 comprises a second piston head 521 and a second elastic member 522, the second piston head 521 comprises a second throttling part 5211 and a second flow guide part 5212, the second flow guide part 5212 is provided with a second flow guide hole 52121, the first end of the second flow guide hole 52121 is communicated with the first end of the partition communication hole 42, and the second end of the second flow guide hole 52121 is communicated with the second cylinder communication hole 32. Wherein, the second throttling part 5211 is arranged in the second throttling section 321, the second flow guide part 5212 is partially arranged in the second end of the partition communication hole 42, and the second flow guide hole 52121 is at least partially located outside the second end of the partition communication hole 42, and the width of the second throttling section 321 is greater than the width of the second throttling part 5211.

[0079] In this way, the second cylinder communication hole 32 comprises a second throttling section 321 and a second communication section 322, the first end of the second communication section 322 is communicated with the second suction port 31, the second end of the second communication section 322 is communicated with the first end of the second throttling section 321, and the second end of the second throttling section 321 is communicated with the second end of the partition communication hole 42 to form a second throttling valve cavity. The second throttling valve 52 comprises a second piston head 521 and a second elastic member 522, and the second elastic member 522 is arranged on the second piston head 521. The second piston head 521 comprises a second throttling section 5211 and a second flow guide section 5212, the second flow guide section 5212 is provided with a second flow guide hole 52121, the second flow guide hole 52121 is arranged in the second flow guide section 5212, the first end of the second flow guide hole 52121 is communicated with the partition communication hole 42, and the second end of the second flow guide hole 52121 is communicated with the second cylinder communication hole 32, so that the second cylinder communication hole 32 is communicated with the partition communication hole 42 through the second flow guide hole 52121. The second throttling section 5211 is arranged in the second throttling section 321, and the second flow guide section 5212 is partially arranged in the partition communication hole 42, so that the second throttling valve 52 can be stably arranged in the second throttling valve cavity. The second flow guide hole 52121 is at least partially arranged outside the partition communication hole 42, so that the second flow guide hole 52121 can be communicated with the partition communication hole 42 and the second cylinder communication hole 32. Further, the width of the second throttling section 321 is greater than the width of the second throttling section 5211, so that the oil flowing from the partition communication hole 42 can flow through the annular gap between the second throttling section 5211 and the second throttling section 321, and under the throttling effect of the annular gap, that is, under the effect of the second throttling valve 52 and the second cylinder communication hole 32, the oil in the oil pool 92 at the bottom of the compressor housing 91 flowing from the second oil passage can stably flow into the second suction port 31, and then flow to other moving parts of the pump body assembly.

[0080] In some optional embodiments, the second flow guide hole 52121 has a T-shaped structure, the transverse flow guide hole of the second flow guide hole 52121 of the T-shaped structure is communicated with the throttling section of the second cylinder communication hole 32, and the longitudinal flow guide hole is communicated with the partition communication hole 42. Here, the structure of the second flow guide hole 52121 is not limited, and the second flow guide hole 52121 can have a T-shaped structure or a Y-shaped structure.

[0081] When the suction pressure of the second suction port is Ps2, the flow rate of the oil flowing into the second suction port 31 satisfies the following formula according to the annular gap throttling calculation formula:

[0082]

[0083] Q2=ηL3d3d4 / 4d4d3L3

[0084] In some optional embodiments, the absolute value of the difference between the width of the second throttling section 321 and the width of the second throttling part 5211 is greater than or equal to 10 μm and less than or equal to 200 μm.

[0085] In this way, the width of the annular gap formed between the second throttling part 5211 and the second throttling section 321 is half of the absolute value of the difference between the width of the second throttling section 321 and the width of the second throttling part 5211, i.e. the width of the annular gap formed between the second throttling part 5211 and the second throttling section 321 is greater than or equal to 5 μm and less than or equal to 100 μm. In this way, the width of the annular gap formed between the second throttling part 5211 and the second throttling section 321 can make the second throttling valve 52 have a good throttling effect, so that the oil in the oil pool 92 at the bottom of the compressor housing 91 can be better drained to the second suction port 31 of the second cylinder 30. For example, the width of the annular gap formed between the second throttling part 5211 and the second throttling section 321 can be 5 μm, 15 μm, 25 μm, 35 μm, 45 μm, 55 μm, 65 μm, 75 μm, 85 μm, 95 μm, 100 μm.

[0086] It should be noted that during the operation of the compressor, the suction pressure Ps2 of the second suction port 31 of the second cylinder 30 changes with the change of the operating condition of the compressor, and under the throttling pressure reduction effect of the second throttling valve 52, the pressure of the oil flowing through the second throttling valve 52 is balanced with the pressure of the second suction port 31, so that the oil can flow into the second suction port 31, that is, the pressure of the oil before and after flowing through the second throttling valve 52 satisfies the following formula:

[0087]

[0088] Wherein, L4 is the pre-compression amount of the second elastic member 512; K2 is the elastic coefficient of the second elastic member 512.

[0089] Here, during the operation of the compressor, the suction pressure Ps2 of the second suction port 31 of the second cylinder 30 changes with the change of the operating condition of the compressor. When the suction pressure Ps of the second suction port 31 increases with the operating condition of the compressor, the second elastic member 522 of the second throttle valve 52 is pushed by the oil flowing through the second throttle valve 52 to move the second piston head 521 in the direction of the partition plate communication hole 42, so that the pre-compression amount L4 of the second elastic member 522 is reduced, the throttling length L3 of the annular gap is reduced, the flow resistance of the oil is reduced, the pressure of the oil throttled by the second throttle valve 52 is balanced with the suction pressure Ps2 of the second suction port 31, and thus the oil can flow into the second suction port 31. When the suction pressure Ps2 of the second suction port 31 decreases with the operating condition of the compressor, the oil flowing through the second throttle valve 52 pushes the second piston head 521 in the direction of the second suction port 31, so that the pre-compression amount L4 of the second elastic member 522 is increased, the throttling length L3 of the annular gap is increased, the flow resistance of the oil is increased, the pressure of the oil throttled by the second throttle valve 52 is balanced with the suction pressure Ps2 of the second suction port 31, and thus the oil can flow into the second suction port 31.

[0090] It should be noted that the structures of the first throttle valve 51 and the second throttle valve 52 can be the same or different, and the first cylinder communication hole 22 and the second cylinder communication hole 32 are respectively arranged to match the first throttle valve 51 and the second throttle valve 52.

[0091] In some optional embodiments, the intermediate partition plate 40 is further provided with a partition plate inner hole. The first end of the partition plate inner hole is communicated with the partition plate communication hole 42 to form a second oil passage, and the second end is communicated with the first oil passage. The first end of the partition plate communication hole 42 is communicated with the first suction port 21, and the second end is communicated with the second suction port 31.

[0092] In this way, by arranging the partition plate inner hole in the intermediate partition plate 40, the first end of the partition plate inner hole is communicated with the partition plate communication hole 42 to form a second oil passage, and the second end is communicated with the first oil passage. The first end of the partition plate communication hole 42 is communicated with the first suction port 21, and the second end is communicated with the second suction port 31, so that the first oil passage, the second oil passage, the first suction port 21 and the second suction port 31 are communicated, the oil in the oil pool 92 at the bottom of the compressor housing 91 is stably guided to the first suction port 21 and the second suction port 31, and then flows to other moving parts of the pump body assembly, so as to ensure the reliable lubrication of the moving parts of the pump body assembly and enhance the reliability of the compressor.

[0093] In some optional embodiments, the inner hole of the partition plate comprises a pressure stabilizing channel 411, a pressure reducing valve cavity 412 and a pressure leading channel 413. The first end of the pressure stabilizing channel 411 is communicated with the partition plate communication hole 42, and the second end is communicated with the pressure reducing valve cavity 412. The first end of the pressure leading channel 413 is connected to the pressure reducing valve cavity 412, and the second end is communicated with the first oil passage. The pressure reducing valve 70 is arranged in the pressure reducing valve cavity 412.

[0094] In combination Figure 2 and Figure 7 As shown in FIG. 11, the inner hole of the partition plate comprises a pressure stabilizing channel 411, a pressure reducing valve cavity 412 and a pressure leading channel 413. The first end of the pressure stabilizing channel 411 is communicated with the partition plate communication hole 42, and the second end is communicated with the pressure reducing valve cavity 412. The first end of the pressure leading channel 413 is connected to the pressure reducing valve cavity 412, and the second end is communicated with the first oil passage. The partition plate communication hole 42 is communicated with the pressure stabilizing channel 411, the pressure reducing valve cavity 412 and the pressure leading channel 413 to form a second oil passage, so that the oil in the oil pool 92 at the bottom of the compressor housing 91 drained from the first oil passage enters the pressure reducing valve cavity 412 through the pressure leading channel 413, then enters the pressure stabilizing channel 411 through the pressure reducing valve cavity 412, and then flows from the pressure stabilizing channel 411 through the partition plate communication hole 42 to be divided into two streams flowing to the first suction port 21 and the second suction port 31. Further, the pressure reducing valve 70 is arranged in the pressure reducing valve cavity 412, so that the oil drained from the first oil passage is subjected to a first pressure reduction by the pressure reducing valve 70, and then enters the pressure stabilizing channel 411 from the pressure reducing valve cavity 412, so that the pressure of the oil entering the partition plate communication hole 42 is more stable.

[0095] In some optional embodiments, the pressure reducing valve 70 comprises a blocking member 71 and a third elastic member 72. The blocking member 71 can be communicated or blocked with the pressure leading channel 413 and the pressure reducing valve cavity 412 under the action of the third elastic member 72.

[0096] It should be noted that, during the operation of the compressor, the pressure of the oil in the oil pool 92 at the bottom of the compressor housing 91 is Pv, that is, the pressure of the oil drained from the first oil passage and the pressure leading channel 413 is Pv. After the pressure reduction of the pressure reducing valve 70, the pressure of the oil drained to the partition plate communication hole 42 is reduced to Pw. That is, the pressure of the oil drained from the first oil passage and the pressure leading channel 413 is Pv, which is greater than the pre-tightening force of the third elastic member 72 of the pressure reducing valve 70. The pressure of the oil moves the blocking member 71 of the pressure reducing valve 70 away from the end of the pressure leading channel 413 communicated with the pressure reducing valve cavity 412, so that the pressure leading channel 413 is communicated with the pressure reducing valve cavity 412. At this time, the third elastic member 72 interacts with the oil to reach a balanced state, that is, the pressure reducing valve 70 changes from the first state shown in FIG. 11 to the second state shown in FIG. 12. Figure 2 Figure 7 ​The second state is shown, so that the pressure of the oil flowing to the partition hole 42 is reduced to Pw.

[0097] Further, during the operation of the compressor, the pressure Pv of the surface of the oil in the oil pool 92 at the bottom of the compressor housing 91 also changes with the working condition. When the pressure Pv of the surface of the oil increases, under the action of the pressure reducing valve 70, the oil pressure pushes the blocking piece 71 to a greater distance away from the end of the pressure introduction channel 413 communicating with the pressure reducing valve cavity 412, and the pre-tightening force of the third elastic piece 72 becomes greater. When the pressure Pv of the surface of the oil decreases, under the action of the pressure reducing valve 70, the oil pressure pushes the blocking piece 71 to a smaller distance away from the end of the pressure introduction channel 413 communicating with the pressure reducing valve cavity 412, and the pre-tightening force of the third elastic piece 72 becomes smaller. That is, under the first pressure reducing action of the pressure reducing valve 70, the pressure of the oil flowing to the partition hole 42 is reduced to Pw, which can make the pressure of the oil entering the partition hole 42 more stable.

[0098] In some optional embodiments, the crankshaft 10 includes a shaft body 11 and a first eccentric portion 12 and a second eccentric portion 13 arranged on the shaft body 11. The pump body assembly further includes a first roller 61 and a second roller 62, and the first roller 61 and the second roller 62 are respectively sleeved on the outer sides of the first eccentric portion 12 and the second eccentric portion 13. The first cylinder 20, the first roller 61, the second cylinder 30, the second roller 62 and the intermediate partition plate 40 enclose an oil introduction and storage cavity 80, and the second end of the pressure introduction channel 413 communicates with the oil introduction and storage cavity 80, and the oil introduction and storage cavity 80 communicates with the first oil passage.

[0099] In combination Figure 1 and 8 As shown, the crankshaft 10 includes a shaft body 11 and a first eccentric portion 12 and a second eccentric portion 13 arranged on the shaft body 11. The pump body assembly further includes a first roller 61 and a second roller 62, and the first roller 61 and the second roller 62 are respectively sleeved on the outer sides of the first eccentric portion 12 and the second eccentric portion 13. Here, the first cylinder 20, the first roller 61, the second cylinder 30, the second roller 62 and the intermediate partition plate 40 enclose an oil introduction and storage cavity 80, and the pressure introduction channel 413 of the partition hole is arranged to communicate with the oil introduction and storage cavity 80, and the oil introduction and storage cavity 80 communicates with the first oil passage. In this way, the oil introduction and storage cavity 80 respectively communicates with the first oil passage and the second oil passage, so that the first oil passage and the second oil passage are communicated. Moreover, the oil in the oil pool 92 at the bottom of the compressor housing 91 flowing from the first oil passage can be stored in the oil introduction and storage cavity 80, and then transported to other moving parts of the pump body assembly through the second oil passage, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly.

[0100] In some alternative embodiments, the crankshaft 10 comprises a crankshaft inner hole 111 and a crankshaft communication hole 112 arranged in the rod body 11. The first end of the crankshaft inner hole 111 is communicated with the crankshaft communication hole 112 to form a first oil passage, the second end is communicated with the oil pool 92 at the bottom of the compressor shell 91, and the crankshaft communication hole 112 is communicated with the oil guiding and storing cavity 80.

[0101] In this way, the crankshaft 10 comprises an axially arranged crankshaft inner hole 111 and a radially arranged crankshaft communication hole 112 arranged in the rod body 11, as shown in Figure 8 Here, the first end of the crankshaft inner hole 111 is communicated with the crankshaft communication hole 112 to form a first oil passage, the second end is communicated with the oil pool 92 at the bottom of the compressor shell 91, and the crankshaft communication hole 112 is communicated with the oil guiding and storing cavity 80, that is, the second oil passage is communicated with the oil pool 92 at the bottom of the compressor shell 91, so as to guide the oil at the bottom of the compressor shell 91 to the oil guiding and storing cavity 80 through the first oil passage, and then to other moving parts of the pump body assembly through the second oil passage.

[0102] In some alternative embodiments, the pump body assembly further comprises an oil guiding member 14. The oil guiding member 14 is arranged in the crankshaft 10, and is used to guide the oil in the oil pool 92 at the bottom of the compressor shell 91 to the first oil passage.

[0103] The pump body assembly for the compressor provided by the embodiments of the present disclosure further comprises an oil guiding member 14 arranged in the crankshaft 10. As shown in Figure 1 The oil guiding member 14 is arranged in the crankshaft inner hole 111, and can more conveniently guide the oil in the oil pool 92 at the bottom of the compressor shell 91 to the first oil passage, and then to the oil guiding and storing cavity 80 through the first oil passage, and then to other moving parts of the pump body assembly through the second oil passage.

[0104] In some alternative embodiments, the oil guiding member 14 comprises an oil guiding sheet. The oil guiding sheet has a spiral structure, and is arranged along the length direction of the crankshaft inner hole 111.

[0105] In some alternative embodiments, the first end of the oil guiding member 14 is located at the second end of the crankshaft inner hole 111, and the second end is located at the crankshaft communication hole 112.

[0106] In this way, the first end of the oil guiding member 14 is arranged at the second end of the crankshaft inner hole 111, and the second end is arranged at the crankshaft communication hole 112, so that the oil guiding member 14 can guide the oil in the oil pool 92 at the bottom of the compressor shell 91 directly to the crankshaft communication hole 112, and then to the oil guiding and storing cavity 80 through the crankshaft communication hole 112, so that the oil in the oil pool 92 at the bottom of the compressor shell 91 is more easily guided to the oil guiding and storing cavity 80, and then to other moving parts of the pump body assembly through the second oil passage.

[0107] The present disclosure also provides a compressor. The compressor comprises the pump body assembly for the compressor.

[0108] It should be noted that during the operation of the compressor, the pressure inside the compressor housing 91, i.e. the pressure of the oil pool 92 at the bottom of the compressor housing 91, is greater than the pressure of the first suction port 21 of the first cylinder 20 and the second suction port 31 of the second cylinder 30. During the operation of the compressor, the oil inside the pump body assembly is divided into the first suction port 21 and the second suction port 31 via the first oil passage, the partition hole 42 of the second oil passage, and the partition hole 42. The oil inside the pump body assembly flows to the first suction port 21 under the pressure-reducing throttling action of the first throttle valve 51, as shown in Figure 6 , Figure 6 The direction of the dashed arrow is the flow direction of the oil through the torus gap. During the rotation of the crankshaft 10, the oil in the oil pool 92 at the bottom of the compressor housing 91 is lifted under the action of the oil guide 14, and the lifted oil is transported along the inner hole 111 of the crankshaft to the communication hole 112 of the crankshaft, and then enters the oil guide storage cavity 80 via the communication hole 112 of the crankshaft. Then from the oil guide storage cavity 80 into the partition hole pressure channel 413, under the first pressure-reducing action of the pressure-reducing valve 70, overcoming the pre-tightening elastic force of the third elastic member 72, the pressure channel 413 is connected with the pressure-reducing valve cavity 412, so that the pressure of the oil entering the pressure stabilizing channel 411 through the pressure-reducing valve cavity 412 is reduced to Pw. Then through the pressure stabilizing channel 411 to the partition hole 42, and divided into the first cylinder communication hole 22 and the second cylinder communication hole 32 through the partition hole 42. Under the action of the first throttle valve 51 and the second throttle, the oil will enter the torus gap formed between the first throttle part 5111 and the first throttle section 221 and the torus gap formed between the second throttle part 5211 and the second throttle section 321 through the first flow guide hole 51121 and the second flow guide hole 52121, respectively, to reduce the pressure, and finally enter the first suction port 21 from the first communication section 222 of the first cylinder 20 and the second suction port 31 from the second communication section 322 of the second cylinder 30, respectively, and then flow to other moving parts of the pump body assembly, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly and increasing the reliability of the compressor.

[0109] The above description and drawings suffice to fully enable one skilled in the art to practice the embodiments of the present disclosure. Other embodiments can include structural and other changes. The embodiments are merely representative of possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be varied. Portions and features of some embodiments can be included in, or substituted for, portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and can be varied in a variety of ways. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A pump body assembly for a compressor, characterized by, The compressor comprises: a crankshaft, an oil pool at the bottom of the compressor shell, the crankshaft being provided with a first oil passage connected to the oil pool; a first cylinder sleeved on the crankshaft, the first cylinder being provided with a first suction port; a second cylinder sleeved on the crankshaft, the second cylinder being provided with a second suction port; an intermediate partition plate sleeved on the crankshaft, the intermediate partition plate being arranged between the first cylinder and the second cylinder, the intermediate partition plate being provided with a second oil passage, the first end of the second oil passage being connected to the first oil passage, and the second end of the second oil passage being connected to the first suction port and the second suction port, wherein a first throttle valve is arranged at the connection between the second end of the second oil passage and the first suction port, the suction pressure of the first suction port of the first cylinder changes with the operating condition of the compressor during the operation of the compressor, the pressure of the oil throttled by the first throttle valve is balanced with the suction pressure of the first suction port, so that the oil can flow into the first suction port; and / or a second throttle valve is arranged at the connection between the second end of the second oil passage and the second suction port, the suction pressure of the second suction port of the second cylinder changes with the operating condition of the compressor during the operation of the compressor, the pressure of the oil throttled by the second throttle valve is balanced with the suction pressure of the second suction port, so that the oil can flow into the second suction port.

2. The assembly according to claim 1, wherein in the case where the first throttle valve is arranged at the connection between the second end of the second oil passage and the first suction port, the first cylinder is provided with a first cylinder communication hole, the intermediate partition plate is provided with a partition plate communication hole, the first end of the first cylinder communication hole is connected to the first suction port, the second end of the first cylinder communication hole is connected to the partition plate communication hole, the partition plate communication hole is connected to the first oil passage, the first cylinder communication hole and the partition plate communication hole form a first throttle valve cavity, and the first throttle valve is arranged in the first throttle valve cavity.

3. The assembly according to claim 1, wherein in the case where the second throttle valve is arranged at the connection between the second end of the second oil passage and the second suction port, the second cylinder is provided with a second cylinder communication hole, the intermediate partition plate is provided with a partition plate communication hole, the first end of the second cylinder communication hole is connected to the second suction port, the second end of the second cylinder communication hole is connected to the partition plate communication hole, the partition plate communication hole is connected to the first oil passage, the second cylinder communication hole and the partition plate communication hole form a second throttle valve cavity, and the second throttle valve is arranged in the second throttle valve cavity.

4. The pump body assembly according to claim 2, wherein the first cylinder communication hole comprises a first throttling section and a first communication section, the first end of the first communication section is connected to the first suction port, the second end of the first communication section is connected to the first end of the first throttling section, and the second end of the first throttling section is connected to the partition plate communication hole to form the first throttle valve cavity; the first throttle valve comprises a first piston head and a first elastic member, the first piston head comprises a first throttling part and a first flow guiding part, the first flow guiding part is provided with a first flow guiding hole, the first end of the first flow guiding hole is connected to the first end of the partition plate communication hole, and the second end of the first flow guiding hole is connected to the first cylinder communication hole. The first throttling part is arranged in the first throttling section, the first flow guide part is partially arranged in the partition plate communication hole, the first flow guide hole is at least partially located outside the partition plate communication hole, and the width of the first throttling section is greater than the width of the first throttling part.

5. The pump body assembly of claim 4, wherein, The intermediate partition plate is further provided with a partition plate inner hole, a first end of the partition plate inner hole is communicated with the partition plate communication hole to form a second oil passage, a second end of the partition plate inner hole is communicated with the first oil passage, a first end of the partition plate communication hole is communicated with the first suction port, and a second end of the partition plate communication hole is communicated with the second suction port.

6. The pump body assembly of claim 5, wherein, The partition plate inner hole comprises a pressure stabilizing passage, a pressure reducing valve cavity, and a pressure leading passage, The first end of the pressure stabilizing passage is communicated with the partition plate communication hole, the second end of the pressure stabilizing passage is communicated with the pressure reducing valve cavity, the first end of the pressure leading passage is connected to the pressure reducing valve cavity, the second end of the pressure leading passage is communicated with the first oil passage, and the pressure reducing valve is arranged in the pressure reducing valve cavity.

7. The pump body assembly of claim 6, wherein, The crankshaft comprises a shaft body, a first eccentric part, and a second eccentric part arranged on the shaft body; The pump body assembly further comprises a first roller and a second roller, the first roller and the second roller are respectively sleeved on the outer sides of the first eccentric part and the second eccentric part, The first cylinder, the first roller, the second cylinder, the second roller, and the intermediate partition plate enclose an oil leading storage cavity, the second end of the pressure leading passage is communicated with the oil leading storage cavity, and the oil leading storage cavity is communicated with the first oil passage.

8. The pump body assembly of claim 7, wherein, The crankshaft comprises a crankshaft inner hole and a crankshaft communication hole arranged on the shaft body, The first end of the crankshaft inner hole is communicated with the crankshaft communication hole to form the first oil passage, the second end of the crankshaft inner hole is communicated with an oil pool at the bottom of the compressor housing, and the crankshaft communication hole is communicated with the oil leading storage cavity.

9. The pump body assembly of any one of claims 1 to 8, wherein, Further comprising: An oil guide member arranged on the crankshaft, for guiding the oil in the oil pool at the bottom of the compressor housing to the first oil passage.

10. A compressor characterized by, A pump body assembly for a compressor as claimed in any one of claims 1 to 9.

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