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, the crankshaft is provided with a first oil passage channel communicated with the oil pool, and 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 provided with a second oil passage channel, 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. The first oil passage channel and the second oil passage channel are communicated to form an internal oil circulation channel of the pump body assembly. A pressure difference in the compressor shell is utilized, a pressure reduction device is arranged in the second oil passage channel, oil in the oil pool is stably drained to the first suction port and the second suction port, and then flows to moving parts of the pump body assembly, so that the reliability of the moving parts is ensured. The application further discloses a compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, for example, relates to a pump body assembly for a compressor and the 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 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 in the compressor and the refrigerant is low, and the amount of oil entrained in the suction is sharply reduced, which can easily cause the moving parts of the pump body assembly to be lubricated by 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.

[0003] In the process of implementing 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 external circulation flow path of the oil is additionally 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, thereby failing to ensure the reliable lubrication of the moving parts of the pump body assembly and 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 have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not a general review, nor is it intended to determine the key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0007] The embodiments of the present disclosure provide a pump body assembly for a compressor and a compressor. The pump body assembly for a compressor comprises a crankshaft, a first cylinder, a second cylinder and an intermediate partition plate. A first oil passage communicating with an oil pool at the bottom of a compressor housing is arranged on the crankshaft. The intermediate partition plate is provided with a second oil passage having a pressure reducing device, and the first oil passage and the second oil passage are connected to form an internal oil circulation passage of the pump body assembly. The oil in the oil pool at the bottom of the compressor housing is stably drained to the moving parts of the pump body assembly by utilizing the pressure difference inside the compressor housing, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly and enhancing the reliability of the compressor.

[0008] In some embodiments, a pump body assembly for a compressor includes a crankshaft, a first cylinder, a second cylinder and an intermediate partition. The crankshaft has an end extending to an oil pool in a bottom of a compressor housing, and the crankshaft is provided with a first oil passage communicating with the oil pool. The first cylinder is sleeved on the crankshaft and provided with a first suction port. The second cylinder is sleeved on the crankshaft and provided with a second suction port. The intermediate partition is sleeved on the crankshaft and arranged between the first cylinder and the second cylinder, and the intermediate partition is provided with a second oil passage, and a first end of the second oil passage communicates with the first oil passage, and a second end of the second oil passage communicates with the first suction port and the second suction port, wherein the second oil passage is provided with a pressure reducing device.

[0009] In some optional embodiments, the pressure reducing device includes a first pressure reducing valve. The first pressure reducing valve is arranged at a position where the second end of the second oil passage communicates with the first suction port.

[0010] In some optional embodiments, the pressure reducing device includes a second pressure reducing valve. The second pressure reducing valve is arranged at a position where the second end of the second oil passage communicates with the second suction port.

[0011] In some optional embodiments, the pressure reducing device includes a first pressure reducing valve and a second pressure reducing valve. The first pressure reducing valve is arranged at a position where the second end of the second oil passage communicates with the first suction port. The second pressure reducing valve is arranged at a position where the second end of the second oil passage communicates with the second suction port.

[0012] In some optional embodiments, in the case where the pressure reducing device includes the first pressure reducing valve, the first cylinder is provided with a first pressure reducing groove and a first throttling micro-hole, and a first end of the first throttling micro-hole communicates with the first suction port. An end surface of the intermediate partition in contact with the first cylinder is provided with a second pressure reducing groove and a second throttling micro-hole communicating with the second pressure reducing groove. The second throttling micro-hole corresponds to a second end of the first throttling micro-hole to form a first throttling micro-channel, the second pressure reducing groove and the first pressure reducing groove form a first pressure reducing valve cavity, the first pressure reducing valve cavity communicates with the second oil passage, and the first pressure reducing valve is arranged in the first pressure reducing valve cavity.

[0013] In some optional embodiments, in the case where the pressure reducing device includes the second pressure reducing valve, the second cylinder is provided with a third pressure reducing groove and a third throttling micro-hole, and a first end of the third throttling micro-hole communicates with the second suction port. An end surface of the intermediate partition in contact with the second cylinder is provided with a fourth pressure reducing groove and a fourth throttling micro-hole communicating with the fourth pressure reducing groove. The fourth throttling micro-hole corresponds to a second end of the third throttling micro-hole to form a second throttling micro-channel, the fourth pressure reducing groove and the third pressure reducing groove form a second pressure reducing valve cavity, the second pressure reducing valve cavity communicates with the second oil passage, and the second pressure reducing valve is arranged in the second pressure reducing valve cavity.

[0014] In some optional embodiments, the intermediate partition plate comprises a radially arranged partition plate inner hole and an axially arranged partition plate communication hole, wherein a first end of the partition plate inner hole is communicated with the partition plate communication hole to form a second oil passage channel, a second end of the partition plate inner hole is communicated with the first oil passage channel, a first end of the partition plate communication hole is communicated with the second pressure reduction groove, and a second end of the partition plate communication hole is communicated with the fourth pressure reduction groove.

[0015] 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 are respectively sleeved on the outer sides of the first eccentric portion and the second eccentric portion. The first cylinder, the first roller, the second cylinder, the second roller and the intermediate partition plate enclose an oil guiding and storing cavity, and the second end of the partition plate inner hole is communicated with the oil guiding and storing cavity, and the oil guiding and storing cavity is communicated with the first oil passage channel.

[0016] In some optional embodiments, the crankshaft comprises an axially arranged crankshaft inner hole and a radially arranged 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 channel, and the second end of the crankshaft inner hole is communicated with the oil pool at the bottom of the compressor shell, and the crankshaft communication hole is communicated with the oil guiding and storing cavity.

[0017] In some optional embodiments, the pump body assembly further comprises an oil guiding member. The oil guiding member is arranged in the crankshaft inner hole and is used for guiding the oil in the oil pool at the bottom of the compressor shell to the first oil passage channel.

[0018] In some optional embodiments, a first end of the oil guiding member is located at the second end of the crankshaft inner hole, and a second end of the oil guiding member is located at the crankshaft communication hole.

[0019] In some embodiments, the compressor comprises the above-mentioned 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. 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. By arranging a pressure reducing device in the second oil passage channel and connecting the first oil passage channel and the second oil passage channel to form an internal oil passage circulation channel of the pump body assembly, 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 by using the pressure difference inside the compressor shell, and then flows to other moving parts of the pump body assembly, so that the reliability lubrication of the moving parts of the pump body assembly is ensured, and the reliability of the compressor is enhanced.

[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 local enlarged schematic diagram of the X area;

[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 diagram of an intermediate partition plate in a pump body assembly for a compressor provided by the embodiments of the present disclosure;

[0029] Figure 6 is a structural schematic diagram of a crankshaft in a pump body assembly for a compressor provided by the embodiments of the present disclosure;

[0030] Figure 7 is Figure 1 is a local enlarged schematic view of the Y region in the middle, and the direction of the dotted arrow is a schematic view of the flow direction of the oil inside the pump body assembly.

[0031] Reference signs:

[0032] 10: crankshaft; 11: rod body; 111: crankshaft inner hole; 112: crankshaft communication hole; 12: first eccentric part; 13: second eccentric part; 14: oil guide;

[0033] 20: first cylinder; 21: first air inlet; 22: first stage pressure reduction groove; 23: first stage throttle micro hole;

[0034] 30: second cylinder; 31: second air inlet; 32: third stage pressure reduction groove; 33: third stage throttle micro hole;

[0035] 40: middle partition plate; 41: partition plate inner hole; 42: partition plate communication hole; 43: second stage pressure reduction groove; 44: second stage throttle micro hole; 45: fourth stage pressure reduction groove; 46: fourth stage throttle micro hole;

[0036] 51: first stage throttle micro channel; 52: second stage throttle micro channel;

[0037] 61: first roller; 62: second roller.

[0038] 71: first pressure reduction valve; 72: second pressure reduction valve;

[0039] 80: oil guiding and storing cavity;

[0040] 91: compressor shell; 92: oil pool. DETAILED DESCRIPTION

[0041] In order to enable a person skilled in the art to have a better understanding of the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below in combination with the drawings, which 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, in order to simplify the drawings, well-known structures and devices can be simplified.

[0042] The terms "first", "second", and the like in the description and in the claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to describe the embodiments of the present disclosure herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0043] 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 the embodiments thereof, 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 part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent 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.

[0044] 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 terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0045] Unless otherwise specified, the term "a plurality of" means two or more.

[0046] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means: A or B.

[0047] The term "and / or" is a description of the association between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0048] 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.

[0049] 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 in the compressor with the refrigerant is low, and the amount of oil entrained in the suction is sharply reduced, which easily leads to the wear of the rollers and the sliding vane due to the lack of lubrication, and affects 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 provided outside the compressor, the oil discharged from the exhaust port of the compressor is returned to the inside of the compressor from the outside of the compressor to ensure the lubrication of the moving parts in the compressor.

[0050] In the related art, the external circulation flow path of the oil is additionally 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 may be small, and thus the reliable lubrication of the moving parts of the pump body assembly cannot be ensured, and the reliability of the compressor is affected.

[0051] The embodiment of the present disclosure provides a pump body assembly for a compressor and a compressor. The pump body assembly for a compressor comprises a crankshaft 10, a first cylinder 20, a second cylinder 30 and an intermediate partition plate 40. A first oil passage is arranged on the crankshaft 10 and communicates with an oil pool 92 at the bottom of a compressor shell 91. The intermediate partition plate 40 is provided with a second oil passage having a pressure reducing device, and the first oil passage and the second oil passage are connected to form an internal oil circulation passage of the pump body assembly. The oil in the oil pool 92 at the bottom of the compressor shell 91 is stably drained to the moving parts of the pump body assembly by the pressure difference inside the compressor shell 91, the reliable lubrication of the moving parts of the pump body assembly is ensured, and the reliability of the compressor is enhanced.

[0052] In combination Figures 1 to 6 As shown in the drawings, the embodiment of the present disclosure provides a pump body assembly for a compressor, comprising a crankshaft 10, a first cylinder 20, a second cylinder 30 and an intermediate partition plate 40. The crankshaft 10 extends to an oil pool 92 at the bottom of a compressor shell 91, and the crankshaft 10 is provided with a first oil passage, and the first oil passage communicates 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 connected with the first oil passage, and the second end is connected with the first suction port 21 and the second suction port 31. The second oil passage is provided with a pressure reducing device.

[0053] The pump body assembly for the compressor provided by the embodiments 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 and is used to guide 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. 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 of the second oil passage is communicated with the first suction port 21 and the second suction port 31. The first oil passage and the second oil passage are communicated to form an internal oil circulation passage of the pump body assembly, and the pressure difference inside the compressor housing 91 is utilized. A pressure reducing device is arranged in the second oil passage 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 some optional embodiments, the pressure reducing device comprises a first pressure reducing valve 71. The first pressure reducing valve 71 is arranged at the communication position between the second end of the second oil passage and the first suction port 21.

[0055] In this way, the first pressure reducing valve 71 is arranged at the communication position between the second end of the second oil passage and the first suction port 21, the first oil passage and the second oil passage are communicated to form an internal oil circulation passage of the pump body assembly, and the pressure difference inside the compressor housing 91 is utilized. Due to the action of the first pressure reducing valve 71, 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 oil in the oil pool 92 at the bottom of the compressor housing 91 is prevented from splashing at the first suction port 21, 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.

[0056] In some optional embodiments, the pressure reducing device comprises a second pressure reducing valve 72. The second pressure reducing valve 72 is arranged at the communication position between the second end of the second oil passage and the second suction port 31.

[0057] In this way, the second pressure reducing valve 72 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 communicated to form the internal oil circulation passage of the pump assembly. By using 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 drained to the second suction port 31 due to the action of the second pressure reducing valve 72, so as to prevent 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 assembly, thereby ensuring the reliable lubrication of the moving parts of the pump assembly.

[0058] In some optional embodiments, the pressure reducing device includes the first pressure reducing valve 71 and the second pressure reducing valve 72. The first pressure reducing valve 71 is arranged at the communication between the second end of the second oil passage and the first suction port 21. The second pressure reducing valve 72 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 first pressure reducing valve 71 and the second pressure reducing valve 72 are arranged at the communications between the second end of the second oil passage and the first suction port 21 and the second suction port 31, respectively, as shown in Figure 1 and Figure 2 In this way, the first oil passage and the second oil passage are communicated to form the internal oil circulation passage of the pump assembly. By using 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 drained to the first suction port 21 and the second suction port 31 due to the actions of the first pressure reducing valve 71 and the second pressure reducing valve 72, so as to prevent 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 assembly, thereby ensuring the reliable lubrication of the moving parts of the pump assembly.

[0060] In some optional embodiments, in the case where the pressure reducing device includes the first pressure reducing valve 71, the first cylinder 20 is provided with a first pressure reducing groove and a first throttling micro-hole 23, and a first end of the first throttling micro-hole 23 is communicated to the first suction port 21. The end surface of the intermediate partition plate 40 in contact with the first cylinder 20 is provided with a second pressure reducing groove 43 and a second throttling micro-hole 44 communicated to the second pressure reducing groove 43. The second throttling micro-hole 44 corresponds to the second end of the first throttling micro-hole 23 to form a first throttling micro-passage 51, the second pressure reducing groove 43 and the first pressure reducing groove form a first pressure reducing valve cavity, the first pressure reducing valve cavity is communicated to the second oil passage, and the first pressure reducing valve 71 is arranged in the first pressure reducing valve cavity.

[0061] In combination with Figure 3 and Figure 5As shown, in the case that the pressure reducing device comprises the first pressure reducing valve 71, that is, the first pressure reducing valve 71 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 the first pressure reducing groove and the first throttling micro-hole 23, and the first end of the first throttling micro-hole 23 is communicated with the first suction port 21. The end surface of the intermediate partition plate 40 in contact with the first cylinder 20 is provided with the second pressure reducing groove 43 and the second throttling micro-hole 44 communicated with the second pressure reducing groove 43, and here the second throttling micro-hole 44 is connected to the bottom of the second pressure reducing groove 43. By making the second throttling micro-hole 44 correspondingly communicated with the second end of the first throttling micro-hole 23 to form the first throttling micro-channel 51, the second pressure reducing groove 43 and the first pressure reducing groove constitute the first pressure reducing valve cavity, and the first pressure reducing valve cavity is communicated with the second oil passage, so that the first pressure reducing valve cavity and the first throttling micro-channel 51 are communicated with the second oil passage, so that the oil in the oil pool 92 at the bottom of the compressor shell 91 can be drained to the first suction port 21 through the second oil passage. Further, the first pressure reducing valve 71 is arranged in the first pressure reducing valve cavity, and under the action of the first pressure reducing valve 71, the oil in the oil pool 92 at the bottom of the compressor shell 91 can be stably drained to the first suction port 21 through the second oil passage.

[0062] In some optional embodiments, the first pressure reducing valve 71 comprises a first elastic member and a first blocking member. The first elastic member is connected to the first blocking member. Here the first blocking member is connected or blocked with the first throttling micro-channel 51 and the partition plate communication hole 42 under the action of the first elastic member.

[0063] In some optional embodiments, in the case that the pressure reducing device comprises the second pressure reducing valve 72, the second cylinder 30 is provided with the third pressure reducing groove and the third throttling micro-hole 33, and the first end of the third throttling micro-hole 33 is communicated with the second suction port 31. The end surface of the intermediate partition plate 40 in contact with the second cylinder 30 is provided with the fourth pressure reducing groove 42 and the fourth throttling micro-hole 46 communicated with the fourth pressure reducing groove 42. Among them, the fourth throttling micro-hole 46 correspondingly communicated with the second end of the third throttling micro-hole 33 to form the second throttling micro-channel 52, the fourth pressure reducing groove 42 and the third pressure reducing groove constitute the second pressure reducing valve cavity, the second pressure reducing valve cavity is communicated with the second oil passage, and the second pressure reducing valve 72 is arranged in the second pressure reducing valve cavity.

[0064] In combination Figure 4 and Figure 5As shown, in the case that the pressure reducing device comprises the second pressure reducing valve 72, that is, the second pressure reducing valve 72 is arranged at the communication between the second end of the second oil passage and the first suction port 21. The second cylinder 30 is provided with a third pressure reducing groove and a third throttling micro-hole 33, and the first end of the third throttling micro-hole 33 is communicated with the second suction port 31. The end surface of the intermediate partition plate 40 in contact with the second cylinder 30 is provided with a fourth pressure reducing groove 42 and a fourth throttling micro-hole 46 communicated with the fourth pressure reducing groove 42, and here the fourth throttling micro-hole 46 is connected to the bottom of the fourth pressure reducing groove 42. By making the fourth throttling micro-hole 46 correspondingly communicated with the second end of the third throttling micro-hole 33 to form a second throttling micro-channel 52, the fourth pressure reducing groove 42 and the third pressure reducing groove constitute a second pressure reducing valve cavity, and the second pressure reducing valve cavity is communicated with the second oil passage, so that the second pressure reducing valve cavity and the second throttling micro-channel 52 are communicated with the second oil passage, so that the oil in the oil pool 92 at the bottom of the compressor shell 91 can be drained to the second suction port 31 through the second oil passage. Further, the second pressure reducing valve 72 is arranged in the second pressure reducing valve cavity, and under the action of the second pressure reducing valve 72, the oil in the oil pool 92 at the bottom of the compressor shell 91 can be stably drained to the second suction port 31 through the second oil passage.

[0065] In some optional embodiments, the second pressure reducing valve 72 comprises a second elastic member and a second blocking member. The second elastic member is connected to the second blocking member. Here the second blocking member is connected or blocked to the second throttling micro-channel 52 and the partition plate communication hole 42 under the action of the second elastic member.

[0066] In some optional embodiments, the intermediate partition plate 40 comprises a radially arranged partition plate inner hole 41 and an axially arranged partition plate communication hole 42. Among them, the first end of the partition plate inner hole 41 is communicated with the partition plate communication hole 42 to form a second oil passage, and the second end is communicated with a first oil passage, and the first end of the partition plate communication hole 42 is communicated with the second pressure reducing groove 43, and the second end of the partition plate communication hole 42 is communicated with the fourth pressure reducing groove 42.

[0067] In this way, the intermediate partition plate 40 comprises a radially arranged partition plate inner hole 41 and an axially arranged partition plate communication hole 42, as shown. Figure 5 Here the first end of the partition plate inner hole 41 is communicated with the partition plate communication hole 42 to form a second oil passage, and the second end is communicated with a first oil passage, so that the first oil passage and the second oil passage are communicated. Further, the first end and the second end of the partition plate communication hole 42 are respectively communicated with the second pressure reducing groove 43 and the fourth pressure reducing groove 42. That is, the two ends of the partition plate communication hole 42 are respectively communicated with the first pressure reducing valve cavity and the second pressure reducing valve cavity, so that the first oil passage and the second oil passage are communicated, and then the oil in the oil pool 92 at the bottom of the compressor shell 91 is stably drained to the first suction port 21 and the second suction port 31 through the first throttling micro-channel 51 and the second throttling micro-channel 52.

[0068] In some alternative embodiments, the crankshaft 10 comprises 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 comprises a first roller 61 and a second roller 62, the first roller 61 and the second roller 62 are respectively sleeved on the outer side of the first eccentric portion 12 and the second eccentric portion 13. Wherein, the first cylinder 20, the first roller 61, the second cylinder 30, the second roller 62 and the intermediate partition plate 40 enclose to form an oil guiding storage cavity 80, and the second end of the partition plate inner hole 41 is communicated with the oil guiding storage cavity 80, and the oil guiding storage cavity 80 is communicated with the first oil passage.

[0069] In combination with Figure 1 and 6 As shown in the drawings, the crankshaft 10 comprises 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 comprises a first roller 61 and a second roller 62, the first roller 61 and the second roller 62 are respectively sleeved on the outer side 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 to form an oil guiding storage cavity 80, by arranging the second end of the partition plate inner hole 41 to be communicated with the oil guiding storage cavity 80, and the oil guiding storage cavity 80 is communicated with the first oil passage, so that the oil guiding storage cavity 80 is respectively communicated with the first oil passage and the second oil passage, so as to make the first oil passage and the second oil passage communicated. Moreover, here the oil of the oil pool 92 at the bottom of the compressor shell 91 guided from the first oil passage can be stored in the oil guiding storage cavity 80, and then transported to other moving parts of the pump body assembly through the second oil passage, so as to ensure the reliable lubrication of the moving parts of the pump body assembly.

[0070] In some alternative embodiments, the crankshaft 10 comprises an axially arranged crankshaft inner hole 111 and a radially arranged crankshaft communication hole 112 arranged on the shaft body 11. Wherein, the first end of the crankshaft inner hole 111 is communicated with the crankshaft communication hole 112 to form a first oil passage, and 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 storage cavity 80.

[0071] In this way, the crankshaft 10 comprises an axially arranged crankshaft inner hole 111 and a radially arranged crankshaft communication hole 112 arranged on the shaft body 11, as shown in Figure 6As shown in FIG. 1, the first end of the crankshaft inner hole 111 is connected to the crankshaft communication hole 112 to form a first oil passage, and the second end is connected to the oil pool 92 at the bottom of the compressor housing 91, and the crankshaft communication hole 112 is connected to the oil guiding and storing cavity 80, that is, a second oil passage is connected to the oil pool 92 at the bottom of the compressor housing 91, so that the oil at the bottom of the compressor housing 91 is guided to the oil guiding and storing cavity 80 through the first oil passage, and then is transported to other moving parts of the pump body assembly through the second oil passage.

[0072] In some optional embodiments, the pump body assembly further comprises an oil guiding member 14. The oil guiding member 14 is arranged in the crankshaft inner hole 111 and is used to guide the oil at the oil pool 92 at the bottom of the compressor housing 91 to the first oil passage.

[0073] The pump body assembly for the compressor provided by the embodiments of the present disclosure further comprises the oil guiding member 14, which is arranged in the crankshaft inner hole 111, as shown in FIG. 1. Figure 1 The oil guiding member 14 can more conveniently guide the oil at the oil pool 92 at the bottom of the compressor housing 91 to the first oil passage, and then guide the oil to the oil guiding and storing cavity 80 through the first oil passage, and then transport the oil to other moving parts of the pump body assembly through the second oil passage.

[0074] In some optional 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.

[0075] In some optional 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.

[0076] 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 at the oil pool 92 at the bottom of the compressor housing 91 to the crankshaft communication hole 112 directly, and then guide the oil to the oil guiding and storing cavity 80 through the crankshaft communication hole 112, so that the oil at the oil pool 92 at the bottom of the compressor housing 91 is more easily guided to the oil guiding and storing cavity 80, and then is transported to other moving parts of the pump body assembly through the second oil passage.

[0077] The embodiments of the present disclosure further provide a compressor. The compressor comprises the pump body assembly for the compressor described above.

[0078] The embodiments of the present disclosure further provide a compressor. The compressor comprises the pump body assembly for the compressor described above, as shown in FIG. 1. Figure 1The compressor further comprises a compressor housing 91, and an oil pool 92 is arranged at the bottom of the compressor housing 91, and the crankshaft 10 of the pump body assembly extends to the oil pool 92 at the bottom of the compressor housing 91, and the first oil passage arranged by the crankshaft 10 guides the oil in the oil pool 92 at the bottom of the compressor housing 91 to the moving parts of the pump body assembly, thereby ensuring the reliable lubrication of the moving parts of the pump body assembly.

[0079] It should be noted that the pressure inside the compressor housing 91, i.e. the pressure applied to 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. During the operation of the compressor, the flow path of the oil inside the pump body assembly is as shown in Figure 7 Figure 7 The direction of the dashed arrow is the flow direction of the oil inside the pump body assembly. During the rotation of the crankshaft 10, the oil in the oil pool 92 at the bottom of the compressor housing 91 is hoisted under the action of the oil guide 14, and the hoisted 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 through the communication hole 112 of the crankshaft. Then from the oil guide storage cavity 80 into the inner hole 41 of the partition plate, and then flow to the communication hole 42 of the partition plate through the inner hole 41 of the partition plate, and then be divided into the first pressure reducing valve cavity and the second pressure reducing valve cavity through the communication hole 42 of the partition plate. Here, the oil guided here overcomes the elastic force of the first elastic member of the first pressure reducing valve 71 and the second elastic member of the second pressure reducing valve 72, and the first blocking member of the first pressure reducing valve 71 and the second blocking member of the second pressure reducing valve 72 are connected with the first throttling micro-channel 51 and the second throttling micro-channel 52, respectively, thereby making the oil enter the first pressure reducing valve cavity and the second pressure reducing valve cavity, and then enter the first suction port 21 and the second suction port 31 through the first throttling micro-channel 51 and the second throttling micro-channel 52, 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.

[0080] The above description and drawings sufficiently show the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments represent only the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Some parts and features of some embodiments can be included or replaced by parts 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 various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.​

Claims

1. A pump body assembly for a compressor, characterized by, The pump body assembly comprises: a crankshaft, an oil pool at the bottom of the compressor shell to which the end of the crankshaft extends, the crankshaft being provided with a first oil passage, a first cylinder sleeved on the crankshaft, the first cylinder being provided with a first air inlet, a second cylinder sleeved on the crankshaft, the second cylinder being provided with a second air inlet, 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 communicated with the first oil passage, and the second end of the second oil passage being communicated with the first air inlet and the second air inlet, wherein the second oil passage is provided with a pressure reduction device, in the case where the pressure reduction device comprises a first pressure reduction valve, the first cylinder is provided with a first pressure reduction groove and a first throttling micro-hole, and the first end of the first throttling micro-hole is communicated with the first air inlet, the end surface of the intermediate partition plate in contact with the first cylinder is provided with a second pressure reduction groove and a second throttling micro-hole communicated with the second pressure reduction groove, wherein the second throttling micro-hole forms a first throttling micro-channel corresponding to the second end of the first throttling micro-hole, the second pressure reduction groove and the first pressure reduction groove form a first pressure reduction valve cavity, the first pressure reduction valve cavity is communicated with the second oil passage, and the first pressure reduction valve is arranged in the first pressure reduction valve cavity.

2. The pump body assembly according to claim 1, wherein the first pressure reduction valve is arranged at the communication position between the second end of the second oil passage and the first air inlet, and / or the pressure reduction device further comprises: a second pressure reduction valve arranged at the communication position between the second end of the second oil passage and the second air inlet.

3. The pump body assembly according to claim 2, wherein in the case where the pressure reduction device comprises a second pressure reduction valve, the second cylinder is provided with a third pressure reduction groove and a third throttling micro-hole, and the first end of the third throttling micro-hole is communicated with the second air inlet; the end surface of the intermediate partition plate in contact with the second cylinder is provided with a fourth pressure reduction groove and a fourth throttling micro-hole communicated with the fourth pressure reduction groove, wherein the fourth throttling micro-hole forms a second throttling micro-channel corresponding to the second end of the third throttling micro-hole, the fourth pressure reduction groove and the third pressure reduction groove form a second pressure reduction valve cavity, the second pressure reduction valve cavity is communicated with the second oil passage, and the second pressure reduction valve is arranged in the second pressure reduction valve cavity.

4. The pump body assembly according to claim 3, wherein the intermediate partition plate comprises a partition plate inner hole arranged in the radial direction and a partition plate communication hole arranged in the axial direction, wherein the first end of the partition plate inner hole is communicated with the partition plate communication hole to form the second oil passage, the second end of the partition plate inner hole is communicated with the first oil passage, the first end of the partition plate communication hole is communicated with the second pressure reduction groove, and the second end of the partition plate communication hole is communicated with the fourth pressure reduction groove.

5. The pump body assembly according to claim 4, wherein the crankshaft comprises a rod body and first and second eccentric portions arranged on the rod body; the pump body assembly further comprises first and second rollers, the first and second rollers being respectively sleeved on the outer sides of the first and second eccentric portions, wherein the first cylinder, the first roller, the second cylinder, the second roller and the intermediate partition plate enclose an oil guiding and storing cavity, and the second end of the partition plate inner hole is communicated with the oil guiding and storing cavity, the oil guiding and storing cavity being communicated with the first oil passage.

6. The pump body assembly of claim 5, wherein, the crankshaft includes an axially disposed crankshaft bore and a radially disposed crankshaft communication hole disposed in the shaft body, wherein a first end of the crankshaft bore is in communication with the crankshaft communication hole to form a first oil passage, a second end of the crankshaft bore is in communication with the oil sump of the compressor housing bottom, and the crankshaft communication hole is in communication with the oil guiding and storing cavity.

7. The pump body assembly of claim 6, wherein, further comprising: an oil guiding member disposed in the crankshaft bore for guiding oil from the oil sump of the compressor housing bottom to the first oil passage.

8. The pump body assembly of claim 7, wherein, a first end of the oil guiding member is located at the second end of the crankshaft bore, and a second end of the oil guiding member is located at the crankshaft communication hole.

9. A compressor characterized by, a pump body assembly for a compressor as claimed in any one of claims 1 to 8.

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