Pump body assembly, compressor and air conditioner

Abstract

The pump body assembly comprises an air cylinder, the air cylinder is provided with a compression cavity and a sliding sheet groove communicating with the compression cavity, a sliding sheet is arranged in the sliding sheet groove, the sliding sheet groove is provided with a first groove section in sliding fit with the sliding sheet, the first groove section is provided with a first groove wall and a second groove wall, and the first groove wall and the second groove wall are opposite. The first groove wall is close to the suction side of the compression cavity relative to the second groove wall; a side gap is formed between the first groove wall and the slip sheet; the pump body assembly further comprises an oil return channel, an exhaust channel and an oil collecting groove located in the exhaust channel, the oil return channel is used for communicating the bottom of the oil collecting groove with the side gap so that oil at the bottom of the oil collecting groove can be guided to the side gap, and the oil in the side gap can be brought into the compression cavity through reciprocating motion of the sliding piece. According to the technical scheme, the oil circulation rate of refrigerant oil can be reduced, lubrication inside the pump body assembly can be improved, and damage caused by dry friction of the compressor is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a pump assembly, a compressor and an air conditioner. Background Art

[0002] A related patent discloses a pump assembly comprising an upper muffler, an upper bearing, a cylinder, a lower bearing, and a lower muffler. The lower muffler has an oil sump at its base, located above the exhaust passage. Refrigerant oil accumulates in the sump due to gravity. This accumulation of refrigerant oil increases the oil circulation rate, reducing the efficiency of the system's heat exchanger and increasing the risk of dry friction in the compressor. Summary of the Invention

[0003] Therefore, the present invention provides a pump body assembly, a compressor and an air conditioner, which can solve the technical problem in the prior art that the refrigeration oil is deposited in the oil collecting tank, which increases the oil circulation rate of the refrigeration oil and causes dry friction in the compressor.

[0004] To solve the above-mentioned problem, the present invention provides a pump body assembly, comprising a cylinder having a compression chamber and a vane groove communicating with the compression chamber, a vane being provided in the vane groove, the vane being configured to abut against a roller in the compression chamber so as to reciprocate along the vane groove; the vane groove having a first groove section that slidably engages with the vane, the first groove section having opposing first and second groove walls, the first groove wall being closer to the suction side of the compression chamber relative to the second groove wall; and a side gap being formed between the first groove wall and the vane.

[0005] In which, the pump body assembly also includes an oil return channel, an exhaust channel and an oil collecting tank located on the exhaust channel. The oil return channel is used to connect the bottom of the oil collecting tank with the side gap to guide the oil at the bottom of the oil collecting tank to the side gap, so that the slide can bring the oil in the side gap into the compression chamber through its own reciprocating motion.

[0006] In some embodiments, a first oil storage groove is provided on the first groove wall, and the oil return channel is connected to the side gap through the first oil storage groove.

[0007] In some embodiments, the first oil storage groove has a first end and a second end opposite to each other, the first end being closer to the compression chamber than the second end; wherein

[0008] The minimum distance between the first end and the compression chamber wall is L1, and L1 is greater than or equal to 1.5 mm.

[0009] In some embodiments, the slide has a first extreme position of retreating into the slide slot and a second extreme position of extending into the compression chamber;

[0010] In which, a second oil storage groove is provided on the sliding vane; when the sliding vane is located at the first extreme position, the second oil storage groove is opposite to the first groove wall; and when the sliding vane is located at the second extreme position, at least a portion of the second oil storage groove is located in the compression chamber.

[0011] In some embodiments, when a first oil storage groove is provided on the first slot wall and the sliding plate is located at the first extreme position, the second oil storage groove is opposite to the first oil storage groove.

[0012] In some embodiments, the pump assembly further comprises a first bearing and a muffler, wherein the first bearing is used to provide support for the crankshaft that drives the roller to rotate;

[0013] The vane groove passes through the A end of the cylinder in the axial direction. The first bearing is located on the A end side of the cylinder and provides support for the vane. The muffler is arranged on the side of the first bearing away from the cylinder. The oil collecting tank is arranged on the muffler.

[0014] Wherein, the oil return channel is provided on the first bearing.

[0015] In some embodiments, the oil return channel has a first port; the end of the first bearing facing away from the cylinder is end a, the first port of the oil return channel is located at end a, and end a extends into the oil collecting tank so that the oil return channel is connected to the bottom of the oil collecting tank through the first port.

[0016] In some embodiments, the oil return channel has a second port, the end of the first bearing opposite to the cylinder is end b, the second port of the oil return channel is located at end b, and the second port is opposite to the end of the side gap close to the first bearing, so that the oil return channel is connected to the side gap through the second port.

[0017] In some embodiments, the slide groove further has a second groove section connected to the first groove section, the second groove section is used to accommodate an elastic member, and the elastic member is used to apply force to the slide to keep the slide in contact with the roller;

[0018] The second groove section runs through both axial ends of the cylinder, and the second groove section is located on the exhaust passage.

[0019] In some embodiments, the elastic member has a first end a and a second end a opposite to each other, the first end a being farther away from the slide relative to the second end a; the slide is provided with a first limiting structure, the first limiting structure being used to limit the first end a;

[0020] The pump body assembly further includes a second limiting structure for limiting the second end a on both axial sides of the cylinder to prevent the second end a from escaping from the openings of the second groove section at both axial ends of the cylinder.

[0021] In some embodiments, the second end a has opposite first and second side ends along the axial direction of the cylinder; the second groove segment has a first opening located on the first side end and a second opening located on the second side end;

[0022] The second limiting structure includes a limiting member and a limiting platform arranged on the second groove section, the limiting platform is used to limit the first side end to prevent the second end a from escaping from the first opening; the limiting member is used to limit the second side end to prevent the second end a from escaping from the second opening.

[0023] In some embodiments, a slot is provided at the second opening, and the limiting member is inserted into the slot and remains relatively fixed with the slot;

[0024] And / or, the pump body assembly also includes a second bearing, which is located on the second opening side of the second groove section, and the second bearing is used to provide support for the crankshaft that drives the roller to rotate; the limit member is fixed on the second bearing and extends into the second opening.

[0025] In some embodiments, when a slot is provided at the second opening, the limiting member is inserted into the slot and remains relatively fixed with the slot, the limiting member is arranged at the second side end; or, the limiting member extends from one end to the other end of the second opening along the center line direction of the elastic member.

[0026] In some embodiments, when the first oil storage groove has a first end and a second end opposite to each other, and the first end is closer to the compression chamber relative to the second end, the minimum wall thickness between the second end and the second groove segment is L2, and L2 is greater than or equal to 1.5 mm.

[0027] In some embodiments, the end of the second slot segment facing away from the first slot segment is a closed end, and the closed end and the cylinder are an integrally formed structure.

[0028] In some embodiments, the wall thickness of the closed end is L3, and L3 is greater than or equal to 1.5 mm.

[0029] In some embodiments, a single-side gap between the end of the elastic member abutting against the sliding plate and the groove wall of the second groove section is L4, where L4 = 0.4-0.7 mm.

[0030] The present invention also provides a compressor, which includes any one of the pump body components described above.

[0031] The present invention also provides an air conditioner, which includes any one of the pump body components described above; or includes the compressor described above.

[0032] The pump assembly, compressor and air conditioner provided by the present invention have the following beneficial effects:

[0033] 1. The present invention provides an oil return passage connecting the bottom of the oil collecting tank with the side gap between the first groove wall and the sliding vane. Since the oil collecting tank is located on the exhaust passage, the oil collecting tank is at high pressure, while the side gap between the first groove wall and the sliding vane is at medium pressure. In this way, under the action of the pressure difference, the refrigerant oil at the bottom of the oil collecting tank is pumped by the oil return passage to the side gap between the first groove wall and the sliding vane, and then returns to the compression chamber through the reciprocating motion of the sliding vane, thereby reducing the oil circulation rate of the refrigerant oil and increasing the lubrication inside the pump body assembly, thereby preventing dry friction and damage to the compressor.

[0034] 2. By arranging a second groove section for accommodating an elastic member such as a spring on the exhaust channel, a high pressure is generated in the second groove section. This high pressure can assist the elastic member in pushing the slide to maintain contact with the roller, thereby improving the stability of the contact between the slide and the roller and preventing the slide and the roller from detaching.

[0035] 3. Compared with the solution in the prior art in which a spring hole is opened at the tail of the second slot section, which is prone to air leakage, the present invention solves the problem of air leakage in the spring hole in the prior art by designing the end of the second slot section away from the first slot section to be a closed end integrally formed with the cylinder.

[0036] 4. The present invention designs a first limiting structure and a second limiting structure, which cooperate to improve the stability of the elastic member and prevent the elastic member from deflecting. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0038] Figure 1 is a partial cross-sectional schematic diagram of a compressor provided by one embodiment of the present invention;

[0039] Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle;

[0040] Figure 3This is a partial schematic diagram of a pump assembly provided by one embodiment of the present invention;

[0041] Figure 4 yes Figure 3 A magnified schematic diagram of point B in the middle;

[0042] Figure 5 yes Figure 3 Schematic diagram of the assembly of the cylinder, first bearing and sliding vane of the middle pump body assembly;

[0043] Figure 6 This is a schematic diagram of assembling a position limiting member in a pump assembly according to an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of assembling another limiting member in a pump body assembly provided by an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of assembling another limiting member in a compressor provided by one embodiment of the present invention;

[0046] Figure 9 This is a schematic diagram of the assembly of the elastic parts of a conventional cylinder;

[0047] Figure 10 It is a schematic diagram of an assembly of an elastic member provided by one embodiment of the present invention.

[0048] The accompanying drawings are:

[0049] 1. Crankshaft; 2. Roller; 3. Cylinder; 4. Vane; 5. First bearing; 6. Muffler; 7. Second bearing; 8. Exhaust pipe; 9. Elastic member; 10. Limiting member; 11. Limiting platform; 12. Oil return channel; 30. Compression chamber; 31. Vane groove; 32. End A; 31b. First oil storage groove; 40. Side clearance; 41. Second oil storage groove; 42. First limiting structure; 51. End A; 52. End B; 61. Oil collecting tank; 90. Spring hole; 91. First a End; 92, second end a; 921, first side end; 922, second side end; 100, pump body assembly; 101, exhaust channel; 121, first port; 122, second port; 301, compression chamber wall; 311, first groove section; 312, second groove section; 31a1, first groove wall; 31a2, second groove wall; 31b1, first end; 31b2, second end; 3121, first opening; 3122, second opening; 411, c end; 412, d end. DETAILED DESCRIPTION

[0050] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0053] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0054] See also Figure 1-5As shown, according to an embodiment of the present invention, a pump assembly 100 is provided, which includes a cylinder 3 having a compression chamber 30 and a vane groove 31 communicating with the compression chamber 30. A vane 4 is disposed within the vane groove 31 and is configured to abut against a roller 2 within the compression chamber 30 to reciprocate along the vane groove 31. The roller 2 within the compression chamber 30 may also be referred to as a piston in some cases.

[0055] like Figure 3-4 As shown, the aforementioned vane groove 31 has a first groove section 311 that slides with the vane 4. The first groove section 311 has a first groove wall 31a1 and a second groove wall 31a2 that are opposite to each other. The first groove wall 31a1 is closer to the suction side of the compression chamber 30 relative to the second groove wall 31a2. A side gap 40 is formed between the first groove wall 31a1 and the vane 4. The pump body assembly 100 further includes an oil return channel 12, an exhaust channel 101, and an oil collecting trough 61 located on the exhaust channel 101. The oil return channel 12 is used to connect the bottom of the oil collecting trough 61 with the side gap 40 between the aforementioned first groove wall 31a1 and the vane 4, thereby directing the oil at the bottom of the oil collecting trough 61 to the side gap 40, allowing the vane 4 to carry the oil in the side gap 40 into the compression chamber 30 through its own reciprocating motion.

[0056] Among them, when the pump body assembly 100 is running, the exhaust airflow of the compression chamber 30 will carry away part of the refrigerant oil and flow out of the compression chamber 30. After the refrigerant oil comes out of the compression chamber 30 with the exhaust airflow, it will be deposited in the oil collecting tank 61 due to the action of gravity. At this time, if the refrigerant oil here cannot be discharged in time, the oil circulation rate of the refrigerant oil will increase, the efficiency of the system heat exchanger will be reduced, and the risk of dry friction of the compressor will be increased. In the above example, the present invention connects the bottom of the oil collecting tank 61 with the side gap 40 between the aforementioned first groove wall 31a1 and the vane 4 by setting an oil return channel 12. Since the oil collecting tank 61 is located on the exhaust channel 101, the oil collecting tank 61 is at high pressure, while the side gap 40 between the first groove wall 31a1 and the vane 4 is at medium pressure. In this way, under the action of the pressure difference, the refrigerant oil at the bottom of the oil collecting tank 61 will be pumped to the side gap 40 between the first groove wall 31a1 and the vane 4 by the oil return channel 12, and then returned to the compression chamber 30 through the reciprocating motion of the vane 4, thereby reducing the oil circulation rate of the refrigerant oil and increasing the lubrication inside the pump body assembly 100 to prevent the compressor from being damaged by dry friction.

[0057] In some embodiments, as Figure 3-5 As shown, a first oil storage groove 31 b may be provided on the first groove wall 31 a 1 , and the oil return channel 12 is connected to the side gap 40 through the first oil storage groove 31 b .

[0058] In the above example, by providing the first oil storage groove 31 b , the oil storage space of the sliding vane 4 can be increased each time it makes a reciprocating motion, thereby improving the oil pumping efficiency.

[0059] It should be noted that the first oil storage groove 31b can extend through both axial ends of the cylinder 3. Of course, to ensure that the movement trajectory of the slide 4 is not affected by the first oil storage groove 31b during operation, the first oil storage groove 31b can also be designed to extend from one axial end to the other end of the cylinder 3, but not to extend through the other axial end of the cylinder 3.

[0060] In some embodiments, as Figure 4 As shown, the first oil storage groove 31b has a first end 31b1 and a second end 31b2 that are opposite each other. The first end 31b1 is closer to the compression chamber 30 than the second end 31b2. The minimum distance between the first end 31b1 and the wall of the compression chamber 30 is L1, which is greater than or equal to 1.5 mm. This ensures a tight seal between the first end 31b1 and the compression chamber 30, preventing air leakage.

[0061] In some embodiments, the aforementioned sliding vane 4 has a first limit position of retreating into the sliding vane slot 31 and a second limit position of extending into the compression chamber 30. Figure 4 As shown, the sliding vane 4 is provided with a second oil storage groove 41. When the sliding vane 4 is in the first extreme position, the second oil storage groove 41 is opposite the first groove wall 31a1. Furthermore, when the sliding vane 4 is in the second extreme position, at least a portion of the second oil storage groove 41 is located within the compression chamber 30, facilitating the sliding vane 4 to carry the oil in the second oil storage groove 41 into the compression chamber 30. Preferably, when the sliding vane 4 is in the second extreme position, the entire second oil storage groove 41 is located within the compression chamber 30.

[0062] In the above example, by providing the second oil storage groove 41 , the oil storage space of the sliding vane 4 can be increased each time it makes a reciprocating motion, thereby improving the oil pumping efficiency.

[0063] It should be noted here that: Figure 2 As shown, the slide 4 has a C-end 411 and a D-end 412 that are opposite in the axial direction of the cylinder. The second oil storage groove 41 can extend through both ends of the slide 4 in the axial direction of the cylinder. Of course, to ensure that the movement trajectory of the slide 4 is not affected by the second oil storage groove 41 during operation, the second oil storage groove 41 can also be designed to extend from the C-end 411 of the slide 4 to the D-end 412, but not through the D-end 412 of the slide 4.

[0064] In some embodiments, as Figure 2 As shown, when the first oil storage groove 31b is provided on the first groove wall 31a1 and the slide 4 is located at the aforementioned first extreme position, the second oil storage groove 41 is opposite to the first oil storage groove 31b. In this way, the oil return channel 12 only needs to be opposite to one end opening of the first oil storage groove 31b and the second oil storage groove 41, so that oil can be supplied to both the first oil storage groove 31b and the second oil storage groove 41 at the same time, thereby improving the oil return efficiency.

[0065] In some embodiments, as Figure 1 As shown, the aforementioned pump body assembly 100 also includes a first bearing 5 and a muffler 6. The first bearing 5 is used to provide support for the crankshaft 1 that drives the roller 2 to rotate. The aforementioned vane groove 31 passes through the A end 32 in the axial direction of the cylinder 3. The first bearing 5 is located on the A end 32 side of the cylinder 3 and provides support for the vane 4. The muffler 6 is arranged on the side of the first bearing 5 away from the cylinder 3, and the aforementioned oil collecting tank 61 is arranged on the muffler 6. Among them, the aforementioned return oil channel 12 is arranged on the first bearing 5. The return oil channel 12 can be a channel arranged on the first bearing 5.

[0066] In the above-described example, by providing the oil return passage 12 on a single portion, the sealing performance of the oil return passage 12 can be ensured.

[0067] In some embodiments, the first bearing 5 may be a lower bearing, and the muffler 6 may be a lower muffler 6 .

[0068] In order to achieve the aforementioned effect of connecting the oil return channel 12 to the bottom of the oil collecting tank 61, in some embodiments, as shown in FIG. Figure 5 As shown, the aforementioned oil return passage 12 may have a first port 121. The end of the first bearing 5 facing away from the cylinder 3 is end a 51. The first port 121 of the oil return passage 12 is located at end a 51 of the first bearing 5. End a 51 of the first bearing 5 extends into the oil collecting tank 61, allowing the oil return passage 12 to communicate with the bottom of the oil collecting tank 61 through the first port 121.

[0069] In order to achieve the effect of connecting the aforementioned oil return channel 12 with the aforementioned side gap 40, in some embodiments, as shown in FIG. Figure 5 As shown, the aforementioned oil return passage 12 has a second port 122, and the end of the first bearing 5 opposite the cylinder 3 is the b-end 52. The second port 122 of the oil return passage 12 is located at the b-end 52 of the first bearing 5. The second port 122 is opposite the end of the side clearance 40 near the first bearing 5, so that the oil return passage 12 communicates with the side clearance 40 through the second port 122.

[0070] In some embodiments, as Figure 1-2 As shown, the aforementioned vane slot 31 further includes a second slot section 312 connected to the first slot section 311. This second slot section 312 is used to accommodate an elastic member 9, which may be a spring or flexible plastic. The elastic member 9 is used to apply force to the vane 4, maintaining contact between the vane 4 and the roller 2. The second slot section 312 extends through both axial ends of the cylinder 3 and is located on the exhaust passage 101.

[0071] In the above example, since the second groove section 312 is located on the exhaust channel 101, the second groove section 312 is under high pressure. The high pressure can assist the elastic member 9 in pushing the slide 4 to maintain contact with the roller 2, thereby improving the stability of the contact between the slide 4 and the roller 2 and preventing the slide 4 from separating from the roller 2.

[0072] in, Figure 9 A schematic diagram of the structure of a conventional cylinder is provided. A spring hole 90 is provided on the outer circle of the conventional cylinder. After the conventional structure pump body assembly is assembled, the spring is installed through the spring hole 90. Figure 10 As shown, the present invention provides a second groove section 312 on the cylinder 3 to accommodate the elastic member 9, and the second groove section 312 runs through both axial ends of the cylinder 3. The present invention can install the elastic member 9 such as a spring and the slide 4 together from the opening of the second groove section 312 into the cylinder 3 for installation after the pump is centered and before the assembly is centered.

[0073] In some embodiments, as Figure 2 As shown, the elastic member 9 has a first a-end 91 and a second a-end 92 that are opposed to each other. The first a-end 91 is spaced away from the slide 4 relative to the second a-end 92. The slide 4 is provided with a first limiting structure 42 for limiting the position of the first a-end 91. The pump body assembly 100 further includes a second limiting structure for limiting the position of the second a-end 92 on both axial sides of the cylinder 3 to prevent the second a-end 92 from escaping from the openings of the second groove section 312 at both axial ends of the cylinder 3.

[0074] In the above example, the first limiting structure 42 cooperates with the second limiting structure to improve the stability of the elastic member 9 and prevent the elastic member 9 from deflecting.

[0075] In order to realize the function of the aforementioned first limiting structure 42, in some embodiments, as Figure 2 As shown, the aforementioned first limiting structure 42 may include a limiting protrusion provided on the slide 4 , and the first limiting structure 42 is inserted into the first end a 91 of the elastic member 9 through the limiting protrusion to limit the first end a 91 of the elastic member 9 .

[0076] In order to realize the function of the aforementioned second limiting structure, in some embodiments, as Figure 2As shown, the aforementioned second a-end 92 has a first side end 921 and a second side end 922 opposite to each other along the axial ends of the cylinder 3. The second groove section 312 has a first opening 3121 located on the side of the first side end 921 and a second opening 3122 located on the side of the second side end 922. The first opening 3121 and the second opening 3122 are located at the axial ends of the cylinder 3. The aforementioned second limiting structure includes a limiting member 10 and a limiting platform 11 provided on the second groove section 312. The limiting platform 11 is used to limit the first side end 921 to prevent the second a-end 92 from escaping from the first opening 3121. The limiting platform 11 and the cylinder 3 can be an integrally formed structure to improve the connection stability of the limiting platform 11 and the second groove section 312. The limiting member 10 is used to limit the second side end 922 to prevent the second a-end 92 from escaping from the second opening 3122.

[0077] In the above example, the limit platform 11 cooperates with the limit member 10 to realize the function of the above-mentioned second limit structure, thereby limiting the second end a 92 on both axial sides of the cylinder 3 to prevent the second end a 92 from escaping from the openings of the second groove section 312 at both axial ends of the cylinder 3.

[0078] To install the aforementioned stopper 10, in the first example, a slot can be provided at the aforementioned second opening 3122, into which the stopper 10 is inserted and secured relative to the slot. The stopper 10 can be secured relative to the slot by an interference fit. The stopper 10 can also be secured within the slot by a second bearing 7 on one axial side of the cylinder 3, thereby securing the stopper 10 relative to the slot. In this first example, the stopper 10 can be a latch, etc.

[0079] Furthermore, when a slot is provided at the second opening 3122, the limiting member 10 is inserted into the slot and remains relatively fixed with the slot, in one example, as shown in FIG. Figure 6 As shown, the limiting member 10 can be set at the second side end 922 to limit only the second side end 922 of the elastic member 9. In this case, the volume of the limiting member 10 is small, which can save material costs. Figure 7 As shown, the limiting member 10 can extend from one end of the second opening 3122 to the other end along the center line direction of the elastic member 9, so that the limiting member 10 can not only limit the second side end 922 of the elastic member 9, but also limit the middle part of the elastic member 9, and its limiting performance is better.

[0080] In order to install the aforementioned limiting member 10, in the second example, as Figure 8As shown, the aforementioned pump body assembly 100 further includes a second bearing 7, which is located on the second opening 3122 side of the second groove section 312. The second bearing 7 is used to provide support for the crankshaft 1 that drives the roller 2 to rotate. The aforementioned stopper 10 is fixed to the second bearing 7 and extends into the second opening 3122. In this second example, the stopper 10 can be a rivet provided on the second bearing 7, and the stopper 10 is fixed to the second bearing 7.

[0081] To achieve the function of the aforementioned second limiting structure, in other embodiments, the second limiting structure may include a fixing groove provided at the end of the second groove section 312 facing away from the first groove section 311. The second end a 92 of the elastic member 9 is interference-fitted with the fixing groove, so that the second limiting structure can limit the second end a 92 on both sides of the axial direction of the cylinder 3 through the fixing groove, thereby preventing the second end a 92 from escaping from the openings of the second groove section 312 at both ends of the axial direction of the cylinder 3. The second end a 92 of the elastic member 9 and the fixing groove can be assembled with an interference fit clearance of 0.2-0.35 mm per side to limit the displacement of the second end a 92 of the elastic member 9.

[0082] In some embodiments, as Figure 1 As shown, the aforementioned second bearing 7 may be an upper bearing, and the aforementioned exhaust passage 101 includes an exhaust pipe 8 disposed on the upper bearing. The aforementioned pump body assembly 100 also includes an intake pipe, through which refrigerant, such as R290 refrigerant, enters the compression chamber 30. The refrigerant is compressed within the compression chamber 30 and then discharged from the compressor through the oil sump 61 at the bottom of the muffler 6, the exhaust hole section on the first bearing 5, the second trough section 312, and the exhaust pipe 8. The second trough section 312 forms a relatively sealed high-pressure chamber area for the inflow and outflow of refrigerant. The head of the vane 4 is located within the compression chamber 30, and the tail of the vane 4 is located within the second trough section 312. The head of the vane 4 is subjected to the refrigerant pressure within the compression chamber 30, which partially offsets the refrigerant pressure experienced by the tail of the vane 4, thereby reducing the risk of the vane 4 detaching from the roller 2 in low backpressure compressors. When the refrigerant passes through the second groove section 312, there is no risk of ineffective compression such as leaking into the compressor housing and re-entering the pump body to be compressed again, thereby improving the unit volume efficiency of the compressor.

[0083] In some embodiments, as Figure 4 As shown, when the first oil storage groove 31b has a first end 31b1 and a second end 31b2 relative to each other, and the first end 31b1 is closer to the compression chamber 30 relative to the second end 31b2, the minimum wall thickness between the second end 31b2 and the second groove section 312 is L2, and L2 is greater than or equal to 1.5 mm. In this way, the sealing between the second end 31b2 and the second groove section 312 can be ensured to prevent air leakage.

[0084] In some embodiments, as Figure 10 As shown, the end of the second groove section 312 facing away from the first groove section 311 is a closed end, and the closed end and the cylinder 3 are an integrally formed structure.

[0085] Compared with the solution in the prior art that opens a spring hole 90 at the tail of the second groove section 312 which is prone to air leakage, the present invention avoids leakage by designing the end of the second groove section 312 facing away from the first groove section 311 as a closed end integrally formed with the cylinder 3, and forming a surface seal between the bearing end face and the cylinder 3 end face, thereby solving the problem of air leakage in the spring hole 90 in the prior art, so that the exhaust airflow in the exhaust channel 101 will not leak into the compressor housing when passing through the second groove section 312, avoiding the risk of ineffective compression caused by re-entering the pump body and being compressed again due to leakage, thereby improving the unit volumetric efficiency of the compressor.

[0086] In addition, the present invention can also prevent the elastic member 9 from falling out of the second groove section 312 by designing the end of the second groove section 312 facing away from the first groove section 311 to be a closed end integrally formed with the cylinder 3, thereby solving the problem that the elastic member 9 of the conventional structure may fall out of the second groove section 312.

[0087] It should be noted that in some other embodiments, the end of the second groove section 312 facing away from the first groove section 311 can be an open end, which can be sealed with a sealing plug or the like. However, this can easily cause deformation of the vane groove 31, displacement of the pump body centering, and insufficient lubrication of the vane 4, thereby affecting the performance of the compressor pump body. Therefore, preferably, the end of the second groove section 312 facing away from the first groove section 311 is designed to be a closed end integrally formed with the cylinder 3.

[0088] In some embodiments, as Figure 10 As shown, the wall thickness of the aforementioned closed end is L3. Considering the impact on the structural strength of the cylinder 3 and the possibility of end face leakage, L3 is greater than or equal to 1.5 mm.

[0089] The outer diameter of the elastic member 9 needs to be compatible with the dimensions of the second groove section 312 on the cylinder 3. In some embodiments, the unilateral clearance between the end of the elastic member 9 that contacts the vane 4 and the wall of the second groove section 312 is L4, where L4 = 0.4 to 0.7 mm. Preferably, L4 = 0.5 mm. This prevents the elastic member 9 from shifting and scraping against the wall, causing failure of the elastic member 9. It also prevents the excessive width of the second groove section 312 from reducing the structural strength of the cylinder 3, leading to a decrease in subsequent finishing accuracy and a decrease in pump efficiency due to excessive deformation of the vane groove 31 after pump installation.

[0090] The present invention further provides a compressor comprising any of the above-described pump body assemblies 100. Since the compressor utilizes the above-described pump body assembly 100, the present invention provides an oil return passage 12 connecting the bottom of the oil collecting trough 61 with the side gap 40 between the first groove wall 31a1 and the vane 4. Since the oil collecting trough 61 is located on the exhaust passage 101, the oil collecting trough 61 is at high pressure, while the side gap 40 between the first groove wall 31a1 and the vane 4 is at medium pressure. Consequently, under the action of the pressure difference, the refrigerant oil at the bottom of the oil collecting trough 61 is pumped by the oil return passage 12 to the side gap 40 between the first groove wall 31a1 and the vane 4, and then returns to the compression chamber 30 through the reciprocating motion of the vane 4. This reduces the oil circulation rate of the refrigerant oil and increases lubrication within the pump body assembly 100, thereby preventing dry friction and damage to the compressor.

[0091] In some embodiments, the aforementioned compressor may be a rolling piston compressor.

[0092] The present invention further provides an air conditioner comprising any of the above-described pump body assemblies 100; or comprising the above-described compressor. Because the air conditioner utilizes the above-described pump body assembly 100, the present invention provides an oil return passage 12 to connect the bottom of the oil collecting tank 61 with the side gap 40 between the first tank wall 31a1 and the vane 4. Because the oil collecting tank 61 is located on the exhaust passage 101, the oil collecting tank 61 is at high pressure, while the side gap 40 between the first tank wall 31a1 and the vane 4 is at medium pressure. Consequently, under the action of the pressure difference, the refrigerant oil at the bottom of the oil collecting tank 61 is pumped by the oil return passage 12 to the side gap 40 between the first tank wall 31a1 and the vane 4, and then returns to the compression chamber 30 through the reciprocating motion of the vane 4. This reduces the oil circulation rate of the refrigerant oil and increases lubrication within the pump body assembly 100, thereby preventing dry friction and damage to the compressor.

[0093] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A pump assembly (100), characterized in that: The invention comprises a cylinder (3), wherein the cylinder (3) has a compression chamber (30) and a vane groove (31) connected to the compression chamber (30), wherein a vane (4) is arranged in the vane groove (31), and the vane (4) is used to maintain contact with a roller (2) in the compression chamber (30) so as to reciprocate along the vane groove (31); the vane groove (31) has a first groove section (311) which is slidably matched with the vane (4), the first groove section (311) has a first groove wall (31a1) and a second groove wall (31a2) which are opposite to each other, the first groove wall (31a1) being closer to the suction side of the compression chamber (30) relative to the second groove wall (31a2); and a side gap (40) is formed between the first groove wall (31a1) and the vane (4); The pump body assembly (100) further comprises an oil return channel (12), an exhaust channel (101) and an oil collecting groove (61) located on the exhaust channel (101); the oil return channel (12) is used to connect the bottom of the oil collecting groove (61) with the side gap (40) so as to guide the oil at the bottom of the oil collecting groove (61) to the side gap (40), so that the sliding vane (4) can bring the oil in the side gap (40) into the compression chamber (30) through its own reciprocating motion.

2. The pump assembly (100) according to claim 1, characterized in that: A first oil storage groove (31b) is provided on the first groove wall (31a1), and the oil return channel (12) is connected to the side gap (40) through the first oil storage groove (31b).

3. The pump assembly (100) according to claim 2, characterized in that: The first oil storage groove (31b) has a first end (31b1) and a second end (31b2) opposite to each other, and the first end (31b1) is closer to the compression chamber (30) than the second end (31b2); wherein, The minimum distance between the first end (31b1) and the wall of the compression chamber (30) is L1, and L1 is greater than or equal to 1.5 mm.

4. The pump assembly (100) according to any one of claims 1 to 3, characterized in that: The sliding vane (4) has a first extreme position of retreating into the sliding vane groove (31) and a second extreme position of extending into the compression chamber (30); Wherein, a second oil storage groove (41) is provided on the sliding vane (4); when the sliding vane (4) is located at the first extreme position, the second oil storage groove (41) is opposite to the first groove wall (31a1); and when the sliding vane (4) is located at the second extreme position, at least a portion of the second oil storage groove (41) is located in the compression chamber (30).

5. The pump assembly (100) according to claim 4, characterized in that: When a first oil storage groove (31b) is provided on the first groove wall (31a1) and the sliding plate (4) is located at the first limit position, the second oil storage groove (41) is opposite to the first oil storage groove (31b).

6. The pump assembly (100) according to any one of claims 1 to 3 and 5, characterized in that: It also includes a first bearing (5) and a muffler (6), wherein the first bearing (5) is used to provide support for the crankshaft (1) that drives the roller (2) to rotate; The vane groove (31) penetrates the A end (32) of the cylinder (3) in the axial direction; the first bearing (5) is located on the A end (32) side of the cylinder (3) and provides support for the vane (4); the muffler (6) is arranged on a side of the first bearing (5) away from the cylinder (3); and the oil collecting groove (61) is arranged on the muffler (6); Wherein, the oil return channel (12) is arranged on the first bearing (5).

7. The pump assembly (100) according to claim 6, characterized in that: The oil return channel (12) has a first port (121); the end of the first bearing (5) facing away from the cylinder (3) is end a (51); the first port (121) of the oil return channel (12) is located at end a (51); and end a (51) extends into the oil collecting tank (61), so that the oil return channel (12) is connected to the bottom of the oil collecting tank (61) through the first port (121).

8. The pump assembly (100) according to claim 6, characterized in that: The oil return passage (12) has a second port (122); the end of the first bearing (5) opposite to the cylinder (3) is the b-end (52); the second port (122) of the oil return passage (12) is located at the b-end (52); the second port (122) is opposite to the end of the side clearance (40) close to the first bearing (5), so that the oil return passage (12) is connected to the side clearance (40) through the second port (122).

9. The pump assembly (100) according to any one of claims 1-3, 5, 7-8, characterized in that: The slide plate groove (31) further comprises a second groove section (312) connected to the first groove section (311), the second groove section (312) being used to accommodate an elastic member (9), the elastic member (9) being used to apply a force to the slide plate (4) so ​​that the slide plate (4) and the roller (2) are kept in contact with each other; The second groove section (312) passes through two axial ends of the cylinder (3), and the second groove section (312) is located on the exhaust passage (101).

10. The pump assembly (100) according to claim 9, characterized in that: The elastic member (9) has a first a-end (91) and a second a-end (92) opposite to each other, the first a-end (91) being farther away from the sliding plate (4) relative to the second a-end (92); a first limiting structure (42) is provided on the sliding plate (4), the first limiting structure (42) being used for limiting the first a-end (91); The pump body assembly (100) further includes a second limiting structure, which is used to limit the second end a (92) on both axial sides of the cylinder (3) to prevent the second end a (92) from escaping from the openings of the second groove section (312) at both axial ends of the cylinder (3).

11. The pump assembly (100) according to claim 10, characterized in that: The second end a (92) has a first side end (921) and a second side end (922) opposite to each other at two axial ends of the cylinder (3); the second groove section (312) has a first opening (3121) located on the first side end (921) and a second opening (3122) located on the second side end (922); The second limiting structure comprises a limiting member (10) and a limiting platform (11) arranged on the second groove section (312); the limiting platform (11) is used to limit the first side end (921) to prevent the second a end (92) from escaping from the first opening (3121); the limiting member (10) is used to limit the second side end (922) to prevent the second a end (92) from escaping from the second opening (3122).

12. The pump assembly (100) according to claim 11, characterized in that: A slot is provided at the second opening (3122), and the limiting member (10) is inserted into the slot and remains relatively fixed with the slot; And / or, the pump body assembly (100) further comprises a second bearing (7), the second bearing (7) being located on the second opening (3122) side of the second groove section (312), the second bearing (7) being used to provide support for the crankshaft (1) that drives the roller (2) to rotate; the limiting member (10) is fixed on the second bearing (7) and extends into the second opening (3122).

13. The pump assembly (100) according to claim 12, characterized in that: When a slot is provided at the second opening (3122), and the limiting member (10) is inserted into the slot and remains relatively fixed with the slot, the limiting member (10) is arranged at the second side end (922); or, the limiting member (10) extends from one end to the other end of the second opening (3122) along the center line direction of the elastic member (9).

14. The pump assembly (100) according to claim 9, characterized in that: When the first oil storage groove (31b) has a first end (31b1) and a second end (31b2) opposite to each other, and the first end (31b1) is closer to the compression chamber (30) relative to the second end (31b2), the minimum wall thickness between the second end (31b2) and the second groove section (312) is L2, and L2 is greater than or equal to 1.5 mm.

15. The pump assembly (100) according to claim 9, characterized in that: The end of the second groove section (312) that faces away from the first groove section (311) is a closed end, and the closed end and the cylinder (3) are an integrally formed structure.

16. The pump assembly (100) according to claim 15, characterized in that: The wall thickness of the closed end is L3, and L3 is greater than or equal to 1.5 mm.

17. The pump assembly (100) according to claim 9, characterized in that: The single-side gap between the end of the elastic member (9) that abuts against the sliding plate (4) and the groove wall of the second groove section (312) is L4, where L4 = 0.4-0.7 mm.

18. A compressor, characterized in that: The pump body assembly (100) comprises any one of claims 1-17.

19. An air conditioner, characterized in that: A pump body assembly (100) comprising any one of claims 1 to 17; or a compressor as claimed in claim 18.

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