CN117167272A - Pump body assembly, compressor and air conditioner - Google Patents

Abstract

The application provides a pump body assembly, a compressor and an air conditioner, wherein the pump body assembly comprises: the cylinder is provided with an air suction hole and a sliding vane groove at intervals; the upper flange is arranged on the air cylinder, the upper flange is positioned above the air cylinder, a backflow channel is arranged on the upper flange, the backflow channel penetrates through the upper flange along the axial direction of the upper flange, and the backflow channel extends along the circumferential direction of the upper flange; at least one of the air suction holes and the sliding vane grooves is arranged in a staggered manner with the distribution interval of the reflux channel along the circumferential direction of the upper flange. By the technical scheme provided by the application, the technical problem that liquid frozen oil in the prior art cannot smoothly flow back into the oil pool can be solved.

Description

Pump body assembly, compressor and air conditioner

Technical Field

The application relates to the technical field of compressors, in particular to a pump body assembly, a compressor and an air conditioner.

Background

At present, a compressor in the prior art mainly comprises a pump body component, a motor component, a liquid distributor component, a shell component and the like, wherein the shell component is used for forming a closed cavity structure, and the pump body component and the motor component are arranged inside the shell. The pump body assembly mainly comprises main parts such as an upper flange, a cylinder, a crankshaft, a roller, a lower flange, a sliding vane and the like, and the parts are matched to form a high-pressure exhaust cavity and a low-pressure air suction cavity. The motor assembly mainly comprises a rotor assembly and a stator assembly. The lower part of the shell is an oil pool which contains a certain amount of frozen oil.

For the rotary compressor, the rotary compressor generates driving force to the pump crankshaft through the motor, and under the rotary driving action of the crankshaft, the sliding vane is made to reciprocate in the sliding vane groove by utilizing the eccentric part structure of the crankshaft, so that the volume of the suction and exhaust cavity of the compressor is periodically changed, and the processes of periodic suction, compression and exhaust of the compressor are realized. After the gas exhausted from the pump body cavity enters the lower cavity space of the motor, the gas mainly flows to the upper cavity of the motor through the rotor flow holes, and then is exhausted out of the compressor to enter the air conditioning system. The gas exhausted by the pump body is usually the mixed gas of refrigerant and refrigerating oil, and the gaseous lubricating oil mixed in the refrigerant is liquefied and separated by impacting motor parts or an oil blocking structure in the exhaust circulation process, and the separated liquid refrigerating oil mainly flows back to a motor lower cavity through a trimming gap on the inner wall of the shell and the outer peripheral surface of the motor stator and further flows back to a compressor oil tank through an upper flange hollowed-out circulation channel.

However, in the process of refluxing liquid refrigeration oil, the situation that part of liquid refrigeration oil flows back to the air suction hole of the air cylinder and the sliding vane groove of the air cylinder often occurs, so that the invalid refluxing situation of the liquid refrigeration oil is caused, and part of liquid refrigeration oil cannot be returned to the oil tank in time, so that the compressor oil Chi Queyou is caused, and the problem of reliability of abrasion of friction pair parts caused by insufficient oil supply of the pump body is caused.

Disclosure of Invention

The application mainly aims to provide a pump body assembly, a compressor and an air conditioner, so as to solve the technical problem that liquid frozen oil in the prior art cannot smoothly flow back into an oil pool.

In order to achieve the above object, according to one aspect of the present application, there is provided a pump body assembly comprising:

the cylinder is provided with an air suction hole and a sliding vane groove at intervals;

the upper flange is arranged on the air cylinder, the upper flange is positioned above the air cylinder, a backflow channel is arranged on the upper flange, the backflow channel penetrates through the upper flange along the axial direction of the upper flange, and the backflow channel extends along the circumferential direction of the upper flange;

at least one of the air suction holes and the sliding vane grooves is arranged in a staggered manner with the distribution interval of the reflux channel along the circumferential direction of the upper flange.

Further, the air suction holes and the sliding vane grooves are arranged at intervals along the circumferential direction of the air cylinder;

and the distribution intervals of the air suction holes and the sliding vane grooves are staggered with the distribution intervals of the reflux channels along the circumferential direction of the upper flange.

Further, the air cylinder comprises a cylinder body part and a connecting part which are connected with each other, the connecting part is arranged protruding out of the side part of the cylinder body part, an air suction hole and a sliding vane groove are arranged on the connecting part, and the connecting part extends along the circumferential direction of the cylinder body part;

the connecting part and the distribution interval of the reflux channel are arranged in a staggered manner along the circumferential direction of the upper flange.

Further, the upper flange comprises a flange body and an exhaust valve seat which are connected with each other; the distribution intervals of the exhaust valve seat and the return channel are arranged in a staggered manner along the circumferential direction of the upper flange.

Further, the exhaust amount of the pump body assembly is V, the running frequency of the pump body assembly is f, and the flow area of the backflow channel is S;

wherein S/(0.001 Vf) is less than or equal to 0.1 and less than or equal to 0.6.

Further, the radius of the center circle corresponding to the backflow channel is R0, the outer radius of the upper flange is R, and the radial maximum width of the backflow channel is w;

wherein 1- (r) ₀ +0.5w)/R≥0.05。

Further, the upper flange is welded with the to-be-connected piece; and the welding part of the upper flange and the to-be-connected piece welded with the distribution interval of the reflux channel are arranged in a staggered manner along the circumferential direction of the upper flange.

Further, the end part of the sliding vane groove is provided with a tail hole, the tail hole is a round hole, and the diameter of the tail hole is d; the upper flange is provided with a first avoiding hole corresponding to the tail hole, the first avoiding hole is opposite to the tail hole, the first avoiding hole is a round hole, and the diameter of the first avoiding hole is D;

wherein D is not less than D and not more than d+0.5mm.

Further, the cylinder is provided with a process hole; and the distribution intervals of the process holes and the reflux channels are arranged in a staggered manner along the circumferential direction of the cylinder.

Further, a second avoidance hole which is opposite to the process hole is formed in the upper flange, the process hole and the second avoidance hole are round holes, the diameter of the process hole is D1, and the diameter of the second avoidance hole is D1;

wherein d1 is more than or equal to d1 and less than or equal to d1+0.5mm.

Further, the backflow channel comprises a plurality of backflow holes which are arranged at intervals along the circumferential direction of the upper flange, and the distance between two backflow holes at two ends of the plurality of backflow holes forms a distribution interval of the backflow channel.

According to another aspect of the present application, there is provided a compressor comprising the pump body assembly provided above.

According to still another aspect of the present application, there is provided an air conditioner including the compressor provided above.

By adopting the technical scheme, the possibility that the oil flowing out of the reflux channel enters at least one of the suction hole and the slide groove can be effectively reduced by arranging at least one of the suction hole and the slide groove and the distribution interval of the reflux channel in a staggered manner, so that the ineffective reflux condition of the frozen oil is effectively reduced, the frozen oil can be smoothly returned to the oil pool, and the recombined oil in the oil pool is ensured. Therefore, by the technical scheme provided by the application, the technical problem that liquid frozen oil in the prior art cannot smoothly flow back into the oil pool can be solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic structural view of an upper flange provided in accordance with an embodiment of the present application;

FIG. 2 shows a schematic structural view of a pump body assembly provided in accordance with an embodiment of the present application;

FIG. 3 illustrates a schematic structural view of an upper flange having a first relief hole provided in accordance with an embodiment of the present application;

FIG. 4 shows a schematic structural view of an upper flange provided with a first relief hole and a second relief hole according to an embodiment of the present application;

FIG. 5 illustrates a schematic structural view of an upper flange having a plurality of second relief holes provided in accordance with an embodiment of the present application;

FIG. 6 shows a schematic structural view of the upper flange and cylinder mating provided in accordance with an embodiment of the present application;

fig. 7 shows a simulated schematic diagram of the structural rigidity of an upper flange provided according to an embodiment of the application.

Wherein the above figures include the following reference numerals:

10. a pump body assembly;

11. a cylinder; 111. an air suction hole; 112. a slide groove; 1121. tail holes; 113. a cylinder portion; 114. a connection part; 115. a process hole; 116. an exhaust hole; 117. a boss;

12. an upper flange; 121. a return passage; 1211. a reflow hole; 122. a flange body; 123. an exhaust valve seat; 1231. a flange exhaust port; 124. a first avoidance hole; 125. a second avoidance hole; 126. and welding spots.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 to 6, an embodiment of the present application provides a pump body assembly 10, the pump body assembly 10 including a cylinder 11 and an upper flange 12. The cylinder 11 is provided with an air suction hole 111 and a sliding vane groove 112 at intervals, the upper flange 12 is arranged on the cylinder 11, the upper flange 12 is positioned above the cylinder 11, the upper flange 12 is provided with a backflow channel 121, the backflow channel 121 penetrates through the upper flange 12 along the axial direction of the upper flange 12, and the backflow channel 121 extends along the circumferential direction of the upper flange 12. At least one of the suction hole 111 and the slide groove 112 is offset from the distribution area of the return passage 121 along the circumferential direction of the upper flange 12.

The phrase "at least one of the suction holes 111 and the vane grooves 112 is offset from the distribution area of the return flow channels 121 along the circumferential direction of the upper flange 12" means that at least one of the suction holes and the vane grooves 112 is not provided in correspondence with the return flow channels 121 in the circumferential direction of the upper flange 12, and does not have overlapping and staggered areas. The definition of the rest of the dislocation set in the present application is explained above.

By adopting the pump body assembly 10 provided by the embodiment, the possibility that the oil flowing out through the backflow channel 121 enters at least one of the suction hole 111 and the sliding vane groove 112 can be effectively reduced by arranging the distribution interval of the suction hole 111 and the sliding vane groove 112 in a staggered manner with the distribution interval of the backflow channel 121, so that the invalid backflow condition of the frozen oil is effectively reduced, and the frozen oil can be smoothly returned into the oil pool to ensure that the oil pool is provided with recombined oil. Therefore, through the pump body assembly 10 provided by the embodiment, the technical problem that liquid frozen oil in the prior art cannot smoothly flow back into the oil pool can be solved.

In addition, with the above structure, since the suction hole 111 and the slide groove 112 are hollow structures, the return passage 121 is also hollow structures, so that the situation that the structural strength is weaker due to the hollow structures and even vibration noise is enhanced due to the relative arrangement of the hollow structures can be avoided. Through the structural optimization design of the upper flange 12, the rigidity of the upper flange 12 and the flow area of the backflow channel 121 are ensured while the invalid design of the backflow channel 121 of the upper flange 12 is avoided, so that the structural rigidity of the oil return channel of the compressor and the pump body assembly 10 is optimized, the reliability of the compressor is improved, and meanwhile, the problem of vibration noise of the compressor caused by insufficient rigidity is avoided.

In the present embodiment, the suction holes 111 and the vane grooves 112 are provided at intervals along the circumferential direction of the cylinder 11. The distribution intervals of the air suction holes 111 and the slide grooves 112 and the distribution intervals of the return channels 121 are arranged in a staggered manner along the circumferential direction of the upper flange 12. By adopting the structure, the possibility that the frozen oil enters the air suction hole 111 and the sliding vane groove 112 can be avoided, and invalid oil return is avoided, so that the frozen oil can be ensured to smoothly return to the oil tank, and the condition of lacking oil in the oil tank is avoided.

Specifically, the cylinder 11 includes a cylinder portion 113 and a connecting portion 114 connected to each other, the connecting portion 114 being provided protruding from a side portion of the cylinder portion 113, the connecting portion 114 being provided with an air suction hole 111 and a slide groove 112, the connecting portion 114 extending circumferentially along the cylinder portion 113. The connection portion 114 and the distribution area of the return channel 121 are offset from each other along the circumferential direction of the upper flange 12. By adopting the structure, the entity structure where the air suction hole 111 and the sliding vane groove 112 are located is the dislocation arrangement of the whole connecting part 114 and the backflow channel 121, so that the oil at the backflow channel 121 can be effectively prevented from flowing into the connecting part 114, and the frozen oil can be better prevented from flowing into the air suction hole 111 and the sliding vane groove 112 through the connecting part 114, and the smoothness of the backflow of the frozen oil into the oil pool can be further ensured.

Specifically, the cylinder 11 is further provided with an exhaust hole 116.

In the present embodiment, the upper flange 12 includes a flange body 122 and an exhaust valve seat 123 that are connected to each other; the exhaust valve seat 123 and the distribution area of the return passage 121 are offset from each other in the circumferential direction of the upper flange 12. With such a structural arrangement, since the exhaust valve seat 123 is of a sinking groove structure, the exhaust valve seat 123 is a weak rigidity area of the upper flange 12, and the backflow channel 121 is of a hollow structure, that is, weak rigidity, when the distribution areas of the exhaust valve seat 123 and the backflow channel 121 are intensively distributed in a region, the rigidity in the region is weak, which is inconvenient for the overall structural strength and structural stability of the upper flange 12. By arranging the exhaust valve seat 123 and the upper flange 12 in a staggered manner along the circumferential direction of the upper flange 12, the concentrated distribution of the two weak rigidity areas can be avoided, the condition that the overall strength of the upper flange 12 is weaker is avoided, and the overall strength of the upper flange 12 is conveniently improved.

Specifically, the exhaust valve seat 123 is provided with a flange exhaust port 1231.

Specifically, the angle range of the distribution of the return channels 121 is 2pi- θ, the position span angle of the exhaust valve seat 123 is α, the position span angle of the connection structure at the suction hole 111 and the slide groove 112 of the cylinder 11 is β, and the overlapping regions of 2pi- θ and α, 2pi- θ and β are not respectively provided. Therefore, the entity structure of the backflow channel 121 of the upper flange 12 and the outer edge of the cylinder 11 is a connecting structure, so that the interference and overlapping are avoided, the rigidity of the flange is improved while invalid backflow is avoided, the timely smoothness of the backflow of the frozen lubricating oil is improved, the oil level of an oil pool and the oil supply lubrication of a pump body are ensured, the reliability risk of the compressor caused by insufficient lubrication is reduced, and meanwhile, the vibration noise is optimized. Further, the backflow channel 121 of the upper flange 12 reasonably avoids the weak rigidity area (near the exhaust valve seat 123) of the upper flange 12, so that the rigidity of the flange is greatly improved, and the vibration noise of the compressor is further optimized.

Specifically, the displacement of the pump body assembly is V, the operating frequency of the pump body assembly is f, and the flow area of the return passage 121 is S. Wherein S/(0.001 Vf) is less than or equal to 0.1 and less than or equal to 0.6. By adopting the structure, the compressor can have the oil return flow area of the upper flange 12 matched with the compressor under high-frequency operation, further, the situation that the oil return to the bottom of the compressor is timely and smooth after the separation of the frozen oil mixed in the gas is ensured, the problem of reliability of pump part abrasion caused by insufficient oil supply and lubrication of the pump body due to oil shortage at the bottom of the oil tank caused by unsmooth oil return when the compressor operates at high frequency is solved.

Preferably, 0.24.ltoreq.S/(0.001 Vf). Ltoreq.0.39, which can facilitate more effective assurance of a more appropriate oil return flow area of the upper flange 12 with the corresponding high-frequency operation mode.

It should be noted that, while the maximum operating frequency of the conventional compressor in the prior art is about 120Hz, the maximum operating frequency of the high-speed compressor of the present application is above 120Hz or far above 120Hz, the maximum gas delivery (Vf) is greatly improved, and the gas contains a large amount of refrigerant oil, so that the refrigerant oil flowing along with the gas delivery must be greatly increased, and the evaluation index S/(0.001 Vf) can be briefly understood as: compared with the conventional compressor in the prior art, the evaluation index of the high-speed compressor can be greatly reduced (the evaluation index is inevitably smaller than that in the prior art and cannot be equal to that in the prior art), and the unit air delivery flow area is insufficient if the evaluation index is too small, so that a large amount of refrigerating oil cannot smoothly flow back. Preferably, the evaluation index should be as large as possible, however, the limitation of the design space, the hollow area S cannot be increased without limitation, and increasing S inevitably causes the deterioration of the flange strength, further affects the connection strength and vibration transmission of the compressor, so that the vibration problem of the high-speed compressor is solved, the preferred range is given here, the lower limit of the evaluation index is limited, the unit flow area is not too small, the flow return is not smooth, the limitation of the design space and the structural strength are considered synchronously, and the preferred upper limit is provided, so that the flow return problem of the high-speed compressor is optimized.

In the present embodiment, the radius of the center circle corresponding to the return passage 121 is r ₀ The outer radius of the upper flange 12 is R, and the radial maximum width of the return channel 121 is w; wherein 1- (r) ₀ +0.5w)/R is not less than 0.05. Specifically, the upper flange 12 is adapted to be connected to the inner wall of the housing. By adopting the arrangement, the upper flange 12 and the to-be-connected piece can be guaranteed to be effectively optimized, so that the sufficient connection rigidity is conveniently guaranteed, and the effect of optimizing the vibration noise of the compressor is achieved.

Specifically, 1- (r0+0.5w)/r= [ R- (r0+0.5w) ]/r= (R-R1)/r=w1/R is greater than or equal to 0.05, W1 is a connection entity of the flange and the inner wall of the shell, and is a main transmission path of vibration noise of the compressor. For the high-speed compressor, the hollowed area S is required to be as large as possible, but cannot be increased without limitation due to the limitation of design space, and the increase of S inevitably causes the deterioration of the flange strength, so that the connection strength and vibration transmission of the compressor are affected, and the vibration problem of the high-speed compressor is caused. The lower limit value of the connection rigidity of the flange and the inner wall of the shell is limited by restraining the W1/R value, so that the problem of abnormal vibration noise of the high-speed compressor caused by insufficient connection rigidity is avoided.

Preferably, 1- (r0+0.5w)/R is equal to or greater than 0.07, so as to better ensure the connection strength and rigidity of the compressor.

Specifically, the upper flange 12 is welded with the piece to be connected; along the circumferential direction of the upper flange 12, the welding part of the upper flange 12 and the to-be-connected piece is arranged in a staggered manner with the distribution interval of the return channel 121. The above solution can also be understood as that the welding point 126 of the upper flange 12 is located on the solid portion of the upper flange 12, and the to-be-connected member is a housing. Therefore, the connection rigidity of the flange and the shell can be conveniently and effectively improved, and vibration noise of the compressor is reduced.

In this embodiment, the end of the slide slot 112 is provided with a tail hole 1121, the tail hole 1121 is a circular hole, and the diameter of the tail hole 1121 is d; the upper flange 12 is provided with a first avoiding hole 124 corresponding to the tail hole 1121, the first avoiding hole 124 is opposite to the tail hole 1121, the first avoiding hole 124 is a round hole, and the diameter of the first avoiding hole 124 is D; wherein D is not less than D and not more than d+0.5mm. By adopting the structural arrangement, the effective oil return flow area of the upper flange 12 can be maximized conveniently, and the rigidity of the upper flange 12 can be ensured.

Specifically, a first relief hole 124 is provided axially through the upper flange 12.

Preferably, the symmetry axis of the tail hole in the present embodiment is disposed coaxially with the symmetry axis of the first escape hole 124.

In the present embodiment, the cylinder 11 is provided with a process hole 115; along the circumferential direction of the cylinder 11, the distribution intervals of the process holes 115 and the return channels 121 are arranged in a staggered manner. With such a structural arrangement, it is possible to facilitate effective avoidance of the case where the strength of the cylinder 11 is weak due to the overlapping of the process hole 115 and the return passage 121 in the circumferential direction. It should be noted that, the above arrangement may be understood that there is no overlapping area between the return passage 121 and the solid portion of the cylinder 11 corresponding to the process hole 115.

Specifically, the upper flange 12 is provided with a second avoidance hole 125 opposite to the process hole 115, the process hole 115 and the second avoidance hole 125 are circular holes, the diameter of the process hole 115 is D1, and the diameter of the second avoidance hole 125 is D1. Wherein d1 is more than or equal to d1 and less than or equal to d1+0.5mm. By adopting the structural arrangement, the cylinder 11 is provided with the bulge 117, the process hole 115 is arranged on the bulge 117, and the rigidity of the upper flange 12 is ensured while the effective oil return flow area of the upper flange 12 is maximized under the condition that an ineffective backflow structure is caused by interference between the hollowed-out flow channel of the upper flange 12 and the bulge 117 where the process hole 115 of the cylinder 11 is positioned.

Specifically, the second relief hole 125 is disposed axially through the upper flange 12.

In the present embodiment, the return passage 121 includes a plurality of return holes 1211 provided at intervals along the circumferential direction of the upper flange 12, and the distance between two return holes 1211 at both ends of the plurality of return holes 1211 forms a distribution section of the return passage 121. When the return passage 121 includes the plurality of return holes 1211, the flow cross section of the return passage 121 is the sum of the flow cross sectional areas of the plurality of return holes 1211.

Fig. 7 is a schematic diagram illustrating structural rigidity simulation of the upper flange 12 in the present embodiment, and the upper flange 12 in the present embodiment and the upper flange in the prior art are applied to specific compressor models respectively corresponding to specific compressor operation conditions. According to comparison, compared with the upper flange in the prior art, the upper flange 12 provided by the application has the advantages that the oil return flow area is increased by 39.67%, the oil return amount is increased by 31.51%, the oil return effect is effectively optimized, and meanwhile, the rigidity of the flange is ensured to be basically equivalent (slightly reduced by 0.41%).

Specifically, the specific machine type is used as a carrier, and the test effect verification is carried out on the compressor oil circulation rate, noise and shell vibration near the upper flange under the high-frequency specific working condition. The results show that the pump body assembly and the compressor using the pump body assembly can effectively optimize the oil circulation rate, noise and shell vibration of the compressor.

A second embodiment of the present application provides a compressor including the pump body assembly 10 provided in the first embodiment. The compressor is a rolling rotor compressor, which may be a single cylinder, double cylinder, or multi-cylinder rotor compressor.

An embodiment III of the present application provides an air conditioner, including the compressor provided in the above embodiment II.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects: through last flange structural optimization design, when avoiding the invalid design of last flange backward flow passageway, ensure upper flange rigidity and backward flow passageway flow area to optimize compressor oil return passageway, ensure that backward flow frozen oil can in time smoothly flow to the oil sump, avoid compressor oil sump lack of oil, and cause the pump body oil supply not enough and lead to the reliability problem of friction pair spare part wearing and tearing, simultaneously, ensure upper flange rigidity, avoid causing compressor vibration noise problem because of upper flange rigidity is not enough.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (13)

1. A pump body assembly, comprising:

the air cylinder (11), the air cylinder (11) is provided with an air suction hole (111) and a sliding vane groove (112) at intervals;

an upper flange (12) arranged on the cylinder (11), wherein the upper flange (12) is positioned above the cylinder (11), a backflow channel (121) is arranged on the upper flange (12), the backflow channel (121) penetrates through the upper flange (12) along the axial direction of the upper flange (12), and the backflow channel (121) extends along the circumferential direction of the upper flange (12);

at least one of the air suction holes (111) and the sliding vane grooves (112) and the distribution interval of the return flow channels (121) are arranged in a staggered manner along the circumferential direction of the upper flange (12).

2. Pump body assembly according to claim 1, characterized in that the suction holes (111) and the slide slots (112) are arranged at intervals along the circumference of the cylinder (11);

along the circumferential direction of the upper flange (12), the distribution interval of the air suction holes (111) and the sliding vane grooves (112) and the distribution interval of the return channels (121) are arranged in a staggered mode.

3. Pump body assembly according to claim 1, characterized in that the cylinder (11) comprises a cylinder part (113) and a connecting part (114) which are connected with each other, the connecting part (114) being arranged protruding from the side of the cylinder part (113), the connecting part (114) being provided with the suction hole (111) and the slide groove (112), the connecting part (114) extending circumferentially along the cylinder part (113);

the connecting part (114) and the distribution interval of the return channel (121) are arranged in a staggered manner along the circumferential direction of the upper flange (12).

4. Pump body assembly according to claim 1, characterized in that the upper flange (12) comprises a flange body (122) and an exhaust valve seat (123) connected to each other; the exhaust valve seat (123) and the distribution section of the return passage (121) are arranged in a staggered manner along the circumferential direction of the upper flange (12).

5. Pump body assembly according to claim 1, characterized in that the displacement of the pump body assembly is V, the operating frequency of the pump body assembly is f, the flow area of the return channel (121) is S;

wherein S/(0.001 Vf) is less than or equal to 0.1 and less than or equal to 0.6.

6. Pump body assembly according to claim 1, characterized in that the radius of the corresponding central circle of the return channel (121) is R0, the outer radius of the upper flange (12) is R, the radial maximum width of the return channel (121) is w;

wherein 1- (r) ₀ +0.5w)/R≥0.05。

7. Pump body assembly according to claim 1, characterized in that the upper flange (12) is welded with the piece to be connected; along the circumference of the upper flange (12), the welding part of the upper flange (12) and the to-be-connected piece is arranged in a staggered manner with the distribution interval of the return channel (121).

8. Pump body assembly according to claim 1, characterized in that the end of the slide groove (112) is provided with a tail hole (1121), the tail hole (1121) is a circular hole, and the diameter of the tail hole (1121) is d; the upper flange (12) is provided with a first avoidance hole (124) corresponding to the tail hole (1121), the first avoidance hole (124) is opposite to the tail hole (1121), the first avoidance hole (124) is a round hole, and the diameter of the first avoidance hole (124) is D;

wherein D is not less than D and not more than d+0.5mm.

9. Pump body assembly according to claim 1, characterized in that the cylinder (11) is provided with a process hole (115); along the circumferential direction of the cylinder (11), the process holes (115) and the distribution interval of the return channel (121) are arranged in a staggered manner.

10. The pump body assembly according to claim 9, wherein a second avoidance hole (125) is formed on the upper flange (12) and is opposite to the process hole (115), the process hole (115) and the second avoidance hole (125) are circular holes, the diameter of the process hole (115) is D1, and the diameter of the second avoidance hole (125) is D1;

wherein d1 is more than or equal to d1 and less than or equal to d1+0.5mm.

11. Pump body assembly according to any one of claims 1 to 10, wherein the backflow channel (121) comprises a plurality of backflow holes (1211) arranged at intervals along the circumferential direction of the upper flange (12), the distance between two backflow holes (1211) at both ends of the plurality of backflow holes (1211) forming a distribution interval of the backflow channel (121).

12. A compressor comprising a pump body assembly according to any one of claims 1 to 11.

13. An air conditioner comprising the compressor of claim 12.