Non-return assembly, pump body structure and compressor

Abstract

The invention provides a non-return assembly, a pump body structure and a compressor, and the non-return assembly comprises a non-return structure and a non-return valve plate; the non-return structure is provided with an annular wall; the check valve plate is arranged on the annular wall in a sleeving manner and is used for covering the exhaust port of the pump body; when the exhaust port exhausts air, the check valve plate can be pushed by the exhausted air to be away from the exhaust port in the direction of the center line of the annular wall so as to open the exhaust port. When the exhaust port stops exhausting, the check valve plate can return to the exhaust port in the direction of the center line of the annular wall so as to cover the exhaust port; when the check valve plate moves in the direction of the center line of the annular wall, the annular wall can guide the check valve plate so as to limit the freedom degree of the check valve plate, the risk that the check valve plate inclines in the process of opening the exhaust port is reduced, and mechanical friction loss is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of check valves, and in particular relates to a check assembly, a pump body structure and a compressor. Background Art

[0002] The check valve structure is the most basic and important fluid control structure in all industries. In the compressor structure, the use of the check structure will affect the performance and energy efficiency of the compressor, and even affect the operation of the compressor. The check structure is mainly set between the pump body and the upper cover exhaust cavity in the exhaust path of the compressor system to prevent the mixed fluid of the refrigerant fluid and the oil fluid from flowing back in this path. Its dynamic characteristics have an important impact on the movement circuit of the entire oil and gas fluid.

[0003] At present, in the check structure of the traditional scroll compressor, the check structure is composed of a check valve seat and a check valve plate. One end of the check valve plate is fixed, and the other end is a free end. The free end of the check valve plate can be pushed up by the exhaust gas to open the exhaust port, or it can be lowered under the action of its own elastic force to close the exhaust port. A guide structure is provided on the check valve seat to guide the rise and fall of the free end of the check valve plate. Among them, the guide structure is a semi-closed structure extending along the circumference of the free end of the check valve plate. The semi-closed guide structure does not sufficiently restrict the free end of the check valve plate in the process of opening the exhaust port, so that the check valve plate is pushed by the exhaust gas in the process of opening the exhaust port. It is easy to tilt, thereby generating mechanical friction loss with the valve seat, affecting the reliability of the compressor. Summary of the invention

[0004] Therefore, the present invention provides a check assembly, a pump body structure and a compressor, the main technical problem to be solved is: how to reduce the risk of the check valve plate tilting during the process of opening the exhaust port and reduce mechanical friction loss.

[0005] In order to solve the above problems, the present invention provides a check assembly, which includes a check structure and a check valve plate; the check structure has an annular wall;

[0006] The check valve sheet is sleeved on the annular wall and is used to cover the exhaust port of the pump body; when the exhaust port is exhausted, the check valve sheet can be pushed by the exhaust gas to move away from the exhaust port along the center line direction of the annular wall to open the exhaust port; when the exhaust port stops exhausting, the check valve sheet can return to the exhaust port along the center line direction of the annular wall to cover the exhaust port;

[0007] Wherein, when the check valve plate moves along the center line direction of the annular wall, the annular wall can guide the check valve plate.

[0008] In some embodiments, the annular wall includes an annular inner wall and an annular outer wall sleeved on the annular inner wall, the centerline directions of the annular inner wall and the annular outer wall are parallel, and the centerline direction of the annular wall is the centerline direction of the annular inner wall or the centerline direction of the annular outer wall;

[0009] The check valve plate is annular and is sleeved between the annular inner wall and the annular outer wall; wherein, when the check valve plate moves along the center line direction of the annular wall, the annular wall guides the inner circumferential wall of the check valve plate through the annular inner wall, and the annular wall guides the outer circumferential wall of the check valve plate through the annular outer wall.

[0010] In some embodiments, the inner circumferential wall of the check valve plate is slidably matched with the annular inner wall at all locations in the circumferential direction;

[0011] And / or, the outer peripheral wall of the check valve plate is slidably matched with the annular outer wall at all locations in the circumferential direction.

[0012] In some embodiments, one end of the annular inner wall is used to be opposite to the middle area of ​​the exhaust port, and the check assembly also includes a diversion structure, which is used to divert the airflow flowing to the middle area uniformly along the circumferential direction to the annular area outside the middle area of ​​the exhaust port; wherein the check valve plate covers the exhaust port by covering the annular area, and the check valve plate opens the exhaust port by opening the annular area.

[0013] In some embodiments, the one end of the annular inner wall is a closed end, and the diversion structure includes a raised portion formed on the outer end surface of the closed end, and the raised portion gradually becomes thinner along the raised direction; the diversion structure evenly diverts the airflow flowing from the exhaust port to the middle area to the annular area through the outer surface of the raised portion.

[0014] In some embodiments, the projection contour of the closed end along the center line direction of the annular inner wall is circular, the outer surface of the raised portion is a revolution surface, and the center line of the raised portion coincides with the center line of the closed end.

[0015] In some embodiments, the check valve plate, the annular inner wall and the annular outer wall are all in annular shape, and the center lines of the three coincide with the center line of the raised portion.

[0016] In some embodiments, an annular cavity is formed between the annular inner wall and the annular outer wall, the annular cavity has an air outlet, and the exhaust port is used to exhaust air from the air outlet through the inside of the annular cavity when opened;

[0017] The air outlet is arranged on the annular inner wall, and the air outlet includes a first air outlet and a second air outlet, and the first air outlet and the second air outlet are opposite to each other, so that the fluids flowing out of the first air outlet and the second air outlet can collide with each other.

[0018] In some embodiments, when one end of the annular inner wall is a closed end, and the closed end is used to be opposite to the middle area of ​​the exhaust port, the other end of the annular inner wall is an open end, and the opening of the open end is connected with the first air outlet and the second air outlet through the inner space of the annular inner wall, so that the exhaust of the first air outlet and the second air outlet can be exhausted through the opening of the open end;

[0019] Wherein, an oil collecting groove is provided on the inner side of the closed end, and an oil return port is provided on the bottom of the oil collecting groove.

[0020] In some embodiments, the check valve plate has a first end and a second end opposite to each other; when the exhaust port exhausts gas, the check valve plate moves through the first end pushed by the exhaust gas;

[0021] Among them, the check assembly also includes an air return structure, which is used to introduce a part of the gas exhausted from the exhaust port into the second end side of the check valve plate when the exhaust port stops exhausting, so as to push the check valve plate to move, so that the check valve plate can return to the exhaust port along the center line direction of the annular wall.

[0022] In some embodiments, when the annular wall includes an annular inner wall and an annular outer wall sleeved on the annular inner wall, and the check valve plate is annular and sleeved between the annular inner wall and the annular outer wall, an annular cavity is formed between the annular inner wall and the annular outer wall, and the return air structure includes a return air port arranged on the cavity wall of the annular cavity, and the return air port is located on the second end side of the check valve plate; wherein, when the exhaust port stops exhausting, the return air structure introduces a portion of the gas discharged from the exhaust port into the second end side of the check valve plate through the return air port.

[0023] The present invention also provides a pump body structure, which includes any one of the check components described above.

[0024] In some embodiments, when the annular wall includes an annular inner wall and an annular outer wall sleeved on the annular inner wall, and an annular cavity is formed between the annular inner wall and the annular outer wall, the annular cavity has an air outlet, and the exhaust port is used to exhaust air from the air outlet through the inside of the annular cavity when opened, a connecting groove is provided on the end surface of the exhaust port, and when the check valve sheet is covered on the exhaust port, the connecting groove connects the inside of the exhaust port with the inside of the annular cavity.

[0025] In some embodiments, when the check assembly has an oil return port, the pump body of the pump body structure has an oil return passage for communicating with the oil pool of the compressor, and the oil return port is communicated with the oil return passage to return oil to the oil pool through the oil return passage.

[0026] The present invention also provides a compressor, which comprises the pump body structure described in any one of the above.

[0027] A check assembly, a pump body structure and a compressor provided by the present invention have the following beneficial effects:

[0028] 1. Since the annular wall of the present invention cooperates with the check valve disc to form a sleeve structure, the annular wall of the present invention is a closed guide structure surrounding the check valve disc. Compared with the semi-closed guide structure in the prior art, based on the same assembly gap, the closed guide structure of the present invention has a better guiding effect on the movement of the check valve disc, thereby reducing the risk of the check valve disc tilting during the movement along the center line direction of the annular wall, such as during the ascending process, and further reducing the mechanical friction loss caused by the tilt of the check valve disc.

[0029] 2. The diversion structure is set to evenly divert the exhaust gas from the exhaust port, so that the exhaust gas from the exhaust port can be evenly discharged from the annular area. When the check valve plate has a shape that matches the annular area, the even exhaust gas from the annular area acts on the check valve plate, which can make the force on the check valve plate more uniform. This can further prevent the check valve plate from tilting when it moves along the center line of the annular wall, and further reduce the mechanical friction loss caused by the tilt of the check valve plate.

[0030] 3. By making the fluid flowing out of the air outlet collide, the flow velocity of the fluid can be reduced, thereby reducing the air flow pulsation and suppressing the generation of aerodynamic noise.

[0031] 4. By setting up an oil collecting tank, oil droplets can be collected and returned to the oil pool of the compressor for reuse, thereby further reducing the oil circulation rate of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0033] Figure 1 is a structural schematic diagram of a non-return assembly provided by an embodiment of the present invention;

[0034] Figure 2It is an exploded perspective view of a non-return assembly and a fixed scroll provided by one embodiment of the present invention;

[0035] Figure 3 It is an exploded cross-sectional view of a non-return assembly and a fixed scroll provided by one embodiment of the present invention;

[0036] Figure 4 is a partial structural schematic diagram of a compressor provided by one embodiment of the present invention;

[0037] Figure 5 yes Figure 4 The enlarged schematic diagram of point A in the middle;

[0038] Figure 6 is a schematic diagram of another non-return structure provided by an embodiment of the present invention;

[0039] Figure 7 It is a working principle diagram of the exhaust silencer of the check assembly of the present invention;

[0040] Figure 8 It is a diagram showing the oil return working principle of the check assembly of the present invention.

[0041] The accompanying drawings are marked as follows:

[0042] 1. Intake pipe assembly; 2. Enthalpy increase pipe assembly; 3. Upper cover; 4. Shell; 5. Stationary scroll; 6. Moving scroll; 7. Bracket; 8. Check structure; 9. Check valve plate; 10. Oil return channel; 11. Pump body exhaust chamber; 51. Mounting groove; 80. Annular wall; 81. Annular cavity; 82. Inner space of annular inner wall; 83. Air outlet; 84. Raised part; 85. Oil return port; 86. Oil collecting tank; 8a. Closed end; 8b, open end; 83a, first air outlet; 83b, second air outlet; 9a, first end; 9b, second end; 91, outer peripheral wall; 92, inner peripheral wall; 10a, static plate oil return channel; 10b, circulation groove; 501, exhaust port; 501a, annular area; 801, annular outer wall; 802, annular inner wall; 803, end cover; 804, air return port; a, centerline direction of the annular wall. DETAILED DESCRIPTION

[0043] The following will be combined with the 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 described embodiments 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 by no means 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 creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the 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 devices or elements 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 contours of each component itself.

[0045] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0046] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0047] See also Figure 1-8 As shown, according to an embodiment of the present invention, a check assembly is provided, which includes a check structure 8 and a check valve plate 9. The check structure 8 has an annular wall 80. The check valve plate 9 is sleeved on the annular wall 80 and is used to cover the exhaust port 501 of the pump body. When the exhaust port 501 is exhausted, the check valve plate 9 can be pushed by the exhaust gas to move away from the exhaust port 501 along the center line direction a of the annular wall to open the exhaust port 501. When the exhaust port 501 stops exhausting, the check valve plate 9 can return to the exhaust port 501 along the center line direction a of the annular wall to cover the exhaust port 501. Among them, when the check valve plate 9 moves along the center line direction a of the annular wall, the annular wall 80 can guide the check valve plate 9.

[0048] It should be noted here that the smaller the assembly gap between the annular wall 80 and the check valve plate 9, the better the guiding effect of the annular wall 80 on the check valve plate 9; correspondingly, the larger the assembly gap between the annular wall 80 and the check valve plate 9, the worse the guiding effect of the annular wall 80 on the check valve plate 9.

[0049] In the above example, since the annular wall 80 of the present invention cooperates with the check valve plate 9 to form a sleeve structure, the annular wall 80 of the present invention is a closed guide structure surrounding the check valve plate 9. Compared with the semi-closed guide structure in the prior art, based on the same assembly clearance, the closed guide structure of the present invention has a better guiding effect on the movement of the check valve plate 9, thereby reducing the risk of the check valve plate 9 tilting during the movement along the centerline direction a of the annular wall, such as during the ascending process, and further reducing the mechanical friction loss caused by the tilt of the check valve plate 9.

[0050] In some embodiments, Figure 1-Figure 5 As shown, the aforementioned annular wall 80 may include an annular inner wall 802 and an annular outer wall 801 sleeved on the annular inner wall 802. The centerline directions of the annular inner wall 802 and the annular outer wall 801 are parallel. The centerline direction a of the aforementioned annular wall is the centerline direction of the annular inner wall 802 or the centerline direction of the annular outer wall 801. The aforementioned check valve plate 9 is annular, and the check valve plate 9 is sleeved between the annular inner wall 802 and the annular outer wall 801. Among them, when the check valve plate 9 moves along the centerline direction a of the annular wall, the annular wall 80 guides the inner peripheral wall 92 of the check valve plate through the annular inner wall 802, and the annular wall 80 guides the outer peripheral wall 91 of the check valve plate through the annular outer wall 801.

[0051] In the above example, when the check valve plate 9 moves along the center line direction a of the annular wall, the annular inner wall 802 and the annular outer wall 801 cooperate with each other to guide the inner circumferential wall 92 and the outer circumferential wall 91 of the check valve plate at the same time, thereby further improving the position limitation of the check valve plate 9, further limiting the degree of freedom of the check valve plate 9, and further reducing the risk of the check valve plate 9 tilting during the movement along the center line direction a of the annular wall, thereby further reducing the mechanical friction loss caused by the tilt of the check valve plate 9.

[0052] In order to allow the annular inner wall 802 to guide the inner circumferential wall 92 of the check valve plate, in some embodiments, the inner circumferential wall 92 of the check valve plate may be slidably matched with the annular inner wall 802 at all locations in the circumferential direction.

[0053] In order to allow the annular outer wall 801 to guide the outer peripheral wall 91 of the check valve plate, in some embodiments, the outer peripheral wall 91 of the check valve plate may be slidably matched with the annular outer wall 801 at all locations in the circumferential direction.

[0054] In some embodiments, Figure 4-5 As shown, one end of the aforementioned annular inner wall 802 is used to be opposite to the middle area of ​​the exhaust port 501. The aforementioned non-return assembly also includes a flow diversion structure, which is used to evenly divert the airflow flowing to the middle area of ​​the exhaust port 501 to the annular area 501a outside the middle area of ​​the exhaust port 501 along the circumferential direction. The non-return valve plate 9 covers the exhaust port 501 by covering the annular area 501a, and the non-return valve plate 9 opens the exhaust port 501 by opening the annular area 501a.

[0055] In the above example, the exhaust gas from the exhaust port 501 can be evenly diverted by the diversion structure, so that the exhaust gas from the exhaust port 501 can be evenly discharged from the annular area 501a. When the check valve plate 9 has a shape that matches the annular area 501a, the uniform exhaust gas from the annular area 501a acts on the check valve plate 9, which can make the force on the check valve plate 9 more uniform. This can further reduce the risk of the check valve plate 9 tilting when moving along the center line direction a of the annular wall, and further reduce the mechanical friction loss caused by the tilt of the check valve plate 9.

[0056] In order to realize the function of the above-mentioned shunt structure, in some embodiments, as Figure 4-5 As shown, one end of the aforementioned annular inner wall 802 may be a closed end 8a, and the aforementioned flow-dividing structure includes a protrusion 84 formed on the outer end surface of the closed end 8a. The protrusion 84 gradually tapers along the protruding direction. The flow-dividing structure evenly diverts the airflow flowing to the middle area in the exhaust port 501 to the aforementioned annular area 501a through the outer surface of the protrusion 84.

[0057] In the above example, the flow diversion is achieved by the protrusion 84 which gradually becomes thinner along the protrusion direction, and the structure is relatively simple and convenient to process.

[0058] In a specific application example, Figure 4-5 As shown, the projection profile of the aforementioned closed end 8a along the center line direction of the annular inner wall 802 is circular. The outer surface of the aforementioned raised portion 84 is a revolving surface, for example, the outer surface of the raised portion 84 can be a conical inclined surface or a hemispherical surface. The center line of the raised portion 84 coincides with the center line of the closed end 8a, so when the aforementioned check assembly is applied to a pump body structure having a circular exhaust port 501, the raised portion 84 can be directly opposite to the middle area of ​​the circular exhaust port 501, and the center line of the raised portion 84 coincides with the center line of the circular exhaust port 501, so that the annular area 501a outside the middle area of ​​the exhaust port 501 can form a circular annular area. Because the outer surface of the raised portion 84 is a revolving surface, the outer surface of the raised portion 84 can evenly divert the airflow in the middle area of ​​the exhaust port 501 to the annular area 501a along the circumferential direction, so that the annular area 501a can be evenly exhausted along the circumferential direction.

[0059] Further, such as Figure 4-5 As shown, the aforementioned check valve plate 9, the annular inner wall 802 and the annular outer wall 801 are all in annular shape, and the center lines of the three coincide with the center line of the protrusion 84. In this way, when the check structure of the present invention is applied to the circular exhaust port 501, the center lines of the check valve plate 9, the annular inner wall 802, the annular outer wall 801 and the protrusion 84 can coincide with the center line of the exhaust port 501. When the annular check valve plate 9 covers the annular area 501a of the exhaust port 501, the uniform exhaust of the annular area 501a along the circumferential direction acts on the annular check valve plate 9, which can make the force on the check valve plate 9 more uniform, thereby further reducing the risk of the check valve plate 9 tilting when moving along the center line direction a of the annular wall, and further reducing the mechanical friction loss caused by the tilt of the check valve plate 9.

[0060] In some embodiments, Figure 5 As shown, an annular cavity 81 is formed between the annular inner wall 802 and the annular outer wall 801. The annular cavity 81 has an air outlet 83, and the exhaust port 501 is used to exhaust air from the air outlet 83 through the inside of the annular cavity 81 when it is opened. Figure 7 As shown, the air outlet 83 is disposed on the annular inner wall 802, and includes a first air outlet 83a and a second air outlet 83b. The first air outlet 83a and the second air outlet 83b are opposite to each other, so that the fluids flowing out of the first air outlet 83a and the second air outlet 83b can collide.

[0061] In the above example, when the fluids flowing out of the first air outlet 83a and the second air outlet 83b collide, the flow velocity of the fluids can be reduced, thereby reducing the air flow pulsation and suppressing the generation of aerodynamic noise.

[0062] In some embodiments, the first air outlet 83a and the second air outlet 83b form an air outlet group, and the number of the air outlet groups may be more than two, and they are evenly arranged around the center line of the annular inner wall 802. Among them, a larger number of air outlet groups can improve the impact efficiency of the fluid, thereby further reducing the flow rate of the fluid, which is conducive to further reducing the air flow pulsation and suppressing the generation of aerodynamic noise.

[0063] It should be noted here that: when the check structure 8 of the present invention has the first air outlet 83a, the second air outlet 83b and the diversion structure at the same time, the diversion structure can evenly divert the exhaust gas from the exhaust port 501 to the annular area 501a outside the middle area of ​​the exhaust port 501, and the annular area 501a can evenly pass the exhaust gas into the annular cavity 81 along the circumferential direction, so that the exhaust pressure in the annular cavity 81 can be more uniform. Among them, the more uniform exhaust pressure in the annular cavity 81 is conducive to the first air outlet 83a and the second air outlet 83b to form counter-flows with equal speed and opposite directions. The counter-flows meet and collide in the inner space 82 of the annular inner wall 802, thereby reducing the airflow velocity, reducing airflow pulsation, and suppressing noise generation.

[0064] In some embodiments, Figure 5 As shown, when one end of the annular inner wall 802 is a closed end 8a, and the closed end 8a is used to be opposite to the middle area of ​​the exhaust port 501, the other end of the annular inner wall 802 is an open end 8b, and the opening of the open end 8b is connected with the first air outlet 83a and the second air outlet 83b through the inner space 82 of the annular inner wall, so that the exhaust of the first air outlet 83a and the second air outlet 83b can be exhausted through the opening of the open end 8b.

[0065] In the above example, the exhaust gas from the exhaust port 501 can be discharged sequentially through the inside of the annular cavity 81, the exhaust port 83, the inner space 82 of the annular inner wall, and the opening of the open end 8b of the annular inner wall.

[0066] In some embodiments, Figure 5 As shown, the inner side of the closed end 8 a may have an oil collecting groove 86 , and the bottom of the oil collecting groove 86 has an oil return port 85 .

[0067] In the above example, when the airflows of each air outlet group collide in the inner cavity of the annular inner wall 802, part of the oil fluid will gather into small oil droplets due to collision and fall into the oil collecting tank 86. The oil collecting tank 86 can return the collected oil droplets to the oil pool of the compressor for reuse through the oil return port 85 at the bottom, thereby further reducing the oil circulation rate of the compressor.

[0068] In some embodiments, Figure 5 As shown, the closed end 8a may be formed with the protrusion 84 on its outer side by protruding outward, and the oil collecting groove 86 may be formed on its inner side, and the groove wall of the oil collecting groove 86 has a shape consistent with the outer surface of the protrusion 84. The protrusion 84 may be a conical structure or a hemispherical structure, so that the outer surface of the protrusion 84 is a conical inclined surface or a hemispherical surface.

[0069] In order to realize the function that the check valve plate 9 can return to the exhaust port 501 along the center line direction a of the annular wall when the exhaust port 501 stops exhausting, in some embodiments, as Figure 1 As shown, the aforementioned check valve plate 9 has a first end 9a and a second end 9b opposite to each other. When the exhaust port 501 is exhausted, the check valve plate 9 is pushed by the exhaust gas through the first end 9a to move. The check assembly also includes a return gas structure, which is used to introduce a part of the gas exhausted from the exhaust port 501 into the second end 9b side of the check valve plate 9 when the exhaust port 501 stops exhausting, so as to push the check valve plate 9 to move, so that the check valve plate 9 can return to the exhaust port 501 along the center line direction a of the annular wall.

[0070] In the above example, when the exhaust port 501 stops exhausting, the pressure in the exhaust port 501 decreases, and the return air structure introduces a portion of the high-pressure gas discharged from the exhaust port 501 into the second end 9b side of the check valve plate 9. Through the pressure difference, the check valve plate 9 can be pushed back to the exhaust port 501 along the center line direction a of the annular wall, so that the exhaust port 501 covers the exhaust port 501.

[0071] In order to realize the function of the aforementioned air return structure, in some embodiments, as Figure 1 As shown, when the aforementioned annular wall 80 includes an annular inner wall 802 and an annular outer wall 801 sleeved on the annular inner wall 802, and the check valve plate 9 is annular and sleeved between the annular inner wall 802 and the annular outer wall 801, an annular cavity 81 is formed between the annular inner wall 802 and the annular outer wall 801. Figure 7 As shown, the aforementioned air return structure may include an air return port 804 disposed on the cavity wall of the annular cavity 81, and the air return port 804 is located on the second end 9b side of the check valve plate 9. When the exhaust port 501 stops exhausting, the air return structure introduces a portion of the exhaust gas from the exhaust port 501 into the second end 9b side of the check valve plate 9 through the air return port 804.

[0072] In the above example, when the check assembly of the present invention is applied to the compressor, when the exhaust port 501 stops exhausting, the pressure inside the exhaust port 501 will decrease rapidly, while the exhaust pressure discharged from the exhaust port 501 to the upper chamber of the compressor is still relatively high, so that there is a large pressure difference between the two. In this way, the exhaust gas with a higher pressure in the upper chamber of the compressor will automatically flow back to the return port 804, thereby achieving the purpose of the return structure to introduce a part of the gas discharged from the exhaust port 501 into the second end 9b side of the check valve plate 9.

[0073] In some embodiments, Figure 1-2As shown, the aforementioned annular cavity 81 has an end cover portion 803 on the second end 9b side of the check valve plate 9, and the end cover portion 803 is used to stop and limit the check valve plate 9 when the check valve plate 9 moves to the limit position in the direction away from the exhaust port 501. The aforementioned return port 804 can be arranged on the end cover portion 803.

[0074] Among them, since the check valve plate 9 abuts against the end cover portion 803 when it moves in the direction away from the exhaust port 501 to the extreme position, and by setting the return air port 804 on the end cover portion 803, the return air port 804 can be made to face the second end 9b of the check valve plate 9, which is conducive to the return air of the return air port 804 pushing the second end 9b of the check valve plate 9, so that the check valve plate 9 returns to the exhaust port 501.

[0075] The present invention also provides a pump body structure, which can include any of the above-mentioned check assemblies. Among them, because the pump body structure adopts the above-mentioned check assembly, the annular wall 80 cooperates with the check valve plate 9 to form a sleeve-type structure. When the check valve plate 9 moves along the center line direction a of the annular wall, the annular wall 80 can limit the check valve plate 9 by guiding the movement of the check valve plate 9, so as to limit the degree of freedom of the check valve plate 9 and prevent the check valve plate 9 from tilting during the movement along the center line direction a of the annular wall, thereby reducing the mechanical friction loss caused by the tilt of the check valve plate 9.

[0076] In some embodiments, when the annular wall 80 includes an annular inner wall 802 and an annular outer wall 801 sleeved on the annular inner wall 802, and an annular cavity 81 is formed between the annular inner wall 802 and the annular outer wall 801, the annular cavity 81 has an air outlet 83, and the exhaust port 501 is used to exhaust air from the air outlet 83 through the inside of the annular cavity 81 when opened, a connecting groove may be provided on the end surface of the exhaust port 501, and when the check valve plate 9 covers the exhaust port 501, the connecting groove connects the inside of the exhaust port 501 with the inside of the annular cavity 81.

[0077] In the above example, the connecting groove is designed to connect the inside of the exhaust port 501 with the inside of the annular cavity 81. The purpose of such design is twofold: 1. to prevent the check valve plate 9 from being damaged easily due to excessive pressure difference between the inside and outside of the check valve plate 9; 2. to weaken the excessive fit between the check valve plate 9 and the end surface of the exhaust port 501, so that the check valve plate 9 is easier to rise.

[0078] In some embodiments, Figure 5 As shown, when the check assembly has an oil return port 85, the pump body of the pump body structure has an oil return channel 10 for communicating with the oil pool of the compressor, and the oil return port 85 is connected to the oil return channel 10 to return oil to the oil pool through the oil return channel 10, which can further reduce the oil circulation rate and improve the compressor performance.

[0079] In some embodiments, Figure 4 As shown, the aforementioned pump body is a scroll compressor pump body, which has a static scroll plate 5 and a bracket 7, and the aforementioned oil return channel 10 includes a static plate oil return channel 10a arranged on the static scroll plate 5 and a flow groove 10b arranged on the bracket 7, and the static plate oil return channel 10a is connected with the flow groove 10b, and the static plate oil return channel 10a is connected with the oil pool through the flow groove 10b. Among them, the oil return channel 10 is connected with the oil return port 85 through the end of the static plate oil return channel 10a that is away from the flow groove 10b. It should be noted here that: in some embodiments, the above-mentioned bracket 7 is an upper bracket of the pump body.

[0080] In the above example, due to the influence of the pressure difference, the accumulated oil in the check assembly can flow out from the oil return port 85 to the stator oil return channel 10a, then flow to the flow groove 10b on the bracket 7, and then flow back to the oil pool, which can further reduce the oil circulation rate and improve the compressor performance.

[0081] In some embodiments, Figure 3-4 As shown, the pump body of the pump body structure may be provided with a mounting groove 51, and the exhaust port 501 is provided on the bottom surface of the mounting groove 51. The check structure 8 may be sleeved in the mounting groove 51 through an annular outer wall 801. The annular outer wall 801 may be interference fit with the groove wall of the mounting groove 51, so that the two may be tightly fixed.

[0082] In some embodiments, the present invention further provides a compressor, which may include any of the above pump body structures. In particular, because the compressor adopts the above pump body structure, the annular wall 80 cooperates with the check valve plate 9 to form a sleeve structure, and when the check valve plate 9 moves along the center line direction a of the annular wall, the annular wall 80 can limit the check valve plate 9 by guiding the movement of the check valve plate 9, so as to limit the degree of freedom of the check valve plate 9 and prevent the check valve plate 9 from tilting during the movement along the center line direction a of the annular wall, thereby reducing the mechanical friction loss caused by the tilt of the check valve plate 9.

[0083] In some embodiments, Figure 4 As shown, the aforementioned compressor includes an air intake pipe assembly 1, an enthalpy increasing pipe assembly 2, an upper cover 3, a housing 4, a fixed scroll 5, a movable scroll 6, a bracket 7, a fixed scroll oil return passage 10a, and a pump body exhaust chamber 11. When the compressor is running, the refrigerant fluid enters the pump body of the compressor through the air intake pipe assembly 1 and mixes with the oil fluid, and then enters the pump body exhaust chamber 11 after being compressed into oil-gas fluid by the fixed scroll 5 and the movable scroll 6 and discharged to the chamber inside the upper cover 3.

[0084] Among them, when the aforementioned check structure 8 has an annular outer wall 801 and an annular inner wall 802, and the check valve plate 9 is sleeved between the annular outer wall 801 and the annular inner wall 802, and the aforementioned air outlet 83 is arranged on the annular inner wall 802, an annular cavity 81 is formed between the annular outer wall 801 and the annular inner wall 802. After the oil and gas fluid is discharged from the pump body exhaust cavity 11, it first enters the annular cavity 81, and then enters the inner space 82 of the annular inner wall through the inside of the annular cavity 81 through the air outlet 83 for offset, and then is discharged to the chamber inside the upper cover.

[0085] Figure 7 This is a working principle diagram of the exhaust silencer of the embodiment of the present invention. From the flow path of the oil and gas fluid, the compressed oil and gas fluid gathers in the exhaust chamber 11 of the pump body, then is discharged upward, and then is evenly diverted by the diversion structure in the check structure 8, and flows into the annular chamber 81; the diverted oil and gas flows from the annular area 501a outside the middle area of ​​the exhaust port 501 to the annular chamber 81. Since the check valve plate 9 covers the annular area 501a, the oil and gas fluid pushes the check valve plate 9 to move upward along the annular inner wall 802 and the annular outer wall 801 to the end cover 803 at the top of the check structure 8 during the flow of the oil and gas into the annular chamber 81. Among them, the annular inner wall 802 is slidably matched with the inner circumferential wall 92 of the check valve plate at all points in the circumferential direction, and the annular outer wall 801 is slidably matched with the outer circumferential wall 91 of the check valve plate at all points in the circumferential direction. Both the annular inner wall 802 and the annular outer wall 801 can be circular ring walls 80. The cooperation between the annular inner wall 802 and the annular outer wall 801 can more effectively limit the annular check valve plate 9 to prevent it from tilting during the rising process. Then, the oil and gas fluid enters the inner space 82 of the annular inner wall 802 through the air outlet 83 to collide with each other, so that the flow rate of the oil and gas fluid can be reduced during the exhaust process, the air flow pulsation can be reduced, and the effect of suppressing the generation of aerodynamic noise can be achieved.

[0086] Figure 8 The diagram is a diagram of the oil return working principle of an embodiment of the present invention. According to the above exhaust silencer working principle, the oil and gas fluids collide in the inner space 82 of the annular inner wall. Due to the collision of the fluids, some oil droplets will be generated and drip into the oil collecting groove 86 at the bottom of the inner side of the closed end 8a of the annular inner wall. The bottom of the oil collecting groove 86 has an oil return port 85, which is connected to the oil return channel 10a of the static plate. Due to the influence of the pressure difference, the accumulated oil in the check structure 8 will flow along the oil return channel 10a of the static plate to the flow groove 10b on the bracket 7, and then flow back to the oil pool, which can further reduce the oil circulation rate and improve the performance of the compressor.

[0087] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0088] The above description is only 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 principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A non-return assembly, characterized in that: It comprises a check structure (8) and a check valve plate (9); the check structure (8) has an annular wall (80); The check valve plate (9) is sleeved on the annular wall (80) and is used to cover the exhaust port (501) of the pump body; when the exhaust port (501) is exhausted, the check valve plate (9) can be pushed by the exhaust gas to move away from the exhaust port (501) along the center line direction (a) of the annular wall to open the exhaust port (501); when the exhaust port (501) stops exhausting, the check valve plate (9) can return to the exhaust port (501) along the center line direction (a) of the annular wall to cover the exhaust port (501); Wherein, when the check valve plate (9) moves along the center line direction (a) of the annular wall, the annular wall (80) can guide the check valve plate (9).

2. The check assembly according to claim 1, characterized in that: The annular wall (80) comprises an annular inner wall (802) and an annular outer wall (801) sleeved on the annular inner wall (802), the centerline directions of the annular inner wall (802) and the annular outer wall (801) are parallel, and the centerline direction (a) of the annular wall is the centerline direction of the annular inner wall (802) or the centerline direction of the annular outer wall (801); The check valve plate (9) is annular and is sleeved between the annular inner wall (802) and the annular outer wall (801); wherein, when the check valve plate (9) moves along the center line direction (a) of the annular wall, the annular wall (80) guides the inner circumferential wall (92) of the check valve plate via the annular inner wall (802), and the annular wall (80) guides the outer circumferential wall (91) of the check valve plate via the annular outer wall (801).

3. The non-return assembly according to claim 2, characterized in that: The inner peripheral wall (92) of the check valve plate is slidably matched with the annular inner wall (802) at all locations in the circumferential direction; And / or, the outer peripheral wall (91) of the check valve plate is slidably matched with the annular outer wall (801) at all locations in the circumferential direction.

4. The non-return assembly according to claim 2 or 3, characterized in that: One end of the annular inner wall (802) is used to be opposite to the middle area of ​​the exhaust port (501), and the non-return assembly also includes a diversion structure, which is used to evenly divert the airflow flowing to the middle area to the annular area (501a) outside the middle area of ​​the exhaust port (501) along the circumferential direction; wherein the non-return valve plate (9) covers the exhaust port (501) by covering the annular area (501a), and the non-return valve plate (9) opens the exhaust port (501) by opening the annular area (501a).

5. The non-return assembly according to claim 4, characterized in that: The one end of the annular inner wall (802) is a closed end (8a), and the diversion structure includes a protrusion (84) formed on the outer end surface of the closed end (8a), and the protrusion (84) gradually becomes thinner along the protrusion direction; the diversion structure evenly diverts the airflow flowing from the exhaust port (501) to the middle area to the annular area (501a) through the outer surface of the protrusion (84).

6. The non-return assembly according to claim 5, characterized in that: The projection profile of the closed end (8a) along the center line direction of the annular inner wall (802) is circular, the outer surface of the raised portion (84) is a revolving surface, and the center line of the raised portion (84) coincides with the center line of the closed end (8a).

7. The non-return assembly according to claim 6, characterized in that: The check valve plate (9), the annular inner wall (802) and the annular outer wall (801) are all in annular shape, and the center lines of the three coincide with the center line of the raised portion (84).

8. The non-return assembly according to any one of claims 2-3 and 5-7, characterized in that: An annular cavity (81) is formed between the annular inner wall (802) and the annular outer wall (801), the annular cavity (81) having an air outlet (83), and the air outlet (501) is used to exhaust air from the air outlet (83) through the inside of the annular cavity (81) when opened; Wherein, the air outlet (83) is arranged on the annular inner wall (802), and the air outlet (83) includes a first air outlet (83a) and a second air outlet (83b), and the first air outlet (83a) and the second air outlet (83b) are opposite to each other, so that the fluids flowing out of the first air outlet (83a) and the second air outlet (83b) can collide with each other.

9. The non-return assembly according to claim 8, characterized in that: When one end of the annular inner wall (802) is a closed end (8a), and the closed end (8a) is used to be opposite to the middle area of ​​the exhaust port (501), the other end of the annular inner wall (802) is an open end (8b), and the opening of the open end (8b) is connected with the first air outlet (83a) and the second air outlet (83b) through the inner space (82) of the annular inner wall, so that the exhaust of the first air outlet (83a) and the second air outlet (83b) can be exhausted through the opening of the open end (8b); The inner side of the closed end (8a) is provided with an oil collecting groove (86), and the bottom of the oil collecting groove (86) is provided with an oil return port (85).

10. The non-return assembly according to any one of claims 1-3, 5-7, and 9, characterized in that: The check valve plate (9) has a first end (9a) and a second end (9b) that are opposite to each other; when the exhaust port (501) exhausts air, the check valve plate (9) moves through the first end (9a) under the push of the exhaust gas; The check assembly further comprises an air return structure, which is used to introduce a portion of the gas exhausted from the exhaust port (501) into the second end (9b) side of the check valve plate (9) when the exhaust port (501) stops exhausting, so as to push the check valve plate (9) to move, so that the check valve plate (9) can return to the exhaust port (501) along the center line direction (a) of the annular wall.

11. The check assembly according to claim 10, characterized in that: When the annular wall (80) comprises an annular inner wall (802) and an annular outer wall (801) sleeved on the annular inner wall (802), and the check valve plate (9) is annular and sleeved between the annular inner wall (802) and the annular outer wall (801), an annular cavity (81) is formed between the annular inner wall (802) and the annular outer wall (801), and the air return structure comprises an air return port (804) arranged on the cavity wall of the annular cavity (81), and the air return port (804) is located on the second end (9b) side of the check valve plate (9); wherein, when the exhaust port (501) stops exhausting, the air return structure introduces a portion of the gas exhausted from the exhaust port (501) into the second end (9b) side of the check valve plate (9) through the air return port (804).

12. A pump structure, characterized in that: The invention comprises the non-return assembly according to any one of claims 1 to 11.

13. The pump structure according to claim 12, characterized in that: When the annular wall (80) comprises an annular inner wall (802) and an annular outer wall (801) sleeved on the annular inner wall (802), and an annular cavity (81) is formed between the annular inner wall (802) and the annular outer wall (801), the annular cavity (81) has an air outlet (83), and the exhaust port (501) is used to exhaust air from the air outlet (83) through the inside of the annular cavity (81) when opened, a connecting groove is provided on the end surface of the exhaust port (501), and when the check valve plate (9) covers the exhaust port (501), the connecting groove connects the inside of the exhaust port (501) with the inside of the annular cavity (81).

14. The pump structure according to claim 12 or 13, characterized in that: When the check assembly has an oil return port (85), the pump body of the pump body structure has an oil return passage (10) for communicating with the oil pool of the compressor, and the oil return port (85) is communicated with the oil return passage (10) to return oil to the oil pool through the oil return passage (10).

15. A compressor, characterized in that: The invention comprises the pump body structure according to any one of claims 12 to 14.

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