Fixed scroll plate with exhaust non-return function, pump body assembly and scroll compressor

Abstract

The invention provides a fixed scroll plate with an exhaust non-return function, a pump body assembly and a scroll compressor, and belongs to the technical field of compressors. According to the scroll compressor, the buffering structure is arranged, the impact force generated when the check valve plate moves downwards is relieved, abrasion and impact of the check valve plate can be effectively reduced, and therefore the durability of the check valve plate and the reliability of the whole scroll compressor are improved. Due to the buffer structure, the hard contact of the check valve plate during up-and-down movement is reduced, so that the noise generated by collision is reduced, and the operation environment of the scroll compressor is improved. The check valve plate can automatically open or close the exhaust hole according to the pressure change of the refrigerant, it is ensured that the high-pressure refrigerant can be smoothly exhausted during exhausting, the refrigerant can be prevented from flowing reversely when exhausting is stopped, and the exhaust efficiency and the overall performance of the compressor can be improved. The effective exhaust non-return function can prevent unnecessary leakage of refrigerants, energy loss is reduced, and therefore the energy efficiency of the whole system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a fixed scroll plate with an exhaust check function, a pump body assembly and a scroll compressor. Background Art

[0002] The scroll compressor consists of a sealed shell, a fixed scroll, a movable scroll, a bracket, an eccentric crankshaft, an anti-rotation mechanism and a motor. The profiles of the movable and fixed scrolls are both spiral. The movable scroll is eccentric to the fixed scroll and installed 180° apart, so multiple crescent-shaped spaces are formed between the movable and fixed scrolls. The movable scroll rotates with the center of the fixed scroll as the center and rotates at a certain rotation eccentric radius without self-rotation. The outer crescent-shaped space moves continuously toward the center. At this time, the refrigerant is gradually pushed toward the center space, and its volume continues to shrink while the pressure continues to increase until it is connected to the central exhaust hole, and the high-pressure refrigerant is discharged from the pump body.

[0003] When the scroll compressor stops, the high-pressure refrigerant on the exhaust side will flow back to the suction side, causing reverse noise and even damage to the pump structure. Therefore, scroll compressors are equipped with an anti-reverse mechanism, which is usually a set of one-way check valves. Currently, scroll compressors are developing towards high speed and large displacement, and often operate under conditions with a large pressure difference between the discharge pressure and the suction pressure. Under this condition, the one-way check valve plate repeatedly hits the pump body and the baffle, which is prone to valve plate breakage. Summary of the invention

[0004] The embodiments of the present application provide a fixed scroll plate, a pump body assembly and a scroll compressor with an exhaust check function, which can reduce the impact force of the check valve plate when it moves downward by setting a buffer structure between the check valve plate and the back of the end plate, thereby effectively protecting the check valve plate and avoiding the check valve plate from breaking. Specifically:

[0005] In a first aspect of an embodiment of the present application, a fixed scroll with an exhaust check function is provided, which is used to cooperate with a movable scroll of a scroll compressor, and the fixed scroll includes:

[0006] An end plate, the end plate having a front side facing the movable scroll and a back side opposite to the front side, a fixed scroll tooth is arranged on the front side of the end plate, and an exhaust hole penetrating the front side and the back side is also arranged on the end plate;

[0007] An exhaust check device, the exhaust check device is installed on the back of the end plate, the exhaust check device includes a check valve seat fixed on the back of the end plate and a check valve plate installed in the check valve seat, the check valve plate is arranged corresponding to the exhaust hole and can move up and down relative to the check valve seat to open or close the exhaust hole, wherein when the exhaust hole is exhausted, the check valve plate can move upward under the upward push of the refrigerant to open the exhaust hole, and when the exhaust hole stops exhausting, the check valve plate can move downward under the downward push of the refrigerant to close the exhaust hole;

[0008] The exhaust check device also includes a buffer structure arranged between the check valve plate and the back of the end plate, and the buffer structure is used to cooperate with the check valve plate when the check valve plate moves downward to reduce the impact force of the check valve plate when it moves downward.

[0009] In the above technical solution, the buffer structure includes a buffer member fixed on the back of the end plate, the buffer member includes a lower mating surface fixedly matched with the back of the end plate and an upper mating surface opposite to the lower mating surface, and an air outlet hole penetrating the upper mating surface and the lower mating surface is formed on the buffer member;

[0010] The air outlet hole is arranged corresponding to the exhaust hole on the end plate and an air flow channel is formed between the two. When the check valve plate moves downward, the check valve plate can cooperate with the upper mating surface of the buffer component and seal the air outlet hole of the buffer component to close the air flow channel formed by the air outlet hole and the exhaust hole.

[0011] In the above technical solution, the buffer member includes a disc spring fixedly arranged on the back of the end plate, and the disc spring is formed with a lower mating surface with a large diameter and an upper mating surface with a small diameter in the compression direction thereof;

[0012] When the disc spring is matched with the back of the end plate through the lower matching surface with a large diameter, a compression cavity is formed between the inner cavity of the disc spring and the back of the end plate.

[0013] In the above technical solution, a first mounting surface and a second mounting surface are formed on the back of the end plate and are located at the periphery of the exhaust hole and are stepped. The first mounting surface is arranged away from the exhaust hole relative to the second mounting surface. A threaded hole is formed on the first mounting surface, and a mounting hole corresponding to the threaded hole is formed on the check valve seat. The check valve seat is fixed to the first mounting surface of the end plate by positioning bolts passing through the mounting hole and the threaded hole, wherein a part of the bottom end of the check valve seat is interference-fitted with the first mounting surface, and the other part is clearance-fitted with the second mounting surface to form an embedded area;

[0014] The outer periphery of the disc spring is also formed with an annular conical transition surface between the upper mating surface and the lower mating surface, and an annular pressing surface is also formed between the bottom end of the annular conical transition surface and the outer periphery of the lower mating surface;

[0015] At least a portion of the annular pressing surface is embedded in the embedding area and is interference-fitted with the second mounting surface on the end plate and the bottom end surface of the check valve seat.

[0016] In the above technical solution, the central axis of the air outlet of the buffer component coincides with the central axis of the exhaust hole on the end plate, and the aperture of the air outlet is greater than or equal to the aperture of the exhaust hole.

[0017] In the above technical solution, the check valve seat includes a seat body, and a connecting column connected to the bottom of the seat body and extending downward, the seat body is fixed to the back of the end plate through the connecting column, a plurality of connecting columns are provided, and the plurality of connecting columns are circumferentially distributed at the bottom of the seat body, and an airflow cavity connected to the exhaust cavity of the scroll compressor is defined between the seat body, the plurality of connecting columns and the back of the end plate;

[0018] When the exhaust hole is exhausted, the check valve plate can move upward under the upward push of the refrigerant to open the exhaust hole, and discharge into the exhaust chamber of the scroll compressor through the air flow cavity. When the exhaust hole stops exhausting, the refrigerant in the exhaust chamber can flow back to the check valve plate and push the check valve plate downward to close the exhaust hole through the check valve plate.

[0019] In the above technical solution, a limited position structure is formed between the check valve seat and the check valve plate;

[0020] When the check valve plate moves up and down, the limiting structure can reduce the rotational freedom of the check valve plate when it moves up and down.

[0021] In the above technical solution, the check valve seat includes a seat body and a plurality of connecting columns connected to the bottom of the seat body and extending downward, and the seat body is fixed to the back of the end plate through the plurality of connecting columns;

[0022] The limiting structure includes a slide groove formed on the inner side surfaces of the plurality of connecting columns and extending up and down, a limiting pin formed on the bottom of the seat body and extending downward, and a pin hole formed on the check valve plate;

[0023] The outer peripheral surface of the check valve plate slides with the slide groove in the up and down directions, and the check valve plate slides with the limit pin up and down through the pin hole to limit the rotational freedom of the check valve plate when it moves up and down.

[0024] In the above technical solution, the check valve seat includes a seat body and a plurality of connecting columns connected to the bottom of the seat body and extending downward, and the seat body is fixed to the back of the end plate through the plurality of connecting columns;

[0025] The limiting structure includes a plurality of pin holes arranged on the check valve plate, the positions of the plurality of pin holes correspond to the positions of the plurality of connecting columns one by one, and the diameters of the pin holes match the diameters of the connecting columns;

[0026] The check valve plate is slidably matched with a plurality of connecting columns through a plurality of pin holes to limit the rotational freedom of the check valve plate when it moves up and down.

[0027] In the above technical solution, the check valve seat includes a seat body and a plurality of connecting columns connected to the bottom of the seat body and extending downward, the seat body is fixed to the back of the end plate through the plurality of connecting columns, and a limit opening extending upward and downward is defined between two adjacent connecting columns among the plurality of connecting columns;

[0028] The limiting structure includes a slide groove formed on the inner side surfaces of the plurality of connecting columns and extending up and down, and a limiting portion protruding from the outer periphery of the check valve plate, and the outer periphery of the check valve plate is divided into a limiting portion with the limiting portion and a sliding portion without the limiting portion by the limiting portion;

[0029] The sliding part of the outer periphery of the check valve plate cooperates with the slide groove to slide up and down, and the limiting part of the outer periphery of the check valve plate cooperates with the circumferential limiting of the limiting port to limit the rotational freedom of the check valve plate when it moves up and down.

[0030] A second aspect of an embodiment of the present application provides a pump body assembly, which includes a movable scroll and the fixed scroll provided by the first aspect of the embodiment of the present application, and the movable scroll teeth of the movable scroll and the fixed scroll teeth of the fixed scroll cooperate to form a compression chamber.

[0031] A third aspect of the embodiments of the present application provides a scroll compressor, which includes the fixed scroll provided in the first aspect of the embodiments of the present application or the pump body assembly provided in the second aspect of the embodiments of the present application.

[0032] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0033] In the embodiment of the present application, a buffer structure is provided between the check valve plate and the back side of the end plate, so that the impact force of the check valve plate when it moves downward can be reduced, thereby effectively protecting the check valve plate and preventing the check valve plate from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the cross-sectional structure of the fixed scroll in Example 1 of the present application;

[0035] Figure 2 This is a schematic diagram of the explosion structure of the exhaust check device in Example 1 of the present application;

[0036] Figure 3 for Figure 1 A schematic cross-sectional view of the AA surface in the embodiment;

[0037] Figure 4 for Figure 1Schematic diagram of the enlarged structure of B in the embodiment

[0038] Figure 5 Schematic diagram of the cross-sectional structure of the fixed scroll in Example 2 of the present application;

[0039] Figure 6 This is a schematic diagram of the explosion structure of the exhaust check device in Example 2 of the present application;

[0040] Figure 7 Schematic diagram of the cross-sectional structure of the fixed scroll in Example 3 of the present application;

[0041] Figure 8 This is a schematic diagram of the explosion structure of the exhaust check device in Example 3 of the present application.

[0042] in:

[0043] 100-end plate; 101-front; 102-back; 1021-first mounting surface; 10211-threaded hole; 1022-second mounting surface; 103-fixed scroll gear; 104-exhaust hole;

[0044] 200-exhaust check device; 201-check valve seat; 201a-seat body; 201b-connecting column; 202-check valve plate; 203-buffer; 2031-lower matching surface; 2032-upper matching surface; 2033-air outlet; 2034-conical transition surface; 2035-annular pressing surface;

[0045] 300-compression chamber;

[0046] 400-positioning bolt;

[0047] 500-airflow chamber;

[0048] 501-slideway; 502-limiting pin; 503-pin hole; 504-limiting opening; 505-limiting part;

[0049] 600-Unloading valve assembly. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0051] Throughout the specification and claims, the following terms have at least the meanings explicitly associated herein, unless the context dictates otherwise. The meanings identified below do not necessarily limit the terms, but merely provide illustrative examples of the terms.

[0052] In the description of the present invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments" as used herein, when used multiple times, does not necessarily refer to the same embodiment, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or", unless the context clearly dictates otherwise. The term "based on" is not exclusive and allows for additional factors not described, unless the context clearly dictates otherwise. The word "exemplary" means "used as an example, instance or illustration" in this article. Any embodiment described herein as "exemplary" is not necessarily interpreted as being superior or superior to other embodiments. The scope of the present invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but only to set forth some of the many possible embodiments of the claimed invention. The various embodiments provided by the present invention should not be interpreted as limiting the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] The scroll compressor consists of a sealed shell, a fixed scroll, a movable scroll, a bracket, an eccentric crankshaft, an anti-rotation mechanism and a motor. The profiles of the movable and fixed scrolls are both spiral. The movable scroll is eccentric to the fixed scroll and installed 180° apart, so multiple crescent-shaped spaces are formed between the movable and fixed scrolls. The movable scroll rotates with the center of the fixed scroll as the center and rotates at a certain rotation eccentric radius without self-rotation. The outer crescent-shaped space moves continuously toward the center. At this time, the refrigerant is gradually pushed toward the center space, and its volume continues to shrink while the pressure continues to increase until it is connected to the central exhaust hole, and the high-pressure refrigerant is discharged from the pump body.

[0058] When the scroll compressor stops, the high-pressure refrigerant on the exhaust side will flow back to the suction side, causing reverse noise and even damage to the pump structure. Therefore, scroll compressors are equipped with an anti-reverse mechanism, which is usually a set of one-way check valves. Currently, scroll compressors are developing towards high speed and large displacement, and often operate under conditions with a large pressure difference between the discharge pressure and the suction pressure. Under this condition, the one-way check valve plate repeatedly hits the pump body and the baffle, which is prone to valve plate breakage.

[0059] Example 1

[0060] Based on this, Figure 1-Figure 4 As shown, in a first aspect of an embodiment of the present application, a fixed scroll with an exhaust check function is provided, which is used to cooperate with a movable scroll of a scroll compressor, and the fixed scroll includes:

[0061] The end plate 100 has a front side 101 facing the orbiting scroll and a back side 102 opposite to the front side 101. The front side of the end plate 100 is provided with a fixed scroll gear 103. The end plate 100 is also provided with an exhaust hole 104 penetrating the front side 101 and the back side 102 of the end plate; preferably, the exhaust hole 104 is provided in the middle of the end plate 100;

[0062] The exhaust check device 200 is installed on the back side 102 of the end plate 100. The exhaust check device 200 includes a check valve seat 201 fixed on the back side of the end plate 100 and a check valve plate 202 installed in the check valve seat 201. The check valve plate 202 is arranged corresponding to the exhaust hole 104 and can move up and down relative to the check valve seat 201 to open or close the exhaust hole 104. When the exhaust hole 104 is exhausted, the check valve plate 202 can move upward under the upward push of the refrigerant to open the exhaust hole 104. When the exhaust hole 104 stops exhausting, the check valve plate 202 can move downward under the downward push of the refrigerant to close the exhaust hole 104.

[0063] The exhaust check device 200 further includes a buffer structure disposed between the check valve plate 202 and the back side 102 of the end plate, and the buffer structure is used to cooperate with the check valve plate 202 when the check valve plate 202 moves downward to reduce the impact force of the check valve plate 202 when it moves downward.

[0064] In the embodiment of the present application, a buffer structure is provided between the check valve plate 202 and the back side 102 of the end plate 100, so that the impact force of the check valve plate 202 when moving downward can be reduced, thereby effectively protecting the check valve plate 202 and preventing the check valve plate 202 from breaking.

[0065] Specifically, by providing a buffer structure to slow down the impact force of the check valve plate 202 when it moves downward, the impact force of the check valve plate 202 when it moves downward can be effectively reduced, and the check valve plate 202 can be prevented from breaking. Thereby improving the durability of the check valve plate 202 and the reliability of the entire scroll compressor. The check valve plate 202 can automatically open or close the exhaust hole 104 according to the pressure change of the refrigerant, ensuring that the high-pressure refrigerant can be discharged smoothly during exhaust, and can prevent the refrigerant from flowing back when the exhaust is stopped, which helps to improve the exhaust efficiency and the overall performance of the compressor. The effective exhaust check function can prevent unnecessary leakage of the refrigerant, reduce energy loss, and thus improve the energy efficiency of the entire system. It is worth noting that the design can adapt to different working conditions, especially under conditions where the pressure difference between the exhaust pressure and the suction pressure is large, it can still maintain stable performance, which enhances the adaptability of the compressor to different working conditions.

[0066] Further, in some possible implementations, the buffer structure includes a buffer member 203 fixed on the back surface 102 of the end plate, the buffer member 203 includes a lower mating surface 2031 fixedly matched with the back surface 102 of the end plate and an upper mating surface 2032 opposite to the lower mating surface 2031, and an air outlet 2033 penetrating the upper mating surface 2032 and the lower mating surface 2031 is formed on the buffer member 203;

[0067] The air outlet hole 2033 is arranged corresponding to the exhaust hole 104 on the end plate 100 and an air flow channel is formed between the two. When the check valve plate 202 moves downward, the check valve plate 202 can cooperate with the upper mating surface 2032 of the buffer component 203 and seal the air outlet hole 2033 of the buffer component 203 to close the air flow channel formed by the air outlet hole 2033 and the exhaust hole 104.

[0068] In the embodiment of the present application, an air outlet hole 2033 is provided on the buffer 203, and the air outlet hole 2033 and the exhaust hole 104 form an air flow channel. When the check valve plate 202 moves downward, the air flow channel can be closed, which helps to control the air flow more accurately, prevent the refrigerant from flowing back at inappropriate times, and improve the efficiency of the compressor. The matching design of the check valve plate 202 and the upper matching surface 2032 of the buffer 203 enhances the sealing performance, ensuring that when the compressor stops exhausting, the refrigerant will not leak through the channel between the air outlet hole 2033 and the exhaust hole 104, thereby improving the sealing and reliability of the system.

[0069] Further, in some possible implementations, the buffer member 203 includes a disc spring fixedly disposed on the back surface 102 of the end plate, and the disc spring is formed with a lower mating surface 2031 with a large diameter and an upper mating surface 2032 with a small diameter in its compression direction;

[0070] When the disc spring is mated with the back side 102 of the end plate through the lower mating surface 2031 of the large diameter, a compression chamber 300 is formed between the inner cavity of the disc spring and the back side 102 of the end plate.

[0071] The disc spring in the embodiment of the present application is an elastic element with good buffering and vibration reduction effects. The large-diameter lower mating surface 2031 of the disc spring cooperates with the back side 102 of the end plate to effectively absorb the impact force of the check valve plate 202 when it moves downward, reducing damage to the check valve plate 202. The large-diameter lower mating surface 2031 of the disc spring cooperates with the back side 102 of the end plate to provide a stable support point, which helps to maintain the stability of the check valve plate 202 during movement and reduce wear and noise caused by vibration. The compression chamber 300 between the disc spring and the back side 102 of the end plate is designed to store compression energy. When the check valve plate 202 falls rapidly, the compressed air in the compression chamber 300 can further slow down the impact of the check valve plate 202 and improve the buffering effect. The upper mating surface 2032 of the disc spring has a small contact area with the check valve plate 202, which helps to seal the air outlet 2033 more tightly when the check valve plate 202 moves downward, thereby improving the sealing performance of the system.

[0072] Further, in some possible implementations, such as Figure 4As shown, the back side 102 of the end plate is formed with a first mounting surface 1021 and a second mounting surface 1022 which are located at the periphery of the exhaust hole 104 and are in a stepped shape. The first mounting surface 1021 is arranged away from the exhaust hole 104 relative to the second mounting surface 1022. A threaded hole 10211 is formed on the first mounting surface 1021. A mounting hole 2011 corresponding to the threaded hole 10211 is formed on the check valve seat 201. The check valve seat 201 is fixed to the first mounting surface 1021 of the end plate 100 by a positioning bolt 400 which penetrates the mounting hole 2011 and the threaded hole 10211, wherein a part of the bottom end of the check valve seat 201 is interference-fitted with the first mounting surface 1021, and another part is clearance-fitted with the second mounting surface 1022 to form an embedded area.

[0073] The outer periphery of the disc spring is also formed with an annular conical transition surface 2034 between the upper mating surface 2032 and the lower mating surface 2031, and an annular pressing surface 2035 is also formed between the bottom end of the annular conical transition surface 2034 and the outer periphery of the lower mating surface 2031;

[0074] At least a portion of the annular pressing surface 2035 is embedded in the embedding area and is interference fit with the second mounting surface 1022 on the end plate 100 and the bottom end surface of the check valve seat 201 .

[0075] In the embodiment of the present application, a stepped first mounting surface 1021 and a second mounting surface 1022 are provided on the back side 102 of the end plate. On the one hand, the check valve seat 201 is fixed by the cooperation between the first mounting surface 1021 and the check valve seat 201. On the other hand, a part of the bottom end of the check valve seat 201 is interference fit with the first mounting surface 1021, and the other part is gap fit with the second mounting surface 1022 to form an embedding area, and at least a part of the annular pressing surface 2035 of the disc spring is embedded in the embedding area. In this way, when the check valve seat 201 is fixed by the positioning bolt 400, the disc spring can also be fixed to the back side 102 of the end plate, thereby eliminating the need to separately provide a locking structure to fix the disc spring.

[0076] Furthermore, in some possible implementations, the central axis of the air outlet hole 2033 of the buffer member 203 coincides with the central axis of the air outlet hole 104 on the end plate 100 , and the aperture of the air outlet hole 2033 is greater than or equal to the aperture of the air outlet hole 104 .

[0077] In the embodiment of the present application, the central axis of the air outlet hole 2033 and the exhaust hole 104 is set to coincide, thereby ensuring the linearity of the airflow channel, reducing the disturbance and pressure loss of the airflow when passing through, thereby optimizing the flow characteristics of the airflow. By setting the aperture of the air outlet hole 2033 to be greater than or equal to the aperture of the exhaust hole 104, this design can reduce the resistance of the airflow when passing through the buffer 203, and improve the exhaust efficiency, especially under high pressure difference conditions.

[0078] Further, in some possible implementations, such as Figure 1-Figure 4 As shown, the check valve seat 201 includes a seat body 201a, and a connecting column 201b connected to the bottom of the seat body 201a and extending downward, the seat body 201a is fixed to the back side 102 of the end plate through the connecting column 201b, and a plurality of connecting columns 201b are provided, and the plurality of connecting columns 201b are distributed circumferentially at the bottom of the seat body 201a, and an airflow cavity 500 connected to the exhaust cavity of the scroll compressor is defined between the seat body 201a, the plurality of connecting columns 201b and the back side 102 of the end plate; it is worth noting that the above-mentioned connecting column 201b can be integrally formed with the seat body 201a, or can be fixedly installed on the seat body 201a as a split component.

[0079] When the exhaust hole 104 is exhausting, the check valve plate 202 can move upward under the upward push of the refrigerant to open the exhaust hole 104, and be discharged into the exhaust chamber of the scroll compressor through the air flow chamber 500. When the exhaust hole 104 stops exhausting, the refrigerant in the exhaust chamber can flow back to the check valve plate 202 and push the check valve plate 202 downward to close the exhaust hole 104 through the check valve plate 202.

[0080] The check valve seat 201 in the embodiment of the present application is fixed to the back side 102 of the end plate by a connecting column 201b. The design of multiple connecting columns provides multiple fixing points, which enhances the structural stability of the check valve seat 201 and reduces the risk of deformation under high pressure difference conditions. The design of the airflow chamber 500 makes the exhaust path more direct and smooth, reduces the resistance and energy loss of the airflow during the exhaust process, and improves the exhaust efficiency. When the exhaust hole 104 is exhausted, the check valve plate 202 moves upward to open the exhaust hole 104, and discharges the high-pressure refrigerant into the exhaust chamber of the scroll compressor through the airflow chamber 500. When the exhaust stops, the refrigerant in the exhaust chamber can smoothly flow back to the check valve plate 202 and push it downward to close the exhaust hole 104. This design improves the exhaust efficiency.

[0081] It is worth noting that if Figure 2As shown, a plurality of air holes corresponding to the upper end of the check valve plate 202 are also provided on the top of the check valve seat 201 in the embodiment of the present application, so that when the exhaust hole 104 stops exhausting, the refrigerant in the exhaust chamber can also push the check valve plate 202 to move downward through the air holes on the plurality of check valve seats 201, thereby achieving a rapid fall back of the check valve plate 202 while avoiding the check valve plate 202 from generating a large degree of rotational freedom when falling back.

[0082] Further, in some possible implementations, a limited position structure is formed between the check valve seat 201 and the check valve plate 202;

[0083] When the check valve plate 202 moves up and down, the limiting structure can reduce the rotational freedom of the check valve plate 202 when it moves up and down.

[0084] In the embodiment of the present application, the limit structure is provided to limit the rotational freedom of the check valve disc 202 when it moves up and down, reduce the friction and wear between the valve disc and the valve seat, and thus extend the service life of the check valve disc 202. The limit structure is provided to ensure that the check valve disc 202 works within the designed motion trajectory, reducing the risk of valve disc breakage caused by valve disc deviation or excessive rotation.

[0085] Specifically, in some possible implementations, such as Figure 1-Figure 4 As shown, the check valve seat 201 includes a seat body 201a and a plurality of connecting posts 201b connected to the bottom of the seat body 201a and extending downward, and the seat body 201a is fixed to the back side 102 of the end plate through the plurality of connecting posts 201b;

[0086] The limiting structure includes a slide groove 501 formed on the inner side of the plurality of connecting columns 201b and extending up and down, a limiting pin 502 formed on the bottom of the seat body 201a and extending downward, and a pin hole 503 formed on the check valve plate 202;

[0087] The outer peripheral surface of the check valve plate 202 slides with the slide groove 501 in the up and down direction, and the check valve plate 202 slides with the limit pin 502 through the pin hole 503 to limit the rotational freedom of the check valve plate 202 when moving up and down.

[0088] In the embodiment of the present application, a precise limiting structure is formed by the slide groove 501 formed on the inner side of the connecting column 201b, the limiting pin 502 at the bottom of the seat body 201a, and the pin hole 503 on the check valve plate 202, which effectively controls the rotation and sliding of the check valve plate 202, thereby improving the accuracy and controllability of the valve plate movement. The design of this limiting structure enhances the stability and durability of the check valve plate 202 under high-frequency operation, and reduces the wear and damage caused by excessive rotational freedom. By limiting the rotational freedom of the check valve plate 202, the abnormal contact between the valve plate and the valve seat can be reduced, thereby reducing the noise generated by impact and vibration.

[0089] Furthermore, the second aspect of the embodiment of the present application also provides a pump body assembly, which includes a movable scroll and the fixed scroll provided by the first aspect of the embodiment of the present application, and the movable scroll teeth of the movable scroll and the fixed scroll teeth of the fixed scroll cooperate to form a compression chamber.

[0090] Furthermore, the third aspect of the embodiment of the present application also provides a scroll compressor, which includes the fixed scroll provided in the first aspect of the embodiment of the present application or the pump body assembly provided in the second aspect of the embodiment of the present application.

[0091] In order to more clearly understand the working principle of the scroll compressor in the embodiment of the present application, Figure 1-Figure 4 To explain in detail:

[0092] like Figure 1-Figure 4 As shown, the exhaust check device 200 of the scroll compressor in the embodiment of the present application is composed of a check valve seat 201, a check valve plate 202, a buffer 203, and a limit pin 502, which are fixed to the back side 102 of the end plate of the fixed scroll disk by a positioning screw 400, wherein the buffer 203 is a disc spring structure that can absorb impact energy. When the scroll compressor is started, the motor drives the crankshaft assembly to move, and the anti-rotation mechanism European ring is installed in the upper bracket of the scroll compressor. Under the drive of the crankshaft assembly and the restriction of the anti-rotation mechanism European ring, when the movable scroll disk rotates with the center of the fixed scroll disk as the center and performs non-rotation rotational translation at a certain rotation eccentric radius, the outer crescent-shaped space continuously moves toward the center.

[0093] When operating under light load conditions, the refrigerant can be discharged from the unloading valve assembly 600 into the exhaust cavity surrounded by the upper cover assembly. When operating under high pressure difference conditions, the refrigerant is gradually pushed to the central space, its volume is continuously reduced and the pressure is continuously increased until it is connected with the central exhaust hole 104. The exhaust refrigerant pushes the check valve plate 202 to the check valve seat 201. One end of the limit pin 502 is fixed on the check valve seat 201 by interference {the fixing method is not limited to this, and it can also be integrated with the check valve seat 201}, and the other end cooperates with the air outlet 2033 opened on the check valve plate 202 to reduce the rotational freedom of the check valve plate 202. The high-pressure refrigerant is discharged from the air flow cavity 500 on both sides of the check valve seat 201 into the exhaust cavity surrounded by the upper cover assembly. When the previous exhaust cycle ends and the next exhaust cycle just begins, the check valve plate 202 falls quickly to the buffer 203 under the push of the high-pressure refrigerant backflow. During the process of the check valve plate 202 repeatedly rising and falling, its freedom of movement is simplified and restricted. Due to the limiting pin 502, its rotational freedom is restricted and the swing amplitude is restricted. At the same time, under the buffering and damping action of the buffer member 203, the energy of the impact of the check valve plate 202 is reduced, the dimensional wear of the check valve plate 202 is reduced, and the check valve plate 202 is prevented from breaking due to excessive freedom of movement, thereby avoiding failure.

[0094] Example 2

[0095] The difference between this embodiment and embodiment 1 is that the specific composition of the limiting structure in this embodiment is different from that in embodiment 1:

[0096] Specifically, Figure 5 and Figure 6 As shown, the limiting structure in this embodiment includes a plurality of pin holes 503 arranged on the check valve plate 202, the positions of the plurality of pin holes 503 correspond to the positions of the plurality of connecting columns 201b one by one, and the diameter of the pin holes 503 matches the diameter of the connecting column 201b;

[0097] The check valve plate 202 is slidably matched with the multiple connecting posts 201b through the multiple pin holes 503 to limit the rotational freedom of the check valve plate 202 when it moves up and down. It is worth noting that the connecting posts 201b can be integrally formed with the seat body 201a, or can be fixedly installed on the seat body 201a as a separate part.

[0098] Specifically, during the process of the check valve plate 202 in the present embodiment repeatedly rising and falling, since a plurality of pin holes 503 are provided on the check valve plate 202, which respectively correspond one-to-one with a plurality of connecting columns 201b on the check valve seat 202, its rotational freedom is restricted and its swing amplitude is restricted. At the same time, under the buffering and damping action of the buffer member 203, the energy of the impact of the check valve plate 202 is reduced, the dimensional wear of the check valve plate 202 is reduced, and the check valve plate 202 is prevented from breaking due to excessive freedom of movement, thereby avoiding failure.

[0099] Example 3

[0100] The difference between this embodiment and embodiment 1 and embodiment 2 is that the specific composition of the limiting structure in this embodiment is different from that in embodiment 1 and embodiment 2:

[0101] Specifically, the check valve seat 201 in this embodiment includes a seat body 201a and a plurality of connecting columns 201b connected to the bottom of the seat body 201a and extending downward, the seat body 201a is fixed to the back side 102 of the end plate through the plurality of connecting columns 201b, and a limit opening 504 extending upward and downward is defined between two adjacent connecting columns 201b among the plurality of connecting columns 201b;

[0102] The limiting structure includes a slide groove 501 formed on the inner side of the plurality of connecting columns 201b and extending up and down, and a limiting portion 505 protruding from the outer periphery of the check valve plate 202. The outer periphery of the check valve plate 202 is divided into a limiting portion with the limiting portion and a sliding portion without the limiting portion by the limiting portion 505.

[0103] The sliding part of the outer periphery of the check valve plate 202 is matched with the slide groove 501 to slide up and down, and the limiting part of the outer periphery of the check valve plate 202 is matched with the limiting opening 504 to limit the rotational freedom of the check valve plate 202 when it moves up and down. It is worth noting that the above-mentioned connecting column 201b can be integrally formed with the seat body 201a, or can be fixedly installed on the seat body 201a as a separate component.

[0104] Specifically, during the process of repeated lifting and falling of the check valve plate 202 in the present embodiment, since a limiting portion 505 is provided on the check valve plate 202, preferably, two limiting portions 505 are provided, which respectively cooperate with the limiting openings 504 formed by two adjacent connecting columns 201b in the circumferential direction of the check valve seat 201, so that its rotational freedom and swing amplitude are limited, and at the same time, under the buffering and damping action of the buffer member 203, the energy of the impact of the check valve plate 202 is reduced, the dimensional wear of the check valve plate 202 is reduced, and the check valve plate 202 is prevented from breaking due to excessive freedom of movement, thereby avoiding failure.

[0105] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The steps shown in the relevant flow chart can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in an order different from that here. In other words, the order of steps described in the foregoing embodiments is only an example, and it is also within the scope of protection of the embodiments of the present application to reasonably adjust the order of steps based on the content of the embodiments of the present application.

[0106] The sequence of serial numbers or introduction of the embodiments of the present application is for description only and does not represent the superiority or inferiority of the embodiments.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0108] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fixed scroll with exhaust check function, used to cooperate with the movable scroll of a scroll compressor, characterized in that: The fixed scroll comprises: an end plate (100), the end plate (100) having a front side (101) facing the movable scroll and a back side (102) opposite to the front side (101), the front side of the end plate (100) being provided with a fixed scroll tooth (103), and the end plate (100) being further provided with an exhaust hole (104) penetrating the front side (101) and the back side (102); An exhaust check device (200), the exhaust check device (200) being installed on the back side (102) of the end plate (100), the exhaust check device (200) comprising a check valve seat (201) fixed on the back side of the end plate (100) and a check valve plate (202) installed in the check valve seat (201), the check valve plate (202) being arranged corresponding to the exhaust hole (104) and being able to move up and down relative to the check valve seat (201) to open or close the exhaust hole (104), wherein when the exhaust hole (104) is exhausting, the check valve plate (202) is able to move upward under the upward push of the refrigerant to open the exhaust hole (104), and when the exhaust hole (104) stops exhausting, the check valve plate (202) is able to move downward under the downward push of the refrigerant to close the exhaust hole (104); The exhaust check device (200) further comprises a buffer structure arranged between the check valve plate (202) and the back side (102) of the end plate, wherein the buffer structure is used to cooperate with the check valve plate (202) when the check valve plate (202) moves downward.

2. The fixed scroll according to claim 1, characterized in that: The buffer structure comprises a buffer member (203) arranged on the back side (102) of the end plate, the buffer member (203) comprising a lower mating surface (2031) mating with the back side (102) of the end plate and an upper mating surface (2032) opposite to the lower mating surface (2031), and an air outlet (2033) penetrating the upper mating surface (2032) and the lower mating surface (2031) is formed on the buffer member (203); The air outlet hole (2033) is arranged corresponding to the exhaust hole (104) on the end plate (100) and an air flow channel is formed between the two. When the check valve plate (202) moves downward, the check valve plate (202) can cooperate with the upper mating surface (2032) of the buffer component (203) and seal the air outlet hole (2033) of the buffer component (203) to close the air flow channel formed by the air outlet hole (2033) and the exhaust hole (104).

3. The fixed scroll according to claim 2, characterized in that: The buffer (203) comprises a disc spring arranged on the back side (102) of the end plate, wherein the disc spring is provided with a lower mating surface (2031) with a large diameter and an upper mating surface (2032) with a small diameter in the compression direction thereof; When the disc spring is mated with the back side (102) of the end plate through the lower mating surface (2031) with a large diameter, a compression chamber (300) is formed between the inner cavity of the disc spring and the back side (102) of the end plate.

4. The fixed scroll according to claim 3, characterized in that: The back side (102) of the end plate is formed with a first mounting surface (1021) and a second mounting surface (1022) which are located at the periphery of the exhaust hole (104) and are in a stepped shape. The first mounting surface (1021) is arranged away from the exhaust hole (104) relative to the second mounting surface (1022). A threaded hole (10211) is formed on the first mounting surface (1021). A mounting hole (2011) corresponding to the threaded hole (10211) is formed on the check valve seat (201). The check valve seat (201) is fixed to the first mounting surface (1021) of the end plate (100) by means of positioning bolts (400) which penetrate through the mounting hole (2011) and the threaded hole (10211). A portion of the bottom end of the check valve seat (201) is interference-fitted with the first mounting surface (1021), and another portion is clearance-fitted with the second mounting surface (1022) to form an embedded area. The outer periphery of the disc spring is also formed with an annular conical transition surface (2034) between the upper mating surface (2032) and the lower mating surface (2031), and an annular pressing surface (2035) is also formed between the bottom end of the annular conical transition surface (2034) and the outer periphery of the lower mating surface (2031); At least a portion of the annular pressing surface (2035) is embedded in the embedding area and is interference fit with the second mounting surface (1022) on the end plate (100) and the bottom end surface of the check valve seat (201).

5. The fixed scroll according to any one of claims 2 to 4, characterized in that: The air outlet hole (2033) of the buffer component (203) and the central axis of the air outlet hole (104) on the end plate (100) coincide with each other, and the aperture of the air outlet hole (2033) is greater than or equal to the aperture of the air outlet hole (104).

6. The fixed scroll according to any one of claims 1 to 4, characterized in that: The check valve seat (201) comprises a seat body (201a) and a connecting column (201b) connected to the bottom of the seat body (201a) and extending downward, the seat body (201a) is fixed to the back side (102) of the end plate through the connecting column (201b), a plurality of connecting columns (201b) are provided, and the plurality of connecting columns (201b) are distributed circumferentially at the bottom of the seat body (201a), and an airflow cavity (500) connected to the exhaust cavity of the scroll compressor is defined between the seat body (201a), the plurality of connecting columns (201b) and the back side (102) of the end plate; When the exhaust hole (104) is exhausted, the check valve plate (202) can move upward under the upward push of the refrigerant to open the exhaust hole (104), and discharge into the exhaust chamber of the scroll compressor through the air flow chamber (500); when the exhaust hole (104) stops exhausting, the refrigerant in the exhaust chamber can flow back to the check valve plate (202) and push the check valve plate (202) downward to close the exhaust hole (104) through the check valve plate (202).

7. The fixed scroll according to any one of claims 1 to 4, characterized in that: A limit position structure is formed between the check valve seat (201) and the check valve plate (202); When the check valve plate (202) moves up and down, the limiting structure can reduce the rotational freedom of the check valve plate (202) when it moves up and down.

8. The fixed scroll according to claim 7, characterized in that: The check valve seat (201) comprises a seat body (201a) and a plurality of connecting columns (201b) connected to the bottom of the seat body (201a) and extending downward, and the seat body (201a) is fixed to the back side (102) of the end plate via the plurality of connecting columns (201b); The limiting structure comprises a slide groove (501) formed on the inner side surfaces of the plurality of connecting columns (201b) and extending up and down, a limiting pin (502) formed on the bottom of the seat body (201a) and extending downward, and a pin hole (503) formed on the check valve plate (202); The outer peripheral surface of the check valve plate (202) is slidably engaged with the slide groove (501) in the up and down directions, and the check valve plate (202) is slidably engaged with the limit pin (502) through the pin hole (503) to limit the rotational freedom of the check valve plate (202) when it moves up and down.

9. The fixed scroll according to claim 7, characterized in that: The check valve seat (201) comprises a seat body (201a) and a plurality of connecting columns (201b) connected to the bottom of the seat body (201a) and extending downward, and the seat body (201a) is fixed to the back side (102) of the end plate via the plurality of connecting columns (201b); The limiting structure comprises a plurality of pin holes (503) arranged on the check valve plate (202), the positions of the plurality of pin holes (503) and the positions of the plurality of connecting columns (201b) correspond one to one, and the diameter of the pin holes (503) and the diameter of the connecting column (201b) are adapted; The check valve plate (202) is slidably matched with the multiple connecting columns (201b) through the multiple pin holes (503) to limit the rotational freedom of the check valve plate (202) when it moves up and down.

10. The fixed scroll according to claim 7, characterized in that: The check valve seat (201) comprises a seat body (201a) and a plurality of connecting columns (201b) connected to the bottom of the seat body (201a) and extending downward, the seat body (201a) is fixed to the back side (102) of the end plate via the plurality of connecting columns (201b), and a limit opening (504) extending upward and downward is defined between two adjacent connecting columns (201b) of the plurality of connecting columns (201b); The limiting structure comprises a sliding groove (501) formed on the inner side surfaces of the plurality of connecting columns (201b) and extending up and down, and a limiting portion (505) protruding from the outer periphery of the check valve plate (202), and the outer periphery of the check valve plate (202) is divided into a limiting portion having the limiting portion and a sliding portion without the limiting portion by the limiting portion (505); The sliding portion on the periphery of the check valve plate (202) cooperates with the slide groove (501) to slide up and down, and the limiting portion on the periphery of the check valve plate (202) cooperates with the limiting opening (504) to limit the rotational freedom of the check valve plate (202) when it moves up and down.

11. A pump assembly, characterized in that: The invention comprises an orbiting scroll and a fixed scroll according to any one of claims 1 to 10, wherein the orbiting scroll teeth of the orbiting scroll and the fixed scroll teeth of the fixed scroll cooperate to form a compression chamber.

12. A scroll compressor, characterized in that: The invention comprises the fixed scroll according to any one of claims 1 to 10 or the pump body assembly according to claim 11.

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