Static scroll plate of scroll compressor and scroll compressor

Abstract

The utility model relates to the technical field of scroll compressors, in particular to a static scroll plate of a scroll compressor and the scroll compressor, the static scroll plate of the scroll compressor comprises a body and a valve plate, when the scroll compressor works normally, the valve plate is located on the side, away from an air inlet, of a limiting convex ring in the preset direction; the valve plate is located at the first position under the action of the gravity of the valve plate and the gas pressure in a compression cavity formed by the vortex cavity in the static vortex plate and the movable vortex plate, so that gas leakage in the compression cavity is avoided, and meanwhile, pipeline vibration caused by pressure fluctuation in the compression cavity is prevented. When gas in the compression cavity is continuously heated, enhanced vapor injection gas enters the compression cavity through the gas inlet, due to the fact that the gas inlet is located below the limiting convex ring, the enhanced vapor injection gas enables the valve plate to be switched to the second position from the first position, the valve plate and the limiting convex ring are arranged at intervals, and the enhanced vapor injection gas of the gas inlet can enter the compression cavity through the first gas channel; the refrigeration efficiency of the scroll compressor is improved, and the exhaust temperature of the scroll compressor is reduced.

Description

[0001] This application claims priority to patent application number 202420915923.9 (the filing date of the prior application is April 29, 2024, and the name of the utility model is "A jet enthalpy increase structure for a scroll compressor"). Technical Field

[0002] The utility model relates to the technical field of scroll compressors, in particular to a fixed scroll disk of a scroll compressor and a scroll compressor. Background Art

[0003] The compressor is the heart of the automobile air conditioning refrigeration system, playing the role of compressing and transporting refrigerant vapor. When the scroll compressor operates under high compression ratio conditions (low evaporating temperature, high condensing temperature), the exhaust temperature will become very high, even exceeding the upper limit of the exhaust temperature allowed by the compressor.

[0004] To solve this problem, a jet enthalpy increase scheme is introduced. An enthalpy increase channel is set on the main body to transport the jet enthalpy increase gas into the compression chamber. The supercooled jet enthalpy increase gas is sprayed into the compression chamber through the enthalpy increase channel to form a quasi-two-stage compression, which improves the refrigeration capacity of the compressor to a certain extent, and can effectively reduce the exhaust temperature and effectively expand the operating range of the compressor.

[0005] However, when the compressor does not need to turn on the jet reheat function, the reheat channel is connected to the compression chamber, which creates a clearance volume and generates expansion losses during operation, causing the compressor energy efficiency to decrease. At the same time, the pressure fluctuations in the compression chamber are transmitted to the jet reheat pipeline, causing the pipeline to vibrate violently, affecting the stability of the compressor.

[0006] Therefore, there is an urgent need for a fixed scroll disk of a scroll compressor and a scroll compressor to solve the above problems. Utility Model Content

[0007] The purpose of the present utility model is to provide a static scroll disk and a scroll compressor of a scroll compressor, so as to solve the problem in the related technology that the enthalpy increase channel is connected to the compression chamber, which causes the compressor energy efficiency to decrease when the compressor does not need to turn on the jet enthalpy increase function, and at the same time, the pressure fluctuation in the compression chamber is transmitted to the enthalpy increase channel, causing violent vibration of the pipeline and affecting the stability of the compressor.

[0008] In one aspect, the present invention provides a fixed scroll of a scroll compressor, the fixed scroll of the scroll compressor comprising:

[0009] The main body is provided with a vortex chamber and an enthalpy-increasing channel, and the jet enthalpy-increasing gas enters the vortex chamber through the enthalpy-increasing channel. The enthalpy-increasing channel includes a first air channel, which is arranged along a preset direction. The inner peripheral wall of the first air channel is convexly provided with a limiting convex ring. One end of the first air channel is located below the limiting convex ring along the preset direction and serves as an air inlet for the jet enthalpy-increasing gas.

[0010] A valve plate is slidably arranged in the first air channel and is located on the side of the limiting protrusion away from the air inlet. The valve plate has a first position and a second position in the first air channel, and the first position is located below the second position. In the first position, the valve plate abuts against the limiting protrusion and closes the first air channel. In the second position, the valve plate and the limiting protrusion are spaced apart and allow the jet enthalpy-increasing gas to pass through the first air channel.

[0011] As an optimal technical solution for the static scroll disk of the scroll compressor, the enthalpy increase channel also includes a second air duct, and the peripheral wall of the first air duct is provided with a connecting port, and the connecting port is located on the side of the valve plate away from the limiting convex ring, and the connecting port is connected to the second air duct, and the second air duct is connected to the vortex chamber.

[0012] As a preferred technical solution for the fixed scroll of the scroll compressor, the body includes an upper cover and an annular wall, and the upper cover and the annular wall enclose the scroll chamber;

[0013] The first air channel is located on the annular wall, and the second air channel is located on the upper cover.

[0014] As a preferred technical solution for the fixed scroll of the scroll compressor, the other end of the first air passage is located on the upper end surface of the body along the preset direction;

[0015] The valve body further comprises a blocking end cap, the blocking end cap being inserted into the other end of the first air passage, the lower end surface of the blocking end cap limiting the valve plate to the second position, the blocking end cap comprising a fixing portion and a limiting portion fixed to each other, the fixing portion being fixed to the body, and a peripheral wall of the limiting portion and a peripheral wall of the first air passage enclosing an air passage;

[0016] The valve plate is provided with a through-hole, and in the second position, the through-hole is communicated with the air passage, so that the injected enthalpy-increasing gas passing through the limiting convex ring can sequentially pass through the through-hole and the air passage into the connecting port;

[0017] Alternatively, an air gap is provided between the peripheral wall of the valve plate and the peripheral wall of the first air duct. In the second position, the air gap is connected to the air duct so that the jet enthalpy-increasing gas passing through the limiting convex ring can enter the connecting port through the air gap and the air duct in turn.

[0018] As a preferred technical solution for the fixed scroll of the scroll compressor, the other end of the first air passage is located on the upper end surface of the body along the preset direction;

[0019] It also includes a blocking end cover, which is inserted into the other end of the first air channel. The lower end surface of the blocking end cover limits the valve plate to the second position, and the valve plate is located below the blocking end cover. The lower end surface of the blocking end cover is recessed with a blind hole connected to the first air channel. The peripheral wall of the blocking end cover is provided with a through hole, which connects the blind hole with the connecting port. The valve plate is provided with a through hole. In the second position, the jet enthalpy-increasing gas passing through the limiting convex ring can enter the blind hole through the through hole.

[0020] As a preferred technical solution for the fixed scroll of the scroll compressor, the valve plate has a contact surface abutting against the lower end surface of the blocking end cover, and along the radial direction of the valve plate, the through hole is located on the inner side of the contact surface.

[0021] As an optimal technical solution for the fixed scroll disk of the scroll compressor, it also includes an elastic member, which is arranged between the valve plate and the sealing end cover and abuts against the valve plate and the sealing end cover respectively. When the elastic member is in a free state, the valve plate is in the first position.

[0022] As a preferred technical solution for the fixed scroll of the scroll compressor, the edge of the valve plate is provided with a flange, and the flange is in contact with the peripheral wall of the first air passage.

[0023] As a preferred technical solution for the fixed scroll of the scroll compressor, at least two second air passages are provided, and the at least two second air passages are arranged at an angle to each other.

[0024] As a preferred technical solution for the fixed scroll of the scroll compressor, the limiting convex ring is provided with a through hole capable of communicating with the first air passage;

[0025] The valve plate is provided with a protrusion that matches the through hole. At the first position, the protrusion is inserted into the through hole and closes the through hole.

[0026] On the other hand, the present invention provides a scroll compressor, comprising the fixed scroll of the scroll compressor in any of the above solutions.

[0027] The beneficial effects of the utility model are:

[0028] The utility model provides a static scroll disk and a scroll compressor of a scroll compressor. When the scroll compressor is working normally, a limiting convex ring is convexly provided on the inner peripheral wall of the first air channel. Since the first air channel is arranged along a preset direction, one end of the first air channel is located below the limiting convex ring along the preset direction and serves as an air inlet for the jet heat-increasing gas. The valve plate is slidingly arranged in the first air channel and is located on the side of the limiting convex ring away from the air inlet. The valve plate has a first position and a second position in the first air channel. The first position is located below the second position. Therefore, the valve plate is in the first position pressed on the limiting convex ring under the action of its own gravity and the pressure of the gas in the compression chamber composed of the vortex chamber on the static scroll disk and the movable scroll disk, and then the first air channel is closed to avoid leakage of the compressed gas in the compression chamber, thereby avoiding a reduction in the working efficiency of the scroll compressor, and at the same time preventing pressure fluctuations in the compression chamber from being transmitted to the heat-increasing channel, thereby avoiding severe vibration of the pipeline. When the gas in the compression chamber continues to heat up, the exhaust temperature continues to rise, and even exceeds the upper limit of the exhaust temperature allowed by the compressor. For this reason, it is necessary to input supercooled jet enthalpy-increasing gas into the compression chamber through the enthalpy-increasing channel. The jet enthalpy-increasing gas enters through the air inlet of the first air duct. Since the air inlet is located below the limiting convex ring, the pressure of the jet enthalpy-increasing gas will overcome the gravity of the valve plate itself and the pressure in the compression chamber, thereby switching the valve plate from the first position to the second position. At this time, the valve plate and the limiting convex ring are spaced apart, and the jet enthalpy-increasing gas at the air inlet can enter the compression chamber through the first air duct, thereby improving the refrigeration efficiency of the scroll compressor and reducing the exhaust temperature of the scroll compressor.

[0029] In summary, the above configuration improves the stability of the scroll compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the fixed scroll of the scroll compressor in the embodiment of the present utility model (the valve plate is in the second position);

[0031] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0032] Figure 3 Schematic diagram of the structure of the fixed scroll of the scroll compressor in the embodiment of the present utility model (the valve plate is in the first position);

[0033] Figure 4 A cross-sectional view of a fixed scroll of a scroll compressor in an embodiment of the present invention along a horizontal direction;

[0034] Figure 5 A top view of a fixed scroll of a scroll compressor according to an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the valve plate in an embodiment of the present utility model.

[0036] In the picture:

[0037] Z, preset direction;

[0038] 1. Body; 11. Scroll gear; 111. Scroll chamber; 12. Enthalpy increase channel; 121. First air channel; 1211. Position limiting protruding ring; 1212. First stepped hole; 1213. Second stepped hole; 122. Second air channel; 123. Third air channel; 124. Channel; 13. Upper cover; 14. Annular wall;

[0039] 2. Valve disc; 21. Perforation; 22. Protrusion; 23. Contact surface;

[0040] 3. Blocking end cap; 31. Fixing portion; 32. Limiting portion; 321. Blind hole; 322. Through hole;

[0041] 4. Plug. DETAILED DESCRIPTION

[0042] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0045] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 only to explain the present invention and are not to be construed as limiting the present invention.

[0046] Example 1

[0047] The scroll compressor includes a housing and a fixed scroll, an orbiting scroll and a frame installed in the housing; the fixed scroll has a body 1 and a scroll tooth 11 provided in a vortex cavity 111 of the body 1, and the vortex cavity 111 of the fixed scroll and the orbiting scroll form a compression cavity. During the gas compression process in the compression cavity, the gas temperature continues to rise, and the exhaust temperature continues to rise, even exceeding the upper limit of the exhaust temperature allowed by the compressor, affecting the stability of the scroll compressor. For this reason, an enthalpy increase channel 12 is provided on the fixed scroll to pass the supercooled jet enthalpy increase gas from the outside into the compression cavity through the enthalpy increase channel 12, thereby reducing the gas temperature in the compression cavity and improving the refrigeration effect. However, when there is no need to pass the supercooled jet enthalpy increase gas into the compression cavity, the enthalpy increase channel 12 will connect the compression cavity with the outside, thereby causing leakage in the compression cavity, affecting the efficiency of refrigeration.

[0048] To solve the above problems, Figures 1 to 6As shown, this embodiment provides a fixed scroll disk of a scroll compressor, and the fixed scroll disk of the scroll compressor includes a body 1 and a valve plate 2. The body 1 is provided with a vortex chamber 111 and an enthalpy increase channel 12. The enthalpy increase channel 12 is used to connect the external gas to the vortex chamber 111. The enthalpy increase channel 12 includes a first air channel 121, and the first air channel 121 is arranged along a preset direction Z. The inner peripheral wall of the first air channel 121 is provided with a limiting convex ring 1211 around the axial direction of the first air channel 121. One end of the first air channel 121 is arranged along the preset direction. Z is located below the limiting protrusion 1211 and serves as an air inlet; the valve plate 2 is slidably set in the first air channel 121 and is located on the side of the limiting protrusion 1211 away from the air inlet. The valve plate 2 has a first position and a second position in the first air channel 121. The first position is located below the second position. In the first position, the valve plate 2 abuts against the limiting protrusion 1211 and closes the first air channel 121. In the second position, the valve plate 2 and the limiting protrusion 1211 are spaced apart and allow the jet enthalpy-increasing gas to pass through the first air channel 121. When the scroll compressor is working normally, since the first air channel 121 is set along the preset direction Z, the valve plate 2 is located on the side of the limiting convex ring 1211 away from the air inlet along the preset direction Z, and the first position is below the second position. Therefore, the valve plate 2 is in the first position pressed on the limiting convex ring 1211 under the action of its own gravity and the pressure of the gas in the compression chamber, and then the first air channel 121 is closed to avoid leakage of the compressed gas in the compression chamber, thereby avoiding a decrease in the working efficiency of the scroll compressor, and at the same time preventing pressure fluctuations in the compression chamber from being transmitted to the enthalpy increase channel 12, thereby avoiding severe vibration of the pipeline. When the gas in the compression chamber is continuously heated up, the exhaust temperature is continuously increased, and even exceeds the upper limit of the exhaust temperature allowed by the compressor. For this reason, it is necessary to input supercooled jet enthalpy-increasing gas into the compression chamber through the enthalpy-increasing channel 12. The jet enthalpy-increasing gas enters through the air inlet of the first air channel 121. Since the air inlet is located below the limiting convex ring 1211, the pressure of the jet enthalpy-increasing gas will overcome the gravity of the valve plate 2 itself and the pressure in the compression chamber, thereby switching the valve plate 2 from the first position to the second position. At this time, the valve plate 2 and the limiting convex ring 1211 are spaced apart, and the gas at the air inlet can enter the compression chamber through the first air channel 121, thereby improving the refrigeration efficiency of the scroll compressor and reducing the exhaust temperature of the scroll compressor. In summary, the above-mentioned arrangement improves the stability of the scroll compressor.

[0049] Optionally, the preset direction Z is a direction parallel to the main shaft axis of the scroll compressor.

[0050] Regarding the formation of the limiting protrusion 1211, optionally, the first channel 124 includes a first stepped hole 1212 and a second stepped hole 1213 that are interconnected, and the radial dimension of the first stepped hole 1212 is smaller than the radial dimension of the second stepped hole 1213. Therefore, the limiting protrusion 1211 is formed at the connection between the first stepped hole 1212 and the second stepped hole 1213. In other embodiments, the limiting protrusion 1211 can also be an annular structure protruding from the inner wall of the first channel 124.

[0051] Optionally, the enthalpy-increasing passage 12 further includes a second air passage 122. A connecting port is provided on the peripheral wall of the first air passage 121. The connecting port is located on the side of the valve plate 2 away from the limiting protrusion 1211. The connecting port is in communication with the second air passage 122, and the second air passage 122 is in communication with the vortex chamber 111. In this embodiment, the first air passage 121 is located on one side of the volute 11 in the horizontal direction, and the second air passage 122 is located on the side of the volute 11 away from the orbiting scroll along the preset direction Z. The peripheral wall of the second air passage 122 is provided with a channel 124, which is in communication with the vortex chamber 111.

[0052] Preferably, the enthalpy-increasing channel 12 further includes a third air channel 123 extending in the horizontal direction. One end of the third air channel 123 is connected to the air inlet of the first channel 124, and the other end is used to communicate with the external supercooled jet enthalpy-increasing gas.

[0053] Optionally, the body 1 includes an upper cover 13 and an annular wall 14, which enclose a vortex chamber 111. The first air channel 121 is located in the annular wall 14, and the second air channel 122 is located in the upper cover 13. In this embodiment, the first air channel 121 and the third air channel 123 are located within the annular wall 14, and the second air channel 122 is located within the upper cover 13. This arrangement can reduce the overall volume of the body 1. Specifically, the upper cover 13 and the annular wall 14 are integrally formed.

[0054] Optionally, at least two second air channels 122 are provided, with the at least two second air channels 122 arranged at an angle to each other. In this embodiment, the at least two second air channels 122 can increase the amount of the injected enthalpy-increasing gas entering the compression chamber. Furthermore, the at least two second air channels 122 arranged at an angle with the axis of the first air channel 121 as the center can improve the uniformity of the injected enthalpy-increasing gas entering the compression chamber, thereby avoiding the problem of excessively high local temperatures in the compression chamber. Specifically, in this embodiment, two second air channels 122 are provided.

[0055] As for the structure of the second air channel 122, optionally, one end of the second air channel 122 is connected to the connecting port, and the other end of the second air channel 122 is located on the peripheral wall of the main body 1; the fixed scroll of the scroll compressor also includes a plug 4, which is inserted into the other end of the second air channel 122. In this embodiment, the second air channel 122 is machined on the peripheral wall of the main body 1 by a drilling process, so that the second air channel 122 is connected to the connecting hole, and the plug 4 is inserted into the opening of the second air channel 122 located on one side of the peripheral wall of the main body 1, thereby achieving the second air channel 122 connecting the first air channel 121 and the compression chamber. By removing the plug 4, the second air channel 122 can be cleaned to prevent the accumulation of impurities in the second air channel 122.

[0056] As for the structure of the first air channel 121, optionally, the other end of the first air channel 121 is located on the top wall of the main body 1; the fixed scroll disk of the scroll compressor also includes a blocking end cover 3, which is inserted at the other end of the first air channel 121. In this embodiment, the first air channel 121 is drilled along the preset direction Z on the main body 1 by a drilling process, so that the first air channel 121 is connected to one end of the second air channel 122 and one end of the third air channel 123 respectively, and the blocking end cover 3 is inserted at the other end of the first air channel 121 located on the top wall of the main body 1, thereby realizing that the first air channel 121 connects the second air channel 122 and the third air channel 123. By removing the blocking end cover 3, the first air channel 121 can be cleaned to prevent the accumulation of impurities in the first air channel 121. Specifically, the blocking end cover 3 is fixed to the main body 1 by screwing, clamping or gluing.

[0057] Optionally, the lower end surface of the blocking end cap 3 limits the valve disc 2 to the second position, and the valve disc 2 is located below the blocking end cap 3. The lower end surface of the blocking end cap 3 is recessed with a blind hole 321 that communicates with the first air passage 121. The peripheral wall of the blocking end cap 3 is provided with a through hole 322 that connects the blind hole 321 with the connection port. The valve disc 2 is provided with a perforation 21. In the second position, the injected enthalpy-increasing gas passing through the limiting protrusion 1211 can enter the blind hole 321 through the perforation 21. In this embodiment, the valve disc 2 is provided with a perforation 21. When the valve disc 2 is in the first position, the valve disc 2 abuts the limiting protrusion 1211 to close the first air passage 121, thereby preventing pressure relief in the compression chamber. When the valve plate 2 is in the second position, the valve plate 2 is in contact with the blocking end cover 3 or suspended below the blocking end cover 3, so that the jet enthalpy-increasing gas can pass through the through hole 21 and enter the blind hole 321. Since the through hole 322 on the blocking end cover 3 connects the blind hole 321 and the connecting hole, the jet enthalpy-increasing gas passes through the limiting convex ring 1211, the through hole 21, the blind hole 321, the through hole 322 and the connecting hole in turn, enters the second air channel 122, and finally enters the compression chamber.

[0058] Optionally, when the valve disc 2 is in the second position, the lower end surface of the sealing end cover 3 is located between the connecting hole and the limiting protrusion ring 1211. This setting can reduce the distance that the valve disc 2 moves along the preset direction Z, improve the switching efficiency of the valve disc 2 between the first position and the second position, and avoid rapid wear of the valve disc 2.

[0059] Optionally, a plurality of through-holes 21 are provided, and the plurality of through-holes 21 are arranged at intervals around the axial direction of the valve plate 2 .

[0060] When the scroll compressor is not working, there is no high-pressure gas in the compression chamber, and the valve plate 2 can only be pressed against the limiting convex ring 1211 under the action of gravity. When the scroll compressor is installed in a bumpy working environment such as a vehicle, the valve plate 2 will slide between the sealing end cover and the limiting convex ring 1211, which can easily cause abnormal noise and affect the user's experience. To solve this problem, the fixed scroll disk of the scroll compressor can optionally also include an elastic member, which is arranged between the valve plate 2 and the blocking end cover 3 and abuts against the valve plate 2 and the blocking end cover 3 respectively. When the elastic member is in a free state, the valve plate 2 is in a first position. In this embodiment, the elastic member presses the valve plate 2 against the limiting convex ring 1211, thereby preventing the valve plate 2 from sliding between the sealing end cover and the limiting convex ring 1211 when the scroll compressor is bumpy. Specifically, the elastic member is a coil spring.

[0061] Optionally, the edge of the valve disc 2 is provided with a flange that fits against the peripheral wall of the first air channel 121. In this embodiment, the flange extends along a preset direction Z toward the blocking end cap 3. The flange can slide relative to the peripheral wall of the first air channel 121, thereby preventing the valve disc 2 from tilting or getting stuck within the first air channel 121. The term "fits against" used in this embodiment refers to a particularly small spacing between the flange and the peripheral wall of the first air channel 121, specifically between 0.5 mm and 2 mm.

[0062] When the valve disc 2 is in the first position, how can the first air passage 121 be closed? Optionally, the limiting protrusion 1211 is provided with a through-hole that allows communication with the first air passage 121; the valve disc 2 is provided with a protrusion 22 that mates with the through-hole. In the first position, the protrusion 22 is inserted into the through-hole and closes it. In the first position, the valve disc 2 moves away from the limiting protrusion 1211 to disengage the protrusion 22 from the through-hole, thereby allowing the injected enthalpy-increasing gas to pass through the first air passage 121. In this embodiment, when the protrusion 22 is inserted into the through-hole, it abuts against the peripheral wall of the through-hole, thereby sealing the through-hole and, in turn, closing the first air passage 121.

[0063] In addition, the protrusion 22 also plays a role of limiting. When the protrusion 22 is inserted into the limiting protrusion ring 1211, the relative positions of the valve plate 2 and the limiting protrusion ring 1211 are always consistent.

[0064] Optionally, the protrusion 22 is hemispherical or conical. Compared to a planar valve disc 2, the contact area between the valve disc 2 and the limiting protrusion 1211 is larger. If the surface flatness of the valve disc 2 is poor, an air channel may easily form between the valve disc 2 and the limiting protrusion 1211, thereby reducing the sealing effect of the valve disc 2 on the via hole. In this embodiment, the contact area between the protrusion 22 and the limiting protrusion 1211 is smaller, so it is only necessary to ensure the surface flatness of the contact area between the protrusion 22 and the limiting protrusion 1211. This reduces the manufacturing precision requirements for the valve disc 2 and reduces the manufacturing cost.

[0065] Optionally, the valve disc 2 has a contact surface 23 abutting against the lower end surface of the blocking end cover 3 . Along the radial direction of the valve disc 2 , the through hole 21 is located on the inner side of the contact surface 23 and between the protrusion 22 and the contact surface 23 .

[0066] This embodiment also provides a scroll compressor, comprising the fixed scroll of the scroll compressor in the above solution.

[0067] Example 2

[0068] This embodiment is substantially the same as the first embodiment, with the only difference being that, optionally, the other end of the first air channel 121 is located on the upper end surface of the body 1 along the preset direction Z;

[0069] The fixed scroll of the scroll compressor also includes a blocking end cover 3, which is inserted into the other end of the first air passage 121. The lower end surface of the blocking end cover 3 limits the valve plate 2 to the second position. The blocking end cover 3 includes a fixed portion 31 and a limiting portion 32 fixed to each other. The fixed portion 31 is fixed to the body 1, and the peripheral wall of the limiting portion 32 and the peripheral wall of the first air passage 121 form an air passage. The valve plate 2 is provided with a through-hole 21. In the second position, the through-hole 21 is connected to the air passage, so that the gas with increased enthalpy injected through the limiting convex ring 1211 can enter the connecting port through the through-hole 21 and the air passage in sequence. In this embodiment, when the valve plate 2 is in the second position, the gas entering from the air inlet first passes through the through-hole 21, then enters the connecting hole through the air passage, and finally enters the compression chamber through the second air passage 122. At the same time, this setting makes the lower end face of the limiting part located between the connecting port and the limiting protrusion ring 1211, thereby shortening the sliding stroke of the valve plate 2, improving the switching efficiency of the valve plate 2 between the first position and the second position, avoiding the valve plate 2 from getting stuck, and extending the service life of the valve plate 2.

[0070] In other embodiments, a gas gap is provided between the peripheral wall of the valve disc 2 and the peripheral wall of the first air passage 121. In the second position, the gas gap communicates with the air passage, allowing the enthalpy-increasing gas injected through the limiting protrusion 1211 to sequentially pass through the gas gap and the air passage into the connecting port. In this embodiment, when the valve disc 2 is in the second position, gas entering from the air inlet first passes through the gas gap, then through the air passage into the connecting hole, and finally enters the compression chamber through the second air passage 122.

[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The fixed scroll of the scroll compressor includes: The main body (1) is provided with a vortex chamber (111) and an enthalpy-increasing channel (12), and the jet enthalpy-increasing gas enters the vortex chamber (111) through the enthalpy-increasing channel (12); The invention is characterized in that the enthalpy-increasing channel (12) comprises a first air channel (121), the first air channel (121) is arranged along a preset direction (Z), a limiting convex ring (1211) is convexly provided on the inner peripheral wall of the first air channel (121), and one end of the first air channel (121) is located below the limiting convex ring (1211) along the preset direction (Z) and serves as an air inlet for the jet enthalpy-increasing gas; A valve plate (2), the valve plate (2) is slidably arranged in the first air channel (121) and is located on the side of the limiting protrusion (1211) away from the air inlet, the valve plate (2) has a first position and a second position in the first air channel (121), the first position is located below the second position, in the first position, the valve plate (2) abuts against the limiting protrusion (1211) and closes the first air channel (121), in the second position, the valve plate (2) and the limiting protrusion (1211) are spaced apart and allow the jet enthalpy-increasing gas to pass through the first air channel (121).

2. The fixed scroll of the scroll compressor according to claim 1, characterized in that: The enthalpy-increasing channel (12) further includes a second air channel (122), and a connecting port is provided on the peripheral wall of the first air channel (121), the connecting port being located on a side of the valve plate (2) away from the limiting convex ring (1211), the connecting port being in communication with the second air channel (122), and the second air channel (122) being in communication with the vortex chamber (111).

3. The fixed scroll of the scroll compressor according to claim 2, characterized in that: The body (1) comprises an upper cover (13) and an annular wall (14), wherein the upper cover (13) and the annular wall (14) enclose the vortex chamber (111); The first air channel (121) is located on the annular wall (14), and the second air channel (122) is located on the upper cover (13).

4. The fixed scroll of the scroll compressor according to claim 2, wherein: The other end of the first air channel (121) is located on the upper end surface of the body (1) along the preset direction (Z); The valve body (121) further comprises a blocking end cover (3), the blocking end cover (3) being inserted into the other end of the first air passage (121), the lower end surface of the blocking end cover (3) limiting the valve plate (2) to the second position, the blocking end cover (3) comprising a fixing portion (31) and a limiting portion (32) fixed to each other, the fixing portion (31) being fixed to the body (1), and the peripheral wall of the limiting portion (32) and the peripheral wall of the first air passage (121) forming an air passage; The valve plate (2) is provided with a through hole (21), and in the second position, the through hole (21) is communicated with the air passage, so that the jet enthalpy-increasing gas passing through the limiting convex ring (1211) can sequentially pass through the through hole (21) and the air passage into the connecting port; Alternatively, an air gap is provided between the peripheral wall of the valve plate (2) and the peripheral wall of the first air duct (121), and in the second position, the air gap is connected to the air duct, so that the jet enthalpy-increasing gas passing through the limiting convex ring (1211) can enter the connecting port through the air gap and the air duct in sequence.

5. The fixed scroll of the scroll compressor according to claim 2, characterized in that: The other end of the first air channel (121) is located on the upper end surface of the body (1) along the preset direction (Z); The invention also includes a blocking end cover (3), which is inserted into the other end of the first air channel (121), and the lower end surface of the blocking end cover (3) limits the valve plate (2) to the second position, and the valve plate (2) is located below the blocking end cover (3), and the lower end surface of the blocking end cover (3) is recessed with a blind hole (321) connected to the first air channel (121), and the peripheral wall of the blocking end cover (3) is provided with a through hole (322), and the through hole (322) connects the blind hole (321) with the connecting port, and the valve plate (2) is provided with a through hole (21). In the second position, the jet enthalpy-increasing gas passing through the limiting convex ring (1211) can enter the blind hole (321) through the through hole (21).

6. The fixed scroll of the scroll compressor according to claim 5, characterized in that: The valve plate (2) has a contact surface (23) that abuts against the lower end surface of the blocking end cover (3), and along the radial direction of the valve plate (2), the through hole (21) is located on the inner side of the contact surface (23).

7. The fixed scroll of the scroll compressor according to claim 4 or 5, characterized in that: It also includes an elastic member, which is arranged between the valve plate (2) and the blocking end cover (3) and abuts against the valve plate (2) and the blocking end cover (3) respectively, and the elastic member is in a free state and the valve plate (2) is in the first position.

8. The fixed scroll of the scroll compressor according to claim 1, wherein: The edge of the valve plate (2) is provided with a flange, and the flange is in contact with the peripheral wall of the first air channel (121).

9. The fixed scroll of a scroll compressor according to any one of claims 1 to 6, characterized in that: The limiting convex ring (1211) is provided with a through hole capable of communicating with the first air channel (121); The valve plate (2) is provided with a protrusion (22) that matches the through hole. At the first position, the protrusion (22) is inserted into the through hole and closes the through hole.

10. A scroll compressor, characterized in that A fixed scroll plate of a scroll compressor comprising any one of claims 1 to 9.

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