Scroll compressor and refrigeration equipment

Abstract

The utility model provides a scroll compressor and refrigeration equipment, the scroll compressor comprises: a compression structure, the compression structure comprises a compression cavity and an advanced exhaust hole, the advanced exhaust hole can be communicated with the compression cavity; the back pressure plate is arranged on the compression structure, and a limiting surface is arranged on one side, facing the compression cavity, of the back pressure plate; the in-advance exhaust valve is arranged between the back pressure plate and the compression structure and located at the end, away from the compression cavity, of the in-advance exhaust hole, and the in-advance exhaust valve can open or close the in-advance exhaust hole; in the axial direction of the back pressure plate, at least one part of the limiting surface is opposite to the advanced exhaust valve, so that the number of parts of the scroll compressor is remarkably reduced, the mounting steps are simplified, the assembly efficiency of the scroll compressor is improved, and the production cost of the scroll compressor is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of scroll compressor equipment, and more specifically, to a scroll compressor and a refrigeration device. Background Technology

[0002] Currently, scroll compressors in related technologies have a pressure relief valve assembly installed in the recessed area on the back of the stationary scroll plate to allow for early exhaust from the compression chamber and reduce overcompression losses. Therefore, this process involves installing both a back pressure plate assembly and a pressure relief valve assembly in the recessed area on the back of the stationary scroll plate, resulting in numerous parts and a complex installation procedure.

[0003] Furthermore, pressure relief valve assemblies typically include a pressure relief valve plate, a pressure relief valve baffle, and fasteners. During assembly, the pressure relief valve plate is sandwiched between the stationary scroll and the pressure relief valve baffle, and then secured with fasteners. Since the recessed area on the back of the stationary scroll is generally flat, it is difficult to position the pressure relief valve plate correctly, which can easily lead to misalignment and poor sealing, or misalignment with the pressure relief valve baffle, resulting in increased opening resistance for the pressure relief valve plate. Utility Model Content

[0004] The embodiments of this utility model are intended to at least solve one of the technical problems existing in the prior art.

[0005] Therefore, a first aspect of the embodiments of the present invention provides a scroll compressor.

[0006] A second aspect of the present invention provides a refrigeration device.

[0007] In view of the above, according to a first aspect of the present invention, a scroll compressor is provided, the scroll compressor comprising: a compression structure, the compression structure including a compression chamber and a pre-exhaust port, the pre-exhaust port being able to communicate with the compression chamber; a back pressure plate disposed on the compression structure, the back pressure plate having a limiting surface on the side facing the compression chamber; and a pre-exhaust valve disposed between the back pressure plate and the compression structure, and located at the end of the pre-exhaust port away from the compression chamber, the pre-exhaust valve being able to open or close the pre-exhaust port; wherein, along the axial direction of the back pressure plate, at least a portion of the limiting surface is disposed opposite to the pre-exhaust valve.

[0008] The scroll compressor provided in this embodiment of the utility model includes a compression structure, a back pressure plate, and an advance exhaust valve. Specifically, the compression structure includes a compression chamber. Optionally, the compression structure includes a stationary disc and a moving disc, which together form the compression chamber. The stationary disc is provided with an exhaust port, which is connected to the compression chamber. Specifically, during the operation of the scroll compressor, the moving disc rotates relative to the stationary disc to compress the gas in the compression chamber. When the pressure of the compressed gas reaches the exhaust pressure, it is discharged from the exhaust port.

[0009] During the operation of a scroll compressor, when the gas pressure in the compression chamber is high, to avoid overcompression, the pre-venting valve can be opened to release some gas through the pre-venting port, thereby achieving early venting of the compression chamber and reducing overcompression losses. In other words, the pre-venting port is a pressure relief port, and the pre-venting valve is a pressure relief valve.

[0010] Furthermore, scroll compressors generally include bypass and non-bypass operating modes. When the scroll compressor operates in bypass mode, the advance discharge valve opens the advance discharge port, allowing the compression chamber to connect with the bypass chamber through the advance discharge port. The bypass chamber also connects to the suction chamber of the scroll compressor, thereby prematurely discharging some gas and reducing displacement, cooling capacity, and energy consumption. In other words, the advance discharge port is a bypass port, and the advance discharge valve is a bypass valve.

[0011] The pressure relief components in related technologies generally include a pressure relief valve plate (pressure relief valve or bypass valve), a limiter, and screws. The pressure relief valve plate and the limiter are fixed to the stationary plate by screws. The pressure relief valve plate is sandwiched between the limiter and the stationary plate. The limiter is used to limit the opening angle of the pressure relief valve plate, thereby preventing the pressure relief valve plate from bending excessively and breaking, which helps to extend the service life of the pressure relief valve plate.

[0012] Since at least part of the limiting surface is opposite to the pre-venting valve along the axial direction of the back pressure plate, that is, the limiter used to limit the opening angle of the pressure relief valve and / or bypass valve is integrated on the back pressure plate, it is possible to avoid excessive bending of the pressure relief valve and / or bypass valve when the scroll compressor pre-vents, while significantly reducing the number of parts of the scroll compressor, simplifying the installation steps, and thus improving the assembly efficiency of the scroll compressor and reducing the production cost of the scroll compressor.

[0013] Furthermore, by integrating the limiter used to restrict the opening angle of the pre-venting valve (pressure relief valve and / or bypass valve) into the back pressure plate, the pre-venting valve can be positioned during installation, improving its assembly accuracy. This effectively solves the problem of misalignment caused by difficulties in positioning the pre-venting valve, preventing poor sealing when closing the pre-venting orifice and improving sealing reliability. Additionally, it avoids the problem of excessive opening resistance of the pre-venting valve when the scroll compressor discharges pre-venting due to misalignment between the pre-venting valve and the limiting surface, ensuring the efficiency of the scroll compressor.

[0014] In some technical solutions, optionally, at least a portion of the limiting surface extends obliquely toward the side opposite to the pre-venting valve.

[0015] In this technical solution, since at least part of the limiting surface extends inclined away from the side of the pre-venting valve, it provides room for the pre-venting valve to move, ensuring that the pre-venting valve can effectively open the pre-venting port and achieve pre-venting during the operation of the scroll compressor. At the same time, the limiting surface restricts the opening angle of the pre-venting valve during pre-venting, preventing excessive bending of the valve, which helps extend its service life and improves the reliability of the scroll compressor.

[0016] In some technical solutions, the limiting surface may optionally include a first limiting segment and a second limiting segment, wherein at least a portion of the first limiting segment is constructed as a plane, the second limiting segment is connected to the first limiting segment, and the end of the second limiting segment away from the first limiting segment extends obliquely toward the side opposite to the pre-exhaust valve.

[0017] In this technical solution, the limiting surface is defined as including a first limiting segment and a second limiting segment. Specifically, the second limiting segment is connected to the first limiting segment. At least a portion of the first limiting segment is a plane, and the end of the second limiting segment away from the first limiting segment extends obliquely. That is, a portion of the limiting surface extends obliquely away from the side of the pre-venting valve, thereby providing room for the pre-venting valve to move and ensuring that the pre-venting valve can effectively open the pre-venting port, while further preventing the pre-venting valve from bending excessively.

[0018] In some technical solutions, optionally, the pre-venting valve includes a connecting part and a valve body, wherein the valve body is connected to the connecting part and the valve body is opposite to the pre-venting port. Along the axial direction of the back pressure plate, at least a portion of the connecting part is opposite to the first limiting section, and at least a portion of the valve body is opposite to the second limiting section.

[0019] In this technical solution, the pre-venting valve is defined as including a connecting part and a valve body. Specifically, along the axial direction of the back pressure plate, at least a portion of the connecting part is opposite to the first limiting section, and at least a portion of the valve body is opposite to the second limiting section. That is, at least a portion of the connecting part corresponds to a plane, and at least a portion of the valve body corresponds to an inclined plane and is opposite to the pre-venting hole. This achieves root compression of the pre-venting valve and provides movement space for the head of the pre-venting valve. This ensures that the pre-venting valve can effectively open the pre-venting hole while avoiding excessive bending of the pre-venting valve, which is beneficial to further extend the service life of the pre-venting valve.

[0020] In some technical solutions, the back pressure plate may optionally include a plate body and a mounting portion, wherein the mounting portion is located on the side of the plate body facing the compression chamber, the mounting portion divides the space between the plate body and the compression structure into an exhaust chamber and a bypass chamber, the bypass chamber is located outside the exhaust chamber along the radial direction of the back pressure plate, the exhaust chamber is connected to the compression chamber, and the limiting surface is located within at least one of the exhaust chamber and the bypass chamber.

[0021] In this technical solution, the back pressure plate is defined to include a plate body and a mounting part. Specifically, the mounting part is disposed on the side of the plate body facing the compression chamber, and the mounting part divides the space between the plate body and the compression structure into a bypass chamber and an exhaust chamber, wherein the bypass chamber is located radially outside the exhaust chamber.

[0022] The limiting surface is located within at least one of the exhaust chamber and the bypass chamber. Specifically, if the limiting surface is located within the bypass chamber, the pre-exhaust port is a bypass port, and the pre-exhaust valve is a bypass valve. Alternatively, if the limiting surface is located within the exhaust chamber, the pre-exhaust port is a pressure relief port, and the pre-exhaust valve is a pressure relief valve. Alternatively, there may be two limiting surfaces, one located within the bypass chamber and corresponding to the bypass valve, and the other located within the exhaust chamber and corresponding to the pressure relief valve.

[0023] Since the limiting surface is opposite to the pressure relief valve and / or bypass valve, the limiter used to limit the opening angle of the pressure relief valve and / or bypass valve is integrated into the back pressure plate, which can significantly reduce the number of parts of the scroll compressor, simplify the installation steps, and thus help improve the assembly efficiency of the scroll compressor and reduce the production cost of the scroll compressor.

[0024] Furthermore, the pre-venting valve can be positioned during installation, improving its assembly accuracy and effectively solving the problem of misaligned installation caused by difficulties in positioning the pre-venting valve, thus enhancing sealing reliability. Additionally, it avoids the problem of excessive opening resistance of the pre-venting valve.

[0025] In some technical solutions, optionally, the limiting surface includes a first limiting surface located within the bypass cavity; the pre-venting port includes a bypass hole, the pre-venting valve includes a bypass valve, the bypass valve can open or close the bypass hole so that the bypass hole communicates with or is cut off from the bypass cavity, and the first limiting surface and the bypass valve are arranged opposite to each other along the axial direction of the back pressure plate.

[0026] In this technical solution, the pre-discharge valve is defined as including a bypass valve, and the pre-discharge port is defined as including a bypass port. Specifically, when the scroll compressor is running in bypass mode, the bypass valve opens the bypass port, so that the compression chamber is connected to the bypass chamber through the bypass port, and the bypass chamber is connected to the suction chamber of the scroll compressor, thereby discharging some gas in advance and achieving the purpose of reducing displacement, cooling capacity and energy consumption.

[0027] Since at least part of the first limiting surface is opposite to the bypass valve along the axial direction of the back pressure plate, that is, the limiter used to limit the opening angle of the bypass valve is integrated on the back pressure plate, the number of parts of the scroll compressor can be significantly reduced, the installation steps can be simplified, and thus the assembly efficiency of the scroll compressor can be improved and the production cost of the scroll compressor can be reduced.

[0028] Moreover, during installation, the first limiting surface can also position the bypass valve, improve the assembly accuracy of the bypass valve, effectively solve the problem of bypass valve misalignment caused by the difficulty in positioning the bypass valve during installation, improve the sealing reliability in non-bypass operation, and reduce the opening resistance of the bypass valve in bypass operation.

[0029] In some technical solutions, the mounting part may optionally include a first outer edge surface, which extends axially along the back pressure plate and has an outer diameter smaller than the outer diameter of the plate body; the first outer edge surface forms part of the cavity wall of the bypass cavity, and the first limiting surface is connected to the first outer edge surface.

[0030] In this technical solution, the mounting part is defined to include a first outer edge surface. Specifically, the outer diameter of the first outer edge surface is smaller than the outer diameter of the plate, and the first outer edge surface, the plate, and the compression structure enclose a bypass cavity.

[0031] Since the first limiting surface is connected to the first outer edge surface, that is, the first limiting surface is close to the inner side of the plate, it can limit the opening angle of the bypass valve, reduce the number of parts, and at the same time avoid the first limiting surface occupying too much of the bypass cavity area, thus ensuring the flow path of gas in the bypass condition of the scroll compressor.

[0032] Furthermore, since the first limiting surface is connected to the first outer edge surface, compared to the gap between the first limiting surface and the first outer edge surface, it can prevent some gas from being stored in the gap between the first limiting surface and the first outer edge surface during the bypass operation of the scroll compressor, thus ensuring bypass efficiency.

[0033] In some technical solutions, the mounting part may optionally include a second outer edge surface, which extends along the axial direction of the back pressure plate and has an outer diameter equal to the outer diameter of the plate body; along the circumferential direction of the back pressure plate, the first outer edge surface includes a first outer edge portion and a second outer edge portion connected together, the first outer edge portion being closer to the second outer edge surface than the second outer edge portion, and the first limiting surface being connected to the first outer edge portion.

[0034] In this technical solution, the mounting part is further defined as including a second outer edge surface, specifically, the outer diameter of the second outer edge surface is equal to the outer diameter of the plate.

[0035] Understandably, when the scroll compressor operates in bypass mode, the bypass valve opens the bypass orifice, allowing gas in the compression chamber to enter the bypass chamber through the bypass orifice and flow out of the bypass chamber along the channel formed by the second outer edge and the compression structure, thus achieving early exhaust. Since the first limiting surface is connected to the first outer edge, meaning it is positioned close to the second outer edge, the opening angle of the bypass valve can be limited, reducing the number of components while avoiding affecting the gas flow of the scroll compressor in bypass mode, ensuring bypass efficiency.

[0036] In some technical solutions, the mounting part may optionally include a first flow surface, which is connected to the second outer edge surface and extends along the axial direction of the back pressure plate. The back pressure plate may also include a second flow surface, which is connected to the first limiting surface and extends along the axial direction of the back pressure plate. Along the circumference of the back pressure plate, the first flow surface is located between the second outer edge surface and the second flow surface, and the second flow surface is connected to the first flow surface, with the connection point being tangent.

[0037] In this technical solution, the mounting part is further defined as including a first flow surface, and the back pressure plate is further defined as including a second flow surface. Specifically, along the circumference of the back pressure plate, the first flow surface is located between the second outer edge surface and the second flow surface, and the first flow surface is connected to the second outer edge surface.

[0038] Since the first flow surface and the second flow surface are connected and the connection point of the first flow surface and the second flow surface is tangent, that is, the connection point of the first flow surface and the second flow surface is smoothly transitioned. Therefore, when the scroll compressor is running in bypass mode, the gas is prevented from generating eddies at this point, which helps to optimize the gas flow path, reduce the gas flow resistance, reduce power loss, and thus help to improve the overall efficiency of the scroll compressor.

[0039] In some technical solutions, optionally, the limiting surface includes a second limiting surface located inside the exhaust chamber; the advance exhaust port includes a pressure relief port, the advance exhaust valve includes a pressure relief valve, the pressure relief valve can open or close the pressure relief port so that the pressure relief port communicates with or is cut off from the exhaust chamber, and the second limiting surface is arranged opposite to the pressure relief valve along the axial direction of the back pressure plate.

[0040] In this technical solution, since the second limiting surface is opposite to the pressure relief valve along the axial direction of the back pressure plate, that is, the limiter used to limit the opening angle of the pressure relief valve is integrated on the back pressure plate, the number of parts of the scroll compressor can be significantly reduced, the installation steps can be simplified, and thus the assembly efficiency of the scroll compressor can be improved and the production cost of the scroll compressor can be reduced.

[0041] Furthermore, during installation, the limiting surface can also position the pressure relief valve, improving the assembly accuracy of the pressure relief valve. This effectively solves the problem of misaligned installation of the pressure relief valve due to the difficulty in positioning it during installation, improves the sealing reliability when not under pressure relief, and reduces the opening resistance of the pressure relief valve when under pressure relief.

[0042] In some technical solutions, the back pressure plate may optionally include an exhaust channel, which is connected to the exhaust chamber, and at least a portion of the second limiting surface is offset from the exhaust channel along the axial direction of the back pressure plate.

[0043] In this technical solution, since at least part of the second limiting surface and the exhaust passage are offset in the axial direction of the back pressure plate, it is possible to reduce the number of parts and avoid the pressure relief valve installation offset while not affecting the exhaust of the scroll compressor, which is conducive to ensuring the stability and reliability of the scroll compressor operation.

[0044] In some technical solutions, the scroll compressor may optionally include a gasket, which is disposed between the mounting part and the compression structure and arranged around the exhaust chamber; wherein the gasket is connected to the pre-exhaust valve.

[0045] In this technical solution, since the sealing gasket and the pre-vent valve are connected, that is, in addition to integrating the limiter used to limit the opening angle of the pre-vent valve into the back pressure plate, the pre-vent valve is integrated into the sealing gasket. This can further reduce the number of parts of the scroll compressor, simplify the installation steps, and thus help improve the assembly efficiency of the scroll compressor and reduce the production cost of the scroll compressor.

[0046] Moreover, during installation, there is no need to use auxiliary tools to position the pre-venting valve. Simply place the sealing gasket between the back pressure plate and the compression structure, and align the pre-venting valve with the limiting surface to achieve accurate positioning of the pre-venting valve, avoid misalignment, and ensure the assembly accuracy and sealing reliability of the pre-venting valve.

[0047] In some technical solutions, the sealing gasket and the pre-venting valve can optionally be integrated into one structure.

[0048] In this technical solution, since the sealing gasket and the pre-venting valve are integrated into one structure, it is understood that this integrated structure has excellent mechanical properties. Therefore, it can improve the connection strength between the sealing gasket and the pre-venting valve, ensuring the installation reliability of the pre-venting valve. Furthermore, the integrated structure can further reduce the number of parts in the scroll compressor, simplify the installation steps, and help to further reduce the production cost of the scroll compressor. It also helps to improve the assembly accuracy and sealing reliability of the pre-venting valve.

[0049] In some technical solutions, optionally, the side of the mounting part facing the compression chamber is also provided with a sealing surface, and the sealing gasket is provided between the sealing surface and the compression structure; wherein, along the axial direction of the back pressure plate, the limiting surface does not extend beyond the sealing surface.

[0050] In this technical solution, since the limiting surface does not extend beyond the sealing surface in the axial direction of the back pressure plate, it is possible to limit the opening angle of the pre-exhaust valve, avoid excessive bending of the pre-exhaust valve, and ensure the sealing performance of the gasket location, thereby preventing gas leakage between the bypass chamber and the exhaust chamber and further improving the reliability of the scroll compressor.

[0051] In some technical solutions, the compression structure may optionally include a moving disc and a stationary disc, wherein the stationary disc and the moving disc form a compression chamber, a back pressure plate is located on the side of the stationary disc away from the moving disc, the stationary disc is provided with an early exhaust hole, an early exhaust valve is located between the back pressure plate and the stationary disc, and a limiting surface is provided on the side of the back pressure plate facing the stationary disc.

[0052] In this technical solution, the back pressure plate is located on the side of the stationary disc away from the moving disc, and the back pressure plate and the stationary disc enclose a bypass cavity. Optionally, the scroll compressor also includes a float assembly, which is located on the back pressure plate, and the float assembly, the back pressure plate, and the stationary disc enclose a back pressure cavity. The back pressure cavity can communicate with the compression cavity, thereby introducing intermediate pressure into the back pressure cavity during the operation of the scroll compressor. This intermediate pressure can apply axial force to the stationary disc in the axial direction to ensure reliable meshing between the stationary disc and the moving disc, prevent radial leakage between the stationary disc and the moving disc, and improve the reliability of the scroll compressor.

[0053] The pre-venting port is located on the stationary plate, and the pre-venting valve is located between the back pressure plate and the stationary plate. The back pressure plate has a limiting surface on the side facing the stationary plate. In other words, the pre-venting valve is sandwiched between the pre-venting port and the limiting surface on the stationary plate to limit the opening angle of the pre-venting valve when venting in advance, avoid excessive bending of the pre-venting valve, and extend the service life of the pre-venting valve.

[0054] According to a second aspect of this utility model, a refrigeration device is provided, including a scroll compressor as provided in any of the above technical solutions, and thus possesses all the beneficial technical effects of the scroll compressor, which will not be repeated here.

[0055] Additional aspects and advantages of the present invention will be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of the present invention. Attached Figure Description

[0056] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0057] Figure 1 One of the structural schematic diagrams of a back pressure plate according to an embodiment of the present invention is shown;

[0058] Figure 2 A second schematic diagram of the structure of a back pressure plate according to an embodiment of the present invention is shown;

[0059] Figure 3 A third schematic diagram of the structure of a back pressure plate according to an embodiment of the present invention is shown;

[0060] Figure 4The fourth schematic diagram shows the structure of a back pressure plate according to an embodiment of the present invention;

[0061] Figure 5 A schematic diagram of the structure of a sealing gasket according to an embodiment of the present invention is shown;

[0062] Figure 6 A partial structural schematic diagram of a scroll compressor according to an embodiment of the present invention is shown;

[0063] Figure 7 A schematic diagram of a scroll compressor according to an embodiment of the present invention is shown.

[0064] in, Figures 1 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0065] 100 Scroll compressor, 110 Compression structure, 111 Compression chamber, 112 Pre-exhaust port, 113 Bypass port, 114 Pressure relief port, 115 Moving plate, 116 Stationary plate, 120 Back pressure plate, 121 Limiting surface, 122 First limiting section, 123 Second limiting section, 124 Plate, 125 Mounting part, 126 First limiting surface, 127 First flow surface, 128 Second flow surface, 129 Exhaust chamber, 130 Pre-exhaust valve, 131 Bypass valve, 132 Pressure relief valve, 133 Connecting part, 134 Valve body, 140 Bypass chamber, 150 Exhaust passage, 160 Sealing gasket, 170 Sealing surface, 180 First outer edge surface, 181 First outer edge, 182 Second outer edge, 190 Second outer edge surface, 210 Intake chamber. Detailed Implementation

[0066] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0067] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0068] The following reference Figures 1 to 7 This invention describes a scroll compressor 100 and a refrigeration device provided according to some embodiments of the present invention.

[0069] In one embodiment according to this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, a scroll compressor 100 is proposed. The scroll compressor 100 includes: a compression structure 110, which includes a compression chamber 111 and a pre-exhaust port 112, the pre-exhaust port 112 being able to communicate with the compression chamber 111; a back pressure plate 120, disposed on the compression structure 110, the back pressure plate 120 having a limiting surface 121 on the side facing the compression chamber 111; and a pre-exhaust valve 130, disposed between the back pressure plate 120 and the compression structure 110, and located at the end of the pre-exhaust port 112 away from the compression chamber 111, the pre-exhaust valve 130 being able to open or close the pre-exhaust port 112; wherein, along the axial direction of the back pressure plate 120, at least a portion of the limiting surface 121 is disposed opposite to the pre-exhaust valve 130.

[0070] The scroll compressor 100 provided in this embodiment of the present invention includes a compression structure 110, a back pressure plate 120, and an advance exhaust valve 130. Specifically, the compression structure 110 includes a compression chamber 111. Optionally, the compression structure 110 includes a stationary disc 116 and a moving disc 115, which together form the compression chamber 111. The stationary disc 116 is provided with an exhaust port, which communicates with the compression chamber 111. Specifically, during the operation of the scroll compressor 100, the moving disc 115 rotates relative to the stationary disc 116 to compress the gas in the compression chamber 111. When the pressure of the compressed gas reaches the exhaust pressure, it is discharged from the exhaust port.

[0071] During the operation of the scroll compressor 100, when the gas pressure in the compression chamber 111 is high, in order to avoid overcompression, the advance venting valve 130 can be opened to discharge some gas through the advance venting port 112, thereby achieving the purpose of early venting of the compression chamber 111 and reducing overcompression losses. That is, the advance venting port 112 is a pressure relief port 114, and the advance venting valve 130 is a pressure relief valve 132.

[0072] Furthermore, the scroll compressor 100 generally includes bypass and non-bypass operating conditions. When the scroll compressor 100 operates in bypass condition, the advance discharge valve 130 opens the advance discharge port 112, allowing the compression chamber 111 to connect with the bypass chamber 140 through the advance discharge port 112. The bypass chamber 140 also connects to the suction chamber 210 of the scroll compressor 100, thereby prematurely discharging some gas and achieving the purpose of reducing displacement, cooling capacity, and energy consumption. That is, the advance discharge port 112 is a bypass port 113, and the advance discharge valve 130 is a bypass valve 131.

[0073] The pressure relief components in related technologies generally include a pressure relief valve plate (pressure relief valve 132 or bypass valve 131), a limiter, and screws. The pressure relief valve plate and the limiter are fixed to the stationary plate 116 by screws. The pressure relief valve plate is sandwiched between the limiter and the stationary plate 116. The limiter is used to limit the opening angle of the pressure relief valve plate, thereby preventing the pressure relief valve plate from bending excessively and breaking, which helps to extend the service life of the pressure relief valve plate.

[0074] Since at least part of the limiting surface 121 is opposite to the pre-discharge valve 130 along the axial direction of the back pressure plate 120, that is, the limiter used to limit the opening angle of the pressure relief valve 132 and / or the bypass valve 131 is integrated on the back pressure plate 120, so that when the scroll compressor 100 discharges pre-discharges, the pressure relief valve 132 and / or the bypass valve 131 can be prevented from being excessively bent, while the number of parts of the scroll compressor 100 is significantly reduced, the installation steps are simplified, and thus the assembly efficiency of the scroll compressor 100 is improved and the production cost of the scroll compressor 100 is reduced.

[0075] Furthermore, by integrating the limiter for restricting the opening angle of the pre-vent valve 130 (pressure relief valve 132 and / or bypass valve 131) onto the back pressure plate 120, the pre-vent valve 130 can be positioned during installation, improving its assembly accuracy. This effectively solves the problem of misalignment of the pre-vent valve 130 due to installation positioning difficulties, and avoids poor sealing when the pre-vent valve 130 closes the pre-vent port 112, thus improving sealing reliability. Additionally, it avoids excessive opening resistance of the pre-vent valve 130 when the scroll compressor 100 performs pre-venting due to installation misalignment between the pre-vent valve 130 and the limiting surface 121, ensuring the efficiency of the scroll compressor 100.

[0076] like Figure 1 and Figure 3 As shown, in some embodiments, optionally, at least a portion of the limiting surface 121 extends obliquely toward the side opposite to the pre-vent valve 130.

[0077] In this embodiment, since at least a portion of the limiting surface 121 extends inclined away from the side opposite to the pre-venting valve 130, it provides room for the pre-venting valve 130 to move, ensuring that the pre-venting valve 130 can effectively open the pre-venting port 112 during the operation of the scroll compressor 100, thereby achieving pre-venting. Simultaneously, the limiting surface 121 restricts the opening angle of the pre-venting valve 130 during pre-venting, preventing excessive bending of the pre-venting valve 130, which helps extend its service life and improves the reliability of the scroll compressor 100.

[0078] like Figure 3As shown, in some embodiments, optionally, the limiting surface 121 includes a first limiting segment 122 and a second limiting segment 123, wherein at least a portion of the first limiting segment 122 is configured as a plane, the second limiting segment 123 is connected to the first limiting segment 122, and one end of the second limiting segment 123 away from the first limiting segment 122 extends obliquely toward the side opposite to the pre-exhaust valve 130.

[0079] In this embodiment, the limiting surface 121 is defined as including a first limiting segment 122 and a second limiting segment 123. Specifically, the second limiting segment 123 is connected to the first limiting segment 122. At least a portion of the first limiting segment 122 is planar, and the end of the second limiting segment 123 away from the first limiting segment 122 extends obliquely. That is, a portion of the limiting surface 121 extends obliquely away from the side of the pre-venting valve 130, thereby providing room for the pre-venting valve 130 to move and ensuring that the pre-venting valve 130 effectively opens the pre-venting port 112, while further preventing the pre-venting valve 130 from bending excessively.

[0080] In some embodiments, the advance venting valve 130 may optionally include a connecting portion 133 and a valve body 134, wherein the valve body 134 is connected to the connecting portion 133 and is opposite to the advance venting port 112. Along the axial direction of the back pressure plate 120, at least a portion of the connecting portion 133 is opposite to the first limiting section 122, and at least a portion of the valve body 134 is opposite to the second limiting section 123.

[0081] In this embodiment, the pre-venting valve 130 is defined to include a connecting portion 133 and a valve body 134. Specifically, along the axial direction of the back pressure plate 120, at least a portion of the connecting portion 133 is opposite to the first limiting segment 122, and at least a portion of the valve body 134 is opposite to the second limiting segment 123. That is, at least a portion of the connecting portion 133 corresponds to a plane, and at least a portion of the valve body 134 corresponds to an inclined plane and is opposite to the pre-venting hole 112. This achieves root compression of the pre-venting valve 130 and provides movement space for the head of the pre-venting valve 130, ensuring that the pre-venting valve 130 effectively opens the pre-venting hole 112 while avoiding excessive bending of the pre-venting valve 130, which is beneficial to further extend the service life of the pre-venting valve 130.

[0082] In some embodiments, the back pressure plate 120 may optionally include a plate body 124 and a mounting portion 125, wherein the mounting portion 125 is disposed on the side of the plate body 124 facing the compression chamber 111, and the mounting portion 125 divides the space between the plate body 124 and the compression structure 110 into an exhaust chamber 129 and a bypass chamber 140. Along the radial direction of the back pressure plate 120, the bypass chamber 140 is located outside the exhaust chamber 129, the exhaust chamber 129 communicates with the compression chamber 111, and the limiting surface 121 is located within at least one of the exhaust chamber 129 and the bypass chamber 140.

[0083] In this embodiment, the back pressure plate 120 is defined as including a plate body 124 and a mounting portion 125. Specifically, the mounting portion 125 is disposed on the side of the plate body 124 facing the compression chamber 111, and the mounting portion 125 divides the space between the plate body 124 and the compression structure 110 into a bypass chamber 140 and an exhaust chamber 129, wherein the bypass chamber 140 is located radially outside the exhaust chamber 129.

[0084] The limiting surface 121 is located in at least one of the exhaust chamber 129 and the bypass chamber 140. Specifically, the limiting surface 121 is located in the bypass chamber 140, in which case the advance exhaust port 112 is a bypass port 113 and the advance exhaust valve 130 is a bypass valve 131. Alternatively, the limiting surface 121 is located in the exhaust chamber 129, in which case the advance exhaust port 112 is a pressure relief port 114 and the advance exhaust valve 130 is a pressure relief valve 132. Alternatively, there are two limiting surfaces 121, one of which is located in the bypass chamber 140 and is used to oppose the bypass valve 131, and the other of which is located in the exhaust chamber 129 and is used to oppose the pressure relief valve 132.

[0085] Since the limiting surface 121 is opposite to the pressure relief valve 132 and / or the bypass valve 131, the limiter used to limit the opening angle of the pressure relief valve 132 and / or the bypass valve 131 is integrated on the back pressure plate 120, which can significantly reduce the number of parts of the scroll compressor 100, simplify the installation steps, and thus help improve the assembly efficiency of the scroll compressor 100 and reduce the production cost of the scroll compressor 100.

[0086] Furthermore, the pre-venting valve 130 can be positioned during installation, improving its assembly accuracy and effectively solving the problem of misalignment caused by difficulty in positioning it, thus enhancing sealing reliability. Additionally, it avoids the problem of excessive opening resistance of the pre-venting valve 130.

[0087] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, in some embodiments, optionally, the limiting surface 121 includes a first limiting surface 126, which is located within the bypass cavity 140; the pre-venting port 112 includes a bypass port 113, and the pre-venting valve 130 includes a bypass valve 131, which can open or close the bypass port 113 to allow the bypass port 113 to communicate with or be cut off from the bypass cavity 140. Along the axial direction of the back pressure plate 120, the first limiting surface 126 and the bypass valve 131 are disposed opposite to each other.

[0088] In this embodiment, the pre-discharge valve 130 is defined to include a bypass valve 131, and the pre-discharge port 112 includes a bypass port 113. Specifically, when the scroll compressor 100 is running in bypass mode, the bypass valve 131 opens the bypass port 113, so that the compression chamber 111 is connected to the bypass chamber 140 through the bypass port 113, and the bypass chamber 140 is connected to the suction chamber 210 of the scroll compressor 100, thereby discharging some gas in advance and achieving the purpose of reducing displacement, cooling capacity and energy consumption.

[0089] Since at least part of the first limiting surface 126 is opposite to the bypass valve 131 along the axial direction of the back pressure plate 120, that is, the limiter used to limit the opening angle of the bypass valve 131 is integrated on the back pressure plate 120, the number of parts of the scroll compressor 100 can be significantly reduced, the installation steps can be simplified, and thus the assembly efficiency of the scroll compressor 100 can be improved and the production cost of the scroll compressor 100 can be reduced.

[0090] Moreover, during installation, the first limiting surface 126 can also position the bypass valve 131, improve the assembly accuracy of the bypass valve 131, effectively solve the problem of the bypass valve 131 being misaligned due to the difficulty in installing and positioning the bypass valve 131, improve the sealing reliability in non-bypass operation, and reduce the opening resistance of the bypass valve 131 in bypass operation.

[0091] In some embodiments, the mounting portion 125 may optionally include a first outer edge surface 180, which extends axially along the back pressure plate 120 and has an outer diameter smaller than the outer diameter of the plate body 124; the first outer edge surface 180 forms part of the cavity wall of the bypass cavity 140, and the first limiting surface 126 is connected to the first outer edge surface 180.

[0092] In this embodiment, the mounting portion 125 is defined to include a first outer edge surface 180. Specifically, the outer diameter of the first outer edge surface 180 is smaller than the outer diameter of the plate 124, and the first outer edge surface 180, the plate 124, and the compression structure 110 enclose a bypass cavity 140.

[0093] Since the first limiting surface 126 is connected to the first outer edge surface 180, that is, the first limiting surface 126 is close to the inner side of the plate 124, it can limit the opening angle of the bypass valve 131, reduce the number of parts, and at the same time avoid the first limiting surface 126 occupying too much area of ​​the bypass cavity 140, thus ensuring the flow path of gas in the bypass condition of the scroll compressor 100.

[0094] Furthermore, since the first limiting surface 126 is connected to the first outer edge surface 180, compared to the gap between the first limiting surface 126 and the first outer edge surface 180, it can prevent some gas from being stored in the gap between the first limiting surface 126 and the first outer edge surface 180 during the bypass operation of the scroll compressor 100, thus ensuring bypass efficiency.

[0095] In some embodiments, the mounting portion 125 may optionally include a second outer edge surface 190, which extends axially along the back pressure plate 120 and has an outer diameter equal to the outer diameter of the plate body 124; along the circumferential direction of the back pressure plate 120, the first outer edge surface 180 includes a first outer edge portion 181 and a second outer edge portion 182 connected together, the first outer edge portion 181 being closer to the second outer edge surface 190 than the second outer edge portion 182, and the first limiting surface 126 being connected to the first outer edge portion 181.

[0096] In this embodiment, the mounting portion 125 is further defined as including a second outer edge surface 190, specifically, the outer diameter of the second outer edge surface 190 is equal to the outer diameter of the plate 124.

[0097] Understandably, when the scroll compressor 100 operates in bypass mode, the bypass valve 131 opens the bypass port 113, allowing gas in the compression chamber 111 to enter the bypass chamber 140 through the bypass port 113 and flow out of the bypass chamber 140 along the channel formed by the second outer edge 182 and the compression structure 110, thus achieving early exhaust. Since the first limiting surface 126 is connected to the first outer edge 181, meaning the first limiting surface 126 is positioned close to the second outer edge 190, it can limit the opening angle of the bypass valve 131, reducing the number of components while avoiding affecting the gas flow of the scroll compressor 100 in bypass mode, ensuring bypass efficiency.

[0098] Optionally, the plate 124 and the mounting part 125 are an integral structure.

[0099] like Figure 1 and Figure 3 As shown, in some embodiments, optionally, the mounting portion 125 further includes a first flow surface 127, which is connected to the second outer edge surface 190 and extends along the axial direction of the back pressure plate 120. The back pressure plate 120 also includes a second flow surface 128, which is connected to the first limiting surface 126 and extends along the axial direction of the back pressure plate 120. Along the circumferential direction of the back pressure plate 120, the first flow surface 127 is located between the second outer edge surface 190 and the second flow surface 128. The second flow surface 128 is connected to the first flow surface 127, and the connection is tangent.

[0100] In this embodiment, the mounting portion 125 further includes a first flow surface 127, and the back pressure plate 120 further includes a second flow surface 128. Specifically, the first flow surface 127 and the second flow surface 128 extend along the axial direction of the back pressure plate 120, that is, the first flow surface 127 and the second flow surface 128 are sidewalls. Along the circumferential direction of the back pressure plate 120, the first flow surface 127 is located between the second outer edge surface 190 and the second flow surface 128, and the first flow surface 127 is connected to the second outer edge surface 190.

[0101] Since the first flow surface 127 and the second flow surface 128 are connected and the connection between the first flow surface 127 and the second flow surface 128 is tangent, that is, the connection between the first flow surface 127 and the second flow surface 128 is smoothly transitioned. Thus, when the scroll compressor 100 is running in bypass mode, the gas is prevented from generating eddies at this point, which helps to optimize the gas flow path, reduce the gas flow resistance, reduce power loss, and thus help to improve the overall efficiency of the scroll compressor 100.

[0102] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, optionally, the limiting surface 121 includes a second limiting surface located within the exhaust chamber 129; the advance exhaust port 112 includes a pressure relief port 114, and the advance exhaust valve 130 includes a pressure relief valve 132, which can open or close the pressure relief port 114 to allow the pressure relief port 114 to communicate with or be cut off from the exhaust chamber 129. Along the axial direction of the back pressure plate 120, the second limiting surface is disposed opposite to the pressure relief valve 132.

[0103] In this embodiment, the pre-venting valve 130 is defined to include a pressure relief valve 132, and the pre-venting port 112 includes a pressure relief port 114. Specifically, during the operation of the scroll compressor 100, when the gas pressure in the compression chamber 111 is high, in order to avoid overcompression, the pressure relief valve 132 can be opened, and some gas can be discharged through the pressure relief port 114 to achieve the purpose of pre-venting the compression chamber 111 and reducing overcompression losses.

[0104] Since at least part of the second limiting surface is opposite to the pressure relief valve 132 along the axial direction of the back pressure plate 120, that is, the limiter used to limit the opening angle of the pressure relief valve 132 is integrated on the back pressure plate 120, the number of parts of the scroll compressor 100 can be significantly reduced, the installation steps can be simplified, and thus the assembly efficiency of the scroll compressor 100 can be improved and the production cost of the scroll compressor 100 can be reduced.

[0105] Moreover, during installation, the second limiting surface can also position the pressure relief valve 132, improve the assembly accuracy of the pressure relief valve 132, effectively solve the problem of the pressure relief valve 132 being misaligned due to the difficulty in positioning the pressure relief valve 132 during installation, improve the sealing reliability when not under pressure relief, and reduce the opening resistance of the pressure relief valve 132 when under pressure relief.

[0106] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the back pressure plate 120 may optionally include an exhaust channel 150, which communicates with the exhaust chamber 129. Along the axial direction of the back pressure plate 120, at least a portion of the second limiting surface is offset from the exhaust channel 150.

[0107] In this embodiment, the back pressure plate 120 is further defined as including an exhaust passage 150. Specifically, the exhaust passage 150 is connected to the exhaust chamber 129. Specifically, during the operation of the scroll compressor 100, the moving plate 115 rotates relative to the stationary plate 116 to compress the gas in the compression chamber 111. When the pressure of the compressed gas reaches the exhaust pressure, it is discharged from the exhaust port to the exhaust chamber 129 and then discharged through the exhaust passage 150.

[0108] Since at least part of the second limiting surface and the exhaust passage 150 are offset axially from the back pressure plate 120, it is possible to reduce the number of parts and avoid the pressure relief valve 132 being installed off-center without affecting the exhaust of the scroll compressor 100, which helps to ensure the stability and reliability of the operation of the scroll compressor 100.

[0109] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the scroll compressor 100 may optionally include a gasket 160 disposed between the mounting portion 125 and the compression structure 110 and arranged around the exhaust chamber 129; wherein the gasket 160 is connected to the advance exhaust valve 130.

[0110] In this embodiment, the scroll compressor 100 is further defined as including a sealing gasket 160. Specifically, the sealing gasket 160 is disposed between the back pressure plate 120 and the compression structure 110, and the sealing gasket 160 is disposed around the exhaust chamber 129. It can be understood that the sealing gasket 160 can seal and separate the exhaust chamber 129 and the bypass chamber 140 to prevent gas leakage, which is beneficial to further improving the reliability of the scroll compressor 100.

[0111] Since the gasket 160 is connected to the pre-vent valve 130, that is, except for the limiter used to limit the opening angle of the pre-vent valve 130 being integrated on the back pressure plate 120, the pre-vent valve 130 is integrated on the gasket 160. This further reduces the number of parts in the scroll compressor 100, simplifies the installation steps, and thus helps to improve the assembly efficiency of the scroll compressor 100 and reduce the production cost of the scroll compressor 100.

[0112] Moreover, during installation, there is no need to use auxiliary tools to install and position the pre-venting valve 130. Simply place the sealing gasket 160 between the back pressure plate 120 and the compression structure 110, and align the pre-venting valve 130 with the limiting surface 121 to achieve accurate positioning of the pre-venting valve 130, avoid misalignment, and ensure the assembly accuracy and sealing reliability of the pre-venting valve 130.

[0113] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the sealing gasket 160 and the pre-venting valve 130 are optionally integrated.

[0114] In this embodiment, since the sealing gasket 160 and the pre-venting valve 130 are an integral structure, it is understood that the integral structure has good mechanical properties. Therefore, it can improve the connection strength between the sealing gasket 160 and the pre-venting valve 130, ensuring the installation reliability of the pre-venting valve 130. In addition, the integral structure can further reduce the number of parts of the scroll compressor 100, simplify the installation steps, and help to further reduce the production cost of the scroll compressor 100. It also helps to improve the assembly accuracy and sealing reliability of the pre-venting valve 130.

[0115] like Figure 3 As shown, in some embodiments, optionally, the mounting part 125 is provided with a sealing surface 170 on the side facing the compression chamber 111, and the sealing gasket 160 is provided between the sealing surface 170 and the compression structure 110; wherein, along the axial direction of the back pressure plate 120, the limiting surface 121 does not extend beyond the sealing surface 170.

[0116] In this embodiment, a sealing surface 170 is provided on the side of the back pressure plate 120 facing the compression chamber 111. Specifically, a sealing gasket 160 is disposed between the sealing surface 170 and the compression structure 110. Optionally, the sealing gasket 160 is disposed between the sealing surface 170 and the stationary disc 116.

[0117] Since the limiting surface 121 does not extend beyond the sealing surface 170 in the axial direction of the back pressure plate 120, it is possible to limit the opening angle of the pre-exhaust valve 130 and prevent the pre-exhaust valve 130 from being excessively bent, while ensuring the sealing performance of the gasket 160 and preventing gas leakage between the bypass chamber 140 and the exhaust chamber 129, which is beneficial to further improve the reliability of the scroll compressor 100.

[0118] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in some embodiments, optionally, the compression structure 110 includes a moving disc 115 and a stationary disc 116, wherein the stationary disc 116 and the moving disc 115 form a compression chamber 111, a back pressure plate 120 is disposed on the side of the stationary disc 116 away from the moving disc 115, the stationary disc 116 is provided with an early exhaust hole 112, an early exhaust valve 130 is disposed between the back pressure plate 120 and the stationary disc 116, and a limiting surface 121 is provided on the side of the back pressure plate 120 facing the stationary disc 116.

[0119] In this embodiment, the compression structure 110 is defined as including a moving disk 115 and a stationary disk 116. Specifically, the stationary disk 116 and the moving disk 115 form a compression chamber 111. Optionally, the stationary disk 116 is provided with an exhaust port, which communicates with the compression chamber 111. Specifically, during the operation of the scroll compressor 100, the moving disk 115 rotates relative to the stationary disk 116 to compress the gas in the compression chamber 111. When the pressure of the compressed gas reaches the exhaust pressure, it is discharged from the exhaust port.

[0120] A back pressure plate 120 is disposed on the side of the stationary disc 116 away from the moving disc 115, and the back pressure plate 120 and the stationary disc 116 enclose a bypass cavity 140. Optionally, the scroll compressor 100 also includes a float assembly disposed on the back pressure plate 120, and the float assembly, the back pressure plate 120, and the stationary disc 116 enclose a back pressure cavity. The back pressure cavity can communicate with the compression cavity 111, thereby introducing intermediate pressure into the back pressure cavity during the operation of the scroll compressor 100. This intermediate pressure can apply an axial force to the stationary disc 116 in the axial direction to ensure reliable meshing between the stationary disc 116 and the moving disc 115, prevent radial leakage between the stationary disc 116 and the moving disc 115, and improve the reliability of the scroll compressor 100.

[0121] An advance vent 112 is provided on the stationary plate 116, and an advance vent valve 130 is provided between the back pressure plate 120 and the stationary plate 116. The back pressure plate 120 is provided with a limiting surface 121 on the side facing the stationary plate 116. That is to say, the advance vent valve 130 is sandwiched between the advance vent 112 and the limiting surface 121 of the stationary plate 116, so as to limit the opening angle of the advance vent valve 130 when venting in advance, avoid excessive bending of the advance vent valve 130, and extend the service life of the advance vent valve 130.

[0122] A scroll compressor 100 is a mechanical device used to compress gas. It is usually composed of a stationary scroll assembly (stationary scroll 116) and a moving scroll component (moving scroll 115). The relative revolution of the scroll teeth forms a continuous change in the closed volume, and the volume of the compression chamber 111 becomes smaller and smaller, thereby compressing the gas and increasing the pressure and temperature of the gas.

[0123] In related technologies, scroll compressors typically have a recessed area formed on the end face of the stationary scroll assembly, and a sealing assembly (float assembly) is disposed in the recessed area. One side of the recessed area communicates with one of the compression chambers formed between the stationary scroll assembly and the moving scroll component, while the other side cooperates with the sealing assembly (float assembly) to form a back pressure chamber that provides back pressure to the stationary scroll assembly. Typically, the back pressure plate is designed in a disc shape, with a cavity (exhaust chamber) in the middle area that forms an exhaust channel with the end face of the stationary scroll. The front side is subjected to gas back pressure, achieving axial sealing between the stationary and moving scrolls.

[0124] This utility model integrates the pressure relief valve plate baffle (limiting surface 121) with the back pressure plate 120. Furthermore, it integrates the pressure relief valve plate (pressure relief valve 132), the bypass valve plate (bypass valve 131), and the back pressure plate gasket (sealing gasket 160) into a single gasket, reducing the number of parts and the cost of parts, solving the installation and positioning problem of the pressure relief valve gasket and baffle (limiter), and improving manufacturability.

[0125] Based on the position design of the pressure relief valve (early exhaust valve 130) of the static scroll plate (static plate 116), the back pressure plate 120 end face is machined and modified inward to replace the pressure relief valve baffle (limiter). In addition, a bypass valve plate (bypass valve 131) and a pressure relief and exhaust valve plate (pressure relief valve 132) are machined in the same position on the gasket (sealing gasket 160) and integrated into a single gasket.

[0126] Specifically, an integrated back pressure plate structure for a variable displacement scroll compressor (scroll compressor 100) includes a back pressure plate assembly, a back pressure plate gasket (sealing gasket 160), and fasteners. The back pressure plate assembly includes a back pressure plate component (back pressure plate 120) and a circular sealing ring located in an outer groove, which is fixed to the concave end face of the stationary scroll (stationary disk 116). The back pressure plate gasket (sealing gasket 160) is fixed to the side of the back pressure plate 120 near the stationary scroll (stationary disk 116). The fasteners fix the back pressure plate 120 and the back pressure plate gasket (sealing gasket 160) to the end face of the stationary scroll (stationary disk 116).

[0127] One side of the stationary volute (stationary disk 116) is provided with stationary volute teeth, a pressure relief hole 114, an exhaust hole (exhaust port), and a bypass hole 113. A back pressure plate 120 is installed on the other side of the stationary volute teeth. The back pressure plate 120 and the stationary volute (stationary disk 116) define a space for the pressure relief valve plate (pressure relief valve 132) to open or block the pressure relief hole 114. The back pressure plate 120 and the stationary volute (stationary disk 116) are respectively provided with connection holes for positioning fasteners to pass through. The back pressure plate 120 and the back pressure plate gasket (sealing gasket 160) are fixed to the stationary volute (stationary disk 116) by positioning fasteners.

[0128] A bypass cavity 140 is formed between the back side of the stationary scroll plate (stationary plate 116) and the back pressure plate 120. A bypass hole 113 is present on the back side of the stationary scroll plate (stationary plate 116) and is connected to the bypass cavity 140. A variable-capacity check valve (bypass valve 131) installed on the back side of the stationary plate 116 is located inside the bypass cavity 140. These devices enable the variable volume function of the scroll compressor 100. When the scroll compressor 100 is under full load (non-bypass operation), the pressure in the bypass cavity 140 is the intermediate pressure. When the scroll compressor 100 is under half load (bypass operation), the pressure in the bypass cavity 140 is the suction pressure. A control valve (a valve structure that controls whether the bypass cavity 140 is connected to the suction cavity 210) and an exhaust valve (bypass valve 131) can selectively introduce high-pressure fluid or low-pressure fluid into the bypass cavity 140.

[0129] The limiting surface 121 is inclined to the side opposite to the concave end face of the stationary scroll (stationary plate 116) to form a movable space for the pressure relief valve plate (pressure relief valve 132) to move, and / or the limiting surface 121 is inclined to the side opposite to the concave end face of the stationary scroll (stationary plate 116) to form a movable space for the pre-bypass valve plate (bypass valve 131) to move. Based on the position design of the pressure relief valve (pre-exhaust valve 130) of the stationary scroll (stationary plate 116), a pressure relief valve plate (pressure relief valve 132) and a bypass valve plate (bypass valve 131) are provided. There are two limiting surfaces 121. The pressure relief valve plate (pressure relief valve 132) is located in the movable space formed by one of the limiting surfaces 121, sealing the pressure relief hole 114. The bypass valve plate (bypass valve 131) is located in the movable space formed by the other limiting surface 121, sealing the bypass hole 113.

[0130] The technical solution of this utility model integrates both the limiter (limiting surface 121) and the pressure relief valve (early exhaust valve 130) onto the back pressure plate (back pressure plate 120 and sealing gasket 160). Thus, the pressure relief valve (early exhaust valve 130) is positioned on the side of the limiter (limiting surface 121) away from the back pressure plate 120, meaning it is outside the limiter (limiting surface 121) and not obstructed. When fixing the pressure relief valve (early exhaust valve 130) to the limiter (limiting surface 121), it can be easily installed and positioned, ensuring accurate installation on the limiter (limiting surface 121) without misalignment. This guarantees the assembly accuracy and sealing reliability of the pressure relief valve (early exhaust valve 130), while also improving assembly efficiency and reducing production costs.

[0131] That is, by machining and modifying the back pressure plate 120 and the gasket (sealing gasket 160), the original design of the pressure relief gasket and exhaust valve assembly is eliminated. The aim is to make it easier to install and position the pressure relief valve plate (pressure relief valve 132) and the bypass valve plate (bypass valve 131), so as to ensure the assembly accuracy and sealing reliability of the pressure relief valve 132 and the bypass valve 131.

[0132] According to a second aspect of the present invention, a refrigeration device is provided, including a scroll compressor 100 as provided in any of the above embodiments, and thus possessing all the beneficial technical effects of the scroll compressor 100, which will not be repeated here.

[0133] Alternatively, the refrigeration equipment may include air conditioners, refrigerators, or freezers.

[0134] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0135] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0136] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A scroll compressor, characterized in that, include: A compression structure, the compression structure including a compression chamber and a pre-venting port, the pre-venting port being able to communicate with the compression chamber; A back pressure plate is provided on the compression structure, and a limiting surface is provided on the side of the back pressure plate facing the compression cavity; An advance venting valve is located between the back pressure plate and the compression structure, and at the end of the advance venting port away from the compression chamber. The advance venting valve can open or close the advance venting port. Wherein, along the axial direction of the back pressure plate, at least a portion of the limiting surface is disposed opposite to the pre-venting valve.

2. The scroll compressor according to claim 1, characterized in that, At least a portion of the limiting surface extends obliquely toward the side opposite to the pre-venting valve.

3. The scroll compressor according to claim 2, characterized in that, The limiting surface includes: The first limiting segment, at least a portion of which is constructed as a plane; The second limiting segment is connected to the first limiting segment, and the end of the second limiting segment away from the first limiting segment extends obliquely toward the side opposite to the pre-exhaust valve.

4. The scroll compressor according to claim 3, characterized in that, The pre-venting valve includes: Connecting part; The valve body is connected to the connecting part, the valve body is opposite to the pre-venting port, along the axial direction of the back pressure plate, at least a portion of the connecting part is opposite to the first limiting section, and at least a portion of the valve body is opposite to the second limiting section.

5. The scroll compressor according to any one of claims 1 to 4, characterized in that, The back pressure plate includes: plate body; The mounting part is located on the side of the plate facing the compression chamber. The mounting part divides the space between the plate and the compression structure into an exhaust chamber and a bypass chamber. Along the radial direction of the back pressure plate, the bypass chamber is located outside the exhaust chamber. The exhaust chamber communicates with the compression chamber. The limiting surface is located within at least one of the exhaust chamber and the bypass chamber.

6. The scroll compressor according to claim 5, characterized in that, The limiting surface includes a first limiting surface, which is located within the bypass cavity; The pre-venting port includes a bypass port, and the pre-venting valve includes a bypass valve. The bypass valve can open or close the bypass port to make the bypass port communicate with or cut off the bypass cavity. Along the axial direction of the back pressure plate, the first limiting surface is disposed opposite to the bypass valve.

7. The scroll compressor according to claim 6, characterized in that, The mounting portion includes a first outer edge surface, which extends axially along the back pressure plate, and the outer diameter of the first outer edge surface is smaller than the outer diameter of the plate body. The first outer edge surface forms part of the cavity wall of the bypass cavity, and the first limiting surface is connected to the first outer edge surface.

8. The scroll compressor according to claim 7, characterized in that, The mounting portion further includes a second outer edge surface, which extends axially along the back pressure plate, and the outer diameter of the second outer edge surface is equal to the outer diameter of the plate body; Along the circumference of the back pressure plate, the first outer edge surface includes a first outer edge portion and a second outer edge portion connected together. The first outer edge portion is closer to the second outer edge surface than the second outer edge portion, and the first limiting surface is connected to the first outer edge portion.

9. The scroll compressor according to claim 8, characterized in that, The mounting portion further includes a first flow-through surface, which is connected to the second outer edge surface and extends along the axial direction of the back pressure plate. The back pressure plate further includes: The second flow surface is connected to the first limiting surface and extends along the axial direction of the back pressure plate. Along the circumference of the back pressure plate, the first flow surface is located between the second outer edge surface and the second flow surface. The second flow surface is connected to the first flow surface, and the connection is tangent.

10. The scroll compressor according to claim 5, characterized in that, The limiting surface includes a second limiting surface, which is located inside the exhaust chamber; The pre-venting port includes a pressure relief port, and the pre-venting valve includes a pressure relief valve. The pressure relief valve can open or close the pressure relief port so that the pressure relief port communicates with or is cut off from the venting chamber. Along the axial direction of the back pressure plate, the second limiting surface is disposed opposite to the pressure relief valve.

11. The scroll compressor according to claim 10, characterized in that, The back pressure plate also includes an exhaust channel, which is connected to the exhaust chamber. Along the axial direction of the back pressure plate, at least a portion of the second limiting surface is offset from the exhaust channel.

12. The scroll compressor according to claim 5, characterized in that, Also includes: A sealing gasket is disposed between the mounting portion and the compression structure, and arranged around the exhaust chamber; The sealing gasket is connected to the pre-venting valve.

13. The scroll compressor according to claim 12, characterized in that, The sealing gasket and the pre-venting valve are an integral structure.

14. The scroll compressor according to claim 12, characterized in that, The mounting part is also provided with a sealing surface on the side facing the compression chamber, and the sealing gasket is disposed between the sealing surface and the compression structure; Wherein, along the axial direction of the back pressure plate, the limiting surface does not extend beyond the sealing surface.

15. The scroll compressor according to any one of claims 1 to 4, characterized in that, The compression structure includes: Moving plate; A stationary disc forms the compression chamber with the moving disc. A back pressure plate is located on the side of the stationary disc away from the moving disc. The stationary disc is provided with the pre-venting hole. The pre-venting valve is located between the back pressure plate and the stationary disc. The back pressure plate is provided with the limiting surface on the side facing the stationary disc.

16. A refrigeration device, characterized in that, Including the scroll compressor as described in any one of claims 1 to 15.

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