Compression mechanism, compressor and refrigeration equipment

Abstract

The utility model provides a compression mechanism, a compressor and refrigeration equipment. The compression mechanism comprises a movable disc and a movable disc, the static disc assembly and the movable disc form a compression cavity, and the static disc assembly comprises a bypass cavity; the bypass structure is arranged on the static disc assembly or the movable disc, and the compression cavity can communicate with the bypass cavity through the bypass structure; wherein the bypass structure comprises a first bypass hole, at least one part of the first bypass hole extends in the circumferential direction of the compression mechanism, and / or the bypass structure comprises a plurality of second bypass holes, and the multiple second bypass holes are distributed in the circumferential direction of the compression mechanism, that is, the circulation sectional area of the bypass structure is increased by increasing the circumferential size of the bypass structure; therefore, when the compressor operates under the bypass working condition, the fluid resistance can be reduced, the power loss is reduced, and the overall efficiency of the compressor under the bypass working condition is improved.

Description

Technical Field

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

[0002] Currently, variable displacement scroll compressors include a compression mechanism composed of a fixed scroll component and a moving scroll component. The moving scroll component includes a moving scroll end plate and moving scroll blades, while the fixed scroll component includes a fixed scroll end plate and fixed scroll blades. A bypass port is configured to provide fluid communication between the compression chamber and the bypass chamber. A control valve controls the fluid communication between the bypass chamber and the suction pressure zone. Specifically, when the control valve is closed, the variable displacement scroll compressor operates at full capacity, while when the control valve is open, the variable displacement scroll compressor operates at a reduced capacity, thus achieving the variable displacement function.

[0003] However, in the bypass operation mode of the variable displacement scroll compressor in the relevant technology, that is, when the control valve is open, the fluid resistance is large, which leads to a large power loss of the scroll compressor and affects the overall efficiency of the machine. Utility Model Content

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

[0005] Therefore, a first aspect of the embodiments of this utility model provides a compression mechanism.

[0006] A second aspect of the embodiments of this utility model provides a compressor.

[0007] A third aspect of the embodiments of this utility model provides a refrigeration device.

[0008] In view of the above, according to a first aspect of the present invention, a compression mechanism is provided, comprising: a moving disk; a stationary disk assembly forming a compression cavity with the moving disk, the stationary disk assembly including a bypass cavity; and a bypass structure disposed on the stationary disk assembly or the moving disk, wherein the compression cavity can communicate with the bypass cavity through the bypass structure; wherein the bypass structure includes a first bypass hole, at least a portion of the first bypass hole extending circumferentially along the compression mechanism, and / or the bypass structure includes a plurality of second bypass holes arranged circumferentially along the compression mechanism.

[0009] The compression mechanism provided in this embodiment includes a moving disc, a stationary disc assembly, and a bypass structure. Specifically, the stationary disc assembly and the moving disc form a compression chamber, and the compression chamber is connected to the suction chamber of the compressor. Specifically, during the operation of the compressor, gas enters the compression chamber from the suction chamber. Since the moving disc can move relative to the stationary disc assembly, the gas entering the compression chamber can be compressed during the movement of the moving disc. When the pressure of the compressed gas increases to the exhaust pressure, the high-temperature and high-pressure compressed gas is discharged from the exhaust port on the stationary disc assembly.

[0010] Compressors generally operate in bypass and non-bypass modes. Specifically, in bypass mode, the compression chamber is connected to the bypass chamber via a bypass structure, and the bypass chamber is connected to the suction chamber, thus allowing some gas to be discharged prematurely, reducing displacement, cooling capacity, and energy consumption. In non-bypass mode, the bypass structure is closed, meaning the compression chamber is disconnected from the bypass chamber, and the bypass chamber is disconnected from the suction chamber. As the volume of gas in the compression chamber continuously decreases, normal compression begins, thus achieving the compressor's variable capacity function.

[0011] The bypass structure includes a first bypass hole, at least a portion of which extends circumferentially along the compression mechanism, and / or the bypass structure includes a plurality of second bypass holes arranged circumferentially along the compression mechanism. That is, by increasing the circumferential dimension of the bypass structure, the flow cross-sectional area of ​​the bypass structure is increased, thereby reducing fluid resistance, reducing power loss, and improving the overall efficiency of the compressor under bypass conditions when the compressor is running in bypass mode.

[0012] Moreover, compared to increasing the flow cross-sectional area of ​​the bypass structure by increasing its radial dimension, this method avoids the situation where the radial dimension of the bypass structure is too large and crosses the cavity, thereby avoiding problems such as gas leakage in the medium and low pressure cavities, repeated gas compression, increased exhaust temperature, and increased ineffective compression work caused by the bypass structure crossing the cavity.

[0013] Furthermore, it is understood that when the bypass structure includes a first bypass hole, since at least part of the first bypass hole extends circumferentially, i.e. the first bypass hole is formed as an elongated hole, the elongated first bypass hole has a larger flow cross-sectional area compared to setting the bypass structure as multiple spaced second bypass holes, and the bypass rate of the compressor is higher when it is running under bypass conditions.

[0014] In some technical solutions, optionally, the bypass structure includes a first bypass hole along the radial direction of the compression mechanism, the hole wall of the first bypass hole includes opposing first and second surfaces, at least one of the first and second surfaces being configured as a plane.

[0015] In this technical solution, since at least one of the first and second surfaces is a plane, i.e. the first bypass hole is an oblong hole, by setting the bypass structure as an oblong hole, the flow cross-sectional area of ​​the bypass structure can be increased, thereby reducing fluid resistance and power loss when the compressor is running in bypass condition, and thus improving the overall efficiency of the compressor in bypass condition.

[0016] In some technical solutions, optionally, the bypass structure includes a first bypass hole along the radial direction of the compression mechanism, the first bypass hole including opposing third and fourth surfaces, at least one of the third and fourth surfaces being configured as an arcuate surface.

[0017] In this technical solution, since at least one of the third and fourth surfaces is an arc-shaped surface, that is, the first bypass hole is an elliptical hole or a crescent-shaped hole, by setting the bypass structure as an elliptical hole or a crescent-shaped hole, the flow cross-sectional area of ​​the bypass structure can be increased, thereby reducing fluid resistance and power loss when the compressor is running in bypass mode, and thus improving the overall efficiency of the compressor in bypass mode.

[0018] Furthermore, by setting at least one of the third and fourth surfaces as an arc-shaped surface, the flow cross-sectional area of ​​the bypass structure can be increased as much as possible, thereby reducing the fluid resistance of the compressor under bypass conditions. At the same time, the shape of the bypass structure can be matched with the profile structure of the moving volute. When the moving volute covers the bypass structure, complete sealing can be achieved, thereby achieving a safe seal.

[0019] In some technical solutions, the third and fourth surfaces may optionally be recessed on the same side; or the third and fourth surfaces may be recessed on different sides.

[0020] In some technical solutions, the moving disk may optionally include a moving volute. When the bypass structure is located on the stationary disk assembly, the moving volute can cover or open the bypass structure so that the bypass structure is cut off or connected to the compression chamber. In this case, the width of the bypass structure is smaller than the thickness of the moving volute along the radial direction of the compression mechanism.

[0021] In this technical solution, the radial width of the bypass structure is smaller than the thickness of the moving volute, which allows the moving volute to effectively cover the bypass structure, achieving a safe seal and preventing gas in the compression chamber from continuing to leak into the bypass chamber, thus improving the reliability of the compressor.

[0022] In some technical solutions, optionally, along the radial direction of the compression mechanism, the width d of the bypass structure and the thickness T of the moving worm gear satisfy the condition 0.5≤d / T≤0.8.

[0023] In this technical solution, the moving vortex tooth can completely seal the bypass structure, avoiding problems such as gas leakage from the compression chamber into the bypass chamber, gas churn in the medium and low pressure chamber, repeated gas compression, increased exhaust temperature, and increased ineffective compression work.

[0024] In some technical solutions, optionally, there are two bypass structures, which are symmetrically arranged about the central axis of the moving plate.

[0025] This technical solution can avoid uneven wear caused by uneven compression, extend the service life of the compressor, and ensure the reliable operation of the compressor.

[0026] In some technical solutions, optionally, the stationary disc assembly includes a stationary disc, a back pressure plate, and a valve assembly, wherein the stationary disc and the moving disc form a compression chamber, a bypass structure is disposed on the stationary disc, the back pressure plate is disposed on the side of the stationary disc away from the moving disc, and together with the stationary disc, forms a bypass chamber, and the valve assembly is disposed on the stationary disc for connecting or disconnecting the bypass structure from the bypass chamber.

[0027] In this technical solution, by setting a valve assembly, the bypass structure and bypass chamber are cut off when bypass is not required, which can reduce the clearance volume of the compressor under non-bypass conditions and improve the overall efficiency of the compressor.

[0028] In some technical solutions, the stationary disk assembly may optionally include a float assembly, which is disposed on the back pressure plate. The float assembly, the back pressure plate, and the stationary disk together form a back pressure cavity, which can communicate with the compression cavity.

[0029] In this technical solution, since the back pressure chamber can be connected to the compression chamber, intermediate pressure can be introduced into the back pressure chamber during compressor operation. This intermediate pressure can apply axial force to the stationary plate in the axial direction to ensure reliable meshing between the stationary plate and the moving plate, prevent radial leakage between the stationary plate and the moving plate, and improve the reliability of the compressor.

[0030] In some technical solutions, the stationary disc assembly may optionally include a bypass channel, one end of which is connected to a bypass chamber, and the compression mechanism may also include a control valve, which is located at the other end of the bypass channel and is used to connect or disconnect the bypass channel from the compressor's suction chamber.

[0031] In this technical solution, under bypass conditions, the compression chamber is connected to the bypass chamber through a bypass structure, and the control valve is opened so that the bypass chamber is connected to the intake chamber through the bypass channel, thereby discharging some gas in advance and achieving the purpose of reducing displacement, cooling capacity and energy consumption.

[0032] In non-bypass operation, the bypass structure is closed, meaning the compression chamber and bypass chamber are cut off, the control valve is closed, and the bypass channel is cut off from the intake chamber. As the volume of gas in the compression chamber continuously decreases, normal compression begins, thus realizing the variable capacity function of the compressor.

[0033] According to a second aspect of the present invention, a compressor is provided, comprising a compression mechanism as provided in any of the above technical solutions, and thus possessing all the beneficial technical effects of the compression mechanism, which will not be repeated here.

[0034] According to a third aspect of this utility model, a refrigeration device is provided, including a compression mechanism or compressor as provided in any of the above technical solutions, and thus possesses all the beneficial technical effects of the compression mechanism or compressor, which will not be repeated here.

[0035] 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

[0036] 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:

[0037] Figure 1 A partial structural schematic diagram of a compression mechanism according to an embodiment of the present invention is shown;

[0038] Figure 2 A schematic diagram of the structure of a static disk according to an embodiment of the present invention is shown;

[0039] Figure 3 A schematic diagram of a bypass structure according to an embodiment of the present invention is shown;

[0040] Figure 4 A schematic diagram of a bypass structure according to another embodiment of the present invention is shown;

[0041] Figure 5 A schematic diagram of the structure of a compressor according to an embodiment of the present invention is shown.

[0042] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0043] 100 Compression mechanism, 110 Moving disc, 111 Moving worm gear, 120 Stationary disc assembly, 121 Bypass chamber, 122 Stationary disc, 123 Back pressure plate, 124 Valve assembly, 125 Float assembly, 126 Bypass channel, 130 Bypass structure, 131 First bypass hole, 132 Second bypass hole, 133 First surface, 134 Second surface, 135 Third surface, 136 Fourth surface, 140 Back pressure chamber, 150 Control valve, 160 Compression chamber, 200 Compressor, 210 Intake chamber. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] The following reference Figures 1 to 5 This invention describes a compression mechanism 100, a compressor 200, and a refrigeration device provided according to some embodiments of the present invention.

[0047] In one embodiment according to this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a compression mechanism 100 is proposed, comprising: a moving disk 110; a stationary disk assembly 120 forming a compression cavity 160 with the moving disk 110, the stationary disk assembly 120 including a bypass cavity 121; and a bypass structure 130 disposed on the stationary disk assembly 120 or the moving disk 110, wherein the compression cavity 160 can communicate with the bypass cavity 121 through the bypass structure 130; wherein the bypass structure 130 includes a first bypass hole 131, at least a portion of the first bypass hole 131 extending circumferentially along the compression mechanism 100, and / or the bypass structure 130 includes a plurality of second bypass holes 132 arranged circumferentially along the compression mechanism 100.

[0048] The compression mechanism 100 provided in this embodiment of the present invention includes a moving disk 110, a stationary disk assembly 120, and a bypass structure 130. Specifically, the stationary disk assembly 120 and the moving disk 110 form a compression chamber 160, and the compression chamber 160 is connected to the suction chamber 210 of the compressor 200. Specifically, during the operation of the compressor 200, gas enters the compression chamber 160 from the suction chamber 210. Since the moving disk 110 can move relative to the stationary disk assembly 120, the gas entering the compression chamber 160 can be compressed during the movement of the moving disk 110. When the pressure of the compressed gas increases to the exhaust pressure, the compressed high-temperature and high-pressure gas is discharged from the exhaust port on the stationary disk assembly 120.

[0049] The compressor 200 generally includes bypass and non-bypass operating modes. Specifically, in the bypass operating mode, the compression chamber 160 is connected to the bypass chamber 121 through the bypass structure 130, and the bypass chamber 121 is connected to the suction chamber 210, thereby prematurely discharging some gas and reducing displacement, cooling capacity, and energy consumption. In the non-bypass operating mode, the bypass structure 130 is closed, meaning the compression chamber 160 is disconnected from the bypass chamber 121, and the bypass chamber 121 is disconnected from the suction chamber 210. As the volume of gas in the compression chamber 160 continuously decreases, normal compression begins, thus realizing the variable capacity function of the compressor 200.

[0050] The bypass structure 130 includes a first bypass hole 131, at least a portion of which extends circumferentially along the compression mechanism 100, and / or the bypass structure 130 includes a plurality of second bypass holes 132 arranged circumferentially along the compression mechanism 100. That is, by increasing the circumferential dimension of the bypass structure 130, the flow cross-sectional area of ​​the bypass structure 130 is increased, thereby reducing fluid resistance, reducing power loss, and improving the overall efficiency of the compressor 200 under bypass conditions when the compressor 200 is running in bypass conditions.

[0051] Moreover, compared to increasing the flow cross-sectional area of ​​the bypass structure 130 by increasing its radial dimension, this avoids the situation where the radial dimension of the bypass structure 130 is too large and crosses the cavity, thereby avoiding problems such as gas leakage in the medium and low pressure cavities, repeated gas compression, increased exhaust temperature, and increased ineffective compression work caused by the bypass structure 130 crossing the cavity.

[0052] Furthermore, it is understood that when the bypass structure 130 includes a first bypass hole 131, since at least a portion of the first bypass hole 131 extends circumferentially, i.e., the first bypass hole 131 is formed as an elongated hole, compared to setting the bypass structure 130 as a plurality of spaced second bypass holes 132, the elongated first bypass hole 131 has a larger flow cross-sectional area, and the bypass rate of the compressor 200 is higher when operating under bypass conditions.

[0053] like Figure 2 As shown, in some embodiments, optionally, the bypass structure 130 includes a first bypass hole 131 along the radial direction of the compression mechanism 100, the hole wall of the first bypass hole 131 including opposing first surfaces 133 and second surfaces 134, at least one of the first surfaces 133 and the second surfaces 134 being configured as a plane.

[0054] In this embodiment, the bypass structure 130 is defined to include a first bypass hole 131. Specifically, the hole wall of the first bypass hole 131 includes a first surface 133 and a second surface 134 that are radially opposite to each other along the compression mechanism 100. Optionally, the first surface 133 is closer to the central axis of the moving disk 110 than the second surface 134, that is, the first surface 133 is the inner wall surface and the second surface 134 is the outer wall surface. Alternatively, the first surface 133 is farther away from the central axis of the moving disk 110 than the second surface 134, that is, the first surface 133 is the outer wall surface and the second surface 134 is the inner wall surface.

[0055] Since at least one of the first surface 133 and the second surface 134 is a plane, that is, the first bypass hole 131 is an oblong hole, by setting the bypass structure 130 as an oblong hole, the flow cross-sectional area of ​​the bypass structure 130 can be increased, thereby reducing fluid resistance and power loss when the compressor 200 is running in bypass condition, and thus improving the overall efficiency of the compressor 200 in bypass condition.

[0056] like Figure 3 As shown, in some embodiments, optionally, the bypass structure 130 includes a first bypass hole 131 along the radial direction of the compression mechanism 100, the first bypass hole 131 including opposing third surfaces 135 and fourth surfaces 136, at least one of the third surfaces 135 and fourth surfaces 136 being configured as an arcuate surface.

[0057] In this embodiment, the bypass structure 130 is defined to include a first bypass hole 131. Specifically, the hole wall of the first bypass hole 131 includes a third surface 135 and a fourth surface 136 that are radially opposite to each other along the compression mechanism 100. Optionally, the third surface 135 is closer to the central axis of the moving disk 110 than the fourth surface 136, that is, the third surface 135 is the inner wall surface and the fourth surface 136 is the outer wall surface. Alternatively, the third surface 135 is farther away from the central axis of the moving disk 110 than the fourth surface 136, that is, the third surface 135 is the outer wall surface and the fourth surface 136 is the inner wall surface.

[0058] Since at least one of the third surface 135 and the fourth surface 136 is an arc-shaped surface, that is, the first bypass hole 131 is an elliptical hole or a crescent hole, by setting the bypass structure 130 as an elliptical hole or a crescent hole, the flow cross-sectional area of ​​the bypass structure 130 can be increased, thereby reducing fluid resistance and power loss when the compressor 200 is running in bypass condition, and thus improving the overall efficiency of the compressor 200 in bypass condition.

[0059] Furthermore, by setting at least one of the third surface 135 and the fourth surface 136 as an arc-shaped surface, the flow cross-sectional area of ​​the bypass structure 130 can be increased as much as possible, thereby reducing the fluid resistance of the compressor 200 under bypass conditions. At the same time, the shape of the bypass structure 130 can be matched with the profile structure of the moving volute 111. When the moving volute 111 covers the bypass structure 130, complete sealing can be achieved, thereby achieving a safe seal.

[0060] In some embodiments, the third surface 135 and the fourth surface 136 are optionally recessed to the same side; or the third surface 135 and the fourth surface 136 are recessed to different sides.

[0061] In this embodiment, since the third surface 135 and the fourth surface 136 are recessed to the same side, optionally, both the third surface 135 and the fourth surface 136 are recessed to the side away from the central axis of the moving disk 110, that is, the first bypass hole 131 is a crescent hole.

[0062] Since the third surface 135 and the fourth surface 136 are recessed to different sides, optionally, when the third surface 135 is the inner wall surface, the third surface 135 is recessed to the side closer to the central axis of the moving disk 110, and the fourth surface 136 is recessed to the side away from the central axis of the moving disk 110, that is, the first bypass hole 131 is an elliptical hole.

[0063] like Figure 2 and Figure 5 As shown, in some embodiments, optionally, the moving disk 110 includes a moving volute 111. When the bypass structure 130 is provided on the stationary disk assembly 120, the moving volute 111 can cover or open the bypass structure 130 so that the bypass structure 130 is cut off or connected to the compression chamber 160; wherein, along the radial direction of the compression mechanism 100, the width of the bypass structure 130 is smaller than the thickness of the moving volute 111.

[0064] In this embodiment, the moving disk 110 is defined to include a moving volute 111. Specifically, since the bypass structure 130 is disposed on the stationary disk assembly 120, during the movement of the moving disk 110 relative to the stationary disk assembly 120, the moving volute 111 can cover the bypass structure 130 to cut off the bypass structure 130 from the compression chamber 160, and the moving disk 110 continues to move. When the moving volute 111 is misaligned with at least part of the bypass structure 130, the bypass structure 130 opens and communicates with the compression chamber 160.

[0065] The radial width of the bypass structure 130 is smaller than the thickness of the moving volute 111, so that the moving volute 111 can effectively cover the bypass structure 130, achieve a safe seal, and prevent the gas in the compression chamber 160 from continuing to leak into the bypass chamber 121, which is beneficial to improving the reliability of the compressor 200.

[0066] like Figure 2 and Figure 5 As shown, in some embodiments, optionally, along the radial direction of the compression mechanism 100, the width d of the bypass structure 130 and the thickness T of the moving worm gear 111 satisfy 0.5≤d / T≤0.8.

[0067] In this embodiment, the relationship between the radial dimension of the bypass structure 130 and the thickness of the moving volute 111 is further defined. Specifically, d / T is between 0.5 and 0.8, so that the moving volute 111 can completely seal the bypass structure 130, avoiding the problems of gas leakage from the compression chamber 160 to the bypass chamber 121, which would lead to gas leakage in the medium and low pressure chambers, repeated gas compression, increased exhaust temperature, and increased ineffective compression work.

[0068] Optionally, d / T can be any one of 0.5, 0.6, 0.7, or 0.8.

[0069] like Figure 2 As shown, in some embodiments, optionally, the number of bypass structures 130 is two, and the two bypass structures 130 are symmetrically arranged about the central axis of the moving disk 110.

[0070] In this embodiment, the number of bypass structures 130 is limited to two. Specifically, the two bypass structures 130 are symmetrically arranged about the central axis of the moving plate 110, which can avoid uneven wear caused by uneven compression, extend the service life of the compressor 200, and ensure the reliable operation of the compressor 200.

[0071] like Figure 1 As shown, in some embodiments, optionally, the stationary disc assembly 120 includes a stationary disc 122, a back pressure plate 123, and a valve assembly 124, wherein the stationary disc 122 and the moving disc 110 form a compression chamber 160, a bypass structure 130 is disposed on the stationary disc 122, the back pressure plate 123 is disposed on the side of the stationary disc 122 away from the moving disc 110, and together with the stationary disc 122, forms a bypass chamber 121, and the valve assembly 124 is disposed on the stationary disc 122 for connecting or disconnecting the bypass structure 130 from the bypass chamber 121.

[0072] In this embodiment, the stationary disc assembly 120 is defined to include a stationary disc 122, a back pressure plate 123, and a valve assembly 124. Specifically, the stationary disc 122 and the moving disc 110 form a compression chamber 160, and a bypass structure 130 is disposed on the stationary disc 122.

[0073] The back pressure plate 123 is disposed on the side of the stationary plate 122 away from the moving plate 110, and the back pressure plate 123 and the stationary plate 122 enclose a bypass cavity 121. The valve assembly 124 can make the bypass structure 130 and the bypass cavity 121 connect or disconnect. Specifically, the bypass structure 130 includes a first end and a second end that are opposite to each other. The moving vortex 111 can open or close the first end so that the bypass structure 130 and the compression cavity 160 can connect or disconnect. The valve assembly 124 can open or close the second end so that the bypass structure 130 and the bypass cavity 121 can connect or disconnect.

[0074] Specifically, when the compressor 200 operates in bypass mode, the moving scroll gear 111 is misaligned with at least part of the bypass structure 130, the valve assembly 124 opens the bypass structure 130, the compression chamber 160 communicates with the bypass chamber 121 through the bypass structure 130, and the bypass chamber 121 communicates with the suction chamber 210, thus realizing the bypass function. By setting the valve assembly 124, the bypass structure 130 and the bypass chamber 121 can be shut off when bypass is not needed, which can reduce the clearance volume of the compressor 200 under non-bypass mode and improve the overall efficiency of the compressor 200.

[0075] Optionally, valve assembly 124 includes a check valve.

[0076] Optionally, valve assembly 124 includes a valve plate and a limiter, with the valve plate located between bypass structure 130 and the limiter.

[0077] like Figure 1 As shown, in some embodiments, optionally, the stationary disk assembly 120 further includes a float assembly 125, which is disposed on the back pressure plate 123. The float assembly 125, the back pressure plate 123, and the stationary disk 122 enclose a back pressure cavity 140, which can communicate with the compression cavity 160.

[0078] In this embodiment, the stationary disk assembly 120 is further defined as including a float assembly 125. Specifically, the float assembly 125 is disposed on the back pressure plate 123, and the float assembly 125, the back pressure plate 123 and the stationary disk 122 enclose a back pressure cavity 140.

[0079] Since the back pressure chamber 140 can communicate with the compression chamber 160, intermediate pressure can be introduced into the back pressure chamber 140 during the operation of the compressor 200. This intermediate pressure can apply axial force to the stationary plate 122 in the axial direction to ensure reliable meshing between the stationary plate 122 and the moving plate 110, prevent radial leakage between the stationary plate 122 and the moving plate 110, and improve the reliability of the compressor 200.

[0080] like Figure 1 and Figure 5As shown, in some embodiments, optionally, the stationary disc assembly 120 further includes a bypass channel 126, one end of which is connected to the bypass chamber 121. The compression mechanism 100 also includes a control valve 150, which is located at the other end of the bypass channel 126 and is used to connect or disconnect the bypass channel 126 from the suction chamber 210 of the compressor 200.

[0081] In this embodiment, the compression mechanism 100 further includes a control valve 150. Specifically, the stationary disc assembly 120 also includes a bypass channel 126, which is optionally disposed on the stationary disc 122. Since one end of the bypass channel 126 is connected to the bypass chamber 121, the control valve 150 can open or close the other end of the bypass channel 126 to connect or disconnect the bypass channel 126 from the intake chamber 210.

[0082] Specifically, in bypass mode, the compression chamber 160 is connected to the bypass chamber 121 via the bypass structure 130, and the control valve 150 is opened, allowing the bypass chamber 121 to connect to the suction chamber 210 via the bypass channel 126. This allows some gas to be discharged in advance, reducing displacement, cooling capacity, and energy consumption. In non-bypass mode, the bypass structure 130 is closed, meaning the compression chamber 160 and bypass chamber 121 are disconnected, and the control valve 150 is closed, disconnecting the bypass channel 126 from the suction chamber 210. As the volume of gas in the compression chamber 160 continuously decreases, normal compression begins, thus realizing the variable capacity function of the compressor 200.

[0083] Optionally, the control valve 150 includes a solenoid valve.

[0084] According to a second aspect of the present invention, a compressor 200 is provided, including a compression mechanism 100 as provided in any of the above embodiments, and thus possesses all the beneficial technical effects of the compression mechanism 100, which will not be repeated here.

[0085] Optionally, the compressor 200 includes a housing and a compression mechanism 100 disposed in the housing. The housing defines an intake pressure zone (intake chamber 210) and an exhaust pressure zone. The compression mechanism 100 includes a moving scroll component (moving disk 110) and a stationary scroll component (stationary disk 122). The moving scroll component (moving disk 110) includes a moving scroll end plate and moving scroll blades (moving scroll teeth 111) formed on the moving scroll end plate. The stationary scroll component (stationary disk 122) includes a stationary scroll end plate, stationary scroll blades formed on the stationary scroll end plate, and a bypass cavity 121 formed with the back pressure plate 123. The stationary scroll blades and the moving scroll blades engage with each other to form a series of compression cavities 160 therebetween. The bypass cavity 121 is in fluid communication with one of the series of compression cavities 160 formed between the moving scroll blades and the stationary scroll blades via a bypass hole (bypass structure 130), and is in communication with the intake chamber 210 via a return air hole (bypass channel 126). The float assembly 125 cooperates with the recess (partial stationary plate 122) to jointly form the back pressure chamber 140, and the float assembly 125 is configured to separate the back pressure chamber 140 from the high pressure side and the low pressure side of the scroll compressor (compressor 200).

[0086] The bypass port (bypass structure 130) is configured to selectively provide fluid communication between the compression chamber 160 and the bypass chamber 121. When the control valve 150 closes the bypass chamber 121, the compressor 200 operates at full capacity (non-bypass condition), while when the control valve 150 opens the bypass chamber 121, the compressor 200 operates at reduced capacity (bypass condition). Some of the gas in the compression chamber 160 enters the bypass chamber 121 through the bypass port (bypass structure 130) and then returns to the suction chamber 210 through the return port (bypass channel 126), thereby reducing the actual displacement of the compressor 200 and achieving the purpose of regulating capacity.

[0087] The control valve 150 is disposed between the bypass chamber 121 and the intake pressure zone (intake chamber 210). A bypass hole (bypass structure 130) is formed in the fixed scroll end plate of the fixed scroll component (stationary disk 122). A one-way valve (valve assembly 124) is disposed on one side of the bypass hole (bypass structure 130) located in the bypass chamber 121. The bypass hole (first bypass hole 131) is an oblong hole. The width of the bypass hole (bypass structure 130) is less than the wall thickness of the scroll blade (moving scroll tooth 111).

[0088] According to a third aspect of the present invention, a refrigeration device is provided, including a compression mechanism 100 or a compressor 200 as provided in any of the above embodiments, and thus possesses all the beneficial technical effects of the compression mechanism 100 or the compressor 200, which will not be repeated here.

[0089] Alternatively, the refrigeration equipment may include air conditioners, refrigerators, or freezers.

[0090] 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.

[0091] 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.

[0092] 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 compression mechanism, characterized in that, include: Moving plate; A stationary disk assembly forms a compression chamber with the moving disk, and the stationary disk assembly includes a bypass chamber; A bypass structure is provided on the stationary disk assembly or the moving disk, and the compression chamber can be connected to the bypass chamber through the bypass structure; The bypass structure includes a first bypass hole, at least a portion of which extends circumferentially along the compression mechanism, and / or the bypass structure includes a plurality of second bypass holes, which are arranged circumferentially along the compression mechanism.

2. The compression mechanism according to claim 1, characterized in that, Based on the bypass structure including the first bypass hole, along the radial direction of the compression mechanism, the hole wall of the first bypass hole includes opposing first and second surfaces, at least one of the first and second surfaces being configured as a plane.

3. The compression mechanism according to claim 1, characterized in that, Based on the bypass structure including the first bypass hole, along the radial direction of the compression mechanism, the first bypass hole includes opposing third and fourth surfaces, at least one of the third and fourth surfaces being configured as an arcuate surface.

4. The compression mechanism according to claim 3, characterized in that, The third surface and the fourth surface are recessed on the same side; or the third surface and the fourth surface are recessed on different sides.

5. The compression mechanism according to any one of claims 1 to 4, characterized in that, The moving disk includes a moving volute. When the bypass structure is provided on the stationary disk assembly, the moving volute can cover or open the bypass structure so that the bypass structure is cut off or connected to the compression chamber. Wherein, along the radial direction of the compression mechanism, the width of the bypass structure is smaller than the thickness of the moving worm gear.

6. The compression mechanism according to claim 5, characterized in that, Along the radial direction of the compression mechanism, the width d of the bypass structure and the thickness T of the moving worm gear satisfy the condition 0.5≤d / T≤0.

8.

7. The compression mechanism according to any one of claims 1 to 4, characterized in that, The number of bypass structures is two, and the two bypass structures are symmetrically arranged about the central axis of the moving disk.

8. The compression mechanism according to any one of claims 1 to 4, characterized in that, The static disk assembly includes: A stationary disc, together with the moving disc, forms the compression cavity, and the bypass structure is provided on the stationary disc; A back pressure plate is disposed on the side of the stationary plate away from the moving plate, and together with the stationary plate, forms the bypass cavity; A valve assembly, located on the stationary plate, is used to connect or disconnect the bypass structure from the bypass cavity.

9. The compression mechanism according to claim 8, characterized in that, The static disk assembly also includes: A float assembly is disposed on the back pressure plate. The float assembly, the back pressure plate, and the stationary plate enclose a back pressure cavity, which can communicate with the compression cavity.

10. The compression mechanism according to any one of claims 1 to 4, characterized in that, The stationary disk assembly further includes a bypass channel, one end of which communicates with the bypass cavity; the compression mechanism further includes: A control valve is located at the other end of the bypass channel and is used to connect or disconnect the bypass channel from the compressor's suction chamber.

11. A compressor, characterized in that, Includes the compression mechanism as described in any one of claims 1 to 10.

12. A refrigeration device, characterized in that, include: The compression mechanism as described in any one of claims 1 to 10; or The compressor as described in claim 11.

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