Self-adaptive back pressure adjusting dynamic disc and compressor

Abstract

The application provides a self-adaptive back pressure adjusting dynamic disc and a compressor, and relates to the technical field of compressors.A pressure regulating assembly including a valve core and an elastic member is arranged in the base body of the dynamic disc.The pressure regulating assembly can automatically switch the on-off of the pressure compensation channel according to the real-time change of the difference between the exhaust pressure and the suction pressure, so as to realize the automatic and dynamic adjustment of the back pressure ratio.When the compressor is in a cold working condition, the valve core moves to the first state position, so as to be able to conduct the pressure compensation channel between the first back pressure hole and the assembly hole of the core part or the hub part of the scroll tooth, thus the additional high-pressure medium can be introduced to dynamically increase the back pressure, and the dynamic disc and the fixed disc can still be closely fitted under the high pressure ratio;when the compressor is in a normal working condition, the valve core is reset to the second state position under the action of the elastic member and the medium back pressure, so as to be able to cut off the pressure compensation channel, so that the back pressure returns to the normal level, and the abnormal wear of the dynamic disc and the fixed disc caused by the excessive sealing force is avoided.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to an adaptive back pressure regulating disc and compressor. Background Technology

[0002] Scroll compressors are essential equipment in heat pump air conditioning systems. In the compressor, a back pressure hole is usually set at a suitable pressure ratio position on the base of the moving plate, and the bottom surface of the moving plate away from the fixed plate is set as the back pressure zone. By introducing intermediate pressure into this back pressure zone, an upward back pressure is provided to the moving plate, so that the overall resultant force on the moving plate is upward and moderate, thereby enabling the moving plate to fit with the fixed plate to ensure sealing, while also preventing abnormal wear between the moving plate and the fixed plate.

[0003] Currently, scroll compressors commonly use a constant back pressure ratio structure, in which the back pressure P... b =P s *R (where P) s R is the compressor's suction pressure, and R is the fixed back pressure ratio, which remains constant throughout the compressor's operating range (typically set between 1.15 and 1.45). However, in cold regions, heat pump air conditioning systems require a wider operating range, with minimum evaporation temperatures as low as -40°C and maximum condensation temperatures as high as 70°C. This results in a significant increase in the pressure ratio ε in the upper left corner of the operating range, reaching 14 to 18 (ε = P). d / P s P d The back pressure is the compressor's discharge pressure. In cold regions, the compressor's suction pressure is lower, leading to a higher pressure ratio. Under this high pressure ratio condition, even if the back pressure ratio R is set to the maximum value within the normal range (e.g., 1.45), the back pressure will still decrease significantly due to the significantly reduced suction pressure. This causes the resultant force on the moving plate to be downward, which cannot support the seal between the moving plate and the fixed plate, resulting in leakage between the moving and fixed plates under the high pressure ratio condition. Consequently, the heating effect deteriorates, and the energy efficiency ratio decreases.

[0004] To address the aforementioned issues, the current solution is to directly adjust the back pressure ratio R from 1.45 to 1.80 or even higher to obtain sufficient back pressure under low-temperature conditions. However, when the heat pump air conditioning system is operating under normal conditions (its pressure ratio is usually low, ε≈3), excessive back pressure will cause the combined force borne by the moving plate to far exceed the reasonable range required for sealing, resulting in excessive sealing force between the moving plate and the fixed plate, which will cause serious abnormal wear.

[0005] Therefore, it is evident that the traditional constant back pressure ratio structure cannot simultaneously meet the requirements of ultra-low temperature heating under cold conditions and cooling under normal conditions. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide an adaptive back pressure regulating disc and compressor to solve the problem that the existing constant back pressure ratio structure cannot simultaneously meet the requirements of ultra-low temperature heating under cold conditions and cooling under normal conditions.

[0007] In accordance with the above objectives, a first aspect of the present invention provides an adaptive back pressure regulating disc, comprising a base, a vortex tooth disposed on the top surface of the base, and a hub disposed on the bottom surface of the base, wherein the bottom surface of the base is formed as a back pressure side, and wherein a pressure regulating assembly is disposed inside the base, the pressure regulating assembly comprising a valve core and an elastic element correspondingly connected to the valve core, the valve core being capable of reciprocating radially along the base under the action of a medium and the elastic element, and an air passage being formed inside the valve core; The bottom surface of the substrate has a first back pressure hole. When the valve core is in the first state position, the first end of the air passage is connected to the first back pressure hole, and the second end of the air passage is connected to the assembly hole of the core of the vortex tooth or the hub to form a pressure compensation channel. When the valve core is in the second state position, the pressure compensation channel is in an open circuit state.

[0008] Preferably, the substrate has a mounting cavity that corresponds to and is adapted to the voltage regulating component; the substrate also has a first channel, a first end of the first channel communicating with the mounting cavity, and a second end of the first channel communicating with the assembly hole of the hub. The medium in the mounting hole of the hub can flow into the mounting cavity through the first channel and can push the valve core to move radially along the base.

[0009] Preferably, the valve core is formed with a first column segment and a second column segment arranged in sequence, wherein the cross-sectional area of ​​the second column segment is smaller than the cross-sectional area of ​​the first column segment. Along the radial direction of the matrix, the elastic element is located at the first end of the first column segment, and the second column segment is located at the second end of the first column segment.

[0010] Preferably, the mounting cavity includes a large-diameter cavity and a small-diameter cavity that are sequentially connected radially along the substrate, and the small-diameter cavity is connected to the first channel; When the elastic element is in its natural state, the second column extends into the interior of the small-diameter cavity and is adapted to the small-diameter cavity; the medium in the mounting hole of the hub acts on the end face of the second column. When the thrust on the second column segment is greater than the sum of the elastic force of the elastic element and the thrust of the back pressure of the first back pressure hole acting on the valve core, the valve core can move to the first state position under the action of the thrust; when the thrust on the second column segment is less than the sum of the elastic force of the elastic element and the thrust of the back pressure of the first back pressure hole acting on the valve core, the valve core can move to the second state position under the action of the elastic force and the back pressure thrust of the first back pressure hole.

[0011] Preferably, the substrate has a second channel extending radially along the substrate; a corresponding valve body is provided at the end of the second channel near the axis of the substrate, and the mounting cavity is formed inside the valve body; the valve body has a first through hole to connect the second channel and the mounting cavity.

[0012] Preferably, the first back pressure hole is connected to the second channel through a third channel; the substrate also forms a fourth channel, the first end of the fourth channel is connected to the core of the vortex tooth, and the second end of the fourth channel is connected to the mounting cavity. When the valve core is in the first state position, the fourth channel, the air passage, the first through hole, the second channel, and the third channel are connected in sequence to form the pressure replenishment channel from the core of the vortex tooth to the first back pressure hole; when the valve core is in the second state position, the valve core blocks the second end of the fourth channel so that the pressure replenishment channel is in an open circuit state.

[0013] Preferably, the substrate has a second channel extending radially along the substrate; a corresponding valve body is provided at the end of the second channel near the axis of the substrate, and the mounting cavity is formed inside the valve body; The substrate also has a third channel, the valve body has a second through hole, and the mounting cavity is connected to the first back pressure hole through the second through hole and the third channel; When the valve core is in the first state position, the first channel, the air passage, the second through hole, and the third channel are connected in sequence to form the pressure compensation channel from the assembly hole of the hub to the first back pressure hole; when the valve core is in the second state position, the valve core blocks the second through hole so that the pressure compensation channel is in an open circuit state.

[0014] Preferably, the substrate has a second channel extending radially along the substrate; a corresponding valve body is provided at the end of the second channel near the axis of the substrate, and the mounting cavity is formed inside the valve body; the substrate also has a third channel communicating with the second channel; The valve body has a first through hole, and the mounting cavity is connected to the first back pressure hole through the first through hole, the second channel and the third channel; The valve body has a second through hole, and the third channel is also connected to the second through hole. The mounting cavity is connected to the first back pressure hole through the second through hole and the third channel.

[0015] Preferably, the valve core has a first air passage and a second air passage; The substrate also has a fourth channel, the first end of which is connected to the core of the vortex tooth, and the second end of which is connected to the mounting cavity. When the valve core is in the first state position, the fourth channel, the first air passage, the first through hole, the second channel, and the third channel are connected in sequence to form the pressure compensation channel from the core of the vortex tooth to the first back pressure hole; or, the first channel, the second air passage, the second through hole, and the third channel are connected in sequence to form the pressure compensation channel from the assembly hole of the hub to the first back pressure hole. When the valve core is in the second state position, the valve core blocks the second end of the fourth channel and the second through hole, so that the pressure replenishment channel is in an open circuit state.

[0016] According to a second aspect of the invention, a compressor is provided, wherein the compressor is provided with an adaptive back pressure regulating disc as described above.

[0017] According to the adaptive back pressure regulating moving plate and compressor of the present invention, a pressure regulating assembly including a valve core and an elastic element is provided inside the base of the moving plate. The valve core can reciprocate radially along the base, and an air passage is formed inside the valve core. Thus, the pressure regulating assembly can automatically switch the opening and closing of the pressure compensation channel according to the real-time change of the difference between the exhaust pressure and the intake pressure, so as to realize automatic and dynamic adjustment of the back pressure ratio. Specifically, when the compressor is in a cold operating condition, the high-pressure medium inside the compressor pushes the valve core to move to the first state position, thereby opening the pressure compensation channel between the first back pressure hole and the assembly hole of the core or hub of the scroll tooth. This allows additional high-pressure medium in the compressor to dynamically increase the back pressure, ensuring that the moving plate and the fixed plate can still fit tightly under the high pressure ratio. When the compressor is in a normal operating condition, the valve core is reset to the second state position under the action of the elastic element, thereby cutting off the pressure compensation channel, so that the back pressure returns to the normal level, avoiding excessive sealing force that could cause abnormal wear of the moving plate and the fixed plate.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial schematic diagram of a compressor according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the adaptive back pressure regulating disc according to a first embodiment of the present invention; Figure 3 This is a schematic diagram of the adjustment component in the first state according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of the adjustment component in the second state according to the first embodiment of the present invention; Figure 5 This is a schematic diagram of the adaptive back pressure regulating disc according to a second embodiment of the present invention; Figure 6 This is a schematic diagram of the adjustment component in the first state according to the second embodiment of the present invention; Figure 7 This is a schematic diagram of the adjustment component in the second state according to the second embodiment of the present invention; Figure 8 This is a schematic diagram of the adaptive back pressure regulating disc according to a third embodiment of the present invention; Figure 9 This is a schematic diagram of the adjustment component in the first position of the first state according to the third embodiment of the present invention; Figure 10 This is a schematic diagram of the adjustment component in the second position of the first state according to the third embodiment of the present invention; Figure 11 This is a schematic diagram of the adjustment component in the second state according to the third embodiment of the present invention.

[0021] Icons: 1-Compressor; 11-Exhaust pipe; 12-Fixed plate; 13-Moving plate; 131-Base; 132-Scroll gear; 133-Hub; 2-Valve body; 21-Mounting cavity; 221-First through hole; 222-Second through hole; 31-First channel; 32-Second channel; 33-Third channel; 34-Fourth channel; 41-First back pressure hole; 42-Second back pressure hole; 5-Pressure regulating assembly; 51-Valve core; 511-Air passage; 5111-First air passage; 5112-Second air passage; 52-Spring; Detailed Implementation The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0022] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0023] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0024] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0025] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0026] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0027] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0028] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0029] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0030] According to a first aspect of the present invention, an adaptive back pressure regulating disc is provided. The disc 13 includes a base 131, a vortex tooth 132 disposed on the top surface of the base 131, and a hub 133 disposed on the bottom surface of the base 131. The bottom surface of the base 131 is formed as the back pressure side of the disc 13 (the above structure is a conventional structure of the disc 13 and will not be described in detail). Further, a pressure regulating assembly 5 including a valve core 51 and an elastic element is also provided inside the base 131 of the disc 13. The valve core 51 can reciprocate radially along the base 131, and an air passage 511 is formed inside the valve core 51. Thus, the pressure regulating assembly 5 can automatically switch the on / off state of the pressure compensation channel according to the real-time change of the difference between the exhaust pressure and the intake pressure, so as to realize the automatic and dynamic adjustment of the back pressure ratio.

[0031] In this embodiment, the substrate 131 has a mounting cavity 21 that corresponds to and is adapted to the voltage regulating component 5. The substrate 131 also has a first channel 31. The first end of the first channel 31 communicates with the mounting cavity 21, and the second end of the first channel 31 communicates with the mounting hole of the hub 133. The medium in the mounting hole of the hub 133 (such as...) Figure 1 As shown, based on the position of the exhaust pipe 11, the pressure of the medium (actually the exhaust pressure) can flow into the mounting cavity 21 through the first channel 31 and can push the valve core 51 to move radially along the base 131. Specifically, as Figure 2 , Figure 5 and Figure 8 As shown, the base 131 has a second channel 32, which extends radially along the base 131. A corresponding valve body 2 is provided at the end of the second channel 32 near the axis of the base 131 (in this embodiment, the other end of the second channel 32 penetrates the outer side of the base 131, so a corresponding plug is provided). An installation cavity 21 is formed inside the valve body 2 near the axis of the base 131.

[0032] Furthermore, in this embodiment, the valve core 51 is formed with a first column segment and a second column segment arranged sequentially, the cross-sectional area of ​​the second column segment being smaller than that of the first column segment; along the radial direction of the base 131, the elastic element (i.e., spring 52) is located at the first end of the first column segment, and the second column segment is located at the second end of the first column segment. Correspondingly, the mounting cavity 21 includes a large-diameter cavity and a small-diameter cavity that are sequentially connected along the radial direction of the base 131, and the small-diameter cavity is connected to the aforementioned first channel 31. Thus, the medium in the mounting hole of the hub 133 can directly act on the end face of the second column segment of the valve core 51. Preferably, in this embodiment, the first channel 31 is formed with an L-shaped structure to ensure that the medium in the mounting hole of the hub 133 acts perpendicularly on the end face of the second column segment, thereby ensuring the sufficiency of the medium's force. Furthermore, an air passage 511 is formed inside the valve core 51, and a first back pressure hole 41 is formed on the bottom end face of the base 131, the first back pressure hole 41 being connected to the mounting cavity 21.

[0033] In other words, along the radial direction of the base 131, the valve core 51 is mainly subjected to the elastic force of the elastic element, the thrust of the medium in the mounting hole of the hub 133, and the thrust of the back pressure acting on the valve core 51 through the first back pressure hole 41. Let the thrust of the medium in the mounting hole of the hub 133 be F1 (F1=P). d ×S1, where P d (S1 is the exhaust pressure, and S1 is the area of ​​the end face of the second column section). The elastic force of the elastic element is set to F2 (F2 = k × L, where k is the constant of spring 52 and L is the displacement distance of spring 52). The thrust F3 acting on the valve core 51 under back pressure is set to (F3 = P). b ×S2, where P b(S1 is the back pressure, and S2 is the effective area of ​​the back pressure acting on the valve core 51). When F1 > F2 + F3, the valve core 51 is pushed to move in a direction away from the axis of the base 131; when F1 < F2 + F3, the valve core 51 is reset under the action of elastic force and back pressure, that is, it moves in a direction closer to the axis of the base 131.

[0034] Thus, when compressor 1 is under normal operating conditions, the discharge pressure is relatively low, F1 < F2 + F3. At this time, when the elastic element is in its natural state, the second column section extends into the interior of the small-diameter cavity and corresponds to and matches the small-diameter cavity. However, when compressor 1 is under cold operating conditions, the discharge pressure increases significantly while the suction pressure decreases, F1 > F2 + F3. The medium in the mounting hole of hub 133 pushes the valve core 51 to move and compresses the spring 52. If the ambient temperature rises, the elastic element and the back pressure of the medium can drive the valve core 51 to reset. It can be seen that the valve core 51 can reciprocate radially along the base 131 according to the ambient temperature under the action of the medium and the elastic element.

[0035] When the compressor 1 is in a cold operating condition, the valve core 51 can be pushed by the medium and moved to the first state position. At this time, the first end of the air passage 511 is connected to the first back pressure hole 41, and the second end of the air passage 511 is connected to the assembly hole of the core or hub 133 of the scroll tooth 132 to form a pressure compensation channel. That is, at this time, additional high-pressure medium (located in the assembly hole of the core or hub 133 of the scroll tooth 132) can be introduced into the compressor 1 to dynamically increase the back pressure, ensuring that the moving plate 13 and the fixed plate 12 can still fit tightly under the high pressure ratio. When the compressor 1 is in a normal operating condition, the valve core 51 can be reset to the second state position under the action of the elastic element and the back pressure of the medium, thereby cutting off the pressure compensation channel, so that the back pressure is restored to the normal level, avoiding excessive sealing force and abnormal wear of the moving plate 13 and the fixed plate 12.

[0036] In addition, the substrate 131 also has a second back pressure hole 42, which is the back pressure hole structure in the existing constant back pressure ratio structure, and will not be described in detail here.

[0037] Specifically, in the first embodiment of the moving plate 13, when in a cold operating condition, the back pressure is increased by introducing a high-pressure medium into the core of the scroll gear 132. This embodiment's structure is suitable for compressors 1 with a pressure ratio of 1.5 to 14. For example... Figures 2 to 4As shown, a first through hole 221 is provided at the end of the valve body 2, through which the second channel 32 and the mounting cavity 21 can be connected; in addition, a third channel 33 is provided between the first back pressure hole 41 and the second channel 32 for connection. The base 131 also has a fourth channel 34, which connects the core of the vortex tooth 132 to the mounting cavity 21. Based on the above structure, the air passage 511 in the valve core 51 is set as an L-shaped structure corresponding to the fourth channel 34 and the first through hole 221.

[0038] Thus, when compressor 1 is in a cold operating condition, such as Figure 3 As shown, F1 > F2 + F3 (at this time, since the pressure compensation channel is not yet open, the low back pressure in F3 is provided by the second back pressure hole 42), which can push the valve core 51 to move to the left to the first state position. The fourth channel 34, air passage 511, first through hole 221, second channel 32, and third channel 33 are connected in sequence to form the pressure compensation channel from the core of the vortex tooth 132 to the first back pressure hole 41. At this time, the back pressure on the moving plate 13 is provided by the first back pressure hole 41, which significantly increases the back pressure (back pressure P). b =P s *R ’ The pressure at this time is greater than R. ’ The value is provided by the core of the vortex tooth 132, R ’ The value is relatively large, thus ensuring the sealing performance between the moving plate 13 and the fixed plate 12. When the compressor 1 is under normal operating conditions, such as Figure 4 As shown, F1 < F2 + F3 (at this time, since the pressure replenishment channel is not yet closed, the high back pressure in F3 is provided by the first back pressure hole 41). Under the action of the elastic element, the valve core 51 moves to the right (or remains) in the second state position. The valve core 51 blocks the second end of the fourth channel 34, so that the pressure replenishment channel is in an open circuit state. At this time, the back pressure on the moving plate 13 is provided by the second back pressure hole 42 (back pressure P). b =P s *R, where the pressure is much smaller than R at this point. ’ (value), to avoid abnormal wear between the moving plate 13 and the fixed plate 12.

[0039] In the second embodiment of the moving disc 13, when in cold operating conditions, the back pressure is increased by introducing a high-pressure medium into the mounting hole of the hub 133. This embodiment is suitable for compressors 1 with a pressure ratio of 1.5 to 18. Figures 5 to 7 As shown, a second through hole 222 is provided on the side of the valve body 2, and a third channel 33 is provided below the second channel 32. The third channel 33 can be connected to the mounting cavity 21 through the second through hole 222, and the third channel 33 is also connected to the first back pressure hole 41. Based on the above structure, the air passage 511 in the valve core 51 is set as an L-shaped structure corresponding to the first channel 31 and the second through hole 222.

[0040] Thus, when compressor 1 is in a cold operating condition, such as Figure 6 As shown, F1 > F2 + F3, which pushes the valve core 51 to the left to the first state position. The first channel 31, the air passage 511, the second through hole 222, and the third channel 33 are connected in sequence to form the pressure compensation channel from the mounting hole of the hub 133 to the first back pressure hole 41. At this time, the back pressure on the moving plate 13 is provided by the first back pressure hole 41, thereby significantly increasing the back pressure (back pressure P). b =P s *C, where C is the resistance coefficient, can be adjusted by changing the diameter of the first back pressure hole 41 (corresponding to the value of C), thus ensuring the sealing between the moving plate 13 and the fixed plate 12. When the compressor 1 is under normal operating conditions, such as Figure 7 As shown, F1 < F2 + F3. Under the action of the elastic element, the valve core 51 moves to the right (or remains in the second state position). The valve core 51 blocks the second through hole 222, so that the pressure compensation channel is in an open state. At this time, the back pressure on the moving plate 13 is provided by the second back pressure hole 42 (back pressure P). b =P s *R, where the pressure at this time is much smaller than the value of C), to avoid abnormal wear between the moving plate 13 and the fixed plate 12.

[0041] In the third embodiment of the moving plate 13, when in a cold operating condition, the back pressure is increased by introducing high-pressure medium into the mounting hole of the core or hub 133 of the scroll gear 132. That is, in the third embodiment, the pressure compensation point can be automatically selected according to the pressure ratio range. The structure in this embodiment is suitable for compressor 1 with a pressure ratio of 1.5 to 18. Figures 8 to 11 As shown, a first through hole 221 is provided at the end of the valve body 2, through which the second channel 32 and the mounting cavity 21 can be connected. Furthermore, a third channel 33 is provided below the second channel 32, and a second through hole 222 is provided on the side of the valve body 2, through which the third channel 33 can be connected to the mounting cavity 21. The second channel 32 is also directly connected to the third channel 33, which is connected to the first back pressure hole 41. The base 131 also has a fourth channel 34, which connects the core of the vortex tooth 132 to the mounting cavity 21. In other words, the mounting cavity 21 can be connected to the first back pressure hole 41 through the first through hole 221, the second channel 32, and the third channel 33, and the mounting cavity 21 can also be connected to the first back pressure hole 41 through the second through hole 222 and the third channel 33. Based on the above structure, the valve core 51 has two air passages 511, namely the first air passage 5111 and the second air passage 5112; the first air passage 5111 is configured as an L-shaped structure corresponding to the fourth channel 34 and the first through hole 221, and the second air passage 5112 is configured as an L-shaped structure corresponding to the first channel 31 and the second through hole 222.

[0042] Thus, when compressor 1 is in a cold operating condition (e.g., when the pressure ratio ε=8), (14:00), such as Figure 9 As shown, F1 > F2 + F3, thus pushing the valve core 51 to the left to the first position of the first state position. The fourth channel 34, the first air passage 5111, the first through hole 221, the second channel 32, and the third channel 33 are connected in sequence to form a pressure-replenishing channel from the core of the vortex tooth 132 to the first back pressure hole 41. At this time, the back pressure on the moving plate 13 is provided by the first back pressure hole 41, thereby significantly increasing the back pressure (back pressure P). b =P s *R ’ The pressure at this time is greater than R. ’ The value is provided by the core of the vortex tooth 132, R ’ The value is relatively large, thus ensuring the sealing between the moving plate 13 and the fixed plate 12. When the ambient temperature further decreases (for example, when the pressure ratio ε = 14~18), the discharge pressure of the compressor 1 further increases, F1 further increases, thereby pushing the valve core 51 to the left to the second position of the first state position, such as... Figure 10 As shown, the first channel 31, the second air passage 5112, the second through hole 222, and the third channel 33 are sequentially connected to form the pressure compensation channel from the mounting hole of the hub 133 to the first back pressure hole 41. At this time, the back pressure on the moving plate 13 is provided by the first back pressure hole 41, thereby significantly increasing the back pressure (back pressure P). b =P s *C, where C is the resistance coefficient, can be adjusted by adjusting the diameter of the first back pressure hole 41 to ensure the sealing between the moving plate 13 and the fixed plate 12.

[0043] When compressor 1 is under normal operating conditions (e.g., when the pressure ratio ε = 1.5~8), such as Figure 11 As shown, F1 < F2 + F3. Under the action of the elastic element, the valve core 51 moves to the right to the second state position. The valve core 51 blocks the second through hole 222 and the second end of the fourth channel 34, so that the pressure compensation channel is in an open state. At this time, the back pressure on the moving plate 13 is provided by the second back pressure hole 42 (back pressure P). b =P s *R, where the pressure is much smaller than R at this point. ’ (and the value of C), to avoid abnormal wear between the moving plate 13 and the fixed plate 12.

[0044] It should be noted that the moving plate 13 in the above three embodiments can be installed in the compressor 1 according to actual needs; and the specifications of the components in the moving plate 13, such as the specifications of the elastic elements, are not specifically limited and should be determined comprehensively, as long as the above technical effects can be achieved. In addition, in this embodiment, the various air passages 511, mounting chambers 21 and channels are all connected by a variable diameter method to achieve the technical effect of throttling.

[0045] According to the adaptive back pressure regulating disc of the present invention, a pressure regulating assembly 5 including a valve core 51 and an elastic element is provided inside the base 131 of the disc 13. The valve core 51 can reciprocate radially along the base 131 and an air passage 511 is formed inside the valve core 51. Thus, the pressure regulating assembly 5 can automatically switch the on / off of the pressure compensation channel according to the real-time change of the difference between the exhaust pressure and the intake pressure, so as to realize the automatic and dynamic adjustment of the back pressure ratio. Specifically, when the compressor 1 is in a cold operating condition, the high-pressure medium inside the compressor 1 pushes the valve core 51 to move to the first state position, thereby opening the pressure compensation channel between the first back pressure hole 41 and the assembly hole of the core or hub 133 of the scroll tooth 132. This allows additional high-pressure medium to be introduced into the compressor 1 to dynamically increase the back pressure, ensuring that the moving plate 13 and the fixed plate 12 can still fit tightly under the high pressure ratio. When the compressor 1 is in a normal operating condition, the valve core 51 is reset to the second state position under the action of the elastic element and the back pressure of the medium, thereby cutting off the pressure compensation channel and restoring the back pressure to the normal level, avoiding excessive sealing force that could cause abnormal wear of the moving plate 13 and the fixed plate 12.

[0046] According to a second aspect of the invention, a compressor 1 is provided, the compressor 1 being provided with an adaptive back pressure regulating disc as described above.

[0047] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. An adaptive back pressure regulating disc, comprising a base, a spiral tooth disposed on the top surface of the base, and a hub disposed on the bottom surface of the base, wherein the bottom surface of the base is formed as a back pressure side, characterized in that, The base is provided with a pressure regulating component, which includes a valve core and an elastic element connected to the valve core. The valve core can reciprocate radially along the base under the action of the medium and the elastic element. An air passage is formed inside the valve core. The bottom surface of the substrate has a first back pressure hole. When the valve core is in the first state position, the first end of the air passage is connected to the first back pressure hole, and the second end of the air passage is connected to the assembly hole of the core of the vortex tooth or the hub to form a pressure compensation channel. When the valve core is in the second state position, the pressure compensation channel is in an open circuit state.

2. The adaptive back pressure regulating disc according to claim 1, characterized in that, The substrate has a mounting cavity that corresponds to and is adapted to the voltage regulating component; the substrate also has a first channel, the first end of the first channel is connected to the mounting cavity, and the second end of the first channel is connected to the assembly hole of the hub. The medium in the mounting hole of the hub can flow into the mounting cavity through the first channel and can push the valve core to move radially along the base.

3. The adaptive back pressure regulating disc according to claim 2, characterized in that, The valve core is formed with a first column segment and a second column segment arranged in sequence, wherein the cross-sectional area of ​​the second column segment is smaller than the cross-sectional area of ​​the first column segment. Along the radial direction of the matrix, the elastic element is located at the first end of the first column segment, and the second column segment is located at the second end of the first column segment.

4. The adaptive back pressure regulating disc according to claim 3, characterized in that, The mounting cavity includes a large-diameter cavity and a small-diameter cavity that are sequentially connected radially along the base, and the small-diameter cavity is connected to the first channel; When the elastic element is in its natural state, the second column extends into the interior of the small-diameter cavity and is adapted to the small-diameter cavity; the medium in the mounting hole of the hub acts on the end face of the second column. When the thrust on the second column segment is greater than the sum of the elastic force of the elastic element and the thrust of the back pressure of the first back pressure hole acting on the valve core, the valve core can move to the first state position under the action of the thrust; when the thrust on the second column segment is less than the sum of the elastic force of the elastic element and the thrust of the back pressure of the first back pressure hole acting on the valve core, the valve core can move to the second state position under the action of the elastic force and the back pressure thrust of the first back pressure hole.

5. The adaptive back pressure regulating disc according to claim 4, characterized in that, The substrate has a second channel extending radially along the substrate; a corresponding valve body is provided at the end of the second channel near the axis of the substrate, and the mounting cavity is formed inside the valve body; the valve body has a first through hole to connect the second channel and the mounting cavity.

6. The adaptive back pressure regulating disc according to claim 5, characterized in that, The first back pressure hole is connected to the second channel through the third channel; the substrate also forms a fourth channel, the first end of the fourth channel is connected to the core of the vortex tooth, and the second end of the fourth channel is connected to the mounting cavity. When the valve core is in the first state position, the fourth channel, the air passage, the first through hole, the second channel, and the third channel are connected in sequence to form the pressure replenishment channel from the core of the vortex tooth to the first back pressure hole; when the valve core is in the second state position, the valve core blocks the second end of the fourth channel so that the pressure replenishment channel is in an open circuit state.

7. The adaptive back pressure regulating disc according to claim 4, characterized in that, The substrate has a second channel that extends radially along the substrate; a corresponding valve body is provided at the end of the second channel near the axis of the substrate, and the mounting cavity is formed inside the valve body; The substrate also has a third channel, the valve body has a second through hole, and the mounting cavity is connected to the first back pressure hole through the second through hole and the third channel; When the valve core is in the first state position, the first channel, the air passage, the second through hole, and the third channel are connected in sequence to form the pressure compensation channel from the assembly hole of the hub to the first back pressure hole; when the valve core is in the second state position, the valve core blocks the second through hole so that the pressure compensation channel is in an open circuit state.

8. The adaptive back pressure regulating disc according to claim 4, characterized in that, The substrate has a second channel extending radially along the substrate; a corresponding valve body is provided at the end of the second channel near the axis of the substrate, and the mounting cavity is formed inside the valve body; the substrate also has a third channel communicating with the second channel; The valve body has a first through hole, and the mounting cavity is connected to the first back pressure hole through the first through hole, the second channel and the third channel; The valve body has a second through hole, and the third channel is also connected to the second through hole. The mounting cavity is connected to the first back pressure hole through the second through hole and the third channel.

9. The adaptive back pressure regulating disc according to claim 8, characterized in that, The valve core has a first air passage and a second air passage. The substrate also has a fourth channel, the first end of which is connected to the core of the vortex tooth, and the second end of which is connected to the mounting cavity. When the valve core is in the first state position, the fourth channel, the first air passage, the first through hole, the second channel, and the third channel are connected in sequence to form the pressure compensation channel from the core of the vortex tooth to the first back pressure hole; or, the first channel, the second air passage, the second through hole, and the third channel are connected in sequence to form the pressure compensation channel from the assembly hole of the hub to the first back pressure hole. When the valve core is in the second state position, the valve core blocks the second end of the fourth channel and the second through hole, so that the pressure replenishment channel is in an open circuit state.

10. A compressor, characterized in that, The compressor is equipped with an adaptive back pressure regulating disc as described in any one of claims 1 to 9.

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