Spring mounting structure of scroll compressor and scroll compressor

Abstract

The utility model relates to the technical field of scroll compressors, in particular to a spring installation structure of a scroll compressor and the scroll compressor, the spring installation structure of the scroll compressor comprises a fixed disc assembly, and the top of the fixed disc assembly is provided with a fixed disc groove; the sealing assembly is arranged right above the groove of the fixed disc, and the sealing assembly can move in the vertical direction; the spring is arranged in the groove of the fixed disc; and the limiting part is arranged between the sealing assembly and the fixed disc groove, and when the sealing assembly moves downwards to a limit position, the limiting part enables a containing space capable of containing the spring to be formed between the fixed disc groove and the sealing assembly. According to the spring mounting structure of the scroll compressor and the scroll compressor, the problem that in an existing scroll compressor, a spring is prone to failure due to overlarge stress borne by the spring can be solved.

Description

Technical Field

[0001] This application relates to the field of scroll compressor technology, and in particular to a spring mounting structure for a scroll compressor and a scroll compressor. Background Technology

[0002] Low-temperature heat pump scroll compressors are positive displacement compressors. Their compression mechanism consists of a stationary scroll component and a moving scroll component. The blades of the moving scroll component mesh with the blades of the stationary scroll component to form a closed cavity. The rotating motion of the moving scroll component reduces the volume of this cavity, thereby compressing the fluid. To separate the fluid in the exhaust and intake chambers, a sealing assembly is typically installed on the top of the stationary scroll to ensure the compressor can operate normally.

[0003] The sealing assembly introduces medium-pressure gas through a through-hole on the back plate of the stationary disc. This medium-pressure gas lifts the sealing assembly, ensuring close contact with the muffler assembly and achieving a seal. However, because low-temperature heat pump scroll compressors need to operate in cold regions, the low evaporation temperature results in insufficient medium-pressure gas to lift the sealing assembly and ensure close contact with the muffler assembly. This prevents proper gas separation between the exhaust and intake chambers, leading to malfunction of the low-temperature heat pump scroll compressor. To address this, a spring is needed to assist in ensuring close contact between the sealing assembly and the muffler assembly. Therefore, low-temperature heat pump scroll compressors place high demands on the reliability of the springs.

[0004] In existing designs, springs are typically positioned within the groove of the stationary disc, located below the sealing assembly. When the scroll compressor stops operating, the high pressure within the compression chamber causes the high-pressure gas to push the scroll disc in the opposite direction, creating a vacuum in the intermediate-pressure chamber. This results in the sealing assembly moving rapidly downwards. Because existing compressor structures lack a limiting structure for the sealing assembly, the spring is compressed by it. This causes the spring to bear stress far exceeding its design stress range. Repeated compression significantly shortens the fatigue life of the spring material. High stress accelerates the initiation and propagation of fatigue cracks, ultimately leading to fatigue fracture of the spring. Once the spring fails, the compressor cannot function properly. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a spring mounting structure for a scroll compressor and a scroll compressor, so as to solve the problem that in existing scroll compressors, the springs are prone to failure due to excessive stress.

[0006] According to a first aspect of the present invention, a spring mounting structure for a scroll compressor is provided, wherein the spring mounting structure for the scroll compressor includes: a fixed plate assembly having a fixed plate groove on its top; a sealing assembly disposed directly above the fixed plate groove, the sealing assembly being movable in a vertical direction; a spring disposed within the fixed plate groove; and a limiting part disposed between the sealing assembly and the fixed plate groove, wherein when the sealing assembly moves downward to its limit position, the limiting part creates a receiving space between the fixed plate groove and the sealing assembly capable of accommodating the spring.

[0007] Preferably, the limiting part is a plurality of annular pads, which are disposed in the groove of the fixed plate. The spring is installed on the radial side of the annular pads. When the sealing assembly moves downward to the limit position, the lower end face of the sealing assembly abuts against the top surface of the annular pads.

[0008] Preferably, the fixed plate groove is an annular groove, and a plurality of the annular pads are interference-fitted with the inner wall surface of the fixed plate groove.

[0009] Preferably, the limiting part is a limiting step, which is formed at the bottom of the fixed plate groove and protrudes from the bottom surface of the fixed plate groove. The spring is disposed on the side of the limiting step. When the sealing assembly moves downward to the limit position, the lower end face of the sealing assembly abuts against the top surface of the limiting step.

[0010] Preferably, the limiting part is a plurality of arc-shaped pads, which are arranged circumferentially in the groove of the fixed plate. The spring is installed on the side of the arc-shaped pads. When the sealing assembly moves downward to the limit position, the lower end face of the sealing assembly abuts against the top surface of the arc-shaped pads.

[0011] Preferably, the limiting part is a limiting protrusion, which is formed at the bottom of the sealing assembly and protrudes from the lower end face of the sealing assembly. The spring is offset from the limiting protrusion. When the sealing assembly moves downward to the limit position, the bottom surface of the limiting protrusion abuts against the bottom of the groove of the fixed plate.

[0012] Preferably, the limiting part is an annular groove, which is formed at the bottom of the sealing assembly. The spring is positioned corresponding to the annular groove, and when the sealing assembly moves downward to its limit position, the spring is located within the annular groove.

[0013] Preferably, the bottom of the groove of the fixed plate is provided with a medium pressure cavity through hole, and the limiting part is arranged to avoid the medium pressure cavity through hole.

[0014] Preferably, an arc-shaped notch is formed on the limiting part, and the arc-shaped notch corresponds to the setting position of the through hole of the intermediate pressure cavity.

[0015] According to a second aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes the spring mounting structure of the scroll compressor as described above.

[0016] The scroll compressor of this utility model has a spring mounting structure and a scroll compressor, wherein the top of the fixed plate assembly is provided with a fixed plate groove. The sealing assembly is located directly above the fixed plate groove and can move in the vertical direction. The spring is disposed within the fixed plate groove. A limiting part is also provided between the sealing assembly and the fixed plate groove. When the sealing assembly moves downward to its limit position, the limiting part can create a receiving space between the fixed plate groove and the sealing assembly that can accommodate the spring, thereby preventing the spring from fatigue fracture due to excessive stress. This effectively solves the problem in existing scroll compressors where the spring is prone to failure due to excessive pressure.

[0017] 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

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the spring mounting structure of the scroll compressor according to the present invention and the first embodiment of the scroll compressor.

[0020] Figure 2 This is a schematic diagram of the first embodiment of the spring mounting structure of the scroll compressor according to the present invention.

[0021] Figure 3 This is a schematic diagram from another angle of the first embodiment of the spring mounting structure of the scroll compressor according to the present invention.

[0022] Figure 4 This is a schematic diagram of a second embodiment of the spring mounting structure of the scroll compressor according to the present invention.

[0023] Figure 5 This is a schematic diagram of the spring mounting structure of the scroll compressor according to the present invention and a third embodiment of the scroll compressor.

[0024] Figure 6 This is a schematic diagram of the stationary plate assembly of the third embodiment of the spring mounting structure of the scroll compressor according to the present invention.

[0025] Figure 7 This is a schematic diagram of the fourth embodiment of the spring mounting structure of the scroll compressor according to the present invention.

[0026] Figure 8 This is a schematic diagram of the spring mounting structure of the scroll compressor according to the present invention and the fifth embodiment of the scroll compressor.

[0027] Figure 9 This is a schematic diagram of the sealing assembly of the fifth embodiment of the spring mounting structure of the scroll compressor according to the present invention.

[0028] Figure 10 This is a schematic diagram of the spring mounting structure of the scroll compressor according to the present invention and the sixth embodiment of the scroll compressor.

[0029] Figure 11 This is a schematic diagram of the sealing assembly of a spring mounting structure for a scroll compressor according to the present invention, according to a sixth embodiment.

[0030] Reference numerals: 1-Fixing plate assembly; 10-Fixing plate groove; 11-Accommodation space; 12-Intermediate pressure chamber through hole; 13-Screw hole; 130-Locking screw; 2-Sealing assembly; 21-Sealing plate; 22-Outer ring; 3-Spring; 40-Arc-shaped notch; 41-Annular pad; 42-Limiting step; 43-Arc-shaped pad; 44-Limiting protrusion; 45-Annular groove. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0035] 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.

[0036] 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.

[0037] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. 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.

[0038] 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.

[0039] 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.

[0040] like Figures 1 to 11 As shown, according to a first aspect of the present invention, a spring mounting structure for a scroll compressor is provided, the spring mounting structure for the scroll compressor including a fixed plate assembly 1, a sealing assembly 2, a spring 3, and a limiting part.

[0041] In the following description, reference will be made to Figures 1 to 11 The specific structure of the aforementioned components and their connection relationships are described in detail in the description of the spring mounting structure of the scroll compressor.

[0042] like Figures 1 to 11 As shown, in this embodiment, a plate groove 10 may be provided on the top of the plate assembly 1. A sealing assembly 2 may be positioned directly above the plate groove 10. The sealing assembly 2 is capable of vertical movement, used to separate the gas in the exhaust chamber and intake chamber of the scroll compressor, enabling the scroll compressor to operate normally. A spring 3 may be disposed within the plate groove 10; the spring 3 may be a wave spring 3. The sealing assembly 2 and the plate groove 10 form a medium-pressure chamber. The spring 3, together with the gas in the medium-pressure chamber, drives the sealing assembly 2 upwards, thereby enabling the sealing assembly 2 to perform its sealing function. A limiting portion may also be provided between the sealing assembly 2 and the plate groove 10. When the sealing assembly 2 moves downwards to its limit position, the limiting portion allows a receiving space 11 to be formed between the plate groove 10 and the sealing assembly 2, capable of accommodating the spring 3 (even if the spring 3 is within its elastic limit), thereby preventing the spring 3 from fatigue fracture due to excessive stress.

[0043] Preferred, such as Figures 1 to 4As shown, in this embodiment, the limiting part can be a plurality of annular pads 41, which can be fixedly installed in the fixed plate groove 10. When there are multiple annular pads 41, the diameters of the multiple annular pads 41 can be equal, and the multiple annular pads 41 can be stacked in the vertical direction. When the diameters of the multiple annular pads 41 are not equal, the multiple annular pads 41 can be arranged radially in the fixed plate groove 10.

[0044] Preferred, such as Figures 1 to 3 As shown, in the first embodiment, there may be one annular pad 41, which is fixed to the bottom of the groove 10. The spring 3 may be installed on the radial side (i.e., the outer or inner circumferential side) of the annular pad 41. When the scroll compressor stops, the gas in the intermediate pressure chamber is evacuated, and the sealing assembly 2 moves rapidly downward under the action of the pressure difference. When the sealing assembly 2 moves downward to its limit position, the lower end face of the sealing assembly 2 abuts against the top surface of the annular pad 41, thereby stopping the movement of the sealing assembly 2. At this time, the spring 3 is located within the receiving space 11, thereby preventing the spring 3 from bearing excessive stress.

[0045] Further, preferably, in the first embodiment, the annular pad 41 can be fixed in the fixed plate groove 10 by locking screws 130. Specifically, the bottom of the fixed plate groove 10 may have multiple screw holes 13. Multiple locking screws 130 can pass through the annular pad 41 and be installed in the screw holes 13. This can fix the position of the annular pad 41 to prevent the annular pad 41 from moving in the fixed plate groove 10. More preferably, the number of locking screws 130 can be two, and the two locking screws 130 are respectively installed on both sides of the annular pad 41.

[0046] Preferred, such as Figure 4 As shown, in the second embodiment, the fixed plate groove 10 can be an annular groove. A plurality of the annular pads 41 can be interference-fitted with the inner wall surface of the fixed plate groove 10 (i.e., the inner ring side wall surface of the fixed plate groove 10), thereby fixing the annular pads 41 within the fixed plate groove 10. In this case, no other positioning structure is needed within the annular groove, thus saving on process and materials.

[0047] Preferred, such as Figure 5 and Figure 6As shown, in the third embodiment, the limiting part can be a limiting step 42. The limiting step 42 can be formed at the bottom of the fixed plate groove 10, that is, the limiting part and the fixed plate groove 10 are integrally formed. The limiting step 42 can protrude from the bottom surface of the fixed plate groove 10. The limiting step 42 can be formed as a ring, and the spring 3 can be disposed on the radial side of the limiting step 42. When the scroll compressor stops, the gas in the intermediate pressure chamber is evacuated, and the sealing assembly 2 moves rapidly downward under the action of the pressure difference. When the sealing assembly 2 moves downward to the limit position, the lower end face of the sealing assembly 2 abuts against the top surface of the limiting step 42, thereby stopping the movement of the sealing assembly 2. At this time, the spring 3 is located in the receiving space 11, thereby avoiding the spring 3 from bearing excessive stress.

[0048] Preferred, such as Figure 7 As shown, in the fourth embodiment, the limiting part can be a plurality of arc-shaped pads 43, which can be arranged circumferentially within the fixed plate groove 10. The spring 3 can be installed on the radial side of the arc-shaped pad 43. When the scroll compressor stops, the gas in the intermediate pressure chamber is evacuated, and the sealing assembly 2 moves rapidly downward under the action of the pressure difference. When the sealing assembly 2 moves downward to its limit position, the lower end face of the sealing assembly 2 abuts against the top surface of the arc-shaped pad 43, thereby stopping the movement of the sealing assembly 2. At this time, the spring 3 is located within the receiving space 11, thereby preventing the spring 3 from bearing excessive stress.

[0049] Furthermore, preferably, such as Figure 7 As shown, in the fourth embodiment, two arc-shaped pads 43 can be provided in the fixed plate groove 10, and the arc-shaped pads 43 can be semi-circular. The arc-shaped pads 43 can be fixed in the fixed plate groove 10 by locking screws 130 to prevent the arc-shaped pads 43 from moving in the fixed plate groove 10. This arrangement allows the lubricating oil between the inner wall surface of the fixed plate groove 10 and the arc-shaped pads 43 to flow to the spring 3 side, thereby reducing the wear of the spring 3 and improving the reliability of the spring 3.

[0050] In addition, preferred, such as Figures 1 to 7 As shown, in this embodiment, the bottom of the groove of the fixed plate groove 10 may be provided with a medium-pressure cavity through hole 12. The limiting part can be arranged to avoid the medium-pressure cavity through hole 12, so as to avoid the limiting part blocking the medium-pressure cavity through hole 12 and affecting the gas flow. Specifically, an arc-shaped notch 40 may be formed on the annular pad 41 or the arc-shaped pad 43. The arc-shaped notch 40 corresponds to the setting position of the medium-pressure cavity through hole 12, thereby avoiding the medium-pressure cavity through hole 12. It is not limited to this, the medium-pressure cavity through hole 12 may also be set at the interval between two arc-shaped pads 43.

[0051] Preferred, such as Figure 8 and Figure 9 As shown, in the fifth embodiment, the limiting part can be a limiting protrusion 44. The limiting protrusion 44 can be formed at the bottom of the sealing assembly 2. Specifically, the sealing assembly 2 can include a sealing plate 21 and an outer ring 22. The sealing plate 21 is sleeved on the inner wall surface of the fixed plate groove 10, and the outer ring 22 is sleeved on the outer periphery of the sealing plate 21. The limiting protrusion 44 can protrude from the lower end face of the sealing assembly 2. The spring 3 can be horizontally offset from the limiting protrusion 44 to avoid interference between the limiting protrusion 44 and the spring 3. When the scroll compressor stops, the gas in the intermediate pressure chamber is evacuated, and the sealing assembly 2 moves rapidly downward under the action of the pressure difference. When the sealing assembly 2 moves downward to the limit position, the bottom surface of the limiting protrusion 44 abuts against the bottom of the fixed plate groove 10. At this time, the spring 3 is located in the receiving space 11, thereby preventing the spring 3 from bearing excessive stress.

[0052] Preferred, such as Figure 10 and Figure 11 As shown, in the sixth embodiment, the limiting part can be an annular groove 45. The annular groove 45 is formed at the bottom of the sealing assembly 2. Specifically, the annular groove 45 can be formed at the bottom of the outer ring 22 of the sealing assembly 2, such that the bottom surface of the outer ring 22 is higher than the bottom surface of the sealing plate 21 of the sealing assembly 2. The spring 3 can correspond to the setting position of the annular groove 45, that is, the spring 3 can be set directly below the annular groove 45. When the scroll compressor stops, the gas in the intermediate pressure chamber is evacuated, and the sealing assembly 2 moves rapidly downward under the action of the pressure difference. When the sealing assembly 2 moves downward to the limit position, the spring 3 is located in the annular groove 45. At this time, the receiving space 11 is formed by the annular groove 45 and the fixed plate groove 10, and the spring 3 is located in the receiving space 11, thereby avoiding the spring 3 from bearing excessive stress.

[0053] In addition, such as Figures 1 to 11 As shown, according to a second aspect of the present invention, a scroll compressor is provided, the scroll compressor including the spring mounting structure of the scroll compressor as described above.

[0054] During use, the scroll compressor has a limiting part in its spring mounting structure. When the sealing component 2 moves downward to its limit position, the limiting part can form a receiving space 11 between the fixed plate groove 10 and the sealing component 2, which can accommodate the spring 3. This prevents the spring 3 from fatigue fracture due to excessive stress, thereby improving the service life of the scroll compressor.

[0055] 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. A spring-mounted structure for a scroll compressor, disposed on a scroll compressor, characterized in that, The spring mounting structure of the scroll compressor includes: A plate-fixing assembly, wherein a plate-fixing groove is provided on the top of the plate-fixing assembly; A sealing assembly is disposed directly above the groove of the fixed plate, and the sealing assembly is movable in the vertical direction; A spring is disposed within the groove of the fixed plate; and A limiting part is disposed between the sealing assembly and the fixed plate groove. When the sealing assembly moves downward to its limit position, the limiting part creates a receiving space between the fixed plate groove and the sealing assembly that can accommodate the spring.

2. The spring mounting structure of the scroll compressor according to claim 1, characterized in that, The limiting part consists of several annular pads, which are disposed in the groove of the fixed plate. The spring is installed on the radial side of the annular pads. When the sealing assembly moves downward to the limit position, the lower end face of the sealing assembly abuts against the top surface of the annular pads.

3. The spring mounting structure of the scroll compressor according to claim 2, characterized in that, The fixed plate groove is an annular groove, and several annular pads are interference-fitted with the inner wall surface of the fixed plate groove.

4. The spring mounting structure of the scroll compressor according to claim 1, characterized in that, The limiting part is a limiting step, which is formed at the bottom of the fixed plate groove and protrudes from the bottom surface of the fixed plate groove. The spring is disposed on the side of the limiting step. When the sealing assembly moves downward to the limit position, the lower end face of the sealing assembly abuts against the top surface of the limiting step.

5. The spring mounting structure of the scroll compressor according to claim 1, characterized in that, The limiting part consists of several arc-shaped pads, which are arranged circumferentially within the groove of the fixed plate. The spring is installed on the side of the arc-shaped pads. When the sealing assembly moves downward to its limit position, the lower end face of the sealing assembly abuts against the top surface of the arc-shaped pads.

6. The spring mounting structure of the scroll compressor according to claim 1, characterized in that, The limiting part is a limiting protrusion, which is formed at the bottom of the sealing assembly. The limiting protrusion protrudes from the lower end face of the sealing assembly. The spring is offset from the limiting protrusion. When the sealing assembly moves downward to the limit position, the bottom surface of the limiting protrusion abuts against the bottom of the groove of the fixed plate.

7. The spring mounting structure of the scroll compressor according to claim 1, characterized in that, The limiting part is an annular groove, which is formed at the bottom of the sealing assembly. The spring is positioned corresponding to the annular groove. When the sealing assembly moves downward to its limit position, the spring is located inside the annular groove.

8. The spring mounting structure of the scroll compressor according to any one of claims 2 to 5, characterized in that, The bottom of the groove of the fixed plate is provided with a medium pressure cavity through hole, and the limiting part is arranged to avoid the medium pressure cavity through hole.

9. The spring mounting structure of the scroll compressor according to claim 8, characterized in that, An arc-shaped notch is formed on the limiting part, and the arc-shaped notch corresponds to the setting position of the through hole of the intermediate pressure cavity.

10. A scroll compressor, characterized in that, The scroll compressor includes the spring-mounted structure of the scroll compressor according to any one of claims 1 to 9.

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