Pressure ratio adjusting structure for scroll compressor and scroll compressor
By setting a connecting hole on the stationary plate component of the scroll compressor, the fluid can be discharged in a timely manner during the movement of the moving plate component, which improves energy efficiency and solves the problem of untimely fluid discharge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JOHNSON CONTROLS HITACHI WANBAO COMPRESSOR GUANGZHOU CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-08
AI Technical Summary
In the early exhaust stage of existing scroll compressors, fluid cannot be discharged in a timely and effective manner, resulting in reduced energy efficiency.
Design a pressure ratio adjustment structure for a scroll compressor, which uses a fixed plate component with multiple connecting holes. The connecting holes are formed with strip-shaped and arc-shaped ends, and can be opened or closed simultaneously during the movement of the moving plate component, connecting the exhaust chamber with the intermediate pressure chamber or the high pressure chamber.
By reducing the number of connecting holes, the fluid flow area is increased, the orifice area can be flexibly adjusted, the problem of untimely fluid discharge is solved, and the over-compression power consumption is reduced.
Smart Images
Figure CN224214362U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of scroll compressor technology, and in particular to a pressure ratio adjustment structure for a scroll compressor and a scroll compressor. Background Technology
[0002] A scroll compressor is a type of positive displacement compressor. Its compression mechanism consists of a fixed plate component and a moving plate component. The blades of the moving plate component mesh with the blades of the fixed plate component to form a closed cavity. The moving plate component reduces the volume of the cavity through its rotational motion, thereby achieving the effect of compressing the fluid.
[0003] In actual operation of a scroll compressor, its discharge pressure is usually higher than the application pressure. In this case, the pressure exceeding the application pressure results in additional energy consumption, i.e., overcompression. This phenomenon significantly reduces the energy efficiency of a hermetic scroll compressor. Therefore, circular straight holes are typically made in the stator to work with corresponding valve assemblies to adjust the pressure ratio, achieving earlier discharge and reducing overcompression power consumption.
[0004] However, under space constraints, circular straight holes have significant limitations, severely restricting both the possible aperture size and the number of holes. This structural limitation results in a smaller fluid flow area, causing the fluid to be unable to be discharged effectively and in a timely manner during the pre-venting stage. Utility Model Content
[0005] In view of this, the purpose of this application is to provide a pressure ratio adjustment structure for a scroll compressor and a scroll compressor, so as to solve the problem that the fluid cannot be discharged in a timely and effective manner during the early discharge stage of the existing scroll compressor.
[0006] According to a first aspect of this utility model, a pressure ratio adjustment structure for a scroll compressor is provided, comprising: a fixed plate component, wherein an exhaust chamber is provided on one side of the fixed plate component and a fixed scroll blade is provided on the other side of the fixed plate component; a moving plate component, wherein a moving scroll blade is provided, the moving scroll blade meshing with the fixed scroll blade, the fixed scroll blade and the moving scroll blade enclosing an intermediate pressure chamber and a high pressure chamber; and a plurality of connecting holes provided in the fixed plate component, the connecting holes forming a strip-shaped middle portion and an arc-shaped end portion, the connecting holes being able to connect the exhaust chamber with the intermediate pressure chamber or the high pressure chamber; during the movement of the moving plate component, the plurality of connecting holes can be kept open or closed simultaneously by the moving scroll blade.
[0007] Preferably, the connecting hole includes a first connecting hole, the middle part of the first connecting hole is formed into a straight strip shape, the end of the first connecting hole is formed into an arc shape, and the curved surface of the end of the first connecting hole is tangent to the straight surface of the middle part of the first connecting hole.
[0008] Preferably, the connecting hole includes a second connecting hole, the middle part of the second connecting hole is formed into an arc shape with a radius of R1, the end of the second connecting hole is formed into an arc shape with a radius of R2, and R1>R2, and the curved surface of the end of the second connecting hole is tangent to the curved surface of the middle part of the second connecting hole.
[0009] Preferably, the number of connecting holes is 2 to 6.
[0010] Preferably, the plurality of the connecting holes are arranged along the extension direction of the fixed vortex blade.
[0011] Preferably, a portion of the connecting holes are provided along the inner side of the fixed vortex blade, and another portion of the connecting holes are provided along the outer side of the fixed vortex blade.
[0012] Preferably, the distance between the connecting hole and the fixed vortex blade is ≥0.05mm.
[0013] Preferably, the straight-line distance between adjacent connecting holes is ≥0.5mm.
[0014] Preferably, the fixed plate component includes a fixed plate portion, the fixed vortex blade is disposed on the fixed plate portion, and the connecting hole penetrates the fixed plate portion in the vertical direction.
[0015] According to a second aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes the pressure ratio adjustment structure for a scroll compressor as described above.
[0016] This utility model discloses a scroll compressor with a pressure ratio adjustment structure and a scroll compressor. One side of the fixed plate component has an exhaust chamber, and the other side has fixed scroll blades. The moving plate component has moving scroll blades, which mesh with the fixed scroll blades to enclose an intermediate-pressure chamber and a high-pressure chamber. Multiple connecting holes are formed in the fixed plate component, each with a strip-shaped middle section and an arc-shaped end. These connecting holes connect the exhaust chamber to the intermediate-pressure chamber or the high-pressure chamber. During the movement of the moving plate component, the multiple connecting holes can be opened or closed simultaneously by the moving scroll blades. This arrangement allows for a larger fluid flow area while reducing the number of connecting holes. Furthermore, the shape of the connecting holes is easier to adjust the envelope area of the orifice according to space constraints, offering greater flexibility in arrangement compared to circular straight holes. This effectively solves the problem of fluid not being discharged promptly and effectively during the pre-exhaust stage in existing scroll compressors.
[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 first connecting hole of the pressure ratio adjustment structure for the scroll compressor according to this utility model being disposed on the stationary plate component.
[0020] Figure 2 This is a schematic diagram showing the first connecting hole of the pressure ratio adjustment structure for the scroll compressor according to this utility model being located at another angle of the stationary plate component.
[0021] Figure 3 This is a schematic diagram of the second connecting hole of the pressure ratio adjustment structure for the scroll compressor according to this utility model being disposed on the stationary plate component.
[0022] Figure 4 This is a schematic diagram showing the second connecting hole of the pressure ratio adjustment structure for the scroll compressor according to this utility model being located at another angle of the stationary plate component.
[0023] Figure 5 This is a comparison diagram of the first connecting hole and the circular straight hole in the pressure ratio adjustment structure of the scroll compressor according to this utility model.
[0024] Figure 6 This is a comparison diagram of the second connecting hole and the circular straight hole in the pressure ratio adjustment structure of the scroll compressor according to this utility model.
[0025] Reference numerals: 1-Fixed plate component; 10-Exhaust chamber; 11-Medium pressure chamber; 12-High pressure chamber; 100-Fixed plate part; 2-Connecting hole; 21-First connecting hole; 22-Second connecting hole; 3-Fixed vortex blade; 31-Inner side; 32-Outer side; 4-Circular straight hole. Detailed Implementation
[0026] 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.
[0027] 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.
[0028] 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.
[0029] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] like Figures 1 to 6 As shown, according to a first aspect of the present invention, a pressure ratio adjustment structure for a scroll compressor is provided, the pressure ratio adjustment structure for a scroll compressor including a fixed plate component 1, a moving plate component, and a connecting hole 2.
[0036] In the following description, reference will be made to Figures 1 to 6 The specific structure of the components of the pressure ratio adjustment structure used in the scroll compressor and the connection relationship of the components are described in detail.
[0037] like Figures 1 to 6As shown, in this embodiment, an exhaust chamber 10 can be provided on one side of the fixed plate component 1, and a fixed vortex blade 3 can be provided on the other side of the fixed plate component 1. The moving plate component can be provided with a moving vortex blade, which can mesh with the fixed vortex blade 3. The moving vortex blade and the fixed vortex blade 3 can form a medium-pressure chamber 11 and a high-pressure chamber 12. The fixed plate component 1 can be provided with multiple connecting holes 2, which can be formed with a strip-shaped middle part and an arc-shaped end. During the movement of the moving plate component, the position of the moving vortex blade changes, and the position of the medium-pressure chamber 11 and the high-pressure chamber 12 also changes, so that the connecting holes 2 can connect the exhaust chamber 10 with the medium-pressure chamber 11 or the high-pressure chamber 12. When the moving vortex blade completely covers the connecting hole 2, the connecting hole 2 is closed; when the moving vortex blade does not completely cover the connecting hole 2, the connecting hole 2 is open. When the moving vortex blade moves to the first preset position, it can simultaneously cover all the connecting holes 2. When the moving vortex blade moves to the second preset position, it can simultaneously offset from all the connecting holes 2. That is, multiple connecting holes 2 can be kept open or closed simultaneously by the moving vortex blade. This arrangement allows for a larger fluid flow area while reducing the number of connecting holes 2. In addition, the shape of the connecting holes 2 is easier to adjust the envelope area of the orifice according to space constraints, making it more flexible in arrangement compared to circular straight holes 4.
[0038] Specifically, such as Figures 1 to 4 As shown, in this embodiment, the fixed plate component 1 may include a fixed plate portion 100, and the connecting hole 2 may be formed on the fixed plate portion 100. The fixed vortex blade 3 may be disposed on the lower side of the fixed plate portion 100, i.e., the intermediate pressure chamber 11 and the high pressure chamber 12 are formed on the lower side of the fixed plate portion 100. The exhaust chamber 10 may be disposed on the upper side of the fixed plate portion 100. The connecting hole 2 penetrates the fixed plate portion 100 vertically, thereby connecting the exhaust chamber 10 with the intermediate pressure chamber 11 or the high pressure chamber 12. As the position of the moving vortex blade changes, the chamber connected by the connecting hole 2 also changes accordingly.
[0039] Preferred, such as Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the connecting hole 2 may include a first connecting hole 21, which may be a straight, waist-shaped hole. The middle portion of the first connecting hole 21 may be formed as a straight strip, while the end portion may be formed as an arc. The curved surface of the end portion of the first connecting hole 21 may be tangent to the straight surface of the middle portion, meaning the width of the middle portion of the first connecting hole 21 is equal to the diameter of the end portion.
[0040] This configuration facilitates adjustment of the dimensions of the first connecting hole 21. The diameter of the arc at the end of the first connecting hole 21 can be used to adjust the size of the orifice, and the length of the strip in the middle of the first connecting hole 21 can be used to adjust the maximum flow area of the envelope. The arrangement angle of the first connecting hole 21 can be adaptively adjusted according to actual needs to ensure that the first connecting hole 21 can connect the exhaust chamber 10 with the medium-pressure chamber 11 or the high-pressure chamber 12.
[0041] In this embodiment, the shape design of the first connecting hole 21 effectively reduces the number of openings while achieving a larger fluid flow area. For example... Figure 5 As shown, at the same hole positioning location, while ensuring the distance between holes is ≥1mm, only two circular straight holes 4 with a diameter of 2.5mm can be set in the same area, and the total flow area is only 9.81mm². 2 The flow area of the first connecting hole 21 can reach 26.97 mm. 2 Meanwhile, the axial arrangement angle of the first connecting hole 21 can be adjusted according to actual needs to avoid space constraints. While ensuring the same flow area, the first connecting hole 21 has greater flexibility than the circular straight hole 4.
[0042] Preferred, such as Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, the connecting hole 2 may further include a second connecting hole 22, which may be a curved hole. The middle portion of the second connecting hole 22 may be formed as an arc with a radius of R1 (i.e., the outer radius of the middle portion of the second connecting hole 22 is R1), and the end portion of the second connecting hole 22 may be formed as an arc with a radius of R2, where R1 > R2. The curved surface of the end portion of the second connecting hole 22 may be tangent to the curved surface of the middle portion of the second connecting hole 22, that is, the width of the middle portion of the second connecting hole 22 is equal to the diameter of the end portion of the second connecting hole 22, and the width of the middle portion of the second connecting hole 22 is the distance between the inner and outer circles.
[0043] This configuration facilitates adjustment of the dimensions of the second connecting hole 22. The diameter of the arc at the end of the second connecting hole 22 can be used to adjust the size of the orifice, while the diameter of the arc in the middle of the second connecting hole 22 can be used to adjust the maximum flow area of the envelope. The arrangement angle of the second connecting hole 22 can be adaptively adjusted according to actual needs to ensure that the second connecting hole 22 can connect the exhaust chamber 10 with the medium-pressure chamber 11 or the high-pressure chamber 12.
[0044] In this embodiment, the shape design of the second connecting hole 22 effectively reduces the number of openings while achieving a larger flow area at the opening. For example... Figure 6As shown, at the same hole positioning location, while ensuring the distance between holes is ≥1mm, only four circular straight holes 4 with a diameter of 3mm can be set in the same area, and the total flow area is only 28.26mm². 2 The flow area of the second connecting hole 22 can reach 42.41 mm. 2 Furthermore, the diameter of the second connecting hole 22 can be adaptively adjusted according to the shape of the fixed vortex blade 3. While ensuring the same flow area, the second connecting hole 22 offers greater flexibility compared to the circular straight hole 4.
[0045] Preferred, such as Figures 1 to 4 As shown, in this embodiment, the stationary plate component 1 may only have a plurality of first connecting holes 21, or the stationary plate component 1 may only have a plurality of second connecting holes 22. However, it is not limited to this; the stationary plate component may also have both first connecting holes 21 and second connecting holes 22. In addition, the stationary plate component may also have an additional circular straight hole, as long as it can realize the function of adjusting the pressure ratio of the scroll compressor.
[0046] Preferred, such as Figures 1 to 4 As shown in the embodiment, the number of connecting holes 2 on the stationary plate component 1 can be 2 to 6, thereby ensuring sufficient fluid flow area. If too few connecting holes 2 are provided (such as only one connecting hole 2), the symmetrical distribution of the connecting holes 2 cannot be guaranteed, that is, the force balance cannot be guaranteed, resulting in a large overturning force on the stationary plate component 1. If too many connecting holes 2 are provided, the connecting holes 2 will be scattered, and the moving vortex blades will not be able to cover all the connecting holes 2 at the same time. At the same time, providing too many connecting holes 2 can also lead to the connecting holes 2 connecting two different chambers during the movement. Therefore, the number of connecting holes 2 on the stationary plate component 1 should be appropriate.
[0047] Further optimized, such as Figures 1 to 4 As shown, in this embodiment, the plurality of connecting holes 2 can be arranged along the extending direction of the fixed vortex blade 3, so that the moving vortex blade can easily cover all the connecting holes 2 simultaneously. More preferably, some of the connecting holes 2 can be arranged along the inner side 31 of the fixed vortex blade 3, and the other part can be arranged along the outer side 32 of the fixed vortex blade 3. This dispersed arrangement of the connecting holes 2 makes more efficient use of limited space, further increasing the fluid flow area while ensuring that the moving vortex blade can cover all the connecting holes 2 simultaneously. At the same time, the dispersed arrangement of the connecting holes 2 also makes the fixed plate component 1 more evenly stressed, preventing overturning.
[0048] In addition, preferred, such as Figures 1 to 4As shown, in this embodiment, the distance between the connecting hole 2 and the fixed vortex blade 3 can be ≥0.05mm to better realize the function of the connecting hole 2. When the distance between the connecting hole 2 and the fixed vortex blade 3 is less than 0.05mm, the connecting hole 2 is not easy to process, and if the connecting hole 2 is too close to the fixed vortex blade 3, it will affect the structural strength of the fixed vortex blade 3. More preferably, the straight-line distance between two adjacent connecting holes 2 can be ≥0.5mm (i.e., the distance between the edges of adjacent connecting holes 2) to avoid affecting the structural strength of the fixed plate component 1. With this setting, the straight-line distance between adjacent connecting holes 2 can be minimized as much as possible while ensuring the strength of the connecting holes 2 and preventing the connecting holes 2 from being blocked.
[0049] Furthermore, according to a second aspect of the present invention, a scroll compressor is provided, the scroll compressor including the pressure ratio adjustment structure for a scroll compressor as described above.
[0050] During operation, the pressure ratio adjustment structure of the scroll compressor can discharge air in advance, thereby reducing the power consumption generated by the scroll compressor during overcompression. The connecting hole 2 can connect the exhaust chamber 10 with the medium-pressure chamber 11 or the high-pressure chamber 12. The shape of the connecting hole 2 allows for a larger fluid flow area even with a reduced number of orifices, adapting to space-constrained conditions and ensuring timely and effective fluid discharge. Furthermore, the shape of the connecting hole 2 makes it easier to adjust the envelope area of the orifice according to space constraints, offering greater flexibility in arrangement compared to a circular straight hole 4.
[0051] 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 pressure ratio adjustment structure for a scroll compressor, characterized in that, The pressure ratio adjustment structure used in the scroll compressor includes: A fixed plate component, wherein an exhaust chamber is provided on one side of the fixed plate component and a fixed vortex blade is provided on the other side of the fixed plate component; A moving disk component, wherein the moving disk component is provided with moving scroll blades, the moving scroll blades meshing with fixed scroll blades, the fixed scroll blades and the moving scroll blades enclosing a medium-pressure chamber and a high-pressure chamber; and Multiple connecting holes are provided on the fixed plate component. The connecting holes are formed with a strip-shaped middle part and an arc-shaped end part. The connecting holes can connect the exhaust chamber with the medium pressure chamber or the high pressure chamber. During the movement of the moving disk component, the multiple connecting holes can be kept open or closed simultaneously by the moving vortex blades.
2. The pressure ratio adjustment structure for a scroll compressor according to claim 1, characterized in that, The connecting hole includes a first connecting hole, the middle part of which is formed into a straight strip shape, and the end of which is formed into an arc shape. The curved surface of the end of the first connecting hole is tangent to the straight surface of the middle part of the first connecting hole.
3. The pressure ratio adjustment structure for a scroll compressor according to claim 1 or 2, characterized in that, The connecting hole includes a second connecting hole, the middle part of which is formed into an arc shape with a radius of R1, and the end of which is formed into an arc shape with a radius of R2, where R1 > R2, and the curved surface of the end of the second connecting hole is tangent to the curved surface of the middle part of the second connecting hole.
4. The pressure ratio adjustment structure for a scroll compressor according to claim 1, characterized in that, The number of connecting holes is 2 to 6.
5. The pressure ratio adjustment structure for a scroll compressor according to claim 4, characterized in that, The plurality of the connecting holes are arranged along the extension direction of the fixed vortex blade.
6. The pressure ratio adjustment structure for a scroll compressor according to claim 5, characterized in that, One portion of the connecting holes is provided along the inner side of the fixed vortex blade, and the other portion of the connecting holes is provided along the outer side of the fixed vortex blade.
7. The pressure ratio adjustment structure for a scroll compressor according to claim 5, characterized in that, The distance between the connecting hole and the fixed vortex blade is ≥0.05mm.
8. The pressure ratio adjustment structure for a scroll compressor according to claim 1, characterized in that, The straight-line distance between adjacent connecting holes is ≥0.5mm.
9. The pressure ratio adjustment structure for a scroll compressor according to claim 1, characterized in that, The fixed plate component includes a fixed plate portion, the fixed vortex blade is disposed on the fixed plate portion, and the connecting hole penetrates the fixed plate portion in a vertical direction.
10. A scroll compressor, characterized in that, The scroll compressor includes the pressure ratio adjustment structure for a scroll compressor according to any one of claims 1 to 9.