Fixed scroll plate and scroll compressor

Abstract

The utility model relates to the technical field of scroll compressors, in particular to a fixed scroll plate and a scroll compressor, the structure of the fixed scroll plate comprises a fixed scroll plate main body; the air suction hole is formed in the fixed scroll plate main body; the fixed scroll wrap is arranged on a tooth bottom plate of the fixed scroll plate main body; the strip-shaped groove is communicated with the air suction hole, and the strip-shaped groove is formed in the tooth bottom plate. According to the fixed scroll plate and the scroll compressor, the problem that the volume efficiency of an existing scroll compressor is insufficient can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of scroll compressors, and in particular to a fixed scroll and a scroll compressor. Background Art

[0002] In the refrigeration and air conditioning industry, scroll compressors occupy a key position in the market due to their high efficiency and stability. However, with the continuous expansion of application areas and the continuous improvement of performance requirements, the shortcomings of scroll compressors in terms of suction capacity have become increasingly prominent, becoming one of the major bottlenecks restricting their widespread application.

[0003] At present, due to design limitations and limitations of fluid mechanics, traditional scroll compressors often find it difficult to achieve high volumetric efficiency while maintaining efficient compression during the suction process. The suction holes of existing scroll compressors are usually set on the outer edge or side of the fixed scroll disk, and are connected to the air inlet through the suction holes to ensure that low-pressure gas can smoothly enter the suction chamber. However, in actual applications, due to factors such as structural design, manufacturing accuracy and operating conditions, certain losses and leakages will occur, thereby reducing the volumetric efficiency of the scroll compressor. This causes the scroll compressor to be unable to cope with large flow and high speed conditions, and cannot meet the needs of modern refrigeration systems for efficient and rapid refrigeration. Utility Model Content

[0004] In view of this, an object of the present application is to provide a fixed scroll and a scroll compressor to solve the problem of insufficient volumetric efficiency of existing scroll compressors.

[0005] According to the utility model, a fixed scroll is provided, wherein the fixed scroll includes: a fixed scroll body; an air intake hole, which is opened on the fixed scroll body; a fixed scroll tooth, which is arranged on a tooth bottom plate of the fixed scroll body; and a strip groove, which is connected to the air intake hole, and the strip groove is opened on the tooth bottom plate.

[0006] Preferably, the strip-shaped groove extends in an arc shape, and the extending direction of the strip-shaped groove is the same as the extending direction of the fixed scroll gear.

[0007] Preferably, the end of the strip groove is communicated with the air suction hole, and a chamfer is provided at the connection between the strip groove and the air suction hole.

[0008] Preferably, the width of the strip-shaped groove gradually decreases in a direction away from the air suction hole.

[0009] Preferably, the depth of the strip groove is 0.2 to 0.4 times the thickness of the tooth bottom plate.

[0010] Preferably, the air intake hole includes: a first air inlet formed on a first side surface of the fixed scroll body; and a second air inlet communicated with the first air inlet and formed on a second side surface of the fixed scroll body.

[0011] Preferably, when the suction chamber formed by the outer line of the fixed scroll and the inner line of the moving scroll finishes suctioning, the minimum distance between the inner line of the moving scroll and any point on the boundary line of the strip groove is greater than or equal to the tooth thickness t of the fixed scroll tooth.

[0012] Preferably, when the suction cavity formed by the outer line of the moving scroll and the inner line of the fixed scroll finishes suctioning, the minimum distance between the outer line of the moving scroll and any point on the boundary line of the strip groove is greater than or equal to the tooth thickness t of the fixed scroll tooth.

[0013] Preferably, the tooth thickness t is the average value of the thickness of the fixed scroll tooth within the first range, and the first range is the line connecting the midpoint of the fixed scroll body and the midpoint of the first air inlet, and the interval included in the deflection of 20° to 60° in the direction close to the strip groove.

[0014] According to a second aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes the fixed scroll as described above.

[0015] The fixed scroll and scroll compressor of the present invention have an air intake hole formed in the fixed scroll body, and the fixed scroll teeth are disposed on a tooth base plate of the fixed scroll body. Strip grooves are formed in the tooth base plate and connected to the air intake hole, thereby increasing the area of ​​the air intake passage and reducing aerodynamic resistance within the passage. This improves the volumetric efficiency of the scroll compressor, enabling it to adapt to a wider range of operating environments and meet higher performance requirements. This effectively addresses the insufficient volumetric efficiency of existing scroll compressors.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of a fixed scroll according to the utility model.

[0019] Figure 2 According to the utility model Figure 1 AOA cross-sectional view.

[0020] Figure 3 It is a partial schematic diagram of the air suction hole of the fixed scroll according to the utility model.

[0021] Figure 4 It is a cross-sectional view of the strip groove of the fixed scroll according to the utility model.

[0022] Figure 5 It is a schematic diagram of the engagement of the fixed scroll and the moving scroll according to the present utility model.

[0023] Figure 6 This is another schematic diagram of the engagement between the fixed scroll and the moving scroll according to the present invention.

[0024] Figure 7 It is a schematic diagram of a first range of the fixed scroll according to the present invention.

[0025] Figure markings: 1-fixed scroll body; 10-tooth base plate; 100-thickness of tooth base plate; 11-first side; 12-second side; 2-intake hole; 21-first air inlet; 22-second air inlet; 3-fixed scroll tooth; 4-strip groove; 40-chamfer; 41-groove depth; 5-moving scroll; 6-compression chamber; 60-minimum sealing distance; 7-tooth thickness t; 81-inner line of moving scroll; 82-outer line of fixed scroll; 9-first range; 91-first angle; 92-second angle. DETAILED DESCRIPTION

[0026] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon 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. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[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 possible ways to implement the methods, devices, 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,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0029] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0030] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0031] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," 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 relational terms used herein will be interpreted accordingly.

[0032] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0033] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0034] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0035] like Figures 1 to 7 As shown, according to a first aspect of the present invention, a fixed scroll is provided, which includes a fixed scroll body 1 , an air suction hole 2 , a fixed scroll tooth 3 and a strip groove 4 .

[0036] In the following description, reference will be made to Figures 1 to 7 The specific structure of the above components of the fixed scroll and the connection relationship of the above components are described in detail.

[0037] like Figures 1 to 7 As shown, in an embodiment, an air intake hole 2 may be provided on the fixed scroll body 1. The fixed scroll tooth 3 may be provided on the tooth base plate 10 of the fixed scroll body 1. The strip groove 4 may be provided on the tooth base plate 10. The strip groove 4 may be connected to the air intake hole 2. This arrangement increases the area of ​​the air intake passage of the fixed scroll and reduces the aerodynamic resistance of the air intake passage, thereby improving the volumetric efficiency of the scroll compressor and enabling the scroll compressor to adapt to a wider range of working environments and higher performance requirements.

[0038] Preferably, Figure 1 and Figure 2 As shown, in the embodiment, the fixed scroll body 1 can be approximately disc-shaped, and the air intake hole 2 can pass through the fixed scroll body 1. The air intake hole 2 can include a first air inlet 21 and a second air inlet 22. The first air inlet 21 can be formed on the first side surface 11 of the fixed scroll body 1 (which can be as shown in FIG. Figure 2 The second air inlet 22 may be formed on the second side surface 12 of the fixed scroll body 1 (which may be as shown in FIG. Figure 2The first air inlet 21 and the second air inlet 22 can be approximately circular, and the second air inlet 22 is connected to the first air inlet 21. The diameter of the first air inlet 21 can be larger than the diameter of the second air inlet 22, and the axis of the first air inlet 21 and the axis of the second air inlet 22 can be non-collinear. The air intake hole 2 is a channel formed between the second air inlet 22 and the first air inlet 21.

[0039] Preferably, Figure 2 As shown, in an embodiment, the middle portion of the fixed scroll body 1 can be formed into a groove, and the bottom of the groove is the tooth base plate 10. The fixed scroll 3 is arranged in the groove and is perpendicular to the plate surface of the tooth base plate 10. Preferably, the fixed scroll 3 can be integrally formed with the tooth base plate 10. The fixed scroll 3 can be formed into a spiral shape, and the strip groove 4 is provided between two adjacent layers of fixed scroll 3.

[0040] Preferably, Figures 1 to 3 As shown, in the embodiment, the strip groove 4 can extend into an arc shape, and the strip groove 4 can be opened on the side of the tooth bottom plate 10 where the fixed scroll gear 3 is provided (ie, as shown in FIG. Figure 2 Preferably, the extending direction of the strip groove 4 can be the same as the extending direction of the fixed scroll gear 3, that is, the rotation direction of the strip groove 4 can be the same as the rotation direction of the fixed scroll gear 3.

[0041] Further, preferably, Figures 1 to 3 As shown, in this embodiment, the strip groove 4 can be connected to the air intake hole 2 at its end. Specifically, the air intake hole 2 can have a notch formed at the connection with the strip groove 4. Furthermore, a chamfer 40 can be provided at the connection between the strip groove 4 and the air intake hole 2 to reduce resistance and minimize burrs and sharp edges generated during processing.

[0042] More preferably, Figures 1 to 4 As shown, in the embodiment, the cross-section of the strip groove 4 can be approximately rectangular, and the width of the strip groove 4 can gradually decrease in the direction away from the air intake hole 2. In addition, the depth of the strip groove 4 (i.e., the groove depth 41) can be 0.2 to 0.4 times (for example, 0.2 times, 0.3 times or 0.4 times) the thickness 100 of the tooth bottom plate. In this way, the strip groove 4 can better increase the air intake area and reduce the aerodynamic resistance. However, it is not limited to this. The above setting method is only a preferred setting of the strip groove 4. In the actual production process, the strip groove can also be set to other situations. For example, the cross-section of the strip groove can be set to a triangle, a trapezoid or a circular arc, and the depth of the strip groove can also be set to a constant value.

[0043] Preferably, Figure 5 and Figure 6As shown, in an embodiment, the fixed scroll can cooperate with the orbiting scroll 5 of the scroll compressor. When the suction chamber formed by the outer line 82 of the fixed scroll and the inner line 81 of the orbiting scroll finishes suction, the minimum distance between the inner line 81 of the orbiting scroll and any point on the boundary line of the strip groove 4 (i.e., the minimum sealing distance 60) can be greater than or equal to the tooth thickness t7 of the fixed wrap 3. Because the suction chamber formed by the outer line 82 of the fixed scroll and the inner line 81 of the orbiting scroll forms a compression chamber 6 after suction, and the compression chamber 6 is compressed during operation of the scroll compressor, communication between the compression chamber 6 and the strip groove 4 should be avoided to prevent refrigerant in the compression chamber 6 from entering the suction chamber and causing refrigerant leakage. Similarly, when the suction chamber formed by the outer line 82 of the orbiting scroll and the inner line of the fixed scroll finishes suction, the minimum distance between the outer line of the orbiting scroll 5 and any point on the boundary line of the strip groove 4 is greater than or equal to the tooth thickness t7 of the fixed wrap 3.

[0044] Further, preferably, Figure 7 As shown, in the embodiment, the tooth thickness t7 can be the average value of the thickness of the end of the fixed scroll tooth 3 close to the suction hole 2 within the first range 9. The first range 9 can be the line connecting the midpoint of the fixed scroll body 1 and the midpoint of the first air inlet 21 of the suction hole 2, and the interval included when it is deflected from 20° (i.e., the first angle 91) to 60° (i.e., the second angle 92) in the direction close to the strip groove 4 (including 20° and 60°). In this way, when the tooth thickness of the fixed scroll tooth 3 is not equal everywhere, the average value of the tooth thickness within the first range 9 is selected as the tooth thickness t7, which can better prevent refrigerant leakage.

[0045] In addition, if Figures 1 to 7 As shown, according to a second aspect of the present invention, a scroll compressor is provided, which includes the fixed scroll plate as described above.

[0046] During use, the strip groove 4 is connected to the suction hole 2, so that the area of ​​the air intake channel of the fixed scroll disk is increased and the aerodynamic resistance of the air intake channel is reduced, thereby improving the volumetric efficiency of the scroll compressor, so that the scroll compressor can adapt to a wider range of working environments and higher performance requirements.

[0047] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A fixed scroll plate, provided in a scroll compressor, characterized in that: The fixed scroll comprises: Fixed scroll body; An air intake hole is provided on the fixed scroll body; A fixed scroll tooth, provided on a tooth bottom plate of the fixed scroll body; and The strip groove is connected to the air suction hole, and the strip groove is opened on the tooth bottom plate.

2. The fixed scroll according to claim 1, wherein: The strip groove extends in an arc shape, and the extending direction of the strip groove is the same as the extending direction of the fixed scroll gear.

3. The fixed scroll according to claim 2, wherein: The end of the strip groove is communicated with the air suction hole, and a chamfer is provided at the connection between the strip groove and the air suction hole.

4. The fixed scroll according to claim 2, wherein: The width of the strip groove gradually decreases in a direction away from the air suction hole.

5. The fixed scroll according to claim 1, wherein: The depth of the strip groove is 0.2 to 0.4 times the thickness of the tooth bottom plate.

6. The fixed scroll according to claim 1, wherein: The air intake hole comprises: a first air inlet formed on a first side surface of the fixed scroll body; and A second air inlet is communicated with the first air inlet and is formed on a second side surface of the fixed scroll body.

7. The fixed scroll according to claim 6, wherein: When the suction chamber formed by the outer line of the fixed scroll and the inner line of the moving scroll of the scroll compressor finishes suctioning, the minimum distance between the inner line of the moving scroll and any point on the boundary line of the strip groove is greater than or equal to the tooth thickness t of the fixed scroll tooth.

8. The fixed scroll according to claim 7, wherein: When the suction cavity formed by the outer line of the moving scroll and the inner line of the fixed scroll finishes suctioning, the minimum distance between the outer line of the moving scroll and any point on the boundary line of the strip groove is greater than or equal to the tooth thickness t of the fixed scroll.

9. The fixed scroll according to claim 8, wherein: The tooth thickness t is the average thickness of the fixed scroll tooth within a first range, and the first range is a line connecting the midpoint of the fixed scroll body and the midpoint of the first air inlet, and is deflected 20° to 60° in the direction close to the strip groove.

10. A scroll compressor, characterized in that: The scroll compressor includes the fixed scroll according to any one of claims 1 to 9.

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