Scroll compressor

Abstract

The utility model provides a scroll compressor. The scroll compressor comprises a static scroll plate (1) and a reed (2), the static scroll plate (1) is provided with a groove (11) and a through hole (12) used for discharging compressed gas, the groove (11) is communicated with the internal space of the static scroll plate (1) through the through hole (12), the reed (2) is provided with a reed main body (21) and a reed head (22), the reed head (22) can open and close the through hole (12), and the reed main body (21) is communicated with the reed head (22) through the through hole (12). A circumferential limiting part is arranged on the side wall of the groove (11) or the side edge of the reed (2) and used for conducting circumferential limiting on the reed (2). According to the scroll compressor, the reed can be positioned in a high-cost-performance mode, so that the size precision of the static scroll plate groove and the reed retainer does not need to be too high, and the production cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and more particularly, to scroll compressors. Background Art

[0002] This section aims to provide background information related to understanding the various technologies described herein. As implied by the title of this section, this is in no way intended to imply that the relevant technologies are necessarily prior art. Therefore, it should be understood that any statement in this section should be read from this perspective and not as any admission of prior art.

[0003] In some technical solutions known to the applicant, the reed is axially positioned by the extrusion force of the gasket and the reed retainer, and circumferentially positioned by two pins in the scroll plate groove. The extrusion force is determined by the interference amount of the gasket and the reed retainer.

[0004] In this technical solution, the dimensional accuracy of the reed retainer and the scroll plate groove needs to be very high to ensure an appropriate interference value and the corresponding force, so the corresponding production cost is also very high. Summary of the Utility Model

[0005] According to different aspects, the purpose of the present disclosure is to position the reed in a cost-effective manner, such that, for example, the dimensional accuracy of the scroll plate groove does not need to be too high, and the production cost is reduced.

[0006] In addition, the purpose of the present disclosure is to solve or at least alleviate one or more problems existing in the prior art.

[0007] The present disclosure solves the above problems by providing a scroll compressor. Specifically, according to one aspect of the present disclosure, there is provided:

[0008] A scroll compressor, wherein the scroll compressor includes a stationary scroll and a reed. The stationary scroll is provided with a groove and a through hole for discharging the compressed gas. The groove communicates with the internal space of the stationary scroll through the through hole. The reed has a reed body and a reed head, and the reed head can open and close the through hole. A circumferential limiting portion is formed on the side wall of the groove or the side of the reed for circumferentially limiting the reed. Description of the Drawings

[0009] With reference to the accompanying drawings, the above and other features of the present disclosure will become apparent, wherein,

[0010] Figure 1 shows a cross-sectional view of a scroll compressor in the reed region according to an embodiment of the present disclosure;

[0011] Figure 2Shows a top view of a scroll compressor in the reed area according to an embodiment of the present disclosure;

[0012] Figure 3 Shows a cross-sectional view of the mating relationship of a gasket, a reed retainer, and a reed of a scroll compressor according to an embodiment of the present disclosure;

[0013] Figure 4 Shows a perspective view of a scroll compressor in the gasket area according to an embodiment of the present disclosure;

[0014] Figure 5 Shows a perspective view of a gasket of a scroll compressor according to an embodiment of the present disclosure;

[0015] Figure 6 Shows a perspective view of a stationary scroll of a scroll compressor according to an embodiment of the present disclosure; and

[0016] Figure 7 Shows a plan view of a reed of a scroll compressor according to an embodiment of the present disclosure. Detailed Embodiments

[0017] It is easily understood that according to the technical solution of the present disclosure, without changing the essence of the present disclosure, those of ordinary skill in the art can propose various structural forms and implementation manners that can be mutually replaced. Therefore, the following detailed embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present disclosure, and should not be regarded as all of the present disclosure or as a limitation or restriction on the technical solution of the present disclosure.

[0018] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings, and they are relative concepts. Therefore, they may change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for descriptive and distinguishing purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components.

[0019] Refer to Figure 1 、 Figure 2 and Figure 3 , wherein, Figure 1 Shows a cross-sectional view of a scroll compressor in the reed area according to an embodiment of the present disclosure; Figure 2 Shows a top view of a scroll compressor in the reed area according to an embodiment of the present disclosure; and Figure 3 Shows a cross-sectional view of the mating relationship of a gasket, a reed retainer, and a reed of a scroll compressor according to an embodiment of the present disclosure.

[0020] The scroll compressor includes a stationary scroll 1 and a reed 2. The stationary scroll 1 is provided with a groove 11 and a through hole 12 for discharging the compressed gas. The groove 11 communicates with the internal space of the stationary scroll 1 through the through hole 12. The reed 2 has a reed body 21 and a reed head 22. The reed head 22 can open and close the through hole 12. A circumferential limiting portion is formed on the side wall of the groove 11 or the side of the reed 2 for circumferentially limiting the reed 2.

[0021] It should be understood that the working principle of a scroll compressor is to utilize the relative revolution movement of a moving scroll and a stationary scroll (or called a dynamic scroll and a static scroll) to form a continuous change in the enclosed volume, so as to achieve the purpose of compressing gas. The main shaft of the scroll compressor drives the moving scroll to move, and can form a sealed working chamber with the stationary scroll, thereby successively completing the processes of suction, compression and exhaust. Due to its advantages such as high efficiency, energy saving, low noise and high reliability, the scroll compressor can be preferably applied to application fields or occasions such as air-conditioning refrigeration, air compression, gas treatment, chemical industry, nitrogen and oxygen production, and fluid transportation.

[0022] During the exhaust process, due to the pressure difference, the reed will be pressured to open, and the compressed gas is discharged through the through hole. During the suction or compression process, the reed resets due to the back pressure and closes the through hole. In this regard, the reed can also be understood as a kind of check valve. It should also be understood that the opening and closing movement of the reed is mainly formed by the opening and closing movement of the reed head, but it does not exclude that the reed body may also have a slight opening and closing stroke.

[0023] In this technical solution, the reed head is responsible for opening and closing the through hole, and the reed body can always be located in the groove of the stationary scroll. Therefore, the reed can be set to have a lower stiffness, so as to more easily realize the switching of the opening and closing of the through hole and the expected springback performance.

[0024] By providing the circumferential limiting portion, the circumferential positioning or limiting effect of the reed is realized, ensuring the positional accuracy of the reed during the working process. There is no need to position the reed through two pin edges in the groove of the stationary scroll as in the technical solution of the background art. Therefore, the pins can be omitted, thereby simplifying the processing technology of the groove of the stationary scroll, reducing the production cost, and achieving the technical purpose of the present disclosure. In addition, this technical solution utilizes the structure of the stationary scroll itself to construct the groove and is used to accommodate the reed (at least during the non-exhaust process), so the overall compactness of the scroll compressor is maintained, and the layout space of the stationary scroll is fully utilized.

[0025] In addition, as described above, considering that the reed body does not participate or basically does not participate in the opening and closing movement of the through hole, the circumferential limiting portion can be constructed on the reed body or on the inner wall portion of the groove corresponding to the reed body, so as to ensure relatively stable circumferential limitation regardless of whether the reed is in the open, closed or intermediate position.

[0026] Regarding the specific structure of the circumferential limiting portion, exemplarily, the circumferential limiting portion includes a protruding portion 211 constructed on the side of the reed body 21, and the protruding portion 211 extends towards the side wall of the groove 11. Thus, this technical solution also defines the cooperation mode between the protruding portion of the reed body and the groove. For example, means such as a relatively small distance between the protruding portion and the groove or contact with each other are adopted to achieve the above technical effects. The protruding portion should be understood in a broad sense and can cover all protrusions such as stoppers and bosses. When necessary, it can also be set to be elastic or cover / include a spring so as to return the reed more quickly.

[0027] Those skilled in the art can flexibly select the design position of the protruding portion according to the specific shape of the reed. As will be further explained later, if the reed can be configured in the shape of a rounded rectangle, the protruding portion can be arranged on the side of the rectangular portion of the reed body, or on the side of the rounded corner of the reed body, or a combination of protruding portions at several different positions and the circumferential limiting portions on the side wall of the groove, etc., with various design forms. As previously mentioned, the scroll compressor further includes a fixedly arranged reed retainer 3, and the reed retainer 3 forms the limitation of the reed 2. Thus, it can be seen that in the exhaust working condition, the head of the reed is pressed and lifted to release the exhaust passage via the through hole, and the head of the reed will touch the head of the reed retainer to form the definition of the limit position. In addition, the main body of the reed retainer can also form a limiting effect on the reed body when necessary. Combining the circumferential positioning between the protruding portion and the groove, the fixedly arranged reed retainer can be understood as an axial positioning or limitation. In this regard, the reed retainer can also be called a reed limiter.

[0028] It can also be understood that the opening degree of the reed is defined by the shape of the reed retainer, for example, by the bending degree of the head of the reed retainer. Here, it should be noted that the shape of the reed retainer or the opening degree of the reed should be reasonably determined, neither too large nor too small. Because if the opening degree is too large, it is easy to cause the movement amplitude of the reed to be too large, thus increasing the risk of fracture; while if the opening degree is too small, it is easy to cause unexpected noise during the working process of the reed. In addition, the reed retainer, for example, its main body part can also be arranged in the groove, which can also make full use of the design space of the stationary scroll and maintain compactness, and the lifting degree of the head of the reed retainer is designed according to the design requirements of the reed opening degree. Thus, it may also be in the area of the groove or a little beyond the groove area.

[0029] Regarding the fixing method of the reed retainer, in some embodiments of the present disclosure, the scroll compressor further includes a threaded fastener 4, and the reed retainer 3 is fixed by the threaded fastener 4. The threaded fastener 4 passes through the reed retainer 3 and the reed body 21 and enters the stationary scroll 1.

[0030] Among them, threaded fasteners generally refer to parts with threads that play a fastening role, such as screws, bolts, and screws, etc. The characteristics of threaded connections include convenient disassembly and assembly, reliable fastening, long service life, large connection force, compact structure, strong interchangeability (due to the standardization of threaded connections, the threaded connections between different components can be interchanged, facilitating maintenance and replacement of parts), and cost savings. It can be seen that by using threaded fasteners to fix the reed retainer, the technical means of using a gasket to fix the reed retainer in the background art is replaced, making the extrusion force between the gasket and the reed retainer and the interference amount set therebetween optional, not mandatory. It also reduces the dimensional accuracy requirements for the reed retainer and the stationary scroll groove. The size of the reed retainer can have a larger design tolerance or range, thereby reducing the corresponding design and manufacturing costs.

[0031] In addition, it can be seen from this technical solution that the threaded fastener can also play a part in positioning the reed body, and can cooperate with the protrusion to ensure the positional accuracy of the reed during operation. Moreover, precisely because of the cooperation of these two positioning methods, the screwing torque of the threaded fastener does not need to be too large, thus protecting the stationary scroll, the reed body, and the reed retainer. In addition, similarly, since the threaded fastener finally extends into the stationary scroll, the compactness of the entire compressor can still be maintained, making full use of the space of the stationary scroll itself.

[0032] Combined with Figure 4 and Figure 5 , where Figure 4 shows a perspective view of a scroll compressor in the gasket area according to an embodiment of the present disclosure; and Figure 5 shows a perspective view of a gasket of a scroll compressor according to an embodiment of the present disclosure.

[0033] The scroll compressor further includes a gasket 5 and a cover 6, and the gasket 5 is disposed between the stationary scroll 1 and the cover 6. It should be understood that the gasket can form a sealed connection with the cover to isolate the compression chamber, prevent the compressed gas from leaking into the atmosphere, and also prevent the reed retainer from colliding with the cover. Optionally, the gasket can be configured with reinforcing ribs to enhance this sealing effect. Thus, the outer shape of the gasket can be designed to match the outer shape of the cover, and a plurality of surrounding through holes are correspondingly formed and fixedly connected to the corresponding parts of the cover by threads. In addition, the gasket can be designed to be thinner to save floor space while maintaining its original function.

[0034] From Figure 4 It can also be clearly seen that the gasket 5 is at least partially disposed on the reed retainer 3. Thus, the gasket can, to a certain extent, play a role in fixing or limiting the reed retainer, and thus can also, to a certain extent, provide an auxiliary function for the limiting of the reed. Furthermore, it can further relieve the torque of the threaded fastener or the positional accuracy of the reed retainer and / or the groove, reducing the production cost.

[0035] In some embodiments of the present disclosure, the reed retainer 3 and the gasket 5 are in interference fit, and the reed retainer 3 abuts against the reed body 21. Through this technical solution, a squeezing force can be generated between the gasket and the reed retainer, and this squeezing force can further support the axial limiting or positioning of the reed. Acting together with, for example, axially positioning the reed by a threaded fastener, the working pressure of the threaded fastener is shared. For example, the screwing torque thereof does not need to be too large, and thus the dimensional accuracy and production cost of the reed retainer and the stationary scroll groove can still be effectively controlled. It is a technical method that combines both effects and costs. Those skilled in the art should understand that the interference amount needs to be appropriately designed so that the gasket can have a certain pressure on the reed retainer. The interference amount should not be too large, otherwise there may be a risk that the gasket will push up the cover.

[0036] It should be understood that the cooperation mode between the reed retainer and the gasket can also be determined by considering the relative positional relationship between the reed retainer and the groove. For example, depending on the fit tolerance between the reed retainer and the groove, in some cases, when the reed retainer reaches the lower limit of the tolerance and sinks into the groove, it can be not in contact with the gasket and only rely on the threaded fastener for positioning. Then, the cooperation mode between the reed retainer and the gasket can be a clearance fit; in other cases, when the reed retainer is flush with the end face of the stationary scroll, or in other words, the end face of the reed retainer is aligned with the end face of the stationary scroll, the reed retainer and the gasket can be selected to have an interference fit. Thus, it should be known that these three different cooperation modes can be adaptively selected according to the criterion of whether the reed retainer extends out of the groove.

[0037] This technical solution also defines that the reed retainer abuts against the reed body. For example, the bottom surface of the reed retainer and the top surface of the reed body at least partially form a surface-to-surface fit, which can improve the axial limiting effect on the reed body, further relieve the torque of the threaded fastener, as well as the dimensional accuracy and production cost of the reed retainer and the scroll compressor recess, and can also reduce the noise generated by the possible movement of the reed body during the operation of the reed. In addition, in this way, the reed retainer can squeeze the reed into the scroll compressor recess, ensuring its installation position accuracy. In this regard, the shapes of the reed and the reed retainer can be designed to be adapted to and cooperate with each other. The following will be further explained in conjunction with Figure 7 This will also be elaborated on.

[0038] Combined with Figure 4 and Figure 5 It can also be seen that the gasket 5 is provided with an opening 51 for the threaded fastener 4 to pass through, and the opening 51 and the threaded fastener 4 are spaced apart from each other. That is to say, after the threaded fastener is screwed into the scroll compressor, it is in contact with the gasket. On the one hand, this can of course prevent the possibility of interference and damage between the threaded fastener and the gasket during the screwing process. On the other hand, there are not too many requirements for the assembly sequence, that is, the gasket can be installed first, or the threaded fastener can be installed first, and the subsequent functions of the two will not be affected. In some other embodiments, it is also possible to consider adding a gasket or making the diameter of the opening smaller so as to act as a gasket for the threaded fastener, improving the stability of the screw fixation, dispersing the pressure and buffering. Relatively speaking, the assembly sequence usually requires installing the gasket first and then the threaded fastener.

[0039] The following will refer to Figure 6 to further illustrate the structure of the recess. Among them, Figure 6 shows a perspective view of a scroll compressor's scroll of a scroll compressor according to an embodiment of the present disclosure.

[0040] The groove bottom of the groove 11 is configured with a deepening portion 111, and the deepening portion 111 is recessed in the direction of the internal space of the static scroll 1. The function of the deepening portion is to provide a buffer space for the rebound of the reed, so that the rebound of the reed is more sufficient, thereby improving the working life of the reed and the static scroll. The deepening portion is exemplarily perpendicular to the reed or extends along the longitudinal direction of the groove. If necessary, the depth, shape, number, layout position and other properties of the deepening portion can be adjusted according to actual needs. It can also be seen that the side wall of the groove 11 is configured with a concave arc portion 112, that is, the arc portion can also be understood as an arc-shaped groove. The role of the arc portion includes facilitating the development of the processing technology (such as milling) of the groove. The position of the arc portion can be aligned with the position of the deepening portion, for example, so that the cross-section of the two presents a waist-shaped hole shape as a whole. When the reed is in the closed position, the protrusion of the reed body and the arc portion have a certain spacing in the longitudinal direction so that the circumferential limiting function of the protrusion can be normally exerted. It can be understood that, depending on the specific processing technology, the shape, number, position, etc. of the arc portion can be modified, or the arc portion can be eliminated.

[0041] refer to Figure 7 , which shows a plan view of a reed of a scroll compressor according to an embodiment of the present disclosure.

[0042] The reed 2 is in the shape of a rounded rectangle, the threaded fastener 4 is arranged at one rounded end of the reed body 21 , and the two protrusions 211 are configured in an arc shape and are symmetrically arranged.

[0043] The rounded rectangle here should be understood in a broad sense, including not only the case of a rectangle with rounded chamfers, but also a shape with a rectangle in the middle and arc-shaped at both ends, similar to the shape of a waist-shaped hole. The shape of the reed retainer can also be designed similarly. This design form can better match the shape of the groove and the through hole, and is also adapted to the cross-sectional shape of the screw of the threaded fastener, for example. To this end, the technical solution also stipulates the position layout of the threaded fastener so that it does not affect the opening and closing movement of the reed as much as possible, and can achieve the axial and circumferential limiting or positioning of the reed together with the protrusion, the reed retainer, and the sealing gasket. Similarly, the symmetry of the protrusion can be understood to mean axial symmetry relative to the longitudinal direction of the reed, and circumferential positioning can be achieved in two directions, ensuring that the position accuracy is within a certain range. At the same time, the arc design is also friendly to the side wall of the groove, and will not cause excessive damage to the side wall during operation. If necessary, more protrusions can also be designed and their shape, position or orientation can be adjusted according to actual requirements.

[0044] It should be understood that all of the above preferred embodiments are exemplary rather than restrictive, and all modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present disclosure should fall within the legal protection scope of the present disclosure.

Claims

1. A scroll compressor, characterized in that: The scroll compressor comprises a fixed scroll (1) and a reed (2); the fixed scroll (1) is provided with a groove (11) and a through hole (12) for discharging compressed gas; the groove (11) is connected to the internal space of the fixed scroll (1) via the through hole (12); the reed (2) has a reed body (21) and a reed head (22); the reed head (22) is capable of opening and closing the through hole (12); a side wall of the groove (11) or a side edge of the reed (2) is provided with a circumferential limiting portion for circumferentially limiting the reed (2).

2. The scroll compressor according to claim 1, characterized in that: The circumferential limiting portion comprises a protrusion (211) constructed on the side of the leaf spring body (21), and the protrusion (211) extends toward the side wall of the groove (11).

3. The scroll compressor according to claim 2, characterized in that: The scroll compressor further comprises a fixedly arranged reed retainer (3), wherein the reed retainer (3) forms a limit for the reed (2).

4. The scroll compressor according to claim 3, characterized in that: The scroll compressor further comprises a threaded fastener (4), the reed retainer (3) being fixed by the threaded fastener (4), and the threaded fastener (4) passing through the reed retainer (3) and the reed body (21) and entering into the fixed scroll (1).

5. The scroll compressor according to claim 4, characterized in that: The scroll compressor further comprises a sealing gasket (5) and a cover body (6), wherein the sealing gasket (5) is arranged between the fixed scroll (1) and the cover body (6).

6. The scroll compressor according to claim 5, characterized in that: The sealing gasket (5) is at least partially arranged on the reed holder (3).

7. The scroll compressor according to claim 1, characterized in that: The groove bottom of the groove (11) is configured with a deepening portion (111), and the deepening portion (111) is recessed toward the inner space of the fixed scroll (1).

8. The scroll compressor according to claim 1, characterized in that: The side wall of the groove (11) is configured with a concave arc portion (112).

9. The scroll compressor according to claim 6, characterized in that: The reed retainer (3) and the sealing gasket (5) are interference-fitted, and the reed retainer (3) abuts against the reed body (21).

10. The scroll compressor according to claim 4, characterized in that: The reed leaf (2) is in the shape of a rounded rectangle, the threaded fastener (4) is arranged at one rounded end of the reed leaf body (21), and the two protrusions (211) are configured in an arc shape and are symmetrically arranged.

11. The scroll compressor according to claim 5, characterized in that: The sealing gasket (5) is provided with an opening (51) for the threaded fastener (4) to pass through, and the opening (51) and the threaded fastener (4) are spaced apart from each other.

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