Exhaust mechanism for reducing exhaust noise of scroll compressor

Abstract

The invention discloses an exhaust mechanism for reducing exhaust noise of a scroll compressor, and relates to the technical field of compressors. Comprising a valve seat, an exhaust valve plate and a limiter, the valve seat is integrally formed on the static vortex, and the exhaust valve plate is installed on the valve seat; the limiting stopper is connected with the valve seat through a bolt, the exhaust valve plate is packaged between the limiting stopper and the valve seat, and the moving distance of the valve body in the vertical direction is limited. The through holes are formed in the inner wall of the limiter, so that the pressure difference between the upper surface and the lower surface of the exhaust valve plate is reduced, the impact force of the exhaust valve plate during up-down movement is relieved, the impact and exhaust noise of the exhaust valve plate can be effectively reduced, and therefore the durability of the exhaust valve plate and the reliability of the whole scroll compressor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly relates to an exhaust mechanism for reducing the exhaust noise of a scroll compressor. Background Art

[0002] Due to characteristics such as compact structure and stable operation, the application range of scroll compressors is continuously expanding. Under normal operating conditions, there is no need to set an exhaust valve because of its continuous exhaust characteristics, and the noise control is good. However, under special operating conditions, when the refrigerant circulation rate suddenly decreases, resulting in a sharp increase in the pressure difference inside and outside the compression chamber, an exhaust valve needs to be activated to prevent refrigerant backflow. At this time, the exhaust valve opens and closes frequently at high frequency and collides violently with the limiter and the valve seat, generating significant noise and seriously affecting the acoustic performance of the equipment.

[0003] In order to reduce the noise generated by the exhaust mechanism, the utility model patent CN208503022U coats the upper and lower surfaces of the exhaust valve, the contact area between the valve seat and the valve plate, and the contact area between the limiter and the valve plate with an engineering plastic coating or an engineering plastic-based composite coating, thereby reducing the noise generated by the vibration of the valve plate. Although coating the buffer coating in the contact area can reduce noise, the reliability and durability of its coating need to be further verified. The exhaust valve disclosed in the invention patent CN115013565A has three small through holes opened at the top of the limiter. The exhaust valve is changed to an annular structure with legs, and there is a corresponding annular oil groove on the valve seat. This structure can improve the noise generated by the slapping of the exhaust valve with the limiter and the valve seat. However, the microporous structure of this exhaust mechanism is prone to blockage, and the exhaust valve structure is complex, with a large processing difficulty. Therefore, the current exhaust valve design faces the technical dilemma that it is difficult to synergistically optimize noise reduction, energy efficiency, and reliability. Summary of the Invention

[0004] The purpose of the present invention is to provide an exhaust mechanism for reducing the exhaust noise of a scroll compressor, which can synergistically control mechanical impact noise and pneumatic noise, while taking into account the characteristics of efficient check valve and low flow resistance.

[0005] To achieve the above purpose, the technical solution of the present application is: an exhaust mechanism for reducing the exhaust noise of a scroll compressor, including a limiter, an exhaust valve plate, and a valve seat;

[0006] The limiter is provided with a limiting groove body on it;

[0007] The exhaust valve plate is encapsulated between the limiter and the valve seat and placed in the limiting groove body, restricting the vertical movement distance of the exhaust valve plate;

[0008] The valve seat is integrally formed on the stationary scroll.

[0009] As a preferred solution of the present invention, the limiter is connected to the valve seat through bolts on both sides.

[0010] As a preferred embodiment of the present invention, the limiter is designed with an integrated structure, specifically including: an upper end plate and columnar legs symmetrically arranged on both sides thereof; wherein, a limiter through-hole is provided at the center of the upper end plate; multiple groups of arc-shaped through-holes or rectangular through-holes are symmetrically formed on the inner walls of the two columnar legs, and bolt through-holes are respectively configured, and the lower end surfaces of each columnar leg are smoothed.

[0011] As a preferred embodiment of the present invention, the exhaust valve disc adopts an integral circular sheet structure, and the upper surface, lower surface and outer circumferential wall surface of the exhaust valve disc are all smoothed.

[0012] As a preferred embodiment of the present invention, the valve seat is designed with a stepped structure, specifically including:

[0013] An exhaust hole communicating with the static scroll compression chamber is machined at the axis of the valve seat;

[0014] Assembly holes are symmetrically arranged on both sides of the valve seat, which are aligned with the bolt through-holes for assembling the limiter.

[0015] As a preferred embodiment of the present invention, the upper end surface of the valve seat is smoothed for smooth fitting with the lower end surface of the columnar leg of the limiter and the lower surface of the exhaust valve disc.

[0016] As a preferred embodiment of the present invention, the diameter of the upper side wall of the valve seat is slightly smaller than that of the lower side wall, and the upper side wall is used for installing a sealing ring.

[0017] As a preferred embodiment of the present invention, the through-hole of the upper end plate is concentrically arranged with the exhaust hole.

[0018] As a preferred embodiment of the present invention, the arc-shaped inner surface between adjacent arc-shaped through-holes or rectangular through-holes is smoothed, and the size of the arc-shaped inner surface matches the size of the exhaust valve disc, and the two are in clearance fit.

[0019] As a preferred embodiment of the present invention, when high-pressure gas is discharged from the exhaust hole of the valve seat, part of the gas flow is guided to the upper surface of the exhaust valve disc through the arc-shaped through-holes or rectangular through-holes of the limiter, reducing the pressure difference between the upper and lower surfaces of the exhaust valve disc, and effectively reducing the impact force of the exhaust valve disc on the limiter.

[0020] Due to the adoption of the above technical solutions, the present invention can achieve the following technical effects:

[0021] 1. Multiple groups of arc-shaped through-holes are provided on the inner walls of the columnar legs of the limiter in the present invention. The high-pressure gas discharged from the exhaust hole will flow through the arc-shaped through-holes to reach the upper surface of the exhaust valve disc, forming a buffer air cushion between the exhaust valve disc and the limiter. At the same time, the pressure difference between the upper and lower surfaces of the exhaust valve disc is reduced, slowing down the impact of the exhaust valve on the limiter.

[0022] 2. A through hole is provided at the upper end plate of the limiter of the present invention, forming a buffer air cushion during the opening stage of the exhaust valve disc, reducing the impact on the limiter after the high-speed opening of the exhaust valve disc. At the same time, after the exhaust is completed, the external high-pressure refrigerant will flow into the limiter cavity through this through hole, accelerating the fall of the exhaust valve disc and ensuring excellent sealing of the exhaust valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a three-dimensional exploded view of the exhaust mechanism of the present invention;

[0025] Figure 2 is a cross-sectional view of the limiter of the present invention;

[0026] Figure 3 is a bottom view of the limiter of the present invention;

[0027] Figure 4 is a cross-sectional view of the exhaust valve disc of the present invention;

[0028] Figure 5 is a cross-sectional view of the valve seat of the present invention;

[0029] Figure 6 is a top view of the limiter in Embodiment 2 of the present invention;

[0030] Explanation of the reference numerals in the figures: 1, limiter; 101 upper end plate; 102 columnar leg; 103 limiter through hole; 104 bolt through hole; 105 arc through hole; 106 lower end face of the columnar leg; 107 arc inner surface; 108 rectangular through hole; 2, exhaust valve disc; 201 upper surface of the exhaust valve disc; 202 lower surface of the exhaust valve disc; 203 outer circumferential wall surface of the exhaust valve disc; 3, valve seat; 301 exhaust hole; 302 upper end face of the valve seat; 303 upper side wall of the valve seat; 304 assembly hole; 305 lower side wall of the valve seat; 4, bolt; 5, static scroll. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention. The orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0035] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above or over other devices or structures" will then be positioned "below or under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0036] It should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] As Figure 1 shown, this embodiment provides an exhaust mechanism for reducing the exhaust noise of a scroll compressor, including a stopper 1, an exhaust valve plate 2, and a valve seat 3; the valve seat 3 is integrally formed on the stationary scroll 5; the exhaust valve plate 2 is mounted on the valve seat 3; the stopper 1 is connected to the valve seat 3 through a bolt 4, and the exhaust valve plate 2 is encapsulated between the stopper 1 and the valve seat 3 to limit the moving distance of the exhaust valve plate in the vertical direction.

[0039] As Figures 2 - 3As shown in the figure, the stopper 1 is integrally processed from an upper end plate 101 and columnar legs 102; the columnar legs 102 are symmetrically arranged on both sides of the upper end plate 101; a stopper through-hole 103 is provided at the center of the upper end plate 101, and its diameter is preferably 4 - 6 mm, and high-pressure gas is discharged and enters through this stopper through-hole; the stopper through-hole 103 is concentric with the exhaust hole 303; an arc-shaped through-hole 105 is provided on the inner wall 107 of each columnar leg 102, and each group of arc-shaped through-holes 105 is symmetrically arranged. The radius of the arc-shaped through-hole 105 is preferably 0.5 - 2.5 mm. The inner arc surface between adjacent arc-shaped through-holes is smooth, and the size of the inner arc surface matches the size of the exhaust valve plate, and the two are in clearance fit. Bolt through-holes 104 are respectively provided on the columnar legs 102, and the lower end surfaces 106 of each columnar leg 102 are all smooth. The height at which the stopper 1 is provided is determined by the height of the two columnar legs 102, and is set according to the principle of sufficient exhaust, and the minimum valve gap is selected without increasing the exhaust resistance of the compressor. The stopper 1 has a guiding function for the exhaust valve plate 2, inhibits the eccentricity and vibration during the operation of the exhaust valve plate, and enables the exhaust valve plate to run smoothly during the stroke.

[0040] As Figure 4 shown, the exhaust valve plate 2 is a circular sheet structure; the upper surface 201 of the exhaust valve plate, the lower surface 202 of the exhaust valve plate, and the outer circumferential wall surface 203 of the exhaust valve are all smooth, with good flatness, which can ensure fitting with the upper surface of the valve seat 3.

[0041] As Figure 5 shown, the valve seat 3 is a circular columnar structure, and its bottom is integrally processed with the stationary scroll 5; an exhaust hole 301 communicating with the compression chamber of the stationary scroll 5 is processed at the axis of the valve seat 3; two assembly holes 304 corresponding to the bolt through-holes 104 are provided outside the exhaust hole 301 for assembling the stopper 1; the diameter of the upper side wall 303 of the valve seat 3 is slightly smaller than that of the lower side wall 305, and the upper side wall 303 is used for installing a sealing ring; the upper end surface 302 of the valve seat 3 is smooth for smooth fitting with the lower end surface 106 of the columnar leg of the stopper and the lower surface 202 of the exhaust valve plate.

[0042] Embodiment 2

[0043] As Figure 6 shown, the present invention also provides an exhaust mechanism for reducing the exhaust noise of a scroll compressor, including: a stopper 1, an exhaust valve plate 2, and a valve seat 3;

[0044] The limiter 1 is integrally processed from an upper end plate 101 and columnar legs 102; the columnar legs 102 are symmetrically arranged on both sides of the upper end plate 101; a limiter through-hole 103 is provided at the center of the upper end plate 101, and its diameter is preferably 4-6 mm, through which high-pressure gas is discharged and enters; the limiter through-hole 103 is concentric with the exhaust hole 303; each inner wall 107 of the columnar leg 102 is provided with a rectangular through-hole 108, and each group of rectangular through-holes 108 is symmetrically distributed. The width of the arc through-hole 105 is preferably 2.5-4.5 mm, and the adjacent arc inner surfaces are smooth. The size of the arc inner surface matches the size of the exhaust valve plate, and the two are in clearance fit. Bolt through-holes 104 are respectively provided on the columnar legs 102, and the lower end surfaces 106 of each columnar leg 102 are smooth.

[0045] The exhaust valve plate 2 is a circular sheet structure; the upper surface 201, the lower surface 202 of the exhaust valve plate, and the outer circumferential wall surface 203 of the exhaust valve are all smooth, with good flatness, which can ensure close fit with the upper surface of the valve seat 3.

[0046] The valve seat 3 is a circular columnar structure, and its bottom is integrally processed with the static scroll 5; an exhaust hole 301 communicating with the compression chamber of the static scroll 5 is processed at the axis of the valve seat 3; two assembly holes 304 corresponding to the bolt through-holes 104 are provided outside the exhaust hole 301 for assembling the limiter 1; the diameter of the upper side wall 303 of the valve seat 3 is slightly smaller than that of the lower side wall 305, and the upper side wall 303 is used for installing a sealing ring; the upper end surface 302 of the valve seat 3 is smooth for smooth fitting with the lower end surface 106 of the columnar leg of the limiter and the lower surface 202 of the exhaust valve plate.

[0047] During the operation of the exhaust valve, the high-pressure gas at the exhaust hole flows through the rectangular through-hole 108 to the upper part of the exhaust valve plate, forming a buffer air cushion between the limiter and the exhaust valve plate, which can avoid the repeated impact of the exhaust valve plate and the limiter, improve the reliability of the exhaust valve plate, and effectively avoid abnormal noise generated by the impact.

[0048] The effect of this embodiment is that the technical solution of the present invention solves the problems in the prior art, such as the large noise generated by the exhaust valve plate hitting the limiter, the easy damage of the exhaust valve plate, the complex shape of the exhaust valve plate, and the large processing difficulty.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. An exhaust mechanism for reducing the exhaust noise of a scroll compressor, comprising a stopper, an exhaust valve plate, and a valve seat; characterized in that: The limiter has a limit groove formed thereon; The exhaust valve plate is encapsulated between the stopper and the valve seat and is placed in the limit groove body to limit the vertical movement distance of the exhaust valve plate; The valve seat is integrally formed on the static scroll.

2. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 1, characterized in that: The limiter is connected to the valve seat via bolts on both sides.

3. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 1, characterized in that: The limiter adopts an integrated structural design, specifically including: an upper end plate and columnar legs symmetrically arranged on both sides thereof; wherein a limiter through hole is provided in the center of the upper end plate; a plurality of groups of arc through holes or rectangular through holes are symmetrically opened on the inner walls of the two columnar legs, and bolt through holes are respectively arranged, and the lower end surface of each columnar leg is smoothed.

4. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 1, characterized in that: The exhaust valve plate adopts an integral circular plate structure, and the upper surface, the lower surface and the outer circumferential wall surface of the exhaust valve plate are all smoothed.

5. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 1, characterized in that: The valve seat adopts a stepped structure design, specifically including: An exhaust hole connected to the static scroll compression chamber is processed at the center of the valve seat; Assembly holes are symmetrically arranged on both sides of the valve seat, which are aligned with the bolt through holes and are used to assemble the limiter.

6. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 1, characterized in that: The upper end surface of the valve seat is smoothed so as to be smoothly fitted with the lower end surface of the columnar leg of the limiter and the lower surface of the exhaust valve plate.

7. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 1, characterized in that: The diameter of the upper side wall of the valve seat is slightly smaller than the diameter of the lower side wall, and the upper side wall is used for installing a sealing ring.

8. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 5, characterized in that: The through hole of the upper end plate is arranged concentrically with the exhaust hole.

9. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 3, characterized in that: There is a smooth arc-shaped inner surface between adjacent arc-shaped through holes or rectangular through holes, the size of the arc-shaped inner surface matches the size of the exhaust valve plate, and the two are clearance-matched.

10. The exhaust mechanism for reducing the exhaust noise of a scroll compressor according to claim 3, characterized in that: When high-pressure gas is discharged from the exhaust hole of the valve seat, part of the gas flow is guided to the upper surface of the exhaust valve plate through the arc-shaped through hole or the rectangular through hole of the limiter, so that the pressure difference between the upper and lower surfaces of the exhaust valve plate is reduced.

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