CN110905803B

CN110905803B - Check valve and scroll compressor

Info

Publication number: CN110905803B
Application number: CN201811074864.2A
Authority: CN
Inventors: 吴凌云; 盛刚; 陈新虹
Original assignee: Gulun Environmental Technology Suzhou Co ltd
Current assignee: Gulun Environmental Technology Suzhou Co ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2024-08-13
Anticipated expiration: 2038-09-14
Also published as: CN110905803A

Abstract

The present disclosure provides a check valve and a scroll compressor, wherein the check valve includes: a valve seat having a valve hole formed therein for passage of a fluid; a valve plate disposed above the valve seat and configured to selectively open or close the valve hole; a valve stopper disposed above the valve sheet and fixedly connected to the valve seat, the valve stopper including a stopper portion limiting a maximum displacement range of the valve sheet and a guide portion for guiding movement of the valve sheet; and a flow guide configured to guide the fluid flowing through the check valve, thereby controlling a force applied to the valve sheet by the fluid. The one-way valve controls the flow direction of fluid by using the flow guide piece, thereby achieving the purposes of reducing working noise and stop noise of the scroll compressor and improving the efficiency and the working reliability of the scroll compressor.

Description

Check valve and scroll compressor

Technical Field

The present disclosure relates to a check valve and a scroll compressor including the same.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

In the field of scroll compressors, a check valve is usually installed in the scroll compressor in order to prevent the scroll compressor from reversing when the scroll compressor is stopped. Such a check valve includes a valve seat formed with a valve hole, a valve plate capable of opening or closing the valve hole, and a valve stopper restricting a displacement range of the valve plate and guiding movement of the valve plate. When the scroll compressor is operated, fluid discharged from a valve seat below the valve plate acts on the valve plate to move it upward, thereby opening the valve orifice to allow fluid flow through the check valve. When the scroll compressor is stopped, the valve plate is moved downward by the pressure of the return fluid to close the valve hole, thereby preventing the return of the fluid.

However, in some cases, the valve plate may be subject to the adhesion of the lubricating oil or insufficient pressure difference across the valve plate at the time of shutdown of the scroll compressor and may not be able to quickly close the valve hole downward, thereby generating shutdown reverse noise and risking wear and part damage; further, when the scroll compressor is operated, the valve plate may not be stably maintained in an upper open position, thereby generating operation noise and affecting the reliability of the scroll compressor.

Accordingly, there is a need for a one-way valve structure that at least partially addresses the above-described problems.

Disclosure of Invention

It is an object of one or more embodiments of the present disclosure to provide a check valve capable of reducing operational noise of a scroll compressor and improving reliability.

It is another object of one or more embodiments of the present disclosure to provide a check valve that has a shorter response time, prevents backflow of fluid, and reduces scroll compressor noise.

It is another object of one or more embodiments of the present disclosure to provide a check valve capable of preventing excessive pressure drop loss from being generated to reduce the operating efficiency of a scroll compressor while reducing noise and preventing backflow.

It is a further object of one or more embodiments of the present disclosure to provide a one-way valve with improved stability and reliability.

To achieve one or more of the above objects, according to one aspect of the present disclosure, the check valve includes: a valve seat having a valve hole formed therein for passage of a fluid; a valve plate disposed above the valve seat and configured to selectively open or close the valve hole; a valve stopper disposed above the valve sheet and fixedly connected to the valve seat, the valve stopper including a stopper portion limiting a maximum displacement range of the valve sheet and a guide portion for guiding movement of the valve sheet; and a flow guide configured to guide fluid flowing through the check valve, thereby controlling a force applied to the valve sheet by the fluid.

According to one aspect of the disclosure, the deflector is configured to surround the stopper outside the stopper, and the deflector extends in a vertical direction at least between the valve seat and the stopper.

According to one aspect of the present disclosure, the baffle is configured as a hollow cylinder structure.

According to one aspect of the disclosure, the deflector extends vertically upward from a first end to a second end, wherein the first end is vertically flush with or below an upper surface of the valve seat and the second end is vertically flush with or above the stop.

According to one aspect of the present disclosure, the flow guide is fixed to the outer circumferential surface of the valve seat by interference fit, or the flow guide is formed as one piece with the valve seat.

According to one aspect of the disclosure, the deflector extends vertically downward from a first end to a second end, wherein the first end is vertically flush with or above the stop and the second end is vertically flush with or below an upper surface of the valve seat.

According to one aspect of the present disclosure, the deflector is formed as one piece with the valve stop or the deflector is fixed to the outer circumferential surface of the valve stop by interference fit.

According to one aspect of the present disclosure, a gap is formed between the flow guide and the stopper to allow fluid to flow therethrough.

According to one aspect of the disclosure, the guide is inserted through a central hole of the valve plate and fixedly connected in the valve seat, the valve plate being movable along the guide.

According to another aspect of the present disclosure, there is provided a scroll compressor having the above-described check valve.

According to yet another aspect of the present disclosure, there is provided a scroll compressor comprising a partition separating the scroll compressor into a suction side and a discharge side, the partition having an opening in fluid communication with a discharge port of a scroll compression mechanism of the scroll compressor, and the scroll compressor being provided with a one-way valve at the opening, the one-way valve comprising: a valve seat having a valve hole formed therein for passage of a fluid; a valve plate disposed above the valve seat and configured to selectively open or close the valve hole; a valve stopper disposed above the valve sheet and fixedly connected to the valve seat, the valve stopper including a stopper portion limiting a maximum displacement range of the valve sheet and a guide portion for guiding movement of the valve sheet; and a flow guide fixed to the partition, the flow guide configured to guide a fluid flowing through the check valve, thereby controlling a force applied to the valve sheet by the fluid.

According to yet another aspect of the present disclosure, a gap is formed between the deflector and the valve seat.

With the one-way valve according to the present disclosure, due to the arrangement of the flow guide, the direction of the fluid flowing through the one-way valve can be guided such that the fluid at least partially exerts a corresponding force on the valve plate in a desired direction, thereby stably holding the valve plate in an upward open position when the scroll compressor is running and rapidly moving the valve plate downward to a closed position when the scroll compressor is shut down. Thus, the purposes of reducing working noise and stop noise and improving efficiency and working reliability of the scroll compressor are achieved. In addition, by providing a gap between the guide and the valve block, which allows the fluid to flow therethrough, the flow area of the fluid can be increased, and thus, the working efficiency of the scroll compressor can be reduced by avoiding excessive pressure drop loss while reducing noise and preventing backflow of the fluid.

Drawings

Features and advantages of one or more embodiments of the present disclosure will become more readily apparent from the following description with reference to the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way, the drawings are not to scale, and some features may be exaggerated or reduced to show details of particular components. In the drawings:

Fig. 1 schematically shows an exploded perspective view of a check valve according to a comparative example;

FIG. 2 schematically illustrates a cross-sectional view of a scroll compressor to which the check valve illustrated in FIG. 1 is applied;

FIG. 3 schematically illustrates a return path of fluid in a scroll compressor having the check valve of FIG. 1 applied thereto;

fig. 4 schematically illustrates an exploded perspective view of a one-way valve according to a first embodiment of the present disclosure;

FIG. 5 schematically illustrates a partial cross-sectional view of a scroll compressor to which a one-way valve according to a first embodiment of the present disclosure is applied;

FIG. 6 schematically illustrates a partial cross-sectional view of a scroll compressor having a check valve applied thereto in accordance with a second embodiment of the present disclosure;

FIG. 7 schematically illustrates a partial cross-sectional view of a scroll compressor to which a check valve according to a third embodiment of the present disclosure is applied;

Fig. 8 schematically illustrates a perspective view of an integrated piece of a check valve formed of a flow guide and a valve seat according to a third embodiment of the present disclosure;

FIG. 9 schematically illustrates a partial cross-sectional view of a scroll compressor to which a check valve according to a fourth embodiment of the present disclosure is applied;

Fig. 10 (a) and 10 (b) schematically show perspective views of an integrated piece of a baffle and a deflector of a check valve according to a fourth embodiment of the present disclosure; and

Fig. 11 (a) - (d) show pressure changes over time on both sides of a valve plate of a check valve structure of a comparative example as shown in fig. 1 and a check valve structure provided with a flow guide according to the present disclosure when a scroll compressor operating under different conditions is stopped.

Detailed Description

The following description of the embodiments of the disclosure is merely exemplary in nature and is in no way intended to limit the disclosure, its application, or uses. The same reference numerals are used to denote the same parts throughout the various drawings, and thus the construction of the same parts will not be repeated.

Further, in the following description, the structure of the check valve according to the present disclosure will be described taking an application of the check valve in a scroll compressor as an example. However, it is understood that the check valve structure according to the present disclosure is not limited in application to scroll compressors, and may be used in any suitable application.

A check valve 100 according to a comparative example will be described below with reference to fig. 1-3, wherein fig. 1 schematically shows an exploded perspective view of the check valve 100 according to the comparative example; FIG. 2 schematically illustrates a cross-sectional view of a scroll compressor to which the check valve 100 illustrated in FIG. 1 is applied; and figure 3 schematically illustrates the return path of fluid in a scroll compressor employing a one-way valve as shown in figure 1.

As shown in fig. 2, the scroll compressor 10 includes a generally closed housing 20. The housing 20 may be formed of a generally cylindrical body portion 22, a top cover 24 disposed at one end of the body portion 22, and a bottom cover 26 disposed at the other end of the body portion 22. A spacer 30 is provided between the top cover 24 and the body portion 22. The spacer 30 is typically secured to the top cover 24 and the body portion 22 by welding, although other suitable securing means are contemplated by those skilled in the art. The partition plate 30 partitions the interior space of the housing 20 into an intake side and an exhaust side, wherein the space between the partition plate 30 and the top cover 24 forms the exhaust side and the space between the partition plate 30 and the bottom cover 26 forms the intake side. An exhaust port 34 for discharging the compressed fluid is formed on the exhaust side. A scroll compression mechanism including a fixed scroll member 40 and an orbiting scroll member 50 is provided below the partition plate 30.

The check valve 100 may be disposed at the opening 32 of the partition 30. The opening 32 of the partition 30 is in fluid communication with the discharge port of the non-orbiting scroll member 40, thereby allowing compressed fluid to flow from the discharge port of the scroll compression mechanism toward the discharge port 34 of the scroll compressor via the one-way valve 100 disposed at the opening 32.

Fig. 1 shows a schematic structural view of a check valve 100 according to a comparative example. As shown in fig. 1, check valve 100 may include a valve seat 110, a valve plate 120, and a valve stop 130. Valve seat 110 may be secured to diaphragm 30 in any suitable manner, such as by welding, threading, etc., preferably valve seat 110 may be secured to diaphragm 30 by an interference fit for ease of installation and removal. Valve seat 110 may include a generally annular outer wall 112 and an inner wall 114, with a number of partitions 113 connected between outer wall 112 and inner wall 114. A valve hole 116 allowing fluid to flow therethrough may be formed between the adjacent partition 113 and the outer wall 112. The annular inner wall 114 may define a central aperture 118. Valve seat 110 may optionally include a bottom flange 117, and bottom flange 117 may be engaged with diaphragm 30 such that valve seat 110 is securely engaged on diaphragm 30. Valve seat 110 may have a valve stop 130 attached to central bore 118. The valve stop 130 may include a stop 134 and a guide 136. The stopper 134 may be formed with a flange extending circumferentially around the guide 136, and the stopper 134 may have a through hole 135 formed therein to allow fluid to flow therethrough. Guide 136 may extend downwardly from a lower surface of stop 134, and guide 136 may be secured in central bore 118 of valve seat 110, such as by a threaded connection. The guide 136 may be used to enable the valve plate 120 to move up and down therealong to selectively close or open the valve bore 116, thereby allowing or preventing fluid from passing through the valve bore 116. Valve plate 120 may be formed as an annular piece having a central bore 125, wherein guide 136 may be inserted through central bore 125 into central bore 118 of valve seat 110. The diameter of the central hole 125 may be slightly larger than that of the guide 136, so that a gap may be formed between the valve sheet 120 and the guide 136, so that the valve sheet 120 can slide along the guide 136. The maximum displacement range of valve plate 120 is limited by stop 134 above guide 136.

Referring to fig. 2, when the scroll compressor is operated, fluid compressed from the scroll compression mechanism flows upward through the valve hole 116 of the check valve 100 and acts on the valve plate 120 to displace the valve plate 120 upward, thereby opening the valve hole 116 so that the fluid can be discharged through the check valve 100 toward the discharge port 34. When the scroll compressor is stopped, fluid flows back to the check valve 100 through the discharge port 34, and the valve plate 120 moves downward due to its own weight and the pressure of the return fluid, thereby closing the valve hole 116 to prevent the fluid from flowing back to the suction side.

However, since the discharge fluid of the scroll compressor is generally mixed with a portion of the lubricating oil, which flows through the check valve 100 and may adhere to the check valve 100, when the scroll compressor is stopped, the valve sheet 120 is subjected to the adhesion force of the lubricating oil such that the time to fall to the valve seat 110 is prolonged. In particular, in the case of using a high viscosity lubricating oil, the falling time of the valve sheet 120 will be prolonged longer. In addition, at lower mass flow rates, the force of the fluid against valve plate 120 may be less than sufficient to cause valve plate 120 to drop rapidly, thereby failing check valve 100 to close valve orifice 116 immediately in response to a scroll compressor shutdown. In these circumstances, as indicated by arrow a in fig. 3, fluid may flow horizontally under the valve plate 120 and back through the valve opening 116 to the scroll compression mechanism, which further increases the time the valve plate 120 takes to shut down in response to the scroll compressor, as the fluid under the valve plate 120 may create some lift to the valve plate 120, thereby creating a relatively noticeable noise, exacerbating the noise level of the scroll compressor, and high velocity gas back flow, resulting in high-speed reverse rotation of the compressor, at which high-speed reverse rotation the compressor internals are vulnerable. On the other hand, during operation of the scroll compressor, the force of the fluid against valve plate 120 may be insufficient to hold valve plate 120 firmly in an open position away from valve seat 110, thereby sloshing valve plate 120, creating operational noise and reducing the operational reliability of the scroll compressor, especially in low frequency variable speed scroll compressors or at lower mass flow rates.

In order to solve the above-mentioned problems, the present inventors have conceived an improved check valve structure including a flow guide member so that the flow guide member can guide and control the flow direction of the fluid during the flow of the fluid through the check valve, so that the fluid at least partially exerts a force on the valve plate in a desired direction, thereby shortening the response time of the check valve. Therefore, the purposes of reducing noise and improving the efficiency and the working reliability of the scroll compressor are achieved.

The structure of the check valve according to the present disclosure will be described in further detail with reference to fig. 4 to 10.

Fig. 4 schematically illustrates an exploded perspective view of a one-way valve 200 according to a first embodiment of the present disclosure. Fig. 5 schematically illustrates a partial cross-sectional view of a scroll compressor to which a check valve 200 according to a first embodiment of the present disclosure is applied. As shown in fig. 4, a check valve 200 according to one embodiment of the present disclosure may include a valve seat 210, a valve plate 220, and a valve stop 230. The structures of the valve seat 210, the valve plate 220, and the valve stopper 230 according to the present embodiment may be similar to those of the corresponding components of the check valve 100 shown in fig. 1, and will not be repeated herein.

Unlike the structure of the check valve 100 shown in fig. 1, the check valve 200 of the embodiment shown in fig. 4 may include a deflector 240 disposed around the valve seat 210. In the embodiment shown in fig. 5, the baffle 240 is secured to the valve seat 210 by an interference fit, although any other suitable securing means, such as threaded connection, welding, etc., may be used. The deflector 240 may be formed in a cylindrical shape surrounding the valve seat 210. Of course, the baffle 240 may not be limited to the shape shown, but may be in any suitable other shape, such as an oval cylinder, a rectangular cylinder, a triangular cylinder, and the like. When the scroll compressor is operated, the compressed fluid discharged from the valve hole 216 can be concentrated on the region of the valve plate 220 due to the restriction of the guide 240, thereby increasing the lift force applied to the valve plate 220, shortening the response time of the check valve 200, and firmly maintaining the valve plate 220 at the open position far from the valve seat 210, so as to reduce the operation noise and improve the operation reliability of the scroll compressor.

As shown in fig. 5, the baffle 240 may extend vertically upward from the first end 242 to the second end 244. Here, the first end 242 is exemplarily shown as being disposed below the upper surface of the valve seat 210 and on the diaphragm 30, but the present disclosure is not limited thereto, and the first end 242 may be disposed at other positions below the upper surface of the valve seat 210. The second end 244 of the deflector 240 may be disposed flush with the lower surface of the stop 234 of the valve stop 230. More preferably, as shown in fig. 5, the second end 244 of the baffle 240 may be disposed flush with the upper surface of the stopper 234, or the second end 244 may be disposed above the upper surface of the stopper 234, in which case when the scroll compressor is shut down, the return fluid from the discharge port 34 is directed by the baffle 240 to flow above the stopper 234 and then downward through the through hole 235 of the stopper 234, as shown by arrow B in fig. 5, so that the fluid applies downward pressure to the valve plate 220. Thereby enabling the valve plate 220 to be rapidly moved down to the valve seat 210 to close the valve hole 216, thereby achieving the purpose of reducing noise and improving the working efficiency of the scroll compressor. Although the valve plate 220 is shown in fig. 5 as substantially corresponding to the size of the stop 234 of the valve stop 230, it will be appreciated by those skilled in the art that the stop 234 may also be formed to be larger or smaller than the size of the valve plate 220. In the case that the size of the stopper 234 is smaller than that of the valve plate 220, the return fluid may directly act on the valve plate 220 without passing through the through hole 235 on the outer edge of the valve plate 220.

Preferably, a gap may be provided between the baffle 240 and the stopper 234, so that the compressed fluid may be discharged through the gap in case of the operation of the scroll compressor, thereby increasing a flow area of the fluid, and avoiding an excessive pressure drop loss to reduce the operation efficiency of the scroll compressor. Although in the present exemplary embodiment, 4 through holes 235 are shown formed in the stopper 234, it should be understood by those skilled in the art that the stopper 234 may be formed with more or less through holes 216. Preferably, the through holes 235 are symmetrically arranged about the guide portion 236 such that the force of the fluid is symmetrically applied to the valve sheet 220, thereby improving the stability and reliability of the movement of the valve sheet 220. Similarly, the valve seat 210 may also be formed with at least one of any number of valve bores 235. The valve seat 210, the valve plate 220, and the valve stopper 230 are not limited to the shapes shown, but may have any other suitable shape such as square or rectangular in cross section.

Alternatively, the baffle 240 may be disposed only on one side of the valve seat 210, i.e., partially around the valve seat 210. For example, in the scroll compressor shown in fig. 5, the flow guide 240 may be formed only on the right side of the valve seat 210, i.e., on the side where the discharge port 34 is located.

Fig. 6 schematically illustrates a partial cross-sectional view of a scroll compressor to which a check valve 300 according to a second embodiment of the present disclosure is applied. As shown in fig. 6, the check valve 300 according to the second embodiment of the present disclosure may include a valve seat 310, a valve plate 320, a valve stopper 330, and a flow guide 340. The structures of the valve seat 310, the valve plate 320, the valve stop 330 and the flow guide 340 according to the present embodiment may be similar to those of the corresponding components of the check valve 200 shown in fig. 5, and will not be described again. Unlike the structure of the check valve 200 shown in fig. 5, the flow guide 340 of the check valve 300 of the embodiment shown in fig. 6 is fixed to the diaphragm 30 instead of being fixed to the valve seat 310. The flow guide 340 may be fixed to the partition 30 by welding, for example. In the present embodiment, the flow guide 340 may be spaced apart from the outer edge of the valve seat 310, thereby increasing a gap between the flow guide 340 and the valve stopper 330, and thus, the check valve 300 according to the present embodiment may increase a flow area of fluid passing through the check valve 300 without affecting the flow guide 340 for fluid guiding, thereby further preventing excessive pressure drop loss.

Fig. 7 schematically illustrates a partial cross-sectional view of a scroll compressor to which a check valve 400 according to a third embodiment of the present disclosure is applied. The structures of the valve plate 420 and the valve stopper 430 according to the present embodiment may be similar to those of the corresponding parts of the check valves 200 and 300 shown in fig. 5 and 6, and will not be described again. Unlike the structures of the check valves 200 and 300 shown in fig. 5 and 6, the flow guide 440 of the check valve 400 of the embodiment shown in fig. 7 is coupled to the valve seat 410 so as to be formed as one piece. It should be understood that the term "integral" as used herein refers to an integrally formed part rather than two separate parts mechanically interconnected or fixed. Fig. 8 schematically illustrates a perspective view of an integrated piece of the check valve 400 formed by the flow guide 440 and the valve seat 410 according to the third embodiment of the present disclosure. As shown in fig. 8, the deflector 440 may extend upward from the upper surface of the valve seat 410 to surround the valve stop 430, in which case the first end 442 of the deflector 440 is disposed flush with the upper surface of the valve seat 410. Alternatively, the deflector 440 may extend upward along an outer edge of the upper surface of the valve seat 410 to be spaced apart from the valve stop 430 and the valve plate 420 by a sufficient gap in a state where the flow direction of the fluid can be guided, thereby facilitating assembly and use of the check valve 400 and avoiding excessive pressure drop loss.

Fig. 9 schematically illustrates a partial cross-sectional view of a scroll compressor to which a check valve 500 according to a fourth embodiment of the present disclosure is applied. The structures of the valve seat 510 and the valve plate 520 according to the present embodiment may be similar to those of the corresponding parts of the check valves 200 and 300 shown in fig. 5 and 6, and will not be described again. Unlike the structures of the check valves 200 and 300 shown in fig. 5 and 6, the deflector 540 of the check valve 500 of the embodiment shown in fig. 9 is coupled to the valve stopper 530 so as to be formed as one piece. Fig. 10 (a) and 10 (b) schematically show perspective views of an integrated piece of a flow guide 540 and a valve stopper 530 of a check valve 500 according to a fourth embodiment of the present disclosure. As shown in fig. 10 (a) and 10 (b), the valve stopper 530 may be formed with an extension 532 extending outwardly from the stopper 534, and the deflector 540 may extend downwardly from an outer edge of the extension 532. And as shown in fig. 9, the baffle 540 may extend vertically downward from the first end 542 to the second end 544, although fig. 9 illustratively shows the first end 542 disposed flush with the upper surface of the stop 534 and the second end 544 disposed flush with the upper surface of the valve seat 510, it will be appreciated by those skilled in the art that the first end 542 may also be disposed above the stop 534 and the second end 544 may also be disposed below the upper surface of the valve seat 510. In this embodiment, an orifice 538 may be formed between the adjacent extension 532 and the deflector 540, thereby increasing the flow area of the fluid. The plurality of orifices 538 may be symmetrically arranged on the unitary member to provide uniform distribution of the force exerted by the fluid, thereby enabling stable movement of the valve plate 520 and improving the stability and reliability of the check valve and scroll compressor. Although four extensions 532 are shown disposed between the deflector 540 and the stopper 534 of the formed one-piece body in the present embodiment, it is contemplated that the one-piece body may be formed with more or fewer extensions 532. In addition, the number of through holes 535 of the valve stop 530 shown in fig. 10 (a) is also merely exemplary. Although embodiments in which the deflector 540 is formed as a single piece with the valve stop 530 are specifically described herein, configurations in which the deflector is secured to the valve stop by an interference fit or the like are clearly within the scope of the present disclosure.

Fig. 11 (a) - (d) show the pressure profile of the upper and lower sides of the valve plate of the check valve over time when the scroll compressor is shut down, and the time when a significant pressure differential occurs can be taken as the response time of the check valve to the scroll compressor shut down, since the valve plate is displaced downward to close the valve orifice when a significant pressure differential occurs. Fig. 11 (a) and 11 (b) show pressure changes of a check valve in a compressor operating under a working condition where a pressure difference is large, wherein fig. 11 (a) shows pressure changes of a check valve of a comparative example as shown in fig. 1, and fig. 11 (b) shows pressure changes of a check valve having a flow guide according to an embodiment of the present disclosure. Further, fig. 11 (c) and 11 (d) show pressure changes of the check valve in the compressor operating under the working condition where the pressure difference is small, wherein fig. 11 (c) shows pressure changes of the check valve of the comparative example shown in fig. 1, and fig. 11 (d) shows pressure changes of the check valve having the flow guide according to the embodiment of the present disclosure. As can be seen by comparing fig. 11 (a) and 11 (b), the check valve of the comparative example, in which the flow guide is not provided, requires a response time of 0.2s when the scroll compressor is stopped under the condition that the pressure difference is large, whereas the check valve provided with the flow guide according to the present disclosure requires a response time of 0.1s, i.e., the response time is shortened. Whereas the check valve of the comparative example in which the flow guide is not provided as shown in fig. 11 (c) requires a response time of up to 0.5s when the scroll compressor is stopped under the working condition in which the pressure difference is small, the check valve provided with the flow guide according to the present disclosure as shown in fig. 11 (d) requires a response time of only 0.2s, and the effect of shortening the response time is remarkable with respect to the check valve of the comparative example. It can be seen therefrom that the one-way valve structure according to the present disclosure has a shortened response time, thereby contributing to a reduction in noise level of the scroll compressor. Meanwhile, the check valve rapidly closes the valve hole, so that fluid is prevented from flowing back to the vortex compression mechanism, and damage to internal parts of the compressor due to high-speed reverse rotation is avoided.

Those skilled in the art will appreciate that features described with respect to one aspect of the invention are equally applicable to other aspects of the invention. Although various embodiments of the present disclosure have been described in detail herein, it is to be understood that the disclosure is not limited to those precise embodiments described and shown herein, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit or scope of the disclosure. All such modifications and variations are intended to be within the scope of this disclosure. Moreover, all the components described herein may be replaced by other technically equivalent elements.

Claims

1. A scroll compressor comprising a partition (30) separating the scroll compressor into a suction side and a discharge side, the partition having an opening (32) in fluid communication with a discharge port of a scroll compression mechanism of the scroll compressor, and the scroll compressor being provided with a one-way valve (200, 300, 400, 500) at the opening (32), the one-way valve comprising:

A valve seat (210, 310, 410, 510) having a valve bore (216, 316, 416, 516) formed therein for passage of a fluid;

A valve plate (220, 320, 420, 520) disposed above the valve seat (210, 310, 410, 510) and configured to selectively open or close the valve bore (216, 316, 416, 516);

A valve stop (230, 330, 430, 530) disposed above the valve plate and fixedly connected to the valve seat, the valve stop comprising a stop (234, 334, 434, 534) limiting a maximum displacement range of the valve plate and a guide (236, 336, 436, 536) for guiding movement of the valve plate; and

A deflector (240, 340, 440, 540) configured to direct fluid flowing through the one-way valve (200, 300, 400, 500) to control a force applied by the fluid to the valve plate (220, 320, 420, 520),

Wherein the valve seat (210, 310, 410, 510) is directly fixed to the diaphragm (30) and extends beyond the diaphragm in a direction toward the exhaust side.

2. The scroll compressor of claim 1, wherein,

The deflector (240, 340, 440, 540) is configured to surround the stop (234, 334, 434, 534) outside the stop, and extends in a vertical direction at least between the valve seat (210, 310, 410, 510) and the stop.

3. The scroll compressor of claim 2, wherein,

The flow guides (240, 340, 440, 540) are configured as hollow cylinder structures.

4. The scroll compressor of claim 2, wherein,

The deflector (240, 340, 440) extends vertically upward from a first end to a second end, wherein the first end is vertically flush with or below an upper surface of the valve seat and the second end is vertically flush with or above the stop.

5. The scroll compressor of claim 4, wherein,

The deflector (240) is fixed to the outer circumferential surface of the valve seat (210) by interference fit, or the deflector (440) is formed as one piece with the valve seat (410).

6. The scroll compressor of claim 2, wherein,

The deflector (540) extends vertically downward from a first end to a second end, wherein the first end is vertically flush with or above the stop and the second end is vertically flush with or below an upper surface of the valve seat.

7. The scroll compressor of claim 6, wherein,

The deflector (540) is formed as one piece with the valve stop (530) or is fixed to the outer circumferential surface of the valve stop by interference fit.

8. The scroll compressor of any one of claims 1-7, wherein,

A gap is formed between the baffle (240, 340, 440, 540) and the stop allowing fluid flow therethrough.

9. The scroll compressor of any of claims 1-7, wherein said guide (236, 336, 436, 536) is inserted through a central aperture of said valve plate (220, 320, 420, 520) and fixedly connected in said valve seat (220, 320, 420, 520), said valve plate (220, 320, 420, 520) being movable along said guide (236, 336, 436, 536).

10. The scroll compressor of claim 1, wherein,

The flow guide piece (340) is fixed on the partition board (30).

11. The scroll compressor of claim 10, wherein,

A gap is formed between the deflector (340) and the valve seat (310).