WO2014008835A1

WO2014008835A1 - Pressure control valve and scroll compressor

Info

Publication number: WO2014008835A1
Application number: PCT/CN2013/078893
Authority: WO
Inventors: 孙庆丰
Original assignee: 艾默生环境优化技术(苏州)有限公司
Priority date: 2012-07-10
Filing date: 2013-07-05
Publication date: 2014-01-16

Abstract

A pressure control valve (100, 200) comprises a valve seat (140, 160) in which is formed a valve hole (142, 162), a first valve sheet member (110, 210) which covers the valve hole and is provided with a fluid passage (118, 218) thereon, and a second valve sheet member (120, 220) which is provided between the valve seat and the first valve sheet member and covers the fluid passage. Wherein, given that the direction directed from the second valve sheet member to the first valve sheet member is a first direction, when the pressure difference across two sides of the first valve sheet member and the second valve sheet member is directed to the first direction and is greater than or equal to a first preset value, the first valve sheet member is opened; when the pressure difference is directed to a second direction opposite to the first direction and is greater than or equal to a second preset value, the second valve sheet member is opened. Also disclosed is a scroll compressor comprising the pressure control valve. Also disclosed is a scroll compressor comprising a throttle valve for preventing or weakening the return flow from the back-pressure chamber to the pressure chamber.

Description

Pressure control valve and scroll compressor

Cross-reference to related applications

This application is filed on July 10, 2012, with the Chinese Patent Office, application number 2012102370388.1, the invention titled "Pressure Control Valve and Scroll Compressor including the Pressure Control Gang", on July 10, 2012 Submitted to the Chinese Patent Office, application number 201220331234.0, the Chinese patent application titled "Pressure Control Gang and the Vortex Reducer including the Pressure Control", submitted to the Chinese Patent Office on October 24, 2012, application number 201210410053.1, Chinese patent application titled "Pressure Control Gang and Scroll Compressor" and Chinese Patent Application submitted to China Patent Office on October 24, 2012, application number 201220547200.5, titled "Pressure Control Gang and Vortex Reducer" Priority is hereby incorporated by reference in its entirety. Technical field

The present invention relates to a pressure control valve and a scroll compressor. Background technique

[03] The content of this section merely provides background information related to the present disclosure, which may not constitute prior art.

When the pressure difference across the valve plate is greater than a predetermined value and is directed toward the first direction in which the valve plate ⁵ is opened, the valve plate is opened to allow fluid to flow through the one-way valve. When the pressure difference across the valve plate points in a second direction opposite the first direction, the valve plate does not open regardless of the value of the pressure difference across the valve plate to prevent fluid from flowing in the opposite direction. This one-way valve provides the fluid with a one-way flow capability.

[05] However, in some cases, it is not only necessary that the one-way valve can be opened when the pressure difference in the first direction reaches the first predetermined value, and that the one-way valve can reach the pressure difference in the second direction. The second predetermined value can be opened to achieve, for example, pressure dry release.

Those skilled in the art typically employ solenoid valves and pressure sensors disposed upstream and downstream of the solenoid valves to accomplish the above functions. This arrangement is relatively complicated and expensive. [07] Therefore, there is a need for a valve construction that provides a bidirectional flow function for a fluid based on the pressure differential across the valve. Summary of the invention

It is an object of one or more embodiments of the present invention to provide a pressure control valve that is capable of providing a two-way flow function to a fluid based on a pressure differential across the valve.

Another object of one or more embodiments of the present invention is to provide a pressure control valve that is simple in construction and low in cost.

Still another object of one or more embodiments of the present invention is to provide a scroll compressor with optimized operating performance.

[11] In order to achieve one or more of the above objects, according to one aspect of the present invention, a pressure control valve is provided, the pressure control valve may include: a valve seat in which a valve hole is formed; a first valve member, the first valve member shielding the valve hole and having a fluid passage formed thereon; and a second valve member, the second valve member being disposed at the valve seat and the first Between a valve member and shielding the fluid passage, wherein a direction from the second valve member to the first valve member is assumed to be a first direction, when the first valve member and the first When the pressure difference between the two valve plate members is directed to the first direction and greater than or equal to a first predetermined value, the first valve member is opened to allow fluid to flow through the pressure control valve; The second valve member is opened to allow fluid when a pressure differential across the valve plate member and the second valve member is directed in a second direction opposite the first direction and greater than or equal to a second predetermined value Flow through the pressure control Valve.

According to another aspect of the present invention, a scroll compressor including the above pressure control valve is provided. More specifically, the scroll compressor may include: a movable scroll member, the movable scroll member may include a first end plate and an orbiting scroll blade formed on the first end plate; The fixed scroll member may include a second end plate and a fixed scroll blade formed on the second end plate, and the fixed scroll blade and the movable scroll blade may be engaged with each other to form a gap therebetween a series of compression chambers, a side of the second end plate opposite to a side on which the fixed scroll vanes are formed may be formed with a recess; and a seal assembly disposed in the recess, the recess and the seal The space between the components may form a back pressure chamber that may be in fluid communication with one of the compression chambers via a communication passage; wherein the pressure control valve is disposed in the communication passage. [13] According to still another aspect of the present invention, a scroll compressor is provided, comprising: a movable scroll member, the movable scroll member including a first end plate and a movement formed on the first end plate a scroll blade; the fixed scroll member, the fixed scroll member including a second end plate and a fixed scroll blade formed on the second end plate, the fixed scroll blade and the movable scroll blade being mutually Engaging to form a series of compression chambers therebetween, a side of the second end plate opposite to a side on which the fixed scroll blade is formed is formed with a recess, and a seal assembly disposed in the recess, A space between the recess and the seal assembly forms a back pressure chamber, the back pressure chamber being in fluid communication with one of the compression chambers via a communication passage, wherein a fluid is prevented or attenuated from the back passage in the communication passage A throttle valve that presses the pressure chamber back to the compression chamber.

[14] Advantages of pressure control valves and/or scroll compressors in accordance with one or more embodiments of the present invention are:

[15] In a pressure control valve according to an embodiment of the present invention, a first valve member for shielding or closing a valve hole in a valve seat and a fluid passage for shielding or closing the first valve member are provided a second valve member, and when the pressure difference between the first valve member and the second valve member is directed in the first direction and greater than or equal to the first predetermined value, the first valve member can be opened, and When the pressure difference between the two sides of the first valve member and the second valve member is directed to the second direction and greater than or equal to the second predetermined value, the second valve member can be opened. Thus, the pressure control valve according to the present embodiment can have the ability to allow fluid to flow in two directions according to the pressure difference. Further, the pressure control valve according to the present embodiment is simple in structure and greatly reduced in cost as compared with a scheme in which a solenoid valve and a pressure sensor are employed.

In the pressure control valve according to other embodiments of the present invention, the first predetermined value and the second predetermined value may be set to be the same or different. Thus, the pressure control valve according to the present embodiment can be conveniently applied to various applications.

In the pressure control valve according to other embodiments of the present invention, the first predetermined value may be set, for example, by setting at least one of elasticity and pressure receiving area of the first valve member. In other words, by changing the material properties or shape characteristics (such as thickness and width) of the first valve member, or by changing the pressure receiving area of the first valve member, or by changing the above, the first can be easily changed or set. A predetermined value. Similarly, the second predetermined value can be set by setting at least one of the elasticity of the second valve member and the area of the fluid passage. Therefore, the pressure control valve according to the present embodiment can be easily adapted to different applications by changing the characteristics of the first valve member and/or the second valve member. [18] In a pressure control valve according to other embodiments of the present invention, a first valve member and a second molded member. Therefore, the first valve member and the second valve member can be easily manufactured at low cost.

In the pressure control valve according to other embodiments of the present invention, the first valve member and the second valve member may be integrally formed. For example, the first valve member and the second valve member may be integrally formed integrally by a molding process. Alternatively, the first valve member and the second valve member may be formed separately and then joined together by any suitable joining means (e.g., welding, bonding, riveting, etc.). The pressure control valve of this configuration further reduces the number of components and the configuration of the valve.

[20] In the pressure control valve according to other embodiments of the present invention, it is further possible to further include a valve stop member that restricts displacement of the first valve member in the first direction. Thereby, the risk of excessive deformation and/or fatigue damage of the first valve member can be reduced, and the reliability of the pressure control valve is increased.

In a pressure control valve according to other embodiments of the present invention, the valve stop member, the first valve member, and the second valve member may be fixed to the valve seat by fasteners to form a complete assembly. This is advantageous when installed in an application such as a compressor.

[22] In the pressure control valve according to other embodiments of the present invention, the first predetermined value may also be set by the elasticity of the first elastic member that provides the biasing force to the first valve member and the pressure of the first valve member Set at least one of the receiving areas. Additionally, the second predetermined value may also be set by at least one of the elasticity of the second elastic member that provides the biasing force for the second valve member and the area of the fluid passage. In the pressure control valve according to the present embodiment, the first predetermined value and the second predetermined value can be accurately set or changed by precisely setting the elasticity of the first elastic member and the second elastic member, thereby improving the pressure control valve pair The accuracy of the pressure difference response.

[23] In the pressure control valve according to other embodiments of the present invention, the first valve member, the second valve member, the first elastic member, and the second elastic member may be held in the valve seat by the retaining ring to form a complete Component. This is advantageous when installed in an application such as a compressor.

[24] In the scroll compressor according to an embodiment of the present invention, pressure control according to any of the above embodiments is provided in a communication passage connecting the back pressure chamber and one of the compression chambers (for example, the medium pressure chamber) valve. Therefore, when the compressor is operated under a relatively heavy load condition, for example, the pressure in the medium pressure chamber is greater than the pressure in the back pressure chamber to form a pressure difference in the first direction. Fluid in the medium pressure chamber can flow into the back pressure chamber to provide a suitable back pressure for the scroll assembly. In addition, due to the setting of the pressure control valve, when the pressure difference between the back pressure chamber and the medium pressure chamber is lower than a specific value, fluid flow is not generated between the back pressure chamber and the medium pressure chamber, thereby reducing the back pressure chamber. Pressure fluctuations in the middle. When the compressor returns from a relatively heavy load condition to a relatively light load condition, for example, the pressure in the back pressure chamber is greater than the pressure in the medium pressure chamber to create a pressure differential in the second direction. When the pressure difference reaches a certain value, the fluid in the back pressure chamber can flow into the intermediate pressure chamber to achieve pressure release of the back pressure chamber. In this case, the pressure in the back pressure chamber can be kept low, so that the contact pressure between the two scroll members can be alleviated, thereby reducing the wear of the scroll assembly and other related components. In other words, the scroll compressor according to the present embodiment not only reduces the pressure fluctuation in the back pressure chamber but also provides a variable back pressure according to the operating conditions of the compressor, thereby optimizing the running performance of the compressor.

In the scroll compressor according to other embodiments of the present invention, a portion around the communication passage of the fixed scroll member can be used as a valve seat of the pressure control valve, and the communication passage can be used as a valve hole of the pressure control valve. In other words, the valve seat of the pressure control valve can be formed by a portion of the fixed scroll member, which further simplifies the structure of the compressor.

In the scroll compressor according to other embodiments of the present invention, the entire assembly or valve seat of the pressure control valve can be fitted in the communication passage, which further simplifies the assembly process of the compressor.

[27] In a scroll compressor according to another embodiment of the present invention, a fluid is prevented or weakened from the back pressure chamber in a communication passage connecting the back pressure chamber and one of the compression chambers (for example, the medium pressure chamber) A throttle valve that recirculates the compression chamber. In the scroll compressor according to the present embodiment, even when the compressor is operated under severe conditions, it is possible to ensure sufficient back pressure in the back pressure chamber, thereby improving the running performance of the compressor. In addition, when the compressor is operated under different operating conditions, the pressure fluctuations in the back pressure chamber can be reduced, thereby further improving the running performance of the compressor. In particular, the throttle valve can be a one-way valve that allows fluid to flow from the compression chamber toward the back pressure chamber. Therefore, the overall manufacturing cost of the compressor can be further reduced.

[28] Other application areas will become apparent through the description provided herein. It is to be understood that the specific examples and embodiments described herein are intended to be DRAWINGS

The drawings described in this section are for purposes of illustration and description, 1 is a longitudinal sectional view of a scroll compressor according to a first embodiment of the present disclosure.

[31] Fig. 2 is a partial enlarged view of Fig. 1.

Figure 3A is a schematic diagram showing pressure changes in a back pressure chamber.

Figure 3B is a schematic illustration of a variation of the compression chamber corresponding to the change in back pressure in Figure 3A.

Fig. 4A is an assembled perspective view of a fixed scroll member including a pressure control valve according to the first embodiment.

Fig. 4B is an exploded perspective view of the pressure control valve and the fixed scroll member of Fig. 4A.

Figure 5A is a partial longitudinal cross-sectional view of the pressure control valve and the fixed scroll member.

Figure 5B is a partially cutaway perspective view of the pressure control valve and the fixed scroll member.

Figure 6A is a perspective view of the first valve member, the second valve member, and the valve stop.

Figure 6B is a top plan view of the first valve member, the second valve member, and the valve stop.

Fig. 7 is a perspective view showing a modification of the first valve member and the second valve member according to the first embodiment.

Fig. 8A is an assembled perspective view of a pressure control valve according to another modification of the first embodiment.

Figure 8B is an exploded perspective view of the pressure control valve of Figure 8A.

Fig. 9A is an assembled perspective view of a fixed scroll member including a pressure control valve according to a second embodiment.

Figure 9B is an exploded perspective view of the pressure control valve and fixed scroll member of Figure 9A.

Fig. 10A is a perspective view of the first valve member, the second valve member, the first elastic member, and the second elastic member.

Fig. 10B is a side view of the first valve member, the second valve member, the first elastic member, and the second elastic member.

Figure 11 is a view of a fixed scroll member mounted with a pressure control valve according to a second embodiment Sectional view.

Fig. 12A is an assembled perspective view of a pressure control valve according to a modification of the second embodiment.

Figure 12B is an exploded perspective view of the pressure control valve of Figure 12A.

Figure 13 is a partial cross-sectional view of a fixed scroll member to which a pressure control valve of the modification shown in Figure 12A is mounted.

Figure 14 is a plan view of a modification according to the second embodiment.

Figure 15 is an exploded perspective view of still another embodiment of the present invention. detailed description

The following description is merely exemplary in nature and is not intended to limit the scope It should be understood that in the drawings, referenced

The basic configuration and principle of the scroll compressor 10 according to an embodiment of the present disclosure will be described below with reference to Figs. 1, 2, 3A and 3B.

As shown in FIG. 1, the scroll compressor 10 generally includes a substantially cylindrical casing 12, a top cover 14 disposed at the end of the casing 12, a bottom cover 16 disposed at the other end of the casing 12, and a setting Between the top cover 14 and the housing 12 is partitioned into a partition 15 of the high pressure side and the low pressure side. A high pressure side is formed between the partition 15 and the top cover 14, and a low pressure side is formed between the partition 15, the casing 12 and the bottom cover 16. An intake joint (not shown) for sucking in fluid is disposed on the low pressure side, and an exhaust joint 18 for discharging the compressed fluid is disposed on the high pressure side. The housing 12 is provided with a motor 20 composed of a stator 22 and a rotor 24. A drive shaft 30 is provided in the rotor 24 to drive a compression mechanism composed of the fixed scroll member 80 and the orbiting scroll member 70. Referring also to Fig. 2, the movable scroll member 70 includes an end plate 72, a hub portion 74 formed on one side of the end plate, and a spiral blade 76 formed on the other side of the end plate. The fixed scroll member 80 includes an end plate 82, a spiral blade 86 formed on one side of the end plate, and an exhaust port 88 formed at a substantially central position of the end plate. A series of compression chambers whose volume gradually decreases from the radially outer side to the radially inner side are formed between the spiral blade 86 of the fixed scroll member 80 and the spiral blade 76 of the movable scroll member 70. The radially outermost compression chamber is at the suction pressure and the radially innermost compression chamber is at the discharge pressure. The intermediate compression chamber is between the suction pressure and the discharge pressure and is therefore also referred to as the medium pressure chamber. One side of the orbiting scroll member 70 is supported by the upper portion of the main bearing housing 40. Here, the portion of the main bearing housing 40 that supports the orbiting scroll member 70 constitutes a thrust member. In other embodiments, the thrust members can be formed separately from the main bearing housing and then secured together by fastening means. The main bearing housing 40 is fixed relative to the housing 12 by suitable fastening means.

The drive shaft 30 is rotatably supported by a main bearing 44 provided in the main bearing housing 40 and a lower bearing 52 provided in the lower bearing housing 50. The lower bearing housing 50 is fixed relative to the housing 12 or the bottom cover 16 via, for example, a bracket 54. Additionally, weights 26 and 28 may be provided on the drive shaft 30 or on the rotor 24 to maintain dynamic balance.

One end of the drive shaft 30 is provided with an eccentric crank pin 36. An unloading bushing 38 is disposed between the eccentric crank pin 36 and the hub portion 74 of the orbiting scroll member 70. By the driving of the motor 20, the orbiting scroll member 70 can be rotated normally with respect to the fixed scroll member 80 (i.e., the central axis of the orbiting scroll member 70 is rotated about the central axis of the fixed scroll member 80, but the orbiting scroll member 70 is rotated. It does not rotate itself about its central axis to achieve fluid compression. The above translational rotation is achieved by the cross slip ring 48 provided between the fixed scroll member 70 and the movable scroll member 80.

The fluid compressed by the fixed scroll member 70 and the orbiting scroll member 80 is discharged to the high pressure side through the exhaust port 88. In order to prevent the fluid on the high pressure side from flowing back to the low pressure side via the exhaust port 88 under certain conditions, a check valve or exhaust valve 89 is provided at the exhaust port 88. The exhaust valve 89 allows fluid in the compression chamber to flow to the high pressure side, but prevents fluid on the high pressure side from flowing back to the compression chamber.

Alternatively or additionally, a shut-off valve 90 may be provided downstream of the exhaust port 88. In the example shown in FIGS. 1 and 2, the shut-off valve 90 is disposed at the opening 19 of the partition 15. The opening 19 is generally aligned with the exhaust port 88 of the fixed scroll member 80. The shut-off valve 90 can include a base portion 92, an elongated conduit portion 94 coupled to the base portion 92, and a valve plate 96 that shields the opening 19. The base 92 can include a plurality of legs to form a gap between the legs for fluid flow. One end of the duct portion 94 extends into the exhaust joint 18 or near the exhaust joint 18, and the other end of the duct portion 94 is fixed to the base portion 92 and faces the valve piece 96. During normal operation of the compressor, fluid discharged from the exhaust port 88 will push the valve plate 96 upward against the inner side surface of the base 92, and the discharged fluid flows from the gap between the legs of the base into the high pressure side, thereby The exhaust connector 18 is exhausted. When the compressor is shut down, there may be fluid flowing from the exhaust joint 18 toward the high pressure side. At this point, a portion of the recirculated fluid will act directly on the surface of the valve plate 96 through the conduit portion 94, thereby rapidly pushing the valve plate 96 down to a position against the opening 19 of the diaphragm 15. Thereby, the fluid pressure of the backflow is prevented from acting on the fixed scroll member. One end of the drive shaft 30 supported by the lower bearing housing 50 may include an oil hole 32. Preferably, the oil hole 32 is concentric with the axis of rotation of the drive shaft 30, and thus the oil hole is also referred to as a concentric hole 32. The drive shaft 30 can also include an eccentric bore 34 that is in fluid communication with the concentric bore 32 and that is eccentric with respect to the concentric bore 32 and extends generally longitudinally of the drive shaft to an end face of the eccentric crank pin 36. A pumping device 56 may be provided at one end of the drive shaft 30 where the concentric holes 32 are provided. For example, pumping unit 56 can be any suitable device such as a rotor pump, impeller pump, oil fork, and the like.

With the above configuration, when the compressor is in operation, the lubricating oil at the bottom of the casing 12 will first be supplied to the concentric bore 32 of the drive shaft 30 through the pumping device 56, and then via the eccentric bore in fluid communication with the concentric bore 32. 34 is supplied to the end of the eccentric crank pin 36. Then, the lubricating oil discharged from the eccentric crank pin 36 can be supplied to various components in the compressor by gravity or by splashing of the movable member to achieve lubrication and cooling. In addition, the splashed lubricating oil droplets may also mix with the fluid flowing in from the intake fitting and be carried by the fluid into the compression mechanism and the high pressure side to lubricate and cool the scroll member and other components.

[63] In order to realize the tip end of the spiral blade 86 of the fixed scroll member 80 and the end plate 72 of the movable scroll member 70, and the tip end of the spiral blade 76 of the orbiting scroll member 70 and the end plate 82 of the fixed scroll member 80 The axial seal between them is generally provided with a recess 84 on the side of the end plate 82 of the fixed scroll member 80 opposite to the spiral blade 86. A seal assembly 85 is provided in the recess 84, and the axial displacement of the seal assembly 85 is limited by the diaphragm 15. The space between the recess 84 and the seal assembly 85 constitutes the back pressure chamber of the fixed scroll member 80. The back pressure chamber is in fluid communication with the intermediate pressure chamber through an axially extending communication passage 83 formed in the end plate 82 to form a force that urges the fixed scroll member 80 toward the orbiting scroll member 70. Since one side of the orbiting scroll member 70 is supported by the upper portion of the main bearing housing 40, the fixed scroll member 80 and the orbiting scroll member 70 can be effectively pressed together by the pressure in the back pressure chamber. When the pressure in each compression chamber exceeds a set value, the resultant force in the pressure in these compression chambers will exceed the downward pressure provided in the back pressure chamber to cause the fixed scroll member 80 to move upward. At this time, the fluid in the compression chamber will pass through the gap between the tip end of the spiral blade 86 of the fixed scroll member 80 and the end plate 72 of the movable scroll member 70 and the tip end of the spiral blade 76 of the orbiting scroll member 70 and the fixed vortex. The gap between the end plates 82 of the rotary member 80 leaks to the low pressure side to effect unloading, thereby providing axial flexibility to the scroll compressor.

The inventors of the present application have found that the pressure in the back pressure chamber fluctuates because the communication passage 83 provides intermittent communication between the back pressure chamber and the medium pressure chamber. As shown in Figs. 3A and 3B, when the fixed scroll member 80 and the orbiting scroll member 70 are at the relative positions shown in (a), the pressure at the point P1 corresponds to the pressure I in Fig. 3A, along with the movable scroll member. The translation of 70 is rotated, and the pressure of P1 is gradually increased. And the maximum pressure II is reached at the relative position shown in (b). After maintaining the maximum pressure II for a period of time, a large pressure drop III occurs at the pressure of the relative position P1 shown in (c). As the compressor operates, the back pressure provided by the back pressure chamber circulates cyclically.

[65] However, when the compressor is operated under severe conditions, such back pressure fluctuations may cause insufficient back pressure at a certain moment, resulting in a decrease in the performance of the compressor.

In order to solve the above problems, in one embodiment, the applicant proposes to provide a check valve 300 in a communication passage between the back pressure chamber and the intermediate pressure chamber, as shown in Fig. 15. The valve piece 310 of the check valve 300 can cover the end of the communication passage 83. The valve plate 310 may be supported by an elastic material such as metal. Thus, when the pressure in the medium pressure chamber is higher than the pressure in the back pressure chamber, the fluid in the medium pressure chamber can push the valve plate 310 open to flow into the back pressure chamber. When the pressure of the back pressure chamber is higher than the medium pressure chamber, the valve plate 310 can close the communication passage 83, so that the fluid in the back pressure chamber cannot flow into the medium pressure chamber. Therefore, sufficient back pressure can be provided regardless of the operating conditions. Further, in order to further prevent excessive deformation of the valve piece 310, a valve stop 320 may be provided on the side of the valve piece 310 opposite to the end of the communication passage 83. The one-way valve 300 composed of the valve piece 310 and the valve stop 320 may pass, for example, tightly The firmware 330 is fixed to the fixed scroll member 80.

[67] While it is generally understood that a one-way valve is a valve device that allows fluid to flow in one direction and prevents fluid from flowing in the opposite direction, those skilled in the art will appreciate that in the concept of the present invention, even if the one-way valve is reversed as described above It is also possible to allow a small amount of fluid to pass through in the direction and also achieve better results, for example by placing one or more small holes in the valve plate of the check valve, or in the valve or seat of the check valve (in the figure) In the example of 15, the valve seat may be a gap between the wall surfaces around the end of the communication passage 83). In other words, instead of the above-described one-way valve, a throttle valve capable of preventing or reducing the backflow of fluid from the back pressure chamber to the compression chamber may be employed in the above example.

[68] Accordingly, the inventor of the present application has found that when such a one-way valve is provided, when the compression is in a bad working condition or the relatively heavy working condition returns to a relatively light load condition, due to the one-way The valve is blocked and the pressure in the back pressure chamber cannot be released, resulting in excessive back pressure and increased compressor wear and power consumption.

To this end, the inventors of the present application have further proposed a pressure control valve capable of providing a bidirectional flow function for a fluid based on a pressure difference across the valve.

The pressure control valve 100 according to the first embodiment of the present disclosure, which is disposed in the communication passage 83, is illustrated in FIGS. 1 and 2. FIG. 4A further illustrates a perspective view of a fixed scroll member 80 mounted with a pressure control valve 100. As shown in the exploded perspective view of FIG. 4B, the pressure control valve 100 may include the A valve plate member 110 and a second valve plate member 120. The first valve member 110 can shield or close the communication passage 83. As shown in Figures 6A and 6B, a fluid passage 118 may be formed in the first valve member 100. The second valve member 120 can be configured to shield or enclose the fluid passage 83 in the first valve member 110.

Specifically, the first valve member 110 may include: a base portion 112; an elastic neck portion 114 extending from the base portion 112; and a head portion 116 coupled to the neck portion 114. The head 116 can shield or close the communication passage 83. In the example shown in the figures, the fluid passage 118 in the first flap member 110 may be constituted by a through hole formed in the head portion 116. However, it will be understood by those skilled in the art that the fluid passage 118 can also be formed by a plurality of through holes.

The second valve member 120 can include: a base 122; an elastic neck 124 from which the portion 122 extends; a tongue 126 coupled to the neck 124; and a periphery that is coupled to the neck 124 and that surrounds the tongue 126 Department 128. The tongue 126 can be coupled to the neck 124 via its own neck 125. The area of the tongue 126 can be smaller than the area of the head 116. The tongue 126 can shield or enclose the fluid passage 118 of the first valve member 110 and can move in a direction away from the first valve member 110. Accordingly, the first valve member 110 can be moved in a direction away from the second valve member 120 or the communication passage 83. The return spring forces of the first and second valve member members 110, 120 are primarily provided by their respective necks 114 and 124. However, it will be understood by those skilled in the art that various portions of the first valve member and the second valve member may provide such a resilient force.

The pressure control valve 100 may further include a valve stop member 130 that limits the displacement of the first valve plate member 110. The valve stop member 120 can include a base 132 and a stop 134 extending from the base 132. Those skilled in the art will appreciate that the valve stop member 130 is not required but may be omitted.

The first valve member 110 and the second valve member 120 may be mounted in a communication passage 83 of the fixed scroll member 80 in a stacked manner such that the peripheral portion 128 of the second valve member 120 abuts On the step around the communication passage 83 and the head 110 of the first valve member 110 is superposed on the tongue 126 and the peripheral portion 128 of the second valve member 120.

In the example shown in FIGS. 5A and 5B, the valve stop member 130, the first valve member 110, and the second valve member 120 pass through fasteners 150 such as pins through their respective fixing holes 133, 113 and 123 are fixed to the fixed scroll member 80.

The first valve member 110 and the second valve member 120 may be a punched member punched from a metal plate or a molded member molded by an elastic material. Therefore, the first valve member 110 and the second valve member 120 can be easily manufactured at low cost. Those skilled in the art should The first valve member and the second valve member may be made of different materials or made of the same material of different thicknesses.

It is assumed that the direction from the second flap member 120 to the first flap member 110 is the first direction. In the thus configured pressure control valve 100, when the pressure difference between the first valve piece member 110 and the second valve piece member 120 (i.e., the pressure difference between the intermediate pressure chamber and the back pressure chamber) is directed to the first direction and When greater than or equal to the first predetermined value, the first valve member 110 is moved in the first direction to be opened to allow fluid to flow through the pressure control valve. When the pressure difference between the first valve member 110 and the second valve member 120 is directed to a second direction opposite to the first direction and greater than or equal to a second predetermined value, the second valve member 120 moves in the second direction It is thus opened to allow fluid to flow through the pressure control valve.

The first predetermined value and the second predetermined value may be set to be the same or different. For example, the second predetermined value can be set to be greater than or equal to the first predetermined value. Alternatively, the second predetermined value may be set to be smaller than the first predetermined value. Therefore, the pressure control valve 100 can be conveniently applied to various applications.

In the pressure control valve 100 according to the present embodiment, the first predetermined value can be set, for example, by setting at least one of the elasticity and the pressure receiving area of the first valve member 110. For example, it may be easy to change the material properties or shape characteristics of the first valve member 110 (for example, the thickness and width of the neck portion 114), or by changing the pressure receiving area of the first valve member 110, or by changing the above two. Change or set the first predetermined value. In the example shown in Fig. 6A, the pressure receiving area of the first flap member 110 can be defined, for example, by the area between the peripheral portion 128 of the second flap member 120 and the tongue 126. The pressure receiving area herein can be understood as the area of the first valve member 110 that is subjected to fluid pressure. Since the peripheral portion 128 and the tongue portion 126 of the second valve member 120 shield a portion of the first valve member 110 and the second valve plate member itself can withstand a certain force, the pressure receiving area of the first valve member 110 It may be substantially equal to the area between the peripheral portion 128 of the second valve member 120 and the tongue 126.

Similarly, the second predetermined value can be set, for example, by setting the elasticity of the second valve member 120 (e.g., particularly the thickness, width or material of the neck 125 of the tongue 126 itself) and the area of the fluid passage 118. At least one item to set.

[81] The pressure difference between the medium pressure chamber and the back pressure chamber can be reasonably controlled by appropriately setting the first predetermined value and the second predetermined value, thereby reducing pressure fluctuations in the back pressure chamber on the one hand, and The variable back pressure is provided according to the operating conditions of the compressor, thereby optimizing the operating performance of the compressor.

[82] For example, when the compressor 10 is in normal operation or from a relatively light load condition to a relative In heavy duty conditions, the pressure in the medium pressure chamber is greater than the pressure in the back pressure chamber to create a pressure differential in the first direction. When the pressure difference reaches the first predetermined value, the first flap member 110 is opened. Further, due to the setting of the pressure control valve 100, the pressure difference in the second direction between the back pressure chamber and the intermediate pressure chamber is lower than, for example, At the second predetermined value, the second valve member 120 does not open, so fluid flow does not occur between the back pressure chamber and the medium pressure chamber, thereby avoiding pressure fluctuations in the back pressure chamber. The pressure differential in the second direction between the back pressure chamber and the medium pressure chamber may be greater than a second predetermined value when the compressor is returned from a relatively heavy duty condition to a relatively light load condition, for example. At this time, the second valve member 120 is opened to allow the fluid in the back pressure chamber to flow into the intermediate pressure chamber to achieve pressure release of the back pressure chamber. In this case, the pressure in the back pressure chamber can be kept low, so that the contact pressure between the fixed scroll member 80 and the movable scroll member 70 can be reduced, thereby reducing the wear therebetween.

In the example shown in Figs. 5A and 5B, the first valve member 110 shields the communication passage 83 via the peripheral portion 128 of the second valve member 120. However, it will be understood by those skilled in the art that the peripheral portion 128 can be omitted so that the first valve member 110 can directly shield the communication passage 83.

Further, in the example shown in Figs. 6A and 6B, the fluid passage 118 is formed at the head 116 of the first flap member 110. However, fluid passage 118 may also be formed, for example, in other suitable locations, such as in neck 114. Accordingly, the position of the tongue portion 126 of the second flap member 120 can also be changed correspondingly, and a space for the deformation of the tongue portion 126 can be provided in the communication passage 83.

In the example shown in FIGS. 6A and 6B, the first flap member 110 and the second flap member 120 are formed separately and secured together by, for example, fasteners 150. However, according to a variant of the embodiment, the first valve plate member and the second valve plate member may be formed in one piece. For example, the first valve member and the second valve member may be integrally formed integrally by a molding process. Alternatively, the first valve member and the second valve member may be formed separately and then joined together by any suitable attachment means (e.g., splicing, bonding, riveting, etc.). For example, Figure 7 shows a bottom perspective view of a variation of the first valve member 110 and the second valve member 120A. The first valve member 110 may have exactly the same configuration as the first valve member in FIG. 6A. The second valve member 120A can include a base 122A, an elastic neck 125A extending from the base 122A, and a tongue 126A coupled to the neck 125A. The base 122A can be evaluated, for example, at the neck 114 of the first valve member 110, and the tongue 126A can shield the fluid passage 118 of the first valve member 110. The first valve member and the second valve member thus constructed further reduce the number of components of the pressure control valve and simplify the structure thereof. With the pressure control valve according to the present modification, the pressure receiving area of the first valve member 110 for setting the first predetermined value may be the first valve member 110 and the communication passage 83 The overlapping area is defined.

In the example shown in Figs. 5A and 5B, the pressure control valve 100 utilizes a portion around the communication passage 83 in the fixed scroll member 80 as a valve seat, and utilizes the communication passage 83 as a valve hole. According to another variation of this embodiment, the pressure control valve can be formed as a separate component. For example, as shown in Figs. 8A and 8B, the pressure control valve 100B may include a first valve member 110, a second valve member 120, a valve member 130, and a valve seat 140. A valve hole 142 is formed in the valve seat 140. In the present variation, the valve stop member 130, the first valve plate member 110, the second valve plate member 120, and the valve seat 140 pass through their respective fixing holes 133, 113, and 123 and 143 by, for example, two fasteners 150. Fixed together. The pressure control valve 100B as a separate component according to the present modification can be directly fitted in the communication passage 83 of the fixed scroll member 80. Other configurations and operational principles of the pressure control valve 100B according to the present modification are substantially the same as those described with reference to Figs. 5A, 5B and 6A, 6B, and therefore will not be described herein.

9A-11 illustrate a pressure control valve 200 in accordance with a second embodiment. 9A shows a perspective view of the fixed scroll member 80 to which the pressure control valve 200 according to the present embodiment is mounted, and FIG. 9B shows an exploded perspective view of the pressure control valve 200.

Referring to FIGS. 9B, 10A and 10B simultaneously, the pressure control valve 200 may include a first valve plate member 210, a second valve plate member 220, a first elastic member 230 that provides a biasing force to the first valve plate member 110, and A second resilient member 240 that provides a biasing force to the second valve member 220. The first valve member 210, the second valve member 220, the first elastic member 230, and the second elastic member 240 may be fixed in the communication passage 83 by, for example, a retaining ring 250.

More specifically, the first valve member 210 may include a body portion 212 that shields the communication passage 83 in a second direction (ie, a direction from the first valve member 210 toward the second valve member 220, or from the back) The pressure chamber is directed in the direction of the intermediate pressure chamber) an extension 214 extending from the body portion 212 and a projection 216 projecting radially outward from the extension portion 214. The fluid passage 218 may be formed by at least one through hole formed in the body portion 212.

A through hole 222 through which the extension portion 214 of the first valve member 210 passes may be formed in the second valve member 220.

The first resilient member 230 may be disposed between the first valve member 210 and the retaining ring 250 to provide a biasing force to the first valve member 210 to shield or enclose the communication passage 83. A second resilient member 240 is disposed between the second valve member 220 and the projection 216 to provide a biasing force to the second valve member 220 to shield or enclose the fluid passageway 218.

FIG. 11 shows a fixed scroll member mounted with the pressure control valve 200 according to the present embodiment. A partial cross-sectional view of 80. Similarly, when the pressure difference between the first valve member 210 and the second valve member 220 (ie, the pressure difference between the intermediate pressure chamber and the back pressure chamber) is directed to the first direction (ie, from the medium pressure chamber to the back pressure) When the direction of the cavity is greater than or equal to the first predetermined value, the first valve member 210 is moved in the first direction against the elastic force of the first elastic member 230 to be opened to allow the fluid flow to control the valve. At this time, due to the action of the protruding portion 216 of the first flap member 210 and the second elastic member 240, the second flap member 220 also moves in the first direction along with the first flap member 210. When the pressure difference between the two sides of the first valve member 210 and the second valve member 220 is directed to the second direction opposite to the first direction and greater than or equal to the second predetermined value, the periphery of the first valve member 210 is connected The step around the 83 is supported without moving in the second direction, but the second flap member 220 is movable in the second direction by the elastic force of the second elastic member 240 to be opened to allow the fluid to flow through the pressure Control valve.

[93] In the present embodiment, similarly, the first predetermined value may be set by setting at least one of elasticity (for example, a spring constant) of the first elastic member and a pressure receiving area of the first valve member, And the second predetermined value may be set by setting at least one of elasticity (for example, spring constant) of the second elastic member and an area of the fluid passage. Here, since the second valve piece member 220 moves with the first valve piece member 210 when the first valve piece member 210 is opened in the first direction, the fluid pressure acting on the second valve piece member 220 is also transmitted. Onto the first valve member 210. Therefore, the pressure receiving area of the first flap member 210 can be defined by the overlapping area of the first flap member 210 and the communication passage 83.

In the example shown in Figs. 9A and 9B, the pressure control valve 200 utilizes a portion around the communication passage 83 in the fixed scroll member 80 as a valve seat, and utilizes the communication passage 83 as a valve hole. According to a variant of this embodiment, the pressure control valve can be formed as a separate component. For example, as shown in Figures 12A and 12B, the pressure control valve 200A can further include a valve seat 260. A valve hole 262 is formed in the valve seat 260. The first valve member 210, the second valve member 220, the first elastic member 230, and the second elastic member 240 may be retained in the valve seat 260 by the retaining ring 250 to form a separate assembly. As shown in Fig. 13, the pressure control valve 200A as a separate component according to the present modification can be directly fitted in the communication passage 83 of the fixed scroll member 80. Other configurations and operational principles of the pressure control valve 200A according to the present modification are substantially the same as those of the embodiment described with reference to Fig. 11, and therefore will not be described again.

In the example shown in FIG. 10A, the first elastic member 230 is formed of a coil spring, and the second elastic member 240 is formed of a spring bracket. It will be understood by those skilled in the art that the specific forms of the first elastic member and the second elastic member are not limited thereto, and various other suitable forms may be employed. For example, the first elastic member may be formed as a resilient bracket, a snap ring or a leaf spring. The second elastic member may be formed as a coil spring, a snap ring or a leaf spring.

In the example shown in Fig. 11, the first elastic member 230 is disposed between the retaining ring 250 and the first valve member 210. Those skilled in the art will appreciate that the retaining ring 250 can be omitted and the first resilient member can be directly secured relative to the fixed scroll member. Further, in the example shown in Fig. 11, the second elastic member is disposed between the second valve sheet member and the projection of the first valve sheet member. Those skilled in the art will appreciate that the projections 216 and/or extensions 214 may be omitted and the second resilient member may be directly secured relative to the fixed scroll member. For example, the second elastic member may be disposed between the second valve sheet member and the step portion around the communication passage 83. Similarly, for the variation shown in Fig. 12A, the protrusion 216 and/or the extension 214 may be omitted, and the second elastic member may be disposed between the second valve member and the step of the valve seat.

Further, the features of the first embodiment and the features of the second embodiment may be combined. For example, as shown in Fig. 14, Fig. 14 shows a bottom view of the first valve member and the second valve member. The second valve member 220B may be formed integrally with the first valve member 210B. Specifically, a fluid passage formed by at least one through hole 218B may be formed on the first valve sheet member 210B. The second valve member 220B can include a base 222B coupled to the first valve member 210B, an elastic neck portion 224B extending from the base portion 222B, and a tongue portion 226B coupled to the neck portion 224B. The tongue 226B can shield the through hole 218B in the first flap member 210B. In the example shown in Fig. 14, the first flap member 210B is shown to have four through holes 218, and accordingly the second flap member 220B has four neck portions 224B and four tongue portions 226B. However, it will be understood by those skilled in the art that the number of through holes, necks and tongues can be arbitrarily changed as needed, for example, from 1 to 3 or more. Here, the elastic neck portion 224B can be used as the second elastic member. The first valve member member and the second valve member member thus constructed can be applied to the example shown in Fig. 11 or 13 in place of the first valve member, the second valve member, and the second elastic member. Other configurations and operational principles of this modification are the same as those of the above embodiment, and therefore will not be described.

Although the pressure control valve of the present invention and the scroll compressor including the pressure control valve are described above with reference to the configuration in which the back pressure chamber is disposed on the fixed scroll member, those skilled in the art should understand the pressure of the present invention. The control valve can also be applied to a scroll compressor in which the back pressure chamber is disposed on one side of the movable scroll member. On the other hand, those skilled in the art will appreciate that the pressure control valve according to the present invention can also be applied to applications other than scroll compressors to achieve bidirectional control of the fluid based on the pressure difference between the two sides.

[99] While various embodiments and aspects of the invention are described above, it will be understood by those skilled in the art that the invention may be further modified and/or modified. [100] For example, in some aspects, the first valve plate member may include: a first base fixed relative to the valve seat; an elastic first neck portion extending from the first base; and a head to which the first neck is connected, wherein the head may shield the valve hole, and the fluid passage may be constituted by at least one through hole formed in the head.

[101] For example, in some aspects, the second valve sheet member can include: a second base fixed relative to the valve seat; a resilient second neck portion extending from the second base; and a tongue connected to the second neck, the tongue shielding the fluid passage of the first valve member and movable in the second direction.

[102] For example, in some aspects, the area of the tongue can be smaller than the area of the head.

[103] For example, in some aspects, the second valve sheet member may further include a peripheral portion connected to the second neck portion and surrounding the tongue portion, the peripheral portion being abutted around the valve hole The valve seat is seated, and the head of the first valve member can shield the valve hole via the peripheral portion.

[104] For example, in some aspects, the first predetermined value may be set by setting at least one of elasticity and pressure receiving area of the first valve member, the second predetermined value may pass Setting at least one of elasticity of the second valve member and an area of the fluid passage is set.

For example, in some aspects, the pressure receiving area of the first valve member may be defined by an area between the peripheral portion of the second valve member and the tongue.

[106] For example, in some aspects, the elasticity of the first valve sheet member is primarily provided by the first neck portion, and the elasticity of the second valve sheet member is primarily provided by the second neck portion .

For example, in some aspects, the pressure control valve may further include a valve stop member that limits displacement of the first valve plate member in the first direction.

For example, in some aspects, the valve stop member, the first valve member, and the second valve member can be secured to the valve seat by fasteners.

[109] For example, in some aspects, the second valve plate member and the first valve plate member may be formed in one piece. For example, in some aspects, the pressure control valve may further include a first resilient member that provides a biasing force in the second direction for the first valve member and a second valve member along the first A second elastic member of the biasing force of the direction. For example, in some aspects, the first valve plate member can include a body portion that is movable relative to the valve seat and shields the valve bore, and wherein the fluid passageway can be formed on the body portion At least one through hole is formed.

For example, in some aspects, the pressure control valve can further include a retaining ring that retains the first valve plate member and the second valve plate member in the valve seat.

I] For example, in some aspects, the first elastic member may be disposed between the first valve member and the retaining ring.

[114] For example, in some aspects, the first valve member can further include the second

For example, in some aspects, the second valve plate member is formed with a through hole through which the extension of the first valve member passes. For example, in some aspects, the second resilient member can be disposed between the second valve member and the projection.

^?] For example, in some aspects, the second elastic member may be provided between the plate member and the second valve seat.

For example, in some aspects, the second valve member can be formed integrally with the first valve member. Further, the second valve plate member may include: a base coupled to the first valve plate member; an elastic neck extending from the base, and at least one tongue coupled to the neck The at least one tongue shields the at least one through hole of the first valve sheet member.

[119] For example, in some aspects, the neck can be used as the second elastic member.

[120] For example, in some aspects, the first elastic member may be a coil spring, and the second elastic member may be a resilient bracket.

[121] For example, in some aspects, the first predetermined value may be set by setting at least one of elasticity of the first elastic member and a pressure receiving area of the first valve sheet member The second predetermined value may be set by setting at least one of elasticity of the second elastic member and an area of the fluid passage.

[122] For example, in some aspects, the pressure receiving area of the first valve member can be defined by the overlapping area of the first valve member and the valve bore.

[123] For example, in some aspects, the second predetermined value can be set to be greater than or equal to the first predetermined value.

For example, in some aspects, the second predetermined value can be set to be less than the first predetermined value.

For example, in some aspects, a portion around the communication passage of the fixed scroll member can be used as a valve seat of the pressure control valve, and the communication passage can serve as a valve hole of the pressure control valve.

[126] For example, in some aspects, the pressure control valve seat can be fitted in the communication passage ₀

[127] For example, in some aspects, the throttle valve can be a one-way valve that allows fluid to flow from the compression chamber toward the back pressure chamber.

While the various embodiments of the present disclosure have been described herein in detail, the embodiments of the invention Other variations and modifications will be apparent to those skilled in the art. All such variations and modifications are within the scope of the invention. Moreover, all of the components, components or features described herein may be replaced by other structurally and functionally equivalent components, components or features.

Claims

Claim

1. A pressure control valve (100, 200), comprising:

a valve seat (140, 260), wherein the valve seat is formed with a valve hole (142, 262);

a first valve member (110, 210), the first valve member shielding the valve bore and having fluid passages (118, 218) formed thereon;

a second valve member (120, 220) disposed between the valve seat (140, 260) and the first valve member (110, 210) and shielding the fluid passage ,

Where it is assumed that the direction from the second valve member (120, 220) to the first valve member (110, 210) is the first direction, when the first valve member (110, 210) and the When the pressure difference between the two sides of the second valve member (120, 220) is directed to the first direction and greater than or equal to a first predetermined value, the first valve member (110, 210) is opened to allow fluid flow Passing the pressure control valve; when a pressure difference between the first valve member (110, 210) and the second valve member (120, 220) points in a second direction opposite to the first direction And when greater than or equal to the second predetermined value, the second valve member (120, 220) is opened to allow fluid to flow through the pressure control valve.

2. The pressure control valve of claim 1 wherein said first valve member (110) comprises:

a first base (112) fixed relative to the valve seat;

a resilient first neck portion (114) extending from the first base portion (112);

a head (116) connected to the first neck (114),

Wherein the head (116) shields the valve bore and the fluid passage (118) is formed by at least one through bore formed in the head (116).

3. The pressure control valve of claim 2, wherein said second valve member (120) comprises:

a second base (122) fixed relative to the valve seat;

a resilient second neck portion (124) extending from the second base portion (122); a tongue (126) coupled to the second neck portion (124), the tongue portion (126) shielding the fluid passageway (118) of the first valve member (110) and capable of following the Two-way movement.

4. The pressure control valve of claim 3, wherein the area of the tongue (126) is less than the area of the head (116).

5. The pressure control valve of claim 4, wherein said second valve member (120) further comprises a peripheral portion connected to said second neck portion (124) and surrounding said tongue portion (126) ( 128) the peripheral portion (128) abuts the valve seat (140) around the valve hole (142), and

The head (116) of the first valve member (110) shields the valve bore (142) via the peripheral portion (128).

A pressure control valve according to claim 5, wherein said first predetermined value is set by setting at least one of elasticity and pressure receiving area of said first valve member (110), Said second predetermined value by setting the elasticity of said second valve member (120) and said fluid passage

Set at least one of the areas of (118).

7. The pressure control valve according to claim 6, wherein said pressure receiving area of said first valve member (110) is made by said peripheral portion (128) of said second valve member (120) and The area between the tongues (126) is defined.

8. The pressure control valve according to claim 6, wherein the elasticity of the first valve member (110) is mainly provided by the first neck portion (114), and the second valve member (120) The elasticity is primarily provided by the second neck (124).

9. The pressure control valve of any of claims 1-8, further comprising a valve stop member (130) that limits displacement of the first valve member (110) in the first direction. 10. The pressure control valve of claim 9, wherein the valve stop member (130), the first valve plate member (110), and the second valve plate member (120) pass fasteners (150) ) is fixed to the valve seat (140).

The pressure control valve according to any one of claims 1 to 4, wherein the second valve plate member (120A) and the first valve plate member (110) are formed in one body.

12. The pressure control valve of claim 1 further comprising a first resilient member (230) that provides a biasing force in the second direction for the first valve member (210) and a second valve member (220) providing a second resilient member (240) that biases in the first direction.

13. The pressure control valve of claim 12, wherein said first valve member (210) includes a body portion (212) movable relative to said valve seat and shielding said valve bore (262), and

Wherein the fluid passage (218) is formed by at least one diaphragm Li formed on the body portion (212).

The pressure control valve of claim 13 further comprising a retaining ring for retaining said first valve member (210) and said second valve member (220) in said valve seat (260)

( 250 ).

The pressure control valve according to claim 14, wherein said first elastic member (230) is disposed between said first valve member (210) and said retaining ring (250).

16. The pressure control valve of claim 15, the first valve member (210) further comprising an extension (214) extending from the body portion (212) in the second direction and from the The extension (214) protrudes from the protrusion (216).

The pressure control valve according to claim 16, wherein said second valve plate member (220) is formed with a passage through which said extension portion (214) of said first valve member (210) passes Hole (222). 18. The pressure control valve of claim 17, wherein said second resilient member (240) is disposed between said second valve member (220) and said projection (216).

The pressure control valve according to claim 15, wherein said second elastic member (240A) is disposed between said second valve member (220A) and said valve seat (260).

20. The pressure control valve of claim 15 wherein said second valve member (220B) is formed integrally with said first valve member (210B).

21. The pressure control valve of claim 20 wherein said second valve member (220B) comprises:

a base (222B) coupled to the first valve member (210B);

An elastic neck (224B) extending from the base (222B), and

At least one tongue (226B) coupled to the neck (224B), the at least one tongue shielding the at least one through hole of the first valve member (210B).

22. The pressure control valve according to claim 21, wherein said neck portion (224B) functions as said second elastic member.

The pressure control valve according to any one of claims 12 to 19, wherein the first elastic member (230) is a coil spring, and the second elastic member (240) is a resilient bracket.

The pressure control valve according to any one of claims 12 to 22, wherein the first predetermined value is set by setting elasticity of the first elastic member (230) and the first valve member (210) Setting at least one of pressure receiving areas by setting at least one of elasticity of the second elastic member (240) and an area of the fluid passage (218) set up. The pressure control valve according to claim 24, wherein a pressure receiving area of said first valve member (210) is an area of overlap of said first valve member (210) and said valve hole (262) To limit.

The pressure control valve according to claim 1, wherein said second predetermined value is set to be greater than or equal to said first predetermined value.

27. The pressure control valve of claim 1, wherein the second predetermined value is set to be less than the first predetermined value.

A scroll compressor (10) comprising: the pressure control valve (100, 200) according to any one of claims 1-27.

29. The scroll compressor of claim 28, further comprising:

a movable scroll member (70), the movable scroll member (70) includes a first end plate (72) and an orbiting scroll blade (76) formed on the first end plate;

a fixed scroll member (80), the fixed scroll member (80) including a second end plate (82) and a fixed scroll blade (86) formed on the second end plate, the fixed scroll blade (86) engaging the orbiting scroll blades (76) with each other to form a series of compression chambers therebetween, the second end plate (82) being opposite to the side on which the fixed scroll blades (86) are formed One side is formed with a recess (84), and

a seal assembly (85) disposed in the recess (84), a space between the recess (84) and the seal assembly (85) forming a back pressure chamber, the back pressure chamber via a communication passage (83) In fluid communication with one of the compression chambers,

Wherein the pressure control valve (100, 200) is disposed in the communication passage (83).

The scroll compressor according to claim 29, wherein a portion around said communication passage (83) of the fixed scroll member (80) serves as a valve seat of said pressure control valve, said communication passage (83) Used as a valve hole for the pressure control valve. The scroll compressor according to claim 29, wherein a valve seat (140, 260) of said pressure control valve (100, 200) is fitted in said communication passage (83).

32. A scroll compressor comprising:

a movable scroll member, the movable scroll member including a first end plate and an orbiting scroll blade formed on the first end plate;

a fixed scroll member, the fixed scroll member including a second end plate and a fixed scroll blade formed on the second end plate, the fixed scroll blade and the orbiting scroll blade being engaged with each other therebetween Forming a series of compression chambers, a recess of the second end plate opposite to a side on which the fixed scroll vanes are formed, and

a seal assembly disposed in the recess, a space between the recess and the seal assembly forming a back pressure chamber, the back pressure chamber being in fluid communication with one of the compression chambers via a communication passage, wherein the communication A throttle valve is provided in the passage to prevent or reduce backflow of fluid from the back pressure chamber to the compression chamber.

33. The scroll compressor of claim 32, wherein the throttle valve is a one-way valve that allows fluid to flow from the compression chamber toward the back pressure chamber.