Valve assembly for compressor and compressor

Abstract

The utility model relates to a valve assembly for a compressor and the compressor. The valve assembly comprises a valve seat and a valve cover assembly. The valve seat has a fluid passage and a mounting portion having a through hole. The valve cover assembly is used for closing and opening the fluid channel and comprises a rod part and a valve cover arranged on the top of the rod part. The rod portion is configured to be inserted into the through hole and is movable with the bonnet along a central axis of the through hole relative to the valve seat. After the compressor is shut down and exhaust is finished, the valve cover and the rod part can smoothly fall together under the action of self gravity and reverse flow, so that the valve cover can return to the valve seat to seal the fluid channel, and the risk that reverse flow gas enters a compression mechanism of the compressor through an unsealed fluid channel does not exist.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of compressor, specifically, relate to a valve assembly for compressor and compressor which make improvement in preventing compressor shutdown reverse. BACKGROUND

[0002] The content of this section only provides the background information related to the present disclosure, which may not constitute the prior art.

[0003] Compressor is the necessary component for realizing refrigeration purpose in air conditioning system. For example, for the compressor including scroll compressor mechanism, in order to obtain the refrigerant gas of expected condensing pressure, it is usually necessary to install valve assembly at the exhaust end of the compressor, on the one hand to ensure that the discharged gas has a certain pressure, and on the other hand to prevent the gas from flowing back into the scroll compressor mechanism to cause the separation of dynamic and static scroll and repeated compression of gas, which will lead to a great reduction in energy efficiency of the compressor and noise, and in severe cases, it may also cause the compressor to work abnormally.

[0004] The valve assembly in the related art mainly includes valve seat with fluid channel and valve disc for closing and opening the fluid channel. When the compressor mechanism exhausts, the valve disc originally closing the fluid channel is opened under the impact of exhaust gas flow, and after the compressor stops and the exhaust ends, in the ideal case, the valve disc will fall back to the valve seat to reseal the fluid channel and prevent the backflow of gas into the scroll compressor mechanism.

[0005] The valve assembly usually further includes valve disc limiting piece arranged above the valve disc for limiting the displacement of the valve disc. However, after the exhaust ends, in some cases, for example, due to the insufficient pressure of backflow gas flow to overcome the adsorption force of oil on the valve disc between the valve disc and the valve disc limiting piece, the valve disc will adhere to the valve disc limiting piece and cannot fall back to the valve seat to seal the fluid channel, resulting in that the backflow gas will enter the compressor mechanism through the fluid channel, affecting the operation of the compressor, and also producing the noise of shutdown reverse.

[0006] Therefore, it is necessary to provide a valve assembly which enables the valve disc to smoothly fall back to the valve seat after the compressor stops and the exhaust ends, so as to seal the fluid channel. UTILITY MODEL CONTENT

[0007] The utility model at least aims at providing a valve assembly which enables the valve cover to smoothly fall back to the valve seat after the compressor stops and the exhaust ends, so as to seal the fluid channel and prevent the backflow of gas into the compressor mechanism of the compressor.

[0008] In one aspect, the present application provides a valve assembly for a compressor, the valve assembly comprising a valve seat and a valve cover assembly. The valve seat has a fluid passage and a mounting portion, the mounting portion having a through hole. The valve cover assembly is configured to close and open the fluid passage, the valve cover assembly comprising a stem portion and a valve cover disposed at a top portion of the stem portion, wherein the stem portion is configured to be inserted into the through hole and movable along a central axis of the through hole with the valve cover relative to the valve seat.

[0009] In some embodiments, the stem portion is provided with a limiting portion at a bottom end for limiting displacement of the stem portion.

[0010] In some embodiments, the stem portion and the valve cover are formed as separate components, and the valve cover is secured to the top end of the stem portion by a fastener.

[0011] In some embodiments, an inner circumferential surface of the through hole has a first lateral plane, and an outer circumferential surface of the stem portion has a second lateral plane corresponding to the first lateral plane.

[0012] In some embodiments, an upper spring is disposed between the valve seat and the valve cover.

[0013] In some embodiments, the mounting portion further has an upper recess communicating with the through hole, the upper recess being configured to accommodate the upper spring, and an opening of the upper recess has a size larger than that of the through hole to form a step portion for retaining the upper spring.

[0014] In some embodiments, a lower spring is disposed between the valve seat and the limiting portion.

[0015] In some embodiments, the mounting portion further has a lower recess communicating with the through hole, the lower recess being configured to accommodate the lower spring, and an opening of the lower recess has a size larger than that of the through hole to form a step portion for retaining the lower spring.

[0016] In some embodiments, the stem portion is clearance fit into the through hole.

[0017] In another aspect, the present application further provides a compressor, the compressor comprising the valve assembly of the above aspect.

[0018] In some embodiments, the compressor is a scroll compressor comprising a scroll compression mechanism and a sound absorbing plate, and the valve assembly is mounted to a central hole of the sound absorbing plate.

[0019] The valve assembly for a compressor of the present application comprises a valve seat and a valve cover assembly having a valve cover and a stem portion, without a limiting portion arranged above the valve cover, the stem portion of the valve cover assembly being movable in an integral form with the valve cover. Since there is no limiting portion arranged above the valve cover, there is no risk that the valve cover will be attracted to the limiting portion after the end of the exhaust and will not fall. And, since there is no obstruction of the limiting portion, all or most of the backflow gas can directly act on the valve cover, thus maximizing the help of the backflow gas to the falling of the valve cover. In addition, the stem portion is configured to be movable with the valve cover, the stem portion increases the overall weight and helps the falling of the valve cover. Therefore, after the compressor is stopped and the exhaust is ended, the valve cover and the stem portion can smoothly fall together under the action of their own gravity and the backflow gas pressure, so that the valve cover can return to the valve seat to close the fluid passage, and there is no risk that the backflow gas enters the compression mechanism of the compressor through the unsealed fluid passage. BRIEF DESCRIPTION OF DRAWINGS

[0020] The features and advantages of embodiments of the present application will become more apparent from the following description in conjunction with the accompanying drawings. In various drawings, same or similar components are denoted by the same reference numerals. In the drawings:

[0021] Figure 1 is a longitudinal sectional view of a valve assembly for a compressor in the related art, wherein a valve plate of the valve assembly is in an open state;

[0022] Figure 2 is Figure 1 is a perspective view of a valve plate limiting member of the valve assembly in

[0023] Figure 3 is Figure 1 is another longitudinal sectional view of the valve assembly in

[0024] Figure 4 is a longitudinal sectional view of a valve assembly for a compressor according to an embodiment of the present application, wherein a valve cover of the valve assembly is in a closed state;

[0025] Figure 5 is Figure 4 is a perspective view of one embodiment of a valve seat of the valve assembly in

[0026] Figure 6 is Figure 4 is another longitudinal sectional view of the valve assembly in

[0027] Figure 7 shows Figure 6 is a perspective view of the stem portion and the valve cover of the valve assembly in

[0028] Figure 8 isFigure 6 is a perspective view of another embodiment of a valve seat of a valve assembly in

[0029] Figure 9 is Figure 8 is a top view of a valve seat in

[0030] Figure 10 is Figure 6 is a perspective view of one embodiment of a stem portion of a valve assembly in

[0031] Figure 11 is Figure 10 is a top view of a stem portion in

[0032] Figure 12 is a longitudinal sectional view of a valve assembly provided with an upper spring according to embodiments of the present application, wherein a valve cover of the valve assembly is in a closed state;

[0033] Figure 13 is Figure 12 is another longitudinal sectional view of a valve assembly in

[0034] Figure 14 is a longitudinal sectional view of a valve assembly provided with a lower spring according to embodiments of the present application, wherein a valve cover of the valve assembly is in a closed state;

[0035] Figure 15 is Figure 14 is another longitudinal sectional view of a valve assembly in

[0036] Figure 16 is a compressor comprising a valve assembly according to embodiments of the present application. DETAILED DESCRIPTION

[0037] The following description is merely exemplary in nature and is not intended to limit the present disclosure, its application or uses. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated for convenience of illustration. Specific structural and functional details disclosed herein are not to be interpreted as limiting but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to various embodiments.

[0038] In the present document, the orientation terms such as "upper", "lower", "top", "bottom" and the like are described based on the orientation shown in the corresponding drawings or the relative positional relationship between the structures when the product is habitually arranged. In actual application, the positional relationship of "upper", "lower", "top", "bottom" and the like used in the present document can be limited according to the actual situation, and these relationships can be reversed. In the present utility model, the terms "first" and "second" are only for description purposes and cannot be understood as indicating or implying relative importance.

[0039] Firstly, the structure and working principle of the valve assembly for the compressor according to the related art will be described and explained with reference to Figure 1

[0040] Figure 1 The valve assembly in the related art shown is used for example in a scroll compressor which comprises a scroll compression mechanism capable of generating high pressure gas. As shown in Figure 1 The valve assembly 1 generally comprises a valve seat 11, a valve plate 12 and a valve plate limiting member 13. The valve seat 11 has a fluid passage 111 inside, and the high pressure gas generated by the compression mechanism can be discharged outwardly to the high pressure area in the compressor via the fluid passage 111. The valve plate 12 can close and open the fluid passage 111 according to the working state of the compressor. The valve plate limiting member 13 comprises a rod portion 131 and a limiting portion 132 provided at the top of the rod portion 131. The valve seat 11 has a mounting hole, and the valve plate 12 has a central hole. The rod portion 131 is configured to be inserted into the aligned mounting hole and central hole and fixedly mounted in the valve seat 11 by means of the mounting hole, i.e. the rod portion 131 cannot move along the central axis Y1 of the mounting hole relative to the valve seat. The valve plate 12 is configured to be movable along the central axis Y1 relative to the valve seat 11. The limiting portion 132 is used to limit the displacement of the valve plate 12 between the valve seat 11 and the limiting portion 132, and when the valve plate 12 moves to contact the limiting portion 132, the valve plate 12 cannot continue to move upward due to the blocking effect of the limiting portion, at which time the displacement of the valve plate 12 reaches the maximum.

[0041] Figure 1 The valve plate of the valve assembly in the related art is shown in the open state. When the compression mechanism of the compressor discharges, as shown in Figure 1 The valve plate 12 originally closing the fluid passage 111 is impacted by the discharge gas flow A and floats up, so that the valve plate is opened to allow the gas to be discharged. When the discharge ends, the previously floated valve plate 12 falls back onto the valve seat due to the loss of the effect of the discharge pressure, thereby re-closing the fluid passage 111.

[0042] Figure 2 A perspective view of the valve plate limiting member of the valve assembly in the related art is shown. As shown in Figure 2 ​As shown, the limiting portion 132 of the valve plate limiting member 13 has a vent hole 133. Through this construction, as... Figure 3 As shown, after the exhaust is complete, a portion of the backflow airflow B can act on the valve plate 12 through the vent 133, which helps the valve plate fall. However, due to the obstruction of the limiting part 132 above the valve plate 12, only a portion of the backflow airflow B can act on the valve plate 12, thus limiting the assistance of the backflow airflow in helping the valve plate fall. Ideally, the valve plate falls back onto the valve seat under the action of the backflow air pressure and its own weight to close the fluid passage. However, in some cases, the sum of the backflow air pressure acting on the valve plate and the valve plate's own weight may not be enough to overcome the oil adsorption force on the valve plate. This causes the valve plate to adhere to the bottom surface of the limiting part and fail to fall back onto the valve seat, thus failing to prevent backflow gas from entering the compressor's compression mechanism and also generating noise from the shutdown and reversal.

[0043] To address the aforementioned technical problems of valve assemblies in related technologies, this application provides a valve assembly for a compressor. The following will refer to... Figures 4 to 6 This document describes and illustrates the structure and working principle of the valve assembly according to embodiments of this application.

[0044] Figure 4 A longitudinal sectional view of a valve assembly for a compressor according to an embodiment of this application is shown, wherein the valve cover of the valve assembly is in the closed state. Figure 5 It shows Figure 4 A three-dimensional view of the valve seat of the valve assembly. Figure 6 It shows Figure 4 Another longitudinal sectional view of the valve assembly, in which the valve cover of the valve assembly is in the open position.

[0045] like Figure 4 As shown, valve assembly 2 includes a valve seat 21 and a valve cover assembly 22. The valve seat 21 has a fluid passage 211 and a mounting portion 212. High-pressure gas generated by the compression mechanism can be discharged externally through the fluid passage 211. Figure 5 As shown, the mounting portion 212 has a through hole 213 for retaining the valve cover assembly 22. The valve cover assembly 22 is capable of opening and closing the fluid passage 211 according to the operating state of the compressor. The valve cover assembly 22 includes a rod portion 221 and a valve cover 222 disposed at the top of the rod portion 221 (specifically, the tip of the rod portion). The rod portion 221 is configured to be inserted into the through hole 213 and is movable along the central axis Y2 of the through hole 213 relative to the valve seat 21 together with the valve cover 222. As described above, in related technologies, the rod portion is fixed in the valve seat and cannot move. In contrast, in this embodiment, the rod portion and the valve cover are movable relative to the valve seat in an integral manner.

[0046] like Figure 6As shown, under the impact of the exhaust gas flow A, the valve cover 222 moves along the central axis Y2 relative to the valve seat 21 together with the stem 221, and thus the valve cover is opened to allow the gas to be exhausted.

[0047] Referring again to Figure 4 After the compressor is stopped and the exhaust is finished, all or most of the backflow gas flow B can directly act on the valve cover 222 without any obstruction. Under the joint action of the backflow gas pressure and the gravity of the valve cover and the stem itself, the valve cover and the stem can smoothly fall together, so that the valve cover returns to the valve seat and re-closes the fluid passage 211 to prevent the backflow gas from entering the compression mechanism of the compressor.

[0048] The valve assembly according to the embodiments of the present application does not have a limiting portion above the valve cover as in the related art, and thus there is no risk that the valve plate is adsorbed on the limiting portion after the exhaust is finished and cannot fall. Moreover, since there is no obstruction of the limiting portion, all or most of the backflow gas can directly act on the valve cover, thus maximizing the help of the backflow gas to the falling of the valve cover. In addition, the stem is configured to move together with the valve cover, and the stem increases the overall weight, which helps the falling of the valve cover. Therefore, after the exhaust of the compressor is finished, the valve cover and the stem can smoothly fall together under the action of the gravity and the backflow gas pressure, so that the valve cover can return to the valve seat to close the fluid passage, and there is no risk that the backflow gas enters the compression mechanism of the compressor through the unsealed fluid passage.

[0049] In order to be able to limit the displacement of the movement of the valve cover, as Figure 4 and Figure 6 shown, the stem 221 can be provided with a limiting portion 223 at the bottom end. The limiting portion 223 has a size in the transverse direction (i.e. the radial direction of the through hole 213) greater than the size of the through hole 213, so as to form an engagement portion abutting against the mounting portion 212, thereby limiting the movement of the valve cover and the stem. As Figure 6 shown, under the impact of the exhaust gas flow A, the valve cover 222 and the stem 221 move upward along the central axis Y2 together until the limiting portion 223 of the stem 221 moves to abut against the bottom surface of the mounting portion 212, at which time the valve cover 222 and the stem 221 can no longer continue to move upward, and the displacement S is the maximum displacement of the valve cover.

[0050] As an implementation manner, as Figure 7As shown, the bonnet 222 and the stem 221 can be manufactured as two separate components and can be connected together by means of fasteners 23, for example, the bonnet 222 and the stem 221 can be connected by means of bolts. The stem 221 can have a passage for receiving the bolts inside and the passage can have internal threads on the inner wall that engage with the external threads of the bolts. The bonnet can have a central hole. In assembly, the central hole of the bonnet is aligned with the passage of the stem and the bonnet is then connected with the stem by means of threaded fit using the bolts.

[0051] In the case where the bonnet 222 and the stem 221 are manufactured as two separate components, the stopper 223 can be manufactured as a single component integral with the stem 221. In assembly, the integral stopper and stem can be first installed in the through hole of the mounting portion and then the bonnet is secured to the top end of the stem using fasteners.

[0052] As another embodiment, the bonnet 222 and the stem 221 can also be manufactured as a single component integral with each other (not shown in the drawings), whereby the fasteners for connecting the two together can be dispensed with. In the case where the bonnet 222 and the stem 221 are manufactured as a single component integral with each other, the stopper 223 is manufactured as two separate components from the stem 221. The stopper 223 can be secured to the bottom end of the stem 221 by means of any suitable means, such as threaded fastening or welding or adhesive means. In assembly, the integral bonnet and stem can be first installed in the through hole of the mounting portion and then the stopper is secured to the bottom end of the stem using fasteners.

[0053] In the process of securing the bonnet to the stem using fasteners, the stem is prone to radial rotation in the through hole, which hinders installation. To avoid the above situation, the present embodiment provides a configuration of the mounting portion and the stem, which will be described below with reference to Figures 8 to 11 .

[0054] Figure 8 A perspective view of a valve seat of a valve assembly according to an embodiment of the present application is shown, wherein the through hole of the valve seat has a first lateral plane. Figure 9 is Figure 8 a top view of the valve seat in Figure 10 . A perspective view of a stem of a valve assembly according to an embodiment of the present application is shown, wherein the stem has a second lateral plane. Figure 11 is Figure 10 a top view of the stem in

[0055] As Figure 8 and Figure 9 shown, the inner circumferential surface of the through hole 213 has a first lateral plane 214. Correspondingly, as Figure 10 and Figure 11 shown, the outer circumferential surface of the stem 221 has a second lateral plane 222.As shown, the outer circumferential surface of the stem portion 221 has a second lateral plane 215. When the stem portion 221 is assembled into the through hole 213 of the valve seat 21, the second lateral plane 215 of the stem portion 221 is made to be opposite and aligned with the first lateral plane 214 of the through hole 213. With this configuration, on the one hand, when the bolt is tightened to fix the valve cover on the stem portion, the stem portion cannot rotate within the through hole about the central axis of the through hole due to the existence of the first lateral plane and the second lateral plane, thus facilitating the fixation of the valve cover to the stem portion, and on the other hand, the rotation of the valve cover assembly can also be avoided when the valve cover assembly moves up and down during the operation of the compressor, thus making the movement of the valve cover assembly up and down more smooth. For example, as shown in Figure 9 As shown, the inner circumferential surface of the through hole 213 can have two opposite first lateral planes 214 along the radial direction of the through hole, and correspondingly, as shown in Figure 11 As shown, the outer circumferential surface of the stem portion 221 can have two second lateral planes 215 radially opposite along the circumferential direction of the stem portion.

[0056] In order to make the opening of the valve cover and the closing of the valve cover more smooth, the valve assembly according to the embodiments of the present application is provided with a spring structure. The spring structure will be described below with reference to Figures 12 to 15 .

[0057] Figure 12 A longitudinal sectional view of the valve assembly according to the embodiments of the present application provided with an upper spring is shown, in which the valve cover of the valve assembly is in a closed state. Figure 13 Another longitudinal sectional view of the valve assembly in Figure 12 is shown, in which the valve cover of the valve assembly is in an open state.

[0058] As shown in Figure 12 , an upper spring 24 is arranged between the valve seat 21 and the valve cover 222, the upper spring 24 is arranged to pass through and be sleeved on the stem portion 221, and there is a gap between the upper spring 24 and the stem portion 221, so that the stem portion 221 can move freely along the central axis Y2 relative to the upper spring 24. As shown in Figure 12 , the mounting portion 212 of the valve seat can have an upper groove 25 for accommodating the upper spring 24. The upper groove 25 is in communication with the through hole 213 in the longitudinal direction (i.e. the direction along the central axis Y2), and the size of the opening of the upper groove 25 is greater than the size of the through hole 213, so as to form a stepped portion for retaining the upper spring 24.

[0059] Referring to Figure 12 , at this time the valve cover 222 is in a closed state, one end of the upper spring 24 abuts against the valve cover 222, the other end abuts against the bottom surface of the upper groove 25, and the upper spring 24 as a whole is in a compressed state, thus there is an elastic potential energy for restoring to the original state. As shown in Figure 13As shown, in the process that the valve cover 222 is gradually floated by the impact of the exhaust gas flow A from below, the upper spring 24 is also gradually restored. The upper spring 24 releases the elastic potential energy in the process of restoring, and exerts an upward force F1 on the valve cover 222, which helps the opening of the valve cover 222.

[0060] It should be noted that although the presence of the upper spring may hinder the falling of the valve cover, the hindrance is small compared to the help of the upper spring to the opening of the valve cover, and can be eliminated or reduced as much as possible by reasonably selecting the type and spring coefficient of the upper spring and / or by reasonably setting the axial size of the upper groove so that the upper spring has a suitable compression degree. In this application, compared with the related art scheme of only setting the valve plate to move up and down, the valve cover assembly of the embodiment of the application includes a rod part and a valve cover that move integrally, so that the overall weight is correspondingly increased. In this case, it is advantageous to set the upper spring, which can make the valve cover open more smoothly, and at the same time, by selecting the upper spring with a suitable spring coefficient and / or making the upper spring be compressed to a suitable degree, the valve cover can also be closed smoothly under the action of the valve cover assembly and the backflow gas flow.

[0061] Figure 14 A longitudinal sectional view of a valve assembly provided with a lower spring according to the embodiment of the application is shown, in which the valve cover of the valve assembly is in a closed state. Figure 15 Another longitudinal sectional view of the valve assembly in Figure 14 is shown, in which the valve cover of the valve assembly is in an open state.

[0062] As Figure 14 shown, a lower spring 26 is arranged between the valve seat 21 and the limiting part 223, the lower spring 26 is arranged to pass through and be sleeved on the rod part 221, and there is a gap between the lower spring 26 and the rod part 221, so that the rod part 221 can move freely along the central axis Y2 relative to the lower spring 26. The mounting part 212 can have a lower groove 27 for accommodating the lower spring 26. The lower groove 27 communicates with the through hole 213 in the longitudinal direction, and the size of the opening of the lower groove 27 is larger than the size of the through hole 213, so as to form a step part for retaining the lower spring 26. Referring to Figure 15 At this time, the valve cover 222 is in an open state, one end of the lower spring 26 abuts against the limiting part 223, the other end abuts against the bottom surface of the lower groove 27, and the lower spring 26 is in a compressed state as a whole, so there is an elastic potential energy of restoring. Referring again to Figure 14After the end of the exhaust, the valve cover 222 and the stem 221 fall together under the action of the backflow B and their own gravity, and at the same time, the compressed lower spring 26 gradually recovers its original state. In the process of recovering its original state, the lower spring 26 releases the elastic potential energy and exerts a downward force F2 on the stem 221, which helps the falling of the valve cover 222.

[0063] It should be noted that although the presence of the lower spring may hinder the opening of the valve cover, the hindrance is small compared to the help of the lower spring to the falling of the valve cover, and similar to the description of the upper spring above, the hindrance can be eliminated or reduced as much as possible by reasonably selecting the type and spring coefficient of the lower spring and the like. In general, according to the present application, the setting of the upper spring or the lower spring, the selection of the spring type, and the determination of the compression degree of the spring can be determined according to the specific circumstances, such as the pressure of the high-pressure fluid expected to be generated by the compression mechanism, the weight of the valve cover assembly, and / or the pressure of the expected backflow fluid.

[0064] In the embodiment of the present application, the stem 221 is clearance-fitted into the through hole 213 of the valve seat 21, so that the stem 221 can smoothly move up and down along the central axis Y2 together with the valve cover 222.

[0065] The valve assembly of the embodiment of the present application is used in a compressor, for example, a scroll compressor.

[0066] The present application also provides a compressor, in particular a scroll compressor, comprising the valve assembly according to the above various embodiments. Figure 16 A longitudinal sectional view of a compressor according to an embodiment of the present application is shown in FIG. 3. Figure 16 As shown, the compressor 3 comprises the valve assembly 2 according to the above embodiments, and the compressor 3 is, for example, a scroll compressor. The scroll compressor comprises a scroll compression mechanism (not shown in the figure) and a soundproof plate (also known as a partition plate and not shown in the figure). The scroll compression mechanism can generate high-pressure gas. The soundproof plate is used to separate the internal space of the compressor into a high-pressure area and a low-pressure area. The soundproof plate has a central hole, and for example, the valve seat 21 of the valve assembly 2 can be installed at the central hole of the soundproof plate. Thus, when the compressor is running, the valve cover 222 can be opened to allow the high-pressure fluid compressed by the compression mechanism to enter the high-pressure area. After the compressor is stopped and the exhaust is completed, the valve cover and the stem of the valve assembly 2 can smoothly fall together under the action of their own gravity and the backflow gas flow from the high-pressure area, so that the valve cover can return to the valve seat to close the fluid passage, and there is no risk of backflow gas entering the compression mechanism of the compressor through the unsealed fluid passage.

[0067] Furthermore, it is noted that the present application allows for various modifications. For example, although the valve assembly of the present application is described herein by way of example only as being used in a scroll compressor, it is contemplated that the valve assembly of the present application can also be used in other suitable types of compressors (e.g., a rotary compressor). As another example, although the valve cover assembly is specifically described and shown in some embodiments as having a stop portion of a particular structure and disposed position, it is contemplated that the present application is not limited to such a stop portion, e.g., in other embodiments, the compressor can be provided with a protrusion extending downwardly from the top housing of the compressor that can abut against the valve cover assembly so as to be adapted to limit displacement of the valve cover assembly.

[0068] While various embodiments of the present application have been described in detail herein, it is to be understood that the application is not limited to the particular embodiments disclosed herein. It is contemplated that other embodiments and modifications will occur to those skilled in the art having the benefit of the present disclosure, and such embodiments and modifications are understood to be within the scope of the present application. It is therefore understood that the application will be open to various modifications and various embodiments, all without departing from the spirit or scope of the following claims.

Claims

1. A valve assembly for a compressor, characterized by, The valve assembly includes: a valve seat having a fluid passage and a mounting portion having a through-hole; and a valve cover assembly for closing and opening the fluid passage, the valve cover assembly including a stem portion and a valve cover provided at a top of the stem portion, wherein the stem portion is configured to be inserted into the through-hole and movable along a central axis of the through-hole with the valve cover relative to the valve seat.

2. The valve assembly of claim 1, wherein, The stem portion is provided at a bottom end thereof with a stop portion for limiting displacement of the stem portion.

3. Valve assembly according to claim 1 or 2, characterized in that The stem portion and the valve cover are formed as separate components, respectively, and the valve cover is fixed to a top end of the stem portion by a fastener.

4. The valve assembly of claim 3, wherein, An inner circumferential surface of the through-hole has a first lateral plane, and an outer circumferential surface of the stem portion has a second lateral plane corresponding to the first lateral plane.

5. The valve assembly of claim 1 or 2, wherein, An upper spring is provided between the valve seat and the valve cover.

6. The valve assembly of claim 5, wherein, The mounting portion further has an upper recess communicating with the through-hole, the upper recess being for accommodating the upper spring, and an opening of the upper recess has a size greater than that of the through-hole to form a step portion for retaining the upper spring.

7. The valve assembly of claim 2, wherein, A lower spring is provided between the valve seat and the stop portion.

8. The valve assembly of claim 7, wherein, The mounting portion further has a lower recess communicating with the through-hole, the lower recess being for accommodating the lower spring, and an opening of the lower recess has a size greater than that of the through-hole to form a step portion for retaining the lower spring.

9. The valve assembly of claim 1 or 2, wherein, The stem portion is clearance-fitted into the through-hole.

10. A compressor characterized by, The compressor includes the valve assembly according to any one of claims 1 to 9.

11. The compressor of claim 10, wherein, The compressor is a scroll compressor including a scroll compression mechanism and a sound deadening plate, and the valve assembly is mounted to a central hole of the sound deadening plate.

Images