CN114542757B

CN114542757B - Reversing valve and refrigerating system

Info

Publication number: CN114542757B
Application number: CN202011328292.3A
Authority: CN
Inventors: 张克鹏
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2024-03-22
Anticipated expiration: 2040-11-24
Also published as: CN114542757A

Abstract

The invention relates to a reversing valve and a refrigerating system, wherein the reversing valve comprises a first connecting pipe and a valve body, the first connecting pipe is provided with a first channel, the valve body is provided with a first inner cavity, the first channel is communicated with the first inner cavity, and high-pressure fluid can enter the first inner cavity from the first channel. The reversing valve further comprises a buffer element and a flow guiding element, the buffer element is arranged at one end of the first connecting pipe, which is close to the valve body, and separates the first channel from the first inner cavity, one or more through holes which are communicated with the first channel and the first inner cavity are formed in the buffer element, the flow guiding element is arranged at one side, which is close to the first inner cavity, of the buffer element, and the flow guiding element can change the flow direction of high-pressure fluid passing through the through holes. The reversing valve provided by the invention effectively solves the problem of large noise generated in the reversing process of the reversing valve in the prior art.

Description

Reversing valve and refrigerating system

Technical Field

The invention relates to the technical field of valve bodies, in particular to a reversing valve and a refrigerating system.

Background

The reversing valve is arranged in the refrigerating system and used for realizing the switching of pipelines. The reversing valve comprises a valve body, a slide valve component and a valve seat, wherein the valve body is provided with a first inner cavity, and the slide valve component and the valve seat are arranged in the first inner cavity. The reversing valve further comprises a first connecting pipe, wherein the first connecting pipe is provided with a first channel, and the first channel is communicated with the first inner cavity. During reversing of the reversing valve, the spool valve assembly will slide relative to the valve seat. And, the first connecting pipe connects the compressor discharge port, there is high-pressure fluid to strike the slide valve assembly in the first passageway, make the slide valve assembly bear the great pressure in the slip. In addition, according to the relation between the sliding friction force and the pressure, it is known that a large sliding friction force is generated between the sliding valve assembly and the valve seat during the sliding of the sliding valve assembly. The greater sliding friction force may cause the spool valve assembly to generate greater noise during friction with the valve seat.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a reversing valve and a refrigeration system, which solve the problem of large noise generated in the reversing process of the reversing valve in the prior art.

The invention provides a reversing valve which comprises a first connecting pipe and a valve body, wherein the first connecting pipe is provided with a first channel, the valve body is provided with a first inner cavity, the first channel is communicated with the first inner cavity, and high-pressure fluid can enter the first inner cavity from the first channel. The reversing valve further comprises a buffer element and a flow guiding element, the buffer element is arranged at one end of the first connecting pipe, which is close to the valve body, and separates the first channel from the first inner cavity, one or more through holes which are communicated with the first channel and the first inner cavity are formed in the buffer element, the flow guiding element is arranged at one side, which is close to the first inner cavity, of the buffer element, and the flow guiding element can change the flow direction of high-pressure fluid passing through the through holes.

In an embodiment of the invention, the flow guiding element includes one or more flow guiding sheets, and along an axial direction of the first connecting tube, a projection of the flow guiding sheet on a surface of the buffer element, which is close to the flow guiding sheet, can cover the through hole. The high-pressure fluid ejected from the through hole is blocked on the guide vane along the axial direction of the first connecting pipe, so that the high-pressure fluid cannot continue to be ejected forward, but flows toward the gap between the guide vane and the buffer member, and thus cannot directly impact the spool valve assembly. By the arrangement, the flow guiding element can effectively block high-pressure fluid ejected from the through hole.

In an embodiment of the invention, the guide vane includes a stop segment and a connecting segment connecting the stop segment and the buffer element, one end of the stop segment is connected with the connecting segment, the other end extends towards a direction away from the connecting segment and a central axis of the first connecting tube, and the stop segment and the buffer element are arranged at intervals. The structure of the guide vane is simpler, the processing and the manufacturing of the guide vane are facilitated, and the production cost of the reversing valve is reduced.

In one embodiment of the invention, the angle between the stop section and the plane perpendicular to the axis of the first connecting tube is-30 ° to +30°. The negative sign indicates that the direction in which the stopper section extends is toward the direction approaching the cushioning element, and the positive sign indicates that the direction in which the stopper section extends is toward the direction separating from the cushioning element. So set up, can prevent effectively that the contained angle between the plane of backstop section and perpendicular to first connecting pipe axis from being too big, lead to backstop section contact spool valve subassembly, influence the normal work of switching-over valve. Or, can prevent effectively that the contained angle between backstop section and the plane perpendicular to first connecting pipe axis from being too little, lead to backstop section contact buffer element, influence high-pressure fluid and get into first inner chamber.

In an embodiment of the invention, the reversing valve further includes a slider and a valve seat, the valve seat is disposed in the valve body, the slider is disposed on the valve seat and can slide on the valve seat, and one end of the flow guiding element, which is far away from the buffering element, is disposed at a distance from the slider. By the arrangement, the guide element can be prevented from contacting the sliding block to influence the normal sliding of the sliding block.

In an embodiment of the invention, a flow area of the one through hole or a sum of flow areas of the plurality of through holes is smaller than a cross-sectional area of the first channel. In this way, the buffer element reduces the amount of the high-pressure fluid ejected from the first passage, further reducing the flow rate of the high-pressure gas.

In an embodiment of the present invention, the cross section of the through hole is circular, elliptical or polygonal, so that the through hole is convenient for processing and forming.

In an embodiment of the invention, the buffer element is in a barrel shape with an opening at one side, the opening faces away from the valve body, and the opening of the buffer element is connected with the inner wall of the first connecting pipe. The cushioning element includes a side wall and a bottom wall. The through hole can be arranged on the side wall; alternatively, the through hole may be provided in the bottom wall; or the through holes can be formed in both the side wall and the bottom wall. The flow guiding element is arranged on the bottom wall of the buffer element. Therefore, the surface area of the buffer element is effectively enlarged, so that the distribution of the through holes on the surface of the buffer element can be more dispersed, namely, the throttling buffer effect of the buffer element is more obvious.

In an embodiment of the invention, the buffer element has a disc shape. By the arrangement, the structure of the buffer element is simplified, and meanwhile, materials are saved.

The invention also provides a refrigeration system comprising the reversing valve according to any one of the embodiments.

The reversing valve and the refrigerating system provided by the invention are characterized in that one end of a first connecting pipe, which is close to a valve body, is provided with a buffer element for separating a first channel from a first inner cavity, and the buffer element is provided with one or more through holes for communicating the first channel with the first inner cavity. The flow rate of the high-pressure fluid decreases due to the blocking effect of the buffer element. And a flow guiding element is arranged on one side of the buffer element, which is close to the first inner cavity, and the flow guiding element can change the flow direction of the high-pressure fluid passing through the through hole. The flow direction of the high-pressure fluid passing through the through hole is changed by the flow guiding element, so that the slide block is prevented from being directly impacted by the high-pressure fluid. Therefore, in summary, the pressure applied to the spool valve assembly is reduced, so that the problem of high noise generated in the reversing process of the reversing valve in the prior art is effectively solved.

Drawings

FIG. 1 is a cross-sectional view of a reversing valve according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a buffering element with a flow guiding element according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a buffer element according to an embodiment of the present invention;

FIG. 4 is a schematic view of a buffer element according to another embodiment of the present invention;

FIG. 5 is a schematic view of a buffer element according to another embodiment of the present invention;

fig. 6 is a schematic structural view of a cushioning element according to another embodiment of the present invention.

Reference numerals: 1. a first connection pipe; 11. a first channel; 2. a valve body; 21. a first lumen; 3. a buffer element; 31. a through hole; 32. an opening; 33. a protrusion; 34. a sidewall; 35. a bottom wall; 4. a second lumen; 5. a spool valve assembly; 51. a slide block; 511. a receiving groove; 52. a connecting rod; 6. a valve seat; 7. a second connection pipe; 71. a second channel; 8. a third connection pipe; 81. a third channel; 9. a fourth connection pipe; 91. a fourth channel; 100. a flow guiding element; 110. a deflector; 111. a stop section; 112. and a connecting section.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.

It is noted that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The invention provides a reversing valve, which is applied to switching between different pipelines in a refrigeration system. In this embodiment, the reversing valve is a four-way reversing valve, and in other embodiments, the reversing valve may be a five-way reversing valve, a six-way reversing valve, or other types of reversing valves.

Referring to fig. 1 and 2, the reversing valve includes a valve body 2 and a spool valve assembly 5, a valve seat 6 is disposed in the valve body 2, the spool valve assembly 5 is disposed on the valve seat 6, the valve body 2 has a first inner cavity 21, the spool valve assembly 5 is disposed in the first inner cavity 21, and the spool valve assembly 5 is capable of sliding in the first inner cavity 21.

Specifically, the valve body 2 is connected with a first connecting pipe 1, the first connecting pipe 1 is provided with a first channel 11, and the first channel 11 is communicated with a first inner cavity 21. It should be noted that, in this embodiment, the first connection pipe 1 is connected to a discharge end of a compressor (not shown) in the refrigeration system, and in other embodiments, the first connection pipe 1 may be connected to other devices according to different uses of the reversing valve.

In this embodiment, the valve body 2 is further connected to a second connecting pipe 7, a third connecting pipe 8 and a fourth connecting pipe 9, the second connecting pipe 7 is provided with a second channel 71, the third connecting pipe 8 is provided with a third channel 81, and the fourth connecting pipe 9 is provided with a fourth channel 91. The second, third and fourth connection pipes 7, 8 and 9 respectively penetrate the valve seat 6, and the spool valve assembly 5 slides within the valve body 2 to selectively communicate the second and third passages 71 and 81 or the third and fourth passages 81 and 91. The second connection pipe 7 is connected to an evaporator (not shown) in the refrigeration system, the third connection pipe 8 is connected to an intake port of the compressor, and the fourth connection pipe 9 is connected to a condenser (not shown). In other embodiments, the valve body 2 may be further connected to a fifth connection pipe, which is connected to another heat exchanger, the first connection pipe 1 or another location, and other connection pipes may be further connected to the valve body 2 according to different uses of the reversing valve.

Further, the slide valve assembly 5 includes a slide block 51 and a connecting rod 52, the slide block 51 is fixed on the connecting rod 52, a receiving groove 511 is formed on one side of the slide block 51 far away from the first channel 11, the receiving groove 511 and the valve seat 6 form a second inner cavity 4, the second inner cavity 4 can be communicated with the second channel 71 and the third channel 81, or the second inner cavity 4 can be communicated with the third channel 81 and the fourth channel 91, and the first inner cavity 21 and the second inner cavity 4 are always isolated from each other and are not communicated with each other.

In the present embodiment, when the refrigeration system is in the heating mode, the second passage 71, the second inner chamber 4 and the third passage 81 are communicated, and the first passage 11 is communicated with the fourth passage 91 through the first inner chamber 21; when the heating system needs to be switched to the cooling mode, the spool valve assembly 5 slides, the third passage 81, the second inner chamber 4 and the fourth passage 91 communicate, and the first passage 11 communicates with the second passage 71 through the first inner chamber 21.

In the existing reversing valve, when the reversing valve is used for reversing, the first channel is connected with the exhaust port of the compressor, the pressure is high, the friction force between the sliding block and the valve seat can be increased due to the fact that the sliding block receives high-pressure fluid in the sliding process of the sliding block, particularly when the sliding block is located right below the first channel, the received pressure is maximum, and the generated noise problem is more serious.

The invention sets a buffer element 3 separating the first channel 11 and the first inner cavity 21 at one end of the first connecting pipe 1 near the valve body 2, and the buffer element 3 is provided with one or more through holes 31 communicating the first channel 11 and the first inner cavity 21. The flow rate of the high-pressure fluid decreases due to the blocking effect of the buffer element 3. And a flow guiding member 100 is provided at a side of the buffering member 3 adjacent to the first inner chamber 21, and the flow guiding member 100 is capable of changing a flow direction of the high pressure fluid passing through the through-hole 31. The flow guiding element 100 changes the flow direction of the high pressure fluid passing through the through hole 31, thereby preventing the slider 51 from being directly impacted by the high pressure fluid. That is, the slider 51 is prevented from being subjected to a forward impact of the high-pressure fluid, and the flow guiding member 100 is capable of guiding at least part of the high-pressure fluid to the outside of the slider 51 without directly contacting the slider 51, thereby reducing the pressure to which the slider 51 is subjected. Therefore, in summary, the pressure applied to the spool valve assembly 5 is also reduced, so that the problem of high noise generated in the reversing process of the reversing valve in the prior art is effectively solved.

In an embodiment, as shown in fig. 1 and 2, the flow guiding element 100 comprises one or more flow guiding fins 110, and along the axial direction of the first connecting tube 1, the projection of the flow guiding fin 110 onto the surface of the buffer element 3 close to the flow guiding fin 110 can cover the through hole 31, that is, the through hole 31 is located in the projection of the flow guiding fin 110 onto the surface of the buffer element 3 close to the flow guiding fin 110. The high-pressure fluid ejected from the through hole 31 is blocked against the guide vane 110 along the axial direction of the first connecting pipe 1, so that the high-pressure fluid cannot continue to be ejected forward, but flows toward the gap between the guide vane 110 and the shock absorbing element 3, and thus cannot directly impact the spool valve assembly 5. So arranged, the flow guiding element 100 is able to effectively block the high pressure fluid ejected from the through hole 31.

In an embodiment, as shown in fig. 1 and 2, the guide vane 110 includes a stop section 111 and a connection section 112 connecting the stop section 111 and the buffer element 3, one end of the stop section 111 is connected to the connection section 112, the other end extends towards a direction away from the connection section 112 and away from a central axis of the first connection tube 1, and the stop section 111 and the buffer element 3 are disposed at intervals. The structure of the guide vane 110 is simpler, the guide vane 110 is beneficial to processing and manufacturing, and the production cost of the reversing valve is reduced. The connecting section 112 is arc-shaped, the surface of the stop section 111, which is close to the buffer element 3, is a plane, the arc-shaped connecting section 112 plays a role in guiding high-pressure fluid, and the plane stop section 111 can reduce the flow loss of the high-pressure fluid.

The stop section 111 and the connecting section 112 are formed by bending the guide vane 110, and the process is simple.

In an embodiment, as shown in fig. 1 and 2, the angle between the stop segment 111 and the plane perpendicular to the axis of the first connecting tube 1 is-30 ° to +30°. The negative sign indicates that the direction in which the stopper section 111 extends is toward the direction approaching the cushioning element 3, and the positive sign indicates that the direction in which the stopper section 111 extends is toward the direction separating from the cushioning element 3. By this arrangement, the stop segment 111 can be effectively prevented from being excessively large in the included angle with the plane perpendicular to the axis of the first connecting pipe 1, so that the stop segment 111 contacts the slide valve assembly 5, and the normal operation of the reversing valve is affected. Alternatively, it is possible to effectively prevent the angle between the stop segment 111 and the plane perpendicular to the axis of the first connecting tube 1 from being too small, which would result in the stop segment 111 contacting the damping element 3, affecting the entry of high-pressure fluid into the first lumen 21. Preferably, in the present embodiment, two flow deflectors 110 are provided, the two flow deflectors 110 form a herringbone shape, one ends of the two flow deflectors 110 are connected to the buffer element 3, the other ends extend towards opposite directions, and the stop section 111 is parallel to a plane perpendicular to the axis of the first connecting tube 1, so that high-pressure fluid can be guided to a place farther from the sliding block 51, and the flow loss of the high-pressure fluid can be reduced. In this embodiment, the two guide vanes 110 have equal height, equal width and equal thickness, and are symmetrically disposed, and in other embodiments, the guide vanes 110 may be one, three or more, and the dimensions of the two guide vanes 110 may be different, or the extending directions thereof may be different.

In one embodiment, as shown in fig. 1 and 2, the slider 51 is disposed on the valve seat 6 and is capable of sliding on the valve seat 6, and the end of the flow guiding element 100 remote from the cushioning element 3 is disposed at a distance from the slider 51. By this arrangement, the guide member 100 can be prevented from contacting the slider 51 to affect the normal sliding of the slider 51.

In one embodiment, as shown in fig. 2-6, the flow area of one through hole 31 or the sum of the flow areas of multiple through holes 31 is smaller than the cross-sectional area of the first channel 11. In this way, the buffer element 3 reduces the amount of the high-pressure fluid ejected from the first passage 11, further reducing the flow rate of the high-pressure gas.

Further, the cross section of the through hole 31 is circular, elliptical or polygonal, so that the through hole 31 is convenient to be formed. But is not limited thereto, the cross section of the through hole 31 may be in other shapes such as a ring shape, a cone shape, etc.

In an embodiment, as shown in fig. 3, 4 and 5, the damping element 3 has a barrel shape with an opening 32 on one side, the opening 32 facing away from the valve body 2, the opening 32 of the damping element 3 being connected to the inner wall of the first connecting tube 1. The cushioning element 3 comprises a side wall 34 and a bottom wall 35. The through hole 31 may be provided in the sidewall 34; alternatively, the through hole 31 may be provided in the bottom wall 35; alternatively, the through holes 31 may be provided in both the side walls 34 and the bottom wall 35. The flow guiding element 100 is arranged at the bottom wall of the cushioning element 3. In this way, the surface area of the buffer element 3 is effectively enlarged, so that the distribution of the through holes 31 on the surface of the buffer element 3 can be more dispersed, that is, the throttling buffer effect of the buffer element 3 is more obvious.

In an embodiment, as shown in fig. 3, 4 and 5, a protrusion 33 is disposed at the opening 32 of the buffer element 3, and a groove (not shown) is correspondingly disposed on the inner wall of the first connecting tube 1, where the protrusion 33 is clamped to the groove. Therefore, the buffer element 3 can be clamped at the groove of the first connecting pipe 1 through the bulge 33, so that the assembly difficulty of the reversing valve is reduced, and the disassembly is convenient.

In other embodiments, the buffer element 3 is welded to the inner wall of the first connecting tube 1 to strengthen the connection strength between the buffer element 3 and the first connecting tube 1, so as to avoid the buffer element 3 from being flushed away from the end of the first connecting tube 1 near the valve body 2 by high-pressure fluid. Or, the buffer element 3 is detachably connected to the first connecting pipe 1 through the fastener, and if the through hole 31 in the buffer element 3 is blocked by the medium, the buffer element 3 can be conveniently removed and cleaned. So arranged, the degree of firmness of the assembly of the cushioning element 3 is improved.

In one embodiment, as shown in fig. 3, the buffer element 3 has a truncated cone shape, and the bottom wall 35 is disposed at an end of the buffer element 3 having a smaller outer diameter. This arrangement enables the through holes 31 to be distributed over the side walls 34 or the bottom wall 35 of the cushioning element 3, or over both the side walls 34 and the bottom wall 35 of the cushioning element 3. Thus, the cushioning effect is further enhanced. And the outer diameter of the end of the buffer element 3 remote from the first channel 11 is smaller, which allows for material saving.

In one embodiment, as shown in fig. 4, the buffer element 3 has a truncated cone shape, and the bottom wall 35 is provided at the end of the buffer element 3 having a larger outer diameter. By this arrangement, the surface area of the damper 3 is further enlarged, so that the distribution of the through holes 31 on the surface of the damper 3 can be more dispersed, that is, the throttling and cushioning effects of the damper 3 are more remarkable.

In one embodiment, as shown in fig. 5, the buffer member 3 has a cylindrical shape. So set up, cylindric comparatively convention has reduced the processing degree of difficulty of buffer element 3.

In one embodiment, as shown in fig. 6, the cushioning element 3 has a disc shape. By this arrangement, the structure of the buffer element 3 is simplified, saving material and providing space for installation of the flow guiding element 100.

The technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments are not described, however, all of the combinations of the technical features should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. The reversing valve comprises a first connecting pipe (1) and a valve body (2), wherein the first connecting pipe (1) is provided with a first channel (11), the valve body (2) is provided with a first inner cavity (21), the first channel (11) is communicated with the first inner cavity (21), high-pressure fluid can enter the first inner cavity (21) from the first channel (11), and the reversing valve is characterized by further comprising a buffer element (3) and a flow guiding element (100), the buffer element (3) is arranged at one end, close to the valve body (2), of the first connecting pipe (1) and separates the first channel (11) from the first inner cavity (21), the buffer element (3) is provided with one or more through holes (31) communicated with the first channel (11) and the first inner cavity (21), the flow guiding element (100) is arranged at one side, close to the first inner cavity (21), of the buffer element (3), and the flow guiding element (100) can change the high-pressure fluid flowing through the through holes (31);

the flow guiding element (100) comprises one or more flow guiding sheets (110), the flow guiding sheets (110) comprise a stop section (111) and a connecting section (112) for connecting the stop section (111) with the buffer element (3), one end of the stop section (111) is connected with the connecting section (112), the other end of the stop section (111) extends towards the direction away from the connecting section (112) and the central axis of the first connecting tube (1), and the stop section (111) is arranged with the buffer element (3) at intervals.

2. Reversing valve according to claim 1, characterized in that the projection of the deflector (110) onto the surface of the damping element (3) adjacent to the deflector (110) along the axial direction of the first connecting tube (1) is able to cover the through opening (31).

3. Reversing valve according to claim 1, characterized in that the stop section (111) is at an angle of-30 ° to +30° to a plane perpendicular to the axis of the first connecting tube (1).

4. A reversing valve according to claim 3, characterized in that the reversing valve further comprises a slider (51) and a valve seat (6), the valve seat (6) being arranged in the valve body (2), the slider (51) being arranged on the valve seat (6) and being capable of sliding on the valve seat (6), the end of the flow guiding element (100) remote from the buffer element (3) being arranged at a distance from the slider (51).

5. Reversing valve according to claim 1, characterized in that the flow area of one through-hole (31) or the sum of the flow areas of a plurality of through-holes (31) is smaller than the cross-sectional area of the first channel (11).

6. Reversing valve according to claim 1, characterized in that the cross-section of the through hole (31) is circular or oval or polygonal.

7. Reversing valve according to claim 1, characterized in that the damping element (3) has a barrel shape with an opening (32) on one side, the opening (32) facing away from the valve body (2), the opening (32) of the damping element (3) being connected to the inner wall of the first connecting tube (1); the flow guiding element (100) is arranged on the bottom wall (35) of the buffer element (3), the through hole (31) is arranged on the side wall (34) of the buffer element (3), and/or the through hole (31) is arranged on the bottom wall (35) of the buffer element (3).

8. Reversing valve according to claim 1, characterized in that the damping element (3) has a disc shape.

9. A refrigeration system comprising a reversing valve according to any one of claims 1-8.