WO2022166666A1

WO2022166666A1 - Four-way valve

Info

Publication number: WO2022166666A1
Application number: PCT/CN2022/073563
Authority: WO
Inventors: 冯忠波; 熊匀均; 张克鹏; 邵巨灿
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2021-02-08
Filing date: 2022-01-24
Publication date: 2022-08-11
Also published as: CN215110655U; JP2024505384A

Abstract

A four-way valve. The four-way valve comprises: a main valve (10) provided with a valve cavity (11), a high pressure channel (12) and a low pressure channel (13); a valve seat (20) fixedly disposed in the valve cavity (11), the valve seat (20) being disposed corresponding to the low pressure channel (13) and provided with a plurality of fluid holes (21) arranged side by side, and the maximum inner wall distance between two fluid holes (21) that are furthest apart from each other being L; and a sliding block (30) movably disposed on the valve seat (20), the length of the sliding block (30) being L1, two ends of the sliding block (30) in the length direction being symmetrically provided with pressure relief gaps (31), the pressure relief gaps (31) being located on the surface of the sliding block (30) facing the valve seat (20), and the blocking size of the sliding block (30) being L2, wherein L1 > L > L2. According to the four-way valve, the length of the sliding block is increased, the stress area is increased, and fluid channeling is avoided, thereby ensuring the normal operation of fluid.

Description

Four-way valve

This application claims the priority of the patent application with the application number 202120354746.8 and the invention name "four-way valve", which was submitted to the State Intellectual Property Office of China on February 8, 2021.

technical field

The utility model relates to the technical field of valve bodies, in particular to a four-way valve.

Background technique

At present, in the four-way valve, the size design of the slider is generally designed according to the size of the valve seat, and there is no industry standard. During the installation process of the four-way valve, the four-way valve will be installed upside down for the convenience of pipeline connection. During operation, especially in the variable frequency system, when the compressor operates at a low frequency, there may be insufficient flow, so that the thrust of the high-pressure pipeline on the slider is insufficient, resulting in a longitudinal gap between the slider and the valve seat, and then This causes the exhaust and suction of the compressor to jump up through the four-way valve, causing system failure.

Utility model content

The utility model provides a four-way valve to solve the problem that a longitudinal gap easily exists between a sliding block and a valve seat in the prior art.

The utility model provides a four-way valve. The four-way valve comprises a main valve. The main valve has a valve cavity, a high-pressure passage and a low-pressure passage. The high-pressure passage and the low-pressure passage are respectively located on both sides of the main valve. It communicates with the valve cavity; the valve seat is fixedly arranged in the valve cavity, the valve seat is correspondingly arranged with the low pressure channel, the valve seat has a plurality of fluid holes arranged side by side, and the maximum inner wall distance of the two fluid holes farthest apart is L; The slider is movably arranged on the valve seat. The length of the slider is L1. The two ends of the slider along the length direction are symmetrically provided with pressure relief gaps. The pressure relief gaps are located on the surface of the slider toward the valve seat. The block size of the block is L2, where L1>L>L2.

Further, the difference between L and L2 is between 0 and 8 mm.

Further, there are a first pressure relief channel and a second pressure relief channel that communicate with each other between the slider and the valve seat, the first pressure relief channel is formed by the radial gap between the fluid hole and the pressure relief gap, and the second pressure relief channel The channel is formed by the axial gap between the pressure relief gap and the valve seat surface. The flow area of the first pressure relief channel is S1, and the fluid area of the second pressure relief channel is S2. When the vertical centerline of the slider and the valve seat When the vertical centerlines of , S2 ≥ S1.

Further, the width dimension of the valve seat is B1, and the width dimension of the slider is B2, where B2≥B1.

Further, the surface of the sliding block facing the valve seat is provided with stepped structures, the stepped structures are respectively located at both ends of the sliding block, and the stepped structures form pressure relief gaps.

Further, the main valve is also provided with a plurality of fluid outlets, and the plurality of fluid outlets are arranged side by side with the low-pressure channel.

Further, one fluid hole among the plurality of fluid holes is communicated with the low-pressure channel, and the remaining fluid holes are communicated with the fluid outlet in one-to-one correspondence.

Further, the axis of the low pressure channel coincides with the axis of the high pressure channel.

Applying the technical solution of the present utility model, the four-way valve includes a main valve, a valve seat and a slider, wherein, a plurality of fluid holes are arranged side by side on the valve seat, and the maximum inner wall distance of the two fluid holes farthest apart is L, The length of the slider is set to L1, the block size of the slider is set to L2, and L1>L>L2, so set, the force area of the slider can be increased by increasing the length of the slider, which can ensure high pressure When the pressure difference between the channel and the low-pressure channel is small, sufficient thrust can still be provided to the slider to make the slider fit the valve seat, thereby preventing fluid blow-by and ensuring the normal operation of the fluid.

Description of drawings

The accompanying drawings that constitute a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 shows the structural schematic diagram of the four-way valve provided by the present invention;

Fig. 2 shows a partial enlarged view at A in Fig. 1;

Fig. 3 shows the dimension relation diagram of the valve seat and the slider in Fig. 1;

Fig. 4 shows the structural schematic diagram of the valve seat in Fig. 1;

Fig. 5 shows the structural schematic diagram of the slider in Fig. 1;

Figure 6 shows a bottom view of the slider in Figure 1;

FIG. 7 shows a front view of the slider of FIG. 1 .

Wherein, the above-mentioned drawings include the following reference signs:

10. Main valve; 11. Valve cavity; 12. High-pressure passage; 13. Low-pressure passage; 14. Fluid outlet;

20. Valve seat; 21. Fluid hole;

30, slider; 31, pressure relief gap; 41, first pressure relief channel; 42, second pressure relief channel.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in FIGS. 1 to 3 , an embodiment of the present invention provides a four-way valve, the four-way valve includes a main valve 10 , a valve seat 20 and a slider 30 . The main valve 10 has a valve cavity 11 , a high pressure passage 12 and a low pressure passage 13 , the high pressure passage 12 and the low pressure passage 13 are located on both sides of the main valve 10 respectively, and both the high pressure passage 12 and the low pressure passage 13 communicate with the valve cavity 11 . The valve seat 20 is fixedly arranged in the valve cavity 11, the valve seat 20 is arranged corresponding to the low pressure channel 13, the valve seat 20 has a plurality of fluid holes 21 arranged side by side, and the maximum distance between the inner walls of the two fluid holes 21 farthest apart is L . The sliding block 30 is movably arranged on the valve seat 20 , the length dimension of the sliding block 30 is L1 , the two ends of the sliding block 30 along the length direction are symmetrically provided with pressure relief gaps 31 , and the pressure relief gaps 31 are located in the direction of the sliding block 30 . The surface of the valve seat 20 and the middle of the slider 30 form a blocking portion, and the blocking dimension of the slider 30 is L2, where L1>L>L2.

The four-way valve provided by the present application includes a main valve 10 , a valve seat 20 and a slider 30 , wherein, the valve seat 20 is provided with a plurality of fluid holes 21 side by side, and the two fluid holes 21 are farthest apart. The maximum inner wall distance is L, the length of the slider 30 is set to L1, the block size of the slider 30 is set to L2, and L1>L>L2, set in this way, you can increase the length of the slider 30 by increasing the length of the slider 30. This can ensure that the pressure difference between the high-pressure channel 12 and the low-pressure channel 13 becomes smaller, and still can provide enough thrust to the slider 30 to make the slider 30 fit with the valve seat 20, thereby preventing fluid channeling gas to ensure the normal operation of the fluid. Moreover, setting L2 to be less than L can prevent the slider 30 from covering all the fluid holes 21 at the same time when the slider 30 moves to the middle, resulting in excessive pressure in the main valve 10 cavity and valve body deformation and other failures. When the slider 30 moves to the middle, the fluid holes 21 at both ends can communicate with the valve cavity 11 through the pressure relief gaps 31 on both sides of the slider 30 to solve the problem of pressure relief.

As shown in FIG. 4 , in this embodiment, three fluid holes 21 are provided on the valve seat 20 , and the maximum distance between the inner walls of the two fluid holes 21 farthest apart is the inner wall of the first fluid hole and the third fluid hole. For the farthest distance of the inner wall of the hole, setting L1 to be greater than L can ensure that the slider 30 covers all the fluid holes 21 , and the force bearing area of the slider 30 can also be increased by increasing L1 .

Specifically, the difference between L and L2 is set between 0 and 8 mm. If the difference between L and L2 is too small, the pressure relief effect will be poor; if the difference is too large, the blocking and switching effect will be affected. Therefore, the difference between L and L2 is set between 0 and 8mm, which can not only ensure the pressure relief effect, but also ensure the blocking effect during switching. In this embodiment, the difference between L and L2 is set to 5mm.

As shown in FIGS. 1 and 2 , the slider 30 and the valve seat 20 have a first pressure relief channel 41 and a second pressure relief channel 42 that communicate with each other. The first pressure relief channel 41 is composed of the fluid hole 21 and the pressure relief gap 31 . The second pressure relief channel 42 is formed by the axial gap between the pressure relief gap 31 and the surface of the valve seat 20. The flow area of the first pressure relief channel 41 is S1, and the second pressure relief channel 42 The area of the fluid is S2. When the vertical centerline of the slider 30 coincides with the vertical centerline of the valve seat 20, S2≥S1. By setting S2 to be greater than or equal to S1 , the fluid can smoothly pass through the fluid hole 21 and the valve cavity 11 , so as to further ensure the pressure relief effect when the slider 30 is located in the middle of the valve seat 20 .

Specifically, as shown in FIG. 5 , the surface of the sliding block 30 facing the valve seat 20 is a stepped surface, the middle of the sliding block 30 is high and the two ends are low, and the pressure relief gap 31 is formed by the stepped structure. As shown in FIG. 2 , the radial gap between the side surface of the stepped structure and the inner wall of the fluid hole 21 forms the first pressure relief channel 41 , and the axial gap between the stepped surface of the stepped structure and the surface of the valve seat 20 forms the second pressure relief channel 41 . Pressure relief passage 42 .

As shown in FIG. 4 and FIG. 6 , the width dimension of the valve seat 20 is B1, and the width dimension of the slider 30 is B2, wherein B2≧B1. Through the above arrangement, the force bearing area of the slider 30 can be further increased to ensure that the thrust force of the slider 30 can make the slider 30 fit with the valve seat 20 to meet the requirements for the slider 30 to move and switch.

Specifically, the main valve 10 is also provided with a plurality of fluid outlets 14 , and the plurality of fluid outlets 14 are arranged side by side with the low-pressure channel 13 . In this embodiment, the main valve 10 is provided with two fluid outlets 14. The two fluid outlets 14 are located on both sides of the low-pressure passage 13, respectively, and are matched with the valve seat 20 through the slider 30, so that the two fluid outlets 14 are connected to the valve seat 20. The valve chamber 11 is communicated.

In this embodiment, one fluid hole 21 of the plurality of fluid holes 21 is communicated with the low-pressure channel 13 , and the remaining fluid holes 21 are communicated with the fluid outlet 14 in one-to-one correspondence. In order to connect the fluid hole 21 with the low pressure channel 13 or the fluid outlet 14 , when the slider 30 moves on the valve seat 20 , the switching between the plurality of fluid outlets 14 and the valve cavity 11 can be completed. Specifically, there are three fluid holes 21 , the low pressure channel 13 communicates with the fluid hole 21 in the middle, and the fluid outlets 14 on both sides of the low pressure channel 13 communicate with the fluid holes 21 on both sides respectively.

The axis of the low-pressure channel 13 may be parallel to the axis of the high-pressure channel 12, or the axes of the two may be coincident. In this embodiment, the axis of the low-pressure passage 13 coincides with the axis of the high-pressure passage 12 . In this way, the fluid can flow into the valve cavity 11 uniformly, so as to ensure the stable flow of the fluid.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. The orientation or positional relationship is usually based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and these orientations do not indicate and imply the indicated device unless otherwise stated. Or elements must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the present invention; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood To limit the scope of protection of the present invention.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

A four-way valve, characterized in that the four-way valve comprises:

A main valve (10), the main valve (10) has a valve chamber (11), a high pressure passage (12) and a low pressure passage (13), the high pressure passage (12) and the low pressure passage (13) are respectively located in the On both sides of the main valve (10), the high pressure passage (12) and the low pressure passage (13) are both communicated with the valve cavity (11);

The valve seat (20) is fixedly arranged in the valve cavity (11), the valve seat (20) is arranged corresponding to the low pressure passage (13), and the valve seat (20) has a plurality of side-by-side arrangement on the valve seat (20). Fluid holes (21), the maximum inner wall distance of the two fluid holes (21) farthest apart is L;

A sliding block (30) is movably arranged on the valve seat (20), the length dimension of the sliding block (30) is L1, and two ends of the sliding block (30) along the length direction are symmetrically provided with A pressure relief notch (31), the pressure relief notch (31) is located on the surface of the slider (30) facing the valve seat (20), and the block size of the slider (30) is L2, wherein , L1>L>L2.
The four-way valve according to claim 1, wherein the difference between L and L2 is between 0 and 8 mm.
The four-way valve according to claim 1, wherein a first pressure relief passage (41) and a second pressure relief passage communicated with each other between the slider (30) and the valve seat (20) (42), the first pressure relief channel (41) is formed by the radial gap between the fluid hole (21) and the pressure relief gap (31), and the second pressure relief channel (42) is formed by The axial gap between the pressure relief notch (31) and the surface of the valve seat (20) is formed, the flow area of the first pressure relief passage (41) is S1, and the second pressure relief passage (42) ) of the fluid area is S2, when the vertical centerline of the slider (30) coincides with the vertical centerline of the valve seat (20), S2≥S1.
The four-way valve according to claim 1, characterized in that, the width dimension of the valve seat (20) is B1, and the width dimension of the slider (30) is B2, wherein B2≥B1.
The four-way valve according to claim 1, characterized in that, a surface of the sliding block (30) facing the valve seat (20) is provided with a stepped structure, and the stepped structure is respectively located on the sliding block (30). ), the stepped structure forms the pressure relief gap (31).
The four-way valve according to claim 1, characterized in that, the main valve (10) is further provided with a plurality of fluid outlets (14), and the plurality of the fluid outlets (14) are connected to the low-pressure passage (13). ) side by side.
The four-way valve according to claim 6, characterized in that, one of the fluid holes (21) among the plurality of fluid holes (21) communicates with the low-pressure passage (13), and the other fluid holes ( 21) is in one-to-one correspondence with the fluid outlet (14).
The four-way valve according to claim 7, characterized in that the axis of the low-pressure passage (13) coincides with the axis of the high-pressure passage (12).