Reversing valve

Abstract

According to the reversing valve, pressure impact borne by a sealing structure of a sliding block component can be reduced through structural optimization, and the service life of the sealing structure can be prolonged. The reversing valve comprises a valve body component and a sliding block component, the valve body component comprises a wall part, and the sliding block component is located in an inner cavity of the valve body component and can slide along the wall part. The sliding block component comprises a sliding block body and a sealing structure, the sliding block body comprises an opening end part, the opening end part is provided with an annular groove, the sliding block body is provided with a channel, and the channel comprises an opening of the opening end part; the sealing structure comprises a sealing ring and a sealing ring, the first end of the sealing ring is located in the annular groove, the second end face of the second end of the sealing ring forms a sealing face, the sealing face is attached to the wall part, the outer side wall of the sealing ring and the outer groove peripheral wall of the annular groove are sealed through the sealing ring, and a balance channel is formed between the inner side wall of the sealing ring and the sliding block body. The balance channel is communicated with the area of the first end face of the first end and the channel.

Description

Technical Field

[0001] The present application relates to the technical field of valve devices, and in particular to a reversing valve. Background Art

[0002] The reversing valve includes a main valve and a pilot valve. The main valve includes a valve body component, a slider component and a piston component equipped with a connecting rod. The pressure on both sides of the piston component of the main valve is changed by reversing the pilot valve. Under the action of the pressure difference, the piston component drives the slider component to move relative to the valve body component to realize the reversal of the main valve.

[0003] Taking a four-way reversing valve as an example, in a main valve of a four-way reversing valve, the slider of the slider component is a square structure, and the D, E, S, and C interfaces on the valve body component are arranged in a cross shape. The D interface and the S interface are opposite to each other, and the slider has two channels. The interface connected to each channel is changed by sliding the slider component relative to the valve body component; the channel of the slider has an open end matching the S interface (low-pressure area), and the open end is provided with a sealing structure. When the slider is switched to the open end to connect with the S interface, the sealing between the slider and the valve body component can be ensured.

[0004] The sealing structure includes a sealing ring and an O-ring. The sealing ring is inserted into the open end of the slider. An O-ring is provided between the upper surface of the sealing ring and the slider to isolate the high-pressure end and the low-pressure end. The lower surface of the sealing ring is sealed against the valve body component. In actual applications, it is found that the sealing ring of the slider component is easily deformed or even damaged. Summary of the invention

[0005] The purpose of the present application is to provide a reversing valve, which can reduce the pressure impact on the sealing structure of the slider component through structural optimization, thereby helping to extend the service life of the sealing structure.

[0006] In order to solve the above technical problems, the present application provides a reversing valve, comprising a valve body component and a slider component; the valve body component comprises a wall portion, the slider component is located in the inner cavity of the valve body component and can slide along the wall portion; the slider component comprises a slider body and a sealing structure, the slider body comprises an open end portion, the open end portion has an annular groove, the slider body has a channel, and the channel comprises an opening of the open end portion;

[0007] The sealing structure includes a sealing ring and a sealing ring, the first end of the sealing ring is located in the annular groove, the second end face of the second end of the sealing ring forms a sealing surface, the sealing surface is in contact with the wall portion, the outer side wall of the sealing ring and the outer groove peripheral wall of the annular groove are sealed by the sealing ring, and a balancing channel is provided between the inner side wall of the sealing ring and the slider body, and the balancing channel connects the area where the first end face of the first end is located and the channel.

[0008] In one feasible solution, the sealing ring includes a ring body, at least a portion of which is located in the annular groove; the balancing channel includes a gap between an inner circumferential wall of the ring body and an inner groove circumferential wall of the annular groove.

[0009] In a feasible solution, the second end of the ring body has a convex ring portion extending radially inward, and the balancing channel further includes a gap between the convex ring portion and an end surface of the open end.

[0010] In a feasible solution, the sealing structure further comprises an elastic member, and the elastic member is elastically arranged between the first end surface of the sealing ring and the bottom surface of the annular groove.

[0011] In a feasible solution, the elastic member is a wave spring.

[0012] In a feasible solution, the elastic member is a disc spring or a rubber ring, and the balancing channel further includes a groove formed on the first end surface of the sealing ring.

[0013] In a feasible solution, an outer side wall of the sealing ring and / or an outer groove peripheral wall of the annular groove is provided with a mounting groove for mounting the sealing ring.

[0014] In a feasible solution, the sealing ring is a metal sealing ring or a plastic sealing ring.

[0015] According to the solution provided in the present application, the slider component of the reversing valve is improved, and the sealing ring on the slider component for isolating the low-pressure area and the high-pressure area is arranged between the outer side wall of the sealing ring and the outer groove peripheral wall of the mounting groove. The area where the first end face (i.e., the upper end face) of the sealing ring is located and the channel of the slider component are connected through a balancing channel. In this way, the pressure difference force borne by the sealing ring mainly acts in the radial direction of the sealing ring. During the reversing movement of the slider component, when the interface between the sealing ring and the reversing valve is staggered, the first end face of the sealing ring is connected with the channel of the slider component through the balancing channel, and the pressure is balanced, which can avoid downward impact force on the sealing ring, reduce the probability of damage to the sealing ring, and effectively extend the service life of the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional schematic diagram of a main valve of a reversing valve in a first embodiment provided in the present application;

[0017] Figure 2 for Figure 1 A cross-sectional view of the main valve in the first state at another angle;

[0018] Figure 3 for Figure 1 A cross-sectional view of the main valve in the second state at another angle;

[0019] Figure 4 for Figure 1 A partial enlarged view of the middle A area;

[0020] Figure 5 for Figure 4 A partial enlarged view of the mating point between the middle sealing ring and the annular groove;

[0021] Figure 6 It is a structural schematic diagram of a sealing ring in a specific embodiment;

[0022] Figure 7 for Figure 6 A top view of the sealing ring shown;

[0023] Figure 8 for Figure 6 A schematic cross-sectional view of the sealing ring shown;

[0024] Fig. 9 for Figure 1 Schematic diagram of the structure of the disc spring;

[0025] Fig.10 for Fig. 9 A schematic cross-sectional view of the disc spring shown;

[0026] Fig.11 A cross-sectional schematic diagram of a main valve of a reversing valve in a second embodiment provided in the present application;

[0027] Fig.12 for Fig.11 A partial enlarged view of the B area;

[0028] Fig.13 for Fig.11 Schematic diagram of the structure of the wave spring;

[0029] Fig.14 for Fig.13 A schematic diagram of a partial structure of a wave spring is shown;

[0030] Fig.15 A cross-sectional schematic diagram of a main valve of a reversing valve in a third embodiment provided in the present application;

[0031] Fig.16 for Fig.15 A partial enlarged view of the middle C area;

[0032] Fig.17 A cross-sectional schematic diagram of a main valve of a reversing valve in a fourth embodiment provided in the present application;

[0033] Fig.18 for Fig.17 A partial enlarged view of area D in the middle.

[0034] Description of reference numerals:

[0035] Valve body component 10, valve body 11, first wall portion 111, S interface 111a, second wall portion 112, D interface 112a, third wall portion 113, fourth wall portion 114, end cover 12, S pipe 13, D pipe 14, first chamber 10a, second chamber 10b, third chamber 10c;

[0036] Slider component 20, slider body 21, channel 211, annular groove 212, outer groove peripheral wall 212a, inner groove peripheral wall 212b, opening end 213, opening 213a, sealing ring 22, first end face 22a, groove 221a, second end face 22b, ring body 221, convex ring portion 222, sealing ring 23, elastic member 24, disc spring 241, wave spring 242, rubber ring 243, balancing channel 25, first gap 251, second gap 252;

[0037] Piston component 30 , piston 31 , connecting rod 32 , and mounting groove 40 . DETAILED DESCRIPTION

[0038] This article studies the sealing structure in the background technology and finds that the reason why it is easily damaged is that when the slider moves relative to the valve body component, when the open end of the channel that matches the corresponding interface is offset from the interface, the sealing ring at this position will be partially unsupported on the lower surface facing the interface. At this time, the lower surface of the sealing ring is subjected to low pressure, while the upper surface of the sealing ring is subjected to high pressure. In this way, the sealing ring is subjected to downward pressure impact, and the sealing ring is in a partially suspended state. Under the pressure impact, it is easy to be damaged, especially in the initial stage when the sealing ring is offset from the interface. The impact force is large, which makes the sealing ring easy to be damaged.

[0039] To this end, the present application improves the structure of the reversing valve, with a focus on improving the sealing structure of the slider component.

[0040] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Without loss of generality, the following description will be given using a four-way reversing valve as an example, and the improved structure may also be used in other reversing valves.

[0042] Generally, a four-way reversing valve includes a main valve and a pilot valve. The pilot valve can change the pressure on both sides of the actuating part of the main valve by reversing. The actuating part moves under the action of the pressure difference to realize the reversing operation of the main valve. The specific structure of the pilot valve and the connection relationship between the pilot valve and the main valve are not the core of the invention of this application and are not described in detail here.

[0043] Please refer to Figure 1 , Figure 1This is a cross-sectional schematic diagram of the main valve of the four-way reversing valve in the first embodiment provided in the present application.

[0044] In this embodiment, the main valve of the reversing valve includes a valve body component 10 , a slider component 20 and a piston component 30 .

[0045] The valve body component 10 has an inner cavity and a plurality of interfaces connected to the inner cavity; the valve body component 10 includes a valve body 11 and two end covers 12. The valve body 11 is generally a cylindrical structure with openings at both ends. The two end covers 12 are respectively used to seal the openings at both ends of the valve body 11. The valve body 11 and the two end covers 12 together enclose a relatively closed inner cavity; the end covers 12 can be fixedly connected to the valve body 11 by fasteners such as bolts, and the interfaces connected to the inner cavity can be set on the valve body 11.

[0046] The slider component 20 is arranged in the inner cavity of the valve body component 10. The two ends of the slider component 20 are respectively connected to two piston components 30. The piston component 30 includes a piston 31 and a connecting rod 32. The piston 31 can separate the inner cavity of the valve body component 10 into independent chambers. The piston 31 is connected to the valve block component 20 through the connecting rod 32. The slider component 20 can move relative to the valve body component 10.

[0047] by Figure 1 In the example shown, the two pistons 31 divide the inner cavity of the valve body component 10 into three relatively independent chambers, a first chamber 10a is formed between the left end cover 12 and the left piston 31, a second chamber 10b is formed between the two pistons 31, and a third chamber 10c is formed between the right end cover 12 and the right piston 31; when working, the pilot valve can switch the high and low pressure states of the first chamber 10a and the third chamber 10c, so that the piston component 30 drives the sliding component 20 to move relative to the valve body component 10 under the action of the pressure difference force between the first chamber 10a and the third chamber 10c, thereby realizing the switching of the connection state of each interface of the valve body component 10.

[0048] Please refer to Figure 2 and Figure 3 , Figure 2 for Figure 1 A cross-sectional view of the main valve in the first state at another angle, Figure 3 for Figure 1 A cross-sectional view of the main valve in the second state at another angle.

[0049] Taking the reversing valve as a four-way valve as an example, the valve body component 10 has D, E, S, and C interfaces, and the slider component 20 can be switched between two positions, such as Figure 2 As shown, when the slider component 20 is in the first position, the main valve has a first state, the D interface is connected to the C interface, and the E interface is connected to the S interface, as shown in FIG. Figure 3As shown, when the slider component 20 is in the second position, the main valve has a second state, the D interface is communicated with the E interface, and the C interface is communicated with the S interface.

[0050] The cross-sectional shape of the valve body 11 can be circular, square or other shapes, which is related to the specific arrangement of the reversing valve or the matching slider component 20 .

[0051] For example, Figure 1 The reversing valve shown is a cross-sectional view of a square four-way reversing valve, and the inner cavity section of the valve body 11 is square, that is, the inner cavity of the valve body component 10 is a square cavity.

[0052] The valve body 11 of the valve body component 10 includes a first wall portion 111 and a second wall portion 112 that are arranged opposite to each other, wherein the first wall portion 111 is provided with an S interface 111a, the S interface 111a is connected to an S pipe 13, and the second wall portion 112 is provided with a D interface 112a, and the D interface 112a is connected to a D pipe 14; the valve body 11 also includes a third wall portion 113 and a fourth wall portion 114 that are arranged opposite to each other, and the third wall portion and the fourth wall portion are respectively provided with a C interface and an E interface.

[0053] The slider component 20 includes a slider body 21, and the slider body 21 has a square shape that matches the inner cavity of the valve body component 10. The slider body 21 has four channels 211, wherein the first channel and the second channel are arranged on the same cross section, and the third channel and the fourth channel are arranged on the same cross section. Figure 2 and Figure 3 For example, Figure 2 The cross-sectional view showing the locations of the first channel and the second channel is shown in FIG. Figure 3 The sectional view of the third channel and the fourth channel is shown in FIG. Figure 2 In the first position shown, the first channel can connect the D interface and the C interface, the second channel connects the S interface and the E interface, and the third channel and the fourth channel are inoperative; the slider body 21 slides to Figure 3 In the second position shown, the third channel is connected to the D interface and the E interface, and the fourth channel is connected to the S interface and the C interface. At this time, the first channel and the second channel are inoperative. In actual applications, the S interface 111a of the reversing valve is connected to the compressor suction port through the S pipe 13, which is a low-pressure area, and the D interface 112a of the reversing valve is connected to the compressor exhaust port through the D pipe 14, which is a high-pressure area.

[0054] The slider body 21 includes an opening end 213, and the opening end 213 has an annular groove 212. The channel 211 of the slider body 21 includes an opening 213a of the opening end 213. The channel 211 can be connected to the interface through the opening 213a of the opening end 213. The opening end 213 of the slider body 21 is slidably sealed with the corresponding wall of the valve body 11. A sealing structure is provided at the opening end 213 of the slider body 21 to ensure the sealing performance between the opening end 213 and the wall of the valve body 11 with the corresponding interface. The figure takes the cooperation between the slider body 21 and the first wall 111 as an example. The slider body 21 actually has corresponding opening ends 213 with the first wall 111, the second wall 112, the third wall 113 and the fourth wall 114 of the valve body 11.

[0055] The present application focuses on improving the sealing structure of the slider component 20 of the main valve, which is described in detail below.

[0056] Please continue to refer to Figure 1 , and combined with Figure 4 and Figure 5 ,in, Figure 4 for Figure 1 A partial enlarged view of the A part. Figure 5 for Figure 4 A partial enlarged view of the fitting area between the middle sealing ring and the annular groove.

[0057] In the illustrated example, the sealing structure is described by taking the cooperation between the channel 211 of the slider body 21 and the S interface 111 a as an example, and the cooperation between other interfaces and corresponding channels is similar, and will not be described one by one.

[0058] The slider body 21 includes an open end 213 corresponding to the S interface 111a, and the channel 211 matched with the S interface 111a includes an opening 213a of the open end 213. The open end 213 is provided with an annular groove 212. It can be understood that the opening of the annular groove 212 faces the first wall portion 111 of the valve body 11. In the illustrated orientation, the opening of the annular groove 212 faces downward.

[0059] The sealing structure of the slider component 20 includes a sealing ring 22 and a sealing ring 23. The first end of the sealing ring 22 is located in the annular groove 212, and the end surface of the second end of the sealing ring 22 forms a sealing surface, which is slidably sealed with the first wall portion 111 of the valve body 11. In the illustrated orientation, the first end of the sealing ring 22 is the upper end, and the second end is the lower end. The first end of the sealing ring 22 has a first end surface 22a, and the second end of the sealing ring 22 has a second end surface 22b, which is the aforementioned sealing surface.

[0060] The sealing ring 22 has an outer side wall relatively far from the center of the channel 211 and an inner side wall relatively close to the center of the channel 211 . The annular groove 212 has an outer groove peripheral wall 212 a relatively far from the center of the channel 211 and an inner groove peripheral wall 212 b relatively close to the center of the channel 211 .

[0061] The sealing ring 23 is located between the outer wall of the sealing ring 22 and the outer groove peripheral wall 212a of the annular groove 212, that is, the outer wall of the sealing ring 22 and the outer groove peripheral wall 212a of the annular groove 212 are sealed by the sealing ring 23; there is a balancing channel 25 between the inner wall of the sealing ring 22 and the slider body 21, and the balancing channel 25 connects the area where the first end face 22a of the sealing ring 22 is located and the channel 211, that is, the balancing channel 25 connects the area where the upper end face of the sealing ring 22 is located and the channel 211.

[0062] By adopting the above scheme, the sealing ring 23 isolating the low-pressure area and the high-pressure area on the slider component 20 is arranged on the outer side wall of the sealing ring 22, and the area where the first end face 22a of the sealing ring 22 is located is connected with the channel 211 through the balance channel 25, and the high and low pressures basically act in the radial direction of the sealing ring 22. When the slider component 20 reverses and slides, when the sealing ring 22 is offset from the S interface 111a, since the area where the second end face 22b is located is also connected with the channel 211, the first end face 22a and the second end face 22b of the sealing ring 22 are both in the low-pressure area, which can avoid the downward impact force on the sealing ring 22, effectively improve the stress condition of the partially suspended sealing ring 22, reduce the probability of damage to the sealing ring 22, and extend the service life of the sealing structure.

[0063] Please refer to Figures 6 to 8 , Figure 6 It is a structural schematic diagram of a sealing ring in a specific embodiment; Figure 7 for Figure 6 A top view of the sealing ring shown; Figure 8 for Figure 6 A schematic cross-sectional view of the sealing ring shown.

[0064] In one implementation, the sealing ring 22 includes a ring body 221, a first end (i.e., upper end) of the ring body 221 is inserted into the annular groove 212, a second end face (i.e., lower end face) of the ring body 221 is slidably sealed with the first wall portion 111, and the balancing channel 25 may include a first gap 251 between the inner peripheral wall of the ring body 221 and the inner groove peripheral wall 212b of the annular groove 212. In this way, the area where the lower end face of the ring body 221 is located can be connected to the upper end face of the ring body 221 through the first gap 251, so that during the reversing operation, the upper and lower end faces of the ring body 221 are both in the low pressure area, reducing the pressure on the ring body 221 in the up and down directions.

[0065] In a further embodiment, the sealing ring 22 further includes a convex ring portion 222 extending radially inward from the lower end of the ring body 221, where radially inward refers to a direction close to the center of the channel 211. It can be understood that the cross section of the sealing ring 22 is generally L-shaped, and in this way, the area of ​​the lower end face (i.e., the second end face 22b) of the sealing ring 22 can be increased, that is, the area of ​​the lower end face of the sealing ring 22 that is slidably matched with the first wall portion 111 can be set larger, which is conducive to improving the sealing effect.

[0066] On this basis, the balancing channel 25 further includes a second gap 252 between the convex ring portion 222 and the end surface of the opening end of the channel 211 .

[0067] In specific configuration, the sizes of the first gap 251 and the second gap 252 can be set as required, as long as the pressure difference between the upper end surface and the lower end surface of the sealing ring 22 can be balanced.

[0068] In one implementation, the sealing structure of the slider component 20 also includes an elastic member 24, which is elastically arranged between the first end face 22a of the sealing ring 22 and the bottom surface of the annular groove 212, so that an elastic force can be applied to the sealing ring 22 through the elastic member 24 to ensure that the sealing ring 22 fits the first wall portion 111 of the valve body 11, so as to ensure the sealing effect between the sealing ring 22 and the first wall portion 111.

[0069] At the same time, because the elastic member 24 helps the sealing ring 22 to fit against the valve body 11 to ensure sealing, the matching accuracy requirements of the slider body 21 and the valve body 11 can be reduced, thereby reducing the processing accuracy requirements of the slider body 21 and the valve body 11, thereby reducing the processing cost.

[0070] In addition, on the basis of providing the elastic member 24 , the provision of the aforementioned second gap 252 can also leave a margin of movement for the cooperation between the sealing ring 22 and the annular groove 212 in the groove depth direction, thereby avoiding excessive squeezing of the elastic member 24 .

[0071] Figures 1 to 5 In the first embodiment shown, the elastic member 24 is specifically a disc spring 241. The structure of the disc spring 241 can be referred to Fig. 9 and Fig.10 It is understood that the disc spring 241 has a conical disc-shaped structure.

[0072] Please refer to Figures 11 to 14 , Fig.11 A cross-sectional schematic diagram of a main valve of a reversing valve in a second embodiment provided in the present application; Fig.12 for Fig.11 A partial enlarged view of the B area; Fig.13 for Fig.11 Schematic diagram of the structure of the wave spring; Fig.14 for Fig.13 Schematic diagram of the partial structure of the wave spring shown.

[0073] Fig.11 and Fig.12 In the embodiment shown, the structure of the reversing valve is Figures 1 to 5 The reversing valves shown are basically the same, and can be understood by referring to the above description. The difference between the two is: Fig.11 and Fig.12 In the illustrated embodiment, the elastic member 24 in the sealing structure of the slider member 20 is a wave spring 242. Fig.13 and Fig.14 As shown, the wave spring 242 can be understood as a wavy ring structure. The function of the wave spring 242 is to overcome the upward pressure of the sealing ring 22 (caused by the R angle set at the lower end of the outer circumference of the sealing ring 22) and the verticality deviation caused by the processing of the slider body 21 and the valve body 11, so that the second end face 22b and the first wall portion 111 form a reliable seal.

[0074] In addition to the disc spring 241 and the wave spring 242, the elastic member 24 can also be in other forms, such as Fig.15 and Fig.16 The rubber ring 243 in the third embodiment shown in FIG. 1 is used as the elastic member 24. Fig.16 As shown, the rubber ring 243 may move along the radial direction between the first end face 22a of the sealing ring 22 and the bottom surface of the annular groove 212. The rubber ring 243 may be located at Fig.16 The position of the inner groove peripheral wall 212b of the annular groove 212 is shown. At this time, due to the influence of the rubber ring 243, the first end face 22a of the sealing ring 22 and the first gap 251 may not be connected. To avoid this situation, the first end face 22a of the sealing ring 22 can also be provided with a groove 221a, such as Figures 6 to 8 As shown, the groove 221a can extend along the radial direction of the sealing ring 22, or can be set at a certain angle to the radial direction, as long as it can ensure that the first end face 22a of the sealing ring 22 can be connected to the first gap 251 through the groove 221a. At this time, the balance channel 25 includes the groove 221a on the basis of including the first gap 251 and the second gap 252.

[0075] In specific configuration, the size, number and arrangement of the grooves 221a can be set as required. Figure 5 FIG. 2 only shows an exemplary structure in which the sealing ring 22 is provided with two grooves 221 a.

[0076] It should be pointed out that in the aforementioned first embodiment, the elastic member 24 is a disc spring 241. Due to the structural form of the disc springs 241242 themselves, when they are arranged between the first end face 22a of the sealing ring 22 and the bottom surface of the annular groove 212, they may also affect the communication state between the first gap 251 and the first end face 22a of the sealing ring 22. Therefore, when the disc spring 241 is selected as the elastic member 24, the first end face 22a of the sealing ring 22 may also be provided with a groove 221a; in the aforementioned second embodiment, the elastic member 24 is a wave spring 242. The structural setting of the wave spring 242 will basically not affect the communication state between the first gap 251 and the first end face 22a of the sealing ring 22. Therefore, when the elastic member 24 is a wave spring 242, the first end face 22a of the sealing ring 22 may not be provided with a groove 221a; of course, no matter what structural form the elastic member 24 is selected, the first end face 22a of the sealing ring 22 may also be provided with a groove 221a to increase the variety of elastic member 24 selections.

[0077] Figures 1 to 16 In the three embodiments shown, a mounting groove 40 is provided on the outer wall of the sealing ring 22, and the mounting groove 40 is used to mount the sealing ring 23. In practical applications, the mounting groove 40 can also be provided on the slider body 21, such as Fig.17 and Fig.18 As shown in the fourth embodiment, Fig.17 and Fig.18 In the figure, the elastic member 24 is shown as a disc spring 241. It can be understood that the selection of the elastic member 24 is relatively independent of the setting position of the mounting groove 40. Fig.17 and Fig.18 On the basis of the example shown, the elastic member 24 may also be a wave spring 242 or a rubber ring 243 , and the balancing channel 25 may be adaptively configured.

[0078] In other implementations, the mounting groove 40 may also be partially disposed on the slider body 21 and partially disposed on the sealing member 22 .

[0079] In a specific application, the sealing ring 22 can be a metal sealing ring or a plastic sealing ring.

[0080] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A reversing valve, characterized in that: The invention comprises a valve body component and a slider component; the valve body component comprises a wall portion, the slider component is located in the inner cavity of the valve body component and can slide along the wall portion; the slider component comprises a slider body and a sealing structure, the slider body comprises an open end portion, the open end portion has an annular groove, the slider body has a channel, and the channel comprises an opening of the open end portion; The sealing structure includes a sealing ring and a sealing ring, the first end of the sealing ring is located in the annular groove, the second end face of the second end of the sealing ring forms a sealing surface, the sealing surface is fitted with the wall portion, the outer side wall of the sealing ring and the outer groove peripheral wall of the annular groove are sealed by the sealing ring, and a balancing channel is provided between the inner side wall of the sealing ring and the slider body, and the balancing channel connects the area where the first end face of the first end is located and the channel.

2. The reversing valve according to claim 1, characterized in that: The sealing ring comprises a ring body, at least a portion of which is located in the annular groove; the balancing channel comprises a gap between an inner peripheral wall of the ring body and an inner groove peripheral wall of the annular groove.

3. The reversing valve according to claim 2, characterized in that: The second end of the ring body has a convex ring portion extending radially inward, and the balancing channel further includes a gap between the convex ring portion and an end surface of the open end.

4. The reversing valve according to any one of claims 1 to 3, characterized in that: The sealing structure further comprises an elastic member, and the elastic member is elastically arranged between the first end surface of the sealing ring and the bottom surface of the annular groove.

5. The reversing valve according to claim 4, characterized in that: The elastic member is a wave spring.

6. The reversing valve according to claim 4, characterized in that: The elastic member is a disc spring or a rubber ring, and the balancing channel further comprises a groove formed on the first end surface of the sealing ring.

7. The reversing valve according to any one of claims 1 to 3, characterized in that: The outer side wall of the sealing ring and / or the outer groove peripheral wall of the annular groove are provided with a mounting groove for mounting the sealing ring.

8. The reversing valve according to any one of claims 1 to 3, characterized in that: The sealing ring is a metal sealing ring or a plastic sealing ring.

Images