Valve device and air conditioning system

Abstract

The valve device comprises a valve element, a valve seat and a sealing piece, the valve seat is provided with a first circulation cavity, the valve element is movably arranged in the first circulation cavity, a limiting clamping groove is formed in the peripheral side of the valve element in the axial direction of the valve element, and an assembly opening is formed in the end, away from the valve element, of the limiting clamping groove; the sealing piece is arranged in the limiting clamping groove in a sleeved mode through the assembly opening and is tightly attached to the inner wall of the limiting clamping groove. A valve port part is arranged in the first circulation cavity, and the sealing piece can be in movable sealing fit with the inner wall of the first circulation cavity in the axial direction of the valve element so that the valve port part can be opened or closed. According to the valve device and the air conditioning system, the problem that the sealing part of the sliding seal is easily separated from the valve element is solved.

Description

Technical Field

[0001] The present application relates to the field of valve body technology, and in particular to a valve device and an air conditioning system. Background Art

[0002] Generally, a multi-way valve needs to be provided with multiple seals to adjust the connection status between each valve port. However, the seals are easily not fixed firmly, and the seals are subjected to the pressure difference impact generated by the fluid medium during use. Therefore, the seals are prone to fall off. How to fix the seals and prevent them from falling off is the technical problem to be solved by this application. Utility Model Content

[0003] Based on this, it is necessary to provide a valve device and an air conditioning system to solve the problem that the sealing portion of the sliding seal is easily separated from the valve core.

[0004] The valve device provided in the present application includes a valve core, a valve seat and a sealing member. The valve seat is provided with a first circulation cavity. The valve core is movably arranged in the first circulation cavity. The outer peripheral side of the valve core is provided with a limit groove arranged around the valve core itself axially. The end of the limit groove facing away from the valve core is provided with an assembly port. The sealing member is sleeved in the limit groove through the assembly port and fits tightly with the inner wall of the limit groove. A valve port portion is provided in the first circulation cavity. The valve core is movably sealed along the axial direction of the valve core through the sealing member and the inner wall of the first circulation cavity to open or close the valve port portion.

[0005] In one embodiment, the same limit slot includes multiple sub-grooves, and the multiple sub-grooves are arranged on the outer peripheral side of the valve core along the axial direction of the valve core, and the multiple sub-grooves correspond to sealing the same valve mouth part. The same sealing component includes multiple sub-components, and each sub-component is respectively arranged in the corresponding sub-groove.

[0006] In one of the embodiments, the width of the radial cross-section of the limit groove along the axial direction of the valve core is equal to the width of the assembly port along the axial direction of the valve core, and the width of the radial cross-section of the limit groove along the axial direction of the valve core is smaller than its own width along the radial direction of the valve core; the maximum width of the sealing element in the limit groove along the axial direction of the valve core is smaller than its own width along the radial direction of the valve core.

[0007] In one embodiment, the seal includes a main body and a sealing head. The seal is clamped in the limit slot through the main body. One end of the sealing head is connected to the main body, and the other end extends out of the limit slot through the assembly port and movably seals with the inner wall of the first circulation cavity. The width of the sealing head along the axial direction of the valve core is smaller than the width of the main body along the axial direction of the valve core.

[0008] In one embodiment, the limit slot includes a first slot and a second slot, the first slot extends radially along the valve core, and the assembly port is arranged at one end of the first slot away from the valve core axis, one end of the second slot is connected to the end of the first slot away from the assembly port, and the other end extends axially along the valve core; the sealing member includes a first part and a second part, the first part is clamped in the first slot, and the second part is clamped in the second slot; the axial length of the second slot along the valve core is greater than the axial length of the first slot along the valve core; the axial length of the second part along the valve core is greater than the axial length of the first slot along the valve core; or, the axial length of the second slot along the valve core is equal to the axial length of the first slot along the valve core; the inner wall of the second slot has a protrusion along the axial direction of the valve core, and at least part of the protrusion extends into the second part.

[0009] In one embodiment, the valve port portion includes a first valve port, a second valve port, a third valve port and a fourth valve port arranged in sequence along the axial direction of the valve core, and the sealing member includes a first sealing member and a second sealing member spaced apart along its own axial direction. The valve core opens or closes the first valve port and the second valve port through the first sealing member, and the valve core opens or closes the third valve port and the fourth valve port through the second sealing member.

[0010] In one embodiment, when the valve core is in the first sealing position, the first sealing portion seals the first valve port and opens the second valve port, and the second sealing portion seals the third valve port and opens the fourth valve port. When the valve core is in the second sealing position, the first sealing portion seals the second valve port and opens the first valve port, and the second sealing portion seals the fourth valve port and opens the third valve port.

[0011] In one embodiment, the hardness of the second sealing portion is greater than or equal to the hardness of the first sealing portion.

[0012] In one embodiment, the radial dimension of the second sealing portion along the valve core is greater than the radial dimension of the third valve port along the valve core, and the radial dimension of the second sealing portion along the valve core is greater than the radial dimension of the fourth valve port along the valve core.

[0013] The present application also provides an air conditioning system, which includes the valve device described in any one of the above embodiments.

[0014] Compared with the prior art, the valve device and air-conditioning system provided in the present application install the seal in the limit groove on the outer peripheral side of the valve core through the assembly port, and during use, the seal can cooperate with the inner wall of the first circulation cavity along the seal of the valve core to prevent the seal from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of the valve device of Example 3 provided in the present application;

[0017] Figure 2 A cross-sectional view of the valve device of Embodiment 3 provided in the present application;

[0018] Figure 3 for Figure 2 An enlarged view of point A is shown;

[0019] Figure 4 A partial cross-sectional view of the valve device of Example 1 provided in the present application;

[0020] Figure 5 A partial cross-sectional view of the valve device of the second embodiment provided in the present application.

[0021] 140, the second connecting port; 141, the limit slot; 142, the sub-slot; 143, the second slot; 144, the assembly port; 200, the valve seat; 210, the first connecting chamber; 211, the first valve port; 212, the second valve port; 213, the third valve port; 214, the fourth valve port; 215, the valve port portion; 221, the first opening; 222, the second opening; 223, the third opening; 224, the fourth opening; 300, the first sealing portion; 400, the second sealing portion; 500, the driving mechanism; 510, the rotor assembly; 520, the driving rod; 530, the nut; 600, the sealing member; 610, the sub-member; 620, the main body; 630, the sealing head; 640, the first portion; 650, the second portion. DETAILED DESCRIPTION

[0022] See also Figure 1-Figure 5 The present application provides a valve device and an air conditioning system, wherein the valve device includes a valve core 100, a valve seat 200 and a sealing member 600. The valve seat 200 is provided with a first circulation cavity 210, and the valve core 100 is movably arranged in the first circulation cavity 210. The outer peripheral side of the valve core 100 is provided with a limit groove 140 arranged around its own axial direction, and the end of the limit groove 140 away from the valve core 100 is provided with an assembly port 144. The sealing member 600 is sleeved in the limit groove 140 through the assembly port 144 and fits tightly with the inner wall of the limit groove 140.

[0023] like Figure 2 As shown, a valve opening 215 is provided in the first circulation cavity 210 , and the valve core 100 is movably sealed along the axial direction of the valve core 100 through the sealing member 600 and the inner wall of the first circulation cavity 210 to open or close the valve opening 215 .

[0024] The seal 600 is sleeved into the limit groove 140 on the outer peripheral side of the valve core 100 through the assembly port 144, and during use, the seal 600 can cooperate with the inner wall of the first flow cavity 210 along the seal of the valve core 100 to prevent the seal 600 from falling off.

[0025] Embodiment 1

[0026] like Figure 4 As shown, the width of the radial cross section of the limiting groove 140 along the axial direction of the valve core 100 is equal to the width of the assembly port 144 along the axial direction of the valve core 100, and the width of the radial cross section of the limiting groove 140 along the axial direction of the valve core 100 is smaller than its own width (radial cross section of the limiting groove 140) along the radial direction of the valve core 100. In addition, the maximum width of the sealing member 600 in the limiting groove 140 along the axial direction of the valve core 100 is smaller than its own width along the radial direction of the valve core 100.

[0027] It should be noted that the radial cross section of the limiting groove 140 refers to the cross section corresponding to the limiting groove 140 when the limiting groove 140 is cut along the radial direction of the valve core 100 .

[0028] Specifically, the cross section of the limiting slot 140 is rectangular or elliptical.

[0029] Correspondingly, the radial cross section of the sealing member 600 is rectangular or elliptical.

[0030] Such an arrangement can reduce the difficulty of installing the sealing member 600 .

[0031] Furthermore, in one embodiment, if Figure 4 As shown, the sealing member 600 includes a main body 620 and a sealing head 630. The sealing member 600 is clamped in the limit clamping groove 140 through the main body 620. One end of the sealing head 630 is connected to the main body 620, and the other end extends out of the limit clamping groove 140 through the assembly port 144 and is movably sealed with the inner wall of the first flow cavity 210. In addition, the width of the sealing head 630 along the axial direction of the valve core 100 is smaller than the width of the main body 620 along the axial direction of the valve core 100.

[0032] Such a configuration can reduce the contact area between the seal 600 and the inner wall of the first circulation cavity 210 , thereby increasing the contact pressure between the seal 600 and the inner wall of the first circulation cavity 210 , and further improving the sealing effect of the seal 600 .

[0033] Embodiment 2

[0034] like Figure 5 As shown, the limit groove 140 includes a first groove 142 and a second groove 143, the first groove 142 extends radially along the valve core 100, and the assembly port 144 is arranged at one end of the first groove 142 away from the axis of the valve core 100, one end of the second groove 143 is connected to one end of the first groove 142 away from the assembly port 144, and the other end extends axially along the valve core 100.

[0035] In this way, the radial cross section of the limiting groove 140 formed by the communication between the first groove 142 and the second groove 143 is L-shaped.

[0036] Correspondingly, the radial cross section of the sealing member 600 is L-shaped.

[0037] Such a configuration further improves the clamping strength between the sealing member 600 and the limiting slot 140 , making it difficult for the sealing member 600 to escape from the limiting slot 140 .

[0038] Furthermore, if Figure 5 As shown, the sealing member 600 includes a first portion 640 and a second portion 650, which are perpendicular to each other and integrally formed, the first portion 640 is clamped in the first groove 142, and the second portion 650 is clamped in the second groove 143. The sealing member 600 is made of elastic material, including but not limited to rubber, silicone, soft plastic and other materials, which are not listed here one by one.

[0039] The axial length of the second groove 143 along the valve core 100 is greater than the axial length of the first groove 142 along the valve core 100 ; the axial length of the second portion 650 along the valve core 100 is greater than the axial length of the first groove 142 along the valve core 100 .

[0040] Alternatively, the axial length of the second groove 143 along the valve core 100 is equal to the axial length of the first groove 142 along the valve core 100 ; the inner wall of the second groove 143 has a protrusion along the axial direction of the valve core 100 , and at least part of the protrusion extends into the second portion 650 .

[0041] Embodiment 3

[0042] like Figure 2 and Figure 3 As shown, the same limiting groove 140 includes a plurality of sub-grooves 141 , which are arranged at intervals on the outer peripheral side of the valve core 100 along the axial direction of the valve core 100 , and the plurality of sub-grooves 141 correspond to and seal the same valve opening 215 .

[0043] Correspondingly, the same sealing element 600 includes a plurality of sub-elements 610 , and each sub-element 610 is disposed in a corresponding sub-slot 141 .

[0044] It should be noted that “the plurality of sub-grooves 141 all correspond to and seal the same valve opening 215 ” means that the sub-components 610 provided in the plurality of sub-grooves 141 are all used to seal the same valve opening 215 .

[0045] like Figure 2 As shown, the sealing member 600 includes a first sealing portion 300. When the first sealing portion 300 includes two sub-components 610, the two sub-components 610 are defined as a first sealing ring and a second sealing ring, respectively, and the two sub-grooves 141 are defined as a first sub-groove and a second sub-groove, respectively. The first sealing ring is located in the first sub-groove, and the first sealing ring can seal the first valve port 211. The second sealing ring is located in the second sub-groove, and the second sealing ring can seal the second valve port 212.

[0046] like Figure 2 As shown, the sealing member 600 includes a second sealing portion 400. When the second sealing portion 400 includes two sub-components 610, the two sub-components 610 are defined as a third sealing ring and a fourth sealing ring, respectively, and the plurality of sub-grooves 141 corresponding to the second sealing portion 400 are respectively a third sub-groove and a fourth sub-groove. The third sealing ring is located in the third sub-groove, and the third sealing ring can seal the third valve port 213. The fourth sealing ring is located in the fourth sub-groove, and the fourth sealing ring can seal the fourth valve port 214.

[0047] Embodiment 4

[0048] like Figure 2 As shown, the valve port portion 215 includes a first valve port 211, a second valve port 212, a third valve port 213 and a fourth valve port 214 arranged in sequence along the axial direction of the valve core 100. However, it is not limited thereto. In other embodiments, the valve port portion 215 includes other numbers of valve ports arranged in sequence along the axial direction of the valve core 100, which are not listed here one by one.

[0049] Furthermore, if Figure 2 As shown, the valve seat 200 is provided with a first opening 221, a second opening 222, a third opening 223 and a fourth opening 224, and the first opening 221, the second opening 222, the third opening 223 and the fourth opening 224 are respectively connected with external pipelines (not shown). The first opening 221 and the third opening 223 are arranged at one end of the valve seat 200, the second opening 222 is arranged at the other end of the valve seat 200, and the fourth opening 224 is arranged at the same end as the second opening 222, or the fourth opening 224 is arranged at the end between the third valve port 213 and the second valve port 212. In addition, along the axial direction of the valve core 100, the first opening 221, the second opening 222, the third opening 223 and the fourth opening 224 are arranged in sequence.

[0050] Furthermore, the first opening 221 is arranged between the first valve port 211 and the second valve port 212, the second opening 222 is arranged between the second valve port 212 and the third valve port 213, the third opening 223 is arranged between the third valve port 213 and the fourth valve port 214, and the fourth opening 224 is arranged on the side of the fourth valve port 214 away from the third valve port 213.

[0051] Of course, in other embodiments, the first opening 221 can also be arranged on the side of the first valve port 211 away from the second valve port 212, the second opening 222 is arranged between the first valve port 211 and the second valve port 212, the third opening 223 is arranged between the second valve port 212 and the third valve port 213, and the fourth opening 224 is arranged between the third valve port 213 and the fourth valve port 214.

[0052] The valve core 100 is provided with a second circulation cavity 110 , and two ends of the second circulation cavity 110 are provided with a first communication port 120 and a second communication port 130 which can be respectively communicated with the first circulation cavity 210 .

[0053] Specifically, the first communication port 120 is disposed on the side wall of the valve core 100, and the second communication port 130 is disposed at the end of the valve core 100. In addition, the first communication port 120 is disposed at one end of the valve core 100 close to the first valve port 211, and the second communication port 130 is disposed at one end of the valve core 100 close to the fourth valve port 214.

[0054] However, the present invention is not limited thereto. In other embodiments, the first communication port 120 may be disposed at an end portion, and the second communication port 130 may be disposed at a side wall of the valve core 100 .

[0055] like Figure 1 and Figure 2 As shown, the valve device also includes a driving mechanism 500 connected to the valve core 100, which is used to drive the valve core 100 to move along its own axial direction to achieve the switching of different working modes of the valve device. Among them, the driving mechanism 500 includes a rotor assembly 510, a driving rod 520 and a nut 530, the nut 530 is installed on the valve seat 200, and is threadedly connected to the driving rod 520, one end of the driving rod 520 is fixedly connected to the rotor assembly 510, and the other end is connected to the valve core 100. During operation, the rotor assembly 510 can rotate the driving rod 520, so as to promote the driving rod 520 to move along its own axial direction through the threaded cooperation between the driving rod 520 and the nut 530, thereby driving the valve core 100 to move along its own axial direction. Among them, the axial direction of the driving rod 520 is the same as the axial direction of the valve core 100, and the driving rod 520 is coaxially assembled with the valve core 100.

[0056] like Figure 2As shown, the seal 600 includes a first sealing portion 300 and a second sealing portion 400 spaced apart along its axial direction. However, the seal 600 is not limited thereto. In other embodiments, the seal 600 may also include other numbers of sealing portions, which are not listed here one by one.

[0057] It should be noted that the first sealing portion 300 is disposed at an end of the valve core 100 close to the driving mechanism 500 , and the second sealing portion 400 is disposed at an end of the valve core 100 away from the driving mechanism 500 .

[0058] But not limited thereto, in another embodiment, the first sealing portion 300 is disposed at an end of the valve core 100 away from the driving mechanism 500 , and the second sealing portion 400 is disposed at an end of the valve core 100 close to the driving mechanism 500 .

[0059] When the valve core 100 is in the first sealing position, the first sealing portion 300 seals the first valve port 211 and opens the second valve port 212, and the second sealing portion 400 seals the third valve port 213 and opens the fourth valve port 214. At this time, the first opening 221 is connected to the second opening 222 through the second valve port 212, and the third opening 223 is connected to the fourth opening 224 through the fourth valve port 214.

[0060] When the valve core 100 is in the second sealing position, the first sealing portion 300 seals the second valve port 212 and opens the first valve port 211, and the second sealing portion 400 seals the fourth valve port 214 and opens the third valve port 213. At this time, the first opening 221 is connected to the fourth opening 224 through the first valve port 211 and the second flow chamber 110, and the second opening 222 is connected to the third opening 223 through the third valve port 213.

[0061] Embodiment 5

[0062] On the basis of the fourth embodiment, the hardness of the second sealing part 400 is greater than the hardness of the first sealing part 300, and the first sealing part 300 can adopt the structure of the sealing member 600 described in the first embodiment, the second embodiment, or the third embodiment. The radial dimension of the second sealing part 400 along the valve core 100 is greater than the radial dimension of the third valve port 213 along the valve core 100, and the radial dimension of the second sealing part 400 along the valve core 100 is greater than the radial dimension of the fourth valve port 214 along the valve core 100. The second sealing part 400 is respectively in contact with the third valve port 213 and the fourth valve port 214 for sealing. The second sealing part 400 can also adopt the structure of the sealing member 600 described in the third embodiment.

[0063] Compared with the first sealing part 300, the second sealing part 400 has a greater hardness, and is not easily deformed even if the pressure difference on both sides of the second sealing part 400 is large, thereby preventing the second sealing part 400 from being separated from the valve core 100. Specifically, the second sealing part 400 is a plastic part, such as a polytetrafluoroethylene material, a polyimide material, or a polyetherketone material, which are not listed here. At this time, the second sealing part 400 is not easily damaged under the action of the pressure difference, which greatly improves the structural strength of the second sealing part 400. Correspondingly, the first sealing part 300 is a rubber part, such as a nitrile rubber part, a fluororubber part, an acrylic rubber part, a chloroprene rubber part, etc., which are not listed here.

[0064] On the basis of the fourth embodiment, the hardness of the second sealing part 400 may also be equal to the hardness of the first sealing part 300. When the hardness of the first sealing part 300 is equal to the hardness of the second sealing part 400, and the first sealing part 300 and the second sealing part 400 are both made of soft materials (including but not limited to rubber, etc.), the structures of the first sealing part 300 and the second sealing part 400 have the following five arrangements:

[0065] In the first case, the first sealing portion 300 and the second sealing portion 400 both adopt the structure of the sealing member 600 described in the first embodiment;

[0066] In the second case, the first sealing portion 300 and the second sealing portion 400 both adopt the structure of the sealing member 600 described in the second embodiment;

[0067] In a third case, one of the first sealing portion 300 and the second sealing portion 400 adopts the structure of the sealing member 600 described in the first embodiment, and the other adopts the structure of the sealing member 600 described in the second embodiment;

[0068] In the fourth case, the first sealing portion 300 adopts the structure of the sealing member 600 described in the third embodiment, and the second sealing portion 400 adopts the structure of the sealing member 600 described in the first embodiment;

[0069] In the fifth case, the first sealing portion 300 adopts the structure of the sealing member 600 described in the third embodiment, and the second sealing portion 400 adopts the structure of the sealing member 600 described in the second embodiment.

[0070] Regardless of whether the hardness of the second sealing portion 400 is greater than the hardness of the first sealing portion 300 or the hardness of the second sealing portion 400 is equal to the hardness of the first sealing portion 300, the first sealing portion 300 can satisfy:

[0071] When the valve core 100 is in the first sealing position, the first valve port 211 and the third valve port 213 are both in a sealed state. When the distance that the valve core 100 moves from the first sealing position to the second sealing position is less than the first preset distance, the third valve port 213 is opened, the first valve port 211 is still in a sealed state, the fourth valve port 214 is in an open state, the second valve port 212 is in an open state, and the second valve port 212 is connected to the third valve port 213 and the fourth valve port 214, and the first flow cavity 210 on the side of the first sealing part 300 away from the second sealing part 400 can be connected to the first flow cavity 210 on the side of the first sealing part 300 facing the second sealing part 400 through the first communication port 120, the second flow cavity 110, the second communication port 130, the fourth valve port 214, the third valve port 213, and the second valve port 212 in sequence, that is, the first flow cavities 210 on both sides of the first sealing part 300 are in a mutually connected state, so the fluid pressure on both sides of the first sealing part 300 is equal. When the valve core 100 moves a first preset distance, the first valve port 211 is opened, and the second valve port 212, the third valve port 213 and the fourth valve port 214 are all in an opened state, the first valve port 211, the second valve port 212, the third valve port 213 and the fourth valve port 214 are interconnected, and the fluid pressures on both sides of the first sealing portion 300 are equal. Afterwards, the second valve port 212 is closed, and the first valve port 211, the third valve port 213 and the fourth valve port 214 are all interconnected, and the fluid pressures on both sides of the first sealing portion 300 are equal. Finally, the second valve port 212 remains closed until the fourth valve port 214 is closed, and the valve core 100 moves to the second sealing position. Therefore, from the time when the third valve port 213 of the valve core 100 is initially opened to the time when the fourth valve port 214 is closed, the fluid pressure on both sides of the first sealing part 300 is always equal, and the first sealing part 300 is not subjected to the fluid pressure difference force, thereby avoiding deformation and damage of the first sealing part 300 and effectively preventing the first sealing part 300 from falling off.

[0072] When the valve core 100 is in the second sealing position, the second valve port 212 and the fourth valve port 214 are both in a sealed state. When the distance that the valve core 100 moves from the second sealing position to the first sealing position is less than the second preset distance, the fourth valve port 214 is opened, the second valve port 212 is still in a sealed state, the third valve port 213 is in an open state, the first valve port 211 is in an open state, the fourth valve port 214, the third valve port 213, and the first valve port 211 are connected, and the first flow cavity 210 on the side of the first sealing part 300 away from the second sealing part 400 can be connected to the first flow cavity 210 on the side of the first sealing part 300 facing the second sealing part 400 through the first valve port 211, the first communication port 120, the second flow cavity 110, the second communication port 130, the fourth valve port 214, and the third valve port 213 in sequence, that is, the first flow cavity 210 on both sides of the first sealing part 300 is in a mutually connected state, so at this time, the fluid pressure on both sides of the first sealing part 300 is equal. When the distance that the valve core 100 moves from the second sealing position to the first sealing position is the second preset distance, the second valve port 212 is opened, the fourth valve port 214, the third valve port 213, and the first valve port 211 are all in an open state, the fourth valve port 214, the third valve port 213, and the first valve port 211 are connected, and the fluid pressure on both sides of the first sealing part 300 is equal. Afterwards, the first valve port 211 is closed, at which time the second valve port 212, the third valve port 213, and the fourth valve port 214 are all connected, and the fluid pressure on both sides of the first sealing part 300 is equal. Finally, the first valve port 211 remains closed until the third valve port 213 is closed, and the valve core 100 moves to the first sealing position. Therefore, when the valve core 100 is initially opened from the fourth valve port 214 to the third valve port 213 being closed, the fluid pressure on both sides of the first sealing part 300 is always equal, and the first sealing part 300 is not subjected to the fluid pressure difference force, thereby avoiding deformation and damage of the first sealing part 300 and effectively preventing the first sealing part 300 from falling off.

[0073] Furthermore, by balancing the pressure on both sides of the first sealing portion 300 , the resistance to the movement of the valve core 100 can be reduced.

[0074] When the first sealing portion 300 adopts the structure of the sealing element 600 described in the third embodiment, the first sealing portion 300 includes two sub-components 610 , which are a first sealing ring and a second sealing ring.

[0075] The following content describes the movement of the valve core 100 with the first sealing ring and the second sealing ring from the second sealing position to the first sealing position.

[0076] When the valve core 100 is in the second sealing position, the second sealing ring seals the second valve port 212, the first sealing ring is separated from the first valve port 211, the second sealing portion 400 seals the fourth valve port 214, and the third valve port 213 is open. When the distance that the valve core 100 moves from the second sealing position to the first sealing position is less than the second preset distance, the first valve port 211, the third valve port 213, and the fourth valve port 214 are all in an open state and interconnected, and the second sealing ring and the inner wall of the first circulation chamber 210 are sealed to close the second valve port 212. In addition, at this time, the first sealing ring is located between the first valve port 211 and the second valve port 212 and does not play a sealing role. The first valve port 211 is in an open state, and the fluid pressure on both sides of the first sealing ring is equal. The first circulation cavity 210 on the side of the second sealing ring away from the second sealing part 400 can be connected to the first circulation cavity 210 on the side of the second sealing ring toward the second sealing part 400 through the first valve port 211, the first communication port 120, the second circulation cavity 110, the second communication port 130, the fourth valve port 214 and the third valve port 213 in sequence, and the fluid pressures on both sides of the second sealing ring are equal. Therefore, within the range of the moving distance, neither the first sealing ring nor the second sealing ring will be impacted by the fluid pressure difference.

[0077] Afterwards, when the valve core 100 moves from the second sealing position to the first sealing position a second preset distance, the second sealing ring detaches from the second valve port 212, and the first sealing ring does not close the first valve port 211. The first valve port 211, the second valve port 212, the third valve port 213, and the fourth valve port 214 are all in an open state and interconnected, and the fluid pressures on both sides of the first sealing ring and the second sealing ring are equal.

[0078] Subsequently, the first sealing ring closes the first valve port 211 until the fourth valve port 214 is closed, and the second valve port 212, the third valve port 213, and the fourth valve port 214 are all in an open state and connected to each other. The second sealing ring is separated from the second valve port 212, and the fluid pressure on both sides of the second sealing ring is equal. The first circulation cavity 210 of the first sealing ring away from the second sealing part 400 can be connected to the first circulation cavity 210 of the first sealing ring facing the second sealing part 400 through the first connecting port 120, the second circulating cavity 110, the second connecting port 130, the fourth valve port 214, the third valve port 213, and the second valve port 212 in sequence, and the fluid pressure on both sides of the first sealing ring is equal.

[0079] Finally, the valve core 100 is located at the first sealing position, the first sealing ring seals the first valve port 211, the second sealing ring is separated from the second valve port 212, the second sealing part 400 seals the third valve port 213, and the fourth valve port 214 is opened.

[0080] Therefore, when the valve core 100 moves from the second sealing position to the first sealing position, from the opening of the fourth valve port 214 to the closing of the third valve port 213 , the first sealing ring and the second sealing ring are never impacted by the pressure difference of the fluid on both sides thereof.

[0081] The following content describes the movement of the valve core 100 with the first sealing ring and the second sealing ring from the first sealing position to the second sealing position.

[0082] When the valve core 100 is in the first sealing position, the first sealing ring seals the first valve port 211, the second sealing ring is separated from the second valve port 212, the second sealing portion 400 seals the third valve port 213, and the fourth valve port 214 is open. When the distance that the valve core 100 moves from the first sealing position to the second sealing position is less than the first preset distance, the second valve port 212, the third valve port 213, and the fourth valve port 214 are all in an open state and interconnected, and the first sealing ring and the inner wall of the first circulation chamber 210 are always sealed to close the first valve port 211. In addition, at this time, the second sealing ring is located between the first valve port 211 and the second valve port 212, and does not play a sealing role. The second valve port 212 is in an open state, and the fluid pressure on both sides of the second sealing ring is equal. The first flow cavity 210 of the first sealing ring away from the second sealing part 400 can be connected to the first flow cavity 210 of the first sealing ring toward the second sealing part 400 through the first communication port 120, the second flow cavity 110, the second communication port 130, the fourth valve port 214, the third valve port 213, and the second valve port 212 in sequence, and the fluid pressures on both sides of the first sealing ring are equal. Therefore, within the moving distance range, the first sealing ring and the second sealing ring will not be impacted by the fluid pressure difference.

[0083] Afterwards, when the valve core 100 moves from the first sealing position to the second sealing position a second preset distance, the first sealing ring detaches from the first valve port 211, and the second sealing ring does not close the second valve port 212. The first valve port 211, the second valve port 212, the third valve port 213, and the fourth valve port 214 are all in an open state and interconnected, and the fluid pressures on both sides of the first sealing ring and the second sealing ring are equal.

[0084] Subsequently, the second sealing ring keeps closing the second valve port 212 until the fourth valve port 214 is closed, and the first valve port 211, the third valve port 213, and the fourth valve port 214 are all in an open state and connected to each other. The first sealing ring is separated from the first valve port 211, and the fluid pressure on both sides of the first sealing ring is equal. The first circulation cavity 210 of the second sealing ring away from the second sealing part 400 can be connected to the first circulation cavity 210 of the second sealing ring facing the second sealing part 400 through the first valve port 211, the first connecting port 120, the second circulation cavity 110, the second connecting port 130, the fourth valve port 214, and the third valve port 213 in sequence, and the fluid pressure on both sides of the second sealing ring is equal.

[0085] Finally, the valve core 100 is located at the second sealing position, the second sealing ring seals the second valve port 212, the first sealing ring is separated from the first valve port 211, the second sealing part 400 seals the fourth valve port 214, and the third valve port 213 is opened.

[0086] Therefore, when the valve core 100 moves from the first sealing position to the second sealing position, from the opening of the third valve port 213 to the closing of the fourth valve port 214, the first sealing ring and the second sealing ring are never impacted by the pressure difference of the fluid on both sides thereof.

[0087] The present application also provides an air-conditioning system, which includes the valve device described in any one of the above embodiments, and the valve device includes but is not limited to an electronic reversing valve, a solenoid valve or a multi-way valve.

[0088] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

[0090] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal width of the first feature is higher than that of the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal width of the first feature is smaller than that of the second feature.

[0094] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

Claims

1. A valve device, characterized in that: The invention comprises a valve core (100), a valve seat (200) and a sealing member (600), wherein the valve seat (200) is provided with a first circulation cavity (210), the valve core (100) is movably arranged in the first circulation cavity (210), the outer peripheral side of the valve core (100) is provided with a limit groove (140) arranged around the valve core (100) in an axial direction, the limit groove (140) is provided with an assembly port (144) at one end away from the valve core (100), and the sealing member (600) is sleeved in the limit groove (140) through the assembly port (144) and is tightly fitted with the inner wall of the limit groove (140); A valve opening (215) is provided in the first circulation cavity (210), and the valve core (100) is sealably matched along the axial direction of the valve core (100) through the sealing member (600) and the inner wall of the first circulation cavity (210) to open or close the valve opening (215).

2. The valve device according to claim 1, characterized in that The same limit groove (140) includes a plurality of sub-grooves (141), and the plurality of sub-grooves (141) are arranged at intervals along the axial direction of the valve core (100) on the outer peripheral side of the valve core (100), and the plurality of sub-grooves (141) correspond to and seal the same valve mouth portion (215), and the same sealing component (600) includes a plurality of sub-components (610), and each of the sub-components (610) is respectively arranged in the corresponding sub-groove (141).

3. The valve device according to claim 1, characterized in that The width of the radial cross section of the limiting groove (140) along the axial direction of the valve core (100) is equal to the width of the assembly opening (144) along the axial direction of the valve core (100); the width of the radial cross section of the limiting groove (140) along the axial direction of the valve core (100) is smaller than its own width along the radial direction of the valve core (100); the maximum width of the sealing element (600) in the limiting groove (140) along the axial direction of the valve core (100) is smaller than its own width along the radial direction of the valve core (100).

4. The valve device according to claim 3, characterized in that The sealing member (600) comprises a main body (620) and a sealing head (630), wherein the sealing member (600) is clamped to the limiting groove (140) through the main body (620), one end of the sealing head (630) is connected to the main body (620), and the other end thereof extends out of the limiting groove (140) through the assembly port (144) and is movably sealed with the inner wall of the first circulation cavity (210), and the width of the sealing head (630) along the axial direction of the valve core (100) is smaller than the width of the main body (620) along the axial direction of the valve core (100).

5. The valve device according to claim 1, characterized in that The limit groove (140) comprises a first groove (142) and a second groove (143), wherein the first groove (142) extends radially along the valve core (100), and the assembly opening (144) is arranged at an end of the first groove (142) away from the axis of the valve core (100), and one end of the second groove (143) is connected to an end of the first groove (142) away from the assembly opening (144), and the other end extends along the axial direction of the valve core (100); The sealing member (600) comprises a first portion (640) and a second portion (650), wherein the first portion (640) is clamped in the first groove (142), and the second portion (650) is clamped in the second groove (143); The axial length of the second groove (143) along the valve core (100) is greater than the axial length of the first groove (142) along the valve core (100); the axial length of the second portion (650) along the valve core (100) is greater than the axial length of the first groove (142) along the valve core (100); Alternatively, the axial length of the second groove (143) along the valve core (100) is equal to the axial length of the first groove (142) along the valve core (100); the inner wall of the second groove (143) has a protrusion along the axial direction of the valve core (100), and at least part of the protrusion extends into the second part (650).

6. The valve device according to claim 1, characterized in that The valve port portion (215) includes a first valve port (211), a second valve port (212), a third valve port (213) and a fourth valve port (214) arranged in sequence along the axial direction of the valve core (100); the sealing member (600) includes a first sealing member (300) and a second sealing member (400) arranged at intervals along its own axial direction; the valve core (100) opens or closes the first valve port (211) and the second valve port (212) through the first sealing member (300); and the valve core (100) opens or closes the third valve port (213) and the fourth valve port (214) through the second sealing member (400).

7. The valve device according to claim 6, characterized in that When the valve core (100) is in a first sealing position, the first sealing portion (300) seals the first valve port (211) and opens the second valve port (212), and the second sealing portion (400) seals the third valve port (213) and opens the fourth valve port (214); When the valve core (100) is in the second sealing position, the first sealing portion (300) seals the second valve port (212) and opens the first valve port (211), and the second sealing portion (400) seals the fourth valve port (214) and opens the third valve port (213).

8. The valve device according to claim 6, characterized in that The hardness of the second sealing portion (400) is greater than or equal to the hardness of the first sealing portion (300).

9. The valve device according to claim 6, characterized in that The radial dimension of the second sealing portion (400) along the valve core (100) is greater than the radial dimension of the third valve port (213) along the valve core (100), and the radial dimension of the second sealing portion (400) along the valve core (100) is greater than the radial dimension of the fourth valve port (214) along the valve core (100).

10. An air conditioning system, characterized in that: Comprising a valve device according to any one of claims 1 to claim 9.

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