Fluid control valve

Abstract

The present disclosure relates to a fluid control valve (1), comprising: a valve body (10), wherein the valve body (10) is provided with a valve core mounting cavity (13); and a valve core (20), wherein the valve core (20) is mounted in the valve core mounting cavity (13) and can rotate around a rotation axis (X) relative to the valve body (10). The fluid control valve (1) is provided with a balancing channel (2), the balancing channel (2) being located in the valve core mounting cavity (13).

Description

A fluid control valve Technical Field

[0001] The present disclosure relates to a fluid control valve, in particular, the fluid control valve has a balancing channel located in the valve core installation cavity. Background Art

[0002] Fluid circuits typically feature fluid control valves and pipes to switch and control the flow of fluids. In automotive thermal management systems, multiple fluid control valves and pipes are typically used to control the flow of refrigerant and heat exchange fluid, switching between different operating modes.

[0003] In the fluid control valve disclosed in the prior art, fluid only flows on one side of the valve core. In this case, the pressure of the fluid acts on a side of the valve core, causing the pressure on the valve core both sides to lose balance.

[0004] Summary of the Invention

[0005] Therefore, the present disclosure aims to solve the above problems, and its purpose is to provide a fluid control valve, which has the advantages of being able to keep the pressure on both sides of the valve core balanced and having a compact structure.

[0006] This objective is achieved by a fluid control valve according to one embodiment of the present disclosure, comprising: a valve body having a valve core mounting cavity; and a valve core mounted within the valve core mounting cavity and rotatable relative to the valve body about a rotation axis. The fluid control valve has a balancing channel located within the valve core mounting cavity; the balancing channel communicates with both sides of the valve core.

[0007] One of the objectives of the present disclosure is to provide a fluid control valve that includes a balancing channel without increasing its volume. The fluid control valve according to the present disclosure arranges the balancing channel within the valve core mounting cavity, which is used to mount the valve core. This arrangement does not increase the diameter of the valve body or the size of the fluid control valve. Because the balancing channel connects both sides of the valve core, the fluid control valve according to the present disclosure can balance the fluid pressure on both sides of the valve core through the balancing channel. Furthermore, the valve has a relatively small volume, making it convenient for use in compact fluid circuits.

[0008] The fluid control valve according to the present disclosure may also have one or more of the following features, alone or in combination.

[0009] According to one embodiment of the present disclosure, the balancing passage includes a first path within the valve core mounting cavity that runs from one side of the valve core around an edge of the valve core to the other side of the valve core. Fluid can flow through this first path from one side of the valve core around the edge of the valve core to the other side of the valve core, thereby ensuring that both sides of the valve core are filled with fluid and in a fluid balance state.

[0010] According to one embodiment of the present disclosure, the balancing channel includes a second path running through the valve core, through which fluid can flow from one side of the valve core to the other side of the valve core, thereby causing both sides of the valve core to be filled with fluid and in a fluid balance state.

[0011] According to one embodiment of the present disclosure, the valve body has a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the balancing channel. Fluid enters and exits the fluid control valve through these valve ports. In particular, the first valve port can be a valve port for allowing fluid with a higher pressure to enter and exit the fluid control valve. The connection between the first valve port and the balancing channel allows the fluid with a higher pressure to fill both sides of the valve core.

[0012] According to one embodiment of the present disclosure, the valve core includes a core body, a first sealing cover, and a second sealing cover. The core body has a first valve core port, a second valve core port, a third valve core port, and a fourth valve core port. The first sealing cover is connected to the core body and covers the first and second valve core ports, so that the first and second valve core ports are in sealed communication with each other, forming a first valve core channel. The second sealing cover is connected to the core body and covers the third and fourth valve core ports, so that the third and fourth valve core ports are in sealed communication with each other, forming a second valve core channel.

[0013] According to one embodiment of the present disclosure, the fluid control valve further includes a valve seat, which abuts the valve core and is installed in the second valve port, the third valve port, the fourth valve port, and the fifth valve port of the valve body. The valve seat seals and connects the corresponding valve ports of the valve body with the corresponding valve core ports of the valve core. It should be noted that in this embodiment, the first valve port of the valve body is not installed with a valve seat.

[0014] According to one embodiment of the present disclosure, the valve core is capable of rotating relative to the valve body between a first position and a second position about a rotation axis. When the valve core is in the first position, the first valve port is connected to the second valve port via the first valve core passage, and the third valve port is connected to the fifth valve port via the second valve core passage. When the valve core is in the second position, the first valve port is connected to the fifth valve port via the first valve core passage, and the third valve port is connected to the fourth valve port via the second valve core passage.

[0015] According to the above features, the fluid control valve defines two flow paths. When the valve core is in the first position, in one flow path, fluid enters and exits the fluid control valve through the first and second valve ports, and in the other flow path, fluid enters and exits the fluid control valve through the third and fifth valve ports. When the valve core is in the second position, in one flow path, fluid enters and exits the fluid control valve through the first and fifth valve ports, and in the other flow path, fluid enters and exits the fluid control valve through the third and fourth valve ports.

[0016] According to one embodiment of the present disclosure, the valve core is further rotatable relative to the valve body to a third position about the rotation axis. When the valve core is in the third position, the first valve port is connected to the fifth valve port via the second valve core passage, and the second valve port is connected to the fourth valve port via the first valve core passage.

[0017] According to the above features, when the valve core is in the third position, in one flow path, the fluid enters and exits the fluid control valve through the first valve port and the fifth valve port, and in another flow path, the fluid enters and exits the fluid control valve through the second valve port and the fourth valve port.

[0018] According to one embodiment of the present disclosure, the valve core has a first valve core port, a second valve core port, a third valve core port, a fourth valve core port and a built-in channel, the first valve core port and the second valve core port are open to the valve core installation cavity, and the third valve core port and the fourth valve core port are sealed and connected through the built-in channel.

[0019] According to one embodiment of the present disclosure, the fluid control valve further includes a valve seat, which abuts the valve core and is installed in the first valve port, the second valve port, the third valve port, the fourth valve port, and the fifth valve port of the valve body. The valve seat seals the corresponding valve port of the valve body and the corresponding valve core port of the valve core. It should be noted that in this embodiment, valve seats are installed in each of the five valve ports of the valve body.

[0020] According to one embodiment of the present disclosure, the valve core is capable of rotating relative to the valve body between a first position and a second position about a rotation axis. When the valve core is in the first position, the first valve port is connected to the second valve port via the valve core installation cavity, and the third valve port is connected to the fifth valve port via the built-in passage. When the valve core is in the second position, the first valve port is connected to the fifth valve port via the valve core installation cavity, and the third valve port is connected to the fourth valve port via the built-in passage.

[0021] According to the above features, the fluid control valve defines two flow paths. When the valve core is in the first position, in one flow path, fluid enters and exits the fluid control valve through the first and second valve ports, and in the other flow path, fluid enters and exits the fluid control valve through the third and fifth valve ports. When the valve core is in the second position, in one flow path, fluid enters and exits the fluid control valve through the first and fifth valve ports, and in the other flow path, fluid enters and exits the fluid control valve through the third and fourth valve ports.

[0022] According to one embodiment of the present disclosure, the valve core further has a through-hole that forms part of the second path of the balancing channel. In other words, fluid can pass through the through-hole from one side of the valve core to the other side of the valve core, thereby ensuring that both sides of the valve core are filled with fluid and in a state of fluid balance.

[0023] According to one embodiment of the present disclosure, the through hole is located between the first valve core port and the second valve core port in the circumferential direction of the valve core.

[0024] According to one embodiment of the present disclosure, the fluid control valve further includes an elastic member, one end of which presses against the valve core along the rotation axis so that the bottom surface of the valve core is biased against the valve seat.

[0025] According to one embodiment of the present disclosure, the valve core is provided with an elastic member installation groove at the top, the valve core and the elastic member installation groove are coaxially arranged around the rotation axis, and one end of the elastic member is arranged in the elastic member installation groove to push against the valve core.

[0026] According to one embodiment of the present disclosure, the fluid control valve further includes a bearing, and the other end of the elastic member presses against the top of the valve body through the bearing.

[0027] According to one embodiment of the present disclosure, the valve port for mounting the valve seat among the first to fifth valve ports includes a step portion for supporting the valve seat.

[0028] According to one embodiment of the present disclosure, the valve body includes a valve body and a valve cover, wherein the valve cover is detachably mounted on the bottom of the valve body to define the valve core mounting cavity, and the first to fifth valve ports are all arranged on the bottom surface of the valve cover.

[0029] According to one embodiment of the present disclosure, the fluid control valve further includes an actuating device, disposed at the top of the valve body and configured to rotate the valve core relative to the valve body about the rotation axis. A relief hole is provided at the top of the valve body, and the valve core includes a valve core shaft extending along the rotation axis. The upper end of the valve core shaft extends outside the valve body through the relief hole and is coupled to the actuating device.

[0030] According to one embodiment of the present disclosure, the valve core shaft is directly connected to the actuating device, or the valve core shaft is connected to the actuating device through a transmission device.

[0031] According to one embodiment of the present disclosure, the valve cover is provided with a positioning countersunk hole, and the lower end of the valve core shaft is rotatably inserted into the positioning countersunk hole.

[0032] According to one embodiment of the present disclosure, a limit groove is further provided on the top of the valve body, and a limit pin is provided on the top of the valve core. The limit groove cooperates with the limit pin to constrain the rotation angle of the valve core.

[0033] According to one embodiment of the present disclosure, the valve cover is further provided with a positioning protrusion protruding from a bottom surface thereof for positioning the angular position of the fluid control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other features and advantages of the present disclosure will become more apparent through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, which are provided for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. The following drawings are not drawn to scale with actual size, but are intended to illustrate the main points of the present disclosure. In the drawings:

[0035] FIG. 1 is a perspective view of a fluid control valve according to one embodiment of the present disclosure.

[0036] 2A is a cross-sectional view of the fluid control valve shown in FIG. 1 ; and FIG. 2B is a partial cross-sectional view of the fluid control valve, in which a first path of the balancing passage is marked.

[0037] FIG. 3 illustrates a valve cover according to one embodiment of the present disclosure.

[0038] FIG. 4 illustrates a valve seat according to one embodiment of the present disclosure.

[0039] 5A and 5B illustrate a valve core according to one embodiment of the present disclosure.

[0040] Figures 6A to 6C illustrate a valve core according to another embodiment of the present disclosure, wherein Figure 6C is a cross-sectional view taken along line aa in Figure 6B. Figure 7 illustrates a partial cross-sectional view of a fluid control valve according to an embodiment of the present disclosure, in which the first and second paths of the balance channel are marked.

[0041] FIG8 illustrates a valve cover according to another embodiment of the present disclosure.

[0042] FIG. 9 shows a valve body according to an embodiment of the present disclosure.

[0043] Throughout the drawings, the same or similar components are indicated by the same reference numerals. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments.

[0045] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by ordinary technicians in the field to which this disclosure belongs. The words "one", "an" or "the" and the like used in the patent specification and claims of this disclosure do not indicate a quantitative limitation, but rather indicate the presence of at least one. The words "include" or "comprise" and the like mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "first", "second" and the like used in the patent specification and claims of this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] Various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Here, it should be noted that in the drawings, the same reference numerals are given to components having substantially the same or similar structures and functions, and repeated descriptions thereof will be omitted.

[0047] 1 and 2 , a fluid control valve 1 includes a valve body 10 , a valve core 20 , and an actuating device 6 . The valve body 10 defines a valve core mounting cavity 13 , within which the valve core 20 is mounted and rotatable relative to the valve body 10 about a rotation axis X. The rotation of the valve core 20 is actuated by the actuating device 6 .

[0048] The valve body 10 includes a valve body 11 and a valve cover 12. The valve cover 12 is removably mounted on the bottom of the valve body 11 to define a valve core mounting chamber 13. The actuator 6 is mounted on the top of the valve body 11. The bottom surface of the valve cover 12 of the valve body 10 is provided with a first valve port 14a, a second valve port 14b, a third valve port 14c, a fourth valve port 14d, and a fifth valve port 14e. The fluid control valve 1 communicates with other components of the fluid circuit via the first to fifth valve ports 14a-14e. That is, the fluid control valve 1 is implemented as a five-way valve. It should be understood that the number of valve ports in the fluid control valve 1 can be different.

[0049] As shown in Figure 1, the valve ports of the fluid control valve 1 are all located on the bottom surface of the valve cover 12. This allows the valve ports to be connected to the fluid circuit when the fluid control valve 1 is installed through this bottom surface. This eliminates the tedious step of connecting each valve port of the fluid control valve 1 to the fluid circuit, simplifying the assembly of the fluid circuit. The valve cover 12 also includes a positioning protrusion 19 protruding from its bottom surface. This positioning protrusion 19 can be used to determine the angular position of the fluid control valve 1 when installed in the fluid control valve 1.

[0050] In particular, the fluid control valve 1 is a fluid control valve of a fluid circuit of a thermal management system of a motor vehicle. The fluid flowing in the fluid circuit may include a refrigerant and / or a heat exchange fluid. The refrigerant can be in a high-pressure state and a low-pressure state, and the fluid circuit therefore includes a high-pressure fluid circuit and a low-pressure fluid circuit. The valve port of the fluid control valve 1 can be connected to the high-pressure fluid circuit and the low-pressure fluid circuit, respectively. In the following, for ease of description, the valve port where the high-pressure fluid circuit enters the fluid control valve 1 is referred to as the first valve port 14a. It should be understood that the above convention is merely exemplary and not restrictive, and the fluid control valve 1 can be connected to the high-pressure fluid circuit and the low-pressure fluid circuit through different valve ports.

[0051] Referring to Figures 1 and 2 , it can be seen that the first to fifth valve ports 14a-14e are all located on the lower side of the valve core 20. This causes the valve core 20 to be biased upward by fluid pressure. In order to balance the bias caused by this fluid pressure, the fluid control valve 1 is provided with a balancing channel 2 within the valve core mounting chamber 13. The balancing channel 2 has the effect of fluidly connecting the portion of the valve core mounting chamber 13 on the upper side of the valve core 20 with the portion on the lower side of the valve core 20. In this way, through the balancing channel 2, the fluid on the upper and lower sides of the valve core 20 can be in a balanced state, and the fluid pressures on the upper and lower sides of the valve core 20 can offset each other.

[0052] Referring to Figure 2B , a gap g exists between the edge of the valve core 20 and the valve body 10. This gap g allows fluid to flow from one side of the valve core 20, bypassing the edge of the valve core 20 and reaching the other side of the valve core 20. Gap g constitutes the first path 2a of the balancing channel 2. Furthermore, gap g eliminates friction between the edge of the valve core 20 and the valve body 10, helping to reduce resistance to the rotation of the valve core 20.

[0053] In the embodiments shown in Figures 2B and 7 , the gap g comprises a first portion g1 extending parallel to the rotation axis X, a second portion g2 extending perpendicular to the rotation axis X, and a third portion g3 extending perpendicular to the rotation axis X. The second portion g2 and the third portion g3 of the gap g are located on the upper and lower sides of the valve core 20, respectively. The second portion g2 of the gap g is located between the valve core 20 and the valve body 11, and the third portion g3 of the gap g is located between the valve core 20 and the valve cover 12. The first portion g1 of the gap g is also located between the valve core 20 and the valve body 11. In embodiments not shown in the figures, the first portion g1 of the gap g can also be located between the valve core 20 and the valve cover 12. The balancing channel 2 connects the two sides of the valve core 20 along the direction of the rotation axis X, that is, the two sides of the valve core 20 in the axial direction.

[0054] In the embodiment shown in Figure 2B, along the first path 2a of the balancing channel 2, the fluid flows from the third portion g3 of the gap g to the first portion g1, and then flows to the second portion g2 to bypass the edge of the valve core 20 from one side of the valve core 20 and reach the other side of the valve core 20.

[0055] The valve core 20 of the fluid control valve 1 can have different structures. Figures 5A and 5B show a first embodiment of the valve core 20. As shown in the figure, in this first embodiment, the valve core 20 includes a core body 21, a first sealing cover 23a and a second sealing cover 23b. The core body 21 is provided with a first valve core port 24a, a second valve core port 24b, a third valve core port 24c and a fourth valve core port 24d. The first to fourth valve core ports 24a-24d all pass through the core body 21. The first sealing cover 23a is connected to the core body 21 and covers the first valve core port 24a and the second valve core port 24b. The connection between the first sealing cover 23a and the core body 21 is preferably a sealed connection and can be achieved by welding or similar means. The first sealing cover 23a can ensure that the first valve core port 24a and the second valve core port 24b are in sealed communication, forming a first valve core channel 22a. Similarly, a second sealing cap 23b is connected to the core body 21 and covers the third valve core port 24c and the fourth valve core port 24d. The connection between the second sealing cap 23b and the core body 21 is preferably a sealed connection, which can be achieved by welding or similar means. The second sealing cap 23b can sealably connect the third valve core port 24c and the fourth valve core port 24d, forming the second valve core passage 22b.

[0056] The fluid control valve 1 also includes a valve seat 3. The valve seat 3 is arranged between the valve cover 12 and the valve core 20. It has a hollow structure and can sealably connect the corresponding valve ports of the valve cover 12 with the corresponding valve core ports of the valve core 20. As shown in Figures 3 and 4, the second valve port 14b, the third valve port 14c, the fourth valve port 14d, and the fifth valve port 14e of the valve cover 12 all include a stepped portion 15. One end of the valve seat 3 is partially inserted into the valve port and supported on the stepped portion 15 by the sealing member 31. The other end of the valve seat 3 abuts the bottom surface of the core 21 to connect the corresponding valve port and the valve core passage. Reference can also be made to the cross-sectional view shown in Figure 7, which shows the valve seat 3 installed in the third valve port 14c.

[0057] In the valve cover 12 shown in Figure 3, the first valve port 14a lacks a stepped portion, and the valve seat 3 is not mounted within this first valve port 14a. This can be seen in the cross-sectional view shown in Figure 2B. Therefore, there is no seal between the first valve port 14a and the valve core 20. The first valve port 14a directly opens into the valve core mounting cavity 13 and, therefore, communicates with the balancing channel 2. More specifically, the first valve port 14a communicates with the third portion g3 of the gap g. As described above, the first valve port 14a is the port through which high-pressure fluid enters the fluid control valve 1. The balancing channel 2 can be configured to communicate with this first valve port 14a. This allows the high-pressure fluid entering through the first valve port 14a to fill the valve core mounting cavity 13 both below and above the valve core 20, effectively preventing the valve core 20 from being subjected to unbalanced fluid bias. Because the other valve ports are sealed to the valve core ports via the valve seats, fluids from different flow paths in the fluid control valve 1 are prevented from mixing.

[0058] 6A to 6C and 7 illustrate a second embodiment of the valve core 20. In this embodiment, the valve core 20 has a first valve core port 24a, a second valve core port 24b, a third valve core port 24c, a fourth valve core port 24d, and an internal passage 25. The first and second valve core ports 24a, 24b open to the valve core mounting cavity 13, while the third and fourth valve core ports 24c, 24d are sealedly connected via the internal passage 25.

[0059] FIG8 shows the valve cover 12 that mates with the valve core 20 of the second embodiment. Its construction differs slightly from the valve cover 12 shown in FIG3 . In this embodiment, the first through fifth valve ports 14a-14e of the valve cover 12 all include a stepped portion 15 and are each mounted with a valve seat 3. Therefore, the connection between the valve ports and the valve core ports is sealed by the valve seat 3. Specifically, the first valve port 14a selectively communicates with either a first valve core port 24a or a second valve core port 24b that opens into the valve core mounting cavity 13. Specifically, as shown in FIG6A , 6B, and 6C , the valve core 20 includes a recess 20a located within and communicating with the valve core mounting cavity 13. The recess 20a opens into the upper end surface of the valve core 20. The first and second valve core ports 24a and 24b are formed at one end of the recess 20a's bottom wall and at the other end of the recess 20a's lower end surface. The recess 20a communicates with the valve core mounting cavity 13 through this opening. The first valve port 14a indirectly leads to the valve core installation chamber 13 through the first valve core port 24a or the second valve core port 24b. Therefore, the balancing channel 2 is also connected to the first valve port 14a, so that the high-pressure fluid entering through the first valve port 14a fills the valve core installation chamber 13 at both the lower side and the upper side of the valve core 20.

[0060] As shown in Figures 6A-6B, the valve core 20 may also be provided with a through-hole 26, which is circumferentially located between the first valve core port 24a and the second valve core port 24b. One end of the through-hole 26 is formed in the bottom wall of the groove 20a, and the other end is formed in the lower end surface of the valve core 20. Fluid can flow from one side of the valve core 20 through the through-hole 26 to the other side of the valve core 20, forming the second path 2b of the balancing channel 2. It should be noted that fluid can also flow from one side of the valve core 20, bypassing the edge of the valve core 20 and reaching the other side of the valve core 20. In other words, the balancing channel 2 also has a first path 2a. Figure 7 shows a balancing channel 2 having a first path 2a and a second path 2b. In the embodiment shown in Figure 7, along the first path 2a of the balancing channel 2, fluid flows from the second portion g2 of the gap g to the first portion g1, and then to the third portion g3. Furthermore, it should be noted that, although not shown in the drawings, the valve core 20 according to the first embodiment shown in FIG. 5A and FIG. 5B may also include a similar through-hole.

[0061] Referring to Figure 2A , the fluid control valve 1 further includes an elastic member 4. This elastic member 4 is, for example, a coil spring, one end of which presses against the valve core 20 along the rotation axis X, while the other end presses against the top of the valve body 10 via a bearing 5. The elastic force of the elastic member 4 biases the bottom surface of the valve core 20 against the valve seat 3, thereby ensuring a seal between the valve seat 3, the valve core 20, and the valve cover 12. The bearing 5 facilitates rotation of the valve core 20 relative to the valve body 10. In the valve core 20 of the first embodiment shown in Figure 5A , the inner edges of the first and second sealing covers 23a and 23b have an arcuate shape. The elastic member 4 presses against the valve core 20 inside the first and second sealing covers 23a and 23b. In the valve core 20 of the second embodiment shown in Figure 6A , an elastic member mounting groove 27 is provided at the top of the valve core 20. This elastic member mounting groove 27 is coaxial with the valve core 20 about the rotation axis X. The elastic member 4 presses against the valve core 20 within this elastic member mounting groove 27.

[0062] Continuing with FIG2A , the fluid control valve 1 further includes an actuator 6 disposed at the top of the valve body 10. The valve core 20 is actuated by the actuator 6 to rotate relative to the valve body 10 about the rotation axis X. A relief hole 16 is provided at the top of the valve body 11. The valve core 20 includes a valve core shaft 28 extending along the rotation axis X. The upper end of the valve core shaft 28 extends outside the valve body 10 through the relief hole 16 and is coupled to the actuator 6. In the example shown in FIG2A , the actuator 6 is not coaxial with the valve body 10, and the valve core shaft 28 is indirectly connected to the actuator 6 via a transmission 7. It is contemplated that the actuator 6 may also be coaxial with the valve body 10, with the valve core shaft 28 directly connected to the actuator 6. As shown in FIG1-3 , the valve cover 12 is provided with a positioning counterbore 17 on its inner side, into which the lower end of the valve core shaft 28 is rotatably inserted. The positioning counterbore 17 is coaxial with the relief hole 16.

[0063] The rotation of the valve core 20 relative to the valve body 10 can align the valve port with different valve core ports, thereby controlling the flow path of the fluid.

[0064] 5A , the valve core 20 can rotate relative to the valve body 10 about the rotation axis X to a first position, a second position, and a third position, wherein the first position is circumferentially between the second position and the third position.

[0065] When the valve core 20 is in the first position, the two fluid flow paths within the fluid control valve 1 are: first valve port 14a → valve core mounting cavity 13 → first valve core port 24a → first valve core passage 22a → second valve core port 24b → second valve port 14b; and third valve port 14c → third valve core port 24c → second valve core passage 22b → fourth valve core port 24d → fifth valve port 14e. In other words, the first valve port 14a is connected to the second valve port 14b via the first valve core passage 22a, the third valve port 14c is connected to the fifth valve port 14e via the second valve core passage 22b, and the fourth valve port 14d is in an idle state.

[0066] When the valve core 20 is in the second position, the two fluid flow paths within the fluid control valve 1 are: first valve port 14a → valve core mounting cavity 13 → second valve core port 24b → first valve core passage 22a → first valve core port 24a → fifth valve port 14e; and third valve port 14c → fourth valve core port 24d → second valve core passage 22b → third valve core port 24c → fourth valve port 14d. In other words, the first valve port 14a is connected to the fifth valve port 14e via the first valve core passage 22a, and the third valve port 14c is connected to the fourth valve port 14d via the second valve core passage 22b. The second valve port 14b is in an idle state.

[0067] When the valve core 20 is in the third position, the two fluid flow paths within the fluid control valve 1 are: first valve port 14a → valve core mounting cavity 13 → fourth valve core port 24d → second valve core passage 22b → third valve core port 24c → fifth valve port 14e; and second valve port 14b → first valve core port 24a → first valve core passage 22a → second valve core port 24b → fourth valve port 14d. In other words, the first valve port 14a is connected to the fifth valve port 14e via the second valve core passage 22b, and the second valve port 14b is connected to the fourth valve port 14d via the first valve core passage 22a, leaving the third valve port 14c in an idle state.

[0068] It should be noted that, for the first embodiment shown in FIG. 5A , since a valve seat is not installed on the first valve port 14 a , the communication between the first valve port 14 a and the valve core channel must pass through the valve core installation cavity 13 . More specifically, the first valve port 14 a is connected to the third portion g3 of the gap g.

[0069] In the second embodiment shown in FIG. 6A , the valve core 20 can rotate around the rotation axis X relative to the valve body 10 to a first position and a second position.

[0070] When the valve core 20 is in the first position, the two fluid flow paths within the fluid control valve 1 are: first valve port 14a → first valve core port 24a → valve core mounting chamber 13 → second valve core port 24b → second valve port 14b; and third valve port 14c → third valve core port 24c → internal passage 25 → fourth valve core port 24d → fifth valve port 14e. In other words, the first valve port 14a is connected to the second valve port 14b via the valve core mounting chamber 13, the third valve port 14c is connected to the fifth valve port 14e via the internal passage 25, and the fourth valve port 14d is in an idle state.

[0071] When the valve core 20 is in the second position, the two fluid flow paths within the fluid control valve 1 are: first valve port 14a → second valve core port 24b → valve core mounting chamber 13 → first valve core port 24a → fifth valve port 14e; and third valve port 14c → fourth valve core port 24d → internal passage 25 → third valve core port 24c → fourth valve port 14d. In other words, the first valve port 14a is connected to the fifth valve port 14e via the valve core mounting chamber 13, the third valve port 14c is connected to the fourth valve port 14d via the internal passage 25, and the second valve port 14b is in an idle state.

[0072] In this second embodiment, the first valve port 14a communicates with one of the first valve port 24a and the second valve port 24b, which are open to the valve core mounting chamber 13. As shown in FIG7 , after passing through the first valve port 24a or the second valve port 24b, the fluid can flow from one axial side of the valve core 20 to the other axial side of the valve core 20 via the first path 2a or the second path 2b of the balancing passage 2. In the embodiment shown in FIG7 , along the first path 2a of the balancing passage 2, the fluid flows from the second portion g2 of the gap g to the first portion g1, and then to the third portion g3.

[0073] When the spool 20 is in the first position and the second position, the first valve port 14 a can communicate with one of the first spool port 24 a and the second spool port 24 b , respectively.

[0074] As shown in Figure 8 , the fluid control valve 1 further includes a limiting groove 18 on the top of the valve body 11. Accordingly, a limiting pin 29 is provided on the top of the valve core 20. The cooperation between the limiting pin 29 and the limiting groove 18 constrains the rotation angle of the valve core 20, preventing it from exceeding the first, second, or third positions described above.

[0075] Advantageously, the first to fifth valve ports 14a-14e are symmetrically spaced about the rotation axis X on the valve cover 12, i.e., spaced 72° apart from each other. The first to fourth valve core ports 24a-24d are also spaced 72° apart on the valve core 20. As shown in FIG5B or FIG6B , the space between the second valve core port 24a and the third valve core port 24c is left open, or a blind hole may be provided. Thus, the valve core 20 rotates through a 72° angle between the first and second positions, and also through a 72° angle between the first and third positions.

[0076] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be appropriately combined.

[0077] The above is an illustration of the present disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the present disclosure have been described, it will be readily understood by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the claims. It should be understood that the above is an illustration of the present disclosure and that the present disclosure should not be considered as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.

Claims

1. A fluid control valve (1), comprising: A valve body (10), wherein the valve body (10) has a valve core installation cavity (13); a valve core (20), the valve core (20) being installed in the valve core installation cavity (13) and being capable of rotating relative to the valve body (10) around a rotation axis (X); It is characterized in that The fluid control valve (1) has a balancing channel (2), and the balancing channel (2) is located in the valve core installation cavity (13); the balancing channel (2) is connected to both sides of the valve core (20).

2. The fluid control valve (1) according to claim 1, characterized in that: The balancing channel (2) comprises a first path (2a) in the valve core installation cavity (13) which goes from one side of the valve core (20) around the edge of the valve core (20) to the other side of the valve core (20).

3. The fluid control valve (1) according to claim 1, characterized in that: The balancing passage (2) includes a second path (2b) penetrating the valve core (20).

4. The fluid control valve (1) according to any one of claims 1 to 3, characterized in that: The valve body (10) has a first valve port (14a), a second valve port (14b), a third valve port (14c), a fourth valve port (14d) and a fifth valve port (14e), wherein the first valve port (14a) is connected to the balancing channel (2).

5. The fluid control valve (1) according to claim 4, characterized in that: The valve core (20) comprises a core body (21), a first sealing cover (23a) and a second sealing cover (23b), wherein the core body (21) has a first valve core port (24a), a second valve core port (24b), a third valve core port (24c) and a fourth valve core port (24d). The first sealing cover (23a) is connected to the core body (21) and covers the first valve core port (24a) and the second valve core port (24b), so that the first valve core port (24a) and the second valve core port (24b) are sealed and communicated with each other to form a first valve core channel (22a), and Wherein, the second sealing cover (23b) is connected to the core body (21) and covers the third valve core port (24c) and the fourth valve core port (24d), so that the third valve core port (24c) and the fourth valve core port (24d) are sealed and connected to form a second valve core channel (22b).

6. The fluid control valve (1) according to claim 5, characterized in that: The fluid control valve (1) also includes a valve seat (3), which abuts against the valve core (20) and is installed in the second valve port (14b), the third valve port (14c), the fourth valve port (14d) and the fifth valve port (14e) of the valve body (10), and the valve seat (3) seals and connects the corresponding valve port of the valve body (10) and the corresponding valve core port of the valve core (20).

7. The fluid control valve (1) according to claim 5 or 6, characterized in that: The valve core (20) is capable of rotating relative to the valve body (10) around a rotation axis (X) to a first position and a second position. When the valve core (20) is in the first position, the first valve port (14a) is connected to the second valve port (14b) via the first valve core passage (22a), and the third valve port (14c) is connected to the fifth valve port (14e) via the second valve core passage (22b); When the valve core (20) is in the second position, the first valve port (14a) is connected to the fifth valve port (14e) via the first valve core passage (22a), and the third valve port (14c) is connected to the fourth valve port (14d) via the second valve core passage (22b).

8. The fluid control valve (1) according to claim 7, characterized in that: The valve core (20) can also rotate relative to the valve body (10) around the rotation axis (X) to a third position. When the valve core (20) is in the third position, the first valve port (14a) is connected to the fifth valve port (14e) via the second valve core passage (22b), and the second valve port (14b) is connected to the fourth valve port (14d) via the first valve core passage (22a).

9. The fluid control valve (1) according to claim 4, characterized in that: The valve core (20) has a first valve core port (24a), a second valve core port (24b), a third valve core port (24c), a fourth valve core port (24d) and a built-in channel (25), wherein the first valve core port (24a) and the second valve core port (24b) are open to the valve core installation cavity (13), and the third valve core port (24c) and the fourth valve core port (24d) are sealedly connected through the built-in channel (25).

10. The fluid control valve (1) according to claim 9, characterized in that: The fluid control valve (1) also includes a valve seat (3), which abuts against the valve core (20) and is installed in the first valve port (14a), the second valve port (14b), the third valve port (14c), the fourth valve port (14d) and the fifth valve port (14e) of the valve body (10), and the valve seat (3) seals and connects the corresponding valve port of the valve body (10) and the corresponding valve core port of the valve core (20).

11. The fluid control valve (1) according to claim 9 or 10, characterized in that: The valve core (20) is capable of rotating relative to the valve body (10) around the rotation axis (X) to a first rotation position. One position and the second position, When the valve core (20) is in the first position, the first valve port (14a) is connected to the second valve port (14b) via the valve core installation cavity (13), and the third valve port (14c) is connected to the fifth valve port (14e) via the built-in channel (25); When the valve core (20) is in the second position, the first valve port (14a) is connected to the fifth valve port (14e) via the valve core installation cavity (13), and the third valve port (14c) is connected to the fourth valve port (14d) via the built-in channel (25).

12. The fluid control valve (1) according to claim 5 or 9, characterized in that: The valve core (20) also has a through hole (26), and the through hole (26) constitutes a part of the second path (2b) of the balance channel (2).

13. The fluid control valve (1) according to claim 12, characterized in that: The through hole (26) is located between the first valve core port (24a) and the second valve core port (24b) in the circumferential direction of the valve core.

14. The fluid control valve (1) according to claim 6 or 10, characterized in that: The fluid control valve (1) further comprises an elastic member (4), one end of which presses against the valve core (20) along the rotation axis (X), so that the bottom surface of the valve core (20) is biased against the valve seat (3).

15. The fluid control valve (1) according to claim 14, characterized in that: The valve core (20) is provided with an elastic member installation groove (27) at the top, the valve core (20) and the elastic member installation groove (27) are coaxially arranged around the rotation axis (X), and one end of the elastic member (4) is arranged in the elastic member installation groove (27) to abut against the valve core (20).

16. The fluid control valve (1) according to claim 14, characterized in that: The fluid control valve (1) further comprises a bearing (5), and the other end of the elastic member (4) abuts against the top of the valve body (10) via the bearing (5).

17. The fluid control valve (1) according to claim 14, characterized in that: The valve port for installing the valve seat (3) among the first valve port (14a) to the fifth valve port (14e) includes a step portion (15) for supporting the valve seat (3).

18. The fluid control valve (1) according to claim 15, characterized in that: The valve body (10) comprises a valve body (11) and a valve cover (12), wherein the valve cover (12) is detachably mounted on the bottom of the valve body (11) to define the valve core mounting cavity (13), and the first valve port (14a) to the fifth valve port (14e) are all arranged at the bottom of the valve cover (12). On the surface.

19. The fluid control valve (1) according to claim 18, characterized in that: The fluid control valve (1) further comprises an actuating device (6), which is arranged at the top of the valve body (10) and is used to rotate and actuate the valve core (20) relative to the valve body (10) around the rotation axis (X). The top of the valve body (11) is provided with an avoidance hole (16), and the valve core (20) has a valve core shaft (28) extending along the rotation axis (X), and the upper end of the valve core shaft (28) extends to the outside of the valve body (10) through the avoidance hole (16) and is connected to the actuating device (6).

20. The fluid control valve (1) according to claim 19, characterized in that: The valve core shaft (28) is directly connected to the actuating device (6), or The valve core shaft (28) is connected to the actuating device (6) via a transmission device (7).

21. The fluid control valve (1) according to claim 19, characterized in that: The valve cover (12) is provided with a positioning countersunk hole (17), and the lower end of the valve core shaft (28) is rotatably inserted into the positioning countersunk hole (17).

22. The fluid control valve (1) according to claim 19 or 20, characterized in that: A limit groove (18) is also provided on the top of the valve body (11), and a limit pin (29) is provided on the top of the valve core (20). The limit groove (18) cooperates with the limit pin (29) to constrain the rotation angle of the valve core (20).

23. The fluid control valve (1) according to claim 18, characterized in that: The valve cover (12) is also provided with a positioning protrusion (19) protruding from its bottom surface, which is used to locate the angular position of the fluid control valve (1).

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