three-way valve

Abstract

The application relates to the technical field of valves, in particular to a three-way valve. The three-way valve comprises a valve body assembly and a valve core. The valve body assembly is provided with a first valve cavity, a second valve cavity, a third valve cavity, a first valve port and a second valve port. The valve core is movably arranged in the valve body assembly and is in sliding fit with the first valve port and the second valve port. A fluid passage is arranged on the valve core. The three-way valve has a first state, a second state and a third state with the sliding of the valve core. When the three-way valve is in the first state, the first valve cavity and the second valve cavity are communicated through the fluid passage, and the first valve cavity and the second valve cavity are both disconnected with the third valve cavity. When the three-way valve is in the second state, the first valve cavity and the third valve cavity are communicated through the fluid passage, and the first valve cavity and the third valve cavity are both disconnected with the second valve cavity. When the three-way valve is in the third state, the first valve cavity, the second valve cavity and the third valve cavity are all disconnected. The three-way valve provided by the application solves the problem that the existing three-way valve cannot realize full closing of a flow-through hole.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a three-way valve. Background Technology

[0002] In related technologies, three-way valves typically have three flow holes, including one inlet A and two outlets B and C. The valve is driven by a motor to switch the flow holes, allowing A to connect with B while C is closed, or vice versa. In other words, three-way valves can only switch between flow holes and cannot achieve a fully closed position, which limits their application. Summary of the Invention

[0003] Therefore, it is necessary to provide a three-way valve to solve the problem that existing three-way valves cannot achieve full closure of the flow orifice.

[0004] This application provides a three-way valve, which includes a valve body assembly and a valve core. The valve body assembly has a first valve chamber, a second valve chamber, a third valve chamber, a first valve port, and a second valve port. The first valve chamber is located between the second valve chamber and the third valve chamber. The two ends of the first valve port are respectively connected to the first valve chamber and the second valve chamber, and the two ends of the second valve port are respectively connected to the first valve chamber and the third valve chamber. The first valve chamber, the second valve chamber, and the third valve chamber are respectively connected to connecting pipes. The valve core is movably installed in the valve body assembly and slides with both the first valve port and the second valve port. A fluid channel is provided; the three-way valve has a first state, a second state, and a third state as the valve core slides; when the three-way valve is in the first state, the first valve chamber and the second valve chamber are connected through the fluid channel, and both the first valve chamber and the second valve chamber are disconnected from the third valve chamber; when the three-way valve is in the second state, the first valve chamber and the third valve chamber are connected through the fluid channel, and both the first valve chamber and the third valve chamber are disconnected from the second valve chamber; when the three-way valve is in the third state, the first valve chamber, the second valve chamber, and the third valve chamber are all disconnected.

[0005] In one embodiment, the fluid channel includes a first channel, a second channel, a first flow hole, and a second flow hole. The first channel communicates with the second valve chamber, and the first flow hole communicates with the side wall of the first channel. The second channel communicates with the third valve chamber, and the second flow hole communicates with the side wall of the second channel. When the three-way valve is in the first state, the first flow hole communicates with the first valve chamber, and the inner wall of the second valve port blocks the communication between the second flow hole and the first valve chamber. When the three-way valve is in the second state, the second flow hole communicates with the first valve chamber, and the inner wall of the first valve port blocks the communication between the first flow hole and the first valve chamber. When the three-way valve is in the third state, the inner wall of the first valve port blocks the first flow hole, and the inner wall of the second valve port blocks the second flow hole.

[0006] In one embodiment, the fluid passage further includes a third flow hole formed on the side wall of the valve core, the third flow hole communicating with the first passage, and at least a portion of the third flow hole being disposed close to the second passage relative to the first flow hole, wherein the flow area of ​​the third flow hole is smaller than the flow area of ​​the first flow hole; and / or, the fluid passage further includes a fourth flow hole formed on the side wall of the valve core, the fourth flow hole communicating with the second passage, and at least a portion of the fourth flow hole being disposed close to the first passage relative to the second flow hole, wherein the flow area of ​​the fourth flow hole is smaller than the flow area of ​​the second flow hole.

[0007] In one embodiment, the third flow hole is formed on the inner wall of the first flow hole near the second channel; and / or, the fourth flow hole is formed on the inner wall of the second flow hole near the first channel.

[0008] In one embodiment, the outer wall of the valve core is recessed towards its own axis to form a first sealing groove. The first sealing groove is disposed near the second channel relative to the first flow hole. A first sealing element is installed in the first sealing groove. When the three-way valve is in the second state and the third state, the first sealing element is sealed to the inner wall of the first valve port. And / or, the outer wall of the valve core is recessed towards its own axis to form a second sealing groove. The second sealing groove is disposed near the first channel relative to the second flow hole. A second sealing element is installed in the second sealing groove. When the three-way valve is in the first state and the third state, the second sealing element is sealed to the inner wall of the second valve port.

[0009] In one embodiment, the first valve port is provided with a first guide surface at one end near the first valve cavity, and the inner diameter of the first guide surface gradually decreases along the axial direction of the first valve port and from the first valve cavity to the first valve port; and / or, the second valve port is provided with a second guide surface at one end near the first valve cavity, and the inner diameter of the second guide surface gradually decreases along the axial direction of the second valve port and from the first valve cavity to the second valve port.

[0010] In one embodiment, the distance the valve core moves from the position of the third state to the position of the second state is the upper stroke of the valve core, and the distance the valve core moves from the position of the third state to the position of the first state is the lower stroke of the valve core; wherein, the magnitude of the upper stroke is equal to the magnitude of the lower stroke.

[0011] In one embodiment, during the movement of the valve core, both the first valve port and the second valve port are at least partially in contact with and slide against the valve core.

[0012] In one embodiment, the inner wall of the second valve port near the third valve cavity protrudes towards the axis to form a lower limit portion. When the valve core moves to the limit towards the third valve cavity, one end of the valve core along the axis abuts against the lower limit portion. When the valve core abuts against the lower limit portion, the three-way valve is in the first state.

[0013] In one embodiment, the three-way valve further includes a spindle assembly, which is movably mounted within the valve body assembly, and one end of the spindle assembly is connected to the valve core for driving the valve core to move axially. The spindle assembly includes a guide portion. The valve body assembly also has an assembly hole, which is spaced apart from the first valve port and communicates with the second valve cavity. The inner wall of the assembly hole slides in fit with the outer wall of the guide portion.

[0014] In one embodiment, the inner diameter of the first valve port, the inner diameter of the second valve port, and the inner diameter of the mounting hole are equal.

[0015] In one embodiment, the inner wall of the mounting hole at the end away from the second valve cavity protrudes towards the direction close to the axis to form an upper limit portion. When the valve core moves to the limit in the direction away from the second valve port, one end of the guide portion along the axial direction abuts against the upper limit portion. When the guide portion abuts against the upper limit portion, the three-way valve is in the second state.

[0016] In one embodiment, the mandrel assembly further includes a screw and a valve head, one end of the guide portion is movably connected to the screw, and the other end is limitedly connected to the valve head; wherein, the end of the valve head away from the screw is connected to the valve core.

[0017] In one embodiment, the valve core includes a main body and a partition plate, the partition plate being disposed within the main body and connected to the main body; wherein, a connection hole is provided on the partition plate, and the end of the valve head away from the screw is inserted into the connection hole and fixedly connected to the partition plate.

[0018] In one embodiment, the valve body assembly includes a main valve body, a valve port, and an end cap. The valve port is installed in the main valve body and divides the interior of the main valve body to form a first valve chamber and a second valve chamber. The end cap is connected to the end of the main valve body where the first valve chamber is located. The first valve port is located in the valve port, and the second valve port and the third valve chamber are located in the end cap.

[0019] In one embodiment, the valve body assembly further includes a valve seat and a guide sleeve. The valve seat is connected to one end of the main valve body where the second valve cavity is located, and the guide sleeve is disposed in the second valve cavity, with one end of the guide sleeve inserted into and connected to the valve seat.

[0020] Compared with the prior art, the three-way valve provided in this application can open or close the first valve port and the second valve port by sliding the valve core, thereby connecting the first valve chamber and the second valve chamber while the third valve chamber is in a disconnected state, or connecting the first valve chamber and the third valve chamber while the second valve chamber is in a disconnected state, or connecting the first valve chamber, the second valve chamber and the third valve chamber are all in a disconnected state. In this way, the three-way valve achieves the fully closed function and expands the application scenarios. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A cross-sectional view of a three-way valve in a first state according to an embodiment of this application;

[0023] Figure 2 A cross-sectional view of a three-way valve in a second state according to an embodiment of this application;

[0024] Figure 3A cross-sectional view of a three-way valve in a third state according to an embodiment of this application;

[0025] Figure 4 A schematic diagram of the valve core structure provided in this application;

[0026] Figure 5 A cross-sectional view of a valve core according to an embodiment provided in this application;

[0027] Figure 6 A schematic diagram of the valve core according to another embodiment provided in this application;

[0028] Figure 7 A schematic diagram of the valve core of another embodiment provided in this application;

[0029] Figure 8 A partial cross-sectional view (low flow rate) of a three-way valve according to an embodiment provided in this application;

[0030] Figure 9 A partial cross-sectional view (high flow rate) of a three-way valve according to an embodiment provided in this application;

[0031] Figure 10 A cross-sectional view of a mandrel assembly according to an embodiment provided in this application;

[0032] Figure 11 A cross-sectional view of the valve port portion of an embodiment provided in this application;

[0033] Figure 12 A cross-sectional view of an end cap according to an embodiment provided in this application;

[0034] Figure 13 A cross-sectional view of a valve seat according to an embodiment provided in this application;

[0035] Figure 14 A cross-sectional view of a guide sleeve according to an embodiment provided in this application.

[0036] The symbols in the diagram represent the following meanings:

[0037] 100. Three-way valve; 10. Valve body assembly; 11. Main valve body; 111. First valve chamber; 112. Second valve chamber; 113. First interface; 114. Third interface; 115. Third valve chamber; 12. Valve port; 121. First valve port; 1211. First guide surface; 13. End cap; 131. Second valve port; 1311. Second guide surface; 1312. Lower limit part; 132. Second interface; 14. Valve seat; 141. Upper limit part; 15. Guide sleeve; 151. Assembly hole; 20. Valve core; 21. First Channel; 211, First flow hole; 212, Third flow hole; 22, Second channel; 221, Second flow hole; 222, Fourth flow hole; 23, First sealing groove; 231, First seal; 24, Second sealing groove; 241, Second seal; 25, Main body; 26, Partition plate; 261, Connecting hole; 30, Spindle assembly; 31, Guide part; 311, Mounting hole; 32, Screw; 33, Valve head; 34, Bearing; 40, Nut sleeve; 50, First connecting pipe; 60, Second connecting pipe; 70, Third connecting pipe. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0043] In related technologies, three-way valves typically have three flow holes, including one inlet A and two outlets B and C. The valve is driven by a motor to switch the flow holes, allowing A to connect with B while C is closed, or vice versa. In other words, three-way valves can only switch between flow holes and cannot achieve a fully closed position, which limits their application.

[0044] Please see Figures 1-14 To address the problem that existing three-way valves cannot achieve full closure of the flow orifice, this application provides a three-way valve 100. The three-way valve 100 includes a valve body assembly 10 and a valve core 20. The valve body assembly 10 has a first valve chamber 111, a second valve chamber 112, a third valve chamber 115, a first valve port 121, a second valve port 131, a first interface 113, a second interface 132, and a third interface 114. The first valve chamber 111 is located between the second valve chamber 112 and the third valve chamber 115. The two ends of the first valve port 121 are respectively connected to the first valve chamber 111 and the second valve chamber 112. The two ends of the second valve port 131 are respectively connected to the first valve chamber 111 and the third valve chamber 115. The first valve chamber 111, the second valve chamber 112, and the third valve chamber 115 are respectively connected to a connecting pipe. Specifically, the first interface 113 is connected to the side wall of the first valve chamber 111, the second interface 132 is connected to the end of the third valve chamber 115 away from the first valve chamber 111, and the third interface 114 is connected to the side wall of the second valve chamber 112. The first interface 113 is connected to the first connecting pipe 50, the second interface 132 is connected to the second connecting pipe 60, and the third interface 114 is connected to the third connecting pipe 70. Here, the first connecting pipe 50 can be used as the inlet pipe, and the second connecting pipe 60 and the third connecting pipe 70 can both be used as outlet pipes.

[0045] Furthermore, the valve core 20 is movably installed within the valve body assembly 10, and the valve core 20 can be partially inserted into the first valve port 121 and the second valve port 131, and slides with both the first valve port 121 and the second valve port 131. A fluid channel is provided on the valve core 20.

[0046] The three-way valve 100 has a first state, a second state, and a third state as the valve core 20 slides. When the three-way valve 100 is in the first state, the first valve chamber 111 and the second valve chamber 112 are connected through a fluid channel, and both the first valve chamber 111 and the second valve chamber 112 are disconnected from the third valve chamber 115. When the three-way valve 100 is in the second state, the first valve chamber 111 and the third valve chamber 115 are connected through a fluid channel, and both the first valve chamber 111 and the third valve chamber 115 are disconnected from the second valve chamber 112. When the three-way valve 100 is in the third state, the first valve chamber 111, the second valve chamber 112, and the third valve chamber 115 are all disconnected.

[0047] It is understood that this application can open or close the first valve port 121 and the second valve port 131 by sliding the valve core 20, thereby connecting the first valve chamber 111 and the second valve chamber 112 and keeping the third valve chamber 115 in a closed state, or connecting the first valve chamber 111 and the third valve chamber 115 and keeping the second valve chamber 112 in a closed state, or keeping the first valve chamber 111, the second valve chamber 112 and the third valve chamber 115 all in a closed state. In this way, the three-way valve 100 is fully closed, thus expanding the application scenarios.

[0048] Specifically, the fluid passage includes a first passage 21, a second passage 22, a first flow hole 211, and a second flow hole 221. The first passage 21 communicates with the second valve chamber 112, and the first flow hole 211 communicates with the side wall of the first passage 21. The second passage 22 communicates with the third valve chamber 115, and the second flow hole 221 communicates with the side wall of the second passage 22. Thus, as the valve core 20 moves, the flow state of the three-way valve 100 can be changed through the first flow hole 211 and the second flow hole 221.

[0049] When the three-way valve 100 is in the first state, such as Figure 1 As shown, the valve core 20 moves to a position where the first flow hole 211 connects to the first valve chamber 111, and the inner wall of the second valve port 131 blocks the connection between the second flow hole 221 and the first valve chamber 111. At this time, the refrigerant entering the first valve chamber 111 from the first interface 113 can smoothly flow into the first channel 21 of the valve core 20 through the first flow hole 211, and further flow into the second valve chamber 112, and finally flow out from the third connector 70 at the third interface 114, thus forming a first flow path connecting the first connector 50 and the third connector 70, while the second flow path corresponding to the second connector 60 is in a cut-off state.

[0050] When the three-way valve 100 is in the second state, such as Figure 2 As shown, the valve core 20 moves to a position where the second flow hole 221 connects to the first valve chamber 111, and the inner wall of the first valve port 121 blocks the connection between the first flow hole 211 and the first valve chamber 111. At this time, the refrigerant entering the first valve chamber 111 from the first interface 113 can smoothly flow into the second channel 22 of the valve core 20 through the second flow hole 221, and further flow into the third valve chamber 115, and finally flow out from the second connector 60 at the second interface 132, thus forming a second flow path connecting the first connector 50 and the second connector 60, while the first flow path corresponding to the third connector 70 is in a cut-off state.

[0051] When the three-way valve 100 is in the third state, such as Figure 3 As shown, the valve core 20 moves to the position where the inner wall of the first valve port 121 blocks the first flow hole 211, and the inner wall of the second valve port 131 blocks the second flow hole 221. At this time, both flow paths in the three-way valve 100 are in the closed state, thereby enabling the three-way valve 100 to be fully closed.

[0052] In summary, this application creates a first channel 21 and a second channel 22 on the valve core 20, and creates a first flow hole 211 on the side wall of the first channel 21 and a second flow hole 221 on the side wall of the second channel 22. Thus, during the movement of the valve core 20, the outer wall of the valve core 20 can cooperate with the inner walls of the first valve port 121 and the second valve port 131 to open either the first flow hole 211 or the second flow hole 221, while the other remains closed, thereby achieving refrigerant flow through a single path. Alternatively, the first flow hole 211 may be blocked by the inner wall of the first valve port 121, and the second flow hole 221 may be blocked by the inner wall of the second valve port 131, thereby achieving full closure of the three-way valve 100.

[0053] To improve the sealing performance of the first valve port 121 in the second and third states, i.e., when the first valve port 121 is closed, in one embodiment, such as Figures 2-7 As shown, the outer wall of the valve core 20 is recessed towards its own axis to form a first sealing groove 23. The first sealing groove 23 is positioned relative to the first flow hole 211 and close to the second channel 22. A first sealing element 231 is installed in the first sealing groove 23. When the three-way valve 100 is in the second and third states, the first sealing element 231 seals against the inner wall of the first valve port 121. This prevents refrigerant from leaking from the gap between the first valve port 121 and the valve core 20, thereby improving the reliability of the three-way valve 100 during use.

[0054] Furthermore, a first guide surface 1211 is provided at the end of the first valve port 121 near the first valve cavity 111. Along the axial direction of the first valve port 121 and from the first valve cavity 111 to the first valve port 121, the inner diameter of the first guide surface 1211 gradually decreases. Thus, as the valve core 20 moves towards the first valve port 121, the first seal 231 can more smoothly enter the first valve port 121 to achieve a seal. This reduces the difficulty of moving the valve core 20 and also avoids damage caused by excessive pressure between the first seal 231 and the end of the first valve port 121, thereby extending the service life of the first seal 231.

[0055] To improve the sealing performance of the second valve port 131 in the first and third states, i.e., when the second valve port 131 is closed, in one embodiment, such as Figure 1 and Figures 3-7 As shown, the outer wall of the valve core 20 is recessed towards its own axis to form a second sealing groove 24. The second sealing groove 24 is positioned near the first channel 21 relative to the second flow hole 221. A second sealing element 241 is installed in the second sealing groove 24. When the three-way valve 100 is in the first and third states, the second sealing element 241 seals against the inner wall of the second valve port 131. This prevents refrigerant from leaking from the gap between the second valve port 131 and the valve core 20, thereby improving the reliability of the three-way valve 100 during use.

[0056] Furthermore, a second guide surface 1311 is provided at the end of the second valve port 131 near the first valve cavity 111. Along the axial direction of the second valve port 131 and from the first valve cavity 111 to the second valve port 131, the inner diameter of the second guide surface 1311 gradually decreases. Thus, as the valve core 20 moves towards the second valve port 131, the second seal 241 can more smoothly enter the second valve port 131 to achieve a seal. This reduces the difficulty of moving the valve core 20 and also avoids damage caused by excessive pressure between the second seal 241 and the end of the second valve port 131, thereby extending the service life of the second seal 241.

[0057] In one embodiment, such as Figure 6 and Figure 7As shown, the fluid channel also includes a third flow hole 212 formed on the side wall of the valve core 20. The third flow hole 212 communicates with the first channel 21, and at least a portion of the third flow hole 212 is positioned closer to the second channel 22 relative to the first flow hole 211. The flow area of ​​the third flow hole 212 is smaller than that of the first flow hole 211. Thus, as the valve core 20 moves toward the position corresponding to the first state, it can first achieve communication between the first valve chamber 111 and the first channel 21 through the third flow hole 212. Furthermore, since the flow area of ​​the third flow hole 212 is smaller, a small opening and small flow rate of refrigerant can be achieved using the third flow hole 212. As the valve core 20 continues to move, a large opening and large flow rate of refrigerant can be achieved through the first flow hole 211 and the third flow hole 212.

[0058] Here, the third flow hole 212 can be set separately or opened on the inner wall of the first flow hole 211 near the second channel 22 to reduce the processing difficulty.

[0059] In another embodiment, such as Figure 6 and Figure 7 As shown, the fluid passage also includes a fourth flow hole 222 formed on the side wall of the valve core 20. The fourth flow hole 222 communicates with the second passage 22, and at least a portion of the fourth flow hole 222 is disposed close to the first passage 21 relative to the second flow hole 221. The flow area of ​​the fourth flow hole 222 is smaller than the flow area of ​​the second flow hole 221. Thus, as... Figure 8 and Figure 9 As shown, during the movement of the valve core 20 toward the position corresponding to the second state, it can first achieve the connection between the first valve chamber 111 and the second channel 22 through the fourth flow hole 222. Furthermore, since the flow area of ​​the fourth flow hole 222 is smaller, the refrigerant can be flowed with a small opening and a small flow rate through the fourth flow hole 222. As the valve core 20 continues to move, the refrigerant can be flowed with a large opening and a large flow rate through the second flow hole 221 and the fourth flow hole 222.

[0060] Here, the fourth flow hole 222 can be set separately or opened on the inner wall of the second flow hole 221 near the first channel 21 to reduce the processing difficulty.

[0061] In summary, the opening of the third flow hole 212 and the fourth flow hole 222 can meet the diverse flow channel designs of the valve core 20, and is conducive to controlling the movement of the valve core 20 according to actual needs to meet the flow requirements of small or large flow rates.

[0062] It should be noted that, in order to ensure sealing, the first sealing groove 23 is positioned closer to the second channel 22 relative to the third flow hole 212, and the second sealing groove 24 is positioned closer to the first channel 21 relative to the fourth flow hole 222. This ensures that when the corresponding valve port is cut off, the sealing position is closer to the first valve cavity 111.

[0063] In one embodiment, such as Figure 4 and Figure 6 As shown, the first flow hole 211 and / or the second flow hole 221 are configured as circular holes. In another embodiment, as shown... Figure 7 As shown, the first flow hole 211 and / or the second flow hole 221 can also be configured as rectangular holes. Both round and rectangular holes are easy to process and can reduce the processing difficulty.

[0064] When the first flow hole 211 is configured as a rectangular hole, multiple third flow holes 212 can be formed on the inner wall of the rectangular hole near the second channel 22. If the first flow hole 211 is a circular hole, it is preferable to form one third flow hole 212 on the inner wall of the circular hole near the second channel 22. Similarly, when the second flow hole 221 is configured as a rectangular hole, multiple fourth flow holes 222 can be formed on the inner wall of the rectangular hole near the first channel 21. If the second flow hole 221 is a circular hole, it is preferable to form one fourth flow hole 222 on the inner wall of the circular hole near the first channel 21. This facilitates processing and ensures the reliability of the orifice throttling.

[0065] Specifically, in this embodiment, the number of first flow holes 211 is configured to be multiple, and the multiple first flow holes 211 are arranged at intervals along the circumference of the valve core 20. The number of second flow holes 221 is configured to be multiple, and the multiple first flow holes 211 are arranged at intervals along the circumference of the valve core 20. In this way, the flow performance of the refrigerant is guaranteed and the increase in flow resistance is avoided.

[0066] In one embodiment, such as Figures 1-3 As shown, during the movement of the valve core 20, both the first valve port 121 and the second valve port 131 are at least partially in contact with and slidingly engaged with the valve core 20. That is, the valve core 20 always maintains contact and engagement with the first valve port 121 and the second valve port 131, thus ensuring reliable guidance under high-pressure refrigerant impact through the inner walls of the first valve port 121 and the second valve port 131, thereby improving the movement stability of the valve core 20.

[0067] Optionally, in the axial direction of the second valve port 131, the end of the second valve port 131 near the first valve port 121 is higher than the central axis of the first interface 113, so as to further reduce the direct impact of the refrigerant on the valve core 20.

[0068] In one embodiment, the distance the valve core 20 moves from the third state position to the second state position is the upper stroke of the valve core 20, and the distance the valve core 20 moves from the third state position to the first state position is the lower stroke of the valve core 20. The magnitude of the upper stroke is equal to the magnitude of the lower stroke, which helps to reduce the design difficulty of the valve core 20's stroke. Furthermore, the valve core 20 is preferably configured with a symmetrical structure to further reduce design difficulty.

[0069] like Figure 1 As shown, the inner wall of the second valve port 131 near the third valve chamber 115 protrudes towards the axis to form a lower limit portion 1312. When the valve core 20 moves to its limit towards the third valve chamber 115, one axial end of the valve core 20 abuts against the lower limit portion 1312. When the valve core 20 abuts against the lower limit portion 1312, the three-way valve 100 is in its first state. That is, the lower limit portion 1312 limits the downward stroke of the valve core 20, thereby improving the reliability of the valve core 20's movement.

[0070] Specifically, the lower limit part 1312 is a stepped structure formed on the inner wall of the second valve port 131.

[0071] In one embodiment, such as Figure 10 As shown, the three-way valve 100 also includes a spindle assembly 30, which is movably mounted within the valve body assembly 10. One end of the spindle assembly 30 is connected to the valve core 20 for driving the valve core 20 to move axially. The spindle assembly 30 includes a guide portion 31. The valve body assembly 10 also has a mounting hole 151, which is spaced apart from the first valve port 121 and communicates with the second valve chamber 112. The inner wall of the mounting hole 151 slides in engagement with the outer wall of the guide portion 31. That is, the guide portion 31 can guide and engage with the mounting hole 151, thereby further improving the coaxiality of the valve core 20 during movement.

[0072] Furthermore, an upper limit portion 141 is formed on the inner wall of the mounting hole 151 at the end away from the second valve chamber 112, protruding towards the axis. When the valve core 20 moves to its limit in the direction away from the second valve port 131, one axial end of the guide portion 31 abuts against the upper limit portion 141. When the guide portion 31 abuts against the upper limit portion 141, the three-way valve 100 is in its second state. That is, the upper limit portion 141 limits the stroke of the valve core 20, thereby improving the reliability of the valve core 20's movement.

[0073] Specifically, the upper limit part 141 is a stepped structure formed on the inner wall of the mounting hole 151, which can be specifically provided on the valve seat 14 described below.

[0074] In one embodiment, the inner diameters of the first valve port 121, the second valve port 131, and the mounting hole 151 are equal. This ensures pressure balance during the movement of the valve core 20, reduces adverse effects on the valve core 20 due to pressure differences, and thus guarantees the effectiveness and reliability of the valve core 20 during movement.

[0075] In one embodiment, such as Figure 10 As shown, the spindle assembly 30 also includes a screw 32 and a valve head 33. One end of the guide portion 31 is movably connected to the screw 32, and the other end is limitedly connected to the valve head 33. The three-way valve 100 also includes a nut sleeve 40. The screw 32 passes through the nut sleeve 40 and is threadedly connected to it, converting the circumferential rotation of the screw 32 into axial movement of the spindle assembly 30. The valve head 33, located away from the screw 32, is connected to the valve core 20, thereby driving the valve core 20 to move axially.

[0076] Specifically, such as Figure 5 As shown, the valve core 20 includes a main body 25 and a partition 26. The partition 26 is disposed within and connected to the main body 25, and divides the interior of the main body 25 into a first channel 21 and a second channel 22. A connection hole 261 is provided on the partition 26, and the end of the valve head 33 away from the screw 32 is inserted into the connection hole 261 and fixedly connected to the partition 26. Thus, the valve core 20 has a simple structure, is easy to manufacture, and facilitates the connection between the valve core 20 and the spindle assembly 30.

[0077] To ensure the reliability of the connection between the valve core 20 and the valve head 33, and to prevent internal leakage from the first channel 21 and the second channel 22 at the connection hole 261, the valve head 33 can be installed into the connection hole 261 and then fixed by welding to ensure sealing.

[0078] Furthermore, the spindle assembly 30 also includes a bearing 34. A mounting hole 311 is provided within the guide portion 31, and the bearing 34 is installed within the mounting hole 311 and can rotate relative to the guide portion 31. The screw 32 passes through the guide portion 31 and is connected to the inner ring of the bearing 34. The bottom wall of the mounting hole 311 and the valve head 33 axially stop at both ends of the outer ring of the bearing 34. This ensures the reliability of the bearing 34's installation. Simultaneously, the bearing 34 prevents the valve head 33 and valve core 20 from rotating with the screw 32, thereby preventing rotational friction between the valve core 20 and the first valve port 121 and the second valve port 131, significantly extending its service life.

[0079] In one embodiment, such as Figure 1 , Figure 11 and Figure 12As shown, the valve body assembly 10 includes a main valve body 11, a valve port portion 12, and an end cap 13. The valve port portion 12 is installed inside the main valve body 11, dividing the interior of the main valve body 11 into a first valve chamber 111 and a second valve chamber 112. The end cap 13 is connected to the end of the main valve body 11 where the first valve chamber 111 is located. The first valve port 121 is located in the valve port portion 12, while the second valve port 131, the third valve chamber 115, and the second interface 132 are all located in the end cap 13. This allows for the separate machining of the first valve port 121 and the second valve port 131 before assembly, which improves machining accuracy and reduces machining difficulty.

[0080] Furthermore, in one embodiment, as Figure 13 and Figure 14 As shown, the valve body assembly 10 also includes a valve seat 14 and a guide sleeve 15. The valve seat 14 is connected to one end of the main valve body 11 where the second valve chamber 112 is located. The guide sleeve 15 is located inside the second valve chamber 112, and one end of the guide sleeve 15 is inserted into and connected to the valve seat 14. This facilitates the guiding function of the spindle assembly 30.

[0081] Specifically, after being connected to the valve seat 14, the guide sleeve 15 forms the aforementioned mounting hole 151. Furthermore, along the axial direction of the guide sleeve 15, the end of the guide sleeve 15 away from the valve seat 14 is not higher than the inner wall of the third connecting pipe 70 near the valve seat 14, in order to further reduce the impact of the high-pressure refrigerant on the spindle assembly 30 and improve the coaxiality of the spindle assembly 30 and the valve core 20 during movement.

[0082] In the assembly of the three-way valve 100 provided in this application, the main valve body 11, valve port 12, first connecting pipe 50, third connecting pipe 70, and corresponding copper sleeves are first assembled and welded to form a first assembly. The end cap 13, second connecting pipe 60, and corresponding copper sleeves are then assembled and welded to form a second assembly. The valve seat 14 and guide sleeve 15 are assembled and welded to form a third assembly. The spindle assembly 30 and valve core 20 are then assembled and welded to form a fourth assembly. Next, the spindle assembly 30 of the fourth assembly is inserted into the valve seat 14 and guide sleeve 15 of the third assembly to achieve a sliding fit. The valve seat 14 is then pressed into the main valve body 11 of the first assembly and welded to form a fixed assembly. Simultaneously, the end cap 13 of the second assembly is pressed into the main valve body 11 of the first assembly and welded to form a fixed assembly. At this time, the valve core 20 is inserted into the first valve port 121 and the second valve port 131 respectively, forming a sliding fit with the first valve port 121 and the second valve port 131. Finally, the rotor and other components are assembled to form the three-way valve 100.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A three-way valve, characterized in that, The device includes a valve body assembly (10) and a valve core (20). The valve body assembly (10) has a first valve chamber (111), a second valve chamber (112), a third valve chamber (115), a first valve port (121), and a second valve port (131). The first valve chamber (111) is located between the second valve chamber (112) and the third valve chamber (115). The two ends of the first valve port (121) are respectively connected to the first valve chamber (111) and the second valve chamber (112). The two ends of the second valve port (131) are respectively connected to the first valve chamber (111) and the third valve chamber (115). The first valve chamber (111), the second valve chamber (112), and the third valve chamber (115) are respectively connected to pipes. The valve core (20) is movably installed in the valve body assembly (10) and slides with both the first valve port (121) and the second valve port (131). A fluid channel is provided on the valve core (20). The three-way valve has a first state, a second state and a third state as the valve core (20) slides; When the three-way valve is in the first state, the first valve chamber (111) and the second valve chamber (112) are connected through the fluid channel, and both the first valve chamber (111) and the second valve chamber (112) are disconnected from the third valve chamber (115). When the three-way valve is in the second state, the first valve chamber (111) and the third valve chamber (115) are connected through the fluid channel, and the first valve chamber (111) and the third valve chamber (115) are both disconnected from the second valve chamber (112); When the three-way valve is in the third state, the first valve chamber (111), the second valve chamber (112), and the third valve chamber (115) are all disconnected.

2. The three-way valve according to claim 1, characterized in that, The fluid channel includes a first channel (21), a second channel (22), a first flow hole (211), and a second flow hole (221). The first channel (21) is connected to the second valve chamber (112), and the first flow hole (211) is connected to the side wall of the first channel (21). The second channel (22) is connected to the third valve chamber (115), and the second flow hole (221) is connected to the side wall of the second channel (22). When the three-way valve is in the first state, the first flow hole (211) connects to the first valve chamber (111), and the inner wall of the second valve port (131) blocks the connection between the second flow hole (221) and the first valve chamber (111). When the three-way valve is in the second state, the second flow hole (221) connects to the first valve chamber (111), and the inner wall of the first valve port (121) blocks the connection between the first flow hole (211) and the first valve chamber (111). When the three-way valve is in the third state, the inner wall of the first valve port (121) is blocked in the first flow hole (211), and the inner wall of the second valve port (131) is blocked in the second flow hole (221).

3. The three-way valve according to claim 2, characterized in that, The fluid passage further includes a third flow hole (212) opened on the side wall of the valve core (20), the third flow hole (212) is connected to the first passage (21), and at least a portion of the third flow hole (212) is disposed close to the second passage (22) relative to the first flow hole (211), wherein the flow area of ​​the third flow hole (212) is smaller than the flow area of ​​the first flow hole (211); And / or, the fluid passage further includes a fourth flow hole (222) formed on the side wall of the valve core (20), the fourth flow hole (222) communicating with the second channel (22), and at least a portion of the fourth flow hole (222) being disposed close to the first channel (21) relative to the second flow hole (221), wherein the flow area of ​​the fourth flow hole (222) is smaller than the flow area of ​​the second flow hole (221).

4. The three-way valve according to claim 3, characterized in that, The third flow hole (212) is opened on the inner wall of the first flow hole (211) near the second channel (22); And / or, the fourth flow hole (222) is formed on the inner wall of the second flow hole (221) on the side near the first channel (21).

5. The three-way valve according to any one of claims 2-4, characterized in that, The outer wall of the valve core (20) is recessed towards its own axis to form a first sealing groove (23). The first sealing groove (23) is located near the second channel (22) relative to the first flow hole (211). A first sealing element (231) is installed in the first sealing groove (23). When the three-way valve is in the second state and the third state, the first sealing element (231) seals against the inner wall of the first valve port (121). And / or, the outer side wall of the valve core (20) is recessed in a direction close to its own axis to form a second sealing groove (24). The second sealing groove (24) is disposed close to the first channel (21) relative to the second flow hole (221). A second sealing element (241) is installed in the second sealing groove (24). When the three-way valve is in the first state and the third state, the second sealing element (241) is sealed and engaged with the inner wall of the second valve port (131).

6. The three-way valve according to claim 5, characterized in that, The first valve port (121) has a first guide surface (1211) at one end near the first valve cavity (111). Along the axial direction of the first valve port (121) and from the first valve cavity (111) to the first valve port (121), the inner diameter of the first guide surface (1211) gradually decreases. And / or, the second valve port (131) is provided with a second guide surface (1311) at one end near the first valve cavity (111), and the inner diameter of the second guide surface (1311) gradually decreases along the axial direction of the second valve port (131) and from the first valve cavity (111) to the second valve port (131).

7. The three-way valve according to claim 1, characterized in that, The distance from the position of the valve core (20) in the third state to the position in the second state is the upper stroke of the valve core (20), and the distance from the position of the valve core (20) in the third state to the position in the first state is the lower stroke of the valve core (20). Wherein, the size of the upper stroke is equal to the size of the lower stroke.

8. The three-way valve according to claim 1, characterized in that, During the movement of the valve core (20), both the first valve port (121) and the second valve port (131) are at least partially in contact with and slide against the valve core (20).

9. The three-way valve according to claim 1, characterized in that, The inner wall of the second valve port (131) near the third valve chamber (115) protrudes in a direction close to the axis to form a lower limit part (1312). When the valve core (20) moves to the limit in a direction close to the third valve chamber (115), one end of the valve core (20) along the axis abuts against the lower limit part (1312). When the valve core (20) abuts against the lower limit part (1312), the three-way valve is in the first state.

10. The three-way valve according to claim 1, characterized in that, The three-way valve also includes a spindle assembly (30), which is movably installed in the valve body assembly (10), and one end of the spindle assembly (30) is connected to the valve core (20) for driving the valve core (20) to move axially. The spindle assembly (30) includes a guide portion (31). The valve body assembly (10) is also provided with an assembly hole (151), which is spaced apart from the first valve port (121) and communicates with the second valve cavity (112), and the inner wall of the assembly hole (151) slides in cooperation with the outer wall of the guide part (31).

11. The three-way valve according to claim 10, characterized in that, The inner diameter of the first valve port (121), the inner diameter of the second valve port (131), and the inner diameter of the assembly hole (151) are equal.

12. The three-way valve according to claim 10, characterized in that, The inner wall of the assembly hole (151) at the end away from the second valve chamber (112) protrudes in a direction close to the axis to form an upper limit part (141). When the valve core (20) moves to the limit in a direction away from the second valve port (131), one end of the guide part (31) along the axial direction abuts against the upper limit part (141). When the guide part (31) abuts against the upper limit part (141), the three-way valve is in the second state.

13. The three-way valve according to claim 10, characterized in that, The spindle assembly (30) also includes a screw (32) and a valve head (33). One end of the guide portion (31) is movably connected to the screw (32), and the other end is limitedly connected to the valve head (33). The valve head (33) is connected to the valve core (20) at the end away from the screw (32).

14. The three-way valve according to claim 13, characterized in that, The valve core (20) includes a main body (25) and a partition (26), wherein the partition (26) is disposed inside the main body (25) and connected to the main body (25); The partition plate (26) has a connection hole (261), and the end of the valve head (33) away from the screw (32) is inserted into the connection hole (261) and fixedly connected to the partition plate (26).

15. The three-way valve according to claim 1, characterized in that, The valve body assembly (10) includes a main valve body (11), a valve port (12), and an end cap (13). The valve port (12) is installed inside the main valve body (11) and divides the interior of the main valve body (11) to form a first valve chamber (111) and a second valve chamber (112). The end cap (13) is connected to the end of the main valve body (11) where the first valve chamber (111) is located. The first valve port (121) is located in the valve port portion (12), and the second valve port (131) and the third valve chamber (115) are located in the end cap (13).

16. The three-way valve according to claim 15, characterized in that, The valve body assembly (10) further includes a valve seat (14) and a guide sleeve (15). The valve seat (14) is connected to one end of the main valve body (11) where the second valve chamber (112) is located. The guide sleeve (15) is located in the second valve chamber (112), and one end of the guide sleeve (15) is inserted into and connected to the valve seat (14).

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