Valve device and refrigeration system thereof

Abstract

The utility model relates to refrigeration technical field especially, and it is a kind of valve device and refrigerating system thereof. Valve device includes valve body and valve core, valve body constructs valve cavity and the first import, second import and outlet that are all communicated with valve cavity, and outlet is arranged with angle to valve cavity;The inner wall of valve cavity is equipped with first limit seat and second limit seat, and first limit seat and second limit seat protrude along the direction of radially inward, and first limit seat and second limit seat are located at both ends of valve core, and it is respectively structured with first valve port and second valve port, along with the movement of valve core, valve core can be abutted with first valve port to block first import, or abutted with second valve port to block second import. Its advantage lies in, the abutment of valve core and inclined plane is more closely, and contact area is smaller, so unit area pressure is greater, improves the abutment sealing property of valve core and first limit seat and second limit seat, prevents medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a valve device and its refrigeration system. Background Technology

[0002] In existing pipeline systems, a single check valve can only allow fluid to flow in one direction. Multiple check valves are required for multiple flow directions, resulting in a large number of pipelines and complex control.

[0003] The technical problem this application aims to solve is how to simplify the number of pipelines and simplify control. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a valve device.

[0005] A valve device includes: a valve body having a valve cavity and a first inlet, a second inlet, and an outlet all communicating with the valve cavity; a valve core installed in the valve cavity and movable along the valve cavity; wherein, the inner wall of the valve cavity is provided with a first limiting seat and a second limiting seat, the first limiting seat and the second limiting seat being located at both ends of the valve core, the first limiting seat having a first valve port on the side facing the valve core, and the second limiting seat having a second valve port on the side facing the valve core, and as the valve core moves, the valve core can abut against the first valve port to block the first inlet, or abut against the second valve port to block the second inlet.

[0006] With this configuration, the valve device utilizes the pressure difference between the inlet and outlet fluids to connect two different flow directions. When the valve core blocks the first inlet, the second inlet and outlet are connected; when the valve core blocks the second inlet, the first inlet and outlet are connected. Therefore, the movement of the valve core can create two flow paths, allowing for selective flow. This reduces the number of pipes and simplifies control. Furthermore, the valve cavity is equipped with a first limit seat and a second limit seat, each with a contact point to abut the valve core, ensuring greater stability after the valve core reaches the preset position.

[0007] In one embodiment, the axis of the first inlet, the axis of the second inlet, and the axis of the valve cavity are located on the same straight line, and the axis of the outlet is set at an angle to the axis of the valve cavity.

[0008] In one embodiment, the first limiting seat protrudes from the inner wall of the valve cavity; and / or, the second limiting seat protrudes from the inner wall of the valve cavity.

[0009] In one embodiment, the first valve port has a conical cross-section along the axis of the valve cavity; the opening area of ​​the first valve port facing the valve cavity is larger than its opening area facing the first inlet; and / or, the second valve port has a conical cross-section along the axis of the valve cavity; the opening area of ​​the second valve port facing the valve cavity is larger than its opening area facing the second inlet.

[0010] In one embodiment, the outer periphery of the first limiting seat is provided with a first sealing groove, and a third sealing element is provided in the first sealing groove, the third sealing element abutting against the inner wall of the valve cavity; and / or, the outer periphery of the second limiting seat is provided with a second sealing groove, and a fourth sealing element is provided in the second sealing groove, the fourth sealing element abutting against the inner wall of the valve cavity.

[0011] In one embodiment, the inner wall of the valve cavity is provided with a first limiting member, the first limiting member being fixed to the side of the first limiting seat near the first inlet and abutting against the first limiting seat; and / or, the inner wall of the valve cavity is provided with a second limiting member, the second limiting member being fixed to the side of the second limiting seat near the second inlet and abutting against the second limiting seat. In one embodiment, the valve core also has at least one inner hole and at least one outer groove, the inner hole extending along the axis of the valve core, and the outer groove being formed on the outer periphery of the valve core.

[0012] In one embodiment, the valve core has a first groove and a second groove at its two ends, and a first seal and a second seal are respectively embedded in the first groove and the second groove. As the valve core moves, the first seal abuts against the first valve port and the second seal abuts against the second valve port.

[0013] In one embodiment, the outer periphery of the valve core is provided with multiple spaced guide ribs, which protrude from the outer periphery of the valve core and are in movable cooperation with the inner wall of the valve cavity.

[0014] In one embodiment, the valve core has a first end near a first inlet and a second end near a second inlet, the guide rib extends along the axial direction of the valve core, and the end of the guide rib near the first end is provided with a third abutting slope, the third abutting slope abutting against the first limiting seat, and the end of the guide rib near the second end is provided with a fourth abutting slope, the fourth abutting slope abutting against the second limiting seat.

[0015] In one embodiment, the guide rib is provided with a first protrusion and a second protrusion that are movably fitted with the inner wall of the valve cavity. The maximum distance between the first protrusion and the second protrusion is L1, and the inner diameter of the valve cavity is set to D, satisfying: L1 > D.

[0016] In one embodiment, along the axial direction of the valve body, the maximum distance between the side of the first limiting seat near the valve core and the outlet is L2; ​​when the valve core abuts against the first limiting seat, the maximum distance between the side of the first limiting seat near the valve core and the second protrusion is L3, satisfying: L3 > L2; and / or, along the axial direction of the valve body, the maximum distance between the side of the second limiting seat near the valve core and the outlet is L4; when the valve core abuts against the second limiting seat, the maximum distance between the side of the second limiting seat near the valve core and the first protrusion is L5, satisfying: L5 > L4.

[0017] This utility model also provides a refrigeration system, including the valve device as described above. The refrigeration system further includes a first condenser and a second condenser, both of which are connected to the valve device and are arranged in parallel.

[0018] This utility model uses a valve device in conjunction with two condensers to replace the traditional scheme of setting two one-way valves separately. The valve cavity is provided with a first limiting seat and a second limiting seat. The first limiting seat and the second limiting seat are respectively provided with a first valve port and a second valve port for abutting against the valve core. The first valve port and the second valve port are inclined, so the abutment between the valve core and the inclined surface is tighter and the contact area is smaller, so the pressure per unit area is greater, which improves the sealing performance of the abutment between the valve core and the first limiting seat and the second limiting seat and prevents the medium from leaking. Attached Figure Description

[0019] Figure 1 A cross-sectional view of one embodiment of the valve device provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of one embodiment of the valve core provided by this utility model;

[0021] Figure 3 A partial structural schematic diagram of one embodiment of the valve core provided by this utility model;

[0022] Figure 4 A schematic diagram of the refrigeration system provided by this utility model;

[0023] Figure 5 A schematic diagram of another embodiment of the refrigeration system provided by this utility model;

[0024] Figure 6 A cross-sectional view of the valve core moving to another position in the valve device provided by this utility model.

[0025] The symbols in the diagram represent the following meanings:

[0026] 100. Valve assembly; 10. Valve body; 11. First inlet; 12. Second inlet; 13. Outlet; 131. Expanding section; 132. Reducing section; 14. Valve cavity; 15. First limiting seat; 151. First sealing groove; 152. Third sealing element; 153. First valve port; 16. Second limiting seat; 161. Second valve port; 20. Valve core; 21. Inner hole; 22. Outer groove; 23. First groove; 231. First sealing element; 24. Second groove; 241. Second sealing element; 25. Guide rib; 251. Third abutting slope; 252. First protrusion; 253. Fourth abutting slope; 254. Second protrusion; 30. Limiting element; 201. First condenser; 202. Second condenser; 300. Compressor; 301. Solenoid three-way valve; 302. Solenoid valve. Detailed Implementation

[0027] 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.

[0028] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected to" another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism. 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Please see Figures 1-3 This utility model provides a valve device 100, which is applied in a refrigeration system and can replace at least two one-way valves to control the on / off connection between two condensers and pipelines in the refrigeration system.

[0033] The valve device 100 includes a valve body 10 and a valve core 20. The valve body 10 is configured with a valve cavity 14 and a first inlet 11, a second inlet 12, and an outlet 13, all of which are connected to the valve cavity 14. The valve core 20 is installed in the valve cavity 14 and can move along the valve cavity 14. The inner wall of the valve cavity 14 is provided with a first limiting seat 15 and a second limiting seat 16. The first limiting seat 15 and the second limiting seat 16 are located at both ends of the valve core 20. The side of the first limiting seat 15 facing the valve core 20 is configured with a first valve port 153, and the side of the second limiting seat 16 facing the valve core 20 is configured with a second valve port 161. As the valve core 20 moves, the valve core 20 can abut against the first valve port 153 to block the first inlet 11, or abut against the second valve port 161 to block the second inlet 12.

[0034] Thus, the valve device 100 utilizes the pressure difference between the inlet and outlet fluids to connect two different flow directions. When the valve core 20 blocks the first inlet 11, the second inlet 12 and outlet 13 are connected; when the valve core 20 blocks the second inlet 12, the first inlet 11 and outlet 13 are connected. Therefore, the movement of the valve core 20 can create two flow paths, allowing for selective flow. The valve device 100 can reduce the number of pipelines and simplify control. Furthermore, the valve cavity 14 is equipped with a first limiting seat 15 and a second limiting seat 16, making the valve core 20 more stable after reaching the preset position.

[0035] That is, in this embodiment, the valve device 100 is configured as a three-way valve.

[0036] Furthermore, both the first valve port 153 and the second valve port 161 are set as inclined surfaces, making the contact between the valve core 20 and the inclined surface tighter and the contact area smaller, thus increasing the pressure per unit area. This improves the sealing performance of the valve core 20 with the first limit seat 15 and the second limit seat 16, preventing media leakage.

[0037] The first limiting seat 15 protrudes from the inner wall of the valve cavity 14, and / or the second limiting seat 16 protrudes from the inner wall of the valve cavity 14 so as to abut against the valve core 20.

[0038] The first valve port 153 has a conical cross-section along the axis of the valve cavity 14; the opening area of ​​the first valve port 153 facing the valve cavity 14 is larger than its opening area facing the first inlet 11; and / or, the second valve port 161 has a conical cross-section along the axis of the valve cavity 14; the opening area of ​​the second valve port 161 facing the valve cavity 14 is larger than its opening area facing the second inlet 12. Thus, the conical structure can guide the flow direction of the fluid medium, reducing turbulence and loss of medium velocity.

[0039] Furthermore, the outer periphery of the first limiting seat 15 is provided with a first sealing groove 151, and a third sealing element 152 is provided within the first sealing groove 151, the third sealing element 152 abutting against the inner wall of the valve cavity 14. Thus, the sealing performance between the first limiting seat 15 and the valve cavity 14 is improved through the sealing element, further preventing media leakage. And / or, the outer periphery of the second limiting seat 16 is provided with a second sealing groove, and a fourth sealing element is provided within the second sealing groove, the fourth sealing element abutting against the inner wall of the valve cavity 14.

[0040] Based on this, the first limiting seat 15 can be detachably connected to the valve body 10. Therefore, the first limiting seat 15 and the valve body 10 can be machined separately, reducing the manufacturing difficulty and facilitating later disassembly and maintenance. If necessary, the second limiting seat 16 can also be machined independently, separately from the valve body 10, and then assembled later, with a sealing connection achieved through a sealing element.

[0041] In this embodiment, the second limiting seat 16 is integrally formed with the valve body 10 to improve the overall structural integrity and sealing performance.

[0042] Furthermore, the inner wall of the valve cavity 14 is provided with a first limiting member 30, which is fixed to the side of the first limiting seat 15 near the first inlet 11 and abuts against the first limiting seat 15. In this way, the first limiting member 30 can limit the movement of the limiting seat away from the valve core 20, ensuring the stability of the limiting seat's position. In another embodiment, the inner wall of the valve cavity 14 is provided with a second limiting member, which is fixed to the side of the second limiting seat 16 near the second inlet 12 and abuts against the second limiting seat 16, ensuring the stability of the second limiting seat 16's position.

[0043] In this embodiment, the first limiting member 30 is configured as a snap ring structure, and an installation groove is opened in the inner wall of the valve cavity 14. The snap ring structure is installed in the installation groove to limit the first limiting member 30.

[0044] The valve core 20 also has at least one inner hole 21 and at least one outer groove 22. The inner hole 21 extends along the axis of the valve core 20, and the outer groove 22 is formed on the outer periphery of the valve core 20. In this way, the wall thickness of the valve core 20 can be appropriate, ensuring the processability of injection molding.

[0045] Preferably, in this embodiment, there are two inner holes 21, which extend towards each other from both ends of the valve core 20 but do not penetrate each other. There are four outer grooves 22, which are arranged at intervals along the outer periphery of the valve core 20.

[0046] The valve core 20 has a first groove 23 and a second groove 24 at its two ends, respectively. A first sealing element 231 and a second sealing element 241 are respectively embedded in the first groove 23 and the second groove 24. As the valve core 20 moves, the first sealing element 231 abuts against the first valve port 153, and the second sealing element 241 abuts against the second valve port 161. This ensures a tighter fit between the valve core 20 and the first and second valve ports 153 and 161. The first and second sealing elements 231 and 241 prevent gaps from forming between the valve core 20 and the first and second limiting elements 30 through their own deformation.

[0047] Preferably, in this embodiment, the first seal 231, the second seal 241 and the third seal 152 are all configured as sealing ring structures and are made of rubber.

[0048] Furthermore, the outer periphery of the valve core 20 is provided with multiple spaced guide ribs 25. The guide ribs 25 protrude from the outer periphery of the valve core 20 and are in a movable fit with the inner wall of the valve cavity 14. In this way, the guide ribs 25 can guide the guiding direction of the valve core 20. Due to the clearance fit with the inner wall of the valve cavity 14, no contact friction occurs during normal movement, reducing frictional force. When the valve core 20 is misaligned, the guide ribs 25 abut against the inner wall of the valve cavity 14, thereby ensuring that the valve core 20 continues to move stably.

[0049] The valve core 20 has a first end near the first inlet 11 and a second end near the second inlet 12. A guide rib 25 extends axially along the valve core 20, and the end of the guide rib 25 near the first end has a third abutting slope 251 that abuts against the first limiting seat 15. The end of the guide rib 25 near the second end has a fourth abutting slope 253 that abuts against the second limiting seat 16. Preferably, the slope of the third abutting slope 251 is consistent with the slope of the first valve port 153, and the slope of the fourth abutting slope 253 is consistent with the slope of the second valve port 161, so that the abutment between the guide rib 25 and the limiting seat is tighter.

[0050] The guide rib 25 has a first protrusion 252 and a second protrusion 254 that are movably fitted with the inner wall of the valve cavity 14. The maximum distance between the first protrusion 252 and the second protrusion 254 is L1, and the inner diameter of the valve cavity 14 is set to D, satisfying L1 > D. Since the valve core 20 abuts against the inner wall of the valve cavity 14 through the first protrusion 252 and the second protrusion 254, the maximum distance L1 between the first protrusion 252 and the second protrusion 254 is the effective guiding length of the valve core 20. L1 > D can ensure the stable guiding effect of the guide rib 25 and avoid interference with the opening structure. The larger L1 / D is, the more stable it is, but the cost and installation space need to be increased. Therefore, it can be flexibly set according to actual needs.

[0051] The shape of the guide rib 25 is optional. It can be set as a rectangle, trapezoid, or semi-circle, as long as it can fit and abut against the inner wall of the valve cavity 14.

[0052] Along the axial direction of the valve body 10, the maximum distance between the side of the first limiting seat 15 near the valve core 20 and the outlet 13 is L2. When the valve core 20 abuts against the first limiting seat 15, the maximum distance between the side of the first limiting seat 15 near the valve core 20 and the second protrusion 254 is L3, satisfying L3 > L2. That is, when the valve core 20 abuts against the first limiting seat 15, the second protrusion 254 abuts against the inner wall of the valve cavity 14 and is located on the side of the outlet 13 away from the first limiting seat 15. Conversely, when the valve core 20 abuts against the second limiting seat 16, the first protrusion 252 abuts against the inner wall of the valve cavity 14 and is located on the side of the outlet 13 away from the second limiting seat 16. Thus, even if the valve core 20 moves to its extreme positions at both ends, the first protrusion 252 and the second protrusion 254 will not deviate into the outlet 13 and interfere with the edge of the outlet 13. Therefore, it prevents the valve core 20 from jamming due to the movement of the through hole. In other words, when the valve core 20 abuts against the first limiting seat 15, the second protrusion 254 is misaligned with the outlet 13, and when the valve core 20 abuts against the second limiting seat 16, the first protrusion 252 is misaligned with the outlet 13.

[0053] Similarly, please see Figure 6 The maximum distance between the side of the second limiting seat 16 near the valve core 20 and the outlet 13 is L4. When the valve core 20 abuts against the second limiting seat 16, the maximum distance between the side of the second limiting seat 16 near the valve core and the first protrusion 252 is L5, satisfying L5 > L4. Thus, as explained above, when the valve core 20 moves to the limit position, the first protrusion 252 will not deviate into the outlet 13 and interfere with the edge of the outlet 13, that is, the first protrusion 252 and the outlet 13 are misaligned.

[0054] It should be explained that, in this embodiment, outlet 13 includes an expanding section 131 and a narrowing section 132, which are connected. The expanding section 131 can increase the flow capacity of the valve device 100. However, in the above description, the maximum distance between the first limiting seat 15 and outlet 13 refers to the maximum distance between the first limiting seat 15 and narrowing section 132, and the maximum distance between the second limiting seat 16 and outlet 13 also refers to the maximum distance between the second limiting seat 16 and narrowing section 132.

[0055] Please see Figure 4 This utility model also provides a refrigeration system, including the valve device 100 as described above. The refrigeration system further includes a first condenser 201 and a second condenser 202, both of which are connected to the valve device 100 and are arranged in parallel. Thus, the valve device 100 can control the connection of either the first condenser 201 or the second condenser 202 to the refrigeration system. The refrigeration system also includes a compressor 300, with both the first condenser 201 and the second condenser 202 connected to the compressor 300 and their on / off states controlled by the valve device 100.

[0056] Please continue reading Figure 4 In one embodiment, the refrigeration system further includes a solenoid three-way valve 301. The two parallel-connected first condensers 201 and second condensers 202 are both connected to the solenoid three-way valve 301. The solenoid three-way valve 301 is connected in series with the compressor 300 and can control the connection between the first condenser 201 or the second condenser 202 and the compressor 300.

[0057] Please see Figure 5 In another embodiment, the refrigeration system further includes two solenoid valves 302. The two flow paths installed on the first condenser 201 and the second condenser 202 are the first branch and the second branch, respectively. The two solenoid valves 302 are installed in the first branch and the second branch, respectively, and the two solenoid valves 302 can control the opening and closing of the first branch and the second branch, respectively.

[0058] Compared to existing technologies, this utility model uses a valve device 100 in conjunction with two condensers to replace the traditional scheme of setting two one-way valves separately. The valve cavity 14 is provided with a first limiting seat 15 and a second limiting seat 16. The first limiting seat 15 and the second limiting seat 16 are respectively provided with a first valve port 153 and a second valve port 161 for abutting against the valve core 20. The first valve port 153 and the second valve port 161 are inclined, so the abutment between the valve core 20 and the inclined surface is tighter and the contact area is smaller, so the pressure per unit area is greater, which improves the sealing performance of the abutment between the valve core 20 and the first limiting seat 15 and the second limiting seat 16 and prevents the medium from leaking.

[0059] 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.

[0060] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A valve device, characterized in that, include: The valve body (10) is constructed with a valve cavity (14) and a first inlet (11), a second inlet (12) and an outlet (13) that are all connected to the valve cavity (14). A valve core (20) is installed in the valve cavity (14) and is movable along the valve cavity (14); The inner wall of the valve cavity (14) is provided with a first limiting seat (15) and a second limiting seat (16). The first limiting seat (15) and the second limiting seat (16) are located at both ends of the valve core (20). The first limiting seat (15) has a first valve port (153) on the side facing the valve core (20), and the second limiting seat (16) has a second valve port (161) on the side facing the valve core (20). As the valve core (20) moves, the valve core (20) can abut against the first valve port (153) to block the first inlet (11), or abut against the second valve port (161) to block the second inlet (12).

2. The valve device according to claim 1, characterized in that, The axis of the first inlet (11), the axis of the second inlet (12) and the axis of the valve cavity (14) are located on the same straight line, and the axis of the outlet (13) is set at an angle to the axis of the valve cavity (14).

3. The valve device according to claim 1, characterized in that, The first limiting seat (15) protrudes from the inner wall of the valve cavity (14); and / or, the second limiting seat (16) protrudes from the inner wall of the valve cavity (14).

4. The valve device according to claim 1, characterized in that, The first valve port (153) has a conical cross-section along the axis of the valve cavity (14); the opening area of ​​the first valve port (153) facing the valve cavity (14) is larger than its opening area facing the first inlet (11). And / or, the second valve port (161) has a conical cross-section along the axis of the valve cavity (14); the opening area of ​​the second valve port (161) facing the valve cavity (14) is greater than its opening area facing the second inlet (12).

5. The valve device according to claim 1, characterized in that, The first limiting seat (15) has a first sealing groove (151) on its outer periphery, and a third sealing element (152) is provided in the first sealing groove (151), the third sealing element (152) abutting against the inner wall of the valve cavity (14); and / or, the second limiting seat (16) has a second sealing groove on its outer periphery, and a fourth sealing element is provided in the second sealing groove, the fourth sealing element abutting against the inner wall of the valve cavity (14).

6. The valve device according to claim 5, characterized in that, The inner wall of the valve cavity (14) is provided with a first limiting member (30), which is fixed to the side of the first limiting seat (15) near the first inlet (11) and abuts against the first limiting seat (15); and / or, the inner wall of the valve cavity (14) is provided with a second limiting member, which is fixed to the side of the second limiting seat (16) near the second inlet (12) and abuts against the second limiting seat (16).

7. The valve device according to claim 1, characterized in that, The valve core (20) is also provided with at least one inner hole (21) and at least one outer groove (22). The inner hole (21) extends along the axis of the valve core (20), and the outer groove (22) is provided on the outer periphery of the valve core (20).

8. The valve device according to claim 1, characterized in that, The valve core (20) has a first groove (23) and a second groove (24) at its two ends respectively. The first groove (23) and the second groove (24) are respectively fitted with a first sealing element (231) and a second sealing element (241). As the valve core (20) moves, the first sealing element (231) abuts against the first valve port (153) and the second sealing element (241) abuts against the second valve port (161).

9. The valve device according to claim 1, characterized in that, The valve core (20) has multiple spaced guide ribs (25) on its outer periphery. The guide ribs (25) protrude from the outer periphery of the valve core (20) and move in cooperation with the inner wall of the valve cavity (14).

10. The valve device according to claim 9, characterized in that, The valve core (20) has a first end near the first inlet (11) and a second end near the second inlet (12). The guide rib (25) extends along the axial direction of the valve core (20). The end of the guide rib (25) near the first end is provided with a third abutting slope (251), which abuts against the first limiting seat (15). The end of the guide rib (25) near the second end is provided with a fourth abutting slope (253), which abuts against the second limiting seat (16).

11. The valve device according to claim 9, characterized in that, The guide rib (25) has a first protrusion (252) and a second protrusion (254) that are movably fitted with the inner wall of the valve cavity (14). The maximum distance between the first protrusion (252) and the second protrusion (254) is L1. The inner diameter of the valve cavity (14) is set to D, satisfying: L1 > D.

12. The valve device according to claim 11, characterized in that, Along the axial direction of the valve body (10), the maximum distance between the side of the first limiting seat (15) near the valve core (20) and the outlet (13) is L2. When the valve core (20) abuts against the first limiting seat (15), the maximum distance between the side of the first limiting seat (15) near the valve core (20) and the second protrusion (254) is L3, satisfying: L3 > L2; and / or, Along the axial direction of the valve body (10), the maximum distance between the side of the second limiting seat (16) near the valve core (20) and the outlet (13) is L4. When the valve core (20) abuts against the second limiting seat (16), the maximum distance between the side of the second limiting seat (16) near the valve core (20) and the first protrusion (252) is L5, satisfying: L5 > L4.

13. A refrigeration system, characterized in that, The refrigeration system includes the valve device as described in any one of claims 1-12, and further includes a first condenser (201) and a second condenser (202), both of which are connected to the valve device and are arranged in parallel.

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