Mechanical valve switch

Abstract

This invention provides a mechanical valve switch, including a base and a slide. The base has two ends, a first end and a second end. The first end of the base has a first communicating cavity, and a first conduit and a first common conduit are provided at the first end of the base, connecting the first communicating cavity. The first conduit and the first common conduit can be connected through the first communicating cavity to allow the passage of a cold medium. The second end of the base has a second communicating cavity, and a second conduit and a second common conduit are provided at the second end of the base, connecting the second communicating cavity and the second common conduit. The second conduit and the second common conduit can be connected through the second communicating cavity to allow the passage of a hot medium. The slide is slidably disposed in the base and has two pushing parts, which correspond to the first communicating cavity and the second communicating cavity respectively. The mechanical valve switch provided by this invention can effectively prevent the mixing of cold and hot media and reduce sealing fatigue.

Description

Technical Field

[0001] This utility model belongs to the field of switching valve technology, specifically relating to a mechanical valve switch. Background Technology

[0002] In refrigeration and heating equipment made of solid-state elastic materials (shape memory alloys), the actuator periodically applies stress and unloads stress on the shape memory alloy, causing it to release heat to rise and absorb heat to cool down. Therefore, in order to effectively utilize the heat and cold generated, pipes and fluids are usually installed in the refrigeration and heating equipment so that the fluid (medium) can carry the heat or cold generated by the shape memory alloy to the heat exchanger to provide cooling or heating to the target external environment.

[0003] Since the shape memory alloy (MMA) requires the flow of both cooling and heating media in its cartridge-type refrigeration and heating equipment, each end of the equipment has two ports: an inlet and an outlet. Four ports are located at the first end for the cooling media inlet and outlet, and at the second end for the cooling media outlet and inlet. When the MMA heats up, the cooling media outlet at the first end discharges the heated medium, while the cooling media inlet at the second end introduces the cooling medium. When the MMA cools down, the cooling media outlet at the second end discharges the cooled medium, while the cooling media inlet at the first end introduces the heating medium. This process repeats continuously, with each discharge of the heating and cooling media being intermittent, making continuous and stable output impossible. Therefore, multiple cartridge-type refrigeration and heating devices are installed. Each cartridge-type refrigeration and heating device works in conjunction with a switching pipeline. The switching valve of the switching pipeline connects different interfaces on the cartridge-type refrigeration and heating devices, so that the heating medium and the cooling medium can flow stably and continuously.

[0004] In existing technologies, common switching valves typically have three or four ports. However, both three-port and four-port switching valves employ a sliding valve stem located within the valve body and driven by an externally mounted actuator. The valve stem has a common cavity. In a three-port switching valve, the common cavity can continuously communicate with one port, and after the valve stem slides, it can communicate with the other two ports. Similarly, in a four-port switching valve, the sliding valve stem can simultaneously connect the common cavity to two ports, allowing these two ports to communicate through the common cavity. Therefore, when switching between different media, both media will remain in the common cavity, causing either the refrigerant to enter the heat medium channel or vice versa, resulting in mixed flow of different media, which is unsuitable for spring-loaded refrigeration and heating equipment. Furthermore, the common cavity requires extensive sealing as the valve stem slides, but the constant movement of the seals can lead to fatigue and significantly increase the risk of leakage. Utility Model Content

[0005] This utility model provides a mechanical valve switch, which aims to solve the problem of poor practicality caused by the switching valves used in the operation of multiple spring-loaded refrigeration and heating equipment, which cannot avoid media mixing and cannot guarantee sealing effect during operation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a mechanical valve switch, comprising: A base has a first end and a second end; the first end of the base has a first communicating cavity, and a first conduit and a first common conduit are provided at the first end of the base to communicate with the first communicating cavity; the second end of the base has a second communicating cavity, and a second conduit and a second common conduit are provided at the second end of the base to communicate with the second communicating cavity. A sliding block is slidably disposed in the base and has two pushing parts, the two pushing parts respectively corresponding to the first communicating cavity and the second communicating cavity; As the slide block reciprocates under the drive of the driving element, it slides towards the first connecting cavity through the corresponding pushing part to disconnect the connection between the first pipeline and the first common pipeline; or it slides towards the second connecting cavity through the corresponding pushing part to disconnect the connection between the second pipeline and the second common pipeline. Based on this independently configured first and second connecting cavities, the mixing of cold and hot media is avoided, and the fixed configuration of the first and second connecting cavities reduces the risk of leakage due to fatigue.

[0007] In one possible implementation, the slide includes: The slider is slidably disposed within a sliding cavity in the base; Two valve stems are provided, each valve stem is respectively disposed at both ends of the base, and each valve stem is slidably connected to a through hole in the base; the outer end of each valve stem extends into the corresponding first communicating cavity or the corresponding second communicating cavity to form the push part; the inner end of each valve stem is connected to the slider.

[0008] The slider is configured to move in both forward and reverse directions. During forward movement, the slider pushes one of the valve stems into the first communicating cavity, disconnecting the connection between the first pipeline and the second common pipeline; at this time, the second pipeline and the second common pipeline are connected. During reverse movement, the slider pushes the other valve stem into the second communicating cavity, disconnecting the connection between the second pipeline and the second common pipeline; at this time, the first pipeline and the first common pipeline are connected.

[0009] In one embodiment of the slider implementation, the slider has a connecting part that extends out of the base and is used by a driving element; the base has an elongated slot through which the connecting part passes and slides, so as to facilitate the driving element to drive the slider.

[0010] In one embodiment of the slider implementation, an exemplary example is provided, where the spacing direction from the first end to the second end of the base is defined as a first direction; the slider is slidably connected to the sliding cavity along the first direction.

[0011] In another possible implementation of the slide block, the two ends of the slider are respectively provided with sliding holes, and each sliding hole is used for sliding connection of the inner end of each valve column. The slide block also includes two valve springs, each of which is disposed in the slide hole; each valve spring abuts against the inner end of the corresponding valve post; the valve spring is used to spring the corresponding valve post, so that the valve post has a tendency to continuously move outward from the slide hole.

[0012] In one possible implementation, the base includes: The valve housing has a sliding cavity for sliding connection with the slide block; The first end cap is detachably connected to one end of the valve housing, forming the first end of the base; The second end cap is detachably connected to the other end of the valve housing, forming the second end of the base.

[0013] Based on the detachable connection between the first end cap and the second end cap, it is convenient to maintain or replace the first end cap and the second end cap, and it is also convenient to adjust the first end cap and the second end cap to adapt to the different flow rates of the media.

[0014] As an example / illustrative illustration of one embodiment of the first end cap in the base implementation, the first end cap includes: The first pad has a first through hole through which the corresponding push part passes; The first outer cover has a first open groove; the first pipeline is fixedly connected to the first outer cover and communicates with the bottom surface of the first open groove, and is connected to the corresponding push part; the first common pipeline is fixedly connected to the first outer shell and communicates with the side wall surface of the first open groove; the first outer shell and the first pad form the first communicating cavity after being mated. The first locking element is used to lock the first pad and the first outer cover, after they are engaged, onto the valve body.

[0015] As an example / exemplary illustration of one embodiment of the first end cap in the base implementation, the first end cap further includes: The first sealing cap is disposed between the first pad and the first outer cover, and is fixedly clamped by the mating first outer cover and the first pad; the first sealing cap is used to form a seal between the first through hole and the first open groove, and is connected to the corresponding push part, and can extend to the bottom surface of the first open groove under the push of the push part to block the opening of the first pipeline.

[0016] In one embodiment of the first end cap in the base implementation, the first pad is provided with a first annular groove corresponding to the outer edge of the first sealing cap.

[0017] As an example / illustrative illustration of one embodiment of the second end cap in the base implementation, the second end cap includes: The second pad has a second through hole for the corresponding push portion to pass through; The second outer cover has a second open groove; the second pipeline is fixedly connected to the second outer cover and communicates with the bottom surface of the second open groove, and is opposite to the corresponding push part; the second common pipeline is fixedly connected to the second outer shell and communicates with the side wall surface of the second open groove; the second outer shell and the second pad form the second communicating cavity after being mated. The second locking element is used to lock the engaged second pad and second outer cover onto the valve body.

[0018] As an example / illustrative illustration of one embodiment of the second end cap in the base implementation, the second end cap further includes: The second sealing cap is disposed between the second pad and the second outer cover, and is fixedly clamped by the mating second outer cover and the second pad; the second sealing cap is used to form a seal between the second through hole and the second open groove, and is in contact with the corresponding push part, and can extend to the bottom surface of the second open groove under the push of the push part to block the pipe opening of the second pipeline.

[0019] In one embodiment of the second end cap implementation of the base, the second pad is provided with a second annular groove corresponding to the outer edge of the second sealing cap.

[0020] In one possible implementation, the mechanical valve switch further includes a three-way valve having a first port, a second port, and a third port; the first port is connected to the first common pipeline, and the second port is connected to the second port.

[0021] The mechanical valve switch provided in this implementation, compared with the prior art, has a first connecting cavity and a second connecting cavity at both ends of the base, which can correspond to a cold medium and a hot medium, respectively. After the first pipeline connects to the first common pipeline through the first connecting cavity, only the cold medium can pass through. After the second pipeline connects to the second common pipeline through the second connecting cavity, only the hot medium can pass through. The cold medium channel formed by the first pipeline, the first common pipeline, and the first connecting cavity is not interconnected with the hot medium channel formed by the second pipeline, the second common pipeline, and the second connecting cavity, thus effectively preventing the mixing of different media. Furthermore, a sliding block is provided, which can reciprocate under the drive of the driving element (due to the deformation of the shape memory alloy). Two pushing parts corresponding to the first and second connecting cavities, respectively, can disconnect the connection between the first pipeline and the first common pipeline, or disconnect the connection between the second pipeline and the second common pipeline, resulting in good linkage. In addition, both the first and second connecting cavities are fixed, requiring minimal sealing, and the seals do not need to move with the driving assembly, thus effectively reducing the risk of leakage. Attached Figure Description

[0022] Figure 1 Schematic diagram of the mechanical valve switch provided in the embodiment of this utility model Figure 1 ; Figure 2 Schematic diagram of the mechanical valve switch provided in the embodiment of this utility model Figure 2 ; Figure 3 This is a schematic diagram of the main structure of the mechanical valve switch provided in an embodiment of the present utility model; Figure 4 for Figure 3 A cross-sectional view of the mechanical valve switch provided in the embodiment; Figure 5 Schematic diagram of the mechanical valve switch provided in the embodiment of this utility model Figure 3 (Valve housing partially concealed); Figure 6 Exploded view of the first end cap of the mechanical valve switch provided in this embodiment of the utility model Figure 1 ; Figure 7 for Figure 6 An enlarged structural diagram of point A of the mechanical valve switch provided in the embodiment; Figure 8 Exploded view of the first end cap of the mechanical valve switch provided in this embodiment of the utility model Figure 2 ; Figure 9 for Figure 8 An enlarged structural diagram of point B of the mechanical valve switch provided in the embodiment; Figure 10 Exploded view of the second end cap of the mechanical valve switch provided in this embodiment of the utility model Figure 1 ; Figure 11 for Figure 10 An enlarged structural diagram of the mechanical valve switch at point C provided in the embodiment; Figure 12 Exploded view of the second end cap of the mechanical valve switch provided in this embodiment of the utility model Figure 2 ; Figure 13 for Figure 12 An enlarged structural diagram of the mechanical valve switch at point D provided in the embodiment; Figure 14 A cross-sectional view of another embodiment of the mechanical valve switch provided in this utility model, showing the slide, the first end cover, and the second end cover. Figure 15 A schematic diagram of the connection structure between the mechanical valve switch and the three-way valve provided in this embodiment of the utility model; Figure 16 A cross-sectional view of a mechanical valve capable of instantaneous switching, provided for another embodiment of the present invention; Figure 17 A schematic diagram of the structure of a mechanical valve capable of instantaneous switching, provided for another embodiment of this utility model. Figure 3 (Valve housing partially concealed); Figure 18 for Figure 16 The embodiment provides a schematic diagram of the mechanical valve that enables instantaneous switching (the energy storage drive component is in an exploded state relative to the slide). Figure 19 for Figure 16 A top view of the mechanical valve capable of instantaneous switching provided in the embodiment; Figure 20 This is a schematic diagram of the sliding cover structure of a mechanical valve that enables instantaneous switching, provided in another embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures: 10. Base; 11. Valve housing; 111. Slide cavity; 112. Long strip slide opening; 113. First slot; 114. Second slot; 12. First end cap; 121. First pad; 122. First outer cover; 123. First locking element; 124. First sealing cap; 125. First annular slot; 126. First connecting cavity; 13. Second end cap; 131. Second pad; 132. Second outer cover; 133. Second locking element; 134. Second sealing cap; 135. Second annular slot; 136. Second connecting cavity; 14. Three-way valve; 20. Slide block; 21. Slider; 22. Notch; 23. Valve stem; 24. Valve spring; 25. First inclined plane structure; 30. Snap-fit ​​structure; 31. Rotating paddle; 32. Paddle spring; 33. Sliding paddle; 34. Paddle spring; 40. Power storage drive assembly; 41. Valve housing; 42. Power storage spring; 43. Push plate; 44. Pressure plate; 50. First pipeline; 60. First common pipeline; 70. Second pipeline; 80. Second common pipeline; 90. Connecting parts. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] Please refer to the following: Figure 1 , Figure 4 and Figure 13The mechanical valve switch provided by this utility model will now be described. The mechanical valve switch includes a base 10 and a slide 20. The base 10 has two connecting ends, a first end and a second end. The first end of the base 10 has a first connecting cavity 126 corresponding to a cold medium, and a first conduit 50 and a first common conduit 60 connecting the first connecting cavity 126 are provided at the first end of the base 10. The first conduit 50 and the first common conduit 60 can be connected through the first connecting cavity 126 to allow the cold medium to pass through. The second end of the base 10 has a second connecting cavity 136 corresponding to a hot medium, and a second conduit 70 and a second common conduit 80 connecting the second connecting cavity 136 are provided at the second end of the base 10. The second conduit 70 and the second common conduit 80 can be connected through the second connecting cavity 136 to allow the hot medium to pass through. The slide 20 is slidably disposed in the base 10 and has two pushing parts, the two pushing parts corresponding to the first connecting cavity 126 and the second connecting cavity 136 respectively.

[0026] The slide 20 reciprocates under the drive of the driving element. It slides towards the first connecting cavity 126 through the corresponding push part to disconnect the connection between the first pipeline 50 and the first common pipeline 60; or it slides towards the second connecting cavity 136 through the corresponding push part to disconnect the connection between the second pipeline 70 and the second common pipeline 80.

[0027] In practical applications, during the operation of the spring-loaded refrigeration and heating equipment, the cooling medium pipeline corresponds to the first pipeline 50, the first common pipeline 60, and the first connecting cavity 126; the heating medium pipeline corresponds to the second pipeline 70, the second common pipeline 80, and the second connecting cavity 136. As the drive element carries the slide 20 in a reciprocating motion, when the shape memory alloy is heated, the first pipeline 50 and the first common pipeline 60 are connected through the first connecting cavity 126 to allow the cooling medium to pass through; or when the shape memory alloy is cooled, the second pipeline 70 and the second common pipeline 80 are connected through the second connecting cavity 136 to allow the heating medium to pass through.

[0028] It should be explained that when the first pipe 50 and the first common pipe 60 are connected through the first connecting cavity 126, the connection between the second pipe 70 and the second common pipe 80 is disconnected. When the second pipe 70 and the second common pipe 80 are connected through the second connecting cavity 136, the connection between the first pipe 50 and the first common pipe 60 is disconnected.

[0029] Compared with the prior art, the mechanical valve switch provided in this embodiment has a first connecting cavity 126 and a second connecting cavity 136 at both ends of the base 10, corresponding to the cold medium and the hot medium, respectively. After the first pipeline 50 is connected to the first common pipeline 60 through the first connecting cavity 126, it only allows the cold medium to pass through. After the second pipeline 70 is connected to the second common pipeline 80 through the second connecting cavity 136, it only allows the hot medium to pass through. The cold medium channel formed by the first pipeline 50, the first common pipeline 60 and the first connecting cavity 126 is not interconnected with the hot medium channel formed by the second pipeline 70, the second common pipeline 80 and the second connecting cavity 136, thereby effectively preventing the mixing of different media. Furthermore, a slide 20 is provided, which can reciprocate under the drive of the driving element (as the shape memory alloy deforms). Through two pushing parts corresponding to the first connecting cavity 126 and the second connecting cavity 136 respectively, the connection between the first pipe 50 and the first common pipe 60, or the connection between the second pipe 70 and the second common pipe 80, is disconnected, resulting in good linkage. In addition, both the first connecting cavity 126 and the second connecting cavity 136 are fixed, requiring minimal sealing. Furthermore, the seals do not need to move with the driving assembly, thus effectively reducing the risk of leakage.

[0030] In some embodiments, the slide 20 may be adopted as follows: Figure 1 , Figure 4 and Figure 13 The structure shown. See figure. Figure 1 , Figure 4 and Figure 13 The slide block 20 includes a slider 21 and a valve stem 22. The slider 21 is slidably disposed within the slide cavity 111 in the base 10. Two valve stems 22 are provided, each valve stem 22 being disposed at one end of the base 10, and each valve stem 22 being slidably connected to a through hole in the base 10. The outer end of each valve stem 22 extends into the corresponding first communicating cavity 126 or the corresponding second communicating cavity 136, forming a pushing part. The inner end of each valve stem 22 is connected to the slider 21.

[0031] The base 10 has a sliding cavity 111 for the slider 21 to slide in, and two through holes corresponding to the first connecting cavity 126 and the second connecting cavity 136, respectively. One through hole connects the first connecting cavity 126 and the sliding cavity 111, and the other through hole connects the second connecting cavity 136 and the sliding cavity 111. The slider 21 is slidably disposed in the sliding cavity 111, while the two valve stems 22 are slidably disposed in the two through holes, respectively. During the reciprocating movement of the slider 21, the two valve stems 22 can be moved, thereby causing one valve stem 22 to slide into the first through cavity, disconnecting the connection between the first pipeline 50 and the first common pipeline 60; or causing the other valve stem 22 to slide into the second through cavity, disconnecting the connection between the second pipeline 70 and the second common pipeline 80.

[0032] This method can effectively adapt to the intermittent flow of cold and hot media in cartridge-type refrigeration and heating equipment, thereby ensuring a stable and continuous flow of cold and hot media in the overall unit formed by multiple cartridge-type refrigeration and heating equipment.

[0033] In this embodiment, the connection between the valve stem 22 and the slider 21 can be a contact type, a sliding type, or a fixed type.

[0034] One embodiment of the slider 21 described above is as follows, see [link to relevant documentation]. Figure 1 , Figure 3 and Figure 4 The slider 21 is provided with a connecting part 90 that extends out of the base 10 and is used for driving elements. The base 10 is provided with a long strip slide 112 through which the connecting part 90 passes and slides.

[0035] The connection part 90 ensures connection to the driving element, thereby ensuring the driving of the slider 21. The elongated sliding opening 112 accommodates the sliding of the connection part 90, thereby ensuring the stable sliding of the slider 21.

[0036] One embodiment of the slider 21 and the base 10 described above is as follows, see [link to relevant documentation]. Figure 4 and Figure 13 The first direction is defined as the spacing between the first and second ends of the base 10.

[0037] The slider 21 is slidably connected to the slide cavity 111 along the first direction, ensuring that it corresponds to the first end and the second end of the base 10, respectively. Along the first direction, each end of the slider 21 has a sliding hole, the axis of which is set along the first direction and corresponds one-to-one with the two through holes. The axes of the corresponding through holes and sliding holes are collinear. Each sliding hole allows for slidable connection to the inner end of each valve stem 22.

[0038] The slide block 20 also includes two valve springs 23, each disposed in a sliding hole. Each valve spring 23 abuts against the inner end of the corresponding valve stem 22. The valve spring 23 is used to spring the corresponding valve stem 22, causing the valve stem 22 to have a continuous tendency to move outward from the sliding hole.

[0039] In this embodiment, the valve stem 22 and the slider 21 are slidably connected. A sliding hole is provided in the slider 21 to reduce its weight while ensuring the valve stem 22 can slide smoothly. A valve spring 23 is provided in each sliding hole, and the valve spring 23 continuously springs the corresponding valve stem 22 outward. In actual use, the reciprocating stroke of the slider 21 may be relatively long, exceeding the stroke required for the outer end of the valve stem 22 to form a seal. In this case, the compression of the valve spring 23 can accommodate the difference in stroke, thereby avoiding excessive stress on the pushing part and ensuring stability.

[0040] In this embodiment, the slider 21 can be provided with multiple hollow cavities to reduce weight.

[0041] It should be noted that regarding the cooperation between the valve stem 22 and the valve spring 23, when the slider 21 pushes the first valve stem 22 towards the first connecting cavity 126, the valve spring 23 in the other sliding hole will spring back the second valve stem 22 to move outward relative to the slider 21. During this process, the valve spring 23 can return to its initial state, i.e., it is not subject to pressure or tension. The second valve stem 22 can be rebounded by the elastic element in the second connecting cavity 136, or moved into the sliding cavity 111 under the push of the hot medium. Conversely, when the slider 21 pushes the second valve stem 22 towards the second connecting cavity 136, the valve spring 23 in the other sliding hole will spring back the first valve stem 22 to move outward relative to the slider 21. During this process, the valve spring 23 can return to its initial state, i.e., it is not subject to pressure or tension. The first valve stem 22 can be rebounded by the elastic element in the first connecting cavity 126, or moved into the sliding cavity 111 under the push of the cold medium.

[0042] A modified embodiment of the slider 21 and base 10 described above is as follows, see below. Figure 14 The first direction is defined as the spacing between the first and second ends of the base 10.

[0043] The slider 21 is slidably connected to the slide cavity 111 along the first direction, ensuring that it corresponds to the first end and the second end of the base 10, respectively. Along the first direction, the two ends of the slider 21 are respectively provided with a first inclined surface structure 24 corresponding to each valve pillar 22, and the two first inclined surface structures 24 are symmetrically arranged. The axes of the two through holes are both perpendicular to the first direction.

[0044] Each valve stem 22 has a second inclined surface structure at its inner end, which can be adapted to the corresponding first inclined surface structure 24. After the slider 21 slides, one valve stem 22 can slide into the first communicating cavity 126, or the second valve stem 22 can slide into the second communicating cavity 136.

[0045] In this embodiment, the valve stem 22 and the slider 21 are connected by contact. When the slider 21 reciprocates along the first direction, it can push the corresponding valve stem 22 into the first communicating cavity 126 through the first first inclined surface structure 24; or it can push the corresponding valve stem 22 into the first communicating cavity 126 through the second first inclined surface structure 24.

[0046] It should be noted that the two implementation methods of the valve stem 22 and the slider 21 can be randomly selected according to actual needs, specifically whether it is a sliding connection or a contact connection; of course, it also includes a fixed connection, that is, the inner end of the valve stem 22 is directly fixedly connected to the slider 21.

[0047] Meanwhile, the positions of the first connecting cavity 126 and the second connecting cavity 136 can also be adjusted, for example, they can be staggered; or the central axis of the first connecting cavity 126 can be set along the first direction, and the central axis of the second connecting cavity 136 can be set perpendicular to the first direction. Furthermore, the connection between the slider 21 and the two valve stems 22 can also be randomly adjusted, for example, one valve stem 22 can be slidably connected to the slider 21 (with a valve spring 23), and the other valve stem 22 can be contact-type connected to the slider 21 through an inclined structure. The specific combination or structural relationship can be randomly adjusted according to the actual usage environment without affecting the individual use of the first connecting cavity 126 and the second connecting cavity 136.

[0048] In some embodiments, the base 10 may be as follows: Figures 1 to 4 The structure shown. See also Figures 1 to 4 The base 10 includes a valve housing 4111, a first end cap 12, and a second end cap 13. The valve housing 4111 has a sliding cavity 111 for sliding connection of a slide block 20. The first end cap 12 is detachably connected to one end of the valve housing 4111, forming the first end of the base 10. The second end cap 13 is detachably connected to the other end of the valve housing 4111, forming the second end of the base 10.

[0049] Two push parts are defined as the first push part corresponding to the first connecting cavity 126 and the second push part corresponding to the second connecting cavity 136.

[0050] Both the first end cap 12 and the second end cap 13 are detachably connected to the valve housing 4111, which facilitates the formation of the first communicating cavity 126 in the first end of the base 10 and the second communicating cavity 136 in the second end of the base 10. This ensures that the cold medium and the hot medium are respectively connected, avoiding mixing, and is suitable for cartridge-type refrigeration and heating equipment. Moreover, in this structure, the first end cap 12 and the second end cap 13 are both located outside the base 10, which also ensures convenient replacement and maintenance of the first end cap 12 or the second end cap 13.

[0051] One embodiment of the valve housing 4111 described above is as follows, see below. Figures 1 to 4 The valve housing 4111 has a rectangular parallelepiped shape and may include an upper housing and a lower housing. The upper housing and the lower housing can be detachably connected by bolts. The sliding cavity 111 is formed by the upper housing and the lower housing being fitted together. This structure is easy to manufacture and also allows for convenient connection.

[0052] One embodiment of the first end cap 12 described above is as follows: (See also...) Figures 5 to 8The first end cap 12 includes a first pad 121, a first outer cap 122, and a first locking member 123. The first pad 121 has a first through hole for a corresponding first push part to pass through. The first outer cap 122 has a first open groove. A first pipe 50 is fixedly connected to the first outer cap 122 and communicates with the bottom surface of the first open groove, and is opposite to the corresponding first push part. A first common pipe 60 is fixedly connected to the first outer shell and communicates with the side wall surface of the first open groove. The first outer shell and the first pad 121 are mated to form a first communicating cavity 126. The first locking member 123 is used to lock the mated first pad 121 and the first outer cap 122 onto the valve housing 4111.

[0053] The first conduit 50, the first common conduit 60, and the first connecting cavity 126 combine to form the first channel.

[0054] The first end cap 12 adopts a split structure, namely, it includes a first pad 121 and a first outer cap 122. The first connecting cavity 126 is formed by the first pad 121 and the first outer cap 122 being fitted together, which facilitates the first pushing part to slide into it after passing through the first through hole. The first pipe 50 is connected to the bottom surface of the first open groove, and a first pipe opening corresponding to the first pushing part is formed on the bottom surface of the first open groove. The first pushing part can seal the first pipe opening after sliding in, thereby disconnecting the connection between the first pipe 50 and the first common pipe 60. The first common pipe 60 is connected to the side wall of the first open groove, which can ensure the connection between the first open groove and the first pipe 50, and at the same time avoid positional interference between the outside of the first outer cap 122 and the first pipe 50.

[0055] The first through hole and the corresponding through hole are coaxially arranged to facilitate the sliding connection between the corresponding valve stem 22 and the two.

[0056] The first pad 121 and the first outer cover 122 are simultaneously locked to the base 10 by the first locking member 123. That is, when the locking member is removed, the first end plate and the first outer cover 122 can be directly opened and separated, which facilitates disassembly and assembly, and thus ensures replacement and maintenance during use.

[0057] Preferably, the axis of the first pipe opening is collinear with the axis of the first through hole.

[0058] The first locking element 123 may include multiple locking bolts.

[0059] One embodiment of the first end cap 12 described above is as follows: (See also...) Figures 5 to 8The first end cap 12 also includes a first sealing cap 124, which is disposed between the first pad 121 and the first outer cap 122, and is fixedly clamped by the mating first outer cap 122 and the first pad 121. The first sealing cap 124 is used to form a seal between the first through hole and the first open groove, and is connected to the corresponding push part. It can extend to the bottom surface of the first open groove under the push of the push part to seal the opening of the first pipeline 50.

[0060] The first sealing cap 124 can separate and seal the first connecting cavity 126 from the first through hole, preventing leakage of the refrigerant at the first through hole. Simultaneously, the first sealing cap 124 can be pushed and deformed by the pusher to extend towards the first pipe opening, effectively sealing the first pipe opening and thus disconnecting the connection between the first pipe 50 and the first common pipe 60. The first sealing cap 124 can be circular with a certain taper, and its center can have a circular platform covering the first pipe opening to ensure effective sealing. The first sealing cap 124 is clamped by the first pad 121 and the first outer cover 122, facilitating assembly and disassembly, and the clamping force can be flexibly adjusted by the first locking member 123.

[0061] The first sealing cap 124 can be connected to the first pushing part, either by a fixed connection or a contact connection. In the fixed connection, a limiting cap can be provided on the first pushing part, and the limiting cap can be inserted into a limiting groove provided on the first sealing cap 124. In the contact connection, the first pushing part directly abuts against the first sealing cap 124.

[0062] It should also be noted that the first pushing part pushes the first sealing cap 124, causing the first sealing cap 124 to deform and extend. When the first pushing part is relieved of force, the first sealing cap 124 will recover and then push the first pushing part to move in the opposite direction, thereby detaching from the seal on the first pipe opening.

[0063] In the overall scheme, only one first sealing cap 124 is provided in the first connecting cavity 126. When the driving component moves towards the second end cover 13, the first sealing cap 124 will be in a stress-relieving state. That is, in one reciprocating stroke, the first sealing cap 124 will only be touched once. This method can reduce the number of stresses on the first sealing cap 124, thereby avoiding fatigue and improving service life.

[0064] One embodiment of the first end cap 12 described above is as follows: (See also...) Figure 6 The first pad 121 is provided with a first annular groove 125 corresponding to the outer edge of the first sealing cap 124.

[0065] The first annular groove 125 can ensure that when the first outer cover 122 and the first pad 121 clamp the first sealing cap 124, the edge of the first sealing cap 124 is squeezed and extended into it, thereby ensuring the tightness and fixation of the edge of the first sealing cap 124 and ensuring the sealing effect.

[0066] One embodiment of the second end cap 13 described above is as follows: (See also...) Figures 9 to 12 The second end cap 13 includes a second end cap 13, a second outer cap 132, and a second locking member 133. The second end cap 13 has a second through hole for a corresponding second push portion to pass through. The second outer cap 132 has a second open groove. The second pipe 70 is fixedly connected to the second outer cap 132 and communicates with the bottom surface of the second open groove, and is opposite to the corresponding second push portion. The second common pipe 80 is fixedly connected to the second outer shell and communicates with the side wall surface of the second open groove. After the second outer shell and the second end cap 13 are engaged, a second communicating cavity 136 is formed. The second locking member 133 is used to lock the engaged second end cap 13 and second outer cap 132 onto the valve housing 4111.

[0067] The second pipeline 70, the second common pipeline 80, and the second connecting cavity 136 combine to form the second channel.

[0068] The second end cap 13 adopts a split structure, namely, it includes a second pad 131 and a second outer cap 132. The second connecting cavity 136 is formed by the second pad 131 and the second outer cap 132 being fitted together, which facilitates the second pushing part to slide into it after passing through the second through hole. The second pipe 70 is connected to the bottom surface of the second open groove, and a second pipe opening corresponding to the second pushing part is formed at the bottom surface of the second open groove. The second pushing part can seal the second pipe opening after sliding in, thereby disconnecting the connection between the second pipe 70 and the second common pipe 80. The second common pipe 80 is connected to the side wall of the second open groove, which can ensure the connection between the second open groove and the second pipe 70, and at the same time avoid positional interference between the second outer cap 132 and the second pipe 70.

[0069] The second through hole is coaxially arranged with the corresponding through hole, which facilitates the sliding connection between the corresponding valve stem 22 and the two.

[0070] The second end cover 13 and the second outer cover 132 are simultaneously locked to the base 10 by the second locking member 133. That is, when the locking member is removed, the second end cover and the second outer cover 132 can be directly opened and separated, which facilitates disassembly and assembly, and thus ensures replacement and maintenance during use.

[0071] Preferably, the axis of the second port is collinear with the axis of the second through hole.

[0072] The second locking element 133 may include multiple locking bolts.

[0073] One embodiment of the second end cap 13 described above is as follows: (See also...) Figures 9 to 12 The second end cap 13 also includes a second sealing cap 134, which is disposed between the second end cap 13 and the second outer cap 132, and is fixedly clamped by the mating second outer cap 132 and the second end cap 13. The second sealing cap 134 is used to form a seal between the second through hole and the second open groove, and is connected to the corresponding second push part. It can extend to the bottom surface of the second open groove under the pushing action of the second push part to block the opening of the second pipeline 70.

[0074] The second sealing cap 134 separates and seals the second connecting cavity 136 from the second through hole, preventing leakage of the heat medium at the second through hole. Simultaneously, the second sealing cap 134 can be pushed and deformed by the second pushing part, extending towards the second pipe opening, effectively sealing the second pipe opening and thus disconnecting the connection between the second pipe 70 and the second common pipe 80. The second sealing cap 134 can be circular with a certain taper, and its center can have a circular platform covering the second pipe opening to ensure effective sealing. The second sealing cap 134 is clamped by the second end cap 13 and the second outer cap 132, facilitating assembly and disassembly, and the clamping force can be flexibly adjusted by the second locking member 133.

[0075] The second sealing cap 134 can be connected to the second pushing part, either by a fixed connection or a contact connection. In the fixed connection, a limiting cap can be provided on the second pushing part, and the limiting cap can be inserted into a limiting groove provided on the first sealing cap 124. In the contact connection, the second pushing part directly abuts against the second sealing cap 134.

[0076] It should also be noted that the second pushing part pushes the second sealing cap 134, causing the second sealing cap 134 to deform and extend. When the second pushing part is relieved of force, the second sealing cap 134 will recover, thereby pushing the second pushing part to move in the opposite direction and simultaneously detaching from the seal on the second pipe opening.

[0077] In the overall scheme, only one second sealing cap 134 is provided in the second connecting cavity 136. When the driving component moves towards the second end cover 13, the second sealing cap 134 will be in a stress-relieving state. That is, in one reciprocating stroke, the second sealing cap 134 will only be touched once. This method can reduce the number of stresses on the second sealing cap 134, thereby avoiding fatigue and improving service life.

[0078] One embodiment of the second end cap 13 described above is as follows: (See also...) Figure 10 The second end cap 13 is provided with a second annular groove 135 corresponding to the outer edge of the second sealing cap 134.

[0079] The second annular groove 135 ensures that when the second outer cover 132 and the second end cover 13 clamp the second sealing cap 134, the edge of the second sealing cap 134 is squeezed and extended into it, thereby ensuring the tight fixing of the edge of the second sealing cap 134 and ensuring the sealing effect.

[0080] One embodiment of the aforementioned mechanical valve switch is as follows, see [link to relevant documentation]. Figure 15 The mechanical valve switch also includes a three-way valve 14, which has a first port, a second port and a third port; the first port is connected to the first common pipeline 60, and the second port is connected to the second port.

[0081] In practical applications, it may be necessary to discharge the cold medium in the first common pipe 60 and the hot medium in the second common pipe 80. In this case, the three-way valve 14 can be set so that the cold medium discharged in the first common pipe 60 and the hot medium discharged in the second common pipe 80 can be collected in the external main pipe through the third port.

[0082] Based on the same inventive concept, this application also provides an embodiment of a mechanical valve capable of instantaneous switching formed by the switching of the mechanical valve: Common switching valves, whether three-port or four-port, employ a sliding valve stem located within the valve body and driven by an external actuator. The stem has a common cavity. In a three-port valve, the common cavity is continuously connected to one port; sliding the valve stem allows it to connect to the other two ports. In a four-port valve, sliding the stem allows the common cavity to simultaneously correspond to two ports, connecting them. Therefore, when switching between different media, the common cavity may simultaneously connect to three or four ports, leading to mixed flow of different media, unsuitable for cartridge-type refrigeration and heating equipment. Regarding instantaneous switching, the valve must adapt to switching between two media, but the actuator uses a shape-memory alloy. Therefore, the actuator cannot achieve rapid or instantaneous switching, resulting in the inability to quickly block the incoming or outgoing media.

[0083] Based on this, see Figures 16 to 20The mechanical valve switch provided in this embodiment may include a base 10, a slide 20, a snap-fit ​​structure 30, and a power storage drive assembly 40. The base 10 has two connecting ends, a first end and a second end. The first end of the base 10 has a first channel. The second end of the base 10 has a second channel. The slide 20 is slidably disposed in the base 10, and has a first pushing portion corresponding to the first channel and a second pushing portion corresponding to the second channel. The snap-fit ​​structure 30 has a first snap-fit ​​portion and a second snap-fit ​​portion. The base 10 is provided with a first slot 113 and a second slot 114. When the first snap-fit ​​portion is engaged with the first slot 113, the second snap-fit ​​portion disengages from the second slot 114. When the second snap-fit ​​portion is engaged with the second slot 114, the first snap-fit ​​portion disengages from the first slot 113. The power storage drive assembly 40 is slidably disposed in the base 10 in the same direction as the slide 20, and has a first pressing portion corresponding to the first snap-fit ​​portion and a second pressing portion corresponding to the second snap-fit ​​portion.

[0084] The power-accumulating drive assembly 40 is driven by the drive element and slides towards the second channel. After sliding, it can accumulate power on the slide block 20. At the same time, the first pressing part touches the first locking part until the first locking part is squeezed out of the first locking groove 113. Then, the slide block 20 quickly pops out and the second pushing part slides into the second channel to block the second channel. Alternatively, the power-accumulating drive assembly 40 is driven by the drive element and slides towards the first channel. After sliding, it can accumulate power on the slide block 20. At the same time, the second pressing part touches the second locking part until the second locking part is squeezed out of the second locking groove 114. Then, the slide block 20 quickly pops out and the first pushing part slides into the first channel to block the first channel.

[0085] In the achievable application mode, during the operation of the spring-loaded refrigeration and heating equipment, the pipeline for the refrigerant is connected to the first channel, and the pipeline for the heat medium is connected to the second channel. As the driving element drives the power storage drive assembly 40 to reciprocate, it continuously drives the slide 20 to reciprocate. When the shape memory metal alloy heats up, the first channel is in a connected state, allowing the refrigerant to pass through, while the second channel is in a disconnected state; or when the shape memory metal alloy cools down, the second channel is in a connected state, allowing the heat medium to pass through, while the first channel is in a disconnected state.

[0086] When the first channel needs to change from a disconnected state to a connected state, the force-accumulating drive component 40 and the slide 20 cooperate to first accumulate force on the slide 20. After the first locking part disengages from the first locking slot 113, the slide 20 will quickly move towards the second channel due to the accumulated force, thereby causing the second pushing part to slide into the second channel and quickly disconnect the second channel, while the first channel quickly enters the connected state. Alternatively, when the second channel needs to change from a disconnected state to a connected state, the force-accumulating drive component 40 and the slide 20 cooperate to first accumulate force on the slide 20. After the second locking part disengages from the second locking slot 114, the slide 20 will quickly move towards the first channel due to the accumulated force, thereby causing the first pushing part to slide into the first channel and quickly disconnect the first channel, while the second channel quickly enters the connected tube state.

[0087] It should be explained that the first channel is in a connected state and the second channel is in a disconnected state; or the second channel is in a connected state and the first channel is in a disconnected state.

[0088] The mechanical valve provided in this embodiment, capable of instantaneous switching, has a first channel and a second channel at both ends of the base 10, which can correspond to a refrigerant channel or a hot medium channel, respectively. The first channel and the second channel are not interconnected. The first channel is blocked by sliding into the first channel through the first pushing part on the slide 20, or by sliding into the second channel through the second pushing part on the slide 20, effectively preventing the mixing of different media. Furthermore, the slide 20 is provided with a first locking part and a second locking part, and a power-accumulating drive assembly 40 is provided in the base 10. During the reciprocating sliding of the drive element, the power-accumulating assembly can cooperate with the slide 20 and accumulate power for the slide 20. This allows the slide 20 to quickly move towards the second channel after the first locking part disengages from the first locking groove 113, and disconnects the second channel through the second pushing part; or, after the second locking part disengages from the second locking groove 114, the slide 20 to quickly move towards the first channel, and disconnects the first channel through the first pushing part. This instantaneous switching action can effectively adapt to the deformation of the shape memory alloy and the driving element, preventing the ingress or egress of the medium from being blocked quickly, and further avoiding cross-contamination.

[0089] In this embodiment, a snap-fit ​​structure 30 and a power-accumulating drive assembly 40 can be directly added to the aforementioned base 10 and slide 20. However, the connecting part 90 needs to be transferred to the power-accumulating drive assembly 40. Specifically: The base 10 has a sliding cavity 111 for the slider 21 to slide in, and two through holes corresponding to the first channel and the second channel, respectively. One through hole connects the first channel and the sliding cavity 111, and the other through hole connects the second channel and the sliding cavity 111. The slider 21 is slidably disposed in the sliding cavity 111, while the two valve stems 22 are slidably disposed in the two through holes, respectively. During the reciprocating movement of the slider 21, the two valve stems 22 can be moved, thereby causing one valve stem 22 to slide into the first channel, disconnecting the first channel; or causing the other valve stem 22 to slide into the second channel, disconnecting the second channel.

[0090] Two locking structures 30 are provided, which are spaced apart along the sliding direction of the slider 21 and are both connected to the slider 21. One locking structure 30 extends out of the end of the slider 21 and is the first locking part; the other locking structure 30 extends out of the end of the slider 21 and is the second locking part.

[0091] The two engaging structures 30 can respectively form a first engaging part and a second engaging part. The first engaging part, after the first valve stem 22 (the valve stem 22 where the first push part is located) slides into the first channel, can fix the position of the first valve stem 22 by limiting the slider 21, preventing the first valve stem 22 from failing due to reverse movement caused by refrigerant pressure. The second engaging part, after the second valve stem 22 (the valve stem 22 where the second push part is located) slides into the second channel, can fix the position of the second valve stem 22 by limiting the slider 21, preventing the second valve stem 22 from failing due to reverse movement caused by heat medium pressure. Furthermore, the first engaging part can also limit and fix the position of the slider 21 during the movement of the power-accumulating drive assembly 40 towards the second channel, until the first pressing part pushes the first engaging part out of the first slot 113. During this process, power accumulation is completed, ensuring that the slider 21 instantly slides to the second channel side, ensuring rapid connection of the first channel and disconnection of the second channel. Similarly, the second snap-fit ​​part can also limit and fix the position of the slider 21 during the movement of the power storage drive component 40 towards the first channel until the second pressing part squeezes the second snap-fit ​​part out of the second slot 114. During this process, power storage is completed, which can ensure that the slider 21 slides to the side of the first channel instantly, ensuring the rapid connection of the second channel and the disconnection of the first channel.

[0092] This method can effectively adapt to the intermittent flow of cold and hot media in cartridge-type refrigeration and heating equipment, thereby ensuring a stable and continuous flow of cold and hot media in the overall unit formed by multiple cartridge-type refrigeration and heating equipment.

[0093] Furthermore, for ease of understanding or as a preferred embodiment, it can be assumed that the distance between the two locking structures 30 is less than the distance between the two locking slots in the sliding direction of the slider 21. This ensures that when the first locking part is engaged with the first locking slot 113, the second locking part disengages from the second locking slot 114; or ensures that when the second locking part is engaged with the second locking slot 114, the first locking part disengages from the first locking slot 113.

[0094] One embodiment of the aforementioned snap-fit ​​structure 30 is as follows, see below. Figure 17 and Figure 18 Each locking structure 30 includes a rotating paddle 31 and a paddle spring 32. The rotating paddle 31 is disposed in a groove on the slider 21, and the end of the rotating paddle 31 away from the other locking structure 30 is rotatably connected to the slider 21. The paddle spring 32 is disposed in the groove and connected to the other end of the rotating paddle 31, and is used to spring the rotating paddle 31, so that the other end of the rotating paddle 31 has a tendency to continuously move out of the groove.

[0095] One end of the rotating paddle 31 is rotatably connected to the slider 21, while its free end is positioned towards another snap-fit ​​structure 30. This ensures the fixation of the slider 21 at both ends of the slide cavity 111 and also accommodates the power storage drive structure. In addition, this method has a simple structure and is easy to manufacture.

[0096] One modified embodiment of the above-mentioned snap-fit ​​structure 30 is as follows, see below. Figure 17 Each latching structure 30 includes a sliding block 33 and a latching spring 34. The sliding block 33 is slidably disposed in a groove on the slider 21, and the sliding direction is perpendicular to the sliding direction of the slider 21. Each sliding block 33 has an end that can extend out of the groove, which is either a first latching part or a second latching part. A wedge-shaped structure is provided on the extended end of each sliding block 33 to accommodate a first latching groove 113 or a second latching groove 114. Two latching springs 34 are provided, and the two latching springs 34 are respectively disposed in two grooves to ensure that each sliding block 33 continuously bounces, so that each sliding block 33 has a continuous tendency to move outward.

[0097] In some embodiments, the energy storage drive component 40 described above may adopt the structure shown in Figures 1-2. See also Figures 16 to 20The power storage drive assembly 40 includes a sliding cover and power storage springs 42. The sliding cover and the slider 21 are slidably disposed in the sliding cavity 111. The sliding cover is provided with two push plates 43, which are spaced apart along the sliding direction of the sliding cover. The sliding cover is provided with two pressure plates 44. One pressure plate 44 has a first pressing part that corresponds to the first locking part, and the other pressure plate 44 has a second pressing part that corresponds to the second locking part. There are two power storage springs 42, each power storage spring 42 corresponding to one of the push plates 43. One end of each power storage spring 42 abuts against the push plate 43, and the other end abuts against the slider 21.

[0098] The sliding cover is slidably disposed in the sliding cavity 111 and can be slidably connected to or in slidably contacting the slider 21 to ensure space utilization and sliding stability. The two push plates 43 on the slider 21 correspond to two energy storage springs 42 respectively. During the reciprocating movement, the two energy storage springs 42 are compressed respectively, and the elastic force of the energy storage springs 42 enables the slider 21 to be quickly ejected after the limit is released, ensuring the instantaneous switching between the first channel and the second channel.

[0099] The pressing part on the pressure plate 44 can be an arc-shaped surface adapted to the rotating paddle 31. As the sliding cover slides, the rotating paddle 31 gradually rotates into the groove and disengages from the first slot 113 or the second slot 114.

[0100] One embodiment of the aforementioned sliding cover and base 10 is as follows, see below. Figures 16 to 20 This relates to the placement of the power storage drive assembly 40. The sliding cover has a connecting part 90 that extends out of the base 10 and is used for the drive element. The base 10 has an elongated sliding opening 112 for the connecting part 90 to pass through and slide.

[0101] The connection part 90 ensures connection to the driving element, thereby ensuring the driving of the sliding cover. The elongated sliding opening 112 accommodates the sliding of the connection part 90, thereby ensuring the stable sliding of the sliding cover.

[0102] One embodiment of the slider 21 described above is as follows, see [link to relevant documentation]. Figures 16 to 20 The sliding direction of slider 21, and the two ends of slider 21 are respectively provided with notch grooves 21. The two notch grooves 21 are used to limit the placement of two energy storage springs 42 and to allow two push plates 43 to extend into them respectively.

[0103] The two notches 21 can further reduce the weight of the slider 21, while also ensuring that the storage spring 42 is provided with a limiting space, which facilitates the stability of the whole process.

[0104] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical valve switch, characterized in that, include: A base has a first end and a second end; the first end of the base has a first communicating cavity, and a first conduit and a first common conduit are provided at the first end of the base to communicate with the first communicating cavity; the second end of the base has a second communicating cavity, and a second conduit and a second common conduit are provided at the second end of the base to communicate with the second communicating cavity. A sliding block is slidably disposed in the base and has two pushing parts, the two pushing parts respectively corresponding to the first communicating cavity and the second communicating cavity; As the slide block reciprocates under the drive of the driving element, it slides towards the first connecting cavity through the corresponding pushing part to disconnect the connection between the first pipeline and the first common pipeline; or it slides towards the second connecting cavity through the corresponding pushing part to disconnect the connection between the second pipeline and the second common pipeline.

2. The mechanical valve switch as described in claim 1, characterized in that, The slide includes: The slider is slidably disposed within a sliding cavity in the base; Two valve stems are provided, each valve stem is respectively disposed at both ends of the base, and each valve stem is slidably connected to a through hole in the base; the outer end of each valve stem extends into the corresponding first communicating cavity or the corresponding second communicating cavity to form the push part; the inner end of each valve stem is connected to the slider.

3. The mechanical valve switch as described in claim 2, characterized in that, The slider has a connecting part that extends out of the base and is used for driving elements; the base has a long sliding opening through which the connecting part passes and slides.

4. The mechanical valve switch as described in claim 2, characterized in that, The first direction is defined as the spacing between the first and second ends of the base; the slider is slidably connected to the sliding cavity along the first direction.

5. The mechanical valve switch as described in claim 4, characterized in that, The axis of each of the through holes is arranged along the first direction; Along the first direction, each end of the slider is provided with a sliding hole, and each sliding hole is used for sliding connection of the inner end of each valve column; The slide block also includes two valve springs, each of which is disposed in the slide hole; each valve spring abuts against the inner end of the corresponding valve post; the valve spring is used to spring the corresponding valve post, so that the valve post has a tendency to continuously move outward from the slide hole.

6. The mechanical valve switch as described in any one of claims 1-5, characterized in that, The base includes: The valve housing has a sliding cavity for sliding connection with the slide block; The first end cap is detachably connected to one end of the valve housing, forming the first end of the base; The second end cap is detachably connected to the other end of the valve housing, forming the second end of the base.

7. The mechanical valve switch as described in claim 6, characterized in that, The first end cap includes: The first pad has a first through hole through which the corresponding push part passes; The first outer cover has a first open groove; the first pipeline is fixedly connected to the first outer cover and communicates with the bottom surface of the first open groove, and is opposite to the corresponding push part; the first common pipeline is fixedly connected to the first outer shell and communicates with the side wall surface of the first open groove; the first outer shell and the first pad form the first communicating cavity after being mated. The first locking element is used to lock the first pad and the first outer cover, after they are engaged, onto the valve body.

8. The mechanical valve switch as described in claim 7, characterized in that, The first end cap also includes: The first sealing cap is disposed between the first pad and the first outer cover, and is fixedly clamped by the mating first outer cover and the first pad; the first sealing cap is used to form a seal between the first through hole and the first open groove, and is connected to the corresponding push part, and can extend to the bottom surface of the first open groove under the push of the push part to block the opening of the first pipeline.

9. The mechanical valve switch as described in claim 8, characterized in that, The first pad is provided with a first annular groove corresponding to the outer edge of the first sealing cap.

10. The mechanical valve switch as described in claim 6, characterized in that, The second end cap includes: The second pad has a second through hole for the corresponding push portion to pass through; The second outer cover has a second open groove; the second pipeline is fixedly connected to the second outer cover and communicates with the bottom surface of the second open groove, and is opposite to the corresponding push part; the second common pipeline is fixedly connected to the second outer shell and communicates with the side wall surface of the second open groove; the second outer shell and the second pad form the second communicating cavity after being mated. The second locking element is used to lock the engaged second pad and second outer cover onto the valve body.

11. The mechanical valve switch as described in claim 10, characterized in that, The second end cap also includes: The second sealing cap is disposed between the second pad and the second outer cover, and is fixedly clamped by the mating second outer cover and the second pad; the second sealing cap is used to form a seal between the second through hole and the second open groove, and is connected to the corresponding push part, and can extend to the bottom surface of the second open groove under the push of the push part to block the pipe opening of the second pipeline.

12. The mechanical valve switch as described in claim 11, characterized in that, The second pad is provided with a second annular groove corresponding to the outer edge of the second sealing cap.

13. The mechanical valve switch as described in claim 6, characterized in that, The mechanical valve switch also includes a three-way valve, which has a first port, a second port and a third port; the first port is connected to the first common pipeline and the second port is connected to the second port.

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