Electric switching valve

Abstract

The utility model discloses an electric switching valve, which relates to the technical field of environment detection and comprises a base box. The motor is arranged at the top of the base box; the valve seat is arranged at the top of the base box; the sensor box seat is arranged on the side face of the valve seat and corresponds to the motor in position, a direct-current motor is used, the control method is mature and reliable, the service life is longer, compared with a stepping motor, an additional driving module is not needed, integration of the electric switching valve is facilitated, a plurality of touch sensors are used as limiting devices, and the cost is reduced. And the touch sensor and the rotary touch body are arranged in the sensor box and are not in contact with other devices, so that the interference of the outside to the sensor can be effectively reduced, and the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental detection, and more specifically, to an electric switching valve. Background Art

[0002] In the environmental testing industry, it is necessary to conduct simultaneous sampling and testing of ambient air in the same area, at multiple points, and at the same time in many cases, such as regional pollution source investigation, regional air quality testing, environmental science research, etc. At present, this type of testing in the industry requires the use of a chromatograph, which is a device for chromatographic separation and analysis. Before the test, the inspector needs to use a sampling device to sample the air in the same area, the same time period, and at different points. The air samples taken will be passed into the chromatograph through a switching valve, but the conventional switching valve needs to rely on stepper motor control to work when in use. The control of stepper motors has a high programming control threshold for environmental inspectors. Inspectors often do not know how to install and control the electric valves controlled by stepper motors. In addition, the control of stepper motors is currently inseparable from stepper motor drivers, which also makes it impossible for the electric control valves controlled by stepper motors to be integrated, which brings a lot of inconvenience to users.

[0003] Based on the above problems, we provide an electric switching valve.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the utility model, therefore, it may include prior art that is not known to ordinary technicians in the field. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides an electric switching valve.

[0006] The utility model provides an electric switching valve adopting the following technical solution:

[0007] An electric switching valve comprises a base box; a motor, which is arranged on the top of the base box; a valve seat, which is arranged on the top of the base box; a sensor box seat, which is arranged on the side of the valve seat, and the sensor box seat corresponds to the position of the motor; the motor shaft of the motor is plug-inly assembled with a motor sleeve, and the side end of the motor sleeve is provided with a sleeve bayonet groove, and a cross coupling is assembled in the sleeve bayonet groove through a motor bayonet, and a transmission shaft is fixedly connected to the side end of the cross coupling, and the transmission shaft is arranged in the sensor box seat, and the side end of the transmission shaft is also fixedly connected to a cross transmission pin.

[0008] Preferably, the valve seat includes four grooves on the side of the valve seat for connecting to the sensor box seat; a medium outlet is provided on the front of the valve seat; a guide port is provided on the back of the valve seat, a valve core is installed in the guide port, an "L"-shaped channel medium outlet is provided on one side of the valve core, and the "L"-shaped channel medium outlet is connected to the medium outlet; an "L"-shaped channel medium inlet is provided on the outer side of the valve core, and a first medium inlet, a second medium inlet, a third medium inlet and a fourth medium inlet are provided on the inner wall of the guide port; the first medium inlet, the second medium inlet, the third medium inlet, the fourth medium inlet and the side ports of the medium outlet are fixedly equipped with metal joints.

[0009] Preferably, a straight-line transmission groove is provided on the other side of the valve core, a straight-line transmission pin is fixedly connected to the side end of the transmission shaft, and the straight-line transmission groove fits tightly with the straight-line transmission pin of the transmission shaft to realize the transmission of torque and rotational motion.

[0010] Preferably, the side of the sensor box seat is detachably equipped with a sensor box cover, and the side of the sensor box cover is provided with a cross slot for passing the transmission shaft, and the side of the sensor box seat is fixedly connected with four bosses with plug-in grooves for assembling the sensor box seat on the side of the valve seat; the side of the sensor box seat is provided with a straight slot for passing a straight transmission pin; the inside of the sensor box seat is fixedly installed with a first touch sensor, a second touch sensor, a third touch sensor and a fourth touch sensor, a first touch sensor limiting boss is installed on the side end of the first touch sensor, a second touch sensor limiting boss is installed on the side end of the second touch sensor, and a third touch sensor is installed on the side end of the third touch sensor The fourth touch sensor limiting boss is installed on the side end of the fourth touch sensor, and the first touch sensor limiting boss, the second touch sensor limiting boss, the third touch sensor limiting boss and the fourth touch sensor limiting boss correspond to the positions of the first medium inlet, the second medium inlet, the third medium inlet and the fourth medium inlet; a rotating touch body is also provided inside the sensor box seat, and the rotating touch body is assembled with the cross transmission pin of the transmission shaft through a cross transmission groove, and a rotating touch body limiting block is fixedly connected to the outer side surface of the rotating touch body for contacting the first touch sensor limiting boss, the second touch sensor limiting boss, the third touch sensor limiting boss and the fourth touch sensor limiting boss.

[0011] Preferably, the bottom of the base box is detachably equipped with a base box cover, the top of the base box cover is fixedly equipped with an integrated circuit board, and a grid-shaped heat dissipation structure is provided on the side of the base box cover relative to the position of the integrated circuit board, and the integrated circuit board is electrically connected to the first touch sensor, the second touch sensor, the third touch sensor, and the fourth touch sensor.

[0012] In summary, the utility model includes the following beneficial technical effects:

[0013] 1. Using DC motor, the control method is mature and reliable, and the service life is longer. Compared with the stepper motor, it does not require an additional drive module, which is conducive to the integrated integration of the electric switching valve;

[0014] 2. Use multiple touch sensors as limit devices to control the position of the rotation and ensure that the switch is in place. The touch sensor and the rotating touch body are installed in the sensor box and do not contact other devices, which can effectively reduce external interference with the sensor and extend its service life;

[0015] 3. The valve core and the rotating contact body are provided with corresponding slots, which can be connected with the pin structure on the transmission shaft by mortise and tenon joints. It is simple and compact, highly reliable, can effectively reduce rotation deviation, and is easy to assemble during assembly, reducing installation errors;

[0016] 4. The drive shaft and the motor sleeve are connected by a cross coupling. The slots on the drive shaft and the motor sleeve are 90 degrees relative to each other and the hubs on both sides of the cross coupling are mortised together. During operation, the coupling slides between the two hubs through the center slider to compensate for the deviation and reduce the deviation of the axes on both sides. While transmitting torque and rotational motion, it protects the bearings well.

[0017] 5. The motor sleeve and the motor shaft are connected by a motor bayonet. There is a convex point and groove structure between the motor sleeve and the motor shaft, so that the two can be closely connected, helping to share the pressure exerted by the transmission shaft on the motor shaft. The motor bayonet can fix the position of the two and improve reliability;

[0018] 6. The sensor box and the sensor box cover, as well as the sensor box and the valve seat are fixed with convex columns and grooves, which are simple and compact, improve the stability of the structure, and are easy to assemble during assembly, reducing installation errors;

[0019] 7. Silicone sealing gaskets are used between the medium inlet, outlet and joints to reduce medium leakage and improve sealing performance. The valve body structure has good air tightness and is suitable for gas switching.

[0020] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an electric switching valve in an embodiment of the utility model;

[0022] Figure 2It is a structural schematic diagram of the air inlet-outlet valve body in the embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the other side of the air inlet-outlet valve body in the embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the sensor triggering device in the embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the other side of the sensor trigger device in the embodiment of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the transmission control device in the embodiment of the utility model;

[0027] Figure 7 It is a structural schematic diagram of the base box in the embodiment of the utility model;

[0028] Figure 8 It is an overall schematic diagram of an electric switching valve in an embodiment of the utility model.

[0029] Description of the accompanying drawings: 1. valve seat; 11. groove; 12. valve core; 121. "L"-shaped channel medium inlet; 122. "L"-shaped channel medium outlet; 123. straight transmission groove; 13. silicone sealing gasket; 14. metal joint; 150. medium outlet; 151. first medium inlet; 152. second medium inlet; 153. third medium inlet; 154. fourth medium inlet; 21. sensor box seat; 211. boss; 212. straight notch; 221. first touch sensor; 222. second touch sensor; 223. third touch sensor; 224. fourth touch sensor; 225. first touch sensor limiting boss; 226. second touch sensor limiting boss; 227, third touch sensor limit boss; 228, fourth touch sensor limit boss; 23, rotating touch body; 231, rotating touch body limit block; 232, cross transmission groove; 24, sensor box cover; 241, cross notch; 31, transmission shaft; 311, straight transmission pin; 312, cross transmission pin; 32, cross coupling; 33, motor bayonet; 34, motor shaft sleeve; 342, shaft sleeve bayonet pin groove; 35, motor; 351, motor shaft; 41, base box; 411, motor slot; 412, sensor line channel; 42, motor buckle; 421, hexagon socket joint bolt; 422, cross bolt; 43, integrated circuit board; 44, base box cover; 441, grid-like heat dissipation structure. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 8 The utility model is described in further detail.

[0031] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0032] The utility model discloses an electric switching valve. Figures 1 to 8 , an electric switching valve, including a base box 41; a motor 35, arranged at the top of the base box 41; a valve seat 1, arranged at the top of the base box 41; a sensor box seat 21, arranged at the side of the valve seat 1, and the sensor box seat 21 corresponds to the position of the motor 35; a motor shaft 351 of the motor 35 is plugged and assembled with a motor sleeve 34, a sleeve bayonet groove 342 is opened at the side end of the motor sleeve 34, a cross coupling 32 is assembled in the sleeve bayonet groove 342 through a motor bayonet 33, a transmission shaft 31 is fixedly connected to the side end of the cross coupling 32, and the transmission shaft 31 is arranged in the sensor box seat 21, and a cross transmission pin 312 is also fixedly connected to the side end of the transmission shaft 31.

[0033] Specifically, Figure 2 and Figure 3 The valve seat 1 includes four grooves 11 formed on the side of the valve seat 1 for connecting the sensor box seat 21; a medium outlet 150 is formed on the front of the valve seat 1; a guide port is formed on the back of the valve seat 1, a valve core 12 is assembled in the guide port, an "L"-shaped channel medium outlet 122 is formed on one side of the valve core 12, and the "L"-shaped channel medium outlet 122 is communicated with the medium outlet 150; an "L"-shaped channel medium inlet 121 is formed on the outer side of the valve core 12, and a first medium inlet 151, a second medium inlet 152, a third medium inlet 153 and a fourth medium inlet 154 are formed on the inner wall of the guide port; the first medium inlet 151, the second medium inlet 152, the third medium inlet 153, the fourth medium inlet 154 and the side ports of the medium outlet 150 are fixedly assembled with metal joints 14, and the medium outlet 150 and each medium inlet are equipped with silicone sealing gaskets 13.

[0034] Specifically, Figure 2 and Figure 3 A straight transmission groove 123 is provided on the other side of the valve core 12, and a straight transmission pin 311 is fixedly connected to the side end of the transmission shaft 31, and the straight transmission groove 123 fits tightly with the straight transmission pin 311 of the transmission shaft 31 to realize the transmission of torque and rotational motion.

[0035] Specifically, Figure 4 and Figure 5The side of the sensor box seat 21 is detachably equipped with a sensor box cover 24, and the side of the sensor box cover 24 is provided with a cross slot 241 for passing the transmission shaft 31, and the side of the sensor box seat 21 is fixedly connected with four bosses 211 for inserting the grooves 11, which are used to assemble the sensor box seat 21 on the side of the valve seat 1; the side of the sensor box seat 21 is provided with a straight slot 212 for passing the straight transmission pin 311; the inside of the sensor box seat 21 is fixedly installed with a first touch sensor 221, a second touch sensor 222, a third touch sensor 223 and a fourth touch sensor 224, and the four touch sensors are installed clockwise on the four box walls inside the sensor box seat 21, and the side end of the first touch sensor 221 is installed with a first touch sensor limiting boss 225, the side end of the second touch sensor 222 is installed with a second touch sensor limiting boss 226, and the side end of the third touch sensor 223 is installed with a second touch sensor limiting boss 227. The third touch sensor limiting boss 227 is installed on the end, and the fourth touch sensor limiting boss 228 is installed on the side end of the fourth touch sensor 224, and the first touch sensor limiting boss 225, the second touch sensor limiting boss 226, the third touch sensor limiting boss 227, and the fourth touch sensor limiting boss 228 correspond to the first medium inlet 151, the second medium inlet 152, the third medium inlet 153, and the fourth medium inlet 154; the interior of the sensor box seat 21 is also provided with a rotating touch body 23, and the rotating touch body 23 is plugged and assembled with the cross transmission pin 312 of the transmission shaft 31 through the cross transmission groove 232, and the outer side surface of the rotating touch body 23 is fixedly connected with a rotating touch body limiting block 231, which is used to contact the first touch sensor limiting boss 225, the second touch sensor limiting boss 226, the third touch sensor limiting boss 227, and the fourth touch sensor limiting boss 228;

[0036] When the electric switching valve switches to the first medium inlet 151, the rotating touch body limit block 231 contacts the first touch sensor limit boss 225 of the first touch sensor 221, and the "L"-shaped channel medium inlet 121 of the valve core 12 corresponds to the first medium inlet 151 of the valve seat 1. At this time, the first medium outlet 151 of the valve seat 1 passes through the "L"-shaped channel medium inlet 121 of the valve core 12 to the "L"-shaped channel medium outlet 122, and then connects to the medium outlet 150 of the valve seat 1. When it reaches the second medium inlet 152, the rotating touch body limit block 231 contacts the second touch sensor limit boss 226 of the second touch sensor 222, forming a limit signal, and the motor 35 stops moving. The "L"-shaped channel medium inlet 121 of the valve core 12 corresponds to the second medium inlet 152 of the valve seat 1. At this time, the second medium outlet 152 of the valve seat 1 passes through the "L"-shaped channel medium inlet 121 of the valve core 12 to the "L"-shaped channel medium outlet 122, and then connected to the medium outlet 150 of the valve seat 1.

[0037] Specifically, Figure 7 The bottom of the base box 41 is detachably mounted with a base box cover 44, the top of the base box cover 44 is fixedly mounted with an integrated circuit board 43, and a grid-shaped heat dissipation structure 441 is provided on the side of the base box cover 44 relative to the position of the integrated circuit board 43, and the integrated circuit board 43 is electrically connected to the first touch sensor 221, the second touch sensor 222, the third touch sensor 223, and the fourth touch sensor 224.

[0038] The transmission shaft 31 is connected to the rotating touch body 23 through the cross transmission groove 232 and the cross transmission pin 312, and is connected to the valve seat 1 through the straight transmission groove 123 and the straight transmission pin 311. When the electric switching valve is switched to the first medium inlet 151, the rotating touch body limit block 231 contacts the first touch sensor limit boss 225 of the first touch sensor 221, and the "L"-shaped channel medium inlet 121 of the valve core 12 corresponds to the first medium inlet 151 of the valve seat 1. At this time, the first medium outlet 151 of the valve seat 1 passes through the "L"-shaped channel medium inlet 121 of the valve core 12 to the "L"-shaped channel medium outlet 122, and then connects to the medium outlet 150 of the valve seat 1. When the electric switching valve is switched to the second medium inlet 152, the rotating touch body limit block 231 contacts the second touch sensor limit boss 226 of the second touch sensor 222, forming a limit signal.

[0039] The transmission shaft 31 passes through the cross notch 241 of the sensor box cover 24, and is connected to the rotating touch body 23 through the cross transmission groove 232 and the cross transmission pin 312 for transmission, passes through the straight notch 212 of the rotating touch body 23 and the straight notch 212 of the sensor box seat 21, and is connected to the valve core 12 through the straight transmission groove 123 and the straight transmission pin 311 for transmission. The straight transmission pin 311 and the cross transmission pin 312 can automatically correct the position of the rotating touch body 23 and the valve core 12 through a fitting relationship during assembly, which is convenient for overall installation and debugging;

[0040] The one-way transmission grooves 123 on the transmission shaft 31 and the motor sleeve 34, which are distributed at 90 degrees relative to each other, and the one-way transmission pins 311 on both sides of the cross coupling 32 are mortised together. During operation, the cross coupling 32 compensates for the deviation by sliding the one-way transmission pins 311 between the two one-way transmission grooves 123, reduces the deviation of the axes on both sides, and protects the bearings well while transmitting torque and rotational motion;

[0041] The motor sleeve 34 and the motor shaft 351 are connected by a motor bayonet 33. Figure 4 As shown, there is a convex point and groove structure between the motor sleeve 34 and the motor shaft 351, so that the two can be closely connected, helping to share the pressure applied by the transmission shaft on the motor shaft 351, and the motor bayonet 33 can fix the position of the two to improve reliability;

[0042] The motor 35 is connected to the base box 41 through the motor buckle 42. Figure 5 As shown, the motor buckle 42 is an open ring. After the motor 35 is inserted into the motor buckle 42, the tightness can be adjusted by the hexagon socket joint bolt 421 on the motor buckle 42 to ensure that the motor 35 will not shift or shake during operation. The motor buckle 42 is fixed to the base box 41 by a cross bolt 422;

[0043] The tail end of the motor 35 is in close contact with the motor slot 411 of the base box 41, which helps to share the weight of the entire device and maintain balance. The position of the sensor line channel 412 of the base box 41 corresponds to the sensor line channel 412 of the sensor box seat 21, which is convenient for wiring;

[0044] The integrated circuit board 43 is installed at the grid-shaped heat dissipation structure 441 of the base box cover 44 , and is connected to the first touch sensor 221 , the second touch sensor 222 , the third touch sensor 223 , and the fourth touch sensor 224 through the base box 41 and the sensor line channel 412 of the sensor box seat 21 .

[0045] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0046] In the description of the present utility model, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0050] In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric switching valve, characterized in that: include: Base box (41); A motor (35) is arranged on the top of the base box (41); A valve seat (1) is arranged on the top of the base box (41); A sensor box seat (21) is arranged on a side of the valve seat (1), and the sensor box seat (21) corresponds to the position of the motor (35); The motor shaft (351) of the motor (35) is plugged and assembled with a motor shaft sleeve (34), and a shaft sleeve latch groove (342) is provided at the side end of the motor shaft sleeve (34), and a cross coupling (32) is assembled in the shaft sleeve latch groove (342) through a motor latch (33), and a transmission shaft (31) is fixedly connected to the side end of the cross coupling (32), and the transmission shaft (31) is arranged in the sensor box seat (21), and a cross transmission pin (312) is also fixedly connected to the side end of the transmission shaft (31).

2. The electric switching valve according to claim 1, characterized in that: The valve seat (1) comprises four grooves (11) formed on the side of the valve seat (1) and used for connecting to the sensor box seat (21); The front side of the valve seat (1) is provided with a medium outlet (150); A guide port is provided on the back of the valve seat (1), a valve core (12) is installed in the guide port, an "L"-shaped channel medium outlet (122) is provided on one side of the valve core (12), and the "L"-shaped channel medium outlet (122) is connected to the medium outlet (150); An "L"-shaped channel medium inlet (121) is provided on the outer side surface of the valve core (12), and a first medium inlet (151), a second medium inlet (152), a third medium inlet (153) and a fourth medium inlet (154) are provided on the inner wall of the guide port; The side ports of the first medium inlet (151), the second medium inlet (152), the third medium inlet (153), the fourth medium inlet (154) and the medium outlet (150) are all fixedly equipped with metal joints (14).

3. An electric switching valve according to claim 2, characterized in that: A straight-line transmission groove (123) is provided on the other side of the valve core (12), a straight-line transmission pin (311) is fixedly connected to the side end of the transmission shaft (31), and the straight-line transmission groove (123) and the straight-line transmission pin (311) of the transmission shaft (31) are tightly fitted to achieve the transmission of torque and rotational motion.

4. The electric switching valve according to claim 2, characterized in that: The side of the sensor box seat (21) is detachably mounted with a sensor box cover (24), and the side of the sensor box cover (24) is provided with a cross notch (241) for passing a transmission shaft (31), and the side of the sensor box seat (21) is fixedly connected with four convex columns (211) for inserting into the grooves (11), so as to assemble the sensor box seat (21) on the side of the valve seat (1); A straight groove (212) is provided on the side of the sensor box seat (21) for passing a straight driving pin (311); A first touch sensor (221), a second touch sensor (222), a third touch sensor (223) and a fourth touch sensor (224) are fixedly installed inside the sensor box seat (21); a first touch sensor limiting boss (225) is installed on the side end of the first touch sensor (221); a second touch sensor limiting boss (226) is installed on the side end of the second touch sensor (222); a third touch sensor limiting boss (223) is installed on the side end of the third touch sensor (223); The first touch sensor limiting boss (225), the second touch sensor limiting boss (226), the third touch sensor limiting boss (227), and the fourth touch sensor limiting boss (228) are installed on the side ends of the first touch sensor limiting boss (227), and the fourth touch sensor limiting boss (228), and the first touch sensor limiting boss (225), the second touch sensor limiting boss (226), the third touch sensor limiting boss (227), and the fourth touch sensor limiting boss (228) correspond to the positions of the first medium inlet (151), the second medium inlet (152), the third medium inlet (153), and the fourth medium inlet (154); A rotating touch body (23) is also provided inside the sensor box seat (21), and the rotating touch body (23) is plugged and assembled with the cross transmission pin (312) of the transmission shaft (31) through a cross transmission groove (232), and a rotating touch body limit block (231) is fixedly connected to the outer side surface of the rotating touch body (23), and is used to contact the first touch sensor limit boss (225), the second touch sensor limit boss (226), the third touch sensor limit boss (227), and the fourth touch sensor limit boss (228).

5. The electric switching valve according to claim 4, characterized in that: The bottom of the base box (41) is detachably mounted with a base box cover (44), the top of the base box cover (44) is fixedly mounted with an integrated circuit board (43), and a grid-shaped heat dissipation structure (441) is provided on the side of the base box cover (44) relative to the position of the integrated circuit board (43), and the integrated circuit board (43) is electrically connected to the first touch sensor (221), the second touch sensor (222), the third touch sensor (223), and the fourth touch sensor (224).

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