Electrically powered valve and irrigation system

Abstract

The application discloses an electric valve and an irrigation system. The electric valve comprises a valve body, a controller connected with the valve body and used for controlling opening and closing of the valve body, a water pressure detection device comprising a gas pressure gauge and a gas guide piece, a first end of the gas guide piece being connected with the gas pressure gauge, a second end of the gas guide piece being used for being connected with a liquid path to-be-detected port of the valve body, the gas guide piece being internally provided with a gas guide channel used for connecting the liquid path to-be-detected port and the gas pressure gauge, and a gas-permeable water-blocking structure being arranged in the gas guide channel and / or arranged between the gas guide piece and the gas pressure gauge. According to the electric valve provided in the embodiment of the application, the condensed water in the gas guide piece can be prevented from damaging the gas pressure gauge.

Description

Technical Field

[0001] This application relates to the field of valves, and more particularly to an electric valve and irrigation system. Background Technology

[0002] In related technologies, the electric valve can be an irrigation valve. The electric valve includes a barometer and a gas guide, which connects the barometer and the liquid flow port of the electric valve. The barometer can be used to obtain the liquid pressure at the liquid flow port. In the above solution, water vapor will be generated inside the gas guide when the ambient temperature is high. After the electric valve has been used for a long time, a large amount of water vapor will accumulate inside the gas guide and reach the barometer. When the ambient temperature decreases, the water vapor accumulated inside the gas guide will condense. When there is too much condensate inside the gas guide, it will break through the glass structure of the barometer, damaging the barometer and causing it to malfunction. Utility Model Content

[0003] This application provides an electric valve and irrigation system that can prevent condensate in the air guide from damaging the barometer.

[0004] In a first aspect, embodiments of this application provide an electric valve, the electric valve comprising: a valve body; a controller connected to the valve body for controlling the opening and closing of the valve body; a water pressure detection device including a barometer and an air guide, a first end of the air guide being connected to the barometer, a second end of the air guide being connected to the liquid path test port of the valve body, and an air guide channel inside the air guide for connecting the liquid path test port and the barometer; and a permeable and water-blocking structure disposed in the air guide channel and / or between the air guide and the barometer.

[0005] According to the aforementioned embodiments of the first aspect of this application, the air-permeable and water-blocking structure is disposed in the air-guiding channel, and the distance from the air-permeable and water-blocking structure to the first end is less than half of the total length of the air-guiding component.

[0006] According to any of the foregoing embodiments of the first aspect of this application, the breathable and water-resistant structure includes a breathable and water-resistant membrane.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the air-permeable and water-blocking structure is disposed at the first end of the air guide member.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the water pressure detection device further includes: a first connector for connecting the first end of the air guide to the barometer, wherein the air-permeable and water-blocking structure is disposed at the first connector.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the air-permeable and water-blocking structure includes an air-permeable and water-blocking column, the outer peripheral surface of which is in contact with the inner wall of the air guide.

[0010] According to any of the foregoing embodiments of the first aspect of this application, at least one of the air guide and the air-permeable water-blocking column is deformable, and when the air guide and the air-permeable water-blocking column are not subjected to external force, the diameter of the air-permeable water-blocking column is larger than the inner diameter of the air guide.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the air guide includes a first air guide section, a second air guide section and a barrier section disposed between the first air guide section and the second air guide section, wherein the inner diameter of the barrier section is larger than the inner diameter of the first air guide section and the second air guide section, and the air-permeable and water-blocking structure is disposed in the barrier section.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the air-permeable and water-blocking structure includes an air-permeable and water-blocking filler, which fills the blocking section of the air-guiding channel.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the air-permeable and water-blocking structure includes a water vapor guide tube, the water vapor guide tube includes an opening, the opening is disposed toward the second end, the inner diameter of the opening is larger than the inner diameter of the first air guide section and the second air guide section, and a gas channel is formed between the outer wall of the water vapor guide tube and the inner wall of the blocking section.

[0014] Secondly, embodiments of this application provide an irrigation system comprising: an irrigation pipeline; and an electric valve according to any of the foregoing embodiments of the first aspect of this application, wherein the electric valve is disposed in the irrigation pipeline.

[0015] An electric valve according to an embodiment of this application includes a water pressure detection device, which comprises a barometer and an air guide. A first end of the air guide is connected to the barometer, and a second end is connected to the liquid path port to be tested in the valve body. The air guide has an internal air passage for connecting the liquid path port to be tested and the barometer. The electric valve also includes a permeable and water-blocking structure, which is disposed in the air passage and / or between the air guide and the barometer. When condensate accumulates in the air guide, the permeable and water-blocking structure can prevent the condensate from flowing into the barometer, thereby preventing the condensate in the air guide from damaging the barometer and improving the service life of the electric valve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the first embodiment of the electric valve of this application; Figure 2 This is an exploded perspective view of a portion of the structure of the electric valve in the first embodiment of this application; Figure 3 This is an exploded cross-sectional view of the first embodiment of the electric valve of this application; Figure 4 for Figure 3 A magnified view of a portion of region A in the middle; Figure 5 These are exploded perspective views of the second embodiment of the electric valve of this application; Figure 6 for Figure 5 A magnified view of a portion of region B in the middle; Figure 7 These are schematic cross-sectional views of the air guide component in the third embodiment of the electric valve of this application; Figure 8 These are schematic cross-sectional views of the air guide element in the fourth embodiment of the electric valve of this application.

[0018] Explanation of reference numerals in the attached figures: Valve body - 200; Inlet pipe - 210; Outlet pipe - 220; Valve body body - 230; Controller-400; Water pressure testing device-100; barometer-110; air guide component-120; first end-120a; second end-120b; air guide channel-121; first air guide section-123; second air guide section-124; barrier section-125; first connector-140; second connector-150; Breathable and water-blocking structure-300; Breathable and water-blocking column-300a; Breathable and water-blocking membrane-300b; Breathable and water-blocking filler-300c; Water vapor guide tube-310; Stop part-311; Opening-312; Gas channel-T1.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of this application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0023] This application provides an electric valve. Figure 1 , Figure 2 , Figure 3 These are, respectively, a perspective view, an exploded perspective view, and an exploded cross-sectional view of the first embodiment of the electric valve of this application. Figure 4 for Figure 3 A partially enlarged schematic diagram of area A in the middle. The electric valve includes a valve body 200, a controller 400, a water pressure detection device 100, and a breathable and water-blocking structure 300.

[0024] The controller 400 is connected to the valve body 200 and is used to control the opening and closing of the valve body 200. The controller 400 is capable of communicating with other devices. In some embodiments, the controller 400 includes a circuit board on which the barometer 110 is mounted.

[0025] The water pressure testing device 100 includes a barometer 110 and an air guide 120. The first end 120a of the air guide 120 is connected to the barometer 110, and the second end 120b of the air guide 120 is used to connect to the liquid circuit test port of the valve body 200. The air guide 120 is provided with an air guide channel 121 inside for connecting the liquid circuit test port and the barometer 110.

[0026] A breathable and water-blocking structure 300 is disposed in the air-guiding channel 121 and / or between the air-guiding component 120 and the barometer 110. The breathable and water-blocking structure 300 is configured to be breathable while blocking water vapor. The breathable and water-blocking structure 300 is configured to block water vapor, which may be to at least partially block water vapor or to at least partially absorb water vapor.

[0027] In some embodiments, the valve body 200 includes a valve body 230, at least one inlet pipe 210, and at least one outlet pipe 220. The liquid path to be tested can be disposed on the inlet pipe 210 and / or the outlet pipe 220. When it is necessary to detect the liquid pressure of the inlet pipe 210, the second end 120b of the air guide 120 is connected to the inlet pipe 210 to be tested. When it is necessary to detect the liquid pressure of the outlet pipe 220, the second end 120b of the air guide 120 is connected to the outlet pipe 220 to be tested.

[0028] The connection method between the second end 120b of the air guide 120 and the inlet pipe 210 or outlet pipe 220 can be varied. In one example, the inlet pipe 210, outlet pipe 220, and valve body 230 are integrally formed, and the second end 120b of the air guide 120 can be connected to the wall of the inlet pipe 210 or the wall of the outlet pipe 220. In other examples, the second end 120b of the air guide 120 may not be connected to the wall of the inlet pipe 210 or the outlet pipe 220, but may be connected to other positions on the inlet pipe 210 or the outlet pipe 220. In one example, the inlet pipe 210, outlet pipe 220, and valve body 230 are separately formed but interconnected, and the second end 120b of the air guide 120 can be connected to the wall of the inlet pipe 210 or the outlet pipe 220, or connected to other positions on the inlet pipe 210 or the outlet pipe 220. In one example, the valve body 200 also includes a liquid connection connector connected to the inlet pipe 210 or the outlet pipe 220. The liquid test port can be set on the liquid connection connector, and the second end 120b of the air guide 120 can be connected to the liquid connection connector at the inlet pipe 210 or the outlet pipe 220.

[0029] When the liquid in the electric valve passes through the liquid circuit test port, part of the liquid at the test port will enter the air guide 120 through the second end 120b of the air guide 120, and at the same time compress the gas in the air guide 120. Since there will always be pressurized gas between the liquid circuit test port and the barometer 110, the gas pressure in the air guide 120 is equivalent to the liquid pressure. The gas pressure is detected by the barometer 110 to obtain the gas pressure value, thereby obtaining the liquid pressure at the liquid circuit test port.

[0030] According to an embodiment of this application, an electric valve includes a water pressure detection device 100, which includes a barometer 110 and an air guide 120. A first end 120a of the air guide 120 is connected to the barometer 110, and a second end 120b of the air guide 120 is connected to a liquid path testing port of the valve body 200. The air guide 120 has an internal air guide channel 121 for connecting the liquid path testing port and the barometer 110. The electric valve also includes a permeable and water-blocking structure 300, which is disposed in the air guide channel 121 and / or between the air guide 120 and the barometer 110. When condensate accumulates in the air guide 120, the permeable and water-blocking structure 300 can prevent the condensate from flowing into the barometer 110, thereby preventing the condensate in the air guide 120 from damaging the barometer 110 and improving the service life of the barometer 110 and the electric valve.

[0031] like Figure 4 In some embodiments, the air guide 120 is a tubular structure. The air guide can be an integrally designed air guide tube, or it can be formed by connecting segmented air guide tubes. Alternatively, a barrier section can be provided between the segmented air guide tubes.

[0032] In some embodiments, the air-permeable and water-blocking structure 300 is disposed in the air-guiding channel 121. In some embodiments, the distance from the air-permeable and water-blocking structure 300 to the first end 120a is less than half the total length of the air-guiding member 120, so that the air-permeable and water-blocking structure 300 is closer to the barometer 110, and the length between the air-permeable and water-blocking structure 300 and the second end 120b is longer, so that more water vapor can be accommodated between the air-permeable and water-blocking structure 300 and the second end 120b. The moisture of the water vapor is blocked by the air-permeable and water-blocking structure 300, and the overall air-permeable and water-blocking effect of the water pressure detection device 100 is better.

[0033] In some embodiments, the breathable and water-blocking structure 300 includes a breathable and water-blocking column 300a, the outer peripheral surface of which is attached to the inner wall of the air guide 120.

[0034] The material of the breathable and water-blocking column 300a can be a waterproof and breathable material, such as polyethylene (PE) or polytetrafluoroethylene (PTFE). In one example, the breathable and water-blocking column 300a is a PE column.

[0035] In some embodiments, at least one of the air guide 120 and the air-permeable water-blocking column 300a is deformable. When the air guide 120 and the air-permeable water-blocking column 300a are not subjected to external force, the diameter of the air-permeable water-blocking column 300a is larger than the inner diameter of the air guide 120. The diameter of the air-permeable water-blocking column 300a may be slightly larger than the inner diameter of the air guide 120.

[0036] In one example, the air guide 120 is deformable. The air guide 120 can be made of an elastic or flexible material, and can deform under pressure, returning to its original shape after the pressure is removed. Because the air guide 120 is deformable, and the diameter of the air-permeable and water-blocking column 300a is larger than the inner diameter of the air guide 120, the air-permeable and water-blocking column 300a has a more stable position after being inserted into the air guide 120.

[0037] In one example, the air-permeable water-blocking column 300a is deformable. It can undergo a small degree of deformation after being compressed and return to its original shape after the compressive force disappears. Because the air-permeable water-blocking column 300a is deformable, and its diameter is larger than the inner diameter of the air guide 120, it has a more stable position after being inserted into the air guide 120.

[0038] In the above embodiments, the air-permeable and water-blocking structure 300 is disposed in the air-guiding channel 121. In other embodiments, the air-permeable and water-blocking structure 300 is not limited to being disposed in the air-guiding channel 121. In the above embodiments, the air-permeable and water-blocking structure 300 includes an air-permeable and water-blocking column 300a. In other embodiments, the air-permeable and water-blocking structure 300 is not limited to including an air-permeable and water-blocking column 300a, but may also include other structures.

[0039] Figure 5 These are exploded perspective views of the electric valve in the second embodiment of this application, respectively. Figure 6 for Figure 5 A partially enlarged schematic diagram of area B. The electric valve includes a valve body 200, a controller 400, a water pressure detection device 100, and a breathable and water-blocking structure 300. The controller 400 is connected to the valve body 200 and is used to control the opening and closing of the valve body 200. The water pressure detection device 100 includes a barometer 110 and an air guide 120. The first end 120a of the air guide 120 is connected to the barometer 110, and the second end 120b of the air guide 120 is used to connect to the liquid path test port of the valve body 200. The air guide 120 has an internal air guide channel 121 for connecting the liquid path test port and the barometer 110. The breathable and water-blocking structure 300 is disposed in the air guide channel 121 and / or between the air guide 120 and the barometer 110.

[0040] In the second embodiment, the air-permeable and water-blocking structure 300 can be disposed at the first end 120a of the air guide 120.

[0041] like Figure 5 , Figure 6In some embodiments, the water pressure detection device 100 further includes a first connector 140, which connects the first end 120a of the air guide 120 to the barometer 110. In this embodiment, the air-permeable and water-blocking structure 300 is disposed at the first connector 140. Because the air-permeable and water-blocking structure 300 is disposed at the first connector 140, its installation is more convenient.

[0042] like Figure 5 , Figure 6 In some embodiments, the breathable and water-resistant structure 300 includes a breathable and water-resistant membrane 300b. The material of the breathable and water-resistant membrane 300b can be a waterproof and breathable material, such as PE or PTFE. In one example, the breathable and water-resistant membrane 300b is a PTFE membrane. Optionally, the breathable and water-resistant membrane 300b is installed between the first end 120a of the air guide 120 and the first connector 140 via a sealing ring.

[0043] In some embodiments, the water pressure testing device 100 further includes a second connector 150, which connects the second end 120b to the liquid circuit port to be tested.

[0044] In other embodiments, the breathable and water-blocking structure 300 may also include other structures. For example, the breathable and water-blocking structure 300 includes a breathable and water-blocking filler that fills a predetermined position in the air-guiding channel 121. In some embodiments, in the initial state, the breathable and water-blocking filler fills all of the air-guiding channel 121. In some embodiments, in the initial state, the breathable and water-blocking filler fills only a portion of the air-guiding channel 121. In one example, the breathable and water-blocking filler is a gel. In another example, the breathable and water-blocking filler is silicone oil.

[0045] The breathable and water-resistant structure at point 300 can also be other structures. Figure 7These are schematic cross-sectional views of the air guide component in the third embodiment of the electric valve of this application. The cross-section is a longitudinal section passing through the central axis of the air guide component 120. The electric valve includes a valve body 200, a controller 400, a water pressure detection device 100, and an air-permeable and water-blocking structure 300. The controller 400 is connected to the valve body 200 and is used to control the opening and closing of the valve body 200. The water pressure detection device 100 includes a barometer 110 and an air guide component 120. The first end 120a of the air guide component 120 is connected to the barometer 110, and the second end 120b of the air guide component 120 is used to connect to the liquid path testing port of the valve body 200. An air guide channel 121 is provided inside the air guide component 120 to connect the liquid path testing port and the barometer 110. The air-permeable and water-blocking structure 300 is disposed in the air guide channel 121 and / or between the air guide component 120 and the barometer 110. In this embodiment, the air guide 120 includes a first air guide section 123, a second air guide section 124 arranged along the length direction, and a barrier section 125 disposed between the first air guide section 123 and the second air guide section 124. The inner diameter of the barrier section 125 is larger than the inner diameters of the first air guide section 123 and the second air guide section 124. The air-permeable and water-blocking structure 300 is disposed on the barrier section 125. The inner diameter of the barrier section 125 is larger than the inner diameters of the first air guide section 123 and the second air guide section 124, which can form a larger receiving cavity.

[0046] In this embodiment, the air-permeable and water-blocking structure 300 includes an air-permeable and water-blocking filler 300c, which is filled at a predetermined position in the air-guiding channel 121. Specifically, the air-permeable and water-blocking filler 300c is filled in the blocking section 125 of the air-guiding channel 121. The air-permeable and water-blocking filler 300c can be a water-absorbing filler, such as a desiccant, to absorb moisture in water vapor and reduce liquid permeation.

[0047] Figure 8These are schematic cross-sectional views of the air guide component in the fourth embodiment of the electric valve of this application. The cross-section is a longitudinal section passing through the central axis of the air guide component 120. The electric valve includes a valve body 200, a controller 400, a water pressure detection device 100, and a permeable and water-blocking structure 300. The controller 400 is connected to the valve body 200 and is used to control the opening and closing of the valve body 200. The water pressure detection device 100 includes a barometer 110 and an air guide component 120. The first end 120a of the air guide component 120 is connected to the barometer 110, and the second end 120b of the air guide component 120 is used to connect to the liquid path testing port of the valve body 200. The air guide component 120 has an internal air guide channel 121 for connecting the liquid path testing port and the barometer 110. The permeable and water-blocking structure 300 is disposed in the air guide channel 121 and / or between the air guide component 120 and the barometer 110. The air guide 120 includes a first air guide section 123, a second air guide section 124 arranged along the length direction, and a barrier section 125 disposed between the first air guide section 123 and the second air guide section 124. The inner diameter of the barrier section 125 is larger than the inner diameter of the first air guide section 123 and the second air guide section 124. The air-permeable and water-blocking structure 300 is disposed in the barrier section 125.

[0048] In this embodiment, the breathable and water-blocking structure 300 includes a water vapor guide cylinder 310, which includes an opening 312 facing the second end 120b. The inner diameter of the opening 312 is larger than the inner diameters of the first air guide section 123 and the second air guide section 124. A gas channel T1 is formed between the outer wall of the water vapor guide cylinder 310 and the inner wall of the blocking section 125. Figure 8 The dashed arrows indicate the flow direction of gas in the gas guide 120. In this embodiment, the water vapor guide cylinder 310 includes a stop portion 311 and an opening 312 disposed opposite to each other, wherein the stop portion 311 faces the first end 120a and the opening 312 faces the second end 120b.

[0049] When the electric valve is in normal operating condition, the first end 120a of the air guide 120 is located above the second end 120b. When the liquid in the electric valve passes through the liquid path test port, some of the liquid at the test port will enter the air guide 120 through the second end 120b. This liquid will compress the gas in the air guide 120 in the direction from the second end 120b to the first end 120a, causing the water vapor in the air guide 120 to also compress and flow in the same direction. The water vapor guide cylinder 310 can prevent water vapor from flowing directly towards the first end 120a. The water vapor will condense inside the cylinder wall of the water vapor guide cylinder 310, while the gas can flow towards the barometer 110 through the gas channel T1 on the side of the water vapor guide cylinder 310. This will block the water vapor in the water vapor from passing through to a certain extent, preventing the condensate in the air guide 120 from damaging the barometer 110 and improving the service life of the water pressure detection device 100.

[0050] This application also provides an irrigation system, comprising: an irrigation pipeline and an electric valve as described in any of the preceding embodiments, wherein the electric valve is disposed in the irrigation pipeline. The electric valve includes a valve body 200, a controller 400, a water pressure detection device 100, and an air-permeable and water-blocking structure 300. The controller 400 is connected to the valve body 200 and is used to control the opening and closing of the valve body 200. The water pressure detection device 100 includes a barometer 110 and an air guide 120. A first end 120a of the air guide 120 is connected to the barometer 110, and a second end 120b of the air guide 120 is used to connect to the liquid path testing port of the valve body 200. The air guide 120 has an internal air guide channel 121 for connecting the liquid path testing port and the barometer 110. The air-permeable and water-blocking structure 300 is disposed in the air guide channel 121 and / or between the air guide 120 and the barometer 110.

[0051] The irrigation system according to an embodiment of this application includes an electric valve. In the electric valve, a water pressure detection device 100 includes a barometer 110 and an air guide 120. A first end 120a of the air guide 120 is connected to the barometer 110, and a second end 120b of the air guide 120 is used to connect to the liquid path testing port of the valve body 200. The air guide 120 has an internal air guide channel 121 for connecting the liquid path testing port and the barometer 110. The electric valve also includes a permeable and water-blocking structure 300, which is disposed in the air guide channel 121 and / or between the air guide 120 and the barometer 110. When condensate accumulates in the air guide 120, the permeable and water-blocking structure 300 can prevent the condensate from flowing into the barometer 110, thereby preventing the condensate in the air guide 120 from damaging the barometer 110 and improving the service life of the barometer 110 and the electric valve.

[0052] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An electric valve, characterized in that, include: Valve body; A controller, connected to the valve body, is used to control the opening and closing of the valve body; A water pressure testing device includes a barometer and an air guide. The first end of the air guide is connected to the barometer, and the second end of the air guide is used to connect to the liquid circuit test port of the valve body. The air guide has an internal air guide channel for connecting the liquid circuit test port and the barometer. An air-permeable and water-resistant structure is provided in the air-guiding channel and / or between the air-guiding component and the barometer.

2. The electric valve as described in claim 1, characterized in that, The breathable and water-blocking structure is disposed in the air guiding channel, and the distance from the breathable and water-blocking structure to the first end is less than half of the total length of the air guiding component.

3. The electric valve as described in claim 1, characterized in that, The breathable and water-resistant structure includes a breathable and water-resistant membrane.

4. The electric valve as described in any one of claims 1-3, characterized in that, The air-permeable and water-blocking structure is disposed at the first end of the air guide.

5. The electric valve as described in any one of claims 1-3, characterized in that, The water pressure detection device also includes: The first connector connects the first end of the air guide to the barometer. The breathable and water-resistant structure is located at the first joint.

6. The electric valve as described in claim 1 or 2, characterized in that, The breathable and water-blocking structure includes a breathable and water-blocking column, the outer peripheral surface of which is in contact with the inner wall of the air guide.

7. The electric valve as described in claim 6, characterized in that, At least one of the air guide and the air-permeable water-blocking column is deformable. When the air guide and the air-permeable water-blocking column are not subjected to external force, the diameter of the air-permeable water-blocking column is larger than the inner diameter of the air guide.

8. The electric valve as described in claim 1 or 2, characterized in that, The air guide component includes a first air guide section, a second air guide section and a barrier section disposed between the first air guide section and the second air guide section, wherein the inner diameter of the barrier section is larger than the inner diameter of the first air guide section and the second air guide section, and the air-permeable and water-blocking structure is disposed in the barrier section.

9. The electric valve as described in claim 8, characterized in that, The air-permeable and water-blocking structure includes an air-permeable and water-blocking filler, which is filled in the blocking section of the air-guiding channel.

10. The electric valve as described in claim 8, characterized in that, The breathable and water-blocking structure includes a water vapor guide tube, which has an opening facing the second end. The inner diameter of the opening is larger than the inner diameters of the first air guide section and the second air guide section. A gas channel is formed between the outer wall of the water vapor guide tube and the inner wall of the blocking section.

11. An irrigation system, characterized in that, include: Irrigation pipelines; The electric valve as described in any one of claims 1-10, wherein the electric valve is disposed in the irrigation pipeline.

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