A self-ice-breaking solenoid valve with built-in exciter

Abstract

The present application discloses a self-ice-breaking solenoid valve with a built-in exciter, which relates to the technical field of solenoid valves. Ultrasonic waves are generated by an exciter mounted on a central guide column assembly to achieve directional transmission of acoustic energy, generate heat and shear stress at the freezing interface, and have high ice-breaking efficiency and low energy consumption. The solenoid valve includes an electromagnetic suction part and a valve seat connected up and down; a valve outlet and a hollow valve tube are provided in the valve seat, and a valve inlet is provided in the hollow valve tube; a valve-controlled moving part is provided in the electromagnetic suction part, and the valve-controlled moving part includes a central guide column assembly; the central guide column assembly is located above the hollow valve tube; an armature ring is mounted on the upper small end of the central guide column assembly, and an exciter is provided between the armature ring and the lower large end of the central guide column assembly; the exciter can excite ultrasonic waves and achieve directional transmission of acoustic energy, so that ultrasonic waves are transmitted to the lower end surface of the central guide column assembly and generate heat and shear stress; an annular sealing gasket is provided between the valve seat and the central guide column assembly.

Description

Technical Field

[0001] The present application relates to the technical field of solenoid valves, and in particular to a self-ice-breaking solenoid valve with a built-in excitation body. Background Art

[0002] Solenoid valves are valve components that use electric current to control their own opening and closing. They can be used to control various fluids, such as liquids, gases, etc. Since solenoid valves can be used with different circuits to achieve the desired control, they are widely used in modern industrial automation control systems. Although there are many types and forms of existing solenoid valves, their core working principle is to control the displacement of the armature and thus control the flow rate of the fluid by controlling the electromagnetic force generated by the control current. The premise for the normal operation of the solenoid valve is to ensure that its moving parts are not disturbed by the outside world and move smoothly.

[0003] However, the actual working environment of the solenoid valve is often very harsh, and one of the most common working environments is low temperature and severe cold. In this working environment, when the controlled fluid is liquid water or a gas containing a large amount of water vapor, the moving parts of the solenoid valve will often be frozen due to being in a low temperature environment for a long time, causing its own moving parts to be unable to move and unable to work normally. In response to such problems, the prior art generally configures an electric heating module in the solenoid valve system, first turns on the solenoid valve electric heating module before the control system is started, and uses the heat generated by the electric heating module to heat the frozen parts and melt the ice. The disadvantages of this method are: the deicing efficiency is low, and the entire solenoid valve often needs to be heated before the ice melts, the thermal efficiency is low, and it consumes a lot of system electricity. Summary of the invention

[0004] The embodiment of the present application provides a self-ice-breaking solenoid valve with a built-in exciter. By setting an annular sealing gasket in the annular cavity between the valve seat and the central guide column assembly, the liquid in the valve seat cannot enter the installation cavity of the electromagnetic suction part, thereby avoiding the freezing of parts in the installation cavity. At the same time, the exciter mounted on the central guide column assembly generates ultrasonic waves, and the sound energy is transmitted downward in a directional manner through the central guide column assembly. When the ultrasonic wave carrying ultra-strong wave energy is transmitted to the ice interface of the solenoid valve through the central guide column assembly, heat and shear stress are generated at the frozen interface, thereby achieving ice breaking without completely melting the ice, with high ice breaking efficiency and low energy consumption.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a self-ice-breaking solenoid valve with an excitation body built-in, comprising an electromagnetic suction part and a valve seat connected up and down; a valve outlet hole and a hollow valve tube are provided in the valve seat, and a valve inlet hole is provided in the hollow valve tube; an iron core is provided in the electromagnetic suction part, a mounting cavity is provided in the iron core, a valve-controlled moving part is provided in the mounting cavity, and the valve-controlled moving part comprises a central guide column assembly slidably connected in the mounting cavity; the central guide column assembly is located above the hollow valve tube; when the central guide column assembly moves to the lower limit position, the lower end face of the central guide column assembly abuts against the upper end face of the hollow valve tube. When the valve seat and the center guide column assembly are in the state of being connected, the valve inlet hole and the valve outlet hole are disconnected; when the center guide column assembly leaves the lower limit position, the valve inlet hole and the valve outlet hole are connected; the center guide column assembly comprises a lower large end and an upper small end, an armature ring is sleeved on the upper small end of the center guide column assembly, and an excitation body is provided between the armature ring and the lower large end of the center guide column assembly; the excitation body can excite ultrasonic waves and realize directional transmission of sound energy, so that ultrasonic waves are transmitted to the lower end surface of the center guide column assembly, and generate heat and shear stress; an annular sealing gasket is provided between the valve seat and the center guide column assembly; the annular sealing gasket is arranged close to the electromagnetic suction part.

[0006] Furthermore, the excitation body is a piezoelectric ultrasonic excitation unit; it includes an electrode sheet group and a piezoelectric chip group; the electrode sheet group includes a lower electrode sheet, an intermediate electrode sheet and an upper electrode sheet; the piezoelectric chip group includes a lower piezoelectric chip and an upper piezoelectric chip; the lower electrode sheet, the lower piezoelectric chip, the intermediate electrode sheet, the upper piezoelectric chip and the upper electrode sheet are arranged in sequence from bottom to top; the lower electrode sheet and the upper electrode sheet are connected to the first pole of the alternating signal driving power supply; the intermediate electrode sheet is connected to the second pole of the alternating signal driving power supply.

[0007] Furthermore, the polarization direction of the piezoelectric chip group is the axial direction of the piezoelectric chip group.

[0008] Furthermore, the polarization direction of the piezoelectric chip group is the circumferential direction of the piezoelectric chip group.

[0009] Furthermore, the valve-controlled motion part also includes a spring, a pressure ring and a guide sleeve; the installation cavity includes a spring installation cavity and an armature ring installation cavity which are interconnected; the two ends of the spring respectively abut the top surface of the guide pin installation cavity and the upper end surface of the center guide column assembly; the lower end surface of the center guide column assembly abuts the upper end surface of the hollow valve tube; a guide sleeve is provided between the outer cylindrical surface of the lower end of the center guide column assembly and the inner wall surface of the armature ring installation cavity; the diameter of the pressure ring is larger than the aperture of the spring installation cavity, and the pressure ring is sleeved on the center guide column assembly and is located above the armature ring.

[0010] Furthermore, the center guide column assembly includes a center guide column and an independent pressure block connected to the lower part of the center guide column; the lower end surface of the independent pressure block abuts against the upper end surface of the hollow valve tube; the inner end of the annular sealing gasket is pressed between the center guide column and the independent pressure block.

[0011] Furthermore, the electromagnetic suction part includes a bracket connected to the upper surface of the valve seat; a copper winding and a winding skeleton are arranged in the bracket, and a bracket cover plate is arranged at the mouth of the bracket.

[0012] Furthermore, the lower end of the iron core extends out of the winding frame and forms a limiting flange, and the upper end surface of the valve seat is provided with a limiting groove adapted to the limiting flange, and the limiting flange is accommodated in the limiting groove; the outer end of the annular sealing gasket is pressed between the limiting flange and the bottom of the limiting groove.

[0013] Furthermore, the valve inlet hole extends along the axial direction of the valve seat, and the valve outlet hole extends along the radial direction of the valve seat.

[0014] Furthermore, the hollow valve tube and the valve seat are sealed by a sealing member.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] 1. The embodiment of the present application sets a piezoelectric ultrasonic excitation unit on the central guide column, uses the piezoelectric chip under the action of the electric field to excite the ultrasonic wave and realizes the directional transmission of the acoustic energy under the specific system vibration mode. When the ultrasonic wave carrying the ultra-strong wave energy is transmitted to the ice interface of the solenoid valve (the plane where the upper surface of the hollow valve tube is located), heat and shear stress are generated at the frozen interface, thereby achieving ice breaking without completely melting the ice. Compared with the traditional electric heating ice-melting de-icing solenoid valve, the solenoid valve system of the embodiment of the present application has high ice-breaking efficiency and low energy consumption. At the same time, by setting an annular sealing gasket in the annular cavity between the valve seat and the central guide column assembly, the liquid in the valve seat cannot enter the installation cavity of the electromagnetic suction part, thereby avoiding the freezing of the parts in the installation cavity, that is, protecting the parts in the installation cavity and reducing the difficulty of ice breaking.

[0017] 2. The polarization direction of the piezoelectric chip in the excitation body in the embodiment of the present application can be axial or circumferential. When the polarization direction of the piezoelectric chip is axial, longitudinal expansion and contraction vibration can be generated at the valve mouth of the vibration transmission body; when the polarization direction of the piezoelectric chip in the excitation body is circumferential, circumferential torsional vibration can be generated at the valve mouth of the vibration transmission body. Thus, different ice-breaking effects can be achieved and different application scenarios can be applied.

[0018] 3. The embodiment of the present application can achieve real-time control of the displacement of the armature ring by controlling the magnitude of the driving current of the electromagnetic attraction part, thereby achieving the effect of controlling the flow rate of the valve port. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a self-ice-breaking solenoid valve with a built-in exciter according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the connection structure of the electromagnetic suction part, the valve control motion part, the exciter and the annular seal in the self-ice-breaking solenoid valve with built-in exciter in the embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the structure of the iron core in the self-ice-breaking solenoid valve with built-in exciter according to an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the connection structure between the exciter, the central guide column, the armature ring and the pressure ring in the exciter built-in self-ice breaking solenoid valve according to the embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of an independent pressing block in a self-ice-breaking solenoid valve with a built-in exciter according to an embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of the structure of the valve seat in the self-ice-breaking solenoid valve with built-in exciter according to an embodiment of the present application;

[0026] Figure 7 This is a schematic diagram of the structure of the hollow valve tube in the self-ice-breaking solenoid valve with built-in exciter according to an embodiment of the present application;

[0027] Figure 8 This is a driving circuit diagram of a piezoelectric chip in a self-ice-breaking solenoid valve with an internal excitation body according to an embodiment of the present application;

[0028] Fig. 9 This is a longitudinal vibration mode diagram of a self-ice-breaking solenoid valve with a built-in excitation body according to an embodiment of the present application;

[0029] Fig.10 This is the torsional vibration mode diagram of the self-ice-breaking solenoid valve with built-in excitation body according to the embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0034] Reference Figure 1 An embodiment of the present application provides a self-ice-breaking solenoid valve with a built-in exciter, including an electromagnetic suction part 1, an iron core 2, a valve-controlled motion part 3, a valve seat 4, an armature ring 5, an exciter 6 and an annular sealing gasket 7.

[0035] Reference Figure 1 , Figure 2 and Figure 6The electromagnetic suction part 1 includes a bracket 101, a winding frame 102, a bracket cover plate 103 and a copper winding 104. Among them, the bracket 101 is provided with a copper winding 104 and a winding frame 102. The copper winding 104 is wound on the winding frame 102 to form an electromagnetic coil. The electromagnetic coil can generate magnetic force through electromagnetic induction phenomenon, and then perform suction control to realize the valve opening and closing control function. A bracket mounting hole 105 is provided at the lower part of the bracket 101, and a threaded connection hole 42 is provided on the upper surface of the valve seat 4. The bolt passes through the bracket mounting hole 105 and is fastened to the valve seat 4 to connect the electromagnetic suction part 1 to the upper surface of the valve seat 4. Therefore, the bracket 101 can protect the internal parts. The mouth of the bracket 101 is provided with a bracket cover plate 103, and the bracket cover plate 103 is provided with a center hole that penetrates along the axial direction.

[0036] Reference Figure 1 , Figure 6 and Figure 7 , the lower end of the bracket 101 is connected to the valve seat 4. The valve seat 4 is a hollow disc, and the lower end of the disc is connected to the hollow valve tube 8. Specifically, the hollow valve tube 8 is pressed in the valve seat 4 by the pressure plate 12. In this way, the hollow valve tube 8 can be pressed and protected. The hollow valve tube 8 and the valve seat 4 are sealed by a seal 11. Specifically, a sealing groove 82 is provided on the outer cylindrical surface of the hollow valve tube 8. The seal 11 is arranged in the sealing groove 82. In this way, the sealing performance of the solenoid valve can be improved. A valve inlet hole 81 is formed in the middle part of the hollow valve tube 8, and the valve inlet hole 81 coincides with the axis of the valve seat 4. A valve outlet hole 41 is also provided on the valve seat 4, and the valve outlet hole 41 runs through the side wall of the valve seat 4 and is connected to the hollow part of the valve seat 4.

[0037] Reference Figures 1 to 3 , an iron core 2 is provided in the electromagnetic suction part 1, and the upper end of the iron core 2 is inserted into the central hole of the bracket cover 103. The lower end of the iron core 2 extends out of the bracket 101 and forms a limit flange 23. A limit groove 43 adapted to the limit flange 23 is provided on the upper end surface of the valve seat 4, and the limit flange 23 is accommodated in the limit groove 43. An installation cavity 21 is provided in the iron core 2, and the installation cavity 21 includes a spring installation cavity 211 and an armature ring installation cavity 212 that are interconnected. The spring installation cavity 211 and the armature ring installation cavity 212 together form a stepped blind hole with an opening facing downward. A guide groove 22 is provided at the mouth of the armature ring installation cavity 212.

[0038] The valve-controlled motion part 3 is provided in the installation cavity 21. The valve-controlled motion part 3 includes a central guide column assembly 31, a spring 32, a guide sleeve 33 and a pressure ring 34. The two ends of the spring 32 abut against the top surface of the spring installation cavity 211 and the upper end surface of the central guide column assembly 31 respectively. The central guide column assembly 31 is located above the hollow valve tube 8, and the lower end surface of the central guide column assembly 31 abuts against the upper end surface of the hollow valve tube 8. The central guide column assembly 31 includes a lower large end and an upper small end. The armature ring 5 and the pressure ring 34 are connected to the outer cylindrical surface of the upper small end of the central guide column assembly 31. The diameter of the pressure ring 34 is larger than the aperture of the spring installation cavity 211 and is located above the armature ring 5. An excitation body 6 is provided between the armature ring 5 and the large end of the central guide column assembly 31. The excitation body 6 can excite ultrasonic waves and realize directional transmission of sound energy, so that ultrasonic waves are transmitted to the lower end surface of the central guide column assembly 31, and heat and shear stress are generated.

[0039] When the center guide column assembly 31 moves to the lower limit position, the lower end surface of the center guide column assembly 31 abuts against the upper end surface of the hollow valve tube 8, and the valve inlet hole 81 and the valve outlet hole 41 are disconnected; when the center guide column assembly 31 leaves the lower limit position, the valve inlet hole 81 and the valve outlet hole 41 are connected, and the liquid enters the valve seat 4 through the valve inlet hole 81 and flows out from the valve outlet hole 41.

[0040] Specifically, refer to Figure 4 and Figure 5 The center guide column assembly 31 includes a center guide column 311 and an independent pressure block 312 connected to the lower part of the center guide column 311. The center guide column 311 also includes a guide pin 313, a guide column counterbore 315 and a guide column shoulder 314. The guide column shoulder 314 abuts against the lower end of the spring 32, and the longitudinal movement of the center guide column 311 is controlled by the longitudinal elastic force of the spring 32. The guide pin 313 abuts against the spring installation cavity 211 and can slide relatively. The center guide column 311 passes through the excitation body 6, the armature ring 5 and the pressure ring 34 in sequence. The excitation body 6 is in contact with the armature ring 5 and is fixedly connected by the center guide column 311. Under the action of the external alternating electric field, the excitation body 6 generates mechanical vibration, and the vibration is transmitted to the lower end surface of the independent pressure block 312 through the center guide column 311 to achieve ultrasonic deicing.

[0041] The upper end of the independent pressing block 312 is also provided with a pressing block boss 3121. The pressing block boss 3121 is connected to the guide column counterbore 315, so that the longitudinal movement of the central guide column 311 can drive the longitudinal movement of the independent pressing block 312, thereby controlling the opening and closing of the valve port. The lower end face of the independent pressing block 312 abuts against the upper end face of the hollow valve tube 8, and the diameter of the lower end face of the independent pressing block 312 is equal to the outer diameter of the hollow valve tube 8. In this way, energy waste can be reduced and ice breaking efficiency can be improved.

[0042] Reference Figure 1 and Figure 2The guide sleeve 33 is arranged in the guide groove 22. Thus, the guide sleeve 33 can play a certain sealing role on the armature installation cavity 212, and can also play a guiding role when the central guide column assembly 31 moves up and down.

[0043] An annular sealing gasket 7 is provided in the annular cavity between the valve seat 4 and the central guide column assembly 31, and the annular sealing gasket 7 is arranged close to the electromagnetic suction part 1. Thus, the installation cavity of the iron core can be isolated from the inner cavity of the valve seat, ensuring that the controlled fluid will not overflow into the iron core cavity, and protecting the internal parts of the valve body.

[0044] Specifically, the annular sealing gasket 7 includes an inner edge 71, an outer edge 72 and a middle portion 73 connected between the inner edge 71 and the outer edge 72. For ease of installation, the thickness of the inner edge 71 and the outer edge 72 are both greater than the thickness of the middle portion.

[0045] An outer sealing groove 9 is formed between the limiting flange 23 and the limiting groove 43. The outer edge 72 of the annular sealing gasket 7 is pressed tightly in the outer sealing groove 9. It should be noted that the outer sealing groove 9 can be partially arranged on the limiting flange 23 and the other part on the limiting groove 43, or all of it can be arranged on the limiting flange 23 or the limiting groove 43, which is not limited here.

[0046] An inner sealing groove 10 is formed between the central guide column 311 and the independent pressing block 312, and the inner edge 71 of the annular sealing gasket 7 is pressed against the inner sealing groove 10. It should be noted that the inner sealing groove 10 may be partially disposed on the central guide column 311 and the other partially disposed on the independent pressing block 312, or may be entirely disposed on the central guide column 311 or the independent pressing block 312, which is not limited here.

[0047] Reference Figure 4 and Figure 8In some embodiments, the excitation body 6 is a piezoelectric ultrasonic excitation unit, including an electrode sheet group 61 and a piezoelectric chip group 62. The electrode sheet group 61 and the piezoelectric chip group 62 are pressed between the armature ring 5 and the large end of the center guide column 311. The electrode sheet group 61 includes a lower electrode sheet 611, an intermediate electrode sheet 612 and an upper electrode sheet 613. The piezoelectric chip group 62 includes a lower piezoelectric chip 621 and an upper piezoelectric chip 622. The lower electrode sheet 611, the lower piezoelectric chip 621, the intermediate electrode sheet 612, the upper piezoelectric chip 622 and the upper electrode sheet 613 are arranged in sequence from bottom to top. The lower electrode sheet 611 and the upper electrode sheet 613 are connected to the first pole of the alternating signal driving power supply, and the intermediate electrode sheet 612 is connected to the second pole of the alternating signal driving power supply. The small end of the central guide column 311 passes through the lower electrode sheet 611, the lower piezoelectric chip 621, the middle electrode sheet 612, the upper piezoelectric chip 622 and the upper electrode sheet 613 in sequence and is fastened to the armature ring 5. Thus, the electrode sheet group 61 and the piezoelectric chip group 62 form a piezoelectric transducer to generate ultrasonic excitation. The electrode sheet group 61 is electrically connected to the alternating signal driving power supply, and the alternating signal driving power supply can provide an alternating voltage to drive the excitation body 6 to generate ultrasonic vibration.

[0048] It should be noted that the excitation body 6 may also be an electromagnetic excitation unit or other excitation bodies, which is not limited here.

[0049] Since the excitation body 6 uses two piezoelectric chips, the two piezoelectric chips are connected in parallel. Therefore, the piezoelectric chip can generate mechanical vibration under the action of an external electric field, and the central guide column 311 and the independent pressing block 312 use their own vibration mode to transmit the vibration energy of the piezoelectric chip to the lower end face of the independent pressing block 312 in a direction. Therefore, when the valve port formed between the lower end face of the independent pressing block 312 and the upper end face of the hollow valve tube 8 is frozen, the ultrasonic wave transmitted to the lower end face of the independent pressing block 312 will generate heat and shear stress at the interface, achieving ultrasonic ice breaking.

[0050] Reference Fig. 9 In some embodiments, the polarization direction of the piezoelectric chip group 62 is the circumferential direction of the piezoelectric chip group 62. The polarization directions of the two piezoelectric chips are arranged in opposite directions, the upper electrode sheet 613 is in contact with the inner circular surface of the upper piezoelectric chip 622, the middle electrode sheet 612 is in contact with the outer circular surface of the upper piezoelectric chip 622, the middle electrode sheet 612 is in contact with the inner circular surface of the lower piezoelectric chip 621, the lower electrode sheet 611 is in contact with the outer circular surface of the lower piezoelectric chip 621, the upper electrode sheet 613 is connected to the lower electrode sheet 611 and is connected to one pole of the alternating signal driving power supply, and the middle electrode sheet 612 is connected to the other pole of the alternating signal driving power supply. Under the action of the external electric field, the lower end surface of the central guide column assembly 31 generates torsional vibration in the circumferential direction.

[0051] Reference Fig.10In other embodiments, the polarization direction of the piezoelectric chip group 62 is the axial direction of the piezoelectric chip group 62 (the direction indicated by the arrow). The polarization directions of the two piezoelectric chips are arranged in reverse, the upper electrode sheet 613 is in contact and conduction with the upper end surface of the upper piezoelectric chip 622, the middle electrode sheet 612 is in contact and conduction with the lower end surface of the upper piezoelectric chip 622, the middle electrode sheet 612 is in contact and conduction with the upper end surface of the lower piezoelectric chip 621, the lower electrode sheet 611 is in contact and conduction with the lower end surface of the lower piezoelectric chip 621, the upper electrode sheet 613 is connected and conduction with the lower electrode sheet 611 and is connected with one pole of the alternating signal driving power supply, and the middle electrode sheet 612 is connected with the other pole of the alternating signal driving power supply. Under the action of the external electric field, the lower end surface of the central guide column assembly 31 generates longitudinal telescopic vibration.

[0052] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A self-ice-breaking solenoid valve with a built-in exciter, characterized in that: It includes an electromagnetic suction part and a valve seat connected up and down; The valve seat is provided with a valve outlet hole and a hollow valve tube, and the hollow valve tube is provided with a valve inlet hole; An iron core is provided in the electromagnetic suction part, a mounting cavity is provided in the iron core, a valve-controlled moving part is provided in the mounting cavity, and the valve-controlled moving part includes a central guide column assembly slidably connected in the mounting cavity; the central guide column assembly is located above the hollow valve tube; when the central guide column assembly moves to the lower limit position, the lower end surface of the central guide column assembly abuts against the upper end surface of the hollow valve tube, and the valve inlet hole and the valve outlet hole are disconnected; when the central guide column assembly leaves the lower limit position, the valve inlet hole and the valve outlet hole are connected; The central guide column assembly comprises a lower large end and an upper small end, an armature ring is sleeved on the upper small end of the central guide column assembly, and an exciter is provided between the armature ring and the lower large end of the central guide column assembly; the exciter can excite ultrasonic waves and realize directional transmission of sound energy, so that ultrasonic waves are transmitted to the lower end surface of the central guide column assembly and generate heat and shear stress; An annular sealing gasket is provided between the valve seat and the central guide column assembly; the annular sealing gasket is arranged close to the electromagnetic suction part; The center guide column assembly includes a center guide column and an independent pressure block connected to the lower part of the center guide column; the lower end surface of the independent pressure block abuts against the upper end surface of the hollow valve tube; the inner end of the annular sealing gasket is pressed between the center guide column and the independent pressure block.

2. The self-ice-breaking solenoid valve with built-in exciter according to claim 1, characterized in that: The excitation body is a piezoelectric ultrasonic excitation unit; it includes an electrode sheet group and a piezoelectric chip group; The electrode sheet group includes a lower electrode sheet, a middle electrode sheet and an upper electrode sheet; the piezoelectric chip group includes a lower piezoelectric chip and an upper piezoelectric chip; The lower electrode sheet, the lower piezoelectric wafer, the middle electrode sheet, the upper piezoelectric wafer and the upper electrode sheet are arranged in sequence from bottom to top; The lower electrode sheet and the upper electrode sheet are connected to the first pole of the alternating signal driving power supply; and the middle electrode sheet is connected to the second pole of the alternating signal driving power supply.

3. The self-ice-breaking solenoid valve with built-in exciter according to claim 2, characterized in that: The polarization direction of the piezoelectric chip group is the axial direction of the piezoelectric chip group.

4. The self-ice-breaking solenoid valve with built-in exciter according to claim 2, characterized in that: The polarization direction of the piezoelectric chip group is the circumferential direction of the piezoelectric chip group.

5. The self-ice-breaking solenoid valve with built-in exciter according to claim 1, characterized in that: The valve-controlled motion part also includes a spring, a pressure ring and a guide sleeve; the installation cavity includes a spring installation cavity and an armature ring installation cavity which are interconnected; the two ends of the spring respectively abut the top surface of the spring installation cavity and the upper end surface of the center guide column assembly; the lower end surface of the center guide column assembly abuts the upper end surface of the hollow valve tube; a guide sleeve is provided between the outer cylindrical surface of the lower end of the center guide column assembly and the inner wall surface of the armature ring installation cavity; the diameter of the pressure ring is larger than the aperture of the spring installation cavity, and the pressure ring is sleeved on the center guide column assembly and is located above the armature ring.

6. The self-ice-breaking solenoid valve with built-in exciter according to claim 1, characterized in that: The electromagnetic suction part comprises a bracket connected to the upper surface of the valve seat; a copper winding and a winding skeleton are arranged in the bracket, and a bracket cover plate is arranged at the mouth of the bracket.

7. The self-ice-breaking solenoid valve with built-in exciter according to claim 6, characterized in that: The lower end of the iron core extends out of the winding frame and forms a limiting flange. The upper end surface of the valve seat is provided with a limiting groove matched with the limiting flange, and the limiting flange is accommodated in the limiting groove; the outer end of the annular sealing gasket is pressed between the limiting flange and the bottom of the limiting groove.

8. The self-ice-breaking solenoid valve with built-in exciter according to claim 1, characterized in that: The valve inlet hole extends along the axial direction of the valve seat, and the valve outlet hole extends along the radial direction of the valve seat.

9. The self-ice-breaking solenoid valve with built-in exciter according to claim 8, characterized in that: The hollow valve tube and the valve seat are sealed by a sealing member.

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