Electromagnetic valve coil assembly

Abstract

The invention relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve coil assembly which is used in cooperation with a conveying pipe and comprises a shell, a fixed iron core, a branch magnetic ring, a coil winding and a movable iron core, an inner cavity is formed in the shell, the coil winding is connected into the inner cavity, and the movable iron core comprises a telescopic shell, a movable core, a compression spring, a water outlet groove and a water inlet groove. The telescopic shell is connected to the lower end of the fixed iron core. By arranging the movable core and the telescopic shell, an original movable iron core is arranged to be of a double-layer structure, when the telescopic shell is frozen, the electromagnetic valve can still be started through movement of the movable core in the telescopic shell, and when the interior of the pipeline is frozen, internal ice blocks are heated through heat of the electromagnetic valve; and meanwhile, the situation that the electromagnetic valve is burnt out due to the fact that the electromagnetic valve is started during freezing can be avoided, meanwhile, the movable core moves up and down, a piston structure is formed in the telescopic shell, molten water circulates between ice blocks and gaps, and melting of the ice blocks is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valves, in particular to a solenoid valve coil assembly. Background Art

[0002] Solenoid valves are mechanical devices controlled by electromagnetics. They are often used in industrial control systems as devices for adjusting the direction, flow rate, speed and other parameters of the flowing medium. The basic structure of a solenoid valve consists of a valve core with one or more holes and an electromagnetic coil winding assembly. The valve core consists of a sliding valve core, a sliding valve sleeve, a spring base, etc. The electromagnetic coil winding assembly consists of a fixed iron core, a moving iron core, a coil winding and other components. When the coil winding is powered on or off, it controls the operation of the moving iron core, and the operation of the moving iron core controls the opening and closing of the valve core.

[0003] There are many types of solenoid valves, including normally closed pilot solenoid valves. Pilot solenoid valves are often used in pipeline transportation because they can control large flow media. Pilot solenoid valves divide the pipeline into two layers, upper and lower, through a diaphragm. When the solenoid valve is closed, the pilot hole is closed, and the liquid stays above the diaphragm, so that the pressure above the diaphragm is greater than the pressure below and the outlet is blocked. When the solenoid valve is opened, the pilot hole will be opened first, and the liquid will flow out of the pilot hole. At this time, the pressure above the diaphragm is less than the pressure below, and the diaphragm is lifted up to fully open the outlet. However, in the application process of sewage treatment plants, when controlling the flow of sewage to the regulating tank, the regulating tank needs to be cleaned regularly. The solenoid valve will be closed during cleaning. When closed, water will remain above the diaphragm. Because the volume above the diaphragm is smaller than the volume of the pipe and the structure is relatively flat, the space above the diaphragm will freeze faster than the inside of the pipe in cold winter weather, and the water above the diaphragm is in a static state, making the space above the diaphragm more easily frozen by the residual water. The presence of impurities in the sewage further makes it easy for the residual water to freeze. The frozen water will freeze the valve core and make it unable to move, thereby affecting the normal operation of the solenoid valve. When the current is large, when the moving iron core and the fixed iron core cannot contact in time, a large excitation current will appear inside the coil winding, thereby burning the coil winding.

[0004] In order to solve the problem of ice formation inside the solenoid valve in the prior art, after ice forms inside the solenoid valve, the solenoid valve is generally heated by pouring hot water or blowing hot air to melt the ice inside the solenoid valve. However, the hot water or hot air cannot directly contact the ice, but heats the ice through heat conduction on the inner wall of the pipe, which results in a slow dissolution speed and a long time consumption. Summary of the invention

[0005] The object of the present invention is to provide a solenoid valve coil assembly. In order to solve the problem that the solenoid valve cannot work normally or even the coil is damaged after the solenoid valve is frozen inside, the moving iron core is set to a double layer so that the moving iron core can still move after the valve core is frozen, and the heat of the solenoid valve coil is used to heat the inside. When the moving iron core moves, the melted liquid is caused to circulate inside the solenoid valve, thereby accelerating the melting of ice inside the solenoid valve, thereby solving the problem that the solenoid valve cannot work normally or even the coil is damaged after the solenoid valve is frozen inside.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A solenoid valve coil assembly, used in conjunction with a transport pipe, comprises an outer shell, a fixed iron core, a magnetic ring, a coil winding and a moving iron core, wherein an inner cavity is provided inside the outer shell, wherein the coil winding is connected to the inner cavity, wherein the moving iron core comprises a telescopic shell, a movable core, a compression spring, a water outlet groove and a water inlet groove, wherein the telescopic shell is connected to the lower end of the fixed iron core, and a valve core is connected to the lower end of the telescopic shell, wherein the movable core is connected to the inside of the telescopic shell, wherein the water outlet groove is provided on both sides of the inner wall of the telescopic shell, wherein the water inlet groove is provided at the bottom end of the telescopic shell, wherein the water outlet groove is provided on both sides of the inner wall of the telescopic shell, wherein the water inlet groove is provided at the bottom end of the telescopic shell, wherein the water outlet groove is provided on the inner wall of the telescopic shell, wherein the water outlet groove is provided on ... The compression spring is connected between the movable core and the telescopic shell, and there is a gap between the telescopic shell and the inner wall of the outer shell. When the telescopic shell is not fixed, power is turned on to make the movable core move up and engage with the fixed iron core, and the telescopic shell is pulled to shrink by the compression spring, and the valve core is driven to move up at the same time. When power is off, the telescopic shell and the movable core are reset. When the telescopic shell is fixed, power is turned on to make the movable core move upward and engage with the fixed iron core, and water is sucked into the telescopic shell from the water inlet groove and the compression spring is pulled up. When power is off, the compression spring pulls the movable core down and discharges the water from the water outlet groove.

[0008] In the above scheme, after the solenoid valve is frozen, the solenoid valve is started to heat the ice cubes using the heat of the solenoid valve itself. In the prior art, the moving iron core is directly connected to the valve core. Therefore, when the valve core is frozen, the moving iron core cannot move. The solenoid valve is started without knowing it, causing a large excitation current to appear inside the solenoid valve, thereby burning the coil. Therefore, the heat of the solenoid valve itself cannot be used to heat the ice cubes inside. Therefore, in this scheme, the moving iron core is set to a double-layer structure of a telescopic shell and a movable core. When the telescopic shell is frozen, the movable core inside can still move, and the movable core is equivalent to the original moving iron core, avoiding the air gap of the solenoid valve to be too large. Therefore, when the inside is frozen, the solenoid valve can be started to heat the ice cubes inside using the heat of the solenoid valve itself, and at the same time, it can also avoid starting the solenoid valve when ice forms. In order to prevent the solenoid valve from being burned out, a gap is left between the telescopic shell and the inner wall of the outer shell so that a thin layer of ice will form on the outer wall of the telescopic shell when ice forms. Since this thin layer of ice is inside the solenoid valve, it will melt first. The melted water will continue to be heated as a heating medium to heat the remaining ice cubes. When the movable core moves, it forms a piston structure with the inner wall of the telescopic shell. When the movable core moves, it continuously transports the heated water to the bottom of the solenoid valve and contacts the ice cubes. The heated water circulates between the ice cubes and the gap, thereby accelerating the melting of the ice cubes. In addition to retaining the heating medium when ice forms, a gap is left between the telescopic shell and the inner wall of the outer shell to allow the heating medium to remain when ice forms. When the ice forms and the ice is not frozen and working normally, the flowing water exchanges heat with the inside of the solenoid valve through the gap to cool down the solenoid valve, thereby avoiding the solenoid valve from working for a long time and causing the coil winding to be burned out.

[0009] Preferably, a heat sink is connected between the coil windings, the heat sink is made of aluminum, the heat sink is connected to the inner cavity, a circulation component is connected inside the heat sink, and the circulation component passes through the heat sink and the fixed iron core and extends into the transport pipe.

[0010] In the above scheme, the heat dissipation plate is used to absorb the Joule heat generated by the coil and transfer it to the outer shell. The circulation component is passed through the heat dissipation plate, and the circulation component is used to absorb the heat on the heat dissipation plate, thereby further improving the heat dissipation effect of the heat dissipation plate.

[0011] Preferably, the thickness of the coil winding above the heat dissipation plate is smaller than the thickness of the coil winding below, and the length of the coil winding above is equal to the length of the fixed iron core.

[0012] In the above scheme, in order to improve the utilization of coil heat and thus change the distribution of the winding, the heat generated by the coil winding is related to the resistance in the winding and the current in the winding, because the magnitude of the current remains unchanged when the solenoid valve is working, and the resistance of the winding is related to the length of the copper wire in the winding. The longer the length, the greater the resistance. However, the total length of the copper wire in the winding is unchanged. Increasing the thickness of the winding of the lower layer of the heat sink and reducing the thickness of the winding of the upper layer is equivalent to dividing a winding into two parts. The length of the copper wire of the upper layer is less than that of the copper wire of the lower layer, so that the resistance of the lower layer is greater than that of the upper layer, and therefore the heat generated by the lower layer is also greater than the heat generated, thereby concentrating most of the heat generated by the winding in the lower layer, leaving a gap between the telescopic shell and the inner wall of the outer shell to absorb more heat, thereby accelerating the temperature rise in the gap, and at the same time, the thickness of the winding of the upper layer of the heat sink is reduced, thereby increasing the heat dissipation space of the winding and improving the heat dissipation effect of the upper winding.

[0013] Preferably, the circulation component includes a spring tube, an air inlet pipe, an air outlet pipe and a one-way pipe. The one-way pipe is connected to the fixed iron core, and both ends extend to the outside of the outer shell through the heat sink. The air inlet pipe and the air outlet pipe are respectively connected to the left and right sides of the one-way pipe. A diaphragm is connected to the inside of the transport pipe. The spring tube is connected above the diaphragm and is connected to the air inlet pipe and the air outlet pipe. The inside of the spring tube is filled with nitrogen.

[0014] In the above scheme, in order to accelerate the melting of ice inside the pipeline, the ice above the diaphragm is heated by the circulation component, the nitrogen is heated by the solenoid valve, and is transported to the spring tube through the air intake pipe. The spring tube is used to heat the ice on the inner wall of the pipeline. In addition to serving as a heating source, the spring tube also plays the role of the original spring on the diaphragm.

[0015] Preferably, the one-way tube is made of elastic material, and is internally connected to an annular membrane, the cross-section of the annular membrane is set to an isosceles trapezoid, and two annular membranes are located on both sides of the one-way tube. A top column is connected to the top of the movable core, and a pressure plate is movably connected to the inside of the fixed iron core, and the top column passes through the fixed iron core and cooperates with the pressure plate.

[0016] In the above scheme, the flow of gas inside the circulation component is restricted by the annular membrane. When the top column squeezes the one-way tube through the pressure plate, the gas in the one-way tube will only flow into the intake pipe under the restriction of the movable shell. At the same time, the top column plays a buffering role on the movable core when squeezing the one-way tube through the pressure plate.

[0017] Preferably, the air outlet pipe and the air inlet pipe extend to the outside, and the diameter of the pipe is the same as that of the spring pipe, and the diameter of the one-way pipe is smaller than the diameters of the air outlet pipe and the air inlet pipe.

[0018] In the above scheme, the diameter of the one-way tube is set to be smaller than the diameter of the intake pipe, so that when the movable core squeezes the one-way tube, the gas in the one-way tube can flow into the intake pipe more quickly, thereby reducing the time required for the movable core to squeeze the one-way tube.

[0019] Preferably, the moving iron core further comprises a connecting shell, the connecting shell is connected to the lower end of the movable core, and the outer wall of the connecting shell is connected to the telescopic shell.

[0020] In the above scheme, in order to enable the movable core to move better, a connecting shell is movably sleeved on the bottom end of the movable core, and the interior of the connecting shell is made of a material that can be adsorbed by a magnet. When it is not frozen, the connecting shell blocks the water outlet and the water inlet to prevent water from entering the telescopic shell. If the connecting shell is not used, but the movable core is directly used to block the water outlet and the water inlet, the movable core will be frozen when it freezes. Therefore, when it freezes, the water in the water outlet and the water inlet will only freeze the connecting shell, thereby not affecting the movement of the movable core. When the ice in the gap between the telescopic shell and the inner wall of the outer shell melts, the solenoid valve is energized, and the movable core is magnetically adsorbed to the connecting shell. When the movable core moves upward, it will drive the connecting shell to move upward together. When the telescopic shell moves upward, the water in the gap flows from the water outlet to the bottom of the inner wall of the telescopic shell. When the movable core moves downward, the water will be squeezed out of the water outlet through the connecting shell.

[0021] Preferably, the cross section of the water inlet trough is set to be an inverted T-shape, and the water outlet trough and the inside of the water inlet trough are both connected with an annular membrane.

[0022] In the above scheme, the water inlet groove is set to an inverted T shape, and air pressure and gravity are used to prevent water from entering the telescopic shell from the water inlet groove when it is not frozen. The telescopic shell is filled with water, thereby affecting the movement of the movable core after freezing, and the flow direction of water in the water inlet groove and the water outlet groove is limited by the annular membrane.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. By setting a movable core and a telescopic shell, the original moving iron core is set to a double-layer structure. When the telescopic shell is frozen, the movable core inside moves so that when the inside of the pipe is frozen, the solenoid valve can still be started, and the heat of the solenoid valve itself can be used to heat the ice inside. At the same time, it can also avoid the situation where the solenoid valve is started when it is frozen and causes the solenoid valve to be burned. At the same time, the movable core moves up and down to form a piston structure with the inside of the telescopic shell, which will make the melted and heated water circulate between the ice and the gap, thereby accelerating the melting of the ice.

[0025] 2. By setting up a circulation component, the spring tube in the circulation component is used to heat the ice above the diaphragm to further accelerate the melting of the ice. In addition to serving as a heating source, the spring tube also plays the role of the original spring on the diaphragm. At the same time, the one-way tube in the circulation component passes through the fixed iron core and the heat sink, thereby cooling the coil winding.

[0026] 3. By changing the thickness distribution of the winding, the thickness of the coil winding below the heat sink is greater than that of the coil winding above, so that the heat generated by the solenoid valve is concentrated on the lower layer of the heat sink, thereby improving the heating efficiency of the gap and accelerating the temperature rise between the gaps. In addition, the thickness of the winding on the upper layer of the heat sink is reduced, which increases the heat dissipation space of the winding and improves the heat dissipation effect of the upper winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a left side cross-sectional schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the moving iron core of the present invention;

[0029] Figure 3 For the present invention Figure 1 The enlarged structural diagram of part A in the middle;

[0030] Figure 4 It is a schematic diagram of the spring tube structure of the present invention;

[0031] Figure 5 It is a front cross-sectional schematic diagram of the present invention;

[0032] Figure 6 For the present invention Figure 5 The enlarged structural diagram of part B in the middle;

[0033] Figure 7 It is a schematic diagram of water flowing in a delivery pipe of the present invention;

[0034] Figure 8 It is a schematic diagram of the telescopic shell drainage of the present invention;

[0035] Fig. 9 It is a schematic diagram of the telescopic shell absorbing water of the present invention.

[0036] In the figure: 1. transport pipe; 101. diaphragm; 102. pilot hole; 2. outer shell; 201. inner cavity; 202. gap; 3. fixed iron core; 4. magnetic ring; 5. coil winding; 6. moving iron core; 601. telescopic shell; 602. movable core; 603. compression spring; 604. water outlet trough; 605. water inlet trough; 606. connecting shell; 607. top column; 608. pressure plate; 7. circulation component; 701. spring tube; 702. air inlet pipe; 703. air outlet pipe; 704. one-way pipe; 8. valve core; 9. heat sink; 10. annular diaphragm. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and combine the working state to make its structural features more detailed. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 9 The present invention provides a solenoid valve coil assembly, and the technical solution is as follows:

[0039] A solenoid valve coil assembly, used in conjunction with a transport pipe 1, referring to Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 and Fig. 9, including a shell 2, a fixed iron core 3, a magnetic ring 4, a coil winding 5 and a moving iron core 6, the shell 2 is connected to the top of the transport pipe 1, the fixed iron core 3 is connected to the inside of the shell 2, the magnetic ring 4 is connected to the inside of the fixed iron core 3, the shell 2 is provided with an inner cavity 201, the coil winding 5 is connected to the inner cavity 201, the moving iron core 6 includes a telescopic shell 601, a movable core 602, a compression spring 603, a water outlet trough 604 and a water inlet trough 605, the telescopic shell 601 is connected to the lower end of the fixed iron core 3, and the lower end of the telescopic shell 601 is connected to a valve core 8, the movable core 6 02 is connected to the inside of the telescopic shell 601, the water outlet groove 604 is opened on both sides of the inner wall of the telescopic shell 601, the water inlet groove 605 is opened at the bottom of the telescopic shell 601, the compression spring 603 is connected between the movable core 602 and the telescopic shell 601, and there is a gap 202 between the telescopic shell 601 and the inner wall of the outer shell 2. Because the gap between the fixed iron core 3 and the moving iron core 6 and the coil winding 5 in the solenoid valve is called an air gap, a proper air gap can improve the performance of the solenoid valve, so the gap 202 can also be used as an air gap, and the gap 202 can not only be used in the case of ice formation, but also can be used in the case of ice formation. When the heating medium is retained, the flowing water flows into the gap 202 when it is not frozen, and the electromagnetic valve is cooled. When the telescopic shell 601 is not fixed, the movable core 602 is powered on to move up and attract the fixed iron core 3, and at the same time, the telescopic shell 601 is pulled to shrink by the compression spring 603, and the valve core 8 is driven to move up. When the power is off, the telescopic shell 601 and the movable core 602 are reset. When the telescopic shell 601 is fixed, the movable core 602 is powered on to move up and attract the fixed iron core 3, and at the same time, water is sucked into the telescopic shell 601 from the water inlet trough 605, and the compression spring 603 is pulled up. When the power is off, the compression spring 603 pulls The movable core 602 moves downward and discharges water from the water outlet groove 604. The cross-section of the water outlet groove 604 is set to be Z-shaped, and the water outlet is located above the water inlet of the water inlet groove 605. Because the density of hot water is different from that of cold water, the heated water will flow above the gap 202, while the cooled water will flow downward. Therefore, the water outlet of the water outlet groove 604 is set above the water inlet of the water inlet groove 605, so that the heated water can circulate better between the ice cubes and the gap 202. In order to increase the circulation rate of water, when ice forms inside the solenoid valve, the frequency of opening and closing of the solenoid valve can be appropriately increased.

[0040] As an embodiment of the present invention, refer to Figure 2 , Figure 4 and Figure 5A heat sink 9 is connected between the coil windings 5, and the heat sink 9 is made of aluminum. The heat sink 9 is connected to the inner cavity 201. The heat generated by the coil windings 5 ​​during operation is transferred to the inner wall of the shell 2 through the heat sink 9, so that the ice in the gap 202 melts faster. A circulation component 7 is connected inside the heat sink 9. The circulation component 7 passes through the heat sink 9 and the fixed iron core 3 and extends to the transport pipe 1. At the same time, heat is exchanged with the gas in the circulation component 7. While cooling the coil windings 5, the nitrogen in the circulation component 7 is heated by heat exchange. The circulation component 7 includes a spring tube 701, an air inlet pipe 702, an air outlet pipe 703 and a one-way pipe 704. The one-way pipe 704 is connected to the fixed iron core 3, and both ends extend to the outside of the shell 2 through the heat sink 9. When the outer wall of the transport pipe 1 is covered with insulation material, the extended air inlet pipe 702 will heat the insulation material, thereby increasing its cooling time when the solenoid valve is closed. The air inlet pipe 702 and the air outlet pipe 703 are respectively connected to the left and right sides of the one-way pipe 704. The transport pipe 1 is connected with a diaphragm 101 inside. The spring tube 701 is connected above the diaphragm 101 and is connected with the air inlet pipe 702 and the air outlet pipe 703. The spring tube 701 is filled with nitrogen. The heated nitrogen enters the spring tube 701 through the air inlet pipe 702, thereby heating the ice cubes outside the spring tube 701, thereby accelerating the melting of the ice cubes inside the solenoid valve.

[0041] As an embodiment of the present invention, refer to Figure 2 The thickness of the coil winding 5 above the heat sink 9 is smaller than that of the coil winding 5 below, and the length of the coil winding 5 above is equal to the length of the fixed iron core 3, so that the heat generated by the solenoid valve is concentrated on the lower layer of the heat sink 9, and the lower layer of the heat sink 9 is the position of the gap 202, so that most of the heat generated by the coil winding 5 of the solenoid valve is used to heat the gap 202, thereby accelerating the temperature increase in the gap 202. At the same time, the thickness of the winding on the upper layer of the heat sink 9 is reduced, which increases the heat dissipation space of the winding and improves the heat dissipation effect of the upper winding.

[0042] As an embodiment of the present invention, refer to Figure 6The one-way tube 704 is made of elastic material. An annular membrane 10 is connected inside the one-way tube 704. The cross section of the annular membrane 10 is set to be an isosceles trapezoid. When the gas flows from the wide side of the annular membrane 10 to the narrow side, the narrow side will be slightly expanded. When the gas flows from the narrow side to the wide side, the narrow side will quickly shrink and close under the thrust of the water flow, thereby restricting the flow of the gas, thereby realizing the one-way flow of the gas in the one-way tube 704. The two annular membranes 10 are located on both sides of the one-way tube 704. The movable core 602 is on the top The top column 607 is connected to the fixed iron core 3, and the pressure plate 608 is movably connected inside the fixed iron core 3. The top column 607 passes through the fixed iron core 3 and cooperates with the pressure plate 608. When the movable core 602 moves upward, it drives the top column 607 to move upward and pushes the pressure plate 608 to squeeze the one-way tube 704. Due to the restriction of the annular membrane 10, the gas is squeezed into the air inlet pipe 702. When the movable core 602 moves downward, the one-way tube 704 returns to its original state and sucks in the gas in the air outlet pipe 703, thereby realizing the gas circulation in the spring tube 701.

[0043] As an embodiment of the present invention, refer to Figure 5 The outlet pipe 703 and the inlet pipe 702 extend to the outside, and the diameter of the pipe is the same as that of the spring tube 701, thereby eliminating the pressure existing when the gas flows between the outlet pipe 703, the inlet pipe 702 and the spring tube 701, making the nitrogen flow smoother. The diameter of the one-way tube 704 is smaller than that of the outlet pipe 703 and the inlet pipe 702, thereby reducing the pressure of the nitrogen flowing from the one-way tube 704 to the inlet pipe 702, making it easier for the nitrogen in the one-way tube 704 to be squeezed into the inlet pipe 702, reducing the time required for the movable core 602 to squeeze the one-way tube 704.

[0044] As an embodiment of the present invention, refer to Figure 3 The movable iron core 6 also includes a connecting shell 606, which is connected to the lower end of the movable core 602, and the outer wall is connected to the telescopic shell 601. When it is not frozen, when the movable core 602 pulls the telescopic shell 601 to move upward, the connecting shell 606 is in a stationary state relative to the telescopic shell 601, thereby blocking the water outlet groove 604 and the water inlet groove 605 to prevent water from entering the telescopic shell 601. When freezing, the water in the water outlet groove 604 and the water inlet groove 605 will freeze the connecting shell 606. After the solenoid valve is started, the movable core 602 is separated from the connecting shell 606. When the ice in the gap 202 between the telescopic shell 601 and the inner wall of the outer shell 2 melts, the movable core 602 is adsorbed on the connecting shell 606, and drives the connecting shell 606 to move in the telescopic shell 601, thereby sucking in and discharging the water in the gap 202.

[0045] As an embodiment of the present invention, refer to Figure 3The cross section of the water inlet groove 605 is set to an inverted T shape. When it is not frozen, the water inlet groove 605 is prevented from entering the inner wall of the telescopic shell 601 under the action of air pressure and gravity. The water outlet groove 604 and the inside of the water inlet groove 605 are both connected with an annular membrane 10, thereby limiting the flow direction of water in the water inlet groove 605 and the water outlet groove 604.

[0046] Working principle: when there is no ice inside the transport pipe 1, the solenoid valve is energized, and the movable core 602 generates magnetism under the action of the coil winding 5, and attracts the fixed iron core 3. Under the attraction of the fixed iron core 3, the movable core 602 moves upward. During the upward movement, the telescopic shell 601 is pulled upward by the compression spring 603. When the telescopic shell 601 moves upward, the valve core 8 is pulled upward, thereby opening the pilot hole 102, and water flows out from the pilot hole 102, so that the pressure below the diaphragm 101 is less than the pressure above the diaphragm 101, thereby pushing the diaphragm 101 upward and opening the outlet. After power failure, the telescopic shell 601 extends and resets, and the movable core 602 resets under the action of the compression spring 603 and gravity.

[0047] When ice forms inside the transport pipe 1, the telescopic shell 601 and the valve core 8 are frozen and cannot move. In order to enable the solenoid valve to start normally, the moving iron core 6 is set to a double-layer structure so that the solenoid valve can still be started when ice forms inside. The heat generated by the coil winding 5 when the solenoid valve is started is used to heat and melt the ice inside the valve core 8.

[0048] Specifically, when ice forms inside the solenoid valve, the solenoid valve is started, and the movable core 602 generates magnetic force under the action of the coil winding 5. Under the action of the magnetic force, the movable core 602 moves upward and is adsorbed to the fixed iron core 3, thereby avoiding the air gap inside the solenoid valve being too large, resulting in the generation of excitation current and burning the coil winding 5. During the solenoid valve startup process, the ice in the gap 202 between the telescopic shell 601 and the inner wall of the shell 2 melts first. When all the ice in the gap 202 melts, the movable core 602 moves up and down, which drives the connecting shell 606 to move up and down, thereby connecting with the telescopic shell 601. A piston structure is formed inside the retractable shell 601. When power is turned on, the movable core 602 moves upward and absorbs the connecting shell 606, driving the connecting shell 606 to move upward, sucking water close to the outer wall of the telescopic shell 601 into the telescopic shell 601, and at the same time pulling up the compression spring 603 to store power. When power is turned off, the movable core 602 moves downward under the force of gravity and the pulling force of the compression spring 603. When the movable core 602 moves downward, it pushes the connecting shell 606, and discharges the sucked water into the gap 202 through the water outlet 604, so that the melted water circulates between the ice cubes and the gap 202.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solenoid valve coil assembly, used in conjunction with a transport pipe (1), comprising a housing (2), a fixed iron core (3) and a magnetic ring (4), characterized in that: The invention also comprises a coil winding (5) and a moving iron core (6); an inner cavity (201) is provided inside the outer shell (2); the coil winding (5) is connected to the inner cavity (201); the moving iron core (6) comprises a telescopic shell (601), a movable core (602), a compression spring (603), a water outlet groove (604) and a water inlet groove (605); the telescopic shell (601) is connected to the lower end of the fixed iron core (3); and the lower end of the telescopic shell (601) is connected to a valve core (8); the movable core (602) is connected to the inside of the telescopic shell (601); the water outlet groove (604) is provided on both sides of the inner wall of the telescopic shell (601); the water inlet groove (605) is provided at the bottom end of the telescopic shell (601); the compression spring (603) is connected to the movable core (602); ) and the telescopic shell (601), there is a gap (202) between the telescopic shell (601) and the inner wall of the outer shell (2); when the telescopic shell (601) is not fixed, power is applied to cause the movable core (602) to move upward and engage with the fixed iron core (3), and the compression spring (603) is used to pull the telescopic shell (601) to contract, and at the same time drive the valve core (8) to move upward; when power is off, the telescopic shell (601) and the movable core (602) are reset; when the telescopic shell (601) is fixed, power is applied to cause the movable core (602) to move upward and engage with the fixed iron core (3), and at the same time water is sucked from the water inlet groove (605) into the telescopic shell (601), and the compression spring (603) is pulled up; when power is off, the compression spring (603) pulls the movable core (602) to move downward and discharges water from the water outlet groove (604).

2. The solenoid valve coil assembly according to claim 1, characterized in that: The moving iron core (6) further comprises a connecting shell (606), wherein the connecting shell (606) is connected to the lower end of the movable core (602), and the outer wall of the connecting shell (606) is connected to the telescopic shell (601).

3. The solenoid valve coil assembly according to claim 1, characterized in that: The cross section of the water outlet groove (604) is set to be Z-shaped, and the water outlet is located above the water inlet of the water inlet groove (605).

4. The solenoid valve coil assembly according to claim 1, characterized in that: A heat sink (9) is connected between the coil windings (5), the heat sink (9) is made of aluminum, the heat sink (9) is connected to the inner cavity (201), a circulation component (7) is connected inside the heat sink (9), and the circulation component (7) passes through the heat sink (9) and the fixed iron core (3) and extends into the transport pipe (1).

5. The solenoid valve coil assembly according to claim 4, characterized in that: The thickness of the coil winding (5) above the heat dissipation plate (9) is less than the thickness of the coil winding (5) below, and the length of the coil winding (5) above is equal to the length of the fixed iron core (3).

6. The solenoid valve coil assembly according to claim 4, characterized in that: The circulation component (7) comprises a spring tube (701), an air inlet pipe (702), an air outlet pipe (703) and a one-way pipe (704); the one-way pipe (704) is connected to the fixed iron core (3) and has two ends extending to the inside of the heat sink (9); the air inlet pipe (702) and the air outlet pipe (703) are respectively connected to the left and right sides of the one-way pipe (704); a diaphragm (101) is connected to the inside of the transport pipe (1); the spring tube (701) is connected above the diaphragm (101) and is in communication with the air inlet pipe (702) and the air outlet pipe (703); and the spring tube (701) is filled with nitrogen.

7. The solenoid valve coil assembly according to claim 6, characterized in that: The one-way tube (704) is made of elastic material, and an annular membrane (10) is connected inside the one-way tube (704). The cross section of the annular membrane (10) is set to be an isosceles trapezoid. The two annular membranes (10) are located on both sides of the one-way tube (704). The top of the movable core (602) is connected to a top column (607). The fixed iron core (3) is movably connected to a pressure plate (608). The top column (607) passes through the fixed iron core (3) and cooperates with the pressure plate (608).

8. The solenoid valve coil assembly according to claim 7, characterized in that: The air outlet pipe (703) and the air inlet pipe (702) extend to the outside, and have the same diameter as the spring pipe (701). The one-way pipe (704) has a smaller diameter than the air outlet pipe (703) and the air inlet pipe (702).

9. The solenoid valve coil assembly according to claim 7, characterized in that: The cross section of the water inlet groove (605) is set to be an inverted T shape, and the water outlet groove (604) and the water inlet groove (605) are both connected to an annular membrane (10).

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