An electromagnetic pump with pressure relief protection

Abstract

This invention relates to the field of electromagnetic pump technology, specifically to an electromagnetic pump with pressure relief protection. It includes an electromagnetic pump body and an inlet pipe and an outlet pipe mounted on the pump body. The outlet pipe is connected to a pressure relief tank, which is fixed to the base of the electromagnetic pump body. An auxiliary cylinder connected to the outlet pipe houses a power mechanism for detecting liquid flow. A temperature control mechanism, including a temperature control element and a flow guide, is located at the bottom of the power mechanism. Heat is conducted to the outlet pipe through a water supply pipe connected to one side of the water tank. After the ice blocking the outlet pipe melts, a drain pipe connects the other side of the water tank to the outlet pipe. The flow guide then guides the cold water in the outlet pipe back into the water tank for heating, thus achieving cyclic heating of the outlet pipe. This ensures normal water flow in the outlet pipe and prevents excessive pressure within the outlet pipe, which could cause internal damage.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic pumps, and in particular to an electromagnetic pump with pressure relief protection. Background Art

[0002] Electromagnetic pump is a pump that allows a current-carrying fluid in a magnetic field to flow in a certain direction under the action of electromagnetic force. It is a device that uses the interaction between the magnetic field and the current in the conductive fluid to cause the fluid to generate a pressure gradient under the action of electromagnetic force, thereby driving the fluid to move. In practice, it is mostly used to pump liquid metal, so it is also called liquid metal electromagnetic pump.

[0003] Electromagnetic pump is a device used to transport fluids, with the advantages of high efficiency, long life and easy control. In the field of irrigation, electromagnetic pumps can be used to achieve precise irrigation control and are suitable for a variety of irrigation systems.

[0004] In the prior art, in order to protect the electromagnetic pump, a pressure relief pipe is usually set on the discharge pipe of the electromagnetic pump. When the discharge pipe is blocked and the pressure inside it increases, the pressure relief pipe is used to recover part of the liquid into the pressure relief tank. When the resistance is eliminated, it is discharged into the discharge pipe by gravity. Although this method can play a certain role, for outdoor irrigation, the electromagnetic pump has a low outdoor ambient temperature and a small cross-sectional area of ​​the outlet of the electromagnetic pump discharge pipe. This makes it easy for the condensation speed of water to exceed the drainage speed, resulting in ice blocking the outlet and increasing the pressure in the pump body and the discharge liquid. Summary of the invention

[0005] The object of the present invention is to provide an electromagnetic pump with pressure relief protection to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the purpose of the present invention is to provide an electromagnetic pump with pressure relief protection, including an electromagnetic pump body and a water inlet pipe and a water outlet pipe arranged on the electromagnetic pump body, the water outlet pipe is connected to a pressure relief tank, the pressure relief tank is fixed on the base of the electromagnetic pump body, and a power mechanism for detecting liquid flow is arranged in an auxiliary cylinder connected to the water outlet pipe, and a temperature control mechanism is arranged at the bottom of the power mechanism, and the temperature control mechanism includes a temperature control part and a drainage part. When the rotation speed of the power mechanism gradually decreases, the power mechanism squeezes the temperature control part, and the temperature control part is used to heat the water inside the water tank at the bottom of the auxiliary cylinder, and the hot water is used to heat the ice cubes blocked at the water outlet of the water outlet pipe, and the drainage part transports the melted ice water in the water outlet pipe to the water tank, so as to realize the circulation heating of the water outlet pipe.

[0007] As a further improvement of the present technical solution, the power mechanism includes blades and a bevel gear set, the blades are located in a transfer tube connected to the water outlet pipe, and the bevel gear set is composed of a main bevel gear and a secondary bevel gear that mesh with each other, the main bevel gear is coaxially connected to the blades, the secondary bevel gear is fixedly connected to the rotating shaft, and the top end of the rotating shaft is rotatably connected to the inner wall of the auxiliary cylinder.

[0008] As a further improvement of the present technical solution, the power mechanism also includes multiple sliders, the support rod to which the sliders are slidably connected is fixedly connected to the rotating shaft, a return spring is sleeved on the support rod, the slider is fixedly connected to one end of the traction rope, the other end of the traction rope is fixedly connected to a counterweight block, and the counterweight block is slidably connected to the rotating shaft.

[0009] As a further improvement of the technical solution, an auxiliary plate is rotatably connected to the bottom of the counterweight block, both ends of the auxiliary plate slide in a slide groove opened in the water tank, and a conductive sheet is fixedly connected to the bottom of the auxiliary plate, and wiring terminals are provided at both ends of the conductive sheet.

[0010] As a further improvement of the present technical solution, the temperature control unit includes a heating block and a piezoelectric ceramic ring. The piezoelectric ceramic ring is arranged on the inner wall of the auxiliary cylinder, and the piezoelectric ceramic ring is located directly below the conductive sheet. The heating block is electrically connected to the piezoelectric ceramic ring, and the bottom of the conductive sheet is fixedly connected to an extrusion spring. Under normal conditions, the extrusion spring is in a released state.

[0011] As a further improvement of the technical solution, a water supply pipe is connected to one side of the water tank, and a drainage pipe is connected between the other side of the water tank and the water outlet pipe.

[0012] As a further improvement of the present technical solution, a partition provided in the water tank divides the water tank into an upper cavity and a lower cavity, and two sets of slide rails are symmetrically arranged on the inner wall of the heating block, and the baffle slidably connected to the slide rail is in contact with the heating block, and the memory spring fixedly connected to the top of the baffle is fixed to the bottom of the partition, and the baffles on both sides are used to block the water supply pipe and the drainage pipe, and the water supply pipe and the drainage pipe are connected to the lower cavity. At room temperature, the memory spring is in an elongated state, and is in a compressed state above room temperature.

[0013] As a further improvement of the technical solution, a shell is arranged near the water outlet pipe, and a lower impeller connected to the drain pipe is arranged in the shell, and the lower impeller is coaxially connected to the upper impeller at the top.

[0014] As a further improvement of the present technical solution, an air pipe is arranged on the side of the upper impeller away from the water outlet pipe, the end of the air pipe is connected to the upper cavity, and a pressure relief valve is arranged in the air pipe, and the water outlet pipe in the horizontal direction is on the path of the air flow ejected from the end of the air pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the electromagnetic pump with pressure relief protection, heat is transferred to the water outlet pipe through the water supply pipe connected to one side of the water tank. After the ice blocking the water outlet pipe melts, a drainage pipe is connected between the other side of the water tank and the water outlet pipe. The guide piece is used to guide the cold water in the water outlet pipe to the water tank for heating again, thereby realizing circulating heating of the water outlet pipe, ensuring the normal flow of water in the water outlet pipe, and preventing excessive pressure in the water outlet pipe, which may cause damage inside the water outlet pipe.

[0017] 2. In the electromagnetic pump with pressure relief protection, because the water outlet pipe in the horizontal direction is on the path of the air flow ejected from the end of the gas pipe, the air flow ejected from the end of the gas pipe can not only drive the upper impeller to rotate, but also use the ejected hot air flow to heat the outside of the water outlet pipe, thereby increasing the melting rate of ice inside the water outlet pipe and preventing the pressure in the water outlet pipe from being too high and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a right view of the electromagnetic pump body, pressure relief tank, auxiliary cylinder and water tank structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the cutaway structure of the water outlet pipe, the transfer pipe and the pressure relief tank of the present invention;

[0021] Figure 4 It is a schematic diagram of the cut-away internal structure of the water outlet pipe, the auxiliary cylinder and the water tank of the present invention;

[0022] Figure 5 It is a schematic diagram of the explosion structure of the counterweight block, the auxiliary plate and the piezoelectric ceramic ring of the present invention;

[0023] Figure 6 It is a schematic diagram of the explosion structure of the water tank, heating block, baffle and slide rail of the present invention;

[0024] Figure 7 It is a top view of the connection structure between the water tank and the water outlet pipe of the present invention;

[0025] Figure 8 It is a schematic diagram of the explosion structure of the upper impeller and the lower impeller of the present invention.

[0026] The meaning of each number in the figure is:

[0027] 100, electromagnetic pump body; 110, water inlet pipe; 120, water outlet pipe; 121, transfer pipe;

[0028] 130. Pressure relief tank;

[0029] 150, auxiliary cylinder; 160, water tank; 161, gas pipe;

[0030] 170, conductive sheet; 171, terminal block; 172, auxiliary plate; 173, extrusion spring;

[0031] 180, baffle; 181, memory spring; 182, slide rail;

[0032] 190, lower impeller; 191, upper impeller; 192, casing;

[0033] 200, power mechanism; 210, blades; 220, bevel gear set;

[0034] 230, slider; 231, traction rope; 232, counterweight; 233, return spring;

[0035] 300, temperature control mechanism; 310, heating block; 311, partition; 320, piezoelectric ceramic ring. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. 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 creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0038] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. Example

[0039] like Figure 1-Figure 4As shown, an electromagnetic pump with pressure relief protection is provided, including an electromagnetic pump body 100 and a water inlet pipe 110 and a water outlet pipe 120 arranged on the electromagnetic pump body 100, the water outlet pipe 120 is connected to a pressure relief tank 130, the pressure relief tank 130 is fixed on the base of the electromagnetic pump body 100, and a power mechanism 200 for detecting liquid flow is arranged in an auxiliary cylinder 150 connected to the water outlet pipe 120. When the speed of the power mechanism 200 gradually decreases, a temperature control mechanism 300 is arranged at the bottom of the power mechanism 200, and the temperature control mechanism 300 includes a temperature control unit and a drainage unit. The power mechanism 200 squeezes the temperature control unit. The temperature control unit is used to heat the water inside the water tank 160 at the bottom of the auxiliary cylinder 150. The hot water is used to heat the ice cubes blocked at the outlet of the water outlet pipe 120. The drainage unit transports the melted ice water in the water outlet pipe 120 to the water tank 160, thereby realizing cyclic heating of the water outlet pipe 120 and preventing the liquid in the water outlet pipe 120 from being frozen, resulting in an increase in the pressure inside the electromagnetic pump body 100 and causing internal damage.

[0040] The reason why the water outlet pipe 120 is blocked is that since the water outlet cross-section of the water outlet pipe 120 is small, the condensation speed of water exceeds the drainage speed, which easily causes ice to block the water outlet.

[0041] Therefore, when the water outlet pipe 120 is frozen, the water flow rate in the water outlet pipe 120 decreases, the rotation speed of the power mechanism 200 decreases, and the pressure of the power mechanism 200 on the temperature control mechanism 300 increases. Then, the temperature control unit heats the liquid in the water tank 160, and uses the heated water to melt the ice blocking the water outlet pipe 120. The melted water in the water outlet pipe 120 is circulated and heated in cooperation with the drainage piece, thereby realizing circulating heating of the water outlet pipe 120.

[0042] First, when the water flow rate in the water outlet pipe 120 decreases, a part of the water flow in the water outlet pipe 120 flows into the pressure relief tank 130 for storage. After the water outlet of the water outlet pipe 120 is unblocked, the water in the pressure relief tank 130 flows back to the water outlet pipe 120 under the action of gravity. If the water outlet pipe 120 is always in a blocked state, during this process, the water level in the pressure relief tank 130 gradually increases until the pressure relief tank 130 is filled. When the pressure relief tank 130 is filled, an alarm device can be set to remind (this is the prior art). At the same time, the temperature control unit heats the liquid in the water tank 160 and conducts heat to the water outlet pipe 120. This process is synchronized with the increase of the water level in the pressure relief tank 130.

[0043] To this end, based on the above structure, first Figure 4The structure of the power mechanism 200 is further disclosed. The power mechanism 200 includes a blade 210 and a bevel gear set 220. The blade 210 is located in a transfer tube 121 connected to the water outlet pipe 120. The bevel gear set 220 is composed of a main bevel gear and a secondary bevel gear that mesh with each other. The main bevel gear is coaxially connected to the blade 210, and the secondary bevel gear is fixedly connected to the rotating shaft. The top end of the rotating shaft is rotatably connected to the inner wall of the auxiliary cylinder 150. In this way, when the water flow velocity in the water outlet pipe 120 decreases, the blade 210 is affected by the water flow and its rotation speed is also reduced.

[0044] On the other hand, combined Figure 5 As shown, the power mechanism 200 also includes a plurality of sliders 230, the support rod to which the sliders 230 are slidably connected is fixedly connected to the rotating shaft, a return spring 233 is sleeved on the support rod, the slider 230 is fixedly connected to one end of a traction rope 231, the other end of the traction rope 231 is fixedly connected to a counterweight 232, and the counterweight 232 is slidably connected to the rotating shaft. In this way, when the water flow is flowing normally, under the influence of centrifugal force, the plurality of sliders 230 slide outward on the support rod respectively, and the slider 230 squeezes the return spring 233, so that the elastic potential energy of the return spring 233 increases. At the same time, the slider 230 pulls the traction rope 231 to make the counterweight 232 slide on the rotating shaft, and the counterweight 232 slides upward. On the contrary, if the water flow velocity decreases, the slider 230 is reduced under the influence of centrifugal force, and under the elastic action of the return spring 233, the slider 230 slides inward to release the traction rope 231, thereby reducing the height of the counterweight 232.

[0045] It should be noted that the slider 230 mentioned above slides outward and inward, wherein sliding outward means that the slider 230 slides in a direction away from the rotation axis, and conversely, sliding in a direction close to the rotation axis is sliding inward.

[0046] Then, return to Figure 4 Combined with Figure 5 As shown, in order to melt the ice blocks in the water outlet pipe 120 by heating the water in the water tank 160 when the water flow velocity in the water outlet pipe 120 decreases, thereby preventing the pressure in the water outlet pipe 120 from increasing, an auxiliary plate 172 is rotatably connected to the bottom of the counterweight 232, and both ends of the auxiliary plate 172 slide in the slide grooves provided in the water tank 160, and a conductive sheet 170 is fixedly connected to the bottom of the auxiliary plate 172, and both ends of the conductive sheet 170 are provided with wiring terminals 171 (the wiring terminal 171 on one side is connected to the live wire of the pump body through a wire, and the wire connected to the wiring terminal 171 on the other side is led out and connected to the plug in conjunction with the neutral wire of the pump body, that is, the conductive sheet 170 at this time acts as a switch). Among them, when the counterweight 232 moves upward, the counterweight 232 will drive the auxiliary plate 172 to move upward. At this time, the wiring terminals 171 on both sides are connected under the action of the conductive sheet 170, and the pump body works normally.

[0047] The process of heating the cold water in the water tank 160 is as follows:

[0048] The temperature control unit includes a heating block 310 and a piezoelectric ceramic ring 320. The piezoelectric ceramic ring 320 is disposed on the inner wall of the auxiliary tube 150 and is located directly below the conductive sheet 170. The heating block 310 is electrically connected to the piezoelectric ceramic ring 320. The bottom of the conductive sheet 170 is fixedly connected to the extrusion spring 173. Under normal conditions, the extrusion spring 173 is in a released state. Therefore, when the flow rate of the water flow decreases (i.e., the conductive sheet 170 is still in contact with the two-side terminals 171 at this time), the extrusion spring 173 is squeezed by the weight block 232, the auxiliary plate 172 and the conductive sheet 170's own gravity, so that the extrusion spring 173 squeezes the piezoelectric ceramic ring 320. The piezoelectric ceramic ring 320 is charged under the pressure, and then the electrically connected heating block 310 is used to heat the water in the water tank 160. At this time, combined with the Figure 7 As shown, heat is conducted to the water outlet pipe 120 through the water supply pipe connected to one side of the water tank 160. After the ice blocking the water outlet pipe 120 melts, since a drainage pipe is connected between the other side of the water tank 160 and the water outlet pipe 120, the guide member is used to guide the cold water in the water outlet pipe 120 to the water tank 160 for heating again, thereby realizing circulating heating of the water outlet pipe 120, ensuring the normal flow of water in the water outlet pipe 120, and preventing excessive pressure in the water outlet pipe 120 from causing damage thereto.

[0049] It should be noted that: when the water flow in the water outlet pipe 120 is normal, the piezoelectric ceramic ring 320 is not squeezed. When the hydraulic flow rate decreases, the rotation speed of the rotating shaft decreases. At this time, the height of the counterweight block 232, the conductive sheet 170, the auxiliary plate 172 and the squeezing spring 173 is reduced, and the piezoelectric ceramic ring 320 is squeezed by gravity.

[0050] Furthermore, considering that when the water flow rate decreases, since the water tank 160 and the water outlet pipe 120 are connected through the water supply pipe and the drain pipe, the water in the water outlet pipe 120 will flow into the water supply pipe and the drain pipe, thereby filling the entire water tank 160. Figure 7 Based on and combined with Figure 6As shown, the partition 311 provided in the water tank 160 divides the water tank 160 into an upper cavity and a lower cavity (the upper cavity refers to the top of the partition 311, and the lower cavity refers to the bottom of the partition 311), and two sets of slide rails 182 are symmetrically arranged on the inner wall of the heating resistance block 310. The baffle 180 slidably connected to the slide rail 182 is in contact with the heating resistance block 310, and the memory spring 181 fixedly connected to the top of the baffle 180 is fixed to the bottom of the baffle 311, and the baffles 180 on both sides are used to block the water supply pipe and the drainage pipe, and the water supply pipe and the drainage pipe are connected to the lower cavity. At room temperature, the memory spring 181 is in an elongated state, and is in a compressed state above room temperature.

[0051] In this way, combined with Figure 5 and Figure 6 As shown, when the piezoelectric ceramic ring 320 is not squeezed, the heating block 310 does not heat the water in the water tank 160. At this time, the length of the memory spring 181 remains unchanged, and the baffles 180 on both sides block the water supply pipe and the drainage pipe respectively, thereby preventing the water flow in the water outlet pipe 120 from entering the water tank 160.

[0052] Secondly, when the heating block 310 is heated, the memory spring 181 pulls the baffle 180 to move upward. At this time, the water tank 160 and the water outlet pipe 120 are in a connected state. The hot water in the water tank 160 is used to heat the water outlet pipe 120, so that the ice in the water outlet pipe 120 gradually melts, preventing the water outlet pipe 120 from being blocked for a long time, causing its internal pressure to increase, which may easily cause damage to the internal part of the pump body.

[0053] In order to realize the circulation heating of the ice cubes inside the water outlet pipe 120, Figure 7 Based on and combined with Figure 8 As shown, a housing 192 is provided near the water outlet pipe 120, a lower impeller 190 connected to the drain pipe is provided in the housing 192, the lower impeller 190 is coaxially connected to the upper impeller 191 at the top, an air pipe 161 is provided on the side of the upper impeller 191 away from the water outlet pipe 120, the end of the air pipe 161 is connected to the upper cavity, and a pressure relief valve is provided in the air pipe 161. In this way, during the heating process in the water tank 160, hot air will also be generated in the upper cavity, when the hot air breaks through the pressure relief valve, the pressure relief valve opens instantly, and the hot air is ejected from the end of the air pipe 161 to drive the upper impeller 191 to rotate, at the same time, the lower impeller 190 rotates to transport the melted cold water in the water outlet pipe 120 to the water tank 160, and then heats it again, and the cycle is repeated, so as to realize the cyclic heating of the ice blocked in the water outlet pipe 120.

[0054] Because the water outlet pipe 120 in the horizontal direction is on the path of the air flow ejected from the end of the gas pipe 161, the air flow ejected from the end of the gas pipe 161 can not only drive the upper impeller 191 to rotate, but also use the ejected hot air flow to heat the outside of the water outlet pipe 120, thereby increasing the melting rate of ice cubes inside the water outlet pipe 120 and preventing the pressure in the water outlet pipe 120 from being too high and affecting its use.

[0055] When the water outlet pipe 120 is unblocked, the conductive sheet 170 is now tightly attached to the connecting terminals 171 on both sides, the pump body resumes normal operation, and the heating in the water tank 160 stops.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electromagnetic pump with pressure relief protection, comprising an electromagnetic pump body (100) and a water inlet pipe (110) and a water outlet pipe (120) arranged on the electromagnetic pump body (100), the water outlet pipe (120) being connected to a pressure relief tank (130), the pressure relief tank (130) being fixed on a base of the electromagnetic pump body (100), characterized in that: A power mechanism (200) for detecting liquid flow is arranged in the auxiliary cylinder (150) connected to the water outlet pipe (120), and a temperature control mechanism (300) is arranged at the bottom of the power mechanism (200). The temperature control mechanism (300) comprises a temperature control part and a drainage piece. When the rotation speed of the power mechanism (200) gradually decreases, the power mechanism (200) squeezes the temperature control part. The temperature control part is used to heat the water inside the water tank (160) at the bottom of the auxiliary cylinder (150). The hot water is used to heat the ice blocks blocking the water outlet of the water outlet pipe (120). The drainage piece transports the melted ice water in the water outlet pipe (120) to the water tank (160), thereby realizing cyclic heating of the water outlet pipe (120); The power mechanism (200) comprises a blade (210) and a bevel gear set (220); the blade (210) is located in a transfer tube (121) connected to the water outlet pipe (120); the bevel gear set (220) is composed of a main bevel gear and a secondary bevel gear meshing with each other; the main bevel gear is coaxially connected to the blade (210); the secondary bevel gear is fixedly connected to a rotating shaft; and the top end of the rotating shaft is rotatably connected to the inner wall of the auxiliary cylinder (150); The power mechanism (200) further comprises a plurality of sliders (230), wherein a support rod slidably connected to the sliders (230) is fixedly connected to the rotating shaft, a return spring (233) is sleeved on the support rod, the slider (230) is fixedly connected to one end of a traction rope (231), the other end of the traction rope (231) is fixedly connected to a counterweight (232), and the counterweight (232) is slidably connected to the rotating shaft; An auxiliary plate (172) is rotatably connected to the bottom of the counterweight (232), two ends of the auxiliary plate (172) slide in slide grooves provided in the water tank (160), and a conductive sheet (170) is fixedly connected to the bottom of the auxiliary plate (172), and two ends of the conductive sheet (170) are provided with connection terminals (171); The temperature control unit comprises a heating resistance block (310) and a piezoelectric ceramic ring (320); the piezoelectric ceramic ring (320) is arranged on the inner wall of the auxiliary cylinder (150), and the piezoelectric ceramic ring (320) is located directly below the conductive sheet (170); the heating resistance block (310) is electrically connected to the piezoelectric ceramic ring (320); the bottom of the conductive sheet (170) is fixedly connected to a compression spring (173); under normal conditions, the compression spring (173) is in a released state.

2. The electromagnetic pump with pressure relief protection according to claim 1, characterized in that: One side of the water tank (160) is connected to a water supply pipe, and the other side of the water tank (160) is connected to a water discharge pipe (120).

3. The electromagnetic pump with pressure relief protection according to claim 2, characterized in that: A partition (311) provided in the water tank (160) divides the water tank (160) into an upper cavity and a lower cavity. Two sets of slide rails (182) are symmetrically provided on the inner wall of the heating resistance block (310). The baffle (180) slidably connected to the slide rail (182) fits in contact with the heating resistance block (310). A memory spring (181) fixedly connected to the top of the baffle (180) is fixed to the bottom of the partition (311). The baffles (180) on both sides are used to block a water supply pipe and a drainage pipe. The water supply pipe and the drainage pipe are connected to the lower cavity. At room temperature, the memory spring (181) is in an elongated state, and above room temperature, it is in a compressed state.

4. The electromagnetic pump with pressure relief protection according to claim 3 is characterized in that: A housing (192) is provided near the water outlet pipe (120), a lower impeller (190) connected to the water outlet pipe is provided in the housing (192), and the lower impeller (190) is coaxially connected to the upper impeller (191) at the top.

5. The electromagnetic pump with pressure relief protection according to claim 4, characterized in that: An air delivery pipe (161) is arranged on the side of the upper impeller (191) away from the water outlet pipe (120); the end of the air delivery pipe (161) is connected to the upper cavity, and a pressure relief valve is arranged in the air delivery pipe (161); the water outlet pipe (120) in the horizontal direction is on the path of the air flow ejected from the end of the air delivery pipe (161).

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