An overheating power-off protection structure, an explosion-proof electric heater and a method for heating a fluid thereof

Abstract

The present invention relates to the technical field of power-off protection, and specifically to an overheating power-off protection structure, an explosion-proof electric heater and a method for heating a fluid thereof, comprising: a heater box, and a partition plate installed in the heater box, a heat-conducting tank penetrating the heater box is arranged on the partition plate, a cooling tank is arranged on the top of the heater box; a temperature-rising follow-up mechanism is arranged in the heat-conducting tank, a conduction regulating component connected to the cooling tank is also arranged in the heat-conducting tank, a conveying pipe connected to the cooling tank is connected to the conduction regulating component; a power-off protection component is arranged on the heat-conducting tank and connected to the temperature-rising follow-up mechanism, and can adjust the connection state of the circuit in the heater box when the temperature-rising follow-up mechanism moves. The present application can automatically cut off the power supply to the equipment when the temperature is too high, and perform cooling treatment through coolant to ensure the safety of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of power-off protection, in particular to an overheating power-off protection structure, an explosion-proof electric heater and a method for heating a fluid thereof. Background Art

[0002] Explosion-proof electric heater is a device used in explosion-proof places to convert electricity into heat energy. It is used to increase the temperature, keep warm and heat the flowing or stationary liquid, gaseous and solid media.

[0003] During heating, if the heating element is overheated, the independent overheat protection device of the heating element will immediately cut off the heating power supply to prevent the heated material from overheating and causing coking, deterioration, and carbonization, which may cause the heating element to burn out in severe cases, effectively extending the service life of the electric heater.

[0004] However, existing overheat protection devices generally control the circuit disconnection through high-temperature hot melt or heat-sensitive materials. After disconnection, the circuit needs to be manually connected, and the heater cannot be cooled, which may still lead to the problem of reduced heater service life. Summary of the invention

[0005] The object of the present invention is to provide an overheating power-off protection structure, an explosion-proof electric heater and a method for heating a fluid thereof, so as to solve the problems raised in the above-mentioned background technology.

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

[0007] An overheating power-off protection structure, comprising:

[0008] A heater box, and a partition plate installed in the heater box, a heat conduction tank penetrating the heater box is arranged on the partition plate, and a cooling tank is arranged on the top of the heater box;

[0009] Also includes:

[0010] A temperature-rising follow-up mechanism is arranged in the heat-conducting tank, and a conduction regulating component connected to the cooling tank is also arranged in the heat-conducting tank, and a delivery pipe connected to the cooling tank is connected to the conduction regulating component. The temperature-rising follow-up mechanism can be actuated when the temperature in the heat-conducting tank changes, and the conduction state of the cooling tank is adjusted by the conduction regulating component, so that the coolant in the cooling tank is delivered to the delivery pipe;

[0011] A power-off protection component is arranged on the heat-conducting tank and connected to the temperature-rising follow-up mechanism, and can adjust the connection state of the circuit in the heater box when the temperature-rising follow-up mechanism moves.

[0012] As a further solution of the present invention: the temperature rising follow-up mechanism includes a rotating rod rotatably installed in the heat-conducting tank and passing through the heat-conducting tank, symmetrically arranged guide columns are provided in the heat-conducting tank, and a sealing disk and a movable plate slidably connected to the rotating rod are slidably installed on the guide columns, and a guide assembly connected to the sealing disk is provided in the heat-conducting tank.

[0013] As a further solution of the present invention: the guide assembly includes a guide groove provided on the outer wall of the rotating rod, and the inner wall of the sealing disk is provided with a first limit block slidably connected with the guide groove;

[0014] It also includes a first spring and a second spring sleeved on the rotating rod, wherein two ends of the first spring respectively abut against the sealing disk and the movable plate, and two ends of the second spring respectively abut against the movable plate and the inner wall of the heat conduction tank.

[0015] As a further solution of the present invention: the conduction regulating component includes a spiral groove provided on the rotating rod, the inner wall of the movable plate is provided with a second limit block slidably connected with the spiral groove, and the end of the rotating rod is provided with a conduction hole, and the conduction hole cooperates with the conveying pipe;

[0016] It also includes a hollow tube installed at the bottom of the cooling tank, the hollow tube is slidably fitted with the rotating rod and connected with the conveying pipe.

[0017] As a further solution of the present invention: the power-off protection component includes a rotating plate installed on the rotating rod, and a first moving contact and a second moving contact are provided on the rotating plate. A first static contact and a second static contact are provided on the top of the heat-conducting tank, and the first static contact is in contact with the first moving contact, and the second static contact is in contact with the second moving contact.

[0018] An explosion-proof electric heater, comprising:

[0019] A resistance heater is installed in the heater box, a transfer tank is also arranged in the heater box, and a discharge pipe is connected to the outer wall of the transfer tank;

[0020] A circulating heating component, disposed on the heater housing and connected to the transfer tank, for circulating the oil in the heater housing;

[0021] The temperature control switching mechanism is arranged in the transfer tank, and the temperature control switching mechanism can switch the conduction state of the circulation heating component and the discharge pipe when the temperature in the transfer tank changes.

[0022] As a further solution of the present invention: the circulating heating assembly comprises a circulating pump installed on the side wall of the heater box, the circulating pump is connected to an absorption pipe and a return pipe, and the return pipe is connected to the transfer tank;

[0023] It also includes a guide pipe installed on the side wall of the transfer tank and connected to the transfer tank.

[0024] As a further solution of the present invention: the temperature control switching mechanism includes a fixed sleeve installed on the side wall of the transfer tank and arranged symmetrically, a limiting rod penetrating the transfer tank is slidably installed in the fixed sleeve, a fourth spring abutting against the limiting rod is arranged in the fixed sleeve, and a driven component connected to the limiting rod is arranged in the transfer tank.

[0025] As a further solution of the present invention: the driven assembly comprises a support rod installed in the transfer tank, a movable disk is slidably installed on the support rod, an inclined ring is arranged at the end of the movable disk, the inclined ring is in abutment with the limit rod, and a conveying hole is opened on the outer circumference of the inclined ring to cooperate with the discharge pipe;

[0026] It also includes a third spring which is sleeved on the support rod and abuts against the movable disk.

[0027] A method for heating a fluid using an explosion-proof electric heater, comprising the following steps:

[0028] Step 1: When heating the oil in the heater box, the resistance heater can be controlled to work to heat the oil;

[0029] Step 2: At the same time, the circulating heating component works and circulates the oil in the heater box, thereby increasing the fluidity of the oil to speed up the heating rate of the oil;

[0030] Step 3: As the oil temperature rises, the temperature in the transfer tank gradually increases, causing the pressure in the transfer tank to increase. Under the action of air pressure, the temperature control switching mechanism is driven to move;

[0031] Step 4: When the oil is heated to the required temperature, the temperature switching mechanism will quickly control the circulating heating component to stop circulating the oil and control the discharge pipe to be connected to transport the heated oil to the required location.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can monitor the temperature in the heater box at all times, and when the temperature in the heater box is too high, it can be powered off to protect it, so as to prevent the problem that the temperature in the heater box is too high, which leads to increased risks of use. When the oil in the heater box is heated, the temperature in the heat conduction tank will also increase, causing the gas in the heat conduction tank to expand, and under the action of the air pressure, the temperature rise follower mechanism is driven to move. At normal temperature, the stroke of the temperature rise follower mechanism is small. If the temperature is too high, under the action of the temperature rise follower mechanism, the delivery pipe is controlled to be conductive through the conduction regulating component to transport the coolant in the cooling tank to the delivery pipe. Under the action of the coolant, the heater box is cooled. At the same time, the temperature rise follower mechanism will also drive the power-off protection component to move, so that the circuit in the heater box is disconnected. After the temperature cools down, under the action of the temperature rise follower mechanism and the conduction regulating component, the power-off protection component is reset to control the circuit in the heater box to be connected again, thereby achieving the effect of automatically controlling the circuit disconnection according to the temperature in the heater box. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The present invention is a structural schematic diagram of an embodiment of an overheat power-off protection structure and an explosion-proof electric heater.

[0034] Figure 2 This is a structural schematic diagram from another angle in an embodiment of an overheat power-off protection structure and an explosion-proof electric heater.

[0035] Figure 3 This is a schematic diagram of the half-section structure of a heater box in an embodiment of an overheat power-off protection structure and an explosion-proof electric heater.

[0036] Figure 4 It is a schematic diagram of the cross-sectional structure of a transfer tank in one embodiment of an overheat power-off protection structure and an explosion-proof electric heater.

[0037] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at point A in the middle.

[0038] Figure 6 It is a schematic diagram of the explosion structure of the temperature control switching mechanism in an embodiment of an overheat power-off protection structure and an explosion-proof electric heater.

[0039] Figure 7 It is a structural schematic diagram of a power-off protection component and a partial conduction control component in an embodiment of an overheat power-off protection structure and an explosion-proof electric heater.

[0040] Figure 8 It is a schematic diagram of the half-section structure of a heat-conducting tank in an embodiment of an overheating power-off protection structure and an explosion-proof electric heater.

[0041] Fig. 9This is a schematic diagram of the connection relationship between an overheat power-off protection structure and a temperature-rising follow-up mechanism and a partial conduction control component in one embodiment of an explosion-proof electric heater.

[0042] Fig.10 It is a schematic diagram of the explosion structure of an overheating power-off protection structure, a temperature-rising follow-up mechanism, and a partially conductive control component in one embodiment of an explosion-proof electric heater.

[0043] Fig.11 for Fig.10 A magnified schematic diagram of the structure at point B in the middle.

[0044] Fig.12 It is a schematic structural diagram of an overheating power-off protection structure, a power-off protection component, and a heat-conducting tank in one embodiment of an explosion-proof electric heater.

[0045] In the figure: 1, heater housing; 2, partition plate; 3, cooling tank; 4, heat conduction tank; 5, rotating rod; 501, first vertical groove; 502, first annular groove; 503, second vertical groove; 504, second annular groove; 505, spiral groove; 6, sealing plate; 601, first limit block; 7, guide column; 8, first spring; 9, movable plate; 901, second limit block; 10, second spring; 11, conduction hole; 12, rotating plate; 1201, first movable contact Head; 1202, second moving contact; 13, first static contact; 14, second static contact; 15, hollow tube; 16, delivery tube; 17, resistance heater; 18, circulation pump; 19, absorption tube; 20, reflux tube; 21, transfer tank; 22, guide tube; 23, support rod; 24, movable disk; 2401, tilting ring; 25, delivery hole; 26, third spring; 27, discharge pipe; 28, fixed sleeve; 29, limit rod; 30, fourth spring. DETAILED DESCRIPTION

[0046] 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. 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.

[0047] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0048] See also Figure 1 to Figure 12 In the embodiment of the present invention, an overheating power-off protection structure includes: a heater box 1, a partition plate 2, a cooling tank 3, a heat-conducting tank 4, a temperature-rising follow-up mechanism, a conduction regulating component, a delivery pipe 16, and a power-off protection component. In order to prevent the temperature in the heater box 1 from being too high, which increases the risk of use, it is necessary to monitor the temperature in the heater box 1 at all times and perform power-off protection on it. Therefore, when the oil in the heater box 1 is heated, the temperature in the heat-conducting tank 4 will also increase, causing the gas in the heat-conducting tank 4 to expand. Under the action of the gas pressure, the temperature-rising follow-up mechanism is driven to move. At normal temperature, the stroke of the temperature-rising follow-up mechanism is The amount is small. If the temperature is too high, under the action of the temperature rising follow-up mechanism, the conduction and regulation component controls the delivery pipe 16 to be conducted, so that the coolant in the cooling tank 3 is delivered to the delivery pipe 16. Under the action of the coolant, the heater box 1 is cooled. At the same time, the temperature rising follow-up mechanism will also drive the power-off protection component to move, so that the circuit in the heater box 1 is disconnected. After the temperature cools down, under the action of the temperature rising follow-up mechanism and the conduction and regulation component, the power-off protection component is reset to control the circuit in the heater box 1 to be connected again, thereby achieving the effect of automatically controlling the circuit disconnection according to the temperature in the heater box 1.

[0049] The details are as follows, including:

[0050] A heater box 1, and a partition plate 2 installed in the heater box 1, a heat-conducting tank 4 penetrating the heater box 1 is arranged on the partition plate 2, and a cooling tank 3 is arranged on the top of the heater box 1;

[0051] Also includes:

[0052] See also Figure 1-Figure 3 , Figure 7-Figure 11 , a temperature rising follow-up mechanism is arranged in the heat-conducting tank 4, and the temperature rising follow-up mechanism includes a rotating rod 5 rotatably installed in the heat-conducting tank 4 and passing through the heat-conducting tank 4, and a symmetrically arranged guide column 7 is arranged in the heat-conducting tank 4, and a sealing disk 6 and a movable plate 9 slidably connected to the rotating rod 5 are slidably installed on the guide column 7, and a guide component connected to the sealing disk 6 is arranged in the heat-conducting tank 4, wherein the guide component includes a guide groove opened on the outer wall of the rotating rod 5, and a first limit block 601 slidably connected to the guide groove is arranged on the inner wall of the sealing disk 6; it also includes a first spring 8 and a second spring 10 sleeved on the rotating rod 5, and the two ends of the first spring 8 are respectively abutted against the sealing disk 6 and the movable plate 9, and the two ends of the second spring 10 are respectively abutted against the movable plate 9 and the inner wall of the heat-conducting tank 4.

[0053] In detail, the heater housing 1 is filled with oil required for heating, and the guide groove can be divided into four sections, namely the first vertical groove 501, the first annular groove 502, the second vertical groove 503, and the second annular groove 504, and the first vertical groove 501, the first annular groove 502, the second vertical groove 503, and the second annular groove 504 are connected to each other in sequence, and the sealing plate 6 is slidably sealed and connected with the heat-conducting tank 4, and the heat-conducting tank 4 is divided into two spaces, and the space located on the side of the sealing plate 6 away from the movable plate 9 is filled with expansion gas, and the expansion coefficient of the gas is greater than the expansion coefficient of air. The space on the side of the sealing disk 6 facing the movable plate 9 is connected to the outside air. In the initial state, the temperature in the heater box 1 is consistent with the room temperature, and the expanding gas will not expand. The first spring 8 and the second spring 10 are both in a compressed state, and the elastic potential energy of the second spring 10 is greater than the elastic potential energy of the first spring 8, so that the movable plate 9 and the sealing disk 6 are both located at the end of the stroke toward the bottom of the heat transfer tank 4. At this time, the first limit block 601 is located at the connection position between the first vertical groove 501 and the second annular groove 504, and the delivery pipe 16 is in a blocked state.

[0054] Specifically, if it is necessary to heat the oil, at this time, the circuit in the heater box 1 is connected, and the oil is heated. As the temperature rises, since the heat-conducting tank 4 is made of a heat-conducting material, the heat will be transferred into the heat-conducting tank 4, causing the expanding gas to expand due to the heat, so as to increase the air pressure in the heat-conducting tank 4. The air pressure will act on the sealing disk 6 and push the sealing disk 6 to move along the length direction of the guide column 7. The guide column 7 has a guiding function to ensure that the sealing disk 6 does not rotate. The sealing disk 6 will also drive the first limit block 601 to slide along the first vertical groove 501 and compress the first spring 8. Since the first limit block 601 and the first vertical groove 501 also have a guiding function to ensure that the rotating rod 5 does not rotate, therefore, under the action of the conduction regulating component, the position of the movable plate 9 will not change. If the oil is heated to a normal temperature range, the first limit block 601 will always be located in the first vertical groove 501. At this time, the heater box 1 The circuit inside always remains connected. If the oil heating temperature is too high, it means that the circuit module controlling the heating may be damaged and the circuit needs to be powered off. At this time, under the action of air pressure, the first limit block 601 will move to the connection position of the first vertical groove 501 and the first annular groove 502. The elastic potential energy of the first spring 8 will be much greater than the elastic potential energy of the second spring 10, and the first limit block 601 and the first vertical groove 501 no longer lock the rotating rod 5. The first spring 8 is elastically released and drives the movable plate 9 to move, thereby compressing the second spring 10. At the same time, the movable plate 9 will also drive the conduction and regulation component to move, thereby controlling the rotating rod 5 to rotate a certain angle, so that the delivery pipe 16 is turned on, so as to deliver the coolant in the cooling tank 3 to the delivery pipe 16, thereby cooling the heater box 1. At this time, the first limit block 601 just moves to the connection position of the first annular groove 502 and the second vertical groove 503.

[0055] Preferably, when the rotating rod 5 rotates, it will also drive the power-off protection component to move, so that the circuit in the heater box 1 is disconnected. With the circulation of the coolant in the delivery pipe 16, the temperature in the heater box 1 gradually decreases, the expanded gas gradually contracts, the first spring 8 is elastically released, and drives the sealing disk 6 to move toward the initial position, so that the first limit block 601 moves along the length direction of the second vertical groove 503, and limits the rotation of the rotating rod 5 again. When the temperature cools to room temperature, the sealing disk 6 returns to the initial position, and the first limit block 601 is located at the connection position between the second vertical groove 503 and the second annular groove 504. At this time, the elastic potential energy of the second spring 10 is again greater than the elastic release of the first spring 8, the second spring 10 is elastically released, and drives the movable plate 9 to reset, thereby controlling the rotating rod 5 to rotate to the initial angle through the conduction control component, so that the first limit block 601 returns to the connection position between the second annular groove 504 and the first vertical groove 501 again. At this time, the delivery pipe 16 is in a blocked state again, and under the action of the rotating rod 5, the circuit in the heater box 1 is connected again.

[0056] See also Figure 1-Figure 3 , Figure 7-10 , the heat-conducting tank 4 is also provided with a conduction regulating component connected to the cooling tank 3, and the conduction regulating component is connected to a delivery pipe 16 connected to the cooling tank 3. The temperature rise follow-up mechanism can be actuated when the temperature in the heat-conducting tank 4 changes, and the conduction state of the cooling tank 3 is adjusted by the conduction regulating component, so that the coolant in the cooling tank 3 is delivered to the delivery pipe 16. The conduction regulating component includes a spiral groove 505 provided on the rotating rod 5, and a second limit block 901 slidably connected to the spiral groove 505 is provided on the inner wall of the movable plate 9. A conduction hole 11 is provided at the end of the rotating rod 5, and the conduction hole 11 cooperates with the delivery pipe 16; it also includes a hollow tube 15 installed at the bottom of the cooling tank 3, and the hollow tube 15 is slidably fitted with the rotating rod 5 and connected to the delivery pipe 16.

[0057] It should be noted that a pump body can be installed on the top of the cooling tank 3 to circulate the coolant in the cooling tank 3 through the delivery pipe 16. In the initial state, the temperature in the heater box 1 is consistent with the room temperature. Under the action of the first spring 8 and the second spring 10, the movable plate 9 and the sealing disk 6 are at the end of the stroke toward the bottom of the heat transfer tank 4, so that the second limit block 901 is located at the end of the stroke on one side of the spiral groove 505, the conducting hole 11 and the delivery pipe 16 are in a separated state, so that the delivery pipe 16 is in a blocked state. As the temperature increases, the first limit block 601 will slide along the first vertical groove 501. At this time, the rotating rod 5 will not rotate. If the temperature is too high, when the first limit block 601 moves to the connection position of the first vertical groove 501 and the first annular groove 502, under the action of the first spring 8, the movable plate 9 moves in the direction away from the sealing disk 6 and presses the second spring 8. When the spring 10 is compressed, the movable plate 9 will also drive the second limit block 901 to slide in the spiral groove 505, so that the rotating rod 5 rotates, and the rotating rod 5 will also drive the conducting hole 11 to move. When the second limit block 901 moves to the end of the stroke on the other side of the spiral groove 505, the first limit block 601 just moves to the connection position of the first annular groove 502 and the second vertical groove 503, the rotation angle of the rotating rod 5 reaches the maximum, and the conducting hole 11 moves to the connection position with the delivery pipe 16. At the same time, the rotating rod 5 will also drive the power-off protection component to move, so that the pump body works to pump the coolant in the cooling tank 3 into the delivery pipe 16. Since the delivery pipe 16 passes through the heater box 1 and the other end is connected to the cooling tank 3, the coolant will flow back into the cooling tank 3 after being heated in the hand washing heater box 1, thereby automatically cooling the heater box 1 when the temperature is too high.

[0058] See also Figure 1-Figure 3 , Figure 7 , Fig.12 , a power-off protection component is arranged on the heat-conducting tank 4 and connected to the temperature-rising follow-up mechanism, and can adjust the connection state of the circuit in the heater box 1 when the temperature-rising follow-up mechanism moves. The power-off protection component includes a rotating plate 12 installed on the rotating rod 5, and the rotating plate 12 is provided with a first moving contact 1201 and a second moving contact 1202. The top of the heat-conducting tank 4 is provided with a first static contact 13 and a second static contact 14, the first static contact 13 is in abutment with the first moving contact 1201, and the second static contact 14 is in abutment with the second moving contact 1202.

[0059] Further, in the initial state, the temperature in the heater housing 1 is consistent with the room temperature, the first moving contact 1201 is in contact with the first static contact 13, so that the circuit in the heater housing 1 is in the on state, the second moving contact 1202 is in the separated state from the second static contact 14, so that the pump body above the cooling tank 3 is in the dormant state, if the temperature in the heater housing 1 is too high, the rotating rod 5 will rotate, so that the conducting hole 11 is connected with the delivery pipe 16, and at the same time, the rotating rod 5 will also drive the rotating plate 12 to move , so that the first moving contact 1201 is separated from the first static contact 13, so that the circuit in the heater box 1 is disconnected. At the same time, the second moving contact 1202 moves to the abutment position with the second static contact 14, so that the pump body works to cool the heater box 1. When the temperature returns to the normal range, the rotating rod 5 rotates to the initial angle, so that the delivery pipe 16 is blocked again. At the same time, the second moving contact 1202 is controlled to separate from the second static contact 14, and the first moving contact 1201 is abutted with the first static contact 13.

[0060] An explosion-proof electric heater, comprising:

[0061] The resistance heater 17 is installed in the heater housing 1. The heater housing 1 is also provided with a transfer tank 21. The outer wall of the transfer tank 21 is connected with a discharge pipe 27.

[0062] See also Figure 1-Figure 4 , a circulation heating component is arranged on the heater box 1 and connected to the transfer tank 21, and is used to circulate the oil in the heater box 1. The circulation heating component includes a circulation pump 18 installed on the side wall of the heater box 1, and the circulation pump 18 is connected to an absorption pipe 19 and a return pipe 20, and the return pipe 20 is connected to the transfer tank 21; it also includes a guide pipe 22 installed on the side wall of the transfer tank 21 and connected to the transfer tank 21.

[0063] To go further, when the first moving contact 1201 and the first static contact 13 are in contact, the entire circuit in the heater housing 1 is controlled to be connected. A control module is also provided in the heater housing 1 for controlling the operation of the resistance heater 17. In the initial state, under the action of the temperature control switching mechanism, the guide tube 22 is in a conducting state. When the oil needs to be heated, the resistance heater 17 works and heats the oil in the heater housing 1. At the same time, the circulating pump 18 works and transports the oil to the transfer tank 21 through the absorption tube 19 and the reflux tube 20, and then transports it back to the heater housing 1 through the guide tube 22, thereby increasing the fluidity of the oil and making the heating rate faster and more uniform.

[0064] See also Figure 3-Figure 6The temperature control switching mechanism is arranged in the transfer tank 21. The temperature control switching mechanism can switch the conduction state of the circulating heating component and the discharge pipe 27 when the temperature in the transfer tank 21 changes. The temperature control switching mechanism includes a fixed sleeve 28 installed on the side wall of the transfer tank 21 and symmetrically arranged. A limit rod 29 penetrating the transfer tank 21 is slidably installed in the fixed sleeve 28. A fourth spring 30 abutting against the limit rod 29 is arranged in the fixed sleeve 28. The transfer tank 21 A driven component connected to the limit rod 29 is provided inside, wherein the driven component includes a support rod 23 installed in the transfer tank 21, a movable disk 24 is slidably installed on the support rod 23, an inclined ring 2401 is provided at the end of the movable disk 24, the inclined ring 2401 is in contact with the limit rod 29, and a conveying hole 25 cooperating with the discharge pipe 27 is opened on the circumferential outer wall of the inclined ring 2401; it also includes a third spring 26 which is sleeved on the support rod 23 and abuts against the movable disk 24.

[0065] To elaborate, the movable disk 24 divides the transfer tank 21 into two spaces. The space on the side away from the return pipe 20 is also filled with expansion gas. In the initial state, the oil temperature in the heater housing 1 is low, and the expansion gas is in a contracted state. The third spring 26 is in a compressed state, so that the movable disk 24 is located at the end of the stroke away from the return pipe 20, and the delivery hole 25 and the discharge pipe 27 are in a separated state, so that the discharge pipe 27 is in a blocked state, the guide pipe 22 is in a conducting state, and the end of the inclined ring 2401 is inclined. The fourth spring 30 is also in a compressed state, so that the limit rod 29 abuts against the inclined surface of the inclined ring 2401. Under the action of the limit rod 29, a certain resistance is provided to the inclined ring 2401. As the resistance heater 17 works, the temperature of the oil gradually increases, which increases the temperature in the transfer tank 21. At this time, the expansion gas The body expands and, under the action of air pressure, pushes the movable disk 24 to move. Since the limit rod 29 hinders the movement of the tilting ring 2401, the movable disk 24 will not move before the air pressure is lower than a certain value. When the oil temperature is heated to the required temperature, the thrust provided by the air pressure to the movable disk 24 is greater than the resistance provided by the limit rod 29. At this time, the movable disk 24 will quickly move toward the return pipe 20 and drive the limit rod 29 to move through the tilting ring 2401, so that the fourth spring 30 is compressed. At the same time, the movable disk 24 will also compress the third spring 26 and seal the connection between the guide pipe 22 and the transfer tank 21. The movable disk 24 will also drive the delivery hole 25 to move to the connection position with the discharge pipe 27. At this time, the oil delivered by the circulating pump 18 will be delivered to the required heating position through the discharge pipe 27, and after the heating is completed, it will flow back into the heater box 1.

[0066] Preferably, when the oil temperature reaches the set value, if the control module has not failed, the resistance heater 17 can be controlled to automatically disconnect. If the control module has failed, the resistance heater 17 may continue to work, causing the oil temperature to be too high. At this time, the total circuit in the heater box 1 can be disconnected under the action of the overheating power-off protection structure to avoid the risk of use.

[0067] A method for heating a fluid using an explosion-proof electric heater, comprising the following steps:

[0068] Step 1: When heating the oil in the heater box 1, the resistance heater 17 can be controlled to work to heat the oil;

[0069] Step 2: At the same time, the circulating heating component works and circulates the oil in the heater box 1, thereby increasing the fluidity of the oil to speed up the heating rate of the oil;

[0070] Step 3: As the oil temperature rises, the temperature in the transfer tank 21 gradually increases, causing the pressure in the transfer tank 21 to increase. Under the action of the air pressure, the temperature control switching mechanism is driven to move;

[0071] Step 4: When the oil is heated to the required temperature, the temperature switching mechanism will quickly control the circulating heating component to stop circulating the oil and control the discharge pipe 27 to be connected to transport the heated oil to the required location.

[0072] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0073] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An overheat power-off protection structure, comprising: A heater box, and a partition plate installed in the heater box, a heat conduction tank penetrating the heater box is arranged on the partition plate, and a cooling tank is arranged on the top of the heater box, characterized in that it also includes: The temperature-rising follow-up mechanism is arranged in the heat-conducting tank. A conduction regulating component connected to the cooling tank is also arranged in the heat-conducting tank. A delivery pipe connected to the cooling tank is connected to the conduction regulating component. The temperature-rising follow-up mechanism can be actuated when the temperature in the heat-conducting tank changes, and the conduction state of the cooling tank is adjusted by the conduction regulating component, so that the coolant in the cooling tank is delivered to the delivery pipe. A power-off protection component is arranged on the heat-conducting tank and connected to the temperature-raising follow-up mechanism, and can adjust the connection state of the circuit in the heater box when the temperature-raising follow-up mechanism moves; The temperature-raising follow-up mechanism comprises a rotating rod rotatably mounted in the heat-conducting tank and penetrating the heat-conducting tank, a symmetrically arranged guide column is arranged in the heat-conducting tank, a sealing disk and a movable plate slidably connected to the rotating rod are slidably mounted on the guide column, and a guiding assembly connected to the sealing disk is arranged in the heat-conducting tank; The guide assembly includes a guide groove provided on the outer wall of the rotating rod, and a first limit block slidably connected to the guide groove is provided on the inner wall of the sealing disk; and also includes a first spring and a second spring sleeved on the rotating rod, the two ends of the first spring respectively abut against the sealing disk and the movable plate, and the two ends of the second spring respectively abut against the movable plate and the inner wall of the heat conduction tank; The conduction regulating component includes a spiral groove provided on the rotating rod, a second limit block slidably connected to the spiral groove is provided on the inner wall of the movable plate, a conduction hole is provided at the end of the rotating rod, and the conduction hole cooperates with the conveying pipe; and also includes a hollow tube installed at the bottom of the cooling tank, the hollow tube is slidably fitted with the rotating rod and connected to the conveying pipe; The power-off protection component includes a rotating plate installed on a rotating rod, on which a first moving contact and a second moving contact are arranged, and on the top of the heat-conducting tank, a first static contact and a second static contact are arranged, the first static contact is in abutment with the first moving contact, and the second static contact is in abutment with the second moving contact.

2. An explosion-proof electric heater, comprising the overheating power-off protection structure according to claim 1, characterized in that: include: A resistance heater is installed in the heater box, a transfer tank is also arranged in the heater box, and a discharge pipe is connected to the outer wall of the transfer tank; A circulating heating component, disposed on the heater box and connected to the transfer tank, for circulating the oil in the heater box; The temperature control switching mechanism is arranged in the transfer tank, and the temperature control switching mechanism can switch the conduction state of the circulation heating component and the discharge pipe when the temperature in the transfer tank changes.

3. An explosion-proof electric heater according to claim 2, characterized in that: The circulating heating assembly comprises a circulating pump installed on the side wall of the heater housing, the circulating pump is connected with an absorption pipe and a return pipe, and the return pipe is connected with the transfer tank; It also includes a guide pipe installed on the side wall of the transfer tank and connected to the transfer tank.

4. An explosion-proof electric heater according to claim 2, characterized in that: The temperature control switching mechanism includes a fixed sleeve installed on the side wall of the transfer tank and arranged symmetrically, a limit rod penetrating the transfer tank is slidably installed in the fixed sleeve, a fourth spring abutting against the limit rod is arranged in the fixed sleeve, and a driven component connected to the limit rod is arranged in the transfer tank.

5. An explosion-proof electric heater according to claim 4, characterized in that: The driven assembly comprises a support rod installed in the transfer tank, a movable disk is slidably installed on the support rod, an inclined ring is arranged at the end of the movable disk, the inclined ring is in abutment with the limit rod, and a conveying hole is opened on the outer circumference of the inclined ring to cooperate with the discharge pipe; It also includes a third spring which is sleeved on the support rod and abuts against the movable disk.

6. A method for heating a fluid using an explosion-proof electric heater, using an explosion-proof electric heater as claimed in any one of claims 2 to 5, characterized in that: The following steps are involved: Step 1: When heating the oil in the heater box, the resistance heater can be controlled to work to heat the oil; Step 2: At the same time, the circulating heating component works and circulates the oil in the heater box, thereby increasing the fluidity of the oil to speed up the heating rate of the oil; Step 3: As the oil temperature rises, the temperature in the transfer tank gradually increases, causing the pressure in the transfer tank to increase. Under the action of air pressure, the temperature control switching mechanism is driven to move; Step 4: When the oil is heated to the required temperature, the temperature switching mechanism will quickly control the circulating heating component to stop circulating the oil and control the discharge pipe to be connected to transport the heated oil to the required location.

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