Stirring-free self-circulation heater

Abstract

The utility model relates to the technical field of heating devices, in particular to a stirring-free self-circulation heater which comprises a tank body with an opening in the top and a cover plate used for sealing the top of the tank body, and the interior of the tank body is isolated and divided into a feeding area located on the upper portion and a circulation heating area located on the lower portion. A discharging box and a coating pipe are arranged in the circulating heating area, one end of the coating pipe is communicated with the feeding area, the other end of the coating pipe is communicated with the interior of the discharging box, and a discharging opening communicated with the exterior of the tank body is formed in the discharging box; a medium area exists between the discharging box and the tank body, the medium area is used for containing and allowing a medium to flow in the medium area, a first heating assembly is arranged on one side of the circulating heating area, and an air outlet, a liquid outlet and a liquid adding opening are formed in the tank body. The utility model solves the problem that the conventional heat preservation heating device cannot realize uniform heating of the coating on the premise of ensuring the coating performance and controlling the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of heating devices, in particular to a stirring-free self-circulating heater. Background Art

[0002] During the coating application process, especially in low temperature environments, the viscosity of the coating will increase significantly, which will bring many inconveniences to the construction. Solvent-free coatings have a certain viscosity at room temperature. In low temperature environments, their viscosity will further increase, resulting in poor atomization effect during spraying, which not only affects the appearance but also causes serious waste of coatings. In addition, solvent-free coatings are usually two-component and are mainly applied by spraying. It is impossible to reduce the viscosity by adding solvents, which further limits the flexibility and efficiency of construction.

[0003] Existing heat preservation and heating barrels are mainly divided into the following categories: (1) Normal heat preservation and heating barrels: The heating element (such as heating wire) of this type of heating barrel is located at the bottom of the barrel. When using it to heat the paint, it is necessary to stir it manually to ensure that the paint is heated evenly. Using this heating barrel not only increases labor costs, but also easily leads to uneven heating, the bottom paint is easy to stick to the bottom, and some paint performance will fail, causing economic losses. (2) Electric stirring heating barrel: Although this type of heating barrel is equipped with an electric stirring device, the heating element (such as a heating rod) is usually not installed at the bottom of the barrel. It is generally not less than 5 cm from the bottom (flat bottom). If it is a funnel-shaped bottom, the heating element will be farther from the bottom, which makes the paint under the heating element unable to be effectively heated, especially for materials with poor thermal conductivity such as resin; in addition, the part of the paint that contacts the heating element is easy to burn and stick, which not only causes the paint performance to fail, but also blocks the filter valve, spray gun and nozzle where the paint flows. (3) External pressurized circulation heating method: This heating method uses external pressure to press the paint to be heated into the heating tube for circulation heating; however, this heating method is time-consuming and inefficient; and for two-component paints, due to their higher viscosity, additional pressure conveying equipment is required, which not only increases the equipment cost, but also increases the size of the equipment, making it inconvenient to carry and move.

[0004] Therefore, the existing heat preservation and heating device has the problem of being unable to achieve uniform heating of the paint while ensuring the paint performance and controlling the cost. Utility Model Content

[0005] In order to solve the problem that the existing heat preservation and heating devices cannot achieve uniform heating of the paint while ensuring the paint performance and controlling the cost, the utility model provides a stirring-free self-circulating heater, which can achieve efficient and uniform heating without damaging the paint performance.

[0006] In order to solve the above problems, the technical solution of the utility model is:

[0007] The stirring-free self-circulating heater comprises a tank body with an opening at the top and a cover plate for closing the top of the tank body, wherein the interior of the tank body is isolated by a partition, and the interior of the tank body is divided into a feeding area located at the upper part and a circulating heating area located at the lower part;

[0008] A discharge box and at least one paint pipe are provided in the circulation heating area, one end of the paint pipe is connected to the feeding area, the other end of the paint pipe is connected to the inside of the discharge box, and the discharge box is provided with a discharge port connected to the outside of the tank body;

[0009] There is a medium area between the discharge box and the tank body, and the medium area is used to accommodate and allow the medium to flow therein. A heating component is provided on one side of the circulation heating area. The tank body is provided with an air outlet, a liquid outlet and a liquid filling port, and the air outlet and the liquid outlet are respectively located at the upper and lower parts of the circulation heating area.

[0010] By adopting the above scheme, the tank body is divided into a feeding area and a circulating heating area located in the upper and lower spaces respectively by setting a partition, and a discharge box and a paint pipe connected to the feeding area and the discharge box are set in the circulating heating area, and the discharge box is provided with a discharge port connected to the outside of the tank body, so that the paint in the feeding area can pass through the paint pipe and the discharge box in sequence, and then flow out from the discharge port;

[0011] During the flow of the coating, a heating component is arranged on one side of the circulating heating zone, and a medium zone is provided between the discharge box and the tank body for accommodating and allowing the medium to flow therebetween, so that when the heating component heats the medium in the circulating heating zone, the medium temperature will increase, the density will decrease, and the medium will flow upward. When the hot medium flows upward, it will continuously attract the surrounding medium with a lower temperature to flow toward the heating component, so that the medium spontaneously flows to the heating component to heat the entire medium. As more and more hot medium flows to the top of the circulating heating zone, the pressure of the upper hot medium in the enclosed space increases, thereby pressing the medium with a lower temperature to the bottom of the circulating heating zone, so that the medium with a lower temperature will continuously flow to the bottom of the circulating heating zone, and then flow to the heating component to heat all the medium, until the medium is evenly heated to the set temperature. Then, a thermal siphon phenomenon is formed in the circulating heating zone. During the whole process, the flow of the medium is spontaneous, and the medium with a high temperature and the medium with a low temperature can be evenly mixed, so as to achieve the temperature consistency of the heating of the medium, thereby ensuring that the temperature of the heated coating remains consistent.

[0012] On the basis of the above scheme, the present invention can also make the following improvements:

[0013] Furthermore, a partition plate 2 is provided in the circulation heating zone, and the partition plate 2 divides the circulation heating zone into an upper circulation heating zone 1 and a lower circulation heating zone 2. At least one water outlet is provided on the partition plate 2 on one side of the discharge box, and at least one siphon is provided on the partition plate 2 on the other side of the discharge box. The siphon connects the circulation heating zone 1 with the circulation heating zone 2, and the heating component 1 is arranged below the siphon.

[0014] By adopting the above-mentioned further technical solution, a siphon tube is separately provided, and the heating component 1 is arranged below the siphon tube, so that the heated medium in the circulation heating zone 2 flows upward through the siphon tube, and the medium with lower temperature in the circulation heating zone 1 is supplemented to the circulation heating zone 2 through the drain port, so that the flow of water is more intense, thereby forming a more obvious thermal siphon phenomenon, so that the media in the two areas can form a natural circulation more effectively.

[0015] Furthermore, the top of the siphon tube is 5 to 15 mm, 15 to 30 mm or 30 to 50 mm lower than the partition, which is conducive to the overflow of the heat medium, thereby ensuring the siphon effect.

[0016] Furthermore, a heating component 2 is provided in the middle of the circulating heating zone 1 to ensure the overall temperature of the medium.

[0017] Furthermore, the heating component 1 includes a heating rod 1 and a temperature controller 1 electrically connected to the heating rod 1.

[0018] Furthermore, the second heating component includes a second heating rod and a second temperature controller electrically connected to the second heating rod.

[0019] By adopting the above-mentioned further scheme, the power and size of heating rod one and heating rod two are designed according to the capacity of the tank and the heating requirements of the paint to ensure that sufficient heat can be provided. Through the setting of the thermostat, the temperature of the medium near the heating rod can be monitored in real time, and the start and stop of the heating rod can be automatically controlled according to the preset temperature range.

[0020] Furthermore, a liquid level gauge is provided on the tank body, which is convenient for observing the liquid level of the medium inside the tank body, so that when the liquid level of the medium inside the tank body is low, the medium can be replenished in time.

[0021] Furthermore, the discharge box is funnel-shaped, and the discharge port is located at the bottom of the discharge box, which is convenient for discharging the heated paint.

[0022] Furthermore, the liquid level of the medium in the circulation heating zone is 3-5 mm, 5-10 mm or 10-15 mm lower than the top of the siphon tube, thereby preventing the liquid level of the medium from being too high and sealing the siphon tube outlet, thereby ensuring the stable occurrence of the siphon phenomenon.

[0023] Through the above technical solution, the beneficial effects of the utility model are:

[0024] 1. When the utility model is in use, the medium is heated by a pair of heating rods. At this time, the temperature of the heated medium increases, and the density decreases, so that it flows upward, and then continuously attracts the surrounding medium with a lower temperature to flow toward the heating rod, so that the medium spontaneously flows to one side of the heating rod to achieve the heating of the entire medium; at the same time, as more and more heat medium flows to the top of the circulation heating zone, the pressure of the upper heat medium in the closed space increases, thereby pressing the medium with a lower temperature to the bottom of the circulation heating zone, so that the medium with a lower temperature continuously flows to the bottom of the circulation heating zone, and then flows to the side of the heating rod to achieve the heating of all the medium, until the medium is evenly heated to the set temperature, thereby generating a thermal siphon phenomenon in the tank body. During the whole process, the flow of the medium is spontaneous, which can achieve uniform mixing of the high-temperature medium and the low-temperature medium, thereby achieving temperature consistency of the medium heating, thereby ensuring that the temperature of the heated coating remains consistent.

[0025] 2. In the utility model, a partition plate 2 is additionally provided in the circulation heating zone, thereby dividing the circulation heating zone into an upper circulation heating zone 1 and a lower circulation heating zone 2, and a water outlet and a siphon are respectively provided on the partition plate 2, and a heating component 1 is provided below the siphon, so that the heated water flows upward through the siphon and the medium outlet with a lower temperature in the circulation heating zone 1 is supplemented to the circulation heating zone 2, so that the water flow is more intense, thereby forming a more obvious thermal siphon phenomenon.

[0026] 3. In the present invention, by arranging a liquid level gauge on the tank body, the liquid level of the medium inside the tank body can be observed by observing the liquid level of the medium in the liquid level gauge, which is convenient for observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0028] Figure 2 It is a perspective view of the first embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a partition plate 1, a discharge box and a coating pipe in Embodiment 1 of the present utility model;

[0030] Figure 4 It is a perspective view of the second embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the partition plate 1, the partition plate 2, the discharge box, the siphon tube and the paint tube in the second embodiment of the utility model. Figure 1 ;

[0032] Figure 6 This is a schematic diagram of the structure of the partition plate 1, the partition plate 2, the discharge box, the siphon tube and the paint tube in the second embodiment of the utility model. Figure 2 ;

[0033] Figure 7 is a perspective view of Example 3 (the paint tube is hidden).

[0034] The reference numerals in the accompanying drawings are: 1, tank body, 101, feeding zone, 102, circulating heating zone, 1021, circulating heating zone 1, 1022, circulating heating zone 2;

[0035] 2. Cover plate, 3. Partition plate 1, 4. Discharge box, 5. Paint pipe, 6. Discharge port, 7. Heating component 1, 71. Heating rod 1, 72. Temperature controller 1;

[0036] 8. Air outlet, 9. Liquid outlet, 10. Liquid filling port, 11. Partition 2, 111. Drain, 12. Siphon, 13. Heating component 2, 1301. Heating rod 2, 1302. Thermostat 2, 14. Liquid level meter. DETAILED DESCRIPTION

[0037] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Embodiment 1: Figure 1 to Figure 3 As shown, the stirring-free self-circulating heater comprises a tank body 1 with an opening at the top and a cover plate 2 for closing the top of the tank body 1, wherein the cover plate 2 is hinged to the tank body 1, and a partition plate 3 is arranged inside the tank body 1, wherein the edge of the partition plate 3 is in contact with the inner wall of the tank body 1, and the partition plate 3 divides the tank body 1 into a feeding area 101 at the top and a circulating heating area 102 at the bottom;

[0039] The circulating heating area 102 is provided with a discharge box 4 and five 10 mm paint tubes 5. The paint tubes 5 are conventional tubes with openings at both ends, which are used to circulate paint. The partition 13 and the discharge box 4 are provided with through holes of the same number as the paint tubes 5. One end of the paint tube 5 passes through the partition 13 and is connected to the feeding area 101, and the other end of the paint tube 5 is connected to the inside of the discharge box 4. The discharge box 4 is funnel-shaped, and the bottom of the discharge box 4 is provided with a 40 mm discharge port 6 connected to the outside of the tank body 1. The discharge port 6 is connected to a pipeline to facilitate the transportation of the heated paint.

[0040] There is a medium area between the discharge box 4 and the tank body 1, and the medium area is used to accommodate and allow the medium to flow therebetween. A heating component 7 is provided at the lower part of one side of the circulation heating zone 102. An air outlet 8, a liquid outlet 9 and a liquid filling port 10 are provided on the tank body 1. The air outlet 8 and the liquid filling port 10 are located at the upper part of the circulation heating zone 102, and the liquid outlet 9 is located at the lower part of the circulation heating zone 102. The air outlet 8 is higher than the liquid filling port 10. The air outlet 8, the liquid outlet 9 and the liquid filling port 10 are all provided with a blocking structure, such as a valve, etc.;

[0041] The heating component 7 includes a heating rod 71 and a temperature controller 72 electrically connected to the heating rod 71 .

[0042] In this embodiment, the medium is water, the liquid level of water is 5 to 10 mm lower than the partition, and the heating temperature of the water in the circulation heating zone 102 is 45°C to 75°C. The heating rod 71 can use a flange heating tube or a threaded heating tube, and the thermostat 72 uses a K-type PT100 temperature sensor (thermocouple). When the thermostat 72 detects that the temperature of the water near the heating rod 71 is higher than 70°C, the heating rod 71 stops heating. When the thermostat 72 detects that the temperature of the water near the heating rod 71 is lower than 50°C, the heating rod 71 starts heating.

[0043] In this embodiment, the tank body 1 is divided into a feeding area 101 and a circulating heating area 102 located in the upper and lower spaces respectively by setting a partition 3, and a discharge box 4 and a coating pipe 5 connected with the feeding area 101 and the discharge box 4 are set in the circulating heating area 102, and the discharge box 4 is provided with a discharge port 6 connected with the outside of the tank body 1, so that the coating in the feeding area 101 can pass through the coating pipe 5 and the discharge box 4 in sequence, and then flow out from the discharge port 6;

[0044] During the process of coating flow, since there is a medium area between the discharge box 4 and the tank body 1 for accommodating and allowing water to flow therebetween, when the temperature controller 72 is used to control the heating rod 71 to heat the water in the circulating heating area 102, the temperature of the heated water increases and the density decreases, so that it will continue to flow upward. When the hot water flows upward, it will continuously attract the surrounding water with lower temperature to flow toward the heating rod 71, thereby realizing the spontaneous flow of water to the heating rod 71 to achieve the heating of the entire water; as more and more hot water flows to the top of the circulating heating area 102, the closed The pressure of the hot water in the upper part of the space increases, thereby pressing the water with a lower temperature to the bottom of the circulating heating area 102, so that the water with a lower temperature will continuously flow to the bottom of the circulating heating area 102, and then flow to the heating rod 71 to achieve the heating of all the water, until the water is evenly heated to the set temperature, thereby forming a thermal siphon phenomenon in the circulating heating area 102. During the whole process, the flow of water is spontaneous, which can achieve uniform mixing of high-temperature water and low-temperature water, thereby achieving temperature consistency of the water heating, thereby ensuring that the temperature of the coating is kept consistent.

[0045] As an implementable embodiment, a liquid level gauge 14 is provided on the outside of the tank body 1. The liquid level gauge 14 adopts a conventional U-shaped tube or L-shaped tube. The U-shaped tube or L-shaped tube is provided with a scale. By observing the liquid level scale of the water in the U-shaped tube or L-shaped tube, the liquid level of the water inside the tank body 1 can be observed, so that when the liquid level of the water inside the tank body 1 is low, water can be added in time; in this embodiment, the liquid level gauge 14 adopts an L-shaped tube, and the bottom of the L-shaped tube is connected to the bottom of the circulating heating zone 102, so that the water in the circulating heating zone 102 can enter the L-shaped tube.

[0046] In this embodiment, an additional insulation layer (for example, 5-20 mm rubber-plastic foam board or polyurethane foam) is added to the outside of the heater. At the same time, a protective plate is added to the outside of the insulation layer to protect the insulation layer and play a certain aesthetic role. The relevant pipes can be used normally after penetrating the insulation layer and the protective plate.

[0047] In this embodiment, when used:

[0048] Open the air outlet 8 and the liquid adding port 10, and add water to the circulating heating zone 102 through the liquid adding port 10. During the water adding process, the air in the circulating heating zone 102 is discharged from the air outlet 8. During the water adding process, the liquid level of the water inside the tank body 1 can be known by observing the height of the liquid level in the L-shaped tube. Add water until the water level is 5 to 10 mm lower than the partition, stop adding water, close the air outlet 8 and the liquid adding port 10, and turn on the heating rod 71 to heat the water for 8 to 15 minutes. At this time, the water in the circulating heating zone 102 will produce a thermal siphon phenomenon (that is, the temperature of the heated water rises, The density becomes smaller, so it flows upward, and then continuously attracts the surrounding water with lower temperature to flow toward the heating rod 71, so that the water spontaneously flows to the heating rod 71 to achieve the heating of the whole water; as more and more hot water flows to the top of the circulating heating area 102, the pressure of the upper hot water in the closed space increases, so that the water with lower temperature is pressed to the bottom of the circulating heating area 102, so that the water with lower temperature continuously flows to the bottom of the circulating heating area 102, and then flows to the heating rod 71 to achieve the heating of all the water, until the water is evenly heated to the set temperature);

[0049] At this time, the cover plate 2 is opened, and the paint to be heated is poured into the feeding area 101. The paint in the feeding area 101 passes through the paint pipe 5, the discharge box 4, and then flows out from the discharge port 6, and the heating can be realized;

[0050] While the paint is continuously heated, the height of the water level in the tank 1 is observed by observing the water level scale in the L-shaped tube. When the water level is low, first stop pouring the paint to be heated into the feeding area 101, then open the air outlet 8 and the liquid filling port 10 to replenish water, and then close the air outlet 8 and the liquid filling port 10 after the water replenishment is completed.

[0051] Embodiment 2: The technical solution in this embodiment is the same as that in Embodiment 1, except that:

[0052] like Figures 4 to 6 As shown, a partition 11 is provided in the circulation heating zone 102, and the partition 11 is arranged at the edge of the discharge box 4, and the edge of the partition 11 is in contact with the inner wall of the tank body 1, and the partition 11 divides the circulation heating zone 102 into an upper circulation heating zone 1 1021 and a lower circulation heating zone 2 1022, and three water outlets 111 are provided on the partition 11 on one side of the discharge box 4, and a 10-20 mm siphon tube 12 is provided on the partition 11 on the other side of the discharge box 4, and the siphon tube 12 connects the circulation heating zone 1 1021 and the circulation heating zone 2 1022, and the siphon tube 12 is a conventional tube body with openings at both ends, and water flows therein, and the heating component 7 is provided below the siphon tube 12 and is located in the circulation heating zone 2 1022.

[0053] In this embodiment, a siphon tube 12 is separately provided, and the heating component 7 is provided below the siphon tube 12, so that the heated water in the circulation heating zone 1022 flows upward through the siphon tube 12, and the water with lower temperature in the circulation heating zone 1021 is replenished to the circulation heating zone 1022 through the drain port 111, so that the flow of water is more intense, thereby forming a more obvious thermal siphon phenomenon.

[0054] As an implementable embodiment, the top end of the siphon tube 12 is 5 to 15 mm lower than the partition, providing space for hot water to overflow from the siphon tube 12 .

[0055] As an implementable embodiment, the liquid level of the medium in the circulating heating zone 102 is 3 to 15 mm lower than the top of the siphon tube 12, thereby preventing the water liquid level from being too high to seal the outlet of the siphon tube 12, thereby ensuring the stable occurrence of the siphon phenomenon.

[0056] In this embodiment, when used:

[0057] The thermal siphon phenomenon occurs as follows: the temperature of the heated water in the circulation heating zone 1022 increases and its density decreases, thereby continuously flowing upward along the siphon tube 12, and then continuously attracting the water with lower temperature in the circulation heating zone 1022 to flow toward the heating rod 71, that is, the water spontaneously flows to the heating rod 71 to achieve heating; as more and more hot water flows to the top of the circulation heating zone 1021, the pressure of the upper hot water in the enclosed space increases, thereby pressing the water with lower temperature to the bottom of the circulation heating zone 1021, and replenishing it into the circulation heating zone 1022 through the drain port 111, and then flowing to the heating rod 71 to achieve heating of all the water, until the water is evenly heated to the set temperature.

[0058] Embodiment 3: The technical solution in this embodiment is the same as that in Embodiment 2, except that:

[0059] like Figure 7 As shown, a heating component 2 13 is provided in the middle of the circulation heating zone 1 1021 ; the heating component 2 13 includes a heating rod 2 1301 and a temperature controller 2 1302 electrically connected to the heating rod 2 1301 .

[0060] In this embodiment, the heating rod 1301 is used to ensure the overall temperature of the water in the circulation heating zone 102; the heating rod 1301 can adopt a flange heating tube or a threaded heating tube, and the thermostat 1302 adopts a K-type PT100 temperature sensor (thermocouple). When the thermostat 1302 detects that the temperature of the water near the heating rod 1301 is higher than 70°C, the heating rod 1301 stops heating; when the thermostat 1302 detects that the temperature of the water near the heating rod 1301 is lower than 50°C, the heating rod 1301 starts heating.

[0061] In this embodiment, when used:

[0062] Turn on heating rod 1 71 and heating rod 2 1301 at the same time to heat the water in the circulating heating area 102.

[0063] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0064] The preferred implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the above-mentioned embodiments. Without violating the spirit of the present invention, i.e., the disclosure scope, any equivalent or equivalent deformation or replacement of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A stirring-free self-circulating heater, comprising a tank body (1) with an opening at the top and a cover plate (2) for closing the top of the tank body (1), characterized in that: The interior of the tank body (1) is isolated, and the interior of the tank body (1) is divided into a feeding area (101) located at the upper part and a circulation heating area (102) located at the lower part; A discharge box (4) and at least one paint pipe (5) are provided in the circulation heating zone (102); one end of the paint pipe (5) is connected to the feeding zone (101), and the other end of the paint pipe (5) is connected to the inside of the discharge box (4); and a discharge port (6) connected to the outside of the tank body (1) is provided on the discharge box (4); A medium zone is provided between the discharge box (4) and the tank body (1), the medium zone being used to contain and allow the medium to flow therebetween; a heating component (7) is provided on one side of the circulation heating zone (102); an air outlet (8), a liquid outlet (9) and a liquid filling port (10) are provided on the tank body (1); the air outlet (8) and the liquid outlet (9) are respectively located at the upper part and the lower part of the circulation heating zone (102); A partition plate 2 (11) is provided in the circulation heating zone (102), and the partition plate 2 (11) divides the circulation heating zone (102) into a circulation heating zone 1 (1021) located at the upper part and a circulation heating zone 2 (1022) located at the lower part. At least one water outlet (111) is provided on the partition plate 2 (11) on one side of the discharge box (4), and at least one siphon tube (12) is provided on the partition plate 2 (11) on the other side of the discharge box (4). The siphon tube (12) connects the circulation heating zone 1 (1021) and the circulation heating zone 2 (1022), and the heating component 1 (7) is arranged below the siphon tube (12).

2. The stirring-free self-circulating heater according to claim 1, characterized in that: The interior of the tank body (1) is isolated by a partition plate (3).

3. The stirring-free self-circulating heater according to claim 2, characterized in that: The top end of the siphon tube (12) is 5 to 50 mm lower than the partition plate (3).

4. The stirring-free self-circulating heater according to claim 1, characterized in that: A heating component 2 (13) is provided in the middle of the circulation heating zone 1 (1021).

5. The stirring-free self-circulating heater according to claim 1, characterized in that: The heating component 1 (7) comprises a heating rod 1 (71) and a temperature controller 1 (72) electrically connected to the heating rod 1 (71).

6. The stirring-free self-circulating heater according to claim 4, characterized in that: The second heating component (13) includes a second heating rod (1301) and a second temperature controller (1302) electrically connected to the second heating rod (1301).

7. The stirring-free self-circulating heater according to any one of claims 1 to 6, characterized in that: The tank body (1) is provided with a liquid level meter (14).

8. The stirring-free self-circulating heater according to any one of claims 1 to 6, characterized in that: The discharge box (4) is funnel-shaped, and the discharge port (6) is located at the bottom of the discharge box (4).

9. The stirring-free self-circulating heater according to any one of claims 1 to 6, characterized in that: The liquid level of the medium in the circulation heating zone (102) is 3 to 15 mm lower than the top of the siphon tube (12).

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