Thick film assembly for heating pipe

Abstract

The utility model belongs to the technical field of thick film heating for hard water, and particularly relates to a thick film assembly for a heating pipe, which comprises a thick film heating pipe, an inner pipe is arranged in the thick film heating pipe, and a scale discharging assembly is arranged at the bottom of the inner pipe and used for removing scale falling off from the thick film heating pipe. The thick film assembly is further provided with a dirt discharging opening, the upper end of the inner pipe is connected with a water inlet pipe, the upper end of the thick film heating pipe is connected with a water outlet pipe, and the inner pipe is communicated with the thick film heating pipe. According to the utility model, the scale discharging assembly is arranged, and the characteristic that scale can fall off from the inner wall of the heating pipe under a certain pipe diameter is utilized, so that a user can regularly clean and discharge the scale deposited or formed in the heating pipe by adjusting the opening and closing of a corresponding electromagnetic valve, the service life of the heater is ensured, and the scale is prevented from blocking the thick film heating pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of thick film heating for hard water, and in particular relates to a thick film component for a heating pipe. Background Art

[0002] Thick film heaters have the advantages of small size and high efficiency. Currently, thick film heaters are mostly used in small household water heaters and other equipment. During use, they are mostly used to heat pure water without having to deal with the problem of scale. However, when heating tap water, the scale generated on the inner wall of the heating tube will affect the heat transfer performance of the pipe, causing the film to burst and affecting the life of the heating tube. Users can only disassemble and replace the thick film components or go to after-sales stations for repairs. There is currently no heater that directly cleans the scale in the heating pipe. Summary of the invention

[0003] The utility model solves the problem that the thick film heating components in the existing heaters cannot directly clean the scale formed by heating tap water in the heating tube. A thick film component for a heating tube is provided, and the user can regularly clean and discharge the scale accumulated or formed in the heating tube by adjusting the corresponding solenoid valve switch.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A thick film assembly for a heating tube comprises a thick film heating tube, an inner tube is arranged inside the thick film heating tube, a scale removal assembly is arranged at the bottom of the inner tube, and is used to clear out scale fallen off in the thick film heating tube; the thick film assembly is also provided with a scale removal port; the upper end of the inner tube is connected to a water inlet pipe, the upper end of the thick film heating tube is connected to a water outlet pipe, the inner tube is communicated with the thick film heating tube, tap water is heated by the thick film heating tube, and scale formed and fallen off on the inner wall of the thick film heating tube is cleaned and discharged by the scale removal assembly.

[0006] Preferably, it also includes a lower head, the scale removal component includes a conical head, the lower head is arranged at the bottom of the thick film heating tube, a plurality of water holes are circumferentially provided at the lower end of the inner tube, and a conical head is fixedly arranged inside the inner tube, the conical head is arranged corresponding to the water holes and its tip faces upward, a connecting piece is fixedly arranged under the inner tube, the inner tube is connected to the lower head through the connecting piece, the water in the inner tube is discharged from the water holes, and then passes downward through the connecting piece to discharge the deposited scale.

[0007] Preferably, the connecting piece is funnel-shaped, and a plurality of scale removal holes are provided on the side wall of the connecting piece.

[0008] Preferably, an annular filter is provided between the upper end of the inner tube and the thick film heating tube, so as to prevent the heated water from bringing out the scale therein.

[0009] Preferably, the thick film heating tube is outerly provided with an outer shell, the upper end of the outer shell is fixedly connected to the upper head, and the lower end of the outer shell is fixedly connected to the lower head, the water inlet pipe and the water outlet pipe extend through the upper head, the scale discharge port is located below the thick film heating tube, the lower head is provided with a sewage outlet and is connected with the scale discharge port, tap water enters from the water inlet pipe, is discharged from the water outlet pipe for use after heating is completed, and scale is discharged from the sewage outlet.

[0010] Preferably, temperature sensors are provided at the rear end of the water inlet pipe and the front end of the water outlet pipe to monitor the temperature of the inlet and outlet water.

[0011] Preferably, at least one temperature sensing element and at least two heating tube power connection terminals are provided through the shell, and the heating tube power connection terminals are connected to the thick film heating tube, and the thick film heating tube is protected by the temperature sensing element.

[0012] Preferably, at least one first sealing ring is arranged between the upper end of the thick film heating tube and the upper head, at least one second sealing ring is arranged between the lower end and the lower head, and at least one third sealing ring is arranged between the inner tube and the upper head to ensure the sealing of the water flow transportation and heating process to avoid water leakage.

[0013] Preferably, a solenoid valve is provided on the sewage outlet to control the opening and closing of the sewage outlet.

[0014] Preferably, the inner tube is provided with a different diameter expansion section, and a turbine assembly is sleeved on the inner tube. The outer diameter of the different diameter expansion section is larger than the inner diameter of the turbine assembly and is located below the turbine assembly. The water in the thick film heating tube is stirred by the turbine assembly to ensure uniform heating.

[0015] Preferably, the inner tube comprises an upper tube and a lower tube with the same diameter, the upper end of the lower tube is provided with a different diameter expansion section, and the lower end of the upper tube extends into the different diameter expansion section.

[0016] Preferably, the inner diameter of the thick film heating tube is 34-93 mm. When the inner diameter of the thick film heating tube is within this value range, it is prevented that the scale formed on the inner wall thereof falls off in large pieces or does not fall off at all.

[0017] Preferably, the thick film heating tube comprises a tube body and a thick film heating layer, and the thick film heating layer is arranged on the outer surface of the tube body to achieve heating of the inside of the tube body.

[0018] Preferably, the inner diameter φ of the tube body is: 34mm≤φ<40mm, 40mm≤φ<50mm, 50mm≤φ<63mm, 63mm≤φ<75mm, 75mm≤φ<85mm or 85mm≤φ≤93mm.

[0019] Preferably, the inner diameter φ of the tube body is: 34 mm, 40.5 mm, 61 mm, 73.2 mm, 83.2 mm or 93 mm.

[0020] Preferably, the wall thickness of the tube body is T, and T is: 0.5mm≤T<0.7mm, 0.7mm≤T<1.5mm or 1.5mm≤T≤2.5mm.

[0021] Preferably, the thick film heating layer is provided with an insulating layer, a heating resistor layer and an encapsulation layer from the inside to the outside, and the insulating layer, the heating resistor layer and the encapsulation layer are fixedly connected, the heating resistor layer generates heat when electricity is supplied, and the encapsulation layer and the insulating layer provide protection.

[0022] Preferably, the heating resistor layer is electrically connected to a conductor circuit.

[0023] Preferably, the tube body is a tubular structure made of ferritic stainless steel, and the insulating layer, heating resistor layer and encapsulation layer are curled into an annular columnar structure corresponding to the tube body; the tube body is fixedly connected to the thick film heating layer.

[0024] Through the above technical solution, the beneficial effects of the utility model are:

[0025] 1. The utility model provides a scale removal component, so that the user can regularly clean and remove the scale formed and fallen in the thick film heating tube, thereby avoiding the problem of excessive scale blocking the pipe and requiring replacement or repair of the thick film heating component in the heater.

[0026] 2. The utility model cooperates with the conical head and the water hole to make the water flowing out of the inner tube tilt downward, avoiding directly flushing out the scale deposited at the bottom of the thick film heating tube and avoiding the problem of incomplete discharge of scale caused by upward disturbance of water flow.

[0027] 3. The utility model provides an annular filter to prevent the heated water from bringing out scale when it is discharged for use.

[0028] 4. The utility model sets the inner diameter of the thick film heating tube to avoid the problem that scale formed on the inner wall of the thick film heating tube does not fall off or falls off in large pieces during long-term use, which affects the service life of the heater or blocks the heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0030] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0031] Figure 3 It is a structural schematic diagram of the inner tube of the utility model.

[0032] Figure 4 For this utility model Figure 2 Enlarged view of point A in the middle.

[0033] Figure 5 For this utility model Figure 2 Enlarged view of point B in the middle.

[0034] Figure 6 It is a structural schematic diagram of the thick film heating tube of the utility model.

[0035] The numbers in the accompanying drawings are: 1 is a thick film heating tube, 2 is an inner tube, 3 is an upper head, 4 is a lower head, 5 is an outer shell, 6 is a water inlet pipe, 7 is a water outlet pipe, 8 is a sewage outlet, 9 is a water hole, 10 is a conical head, 11 is a connecting piece, 12 is a scale hole, 13 is an annular filter, 14 is a first sealing ring, 15 is a second sealing ring, 16 is a third sealing ring, 17 is a turbine assembly, 18 is a temperature sensing element, 19 is a heating tube power connection terminal, 20 is a tube body, 21 is an insulating layer, 22 is a heating resistor layer, 23 is an encapsulation layer, and 24 is a conductor line. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0037] like Figure 1 to Figure 6 As shown, this embodiment provides a thick film assembly for a heating tube, including a thick film heating tube 1, an inner tube 2 is arranged inside the thick film heating tube 1, and a scale removal assembly is arranged at the bottom of the inner tube 2, which is used to clean out the scale fallen off in the thick film heating tube 1; the thick film assembly is also provided with a scale removal port, specifically, the bottom of the thick film heating tube 1 is not closed, and the space between the bottom of the thick film heating tube 1 and the inner tube 2 is the scale removal port.

[0038] The upper end of the inner tube 2 is connected to a water inlet pipe 6, and the upper end of the thick film heating tube 1 is connected to a water outlet pipe 7. The inner tube 2 is communicated with the thick film heating tube 1. Water flows into the inner tube 2 from the water inlet pipe 6, and then enters the bottom of the thick film heating tube 1 and is heated in the thick film heating tube 1. As the water level in the thick film heating tube 1 rises, the heating is completed when it reaches the water outlet pipe 7 and flows out through the water outlet pipe 7.

[0039] It also includes a lower head 4, and the scale removal component includes a conical head 10. The lower head 4 is arranged at the bottom of the thick film heating tube 1, and a plurality of water holes 9 are circumferentially provided on the inner side of the lower end of the inner tube 2, and the conical head 10 is fixedly arranged inside the inner tube 2. After the water flows into the inner tube 2, it is dispersed by the conical head 10, and then flows out from the water holes 9 into the thick film heating tube 1. The conical head 10 is arranged corresponding to the water holes 9 and its tip faces upward to ensure that the water flows out of the inner tube 2 at an angle downward.

[0040] A connector 11 is fixedly provided below the inner tube 2, and the inner tube 2 is connected to the lower head 4 via the connector 11. The connector 11 is funnel-shaped, and a plurality of scale discharge holes 12 are provided on the side wall of the connector 11. When scale is discharged through the inner tube 2, the sewage containing scale is discharged downward from the scale discharge holes 12.

[0041] An annular filter screen 13 is arranged between the upper end of the inner tube 2 and the thick film heating tube 1. When the heated hot water flows out, it is filtered through the annular filter screen 13 to prevent scale from flowing out.

[0042] The thick film heating tube 1 is provided with a shell 5 outside, and the thick film heating tube 1 is protected by the shell 5. The upper end of the shell 5 is fixedly connected to the upper head 3, and the lower end is fixedly connected to the lower head 4. The water inlet pipe 6 and the water outlet pipe 7 extend through the upper head 3. The scale discharge port is located below the thick film heating tube 1. The lower head 4 is provided with a sewage discharge port 8 and is connected with the scale discharge port. The sewage containing scale passing through the scale discharge hole 12 is discharged through the sewage discharge port 8 for treatment.

[0043] The rear end of the water inlet pipe 6 and the front end of the water outlet pipe 7 are provided with temperature sensors.

[0044] At least one temperature sensing element 18 and at least two heating tube power connection terminals 19 are arranged through the shell 5. The heating tube power connection terminals 19 are connected to the thick film heating tube 1. The temperature sensing element 18 can use a KSD301 jump-type temperature controller. The heating tube power connection terminals 19 are used to connect the thick film heating tube 1 to a power source.

[0045] At least one first sealing ring 14 is arranged between the upper end of the thick film heating tube 1 and the upper head 3, at least one second sealing ring 15 is arranged between the lower end and the lower head 4, and at least one third sealing ring 16 is arranged between the inner tube 2 and the upper head 3. The first sealing ring 14, the second sealing ring 15, and the third sealing ring 16 cooperate to achieve the sealing of the device when heating water flow and discharging scale to avoid water leakage.

[0046] An electromagnetic valve is arranged outside the sewage outlet 8, and the opening and closing of the sewage outlet 8 is controlled by the electromagnetic valve. During normal use, the electromagnetic valve corresponding to the sewage outlet 8 is closed, and the switch corresponding to the water outlet pipe 7 (such as a faucet) is opened; when discharging scale, the switch corresponding to the water outlet pipe 7 is closed, and the electromagnetic valve corresponding to the sewage outlet 8 is opened to ensure that the sewage containing scale is discharged from the sewage outlet 8 for treatment.

[0047] The inner tube 2 is provided with a reducing expansion section, and a turbine assembly 17 is sleeved on the inner tube. The outer diameter of the reducing expansion section is larger than the inner diameter of the turbine assembly 17 and is located below the turbine assembly 17. The inner tube 2 comprises an upper tube and a lower tube with the same diameter. The upper end of the lower tube is provided with a reducing expansion section, and the lower end of the upper tube extends into the reducing expansion section, and the turbine assembly 17 is limited by the reducing expansion section. It should be noted that the turbine assembly 17 in the utility model was applied for by Xinxiang Jie Da Precision Electronic Devices Co., Ltd. on June 4, 2021, and the application publication number is CN113301677A. It is a guide turbine assembly in a turbine guide device for a thick film heating element, which stirs the water flow in the thick film heating tube 1 to ensure uniform heating.

[0048] The inner diameter of the thick film heating tube 1 is 34-93mm. The thick film heating tube 1 includes a tube body 20 and a thick film heating layer. The thick film heating layer is arranged on the outer surface of the tube body 20. The inner diameter φ of the tube body 20 is: 34mm≤φ<40mm, 40mm≤φ<50mm, 50mm≤φ<63mm, 63mm≤φ<75mm, 75mm≤φ<85mm or 85mm≤φ≤93mm.

[0049] The inner diameter φ of the tube body 20 is: 34 mm, 40.5 mm, 61 mm, 73.2 mm, 83.2 mm or 93 mm.

[0050] As the thick film heating tube 1 is used for a longer time, when the inner diameter of the thick film heating tube 1 is 18.4mm, 21.8mm, 28.4mm, and 118mm, the scale will not fall off in powder form; when the inner diameter of the thick film heating tube 1 is 34mm, 40.5mm, 61mm, 73.2mm, 83.2mm, and 93mm, the scale will fall off in powder form. According to the above experimental data, when the inner diameter of the thick film heating tube 1 is less than 34mm, the scale will fall off in large pieces or not fall off, and when the inner diameter of the thick film heating tube 1 is greater than 93mm, the scale will not fall off. Therefore, setting the inner diameter of the thick film heating tube 1 to 34-93mm can avoid the scale formed on its inner wall from falling off in large pieces or not falling off, avoid blockage and facilitate scale discharge, and at the same time avoid excessive scale thickness that reduces the heating water flow efficiency, causes heat waste and affects the life of the equipment, because the surface temperature of the thick film increases with the increase of scale thickness, affecting the heat transfer of the thick film.

[0051] The wall thickness of the tube body 20 is T, and T is: 0.5 mm ≤ T < 0.7 mm, 0.7 mm ≤ T < 1.5 mm, or 1.5 mm ≤ T ≤ 2.5 mm.

[0052] The thick film heating layer is provided with an insulating layer 21, a heating resistor layer 22 and an encapsulating layer 23 from the inside to the outside. The insulating layer 21, the heating resistor layer 22 and the encapsulating layer 23 are fixedly connected. The encapsulating layer 23 wraps the heating resistor layer 22. The heating resistor layer 22 is energized to generate heat to heat the water in the tube body. The encapsulating layer 23 is made of insulating material. The encapsulating layer 23 protects the internal conductive circuit to avoid scratches and bumps from foreign objects. The heating resistor layer 22 is electrically connected to a conductor circuit 24. The conductive circuit 24 is made of a conductive material (such as silver and / or platinum). The layer 22 is composed of a plurality of annular resistor bars arranged in an upper and lower interval, and the overall structure is an annular columnar structure. The insulating layer 21 is used to avoid protecting the heating resistor layer 22 and the conductor line 24 circuit, and at the same time conduct heat to the tube body 20. The conductor line 24 is electrically connected to the heating resistor layer 22 to achieve electrical connection between different resistor bars of the heating resistor layer 22. The heating resistor layer 22 is connected to the heating tube power connection terminal 19 through the conductor line 24, and the heating tube power connection terminal 19 is connected to the power supply. When in use, the power supply is connected, and the heating resistor layer 22 generates heat to heat the water in the tube body 20.

[0053] The tube body 20 is a tubular structure made of ferrite stainless steel. The insulating layer 21, heating resistor layer 22 and encapsulation layer 23 are curled into an annular columnar structure corresponding to the tube body 20, and each layer is connected by sintering at 850°C. At the same time, an oxide layer is formed on the inner side of the tube body during the sintering process, which can improve the corrosion resistance of the surface and change the metallographic structure and surface roughness of the surface, so that scale is not easy to adhere. The tube body 20 is fixedly connected to the thick film heating layer.

[0054] It should be noted that the thick film heating layer can also be prepared by existing technology.

[0055] During normal use, that is, when heating the water flow, the solenoid valve corresponding to the drain outlet 8 is closed, the switch corresponding to the water outlet pipe 7 is opened, the heating tube power connection terminal 19 is connected to the power supply, and the tap water enters the inner tube 2 from the water inlet pipe 6, and then enters the thick film heating tube 1 from the water hole 9. Since the drain outlet 8 is closed, the water level in the thick film heating tube 1 rises, and the tap water is heated in this process. As the water level rises, the turbine assembly 17 is driven to rotate, and the water in the thick film heating tube 1 is stirred to ensure uniform heating. The heated water passes through the annular filter 13 and enters the water outlet pipe 7 for discharge and then use. At the same time, the setting of the annular filter 13 can prevent scale from being brought out.

[0056] As the equipment is used, scale will gradually adhere to the inner wall of the thick film heating tube 1. The utility model sets the inner diameter of the thick film heating tube 1 to 34-95mm, which effectively prevents the scale formed on the inner wall of the thick film heating tube 1 from falling off in large pieces or not falling off, avoids blockage and facilitates discharge, and at the same time prevents the scale from being too thick, reducing the efficiency of the heating water flow, causing heat waste and affecting the life of the equipment.

[0057] At the same time, due to the annular filter 13, the scale that falls off the inner wall of the thick film heating tube 1 remains in the thick film heating tube 1 and sinks downward into the lower head 4 below the connecting piece 1. Then, by regularly cleaning and discharging the settled scale, the service life of the utility model is extended, avoiding the trouble of replacement or disassembly and maintenance by users.

[0058] The process of cleaning and discharging the settled scale in the thick film heating tube 1 is as follows: close the switch corresponding to the water outlet pipe 7 (such as a faucet), open the solenoid valve corresponding to the drain outlet 8, and the tap water enters the inner tube 2 from the water inlet pipe 6, and is dispersed by the conical head 10 at the lower end of the inner tube 2, thereby entering the thick film heating tube 1 from the water hole 9 along the inclined surface of the conical head 10. Subsequently, the water flow carries the scale through the scale discharge port and the scale discharge hole 12 into the drain outlet 8, and is discharged through the drain outlet 8 to complete the cleaning and discharge of the scale without the user having to go to the after-sales maintenance point for replacement or repair.

[0059] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A thick film component for a heating tube, characterized in that: It comprises a thick film heating tube (1), wherein an inner tube (2) is arranged inside the thick film heating tube (1), and a scale removal component is arranged at the bottom of the inner tube (2) for removing scale fallen off from the thick film heating tube (1); The thick film component is also provided with a scale discharge port; The upper end of the inner tube (2) is connected to a water inlet pipe (6), the upper end of the thick film heating tube (1) is connected to a water outlet pipe (7), and the inner tube (2) is in communication with the thick film heating tube (1).

2. A thick film component for a heating tube according to claim 1, characterized in that: It also includes a lower end cap (4), the descaling assembly includes a conical head (10), the lower end cap (4) is arranged at the bottom of the thick film heating tube (1), a plurality of water holes (9) are circumferentially provided at the lower end of the inner tube (2), and a conical head (10) is fixedly arranged inside the inner tube (2), the conical head (10) is arranged corresponding to the water holes (9) and its tip faces upward, a connecting piece (11) is fixedly arranged below the inner tube (2), and the inner tube (2) is connected to the lower end cap (4) via the connecting piece (11).

3. A thick film assembly for a heating tube according to claim 2, characterized in that: The connecting piece (11) is funnel-shaped, and a plurality of scale removal holes (12) are provided on the side wall of the connecting piece (11).

4. A thick film component for a heating tube according to claim 2, characterized in that: An annular filter screen (13) is provided between the upper end of the inner tube (2) and the thick film heating tube (1).

5. A thick film assembly for a heating tube according to claim 2, characterized in that: The thick film heating tube (1) is provided with an outer shell (5), the upper end of the outer shell (5) is fixedly connected to the upper head (3), and the lower end is fixedly connected to the lower head (4), the water inlet pipe (6) and the water outlet pipe (7) extend through the upper head (3), the scale discharge port is located below the thick film heating tube (1), and the lower head (4) is provided with a sewage discharge port (8) which is in communication with the sewage discharge port.

6. A thick film component for a heating tube according to claim 5, characterized in that: Temperature sensors are provided at the rear end of the water inlet pipe (6) and the front end of the water outlet pipe (7).

7. A thick film assembly for a heating tube according to claim 5, characterized in that: At least one temperature sensing element (18) and at least two heating tube power connection terminals (19) are provided through the housing (5), and the heating tube power connection terminals (19) are connected to the thick film heating tube (1).

8. A thick film component for a heating tube according to claim 5, characterized in that: At least one first sealing ring (14) is arranged between the upper end of the thick film heating tube (1) and the upper end cap (3), at least one second sealing ring (15) is arranged between the lower end and the lower end cap (4), and at least one third sealing ring (16) is arranged between the inner tube (2) and the upper end cap (3).

9. A thick film component for a heating tube according to claim 5, characterized in that: A solenoid valve is arranged outside the sewage outlet (8).

10. The thick film component for a heating tube according to claim 1, characterized in that: The inner tube (2) is provided with a different diameter expansion section, and a turbine assembly (17) is sleeved on the inner tube (2). The different diameter expansion section has an outer diameter greater than an inner diameter of the turbine assembly (17) and is located below the turbine assembly (17).

11. A thick film component for a heating tube according to claim 10, characterized in that: The inner tube (2) comprises an upper tube and a lower tube of the same diameter, the upper end of the lower tube being provided with a different diameter enlarged section, and the lower end of the upper tube extending into the different diameter enlarged section.

12. A thick film assembly for a heating tube according to any one of claims 1 to 11, characterized in that: The inner diameter of the thick film heating tube (1) is 34-93 mm.

13. A thick film assembly for a heating tube according to claim 12, characterized in that: The thick film heating tube (1) comprises a tube body (20) and a thick film heating layer, wherein the thick film heating layer is arranged on the outer surface of the tube body (20).

14. A thick film assembly for a heating tube according to claim 13, characterized in that: The inner diameter φ of the tube body (20) is: 34 mm ≤ φ < 40 mm, 40 mm ≤ φ < 50 mm, 50 mm ≤ φ < 63 mm, 63 mm ≤ φ < 75 mm, 75 mm ≤ φ < 85 mm or 85 mm ≤ φ ≤ 93 mm.

15. A thick film component for a heating tube according to claim 13, characterized in that: The inner diameter φ of the tube body (20) is: 34 mm, 40.5 mm, 61 mm, 73.2 mm, 83.2 mm or 93 mm.

16. A thick film assembly for a heating tube according to claim 13, characterized in that: The wall thickness of the tube body (20) is T, and T is: 0.5 mm ≤ T < 0.7 mm, 0.7 mm ≤ T < 1.5 mm, or 1.5 mm ≤ T ≤ 2.5 mm.

17. A thick film assembly for a heating tube according to claim 13, characterized in that: The thick film heating layer is provided with an insulating layer (21), a heating resistor layer (22) and an encapsulating layer (23) from the inside to the outside, and the insulating layer (21), the heating resistor layer (22) and the encapsulating layer (23) are fixedly connected.

18. A thick film component for a heating tube according to claim 17, characterized in that: The heating resistor layer (22) is electrically connected to a conductor line (24).

19. A thick film component for a heating tube according to claim 17, characterized in that: The tube body (20) is a tubular structure made of ferrite stainless steel, and the insulating layer (21), the heating resistor layer (22) and the encapsulation layer (23) are curled corresponding to the tube body (20) to form an annular columnar structure; The tube body (20) is fixedly connected to the thick film heating layer.

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