Heating device

Abstract

The utility model relates to the technical field of fluid heating, in particular to a heating device which comprises a shell and an electric heating pipe with a heating flow channel, the electric heating pipe comprises a pipe base body and an electric heating film layer, the pipe base body comprises a spiral part, at least part of the electric heating film layer is arranged on the spiral part, the heating device comprises a connecting piece, and the connecting piece is connected with the shell. At least part of the connecting piece is located in the inner cavity of the shell, and the connecting piece is connected with the shell and the spiral part. According to the device, the connecting piece is installed between the shell and the spiral part, the spiral part is supported through the connecting piece, on one hand, the assembling difficulty between the electric heating pipe and the shell is reduced, and on the other hand, the problem that the electric heating pipe is damaged due to unreasonable assembling of the electric heating pipe and the shell is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid heating, in particular to a heating device. Background Art

[0002] Fluid heating equipment can be used in the semiconductor, photovoltaic solar energy, display panels, testing equipment, micro-chemical and other industries, such as wet cleaning equipment in semiconductor processes. Fluid heating equipment can be applied to multiple links, such as etching and degumming, ultrapure water cleaning, etc. These all require heating of acid and alkali liquids, chemical liquids, pure water or ultrapure water. By increasing the temperature of the cleaning liquid, the cleaning effect is improved and the cleaning speed is accelerated.

[0003] Since the fluid heating equipment needs to heat a large flow of fluid, if the assembly structure between the heating tube and the shell is not designed properly, the equipment will be damaged due to the excessive overall weight of the heating tube. Utility Model Content

[0004] The utility model aims to solve the problems pointed out in the background technology and proposes a heating device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A heating device comprises a shell and an electric heating tube with a heating flow channel, wherein the electric heating tube comprises a tube substrate and an electric heating film layer, wherein the tube substrate comprises a spiral portion, and at least a portion of the electric heating film layer is arranged on the spiral portion; the heating device comprises a connecting piece, at least a portion of the connecting piece is located in an inner cavity of the shell, and the connecting piece connects the shell and the spiral portion.

[0007] The spiral portion is provided with at least one supporting area, the connecting piece is at least partially connected to the supporting area, the electric heating film layer located in the spiral portion is attached with at least one low resistance layer, the supporting area is located in the low resistance layer, and the resistance of the low resistance layer is less than the resistance of the electric heating film layer.

[0008] The connecting member includes a third supporting member and a supporting column. The supporting column is fixed to the housing. The third supporting member is connected to the supporting column. The third supporting member is a clamp or a rope or a chain or a buckle.

[0009] The third support member includes a third fixing ring, the third fixing ring has a third assembly hole, the support area is at least partially located in the third assembly hole, the third fixing ring is provided with a third ear body on the outer circumference, the outer shell is fixedly installed with a support column, and the third ear body is fixedly assembled with the support column.

[0010] At least two third ear bodies are provided on the outer circumference of the third fixing ring, and the third ear body has a fourth hole. The support column passes through the fourth hole, and the support column is at least partially provided with an external thread. At least two second nuts are threadedly connected to the support column, and the third ear body is clamped between two of the second nuts.

[0011] The third supporting member includes a second semi-ring body, a third semi-ring body, and a third fixing member, wherein the second semi-ring body has a second recess, the third semi-ring body has a third recess, the second recess and the third recess form the third assembly hole, second ears extend outwardly from both ends of the second semi-ring body, the second ears are provided with a third hole, third ears extend outwardly from both ends of the third semi-ring body, the third ears are provided with a fifth hole and the fourth hole, the second ear and the third ear abut against each other, and the third hole and the fifth hole are correspondingly arranged, the second ear and the third ear are fixed by the third fixing member; or the second semi-ring body is provided with a third elastic portion protruding outward; or the third semi-ring body is provided with a fourth elastic portion protruding outward.

[0012] The shell comprises a cylinder shell, an upper cover assembled at one end of the cylinder shell, and a lower cover assembled at the other end of the cylinder shell. One end of the support column is fixed to the upper cover, and the other end is fixed to the lower cover.

[0013] The electric heating tube comprises a first end portion, the first end portion is located at one end of the spiral portion, and the heating device comprises a first elastic support member, the first elastic support member connects the first end portion and the housing;

[0014] And / or the electric heating tube includes a second end portion, the second end portion is located at the other end of the spiral portion, and the heating device includes a second elastic support member, the second elastic support member connects the second end portion and the shell.

[0015] The first elastic support member comprises a first fixing ring, the first fixing ring has a first assembly hole, the first end is at least partially located in the first assembly hole, a first ear body is arranged on the outer circumference of the first fixing ring, the housing is provided with a first mounting seat, the first ear body is fixedly assembled with the first mounting seat, and a first movable space is arranged between the first fixing ring and the first mounting seat;

[0016] And / or the second elastic support member includes a second fixing ring, the second fixing ring has a second assembly hole, the second end is at least partially located in the second assembly hole, the second ear body is provided on the outer circumference of the second fixing ring, the outer shell is provided with a second mounting seat, the second ear body is fixedly assembled with the second mounting seat, and a second movable space is provided between the second fixing ring and the second mounting seat.

[0017] The first mounting seat has a groove and support surfaces on both sides of the groove, at least two first ear bodies are arranged on the outer circumference of the first fixing ring, the first ear bodies are provided with fixing holes, the two first ear bodies are supported on the two support surfaces respectively, and the first ear bodies are fixed to the first mounting seat through a first fixing member, the first fixing ring is at least partially located in the groove, and a gap is arranged between the first fixing ring and the wall of the groove;

[0018] The first elastic support member includes two first semi-ring bodies, the first semi-ring bodies have a first recess, the first recesses of the two first semi-ring bodies form the first assembly hole, first ears extend outward at both ends of the first semi-ring body, the first ears are provided with second holes, the first ears of the two first semi-ring bodies abut against each other to form the first ear body, and the second holes of the first ears of the two first semi-ring bodies correspond to form the fixing hole; or the first semi-ring body is provided with a first elastic portion protruding outward.

[0019] The utility model proposes a heating device, which has the beneficial effect that a connecting piece is installed between the outer shell of the device and the spiral part, and the connecting piece supports the spiral part, which reduces the difficulty of assembling the electric heating tube and the shell on the one hand, and avoids the problem of damage to the electric heating tube due to unreasonable assembly of the electric heating tube and the shell on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the assembly structure of the electric heating tube and the shell of the utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the electric heating tube and the shell assembly of the utility model;

[0022] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A;

[0023] Figure 4 This is a schematic diagram of the structure of the third support member of the utility model;

[0024] Figure 5 This is a schematic structural diagram of the first embodiment of the electric heating tube of the utility model;

[0025] Figure 6 This is a structural schematic diagram of a second embodiment of the electric heating tube of the utility model;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the first elastic support member and the first mounting seat of the utility model;

[0027] Figure 8 It is a schematic diagram of the main structure of the first elastic support member and the first mounting seat of the utility model;

[0028] Fig. 9 This is a schematic diagram of the first half ring structure of the utility model;

[0029] Fig.10 This is a schematic diagram of the structure of the second elastic support member and the second mounting seat of the utility model;

[0030] Fig.11 This is a schematic diagram of the assembly structure of the second half ring body and the third half ring body of the utility model;

[0031] Fig.12 It is a schematic diagram of the external structure of the utility model.

[0032] In the figure: housing 1, upper cover 2, lower cover 3, electric heating tube 4, spiral portion 5, first end 6, second end 7, first elastic support member 8, second elastic support member 9, third support member 10, first mounting seat 11, supporting surface 111, groove 12, first assembly hole 13, first elastic portion 14, first ear body 15, fixing hole 16, first fixing ring 17, first semi-ring body 18, first recess 19, first ear portion 21, second hole 22, first screw 23, second screw 24, first nut 25, spacer Gap 26, second mounting seat 27, second ear body 28, second fixing ring 29, second assembly hole 30, support column 31, second nut 32, third ear body 33, third fixing ring 34, third assembly hole 35, third elastic portion 36, second recess 37, second semi-ring body 38, third hole 39, second ear 40, third ear 41, fourth hole 42, third semi-ring body 43, fourth elastic portion 44, third recess 45, tube base 46, low resistance layer 47, electric heating film layer 48, support area 49. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] Reference Figure 1-Figure 12 A heating device includes a shell 1, an electric heating tube 4 with a heating flow channel, the electric heating tube 4 includes a tube base 46 and an electric heating film layer 48, the tube base 46 includes a spiral portion 5, at least part of the electric heating film layer 48 is arranged on the spiral portion 5, the heating device includes a connecting member 50, at least part of the connecting member 50 is located in the inner cavity of the shell 1, and the connecting member 50 connects the shell 1 and the spiral portion 5.

[0035] When the device is working, the electric heating film layer 48 is energized to generate heat, and the fluid passing through the inside of the tube matrix 46 is heated by heat conduction of the tube matrix 46. The electric heating tube 4 of the device has a spiral portion 5, which can increase the length of the heating flow channel within a certain space, so that the heating effect of the entire electric heating tube 4 is better. When working, there is flowing fluid inside the entire electric heating tube 4, which makes the entire electric heating tube 4 heavier. A connector 50 is installed between the shell 1 of the device and the spiral portion 5, and the spiral portion 5 is supported by the connector 50. On the one hand, the difficulty of assembling the electric heating tube 4 and the shell is reduced, and on the other hand, the problem of damage to the electric heating tube 4 due to unreasonable assembly of the electric heating tube 4 and the shell is avoided.

[0036] As an implementation method, refer to Figure 5 The spiral portion 5 is provided with at least one supporting area 49, and the connecting member 50 is at least partially connected to the supporting area 49. The device is provided with a supporting area 49 on the spiral portion 5, and the connecting member 50 is installed between the supporting area 49 and the shell 1, which can better protect the electric heating film layer. The electric heating film layer 48 located on the spiral portion 5 is attached with at least one low-resistance layer 47, and the supporting area 49 is located in the low-resistance layer 47. The resistance of the low-resistance layer 47 is less than the resistance of the electric heating film layer 48. The electric heating film layer 48 of the spiral portion 5 is coated with a low-resistance layer 47, such as a silver layer. This area serves as a fixed area for installing the third support member 10. Since the resistance of this area is smaller than that of the electric heating film layer 48, when powered on, more current will be conducted to the electric heating film layer 48 areas on both sides through the low-resistance layer 47, while the current flowing through the electric heating film layer 48 covered by the low-resistance layer 47 will be relatively small. Therefore, the heat generated in the low-resistance layer 47 area will be relatively small, and the thermal impact on the subsequent suspended materials will be relatively small, thereby improving the working stability of the third support member 10 after installation and making the third support member 10 more supportive. At the same time, the low-resistance layer 47 will also play a certain protective role on the electric heating film layer, reducing the possibility of the electric heating film layer being damaged by the contact part of the third support member 10.

[0037] As an embodiment, the connecting member 50 includes a third support member 10 and a support column 31. The support column 31 is fixed to the outer shell 1, and the third support member 10 is connected to the support column 31. The third support member 10 is a clamp or a rope or a chain or a buckle. The outer shell 1 can be made of non-conductive material in whole or in part, such as plastic, or the support column 31 is made of non-conductive material, and the third support member 10 can be made of metal material or high-temperature resistant plastic material. The third support member 10 is a metal clamp or a wire or a metal chain, etc.

[0038] refer to Figure 3 , Figure 4The third support member 10 includes a third fixing ring 34, the third fixing ring 34 has a third assembly hole 35, the support area 49 is at least partially located in the third assembly hole 35, the third fixing ring 34 is provided with a third ear body 33 on the outer circumference, the outer shell 1 is fixedly installed with a support column 31, and the third ear body 33 is fixedly assembled with the support column 31.

[0039] The supporting area 49 of the spiral portion 5 is fixed in the third assembly hole 35 of the third fixing ring 34 , and connected to the supporting column 31 through the third ear body 33 . The third ear body 33 serves as a supporting part of the third fixing ring 34 .

[0040] When the device is used in the pan-semiconductor field, such as integrated circuits, flat panel displays, LEDs, solar cells, discrete devices, and semiconductor equipment and materials industries, including semiconductors, the heating flow rate of the liquid is relatively large, so the size of the entire electric heating tube 4 is relatively large, the diameter of the electric heating tube can be 20-80mm, the wall thickness is 2-3mm, and the length of the electric heating tube after unfolding can be between 2-5 meters. Therefore, the weight of the electric heating tube itself is heavier, which can reach 2-3kg. At the same time, the electric heating tube enters the liquid from the bottom and exits the liquid from the top, and the residual liquid in the pipeline is also heavier. In the working state, the weight of the heating tube can be as high as 5-7kg, so the third support member 10 can play a reliable supporting and shock-absorbing role for the electric heating tube 4.

[0041] As an implementation method, refer to Figure 3 , Figure 4 At least two third ear bodies 33 are provided on the outer circumference of the third fixing ring 34. The third ear body 33 has a fourth hole 42. The support column 31 passes through the fourth hole 42. The support column 31 is at least partially provided with an external thread. At least two second nuts 32 are threadedly connected to the support column 31. The third ear body 33 is sandwiched between the two second nuts 32. The third fixing ring 34 is elastically supported on the support column 31 by the two third ear bodies 33, and the third ear body 33 is locked on the support column 31 by the second nut 32.

[0042] Specifically, refer to Figure 3 , Fig.11The third support member 10 includes a second semi-ring body 38, a third semi-ring body 43, and a third fixing member 51. The second semi-ring body 38 has a second recess 37, and the third semi-ring body 43 has a third recess 45. The second recess 37 and the third recess 45 form a third assembly hole 35. The second semi-ring body 38 has second ears 40 extending outward at both ends, and the second ear 40 is provided with a third hole 39. The third semi-ring body 43 has third ears 41 extending outward at both ends, and the third ear 41 is provided with a fifth hole 52 and a fourth hole 42. The second ear 40 and the third ear 41 are abutted against each other, and the third hole 39 and the fifth hole are correspondingly arranged. The second ear 40 and the third ear 41 are fixed by the third fixing member; or the second semi-ring body 38 is provided with a third elastic portion 36 protruding outward; or the third semi-ring body 43 is provided with a fourth elastic portion 44 protruding outward.

[0043] The second semi-ring body 38 and the third semi-ring body 43 are locked together by a third fixing member, for example, fixed together by screws and nuts, and the third ear portion 41 is used as an elastic support portion of the third fixing ring 34. In addition, the third elastic portion 36 and the fourth elastic portion 44 are arranged so that they can better wrap the outer wall of the electric heating tube through their own deformation, thereby improving the fit.

[0044] refer to Figure 4 First, the screw passes through the third hole 39 and the fifth hole and is locked by a nut to fix the third support member on the supporting area of ​​the spiral portion. Then the support column passes through the fourth hole 42, and the position of the third ear 41 is locked by two nuts. The third hole 39 and the fifth hole of the device are slotted hole structures to avoid the problem that the fixing screws are difficult to fix due to structural deformation of the slot holes during suspension. The fourth hole 42 is a round hole to better cooperate with the support column. The third ear 41 of the device is longer than the second ear 40 to avoid the problem that the second semi-ring body 38 and the third semi-ring body 43 are deformed and the support column is difficult to penetrate.

[0045] refer to Figure 1 , Fig.12 The outer shell 1 includes a cylinder shell 53, an upper cover 2 assembled at one end of the cylinder shell, and a lower cover 3 assembled at the other end of the cylinder shell. One end of the support column 31 is fixed to the upper cover 2 and the other end is fixed to the lower cover 3. The cylinder shell can be a polygonal cylinder such as a cylinder, a quadrilateral cylinder, a pentagonal cylinder, etc. One end of the support column 31 is assembled with the upper cover 2 and the other end is assembled with the lower cover 3.

[0046] As an implementation method, refer to Figure 1 , Figure 6-Figure 10The electric heating tube 4 includes a first end portion 6, which is located at one end of the spiral portion 5, and the heating device includes a first elastic support member 8, which connects the first end portion 6 and the outer shell 1; and / or the electric heating tube 4 includes a second end portion 7, which is located at the other end of the spiral portion 5, and the heating device includes a second elastic support member 9, which connects the second end portion 7 and the outer shell 1.

[0047] This device forms an assembly method of elastic connection between the electric heating tube 4 and the shell 1. Due to the elastic connection, that is, the connecting piece between the electric heating tube 4 and the shell 1 has an elastic deformation amount, the elastic deformation amount can achieve a certain tolerance assembly, reduce the manufacturing accuracy of the structure between the electric heating tube 4 and the shell 1, and the elastic connection method can play a shock-absorbing role.

[0048] refer to Figure 5 The second end 7 and the first end 6 can be arranged along the radial direction of the spiral portion, referring to Figure 6 The second end portion 7 and the first end portion 6 may also be arranged along the axial direction of the spiral portion.

[0049] As an embodiment of the first elastic support member 8, the first elastic support member 8 includes a first fixing ring 17, the first fixing ring 17 has a first assembly hole 13, the first end 6 is at least partially located in the first assembly hole 13, the first fixing ring 17 is provided with a first ear body 15 on the outer circumference, for example, the first ear body 15 extends in the radial direction of the first fixing ring 17, the housing 1 is provided with a first mounting seat 11, the first ear body 15 is fixedly assembled with the first mounting seat 11, and a first movable space is provided between the first fixing ring 17 and the first mounting seat 11;

[0050] The first end portion 6 is assembled with the first fixing ring 17, the first ear body 15 is fixed with the first mounting seat 11, and a first movable space is provided between the first fixing ring 17 and the first mounting seat 11. The first ear body 15 is used as an elastic support portion so that the first fixing ring 17 can perform elastic movement in the first movable space.

[0051] And / or the second elastic support member 9 includes a second fixing ring 29, the second fixing ring 29 has a second assembly hole 30, the second end 7 is at least partially located in the second assembly hole 30, the second fixing ring 29 is provided with a second ear body 28 on the outer circumference, the housing 1 is provided with a second mounting seat 27, the second ear body 28 is fixedly assembled with the second mounting seat 27, and a second activity space is provided between the second fixing ring 29 and the second mounting seat 27. The second ear body 28 is used as the elastic support part, so that the second fixing ring 29 can perform elastic movement in the second activity space.

[0052] The first elastic support member 8 and the second elastic support member 9 may be made of metal or elastic plastic.

[0053] The first mounting seat 11 has a groove 12 and support surfaces 111 located on both sides of the groove 12. At least two first ear bodies 15 are arranged on the outer circumference of the first fixing ring 17. The first ear bodies 15 are provided with fixing holes 16. The two first ear bodies 15 are supported on the two support surfaces 111 respectively, and the first ear bodies 15 are fixed to the first mounting seat 11 through a first fixing member. The first fixing ring 17 is at least partially located in the groove 12, and a gap 26 is provided between the first fixing ring 17 and the wall of the groove 12. The first mounting seat 11 is provided with a groove 12, and support surfaces 111 are provided on both sides of the groove 12. The first ear bodies 15 on both sides of the first fixing ring 17 are fixedly supported on the support surfaces 111, and a gap 26 is provided between the first fixing ring 17 and the wall of the groove 12, so that the first fixing ring 17 can move elastically close to or away from the first mounting seat 11, wherein the gap 26 is part of the first activity space.

[0054] The first elastic support member 8 includes two first semi-ring bodies 18, the first semi-ring bodies 18 have a first recess 19, the first recesses 19 of the two first semi-ring bodies 18 form a first assembly hole 13, first ears 21 extend outwardly from both ends of the first semi-ring bodies 18, the first ears 21 are provided with a second hole 22, the first ears 21 of the two first semi-ring bodies 18 abut to form a first ear body 15, and the second holes 22 of the first ears 21 of the two first semi-ring bodies 18 correspond to form a fixing hole 16; or the first semi-ring body 18 is provided with a first elastic portion 14 protruding outward, wherein the first elastic portion 14 can better wrap the outer wall of the electric heating tube by its own deformation, thereby improving the fit.

[0055] Two first semi-ring bodies 18 with first ears 21 are butt-jointed to form a first elastic member 8, and the second holes 22 are respectively aligned to form a fixing hole 16 for installing a first fixing member, wherein the first fixing member can be a first screw 23, and the first ear 21 is fixed to the first mounting seat 11 by the first screw 23, which is simple and convenient to install. As another embodiment, when butt-jointed, the first holes of the two first ears 21 are respectively aligned to form a hole body for installing a second fixing member, and the second fixing member includes a second screw 24 and a first nut 25, and the two first semi-ring bodies 18 are fixed to the electric heating tube by the second screw 24 and the first nut 25 and then locked on the support seat.

[0056] The spiral part 5 of the device adopts a vertically arranged spiral structure, the second end 7 and the first end 6 are arranged horizontally, and the first elastic support member 8, the second elastic support member 9 and the third support member 10 have at least an elastic deformation amount of up and down movement, which can achieve a better tolerance assembly effect, that is, reduce the requirements for the height tolerance and parallelism of the second end 7 and the first end 6 in the process of spiral tube coiling, and can also play a shock-absorbing role. The heating equipment adopting this arrangement has lower manufacturing and assembly difficulty and better safety.

[0057] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technical solution, concept, and design obtained by equivalent replacement or change based on the technical solution and utility model concept of the utility model by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model.

Claims

1. A heating device, characterized in that: The invention comprises a shell (1) and an electric heating tube (4) having a heating flow channel, wherein the electric heating tube (4) comprises a tube base (46) and an electric heating film layer (48), wherein the tube base (46) comprises a spiral portion (5), wherein at least a portion of the electric heating film layer (48) is arranged on the spiral portion (5), and wherein the heating device comprises a connecting piece (50), wherein at least a portion of the connecting piece (50) is located in an inner cavity of the shell (1), and wherein the connecting piece (50) connects the shell (1) and the spiral portion (5).

2. A heating device according to claim 1, characterized in that: The spiral portion (5) is provided with at least one supporting area (49), the connecting member (50) is at least partially connected to the supporting area (49), the electric heating film layer (48) located on the spiral portion (5) is attached with at least one low resistance layer (47), the supporting area (49) is located on the low resistance layer (47), and the resistance of the low resistance layer (47) is less than the resistance of the electric heating film layer (48).

3. A heating device according to claim 2, characterized in that: The connecting member (50) comprises a third supporting member (10) and a supporting column (31), wherein the supporting column (31) is fixed to the housing (1), the third supporting member (10) is connected to the supporting column (31), and the third supporting member (10) is a clamp or a rope or a chain or a buckle.

4. A heating device according to claim 3, characterized in that: The third support member (10) comprises a third fixing ring (34), the third fixing ring (34) having a third assembly hole (35), the supporting area (49) being at least partially located in the third assembly hole (35), a third ear body (33) being provided on the outer circumference of the third fixing ring (34), a supporting column (31) being fixedly mounted on the housing (1), and the third ear body (33) being fixedly assembled with the supporting column (31).

5. A heating device according to claim 4, characterized in that: At least two third ear bodies (33) are provided on the outer circumference of the third fixing ring (34), the third ear body (33) has a fourth hole (42), the support column (31) passes through the fourth hole (42), the support column (31) is at least partially provided with an external thread, at least two second nuts (32) are threadedly connected to the support column (31), and the third ear body (33) is sandwiched between the two second nuts (32).

6. A heating device according to claim 5, characterized in that: The third support member (10) comprises a second semi-ring body (38), a third semi-ring body (43), and a third fixing member (51); the second semi-ring body (38) has a second recess (37); the third semi-ring body (43) has a third recess (45); the second recess (37) and the third recess (45) form the third assembly hole (35); the second semi-ring body (38) has second ears (40) extending outward at both ends; the second ears (40) are provided with a third hole (39); the third semi-ring body (43) has a second recess (37) extending outward at both ends; A third ear portion (41) is extended outwardly, the third ear portion (41) is provided with a fifth hole (52) and the fourth hole (42), the second ear portion (40) and the third ear portion (41) are abutted against each other, and the third hole (39) and the fifth hole (52) are arranged correspondingly, the second ear portion (40) and the third ear portion (41) are fixed by the third fixing member (51); or the second semi-ring body (38) is provided with a third elastic portion (36) protruding outwardly; or the third semi-ring body (43) is provided with a fourth elastic portion (44) protruding outwardly.

7. A heating device according to claim 5, characterized in that: The outer shell (1) comprises a cylindrical shell (53), an upper cover (2) mounted on one end of the cylindrical shell (53), and a lower cover (3) mounted on the other end of the cylindrical shell (53); one end of the support column (31) is fixed to the upper cover (2), and the other end is fixed to the lower cover (3).

8. A heating device according to any one of claims 1 to 7, characterized in that: The electric heating tube (4) comprises a first end portion (6), the first end portion (6) being located at one end of the spiral portion (5), and the heating device comprises a first elastic support member (8), the first elastic support member (8) connecting the first end portion (6) and the housing (1); And / or the electric heating tube (4) comprises a second end (7), the second end (7) is located at the other end of the spiral portion (5), and the heating device comprises a second elastic support member (9), the second elastic support member (9) connects the second end (7) and the housing (1).

9. A heating device according to claim 8, characterized in that: The first elastic support member (8) comprises a first fixing ring (17), the first fixing ring (17) having a first assembly hole (13), the first end portion (6) being at least partially located in the first assembly hole (13), a first ear body (15) being provided on the outer circumference of the first fixing ring (17), the housing (1) being provided with a first mounting seat (11), the first ear body (15) being fixedly assembled with the first mounting seat (11), and a first movable space being provided between the first fixing ring (17) and the first mounting seat (11); And / or the second elastic support member (9) comprises a second fixing ring (29), the second fixing ring (29) has a second assembly hole (30), the second end portion (7) is at least partially located in the second assembly hole (30), a second ear body (28) is provided on the outer circumference of the second fixing ring (29), the housing (1) is provided with a second mounting seat (27), the second ear body (28) is fixedly assembled with the second mounting seat (27), and a second movable space is provided between the second fixing ring (29) and the second mounting seat (27).

10. A heating device according to claim 9, characterized in that: The first mounting seat (11) has a groove (12) and support surfaces (111) located on both sides of the groove (12); at least two first ear bodies (15) are provided on the outer circumference of the first fixing ring (17); the first ear bodies (15) are provided with fixing holes (16); the two first ear bodies (15) are supported on the two support surfaces (111) respectively, and the first ear bodies (15) are fixed to the first mounting seat (11) via a first fixing member; the first fixing ring (17) is at least partially located in the groove (12), and a gap (26) is provided between the first fixing ring (17) and the wall of the groove (12); The first elastic support member (8) comprises two first semi-ring bodies (18), the first semi-ring bodies (18) having a first recess (19), the first recesses (19) of the two first semi-ring bodies (18) forming the first assembly hole (13), first ears (21) extending outwardly from both ends of the first semi-ring body (18), the first ears (21) being provided with a second hole (22), the first ears (21) of the two first semi-ring bodies (18) abutting against each other to form the first ear body (15), and the second holes (22) of the first ears (21) of the two first semi-ring bodies (18) correspondingly forming the fixing hole (16); or the first semi-ring body (18) is provided with a first elastic portion (14) protruding outwardly.

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