A heater

Abstract

The heater comprises an electrode and a buckle, the electrode comprises a strip part, a first clamping part and a second clamping part, the first clamping part is connected with the second clamping part through the strip part; the second direction is perpendicular or substantially perpendicular to the first direction, the first clamping part and the second clamping part are arranged along the first direction; the buckle comprises a first matching part, a second matching part and a connecting part; the first matching part is limitingly connected with the first clamping part, and the second matching part is limitingly connected with the second clamping part; the buckle further comprises a first limiting part, along the second direction, the first limiting part is located on one side of the first clamping part, and the connecting part is located on the other side of the first clamping part; along the direction perpendicular to the second direction, the first limiting part is at least partially protruded relative to the first matching part, at least a part of the first limiting part can be projected on the first clamping part along the second direction, and the first limiting part can limit one side of the first clamping part, thereby reducing the risk of loosening of the buckle from the electrode along the second direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric heating, in particular to a heater. BACKGROUND

[0002] The electric heater comprises a tubular heating pipe and a ring-shaped electrode, the main body of the electrode surrounds and contacts the heating pipe, and the electrode is capable of conducting electricity. Figure 12 As shown in the figure, the two ends of the electrode 6 need to be connected by the buckle 5, the two ends of the buckle 5 are respectively inserted into the two ends of the electrode 6 along the vertical direction, and in a relatively vibrating environment, the buckle 5 has the risk of slipping off the electrode. SUMMARY

[0003] The purpose of the present application is to provide a heater which can reduce the risk of the buckle slipping off the electrode.

[0004] One embodiment of the present application provides a heater comprising an electrode and a buckle, the electrode comprises a strip-shaped part, a first clamping part and a second clamping part, the first clamping part is connected to the second clamping part through the strip-shaped part; a first direction and a second direction are defined, the second direction is perpendicular or approximately perpendicular to the first direction, the first clamping part and the second clamping part are arranged along the first direction; the buckle comprises a first matching part, a second matching part and a connecting part, the first matching part is connected to the second matching part through the connecting part; the first matching part and the second matching part are arranged along the first direction; the first matching part is limitingly connected to the first clamping part, and the second matching part is limitingly connected to the second clamping part; the buckle further comprises a first limiting part, along the second direction, the first limiting part is located on one side of the first clamping part, and the connecting part is located on the other side of the first clamping part; along the direction perpendicular to the second direction, the first limiting part is at least partially protruding relative to the first matching part, and at least a part of the first limiting part can be projected on the first clamping part along the second direction.

[0005] In the heater provided by one embodiment of the present application, along the direction perpendicular to the second direction, the first limiting part is at least partially protruding relative to the first matching part, along the second direction, the first limiting part and the connecting part are located on both sides of the first clamping part, at least a part of the first limiting part can be projected on the first clamping part along the second direction, and the first limiting part can limit one side of the first clamping part, thereby reducing the risk of the buckle slipping off the electrode along the second direction. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 A perspective structural schematic diagram of one embodiment of the electrode and the buckle of the present application is shown;

[0007] Figure 2 A perspective structural schematic diagram of one embodiment of the electrode and the buckle of the present application is shown; Figure 1An exploded view of the electrode and the buckle;

[0008] Figure 3 A perspective view of the electrode and the buckle is shown. Figure 1 A side view of the electrode and the buckle is shown.

[0009] Figure 4 A perspective view of the electrode and the buckle is shown. Figure 3 A sectional view of the electrode and the buckle along line A-A is shown.

[0010] Figure 4a A perspective view of the electrode and the buckle is shown. Figure 4 A sectional view of the electrode and the buckle is shown.

[0011] Figure 5 A perspective view of a part of one embodiment of the heater of the present application is shown.

[0012] Figure 6 A top view of another embodiment of the buckle is shown.

[0013] Figure 7 A perspective view of another embodiment of the electrode and the buckle is shown.

[0014] Figure 8 A perspective view of the electrode and the buckle is shown. Figure 7 An exploded view of the electrode and the buckle is shown.

[0015] Figure 9 A perspective view of the electrode and the buckle is shown. Figure 7 A side view of the electrode and the buckle is shown.

[0016] Figure 10 A perspective view of the electrode and the buckle is shown. Figure 9 A sectional view of the electrode and the buckle along line B-B is shown.

[0017] Figure 11 A perspective view of the electrode and the buckle is shown. Figure 10 An assembly view of the electrode and the buckle is shown.

[0018] Figure 12 A sectional view of another embodiment of the electrode and the buckle is shown.

[0019] Figure 13 A perspective view of the electrode and the buckle is shown. DETAILED DESCRIPTION

[0020] The embodiments will be described in detail below with reference to the accompanying drawings.

[0021] Figure 5A part of a heater is shown, the heater comprises a tube 3 having a flow channel 31 and a heating film 4 in contact with the outer circumferential part of the tube 3. The heater comprises an electrode 1, the electrode 1 comprises a strip part 11, the strip part 11 encircles the tube 3, at least a part of the strip part 11 is in contact with the heating film 4. The heating film 4 is capable of heating, the heating film 4 is a film containing nanometer material, the heating film 4 covers the outer circumferential part of the tube 3. The heating film 4 is capable of heating the fluid in the flow channel 31. The heater of the present application is applied in vehicles and other environments with strong vibration.

[0022] As shown in Figures 1 to 4 , the electrode 1 comprises a first clamping part 12 and a second clamping part 13, the strip part 11 is annular, the two ends of the strip part 11 are separated by a distance, and the strip part 11 as a whole is "C" shaped. The first clamping part 12 is connected to one end of the strip part 11, and the second clamping part 13 is connected to the other end of the strip part 11. Define a first direction X and a second direction Y, the second direction Y is perpendicular or approximately perpendicular to the first direction X. "Approximately perpendicular" means that the included angle between the first direction X and the second direction Y is within a small range of about 90°, for example, the included angle between the first direction X and the second direction Y is within the range of 80°-100°. The first clamping part 12 and the second clamping part 13 are arranged along the first direction X and separated by a distance.

[0023] As shown in Figures 1 to 4 , the heater further comprises a buckle 2, the buckle 2 comprises a first matching part 21, a second matching part 22, a first limiting part 25, a second limiting part 26 and a connecting part 23, the first matching part 21 is connected to the second matching part 22 through the connecting part 23, the first matching part 21 and the second matching part 22 are arranged along the first direction X, and the first matching part 21 and the second matching part 22 are separated by a distance along the first direction X. The first matching part 21 is limitingly connected with the first clamping part 12, and "limitingly connected" in the present application means that the first matching part 21 and the first clamping part 12 cannot move relative to each other in at least one direction, such as abutting or hinged. The second matching part 22 is limitingly connected with the second clamping part 13.

[0024] Along the first direction X, at least a part of the first clamping part 12 and at least a part of the second clamping part 13 are located between the first matching part 21 and the second matching part 22. The first matching part 21 at least partially abuts the first clamping part 12, and the second matching part 22 at least partially abuts the second clamping part 13. The first matching part 21 and the second matching part 22 can clamp the first clamping part 12 and the second clamping part 13 along the first direction X, and apply opposite pressure to the first clamping part 12 and the second clamping part 13, so that the electrode 1 is tightly attached to the heating film 4, reducing the contact resistance between the electrode 1 and the heating film 4, and in the case of strong vibration, reducing the risk of relative displacement between the electrode 1 and the heating film 4.

[0025] like Figure 4 As shown, along the second direction Y, the connecting portion 23 is located on one side of the first engaging portion 12, and the first limiting portion 25 is located on the other side of the first engaging portion 12. Perpendicular to the second direction, at least a portion of the first limiting portion 25 protrudes relative to the first mating portion 21, and at least a portion of the first limiting portion 25 can project onto the first engaging portion 12 along the second direction Y, meaning that the first engaging portion 12 will be blocked by the first limiting portion 25 when sliding along the second direction Y. Therefore, the first limiting portion 25 can limit one side of the first engaging portion 12, and the connecting portion 23 can limit the other side of the first engaging portion 12, thereby reducing the risk of the buckle 2 slipping off from the electrode 1 along the second direction Y, and further reducing the risk of the electrode 1 becoming loose from the tube 3.

[0026] like Figure 4 As shown, in this embodiment, along the first direction X, the second limiting portion 26 protrudes towards the first engaging portion 21 relative to the second engaging portion 22, and the first limiting portion 25 protrudes towards the second engaging portion 22 relative to the first engaging portion 21. There is a distance between the first limiting portion 25 and the second limiting portion 26, and the latch 2 has an opening 24 located between the first limiting portion 25 and the second limiting portion 26. Specifically, the first limiting portion 25 and the second limiting portion 26 protrude towards each other, that is, the first limiting portion 25 and the second limiting portion 26 form a "recessed" structure. The second limiting portion 26 reduces the risk of the second engaging portion 13 disengaging from the latch 2 along the second direction Y, further reducing the risk of the latch 2 disengaging from the electrode 1. Figure 4a As shown, in this embodiment, along the first direction X, the height b of the first limiting portion 25 protruding from the first mating portion is greater than the thickness a of the first engaging portion 12, making it more difficult for the first engaging portion 12 to disengage from the latch 2 via the first limiting portion 25. In this embodiment, the first limiting portion 25 is integrally formed with the first mating portion 21. The first limiting portion 25 is strip-shaped and extends from one end of the first mating portion 21, forming an "L"-shaped structure. In other embodiments, the first limiting portion 25 may have other shapes, such as a disc shape or a triangular shape. The second limiting portion 26 may have the same or similar structure as the first limiting portion 25.

[0027] like Figures 1 to 4As shown, the first limiting portion 25 is connected with the first matching portion 21, and the second limiting portion 26 is connected with the second matching portion 22. The first limiting portion 25, the first matching portion 21, the second matching portion 22 and the connecting portion 23 are integrally arranged, and the first matching portion 21, the second matching portion 22 and the connecting portion 23 are in strip shape, so that the structure of the buckle 2 is relatively simple, and the number of parts and the processing cost can be reduced. In the embodiment, the buckle 2 is integrally formed by a columnar metal wire, so that the structure of the buckle 2 is simpler and easier to manufacture, and the metal wire can be a cylindrical metal wire with a diameter of 1mm-2mm. In other embodiments, the buckle 2 can also be integrally formed by a metal strip. The buckle 2 is made of a material with certain elasticity, and the buckle 2 can be made of steel, such as stainless steel. In other embodiments, the buckle 2 is made of plastic, and the buckle 2 can also be integrally injection molded.

[0028] As shown in the drawings, Figures 1 to 4 In the embodiment, the first matching portion 21 is in straight strip shape, the second matching portion 22 is in straight strip shape, the first matching portion 21 extends along the second direction Y, the second matching portion 22 extends along the second direction Y, and the first matching portion 21, the second matching portion 22 and the connecting portion 23 form a "U" shaped structure. The connecting portion 23 is in strip shape, and the connecting portion 23 has an elastic deformation portion 231 which is in bent or curved shape, and the elastic deformation portion 231 arches away from the first matching portion 21 and the second matching portion 22, so that the connecting portion 23 can be deformed, and the first matching portion 21 and the second matching portion 22 can be close to or separated from each other. The curvature radius of the elastic deformation portion 231 is smaller than that of other parts of the connecting portion 23, the elastic deformation portion 231 can generate greater elastic force, and the curvature radius of the elastic deformation portion 231 can be 0.5mm-2mm. When assembling the heater, the first clamping portion 12 and the second clamping portion 13 are pushed into the first matching portion 21 and the second matching portion 22 from the opening 24 of the buckle 2 along the second direction Y, and the clamping operation can be completed, so that the assembly is relatively simple. In addition, if a certain wear occurs between the electrode 1 and the heating film 4, the wear can also be compensated under the elastic force of the buckle 2.

[0029] The top end of the first limiting portion 25 is in arc shape, so that when the first clamping portion 12 slides over the top end of the first limiting portion 25 during assembly of the buckle 2, the resistance is smaller, and the assembly is more convenient. The top end of the second limiting portion 26 is in arc shape, so that when the second clamping portion 13 slides over the top end of the second limiting portion 26, the resistance is smaller.

[0030] The buckle 2 further comprises a first guide portion 27 and a second guide portion 28. The first guide portion 27 is connected with the first limiting portion 25, and the second guide portion 28 is connected with the second limiting portion 26. In the second direction Y, the first guide portion 27 is away from the first fitting portion 21 relative to the first limiting portion 25, and the second guide portion 28 is away from the second fitting portion 22 relative to the second limiting portion 26. In the direction away from the first limiting portion 25 and the second limiting portion 26, the distance between the first guide portion 27 and the second guide portion 28 gradually increases, and the minimum distance between the first guide portion 27 and the second guide portion 28 is greater than the minimum distance between the first limiting portion 25 and the second limiting portion 26. The buckle 2 is detachably connected with the electrode 1, and the first guide portion 27 and the second guide portion 28 can play a guiding role, which is conducive to the sliding of the first clamping portion 12 and the second clamping portion 13 into the buckle 2 and reduces the assembly difficulty. In the embodiment, the first guide portion 27 and the second guide portion 28 are straight strips, the first guide portion 27 and the second guide portion 28 are formed by metal wires or metal strips, and the included angle between the first guide portion 27 and the second guide portion 28 is an obtuse angle, which can be 140°-90°. This is conducive to the sliding of the first clamping portion 12 and the second clamping portion 13 into the buckle 2.

[0031] The first clamping portion 12 comprises a first groove 14, and the second clamping portion 13 comprises a second groove 15. In the first direction X, the first groove 14 and the second groove 15 open in opposite directions. The first groove 14 corresponds to the first fitting portion 21, and the second groove 15 corresponds to the second fitting portion 22. At least a portion of the first fitting portion 21 is located in the first groove 14, and at least a portion of the second fitting portion 22 is located in the second groove 15. The first groove 14 can limit the first fitting portion 21, and the second groove 15 can limit the second fitting portion 22.

[0032] In the embodiment, the first groove 14 is a straight groove, and the extension direction of the first groove 14 is the same as the extension direction of the first fitting portion 21. In the direction perpendicular to the extension direction of the first fitting portion 21, the first groove 14 can limit the movement of the first fitting portion 21 in the direction perpendicular to the extension direction of the first fitting portion. The second groove 15 is a straight groove, and the extension direction of the second groove 15 is the same as the extension direction of the second fitting portion 22. When the buckle 2 is assembled with the electrode 1, the first groove 14 and the second groove 15 can play a guiding role.

[0033] In the embodiment, the first clamping portion 12, the second clamping portion 13, and the strip-shaped portion 11 are integrally provided, which can reduce the number of parts and the processing cost. The electrode 1 can be made of copper alloy material or silver material, such as bronze material, which is easy to conduct electricity.

[0034] The electrode 1 further comprises a wiring portion 17 which is connected with and integrally provided with the first clamping portion 12 or the second clamping portion 13, thereby reducing the number of parts, eliminating the need for bolt fastening, simplifying the assembly process, and further saving costs. In the present embodiment, the wiring portion 17 is in the form of a strip, and the first clamping portion 12, the second clamping portion 13 and the strip-shaped portion 11 are also in the form of strips. The electrode 1 is integrally formed from a metal strip, thereby simplifying the manufacturing process of the electrode and reducing costs. In the present embodiment, the wiring portion 17 is a plug-in type terminal, and the wiring portion has a through hole 171. When the wiring portion 17 is connected with a mating female terminal, a boss provided on the mating female terminal can be inserted into the through hole 171, thereby forming a mechanical locking. In other embodiments, the wiring portion 17 can be a crimping type terminal, and the wiring portion has a crimping groove which can be buckled with a connector. The wiring portion 17 can be designed to be of a type which can be used in pairs with existing connection terminals, thereby facilitating the connection with a counterpart terminal, for example, a blade type or a cylindrical pin type which can be used in pairs with existing standard electrical terminals.

[0035] A third direction is defined, which is perpendicular to the first direction X and the second direction Y, and along the third direction, the wiring portion 17 extends away from the strip-shaped portion 11. This makes the buckle 2 not interfere with the wiring portion 17 when the buckle 2 is mounted with the electrode 1.

[0036] In other embodiments of the buckle, as shown in Figure 6 The first limiting portion 125 is provided separately from the first cooperating portion 121. One part of the first limiting portion 125 is connected with the first cooperating portion 121, and another part of the first limiting portion 125 is connected with the second cooperating portion 122, and the first limiting portion 125 is detachably connected with the first cooperating portion 121 and the second cooperating portion 122. For example, the first limiting portion 125 is an elastic ring-shaped rubber band, or the first limiting portion 125 is a pin.

[0037] As shown in Figures 7 to 11As shown in another embodiment of the heater, the heater comprises an electrode 41 and a buckle 42, the buckle 42 comprises a first engaging portion 421, a second engaging portion 422, a connecting portion 423, a first limiting portion 425, a second limiting portion 426 and a first guiding portion 427. The electrode 41 comprises a strip portion 411, a first clamping portion 412, a second clamping portion 413 and an electric connecting portion 417. In this embodiment, the first clamping portion 412, the second clamping portion 413, the strip portion 411 and the electric connecting portion 417 are all in columnar shape, and the electrode 41 can be integrally formed by a columnar metal wire, so that the electrode 41 is simple in structure and easy to manufacture. The bending structure of the electrode 41 in this embodiment is similar to that of the electrode 1 in the previous embodiment, and this embodiment only replaces the metal strip used for manufacturing the electrode in the previous embodiment with a metal wire. The first engaging portion 421, the second engaging portion 422, the connecting portion 423, the first limiting portion 425, the second limiting portion 426 and the first guiding portion 427 are all in strip shape, and the buckle 42 is also integrally formed by a metal wire. The first clamping portion 412 comprises a first recess 414, and the second clamping portion 413 comprises a second recess 415.

[0038] As shown in Figures 7 to 11 , the first engaging portion 421 has an arc shape, and the first engaging portion 421 is arched away from the second engaging portion 422, and at least a part of the first engaging portion 421 is located in the first recess 414. The second engaging portion 422 has an arc shape, and the second engaging portion 422 is arched away from the first engaging portion 421, and at least a part of the second engaging portion 422 is located in the second recess 415. The first engaging portion 421, the second engaging portion 422 and the connecting portion 423 form a “C” shape structure with an opening on one side. The arc-shaped first engaging portion 421 and the second engaging portion 422 can have a certain elasticity, so that the distance between the first engaging portion 421 and the second engaging portion 422 can be changed. In addition, the arc-shaped first engaging portion 421 and the second engaging portion 422 can adapt to the columnar first clamping portion 412 and the second clamping portion 413, and reduce friction. As shown in Figure 8 , Figure 10 and Figure 11 , in this embodiment, when the buckle 42 is assembled with the electrode 41, the second engaging portion 422 of the buckle 42 is first hooked on the second clamping portion 413, and then the buckle 42 is rotated around the second clamping portion 413 until the first engaging portion 421 is clamped into the first recess 414. The first guiding portion 427 can be used as a force point for rotating the buckle 42.

[0039] In other embodiments of the heater, Figure 12As shown, the heater comprises an electrode and a buckle, the buckle comprising a first fitting part 521, a second fitting part 522, a connecting part 523, a first limiting part 525, and a second limiting part 526. The electrode comprises a strip-shaped part (not shown in the figure), a first clamping part 512, and a second clamping part 513. The electrode, the first fitting part 521, and the connecting part 523 are the same as in the previous embodiment. The second fitting part 522 is hinged to the second clamping part 513, which can further reduce the risk of the buckle and the electrode falling off. Before assembly, the buckle and the electrode will not be separated from each other, preventing the buckle from being lost. Specifically, the second fitting part 522 circumferentially surrounds the second clamping part 513.

[0040] It should be noted that the above examples are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the skilled person in the art can still modify or equivalently replace the present application, and all technical solutions and improvements that do not deviate from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A heater comprising an electrode (1) and a clip (2), characterized in that, The electrode (1) comprises a strip portion (11), a first clamping portion (12) and a second clamping portion (13), the first clamping portion (12) is connected with the second clamping portion (13) through the strip portion (11); a first direction (X) and a second direction (Y) are defined, the second direction is perpendicular or approximately perpendicular to the first direction, the first clamping portion and the second clamping portion are arranged along the first direction (X); The buckle (2) comprises a first fitting portion (21), a second fitting portion (22) and a connecting portion (23), the first fitting portion (21) is connected with the second fitting portion (22) through the connecting portion (23); the first fitting portion (21) and the second fitting portion (22) are arranged along the first direction; the first fitting portion (21) is limitingly connected with the first clamping portion (12), and the second fitting portion (22) is limitingly connected with the second clamping portion (13); The buckle (2) further comprises a first limiting portion (25), along the second direction, the first limiting portion (25) is located on one side of the first clamping portion (12), and the connecting portion (23) is located on the other side of the first clamping portion (12); along the direction perpendicular to the second direction, the first limiting portion (25) is at least partially protruded relative to the first fitting portion (21); at least a part of the first limiting portion (25) can be projected on the first clamping portion along the second direction.

2. The heater of claim 1, wherein The connecting portion (23) has an elastic deformation portion (231), along the first direction (X), along the first direction, the first fitting portion (21) and the second fitting portion (22) are separated by a distance, and at least a part of the first clamping portion (12) and at least a part of the second clamping portion (13) are located between the first fitting portion and the second fitting portion; the first fitting portion (21) is at least partially in abutment with the first clamping portion (12), and the second fitting portion (22) is at least partially in abutment with the second clamping portion (13), so that the first fitting portion and the second fitting portion can clamp the first clamping portion (12) and the second clamping portion (13) along the first direction; the first clamping portion (12) and the second clamping portion (13) are separated by a distance; Alternatively, the second fitting portion is hinged with the second clamping portion.

3. The heater of claim 2, wherein The buckle (2) comprises a second limiting portion (26), the second limiting portion (26) is connected with the second fitting portion (22), along the second direction, the second limiting portion (26) is located on one side of the second clamping portion (13), and the connecting portion (23) is located on the other side of the second clamping portion (13); In the first direction, the second limiting part (26) protrudes towards the first engaging part (21) relative to the second engaging part (22), and the first limiting part (25) protrudes towards the second engaging part (22) relative to the first engaging part (21); a distance is provided between the first limiting part (25) and the second limiting part (26), and the buckle has an opening (24) between the first limiting part (25) and the second limiting part (26).

4. The heater of claim 3, wherein, The buckle (2) comprises a first guiding part (27) and a second guiding part (28); the first guiding part (27) is connected to the first limiting part (25), and the second guiding part (28) is connected to the second limiting part (26). In the second direction, the first guiding part (27) is away from the first engaging part (21) relative to the first limiting part (25), and the second guiding part (28) is away from the second engaging part (22) relative to the second limiting part (26); in the direction away from the first limiting part (25) and the second limiting part (26), the distance between the first guiding part (27) and the second guiding part (28) gradually increases, and the minimum distance between the first guiding part and the second guiding part is greater than the minimum distance between the first limiting part (25) and the second limiting part (26).

5. The heater of claim 2, wherein The connecting part is strip-shaped or belt-shaped, the elastically deformable part is bent or curved, and the elastically deformable part arches away from the first engaging part and the second engaging part; the radius of curvature of the elastically deformable part is smaller than that of other parts of the connecting part.

6. The heater of claim 3, wherein In the first direction, the first limiting part and the second limiting part protrude towards each other; in the first direction, the height (b) of the first limiting part protruding from the first engaging part is greater than the thickness (a) of the first engaging part; the top end of the first limiting part is arc-shaped, and the top end of the second limiting part is arc-shaped.

7. The heater according to any one of claims 1 to 6, wherein The first engaging part (21) is strip-shaped, and the second engaging part (22) is strip-shaped; the first engaging part (12) comprises a first groove (14), and the second engaging part (13) comprises a second groove (15); in the first direction, the first groove (14) and the second groove (15) open in opposite directions; the first groove (14) corresponds to the first engaging part (21), and the second groove (15) corresponds to the second engaging part (22); at least a part of the first engaging part (21) is located in the first groove (14), and at least a part of the second engaging part (22) is located in the second groove (15).

8. The heater of claim 7, wherein, The first fitting part (21) is a straight strip, the first fitting part (21) extends along the second direction, the second fitting part (22) is a straight strip, the second fitting part (22) extends along the second direction; the first groove (14) and the second groove (15) are straight grooves, the extension direction of the first groove (14) is the same as the extension direction of the first fitting part (21), and the extension direction of the second groove (15) is the same as the extension direction of the second fitting part (22).

9. The heater of claim 7, wherein, The first clamping part and the second clamping part are both columnar, the first fitting part has an arc, and the first fitting part arches away from the second fitting part; the second fitting part has an arc, and the second fitting part arches away from the first fitting part.

10. The heater according to any one of claims 1-9, wherein The first limiting part, the first fitting part, the second fitting part and the connecting part are integrally provided; the buckle is integrally formed by a metal wire or a metal strip; Alternatively, the buckle is integrally injection molded.

11. The heater according to any one of claims 1 to 9, wherein The heater further comprises a tube (3) and a heating film (4), the tube (3) has a flow channel (31), the heating film (4) is in contact with the outer peripheral part of the tube (3), the strip-shaped part (11) surrounds the tube (3), and at least a part of the strip-shaped part (11) is in contact with the heating film (4).

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