Heating pipe and water purifier comprising same

Abstract

The utility model provides a heating pipe and a water purifier comprising the same, and belongs to the technical field of heating equipment. The heating pipe comprises a pipe body, a heating piece, a first sealing piece and a connecting assembly. An accommodating space for accommodating the heating element and the heat-conducting medium is formed in the pipe body, the pipe body comprises a port communicated with the accommodating space, and the first sealing element is connected to the port in a sealing manner; the connecting assembly is connected with the pipe body, and the first sealing piece is arranged between the connecting assembly and the port in a pressed mode. The connecting assembly is used for connecting the heating pipe with heating equipment. The heat-conducting medium can be sealed in the pipe body through the first sealing piece, the first sealing piece can be tightly pressed at the port through the connecting assembly, and the situation that the heat-conducting medium leaks or is affected with damp due to the fact that the first sealing piece falls off is avoided, and due to the fact that the port is sealed and connected through the first sealing piece and the connecting assembly, welding is not needed; the possibility that the pipe body leaks water and is affected with damp due to sand holes existing in pipe body welding is avoided, then the situation that water in the pipe body expands due to heating and bursts the pipe body is avoided, and the risk of pipe explosion of the heating pipe is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment, in particular to a heating tube and a water purifier comprising the same. Background Art

[0002] As electric heating tubes become more and more popular and their use scenarios become more and more extensive, explosion accidents often occur in the market, which seriously affects the normal use of customers and brings safety hazards such as leakage. The main reason for the explosion is that there are sand holes in the welding part of the tube body, which causes the magnesium oxide powder inside the tube body to contain moisture due to moisture. Based on the principle of thermal expansion and contraction, when the electric heating tube is heated, the magnesium oxide powder begins to expand, bursting the tube body and causing a rupture accident. Therefore, the existing electric heating tubes have the defect of being easy to explode. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect that the heating tube in the prior art is easy to burst, and to provide a heating tube and a water purifier containing the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A heating tube comprises a tube body, a heating element, a first sealing element and a connecting assembly; the interior of the tube body has a accommodating space for accommodating the heating element and a heat-conducting medium, the tube body comprises a port communicating with the accommodating space, and the first sealing element is sealingly connected to the port; the connecting assembly is connected to the tube body, and the first sealing element is pressed between the connecting assembly and the port; the connecting assembly is used for connecting the heating tube to a heating device.

[0006] In this solution, the accommodation space inside the tube body is used to accommodate the heat-conducting medium and the heating element. By setting a first seal at the port of the tube body, the heat-conducting medium can be sealed in the tube body. The heat generated by the heating element is transferred to the tube body through the heat-conducting medium, thereby causing the heating tube to heat up. On the one hand, the provision of a connecting assembly can press the first seal against the port to prevent the first seal from falling off and causing leakage or moisture of the heat-conducting medium; on the other hand, the connecting assembly can also connect the heating tube to the heating device for easy installation. In addition, since this solution uses the first seal and the connecting assembly at the port of the tube body to seal the heat-conducting medium and connect the tube body, no welding is required, thus avoiding the possibility of sand holes in the tube body welding causing water leakage and moisture in the tube body, thereby preventing the water in the tube body from expanding due to heat and bursting the tube body, thereby effectively reducing the risk of the heating tube bursting from the root.

[0007] Preferably, the first seal includes a main body and an extension portion, the extension portion is connected to one end of the main body and forms a step surface with the main body; the outer peripheral wall of the main body is fitted and abutted against the inner peripheral wall of the port, and the extension portion is located on the outside of the port so that the step surface is fitted and abutted against the port.

[0008] In the present embodiment, the main body and the extension portion of the first seal form a step surface, so that when the main body is in abutment with the inner wall of the port, the step surface can also be in abutment with the port, thereby enhancing the sealing effect of the first seal; in addition, the extension portion is located on the outside of the port, which also facilitates the connection component and the port to clamp the extension portion together, so as to realize that the first seal is pressed between the connection component and the port.

[0009] Preferably, the connecting assembly includes a fastener, one end of which is provided with a receiving groove, the inner circumferential wall of the receiving groove is connected to the outer circumferential wall of the tube body; and the first sealing member is pressed between the bottom of the receiving groove and the port.

[0010] In this solution, a receiving groove is provided at one end of the fastener, and the inner peripheral wall of the receiving groove is connected to the outer peripheral wall of the tube body, so that the first sealing member can be firmly and stably pressed on the bottom of the receiving groove and will not fall off.

[0011] Preferably, the fastener has an abutment surface on a side away from the accommodating groove, the abutment surface is provided with a protrusion, and the protrusion has an external thread; the connecting assembly also includes a fastening nut, the fastening nut is threadedly connected to the protrusion, and a clamping space is formed between the fastening nut and the abutment surface.

[0012] In the present solution, through the above-mentioned structural form, the fastening nut can be detachably connected to the protrusion, and a clamping space is formed between the fastening nut and the abutment surface. In actual use, the protrusion on the abutment surface can be extended out of the mounting hole on the wall surface (or other mounting surface) of the heating device, and the fastening nut is tightened in the reverse direction so that the wall surface (or other mounting surface) of the heating device is clamped in the clamping space to realize the installation connection between the heating tube and the heating device.

[0013] Preferably, the connection assembly further comprises a sealing gasket, and the sealing gasket is arranged in the clamping space; the sealing gasket is provided with at least one protrusion on one side facing the fastening nut and / or the abutting surface.

[0014] In this solution, by arranging a sealing gasket in the clamping space, the fastening nut or the abutting surface can be sealed with the wall surface (or other mounting surface) of the heating device, making the connection tighter and preventing looseness. Protrusions are arranged on the sealing gasket to enhance the sealing effect of the sealing gasket, preventing burrs or grooves on the abutting surface of the fastening nut or the fastener from causing poor sealing and causing problems such as water leakage in the heating device.

[0015] Preferably, the first sealing member has a first through hole connecting the accommodating space and the external space, the heating member passes through the first through hole, and the heating member is interference fit with the first through hole; the connecting component is provided with a second through hole communicating with the first through hole, the heating member passes through the second through hole, so that the end of the heating member away from the accommodating space extends to the outside of the heating tube; the end of the heating member away from the accommodating space is connected to a power plug.

[0016] In this solution, through the above-mentioned structural form, the heating element sequentially passes through the first through hole and the second through hole from the accommodating space to the outside of the heating tube, and the end of the heating element away from the accommodating space is connected to a power plug, and the heating element can convert electrical energy into thermal energy to generate heat by connecting the power plug. The heating element and the first through hole have an interference fit, which can not only prevent the heat-conducting medium from leaking from the first through hole or moisture from entering the tube body from the first through hole, but also fix the heating element in the tube body through the first through hole of the first sealing member.

[0017] Preferably, the connecting assembly includes a fastener, a receiving groove is provided at one end of the fastener, the inner circumferential wall of the receiving groove is threadedly connected to the outer circumferential wall of the tube body, and the first seal is pressed between the bottom of the receiving groove and the port; the second through hole is provided on the fastener, and the second through hole passes through a side of the fastener facing the first seal and a side of the fastener facing away from the first seal; a second seal is provided between the heating element and the inner circumferential wall of the second through hole.

[0018] In this solution, a second seal is provided between the inner wall of the second through hole and the heating element to further enhance the sealing of the connection assembly, thereby preventing the first through hole and the heating element from losing the interference fit, thereby preventing the heat-conducting medium from leaking from the second through hole or moisture from entering the tube body from the second through hole.

[0019] Preferably, the heat-conducting medium is an insulating heat-conducting liquid.

[0020] In this solution, the method of filling the tube with magnesium oxide powder is abandoned, thereby avoiding the possibility of tube explosion due to the expansion of magnesium oxide powder due to moisture; and the insulating thermal transfer fluid has a high ignition point and has good fire resistance and insulation properties. Even if a fire accident occurs, the flame can be prevented from being transmitted through the insulating thermal transfer fluid, thereby enhancing the safety of the heating tube.

[0021] Preferably, the outer periphery of the heating element is provided with fins, and the fins are spirally wrapped around the circumference of the heating element;

[0022] and / or, the tube body comprises two ports;

[0023] And / or, the tube body is in a "U" shape.

[0024] In this solution, fins are spirally arranged around the heating element to increase the heating area of ​​the heating element, thereby achieving the purpose of rapid temperature rise. The pipe body is provided with two ports to increase the connectivity of the pipe body, which is convenient for installation, maintenance and replacement; further, the pipe body is "U" shaped, which ensures the length of the pipe body while reducing the occupied area.

[0025] A water purifier comprises the heating tube as described above.

[0026] The positive and progressive effects of the utility model are:

[0027] In the present invention, the accommodation space inside the tube body is used to accommodate the heat-conducting medium and the heating element. By setting a first seal at the port of the tube body, the heat-conducting medium can be sealed in the tube body. The heat generated by the heating element is transferred to the tube body through the heat-conducting medium, thereby causing the heating tube to heat up. On the one hand, the provision of a connecting assembly can press the first seal against the port to prevent the first seal from falling off and causing leakage or moisture of the heat-conducting medium; on the other hand, the connecting assembly can also connect the heating tube to the heating device for easy installation. In addition, since the present solution achieves sealing of the heat-conducting medium and connection of the tube body at the port of the tube body through the first seal and the connecting assembly, no welding is required, thus avoiding the possibility of sand holes in the tube body welding causing water leakage and moisture in the tube body, thereby preventing the water in the tube body from expanding due to heat and bursting the tube body, thereby effectively reducing the risk of the heating tube bursting from the root. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the heating tube according to a preferred embodiment of the utility model.

[0029] Figure 2 This is a schematic diagram of the partial exploded structure of the heating tube of a preferred embodiment of the utility model.

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting assembly in the heating tube of the preferred embodiment of the utility model.

[0031] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the heating tube of the preferred embodiment of the utility model.

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the first sealing member in the heating tube of a preferred embodiment of the utility model.

[0033] Figure 6 The figure is a schematic diagram of the three-dimensional structure of the fastener in the heating tube according to the preferred embodiment of the utility model.

[0034] Figure 7 The figure is a schematic diagram of the three-dimensional structure of the sealing pad in the heating tube according to the preferred embodiment of the utility model.

[0035] Description of reference numerals:

[0036] Tube body 100

[0037] Accommodation space 110

[0038] Port 120

[0039] Heating element 200

[0040] Fin 210

[0041] Power plug 220

[0042] First seal 300

[0043] Ontology 310

[0044] Extension 320

[0045] Step surface 330

[0046] First through hole 340

[0047] Connection Kit 400

[0048] Fastener 410

[0049] Accommodating groove 411

[0050] Abutment surface 412

[0051] Protrusion 413

[0052] Second through hole 414

[0053] Second sealing member 420

[0054] Fastening nut 430

[0055] Gasket 440

[0056] Bump 441 DETAILED DESCRIPTION

[0057] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0058] like Figure 1-Figure 4 As shown, this embodiment provides a heating tube, which includes a tube body 100, a heating element 200, a first sealing element 300 and a connecting assembly 400; the interior of the tube body 100 has a accommodating space 110 for accommodating the heating element 200 and a heat-conducting medium, the tube body 100 includes a port 120 connected to the accommodating space 110, and the first sealing element 300 is sealed and connected to the port 120; the connecting assembly 400 is connected to the tube body 100, and the first sealing element 300 is pressed between the connecting assembly 400 and the port 120; the connecting assembly 400 is used for connecting the heating tube to a heating device.

[0059] The accommodation space 110 inside the tube body 100 is used to accommodate the heat-conducting medium and the heating element 200. By setting the first sealing member 300 at the port 120 of the tube body 100, the heat-conducting medium can be sealed in the tube body 100. The heat generated by the heating element 200 is transferred to the tube body 100 through the heat-conducting medium, thereby causing the heating tube to heat up. The connection assembly 400 can, on the one hand, press the first sealing member 300 against the port 120 to prevent the first sealing member 300 from falling off and causing the heat-conducting medium to leak or get wet; on the other hand, the connection assembly 400 can also connect the heating tube to the heating device for easy installation. In addition, since the present solution realizes sealing of the heat-conducting medium and connection of the tube body 100 at the port 120 of the tube body 100 through the first seal 300 and the connecting assembly 400, no welding is required, thereby avoiding the possibility of sand holes in the welding of the tube body 100 causing water leakage and moisture in the tube body 100, thereby avoiding the water in the tube body 100 from expanding due to heat and bursting the tube body 100, thereby effectively reducing the risk of explosion of the heating tube from the root.

[0060] Specifically, Figure 5 As shown, the first seal 300 includes a main body 310 and an extension portion 320, the extension portion 320 is connected to one end of the main body 310, and forms a step surface 330 with the main body 310; the outer peripheral wall of the main body 310 is fitted and abutted against the inner peripheral wall of the port 120, and the extension portion 320 is located on the outer side of the port 120 so that the step surface 330 is fitted and abutted against the port 120.

[0061] The main body 310 and the extension portion 320 in the first seal 300 form a step surface 330, so that when the main body 310 is in contact with the inner wall of the port 120, the step surface 330 can also be in contact with the port 120, thereby enhancing the sealing effect of the first seal 300; in addition, the extension portion 320 is located on the outside of the port 120, which also facilitates the connection component 400 and the port 120 to clamp the extension portion 320 together, so as to realize that the first seal 300 is pressed between the connection component 400 and the port 120.

[0062] Specifically, Figure 6 As shown, the connection assembly 400 includes a fastener 410 , one end of which is provided with a receiving groove 411 , the inner wall of the receiving groove 411 is connected to the outer wall of the tube body 100 ; the first sealing member 300 is pressed between the bottom of the receiving groove 411 and the port 120 .

[0063] One end of the fastener 410 is provided with a receiving groove 411, and the inner peripheral wall of the receiving groove 411 is connected to the outer peripheral wall of the tube body 100, so that the first sealing member 300 can be firmly and stably pressed on the bottom of the receiving groove 411 without falling off.

[0064] In this embodiment, an internal thread is selected to be provided on the inner peripheral wall of the receiving groove 411, and an external thread is selected to be provided on the outer peripheral wall of the tube body 100, so that the inner peripheral wall of the receiving groove 411 is threadedly connected with the outer peripheral wall of the tube body 100, which can ensure the tightness of the connection and facilitate disassembly. In other optional embodiments, buckles and slots can also be selected to be provided on the inner peripheral wall of the receiving groove 411 and the outer peripheral wall of the tube body 100, respectively, so that the fastener 410 is snap-connected with the tube body 100; of course, if conditions permit, other existing connection methods can also be selected.

[0065] Furthermore, the fastener 410 has an abutment surface 412 on one side away from the accommodating groove 411, and a protrusion 413 is provided on the abutment surface 412, and the protrusion 413 has an external thread; the connecting assembly 400 also includes a fastening nut 430, which is threadedly connected to the protrusion 413, and a clamping space is formed between the fastening nut 430 and the abutment surface 412.

[0066] Through the above-mentioned structural form, the fastening nut 430 can be detachably connected with the protrusion 413, and a clamping space is formed between the fastening nut 430 and the abutment surface 412. In actual use, the protrusion 413 on the abutment surface 412 can be extended out of the mounting hole on the wall surface (or other mounting surface) of the heating device, and the fastening nut 430 can be tightened on the other side so that the wall surface (or other mounting surface) of the heating device is clamped in the clamping space to realize the installation connection between the heating tube and the heating device.

[0067] In this embodiment, one side of the fastener 410 has an internal thread and the other side has an external thread, and a double-headed screw in the prior art can be selected as the fastener 410; in other optional implementations, the fastener 410 that meets the above description can also be customized and assembled.

[0068] Furthermore, the connection assembly 400 further includes a sealing gasket 440 , which is disposed in the clamping space; the sealing gasket 440 is provided with at least one protrusion 441 on one side facing the fastening nut 430 and / or the abutting surface 412 .

[0069] By providing a sealing gasket 440 in the clamping space, the fastening nut 430 or the abutting surface 412 can be sealed with the wall surface (or other mounting surface) of the heating device, making the connection tighter and preventing looseness. Protrusions 441 are provided on the sealing gasket 440 to enhance the sealing effect of the sealing gasket 440, preventing burrs or grooves on the abutting surface 412 of the fastening nut 430 or the fastener 410 from causing poor sealing and causing problems such as water leakage in the heating device.

[0070] like Figure 7As shown, in this embodiment, protrusions 441 are provided on both sides of the sealing gasket 440 (the side facing the fastening nut 430 and the side facing the abutting surface 412), and the protrusions 441 are annular and there are two of them to increase the sealing effect of the protrusions 441. In other optional embodiments, the protrusions 441 may be provided only on one side of the sealing gasket 440, and the number and specific shape of the protrusions 441 may be different from the present embodiment according to actual needs.

[0071] like Figure 4 and Figure 5 As shown, the first sealing member 300 has a first through hole 340 connecting the accommodating space 110 and the external space, the heating member 200 passes through the first through hole 340, and the heating member 200 is interference fit with the first through hole 340; the connecting component 400 has a second through hole 414 connected to the first through hole 340, the heating member 200 passes through the second through hole 414, so that the end of the heating member 200 away from the accommodating space 110 extends to the outside of the heating tube; the end of the heating member 200 away from the accommodating space 110 is connected to the power plug 220.

[0072] Thus, the heating element 200 sequentially passes through the first through hole 340 and the second through hole 414 from the accommodating space 110 to the outside of the heating tube, and the end of the heating element 200 away from the accommodating space 110 is connected to the power plug 220, and the heating element 200 can convert electrical energy into thermal energy to generate heat by connecting to the power plug 220. The heating element 200 and the first through hole 340 are interference-fitted, which can prevent the heat-conducting medium from leaking from the first through hole 340 or moisture from entering the tube body 100 from the first through hole 340, and can also fix the heating element 200 in the tube body 100 through the first through hole 340 of the first sealing member 300.

[0073] Specifically, the second through hole 414 is opened on the fastener 410 , and the second through hole 414 passes through the side of the fastener 410 facing the first seal 300 and the side of the fastener 410 away from the first seal 300 ; the second seal 420 is arranged between the heating element 200 and the inner peripheral wall of the second through hole 414 .

[0074] like Figure 4 As shown, in this embodiment, the second through hole 414 is directly opposite to the first through hole 340, and one end of the second through hole 414 is connected to the bottom of the accommodating groove 411, and the other end extends to the end of the protrusion 413, so that the heating element 200 can pass straight out of the accommodating space 110. By arranging the second sealing member 420 between the inner peripheral wall of the second through hole 414 and the heating element 200, the sealing performance of the connecting assembly 400 is further enhanced, and the first through hole 340 and the heating element 200 are prevented from losing the interference fit, resulting in leakage of the heat-conducting medium from the second through hole 414 or water from entering the tube body 100 from the second through hole 414.

[0075] In this embodiment, the first seal 300 is made of a high temperature resistant rubber material, which is elastic and easy to form an interference fit with the port 120 and the heating element 200 to ensure sealing; the second seal 420 is made of epoxy resin. After the connection component 400 is assembled, the epoxy resin is poured between the second through hole 414 and the heating element 200. After curing, a seal can be formed with good performance. Of course, the sealing gasket 440 can also be made of a high temperature resistant rubber material. In other optional embodiments, the specific manufacturing materials of the first seal 300, the second seal 420 and the sealing gasket 440 can be selected from other materials in the prior art that are different from the present embodiment according to actual needs.

[0076] In this embodiment, only one structural form of the connection component 400 is schematically described. It can be understood that in practice, the specific structure of the connection component 400 is not limited to this. In other optional embodiments, the connection component 400 can also be set to other structures, which can press the first seal 300 to the port 120, can be connected to the heating equipment, and meet the necessary assembly conditions.

[0077] In this embodiment, the heat conducting medium is an insulating heat conducting liquid.

[0078] Specifically, the insulating thermal liquid can be an ester insulating liquid, which has a high ignition point, good fire resistance and insulation. Even if a fire accident occurs, the flame can be prevented from being transmitted through the insulating thermal liquid, thereby enhancing the safety of the heating tube. In addition, since the form of filling the tube body 100 with magnesium oxide powder is abandoned, this embodiment can effectively avoid the possibility of the magnesium oxide powder in the tube body 100 swelling due to moisture and causing the tube to burst.

[0079] It should be noted that the insulating thermal liquid is not limited to ester insulating liquids, and in other optional embodiments, the insulating thermal liquid may also be any existing liquid medium that is heat-conducting and insulating. In addition, under the premise that the first seal 300 and the connecting assembly 400 can achieve sealing of the thermal medium, in other optional embodiments, the thermal medium may also be magnesium oxide powder.

[0080] Furthermore, if Figure 4 As shown, the outer periphery of the heating element 200 is provided with fins 210, and the fins 210 are spirally wound around the circumference of the heating element 200. By spirally arranging the fins 210 around the circumference of the heating element 200, the heating area of ​​the heating element 200 is increased, so as to achieve the purpose of rapid temperature rise.

[0081] In addition, if Figure 1 As shown, in this embodiment, the tube body 100 includes two ports 120, and the tube body 100 is "U"-shaped.

[0082] The pipe body 100 is provided with two ports 120 to increase the connectivity of the pipe body 100 and facilitate installation, maintenance and replacement; and in this embodiment, the two ports 120 are connected to the heating element 200, the first sealing element 300 and the connecting assembly 400. Furthermore, the pipe body 100 is "U"-shaped, which reduces the occupied area while ensuring the length of the pipe body 100.

[0083] In this embodiment, the pipe body 100 is made of a seamless metal pipe. The seamless pipe can avoid the occurrence of leakage caused by water seepage due to poor welding, and the metal pipe is convenient for setting threads on the port 120.

[0084] In other optional embodiments, the tube body 100 may also be configured to be a straight line or other shapes, and the number of the ports 120 may also be adjusted to one or other numbers.

[0085] In addition, this embodiment provides a water purifier, which includes the heating tube as described above.

[0086] That is, the heating device is a water purifier in this embodiment. It can be understood that the heating tube, as a relatively independent device, can be adapted to other heating devices, such as a water dispenser or a water heater, etc.

[0087] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A heating tube, characterized in that: It includes a pipe body, a heating element, a first sealing element and a connecting assembly; The interior of the tube body has an accommodating space for accommodating the heating element and the heat-conducting medium, the tube body includes a port communicating with the accommodating space, and the first sealing element is sealingly connected to the port; The connecting assembly is connected to the pipe body, and the first sealing member is pressed between the connecting assembly and the port; The connecting assembly is used for connecting the heating pipe to a heating device.

2. The heating tube according to claim 1, characterized in that: The first sealing member comprises a body and an extension portion, wherein the extension portion is connected to one end of the body and forms a step surface with the body; The outer peripheral wall of the body is in contact with the inner peripheral wall of the port, and the extension portion is located outside the port so that the step surface is in contact with the port.

3. The heating tube according to claim 1, characterized in that: The connecting assembly includes a fastener, one end of which is provided with a receiving groove, and the inner peripheral wall of the receiving groove is connected to the outer peripheral wall of the tube body; The first sealing member is pressed between the bottom of the accommodating groove and the port.

4. The heating tube according to claim 3, characterized in that: The fastener has an abutting surface on one side away from the receiving groove, and a protrusion is provided on the abutting surface, and the protrusion has an external thread; The connection assembly also includes a fastening nut, which is threadedly connected to the protruding portion, and a clamping space is formed between the fastening nut and the abutting surface.

5. The heating tube according to claim 4, characterized in that: The connection assembly further comprises a sealing gasket, which is arranged in the clamping space; The sealing gasket is provided with at least one protrusion on a side facing the fastening nut and / or the abutting surface.

6. The heating tube according to claim 1, characterized in that: The first sealing member has a first through hole communicating with the accommodating space and the external space, the heating member passes through the first through hole, and the heating member is interference-fitted with the first through hole; The connecting assembly is provided with a second through hole communicating with the first through hole, and the heating element passes through the second through hole, so that the end of the heating element away from the accommodating space extends to the outside of the heating tube; One end of the heating element away from the accommodating space is connected with a power plug.

7. The heating tube according to claim 6, characterized in that: The connecting assembly includes a fastener, one end of which is provided with a receiving groove, the inner peripheral wall of the receiving groove is threadedly connected to the outer peripheral wall of the tube body, and the first sealing member is pressed between the groove bottom of the receiving groove and the port; The second through hole is opened on the fastener, and the second through hole passes through a side of the fastener facing the first sealing member and a side of the fastener facing away from the first sealing member; A second sealing member is arranged between the heating member and the inner peripheral wall of the second through hole.

8. The heating tube according to claim 1, characterized in that: The heat conducting medium is an insulating heat conducting liquid.

9. The heating tube according to claim 1, characterized in that: The outer periphery of the heating element is provided with fins, and the fins are spirally wrapped around the circumference of the heating element; and / or, the tube body comprises two ports; And / or, the tube body is "U" shaped.

10. A water purifier, characterized in that: It comprises the heating tube as claimed in any one of claims 1 to 9.

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