A heating tube and a heating device

Abstract

The application discloses a heating pipe, comprising: a hollow pipe body, a side wall of the hollow pipe body being provided with a heating circuit; a water inlet end cover which is an integrally-formed metal thin-wall part, one end of the water inlet end cover being a cover part and the other end being a pipe part, the cover part of the water inlet end cover being connected to a first end of the hollow pipe body through a welding process; and a water outlet end cover which is an integrally-formed metal thin-wall part, one end of the water outlet end cover being a cover part and the other end being a pipe part, the cover part of the water outlet end cover being connected to a second end of the hollow pipe body through a welding process. The heating pipe has simple structure and is convenient to process, and the water inlet end cover and the water outlet end cover are both integrally-formed metal thin-wall parts, so that an end plate does not need to be additionally welded.

Description

Technical Field

[0001] This utility model relates to the field of liquid heating technology, specifically to a heating tube and a heating device. Background Technology

[0002] With the rapid development of thick film heating technology, it has become increasingly mature and its application scenarios are becoming more and more widespread. To facilitate the use of thick film heaters, thick film heating tubes and auxiliary equipment are usually integrated into a module. For example, patent document CN 223106288 U discloses a metal end cap heating body, including a heating tube with metal end caps welded to both ends. A central guide column is set between the two metal end caps, and spiral guide components are set between the two ends of the central guide column and the metal end caps. Each metal end cap has an end plate, and a mounting shell is set between the two end plates. Each end plate is connected to the mounting shell by screws. The mounting shell has a temperature control switch to protect the heating tube. Through the guidance of the central guide column, the liquid can be heated quickly, resulting in better heating effect.

[0003] The heating tube in the aforementioned patent document has a complex hardware end cap structure, and both hardware end caps require additional welding of end plates, which is cumbersome and costly to process. Utility Model Content

[0004] This invention addresses the aforementioned problems by providing a heating tube and a heating device.

[0005] The technical solution adopted by this utility model is as follows: A heating element, comprising: The hollow tube has heating circuitry on its sidewalls. The water inlet end cap is a one-piece molded thin-walled metal part. One end of the water inlet end cap is the cap part, and the other end is the pipe part. The cap part of the water inlet end cap is connected to the first end of the hollow pipe body by welding process. The water outlet cap is a one-piece molded thin-walled metal part. One end of the water outlet cap is the cap part, and the other end is the pipe part. The cap part of the water outlet cap is connected to the second end of the hollow pipe body by welding.

[0006] The heating tube of this application has a simple structure and is easy to process. Both the inlet end cap and the outlet end cap are integrally formed thin-walled metal parts, and no additional end plates need to be welded.

[0007] In practical applications, the inlet and outlet caps can be made of stainless steel.

[0008] In one embodiment of the present invention, the water outlet cap has a detection hole, and the heating tube further includes a detection tube welded to the water outlet cap corresponding to the position of the detection hole. The detection tube is used to install a temperature sensor that extends into the detection hole.

[0009] By setting up a detection hole and a detection tube, a temperature sensor can be inserted into the water outlet cap, thereby accurately measuring the temperature of the liquid at the water outlet cap, i.e., the liquid temperature at the outlet.

[0010] The liquid referred to in this application may be water or other liquid substances.

[0011] In one embodiment of this utility model, the tube is a tubular quick-connect connector; The outlet cap also has an intermediate section between the cap portion and the pipe portion, and the detection hole is located in the intermediate section.

[0012] Setting up a middle section allows for the creation of additional space to install detection holes and detection tubes.

[0013] This application also discloses a heating device, comprising: Heating element, wherein the heating element is the heating element described above; The central tube is located inside the heating tube and between the inlet end cap and the outlet end cap; A spiral flow guide is installed between the central tube and the heating tube to form a spiral flow channel; The outer casing is fitted over the heating element.

[0014] In one embodiment of the present invention, the end of the outer shell has a limiting flange. The limiting flange at one end of the outer shell cooperates with the cover of the water inlet end cap, and the limiting flange at the other end of the outer shell cooperates with the cover of the water outlet end cap. The limiting flanges at both ends of the outer shell are used to limit the outer shell to the heating tube in the axial direction.

[0015] Axial positioning can be achieved through the limiting mechanism, eliminating the need for additional welding of end plates. The entire structure is simple and easy to assemble.

[0016] In one embodiment of the present invention, the heating device further includes an electrode, one end of which is welded to the heating circuit of the hollow tube. The electrode has a first positioning part, and the outer shell has a second positioning part. The first positioning part and the second positioning part are positioned and cooperate with each other, wherein the second positioning part is a baffle structure.

[0017] By setting the first positioning part and the second positioning part, the electrode can be reliably fixed, and the circumferential position of the outer shell is also limited to a certain extent.

[0018] In one embodiment of this utility model, the spiral guide is a spring that is sleeved on the outer wall of the central tube.

[0019] In one embodiment of the present invention, the end of the central tube facing the water inlet cap is closed, and the end of the central tube facing the water outlet cap has an opening.

[0020] The end of the central tube corresponding to the outlet cap has an opening. This design allows the liquid entering the central tube to expand after heating and exit through the opening into the outlet cap. Without an opening, if the sealing structure fails and liquid enters the central tube but cannot exit, it can easily lead to odor problems.

[0021] In one embodiment of this utility model, the central tube includes: Supervisory body; The first end is located at one end of the main body facing the water inlet end cap. The first end has a sealing part that cooperates with the end of the main body and a flow passage located on the outside of the main body that cooperates with the water inlet end cap. The side wall of the flow passage of the first end has a flow passage hole, through which liquid from the water inlet end cap flows into the spiral flow channel. The second end is located at the end of the main pipe facing the outlet end cap. The second end has a sealing part that cooperates with the end of the main pipe and a flow passage part located on the outside of the main pipe that cooperates with the outlet end cap. The side wall of the flow passage part of the second end has a flow passage hole. The sealing part of the second end has the opening that communicates with the internal space of the main pipe. Liquid from the spiral flow channel can enter the outlet end cap and the main pipe through the flow passage hole.

[0022] In one embodiment of the present invention, a temperature sensor extending into the detection hole is sealed and installed inside the detection tube; The outer casing is also equipped with a temperature controller for detecting the temperature of the hollow tube.

[0023] A sealing ring can be installed between the temperature sensor and the detection tube to achieve a sealed installation.

[0024] The beneficial effects of this utility model are: the heating tube structure of this application is simple and easy to process. The water inlet end cap and the water outlet end cap are both integrally formed thin-walled metal parts, and there is no need to weld end plates separately. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the heating element; Figure 2 This is an exploded view of the heating element; Figure 3 This is a schematic diagram of the heating device; Figure 4 This is a top view of the heating element, the central tube, and the spiral guide. Figure 5 yes Figure 4 Sectional view of AA; Figure 6 This is a top view of the heating device; Figure 7 yes Figure 6BB section view; Figure 8 It is an exploded view of the heating tube, the central tube, and the spiral guide.

[0026] The labels for the attached figures are as follows: 1. Heating tube; 11. Hollow tube body; 111. Heating circuit; 12. Inlet cap; 121. Cap; 122. Tube; 13. Outlet cap; 131. Middle part; 132. Detection hole; 14. Detection tube; 2. Central tube; 21. Main tube body; 22. First end; 221. Sealing part; 222. Flow passage part; 2221. Flow passage hole; 23. Second end; 231. Opening; 3. Spiral guide; 31. Spiral flow channel; 4. Outer shell; 41. Limiting flange; 42. Second positioning part; 5. Electrode; 51. First positioning part; 6. Temperature sensor; 7. Thermostat. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figures 1-8 As shown, this embodiment discloses a heating device. The heating device includes a heating tube 1. As... Figure 1 and2 As shown, the heating element 1 in this embodiment includes: Hollow tube 11, the side wall of hollow tube 11 has heating circuit 111; The water inlet end cap 12 is a one-piece molded thin-walled metal part. One end of the water inlet end cap 12 is the cap part 121, and the other end is the pipe part 122. The cap part 121 of the water inlet end cap 12 is connected to the first end of the hollow pipe body 11 by welding process. The water outlet cap 13 is a one-piece molded thin-walled metal part. One end of the water outlet cap 13 is a cap 121 and the other end is a pipe 122. The cap 121 of the water outlet cap 13 is connected to the second end of the hollow pipe body 11 by welding.

[0032] The heating tube 1 of this application has a simple structure and is easy to process. The inlet end cap 12 and the outlet end cap 13 are both integrally formed thin-walled metal parts, and no additional end plates need to be welded.

[0033] In practical applications, the inlet cap 12 and the outlet cap 13 can be made of stainless steel.

[0034] like Figure 1 , 2 As shown in Figure 7, in this embodiment, the water outlet cap 13 has a detection hole 132, and the heating tube 1 also includes a detection tube 14 welded to the water outlet cap 13 corresponding to the position of the detection hole 132. The detection tube 14 is used to install a temperature sensor 6 that extends into the detection hole 132.

[0035] By setting the detection hole 132 and the detection tube 14, the temperature sensor 6 can be inserted into the water outlet cover 13, so that the temperature of the liquid at the water outlet cover 13, that is, the temperature of the liquid at the outlet, can be accurately measured.

[0036] The liquid referred to in this application may be water or other liquid substances.

[0037] As shown in Figure 2, in this embodiment, the tube 122 is a tubular quick-connect fitting; The outlet cap 13 also has an intermediate portion 131 between the cap portion 121 and the pipe portion 122, and the detection hole 132 is located in the intermediate portion 131.

[0038] The middle section 131 is designed to provide space for setting up the detection hole 132 and the detection tube 14.

[0039] like Figure 3 , 4 As shown in 5, 6 and 7, the heating device in this embodiment further includes: Heating element 1, which is the same as the heating element 1 mentioned above; The central tube 2 is located inside the heating tube 1 and between the inlet end cap 12 and the outlet end cap 13; A spiral guide element 3 is disposed between the central tube 2 and the heating tube 1 to form a spiral flow channel 31. The outer casing 4 is wrapped around the heating tube 1.

[0040] like Figure 3 and 7 As shown, in this embodiment, the end of the outer shell 4 has a limiting flange 41. The limiting flange 41 at one end of the outer shell 4 cooperates with the cover portion 121 of the water inlet end cap 12, and the limiting flange 41 at the other end of the outer shell 4 cooperates with the cover portion 121 of the water outlet end cap 13. The limiting flanges 41 at both ends of the outer shell 4 are used to limit the outer shell 4 axially to the heating tube 1.

[0041] Axial positioning can be achieved through the limiting mechanism, eliminating the need for additional welding of end plates. The entire structure is simple and easy to assemble.

[0042] like Figure 3 As shown, in this embodiment, the heating device further includes an electrode 5, one end of which is welded to the heating circuit 111 of the hollow tube 11. The electrode 5 has a first positioning part 51, and the outer shell 4 has a second positioning part 42. The first positioning part 51 and the second positioning part 42 are positioned and cooperate with each other, wherein the second positioning part 42 is a baffle structure.

[0043] By setting the first positioning part 51 and the second positioning part 42, the electrode 5 can be reliably fixed, and the circumferential position of the outer shell 4 is also limited to a certain extent.

[0044] like Figure 5 , 7 As shown in Figure 8, in this embodiment, the spiral guide 3 is a spring that is sleeved on the outer wall of the central tube 2.

[0045] like Figure 5 and 7 As shown, in this embodiment, the end of the central tube 2 facing the water inlet cap 12 is closed, and the end of the central tube 2 facing the water outlet cap 13 is closed and has an opening 231.

[0046] The end of the central tube 2 corresponding to the outlet cap 13 has an opening 231. With this design, the liquid entering the central tube 2 expands after heating and can exit through the opening 231 into the outlet cap 13. If there is no opening 231, and the sealing structure fails, causing the liquid to enter the central tube 2 and not exit, an odor problem may easily occur.

[0047] like Figure 5 and 8 As shown, in this embodiment, the central tube 2 includes: Supervisory Body 21; The first end 22 is located at the end of the main body 21 facing the water inlet end cap 12. The first end 22 has a sealing part 221 that cooperates with the end of the main body 21 and a flow passage 222 located outside the main body 21 that cooperates with the water inlet end cap 12. The side wall of the flow passage 222 of the first end 22 has a flow passage hole 2221. Liquid from the water inlet end cap 12 flows into the spiral flow channel 31 through the flow passage hole 2221. The second end 23 is located at the end of the main body 21 facing the outlet end cap 13. The second end 23 has a sealing part 221 that cooperates with the end of the main body 21 and a flow passage 222 located outside the main body 21 that cooperates with the outlet end cap 13. The side wall of the flow passage 222 of the second end 23 has a flow passage hole 2221. The sealing part 221 of the second end 23 has an opening 231 that communicates with the internal space of the main body 21. Liquid from the spiral flow channel 31 can enter the outlet end cap 13 and the main body 21 through the flow passage hole 2221.

[0048] like Figure 7 As shown, in this embodiment, a temperature sensor 6 extending into the detection hole 132 is sealed and installed inside the detection tube 14; a temperature controller 7 for detecting the temperature of the hollow tube 11 is also installed on the outer casing 4. In actual use, a sealing ring can be provided between the temperature sensor 6 and the detection tube 14 to achieve a sealed installation.

[0049] The above description is only a preferred embodiment of the present utility model and does not limit the scope of patent protection of the present utility model. Any equivalent structural transformations made based on the content of the present utility model specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present utility model.

Claims

1. A heating element, characterized in that, include: The hollow tube has heating circuitry on its sidewalls. The water inlet end cap is a one-piece molded thin-walled metal part. One end of the water inlet end cap is the cap part, and the other end is the pipe part. The cap part of the water inlet end cap is connected to the first end of the hollow pipe body by welding process. The water outlet cap is a one-piece molded thin-walled metal part. One end of the water outlet cap is the cap part, and the other end is the pipe part. The cap part of the water outlet cap is connected to the second end of the hollow pipe body by welding.

2. The heating tube as described in claim 1, characterized in that, The water outlet cap has a detection hole, and the heating tube also includes a detection tube welded to the water outlet cap corresponding to the position of the detection hole. The detection tube is used to install a temperature sensor that extends into the detection hole.

3. The heating tube as described in claim 2, characterized in that, The tube is a tubular quick-connect fitting; The outlet cap also has an intermediate section between the cap portion and the pipe portion, and the detection hole is located in the intermediate section.

4. A heating device, characterized in that, include: A heating element, wherein the heating element is the heating element as described in claim 2 or 3; The central tube is located inside the heating tube and between the inlet end cap and the outlet end cap; A spiral flow guide is installed between the central tube and the heating tube to form a spiral flow channel; The outer casing is fitted over the heating element.

5. The heating device as described in claim 4, characterized in that, The end of the outer shell has a limiting flange. The limiting flange at one end of the outer shell cooperates with the cover of the water inlet end cap, and the limiting flange at the other end of the outer shell cooperates with the cover of the water outlet end cap. The limiting flanges at both ends of the outer shell are used to limit the outer shell to the heating tube in the axial direction.

6. The heating device as described in claim 4, characterized in that, The heating device also includes an electrode, one end of which is welded to the heating circuit of the hollow tube. The electrode has a first positioning part, and the outer shell has a second positioning part. The first positioning part and the second positioning part are positioned and cooperate with each other, wherein the second positioning part is a baffle structure.

7. The heating device as described in claim 4, characterized in that, The spiral guide is a spring that is sleeved on the outer wall of the central tube.

8. The heating device as described in claim 4, characterized in that, The end of the central tube facing the water inlet cap is closed, and the end of the central tube facing the water outlet cap is closed and has an opening.

9. The heating device as described in claim 8, characterized in that, The central tube includes: Supervisory body; The first end is located at one end of the main body facing the water inlet end cap. The first end has a sealing part that cooperates with the end of the main body and a flow passage located on the outside of the main body that cooperates with the water inlet end cap. The side wall of the flow passage of the first end has a flow passage hole, through which liquid from the water inlet end cap flows into the spiral flow channel. The second end is located at the end of the main pipe facing the outlet end cap. The second end has a sealing part that cooperates with the end of the main pipe and a flow passage part located on the outside of the main pipe that cooperates with the outlet end cap. The side wall of the flow passage part of the second end has a flow passage hole. The sealing part of the second end has the opening that communicates with the internal space of the main pipe. Liquid from the spiral flow channel can enter the outlet end cap and the main pipe through the flow passage hole.

10. The heating device as described in claim 4, characterized in that, A temperature sensor that extends into the detection hole is sealed and installed inside the detection tube; The outer casing is also equipped with a temperature controller for detecting the temperature of the hollow tube.

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