Autonomous descaling heating device
By using the independent descaling and heating device to utilize the thermal expansion and contraction characteristics of carbon fiber electric heating tubes and metal tubes, the problems of reduced heat conduction efficiency and maintenance difficulties caused by scale accumulation are solved, achieving the effects of efficient heating and long life.
Patent Information
- Application Number
- CN202520048724.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2035-01-09
AI Technical Summary
During use, existing heating devices may suffer from reduced heat conduction efficiency and possible corrosion of the electric heating tubes due to scale accumulation. Descaling requires disassembly, which is time-consuming and labor-intensive, resulting in high maintenance costs.
An autonomous descaling and heating device is designed. It utilizes the thermal expansion and contraction characteristics of carbon fiber electric heating tubes and metal tubes. The carbon fiber electric heating tubes are energized and heated to cause scale on the surface of the metal tube to automatically fall off during the thermal expansion and contraction process, thus achieving descaling without disassembly.
It achieves efficient heat conduction for a long time, high heating efficiency, long service life and reduced maintenance costs.
Smart Images
Figure CN223448655U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to heating device, in particular to a kind of self descaling heating device. BACKGROUND
[0002] At present, the electric heating rod, heating pipe and other various heating devices of various electric water heaters can produce scale of different degrees on the surface of electric heating pipe after a period of use. Since scale is a poor conductor of heat, a large amount of scale accumulation can reduce the heating conduction efficiency and possibly corrode the electric heating pipe, shorten the service life of the electric heating pipe and increase the maintenance cost. If descaling can only be done manually after the heating pipe is removed, it is not only time-consuming and laborious, but also requires professional personnel to complete, with high maintenance cost. SUMMARY
[0003] The utility model solves the technical problem to provide a kind of self descaling heating device without disassembly, which can remove scale and rust spots, maintain high-efficiency heat conduction for a long time and has long service life.
[0004] To solve the above problems, the utility model adopts the following technical scheme:
[0005] A kind of self descaling heating device, comprising a shell, and the special feature is that: metal pipe is arranged in the shell, an annular heating cavity is formed between the shell and the metal pipe, one end of the metal pipe is closed and suspended in the shell, the other end of the metal pipe passes through the flange plate arranged at the corresponding end of the shell and is sealed and welded with the shell by the flange plate, water inlet and water outlet are arranged at both ends of the shell respectively for external connection of water inlet pipe and water outlet pipe;
[0006] Carbon fiber electric heating pipe is arranged in the metal pipe, insulating supports are respectively inserted into both ends of the carbon fiber electric heating pipe, the carbon fiber electric heating pipe is supported concentrically in the metal pipe by the insulating supports and the wiring end is led out from the open end of the metal pipe, a pressure spring is arranged in the metal pipe between the closed end and the corresponding insulating support, a limiting piece is arranged at the open end of the metal pipe and clamped on the corresponding insulating support to limit the carbon fiber electric heating pipe.
[0007] As a further optimization, the limiting piece is two positioning screws symmetrically connected to the open end of the metal pipe by threads in the radial direction.
[0008] As a further optimization, the shell is tubular, and an axial gap is arranged between the shell and the closed end of the metal pipe to facilitate thermal expansion and contraction of the metal pipe.
[0009] As a further optimization, the insulating support is made of polytetrafluoroethylene material and cooperates with the metal pipe through a sliding gap.
[0010] As further preferred, a spiral blade is arranged on the inner wall of the shell in the heating cavity to form a spiral channel in the heating cavity, so as to prolong the channel length of the cold water in the heating cavity and improve the heat transfer efficiency.
[0011] As further preferred, the metal pipe is made of a metal material with a large thermal expansion coefficient.
[0012] The utility model discloses beneficial effect is:
[0013] The heat generated by the carbon fiber electric heating pipe after electrification is transferred to the metal pipe through radiation and heat conduction, and then the heat is transferred to the liquid in the heating cavity through the metal pipe to realize heating; after the scale is generated, the liquid in the heating cavity is discharged, and after the carbon fiber electric heating pipe is electrified and heated and the power supply is disconnected, the scale and the rust spots on the surface of the metal pipe can be automatically removed due to the thermal expansion and contraction of the metal pipe, so that manual descaling can be realized without disassembling the electric heating pipe, the electric heating pipe can maintain a high-efficiency heating state for a long time, the heating efficiency is high, and the service life is long. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structure schematic diagram of the utility model.
[0015] In the drawing: shell 1, water inlet 101, water outlet 102, heating cavity 103, axial gap 104, pressure spring 2, insulating support 3, spiral blade 4, carbon fiber electric heating pipe 5, metal pipe 6, power switch 7, limiting piece 8, flange plate 9. DETAILED DESCRIPTION
[0016] As Figure 1 shown, the utility model relates to a kind of self-removing scale heating devices, including shell 1, metal pipe 6 is arranged in shell 1, annular heating cavity 103 is formed between shell 1 and metal pipe 6, metal pipe 6 one end is closed and suspends in shell 1, metal pipe 6 other end passes through by flange plate 9 welded in the corresponding end of shell 1 and is sealed by flange plate 9 and shell 1 welding, water inlet 101 and water outlet 102 for external water inlet pipe and water outlet pipe are respectively arranged in the both ends of shell 1 and communicate with heating cavity 103, for being used to;Water inlet 101 is located on the one end of shell 1 close to flange plate 9, water outlet 102 is located on the one end of shell 1 away from flange plate 9, and water inlet and water outlet are respectively located on the axis of shell 1 two sides.
[0017] The shell 1 is tubular, and an axial gap 104 is provided between the closed end of the metal pipe 6 and the shell 1, and the axial gap is preferably 20-30 mm to facilitate the thermal expansion and contraction of the metal pipe 6. The metal pipe 6 is made of a metal material with a large thermal expansion coefficient, such as a copper pipe or an aluminum pipe.
[0018] A carbon fiber electric heating tube 5 is arranged in the metal tube 6, and both ends of the carbon fiber electric heating tube 5 are fixedly inserted with insulating supports 3 through clearance fit respectively, the carbon fiber electric heating tube 5 is supported concentrically in the metal tube 6 through the two insulating supports 3, and the wiring end is led out from the open end of the metal tube 6, a pressure spring 2 is arranged in the metal tube 6 between the closed end and the corresponding insulating support 3, a limiting piece 8 is arranged at the open end of the metal tube 6 and clamped on the corresponding insulating support 3, for realizing the axial limiting of the carbon fiber electric heating tube 5 in the metal tube 6.
[0019] The insulating support 3 is made of polytetrafluoroethylene material and is in sliding clearance fit with the inner hole wall of the metal tube 6. The limiting piece 8 is two positioning screws and is symmetrically connected in the radial direction at the open end of the metal tube 6 through threads.
[0020] A spiral blade 4 is fixed on the inner wall of the shell 1 in the heating cavity, the spiral blade 4 is inclined to the water inlet end, so that a spiral channel is formed in the heating cavity 103, for prolonging the channel length of the cold water in the heating cavity, thereby improving the heat transfer efficiency.
[0021] When the heating device is normally operated, the carbon fiber electric heating tube 5 is powered and heated after the power supply switch 7 connected with the wiring end is turned on, the heat is transmitted to the metal tube 6 through radiation and heat conduction, the metal tube 6 is heated, and then the heat is transmitted to the cold water entering the heating cavity through the metal tube 6 for heating, the heated water is discharged from the water outlet through the spiral channel in the heating cavity. The metal tube 6 is stably supported in the metal tube 6 through the pressure spring 2 after being heated and elongated.
[0022] After the heating device is operated for a long time, scale will be generated on the surface of the metal tube 6, when descaling is needed, the water in the shell 1 is discharged, the power supply switch is closed to make the carbon fiber electric heating tube 5 heated for several minutes, so that the temperature of the metal tube 6 is increased to above 500℃, the metal tube 6 is elongated due to thermal expansion, then the power supply switch is turned off to stop heating and cooling, so that the metal tube 6 is cold contracted to normal. Since the scale is mainly formed by the calcium and magnesium salts contained in the boiler water which are precipitated and adhered to the metal surface after being heated, the thermal expansion coefficient of the main components calcium carbonate and magnesium carbonate is quite different from that of the metal tube 6, so that the scale will automatically fall off in the process of thermal expansion and cold contraction of the metal tube 6, and the scale can be flushed out through the water outlet by entering cold water; thereby realizing descaling without disassembling the electric heating tube, and enabling the electric heating tube to maintain high-efficiency heat conduction for a long time.
[0023] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.
Claims
1. An autonomous descaling and heating device, comprising a housing, characterized in that: A metal tube is provided in the shell, and an annular heating chamber is formed between the shell and the metal tube. One end of the metal tube is closed and suspended in the shell, and the other end of the metal tube passes through a flange provided at the corresponding end of the shell and is sealed and welded to the shell through the flange. A water inlet and a water outlet are provided at both ends of the shell, respectively, for connecting to an external water inlet pipe and a water outlet pipe. A carbon fiber electric heating tube is provided in the metal tube, and insulating supports are respectively inserted at both ends of the carbon fiber electric heating tube. The carbon fiber electric heating tube is concentrically supported in the metal tube by the insulating supports, and the wiring ends are led out from the open end of the metal tube. A pressure spring is provided in the metal tube between its closed end and the corresponding insulating support. A limit piece is provided at the open end of the metal tube and is clamped on the corresponding insulating support to achieve the limitation of the carbon fiber electric heating tube.
2. The autonomous descaling and heating device according to claim 1 is characterized in that: The limiting components are two positioning screws and are symmetrically connected to the open ends of the metal pipe through threads in the radial direction.
3. The autonomous descaling and heating device according to claim 1 is characterized in that: The outer shell is tubular, and an axial gap is provided between the outer shell and the closed end of the metal tube to facilitate thermal expansion and contraction of the metal tube.
4. The autonomous descaling and heating device according to claim 1 is characterized in that: The insulating support is made of polytetrafluoroethylene material and is matched with the metal pipe through a sliding gap.
5. The autonomous descaling and heating device according to claim 3 is characterized in that: A spiral blade is provided on the inner wall of the shell in the heating chamber, so that a spiral channel is formed in the heating chamber to extend the channel length of the cold water in the heating chamber.
6. The autonomous descaling and heating device according to any one of claims 1 to 4, characterized in that: The metal tube is made of a metal material with a large thermal expansion coefficient.