Output power-increased electric heating device

An electric heating device and output power technology, applied in water heaters, fluid heaters, lighting and heating equipment, etc., can solve the problems of not considering the heat-resistant limit temperature of heating tube materials, short service life of products, and safety. To achieve the effect of compact structure, reduced material consumption, and good heat exchange effect

Inactive Publication Date: 2020-08-14
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing type of heater maintains uniform temperature at both ends by increasing the heating area, but does not consider the heat-resistant limit temperature of the heating tube material used, which will lead to shorter product life and product safety. Technical defect; ...

Method used

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  • Output power-increased electric heating device
  • Output power-increased electric heating device
  • Output power-increased electric heating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1 to Figure 5 As shown, an electric heating device with increased output power includes a housing 1, a heating tube 2, a support 3, an outlet 4 and an inlet 5; 4 and the cylinder structure of the inlet 5, and the two ends of the cylinder are closed, three heating tubes 2 are installed in the shell 1, arranged in a character shape, the heating tubes 2 are equal inner diameter heating tubes 201, and the outer diameters of the heating tubes 2 are non-equal Diameter setting, the outer diameter of the heating tube 2 at the inlet 5 is smaller than the outer diameter of the heating tube 2 at the outlet 4; there is a gap between the heating tube 2 end and the shell 1 end, and the heating tube 2 and the shell 1 The space between the heating pipes 2 and the adjacent heating pipes 2 are all fixed by the support 3, and the support 3 is located in the middle of the heating pipe 2. The specific number of heating tubes 2 is adjusted according to actual needs. When the...

Embodiment 2

[0032] Such as Figure 6 and Figure 7 As shown, the difference between embodiment 2 and embodiment 1 is that the heating tube 2 in embodiment 2 is a heating tube 202 of equal medium diameter, and the inner diameter of the heating tube 2 at the 5 end of the inflow port is greater than the inner diameter of the heating tube 2 at the 4 end of the outlet port, and the inflow The outer diameter of the heating tube 2 at the port 5 end is smaller than the outer diameter of the heating tube 2 at the outlet port 4 end.

[0033] In the design of the heating tube 202 with equal medium diameter, the inner diameter of the heating tube 2 gradually decreases and the outer diameter gradually increases, so that the cross-sectional area of ​​the heating tube 2 increases rapidly. Under the condition of the heating tubes 2 of the same quality, to achieve the same heating effect, the axial dimension of the heating tube 202 with the same medium diameter is smaller. When there are constraints on ...

Embodiment 3

[0035] Such as Figure 8 and Figure 9 As shown, the difference between embodiment 3 and embodiment 1 is that the heating tube 2 in embodiment 3 is a heating tube 203 with an equal outer diameter, the outer diameter of the heating tube 2 is set at an equal diameter, and the inner diameter of the heating tube 2 at the 5 ends of the inlet port is larger than that of the outlet. The inner diameter of the heating tube 2 at the 4 ends of the orifice.

[0036] In the design of the constant outer diameter heating tube 203 , the outer diameter of the heating tube 2 is kept constant, and the cross-sectional area of ​​the tube is gradually increased by reducing the inner diameter of the heating tube 2 . When there is a requirement for the radial size of the heater or the spacing between the heating tubes 2, the heating tubes 203 with equal outer diameters can be selected to obtain better results. As the cross-sectional area of ​​the heating tube 2 gradually increases, the flow area of...

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PUM

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Abstract

The invention discloses an output power-increased electric heating device. The device comprises a shell, heating pipes, supports, an outflow port and an inflow port, wherein the two ends of the outercircular surface of the shell are correspondingly provided with the outflow port and the inflow port, the heating pipes are installed in the shell, a gap is formed between the end part of each heatingpipe and the end part of the shell, the heating pipes and the inner wall of the shell are fixed through the supports, and the adjacent heating pipes are also fixed through the supports. As a cross-sectional area increases, a heat exchange coefficient and a heat exchange area gradually increase, and heat generated by the heating pipes are more easily transferred to a fluid. A larger electric poweris loaded on the heating pipes of same quality, a heater structure is more compact, and the heat exchange effect is better. Without changing the type of material or increasing an initial speed of aninput fluid working medium, power distribution is changed by changing wall thicknesses of all sections of the heating pipes, so that the overall power distribution is more reasonable, and the purposeof improving a temperature of the fluid working medium is achieved by increasing an overall average temperature.

Description

technical field [0001] The invention belongs to the technical field of electric heaters and relates to an electric heating device for increasing output power. Background technique [0002] An electric heater refers to an electrical appliance that uses electric energy to achieve a heating effect. The heating tube is the core component of the electric heater. After the heating tube is energized, the temperature rises, the electric energy is converted into heat energy, and the heat is transferred to the air around the heating tube. As the air temperature gradually increases with the flow of air, the temperature of the heating tube from the incoming end to the outgoing end gradually increases, and the heating capacity is limited by the material temperature limit on the outgoing end side, while at the incoming end of the heating pipe The temperature is low, and there is still a large margin from the maximum heat-resistant temperature of the material. This means that more heatin...

Claims

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Application Information

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IPC IPC(8): F24H1/10F24H9/18F24H9/20
CPCF24H1/101F24H9/1818F24H9/2028
Inventor 李广超吴星学张魏赵长宇李国文朱建勇王建明寇志海
Owner SHENYANG AEROSPACE UNIVERSITY
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