A kind of insulating coating for electric heating pipe of electric water heater
A technology for insulating coatings and electric water heaters, applied in the direction of coatings, etc., can solve the problems of insufficient strength of insulating coatings, reduce the safety of electric heating tubes, reduce the insulation of heating tubes, etc., and achieve the effect of suppressing heat radiation and heat Dissipation, avoiding coating breakage, and improving compactness
Inactive Publication Date: 2015-12-23
ZHENJIANG TIANXIN ELECTRICAL APPLIANCE
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AI Technical Summary
Problems solved by technology
[0003] The heating tube in the prior art includes a shell and a heating wire. The gap is filled and compacted with magnesia sand with good insulation and thermal conductivity. In order to improve the insulation performance of the heating tube, an insulating coating is usually provided outside the shell. The traditional The strength of the insulating coating does not meet the requirements, and the shell of the heating tube is slightly deformed, cracks will appear in the insulating coating, which will reduce the insulation of the heating tube, thereby greatly reducing the safety of the electric heating tube
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] An insulating coating for electric heating pipes of electric water heaters, which is stirred by taking 80 parts of polyesterimide resin, 50 parts of silicone rubber, 20 parts of rock wool insulating fiber, 10 parts of silicon nitride, 8 parts of aluminum oxide, 8 parts of titanium dioxide, and 10 parts of solvent That's it. The solvent is composed of toluene acetic acid, methyl ester and trichloroethylene, and the ratio of toluene: methyl acetate: trichloroethylene is 5:3:1 by weight.
Embodiment 2
[0028] An insulating paint for electric heating pipes of electric water heaters, which is stirred by taking 80 parts of polyesterimide resin, 55 parts of silicone rubber, 30 parts of mineral wool insulating fiber, 10 parts of silicon nitride, 12 parts of aluminum oxide, 10 parts of titanium dioxide, and 12 parts of solvent Evenly, when in use, spray on the outer peripheral surface of the shell and let it dry naturally. The solvent is composed of toluene acetic acid, methyl ester and trichloroethylene, and the ratio of toluene: methyl acetate: trichloroethylene is 5:3:1 by weight.
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Abstract
The invention relates to an insulating coating for an electrical heating pipe of an electric water heater. The insulating coating is composed of a polyester imide resin, silicone rubber, mineral wool insulation fibers, silicon nitride, alumina, titanium dioxide and a solvent. The insulating coating provided by the invention has outstanding overall performance such as heat resistance; a thermal conductivity is 0.03 W / m.K; thermal insulation inhibition efficiency can reach about 90%; and thermal radiation and heat dissipation of a high temperature object and a low temperature object can be inhibited. Experiments show that when being used at a temperature of 250 DEG C + / -20 DEG C, the insulating coating composition does not crack or fall for 300 h, and has high flexural strength as high as 10 MPa.
Description
technical field [0001] The invention relates to an insulating coating, in particular to an insulating coating for an electric heating pipe of an electric water heater, and belongs to the technical field of electric heating devices. Background technique [0002] Electric water heaters Water heaters that use electricity as energy for heating are generally called electric water heaters. The power of an electric water heater is generally 900-7500W. The heating pipe is the key component of the electric water heater. The electric heating tube is made of a metal tube as the shell, and the spiral electric heating alloy wire (nickel-chromium, iron-chromium alloy) is uniformly distributed along the central axis of the tube, and the gap is filled and compacted with magnesia sand with good insulation and thermal conductivity. or ceramic seals. [0003] The heating tube in the prior art includes a shell and a heating wire. The gap is filled and compacted with magnesia sand with good i...
Claims
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IPC IPC(8): C09D179/08C09D183/04C09D7/12C09D5/25
Inventor 何国平
Owner ZHENJIANG TIANXIN ELECTRICAL APPLIANCE