Metal electric heating pipe end seal structure applied to air conditioner

Abstract

The invention discloses a metal electric heating pipe end seal structure applied to an air conditioner. The structure comprises a metal pipe, an alloy electric heating wire located inside the metal pipe and left and right silicon rubber electric wires located on both ends of the metal pipe. Both ends of the alloy electric heating wire are respectively fixedly connected with left and right lead rods. The outer ends of left and right lead rods and the inner ends of left and right silicon rubber electric wires are correspondingly connected in a brazing manner to form connection points. Left and right silicon rubber electric wires are sleeved by silica gel fiber casings. According to the invention, according to the actual use requirement of the special vehicle air conditioner, the manner of metal pipe end sealing and the manners of connection and wiring outgoing of the high temperature resistant silicone rubber electric wires are improved; the structure has the advantages of simple process, small operation difficulty, easy manufacture, low failure rate and being safe and reliable, and solves the problem of reduced air conditioner insulation performance, which is caused by cracked metal electric heating pipe end seal silica gel applied to the special vehicle air conditioner.

Description

technical field [0001] The invention relates to the technical field of metal electric heating tubes for air conditioners, in particular to an end seal structure for metal electric heating tubes for air conditioners. Background technique [0002] The working environment of air conditioners for special vehicles is usually -40°C to 60°C. At present, the heating method of air conditioners in low temperature environments generally adopts the heating method of metal electric heating tubes embedded in evaporators, and heat is transferred through the heating wires inside the metal electric heating tubes. To the surface of the evaporator, and then through the fan circulation, the heat on the surface of the evaporator is dissipated into the air to achieve the purpose of heating. Because the metal tube, the alloy heating wire and the lead-out rod are filled with magnesium oxide powder for insulation, as long as the material meets the requirements, there is generally no problem of insul...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a metal electric heating tube end seal structure for special vehicle air conditioners according to the actual use requirements of the special vehicle air conditioner, so as to solve the problem that the insulation performance of the air conditioner is reduced due to the cracking of the silicone rubber at the end seal of the metal electric heating tube for the special vehicle air conditioner

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