Positive temperature coefficient (PTC) heating purifier, manufacturing method thereof and electric appliance
A technology of purifiers and electrical appliances, applied in chemical instruments and methods, heating methods, air heaters, etc., can solve problems such as poor adhesion performance, weak adhesion between catalysts and carriers, uneven dispersion of catalysts, etc., to avoid falling off Effect
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[0038] see figure 2 , the present invention also proposes a preparation method of a PTC heating purifier, the preparation method of the PTC heating purifier is used to prepare the above-mentioned PTC heating purifier, specifically, comprising the following steps:
[0039] In step S1 , pretreatment is performed on the heat dissipation fin 100 to remove attachments on the surface of the heat dissipation fin 100 .
[0040] This step is to remove oxides, oily dirt and other attachments on the surface of the heat dissipation fin 100 to obtain a clean and smooth surface of the heat dissipation fin 100 , thereby facilitating the formation of the intermediate layer 200 .
[0041] Generally speaking, the heat dissipation fins 100 are made of metal materials with good heat dissipation performance, usually aluminum or aluminum alloy, wherein the aluminum alloy may contain elements such as Mg, Zr, Cr, Cu, Ce; the heat dissipation fins of aluminum or aluminum alloy Sheet 100 can remove t...
Embodiment 1
[0055] Immerse the aluminum cooling fins 100 of the PTC heating purifier in dilute hydrochloric acid, until the oxide film on the surface of the cooling fins 100 is reacted, exposing pure aluminum; Wash to remove residual hydrochloric acid;
[0056] The pretreated cooling fin 100 is used as the anode, and the graphite is used as the cathode for anodic oxidation treatment, wherein the anodic oxidation solution is a sulfuric acid-oxalic acid system, the concentration of sulfuric acid is 0.06-0.3mol / L, and the concentration of oxalic acid is 0.06-0.3mol / L, the voltage of anodizing treatment is 100V, and the oxidation time is 0.5-5h.
[0057] Mix soluble salts containing metals Mn and Co with aluminum sol, immerse the cooling fins 100 formed with the intermediate layer 200 in the mixed solution, immerse for 1-5 hours, and dry in an oven for 8 hours to obtain the PTC heat purification of Example 1. device.
Embodiment 2
[0059] Immerse the aluminum cooling fins 100 of the PTC heating purifier in dilute hydrochloric acid, until the oxide film on the surface of the cooling fins 100 is reacted, exposing pure aluminum; Wash to remove residual hydrochloric acid;
[0060] Will Al 2 o 3 Mix with active agent and adhesive components to obtain Al 2 o 3 Slurry; use a compressed air spray gun or other spraying equipment to control the pressure of 1-9Mpa to spray onto the surface of the heat dissipation fin 100, and then put the surface carrier of the heat dissipation fin 100 after spraying into 60-120°C (preferably 80°C ) in an oven for 10-120 minutes.
[0061] Mix soluble salts containing metals Mn and Co with aluminum sol, immerse the cooling fins 100 of the PTC heating purifier in the mixed solution, soak for 1-5 hours, and dry in an oven for 8 hours to obtain the PTC heating purifier of Example 2 .
[0062] The PTC heating purifier of embodiment 1 and embodiment 2 is installed in the air condit...
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