The heating system of the hot air blower drying and disinfecting cabinet is preferably a hot air fan, and the heat source is usually a heating wire or a PTC heating element. In order to keep the high humidity for a long time and improve the heating efficiency in the cabinet, the hot air circulation heating method is better. The design of the hot air circulation duct must ensure that the temperature rise in the cabinet is relatively uniform, and there is no heating dead angle under full load conditions. The disadvantage is that the cost of the components of the hot air blower system is relatively high, and the proportion of the cost in the small drying cabinet is too large.
The opalescent quartz heating tube used in the electric high-temperature utensil disinfection cabinet is a kind of electric heating element with low cost, wide versatility, high life and convenient installation, and the far-infrared emissivity accounts for more than 60% of the output power, and the heated object can be directly It absorbs far-infrared rays and thus heats up quickly and has high thermal efficiency. It is an ideal heating element for high-temperature dry disinfection.
The maximum working temperature of the drying and disinfecting cabinet is 95e. If the white quartz heating tube is directly used, the high-efficiency heat radiation will heat the items near the heating tube, and the items far away from the heating tube can only be heated by the heat convection heat of the air, so that each The temperature difference is very large, which is easy to damage the plastic products and can not achieve the disinfection and drying effect. There are currently two ways to heat the tube:
(1) Low-infrared heating tube is adopted: by reducing the surface temperature of the element, the radiation conversion efficiency is effectively reduced, and the convenient way to lower the temperature is to reduce the power of the heating tube.
(2) The thermostat is installed near the heating pipe, and the maximum temperature is not exceeded by the repeated frequent actions of the temperature controller. In the above two modes, the power input per unit time is reduced under the condition of the heat source layout, the heating time is prolonged, the temperature rise is slow, and the heat efficiency is low.
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