| 摘要 |
The present invention relates to a sliding type heat radiation door including antifreeze features for the bottom of an entrance of a cold storage. The present invention comprises: a vent fan installed on a lower side of the sliding type heat radiation door opened and closed in response to an operation direction of a motor operated in a forward and backward direction; a PTC heater heating the air, forcibly generated from the vent fan, while installed at an air outlet in the vent fan; a pipe duct equally spraying the hot air, blown by the operation of the PTC heater and the vent fan, to the bottom of an entrance of a cold storage by being installed to traverse the inside of the lower part of the heat radiation door while multiple exhaust holes are made with fixed diameters and gaps and an end part is placed around the air outlet of the vent fan; a temperature sensor installed on the bottom of the heat radiation door to detect temperature around the bottom of the door and provide the temperature to a microcomputer; and the microcomputer operating the PCT heater and the vent fan through a PCT heater operating part and a vent fan operating part when the detected temperature around the bottom of the door through the temperature sensor decreases below a predetermined freezing temperature, and stopping the operation of the PCT heater and the vent fan when the temperature around the bottom of the door increases above a predetermined unfreezing temperature. Therefore, the present invention is capable of completely preventing the bottom of the entrance of the cold storage from being frozen using the hot air. |
