Refrigeration equipment with automatic defrosting function and its defrosting control method

Abstract

The invention provides a refrigeration device having an automatic defrosting function and a defrosting control method thereof. The refrigeration device comprises a cabinet body, a refrigeration circuit and a controller, wherein an air channel and a temperature and humidity sensor are also arranged in the cabinet body, the refrigeration circuit comprises a compressor, a condenser, a throttling device and evaporators, the evaporators include a first evaporator and a second evaporator, the throttling device comprises a first capillary tube and a second capillary tube, the first capillary tube isconnected with the first evaporator, the second capillary tube is connected with the second evaporator, the condenser is connected with the first capillary tube and the second capillary tube through athree-way valve, and an outlet of the first capillary tube is connected with an inlet of the condenser through a magnetic valve. The air channel is also provided with a fan, an inlet air valve and anoutlet air valve. The refrigeration device also comprises a vacuum assembly. The vacuum assembly comprises a vacuum pump, an air storage tank and an electric control valve which are connected together, and the vacuum pump and the electric control valve are both communicated with the air channel. Automatic defrosting is achieved, the energy consumption is reduced, and user experience is improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a refrigeration device with an automatic defrosting function and a defrosting control method thereof. Background technique [0002] At present, the small commercial horizontal freezer has a frost freezer, and its evaporating coil is wound on the inner wall of the freezer. When the freezer is in cooling operation, it relies on natural convection to cool down the food and other loads inside. Due to frequent opening and closing of the door and when the door seal is not tightly sealed, the hot and humid water vapor in the environment will enter the cabinet, and the water vapor in the food and other loads will also be emitted into the cabinet, so after a period of use, the inner wall of the freezer will appear. In the case of frosting, when the frosting is too thick, it will increase the thermal resistance between the evaporator coil and the air in the refrigerator, hindering th...

AI Technical Summary

Problems solved by technology

Due to frequent opening and closing of the door and when the door seal is not tightly sealed, the hot and humid water vapor in the environment will enter the cabinet, and the water vapor in the food and other loads will also be emitted into the cabinet, so after a period of use, the inner wall of the freezer will appear. In the case of frosting, when the frosting is too thick, it will increase the thermal resistance between the evaporator coil and the air in the refrigerator, hindering the heat exchange on the surface of the evaporator, thereby reducing the cooling efficiency, affecting the cooling effect, and the running time of the compressor will also decrease. The corresponding extension will increase the power consumption, so the freezer should be defrosted in time

At present, the commonly used defrosting method for refrigerators is manual mechanical defrosting, such as ice shovel / cork shovel defrosting. This method needs to empty the food and other loads in the refrigerator, which is time-consuming and laborious. It may damage the inner container or refrigeration pipeline and is not easy to clean; at the same time , the defrosting time judgment of the manual defrosting method is very subjective, and there is no exact defrosting judgment condition; Early defrosting will cause too frequent defrosting, thereby reducing energy efficiency

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