A frost-free refrigerator and its control method

Abstract

The invention relates to a control method for a frostless refrigerator. An additional heating wire is installed on the back of the refrigerating chamber of the frostless refrigerator. An air duct heating wire is arranged in the air duct system of the frostless refrigerator. Both the additional heating wire and the air duct heating wire are respectively connected with a magnetic sensitive switch and are controlled to heat by means of the magnetic sensitive switch. When the ambient temperature t is lower than or equal to t1, a heating wire control circuit is switched on and the additional heating wire and the air duct heating wire start heating. When the circuit is switched on and the ambient temperature t is higher than or equal to t2, the magnetic sensitive switch acts and the heating wire control circuit is switched off. The additional heating wire and the air duct heating wire stop heating. According to the invention, through increasing refrigerated load and refrigerated cycle wind, the functional faults, such as frosting and icing in an air duct system and the like, caused by less cycle wind when the refrigerator is used in a low-temperature harsh environment, can be solved, thus the stability and reliability of the mechanical frostless refrigerator can be improved.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a frost-free refrigerator and a control method. Background technique [0002] At present, for single-system mechanical direct-cooling refrigerator-freezers, there is generally a compensation heater in the refrigerator room to solve the problem that the freezing cannot achieve the storage temperature caused by the compressor not starting in a low-temperature environment; for frost-free refrigerators, especially A common problem faced by mechanical frost-free refrigerators is: when used in a low-temperature environment, although the temperature requirements of the freezer can be met by adjusting the damper small, the circulating air volume may be small due to refrigeration requirements. When it is high and used frequently, the moisture in the air duct system will not be taken away, causing frosting, freezing, and even blockage and functional failure. Aimin...

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Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a frost-free mechanical refrigerator and its control method that can solve the problem of functional failure caused by the small air volume of the refrigerating cycle when used in a low temperature and harsh environment.

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