Heat exchange system with automatic defrosting function

Abstract

The invention discloses a heat exchange system with an automatic defrosting function. A temperature sensor which is electrically connected to a control circuit is arranged at an evaporator; the temperature sensor is used for outputting a corresponding current signal to the control circuit according to the sensed temperature; when the control circuit judges that the evaporator has a frosting phenomenon, valve opening of an electronic expansion valve is increased, and a flow control device is temporarily stopped in a state of not shutting off a compressor, so that the temperature of a refrigerant which passes through the evaporator is increased, and heat exchange is carried out by directly introducing the high-temperature refrigerant into the evaporator, and therefore, frost is molten by virtue of quick cold-heat exchange to achieve the automatic defrosting purpose.

Description

technical field [0001] The present invention relates to a heat exchange system, in particular to a heat exchange system with an automatic defrosting function capable of automatically performing an evaporator defrosting action with a relatively simpler structure. Background technique [0002] By the way, in heat exchange systems commonly seen in the market such as air conditioners, refrigerators, air conditioners, ice water hosts, refrigerators, heat pump water heaters, etc., the most basic components include evaporators, compressors, heat exchangers, and expansion Valves and other main components are sequentially connected between the above-mentioned components through refrigerant pipes to form a circulation operation effect that allows the refrigerant to cool in the evaporator and heat in the heat exchanger. [0003] Taking the existing heat pump system as an example, it mainly connects components such as an evaporator, a compressor, a heat exchanger, and an expansion valve...

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Problems solved by technology

[0006] However, the overall heat pump system not only has to increase the pipeline cost and maintenance cost of the solenoid valve, square valve and defrosting circuit, but also during the defrosting process of the evaporator, the system will not be able to continue to produce hot water and the water temperature in the thermostat will drop. As a result, cold water is often used without warning; therefore, how to provide a heat exchange system that can automatically perform the defrosting action of the evaporator with a relatively simpler structure has long been an urgent issue in the industry.

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