Water heater and control method thereof

Abstract

The invention provides a water heater and a control method thereof. The water heater comprises a water tank, a compressor, a four-way valve, a coiled pipe, a throttling device, a heat exchanger, an electromagnetic valve, a check valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a detection device and a controller; the controller is connected with the electromagnetic valve, the four-way valve, the first temperature sensor, the second temperature sensor, the third temperature sensor and the detection device; the opening or closing of the electromagnetic valve or the switching of the four-way valve is controlled by the controller according to the exhaust temperature, the environment temperature, the temperature of the heat exchanger and the operation time of the compressor. According to the water heater, the electromagnetic valve is added, the reversing is not performed through the four-way valve and the heat bypass defrosting is performed when the electromagnetic valve is controlled by the controller to be opened, the four-way valve is energized for reversing and the reverse cycle defrosting is performed when the electromagnetic valve is closed, the two defrosting modes are implemented, and accordingly the loss of the heat is reduced, the defrosting of the water heater can be high in efficiency, and the use comfort of the product is improved.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a water heater and a control method for the water heater. Background technique [0002] At present, the existing methods for dealing with the frosting problem of hot water machines include reverse cycle defrosting, hot gas bypass defrosting, and energy storage defrosting. Currently, the existing control scheme only uses one of the methods to complete defrosting. When the water temperature is high, if the reverse cycle defrosting method is adopted, this defrosting method will have a large impact on the system and cause a large heat loss; when the water temperature of the water tank is low, if the hot gas bypass defrosting method is used alone to complete the defrosting The process will make the hot water machine return to the hot water operation state for a long time, reducing the comfort of the user. Contents of the invention [0003] In order to solve at least one of the a...

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Problems solved by technology

[0002] At present, the existing water heaters deal with the frosting problem by means of reverse cycle defrosting, hot gas bypass defrosting, and energy storage defrosting. Currently, the existing control scheme only uses one of the methods to complete the defrosting. When the water temperature is high, if the reverse cycle defrosting method is adopted, this defrosting method will have a large impact on the system and cause a large heat loss; when the water temperature of the water tank is low, if the hot gas bypass defrosting method is used alone to complete the defrosting process, it will make the hot water machine return to the hot water running state for a long time, reducing the comfort of the user

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