Heat-pump water heater system with five capillary tubes and control method of heat-pump water heater system

Abstract

The invention discloses a heat-pump water heater system with five capillary tubes. The heat-pump water heater system comprises a compressor, a four-way valve, a plate type heat exchanger and a fin type heat exchanger, wherein the four-way valve is provided with an E tube, an S tube, an C tube and a D tube; the plate type heat exchanger is provided with a first upper port, a first lower port, a second upper port and a second lower port; and the input end of the compressor is communicated with the S tube of the four-way valve. In the heat-pump water heater system, a first electromagnetic valve,a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve and a fifth electromagnetic valve are controlled according to different ambient temperatures correspondingto the valves, so that a refrigerant does not easily enter the compressor in the low-temperature operation process of the compressor, and the unit capacity and energy efficiency of a heat pump waterheater within different ambient temperature intervals are improved, and the compressor is controlled to operate at the high temperature environment interval within the evaporation temperature; the five capillary tubes are adopted to replace throttling parts, so that the throttling parts are prevented from being blocked; and meanwhile, when a heat pump water heater unit defrosts, the flow is increased and quick defrosting is realized.

Description

technical field [0001] The invention relates to the technical field of heat pump water heaters, in particular to a heat pump water heater system with five capillary tubes and a control method thereof. Background technique [0002] Heat pump water heaters are also called "air source heat pump water heaters". The heat pump water heater absorbs the low-temperature heat in the air, vaporizes it through the fluorine medium, and then compresses it through the compressor to increase the temperature, and then transforms it into the water through the heat exchanger to heat it. The high-temperature heat energy after compression is used to heat the water temperature. The air energy water heater has the characteristics of high efficiency and energy saving. It produces the same amount of hot water, which is 4-6 times that of ordinary electric water heaters. Its annual average thermal efficiency ratio is 4 times that of electric heating, and its energy efficiency is high. [0003] The co...

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Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a heat pump water heater system with five capillaries and its control method, by setting the capillary group as the first capillary, the second capillary, the third capillary, The fourth capillary and the fifth capillary are respectively connected in series with the first solenoid valve, the second solenoid valve, the third solenoid valve, the first The four solenoid valves and the fifth solenoid valve control the corresponding first solenoid valve, second solenoid valve, third solenoid valve, fourth solenoid valve and fifth solenoid valve according to different ambient temperatures, so that the compressor can operate at low temperature The intermediate refrigerant is not easy to enter the compressor liquid machine, which improves the unit capacity and energy efficiency of the heat pump water heater in different ambient temperature ranges, and controls the operation of the compressor in the high temperature range to not exceed the evaporation temperature range. blockage of the flow parts, and at the same time increase the flow rate to achieve rapid defrosting when the heat pump water heater unit is defrosting

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