Heat pump hot water machine system and control method thereof

Abstract

The invention provides a heat pump hot water machine system and a control method thereof. The heat pump hot water machine system comprises a heat exchanger, a heat preservation water tank, a water outlet pipe, a temperature detector, a first switch, a second switch and a controller, wherein the heat exchanger and the heat preservation water tank are connected through water circulation pipes; the water outlet pipe is connected with the water circulation pipes; the temperature detector is used for detecting an outdoor environmental temperature in real time; the first switch and the second switch are connected on the water outlet pipe in series, wherein the second switch is kept at a normal close status when the heat pump hot water machine system is alive and at a normal opening status when the heat pump hot water machine system is dead; the controller is connected with the first switch and controls the first switch to open when the outdoor environmental temperature is lower than a preset temperature so as to discharge water in the heat exchanger, the heat preservation water tank and the water circulation pipes when the heat pump hot water machine system is dead. According to the heat pump hot water machine system and the control method thereof, water drainage can be conducted automatically to prevent the system from being frozen off, and water resource waste can be reduced.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a heat pump water heater system and a control method thereof. Background technique [0002] When the temperature is relatively low, such as winter, some pipes and components of some equipment need antifreeze measures. For example, some pipes and components of water cycle heat pump hot water units need to be antifreeze through electric heaters when the temperature is lower than 0°C . In case of a sudden power failure, in order to prevent the water pipeline from freezing and the refrigerant-water heat exchanger in the unit from freezing, it is necessary to drain the system. In the prior art, drainage of the system is generally performed manually, and sometimes professional technicians are required to perform the operation. Therefore, the disadvantage of the existing technology is that when the ambient temperature is lower than 0°C in winter, if there is a sudden powe...

AI Technical Summary

Problems solved by technology

Therefore, the disadvantage of the existing technology is that when the ambient temperature is lower than 0°C in winter, if there is a sudden power failure and the user fails to drain the water in the system in time, the unit or pipeline will be frozen, which will affect the use of the system and cause inconvenience

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