Heat pump water heater unit as well as control method and device thereof

Abstract

The invention discloses a heat pump water heater unit as well as a control method and device thereof. The method comprises the steps of S1, judging whether the water temperature of a water tank is smaller than the set temperature or not after receiving a valley electric signal; S2, if so, controlling a heat pump host to be started; S3, acquiring a water temperature rise value of the water tank within the first preset time, and judging whether controlling the starting of an electric auxiliary heater is needed or not; S4, if so, controlling the electric auxiliary heater to be stopped after starting for the second preset time, acquiring the water temperature rise value of the water tank within the second preset time, and calculating the formal starting time of the electric auxiliary heater; S5, judging whether the operation time of the heat pump host reaches the formal starting time or not; and S6, if not, repeatedly carrying out the steps S3-S5 until reaching the formal starting time, then, controlling the electric auxiliary heater to be started, and controlling both the heat pump host and the electric auxiliary heater to be stopped when the water temperature reaches the set temperature. Therefore, not only can the aim of saving energy be achieved, but also user demands can be met.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a control method of a heat pump water heating unit, a control device of a heat pump water heating unit and a heat pump water heating unit. Background technique [0002] Although the price of valley power is very cheap in peak and valley power consumption, the total time of valley power is limited. In order to be able to use the heat pump water heater as much as possible within a limited time and meet the set temperature of the water, it is necessary to precisely control the turn-on time of the electric auxiliary heater. [0003] In the related technology, after receiving the valley electricity signal, the heat pump host is controlled to turn on, and at the same time, the heat required to heat the water in the water tank to the set temperature and the heating capacity of the unit at the ambient temperature are calculated according to the volume of the water tank, and ...

AI Technical Summary

Problems solved by technology

[0004] However, during the operation of the unit, the heating capacity and the ambient temperature may change. Using the above method will cause a large deviation, which may lead to premature start-up of the electric auxiliary heater, resulting in increased energy consumption; Auxiliary heater, so that the set temperature of the water cannot be reached

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