Heat pump unit variable temperature heating water temperature control method and device

Abstract

The invention provides a heat pump unit variable temperature heating water temperature control method and device, and particularly relates to the heat pump unit water temperature control method for heating of heating radiators and the control device for implementing the control method. A hot water concentrated heating system using a heat pump and a control method of the hot water concentrated heating system using the heat pump are adopted in the water temperature control method and device. The method comprises the following steps that an indoor temperature and an indoor temperature set value are acquired; the temperature control set value of a water outlet of a three-way thermostatic valve is adjusted according to the difference of the indoor temperature and the indoor temperature set value Ts; the temperature control set value of the water outlet of the three-way thermostatic valve is adjusted step by step according to the preset temperature range and the temperature rising or dropping speed based on the temperature difference; and meanwhile the stop water temperature set value of a compressor is synchronously adjusted to enable the water temperature of intermediate temperature water and the water temperature of the outlet of the three-way thermostatic valve to be equal, and variable temperature heating water temperature control is achieved. According to the heat pump unit variable temperature heating water temperature control method and device, high-temperature hot water can be produced only by using single stage compression and common environment-friendly refrigerant, while the requirement for high and low heating load variation is met, the function of energy storage is achieved when a large amount of heat energy is not needed indoors, and the effects of peak clipping and valley filling are achieved.

Description

technical field [0001] The invention relates to a hot water central heating system using a heat pump and a control method thereof, in particular to a water temperature control method of a heat pump unit used for radiator heating and a control device for realizing the control method. Background technique [0002] The decline of air quality in northern my country, frequent occurrence of smog, high heating costs and many other comprehensive factors have made the capital Beijing, Tianjin, Hebei and other places make up their minds to vigorously promote the "coal to electricity" policy and spend tens of billions of dollars on traditional small coal stoves for heating. Implementation of power supporting transformation projects. Heating in the north is mostly based on radiators, and the use of heat pumps to provide heating for radiators is an important technical solution for coal-to-electricity conversion. Chinese invention patent "heat pump hot water heating device" (Chinese inven...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a water temperature control method for variable temperature heating of heat pump units. Only single-stage compression and ordinary environmentally friendly refrigerants can be used to solve the problem of different hot water temperature requirements for radiator heating in different room temperature conditions. It can not only meet the needs of rapid temperature rise when the indoor temperature is low, but also reduce the water temperature to keep the room temperature constant when the indoor temperature is close to the set value of the room temperature, so as to achieve the purpose of energy saving and consumption reduction.

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