A heat pump unit variable temperature heating water temperature control method and its control device

Abstract

A heat pump unit variable temperature heating water temperature control method and its control device, a hot water central heating system using a heat pump and its control method, especially relates to a heat pump unit water temperature control method used for radiator heating and a device for realizing the control method The control device includes the following steps: obtaining the indoor temperature and the room temperature setting value; adjusting the temperature control setting value of the water outlet of the three-way thermostatic valve according to the difference between the indoor temperature and the room temperature setting value Ts; according to the temperature difference according to the predetermined temperature range and Heating or cooling speed, gradually adjust the set value of the water outlet of the three-way thermostatic valve; at the same time, synchronously adjust the set value of the water temperature when the compressor stops to make the water temperature of the medium temperature water equal to the water temperature of the outlet of the three-way thermostatic valve, so as to realize the temperature control of variable temperature heating water; the present invention only uses High-temperature hot water can be produced by single-stage compression and ordinary environmentally friendly refrigerants, which can meet the requirements of high and low heating load changes while realizing the function of energy storage when a large amount of heat energy is not needed indoors, and play the role of shaving peaks and adding valleys.

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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