Dynamic control method for heating heat pump water system

Abstract

The invention relates to a dynamic control method for a heating heat pump water system. The method comprises the following specific steps that a heating water circulating system is prepared; the temperature to be reached is set and recorded as T<0>; indoor temperature is measured, and recorded as T<S>; the difference value of the indoor temperature T<S> and the temperature T<0> to be reached is obtained through comparison, and when |T<0>-T<S>|>=5, a high heating mode is started; when |T<0>-T<S>|<5, an energy saving mode is started; and when the energy saving mode is started, the water temperature of an intermediate-temperature container and the temperature of an outlet C of a three-way thermostatic valve need to be dynamically adjusted according to the difference value of the indoor temperature T<S> and the temperature T<0> to be reached to dynamically adjust heating temperature to ensure that the indoor temperature is proper. The dynamic control method has the beneficial effects that according to the control method, the single heating form of a heat pump water heater is changed to heating with the high heating mode and the energy saving mode. Under the high heating mode, the indoor temperature can be improved fast; and when the indoor temperature is close to the set temperature, the high heating mode is automatically converted to the energy saving mode, it can be guaranteed that the indoor temperature is constant, and the indoor temperature is prevented from exceeding comfortable temperature.

Description

technical field [0001] The invention relates to a heating device control method, in particular to a dynamic control method of a heating heat pump water system. Background technique [0002] Heating in northern rural areas is mostly based on radiators, because coal boiler heating has a great impact on the environment. The country has implemented the "coal to electricity" policy, which provides a huge opportunity for air source heat pumps for heating. When the radiator is heating, the general supply water temperature is about 65-50°C, the return water temperature is 55-40°C, and the temperature difference between supply and return water is 10°C. The heating temperature of the air source heat pump is 55°C, and the maximum unit outlet water temperature can reach 60°C, and the heat pump water heater is a cycle heating type, the water drawn from the radiator can only be heated by about 5°C, and the temperature reaching the radiator is only over 20°C It is much worse than 65 degre...

AI Technical Summary

Problems solved by technology

The heating temperature of the air source heat pump is 55°C, and the maximum unit outlet water temperature can reach 60°C, and the heat pump water heater is a cycle heating type, the water drawn from the radiator can only be heated by about 5°C, and the temperature reaching the radiator is only over 20°C It is much worse than 65 degrees. It takes a long time to heat up the water in the whole system to heat up to 55 degrees. In this way, the indoor temperature rise will be very slow, which will cause users to be dissatisfied with the heating of the heat pump.

[0003] At the same time, when the indoor temperature reaches the set temperature, if the hot water above 55 degrees is continuously supplied, at this time, because the wall insulation effect is better and the heat dissipation is small, the indoor temperature will rise, exceed the set temperature, and fail to reach the set temperature. Comfortable temperature requirements. At this time, the customer artificially opens the window to introduce fresh air to cool down the indoor temperature, thereby losing a lot of heat energy and greatly increasing the operating cost.

When the indoor temperature is close to the set temperature, hot water of 55 degrees is always produced to supply the radiator, the energy consumption of the compressor will increase a lot, and the heat dissipation of the pipeline will also increase a lot