Energy-saving control method for self-adaptation frequency-conversion heat pump hot water heating system

Abstract

The invention relates to an energy-saving control method for a self-adaptation frequency-conversion heat pump hot water heating system. The energy-saving control method is characterized by comprising the steps that a basic functional expression among a heat pump water supply calculating temperature, an indoor set temperature and an outdoor environment temperature is established, and the temperature difference between the heat pump water supply calculating temperature and an actual water return temperature is judged so that the heat pump water supply calculating temperature can be corrected; the heat pump water supply calculating temperature is corrected again on the basis of a first corrected functional expression according to the deviation between a stabilized actual room air temperature and a set indoor temperature; and the rotating speed of a compressor of a frequency-conversion heat pump water heater is adjusted according to the difference value between an actual water supply temperature and the heat pump water supply calculating temperature obtained through a second corrected functional expression, and therefore an actual water supply calculating temperature and the heat pump water supply calculating temperature tend to be consistent. The energy-saving control method has the beneficial effects that the heat preservation characteristics of different buildings and the differences of laying of hot water coils are taken into full consideration, the water supply calculating temperature is more accurate, and the energy-saving effect is also more obvious.

Description

technical field [0001] The invention relates to an energy-saving control method for an adaptive frequency conversion heat pump hot water heating system. Background technique [0002] As a high-efficiency and energy-saving hot water product, heat pump water heaters are increasingly used in heating systems. Frequency conversion heat pump water heaters have gradually begun to be used in radiant floor heating systems due to their advantages of constant water supply temperature and high energy efficiency. [0003] At present, whether it is a fixed-frequency or variable-frequency heat pump water heater floor heating system design, the water supply / return water temperature is generally 45°C / 35°C, and the room air temperature is mostly controlled by the floor surface temperature or room air temperature. The heat pump water heater is turned on and off. Because the energy efficiency of the heat pump water heater decreases with the increase of the water supply temperature, and the out...

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Problems solved by technology

However, due to the dynamic changes in the outdoor ambient temperature, the thermal insulation performance of different buildings and the laying of heat exchange coils are quite different, and the temperature perception of different groups of people is different, how to use a simple method to determine the optimal heat pump water supply temperature is to achieve heat pump operation The key to energy saving

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