Energy-saving control method for floor radiant heating system comprising variable-frequency heat-pump water heater

Abstract

The invention relates to an energy-saving control method for a floor radiant heating system comprising a variable-frequency heat-pump water heater. The energy-saving control method is characterized by comprising steps as follows: a functional expression of a water supply calculating temperature Tgj of a floor and an outdoor environment temperature Tw is established by a control system through calculation according to performance of the variable-frequency heat-pump water heater and heat load characteristics of a heating room; a functional expression of a room calculating air temperature Tnj based on a thermal comfort degree of a human body and the outdoor environment temperature Tw is established by the control system; a rotating speed of a compressor of the variable-frequency heat-pump water heater is adjusted by the control system according to the difference value of a water supply actual temperature Tgs and the water supply calculating temperature Tgj, and the water supply actual calculating temperature Tgs and the water supply calculating temperature Tgj are enabled to be consistent; the opening degree of a tee proportion regulating valve is adjusted by the control system according to the difference value of a room actual air temperature Tns and a room calculating air temperature Tnj, and the room actual air temperature Tns and the room calculating air temperature Tnj are enabled to be consistent. The energy-saving control method has the advantages that the energy efficiency of the heat-pump water heater is higher, energy-saving operation is realized, the comfort degree of the human body is better and the like.

Description

technical field [0001] The invention relates to a control method for energy saving of a floor radiant heating system of a variable frequency heat pump water heater. Background technique [0002] As a high-efficiency and energy-saving hot water product, heat pump water heaters are more and more applied to floor radiant heating. Inverter heat pump water heaters have gradually begun to be used in floor radiant heating systems due to their advantages of constant water supply temperature and high energy efficiency. At present, whether it is a fixed-frequency or variable-frequency heat pump water heater floor heating system, the design 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. Because the energy efficiency of the heat pump water heater decreases with the increase of the water supply temperature, the outdoor ambient temperature changes greatly in a heati...

AI Technical Summary

Problems solved by technology

If this control method is used alone, it is difficult to guarantee the temperature of the room, and the thermal comfort of the human body will be affected to a certain extent.

Images