Double-effect heat pump system adopting radiation floor and fan coil combination supply and using method

Abstract

The invention discloses a double-effect heat pump system adopting radiation floor and fan coil combination supply. The system comprises a double-effect heat pump unit and indoor tail end equipment. The double-effect heat pump unit comprises a use side heat exchanger I, a use side heat exchanger II, an outdoor side heat exchanger I and an outdoor side heat exchanger II. The inlet end and the outletend of a compressor communicate with two end openings of a four-way reversing valve correspondingly. The outdoor side heat exchanger I is connected with the use side heat exchanger I after passing through an expansion valve I. The outdoor side heat exchanger II is connected with the use side heat exchanger II after passing through an expansion valve II. The indoor tail end equipment comprises fancoil and fresh air equipment and a radiation floor. The use side heat exchanger I is connected with the fan coil and fresh air equipment through a water supply and return circulation pipeline I. Theuse side heat exchanger II is connected with the radiation floor through a water supply and return circulation pipeline II. According to the system, the radiation floor and the fan coil and fresh airequipment carry out refrigerating and heating in a room at the same time.

Description

technical field [0001] The invention belongs to the technical field of heat pumps, and more specifically relates to a double-effect heat pump system for combined supply of radiant floors and fan coils. Background technique [0002] In recent years, due to the improvement of awareness of the superiority and health of floor radiant cooling and heating, air conditioning using radiant floors has become more and more popular in China. However, due to the influence of the thermal inertia of the radiant end, the use of radiant floors for cooling and heating will face problems such as long response time and easy condensation on the surface. Therefore, the air conditioning method that combines radiant floors and fan coils for cooling and heating has gradually attracted attention. [0003] The traditional combined power supply system of radiant floor and fan coil unit uses a set of evaporator and condenser in the air conditioning unit, and adopts a parallel connection of radiant floor...

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Problems solved by technology

When the system is cooling, the supply and return water temperature of the fan coil unit is about 7-12°C, and the low-temperature cold water will cause condensation on the surface of the radiant floor and affect the use. Therefore, in summer, only the fan coil unit can be used for cooling alone. Floors don't work together, which inevitably wastes energy

[0004] The existing improved radiant floor plus fan coil dual supply system is based on the traditional dual supply system, adding a set of mixed water pump stations on the main supply and return water pipeline to meet the water supply temperature of the radiant floor and fan coil units at the same time. requirements, but the adjustment accessories contained in it are expensive, occupy a certain amount of indoor space, and the control is relatively complicated. There are still certain restrictions in actual use, and because the air conditioner host only contains one evaporator and one Condenser, so the refrigeration coefficient of the cycle cannot be improved by changing the evaporation temperature or condensation temperature

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