Central air conditioning heat recovery unit system diagram is as follows:
Central air conditioning heat recovery unit system principle: summer air conditioning heating, the indoor heat will be transferred to the circulating water, the water temperature becomes high, in the return water piping water-source heat pump heat pump water heater unit (or dual-source heat pumps: air-source heat pumps and water-source heat pumps in a collection of bodies).
Air-conditioning return water into the above unit will be indoor bring out the heat for the unit to produce hot water, cooling in the air-conditioning unit related to flow, so as to reduce the power consumption of air-conditioning unit to produce cold water, while avoiding the heat of the disordered dissipation.
Expanded information:
Liquid circulation heat recycler, also known as the customary intermediate heat medium heat recycler or combined heat recycler, it is installed in the exhaust ducts and fresh air ducts in the two groups of "water - air" heat exchanger (air cooler/cooler). It is a system consisting of two sets of "water-air" heat exchangers (air coolers/heaters) installed in the exhaust ducts and fresh air ducts, connected by piping. In order to keep the fluid in the piping circulating, a circulating pump is installed in the piping.
In winter, because the temperature of the exhaust air is higher than the temperature of the circulating water, there is a temperature difference between the air and the water; therefore, when the exhaust air flows through the "water-air" heat exchanger, the sensible heat in the exhaust air is transferred to the circulating water, so the temperature of the exhaust air decreases and the temperature of the water rises; at this time, because the circulating water temperature is higher than the incoming air temperature of the fresh air, the temperature of the circulating water is higher than the temperature of the fresh air. At this time, because the temperature of the circulating water is higher than the air temperature of the new air, water and the heat from the exhaust air to the new wind, the new wind due to heat and temperature rise.
In summer, the process is the same, but the heat transfer in the opposite direction. The liquid is generally water, in cold and cold regions, in order to prevent frost, ice, it is appropriate to use ethylene glycol water solution; and should be based on the local outdoor temperature and the solidification point of ethylene glycol, choose to use different concentrations.