Solar photovoltaic-commercial power mixedly driving cold-storage and thermal storage type heat pump unit

Abstract

The invention provides a solar photovoltaic-commercial power hybrid driving cold and heat accumulating heat pump unit which comprises a DC compressor and an AC compressor and is a double-power heat pump that is driven by a solar photovoltaic DC power and a common commercial AC power in a combining way. When sunshine exists, a direct current generated by a solar panel is used for directly driving a DC refrigerating compressor to obtain refrigerating capacity and heat amount. The produced refrigerating capacity and the heat amount can be stored respectively by phase-transited cold accumulating and heat accumulating media. The defects of the intermittent and the climate dependence of solar energy are remedied. When the DC power is not used, the AC power from power network is used for supplying power. The adaptability of a solar air conditioning system is greatly improved, and the initial investment of the system is obviously reduced.

Description

technical field [0001] The invention relates to a heat pump system, in particular to a dual-power heat pump system driven by a combination of solar photovoltaic direct current power supply and common commercial AC power supply. Background technique [0002] Heat pump water heaters have remarkable energy-saving effects. Compared with ordinary electric water heaters, since the efficiency of heat pump water heaters is greater than 1, for every 1kW of electricity consumed, 3-4kW of hot water can be obtained, so its energy-saving effect is obvious. The heat pump cold and hot water unit (water-cooled cold water type refrigerator) can also produce cold water while producing hot water. The hot water produced by it can be used for heating and domestic hot water. The cold water can be used for air conditioning and domestic cold water in winter. One machine is multi-purpose, and saves energy, so it is the core equipment of the future home central energy system, which is of great signi...

AI Technical Summary

Problems solved by technology

Ordinary solar water heaters cannot produce cold water while producing hot water

Moreover, although solar energy itself is an inexhaustible and inexhaustible clean energy, due to its intermittent and climate-dependent characteristics, solar water heaters can only function when there is sufficient sunlight during the day, and it is best to use them on cloudy days and at night. When hot water is needed, it cannot be used

[0004] At present, the existing solar photovoltaic vapor compression refrigeration system uses an inverter, that is, the direct current output from the solar panel is first boosted, inverted and turned into alternating current, and then the alternating current is used to drive the AC compressor, while the inverter The price is expensive, which increases the cost of the system

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