Cooling and heating system utilizing heat pump air conditioner and solar energy

Abstract

The invention discloses a cooling and heating system utilizing a heat pump air conditioner and solar energy. The cooling and heating system is characterized by comprising a solar energy unit, a heat pump air conditioner unit, a water tank and a tail end cool and heat supply unit. The solar energy unit comprises a solar heat collector, a water inlet pipeline and a water outlet pipeline, the water inlet pipeline and the water outlet pipeline are connected with the solar heat collector, an electric heat tracing band is arranged on the periphery of the water inlet pipeline and the water outlet pipeline, and the electric heat tracing band is connected with a solar controller. The water inlet pipeline and the water outlet pipeline are respectively provided with a shut-off valve, an electromagnetic valve is arranged at the downstream position of the shut-off valve of the water inlet pipeline, a check valve is arranged at the downstream position of the shut-off valve of the water outlet pipeline, and a solar circulating pump is arranged at the downstream position of the check valve. A heat collector temperature probe is arranged on the solar heat collector, and connected with the solar controller, and the water inlet pipeline and the water outlet pipeline are connected with an air discharge pipe at the tail end of the solar heat collector.

Description

technical field [0001] The present invention is a cooling and heating system, especially a heating and cooling system using heat pump air conditioner and solar energy, which uses heat pump air conditioner as cold and heat source, heat pump air conditioner and solar energy as heat source, and adopts radiant heating and fan coil unit for cooling. system. Background technique [0002] Existing heat pump air conditioners and solar cooling and heating systems have the following problems: 1) the use of solar energy for heating cannot be prioritized; 2) the heat storage of the system is not enough to effectively supplement the insufficient heat supply during the coldest time of winter night; 3) the heat pump air conditioner The machine is directly connected to the indoor end, the temperature of the refrigerant will not increase during continuous heating operation, and the heat pump cannot generate enough heat; 4) The heat pump draws heat from the indoor during defrosting, which wil...

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Problems solved by technology

[0002] Existing heat pump air conditioners and solar cooling and heating systems have the following problems: 1) the use of solar energy for heating cannot be prioritized; 2) the heat storage of the system is not enough to effectively supplement the insufficient heat supply during the coldest time of winter night; 3) the heat pump air conditioner The machine is directly connected to the indoor end, the temperature of the refrigerant will not increase during continuous heating operation, and the heat pump cannot generate enough heat; 4) The heat pump draws heat from the indoor during defrosting, which will cause the indoor temperature to drop; 5) The system is too complicated to use a pressure water tank, High cost; 6) Unbalanced water flow at each end, uneven distribution of cold and heat in each room; 7) Complex cooling and heating conversion

[0003] From the effect of use, although the heat pump can stably heat at -15°C, many heating systems cannot meet the normal heating requirements at -5°C

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