Solar-air source combined heat pump water-free heating system with heat storage function

Abstract

The invention discloses a solar-air source combined heat pump water-free heating system with a heat storage function. The solar-air source combined heat pump water-free heating system with the heat storage function comprises a solar heat collector with the heat storage function and a heat supply system. The solar heat collector comprises a plurality of solar heat collecting pipes, an air inlet, an air outlet, a heat storage layer and a heat preservation layer, wherein the solar heat collecting pipes are distributed between the air inlet and the air outlet and connected through connectors, and an air channel is formed inside the solar heat collector. According to the heating system, after solar energy is converted into heat energy, one part of heat energy directly heats outdoor air, and the other part of heat energy is stored in a phase-change material of the heat storage layer. The heat supply system comprises an evaporator and a heat supply structure, and the evaporator and the heat supply structure communicate with each other. The air outlet of the solar heat collector communicates with the evaporator through a pipeline. Air heated by the solar heat collector and a heating medium in the evaporator are subjected to heat exchange, the heating medium evaporates when being heated, gas is converted into a heating medium of a high temperature after entering a compressor to be compressed, and heat is supplied externally through the heat supply structure.

Description

technical field [0001] The invention belongs to the technical fields of building environment and energy application engineering and heating engineering, and specifically relates to a solar-air source composite heat pump heating system with heat storage function. Background technique [0002] Air source heat pumps have the advantages of flexible use, energy saving, and high efficiency, and are suitable for use in public buildings and residential buildings. However, it has the following disadvantages: when the outside temperature is low, the evaporation temperature is low, the performance coefficient of the system is low, and the energy consumption is large under the condition of producing the same heat; on the other hand, the outdoor air temperature is low , it is easy to form frost on the evaporator. The commonly used defrosting method is reverse cycle defrosting, that is, through the four-way reversing valve, the heat pump unit is switched from the heating operation mode to...

AI Technical Summary

Problems solved by technology

This can solve the problems of evaporator frosting and low system performance when the air source heat pump system is used under the condition of large heat load in winter, and at the same time provide a new type of floor heating system, the heat medium of the floor heating system is not water , but the heat medium for the compressor. Compared with other forms of floor heating, it reduces an intermediate heat transfer process, reduces the outlet pressure and temperature of the compressor, and effectively improves the system efficiency.

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