Complex heat source heatpump system and control method using air heat source and various geothermal or hydrothermal sources with heat exchange-switching-four way valves adapting to enthalpy of outside air and cooling-heating load

摘要

The invention relates to a general air heat source and a geothermal heat pump comprising a compressor, a heating/cooling switching four-way valve, a first heat exchanger, an expansion valve, and a second heat exchanger, To the air heat source heat pump, a heat exchanger using a geothermal or water heat source and a heat exchanger for hot water supply are added. In the geothermal or water heat source heat pump, an air heat source heat exchanger and a hot water heat exchanger are additionally installed, and at the same time, bypass pipes by four sides, three sides, and two sides are connected in series or in parallel, and the supercooling heat exchanger and expansion valve are always used. Each of the circulation circuits to allow the refrigerant to flow in one direction is constituted, and the change in refrigerant flow through the four sides and three sides of a special structure installed at the inlet and outlet of each heat exchanger, as well as the two sides and the bypass pipe is determined by the external air enthalpy, heating and cooling load, and indoor Air heat source cooling operation and heating operation, geothermal or water heat source cooling operation and heating operation, air heat source and geothermal or water heat source cooling operation and heating operation, air heat source hot water supply operation, geothermal heat It not only performs the hot water supply operation of a source or water heat source, an air heat source and a geothermal source or a water heat source hot water supply operation. Prevents problems caused by the occurrence of frost and lack of heat absorption in the air heat source heat pump in winter by using a geothermal or water heat source heat exchanger, and prevents failures due to excessive increase in condensing pressure or decrease in evaporation temperature occurring in summer. By using the original heat exchanger, it can be prevented in advance to reduce maintenance costs and reduce shaft power to increase energy use efficiency. During the off-season for heating and cooling or low load, it can be switched to hot water supply and used to reduce the installation capacity of the heat pump system and reduce construction costs. can be greatly reduced. In addition, as a national policy that requires the installation of new and renewable energy distribution projects, from 2020, buildings with a size of more than 1,000 square meters must use more than 30% of the total annual energy as new and renewable energy, which can minimize the installation quantity of underground heat exchangers. It can be used as a method and at the same time as outdoor air enthalpy that can actively utilize non-electric energy existing in air, underground, and water, and a four-way lamp for switching a heat exchanger that adapts to heating and cooling loads, using an air heat source and various types of geothermal or water heat sources. It relates to a combined heat source heat pump system and a control method.