Engine-driven cascade heat pump device

Abstract

The invention discloses an engine-driven cascade heat pump device which is characterized by comprising a cascade heat pump system, at least an engine system and a water loop, wherein the cascade heat pump system comprises a high-temperature circulating system and a low-temperature circulating system; a high-temperature compressor, a condenser, a high-temperature reservoir, a high-temperature throttling valve, a high-temperature refrigerant heater, a condensation evaporator, a high-temperature air-liquid separator and a refrigerant side valve form a high-temperature refrigerant circulating system; a low-temperature compressor, a condensation evaporator, a low-temperature reservoir, a low-temperature throttling valve, a low-temperature refrigerant heater, an evaporator, a low-temperature air-liquid separator and a refrigerant side valve form a low-temperature refrigerant circulating system; and the engine system comprises an engine, an engine cooling heat exchanger, a smoke heat exchanger, a cooling water bypass valve and a fuel regulating valve. The engine-driven cascade heat pump device disclosed by the invention can improve the utilization efficiency of fuel, realize high-efficiency utilization of energy sources, reducing pollution, and realizing multiple functions of refrigerating in summer, heating in winter, preparing domestic hot water and the like with the same unit.

Description

Technical field: [0001] The invention relates to an engine-driven cascade heat pump device, which belongs to the technical field of heat pump utilization. Background technique: [0002] At present, the heating and heating of buildings in our country mainly include boiler room or thermal power plant heating, heat pump heating and other methods. Boiler rooms or thermal power plants mostly rely on direct combustion of fossil fuels to obtain heat. This heating method not only consumes a large amount of non-renewable energy, but also emits a large amount of greenhouse gases and pollutants, causing serious environmental pollution. Heat pump heating is widely used in southern my country. Its disadvantages are that due to the low outlet water or air temperature, generally lower than 60°C, it is mostly used in conjunction with fan coil units, the system is complex and the initial investment is high; The third is that the outlet water temperature of ordinary heat pumps is generally l...

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Problems solved by technology

Its disadvantages are that due to the low outlet water or air temperature, generally lower than 60°C, it is mostly used in conjunction with fan coil units, the system is complex and the initial investment is high; The third is that the outlet water temperature of ordinary heat pumps is generally low, and it cannot be combined with the end radiators commonly used in the north for heating. The efficiency is very low and it is prone to failure; Fourth, most of the existing heat pumps are electric. Since coal power generation still accounts for a considerable proportion in my country's power structure, the large amount of power consumed by the heat pump not only causes power load peak-valley difference and other power supply It also indirectly caused the emission of a large amount of greenhouse gases and pollutants, aggravating the greenhouse effect and environmental pollution

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