A falling film high temperature heat pump system

Abstract

The invention discloses a falling-film high-temperature heat pump system. The falling-film high-temperature heat pump system comprises a double-stage compressor and an oil separator, wherein a low-pressure cylinder inlet, a high-pressure cylinder inlet and a high-pressure output port are arranged in the double-stage compressor; and the oil separator is arranged between a condenser and the double-stage compressor, an input port of the oil separator is communicated with the high-pressure output port, and an exhaust port of the oil separator is communicated with an inlet of the condenser. The falling-film high-temperature heat pump system is characterized by further comprising an auxiliary heat exchanger; the auxiliary heat exchanger is arranged between the condenser and an evaporator; a first inlet of the auxiliary heat exchanger is communicated with an outlet of the condenser; a first outlet of the auxiliary heat exchanger is communicated with an inlet of the evaporator and a second inlet of the auxiliary heat exchanger respectively through respective corresponding electronic expansion valves; and a second outlet of the auxiliary heat exchanger is communicated with the high-pressure cylinder inlet of the double-stage compressor. The falling-film high-temperature heat pump provided by the invention is good in heating effect, low in equipment investment cost, high in heat energy utilization rate, and convenient to use for heating in northern areas with low environment temperatures.

Description

technical field [0001] The invention relates to the technical field of air conditioning systems, in particular to a falling film high temperature heat pump system. Background technique [0002] Air pollution has become one of the important items of domestic environmental governance, and in the northern region, the traditional small coal-fired boilers for heating are an important factor causing environmental pollution, and the northern winter cannot be without heating equipment, so the industry seeks more The use of energy-saving and environmentally friendly heating equipment to replace small coal-fired boilers has become the main technology development direction. At present, the existing heat pump units utilizing waste heat sources such as water sources and geothermal heat have become good heating equipment for replacing small coal-fired boilers. However, the existing heat pump unit can only provide hot water below 65°C, and its heating effect is poor. However, if the exist...

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Problems solved by technology

However, the existing heat pump unit can only provide hot water below 65°C, and its heating effect is poor. However, if the existing two-stage compression system is directly used, there is a technical problem of high cost, so this leads to the existing two-stage compression system. The heat pump unit of the compression system cannot be popularized

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