R125 near critical circulating high temperature heat pump unit

Abstract

The present invention relates to an R125 near-critical circulation high-temperature heat pump unit. The unit comprises a heat pump unit and a water storing unit. The heat pump unit is a closed circuit consisting of a compressor, a condenser, a liquid storage device and an evaporator which are connected in sequence by copper pipes. Throttling valves are respectively arranged on the copper pipe between the condenser and the liquid storage device and between the liquid storage device and the evaporator so as to form a double-throttling structure. The heat exchanging channel of the evaporator is connected with a water inlet pipe and a water outlet pipe which are used for refrigeration water of an air-conditioner. In the water storing unit, a main water pipe is connected with a water inlet of the heat exchanging channel of the condenser through a water pump. A water outlet of the heat exchanging channel of the condenser is connected with a cold water pipeline through a water mixing valve. The mixed pipeline is a domestic hot water pipeline for being used in kitchens and washrooms. The water outlet of the condenser is communicated with the water storage tank. A pipeline for providing bath water is communicated with the water storage tank. The unit has the advantages of large temperature range, small pressure ratio, easy adjustment, simple flow and high heat pump performance parameter at a certain cold and heat source condition, etc.

Description

Technical field: [0001] The invention relates to an R125 near-critical cycle high-temperature heat pump unit with good thermodynamic performance, wide temperature adaptability range and simple process. Background technique: [0002] As an energy-saving technology, heat pump technology can provide more heat energy than driving energy, and has unique advantages in energy saving and environmental protection. It has been widely used in the field of refrigeration and air conditioning, and has achieved good energy-saving and environmental protection benefits. However, However, heat pumps have not been well applied in other traditional heat-using fields in my country, such as winter heating, domestic hot water, process steam, and hot water supply in the northern region. At present, in my country's heat consumption structure, the heat consumption of 100°C and below accounts for a considerable part, and this part of heat energy was mainly provided by small and medium-sized coal-fired ...

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Problems solved by technology

[0004] In the fields of winter heating, domestic hot water, process steam, and hot water supply in the northern region, it is difficult to achieve ideal results using the current heat pump cycle and system. In addition, many areas in the north need cooling in summer and supply in winter. In hot buildings, two systems of cooling and heating are often installed at the same time to meet the requirements of the building, which is essentially a waste

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