Water source heat pump air conditioner

Abstract

The invention relates to a water source heat pump air conditioner, which includes an enclosed compressor and its circulation pipeline, a four-way change valve, a refrigerant-water heat exchanger, a refrigerant-air heat exchanger, a fan and a casing. The refrigerant-water heat exchanger being as a soldered plate-type heat exchanger is mounted horizontally in the casing, whose one side external baffle has an inlet and an outlet of the refrigerant disposed diagonally and whose other side external baffle has an inlet and an outlet of circulating water disposed diagonally, so that its passage structure meet the flowability of freon and oil.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a water source heat pump air conditioner. Background technique [0002] We know that water source heat pump technology is a low-temperature low-level thermal energy resource formed by using the solar energy and geothermal energy absorbed in shallow water sources on the earth's surface, such as groundwater, rivers and lakes. A technology for high-level thermal energy transfer. The working principle of the water source heat pump air conditioning unit is to transfer the heat in the building to the water source in summer, and extract energy from the water source in winter, and the heat pump principle uses air or water as the refrigerant to increase the temperature and then send it to the building. The water source heat pump air conditioning unit is generally composed of a closed compressor, a double circulation pipeline, a four-way reversing valve, a refrigerant-water heat exchanger, a refriger...

AI Technical Summary

Problems solved by technology

The four inlets and outlets of the hot and cold fluids of the existing single-sided plate heat exchanger are all on one side of the outer baffle, and are installed horizontally or vertically when used. In this installation direction, the internal passage does not conform to the flow of Freon and oil. Sex, the flow of the medium in the heat exchanger is uneven, and it is easy to produce dead angles. When the water temperature drops to a certain level, it is easy to freeze and no longer heat exchange, thereby reducing the service life

The casing heat exchanger and the coil heat exchanger are relatively large in volume, and the exchange distance is long. When the temperature drops to a certain level, it is easy to freeze locally. resistance

With the above three existing heat exchangers, when the water temperature reaches below 15°C, the system basically cannot operate normally.

In this way, when the water source is used in winter, it will be limited by the water temperature. When the temperature is below 15°C, it is necessary to adopt an auxiliary heating method, which greatly increases the cost of use and wastes energy.

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