Low-temperature heat pump water heater

Abstract

The invention relates to a low temperature heat pump water heater, comprising a compressor, a hot water heat interchanger, a throttle mechanism, a super-cooling charge air cooler, an outdoor heat interchanger, a gas-liquid separator, a heat preservation water tank, a water pump and a defrosting electromagnetic valve. In the invention, a super-cooling charge air cooler air supply device is provided, under the operation of low temperature working condition for producing hot water, the low temperature heat pump water heater of the invention adopts the super-cooling charge air cooler to add saturated refrigerant gas of intermediate pressure to the compressor, so that condensate depression of the refrigerant in the primary cycle is increased while suction capacity of the compressor is increased, thus increasing mass flux in the major cycle, increasing heating capacity and reducing discharge temperature and compression ratio of the compressor. The water heater of the invention has simple structure, easy production, low production cost, high efficiency and energy saving and reliable and stable operation.

Description

1. Technical field [0001] The invention relates to the field of air source heat pump water heaters, in particular to a heat pump water heater with good heating effect under outdoor low temperature conditions. 2. Background technology [0002] At present, the ordinary air source heat pump water heaters sold on the market suffer from serious attenuation of heating capacity under low temperature outdoor conditions, and even fail to start and run normally. In the cold winter in northern my country, they cannot meet the basic demand for hot water supply. Therefore, in cold areas, fuels such as heating wire and gas are still used to supply hot water, and these hot water needs to consume a lot of fuel and electric energy, which pollutes the environment and is not economical. Now the world advocates energy saving and emission reduction, so it is necessary To develop a low-temperature heat pump water heater with simple structure, easy manufacture, low cost, high efficiency and energy...

AI Technical Summary

Problems solved by technology

[0002] At present, the ordinary air source heat pump water heaters sold on the market have serious attenuation of heating capacity under the low temperature outdoor conditions, and even cannot start and run normally. In the cold winter in northern my country, they cannot meet the basic demand for hot water supply.

Therefore, in cold areas, fuels such as heating wire and gas

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