Highly effective air source heat pump hot water device

Abstract

The invention relates to a high-efficiency air-source heat pump hot water device, comprising air-source heat pump water heater, which comprises compressor, expansion valve, air surface-cold heat exchanger, refrigerant pipe heating water tank and refrigerant pipes for connection. The compressor is the low-return pressure low-temperature compressor. There are a and b groups of disk coils of refrigeration assigned on said air heat exchanger. Whereinto, a group of disk coils of refrigeration, compressor, expansion vale and hot water tank are used to constitute hot water heating refrigeration loop. B group of disk coils of refrigeration, compressor, expansion valve and a group of disk coils of refrigeration are used to constitute compressor-running refrigeration loop where the hot water is in non-heating condition. Compressor and a group of disk coils of refrigeration are used to constitute defrosting-running refrigeration loop of air heat exchanger. Surface-cold heat exchanger for bath heating is connected between the compressor and the hot water tank in series. The invention is suitable for running in low temperature and makes the hot water tank miniaturize. Opening-heating-using is realized. At the same time bath heating is provided.

Description

technical field [0001] The invention relates to a device for providing sanitary hot water by using a heat pump, in particular to a high-efficiency air source heat pump water heating device. Background technique [0002] Heat pump water heaters are more and more used due to their low energy consumption and high efficiency compared with electric heating tube water heaters. However, the compressors of current heat pump water heaters use medium and high return pressure medium-high temperature compressors, which have low heating efficiency in low-temperature environments, so auxiliary electric heating needs to be added to use them in environments below 0°C, which limits their use at low temperatures. Energy-saving and efficient operation in the environment. In addition, since the compressor cannot adapt to frequent start and stop operations, in order to meet the requirements of the compressor, a large-capacity water tank can only be designed, resulting in a large water tank of t...

AI Technical Summary

Problems solved by technology

However, the compressors of current heat pump water heaters use medium and high return pressure medium-high temperature compressors, which have low heating efficiency in low-temperature environments, so auxiliary electric heating needs to be added to use them in environments below 0°C, which limits their use at low temperatures. Energy-saving and efficient operation in the environment

In addition, since the compressor cannot adapt to frequent start and stop operations, in order to meet the requirements of the compressor, a large-capacity water tank can only be designed, resulting in a large water tank of the water heater, which takes up a lot of space, and cannot realize the instant on and off of the water heater. Hot, out-of-the-box, and increases configuration cost and usage energy consumption

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