Air source low-temperature heat pump water heater

Abstract

The invention discloses an air source low-temperature heat pump water heater, comprising a main machine, a thermal storage heat insulating water tank, a controller, a four-way valve, a jet enthalpy increasing compressor, a high-pressure switch, a sleeve condenser, a reservoir, a drying filter, an electromagnetic valve, an assistant thermal expansion valve, an economizer, a main expansion valve, afin evaporator, a gas-liquid separator, a low-pressure switch and a check valve. The D direction of the four-way valve is connected with a gas discharging pipe of the jet enthalpy increasing compressor through the high-pressure switch, the C direction is connected with a gas inlet of the sleeve condenser, the S direction is connected with a gas absorbing port of the jet enthalpy increasing compressor through the gas-liquid separator and the low-pressure switch, the E direction is connected with a gas outlet of the fin evaporator, an outlet of the sleeve condenser is divided into two paths after passing through the reservoir and the drying filter, the main path directly enters the economizer and then enters a liquid inlet of the fin evaporator through a main thermal expansion valve, the secondary path enters the economizer through a liquid path electromagnetic valve and the assistant thermal expansion valve, and then enters an assistant gas inlet of the jet enthalpy increasing compressor through the check valve. The invention can ensure the supply of hot water all day in every season in northern places.

Description

technical field [0001] The invention belongs to the technical field of energy heating, and relates to a water heater, in particular to an energy-saving and environment-friendly air source heat pump water heater which improves the hot water supply system of the existing air source heat pump water heater. Background technique [0002] At present, there are two types of heat pump water heaters generally sold in the heat pump water heater market in my country: air source heat pump water heaters and water source heat pump water heaters. Under normal climates, the ambient temperature is much higher than the water temperature, and the power consumed to produce hot water at the same temperature is much lower than that of water source heat pump water heaters. In the northern part of my country, the ambient temperature in the cold winter season is around -15°C, while the water temperature is generally kept above 10°C, and the northern winter generally lasts for 4 months. Heat pump wat...

AI Technical Summary

Problems solved by technology

Although in the three seasons of spring, summer and autumn, air source heat pump water heaters can still meet the use requirements in the north, but in the cold winter, because of the high power consumption, it is daunting, that is to say, air source heat pump water heaters cannot be used in the north. To meet the requirements of the whole year, it is greatly restricted in terms of use and energy saving, which makes the promotion of air source heat pump water heaters in the north face a severe test

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