A high-efficiency large temperature rise two-stage throttling two-stage compression heat pump water heater

Abstract

The invention provides a high-efficiency big-temperature rise heat pump water heater with two stages of throttling and two stages of compression. An outlet of a high-pressure compressor communicates with a refrigerant inlet of a first condenser; a refrigerant outlet of the first condenser communicates with an inlet of a first gas-liquid separator via a first throttling device; a gas outlet of the first gas-liquid separator communicates with an inlet of the high-pressure compressor, while a liquid outlet of the first gas-liquid separator communicates with an inlet of an evaporator via a one-way valve and a second throttling device; an outlet of the evaporator communicates with an inlet of a low-pressure compressor; an outlet of the low-pressure compressor is divided into two branches, wherein one branch communicates with a refrigerant inlet of a second condenser via a first stop valve and a refrigerant outlet of the second condenser communicates with an inlet of the second throttling device; and the other branch communicates with the inlet of the high-pressure compressor via a second stop valve; a main cold water inlet communicates with the second condenser and the first condenser via a water pump; and a hot water outlet of the first condenser serves as a main hot water outlet. The high-efficiency big-temperature rise heat pump water heater with two stages of throttling and two stages of compression greatly reduces the power consumption, improves the energy efficiency and expands a working temperature zone.

Description

technical field [0001] The invention relates to a water heater, in particular to a heat pump water heater. Background technique [0002] As environmental and energy problems are becoming more and more serious, especially the smog hazard, energy-saving and environmentally friendly heat pump water heaters have become an indispensable device in life with broad market prospects. However, the heat pump water heater still needs to consume a large amount of electric energy after all, so improving its efficiency has become a focus of improvement. In addition, under the low temperature in winter in northern my country, the efficiency of ordinary heat pump water heaters drops sharply or even fails to operate, which seriously restricts its energy-saving effect. Contents of the invention [0003] In order to overcome the shortcomings of the existing heat pump water heaters, such as large power consumption, low energy efficiency, and insufficiently wide working temperature range, the ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing heat pump water heaters, such as large power consumption, low energy efficiency, and insufficiently wide working temperature range, the present invention provides a high-efficiency two-stage high temperature rise system that greatly reduces power consumption, improves energy efficiency, and increases the working temperature range. Throttling two-stage compression heat pump water heater

Images