Layering cycling heating system for heat-pump water heater

Abstract

The invention discloses a layering cycling heating system for a heat-pump water heater. The layering cycling heating system for the heat-pump water heater comprises a water tank, a first coil pipe, a second coil pipe, a third coil pipe and a water tank heating pipeline; the first coil pipe, the second coil pipe and the third coil pipe make tight contact with the outer surface of the water tank through heat conducting silicone grease. An entrance pipeline of the water tank heating pipeline is divided into a first heating branch, a second heating branch and a third heating branch; the entrance of the first coil pipe is connected with the first heating branch through a first electromagnetic valve, the entrance of the second coil pipe is connected with the second heating branch, and the entrance of the third coil pipe is connected with the third heating branch through a second electromagnetic valve; an exit pipeline of the water tank heating pipeline is divided into a first exit branch, a second exit branch and a third exit branch; and the exit pipeline of the water tank heating pipeline is connected with the entrance of a throttle valve, the exit of the throttle valve is connected with the entrance of an evaporator, the exit of the evaporator is connected with an air suction inlet of a compressor, and an exhaust outlet of the compressor is connected with the entrance pipeline of the water tank heating pipeline. According to the layering cycling heating system for the heat-pump water heater, the operating energy consumption of the heat-pump water heater is lowered, and the waste of water resources and energy is reduced.

Description

technical field [0001] The invention relates to the field of water heaters, in particular to a layered circulation heating system of a heat pump water heater. Background technique [0002] At the moment when environmental pollution and energy shortages are facing serious challenges, renewable energy utilization technologies are becoming more and more widely used. In the field of water heaters, heat pump water heaters, solar water heaters, etc. are widely promoted and utilized. However, solar water heaters rely on sunlight and heat, and solar energy has the characteristics of instability, low density, and being limited by factors such as time and weather. In contrast, heat pump water heaters are widely popularized and applied due to fewer limiting factors and energy saving and environmental protection. The heat pump water heater absorbs heat from outdoor air or other heat sources through the refrigerant, converts low-grade heat energy into high-grade heat energy, and sends ...

AI Technical Summary

Problems solved by technology

The method of directly heating the entire volume of water and the method of circulating heating of the entire water cannot flexibly adjust the amount of hot water in the water tank, and both have the disadvantage of causing great energy waste when the user consumes less water. The method of heat preservation water tank is suitable for large-scale water use places or places lacking hot water, but not suitable for small-sized households, and there is also the problem of energy waste

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