Double-water-tank system air source heat pump water heater

Abstract

The invention discloses an air source heat pump water heater with a double-water tank system. The water heater comprises a main machine, a heating water tank, a heat-preservation water tank and a controller, wherein the heating water tank is parallelly connected with a water supplementing system consisting of a water meter, a first electromagnetic valve, a first ball valve and a first check valve; the heat-preservation water tank is connected with a water supply system consisting of a fourth electromagnetic valve, a second ball valve and a third ball valve; and the main machine forms a hot water circulating system together with a second electromagnetic valve, a third electromagnetic valve, the fourth electromagnetic valve, a fifth electromagnetic valve and a second check valve. The heating water tank, a first high water level switch, a first low water level switch, a heating water tank temperature sensor, the heat-preservation water tank, a second high water level switch, a second low water level switch and a heat-preservation water tank sensor form a water storage system. A fourth ball valve, a fifth ball valve, a first butterfly valve, a second butterfly valve, a second circulating water pump and a target flow switch form a cleaning system. The water heater can reduce working temperature spots and power consumption of a machine set and improve the COP value of the machine set effectively.

Description

technical field [0001] The invention relates to an air heat source heat pump water heater, in particular to an air source heat pump water heater with a double water tank system. technical background [0002] At present, the water heaters commonly sold in the air source heat pump water heater market in my country are mainly single water tank system and double water tank system. Among them, the water intake of the water heater in the single tank system is usually controlled by a stainless steel float valve. When the water tank is full, the float valve opens to replenish water. low. However, when the customer uses hot water, the cold water is automatically replenished as the float ball decreases. The temperature of hot water is 55°C, and the temperature of tap water is 15°C. When the customer uses 50% of the hot water, 50% of the cold water also enters. The surface temperature can no longer meet the customer's requirements, and the availability of hot water is low; while the...

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Problems solved by technology

However, when the customer uses hot water, the cold water is automatically replenished as the float ball decreases. The temperature of hot water is 55°C, and the temperature of tap water is 15°C. When the customer uses 50% of the hot water, 50% of the cold water also enters. The surface temperature can no longer meet the customer's requirements, and the availability of hot water is low; while the ordinary double heating water tank system water heater consists of a heating water tank and a heat preservation water tank, the heating water tank is usually relatively small in the market, and the heat preservation water tank is relatively large, and the unit First heat the small water tank, after heating to the set temperature, pump the water to the heat preservation water tank. When the water in the heat preservation water tank does not need to cool down for a long time, then pump the water back to the heating water tank for heating, or place the heating water tank above the heat preservation water tank to rely on water The self-weight flows into the heat preservation water tank

The water supply between the two water tanks and the return water for secondary heating need to be realized by the water pump. On the one hand, the installation cost is high, and on the other hand, due to the large number of water pumps, the stability and reliability are reduced, and the power consumption is large; During the period when the water tank is sent to the heat preservation water tank, the unit does not work, and the time for making hot water is wasted

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