Heating double-water-pump gas heating water heater and double-water-pump control method

Abstract

The invention discloses a heating double-water-pump gas heating water heater and a double-water-pump control method. The heating double-water-pump gas heating water heater is characterized by comprising a gas heating water heater body, a heat exchanger, a plate heat exchanger and a main control panel, wherein the heat exchanger is provided with a water outlet and a water return port; the water outlet of the heat exchanger is connected with a water outlet pipe; the water return port is connected with a water return pipe; the water return pipe is connected with a first water pump, a second waterpump and a three-way valve; the first water pump and the second water pump are connected in series; the water return pipe is connected with the three-way valve through the first water pump and the second water pump; the other two connectors of the three-way valve are connected with a first connector of the plate heat exchanger and a heating water return connector respectively; the main control panel is provided with a first water pump control circuit and a second water pump control circuit; the first water pump control circuit is connected with and controls the first water pump; the second water pump control circuit is connected with and controls the second water pump; the water outlet pipe of the heat exchanger is provided with a water outlet temperature sensor and an electric three-wayvalve; and the electric three-way valve is connected with the plate heat exchanger and a heating water outlet connector. The heating double-water-pump gas heating water heater is flexible in control,and the effective service life of the water pumps is prolonged.

Description

technical field [0001] The invention relates to the technical field of gas-fired heating water heaters, and more particularly relates to a heating double-pump gas-fired heating water heater and a method for controlling the double-water pumps. Background technique [0002] Due to the large heating area of ​​villas or large-scale users, when choosing a gas heating water heater as a heating source, it is often necessary to purchase a high-power gas heating water heater product, and the product must also have the characteristics of providing large flow and large head . Therefore, under normal circumstances, two water pumps of the same specification will be installed in the water circuit of the high-power gas heating water heater. The two water pumps are connected to the same control circuit, and the two water pumps start and stop at the same time. In the bathroom state, especially in summer, the heat load demand is small, and one water pump can meet the circulation flow demand...

AI Technical Summary

Problems solved by technology

In the bathroom state, especially in summer, the heat load demand is small, and one water pump can meet the circulation flow demand. At this time, if both water pumps are turned on, it will not only waste electric energy, but also shorten the effective service life of the water pump.

When one of the water pumps is stuck or damaged, it cannot be effectively monitored and an error reminder will be reported in time, which will affect the heating effect of the user

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