Patent ID: 8437626
Filing Date: 2013-05-07
Classification: F24D,F24H

Abstract:
1. A mixed energy heater with constant temperature control, the mixed energy heater comprising a gas heating portion, an electric heating portion, a control circuit, and a flow passage, the control circuit including a power output controller, the electric heating portion including a first water passage and an electric heating device coupled to the first water passage, the gas heating portion including a heat exchanger and a second water passage coupled to the first water passage, the flow passage including the first water passage and the second water passage, a temperature sensor coupled to an outlet of the flow passage, the output of the temperature sensor is connected to a signal input of the control circuit, the signal input is connected to the power output controller, the output of the power output controller is connected to the electric heating device, wherein the power output controller includes a microprocessor, and wherein the control circuit includes a temperature detection circuit and an electric heating power control circuit, the temperature sensor is connected to the microprocessor via the temperature detection circuit, a power supply control terminal and a power control terminal of the microprocessor are connected to the controlled power supply terminal and the controlled power terminal of the electric heating power control circuit respectively, wherein an inlet of the gas heating portion is connected to a heating water return via a three-way valve and a circulating water pump, an external heating pipeline is connected to a hot water outlet of the gas heating portion via a heating water outlet connector, another inlet of the three-way valve is connected to the hot water outlet of the gas heating portion through the flow passage of a second heat exchanger, an inlet of the electric heating portion receives water from an inlet of domestic water through the other flow passage of the second heat exchanger, and the main outlet for domestic water receives water from an outlet connector of the electric heating portion.