Heating device

A heating device, comprising a heating and control module, a bypass pipe, three temperature sensors, a water pump, a valve, a three-way valve, a main water supply pipe, a main return water pipe, an indoor water supply pipe and an indoor return water pipe;

• wherein:
• a first end of the indoor water supply pipe is communicated with the main water supply pipe;
• a second end of the indoor water supply pipe is communicated with a water supply end of a radiator;
• the valve, a first temperature sensor, the heating and control module and a third temperature sensor are arranged between the first end and the second end of the indoor water supply pipe in sequence;
• and two ends of the heating and control module are connected with the bypass pipe in parallel;
• a first end of the indoor return water pipe is communicated with the main return water pipe;
• a second end of the indoor return water pipe is communicated with a return water end of the radiator;
• and the three-way valve and a second temperature sensor are arranged between the first end and the second end of the indoor return water pipe in sequence;
• and
• a third end of the three-way valve is communicated with a first end of the water pump, and a second end of the water pump is communicated with the indoor water supply pipe between the first temperature sensor and the heating and control module.