January 10, 2022
The utility model relates to a combined heating device which adopts a two-stage heating method, firstly obtains 40-60°C hot water by using a normal temperature or large temperature difference water source heat pump, and then obtains 60-95°C high temperature hot water by using a medium and high temperature water source heat pump. It belongs to domestic and production hot water supply equipment. It is characterized in that the combined heating device is a two-stage heater for graded heating, wherein the first-stage heater consists of heat source water, normal temperature or large temperature difference water source heat pump, water tank, and pipes and pipes that connect the heat source water with the normal temperature or large temperature difference water source heat pump. The second-stage heater consists of a water tank, a medium and high temperature water source heat pump, a water tank, and a pipe connecting the water tank and the medium and high temperature water source heat pump, and the medium and high temperature water source heat pump and the water tank. It is composed of interconnected pipes. The hot water obtained by heating the room temperature heat source water by the first stage heater is stored in the water tank, and the hot water in the water tank becomes the heat source water for the second stage again. The middle and high temperature water source of the second stage heater After heating by the heat pump, high temperature hot water is finally obtained.
