| 摘要 |
PURPOSE:To control the heating temperature automatically so that when the hot water feeding load is small in summer, the heating temperature is kept low while when the heating load is large in winter, the heating temperature is kept high, by a method wherein a high pressure detecting sensor of a high pressure heat pump and a water temperature detecting sensor for detecting the temperature of water in a hot water storage tank are provided thereby the operation of the heat pump is stopped by detecting the pressure of the heat pump and the heat pump is re-operated by detecting the temperature of water in the hot water storage tank. CONSTITUTION:In case where a main switch 17 is turned ON and when the temperature of water in the hot water storage tank 6 is low, a contact 13 of the water temperature detecting sensor is in a closed condition and as the pressure of the heat pump is sufficiently low, a contact 12' of the sensor is also in a closed condition so that a relay 14 is energized while contacts 15 and 16 are closed and so a blower 5' is energized to start the operation of the heat pump. As the temperature of water in the hot water storage tank 6 elevates, the pressure of the heat pump increases and when the pressure of the heat pump reaches a set value of the high pressure detecting sensor, the contact 12' of the sensor is opened to deenergize the relay 14. Therefore, the contacts 15 and 16 are opened to start the operations of the compressor 1' and the blower 5' and the operation of the heat pump is stopped to thereby complete the heating operation. In this case, since the set value of the pressure detecting sensor is made constant, the water in the hot water storage tank is heated to a high temperature when the open air temperature is low in winter while the water is heated to a low temperature when the ambient temperature is high in summer. |
