| 摘要 |
PURPOSE:To make the stable temperature control by reducing the room temperature to the set level with the initially indicated cooling capacity on the basis of the cyclic variation in room temperature and executing the variable capacity cooling operation according to the variation in room temperature at the point when the room temperature reaches the set level. CONSTITUTION:A temperature adjustor 7 makes the on and off control for each of switches 9a-1 to 9a-4 on the basis of the detection signal from a temperature sensor 6. At this time, if the current room temperature is higher than the primary set value, all of those switches 9a-1 to 9a-4 are turned on so that a relay 10 operates and holds itself. Since a controller 8 then gives the specified operation command to an inverter 5, the inverter 5 operates a variable capacity cooler 4 at the maximum capacity thereof. When the cooling operation is promoted until the room temperature is decreased under the secondary specified temperature, all contacts 9b-1 to 9b-4 are turned on so that the supplementary relay 15 operates and holds itself, whereby causing the relay 10 inoperative. |
