| 摘要 |
PURPOSE:To make small the range of variation in room cooling capability input and especially the value of lowest input by providing an intermediate discharge port which opens up to the midway of the compression stroke of a compressor and a bypass channel which is connected to the side of the suction piping of the compressor through a solenoid valve and flow rate controller from the intermediate discharge port. CONSTITUTION:A solenoid valve 26 is provided in a bypass channel which is connected to the suction channel of a compressor through a flow rate controller from the intermediate discharge port of a three-phase compressor which has an intermediate discharge port which opens up to the midway of the compression stroke, and at first operation frequency, room temperature and room humidity are read in a LSI 14, a judgement by comparison of the operation frequency with a set frequency is made and after judgement by comparison of the room temperature with room humidity and respective set values, a transistor 14 for switching is turned ON only under the condition that the room temperature is below a set temperature and, further, the room humidity is below a set humidity and by the signal of LSI 14, and a relay 16 is turned ON and the solenoid valve 26 opens. With this arrangement it is possible to obtain the value of the lowest input which could not be achieved in air conditioners of frequency conversion device mounting type.
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