| 摘要 |
PROBLEM TO BE SOLVED: To provide a vending machine for reducing power consumption by performing a heat pump operation, even in the vending machine configured by serially connecting in-box heat exchangers. SOLUTION: The vending machine is configured by serially wiring-connecting in-box heat exchangers, and wiring-connecting an expanding means between a condenser and each in-box heat exchanger, and provided with a first by-pass duct for by-passing the condenser; a second by-pass duct for by-passing the expanding means; a third by-pass duct for by-passing the expanding means and the in-box heat exchanger at the upstream side of the lowermost stream; a fourth by-pass duct for by-passing the in-box heat exchanger at the lowermost stream; and a fifth by-pass duct for by-passing the heat exchanger installed outside the box. Thus, a heat pump operation without using any heater is achievable. COPYRIGHT: (C)2011,JPO&INPIT
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