Refrigeration – Processes – Circulating external gas
Patent
1996-02-22
1997-07-15
Wayner, William E.
Refrigeration
Processes
Circulating external gas
62213, 236 78B, G05D 1500, F25B 4100
Patent
active
056472200
ABSTRACT:
Merchandise temperature sensors 16 for detecting merchandise temperatures simultaneously with in-housing temperature sensors 17 for detecting the in-housing air temperature of a merchandise housing are provided in the merchandise housing of a vending machine. Further, the cooling mechanism is controlled by means of the merchandise temperature sensor 16 during the peak shift or peak cut, whereas the cooling mechanism is controlled by means of in-housing temperature sensor 17 during normal operation. Thus the merchandise temperature is directly detected during the peak shift or peak cut where the temperature sharply varies so as to increase merchandise temperature control accuracy. Even when the installation of the merchandise temperature sensors is limited to some columns in view of cost reduction, the cooling mechanism is made controllable by collectively detecting the merchandise temperature in the whole column by means of the in-housing temperature sensors 17 during the normal operation.
REFERENCES:
patent: 3381488 (1968-05-01), Lewis
patent: 3691782 (1972-09-01), Holzer
In Michinobu
Iwamoto Shozo
Kakiuchi Hiroyuki
Kawaguchi Yoshihiro
Nishioka Yutaka
The Fuji Electric Co., Ltd
Tokyo Electric Power Co., Inc.
Wayner William E.
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