Patent ID: 7810427

Claim:
A circulation conveyor for foods and drinks comprising: a tunnel section covering an upper portion of and in a longitudinal direction of a circulation-type carrying path for conveying and supplying foods and drinks; a cooling and heating pipe disposed inside the tunnel section in its longitudinal direction, wherein a surface temperature of said cooling and heating pipe changes to control an internal temperature of the tunnel section, and wherein, in the tunnel section, an upper ventilation opening disposed above the cooling and heating pipe and a lower ventilation opening disposed below the cooling and heating pipe are provided in the longitudinal direction of the carrying path, the upper ventilation opening and the lower ventilation opening communicate with each other via a communication path, and an air blowing section is provided for circulating air in the tunnel section by drawing air from a first one of the upper ventilation opening and the lower ventilation opening, into the communication path, and discharging the drawn air through a second one of the upper ventilation opening and the lower ventilation opening; an upper temperature sensor for detecting a temperature of an upper region above the cooling and heating pipe in the tunnel section; a lower temperature sensor for detecting a temperature of a lower region below the cooling and heating pipe in the tunnel section; and an air blow controlling section for controlling air blow of the air blowing section based on temperatures respectively detected by the upper temperature sensor and the lower temperature sensor.