Patent ID: 7823410

Claim:
A cooling device comprising a cooler provided in an interior that is insulated adiabatically from an exterior, a cooling fan disposed on a front surface of the cooler, and a cooling chamber that is defined by a space in front of the cooling fan and in which an object to be cooled is placed, the cooling device drawing coaled air behind the cooling fan with the fan, and allowing the cooled air to flow into the cooling chamber, wherein α/D=½ to ¼ is satisfied so that an air flow is generated that comes from a side of the cooling chamber, moves around both lateral surfaces and a back surface of the cooler, and flows into the cooling chamber, whereby warmed air flowing from the side of the cooling chamber exchanges heat with ambient air of the cooler that has been cooled by the cooler, and then flows toward the cooling chamber, where αindicates a dimension of a first gap between the cooler and the cooling fan along a front-back direction and D indicates a diameter of the cooling fan, a dimension of a second gap between the cooler and a wall surface on a back surface side of the cooler is set to be larger than 50 mm, and an air pressure at a point located 100 mm forward of a point of rotational center of the cooling fan is allowed to oscillate or pulse by adjusting a rate of revolutions of the cooling fan.