Patent ID: 9585286
Date: 2017-02-28
CPC Classifications: H05K

Claim:
1. An air-cooled case which houses a heating element and a cooling fan in an enclosed space, the air-cooled case comprising: a top surface; two side surfaces opposing each other, the top surface arranged between said two side surfaces a top surface ventilation opening, formed in the top surface and located directly above the heating element; a first side surface ventilation opening and a second side surface ventilation opening respectively formed in a first of the two side surfaces and a second of the two side surfaces; and a plurality of shutters provided in the top surface ventilation opening which alternately open and close the top surface ventilation opening, wherein ventilation openings are provided to only the top and two side surfaces of the air-cooled case, wherein each of the plurality of shutters independently opens the top surface ventilation opening by its own weight when there is no forced cooling air generated by the cooling fan, and independently closes the top surface ventilation opening by a pressure of the forced cooling air when there is the forced cooling air.