Patent ID: 9416991
Filing Date: 2016-08-16
CPC Classification: F24S,Y02E

Claim Text:
1. A solar heat collector comprising: a case having a bottom plate and a side plate, and opened in an upper surface; a light transmitting member provided to cover an opening in the upper surface of the case and formed of a glass plate or a transparent resin plate; an absorber plate disposed between the bottom plate of the case and the light transmitting member to convert received sunlight into heat; a heat-medium flow path thermally connected to the absorber plate; and an inlet pipe and an outlet pipe for a heat medium which communicates with the heat-medium flow path, wherein at least the bottom plate of the case includes a skin and a core material enveloped and compressed within an interior of the skin, the core material is a thermal insulation material having thermal insulation properties and a void, and a vacuum exists in the interior of the skin, the skin includes two metal panels which are disposed to face each other with the core material sandwiched therebetween and circumferential edges of the two metal panels are welded together, a plurality of line grooves having any of a triangular section, an arc-shaped section and a sine semi-wave section are formed in the metal panels, and the two metal panels are disposed to face each other on sides thereof from which bottoms of the line grooves protrude with the core material sandwiched therebetween.