Patent ID: 7673649

Claim:
A vacuum thermal insulating valve comprising: (a) valve comprising a valve body and an actuator; and (b) a vacuum thermal insulating box that houses the valve, the vacuum thermal insulating box comprises i. a square-shaped lower vacuum jacket equipped with a cylinder-shaped vacuum thermal insulating pipe receiving part on a side and an upper face that is made open; and ii. a square-shaped upper vacuum jacket hermetically fitted to the lower vacuum jacket from above and the square-shaped upper vacuum jacket has a lower face that is made open; and iii. a first jointed part formed by bending an inner wall and an outer wall of an upper end of the lower vacuum jacket toward an inside of the box in shape of a brim and a second jointed part formed by bending a center part of a height direction of the side of the lower vacuum jacket toward an outside of the box in shape of a brim, and further a third jointed part formed by bending an inner wall and an outer wall of a lower end of the upper vacuum jacket toward the outside of the box in shape of a brim, and both vacuum jackets are connected such that a vacuum thermal insulating side wall of the upper vacuum jacket is positioned toward a vacuum thermal insulating side wall of the lower vacuum jacket, and wherein the third jointed part of the lower end of the upper vacuum jacket and the second jointed part of the outer wall of the lower vacuum jacket are hermetically sealed by installing a first thermal insulating material layer, and a fourth jointed part formed by an inner wall of a ceiling part of the upper vacuum jacket and first jointed part of the upper end of the lower vacuum jacket is hermetically sealed by installing a second thermal insulating material layer.