Patent ID: 11873935
Assignee: DENSO CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 32:
33. An internal heat exchanger comprising:
an outer pipe forming an outside pipe of a double pipe; and
an inner pipe formed separately from the outer pipe and forming an inside pipe of the double pipe, and wherein
the inner pipe forms, thereinside, an inner flow path through which a refrigerant of a low-pressure side for a refrigeration cycle flows, and wherein
the inner pipe and the outer pipe form, therebetween, an inner-outer flow path through which the refrigerant of a high-pressure side for the refrigeration cycle flows, and wherein
the inner pipe and the outer pipe form, therebetween, a concentric structure which arranges the outer pipe and the inner pipe concentrically, and wherein
the inner pipe has a distal end which extends more outwardly in an axial direction than a distal end of the outer pipe, and further comprising:
a connector interposed between the outer pipe and the inner pipe and a connection target member and defines both a low-pressure communication flow path communicating the inner flow path with a refrigerant passage of the connection target member and a high-pressure communication flow path communicating the inner-outer flow path with a refrigerant flow path of the connection target member;
an outer pipe side sealing member is interposed between the outer pipe and an outer pipe insertion portion of the connector to prevent a refrigerant leakage from a high-pressure communication space; and
an inner pipe side sealing member is interposed between the inner pipe and an inner pipe insertion portion of the connector to prevent a refrigerant leakage from the high-pressure communication space, wherein
the double pipe and the connector are mechanically fixed at a place other than places where the outer pipe side sealing member and the inner pipe side sealing member are arranged, and wherein
the high-pressure communication space is formed so that the distal end of the outer pipe is separated from an innermost portion of the outer pipe insertion portion of the connector, and wherein
the high-pressure communication flow path communicates with the high-pressure communication space, and wherein
the distal end of the inner pipe and the innermost portion of the inner pipe insertion portion form a gap therebetween, and wherein
the distal end of the inner pipe and the distal end of the outer pipe are capable of being shifted in an axial deviation.