The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2001
Filed:
Jan. 05, 2001
Shunichi Furuya, Kanda, JP;
Kiyoshi Tanda, Kanda, JP;
Zexel Valeo Climate Control Corporation, Saitama, JP;
Abstract
In a freezing cycle, if the pressure in a high-pressure line (,) reaches an abnormal level, the high-side pressure is released toward a low-pressure line (,) to lower the pressure without releasing the coolant into the atmosphere and the coolant is released into the atmosphere only when the pressure in the low-pressure line (,) reaches an abnormal level. A first means for a safety (,) that communicates between the high-pressure line (,) and the low-pressure line (,) is provided and a second means for safety (,) is provided between the low-pressure line (,) and the atmosphere, so that if the high-side pressure reaches a level equal to or higher than a first pressure level, the first means for safety (,) is engaged to leak the high-pressure coolant in the high-pressure line (,) into the low-pressure side to allow the increase in the pressure in the high-pressure line (,) to be absorbed in the low-pressure line (,), thereby lowering the pressure in the high-pressure line without releasing coolant to the outside. Since the coolant is released into the atmosphere by the second means for safety only if the pressure in the low-pressure line (,) reaches a level equal to or higher than a second pressure, the quantity of coolant released to the outside of the freezing cycle is minimized.