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:
Jun. 11, 2019
Filed:
Mar. 16, 2015
Sanden Holdings Corporation, Isesaki-shi, Gunma, JP;
Sanden Holdings Corporation, Isesaki-shi, Gunma, JP;
Abstract
There is disclosed a refrigeration device which is capable of inexpensively improving durability of an electronic expansion valve (an outdoor expansion valve) for use in a refrigerant circuit. A vehicle air conditionerhas a refrigerant circuit R including an outdoor expansion valve. The vehicle air conditioner includes a controller which controls energization to a coil of the outdoor expansion valve, and this controller executes operation limit control to limit an operation of the outdoor expansion valveso that a temperature of the coil of the outdoor expansion valveis not in excess of a predetermined value. The controller lengthens a control period of the outdoor expansion valveand suppresses an operation amount of the outdoor expansion valvewithin a predetermined limit value to limit a duty factor, in the operation limit control.