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:
Feb. 09, 2016
Filed:
Mar. 05, 2012
Keigo Kikuchi, Ryuugasaki, JP;
Koji Hyodo, Kasumigaura, JP;
Isamu Aoki, Tsukuba, JP;
Tetsuji Tanaka, Abiko, JP;
Keigo Kikuchi, Ryuugasaki, JP;
Koji Hyodo, Kasumigaura, JP;
Isamu Aoki, Tsukuba, JP;
Tetsuji Tanaka, Abiko, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A construction machine includes a condenserfor cooling refrigerant for an air conditioner; a fanfor cooling the condenserby using forward cooling air produced during normal-rotation drive; other cooled objects such as a radiatorand the like disposed under the lee of the forward cooling air with respect to the condenser; a refrigerant pressure detectorfor detecting the pressure of the refrigerant flowing in the condenser; and a controllerfor executing reverse-rotation stop processing for returning the fanto the normal-rotation drive when the pressure P of the air conditioner refrigerant detected by the refrigerant pressure detectorreaches a preset normal-rotation return pressure Pduring reverse-rotation drive of the fan. Thus, the lowering of the cooling effect of an air conditioner can be suppressed while reducing the burden of cleaning an engine room.