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:
Jan. 10, 2006
Filed:
Nov. 01, 2002
Toru Fujimoto, Sakai, JP;
Toru Fujimoto, Sakai, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention provides a heat exchanger unit that can appropriately inhibit freezing of a heat exchange element even in cold climates. The heat exchanger unit performes heat exchange and ventilation between an indoor space and an outdoor space, and is provided with a heat exchange element, a supply air passage and an exhaust air passage that are routed via the heat exchange element, a temperature sensor, and a control unit. The temperature sensor detects the outside air temperature. The control unit executes a first freeze inhibit control mode, which inhibits freezing of the heat exchange element, if the outside air temperature falls below a first level, and a second freeze inhibit control mode, which inhibits freezing of the heat exchange element more strongly than the first freeze inhibit control mode, if the outside air temperature falls below a second level, which is lower than the first level.