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:
May. 01, 2001
Filed:
Apr. 14, 2000
Eiji Fukuda, Tokyo, JP;
Kazuhiko Watanabe, Tokyo, JP;
Fujikoki Corporation, Tokyo, JP;
Abstract
The invention provides a thermal expansion valve for a car air conditioner, which prevents a hunting phenomenon. The thermal expansion valve is provided with a refrigerant passage from an evaporator toward a compressor formed in an inner portion thereof and a temperature sensing and pressure transmitting member having a heat sensing function and forming a hollow portion in an inner portion thereof, which is installed in the passage. In the thermal expansion valve, a distal end of the hollow portion of the temperature sensing and pressure transmitting member is fixed to a center opening portion of a diaphragm constituting a power element portion for driving the temperature sensing and pressure transmitting member, an upper pressure chamber within the power element portion formed by the diaphragm and the hollow portion are communicated with each other so as to form a sealed space having a working fluid charged therein, and a thermal-transfer delay means is provided between a heat ballast member received in the hollow portion and an inner wall of the hollow portion.