Fujikoki Corporation

Denso Corporation

Akinori Nanbu

Kinya Okutsu

Kazuhiko Watanabe

Satoshi Fukuda

Osamu Hishinuma

Hiroatsu Yamada

Shin Yoshida

Makoto Sudo

Mafumi Morita

Masahiro Tomitsuka

A diaphragm includes a flange and a protrusion provided to protrude to one side of the flange, wherein the protrusion has at least two annular curved portions provided annularly on a ceiling portion having a flat surface-like shape and an outer side in a radial direction of the ceiling portion, in a state where pressure on an outer wall side of the protrusion and pressure on an inner wall side of the protrusion are the same, the at least two annular curved portions are each formed to be curved in a cross-section of the diaphragm obtained by cutting the diaphragm by a virtual plane including a center line of the diaphragm, the centers of curvature of the curved portions being arranged at different positions on a side opposite to a protruding direction of the protrusion, and the diaphragm is formed of a sheet metal.

Diaphragm and pulsation damper using same

To provide a temperature sensing tube for an expansion valve in which a hunting can be prevented by slowing of a temperature reaction rate of an expansion valve, a ceramic sintered member serving as a heat transfer delay member () in a temperature sensing tube () is fixed so as not to directly contact with a tubular member () by fixing springs () provided at both end portions (), whereby a heat transfer from the tubular member () to the ceramic sintered member becomes slow, temperature is not transferred from a mated piping directly via the tubular member, whichever outer surface of the temperature sensing tubecontacts with the piping, and a reaction rate with respect to a temperature rise of the expansion valve can be made slow.

Temperature sensing tube for expansion valve

Expansion valve

The invention provides an expansion valve maintaining the functions of the prior art expansion valve and at the same time realizing a simple arrangement with less components and less required number of assembly steps, and enabling to cut down assembly costs. A first passagethrough which refrigerant flowing toward an evaporatortravels and a second passagethrough which refrigerant flowing from the evaporatortoward a compressortravels are formed within a valve body. In response to the temperature of the refrigerant traveling in the second passage, a valve actuating member' actuates a valve meansdisposed in the valve bodyto control the flow of the refrigerant entering the evaporator. A seal membersealing the area between the first and second passagesandis disposed between the valve bodyand the valve actuating member&#x2032;. A stopper portionof the seal memberis integrally formed in advance to the valve actuating member

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Tokyo, Japan

Akinori Nanbu