Expansion valve
AssigneeDenso Corporation
InventorsShigeki Ito, Ryu Fukushima, Hiromi Ohta
Life of this patent
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Abstract
A power element has a closed space provided between a first diaphragm and a second diaphragm. An interposing member is interposed between the first diaphragm and the second diaphragm. Accordingly, a size of the closed space can be optionally determined in accordance with a shape such as a thickness of the interposing member. Therefore, limitations on the size of the closed space due to a shape of the first diaphragm and the second diaphragm can be reduced. Accordingly, limitations on the size of a fluid enclosing space due to a shape of a diagram can be reduced.
Claims13
An expansion valve comprising:
- an expansion unit that has a first diaphragm and a second diaphragm stacked with the first diaphragm in an axial direction of a uniaxial center, a fluid enclosing space in which an enclosed fluid is sealed being defined between the first diaphragm and the second diaphragm, each of the first diaphragm and the second diaphragm outwardly expanding in the axial direction of the uniaxial center as a pressure inside the fluid enclosing space increases;
- a first channel through which a flowing fluid flows, the first channel having a decompressing channel to decompress the flowing fluid;
- and
- a flow rate control unit that controls a flow rate of the flowing fluid in the first channel in accordance with deformation of the first diaphragm and the second diaphragm in the axial direction of the uniaxial center, wherein
- the expansion unit includes an interposing member interposed between the first diaphragm and the second diaphragm,
- the interposing member is interposed between the first diaphragm and the second diaphragm to define the fluid enclosing space,
- the interposing member has a fluid introduction path to introduce the enclosed fluid into the fluid enclosing space, and
- the fluid introduction path is configured to be closed.
An expansion valve comprising:
- an expansion unit that has a first diaphragm and a second diaphragm stacked with the first diaphragm in an axial direction of a uniaxial center, a fluid enclosing space in which an enclosed fluid is sealed being defined between the first diaphragm and the second diaphragm, each of the first diaphragm and the second diaphragm outwardly expanding in the axial direction of the uniaxial center as a pressure inside the fluid enclosing space increases;
- a first channel through which a flowing fluid flows, the first channel having a decompressing channel to decompress the flowing fluid;
- and
- a valve configured to open or close the first channel in accordance with deformation of the first diaphragm and the second diaphragm in the axial direction of the uniaxial center, thereby controlling a flow rate of the flowing fluid in the first channel, wherein
- the expansion unit includes an interposing member interposed between the first diaphragm and the second diaphragm,
- the interposing member is interposed between the first diaphragm and the second diaphragm to define the fluid enclosing space,
- the interposing member has a fluid introduction path to introduce the enclosed fluid into the fluid enclosing space, and
- the fluid introduction path is configured to be closed.
Dependencies are inferred from the claim text.