Hisaka Works Ltd

Ōsaka, Japan

Hisaka Works Ltd

Ōsaka, Japan

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Patent
YKK Corporation and Hisaka Works Ltd. | Date: 2013-12-11

The invention provides a cleaning method of cleaning a product which is accommodated in an autoclave (11) and dyed by circulating a fluid in a supercritical state, the fluid into which dye is dissolved, and the autoclave (11) after the dyeing is finished, and the cleaning method includes continuously carrying out the cleaning by successively introducing a pure fluid in the supercritical state, the pure fluid including no dye, into the autoclave (11) after the end of the dyeing, thereby gradually reducing a concentration of the dye in the fluid in the supercritical state, the fluid existing in the autoclave (11). As a result, it is possible to effectively clean the products and the autoclave (11) by the supercritical fluid while suppressing precipitation of the dye which is dissolved into the supercritical fluid. Further, since the cleaning process is continuously carried out in succession to the dyeing process, it is possible to widely improve a cleaning efficiency.


Patent
Hisaka Works Ltd. and Hitachi - GE Nuclear Energy | Date: 2016-01-06

Provided is a plate heat exchanger that includes a plurality of heat transfer plates stacked to each other, a gasket interposed between each adjacent heat transfer plates, and a regulating member formed to be able to support at least partially the gasket. Each heat transfer plate has a fitting recessed portion formed in recessed manner on the side on which the gasket fitting groove is formed. The fitting recessed portion crosses the recessed strip while extending along the gasket fitting groove. The support part is arranged along the gasket fitting groove when the regulating member is held in fitting engagement with the fitting recessed portion. The support part is arranged along the gasket fitting groove when the regulating member is held in fitting engagement with the fitting recessed portion.


Patent
Hisaka Works Ltd. | Date: 2016-02-03

Provided is a plate heat exchanger, in which at least one first flow channel located at an intermediate position in the stacked direction of heat transfer plates is a reference flow channel that serves as a branching position of a flow channel of a first fluid medium, a body portion includes a pair of primary branch flow channels that provide communication between the reference flow channel and at least one first flow channel located on each of one side and the other side of the reference flow channel in the stacked direction of the heat transfer plates, one of first communication flow channels communicates only with the reference flow channel, and the other of the first communication flow channels communicates only with a first flow channel that is located on the one side and the other side of the reference flow channel in the stacked direction of the heat transfer plates, and that serves as a terminal end of the flow channel of the first fluid medium.


Patent
Hisaka Works Ltd. | Date: 2016-02-03

Provided is a plate heat exchanger, in which first flow channels and second flow channels are formed alternately with heat transfer plates therebetween. A pair of communication flow channels are provided to allow a first fluid medium to flow into and out of the first flow channels through communication of the first flow channels with each other. A flow channel of the first fluid medium is formed from the one first communication flow channel to the other first communication flow channel. At least one of the first flow channels is a reference flow channel serving as a starting point of the flow channel of the first fluid medium. One of the first communication flow channels communicates only with the reference flow channel, and the other of the first communication flow channels communicates only with a plurality of the first flow channels, the number of which is greater than the number of the reference flow channel and which serve as a terminal end of the flow channel of the first fluid medium.


Patent
Hitachi - GE Nuclear Energy and Hisaka Works. Ltd. | Date: 2012-09-13

To provide a plate heat exchanger free from degradation of gaskets which form a flow path through which a high-temperature fluid flows. In the plate heat exchanger, a plurality of heat transfer plates 20 each provided with passage holes 21, 22, 23, and 24 in corners are stacked; a flow-path forming gasket 31 is interposed between peripheries of each adjacent ones of the heat transfer plates 20; communicating-path forming gaskets 32 are installed, surrounding the passage holes 21 in each adjacent ones of the heat transfer plates 20 alternately; and thereby a first flow path 1 adapted to pass a high-temperature fluid H, a second flow path adapted to pass a low-temperature fluid C, and communicating paths 3 adapted to cause the high-temperature fluid H and the low-temperature fluid C, respectively, to flow in and out of the first flow path 1 and the second flow path 2 are formed alternately on opposite sides of each of the heat transfer plates 20. The flow-path forming gasket 31 is made up of an inner gasket member 31a and an outer gasket member 31b arranged in two parallel lines.


Patent
Hisaka Works Ltd. and Hitachi - GE Nuclear Energy | Date: 2014-09-17

A flow-path forming gasket is interposed between peripheries of each adjacent ones of stacked heat transfer plates; communicating-path forming gaskets are each installed, surrounding the passage holes in each adjacent ones of the heat transfer plates alternately; and thereby a first flow path adapted to pass a high-temperature fluid, a second flow path adapted to pass a low-temperature fluid, and communicating paths adapted to cause the fluids, respectively, to flow in and out of the first and second flow paths are formed alternately on opposite sides of each heat transfer plate. A drain hole is formed in each of the heat transfer plates to discharge fluid leaking from the first flow path, the second flow path, or the communicating path. The drain hole is surrounded by gaskets isolated from the first flow path, the second flow path, or the communicating path. A leakage flow path or a leakage collector is formed by the gaskets.


Patent
Hisaka Works Ltd. and Hitachi - GE Nuclear Energy | Date: 2014-09-03

Heat transfer plates are stacked, each being provided with a plurality of passage holes, a flow-path forming gasket is interposed between peripheries of each adjacent ones of the heat transfer plates, thereby alternately forming a first flow path to pass a high-temperature fluid, a second fluid to pass a low-temperature fluid, and communicating paths to cause the fluids to flow in and out of the first flow path and the second flow path on opposite sides of each heat transfer plate, and communicating-path forming gaskets surrounding the passage holes are interposed between adjacent ones of the heat transfer plates, thereby forming a communicating path to cause a fluid to flow in and out of the first flow path and a communicating path to cause a fluid to flow in and out the second flow path. Each communicating-path forming gasket is made up of inner and outer gasket members arranged in two lines, the inner gasket member surrounding the passage holes while the outer gasket member surrounding the inner gasket member.


Patent
Hisaka Works Ltd. | Date: 2016-02-03

Provided is a plate heat exchanger, in which at least one first channel in a center area of a body portion is a reference channel, the body portion includes a pair of primary branch channels that provide communication between the reference channel and the first channel located on each of the one side and the other side of the reference channel, one of first communication channels communicates with the reference channel, the other of the first communication channels communicates with the first channel that serves as a terminal end of the channel of the first fluid formed by the first channels communicating with each other with the reference channel serving as a starting point, and the channel of the first fluid with the one of the primary branch channels on the one side in the stacked direction serving as a starting point and the channel of the first fluid with the other of the primary branch channels on the other side in the stacked direction serving as a starting point are arranged to be symmetrical with reference to the reference channel.


Patent
Hisaka Works Ltd. and Hitachi - GE Nuclear Energy | Date: 2014-07-23

To provide a plate heat exchanger free from degradation of gaskets which form a flow path through which a high-temperature fluid flows. In the plate heat exchanger, a plurality of heat transfer plates 20 each provided with passage holes 21, 22, 23, and 24 in corners are stacked; a flow-path forming gasket 31 is interposed between peripheries of each adjacent ones of the heat transfer plates 20; communicating-path forming gaskets 32 are installed, surrounding the passage holes 21 in each adjacent ones of the heat transfer plates 20 alternately; and thereby a first flow path 1 adapted to pass a high-temperature fluid H, a second flow path adapted to pass a low-temperature fluid C, and communicating paths 3 adapted to cause the high-temperature fluid H and the low-temperature fluid C, respectively, to flow in and out of the first flow path 1 and the second flow path 2 are formed alternately on opposite sides of each of the heat transfer plates 20. The flow-path forming gasket 31 is made up of an inner gasket member 31a and an outer gasket member 31b arranged in two parallel lines.


Patent
Hisaka Works Ltd. and Hitachi - GE Nuclear Energy | Date: 2014-02-25

Provided is a plate heat exchanger that includes a plurality of heat transfer plates stacked to each other, a gasket interposed between each adjacent heat transfer plates, and a regulating member formed to be able to support at least partially the gasket. Each heat transfer plate has a fitting recessed portion formed in recessed manner on the side on which the gasket fitting groove is formed. The fitting recessed portion crosses the recessed strip while extending along the gasket fitting groove. The support part is arranged along the gasket fitting groove when the regulating member is held in fitting engagement with the fitting recessed portion. The support part is arranged along the gasket fitting groove when the regulating member is held in fitting engagement with the fitting recessed portion.

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