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131. 发明专利

JPH0250381B2 失效
公开(公告)号：JPH0250381B2
公开(公告)日：1990-11-02
申请号：JP17321082
申请日：1982-10-04
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , KAWAMURA SHIGETO
IPC分类号： F25B9/02

132. 发明专利

JPH02143057A CRYOGENIC GENERATOR 失效
公开(公告)号：JPH02143057A
公开(公告)日：1990-06-01
申请号：JP29454788
申请日：1988-11-24
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： KAWAMURA SHIGETO , MATSUMOTO KOZO , KAJIWARA HIROTAKE , FUJIMORI KANJI
IPC分类号： F25B9/06 , F25B9/02
摘要： PURPOSE:To enable an efficiency of operation to be improved and further to enable another expansion device to be performed while one expansion device is repaired by a method wherein a plurality of expansion devices are arranged in parallel or independently, valves are arranged across the expansion devices, and these expansion devices are switched through each of the valves in compliance with an operation mode. CONSTITUTION:An expansion turbine 4b is connected in parallel with an expansion turbine 4a, an expansion turbine 5b is connected in parallel with an expansion turbine 5a and valves are arranged across each of the expansion turbines. While a precooling of freezed load 13 or a liquid accumulation are being carried out under a liquefying mode, the expansion turbines 4a and 5a for the liquefying mode are applied and in turn, as the freezed load 13 shows a normal temperature, the turbines are changed over to the expansion turbines 4b and 5b for the freezing operation so as to change over the valves in response to the operation mode and then an efficient operation can be attained. While performing the freezing operation, the expansion turbines 4a and 5a are kept stopped, resulting in that their maintenance can be carried out.

133. 发明专利

JPH01242121A ADSORPTION APPARATUS 失效
公开(公告)号：JPH01242121A
公开(公告)日：1989-09-27
申请号：JP6957488
申请日：1988-03-25
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： FUJIMORI KANJI , MATSUMOTO KOZO , KAJIWARA HIROTAKE
IPC分类号： B01D53/04
摘要： PURPOSE:To obtain the apparatus eliminating the need of particular heating or cooling fluid to be flowed to a heat transfer pipe by heating or cooling again the gas regenerating the adsorbent in a adsorber and supplying it to the heat transfer pipe in the adsorber. CONSTITUTION:The gas to regenerate an adsorber 1b is heated at a heating chamber 11 through a piping 22 and sent to the heat transfer coil 3b of the adsorber 1b. The regenerating gas flowing through the heat transfer coil 3b heats the surrounding adsorbent 2b and is discharged through a valve 8b to be entered a heating chamber 12. The regenerating gas entered the heating chamber 12 is heated again and sent into an adsorber 2b through a piping 25 and a valve 7b. The regenerating gas sent into the adsorber 2b heats again the adsorbent 2b and discharged through a valve 5b and piping 26. Consequently, the heating and the regeneration of adsorbent are carried ont by 1st and 2nd heating means.

134. 发明专利

JPH01159568A METHOD OF CONTROLLING OPERATION OF CRYOGENIC LIQUEFYING REFRIGERATOR 失效
公开(公告)号：JPH01159568A
公开(公告)日：1989-06-22
申请号：JP31628587
申请日：1987-12-16
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： SHIBANUMA KIYOSHI , SHIBATA TAKEYORI , MATSUMOTO KOZO , KAJIWARA HIROTAKE , KAWAMURA SHIGETO
IPC分类号： F25B9/02
摘要： PURPOSE: To ensure smooth and efficient operation by controlling the intermediate pressure of an expander at the inlet valve thereof depending on the load of an object to be cooled and controlling the flow rate of high pressure gas being introduced to a cryogenic liquefaction chiller through a Joule-Thomson valve. CONSTITUTION: A refrigeration load signal 27 is delivered from an object 20a-20n to be cooled to a setter 28 and an intermediate pressure set signal 29 of an expander corresponding to the refrigeration load is delivered to a controller 34 for the inlet valve 12 of the expander. At the same time, a high pressure gas flow rate set signal 30 is delivered to a controller 31 for a Joule-Thomson valve(JT valve). The controller 31 controls a JT valve 13 by producing a control signal 33 from a high pressure gas flow rate signal 32 and the signal 30. The controller 34 controls the inlet valve 12 by producing a control signal 36 from an intermediate pressure signal 35 and the signal 29. Consequently, a cryogenic liquefaction chiller can be held easily in a correct operating state for various load conditions of the object 20a-20n resulting in smooth and efficient operation control.

135. 发明专利

JPH01150775A CRYOGENIC REFRIGERANT FEEDER 失效
公开(公告)号：JPH01150775A
公开(公告)日：1989-06-13
申请号：JP30754087
申请日：1987-12-07
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , TAKEI NOBUYUKI
IPC分类号： F25D3/10
摘要： PURPOSE: To provide a highly reliable inexpensive cryogenic refrigerant supplying device which does not cause any failure by providing a control means which switches a flow passage switching means to the atmosphere side when a cryogenic refrigerant flows without being heated to a prescribed temperature after the temperature in a transfer pipe is detected and an object to be cooled is cooled or a power failure occurs. CONSTITUTION: Usually, a cryogenic refrigerant flows to a heater 7 through a three-way valve 10 after cooling an object 3 to be cooled. When the heat load to the object 3 becomes abnormal and such abnormality as the disconnection of the heater 7, etc., occurs, the temperature drop at a normal-temperature pipeline 8 is detected by means of a temperature switch 12 and the cryogenic refrigerant flowing out from the object 3 is made to flow to a cryogenic refrigerant discharge pipe 11 so as to prevent the refrigerant from flowing in the transfer pipeline 8. When a power failure occurs, the temperature switch 12 becomes inoperable, but the three-way valve 10 is always maintained in such a normal state that the valve 10 can be connected to the discharge pipe 11.

136. 发明专利

JPH01150759A METHOD OF CONTROLLING CRYOGENIC LIQUEFYING REFRIGERATOR 失效
公开(公告)号：JPH01150759A
公开(公告)日：1989-06-13
申请号：JP30753287
申请日：1987-12-07
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： SHIBANUMA KIYOSHI , SHIBATA TAKEYORI , MATSUMOTO KOZO , KAJIWARA HIROTAKE
IPC分类号： F25B9/02
摘要： PURPOSE: To ensure smooth and effective operation of a cryogenic temperature liquefying/freezing apparatus by controlling an opening of one of an expander inlet valve and a Joule-Tomson valve under load conditions of an article to be cooled, and further controlling a flow rate of high pressure gas introduced into a cryogenic temperature liquefying/freezing apparatus. CONSTITUTION: Liquefied gas is supplied to articles 20a to 20n through a liquefied gas transfer pipe 16 to absorb a heat load into gas which gas is returned to a cold box 10 and further to a compressor 1 after passage through a low temperature gas return pipe 17. The low temperature gas returning through a return pipe 17 corresponds to freezing loads of the articles 20a to 20n and ordinary temperature gas returning the return pipe 21 corresponds to liquefying loads of the articles 20a to 20n. The freezing loads of the articles 20a to 20n are incorporated into a controller as a freezing load signal 32, whereby a JT valve 13 is adjusted to a corresponding opening with an adjusting signal 33. In contrast, a high pressure gas flow rate introduced into the cold box 10 is incorporated into a controller 35 as a signal 36 and is kept unchanged by controlling an expander inlet valve 12 with an adjusting signal 3.

137. 发明专利

JPH01150756A CRYOGENIC COOLING DEVICE 失效
公开(公告)号：JPH01150756A
公开(公告)日：1989-06-13
申请号：JP30753487
申请日：1987-12-07
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： SHIBANUMA KIYOSHI , MATSUMOTO KOZO , KAJIWARA HIROTAKE , KAWAMURA SHIGETO
IPC分类号： F25B9/00 , F25B9/02 , F25D3/10
摘要： PURPOSE: To realize a smooth and easy operation by providing a control calcula tor for controlling the holding amount of cryogenic liquefied refrigerant to a given quantity and a comparing calculator for comparing it with another control calculator which controls the pressure of a room-temperature refrigerant gas to a given pressure to selectively output the result to a liquefied-gas heater. CONSTITUTION: A liquid level controller 22' performs control calculation such that the input of a heater 20 is increased as the holding amount of liquid helium in a liquid helium tank 8 is increased. A pressure control calculator 30 performs calculation such that the input of the heater 20 is increased when the pressure of a medium-pressure tank 5 is reduced so that the pressure is held above values that hinder the pressure control of a low-pressure helium line 4. The controlled output of the liquid level control calculator 22' and that of the pressure control calculator 30 are input to a comparing calculator 31, which selectively supplies the output that increases the input of the heater 20 to the heater 20.

138. 发明专利

JPH01137162A VERY LOW TEMPERATURE REFRIGERANT RECOVERING DEVICE 失效
公开(公告)号：JPH01137162A
公开(公告)日：1989-05-30
申请号：JP29408387
申请日：1987-11-24
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： SHIBANUMA KIYOSHI , SHIBATA TAKEYORI , MATSUMOTO KOZO , HAYASHI KENJI , KAJIWARA HIROTAKE
IPC分类号： F25B9/02 , F25B9/00 , F25D3/10 , F25D13/00
摘要： PURPOSE:To optimize control of switching of return refrigerant gas, by a method wherein a steady valve is located in a line running from a substance to be cooled through a very low temperature regrigerant carrier piping to a freezer, a precooling valve in a line running from the substance to be cooled to a compressor, the steady valve and the precooling valve are switched and controlled according to the temperature of return refrigerant gas and a valve opening control speed is increased and controlled during control of opening of the steady valve. CONSTITUTION:A control device 11 controls a precooling valve 7 and a steady valve 6 according to the value of an outlet thermometer 10. Namely, when the value of the outlet thermometer 10 exceeds a set value, the steady valve 6 is closed and the precooling valve 7 is fully opened. At a time (a) when the value of the outlet thermometer 10 reduced to a value lower than the set value, the steady valve 6 is opened at a comparatively slow control speed (between (a) and (b)). After a time (b) when the opening of the steady valve 6 is increased to a specified value, a control speed is increased to a relatively high value to open the steady valve 6 (between (b) and (c)). After a time (c) when the opening of the steady valve 6 is increased to a maximum, after the precool valve 7 and the steady valve 6 are held in a fully opened state for a specified time (between (c) and (d)), the precooling valve 7 is rapidly brought into a full opening state, and switching control is completed (at a time (e)).

139. 发明专利

JPH01127876A CRYOGENIC REFRIGERANT TRANSFER PIPING 失效
公开(公告)号：JPH01127876A
公开(公告)日：1989-05-19
申请号：JP28536787
申请日：1987-11-13
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： SHIBATA TAKEYOSHI , SHIBANUMA KIYOSHI , ARAKI MASANORI , MATSUMOTO KOZO , KAWAMURA SHIGETO
IPC分类号： F25B9/00 , F25D3/10
摘要： PURPOSE: To reduce the entire length of a cryotemperature refrigerant transfer pipe and ensure effective transfer by providing a sealed pipe as a piping for transferring a cryotemperature refrigerant to an article to be cooled, and disposing a piping for transferring a heat shielding refrigerant having higher temperature than the cryotemperature refrigerant such that it makes contact with the shielding pipe. CONSTITUTION: A shielding pipe 5 and a cryotemperature refrigerant transfer piping 13 for supplying liquid nitrogen to a cryostat 2 are disposed in a thermal contact state such that the former shielding pipe 5 is cooled with the latter cryotemperature refrigerant transfer piping. The liquid nitrogen is introduced into the cryotemperature refrigerant transfer piping 13 through a refrigerant piping 14 from a liquid nitrogen supply installation 7 to cool the shielding pipe 5 and is guided to the cryostat 2. The gas nitrogen that absorbs a thermal load with the cryostat 2 and hence is gasified is heated to ordinary temperature with a heater 15 and is exhausted to the atmosphere through the piping 16. Hereby, the length of the refrigerant piping 14 kept cold in vacuum is reduced totally, and the need of a refrigerant control system for cooling the shielding pipe 5 is eliminated, and hence effective transfer is ensured.

140. 发明专利

JPH01127861A CRYOGENIC REFRIGERATOR 失效
公开(公告)号：JPH01127861A
公开(公告)日：1989-05-19
申请号：JP28536687
申请日：1987-11-13
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： SHIBATA TAKEYOSHI , MATSUMOTO KOZO , KAJIWARA HIROTAKE
IPC分类号： F25B9/00
摘要： PURPOSE: To properly keep conditions of a cryogenic refrigerant supplied to a freezing load by disposing a supply pipe and a return pipe of a cryogenic temperature refrigerant transfer pipe in a same vacuum heat insulation pipe such that a supply cryogenic temperature refrigerant and a return cryogenic temperature refrigerant make thermal contact with each other, and coupling the supply pipe and the return pipe through a bypass valve. CONSTITUTION: Liquid helium produced in a cryogenic freezing apparatus 1 is branched and supplied after passage through a supply pipe 3, and absorbs a thermal load through freezing loads 5a to 5n, and joins the return pipe 4 and returns to a freezer 1. When only the freezing load 5n is operated as operation conditions, for example, a part of a supply refrigerant is bypassed to the return pipe 4 through bypass valves 14, 15. The bypassed refrigerant flows through the return pipe 4 with lower temperature than the supply refrigerant following lowering of pressure, and heat exchanges with the supply refrigerant through an inner pipe 11. Gas helium in the gasified supply refrigerant flowing through the inner pipe 11 is recondensed with invasion heat, whereby a ratio of the liquid helium in the refrigerant at an inlet of a flow rate control valve 6n is properly kept.

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