EP0436084A1 - Helium-Gas-Kompressionsgerät - Google Patents

Helium-Gas-Kompressionsgerät Download PDF

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Publication number
EP0436084A1
EP0436084A1 EP90120714A EP90120714A EP0436084A1 EP 0436084 A1 EP0436084 A1 EP 0436084A1 EP 90120714 A EP90120714 A EP 90120714A EP 90120714 A EP90120714 A EP 90120714A EP 0436084 A1 EP0436084 A1 EP 0436084A1
Authority
EP
European Patent Office
Prior art keywords
pressure
gas passage
helium
low
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90120714A
Other languages
English (en)
French (fr)
Inventor
Fumihiro Kotaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Seiki KK
Original Assignee
Seiko Seiki KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP29525689A external-priority patent/JPH03156255A/ja
Priority claimed from JP7219190U external-priority patent/JPH0429774U/ja
Priority claimed from JP7219290U external-priority patent/JPH0429775U/ja
Application filed by Seiko Seiki KK filed Critical Seiko Seiki KK
Publication of EP0436084A1 publication Critical patent/EP0436084A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • F17C2221/017—Helium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0358—Heat exchange with the fluid by cooling by expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F17C2250/0434—Pressure difference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0142—Applications for fluid transport or storage placed underground
    • F17C2270/0144—Type of cavity

Definitions

  • the present invention relates to a helium gas compressing apparatus used in a helium refrigerating machine and more particularly to a helium gas compressing apparatus which is capable of adjusting a pressure difference between a supply gas to the helium refrigerating machine and a return gas therefrom.
  • a helium gas compressing apparatus generally has a compressor 1 for compressing helium gas.
  • the compressor 1 has its low-pressure suction side 1a connected to a low-pressure discharge side 3a of a helium refrigerating machine 3 via a low-pressure gas passage 2 while a high-pressure delivery side 1b of the compressor 1 is connected to a high-pressure supply side 3b of the helium refrigerating machine 3 through a high-pressure gas passage 4.
  • an oil separator 5 which is connected to the low-pressure gas passage 2 via an oil return path 7.
  • the pressure retaining valve 8 is intended to determine the pressure difference (or braking pressure) between the pressure (high pressure) in the high-pressure gas passage 4 and that (low pressure) in the low-pressure gas passage 2. That is, the pressure difference is determined by a preset spring pressure of a spring installed in the pressure retaining valve 8. A part of the high pressure in the high-pressure gas passage 4 flows into the low-pressure gas passage 2 through the path 9 incorporating the pressure retaining valve 8 to keep this pressure difference constant.
  • the path 11 in which the solenoid valve 10 is installed works as follows. Immediately after the helium gas compressing apparatus stops, the solenoid valve 10 is switched from a closed to an open state to increase the pressure at the low-pressure discharge side 3a of the helium refrigerating machine 3 so that oil in the oil separator 5 and in the compressor 1 will not flow back to the helium refrigerating machine 3 through the low-pressure gas passage 2. The oil backflow is also prevented by a check valve 12.
  • a pressure switch 13 monitors the pressures in the low-pressure suction side la and the high-pressure delivery side 1b of the compressor 1.
  • a thermostat 14 monitors the temperature of a gas in the high-pressure gas passage 4.
  • Pressure gauges 15, 16 monitor the pressures in the high-pressure gas passage 4 and the low-pressure gas passage 2, respectively.
  • a safety valve 17 is designed to release excess gas from the high-pressure gas passage 4 in times of emergency.
  • the helium gas is supplied into the low-pressure gas passage 2 through a charge valve 18.
  • the helium gas in the form of oil mist compressed by the compressor 1 to a high pressure is supplied from the high-pressure delivery side 1b of the compressor 1 into the high-pressure gas passage 4 and then cooled by a cooling fan 19 down to a normal temperature.
  • the cooled gas now passes through the compressor 1 to cool the oil therein and is then cooled again by the fan to the normal temperature on its way to the oil separator 5, which is installed in the high-pressure gas passage 4.
  • the high-pressure helium gas in the form of oil mist is separated into high-pressure helium gas and oil.
  • the high-pressure helium gas thus extracted by the oil separator 5 is fed through the high-pressure gas passage 4 to an oil adsorber 20 where the gas is further removed of residual oil contained therein, before being supplied to the high-pressure supply side 3b of the helium refrigerating machine 3.
  • the high-pressure helium gas supplied to the refrigerating machine 3 is hereafter referred to as a supply gas.
  • the supply gas fed to the helium refrigerating machine 3 is returned from, the low-pressure discharge side 3a of the refrigerating machine 3 into the low-pressure gas passage 2.
  • the helium gas returned to the low-pressure gas passage 2 is hereafter referred to as a return gas.
  • the return gas flows through the check valve 12 and a strainer 21 to the low-pressure suction side 1a of the compressor 1 where it is compressed again into a high-pressure helium gas in the form of oil mist.
  • the oil separated by the oil separator 5 is passed through a capillary tube 6 to meter or restrict the oil flow to a predetermined amount, which is then fed to the low-pressure gas passage 2, for which the oil flows through the strainer 21 to the low-pressure suction side 1a of the compressor 1 and into the compressor 1.
  • the pressure retaining valve 8 that determines the pressure difference (braking pressure) between the supply gas in the high-pressure gas passage 4 and the return gas in the low-pressure gas passage 2 operates to allow a part of the high-pressure gas in the high-pressure gas passage 4 to flow into the low-pressure gas passage 2 so that the pressure difference determined based on the spring pressure of the spring installed in the pressure retaining valve 8 is maintained.
  • the pressure retaining valve 8 which determines the pressure difference (braking pressure) between the supply gas in the high-pressure gas passage 4 and the return gas in the low-pressure gas passage 2, is operated by means of the spring pressure of the preset spring installed therein, and it does not have a means to adjust the pressure difference. Hence the pressure difference is fixed and it is structurally impossible to change the preset pressure difference from outside.
  • the following problem arises with the conventional helium gas compressing apparatus of the above construction.
  • In cannot meet such user demands as making in-service adjustments on the pressure difference in the helium gas compressing apparatus according to power consumption of the apparatus and to specifications involving the refrigerating capability of the helium refrigerating machine. Both the power consumption and the refrigerating capability depend on the magnitude of the pressure difference. Because of the inability to make fine adjustments on the pressure difference, a single apparatus cannot meet varying specifications and power consumptions. In other words, two or more helium gas compressing apparatuses are required to accommodate such demands.
  • the helium gas compressing apparatus of this invention comprises: a compressor for compressing a helium gas; a low-pressure gas passage connecting a low-pressure suction side of the compressor and a low-pressure discharge side of a helium refrigerating machine; a high-pressure gas passage connecting a high-pressure delivery side of the compressor and a high-pressure supply side of the helium refrigerating machine; an oil separator installed in the high-pressure gas passage; a pressure retaining valve installed in a path between the high-pressure gas passage and the low-pressure gas passage to determine a pressure difference between the low- and high-pressure gas passages; an oil return path connecting the oil separator and the low-pressure gas passage, said oil return path having a first branch path and a second branch path; a capillary tube installed in one of the two branch paths of the oil return path; and an adjust valve installed in the other branch path of the oil return path to adjust the pressure difference between a supply gas in the high-pressure gas passage and a return gas
  • This invention further comprises open-close control valve connected in series with the adjust valve.
  • the adjust valve comprises automatic adjust valve controlled by a programmed controller.
  • the oil separated by the oil separator 5 installed in the high-pressure gas passage 4 and a part of the supply gas in the high-pressure gas passage 4 are led into the low-pressure gas passage 2 through a capillary tube 6 and an adjust valve 32 that are installed in a first branch path 30 and a second branch path 31, respectively, the first and second branch paths 30, 31 forming an oil return path 7.
  • the capillary tube 6, adjust valve 32 and pressure retaining valve 8 work in combination to determine the pressure difference between the supply gas in the high-pressure gas passage 4 and the return gas in the low-pressure gas passage 2, with the pressure difference being adjusted by the opening of the adjust valve 32.
  • the open-close control valve In the helium gas compressing apparatus with the above mentioned open-close control valve, immediately after the apparatus is started it is possible to cool the refrigerating machine rapidly at the maximum pressure difference with only the pressure retaining valve in operation by closing the open-close control valve connected in series with the adjust valve. When the temperature has lowered to a specified cooling temperature, the open-close control valve is fully opened to bring the preset adjust valve into operation, thus allowing the pressure difference to be promptly changed to the minimum required valve.
  • a sensor detects that the cooling section of the helium refrigerating machine has not reached the predetermined cooling temperature.
  • the programmed controller controls the automatic adjust valve to the fully closed state, rapidly cooling the refrigerating machine at the maximum pressure difference with only the pressure retaining valve in operation.
  • the programmed controller opens the automatic adjust valve to the preset opening.
  • a compressor 1 for compressing a helium gas is connected with one end of a low-pressure gas passage 2 and with one end of a high-pressure gas passage 4 in which an oil separator 5 is installed.
  • the other ends of these passages 2, 4 are connected to a helium refrigerating machine 3.
  • the oil separator 5 and the low-pressure gas passage 2 are interconnected through an oil return path 7, which has a first branch path 30 and a second branch path 31.
  • the first branch path 30 contains a capillary tube 6 while the second branch path 31 has an adjust valve 32.
  • the adjust valve 32 is intended to adjust the pressure difference between the supply gas in the high-pressure gas passage 4 and the return gas in the low-pressure gas passage 2.
  • the oil separated by the oil separator 5 arranged in the high-pressure gas passage 4 and a part of the supply gas are fed to the low-pressure gas passage 2 via the oil return path 7, which is made up of the two passages --- the first and second branch paths 30, 31 that have the capillary tube 6 and the adjust valve 31, respectively.
  • Figure 3 shows the pressure differences that become smaller as the adjust valve 32 is gradually opened from the fully closed state.
  • the oil separator in the high-pressure gas passage 4 is connected to the low-pressure gas passage 2; the oil return path 7 which consists of the first and second branch paths 30, 31 is connected between the high- and low-pressure passages 2, 4; the capillary tube 6 is installed in the first branch path 30; and the adjust valve 32 is installed in the second branch path 31 to adjust the pressure difference between the supply gas in the high-pressure gas passage 4 and the return gas in the low-pressure gas passage 2. Because of this configuration, the adjust valve 32 can be manipulated from outside to a desired opening so that the pressure difference between the supply gas in the high-pressure gas passage 4 and the return gas in the low-pressure gas passage 2 can be adjusted according to the opening of the adjust valve 32.
  • the helium gas compressing apparatus of this invention When applied to a gas-driven helium refrigerating machine, the helium gas compressing apparatus of this invention is able to minimize impacts and vibrations produced in the refrigerating machine, by slightly changing the pressure difference to reduce the operating power of the refrigerating machine.
  • adjust valve installed in the second branch path
  • the adjust valve may also be installed in a branch of the path, connected between the high- and low-pressure gas passages, that has the pressure retaining valve or in a branch of the path having the solenoid valve.
  • the oil return path 7 is provided with a solenoid valve 34 (open-close control valve) connected in series with the adjust valve 32 and in parallel with the capillary tube 6.
  • the solenoid valve 34 is driven by an output signal from a timer or a temperature sensor that monitors the temperature of the cooling section of the refrigerating machine. (The timer and the temperature sensor are not shown.)
  • the helium refrigerating machine 3 can be quickly cooled at the maximum pressure difference with only the pressure retaining valve 8 in operation by closing the solenoid valve 34 serially connected with the adjust valve 32.
  • the solenoid valve 34 is fully opened automatically by an output from the timer or the temperature sensor to activate the preset adjust valve. This combined operation of the pressure retaining valve 8 and the adjust valve 32 can cause an immediate change in the pressure difference to a minimum required value.
  • the adjust valve 32 which is preset to an optimum opening, is maintained at that opening at all times, so that it is possible to realize the optimum pressure difference as soon as the refrigerating machine 3 reaches the specified temperature. This in turn prevents excessive cooling of the refrigerating machine 3 below that temperature and reduces vibrations, noise and operating power, significantly improving the operability of the helium gas compressing apparatus.
  • the capillary tube 6 is installed in the bypass path 30, and the adjust valve 32 and the solenoid valve 34 are installed in the oil return path 7, the same result can also be obtained if the capillary tube 6 is put in the oil return path 7, and the adjust valve 32 and the solenoid valve 34 are arranged in the bypass path 30.
  • the above embodiment has the adjust valve 32 and the solenoid valve 34 connected in parallel with the capillary tube 6, it is possible to form a bypass path in the gas return path 9 and put both of them 32, 34 in the bypass path in parallel with the pressure retaining valve 8.
  • the gas return path 11 may be provided with a bypass path, in which the adjust valve 32 and the solenoid valve 34 are installed so that they are connected in parallel with the solenoid valve 10.
  • an oil separator 5 is connected to a low-pressure gas passage 2 via an oil return path 7 having a parallel bypass path 30.
  • a capillary tube 6 is installed in the bypass path 30, and a needle valve 32 (automatic adjust valve) which is driven by a step-motor 34 and connected in parallel with the capillary tube 6 is arranged in the oil return path 7.
  • the cooling section of the helium gas refrigerating machine 3 is fitted with a sensor 36 that detects the temperature of the cooling section.
  • a detection signal output from the sensor 36 is fed to a controller 38 which, according to the detection signal and a program ROM 40, controls by way of the step-motor 34 the opening of the needle valve 32.
  • the helium gas compressing apparatus immediately after the apparatus is started the sensor 36 detects that the cooling section of the helium refrigerating machine 3 has not reached the predetermined cooling temperature. Based on the detection signal of the sensor 36, the controller 38 controls the step-motor 34 to fully close the needle valve 32. As a result, the helium gas compressing apparatus can rapidly cool the helium refrigerating machine 3 at the maximum pressure difference with only the pressure retaining valve 8 in operation. Then, when the sensor 36 detects that the cooling section of the helium refrigerating machine 3 has lowered to the predetermined cooling temperature, the controller 38, according to the detection signal of the sensor 36, controls the step-motor 34 to open the needle valve 32 to a specified opening, which was preset in ROM. The combined operation of the needle valve 32 and the pressure retaining valve 8 now enables the pressure difference to be immediately changed to the minimum required value.
  • the needle valve 32 can automatically be operated by the controller 38, there is no need to manually operate the adjust valve 32 during operation each time the apparatus is energized as with the conventional apparatus. Further, by storing the desired opening of the needle valve 32 in the ROM beforehand, it is always possible to instantly open the needle valve 32 to the optimum degree, allowing the pressure difference to be immediately set to the optimum value as soon as the helium refrigerating machine 3 has reached the specified temperature. This in turn prevents excessive cooling of the helium refrigerating machine 3 below that temperature and also reduces vibrations, noise and operating power, substantially improving the operability of the helium gas compressing apparatus.
  • the capillary tube 6 is provided in the bypass path 30 and the needle valve 32 driven by the step-motor 34 is installed in the oil return path 7, the same result can also be obtained if the capillary tube 6 is arranged in the oil return path 7 and the needle valve 32 in the bypass path 30.
  • the needle valve 32 driven by the step-motor 34 is provided in parallel with the capillary tube 6, it is possible to form a bypass path in the gas return path 9 and arrange the needle valve 32 in the bypass path in parallel with the pressure retaining valve 8 or to form a bypass path in the gas return path 11 and install it in that bypass path in parallel with the solenoid valve 10.
  • the helium gas compressing apparatus of this invention is constructed in such a manner that the oil separator in the high-pressure gas passage is connected to the low-pressure gas passage; that the oil return path having the first and second branch paths is provided between the high- and low-pressure gas passages; that the capillary tube is installed in one of the two branch paths; and that the adjust valve is installed in the other branch path to adjust the pressure difference between the supply gas in the high-pressure gas passage and the return gas in the low-pressure gas passage.
  • the adjust valve can be manipulated form outside to make fine adjustments on the pressure difference or change it to a desired value with each even during operation of the apparatus, thereby adjusting the refrigerating capability of the helium refrigerating machine and the power consumption of the helium gas compressing apparatus. This in turn makes it possible for a wide range of refrigerating capability and power consumption.
  • the helium gas compressing apparatus of this invention can meet the requirements for reducing impacts and vibrations produced in the refrigerating machine, by slightly adjusting the pressure difference to reduce the operating power of the refrigerating machine.
  • the apparatus therefore has the advantage of an expanded range of capability.
  • this invention has the following advantages. Immediately after the start of the apparatus, the pressure difference is set to the maximum to cool the refrigerating machine to a predetermined temperature in the shortest possible time. Once the refrigerating machine has been cooled to the predetermined temperature, the pressure difference is immediately changed to the minimum required value to prevent excessive cooling below that temperature and also reduce vibrations, noise and operating power. This results in a substantial improvement in the operability of the helium gas compressing apparatus.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP90120714A 1989-11-14 1990-10-29 Helium-Gas-Kompressionsgerät Withdrawn EP0436084A1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP29525689A JPH03156255A (ja) 1989-11-14 1989-11-14 ヘリウムガス圧縮装置
JP295256/89 1989-11-14
JP72191/90U 1990-07-05
JP7219190U JPH0429774U (de) 1990-07-05 1990-07-05
JP7219290U JPH0429775U (de) 1990-07-05 1990-07-05
JP72192/90U 1991-07-05

Publications (1)

Publication Number Publication Date
EP0436084A1 true EP0436084A1 (de) 1991-07-10

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ID=27300886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120714A Withdrawn EP0436084A1 (de) 1989-11-14 1990-10-29 Helium-Gas-Kompressionsgerät

Country Status (1)

Country Link
EP (1) EP0436084A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004016997A1 (en) * 2002-08-17 2004-02-26 Oxford Magnet Technology Oil carry-over prevention from helium gas compressor
CN108194400A (zh) * 2018-03-06 2018-06-22 哈尔滨广瀚燃气轮机有限公司 一种以氦气为工质的闭式循环压气机试验台
FR3104670A1 (fr) * 2019-12-17 2021-06-18 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dispositif et un procédé de remplissage de réservoirs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028217A1 (de) * 1980-07-25 1982-02-18 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Einrichtung zur erzeugung tiefer temperaturen
US4462219A (en) * 1981-05-13 1984-07-31 Tokyo Shibaura Denki Kabushiki Kaisha Refrigeration system
US4718442A (en) * 1986-02-27 1988-01-12 Helix Technology Corporation Cryogenic refrigerator compressor with externally adjustable by-pass/relief valve
US4949546A (en) * 1988-11-14 1990-08-21 Helix Technology Corporation Compact heat exchanger for a cryogenic refrigerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028217A1 (de) * 1980-07-25 1982-02-18 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Einrichtung zur erzeugung tiefer temperaturen
US4462219A (en) * 1981-05-13 1984-07-31 Tokyo Shibaura Denki Kabushiki Kaisha Refrigeration system
US4718442A (en) * 1986-02-27 1988-01-12 Helix Technology Corporation Cryogenic refrigerator compressor with externally adjustable by-pass/relief valve
US4949546A (en) * 1988-11-14 1990-08-21 Helix Technology Corporation Compact heat exchanger for a cryogenic refrigerator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004016997A1 (en) * 2002-08-17 2004-02-26 Oxford Magnet Technology Oil carry-over prevention from helium gas compressor
GB2408071A (en) * 2002-08-17 2005-05-18 Siemens Magnet Technology Ltd Pressure relief valve for a helium gas compressor
GB2408071B (en) * 2002-08-17 2005-10-19 Siemens Magnet Technology Ltd Pressure relief valve for a helium gas compressor
CN108194400A (zh) * 2018-03-06 2018-06-22 哈尔滨广瀚燃气轮机有限公司 一种以氦气为工质的闭式循环压气机试验台
FR3104670A1 (fr) * 2019-12-17 2021-06-18 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dispositif et un procédé de remplissage de réservoirs
WO2021121802A1 (fr) * 2019-12-17 2021-06-24 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dispositif et un procédé de remplissage de réservoirs

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