JPS6433473A - Low-temperature refrigerator - Google Patents

Low-temperature refrigerator

Info

Publication number
JPS6433473A
JPS6433473A JP18890387A JP18890387A JPS6433473A JP S6433473 A JPS6433473 A JP S6433473A JP 18890387 A JP18890387 A JP 18890387A JP 18890387 A JP18890387 A JP 18890387A JP S6433473 A JPS6433473 A JP S6433473A
Authority
JP
Japan
Prior art keywords
decompression device
main
point
variable aperture
bypass line
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.)
Pending
Application number
JP18890387A
Other languages
Japanese (ja)
Inventor
Hiroshi Yasuda
Kyuhei Ishihane
Takao Chiaki
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP18890387A priority Critical patent/JPS6433473A/en
Publication of JPS6433473A publication Critical patent/JPS6433473A/en
Pending legal-status Critical Current

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  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PURPOSE: To improve reliability by connecting an intermediate point between a main decompression device and a passage resistance changing means and an intermediate point between the decompression device and a separator with a bypass line to prevent closure by the oil of the main compressor. CONSTITUTION: An electromagnetic operation type variable aperture 11 is connected being interposed between a main decompression device 4 and a heat exchanger 7 and a bypass line 20 is provided between two points A and B while an aperture 10 and a solenoid valve 9 are connected being interposed in the bypass line. The point A is located between the main compression device 4 and the variable aperture 11 and the point B between the decompression device 8 and a separator 6. The operating condition of a refrigeration cycle is automatically monitored by a thermometer and a manometer and as oil approaches a probable point of coagulating onto the main decompression device 4, the solenoid valve 9 is opened by an automatic control means while the resistance of a variable aperture mechanism 11 is increased so that a pressure in piping to the main decompression device 4 from the variable aperture mechanism 11 stays at an intermediate pressure between a high pressure and a low pressure to facilitate the outflow of a hot liquid refrigerant from the high pressure side on the upstream side of the decompression device 8 and thus, the oil clinging to the main decompression device 4 is caused to melt and flow.
JP18890387A 1987-07-30 1987-07-30 Low-temperature refrigerator Pending JPS6433473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18890387A JPS6433473A (en) 1987-07-30 1987-07-30 Low-temperature refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18890387A JPS6433473A (en) 1987-07-30 1987-07-30 Low-temperature refrigerator

Publications (1)

Publication Number Publication Date
JPS6433473A true JPS6433473A (en) 1989-02-03

Family

ID=16231900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18890387A Pending JPS6433473A (en) 1987-07-30 1987-07-30 Low-temperature refrigerator

Country Status (1)

Country Link
JP (1) JPS6433473A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5598209A (en) * 1993-10-20 1997-01-28 Videoconferencing Systems, Inc. Method for automatically adjusting a video conferencing system camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5598209A (en) * 1993-10-20 1997-01-28 Videoconferencing Systems, Inc. Method for automatically adjusting a video conferencing system camera

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