FR2247130A5 - Safety system for compressed air producer - compressor is switched off when a resistance is not cooled due to low oil level - Google Patents

Safety system for compressed air producer - compressor is switched off when a resistance is not cooled due to low oil level

Info

Publication number
FR2247130A5
FR2247130A5 FR7336378A FR7336378A FR2247130A5 FR 2247130 A5 FR2247130 A5 FR 2247130A5 FR 7336378 A FR7336378 A FR 7336378A FR 7336378 A FR7336378 A FR 7336378A FR 2247130 A5 FR2247130 A5 FR 2247130A5
Authority
FR
France
Prior art keywords
resistance
oil
compressor
probe
switched
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.)
Expired
Application number
FR7336378A
Other languages
French (fr)
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.)
CREYSSENSAC COMPRESSEURS
Original Assignee
CREYSSENSAC COMPRESSEURS
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 CREYSSENSAC COMPRESSEURS filed Critical CREYSSENSAC COMPRESSEURS
Priority to FR7336378A priority Critical patent/FR2247130A5/en
Application granted granted Critical
Publication of FR2247130A5 publication Critical patent/FR2247130A5/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
    • F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
    • G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels

Abstract

The two stage compressor has a probe screwed into the oil casing at the minimum desirable level of lubricating oil. The probe has a horizontal resistor usually immersed in the oil, the resistor having a high positive temperature coefficient of resistance between 160 deg.C and 150 Ohms and 200 deg.C and 1800 Ohms. The semi-conductor probe is heated by a continuous current but remains cool, due to the dissipation of the heat by the oil, and below 160 deg. Should the oil level fall below the minimum desirable level the probe temperature rises with the resistance to block a transistor circuit. This causes no signal to pass through a relay maintaining the compressor working and also operates an alarm.
FR7336378A 1973-10-03 1973-10-03 Safety system for compressed air producer - compressor is switched off when a resistance is not cooled due to low oil level Expired FR2247130A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7336378A FR2247130A5 (en) 1973-10-03 1973-10-03 Safety system for compressed air producer - compressor is switched off when a resistance is not cooled due to low oil level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7336378A FR2247130A5 (en) 1973-10-03 1973-10-03 Safety system for compressed air producer - compressor is switched off when a resistance is not cooled due to low oil level

Publications (1)

Publication Number Publication Date
FR2247130A5 true FR2247130A5 (en) 1975-05-02

Family

ID=9126273

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7336378A Expired FR2247130A5 (en) 1973-10-03 1973-10-03 Safety system for compressed air producer - compressor is switched off when a resistance is not cooled due to low oil level

Country Status (1)

Country Link
FR (1) FR2247130A5 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415721A1 (en) * 1978-01-30 1979-08-24 Burckhardt Ag Maschf CONTROL DEVICE FOR A COMPRESSOR CYLINDER LUBRICATION PUMP
FR2559797A1 (en) * 1984-02-17 1985-08-23 Esswein Sa Device for controlling the level and temperature of water in a washing machine
US5295359A (en) * 1992-09-21 1994-03-22 National Refrigeration Products Combination fluid level indicator and discharge device
FR2697985A1 (en) * 1992-11-13 1994-05-20 Thirode Grandes Cuisines Poligny Automatic control of fat level in fryer - using electric resistance type temperature sensor inserted in fryer to interrupt power on overheating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415721A1 (en) * 1978-01-30 1979-08-24 Burckhardt Ag Maschf CONTROL DEVICE FOR A COMPRESSOR CYLINDER LUBRICATION PUMP
FR2559797A1 (en) * 1984-02-17 1985-08-23 Esswein Sa Device for controlling the level and temperature of water in a washing machine
US5295359A (en) * 1992-09-21 1994-03-22 National Refrigeration Products Combination fluid level indicator and discharge device
FR2697985A1 (en) * 1992-11-13 1994-05-20 Thirode Grandes Cuisines Poligny Automatic control of fat level in fryer - using electric resistance type temperature sensor inserted in fryer to interrupt power on overheating

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Legal Events

Date Code Title Description
ST Notification of lapse