FI345773A - - Google Patents

Info

Publication number
FI345773A
FI345773A FI3457/73A FI345773A FI345773A FI 345773 A FI345773 A FI 345773A FI 3457/73 A FI3457/73 A FI 3457/73A FI 345773 A FI345773 A FI 345773A FI 345773 A FI345773 A FI 345773A
Authority
FI
Finland
Application number
FI3457/73A
Other languages
Finnish (fi)
Inventor
P Kinnunen
V Lukkarinen
Original Assignee
Upo Oy
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 Upo Oy filed Critical Upo Oy
Priority to FI3457/73A priority Critical patent/FI345773A/fi
Priority to SE7413563A priority patent/SE7413563L/xx
Priority to US05/519,391 priority patent/US3946286A/en
Priority to GB48306/74A priority patent/GB1486436A/en
Priority to DE19742453140 priority patent/DE2453140A1/de
Publication of FI345773A publication Critical patent/FI345773A/fi

Links

Classifications

    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/02—Detecting the presence of frost or condensate
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/11—Sensor to detect if defrost is necessary
    • F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)
FI3457/73A 1973-11-08 1973-11-08 FI345773A (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI3457/73A FI345773A (de) 1973-11-08 1973-11-08
SE7413563A SE7413563L (de) 1973-11-08 1974-10-28
US05/519,391 US3946286A (en) 1973-11-08 1974-10-30 Device for controlling the formation of frost on cooling radiators and the defrosting of the same
GB48306/74A GB1486436A (en) 1973-11-08 1974-11-07 Device for controlling the formation of ice on cooling elements of a refrigeration unit
DE19742453140 DE2453140A1 (de) 1973-11-08 1974-11-08 Vorrichtung zum ueberwachen der bildung und des abtauens von reifbelaegen an kuehlelementen einer kuehlanlage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI3457/73A FI345773A (de) 1973-11-08 1973-11-08

Publications (1)

Publication Number Publication Date
FI345773A true FI345773A (de) 1975-05-09

Family

ID=8508455

Family Applications (1)

Application Number Title Priority Date Filing Date
FI3457/73A FI345773A (de) 1973-11-08 1973-11-08

Country Status (5)

Country Link
US (1) US3946286A (de)
DE (1) DE2453140A1 (de)
FI (1) FI345773A (de)
GB (1) GB1486436A (de)
SE (1) SE7413563L (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593533A (en) * 1974-12-05 1986-06-10 Alsenz Richard H Method and apparatus for detecting and controlling the formation of ice or frost
US4045971A (en) * 1976-03-01 1977-09-06 Emerson Electric Co. Frost detector
DE2720922A1 (de) * 1977-05-10 1978-11-16 Teichmann & Mevs Verfahren und vorrichtung zum automatischen abtauen von kaelteaggregaten
JPS54145049A (en) * 1978-05-02 1979-11-12 Toshiba Corp Refrigerat0r
DE3026256A1 (de) * 1980-07-11 1982-02-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Sensor fuer reifansatz
US4409795A (en) * 1981-04-03 1983-10-18 Russell Coil Company Demand defrost system
DE3175212D1 (en) * 1981-06-26 1986-10-02 Richard H Alsenz Refrigerator defrost control
CH665915A5 (de) * 1981-11-13 1988-06-15 Paul Kovacs Vorrichtung zur ueberwachung der eisbildung.
DE3303054C2 (de) * 1983-01-29 1994-02-10 Ruhrgas Ag Signalgeber zur Steuerung des Abtauvorgangs des Verdampfers einer Wärmepumpe
US4530218A (en) * 1984-02-27 1985-07-23 Whirlpool Corporation Refrigeration apparatus defrost control
US4649713A (en) * 1984-05-21 1987-03-17 Bezek Donald J Microwave ice detector
US4754149A (en) * 1987-01-08 1988-06-28 Scientific Technology, Inc. Optical precipitation gauge which detects scintillations produced by particle movement in the light beam
US5438844A (en) * 1992-07-01 1995-08-08 Gas Research Institute Microprocessor-based controller
US5781115A (en) * 1995-04-03 1998-07-14 Target Microwave Apparatus and method for detection and thickness measurement of coatings over a surface
US6321555B1 (en) * 1999-02-25 2001-11-27 I.R.C.A. S.P.A Industria Resistenze Defrosting device, in particular for refrigeration systems
AU1070101A (en) * 1999-09-15 2001-04-17 Ut-Battelle, Llc Apparatus and method for controlling evaporator coil defrosting
ITRM20050634A1 (it) * 2005-12-19 2007-06-20 Ixfin S P A Sistema per lo sbrinamento automatizzato di un apparato refrigeratore.
JP6498320B2 (ja) * 2016-01-08 2019-04-10 三菱電機株式会社 換気装置及び除霜方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120108A (en) * 1961-03-30 1964-02-04 Gen Motors Corp Refrigerating apparatus including defrost control
US3188828A (en) * 1961-12-04 1965-06-15 Chicago Aerial Ind Inc Photo-electric ice detecting device
US3423596A (en) * 1964-12-30 1969-01-21 Ibm Apparatus wherein a pulsed light beam is interrupted having a high pass filter so that the photocell is responsive only to the leading edge of the light pulse
US3647301A (en) * 1969-01-15 1972-03-07 Oskar Edwin Sturzinger System for ascertaining the accumulation of pulverulent, granular or flaky bulk goods

Also Published As

Publication number Publication date
SE7413563L (de) 1975-05-09
US3946286A (en) 1976-03-23
GB1486436A (en) 1977-09-21
DE2453140A1 (de) 1975-05-15

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