EP0837294B1 - Kühleinrichtung und Verfahren zur Überwachung einer Kühleinrichtung - Google Patents

Kühleinrichtung und Verfahren zur Überwachung einer Kühleinrichtung Download PDF

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Publication number
EP0837294B1
EP0837294B1 EP19970117710 EP97117710A EP0837294B1 EP 0837294 B1 EP0837294 B1 EP 0837294B1 EP 19970117710 EP19970117710 EP 19970117710 EP 97117710 A EP97117710 A EP 97117710A EP 0837294 B1 EP0837294 B1 EP 0837294B1
Authority
EP
European Patent Office
Prior art keywords
refrigerating
monitoring
circuit
temperature
detecting
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 - Lifetime
Application number
EP19970117710
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0837294A3 (de
EP0837294A2 (de
Inventor
Uwe Schwarzpaul
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.)
Dometic GmbH
Original Assignee
Dometic GmbH
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 Dometic GmbH filed Critical Dometic GmbH
Publication of EP0837294A2 publication Critical patent/EP0837294A2/de
Publication of EP0837294A3 publication Critical patent/EP0837294A3/de
Application granted granted Critical
Publication of EP0837294B1 publication Critical patent/EP0837294B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/10—Sorption machines, plants or systems, operating continuously, e.g. absorption type with inert gas
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/008—Alarm devices

Definitions

  • the invention relates to a cooling device and a method for monitoring a cooling device.
  • Such cooling devices are used in households as well as in a slightly smaller version in hotel rooms as a minibar, the latter for reasons of energy saving and because of the lower noise in the hotel room, in which usually also a guest sleeps, are usually designed as absorption refrigerators.
  • compressor chillers usually use a fluorinated hydrocarbon refrigerant, which is disposed of as hazardous waste when the refrigerators are scrapped.
  • the document FR 1 484 466 discloses a Absorberkül Eaton Stretrach
  • Object of the present invention is to provide a cooling device that can respond to incidents of the type mentioned, in particular the cooling circuit turns off to prevent further pollution of the environment. Furthermore, a method for monitoring a cooling device is to be provided with which faults can be determined in a simple manner. The method according to the invention is intended to be applicable to a large number of cooling devices that are manufactured in series, and existing refrigerators should be retrofittable with the monitoring device.
  • control device of a cooling device is provided with a monitoring device, which can detect malfunctions, it is possible to switch off the cooling device, so that the amount of refrigerant emerging from the cooling circuit is limited. If the monitoring device is incorporated into the control device of the cooling device, existing cooling devices without monitoring device can be retrofitted with this, so that the existing cooling devices can be used further.
  • the cooling circuit is formed by an absorption cycle, since these are often used in hotel rooms and there is an increased need for avoidance of accidents.
  • absorption cycles ammonia is often used as refrigerant, which is foul-smelling at a leak and can cause dizziness.
  • a simple and inexpensive embodiment of the monitoring device has a temperature sensor, with which an operating temperature is detected at the cooling circuit.
  • the temperature sensor is positioned on the evaporator of the absorption cycle, since there quickly occurs a deviation from the predetermined temperature in a fault. This also has the advantage that an existing cooling device only has to be provided with an additional sensor which is connected to the monitoring device.
  • a temperature sensor for determining the ambient temperature and a temperature sensor for determining the temperature in the refrigerator so that the monitoring device has greater security in the display of incidents.
  • the reliability of the fault message is further increased if in addition a sensor is provided on a door closing the refrigerator, which emits a signal when the door is open.
  • the monitoring device can distinguish between a state in which the door is opened or closed, so that the control device is aligned accordingly.
  • a float known per se can be provided in the reservoir.
  • Another possibility for supplying the monitoring device with data that can be used to conclude an accident is the provision of means for detecting the pressure in the cooling circuit.
  • the temperature is determined at at least one point on the cooling circuit and with a predetermined Temperature compared depending on a set cooling capacity, so that is switched off in a deviation of the two temperature values from each other from a predetermined range of the cooling circuit.
  • the state of the refrigerator closing door is determined, so that this malfunction of the control device can be displayed separately, which preferably turns on a signal lamp on the cooling device or an audible signal to alert the operator to the open door.
  • FIG. 1 shows schematically a cooling circuit of a cooling device, which is designed as absorption cycle.
  • An expeller 1 is formed as a tube and is heated by an electric heating pipe 3 and a gas heating pipe 4. It is also possible to provide only one heating tube 3 or only one gas heating tube 4.
  • a pump tube 2 is concentrically arranged, in which there is a rich ammonia-water solution. By heating the generator 1 and the pump tube 2, the boiling point of the ammonia, which is lower than that of the water, is exceeded, so that ammonia vapor in the pump tube is expelled upward due to the density differences.
  • the pump tube 2 acts as a thermosiphon pump because between emerging vapor bubbles in the pump tube 2 small amounts of ammonia degassed and thus poor solution is included and performed in the pump tube 2 upwards.
  • At the top of the Pump tube 2 exits the poor solution from the pump tube 2 and runs on the outside of the pump tube 2 in the expeller 1 down.
  • the gaseous ammonia leaving the pump tube 2 is led to a condenser 5, which is provided with cooling fins 6 for heat emission. After passing through a water separator, the ammonia vapor in the condenser 5 is condensed.
  • the actual cooling capacity is achieved in the subsequent evaporation of the ammonia.
  • the liquid ammonia is fed in an ammonia tube 7 to the evaporator 9, which is designed as a coiled tube evaporator with two or three concentrically nested tubes.
  • the liquid ammonia is cooled to near the lowest evaporator temperature before injection into the evaporator.
  • an auxiliary gas for example hydrogen, contained in the evaporator 9, so that the phase transition is accelerated.
  • a temperature sensor 19 is provided, with which the evaporator temperature is measured.
  • hydrogen is supplied through a hydrogen pipe 11.
  • the absorber 12 is designed as a coil absorber, which is operated in countercurrent process, wherein the heavy, loaded with ammonia hydrogen flows from the gas heat exchanger 10 via a return pipe 13 into a lower reservoir 15 with a connected pipe coil absorber 12th
  • the ammonia is absorbed by the ammonia solution contained in the reservoir 15 and absorber 12, so that the hydrogen from the subsequent enriched ammonia-hydrogen mixture through the absorber 12 in countercurrent to the solution is led upwards.
  • a compensation tube 8 and a poor solution tube 14 is provided for pressure equalization between the lines a compensation tube 8 and a poor solution tube 14 is provided.
  • the reservoir 15 is connected at its lower portion to a supply line 17 which is concentrically surrounded in a heat exchanger tube. In the heat exchanger tube 16, poor solution is supplied from the generator 1 and rich solution in the supply line 17 is discharged.
  • the monitoring of the cooling device is initially via the detection of the temperature at the evaporator 9 via the temperature sensor 19.
  • the determined value is passed on to the control device of the cooling device and compared in dependence on the set at the expeller 1 heating power with a predetermined reference value. If the evaporator temperature deviates to a certain extent above the predetermined value due to a fault, the control device of the cooling device deactivates the heating means on the expeller, so that no further ammonia is vaporized and the amount of exiting ammonia is limited.
  • the switching off of the cooling device can be displayed by a control lamp.
  • the cooling device has a contact sensor, which determines whether a door of the cooling device is in the closed or opened state.
  • the monitoring device takes into account the state of the open door, so that the accident monitoring does not respond to short-term temperature changes.
  • a pressure sensor is further provided on the reservoir 15 to report a possible pressure drop in the cooling circuit to the monitoring device.
  • a float not shown, for determining the level height is provided in the reservoir 15, wherein the level height is passed to the monitoring device.
  • the monitoring device compares the incoming data with predetermined values and switches off the heating devices 3 or 4 if individual data or their combination indicate an accident.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
EP19970117710 1996-10-16 1997-10-13 Kühleinrichtung und Verfahren zur Überwachung einer Kühleinrichtung Expired - Lifetime EP0837294B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996142745 DE19642745C2 (de) 1996-10-16 1996-10-16 Absorberkühlschrank
DE19642745 1996-10-16

Publications (3)

Publication Number Publication Date
EP0837294A2 EP0837294A2 (de) 1998-04-22
EP0837294A3 EP0837294A3 (de) 2001-12-05
EP0837294B1 true EP0837294B1 (de) 2006-04-05

Family

ID=7808952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970117710 Expired - Lifetime EP0837294B1 (de) 1996-10-16 1997-10-13 Kühleinrichtung und Verfahren zur Überwachung einer Kühleinrichtung

Country Status (4)

Country Link
EP (1) EP0837294B1 (es)
JP (1) JPH10122712A (es)
DE (2) DE19642745C2 (es)
ES (1) ES2117611T3 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA57849C2 (uk) * 1998-09-04 2003-07-15 Герхард КУНЦЕ Абсорбційна холодильна машина
DE10161181B4 (de) * 2001-12-13 2004-03-18 Buderus Heiztechnik Gmbh Verfahren zur Regelung einer Diffusionsabsorptionsanlage
US7050888B2 (en) * 2003-11-26 2006-05-23 Norcold, Inc. Control system and method of controlling ammonium absorption refrigerators
CN102384634A (zh) * 2011-06-24 2012-03-21 合肥美的荣事达电冰箱有限公司 制冷设备、用于其的防凝露加热器控制装置及控制方法
CN103574993B (zh) * 2012-07-27 2016-08-10 青岛德莱维电器有限公司 一种冰箱制冷系统的制备方法
US10746586B2 (en) 2015-05-28 2020-08-18 Sonicu, Llc Tank-in-tank container fill level indicator
US10745263B2 (en) 2015-05-28 2020-08-18 Sonicu, Llc Container fill level indication system using a machine learning algorithm
CN110094931B (zh) * 2019-05-30 2021-08-17 海信（山东）冰箱有限公司 一种冰箱温控方法及装置、冰箱
USD1002676S1 (en) 2019-08-30 2023-10-24 Dometic Sweden Ab Appliance
USD1026969S1 (en) 2020-08-31 2024-05-14 Dometic Sweden Ab Refrigerator

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1484466A (es) * 1967-09-15
DE2135066C3 (de) * 1971-07-14 1975-02-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektronische Regeleinrichtung für Absorber-Kühlgeräte
DE3133686A1 (de) * 1981-08-26 1983-03-17 Lattek, Gabriele, 4300 Essen Kuehlschrank od.dgl. fuer reisemobile, wohnwagen u. aehnl.
JPH02208460A (ja) * 1989-02-03 1990-08-20 Sanyo Electric Co Ltd 吸収冷凍機の運転監視装置
DE4012841A1 (de) * 1990-04-23 1991-10-24 Behr Gmbh & Co Klima- oder kaelteanlage
DE4113170A1 (de) * 1990-05-01 1991-11-14 Loh Kg Rittal Werk Kuehlgeraet fuer einen schaltschrank
US5156013A (en) * 1990-05-29 1992-10-20 Sanyo Electric Co., Ltd. Control device for absorption refrigerator
GB2254452B (en) * 1991-04-04 1994-11-02 Total Temperature Control Limi Control of refrigerators and freezers
JPH055564A (ja) * 1991-06-28 1993-01-14 Toshiba Corp 空気調和機
JP3258684B2 (ja) * 1991-12-06 2002-02-18 三洋電機株式会社 吸収式冷凍機の異常検出装置
DE4330923C1 (de) * 1993-09-13 1995-03-23 Loh Kg Rittal Werk Kühlgerät für einen Schaltschrank oder ein Elektronikgehäuse
JP3184034B2 (ja) * 1993-12-16 2001-07-09 株式会社荏原製作所 吸収冷温水機の制御方法
DE19516627A1 (de) * 1995-05-05 1996-11-07 Ranco Inc Verfahren und Vorrichtung zur Regelung eines Prozesses

Also Published As

Publication number Publication date
ES2117611T3 (es) 2006-10-16
ES2117611T1 (es) 1998-08-16
DE19642745A1 (de) 1998-04-30
DE59712611D1 (de) 2006-05-18
EP0837294A3 (de) 2001-12-05
JPH10122712A (ja) 1998-05-15
EP0837294A2 (de) 1998-04-22
DE19642745C2 (de) 2000-09-14

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