EP0838644B1 - Procédé et dispositif pour dégivrer un refroidisseur d'une installation de réfrigération - Google Patents

Procédé et dispositif pour dégivrer un refroidisseur d'une installation de réfrigération Download PDF

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Publication number
EP0838644B1
EP0838644B1 EP97118534A EP97118534A EP0838644B1 EP 0838644 B1 EP0838644 B1 EP 0838644B1 EP 97118534 A EP97118534 A EP 97118534A EP 97118534 A EP97118534 A EP 97118534A EP 0838644 B1 EP0838644 B1 EP 0838644B1
Authority
EP
European Patent Office
Prior art keywords
coolant
cooler
cooling apparatus
defrosting
refrigerating plant
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
EP97118534A
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German (de)
English (en)
Other versions
EP0838644A2 (fr
EP0838644A3 (fr
Inventor
Friedhelm Meyer
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.)
Individual
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Individual
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Publication date
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Publication of EP0838644A2 publication Critical patent/EP0838644A2/fr
Publication of EP0838644A3 publication Critical patent/EP0838644A3/fr
Application granted granted Critical
Publication of EP0838644B1 publication Critical patent/EP0838644B1/fr
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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25D21/06—Removing frost
    • 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
    • F25D21/06—Removing frost
    • F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system

Definitions

  • the invention relates to a method for Defrosting a cooler in a refrigeration system, the cooler by a coolant such as cold brine or the like.
  • the invention further relates to a refrigeration system according to the Preamble of claim 2.
  • Such a method and such systems are e.g. known from US-A-3,675,441.
  • Direct evaporators are electric or with hot gas defrosted.
  • Electric defrost heaters have high power losses, because the surface of the electric heating elements is approx. 300 ° C hot becomes.
  • the cooling point temperature is thereby during the defrosting process increased and must be after the end of defrosting with the new one Cooling process can be cooled down again. This means one additional energy input.
  • Hot gas defrosting processes are inexpensive in practice, however, it can be very unstable and it can freeze if the ice from the radiator fins heats up too quickly be blown off so that pieces of ice (residual ice) in small Clearance in front of the radiator fins without heat-conductive contact remain. Residual ice that is not in contact with the radiator fins cannot be further defrosted because of the heat transfer is missing.
  • the temperature at the end of the defrost is also on big problem because the measurement by the temperature sensor for the end of the defrost is only carried out selectively on the air cooler fins can. Through different temperature layers, too There is strong ice formation where the temperature sensor for the Defrost end is not placed.
  • the invention is based, a method and a task To design a refrigeration system of the type specified at the outset so that the defrosting process requires considerably less energy.
  • This object is achieved in that only that coolant located in the cooler by means of a Coolant circuit of the refrigeration system closed bypass line passed, heated therein and passed through the cooler. On this way it only needs. a reduced heat input compared to the known methods, because only that in the cooler located coolant needs to be heated to the Defrosting process, with heat loss to the pipe system outside the cooler can be avoided. Overall, the heating of the only in the cooler Giving coolant significantly saved energy over the known Method.
  • the right temperature for the end of defrosting can be easily determined by placing a temperature probe in the bypass line is used.
  • Fig. 1 shows a part of a refrigeration system a schematically illustrated cooler 1 in the direction of the arrow a coolant such as cold brine or the like flows through is and is arranged in a housing 2 in which a blower 3 is provided, the air through the cooler or its cooling fins blows.
  • a coolant such as cold brine or the like flows through
  • a the cooler bypass line 5 connected at 25 and 26, on which a heat exchanger 6 is arranged, through which Coolant in the bypass line 5 can be heated.
  • a pump 7 is arranged in the Bypass line 5.
  • a Shutoff valve 8 arranged in the coolant line 4 so that Cooler with the bypass line 5 compared to that not shown Coolant circuit can be shut off.
  • a corresponding one Shut-off valve can also be located downstream of the cooler 1 and the Branch of the bypass line 5 can be arranged.
  • At 9 is a drip pan with a drain 10-for the defrost water indicated.
  • a water heater can also be used or another heating device can be provided by means of the the coolant flowing through the bypass line 5 are heated can.
  • a temperature limiter is indicated, which Heat supply to the coolant to a certain temperature value limited.
  • Fig. 2 shows an immersion sleeve 16, according to the device Fig. 1 on the second branch 26 of the bypass line 5 from the Coolant line 4 for receiving a temperature measuring probe is used to control the temperature of the circulating through the bypass To determine coolant.
  • Fig. 3 shows a modified embodiment of the arrangement Fig. 1, wherein the bypass line 5 through the condensation pan 9 runs to thaw ice located there and thus the defrost water can drain freely at 10 and no further freezes.
  • Fig. 4 shows in a cross section a freezer island, as they used for example in department stores for the presentation of frozen goods becomes.
  • the outer insulation is U-shaped in cross section Designated housing 28 which to form a Cooling air circuit is hollow and in the upper area with Air outlet and inlet slots 29 is provided.
  • a cooler 31 is arranged, by means of which a Blower 32 air is conveyed, the housing in the direction of the arrow 28 flows through and between the slots 29 a cooling air curtain 33 forms over the goods to be cooled.
  • a cooling air curtain 33 forms over the goods to be cooled.
  • coolers are provided in a refrigeration system
  • the Coolant supplied via common supply lines be, the defrosting device described on each individual cooler provided immediately, so that cooler and Defrosting device form a thermal unit, even if the defrost circuit is removably attached to the cooler, as with the embodiment of FIG. 4th
  • the described embodiments give one rapid defrosting process, especially heating the goods is avoided in frozen food gondolas. Another advantage is that no water vapor forms during the defrosting process and saved up to 75% energy costs during the defrosting process can be. The heating connection values are low, so that current peaks are avoided.
  • the Circulation of the warm brine during the defrosting process is clear Determination of the end of defrost temperature. A residual ice formation will not permitted by the described defrosting device on the air cooler, so that a constant cooling capacity in cooling mode is achieved. Finally, described by the Defrosting device relieves the environment in that less Primary energy is used.
  • Fig. 4 can be between heater 6 and terminal 26
  • Check valve can be provided in line 5 to a To prevent a short circuit between the defrost circuit and the cooling circuit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Defrosting Systems (AREA)

Claims (8)

  1. Procédé de dégriver un refrigérateur (1) respectivement échangeur de chaleur dans une installation frigorifique ayant une circulation de réfrigérant, le réfrigérateur étant traversé par un réfrigérant comme eau salée froide,
    caractérisé en ce que
    le refrigérateur (1) est fermé contre la circulation de réfrigérant et seulement le réfrigérant dans le réfrigérateur (1) est chauffé, étant fait circuler au travers du refrigérateur (1) via un by-pass (5).
  2. Installation frigorifique ayant un réfrigérant (1) respectivement échangeur de chaleur disposé dans une circulation de réfrigérant et un dispositif pour dégriver le refrigérateur respectivement échangeur de chaleur, dans lequel le refrigérateur est traversé par un réfrigérant comme eau salée,
    caractérisé par des moyens pour fermer le refrigérateur respectivement échangeur de chaleur contre la circulation de réfrigérant et un by-pass (5) contournant le réfrigérant (1) dans lequel une pompe (7) et une installation de chauffage (6) sont disposées.
  3. Installation frigorifique selon la revendication 2,
    le moyen de chauffage étant formé comme échangeur de chaleur.
  4. Installation frigorifique selon la revendication 2,
    le moyen de chauffage étant formé comme un chauff-eau.
  5. Installation frigorifique selon une des revendications 2 à 4,
    un délimiteur de température (11) étant prévu au moyen de chauffage (6).
  6. Installation frigorifique selon une des revendications précédentes,
    dans le by-pass (5) une sonde (16) de température étant disposée dans le retour devant la pompe (7), par laquelle la température du réfrigérant traversant le by-pass peut être constatée pour déterminer la fin du dégrivage.
  7. Installation frigorifique selon une des revendications précédentes, le by-pass (5) étant conduit par une bassine (9) pour eau fondu.
  8. Installation frigorifique selon une des revendications précédentes,
    le by-pass (5) étant connecté détachable via des points de jonction (25, 26) détachables avec la conduite (4) de réfrigérant.
EP97118534A 1996-10-25 1997-10-24 Procédé et dispositif pour dégivrer un refroidisseur d'une installation de réfrigération Expired - Lifetime EP0838644B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19644488 1996-10-25
DE19644488A DE19644488A1 (de) 1996-10-25 1996-10-25 Verfahren und Vorrichtung zum Abtauen eines Kühlers einer Kälteanlage

Publications (3)

Publication Number Publication Date
EP0838644A2 EP0838644A2 (fr) 1998-04-29
EP0838644A3 EP0838644A3 (fr) 2000-06-07
EP0838644B1 true EP0838644B1 (fr) 2004-06-16

Family

ID=7810037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97118534A Expired - Lifetime EP0838644B1 (fr) 1996-10-25 1997-10-24 Procédé et dispositif pour dégivrer un refroidisseur d'une installation de réfrigération

Country Status (2)

Country Link
EP (1) EP0838644B1 (fr)
DE (2) DE19644488A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100431348B1 (ko) * 2002-03-20 2004-05-12 삼성전자주식회사 냉장고
DE10307065B4 (de) * 2003-02-19 2007-10-04 Otto Junker Gmbh Kühlkreislaufvorrichtung und Kühlverfahren
DE202012004795U1 (de) * 2012-05-15 2013-08-20 Stiebel Eltron Gmbh & Co. Kg Wärmepumpenvorrichtung und Verdampfer für eine Wärmepumpenvorrichtung
DE102015008325A1 (de) * 2015-06-26 2016-12-29 Voss Automotive Gmbh Einrichtung und Verfahren zum Enteisen eines Wärmetauschers im Verdampferbetrieb einer Kälteanlage sowie Fahrzeug mit einer solchen Einrichtung
DE102022134719A1 (de) 2022-12-23 2024-07-04 Eberspächer Catem Gmbh & Co. Kg Wärmepumpsystem, Verwendung eines solchen Wärmepumpsystems zur Gebäudetrocknung und Verfahren zur Erwärmung von einem Fluid

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693682A (en) * 1952-06-25 1954-11-09 Winger Milton Refrigerating system with defrosting arrangement
US2954680A (en) * 1957-03-28 1960-10-04 V C Patterson & Associates Inc Automatic defrosting apparatus
US3675441A (en) * 1970-11-19 1972-07-11 Clark Equipment Co Two stage refrigeration plant having a plurality of first stage refrigeration systems
DE3012541A1 (de) * 1980-03-31 1981-10-08 Lahmeyer Ag, 6000 Frankfurt Waermepumpenanlage, insbesondere fuer heizungszwecke
DE3243672A1 (de) * 1982-11-25 1984-05-30 KKW Kulmbacher Klimageräte-Werk GmbH, 8650 Kulmbach Luft-wasser-waermepumpe
DE4321161C2 (de) * 1993-06-25 2001-02-22 Stiebel Eltron Gmbh & Co Kg Wärmepumpenanlage

Also Published As

Publication number Publication date
EP0838644A2 (fr) 1998-04-29
DE19644488A1 (de) 1998-04-30
EP0838644A3 (fr) 2000-06-07
DE59711716D1 (de) 2004-07-22

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