EP0065088A2 - Temperature-controlled refrigeration and deepfreeze area with a volume of 50 000m3 and above with a device for equalising pressure differences - Google Patents

Temperature-controlled refrigeration and deepfreeze area with a volume of 50 000m3 and above with a device for equalising pressure differences Download PDF

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Publication number
EP0065088A2
EP0065088A2 EP82102165A EP82102165A EP0065088A2 EP 0065088 A2 EP0065088 A2 EP 0065088A2 EP 82102165 A EP82102165 A EP 82102165A EP 82102165 A EP82102165 A EP 82102165A EP 0065088 A2 EP0065088 A2 EP 0065088A2
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EP
European Patent Office
Prior art keywords
door
opening
cooling
closed
deep
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.)
Granted
Application number
EP82102165A
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German (de)
French (fr)
Other versions
EP0065088B1 (en
EP0065088A3 (en
Inventor
Kuno Leyendecker
Alfred Moreth
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.)
Saint Gobain Isover G+H AG
G&H Montage GmbH
Original Assignee
G&H Montage GmbH
Gruenzweig und Hartmann AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6131975&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0065088(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by G&H Montage GmbH, Gruenzweig und Hartmann AG filed Critical G&H Montage GmbH
Priority to AT82102165T priority Critical patent/ATE16314T1/en
Publication of EP0065088A2 publication Critical patent/EP0065088A2/en
Publication of EP0065088A3 publication Critical patent/EP0065088A3/en
Application granted granted Critical
Publication of EP0065088B1 publication Critical patent/EP0065088B1/en
Expired 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/047—Pressure equalising 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
    • 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 device for compensating for the pressure differences occurring during the defrosting of the evaporators of the cooling unit at predetermined time intervals between a temperature-controlled cooling or freezing room and the atmosphere surrounding the boundary walls of such a cooling or freezing room.
  • Such a device is intended to prevent excessive pressure or vacuum being created in the rooms where the temperature is comparatively low.
  • such devices are required in cooling chambers or pressure chambers in which the evaporators of the cooling units have to be defrosted at predetermined time intervals. The temperature increase required for defrosting leads to an increase in pressure.
  • flaps are not suitable for refrigerated or deep-freeze rooms with a large volume, for example 70,000 to 80,000 m 3 .
  • a large volume for example 70,000 to 80,000 m 3 .
  • spring-loaded closure elements do not always close tightly, so that there is some air exchange even during normal operation, ie not only during the defrosting process.
  • the invention seeks to remedy the problem and proposes a solution to the problem, even in refrigerated or deep-freeze rooms with a large volume of up to 70,000 to 80,000 m 3 , to provide a device with which pressure equalization is perfectly possible.
  • the device according to the invention is characterized by a free opening provided in the boundary wall of the refrigerator or freezer, the dimensions of which are adapted to the volume of the refrigerator or freezer and which is closed by a pivotable, thermally insulated flap-like door and is provided with an electromechanical drive which is provided with the control of the defrosting process is coupled such that the flap opens automatically at the end of the defrosting process and closes again automatically after a predetermined time.
  • the device Through the device according to the invention, a completely free connection between the refrigerator or freezer compartment and the atmosphere surrounding it is established in the critical periods, ie in the time before the evaporator fans start again after defrosting, and thus any pressure fluctuation inside the refrigerator - or freezer absolutely prevented, so that stresses on the walls and especially the Ceiling construction can no longer occur. Due to the presence of an electromechanical opening and closing drive, the dimensions of the flap-like door can be chosen so optimally that it is perfectly suitable for the desired purposes even with comparatively large volumes.
  • a heatable frame is preferably inserted into it.
  • a strip or pendulum curtain can be provided in a further embodiment of the invention before the opening.
  • FIG. 1 closes a refrigerator or deep-freeze room 3, the boundary wall 1 of which has an opening 2, the dimensions of which are indicated schematically by the dashed line in FIG. 1 and fully in the other figures.
  • a frame is seated which consists of an inner part 4 set thermal insulation 5 and an outer part 6, which can also be seen in Fig. 1.
  • a circumferential heater 11 is also provided on the frame part 6, which prevents the flap-like door 9 from freezing to the frame part 11.
  • a rod 13 is pivotably mounted on the frame part 6 via a joint 12, which rod is connected via a joint 14 to a crank arm 15 which can be driven by a motor 16 sitting on the door 9.
  • a crank arm 15 which can be driven by a motor 16 sitting on the door 9.

Abstract

1. A temperature-controlled cooling or deep-freezing chamber having a volume of 50,000 m**3 or more, in which the evaporators, provided with ventilators, of the cooling aggregate are defrosted at predetermined time intervals, the ventilators being switched off, characterized by a free opening (2) provided in the limiting wall (1) of the cooling or deep-freezing chamber (3), said opening being closed by a swinging, thermally insulated, flap-like door (9) and provided with an electromechanical drive means (12 to 16) which is coupled with the control means of the defrosting process in such a way that the door (9) automatically opens at the end of the defrosting process before the ventilators of the evaporators start running again, and automatically closes again after a predetermined time period.

Description

Die Erfindung betrifft eine Vorrichtung zum Ausgleich von bei dem in vorgegebenen Zeitabständen erfolgenden Abtauen der Verdampfer des Kühlaggregates auftretenden Druckunterschieden zwischen einem temperaturgesteuerten Kühl- oder Tiefkühlraum und der die Begrenzungswandungen eines solchen Kühl- oder Tiefkühlraumes umgebenden Atmosphäre.The invention relates to a device for compensating for the pressure differences occurring during the defrosting of the evaporators of the cooling unit at predetermined time intervals between a temperature-controlled cooling or freezing room and the atmosphere surrounding the boundary walls of such a cooling or freezing room.

Durch eine solche Vorrichtung soll vermieden werden, daß in den Räumen, in denen eine vergleichsweise niedrige Temperatur herrscht, zu starker Ober- oder Unterdruck entsteht. Insbesondere werden solche Vorrichtungen bei Kühlkammern oder Druckkammern benötigt, bei denen die Verdampfer der Kühlaggregate in vorgegebenen Zeitabständen abgetaut werden müssen. Die zum Abtauen erforderliche Temperaturerhöhung führt zu einer Drucksteigerung.Such a device is intended to prevent excessive pressure or vacuum being created in the rooms where the temperature is comparatively low. In particular, such devices are required in cooling chambers or pressure chambers in which the evaporators of the cooling units have to be defrosted at predetermined time intervals. The temperature increase required for defrosting leads to an increase in pressure.

Für Kühlkammern oder Druckkammern, bei denen eine solche Drucksteigerung dazu führen kann, daß sich die Tür zur Kammer selbständig öffnet, ist es aus der DE-PS 22 56 920 bereits bekannt, in eine öffnung der Kammerwandung einen an der Wandung zu befestigenden Rahmen einzusetzen, dem ein weiteres, aus einem nachgiebig oder verschiebbar in dem Rahmen angeordnetes, einen Sitz bildendes Rahmenteil sowie ein Verschlußteil zugeordnet sind, welches bezüglich des Rahmenteils beweglich angeordnet ist und entweder mit dem Sitz, dem durch das Rahmenteil des benachbarten Teiles begrenzten Sitz oder dem durch den Rahmen begrenzten Sitz zusammenwirkt.For cooling chambers or pressure chambers in which such an increase in pressure can lead to the door to the chamber opening automatically, it is already known from DE-PS 22 56 920 to insert a frame to be fastened to the wall in an opening in the chamber wall, which are associated with another, from a resiliently or displaceably arranged in the frame, a seat-forming frame part and a closure part which is movably arranged with respect to the frame part and either with the seat, the seat delimited by the frame part of the adjacent part or by the seat Frame limited seat interacts.

Es handelt sich hier um eine gegen die Wirkung einer Feder zugehaltene Klappe, die sich bei einem entsprechenden Druckanstieg im Inneren der Kammer öffnen soll. Ein unzulässig hoher Luftaustausch soll durch Hintereinanderschaltung mehrerer solcher Verschlußteile verhindert werden, wodurch gewissermaßen eine Labyrinthdichtung im Bereich der Ausgleichsvorrichtung entsteht.It is a flap that is locked against the action of a spring and that should open when the pressure inside the chamber rises accordingly. An inadmissibly high air exchange is to be prevented by connecting several such closure parts in series, as a result of which a labyrinth seal is formed in the area of the compensating device.

Für Kühl- oder Tiefkühlräume großen Rauminhalts, von beispielsweise 70.000 bis 80.000 m3, eignen sich solche Klappen jedoch nicht. Dort ist insbesondere das Problem akut, daß durch die Druckschwankungen die eingehängten wärmegedämmten Decken und deren Aufhängung dauernd auf Biegung und Zug wechselbeansprucht werden, wodurch die entsprechenden Befestigungselemente durch Materialermüdungserscheinungen zerstört werden und es nicht nur zur überlastung, sondern sogar zum Einsturz der Konstruktion kommen kann. Im übrigen schließen federbelastete Verschlußelemente auch nicht immer dicht, so daß es auch im normalen Betrieb, d.h. nicht nur während des Abtauvorganges, zu einem gewissen Luftaustausch kommt.However, such flaps are not suitable for refrigerated or deep-freeze rooms with a large volume, for example 70,000 to 80,000 m 3 . There is particularly acute the problem that by Pressure fluctuations the suspended heat-insulated ceilings and their suspension are constantly subjected to bending and tension, whereby the corresponding fasteners are destroyed by material fatigue and not only overloading, but even collapse of the structure. Moreover, spring-loaded closure elements do not always close tightly, so that there is some air exchange even during normal operation, ie not only during the defrosting process.

Hier will die Erfindung Abhilfe schaffen und schlägt eine Lösung des Problems, auch bei Kühl- oder Tiefkühlräumen großen Rauminhalts von bis zu 70.000 bis 80.000 m3, eine Vorrichtung zu schaffen, mit der ein Druckausgleich einwandfrei möglich ist, vor.Here, the invention seeks to remedy the problem and proposes a solution to the problem, even in refrigerated or deep-freeze rooms with a large volume of up to 70,000 to 80,000 m 3 , to provide a device with which pressure equalization is perfectly possible.

Die erfindungsgemäße Vorrichtung ist gekennzeichnet durch eine in der Begrenzungswand des Kühl- oder Tiefkühlraumes vorgesehene freie öffnung, deren Abmessungen dem Rauminhalt des Kühl- oder Tiefkühlraumes angepaßt ist und die durch eine schwenkbare, wärmegedämmte klappenartige Türe verschlossen und mit einem elektromechanischen Antrieb versehen ist, der mit der Steuerung des Abtauvorganges derart gekoppelt ist, daß sich die Klappe am Ende des Abtauvorganges automatisch öffnet und nach vorgegebener Zeit wieder automatisch schließt.The device according to the invention is characterized by a free opening provided in the boundary wall of the refrigerator or freezer, the dimensions of which are adapted to the volume of the refrigerator or freezer and which is closed by a pivotable, thermally insulated flap-like door and is provided with an electromechanical drive which is provided with the control of the defrosting process is coupled such that the flap opens automatically at the end of the defrosting process and closes again automatically after a predetermined time.

Durch die erfindungsgemäße Vorrichtung wird in den kritischen Zeitabschnitten, d.h. in der Zeit, bevor die Ventilatoren der Verdampfer nach dem Abtauen wieder anlaufen, eine völlig freie Verbindung zwischen Kühl- bzw. Tiefkühlraum und der ihn umgebenden Atmosphäre hergestellt und damit jede Druckschwankung im Inneren des Kühl- oder Tiefkühlraumes absolut verhindert, so daß Beanspruchungen der Wandungen und insbesondere der Deckenkonstruktion nicht mehr auftreten können. Durch das Vorhandensein eines elektromechanischen Öffnungs- und Schließantriebes, können die Abmessungen der klappenartigen Türe so optimal gewählt werden, daß sie sich für die gewünschten Zwecke auch bei vergleichsweise großen Rauminhalten tadellos eignet.Through the device according to the invention, a completely free connection between the refrigerator or freezer compartment and the atmosphere surrounding it is established in the critical periods, ie in the time before the evaporator fans start again after defrosting, and thus any pressure fluctuation inside the refrigerator - or freezer absolutely prevented, so that stresses on the walls and especially the Ceiling construction can no longer occur. Due to the presence of an electromechanical opening and closing drive, the dimensions of the flap-like door can be chosen so optimally that it is perfectly suitable for the desired purposes even with comparatively large volumes.

Um ein Anfrieren der klappenartigen Türe an der Wandungs- öffnung zu verhindern, ist in diese vorzugsweise ein beheizbarer Rahmen eingesetzt.In order to prevent the flap-like door from freezing to the wall opening, a heatable frame is preferably inserted into it.

Um einen unzulässigen Warmlufteinfall oder Kaltluftaustritt vor bzw. nach erfolgtem Druckausgleich zu vermeiden, kann in weiterer Ausbildung der Erfindung vor der öffnung ein Streifen- oder Pendelvorhang vorgesehen sein.In order to avoid an inadmissible warm air inlet or cold air outlet before or after pressure equalization, a strip or pendulum curtain can be provided in a further embodiment of the invention before the opening.

Die Zeichnung zeigt in

  • Fig. 1 eine Draufsicht auf die Wandung eines Kühl- oder Tiefkühlraumes mit der eingesetzten klappenartigen Druckausgleichstür;
  • Fig. 2 einen Schnitt längs der Linie II-II der Fig. 1 und in
  • Fig. 3 einen Schnitt längs der Linie III-III der Fig. 1.
The drawing shows in
  • Figure 1 is a plan view of the wall of a refrigerator or freezer with the flap-like pressure compensation door used.
  • Fig. 2 shows a section along the line II-II of Fig. 1 and in
  • 3 shows a section along the line III-III of FIG. 1st

Die in Fig. 1 wiedergegebene Vorrichtung verschließt einen Kühl-oder Tiefkühlraum 3, dessen Begrenzungswand 1 eine öffnung 2 aufweist, deren Abmessungen schematisch durch die gestrichelte Linie in Fig. 1 und voll in den anderen Figuren angedeutet ist. In dieser Öffnung sitzt, wie man insbesondere aus den Fig. 2 und 3 erkennt, ein Rahmen, der aus einem inneren Teil 4 mit eingesetzter Wärmedämmung 5 und einem äußeren Teil 6 besteht, der auch in Fig. 1 erkennbar ist. Auf dem Rahmenteil 6 sitzen zwei Scharnierteile 7 zur Aufnahme eines Gegenscharnieres 8 an einer klappenartigen, wärmegedämmten Tür 9, die mittels eines Magnetverschlusses 10 zugehalten wird. Auf dem Rahmenteil 6 ist ferner eine umlaufende Heizung 11 vorgesehen, die verhindert, daß die klappenartige Türe 9 auf dem Rahmenteil 11 festfrieren kann. Am Rahmenteil 6 ist über ein Gelenk 12 eine Stange 13 schwenkbar montiert, die über ein Gelenk 14 mit einem Kurbelarm 15 in Verbindung steht, der von einem auf der Tür 9 sitzenden Motor 16 antreibbar ist. Aus Fig. 2 erkennt man, daß es mit Hilfe des Kurbeltriebes durch Antrieb von Seiten des Motors 16 möglich ist, zu einem vorgewählten Zeitpunkt die Türe 9 in den gestrichelt gezeichneten öffnungszustand 9' zu bewegen, so daß die ganze freie öffnung 2 für den Druckausgleich zwischen Außenatmosphäre und Innerem des Kühl-oder Tiefkühlraumes 3 zur Verfügung steht. Vorsorglich können, wie es in Fig. 2 bei 17 angedeutet ist, entsprechende Abschirmvorrichtungen, wie ein Streifen- oder Pendelvorhang vorgesehen sein, der einen zu hohen Warmlufteintritt bzw. Kaltluftaustritt nach erfolgtem Druckausgleich verhindert.The device shown in FIG. 1 closes a refrigerator or deep-freeze room 3, the boundary wall 1 of which has an opening 2, the dimensions of which are indicated schematically by the dashed line in FIG. 1 and fully in the other figures. In this opening, as can be seen in particular from FIGS. 2 and 3, a frame is seated which consists of an inner part 4 set thermal insulation 5 and an outer part 6, which can also be seen in Fig. 1. On the frame part 6 there are two hinge parts 7 for receiving a counter hinge 8 on a flap-like, thermally insulated door 9, which is locked by means of a magnetic lock 10. A circumferential heater 11 is also provided on the frame part 6, which prevents the flap-like door 9 from freezing to the frame part 11. A rod 13 is pivotably mounted on the frame part 6 via a joint 12, which rod is connected via a joint 14 to a crank arm 15 which can be driven by a motor 16 sitting on the door 9. From Fig. 2 it can be seen that it is possible with the help of the crank mechanism by drive from the side of the motor 16 to move the door 9 at a preselected time into the opening state 9 'shown in dashed lines, so that the entire free opening 2 for pressure equalization between the outside atmosphere and the interior of the refrigerator or freezer compartment 3 is available. As a precautionary measure, as indicated in FIG. 2 at 17, corresponding shielding devices, such as a strip or pendulum curtain, can be provided which prevent the warm air from entering or the cold air from escaping after the pressure has been equalized.

Claims (4)

1. Vorrichtung zum Ausgleich von bei dem in vorgegebenen Zeitabständen erfolgenden Abtauen der Verdampfer des Kühlaggregates auftretenden Druckunterschieden zwischen einem temperaturgesteuerten Kühl- oder Tiefkühlraum großen Rauminhalts von 50000 m3 und mehr und der die Begrenzungswandungen eines solchen Kühl- oder Tiefkühlraumes umgebenden Atmosphäre, gekennzeichnet durch eine in der Begrenzungswand (1) des Kühl- oder Tiefkühlraumes (3) vorgesehene freie öffnung (2), die durch eine schwenkbare, wärmegedämmte klappenartige Tür (9) verschlossen und mit einem elektromechanischen Antrieb (16) versehen ist, der mit der Steuerung des Abtauvorganges derart gekoppelt ist, daß sich die Tür (9) am Ende des Abtauvorganges automatisch öffnet und nach vorgegebener Zeit wieder automatisch schließt.1.Device for compensating for pressure differences occurring during the defrosting of the evaporators of the cooling unit at predetermined time intervals between a temperature-controlled cooling or deep-freezing room with a large volume of 50,000 m 3 and more and the atmosphere surrounding the boundary walls of such a cooling or deep-freezing room, characterized by an atmosphere in the boundary wall (1) of the refrigerator or freezer (3) there is a free opening (2) which is closed by a pivotable, thermally insulated flap-like door (9) and is provided with an electromechanical drive (16) which controls the defrosting process is coupled such that the door (9) opens automatically at the end of the defrosting process and closes again automatically after a predetermined time. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet , daß die Öffnung (2) von einem beheizbaren Rahmen (6) eingefaßt ist.2. Device according to claim 1, characterized in that the opening (2) is surrounded by a heatable frame (6). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die Tür (9) im geschlossenen Zustand durch einen elektromagnetischen, steuerbaren Riegel (11) verschlossen ist.3. Apparatus according to claim 1 or 2, characterized in that the door (9) is closed in the closed state by an electromagnetic, controllable bolt (11). 4. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß vor der von der Tür (9) verschlossenen Öffnung (2) ein Streifen- oder Pendelvorhang (17) vorgesehen ist.4. Device according to one or more of the preceding claims, characterized in that a strip or pendulum curtain (17) is provided in front of the opening (2) closed by the door (9).
EP82102165A 1981-05-11 1982-03-17 Temperature-controlled refrigeration and deepfreeze area with a volume of 50 000m3 and above with a device for equalising pressure differences Expired EP0065088B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102165T ATE16314T1 (en) 1981-05-11 1982-03-17 TEMPERATURE CONTROLLED REFRIGERATOR OR FREEZER ROOM OF 50.000M3 AND MORE WITH PRESSURE DIFFERENCE COMPENSATION DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813118600 DE3118600A1 (en) 1981-05-11 1981-05-11 DEVICE FOR COMPENSATING PRESSURE DIFFERENCES BETWEEN A TEMPERATURE-CONTROLLED ROOM AND THE SURROUNDING ATMOSPHERE
DE3118600 1981-05-11

Publications (3)

Publication Number Publication Date
EP0065088A2 true EP0065088A2 (en) 1982-11-24
EP0065088A3 EP0065088A3 (en) 1983-05-04
EP0065088B1 EP0065088B1 (en) 1985-10-30

Family

ID=6131975

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Application Number Title Priority Date Filing Date
EP82102165A Expired EP0065088B1 (en) 1981-05-11 1982-03-17 Temperature-controlled refrigeration and deepfreeze area with a volume of 50 000m3 and above with a device for equalising pressure differences

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Country Link
EP (1) EP0065088B1 (en)
AT (1) ATE16314T1 (en)
DE (2) DE3118600A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2530327A (en) * 2014-09-22 2016-03-23 42 Technology Ltd Heat transfer apparatus
CN108895745A (en) * 2018-07-17 2018-11-27 杨浩 A kind of refrigerator-freezer being easy to open

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151940A1 (en) * 1981-12-30 1983-07-07 G + H Montage Gmbh, 6700 Ludwigshafen Device for compensating pressure differences between a temperature-controlled room and the surrounding atmosphere
DE10061999C1 (en) * 2000-12-13 2002-10-24 Guentner Gmbh Hans Device for easier defrosting of refrigeration equipment, especially air coolers
DE20021076U1 (en) * 2000-12-13 2001-03-08 Guentner Gmbh Hans Device for storing a defrost flap for a refrigeration apparatus, in particular for an air cooler
DE102012005781A1 (en) * 2012-02-15 2013-08-22 Liebherr-Hausgeräte Lienz Gmbh Cooling and/or freezing apparatus has drive unit that is connected with valve portion to move valve portion to open state or closed state
CN110736277A (en) * 2019-10-21 2020-01-31 无锡职业技术学院 Self-adaptive defrosting control method of air-cooled heat pump system

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DE134286C (en) *
US2139991A (en) * 1937-03-29 1938-12-13 Wingard Gunnar Refrigerator breather tube
US2170014A (en) * 1937-11-23 1939-08-22 Maseco Corp Door operating device
FR893651A (en) * 1943-01-13 1944-08-11 Door closer device
US2584480A (en) * 1950-12-09 1952-02-05 Denham Mfg Company Magnetic latch for doors
US3680329A (en) * 1971-02-18 1972-08-01 Emhart Corp Pressure equalizing valve
FR2222618A1 (en) * 1973-03-22 1974-10-18 Tripier Jean Claude Controlled humidity cooler for bakers dough - draws in external air when temperature rises for fermentation
US3952542A (en) * 1974-11-22 1976-04-27 Kason Hardware Corporation Ventilator
US3971581A (en) * 1974-06-17 1976-07-27 Montgomery Tom C Variable magnetic lock
FR2334035A1 (en) * 1975-12-03 1977-07-01 Taisei Kosan Kk AIR PRESSURE CONTROL UNIT FOR A HOT OR COLD STORAGE CHAMBER
US4257445A (en) * 1978-10-26 1981-03-24 Buildex Incorporated Shielded vent port

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE134286C (en) *
US2139991A (en) * 1937-03-29 1938-12-13 Wingard Gunnar Refrigerator breather tube
US2170014A (en) * 1937-11-23 1939-08-22 Maseco Corp Door operating device
FR893651A (en) * 1943-01-13 1944-08-11 Door closer device
US2584480A (en) * 1950-12-09 1952-02-05 Denham Mfg Company Magnetic latch for doors
US3680329A (en) * 1971-02-18 1972-08-01 Emhart Corp Pressure equalizing valve
FR2222618A1 (en) * 1973-03-22 1974-10-18 Tripier Jean Claude Controlled humidity cooler for bakers dough - draws in external air when temperature rises for fermentation
US3971581A (en) * 1974-06-17 1976-07-27 Montgomery Tom C Variable magnetic lock
US3952542A (en) * 1974-11-22 1976-04-27 Kason Hardware Corporation Ventilator
FR2334035A1 (en) * 1975-12-03 1977-07-01 Taisei Kosan Kk AIR PRESSURE CONTROL UNIT FOR A HOT OR COLD STORAGE CHAMBER
US4257445A (en) * 1978-10-26 1981-03-24 Buildex Incorporated Shielded vent port

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2530327A (en) * 2014-09-22 2016-03-23 42 Technology Ltd Heat transfer apparatus
CN108895745A (en) * 2018-07-17 2018-11-27 杨浩 A kind of refrigerator-freezer being easy to open

Also Published As

Publication number Publication date
DE3118600A1 (en) 1982-11-25
EP0065088B1 (en) 1985-10-30
ATE16314T1 (en) 1985-11-15
DE3267096D1 (en) 1985-12-05
EP0065088A3 (en) 1983-05-04

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