EP3199895B1 - Cooling-freezing apparatus comprising a device which facilitates opening of a door - Google Patents

Cooling-freezing apparatus comprising a device which facilitates opening of a door Download PDF

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Publication number
EP3199895B1
EP3199895B1 EP17152545.4A EP17152545A EP3199895B1 EP 3199895 B1 EP3199895 B1 EP 3199895B1 EP 17152545 A EP17152545 A EP 17152545A EP 3199895 B1 EP3199895 B1 EP 3199895B1
Authority
EP
European Patent Office
Prior art keywords
cooling
freezing apparatus
container
pressure equalising
flange
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.)
Active
Application number
EP17152545.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3199895A1 (en
Inventor
Niko Lesnjak
Valentin Borovnik
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.)
Gorenje gospodinjski aparati dd
Original Assignee
Gorenje gospodinjski aparati dd
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Publication date
Application filed by Gorenje gospodinjski aparati dd filed Critical Gorenje gospodinjski aparati dd
Publication of EP3199895A1 publication Critical patent/EP3199895A1/en
Application granted granted Critical
Publication of EP3199895B1 publication Critical patent/EP3199895B1/en
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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
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification

Definitions

  • the present invention refers to a cooling-freezing apparatus comprising at least one thermally insulated compartment for receiving goods encapsulated with a case that can be closed by a door or a cover, said case comprises circumferential walls and a back wall, and a device which facilitates opening the door of the cooling-freezing apparatus.
  • a cooling system such as a compressor cooling system or an absorption cooling system or similar.
  • the temperature of the goods and the air in said thermally insulated compartment changes due to the periodic operation of the cooling system and/or occasional opening of the door and the compartment, respectively, causing a pressure oscillation in the thermally insulated space and, as a result, air exchange with the surrounding atmosphere.
  • Each opening the door and the cover, respectively, results in a part of the air in the thermally insulated compartment to be replaced by warmer air from the surrounding.
  • a negative pressure is built due to the cooling of said warmer air, said negative pressure sucks warm and moist air from the surrounding into the inside of the cooling-freezing apparatus and, respectively, said compartment.
  • the excessive moisture from the air is deposited on cool surfaces in the form of dew or white frost where it accumulates and creates ice.
  • the pressure equalisation between the surrounding and the thermally insulated compartment may take more time, depending on the tightness of the case and the sealing surfaces between the door and, respectively, the cover and the compartment. Said negative pressure makes difficult or even prevents temporarily to open the door and, respectively, the cover of the compartment.
  • Embodiments comprising a drying agent in the connecting cavity do reduce entering the moisture into the apparatus and, respectively, the compartment substantially, however, replacing or regenerating of such drying agent is rather difficult. Furthermore, no indicator is provided to inform a user of the replacement of the drying agent due to saturation thereof with the moisture. In addition, arrangement in the connecting cavity reduces locally a thermal insulation of the apparatus, or reduces a useful volume thereof.
  • It is the object of the present invention to create a cooling-freezing apparatus comprising a pressure equalising device in which the hot regeneration of the drying agent is enabled in a cost-efficient and simple way, as well as it is allowed an easier identification by a user, that the drying agent should be regenerated.
  • a cooling-freezing apparatus 1 comprises at least one thermally insulated compartment 2 for receiving goods, said compartment 2 being encompassed with a case 3 and is closed by a door 4 or a cover.
  • Said door 4 can be formed as an upright door or as a covering lid, depending on the embodiment of the cooling-freezing apparatus1.
  • the invention is further described as the embodiment of an upright apparatus 1.
  • Said case 3 comprise side walls, a bottom wall and a top wall, and a back wall 5.
  • a condenser 6 know per se is arranged along the back wall 5, at the outer side and in the bottom area thereof.
  • a removable device 7 for equalising pressure in the compartment 2 and, respectively, in the cooling-freezing apparatus 1 is arranged at the outer side of one of the wall of the case 3 or the door 4, and, in the present embodiment, at the outer side of the back wall 5.
  • Said device 7 is preferably arranged in the area directly above the condenser 6 of the cooling-freezing apparatus 1.
  • Said pressure equalising device 7 is connected with the interior of the cooling-freezing apparatus 1 and, respectively, with the interior of the compartment by means of a connecting channel 8 formed in said back wall 5.
  • the connecting channel 8 extends inclined downwardly in the direction from the interior of the compartment 2 toward the surrounding.
  • a drying agent 9 is arranged inside the pressure equalising device 7, in a form of a molecular sieve for instance.
  • Said pressure equalising device 7 is formed as a container 10 comprising a tubular protrusion 11 that is tightly insertable into said connecting channel 8.
  • Said tubular protrusion 11 extends from the container 10 with approximately the same inclination as is the inclination of the connecting channel 8.
  • the latter is formed at the outside of the back wall 5 with a flange 12 configured for the attachment of the pressure equalising device 7.
  • Said device 7 forms with said flange 12 either a positive joint, such as a snap-in, and/or a non-positive joint, such as at least one threaded means.
  • the container 10 is provided in the area of the connection with the tubular protrusion with a flange 13 comprising either the opposite blocking means as said flange 12 of the connecting channel 8, and/or at least one through hole 13a for accommodation of said threaded means. Furthermore, at least one wall an/or a bottom 14 of the container 10 is formed with at least one through hole 15, preferably with a plurality of through holes 15 for the air to flow from the surrounding into the interior of the compartment 2.
  • the total area of the through holes amounts to the value which enables satisfactory air flow and, thus, fast pressure equalisation between the interior of the cooling-freezing apparatus 1 and, respectively, the compartment 2 and the surrounding atmosphere.
  • Said container 10 can be made as a single disposable part that can be removed and disposed after the drying agent 9 has been consumed.
  • An alternative embodiment provides the container 10 formed with a lid 16 which closes the container 10 at the side opposite to the bottom 14.
  • the consumed drying agent 9 can be removed and replaced with a new one.
  • Said drying agent 9 can be in the form of a granulate or a monolithic blank that can be accepted by the container 10.
  • each said through hole 15 is smaller than the size of a granulate and, respectively, of a single grain of the drying agent 9, thus, preventing the particles of the drying agent 9 to fall through the holes 15.
  • Said container 10 is made of a high temperature resistant material, thus, enabling regeneration of the drying agent 9 without opening thereof, in an oven for example.
  • the container 10 is made of a translucent material, which enables fast insight whether the drying agent 9 is already consumed and the regeneration thereof is required.
  • a pigment is added to the drying agent 9 which changes the colour depending on the moisture rate and saturation with moisture, respectively.
  • said connecting channel 8 and said tubular protrusion 11 form a positive joint, thus, preventing the air from the surrounding to enter the cooling-freezing apparatus 1 and, respectively, the compartment 2 anywhere else but through the through holes 15 and the drying agent 9.
  • Said interference fit is additionally supported by said positive joint between the flange 12 of the connecting channel 8 and the flange 13 of the container 10.
  • the flange 12 is formed in the area of the entrance of the tubular protrusion 11 with at least one tooth 17 which mates an appropriately undercut edge 18 of the flange 13.
  • the air flows from the surrounding into the interior of the apparatus and vice versa.
  • the air flows through the drying agent 9 in the container 10 which is arranged at the outside of the apparatus 1, preferably above the condenser 6.
  • the drying agent 9 retains water molecules and dry air continues its way to the inside of the apparatus.
  • said dry air absorbs on its way out water molecules from the drying agent 9 and release them into surrounding.
  • the container 10 with the drying agent 9 is arranged directly above the condenser 6 and, respectively, in the close vicinity thereof, natural heat convection additionally contributes the regeneration of the drying capacity of the absorbent. If extremely high moisture is present in the surrounding atmosphere, the capacity of the drying agent 9 might be too low for a long term efficiency. In such cases the drying agent 9 can be regenerated by drying at the required temperature or by being replaced with a new one.
  • One of additional advantages of the external arrangement of the pressure equalisation device 7 according to the invention is also shown in a fact that it does not decrease the useful volume in the freezer. Additionally, said device 7 can be incorporated into every old cooling-freezing apparatus where such a device was not provided initially. Therewith, the accumulation rate and the quantity of the white frost on the evaporation surfaces is lowered, and opening the door/cover is substantially easier.
  • a hole is made through the insulation at the appropriate spot, a connecting channel 8 being placed in said hole.
  • a flange 13 of the container 10 is snapped-in by means of the edge 18 to the flange 12 of the connecting channel 8, and if necessary additionally fixed by screws.
  • the device 7 for equalising pressure in the cooling-freezing apparatus 1 is arranged on or in any other wall of the case 3 or in the door 4, and not only on the back wall 5.
  • said device 7 can be arranged inside the cooling-freezing apparatus 1, which is an example not being part of the present invention. It is provided for, according to one example not being part of the present invention, that the device 7 is formed in a handle of the cooling-freezing apparatus 1, which substantially facilitates the user to access the pressure equalisation device 7 and to manipulate therewith.

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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP17152545.4A 2016-02-01 2017-01-23 Cooling-freezing apparatus comprising a device which facilitates opening of a door Active EP3199895B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201600030A SI25144A (sl) 2016-02-01 2016-02-01 Hladilno-zamrzovalni aparat z napravo, ki olajša odpiranje vrat

Publications (2)

Publication Number Publication Date
EP3199895A1 EP3199895A1 (en) 2017-08-02
EP3199895B1 true EP3199895B1 (en) 2020-05-27

Family

ID=57960241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17152545.4A Active EP3199895B1 (en) 2016-02-01 2017-01-23 Cooling-freezing apparatus comprising a device which facilitates opening of a door

Country Status (2)

Country Link
EP (1) EP3199895B1 (sl)
SI (1) SI25144A (sl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111306874A (zh) * 2018-12-11 2020-06-19 青岛海尔智能技术研发有限公司 一种气压平衡装置和冷柜
CN110906634A (zh) * 2019-12-08 2020-03-24 江苏星星家电科技有限公司 一种冰箱微霜气压平衡装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201828101U (zh) * 2010-09-30 2011-05-11 青岛营上电器有限公司 冷柜门体气压平衡阀
CN204165314U (zh) * 2014-10-10 2015-02-18 澳柯玛股份有限公司 一种冷柜用排水管组件
CN204963374U (zh) * 2015-08-18 2016-01-13 合肥华凌股份有限公司 透气减霜装置、门体及其冷柜

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
SI25144A (sl) 2017-08-31
EP3199895A1 (en) 2017-08-02

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