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
  • F25D23/08—Parts formed wholly or mainly of plastics materials
  • F25D23/082—Strips
  • F25D23/087—Sealing strips

Definitions

• the invention relates to a seal for a door of a refrigerator or freezer or the like, having a sealing head and a sealing foot, which is connected via walls and is fixed in an undercut receiving groove in the door and is laterally offset from the sealing head and has an insertion wedge and which has hook-like, is equipped with its free ends facing away from the insertion wedge holding lugs, which are supported on the walls of the receiving groove.
• the holding groove is not only equipped with a relatively strongly tapered entry opening which produces the undercut, but at the same time the sealing foot is also provided with holding lugs which are supported on the walls of the retaining groove when the sealing foot is installed.
• the sealing foot on the one hand When designing the retaining groove on the one hand, but also the sealing foot on the other hand, care must be taken that the sealing foot on the one hand can be inserted into the holding groove, in particular in its strongly tapered access opening, with relatively little effort, but at the same time the sealing foot within the receiving groove experiences sufficient hold to the opening force occurring during the opening process of the refrigerator or freezer door, which in the worst case arises from the tearing force of the magnetic strips arranged on the sealing head of the door seal from the housing of a cooling or freezer and possibly resulting from the negative pressure that forms in the refrigerator and acts on the door to be able to counteract sufficiently.
• the invention has for its object to avoid the disadvantages of the prior art in a seal according to the preamble of claim 1 with simple constructive measures and to propose a fastening for its sealing foot in the holding groove of a refrigerator or freezer door, which the most energy-saving fastening the Sealing foot, but at the same time also ensures a sufficient holding force of the sealing foot in the receiving groove.
• the sealing foot has at least three hook-like holding lugs, at least largely in a relaxed position in the holding groove, of which two holding lugs of at least substantially the same length are arranged opposite one another near the insertion wedge and together with this an arrowhead-like section form, while the free end facing the sealing head is designed stub-like and has an obtuse intermediate angle to a vertical than the other two holding lugs and that the holding lug upstream of the stub-like holding lug is able to pivot into an intermediate area provided between these two holding lugs.
• this can also be pressed into a holding groove provided on the inner lining of a refrigerator or freezer door without a lubricant with a justifiable effort in large-scale production, not only because of its arrowhead-like section, but also because the two holding lugs arranged one behind the other can be pressed in front when entering pressing process is able to nestle completely against the body of the sealing foot as a result of the intermediate area saved between the two retaining lugs, and thus the width of the sealing foot is kept as small as possible when it is pressed into the retaining groove.
• the stub-like retaining lug offers a particularly high retention force on the side of the sealing head due to its shortness, which prevents the sealing base from loading when the load is on. Since the stub-like retaining lug on the sealing foot is only arranged on one side, its rigid design in no way hinders the assembly process.
• the stub-like holding lug and the holding lug in front of it have a cutting-like edge with which they rest on the wall of the holding groove. This ensures in a particularly simple manner that no moisture and air can enter the cooling space of a refrigerator or freezer via the receiving groove with the sealing foot mounted therewith.
• the stub-like holding lug has an intermediate angle to the vertical, which is essentially accounts for the double intermediate angle of the stub-like retaining nose.
• the intermediate angle of the stub-like holding lug to the vertical is between 50 ° and 70 °, but preferably 62 ° is, while the intermediate angle of the holding lug upstream of the stub-like holding lug to the vertical is between 25 ° and 40 °, but is preferably 34 °.
• the sealing foot of which is fixed in an undercut holding groove which bulges on one side in the direction of the sealing head, it is provided that the stub-like holding lug and the holding lug in front of it are assigned to the bulging side of the holding groove in the fastening state of the seal.
• the holding lug upstream of the stub-like holding lug and the holding lug opposite it are made reinforced on the base of the lug.
• the stiffening of the retaining lugs on their nose base ensures that the retaining lugs are able to counter the opening forces occurring during the opening process of the refrigerator or freezer door with a sufficient moment of resistance and thus provide the desired holding force for the seal.
• the reinforcement prevents bending of the retaining lug as a result of the load introduced on the door seal when the refrigerator door is opened.
• the stiffening increases the restoring forces for the retaining lugs in order to pivot them back into their correct position, ensuring the maximum retaining force, after the sealing foot has been installed in the retaining groove.
• the holding lug opposite the preceding holding lug has an intermediate angle to the vertical of 50 ° to 70 ° has, but preferably has an intermediate angle of 57 °.
• the holding lug opposite the preceding holding lug has a rounded end at its free end, with which it bears against the wall of the holding groove.
• the retaining lugs rest against the wall of the retaining groove with a low pretensioning force.
• Such a measure always ensures that air or moisture can enter the cooling chamber of a refrigerator or freezer, which is closed by the refrigerator or freezer door, from the outside atmosphere via the sealing foot mounted in the retaining groove.
• the single figure shows a section of a heat-insulating housing of a cooling device in the region of its cooling chamber opening edge which serves to support a magnetic seal, in horizontal section.
• a cooling device 10 is shown in a simplified schematic representation in the area of its cooling chamber opening edge.
• the cooling device 10 has a heat-insulating housing 11 with a heat insulation layer 12 which extends around the opening edge of an access opening to a cooling space (not shown) under a steel sheet serving as a magnetic anchor. cover is arranged.
• a door 14 which is rotatably mounted on door bearings, not shown, is attached to the heat-insulating housing 11 and has an outer cladding 15 made of sheet steel, a heat insulation layer 16 and an inner cladding 17 produced by non-cutting shaping of a plastic board.
• the plastic inner lining 17 is equipped in the edge region of the door 14 with a circumferentially arranged holding groove 18 which has a narrowed insertion opening 19 and a receiving region 20 arranged downstream thereof, which is designed to form an undercut with respect to the insertion opening 19, the extension being asymmetrical by means of a Edge of the door 14 facing bulge is executed.
• the undercut holding groove 18 serves to fasten a bellows-like magnetic seal 21 which, when the door 14 is closed, rests on the opening edge of the housing 11 surrounding the access opening (not shown) to a cooling space.
• the magnetic seal 21 is provided with a sealing foot 22, on the free end of which there is an insertion wedge 23, two holding lugs 24 and 25 opposite one another are provided in an extension of the wedge flanks thereof to form an arrowhead-like section which form barb-like projections on the sealing foot 22.
• the two retaining lugs 24 and 25 have essentially the same length, the retaining lug 25 facing the more bulging portion of the receiving region 20 having an edge 26 on which the retaining lug 25 bears against the more bulging wall of the receiving region 20.
• the retaining lug 25 includes an intermediate angle ⁇ of 34 ° to a vertical V, which has proven to be favorable based on test series, while the retaining lug 24 includes an intermediate angle ⁇ determined from the series of tests with 57 °.
• Both retaining lugs 24 and 25, which are provided within the receiving area 20 in a completely relaxed arrangement, are reinforced on their base of the nose to improve their inherent rigidity and thus their holding force.
• a further hook-like retaining lug 27 is provided on the side of the bulging portion of the receiving area 20, which is stub-like and which includes an intermediate angle ⁇ of 62 °, which is favorable from test series, from the test series.
• the stub-like holding lug 27 is shortened with respect to the two holding lugs 24 and 25 and has at its free end a cutting edge 28 with which the holding lug 27 bears against the wall of the holding groove 20, in the transition area from the insertion opening 19 to the receiving area 20 .
• the distance s the stub-like holding lug 27 above the lug base of the holding lug 25 is determined in such a way that the pivotable part of the holding lug 25 swivels into the insertion opening 19 below the stub-like holding lug 27 during the insertion process of the insertion wedge 23 and thus swings out onto the outside of the sealing foot wall 22 to minimize the Seal foot width can nestle.
• the sealing foot 22 is elastically connected via bellows-like walls 29 and 30 to a sealing head 31 offset laterally by the dimension x, which has a tubular receptacle 32 for introducing permanent magnetic strips 33, which in the closed state of the door 14 on the sheet steel cover serving as a magnetic anchor 13 stick magnetically.

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• 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)
• Refrigerator Housings (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (11)

Cited By (2)

Families Citing this family (3)

Citations (7)

• 1998
  • 1998-09-04 DE DE29815927U patent/DE29815927U1/de not_active Expired - Lifetime
• 1999
  • 1999-08-25 TR TR2001/00468T patent/TR200100468T2/xx unknown
  • 1999-08-25 DE DE59907653T patent/DE59907653D1/de not_active Expired - Lifetime
  • 1999-08-25 ES ES99944513T patent/ES2211159T3/es not_active Expired - Lifetime
  • 1999-08-25 AT AT99944513T patent/ATE253715T1/de not_active IP Right Cessation
  • 1999-08-25 BR BR9913633-3A patent/BR9913633A/pt not_active IP Right Cessation
  • 1999-08-25 DK DK99944513T patent/DK1110045T3/da active
  • 1999-08-25 CN CNB998103039A patent/CN1158510C/zh not_active Expired - Fee Related
  • 1999-08-25 WO PCT/EP1999/006242 patent/WO2000014466A1/de active IP Right Grant
  • 1999-08-25 PL PL346398A patent/PL192591B1/pl not_active IP Right Cessation
  • 1999-08-25 EP EP99944513A patent/EP1110045B1/de not_active Expired - Lifetime
  • 1999-08-26 IT IT1999MI000525U patent/ITMI990525U1/it unknown
  • 1999-08-26 IT IT1999MI001836A patent/ITMI991836A1/it unknown

Patent Citations (7)

Non-Patent Citations (2)

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