EP0698771A1 - Congélateur - Google Patents

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Publication number
EP0698771A1
EP0698771A1 EP95104853A EP95104853A EP0698771A1 EP 0698771 A1 EP0698771 A1 EP 0698771A1 EP 95104853 A EP95104853 A EP 95104853A EP 95104853 A EP95104853 A EP 95104853A EP 0698771 A1 EP0698771 A1 EP 0698771A1
Authority
EP
European Patent Office
Prior art keywords
plate
freezer
tube
evaporator
freezer according
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
EP95104853A
Other languages
German (de)
English (en)
Other versions
EP0698771B1 (fr
Inventor
Heribert Dr. Ballhaus
Franz Blassmann
Hubertus Böhm
Volker Friedmann
Wilfried King
Hubert Pretzel
Roland Reisch
Matthias Wiest
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.)
Liebherr Hausgeraete Ochsenhausen GmbH
Liebherr Hausgeraete GmbH
Original Assignee
Liebherr Hausgeraete Ochsenhausen GmbH
Liebherr Hausgeraete 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 Liebherr Hausgeraete Ochsenhausen GmbH, Liebherr Hausgeraete GmbH filed Critical Liebherr Hausgeraete Ochsenhausen GmbH
Publication of EP0698771A1 publication Critical patent/EP0698771A1/fr
Application granted granted Critical
Publication of EP0698771B1 publication Critical patent/EP0698771B1/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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/028—Cooled supporting means
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil

Definitions

  • the invention relates to a freezer with a housing consisting of a body part, the interior of which can be closed by a door, and with compartments and / or drawers arranged one above the other in the interior, each of which is assigned a plate evaporator arranged parallel to the compartments, at least some of which Plate evaporators consist of essentially rectangular metal plates, preferably made of aluminum, on which the refrigerant tubes, preferably made of aluminum, are held, preferably by tongues bent out of the metal plates.
  • the object of the invention is therefore to provide a freezer of the type mentioned, which can be produced in a cost-effective manner with good efficiency.
  • this object is achieved in a freezer of the generic type in that channel-like depressions are embossed into the metal plates, in which the coils lie.
  • the plate evaporators according to the invention can be produced economically because the depressions receiving the evaporator tubes can be produced by a simple stamping process.
  • the plate evaporators according to the invention are therefore very much cheaper than metal or aluminum plates pressed and connected to one another, into which the channels carrying the refrigerant are embossed according to a predetermined pattern with a mirror-image design.
  • the inventive ones are distinguished Plate evaporator from a good cooling performance, because the pipe coils carrying the refrigerant lie largely on the walls of the channel-like depressions, so that a good heat transfer is guaranteed between the pipe coils and the metal plates.
  • the profile of the channel-like depressions is expediently matched to the diameter of the tubes in such a way that they abut approximately half of their jacket essentially against the walls of the depressions.
  • the groove-like depressions are formed between base-like elevations with flat surfaces pressed out of the plate.
  • the groove-like depressions are formed between the base-like elevations, the bends of the coils lying in unembossed areas of the plate in front of the narrow sides of the base-like elevations.
  • the elevations can have an elongated rectangular shape with rounded corners.
  • the length of the elevations is expediently less than the width of the plates, so that there are unembossed parts between the elevations and the edges of the plates, in which the bends of the coils lie.
  • the straight sections of the coils between the bends can be made longer or shorter, so that the bends are at a greater or lesser distance from the narrow sides of the elevations.
  • the plate edges are advantageously angled.
  • Additional edge stiffening can be achieved by folding the edges of the plates onto themselves before they are bent are, so that there are double-layered bends after folding.
  • each plate is angled twice inwards so that the outer leg of the bend runs approximately parallel to the plate.
  • the bends of the coil can be overlapped by the outer leg of the bend, so that this not only serves to stiffen the plate but also to hold the coil.
  • At least the one bend of the plate can also be formed in that a first bend is approximately at right angles and two further bends are made in opposite directions, so that there is a U-shaped edge profile with legs transverse to the plane of the plate.
  • a particular problem with freezers is that there is a particularly large amount of heat in the upper area, because in the upper area heat can penetrate not only through the side walls, but in particular also through the large cover wall. For this reason, it was previously customary to arrange a plate evaporator consisting of pressed and connected aluminum plates under the upper top wall of the freezer with a particularly dense arrangement of the refrigerant channels, which maintains the minimum temperature of - 18 ° C in the upper cabinet area due to its increased cooling capacity.
  • Such a plate evaporator consisting of pressed aluminum plates is however several times more expensive than plate evaporators consisting of aluminum plates, on which the pipe coils carrying the refrigerant are fastened.
  • the webs are expediently bent out of the plane of the plate by an angle of approximately 45 °.
  • the problem of combining the prefabricated plate evaporator units for efficient internal transport in such a way that they take up only a small transport volume is solved according to an inventive further development in that the coils of all plate evaporators are connected to one another by essentially straight pipe sections which are essentially parallel to one another extend from the end portion of one plate side to the opposite end portion of the same side of the underlying plate.
  • the plate evaporators form a zigzag line with the pipe sections connecting them from plate evaporator to plate evaporator, so that the plate evaporator units can be folded flat for the purpose of their transport so that all plate evaporators of a plate evaporator unit lie one on top of the other.
  • the plate evaporators need only be pulled apart to the required installation distance, the pipe sections connecting the plate evaporators being twisted only slightly by an innocuous amount in their connection areas.
  • the problem of connecting the capillary tube to the injection side of the evaporator tube in a simple and safe manner is, according to an inventive development for which independent protection is claimed, solved in that the capillary tube is connected to the evaporator tube by a press connection in which the capillary tube is pushed into the middle of the evaporator tube and is flattened on both sides of the capillary tube in such a way that it surrounds it with channel-shaped half-shells corresponding to its profile.
  • the connection can be made so long that an already very tight connection is achieved.
  • the suction pipe can be connected to the evaporator pipe by a press connection.
  • this type of connection according to the invention aluminum and copper pipes that cannot be welded to one another can be connected.
  • Collecting bottles are usually arranged at the suction-side end of the evaporator tubes, in which non-evaporated refrigerant collects in such a way that the compressor only draws in evaporated refrigerant and not also liquid.
  • a collector bottle in the suction side Arranged end region of the evaporator tube is a collector bottle, which consists of a tube of larger diameter, the ends of which are connected by a press connection to the adjacent evaporator tube sections.
  • the press connection described can now normally not be completely gas-tight in the required manner. For this reason, an adhesive is introduced into the area pressing the pipes for sealing. Since this adhesive does not serve to connect the tubes, but only serves as a seal, there is no need to wait for the tubes to be further processed until the adhesive has fully hardened.
  • the plate evaporators also serve to support the drawers.
  • the plate evaporators are supported laterally on rib-like projections on the side walls.
  • these arresting holding devices are provided on the front edges and must additionally be connected to the inside of the side walls, for which purpose these are usually hammered into the side walls.
  • the rear wall of the interior clips are arranged for holding the straight pipe sections running parallel to the rear wall.
  • FIG. 1 shows a front view of a plate evaporator unit 1 consisting of three plate evaporators, namely in its position installed in a freezer, the freezer and all devices holding the plate evaporators being omitted for the sake of clarity.
  • the individual plate evaporators 2, 3 consist of aluminum plates with pipe coils held on them, all pipe coils and the connecting pipe pieces arranged between them consisting of a single continuous pipe.
  • the upper plate evaporator 2 is explained in more detail below with reference to FIG. 3 and the two lower plate evaporators 3 with reference to FIG. 4.
  • the end of the continuous pipe 4 is connected to the suction pipe of the compressor in a manner not shown.
  • the refrigerant is injected through the capillary tube 5 into the beginning of the tube.
  • the end section of the coil of the upper plate evaporator 2 is connected by the U-shaped pipe section 6 to the beginning of the coil of the plate evaporator 3 below. Accordingly, the end of the coil of the plate evaporator 3 is connected by the pipe section 6 to the beginning of the coil of the plate evaporator 3 below.
  • the straight web parts 7 of the tube sections 6 run obliquely in the manner shown in FIG. 1 from a rear end of the upper plate evaporator to the other rear end of the plate evaporator underneath, so that the plate evaporator units 1 can be folded up before being installed in such a way that the individual plate evaporators 2, 3 lie flat on top of one another. Since the pipe sections 7 connecting the plate evaporators run parallel to the rear wall, they can be fastened by clips to the rear wall, so that the plate evaporators 2, 3 are fixed in the freezer by this fastening and cannot be pulled out unintentionally.
  • a collecting bottle 8 is switched on, in which unevaporated refrigerant collects, so that the compressor only sucks in gaseous refrigerant via the suction tube.
  • the upper plate evaporator 2 consists of an aluminum plate 10, from which base-like elevations 11 lying parallel to one another in the deep-drawing process are pressed out, in such a way that half-shell-shaped channel-like depressions 12 are formed between two base-like elevations 11, in which the straight tube sections 13 of the coolant Pipe coils lie.
  • the base-like elevations 11 essentially have the shape of elongated rectangles, the corners 14 of the base-like elevations being rounded.
  • 11 retaining tongues 16, 17 are cut out of the plate 10 or the flat surfaces of the base-like elevations. The longer holding tongues 16 are placed in a bottle-like manner over the straight tube sections 13 in the manner shown in FIG.
  • FIG. 10 the individual steps of laying the tongue 16 'around the pipe section 13 and the raised tongues 17' are shown in dash-dotted lines.
  • the lifting of the tongues 17 is done for the purpose of to put front ends of the bottle-like bent tongues 16 under the retaining tongues 17. As soon as the ends of the tongues 16 are pushed under the tongues 17, the bottle connection is pressed.
  • the flat surfaces of the base-like elevations are provided in the manner shown in FIG. 3 with cuts 18 running transversely to the trough-shaped depressions 12 and parallel to one another, so that lamellar webs 19 are cut out of the plate through these. These webs 19 are then inclined by about 45 ° in the manner shown in FIGS. 5 and 9, so that lamellar grate or lattice parts result which form passage gaps for the air.
  • FIG. 4 shows one of the lower plate evaporators 3. This also consists of an aluminum plate 20 from which tongues 21 for holding the straight sections of the coils are cut out. To hold the straight sections of the coils, the tongues 21 are rolled up around the straight pipe sections 13 in the manner shown in FIG. 11.
  • the front and rear side edges of the plate evaporators 2, 3 are stiffened by bending.
  • the type of front bend is shown in FIGS. 6 and 7.
  • the angled area is first folded onto itself so that it is double-layered.
  • the angled area is then angled twice around the folded edges 24 and 25, so that there is a U open to the inside.
  • the straight sections of the coils can also be shortened if only a lower cooling capacity is required, so that the bends 27 'on one side of the coils end in the middle region of the plates and in any case at a distance from the rear edge region.
  • the rear side edge of the plate evaporator is stiffened by a bend shown in FIGS. 6 and 8.
  • the edge region is first angled downwards around the folded edge 30 and then outward through two further folded edges 31, 32, so that a U-shaped edge results, the legs of this edge profile being transverse to the plane of the plate.
  • the narrow side edges of the plate evaporators are also provided with simple bevels 33 in the manner shown in FIG. 6.
  • the freezer according to the invention is further characterized in that both the evaporator plates and the pipes and pipe coils carrying the refrigerant preferably consist of aluminum or aluminum alloys which are not painted, so that freezers provided with the plate evaporators according to the invention can be disposed of cheaply by material sorting to let.

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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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Saccharide Compounds (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP95104853A 1994-08-22 1995-03-31 Congélateur Expired - Lifetime EP0698771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9413511U 1994-08-22
DE9413511U DE9413511U1 (de) 1994-08-22 1994-08-22 Gefrierschrank

Publications (2)

Publication Number Publication Date
EP0698771A1 true EP0698771A1 (fr) 1996-02-28
EP0698771B1 EP0698771B1 (fr) 1998-06-24

Family

ID=6912679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104853A Expired - Lifetime EP0698771B1 (fr) 1994-08-22 1995-03-31 Congélateur

Country Status (3)

Country Link
EP (1) EP0698771B1 (fr)
JP (1) JPH0868586A (fr)
DE (2) DE9413511U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1267137A1 (fr) * 2001-06-12 2002-12-18 Whirlpool Corporation Congélateur vertical et réfrigérateur le comprenant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10300703B4 (de) * 2003-01-10 2006-04-13 Liebherr-Hausgeräte GmbH Gefriergerät und Enteisungsverfahren
DE102009015752A1 (de) * 2009-01-22 2010-07-29 Liebherr-Hausgeräte Lienz Gmbh Verfahren zur Herstellung eines Verdampfers
CN113267070B (zh) * 2021-05-28 2022-06-10 衡水新工质能源科技有限公司 一种耐高压宽通道平板换热器
CN115479427B (zh) * 2021-06-16 2023-08-15 青岛海尔电冰箱有限公司 冰箱

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773362A (en) * 1953-05-18 1956-12-11 Whirlpool Seeger Corp Refrigerators for freezing food and storage of frozen food
FR2094055A1 (fr) * 1970-06-04 1972-02-04 Benteler Werke Ag
FR2538513A1 (fr) * 1982-12-22 1984-06-29 Bosch Siemens Hausgeraete Systeme evaporateur pour meubles congelateurs et en particulier pour armoires frigorifiques menageres ou autres
DE3305764A1 (de) * 1983-02-19 1984-08-23 R. & G. Schmöle Metallwerke GmbH & Co KG, 5750 Menden Verdampfer fuer gefrierschraenke
FR2631688A3 (fr) * 1988-05-04 1989-11-24 Whirlpool Int Evaporateur pour un refrigerateur
EP0447763A1 (fr) * 1990-03-21 1991-09-25 Helmut Lingemann GmbH & Co. Condensateur à plaques pour machine frigorifique, en particulier pour un réfrigérateur domestique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247604A1 (de) * 1982-12-22 1984-07-05 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verdampfersystem fuer gefriermoebel, insbesondere haushalts-gefrierschraenke oder dgl.
DE8629304U1 (de) * 1986-11-03 1987-01-08 Bauknecht Hausgeräte GmbH, 7000 Stuttgart Halterung für Rohre und/oder elektrische Leitungen an einem Wandabschnitt eines Kühlgerätes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773362A (en) * 1953-05-18 1956-12-11 Whirlpool Seeger Corp Refrigerators for freezing food and storage of frozen food
FR2094055A1 (fr) * 1970-06-04 1972-02-04 Benteler Werke Ag
FR2538513A1 (fr) * 1982-12-22 1984-06-29 Bosch Siemens Hausgeraete Systeme evaporateur pour meubles congelateurs et en particulier pour armoires frigorifiques menageres ou autres
DE3305764A1 (de) * 1983-02-19 1984-08-23 R. & G. Schmöle Metallwerke GmbH & Co KG, 5750 Menden Verdampfer fuer gefrierschraenke
FR2631688A3 (fr) * 1988-05-04 1989-11-24 Whirlpool Int Evaporateur pour un refrigerateur
EP0447763A1 (fr) * 1990-03-21 1991-09-25 Helmut Lingemann GmbH & Co. Condensateur à plaques pour machine frigorifique, en particulier pour un réfrigérateur domestique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1267137A1 (fr) * 2001-06-12 2002-12-18 Whirlpool Corporation Congélateur vertical et réfrigérateur le comprenant

Also Published As

Publication number Publication date
EP0698771B1 (fr) 1998-06-24
DE9413511U1 (de) 1995-12-21
JPH0868586A (ja) 1996-03-12
DE59502643D1 (de) 1998-07-30

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