EP0758732B1 - Réfrigérateur - Google Patents

Réfrigérateur Download PDF

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Publication number
EP0758732B1
EP0758732B1 EP19960112307 EP96112307A EP0758732B1 EP 0758732 B1 EP0758732 B1 EP 0758732B1 EP 19960112307 EP19960112307 EP 19960112307 EP 96112307 A EP96112307 A EP 96112307A EP 0758732 B1 EP0758732 B1 EP 0758732B1
Authority
EP
European Patent Office
Prior art keywords
evaporator
plate
cooling space
refrigerator
refrigerant
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
EP19960112307
Other languages
German (de)
English (en)
Other versions
EP0758732A2 (fr
EP0758732A3 (fr
Inventor
Eugen Schmid
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
Priority claimed from DE29603716U external-priority patent/DE29603716U1/de
Application filed by Liebherr Hausgeraete Ochsenhausen GmbH, Liebherr Hausgeraete GmbH filed Critical Liebherr Hausgeraete Ochsenhausen GmbH
Publication of EP0758732A2 publication Critical patent/EP0758732A2/fr
Publication of EP0758732A3 publication Critical patent/EP0758732A3/fr
Application granted granted Critical
Publication of EP0758732B1 publication Critical patent/EP0758732B1/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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/022—Evaporators with plate-like or laminated elements
    • F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
    • 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
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/08—Refrigerator tables
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the invention relates to a refrigerator with a normal cold room, preferably with a normal cold room and a freezer compartment, whose evaporator consists of two evaporator sections connected in series with pipe sections carrying the refrigerant, of which the section in which the with a control device provided compressor that introduces refrigerant, the freezer compartment assigned.
  • thermostat The usual control of a refrigerator with freezer takes place by a thermostat, the temperature sensor of which is in the normal cold room and preferably located on the evaporator plate.
  • the Switch-on values of this thermostat are designed so that the Evaporator section for the normal cold room in every switch-off phase defrosting the compressor. To do this, the temperature on the surface the evaporator of the normal cold room at least above 0 ° C increase. Switch-on values of the thermostat at 3 ° C are common up to 5 ° C. This means that in the case where the switch-on value of the thermostat is, for example, 5 ° C, at one The ambient temperature drops below 5 ° C at all no longer switches on, so that the temperature inevitably increases in the freezer.
  • the goods in the freezer compartment can then heat until thawing so that the cooling device is no longer is fully functional. Even at ambient temperatures above 5 ° C to about 9 ° C there are still significant problems, the required Observe the minimum temperature in the freezer compartment because of the relative Duty cycle of the compressor is too short for to provide the evaporator compartment with the required cooling capacity.
  • the relative duty cycle of the compressor to the minimum to coordinate the required cooling capacity of the freezer compartment.
  • the cooling requirement for the refrigerator compartment is very small.
  • the cold room evaporator connected in series with the freezer evaporator is, the cold room evaporator also receives due to the on Cold requirement of the freezer compartment coordinated relative duty cycle the compressor has a relatively large amount of refrigerant. In order not to overcool the normal cold room, the cold room evaporator is made very small.
  • the cold room evaporator forms in addition to its function as a heat exchanger Dehumidification plate, on which the condensate is deposited, so that the condensed water is targeted from the cold room evaporator drain in gutters and over them, for example for evaporation to the compressor can.
  • Cooling space evaporator formed dehumidification area become too small, so that there is condensation on other parts of the Cold room can come, preferably on the cooling compartment ceiling, which is due to the neighboring freezer compartment on a lower one are below the dew point temperature can, and on the glass plates.
  • the problem of unwanted condensation in other places than on the cold room evaporator plate is not just about Refrigerators with a normal cold room and a freezer compartment, but also for refrigerators that do not have a freezer compartment.
  • the object of the invention is therefore a refrigerator of the beginning to create specified type, in which one leads to a dripping Condensation on parts of the refrigerator other than that Cold room evaporator is prevented.
  • this object is achieved at the beginning with a cooling device specified type solved in that the normal cold room assigned evaporator or evaporator section from a plate consists of a good heat-conducting material, the size of which is used for Dehumidification required area is designed, and that the plate thus connected to the pipe section carrying the refrigerant is that the temperature distribution is essentially the same the cooling capacity required for the normal cold room becomes.
  • Cooling capacity per surface is too large.
  • Such a small chilled one Area with high cooling capacity leads to dehumidification essentially only in the vicinity of the cooling surface, so that the moisture in the areas of the normal cold room enriches that of the area supplying the cooling capacity are further away.
  • the supply of cooling power through a Small area also has the disadvantage that it is too freezing of this surface can occur, which reduces the cooling capacity sinks.
  • the cooling capacity per Reduced area of the evaporator plate so that it the required Cooling capacity with a reduced surface temperature supplies.
  • the normal cold room assigned evaporator plate designed so large that it forms a sufficiently large dehumidification area, and secondly kept at such a temperature that it needed the Cooling power supplies.
  • the pipe section carrying the refrigerant can be used with the cooling space evaporator plate only over part of its length and / or over Heat poorer conductive material, such that the normal cold room despite the enlarged plate due to thermal Decoupling only the required cooling capacity is supplied.
  • the connected to the evaporator plate of the normal cold room or running in this plate and leading the refrigerant Pipe section corresponding to the heat output to be transferred Has length.
  • the pipe section can be clamped or conventional connections directly to the evaporator plate connected or integrated into the plate as is the case with roll or Z-bond evaporator boards is.
  • the refrigerant pipe section at least is connected to the plate over part of its length, or runs in this and that the plate with recesses or window-like Breakthroughs is provided.
  • the plate with recesses or window-like Breakthroughs can be the total area that the evaporator plate its outline after occupies, enlarge it further so that the flat Area over which the cooling capacity is supplied, still further is enlarged.
  • the plate is expediently provided with rows of cutouts, the pipe sections carrying the refrigerant between run in rows.
  • the pipe sections carrying the refrigerant expediently run, apart from the marginal rows, only between every other row of recesses. This way, in each section of the evaporator plate, which has the rows of recesses is provided, the cold is introduced only from one side, so that there is a particularly good, even temperature distribution comes over the plate.
  • the thermal Coupling of the pipe section assigned to the normal cold room selected on the evaporator plate of the normal cold room is that their temperature is substantially below the dew point temperature lies.
  • the size of the evaporator plate and their thermal coupling to the refrigerant Pipe section expediently chosen so that on the Condensate that temporarily forms the cooling compartment ceiling evaporates again and then settles on the evaporator plate of the normal cold room, if their temperature after restarting the compressor again below the dew point temperature and the temperature the cooling compartment ceiling is located.
  • the one that is assigned to the normal cold room Evaporator plate designed so large that it is sufficient forms large dehumidification area, and so thermally to the the refrigerant pipe section coupled or at complete heat-conducting connection with the evaporator plate only run so long that the surface temperature of the evaporator plate is just below the dew point. So that leaves a significantly larger surface area in the normal cold room, arrange an evaporator plate forming a heat exchanger or due to a much larger wall area of the normal cold room, if the evaporator is foamed in behind the cold room wall, supply the cooling capacity without the cooling capacity for the Normal cold room becomes too large and the cold room temperature as a result sinks too far.
  • the wall surface can be the cooling capacity is supplied to the normal cooling room, clearly enlarge.
  • the recesses themselves are made by the existing plastic wall of the normal cold room closed so that the temperature during the switch-on phases the compressor from the edges of the recesses to their middle Areas gradually decreases, so that the recessed Areas still participate in the transmission of the cooling capacity.
  • the arrangement of the recesses in the evaporator plate enables once the direct connection of the refrigerant leading Pipe section with this or the integration of this Section in this, so the reproducibility of the transfer the cooling capacity on the evaporator plate is cheaper than with a point-only coupling or a coupling only over short distances or insulating materials to the evaporator plate.
  • the type of thermal coupling of the pipe section to the evaporator plate or the length of that connected to the evaporator plate Leave the pipe section and the size of the evaporator plate calculate for the different types of cooling units or also determine empirically.
  • the surface of the evaporator plate of the normal cold room so large that they its function as a dehumidifying plate, the thermal coupling of the dehumidification and evaporator plate the pipe section carrying the refrigerant or its length to make and choose that the cooling capacity is not too gets high and still during the start-up phases of the compressor the dew point temperature is fallen below.
  • the liquefied refrigerant is sent to the evaporator via a capillary tube fed, which forms a throttle body. Because that liquefied Refrigerant has a relatively high temperature which leads the liquefied refrigerant to the capillary tube Line in the suction line through which the compressor evaporated refrigerant is sucked out of the evaporator. This will the liquefied refrigerant is cooled because the one in the intake manifold Refrigerant vapor is still on a proportionate basis low temperature. Nevertheless, this is in the capillary tube relaxed refrigerant before this still on a higher Temperature so that the residual heat of the refrigerant is dissipated must become what worsens the energy balance.
  • This feed of heat to the cold room evaporator plate is not only in the Vaporizer plate according to the invention expedient, which only with reduced Heat conduction to the pipe section carrying the refrigerant is coupled, but also with conventional cooling devices with 3-star subject. Because with cooling devices it is known at ambient temperatures below normal ambient temperatures a heating device in the normal cold room or behind the wall to arrange the normal cold room, the heat the normal cold room feeds if due to the too small temperature difference between the temperature of the normal cold room and the ambient temperature a temperature that ensures the target temperature in the freezer compartment, relative duty cycle of the compressor is no longer reached becomes. The supply of heat to the cold room evaporator a section of the conduit carrying the liquefied refrigerant can therefore be an additional heating device in the normal cold room make redundant.
  • the transition area of the evaporator is between the deep-freeze evaporator section and the normal cold room evaporator section, located in the area of the normal cold room, critical because this transition area is on a deeper level Temperature as the main area of the freezer evaporator is located, so that this transition part in an undesirable manner tends to freeze.
  • a further preferred embodiment of the invention for the independent protection is claimed, provided that a Section of the liquefied refrigerant leading to the capillary Pipe in the transition area between the two evaporator sections is installed in or near the normal cold room.
  • This liquefied refrigerant is expediently located leading line section in thermally conductive connection with the Transition area, so that it is ensured that this critical Transition area during compressor downtimes defrosts.
  • the cooling device shown schematically with reference to FIGS. 3 and 4 Conventional type consists of a housing 1 with an outer shell and Inner shell, with the space between the shells to Thermal insulation is foamed with a polyurethane foam.
  • the U-shaped curved evaporator section assigned to the freezer compartment 2 3 is arranged behind the shell of the freezer compartment and foamed.
  • the evaporator section assigned to the normal cooling space 4 5 is behind the inner normal cold room shell foamed.
  • Both evaporator sections 3, 5 are made of one common roll or Z-bond evaporator board bent out and connected to each other by a narrow board strip 6, in which the lines are arranged through which the two Evaporator sections are connected in series with each other.
  • the condenser is in the usual way behind the rear wall of the refrigerator 7 arranged and in a niche of the refrigerator housing
  • the compressor 8 is located on the cold room evaporator section a thermostat 9 is arranged, which the starting frequency controls the compressor.
  • a cooling device of this type can at high ambient temperatures and / or high humidity and / or high door opening frequency condensate on the cooling compartment ceiling below of the freezer or on glass plates so that Can drain water.
  • FIG. 3 a refrigerator can be seen, in which a corresponding the small cooling requirement of the normal cold room in size reduced evaporator plate 10 arranged in the normal cold room whose lower edge is indicated by the dashed line 11 is.
  • the front and the Back are effective as dehumidifying surfaces, the entire range is sufficient Size of the dehumidification area due to the reduced normal cold room evaporator not out to the normal cold room completely to dehumidify and condensation, for example to prevent the normal cold room ceiling.
  • the only point or section connection of the refrigerant leading coil 14 with the dehumidifying evaporator plate 10, 12 can in the usual way by spot welding, crimping, Glue or clamp connections.
  • FIG. 4 is a schematic plan view of a behind the Evaporator plate 15 foamed into the rear wall of a normal cooling space seen.
  • This consists of a so-called roll or Z-bond evaporator board, in the roughly rectangular course the pipe section 16 carrying the refrigerant is arranged.
  • the board is with four rows of side by side rectangular recesses 17 provided.
  • the influence of the vertical branches of the pipe section is neglected here. This could go through this bordering lateral, gap-shaped recesses diminished become.
  • each row of recesses 17 their cooling capacities essentially only from a horizontal one Branch of the pipe section, they run at a board with four rows of recesses between the first and second and between third and fourth rows, so that they are spaced from the top and bottom from a and from each other have a distance of aa.

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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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (10)

  1. Appareil de réfrigération avec une enceinte de réfrigération normale et avec un compartiment de congélation dont l'évaporateur est constitué de deux sections d'évaporation montées en série avec des tronçons tubulaires guidant le fluide frigorigène, dont le tronçon dans lequel le compresseur pourvu d'une installation de commande introduit le fluide frigorigène, est associé au compartiment de congélation, caractérisé en ce que l'évaporateur respectivement la section d'évaporation associée à l'enceinte de réfrigération normale est constitué d'une plaque d'un matériau bon conducteur de chaleur dont la grandeur est conçue en fonction de la face requise pour la déshumidification, et
    en ce que la plaque est reliée de telle sorte au tronçon tubulaire guidant le fluide frigorigène qu'il est acheminé à celle-ci, avec une répartition de température sensiblement égale, la capacité frigorifique requise pour l'enceinte de réfrigération normale.
  2. Appareil de réfrigération selon la revendication 1, caractérisé en ce que le tronçon tubulaire guidant le fluide frigorigène est relié à la plaque d'évaporation de l'enceinte de réfrigération seulement sur une partie de sa longueur et/ou par un matériau conduisant moins bien la chaleur de telle sorte qu'il est acheminé à l'enceinte de réfrigération normale, en dépit de la plaque agrandie, par découplage thermique, seulement la capacité frigorifique requise.
  3. Appareil de réfrigération selon la revendication 1, caractérisé en ce que le tronçon tubulaire relié à la plaque d'évaporation de l'enceinte de refroidissement ou s'étendant dans cette plaque a une longueur correspondant à la capacité frigorifique à transférer.
  4. Appareil de réfrigération selon la revendication 1, caractérisé en ce que le tronçon tubulaire guidant le fluide frigorigène est relié à la plaque d'évaporation de l'enceinte de réfrigération au moins sur une partie de sa longueur ou s'étend dans celle-ci, et en ce que la plaque est pourvue d'évidements ou de perçages semblables à des fenêtres.
  5. Appareil de réfrigération selon la revendication 3 ou 4, caractérisé en ce que la plaque d'évaporation de l'enceinte de réfrigération présente des rangées d'évidements, et en ce que des parties du tronçon tubulaire relié à celle-ci s'étendent entre les rangées.
  6. Appareil de réfrigération selon la revendication 5, caractérisé en ce que des parties du tronçon tubulaire, à part les rangées au côté des bords, s'étendent seulement entre chaque deuxième rangée.
  7. Appareil de réfrigération selon l'une des revendications 1 à 6, caractérisé en ce que la plaque d'évaporation est réalisée par moussage derrière au moins une paroi de l'enceinte de réfrigération normale, de préférence derrière la paroi arrière.
  8. Appareil de réfrigération selon l'une des revendications 1 à 7, caractérisé en ce que le couplage thermique du tronçon tubulaire associé à l'enceinte de réfrigération normale à la plaque d'évaporation de l'enceinte de réfrigération normale ou à la longueur reliée à celle-ci est sélectionné de telle sorte que la température de la plaque d'évaporation de l'enceinte de réfrigération normale respectivement la température de la paroi de l'enceinte de réfrigération normale, derrière laquelle la plaque d'évaporation est réalisée par moussage, se situe sensiblement sous la température du point de condensation.
  9. Appareil de réfrigération selon l'une des revendications précédentes, caractérisé en ce qu'un tronçon du conduit menant l'agent frigorigène liquéfié au tube capillaire est en liaison de conduction de chaleur avec la plaque d'évaporation de l'enceinte de réfrigération normale.
  10. Appareil de réfrigération selon l'une des revendications précédentes, caractérisé en ce qu'un tronçon du conduit menant de l'agent frigorigène liquéfié au tube capillaire est posé dans la zone de transition entre les deux tronçons d'évaporation dans ou à proximité de l'enceinte de réfrigération et est en liaison de conduction de chaleur avec cette zone de transition.
EP19960112307 1995-08-16 1996-07-30 Réfrigérateur Expired - Lifetime EP0758732B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE29513175 1995-08-16
DE29513175U 1995-08-16
DE29603716U 1996-02-29
DE29603716U DE29603716U1 (de) 1995-08-16 1996-02-29 Kühlgerät

Publications (3)

Publication Number Publication Date
EP0758732A2 EP0758732A2 (fr) 1997-02-19
EP0758732A3 EP0758732A3 (fr) 2000-07-12
EP0758732B1 true EP0758732B1 (fr) 2002-12-04

Family

ID=26058140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960112307 Expired - Lifetime EP0758732B1 (fr) 1995-08-16 1996-07-30 Réfrigérateur

Country Status (2)

Country Link
EP (1) EP0758732B1 (fr)
ES (1) ES2099057T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29716572U1 (de) 1997-09-15 1997-12-04 Liebherr-Hausgeräte GmbH, 88416 Ochsenhausen Kühlgerät mit einem Normalkühlraum und einem Tiefkühlfach
IT246294Y1 (it) * 1998-01-09 2002-04-08 Whirlpool Co Frigorifero domestico
DE20001253U1 (de) 2000-01-25 2001-06-07 Liebherr-Hausgeräte GmbH, 88416 Ochsenhausen Kühlgerät mit einem Kühl-, einem Kaltlager- und einem Gefrierfach
KR100451221B1 (ko) * 2001-11-16 2004-10-02 엘지전자 주식회사 가연성 냉매를 이용한 직냉식 냉장고
DE202023102953U1 (de) 2023-05-30 2023-06-21 BINDER GmbH Rollbond-Verdampfer-Platte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390808A (en) * 1943-07-21 1945-12-11 Gen Electric Refrigerator
US2640329A (en) * 1949-09-24 1953-06-02 Ingvardsen Johan Freder Ingvar Cold plate with means to prevent condensation
FR2193186A1 (fr) * 1972-07-20 1974-02-15 Soissonnais Manufacture
FR2203687B1 (fr) * 1972-10-20 1975-06-13 Bonnet Ets
DD108809A1 (fr) * 1973-04-12 1974-10-05
DE3306869A1 (de) * 1983-02-26 1984-08-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kuehlgeraet mit einem waermeuebertrager

Also Published As

Publication number Publication date
ES2099057T1 (es) 1997-05-16
EP0758732A2 (fr) 1997-02-19
ES2099057T3 (es) 2003-07-01
EP0758732A3 (fr) 2000-07-12

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