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EP0571331B1 - Meuble pour refroidissement - Google Patents

Meuble pour refroidissement Download PDF

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Publication number
EP0571331B1
EP0571331B1 EP93810360A EP93810360A EP0571331B1 EP 0571331 B1 EP0571331 B1 EP 0571331B1 EP 93810360 A EP93810360 A EP 93810360A EP 93810360 A EP93810360 A EP 93810360A EP 0571331 B1 EP0571331 B1 EP 0571331B1
Authority
EP
European Patent Office
Prior art keywords
air
space
display surface
cooling element
air outlet
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
EP93810360A
Other languages
German (de)
English (en)
Other versions
EP0571331A1 (fr
Inventor
Eberhard Buob
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.)
Buob Kuehlmobel
Original Assignee
Buob Kuehlmobel
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 Buob Kuehlmobel filed Critical Buob Kuehlmobel
Publication of EP0571331A1 publication Critical patent/EP0571331A1/fr
Application granted granted Critical
Publication of EP0571331B1 publication Critical patent/EP0571331B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0482—Details common to both closed and open types
    • A47F3/0495—Spraying, trickling or humidifying means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0465—Cases or cabinets of the open type with natural air circulation

Definitions

  • the invention relates to a refrigerator for the display of food in shops according to the preamble of claim 1.
  • an air access slot is provided above the cooling element, into which warm room air can enter, pass the cooling element and, cooled there, exit through the slot at the height of the display surface and can slowly distribute itself over the display surface.
  • a refrigerated display case in which evaporators are arranged under the working body, which cool heated air that is sucked in directly under the work surface.
  • the cooled air flows from the evaporators in a tapered channel under the display surface to the opposite side of the display and leaves the room to flow back over the display surface to the inlet opening above the evaporators.
  • a refrigerated display case with a strongly V-shaped sloping bottom under the flat display surface is known.
  • the space under the display surface is separated into two sections by an intermediate wall near the evaporator.
  • a fan is arranged in the intermediate wall, which sucks in the air cooled at the evaporator from the first room section and blows it into the second larger room.
  • a flap in the larger room is used to guide the air blown in by the fan through a humidifier or past it. Both the wall dividing the room into two sections and the flap parallel to it prevent natural convection.
  • the inclination of the two floor areas is so large that tests have confirmed that natural circulation cannot get going because a deep-sea lake forms at the deepest point, which interrupts the circulation.
  • the invention seeks to remedy this.
  • the invention as defined in the characterizing features of claim 1, solves the problem of creating a piece of refrigerated furniture which enables a regular circulation and distribution of the cold air over the entire delivery without the use of a fan.
  • the v-shaped design of the bottom of the channel under the display surface through which the air flows from the evaporator before it emerges on the opposite side into the display surface, creates a perfect circulation above the display and at a distance from the display surface , so that a cold air lake is created under the circulating cold air.
  • the air flow of the cold air can be obtained without the use of a fan. Due to the gradual heating of the air in the second section of the room under the display surface, it rises, exits through the air outlet slot and pulls the air flowing under the floor with it.
  • the resultant, closed circulation of the air flow under the delivery surface and over the goods to be cooled on the one hand achieves an excellent cooling temperature, which is constant above all over the delivery area, and on the other hand the cold air that inevitably heats up when the delivery surface overflows completely bypass the cooling element.
  • An overflow of cold air over the work surface and thereby a loss of cooled air, which must be replaced by warm air, is completely eliminated. From this essentially complete circulation, one results Energy savings with optimal cooling of the entire display area of 30-40%. If the cold air flow over the display surface is disturbed when removing food stored there, the essentially laminar flow is rebuilt within a few seconds; A build-up of cold air above the level of the work surface can be completely prevented.
  • reference number 1 shows a refrigerator, as is used above all in butchers, cheese shops and grocery stores.
  • a cover 5 made of glass or plexiglass is arranged on the buyer side above a flat or step-shaped display surface 7 and protects the goods 9 to be cooled from contamination.
  • the refrigerated cabinet 1 has a work surface 11, under which a cooling element 13, for example an evaporator or coolant-carrying lines 14 with corresponding fins for releasing the cold to the air flowing past the cooling element 13.
  • the cooling element 13 is not explained in detail, since it is constructed in a known manner, but preferably with large-area evaporator elements, in order to allow air to circulate without fans.
  • the display surface 7 preferably consists of a stainless steel trough 15.
  • a space 23 is formed under this trough 15 by two surface sections 17 and 19 arranged at an angle of 2 ° to 10 ° to the horizontal.
  • a channel 25 can be formed, to which a condensate drain line 27 is connected.
  • the space 23 is connected through an air outlet slot 29 to a cooling space 31, which contains the cooling element 13.
  • the space 23 is connected to the display surface 7 by an air outflow slot 33, which is located at the top in the space 23, and opens out via the display surface 7.
  • the cooling space 31 has an air inlet slot 37 along its upper cover 35, which connects the space above the display surface to the cooling space 31.
  • the air inlet slot 37 is higher than the air outlet slot 33 on the opposite side of the display surface 7. All the cooled air leaves the cooling space 31 in the region below the display surface 7 through the air outlet slot 29.
  • a moisture dispenser 39 (ultrasonic atomizer) can also be arranged, with which the cooled air can be enriched with water mist to further increase the humidity of the circulating cold air.
  • a high basic moisture can already due to the system can be achieved through the closed, low-loss cycle.
  • the cross section of the air inlet slot 37 to the cooling space 31 is preferably smaller than the cross section of the air outlet slot 33 on the opposite side of the display surface.
  • the ratio of the cross-sectional areas can be approximately 5 to 6 to 4 to 5.
  • the side of the cover 5 is closed off by a wall 41 in order to prevent air circulation inside the refrigerator.
  • the display surface 7 is open to the operating personnel from the side of the work surface 11.
  • the cold air - already warmed somewhat by contact with the display surface 7 - flows through the air outlet slot 33, which is higher than the air outlet slot 29, onto the display surface 7 and is flowing continuously at a distance above it stored goods 9 away to the air inlet slot 37 above the cooling element 13.
  • a continuous flow flows automatically Flow of cold air from the cooling element 13 under the display surface 7 through the space 23 and back from there via the refrigerated goods 9 to the cooling element 13.
  • the suction effect at the air inlet slot 37 is so strong that essentially all of the cold circulation air is sucked in and cooled again.
  • Turbulence caused by the removal of refrigerated goods 9 from the display surface 7 is immediately smoothed out by the flowing air extending over the entire length of the refrigerated cabinet 1 and prevents it from rising into the area above the air inlet slot 37. Due to the arrangement of the air outlet slot 33 a few centimeters The delivery surface 7 has the effect that the cold air flow is not substantially disturbed by the refrigerated goods 9 and this comes to lie completely or almost completely below the cold air flow zone.
  • the refrigerated goods 9 are consequently located between the bottom 9 of the display surface 7, which is cooled by the air flow flowing from below through the space 23, and the compact cooling air blanket flowing over the display surface 7 in a cold air lake, the cooling air blanket behaving similarly to a high fog blanket over a valley. The moisture under the cooling air ceiling in the food area remains relatively high.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Liquid Crystal Substances (AREA)

Claims (6)

  1. Meuble de réfrigération pour l'exposition de denrées alimentaires dans des points de vente, avec une surface d'étalage (7) dont l'arrière est limité par une surface de travail (11) plus élevée et les parties avant ainsi que les sections visibles pour le public par un élément de couverture (5) transparent, pourvu d'un élément de réfrigération (13) s'étendant longitudinalement à la surface d'étalage (7) et disposé en-dessous de la surface de travail (11) derrière la paroi arrière de la surface d'étalage (7), une fente d'entrée d'air (37) étant formée au-dessus de l'élément de réfrigération (13) et de la surface d'étalage (7) et une fente d'évacuation d'air destinée à l'évacuation en-dessous de la surface d'étalage (7) de l'air refroidi par l'élément de réfrigération (13) dans un espace (23) étant formée en-dessous de la surface d'étalage (7), le fond de l'espace (23) étant inclinée à l'horizontale et pourvu en son point le plus bas d'une voie d'écoulement (25, 27) pour l'eau de condensation, caractérisé en ce que l'espace (23) situé en-dessous de la surface d'étalage (7) est formé en une seule partie entre la fente d'évacuation (29) disposée en-dessous de l'élément de réfrigération (13) et la fente d'échappement d'air (33) et en ce que le fond de l'espace (23) est incliné vers le bas dans une première section (17) du côté de l'élément de réfrigération (13), élargissant ainsi l'espace (23) et est ensuite, dans une seconde section (19), incliné vers le haut en direction de la fente d'échappement d'air (33), rétrécissant ainsi l'espace (23), l'inclinaison par rapport à l'horizontale des sections (17, 19) du fond de l'espace (23) étant respectivement comprise entre 2° et 10° de manière à ce que l'air refroidi dans l'élément de réfrigération (13) puisse d'abord se diriger vers le point le plus bas de l'espace (23) sans qu'il soit nécessaire d'utiliser un ventilateur et sous le seul effet de la pesanteur pour remonter ensuite vers la fente d'échappement d'air (33) sous l'effet du réchauffement sur la paroi inférieure de la surface d'étalage (7) et sortir de l'espace (23) par la fente d'échappement de l'air (33).
  2. Meuble de réfrigération selon la revendication 1 caractérisé en ce que la section de la fente d'entrée d'air (37) est inférieure à celle de la fente d'échappement d'air (33).
  3. Meuble de réfrigération selon la revendication 2 caractérisé en ce que le rapport entre la section de la fente d'entrée de l'air (37) et la fente d'échappement de l'air (33) est d'à peu près 4:5.
  4. Meuble de réfrigération selon la revendication 1 caractérisé en ce que l'inclinaison des sections (17, 19) est de 3°.
  5. Meuble de réfrigération selon l'une des revendication 1 à 4 caractérisé en ce qu'au point le plus bas de l'espace (23), on a formé, entre les sections (17, 19), une rigole (25) pourvue d'un conduit de décharge (27) l'eau de condensation.
  6. Meuble de réfrigération selon l'une des revendication 1 à 5 caractérisé en ce qu'on a disposé un humidificateur (39) dans la zone de circulation de l'air froid.
EP93810360A 1992-05-18 1993-05-14 Meuble pour refroidissement Expired - Lifetime EP0571331B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH160692 1992-05-18
CH1606/92 1992-05-18

Publications (2)

Publication Number Publication Date
EP0571331A1 EP0571331A1 (fr) 1993-11-24
EP0571331B1 true EP0571331B1 (fr) 1997-01-02

Family

ID=4214358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810360A Expired - Lifetime EP0571331B1 (fr) 1992-05-18 1993-05-14 Meuble pour refroidissement

Country Status (3)

Country Link
EP (1) EP0571331B1 (fr)
AT (1) ATE146949T1 (fr)
DE (1) DE59304940D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0958766A1 (fr) 1998-05-23 1999-11-24 Wälchli, Hans, Dr. Comptoir frigorifique
FR2821730A1 (fr) 2001-03-08 2002-09-13 Fun Air Vitrine refrigeree pour la presentaiton de produits alimentaires
IT1392252B1 (it) 2008-12-02 2012-02-22 Mondial Group Srl Espositore refrigerato perfezionato, in particolare per gelati mantecati.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB596075A (en) * 1945-07-17 1947-12-29 Hussmann Ligonier Company Open refrigerated display case
GB1281089A (en) * 1969-06-27 1972-07-12 Turner Brothers Asbest Reinforced thermoplastic material
CH653432A5 (de) * 1981-02-27 1985-12-31 Hoegger & Cie Ag C Verfahren zur kuehlung einer kuehlvitrine fuer lebensmittel.

Also Published As

Publication number Publication date
ATE146949T1 (de) 1997-01-15
DE59304940D1 (de) 1997-02-13
EP0571331A1 (fr) 1993-11-24

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