EP0541172B1 - Réfrigérateur à plusieurs compartiments sans formation de givre - Google Patents

Réfrigérateur à plusieurs compartiments sans formation de givre Download PDF

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Publication number
EP0541172B1
EP0541172B1 EP92203374A EP92203374A EP0541172B1 EP 0541172 B1 EP0541172 B1 EP 0541172B1 EP 92203374 A EP92203374 A EP 92203374A EP 92203374 A EP92203374 A EP 92203374A EP 0541172 B1 EP0541172 B1 EP 0541172B1
Authority
EP
European Patent Office
Prior art keywords
compartment
evaporator
lower temperature
temperature
refrigerator
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
EP92203374A
Other languages
German (de)
English (en)
Other versions
EP0541172A2 (fr
EP0541172A3 (fr
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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 Candy SpA filed Critical Candy SpA
Publication of EP0541172A2 publication Critical patent/EP0541172A2/fr
Publication of EP0541172A3 publication Critical patent/EP0541172A3/fr
Application granted granted Critical
Publication of EP0541172B1 publication Critical patent/EP0541172B1/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
    • 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
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • 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
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D2317/06—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 with forced air circulation
    • F25D2317/065—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 with forced air circulation characterised by the air return
    • F25D2317/0653—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 with forced air circulation characterised by the air return through the mullion
    • 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
    • F25D2317/06—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 with forced air circulation
    • F25D2317/067—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 with forced air circulation characterised by air ducts
    • 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
    • F25D2400/04—Refrigerators with a horizontal mullion
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

Definitions

  • the present invention relates to a no-frost plural-compartment refrigerator.
  • Current refrigerators for home use comprise normally at Least two compartments at different temperatures, one at higher temperature (typically +5°C) for fresh food, the other at lower temperature (typically -18°C) for frozen and deep-frozen food.
  • Each of the two compartments is provided with a respective evaporator, or with a respective portion of the same evaporator, that forms part of a usual refrigerating circuit provided with a compressor and a condenser.
  • US-A- 4 481 787, US-A-3 248 893 and US-A-3 248 894 disclose refrigerators as recited in the preamble of claim 1, in which forced air circulation is alternately limited to the compartment at lower temperature or to the compartment at higher temperature.
  • the object of the present invention is to provide a refrigerator with at least two compartments at different temperatures, wherein the absence of frost is obtained without any waste of energy and the desired degree of humidity is also assured in the compartment at higher temperature.
  • Fig.s 1-3 show a refrigerator with two compartments 1 and 2, at a lower and at a higher temperature, respectively, separated by a horizontal dividing wall 3 inside a common cabinet 4. Said compartments are normally closed by respective independent doors 5 and 6.
  • a evaporator 7 that forms part of a refrigerating circuit 8 shown in Fig. 1 and also comprising, in a manner known in itself, a compressor 9, a condenser 10, a dehydrating filter 11 and flow laminators 12.
  • a wall 13 that together with a parallel wall 14 defines a vertical channel 15 for the flow of air made to circulate by a fan 16 in a space 17 above the evaporator 7 and in communication with the upper extremity, always open, of the channel 15.
  • the lower end of the latter in a manner adjustable with a self-sensitive shutter 18, in turn communicates with a space 19 in the compartment 2 at higher temperature and in communication with it through drilled walls 20.
  • the upper space 17 also communicates, through an inlet that is opened and closed by a shutter 22, with a front space 24 that in turn communicates with the compartment 1 at lower temperature through a drilled wall 25.
  • Both the compartments 1 and 2 communicate with a space 26 at the lower end of the evaporator 7 through respective horizontal channels 27 and 28 obtained in the dividing wall 3. Said space 26 also communicates with the outside of the cabinet 4 through a channel 29 for the discharge of the evaporator's condensate water.
  • a sensor 30 is housed in the compartment 1 at lower temperature to read the temperature in said compartment and to communicate it to a thermostat 31 housed in the compartment 2 at higher temperature.
  • a suitable electrical circuit whose details are shown in Fig. 4. It comprises a pair of supply terminals 32 and 33, between which a motor 34 for the operation of the fan 16 is interposed. To the terminal 32 there is also connected the thermostat 31, that drives the parallel of the compressor 9 and of a relay 23 whose excitation causes the shutter 22 to open.
  • the sensor 30 keeps the thermostat 31 in the closed position, so that the compressor 9 is in operation and allows the evaporator 7 to withdraw heat from the environment where it is housed.
  • the relay 23 is excited and keeps the shutter 22 in the position wherein the inlet 21 is open, as shown in Fig.s 1 and 2.
  • the fan 16 is lastly in operation and determines a forced circulation of air (highlighted by the arrows of Fig. 1) along the evaporator 7 and in the two compartments 1 and 2, passing through the inlet 21, the space 24 and the horizontal return channel 27 and through the vertical channel 15 (with the lower extremity kept open by the self-sensitive shutter 18), the space 19 and the horizontal return channel 28, respectively.
  • Such circulation of air prevents the formation of frost.
  • the sensor 30 drives the opening of the electrical contacts of the thermostat 31 with the consequent stoppage of the compressor 9 and the disexcitation of the relay 23.
  • the refrigerating circuit 8 thus starts a defrosting stage and the shutter 22 closes the inlet 21, excluding the compartment 1 from the circulation of air, that through the vertical channel 15 and then through the horizontal return channel 28 flows through the compartment 2 only, as well as naturally through the evaporator 7, as shown in Fig. 3.
  • compartment 2 speeds up the defrosting process of the evaporator and at the same time it gains humidity, advantageously enhancing the relative humidity inside compartment 2.
  • the vertical channel 15 for introducing air in the lower compartment 2 may be incorporated in the rear wall of the cabinet 4 and extend from an upper inlet 41 communicating with the space 24 to a lower inlet 42 communicating with the compartment 2.
  • the return channel 28 can itself also be incorporated in the rear wall of the cabinet and extend from a lower inlet 43 to the space 26, where, through the holes 44 and 45, the return air from the compartment at lower temperature 1 also arrives.
  • Fig. 8 instead of just one compartment 2 at higher temperature, there can be two, as shown in Fig. 8, where they are indicated with 2' and 2'', respectively. In such case there are two admission inlets 42' and 42'' and two return outlets or channels 43' and 43''.
  • the evaporator 7 instead of on the rear wall of the compartment at the lower temperature 1, is in a space 51 obtained behind the rear wall of the high-temperature compartment 2.
  • Such space 51 communicates at the lower end with the compartment 2 through inlets 52 and at the upper end with a space 53 housing the fan 16.
  • Such space 53 in turn communicates, through an inlet 54 operated by the self-sensitive shutter 18, with a further space 55 in turn communicating with the compartment 2 through an inlet 56.
  • the same space 53 also communicates with a vertical channel 57, that through an inlet 58 opened and closed by the shutter 22 (Fig.s 12 and 14) communicates with a space 59 altogether similar to the space 24 of Fig. 1 and then through inlets 60 with the low-temperature compartment 1.
  • a pair of inlets 61, a vertical channel 62 incorporated in the rear wall of the cabinet 4 and an inlet 63 take back to the evaporator 7 the air thus introduced into compartment 1.
  • the fan 16 can be either upstream or downstream from the evaporator and the same can be said for the opening with the shutter 22 that regulates the flow of air in the low-temperature compartment.
  • the flow of air with the shutter 18 for one of the compartments at higher temperature should always be opened when the compressor is not in operation; for the other compartments at higher temperature, when they are present, such flow may be opened or closed in relation to the thermal and humidity features that are to obtain in the compartments themselves.
  • the fan 16 is generally always in operation, but its switching off may be provided for in the case where all compartments have reached sufficiently low temperatures.

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)
  • Defrosting Systems (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (5)

  1. Réfrigérateur comportant au moins deux compartiments (1, 2), dont l'un (1) est à une température relativement basse et l'autre (2) à une température relativement élevée, comprenant au moins un évaporateur (7) en position d'échange de chaleur avec le compartiment (1) à température relativement basse et introduit dans un circuit de réfrigération (8) qui comporte aussi un condenseur (10) et un compresseur (9) qui peuvent être déconnectés périodiquement lorsque la température dans le compartiment (1) à température relativement basse tombe au-dessous d'une valeur minimale préréglée, un ventilateur (16) destiné à assurer la circulation forcée de l'air dans l'évaporateur (7) et à l'intérieur des compartiments (1, 2), et un dispositif à soupapes (18, 22) disposé afin qu'il exclue le compartiment (1) à température relativement basse de la circulation forcée d'air lorsque le compresseur est désactivé, caractérisé en ce que le dispositif à soupapes (18, 22) est en outre destiné à permettre la circulation forcée de l'air simultanément dans les deux compartiments (1, 2) lorsque le compresseur est activé.
  2. Réfrigérateur selon la revendication 1, caractérisé en ce que l'évaporateur (7) est logé dans ledit compartiment (1) à température relativement basse.
  3. Réfrigérateur selon la revendication 1, caractérisé en ce que l'évaporateur (7) est logé dans l'espace (51) délimité par une paroi du compartiment (2) à température relativement élevée.
  4. Réfrigérateur selon la revendication 1, caractérisé en ce que le ventilateur (16) est logé dans un espace (17, 53) délimité à une première extrémité de l'évaporateur (7) dans la direction de circulation forcée de l'air et communiquant avec ledit compartiment (1) à température relativement basse par le dispositif à soupapes (22), ledit espace (17, 53) étant aussi en communication avec le compartiment (2) à température relativement élevée par l'intermédiaire d'orifices (15, 28 ; 54-56, 52) de sortie et de retour qui ne communiquent pas avec le compartiment (1) à température relativement basse.
  5. Réfrigérateur selon la revendication 1, caractérisé en ce qu'il comporte un dispositif thermostatique (31) qui réagit à un capteur thermique (30) logé dans le compartiment (1) à température relativement basse afin qu'il désactive le compresseur (9) et place le dispositif à soupapes (18, 22) en position de fermeture de la communication entre l'évaporateur (7) et le compartiment (1) à température relativement basse lorsque la température dans le compartiment (1) à température relativement basse tombe au-dessous d'une valeur minimale préréglée.
EP92203374A 1991-11-08 1992-11-04 Réfrigérateur à plusieurs compartiments sans formation de givre Expired - Lifetime EP0541172B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912985A IT1251989B (it) 1991-11-08 1991-11-08 Frigorifero a piu' scomparti senza formazione di brina
ITMI912985 1991-11-08

Publications (3)

Publication Number Publication Date
EP0541172A2 EP0541172A2 (fr) 1993-05-12
EP0541172A3 EP0541172A3 (fr) 1993-05-19
EP0541172B1 true EP0541172B1 (fr) 1996-06-26

Family

ID=11361061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92203374A Expired - Lifetime EP0541172B1 (fr) 1991-11-08 1992-11-04 Réfrigérateur à plusieurs compartiments sans formation de givre

Country Status (3)

Country Link
EP (1) EP0541172B1 (fr)
DE (1) DE69211813T2 (fr)
IT (1) IT1251989B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940009644A (ko) * 1992-10-09 1994-05-20 배순훈 냉장고의 온도조절 방법 및 장치
BR9403434A (pt) * 1993-09-04 1995-05-09 Daewoo Electronics Co Ltd Sistema para reduzir a formação de geada em um refrigerador
MY122559A (en) * 1994-04-04 2006-04-29 Samsung Electronics Co Ltd Refrigerator.
IT1286409B1 (it) * 1996-11-27 1998-07-08 Candy Spa Struttura frigorifera con ventilazione forzata variabile
WO2002016843A1 (fr) * 2000-08-23 2002-02-28 Bpl Refrigeration Limited Refrigerateur sans givre pourvu d'un systeme permettant de convertir le compartiment congelateur en compartiment pour aliments frais
BR0202820B1 (pt) * 2002-07-04 2010-12-14 sistema de distribuiÇço de ar para refrigeradores combinados.
GB2496949A (en) * 2011-10-19 2013-05-29 Thermo Fisher Scient Asheville Refrigerator having an interior with dampers separating two evaporator compartments from a refrigerated compartment
US9285153B2 (en) 2011-10-19 2016-03-15 Thermo Fisher Scientific (Asheville) Llc High performance refrigerator having passive sublimation defrost of evaporator
DE102012020106A1 (de) * 2011-10-19 2013-04-25 Thermo Fisher Scientific (Asheville) LLC (n. d. Ges. d. Staates Delaware) HOCHLEISTUNGSKÜHLGERÄT MIT VERDAMPFER AUßERHALB DES SCHRANKS
US9310121B2 (en) 2011-10-19 2016-04-12 Thermo Fisher Scientific (Asheville) Llc High performance refrigerator having sacrificial evaporator
GB2496948B (en) * 2011-10-19 2014-10-15 Thermo Fisher Scient Asheville High performance refrigerator having insulated evaporator cover
CN106766538B (zh) * 2017-03-13 2023-04-21 广东维诺电器有限公司 一种同步循环的双温区酒柜或冷柜

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248893A (en) * 1965-02-08 1966-05-03 Westinghouse Electric Corp Refrigeration apparatus
US3248894A (en) * 1965-02-08 1966-05-03 Westinghouse Electric Corp Refrigeration apparatus
US4481787A (en) * 1982-07-16 1984-11-13 Whirlpool Corporation Sequentially controlled single evaporator refrigerator

Also Published As

Publication number Publication date
IT1251989B (it) 1995-05-27
EP0541172A2 (fr) 1993-05-12
ITMI912985A1 (it) 1993-05-08
ITMI912985A0 (it) 1991-11-08
DE69211813T2 (de) 1996-11-07
DE69211813D1 (de) 1996-08-01
EP0541172A3 (fr) 1993-05-19

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