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WO2012089454A2 - Dispositif de refroidissement comprenant un contenant de récupération - Google Patents

Dispositif de refroidissement comprenant un contenant de récupération Download PDF

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Publication number
WO2012089454A2
WO2012089454A2 PCT/EP2011/071922 EP2011071922W WO2012089454A2 WO 2012089454 A2 WO2012089454 A2 WO 2012089454A2 EP 2011071922 W EP2011071922 W EP 2011071922W WO 2012089454 A2 WO2012089454 A2 WO 2012089454A2
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
cut
temperature
evaporator
producer
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.)
Ceased
Application number
PCT/EP2011/071922
Other languages
English (en)
Other versions
WO2012089454A3 (fr
Inventor
Erhan Kacmaz
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Priority to EP11790796.4A priority Critical patent/EP2659204A2/fr
Publication of WO2012089454A2 publication Critical patent/WO2012089454A2/fr
Publication of WO2012089454A3 publication Critical patent/WO2012089454A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/006—Defroster control with electronic control circuits
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D2600/00—Control issues
    • F25D2600/02—Timing
    • 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
    • F25D2700/10—Sensors measuring the temperature of the evaporator
    • 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

Definitions

  • the present invention relates to a cooling device comprising a collection container wherein the frost formed as a result of defrost is collected.
  • frost is formed on the evaporator during utilization in the course of time. Frosting causes the refrigeration performance to decrease and frost to fall on the items at the lowermost part of the refrigeration cabin.
  • the frost on the evaporator is provided to fall by performing the defrost operation at certain intervals in order to eliminate this adverse effect.
  • the heater is operated during the defrost operation and the frost on the evaporator melts and flows into the drip container situated just beneath the evaporator.
  • a second heater is used for the aim of evaporating the water collected in the drip container.
  • the heaters that are continuously operated during the defrost operation not only increase energy consumption directly but also cause the compressor to operate much more by increasing the thermal load of the refrigeration cabin. In order to solve this problem, various methods are used for the aim of regulating the utilization of the heater.
  • the cooling device described in the state of the art Japanese Patent Application No. JP7141557 comprises a defrosting heater and a drain heater that provides the evaporation of water in the drip container.
  • the control of these heaters is performed by measuring the level of water in the drip container. If the water level is less than a certain value, it is decided that icing occurred.
  • a cooling device is described the temperature of the evaporator of which is measured.
  • activation and de-activation of the defrost heater is performed when the temperature of the evaporator reaches predetermined values.
  • a cooling device that comprises a control unit which decides for the defrosting operation according to the compressor run time and calculates the time of the defrosting operation.
  • the aim of the present invention is the realization of a cooling device wherein the defrost operation is performed effectively and the heater utilization time is decreased.
  • the cooling device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a collection container wherein the frost on the evaporator falls, a heater that provides heating of the collection container and the evaporator and a control unit which controls the operation thereof.
  • the heater is not operated continuously during the defrost cycle and a delay time, predetermined by the producer, is given when the compressor cut-in requirement is realized due to the temperature of the cabin. Since the frost on the evaporator would not be cleared entirely if the heater is not operated when the cooling device performs the compressor cut-in requirement generally due to the cabin interior temperature, the frost is provided to be removed entirely and accumulated in the collection container during this delay time.
  • control unit decides that the frost on the evaporator has melted entirely and operates the heater at the end of the delay time.
  • the purpose for operating the heater is to melt and liquefy the frost accumulated in the collection container.
  • the cooling device comprises an evaporator temperature sensor disposed on the evaporator and that measures the temperature of the evaporator.
  • the temperature measured by the evaporator temperature sensor is controlled during the defrost and when this temperature reaches the temperature predetermined by the producer indicating that the frost on the evaporator has melted, the heater is operated without waiting for the delay time to end.
  • the temperature that indicates the frost has melted is generally around 4 0 C.
  • the heater at whatever condition it is cut in, is operated for a heater operation time predetermined by the producer. This duration is determined to be sufficient for the frost collected in the collection container to melt. At the end of this duration, the heater is turned off and the compressor is operated. Thus, the defrost cycle is completed and the normal cycle starts.
  • the compressor cut-out number is used as the defrost starting condition.
  • the compressor cut-out number is increased by one in the memory of the control unit.
  • the compressor cut-out number reaches a number predetermined by the producer, the defrost cycle is started and the counter is reset.
  • the compressor cut-out number predetermined by the producer, starting the defrost cycle when reached is three. Accordingly, the control unit decides that the evaporator is frosted at every three cycles of the compressor and starts the defrost cycle.
  • the control unit starts the defrost cycle when the obligatory defrost condition is fulfilled even if the defrost condition according to the compressor cut-out number is not yet fulfilled.
  • the obligatory defrost condition is determined according to the compressor operation time.
  • the control unit cuts out the compressor and starts the defrost cycle when the time elapsed beginning from the compressor cut-in time reaches a compressor threshold time predetermined by the producer.
  • the compressor threshold time is determined as 270 minutes. The compressor is stopped and the defrost cycle starts when the run time thereof reaches 270 minutes even if the compressor is still performing the first or the second cycle. In the meantime, the compressor cut-out number is also reset.
  • the heater is disposed at the underside of the tail type evaporator.
  • the evaporator is disposed between the rear wall and the exterior body of the cooling device.
  • the evaporator causes frosting on the rear wall whereto it is adjacent.
  • the collection container, wherein this frost falls, is located at the level where the evaporator ends but on the inner surface of the rear wall.
  • the heater disposed on the evaporator effectively heats the collection container situated on the other face of the rear wall. If there is still frost left on the evaporator, it is provided to fall into the collection container since the evaporator is also heated at the same time.
  • a hole is arranged at the base of the collection container.
  • the frost in the collection container becomes liquefied and flows from the hole after the heater is operated.
  • the base of the collection container is produced to be inclined towards the hole.
  • all of the liquid on the base is provided to be discharged.
  • the liquid draining from the hole is collected in the evaporation container situated between the rear wall and the exterior body of the cooling device. Since the evaporation container is also right under the evaporator, some portion of the frost on the evaporator directly falls into the evaporation container.
  • the evaporation container is disposed on the periphery of the compressor so as to take advantage of the residual heat generated by the compressor.
  • the cooling device comprises more than one cabin, at least one evaporator disposed in each of these cabins, at least one collection container in each cabin, at least one heater around each collection container, at least one valve providing to determine to which evaporator the refrigerant compressed by the compressor will be directed and a control unit that controls the operation of the compressor and the heaters.
  • the cooling device is a refrigerator having a freezer cabin and a fresh food cabin.
  • the frost is provided to be collected in a collection container without using the heater and the heater is used for the aim of only melting the collected frost.
  • the heater is used for a shorter time period and the total energy consumption of the cooling device is decreased.
  • Figure 1 – is the schematic view of a cooling device.
  • Figure 2 — is the schematic view of another embodiment of the present invention.
  • Figure 3 – is the flow chart of a cooling device control method embodiment.
  • the cooling device (1) comprises at least one cabin (2) wherein the items to be cooled are placed, a compressor (3) that circulates the refrigerant fluid in the refrigeration cycle by compressing, at least one evaporator (4) providing the interior volume of the cabin (2) to be cooled by absorbing the thermal energy, a cabin temperature sensor (6) that measures the temperature in the interior of the cabin (2), at least one collection container (7) wherein the frost accumulated around the evaporator (4) falls, at least one heater (8) providing the frost falling into the collection container (7) to be melted by heating and a control unit (9)
  • the control unit (9) delays the cut-in of the compressor (3) by a delay time predetermined by the producer (t delay ) when the temperature detected by the cabin temperature sensor (6) (T R ) reaches the compressor (3) cut-in temperature (T Rcut-in ) during the defrost cycle.
  • the control unit (9) starts the defrost cycle upon deciding that frosting has occurred on the evaporator (4), as the compressor (3) is cut-out, but the heater (8) is not operated during this time.
  • the temperature inside the cabin (2) rises as the compressor (3) is cut-out and the frosting on the evaporator (4) starts to thaw in the course of time.
  • the control unit (9) delays the cut-in of the compressor (3) as long as a delay time predetermined by the producer (t delay ) since the removal of frosting on the evaporator (4) may not be completed. Accordingly, the removal of frosting on the evaporator (4) and accumulation on the collection container (7) are guaranteed.
  • the control unit (9) cuts in the heater (8) at the end of the delay time predetermined by the producer (t delay ).
  • the frost around the evaporator (4) is entirely removed at the end of the delay time (t delay ) predetermined by the producer and is collected inside the collection container (7).
  • the frost in the collection container (7) is provided to melt by means of the heater (8) being operated in the meantime.
  • the compressor (3) is not yet cut in while the heater (8) operates.
  • the cooling device (1) comprises an evaporator temperature sensor (5) that measures the temperature on the surface of the evaporator (4).
  • the control unit (9) compares the temperature detected by the evaporator temperature sensor (5) (T EVA ) with the threshold temperature predetermined by the producer (T threshold ), whereat the frost around the evaporator (4) is removed and cuts in the heater (8) without waiting for the delay time predetermined by the producer (t delay ) to end when the temperature detected by the evaporator temperature sensor (5) (T EVA ) reaches the threshold temperature predetermined by the producer (T threshold ), whereat the frost around the evaporator (4) is removed within the delay time predetermined by the producer (t delay ).
  • the data about the frost around the evaporator (4) being entirely melted is received by means of the evaporator temperature sensor (5) disposed on the evaporator (4) and the heater (8) is operated without waiting until the end of the delay time predetermined by the producer (t delay ).
  • the temperature of the cabin (2) interior is provided to decrease by a lesser amount.
  • the control unit (9) cuts out the heater (8) at the end of a heater (8) operation time predetermined by the producer (t heat ) and cuts in the compressor (3).
  • the heater (8) that is cut in in the last phase of the defrost cycle is operated as long as a heater (8) operation time predetermined by the producer (t heat ), melting the frost collected in the collection container (7) and the heater (8) is cut out at the end of this time.
  • the defrost cycle ends as the compressor (3) is cut in simultaneously.
  • the cut-out number of the compressor (3) (n cut-out ) is recorded in the memory of the control unit (9).
  • the control unit (9) increases the cut-out number of the compressor (3) (n cut-out ) recorded in memory by one each time the compressor (3) is cut out and when the compressor (3) cut-out number (n cut-out ) reaches a compressor (3) cut-out number predetermined by the producer (N cut-out ), starts the defrost cycle and resets the compressor (3) cut-out number (n cut-out ) recorded in the memory thereof.
  • the compressor (3) cut-out number predetermined by the producer (N cut-out ) is three.
  • the control unit (9) decides that frosting has occurred on the evaporator (4) after the compressor (3) is operated three times and stopped. As the defrost cycle starts the compressor (3) cut-out number (n cut-out ) recorded in the memory of the control unit (9) is reset.
  • the control unit (9) starts the defrost cycle if the operation time ( t comp ) that starts with the cut-in of the compressor (3) exceeds a compressor (3) threshold time predetermined by the producer (t threshold ).
  • the compressor (3) is operated continuously in order to keep the cabin (2) temperature within the desired interval if the door of the cooling device (1) is kept open for a long time or is forgotten in the open position by the user. This causes frosting to be formed on the evaporator (4) after some time.
  • the cooling device (1) enters the obligatory defrost cycle when the operation time (t comp ) that starts with the cut-in of the compressor (3) reaches a compressor (3) threshold time predetermined by the producer (t threshold ). In this embodiment, preferably 270 minutes is selected as the compressor (3) threshold time (t threshold ).
  • the heater (8) is positioned so as to heat both the evaporator (4) and the collection container (7).
  • the tail-type evaporator (4) is used and the heater (8) is disposed on the evaporator (4).
  • the evaporator (4) is disposed behind the rear wall of the cooling device (1) and the collection container (7) is disposed at the front side of the rear wall.
  • the heater (8) heats both the evaporator (4) and the collection container (7) since it is located at the lowermost portion of the evaporator (4) and aligned with the collection container (7). Consequently, not only the frost remaining on the evaporator (4) falls into the collection container (7) but also the frost fallen into the collection container (7) is melted and liquefied.
  • the cooling device (1) comprises a hole (10) disposed on the base of the collection container (7), providing the water formed after the ice therein melts to be discharged and an evaporation container (11) wherein the water discharged from the hole (10) is collected. After the frost collected in the collection container (7) is melted by means of the heater (8), it flows through the hole (10) located on the base of the collection container (7). The other end of the hole (10) reaches the evaporation container (11).
  • the evaporation container (11) is disposed on the periphery of the compressor (3) so as to take advantage of the residual heat generated by the compressor (3). Thus, it is not required to use an additional heater for evaporating the liquid in the evaporation container (11) and less energy is consumed.
  • the cooling device (1) comprises more than one cabin (2), at least one evaporator (4) disposed in each one of these cabins (2), at least one collection container (7) in each cabin (2), at least one heater (8) around each collection container (7), at least one valve (12) that provides to determine to which evaporator (4) the refrigerant pumped from the compressor (3) will be directed and a control unit (9) that controls the operation of the compressor (3) and the heaters (8) ( Figure 2).
  • the operation of the heater (8) and the compressor (3) is controlled in the following manner:
  • the frost in the collection container (7) is melted effectively and directed to the evaporation container (11). Consequently, the frost in the collection container (7) is prevented from overspilling into the cabin (2). Furthermore, unnecessary utilization of the heater (8) is prevented and energy savings is provided by decreasing the total utilization time.

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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)
  • Defrosting Systems (AREA)

Abstract

La présente invention concerne un dispositif de refroidissement (1) qui comporte au moins une carrosserie (2) dans laquelle les articles à refroidir sont placés, un compresseur (3) qui fait circuler le fluide frigorigène dans le cycle de réfrigération par compression, au moins un évaporateur (4) qui permet au volume intérieur de la cabine (2) d'être refroidi par absorption de l'énergie thermique, un capteur de température de cabine (6) qui mesure la température de l'intérieur de la cabine (2), au moins un contenant de récupération (7) dans lequel l'eau gelée accumulée autour de l'évaporateur (4) tombe, au moins un élément chauffant (8) qui permet à l'eau gelée tombant dans le contenant de récupération(7) de fondre par chauffage et une unité de commande (9) qui commande le fonctionnement du compresseur (3) et des éléments chauffants (8), une consommation d'énergie plus faible étant obtenue dans le cycle de décongélation.
PCT/EP2011/071922 2010-12-27 2011-12-06 Dispositif de refroidissement comprenant un contenant de récupération Ceased WO2012089454A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11790796.4A EP2659204A2 (fr) 2010-12-27 2011-12-06 Dispositif de refroidissement comprenant une unité de commande du refroidissement et du dégivrage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201010965 2010-12-27
TRA2010/10965 2010-12-27

Publications (2)

Publication Number Publication Date
WO2012089454A2 true WO2012089454A2 (fr) 2012-07-05
WO2012089454A3 WO2012089454A3 (fr) 2012-11-15

Family

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Application Number Title Priority Date Filing Date
PCT/EP2011/071922 Ceased WO2012089454A2 (fr) 2010-12-27 2011-12-06 Dispositif de refroidissement comprenant un contenant de récupération

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EP (1) EP2659204A2 (fr)
WO (1) WO2012089454A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020093039A3 (fr) * 2018-11-04 2020-06-11 Elemental Machines, Inc. Procédé et appareil permettant de déterminer l'état d'un congélateur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07141557A (ja) 1993-11-18 1995-06-02 Fuji Electric Co Ltd 冷凍自動販売機のドレンヒータ制御装置
US5493867A (en) 1992-11-18 1996-02-27 Whirlpool Corporation Fuzzy logic adaptive defrost control
KR20010055666A (ko) 1999-12-11 2001-07-04 윤종용 냉장고의 증발기 제상 제어방법
US20030140639A1 (en) 2002-01-31 2003-07-31 Steven Gray Adaptive refrigerator defrost method and apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4327556A (en) * 1980-05-08 1982-05-04 General Electric Company Fail-safe electronically controlled defrost system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493867A (en) 1992-11-18 1996-02-27 Whirlpool Corporation Fuzzy logic adaptive defrost control
JPH07141557A (ja) 1993-11-18 1995-06-02 Fuji Electric Co Ltd 冷凍自動販売機のドレンヒータ制御装置
KR20010055666A (ko) 1999-12-11 2001-07-04 윤종용 냉장고의 증발기 제상 제어방법
US20030140639A1 (en) 2002-01-31 2003-07-31 Steven Gray Adaptive refrigerator defrost method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020093039A3 (fr) * 2018-11-04 2020-06-11 Elemental Machines, Inc. Procédé et appareil permettant de déterminer l'état d'un congélateur
US11561037B2 (en) 2018-11-04 2023-01-24 Elemental Machines, Inc. Method and apparatus for determining freezer status
US12449183B2 (en) 2018-11-04 2025-10-21 Elemental Machines, Inc. Method and apparatus for determining freezer status

Also Published As

Publication number Publication date
EP2659204A2 (fr) 2013-11-06
WO2012089454A3 (fr) 2012-11-15

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