EP3171105A1 - Appareil de réfrigeration comprenant plusieurs zones de températures - Google Patents

Appareil de réfrigeration comprenant plusieurs zones de températures Download PDF

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Publication number
EP3171105A1
EP3171105A1 EP16002276.0A EP16002276A EP3171105A1 EP 3171105 A1 EP3171105 A1 EP 3171105A1 EP 16002276 A EP16002276 A EP 16002276A EP 3171105 A1 EP3171105 A1 EP 3171105A1
Authority
EP
European Patent Office
Prior art keywords
temperature
air
flow velocity
controller
cooling module
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
EP16002276.0A
Other languages
German (de)
English (en)
Other versions
EP3171105B1 (fr
Inventor
Jochen Ganz
Adrian Hermann Bachmann
Emanuele Diana
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.)
V-Zug AG
Original Assignee
V-Zug AG
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Publication date
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Publication of EP3171105A1 publication Critical patent/EP3171105A1/fr
Application granted granted Critical
Publication of EP3171105B1 publication Critical patent/EP3171105B1/fr
Active 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
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • F25D2317/0655—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 top
    • 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
    • F25D2317/066—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 supply
    • F25D2317/0661—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 supply from the bottom
    • 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
    • F25D2500/04—Calculation of parameters
    • 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
    • F25D2700/123—Sensors measuring the inside temperature more than one sensor measuring the inside temperature in a compartment

Definitions

  • the invention relates to a refrigerator, in particular a refrigerator or a freezer, according to the preamble of claim 1, and a method for operating such a refrigerator.
  • a cooling device in particular of a refrigerator, into a plurality of temperature zones, for example into a lower temperature zone and an upper temperature zone.
  • different setpoint temperatures are specified, e.g. 0-2 ° C for the lower temperature zone and 4-6 ° C for the upper temperature zone.
  • articles may be stored which should be kept relatively cool, e.g. Meat while in the upper temperature zone items are stored, which should not be kept as cold as e.g. Cheese.
  • cooling air is circulated between a cooling module and work space. If two temperature zones with different temperature are to be realized in such devices, separate air supply into the individual zones or additional, individually controllable coolant are required.
  • the invention is based on the finding that the temperatures in the two temperature zones can be set independently of one another within wide ranges by a suitable choice of the two variables mentioned. This will be described in more detail below.
  • the invention also relates to a method for operating such a cooling device, in which the instantaneous temperatures in the lower and upper temperature zones are measured and, depending on the deviation of the instantaneous temperatures from desired values, the flow velocity as well as the temperature of the cooling module are selected.
  • the device according to Fig. 1 has a working space 1, which is at least mentally divided into a lower temperature zone 2 and an upper temperature zone 3, wherein the lower temperature zone 2 is arranged lower than the upper temperature zone 3.
  • the utility room 1 is completed by a door 4.
  • the work space 1 is advantageously air-permeable in the vertical direction, i. that cooling air can rise through the working space 1 from the lower end of the working space to the upper end of the working space.
  • the two temperature zones 2 and 3 can be separated from each other by a partition plate 5, which has at least one air passage opening.
  • a partition plate 5 reduces the temperature exchange between the two temperature zones due to diffusion and radiation, but still allows the flow of air from the bottom to the top.
  • the device according to Fig. 1 further comprises a heat pump comprising a compressor 6, a condenser 7, an evaporator 8 and a throttle (not shown) between the condenser 7 and the evaporator 8.
  • a heat pump comprising a compressor 6, a condenser 7, an evaporator 8 and a throttle (not shown) between the condenser 7 and the evaporator 8.
  • the evaporator 8 is cooled and the condenser 7 is heated.
  • air conveying means comprise an air outlet 10 at the upper end of the work space 1, a connecting duct 11, a fan 12 and an air inlet 13 at the lower end of the work space 1.
  • the air outlet 10 at the upper end of the work space 1 consists in the present embodiment of several openings on the ceiling of the work space, which connect the work space with the connecting channel 11.
  • the air inlet 13 is similarly formed by a plurality of openings at the bottom of the work space.
  • the openings of the air outlet 13 and of the air inlet 10 can also be arranged, for example, in the region of the edges of the ceiling or of the floor of the work space 1, possibly behind suitable diaphragms.
  • the delivery rate of the fan 12, i. the flow velocity of the air in the work space 1, is advantageously dimensioned so that the work space 1 is laminar flows through with air, i. it comes when flowing through the usable space 1 is not a swirling of the air.
  • the heat thus generated by the system is dissipated via the condenser 7, which is cooled, for example, with ambient air (not shown).
  • a controller 14 For controlling the components of the device, a controller 14 is provided. This has the required hardware and software components to control the system in the manner described below.
  • the controller 14 preferably has a memory in which setpoint temperatures for the upper and lower temperature zones 3 and 2 are stored. These target temperatures are advantageously between 0 and 10 ° C, the target temperature for the lower temperature zone is lower than for the upper temperature zone, in particular by at least 1 ° C.
  • the controller 14 may further include input means (not shown) that allow the user to specify one or both of these setpoint temperatures, in which case the controller 14 should ensure that the setpoint temperature for the lower temperature zone is lower than for the upper temperature zone , again in particular at least 1 ° C.
  • Fig. 1 two temperature sensors 17 and 18 shown.
  • the first temperature sensor is located at a height x1 in the lower temperature zone 2 and the second temperature sensor 18 is located at a height x2 in the upper temperature zone 3.
  • the air cooled by the evaporator 8 flows through the utility space 1 from bottom to top in the direction x, it heats up. In the equilibrium state of the device, the heating is due to the fact that the air is heated on the side walls of the work space, since the insulation of the work space is not ideal.
  • T (x) T 0 - U ⁇ exp - k ⁇ x / v + U
  • T0 denotes the temperature at the lower end of the working space
  • U the ambient temperature
  • k a constant proportional to the thermal conductivity of the side walls
  • v the flow velocity of the air in the working space 1.
  • the temperature T0 is referred to below as the initial temperature, and it is equated for the sake of simplicity of the temperature of the evaporator 8 or cooling module.
  • Fig. 2 shows the course of the temperature T in the work space 1 as a function of the height position x.
  • the curve 20 shows the temperature profile for a given initial temperature T0 and a certain flow velocity v.
  • Fig. 2 illustrates that by suitably selecting the parameters T0 and v, the temperatures T1 and T2 in the lower temperature zone 2 and the upper temperature zone 3 at the locations x1 and x2 can be selected substantially independently of each other by the initial temperature T0 and the flow velocity v suitable be set.
  • Fig. 3 illustrates, at the current flow rate v 'and initial temperature T0', the temperature T2 in the upper temperature zone 3 is correct, but the temperature T1 'in the lower temperature zone 2 is too low, the controller 14 raises the temperature of the evaporator 8 to a higher value T0> T0 ', and it also increases the flow rate to a somewhat higher value v'> v, causing the temperature profile curve to start at a higher T0 but increase less rapidly.
  • Equation 1 represents a very simple model which the controller 14 can use for the calculation of the temperature profile in the work space 1 as a function of the flow velocity v and the initial temperature T0.
  • the thermal conductivity k in Equation 1 can be e.g. be fixed at the manufacturer, while the second parameter, the ambient temperature U, either directly measured with a suitable temperature sensor or can be estimated based on the current temperatures T1 and T2 at a known flow rate v and initial temperature T0.
  • the controller 14 may also use a more complex thermal model of the workspace, taking into account, for example, in addition the thermal masses and instantaneous temperatures of the product to be stored in the lower and upper temperature zones as model parameters, and / or also the temperature-varying density of the Air.
  • the thermal masses and instantaneous temperatures enter the model as a priori unknown parameters. However, they can be measured by measuring the temperatures at locations x1 and x2 as a function of time, the flow velocity v and the initial temperature T0 from the controller 14 in operation is estimated by means of compensation calculation (ie "curve fitting") and then used for an improved control of the device.
  • the controller 14 may thus be configured to use a mathematical model of the thermal properties of the work space 1 described by parameters for selecting the flow velocity v and the initial temperature T0.
  • the parameters of the model may be e.g. to be the above-mentioned values of k and / or U and / or the thermal mass and / or instantaneous temperature of the loads and / or the air in the temperature zones.
  • the controller 14 is configured to measure at least one, preferably a plurality of temperatures as a function of time, the flow velocity v and the initial temperature T0 in the working space, thereby determining the parameters of the model.
  • the controller can estimate the effect of changes in the flow velocity v and the initial temperature T on the temperature distribution in the work space 1, which allows it to more precisely control the temperatures in the two temperature zones.

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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)
EP16002276.0A 2015-11-09 2016-10-25 Appareil de réfrigeration comprenant plusieurs zones de températures Active EP3171105B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01627/15A CH709751B1 (de) 2015-11-09 2015-11-09 Kühlgerät mit einem Nutzraum mit mehreren Temperaturzonen.

Publications (2)

Publication Number Publication Date
EP3171105A1 true EP3171105A1 (fr) 2017-05-24
EP3171105B1 EP3171105B1 (fr) 2019-03-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16002276.0A Active EP3171105B1 (fr) 2015-11-09 2016-10-25 Appareil de réfrigeration comprenant plusieurs zones de températures

Country Status (4)

Country Link
EP (1) EP3171105B1 (fr)
CN (1) CN106679272B (fr)
AU (1) AU2016250363A1 (fr)
CH (1) CH709751B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110425804A (zh) * 2019-08-28 2019-11-08 长虹美菱股份有限公司 一种风循环冷暖储藏柜及其控制方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3477234A1 (fr) * 2017-10-24 2019-05-01 Liebherr-Hausgeräte Lienz GmbH Appareil à température régulée
CH715229A1 (de) * 2018-08-02 2020-02-14 V Zug Ag Kühlgerät mit mehreren Temperaturzonen.
CN216114852U (zh) * 2021-07-28 2022-03-22 青岛海尔电冰箱有限公司 一种制冷储物柜

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716278A1 (fr) * 1994-12-10 1996-06-12 Samsung Electronics Co., Ltd. Réfrigérateur et son procédé de régulation de température
US20090188262A1 (en) * 2008-01-30 2009-07-30 Libeherr-Hausgeraete Ochsenhausen Gmbh Method of Operating a Refrigerator Unit and/or Freezer Unit as well as a Refrigerator Unit and/or Freezer Unit Operated Using Such a Method
EP2607822A2 (fr) * 2011-12-23 2013-06-26 LG Electronics, Inc. Réfrigérateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29603848U1 (de) * 1996-03-01 1997-05-28 Liebherr Hausgeraete Kühlschrank mit einem Kühlfach und einem Kaltlagerfach
JP3068809B2 (ja) * 1997-11-29 2000-07-24 三星電子株式会社 冷気吐出速度を加速化し得る冷蔵庫
CN100347497C (zh) * 2002-12-08 2007-11-07 海尔集团公司 三循环制冷系统电冰箱
FR2924488A1 (fr) * 2007-11-29 2009-06-05 Eurocave Sa Sa Unite de refroidissement a froid positif et dispositifs mettant en oeuvre une telle unite
DE202008004543U1 (de) * 2008-02-26 2009-07-09 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät
DE102010055726A1 (de) * 2010-10-21 2012-04-26 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716278A1 (fr) * 1994-12-10 1996-06-12 Samsung Electronics Co., Ltd. Réfrigérateur et son procédé de régulation de température
US20090188262A1 (en) * 2008-01-30 2009-07-30 Libeherr-Hausgeraete Ochsenhausen Gmbh Method of Operating a Refrigerator Unit and/or Freezer Unit as well as a Refrigerator Unit and/or Freezer Unit Operated Using Such a Method
EP2607822A2 (fr) * 2011-12-23 2013-06-26 LG Electronics, Inc. Réfrigérateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110425804A (zh) * 2019-08-28 2019-11-08 长虹美菱股份有限公司 一种风循环冷暖储藏柜及其控制方法

Also Published As

Publication number Publication date
CN106679272B (zh) 2020-09-04
CN106679272A (zh) 2017-05-17
CH709751A3 (de) 2016-03-15
EP3171105B1 (fr) 2019-03-20
CH709751B1 (de) 2019-06-28
CH709751A2 (de) 2015-12-31
AU2016250363A1 (en) 2017-05-25

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