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WO2012059332A2 - Appareil de froid pourvu d'un réservoir tampon - Google Patents

Appareil de froid pourvu d'un réservoir tampon Download PDF

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Publication number
WO2012059332A2
WO2012059332A2 PCT/EP2011/068341 EP2011068341W WO2012059332A2 WO 2012059332 A2 WO2012059332 A2 WO 2012059332A2 EP 2011068341 W EP2011068341 W EP 2011068341W WO 2012059332 A2 WO2012059332 A2 WO 2012059332A2
Authority
WO
WIPO (PCT)
Prior art keywords
storage chamber
refrigerating appliance
appliance according
storage
buffer memory
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/EP2011/068341
Other languages
German (de)
English (en)
Other versions
WO2012059332A3 (fr
Inventor
Juan Antonio Calvillo
Irene Dumkow
Bernd Heger
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens 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
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of WO2012059332A2 publication Critical patent/WO2012059332A2/fr
Publication of WO2012059332A3 publication Critical patent/WO2012059332A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature

Definitions

  • the present invention relates to a refrigerator, in particular a household refrigerator, with a chiller, cooled by the chiller, a storage fluid-containing buffer storage, a storage chamber for the storage of refrigerated goods and means for circulating the storage fluid between the buffer memory and the
  • Such a refrigerator is known from US-A-4 800 729.
  • Refrigeration device in which the chiller directly cools the storage chamber can be reduced. This reduction is the stronger, the larger the amount of storage fluid in the buffer memory. However, a large buffer occupies space that is no longer available for the storage chamber. The achievable through the use of the buffer memory improvement in the efficiency of the refrigerator is therefore at the expense of efficient use of space.
  • the object of the present invention is to remedy this disadvantage.
  • the object is achieved by providing at least one phase change material which is in thermal contact with the buffer memory.
  • the latent heat that such a phase change material is capable of absorbing at a phase transition is many times greater than that required to heat the phase change material or storage fluid by 1 ° C
  • phase change material allows to store a large amount of heat on a small volume.
  • the buffer memory and the phase change material are housed in a common insulating container. Because the use of the buffer memory and the phase change material
  • Phase change material allows the dimensions of this insulated container to small can hold a highly efficient vacuum insulation can be used at a reasonable cost.
  • a first temperature sensor for controlling the operation of the refrigerator on the buffer memory and a second temperature sensor for controlling the operation of the means for circulating the storage fluid between the
  • Puffpeicher and the first storage chamber attached to the first storage chamber.
  • Temperature sensor preferably a larger switching hysteresis than the second
  • the switching hysteresis of the second temperature sensor can be very low, for example, at 1 ° Celsius or below, are used to keep temperature gradients within the storage chamber as low as possible. It may be expedient to predetermine a setpoint temperature which varies with the time of day for the buffer memory. By setting them at lower times of the day when the demand for electric power is low than at times of high demand, the load on the public power grid can be made uniform over the course of the day, and a user of the refrigerator can benefit from different electricity rates depending on the time of day.
  • the refrigeration device may further comprise a second storage chamber.
  • Means for circulating the storage fluid between the buffer storage and the second storage chamber should be operable independently of the first means for circulating to allow cooling of the storage chambers independently of each other.
  • Storage chamber has, it is expedient if an outlet leading to the second storage chamber is arranged higher on the buffer storage than an outlet leading to the first storage chamber and / or an inlet coming from the second storage chamber is arranged higher on the storage tank than an inlet coming from the first storage chamber.
  • This makes it possible to have a temperature stratification that occurs during the Operation of the means for circulating in the buffer results in exploiting and still supply the first storage chamber with cold storage fluid when a part of the storage fluid is already warmer than the first storage chamber and consequently is no longer useful for their cooling.
  • the second storage chamber is usually supplied as a result of the above-described arrangement of the inlets and outlets with warmer storage fluid than the first storage chamber, which in turn contributes to the
  • At least a first temperature sensor can be arranged between each pair of inlets and outlets of the buffer memory. If several first temperature sensors are present, in the simplest case, the chiller can always be turned on when at least one of these first temperature sensor signals refrigeration demand.
  • Temperature sensor can be arranged both between the first storage chamber associated inputs and outlets and between the second storage chamber associated inputs and outlets, so that this single first temperature sensor is sufficient to control the operation of the chiller.
  • the refrigerator While in a refrigerator without buffer memory, the refrigerator must be generously dimensioned in order to meet the cooling demand of the storage chamber (s) even in times of high heat input, the chiller of the
  • Refrigeration device be designed significantly lower performance, since peaks of the cooling demand of the storage chamber (s) can be buffered by the buffer memory.
  • the cooling capacity of the chiller is therefore preferably not greater than twice the average heat input into the refrigerator, that is, it is sufficient if the refrigerator is running on average twelve hours per day to the cooling needs of Cover storage chamber (s).
  • the cooling capacity of the chiller is even lower, for example, 1, 5 times the average heat input, or even less.
  • Such a low-power chiller in addition to lower costs, has the advantage of smaller dimensions, so that the ratio between the total volume of the refrigerator and the volume of the storage chamber (s) can be improved.
  • phase change material should - depending on the cooling capacity of the chiller and the constant heat input into the refrigerator - be sufficiently dimensioned so that the complete freezing of the phase change material operating time of the chiller of several hours is required. If the
  • this period of time is the minimum running time with which the chiller under normal
  • the chiller and the buffer store at least one of the at least one
  • Refrigeration appliances in which a module containing a compressor and a condenser is deposited from a storage chamber are known per se, but these conventional refrigerators have the disadvantage that running between the storage chamber and the remote module
  • Refrigerant lines are sensitive to damage and difficult to subsequently seal when installing the refrigerator at its intended location.
  • the storage fluid under low pressure between the buffer memory and the
  • Bearing chamber circulate, so that the risk of leakage is low.
  • storage fluids are available, which - in contrast to the currently widespread refrigerants - are ecologically and technically safe in the event of an escape.
  • the detached from the bearing chamber assembly can be separated from the local
  • Storage chamber can be placed on a poorly accessible, hardly usable for a user place, for example, in the base area of a kitchen furniture or near the ceiling in an upper portion of the kitchen furniture, so that more accessible areas can be completely reserved for the storage of refrigerated goods.
  • Phase change material is completely thawed; An excessive increase in temperature in the time between the switching on of the refrigerator and its effectiveness is avoided by in this meantime the higher melting phase change material on or thaws.
  • the storage fluid is preferably a homogeneous mixture of liquids, such as water and mono- or polyhydric alcohols, optionally with dissolved solid additives such as various salts.
  • FIG. 1 is a block diagram of a refrigerator according to a first embodiment of the invention
  • FIG. 2 is a block diagram of a refrigerator according to a second embodiment of the
  • FIG 3 shows a third embodiment of a refrigeration device with two storage chambers.
  • Fig. 5 is a block diagram of a refrigerator with two different
  • Phase change matenals is a schematic section through a built-in kitchen furniture inventive household refrigerator.
  • Fig. 7 shows a second embodiment of the built-in kitchen furniture
  • the household refrigerating appliance illustrated in a schematic block diagram in FIG. 1 comprises a refrigerating machine 1, a buffer store 2 and a heat-insulating housing 4 surrounding a storage chamber 3.
  • the refrigerating machine 1 may be of any type per se, for example a Stirling machine or a thermoelectric element , Shown in the figure is a chiller 1 of the vapor compression type known per se, comprising a compressor 5, a condenser 6, which is connected to the compressor 5 in a refrigerant circuit and receives from the compressor 5 compressed, warm refrigerant to its heat to the environment a capillary 7 and a via the capillary 7 with liquid refrigerant fed by the condenser 6 evaporator 8, at the output of the compressor fifth
  • the evaporator 8 is mounted in the buffer memory 2 and surrounded by storage fluid 9.
  • a container 10 enclosing the storage fluid 9 is in turn of one
  • Phase change material 1 1 surrounded, and this in turn is contained in a double-walled container 12, the hollow wall is evacuated.
  • a temperature sensor 13 for controlling the operation of the compressor 5 is in thermal contact with the
  • a storage fluid circuit 14 extends through the phase change material 1 1 and the double-walled container 12 through to a pump 15 and from there via a standing in thermal contact with the storage chamber 3 heat exchanger 16 back to the container 10.
  • the heat exchanger 16 can in a known manner free in the
  • Storage chamber 3 may be mounted, mounted in the manner of a cold-wall evaporator between an inner container and an insulating material layer of the housing 4 or mounted in the manner of a no-frost evaporator in a separate chamber, wherein a fan cold air between this chamber and the storage chamber 3 circulated.
  • the operation of the pump 15 is through a arranged on the bearing chamber 3 temperature sensor 17th controlled. A switch-on, beyond which the temperature sensor 17, the pump 15 turns on, can be adjusted by a user.
  • the switching hysteresis ie the difference between the switch-on temperature and a switch-off temperature below which the pump 15 is switched off again, is fixed and can be, for example, about 1 ° C.
  • the temperature at which the phase change material 11 passes between the solid and the liquid state is lower than the lowest set temperature of the storage chamber 3 which can be set at the temperature sensor 17.
  • the temperature of the storage fluid 9, at which the temperature sensor 13 switches on the compressor 5, is above that Phase transition temperature of the material 1 1; the temperature at which he turns off the compressor 5, is below. Therefore, once the compressor 5 has been turned on, it operates as long as necessary to fully freeze the phase change material 11.
  • Temperature sensor 13 is greater than that of the temperature sensor 17 to long
  • Fig. 2 shows a second embodiment of the refrigerator according to the invention with two
  • Bearing chambers, 3 is set to a lower operating temperature than the higher storage chamber 18.
  • the storage chamber 3, a freezer and the storage chamber 18 form a normal refrigeration compartment.
  • An outlet 22 leading to the pump 15 is formed at the bottom of the container 10 in order to be able to supply the storage chamber 3 with the coldest available storage fluid 9 at the bottom of the container 10.
  • a connection located halfway up the container 10 forms both an inlet 23 for flowing back from the storage chamber 3 to the container 10
  • An inlet 25, passes through the warmed in the storage chamber 18 storage fluid back into the container 10, located at the top thereof.
  • Ports is limited to three, on the one hand created the possibility to cool the warmed storage chamber 18 with storage fluid, which is no longer cold enough to cool the storage chamber 3, and in this way to extend the on and off phases of the compressor 5 even further.
  • the compressor 5 starts again when only one of the two storage chambers 3, 18 can no longer be supplied with storage fluid of adequate temperature, two are in the container 10
  • Temperature sensor 13, 26 arranged.
  • the one, 13, is located between the
  • the other, 26, is located between the ports 24, 25 to judge whether, for proper cooling of the storage chamber 18, the chiller 1 must be re-started.
  • the embodiment of the refrigerator shown in Fig. 3 differs from that of FIG. 2 by the arrangement of the terminals 23, 24.
  • Storage chamber 3 incoming inlet port 23 is higher here than the
  • a first assembly 27 of the refrigeration device here comprises the chiller 1, the buffer memory 2 and line sections 28, which connect the storage fluid container 12 with couplings 29, 30 in a housing of the first module 27.
  • the couplings 29 are connected to a further assembly 31, which in the case shown here, the warmer storage chamber 18 and the pump 19 and heat exchanger 20 includes.
  • the clutches 30 are blind plugged to the If necessary, to be able to retrofit a subassembly 32 containing the bearing chamber 3 in the figure by dashed lines.
  • FIG. 5 shows a development of the invention. Although the representation of FIG. 5 is based on that of FIG. 2, the development is also based on the embodiments of FIG.
  • FIG. 5 the container 10 containing the storage fluid 9 is surrounded by two different phase change materials 11, 33 whose phase transition temperatures differ by a few degrees Celsius.
  • the container 12 is divided by a partition into two chambers for the materials 1 1, 33; In principle, however, it is also conceivable to charge each other immiscible phase change materials in a uniform container 12.
  • the higher-melting phase change material 33 is accommodated in an upper part of the container 12, and its amount is significantly smaller than that of the lower melting phase change material 1 1.
  • Temperature sensor 13 is between the two melting temperatures, so that the
  • Compressor 5 is turned on when the material 11 is complete, the material 33 but not yet melted.
  • Phase change materials 1 1, 33 it is possible to reliably turn on the compressor 5 again, before the phase change material 33 is thawed, and so on
  • Chiller 1 is only slightly larger than the heat flow into the storage chamber 3 and the chiller 1 is therefore not able to compensate for a short-term increased heat input into the storage chamber 3, such as by repeatedly opening a door or by storing warm refrigerated goods in a short time ,
  • Assigned control circuit preferably the on and off temperature of the compressor 5, but at least the switch-off, depending on the
  • Time of day varies. By setting this temperature (s) at given preferred times, in particular at night, lower than at other times and in particular during the day, it can be achieved that the chiller 1 operates substantially continuously at these times, so that the phase change material is complete in the morning is frozen.
  • the refrigeration device has a cold storage, which is consumed during the day, when the electricity is more expensive than the set preferred time.
  • the shutdown temperature of the compressor can be set higher than the phase transition temperature of the phase change material, so that the compressor does not work in this time more than necessary to keep the storage chamber 3 at the set temperature. This makes the refrigerator according to the invention for the user extremely economical.
  • Fig. 6 shows a first example of a possible placement of the modules 27, 31, 32 of the refrigerator according to the invention in a kitchen furniture.
  • the storage chamber assemblies 31, 32 each occupy a niche closed by a door 34 or 35 of the kitchen furniture; the chiller assembly 27 is located in one
  • Storage chambers 3, 18 can occupy a large fraction of the volume of the niches.
  • a similar advantage is achieved according to the arrangement shown in Fig. 7 in that the refrigerating machine assembly 27 is housed in an upper portion of the cabinet above eye level of a user in front of it.
  • the depth of the assembly 27 is significantly smaller than that of the furniture, so that between the assembly 27 and a Front of the furniture room for a closable by another door or flap 37 compartment 38 remains.
  • the fact that the depth of this compartment 38 is smaller than that of the furniture hardly affects its usability since the space occupied by the assembly 27 for a user standing in front of the furniture is hardly visible anyway and therefore would be of limited use for accommodating objects.
  • the assembly 27 may be higher than the base region 36 of the furniture. This facilitates the accommodation of a compactly shaped container 10, which consequently can be efficiently insulated with little effort, in the assembly 27.

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

Abstract

Appareil de froid, en particulier appareil de froid ménager, qui comporte une machine frigorifique (1), un réservoir tampon (2) refroidi par la machine frigorifique (1) et contenant un fluide accumulateur (9), au moins une chambre de stockage (3) et des moyens (15) permettant de faire circuler le fluide accumulateur (9) entre le réservoir tampon (2) et la chambre de stockage (3). Selon l'invention, au moins une matière à changement de phase (11) se trouve en contact thermique avec le réservoir tampon (2).
PCT/EP2011/068341 2010-11-03 2011-10-20 Appareil de froid pourvu d'un réservoir tampon Ceased WO2012059332A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010043245 DE102010043245A1 (de) 2010-11-03 2010-11-03 Kältegerät mit Pufferspeicher
DE102010043245.8 2010-11-03

Publications (2)

Publication Number Publication Date
WO2012059332A2 true WO2012059332A2 (fr) 2012-05-10
WO2012059332A3 WO2012059332A3 (fr) 2013-02-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/068341 Ceased WO2012059332A2 (fr) 2010-11-03 2011-10-20 Appareil de froid pourvu d'un réservoir tampon

Country Status (2)

Country Link
DE (1) DE102010043245A1 (fr)
WO (1) WO2012059332A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012103715U1 (de) 2012-09-27 2012-12-14 Viessmann Kältetechnik AG Einrichtung zur Bestimmung des Ladezustands eines thermischen Speichers
DE202012103717U1 (de) 2012-09-27 2012-12-14 Viessmann Kältetechnik AG Thermischer Speicher für Kälteanlagen
EP3147602A1 (fr) * 2015-09-24 2017-03-29 F. Hoffmann-La Roche AG Circuit de refroidissement centralisé
CN106931720A (zh) * 2017-03-09 2017-07-07 顺丰速运有限公司 一种保温箱体及物流运输设备
DE102022115652A1 (de) 2022-06-23 2023-12-28 Hof Sonderanlagenbau Gesellschaft mit beschränkter Haftung Pufferspeicher zur kältespeicherung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012020958A1 (de) * 2012-10-25 2014-04-30 Volkswagen Aktiengesellschaft Kühleinrichtung zur Kühlung einer elektrischen Maschine sowie elektrische Maschine mit einer solchen
ES2603065T3 (es) 2013-12-09 2017-02-23 Tutech Innovation Gmbh Dispositivo refrigerador para la evacuación de una corriente de calor
DE102016121825B4 (de) * 2016-11-14 2025-07-24 Rittal Gmbh & Co. Kg Chiller mit Kompressionskältemittelkreislauf und Pufferspeicher, eine entsprechende Kühlanordnung sowie ein entsprechendes Betriebsverfahren
DE102021105590A1 (de) 2021-03-09 2022-09-15 Audi Aktiengesellschaft Reservoir und Kühlsystem zur Steigerung einer Effizienz eines wärmeabgebenden Moduls

Citations (1)

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US4800729A (en) 1986-08-27 1989-01-31 Hoshizaki Electric Co., Ltd. Thermo-hygrostatic refrigerators

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FR2691237B1 (fr) * 1992-05-15 1996-05-10 Grandi Rene Dispositif de regeneration de joules ou de frigories pour module d'accumulation et de distribution de froid.
US5680898A (en) * 1994-08-02 1997-10-28 Store Heat And Produce Energy, Inc. Heat pump and air conditioning system incorporating thermal storage
GB2316158A (en) * 1996-08-10 1998-02-18 Stephen David John George Refrigeration systems
US5755987A (en) * 1996-08-23 1998-05-26 The Dow Chemical Company Dibasic ester based phase change material compositions
SE9804146D0 (sv) * 1998-12-01 1998-12-01 Siemens Elema Ab Packaging
DE19907250A1 (de) * 1999-02-20 2000-08-24 Christian Liebetanz Kältemaschine
JP5099503B2 (ja) * 2004-07-22 2012-12-19 イーアールエイ （エンビロンメンタル リフリジェレイション オルターナティブズ） ピーティーワイ エルティーディー 冷却装置

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Publication number Priority date Publication date Assignee Title
US4800729A (en) 1986-08-27 1989-01-31 Hoshizaki Electric Co., Ltd. Thermo-hygrostatic refrigerators

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012103715U1 (de) 2012-09-27 2012-12-14 Viessmann Kältetechnik AG Einrichtung zur Bestimmung des Ladezustands eines thermischen Speichers
DE202012103717U1 (de) 2012-09-27 2012-12-14 Viessmann Kältetechnik AG Thermischer Speicher für Kälteanlagen
EP2713133A1 (fr) 2012-09-27 2014-04-02 Viessmann Kältetechnik GmbH Dispositif de détermination de l'état de charge d'un accumulateur thermique
EP2713130A2 (fr) 2012-09-27 2014-04-02 Viessmann Kältetechnik GmbH Accumulateur thermique pour installations de refroidissement
EP3147602A1 (fr) * 2015-09-24 2017-03-29 F. Hoffmann-La Roche AG Circuit de refroidissement centralisé
CN106931720A (zh) * 2017-03-09 2017-07-07 顺丰速运有限公司 一种保温箱体及物流运输设备
DE102022115652A1 (de) 2022-06-23 2023-12-28 Hof Sonderanlagenbau Gesellschaft mit beschränkter Haftung Pufferspeicher zur kältespeicherung
DE102022115652B4 (de) 2022-06-23 2024-11-28 Hof Sonderanlagenbau Gesellschaft mit beschränkter Haftung Pufferspeicher zur kältespeicherung

Also Published As

Publication number Publication date
DE102010043245A1 (de) 2012-05-03
WO2012059332A3 (fr) 2013-02-21

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