EP2880385A1 - Appareil frigorifique avec bac d'évaporation - Google Patents

Appareil frigorifique avec bac d'évaporation

Info

Publication number
EP2880385A1
EP2880385A1 EP13737271.0A EP13737271A EP2880385A1 EP 2880385 A1 EP2880385 A1 EP 2880385A1 EP 13737271 A EP13737271 A EP 13737271A EP 2880385 A1 EP2880385 A1 EP 2880385A1
Authority
EP
European Patent Office
Prior art keywords
control unit
compressor motor
rotation
evaporation tray
storage chamber
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
EP13737271.0A
Other languages
German (de)
English (en)
Other versions
EP2880385B1 (fr
Inventor
Achim Paulduro
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 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2880385A1 publication Critical patent/EP2880385A1/fr
Application granted granted Critical
Publication of EP2880385B1 publication Critical patent/EP2880385B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1411—Removal by evaporation using compressor heat

Definitions

  • the present invention relates to a refrigeration appliance, in particular a household refrigeration appliance such as a refrigerator or freezer, with an evaporation tray for evaporating condensate derived from a storage chamber of the device and a compressor through the waste heat, the evaporation tray is heated.
  • a refrigeration appliance in particular a household refrigeration appliance such as a refrigerator or freezer, with an evaporation tray for evaporating condensate derived from a storage chamber of the device and a compressor through the waste heat, the evaporation tray is heated.
  • Water level in the evaporation tray is critically high, are switched to the less efficient mode, in order to generate more waste heat and to evaporate the water in the evaporation tray faster.
  • a prerequisite for operation of the compressor even in the less efficient mode is that the storage chamber of the refrigeration appliance actually has cooling requirements. If you were to run the compressor without cooling the storage chamber, only to have enough heat to evaporate the condensation available, this would be highly energy-efficient, since only a portion of the electrical power absorbed by the compressor is actually converted into waste heat to evaporate the dew
  • cooling the storage chamber below a desired storage temperature brings no benefit or even cause frost damage to the refrigerated goods in the worst case.
  • Object of the present invention is to provide a refrigeration device with evaporation tray, in which, if necessary, at any time to provide heat to promote evaporation in the evaporation tray, without having its own
  • Heating device is required.
  • Compressor motor provides suitable current, and a Walker Häsmodus is switchable, in which it provides an unsuitable for driving the rotation current, i. a current that flows though the compressor motor and there releases Joule heat, but does not drive rotation.
  • such an unsuitable current for driving a rotation may be a direct current to which a single winding of the compressor motor is applied.
  • thermal load is distributed to different windings of the compressor motor.
  • the control unit comprises an inverter.
  • the compressor motor may comprise, in a conventional manner, at least three terminals which supply different windings of the compressor motor and are to be energized in a first order in order to drive a rotation of the compressor motor in a working direction.
  • the control circuit can then be set up in the
  • Heating mode to energize the terminals in a different order from the first order.
  • the windings of the compressor motor are so with the
  • Terminals are connected to generate a magnetic field with a first rotational direction rotating when energizing the terminals in the first order, and the armature of the motor starts to rotate by trying to align itself in the rotating field.
  • the second order may then be suitably chosen such that a magnetic field rotating with an alternating sense of rotation or an oscillating magnetic field is generated.
  • the armature tries to align itself in such a magnetic field, here the constant change of the field direction prevents the armature from being accelerated and a rotation starting up.
  • the control unit should be set up appropriately, the heat demand of
  • control unit To estimate the heat demand, the control unit with a at the
  • Humidity sensor With the aid of the measured values of such a sensor, the amount of moisture contained in the air of the storage chamber can be estimated, which in the near future will reach the evaporation tray as condensate.
  • the control unit can also be connected to a door opening sensor to estimate when and to what extent fresh and moist ambient air enters the storage chamber.
  • Fig. 1 is a schematic section through a household refrigerator, to which the present invention is applicable;
  • FIG. 2 is a schematic circuit diagram of an inverter used in the refrigerator of FIG. 1; FIG. and
  • Fig. 3 shows the timing of the inverter in the
  • Compressor motor of the refrigerator applied switching states Compressor motor of the refrigerator applied switching states.
  • the household refrigerating appliance shown in Fig. 1, here a refrigerator has in a usual way a heat-insulating housing with a body 1 and a lying outside the cutting plane of the figure door, which limits a storage chamber 3 together with the body 1.
  • the storage chamber 3 is here by a on its rear wall 2 between a
  • Nofrost freezer as this, at least in a defrosting phase of its evaporator, also releases condensation.
  • the base extends through the
  • Condensation water which precipitates at the area of the inner container cooled by the evaporator 4 and flows downwards, traps.
  • a pipeline 8 leads from the lowest point of the gutter 7 through the insulating foam layer through to an evaporation tray 9, which in a machine room 5 on a housing of a
  • Compressor 6 is mounted to be heated by waste heat of the compressor, in particular its drive motor.
  • a corresponding pipeline could emanate from the bottom of a chamber receiving the evaporator.
  • the compressor 6 is common in the art and therefore not specifically in a figure
  • a pressure connection of the compressor 6 in a row one e.g. Condenser mounted outside on the rear wall 2, a throttle and the evaporator 4 are connected.
  • An outlet of the evaporator 4 is in turn connected to a suction port of the compressor 6.
  • An electronic control unit 10 comprises a microprocessor or microcontroller which is connected to a temperature sensor 11 arranged on the storage chamber 3 in order to control the operation of the compressor 6 on the basis of the temperature of the storage chamber 3.
  • the control unit 10 is also adapted to estimate the amount of heat needed by the evaporation tray 9 to evaporate the condensation water flowing in it fast enough so that the evaporation tray 9 does not overflow.
  • a water level sensor 12 e.g. a float switch in the
  • Evaporation tray 9 may be arranged, and the control unit 10 detects a
  • Numerous other approaches for assessing the heat demand are conceivable, even those that do not require immediate measurement of the water level in the evaporation tray 9.
  • a temperature sensor may be provided which detects a heating resulting from the operation of the compressor 6. From the rate of warming can affect the amount of water in the
  • Evaporation tray 9 are closed.
  • Storage chamber 3 may be provided.
  • a temperature sensor arranged on the evaporator 4, the
  • Speed can be measured, with which cools when turning on the compressor 6, the evaporator 4, and from this, the control unit 10 can infer the rate at which precipitates moisture on the evaporator 4, which later in the
  • FIG. 2 shows a block diagram of the control unit 10 and the motor 13 of the compressor 6 which it controls.
  • a microprocessor 14 controls six switches SU 1, SV 1, SW 1, SU 2, SV 2, SW 2 of an inverter 15, of which the switches SU 1, SV 1 , SW1 are arranged between a positive supply potential (+) and a terminal or phase U, V or W of the motor 13, and the switches SU2, SV2, SW2 each between one of these three terminals or phases and a negative supply potential (-) arranged are.
  • the switches may, in a manner known per se, be IGBTs with a freewheeling diode or MOSFETs connected in parallel.
  • the microprocessor 14 can with the above-mentioned, with the sensors 1 1, 12th be connected microprocessor identical, or it may be a second, responsible only for the sequence control of the motor 13 microprocessor. In the latter case, the two microprocessors will usually be mounted separately from each other, one in the vicinity of a user interface whose inputs it processes, the other 14 adjacent to the motor 13 controlled by it.
  • Three stator windings 16 of the motor 13 are arranged here in a star connection between the phases U, V, W. It will be obvious to a person skilled in the art that a triangular circuit is also suitable, or that the number of phases and windings can also be greater than three.
  • the microprocessor 14 periodically generates various switching states over time t, here six, designated by a, b, f in FIG.
  • FIG. 3 shows, for each of the switching states a to f, the state of the switches of the converter 15 and the resulting voltages at the connection terminals U, V, W of the motor 13.
  • the switches SU1, SW1 are closed.
  • the switches SU2, SW2, SV1 are open and the switch SV2 is pulsed open and closed.
  • Terminals U, V and V, W of the motor 13, and the resulting magnetic fields of the stator windings 16 are superimposed to a space vector u a .
  • the switches SV2, SW2 are open, SU2, SV1, SW1 are closed and SU1 is pulse-width-modulated; accordingly, current flows through the terminals U; V and U, W, resulting in a space vector u, which is opposite to u a by 60 ° in
  • the frequency with which the states a to f follow each other must be adapted to the rotational frequency of the armature. It may for example be controlled by means of a Hall sensor 17, which is arranged on the motor 13 and is exposed to the field of its rotating armature, or a sensorless
  • control unit 10 can energize the connection terminals U, V, W of the motor 13 in the heating operating mode.
  • One possibility is, for example, one of the switching states a to f over the entire duration of the heating operating mode
  • a second possibility is to energize the connection terminals U, V, W so that an oscillating space vector is obtained instead of a rotating space vector. This is possible, for example, by periodically switching between the states a and d. If the switching frequency between the two states is high, then the duration of, for example, the state a is not sufficient to bring the rotor into a stable equilibrium position corresponding to the space vector u a , and any rotation of the rotor that has already begun is immediately decelerated again in state d, so that the rotor trembles at most slightly, but no rotation gets going. If the switching frequency is so low that a stable equilibrium position is reached in state a, then this corresponds to
  • the distribution of the heating power to the stator windings 16 in this embodiment is the same as in the first considered case in which the switching state a is maintained throughout the heating operation. However, since the armature is not rotated, it is possible here and there to occasionally switch from pair of states a, d to another pair such as b, e or c, f so as to distribute the heating power more uniformly to the windings. According to a third embodiment, three also change in the heating mode

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un appareil frigorifique, en particulier un appareil frigorifique ménager, comprenant au moins une chambre de stockage (3), un bac d'évaporation (9) servant à évaporer l'eau de condensation évacuée par la chambre de stockage (3), un moteur de compresseur (13) disposé en contact thermique avec le bac d'évaporation (9) et une unité de commande (10) qui peut être commutée entre un mode d'entraînement, dans lequel elle fournit un courant adapté pour entraîner une rotation du moteur de compresseur (13), et un mode de chauffage, dans lequel elle fournit un courant inapproprié pour entraîner la rotation.
EP13737271.0A 2012-07-31 2013-07-17 Appareil frigorifique avec bac d'évaporation Active EP2880385B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012213468.9A DE102012213468A1 (de) 2012-07-31 2012-07-31 Kältegerät mit Verdunstungsschale
PCT/EP2013/065062 WO2014019850A1 (fr) 2012-07-31 2013-07-17 Appareil frigorifique avec bac d'évaporation

Publications (2)

Publication Number Publication Date
EP2880385A1 true EP2880385A1 (fr) 2015-06-10
EP2880385B1 EP2880385B1 (fr) 2018-08-15

Family

ID=48793271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13737271.0A Active EP2880385B1 (fr) 2012-07-31 2013-07-17 Appareil frigorifique avec bac d'évaporation

Country Status (4)

Country Link
EP (1) EP2880385B1 (fr)
CN (1) CN104508409B (fr)
DE (1) DE102012213468A1 (fr)
WO (1) WO2014019850A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3745054B1 (fr) 2019-05-29 2022-11-23 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de refroidissement et/ou de congélation
DE102019118784A1 (de) * 2019-05-29 2020-12-03 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
CN111884553A (zh) * 2020-08-04 2020-11-03 儒竞艾默生环境优化技术（上海）有限公司 压缩机预加热的电流矢量控制方法、介质、设备及系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3083959B2 (ja) * 1994-07-25 2000-09-04 シャープ株式会社 冷蔵庫
US6629429B1 (en) * 1999-03-12 2003-10-07 Matsushita Refrigeration Company Refrigerator
DE19956995A1 (de) * 1999-11-26 2001-05-31 Bsh Bosch Siemens Hausgeraete Kältegerät
DE10208558A1 (de) 2002-02-27 2003-09-04 Vasilios Zigaris Verdunstungswanne
DE10352742A1 (de) * 2003-11-12 2005-06-09 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit verbesserter Kondenswasserbeseitigung
DE102004012498A1 (de) * 2004-03-15 2005-10-06 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät
JP4931970B2 (ja) * 2009-08-10 2012-05-16 三菱電機株式会社 空気調和機
JP2011102674A (ja) * 2009-11-11 2011-05-26 Mitsubishi Electric Corp 空気調和機
DE102011085153A1 (de) 2011-10-25 2013-04-25 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit Verdunstungsschale

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014019850A1 *

Also Published As

Publication number Publication date
WO2014019850A1 (fr) 2014-02-06
DE102012213468A1 (de) 2014-02-06
CN104508409B (zh) 2016-09-07
EP2880385B1 (fr) 2018-08-15
CN104508409A (zh) 2015-04-08

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