EP3314181A1 - Appareil de froid muni d'une surveillance de lhumidité de l'air - Google Patents

Appareil de froid muni d'une surveillance de lhumidité de l'air

Info

Publication number
EP3314181A1
EP3314181A1 EP16726335.9A EP16726335A EP3314181A1 EP 3314181 A1 EP3314181 A1 EP 3314181A1 EP 16726335 A EP16726335 A EP 16726335A EP 3314181 A1 EP3314181 A1 EP 3314181A1
Authority
EP
European Patent Office
Prior art keywords
storage chamber
temperature
humidity
evaporator
air
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.)
Withdrawn
Application number
EP16726335.9A
Other languages
German (de)
English (en)
Inventor
Niels Liengaard
Hanna KÖZLE
Antje ENGSTLER
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 EP3314181A1 publication Critical patent/EP3314181A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control 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
    • 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
    • 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
    • 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
    • F25D21/04—Preventing the formation of frost or condensate
    • 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
    • F25D23/00—General constructional features
    • 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
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/02—Humidity
    • 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
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0413—Treating air flowing to refrigeration compartments by purification by humidification
    • F25D2317/04131—Control means therefor
    • 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
    • F25D2400/36—Visual displays
    • 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 refrigerator, in particular a household refrigerator.
  • the relative humidity that prevails in a storage chamber of a refrigerator is of high importance for the shelf life of food therein. Especially for the storage of fresh vegetables, a high humidity is desirable.
  • a high humidity is desirable.
  • the object of the invention is to provide a refrigeration device or a Betrie bsvin for a refrigerator, which give the user improved control over the humidity in the refrigerator.
  • a refrigeration device with a storage chamber and a storage chamber cooling evaporator, wherein a processing unit is set to assign at a given temperature of the storage chamber values of humidity in the storage chamber and a vaporization temperature of the evaporator each other assuming that the absolute water vapor content of the air in the storage chamber is the same as that of water vapor saturated air, i. H. Air with 100% relative humidity, at the evaporation temperature.
  • the assignment can be made in different directions and serve different purposes.
  • sensors for measuring the temperature of the storage chamber and the evaporation temperature and the processing unit is arranged to assume a value of the evaporation temperature when given, to estimate the humidity corresponding to the temperature of the storage chamber, and the like to display estimated air humidity on a display instrument.
  • the processing unit is arranged to assume a value of the evaporation temperature when given, to estimate the humidity corresponding to the temperature of the storage chamber, and the like to display estimated air humidity on a display instrument.
  • a control element is provided to adjust the humidity in the storage chamber as a target size
  • the processing unit is with the Control connected and set up, when assigning to a set on the control, given target value of the humidity estimate a target value of the evaporation temperature and to match the real evaporating temperature of the evaporator to the target value.
  • the evaporator may be part of a refrigerant circuit in which the flow rate of a compressor is controllable to vary the pressure in the evaporator.
  • an influencing of the evaporation temperature is also possible by controlling the opening cross-section of at least one throttle valve connected in series with the evaporator, upstream or downstream.
  • the evaporation temperature must be set higher than for a low value of the humidity.
  • a fan with controllable throughput may be provided to circulate air between the evaporator and the storage chamber.
  • the Control circuit to maintain at a given temperature, a high relative humidity in the storage chamber, specify a higher speed of the fan than when a low humidity is set.
  • the invention further relates to a method for estimating the relative humidity in a refrigeration appliance, in particular a refrigeration appliance as described above, with the steps
  • the relative humidity calculated in this way can be displayed as an estimated value for the relative humidity in the storage chamber of the refrigerating appliance on a display instrument of the refrigerating appliance.
  • Another subject of the invention is a method for operating a refrigeration device, in particular a refrigeration device as described above, with the steps
  • Fig. 1 is a block diagram of a refrigerator according to the invention.
  • Fig. 2 is a schematic cross-section through part of the housing of
  • Refrigeration unit and Fig. 3 is a diagram of the relationship between evaporation temperature and relative humidity in the vegetable compartment of the refrigerator.
  • Fig. 1 shows a block diagram of a household refrigerator with a plurality of storage chambers 1, 2, 3 which are cooled by a respective evaporator 4, 5 and 6 respectively.
  • the evaporators 4, 5, 6 are connected to each other in series in a refrigerant circuit.
  • Fig. 1 three storage chambers and evaporators are shown, but the principle of the invention explained below is applicable to refrigerators with any number of storage chambers including a single.
  • a variable speed compressor 7 is connected to a suction port of the last, 6, the series-connected evaporator.
  • a control circuit 8 controls the speed of the compressor 7 on the basis of measured by means of temperature sensors 9 to 1 1 in the storage chambers 1, 2, 3 temperatures to a value at which the power of the compressor 7 just enough to the cooling needs of the storage chambers 1 to 3 cover.
  • a regulation can be based on the fact that when the temperature in one of the storage chambers 1, 2, 3 leaves a set interval, the compressor speed is increased and, when the interval is left, this speed is decremented.
  • the compressed in the compressor 7 and thereby adiabatically heated refrigerant releases its heat via a condenser 12 to the environment and passes from there back to the evaporators 4, 5, 6.
  • Each evaporator is preceded by a controllable by the control circuit 8 throttle valve 13, 14 and 15 in series.
  • the series-connected throttle valves 13, 14, 15 form a flow resistance, which sets the mass flow rate of the refrigerant circuit. How the flow resistance is distributed to the individual throttle valves 13, 14, 15 is variable, ie if one of the throttle valves is narrowed, another can simultaneously be expanded so that the mass flow rate remains unchanged. For example, by reducing the flow resistance of the throttle valve 13 and simultaneously increasing the flow resistance of the throttle valve 14, it is possible to increase the pressure and thus the vaporization temperature in the evaporator 4 increase, without this on pressure and temperature in the downstream evaporators 5, 6 effects.
  • Fig. 2 shows a schematic cross section through part of the housing of the refrigerator with the storage chamber l.
  • the storage chamber 1 is shown here as the lowest storage chamber of the housing, but can also be located in other positions. Due to the position of the storage chamber 1 in the lower region of the housing, near a floor, a drawer 16 can facilitate access to refrigerated goods stored therein. Unlike conventional refrigerators, the drawer 16 is not closed and does not need to be so to protect its contents from drying out. In order to protect the refrigerated goods from contact with waterlogging, instead of the pull-out box 16, even a grid or grid may be advantageous as a support for the refrigerated goods.
  • the evaporator 4 is housed as a NoFrost evaporator in an evaporator chamber 18 separated from the rest of the storage chamber 1 by a wall 17. It also includes a fan 19 which is operable by the variable speed control circuit 8 to draw air through the evaporator 4 and to guide the air thus cooled back into the storage chamber 1 and around the drawer 16 via a back wall duct 20.
  • the temperature sensor 9 is mounted at a location of the storage chamber 1, where it is protected from direct flow with exiting the rear wall duct 20 air, here, for example, in a side wall of the refrigerator housing, a flank of the pull-out box 16 opposite.
  • Another temperature sensor 21 is provided in the evaporator chamber 18, it may be mounted directly on the evaporator 4 itself; Fig. 2 shows it downstream of the evaporator 4 at a position where it is directly exposed to the flow of cooled in the evaporator 4 to the evaporation temperature air.
  • the evaporator 4 Under normal operating conditions, the evaporator 4 is always a few ° C colder than the air in the storage chamber l. When this air cools below its dew point as it passes through the evaporator 4, a portion of the entrained moisture condenses on the evaporator 4, and the air exiting the evaporator 4 has a relative humidity of 100%. When this air returns to the storage chamber 1 and heats up to the temperature prevailing there, its relative humidity accordingly decreases according to the formula
  • T is the temperature measured by the temperature sensor 9 air temperature in the storage chamber l and TD measured by the temperature sensor 21 evaporation temperature
  • a, b for depending on the nature of the phase transition of the most Evaporator 4 takes place, may have different values.
  • an evaporation temperature> 0 ° C is sufficient.
  • a display instrument 22, on which the control circuit 8 outputs the estimated value of the air humidity in the storage chamber 1 calculated according to the above formula (1), can be arranged on the outside of the housing of the appliance, as shown in the figure, or it can be inside, adjacent to the storage chamber 1 to be mounted at a location where it is visible only after opening the door 23.
  • Fig. 3 shows schematically the relationship between evaporation temperature TD, storage chamber temperature T and relative humidity r. If the evaporation temperature TD were equal to the compartment temperature T, condensation would not occur at the evaporator 4, the storage chamber 1 would thus be deprived of moisture and the humidity r could reach a value of 100%.
  • the evaporator 4 in order to cool the chamber 1, must be colder than this, in practice, the case occurs that TD is less than T and an air humidity r of less than 100% is achieved.
  • the evaporation temperature TD is always a few ° C lower than the compartment temperature T, for example, at a set temperature of the storage chamber of + 3 ° C, the evaporator 4 may be controlled to a temperature TD of +1 ° C, then the dehumidification The air at the evaporator 4 minimal, and the relative humidity r, which is set in the storage chamber l, is just below 100%.
  • evaporation temperature TD of, for example, -5 ° C significantly more moisture is deposited on the evaporator 4, so that sets in the storage chamber 1, a lower relative humidity r.
  • the control circuit 8 is able to produce a relative humidity in the storage chamber 1 specified by the user on the operating element 24.
  • no lid on the pull-out box 16 is required to keep the humidity high inside the pull-out box. Therefore, with the refrigeration appliance according to the invention against evaporation sensitive refrigerated goods can be kept fresh for a long time without a lid would impede access to the refrigerated goods.

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

Abstract

L'invention concerne un appareil de froid comportant une chambre de stockage (1) et un évaporateur (4) destiné à refroidir la chambre de stockage (1). Selon l'invention, une unité de traitement (8) est conçue pour, à une température (T) donnée de la chambre de stockage (1), associer entre elles des valeurs de l'humidité de l'air (r) dans la chambre de stockage (1) et une température d'évaporation (TD) de l'évaporateur (4) en admettant que la teneur en vapeur d'eau absolue de l'air de la chambre de stockage (1) est identique à celle de l'air saturé en vapeur d'eau à la température d'évaporation (TD). Cette association permet d'une part, grâce aux températures, d'évaluer l'humidité relative de l'air dans la chambre de stockage (1), et d'autre part, par régulation de la température d'émission d'air (TD) tout en conservant une température (T) constante de la chambre de stockage (1), d'agir sur l'humidité de l'air (r) dans celle-ci.
EP16726335.9A 2015-06-26 2016-06-02 Appareil de froid muni d'une surveillance de lhumidité de l'air Withdrawn EP3314181A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015211960.2A DE102015211960A1 (de) 2015-06-26 2015-06-26 Kältegerät mit Luftfeuchteüberwachung
PCT/EP2016/062467 WO2016206938A1 (fr) 2015-06-26 2016-06-02 Appareil de froid muni d'une surveillance de lhumidité de l'air

Publications (1)

Publication Number Publication Date
EP3314181A1 true EP3314181A1 (fr) 2018-05-02

Family

ID=56096640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16726335.9A Withdrawn EP3314181A1 (fr) 2015-06-26 2016-06-02 Appareil de froid muni d'une surveillance de lhumidité de l'air

Country Status (5)

Country Link
US (1) US20180187968A1 (fr)
EP (1) EP3314181A1 (fr)
CN (1) CN107810375B (fr)
DE (1) DE102015211960A1 (fr)
WO (1) WO2016206938A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016222948A1 (de) 2016-11-21 2018-05-24 BSH Hausgeräte GmbH Kältegerät mit luftfeuchtigkeitsoptimiertem Lagerfach
DE102017205426A1 (de) * 2017-03-30 2018-10-04 BSH Hausgeräte GmbH Kältegerät und Betriebsverfahren dafür
DE102017205429A1 (de) * 2017-03-30 2018-10-04 BSH Hausgeräte GmbH Kältegerät und Betriebsverfahren dafür
CN111854265B (zh) * 2019-04-30 2022-06-14 松下电器研究开发(苏州)有限公司 冰箱及其控制方法

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US20050166609A1 (en) * 2002-07-08 2005-08-04 Danfoss A/S Method and a device for detecting flash gas

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EP2546084A1 (fr) * 2011-07-12 2013-01-16 A.P. Møller - Mærsk A/S Contrôle de l'humidité dans un conteneur de transport réfrigéré doté d'un compresseur à fonctionnement intermittent
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EP2966374B1 (fr) * 2013-03-05 2020-08-12 Mitsubishi Electric Corporation Système de conditionnement d'air
US20150107280A1 (en) * 2013-10-17 2015-04-23 General Electric Company Method for operating a refrigerator appliance

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US20050166609A1 (en) * 2002-07-08 2005-08-04 Danfoss A/S Method and a device for detecting flash gas

Also Published As

Publication number Publication date
WO2016206938A1 (fr) 2016-12-29
DE102015211960A1 (de) 2016-12-29
CN107810375B (zh) 2020-08-14
CN107810375A (zh) 2018-03-16
US20180187968A1 (en) 2018-07-05

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