[go: up one dir, main page]

WO2016034446A1 - Appareil frigorifique et machine frigorifique destinée audit appareil - Google Patents

Appareil frigorifique et machine frigorifique destinée audit appareil Download PDF

Info

Publication number
WO2016034446A1
WO2016034446A1 PCT/EP2015/069282 EP2015069282W WO2016034446A1 WO 2016034446 A1 WO2016034446 A1 WO 2016034446A1 EP 2015069282 W EP2015069282 W EP 2015069282W WO 2016034446 A1 WO2016034446 A1 WO 2016034446A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
compressor
stop valve
control unit
compartment
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/EP2015/069282
Other languages
German (de)
English (en)
Inventor
Andreas BABUCKE
Stefan Holzer
Matthias Mrzyglod
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 WO2016034446A1 publication Critical patent/WO2016034446A1/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
    • 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
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators

Definitions

  • the present invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, and more particularly to the construction of a refrigerator which can be used in such a refrigeration appliance.
  • Domestic refrigerators with two held at different operating temperatures storage compartments such as a freezer and a normal refrigerated compartment and a
  • Chillers each having a first evaporator for cooling the first storage compartment and a second evaporator for cooling the second storage compartment in mutually parallel branches of a refrigerant circuit, are known per se.
  • Object of the present invention is to provide a refrigerator with evaporators in mutually parallel branches of a refrigerant circuit, which allows reliable energy-efficient operation.
  • the object is achieved by, in a refrigerating machine with a compressor, a first and a second evaporator, which are arranged together with a respective upstream capillary in parallel branches of a refrigerant circuit, wherein in a downstream part of the refrigerant circuit between outputs of the evaporator and an input of the compressor a valve for locking a
  • Refrigerant flow is arranged from the first evaporator to the second evaporator, in an upstream part of the refrigerant circuit, between an output of the compressor and inputs of the evaporator, a stop valve is arranged and a control unit is arranged, at the end of a cooling phase of operation of at least one of the two evaporators, the compressor when it is closed Stop valve to operate.
  • Stop valve is arranged and a control unit is arranged, at the end of a cooling phase of operation of at least one of the two evaporators, the compressor when it is closed Stop valve to operate.
  • the affected evaporator is the first evaporator
  • the pressure in the first evaporator can be lowered and brought close to the pressure prevailing in the - generally colder - second evaporator.
  • the resulting reduced pressure difference between the two sides of the valve for blocking the flow of refrigerant also reduces any leakage of refrigerant vapor from the first to the second evaporator and a heating caused in particular by condensation of this refrigerant vapor in the second evaporator.
  • the affected evaporator is the second evaporator, then, by continuing the operation of the compressor, the amount of refrigerant left in the second evaporator after the cooling operation phase thereof can be reduced as necessary to ensure that a sufficient refrigerant amount for energy-efficient operation also is available in a subsequent cooling operation phase of the first evaporator.
  • the time between the closing of the stop valve and the end of the cooling operation phase can be 30-120 s in both cases.
  • a temperature sensor can be arranged at an outlet of the second evaporator, and the control unit can be set up to reduce the time between the closing of the second evaporator Stop valve and the end of the cooling phase of the second evaporator based on the temperature detected by the temperature sensor to regulate.
  • a low temperature indicates a large amount of refrigerant stored in the evaporator; the lower the detected temperature, the longer the time between the closing of the stop valve and the end of the cooling operation phase can be suitably selected.
  • An overflow in case of overfilling of the second evaporator can be avoided.
  • the time between the closing of the stop valve and the end of the cooling operation phase may be a continuous function of the temperature or may be switchable between a small number of discrete values. It can take the value zero.
  • the time between the closing of the stop valve and the end of the cooling operation phase also, for. B. on the basis of an empirically optimized for a given model of refrigeration device context, based on the ambient temperature and / or the time elapsed since the beginning of the cooling phase operating time to be controlled based on the assumption that these two factors a conclusion on the amount of in the second evaporator allow accumulated liquid refrigerant.
  • opening the stop valve simultaneously with the beginning of the aspiration would result in the evaporation of the fresh into the first evaporator taking place at an inappropriately low temperature and taking a long time, until a to desired evaporation temperature adjusts the appropriate pressure in the first evaporator.
  • a pressure can be set even before the start of the suction, and the evaporation is from the beginning at or near the desired temperature.
  • the time between the opening of the stop valve and the beginning of the suction can be several tens of seconds, typically about 60 seconds.
  • the compressor Since the compressor usually takes a certain amount of time to start up and reach its nominal compression capacity at startup, but the refrigerant flow is very rapid when opening the stop valve, the compressor can start at the same moment and the stop valve can be opened , the influx of refrigerant into the evaporator cause a temporary increase in pressure in the evaporator. If this is strong enough to prevent immediate evaporation of refrigerant entering the evaporator, then there is an input of heat into the evaporator. In order to avoid this, it makes sense that at the beginning of a cooling operation phase of the second evaporator, the control unit opens the stop valve only after a start of the compressor.
  • control unit may be configured to wait for the stop valve to open until a desired speed of the compressor has been reached.
  • in speed-controlled compressors representative of the current speed signal is often on the compressor or to an inverter, which supplies the compressor with electrical energy, can be tapped. It is simpler to pre-program a fixed waiting time between the start of the compressor and the opening of the stop valve in the control unit.
  • a refrigerant collector may be provided on the refrigerant circuit between an outlet of the compressor and the stop valve.
  • the refrigerant collector may be formed by a chamber inserted into the refrigerant pipe; however, components of the refrigerant circuit which usually serve another purpose may additionally be used as collectors, for example by using tubes of large cross-section for refrigerant lines in the upstream part of the refrigerant circuit or by making a dryer with a larger volume than required for the drying function. Such a dryer will generally only be partially filled with desiccant in order to be able to absorb liquid refrigerant in large quantities.
  • Subject of the invention is also a refrigerator, in particular a household refrigerator with a refrigerator as described above and with two cooled by the evaporators of the refrigerator storage compartments.
  • a control unit of this refrigeration device can be set up to cool both compartments successively when cooling is required in one of the compartments, and in this way for a long time
  • the second compartment and then the first one is cooled.
  • the temperature difference against which the chiller works can be kept smaller than in the opposite order, which in turn contributes to the energy efficiency of the operation.
  • Control unit expediently arranged to detect the temperature of the other compartment at the beginning of its cooling operation phase and a temperature of the other compartment in which it terminates this cooling operation phase, based on the detected temperature and a predetermined target temperature of the other compartment, ie individually for each cooling operation phase of the other compartment to set.
  • Fig. 1 is a schematic representation of the refrigerant circuit of a
  • Fig. 2 shows the development over time of electrical power consumption of a
  • Fig. 3 shows the evolution of the temperature of a compartment of the refrigerator in the course of
  • the refrigerant circuit shown in Fig. 1 comprises in a conventional manner
  • Compressor 1 having a compressed refrigerant outlet 2 and an inlet 3 for sucking refrigerant. At one of the output 2 outgoing
  • Refrigerant line 4 a condenser 5, a dryer 6, a switchable between an open state and a blocking state stop valve 7 and a directional control valve 8 are arranged in order. Between the condenser 5 and the dryer 8, a frame heater 23 may be inserted into the refrigerant line 4. At the directional control valve 8, the refrigerant line 4 divides into two branches 9, 10.
  • the directional control valve 8 can be integrated into the stop valve 7, in that the latter has three instead of two connections and two passage states, wherein in one of the passage states the directional control valve transfers the condenser 5 with the branch 9 and in the other with the branch 10 connects, and in the locked state to none of the branches 9, 10 is a connection.
  • each of the two evaporators 13, 14 cools a compartment 15 or 16 of the refrigeration device.
  • the mean operating temperature of the compartment 15 is higher than that of the compartment 16, for example, the compartment 15 may be a normal refrigerating compartment and the compartment 16 may be a freezing compartment of the refrigerating appliance.
  • the two branches 9, 10 meet again at a confluence 17.
  • a check valve 18 is arranged between an outlet of the evaporator 14 and the confluence 17, which allows a flow of refrigerant from the evaporator 14 to the compressor 1, but blocks in the opposite direction.
  • An electronic control unit 19 is connected to temperature sensors 20, 21 to the
  • Compartments 15, 16 connected to control the operation of the compressor 1 and the position of the stop valve 7 and the directional control valve 8 based on the temperatures measured there.
  • the capillary 1 1 of the normal cooling compartment 15 has at a given pressure drop of the
  • the mass flow rate of Verêtrsl is either, if it is a fixed-speed compressor, given by design or, in the case of a variable speed compressor, through the
  • Control unit 19 is set to a value which is between the flow rates of the capillary 1 1.
  • the capillary 12 has a much smaller mass flow rate than the capillary 1 1 at the same pressure drop.
  • the throughput of the capillary 12 is even lower for liquid refrigerant than the throughput of the compressor 1, so that the rate at which refrigerant condenses in the condenser 5, is higher than that with which it can flow through the capillary 12.
  • the dryer 6 is the dryer 6 as a
  • Refrigerant collector 22 is formed, that is, the housing of the dryer 6 is only one Part filled with absorber material, the rest is empty to provide space for the liquid refrigerant.
  • the control unit 19 can operate according to different methods.
  • a first embodiment of a working procedure result in the control unit
  • control unit initiates switch- on temperatures T on by adding a difference value ⁇ and switch- off temperatures T off by subtracting the
  • Tray 15, 16 is detected when the tray 15 or 16 associated
  • Temperature sensor 20 or 21 indicates a temperature greater than T on . If this is the case, the compressor 1 is turned on, and the temperature in the respective compartment 15 or 16 gradually decreases. If that subject is 15 or 16 on his
  • the subject compartment is the freezer compartment 16 then by continuing to operate the compressor 1 after closing the stop valve 7, the amount of refrigerant which could leak through the check valve 18 during the subsequent stoppage phase of the compressor can not be substantially reduced; It can be assumed that after a cooling operation phase of the freezer compartment 16, the evaporator 13 of the
  • Normal cooling compartment 15 is empty.
  • the continued operation of the Compressor 1 ensures that the amount of liquid refrigerant that is stored when closing the stop valve 7 in the evaporator 14, and instead refrigerant in the high-pressure region of the refrigerant pipe 4, in particular in the refrigerant collector 22, cached so that it is immediately available when the stop valve 7 is opened due to cooling demand in one of the compartments 15, 16 again.
  • the compressor 1 could also be switched on at the time when the control unit detects cooling demand of the normal cooling compartment 13, first to fill up the refrigerant collector 22, and only then open the stop valve 7 so that the refrigerant flows into the evaporator 13 in a surge-like manner and the pressure corresponding to a suitable for the normal refrigeration compartment 14 evaporation temperature just below 0 ° C, is achieved in a short time.
  • control unit 19 switches on the compressor 1 as soon as it is in one of the compartments 15, 16 that applies to this compartment
  • Switching temperature T on is exceeded, but then controls, regardless of in which of the compartments 15, 16, the cooling demand has occurred, the directional control valve 8 to connect the capillary 12 with the condenser 5, and so to cool the freezer compartment 16.
  • the condenser is still at ambient temperature, and the temperature difference between the evaporator 16 and the condenser 5 to be overcome is relatively low.
  • Compressor 1 at time tO first from the temperature T in the evaporator 13, as sucked by the operation of the compressor 1 refrigerant from the evaporator 13 and thereby its evaporation temperature is lowered.
  • Cooling phase of the freezer compartment 16 is not until it reaches its
  • Off temperature T off ended, but, as seen in Fig. 3, already for Time t1 at a temperature T1, which is around the value under the
  • Target temperature Ttarget is.
  • the freezer compartment 16 is cooled beforehand, the temperature of which only varies by a narrow interval around Ttarget, so that the mean temperature of the freezer compartment 16 further coincides with the target temperature Ttarget, which would not be the case As illustrated in FIG. 3 by a dashed curve, the cooling operating phase would only be terminated when T off is reached .
  • liquid refrigerant Due to the low mass flow rate of the capillary 12, liquid refrigerant has accumulated in front of the capillary 12 during the cooling operation of the freezer compartment 16 between tO and t1 (including the compressor follow-up phase after closing the stop valve 7). If at time t1, the directional control valve 8 is switched to connect the capillary 1 1 with the condenser 5, the liquid refrigerant accumulated in the dryer 6 flows rapidly through the capillary 1 1, it comes to a quick
  • the control unit 19 first closes the stop valve 7. Within a few 10 seconds, the pressure in the evaporator 13 drops to a value close to that in the evaporator 14.
  • the control unit 19 detects cooling demand in the freezer compartment 16. In this case, the evaporator 1 is operated until the switch- off temperature T off of the freezer compartment is reached at the time t5. In the case shown in Fig. 2 now the stop valve 7th
  • Evaporator 13 is detected at the beginning of its cooling phase, and the
  • Cooling phase is terminated as soon as the temperature detected by the sensor 20 is just below the target temperature T ta rget of the normal cooling compartment 15, as it has been at the beginning of the cooling operation phase above.
  • Stop valve 7 closed for a while, so even if in the

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

L'invention concerne une machine frigorifique destinée à un appareil ménager frigorifique muni de deux compartiments de rangement, laquelle comporte un compresseur (1) et un premier et un second évaporateur (13, 14) qui sont agencés chacun avec un capillaire (11, 12) monté an aval dans des branches parallèles (9, 10) d'un circuit de réfrigérant (4). Une soupape (18) servant à bloquer un écoulement de réfrigérant du premier évaporateur (13) vers le second évaporateur (14) est agencée dans une partie aval du circuit de réfrigérant (4) entre les sorties des évaporateurs (13, 14) et une entrée (3) du compresseur (1). Une soupape d'arrêt (7) est agencée dans une partie amont du circuit de réfrigérant (4) entre une sortie (2) du compresseur (1) et les entrées des évaporateurs (13, 14). Une unité de commande (19) est conçue pour, à l'issue d'une phase de fonctionnement d'au moins un des deux évaporateurs (13, 14) en mode refroidissement, faire fonctionner le compresseur (1) lorsque la soupape d'arrêt (7) est fermée.
PCT/EP2015/069282 2014-09-04 2015-08-21 Appareil frigorifique et machine frigorifique destinée audit appareil Ceased WO2016034446A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014217672.7 2014-09-04
DE102014217672.7A DE102014217672A1 (de) 2014-09-04 2014-09-04 Kältegerät und Kältemaschine dafür

Publications (1)

Publication Number Publication Date
WO2016034446A1 true WO2016034446A1 (fr) 2016-03-10

Family

ID=54064300

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/069282 Ceased WO2016034446A1 (fr) 2014-09-04 2015-08-21 Appareil frigorifique et machine frigorifique destinée audit appareil

Country Status (2)

Country Link
DE (1) DE102014217672A1 (fr)
WO (1) WO2016034446A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11435124B2 (en) 2018-02-28 2022-09-06 Carrier Corporation Refrigeration system with leak detection

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017000060A1 (de) 2016-10-05 2018-04-05 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000230767A (ja) * 1999-02-09 2000-08-22 Matsushita Refrig Co Ltd 冷蔵庫
JP2000346526A (ja) * 1999-06-10 2000-12-15 Matsushita Refrig Co Ltd 冷却システム
EP1087186A2 (fr) * 1999-09-21 2001-03-28 Kabushiki Kaisha Toshiba Réfrigérateur à deux évaporateurs
US20130186129A1 (en) * 2012-01-25 2013-07-25 Lg Electronics Inc. Refrigerator
WO2014056767A1 (fr) * 2012-10-09 2014-04-17 BSH Bosch und Siemens Hausgeräte GmbH Appareil frigorifique comprenant deux évaporateurs
DE102012222240A1 (de) * 2012-12-04 2014-06-18 BSH Bosch und Siemens Hausgeräte GmbH Mehrzonen-Kältegerät

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000230767A (ja) * 1999-02-09 2000-08-22 Matsushita Refrig Co Ltd 冷蔵庫
JP2000346526A (ja) * 1999-06-10 2000-12-15 Matsushita Refrig Co Ltd 冷却システム
EP1087186A2 (fr) * 1999-09-21 2001-03-28 Kabushiki Kaisha Toshiba Réfrigérateur à deux évaporateurs
US20130186129A1 (en) * 2012-01-25 2013-07-25 Lg Electronics Inc. Refrigerator
WO2014056767A1 (fr) * 2012-10-09 2014-04-17 BSH Bosch und Siemens Hausgeräte GmbH Appareil frigorifique comprenant deux évaporateurs
DE102012222240A1 (de) * 2012-12-04 2014-06-18 BSH Bosch und Siemens Hausgeräte GmbH Mehrzonen-Kältegerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11435124B2 (en) 2018-02-28 2022-09-06 Carrier Corporation Refrigeration system with leak detection

Also Published As

Publication number Publication date
DE102014217672A1 (de) 2016-03-10

Similar Documents

Publication Publication Date Title
EP2906882B1 (fr) Refrigerateur avec deux evaporateurs
EP2005076A1 (fr) Procédé pour faire fonctionner un appareil frigorifique à évaporateurs montés en parallèle et appareil frigorifique associé
WO2009141282A2 (fr) Appareil frigorifique à stockage du fluide frigorigène dans le condenseur et procédé correspondant
DE102015112439A1 (de) Kälteanlage
DE102019201427B4 (de) Verfahren zum Betreiben eines Kältemittelkreislaufs einer Kälteanlage eines Fahrzeugs
EP2500676A1 (fr) Pompe à chaleur
WO2016034461A1 (fr) Appareil de froid comprenant plusieurs compartiments de stockage
DE102014100917A1 (de) Kälteanlage
WO2016034446A1 (fr) Appareil frigorifique et machine frigorifique destinée audit appareil
DE102012213644A1 (de) Kältegerät mit automatischer Abtauung
EP1350068B1 (fr) Procede pour reguler un appareil de refroidissement
EP1498673B1 (fr) Système de dégivrage par gaz chaud pour installations de réfrigération
DE102015200728A1 (de) Kombinationskältegerät
WO2017153141A1 (fr) Appareil frigorifique avec compartiment de congélation et circuit de réfrigérant, et procédé de fonctionnement d'un appareil frigorifique
DE19832682C2 (de) Abtaueinrichtung für einen Verdampfer einer Wärmepumpe oder eines Klimageräts
WO2016034443A1 (fr) Appareil frigorifique et machine frigorifique destinée audit appareil
DE102014217674A1 (de) Kältemaschine und Betriebsverfahren dafür
WO2020157010A1 (fr) Appareil frigorifique avec des évaporateurs parallèles et procédé de fonctionnement associé
DE102014211133A1 (de) Kältegerät und Kältemaschine dafür
DE102013011050A1 (de) Kühl- und/oder Gerfriergerät
EP2810003B1 (fr) Appareil réfrigérant à deux compartiments de stockage
DE102014211132A1 (de) Kältegerät und Kältemaschine dafür
DE102011005786A1 (de) Kältegerät
DE102010063384A1 (de) Kältegerät
DE102017000060A1 (de) Kühl- und/oder Gefriergerät

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15759694

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15759694

Country of ref document: EP

Kind code of ref document: A1