EP3426989A1 - Appareil frigorifique avec compartiment de congélation et circuit de réfrigérant, et procédé de fonctionnement d'un appareil frigorifique - Google Patents

Appareil frigorifique avec compartiment de congélation et circuit de réfrigérant, et procédé de fonctionnement d'un appareil frigorifique

Info

Publication number
EP3426989A1
EP3426989A1 EP17705407.9A EP17705407A EP3426989A1 EP 3426989 A1 EP3426989 A1 EP 3426989A1 EP 17705407 A EP17705407 A EP 17705407A EP 3426989 A1 EP3426989 A1 EP 3426989A1
Authority
EP
European Patent Office
Prior art keywords
evaporator
compressor
refrigerant
switching
phase
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Withdrawn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
EP17705407.9A
Other languages
German (de)
English (en)
Inventor
Hans Ihle
Berthold Pflomm
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 EP3426989A1 publication Critical patent/EP3426989A1/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Withdrawn legal-status Critical Current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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/26—Problems to be solved characterised by the startup of the refrigeration cycle
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator

Definitions

  • Refrigerating appliance with a freezer and a refrigerant circuit
  • the present invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, with a freezer compartment and a refrigerant circuit and a method for operating such a refrigeration appliance, and more particularly to the construction of a refrigerator which can be used in such a refrigeration appliance.
  • 1 133 is a refrigerator with a first and a second evaporator, which are arranged together with each upstream throttle in mutually parallel branches of a refrigerant circuit, wherein at the outlet of the second evaporator, a check valve is arranged, and in one embodiment the first evaporator upstream of the first evaporator is switchable between a high and a low flow rate, the supply line to both the
  • Throttle is shut off.
  • the evaporators are operated successively in time at different evaporation pressures and thus evaporation temperatures.
  • a check valve is used to avoid a displacement of refrigerant from the warmer evaporator in the freezer evaporator in a standstill of a compressor.
  • DE 10 2014 21 1 132 discloses a chiller comprising a first and a second evaporator, which are arranged together with each upstream throttle point in parallel branches of a refrigerant circuit.
  • a downstream valve arrangement disposed between outlets of the two evaporators and a suction port of a compressor is switchable between a position in which it allows a flow of refrigerant from the first evaporator to the compressor and blocks a flow of the refrigerant from the first to the second evaporator in a position it blocks a flow from the first evaporator to the compressor.
  • the supply line to both the throttling points can not be shut off.
  • a refrigerating machine for a household refrigerating appliance comprising a compressor a condenser, a first and a second evaporator which are arranged together with a respective upstream throttle in mutually parallel branches of a refrigerant pipe, and an upstream valve arrangement for selectively interrupting the branches respectively upstream of its evaporator.
  • a control unit is arranged to detect an underfill of at least a first one of the evaporators and to operate the compressor in the event of an underfill while the upstream valve arrangement interrupts the branch of the second evaporator.
  • the conventional check valve described above is here replaced by a stop valve. The supply line to both the throttling points can not be shut off.
  • Object of the present invention is to provide a refrigerator with a freezer and an operating method for this, which allows a reliable energy-efficient operation with an optimal amount of refrigerant in the evaporator.
  • a stop valve upstream of a restriction controls a two-phase mixture of the refrigerant, with a pipe diameter in the valve corresponding to a capillary diameter.
  • a gas valve downstream of an evaporator switches the evaporated gaseous refrigerant, therefore, the gas valve preferably has a pipe diameter of a suction pipe.
  • Such gas valves are unusual in household refrigerators and therefore relatively expensive, which in turn precludes their use. In the present invention, however, such a gas valve is used in combination to be able to control the refrigerant level in the evaporator with a stop valve in front of the evaporator.
  • the technical advantage is achieved that depends on the ambient conditions such as outside temperature or
  • Refrigerant quantity can be controlled.
  • a control unit (19) which is adapted to control the compressor, the stop valve and the gas valve.
  • the method steps a) switching of the compressor take place in any order; b) switching a stop valve in front of a first evaporator; c) switching a gas valve after the first evaporator.
  • a defrosting phase of the first evaporator is switched by the method steps a1) switching off the compressor; b1) opening the stop valve; c1) closing the gas valve.
  • a warm start phase of the refrigeration device is switched by the method steps a2) switching on the compressor; b2) opening the stop valve; c2) Alternating opening and closing of the gas valve.
  • Refrigerant distribution in the evaporator is more uniform than in other measures.
  • a low-noise phase or a rapid cooling phase of the first evaporator is switched by the method steps a3) switching on of the compressor; b3) closing the stop valve; c3) opening the
  • the technical advantage is achieved that quite deliberately refrigerant can be brought to the condenser side by e.g. to achieve acoustic effects.
  • the warmer evaporator has a higher operating temperature during operation than the first evaporator in operation.
  • the actual temperature of the first evaporator may be higher than that of the second evaporator, but this is usually not the operating temperature of the first evaporator, since it is not in operation during defrosting.
  • a directional control valve is preferably used to supply the desired throttle point with refrigerant.
  • the stop valve can be arranged as a separate stop valve in front of the directional control valve or the stop valve can be integrated with the directional control valve as a stop valve with directional function or directional control valve with stop function.
  • the refrigeration device has a second evaporator, wherein the second evaporator is preceded by a second capillary.
  • a refrigerant supply phase is switched by the process steps a4) switching on the compressor; b4) closing the stop valve; c4) opening the gas valve.
  • Performance requirements in a compartment determined from the typically available information of the associated compartment and evaporator temperature sensor. In this situation, an "extra portion" of refrigerant is withdrawn from one of the other evaporators and provided to the needy compartment for full use of the given evaporator area.
  • the refrigerant supply phase is initiated after detection of an introduction of warm goods in the freezer.
  • the technical advantage is achieved that influencing the storage temperature of the already existing product is influenced as little as possible by the added commodity.
  • the refrigerant supply phase is initiated after a request for ice making.
  • the technical advantage is achieved that the knowledge to use much "cold" for an ice-making in a compartment with an automatic icemaker, can be used efficiently.
  • a further refrigerant supply phase is switched after a working phase of the compressor.
  • an evaporator-emptying phase is switched by the method steps a4) switching on the compressor; b4) closing the stop valve; c4) opening the gas valve; d) removing the entire refrigerant from the second evaporator; e) then defrost the first
  • the technical advantage is achieved that, prior to a defrost, the warmer evaporator can be intentionally emptied of liquid refrigerant fractions in order to avoid vaporization of refrigerant and associated cooling of a portion of the evaporator. This typically affects the
  • the evaporator is a vertical tube-on-sheet evaporator.
  • the technical advantage is achieved that the case of a vertical tube-on-sheet evaporator
  • a switchable gas valve can be used in combination with a stop valve in front of the
  • Throttles in refrigerators with two or more evaporators a parallel circuit of the evaporator - either the one operated or the other - allow and thereby prevent the above-mentioned refrigerant displacements instead of the mechanical check valve shown in the prior art.
  • an electrically switchable gas valve can reliably prevent inflow of refrigerant via the compressor evaporator side of the colder evaporator regardless of operating times or evaporating pressures of the warmer compartment.
  • a gas valve can also be used to deliberately move or hold refrigerant in convenient areas of the refrigeration system in single or multi-zone refrigerated Nofrostieri, especially after a defrosting phase and thus high or high
  • FIG. 1 is a schematic representation of a refrigeration device according to the invention
  • Fig. 2 is a schematic representation of the refrigerant circuit of a
  • Refrigerating appliance according to the invention with a first evaporator
  • Fig. 3 is a schematic representation of the refrigerant circuit of a
  • inventive refrigeration device with a first evaporator and another warmer evaporator
  • Fig. 5 is a flowchart of another embodiment of the invention.
  • Fig. 1 shows a refrigerator representative of a refrigerator 10 with a refrigerator compartment door 12 to a refrigerator compartment and a freezer compartment door 14 to a freezer.
  • the refrigerator is used to refrigerate food, and includes a refrigerated compartment storage chamber cooled by a refrigerator compartment evaporator and a freezer storage compartment cooled by a freezer compartment evaporator.
  • the refrigerant circuit 20 shown in FIG. 2 includes a conventional manner
  • Compressor 21 having a compressed refrigerant outlet 22 and an inlet 23 for sucking refrigerant. At one of the output 22 outgoing
  • Refrigerant line 24, a condenser 25, a dryer 26, and a switchable between an on-state and a blocking state stop valve 27 are arranged in order.
  • the stop valve 27 is followed by a capillary 31 and an evaporator 33 in series.
  • Evaporator 33 cools a compartment 34 of a refrigerator 35. After the evaporator 33 is an electrically controllable gas valve 36 in a suction line 37 to the compressor 21st
  • An electronic control unit 40 is connected to a temperature sensor 42 on the compartment 34 in order to determine the operation of the temperature based on the temperatures measured there
  • the refrigerant circuit 50 shown in FIG. 3 largely comprises the same elements as the refrigeration cycle 20 of FIG. 2 with the same reference numerals.
  • the refrigerant circuit 50 comprises a compressor 21, a refrigerant line 24 and a condenser 25, a dryer 26, and a stop valve 27 in sequence.
  • a directional control valve 52 follows, at which the refrigerant line 24 into two branches 59, 60 branched. Deviating from the illustration of FIG.
  • the directional control valve 52 may be integrated in the stop valve 27, 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 the condenser 25 with the branch 59 and in the other with the branch 60 connects, and in the locked state to any of the branches 59, 60 is a connection.
  • each of the two evaporators 63, 64 cools a compartment 65 or 66 of the refrigerator.
  • the mean operating temperature of the compartment 66 is higher than that of compartment 65, for example compartment 66 may be a standard refrigeration compartment and compartment 65 may be a freezer compartment of the refrigeration apparatus.
  • the two branches 59, 60 meet again at a confluence 67.
  • a gas valve 68 is arranged between an exit of the evaporator 63 and the confluence 67. The gas valve 68 allows in the open position the
  • the evaporator 63 In the closed position, it includes on the one hand refrigerant in the evaporator 63 and on the other hand prevents refrigerant, which evaporates during a standstill of the compressor in the evaporator 64 of the warmer cooling compartment diffuses into the evaporator of the colder freezer compartment and condenses there.
  • An electronic control unit 69 is connected to temperature sensors 70, 71 to the
  • Compartments 65, 66 connected to control the operation of the compressor 21 and the position of the stop valve 27 and directional control valve 52 based on the temperatures measured there.
  • the method according to the invention will be explained with reference to FIGS. 2 and 3, in which the evaporators 33 and 63 are referred to as the first evaporator and the evaporator 64 as the second evaporator.
  • 4 shows, in flowchart 80, a method for operating a refrigerant circuit in a refrigerator with a freezer with the method steps
  • a warm start phase of the refrigeration device is switched by the method steps
  • a low-noise phase or a rapid cooling phase of the first evaporator is switched by the method steps a3) switching on of the compressor;
  • a refrigerant supply phase is switched by the method steps
  • the refrigerant preparation phase is further initiated after detecting the introduction of warm goods in the freezer compartment.
  • the refrigerant supply phase is initiated after a request for ice making.
  • a further refrigerant supply phase is switched after a working phase.
  • FIG. 4 shows in flow diagram 90 an embodiment of the method for operating a refrigerant circuit in a refrigeration device having a freezer compartment, wherein the refrigeration device has a second evaporator in the refrigerant circuit parallel to the first evaporator.
  • an evaporator-emptying phase is switched by the process steps a4) switching 91 of the compressor;
  • the evaporator is a vertical tube-on-sheet evaporator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Defrosting Systems (AREA)

Abstract

Dans un appareil frigorifique avec compartiment de congélation et circuit de réfrigérant qui comprend un compresseur (21) et un premier évaporateur (33, 63), une soupape d'arrêt (36, 67) et un premier capillaire (31, 61) étant placés en amont du premier évaporateur, une soupape à gaz (68) est placée en aval du premier évaporateur (33, 63). L'invention concerne également un procédé permettant de faire fonctionner un circuit de réfrigérant dans un appareil frigorifique avec compartiment de congélation, ledit procédé comprenant les étapes suivantes, dans n'importe quel ordre, consistant à : a) commuter (81) le compresseur ; b) commuter (82) une soupape d'arrêt avant un premier évaporateur ; c) commuter (83) une soupape à gaz après le premier évaporateur.
EP17705407.9A 2016-03-09 2017-02-16 Appareil frigorifique avec compartiment de congélation et circuit de réfrigérant, et procédé de fonctionnement d'un appareil frigorifique Withdrawn EP3426989A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016203895.8A DE102016203895A1 (de) 2016-03-09 2016-03-09 Kältegerät mit einem Gefrierfach und einem Kältemittelkreis und Verfahren zum Betrieb eines Kältegeräts
PCT/EP2017/053465 WO2017153141A1 (fr) 2016-03-09 2017-02-16 Appareil frigorifique avec compartiment de congélation et circuit de réfrigérant, et procédé de fonctionnement d'un appareil frigorifique

Publications (1)

Publication Number Publication Date
EP3426989A1 true EP3426989A1 (fr) 2019-01-16

Family

ID=58046684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17705407.9A Withdrawn EP3426989A1 (fr) 2016-03-09 2017-02-16 Appareil frigorifique avec compartiment de congélation et circuit de réfrigérant, et procédé de fonctionnement d'un appareil frigorifique

Country Status (4)

Country Link
EP (1) EP3426989A1 (fr)
CN (1) CN108700348A (fr)
DE (1) DE102016203895A1 (fr)
WO (1) WO2017153141A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201291A1 (de) * 2019-02-01 2020-08-06 BSH Hausgeräte GmbH Kältegerät mit parallelen Verdampfern und Betriebsverfahren dafür
CN110671855A (zh) * 2019-10-10 2020-01-10 海信（山东）冰箱有限公司 一种冷柜
CN114719515B (zh) * 2021-01-04 2024-03-12 青岛海尔电冰箱有限公司 冰箱的控制方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4648247A (en) * 1984-10-24 1987-03-10 Sanyo Electric Co Low-temperature showcase
US4660384A (en) * 1986-04-25 1987-04-28 Vilter Manufacturing, Inc. Defrost apparatus for refrigeration system and method of operating same
IT1192083B (it) * 1986-05-20 1988-03-31 Zanussi Elettrodomestici Circuito frigorifero con compressore rotativo
JPH07120121A (ja) * 1993-10-29 1995-05-12 Daikin Ind Ltd 空気調和装置の運転制御装置
JPH07248164A (ja) * 1994-03-11 1995-09-26 Matsushita Refrig Co Ltd 冷凍装置
JPH0828969A (ja) * 1994-07-15 1996-02-02 Sanyo Electric Co Ltd 冷却装置
US6067815A (en) * 1996-11-05 2000-05-30 Tes Technology, Inc. Dual evaporator refrigeration unit and thermal energy storage unit therefore
DE102008042909A1 (de) * 2008-10-16 2010-04-22 BSH Bosch und Siemens Hausgeräte GmbH Kühl- und/oder Gefriergerät sowie Verfahren zur Regelung eines solchen Kühl- und/oder Gefriergerätes
BRPI1005090A2 (pt) * 2010-12-10 2013-04-02 Whirlpool Sa mÉtodos de controle de compressor com dupla sucÇço para sistemas de refrigeraÇço
US20130025304A1 (en) * 2011-07-27 2013-01-31 Dorman Dennis R Loading and unloading of compressors in a cooling system
DE102012218345A1 (de) * 2012-10-09 2014-04-10 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit zwei Verdampfern
DE102014223460A1 (de) * 2014-02-27 2015-08-27 BSH Hausgeräte GmbH Kältegerät
DE102014211132A1 (de) 2014-06-11 2015-12-17 BSH Hausgeräte GmbH Kältegerät und Kältemaschine dafür
DE102014211133A1 (de) 2014-06-11 2015-12-17 BSH Hausgeräte GmbH Kältegerät und Kältemaschine dafür

Also Published As

Publication number Publication date
WO2017153141A1 (fr) 2017-09-14
DE102016203895A1 (de) 2017-09-14
CN108700348A (zh) 2018-10-23

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