EP3417213A1 - Appareil de froid pourvu d'une pluralité de compartiments de stockage - Google Patents

Appareil de froid pourvu d'une pluralité de compartiments de stockage

Info

Publication number
EP3417213A1
EP3417213A1 EP17702099.7A EP17702099A EP3417213A1 EP 3417213 A1 EP3417213 A1 EP 3417213A1 EP 17702099 A EP17702099 A EP 17702099A EP 3417213 A1 EP3417213 A1 EP 3417213A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
storage chamber
line section
refrigerating appliance
appliance according
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
EP17702099.7A
Other languages
German (de)
English (en)
Other versions
EP3417213B1 (fr
Inventor
Andreas BABUCKE
Niels Liengaard
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 EP3417213A1 publication Critical patent/EP3417213A1/fr
Application granted granted Critical
Publication of EP3417213B1 publication Critical patent/EP3417213B1/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
    • 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
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same 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
    • 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
    • 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
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/062—Capillary expansion 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/052—Compression system with heat exchange between particular parts of the system between the capillary tube and another part 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/054—Compression system with heat exchange between particular parts of the system between the suction tube of the compressor and another part of the 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator

Definitions

  • the present invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, with a plurality of storage chambers, which are operable at different temperatures.
  • a refrigeration device with a plurality of storage chambers in which a first throttle point, a first heat exchanger for controlling the temperature of the first storage chamber, a second throttle point and a second heat exchanger for cooling the second storage chamber are connected in series in a refrigerant circuit.
  • the pressure drop at the second throttle point causes a pressure difference between the two heat exchangers, so that the evaporation temperature of the refrigerant in the second heat exchanger is lower than in the first and thus in the second storage chamber, a lower operating temperature can be set than in the first.
  • the first heat exchanger can work as an evaporator or as a condenser. When operating as a condenser, the operating temperature of the first storage chamber may be at room temperature or even slightly higher.
  • Object of the present invention is to provide a refrigeration device with a plurality of storage chambers, which allows energy-efficient operation even if a high and a second storage chamber a low operating temperature is selected for a first storage chamber.
  • the object is achieved by a first controllable throttle point, a first heat exchanger for controlling the temperature of the first storage chamber, a second controllable throttle point and a second in a refrigeration device having at least a first and a second storage chamber and a refrigerant circuit in which between a pressure port and a suction port Heat exchangers for cooling the second storage chamber are connected in series, at least one upstream of the second heat exchanger located hot line section and a downstream of the second heat exchanger located cold line section are guided in thermal contact with each other to form an inner heat exchanger, and the first heat exchanger, bypassing the warm line section is connected to the pressure port.
  • an energy-efficient cooling operation is ensured for the second storage chamber;
  • it is avoided to extract heat from the refrigerant already before reaching the first heat
  • the warm line section of the inner heat exchanger is located between the first heat exchanger and the second heat exchanger.
  • Upstream of the second heat exchanger may be provided a shunt leg which includes a third controllable choke point and a third heat exchanger.
  • the warm line section may also be located in the shunt line branch.
  • the third heat exchanger is located there upstream of the third heat exchanger to allow there an energy-efficient cooling operation.
  • the bypass line branch downstream of the third heat exchanger and upstream of a fourth controllable throttle point.
  • refrigerant vapor extracted from the second heat exchanger can first be warmed up in the second inner heat exchanger before it reaches the first inner heat exchanger.
  • the cooling achieved by the compressed refrigerant in the first internal heat exchanger is therefore less than if the second internal heat exchanger were absent or connected behind the first heat exchanger; It can thereby be prevented that, when the refrigeration requirement of the second storage chamber is long-lasting, a storage chamber cooled by the third heat exchanger cools more than desired.
  • an expansion valve can be provided.
  • a controllable throttle point may be formed by at least two parallel line branches and a valve for controlling the distribution of the refrigerant on the line branches.
  • one of the parallel line branches may comprise a capillary.
  • Fig. 2 is an illustration of a refrigerant circuit according to a second
  • Fig. 3 shows a detail of a refrigerant circuit according to a third embodiment of
  • the refrigerant circuit shown in Fig. 1 comprises a 1 with a pressure port 2 and a suction port 3.
  • a flowing from the pressure port 2 refrigerant pipe 4 extends in the direction of circulation of the refrigerant via a condenser 5 to a branch 6 and divides there into two branches 7, 8th ,
  • the branch 7 extends over a first controllable restriction 9, e.g. an expansion valve, a heat exchanger 10 and a second controllable orifice 1 1 to a confluence 12.
  • a third controllable orifice 13, a heat exchanger 14 and a fourth controllable orifice 15 are connected in series; at the confluence 12, the branches 7, 8 meet again.
  • the refrigerant line 4 extends via a heat exchanger 16 to the suction port 3 of the compressor. 1
  • the heat exchangers 10, 16, 14 are each surrounded by a common insulating sheath 20 together with a first storage chamber 17, a second storage chamber 18 and a third storage chamber 19 of the refrigerator.
  • the sections 21, 22 may be superficially soldered to each other, or the warm portion 22 may be wound around the portion 21 or extend in the interior of the cold portion 21 to give off heat to the refrigerant flowing in the cold section 21 refrigerant vapor.
  • Another internal heat exchanger 24 comprises a hot section 25, which is located upstream of the third controllable throttling point 13 and belongs to the branch 8, and a cold section 26 located downstream of the evaporator 16 in the refrigerant line 4.
  • the section 26 lies downstream from the section 21 of the inner heat exchanger 23; but he could also lie upstream of this or overlap with it.
  • An electronic control unit 27 is connected to temperature sensors 28 in the three storage chambers 17, 18, 19 and controls the speed of the compressor 1 and the pressure drops at the controllable throttle points 9, 1 1, 13, 15 based on a comparison of the in the storage chambers 17, 18th , 19 prevailing temperatures with user setpoints.
  • the adjustable setpoint can be above the ambient temperature; then the pressure drop at the throttle point 9 is minimal, the heat exchanger 10 operates as a condenser.
  • the refrigerant After passing through the heat exchanger 10 and before reaching the controllable throttle point 1 1, the refrigerant is pre-cooled in the inner heat exchanger 23 before it reaches the heat exchanger 16 of the storage chamber 18. Since the pressure in the heat exchanger 16 is necessarily lower than in the heat exchangers 10 and 14, the heat exchanger 16 always works as an evaporator, and the temperature of the storage chamber 18 is lower than that of the storage chambers 17, 19th
  • the control unit 27 sets the pressure drop in the throttle bodies 9 to a non-zero value. The higher this is, and consequently the lower the temperature of the storage chamber 17, the lower the temperature of the refrigerant at the outlet of the heat exchanger 10, and the lower the heat exchange in the inner heat exchanger 23.
  • the portion 25 of the inner heat exchanger 24 of the controllable throttle body 13 and the heat exchanger 14 upstream, so that the circulating through this section 25 refrigerant emits heat before reaching the heat exchanger 14.
  • Temperatures above the ambient temperature are therefore difficult to achieve in the storage chamber 19, but this is not necessary because the storage chamber 17 is available for storage at elevated temperature.
  • FIG. 2 shows a second embodiment of the refrigerating appliance according to the invention.
  • a control unit and temperature sensors in the bearing chambers 17, 18, 19 are present here in the same way as in the first embodiment, but are not shown in the figure for the sake of clarity.
  • the other components largely correspond to those of FIG. 1; a difference lies in the arrangement of the inner heat exchanger.
  • the inner heat exchanger 24 of Fig. 1 is also identical in Fig. 2, but the inner heat exchanger 21 is replaced by an inner heat exchanger 30, in which a portion 31 of the branch 8, between the outlet of the heat exchanger 14 and the controllable throttle point 15 is in thermal contact with the section 21.
  • the branch 7 thus has no inner heat exchanger, the branch 8 instead of two. Surprisingly, this construction proves to be particularly efficient in practice.
  • the reason is that the refrigerant flow rate on the branch 8 is normally much larger than on the branch 7; even if long running times of the compressor 1 to uninterrupted operation are required to keep the storage chamber 18 at its desired temperature or the compressor 1 is even operated speed controlled causes the fact that the refrigerant vapor, with the compressed refrigerant in the inner heat exchanger 24th is brought into thermal contact, has already been preheated in the inner heat exchanger 29, a subcooling of the storage chamber 19.
  • Fig. 3 shows a section of the refrigerant circuit according to a modification, both in the arrangement of the inner heat exchanger of FIG. 1 as shown in FIG.
  • the controllable throttle point 9 is not designed here as an expansion valve, but it comprises a parallel connection of two line branches 31, 32, of which one, 31, a capillary 33 and the other, 32, a check valve 34 includes.
  • a check valve 34 When the check valve 34 is open, substantially all of the refrigerant circulating on the branch 7 flows through the check valve 34, and the influence of the capillary 33 on the pressures and flows in the refrigerant circuit is negligible.
  • the pressure in the heat exchanger 10 is then virtually identical to that in the condenser 5, and the storage chamber 17 can be operated above ambient temperature as described above.
  • the shut-off valve 34 is closed, then the refrigerant in the branch 7 can flow only through the capillary 33, and in the heat exchanger 10 is a low pressure and a correspondingly low temperature.
  • a portion of the capillary 33 or an upstream portion 35 of the conduit branch 31 may be incorporated into the interior heat exchanger 24 to facilitate more efficient cooling operation of the storage compartment 17. Since the flow of refrigerant through the capillary 33 is negligible when the shut-off valve 34 is open, this inclusion has no influence on the possibility of achieving high temperatures in the storage chamber 17.
  • the capillary 33 may be replaced by an expansion valve.
  • the controllable throttle points 1 1, 13, 15 may, if desired, also have the structure shown in Fig. 3 for the throttle body 9.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

Appareil de froid comprenant au moins un premier compartiment de stockage (17), un second compartiment de stockage (18) et un circuit frigorifique dans lequel un premier site d'étranglement commandable (9) situé entre un raccord de pression (2) et un raccord d'aspiration (3), un premier échangeur de chaleur (10) pour la mise en température du premier compartiment de stockage (17), un second site d'étranglement commandable (11) et un second échangeur de chaleur (16) pour refroidir le second compartiment de stockage (18) sont reliés en série. Au moins un segment de conduit (22, 26, 30) chaud situé en amont du second échangeur de chaleur (16) et un segment de conduit (21, 25) froid situé en aval du second échangeur de chaleur (16) sont amenés en contact thermique l'un avec l'autre, pour former un échangeur de chaleur interne (23, 24, 29), et le premier échangeur de chaleur (10) est relié au raccord de pression (2) et contourne le segment de conduit (22, 26, 30) chaud.
EP17702099.7A 2016-02-19 2017-01-31 Appareil de froid pourvu d'une pluralité de compartiments de stockage Active EP3417213B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016202565.1A DE102016202565A1 (de) 2016-02-19 2016-02-19 Kältegerät mit mehreren Lagerkammern
PCT/EP2017/051971 WO2017140488A1 (fr) 2016-02-19 2017-01-31 Appareil de froid pourvu d'une pluralité de compartiments de stockage

Publications (2)

Publication Number Publication Date
EP3417213A1 true EP3417213A1 (fr) 2018-12-26
EP3417213B1 EP3417213B1 (fr) 2023-10-04

Family

ID=57914987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17702099.7A Active EP3417213B1 (fr) 2016-02-19 2017-01-31 Appareil de froid pourvu d'une pluralité de compartiments de stockage

Country Status (5)

Country Link
US (1) US11092376B2 (fr)
EP (1) EP3417213B1 (fr)
CN (1) CN108700349B (fr)
DE (1) DE102016202565A1 (fr)
WO (1) WO2017140488A1 (fr)

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CN112303944A (zh) 2019-07-31 2021-02-02 特灵国际有限公司 用于控制来自过冷却器的过热的***和方法
DE102019216582A1 (de) * 2019-10-28 2021-04-29 BSH Hausgeräte GmbH Kältegerät mit heiz- und kühlbarem Fach
DE102019218352A1 (de) * 2019-11-27 2021-05-27 BSH Hausgeräte GmbH Kältegerät mit variabel nutzbarem Fach
DE102020207648A1 (de) 2020-06-22 2021-12-23 BSH Hausgeräte GmbH Kältegerät mit einem Saugrohr-Wärmetauscher und Verfahren zum Betrieb eines Kältegeräts mit einem Saugrohr-Wärmetauscher

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Also Published As

Publication number Publication date
EP3417213B1 (fr) 2023-10-04
CN108700349A (zh) 2018-10-23
DE102016202565A1 (de) 2017-08-24
US11092376B2 (en) 2021-08-17
CN108700349B (zh) 2021-01-12
US20190032986A1 (en) 2019-01-31
WO2017140488A1 (fr) 2017-08-24

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