WO2019233814A1 - Système de refroidissement - Google Patents

Système de refroidissement Download PDF

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Publication number
WO2019233814A1
WO2019233814A1 PCT/EP2019/063755 EP2019063755W WO2019233814A1 WO 2019233814 A1 WO2019233814 A1 WO 2019233814A1 EP 2019063755 W EP2019063755 W EP 2019063755W WO 2019233814 A1 WO2019233814 A1 WO 2019233814A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling line
cooling
enabling
valve
refrigerant
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/EP2019/063755
Other languages
English (en)
Inventor
Mert PATKAVAK
Funda ERDEM
Sabahattin Hocaoglu
Tolga APAYDIN
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Priority to EP19728365.8A priority Critical patent/EP3803231A1/fr
Publication of WO2019233814A1 publication Critical patent/WO2019233814A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation

Definitions

  • the present invention relates to a cooling system enabling in particular cooling at least two separate compartments to different temperatures.
  • Refrigerators enable in particular food products to be kept cool and thereby their shelf life to be prolonged.
  • Refrigerators generally comprise at least two compartments, namely a cooler and a freezer compartment. Heat drawn from said compartments by means of a refrigerant is discharged to environment and the compartments of a refrigerator are thus cooled.
  • refrigerators generally having two evaporators connected in series, are widely used. Since evaporation temperatures of a cooler compartment and a freezer compartment are identical in this type of a refrigerator, thermodynamic losses are high in the system.
  • Another system used in the state of the art is completely parallel cooling systems. Such systems have a lower compression ratio in the cooler compartment with respect to the freezer compartment, and thereby provide a higher energy performance compared to refrigerators with evaporators connected in series.
  • two separate cooling cycles are achieved by introducing a three-way valve and a second refrigerant line to the condenser outlet. Separate compartments can thus be operated at different evaporation temperatures, thereby enabling increasing the coefficient of performance (COP) of the system.
  • COP coefficient of performance
  • EP1376031 discloses the operation algorithm of a cooling system with parallel cycles.
  • the aim of the present invention is to realize a cooling system enabling in particular cooling separate compartments to different temperatures.
  • Another aim of the present invention is to realize a cooling system with enhanced efficiency.
  • Figure 1 is a schematic view of the cooling system.
  • Cooling system 2. First cooling line 21. First capillary tube 22. First evaporator 3. Second cooling line 31. Second capillary tube 32. Second evaporator 4. Valve 5. Condenser 6. Compressor 7. Control unit
  • the cooling system (1) enabling in particular cooling separate compartments to different temperatures, comprises in its most basic form,
  • the cooling system (1) enabling in particular cooling separate compartments to different temperatures, comprises at least one first cooling line (2) having at least one first capillary tube (21) enabling changing refrigerant pressure and at least one first evaporator (22) enabling heat to be drawn from a first compartment desired to be cooled, and at least one second cooling line (3) having at least one second capillary tube (31) enabling changing refrigerant pressure and at least one second evaporator (32) enabling heat to be drawn from a second compartment desired to be cooled.
  • the first cooling line (2) and the second cooling line (3) can be operated so as to have different evaporation temperatures.
  • the first cooling line (2) may be a cooler compartment of a refrigerator
  • the second cooling line (3) may be a freezer compartment of the refrigerator.
  • To which cooling line (2, 3) the refrigerant is to be sent is determined by means of at least one valve (4) preferably having three-ways, namely one inlet and two outlets.
  • the first cooling line (2) is connected to one outlet of the valve (4) and the second cooling line (3) is connected to the other outlet of the valve (4).
  • the refrigerant returning from the cooling lines (2, 3) is condensed on the condenser (5).
  • the compressor (6) enables pressurizing the refrigerant.
  • the control unit (7) is adapted to activate or to halt the compressor (6).
  • the operating temperature range of a cooling compartment associated with a cooling line is between the highest temperature at which cooling is desired to be initiated and the lowest temperature at which cooling is desired to be halted.
  • the operating temperature of each cooling compartment may be different.
  • the operating temperature of the freezer portion may be -18°C and the cooler compartment may have an operating temperature in the vicinity of 4°C.
  • the temperatures of said compartments are preferably measured by at least one heat sensor.
  • the control unit (7) takes said temperature values into consideration in determining which cooling line is to be activated and for how long, and enables the valve (4) to be switched to the position to activate the desired cooling line.
  • the control unit (7) positions the valve (4) according to the next cooling line (2, 3) to be activated in the halting process of the compressor (6).
  • refrigerant pressure does not drop during activation of the next cooling line (2, 3), thereby minimizing performance losses of the system.
  • Chart 1 displays an example regarding to which position the control unit (7) will switch the valve (5) and for how long it will continue operation of the compressor (6), according to the currently operating cooling line (2,3) and the next cooling line (2,3) to be activated.
  • Cooling Line Next Cooling Line Valve Position Operating Duration 1. cooling line 1. cooling line 1. cooling line T 1. cooling line 2. cooling line 2. cooling line Y Off Z 2. cooling line 2. cooling line 2. cooling line X 2. cooling line 1. cooling line 1. cooling line M
  • Chart 1 Valve positions and compressor operating durations according to operating sequence of the cooling lines.
  • the valve (4) is switched to the first cooling line (2) position and pressure is equalized for a duration of T. If the second cooling line (3) is to be activated after operation of the first cooling line (2), the valve (4) is switched to the second cooling line (3) position and pressure is equalized for a duration of Y. Then, the valve (4) is switched to an off position for both of the cooling lines (2, 3), and the refrigerant in the evaporator (22) of the first cooling line (2) is enabled to be collected in the condenser (5) for a duration of Z. This step may be referred to as the collection step.
  • the valve (4) is switched to the second cooling line (3) position and pressure is equalized for a duration of X. If the first cooling line (2) is to be activated after operation of the second cooling line (3), the valve (4) is switched to the first cooling line (2) position and pressure is equalized for a duration of M.
  • the above-given operations are solely an example of operation of the cooling system (1) of the invention. Different valve (4) positions can be used in different applications.
  • the number of cooling lines (2, 3) can be increased within the framework of the above-disclosed operation principles.
  • a third cooling line can be introduced, whose operating temperature range differs than that of the first cooling line (2) and the second cooling line (3).
  • the number of valve (4) positions should be increased as well.

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)

Abstract

La présente invention concerne un système de refroidissement (1) permettant notamment de refroidir des compartiments séparés à des températures différentes. Le système de refroidissement (1) de la présente invention est caractérisé à ce que l'unité de commande (7) soit conçue pour positionner la valve (4) en fonction de la conduite de refroidissement suivante (2, 3) afin d'activer et de permettre au compresseur (6) de s'activer pendant encore une durée prédéterminée une fois que le fonctionnement dans la conduite de refroidissement actuellement en fonctionnement (2, 3) soit terminé.
PCT/EP2019/063755 2018-06-05 2019-05-28 Système de refroidissement Ceased WO2019233814A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19728365.8A EP3803231A1 (fr) 2018-06-05 2019-05-28 Système de refroidissement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201807951 2018-06-05
TRA2018/07951 2018-06-05

Publications (1)

Publication Number Publication Date
WO2019233814A1 true WO2019233814A1 (fr) 2019-12-12

Family

ID=66752074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/063755 Ceased WO2019233814A1 (fr) 2018-06-05 2019-05-28 Système de refroidissement

Country Status (2)

Country Link
EP (1) EP3803231A1 (fr)
WO (1) WO2019233814A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111913099A (zh) * 2020-10-13 2020-11-10 天津金海通自动化设备制造有限公司 一种制冷模块、测试设备的温控装置及温控方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106943A2 (fr) * 1999-11-30 2001-06-13 Kabushiki Kaisha Toshiba Réfrigérateur
EP1376031A2 (fr) 2002-06-26 2004-01-02 Lg Electronics Inc. Procédé de commande de l'opération d'un système de refroidissement avec deux évaporateurs
US20100131107A1 (en) * 2007-03-30 2010-05-27 Yong Hwan Eom Controlling process for refrigerator
US20110146303A1 (en) * 2009-12-22 2011-06-23 Samsung Electronics Co., Ltd. Refrigerator and method of controlling operation thereof
WO2013091691A1 (fr) 2011-12-21 2013-06-27 Electrolux Home Products Corporation N.V. Procédé de commande d'un système de réfrigération et système de réfrigération associé
US20170003064A1 (en) * 2015-07-02 2017-01-05 Samsung Electronics Co., Ltd. Refrigerator and method for controlling the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106943A2 (fr) * 1999-11-30 2001-06-13 Kabushiki Kaisha Toshiba Réfrigérateur
EP1376031A2 (fr) 2002-06-26 2004-01-02 Lg Electronics Inc. Procédé de commande de l'opération d'un système de refroidissement avec deux évaporateurs
US20100131107A1 (en) * 2007-03-30 2010-05-27 Yong Hwan Eom Controlling process for refrigerator
US20110146303A1 (en) * 2009-12-22 2011-06-23 Samsung Electronics Co., Ltd. Refrigerator and method of controlling operation thereof
WO2013091691A1 (fr) 2011-12-21 2013-06-27 Electrolux Home Products Corporation N.V. Procédé de commande d'un système de réfrigération et système de réfrigération associé
US20170003064A1 (en) * 2015-07-02 2017-01-05 Samsung Electronics Co., Ltd. Refrigerator and method for controlling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111913099A (zh) * 2020-10-13 2020-11-10 天津金海通自动化设备制造有限公司 一种制冷模块、测试设备的温控装置及温控方法
CN111913099B (zh) * 2020-10-13 2021-01-08 天津金海通自动化设备制造有限公司 一种测试设备的温控装置及温控方法

Also Published As

Publication number Publication date
EP3803231A1 (fr) 2021-04-14

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