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EP3830503B1 - Abtausystem und verfahren zum abtauen eines verdampferteils eines temperiergeräts - Google Patents

Abtausystem und verfahren zum abtauen eines verdampferteils eines temperiergeräts Download PDF

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Publication number
EP3830503B1
EP3830503B1 EP19749138.4A EP19749138A EP3830503B1 EP 3830503 B1 EP3830503 B1 EP 3830503B1 EP 19749138 A EP19749138 A EP 19749138A EP 3830503 B1 EP3830503 B1 EP 3830503B1
Authority
EP
European Patent Office
Prior art keywords
heating element
refrigerant inlet
sensing device
evaporator section
ice
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.)
Active
Application number
EP19749138.4A
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English (en)
French (fr)
Other versions
EP3830503A1 (de
Inventor
Jason R. KONDRK
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.)
Carrier Corp
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Carrier Corp
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Publication date
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Publication of EP3830503A1 publication Critical patent/EP3830503A1/de
Application granted granted Critical
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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D21/02—Detecting the presence 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/003—Transport containers
    • 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
    • F25D21/02—Detecting the presence of frost or condensate
    • F25D21/025—Detecting the presence of frost or condensate using air pressure differential detectors
    • 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

Definitions

  • JP 2013 079783 A relates to a cooling device provided with a heater for defrosting frost adhering to a cooler.
  • the invention provides a method of defrosting an evaporator section of a temperature control unit including means for dedicated defrosting of ice at a refrigerant inlet of the evaporator section, the method comprising: detecting the presence of ice buildup at a first location proximate a the refrigerant inlet of the evaporator section with a first sensing device that is located proximate the refrigerant inlet; detecting the presence of ice buildup at a second location of the evaporator section with a second sensing device, wherein the second sensing device is located further from the refrigerant inlet than the distance between the first sensing device and the refrigerant inlet; activating a first heating element upon detection of the presence of ice buildup at the first location, the first heating element being dedicated to ice defrosting at the refrigerant inlet; and activating a second heating element upon detection of the presence of ice buildup at the second location; wherein the first heating
  • FIG. 2 illustrates a temperature glide for three different refrigerants.
  • a HFC refrigerant 20, such as R404a or the like is shown to have a low temperature glide, which refers to the slope of the plot of temperature vs. entropy.
  • a HFC "lower GWP" 30 such as R452a or the like has a slightly higher temperature glide, relative to the HFC refrigerant 20.
  • a low GWP refrigerant 40 has a high temperature glide, relative to refrigerants 20 and 30. This illustrates that the low GWP refrigerant 40 has a substantially lower temperature at the inlet of the evaporator section, when compared to the evaporator section outlet temperature. Such a glide results in ice formation at the inlet more frequently than ice formation at the outlet and intermediate locations therebetween.
  • the first heating element(s) 80 are electric heaters separately controlled based on the distinct sensing device 60, 70 and with separate contactors 84.
  • the heating elements 80, 82 radiate heat to melt ice.
  • the first heating element(s) 80 is activated when the first sensing device 60 detects the presence of ice formation proximate the inlet 54.
  • the second heating element(s) 82 is activated when the second sensing device 70 detects the presence of ice formation further from the inlet 54. Unlike the first heating element activation, activation of the second heating element 82 requires a full defrost cycle to be initiated.

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  • 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)
  • Defrosting Systems (AREA)

Claims (12)

  1. Abtausystem für ein Temperiergerät (10), wobei das Abtausystem umfasst:
    einen Verdampferabschnitt (50) mit einem Kältemitteleinlass (54) und einem Kältemittelauslass, wobei das Abtausystem dazu dient, das Abtauen von Eis (72) zu ermöglichen, das sich nur am Kältemitteleinlass befindet;
    ein erstes Heizelement (80), das dem Eisabtauen am Kältemitteleinlass dient;
    ein zweites Heizelement (82), wobei sich das erste Heizelement näher am Kältemitteleinlass befindet als sich das zweite Heizelement am Kältemitteleinlass befindet;
    wobei das erste Heizelement vertikal zu dem Verdampferabschnitt ausgerichtet ist, das zweite Heizelement entlang einer Längsrichtung des Verdampferabschnitts ausgerichtet ist;
    eine erste Erfassungsvorrichtung (60), die sich in der Nähe des Kältemitteleinlasses befindet und zur Erkennung von Eisbildung am Kältemitteleinlass dient, wobei die Heizaktivierung des ersten Heizelements mindestens teilweise durch die Eisbildungserkennung der ersten Erfassungsvorrichtung bestimmt wird; und
    eine zweite Erfassungsvorrichtung (70), die sich weiter von dem Kältemitteleinlass entfernt als der Abstand zwischen der ersten Erfassungsvorrichtung und dem Kältemitteleinlass befindet und zum Erkennen von Eisbildung entlang des zweiten Heizelements dient, wobei die Heizaktivierung des zweiten Heizelements mindestens teilweise durch Eisbildungserkennung des zweiten Sensors bestimmt wird.
  2. Abtausystem nach Anspruch 1, wobei mindestens eine von der ersten Erfassungsvorrichtung (60) und der zweiten Erfassungsvorrichtung (70) ein Luftschalter zum Erkennen einer Druckdifferenz ist.
  3. Abtausystem nach Anspruch 1, wobei das erste Heizelement (80) und das zweite Heizelement (82) jeweils elektrische Heizelemente sind.
  4. Abtausystem nach Anspruch 1, wobei das erste Heizelement (80) während des Kühlsystembetriebs des Temperiergeräts (10) aktiviert werden kann.
  5. Abtausystem nach Anspruch 1, wobei das erste Heizelement (80) eines von einer Vielzahl von ersten Heizelementen ist und das zweite Heizelement (82) eines von einer Vielzahl von zweiten Heizelementen ist, wobei sich jedes der ersten Heizelemente näher am Kältemitteleinlass (54) befindet als sich jedes der mehreren zweiten Heizelemente am Kältemitteleinlass befindet.
  6. Abtausystem nach Anspruch 1, wobei das Temperiergerät (10) eine Transportkühleinheit ist.
  7. Abtausystem nach Anspruch 1, wobei die erste Erfassungsvorrichtung (60) und die zweite Erfassungsvorrichtung (70) jeweils Temperatursensoren zum Erfassen einer Temperaturdifferenz sind.
  8. Verfahren zum Abtauen eines Verdampferabschnitts (50) eines Temperiergeräts (10), einschließlich Mitteln zum gezielten Abtauen von Eis (72) an einem Kältemitteleinlass (54) des Verdampferabschnitts, wobei das Verfahren umfasst:
    Erkennen des Vorhandenseins von Eisansammlungen an einer ersten Stelle in der Nähe des Kältemitteleinlasses des Verdampferabschnitts mit einer ersten Erfassungsvorrichtung (60), die sich in der Nähe des Kältemitteleinlasses befindet;
    Erkennen des Vorhandenseins von Eisansammlungen an einer zweiten Stelle des Verdampferabschnitts mit einer zweiten Erfassungsvorrichtung (70), wobei die zweite Erfassungsvorrichtung weiter vom Kältemitteleinlass entfernt ist als der Abstand zwischen der ersten Erfassungsvorrichtung und dem Kältemitteleinlass;
    Aktivieren eines ersten Heizelements (80) bei Erkennung des Vorhandenseins von Eisbildung an der ersten Stelle, wobei das erste Heizelement für die Eisabtauung am Kältemitteleinlass bestimmt ist; und
    Aktivieren eines zweiten Heizelements (82), wenn festgestellt wird, dass an der zweiten Stelle Eisbildung vorliegt;
    wobei das erste Heizelement vertikal zu dem Verdampferabschnitt ausgerichtet ist, das zweite Heizelement entlang einer Längsrichtung des Verdampferabschnitts ausgerichtet ist.
  9. Verfahren nach Anspruch 8, das ferner separates Steuern des ersten Heizelements (80) und des zweiten Heizelements (82) umfasst.
  10. Verfahren nach Anspruch 8, das ferner Aktivieren des ersten Heizelements (80) ohne Aktivieren des zweiten Heizelements (82) umfasst.
  11. Verfahren nach Anspruch 10, das ferner Aktivieren des ersten Heizelements (80) während des Kühlsystembetriebs des Temperiergeräts (10) umfasst.
  12. Verfahren nach Anspruch 8, wobei Erkennen des Vorhandenseins von Eisansammlungen an der ersten Stelle und der zweiten Stelle Erkennen eines ersten Druckunterschieds an der ersten Stelle und das Erkennen eines ersten Druckunterschieds an der zweiten Stelle umfasst.
EP19749138.4A 2018-07-30 2019-07-22 Abtausystem und verfahren zum abtauen eines verdampferteils eines temperiergeräts Active EP3830503B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862711973P 2018-07-30 2018-07-30
PCT/US2019/042777 WO2020028078A1 (en) 2018-07-30 2019-07-22 Defrost system and method of defrosting an evaporator section of a temperature control unit

Publications (2)

Publication Number Publication Date
EP3830503A1 EP3830503A1 (de) 2021-06-09
EP3830503B1 true EP3830503B1 (de) 2023-11-01

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EP19749138.4A Active EP3830503B1 (de) 2018-07-30 2019-07-22 Abtausystem und verfahren zum abtauen eines verdampferteils eines temperiergeräts

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US (1) US20210254881A1 (de)
EP (1) EP3830503B1 (de)
WO (1) WO2020028078A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11970048B2 (en) * 2021-08-20 2024-04-30 Thermo King Llc Methods and systems for defrosting a transport climate control system evaporator

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665566A (en) * 1951-12-12 1954-01-12 Gen Electric Evaporator defrosting arrangement
US4152900A (en) * 1978-04-04 1979-05-08 Kramer Trenton Co. Refrigeration cooling unit with non-uniform heat input for defrost
ITPD20050160A1 (it) * 2005-05-27 2006-11-28 Giuseppe Floris Dispositivo antighiaccio per refrigeratori
US7836707B2 (en) * 2006-01-20 2010-11-23 Carrier Corporation Methods for detecting and responding to freezing coils in HVAC systems
KR20120072779A (ko) * 2010-12-24 2012-07-04 주식회사 대우일렉트로닉스 제상히터를 구비한 냉장고
KR101771722B1 (ko) * 2011-09-29 2017-09-05 엘지전자 주식회사 냉장고 및 상기 냉장고의 제상제어방법
JP5745381B2 (ja) * 2011-10-05 2015-07-08 三菱電機株式会社 冷却装置
KR20160027761A (ko) * 2014-09-02 2016-03-10 한국알프스 주식회사 냉장고 제상시기 검출을 위한 성에 감지 유닛과 이를 포함하는 냉장고 제상장치 및 방법
KR20170005651A (ko) * 2015-07-06 2017-01-16 김형진 저온 저장고용 실내기 및 그의 제상 제어방법
US20180195789A1 (en) * 2015-07-07 2018-07-12 Carrier Corporation Transport refrigeration unit
DK178990B1 (en) * 2015-12-29 2017-07-31 Maersk Line As Fremgangsmåde til bestemmelse af, hvornår en afrimningscyklus i en kølecontainer skal afsluttes

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US20210254881A1 (en) 2021-08-19
WO2020028078A1 (en) 2020-02-06
EP3830503A1 (de) 2021-06-09

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