EP1367346A2 - Verfahren zum Steuern des Abtauprozesses eines Verdampfers - Google Patents
Verfahren zum Steuern des Abtauprozesses eines Verdampfers Download PDFInfo
- Publication number
- EP1367346A2 EP1367346A2 EP03010509A EP03010509A EP1367346A2 EP 1367346 A2 EP1367346 A2 EP 1367346A2 EP 03010509 A EP03010509 A EP 03010509A EP 03010509 A EP03010509 A EP 03010509A EP 1367346 A2 EP1367346 A2 EP 1367346A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- water mass
- air
- determined
- water
- 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
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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
-
- 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
- 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
Definitions
- the invention relates to a method for controlling the defrosting process of a frosted and / or iced evaporator, in particular a refrigerator evaporator, in which the temperatures of the evaporator return air (T RL ) and the evaporator supply air (T ZL ) and the evaporation temperature are detected.
- a defrosting process in evaporators of refrigeration furniture usually in fixed predetermined intervals - for example, twice a day - carried out.
- To Be by means of a defrost timer fixed defrost - z. For example, 6:00 am and 6:00 pm. At these times, a defrosting process is initiated, which only then is terminated when arranged on the evaporator to be defrosted Temperature sensor has reached a predetermined setpoint.
- the defrosting process actually becomes required defrost duration - ie the time interval between defrost start and end - of the defrost control is determined and saved. Based on this stored Defrost duration is then determined, whether due to a small frost buildup on Evaporator the next or the next regular, fixed Defrost processes can be skipped.
- Object of the present invention is to provide a generic method for Controlling the defrosting process of a frosted and / or iced evaporator specify that avoids the disadvantage described above.
- evaporator return air and “Evaporator supply air” respectively designate the air flow entering the evaporator or exits the evaporator.
- the air thus enters the evaporator at a temperature T RL and the relative humidity ⁇ RL and leaves it at the temperature T ZL in the saturated state.
- the relative humidity ⁇ ZL of the evaporator supply air is therefore assumed to be 1.
- feature f) are determined between two defrosting processes Water mass values added up and with an adjustable water mass setpoint compared.
- the term "between two defrosting processes” is also the Period between (re) commissioning of the evaporator or the Cooling furniture and the first subsequent defrosting process to understand.
- the aforementioned parameters relative humidity ( ⁇ RL ) of the evaporator return air, water loading at the evaporator inlet (x RL ) and water loading at the evaporator outlet (x ZL ) are detected substantially continuously.
- the inventive method for controlling the defrosting process of a frosted and / or iced evaporator now allows continuous detection the real water load on the evaporator, which has the consequence that each optimal time for a defrosting process actually required to be determined can. This results in an optimization of the energy consumption of the or Evaporator having refrigerated cabinet and an increase in reliability, in particular an increase in the temperature safety for in the refrigerator stored goods.
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)
- Defrosting Systems (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
Claims (5)
- Verfahren zum Steuern des Abtauprozesses eines bereiften und/oder vereisten Verdampfers, insbesondere eines Kühlmöbel-Verdampfers, bei dem die Temperaturen der Verdampfer-Rückluft (TRL) und der Verdampfer-Zuluft (TZL) sowie die Verdampfungstemperatur erfasst werden, dadurch gekennzeichnet, dassa) die relative Feuchte (ϕRL) der Verdampfer-Rückluft erfasst wird,b) die relative Feuchte (ϕZL) der Verdampfer-Zuluft mit 1 angenommen wird, da diese nach dem Durchgang durch den Verdampfer im gesättigten Zustand vorliegt,c) der Umluftvolumenstrom (VL) des Verdampfers ermittelt wird,d) mittels der Zustandsgleichung für feuchte Luft die Wasserbeladung am Verdampferein- (XRL) und -austritt (XZL) bestimmt und die am Verdampfer angelagerte Wassermenge (ΔX = XRL - XZL) ermittelt wird,e) mittels der Gleichung mw = ρL * VL * Δx * Δt für ein Zeitintervall (Δt) die am Verdampfer angelagerte Wassermasse ermittelt wird, wobei der Parameter ρL für die Dichte der Luft steht,f) zwischen zwei Abtauprozessen die derart ermittelten Wassermassenwerte (mw) aufsummiert und mit einem einstellbaren Wassermassen-Sollwert verglichen werden, undg) bei Erreichen des Wassermassen-Sollwertes ein Abtauprozess eingeleitet wird.
- Verfahren zum Steuern des Abtauprozesses eines bereiften und/oder vereisten Verdampfers, insbesondere eines Kühlmöbel-Verdampfers, bei dem die Temperaturen der Verdampfer-Rückluft (TRL) und der Verdampfer-Zuluft (TZL) sowie die Verdampfungstemperatur erfasst werden, dadurch gekennzeichnet, dassa) die relative Feuchte (ϕRL) der Verdampfer-Rückluft erfasst wird,b) die relative Feuchte (ϕZL) der Verdampfer-Zuluft mit 1 angenommen wird, da diese nach dem Durchgang durch den Verdampfer im gesättigten Zustand vorliegt,c) der Umluftvolumenstrom (VL) des Verdampfers ermittelt wird,d) mittels der Zustandsgleichung für feuchte Luft die Wasserbeladung am Verdampferein- (xRL) und -austritt (xZL) bestimmt und die am Verdampfer angelagerte Wassermenge (Δx = xRL - xZL) ermittelt wird,e) mittels der Gleichung mw = ρL * VL * Δx * Δt für ein Zeitintervall (Δt) die am Verdampfer angelagerte Wassermasse ermittelt wird, wobei der Parameter ρL für die Dichte der Luft steht,f) zwischen zwei Abtauprozessen die derart ermittelten Wassermassenwerte (mw) aufsummiert und mit einem einstellbaren Wassermassen-Sollwert verglichen werden,g) bei Erreichen oder unmittelbar vor dem Erreichen eines einstellbaren Abtauprozess-Zeitpunktes ein Vergleich zwischen dem Wassermassen-Sollwert und dem aktuellen Wassermassenwert erfolgt,h) mittels des aktuellen Wassermassenwertes und der durchschnittlichen Entfeuchtungsrate seit dem letzten Abtauprozess der voraussichtliche Zeitpunkt des Erreichens des Wassermassen-Sollwertes ermittelt wird undi) sofern der Zeitpunkt des Erreichens des Wassermassen-Sollwertes nach dem eingestellten Abtauprozess-Zeitpunkt eintritt, der nächstfolgende Abtauprozess übersprungen oder verzögert wird, währendj) sofern der Zeitpunkt des Erreichens des Wassermassen-Sollwertes vor dem eingestellten Abtauprozess-Zeitpunkt eintritt, der nächstfolgende Abtauprozess eingeleitet wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zumindest die Parameter relative Feuchte (ϕRL) der Verdampfer-Rückluft, Wasserbeladung am Verdampfereintrit (xRL) und Wasserbeladung am Verdampferaustritt (xZL) im Wesentlichen kontinuierlich erfasst werden.
- Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Parameter Umluftvolumenstrom (VL) des Verdampfers lediglich einmal ermittelt wird.
- Verfahren nach einem der vorhergehenden Ansprüche 2 bis 4, dadurch gekennzeichnet, dass spätestens bei Erreichen des Wassermassen-Sollwertes ein Abtauprozess eingeleitet wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10223716 | 2002-05-28 | ||
| DE10223716A DE10223716A1 (de) | 2002-05-28 | 2002-05-28 | Verfahren zum Steuern des Abtauprozesses eines Verdampfers |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1367346A2 true EP1367346A2 (de) | 2003-12-03 |
| EP1367346A3 EP1367346A3 (de) | 2005-08-03 |
| EP1367346B1 EP1367346B1 (de) | 2007-03-28 |
Family
ID=29414232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03010509A Expired - Lifetime EP1367346B1 (de) | 2002-05-28 | 2003-05-09 | Verfahren zum Steuern des Abtauprozesses eines Verdampfers |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1367346B1 (de) |
| AT (1) | ATE358264T1 (de) |
| DE (2) | DE10223716A1 (de) |
| ES (1) | ES2283677T3 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005083337A1 (en) | 2004-02-24 | 2005-09-09 | Carrier Corporation | Adaptive defrost method |
| EP1916490A1 (de) | 2006-10-16 | 2008-04-30 | Wurm GmbH & Co. KG Elektronische Systeme | Abtausteuerverfahren |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7802441B2 (en) | 2004-05-12 | 2010-09-28 | Electro Industries, Inc. | Heat pump with accumulator at boost compressor output |
| US7849700B2 (en) | 2004-05-12 | 2010-12-14 | Electro Industries, Inc. | Heat pump with forced air heating regulated by withdrawal of heat to a radiant heating system |
| CN108646695B (zh) * | 2018-07-12 | 2020-05-22 | 杭州数亦有道科技有限公司 | 一种用于蒸发工序的智能控制方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3759049A (en) * | 1972-02-25 | 1973-09-18 | Whirlpool Co | Defrost control |
| DE3110042A1 (de) * | 1981-03-16 | 1982-09-30 | Gesellschaft für Wärmepumpen und Energierückgewinnungsanlagen mbH, 7311 Holzmaden | Verfahren und anordnung zum abtauen von eis an einem luftkuehler einer waermepumpe oder kaeltemaschine |
| US4561263A (en) * | 1983-03-28 | 1985-12-31 | Honeywell Inc. | Refrigeration or heat pump system defrost |
| DE3333907A1 (de) * | 1983-09-20 | 1985-04-04 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | Verfahren und vorrichtung zur abtauregelung von waermepumpen |
| DE4318842A1 (de) * | 1993-06-07 | 1994-12-08 | York Int Gmbh | Verfahren zum Abtauen einer Kälteanlage |
| DE4318843A1 (de) * | 1993-06-07 | 1994-12-08 | York Int Gmbh | Verfahren zum Betätigen von Rahmenheizungen in Kühlmöbeln |
| DE19844854A1 (de) * | 1998-09-30 | 2000-04-06 | Winfried H Eming | Verfahren zur zeitunabhängigen Abtauung von Kälteverdampfern in Kühlmöbeln und Kühlmöbel zur Durchführung des Verfahrens |
-
2002
- 2002-05-28 DE DE10223716A patent/DE10223716A1/de not_active Withdrawn
-
2003
- 2003-05-09 AT AT03010509T patent/ATE358264T1/de active
- 2003-05-09 ES ES03010509T patent/ES2283677T3/es not_active Expired - Lifetime
- 2003-05-09 DE DE50306888T patent/DE50306888D1/de not_active Expired - Lifetime
- 2003-05-09 EP EP03010509A patent/EP1367346B1/de not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005083337A1 (en) | 2004-02-24 | 2005-09-09 | Carrier Corporation | Adaptive defrost method |
| EP1725819A4 (de) * | 2004-02-24 | 2010-12-22 | Carrier Corp | Adaptives enteisungsverfahren |
| EP1916490A1 (de) | 2006-10-16 | 2008-04-30 | Wurm GmbH & Co. KG Elektronische Systeme | Abtausteuerverfahren |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE358264T1 (de) | 2007-04-15 |
| DE10223716A1 (de) | 2003-12-11 |
| DE50306888D1 (de) | 2007-05-10 |
| EP1367346A3 (de) | 2005-08-03 |
| ES2283677T3 (es) | 2007-11-01 |
| EP1367346B1 (de) | 2007-03-28 |
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