WO2005088215A1 - A cooling device and its control method - Google Patents
A cooling device and its control method Download PDFInfo
- Publication number
- WO2005088215A1 WO2005088215A1 PCT/IB2005/050846 IB2005050846W WO2005088215A1 WO 2005088215 A1 WO2005088215 A1 WO 2005088215A1 IB 2005050846 W IB2005050846 W IB 2005050846W WO 2005088215 A1 WO2005088215 A1 WO 2005088215A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- defrost
- door
- freshfood compartment
- time
- compartment
- Prior art date
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
- 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
-
- 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
- F25D29/00—Arrangement or mounting of control or safety devices
-
- 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
- F25B2600/23—Time delays
-
- 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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
-
- 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
- F25D2700/02—Sensors detecting door opening
-
- 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
- F25D2700/12—Sensors measuring the inside temperature
Definitions
- This invention is related to a cooling device and control method wherein the yield is increased by avoiding unnecessary defrosts when the door is closed.
- evaporator in cooling systems has the coolest surface inside the compartment that it is located in, moist air in the environment causes frost on the surface of evaporator.
- Frost accumulated on the surface of evaporator needs to be melted periodically by the defrosting process.
- the period of defrosting process is determined by defrost control algorithms that are based on parameters such as the amount of frost on the evaporator, opening and closing frequency of the refrigerator's door or energy consumption; or defrosting takes place within predetermined constant time frames. Cooling efficiency is increased by avoiding frost with the defrosting process; however, since the operation requires high energy consumption, the increased energy consumption costs affect consumers. Therefore, the optimisation of the number of defrost processes and their timings provides decreased energy consumption.
- Amount of frost accumulated on the evaporator is directly proportional to moisture level in the air that is circulating inside the cooling system. When the moisture level is high, frost accumulated increases. If the refrigerator's door stays open for a long time, since no air goes inside the refrigerator from outside, moisture level circulating in the air constantly decreases. In this case, frost accumulation on the evaporator takes a longer period. In order to decrease the energy consumption when the door is kept close for long periods, various defrost methods are developed.
- the aim of this invention is to realize a cooling system and its control method where the defrost times are arranged so as to decrease the energy consumption cost of the user.
- Figure 1 is a schematic representation of a cooling device
- Figure 2 is a flow chart of a cooling device control method
- Figure 3 and 4 is a flow chart of alternative applications of a cooling device control method.
- Cooling device (1) preferably a no-frost refrigerator, comprises a freshfood compartment (2) in which food and beverages are stored, a freezing compartment (3) in which foods are stored by being frozen, one or more doors (4) that enable access to the compartments (2 and 3), a compressor (5) that aids the execution of the cooling cycle, an evaporator (6) that provides cooling of the inner volume of the cooling device (1) by absorbing thermal energy, a defrost unit (7) that provides cleaning of frost accumulated on the evaporator (6), a thermometer (8) that enables measurement of the temperature inside the freshfood compartment (6), one or more door switches (11) that become open when the door is open and that go off when the door is closed, a control card (9) that determines the operation periods of defrost unit (7) based on constant or variable defrost algorithms, and that delays the operation period of defrost unit (7) until the temperature of the freshfood compartment (2) exceeds a predetermined limit temperature value in a predetermined latency time, if the door
- Control card (9) tracks the status of the door (4) that covers any of the compartments (2 and 3) via the position of door switch (11) after any defrost process executed by the defrost unit (7). Succeeding defrost time that is determined by the defrost algorithm is stored in the memory (10). If the door (4) is opened before the succeeding defrost time, in other words when the door switch (11) is turned on, defrost process is executed at the predetermined time. If the door (4) is kept close, in other words door switch (11) always remains off, defrost process is delayed by the control card (9).
- thermometer (8) Information gathered from the thermometer (8) is controlled continuously; defrost process does not take place if the temperature of the freshfood compartment (2) does not exceed the limit temperature value. If the temperature of the freshfood compartment (2) exceeds the limit value and remains above this limit value for a certain period, control card (9) initiates the defrost unit (7) and defrost process is performed. The longer period of the temperature of the freshfood compartment (2) exceeding the limit temperature value is an indication of the increasing amount of frost on the evaporator (6) and reveals the need for defrost process.
- Limit temperature value (Ts) of the freshfood compartment (2), limit warming period (zs) of the freshfood compartment (2), defrost additional delay time (z2) and minimum time span (z3) between two defrost processes when the door (4) is closed are predetermined by the manufacturer and recorded on the memory (10).
- Defrost process of the cooling device (1) is controlled as follows: - Succeeding defrost time (zd) is computed following the completion of the defrost process (101), - It is controlled whether the door (4) is opened (102), - Waited until the succeeding defrost time (zd), if the door is opened (103), - Defrost process is performed by operating the defrost unit (7) (106), - Returned to the step where the succeeding defrost time is computed (101), - If the door (4) is not opened, temperature of the freshfood compartment (Tl) determined by the thermometer (8) is compared (104) with the limit temperature value (Ts) of the freshfood compartment (2) , - Returned to the step (102) where it is controlled whether the door is closed or not if the temperature of the freshfood compartment (Tl) is lower than the limit temperature value of the freshfood compartment (2) (Ts), - If the temperature of the freshfood compartment (Tl) is higher than the limit
- the minimum time span (z3) required to take place between successive defrost processes when the doors (4) are closed is determined.
- the switch (11) is pressed but still a slight opening exists or in case hot food is loaded in the cooling device (1) or cooling is insufficient due to a failure (gas leakage etc.), since the temperature of the freshfood compartment (Tl) would always remain above the limit temperature value (Ts) of the freshfood compartment (2), a continuous cycle of defrosting would be encountered.
- the following steps are performed: - If the time span (zl) in which the temperature of freshfood compartment (2) stays above the limit temperature value (Ts) of freshfood compartment (2) is higher than limit warming time (zs) of the freshfood compartment (2), it is checked whether the minimum time span (z3) between two successive defrost processes when the door (4) is closed, is passed or not (201), - Returned to the step (102) where it is controlled whether the door is closed or not if the minimum time span (z3) between two defrost processes when the door (4) is closed is not completed, , - If the minimum time span (z3) between two defrost process when the door (4) is closed is completed, defrost is performed by operating the defrost unit (7) (106) ( Figure
- Defrost is performed by operating the defrost unit (7) (106) ( Figure 4).
- the defrost unit (7) (106) ( Figure 4).
- the defrost process is performed by taking into consideration the temperature of the freshfood compartment (Tl), which leads to less defrost processes and a decrease in energy consumption cost of the user.
Landscapes
- 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)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05708972.4A EP1730457B1 (en) | 2004-03-08 | 2005-03-08 | A cooling device and its control method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR200400456 | 2004-03-08 | ||
TR2004/00456 | 2004-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005088215A1 true WO2005088215A1 (en) | 2005-09-22 |
Family
ID=34961550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2005/050846 WO2005088215A1 (en) | 2004-03-08 | 2005-03-08 | A cooling device and its control method |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1730457B1 (en) |
KR (1) | KR100780101B1 (en) |
CN (1) | CN100460788C (en) |
RU (1) | RU2337283C2 (en) |
TR (1) | TR200604831T1 (en) |
WO (1) | WO2005088215A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20111240A1 (en) * | 2011-12-30 | 2013-07-01 | Indesit Co Spa | METHOD AND DEVICE FOR CONTROL OF THE DEFROSTING PHASE OF A REFRIGERANT APPLIANCE AND A REFRIGERANT APPLIANCE THAT IMPLEMENTS THIS METHOD |
EP2375198A3 (en) * | 2010-04-12 | 2013-08-28 | Vestel Beyaz Esya Sanayi Ve Ticaret A.S. | A method for defrosting process |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020135979A1 (en) | 2018-12-25 | 2020-07-02 | Arcelik Anonim Sirketi | A cooling device with reduced energy consumption |
CN110873447B (en) * | 2019-11-29 | 2021-11-12 | 深圳麦克维尔空调有限公司 | Defrosting control method, device and equipment of refrigeration air conditioner |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4297852A (en) * | 1980-07-17 | 1981-11-03 | General Electric Company | Refrigerator defrost control with control of time interval between defrost cycles |
US5483804A (en) * | 1994-03-28 | 1996-01-16 | Sanyo Electric Co., Ltd. | Defrost control apparatus for refrigerator |
US20010054292A1 (en) | 2000-01-07 | 2001-12-27 | Ronald Davis | Control system and related methods for refrigeration and freezer units |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1028798C (en) * | 1987-05-18 | 1995-06-07 | 罗斯蒙德公司 | Modular pressure instrument |
CN1034987C (en) * | 1994-11-04 | 1997-05-28 | 广西大学 | Iron cage dam (or dyke) technology for purification of waste water |
AU1262700A (en) * | 1998-10-05 | 2000-04-26 | Powerpulse Holding Ag | Light element having a translucent surface |
-
2005
- 2005-03-08 CN CNB2005800074216A patent/CN100460788C/en not_active Expired - Fee Related
- 2005-03-08 TR TR2006/04831T patent/TR200604831T1/en unknown
- 2005-03-08 EP EP05708972.4A patent/EP1730457B1/en active Active
- 2005-03-08 RU RU2006135377/12A patent/RU2337283C2/en not_active IP Right Cessation
- 2005-03-08 KR KR1020067018293A patent/KR100780101B1/en not_active IP Right Cessation
- 2005-03-08 WO PCT/IB2005/050846 patent/WO2005088215A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4297852A (en) * | 1980-07-17 | 1981-11-03 | General Electric Company | Refrigerator defrost control with control of time interval between defrost cycles |
US5483804A (en) * | 1994-03-28 | 1996-01-16 | Sanyo Electric Co., Ltd. | Defrost control apparatus for refrigerator |
US20010054292A1 (en) | 2000-01-07 | 2001-12-27 | Ronald Davis | Control system and related methods for refrigeration and freezer units |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2375198A3 (en) * | 2010-04-12 | 2013-08-28 | Vestel Beyaz Esya Sanayi Ve Ticaret A.S. | A method for defrosting process |
ITTO20111240A1 (en) * | 2011-12-30 | 2013-07-01 | Indesit Co Spa | METHOD AND DEVICE FOR CONTROL OF THE DEFROSTING PHASE OF A REFRIGERANT APPLIANCE AND A REFRIGERANT APPLIANCE THAT IMPLEMENTS THIS METHOD |
Also Published As
Publication number | Publication date |
---|---|
EP1730457A1 (en) | 2006-12-13 |
TR200604831T1 (en) | 2007-01-22 |
CN1934401A (en) | 2007-03-21 |
EP1730457B1 (en) | 2017-06-28 |
RU2337283C2 (en) | 2008-10-27 |
KR20060126808A (en) | 2006-12-08 |
RU2006135377A (en) | 2008-04-20 |
KR100780101B1 (en) | 2007-11-30 |
CN100460788C (en) | 2009-02-11 |
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