EP1888983A1 - A cooling device and the control method - Google Patents
A cooling device and the control methodInfo
- Publication number
- EP1888983A1 EP1888983A1 EP06745031A EP06745031A EP1888983A1 EP 1888983 A1 EP1888983 A1 EP 1888983A1 EP 06745031 A EP06745031 A EP 06745031A EP 06745031 A EP06745031 A EP 06745031A EP 1888983 A1 EP1888983 A1 EP 1888983A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- current
- thermostat
- thermal protector
- cut
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—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
- 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
- F25B49/025—Motor control arrangements
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/26—Problems to be solved characterised by the startup 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
-
- 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
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2104—Temperatures of an indoor room or compartment
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21153—Temperatures of a compressor or the drive means therefor of electronic components
Definitions
- the present invention relates to a cooling device comprising a compressor that function efficiently under heavy operational load.
- the choice of the compressor in the cooling system takes into consideration the limit operational conditions according to the climatic zones, consequently the capacity of the compressor can be larger than is necessary since probable maximum operational loads are taken into account.
- the capacity of the compressor being larger than is necessary can result in increased number of stops-start ups and increased cyclic losses.
- the compressor choice is made according to real working conditions that spans the larger portion of the life expectancy of a compressor, and the compressor velocity i.e. the rotational speed (rpm) of the compressor motor is changed in cases when the cooling device should work in limit conditions.
- rpm rotational speed
- the compressor velocity is accelerated with the help of an electronic card when the cooling device operates under heavy operational conditions such as high ambient temperatures or frequent opening closing of its door.
- the compressor is fed through the electronic card instead of the network power supply.
- the cut-out conditions are repeated in succession due to the algorithm requirement and the frequent cut-outs of the compressor lead to a reduction in efficiency.
- a gas turbine engine includes means for sensing a compressor stall, evaluating signals received from sensors and comparing the sensed signals to a predetermined threshold indicative of a healthy compressor, and for providing a processed signal indicative of an impending stall condition.
- the starting device acts to maintain energisation of the auxiliary winding after starting of the motor to overcome the extreme starting torque of the compressor for a long time to ensure that the running torque of the compressor will have fallen to a value lower than the normal stalling torque of the motor.
- the aim of the present invention is the realization of a cooling device and a control method where the unexpected successive stalls of the compressor is prevented.
- the motor electronic card enables the compressor motor to operate under high loads and velocities in start up and stop periods with the instructions of the thermostat.
- the compressor continues operating in successive stop and start up periods, it is fed through the network for a period of time at every start up and the compressor motor functions at constant velocity.
- the electronic circuit controlling the motor speed is provided protection against the high current drawn at the start up.
- the thermal protector that detects the motor temperature can cut off the feed current to stop the compressor due to overheating before the thermostat gives the stop instruction.
- the compressor When the compressor starts operating after waiting for a certain time period, it is fed through the network power supply resulting in an operational time period at constant velocity that is longer than the time period when it starts operating with the signal of the thermostat.
- Figure 1 - is the schematic view of a cooling device.
- Figure 2 - is the flow chart of a control method.
- Figure 3 - are the velocity - time and temperature - time graphs of a cooling device compressor operation.
- the cooling device (1) comprises a variable speed compressor (2) providing to perform the refrigerant cycle, a thermal protector (3) that detects the temperature of the compressor (2), opening at values higher than the preset temperatures and switching off the current (J) to stop the operation of the compressor (2) and closing at values lower than the preset temperatures to provide the restart of the compressor (2), a thermostat (4) that gives cut-in and cut-out instructions to the compressor (2) and an electronic card (5) which provides the implementation of an algorithm that controls the operational speed and the start up - stop durations of the compressor (2).
- the thermal protector (3) As the compressor (2) operates, the current (I) passes through the thermal protector (3) reaching the compressor (2) motor.
- the thermal protector (3) is positioned in the electrical connection box on the compressor (2) shell, and opens or closes depending on the changes in the ambient temperature.
- the thermal protector (3) opens at temperatures higher than the preset value, switching off the current (I) from the network power supply to the compressor (2) motor, and closes allowing the current (I) from the network power supply to reach the compressor (2) motor when the temperature falls below the preset value.
- the thermal protector (3) switches off the current (I) providing to stop the compressor (2) and pro tecting the electronic card (5).
- the compressor (2) After the start, the compressor (2) operates at constant velocity (Vo) for a time period (T3) longer than the time period (Tl) it operates at constant velocity (Vo), being fed by the current (I) from the network power supply that is applied for each first start up, later on, the current (I) is supplied through the electronic card (5) and it operates at a velocity of (Vl). If a cut-out instruction is received from the thermostat (4) while the compressor (2) operates at velocities of Vo or Vl, this instruction is obeyed, starting the T-off period.
- the cooling device (1) control method that prevents the repeated unexpected stalls of the compressor (2) is composed of the following steps :
- the compressor (2) is operated at constant velocity (Vo) at start up and during the time period (Tl) (101)
- the compressor (2) is operated at a constant velocity (Vo) for a time period (T3) longer than the time period (Tl) with current (I) supplied by the network power supply (105)
- the thermostat (4) is controlled for whether or not it has given the cut-out instruction (106)
- the cooling device (1) comprises a thermal protector heat sensor (6) which detects the temperature of the thermal protector (3).
- the thermal protector heat sensor (6) detects the temperature of the thermal protector (3) reaching below the preset value at which the thermal protector (3) closes and hence the thermal protector (3) allows the current (I) to flow.
- the thermal protector (3) stops the compressor (2) by switching off the current (I)
- the thermal protector (3) closes, allowing the current (I) to flow and the electronic card (5) operates the compressor (2) at the moment or a little while after the thermal protector (3) closes with the data received from the thermal protector heat sensor (6).
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Sampling And Sample Adjustment (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Temperature (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200630589T SI1888983T1 (en) | 2005-05-30 | 2006-05-26 | A cooling device and the control method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR200502024 | 2005-05-30 | ||
PCT/IB2006/051683 WO2006129255A1 (en) | 2005-05-30 | 2006-05-26 | A cooling device and the control method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1888983A1 true EP1888983A1 (en) | 2008-02-20 |
EP1888983B1 EP1888983B1 (en) | 2010-01-20 |
Family
ID=36802004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06745031A Not-in-force EP1888983B1 (en) | 2005-05-30 | 2006-05-26 | A cooling device and the control method |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1888983B1 (en) |
KR (1) | KR100946799B1 (en) |
CN (1) | CN100538220C (en) |
AT (1) | ATE456010T1 (en) |
BR (1) | BRPI0611215A2 (en) |
DE (1) | DE602006011887D1 (en) |
ES (1) | ES2339049T3 (en) |
SI (1) | SI1888983T1 (en) |
WO (1) | WO2006129255A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3611448A4 (en) * | 2017-04-12 | 2020-04-15 | Panasonic Intellectual Property Management Co., Ltd. | Refrigerated showcase |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2011378695B2 (en) * | 2011-10-03 | 2017-07-27 | Electrolux Home Products Corporation N.V. | Refrigerator and method of operating refrigeration system |
EP2904336A2 (en) * | 2012-08-06 | 2015-08-12 | Kriwan Industrie-Elektronik GmbH | Method for controlling a compressor of a refrigeration system, and refrigeration system |
US9528727B2 (en) * | 2013-03-15 | 2016-12-27 | Whirlpool Corporation | Robust fixed-sequence control method and appliance for exceptional temperature stability |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1301875B1 (en) * | 1998-07-29 | 2000-07-07 | Whirlpool Co | SELF-ADAPTIVE CONTROL FOR THE REGULATION OF REFRIGERATORS AND FREEZERS |
TR200300994T1 (en) * | 2001-02-26 | 2004-01-21 | Arçeli̇k A.Ş. | Cooling efficiency increase method. |
US6532433B2 (en) * | 2001-04-17 | 2003-03-11 | General Electric Company | Method and apparatus for continuous prediction, monitoring and control of compressor health via detection of precursors to rotating stall and surge |
JP4155084B2 (en) * | 2002-06-12 | 2008-09-24 | 株式会社デンソー | Electric compressor |
AU2003265215A1 (en) * | 2002-09-02 | 2004-03-19 | Arcelik, A.S | Refrigerator control method |
-
2006
- 2006-05-26 AT AT06745031T patent/ATE456010T1/en not_active IP Right Cessation
- 2006-05-26 SI SI200630589T patent/SI1888983T1/en unknown
- 2006-05-26 KR KR1020077028863A patent/KR100946799B1/en not_active IP Right Cessation
- 2006-05-26 DE DE602006011887T patent/DE602006011887D1/en active Active
- 2006-05-26 BR BRPI0611215-3A patent/BRPI0611215A2/en active Search and Examination
- 2006-05-26 EP EP06745031A patent/EP1888983B1/en not_active Not-in-force
- 2006-05-26 ES ES06745031T patent/ES2339049T3/en active Active
- 2006-05-26 WO PCT/IB2006/051683 patent/WO2006129255A1/en not_active Application Discontinuation
- 2006-05-26 CN CNB2006800188033A patent/CN100538220C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006129255A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3611448A4 (en) * | 2017-04-12 | 2020-04-15 | Panasonic Intellectual Property Management Co., Ltd. | Refrigerated showcase |
Also Published As
Publication number | Publication date |
---|---|
DE602006011887D1 (en) | 2010-03-11 |
ES2339049T3 (en) | 2010-05-14 |
CN100538220C (en) | 2009-09-09 |
EP1888983B1 (en) | 2010-01-20 |
WO2006129255A1 (en) | 2006-12-07 |
SI1888983T1 (en) | 2010-04-30 |
KR20080022547A (en) | 2008-03-11 |
CN101184965A (en) | 2008-05-21 |
ATE456010T1 (en) | 2010-02-15 |
BRPI0611215A2 (en) | 2010-08-24 |
KR100946799B1 (en) | 2010-03-11 |
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