WO2005077689A1 - 空調装置 - Google Patents
空調装置 Download PDFInfo
- Publication number
- WO2005077689A1 WO2005077689A1 PCT/JP2005/001663 JP2005001663W WO2005077689A1 WO 2005077689 A1 WO2005077689 A1 WO 2005077689A1 JP 2005001663 W JP2005001663 W JP 2005001663W WO 2005077689 A1 WO2005077689 A1 WO 2005077689A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compression
- compression mechanism
- capacity
- evaporator
- air
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/3211—Control means therefor for increasing the efficiency of a vehicle refrigeration cycle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/3208—Vehicle drive related control of the compressor drive means, e.g. for fuel saving purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3269—Cooling devices output of a control signal
- B60H2001/327—Cooling devices output of a control signal related to a compressing unit
-
- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
- F25B2400/0751—Details of compressors or related parts with parallel compressors the compressors having different capacities
-
- 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
- F25B2600/0253—Compressor control by controlling speed with variable speed
-
- 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
- F25B2700/2106—Temperatures of fresh outdoor air
-
- 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
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator
- F25B2700/21172—Temperatures of an evaporator of the fluid cooled by the evaporator at the inlet
Definitions
- the present invention relates to an air conditioner provided with a refrigeration cycle having a compressor for a refrigerant, and more particularly to an air conditioner capable of suitably controlling a refrigeration cycle having a fixed capacity compression mechanism and a variable capacity compression mechanism independent of each other.
- a refrigeration cycle having a compressor for a refrigerant
- an air conditioner capable of suitably controlling a refrigeration cycle having a fixed capacity compression mechanism and a variable capacity compression mechanism independent of each other.
- a conventional air conditioner for example, an air conditioner for a construction machine
- a compressor of a refrigeration cycle is driven by a prime mover and configured as an air conditioner.
- a single refrigeration cycle uses multiple compressors, and the drive power is transmitted to each of them.
- a system may be provided.
- an air conditioner in which one is a fixed capacity type compressor and the other is a variable capacity type compressor (for example, Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003—19908
- an object of the present invention is to provide a refrigeration system including two compression mechanisms, one being a fixed capacity compression mechanism and the other being a variable capacity compression mechanism capable of changing the capacity. By performing the optimal feed-forward or Z and feedback control even in different operating conditions for the air conditioner, the required cooling performance can be reduced.
- An object of the present invention is to provide an air conditioner suitable for use in, for example, a cabin of a construction machine.
- an air conditioner comprises a fixed-capacity first compression mechanism and a variable-capacity second compression mechanism that are independent of each other during a refrigeration cycle.
- a second compression mechanism capacity control unit that has two compression mechanisms and controls the capacity of the second compression mechanism; and a compression mechanism that switches between operation using the two compression mechanisms or operation using one of the compression mechanisms.
- Operation switching control means refrigerant evaporator for cooling air-conditioning air, refrigerant condenser, blower for blowing air to the evaporator, second compression mechanism for calculating compression capacity for feedforward control in second compression mechanism
- the second compression mechanism feedforward compression capacity calculation means is capable of operating independently of the second compression mechanism, the first compression mechanism and the second compression mechanism. For the time of simultaneous operation, consisting of those and calculates the compression capacity by different second compression mechanism feedforward compression volume arithmetic expression (first embodiment).
- the air conditioner according to the present invention has two compression mechanisms, a fixed capacity type first compression mechanism and a variable capacity type second compression mechanism, independent of each other during a refrigeration cycle.
- Second compression mechanism capacity control means for controlling the capacity of the second compression mechanism, compression mechanism operation switching control means for switching to operation by the two compression mechanisms or operation by one of the compression mechanisms, cooling air conditioning air Refrigerant evaporator, refrigerant condenser, blower that blows air to the evaporator, evaporator or evaporator temperature detection means to detect evaporator outlet air temperature, and target temperature of evaporator or evaporator outlet air temperature.
- the evaporator target temperature calculation means to be calculated the feedback compression capacity in the second compression mechanism is determined by referring to the deviation between the evaporator or evaporator outlet air temperature and the target temperature of the evaporator or evaporator outlet air temperature.
- An air conditioner provided with a second compression mechanism feedback compression capacity calculation means for calculating the second compression mechanism feedback compression capacity calculation means, when the second compression mechanism operates alone, and when the first compression mechanism and the second compression mechanism
- the second embodiment is characterized in that the feedback compression capacity is calculated by a second compression mechanism feedback compression capacity calculation equation having different coefficients for the simultaneous operation of the compression mechanisms (second embodiment).
- the air conditioner according to the present invention has two compression mechanisms of a fixed capacity type first compression mechanism and a variable capacity type second compression mechanism that are independent of each other during the refrigeration cycle.
- Second compression mechanism capacity control means for controlling the capacity of the mechanism, compression mechanism operation switching control means for switching between operation by the two compression mechanisms, or operation by one of the compression mechanisms, a refrigerant evaporator for cooling air conditioning air , A condenser for the refrigerant, a blower that blows air to the evaporator, a feed-forward compression capacity calculation means for the second compression mechanism that calculates the compression capacity for feedforward control in the second compression mechanism, an evaporator or evaporator outlet Evaporator temperature detecting means for detecting air temperature, evaporator target temperature calculating means for calculating the target temperature of evaporator or evaporator outlet air temperature, evaporator or evaporator outlet air temperature An air conditioner provided with a second compression mechanism feedback compression capacity calculating means for calculating a feedback compression capacity in the second compression mechanism by referring to
- the second compression mechanism feed-forward compression capacity calculation means is different in the second compression mechanism feed-forward compression between the independent operation by the second compression mechanism and the simultaneous operation of the first compression mechanism and the second compression mechanism.
- the compression capacity is calculated by a capacity calculation formula, and the second compressor structure feedback compression capacity calculation means performs the single operation by the second compression mechanism and the simultaneous operation of the first compression mechanism and the second compression mechanism. Calculate the feedback compression capacity by the second compression mechanism feedback compression capacity calculation formula with different coefficients for Consisting of those wherein (third embodiment).
- the compression mechanism operation switching control means switches the single operation by the first compression mechanism to the simultaneous operation by the first and second compression mechanisms.
- the second compression mechanism refers only to the feedforward compression capacity of the second compression mechanism without referring to the feedback compression capacity calculated by the feedback compression capacity calculation means, and It is preferable that the capacity of the second compression mechanism is controlled by the two-compression-mechanism capacity control means so that the operation is switched to the simultaneous operation.
- the second compression mechanism feed-forward compression is used.
- the capacity calculating means refers to the refrigeration cycle heat load during the second compression mechanism alone operation, and thereby simultaneously operates the refrigeration cycle heat load and the prime mover that is the driving source of the first compressor mechanism during the first and second compression mechanism simultaneous operations. It is preferable to calculate the feedforward compression capacity of the second compression mechanism by referring to the rotation speed or Z and the speed of the vehicle running by the prime mover.
- the above-mentioned predetermined time is calculated, for example, by referring to the heat load of the refrigeration cycle, the rotation speed or Z of the prime mover which is the drive source of the first compression mechanism, and the speed of the vehicle driven by the prime mover. be able to.
- the above-mentioned refrigeration cycle heat load can be obtained by detecting the outside air temperature, the indoor temperature, the amount of air blown or a physical quantity correlated with the amount of air blown, and the amount of solar radiation, or It can be calculated by detecting at least one of the above.
- the second compression mechanism may be configured as a variable displacement compression mechanism based on a displacement control signal or a variable displacement compression mechanism based on rotation speed control.
- the air conditioner according to the present invention which performs such feedforward or Z and feedback control, is suitable as a vehicle air conditioner, particularly as a construction machine air conditioner.
- the optimum feed-forward is different from the capacity control method of the second compression mechanism even in different operation states such as simultaneous operation or independent operation of the second compression mechanism.
- Z and feedback control can be performed, whereby stable and appropriate air conditioning control can be performed for required cooling performance.
- FIG. 1 is a schematic system diagram of an air conditioner according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing an example of control of the air conditioner of FIG. 1.
- FIG. 3 is a flowchart showing an example of control of the air conditioner of FIG. 1.
- FIG. 1 is a schematic system diagram of an air conditioner according to an embodiment of the present invention, for example, an air conditioner for construction equipment.
- a blower 4 for pressure-feeding the outside air or the Z and inside air inlet 3 is provided upstream of a ventilation duct 2 that opens into a room (for example, in a cabin).
- a ventilation duct 2 that opens into a room (for example, in a cabin).
- an evaporator 5 is provided as a cooler for cooling the air to be blown.
- a heater core as a heater may be provided downstream of the evaporator 5 as necessary. After passing through the evaporator 5, the cooled air is blown into the room.
- the air conditioning apparatus 1 as described above is provided with a refrigeration cycle 6 including the evaporator 5.
- the refrigeration cycle 6 is configured as a refrigerant circuit in which each device is connected via a refrigerant pipe.
- a fixed displacement type first compression mechanism 9 whose drive is controlled by a control signal 8, and a displacement displacement signal 10 which is sent to the main controller 7 and whose displacement is controlled by a displacement control signal 11 from the main controller 7.
- a second compression mechanism 12 of the type is provided. In the present embodiment, the second compression mechanism 12 is driven by an electric motor.
- the refrigeration cycle 6 includes a condenser 13 for condensing the high-temperature and high-pressure refrigerant compressed by the first compression mechanism 9 and / or the second compression mechanism 12, a receiver 14 for separating gas-liquid of the condensed refrigerant 14, An expansion valve 15 that decompresses and expands the refrigerant from the liquid receiver 14 and an evaporator 5 that evaporates the refrigerant from the expansion valve 15 and cools the air by heat exchange with air sent through the ventilation duct 2. Arranged in this order, the refrigerant from the evaporator 5 is sucked into the compression mechanism and compressed again.
- the temperature control of the evaporator 5 is performed, for example, by control of a clutch provided in a driving force transmission circuit from the prime mover to the first compression mechanism 9 and control signals of an electric motor for driving the second compression mechanism 12. T! /
- the main controller 7 includes the evaporator or the evaporator outlet air temperature (
- a signal of the evaporator outlet air temperature (Teva) detected by the evaporator outlet air temperature sensor 16 as evaporator temperature detecting means for detecting Teva) is sent.
- the main controller 7 receives a signal of the vehicle interior temperature (Tin) detected by the vehicle interior temperature sensor 17, a signal of the outdoor air temperature (Tamb) detected by the outdoor air temperature sensor 18, and a signal detected by the solar radiation sensor 19.
- the solar radiation (Rsun) signal is also sent.
- control as shown in FIGS. 2 and 3 is performed by the main controller 7.
- the first compression mechanism 9 is of a fixed displacement type and is controlled by a clutch signal.
- the clutch signal includes a target evaporator temperature value (Toff) and an evaporator outlet air temperature detected by the evaporator outlet air temperature sensor 16 (Toff).
- Teva is calculated by the following equation.
- the evaporator temperature control is performed by the capacity control means, and a force for controlling the capacity variable mechanism by the capacity control signal 11, or
- the second compression mechanism 12 is controlled by controlling the number of revolutions of an electric motor for driving the second compression mechanism 12.
- the compression capacity of the second compression mechanism 12 is controlled by a feedforward (FF) operation term and a feedback (FB) operation term. It is.
- the FF and FB calculation terms have a control method suitable for the operation state.
- a difference is provided between simultaneous operation by the first and second compression mechanisms as compared with the single operation of the second compression mechanism.
- a control method based on the simultaneous operation state of the second compressor mechanism 12 in the present system will be described.
- control calculation value (Nmo) of the compression capacity of the second compression mechanism 12 is the sum of the feedforward calculation value (NmoFF) and the feedback calculation value (NmoFB) as shown in the following equation.
- the value (NmoFF) is expressed by the following equation, for example, evaporator temperature target value (Toll), outside air temperature (Tamb), vehicle speed (VS), engine speed (Ne), blower (blower) voltage (BLV), etc. Is calculated.
- Nmo NmoFF + NmoFB
- NmoFF A X Toff + B X Tamb + C XVS + D X BLV
- A, B, C, and D are constants.
- the feedback operation value (NmoFB) is different from the operation value when the second compression mechanism is operated alone and when the simultaneous operation is performed by the first and second compression mechanisms.
- This is preferably performed by changing the proportional gain Kp when the feedback operation value (NmoFB) is calculated according to the following equation (FIG. 3, step S: 5) 0
- the feedback operation term of the second compression mechanism is The coefficient (proportional gain, etc.) related to the operation of the feedback operation term when the mechanism is used alone is changed to provide feedback suitable for simultaneous operation by the first and second compression mechanisms.
- NmoFB NmoP (proportional operation value) + Nmol (integral operation value)
- NmoP Kp X (Teva— Toff)
- Nmol NmoIn-l + Kp / Ti X (Teva—Toff)
- Kp is the proportional gain
- Ti is the integration time
- Nmoln-l is the previous calculated value of Nmol.
- the second compression mechanism 12 is started only by the feedforward operation value of the second compression mechanism 12. Then, the capacity is controlled, and for a predetermined time (T) (FIG. 3, step S6 [control delay time calculation]) determined in advance, the output of the feedback calculation term of the second compression mechanism 12 is limited or stopped, and After the lapse of the predetermined time (T) (after determining the lapse of the predetermined time (T) [FIG. 3, step S7]), the restriction on the feedback calculation term or the cancellation of the calculation stop is released, and the second compression mechanism by the feedforward and feedback is used. Capacity control can be performed (Fig. 3, step S8). An example of such a control flow is shown in FIG. That is, it is started by the feedforward control, and the feedback control is limited for a predetermined time or the calculation is stopped.
- the air conditioner according to the present invention can be suitably applied to any refrigeration cycle provided with a fixed capacity compression mechanism and a variable capacity compression mechanism that are independent of each other, and is particularly suitable for a cabin air conditioner of construction equipment having a large heat load fluctuation. It is optimal to apply.
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05709729A EP1717075A4 (en) | 2004-02-16 | 2005-02-04 | AIR CONDITIONER |
US10/598,034 US20080223058A1 (en) | 2004-02-16 | 2005-02-04 | Air Conditioner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-038595 | 2004-02-16 | ||
JP2004038595A JP4436152B2 (ja) | 2004-02-16 | 2004-02-16 | 空調装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005077689A1 true WO2005077689A1 (ja) | 2005-08-25 |
Family
ID=34857812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/001663 WO2005077689A1 (ja) | 2004-02-16 | 2005-02-04 | 空調装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080223058A1 (ja) |
EP (1) | EP1717075A4 (ja) |
JP (1) | JP4436152B2 (ja) |
WO (1) | WO2005077689A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4861900B2 (ja) * | 2007-02-09 | 2012-01-25 | サンデン株式会社 | 可変容量圧縮機の容量制御システム |
US9528727B2 (en) * | 2013-03-15 | 2016-12-27 | Whirlpool Corporation | Robust fixed-sequence control method and appliance for exceptional temperature stability |
US9989286B2 (en) * | 2013-12-17 | 2018-06-05 | Lennox Industries Inc. | Compressor operation management in air conditioners |
GB2547806B (en) * | 2017-02-28 | 2018-02-28 | Cotopaxi Ltd | System and method for controlling compressor operating capacity of a refrigeration plant |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63172863A (ja) * | 1987-01-12 | 1988-07-16 | ダイキン工業株式会社 | 冷凍装置の圧縮機容量制御装置 |
JPH05106931A (ja) * | 1991-04-30 | 1993-04-27 | Matsushita Refrig Co Ltd | 多室空調装置 |
JP2003019908A (ja) | 2001-07-06 | 2003-01-21 | Denso Corp | 車両用冷房装置 |
JP2003211953A (ja) * | 2002-01-23 | 2003-07-30 | Sanden Corp | 車両用空調装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03137457A (ja) * | 1989-10-20 | 1991-06-12 | Daikin Ind Ltd | 冷凍装置 |
JP3492849B2 (ja) * | 1996-05-01 | 2004-02-03 | サンデン株式会社 | 車両用空気調和装置 |
JP2001090667A (ja) * | 1999-09-21 | 2001-04-03 | Toyota Autom Loom Works Ltd | 可変容量型圧縮機の制御装置 |
JP4186361B2 (ja) * | 1999-12-22 | 2008-11-26 | 株式会社デンソー | 車両用空調装置 |
US6761037B2 (en) * | 2002-01-23 | 2004-07-13 | Sanden Corporation | Vehicle air conditioner using a hybrid compressor |
KR100487149B1 (ko) * | 2002-06-14 | 2005-05-03 | 삼성전자주식회사 | 공기 조화 장치 및 그 제어방법 |
-
2004
- 2004-02-16 JP JP2004038595A patent/JP4436152B2/ja not_active Expired - Fee Related
-
2005
- 2005-02-04 EP EP05709729A patent/EP1717075A4/en not_active Withdrawn
- 2005-02-04 US US10/598,034 patent/US20080223058A1/en not_active Abandoned
- 2005-02-04 WO PCT/JP2005/001663 patent/WO2005077689A1/ja not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63172863A (ja) * | 1987-01-12 | 1988-07-16 | ダイキン工業株式会社 | 冷凍装置の圧縮機容量制御装置 |
JPH05106931A (ja) * | 1991-04-30 | 1993-04-27 | Matsushita Refrig Co Ltd | 多室空調装置 |
JP2003019908A (ja) | 2001-07-06 | 2003-01-21 | Denso Corp | 車両用冷房装置 |
JP2003211953A (ja) * | 2002-01-23 | 2003-07-30 | Sanden Corp | 車両用空調装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1717075A4 |
Also Published As
Publication number | Publication date |
---|---|
JP2005225439A (ja) | 2005-08-25 |
EP1717075A1 (en) | 2006-11-02 |
EP1717075A4 (en) | 2008-05-21 |
US20080223058A1 (en) | 2008-09-18 |
JP4436152B2 (ja) | 2010-03-24 |
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