EP2916080A1 - Air-conditioning apparatus - Google Patents
Air-conditioning apparatus Download PDFInfo
- Publication number
- EP2916080A1 EP2916080A1 EP15153761.0A EP15153761A EP2916080A1 EP 2916080 A1 EP2916080 A1 EP 2916080A1 EP 15153761 A EP15153761 A EP 15153761A EP 2916080 A1 EP2916080 A1 EP 2916080A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- indoor
- air
- unit
- outdoor
- conditioning
- 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
- 238000004378 air conditioning Methods 0.000 title claims abstract description 54
- 239000003507 refrigerant Substances 0.000 claims abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 25
- 239000000758 substrate Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 2
- 230000000415 inactivating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/59—Remote control for presetting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
Definitions
- the present invention relates to an air-conditioning apparatus provided with a function to stop operation of an indoor unit through an outdoor unit upon conducting maintenance on the outdoor unit.
- a conventional air-conditioning apparatus is known that is provided with an operation manipulation switch so that any operation for starting refrigerant recovery, starting a trial run, or inactivating (stopping operation is performed depending on the ON time (length of time duration over which the operation manipulation switch is turned on) of the operation manipulation switch (see, e.g., Patent Literature 1).
- an outdoor unit is provided with a trial run switch and a stop switch so that a trial run is started when the trial run switch is turned on, while the trial run is stopped when the stop switch is turned on (see, e.g., Patent Literature 2).
- an outdoor unit is provided with a trial run switch so that the trial run switch makes a plurality of indoor units operate sequentially one by one (see, e.g., Patent Literature 3).
- the present invention is made to overcome the above-mentioned problems, and the first object thereof is to provide an air-conditioning apparatus that can stop operation of an indoor unit through an outdoor unit while conducting maintenance of the outdoor unit and can resume the operation.
- the second object thereof is to provide an air-conditioning apparatus that can make an indoor unit unable to be manipulated by a remote control when the operation of the indoor unit is inactivated while conducting maintenance of the outdoor unit.
- An air-conditioning apparatus includes: an outdoor unit; and an indoor unit that is connected to the outdoor unit via a refrigerant pipe and performs air-conditioning of an indoor space in combination with the outdoor unit based on manipulation of a remote control, wherein the outdoor unit includes: a stop switch and a return switch; and an outdoor control unit that, when the stop switch is turned on while the indoor space is being air-conditioned, stops operation of the indoor and outdoor units to stop performing air-conditioning of the indoor space, and that, when the return switch is turned on while the air-conditioning of the indoor space is inactivated by turning on the stop switch, resumes the operation of the indoor unit to perform air-conditioning of the indoor space in combination with the outdoor unit.
- the operation of the indoor and outdoor units is inactivated to stop performing air-conditioning of the indoor space
- the return switch is turned on while the air-conditioning of the indoor space is inactivated by turning on the stop switch
- the operation of the indoor unit is resumed to perform air-conditioning of the indoor space in combination with the outdoor unit.
- Fig. 1 is a circuit block diagram illustrating a schematic configuration of an outdoor unit and an indoor unit of an air-conditioning apparatus according to the first embodiment.
- An air-conditioning apparatus 100 includes an outdoor unit 1 and an indoor unit 11 connected to the outdoor unit 1 via a refrigerant pipe.
- the outdoor unit 1 is installed outdoors, and includes an outdoor control substrate 2, a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, an outdoor fan, and the like.
- the outdoor heat exchanger of the outdoor unit 1 serves as a condenser in the cooling operation or as an evaporator in the heating operation.
- the indoor unit 11 is installed indoors on the wall or ceiling, and includes an indoor control substrate 12, an indoor heat exchanger, an indoor fan, and the like.
- the indoor heat exchanger of the indoor unit 11 serves as an evaporator in the cooling operation or as a condenser in the heating operation.
- the outdoor control substrate 2 is implemented with a microcomputer 3 for controlling the outdoor unit, a maintenance manipulation unit 4 having a stop switch 4a to stop the operation of the air-conditioning apparatus 100 and a return-to-operation switch 4b to return to the operation thereof, an outdoor communication circuit 5, and the like.
- the microcomputer 3 includes an outdoor control unit for controlling operation of the compressor, switching of the four-way valve depending on either cooling or heating operation, an opening degree of the expansion valve, and operation of the outdoor fan.
- the microcomputer 3 when the operation of the indoor unit 11 is inactivated by turning on the stop switch 4a, i.e. the operation of the air-conditioning apparatus 100 is stopped, and then the return-to-operation switch 4b is turned on, the microcomputer 3 sends an operation return-to-operation signal to return to the operation of the indoor unit 11 to the indoor unit 11 via the outdoor communication circuit 5.
- the indoor control substrate 12 is implemented with a microcomputer 13 for controlling the indoor unit, an indoor communication circuit 14, a memory 15, and the like.
- the indoor control substrate 12 is connected with a remote control 16 via a communication line 17, the remote control 16 having operating buttons 16a for setting the air-conditioning of the indoor space and a liquid crystal display 16b.
- the communication line 17 is connected with the microcomputer 13 via the indoor control substrate 12.
- the remote control 16 is shown as a wired remote control, it may be a wireless remote control instead. If the remote control 16 is provided as a wireless remote control, the indoor control substrate 12 is implemented with a photodetector for receiving infrared radiation emitted from the remote control 16 to convert it to an electric signal to input into the microcomputer 13.
- the microcomputer 13 includes an indoor control unit to control the operation of the indoor fan depending on the degree of airflow set by the remote control 16.
- the microcomputer 13, when the stop signal from the outdoor communication circuit 5 is received via the indoor communication circuit 14, stores operating information in the memory 15, including a current operational state, an operational mode of e.g. either cooling or heating operation, a preset temperature of the indoor space, and the like, and stops the operation of the indoor unit 11.
- the microcomputer 13 when the return-to-operation signal from the outdoor communication circuit 5 is received via the indoor communication circuit 14, resumes the operation of the indoor unit 11 so as to return to the operational state before the stop based on the operating information stored in the memory 15, and sends the operating information to the outdoor communication circuit 5 via the indoor communication circuit 14 to cause the outdoor unit 1 to resume the operation.
- FIG. 2 is a flowchart illustrating operation of the air-conditioning apparatus based on manipulation of the maintenance manipulation unit of the outdoor unit shown in Fig. 1 .
- the flowchart on the left in this figure illustrates the operation of the outdoor unit 1
- the flowchart on the right illustrates the operation of the indoor unit 11.
- the microcomputer 3 of the outdoor unit 1 sends the stop signal to the indoor communication circuit 14 of the indoor unit 11 via the outdoor communication circuit 5 (S3).
- the microcomputer 3 stops the operation of the outdoor unit 1 (S4). Stopping the operation of the outdoor unit 1 corresponds to stopping the operation of the compressor, closing the expansion valve, and stopping the operation of the outdoor fan after stopping the operation of the indoor unit 11 as described below. At this point, maintenance of the outdoor unit 1 can be conducted.
- the microcomputer 3 determines whether the return-to-operation switch 4b of the maintenance manipulation unit 4 is turned on (S5), and, if the return-to-operation switch 4b is not turned on, waits until the return-to-operation switch 4b is turned on.
- the microcomputer 13 of the indoor unit 11 displays the disability of manipulation of the remote control 16 on the liquid crystal display 16b of the remote control 16 and disables the manipulation of the operating buttons 16a of the remote control 16 (S13, S14). This prevents the air-conditioning apparatus 100 from operating by manipulating the remote control while the outdoor unit 1 is in maintenance.
- the microcomputer 13 stores the operating information immediately before stopping the operation of the indoor unit 11 in the memory 15 (S15), and stops the operation of the indoor unit 11 (S16). Stopping the operation of the indoor unit 11 corresponds to stopping the operation of the indoor fan and closing a louver. Then, the microcomputer 13 determines whether the return-to-operation signal from the outdoor communication circuit 5 is received via the indoor communication circuit 14 (S17), and, if the return-to-operation signal is not received, waits until the return-to-operation signal is received.
- the microcomputer 3 determines whether the operating information immediately before the stop is received via the outdoor communication circuit 5 (S7), and, if the operating information is not received, waits until the operating information is received.
- the microcomputer 13 of the indoor unit 11 when the return-to-operation signal is received via the indoor communication circuit 14 while being in the waiting state at step S17, clears the disability notification of manipulation displayed on the liquid crystal display 16b (S18), and enables the manipulation of the operating buttons 16a of the remote control 16 (S19). Then, the microcomputer 13 retrieves the operating information immediately before the stop stored in the memory 15, and sends the operating information to the outdoor communication circuit 5 of the outdoor unit 1 via the indoor communication circuit 14 (S20). Next, the microcomputer 13 resumes the operation of the indoor unit 11 so as to return to the operational state before the stop based on the operating information (S21). In this case, the variable control of the louver, the operation of the indoor fan, and the like are performed based on the above-mentioned operating information.
- the microcomputer 3 of the outdoor unit 1 when the operating information is received via the outdoor communication circuit 5 while being in the waiting state at step S7, resumes the operation of the outdoor unit 1 based on the operating information (S8) so as to return to the air-conditioning state before the stop in combination with the indoor unit 11.
- the operation of the indoor unit 11 is inactivated along with the outdoor unit 1, and when the air-conditioning has been inactivated by turning on the stop switch 4a and then the return-to-operation switch 4b is turned on, the operation of the indoor unit 11 is resumed along with the outdoor unit 1.
- the operation of the indoor unit 11 can be inactivated and resumed without manipulating the remote control 16 of the indoor unit 11. This eliminates the necessity to manipulate the remote control 16 installed indoors to stop the operation from the indoor unit 11 side upon conducting maintenance on the outdoor unit 1, so that the time required for maintenance can be reduced. It also allows the maintenance to be conducted if it is impossible to enter indoors where the indoor unit 11 is installed.
- the air-conditioning is conducted in combination with the outdoor unit 1 so as to return to the operational state before the stop based on the operating information stored in the memory 15 immediately before the stop.
- the air-conditioning is conducted in the operating state before conducting the maintenance, so that it can eliminate the necessity of resetting by a user and provide better service of maintenance.
- the liquid crystal display 16b of the remote control 16 of the indoor unit 11 displays that the manipulation is disabled, and the manipulation of the remote control 16 is disabled. With this configuration, the outdoor unit 1 can be maintained safely.
- the second embodiment is configured so that, while the operation of the indoor unit 11 along with the outdoor unit 1 is inactivated by turning on the stop switch 4a, the manipulation of the return-to-operation switch 4b allows a trial run of the outdoor unit 1 and the indoor unit 11 to be performed or stopped.
- Fig. 3 illustrates a relation between ON time (time duration over which the operation manipulation switch is turned on) of the return switch and the operational mode of the air-conditioning apparatus according to the second embodiment.
- the configuration of the second embodiment is similar to that of the first embodiment as shown in Fig. 1 .
- the microcomputer 3 of the outdoor unit 1 includes an outdoor control unit which starts the trial run if ON time t of the return-to-operation switch 4b is longer than a first set time t1 and equal to or shorter than a second set time t2 (t1 ⁇ t ⁇ t2), and stops the trial run if, while the trial run has been performed, the ON time t of the return-to-operation switch 4b is longer than the second set time t2 (t2 ⁇ t).
- the trial run is performed when the outdoor unit 1 and the indoor unit 11 have been inactivated by turning on the stop switch 4a.
- This microcomputer 3 when determined that the trial run is to be performed based on the ON time t of the return-to-operation switch 4b, sends a trial run start signal for performing the trial run to the microcomputer 13 of the indoor unit 11 via the outdoor communication circuit 5 and the indoor communication circuit 14.
- the microcomputer 3 while the trial run has been performed and when determined that the trial run is to be inactivated based on the ON time t of the return-to-operation switch 4b, sends a trial run stop signal for stopping the trial run to the microcomputer 13 of the indoor unit 11 via the outdoor communication circuit 5 and the indoor communication circuit 14.
- the ON time t of the return-to-operation switch 4b is equal to or shorter than the first set time t1 (0 ⁇ t ⁇ t1)
- the operation of the indoor unit 11 which has been inactivated by turning on the stop switch 4a is resumed along with the outdoor unit 1, as in the first embodiment.
- the outdoor unit 1 and the indoor unit 11 operate based on the operating information immediately before the stop stored in the memory 15 with the indoor unit 11.
- the trial run can be performed in the state where the operation is inactivated and the manipulation of the remote control 16 is disabled on the outdoor unit 1 side, so that the maintenance can also be conducted smoothly and safely if it is impossible to enter indoors where the remote control 16 is installed.
- the trial run is started when the ON time t of the return-to-operation switch 4b is longer than the first set time t1 and equal to or shorter than the second set time t2, either operational mode of cooling or heating may be selected arbitrarily when performing the trial run.
- Fig. 4 is a circuit block diagram illustrating a schematic configuration of the outdoor unit in a variation of the second embodiment.
- the outdoor control substrate 2 of the outdoor unit 1 is provided with a DIP switch 18 for switching the operational mode to select either operational mode of cooling or heating by the DIP switch 18 before the trial run is performed with the return-to-operation switch 4b.
- a microcomputer 19 selects either operational mode of cooling or heating based on the switching operation of the DIP switch 18 in addition to the function of the microcomputer 3 as described in the second embodiment. This microcomputer 19 performs the selected operational mode (cooling or heating) when determined that the trial run is to be performed from the ON time t of the return-to-operation switch 4b (t1 ⁇ t ⁇ t2).
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
- The present invention relates to an air-conditioning apparatus provided with a function to stop operation of an indoor unit through an outdoor unit upon conducting maintenance on the outdoor unit.
- A conventional air-conditioning apparatus is known that is provided with an operation manipulation switch so that any operation for starting refrigerant recovery, starting a trial run, or inactivating (stopping operation is performed depending on the ON time (length of time duration over which the operation manipulation switch is turned on) of the operation manipulation switch (see, e.g., Patent Literature 1).
- Another example of the conventional air-conditioning apparatuses is that an outdoor unit is provided with a trial run switch and a stop switch so that a trial run is started when the trial run switch is turned on, while the trial run is stopped when the stop switch is turned on (see, e.g., Patent Literature 2).
- Further example of the conventional air-conditioning apparatuses is that an outdoor unit is provided with a trial run switch so that the trial run switch makes a plurality of indoor units operate sequentially one by one (see, e.g., Patent Literature 3).
- All of the air-conditioning apparatuses mentioned above presume that the operation of the air-conditioning apparatus is turned into a non-operating state; that is, after the operation is inactivated (or stopped; herein, "inactivate" and "stop" may be used interchangeably) by manipulating a remote control placed indoors, the apparatus is manipulated through the outdoor unit.
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- Patent Literature 1: Japanese Patent Laid-Open No.
2011-202924 FIGs. 1-3 ) - Patent Literature 2: Japanese Patent Laid-Open No.
2009-144990 Fig. 1 ) - Patent Literature 3: Japanese Patent Laid-Open No.
2001-324197 FIGs. 1 ,4 ) - As mentioned above, when stopping the operation of the conventional air-conditioning apparatus for maintenance, etc., it is required to perform the manipulation to stop the air-conditioning apparatus with a remote control installed indoors. For this reason, when conducting maintenance on the outdoor unit side, it is necessary for an operator to go back indoors to manipulate the remote control. There have been problems in that it may be substantially time-consuming to return to the operation depending on the installation conditions of the air-conditioning apparatus, and in that the operation of the indoor unit cannot be inactivated (stopped) if it is impossible to enter indoors where the indoor unit is installed.
- The present invention is made to overcome the above-mentioned problems, and the first object thereof is to provide an air-conditioning apparatus that can stop operation of an indoor unit through an outdoor unit while conducting maintenance of the outdoor unit and can resume the operation.
- The second object thereof is to provide an air-conditioning apparatus that can make an indoor unit unable to be manipulated by a remote control when the operation of the indoor unit is inactivated while conducting maintenance of the outdoor unit.
- An air-conditioning apparatus according to the present invention includes: an outdoor unit; and an indoor unit that is connected to the outdoor unit via a refrigerant pipe and performs air-conditioning of an indoor space in combination with the outdoor unit based on manipulation of a remote control, wherein the outdoor unit includes: a stop switch and a return switch; and an outdoor control unit that, when the stop switch is turned on while the indoor space is being air-conditioned, stops operation of the indoor and outdoor units to stop performing air-conditioning of the indoor space, and that, when the return switch is turned on while the air-conditioning of the indoor space is inactivated by turning on the stop switch, resumes the operation of the indoor unit to perform air-conditioning of the indoor space in combination with the outdoor unit.
- According to the present invention, when the stop switch is turned on while the indoor space is being air-conditioned, the operation of the indoor and outdoor units is inactivated to stop performing air-conditioning of the indoor space, and when the return switch is turned on while the air-conditioning of the indoor space is inactivated by turning on the stop switch, the operation of the indoor unit is resumed to perform air-conditioning of the indoor space in combination with the outdoor unit. With this configuration, the operation of the indoor unit can be inactivated and returned without manipulating the remote control of the indoor unit. This eliminates the labor to manipulate the remote control installed indoors to stop the operation from the indoor unit side upon conducting maintenance on the outdoor unit, so that the time required for maintenance can be reduced. It also allows the maintenance to be conducted if it is impossible to enter indoors where the indoor unit is installed.
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Fig. 1 is a circuit block diagram illustrating a schematic configuration of an outdoor unit and an indoor unit of an air-conditioning apparatus according to a first embodiment. -
Fig. 2 is a flowchart illustrating operation of the air-conditioning apparatus based on manipulation of a maintenance manipulation unit of the outdoor unit shown inFig. 1 . -
Fig. 3 illustrates a relation between ON time of a return switch and an operational mode of the air-conditioning apparatus according to a second embodiment. and -
Fig. 4 is a circuit block diagram illustrating a schematic configuration of an outdoor unit in a variation of the second embodiment. -
Fig. 1 is a circuit block diagram illustrating a schematic configuration of an outdoor unit and an indoor unit of an air-conditioning apparatus according to the first embodiment. - An air-
conditioning apparatus 100 includes anoutdoor unit 1 and anindoor unit 11 connected to theoutdoor unit 1 via a refrigerant pipe. Theoutdoor unit 1 is installed outdoors, and includes anoutdoor control substrate 2, a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, an outdoor fan, and the like. The outdoor heat exchanger of theoutdoor unit 1 serves as a condenser in the cooling operation or as an evaporator in the heating operation. Theindoor unit 11 is installed indoors on the wall or ceiling, and includes anindoor control substrate 12, an indoor heat exchanger, an indoor fan, and the like. The indoor heat exchanger of theindoor unit 11 serves as an evaporator in the cooling operation or as a condenser in the heating operation. - The
outdoor control substrate 2 is implemented with amicrocomputer 3 for controlling the outdoor unit, amaintenance manipulation unit 4 having astop switch 4a to stop the operation of the air-conditioning apparatus 100 and a return-to-operation switch 4b to return to the operation thereof, anoutdoor communication circuit 5, and the like. Themicrocomputer 3 includes an outdoor control unit for controlling operation of the compressor, switching of the four-way valve depending on either cooling or heating operation, an opening degree of the expansion valve, and operation of the outdoor fan. - The above-mentioned
microcomputer 3, when thestop switch 4a is turned on, sends a stop signal to stop the operation of theindoor unit 11 to theindoor unit 11 via theoutdoor communication circuit 5. In addition, when the operation of theindoor unit 11 is inactivated by turning on thestop switch 4a, i.e. the operation of the air-conditioning apparatus 100 is stopped, and then the return-to-operation switch 4b is turned on, themicrocomputer 3 sends an operation return-to-operation signal to return to the operation of theindoor unit 11 to theindoor unit 11 via theoutdoor communication circuit 5. - The
indoor control substrate 12 is implemented with amicrocomputer 13 for controlling the indoor unit, anindoor communication circuit 14, amemory 15, and the like. Theindoor control substrate 12 is connected with aremote control 16 via acommunication line 17, theremote control 16 havingoperating buttons 16a for setting the air-conditioning of the indoor space and aliquid crystal display 16b. Thecommunication line 17 is connected with themicrocomputer 13 via theindoor control substrate 12. - Although the
remote control 16 is shown as a wired remote control, it may be a wireless remote control instead. If theremote control 16 is provided as a wireless remote control, theindoor control substrate 12 is implemented with a photodetector for receiving infrared radiation emitted from theremote control 16 to convert it to an electric signal to input into themicrocomputer 13. - The
microcomputer 13 includes an indoor control unit to control the operation of the indoor fan depending on the degree of airflow set by theremote control 16. Themicrocomputer 13, when the stop signal from theoutdoor communication circuit 5 is received via theindoor communication circuit 14, stores operating information in thememory 15, including a current operational state, an operational mode of e.g. either cooling or heating operation, a preset temperature of the indoor space, and the like, and stops the operation of theindoor unit 11. - Moreover, the
microcomputer 13, when the return-to-operation signal from theoutdoor communication circuit 5 is received via theindoor communication circuit 14, resumes the operation of theindoor unit 11 so as to return to the operational state before the stop based on the operating information stored in thememory 15, and sends the operating information to theoutdoor communication circuit 5 via theindoor communication circuit 14 to cause theoutdoor unit 1 to resume the operation. - With reference to
Fig. 2 , the description is provided regarding the operation of theoutdoor unit 1 and theindoor unit 11 based on the manipulation of themaintenance manipulation unit 4 in the air-conditioning apparatus 100 configured as described above.
Fig. 2 is a flowchart illustrating operation of the air-conditioning apparatus based on manipulation of the maintenance manipulation unit of the outdoor unit shown inFig. 1 . Here, the flowchart on the left in this figure illustrates the operation of theoutdoor unit 1, while the flowchart on the right illustrates the operation of theindoor unit 11. - When the operation has been continued based on the manipulation of the remote control 16 (S1), and the
stop switch 4a of themaintenance manipulation unit 4 is turned on (S2), themicrocomputer 3 of theoutdoor unit 1 sends the stop signal to theindoor communication circuit 14 of theindoor unit 11 via the outdoor communication circuit 5 (S3). - Then, the
microcomputer 3 stops the operation of the outdoor unit 1 (S4). Stopping the operation of theoutdoor unit 1 corresponds to stopping the operation of the compressor, closing the expansion valve, and stopping the operation of the outdoor fan after stopping the operation of theindoor unit 11 as described below. At this point, maintenance of theoutdoor unit 1 can be conducted. Themicrocomputer 3 determines whether the return-to-operation switch 4b of themaintenance manipulation unit 4 is turned on (S5), and, if the return-to-operation switch 4b is not turned on, waits until the return-to-operation switch 4b is turned on. - On the other hand, when the operation has been continued based on the manipulation of the remote control 16 (S11), and the stop signal from the
outdoor communication circuit 5 is received via the indoor communication circuit 14 (S12), themicrocomputer 13 of theindoor unit 11 displays the disability of manipulation of theremote control 16 on theliquid crystal display 16b of theremote control 16 and disables the manipulation of theoperating buttons 16a of the remote control 16 (S13, S14). This prevents the air-conditioning apparatus 100 from operating by manipulating the remote control while theoutdoor unit 1 is in maintenance. - Next, the
microcomputer 13 stores the operating information immediately before stopping the operation of theindoor unit 11 in the memory 15 (S15), and stops the operation of the indoor unit 11 (S16). Stopping the operation of theindoor unit 11 corresponds to stopping the operation of the indoor fan and closing a louver. Then, themicrocomputer 13 determines whether the return-to-operation signal from theoutdoor communication circuit 5 is received via the indoor communication circuit 14 (S17), and, if the return-to-operation signal is not received, waits until the return-to-operation signal is received. - The
microcomputer 3 of theoutdoor unit 1, when the return-to-operation switch 4b is turned on while being in the waiting state at step S5, sends the return-to-operation signal to theindoor communication circuit 14 of theindoor unit 11 via the outdoor communication circuit 5 (S6). Next, themicrocomputer 3 determines whether the operating information immediately before the stop is received via the outdoor communication circuit 5 (S7), and, if the operating information is not received, waits until the operating information is received. - On the other hand, the
microcomputer 13 of theindoor unit 11, when the return-to-operation signal is received via theindoor communication circuit 14 while being in the waiting state at step S17, clears the disability notification of manipulation displayed on theliquid crystal display 16b (S18), and enables the manipulation of theoperating buttons 16a of the remote control 16 (S19). Then, themicrocomputer 13 retrieves the operating information immediately before the stop stored in thememory 15, and sends the operating information to theoutdoor communication circuit 5 of theoutdoor unit 1 via the indoor communication circuit 14 (S20). Next, themicrocomputer 13 resumes the operation of theindoor unit 11 so as to return to the operational state before the stop based on the operating information (S21). In this case, the variable control of the louver, the operation of the indoor fan, and the like are performed based on the above-mentioned operating information. - The
microcomputer 3 of theoutdoor unit 1, when the operating information is received via theoutdoor communication circuit 5 while being in the waiting state at step S7, resumes the operation of theoutdoor unit 1 based on the operating information (S8) so as to return to the air-conditioning state before the stop in combination with theindoor unit 11. - As described above, according to the first embodiment, when the
stop switch 4a of theoutdoor unit 1 is turned on, the operation of theindoor unit 11 is inactivated along with theoutdoor unit 1, and when the air-conditioning has been inactivated by turning on thestop switch 4a and then the return-to-operation switch 4b is turned on, the operation of theindoor unit 11 is resumed along with theoutdoor unit 1. With this configuration, the operation of theindoor unit 11 can be inactivated and resumed without manipulating theremote control 16 of theindoor unit 11. This eliminates the necessity to manipulate theremote control 16 installed indoors to stop the operation from theindoor unit 11 side upon conducting maintenance on theoutdoor unit 1, so that the time required for maintenance can be reduced. It also allows the maintenance to be conducted if it is impossible to enter indoors where theindoor unit 11 is installed. - When the
indoor unit 11 resumes its operation, the air-conditioning is conducted in combination with theoutdoor unit 1 so as to return to the operational state before the stop based on the operating information stored in thememory 15 immediately before the stop. With this configuration, the air-conditioning is conducted in the operating state before conducting the maintenance, so that it can eliminate the necessity of resetting by a user and provide better service of maintenance. - Moreover, while the
outdoor unit 1 is in maintenance, theliquid crystal display 16b of theremote control 16 of theindoor unit 11 displays that the manipulation is disabled, and the manipulation of theremote control 16 is disabled. With this configuration, theoutdoor unit 1 can be maintained safely. - The second embodiment is configured so that, while the operation of the
indoor unit 11 along with theoutdoor unit 1 is inactivated by turning on thestop switch 4a, the manipulation of the return-to-operation switch 4b allows a trial run of theoutdoor unit 1 and theindoor unit 11 to be performed or stopped. -
Fig. 3 illustrates a relation between ON time (time duration over which the operation manipulation switch is turned on) of the return switch and the operational mode of the air-conditioning apparatus according to the second embodiment. The configuration of the second embodiment is similar to that of the first embodiment as shown inFig. 1 . - In the second embodiment, the
microcomputer 3 of theoutdoor unit 1 includes an outdoor control unit which starts the trial run if ON time t of the return-to-operation switch 4b is longer than a first set time t1 and equal to or shorter than a second set time t2 (t1 < t ≤ t2), and stops the trial run if, while the trial run has been performed, the ON time t of the return-to-operation switch 4b is longer than the second set time t2 (t2 < t). The trial run is performed when theoutdoor unit 1 and theindoor unit 11 have been inactivated by turning on thestop switch 4a. - This
microcomputer 3, when determined that the trial run is to be performed based on the ON time t of the return-to-operation switch 4b, sends a trial run start signal for performing the trial run to themicrocomputer 13 of theindoor unit 11 via theoutdoor communication circuit 5 and theindoor communication circuit 14. In addition, themicrocomputer 3, while the trial run has been performed and when determined that the trial run is to be inactivated based on the ON time t of the return-to-operation switch 4b, sends a trial run stop signal for stopping the trial run to themicrocomputer 13 of theindoor unit 11 via theoutdoor communication circuit 5 and theindoor communication circuit 14. - Moreover, when the ON time t of the return-to-
operation switch 4b is equal to or shorter than the first set time t1 (0 < t ≤ t1), the operation of theindoor unit 11 which has been inactivated by turning on thestop switch 4a is resumed along with theoutdoor unit 1, as in the first embodiment. Upon resuming the operation, theoutdoor unit 1 and theindoor unit 11 operate based on the operating information immediately before the stop stored in thememory 15 with theindoor unit 11. - As described above, according to the second embodiment, the trial run can be performed in the state where the operation is inactivated and the manipulation of the
remote control 16 is disabled on theoutdoor unit 1 side, so that the maintenance can also be conducted smoothly and safely if it is impossible to enter indoors where theremote control 16 is installed. - While in the second embodiment the trial run is started when the ON time t of the return-to-
operation switch 4b is longer than the first set time t1 and equal to or shorter than the second set time t2, either operational mode of cooling or heating may be selected arbitrarily when performing the trial run. -
Fig. 4 is a circuit block diagram illustrating a schematic configuration of the outdoor unit in a variation of the second embodiment. As shown in the figure, theoutdoor control substrate 2 of theoutdoor unit 1 is provided with aDIP switch 18 for switching the operational mode to select either operational mode of cooling or heating by theDIP switch 18 before the trial run is performed with the return-to-operation switch 4b. - A
microcomputer 19 selects either operational mode of cooling or heating based on the switching operation of theDIP switch 18 in addition to the function of themicrocomputer 3 as described in the second embodiment. Thismicrocomputer 19 performs the selected operational mode (cooling or heating) when determined that the trial run is to be performed from the ON time t of the return-to-operation switch 4b (t1 < t ≤ t2). - 1 outdoor unit, 2 outdoor control substrate, 3 microcomputer, 4 maintenance manipulation unit, 4a stop switch, 4b return switch, 5 outdoor communication circuit, 11 indoor unit, 12 indoor control substrate, 13 microcomputer, 14 indoor communication circuit, 15 memory, 16 remote control, 16a operating button, 16b liquid crystal display, 17 communication line, 18 DIP switch, 19 microcomputer, 100 air-conditioning apparatus.
Claims (5)
- An air-conditioning apparatus comprising:an outdoor unit (1); andan indoor unit (11) that is connected to the outdoor unit (1) via a refrigerant pipe and performs air-conditioning of an indoor space in combination with the outdoor unit (1) based on manipulation of a remote control (16),wherein the outdoor unit (1) comprises:a stop switch (4a) and a return-to-operation switch (4b); andan outdoor control unit (3) that, when the stop switch (4a) is turned on while the indoor space is being air-conditioned, stops operation of the indoor and outdoor units (1) to stop performing air-conditioning of the indoor space, and that, when the return-to-operation switch (4b) is turned on while the air-conditioning of the indoor space is inactivated by turning on the stop switch (4a), resumes the operation of the indoor unit (11) to perform air-conditioning of the indoor space in combination with the outdoor unit (1).
- The air-conditioning apparatus of claim 1, wherein the indoor unit (11) comprises an indoor control unit (13) that disables manipulation of the remote control (16) when the operation is inactivated by turning on the stop switch (4a).
- The air-conditioning apparatus of claim 2, wherein, when the manipulation of the remote control (16) is disabled, the indoor control unit (13) displays a notification that represents that the manipulation is disabled on a display (16b) of the remote control (16).
- The air-conditioning apparatus of claim 2 or 3, wherein the indoor control unit (13), when stopping performance of air-conditioning of the indoor space by turning on the stop switch (4a), holds operating information before the stop, and, when resuming the operation by turning on the return-to-operation switch (4b), returns to an operational state before the stop based on the operating information, so as to perform the air-conditioning of the indoor space in combination with the outdoor unit (1).
- The air-conditioning apparatus of any one of claims 1 to 4, wherein the outdoor control unit (3) starts a trial run when the operation is in an inactivated state due to turning on the stop switch (4a) and if ON time of the return-to-operation switch (4b) is longer than a first set time and equal to or shorter than a second set time, the second set time being longer than the first set time, and stops the trial run when the trial run has been performed and if the ON time of the return-to-operation switch (4b) is longer than the second set time.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014045107A JP2015169386A (en) | 2014-03-07 | 2014-03-07 | Air conditioner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2916080A1 true EP2916080A1 (en) | 2015-09-09 |
EP2916080B1 EP2916080B1 (en) | 2022-10-19 |
Family
ID=52446268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP15153761.0A Active EP2916080B1 (en) | 2014-03-07 | 2015-02-04 | Air-conditioning apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US20150253031A1 (en) |
EP (1) | EP2916080B1 (en) |
JP (1) | JP2015169386A (en) |
CN (2) | CN204704926U (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2018016039A1 (en) * | 2016-07-20 | 2018-01-25 | 三菱電機株式会社 | Air-conditioning system |
CN111412636B (en) * | 2020-04-07 | 2021-05-25 | 珠海格力电器股份有限公司 | Air conditioner without communication circuit between indoor unit and outdoor unit and control method thereof |
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Also Published As
Publication number | Publication date |
---|---|
CN104896580B (en) | 2018-05-25 |
CN104896580A (en) | 2015-09-09 |
CN204704926U (en) | 2015-10-14 |
JP2015169386A (en) | 2015-09-28 |
US20150253031A1 (en) | 2015-09-10 |
EP2916080B1 (en) | 2022-10-19 |
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