US20170248336A1 - Outdoor unit - Google Patents
Outdoor unit Download PDFInfo
- Publication number
- US20170248336A1 US20170248336A1 US15/594,161 US201715594161A US2017248336A1 US 20170248336 A1 US20170248336 A1 US 20170248336A1 US 201715594161 A US201715594161 A US 201715594161A US 2017248336 A1 US2017248336 A1 US 2017248336A1
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- US
- United States
- Prior art keywords
- outdoor unit
- information terminal
- data
- outdoor
- unit
- 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.)
- Abandoned
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- 238000004891 communication Methods 0.000 claims abstract description 63
- 238000009423 ventilation Methods 0.000 claims description 26
- 238000003745 diagnosis Methods 0.000 claims description 17
- 238000013459 approach Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005674 electromagnetic induction Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 32
- 230000008569 process Effects 0.000 description 31
- 238000004378 air conditioning Methods 0.000 description 15
- 238000005057 refrigeration Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F24F11/006—
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
-
- 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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
-
- 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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F24F11/32—Responding to malfunctions or emergencies
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- F24F2011/0052—
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- F24F2011/0063—
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- F24F2011/0068—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/32—Details or features not otherwise provided for preventing human errors during the installation, use or maintenance, e.g. goofy proof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/44—Protection from terrorism or theft
Definitions
- Embodiments described herein relate generally to an outdoor unit for a refrigeration cycle apparatus such as an air conditioning apparatus.
- a transmitter-receiver having a function of near-field communication is provided in the outdoor unit of a refrigeration cycle apparatus such as an air conditioning apparatus.
- Contactless data communication is performed between the transmitter-receiver and an information terminal to set various types of data related to the operation of the outdoor unit and diagnose the state of the outdoor unit.
- the administrator or serviceman of the air conditioning apparatus can perform the above setting or diagnosis by coming close to the outdoor unit of the air conditioning apparatus and holding an information terminal close to the transmitter-receiver of the outdoor unit.
- Embodiments described herein aim to provide an outdoor unit which can avoid an unauthorized change to the preset data and is excellent in security and reliability.
- FIG. 1 shows an external appearance according to one embodiment.
- FIG. 2 is a block diagram showing a control circuit according to the embodiment.
- FIG. 3 is a flowchart showing the control of a controller according to the embodiment.
- an outdoor unit comprises a communication unit and a controller.
- the communication unit performs contactless data communication with an information terminal close to the outdoor unit.
- the controller permits data setting from the information terminal via the communication unit only for a certain period after the outdoor unit is turned on.
- the outline of an outdoor unit 1 is formed by a cubic housing 2 .
- the housing 2 includes front plates 3 and 4 , a right side plate 5 , top plates 6 and 7 , a left side plate, a rear plate, and a bottom plate.
- Front plates 3 and 4 , the right side plate 5 , the left side plate, the rear plate and the bottom plate are formed of metal, excluding top plates 6 and 7 .
- Front plate 3 is divided into an upper front plate 3 A and a lower front plate 3 B in a vertical direction. Each of upper and lower front plates 3 A and 3 B is removable.
- Upper front plate 3 A comprises a large number of rectangular ventilation openings (inlets) 3 a which are vertically and horizontally arranged.
- Front plate 4 is divided into an upper front plate 4 A and a lower front plate 4 B in a vertical direction in a manner similar to that of front plate 3 .
- Each of upper and lower front plates 4 A and 4 B is removable.
- Upper front plate 4 A comprises a large number of rectangular ventilation openings (inlets) 4 a arranged in a vertical direction.
- the right side plate 5 comprises a large number of rectangular ventilation openings (inlets) 5 a which are vertically and horizontally arranged.
- the left side plate comprises a large number of ventilation openings (inlets) which are vertically and horizontally arranged in a manner similar to that of the right side plate 5 .
- Each of top plates 6 and 7 comprises a circular ventilation opening.
- Cylindrical fan housings 8 and 9 are formed so as to cover the ventilation openings of top plates 6 and 7 , respectively.
- the inside of the housing 2 is divided into an upper heat exchange chamber 2 A and a lower machinery chamber 2 B by an intermediate divider 2 x.
- the heat exchange chamber 2 A is closed by upper front plates 3 A and 4 A.
- the machinery chamber 2 B is closed by lower front plates 3 B and 4 B.
- An outdoor heat exchanger 10 and outdoor fans 11 and 12 are housed in the heat exchange chamber 2 A.
- the outdoor heat exchanger 10 has a U-shape as seen in plan view.
- the outdoor heat exchanger 10 is placed on the intermediate divider 2 x along the left side plate, upper front plates 3 A and 4 A and the right side plate 5 of the housing 2 such that the outdoor heat exchanger 10 is close to these plates.
- the internal space of the outdoor heat exchanger 10 communicates with fan housings 8 and 9 via the ventilation openings of top plates 6 and 7 , respectively.
- Outdoor fans 11 and 12 are provided at positions corresponding to fan housings 8 and 9 .
- Refrigeration cycle constituting components 30 and an electrical component box 40 are housed in the machinery chamber 2 B.
- the refrigeration cycle constituting components 30 collectively mean a compressor, a four-way valve, a receiver tank, an accumulator, etc.
- the electrical component box 40 houses a plurality of drive circuits which drive the compressor, outdoor fans 11 and 12 , etc., and a circuit board 41 .
- the internal components of the machinery chamber 2 B are exchanged or fixed by removing lower front plates 3 B and 4 B.
- outdoor fans 11 and 12 rotate, external air is drawn into the heat exchange chamber 2 A through the ventilation openings of the left side plate, ventilation openings 3 a and 4 a of upper front plates 3 B and 4 B and ventilation openings 5 a of the right side plate 5 .
- the drawn air passes through the outdoor heat exchanger 10 , and further goes through outdoor fans 11 and 12 and fan housings 8 and 9 . Subsequently, the air is discharged to the outside of the housing 2 .
- the air passing through the outdoor heat exchanger 10 exchanges heat with a refrigerant flowing through the outdoor heat exchanger 10 .
- a communication unit 20 is provided at a position corresponding to, of ventilation openings 4 a of upper front plate 4 A, for example, the second ventilation opening 4 a from the top, between upper front plate 4 A of the housing 2 and the outdoor heat exchanger 10 .
- the height position of the second ventilation opening 4 a from the top is substantially equivalent to the eye level of a worker standing next to the housing 2 .
- the communication unit 20 When an information terminal 100 is close to the communication unit 20 within a very short distance of each other, for example, within approximately 1 to 10 cm of each other, the communication unit 20 operates with the electricity generated by electromagnetic induction due to radio waves transmitted from the information terminal 100 , and performs contactless data communication with the information terminal 100 , using the near-field communication (NFC) technology.
- the communication unit 20 includes an antenna 21 , a transmitter-receiver 22 , a CPU 23 , a memory 24 and a communication circuit 25 .
- the antenna 21 transmits or receives radio waves to/from the nearby information terminal 100 .
- the transmitter-receiver 22 transmits or receives a signal through the antenna 21 , and loads the radio waves received in the antenna 21 as the operation power of the communication unit 20 .
- the CPU 23 performs various processes for data communication.
- the memory 24 stores a program necessary to control the CPU 23 , and temporarily stores received data and transmitted data.
- the communication circuit 25 performs data communication between the CPU 23 and a controller 42 via a signal line.
- An outside air temperature sensor which detects outside air temperature is also housed in the communication unit 20 .
- the controller 42 controls the operation of the refrigeration cycle constituting components 30 and the drive circuits of the outdoor unit 1 in cooperation with an indoor unit included in the air conditioning apparatus as well as the outdoor unit 1 .
- the controller 42 is provided on the circuit board 41 of the machinery chamber 2 B as well as a power circuit 43 .
- the power circuit 43 is connected to a commercial AC source 50 provided in a building via a supply cable, and loads the AC voltage of the commercial AC source 50 as the operation power of the outdoor unit 1 .
- the users, and the administrator and the serviceman of the air conditioning apparatus can easily enter the building in which the commercial AC source 50 is provided.
- the other people cannot enter the building.
- the security of the building in which the commercial AC source 50 is provided is controlled. Only the registered users, and the administrator and serviceman of the air conditioning apparatus can enter the building.
- the operation for turning the commercial AC source 50 on and off can be performed by the users, and the administrator and serviceman of the air conditioning apparatus. However, this operation cannot be performed by the other people.
- the controller 42 includes a first control section 42 a, a second control section 42 b, a third control section 42 c, a fourth control section 42 d and a memory 42 e as main functions related to the data setting and diagnosis for the outdoor unit 1 .
- the first control section 42 a permits data setting from the information terminal 100 via the communication unit 20 only for a certain period t 1 s after the outdoor unit 1 (the commercial AC source 50 ) is turned on. Specifically, the first control section 42 a receives data input from the information terminal 100 via the communication unit 20 only for a certain period t 1 s after the outdoor unit 1 is turned on.
- the second control section 42 b When the received data is data related to the operation of the outdoor unit 1 , the second control section 42 b performs a data setting process for setting the data as the operation data of the outdoor unit 1 .
- the process for setting the operation data is completed by the update and storage in the memory 42 e.
- the third control section 42 c performs a diagnosis process for diagnosing the state of the outdoor unit 1 and notifying the information terminal 100 of the diagnosis via the communication unit 20 .
- the fourth control section 42 d notifies the information terminal 100 of the fact via the communication unit 20 .
- the fourth control section 42 d receives an instruction to extend the period from the information terminal 100 in response to the notification via the communication unit 20 , the fourth control section 42 d extends the certain period t 1 s.
- the administrator or serviceman of the air conditioning apparatus sets data related to the operation of the outdoor unit 1 or diagnoses the state of the outdoor unit 1 .
- the administrator or serviceman of the air conditioning apparatus enters the building in which the commercial AC source 50 is provided, and turns the commercial AC source 50 on.
- the administrator or serviceman of the air conditioning apparatus is hereinafter referred to as a worker.
- the controller 42 When the commercial AC source 50 is turned on (power-on; YES in step S 1 ), the controller 42 starts a time count t 1 from zero (step S 2 ), and compares the time count t 1 with a predetermined certain period (default value) t 1 s (step S 3 ).
- the certain period t 1 s includes a sufficient time for a worker to perform operation necessary for the above data setting process and the diagnosis process, and is set to, for example, approximately five to eight hours.
- the controller 42 permits a data setting process and a diagnosis process based on data communication between the information terminal 100 and the communication unit 20 (step S 4 ).
- the worker can perform operation necessary for a data setting process and operation necessary for a diagnosis process.
- the worker comes close to upper front plate 4 A of the housing 2 , and holds the information terminal 100 close to the second ventilation opening 4 a of upper front plate 4 A from the top.
- the worker operates the information terminal 100 close to the ventilation opening 4 a and performs contactless data communication between the information terminal 100 and the communication unit 20 .
- the information terminal 100 for example, a tablet information terminal or a smartphone information terminal is used.
- the controller 42 receives data input from the information terminal 100 via the communication unit 20 .
- the controller 42 performs a data setting process for setting the received data as the operation data of the outdoor unit 1 .
- the controller 42 performs a diagnosis process for diagnosing the state of the outdoor unit 1 and notifying the information terminal 100 of the diagnosis via the communication unit 20 .
- the operation data set by the above data setting process includes, for example, various parameters related to the operation of the outdoor unit 1 (for example, outside air temperature, refrigerant temperature, the operating frequency of the compressor, and the address codes of a plurality of indoor units), and a control program (for example, firmware) for controlling the operation of the outdoor unit 1 .
- the state diagnosed by the above diagnosis process includes, for example, the operation history of the outdoor unit 1 , and the details of failure of the outdoor unit 1 .
- the operation for a data setting process and the operation for a diagnosis process can be sufficiently completed within the certain period t 1 s if no problem occurs in the procedure of the operation, etc.
- the controller 42 determines whether or not the time count t 1 has reached a predetermined period “t 1 s ⁇ ta” less than the certain period t 1 s by period ⁇ ta (step S 5 ).
- Period ⁇ ta is set to notify the worker that the time count t 1 is close to the certain period t 1 s.
- Period ⁇ ta is, for example, approximately five minutes.
- the controller 42 returns to step S 3 and continues to compare the time count t 1 with the certain period t 1 s.
- step S 5 When the time count t 1 has reached the predetermined period “t 1 s- ⁇ ta” (YES in step S 5 ), the controller 42 notifies the information terminal 100 that the end of the process permissible period approaches via the communication unit 20 (step S 6 ).
- the information terminal 100 After the reception of the notification, the information terminal 100 notifies the worker that the end of the process permissible period is close by displaying an image or producing beep sound. After the reception of the notification, the worker determines whether or not the current operation can be completed by the end of the process permissible period.
- the worker determines that the current operation cannot be completed by the end of the operation permissible period, the worker instructs the controller 42 to extend the period from the information terminal 100 via the communication unit 20 .
- the controller 42 receives the instruction to extend the period (YES in step S 7 )
- the controller 42 adds period ⁇ tb (> ⁇ ta) to the certain period t 1 s, and sets t 1 s+ ⁇ tb as a new certain period t 1 s (step S 8 ).
- Period ⁇ tb is, for example, one hour.
- the controller 42 returns to step S 3 and continues to compare the time count t 1 with the new certain period t 1 s.
- the controller 42 does not receive an instruction to extend the period (NO in step S 7 ). Thus, the controller 42 returns to step S 3 and continues to compare the time count t 1 with the certain period (default value) t 1 s without updating the certain period t 1 s.
- step S 9 the controller 42 prohibits a data setting process based on data communication between the information terminal 100 and the communication unit 20 (step S 9 ).
- a diagnosis process based on data communication between the information terminal 100 and the communication unit 20 may be continuously permitted, or may be prohibited in addition to a data setting process.
- a data setting process is prohibited after the time count t 1 has reached the certain period t 1 s.
- data cannot be set for the outdoor unit 1 even if a third party performs data communication with the communication unit 20 from his/her information terminal 100 .
- it is possible to enhance the security and reliability for unauthorized access from a third party. Even if a third party tries to make an unauthorized change to the preset data of the outdoor unit 1 , the change can be prevented.
- the outdoor unit 1 is provided outside, and anyone can come close to the outdoor unit 1 .
- data communication using the NFC technology does not require a coupling process for establishing communication with the information terminal 100 .
- the time count t 1 may reach the certain period t 1 s, and the process may be prohibited. In this case, the worker should merely enter the building, turn the commercial AC source 50 off (power-off), and turn it on again (power-on).
- the controller 42 monitors the shutdown (power-off) of the commercial AC source 50 (YES in step S 10 ).
- the controller 42 stores, in the memory 42 d, the processing content of the controller 42 immediately before the shutdown of the commercial AC source 50 (step S 11 ), and sets the certain period ts 1 to the default value (step S 12 ).
- the controller 42 returns to step S 1 and monitors power-on.
- step S 1 When the commercial AC source 50 is turned on again (power-on) (YES in step S 1 ), the controller 42 repeats the process from step S 2 . In this case, the controller 42 continuously restarts the data setting process stopped by the above prohibition based on the processing content stored in the memory 42 d. In this manner, the worker can complete the operation for the data setting process.
- the radio waves emitted from the information terminal 100 are not disturbed by magnetic upper front plate 4 A and effectively reach the communication unit 20 through ventilation openings 4 a.
- the radio waves emitted from the communication unit 20 are not disturbed by magnetic upper front plate 4 A and effectively reach the information terminal 100 through ventilation openings 4 a.
- the worker merely holds the information terminal 100 close to ventilation opening 4 a and operates the information terminal 100 . There is no need to remove upper front plate 4 A and attach it again. Thus, no complicated work is required. In this way, the workload of the worker can be reduced, and the working time can be reduced.
- the communication unit 20 is provided at a position corresponding to the second ventilation opening 4 a of upper front plate 4 A from the top.
- the height position is not limited to this example, and can be appropriately determined.
- the communication unit 20 may be provided at a position corresponding to a lower ventilation opening 4 a as the internal side is difficult to see as a matter of course.
- the certain period t 1 s is set to approximately five to eight hours.
- the certain period t 1 s may be appropriately determined based on the type and the number of outdoor units 1 , and the experience or skill of the worker.
- a data setting process is prohibited at the end of the certain period t 1 s after the power-on.
- a process for reading data which should not be seen by third parties can be prohibited at the end of the certain period t 1 s after the power-on in addition to the prohibition of the data setting process.
- an outdoor unit for an air conditioning apparatus as an outdoor unit for a refrigeration cycle apparatus.
- the embodiment is not limited to an outdoor unit for an air conditioning apparatus.
- the embodiment may be applied to, for example, an air-cooled chilling unit, a heat source unit for a heat-pump water heater, a heat source unit for a heat-pump warming apparatus, and a refrigerator connected to a refrigerated showcase.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
- This application is a Continuation Application of PCT Application No. PCT/JP2015/082135, filed Nov. 16, 2015 and based upon and claiming the benefit of priority from Japanese Patent Application No. 2014-234413, field Nov. 19, 2014, the entire contents of all of which are incorporated herein by reference.
- Embodiments described herein relate generally to an outdoor unit for a refrigeration cycle apparatus such as an air conditioning apparatus.
- There is a known setting-diagnosis system. In the system, a transmitter-receiver having a function of near-field communication (NEC). is provided in the outdoor unit of a refrigeration cycle apparatus such as an air conditioning apparatus. Contactless data communication is performed between the transmitter-receiver and an information terminal to set various types of data related to the operation of the outdoor unit and diagnose the state of the outdoor unit.
- The administrator or serviceman of the air conditioning apparatus can perform the above setting or diagnosis by coming close to the outdoor unit of the air conditioning apparatus and holding an information terminal close to the transmitter-receiver of the outdoor unit. (JP 5197549 B)
- Since the above outdoor unit is provided outside, anyone can approach the outdoor unit as well as the administrator and serviceman. Thus, there is a possibility that a malicious third party approaches the outdoor unit and makes an unauthorized change to the preset data.
- Embodiments described herein aim to provide an outdoor unit which can avoid an unauthorized change to the preset data and is excellent in security and reliability.
-
FIG. 1 shows an external appearance according to one embodiment. -
FIG. 2 is a block diagram showing a control circuit according to the embodiment. -
FIG. 3 is a flowchart showing the control of a controller according to the embodiment. - In general, according to one embodiment, an outdoor unit comprises a communication unit and a controller. The communication unit performs contactless data communication with an information terminal close to the outdoor unit. The controller permits data setting from the information terminal via the communication unit only for a certain period after the outdoor unit is turned on.
- An embodiment will be explained below.
- As shown in
FIG. 1 , the outline of anoutdoor unit 1 is formed by acubic housing 2. Thehousing 2 includesfront plates 3 and 4, aright side plate 5,top plates Front plates 3 and 4, theright side plate 5, the left side plate, the rear plate and the bottom plate are formed of metal, excludingtop plates - Front plate 3 is divided into an
upper front plate 3A and alower front plate 3B in a vertical direction. Each of upper andlower front plates Upper front plate 3A comprises a large number of rectangular ventilation openings (inlets) 3 a which are vertically and horizontally arranged.Front plate 4 is divided into anupper front plate 4A and alower front plate 4B in a vertical direction in a manner similar to that of front plate 3. Each of upper andlower front plates Upper front plate 4A comprises a large number of rectangular ventilation openings (inlets) 4 a arranged in a vertical direction. Theright side plate 5 comprises a large number of rectangular ventilation openings (inlets) 5 a which are vertically and horizontally arranged. The left side plate comprises a large number of ventilation openings (inlets) which are vertically and horizontally arranged in a manner similar to that of theright side plate 5. Each oftop plates Cylindrical fan housings top plates - The inside of the
housing 2 is divided into an upperheat exchange chamber 2A and alower machinery chamber 2B by anintermediate divider 2 x. Theheat exchange chamber 2A is closed byupper front plates machinery chamber 2B is closed bylower front plates - An
outdoor heat exchanger 10 andoutdoor fans heat exchange chamber 2A. Theoutdoor heat exchanger 10 has a U-shape as seen in plan view. Theoutdoor heat exchanger 10 is placed on theintermediate divider 2 x along the left side plate,upper front plates right side plate 5 of thehousing 2 such that theoutdoor heat exchanger 10 is close to these plates. The internal space of theoutdoor heat exchanger 10 communicates withfan housings top plates Outdoor fans fan housings - Refrigeration
cycle constituting components 30 and anelectrical component box 40 are housed in themachinery chamber 2B. The refrigerationcycle constituting components 30 collectively mean a compressor, a four-way valve, a receiver tank, an accumulator, etc. Theelectrical component box 40 houses a plurality of drive circuits which drive the compressor,outdoor fans circuit board 41. For example, the internal components of themachinery chamber 2B are exchanged or fixed by removinglower front plates - When
outdoor fans heat exchange chamber 2A through the ventilation openings of the left side plate,ventilation openings upper front plates ventilation openings 5 a of theright side plate 5. The drawn air passes through theoutdoor heat exchanger 10, and further goes throughoutdoor fans fan housings housing 2. The air passing through theoutdoor heat exchanger 10 exchanges heat with a refrigerant flowing through theoutdoor heat exchanger 10. - A
communication unit 20 is provided at a position corresponding to, ofventilation openings 4 a ofupper front plate 4A, for example, the second ventilation opening 4 a from the top, betweenupper front plate 4A of thehousing 2 and theoutdoor heat exchanger 10. The height position of the second ventilation opening 4 a from the top is substantially equivalent to the eye level of a worker standing next to thehousing 2. - When an
information terminal 100 is close to thecommunication unit 20 within a very short distance of each other, for example, within approximately 1 to 10 cm of each other, thecommunication unit 20 operates with the electricity generated by electromagnetic induction due to radio waves transmitted from theinformation terminal 100, and performs contactless data communication with theinformation terminal 100, using the near-field communication (NFC) technology. As shown inFIG. 2 , thecommunication unit 20 includes anantenna 21, a transmitter-receiver 22, aCPU 23, amemory 24 and acommunication circuit 25. - The
antenna 21 transmits or receives radio waves to/from thenearby information terminal 100. The transmitter-receiver 22 transmits or receives a signal through theantenna 21, and loads the radio waves received in theantenna 21 as the operation power of thecommunication unit 20. TheCPU 23 performs various processes for data communication. Thememory 24 stores a program necessary to control theCPU 23, and temporarily stores received data and transmitted data. Thecommunication circuit 25 performs data communication between theCPU 23 and a controller 42 via a signal line. - An outside air temperature sensor which detects outside air temperature is also housed in the
communication unit 20. - The controller 42 controls the operation of the refrigeration
cycle constituting components 30 and the drive circuits of theoutdoor unit 1 in cooperation with an indoor unit included in the air conditioning apparatus as well as theoutdoor unit 1. The controller 42 is provided on thecircuit board 41 of themachinery chamber 2B as well as apower circuit 43. Thepower circuit 43 is connected to acommercial AC source 50 provided in a building via a supply cable, and loads the AC voltage of thecommercial AC source 50 as the operation power of theoutdoor unit 1. - The users, and the administrator and the serviceman of the air conditioning apparatus can easily enter the building in which the
commercial AC source 50 is provided. However, the other people cannot enter the building. For example, the security of the building in which thecommercial AC source 50 is provided is controlled. Only the registered users, and the administrator and serviceman of the air conditioning apparatus can enter the building. Thus, the operation for turning thecommercial AC source 50 on and off can be performed by the users, and the administrator and serviceman of the air conditioning apparatus. However, this operation cannot be performed by the other people. - The controller 42 includes a
first control section 42 a, asecond control section 42 b, athird control section 42 c, afourth control section 42 d and amemory 42 e as main functions related to the data setting and diagnosis for theoutdoor unit 1. - The
first control section 42 a permits data setting from theinformation terminal 100 via thecommunication unit 20 only for a certain period t1s after the outdoor unit 1 (the commercial AC source 50) is turned on. Specifically, thefirst control section 42 a receives data input from theinformation terminal 100 via thecommunication unit 20 only for a certain period t1s after theoutdoor unit 1 is turned on. - When the received data is data related to the operation of the
outdoor unit 1, thesecond control section 42 b performs a data setting process for setting the data as the operation data of theoutdoor unit 1. The process for setting the operation data is completed by the update and storage in thememory 42 e. - When the received data is an instruction for diagnosis for the
outdoor unit 1, thethird control section 42 c performs a diagnosis process for diagnosing the state of theoutdoor unit 1 and notifying theinformation terminal 100 of the diagnosis via thecommunication unit 20. - Near the end of the certain period t1s, the
fourth control section 42 d notifies theinformation terminal 100 of the fact via thecommunication unit 20. When thefourth control section 42 d receives an instruction to extend the period from theinformation terminal 100 in response to the notification via thecommunication unit 20, thefourth control section 42 d extends the certain period t1s. - Now, this specification explains the control performed by the controller 42 with reference to the flowchart of
FIG. 3 . - When the
outdoor unit 1 is installed or moved, or maintenance or inspection is performed for the trouble of the air conditioning apparatus, the administrator or serviceman of the air conditioning apparatus sets data related to the operation of theoutdoor unit 1 or diagnoses the state of theoutdoor unit 1. At this time, the administrator or serviceman of the air conditioning apparatus enters the building in which thecommercial AC source 50 is provided, and turns thecommercial AC source 50 on. The administrator or serviceman of the air conditioning apparatus is hereinafter referred to as a worker. - When the
commercial AC source 50 is turned on (power-on; YES in step S1), the controller 42 starts a time count t1 from zero (step S2), and compares the time count t1 with a predetermined certain period (default value) t1s (step S3). The certain period t1s includes a sufficient time for a worker to perform operation necessary for the above data setting process and the diagnosis process, and is set to, for example, approximately five to eight hours. - When the time count t1 is less than the certain period t1s (NO in step S3), the controller 42 permits a data setting process and a diagnosis process based on data communication between the
information terminal 100 and the communication unit 20 (step S4). - Based on this permission, the worker can perform operation necessary for a data setting process and operation necessary for a diagnosis process. The worker comes close to upper
front plate 4A of thehousing 2, and holds theinformation terminal 100 close to the second ventilation opening 4 a of upperfront plate 4A from the top. The worker operates theinformation terminal 100 close to theventilation opening 4 a and performs contactless data communication between theinformation terminal 100 and thecommunication unit 20. For theinformation terminal 100, for example, a tablet information terminal or a smartphone information terminal is used. - The controller 42 receives data input from the
information terminal 100 via thecommunication unit 20. When the received data is data related to the operation of theoutdoor unit 1, the controller 42 performs a data setting process for setting the received data as the operation data of theoutdoor unit 1. When the received data is an instruction for diagnosis for theoutdoor unit 1, the controller 42 performs a diagnosis process for diagnosing the state of theoutdoor unit 1 and notifying theinformation terminal 100 of the diagnosis via thecommunication unit 20. - The operation data set by the above data setting process includes, for example, various parameters related to the operation of the outdoor unit 1 (for example, outside air temperature, refrigerant temperature, the operating frequency of the compressor, and the address codes of a plurality of indoor units), and a control program (for example, firmware) for controlling the operation of the
outdoor unit 1. The state diagnosed by the above diagnosis process includes, for example, the operation history of theoutdoor unit 1, and the details of failure of theoutdoor unit 1. - The operation for a data setting process and the operation for a diagnosis process can be sufficiently completed within the certain period t1s if no problem occurs in the procedure of the operation, etc. Based on the permission of step S4, the controller 42 determines whether or not the time count t1 has reached a predetermined period “t1s−Δta” less than the certain period t1s by period Δta (step S5). Period Δta is set to notify the worker that the time count t1 is close to the certain period t1s. Period Δta is, for example, approximately five minutes. When the time count t1 is less than the predetermined period “t1s−Δta” (NO in step S5), the controller 42 returns to step S3 and continues to compare the time count t1 with the certain period t1s.
- When the time count t1 has reached the predetermined period “t1s-Δta” (YES in step S5), the controller 42 notifies the
information terminal 100 that the end of the process permissible period approaches via the communication unit 20 (step S6). - After the reception of the notification, the
information terminal 100 notifies the worker that the end of the process permissible period is close by displaying an image or producing beep sound. After the reception of the notification, the worker determines whether or not the current operation can be completed by the end of the process permissible period. - When the worker determines that the current operation cannot be completed by the end of the operation permissible period, the worker instructs the controller 42 to extend the period from the
information terminal 100 via thecommunication unit 20. When the controller 42 receives the instruction to extend the period (YES in step S7), the controller 42 adds period Δtb (>Δta) to the certain period t1s, and sets t1s+Δtb as a new certain period t1s (step S8). Period Δtb is, for example, one hour. The controller 42 returns to step S3 and continues to compare the time count t1 with the new certain period t1s. - When the worker determines that the current operation can be completed by the end of the operation permissible period, the worker continues the operation without issuing the above instruction to extend the period. In this case, the controller 42 does not receive an instruction to extend the period (NO in step S7). Thus, the controller 42 returns to step S3 and continues to compare the time count t1 with the certain period (default value) t1s without updating the certain period t1s.
- When the time count t1 has reached the certain period t1s (YES in step S3), the controller 42 prohibits a data setting process based on data communication between the
information terminal 100 and the communication unit 20 (step S9). A diagnosis process based on data communication between theinformation terminal 100 and thecommunication unit 20 may be continuously permitted, or may be prohibited in addition to a data setting process. - As described above, a data setting process is prohibited after the time count t1 has reached the certain period t1s. Thus, data cannot be set for the
outdoor unit 1 even if a third party performs data communication with thecommunication unit 20 from his/herinformation terminal 100. In this way, it is possible to enhance the security and reliability for unauthorized access from a third party. Even if a third party tries to make an unauthorized change to the preset data of theoutdoor unit 1, the change can be prevented. - In particular, the
outdoor unit 1 is provided outside, and anyone can come close to theoutdoor unit 1. Further, data communication using the NFC technology does not require a coupling process for establishing communication with theinformation terminal 100. Thus, it is important to enhance the security against unauthorized access from a third party as described above in terms of the safe operation and reliability of the air conditioning apparatus. - While the worker performs operation for a data setting process, the time count t1 may reach the certain period t1s, and the process may be prohibited. In this case, the worker should merely enter the building, turn the
commercial AC source 50 off (power-off), and turn it on again (power-on). - Based on the prohibition of step S9, the controller 42 monitors the shutdown (power-off) of the commercial AC source 50 (YES in step S10). When the
commercial AC source 50 is turned off (YES in step S10), the controller 42 stores, in thememory 42 d, the processing content of the controller 42 immediately before the shutdown of the commercial AC source 50 (step S11), and sets the certain period ts1 to the default value (step S12). The controller 42 returns to step S1 and monitors power-on. - When the
commercial AC source 50 is turned on again (power-on) (YES in step S1), the controller 42 repeats the process from step S2. In this case, the controller 42 continuously restarts the data setting process stopped by the above prohibition based on the processing content stored in thememory 42 d. In this manner, the worker can complete the operation for the data setting process. - When data communication is performed between the
information terminal 100 and thecommunication unit 20, the radio waves emitted from theinformation terminal 100 are not disturbed by magnetic upperfront plate 4A and effectively reach thecommunication unit 20 throughventilation openings 4 a. Similarly, the radio waves emitted from thecommunication unit 20 are not disturbed by magnetic upperfront plate 4A and effectively reach theinformation terminal 100 throughventilation openings 4 a. - The worker merely holds the
information terminal 100 close toventilation opening 4 a and operates theinformation terminal 100. There is no need to remove upperfront plate 4A and attach it again. Thus, no complicated work is required. In this way, the workload of the worker can be reduced, and the working time can be reduced. - Even when a large number of
outdoor units 1 are provided, and their side plates are tightly adjacent to each other, therespective communication units 20 are provided on the front sides of thehousings 2. Thus, data communication can be easily and steadily performed with thecommunication units 20 of all theoutdoor units 1. - In the above embodiment, the
communication unit 20 is provided at a position corresponding to the second ventilation opening 4 a of upperfront plate 4A from the top. However, the height position is not limited to this example, and can be appropriately determined. For example, in terms of security, thecommunication unit 20 may be provided at a position corresponding to alower ventilation opening 4 a as the internal side is difficult to see as a matter of course. - The above embodiment is explained, using the example in which the certain period t1s is set to approximately five to eight hours. However, the certain period t1s may be appropriately determined based on the type and the number of
outdoor units 1, and the experience or skill of the worker. - In the above embodiment, a data setting process is prohibited at the end of the certain period t1s after the power-on. However, when the operation state or history of the
outdoor unit 1 should not be seen by third parties, a process for reading data which should not be seen by third parties can be prohibited at the end of the certain period t1s after the power-on in addition to the prohibition of the data setting process. - The above embodiment is explained, using the example of an outdoor unit for an air conditioning apparatus as an outdoor unit for a refrigeration cycle apparatus. However, the embodiment is not limited to an outdoor unit for an air conditioning apparatus. The embodiment may be applied to, for example, an air-cooled chilling unit, a heat source unit for a heat-pump water heater, a heat source unit for a heat-pump warming apparatus, and a refrigerator connected to a refrigerated showcase.
- While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
-
- 1 Outdoor unit
- 2 Housing
- 3 Front plate
- 3 a Ventilation opening
- 4 Front plate
- 4 a Ventilation opening
- 5 Right side plate
- 5 a Ventilation opening
- 6 and 7 Top plates
- 8 and 9 Fan housings
- 10 Outdoor heat exchanger
- 11 and 12 Outdoor fans
- 20 Communication unit
- 42 Controller
- 42 a First control section
- 42 b Second control section
- 42 c Third control section
- 42 e Memory
- 50 Commercial AC source
- 100 Information terminal
Claims (6)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JPJP2014-234413 | 2014-11-19 | ||
JP2014234413 | 2014-11-19 | ||
PCT/JP2015/082135 WO2016080353A1 (en) | 2014-11-19 | 2015-11-16 | Outdoor unit |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/082135 Continuation WO2016080353A1 (en) | 2014-11-19 | 2015-11-16 | Outdoor unit |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170248336A1 true US20170248336A1 (en) | 2017-08-31 |
Family
ID=56013890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/594,161 Abandoned US20170248336A1 (en) | 2014-11-19 | 2017-05-12 | Outdoor unit |
Country Status (6)
Country | Link |
---|---|
US (1) | US20170248336A1 (en) |
EP (1) | EP3222927B1 (en) |
JP (2) | JPWO2016080353A1 (en) |
KR (1) | KR101933335B1 (en) |
CN (1) | CN107076450B (en) |
WO (1) | WO2016080353A1 (en) |
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US20180274799A1 (en) * | 2015-11-06 | 2018-09-27 | Mitsubishi Electric Corporation | Outdoor unit and air-conditioning apparatus using the same |
US10330337B2 (en) | 2014-11-18 | 2019-06-25 | Toshiba Carrier Corporation | Outdoor unit |
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JP2020148376A (en) * | 2019-03-13 | 2020-09-17 | 株式会社富士通ゼネラル | Outdoor unit |
JP7450345B2 (en) * | 2019-05-27 | 2024-03-15 | 三菱電機株式会社 | Data collection system, data collection method and program |
JP2020201003A (en) | 2019-06-12 | 2020-12-17 | ダイキン工業株式会社 | Outdoor unit for air conditioner and outdoor unit system including the same |
JP7466294B2 (en) * | 2019-11-14 | 2024-04-12 | 三菱電機株式会社 | COMMUNICATION SYSTEM AND COMMUNICATION METHOD |
WO2022064936A1 (en) * | 2020-09-23 | 2022-03-31 | 東芝キヤリア株式会社 | Outdoor unit for air conditioner |
CN115940998A (en) * | 2021-10-05 | 2023-04-07 | 开利公司 | Alternative near field communication system for HVAC equipment |
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Also Published As
Publication number | Publication date |
---|---|
EP3222927B1 (en) | 2020-03-18 |
CN107076450B (en) | 2020-04-21 |
JP2019011945A (en) | 2019-01-24 |
KR101933335B1 (en) | 2019-03-15 |
EP3222927A1 (en) | 2017-09-27 |
EP3222927A4 (en) | 2018-07-18 |
JPWO2016080353A1 (en) | 2017-07-06 |
JP6613349B2 (en) | 2019-11-27 |
WO2016080353A1 (en) | 2016-05-26 |
CN107076450A (en) | 2017-08-18 |
KR20170084292A (en) | 2017-07-19 |
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