US20210293436A1 - Outdoor unit of air conditioner - Google Patents

Outdoor unit of air conditioner Download PDF

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Publication number
US20210293436A1
US20210293436A1 US17/264,526 US201817264526A US2021293436A1 US 20210293436 A1 US20210293436 A1 US 20210293436A1 US 201817264526 A US201817264526 A US 201817264526A US 2021293436 A1 US2021293436 A1 US 2021293436A1
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United States
Prior art keywords
fan
outdoor
fan motor
outdoor unit
air conditioner
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Abandoned
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US17/264,526
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English (en)
Inventor
Yu OTORII
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Otorii, Yu
Publication of US20210293436A1 publication Critical patent/US20210293436A1/en
Abandoned legal-status Critical Current

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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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • 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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • F24F1/24—Cooling of electric components
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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

Definitions

  • the present invention relates to an outdoor unit of an air conditioner that sends outside air to an outdoor heat exchanger with a fan and performs heat exchange between a refrigerant and the outside air.
  • an air conditioner two outdoor fans that send outside air to an outdoor heat exchanger are installed on an outdoor unit such that the two outdoor fans are arranged one above the other.
  • the air conditioner performs cooling operation when the temperature of the outside air is low, the amount of heat exchange between the outside air and a refrigerant in the outdoor heat exchanger reaches or exceeds operating capacity required for an indoor unit, so that the inside of a room is excessively cooled.
  • a wire for supplying drive electric power to a fan motor that rotates each of the two outdoor fans may be connected to the wrong fan motor at the time of, for example, assembling in a factory or replacement of the fan motor during maintenance work.
  • the lower fan located away from the outside air temperature sensor and the electrical components will rotate. Therefore, the temperature of outside air cannot be accurately detected, and in addition, the electrical components cannot be cooled. Thus, there is a possibility that the electrical components are overheated and break down.
  • Patent Literature 1 proposes a method for rotating an intended fan motor by providing a mode for determining the connection states of two fan motors based on a value detected by an outside air temperature sensor, detecting an increase in the temperature of an outdoor heat exchanger based on an increase in the value detected by the outside air temperature sensor, and switching destinations of drive electric power supply in the case where it is determined that connections of the two fan motors have been reversed.
  • Patent Literature 1 Japanese Patent No. 5516466
  • Patent Literature 1 does not enable improper connection to be detected in the case of an outdoor unit of a multi air conditioning system for buildings, capable of being connected to a plurality of indoor units and separately operating or stopping each indoor unit.
  • the multi air conditioning system for buildings is also referred to as a variable refrigerant flow (VRF) system.
  • VRF variable refrigerant flow
  • an outdoor unit is generally selected which has a heat exchange capacity sufficient to allow all the connected indoor units to operate.
  • an outdoor heat exchanger will have a sufficient heat exchange capacity with respect to the operating capacity required for the indoor units. Therefore, the temperature of the outdoor heat exchanger hardly increases and the value detected by the outside air temperature sensor does not increase either, so that improper connection cannot be detected.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain an outdoor unit of an air conditioner capable of improving the probability of detecting improper connections of fan motors.
  • an outdoor unit of an air conditioner includes: a refrigerant circuit including a compressor, a flow path switch, an outdoor heat exchanger, a decompressor, and indoor heat exchangers connected via refrigerant pipes; two outdoor fans to supply air to the outdoor heat exchanger, the two outdoor fans being arranged one above the other; two fan motors to drive the respective two outdoor fans; a controller including two fan motor connectors and a fan motor power supply, the two fan motor connectors being capable of being connected to the fan motors, the fan motor power supply being capable of separately supplying power to each of the two fan motors connected to the fan motor connectors; and electrical component temperature sensors to measure temperatures of electrical components including at least components included in the controller, the electrical component temperature sensors being installed in an electrical component box in which the controller is enclosed.
  • the controller includes a control circuitry, wherein at a time of single-fan operation in which only upper one of the two outdoor fans is operated, the control circuitry is configured: to detect each of the two fan motors is connected to which of the two fan motor connectors; and to supply power in such a way to drive upper one of the outdoor fans based on a result of the detection, wherein the detection is performed based on comparison between temperatures of the electrical components at a start of the single-fan operation and temperatures of the electrical components after a set time has elapsed since the start of the single-fan operation.
  • An outdoor unit of an air conditioner according to the present invention has an effect of enabling the probability of detecting improper connections of fan motors to be improved.
  • FIG. 1 is a diagram illustrating a refrigerant circulation path of an air conditioner according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the inside of an outdoor unit of the air conditioner according to the first embodiment.
  • FIG. 3 is a block diagram of a control system of the outdoor unit of the air conditioner according to the first embodiment.
  • FIG. 4 is a flowchart illustrating an operation flow of single-fan operation of the outdoor unit of the air conditioner according to the first embodiment.
  • FIG. 5 is a block diagram of a control system of an outdoor unit of an air conditioner according to a second embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating an operation flow of single-fan operation of the outdoor unit of the air conditioner according to the second embodiment.
  • FIG. 7 is a diagram illustrating a configuration in which the function of a control circuitry of the outdoor unit of the air conditioner according to the first embodiment or the second embodiment is implemented by hardware.
  • FIG. 8 is a diagram illustrating a configuration in which the function of the control circuitry of the outdoor unit of the air conditioner according to the first embodiment or the second embodiment is implemented by software.
  • FIG. 1 is a diagram illustrating a refrigerant circulation path of an air conditioner according to a first embodiment of the present invention.
  • a plurality of indoor units 80 a and 80 b is connected to an outdoor unit 90 to form a VRF system.
  • the outdoor unit 90 includes a compressor 1 , a flow path switch 3 , an outdoor heat exchanger 4 , a first stationary valve 5 , and a second stationary valve 6 .
  • the compressor 1 , the flow path switch 3 , the outdoor heat exchanger 4 , the first stationary valve 5 , and the second stationary valve 6 are connected by refrigerant pipes to form a refrigerant circuit 30 .
  • the compressor 1 sucks a refrigerant, compresses the sucked refrigerant to put the refrigerant into a high-temperature and high-pressure state, and conveys the refrigerant to the refrigerant circuit 30 .
  • the flow path switch 3 is provided on the downstream side of the compressor 1 , and switches between the flow of the refrigerant for heating operation and the flow of the refrigerant for cooling operation.
  • the outdoor heat exchanger 4 performs heat exchange between air and the refrigerant.
  • the outdoor heat exchanger 4 acts as a condenser during the cooling operation and as an evaporator during the heating operation.
  • the outdoor unit 90 includes: various sensors, such as pressure sensors and temperature sensors; and a controller 16 including a substrate and a control circuitry 19 .
  • the controller 16 is electrically connected to the various sensors and the flow path switch 3 .
  • Examples of the sensors included in the outdoor unit 90 include an outside air temperature sensor 9 , an electrical component temperature sensor 17 , a high-pressure side pressure sensor 2 , and a low-pressure side pressure sensor 14 .
  • the outside air temperature sensor 9 detects the temperature of outside air.
  • the electrical component temperature sensor 17 detects the temperature of the substrate of the controller 16 .
  • the high-pressure side pressure sensor 2 is provided on the discharge side of the compressor 1 , and detects the high-pressure side pressure of the refrigerant.
  • the high-pressure side pressure of the refrigerant is also referred to as condenser pressure.
  • the low-pressure side pressure sensor 14 is provided on the intake side of the compressor 1 , and detects the low-pressure side pressure of the refrigerant.
  • the low-pressure side pressure of the refrigerant is also referred to as evaporator pressure.
  • the outdoor unit 90 includes outdoor fans 7 a and 7 b and fan motors 8 a and 8 b .
  • the outdoor fans 7 a and 7 b supply air to the outdoor heat exchanger 4 .
  • the fan motors 8 a and 8 b drive the outdoor fans 7 a and 7 b , respectively.
  • a propeller fan can be applied to the outdoor fans 7 a and 7 b .
  • FIG. 2 is a perspective view of the inside of the outdoor unit of the air conditioner according to the first embodiment. As illustrated in FIG. 2 , the fan motors 8 a and 8 b are fixed to a fan motor mounting part 50 .
  • FIG. 3 is a block diagram of a control system of the outdoor unit of the air conditioner according to the first embodiment. As illustrated in FIG.
  • the fan motors 8 a and 8 b are driven by the control circuitry 19 included in the controller 16 via a fan motor power supply 20 , fan motor connectors 15 a and 15 b , and fan motor wirings 18 a and 18 b .
  • the outdoor fans 7 a and 7 b blow air into the controller 16 to cool the substrate.
  • the controller 16 is enclosed in an electrical component box 40 .
  • the electrical component box 40 is attached to the upper part of a separator 51 .
  • Electrical components to be housed in the electrical component box 40 include at least components that constitute the controller 16 .
  • the components included in the controller 16 are exemplified by a terminal block for connection to a power source, and various sensors as well as a circuit board and electronic components.
  • slits (not illustrated) are provided in the separator 51 . The slits enable the controller 16 to be cooled with air blown by the outdoor fans 7 a and 7 b.
  • the indoor units 80 a and 80 b include decompressors 10 a and 10 b and indoor heat exchangers 11 a and 11 b , respectively.
  • the decompressors 10 a and 10 b decompress and expand the refrigerant.
  • the decompressors 10 a and 10 b are connected to the indoor heat exchangers 11 a and 11 b , respectively, by refrigerant pipes.
  • the indoor heat exchangers 11 a and 11 b perform heat exchange between air blown by a fan (not illustrated) and the refrigerant.
  • the indoor heat exchangers 11 a and 11 b act as evaporators during the cooling operation and as condensers during the heating operation.
  • An expansion valve can be applied to the decompressors 10 a and 10 b.
  • the indoor units 80 a and 80 b include various temperature sensors.
  • the various sensors of the indoor units 80 a and 80 b and the decompressors 10 a and 10 b are electrically connected to the controller 16 similarly to the various sensors of the outdoor unit 90 .
  • the temperature sensors of the indoor units 80 a and 80 b can be exemplified by evaporator temperature sensors that detect the evaporator temperatures of the indoor heat exchangers 11 a and 11 b .
  • the evaporator temperature sensors include indoor liquid pipe temperature sensors 12 a and 12 b provided on liquid pipes and indoor gas pipe temperature sensors 13 a and 13 b provided on gas pipes.
  • the air conditioner 100 includes a plurality of the indoor units 80 a and 80 b .
  • the indoor units 80 a and 80 b are connected in parallel between the first stationary valve 5 and the second stationary valve 6 by refrigerant pipes.
  • the indoor heat exchanger 11 a and the decompressor 10 a are connected in the indoor unit 80 a .
  • the indoor heat exchanger 11 b and the decompressor 10 b are connected in the indoor unit 80 b .
  • the indoor heat exchanger 11 a is provided with the indoor liquid pipe temperature sensor 12 a and the indoor gas pipe temperature sensor 13 a .
  • the indoor heat exchanger 11 b is provided with the indoor liquid pipe temperature sensor 12 b and the indoor gas pipe temperature sensor 13 b.
  • the compressor 1 , the flow path switch 3 , the outdoor heat exchanger 4 , the first stationary valve 5 , the decompressors 10 a and 10 b , the indoor heat exchangers 11 a and 11 b , and the second stationary valve 6 are connected in sequence by pipes to form the refrigerant circuit 30 that circulates the refrigerant.
  • the controller 16 controls operation of the refrigerant circuit 30 and the outdoor fans 7 a and 7 b . Specifically, based on values detected by the various sensors, the controller 16 controls: the capacity of the compressor 1 ; the opening degrees of the decompressors 10 a and 10 b ; and the driving of the outdoor fans 7 a and 7 b.
  • the outside air temperature sensor 9 is attached above the outdoor heat exchanger 4 . Therefore, the outside air temperature sensor 9 is easily affected by the state of outside air in the vicinity of the outdoor heat exchanger 4 .
  • the outdoor heat exchanger 4 has a sufficient heat exchange capacity with respect to the operating capacity required for the indoor unit 80 a or the indoor unit 80 b . Therefore, the temperature of the outdoor heat exchanger 4 hardly rises, and a value detected by the outside air temperature sensor 9 does not rise either. Furthermore, when it is windy outside, the flow of outside air to the outdoor heat exchanger 4 is caused without the use of the rotation of the outdoor fans 7 a and 7 b .
  • the outdoor air does not stay, and the value detected by the outside air temperature sensor 9 does not rise. Furthermore, since the outdoor heat exchanger 4 acts as an evaporator during the heating operation, the temperature of the refrigerant decreases and the value detected by the outside air temperature sensor 9 also decreases.
  • the following can be said about the electrical component temperature sensor 17 among the various sensors included in the outdoor unit 90 .
  • a value detected by the electrical component temperature sensor 17 rises even when only one of the indoor units 80 a and 80 b is operated. This is because heat generation in the electrical components is always caused by current flowing through the electrical components and the resistance values of the electrical components. Furthermore, even when it is windy outside, a rise in electrical component temperature can be detected without being affected by the outside wind. This is because the electrical component temperature sensor 17 is installed in the electrical component box 40 .
  • the electrical component temperature sensor 17 is installed in the electrical component box 40 , and is shielded from the outdoor fans 7 a and 7 b except for the slit portion provided in the separator 51 .
  • the result of measurement measured by the electrical component temperature sensor 17 is less likely to be affected by airflow generated by the outdoor fans 7 a and 7 b than the result of measurement measured by the outside air temperature sensor 9 . Furthermore, heat generation in the electrical components is always caused by the current flowing through the electrical components and the resistance values of the electrical components even during the heating operation, so that a rise in electrical component temperature can be detected.
  • FIG. 4 is a flowchart illustrating an operation flow of single-fan operation of the outdoor unit of the air conditioner according to the first embodiment.
  • the control circuitry 19 determines whether a single-fan operation start condition is satisfied. If the single-fan operation start condition is satisfied, a determination of “Yes” is made in step S 101 , and the process proceeds to step S 102 . If the single-fan operation start condition is not satisfied, a determination of “No” is made in step S 101 , and step S 101 is repeated.
  • step S 102 the control circuitry 19 outputs, to the fan motor power supply 20 , a command to supply power only to the fan motor 8 a , which is the upper fan motor, and stop supply of power to the fan motor 8 b , which is the lower fan motor. Furthermore, the control circuitry 19 stores the temperatures of the electrical components measured by the electrical component temperature sensor 17 . In this way, the control circuitry 19 performs the single-fan operation.
  • step S 103 the control circuitry 19 determines whether a set time has elapsed since the single-fan operation was started. If the set time has elapsed since the single-fan operation was started, a determination of “Yes” is made in step S 103 , and the process proceeds to step S 104 . If the set time has not elapsed, a determination of “No” is made in step S 103 , and step S 103 is repeated.
  • step S 104 the control circuitry 19 determines whether differences between the current values of the temperatures of the electrical components measured by the electrical component temperature sensor 17 and the temperatures of the electrical components at the start of the single-fan operation are less than a threshold value. If the differences between the temperatures of the electrical components at the start of the single-fan operation and the current temperatures of the electrical components are less than the threshold value, a determination of “Yes” is made in step S 104 , and the process proceeds to step S 105 . If the differences between the temperatures of the electrical components at the start of the single-fan operation and the current temperatures of the electrical components are equal to or greater than the threshold value, a determination of “No” is made in step S 104 , and the process proceeds to step S 106 .
  • step S 105 the control circuitry 19 determines that connections of the outdoor fans 7 a and 7 b are normal, and the process proceeds to step S 108 .
  • step S 106 the control circuitry 19 determines that the connections of the outdoor fans 7 a and 7 b have been reversed, and the process proceeds to step S 107 .
  • step S 107 the control circuitry 19 stops supply of power to the fan motor connector 15 a , and starts supply of power to the fan motor connector 15 b . That is, the control circuitry 19 switches power supply for the fan motor connectors 15 a and 15 b . Therefore, supply of power to the fan motor 8 b connected to the fan motor connector 15 a in a manner opposite to a normal state is stopped, and supply of power to the fan motor 8 a connected to the fan motor connector 15 b is started.
  • step S 107 is completed, the process proceeds to step S 108 .
  • step S 108 the controlcircuitry 19 determines whether a single-fan operation end condition is satisfied. If the single-fan operation end condition is satisfied, a determination of “Yes” is made in step S 108 , and the process ends. If the single-fan operation end condition is not satisfied, a determination of “No” is made in step S 108 , and step S 108 is repeated.
  • the outdoor unit 90 of the air conditioner 100 detects improper connections of the fan motors 8 a and 8 b based on the values detected by the electrical component temperature sensor 17 . Therefore, improper connections of the fan motors 8 a and 8 b can be detected even when the cooling operation is performed by only a small number of the indoor units, that is, the cooling operation is performed by only one of the indoor units 80 a and 80 b.
  • the electrical component temperature sensor 17 is installed in the electrical component box 40 .
  • improper connections of the fan motors 8 a and 8 b can be detected even under the condition that the value detected by the outside air temperature sensor 9 does not rise since it is windy outside and air is not stagnant around the outside air temperature sensor 9 .
  • the amount of heat exchange between the outside air and the refrigerant in the outdoor heat exchanger may also reach or exceed the operating capacity required for the indoor units during the heating operation in an environment with high outside air temperature as well as the above-described cooling operation in an environment with low outside air temperature.
  • the temperature of the outside air measured by the outside air temperature sensor 9 decreases. This is because the outdoor heat exchanger 4 acts as an evaporator during the heating operation.
  • the outdoor unit 90 of the air conditioner 100 detects improper connections of the fan motors 8 a and 8 b based on the values detected by the electrical component temperature sensor 17 .
  • the improper connections of the fan motors 8 a and 8 b can be detected even in the case where the heating operation is performed in the environment with high outside air temperature.
  • FIG. 5 is a block diagram of a control system of an outdoor unit of an air conditioner according to a second embodiment of the present invention.
  • the outdoor unit 90 of the air conditioner 100 according to the second embodiment is different from the outdoor unit 90 of the air conditioner 100 according to the first embodiment in that the controller 16 includes a connection state memory 21 .
  • the connection state memory 21 stores connection state information indicating which of the fan motor connectors 15 a and 15 b each of the fan motors 8 a and 8 b is connected to.
  • FIG. 6 is a flowchart illustrating an operation flow of single-fan operation of the outdoor unit of the air conditioner according to the second embodiment. This operation flow differs from the operation flow of the single-fan operation of the outdoor unit 90 according to the first embodiment in that the processes of steps S 109 and S 110 have been added between steps S 101 and S 102 .
  • step S 109 determines whether the connection state information is stored in the connection state memory 21 . If the connection state information is stored in the connection state memory 21 , a determination of “Yes” is made in step S 109 , and the process proceeds to step S 110 . In step S 110 , the connection state information is read out from the connection state memory 21 , and the process proceeds to step S 102 . If the connection state information is not stored, a determination of “No” is made in step S 109 , and the process proceeds to step S 102 .
  • step S 102 the control circuitry 19 outputs, to the fan motor power supply 20 , a command to supply power only to the fan motor 8 a , which is the upper fan motor, and to stop supply of power to the fan motor 8 b , which is the lower fan motor.
  • the control circuitry 19 outputs, to the fan motor power supply 20 , a command to supply power only to the fan motor 8 a , which is the upper fan motor, and to stop supply of power to the fan motor 8 b , which is the lower fan motor.
  • the connection state information has been read in step S 110 , power is supplied to one of the fan motor connectors 15 a and 15 b , connected to the fan motor 8 a so that power is supplied to the fan motor 8 a.
  • connection state information is stored in the connection state memory 21 in step S 105 or step S 106 .
  • the outdoor unit 90 of the air conditioner 100 can start the single-fan operation so that only the outdoor fan 7 a is driven in the case where the connection state information is stored in the connection state memory 21 . Therefore, the cooling of the controller 16 can be started immediately after the start of the single-fan operation, and it is thus possible to reduce the possibility that the electrical components may break down due to an increase in temperature.
  • the function of the control circuitry 19 of the outdoor unit 90 of the air conditioner 100 according to the first embodiment or second embodiment described above is implemented by processing circuitry.
  • the processing circuitry may be dedicated hardware, or may be a processing device that executes a program stored in a storage device.
  • FIG. 7 is a diagram illustrating a configuration in which the function of the control circuitry of the outdoor unit of the air conditioner according to the first embodiment or the second embodiment is implemented by hardware.
  • a logic circuit 29 a that implements the function of the control circuitry 19 is incorporated in processing circuitry 29 .
  • the function of the control circuitry 19 is implemented by software, firmware, or a combination of software and firmware.
  • FIG. 8 is a diagram illustrating a configuration in which the function of the control circuitry of the outdoor unit of the air conditioner according to the first embodiment or the second embodiment is implemented by software.
  • the processing circuitry 29 includes a processor 291 , a random access memory 292 , and a storage device 293 .
  • the processor 291 executes a program 29 b .
  • the random access memory 292 is used as a work area by the processor 291 .
  • the program 29 b is stored in the storage device 293 .
  • the processor 291 deploys the program 29 b stored in the storage device 293 on the random access memory 292 , and executes the program 29 b . As a result, the function of the control circuitry 19 is implemented.
  • the software or firmware is described in a programming language, and stored in the storage device 293 .
  • the processor 291 can be exemplified by, but is not limited to, a central processing unit. It is possible to apply, to the storage device 293 , a semiconductor memory such as a random access memory (RAM), a read only memory (ROM), a flash memory, an erasable programmable read only memory (EPROM), or an electrically erasable programmable read only memory (EEPROM) (registered trademark).
  • RAM random access memory
  • ROM read only memory
  • EPROM erasable programmable read only memory
  • EEPROM electrically erasable programmable read only memory
  • the semiconductor memory may be a non-volatile memory or a volatile memory.
  • a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a Digital Versatile Disc (DVD) can be applied to the storage device 293 .
  • the processor 291 may output data such as a calculation result to the storage device 293 to store the data in the storage device 293 , or may store the data in an auxiliary storage device (not illustrated) via the random access memory 292 .
  • the processing circuitry 29 implements the function of the control circuitry 19 by reading out and executing the program 29 b stored in the storage device 293 . It can also be said that the program 29 b causes a computer to execute a procedure and method for implementing the function of the control circuitry 19 .
  • processing circuitry 29 may be partially implemented by dedicated hardware and partially implemented by software or firmware.
  • processing circuitry 29 can implement each of the above-described functions by means of hardware, software, firmware, or a combination thereof.

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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)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
US17/264,526 2018-09-04 2018-09-04 Outdoor unit of air conditioner Abandoned US20210293436A1 (en)

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JP (1) JPWO2020049633A1 (ja)
CN (1) CN112567180A (ja)
AU (1) AU2018440632B2 (ja)
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JP2012193900A (ja) * 2011-03-16 2012-10-11 Fujitsu General Ltd 空気調和機の室外機
US20170292733A1 (en) * 2014-09-26 2017-10-12 Mitsubishi Electric Corporation Indoor equipment and air conditioner
WO2017077649A1 (ja) * 2015-11-06 2017-05-11 三菱電機株式会社 空気調和装置の室外機

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CN112567180A (zh) 2021-03-26
AU2018440632B2 (en) 2022-06-30
JPWO2020049633A1 (ja) 2021-02-15
WO2020049633A1 (ja) 2020-03-12
AU2018440632A1 (en) 2021-03-04

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