Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
• • 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
  • F24F11/30—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
  • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers

Definitions

• the present invention relates to an air conditioner that restarts operation when the power is restored after the operation is stopped due to a power failure during operation.
• An object of the present invention is to provide a power supply system in which, when a plurality of air conditioners are shut down due to a power outage during operation and the power is restored, the air conditioners are not restarted simultaneously after the power is restored.
• An object of the present invention is to provide an air conditioner capable of preventing an excessive current from flowing in a line and preventing a power supply protection breaker from operating.
• an air conditioner of the present invention is an air conditioner that resumes operation when the power is restored after being shut down due to a power outage during operation.
• a delay time calculating section for calculating the calculated delay time
• a delay timer for measuring the delay time calculated by the delay time calculating section from the return of the power supply
• An operation control unit for restarting the operation.
• all of the air conditioners are operated due to a power failure while the air conditioners are operating.
• the delay time calculation unit of each air conditioner calculates a different delay time, and sets the calculated delay time in the delay timer. Then, each of the air conditioners restarts operation at a different time after the delay time is measured by the delay timer after the power is restored. Therefore, all the air conditioners do not resume operation at the same time after the power supply is restored, so that an excessive current does not flow through the power supply line and the power supply protection breaker can be prevented from being shut off.
• the air conditioner includes a storage unit that stores a set value representing operation information
• the delay time calculation unit is configured to store the set value representing the operation information stored in the storage unit based on the set value. Then, the delay time from the return of the power supply to the restart of the operation is calculated.
• set values indicating operation information such as an operation mode, an air volume tap, and a set temperature are stored in the storage unit, and the operation information is retained even if the power is cut off.
• the set values represented by the operation information are different from each other, and it is less likely that the set values are the same. Therefore, the delay time from the return of the power supply to the restart of the operation is calculated by the delay time calculation unit based on the set values representing the operation information, whereby the delay time of a different value for each air conditioner is calculated.
• the delay time of a different value can be easily set in the delay timer without having to set the delay time.
• an air conditioner includes a temperature sensor that detects a temperature indicating an operation state, and the delay time calculation unit is configured to perform the operation based on the temperature indicating the operation state detected by the temperature sensor. The delay time from when the power is restored to when the operation is restarted is calculated.
• the temperature sensor detects a temperature indicating an operating state such as an indoor temperature, an outdoor air temperature, an indoor heat exchanger temperature, and an outdoor heat exchanger temperature.
• a temperature indicating an operating state such as an indoor temperature, an outdoor air temperature, an indoor heat exchanger temperature, and an outdoor heat exchanger temperature.
• the temperatures representing the operating states of the plurality of air conditioners are different from each other, and are less likely to be in the same state. Therefore, the delay time from the return of the power supply to the restart of the operation is calculated by the delay time calculation unit based on the temperature representing the operation state, so that the delay time of a different value is set for each air conditioner. Setting It is possible to easily set different delay times to the delay timer without having to specify it.
• FIG. 1 is a prog diagram of an air conditioner according to an embodiment of the present invention.
• FIG. 2 is a flowchart of the control device of the air conditioner.
• FIG. 3 is a flowchart following FIG.
• FIG. 4 is a timing chart when the air conditioner is restarted.
• FIG. 5 is a timing chart at the time of restarting the conventional air conditioner.
• FIG. 1 is a block diagram of an air conditioner according to an embodiment of the present invention, where 10 is an indoor unit and 20 is an outdoor unit.
• the indoor unit 10 includes the indoor heat exchanger 1
• the outdoor unit 20 includes a compressor 2 having a suction side connected to one end of the indoor heat exchanger 1 of the indoor unit 10, and the compressor 2.
• An outdoor heat exchanger 3 having one end connected to the discharge side of the outdoor heat exchanger 3, one end connected to the other end of the outdoor heat exchanger 3, and the other end connected to the other end of the indoor heat exchanger 1 of the indoor unit 10
• Expansion means 4 connected thereto.
• the indoor heat exchanger 1, the compressor 2, the outdoor heat exchanger 3 and the expansion means 4 constitute a refrigerant circuit.
• the refrigerant discharged from the compressor 2 radiates heat to the outside in the outdoor heat exchanger 3 to be condensed, expands by the expansion means 4, and then evaporates in the indoor heat exchanger 1 to remove the indoor heat. Absorb and cool the room.
• the indoor unit 10 includes a relay 5 for turning on and off the drive voltage of the compressor 2, a control device 6 for controlling the relay 5 and the like, and a rotational drive by a drive signal from the control device 6. And a room temperature sensor D2 for detecting a room temperature near the fan motor 8 and a room temperature sensor D2 for detecting the temperature of the room heat exchanger 1. ing.
• the control device 6 includes a microcomputer (hereinafter, referred to as a microcomputer), an input / output circuit, and the like, and includes a receiving unit 6 a for receiving an operation signal from a remote controller (hereinafter, referred to as a remote controller) 7, and An EEPROM (electrically erasable and writable read-only memory) 6b is provided as a storage unit for storing set values representing set operation information. Further, the control device 6 includes: The delay time calculator 6 for calculating the delay time T based on the set value indicating the operation information stored in the EEPROM 6b and the delay time T calculated by the delay time calculator 6c are timed. A delay timer 6d that performs the operation and an operation control unit 6e that restarts the operation when the time measurement of the delay timer 6d ends.
• a microcomputer hereinafter, referred to as a microcomputer
• a remote controller hereinafter, referred to as a remote controller
• FIG. 2 is a main port diagram showing the process after the power failure recovery of the control device 6, and FIG. 3 is a subroutine of the process for calculating the compressor start delay time T in step S3 in FIG. It is a flow chart of Chin.
• control device 6 will be described with reference to FIGS.
• step S1 after the power is restored, when the process starts, it is determined in step S1 whether the microcomputer of the control device 6 has been reset, and if it is determined that the microcomputer has been reset, the process proceeds to step S2. On the other hand, if it is determined that the microcomputer has not been reset, this processing ends. In other words, if the state before the power failure was the operation state, the microcomputer was reset, and the process proceeded to restart the operation after step S2, while the state before the power failure was the stop state In this case, the microcomputer is not reset and the process ends. Then, when the process proceeds to step S2, the data is read from EPROM 6b. That is, the set value (air flow set value) representing the operation information in the state before the stoppage due to the power failure is read.
• step S3 the process proceeds to step S3 to perform a process of calculating a start delay time T of the compressor 2.
• the subroutine for calculating the start delay time T of the compressor 2 will be described in more detail with reference to FIG.
• the delay time T is set to a value corresponding to 3 minutes in advance.
• step S31 shown in FIG. 3 the room temperature is obtained by the room temperature sensor D1, and the room temperature is added to the delay time T.
• step S32 the temperature of the indoor heat exchanger 1 is obtained by the indoor heat exchanger temperature sensor D2, and the temperature of the indoor heat exchanger 1 is added to the delay time T.
• step S33 the air volume setting value is added to the delay time T.
• step S34 the count value of a one second timer (not shown) is added to the delay time T.
• step S35 the count value of the power supply synchronization timer (not shown) is added to the delay time T.
• the 1-second timer and the power-synchronization timer start counting after the microcomputer starts after power is restored, and the timing at which the microcomputer starts in each air conditioner varies. Count values vary.
• step S36 the delay time T is set in the delay timer 6d, and the process returns to the main routine of FIG.
• the load of the compressor 2 is reduced by adding 3 minutes to the delay time T, waiting for 3 minutes without fail, and equalizing the pressure in the refrigerant circuit. Then, it is easy to restart the compressor 2.
• step S4 the delay time T calculated in step S3 is set in the delay timer 6d, and time measurement is started, and the compressor 2 is started until the time measurement of the delay timer 6d ends. Delay.
• step S5 the operation control unit 6e starts the compressor 2 to restart the operation, and ends this processing.
• the possible values for each parameter are
• Power supply synchronization timer count value 0 to 99 (when power supply frequency is 50 Hz)
• the indoor temperature and the indoor heat exchanger temperature are set to 18 ° C and the microcomputer performs an 8-bit operation, first, the indoor temperature 12 h (l hexadecimal) and the indoor heat exchanger temperature 12 h ( l Hexadecimal), add 4 Oh (l Hexadecimal) Find the set value TN.
• adding 4 Oh when obtaining the above timer setting value TN is a process necessary for operating the delay timer 6d. Then, after adding the count value of the 1 second timer and the count value of the power supply synchronization timer, the upper 2 bits are set to 0. Next, when the timer set value TN is zero, the timer set value TN is set to 3 h. When the timer set value TN is divided by 3 and the remainder is 1, 2 is added to the timer set value TN. If the setting value TN is divided by 3 and the remainder is 2, the timer setting value TN is made a multiple of 3 by adding 1 to the timer setting value TN. Then, after adding 4 Oh to the above timer setting value TN, the delay timer 6d is set.
• the timer set value TN set in the delay timer 6 d is a multiple of 3, and by setting the minimum count value of the delay timer 6 d to 100 Omsec, the delay time T is set to 300 ms. Will be set to This 300 msec is the minimum time difference in which the peak current when the compressor starts when the air conditioner restarts operation in this case does not overlap. Therefore, the delay time T that varies every 30 Omsec is set in the delay timer.
• each air conditioner A, B, C air conditioners A, B, C in Fig. 4
• the air conditioners A, B, and C are set with different delay times TA, TB, and TC for each device by the control device 6, and each air conditioner A , B, and C resume operation at different times after the delay time TA, TB, and TC have elapsed since the power was restored.
• the set value (air flow set value) representing the operation information is stored in the EEPROM 6b, and the operation information is retained even if the power is cut off, and the operation is performed by the indoor temperature sensor D1 and the indoor heat exchanger temperature sensor D2.
• the indoor temperature indicating the state and the temperature of the indoor heat exchanger 1 are respectively detected.
• the set value indicating these operation information and the power supply The operation is restarted from the return of the power by the delay time calculator 6c based on the indoor temperature indicating the operating state detected after the return, the temperature of the indoor heat exchanger 1, and the count values of the 1-second timer and the power supply synchronization timer.
• the delay time T set in the delay time timer 6d is not limited to the above-described parameters, and may be calculated based on the following setting items and various temperatures representing the operating state.
• the delay time T is calculated by the delay time calculating unit 6c based on the set value indicating the operation information and the temperature indicating the operation state, but the set value indicating the operation information or the operation state is indicated.
• the delay time may be calculated by the delay time calculation unit based on one of the temperatures. Further, a different delay time T may be set in advance for each air conditioner, may be set after installation, or the delay time may be calculated by generating a random number.
• the waiting time for equalizing the refrigerant circuit of 3 minutes is set in advance to the delay time T and various parameters are added.
• a 3-minute waiting timer is separately provided to restore the power supply. After that, the delay timer may be clocked after the 3 minute standby timer ends.
• the air conditioner that performs only the cooling operation has been described.
• the present invention may be applied to an air conditioner that performs the cooling operation and the heating operation.
• the present invention may be applied to an air conditioner in which the indoor unit 10 and the indoor unit 20 are separate from each other, and the power indoor unit and the outdoor unit are described in the form of a separate air conditioner.
• the present invention is applicable to an air conditioner operated by a plurality of power supplies, and is useful for preventing an excessive current from flowing to a power supply line and preventing an operation of a power supply protection breaker.

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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)

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Citations (5)

• 1997
  • 1997-11-28 JP JP32782697A patent/JP3191750B2/ja not_active Expired - Fee Related
• 1998
  • 1998-11-24 CN CNB988133822A patent/CN1140727C/zh not_active Expired - Fee Related
  • 1998-11-24 WO PCT/JP1998/005262 patent/WO1999028683A1/ja active IP Right Grant
  • 1998-11-24 AU AU11759/99A patent/AU749773B2/en not_active Ceased
• 2001
  • 2001-07-26 HK HK01105225A patent/HK1034764A1/xx not_active IP Right Cessation

Patent Citations (5)

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