WO2015190886A1 - Climatiseur et son procédé de commande - Google Patents

Climatiseur et son procédé de commande Download PDF

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Publication number
WO2015190886A1
WO2015190886A1 PCT/KR2015/005966 KR2015005966W WO2015190886A1 WO 2015190886 A1 WO2015190886 A1 WO 2015190886A1 KR 2015005966 W KR2015005966 W KR 2015005966W WO 2015190886 A1 WO2015190886 A1 WO 2015190886A1
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Prior art keywords
voltage
generator
compressor
power
unit
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Ceased
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PCT/KR2015/005966
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English (en)
Korean (ko)
Inventor
황종철
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LG Electronics Inc
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LG Electronics Inc
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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

Definitions

  • the present invention relates to an air conditioner and a control method thereof, and more particularly, to an air conditioner for controlling an operation by detecting an overload of a supplied power source and a control method thereof.
  • the air conditioner is installed to provide a comfortable indoor environment for humans by discharging cold air to the room to adjust the room temperature and purify the room air to create a pleasant indoor environment.
  • the air conditioner includes an indoor unit which is constituted by a heat exchanger and installed in a room, and an outdoor unit which is constituted by a compressor, a heat exchanger and the like and supplies the refrigerant to the indoor unit.
  • Such an air conditioner is controlled by being separated and controlled by an indoor unit constituted by a heat exchanger, an outdoor unit constituted by a compressor, a heat exchanger and the like, and operated by controlling a power source supplied to a compressor or a heat exchanger. Also, at least one indoor unit may be connected to the outdoor unit, and the air conditioner is operated in the cooling or heating mode by supplying the refrigerant to the indoor unit according to the requested operation state.
  • the refrigerant of high temperature and high pressure When the liquid refrigerant of high temperature and high pressure is supplied from the compressor of the outdoor unit to the indoor unit through the heat exchanger of the outdoor unit during the cooling operation, the refrigerant expands and vaporizes in the heat exchanger of the indoor unit, When the temperature of the air is lowered and the indoor fan is rotated, the cool air is discharged into the room.
  • the gas refrigerant of high temperature and high pressure is supplied from the compressor of the outdoor unit to the indoor unit during the heating operation, the gas refrigerant of high temperature and high pressure is liquefied in the heat exchanger of the indoor unit The air warmed by the released energy is discharged to the room according to the operation of the indoor fan.
  • the air conditioner In an environment where the commercial power is not stably supplied, the air conditioner is continuously operated even if the voltage of the supplied power source is low, or when a power source having a large voltage fluctuation is supplied due to irregular waveform of the power source such as a generator, There is a difficult problem.
  • Generally used generators are low capacity generators, and the supplied power supply is also unstable operating power with severe voltage fluctuation.
  • This phenomenon may cause the user to feel uneasy, cause the generator to fail, and possibly damage the air conditioner.
  • An object of the present invention is to provide an air conditioner and a control method thereof for controlling an operation of an overloaded power supply in an environment where unstable power is supplied.
  • the air conditioner according to the present invention includes a power unit connected to a generator to supply a DC power by rectifying and smoothing the power supplied to the generator, a voltage sensing unit for measuring a voltage of the DC power supply, A driving unit for controlling driving of the compressor, and a generator mode setting unit for recognizing an operation mode of the generator power source, and for setting the generator mode so that the voltage is maintained above a set value for cooling operation or heating operation, And a controller for controlling the load on the generator power by increasing or decreasing the operating frequency of the compressor according to the voltage measured by the voltage sensing unit.
  • a control method for an air conditioner comprising: setting a generator mode by recognizing an operation mode of an input generator power; determining whether the generator is overloaded by measuring a voltage of the generator power; Limiting the operation of the compressor so that the voltage is maintained above a set value for cooling operation or heating operation when the generator is in an overload state; and re-measuring the voltage, if the voltage is above the set value, .
  • the air conditioner and its control method according to the present invention configured as described above detects whether an overload of the supplied power is overloaded and controls the operation so as to prevent overload of the supplied power source and prevent frequent on / off of the air conditioner So that it is possible to operate continuously and prevent damage to the power supply and the product, thereby providing convenience to the user and providing a more pleasant environment.
  • FIG. 1 is a view showing a configuration of an air conditioner according to the present invention.
  • FIG. 2 is a view showing an air conditioner and a power supply according to the present invention.
  • FIG. 3 is a block diagram showing the control arrangement of the air conditioner unit according to the present invention.
  • FIG. 4 is a block diagram showing a configuration according to the operation control of the air conditioner of the present invention.
  • FIG. 5 is a diagram for describing an operation frequency control for power consumption control of the air conditioner according to the present invention.
  • FIG. 6 is a diagram illustrating a change in power consumption according to the mode setting of the air conditioner according to the present invention.
  • FIG. 7 is a graph illustrating power consumption and operating frequency according to the mode setting of the air conditioner according to the present invention.
  • FIG. 8 is a view showing a change in the smoothed DC power of the air conditioner according to the present invention.
  • FIG. 9 is a flowchart showing a control method of the air conditioner according to the present invention.
  • FIG. 10 is a graph showing changes in the operating frequency and voltage of the air conditioner according to the present invention.
  • the air conditioner includes an indoor unit 1 and an outdoor unit 2. It also includes a remote control 3 for inputting a control command to the indoor unit 1.
  • other home appliances other than the air conditioner are provided.
  • a washing machine a lamp, a refrigerator, and a television.
  • a household electric appliance such as a fan.
  • the household appliances and the air conditioner operate by receiving either the power generated from the power generation units 21, 22, or 23, that is, the power from the commercial power source 20 and the power generated from the generator 10.
  • a switch for example, 30 may be further provided.
  • the switch 30 may select one of the commercial power supply and the generator power to be supplied to the household appliance as well as select the load.
  • the type of household appliance or the number of household appliances that can be connected to the generator varies depending on the capacity of the generator.
  • generators for household use are small capacity, about 600 to 1 kWh.
  • the generator may be overloaded when the air conditioner is connected or a plurality of household appliances are connected and operated at the same time.
  • the air conditioner when the air conditioner is connected to the generator 10, the air conditioner reduces the power consumption of the generator by reducing the power consumption corresponding to the voltage of the power supplied from the generator. At this time, the air conditioner sets the operation mode to the generator mode, and controls the operation of the air conditioner according to the power consumption to be calculated.
  • the generator mode can be automatically set by recognizing the generator power from the input power source, or can be set corresponding to the data input through the remote control 3 or the input means.
  • the air conditioner operates in the generator mode to control the operation according to the power consumption, and controls the operation by determining whether the generator is overloaded in accordance with the voltage of the power source input from the generator. That is, the air conditioner controls the operation in accordance with whether or not the generator is overloaded within the range of the set power consumption.
  • FIG. 2 is a view showing an air conditioner and a power supply according to the present invention.
  • the air conditioner includes an indoor unit 1 for discharging air into the room and an outdoor unit 2 for supplying the refrigerant, and includes a remote controller 3 for transmitting a control command to the indoor unit 1 do.
  • the indoor unit and the outdoor unit are connected by the refrigerant piping but also by the communication line and the power line.
  • the air conditioner can be connected to the commercial power supply 20 (A) or connected to the generator 10 (B).
  • the switch 30 When the switch 30 is provided, it can be connected to either the commercial power supply 20 or the power supply of the generator 10 through a switch operation, and the connected power supply can be switched.
  • the air conditioner When the indoor unit or the outdoor unit is connected to the power source, the air conditioner is supplied power to the other unit through the connected power source line.
  • the air conditioner is explained as an example in which one indoor unit 1 is connected to the outdoor unit 2 and the indoor unit is a wall-mounted type or frame type.
  • the indoor units can be connected to the outdoor unit in plural, Stand type, wall type, and the like.
  • the outdoor unit and the indoor unit may be combined to form a single body.
  • the figure shows that the air conditioner is not limited to the form of the air conditioner.
  • the indoor unit 1 includes an expansion valve (not shown) for expanding the refrigerant supplied from the outdoor unit 2, an indoor heat exchanger (not shown), indoor air introduced into the indoor heat exchanger, (Not shown), a plurality of sensors (not shown), and control means (not shown) for controlling the operation of the indoor unit.
  • the indoor unit 1 includes a discharge port (not shown) for discharging the heat-exchanged air, and the discharge port is provided with a wind direction adjusting unit (not shown) for opening and closing the discharge port and controlling the direction of the discharged air.
  • the indoor unit 1 controls the intake air and the discharged air by controlling the rotation speed of the indoor fan, and adjusts the air flow rate.
  • the indoor unit 1 may further include human body sensing means for sensing a human body present in the indoor space.
  • the outdoor unit (2) operates in a cooling mode or a heating mode according to the demand of the connected indoor unit (1) to supply the refrigerant to the indoor unit.
  • the outdoor unit 2 includes at least one compressor (not shown) for compressing the refrigerant introduced therein and discharging the gas refrigerant at a high pressure, a gas cooler for separating the gas refrigerant and the liquid refrigerant from the refrigerant, An oil separator (not shown) for recovering oil from the refrigerant discharged from the compressor, an outdoor heat exchanger (not shown) for condensing or evaporating the refrigerant by heat exchange with the outside air, an outdoor heat exchanger An outdoor fan (not shown) for introducing air into the outdoor heat exchanger and discharging the heat-exchanged air to the outside, a four-way valve (not shown) for changing the flow path of the refrigerant according to the operation mode of the outdoor unit, At least one pressure sensor (not shown), and at least one temperature sensor (not shown) for measuring the temperature.
  • the outdoor unit further includes a plurality of sensors, valves, supercooling units and the like, and a description thereof will be omitted below.
  • the remote controller 3 includes input means such as at least one button, a switch, and a touch pad, and transmits data on the operation settings of the air conditioner to the indoor unit 1. [ At this time, the remote controller 3 transmits data through a wireless communication system. And may be wired through a communication line in some cases.
  • the remote controller 3 transmits the input data to the indoor unit, and displays the operation information set in the indoor unit. Further, the remote controller 3 can measure and display the room temperature.
  • the remote controller 3 may be provided with a plurality of buttons or switches as input means, and may be equipped with a touch input means such as a touch pad as the case may be. At this time, the remote controller 3 is provided with a key for the operation mode setting and a generator mode key during the operation setting of the air conditioner so that data corresponding to the generator mode key is transmitted to the indoor unit 1 so that the indoor unit is set to the generator mode do.
  • FIG. 3 is a block diagram showing the control arrangement of the air conditioner unit according to the present invention.
  • the air conditioner includes a power unit 120, a driving unit 130, a voltage sensing unit 140, a sensing unit 150, a data unit 160, an input unit 170, a display unit 180, And a controller 110 for controlling overall operations.
  • the control arrangement of the air conditioner can be applied to both the indoor unit and the outdoor unit.
  • the compressor and the outdoor fan are driven by the driving unit, and the indoor fan is operated by the driving unit of the indoor unit.
  • the operating power may be supplied to either the outdoor unit or the indoor unit, converted from the power unit, and then supplied through the power line.
  • the indoor unit may further include a communication unit (not shown) for receiving data from the remote control 3.
  • the communication unit receives data on the operation setting from the remote controller 3 and applies it to the control unit 110. [ At this time, depending on the type or the communication method of the remote control 3, the communication unit not only receives the data of the remote control 3, but also can transmit the data to the remote control 3 in accordance with the control command of the control unit 110. [
  • the power supply unit 120 rectifies the power supplied to the air conditioner and supplies operating power to the respective units.
  • the power supply unit 120 rectifies the three-phase AC power, smoothes it, and converts it into DC power.
  • the voltage sensing unit 140 measures a voltage supplied from the power supply unit 120 and inputs the measured voltage to the control unit 110. At this time, the voltage sensing unit 140 measures the magnitude of the smoothed DC voltage of the power supply unit 120.
  • the driving unit 130 reconverts the DC power of the power supply unit 120 and supplies the DC power to the compressor motor or the fan motor to operate the compressor and the fan.
  • the driving unit 130 may include a compressor driving unit and an outdoor fan driving unit of an outdoor unit, and an indoor fan driving unit of an indoor unit.
  • the sensing unit 150 includes a plurality of sensors installed inside or outside the air conditioner.
  • the sensing unit 150 includes a sensor for measuring temperature, pressure, voltage, current, and rotation speed, and inputs measured data to the control unit 110.
  • the input unit 170 includes at least one predetermined input means such as a button, a switch, and a touch pad.
  • a predetermined input means such as a button, a switch, and a touch pad.
  • the input unit 170 has a mutual layer structure with the display unit of the display unit 180, which will be described later, it may be referred to as a touch screen.
  • the input unit 170 inputs a predetermined signal to the control unit 110 as the input means is operated.
  • the control unit 110 allows the input unit 170 to set the operation of the air conditioner according to the operation of the input means, and allows the air conditioner to start or end the operation.
  • the input unit 170 is provided with an operation mode setting key to input data according to the generator mode setting.
  • the display unit 180 includes display means for outputting numbers, characters, special characters or images.
  • the display unit 180 outputs the operation setting for the operation mode, the temperature, the air volume, and the like of the air conditioner, and outputs the operation state of the air conditioner. Also, the display unit 180 displays the current temperature measured through the sensing unit 150.
  • the air conditioner includes a speaker (not shown) or a buzzer (not shown) for outputting a predetermined sound effect or a warning sound in addition to the display unit, and includes at least one lamp for indicating various states, can do.
  • the data unit 160 stores control data for controlling the operation of the air conditioner and data for operating the air conditioner, and data measured through the operation sensing unit 150 is stored.
  • the data unit 160 stores not only the operation setting but also the operation mode data, the power consumption data calculated according to the reference value of the power consumption set in the generator mode, the measured voltage, and the voltage, The set value corresponding to the overload of the motor is stored.
  • the control unit 110 sets and controls the operation so that the air conditioner operates according to the data input through the remote controller 3 or the input unit 170 and outputs the operation status through the display unit 180.
  • the control unit 110 controls the transmission and reception of mutual data in the outdoor unit and the indoor unit to operate according to the operation setting and controls the power consumption of the air conditioner to exceed the predetermined reference value in the generator mode setting according to the operation mode .
  • the control unit 110 determines whether the power source is overloaded according to a voltage value detected and inputted from the voltage sensing unit 140.
  • the supplied power source is a power source connected to the air conditioner and supplying power to the air conditioner, and may be a commercial power source or a generator power source supplied from a power station.
  • the controller 110 determines whether the generator is overloaded in response to the sensed voltage value and controls the operation.
  • the control unit 110 compares the sensed voltage with a preset value to determine a load state of the generator and then applies a control command to the driving unit 130 to control the operation of the compressor. Accordingly, the driving unit 130 controls the operation of the compressor by increasing or decreasing the operating frequency of the compressor.
  • the controller 110 controls the power consumption calculated according to the voltage not to exceed the reference value, and also controls the operation of the air conditioner by determining the load state of the power supplied according to the voltage.
  • the generator mode is a mode in which the air conditioner can be continuously operated even when the power supplied to the air conditioner is low voltage, the voltage fluctuation is large, or the capacity of the generator is low, even with an unstable input power source. For example, when the air conditioner is connected to a small-capacity generator, or when the supplied power is a low voltage.
  • the control unit 110 sets a reference value of the power consumption at about 60% to 80% based on the maximum power consumption value of the air conditioner, Control is performed so that the power consumption of the tuner is not exceeded by the reference value of the power consumption set. At this time, the reference value can be changed according to the capacity of the air conditioner and the maximum power consumption value.
  • the controller 110 can automatically set the generator mode by recognizing the generator power when the generator 110 is connected to the generator according to the characteristics of the input power source. For example, by analyzing the waveform of the electric field, it is possible to judge whether or not the generator is connected according to the total harmonic distortion (THD).
  • TDD total harmonic distortion
  • control unit 110 calculates the amount of power consumed by the air conditioner according to the capacity and load of the air conditioner corresponding to the voltage input through the voltage sensing unit 140, And controls so that the power consumption of the air conditioner does not exceed a predetermined reference value.
  • the controller 110 controls the driving unit 130 so as to reduce the operating frequency of the compressor to limit the increase of the power consumption. If the power consumption decreases, the operation frequency of the compressor increases, .
  • the controller 110 changes the maximum value of the operation frequency of the compressor, that is, the maximum operable frequency so that the compressor is prevented from operating at a frequency higher than the maximum operation frequency.
  • the control unit 110 controls the operation frequency of the compressor according to the power consumption as described above and determines the load state of the power source, that is, the generator power, corresponding to the measured voltage, So that the load on the power source is changed.
  • the operation frequency control of the compressor according to the load state of the power source is controlled so that the overload of the power source is eliminated by controlling the operation frequency of the compressor when the power source is overloaded in accordance with the load state of the input power source, do.
  • the power supply unit 120 includes a power input unit 121, a rectifying unit 122, and a DC link unit 123.
  • the power source of the commercial power source 20 or the generator 10 is connected to the air conditioner and the power is supplied to the power input unit 121.
  • the rectifying unit 122 rectifies the input power, and the DC link unit 123 smoothes the rectified power. Accordingly, the inputted AC power is converted into DC power.
  • the driving unit 130 includes an inverter 131 for driving the compressor 191. And a first fan driving unit (not shown) for driving the outdoor fan 192 or the indoor fan 193. At this time, the compressor 191, the outdoor fan 192, and the indoor fan 193 act as a load to the power source.
  • the inverter 131 converts the rectified and smoothed DC power of the power supply unit 120 into AC power and supplies the AC power to the motor of the compressor 191 to operate the compressor.
  • the outdoor fan 192 is connected to the driving unit 130 and rotates as the motor is operated by the first fan driving unit.
  • the outdoor fan (192) discharges the heat-exchanged air to the outside through the outdoor heat exchanger (194).
  • the indoor fan 193 rotates as the motor is operated by the second fan driving unit, and the heat-exchanged air in the indoor heat exchanger 195 is discharged to the room.
  • the voltage sensing unit 140 measures the voltage of the DC link unit 123 and inputs the voltage to the control unit 110 (202).
  • the control unit 110 controls the driving unit 130 in accordance with the voltage of the DC link unit 123 since the voltage of the DC link unit 123 varies according to the load state of the power source.
  • the control unit 110 automatically recognizes the generator power or sets the generator mode in response to the data 206 received from the remote control 3.
  • the control unit 110 controls the compressor 191 by applying a control command to the inverter 131 of the driving unit 130 corresponding to the amount of power calculated according to the voltage when the generator mode is set, Increase.
  • the driving unit 130 changes the operating frequency of the compressor 191 in response to a control command of the controller 110 and causes the compressor to operate at a set operating frequency.
  • the inverter 131 controls the compressor 191 to operate at the initial operating frequency during the operation of the air conditioner, and controls the operation frequency to rise as the load increases.
  • the inverter 131 controls the operation frequency of the compressor 191 so as not to increase by a predetermined amount or more, in accordance with the control command of the controller 110, even if the load of the air conditioner increases.
  • the control unit 110 controls the operation frequency of the compressor to be changed according to the amount of power to be calculated and applies the control command to the driving unit 130 so that the operation frequency of the compressor is maintained when the amount of power is within the predetermined value range.
  • the control unit 110 determines the load state of the power supply 10 or 20 corresponding to the voltage 202 of the DC link unit 123 while controlling the power consumption to not exceed the reference value as described above, Controls the operation frequency of the compressor 191 acting as a load or controls the outdoor fan 192 or the indoor fan 193 (204) (205) to adjust the load.
  • the control unit 110 determines that the power supply is overloaded when the voltage of the DC link unit 123 decreases below the reference value since the voltage 202 of the DC link unit 123 fluctuates according to the load state of the power supply So that the operation frequency of the compressor 191 is reduced so that the load on the power source is reduced and the operation frequency of the compressor 191 is increased when the voltage of the DC link unit 123 is increased due to the load reduction. At this time, the control unit 110 controls the operation frequency of the compressor 191 according to the load state of the power supply, and controls the operation frequency of the compressor within the range where the power consumption calculated according to the voltage does not exceed the reference value.
  • FIG. 5 is a diagram for describing an operation frequency control for power consumption control of the air conditioner according to the present invention.
  • the controller 110 when setting the generator mode, sets a reference value for the power consumption based on the maximum power consumption of the air conditioner. For example, in the case of an air conditioner of 1 KW, the controller 110 can set 600 W to the reference value TG1.
  • the control unit 110 compares the set reference value with the calculated amount of power so as to control the amount of power not to exceed the reference value of 600 W. At this time, the controller 110 separately sets the second reference value TG2 so that the amount of power does not exceed the reference value.
  • the reference value hereinafter referred to as the first reference value TG1
  • the second reference value TG2 can be set to about 500W.
  • the controller 110 increases the operation frequency of the compressor 191 without any limitation.
  • the power consumption of the air conditioner is also increased (S11).
  • the control unit 110 calculates the power consumption corresponding to the measured voltage and applies a control command to the driving unit 130 so that the compressor 191 is controlled when the calculated power consumption reaches the second reference value TG2. At this time, the driving unit 130 limits the operation frequency of the compressor to no longer increase according to the control command of the control unit 110.
  • the driving unit 130 maintains the operating frequency of the compressor 191.
  • the controller 110 decreases the operation frequency of the compressor to control the load on the power source. That is, the control unit 110 controls the operation frequency of the compressor 191 with respect to the power consumption, and controls the operation frequency of the compressor according to the overload of the power supply.
  • the controller 110 decreases the operating frequency of the compressor 191 to reduce the amount of power consumed (S12). At this time, the controller 110 controls the power consumption to not exceed the first reference value TG1, and controls the operation frequency of the compressor 191 to decrease when the first reference value TG1 is exceeded.
  • the cooling capacity also decreases, so that the controller 110 controls the operation frequency of the compressor to increase again when the power consumption falls within the first area A .
  • control unit 110 changes the maximum value of the operation frequency of the compressor, that is, the maximum operation frequency that can be operated, in accordance with the power consumption so that the compressor is prevented from operating beyond the maximum operation frequency. Accordingly, the control unit 110 ensures that the power consumption of the air conditioning does not exceed the reference value.
  • FIG. 6 is a diagram illustrating a change in power consumption according to the mode setting of the air conditioner according to the present invention.
  • FIG. 6 (a) is a view showing a change in power consumption when the air conditioner is connected to a generator and performing a normal operation
  • Fig. 6 (b) is a diagram showing a change in power consumption when the generator mode is set .
  • the air conditioner starts operation again after waiting for a predetermined time according to the protection circuit logic. However, since the capacity of the generator is still limited, the air conditioner is repeatedly started and then restarted. This phenomenon may cause the user to feel uneasy, cause the generator to fail, and possibly damage the air conditioner.
  • the controller 110 controls the operation frequency of the compressor 191 at the start of operation to limit the power consumption
  • the power consumption of the air conditioner is maintained at about 60% of the maximum power consumption after a certain value is increased according to the set reference value (S2).
  • the air conditioner when the air conditioner is connected to a general commercial power supply, when the air conditioner starts to operate, the compressor 191 operates according to the operation setting, and the power consumption increases with time.
  • the air conditioner When the compressor 191 is operated at the maximum, the air conditioner maintains the maximum power consumption as shown (S1).
  • the power consumption of the air conditioner is limited to 60 to 80% of the maximum power consumption when the generator mode is set based on the maximum power consumption of the air conditioner in the normal operation.
  • control unit 110 controls the operation frequency of the compressor 191 to decrease. Therefore, even if the compressor is controlled, the power consumption is kept below the set reference value.
  • FIG. 7 is a graph illustrating power consumption and operating frequency according to the mode setting of the air conditioner according to the present invention.
  • FIG. 7 shows changes in the operating frequency and power consumption of the compressor according to the passage of time when the air conditioner is connected to the generator of 1 KWVA and the generator mode is set.
  • the controller 110 sets a reference value (first reference value) S23 for the power consumption as the generator mode is set.
  • the reference value may be set within a range of about 60 to 80% based on the maximum power consumption of the air conditioner.
  • control unit 110 sets the generator mode in accordance with the data of the remote controller 3 or the input unit 170.
  • the control unit 110 may determine whether the power supplied to the air conditioner is a generator power or a commercial power through a separate sensing unit. When the generator power is supplied, the controller 110 can automatically set the generator mode in response to the sensing signal of the sensing means.
  • the controller 110 calculates the power consumption of the air conditioner corresponding to the voltage measured during operation and controls the calculated power consumption so as not to exceed the reference value.
  • control unit 110 controls the operation frequency of the compressor 191 by applying a control command to the driving unit 130 .
  • the drive unit 130 When the power consumption is equal to or greater than the second reference value and less than the reference value S23 (first reference value), the drive unit 130 maintains the current operating frequency of the compressor 191 because it belongs to the second region B in FIG. do. However, when it is determined that the power supply is in the overload state, the controller 110 controls the operation frequency of the compressor 191 within a range where the power consumption does not exceed the reference value.
  • the operating frequency of the compressor is maintained at a constant value, and the power consumption does not exceed the set reference value although the value of the compressor is fluctuated due to the variation of the input voltage or the load.
  • the input power source that is, the generator power source.
  • the air conditioner can be operated for a long time without stopping the operation, and the constant cooling ability can be maintained.
  • FIG. 8 is a view showing a change in the smoothed DC power of the air conditioner according to the present invention.
  • 8A is a view showing a voltage change when an overload is applied to a power supply connected to the air conditioner
  • FIG. 8B is a graph showing a change in voltage when the operation of the air conditioner is controlled to adjust the load Fig.
  • the voltage of the DC link unit 123 rapidly decreases.
  • the air conditioner is connected to the generator, there is a limit to the generating capacity of the generator when other home appliances other than the air conditioner are connected, so that the power is overloaded and the voltage supplied to the air conditioner is reduced. In this case, not only the air conditioner but also connected household appliances can not operate normally.
  • the voltage detector 140 measures the voltage of the DC link unit 123, and the controller 110 determines whether the power supply is overloaded in accordance with the voltage change S32 .
  • the control unit 110 immediately decreases the load to decrease the voltage of the DC link unit 123 ) Is no longer reduced.
  • control unit 110 decreases the operation frequency of the compressor 191 by decreasing the load on the power source by applying the control command to the driving unit 130, and the voltage of the DC link unit 123 increases again, 123) reaches a predetermined value, the operation frequency is maintained.
  • control unit 110 may increase or decrease the operation frequency of the compressor according to the voltage change of the DC link unit 123.
  • controller 110 may control the rotational speed of the outdoor fan 192 or the indoor fan 193 to reduce the load.
  • the controller 110 controls the driving unit 130 to reduce the operating frequency of the compressor, (T12), the operation frequency of the compressor is maintained.
  • the control unit 110 controls the operation frequency of the compressor to maintain the voltage of the DC link unit 123 at a constant level when the operation frequency is maintained at a predetermined value. If the voltage of the DC link unit 123 is higher than the predetermined voltage of the DC link unit 123, the control unit 110 controls the voltage of the DC link unit 123, Value, the operation frequency of the compressor 191 is increased. However, the control unit 110 controls the operation frequency of the compressor 191 to increase within a range in which the power consumption calculated by the voltage does not exceed the reference value TG1.
  • FIG. 9 is a flowchart showing a control method of the air conditioner according to the present invention.
  • the voltage sensing unit 140 senses the voltage of the DC power source of the DC link unit 123 And inputs it to the control unit 110 (S320).
  • the controller 110 compares the measured voltage with the set value and controls the operation of the compressor.
  • the control unit 110 applies a control command to the driving unit 130 so that the operating frequency of the compressor 191 is reduced when the measured voltage is less than the first set value S330.
  • the driving frequency of the compressor 191 is reduced by the driving unit 130, and the voltage of the DC link unit 123 rises accordingly.
  • the control unit 110 causes the operation frequency of the compressor 191 to be maintained (S360). At this time, the second set value is set to be larger than the first set value.
  • the controller 110 applies a control command to the driving unit 130 to increase the operating frequency of the compressor (S370).
  • the driving frequency of the compressor 191 is increased by the driving unit 130.
  • control unit 110 increases the operating frequency of the compressor within the range where the power consumption is kept below the reference value.
  • the controller 110 controls the operation frequency of the compressor 191 to be reduced.
  • the control unit 110 increases or decreases the operating frequency of the compressor in response to a change in the voltage of the DC link unit 123 measured by the voltage sensing unit 140, If the voltage of the DC link unit is increased while the voltage of the DC link unit is not decreased to the set value (the first set value), control is performed so that the cooling capacity is increased by increasing the operation frequency (S320 to S370).
  • the controller 110 stops the operation of the air conditioner (S390).
  • FIG. 10 is a graph showing changes in the operating frequency and voltage of the air conditioner according to the present invention.
  • FIG. 10 (a) is a view showing a change in voltage and a compressor operating frequency over time when the air conditioner is connected to a generator, and FIG. 10 (b) In which the voltage and the operation frequency of the compressor are changed.
  • the operation of the air conditioner is stopped and the air conditioner is restarted after a predetermined time. However, as described above, the air conditioner is stopped again, and the operation and stop are repeated.
  • the controller 110 maintains the operating frequency of the compressor 191 when the voltage of the DC link unit 123 is maintained above the set value and the voltage is maintained constant, So that the cooling frequency is increased so as to increase the cooling capacity. At this time, if the voltage of the DC link unit 123 decreases again, control is repeated so that the operation frequency of the compressor is decreased again so as not to decrease to the set value or less.
  • the air conditioner continuously operates for a long time while eliminating the overload problem of the generator.
  • the present invention is not necessarily limited to these embodiments, as all the constituent elements constituting the embodiment of the present invention are described as being combined and operated in one. Within the scope of the present invention, depending on the embodiment, all of the components may operate selectively in combination with one or more.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

La présente invention concerne un climatiseur et son procédé de commande. Le climatiseur comprend : une unité d'alimentation électrique, reliée à un générateur, qui reçoit la puissance du générateur, la redresse et la lisse et qui fournit une puissance CC ; une unité de détection de tension destinée à mesurer la tension de la puissance CC provenant de l'unité d'alimentation électrique ; une unité d'attaque, qui convertit la puissance CC et la fournit à un compresseur et qui commande l'attaque du compresseur ; et une unité de commande afin de reconnaître un mode de fonctionnement lié à la puissance du générateur et de régler un mode de générateur, l'unité de commande déterminant, dans le cas d'un fonctionnement en mode générateur, si la puissance du générateur est surchargée ou non en réponse à la tension mesurée par l'unité de détection de tension et l'unité de commande limitant le fonctionnement du compresseur lorsqu'il est déterminé que la puissance du générateur est surchargée. Par conséquent, le fonctionnement est commandé par la détection indiquant si la puissance fournie est surchargée ou non, de sorte que la puissance fournie ne puisse pas être surchargée, que de fréquentes opérations de marche/arrêt du climatiseur soient évitées, ce qui garantit des opérations continues et que tout dommage à l'alimentation électrique et au produit soit empêché, ce qui offre à l'utilisateur un côté commode et des environnements plus confortables.
PCT/KR2015/005966 2014-06-12 2015-06-12 Climatiseur et son procédé de commande Ceased WO2015190886A1 (fr)

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KR101797054B1 (ko) * 2016-04-14 2017-11-14 한국철도기술연구원 인공지능 열감지-속도제어 마이크로 쿨링 팬을 이용한 쿨링기능을 가지는 태양광 발전 방음유닛, 이를 이용하여 구축되는 태양광 발전 방음벽 및 태양광 발전 방음유닛의 쿨링방법
CN107388481A (zh) * 2017-06-30 2017-11-24 广东美的制冷设备有限公司 一种空调器、空调器的控制方法及计算机装置
KR102111409B1 (ko) * 2017-12-18 2020-05-15 엘지전자 주식회사 공기조화기
KR101990143B1 (ko) * 2017-12-18 2019-06-18 엘지전자 주식회사 압축기 제어 장치
CN108317695B (zh) * 2017-12-26 2020-08-25 青岛海尔空调器有限总公司 一种自适应发电机空调控制方法及装置
CN109539496B (zh) * 2018-10-19 2021-07-23 重庆海尔空调器有限公司 一种空调器自适应控制方法和空调器
KR102565779B1 (ko) * 2018-11-14 2023-08-11 엘지전자 주식회사 천장 팬 및 그 제어방법
CN112503737A (zh) * 2020-12-04 2021-03-16 中山长虹电器有限公司 一种空调适配小功率发电机的运行方法及系统
CN115406071B (zh) * 2021-05-28 2025-06-27 美的集团股份有限公司 空调器功率控制方法、装置、存储介质及空调器
CN114216217B (zh) * 2021-12-02 2023-08-15 青岛海尔空调器有限总公司 用于空调供电调节的方法及装置、空调
CN114183902A (zh) * 2021-12-07 2022-03-15 珠海格力电器股份有限公司 空调器的控制方法及装置、空调器、计算机可读存储介质
CN116080340B (zh) * 2022-12-30 2025-09-05 中联重科股份有限公司 电平衡的控制方法、控制装置及起重机

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CN105318494A (zh) 2016-02-10
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