KR20090052167A - Air conditioner - Google Patents

Abstract

The present invention includes a plurality of outdoor units, wherein the first outdoor unit includes a converter for receiving commercial AC power and converting the same into a first DC power source, and converting the AC power using the first DC power source to at least one first outdoor unit. At least one first outdoor unit fan inverter for driving a motor for a fan, and the second outdoor unit includes a rectifier for receiving commercial AC power and converting it into a second DC power, and receiving and converting a second DC power to AC power. An air conditioner comprising at least one second outdoor unit fan inverter for driving at least one second outdoor unit fan motor. As a result, in the multi-type air conditioner in which power is required for each outdoor unit, DC power can be easily generated, and manufacturing cost is reduced.

Electric Motor, Air Conditioner, DC Power, Multi, Outdoor, Fan, Inverter

Description

Air Conditioner

The present invention relates to an air conditioner, and more particularly, to an air conditioner for simply generating a DC power source in a multi-type air conditioner.

An air conditioner is a device that is disposed in a room, a living room, an office, or a business store to adjust a temperature, humidity, cleanliness, and airflow of an air to maintain a comfortable indoor environment.

Air conditioners are generally divided into one-piece and separate types. The integrated type and the separate type are functionally the same, but the integrated type integrates the functions of cooling and heat dissipation to install a hole in the wall of the house or hang the device on the window, and the separate type installs an indoor unit that performs cooling / heating on the indoor side and outdoor. On the side, an outdoor unit that performs heat dissipation and compression functions was installed, and two separate devices were connected by refrigerant pipes.

In the air conditioner, an electric motor is used for a compressor, a fan, and the like, and an electric motor control device for driving the air conditioner is used. The motor controller of the air conditioner receives a commercial AC power, converts the DC voltage into DC voltage, converts the DC voltage into a commercial AC power of a predetermined frequency, and supplies the same to the electric motor, thereby controlling a motor such as a compressor or a fan.

On the other hand, in consideration of the capacity and efficiency of the air conditioner, a multi-type air conditioner using a plurality of indoor units or a plurality of indoor units in one outdoor unit is used. In such a multi-type air conditioner, the parts are mounted in large quantities, and manufacturing cost reduction and efficient arrangement are discussed.

An object of the present invention is to provide an air conditioner in which a production cost is reduced by simply generating a DC power source in a multi-type air conditioner.

An air conditioner according to an embodiment of the present invention for solving the above-described and other problems includes a plurality of outdoor units, the first outdoor unit, a converter for receiving a commercial AC power to convert the first DC power source, At least one first outdoor unit fan inverter for converting into an AC power source using a first DC power source to drive at least one first outdoor unit fan motor, wherein the second outdoor unit receives a commercial AC power source and receives a second DC power source. And a rectifier for converting the voltage into a second DC power source, and converting the second DC power into AC power to drive the at least one second outdoor unit fan motor.

As described above, in the air conditioner according to the embodiment of the present invention, in the multi-type air conditioner requiring power for each outdoor unit, the DC outdoor power can be easily generated in the second outdoor unit, thereby reducing the manufacturing cost. In addition, by efficiently disposing the control unit in the control box in the outdoor unit, the performance and stability are increased.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a bird's eye view of an air conditioner according to the present invention, FIG. 2 is a view illustrating the air conditioner of FIG. 1, and FIG. 3 is a configuration diagram illustrating the air conditioner of FIG. 1.

Referring to the drawings, the air conditioner according to the present invention, for cooling or heating operation, a plurality of indoor units (I '), indoor units (I') and refrigerant pipe (P ') installed in the interior of the building. A plurality of outdoor units (M) (S1) (S2) connected through, and a control device (not shown) for controlling the indoor unit (I ') and the outdoor unit (M) (S1) (S2).

The outdoor unit (M) (S1) (S2) is driven by the request of at least one of the indoor unit (I '), and the outdoor unit (M) (S1) (as the cooling / heating capacity required by the indoor unit (I') increases. The operation number of S2) and the operation number of the compressor installed in the outdoor unit M (S1) (S2) are increased.

Each indoor unit (I ') is an indoor heat exchanger (51) for exchanging indoor air and refrigerant in a room where each indoor unit (I') is installed, and an indoor heat exchanger (51) for indoor air in a room where each indoor unit (I ') is installed. Indoor blower 52 for blowing in the air), and the indoor electromagnetic expansion valve 54, which is an indoor flow rate control unit 54 that is controlled according to the supercooling and superheating degree during the cooling operation.

The indoor heat exchanger 51 is an evaporator that allows the indoor air to be cooled while the liquid refrigerant is sucked during the cooling operation of the air conditioner and the sucked liquid refrigerant is evaporated by the indoor air in which the indoor unit I 'which requests the cooling operation is installed. The gaseous refrigerant is sucked during the heating operation of the air conditioner, and the sucked gaseous refrigerant is acted as a condenser that causes the indoor air temperature to rise while condensed by the indoor air in which the indoor unit I which requested the heating operation is installed.

The indoor heat exchanger 51 may be provided with an indoor temperature sensing unit 56 capable of sensing the temperature of the refrigerant passing through the indoor heat exchanger 51.

The indoor blower 52 is controlled by an indoor unit controller (not shown) to generate power by being connected to the indoor electric motor 52a for generating power and being rotated by the indoor electric motor 52a to generate a blowing force. It consists of an indoor fan 52b.

The plurality of outdoor units M, S1, and S2 are main outdoor units M that are always operated regardless of the load of the indoor unit I 'and sub outdoor units S1 that are selectively operated according to the load of the indoor unit I'. ) S2.

The main outdoor unit M and the sub outdoor unit S1 and S2 include an outdoor heat exchanger 60 for exchanging outdoor air and a refrigerant, an outdoor blower 61 for blowing outdoor air to the outdoor heat exchanger 60, An accumulator 62 for extracting only the gas refrigerant, two compressors 63 and 64 for compressing the gas refrigerant extracted from the accumulator 62, a four-way valve 65 for switching the refrigerant flow, and supercooling during heating operation. Outdoor electronic expansion valve 66 which is controlled according to the degree and superheat degree includes an outdoor electronic expansion valve (66).

The outdoor heat exchanger 60 acts as a condenser to suck the gaseous refrigerant during the cooling operation of the air conditioner and condense the sucked gaseous refrigerant by the outdoor air, and during the heating operation of the air conditioner, the liquid refrigerant is sucked and sucked. It acts as an evaporator that allows the liquid refrigerant to be evaporated by the outdoor air.

The outdoor heat exchanger 60 may further include an outdoor temperature sensing unit 90 capable of sensing an outdoor temperature in which the outdoor units M, S1, and S2 are installed.

The outdoor blower 61 is connected to an outdoor electric motor 61a that generates power by being controlled by an outdoor unit controller (not shown), and is blown while being rotated by the power of the outdoor electric motor 61a connected to the outdoor electric motor 61a. It consists of an outdoor fan (61b) for generating a.

One of the two compressors 63 and 64 of the main outdoor unit M may be an inverter compressor, and the other may be a constant speed compressor. Meanwhile, the two compressors 63 and 64 of the sub outdoor units S1 and S2 may be constant speed compressors.

The suction side and the discharge side of the compressors 63 and 64 may be provided with a low pressure sensing unit 92 and a high pressure sensing unit 93 for sensing suction / discharge pressures of the compressors 63 and 64, respectively.

The accumulator 62 may be connected to two compressors 63 and 64 together for common use.

Figure 4 is a block diagram showing an air conditioner according to an embodiment of the present invention.

Referring to the drawings, the air conditioner 400 according to an embodiment of the present invention includes a plurality of outdoor units, among which the first outdoor unit 401 includes a converter 410 and at least one fan inverter 422 and 424. ), At least one fan motor 452, 454, and the second outdoor unit 402 includes a rectifier D1, at least one fan inverter 426, 428, and at least one fan motor 456, 458.

The first outdoor unit 401 includes a compressor inverter 420, a compressor microcomputer 434, a fan microcomputer 436, a main microcomputer 430, an inverter compressor 450, a constant speed compressor 451, and a filter. The unit 405 and the smoothing capacitor C are further included.

In addition, the second outdoor unit 402 further includes a fan microcomputer 439, a main microcomputer 438, at least one constant speed compressor 457 and 459, a filter unit 407, and a smoothing capacitor C1.

First, the first outdoor unit 401 will be described.

The filter unit 405 removes noise components between the commercial AC power supply and the converter. To this end, the filter unit 4050 operates as a noise filter. Passive elements such as resistors, inductances, and capacitors may be used as components of the noise filter, but other active elements may be used.

Although not shown in the drawings, a plurality of reactors may be provided in addition to the filter unit 405. The reactor corrects the power factor and operates with the converter 410 including the switching element to boost the commercial AC power supply, and further limit the harmonic current component together with the noise filter.

The converter 410 converts commercial AC power into DC power and outputs the DC power. The commercial AC power source may be a three-phase AC power source as shown in the drawing, but is not limited thereto and may be a single-phase AC power source. The internal structure of the converter 410 also varies according to the type of commercial AC power source. For example, in the case of a single phase AC power supply, a half bridge type converter in which two switching elements and four diodes are connected may be used, and in the case of a three phase AC power supply, six switching elements and six diodes may be used. The converter 410 includes a plurality of switching elements, and performs a boosting operation, a power factor improvement, and a DC power conversion by a switching operation. Of course, it is also possible to use only a diode as the converter 410.

The smoothing capacitor C is connected to the output terminal of the converter 410. The converted first DC power output from the converter 410 is smoothed. Hereinafter, the output terminal of the converter 410 is also referred to as a first dc terminal or a first dc link terminal. In addition, the first DC power smoothed in the first dc terminal is also referred to as a first dc terminal voltage.

The first DC power source (first dc terminal voltage) is applied to the compressor inverter 420 and the fan inverters 422 and 424 of the first outdoor unit. By using a single converter 410 provided in the first outdoor unit 401, a plurality of inverters 420, 422, 424 use the first dc terminal voltage, thereby reducing manufacturing costs.

The compressor inverter 420 includes a plurality of inverter switching elements, and converts the first DC power supply (first dc end voltage) into a three-phase AC power supply having a predetermined frequency by on / off operation of the switching device. Specifically, the upper arm switching element and the lower arm switching element connected to each other in a pair, a total of three pairs of upper and lower arm switching elements are connected in parallel to each other.

The three-phase AC power output from the compressor inverter 420 is applied to each phase of the compressor motor 450. Here, the compressor motor 450 includes a stator and a rotor, and AC power of each phase of a predetermined frequency is applied to a coil of each stator so that the rotor rotates. The compressor motor 450 may be a BLDC motor, but is not limited thereto, and may be in various forms such as an induction motor or a synRM motor.

The compressor microcomputer 434 outputs a switching control signal Sic to control the compressor inverter 420. The switching control signal Sic is a PWM switching control signal and may be generated based on the output current flowing through the compressor motor 450 or the induced counter electromotive force.

Fan inverters 422 and 424 are similar to compressor inverters 420. That is, a plurality of inverter switching elements are provided, and the first DC power source (first dc end voltage) smoothed by the on / off operation of the switching element is converted into a three-phase AC power source of a predetermined frequency and output. Three-phase alternating current power source of predetermined frequency drives fan motors 452 and 454. The fan motors 452 and 454 may be BLDC motors, but are not limited thereto, and may be in various forms such as induction motors or synRM motors.

The fan microcomputer 436 outputs the switching control signals Sfc1 and Sfc2 to control the fan inverters 422 and 424. The switching control signals Sfc1 and Sfc2 are PWM switching control signals and may be generated based on an output current flowing through the fan motors 452 and 454 or a position signal by a sensor attached to the fan motors 452 and 454.

The fan microcomputer 436 controls the plurality of fan inverters 422 and 424 together as shown in the drawing. Since the number of microcomputers is shortened, the cost can be reduced.

Meanwhile, the converter micom 432 outputs a switching control signal Scc to control the converter 410. The switching control signal Scc may be generated based on a dc terminal voltage and an input current from a commercial AC power supply. It may also be generated based on zero crossing of the input voltage from a commercial AC power supply.

The main microcomputer 430 controls the operations of the converter microcomputer 432, the microcomputer 434 for compressors, and the microcomputer 436 for fans. In addition, communication with an indoor unit (not shown), the second outdoor unit 402, and the like is performed.

On the other hand, the constant speed type compressor 451 is driven at a constant speed by using a commercial AC power source without using the compressor inverter described above. Therefore, the above-described direct current power (dc terminal voltage) is not used. However, in order to remove noise or harmonics, it operates by using a commercial AC power source that has passed through the filter unit 405 described above. By using the constant speed compressor 451 in addition to the inverter compressor 450, it is possible to prepare for the case where the capacity required by the indoor unit is large.

Next, the second outdoor unit 402 will be described.

The filter unit 407 is similar to the filter unit 405 of the first outdoor unit 401. The filter unit 407 may be a noise filter for removing noise components between the commercial AC power supply and the constant speed compressors 457 and 459.

The rectifier D1 converts commercial AC power into a second DC power and outputs the same. The commercial AC power source may be a three-phase AC power source as shown in the drawing, but is not limited thereto and may be a single-phase AC power source. The internal structure of the rectifier D1 also varies according to the type of commercial AC power source. For example, in the case of a single phase AC power supply, four diodes may be used. In the case of a three phase AC power supply, six diodes may be used. The rectifier D1 converts commercial AC power into a second DC power by using the one-way conduction characteristic of the diode element.

The smoothing capacitor C1 is connected to the output terminal of the rectifying unit D1. The converted second DC power source output from the rectifying unit D1 is smoothed. Hereinafter, the output terminal of the rectifying unit D1 is also referred to as a second dc terminal or a second dc link terminal. In addition, the second DC power source smoothed in the second dc terminal is also referred to as a second dc terminal voltage.

The fan inverters 426 and 428 include a plurality of inverter switching elements, and are generated by the switching element on and off via the rectifying unit D1 and the smoothing capacitor C1 of the second outdoor unit. (Second dc terminal voltage) is converted into a three-phase AC power supply of a predetermined frequency and output. Three-phase AC power of a predetermined frequency drives the motors 456 and 458 for the fan. The fan motors 456 and 458 may be BLDC motors. However, the fan motors 456 and 458 may be in various forms, such as an induction motor or a synRM motor.

The fan microcomputer 439 outputs the switching control signals Sfc3 and Sfc4 to control the fan inverters 426 and 428. The switching control signals Sfc3 and Sfc4 are PWM switching control signals and may be generated based on an output current flowing through the fan motors 456 and 458 or a position signal by a sensor attached to the fan motors 456 and 458.

The fan microcomputer 439 controls the plurality of fan inverters 426 and 428 together as shown in the drawing. Since the number of microcomputers is shortened, the cost can be reduced.

The main microcomputer 438 controls the operation of the fan microcomputer 439 described above. In addition, communication with the first outdoor unit 402 is performed.

On the other hand, the at least one constant speed compressor (457,459) is driven at a constant speed using a commercial AC power supply directly without using an inverter. However, in order to remove noise or harmonics, it operates using a commercial AC power source that has passed through the filter unit 407.

In FIG. 4, the first outdoor unit 401 operates as the main outdoor unit, and the second outdoor unit 402 operates as the auxiliary outdoor unit. Meanwhile, the air conditioner 400 according to the embodiment of the present invention may further include a third outdoor unit that operates as an auxiliary outdoor unit, as illustrated in FIGS. 1 to 3.

In one embodiment of the present invention, the first outdoor unit 401, which is the main outdoor unit, generates a first DC power supply (first dc short voltage) using the converter 410, but the second outdoor unit 402, which is an auxiliary outdoor unit, Instead of the converter 410, the rectifier D1 is used to simply generate a second DC power source (second dc short voltage). By using the rectifying unit D1 in place of the more expensive converter, the manufacturing cost can be reduced.

On the other hand, the converter micom 432 described above includes a current command generation unit that generates a current command value based on the detected first dc terminal voltage Vdc and the first dc terminal voltage command value, the generated current command value and the commercial AC power supply. The apparatus may further include a voltage command generation unit generating a voltage command value based on an input current input from the switching unit, and a switching control signal output unit generating a PWM control control signal based on the voltage command value.

In addition, the above-mentioned compressor microcomputer 434 or fan microcomputer 436 includes an estimating unit for estimating the speed based on the output current flowing to each motor, and a current command for generating a current command value based on the estimated speed and speed command value. The generation unit may further include a voltage command generation unit generating a voltage command value based on the generated current command value and the output current, and a switching control signal output unit generating a switching control signal for PWM based on the voltage command value.

5A to 5B are views showing a control box of the outdoor unit of the air conditioner according to the present invention.

FIG. 5A is a front view illustrating the control box 500 in the first outdoor unit of FIG. 4, and FIG. 5B is a cross-sectional view illustrating AA ′ of FIG. 5A.

Referring to the drawings, each unit of the first outdoor unit 401 of the air conditioner is divided into a plurality of substrates and mounted. Each of the above-described units that perform similar functions or perform correlated operations may be mounted on the same substrate or adjacent substrates.

First, the compressor inverter 420 is mounted on the first substrate 510. Next, at least one first outdoor unit fan inverter 422, 424 is mounted on the second substrate 520. The main microcomputer 430 is mounted on the third board 530, the filter unit 405 is mounted on the fourth board 540, and the terminal terminal 551 to which a commercial AC power is connected to the fifth board 550. Is mounted.

The first substrate 510 may further mount the converter 410. In addition, the compressor microcomputer 434 and the converter microcomputer 432 may be further mounted. The second substrate 520 may further include a fan microcomputer 436 in addition to the fan inverters 422 and 424. The fourth substrate 530 may further mount a plurality of reactors (not shown). The fifth substrate 550 may further mount a connection terminal 552 to which the constant speed compressor 451 is connected.

The first substrate 510 and the second substrate 520 are disposed adjacent to each other. Since the functions of the compressor inverter 420 and the fan inverters 422 and 424 are similar, the compressor inverters 420 and the fan inverters 422 and 424 are preferably arranged adjacent to each other.

The first substrate 510 and the third substrate 530 may be disposed adjacent to each other. The compressor inverter 420, the compressor microcomputer 434, and the main microcomputer 430 operate in conjunction with each other. That is, when the speed command from the main microcomputer 430 is transmitted to the microcomputer 434 for the compressor, the microcomputer 434 for the compressor generates a PWM switching control signal Sic at a predetermined frequency to generate the compressor inverter 420. To control.

The fourth substrate 540 and the fifth substrate 550 are disposed adjacent to each other. When the commercial AC power is supplied through the terminal terminal 551 to which the commercial AC power is connected, the commercial AC power is directly applied to the filter unit 405 to remove noise or remove high frequency components.

On the other hand, since the filter unit 405 performs a function of removing noise or removing high frequency, it is preferable that the filter unit 405 is disposed to minimize electric and magnetic influences on other units. To this end, in the embodiment of the present invention, a method of arranging the filter unit 405 on another plane is proposed.

That is, the substrates except for the fourth substrate 540 among the first to fifth substrates 510 to 550 may be disposed in the first region 501 in the same plane, and the fourth substrate 540 may be the first region. It may be disposed in the second region 502, which is a plane different from 501. The second area 502 is an area where a step is formed in the first area 501. That is, the fourth substrate 540 may be disposed below the third substrate 530.

The first substrate 510 and the third substrate 530 may be arranged side by side on the first side, and the second substrate and the fifth substrate may be side by side on the second side opposite to the first side. Referring to FIG. 4, the first substrate 510 including the converter 410, the microcomputer 432 for the converter, the microcomputer 434 for the compressor, the inverter microprocessor 420, and the main microcom 430 may be included. The three substrates 530 may be arranged side by side. In addition, the second substrate 520 including the fan inverters 422 and 424 and the microcomputer 436 for the fan and the terminal terminal 551 for supplying the commercial AC power may be arranged side by side.

In addition, the first substrate 510 and the second substrate 520 may be disposed on a third side surface perpendicular to the first side surface. A first substrate 510 including a converter 410, a converter microcomputer 432, a compressor microcomputer 434, a compressor inverter 420, a fan inverter 422 and 424, and a fan microcomputer 436. Since the two substrates 520 have similar functions, the two substrates 520 may be disposed adjacent to each other, and may be disposed on the third side that is the same side.

In addition, the third substrate 530 and the fourth substrate 540 may be disposed on a fourth side surface opposite to the third side surface.

Meanwhile, the control box in the second outdoor unit may be similar to the control box in the first outdoor unit. That is, each unit of the second outdoor unit 402 is divided into a plurality of substrates and mounted. Each of the above-described units that perform similar functions or perform correlated operations may be mounted on the same substrate or adjacent substrates. However, the rectifying unit D1 may be mounted on the first substrate of the second outdoor unit in place of the compressor inverter, the compressor microcomputer, the converter, and the converter microcomputer.

6 is a block diagram showing an air conditioner according to an embodiment of the present invention.

Referring to the drawings, the air conditioner 600 according to the embodiment of the present invention includes a plurality of outdoor units, among which the first outdoor unit 601, the converter 610, at least one fan inverter 622, 624 ), At least one fan motor 652, 654, and the second outdoor unit 602 includes a rectifier D1, at least one fan inverter 626, 628, and at least one fan motor 656, 658.

The first outdoor unit 601 includes a filter unit 605, a compressor inverter 620, a main microcomputer 630, a microcomputer 632, a fan microcomputer 636, an inverter compressor 650, and a constant speed compressor. 651, and smoothing capacitor (C).

In addition, the second outdoor unit 602 further includes a filter unit 607, a main microcomputer 638, a microcomputer 639 for fans, at least one constant speed compressor 657 and 659, and a smoothing capacitor C1.

The air conditioner 600 according to the embodiment of the present invention of FIG. 6 is similar to the air conditioner 400 of FIG. 4. However, there is a difference in that the converter microcomputer 432 and the compressor microcomputer 434 of FIG. 4 are used as one common microcomputer 632. The converter microcomputer 432 and the compressor microcomputer 434 may be mounted together on the same substrate, that is, the first substrate 510 in the description related to FIG. 5, and thus may be integrated into the common microcomputer 632. Thereby, manufacturing cost can be reduced.

As described above with reference to FIG. 4, the common microcomputer 632 may generate and output the converter switching control signal Scc and the inverter switching control signal Sic. In addition, overvoltage or overcurrent protection may be performed.

Since other components are the same as in FIG. 4, detailed operations will be omitted with reference to FIG. 4.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above may be modified in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

1 is a bird's eye view of an air conditioner according to the present invention.

FIG. 2 is a view of the air conditioner of FIG. 1. FIG.

3 is a configuration diagram illustrating the air conditioner of FIG. 1.

Figure 4 is a block diagram showing an air conditioner according to an embodiment of the present invention.

5A to 5B are views showing a control box of the outdoor unit of the air conditioner according to the present invention.

6 is a block diagram showing an air conditioner according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

401: first outdoor unit 402: second outdoor unit

405, 407: filter unit 410: converter

420: compressor inverter 422, 424, 426, 428: fan inverter

430,438: main microcomputer 434: compressor microcomputer

436,439: Fan microcomputer 450: Inverter compressor

451,457,459: Constant speed compressor

Claims (25)

In the air conditioner including a plurality of outdoor units, The first outdoor unit, A converter for receiving a commercial AC power and converting the first AC power; At least one first outdoor unit fan inverter for converting into an AC power source using the first DC power source to drive at least one first outdoor unit fan motor; The second outdoor unit, Rectifying unit for receiving a commercial AC power to convert to a second DC power; At least one second outdoor unit fan inverter for receiving the second DC power and converting the AC power into an AC power to drive at least one second outdoor unit fan motor. The method of claim 1, The first outdoor unit, Compressors for inverters; And An air conditioner, comprising: a compressor inverter for converting into an AC power source using the first DC power source to drive a compressor motor. The method of claim 2, The first outdoor unit, And a first outdoor unit constant speed compressor driven by using the commercial AC power source. The method of claim 1, The second outdoor unit, And at least one second outdoor unit constant speed compressor driven by using the commercial AC power source. The method of claim 2, The first outdoor unit, A microcomputer for converter to control the converter; A microcomputer compressor for controlling the compressor inverter; A microcomputer for a first outdoor unit fan to control the inverter for the first outdoor unit fan; And And a first outdoor unit main microcomputer for controlling the microcomputers and communicating with an indoor unit and the second outdoor unit. The method of claim 1, The second outdoor unit, A microcomputer for a second outdoor unit fan for controlling the inverter for the second outdoor unit fan; And And a second outdoor unit main micom configured to control the second outdoor unit fan microcomputer and to communicate with the first outdoor unit. The method of claim 5, And the first outdoor unit fan microcomputer controls a plurality of first outdoor unit fan inverters together. The method of claim 6, And the first outdoor unit fan microcomputer controls a plurality of second outdoor unit fan inverters together. The method of claim 5, The first outdoor unit, And a first outdoor unit filter unit for removing noise between the commercial AC power supply and the converter. The method of claim 6, The second outdoor unit, And a second outdoor unit filter unit for removing noise between the commercial AC power supply and the rectifying unit. The method of claim 9, The first outdoor unit, A first substrate on which the compressor inverter is mounted; A second substrate on which the at least one first outdoor unit fan inverter is mounted; A third substrate on which the first outdoor unit main microcomputer is mounted; A fourth substrate on which the first outdoor unit filter unit is mounted; And And a fifth substrate mounted with a terminal terminal to which the commercial AC power source is connected. And each block is mounted on a different substrate. The method of claim 11, And the first substrate further includes the converter. The method of claim 12, And the first substrate further includes the compressor microcomputer and the converter microcomputer. The method of claim 11, And the second substrate further mounts the fan microcomputer. The method of claim 11, And the fourth substrate further includes a plurality of reactors. The method of claim 11, And the fifth substrate further includes a connection terminal to which the first outdoor unit constant speed compressor is connected. The method of claim 11, And the first substrate and the second substrate are disposed adjacent to each other. The method of claim 11, And the first substrate and the third substrate are disposed adjacent to each other. The method of claim 11, And the fourth substrate and the fifth substrate are disposed adjacent to each other. The method of claim 11, And the fourth substrate is disposed under the third substrate. The method of claim 11, The first substrate and the third substrate are disposed on a first side surface, And the second substrate and the fifth substrate are disposed on a second side surface opposite to the first side surface. The method of claim 21, And the first substrate and the second substrate are arranged on a third side surface orthogonal to the first side surface. The method of claim 22, And the third substrate and the fourth substrate are arranged on a fourth side surface opposite to the third side surface. The method of claim 13, The compressor microcomputer and the converter microcomputer is an air conditioner, characterized in that one common microcomputer. The method of claim 1, And the first and second second outdoor unit fan motors are BLDC motors.

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