KR100857319B1 - Opening and shutting testing apparatus and its method for outdoor unit's louver blade - Google Patents

Abstract

The present invention relates to an open / close detection apparatus and method for an outdoor unit louver blade, and more particularly, to an open / close detection apparatus and method for an outdoor unit louver blade to easily detect the opening and closing of the louver blade using a limit switch.

The opening and closing detection device of the outdoor unit louver blade according to the present invention includes a louver blade member including a plurality of louver blades, a driving member acting on the louver blade member to open and close the louver blades, and a first contact point when the louver blades are closed. The first and second detection sensors to generate a second contact signal when the louver blades are opened, and the first contact signal from the first and / or second detection sensors to control the drive member. And / or a microcomputer that receives the second contact signal to determine whether the louver blades are opened or closed.

Outdoor unit, louver blade, opening and shutting

Description

Opening and closing detection device and method of louver blade for outdoor unit {OPENING AND SHUTTING TESTING APPARATUS AND ITS METHOD FOR OUTDOOR UNIT'S LOUVER BLADE}

1 is a schematic configuration diagram of a louver unit according to the prior art.

2 is a partial cross-sectional perspective view showing a structure of an embodiment of a wall-mounted outdoor unit for an air conditioner, in which an open / close detection device according to the present invention is installed.

Figure 3 shows an installation coupling example of the embodiment shown in FIG.

4a and 4b are a perspective view and a partially exploded view of the louver blade member to which the opening and closing detection device according to the present invention is applied.

5A and 5B are side views in closing and opening of the louver blade member and drive member according to the present invention.

6 is a configuration diagram of the opening and closing detection device according to the present invention.

7 is a flow chart of the opening and closing detection method according to the present invention.

FIG. 8 is an exemplary graph for calculating the recontact time T of FIG. 7.

9a and 9b is another embodiment of the opening and closing detection apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: building exterior wall 4: exterior frame

6: inner frame 7a: suction area                 

7b: discharge area 8: louver blade

10: outdoor unit 20: compressor

30: condenser 40: cooling fan

50: control box 70, 71, 72, 73: lever

74: rotary link 82: connector

81: drive source 90: microcomputer

The present invention relates to an open / close detection apparatus and method for an outdoor unit louver blade, and more particularly, to an open / close detection apparatus and method for an outdoor unit louver blade to easily detect the opening and closing of the louver blade using a limit switch.

Air conditioners including both air conditioners or heaters can be divided into one-piece and separate types. In the case of describing the air conditioner as an example, the separate type air conditioner, which is the object of the present invention, is installed indoors to cool the room, and is connected to the indoor unit and the refrigerant pipe, and is installed in the outdoor contact with the air to provide external air to the cooling medium. It consists of an outdoor unit that supplies the condensed refrigerant after condensation heat exchange with the refrigerant gas in the condenser to the evaporator of the indoor unit through the refrigerant pipe. The indoor unit includes an evaporator for cooling heat exchange to absorb evaporative heat from the indoor air by evaporating the refrigerant, and a ventilation fan for circulating the indoor air. An air-cooled condenser for condensing, and a cooling fan for cooling and condensing the refrigerant gas by forcibly blowing external air to the air-cooled condenser. The compressor, air-cooled condenser and cooling fan of the outdoor unit are housed inside the outdoor unit casing that forms the exterior. The conventional hexahedral outdoor unit casing has an air inlet for sucking air into an air-cooled condenser on three sides, and an air for discharging air absorbed from the refrigerant gas to the outside through heat exchange in an air-cooled condenser on its upper surface to the outside The discharge part is provided.

However, such a conventional outdoor unit for an air conditioner has been restricted in the installation place due to the high density of the city and the strengthening of environmental management, and has been subjected to complaints of the surroundings due to noise and heat emission. In particular, common residential facilities, such as large apartment complexes, require outdoor units to be installed inside the veranda due to aesthetics and noise problems.

In order to solve this problem, Japanese Patent Laid-Open Publication No. Hei 6-101873 is installed indoors of an air conditioner or adjacent to an indoor unit, and an outdoor unit of an air conditioner is installed outdoors. In the installed air conditioner-mounted building, an opening is installed in the outer wall or roof, a louver is installed in the opening, an outdoor unit of the air conditioner is installed inside the louver, and the intake or exhaust of the outdoor unit is a wing plate of the louver. Disclosed is a building equipped with an air conditioner, which is to be carried out through a gap.

In addition, Japanese Patent Laid-Open No. 3-213928 discloses an outdoor unit main body for an air conditioner having an outline having a thickness approximately the same as the wall embedded in the wall, and air for heat exchange disposed on the same side of the outdoor unit main body. An outdoor unit for a wall-mounted air conditioner having a suction port and a blowout port of air after heat exchange is disclosed.

1 is a cross-sectional view of a louver according to the prior art. As shown in FIG. 1, the louver part 1 is divided into a suction area 7a and a discharge area 7b on a rectangular inner wall of a rectangular space formed on the outer wall 2 of a residential and / or commercial building. In the region, a plurality of louver blades 8 having the same length protruding to the outside are provided.

The suction area 7a of the louver part 1 is in contact with the suction part 11a of the outdoor unit, and the discharge area 7b of the louver part 1 is in contact with the discharge part 11b of the outdoor unit. That is, air is sucked through the gap between the louver blades 8 in the suction area 7a of the louver part 1 and supplied to the suction part 11a of the outdoor unit. Is discharged from the discharge section 11b of the louver blade 1 through the gap between the louver blades 8 of the discharge region 7b of the louver section 1.

The outdoor unit according to the related art does not present an apparatus and a method for confirming whether the louver 1 is opened or closed. Therefore, when the louver unit 1 does not operate normally due to a problem such as a failure, the suction of the outside air to the intake unit 11a of the outdoor unit is not smooth, and the outside air to the discharge unit 11b of the outdoor unit is also prevented. The discharge is also not smooth. As a result, there arises a problem that the air conditioning performance of the outdoor unit is sharply lowered. Since the deterioration of the outdoor unit performance is not made smoothly heat exchange of the refrigerant, it also affects the performance of the indoor unit.

Accordingly, an object of the present invention is to provide an open / close detection device and a method of an outdoor unit louver blade capable of confirming whether the louver blade is opened or closed.

In addition, an object of the present invention is to provide an opening and closing detection device and method of the louver blades for the outdoor unit that can determine whether the louver blade is normally opened.

In addition, an object of the present invention is to provide an open / close detection apparatus and method for an outdoor unit louver blade for reporting to the indoor unit to display the operating state of the louver blade of the present invention.

The opening and closing detection device of the outdoor unit louver blade according to the present invention includes a louver blade member including a plurality of louver blades, a driving member acting on the louver blade member to open and close the louver blades, and a first contact point when the louver blades are closed. The first and second detection sensors to generate a second contact signal when the louver blades are opened, and the first contact signal from the first and / or second detection sensors to control the drive member. And / or a microcomputer that receives the second contact signal to determine whether the louver blades are opened or closed.

At this time, the louver blade member is connected to the louver blades each having a pair of connecting protrusions formed at both ends and the connecting protrusions of the louver blades formed at the same position, but are rotatably connected to the first to fourth levers. Is done.

In addition, the driving member opens and closes the louver blades by moving the first to fourth levers by a predetermined distance in a direction perpendicular to the louver blades, respectively.                     

In addition, the first to fourth levers have a plurality of openings such that the connecting projections of the louver blades penetrate the inside thereof, and the louver blade member has a plurality of openings of the same louver blade passing through the openings of the first to fourth levers. It is preferable to further include a rotary link connecting the connecting projection to each other.

In addition, the driving member is connected to at least one link of the rotary link to move the two levers connected at one end of the louver blade by the predetermined distance in different directions.

In addition, the drive member includes a drive source for performing a linear motion parallel to the first to fourth lever, and a connector connected to the one rotary link to convert the linear motion of the drive source into a rotary motion of the rotary link. .

The first detection sensor may be contacted by one side of at least one lever of the first to fourth levers, and the second detection sensor may be positioned to be contacted by the other side of the one lever.

In addition, one of the rotary links of the rotary link includes an elongated projection, the first and second detection sensor is preferably positioned to be contacted by the projection by the opening and closing operation of the louver blades.

In addition, the micom is connected to the indoor unit, when receiving the operation signal from the indoor unit, it determines whether the louver blades open or closed.

In addition, the microcomputer determines whether the louver blades are opened or closed according to whether the first contact signal is received.                     

In addition, the micom operates the driving member to open the louver blades according to whether the louver blades are opened or closed. In addition, the micom checks whether the second contact signal is received within the standard recontact time after the first detection sensor is turned off, and determines whether the louver blade has normally opened.

In addition, the microcomputer reports the operating state of the louver blade to the indoor unit according to the determination.

Further, the detection sensors are limit switches.

In addition, the open and close detection method of the louver blade for an outdoor unit according to the present invention includes a plurality of louver blades and a first contact signal generating a first contact signal when the louver blades are closed and a second contact signal when the louver blades are opened. An open / close detection device of an outdoor unit louver blade comprising a second limit switch, comprising: determining whether or not the louver blades are opened or closed according to whether a first contact signal is received, opening the louver blade according to the determination; And determining whether the louver blades are normally opened by checking whether the second contact signal is received within a standard recontact time after the first limit switch is turned off.

In addition, the step of determining whether the opening and closing is preferably performed after receiving the operation signal from the indoor unit.

The method may further include transmitting an operating state to the indoor unit according to the determination of whether the louver blades are normally opened.

Hereinafter, the present invention will be described in more detail with reference to an embodiment of the present invention and the accompanying drawings, the opening and closing detection device and method of the outdoor unit louver blade. However, the scope of the present invention is not limited by the following examples and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

2 to 3 show an embodiment of the wall-mounted outdoor unit for an air conditioner installed with the opening and closing detection device and method of the louver blade according to the present invention.

2 and 3, an outer frame 4 is fixedly installed on a rectangular inner wall of a space formed in the outer wall 2 of a residential and / or commercial building, and an inner frame (inside the outer frame 4) 6) is fixed to the outer frame 4. In some cases, the inner and outer frames 4 and 6 may be integrally formed. The inner region of the inner frame 6 is divided into a suction region 7a and a discharge region 7b, and a plurality of louver blades 8 are provided in each region to fill the gap between these louver blades 8. Air is sucked in or discharged through it.

The detailed structure of this louver blade 8 is disclosed in detail below.

On the other hand, the outdoor unit 10 (only part of which is shown) fixedly installed inside the building exterior wall 2 so as to contact the outer frame 4 and / or the inner frame 6 has an outdoor unit casing. The outdoor unit casing is open at one side facing the suction area 7a and the discharge area 7b of the inner frame 6, and the open side part is divided into the suction part 11a and the discharge part 11b. It corresponds to the suction area 7a and the discharge area 7b of the inner frame.

On the other hand, the outdoor unit 10 fixedly installed inside the building outer wall 2 so as to contact the outer frame 4 and / or the inner frame 6 has an outdoor unit casing.

First, one side of the outdoor unit casing 10 facing the suction area 7a and the discharge area 7b of the inner frame 6 is opened, and the open side part is the suction part 11a and the discharge part 11b. Are separated into a) to correspond to the suction region 7a and the discharge region 7b of the inner frame.

In addition, the outdoor unit suction part 11a is provided with the compressor 20 (not shown) and the air-cooled condenser 30 of a "Ｕ" shape. Air-cooled condenser 30 has a plurality of rows of condenser piping between the many condenser fins has a zigzag shape. The structure and shape of the air-cooled condenser are not shown in detail because they are already known. The compressed refrigerant gas compressed from the compressor 20 flows through the pipe of the condenser 30 and is condensed by taking heat of condensation into air supplied from the outside.

In addition, in the outdoor unit discharge part 11b, a cooling fan 40 which supplies external air to the air-cooled condenser 30 through the suction area 7a and discharges heat-exchanged air through the discharge area 7b is provided. It is fixedly installed. The figure shows a sirocco fan as an example of a cooling fan 40.

In addition, the rear of the outdoor unit is provided with a control box 50 for controlling the operation of the outdoor unit. The control box 50 includes a microcomputer (not shown) that controls the opening and closing of the louver blade 8 and processes a signal from a limit switch (not shown) to be described below. Hereinafter, the microcomputer will be described in detail.

4a and 4b are a perspective view and a partially exploded view of the louver blade member to which the opening and closing detection device according to the present invention is applied. As shown, the louver blade member of the discharge region 7b has the same position in the louver blade 8 and the louver blade 8 in which a pair of connecting projections 8a, 8b, 8c, and 8d are formed at both ends, respectively. First to fourth levers 70, 71, 72, and 73 having a plurality of openings 70a, 71a, 72a, and 73a to penetrate the connecting protrusions 8a, 8b, 8c, and 8d formed therein, respectively. And a rotary link connecting the connection protrusions 8a, 8b, 8c, and 8d of the same louver blade 8 exposed through the first to fourth levers 70, 71, 72, and 73 to each other. 74, 75). The louver blade member of the suction region 7a has the same structure, or it can be modified to operate the entire louver blade 8 of the suction region 7a and the discharge region 7b simultaneously, and this modification It can be easily made in the art to which the invention belongs.

Here, the rotary link (74, 75) may include a pair of openings (74a, 74b), (75a, 75b) so that the connecting projections (8a, 8b), (8c, 8d) is exposed to the outside, However, the connecting projections 8a, 8b and 8c and 8d may also include a pair of grooves (not shown) which are inserted therein but are not exposed to the outside.

In addition, the connector 82 is connected to one rotary link 74 as a motion conversion means for converting a linear motion of a drive source (not shown) into a rotary motion of the rotary link. The connector 82 in which the guide groove 82a is formed, the drive source 81 in which the mover 81a is installed, the first and second limit switches 91 and 92, and the like are described below.

In another embodiment, the first to fourth levers 70, 71, 72, and 73 are not inserted into the connecting projections 8a, 8b, 8c, and 8d of the louver blade 8, but only inserted therein. And grooves (not shown) to allow a connector (not shown), which is a motion conversion means for converting a linear motion of a driving source into a rotational motion of the louver blade, is connected to the louver blade 8. The same action as that of the louver blade member can be performed.

5A and 5B are side views in closing and opening of the louver blade member and drive member according to the present invention.

As shown in Fig. 5A, a connector 82 which is a motion converting means connected to one rotary link 74 of the louver blade member described above with reference to Figs. 4A and 4B, and a guide groove 82a formed in the connector 82; A drive source 81 is shown to linearly move the mover 81a that is movably in contact with (or connected to) the connector 82. Here, the connector 82, the drive source 81, and the mover 81a are called drive members below.

The operation of this drive source 81 is started and stopped by the control of the microcomputer (see FIG. 6) described above.

FIG. 5A shows a case where the drive source 81 contracts the mover 81a into the interior to close the louver blade 8.

In particular, in FIG. 5A, a first contact signal is generated by contacting one end of one of the first to fourth levers 70, 71, 72, and 73 (for example, the first lever 70) to continuously maintain the microcomputer. The first limit switch 91 for transmitting to the second limit switch 92 and the second limit switch 92 for generating a second contact signal in contact with the other end of the first lever 70 and continuously transmitting to the microcomputer are shown. The detailed operation is described in FIG.

In FIG. 5B, the drive source 81 (for example, the drive motor, the hydraulic cylinder, etc.) parallels the mover 81a with the first to fourth levers 70, 71, 72, and 73 by the control from the microcomputer. The linear movement in one direction, the linear mover 81a pushes the connector 82 along the guide groove 82a, the end of the connector 82 is connected to the rotary link 74, so the rotational movement That is, the rotary link 74 is rotated by a predetermined angle (α) around the point (A). The rotational movement of the rotary link 74 causes the rotation of the other rotary links 75 by the first to fourth levers 70, 71, 72, and 73, and is in contact with the first limit switch 91. The first lever 70 moves by a predetermined distance d until it reaches the second limit switch 92. In this case, the fourth lever 73 moves in the same direction as the first lever 70, and the second and third levers 71 and 72 move in the opposite direction to the first lever 71.

In addition, the first lever 70 is in contact with the second limit switch 92, and transmits the second contact signal to the microcomputer.

6 is a configuration diagram of the opening and closing detection device according to the present invention. As shown in FIG. 6, the microcomputer 90 controls the driving member 200 for allowing the louver blade member 100 to perform the opening and closing operation of the louver blade, and the first and second limit switches 91 and 92. Receive a first contact signal and a second contact signal from each. In addition, the microcomputer 90 is connected to the control device of the indoor unit to enable bidirectional communication, and may receive a predetermined control command from the control device of the indoor unit, and report the operating states of the outdoor unit to the control unit of the indoor unit. The microcomputer 90 operates the components of the outdoor unit 10 such as the compressor 20 and the cooling fan 40 to perform the operation as the outdoor unit 10.

7 is a flow chart of the opening and closing detection method according to the present invention. The open / close detection method of FIG. 7 is performed by the open / close detection device and / or another device of FIG. 6.

This open / close detection method includes a step S71 in which a driving signal from the indoor unit (that is, a signal indicating that the indoor unit is powered on to start operation) reaches the microcomputer 90 (S71), and whether the louver blade 8 is opened. Determining step (S72), if the louver blade 8 is open (S73) to drive the outdoor unit 10, and if the louver blade 8 is not opened, the power supply to the drive member 200 (And / or applying the opening command of the louver blade 8) (S74), comparing the recontact time (T) with the standard recontact time (TO) (S75), and if the recontact time ( If T) is less than or equal to the standard recontact time TO, proceed to step S73. If the recontact time T is greater than the standard recontact time TO, the control unit of the indoor unit of the louver blade 8 And sending an operation error message (S76).

In detail, when the microcomputer 90 receives the operation signal from the control device of the indoor unit in step S71, the first and second limit switches 91 and 92 are supplied with power.

In step S72, the microcomputer 90 receives the first contact signal and the second contact signal from the first and second limit switches 91 and 92, respectively. At this time, when the microcomputer 90 receives the first contact signal, it is determined that the louver blade 8 is closed, and the process proceeds to step S74. When the microcomputer 90 receives the second contact signal, the microcomputer 90 proceeds to step S73.                     

In step S73, the microcomputer 90 starts the operation of the outdoor unit 10 by initiating operation of other devices such as the compressor 20 and the cooling fan 40.

In step S74, the microcomputer 90 transmits power to the driving member 200, and the driving member performs an opening operation of the louver blade 8, thereby connecting the first lever connected to the louver blade 8. 70 releases the first limit switch 91 and makes contact with the second limit switch 92 so that the second contact signal is generated and received by the microcomputer 90. In this case, the power transmitted to the driving member 200 may be a reverse power depending on the state and type of the driving source included in the driving member 200.

In step S75, the microcomputer 90 re-contacts time T which is an interval of the time when the second contact signal is received from the time when the first limit switch is turned off (that is, the time when the first contact signal was last received). Calculate). At this time, the microcomputer 90 has already stored the standard recontact time TO (the critical allowable time or maximum allowable time for the louver blade 8 to be converted from the closed state to the open state). If the second contact signal is not received within the standard recontact time TO from the time when the first limit switch 91 is turned off (that is, the recontact time T becomes the standard recontact time TO). Greater than), it is determined that a malfunction has occurred during the opening operation of the louver blade 8, and the flow advances to step S76. In this case, when the second contact signal arrives after the standard recontact time TO from the time when the first limit switch 91 is turned off, and when the second contact signal is not received (that is, the second limit) Switch 92 is not turned on). In this case, a malfunction refers to a problem related to opening and closing of the louver blade 8, such as a case where a large amount of foreign matter or the like accumulates in the louver blade 8 and thus takes a long time or does not open the louver blade 8.

On the other hand, when the micom 90 receives the second contact signal within the standard recontact time TO from the time when the first limit switch 91 is turned off (that is, the recontact time T is the standard recontact time). (Less than or equal to TO), it is determined that the opening operation of the louver blade 8 is normally operated, and the flow advances to step S73.

Finally, in step S76, the microcomputer 90 transfers the operating state (ie, operation error message) of the louver blade 8 to the controller of the indoor unit, which indicates that a malfunction has occurred during the opening operation of the louver blade 8. By transmitting, the user is informed of the operating state of the louver blade 8.

FIG. 8 is an exemplary graph for calculating the recontact time T of FIG. 7. As shown in FIG. 8, a time t1 at which the first limit switch 91 continuously generates and transmits the first contact signal to the microcomputer 90 (ie, the time when the first contact signal is not received). The interval between the time t2 at which the second limit switch 92 is turned on (that is, the time at which the second contact signal is generated and received) becomes the recontact time T.

9a and 9b is another embodiment of the opening and closing detection apparatus according to the present invention.

The opening and closing detection device shown in FIG. 9A includes the same louver blade member shown in FIG. 4, but unlike the first and second limit switches 91 and 92 of the opening and closing detection device of FIG. 4, one rotary link. And a projection 74c formed at one end of the 74, and third and fourth limit switches 93 and 94 contacted by the projection 74c.

The protrusion 74c is brought into contact with the third limit switch 93 to generate a third contact signal. The third contact signal is transmitted to the microcomputer 90 to inform that the louver blade 8 is closed.

In FIG. 9B, when the driving member 200 is operated by the microcomputer 90, the protrusion 74c is rotated as the rotary link 74 rotates about a point B by a predetermined angle β. By contacting the four limit switch 94 to generate a fourth contact signal, the fourth contact signal is transmitted to the microcomputer 90 to inform that the louver blade 8 is open.

9A and 9B are performed in the same manner as the open / close detection apparatus of FIGS. 5A and 5B according to the open / close detection method of FIG. 7.

As described above, the present invention has an effect of enabling the user to quickly check whether the louver blade is opened or closed by a simple limit switch structure.

In addition, the present invention has the effect of confirming whether the louver blade is operated in the open state from the normally closed state.

In addition, by reporting to the indoor unit so that the user can display the operating state of the louver blade of the present invention has an effect that can be notified in advance of the failure or possible failure to the louver blade.

Claims (17)

A louver blade member comprising a plurality of louver blades, A driving member acting on the louver blade member to open and close the louver blades; First and second detection sensors for generating a first contact signal when the louver blades are closed and a second contact signal when the louver blades are opened; A louver connected to an indoor unit and controlling the driving member and receiving at least one of a first contact signal and a second contact signal from the first and second detection sensors after receiving a driving signal from the indoor unit. Opening and closing detection device for a louver blade for an outdoor unit, characterized in that the microcomputer to determine the opening and closing of the blades. According to claim 1, The louver blade member is connected to the louver blades each having a pair of connecting projections formed at both ends, and the connecting projections of the louver blades formed at the same position, the first to rotatably connected to the inside Opening and closing detection device for the outdoor unit louver blades comprising a fourth lever. According to claim 2, The drive member opening and closing the louver blades for the outdoor unit, characterized in that for opening and closing the louver blades by moving the first to fourth levers in a direction perpendicular to the louver blades, respectively, by a predetermined distance. Detection device. The method of claim 3, wherein the first to the fourth lever has a plurality of openings so that the connecting projections of the louver blades penetrate therein, and the louver blade member penetrates through the openings of the first to fourth lever. Opening and closing detection device for an outdoor unit louver blade, characterized in that it further comprises a rotary link connecting the connecting projection of the same louver blade to each other. The outdoor unit of claim 4, wherein the driving member is connected to at least one link of the rotary link to move two levers connected at one end of the louver blade by the predetermined distance in different directions. Opening and closing detection device of louver blade. The method of claim 5, wherein the drive member is a drive source for performing a linear motion parallel to the first to fourth lever, and is connected to the one rotary link to convert the linear motion of the drive source into a rotary motion of the rotary link Opening and closing detection device for a louver blade for an outdoor unit, characterized in that it comprises a connector. The sensor according to any one of claims 2 to 6, wherein the first detection sensor is contacted by one side of at least one lever of the first to fourth levers, and the second detection sensor is connected to one of the levers. Opening and closing detection device for a louver blade for an outdoor unit, characterized in that positioned to be contacted by the other side. 7. The rotary linkage according to any one of claims 2 to 6, wherein one rotary link of the rotary link includes an elongated protrusion, and the first and second detection sensors are moved by the protrusion by opening and closing the louver blades. Opening and closing detection device of the louver blade for an outdoor unit, characterized in that the position to be contacted. delete The apparatus of claim 1, wherein the microcomputer determines whether the louver blades are opened or closed according to whether the first contact signal is received. 11. The apparatus of claim 10, wherein the microcomputer opens the louver blades by operating the driving member according to a determination of whether the louver blades are opened or closed. 12. The apparatus of claim 11, wherein the microcomputer determines whether the louver blade has normally opened by checking whether the second contact signal is received within a standard recontact time after the first detection sensor is turned off. Open / close detection device of louver blade for outdoor unit. The open / close detection device of an outdoor unit louver blade according to claim 12, wherein the microcomputer reports the operating state of the louver blade to the indoor unit according to the determination. The open / close detection device of the louver blade for outdoor unit according to claim 1, wherein the detection sensors are limit switches. Opening and closing of a louver blade for an outdoor unit comprising a plurality of louver blades and first and second limit switches generating a first contact signal when the louver blades are closed and generating a second contact signal when the louver blades are opened. In the detecting apparatus, Determining whether or not the louver blades open and close according to whether the first contact signal is received, Opening the louver blades according to the determination; Determining whether the louver blades are normally opened by checking whether the second contact signal is received within a standard recontact time after the first limit switch is turned off. . The method of claim 15, wherein the determining whether the opening or closing is performed is performed after receiving a driving signal from an indoor unit. The outdoor unit of claim 15, wherein after the determining of the normal opening of the louver blades, the method includes transmitting an operating state according to the determination of whether the louver blades are normally opened to the indoor unit. How to detect the opening and closing of the louver blades.

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