JP2005214562A - Air conditioning indoor unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning indoor unit capable of preventing the failure caused by not only the temporarily generated defective operation but also by the defective operation regularly generated because of deterioration with the lapse of time, and elongating a service life of a product. <P>SOLUTION: In this air conditioning indoor unit 2, detecting parts 80a, 80b detect that whether a front panel 7 is a full-open or full-close state, or not in moving the front panel 7 in starting the operation, and the retrying operation under a condition that pulses are increased, is performed on a panel opening and closing motor 43 applying the driving force to move the front panel 7, in a case when the state free from the full-open or full-close state is detected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioning indoor unit provided with a complicated drive mechanism such as a panel opening / closing mechanism.

Some indoor units of an air conditioner include, for example, a movable panel, a drive mechanism that moves the movable panel, and a drive unit that applies a drive force to the drive mechanism.
A movable panel is a panel which moves, for example, when opening and closing openings, such as a suction inlet and a blower outlet. The driving unit generates a driving force for moving the movable panel. The driving mechanism is a mechanism that moves the movable panel by transmitting the driving force transmitted from the driving unit, and is configured by, for example, a gear or the like.

Since such a drive mechanism is configured by combining a plurality of gears and the like, there is a possibility that a temporary malfunction may occur due to dust contamination, an artificial load, or the like.
In order to solve such a temporary malfunction of the opening / closing mechanism, in the conventional air conditioner indoor unit, when the malfunction of the drive mechanism occurs, the control is performed to perform the retry operation under the same conditions. Adopted.

However, the conventional air-conditioning indoor unit has the following problems.
In other words, in the conventional air conditioner indoor unit, when a malfunction of the drive mechanism occurs, a retry operation is simply performed to re-drive the movable panel under the same conditions. If dust is removed at this time, it can return to normal operation.
However, for example, in a complicated drive mechanism such as a movable suction port panel, the clearance in the gear portion is small, so that the load on the drive system tends to increase due to deterioration over time. For this reason, there is a possibility that malfunction may occur constantly with an increase in load. Therefore, even if a retry operation is performed under the same conditions each time as in a conventional air conditioner indoor unit, it is difficult to move the movable panel to a predetermined position because the load on the drive mechanism is increased. As a result, a permanent malfunction cannot be solved by a simple retry operation. At this time, if the operation is performed in a state where the movable panel remains in a halfway position, for example, during the cooling operation, there is a possibility that the movable panel directly hits the movable panel and causes condensation on the surface of the movable panel. The water generated by the condensation dripped into the room, leading to complaints from users. For this reason, the movable panel cannot be operated with the halfway position, and it has been diagnosed as a failure.

  An object of the present invention is to provide an air-conditioning room capable of extending the product life by avoiding not only a malfunction that occurs temporarily but also a malfunction due to a malfunction that constantly occurs due to deterioration over time, etc. Is to provide a machine.

The air conditioning indoor unit according to claim 1 is a detection source that detects a driving source, a panel opening / closing mechanism that is operated by a driving force transmitted from the driving source, a panel that is moved by the panel opening / closing mechanism, and a moving state of the panel. And a control unit for controlling the operation amount of the drive source transmitted to the panel opening / closing mechanism based on the detection result in the detection unit.
Here, the control unit controls the drive source so as to change the operation amount for transmitting the driving force to the panel opening / closing mechanism based on the detection result in the detection unit that detects the moving state of the panel.

In a conventional air conditioning indoor unit, even when a permanent operation failure due to deterioration over time is detected, a retry operation is performed under the same driving conditions. However, a malfunction due to an increase in load due to deterioration over time or the like cannot be resolved by a retry operation under the same driving conditions, and thus has been diagnosed as a failure.
Therefore, according to the air conditioning indoor unit of the present invention, even when the load on the panel opening / closing mechanism portion increases due to aging deterioration or the like, and the panel opening / closing mechanism becomes difficult to operate, the operation of the panel opening / closing mechanism is completed at the time of retry. It is possible to control to increase the operation amount transmitted from the drive source. Therefore, even in an air-conditioning indoor unit having a complicated mechanism in which a permanent malfunction due to aging is likely to occur, it is possible to avoid the malfunction of the panel opening / closing mechanism. As a result, it is possible to prolong the product life by prolonging the period until a failure is diagnosed.

An air conditioning indoor unit according to a second aspect is the air conditioning indoor unit according to the first aspect, wherein the panel opening / closing mechanism includes a plurality of gear portions that transmit the driving force of the driving source to move the panel. .
Here, the present invention is applied to an air conditioning indoor unit provided with a panel opening / closing mechanism. The panel opening / closing mechanism with a complex configuration with multiple gears has a small clearance in the gears and the load increases due to the deterioration of the gears, etc. over time, and the panel moves to the fully open and fully closed states. It may not be possible. However, according to the air-conditioning indoor unit of the present invention, the above-mentioned problems that occur constantly can be solved by increasing the amount of operation of the drive source before performing a retry operation before determining such a problem as a failure. Thus, it is possible to avoid being judged as a failure.

An air conditioning indoor unit according to a third aspect is the air conditioning indoor unit according to the first or second aspect, wherein the panel opening / closing mechanism is a panel opening / closing mechanism of a movable suction port panel.
In a panel opening / closing mechanism such as a movable suction port panel, since the clearance inside the panel opening / closing mechanism is small, problems such as opening / closing failure due to deterioration over time are likely to occur.
Therefore, according to the air conditioning indoor unit of the present invention, when the detection unit detects that the movable suction inlet panel is not fully opened / closed, the control unit increases the operating amount of the drive source. Control. For this reason, it is possible to eliminate problems such as open / close failures due to aged deterioration that occurs constantly.

An air conditioning indoor unit according to a fourth aspect is the air conditioning indoor unit according to any one of the first to third aspects, wherein the panel opening / closing mechanism is a panel opening / closing mechanism of a movable air outlet panel.
In a panel opening / closing mechanism such as a movable blower outlet panel, since the clearance inside the panel opening / closing mechanism is small, problems such as opening / closing failure due to deterioration over time are likely to occur.
Therefore, according to the air conditioning indoor unit of the present invention, when the detection unit detects that the movable blower outlet panel is not fully opened / closed, the control unit increases the operating amount of the drive source. Control. For this reason, it is possible to avoid the occurrence of problems such as panel opening / closing failure due to aging that occurs constantly.

In particular, in a panel opening / closing mechanism that operates in association with a movable suction port panel and a movable blower outlet panel, a more complicated drive mechanism is required. For this reason, by applying the present invention, it is possible to eliminate the malfunction of the panel opening / closing mechanism that occurs constantly due to aging degradation. Therefore, it is possible to avoid the diagnosis of a failure and extend the product life.
In addition, when the panel opening / closing mechanism is a movable air outlet panel opening / closing mechanism, if the operation amount of the panel closing the air outlet is insufficient, the cool air blown from the air conditioning indoor unit directly hits the panel and the panel is cooled. There is a risk of condensation. According to the air conditioning indoor unit of the present invention, it is possible to avoid a cooling operation or the like without being fully opened, and thus it is possible to reliably prevent the occurrence of condensation on the panel surface.

The air conditioner indoor unit according to claim 5 is the air conditioner indoor unit according to any one of claims 1 to 4, wherein the controller opens and closes the panel when a malfunction of the panel open / close mechanism is detected. Control is performed so that the operation amount of the drive source that transmits the drive force to the mechanism is increased compared to the normal time.
Here, for example, even when a malfunction of the panel opening / closing mechanism such as a temporary stop of the panel opening / closing mechanism or slippage in a gear part of the panel opening / closing mechanism occurs due to aging of the panel opening / closing mechanism, the driving source The amount of operation is controlled to increase. For this reason, it is possible to transmit the driving force larger than that in the normal state to the fully open or fully open state with respect to the panel open and close mechanism having a large load when the panel is opened and closed. Therefore, it is possible to avoid malfunctioning due to aging deterioration being diagnosed as a failure.

An air conditioning indoor unit according to a sixth aspect is the air conditioning indoor unit according to any one of the first to fifth aspects, wherein the control unit includes a storage unit that stores the operating amount of the changed drive source. ing.
Here, since the storage unit stores the previous operation amount (pulse or the like) of the drive source, this operation amount can be used for the control during the next operation. Therefore, it is possible to control the operation amount of the drive source to be increased without waiting for the result of the detection result in the detection unit for an operation failure that constantly occurs such as aged deterioration.

Further, when a malfunction of the panel opening / closing mechanism is detected as a result of the retry operation under the condition that the operation amount is increased, the operation amount is set to be larger than the operation amount stored in the storage unit. The drive source can be controlled automatically.
The air conditioning indoor unit according to claim 7 is the air conditioning indoor unit according to any one of claims 1 to 6, wherein the control unit is based on a detection result in the detection unit each time operation is started. The operation amount of the drive source for the panel opening / closing mechanism is controlled.

  Here, the operation amount of the drive source for the panel opening / closing mechanism is controlled based on the detection result in the detection unit every time the operation is started. For this reason, in the case where a temporary failure due to contamination of a drive unit or human load has occurred in the previous time, instead of a failure that constantly occurs like an operation failure due to deterioration over time. The appropriate action can be taken by returning the drive source to the normal operating amount.

The air conditioning indoor unit according to claim 8 is the air conditioning indoor unit according to any one of claims 1 to 7, wherein the drive source is a stepping motor.
Here, by using a stepping motor that easily adjusts the operation amount of the drive source for the panel opening / closing mechanism, the operation amount of the drive source for the panel opening / closing mechanism can be easily adjusted by increasing or decreasing the pulses.

The air conditioning indoor unit according to claim 9 is the air conditioning indoor unit according to any one of claims 1 to 8, wherein the control unit increases or decreases a pulse to be applied to the drive source based on a detection result in the detection unit. To do.
Here, for example, the operation amount of the drive source given to the panel opening / closing mechanism can be easily changed by changing the pulse given to the stepping motor.

The air conditioning indoor unit according to claim 10 is the air conditioning indoor unit according to claim 9, wherein the control unit is constantly based on the detection result detected by the detection unit and the number of pulses given to the drive source. It is determined whether or not there is a general malfunction.
Here, the control unit can detect whether or not the detected malfunction is a permanent malfunction due to aged deterioration that cannot be completely cured by a simple retry operation. Thereby, when it is diagnosed as a permanent malfunction, it is possible to control the control unit so that the number of pulses at the previous operation is given to the drive source from the beginning after the start of the next operation.

An air conditioning indoor unit according to an eleventh aspect is the air conditioning indoor unit according to any one of the first to tenth aspects, wherein the detection unit includes a limit switch.
Here, a limit switch is used as a detection unit for detecting the fully open state and the fully closed state of the panel moved by the panel opening / closing mechanism. For this reason, when an abnormality that does not cause the panel to be fully opened or fully closed occurs, it can be easily detected as an operation failure.

According to the air conditioning indoor unit of the first aspect, even if the air conditioning indoor unit has a complicated mechanism in which a permanent malfunction due to aging is likely to occur, the panel opening / closing mechanism malfunctions. By avoiding this, it is possible to prolong the product life by prolonging the period until a failure is diagnosed.
According to the air-conditioning indoor unit of the second aspect, it is possible to eliminate a problem that occurs constantly and avoid being determined as a failure.

According to the air-conditioning indoor unit of the third aspect, it is possible to solve problems such as an opening / closing failure caused by aged deterioration that occurs constantly.
According to the air conditioning indoor unit of claim 4, since it is possible to avoid the occurrence of problems such as panel opening and closing failure due to aged deterioration that occurs constantly, avoid being diagnosed as a failure, Product life can be extended.

According to the air conditioning indoor unit of the fifth aspect, it is possible to transmit the driving force larger than that in the normal state to the fully open or fully opened state to the panel opening and closing mechanism in which the load at the time of opening and closing the panel is large. it can.
According to the air conditioning indoor unit of the sixth aspect, since the storage unit stores the previous operation amount of the drive source, the operation amount can be used for control at the next operation.

According to the air conditioner indoor unit of the seventh aspect, when a temporary failure due to contamination of a drive unit or a human load has occurred by accident last time, the drive source is set to a normal operation amount. By returning to, appropriate action can be taken.
According to the air conditioning indoor unit of the eighth aspect, the operation amount of the drive source for the panel opening / closing mechanism can be adjusted by increasing or decreasing the pulse.

According to the air conditioning indoor unit of the ninth aspect, the operation amount of the drive source given to the panel opening / closing mechanism can be easily changed.
According to the air conditioning indoor unit according to claim 10, when it is diagnosed as a permanent malfunction, the control unit determines the number of pulses at the time of the previous operation from the beginning with respect to the drive source after the start of the next operation. Can be controlled to give.

  According to the air conditioning indoor unit of the eleventh aspect, when an abnormality that does not cause the panel to be fully opened or fully closed occurs, it can be easily detected as an operation failure.

[Configuration of the entire air conditioner]
It will be as follows if the air conditioner 1 provided with the indoor unit (air-conditioning indoor unit) 2 which concerns on one Embodiment of this invention is demonstrated using FIGS. 1-11 (b).
The air conditioner 1 is a device for supplying conditioned air into a room, and is installed outside a substantially rectangular parallelepiped indoor unit 2 attached to an indoor wall surface or the like, as shown in FIG. The outdoor unit 3 is provided.

The indoor unit 2 accommodates an indoor heat exchanger 20 described later, and the outdoor unit 3 accommodates an outdoor heat exchanger 30 also described later. Moreover, the refrigerant circuit shown in FIG. 2 is comprised by connecting each heat exchanger 20 and 30 by the refrigerant | coolant piping 4 shown in FIG.
[Schematic configuration of refrigerant circuit of air conditioner]
The outline of the refrigerant circuit which the air conditioner 1 of this embodiment has is shown in FIG.

The air conditioner 1 includes an indoor unit 2 attached to an indoor wall surface and the like, and an outdoor unit 3 installed outside the room.
The refrigerant circuit of the air conditioner 1 mainly includes an indoor heat exchanger 20, an accumulator 31, a compressor 32, a four-way switching valve 33, an outdoor heat exchanger 30, and an electric expansion valve 34.
The indoor heat exchanger 20 provided in the indoor unit 2 performs heat exchange with the air that comes into contact therewith. The indoor unit 2 is also provided with an indoor fan 21 for sucking indoor air and passing the air through the indoor heat exchanger 20 to discharge the air into the room. The indoor fan 21 is rotationally driven by an indoor fan motor 22 provided in the indoor unit 2. The configuration of the indoor unit 2 will be described in detail later.

  The outdoor unit 3 is connected to a compressor 32, a four-way switching valve 33 connected to the discharge side of the compressor 32, an accumulator 31 connected to the suction side of the compressor 32, and a four-way switching valve 33. An outdoor heat exchanger 30 and an electric expansion valve 34 connected to the outdoor heat exchanger 30 are provided. The electric expansion valve 34 is connected to the pipe 23 via the liquid closing valve 36, and is connected to one end of the indoor heat exchanger 20 via the pipe 23. The four-way switching valve 33 is connected to the pipe 24 via the gas closing valve 37, and is connected to the other end of the indoor heat exchanger 20 via the pipe 24. The outdoor unit 3 is provided with an outdoor fan 38 for discharging the air after heat exchange in the outdoor heat exchanger 30 to the outside. The outdoor fan 38 is rotationally driven by an outdoor fan motor 39.

[Configuration of indoor unit]
FIG. 3 shows an exploded perspective view of the indoor unit 2.
The indoor unit 2 is a wall-mounted indoor unit provided on the side wall of the room, and mainly includes a main body 4, an outlet assembly 5, a front grill assembly 6, and a front panel 7.
[Main unit]
The main body 4 includes an indoor heat exchanger 20, an indoor fan 21 (see FIG. 2), an indoor fan motor 22 (see FIG. 2), an electrical component box 40, a drive device 41 (see FIG. 5), and a main body casing.

<Indoor heat exchanger, indoor fan, indoor fan motor, electrical component box>
The indoor heat exchanger 20, the indoor fan 21, and the indoor fan motor 22 are attached to the main body casing 42. As shown in FIG. 4B, the indoor heat exchanger 20 and the indoor fan 21 have an inverted V-shaped shape in which the indoor fan 21 is disposed at the center of the indoor unit 2 in a side view. 20 is arranged so as to surround the upper half of the indoor fan 21. The indoor fan motor 22 (not shown) is disposed on the right side of the indoor fan 21 in a front view. FIG. 4B is a side sectional view of the indoor unit 2.

  As shown in FIG. 3, the electrical component box 40 is attached to the main body casing 42 and is disposed on the right side of the indoor heat exchanger 20, the indoor fan 21, and the indoor fan motor 22 in a front view. The electrical component box 40 houses a control board, and the control board functions as a control unit that controls each component necessary for the air conditioning operation of the indoor unit 2. The control unit will be described in detail later.

<Driver>
As shown in FIG. 5, the driving machine 41 is disposed in the vicinity of the left end of the main body casing 42 and generates a driving force for moving the front panel 7. As shown in FIG. 6, the drive machine 41 includes a panel opening / closing motor (drive source) 43, a first drive machine gear (gear part) 44, a second drive machine gear (gear part) 45, and a drive machine casing 46. ing.

The panel opening / closing motor 43 is, for example, a stepping motor, and is a driving source that generates a driving force for moving the front panel 7. Further, the panel opening / closing motor 43 is connected to the control unit 8 housed in the electrical component box 40 by a cable 430.
The first drive gear 44 transmits the rotation of the panel opening / closing motor 43 to the second drive gear 45.

  A part of the second drive gear 45 is exposed from the drive casing 46, and a power transmission gear 66 (see FIG. 7) of the opening / closing mechanism 61 in a state where the front grill 60 is attached to the main casing 42. It is arranged so as to mesh. Therefore, by attaching the front grill 60 to the main body 4 and fixing the driving machine 41 to a fixing part 62 (see FIG. 5) described later, the second driving machine gear 45 and the power transmission gear 66 are easily meshed. be able to. The second driving machine gear 45 transmits the rotation of the panel opening / closing motor 43 to the power transmission gear 66 via the first driving machine gear 44 and transmits the driving force of the panel opening / closing motor 43 to the opening / closing mechanism 61.

As shown in FIG. 6, the drive machine casing 46 accommodates a panel opening / closing motor 43, a first drive machine gear 44, and a second drive machine gear 45. The driving machine casing 46 includes a locking hole 461 and a fixed portion 462.
The locking hole 461 is an opening provided in the driving machine casing 46, and the locking claw 490 of the main body casing 42 shown in FIG. Two locking holes 461 are provided in the driving machine casing 46, and each is formed larger than the size of the locking claw 490. For this reason, in a state in which the locking claw 490 is inserted into the locking hole 461, the driving device 41 is not fixed so as not to be moved but is temporarily fixed so as to be slightly movable. Therefore, the positioning of the drive device 41 can be easily performed during the main fixing performed after the temporary fixing.

  The fixed portion 462 is a portion fixed to the fixing portion 62 of the front grill 60 and has a screw hole. The fixed portion 462 is screwed to a fixing portion 62 provided on the front grill 60. Unlike the temporary fixing by the locking hole 461 and the locking claw 490, the fixing by the fixed portion 462 and the fixing portion 62 is a fixing that securely fixes the driving device 41 to the front grill 60 so that the driving device 41 does not move. is there.

<Main body casing>
The main body casing 42 is provided with an indoor heat exchanger 20, an indoor fan 21, an indoor fan motor 22, an electrical component box 40, and a drive machine 41. The indoor heat exchanger 20, the indoor fan 21, the indoor fan motor 22, and the electrical component box 40 are fixed to the main body casing 42, and the driving machine 41 is temporarily fixed. The main body casing 42 is molded from a resin material and has a shape that covers the lower side, the rear side, and the left side of the indoor fan 21. As shown in FIG. 5, the main body casing 42 has an indoor fan housing portion 47, a back surface portion 48, and a left side portion 49. In FIG. 5, the illustration of the indoor heat exchanger 20 and the indoor fan 21 is omitted for convenience of explanation.

  The indoor fan accommodating portion 47 is a portion that accommodates the indoor fan 21 and the indoor fan motor 22, and supports the indoor heat exchanger 20 attached from above the indoor fan 21. The indoor fan motor 22 disposed on the right side of the indoor fan 21 is fixed near the right end of the indoor fan housing portion 47, and the electrical component box 40 is fixed on the right side thereof (see FIG. 3). The lower part of the indoor fan accommodating portion 47 is a portion to which the air outlet assembly 5 is fixed, and an opening that communicates with the space in which the indoor fan 21 is accommodated is provided (not shown). By attaching the outlet assembly 5 to the lower part of the indoor fan accommodating portion 47, the space in which the indoor fan 21 of the indoor fan accommodating portion 47 is accommodated communicates with the outlet 26 (see FIG. 4B). .

The back surface portion 48 covers the back of the indoor fan 21 and the indoor heat exchanger 20 and closes the back surface side of the indoor unit 2.
The left side portion 49 is a portion to which the drive machine 41 is temporarily fixed. The left side portion 49 is provided in the vicinity of the left end of the indoor fan accommodating portion 47 and is disposed so as to face the left end of the indoor fan 21 and the indoor heat exchanger 20 attached to the indoor fan accommodating portion 47. A locking claw 490 for temporarily fixing the drive machine 41 is provided on the left side surface of the left side portion 49. The locking claws 490 are provided at two locations corresponding to the locking holes 461 and protrude from the left side surface of the left side portion 49 to the left side, that is, the side of the left side portion 49 opposite to the indoor fan 21 side. . The locking claw 490 temporarily fixes the drive unit 41 to the main body casing 42 before the front grill 60 is attached to the main body casing 42. As described above, the locking hole 461 of the driving machine 41 into which the locking claw 490 is inserted is formed larger than the locking claw 490. Accordingly, the driving machine 41 temporarily fixed by the locking claw 490 and the locking hole 461 is temporarily fixed so as to be slightly movable. The locking claw 490 is provided on the front grill 60 described later. When being fixed by the fixing portion 62, the driving device 41 is temporarily fixed so that the driving device 41 can move to a position fixed by the fixing portion 62.

[Air outlet assembly]
As shown in FIG. 3, the blowout port assembly 5 is attached to the main body portion 4 to form a blowout port 26 (see FIG. 4B). The air outlet 26 constituted by the air outlet assembly 5 is an opening through which the air blown into the room through the indoor heat exchanger 20 by the indoor fan 21 passes. The outlet 26 has a shape that is long in the horizontal direction when viewed from the front. The outlet 26 is provided near the lower part of the indoor unit 2 and on the front surface of the indoor unit 2. When the operation of the indoor unit 2 is stopped, the outlet 26 is closed by a first panel 71 of the front panel 7 described later.

  The outlet assembly 5 has a horizontal flap 50 and a flap motor 51 (see FIG. 5). The horizontal flap 50 has a plate-like shape that is long in the longitudinal direction of the indoor unit 2, and adjusts the direction in which air is blown from the blowout port 26. The horizontal flap 50 has a rotation axis parallel to the longitudinal direction of the indoor unit 2, and is driven by a flap motor 51 to rotate around the rotation axis, thereby changing the air blowing direction. Moreover, the horizontal flap 50 comprises the bottom face of the indoor unit 2 parallel to a horizontal surface by moving so that it may become parallel to a horizontal surface.

[Front grille assembly]
As shown in FIG. 3, the front grille assembly 6 is attached to the main body 4 from the front and covers the front and side surfaces of the main body 4. The front grille assembly 6 has a front grille 60 and an opening / closing mechanism 61.
<Front grille>
The front grill 60 is molded from a resin material and has a thin, substantially rectangular parallelepiped shape with the entire back surface opened. The front grill 60 has a substantially rectangular shape that is long in the horizontal direction when viewed from the front, and a substantially rectangular cross-sectional shape that is long in the vertical direction when viewed from the side. The front grill 60 is attached to the main body 4 so as to cover the front, left and right sides, upper and lower sides of the main body 4. Further, the front grill 60 is provided with a suction portion 25 and a blowout portion 29.

  The suction portion 25 is provided with an opening through which air taken into the interior of the indoor unit 2 from the room by the indoor fan 21 is provided, and has a first suction port 27 and a second suction port 28. The first suction port 27 is provided from near the center of the front surface of the front grill 60 to the upper portion, and faces the front side of the indoor heat exchanger 20. The first suction port 27 is closed by a second panel 72 of the front panel 7 described later when the operation of the indoor unit 2 is stopped. The second suction port 28 is configured by a plurality of slits that are long in the longitudinal direction of the front grill 60, and is provided on the top surface of the front grill 60.

The blowout part 29 is an opening provided in the lower part of the front grill 60 and constitutes the blowout opening 26 together with the blowout opening assembly 5. The blowing part 29 is closed by a first panel 71 of the front panel 7 described later.
Further, as shown in FIG. 5, a fixing portion 62 is provided on the front surface of the front grill 60. The fixing part 62 is a part to which the fixed part 462 of the temporarily fixed drive machine 41 is fixed, and has a screw hole. The screw hole is provided in the vicinity of the left end of the front surface of the front grill 60, and is provided at a position substantially opposite to the screw hole of the fixed portion 462 of the drive machine 41 temporarily fixed to the main body portion 4. However, in the temporary fixing stage, the screw hole of the fixed part 462 and the screw hole of the fixing part 62 do not have to coincide completely, and the final fixing stage for fixing the fixed part 462 and the fixing part 62 to each other. Thus, the temporarily fixed driving machine 41 may be moved so that the screw hole of the fixed portion 462 and the screw hole of the fixing portion 62 are aligned. The fixed portion 62 and the fixed portion 462 are fixed by passing a screw through the screw hole of the fixed portion 462 and the screw hole of the fixed portion 62.

  In the vicinity of both side ends of the front surface of the front grill 60, slits 600 to 603 extending in the vertical direction are provided. The slits 600 to 603 are divided into upper and lower parts and are provided at four places in total, two places on each of the left and right sides. From the slits 600 to 603, a part of a first panel support member 67 and a second panel support member 68 described later protrude, and the first panel 71 and the second panel 72 of the front panel 7 are connected to the first panel. The support member 67 and the second panel support member 68 are respectively fixed to a part.

<Opening / closing mechanism>
An opening / closing mechanism (panel opening / closing mechanism) 61 shown in FIG. 3 is a mechanism for moving the front panel 7 by the driving force of the driving device 41 to open and close the first suction port 27 and the outlet 26. The opening / closing mechanism 61 is composed of a plurality of members having gear portions, and transmits the driving force of the driving machine 41 to the first panel (movable air outlet panel) 71 and the second panel (movable air inlet panel) 72. It functions as a speed reduction mechanism. The opening / closing mechanism 61 functions as a conversion mechanism that converts the rotational motion transmitted from the drive machine 41 into the opening / closing operations of the first panel 71 and the second panel 72. As shown in FIG. 7, the opening / closing mechanism 61 is provided on the back surface of the front grill 60, and includes a first opening / closing mechanism 63, a second opening / closing mechanism 64, and a power transmission shaft 65.

  The first opening / closing mechanism 63 is attached to the rear surface of the left side surface of the front panel 7 and supports the vicinity of the left end of the first panel 71 and the vicinity of the left end of the second panel 72 described later. Note that “left and right” here means “left and right” in the front view of the indoor unit 2, and FIG. 7 is a view of the front grill 60 viewed from the back side. The left and right are reversed. The first opening / closing mechanism 63 transmits the driving force of the driving device 41 to the vicinity of the left end of the first panel 71 and the vicinity of the left end of the second panel 72 when the first panel 71 and the second panel 72 are opened and closed. An opening / closing operation is performed by moving the vicinity of the left end of 71 and the vicinity of the left end of the second panel 72.

  The second opening / closing mechanism 64 is attached to the back surface of the right side surface of the front panel 7 and supports the vicinity of the right end of the first panel 71 and the vicinity of the right end of the second panel 72 described later. The second opening / closing mechanism 64 transmits the driving force of the driving device 41 to the vicinity of the right end of the first panel 71 and the vicinity of the right end of the second panel 72 when the first panel 71 and the second panel 72 are opened and closed. An opening / closing operation is performed by moving the vicinity of the right end of the first panel 71 and the vicinity of the right end of the second panel 72.

  The power transmission shaft 65 is a member that distributes and transmits the driving force of the drive unit 41 to the first opening / closing mechanism 63 and the second opening / closing mechanism 64, and is disposed on the back surface of the front surface of the first front grill 60 on the indoor unit 2. It is attached so as to be rotatable about an axis parallel to the longitudinal direction. Both ends of the power transmission shaft 65 are connected to the first opening / closing mechanism 63 and the second opening / closing mechanism 64, respectively, and a power transmission gear 66 is provided therebetween. The power transmission gear 66 is provided in the vicinity of the first opening / closing mechanism 63, and is disposed so as to mesh with the second driving machine gear 45 of the driving machine 41 with the front grill 60 attached to the main body 4. Yes. In this manner, the opening / closing mechanism 61 is configured to distribute the driving force from the drive machine 41 to the first opening / closing mechanism 63 and the second opening / closing mechanism 64 by the power transmission shaft 65.

Hereinafter, the configuration of the first opening / closing mechanism 63 will be described in detail, but the second opening / closing mechanism 64 has a similar structure that is symmetrical to the first opening / closing mechanism 63.
As shown in FIG. 8, the first opening / closing mechanism 63 includes a first opening / closing gear (gear part) 630, a second opening / closing gear (gear part) 631, a first panel support member 67, and a second panel support member 68. ing. The first opening / closing mechanism 63 has a first opening / closing mechanism casing 69 that accommodates these gears and members, and is unitized.

The first opening / closing gear 630 is fixed to one end of the power transmission shaft 65, and transmits the driving force from the driving machine 41 transmitted via the power transmission shaft 65 to the second opening / closing gear 631.
The second opening / closing gear 631 meshes with the first opening / closing gear 630, the first gear portion 670 of the first panel support member 67, and the second gear portion 680 of the second panel support member 68, and is transmitted from the first opening / closing gear 630. The driving force to be transmitted is transmitted to the first panel support member 67 and the second panel support member 68, respectively.

  The first panel support member 67 is a flat plate-like member that is attached to the first panel 71 and supports the first panel 71. The first panel support member 67 is provided so as to be movable in the vertical direction, and can move the first panel 71 linearly in the vertical direction. The first panel support member 67 includes a linear portion 671 having a linear shape extending in parallel with the vertical direction, and a curved portion 672 that curves from the lower portion of the linear portion 671 toward the front of the indoor unit 2. And the front-end | tip of the curved part 672 protrudes ahead of the front grill 60 through the slit 601 provided in the front surface of the front grill 60 (refer FIG. 5). The vicinity of the left end of the first panel 71 is fixed to the tip of the curved portion 672. In addition, a first gear portion 670 is provided in the linear portion 671. The first gear portion 670 is a rack gear extending in the vertical direction, and converts the rotational movement of the second opening / closing gear 631 into a linear movement in the vertical direction. Thereby, the rotational motion of the drive machine 41 is converted into the linear motion of the first panel 71 in the vertical direction.

  The second panel support member 68 is a flat plate-like member to which the second panel 72 is attached and supported. The second panel support member 68 is provided to be movable in the front-rear direction, and can move the second panel 72 in the front-rear direction. Specifically, the second panel support member 68 moves in the front-rear direction while drawing a gentle arc. That is, when the second panel 72 moves forward, the second panel 72 moves so that the upper end of the second panel 72 tilts forward, and when the second panel 72 moves backward, the second panel 72 moves. 72 is moved so that the upper end inclined forward is restored and the second panel 72 is parallel to the vertical direction (see FIGS. 9A to 9C). The second panel support member 68 is integrally molded using a resin material, and has a second gear portion 680 and a plate portion 681.

The second gear portion 680 is provided so as to protrude from the inside of the plate portion 681 and meshes with the second opening / closing gear 631. The second gear portion 680 is a rack gear that extends in the front-rear direction while drawing a gentle arc, converts the rotational movement of the second opening / closing gear 631 into an arc movement, and the second panel 72 attaches the driving force of the driving machine 41. It transmits to the 2nd panel support part 68 made.
The plate portion 681 is provided on the outside (left side) of the first opening / closing gear 630, the second opening / closing gear 631, and the first panel support member 67, and the first opening / closing gear 630, the second opening / closing gear 631 and the first panel. The outside of the support member 67 is covered. The front end of the plate portion 681 protrudes forward through a slit 600 provided on the front surface of the front panel 7, and the vicinity of the left end of the second panel 72 is fixed and supports the vicinity of the left end of the second panel 72. The plate portion 681 moves so as to draw a gentle arc as described above by the driving force of the driving device 41 transmitted to the second gear portion 680. In the opening operation of the second panel 72, the plate portion 681 further protrudes from the slit 600 to the front of the front grill 60, thereby moving the second panel 72 away from the first suction port 27. In particular, in the open state of the second panel 72, the plate portion 681 protrudes greatly from the slit 600 to the front of the front grill 60, and closes the side of the gap between the second panel 72 and the front grill 60 (see FIG. 9). Thereby, the board part 681 can prevent a resident's hand from being inserted from the side of the clearance gap between the 2nd panel 72 and the front grille 60. FIG. In addition, since the plate portion 681 is located outside the second gear portion 680, the first opening / closing gear 630, the second opening / closing gear 631, etc., the resident's hand is able to use the second gear portion 680, the first opening / closing gear 630, the first opening / closing gear 630, etc. 2 The risk of touching the open / close gear 631 and the like can be avoided.

[Front panel]
The front panel 7 covers substantially the entire front surface of the front grill 60 as shown in FIG. The front panel 7 covers the outlet 26 and the first inlet 27 in front view except during operation, and moves during operation to open the outlet 26 and the first inlet 27. The front panel 7 is a panel aggregate in which a plurality of seamless panels are aggregated, and includes a first panel 71, a second panel 72, and a third panel 73.

<First panel>
The first panel (movable air outlet panel) 71 is disposed below the front surface of the front grill 60 so as to be movable so as to open and close the air outlet 26, and is provided so as to cover the air outlet 26. The first panel 71 is supported by the opening / closing mechanism 61 in the vicinity of both left and right ends so as to be movable in the vertical direction, and opens and closes the outlet 26. The first panel 71 is a rectangular flat plate-like member having no seam, and has substantially the same width as the width W of the front grill 60 in front view. The front side of the first panel 71 is formed in a smooth, generally flat shape without openings such as irregularities and holes. The first panel 71 is parallel to the vertical direction as shown in FIGS. 4A and 9A when the outlet 26 is closed. In this state, the first panel 71 has a larger projected area than the outlet 26 in a front view. Accordingly, the first panel 71 completely covers the lower part of the front surface of the front grill 60 including the air outlet 26 when the air outlet 26 is closed. The first panel 71 is formed of a transparent resin mixed with particles having luminance such as pearl particles, and has a transparent resin layer mixed with particles. And the coating layer in which the color, the pattern, etc. were represented was provided in the back side of the transparent resin layer. The paint layer is formed by painting from the back side of the first panel 71. Thus, the 1st panel 71 functions as a design panel which raises the design property of the indoor unit 2 by arrange | positioning in the front surface which has high design property and is easy to touch an occupant's eyes.

<Second panel>
The second panel (movable suction port panel) 72 is disposed above the front surface of the front grill 60 so as to be movable so as to open and close the first suction port 27 and is provided so as to cover the first suction port 27. It is done. The second panel 72 is supported in the vicinity of both left and right ends by an opening / closing mechanism 61 so as to be movable in the front-rear direction. By moving away from the first suction port 27, the first suction port 27 is opened. The first suction port 27 is closed by moving so as to be close to 27. The second panel 72 is a rectangular flat member having no seam, and has substantially the same width as the width W of the front grill 60 including the first suction port 27 in a front view. The front side of the second panel 72 is formed in a smooth, generally flat shape having no openings such as irregularities and holes. When the first suction port 27 is closed, the second panel 72 is in a state parallel to the vertical direction as shown in FIGS. 4 (a) and 9 (a). The second panel 72 has a larger projected area than the first suction port 27 in front view. Therefore, the second panel 72 completely covers the upper half of the front surface of the front grill 60 including the first suction port 27 when the first suction port 27 is closed. Similarly to the first panel 71, the second panel 72 is formed of a transparent resin mixed with particles having luminance such as pearl particles, and has a transparent resin layer mixed with particles. And the coating layer in which the color, the pattern, etc. were represented was provided in the back side of the transparent resin layer. This paint layer is formed by painting from the back side of the second panel 72. Thus, the 2nd panel 72 has a high designability, and functions as a design panel which raises the designability of the indoor unit 2 by being arrange | positioned in the front surface which is easy to touch a resident's eyes.

<Third panel>
The third panel 73 is disposed between the first panel 71 and the second panel 72. The third panel 73 has a rectangular shape having no seam when viewed from the front. The third panel 73 has a width W substantially the same as that of the front grill 60 and has a length substantially the same as that of the first panel 71 in the vertical direction. The front side of the third panel 73 is formed in a smooth, generally flat shape having no openings such as irregularities and holes. As shown in FIG. 9A, the left and right end portions of the third panel 73 are fixed to the left and right side surfaces of the front grill 60, respectively, and the front portion of the third panel 73 is in front of the front grill 60. Are arranged so that there is a gap in the front-rear direction. That is, a gap is formed between the front panel of the third panel 73 and the front grill 60. This gap is formed to be slightly larger than the thickness of the first panel 71 disposed below, and is a space for accommodating the first panel 71 that moves to open the outlet 26. The third panel 73 is molded from an opaque resin material.

  Thus, the first panel 71 completely covers the lower part of the front grill 60 including the outlet 26 in a state where the outlet 26 is closed, and the second panel 72 closes the first inlet 27. In this state, the upper part of the front surface of the front grill 60 including the first suction port 27 is completely covered. The first panel 71, the second panel 72, and the third panel 73 are arranged side by side in an up-down direction, and in a state where the blowout port 26 and the first suction port 27 are closed, a substantially flat rectangular plane is formed. Arranged to compose. The front panel 7 constituted by the first panel 71, the second panel 72, and the third panel 73 covers substantially the entire front surface of the indoor unit 2 in a state where the blowout port 26 and the first suction port 27 are closed. Only the seam formed at the boundary between the first panel 71, the second panel 72, and the third panel 73 appears in front view. That is, only the joint extending in the horizontal direction formed by the boundary between the first panel 71 and the third panel 73 and the boundary between the second panel 72 and the third panel 73 appears in a front view. Further, the first panel 71, the second panel 72, and the third panel 73 are parallel to the vertical direction, and the front panel 7 is parallel to the vertical direction in a state where the blowout port 26 and the first suction port 27 are closed. A flat surface is formed. In the indoor unit 2 of the air conditioner 1, the front panel 7 has such a flat shape, so that the aesthetic appearance is improved.

[Operation of the front panel at the start of operation]
When the indoor unit 2 is stopped, the front panel 7 is in a state where the outlet 26 and the first inlet 27 are closed as described above. When the indoor unit 2 starts operation, first, the indoor fan 21 is activated at a low speed. Next, the 1st panel 71 and the 2nd panel 72 move, and the blower outlet 26 and the 1st inlet 27 are opened. Thereby, the air volume of the air taken into the indoor unit 2 is secured, and the air is blown out in the horizontal direction. Hereinafter, the operation of the front panel 7 will be described mainly with reference to FIGS. 9A to 9C. 9A to 9C are side views of the indoor unit 2.

  In a state where the indoor unit 2 is not in operation, the first panel 71 and the second panel 72 close the blowout port 26 and the first suction port 27, and as shown in FIG. Panel 71, 2nd panel 72, and 3rd panel 73 are arrange | positioned so that it may align with a substantially straight line in a side view parallel to an up-down direction. The front sides of the first panel 71, the second panel 72, and the third panel 73 are substantially flat. In this state, the first panel support member 67 of the opening / closing mechanism 61 is located at the lowest position in the movable range. Further, the second panel support member 68 is located at the rearmost side of the movable range.

  When the indoor unit 2 starts operation, the panel opening / closing motor 43 of the drive unit 41 is controlled to start rotating. Then, the driving force of the driving machine 41 is transmitted to the power transmission shaft 65, and the driving force is distributed and transmitted to the first opening / closing mechanism 63 and the second opening / closing mechanism 64. Then, the first opening / closing mechanism 63 and the second opening / closing mechanism 64 cause the first panel 71 and the second panel 72 to move, and the blowout port 26 and the first suction port 27 are opened.

  At this time, in the first opening / closing mechanism 63, the driving force is transmitted to the first panel support member 67 via the first opening / closing gear 630 and the second opening / closing gear 631. When the driving force is transmitted from the second opening / closing gear 631 to the first gear portion 670 of the first panel support member 67, the rotational motion is converted into an upward linear motion, and the first panel support member 67 is Move linearly to In the second opening / closing mechanism 64, the driving force of the same driving machine 41 is transmitted and the same operation is performed. As a result, as shown in FIG. 9B, the first panel 71 translates upward and downward to open the outlet 26. When the first panel 71 moves upward in the vertical direction, the upper end of the first panel 71 is inserted into the gap behind the third panel 73. When the first panel 71 moves further upward, the first panel 71 is accommodated in the gap between the third panel 73 and the front grille 60 as shown in FIG. Hidden behind. That is, substantially the entire first panel 71 is in a state where it overlaps the third panel 73.

  Further, the second panel 72 also moves in conjunction with such movement of the first panel 71. At this time, in the first opening / closing mechanism 63, the rotation of the second opening / closing gear 631 is simultaneously transmitted to the second gear portion 680 of the second panel support member 68. When the driving force is transmitted from the second opening / closing gear 631 to the second gear portion 680 of the second panel support member 68, the rotational motion is converted into a gentle arc-shaped motion, and the second panel support member 68 is converted. Moves forward along a gentle arc-shaped trajectory. This arc-shaped locus is such that the second panel support member 68 moves forward and the upper end of the second panel support member 68 is inclined forward. In the second opening / closing mechanism 64, the driving force of the same driving machine 41 is transmitted and the same operation is performed. As a result, the second panel support member 68 protrudes forward from the front surface of the front grill 60. For this reason, as shown in FIG.9 (b), while the 2nd panel 72 moves ahead, it rotates centering on the axis | shaft parallel to the left-right direction in the front view. The second panel 72 rotates so that its upper end is inclined forward, with its lower end near the center. As shown in FIG. 9C, the second panel 72 further moves to form a gap between the front grill 60 and the second panel 72. Thereby, the 1st inlet 27 is opened. Then, air is sucked from the gap between the upper end of the second panel 72 and the front grill 60, and air is sucked into the indoor unit 2 from the first suction port 27. At this time, the side of the gap between the front grill 60 and the second panel 72 is closed by the second panel support member 68, and above the gap between the front grill 60 and the second panel 72. Is open. For this reason, air is mainly sucked in from above the gap between the front grill 60 and the second panel 72.

When the front panel 7 moves and the blowout port 26 and the first suction port 27 are opened, the horizontal flap 50 (see FIG. 3) rotates so as to have a blowout angle corresponding to the set operation mode.
When the operation of the indoor unit 2 is stopped, the panel opening / closing motor 43 of the drive unit 41 is controlled to rotate in the reverse direction, and the first panel support member 67 and the second panel support member 68 are moved in the reverse direction. Moving. As a result, the first panel 71 and the second panel 72 move in the opposite direction, and the front panel 7 returns to a flat state.

[Control when front panel malfunctions]
In the indoor unit 2 of the present embodiment, as described above, the first panel 71 and the second panel 72 are moved from the fully closed state shown in FIG. 9A to the state shown in FIG. It moves to the fully open state shown in 9 (c).
Here, as described above, the opening / closing mechanism 61 that moves the first panel 71 and the second panel 72 from the fully closed state to the fully open state has the gear portions (the first drive gear 44, the second drive gear 45, It has a complicated mechanism constituted by a plurality of members such as a first opening / closing gear 630 and a second opening / closing gear 631). And since this gear part has a complicated configuration, it is configured with a very small clearance. For this reason, structural members such as gears may be worn and deteriorated due to aging, and the load during opening and closing may increase. As a result, the first panel 71 and the second panel 72 cannot move smoothly at the start of operation, at the time of operation stop, at the time of operation switching, and the like, which may cause malfunction.

  In the indoor unit 2 of the present embodiment, when the malfunction of the opening / closing mechanism 61 due to such deterioration over time is detected, the control unit 8 transmits the driving force to the opening / closing mechanism 61. Control is performed so as to increase the number of pulses applied to (see FIGS. 11A and 11B). That is, the control unit 8 controls the panel opening / closing motor 43 so that the operation amount for the opening / closing mechanism 61 transmitted from the panel opening / closing motor 43 is larger than normal.

Here, the malfunction detection control at the start of operation in the indoor unit 2 of the present embodiment is given to the flowchart shown in FIG. 10 and the panel opening / closing motor 43 shown in FIGS. 11 (a) and 11 (b). It will be as follows if it demonstrates using the time chart of a pulse.
First, when the operation is started in step (hereinafter referred to as S) 1, it is detected in S2 whether or not the front panel 7 is fully closed. Here, if the fully closed state is detected, the process proceeds to S5.

  On the other hand, if it is detected in S2 that it is not in the fully closed state, in S3, in order to bring the front panel 7 into the fully closed state, as shown by the dotted line in FIG. After being driven in the direction of the state, the retry operation is performed under the condition that the number of pulses applied to the panel opening / closing motor 43 is increased. Then, in S4, it is detected again whether or not the front panel 7 is in the fully closed state, and if the fully closed state is detected, the process proceeds to S5. ), As indicated by a solid line, an abnormality is diagnosed in S10.

In S5, a process for fully opening the front panel 7 is performed. Subsequently, in S6, it is detected whether or not the front panel 7 is fully opened. If the front panel 7 is fully opened, it is diagnosed as normal in S9.
On the other hand, when it is detected in S6 that the front panel 7 is not fully opened, in order to make the front panel 7 fully open, as shown by a dotted line in FIG. After driving in the direction of the fully closed state once, the retry operation is performed under the condition that the pulse applied to the panel opening / closing motor 43 is increased. Then, in S8, it is detected again whether or not the front panel 7 is in the fully opened state. If the fully opened state is detected, the process proceeds to S5. If the fully opened state is not detected in this case, the process proceeds to S10 in FIG. ), The occurrence of an abnormality is diagnosed as indicated by the solid line.

In addition, as shown in FIG. 8, the detection of the fully open state and the fully closed state of the 1st panel 71 and the 2nd panel 72 detects the 1st panel support member 67 and 2nd which support the 1st panel 71 and the 2nd panel 72. This is performed by the first detection unit 80a and the second detection unit 80b arranged in the vicinity of the panel support member 68.
The first detection unit 80a and the second detection unit 80b are, for example, limit switches, and a protrusion 672a and a second panel support unit formed on the first panel support unit 67 that move when the operation starts or stops. The front end of the front panel 7 is in contact with a part of 68, and the fully open state and the fully closed state of the front panel 7 are detected. Further, the first detection unit 80 a and the second detection unit 80 b transmit this detection result to the control unit 8.

If the load is large because dust or the like has entered the gear portion of the opening / closing mechanism 61 instead of a malfunction that constantly occurs due to aging or the like, the load will be increased if dust is removed from the gear portion. Disappear. For this reason, it is not necessary to control the panel opening / closing motor 43 so as to give an increased pulse at the start of each subsequent operation.
In the indoor unit 2 of the present embodiment, a normal pulse is given to the panel opening / closing motor 43 every time the operation is started. When the first detection unit 80a and the second detection unit 80b cannot move the first panel 71 and the second panel 72 to a predetermined position with a normal pulse and detect a malfunction, control is performed. The unit 8 controls the panel opening / closing motor 43 to apply a pulse larger than a normal pulse.

As a result, even when a malfunction is temporarily detected due to a load applied to the operation of the opening / closing mechanism 61 due to contamination of dust or the like, a normal pulse is sent to the panel opening / closing motor 43 for the subsequent opening / closing operation of the front panel 7. Can be done.
Further, the indoor unit 2 of the present embodiment includes a storage unit 9 inside the control unit 8.
The storage unit 9 stores various data such as a program for controlling the indoor unit 2. Further, the storage unit 9 stores the number of pulses given to the panel opening / closing motor 43 during normal operation and the number of pulses given in multiple stages during the retry operation.

As a result, by using the number of pulses stored in the storage unit 9 during the next operation, the operation failure can be resolved without detecting the operation failure every time for the operation failure of the front panel 7 that occurs constantly. It becomes possible to do.
Further, the control unit 8 determines whether or not the malfunction detected during the previous operation is a permanent one due to the aging deterioration based on the number of pulses given to the panel opening / closing motor 43 at the start of the next operation. Determine whether.

  Specifically, the number of pulses given to the panel opening / closing motor 43 is detected before the fully opened state or the fully closed state under the condition that the pulses given to the panel opening / closing motor 43 are increased. Then, the number of pulses measured here is compared with the number of pulses necessary to reach the fully open state and the fully closed state in the no-load state. If the number of pulses substantially coincides with each other, it is determined that the detected malfunction is temporary. On the other hand, when the detected number of pulses is larger than the number of normal pulses stored in the storage unit 9, it can be determined that some constant load is applied to the switching mechanism 61. It is determined that the operation has failed.

As a result, when it is determined that the operation is temporarily defective, the control unit 8 performs control to return the number of pulses given to the panel opening / closing motor 43 to the normal number of pulses at the start of the next operation or the like. On the other hand, when it is determined that there is a permanent malfunction, control is performed so as to give the increased pulse to the panel opening / closing motor 43 even when the next operation is started.
[Features of this indoor unit]
(1)
In the indoor unit 2 of the present embodiment, as a result of detecting whether or not the detection units 80a and 80b are in the fully open state or the fully closed state with respect to the movement of the front panel 7 at the start of operation or the like, the fully opened or fully closed state If it is detected that it is not, a retry operation is performed on the panel opening / closing motor 43 that gives a driving force to move the front panel 7 under the condition that the pulse is increased.

  In a conventional indoor unit, when an operation failure due to deterioration over time occurs, when a malfunction is detected, control is performed so as to perform a so-called retry operation in which an opening / closing operation is performed again under the same conditions. However, in the retry operation, the opening / closing operation is simply performed again under exactly the same conditions. For this reason, the malfunction due to an increase in the load of the opening / closing mechanism due to aged deterioration cannot be solved. At this time, for example, when the cooling operation is started even though the front panel 7 is not fully opened, the first panel 71 is directly exposed to the cold air. For this reason, the first panel 71 is cooled and condensation occurs on the surface of the first panel 71. Condensation that has occurred on the surface of the first panel 71 drips into the room, so there is a high possibility that it will be a complaint from the user. Therefore, in the conventional air conditioning indoor unit, there has been no choice but to detect a malfunction due to an increase in load due to deterioration over time as a failure.

  On the other hand, in the indoor unit 2 of the present embodiment, the control unit 8 transmits the driving force to the opening / closing mechanism 61 when the malfunction of the opening / closing mechanism 61 due to such aged deterioration is detected. Control is performed to increase the pulse applied to the panel opening / closing motor 43. That is, the control unit 8 controls the panel opening / closing motor 43 so that the operation amount for the opening / closing mechanism 61 transmitted from the panel opening / closing motor 43 is larger than normal, and so-called additional tightening is performed.

As a result, the opening / closing mechanism 61 is deteriorated due to aged deterioration of the plurality of gear portions (the first driving gear 44, the second driving gear 45, the first opening / closing gear 630, and the second opening / closing gear 631) included in the opening / closing mechanism 61. Even when the load on the operation becomes larger, the control unit 8 performs control so as to add a pulse so as to increase the operation amount of the panel opening / closing motor 43 than in the normal state.
For this reason, even when the load is increased in the opening / closing mechanism 61 that moves the front panel 7, the front panel 7 is moved to the fully closed state shown in FIG. 9A or the fully opened state shown in FIG. 9C. Can be moved. Therefore, it is possible to avoid diagnosing a permanent malfunction of the opening / closing mechanism 61 as a failure due to aged deterioration or the like that has been diagnosed as a failure in a conventional indoor unit. As a result, the product life of the indoor unit 2 can be extended.

(2)
In the indoor unit 2 of the present embodiment, the opening / closing mechanism 61 as a panel opening / closing mechanism has a plurality of gear portions (first driving gear 44, second driving gear 45, first opening / closing gear 630 and second opening / closing gear 631). It has.
As described above, since the opening / closing mechanism 61 is a complicated mechanism including parts such as a plurality of gears, the malfunction may be diagnosed even though the malfunction due to aging is likely to occur. Can be avoided.

(3)
The indoor unit 2 of the present embodiment includes a drive mechanism 61 that moves the first panel 71 and the second panel 72 as a panel opening / closing mechanism.
In this way, by applying the present invention to the indoor unit 2 having a complicated mechanism for moving the first panel 71 and the second panel 72, the permanent opening / closing mechanism 61 caused by aged deterioration or the like can be used. The effect that the product life of the indoor unit 2 can be extended while avoiding diagnosis of malfunction as a failure can be more effectively exhibited.

In particular, in the mechanism in which the first panel 71 and the second panel 72 are linked and moved as in the present embodiment, the configuration of the gear unit and the like is complicated, and the clearance of the gear unit and the like in the opening / closing mechanism is small. Become. For this reason, since it becomes easy to generate | occur | produce the malfunction resulting from aged deterioration, it is especially preferable to apply this invention with respect to the indoor unit 2 of this embodiment.
(4)
In the indoor unit 2 of the present embodiment, the control unit 8 determines whether or not the malfunction of the opening / closing mechanism 61 is constant.

  The control unit 8 stores in the storage unit 9 the time required to reach the fully open state or the fully closed state corresponding to the pulse increased from the start of operation when the opening / closing mechanism 61 is in a no-load state. For this reason, during the retry operation, the time from the start of operation to the panel opening / closing motor 43 is given to the panel opening / closing motor 43 to reach the fully open state, etc., and the measurement result and the pulse stored in the storage unit 9 are measured. Compare the corresponding time. Here, if the measurement result almost coincides with the stored time, it is determined that the detected malfunction is temporary, and if it is greater than the stored time, the detected malfunction is Judged as permanent.

Thereby, it is possible to easily determine whether or not to give an increased pulse to the panel opening / closing motor 43 from the beginning at the start of the next operation or the like. Therefore, when it is known from the beginning that it is a permanent malfunction, it is possible to perform control so as to give an increased pulse from the beginning without detecting a useless malfunction.
(5)
In the indoor unit 2 of the present embodiment, a stepping motor is used as a drive source for driving the opening / closing mechanism 61.

Accordingly, by using a stepping motor capable of controlling the rotation amount with a pulse as a drive source of the opening / closing mechanism 61, the operation amount of the drive source can be easily adjusted only by increasing / decreasing the pulse.
(6)
In the indoor unit 2 of the present embodiment, limit switches are used as detection units for detecting the fully open state and the fully closed state of the first panel 71 and the second panel 72.

Thereby, in the fully opened state and the fully closed state, the limit switch is disposed at a position where the first panel 71 or the second panel 72 contacts, thereby easily detecting whether or not the fully opened state or the fully closed state is established. be able to.
[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the said embodiment, the panel opening / closing mechanism which drives both the 1st panel 71 and the 2nd panel 72 was mentioned as an example, and was demonstrated. However, the present invention is not limited to this.
For example, a panel opening / closing mechanism that drives either one of the first panel 71 and the second panel 72 may be used.

In addition, the present invention can be similarly applied to an indoor unit having a configuration in which both the intake port and the exhaust port are opened and closed by a single panel.
(B)
In the above embodiment, the control unit 8 gives a normal pulse to the panel opening / closing motor 43 every time when the operation is started, and in the retry operation performed when a malfunction is detected here, than the normal pulse. An example in which a large pulse is given to the panel opening / closing motor 43 has been described. However, the present invention is not limited to this.

For example, when an operation failure is detected for the first time, a pulse is given to the panel opening / closing motor 43 under the same conditions in the first retry operation, and when an operation failure is still detected, a pulse larger than normal is opened / closed. It may be controlled so as to be given to the motor 43.
As a result, in the case of an operation failure temporarily caused by dust or the like being caught between the gear portions of the opening / closing mechanism 61, the first panel 71 and the first panel 71 and the second panel can be operated only by a retry operation that gives a normal pulse without increasing the pulse. The two panels 72 can be moved until they are fully opened or fully closed. Therefore, it is possible to avoid unnecessary pulse increase control.

(C)
In the above embodiment, as illustrated in FIG. 10, the example in which the retry operation is performed only once after the operation failure is detected has been described. However, the present invention is not limited to this.
For example, after detecting a malfunction, control for increasing the pulse in a plurality of stages may be performed. According to this, it is possible to avoid immediately diagnosing a failure with respect to the opening / closing mechanism 61 on which a load having a magnitude that could not be avoided by one retry is applied.

(D)
In the above-described embodiment, the example in which the normal pulse condition is given to the panel opening / closing motor 43 every time when the operation is started has been described. However, the present invention is not limited to this.
For example, as described above, when the control unit 8 determines that the malfunction detected in the previous detection is permanent, the increase pulse stored in the storage unit 9 is changed from the start of operation. You may give with respect to the panel opening / closing motor 43. FIG.

As a result, it is possible to avoid performing useless detection when it is known that a permanent malfunction is detected and the malfunction is found to be normal under normal pulse conditions.
(E)
In the said embodiment, the 1st panel 71 and the 2nd panel 72 were linked mutually, and it demonstrated and demonstrated as an example the panel opening / closing mechanism moved simultaneously. However, the present invention is not limited to this.

For example, the first panel 71 and the second panel 72 may be a panel opening / closing mechanism that is not linked to each other and moves separately.
In addition, since it becomes a more complicated mechanism by setting it as the panel opening / closing mechanism which mutually links and moves the 1st panel 71 and the 2nd panel 72 like this embodiment, it is easy to produce the malfunctioning by age-related deterioration. Become. For this reason, if the present invention is applied to the indoor unit 2 having such a complicated panel opening / closing mechanism, the product life can be extended, which is more effective.

(F)
In the said embodiment, the stepping motor was mentioned as an example and demonstrated as the panel opening / closing motor 43 used as a drive source. However, the present invention is not limited to this.
For example, even when another drive source such as a servo motor is used, the same effect as described above can be obtained. However, the use of a stepping motor is more preferable because the operation amount of the drive source can be controlled by increasing or decreasing the pulse.

(G)
In the embodiment described above, an example in which a limit switch is used as the detection unit has been described. However, the present invention is not limited to this.
For example, even when a non-contact type detection unit such as an infrared sensor is employed, the same effect as described above can be obtained.

(H)
In the above embodiment, two limit switches are provided, and an example in which both the fully open state and the fully closed state are detected has been described. However, the present invention is not limited to this.
For example, the indoor unit 2 may be provided with only one limit switch for detecting the fully open state. In this case, the limit switch can detect a fully open state and a state that is not the fully open state.

  The air conditioning indoor unit of the present invention has an effect that it is possible to avoid a malfunction of the panel opening / closing mechanism that is constantly generated due to deterioration over time and diagnosed as a failure. The present invention can be widely applied to an air conditioning indoor unit having a mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance schematic of the air conditioner provided with the air-conditioning indoor unit which concerns on one Embodiment of this invention. The refrigerant circuit diagram of an air conditioner. The exploded perspective view of an indoor unit. (A) is a front view of an indoor unit, (b) is a side sectional view of the indoor unit. The exploded perspective view near the left end of an indoor unit. The side view of a drive machine. The figure which looked at the front grille assembly from the back side. The side view of a 1st opening / closing mechanism. The figure which shows the opening / closing operation | movement of a 1st panel and a 2nd panel. The flowchart which shows an example of the control flow after the driving | operation start of the air-conditioning indoor unit of this embodiment. The time chart which shows the pulse given to a drive source at the time of the driving | operation start of the air-conditioning indoor unit of this embodiment.

Explanation of symbols

1 Air conditioner 2 Indoor unit (air conditioning indoor unit)
DESCRIPTION OF SYMBOLS 8 Control part 9 Memory | storage part 27 1st suction inlet 29 Outlet part 41 Driver 42 Main body casing 43 Panel opening / closing motor (drive source)
44 First drive gear (gear part, panel opening / closing mechanism)
45 Second drive gear (gear part, panel opening / closing mechanism)
60 Front grill 61 Opening / closing mechanism (Panel opening / closing mechanism)
62 fixing part 63 first opening / closing mechanism (panel opening / closing mechanism)
64 Second opening / closing mechanism (panel opening / closing mechanism)
67 First panel support member (panel open / close mechanism)
68 Second panel support member (panel open / close mechanism)
71 1st panel (movable air outlet panel)
72 Second panel (movable inlet panel)
80a 1st detection part (detection part)
80b 2nd detection part (detection part)
630 First opening / closing gear (gear part)
631 Second open / close gear (gear part)

Claims (11)

A driving source and a panel opening / closing mechanism that operates by transmitting a driving force from the driving source;
A panel moved by the panel opening and closing mechanism;
A detection unit for detecting a movement state of the panel;
A control unit for controlling an operation amount of the drive source transmitted to the panel opening and closing mechanism based on a detection result in the detection unit;
Air conditioner indoor unit equipped with. The panel opening / closing mechanism includes a plurality of gear portions that transmit the driving force of the driving source and move the panel.
The air conditioning indoor unit according to claim 1. The panel opening / closing mechanism is a panel opening / closing mechanism of a movable suction port panel.
The air conditioning indoor unit according to claim 1 or 2. The panel opening / closing mechanism is a panel opening / closing mechanism of a movable air outlet panel.
The air conditioning indoor unit according to any one of claims 1 to 3. When the control unit detects a malfunction of the panel opening / closing mechanism, the control unit controls the operation amount of the drive source that transmits a driving force to the panel opening / closing mechanism to be larger than normal.
The air conditioning indoor unit according to any one of claims 1 to 4. The control unit includes a storage unit that stores the changed operation amount of the drive source.
The air conditioning indoor unit according to any one of claims 1 to 5. The control unit controls the operation amount of the drive source with respect to the panel opening / closing mechanism based on a detection result in the detection unit every time operation is started.
The air conditioning indoor unit according to any one of claims 1 to 6. The drive source is a stepping motor,
The air conditioning indoor unit according to any one of claims 1 to 7. The control unit increases or decreases the pulses applied to the drive source based on the detection result in the detection unit.
The air conditioning indoor unit according to any one of claims 1 to 8. Claim plan correction The control unit determines whether it is a permanent malfunction based on the detection result detected in the detection unit and the number of pulses applied to the drive source,
The air conditioning indoor unit according to claim 9. The detection unit has a limit switch,
The air conditioning indoor unit according to any one of claims 1 to 10.

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