JPH0434356Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a louver device disposed at the outlet of an air conditioner such as an air conditioner.

<Prior Art> A conventional structure is shown in FIGS. 3 and 4. Figure 3,
In FIG. 4, reference numeral 1 denotes a horizontally elongated air outlet, and a wind direction plate 2 that changes the direction of the blown air in the vertical direction is rotatably supported at this air outlet.
This wind direction plate 2 has a horizontally long flat plate shape, and has a rotating shaft 2a.
is made to protrude to the outside of the air outlet 1. A crank 3 is fixed to this externally projecting shaft 2a, and this crank 3 rotates as the wind direction plate 2 rotates. A rod 4 is connected to the crank 3, and the other end of the rod 4 is connected to a rotary plate 6 fixed to a motor 5. This rotating plate 6 has a large diameter on half its circumference and a small diameter on the remaining half of its circumference, and the other end of the rod 4 is connected to a position spaced apart from the rotating shaft 6a of this rotating plate 6. It functions as a kind of crank. Reference numeral 7 denotes a position detection device arranged so as to sandwich the outer periphery of the rotary plate 6 . This position detection device 7 is provided with a photosensitive switching device such as a light emitting device and a photointerrupter on the inside, and when the large diameter portion of the rotary plate 6 blocks the light from the light emitting device, it acts as a switch.
It acts as a switch that turns OFF and turns ON when the photosensitive element detects the light from the light emitting element when passing through a small diameter section. By this switching, the angular position of the rotary plate 6 and the position of the wind direction plate 2 are recognized.

Now, the operation of the louver device will be explained. Rotation of the output shaft of the motor 5 causes the rotation plate 6 to rotate. This rotary plate 6 acts as a kind of crank and drives the rod 4 to swing the crank 3, and the swinging of the crank causes the wind direction plate 2 to move.
It is designed to swing up and down. When the rotating plate 6 rotates once, the wind direction plate 2 reciprocates once.

In addition, when using this louver for an air conditioner,
It is necessary to change the angle of the wind direction plate 2 depending on cooling or heating. In other words, in order to direct the air to the upper part of the room (upward) during cooling, the wind direction plate 2 is oriented approximately horizontally (a slightly downward direction will suppress dew condensation near the upper part of the air outlet), and during heating the air is directed toward the lower part of the room. In order to direct the air to the side (downward), the wind direction plate 2 is oriented vertically. In order to detect this horizontal state and vertical state, when the wind direction plate 2 is in the horizontal direction, the large diameter portion of the rotary plate 6 is detected by the detection device 7.
The switch is now turned off just in time. When this switch is turned off, the control circuit recognizes that the wind direction plate 2 is in a horizontal state. At this point, the crank mechanism is at top dead center. On the other hand, when the wind direction plate 2 becomes vertical, the large diameter part of the rotating plate 6 just passes the detection device 7 and reaches the small diameter part, and the switch is turned on.
becomes. When this switch is turned on, it is recognized that the wind direction plate 2 is in a vertical state. At this point, the crank mechanism is at the bottom dead center.

This kind of control is performed not only when switching between cooling and heating operations, but also when stopping operations, since the airflow direction plate 2 is held vertically downward to hide the air outlet, so it is automatically activated by operating the stop switch. Make sure it is oriented vertically. Further, at the start of operation, for example in the case of cooling operation, the vertical state must be changed to the horizontal state.

On the other hand, the direction in which the wind blows is not limited to horizontal or vertical directions, but can be oriented at a predetermined angle according to the user's preference. In this case, angle control is performed based on a switch on the rotating plate 6. That is, when turning downward by 45°, for example, the time required to reach the desired angle is counted, for example, by the number of clocks, with reference to the vertical or horizontal state, and the contents of this count are stored as angle information. Based on this memory content, for example, when restarting the operation, in order to reproduce the state before stopping, the ON time of the detection device 7 is counted from the vertical state up to the memory content, and when the count is up, the drive of the motor 5 is stopped. Control.

It is also possible to swing the wind direction plate 2 continuously. Continuous oscillations of this type may be performed when the user desires, or during the initial stage of operation, continuous oscillations are performed unconditionally to provide diffused air flow, and then fixed when conditions such as temperature rise to a predetermined level. (Upward for cooling, downward for heating, or a position stored in the control circuit by the user).

<Problem> In such a louver device, for example, in the vertical state and the horizontal state, the crank mechanism is at the dead center, and theoretically neither of the crank mechanisms rotates. In reality, there is a slight play in the connecting part of the crank mechanism to prevent it from reaching the complete dead center, but it is still close to the dead center, so when you try to move the wind deflector by hand, the motor There were cases where the crank, etc. could not rotate and the continuous parts were damaged.

Further, even if a certain degree of rotational force was obtained and the wind direction plate could be rotated by hand, an unreasonable force would be applied to the reduction gear of the motor, and there was a possibility that the gear would be damaged.

For example, when used in an indoor unit of an air conditioner, the air outlet is usually provided at the bottom of the front side of the indoor unit, but when performing installation work, the front panel is removed and the air direction plate Since the front panel cannot be removed unless it is oriented horizontally, the construction worker may forcefully rotate the wind direction plate 2. In addition, when the user cleans the filter after installation, the filter is designed to be pulled downward using a knob provided near the air outlet 1, so if the wind direction plate 2 is facing upward, the filter can be pulled out. Sometimes, the momentum was too high and force was applied in the direction to rotate the wind direction plate 2. In such cases, as mentioned above, the crank mechanism and the reduction gear built into the motor may be damaged.

Therefore, it is conceivable to provide a slip mechanism in the transmission path to release the transmission force when the load exceeds a predetermined level, but there is a problem when detecting the rotation angle of the wind direction plate 2 as described above. . In other words, it is sufficient that the rotating plate 6 is also rotated in synchronization with the slip mechanism, but if a slip mechanism is provided at the connecting portion of the wind direction plate 2 in the crank mechanism, even if the wind direction plate 2 is rotated, the crank mechanism ( In particular, since the rotary plate 6) itself does not rotate, the rotation angle of the wind direction plate 2 corresponding to the rotation angle of the rotary plate 6 changes.
The position of the wind direction plate 2 cannot be detected by the rotating plate 6. When this happens, the wind direction plate cannot be directed within the normal angle range.

<Means for Solving the Problems> A slip mechanism is provided in the path of the crank mechanism for canceling the transmission of force when the load exceeds a predetermined load, and a member for regulating the rotation angle of the wind direction plate is provided.

<Function> If the position of the wind direction plate corresponding to the position detection device changes for some reason, if the position of the wind direction plate is controlled based on the output of the position detection device, the wind direction plate will try to move in a completely different angular range. However, since the rotation angle of the wind direction plate is regulated by the regulation member, even if it tries to rotate to a different angle range, it will slip at the point of the regulation member, and when the wind direction plate faces the corresponding position, the position detection device and the wind direction plate will corresponds.

<Examples> Examples of the present invention will be described below with reference to the drawings.
Incidentally, parts that are the same as the conventional ones are given the same reference numerals.

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the same. In these figures 1 and 2,
2 is a wind direction plate provided at the air outlet 1, and is connected to a rotating shaft 2a.
is made to protrude outside from a hole 1a provided in the outlet wall. The tip of this rotating shaft 2a is formed into a quadrangular column shape. Reference numeral 3 denotes a crank connected to the rotating shaft 2a, and the base side of the crank 3 has a cylindrical shape that fits into the hole 1a, and the tip side is provided with a crank portion 3a and a pin 3b. The shaft 2a of the wind direction plate 2 is inserted into the cylindrical portion of the crank 3. In the inserted state, the square prism portion of the shaft 2a has a shape slightly protruding from the cylindrical portion. A disk 8, a spring 9, and a screw 10 are attached to the protruding square column portion of the shaft 2a. The disk 8 is pressed against the tip of the cylindrical portion of the crank 3, and has a hole 8a in the center thereof through which a square column portion is inserted. The screw 10 is screwed into the square column part, and has a collar piece 10a on the tip side.
The spring 9 is compressed between the flange piece 10a and the disc 8. The force of the spring 9 to expand causes the disk 8 to come into pressure contact with the tip of the crank 3. When the rotation of the motor 5 is transmitted to the rotary plate 6, the rod 4, and the crank 3, the spring force of the spring 9 is generated by the friction force between the disc 8 and the tip of the crank 3, which causes the wind direction plate to move. 2 is driven, and when a certain amount of load or rotational force is applied from the outside to the wind direction plate 2, which may damage the crank mechanism and the reduction gear of the motor, the disk 8 and the tip of the cylindrical portion of the crank 3 slip. The force is set to be enough to release the lever load.

Reference numeral 4 denotes a rod connected between the crank 3 and the rotary plate 6, and one end of which is rotatably supported by the pin 3b. The other end of this rod 4 is connected to a pin 6a of a rotating plate 6. The pin 6a of the rotary plate 6 is located eccentrically from the center of rotation of the rotary plate 6, and causes the rotary plate 6 to function as a kind of crank. This rotary plate 6 is driven by a motor 5 having a built-in reduction gear, and is fixed by pillars 11, 11 protruding from the main body. 7 is a position detection device supported by a substrate 7a, and this substrate 7a is mounted between a pair of groove members 12, 12 provided in the main body.

Reference numerals 13 and 14 are regulating members provided at the air outlet 1. These regulating members 13 and 14 are for regulating the rotation range of the wind direction plate 2 from the horizontal direction to the vertical range, and are located at the position where the wind direction plate 2 comes into contact with the wind direction plate 2 at a position where the wind direction plate 2 is horizontal or vertical. It is provided.

Next, the operation of the louver device having the above configuration will be explained. The normal operation is the same as the conventional one, so it will be omitted. The operation will be described below in the case where the wind direction plate 2 is moved for some reason. As mentioned above, when a force exceeding a predetermined value is applied to the wind direction plate 2 during construction or filter cleaning, the rotating shaft 2a of the wind direction plate 2 is held on the crank 3 by the pressing force (frictional force) of the spring 9. , the wind direction plate 2 will move freely in the direction in which the force is applied. In this case, only the wind direction plate 2 will rotate even though the rotation plate 6 is not moving, and the correspondence relationship between the wind direction plate 2 and the rotation plate 6 will be out of order. For example, suppose that the wind direction plate 2, which originally corresponded to the rotating plate 6 in a vertical position, is moved upward for some reason. Even in this case, angle control is performed based on the position of the rotary plate 6, so
For example, when turning from a vertical position to a horizontal position, since the wind direction plate 2 is being moved upward, the wind direction plate 2 tends to rotate further upward from the horizontal position. However, when the wind direction plate 2 comes into contact with the regulating member 12, it does not rotate beyond the horizontal position. In the conventional case, the crank mechanism and the reduction gear of the motor would be damaged due to the excessive load applied, but due to the slip mechanism using the disk 8 and spring 9, the crank 3 will spin idly. Therefore, the motor 5 will stop when the rotary plate 6 rotates to a position corresponding to the horizontal position of the wind direction plate 2. That is, while the wind direction plate 2 remains in the horizontal position due to the slip, the rotary plate 2 catches up (synchronizes) with the normal correspondence relationship.

Also, when directing the wind direction plate 2 at an intermediate angle, if the correspondence relationship is out of order, the wind direction plate 2 will be oriented at an angle that is not desired at all. Then, as described above, the deviation can be absorbed by the slip, the correspondence relationship can be made normal, and then the rotation can be performed again to a predetermined angle. Of course, the correspondence may be returned to normal by slipping it in the vertical position. The control after the regular correspondence is established is the same as before.

In addition, even in the case of continuous oscillation, any deviation in the correspondence relationship at the vertical or horizontal position is absorbed by the slip mechanism and becomes the normal correspondence relationship, so it is necessary to accurately control the fixed angle from continuous oscillation to a specific angle. I can do it.

<Effects> According to the present invention, the slip mechanism prevents mechanical components from being damaged even if an excessive force is applied to the wind direction plate. Although the provision of the slip mechanism may cause the correspondence between the position detection device and the wind direction plate to be out of order, the deviation is corrected by the action of the regulating member and the slip mechanism, making accurate angle control possible. Become.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of the embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a front view of the conventional device, and Fig. 4
The figure is the same side view. 1... Air outlet, 2... Wind direction plate, 3... Crank, 4... Rod, 5... Motor, 6... Rotating plate (also serves as crank), 7... Position detection device, 8... Disc, 9...Spring, 10...Screw.

Claims (1)

[Scope of Claim for Utility Model Registration] A wind direction plate is rotatably supported, a swinging mechanism consisting of a crank, a rod, and a motor is connected to this wind direction plate, and a position detection device is provided to detect the rotation angle of this wind direction plate. In the louver, a slip mechanism is provided in the transmission path from the motor to the wind direction plate for canceling the transmission of force when a load exceeds a predetermined load, and a member is provided for regulating the rotation angle of the wind direction plate.