JPH05759Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a wind direction changing device for an air conditioner.
More specifically, the present invention relates to a wind direction changing device that can automatically change the wind direction using a shape memory alloy spring, and can also change the wind direction manually.

<Prior art> A wind direction changing device using a shape memory alloy spring as a driving source has been provided for a long time, and the wind direction can be changed even by manual operation (Utility Model Application No. 1989-1999).
(See Publication No. 85854).

More specifically, as shown in FIG. 6, in the wind direction changing device, the left rotation shaft 8b of the wind direction change blade 8 is supported by a left bearing 9, and the right rotation shaft 8a is supported by the length of the blowout grill 3. Hole 3a
into the locking hole 6e of the lever arm 6 through the
The lever arm 6 is inserted into the right bearing 4, and the right end 8c of the wind direction changing blade 8 and the lever arm 6
A coil spring 7 made of a shape memory alloy and formed in a coil shape is provided between the mounting hole 6a and the mounting hole 6a. The right bearing 4 has a moving portion 4 notched in the axial direction.
a, and an engaging portion 4b communicating with the moving portion 4a and extending in the circumferential direction,
The lever arm 6 has a convex portion 10 that selectively engages with the moving portion 4a or the engaging portion 4b, and is compressed when the convex portion 10 is engaged with the engaging portion 4b. A coil spring 11 is provided. Note that 5 is a knurled portion formed at a predetermined position of the shaft insertion hole of the lever arm 6.

Therefore, when the convex portion 10 is engaged with the engaging portion 4b, the lever arm 6 is in contact with the right bearing 4.
When the right rotation shaft 8a is pushed in, the right rotation shaft 8a does not engage with the knurled portion 5. In this state, the shape memory alloy coil spring 7 expands and contracts as the temperature changes, and its relative position with respect to the lever arm 6 changes. That is, the lever arm 6
Since the position does not change, the wind direction changing blade 8 is rotated depending on the temperature change, and the conditioned air discharge angle can be changed.

Conversely, when the convex portion 10 is engaged with the moving portion 4a, the lever arm 6 is slid by the elastic force of the coil spring 11, and the right rotation shaft 8
a engages with the knurled portion 5. In this state, the lever arm 6 and the right rotation shaft 8a
Since a frictional force larger than that of the shape memory alloy coil spring 7 acts between the lever arm 6 and the wind direction changing blade 8, the relative position between the lever arm 6 and the wind direction changing blade 8 continues to be maintained constant, and the lever arm 6 can be rotated by manual operation. Only in this case, the wind direction changing blade 8 is rotated, and the conditioned air discharge angle can be changed.

That is, by selecting the state of the lever arm 6, it is possible to select a state in which the wind direction can be changed automatically and a state in which the wind direction can be changed only by manual operation.

<Problems to be Solved by the Invention> In the wind direction changing device having the above configuration, it is housed so as to be movable with respect to the right bearing 4, and is prevented from moving in the extraction direction by engaging with the engaging portion 4b. Not only is the lever arm 6 required, but also the coil spring 11 that moves the lever arm 6 by overcoming the frictional force between the right rotation shaft 8a and the knurled portion 5 is required, which increases the complexity of the configuration. There's a problem.

Furthermore, since the lever arm 6 must be moved against the coil spring 11, which has a considerably large elastic force, a considerably large operating force (the frictional force between the right rotation shaft 8a and the knurled portion 5, and the coil spring 11) is required.
1), which not only significantly reduces the operability but also requires the lever arm 6 to be made stronger.

<Purpose of the invention> This invention was devised in view of the above-mentioned problems, and it is possible to simplify the configuration, reduce the required operating force, and to automatically change the wind direction. It is an object of the present invention to provide a wind direction changing device for an air conditioner that allows easy selection of a wind direction changing state by manual operation.

<Means for solving the problem> In order to achieve the above object, the wind direction changing device of this invention has a wind direction changing blade supported at the conditioned air discharge outlet of an air conditioner, and a wind direction changing blade that A spring made of shape memory alloy that provides a rotational force of It has a friction support member that provides frictional force.

However, the friction support member may support only one rotating shaft of the wind direction changing blade.

Further, the rotating shaft may have bulges having different outer diameters at predetermined positions, and the friction support member may have a recess that engages with each bulge.

Furthermore, the friction support member may have a rotary shaft insertion hole with a small diameter in the inner part, or a rotary shaft insertion hole with an inward knurling portion formed at a predetermined position. You may do so. In these cases, the friction support member is preferably made of rubber.

Furthermore, it is preferable that the rotating shaft has a lever for sliding operation at a predetermined position.

<Function> With the wind direction changing device configured as described above, when the rotating shaft is slid in the direction in which a frictional force greater than the rotational urging force by the shape memory alloy spring is applied between the friction support member and the When the wind direction changing operation by the memory alloy spring is reliably prevented and the wind direction changing blade is rotated with a force that overcomes the sum of the above frictional force and the elastic force of the shape memory alloy spring. Only the wind direction can be changed.

On the other hand, if the rotating shaft is slid in the opposite direction to significantly reduce the frictional force, the shape memory alloy spring can automatically change the wind direction.

The friction support member may support both rotating shafts of the wind direction changing blade, or may support only one rotating shaft, achieving the same effect as above. can do.

Further, when the rotating shaft has bulges at predetermined positions with different outer diameters, and the friction support member has a recess that engages with each bulge, the bulge Depending on which recessed part the protruding part engages with, it is possible to select a state in which a large frictional force is applied or a state in which a small frictional force is applied.

Furthermore, even when the friction support member has a rotary shaft insertion hole with a small inner diameter,
Alternatively, the same effect as described above can be achieved when the rotary insertion hole is provided with an inward knurling portion formed at a predetermined position. In these cases, if the friction support member is made of rubber, it is relatively easy to manufacture and can provide a sufficiently large frictional force.

Furthermore, if the rotating shaft has a lever for sliding operation at a predetermined position, the wind direction can be automatically changed by holding the lever and sliding it without having to have a wind direction changing blade. It is possible to select the state and the state in which the wind direction is changed by manual operation.

<Examples> Hereinafter, examples will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a schematic perspective view showing an embodiment of the wind direction changing device of this invention, in which a wind direction changing blade 28 is rotatably provided in a conditioned air discharge part 21 of an air conditioner. A coil spring 27 made of a shape memory alloy that rotationally biases the wind direction changing blade 28 in one direction and a normal coil spring 32 that rotationally biases the wind direction changing blade 28 in the opposite direction are provided. A friction support member 26 is provided to support the shaft 28a.

To explain in more detail, the wind direction changing blade 2
Reference numeral 8 changes the discharge direction of the conditioned air up and down by rotation, and rotation shafts 28a and 28e are integrally provided at both ends in the longitudinal direction.
And, at the base of both the rotating shafts 28a, 28e,
Spring mounting plates 27a and 32a are integrally provided, respectively, and spring mounting plates 27b and 32 are provided at predetermined positions inside the conditioned air discharge portion 21.
A shape memory alloy spring 27 and a normal spring 32 are provided between the spring 27 and the spring 27b.

The rotating shaft 28a has a small-diameter shaft at the tip, and a large-diameter spherical portion 28b and a small-diameter spherical portion 28c at the small-diameter shaft base and tip, respectively.
are integrally provided. In addition, the large diameter spherical part 28
A lever 2 for manual operation is located at a predetermined position on the base side of b.
8d is integrally provided.

The friction support member 26 is connected to the conditioned air discharge section 21
It is made of hard rubber and is immovably provided on a support frame 22 attached to a predetermined position, and has a hole 26a formed in the center thereof through which a rotating shaft 28a is inserted. The hole 26a has a large diameter on the opening side and a small diameter on the inner back side, and a spherical recess 26b having substantially the same shape as the spherical part 28b is formed at the boundary between the large diameter part and the small diameter part. In addition, a spherical recess 26c having substantially the same shape as the spherical portion 28c is provided at the innermost part.
is formed. Therefore, a sufficiently large frictional force acts between the rotating shaft 28a and the friction support member 26 when the rotating shaft 28a is completely inserted into the hole 26a.
In a state in which the rotating shaft 28a is slid such that the spherical portion 28c is located in the spherical recess 26b, almost no frictional force can be applied between the rotary shaft 28a and the friction support member 26.

Further, a bearing 23 is attached to the conditioned air discharge portion 21 at a position directly facing the support frame 22, and supports the other rotating shaft 28e of the wind direction changing blade 28 in a freely rotatable and slidable manner. and,
A stopper 28f for regulating the sliding amount is slidably provided at a predetermined position near the base of the rotating shaft 28e.

The wind direction changing operation by the wind direction changing device having the above configuration is as follows.

[I] In the case of changing the wind direction by manual operation In this case, all you have to do is hold the manual operation lever 28d and slide the wind direction changing blade 28 toward the friction support member 26, so that the rotating shaft 28a is aligned with the hole 26a.
2, and a sufficiently large frictional force is exerted between it and the frictional support member 26 (see FIG. 2A).

Therefore, in this state, even if the ambient temperature changes and the rotation urging force by the shape memory alloy coil spring 17 is applied, the rotation of the wind direction changing blade 28 is reliably prevented by the frictional force. .

Then, only when a rotational force larger than the frictional force is applied via the lever 28d, the wind direction changing blade 28 is rotated by a desired angle, and when the application of the rotational force is canceled, the wind direction changing blade 28 is left as it is. can be maintained in this state.

[] In the case of automatic wind direction change In this case, all you have to do is hold the manual operation lever 28d and slide the wind direction change blade 28 in the direction away from the friction support member 26, and the rotating shaft 28a
is pulled out from the hole 26a to some extent, the large diameter spherical part 28b is completely pulled out, and the small diameter spherical part 28c is accommodated in the spherical recess 26b, so that there is almost no friction between it and the friction support member 26. The state is such that no force is applied (see Figure 2B).

Therefore, in this state, as the ambient temperature changes and the coil spring 27 made of shape memory alloy deforms, it is possible to apply a rotational biasing force to the wind direction changing blade 28, and it is possible to apply a rotational urging force to the wind direction changing blade 28, unlike a normal coil spring. It is rotated until it balances with the rotation urging force by 32 and stopped.

When the rotational force is applied via the lever 28d, the wind direction changing blade 28 can be rotated by a desired angle, but when the rotational force is released, the coil springs 27, 32 rotate the wind direction changing blade 28. The biasing forces are restored to a balanced state, and changes in wind direction due to manual operation can be reliably prevented.

<Embodiment 2> FIG. 3 is a longitudinal sectional view of a main part showing another embodiment, and the only difference from the above embodiment is the shape of the rotating shaft 28a and the shape of the hole 26a.

Specifically, the rotating shaft 28a is formed in a tapered shape, and the hole 26a is formed in a tapered shape that becomes narrower on the inner back side.

Therefore, in the case of this embodiment as well, by sliding the rotary shaft 28a together with the wind direction changing blade 28, it is possible to easily change the state in which the frictional force with the friction support member 26 becomes large and the state in which the frictional force becomes significantly small. Therefore, a manual wind direction change state and an automatic wind direction change state can be easily selected.

<Embodiment 3> FIG. 4 is a vertical sectional view of a main part showing still another embodiment, and the difference from the above embodiment is that the rotating shaft 28a
The only difference is that the shaft has the same shape over the entire range, and a knurled portion 26d is formed at a predetermined position on the inner back side of the hole 26a.

Therefore, also in the case of this embodiment, by sliding the rotating shaft 28a together with the wind direction changing blade 28, the frictional force between the rotating shaft 28a and the knurled portion 26d is increased.
It is possible to easily select between the state in which the two are engaged) and the state in which the frictional force is significantly reduced, and the state in which the wind direction is changed by manual operation and the state in which the wind direction is automatically changed can be easily selected.

In each of these embodiments, since the load of the wind direction changing blade 28 is supported by the friction support member 26, the friction support member 2 due to the load is
In order to prevent deformation of the friction support member 26, it is preferable to reinforce at least the lower outer periphery of the friction support member 26 with a metal plate or the like.

<Embodiment 4> FIG. 5 is a vertical cross-sectional view of a main part showing still another embodiment, and the difference from the embodiment in FIG. 1 is that the rotating shaft 2
A support member 3 having a predetermined range of the base part 8a having the same outer diameter and rotatably supporting the rotating shaft 28a at a position separated from the opening of the friction support member 26 by a predetermined distance.
The only point is that 3 is provided. However, the above-mentioned predetermined distance is the same as when the wind direction changing blade 28 slides.
It is set so as not to come into contact with either the large diameter ball portion 28b or the lever 28d.

Therefore, in the case of this embodiment, the frictional force between the rotating shaft 28a and the friction support member 26 in the state where the wind direction is automatically changed can be reduced to zero, and the Since the load does not need to be supported by the friction support member 26, it becomes possible to form the friction support member 26 with relatively soft rubber or the like, and as a result, the friction support member 26 becomes easily deformed, so the wind direction changing blade 28
can be easily slid with relatively little force.

Note that this invention is not limited to the above-mentioned embodiment, and for example, it is possible to support the rotating shafts on both sides of the wind direction changing blade 28 by friction support members, and also to support the rotating shafts 28a and 28a. It is possible to change the shape of the hole 26a as appropriate to select a state in which a large frictional force is applied, and furthermore, the lever 28d for manual operation can be omitted and the wind direction changing blade 28 can be held and slid. In addition, it is possible to integrally attach the stopper 28f to the rotating shaft 28e or the bearing 23, and it is possible to omit the normal spring 32. Various design changes can be made without changing the gist of the invention.

<Effects of the invention> As described above, this invention allows the rotating shaft of the wind direction changing blade to be slidably supported by a friction support member, and creates shape memory in the state in which the wind direction changing blade is slid so that the applied frictional force increases. This prevents the alloy spring from changing the wind direction, but allows the shape memory alloy spring to change the wind direction in other conditions, simplifying the configuration by omitting unnecessary moving parts. can,
With the simplification of the configuration, durability can be improved, and the operational force required to switch the state can be reduced, which is a unique practical effect.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing an embodiment of the wind direction changing device of this invention, Fig. 2A is a schematic diagram showing a state in which the wind direction is changed by manual operation, and Fig. 2B is a schematic diagram showing a state in which the wind direction is changed automatically. 3 to 5 are longitudinal cross-sectional views of main parts showing other embodiments, and FIG. 6 is a schematic diagram showing a conventional example. 21... Conditioned air discharge part, 26... Friction support member, 26a... Hole, 26b, 26c... Spherical recess, 26d... Knurled portion, 27... Shape memory alloy coil spring, 28... Wind direction change feather, 2
8a... Rotating shaft, 28b, 28c... Ball portion, 28
d...Lever for manual operation.

Claims (1)

[Claims for Utility Model Registration] 1. A wind direction changing blade 28 supported by a conditioned air discharge part 21 of an air conditioner, and a shape memory alloy spring 2 that applies rotational force in one direction to the wind direction changing blade 28.
7, and a friction support member that slidably supports the rotating shaft 28a of the wind direction changing blade 28 in the axial direction and provides a frictional force larger than the rotational biasing force of the shape memory alloy spring 27 when sliding in one direction. 26. A wind direction changing device for an air conditioner, comprising: 2. The wind direction changing device for an air conditioner according to claim 1, wherein the friction support member 26 supports only one rotating shaft 28a of the wind direction changing blade 28. 3. The rotating shaft 28a has bulges 28b, 28c having different outer diameters at predetermined positions, and the friction support member 26 has recesses 26b, 26c that engage with the bulges 28b, 28c. A wind direction changing device for an air conditioner according to claim 1 or 2 of the above-mentioned utility model registration claim. 4. Changing the wind direction of the air conditioner according to claim 1 or 2, wherein the friction support member 26 has a rotary shaft insertion hole 26a whose inner depth is formed with a small diameter. Device. 5 The friction support member 26 is inserted into the rotating shaft insertion hole 26 in which an inward knurled portion 26d is formed at a predetermined position.
The wind direction changing device for an air conditioner according to claim 1 or 2 of the utility model registration claim, which has the following features: a. 6. The air direction changing device for an air conditioner according to any one of claims 1 to 5 of the above-mentioned utility model registration claim, wherein the friction support member 26 is made of rubber. 7. The wind direction changing device for an air conditioner according to any one of claims 1 to 5, wherein the rotating shaft 28a has a lever 28d for manual operation at a predetermined position.