JPH081327B2 - Blowing distribution diffuser - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for diffusing air emitted from a blowout port of a vehicle air conditioner.

[Prior Art] Conventionally, for example, regarding the distribution of the air discharged from the air outlet of a vehicle air conditioner, the wind speed in the central portion of the air outlet is very high, and the wind speed around the air outlet is very low. Therefore, the vehicle occupant receives a spot-like air blow from the outlet,
I often felt uncomfortable.

Therefore, conventionally, as disclosed in Japanese Patent Laid-Open No. 61-86529, by narrowing the downstream side of the louver group of the air outlet or by arranging the louvers in parallel, a spot-like blowout or a diffused It has been proposed to arbitrarily select a random blowing.

[Problems to be Solved by the Invention] However, although the distribution of the air volume is diffused at the time of the diffused blowing as described above, there is a problem that it is difficult to make the distribution uniform.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a blowout distribution diffuser capable of uniformly diffusing a blowout distribution of blown air discharged from a blowout port of a vehicle air conditioner. is there.

[Means for Solving the Problems] In order to achieve the above object, the present invention is provided at an outlet of a vehicle air conditioner that discharges air into a vehicle interior and vibrates by changing an applied voltage. The technical means includes a piezoelectric vibrator and one or a plurality of diaphragms attached to one end of the piezoelectric vibrator and amplifying the vibration of the piezoelectric vibrator.

[Operation and Effect of the Invention] A piezoelectric vibrator provided with a vibration plate is provided at a blowout port for discharging blown air, and a voltage whose voltage value periodically changes, such as an alternating current, is applied to the piezoelectric vibrator. Then, the piezoelectric vibrator vibrates according to the cycle of the applied voltage value, and the vibrating plate amplifies and vibrates the vibration of the piezoelectric vibrator. When the piezoelectric vibrator is vibrated when the blown air is discharged from the air outlet, the direction of the discharged air is the vibration of the piezoelectric vibrator,
And diffused by the amplified vibration of the diaphragm.

That is, the air discharged from the air outlet can be diffused, and the flow velocity distribution of the air blown from the air outlet can be made uniform.

[Embodiment] Next, an embodiment in which the blowout distribution diffuser of the present invention is applied to a ventilator outlet of a vehicle air conditioner will be described with reference to the drawings.

1 to 4 show a first embodiment of the present invention, and FIGS. 1 and 2 are sectional views of a ventilator outlet 1. The ventilator outlet 1 is provided near the center of an instrument panel (not shown), and discharges temperature-controlled air in an air conditioner (not shown) toward the chest of the vehicle occupant.

As shown in FIG. 3, a ventilator grill 2 for arbitrarily designating the discharge direction of the air discharged from the ventilator outlet 1 is provided inside the ventilator outlet 1. The left and right ends of the ventilator grill 2 are rotatably provided in the duct 3 forming the air outlet 1, and are also interlocked with the wind improvement lower adjustment dial 4 provided next to the ventilator grill 2 to adjust the wind direction. By operating the vertical adjustment dial 4, the outlet of the ventilator grill 2 is provided so as to be vertically rotatable within a range of 25 °.

Inside the ventilator grill 2, as shown in FIG. 1, a plurality of stays 5 having a substantially V shape are provided. The stay 5 has an end portion rotatably supported by the upper wall and the lower wall of the ventilator grill 2, and supports an upstream end portion of the piezoelectric vibrating body 6 inside an intermediate portion thereof.

As shown in FIG. 4, the piezoelectric vibrating body 6 includes a piezoelectric bimorph 7 whose upstream side is held by the stay 5, and an attachment 8 which is attached to the downstream end of the piezoelectric bimorph 7.
The diaphragm 9 is held on the attachment 8 on the upstream side.

The piezoelectric bimorph 7 is an example of a piezoelectric vibrator, and includes lead zirconate titanate, lithium niobate, barium titanate,
Piezoelectric element made of quartz film, poly (Fucca vinylidene), etc.
It is formed by bonding both sides of a reinforcing plate made of Kovar or the like.

The attachment 8 is made of a lightweight, hard resin or the like that connects the piezoelectric bimorph 7 and the diaphragm 9, and as shown in FIG. 2, has a substantially doglegged shape, and two diaphragms 9 are attached to the attachment 8. It is provided to be.

The vibration plate 9 is made of a resin (for example, thin polystyrene) having light weight, heat resistance, toughness, and moderate elasticity, supported by the attachment 8 and tilted at 45 ° about the piezoelectric bimorph 7, respectively. The angle of the surface is about 90 °.

Similar to the stay 5, both ends of the piezoelectric vibrating body 6 are rotatably supported by the upper wall and the lower wall of the ventilator grill 2, and the vibration plate 9 is supported by the attachment 8 at an intermediate portion thereof. A dummy louver 10 is provided so that the angles of the surfaces thereof are about 90 °.

The plurality of stays 5 and the dummy louver 10 are connected via a link 11. This link 11 is a wind direction left / right adjustment dial 12 provided at the outlet of the ventilator grill 2.
The piezoelectric vibrating body 6 and the dummy louver 10 are arranged horizontally by, for example, 40 ° left and right from the center by operating the wind direction left / right adjustment dial 12. There is.

 Next, the operation of the above embodiment will be described.

The apparatus is activated by applying a cyclically changing voltage, for example, alternating current of 150 V and 60 Hz to the piezoelectric bimorph 7 of the piezoelectric vibrating body 6. Then, the piezoelectric bimorph 7
Since the upstream side is supported by the ventilator grill 2 via the stay 5, the downstream end vibrates in the vertical direction 60 times per second.

This vertical vibration is transmitted to the diaphragm 9 via the attachment 8. Since the diaphragm 9 has elasticity, the vibration at the free end on the downstream side becomes considerably large. At this time, the diaphragm 9 and the surface of the piezoelectric bimorph 7 are each 45 °.
Since it is attached so as to be inclined, the direction of the amplitude transmitted to the diaphragm 9 is converted by 45 °, and the two diaphragms 9 of the piezoelectric vibrating body 6 vibrate in a phase shifted by 90 °.

That is, when an alternating current of 60 Hz is applied to the piezoelectric bimorph 7 of the piezoelectric vibrating body 6, the downstream end portions of the two vibrating plates 9 are 90 °.
It vibrates with a large amplitude 60 times per second with the phases shifted. Therefore, when the air conditioner discharges air from the ventilator outlet 1, the air flow passing between the vibrating plates 9 is changed in the vertical and horizontal directions 120 times per second. The air discharged from the ventilator grill 2 is diffused and has a nearly uniform wind velocity distribution as shown by the solid line A in FIG.

On the other hand, when the air conditioner discharges air from the ventilator outlet 1, and when no AC is applied to the piezoelectric bimorph 7 of the piezoelectric vibrating body 6 (device stopped), the wind velocity distribution discharged from the ventilator grill 2 is As indicated by a broken line B in FIG. 5, the wind velocity in the central portion is high, and the wind velocity in the surroundings is low, showing a spot-like wind velocity distribution.

It should be noted that by rotating the wind improvement lower adjustment dial 4 in the vertical direction, the diaphragm 9 is passed through the ventilator grill 2.
Also, the inclination of the dummy louver 10 on the downstream side is changed in the vertical direction, so that the direction of the air discharged from the ventilator outlet 1 can be adjusted in the vertical direction. Further, by rotating the wind direction left / right adjustment dial 12 to the left / right, the downstream inclinations of the diaphragm 9 and the dummy louver 10 are changed to the left / right direction via the link 11, and the wind direction discharged from the ventilator outlet 1 is changed. Can be adjusted left and right.

According to this embodiment, by providing the surface of the diaphragm 9 at an angle of 90 °, the wind speed distribution discharged from the ventilator grill 2 can be made uniform in both the vertical and horizontal directions. Further, since one piezoelectric bimorph 7 is provided with the two vibrating plates 9, compared to providing one piezoelectric bimorph 7 with one vibrating plate 9, the weight and manufacturing cost are reduced. can do.

A second embodiment of the present invention is shown in FIGS. 6 and 7. Note that the same reference numerals as those in the above embodiment indicate the same functional objects.

In the piezoelectric vibrating body 6 of the present embodiment, the downstream end portion of the piezoelectric bimorph 7 is supported by the stay 5, and the attachment 8 is attached to the upstream end portion of the piezoelectric bimorph 7, and the link attached to the stay 5. By operating 11 with the wind direction adjusting dial (not shown), the stay 5 rotates and the diaphragm 9
Is provided so that the inclination on the downstream side can be changed in the left-right direction.

According to this embodiment, the length of the piezoelectric vibrating body 6 can be shortened as compared with the above embodiments.

 A third embodiment of the present invention is shown in FIGS.

In this embodiment, a piezoelectric vibrating body 6 is constructed by attaching a single vibrating plate 9 to an end portion of a single piezoelectric bimorph 7 via an attachment 8, and the end portion of the piezoelectric vibrating body 6 is substantially The stay 5 having a square shape is attached to the upper and lower two stages, and the wind velocity distribution discharged from the ventilator grill 2 is made uniform only in the left-right direction or in the left-right direction.

In addition, in this embodiment, the piezoelectric vibrating bodies 6 are provided in upper and lower two stages, but may be provided in one stage or a plurality of stages of three or more stages.

 FIG. 10 shows a fourth embodiment of the present invention.

In this embodiment, a plurality of vibrating plates 9 are attached to the ends of one piezoelectric bimorph 7 via an attachment 8 to form a piezoelectric vibrating body 6, and each vibrating plate 9 of the attachment 8 is held. A hole 13 for passing air is provided between them.

According to the present embodiment, the vibration generated by one piezoelectric bimorph 7 is not transmitted to one diaphragm 9 but is transmitted to a plurality of diaphragms 9, so that a relatively expensive piezoelectric bimorph 7 is formed. Since it is possible to vibrate a large number of diaphragms 9 while using a small amount, compared with the third embodiment,
It is possible to reduce the weight of the piezoelectric vibrating body 6 and reduce the manufacturing cost.

(Modification) In the above-described embodiment, an example in which the piezoelectric vibrating body is supported in the ventilator grill via the stay is shown. However, the piezoelectric vibrating body is directly supported in the ventilator grill without the stay, or the ventilator grill is supported. It may be supported at the air outlet.

Although the present invention is provided in the ventilator outlet of the vehicle air conditioner to diffuse the air discharged into the passenger compartment, the present invention is applied to the air outlet of the air conditioner for homes, buildings, and factories. Inventions may be provided.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention.
FIG. 1 is a side sectional view of a blowout distribution diffuser of the present invention provided at a ventilator outlet of a vehicle air conditioner, FIG. 2 is a top sectional view of a blowout distribution diffuser provided at a ventilator outlet, and FIG. A front view of a ventilator outlet, FIG. 4 is a perspective view of a piezoelectric vibrating body, FIG. 5 is a graph showing a wind speed distribution of air discharged from a ventilator grill, and FIG. 6 is an outlet showing a second embodiment of the present invention. FIG. 7 is a side sectional view of a distribution diffusion device, FIG. 7 is a perspective view of a piezoelectric vibrating body used in the second embodiment, and FIG. 8 is a side sectional view of a blowout distribution diffusion device showing a third embodiment of the present invention. FIG. 10 is a perspective view of the piezoelectric vibrating body used in the third embodiment, and FIG. 10 is a perspective view of the piezoelectric vibrating body showing the fourth embodiment. In the figure, 1 ... Ventilator outlet, 2 ... Ventilator grille, 6 ... Piezoelectric vibrating body, 7 ... Piezoelectric bimorph, 8 ... Attachment, 9 ... Vibration plate.

Continuation of the front page (56) References JP-A 61-21723 (JP, A) JP-A 62-276360 (JP, A) JP-A 62-276361 (JP, A)

Claims (1)

[Claims] 1. A piezoelectric vibrator provided at an outlet of an air conditioner for a vehicle that discharges air into a passenger compartment, and vibrates by changing an applied voltage; and a piezoelectric vibrator attached to one end of the piezoelectric vibrator. A blowout distribution diffuser comprising one or a plurality of diaphragms for amplifying the vibration of the piezoelectric vibrator.