JPH08121854A - Automatic wind-direction shifting device - Google Patents

Abstract

PURPOSE: To provide an automatic wind-direction shifting device which does not require power such as electric source and from which the optimum outlet angle can be obtained by outlet temperature. CONSTITUTION: An automatic wind direction shifting device comprises an outlet grille 5 having a plurality of fan-shaped inclined blades 4, a wind direction- shifting plate 3 having slits arranged in a radial manner, a plate stopper 8 for securing the wind direction shifting plate 3 in place, a spring 6 of shape- memory alloy connecting the outlet grille 5 and the wind direction-shifting plate 3 and a lower cylinder 1 for securing the outlet grille 5 and taking in the air to be conditioned. The spring 6 of shape-memory alloy expands and contracts responding to the temperatures of the air being conditioned to slide the wind direction-shifting plate 3. The optimum outlet angle can be set according to the temperatures of the air being conditioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet for switching the air flow direction in accordance with the temperature of the supply air in an underfloor air conditioner for supplying cold air or warm air from the floor to the room.

[0002]

2. Description of the Related Art In recent years, in intelligent offices, the floor has a double structure, and wiring for office automation equipment, communication cables, and the like are often wired in the double floor. This underfloor space is used to supply conditioned air such as cool air or warm air from the air conditioner into the double floor, and these air conditioned air is ejected into the room through the floor outlet formed on the floor surface to perform air conditioning. Floor air conditioning systems are rapidly becoming popular. When this system is used for air conditioning, the angle and diffusivity of the airflow from the floor outlet have a large effect on the thermal environment in the room.When cooling, the blowing angle is nearly vertical, and when heating, the angle is nearly horizontal. It is required to be able to adjust the blowout angle according to the blowout temperature, such as when the blowout is performed.

Conventionally, this type of wind direction switching mechanism has generally been constructed as shown in Japanese Patent Application Laid-Open Nos. 2-136645 and 4-36523.

[0004]

In such a conventional wind direction switching mechanism, the occupant has to perform the troublesome work of manually switching the wind direction of the blowout port attached to the floor surface. Further, since it is a troublesome work, there is a problem that the wind direction is not switched even if the operation mode is switched.

Further, there is a problem in that even if the switching is performed, the switching blades stop in a halfway state, and the air flow may not be blown out at the intended angle.

Further, there is a problem in that the wind direction switching device affects the air flow passing through the blowout grill to deteriorate the flow.

Further, when a switching mechanism using a motor is used, a power source for driving the motor is required,
There has been a problem that the number of parts has to be increased and the parts storage space has to be expanded accordingly.

Further, there is a problem that assembly becomes difficult due to the complicated structure and the price becomes expensive.

SUMMARY OF THE INVENTION The first object of the present invention is to solve the above-mentioned problems, and it is a first object of the present invention to switch the wind direction according to the supply air temperature without requiring a sensor or a power source.

A second object is to make the structure less likely to affect the air flow. The third purpose is to reliably switch the wind direction with a small force.

A fourth object is to reduce the number of parts and make the structure inexpensive. A fifth object is to simplify the structure and facilitate the assembly.

[0012]

A first means for achieving the first object of the present invention is to provide a circular blowout grill provided with a plurality of fan-shaped inclined blades radially from a central cylindrical portion, and the blowout. An airflow direction switching plate located upstream of the airflow on the lower side of the grill and having the same number of the inclined blades and radially arranged slits uniformly; and a plate stopper for fixing the airflow direction switching plate to the blowing grille. A shape memory alloy spring that connects the blowout grill and the wind direction switching plate, expands and contracts by detecting the temperature of air passing through the blowout grill, and a lower cylinder for fixing the blowout grill and taking in underfloor air. It is configured.

A second means for achieving the second object is the blow-out grill having a cutout portion in the central cylindrical portion, and a shape memory alloy spring support portion inserted in the cutout portion. And a shape memory alloy spring that connects the blowout grill and the wind direction switching plate.

A third means for achieving the third object comprises at least three or more rollers positioned at right angles to the cylindrical portion of the blowout grill and a support rod for supporting the rollers. It has a different structure.

A fourth means for achieving the fourth object is the blow-out grill provided with a plate supporting groove cut in the central cylindrical portion in the circumferential direction and the wind direction switching plate direction, In place of the shape memory alloy spring and the plate stopper, a shape memory alloy rod having a straight line portion and a curved portion and a shape memory alloy rod supporting hole located on the back surface of the wind direction switching plate are provided.

A fifth means for achieving the fifth object is to provide a cut groove instead of the shape memory alloy rod support hole on the back surface of the wind direction switching plate.

[0017]

According to the present invention, the structure of the first means described above causes the shape memory alloy spring to expand and contract depending on the temperature of the conditioned air, and the wind direction switching plate slides, so that the conditioned air passing through the blowout grill changes its angle and tilts the blade. Can be blown out indoors along.

Further, according to the constitution of the second means, since the shape memory alloy spring does not block the flow of the conditioned air, the conditioned air can pass through the wind direction switching plate without being disturbed.

Further, according to the structure of the third means, the roller rotates in the sliding direction of the wind direction switching plate about the support rod, reduces the frictional resistance in the sliding direction of the wind direction switching plate, and increases the strength of the shape memory alloy spring. The wind direction can be reliably switched without increasing.

Further, according to the structure of the fourth means, the shape memory alloy rod also serves as the fixing of the wind direction switching plate, so that the number of parts can be reduced.

Further, according to the constitution of the fifth means, the shape memory alloy rod is fitted in the plate supporting groove and the notch groove, and the wind direction switching plate can be easily slid and fixed to the blowout grill. is there.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

As shown in the figure, the conditioned air (not shown) entering from the opening 2 of the lower cylinder 1 changes its angle by the wind direction switching plate 3 and blows out along the fan-shaped inclined blades 4. The wind direction switching plate 3 and the outlet grill 5 are shape memory alloy springs 6.
The shape memory alloy spring 6 expands and contracts in response to the temperature of the conditioned air passing through the wind direction switching plate 3. Due to the expansion and contraction of the shape memory alloy spring 6, the wind direction switching plate 3 slides in the circumferential direction around the central cylindrical portion 7 of the blowout grill 5 to change the passage angle of the conditioned air. The wind direction switching plate 3 is provided with a plate stopper 8 and a central cylindrical portion 7
It is fixed to and does not move vertically.

With the above structure, for example, when cooling, the shape memory alloy spring 6 contracts, and the wind direction switching plate 3 is slid to the position where it overlaps the fan-shaped inclined blades 4, whereby the blowing angle of the conditioned air blown from the blowing grille 5 is close to vertical. For example, the shape memory alloy spring 6 extends during heating and slides in a direction in which the conditioned air passing through the blowout grill 5 is blocked, so that the blowout angle of the conditioned air blown out from the blowout grill 5 becomes nearly horizontal. You can

As described above, according to the automatic wind direction switching device of the first embodiment of the present invention, it is not necessary to manually switch the wind direction, and the wind direction is switched by the change of the conditioned air temperature which does not require a sensor or a power source. It can be performed.

As the shape of the shape memory alloy, any other shape such as a bellows shape and a dogleg shape can be used as long as it can expand and contract, and there is no difference in its function and effect.

Further, although the shape memory alloy spring that contracts during cooling and expands during heating is used, it goes without saying that the same effect can be obtained by using a shape memory alloy spring that expands during cooling and contracts during heating.

If it can expand and contract due to temperature change,
Even if another organic material is used instead of the shape memory alloy, there is no difference in the action and effect.

Next, the second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the drawing, the central cylindrical portion 7 of the blow-out grill 5 has a cutout portion 9, and the wind direction switching plate 3 is provided with a shape memory alloy spring support portion 10 at the center. The shape memory alloy spring support portion 10 is housed in the cutout portion 9 of the central cylindrical portion 7, and the cutout portion 9 and the shape memory alloy spring support portion 10 are connected by the shape memory alloy spring 6.

With the above structure, the conditioned air coming from the opening 2 of the lower cylinder 1 passes through the wind direction switching plate 3 without being disturbed by the shape memory alloy spring 6. The shape memory alloy spring 6 expands and contracts in response to the temperature of the conditioned air inside the lower cylinder 1. As the shape memory alloy spring 6 expands and contracts, the shape memory alloy spring supporting portion 10 is provided with a central cylindrical portion 7 of the blowing grill 5.
Slide in the notch 9 in. By sliding the shape memory alloy spring support portion 10, the wind direction switching plate 3 slides, and the blowing angle of the conditioned air can be changed.

As described above, according to the automatic wind direction switching device of the second embodiment of the present invention, the conditioned air passing through the wind direction switching plate is not disturbed by the shape memory alloy spring 6 in the room (not shown). Can be blown out to.

Next, the third embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The same parts as those in the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, at least three or more roller supporting rods 11 are attached to the central cylindrical portion 7 of the blow-out grill 5, and rollers 12 are attached to the roller supporting rods 11. The roller 12 rotates in the sliding direction of the wind direction switching plate 3.

With the above structure, the wind direction switching plate 3 that slides in accordance with the expansion and contraction of the shape memory alloy spring 6 is fixed in the vertical movement by the roller 12, and
Wind direction switching plate 3 when sliding by roller 12
The friction resistance of can be minimized.

As described above, according to the automatic wind direction switching device of the third embodiment of the present invention, the wind direction can be reliably switched without increasing the spring strength of the shape memory alloy spring 6.

If free rotation is possible, a spherical roller may be used instead of the roller, and there is no difference in the action and effect.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to FIG.

The same parts as those of the first, second and third embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the central cylindrical portion 7 of the blow-out grill 5 has a plate support groove 13 in the circumferential direction and the direction of the wind direction switching plate 3, and on the back surface of the wind direction switching plate 3 there is a shape memory alloy support hole 14. It is installed. The shape memory alloy rod 15 is composed of a curved portion 16 and a straight portion 17, and the curved portion 16 is fitted into the plate support groove 13 and the straight portion 17 is inserted into the shape memory alloy hole 14.

With the above structure, the shape memory alloy rod 15 changes the angle of the linear portion 17 according to the temperature change of the conditioned air passing through the wind direction switching plate 3, and slides the wind direction switching plate 3 to switch the blowing direction of the conditioned air. . Further, the shape memory alloy rod 15 can be fixed to the central cylindrical portion 7 of the blowout grill 5 so that the wind direction switching plate 3 does not move up and down.

As described above, according to the automatic wind direction switching device of the fourth embodiment of the present invention, since the shape memory alloy rod 15 serves both to switch the wind direction and to fix the wind direction switching plate 3, the plate stopper 8 is not required. Therefore, it is possible to reduce the number of parts and to provide an inexpensive automatic wind direction switching device.

Needless to say, the shape-memory alloy rod 15 has the same effect even if only the shape-changing portion is made of the shape-memory alloy.

Next, the fifth embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to FIG.

The same parts as those of the first, second, third and fourth embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, the central cylindrical portion 7 of the blow-out grill 5 has a plate support groove 13 in the circumferential direction and the direction of the wind direction switching plate 3, and the wind direction switching plate 3 has a linear cut groove 18 on the back surface. The shape memory alloy rod 15 is composed of a curved portion 16 and a linear portion 17, and the curved portion 1
6 is fitted in the plate support groove 13, and the linear portion 17 is fitted in a notch groove 18 formed on the back surface of the wind direction switching plate 3.

With the above structure, the wind direction switching plate 3 is fitted into the central cylindrical portion 7 of the blow-out grill 5 and the shape memory alloy rod 15 is fitted into the plate support groove 13 and the straight cut groove 18 to assemble the wind direction automatic switching device. You can

As described above, according to the automatic wind direction switching device of the fifth embodiment of the present invention, the structure can be simplified and the assembling can be facilitated without deteriorating the wind direction switching function.

If the shape of the cut groove 18 on the back surface of the wind direction switching plate 3 and the shape of the linear portion 17 of the shape memory alloy rod 15 are the same, it is not necessary to use a straight line, and another shape may be used. It goes without saying that there are similar effects.

[0050]

As is apparent from the above embodiments, according to the present invention, there is provided an automatic wind direction switching device capable of automatically switching the wind direction according to the supply air temperature without requiring a sensor or a power source. it can.

Further, it is possible to provide an automatic wind direction switching device that hardly affects the air flow of the conditioned air passing through the blowout grill.

Furthermore, it is possible to provide an automatic wind direction switching device which can reliably switch the wind direction with a small force.

Further, it is possible to provide an automatic wind direction switching device which has a small number of parts and is inexpensive. Further, it is possible to provide an automatic wind direction switching device which has a simple structure and is easy to assemble.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an automatic wind direction switching device according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a state during cooling of the first embodiment.

FIG. 3 is a partial cross-sectional view showing a state during heating of the first embodiment.

FIG. 4 is an explanatory diagram of an automatic wind direction switching device according to the second embodiment.

FIG. 5 is an explanatory view of an automatic wind direction switching device according to the third embodiment.

FIG. 6 is an explanatory diagram of an automatic wind direction switching device according to the fourth embodiment.

FIG. 7 is a partial assembly view of the fourth embodiment.

FIG. 8 is an explanatory diagram of an automatic wind direction switching device according to the fifth embodiment.

FIG. 9 is a partial assembly view of the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower cylinder 2 Opening part 3 Airflow direction switching plate 4 Fan-shaped inclined blade 5 Blowout grill 6 Shape memory alloy spring 7 Central cylindrical part 8 Plate stopper 9 Notch part 10 Shape memory alloy spring support part 11 Roller support rod 12 Roller 13 Plate support groove 14 Shape Memory Alloy Support Hole 15 Shape Memory Alloy Rod 16 Curved Part 17 Straight Part 18 Notch Groove

Claims (5)

[Claims] 1. A circular blowout grill provided with a plurality of fan-shaped inclined blades radially from a central cylindrical portion, and the same number of radial blades as the inclined blades, which is located upstream of the airflow below the blowout grill. Are evenly arranged, a plate stopper for fixing the wind direction switching plate to the blowout grill, the blowout grill and the wind direction switching plate are connected, and the air temperature passing through the blowout grill is controlled. An automatic wind direction switching device including a shape memory material that detects and expands and contracts, and a lower cylinder that fixes the blowout grill and takes in underfloor air. 2. A blowout grill having a cutout portion in a central cylindrical portion, a wind direction switching plate having a shape memory alloy spring support portion inserted into the cutout portion, the blowout grill and the wind direction switching plate. The automatic wind direction switching device according to claim 1, further comprising a shape memory material to be coupled. 3. The wind direction automatic switching device according to claim 1, further comprising at least three or more rollers positioned at right angles to the cylindrical portion of the blowout grill and a support rod supporting the rollers instead of the plate stopper. . 4. A blow-out grill having a plate support groove cut in the central cylindrical portion in the circumferential direction and in the direction of the wind direction switching plate, and a shape memory alloy spring and a plate stopper, instead of a straight line portion and a curved portion. The wind direction switching device according to claim 1, 2 or 3, further comprising a shape memory alloy rod and a shape memory alloy rod supporting hole located on a back surface of the wind direction switching plate. 5. A cut groove is provided on the back surface of the wind direction switching plate in place of the shape memory alloy rod support hole.
The automatic wind direction switching device described in 3 or 4.