JP3522533B2 - Floor outlet for underfloor air conditioning - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor outlet for use in an underfloor air conditioning system in which conditioned air is supplied into a double floor having a double floor structure and the supplied conditioned air is blown into a living room for air conditioning. It is about.

[0002]

2. Description of the Related Art Conventionally, as this type of floor outlet for underfloor air conditioning, one described in Japanese Patent Laid-Open No. 2-136644 is known.

The floor outlet for the underfloor air conditioning will be described below with reference to FIG.

As shown in the figure, the outlet 101 has a slit opening 10 whose cross-sectional shape facing the room is a diagonal straight line.
A round-shaped blowout grill part 10 in which 2A is radially formed
2 and a tubular portion 103 arranged below the blowing grill portion 102 and connected to the blowing grill portion 102.
03 is provided with a slit opening 103A along the circumference. This blowout port 101 is provided in several places on a floor panel (not shown) that constitutes the upper surface of the double floor, and slits are provided in the tubular portion 103 for the conditioned air 104 from the air conditioner flowing in the double floor. The slit opening 102 of the grill part 102 is made to flow in through the opening 103A.
A is used to swirl and blow out into the room.

[0005]

In such a conventional floor outlet for underfloor air conditioning, the cross section of the opening has an oblique straight line shape, and a separated flow is generated in the opening, resulting in a large pressure loss. Therefore, it is required to suppress the generation of the separated flow immediately after the blowing and reduce the pressure loss.

Further, the cross-sectional shape of the opening has the same outlet angle on the inner peripheral side and the outer peripheral side of the outlet, and since the inner peripheral side resistance is larger than the outer peripheral side resistance, the blowout airflow to the outer peripheral side is There is a problem that unevenness occurs, the wind velocity at the outer periphery increases, and the occupants feel a sense of airflow near the outlet. It is required not to give.

Further, there is a problem that the direction of the blown airflow cannot be changed between cooling and heating. The blowing direction can be changed between cooling and heating so that cool air can reach above the living area during cooling and during heating. It is required to blow warm air along the floor surface.

Further, the opening of the cylindrical portion is selected from either fully open or fully closed, and there is a problem that the air volume cannot be changed according to the situation of the indoor load, and depending on the load distribution situation. It is required to change the blowing air volume.

Further, since the outlet angle of the opening is constant, the direction of the blowout airflow cannot be changed between cooling and heating, and if the direction of the blowout airflow during heating is attempted, the pressure loss during heating will be reduced. There is a problem that it rises compared to the pressure loss at the time, and the blowing direction can be changed between cooling and heating,
It is required to suppress an increase in pressure loss during heating and reduce the difference in the air flow between the air conditioning and the air heating.

The present invention is to solve such a conventional problem, and can suppress the separation flow on the surface of the blade to reduce the pressure loss at the blowout port, and also lower the blowout wind speed to occupy the living space. It is possible to prevent the person from feeling the air flow, and to change the blowing direction during cooling and heating, and to change the blowing air volume according to the distribution of the air conditioning load in the room. The purpose is to provide a floor outlet for underfloor air conditioning that can reduce pressure loss during heating.

[0011]

[0012]

[0013]

Means for Solving the Problems Underfloor of the Invention
In order to achieve the above purpose, the floor outlet for air conditioning
The core line is a quadratic curve, and different blade outlet angles are given to the inner peripheral side and the outer peripheral side.

According to the present invention, the pressure loss at the outlet is
It is possible to obtain a floor outlet for underfloor air conditioning that can reduce the loss, reduce the air velocity on the outer peripheral side, and give no occupant a feeling of airflow.

Another means is to provide a blowing direction switching means. Further, according to the present invention, it is possible to obtain a floor outlet for underfloor air conditioning in which the setting of the outlet direction can be changed between cooling and heating.

Another means is that a plurality of dampers are provided as the air volume changing means. Further, according to the present invention, it is possible to obtain a floor outlet for underfloor air conditioning in which the amount of blown air can be adjusted according to the distribution state of the indoor load.

Another means is to divide a plurality of blades arranged, one of the divided blades is used as a fixed blade, and the other is moved.
It is a wing . Further, according to the present invention, it is possible to obtain an underfloor air conditioning floor outlet in which the blowing direction can be changed between cooling and heating, and pressure loss during heating can be reduced.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the blade center line is a quadratic curve as the shape of the blade, and the blade is different on the inner peripheral side and the outer peripheral side.
Are those given exit angle, Ki exits the flow of conditioned air in the vane back and ventral surface smoothly, it suppresses turbulence due to the formation of separated flow in the vane back, between the inner and outer circumferential sides
Uniform blowing air speed, blowing air speed from the outer peripheral side opening
Has the effect of reducing

[0019]

Further, the blowing direction switching means is provided, and it has an effect of changing the blowing airflow angle by the combined position of the blade and the blowing direction switching means.

Further, a plurality of dampers are provided as the air volume changing means, and it has an effect of changing the opening degree of the damper according to the situation of the indoor load.

Further, the blades are divided with respect to the direction of the blown airflow during heating , and one of the divided blades is used as a fixed blade and the other is divided.
Is a moving blade, and has an effect of suppressing the pressure loss during heating and changing the outlet airflow angle by the combined position of the divided blades.

Embodiments of the present invention will be described below with reference to the drawings.

[0024]

(Embodiment 1) The same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 and 2, the blade 5 has a blade height h at the blade center line 6, a blade inlet angle α and a blade outlet angle β of the conditioned air 104 (the blade outlet angle β is at the blade height h. It is defined as the tangent angle of the quadratic curve) and the wall thickness t. The blade inlet angle α is set to 90 degrees on the assumption that the conditioned air 104 flowing in the double floor flows vertically upward to the outlet 1, and the blade outlet angle β can be arbitrarily set as the outlet angle. The outlet 1 is provided with a slit 2 concentrically provided in the outlet 1 and has a defined blade 5
Thus, 16 sheets are radially arranged from the inner frame 3 of the outlet 1 to the outer frame 4 of the outlet 1 so as to partition the slit 2. As shown in FIGS. 3 and 4,
The vane 7 has a cross section A-B which is an outer peripheral side cross section of the outlet 1.
Blade height h at blade center line 8, blade inlet angle α and outer circumference
Blade sectional shape 7A consisting of side blade outlet angle 9 and wall thickness t
And the blade in the CD cross section which is the inner peripheral side cross section of the outlet 1.
Different from the core wire 10, the blade inlet angle α, and the outer peripheral blade outlet angle 9.
The blade outlet angle is now more horizontal than the outer blade outlet angle 9.
The inner-side blade outlet angle 11 and the wall thickness t are large.
Is defined by the blade cross-sectional shape 7B. Blowing out
The mouth 1 is equipped with a concentric slit 2 in the outlet 1.
Eh, so that the slit 2 is divided by the defined blade 7.
Release from the inner frame 3 of the outlet 1 to the outer frame 4 of the outlet 1.
It is configured by arranging 16 pieces in a radial pattern.

In the above structure, the conditioned air 104 flowing in the double floor flows into the blade 5 from below the outlet 1 at the blade inlet angle α, and enters the slit 2 partitioned by the back surface and the ventral surface of the blade 5. The air is blown into the room at a blowout airflow angle θ close to the blade outlet angle β while gradually changing the direction along the back surface and the abdominal surface of the blade 5. Here, when it is desired to match the blowout airflow angle θ with the blade outlet angle β to blow out, the straight line distance connecting the leading edge and the trailing edge of the blade 5 is defined as the blade length L, and the leading edge of the blade 5 and the next blade The blade interval p is the interval from the leading edge of 5 and the ratio p between the blade length L and the blade interval p.
If / L is set to p / L <1.0, it is possible to obtain the same outlet airflow angle θ as the blade outlet angle β. Flow in the double floor
The conditioned air 104 coming in is blown from the lower side of the outlet 1 to the blade 7
In contrast, the flow enters at the blade entrance angle α. Then feather 7
On the inner peripheral side of the inner peripheral side of the
The angle of rotation is large and the directional change of the conditioned air 104 due to the blades 7
Is reduced, the resistance on the inner peripheral side of outlet 1 is reduced, and
The adjusted air 104 is also easily blown out from the inner peripheral side of the outlet 1.
Become

As described above, since the conditioned air 104 is constantly in contact with the back surface and the abdominal surface of the blade 5 while passing through the slit 2, the direction can be changed smoothly, the separated flow is unlikely to occur, and the air flow is not disturbed. It is possible to blow out.
The conditioned air 104 passes through the outlet 1 and is blown into the room.
The pressure loss difference between the outer peripheral side and the inner peripheral side of the outlet 1 is
Since it becomes smaller, it suppresses the deviation of the blowout airflow to the outer peripheral side.
It is possible to reduce the blowing wind speed on the outer peripheral side of the outlet 1.
it can.

Although the blade inlet angle α is 90 degrees in the embodiment, it may be an arbitrary angle depending on the shape of the blade tip, and there is no difference in its function and effect. Further, although the number of blades forming the blowout port is set to 16, the number of blades may be increased or decreased, and there is no difference in the function and effect.

[0029]

[0030]

[0031]

[0032]

In the embodiment, the number of blades forming the blowout port is 16, but the number may be increased or decreased without any difference in the operation and effect.

[0034] (Example 2) In addition, the grant and the detailed description of the same reference numerals in the conventional example and the same parts as Embodiment 1 will be omitted.

As shown in FIGS. 5 and 6, the length on the reference circle 13 is 1/2 of the projected length of the blade 7, the length is an arc, and the center of the outlet 1 is the apex. Blades 7 radially arranged on the outlet 1 of the plate plate 14 of
The same number of blowout airflow direction switching plates 12 are provided below the blowout port 1 so as to be stacked.

In the above structure, as shown in FIG. 6 (a), the front edge of the blade 7 and the blade 2 forming the outlet 1 are set at the time of cooling.
The blowout airflow direction switching plates 12A and 12B are positioned so that their left sides are aligned with each other. At this time, the angle γ formed by the right side of the outlet airflow direction switching plate 12B and the trailing edge of the blade 7 is larger than the blade outlet angle set when the blade 7 is defined, and the angle formed with the horizontal plane is large. The conditioned air 104 that has flowed through the air blows toward the vertical. Further, as shown in FIG. 6 (b), at the time of heating, the leading edge of the blade 7 forming the outlet 1 and the right side of the outlet airflow direction switching plate 12A, the left side of the outlet airflow direction switching plate 12A, and the outlet airflow direction switching. Position the left side of the plate 12B so that it matches. At this time, the angle δ formed by the left side of the outlet airflow direction switching plate 12B and the trailing edge of the blade 7 is smaller than the blade outlet angle set when the blade 7 is defined, and the angle formed with the horizontal plane is smaller. The conditioned air 104 that has flowed through the air approaches the horizontal and is blown out.

As described above, when the conditioned air 104 passes through the outlet 1 and is blown out into the room, the blade 7 forming the outlet 1 and the outlet airflow direction switching plate 12 are combined so as to be brought close to the vertical direction during cooling. , It can blow out horizontally during heating.

In the embodiment, the plate is plate-shaped, but it may have another shape without any difference in its function and effect. Further, although the number of the blowing airflow direction switching plates is two, the number may be increased, and there is no difference in the function and effect.

( Third Embodiment) The same parts as those of the conventional example and the first and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in FIGS. 7 and 8, the lower cylinder 15 has a substantially fan-shaped bottom opening 1 with the bottom cylinder bottom center 16 as the apex on the bottom surface.
7 and the side surface has a rectangular side opening 18 on the extension of the bottom opening 17. Bottom opening 1 inside the lower cylinder 15
A substantially fan-shaped shield plate 19 having a size for closing 1/2 of 7 and a shield plate 20 for closing 1/2 of the side opening 18 are vertically provided in an arc portion outside the shield plate 19, and the shield plate 19 and the shield plate 20 are provided. A pair of air-flow adjusting dampers 21 symmetrically combined with the bottom cylinder bottom center 16 and a size that closes 1/2 of the bottom opening 17 inside the air-flow adjusting damper 21 and is smaller than the arc radius of the shielding plate 20. Shielding plate 22 having a circular arc radius and side opening 18
A shield plate 23 for closing 1/2 of the above is vertically provided in an arc portion of the shield plate 22, and a pair of the shield plate 22 and the shield plate 23 is configured to be an air volume adjustment damper 24 that is symmetrically combined with respect to the center 16 of the lower cylinder bottom surface. .

In the above structure, in a place where the indoor load is large, the left side of the air volume adjusting damper 21 and the left side of the air volume adjusting damper 24 are aligned with each other as shown in FIG.
Since the bottom surface opening 17 and the side surface opening 18 are all opened by storing the air conditioning air 104 in the unopened part, the conditioned air 104 flows into the lower cylinder 15 and blows out from the blowout port 1 to the room with 100% air volume. In a place where the indoor load is small, the area formed by the air volume adjusting damper 21 and the air volume adjusting damper 24 is changed with respect to the opening areas of the bottom opening 17 and the side opening 18, as shown in FIG. The air volume of the conditioned air 104 flowing into the inside 15 is adjusted and blown out into the room from the outlet 1. In a place with no indoor load, (c) of FIG.
As shown in, the air volume adjustment damper 21 and the air volume adjustment damper 24
Has a size that closes 1/2 of the bottom opening 17 and the side opening 18, so that if the left side of the air volume adjusting damper 21 and the right side of the air volume adjusting damper 24 are aligned, the bottom opening 1 of the lower cylinder 15
The opening areas of 7 and the side opening 18 are the air volume adjusting damper 21.
Therefore, it does not flow into the lower cylinder 15 of the conditioned air 104 flowing in the double floor and the air does not blow out from the blowout port 1 to the room.

By changing the area formed by the air volume adjusting damper 21 and the air volume adjusting damper 24 with respect to the opening areas of the bottom opening 17 and the side opening 18 of the lower cylinder 15 as described above, the opening ratio of the lower cylinder 15 is increased. The conditioned air 104 can be blown out into the room by adjusting the air volume according to the distribution of the indoor load.

In the embodiment, the bottom opening of the lower cylinder and the shape of the shielding plate that closes the bottom opening are substantially fan-shaped, but other shapes may be used as long as the shapes of the bottom opening and the shielding plate are similar. No difference in effect. Further, although the number of the air volume adjusting dampers is two, the number of the air amount adjusting dampers may be increased and there is no difference in the operation and effect.

[0044] (Example 4) In addition, the grant and the detailed description of the same reference numerals in the conventional example and the same parts as Embodiment 1 will be omitted.

As shown in FIGS. 9 and 10, the blade 26 has a blade height h at the blade center line 27, a blade inlet angle α and a blade outlet angle ε of the conditioned air 104 (the blade outlet angle ε is at the blade height h). It is defined as the tangent angle of the quadratic curve) and the wall thickness t. Considering that the conditioned air 104 flowing in the double floor is flowing vertically upward into the outlet 25, the blade inlet angle α is set to 90 degrees, and the blade outlet angle ε is the outlet angle and the outlet airflow during heating. Considering the direction, ε ≦ 15 degrees. This defined blade 26 is 1/2 of the blade height h
The blade 2 is divided horizontally so as to intersect the blade center line 27 at the height of
The auxiliary wing 26B has a front edge portion of 6. Outlet 25
Is the inner frame 3A of the outlet 25 so that the main wing 26A is fixed and the slits 28 concentrically provided in the outlet 25 are partitioned.
From the outlet 25, the fixed blades 29 radially arranged between the outer frames 4A of the outlet 25 and the auxiliary blades 26B are fixed, and the outlet 25
Between the inner frame 3B and the outer frame 4B of the outlet 25, there are 10 moving blades 30 radially arranged.

In the above structure, as shown in FIG. 10 (a), the main wing 2 arranged on the fixed wing portion 29 during heating.
6A and the auxiliary blade 26B arranged in the moving blade portion 30, the blade center line 27 has the shape of the blade 26 having a quadratic curve defined by the blade height h, the blade inlet angle α, and the blade outlet angle ε. The conditioned air 104 flowing through the inside of the heavy floor flows into the blades 26 from below the outlet 25 at the blade inlet angle α, and the inside of the slit 28 partitioned by the back surface and the abdominal surface of the blades 26 becomes the back surface and the abdominal surface of the blades 26. The airflow angle ζ is close to the blade outlet angle ε while gradually changing the direction, and the airflow approaches the horizontal direction and is blown out into the room.
As shown in (b) of FIG. 10, during cooling, the moving blades are arranged so that the leading edge of the main blade 26A arranged on the fixed blade portion 29 and the leading edge of the auxiliary blade 26B arranged on the moving blade portion 30 coincide with each other. The part 30 is moved in the circumferential direction of the outlet 25, and the auxiliary wing 26
By making the angle η between the leading edge of B and the trailing edge of the main wing 26A larger than the blade outlet angle ε, the conditioned air 104 passing through the slit 28 is made to approach the vertical direction and blow out into the room.

In this way, the direction of the blown airflow can be changed during cooling and during heating, and the conditioned air 104 passing through the slit 28 is always in contact with the ventral surface and the back surface of the blades 26 during heating, so that a separated flow is unlikely to occur. It is possible to blow out the airflow without disturbing it, and suppress an increase in pressure loss during heating.

Although the blade inlet angle α is 90 degrees in the embodiment, it may be an arbitrary angle depending on the shape of the blade tip, and there is no difference in its function and effect. Further, the number of blades forming the outlet is set to 10, but the number of blades may be increased or decreased, and there is no difference in the function and effect. Further, although the main wing having the blade trailing edge portion is the fixed wing portion and the auxiliary wing having the blade leading edge portion is the moving wing portion, the main wing may be the moving wing portion and the auxiliary wing may be the fixed wing portion. Make no difference. Further, although the blade is divided by ½ of the blade height, the division ratio may be changed and there is no difference in the function and effect.

[0049]

As is apparent from the above embodiments, according to the present invention, the pressure loss at the outlet is reduced and the blowout on the outer peripheral side is reduced.
The wind speed is reduced to give the occupants a sense of airflow.
It is possible to provide a floor outlet for underfloor air conditioning, which has the effect of reducing the number of floors.

[0050]

Further, it is possible to provide a floor outlet for underfloor air conditioning, which can change the blowing direction of the conditioned air during cooling and heating.

Further, it is possible to provide a floor outlet for underfloor air conditioning which can reduce the transportation power of the air conditioner.

Further, it is possible to provide a floor outlet for underfloor air conditioning, in which the difference in the amount of air blown out between cooling and heating is small.

[Brief description of drawings]

FIG. 1 is a perspective view of an underfloor air conditioning floor outlet according to a first embodiment of the present invention.

[Fig. 2] Detailed view of the same blade

FIG. 3 is a plan view of the A Ndafuroa air conditioning for the floor blow-out port

FIG. 4 is a detailed view of the same blade.

FIG. 5 is a perspective view of a floor outlet for underfloor air conditioning of the second embodiment.

FIG. 6 is a detailed view of the same blade

FIG. 7 is a perspective view of a floor outlet for underfloor air conditioning of the third embodiment.

FIG. 8 is a detailed view of the same blade.

FIG. 9 is a perspective view of a floor outlet for underfloor air conditioning of the fourth embodiment.

FIG. 10 is a detailed view of the same blade

FIG. 11 is a diagram showing a conventional floor outlet for underfloor air conditioning.

[Explanation of symbols]

2 slits 5 feathers 6 blade center line 7 feathers 9 Outer side blade outlet angle 11 Inner peripheral blade outlet angle 12 Air flow direction switching plate 15 Lower cylinder 16 Center of bottom surface of lower cylinder 17 Bottom opening 18 Side opening 19 Shield 20 Shield 21 Airflow adjustment damper 22 Shield 23 Shield version 24 Air volume adjustment damper 26 feathers 27 blade center line 28 slits

Claims (4)

(57) [Claims] 1. A plurality of slits and the slits are composed of a plurality of radially arranged blades, and the blade has a quadratic curve at its blade center line as a sectional shape of the blade.
Of the inner peripheral side blade outlet angle on the inner peripheral side of the outlet of
The angle is the outer blade exit angle on the outer peripheral side of the outlet of the blade.
It is characterized by making it larger than the angle made with the horizontal plane of degrees.
Under-floor air conditioning for the floor blow-out port to. 2. A method according to claim 1 Symbol mounting underfloor air conditioning floor blowout port with air flow direction switching means blowing the upstream side of the blade. 3. A tubular portion having an opening on a bottom surface and a side surface is provided on the upstream side of the outlet, and a plurality of opening shields are provided in the tubular portion as air volume varying means relative to the center of the tubular portion. with a shielding means for interlocking claim 1 or 2 underfloor air conditioning floor air outlet according. 4. A plurality of slits, the slits are configured vanes centerline disposed in a plurality of radial through blades to quadratic curve, dividing the blade so as to intersect the blade centerline, wherein One of the divided blades is a fixed blade
However, the floor outlet for air conditioning on the underfloor is characterized by using the other side as a moving wing .