JP2805673B2 - Floor surface blowing device and double floor panel provided with the same - 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 blowing device for use in a floor blowing type individual air conditioner in which an air supply path for air conditioning is provided under the floor of a room forming an indoor space, and a double blower equipped with the same. For floor panels.

[0002]

2. Description of the Related Art Recently, with the progress of OA, intelligent buildings and the like adopt so-called double floors, free access floors, floating floors, etc. so that a space can be formed under the floor and wiring can be carried out vertically and horizontally. Is the mainstream.
In addition, the underfloor space is used as a supply path for air-conditioning air, and conditioned air is supplied from an outdoor air conditioner, and is discharged into a room from a horizontal plane outlet provided at a predetermined position on the floor surface to perform indoor air conditioning. Air conditioning methods are also becoming the mainstream of building air conditioning.

Conventionally, this air conditioning method can be roughly classified into two methods, one of which is as described in Japanese Utility Model Laid-Open Publication No. 2-44637. This is a method of controlling the air volume by controlling the opening ratio of a plurality of horizontal plane outlets provided at positions (hereinafter, abbreviated as a pressure type). Another is disclosed in Japanese Patent Application Laid-Open No. 4-28934.
As described in Japanese Unexamined Patent Application Publication No. Hei 4-36544, the air blown from the air conditioner is blown into the room by a fan provided at a predetermined position below the floor. This is a method of controlling the amount of air blown into the room from the outlet (hereinafter, abbreviated as a fan type).

[0004]

Among the conventional under-floor air-conditioning methods, the pressure-type air-conditioning method has a low facility cost, but the air flow is limited by the air-conditioner, and when the underfloor static pressure is increased, the gap between the double-floor panels is increased. +5 mmAq is the limit due to the increase in leakage from the room, and it is not possible to obtain the desired air-conditioning conditions according to the arrangement of individual workers and OA equipment in the room, that is, personalization of the indoor air-conditioning is insufficient, The control of the opening ratio of the air outlets had to be performed all the way to the location and performed individually, and remote control was not possible. On the other hand, in the fan type, the underfloor static pressure can be set to ± 0 mmAq, so there is no need to worry about leakage from the gap between the double floor panels. However, there has been a problem that a control device for controlling the rotation of the fan must be provided individually, and that the capacity of the fan needs to be increased, and the equipment cost and the operating cost increase. An object of the present invention is to provide a floor blowing device which can completely personalize indoor air conditioning, can be remotely operated, has low facility costs and operating costs, and has a high degree of freedom in changing indoor air conditioning conditions. The purpose is to obtain a double floor panel with a.

[0005]

In order to achieve the above-mentioned object, the present invention provides a plate-shaped horizontal lid having a plurality of horizontal air outlets formed therein, and a cylindrical side wall having an equal pitch on the side wall below the outer periphery of the horizontal lid. A slit casing in which a slit is formed and a circular horizontal surface suction port is formed in the center of the bottom surface is provided, and a slit damper in which a cylindrical slit having the same pitch as the slit is formed in a side wall inside the slit casing is formed. A unit fan that is movably provided, is mounted on the fan casing with its axis aligned on the horizontal suction port, and is fixed on the bottom surface of the slit casing, and an upper end formed on an extension above a cylindrical inner wall of the fan casing. A backflow prevention cover forming a cylindrical side wall with a gap between the lower surface of the horizontal lid and the unit fan provided inside the backflow prevention cover. A fan damper composed of a number of fan-shaped plate-shaped pieces, and a slit damper and an adjusting shaft interlocking with the fan damper at the center of the horizontal surface lid, wherein the height of the backflow prevention cover from the bottom of the slit casing is smaller than that of the slit casing. This has been solved by a floor surface blowing device higher than the height of the slit casing bottom surface.
In the floor surface blowing device, the upper part of the slit damper is preferably a truncated cone. Further, the problem was solved by a double floor panel provided with the floor surface blowing device.

[0006]

With the above construction, by using the floor surface blowing device of the present invention and the double floor panel provided with the same, the conditioned air from the air conditioner flows under the floor of the floor constituting the indoor space, and the slit casing and Through two routes, a route (first route) from each vertical suction port formed by the slit on the side wall of the slit damper and a route (second route) from each horizontal suction port through the unit fan, the floor surface It can be discharged into the room from each horizontal plane outlet provided at a predetermined position. At that time, control of opening ratio of vertical suction port, control of on / off operation of unit fan, control of opening ratio of fan damper, and prevention of backflow so as to obtain desired air-conditioning conditions according to the arrangement of each worker and OA equipment in the room The combination with the action of the cover makes it possible to control the amount of air discharged into the room over a wide range, and the personalization and remote control of indoor air conditioning can be performed efficiently. Here, the backflow prevention cover has a side wall whose height from the bottom of the slit casing is higher than the height of the slit.
It is considered that the ejector effect by the flow of the route acts to accelerate the flow of the first route. Further, by making the upper part of the slit damper a truncated cone, a more effective rectifying action is generated for the flow of the first route.

[0007]

An embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a plan view of the floor blowing device 13 according to the embodiment of the present invention, and FIG. 3 is a floor blowing device 13 according to the embodiment of the present invention.
FIG. 4 is a sectional view taken along the line EE of the floor blowing device 13 according to the embodiment of the present invention. A normal rectangular slit casing holder 11 is fitted to a floor surface blower support member 22 having a protruding portion inside the notch along the normal rectangular notch provided in the double floor panel 6. The center of the slit casing holder 11 is generally provided with a circular opening, a horizontal plane outlet 23 comprising a plurality of radial slits, and a slit damper adjusting shaft 8 at the center.
And a horizontal lid 7 provided with a fan damper adjusting shaft 9. The shape of the horizontal plane outlet 23 does not necessarily have to be a radial slit, and it is sufficient that slits and openings are provided evenly throughout the horizontal plane lid 7 so that the blown air is evenly dispersed. Is also good.
The slit casing holder 11 and the horizontal lid 7 do not necessarily have to be separate bodies, but may be integrated. In this case, the outer shape of the horizontal lid 7 can be matched with the normal square notch provided in the double floor panel 6. is necessary.

A slit casing 10 having a cylindrical side wall and a circular horizontal plane suction port 17 formed in the bottom surface is fixed to the lower surface of the slit casing holder 11. The slit casing 10 has a longitudinal vertical length h on the side wall,
A rectangular slit having a circumferential width f and an equal pitch is formed. A slit damper 4 having an upper truncated cone-shaped lower cylindrical shape inside the slit casing 10 and a slit of the same size and pitch as the slit of the slit casing 10 formed in the side wall.
Is inserted so that it can slide. Slit damper 4
A slit damper support member 5 connected to the slit damper adjusting shaft 8 is provided in a cross shape at the upper part of the upper part of FIG. Note that the shape of the slit is not limited to the square, and may be, for example, an elliptical shape, a shape having a rounded end at a rectangular end, or a shape in an oblique direction. Further, the slit damper 4 may be entirely cylindrical. A vertical suction port 25 is formed by slits of the same size on the side walls of the slit casing 10 and the slit damper 4, and the overlap of both slits is adjusted by turning the slit damper adjustment shaft 8 to make the opening ratio variable.

Horizontal plane suction port 1 of slit casing 10
7 and a generally square fan casing 12.
A backflow prevention cover 3 which is formed on an extension above the cylindrical inner wall of the fan casing 12 and has a gap between the lower end of the horizontal lid 7 and the cylindrical side wall, and a unit fan 1 incorporated therein. A fan damper 2 composed of a plurality of fan-shaped plate-like pieces is provided on the inside, and a fan damper adjusting shaft 9 is connected to the upper center of the overlap of the fan-shaped plate-like pieces. I have.

FIG. 5 shows a floor blowing device 1 according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line FF of FIG. Backflow prevention cover 3, the height k ₁ of the slit casing bottom, longitudinal vertical length of the height k ₂ and the slit of the slit of the side walls of the slit Ke Sing 10 and slit damper 4 to form a vertical surface suction port 25 The relationship of h is (a) k ₁ > k ₂ > h (b) k ₁ = k ₂ > h (c)
There are three cases of h ≦ k ₁ <k ₂ . In this (a)
There has been configured to have a case, the height k ₁ is the side wall higher than the height k ₂ of the slit of the slit casing bottom of the backflow prevention cover 3 of the present invention.

FIG. 1 is a schematic diagram showing an entire room air conditioner using a floor blowing device 13 according to an embodiment of the present invention.
An air conditioner outlet duct 16 connected to the air conditioner fan 15 outlet side of the outdoor air conditioner 14 is connected to an end of the underfloor space A of the floor constituting the indoor space B. In this drawing, the floor is spread over the entire floor surface with the underfloor space A being placed by supporting the double floor panel 6 having a fixed module by a support. Double floor panels 6 are usually made of cement, metal, silicon
It is made of plastic, etc., and has a smooth surface except for a wiring extraction device.
The floor blowing device 13 of the present invention is mounted at a predetermined position on the floor surface according to the arrangement of the OA equipment 8 and the OA equipment. In FIG. 1, the floor-surface blowout devices 13 are attached at equal intervals, but they can be arranged as appropriate in accordance with individual loads. Further, the ceiling 20 forming the indoor space B forms a space D above the ceiling that serves as a return air passage, and the ceiling 2
The room air suction port 19 is provided at a predetermined position 0 and is connected to the air conditioner suction side via an air conditioner suction duct 21 provided at the end of the space D above the ceiling. The air conditioner is provided with a fresh air intake (not shown) separately.
The indoor air inlet 19 may not necessarily be attached to the wall but to the ceiling 20.

Next, the operation of the entire room air conditioner will be sequentially described with reference to FIG. An air conditioner blow duct 1 connected to an air conditioner fan 15 blow side of an air conditioner 14 placed outdoors
From 6, conditioned air is introduced into the underfloor space A of the floor in the direction of arrow a. At the place where the floor blowing device 13 is installed in the double floor panel 6 laid all over the floor, the conditioned air is dispersed in the direction of the arrow b from the horizontal plane outlet 23 and discharged into the indoor space B, After exchanging heat with the cooling and heating loads of the individual workers 18 and the OA equipment in the room, the room air inlet 1 provided at a predetermined position of the ceiling 20 as return air.
In 9, the vehicle travels in the space D above the ceiling in the direction of arrow d from the direction of arrow c and returns to the air conditioner suction side via the air conditioner suction duct 21.
In addition, fresh air is separately introduced into the air conditioner from the intake port as appropriate. The indoor air inlet 19 is not necessarily the ceiling 20,
It may be mounted on a wall.

When the conditioned air from the air conditioner 14 is discharged into the room B from each horizontal plane outlet 23 provided at a predetermined position on the floor surface, the conditioned air flows through the underfloor space A of the floor and is routed from each vertical plane suction port 25. It passes through two routes, a (first route) and a route (second route) from each horizontal suction port 17 through the unit fan 1. In the first route, the aperture ratio is controlled by controlling the slit circumferential width f of the side wall of the slit damper 4 forming the vertical plane suction port 25 by rotating the slit damper adjusting shaft 8. In the second route, the opening ratio of the plurality of fan-shaped plate-shaped pieces of the fan damper 2 on the unit fan 1 is controlled by the rotation of the fan damper adjusting shaft 9, and the operation of the unit fan 1 is separately controlled. . In this case, it is preferable that the normal unit fan 1 performs on / off control and performs the control in combination with fine adjustment by controlling the aperture ratio of the fan damper 2. The on / off control of the unit fan 1 can be performed by remote control from an outdoor control center (not shown). In this case, in order to further personalize the indoor air conditioning, it is also possible to individually set conditions in accordance with the arrangement of each worker and the OA equipment.

FIG. 6 is a graph showing the relationship between the two-route air volume control and the horizontal air outlet 23 air volume. FIG. 7 shows the air volume control of the first route, the air volume blown out from the horizontal plane outlet 23, and the height k of the backflow prevention cover 3 from the bottom surface of the slit casing shown in FIGS. 5 (a), 5 (b) and 5 (c).
₁ and a slit casing 1 forming a vertical suction port 25
0 and the height k ₂ of the slit on the side wall of the slit damper 4
6 is a graph showing a relationship with the graph. That is, in FIG. 6, the vertical axis represents the blown air volume m ³ / min, and corresponds to the opening ratio (fully closed to fully open) of the slit damper 4 and the fan damper 2 and the on / off (run or stop) of the unit fan 1 on the horizontal axis. is there. In this case, the underfloor static pressure was +2 mmAq, and the air volume was measured based on AMCA Standard 210. As is apparent from this graph, according to an embodiment of the present invention, 3.2 m from the blowing air volume is 0m ³ / min ³ /
This indicates that control can be continuously performed over a wide range of min. FIG. 7 shows a case where the unit fan 1 is turned on by the same measuring method as in FIG.
³ / min, and the horizontal axis corresponds to the opening ratio of the slit damper 4; (a) k ₁ −k ₂ = 30 mm (b) k ₁ −
The case where k ₂ = 0 mm (c) is changed to k ₁ −k ₂ = −20 mm. As is clear from this graph, (a)
The case indicates that the air volume control can be reliably and continuously performed.

[0015]

By using the floor surface blowing device of the present invention and the floor panel provided with the same for indoor air-conditioning, in addition to the air volume control by the pressure type and the fan type, the function of the backflow prevention cover is combined to provide a wide range continuous operation. The air conditioning can be controlled more quickly, and the room air conditioning can be more completely personalized to obtain desired air conditioning conditions according to the arrangement of the individual workers and OA equipment in the room. In addition, since no special control device is required for controlling the rotation of the unit fan, the capacity of the fan can be reduced, and the air volume can be controlled remotely and from the floor surface, so that the facility and operation costs can be reduced. Further, the degree of freedom in changing the indoor air-conditioning condition by changing the arrangement of the double floor panels can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the entirety of indoor air conditioning using a floor blowing device according to an embodiment of the present invention.

FIG. 2 is a plan view of the floor blowing device according to the embodiment of the present invention.

FIG. 3 is a sectional view taken along line FF of the floor surface blowing device according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along the line E-E of the floor surface blowing device according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line FF showing the relative height of the backflow prevention cover in the floor surface blowing device according to the embodiment of the present invention.

FIG. 6 is a graph showing a relationship between air volume control and a horizontal plane outlet air volume.

FIG. 7 is a graph showing the relationship between the air volume control, the horizontal air outlet air volume, and the height of the backflow prevention cover shown in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Unit fan 2 Fan damper 3 Backflow prevention cover 4 Slit damper 5 Slit damper support material 6 Double floor panel 7 Horizontal surface lid 8 Slit damper adjustment shaft 9 Fan damper adjustment shaft 10 Slit casing 11 Slit casing holder 12 Fan casing 13 Floor blowing Device 14 Air conditioner 15 Air conditioner fan 16 Air conditioner outlet duct 17 Horizontal inlet 18 Worker 19 Indoor air inlet 20 Ceiling 21 Air conditioner inlet duct 22 Floor outlet support material 23 Horizontal outlet 25 Vertical inlet A Under floor Space B Indoor space D Ceiling space a, b, c, d Air movement direction f Slit circumferential width h Slit longitudinal vertical length k ₁ Height of backflow prevention cover from slit casing bottom surface k ₂ Slit slit casing bottom Height of more

Claims (3)

(57) [Claims] 1. A plate-shaped horizontal lid (7) having a horizontal air outlet (23) formed therein, and a cylindrical slit at an equal pitch in a side wall provided below an outer periphery of the horizontal lid (7) to form a central portion of a bottom surface. A slit casing (10) in which a circular horizontal plane suction port (17) is formed, and a slit damper (in which a slit having a cylindrical shape and the same pitch as the slit on the side wall is formed inside the slit casing (10)). 4) a unit fan (1) which is slidably provided, is fitted in the fan casing (12) with its axis aligned on the horizontal suction port (17), and is fixed on the bottom surface of the slit casing (10). A backflow prevention cover (3) formed on an extension above the cylindrical inner wall of the fan casing (12) and having an upper end formed with a gap between the lower surface of the horizontal lid (7) and a cylindrical side wall; A fan damper (2) consisting of a plurality of fan-shaped plate-shaped pieces provided on the unit fan (1) inside the prevention cover (3), a slit damper (4) and a fan damper in the center of the horizontal lid (7) Adjusting shafts (8, 9) interlocked with (2), wherein the height (k ₁ ) of the backflow prevention cover (3) from the bottom surface of the slit casing (10) is lower than that of the slit casing (10). A floor surface blowing device characterized by being higher than the height (k ₂ ) from the bottom surface. 2. The floor blowing device according to claim 1, wherein the upper portion of the slit damper is truncated cone. 3. A double floor panel comprising the floor blowing device (13) according to claim 1.