JPH0657933A - Free access floor - Google Patents

Abstract

PURPOSE:To improve a heating effect by installing a plurality of projecting fins for dissipating heat onto the underside of a floor panel with support legs and a heating element and a heat transfer plate, laying the floor panel while a grill is mounted onto the whole surface of the floor of a room and heating the whole room together with partial floor heating. CONSTITUTION:A plurality of fins 59A, 59B for dissipating heat having the different quantities of projecting are set up onto the underside of a floor panel 51 constituting a free access floor 5 and having heat transfer plates 57 having heating elements. The floor panels 51 are laid while a blow-off grill 7 and a suction grill 8 are installed onto the whole surface of the floor of a room. Partial floor heating is conducted while warm air in underfloor spaces 6 is circulated, thus heating the whole room. Accordingly, heating can be performed efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a free access floor used in an air-conditioning system for simultaneously performing local floor heating and efficient indoor heating in a computer room, a work room or the like.

[0002]

2. Description of the Related Art Conventionally, in a computer room, a work room connected to a computer room, or the like, a free access floor is provided on a floor slab of a building, and a computer using the underfloor space formed by the floor slab and the free access floor is used. It is used to pass equipment related cables. On the other hand, when operating a computer in the office, warm air heating by a ceiling duct is generally performed as a heating means especially in winter. However, in this warm air heating, the temperature in the upper part of the room rises, but since warm air does not stay near the floor, there is a problem that the vicinity of the feet does not heat. There is also a floor heating system that heats the floor surface or the entire floor slab by using heating elements such as hot water pipes and heater wires, but this is uneconomical because it heats up to unnecessary places, resulting in large heat loss. Not only that, but there was the problem that the structure became complicated. On the other hand, recently, a free access floor where an electric heating element is attached to or embedded in the upper part of the floor panel and the floor panel is laid only at a desired portion to locally heat the floor. Is actually Kaihei 4-41028
It has been proposed in the issue. In addition to using such a floor panel, an air conditioning system that blows air heated by an air conditioner into the underfloor space, while blowing out this warm air from the blowout grill provided on the floor panel to heat the room It is proposed in No. 3-27530.

[0003]

By the way, a vinyl tile or a carpet is usually laid and used on the above free access floor. Therefore, even in the case of local floor heating, the heat radiation to the underfloor space is larger than the heat radiation to the floor, which is not preferable. For this reason, the heat insulating material is laid on the floor slab, or the heat insulating material is directly attached to the lower surface of the floor panel. It is also possible to use a heat insulating material for the floor panel to prevent the heat radiation to the bottom of the floor as much as possible. However, in these cases, the heat generated in the floor panel itself varies, and the heat is trapped in the floor panel, which significantly shortens the life of the heating element such as the heating wire, and sufficiently reduces the input energy from the heating element. There is a problem that it cannot be used effectively. Even in such floor heating, the air in contact with the upper surface of the floor panel is warmed, and as it rises, cold air is convected to the floor panel surface and is also warmed. By this circulation, it is possible to gradually warm the entire air in the room to perform indoor heating, but when considering heating the entire room, there is a problem that this natural convection alone takes too much time. From the above,
The former one of the above-mentioned conventional techniques is suitable in terms of heating the feet, that is, zoning heating, but is not efficient in terms of adjusting the sensible temperature, that is, in terms of warming and air conditioning the air in the entire room. Not suitable. This is especially true when heat is radiated to the underfloor space of the free access floor as described above. On the other hand, in the latter prior art described above, the air heated by the air conditioner and the heat radiation from the bottom surface of the panel are supplied together into the room, which is good in terms of heating efficiency. Since the underfloor space is constantly filled with heat, it may cause a failure such as abnormal temperature rise of the electric heating element equipped on the floor panel. Further, since the air conditioner is provided, the equipment becomes expensive. The present invention has been made in view of the above problems, and reverses the convection of room air and the heat radiation to the underfloor space of the floor panel when heating the room at the same time as the local floor heating. The purpose is to provide a free access floor that enables an extremely inexpensive and economical air conditioning system by actively utilizing it.

[0004]

SUMMARY OF THE INVENTION The present invention is a free access floor comprising a support leg and a floor panel installed on a floor surface, and an underfloor space is defined between the floor surface and the floor panel. The panel is a free access floor made of a metal having a high thermal conductivity, and a heating element is provided on an upper portion of the floor panel and a radiation fin is provided on a lower surface thereof.

[0005]

The free access floor of the present invention is intended to increase the amount of heat radiation to the underfloor space side while allowing local floor heating by the heat of the heating element provided on the upper part of the floor panel. Is characterized by. That is, the floor panel is made of metal with high heat conduction, uniform heating of the entire panel is achieved, and the strength of the floor material is not only facilitated by the function of the protruding fins provided on the lower surface, but also the underfloor space By radiating heat to the side positively, this heat can be returned to the room and effectively used as heat energy for heating. Moreover, since the heat dissipation fins are provided, the heat capacity of the panel can be reduced, so that the thermal responsiveness can be improved and the rapid heating property at the initial stage of energization is excellent. Then, the room and the underfloor space are communicated with each other by the intake grill and the blowing grille, the convection in the room is taken into the underfloor space, and the cold air in the room and the warm air under the floor can be heat-exchanged to efficiently heat the room. is there. As described above, heat that is efficiently dissipated by the protruding fins on the bottom surface of the floor panel with different protrusion amounts is constantly radiated by air convection to the underfloor space, so heat should be trapped in the underfloor space. On the contrary, since heat radiation to the floor slab surface is reduced, heat insulating material is not necessarily required, the heat efficiency of the heating element is increased, and expensive equipment is not required, so an inexpensive air conditioning system can be constructed. It is a free access floor.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a free access floor of the present invention, and FIG. 2 is a perspective view showing this structure. The free access floor 5 is basically a floor panel 51 and supporting legs 4.
It does not matter whether these are one body or separate bodies.
The floor panel 51 is made of aluminum alloy with high heat conductivity, etc. 45
The size is 0 mm square. On the upper surface of the floor panel, recessed grooves 52 for fitting the heating elements 53 are formed in parallel over a plurality of lines. Further, a plurality of fins 59A and 59B having different protrusion amounts are arranged on the lower surface of the floor panel. The heating element 53 is composed of a heating wire 54 coated with a synthetic resin material such as a cord heater, a support material 55 such as a metal plate such as an aluminum plate or a transparent resin plate material, and a power cord 56. The heating wire 54 of the heating element 53 is formed by adhering or welding to the support material 55 in the same shape so as to fit exactly in the groove 52 formed in the floor panel 51. Thus, the work of inserting the heating element 53 into the concave groove 52 is simplified and the efficiency is improved. In addition, if at least two through holes are formed in the groove, it is possible to check whether the heating wire 54 is inserted correctly from the bottom surface, and at the same time,
If there is a water spill, it can be quickly drained under the floor to prevent leakage from heating wires. Heating element in this way
53 is securely fixed to the upper surface of the floor panel, on which a heat transfer plate 57 for protection and heat transfer is placed, and a carpet 58 is laid on the heat transfer plate 57. Reference numeral 11 is a safety device that shuts off the power when the temperature rises abnormally. The heat radiation fins 59A and 59B have different protrusion amounts. This takes into consideration the heat dissipation area, strength, and ease of manufacturing in manufacturing. The shape of the fin, the amount of protrusion, and the like can be appropriately selected. The function of the fins allows sufficient mechanical strength to be obtained even if the thickness of the panel is reduced, so the heat capacity can be reduced, improving the thermal response,
In particular, it is expected that the rapid heating property at the beginning of energization will be greatly improved. Further, since the heat radiation to the underfloor space side is positively performed, partial abnormal heating or abnormal temperature rise is unlikely to occur.

Next, an air conditioning system using the free access floor of the present invention will be described. FIG. 3 is a conceptual cross-sectional view for explaining an air conditioning system using the free access floor of the present invention, taking a computer office as an example. FIG. 4 is a perspective view of a part of this chamber. In the figure, 1 is an office, 2 is a floor slab, and 3 is a heat insulating material. In this example, the heat insulating material is provided, but at least it is not necessary to provide a high quality material as in the conventional case. Reference numeral 4 denotes a plurality of support legs installed on the floor slab, and a free access floor 5 is supported on the support legs 4 and is spread over the whole. Reference numeral 6 denotes an underfloor space formed between the free access floor 5 and the floor slab 2, in which cables for computer-related equipment and the like are wired, but in the present invention, it becomes a room for warming air, It also serves as an air circulation path. Reference numeral 7 is a blowing grill provided at an appropriate position on the free access floor 5 and has a blower fan 9 installed therein. Further, a plurality of these may be arranged at appropriate places, or a louver may be provided so that the wind direction and the like can be arbitrarily adjusted. Reference numeral 8 denotes an intake grill, which is provided at a place where a downflow of cool air is likely to occur in the room, for example, at a position near a window or an entrance / exit, and this may also be arranged at a plurality of places.

In the free access floor 5, the floor panel 51 can be removed separately, so that the floor panel 51 is spread at a place where heating of the feet is desired. Of course, this panel may be laid on the entire floor to heat the entire floor. Then, the power cord 56 is set in the wiring system in the underfloor space 6, and current is supplied from a commercial power source to heat the heating element. Since the floor panel 51 is made of an aluminum alloy, the heat conduction is good, the entire floor panel is uniformly heated, and effective floor heating can be performed with heat efficiency. The heat generated at this time is radiated to the upper and lower surfaces of the floor panel, but in the present invention, the fins provided on the lower surface positively increase the radiated heat to escape to the lower surface side. Therefore, the following indoor heating is carried out by effectively utilizing this heat. That is, when the floor panel 51 is heated, natural convection begins to occur in the room, and the cold air in the room becomes
As a downward flow, it is taken into the underfloor space 6 from an intake grill 8 provided in a place where cold air is likely to be generated even in the room, and spreads in this space to absorb the heat radiated from the lower surface of the floor panel to be warmed. After that, warm air is returned from the blowing grille 7 to the inside of the room and raised to circulate the convection. The blower fan 9 is operated at the same time as the panel heats up,
It is designed to facilitate convection in the room and circulate warm air to warm the room quickly and efficiently. By the above, floor heating of the floor panel upper surface can be performed at the same time as heating of the room.

[0009]

As described above, according to the present invention, the fins provided on the lower surface of the floor panel can improve the strength and thermal response of the floor material, and can positively radiate heat to the underfloor space. By effectively utilizing it, local floor heating and indoor heating can be simultaneously performed in a relatively short time. Further, since only the convection that occurs in the room is used, the structure is extremely simple, and heat is not trapped in the underfloor space, which is safe. Furthermore, it is a free access floor that can be economically and economically air-conditioned even when used with an air conditioner.

[Brief description of drawings]

FIG. 1 is a sectional view of a free access floor showing an embodiment of the present invention.

FIG. 2 is a perspective view illustrating the structure of the free access floor of FIG.

FIG. 3 is a schematic cross-sectional view of a work room or the like using the free access floor of the present invention.

FIG. 4 is a perspective view of the free access floor of FIG.

[Explanation of symbols]

 1 ... Office 2 ... Floor slab 3 ... Insulation 4 ... Support leg 5 ... Free access floor 6 ... Underfloor space 7 ... Blow grill 8 ... Blow grill 9 ... Blower fan 51 ... Floor panel 52 ... Groove 53 ... Heating element 54 ... Heating wire 55 ... Support material 56 ... Power cord 57 ... Heat transfer plate 58 ... Carpet 59 ... Projection fin

Front page continuation (72) Inventor Yu Kikuchi, 3-3 Shinjuyoji, Kashiwa-shi, Chiba, Japan 1 (72) Inventor Yoshihisa Ohue 1 3-2 Shinjyoji, Kashiwa, Chiba, Japan Within

Claims (3)

[Claims] 1. A free access floor, which is installed on a floor and comprises a support leg and a floor panel, and an underfloor space is defined between the floor and the floor panel, wherein the floor panel is a metal having a high thermal conductivity. The free access floor, which is made of metal and has a heating element provided on an upper portion of the floor panel and fins provided on a lower surface thereof. 2. The free access floor according to claim 1, wherein a plurality of fins having different projecting amounts are arranged as fins of the floor panel. 3. The free air according to claim 1, wherein at least one set of intake grills for taking the indoor air under the floor and at least one set of blowing grills for returning the air under the floor to the room are provided on at least the free access floor. Access floor.