JPH0682010B2 - Floor blowing air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a floor blow-out type air conditioner that uses a free access floor or uses a floating floor or the like under the floor as a supply path for air conditioning air.

<< Prior Art >> FIG. 2 illustrates a conventional air conditioner in which an air supply passage 3 is formed between a floor slab 1 and a floor panel 2.

The air supply passage 3 is for sending the conditioned air from the down-blowing air conditioner 4 to the room 5, is piped from the air outlet of the down-blowing air conditioner 4 under the floor panel 2, and is intermittently provided at an appropriate separated position thereof. The discharge port 6 is provided as a target.

Further, a blower fan 7 is arranged below the floor panel 2, its suction port 8 is opened below the floor panel 2, and its discharge port 9 is directly connected to a blowout port 10 provided in the floor panel 2 by a duct 11. is doing.

Further, the floor panel 2 is provided with a return air suction port 12 for joining the air in the room 5 with the air supplied from the air supply passage 3.
On the other hand, the ceiling 13 is provided with an intake port 14 for returning the air in the room 5 to the downward blower air conditioner 4.

Warm indoor air sucked from the return air suction port 12 of the floor panel 2 and cold air supply from the downward air conditioner 4 are mixed in the blower fan 7, and the temperature is higher than the air supply temperature from the air supply passage 3 to some extent. Is raised to supply air from the outlet 10 to the room 5.

When supplying cool air from the surface of the floor panel 2, if it is blown out at a low temperature (for example, 16 ° C.) that blows out from the ceiling 13, the air in the room 5 and the air from the air supply passage 3 are mixed because the feet are too cold. I am doing it.

<< Problems to be Solved by the Invention >> That is, in the case of the floor blowing type, since the blowing temperature is increased, the difference between the retinal air temperature and the blowing air temperature is small,
It suffers from the drawback that the volume of air to be processed by a bottom blower air conditioner or the like becomes large. Therefore, in the above-mentioned conventional example, the air suction port 12 is provided on the floor panel 2 and the blower fan 7 is used for the air conditioner 4
By mixing with the supply air, the temperature is raised and the air is blown out by the blower fan 7 so that the amount of treated air in the air conditioner 4 can be reduced.

However, in order to keep the chamber temperature in the double floor constant, it is necessary to extend the discharge port 6 of the air supply passage 3 to the vicinity of the suction port 8 of each blower fan 7, which causes an obstacle to the cable laying under the floor panel 2 rear surface. Therefore, it was necessary to deepen the depth of the double floor.

Further, the total air volume of the blower fan 7 is made larger than the air volume of the down-blowing air conditioner 4 to secure the suction air volume from the return air suction port 12, but the blower fan 7 is stopped due to individual start / stop. When the number of the air conditioners increases, the air volume of the air conditioner 4 becomes larger than the total air volume of the fan 7, and as a result, there is an adverse effect that the excess air in the air supply passage 3 flows back from the return air suction port 12.

Furthermore, since the air supply amount is limited by the air supply passage 3, the flexibility to add or change the air outlet 10 is not effective.

The present invention has been made in view of the above circumstances, and its object is to eliminate the conventional drawbacks described above, which are not affected by the imbalance between the air conditioner and the total air volume of the individual blower fans or the increase or relocation of the air outlets. The present invention is to provide an air conditioner of the above-mentioned floor blowing type.

<< Means for Solving the Problem >> In order to achieve the above object, the floor-blowing type air conditioner of the present invention has an underfloor air-conditioning air supply passage, and an air-conditioning apparatus having a blowout port on the floor. In the device, a return air suction port is provided on the floor surface or in the vicinity thereof, and a mixer and a blower fan are arranged in series in the air supply passage, and a discharge port of the blower fan is connected to the blowout port. One of the suction ports of the mixer is connected to the return air suction port, and the other is exposed to the air supply passage through an air volume adjusting damper.

Further, in order to prevent air leakage when the blower fan is stopped, the opening and closing of the air volume adjustment damper is linked to the blower fan, and when the fan is stopped, it is fully closed. is there.

<Operation> A mixer is provided in front of the blower fan, and this mixer has a suction port directly connected to the return air suction port 12 and a suction port opened under the floor via an air volume adjusting damper, so that the air in the room is kept. The underfloor space itself can be used as the air supply passage without being formed and attached to the air supply passage at the same time without fail.

Further, it is possible to adjust the mixing ratio of the room air and the air supply from the air conditioner by selecting the opening ratio of the suction port of the mixer.

«Examples» Hereinafter, preferred examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 relates to an embodiment of the present invention, and the same components or devices as those of the conventional example use the same reference numerals.

The conditioned air of the air conditioner 4 is discharged and supplied into the space between the floor slab 1 and the floor panel 2, and the space under the floor itself is used as the air supply passage 3a.

The mixer 15 is arranged in series in front of the blower fan 7, that is, on the side of the suction port 8.

The mixer 15 has two inlets, one of which is the return air inlet 12
Is directly connected to the air supply passage 3a through a damper 16 whose opening and closing and opening angle can be adjusted.

The damper 16 is interlocked with the blower fan 7 and is in a fully closed state when the blower fan 7 is stopped.

The above-mentioned configuration is not limited to the floor blowing type, but in the case of the ceiling blowing type, the above ceiling space is used as the air supply passage in the same manner as the mixer,
It is also effective to configure a blower fan.

<< Effects >> As described above in detail, according to the floor-blowing type air conditioner of the present invention, the return air suction port is directly connected to the mixer, and only the air supply from the air conditioner is supplied under the floor. Since the air is sucked directly from the airway, the room air and the air supply from the air conditioner are mixed only inside the mixer. Therefore, since the temperature of the air supply passage can be kept constant, it is not necessary to arrange an air supply duct or the like, and the underfloor space can be widely used, and there is no restriction due to the duct cross-sectional area. ,
You can add more outlets on the floor.

Further, since the amount of air supplied from the air conditioner can be changed by adjusting the opening degree of the damper, variable air volume control is also possible.

Furthermore, when the blower fan and damper are interlocked and the damper is closed when the fan is stopped, the air supply pressure from the air conditioner side is returned and cut off from the air inlet and outlet, and these inlets or outlets are shut off. It has the effect of completely preventing air leaks.

[Brief description of drawings]

FIG. 1 is a side view showing a floor blowing type air conditioner according to the present invention, and FIG. 2 is a side view illustrating a conventional floor blowing type air conditioner. 1 ... Floor slab, 2 ... Floor panel 3 ... Air supply path, 4 ... Down-blowing air conditioner 5 ... Indoor, 6 ... Blowout port, 7 ... Blower fan, 8 ... Suction port, 9 ... Discharge port, 10 …… Blowout port 11 …… Duct, 12 …… Return air suction port 13 …… Ceiling, 14 …… Intake port 15 …… Mixer, 16 …… Damper

Claims (2)

[Claims] 1. An air conditioner having an underfloor air-conditioning air supply passage and an air outlet on the floor surface, which is provided with a return air suction opening on or near the floor surface, and is mixed in the air supply passage. The blower fan and the blower fan are arranged in series, the discharge port of the blower fan is connected to the blow-out port, one of the suction ports of the mixer is connected to the return air suction port, and the other is connected to the air volume adjusting damper. A floor-blowing air conditioner characterized in that it is exposed to the air supply passage after passing through. 2. The floor surface according to claim 1, wherein the air volume adjusting damper is opened and closed in conjunction with the blower fan and is fully closed when the fan is stopped. A blow-out type air conditioner.