JPH0682011B2 - 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 which are not affected by the imbalance between the air conditioner and the total air volume of the individual blower fans and the increase or relocation of the outlets. Another object of the present invention is to provide an air conditioner of the floor surface blowing type by the variable air volume control type.

<< Means for Solving the Problem >> In order to achieve the above object, a floor surface blowing type air conditioner of the present invention uses a floor space of a double floor as an air supply path of an air conditioner and blows on the floor surface. In an air conditioner having an outlet, a return air suction port is provided on or near the floor surface, and a mixer and a blower fan are arranged in series in the air supply passage, and the discharge port of the blower fan is While being connected to the air outlet, one of the inlets of the mixer is connected to the return air inlet and the other is exposed to the air supply passage through an opening / closing damper whose opening angle is variable,
Further, a temperature sensor provided in the room interlocks the opening angle of the damper with an opening that balances the set temperature, and, in the mixer, the intake port of the mixer and the return air intake port through the damper. A filter is obliquely defined between the other connected suction port and the air flow path.

<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 by the opening degree of the damper.

The room temperature can be controlled only by controlling the opening degree of the damper on the air supply side from the air conditioner using the suction resistance of the return air suction port on or near the floor surface. That is, when the damper on the air supply side is fully opened, the air supply pressurizes the air supply, and the conditioned air flows to the blower fan with almost no resistance. On the other hand, when the damper is fully open, room air that overcomes the resistance of the filter flows. Therefore, it is possible to easily control the amount of air supplied from the air conditioner by changing the wide angle of the damper while at the same time the filter on the side of the return air from the room is sufficient. In addition, the filter is slanted to make the mixer thinner, and the filter area is increased to control the increase in passage resistance.

«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
The other end is directly connected to the air supply passage 3a through a motor damper 16 whose opening and closing and opening angle can be adjusted.

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

Furthermore, a thermostat 17 is installed in the room 5 for the purpose of controlling the room temperature.
Change the damper angle of.

The right end of the inside of the mixer 15 is directly connected to the suction port 8 of the blower fan 7, and the suction ports are provided above and below and on the left end of the mixer 15. In the figure, the suction port on the upper left side is returned to the air suction port 12. Although it is directly connected, since it has flexibility in storage, an intake port 18 is also provided in the upper part, and here, the intake port 18a on the upper left side is used. A motor damper 16 is provided at the lower left suction port.

Then, the mixer 1 is provided between the suction port 18a and the outlet of the damper 16.
It is defined by filter 19 within 5.

The filter 19 is arranged obliquely above the outlet upper end edge of the damper 16 and above the discharge port of the mixer 15.

As a result, the mixer 15 is thin and the area of the filter 19 is as large as possible.

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. Since the mixer puts the filter diagonally, increase the area,
The passage resistance is low and the filtration effect is high.

The motor damper is economical because it uses the filter's passing resistance and only needs to supply air from the air conditioner.

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 1 13 …… Ceiling, 14 …… Intake port 15 …… Mixer, 16 …… Motor damper 17 …… Thermostat, 18 …… Inlet port 19 ... Filter

Claims (1)

[Claims] 1. An air conditioner having a double-floor floor space as an air supply path for an air conditioner, and an air outlet on the floor surface, wherein a return air suction port is provided on or near the floor surface, A mixer and a blower fan are arranged in series in the air supply path, the discharge port of the blower fan is connected to the blowout port, and one of the suction ports of the mixer is connected to the return air suction port. The other side is exposed to the air supply passage through an opening / closing damper with a variable opening angle.
Further, a temperature sensor provided inside the room interlocks the opening angle of the damper with an opening degree that balances the set temperature, and in the mixer, the intake port of the mixer and the return air intake port via the damper. A floor-blowing air conditioner characterized in that a space between the other suction port connected to the air conditioner and a suction port is obliquely defined with respect to an air flow path.