JPH0289938A - Floor delivery type air conditioning device - Google Patents

Abstract

PURPOSE:To contrive a variable air capacity to successfuly cope with the imbalance in the total air delivery rate between the air conditioner and individual fans as well as the needs for adding or remodeling the air outlets by serially disposing a mixing unit and a fan in the feed air duct, using a particular construction for the internal piping of the mixing unit and its suction side piping, and disposing a temperature sensor in the room. CONSTITUTION:In an air conditioning device which utilizes under-the-floor space as a feed air duct for air conditioning and has air outlets in the floor, the conditioned air from an air conditioner 4 is discharged into the space between the floor slab 1 and the floor panel 2, making use of said space as a feed air duct 3a. A mixing unit 15 is serially connected to the inlet side 8 of a fan 7. There are two inlets for the mixing unit 15, one of which is connected to the return air inlet 12 via a duct and the other is open to the feed air duct 3a via a motorized damper 16 capable of opening or closing and adjusting the opening angle. The motorized damper 16 is interlocked with the fan 7, and is fully closed when the fan 7 stops. A thermostat 17 is installed in the room 5 so as to control the damper angle of the motorized damper 16. A filter 19 is diagonally installed in the mixing unit 15 to demarcate the inlet 18a from the outlet 16 of the damper 16.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a floor-blowing type air conditioner that uses a raised floor or a floating floor or the like and uses the underfloor area as a supply path for air conditioning.

(Prior Art) FIG. 2 shows an example of a conventional air conditioner, in which an air supply path 3 is formed between a floor slab 1 and a floor panel 2.

The air supply path 3 is for sending conditioned air from the bottom blowing air conditioner 4 into the room 5, and is piped from the air outlet of the bottom blowing air conditioner 4 under the floor panel 2. A discharge port 6 is arranged centrally.

Further, a blower fan 7 is disposed under the floor panel 2, and its suction port 8 is open under the floor panel 2, and its discharge port 9 is directly connected to an air outlet 10 provided in the floor panel 2 through a duct 11. are doing.

Further, the floor panel 2 is provided with a return air suction port 12 for making the air in the room 5 merge with the supply air from the air supply path 3. On the other hand, an intake port 14 is provided on the ceiling 13 to return air from the room 5 to the downward blowing air conditioner 4.

The warm indoor air sucked in from the return air suction port 12 of the floor panel 2 and the cold supply air from the downward air conditioner 4 are mixed in the ventilation fan 7, and the temperature is lowered to some extent than the temperature of the supply air from the supply air path 3. Air is supplied from the air outlet 10 to the indoor room 5 by increasing the amount of air.

When cold air is supplied from the surface of the floor panel 2, if it is blown out from the ceiling 13 at a low temperature (for example, 16°C), the feet will be too cold, so the air from the room 5 and the air from the air supply path 3 are mixed. That's what I'm doing.

(Problems to be Solved by the Invention) In other words, in the case of a floor blowing type, the blowing temperature is increased, so the difference between the retan air temperature and the blowing air temperature is small, and the air flow rate of a conditioner such as a bottom blowing air conditioner is reduced. It suffers from growing drawbacks. Therefore, in the conventional example described above, the floor panel 2
An air suction port 12 is provided to connect the air conditioner 4 with a blower fan 7.
By mixing the air with the supplied air, it is possible to raise the temperature and at the same time blow out the air with the blower fan 7, thereby making it possible to reduce the amount of air processed by the air conditioner 4.

However, in order to keep the chamber temperature constant in the double floor, it is necessary to extend the outlet 6 of the air supply path 3 to the vicinity of the inlet 8 of each blower fan 7, which poses an obstacle to laying cables under the back of the floor panel 2. Therefore, it was necessary to make the depth of the double floor deeper.

In addition, the total air volume of the blower fan 7 is greater than the air volume of the downward blowing air conditioner 4 to ensure the suction air volume from the return air suction port 12, but the blower fan 7 is stopped by starting and stopping individually. When the number of air conditioners increases, the air volume of the air conditioner 4 becomes larger than the total air volume of the fans 7, and as a result, the return air intake port 1
This has the disadvantage that excess air in the air supply path 3 flows backward from the air supply path 2.

Furthermore, since the amount of supplied air is limited by the air supply path 3, flexibility in adding or changing the air outlet 10 is not effective.

The present invention has been made in view of the above circumstances, and its purpose is to eliminate the disadvantages of the conventional art, which is not affected by the imbalance between the total air volume of the air conditioner and the individual blower fans or by the addition or modification of the air outlet. An object of the present invention is to provide a floor-blowing type air conditioner using a variable air volume control type.

(Means for Solving the Problems) In order to achieve the above object, the floor blowing type air conditioner of the present invention uses the floor space of the double floor as the air supply path of the air conditioner, and blows air into the floor surface. In an air conditioner having an outlet, a return air inlet is provided on or near the floor surface, a mixer and a blower fan are arranged in series in the air supply path, and the outlet of the blower fan is connected to the outlet. In addition to being connected to the air outlet, one of the inlets of the mixer is connected to the return air inlet, the other is exposed to the air supply path through an opening/closing damper with a variable opening angle, and is further provided indoors. A temperature sensor links the opening angle of the damper to an opening that is balanced to the set temperature, and in the mixer, the intake port of the mixer passing through the damper and the other intake connected to the return air intake port. The space between the mouth and the mouth was defined by a filter diagonally with respect to the air flow path.

(Function) A mixer is installed in front of the blower fan, and this mixer has an inlet directly connected to the return air inlet 12 and an inlet opened under the floor via an air volume adjustment damper, so that the indoor air At the same time, the underfloor space itself can be used as an air supply path without having to specially form and install an air supply path.

Furthermore, it is possible to adjust the mixing ratio of the indoor air and the air supplied from the air conditioner by selecting the opening ratio of the inlet of the mixer by the opening degree of the damper.

Room temperature can be controlled simply by controlling the opening degree of the damper on the air supply side from the air conditioner by utilizing the suction resistance of the return air suction port on or near the floor surface. That is, when the air supply side damper is fully open, the air conditioner pressurizes the supply air, 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 sufficient to use a filter only on the return air side from the room, and at the same time, the amount of air supplied from the air conditioner can be easily controlled by changing the wide angle of the damper. In addition, the filter is tilted to make the mixer thinner, and the filter area is increased to control the increase in passage resistance.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which the same components and devices as in the conventional example are designated by the same reference numerals.

Conditioned air from an air conditioner 4 is discharged and supplied to the space between the floor slab 1 and the floor panel 2, and this underfloor space itself serves as an air supply path 3a.

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

The mixer 15 has two suction ports, one of which is directly connected to the return air suction port 12 through a duct, and the other opens into the air supply path 3a via a motor damper 16 whose opening/closing and opening angle can be adjusted.

The motor damper 16 is interlocked with the blower fan 7, and becomes fully open when the blower fan 7 stops.

Furthermore, a thermostat 17 is installed in the room 5 for the purpose of controlling the room temperature, and this changes the damper angle of the motor damper 16.

Inside the mixer 15, the right end is directly connected to the air inlet 8 of the blower fan 7, and the left end has air inlets above, below, and above. Although it is directly connected, it is flexible in terms of delivery, so
A suction port 18 is also provided at the top, and here the left suction port 18a is used. A motor damper 16 is provided at the lower left intake port.

A filter 19 defines a space between the suction port 18a and the outlet of the damper 16 within the mixer 15.

The filter 19 is arranged obliquely from the upper edge of the outlet of the damper 16 to above the outlet of the mixer 15.

This allows the mixer 15 to be made thinner and the filter 190 to be thinner.
The area is made as large as possible.

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

(Effects) As explained 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 supplied from the air conditioner is supplied from the underfloor air conditioner. Since the air is drawn directly from the air supply path, the room air and the air supplied from the air conditioner are mixed only inside the mixer. Therefore, the temperature of the air supply path can be kept constant, so there is no need to arrange a special air supply duct, etc., and the underfloor space can be widely used, and it is not limited by the cross-sectional area of the duct. ,
You can freely add air outlets on the floor.

Furthermore, 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. The filter is inserted diagonally in the mixer, so its area is enlarged.
It has low passing resistance and high a-over effect.

The motor damper uses the filter's passage resistance and is economical because it only needs to be supplied with air from the air conditioner.

Furthermore, if the blower fan and damper are linked and the damper is closed when the fan is stopped, the air supply pressure from the air conditioner returns and is cut off from the air intake and air outlets, causing air to flow from these air intakes and air outlets. It has the effect of completely preventing air leakage.

[Brief explanation 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 3...Air supply path 5...Room 7...Blower fan 9...Discharge port 11... Duct 13... Ceiling 15... Mixer 17... Thermostat 19... Filter 2... Floor panel 4... Bottom air conditioner 6...・Blowout port 8...Suction port 10...Blowout port 12...Return air suction port 1 14...Intake port 16...Motor damper 18...Intake port

Claims (1)

[Claims] (1) In an air conditioner in which the floor space of the double floor is used as the air supply path of the air conditioner and the air outlet is configured on the floor surface, the return air inlet is provided on or near the floor surface, and the air supply path is A mixer and a blower fan are arranged in series in the passageway, and the outlet of the blower fan is connected to the blower outlet, one of the inlets of the mixer is connected to the return air inlet, and the other is connected to the return air inlet. The air supply path is exposed through an opening/closing damper with a variable opening angle, and a temperature sensor installed indoors links the opening angle of the damper to an opening that balances the set temperature, and inside the mixer. , a floor blowing type characterized in that a filter is formed obliquely with respect to the air flow path between the inlet of the mixer passing through the damper and the other inlet connected to the return air inlet. air conditioner.