JPH06185780A - Method and apparatus for ventilating - Google Patents

Abstract

PURPOSE:To perform an efficient substitution ventilation and to eliminate a discharge duct by blowing conditioned air from a lower part of a room into the room at a low speed, generating a high speed air jet flow in the vicinity of a ceiling in a horizontal direction, and discharging the air in the room by the generated air flow from a discharge port near the ceiling. CONSTITUTION:When the air near the ceiling in a room 1 is sucked and discharged by a blower 7, a high speed air jet flow is blown from nozzles 9-17 via a small-diameter duct 8 in a horizontal direction. The air guided and conveyed by the jet flows flown from the nozzles 14, 17 is conveyed to an area to be guided and conveyed by the jet flow to be flown from the nozzle 11, the air in the room near the ceiling is similarly fed to a discharge port 18, and forcedly discharged by a ventilation fan 19. On the other hand, since conditioned air is supplied from a substitution ventilation diffuser 4 to the vicinity of a lower floor 2 in the room 1 at a low speed, substitution ventilation in the room 1 can be efficiently conducted. Accordingly, it is not necessary to provide a discharge port and a discharge duct in a space under a roof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation method by replacement for performing air conditioning ventilation in a room (replacement ventilation method), and a ventilation device for implementing this ventilation method.

[0002]

2. Description of the Related Art The displacement ventilation method utilizes temperature stratification resulting from the temperature difference between the conditioned air supplied to the room and the air warmed by the heat load caused by the heat generated in the room, and it is used for living areas and work near the floor. It fills the area with fresh and clean air, and has superior features such as a small air volume and a small cooling capacity compared to the conventional dilution ventilation method.

When this replacement ventilation method is adopted, it is premised that the exhaust air is taken out from the ceiling from the viewpoint of the above-mentioned temperature stratification use. In this respect, the conventional replacement ventilation method for a room is shown in FIG. The configuration was as shown. That is, the ceiling part 51 is provided with exhaust ports 52, 52 ... And the exhaust duct 5 communicating with these exhaust ports 52, 52.
3 is provided in the space above the ceiling of the ceiling portion 51, and an exhaust fan 54 located outside the room is provided in the exhaust duct 53. The introduced outside air for air conditioning is supplied into the room through an outlet 55 provided near the floor of the room, and the raised air warmed by the heat generated in the room is exhausted from the exhaust ports 52, 52.
, And is exhausted to the outside from the exhaust duct 53 by the exhaust fan 54.

[0004]

However, in such a conventional structure, the ceiling portion 51 has exhaust ports 52, 52,
52 ..., and these exhaust ports 52, 52, 5
It is also necessary to arrange the exhaust duct 53 communicating with 2 ... In the space above the ceiling of the ceiling portion 51. However, in an existing building or room, it is extremely difficult to secure a space in which the exhaust port 52 and the exhaust duct 53 are newly provided in the ceiling portion 51. Therefore, while recognizing the superiority of the replacement ventilation method, it was hardly implemented for existing buildings and rooms.

[0005]

The problem with the above-mentioned conventional technique is due to the fact that the exhaust of the indoor air depends on the old exhaust port and exhaust duct. Therefore, in the present invention, a ventilation method employing a new means for exhausting indoor air,
In addition, a ventilation device is provided to solve the above problem.

Therefore, in claim 1, first, the conditioned air is blown into the room at a low speed from the lower side of the room to be ventilated, and a high-speed air jet stream is horizontally generated near the ceiling of the room to generate the high speed air. Provided is a ventilation method characterized in that room air is exhausted from an exhaust port provided near a ceiling by an air flow generated by an air jet flow. It should be noted that the term "inside the room" includes not only the side walls below the room but also the floor surface inside the room.

In the case of the above invention, the conditioned air supplied to the room may be lower in temperature than the room air.

Further, as a concrete apparatus for carrying out the invention described above, an outlet for conditioned air is provided below a room to be ventilated, while an outlet for indoor air is provided near a ceiling in the room, and A blower for discharging indoor air at a higher speed than the conditioned air, and a small-diameter duct for transferring the discharge air from the blower are respectively provided, and a plurality of directional nozzles with the outlets in the horizontal direction are provided at appropriate intervals. Provided in claim 3 is a ventilator characterized in that it is connected to a small-diameter duct below and the outlets of some of these nozzles are directed towards the exhaust outlet.

[0009]

The high-speed air jet flow generated near the ceiling in the room as described in claim 1 attracts and conveys ambient air.
Therefore, the indoor air warmed and raised by the heat load due to the heat generation in the room is attracted and carried by the air jet flow, and by setting the carrying destination to be the exhaust port, the indoor air is exhausted from the exhaust port. The replacement ventilation with the conditioned air blown from below in the room is performed. Therefore, the high-speed air jet flow near the ceiling may be generated so that the indoor air near the ceiling is finally attracted and conveyed to the exhaust port.

In this case, if the temperature of the conditioned air is positively set to a temperature lower than the room air, the ventilation efficiency is improved.

According to the third aspect, since the exhaust port, the blower, the small-diameter duct, the nozzle, etc. are installed near the ceiling in the room to be ventilated, it is not necessary to install the duct in the ceiling space. . A high-speed air jet flow is generated horizontally near the ceiling by each nozzle, and the air outlets of some of these nozzles are directed toward the exhaust port, so the room near the ceiling that has been attracted and transported. The air is conveyed to the exhaust port and is exhausted from the exhaust port, and ventilation is performed by replacement with the conditioned air as in the first aspect. In consideration of such an action, the air outlets of some of the nozzles may be directed toward the exhaust port so that the indoor air near the ceiling is finally attracted and conveyed to the exhaust port.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side view of the embodiment of the present invention.
Is a room to be ventilated, and is a room in an existing building with a floor surface 2 to a ceiling surface 3 of 3 m or more. The height from the floor surface 2 to the ceiling surface 3 of the room 1 is set to 3 m or more, but in a room having such a height of about 3 m, for example, a high-speed blowout of a living area of about 2 m in height from the floor surface 2 is achieved. A stratified region is formed due to the temperature difference between the upper and lower sides without being affected by the stirring action, and the living region can be filled with fresh and clean air. Therefore, if the height of the living area is 2 m or more, the height of the room should be 3 m or more accordingly.

A ventilation outlet 4 for replacement ventilation is installed near the floor 2 of the room 1, and the introduced outside air as the conditioned air is replaced from the air supply fan 5 located outside the room 1 through the air supply duct 6. The air is blown out below the room 1 from the ventilation outlet 4. The blowing wind speed is a low speed of 0.6 m / s or less. By setting the wind speed to 0.6 m / s or less, the stratification due to the difference in temperature between the upper and lower sides can be maintained.

On the other hand, a blower 7 for taking in and discharging the air in the room 1 is installed on the ceiling surface 3 of the room 1, and the discharged air passes through a duct 8 having a small diameter as shown in FIGS. A plurality of nozzles 9, 10, 11, arranged in
From 12, 13, 14, 15, 16, 17, a high-speed air jet flow is blown into the room 1. These nozzles 9, 10, 11, 12, 13, 14, 15, 16,
In No. 17, the diameters of the air outlets are all 20 to 30 mm, and the blowing air velocity is set to 10 to 30 m / s.

If the diameter of the air outlet is made larger than the above value, the blowing wind speed must be slowed under the same momentum. However, if this is done, the range of influence of the nozzles (inducible conveyance possible range) will decrease, and as a result the nozzle intervals must be made closer, and the amount of construction of nozzles and ducts will increase, making it impractical. On the other hand, it is necessary to increase the discharge pressure of the blower 7 in order to increase the blowing air velocity, but this increases the power and noise value of the blower 7, and is not suitable for a space where a quiet atmosphere is required. Therefore, the blowing air velocity should be 10 to 30 m / s.
It is practical.

Further, each of these nozzles 9, 10, 11, 1
The intervals between 2, 13, 14, 15, 16 and 17 are equidistant as shown in FIG. 2, and the intervals are
Both X and Y in the figure are 3 to 6 m. If the distance is made larger than this, the momentum per nozzle must be increased when the momentum given to the room is constant in combination with the diameter of the outlet of the nozzle and the speed of the blown air. As a result, the affected area of the nozzle becomes larger accordingly, and as a result, it can be applied only to the space of the indoor height where the stratification of air near the floor surface is not destroyed. Therefore, the nozzle interval is preferably 3 to 6 m as described above because of its versatility.

Each of these nozzles 9, 10, 11, 1
The blowing directions of 2, 13, 14, 15, 16, 17 are:
The nozzles 9, 10, 11 have an exhaust port 18 provided near the ceiling.
The outlets of the nozzles 12 and 15 to the nozzle 9 and the outlets of the nozzles 13 and 16 to the nozzle 1.
At 0, the outlets of the nozzles 14 and 17 are directed to the nozzle 11, respectively.

The air exhausted from the exhaust port 18 is
The exhaust fan 19 is configured to forcibly exhaust air from an external exhaust duct 20. The present embodiment is configured as described above, and when performing ventilation of the room 1, the air supply fan 5 is operated to supply the conditioned air from the replacement ventilation outlet 4 to the room 1 at a low speed. The temperature of the conditioned air at this time is set lower than the temperature of the room air.

When the blower 7 is operated to suck in and discharge the indoor air near the ceiling of the room 1, the small-diameter duct 8
Through each nozzle 9, 10, 11, 12, 13, 1
A high-speed air jet stream is blown horizontally from 4, 15, 16, and 17. At this time, each nozzle 9, 10, 1
Since 1, 12, 13, 14, 15, 16, and 17 are arranged as shown in FIG. 2, the indoor air attracted and conveyed by the high-speed air jet flow blown from the nozzles 14 and 17 is discharged from the nozzle 11. The high-speed air jet flow blows out to the area where it can be attracted.
Similarly, the indoor air attracted and conveyed by the high-speed air jet flow blown out from the nozzles 13 and 16 is blown from the nozzles 12 and 15 into the attractable conveyable area by the high-speed air jet flow blown out from the nozzle 10. The indoor air attracted and transported by the air jet flow is transported to the attractable transportable area by the high-speed air jet flow blown out from the nozzle 9, and further, the nozzle 11 directs the indoor air to the attractable area of the nozzle 10, and the nozzle 10 The indoor air is transported to the attractable area of the nozzle 9, and the indoor air near the ceiling is eventually sent to the exhaust port 18 by such a high-speed air jet flow, and then forcibly exhausted by the exhaust fan 19. It is.

As described above, according to the present invention, the room air warmed by the heat generated in the room and rising to the vicinity of the ceiling is sucked from the blower 7, and the nozzles 9, 10, 11,
12, 13, 14, 15, 16, 17 are attracted and conveyed by the high-speed air jet flow and exhausted from the exhaust port, while the conditioned air is constantly blown from the replacement-use outlet 4 near the lower floor 2 of the room 1. Since it is supplied by, the replacement ventilation of the room 1 can be efficiently performed.

Further, in the above case, the temperature of the conditioned air from the replacement ventilation outlet 4 supplied into the room 1 is set lower than the temperature of the room air, so that the rise of the room air is promoted, Ventilation efficiency is extremely high.

Further, as is clear from FIG. 1, it is not necessary to install an exhaust port or an exhaust duct in the space above the ceiling of the target room 1, and there is no space in the space above the ceiling such as in an existing building. In this case, the present invention can be carried out. Moreover, it can be installed near the ceiling because it requires a blower, a nozzle, and a duct with a small diameter.

Furthermore, since the arrangement of the nozzles may be set so that the indoor air is finally conveyed to the exhaust port, the most suitable nozzle arrangement is adopted according to the situation of the indoor space to be ventilated. It is possible to perform replacement ventilation very efficiently.

[0024]

According to the first aspect of the present invention, the indoor air warmed and raised by the heat load due to the heat generation in the room is attracted and conveyed by the high-speed air jet stream generated near the ceiling, and is exhausted very efficiently. Air conditioning ventilation by replacement ventilation can be performed. Further, when implementing it, it is not necessary to install an exhaust duct in the space above the ceiling, so that it can be implemented even in an existing building or when there is no space in the space above the ceiling.

In the second aspect, since the temperature of the conditioned air is set to be lower than that of the room air, the temperature stratification is effectively formed and the ventilation efficiency is further improved.

According to the third aspect, as in the first aspect, the room air warmed and raised by the heat load due to the heat generation in the room is attracted and conveyed by the high-speed air jet stream discharged from the nozzle, and exhausted. It is possible to perform replacement ventilation in the room extremely efficiently. Regarding the necessary construction, it is sufficient to install an exhaust port, a blower, a small-diameter duct, a nozzle, etc. near the ceiling of the room where you are going to ventilate, so there is space available in the existing building and the space above the ceiling. Even if there is not, it can be implemented. Furthermore, in the destination room,
It is also easy to arrange the most suitable nozzle according to the size and the situation.

[Brief description of drawings]

FIG. 1 is an explanatory view of a side view of an embodiment.

FIG. 2 is an explanatory plan view showing a situation of nozzle arrangement in the embodiment.

FIG. 3 is an explanatory view from the side of a conventional technique.

[Explanation of symbols]

1 Indoor 2 Floor 3 Ceiling 4 Displacement ventilation outlet 5 Air supply fan 6 Air supply duct 7 Blower 8 Small diameter duct 9, 10, 11, 12, 13, 14, 15, 16, 17
nozzle

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[Procedure amendment]

[Submission date] July 15, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

According to the third aspect, as in the first aspect, the room air warmed and raised by the heat load due to the heat generation in the room is attracted and conveyed by the high-speed air jet stream discharged from the nozzle, and exhausted. It is possible to perform replacement ventilation in the room extremely efficiently. Regarding the necessary construction, it is sufficient to install an exhaust port, a blower, a small-diameter duct, a nozzle, etc. near the ceiling of the room where you are going to ventilate, so there is space available in the existing building and the space above the ceiling. Even if there is not, it can be implemented. Furthermore, in the destination room,
It is also easy to arrange the most suitable nozzle according to the size and the situation.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is an explanatory view of a side view of an embodiment.

FIG. 2 is an explanatory plan view showing a situation of nozzle arrangement in the embodiment.

FIG. 3 is an explanatory view from the side of a conventional technique.

[Explanation of Codes] 1 Indoor 2 Floor 3 Ceiling 4 Displacement ventilation outlet 5 Air supply fan 6 Air supply duct 7 Blower 8 Small diameter duct 9, 10, 11, 12, 13, 14, 15, 16, 17
nozzle

Claims (3)

[Claims] 1. A high-speed air jet stream is horizontally generated near the ceiling of the room while the conditioned air is blown into the room at a low speed from below the room to be ventilated. The ventilation method is characterized in that the indoor air is exhausted from the exhaust port provided near the ceiling by the air flow. 2. The ventilation method according to claim 1, wherein the conditioned air is lower in temperature than the indoor air. 3. An outlet for conditioned air is provided below a room to be ventilated, while an outlet for indoor air and a blower for sucking and discharging indoor air are provided near the ceiling in the room, and from this blower. Each of the nozzles has a small diameter duct that transfers the discharge air, and a plurality of directional nozzles with horizontal outlets are connected to the small diameter duct at appropriate intervals. The ventilator is characterized in that the air outlet of the air outlet is directed to the exhaust port.