JPH0147693B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioning system for large spaces such as banquet halls and large halls.

BACKGROUND ART Conventionally, air conditioning systems for large spaces such as hotels have typically adopted a constant air volume/constant temperature blowing control method because temperature stratification occurs due to the large space. In such a large space, the load fluctuates widely depending on how it is used, so a variable air volume system is actually the most suitable system from an energy-saving perspective, but it has not yet been adopted. The main reason for this was that temperature stratification is likely to occur when the blowing air speed changes, especially during heating in winter, resulting in the air conditioning of the living area becoming unsatisfactory unless an extra load (heat source) is applied. . In addition, even during the cooling season, if the room temperature is raised to 28°C to save energy in the living area, which was established under a room temperature of 25 to 26°C and a wind speed of 0.25 m/sec, for example, the residual velocity in the living area would require 0.75m/sec,
Attempting to obtain such a residual speed would require a significant increase in air conditioning power, which would go against energy conservation.

The present invention aims to solve these problems, and provides a variable air volume air conditioning system for large spaces that provides optimal conditions in response to load fluctuations and achieves energy savings.

The details of the present invention will be specifically explained below with reference to the drawings.

FIG. 1 is a diagram of an air conditioning system according to the present invention for a banquet hall, showing the plane of the ceiling. In the illustrated example, the banquet hall is freely partitioned into three sections (a), (b), and (c). In the figure, 1a to 1n are air outlet boxes arranged on the ceiling, and each of the air outlet boxes 1a to 1n has a main duct A ₁ , a main branch duct, and a main branch duct from the air conditioner AC.
Conditioned air is guided through A ₂ and branch duct A ₃ . The air supply system of the air conditioner AC uses an air supply fan F that can control the flow rate. on the other hand,
High pressure is supplied to a plurality of nozzles 2a to 2i (details of which will be described later) installed on the air outlet surface of each of the air outlet boxes 1a to 1n by a duct in a system different from the air supply system duct A. Air is supplied. Hereinafter, this separate air supply system will be referred to as the "daily event system." This daily vent system consists of a daily vent unit DU (the details of which will be described later), a main duct _B1 , and a branch duct _B2.In the illustrated example, air from the exhaust system is supplied to the daily vent unit DU. It's becoming like that. The exhaust system is
The air inside the banquet hall is exhausted to the outside of the building by an exhaust fan RF that can control the flow rate, and the exhaust air from this exhaust duct C is sucked into the daily vent unit DU. Note that a part of the exhaust gas is circulated to the air conditioner AC as return air. in this case,
The CO ₂ gas concentration in the exhaust gas is detected by the CO ₂ gas sensor S, and based on this detection signal, the damper of the outside air intake passage and the damper of the return air intake passage are controlled proportionally or stepwise to reduce the outside air load. Drive to save energy so that it decreases as much as possible. FIG. 2 is a substantially longitudinal section of the banquet hall, showing an airflow state in which intermittent airflow is blown out in each direction from the high ceiling of the banquet hall, and exhaust air is sucked in from below. The present invention is characterized by blowing out a high-speed intermittent air flow from the high ceiling of such a large space. The above-mentioned problem is solved by blowing out air while attracting it.

Each element used in this system will be explained in order below.

Figure 3 is a partial enlarged view of the air outlet box 1 in the ceiling. Conditioned air in the supply air system is introduced from the main branch duct A ₂ to the branch duct A ₃ to the side of each air outlet box 1. The air from another system of the daily vent system (air from the exhaust system in the case of Fig. 1) is sent from the daily vent unit DU via the main duct _B1 to the airflow conversion box ₃ , which will be described later, via the flexible duct branch duct B2. be introduced. As shown, the daily vent system ducts B ₁ and B ₂ are
It has a shorter diameter than ducts A ₂ and A ₃ , and is a daily vent unit with a built-in high-speed blower as described below.
High pressure air is introduced into each airflow conversion box 3 from the DU.

4 to 7 show details of an air blowing device consisting of a combination of the air blowing outlet box 1 and the air flow conversion box 3 described above, and FIG. is -' cross section, Figure 7 is -
'The part corresponding to the cross section is shown. As shown in the figure, the air outlet box 1 has an air outlet opening surface 4.
and a box provided with a duct connection port 5, and a blowout grille is attached to the entire surface of the air blowing opening surface 4, and an example is shown in which the opening surface 4 is installed at the same level as the ceiling 12. Duct connection port 5
is provided on one side of the box 1, and the aforementioned branch duct _A3 of the air supply system is connected to this. Also,
This air outlet box 1 is heat-insulated.
On the other hand, the airflow conversion box 3 is installed above the air outlet box 1.
A duct connection port 6 is provided on the top surface of the duct and is connected to a daily vent system duct _B2 . Also, on the bottom surface of this box 3, there are a plurality of air outlets 7a to 7.
i is provided. And this air outlet 7a
~7i, flexible small ducts 9a~9i extend into the air outlet box 1, and the tips of the small ducts 9a~9i connect to the nozzle ports 8a~8i provided in the air blowing opening surface 4. being directed towards These nozzle ports 8a to 8i can be of a type whose direction can be freely changed. In addition, by arranging the tips of the small ducts 9a to 9i (nozzle shapes 2a to 2i) to face the nozzle openings 8a to 8i with a slight gap, a high-speed flow is injected from the small ducts 9a to 9i. Finally, it is preferable to draw a portion of the air in the air outlet box 1 to the nozzle ports 8a to 8i. Note that even if this gap is not provided, the nozzle port 8
Conditioned air blown from the grille surface is attracted and conveyed downward by the high-speed flow injected from a to 8i.

In the illustrated example, the airflow conversion box 3 has a rectangular shape, and is provided with a half-height partition plate 15 perpendicular to the long axis direction, which separates two branch chambers. 16 and 17 are formed below the box, and the same number of air outlets 7a to 7i are provided on the lower surfaces of the branch chambers 16 and 17. Above this vertical half-height partition plate 15 is a horizontal partition plate 18 (Fig. 5) that extends across the inside of the box 3, and above this partition plate 8 is an air supply chamber 19. It is formed. The horizontal partition plate 18 is provided with openings 20 and 20' having equal opening areas for both the branch chambers 16 and 17.
a rotating plate 21 having an area that closes approximately half of 0';
21' is installed. This rotating plate 21, 2
1' is forcibly rotated by a geared motor 22,
High pressure air in the air supply chamber 19 is intermittently distributed to the branch chambers 16 and 17.

According to the air blowing device configured in this way, the air blowing chamber 1 of the air flow conversion box 3 is
The high pressure air continuously introduced into the motor 22
Rotation of the rotary plates 21, 21' by driving (for example,
2 rpm), and this intermittently distributed high-pressure air is intermittently injected into the large space from each nozzle port 8a to 8i as a high-speed flow. It turns out. Due to the intermittent high-speed blow-off flow of the daily vent system, the conditioned air of the supply air system is transported to a long distance while being attracted, and the object of the present invention stated at the beginning is effectively achieved.

8 to 14 show an example of a daily vent unit DU suitable for use with the system of the present invention, in which a casing 30 is connected to a suction chamber 3 by a partition 31.
The blower 35 is housed in the suction chamber 32 so that the air sucked into the suction chamber 32 from the suction port 34 is discharged into the discharge chamber 33. One or more duct connection ports 36 are provided in the casing wall, and a sound deadening plate 37 is attached near the suction port 34. This blower 35
A plurality of units may be stored in combination as shown in FIGS. 10 to 11, and a sound deadening plate 38 may also be provided in the discharge chamber 33 as shown in FIGS. 8 to 11 to further enhance the sound deadening effect. During installation, the casing 30 is preferably lined with a sound deadening material. In some cases, the blower 35 may be housed at an angle, as in the example shown in FIG. In addition, 39 in the figure is the motor,
40 represents a hanging fitting. When applying this system, connect the exhaust system duct to the suction port 34 as explained in Figs. 1 and 2, connect one duct B ₁ of the duct connection ports 36 a to 36 c, and The duct connection port can be left blind. The motor 39 attached to the daily vent unit DU is a variable speed motor, and the amount of air blown is controlled by controlling the rotation speed of the motor 39.

In actual operation of the system of the present invention, since the load of large spaces such as banquet halls fluctuates depending on the usage, the supply air fan F, exhaust fan RF, and daily vent must be adjusted in response to the load fluctuations. The air volume of the fan 35 of the unit DU is controlled using a microcomputer, etc., and when the amount of space changes due to the partition type, damper control installed in duct A ₂ is used to air-condition the necessary living area. Just do it.

As described above, according to the present invention, when air-conditioning a large space with a high ceiling where temperature stratification occurs, it is possible to air-condition at an energy-saving temperature by blowing out variable air volume using intermittent induced flow, and at the same time, it is possible to air-condition a large space with a high ceiling where temperature stratification occurs. The present invention provides an air conditioning system for a large space that can be easily controlled to an optimum state even when the air conditioner is in use, and is extremely useful as an energy-saving air conditioner.

[Brief explanation of drawings]

FIG. 1 is an equipment layout system diagram of the air conditioning system of the present invention.
2 is a partial schematic vertical cross-sectional view of FIG. 1, FIG. 3 is an enlarged perspective view of a portion around the air outlet box, FIG. 4 is a schematic vertical cross-sectional view showing an embodiment of the air blowing device according to the present invention, and FIG. is a sectional view taken along the line -' in Fig. 4,
6 is a cross-sectional view taken along the line -', FIG. 7 is a cross-sectional view taken along the line -', FIG. 8 is a longitudinal cross-sectional view showing an example of the daily vent unit applied to the present invention, and FIG. 9 is a cross-sectional view taken along the line -'. 10 is a cross-sectional view showing another example of the daily vent unit, and FIG. 11 is a cross-sectional view of the same.
The figure is a longitudinal cross-sectional view thereof, and FIG. 12 is a cross-sectional view showing another example of the daily vent unit. 1... Air outlet box, 2... Nozzle, 3
...Air flow conversion box, 4...Air blowing opening surface, 5...Duct connection port, 6...Duct connection port,
7... Air outlet, 8... Nozzle port, 9... Small duct, 15... Vertical partition plate, 18... Horizontal partition plate, 21... Rotating plate, 22... Motor, A... Air supply system Duct, B...Daily vent system duct, C...
...Exhaust system duct, AC...Air conditioner, F...
Air supply fan, RF...Exhaust fan, DU...Daily vent unit.

Claims (1)

[Scope of Claims] 1. A duct A is provided for guiding conditioned air to a plurality of air outlet boxes 1a to 1n arranged on the ceiling of a large space, and each air outlet box 1a to 1n is
A duct B that guides high-pressure air is installed in a separate system from the duct A to a plurality of induction nozzles installed on a 1n air blowing surface, and a high-pressure air is injected intermittently from this induction nozzle while the above-mentioned harmonization is carried out. An air conditioning method for large spaces that draws and blows air. 2 Air outlet box 1 and air flow conversion box 3
An air blowing device consisting of a combination of the above-mentioned air blowing outlet box 1 consisting of a box provided with an air blowing opening surface 4 and a duct connection port 5,
The air flow conversion box 3 is composed of a duct connection port 6 and a box provided with a plurality of air outlet ports 7a to 7i, and the air blowing opening surface 4 is provided with a plurality of nozzle ports 8a to 8i. Mouth 8a-8
i is provided with small ducts 9a to 9i that guide the air flowing out from the air outlets 7a to 7i, and connects the duct connection port 6 of the air flow conversion box 3 and the air outlets 7a to 7.
i from duct connection port 6 to box 3
An air blowing device for use in the method according to claim 1, further comprising an airflow distribution device for intermittently distributing air flowing into the air outlet ports 7a to 7i. 3 Small ducts 9a to 9i are connected to each nozzle port 8a to 8i
3. The air blowing device according to claim 2, wherein the air blowing device is connected to the inflow side with a slight gap. 4. The air blowing device according to claim 2, wherein the airflow distribution device comprises a rotating plate driven by a motor.