JPH043830A - Temperature stratification type cooling equipment - Google Patents

Abstract

PURPOSE:To save energy by a method wherein a discharge port through which cold air is discharged in a lateral direction is formed in the middle position in a vertical direction of an object space an an induction preventing tool is arranged in a level lower than those of a suction port and a discharge port and has an under surface horizontally extending from the upper edge of the discharge port or a spot near a position above the discharge port so that a discharge air velocity in a position equivalent to a tip in a cold air discharge direction is within a range of 0.2 - 0.5 m/s. CONSTITUTION:A discharge port 2 is formed in the middle position in a vertical direction of an object space 1 having a high ceiling height, and a suction port 5 is formed in a level lower than that of the discharge port 2. A plateform induction preventing tool 10 having an under surface 10a extending in horizontal orientation in a cold air discharge direction from a spot near a position above the discharge port 2 is located to a side wall 9 in which the discharge port 2 is formed. A length l of the under surface 10a of the induction preventing tool 10 is set to a value at which an air velocity in a position equivalent to a tip in a cold air discharge direction is within a range of 0.2 - 0.5 m/s, and a hot air drawing-in phenomenon is prevented from occurring to save energy.

Description

[Detailed Description of the Invention] 3. Fields of Industrial Application] The present invention provides a method for arranging an air outlet that blows out cold air sideways at a position midway in the vertical direction of a target space, and arranging an inlet at a lower position than the air outlet. Is the height of the air outlet in the target space? By setting the area below the installation height as the area to be cooled, and using the arrangement of each outlet as described above, the natural fall of the cold air blown out can be used to cool the area ( In other words, the present invention relates to a temperature stratification type cooling equipment which aims to save energy by cooling only the above-mentioned cooling target area in a limited manner.

This conventional technology] The temperature stratification type cooling equipment described above is often implemented in places with high ceiling heights such as factory buildings and assembly halls. Up,
No care or consideration was given.

[Problem to be solved by the invention]

However, as a result of an experimental study on the cold air after being blown out, we found that simply blowing out the cold air sideways from the outlet is not enough to cause the cold air to be blown out sideways from the outlet (2) and after being blown out, as shown in Figure 4. Due to the arching effect caused by the horizontal flow of cold air, a large amount of warm air in the area (i.e., non-cooling target area (lb)) that is higher than the height of the air outlet (2) is blown out and caught up in the cold air.
For this reason, the cooling load to be handled increases by an amount corresponding to the amount of warm air drawn in from the non-cooling target area (1b) due to the above-mentioned inducement, in addition to the cooling load of the limited cooling target area (1a). As a result, we discovered that there was a problem that was limiting the ability to achieve the desired goal of energy conservation.

An object of the present invention is to make it possible to more effectively achieve energy savings in temperature stratified cooling equipment through rational improvements.

[Means to solve the problem]

The first characteristic configuration of the temperature stratified cooling equipment according to the present invention is as follows:
An air outlet that blows out cold air sideways is placed midway in the vertical direction of the target space, and an inlet is placed at a lower position than the air outlet, so that the height of the target space is as high as the air outlet. In a configuration in which an area below the height is set as an area to be cooled, an attraction prevention device is provided having a lower surface extending in a direction from which cold air is blown out from the upper edge of the air outlet O or near the upper side in a substantially horizontal position. The actions and effects are as follows.

3. In other words, in temperature stratified cooling equipment) (see Part 2)
, a bow prevention device (10) having a lower surface (10a) as described above.
), the warm air in the non-cooling target area (1b), which is higher than the height of the air outlet (2), is blown out sideways as cold air.
Further, the barrier function of the attraction prevention device (10) can prevent the person from being caught in the blown cold air due to the attraction effect caused by the subsequent horizontal flow of the cold air.

〔Effect of the invention〕

As a result of the above actions, it is possible to avoid the cooling load to be handled from increasing by the amount of warm air drawn in from the non-cooling target area, and the cooling load to be handled can be increased by the height of the air outlet arrangement height. The cooling load can be limited to the following cooling target area, and as a result, the intended purpose of temperature stratification type cooling equipment, which is energy saving, can be achieved more effectively than in the past.

[Second characteristic configuration of the present invention] The second characteristic configuration of the temperature stratification type cooling equipment according to the present invention is as follows:
The wind speed of the cold air blown out at a position corresponding to the tip of the lower surface in the cold air blowing direction of the attraction prevention device is 0.2 to 0.5 m.
The length of the lower surface in the cold air blowing direction is set so as to be within the range of /s. According to this second characteristic configuration, after blowing from the blower outlet,
In places where the wind speed of the cold air blown out has decreased to about 0.2 to 0.5 m/s, the attraction effect associated with the flow of cold air has decreased considerably, and when performing temperature stratified cooling, it is difficult to use the attraction for non-cooling. Based on the experimental results that the entrainment of warm air from the area is sufficiently negligible, by setting the length of the lower surface in the cold air blowing direction as described above, the operation and effect of the first characteristic configuration can be sufficiently achieved. However, it is possible to prevent the length of the lower surface from becoming unnecessarily long, in other words, it is possible to prevent the bow prevention device from becoming unnecessarily large.

〔Example〕

Next, an example will be explained.

In FIG. 1, (1) is the target space for the equipment, and indicates a space with a high ceiling height (H) such as a factory building or an assembly hall.

(2) is the air outlet of the side wall west device that blows out cold air supplied from the air conditioner (3) through the air supply air path (4) sideways into the target space (1), and (5) is the outlet of the side wall west device that blows out the cold air supplied from the air conditioner (3) through the air supply air path (4) into the target space (1). 1) This is a suction port that sucks in and exhausts the air inside.
Part of the air exhausted from 5) is disposed of outdoors via the exhaust air path (6), and the remainder is returned to the air conditioner (3) along with the outside air taken in from the outside air intake path (7). .

The air outlet (2) is located in the target space (with a high ceiling height (H)).
1) in the vertical direction (in this example, the height from the floor (8) is approximately 1 m higher than the human height), and the suction port (5) is located at a position that is approximately 1 meter higher than the height of a human being. It is placed at a low position (near the floor (8) in this example), and with this arrangement, by utilizing the natural descent of the cold air, the height of the air outlet (2) in the target space (1) is lower than that of the air outlet (2). So-called temperature stratified cooling is implemented in which a region below the height (that is, a lower region where humans exist in this example) is limitedly cooled as a cooling target region (1a).

In other words, the height of the target space (1) is the air outlet (2).
) 1 area higher than the installation height of the non-cooling area (1b)
As a result, energy saving is achieved by omitting cooling of this non-cooling target area (1b) (that is, unnecessary cooling of the upper area where no humans are present in this example).

As shown in FIGS. 1 to 3, the side wall (9) on which the air outlet (2) is arranged; 10a) is attached, and the warm air entrainment phenomenon that occurs when the above-mentioned induction prevention device (10) is not provided in the above-mentioned temperature stratification type cooling, that is, Fig. 4. As shown in FIG. 8, the blower 80(2) blows cold air horizontally, and due to the attraction effect accompanying the horizontal flow of the cold air after blowing out, the above-mentioned non-cooling target area ( The above-mentioned attraction prevention device (10), :) prevents the occurrence of the phenomenon O in which warm air blows out and gets caught in the cold air in lb) by using the barrier effect;
As a result, the cooling load O due to the hot air entrainment mentioned above is reduced.
In other words, in order to avoid an increase in the amount of warm air drawn in from the non-cooling target area (1h) due to the above-mentioned induction in addition to the cooling load of the cooling target area (1a), the temperature can be increased. This makes it possible to more effectively achieve energy savings, which is the intended purpose of stratified air conditioning.

The length (A) of the lower surface (10a) of the upper g2 attraction prevention device (10) in the cold air blowing direction, that is, the length (A) of the plate-shaped attraction prevention device (10) itself in this example, is ), in this example, the blowing wind speed is 0-1 to 3 m/s), and when the wind speed of the cold blowing air decreases to about 0.2 to 0.5 m/s, the attraction due to the flow of cold air occurs. The effect is considerably reduced and the target area (1b) is non-cooled due to induction when temperature stratified cooling is implemented.
The length (1) of the lower surface (10a) is such that the 7 molar velocity (Va) at the position (A) corresponding to the tip in the cold air blowing direction is 0. Within the range of .2~05m/s? ;

Further, the width (W) of the lower surface (10a), that is, the width of the plate-shaped attraction prevention device (10) itself in this example, is considerably larger than the width (P,'s) of the air outlet (2). (
(preferably W≧3Ws), and the attraction prevention device (10) is arranged so that the center of the air outlet (2) in the width direction and the center of the lower surface (10a) overlap in plan view. This reliably prevents the entrainment of induced warm air over the entire width of the flow path of the blown cold air.

In addition, the above-mentioned FIG. 2 shows the air velocity V from the air outlet (2).
o = 1.5 m/s, length of the lower surface (], Oa) of the plate-like attraction prevention device (10) in the direction of cold air blowing, f = 5 m,
The wind speed of the cold air at the position (,)\) corresponding to the tip of the lower surface (10a) is ~·aζ015 m/s, and the temperature of the cold air blown out is t.

It shows the airflow state in an experiment conducted at 21° C. and the temperature tr in the area to be cooled (la) = 23° C.

Example of advantageous use] Next, other embodiments of the present invention will be listed.

(a) The attraction prevention device (10) has a lower surface (1, Oa) extending from the top or near the top of the air outlet (2) in a substantially horizontal position in the cold air blowing direction, and its overall shape・The structure is not limited to a plate shape, and various improvements are possible.

(b) The specific placement height of the air outlet (2) may be appropriately determined depending on the height of the area to be cooled (1a), and the specific placement height of the suction port (5). It may be determined appropriately at a position lower than the air outlet (2).

(c) The purpose of the target space (1) is not limited, and the temperature stratification type cooling equipment ID according to the present invention can be applied to spaces for various purposes.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is an overall side view, FIG. 2 is an enlarged side view showing the airflow state, and FIG.
The figure is an enlarged plan view. FIG. 4 is an enlarged side view showing the airflow state in the conventional configuration. (1)...Target space, (1a)...Cooling target area, (2)...Air outlet, (5)...
...Suction port, (10) ... Attraction prevention device, (10
a)...Bottom surface, (A)...Position equivalent to tip, (Va)...Wind speed, <p>...Length.

Claims (1)

[Claims] 1. The air outlet (2) that blows out cold air sideways is connected to the target space (
1) in the middle of the vertical direction, and the suction port (5
) is arranged at a lower position than the air outlet (2), and an area of the target space (1) whose height is less than or equal to the arrangement height of the air outlet (2) is defined as a cooling target area (1a). Temperature stratification type cooling equipment, which is provided with an attraction prevention device (10) having a lower surface (10a) extending from the upper edge or near the upper part of the air outlet (2) in a substantially horizontal position in the cold air blowing direction. Stratified cooling equipment. 2. The lower surface (10a) of the attraction prevention device (10)
The lower surface (10
The temperature stratified cooling equipment according to claim 1, wherein the length (l) of a) is set.