JPH08247488A - Radiant cooler - Google Patents

Abstract

PURPOSE: To provide a radiant cooler designed so that dew condensation hardly occurs on a surface of a radiant panel when a room to be air-conditioned is cooled by using the radiant panel. CONSTITUTION: A radiant cooler allows cold air to flow into a cavity of a radiant panel and cools a room to be air-conditioned with radiant heat from the radiant panel. The surface 15 of the radiant panel is provided with a large number of through-holes 100 through which cold air is blown.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a radiant panel of a radiant cooling device for cooling a conditioned room by utilizing radiant heat of the radiant panel.

[0002]

2. Description of the Related Art In general, there is known a radiation cooling device in which a plurality of radiant panels are installed on a ceiling or the like, cool air is caused to flow in the cavities of the radiant panels, and a conditioned room is cooled by radiant heat from the radiant panels. Has been.

[0003]

In this type, when the temperature of the radiant panel is too low, the room air contacting the surface of the radiant panel is cooled, and when this air becomes lower than the dew point temperature, the surface of the radiant panel is cooled. Condensation on the surface may cause it to wet the floor or carpet.

Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technique and to prevent dew condensation on the surface of the radiation panel when cooling the controlled room using the radiation panel. It is to provide a cooling device.

[0005]

According to the first aspect of the present invention,
In a radiant cooling device that cools a conditioned room by radiant heat of a radiant panel by causing cool air to flow into the cavity of the radiant panel, the surface material of the radiant panel is provided with a large number of through holes capable of blowing cold air.

According to a second aspect of the present invention, in the radiant cooling device for cooling the conditioned chamber by radiant heat of the radiant panel, the cool air is blown to the surface material of the radiant panel. A large number of through holes having a hole diameter of 1 mm or less are provided with a hole interval of 10 mm or less.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the described one, the surface material is provided with uneven portions on its surface.

According to a fourth aspect of the present invention, cool air is blown into the cavity of the radiant panel to cool the conditioned chamber by the radiant heat of the radiant panel, wherein cool air can be blown to the surface material of the radiant panel from the back surface. A through hole gradually expanding toward the front surface is provided, and the hole diameter on the surface of this through hole is formed to be at least twice the hole diameter on the back surface.

According to a fifth aspect of the present invention, in the radiant cooling device in which cold air is flown into the cavity of the radiant panel to cool the conditioned chamber by the radiant heat of the radiant panel, cool air can be blown onto the surface material of the radiant panel. A through hole is provided which spreads like a trumpet from the back surface to the front surface.

According to a sixth aspect of the present invention, in a radiant cooling device that cools a conditioned room by radiant heat of the radiant panel by causing cool air to flow in the cavity of the radiant panel, an uneven portion is formed on the surface of the surface material of the radiant panel. A through-hole capable of blowing cold air is provided substantially in the center of the concave portion of the uneven portion.

The invention according to claim 7 is the invention according to claims 4 to 6.
In the above description, the distance between the through holes is 30 mm or less.

The invention as defined in claim 8 is defined by claim 1 through claim 7.
In the described one, the surface material is made of aluminum.

[0013]

According to the invention described in claims 1 to 8, first, the cool air blown from the through hole of the surface material through the cavity pushes away the room air toward the surface of the surface material of the radiation panel, and at the same time, the surface material. Since the cool air flows around the surface of the, the dew condensation on the surface of the surface material is suppressed. Further, by changing the shape of the through-holes of the surface material in various ways, the cold air easily flows around the surface of the surface material, which further suppresses the dew condensation on the surface of the surface material.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a radiation cooling device. The radiation cooling device 1 includes a cooler 3 and a blower 5
And a plurality of radiation panels 7 installed on the ceiling, for example, and a panel circulation duct 9 connecting them.

As the cooler 3, for example, an evaporator of an air conditioner (not shown) is used, and in this case, a dehumidifying function is provided. Assuming that an evaporator of an air conditioner is used as the cooler 3, the blower 5 blows cool air through the radiant panels 7, and the radiant heat of each radiant panel 7 cools the conditioned room.

According to this embodiment, as shown in FIG.
The radiant panel 7 is a panel having a cavity 11, and the cold air is blown into the cavity 11.

The radiation panel 7 is constructed by providing a surface material 15 made of pure aluminum or an aluminum alloy in an opening of a box-shaped main body 13 formed of a member having excellent heat insulating properties. A large number of through holes 100 capable of blowing cold air are provided in almost the entire surface material 15 of the radiation panel 7. It is desirable that the through holes 100 having a hole diameter of 1 mm or less be provided with a hole interval of approximately 10 mm or less.

According to this, at the time of cooling, the cold air is uniformly blown out from almost the entire surface of the surface material 15 through the large number of small-diameter through holes 100. Since this cold air adheres to the surface of the surface material 15 and pushes indoor air away from the surface, the surface material 1
The surface of 5 is uniformly covered with cold air. Also, the through hole 100
Since has a small diameter as described above, the amount of cold air blown through the through hole 100 can be small. Therefore, the through hole 1
Since the action of entraining air around the outlet of 00 is small, eddy current is unlikely to be generated on the surface of the surface material 15, and the surface of the surface material 15 is uniformly covered with cool air.

When the surface of the surface material 15 is uniformly covered with cool air, even if the temperature of the cool air in the cavity 11 is lower than the dew point temperature of the room air, the dew condensation on the surface of the surface material 15 is suppressed. Further, since the surface of the surface material 15 is cooled by the cool air blown through the through holes 100 and the cool air in the cavity 11, the surface temperature of the surface material 15 becomes extremely close to the cool air temperature, so that the radiation heat is generated. Effective cooling is realized.

Further, the cold air blown out through the through hole 100 also descends into the room and diffuses into the room, thus contributing to the indoor cooling.

When the spacing between the through holes 100 is set to 10 mm or less, the surface material 15 can be formed by appropriately selecting the shape of the holes.
The cold air blown out through the through holes 100 easily adheres to the place where there is no hole 100 on the surface, and the surface of the surface material 15 tends to be uniformly covered with the cool air. Further, when the diameter of the through hole 100 is 1 mm or less, the velocity of the cool air blown through the through hole 100 becomes relatively slow, so that the surface material is changed from the place without the hole 100 to the place with the hole 100. The amount of indoor air sucked along the surface of 15 is reduced, so that the generation of vortex is reduced, the rise of indoor air is suppressed, and the dew condensation on the surface of the surface material 15 installed on the ceiling is sufficiently suppressed. . Furthermore, when the diameter of the through hole 100 is set to 1 mm or less, the hole 100 on the surface of the surface material 15 installed on the ceiling becomes less noticeable.

Practically, the through hole 100 has a hole diameter of 0.5.
It is desirable to provide holes of about 5 mm with hole intervals of about 5 mm.

Next, a preferable shape of the through hole 100 will be described. Referring to FIG. 3, the surface material 1 of the radiation panel 7
In FIG. 5, there is a through hole 10 that gradually expands from the back surface to the front surface.
0 is provided. The diameter D of the surface of the through hole 100 is
It is formed to have a size that is almost twice as large as the hole diameter d on the back surface.

According to this, the cold air in the cavity 11 is shown in FIG.
As indicated by the solid line, the air is blown out in a divergent state, so that the indoor air rarely wraps around where there is no hole 100, and the indoor air is pushed back down as indicated by the dotted line.
Therefore, even if the temperature of the cool air in the cavity 11 is lower than the dew point temperature of the room air, the dew condensation on the surface of the surface material 15 is suppressed.

In this case, since the diffused regions of the cool air blown from the adjacent through holes 100 overlap,
The number of holes is small.

Referring to FIG. 4, surface member 1 of radiation panel 7
The through hole 100 is provided in the opening 5 and extends in a trumpet shape from the back surface to the front surface. According to this, as shown in the figure, the cool air in the cavity 11 is blown out in a divergent state and then adheres to the place where there is no hole 100, so that the room air is pushed back as shown by the dotted line. .

Therefore, the dew condensation on the surface of the surface material 15 is suppressed.

Referring to FIG. 5, surface material 1 of radiation panel 7
A triangular wave-shaped uneven portion 31 is provided on the surface of 5, and a through hole 100 is provided at the center of the concave portion 33 of the uneven portion 31. This also causes the cool air in the cavity 11 to be blown out in a divergent state as shown in the figure, and the room air is pushed back downward as shown by the dotted line. Therefore, dew condensation on the surface of the surface agent 15 is suppressed. In this case, since the surface area is increased by the amount of the unevenness provided on the surface, the radiation effect is expanded.
The uneven portion 31 may have a wavy shape.

In the embodiment shown in FIGS. 3 to 5, the surface material 15 is used.
The hole spacing of the through holes 100 provided on the surface of the can be 30 mm or less. That is, compared with the embodiment of FIG. 2, the hole interval can be widened and the number of holes can be reduced. In this case, the surface material 15 can be easily processed.

FIG. 6 shows another embodiment. According to this,
Triangular wave-shaped uneven portion 31 provided on the surface of the surface material 15.
In addition, a large number of through holes 10 with a hole diameter of 1 mm or less capable of blowing cold air
0 is provided with a hole interval of 10 mm or less. According to this,
The cool air in the cavity 11 is blown out uniformly and the room air is pushed back downward as shown by the dotted line, so that the dew condensation on the surface of the surface material 15 is suppressed. The uneven portion 31 may have a wavy shape.

[0032]

As described above, according to the first to eighth aspects of the present invention, when the cooling is performed by using the radiation panel, the cool air is uniformly blown out from almost the entire surface material through the plurality of through holes. Since this cold air pushes the indoor air away from the surface of the surface material, the surface of the surface material is uniformly covered with the cold air, so even if the temperature of the cold air in the cavity is lower than the dew point temperature of the indoor air, the surface of the surface material is There is no condensation on. Further, since the surface of the surface material is cooled by the cool air blown through the through holes and the cool air in the cavity, the surface temperature of the surface material becomes extremely close to the cool air temperature, so that effective cooling by radiant heat is achieved. Is realized.

[Brief description of drawings]

FIG. 1 is a piping diagram showing an embodiment of a radiation cooling device according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a radiation panel.

FIG. 3 is a cross-sectional view showing another example of the radiation panel.

FIG. 4 is a cross-sectional view showing another example of the radiation panel.

FIG. 5 is a cross-sectional view showing another example of the radiation panel.

FIG. 6 is a cross-sectional view showing another example of the radiation panel.

[Explanation of symbols]

 1 Radiant Cooling Device 3 Cooler 5 Blower 7 Radiant Panel 9 Panel Circulation Duct 11 Cavity 15 Surface Material 100 Through Hole

Claims (8)

[Claims] 1. A radiant cooling device for cooling a conditioned room by radiant heat of a radiant panel, wherein cool air is blown into a cavity of the radiant panel, and a surface material of the radiant panel is provided with a large number of through holes capable of blowing cold air. A radiation cooling device characterized in that 2. A radiant cooling device that cools a conditioned room by radiant heat of a radiant panel by allowing cool blast to flow into the cavity of the radiant panel, wherein the surface material of the radiant panel has a hole diameter of 1 mm capable of blowing cool air.
A radiation cooling device, characterized in that the following large number of through holes are provided at hole intervals of 10 mm or less. 3. The radiation cooling device according to claim 1, wherein an uneven portion is formed on the surface of the surface material. 4. A radiant cooling device that cools a conditioned room by radiant heat of a radiant panel by causing cool air to flow into the cavity of the radiant panel, wherein cool air can be blown from the back surface to the surface of the surface material of the radiant panel. The radiant cooling device is characterized in that a through hole that gradually expands is provided, and the hole diameter on the front surface of the through hole is at least twice the hole diameter on the back surface. 5. A radiant cooling device that cools a conditioned room by radiant heat of a radiant panel by causing cool air to flow into the cavity of the radiant panel, wherein cool air can be blown onto the surface material of the radiant panel from the back surface to the front surface. A radiant cooling device characterized by having a through hole that spreads like a trumpet. 6. A radiant cooling device for cooling a conditioned room by radiant heat of a radiant panel by causing cool air to flow into the cavity of the radiant panel, wherein an uneven portion is formed on a surface of a surface material of the radiant panel, A radiant cooling device characterized in that a through hole capable of blowing cold air is provided substantially in the center of the recess. 7. The radiation cooling device according to claim 4, wherein the through holes have a hole interval of 30 mm or less. 8. The radiation cooling device according to claim 1, wherein the surface material is made of aluminum.