JPH05240468A - Radiation air conditioner - Google Patents

Abstract

PURPOSE:To obtain high cooling and heating capacity with simple structure by a method wherein a heat medium conducting pipeline, coated with a film high in the absorbing rate and radiating rate of heat radiation beams on the outer surface thereof, is arranged at a position near the ceiling of a room to be air-conditioned while the pipeline is connected to a cold and hot heat source generator installed at the outside of the room to be air-conditioned. CONSTITUTION:A hollow pipeline 2 or a heat exchanger is arranged in a space near the ceiling 1a in a room 1 to be air-conditioned while the hollow pipeline 2 is connected to a cold heat and hot heat source generator 3 through a transfer pipeline 4. A coating film, high in the absorbing rate and the radiating rate of heat radiation beams and formed by coating conventional coating for wall surface, for example, is formed on the outer surface of the hollow pipeline 2. A louver (light dispersing plate and the like) 5, capable of conducting air freely, is arranged below the hollow pipeline 2 if necessary in order to make it hard to see the array of the hollow pipeline 2 directly from a living space. When the louver 5 is provided in such a manner, the surface of the louver 5 is also coated with a coating film of a material high in the absorbing rate and the radiating rate of heat radiation beams.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation air conditioner,
In particular, the present invention relates to a radiant air conditioner that utilizes radiant heat transfer and further promotes convective heat transfer.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 59-17363.
Radiation panel described in Japanese Patent Laid-Open No. 7-70, JP-A-59-170629
The air-conditioning panel described in Japanese Patent Laid-Open Publication No. 2003-53242 has a hollow pipe closely adhered to a metallic flat plate, and a cold / hot heat source fluid (heating medium) is circulated in the hollow pipe to absorb the flat plate and serve as a heat transfer surface for radiating heat. The back of the ceiling is insulated to prevent heat loss. An example thereof is shown in FIGS. 4 and 5.
FIG. 4 is a perspective view showing the configuration of a radiation air conditioner using a conventional radiation panel, and FIG. 5 is a sectional view showing the configuration of a conventional radiation panel. In FIG. 4, 1 is a room related to the air-conditioned room,
2a is a radiant panel that constitutes a ceiling plate, 3 is a cold / hot heat source generator installed outdoors, and 4 is a pipe for conveying a cold / hot heat medium that connects the cold / hot heat source generator 3 and the radiant panel 2a. In the radiation panel 2a, as shown in FIG. 5, a heat transfer tube 7 (hollow pipe) is adhered to the back surface of the metal flat plate 6 via a heat transfer tube retainer 8, and a heat insulating material 9 is applied to the back surface of the metal flat plate 6. There is.

[0003]

In the above-mentioned prior art, since it is necessary to adhere a hollow pipe to a flat plate and to insulate the back surface of the ceiling, the structure becomes complicated and the manufacturing cost becomes high. Also, since only one side can be used for heat exchange,
There was a problem that the cooling and heating capacity could not be increased.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and has a simple structure by using a heat exchanger for radiating heat as a heat medium distribution pipe for conveying a cold / hot heat source fluid. It is an object of the present invention to provide a radiant air conditioner which is inexpensive, inexpensive, and has a large cooling and heating capacity.

[0005]

In order to achieve the above object, the structure of the radiant air-conditioning apparatus according to the present invention comprises a cold heat source generator provided outside the air-conditioned room and a heat medium connected to the cold heat source generator. With a distribution pipe, in the space near the ceiling in the room,
A cold / hot heat source fluid is circulated in the pipe, and a heat medium circulation pipe having a coating film having a high absorption rate and a high emissivity of heat radiation is arranged on the outer surface of the pipe. Furthermore, a louver capable of freely circulating air is provided below the heat medium flow pipe, and the surface of the louver has a coating film having a high absorption rate and a high emissivity of thermal radiation. It was formed in.

[0006]

The heat medium flow pipe itself coated with a coating having high absorptivity and emissivity of heat radiation is used as a heat exchanger and is installed in the space near the ceiling, so that it can be used for conventional metal flat plates and ceiling back surfaces. It does not require heat insulation and has a simple structure and can be manufactured at low cost. The thermal radiation is always radiated according to the surface temperature, and the higher the temperature is, the more the radiation is. The radiation lowers the temperature of the surface. When the heat radiation reaches a certain surface, it absorbs, transmits, and reflects like light. The absorbed thermal radiation turns into thermal energy, raising its surface temperature. Therefore, between surfaces having different temperatures, heat is transferred from a high temperature to a low temperature, and radiative heat transfer is performed.

In the present invention, for example, during cooling, the heat in the air-conditioned space can be removed by circulating the cold heat source fluid in the pipe so that the surface temperature of the pipe becomes lower than the surrounding wall temperature. Here, a large amount of radiant heat transfer can be obtained by applying a coating film having high absorptivity and emissivity of thermal radiation to the surface of the pipe. Further, in the present invention, the heat medium (cooling / heating heat source fluid) distribution pipe is arranged in the space near the indoor ceiling, and air convection is possible above and below the pipe, so that only the indoor flat plate surface is the heat transfer surface. Compared with the conventional radiant panel, the convection heat transfer is larger, and the heat absorption and heat dissipation can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a perspective view showing the configuration of a radiation air conditioner according to an embodiment of the present invention, FIG. 2 is a sectional view showing an arrangement example of hollow pipes arranged in a space near an indoor ceiling, and FIG. It is a perspective view which shows the structure of the radiation air conditioner which arrange | positioned the louver under the piping of FIG. In FIG. 1, the same reference numerals as those in FIG. 4 indicate the same parts as those in the prior art. In FIG. 1, a hollow pipe 2 relating to a heat medium distribution pipe is arranged as a heat exchanger in a space near a ceiling 1a in a room 1, and the hollow pipe 2 and a cold / heat source generator 3 are connected via a transfer pipe 4. Connect
It constitutes one air conditioner. The surface of the hollow pipe 2 is coated with a general wall coating having a high absorption rate and a high emissivity of thermal radiation. As this paint, a commercially available white, matte paint is used and is applied to a film thickness of about 100 μm.

FIG. 2 shows an arrangement example of the hollow pipe 2. The pitch of each pipe row is 120 mm, and the distance from the ceiling 1a is 104.
mm. The heat transfer from the piping surface to the room includes heat transfer by convection and heat transfer by radiation. Convective heat transfer
Heat is transferred from the surface of the pipe to the air that flows vertically between the rows of pipes, and radiant heat transfer is the transfer of heat from the surface of the pipe to the surfaces of the ceiling, wall surface, floor surface, objects, etc. in the room by heat radiation. is there. In this embodiment, the value per unit heat transfer area obtained by dividing the total value of the heat transfer amounts due to the above two types of heat transfer by the pipe surface area is divided by the flat surface area by the radiant heat transfer amount by the conventional radiation panel. When the value per heat area was compared with the actual measurement data during cooling, a 37% improvement in the amount of transfer was observed.

Next, in the example of FIG. 3, in order to make it difficult for the arrangement of the hollow pipes 2 to be directly seen from the living space in the configuration of FIG. 1,
Louvers 5 that allow air to flow freely under the pipes
(A diffuser plate or the like) is provided. Part of the heat radiation from the wall surface directly reaches the hollow pipe 2, and part of the heat radiation is reflected by the louver 5 before reaching the hollow pipe 5. further,
The surface of the louver 5 may be formed of a material or a coating having a high absorptivity and emissivity of thermal radiation. Since the louver 5 is closer to the hollow pipe 2 which is a heat exchanger, it can be expected that the temperature becomes lower than that of the louver 5 in the case of cooling. This results in a more comfortable temperature environment for people indoors. According to the present embodiment, by arranging the hollow pipe, which is generally used to convey the heat transfer fluid, in the space near the indoor ceiling, it becomes possible to use it as a heat exchanger using radiation. Thus, it is possible to provide a radiation-use air conditioner that has a simple structure, is inexpensive, and has a large cooling and heating capacity.

[0011]

As described in detail above, according to the present invention, a heat medium distribution pipe for conveying the cold and hot heat source fluid is provided in the space near the ceiling in the room to provide a heat exchanger utilizing radiation. As a result, it is possible to provide a radiant air conditioner that has a simple structure, is inexpensive, and has a large cooling and heating capacity.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a radiation air conditioner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an arrangement example of hollow pipes arranged in a space near an indoor ceiling.

FIG. 3 is a perspective view showing a configuration of a radiant air conditioner in which a louver is arranged below the pipe of FIG.

FIG. 4 is a perspective view showing a configuration of a radiation air conditioner using a conventional radiation panel.

FIG. 5 is a cross-sectional view showing a configuration of a conventional radiation panel.

[Explanation of symbols]

 1 Room 1a Ceiling 2 Hollow pipe 3 Cold / heat source 4 Transport pipe 5 Louver

Claims (3)

[Claims] 1. A cold / heat source generator provided outside an air-conditioned room,
With a heat medium distribution pipe connected to the cold heat source generator,
In the space near the ceiling in the room, a cold and heat source fluid is circulated in the pipe, and a heat medium distribution pipe having a coating film having a high absorptivity and emissivity of heat radiation is arranged on the outer surface of the pipe. Radiant air conditioner. 2. The radiant air conditioner according to claim 1, wherein a louver through which air can freely flow is disposed below the heat medium circulation pipe. 3. The radiant air conditioner according to claim 2, wherein the surface of the louver is formed of a coating film having high absorptivity and emissivity of thermal radiation.