JPH04186031A - Radiation type air conditioner - Google Patents

Abstract

PURPOSE:To simplify the structure and improve the degree of freedom of installation by covering a radiation surface of a radiation panel by a heat insulating film comprising an infrared transparent material and preventing condensation onto the radiation surface at cooling time, maintaining cooling and heating capacities at a high level. CONSTITUTION:A radiation surface 1a of a radiation panel 1 is covered with a predetermined thickness heat insulating film 5 yielded by expanding infrared transparent synthetic resin into an independent air bubble structure, whereby room air is prevented from coming into contact with the radiation surface 1a. Hereby, there is eliminated the possibility of producing condensation on the surface of the radiation surface 1a in the case of cooling operation, and hence the structure of a radiation type air conditioner Z1 is simplified.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a radiant air conditioner using a radiant panel.

(Prior art) In recent years, due to the demand for CFC-free air conditioners, research has been conducted on radiant air conditioners that use radiant panels to perform radiant cooling or radiant heating (for example, [Air conditioning and sanitary engineering]) (See Vol. 59, No. 4, pp. 59-66).

(Problem to be Solved by the Invention) By the way, in conventional radiant air conditioners, the radiant surface of the radiant panel was generally exposed directly to the air-conditioned space, so it was difficult to solve the problem, especially during cooling operation. In,
There is a possibility that dew condensation may occur on the radiation surface.

For this reason, the set temperature of the radiant panel during cooling operation has generally been set to a relatively high temperature of about 16 degrees when the indoor temperature is 25 degrees, but when the set temperature is this high, the amount of heat absorbed by the radiation of the radiant panel increases. Because there is less air conditioning capacity.

In addition, if the set temperature is set relatively low, it is natural that condensation may occur, so it is necessary to take measures to collect droplets caused by condensation. In order to prevent dripping on the surface side, it is necessary to take measures such as installing the radiant panel at an angle, which also poses a problem in that the degree of freedom in its installation is inhibited.

Therefore, the present invention has developed a radiant type that maintains a high level of cooling and heating capacity while preventing dew condensation on the radiant surface especially during cooling, simplifying the structure and increasing the degree of installation freedom. The aim is to provide air conditioners.

(Means for solving the problem) In the present invention, as a specific means for solving the problem, (+) In the invention according to claim 1, as illustrated in FIGS. 1 and 2, thermal radiation Alternatively, in a radiant air conditioner equipped with a radiant panel l that emits cold radiation, the radiant surface 1a of the radiant panel 1 is covered with a heat insulating film 5 made of an infrared transparent material, (II) Claim 2 In the invention described above, as illustrated in FIG. 1, in the invention according to claim 1, the heat insulating membrane 5 is made of a foam material having a closed cell structure, (III) the invention according to claim 3. Now, as illustrated in FIG. 2, in the invention according to claim 1, the heat insulating film 5 is constructed by laminating a plurality of film materials in close contact with each other, (IV) Claim The invention set forth in claim 4 is characterized in that, in the inventions set forth in claims 1 to 3, the radiant panel l is constituted by an electronic refrigeration element 2, as illustrated in FIGS. 1 and 2.

(Function) Since each of the inventions of the present application has such a structure, (1) in the invention according to claim 1, since the radiation surface of the radiation panel is covered with a heat insulating film made of an infrared transparent material, the radiation surface and Radiant heating and cooling are made possible in a state where there is no heat load due to heat transfer from indoor air to the radiant surface due to contact with indoor air, and especially during cooling, there is no condensation latent heat load due to condensation of moisture in the air. (11) In the invention according to claim 2, in addition to the effect described in (1) above, since the heat insulating film is made of a foam material with a closed cell structure, air convection within the heat insulating film is possible. (iii) In the invention according to claim 3, in addition to the effect of (1) above, the heat insulating film causes the film materials to adhere to each other. (1) In the invention as claimed in claim 4, the above-mentioned (1-111)
In addition to this effect, even if a radiant panel uses an electronic refrigeration element whose refrigerating capacity is relatively small due to its characteristics, the heat load due to heat transfer or condensation latent heat load is eliminated, so the ability of the radiant panel can be reduced by radiating. The electronic refrigeration element can be fully utilized for heating or radiant cooling, and the refrigerating capacity of the electronic refrigeration element can be substantially improved.

(Effects of the Invention) Therefore, according to the radiant air conditioners of the inventions of the present application, the following effects can be obtained.

■According to the invention described in claim 1, radiant heating and radiant cooling using the radiant panel can be performed without a heat load due to heat transfer from the air, and in particular, during cooling operation, it is possible to perform radiant heating and radiant cooling without condensing latent heat load. , heating or cooling performance can be further improved by radiation.

In addition, especially in the case of a ceiling-mounted type, there is no fear of droplets falling due to condensation during cooling, so the structure itself can be simplified and the degree of freedom of installation can be improved.

Furthermore, since there is no condensation during cooling, the set temperature of the radiant panel is set below the indoor dew point temperature during operation.
It also has the effect of lowering the perceived temperature of indoor occupants more than ever before, further improving comfort during cooling.

■According to the inventions described in claims 2 and 3, in addition to the effect (2) above, the heat insulation performance can be improved without causing a decrease in radiation performance, so that the heating and cooling performance by radiation can be further improved. The effect of being able to achieve this goal is obtained.

■According to the invention as claimed in claim 4, in addition to the effects of (1) and (2) above, since the original ability of the radiant panel can be fully utilized for heating and cooling, it is mainly used as a supplement because the refrigeration capacity is small. The effect is that it becomes possible to use a radiant air conditioner using an electronic refrigeration element, which has been used as a main air conditioner, as a main air conditioner.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First Embodiment FIG. 1 shows a radiant air conditioner Z1 according to an embodiment of the invention as set forth in claims 1.2 and 4 of the present application.

This radiant air conditioner Z includes a plurality of electronic refrigeration elements 2, 2 . It has a radiant panel 1 which is formed by sandwiching both sides of . . . between a front panel 3 and a rear panel 4 and integrating them into a panel shape. The front panel 3 and the rear panel 4 are each made of a material with good thermal conductivity, such as a steel plate, and in this embodiment, the surface of the front panel 3 is the radiation surface 1a of the radiation panel l. becomes.

This radiation panel l includes each electronic refrigeration element 2.2.
It generates heat or absorbs heat (cools) by switching the direction of direct current supplied to it, and the amount of heat generated or absorbed can be arbitrarily changed by changing the supplied current value. The above radiation surface 1a
The room 10 is radiantly heated or cooled by heat generation or heat absorption.

Furthermore, this radiant panel 1 has a radiant surface 1a having a predetermined thickness (for example, a maximum thickness of about 10 mm) made by foaming an infrared transparent synthetic resin (for example, polyethylene, etc.) into a closed cell structure. It is covered with a membrane 5.

In this way, when the radiant surface 1a of the radiant panel I is covered with the heat insulating film 5, the contact between indoor air and the radiant surface 1a is cut off by the heat insulating film 5, so that the surface of the radiant surface 1a during cooling operation is Therefore, there is no need to provide a collection means for droplets caused by condensation as in the prior art, and the structure of the radiant air conditioner ZI can be simplified accordingly.

In addition, since the heat insulating film 5 has infrared transmittance, not only does it have no effect on the radiation action of the radiating surface 1a of the radiant panel 1, but also the heat insulating film 5 prevents heat from the indoor air on the radiating surface 1a. Since the transfer is prevented, there is no heat load due to heat transfer, and especially during cooling, there is no condensation on the radiant surface 1a, so there is no heat load due to condensed latent heat.
Radiant heating or cooling can be performed with a lower heat load. As a result, a high level of thermal efficiency is achieved, and heating and cooling performance improves accordingly.

Furthermore, when the heat insulating film 5 is made of a foam with a closed cell structure as in this embodiment, air convection inside the heat insulating film 5 is prevented as much as possible, so that the It is possible to obtain heat insulation performance, and as a result, it contributes to improving the performance of the radiant air conditioner Z.

The present invention can be applied not only to a radiant air conditioner using an electronic refrigeration element type radiant panel as in this embodiment, but also to a radiant air conditioner using a refrigerant type radiant panel. In particular, when applied to an electronic refrigeration element type radiant air conditioner Z+ as in this embodiment, the effect is more remarkable. In other words, - A radiant air conditioner using an electronic refrigeration element for boat fishing has a smaller refrigerating capacity than a radiant air conditioner using a refrigerant. Since it was difficult to operate due to operational costs, etc., it was used exclusively as an auxiliary device.

However, as in this embodiment, the radiation surface 1 of the radiation panel l
When a is covered with a heat insulating film 5, the heat load itself on the radiant panel 1 is small as described above, so its capacity can be fully utilized for heating and cooling, and as a result, the capacity of the radiant panel 1 is reduced. This substantially improves the air conditioner, making it possible to use it as the main radiant air conditioner for indoor heating and cooling.

Furthermore, in the above embodiment, a wall-mounted type air conditioner is shown, but the radiation type air conditioner of the present invention can of course be used not only as a wall-mounted type but also as a ceiling-mounted type, especially when it is installed on a ceiling. Since there is no need to take measures against condensation such as arranging the radiant panel at an angle as in the past, the degree of freedom in installation is increased, and its versatility is improved accordingly, making the effects even more noticeable. .

Second Embodiment FIG. 2 shows a radiant air conditioner Zt according to an embodiment of the invention set forth in claims 1.3 and 4 of the present application. This radiant air conditioner Z has the same basic structure as that of the first embodiment, and includes electronic refrigeration elements 2.2.・・・
and a radiant surface 1a of the radiant panel 1.
A heat insulating film 5 made of an infrared transparent material covers the.

However, whereas in the above embodiment the heat insulating film 5 was made of foam, in this embodiment the heat insulating film 5
is constructed by laminating multiple layers of film materials made of a large number of infrared-transparent materials in close contact with each other (in an airtight state) to a predetermined thickness.

When the heat insulating film 5 has such a configuration, the heat insulating film 5
Since there is no air convection inside, its insulation performance is even higher than that of foam structures, making it possible to obtain higher heating and cooling capabilities.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a radiant air conditioner according to a first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a radiant air conditioner according to a second embodiment. ■...Radiation panel 1a...Radiation surface 2...Electronic refrigeration element 3.4...Panel 5...Insulating film lO...Indoor

Claims (1)

[Claims] 1. A radiant air conditioner equipped with a radiant panel (1) that emits heat or cold radiation, wherein the radiant surface (1a) of the radiant panel (1) is made of an infrared transparent material. A heat insulating film (5
) A radiant air conditioner characterized by being coated with. 2. The radiant air conditioner according to claim 1, wherein the heat insulating membrane (5) is made of a foam material having a closed cell structure. 3. The radiant air conditioner according to claim 1, wherein the heat insulating film (5) is constructed by laminating a plurality of film materials in close contact with each other. 4. The radiant air conditioner according to claim 1, wherein the radiant panel (1) is composed of an electronic refrigeration element (2).