JP3311598B2 - Radiant cooling and heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiant cooling and heating apparatus, and more particularly to a radiant cooling and heating apparatus that absorbs radiant heat from a human body during cooling and emits far-infrared rays during heating. Used in offices, etc.

[0002]

2. Description of the Related Art In general, a forced convection type cooling system is used from home use to business use. In the forced convection type cooling, room air is cooled by a heat exchange unit, and the cooled air is blown into the room to perform cooling. However,
In the case of this forced convection type cooling, the temperature of the indoor air is to be lowered to cool the room. Therefore, the temperature of the heat exchanger is much lower than the desired room temperature. Is big.

Radiation cooling has recently attracted attention for providing a comfortable cooling environment for the forced convection cooling. In radiant cooling, a part of a building constituting a building, such as a ceiling or a floor, is used as a radiation surface such as a radiation panel, and the radiation surface absorbs radiant heat from a human body to obtain a sense of cooling. In the case of the radiant cooling system, it is expected that a comfortable cooling space can be realized because the temperature distribution in the room is uniform and an unpleasant fast airflow unlike the forced convection cooling is not generated. Similarly, in the case of the radiant heating method, since a forced airflow does not occur, it is expected that a comfortable heating space can be realized.

However, in this radiant cooling system, the radiant panel surface such as a ceiling or a floor is maintained at about 20 ° C., and the temperature difference from room air is made smaller than in the forced convection system.
If the humidity is high, there is a new problem that dew condensation occurs on the panel surface. For this reason, in the conventionally proposed radiant cooling system, a dehumidifier has to be used in combination.

[0005]

However, it is practically difficult to install a dehumidifier in terms of installation space and cost, and it is not possible to save energy or to increase the cost as compared with the forced convection type. I am worried about it. In addition, the indoor air is contaminated because it requires more cooling energy for the heat generated from the dehumidifier, and because it is necessary to prevent outdoor air with high temperature and humidity from being ventilated frequently. There was a problem. Therefore, as a radiant cooling device capable of preventing dew condensation on the radiant panel surface, for example, a device described in JP-A-6-323577 has been developed.

In the radiant cooling device described in Japanese Patent Laid-Open No. Hei 6-323577, a concave portion is provided in a heat insulating container incorporated in a ceiling or the like, a radiant cooling panel is arranged in the concave portion, and infrared rays are transmitted through the radiant cooling panel. And a vacuum heat insulating layer is formed between the polymer thin film and the radiation cooling panel. The vacuum heat insulating layer prevents heat transfer due to conduction and convection, and the surface temperature of the polymer thin film that comes into contact with the outside air is almost equal to room temperature and does not become lower than the dew point, so that dew condensation on the surface of the polymer thin film can be prevented. Things.

However, in the radiant cooling device described in Japanese Patent Application Laid-Open No. Hei 6-323577, a heat insulating container for disposing a radiant cooling panel becomes large, and a vacuum pump, a vacuum valve, and the like are required attached to a vacuum heat insulating layer. However, sufficient consideration was not given to the complicated structure and the high cost. Furthermore, an air layer having a low water vapor pressure concentration is provided in the gap between the cooling plate and the surface member, as in the radiant air conditioner described in JP-A-5-203199.
As in the radiation cooling / heating method and the panel structure described in 193915, an air convection layer is provided between the radiator and the film material. However, there is a problem that the configuration is complicated and the cost increases. In addition, it did not mention the radiation performance of the panel surface.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the first invention is to provide a dehumidifier which has a compact structure, prevents dew condensation on the surface of a radiation panel, and requires a dehumidifier. And cooling with a large amount of heat removed
An object of the present invention is to provide a radiant cooling / heating device capable of heating. Another object of the second invention is to connect a secondary cycle system having a radiation panel to the air conditioner main body via a distribution unit,
An object of the present invention is to provide a radiant cooling and heating device that uses an air conditioner main body and a secondary cycle system in addition to a comfortable cooling and heating operation and does not require a dehumidifier. Still another object is to provide a radiation cooling / heating device having good workability for a building or the like.

[0009]

In order to achieve the first object, a radiation cooling / heating apparatus according to the present invention comprises a radiation cooling / heating apparatus provided with a radiation panel using cold water or hot water as a medium. In the apparatus, the radiating panel includes a base material, a pipe for circulating the cold water or hot water embedded in a groove provided in the base material, and a pipe attached to the base material so as to be in close contact with the pipe and an opposite pipe surface. a thin aluminum plate which has been subjected to infrared release I促 <br/> advances processing to the side, front Symbol thin aluminum
It is obtained by a sulfonium plate infrared release I促 proceeds in contact with the treated surface an infrared-absorbing material which is provided so as to cover the low thermal conductivity shield.

That is, the first invention is to embed a pipe through which cold or hot water flows in a groove provided in a base material so that at least about one-half of the circumference of the pipe is in close contact with the pipe. which infrared release I促 advances treated thin aluminum plate, attached to the substrate so as to close the said pipe, further provided with a shielding plate made of a material with infrared absorbing so as to cover the infrared release I促 advances the processing surface It is.

[0011] Specifically, infrared release I促 advances the process to the ceramic processing baked coated infrared <br/> release Inuri fees, infrared absorbent is made of a material shielding plate is a transparent resin plate,
The base material is made of a flexible heat insulating material such as a soft urethane foam, and a groove for embedding half or more of the circumference of the pipe is provided in the base material serving as the heat insulating material. By pushing the pipe in by utilizing the deformation with the base material, the pipe can be attached to the base material without requiring a special pipe fixture. Other absorbs radiant heat emitted from the human body during cooling, by heating during combination of the thin aluminum plate which has been subjected to infrared release I促 advances processing to radiate far infrared rays, the efficient cooling, in which the heating is possible is there.

Here, the shielding plate made of a material having an infrared absorbing property is a shielding plate having an infrared emitting property. because,
According to Kirchhoff's law, the ratio of the energy radiated from the surface of the object (radiation emission) to the absorbed energy of the substance is determined by the temperature of the object and the wavelength of the electromagnetic wave, and does not depend on what the object is. At the same temperature and the same wavelength, (radiation emittance of object) / (absorbance of object) = (radiation emittance of black body) / (absorbance of black body) Deformation gives (radiation emittance of the object) / (radiation emittance of the black body) = (absorptivity of the object), and the emissivity is the ratio of the radiation emittance of the object and the radiation emittance of the black body at the same temperature (Emissivity) = (absorptance) for the same object, indicating that a material having a good infrared absorptance has a good infrared emissivity.

Further, since the thin aluminum plate cooled or heated for cooling or heating the room is covered with the shield plate, the shield plate plays a role of heat insulation, and the temperature of the thin aluminum plate decreases during heating. Further, since the temperature rise during cooling can be suppressed, the radiation performance can be improved. In addition, it is possible to suppress the occurrence of dew condensation on the surface of the shielding plate due to a temperature difference from the room during cooling. Furthermore, in the present invention, since the pipe housing portion formed by the base material and the thin aluminum plate is a space where air convection does not occur, the air in the space contributes to the formation of condensation. Nothing. In addition, since sealing is performed so that air does not enter between the base material and the thin aluminum plate and between the thin aluminum plate and the shielding plate, there is no dew condensation inside due to invading air.

Further, since a screw for fixing the base material to the ceiling and the like and a screw for fastening the thin aluminum plate and the shielding plate are separately provided, the base material is fixed and a pipe is laid.
The workability is improved because the thin aluminum plate and the shielding plate can be fixed.

Here, the function of the technical means of the first invention will be further described. In the first invention, a pipe through which cold water and hot water pass (a pipe made of synthetic resin) is incorporated so as to be in close contact with a groove formed by the soft heat insulating material, so that most of the pipe is covered with the heat insulating material. Has become. There is almost no air containing moisture in this close part, and there is no concern about dew condensation, and heat exchange with the thin aluminum plate is performed efficiently.

On the other hand, the portion not in close contact with the heat insulating material is covered with a shielding plate having low thermal conductivity via the thin aluminum plate, so that the temperature of the thin aluminum surface decreases due to convection and decreases during heating and cooling. The radiation performance can be improved because the temperature rise at the time can be suppressed. In addition, the surface of the shielding plate facing the thin aluminum plate has a low temperature approaching the temperature of the thin aluminum plate, but the low thermal conductivity suppresses the decrease in the surface temperature of the side facing the room, resulting in condensation. Can be suppressed.

In the present invention, by using the far infrared release I促 advances processing to emit infrared (ceramic processing) the thin aluminum plate, since with a further shielding plate made of an infrared-absorbing material so as to cover the surface, At the time of cooling, the shielding plate absorbs the radiant heat from the human body in the room, further enhancing the refreshing feeling. Further, at the time of heating, radiate infrared radiating far infrared rays
Promoting processes far infrared rays radiated from the (ceramic processing) the thin aluminum plate the shield to absorb radiation, in which warm the human body in the room by the far infrared from the inside.

Next, in order to achieve the second object,
The configuration of the second invention of the radiant cooling and heating device of the present invention is a heat pump air conditioner in which an outdoor unit and an indoor unit are connected on a refrigeration cycle, and in the middle of the refrigeration cycle of the air conditioner, via a distribution unit. A secondary cycle system having a radiation panel using cold water or hot water as a medium is connected.

More specifically, a second invention is directed to a radiant cooling / heating apparatus provided with a radiant panel using cold water or hot water as a medium, wherein at least an outdoor unit having a compressor and an outdoor heat exchanger; An indoor unit having a heat exchanger, a distribution unit provided between the outdoor unit and the indoor unit and having a medium heat exchanging unit, a heat exchanging unit for exchanging heat in the medium heat exchanging unit, and a radiant panel are provided. And a secondary cycle system.

In the radiation panel used in the second invention, a pipe through which cold water or hot water flows is embedded in a groove provided in the base material so that at least one half of the circumference of the pipe is closely contacted with the pipe. A thin aluminum plate ceramic-treated on the pipe surface side is attached to a substrate so as to be in close contact with the pipe. Specifically, the base material is made of a flexible heat insulating material such as a soft urethane foam, and a groove is provided on the base material serving as the heat insulating material so as to closely contact at least half of the circumference of the pipe. By pushing in the pipe using the deformation of the synthetic resin pipe and the base material, the user can switch to the operation of the conventional air conditioner and air conditioner plus radiant panel or the operation of the radiant panel alone It is one that can be easily operated selectively.

Therefore, when the air-conditioning load is large, such as when starting up the operation, the air conditioner can be operated with a large capacity, and when the air conditioner is stable, the operation can be switched to the operation of the radiant panel, thereby improving the comfort. Further, at the time of cooling operation, the air conditioner is operated at the start-up of the operation, the indoor humidity is reduced by dehumidification, and the dew point temperature is reduced, whereby the occurrence of dew condensation on the radiation panel can be suppressed.

Further, in the second invention, a first pressure reducer connected to the indoor heat exchanger and a second pressure reducer connected to the medium heat exchanger for cooling the secondary cycle system are provided in the distribution unit. It is a thing. Therefore, a secondary cycle system can be easily added to the existing air conditioner body.
The decompressor provided in the distribution unit is an electric expansion valve, which detects the cycle temperature in the distribution unit and controls the temperatures of the air conditioner side cycle and the secondary cycle side, respectively. .

Here, the operation of the technical means of the second invention will be further described. In the second invention, cold water or hot water is used as a medium in the secondary cycle system connected via the distribution unit. Therefore, the secondary cycle system includes the piping system of the air conditioner main body. As described above, a synthetic resin pipe is sufficient without using a pipe (copper or aluminum) made of a material that can withstand high pressure. In addition, since the synthetic resin pipe through which cold or hot water passes is incorporated so as to be in close contact with the groove formed by the soft heat insulating material,
Most of the pipes are covered with insulation. There is almost no air containing moisture in this close part, and there is no concern about dew condensation, and heat exchange with the thin aluminum plate is performed efficiently.

On the other hand, the portion not in close contact with the heat insulating material is covered by a transparent resin plate (shielding plate) having low thermal conductivity via the thin aluminum plate, so that the surface temperature of the thin aluminum is reduced during heating by convection. Therefore, the radiation performance can be improved because the temperature decrease and the temperature increase during cooling can be suppressed. In addition, the surface of the shielding plate facing the thin aluminum plate has a low temperature approaching the temperature of the thin aluminum plate, but the low thermal conductivity suppresses the decrease in the surface temperature of the side facing the room, resulting in condensation. Can be suppressed.

On the other hand, in the second invention, a ceramic-treated thin aluminum plate is used, and an infrared absorbing shielding plate is used to cover the thin aluminum plate. The shielding plate absorbs the radiant heat to further enhance the refreshing feeling. Further, at the time of heating, far infrared rays are radiated from the shielding plate to heat a human body in the room from the inside.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. [Embodiment 1] First, an embodiment of the first invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of a radiant cooling / heating device showing an embodiment of the first invention, FIG.
3 is a detailed partial cross-sectional view of the radiating panel of FIG. 1, FIG. 3 is a plan view illustrating the arrangement of pipes on a substrate, and FIG.
5 is a cross-sectional view showing a state in which the radiant panel of FIG. 2 is mounted on a ceiling.

In FIG. 1, reference numeral 1 denotes a cold water or hot water generator.
Cold water of about 5 ° C is produced, and warm water of about 50 to 70 ° C is produced during heating. Reference numeral 2 denotes a room where the user lives.
Reference numeral 3 denotes a radiation panel attached to the ceiling surface of the room 2. The radiant panel 3 serves as a heat exchanger, and serves to lower the air temperature in the room 2 to about 26 ° C. during cooling, and also serves to raise the indoor air temperature to 23 ° C. or higher during heating. Fulfill. 4 and 5 are
A pipe circulates between the cold / hot water generator 1 and the radiant panel 3, 4 is a feed pipe, and 5 is a return pipe.

Next, the detailed structure of the radiation panel 3 shown in FIG. 2 will be described. In FIG. 2, reference numeral 6 denotes a substrate made of a soft heat insulating material having a certain degree of flexibility such as a soft urethane foam, 7 denotes a resin (for example, polyethylene) pipe through which cold water or hot water flows, and 8 denotes an opposite pipe surface. A thin aluminum plate 9 having an infrared radiation enhancement treatment (described later) on its side, a resin (for example, acrylic plate) transparent plate relating to a shielding plate provided to cover the infrared radiation enhancement treatment surface of the thin aluminum plate 8; 10 is a pipe 7 provided on the base material 6
This is a mounting groove. That is, the radiating panel 3 includes the base material 6, the resin pipe 7, the thin aluminum plate 8, the resin transparent plate 9, and the like. This radiation panel 3
As shown in FIG. 1, is mounted on the ceiling surface of the room 2 and is formed to be almost the same size as the ceiling.

As shown in FIG. 2, the groove 10 for attaching the pipe 7 is formed to have a diameter substantially equal to or slightly smaller than the outer diameter of the resin pipe 7. And resin pipe 7
When this is mounted in the groove 10, at least one half of the circumference of the resin pipe 7 is formed so as to be in close contact with at least the base material 6 which is a heat insulating material. Therefore, the heat of the resin pipe 7 is transmitted only to the thin aluminum plate 8 side. The resin pipe 7 can be incorporated in the groove 10 tightly by using deformation of the base material 6 and the resin pipe 7 without using a special fixture.

The thin aluminum plate 8 has a thickness of 0.1 mm.
About 0.1 mm to 0.5 mm, and the resin pipe 7
, So as to be in close contact with each other as shown in FIG. In other words, a portion where the resin pipe 7 is not in close contact with the base material 6 which is a heat insulating material (a portion of the pipe diameter is パ イ プ) is attached so as to be in close contact with the thin aluminum plate 8.

Further, the far infrared release Inuri charge on the surface of the counter-pipe side of the thin aluminum plate 8 is painted baked,
So-called ceramic processing is performed. This far-infrared radiation paint has ceramics dispersed in the paint and efficiently generates far-infrared light having a wavelength of about 5 μm or more. As the far-infrared radiation paint, a product name of Okitsumo Co., Ltd. “Okitsumo high efficiency radiation paint B
-600 "is commercially available. When the above-described ceramic processing is performed on the thin aluminum plate 8, a thin aluminum plate having a property of absorbing the radiant heat radiated by a person in the room during cooling and emitting the far infrared ray during heating can be obtained.

Further, the resin transparent plate 9 made of a transparent plate such as an acrylic resin covers the ceramic processing surface 8a of the thin aluminum plate 8. This resin transparent plate 9
Not only absorbs and emits the far infrared rays, but also suppresses a decrease in the surface temperature of the thin aluminum plate 8 during heating and an increase during cooling. More specifically, during cooling, the thin aluminum plate 8 that is in close contact with the resin pipe 7 decreases in accordance with the temperature of the cold water, but the temperature of the thin aluminum plate 8 rises due to convection as it is.

Therefore, in the present invention, the resin transparent plate 9 having a heat insulating effect is attached to the surface of the thin aluminum plate 8. 8A shows a case where only the thin aluminum plate 8 is used, FIG. 8B shows a case where a resin transparent plate 9 (acrylic plate having a thickness of 2 mm) is attached to the surface of the thin aluminum plate 8, and FIG. 15 m between the surface and the resin transparent plate 9 (acrylic plate with a thickness of 2 mm)
In this figure, the surface temperature of the thin aluminum plate and the heat exchange amount are compared for the case where the air retention layer of m is provided. At this time, the size of the radiation panel is 850 mm × 850 mm, the temperature of the circulating water is 10 ° C., the amount of the circulating water is 1.5 liters, and the ambient temperature is 2
5 ° C.

From the figure, when the circulating water temperature is 10 ° C., the surface temperature of the thin aluminum is 23 ° C. in the case of (a),
In the case of (b), it is 21 ° C, in the case of (c), it is 20 ° C,
It can be seen that the rise in surface temperature of the thin aluminum plate is small due to the heat insulating effect of the transparent resin plate. Also, it was found that the amount of heat removed was almost the same in (a) and (b), and in the case of (c), there was almost no convection effect, so there was a problem that the amount of heat removed was very small.

FIG. 9 shows the case where the circulating water temperature is set at 40 ° C. in FIG. 8, and it can be seen from FIG. 9 that the surface temperature of the thin aluminum is 27.5 ° C. for (a) and 29.5 ° C. for (b). , (C)
In the case of the above, the temperature is 31 ° C., and it can be seen that even in the case of heating, the decrease in the surface temperature of the thin aluminum is small due to the heat insulating effect of the transparent resin plate. In addition, although the heat radiation amount is almost the same in (a) and (b), since (c) has almost no convection effect,
It was found that there was a problem that the amount of heat removed was very small. Further, by sealing the periphery of the radiating panel 3 with a sealant such as an adhesive, air can be generated inside the space between the base material 6 and the thin aluminum plate 8 and between the thin aluminum plate 8 and the resin transparent plate 9. Does not enter, and dew condensation does not occur inside.

Next, referring to FIGS. 3 and 4, the base material (heat insulator)
A description will be given of the arrangement of pipes to the pipe. 3 and 4,
Reference numeral 6 denotes a substrate, and reference numeral 10 denotes a groove for mounting a pipe. In FIG.
The grooves are indicated by simple lines so as not to complicate the drawing. As shown in FIG. 3, the pipe mounting groove 10 is mainly provided in a meandering shape on the surface of the base material 6.
In order to attach a pipe to a panel of several panels, extra grooves for straight and curved sections are formed for convenience. A circle 15 indicates a screw hole for fastening the thin aluminum plate 8 and the resin transparent plate 9, and a double circle 16 indicates a screw hole for attaching the substrate 6 to, for example, a ceiling.

Next, a structure for attaching the radiation panel 3 to the ceiling 11 will be described with reference to FIG. In FIG. 5, reference numeral 12 denotes a mounting seat used when mounting the transparent resin plate 9 to the base material 6. As shown in FIG. 5, the mounting seat 12 is buried on the side of the base material 6 which is a heat insulator, and is used for fixing the resin transparent plate 9 laid on the thin aluminum plate 8 to the base material 6 with the screws 13. It is used for In other words, the transparent resin plate 9 is attached to the base material 6 by the screws 13. Reference numeral 14 denotes a screw for fixing the radiation panel. The radiating panel 3 is attached to the ceiling as shown in FIG. A screw 13 for fixing the base material (a screw 14 for fixing the radiation panel) and a screw 13 for fixing the thin aluminum plate 8 and the transparent plate 9 made of resin.
And are provided individually.

The cooling and heating operation by the radiant cooling and heating device having such a configuration will be described. First, during the cooling operation, the cold water / hot water generator 1 produces cold water of, for example, 5 ° C. to 15 ° C. This cold water is circulated to the radiant panel 3 with the feed pipe 4 and the return pipe 5. At this time, the heat obtained from the cold water is effectively conducted to the thin aluminum plate 8. The cooled thin aluminum plate 8 serves as a cooling surface and cools the air on the indoor 2 side via the transparent resin plate 9. The cooled cold air descends in the room 2 and cools the human body. At this time, the heat radiated by the human body is effectively absorbed by the resin transparent plate 9,
The human body is comfortable and cool. Of course, dew condensation on the thin aluminum plate 8 is suppressed by the resin transparent plate 9. Further, a heat insulating material serving as a pipe housing, that is, a base material 6
Since only a small space is formed in the space formed by the thin aluminum plate 8 and the thin aluminum plate 8, there is no problem of dew condensation of the moisture in the air in this part.

Next, the heating operation will be described. During the heating operation, the cold water / hot water generator 1 produces hot water of, for example, 50 ° C to 70 ° C. This hot water is circulated to the radiant panel 3 with the feed pipe 4 and the return pipe 5. At this time, the heat obtained from the hot water is effectively conducted to the thin aluminum plate 8.
The thin aluminum plate 8 that has exchanged heat with the hot water becomes a heating surface and warms the air in the room 2 via the transparent plate 9 made of resin. The thin aluminum plate 8 is efficiently heated by the heat insulating effect of the resin transparent plate 9 and is 5 μm from the resin transparent plate 9.
Emit far infrared rays. This far-infrared ray has the property of heating the human body from the inside, so that the human body is heated from the center of the body.

According to the embodiment of the first invention, the resin transparent plate 9 absorbs the radiant heat from the human body during cooling, thereby further improving the refreshing feeling. Is warmed from the deep, so that it becomes comfortable heating. In addition, since the thin aluminum plate 8 and the resin pipe 7 are covered with the resin transparent plate 9, the occurrence of dew condensation on the radiation panel 3 is suppressed during cooling.
Furthermore, since a synthetic resin pipe is used as a pipe through which cold and hot water passes, a ceiling-mounted radiant cooling and heating device capable of cooling and heating can be provided.

[Embodiment 2] Next, an embodiment of the second invention will be described with reference to FIGS. 6 and 7 and FIGS. The second embodiment of the present invention described below employs the radiating panel 3 shown in FIGS. 2 to 5 described in the first embodiment of the present invention.
The present invention relates to a radiant cooling and heating device in which a secondary cycle having the following is connected to an air conditioner body via a distribution unit. FIG. 6 is a cycle system diagram of the radiant cooling / heating device according to the second embodiment of the present invention, and FIG. 7 is an explanatory diagram showing a state in which the radiant cooling / heating device of FIG.

In FIG. 6, reference numeral 21 denotes an outdoor unit and reference numeral 22 denotes an indoor unit.
2 is an existing air conditioner body. 23 indicated by a dashed line
Is a distribution unit provided between the outdoor unit 21 and the indoor unit 22, and 24 is a radiation panel unit connected to the distribution unit 23. Next, these outdoor unit 21, indoor unit 22, distribution unit 23, radiation panel unit 24
The details of the configuration will be described.

First, in the outdoor unit 21, 25 is a compressor,
26 is a four-way valve, 27 is an outdoor heat exchanger, 28 is an outdoor fan, and 29 is a decompressor. The pressure reducer 29 is used when the indoor unit 22 is directly connected without connecting the distribution unit 23, and is not used in the state shown in FIG. Reference numerals 30a and 30b indicate connecting portions of the pipes.

Next, in the indoor unit 22, 31 is an indoor heat exchanger, and 32 is an indoor fan. Distribution unit 2
In FIG. 3, reference numeral 33 indicated by a broken line denotes a medium heat exchange unit,
Reference numeral 4 denotes a first decompressor for decompressing the refrigerant flowing to the indoor unit 22 side, and reference numeral 35 denotes a second decompressor for depressurizing the refrigerant flowing to the medium heat exchange unit 33 side. Here, these pressure reducers 34,
Generally, 35 is an electric expansion valve which automatically detects the cycle temperature in the distribution unit 23 and automatically operates.

The radiant panel 3 in the radiant panel unit 24 employs the same one as the radiant panel 3 shown in FIG. Reference numeral 37 denotes a secondary cycle piping system (hereinafter, simply referred to as a secondary cycle system). A heat exchange section (heat transfer tube) 38 of the secondary cycle system 37 constitutes a medium heat exchange section 33 in the distribution unit 23 and emits radiation. The cooling and heating functions are exhibited by the panel 3. Reference numeral 39 denotes a pump for circulating cold water or hot water as a medium in the secondary cycle system 37.

When the air conditioner with the secondary cycle system 37 having such a configuration is operated for cooling, the air conditioner body and the secondary cycle system 37 operate as follows. The high-temperature, high-pressure refrigerant gas compressed by the compressor 25 reaches the outdoor heat exchanger 27 via the four-way valve 26. Here, with the help of the outdoor fan 28, heat is released to the outside air, and the condensed refrigerant is depressurized by the decompressor 29. The depressurized low-temperature liquid refrigerant is supplied to the distribution unit 2
3 and the indoor heat exchanger 31 via the pipe A via the decompressor 34 in the distribution unit 23 through the pipe E connected to 3. Here, the liquid refrigerant exchanges heat with the indoor air with the help of the indoor fan 32, and the refrigerant evaporates. The room is cooled by the latent heat of evaporation at this time.

The gaseous refrigerant evaporated in the indoor heat exchanger 31 passes through the pipe B connected to the distribution unit 23, further passes through the pipes G and F, returns to the compressor 25 through the four-way valve 26, and is compressed again. Hereinafter, the same cycle is repeated. In this process, the pipe H branched on the compressor side of the pressure reducer 34
Is provided with a second decompressor 35 in the middle. The low-temperature refrigerant decompressed by the decompressor 35 is supplied to the medium heat exchange section 33.
Has been reached. That is, a part of the refrigerant that should reach the indoor heat exchanger 31 reaches the medium heat exchange unit 33 via the pipe H and the pressure reducer 35. Here, when the heat exchange part 38 of the secondary cycle system 37 is cooled, the cold water in the secondary cycle system 37 is cooled to about 5 to 15 ° C.

The cooled cold water is circulated into the radiating panel 3 by the pipes C and D by the operation of the pump 39, and is radiated through the radiating panel 3 to the room (to be described later in the room 40 in FIG. 7).
(See Reference). When the radiation panel unit 24 is not used, the pressure reducer 35 is fully closed, and
If the operation of the next cycle system 37 (the operation of the pump 39) is stopped, a refrigeration cycle of only the air conditioner body is performed.

Next, when the air conditioner with the secondary cycle system 37 is operated for heating, the air conditioner body and the secondary cycle system 37 operate as follows. The high-temperature, high-pressure refrigerant gas compressed by the compressor 25 passes through a pipe F connected to the distribution unit 23 via a four-way valve 26, and then passes through the distribution unit 23.
Through the inside pipe G and the inside of the pipe B, the indoor heat exchanger 31 of the indoor unit 22 is exchanged with indoor air. At this time, the indoor fan 32 promotes the heat exchange. The liquid refrigerant condensed by releasing the heat passes through the pipe A, passes through the pressure reducer 34, passes through the pipe E, and reaches the outdoor heat exchanger 27 of the outdoor unit 21. Here, the refrigerant exchanges heat with room air to evaporate to become a low-temperature low-pressure gas refrigerant, returns to the compressor 25 via the four-way valve 26, is compressed again, and thereafter repeats the same cycle.

In this process, the high-temperature and high-pressure refrigerant having passed through the pipe F goes to the pipe G, but also branches and flows to the medium heat exchange section 33. Thereby, the cold water in the secondary cycle system 37 is heated to 50-70 ° C. hot water via the heat exchange section 38. The heated hot water is circulated through the pipes C and D into the radiation panel 3 by the operation of the pump 39, and the radiation panel 3
This also heats the room (see the room 40 in FIG. 7 described later).

Next, the mounting state of the radiating panel unit 24 and the indoor unit 22 in the room will be described with reference to FIG. In FIG. 7, reference numeral 40 denotes a room. Reference numeral 3 denotes a radiant panel constituting the radiant panel unit 24. The radiant panel 3 is attached to almost the entire ceiling surface in the room.
The mounting structure is as described in the embodiment shown in FIG. 21 is an outdoor unit, 23 is a distribution unit,
Reference numeral 22 denotes an indoor unit. The indoor unit 22 is attached to the upper part of the wall surface 40a of the room 40 as in the conventional case.

When the radiation cooling / heating device having such a configuration is operated, the room 40 (FIG. 7) is cooled and heated as follows. First, at the time of cooling, 2
The heat exchange section 38 of the next cycle system 37 produces cold water at 5 to 15 ° C. This cold water is circulated to the radiation panel 3 via the pipes C and D by the pump 39 of the secondary cycle system 37. At this time, the heat obtained from the cold water is effectively conducted to the thin aluminum plate 8 shown in FIG.

The cooled thin aluminum plate 8 serves as a cooling surface, and cools the air on the room 40 side via the transparent plate 9 made of resin. Cold air descends in the room 40 to cool the human body. At this time, the heat radiated by the human body is effectively absorbed by the ceramic-processed thin aluminum plate 8, so that the human body can enjoy a comfortable cooling sensation. Further, since the space formed by the base material (heat insulator) 6 serving as the pipe housing and the thin aluminum plate 8 is small, dew condensation in the air at this portion does not pose a problem.

Next, heating will be described. At the time of heating, the heat exchange part 38 of the secondary cycle system 37 in the medium heat exchange part 33 produces hot water of 50 to 70 ° C. This hot water is circulated to the radiation panel 3 via the pipes C and D by the pump 39 of the secondary cycle system 37. At this time, the heat obtained from the hot water is effectively conducted to the thin aluminum plate 8 shown in FIG. The thin aluminum plate 8 which has exchanged heat with the hot water becomes a heating surface, and warms the air on the room 40 side via the transparent plate 9 made of resin.

The thin aluminum plate 8 is heated and emits far infrared rays of 5 μm or more. The far infrared rays have the property of heating the human body from the inside, so that the human body is warmed from the center of the body. The cooling and heating device of the present invention can be arbitrarily changed by the user's selection, such as normally using the air conditioner body at the start of the cooling and heating operations, and switching to the operation of the radiation panel at the time of stability.

According to the second embodiment of the present invention, since the medium of the secondary cycle system 37 is a medium that can be used at a relatively low pressure, such as cold water or hot water, it is possible to use a synthetic resin pipe. Therefore, the workability for a building or the like is further improved as compared with a metal pipe. The radiant panel unit 24 mainly cools and heats the human body, and the entire room is cooled and heated by the air conditioner main body, so that the user can always have a pleasant feeling. Since the air conditioner has a dehumidifying function, dew does not occur on the radiation panel 3 even when there is no dedicated dehumidifier during cooling by the radiation panel 3.

Further, the operation state can be selectively varied by interposing the distribution unit 23.
For example, it is possible to selectively and easily switch between a normal cooling / heating operation using an air conditioner and a cooling / heating operation using a radiant panel, or an operation combining them. In addition, if the distribution unit 23 is not used, it can be used as a normal air conditioner. In short, an air conditioner with a radiation panel can be obtained only by interposing the distribution unit 23 in a normal air conditioner.

[0058]

As has been detailed description, according to the present invention, according to a first aspect of the present invention, in a compact configuration, with no need of dehumidifier to prevent condensation on the radiation panel surface, rejecting heat
Ru can provide greater cooling and heating capable of emitting air conditioner quantities. Further, according to the second invention, a secondary cycle system having a radiation panel is connected to the air conditioner main body via the distribution unit, and the air conditioner main body and the secondary cycle system are used in combination to provide a comfortable cooling and heating operation. In addition, it is possible to provide a radiant cooling and heating device that does not require a dehumidifier. Further, according to the present invention, it is possible to provide a radiation cooling / heating device having good workability for a building or the like.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a radiant cooling / heating device showing an embodiment of a first invention.

FIG. 2 is a detailed partial cross-sectional view of the radiant panel of FIG.

FIG. 3 is a plan view illustrating the arrangement of pipes on a substrate.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a cross-sectional view showing a state where the radiant panel of FIG. 2 is attached to a ceiling.

FIG. 6 is a cycle system diagram of a radiation cooling / heating apparatus showing an embodiment of the second invention.

FIG. 7 is an explanatory diagram showing a state in which the radiation cooling / heating apparatus of FIG. 6 is installed in a room.

FIG. 8 is a view showing experimental results of an example.

FIG. 9 is a diagram showing experimental results of the example.

[Explanation of symbols]

1: cold water / hot water generator, 2: indoor, 3: radiation panel, 4
... feed pipe, 5 ... return pipe, 6 ... substrate, 7 ... resin pipe, 8 ... thin aluminum plate, 8a ... ceramic treated surface, 9 ... resin transparent plate, 10 ... groove for pipe installation, 11
... ceiling, 12 ... mounting seat, 13 ... screw, 14 ... radiation panel fixing screw, 21 ... outdoor unit, 22 ... indoor unit, 23 ... distribution unit, 24 ... radiation panel unit, 25 ... compressor,
27 ... outdoor heat exchanger, 29, 34, 35 ... decompressor, 31
... indoor heat exchanger, 33 ... medium heat exchange section, 37 ... secondary cycle system, 38 ... heat exchange section, 39 ... pump, 40 ... indoor.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor: Kenji Usui 800, Tomita, Odai-cho, Ohira-machi, Shimotsuga-gun, Tochigi Prefecture Inside the Cooling Division, Hitachi, Ltd. (72) Inventor: Kenichi Sakurai 7-2-1, Nakayama, Aoba-ku, Sendai, Miyagi Prefecture No. Tohoku Electric Power Co., Inc. Research and Development Center (56) References JP-A-6-42779 (JP, A) JP-A-6-147558 (JP, A) Japanese Utility Model 60-83457 (JP, U) Japanese Utility Model 54-42065 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 5/00

Claims (1)

(57) [Claims] 1. A radiant cooling and heating apparatus provided with a radiant panel using cold water or hot water as a medium,
Includes a substrate, a pipe for circulating the cold water or hot water or the like is embedded in a groove provided in the substrate, release infrared counter-pipe side is attached to the substrate so as to be in close contact with the pipe I促 a thin aluminum plate which has been subjected to the advance process, pre Symbol thin
Contacting the infrared release I促 advances the processing surface of the meat aluminum plate Shiteko
Radiation cooling and heating device comprising a kite and a low thermal conductivity shielding plate made of an infrared-absorbing material provided to cover the record.