JP3936962B1 - Radiant air conditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation air conditioning unit and a condensation prevention method capable of preventing condensation of a radiation panel while suppressing a problem of sound.
SOLUTION: The radiation panel 14 of the radiation air conditioning unit 10 is provided with an internal guide path 23 that guides air-conditioning air that cools the radiation panel 14 to a blow-out port 22, and the air-conditioning air is rectified by the internal guide path 23. The internal guide path 23 is formed by an airflow guide plate 24, and a vortex flow in a predetermined swirl direction is generated by the airflow guide plate 24, and is interposed between the flow of conditioned air discharged from the blowout port 22 and the radiation panel 14. The eddy current suppresses separation of the conditioned air flowing along the indoor-side surface 14b of the radiation panel 14 from the radiation panel 14.
[Selection] Figure 3

Description

The present invention relates to a radiation air-conditioning unit for conditioning the indoor (air-conditioning), in particular, it relates to a radiant air-conditioning unit capable of preventing dew condensation at the cooling.

  For example, a forced convection type air conditioner (air conditioner), a fan heater, or the like is used as a cooling / heating device for cooling / heating a room. The air conditioner, fan heater, and the like adjust the indoor temperature by blowing cold air or warm air from the blow-out part into the indoor space, and perform indoor air conditioning.

  However, in recent years, houses are excellent in airtightness, so cold air or hot air blown from blowout parts such as air conditioners and fan heaters scatters house dust accumulated in the room while convection in the room. It was a cause of allergies and asthma.

  Therefore, a natural convection type radiation cooling and heating apparatus is conventionally used which includes a radiation panel installed on a ceiling surface or the like facing the room and a pipe provided in contact with the radiation panel. This radiant cooling and heating system cools or heats a radiant panel by passing a cooled or heated medium through a pipe in contact with the inner surface of the radiant panel, and only a slight movement of air due to the radiant heat of the radiant panel and some natural convection. It is used for air conditioning. In natural convection, air only moves slowly, so that it is possible to prevent house dust and the like from being scattered in the room.

However, when the temperature of the radiant panel becomes lower than the dew point temperature of the indoor air during cooling, a large amount of dew condensation does not occur on the indoor side surface of the radiant panel. There was a problem that water drops fell indoors and soiled the floor surface. In particular, in a large temperature difference air-conditioning type radiation cooling and heating apparatus, condensation has been a major problem. Therefore, in order to solve such a problem, the following Patent Document 1 and Patent Document 2 are disclosed.
JP-A-5-332580 JP-A-8-247487

  In Patent Document 1, a plurality of radiant panels installed on the ceiling surface at predetermined intervals, a plurality of cold / hot water pipes arranged so as to be in contact with the radiant panels, and provided at both ends of the radiant panel, A radiant cooling and heating apparatus is disclosed that includes a duct having air-conditioning air outlets on both sides in the width direction. This radiant cooling and heating apparatus heats or cools the radiant panel by flowing hot water or cold water into cold / hot water pipes that are in contact with the inner surface of the radiant panel, thereby performing indoor air conditioning. And this radiation cooling and heating apparatus generates dew condensation on the indoor side surface of the radiation panel by blowing out the temperature-conditioned and humidity-conditioned air from the outlets on both sides in the width direction of the duct along the indoor side surface of the radiation panel. To prevent that. In Patent Document 1, a plurality of rectifying plates are installed at the outlets on both sides in the width direction of the duct with a space between them, and the air-conditioning air is parallel to the indoor side surface of the radiation panel from the gaps between these rectifying plates. It is proposed to make it discharge.

  Further, in Patent Document 2, the heat accommodated in a heat insulating case installed on the ceiling surface in a radiant cooling / heating device having a radiator with a built-in refrigerant pipe connected to an outdoor heat exchanger of an outdoor unit. A radiant cooling device to which an exchanger and a blower fan are added is disclosed. This radiant cooling device cools a radiator (radiant panel) by a refrigerant such as an alternative chlorofluorocarbon sent from an outdoor unit through a cooling pipe, thereby cooling the room. Further, in this radiant cooling device, the air is cooled and dehumidified by the heat exchanger in the heat insulating case on the ceiling surface, and the heat exchanger and the indoor surface of the radiator (radiant panel) are connected by the blower fan. It creates a circulating air flow. As a result, the cooled and dehumidified air always flows on the indoor side surface of the radiator (radiant panel), and dew condensation generated on the indoor side surface is reduced.

  However, when a plurality of relatively narrow rectifying plates having a relatively small size in the flow direction of air-conditioning air are provided at the outlet as in Patent Document 1, and air-conditioning air is discharged from a gap between these rectifying plates, As the amount of air-conditioning air to be increased increases, sound is more likely to be generated. That is, to cover the entire area of the indoor surface of the radiant panel with the flow of conditioned air along the indoor surface of the radiant panel, it is necessary to increase the discharge amount of the conditioned air as the radiant panel becomes larger. As the number increases, a large amount of air-conditioning air flows out from the gap between the rectifying plates, which tends to be a source of sound, and a power source with a large capacity as a fan power source for discharging a large amount of air-conditioning air It is necessary to prepare.

  In the case of creating a circulating flow of air-conditioned air for each radiation panel as in Patent Document 2, it is necessary to provide a blower fan for each radiation panel, which is costly. In addition, since the number of facilities increases, the structure inside the ceiling becomes complicated, which requires time and labor for maintenance, and a large-scale facility location is required.

An object of the present invention is to provide a radiation air-conditioning unit capable of preventing the condensation of the radiation panel while suppressing the generation of air-conditioning air blowing sound from outlet.

A further object of the present invention is to provide a radiation air-conditioning units that the structure of the radiant air-conditioning system capable of preventing dew condensation while simplifying.

Above-mentioned problems, according to the onset Akira,
A casing that receives supply of air-conditioned air for radiant cooling and heating that is air-conditioned and a radiant panel that has an indoor-side surface facing the room, and cools the radiant panel by the conditioned air supplied to the casing A radiant air conditioning unit that cools the room by
A blowout port having directivity for generating a flow of conditioned air along the indoor side surface of the radiant panel from the vicinity of the end of the radiant panel toward the center,
An airflow guide plate that forms an internal guiding path for guiding the air-conditioned air to the outlet,
The airflow guide plate has an upright portion extending upward from an end edge portion of the radiation panel, and an inclined portion that curves from the lower end of the upright portion and continues to the radiation panel and forms the upper wall surface of the outlet. This is achieved by providing a radiant air conditioning unit characterized in that.

According to the radiation air-conditioning unit according to the present invention, it is possible to prevent dew condensation by forming a film of air-conditioning air to the interior side surface of the radiation panel by conditioned air flowing along the interior surface of the radiant panel. According to the radiant air conditioning unit according to the present invention, the swirl direction of the vortex that can be made into the conditioned air entering the internal guide path is determined by the airflow guide plate that forms the internal guide path that guides the conditioned air to the outlet. The flow direction of the air flow is adjusted by the air flow guide plate while defining the flow direction to collide with the air flow guide plate. The air-conditioning air discharged in the direction along the indoor side surface of the radiant panel from the air outlet becomes a relatively large swirl flow in the process of introducing the air-conditioned air to the air outlet, and this relatively large flow. Due to the swirling flow, the air-conditioned air discharged from the outlet is drawn toward the indoor side surface of the radiation panel. From this, it is possible to suppress the flow of air-conditioned air along the radiant panel from being separated from the radiant panel, so that even if the amount of air-conditioned air discharged from the outlet is relatively small, Condensation can be prevented by accurately forming a film of conditioned air.

  Therefore, it is possible to reduce the degree of dependency of the air volume of air conditioning air required for forming a film of air conditioning air on the indoor surface of the radiant panel. It is sufficient to prepare a power source having a relatively small capacity as a power source of the fan for discharging from the outlet, and energy for driving the fan can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is an overall perspective view of a radiation air conditioning unit 10 according to the present embodiment, FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1, and FIG. 3 is a partial enlarged view taken along line BB in FIG. . The radiant air conditioning unit 10 according to the present embodiment is used by being installed on the ceiling surface 112 as described later.

  As shown in FIGS. 1 to 3, the radiant air conditioning unit 10 according to the present embodiment is roughly composed of a unit body 12 and a radiant panel 14. As will be described later, the radiant air-conditioning unit 10 cools or heats the radiant panel 14 by applying air-conditioned air that has flowed into the unit body 12 to the radiant panel 14, and cools or heats the room using the radiant heat.

  Air conditioning (air conditioning) means adjusting the temperature, humidity, cleanliness, etc. of indoor air to a predetermined state by an air conditioner or the like. Air conditioning air conditioned by the air conditioner flows into the radiant air conditioning unit through the air supply duct and cools or heats the radiant panel, thereby performing indoor air conditioning.

  The unit main body 12 includes a housing 16 and an airflow adjustment plate 18 provided inside the housing 16. As will be described later, the unit main body 12 is disposed inside the ceiling so that the indoor side surface 14b of the radiation panel 14 assembled to the unit main body 12 faces the room of the ceiling surface 112.

  The casing 16 includes a first chamber portion (plenum chamber portion) 16a to which an air supply duct 108, which will be described later, is connected, and a second chamber portion 16b having a width wider than the first chamber portion 16a, and is integrally formed with a steel plate or the like. Has been. The radiation panel 14 is installed on the indoor side of the second chamber portion 16b. In this Embodiment, the steel plate used for the housing | casing 16 is suitably selected by the place and use condition where the air conditioning unit 10 is installed, for example, a zinc iron plate, a stainless steel plate, etc. are used. The casing 16 is provided with a heat insulating material (not shown) around it as necessary.

  The upper surface 16c of the first chamber portion 16a of the housing 16 is formed with a connection hole 16d for connecting an air supply duct 108, which will be described later, into which air-conditioned air flows. A rectangular opening 16f for exposing the radiation panel 14 to the room is formed by the lower surface flange 16e of the second chamber 16b of the housing 16.

  The lower surface flange 16e of the housing 16 defines the lower wall surface of the air outlet 22 extending along both side edges of the radiant panel 14, and the rectified conditioned air passes from the air outlet 22 to the indoor side surface 14b of the radiant panel 14. It is discharged in a state directed in the direction along. The air outlet 22 and the internal guiding path 23 for guiding the air-conditioned air to the air outlet 22 will be described with reference to FIG.

  Airflow guide plates 24 are respectively provided on opposite side edges of the radiation panel 14. In this embodiment, the airflow guide plate 24 is composed of a part different from the radiation panel 14, but may be formed by molding both side edges of the radiation panel 14.

  Referring to FIG. 3, the airflow guide plate 24 has a shape of letter J of the alphabet. That is, the airflow guide plate 24 has an upright portion 24a that is slightly inclined upward from each side edge of the radiant panel 14 and toward the center of the radiant panel 14, and the lower end of the upright portion 24a is the indoor side surface 14b of the radiant panel 14. It is located slightly lower than the upright portion 24a and is curved with a relatively small radius of curvature from the lower end of the standing portion 24a toward the radiating panel 14, and continues to the inclined portion 24b extending toward the indoor surface 14b of the radiating panel 14, and this inclined portion 24b has a curved shape that slightly bulges downward. The inclined portion 24 b constitutes the upper wall surface of the outlet 22. That is, the blower outlet 22 has an upper wall surface constituted by a curved inclined portion 24b slightly bulged downward, and a lower wall surface constituted by the above-described lower surface flange 16e of the housing 16.

  Referring to FIG. 3, the corner portion indicated by reference numeral 25 in FIG. 3 of the internal guide path 23 has a smoothly curved shape, but it may have an L-shaped square shape. That is, the side wall surface 16i and the lower surface flange 16e of the second chamber portion 16b may intersect at a substantially right angle.

  The J-shaped airflow guide plate 24 forms an internal guide path 23 that adjusts the flow direction of the air-conditioning air while guiding the air-conditioning air introduced into the second chamber 16b to the outlet 22 in order to heat and cool the radiation panel 14. However, the upright portion 24a of the airflow guide plate 24 causes a vortex in a region adjacent to the upright portion 24a. The swirl direction of the vortex is the collision direction with the airflow guide plate 24 with respect to the flow direction of the air-conditioning air passing through the internal guide path 23. That is, FIG. 3 shows the right outlet 22, but in terms of this outlet 22, the swirl direction of the vortex is clockwise. The J-shaped airflow guide plate 24 is curved with a relatively small radius of curvature from the lower end of the standing portion 24a and then continues to the inclined portion 24b. The inclined portion 24b has a curved shape that slightly bulges downward. Therefore, the vortex flow described above becomes a relatively large swirling flow in the process of flowing along the J-shaped airflow guide plate 24, and is discharged from the blow-out port 22 by this swirling flow as shown by a broken line in FIG. The conditioned air is drawn toward the indoor surface 14 b side of the radiation panel 14.

  Therefore, the conditioned air is discharged from the outlet 22 in the direction along the indoor surface 14b of the radiant panel 14 and flows along the radiant panel 14 to form a film of conditioned air on the indoor surface 14b of the radiant panel 14. However, the relatively large swirling flow generated in the internal guide path 23 that guides the air-conditioning air to the air outlet 22 draws the air-conditioning air discharged from the air outlet 22 toward the indoor side surface 14b of the radiation panel 14. Condensation can be prevented by forming a film of air-conditioning air on the indoor surface 14b of the radiation panel 14 while suppressing the flow of the air-conditioning air discharged from the outlet 22 from the radiation panel 14. Thereby, the ratio depending on the air volume of the air-conditioning air discharged from the blow-out port 22 in order to form the film of the air-conditioning air on the indoor-side surface 14b of the radiation panel 14 can be reduced.

  The blowing port 22 is preferably configured such that the distance D between the upper wall surface (inclined portion 24b) and the lower wall surface (lower surface flange 16e) is gradually increased toward the tip of the blowing port 22, that is, the discharge side end. Good. Thereby, it can suppress that an airflow expand | swells at the discharge side end of the blower outlet 22, and an airflow spread | diffuses.

  Further, the housing-side inner surface 16h of the lower surface flange 16e constituting the lower wall surface of the air outlet 22 is inclined so as to approach the upper end, that is, the indoor side surface 14b of the radiation panel 14 toward the tip of the air outlet 22. Is preferred. That is, the center line of the air outlet 22 is inclined toward the indoor surface 14b side of the radiation panel 14, and the discharge direction of the air-conditioning air discharged from the air outlet 22, that is, the directing direction of the air outlet 22 is the indoor surface 14b side of the radiation panel 14. It is sent to. In the present embodiment, the inclination angle of the housing-side inner surface 16h is about 5 degrees. Thus, since the discharge direction of the conditioned air discharged from the blowout port 22 is directed in the direction approaching the radiant panel 14, the conditioned air flowing along the indoor surface 14 b of the radiant panel 14 is directed. The flow can be stuck to the radiant panel 14, thereby suppressing the flow of conditioned air along the radiant panel 14 from being separated from the radiant panel 14.

  In addition, between the first chamber portion 16a and the second chamber portion 16b in the housing 16, the conditioned air that has flowed into the first chamber portion 16a flows into the second chamber portion 16b in an even state. An airflow adjusting plate 18 is provided for this purpose. The air flow adjusting plate (punching grille) 18 is integrally formed in a plate shape with a steel plate or the like, and a plurality of air holes 18a through which air-conditioned air can pass are provided in a lattice shape on a flat surface portion thereof. As the shape of each air hole 18a, for example, a round hole or a square hole is used.

  The radiant panel 14 may have a flat shape over the entire region, or may have a curved shape so that the lower side, that is, the inside of the room is convex. A rectangular steel plate slightly larger than the opening 16f formed in the lower surface flange 16e is bent by a degree around a center line parallel to the long side, and the cross-sectional shape perpendicular to the long side is a mountain shape with a convex downward in the figure ( It is integrally formed so as to have a shape in which two inclined surfaces are combined (see FIG. 2). Therefore, the ridgeline of the radiant panel faces the room, and the internal angle of the radiant panel 14 is about degrees to degrees.

  The radiation panel 14 is fixed in the casing 16 by rod-shaped connecting members 20 whose both ends are fixed to the inner upper surface 16g of the second chamber portion 16b and the casing-side inner surface 14c of the radiation panel 14. . At this time, the radiation panel 14 is fixed with a gap so that the indoor-side surface 14 b thereof does not contact the housing-side inner surface 16 h of the second chamber 16 b of the housing 16. This gap becomes the air-conditioning air outlet 22 described above. In this embodiment, the average value of the distance D between the upper wall surface (inclined portion 24b) and the lower wall surface (lower surface flange 16e) of the air outlet 22 is about 10 mm to about 15 mm.

  As described above, the air-conditioning air that has flowed into the radiant air conditioning unit 10 from the air conditioner 104 and collided with the housing-side inner surface 14c of the radiant panel 14 is the housing-side inner surface 14c of the radiant panel 14 and the inner upper surface of the second chamber 16b. The air travels through the space sandwiched between 16 g toward the edge of the radiant panel 14, the flow direction is adjusted by the airflow guide plate 24, and the air is discharged from the outlet 22 in the direction along the indoor surface 14 b of the radiant panel 14. Is done. As described above, the conditioned air hitting the casing-side inner surface of the radiant panel 14 moves to both sides of the second chamber 16 through the flow path formed by the second chamber 16b and the radiant panel 14 of the casing 16. And, it is discharged from the outlet 22.

  The airflow guide plate 24 is formed by bending an elongated rectangular flat steel plate into the shape of the letter “J” of the alphabet as described above, and the front end portion of this airflow guide plate 24 (the end of the letter “J”). Is fixed to the radiant panel 14 so as to cover both ends of the long side of the radiant panel 14 by the airflow guide plate 24 by being welded to about 10 mm inside from both ends of the indoor side surface 14b of the radiant panel 14. ing. In a region adjacent to the airflow guide plate 24, a vortex flow in a prescribed swirl direction is generated, and this vortex flow becomes a relatively large swirl flow in the process of flowing along the shape of the J-shaped airflow guide plate 24. The flow of empty air discharged from the blowout port 22 can be stuck to the indoor side surface 14b of the radiation panel 14.

  Next, the configuration of the air conditioning system 100 using the radiation air conditioning unit 10 configured as described above will be described in detail with reference to FIG. 4 in addition to FIGS. 1 to 3. FIG. 4 is a schematic configuration diagram of an air conditioning system 100 using the radiant air conditioning unit 10 according to the present embodiment. In addition, in FIG. 4, the air conditioning system 100 installed for every floors, such as a building, is shown, and it has illustrated in the simplified two-dimensional figure. As shown in the figure, in the present system 100, a set of total heat exchangers 102 and air conditioners 104 provided on each floor are shared by a plurality of radiant air conditioning units 10, and air conditioning of the entire floor is collectively performed on each floor. And manage.

  The total heat exchanger 102 is installed outside and performs ventilation for taking in outside air while discharging indoor air to the outside of the building. At this time, it has a function of performing ventilation so that heat energy in the air discharged from the room is not released. The air conditioner 104 disposed on the downstream side of the total heat exchanger 102 has a function of adjusting the air sent from the total heat exchanger 102 to a predetermined temperature and humidity.

  As shown in FIG. 1 to FIG. 4, the air conditioning system 100 includes the radiant air conditioning unit 10 described above, a total heat exchanger 102 for efficiently replacing indoor air, and air sent from the total heat exchanger 102. It is composed of an air conditioner 104 for air conditioning (adjusting temperature, humidity, and cleanness to a predetermined state), an exhaust fan 116 that exhausts air heat-exchanged in the total heat exchanger 102, and piping that connects them. The The air conditioning system 100 is configured to send, to the radiant air conditioning unit 10, the conveyance duct 106 for sending the air heat-exchanged in the total heat exchanger 102 to the air conditioner 104 and the conditioned air conditioned by the air conditioner 104 as piping. Air supply duct 108 and a return air duct 110 for sending indoor air to the total heat exchanger 102.

  The air conditioning system 100 according to the present embodiment performs air conditioning using a large temperature difference air conditioning system. The large temperature difference air conditioning system is a system that reduces the air conditioning conveyance capacity of air conditioners, etc. by taking a large temperature difference between the supply air and return air of the heat medium and reducing the air flow rate in the duct. is there. For example, at the time of cooling, in the case of conventional air conditioning, the blowing temperature from the air conditioner is about 12 ° C. to 20 ° C., whereas in the large temperature difference air conditioning method, it is about 15 ° C. or less, preferably about 5 to 12 ° C. C., more preferably about 5-10.degree. C., which can be set to a temperature lower than usual. For this reason, the amount of air blown from the air conditioner can be halved by doubling the transport amount per unit of energy, so that the power of the blower can also be halved.

  In each floor, a plurality of radiant air conditioning units 10 (five in this embodiment) are installed on the ceiling surface 112 in the room at a predetermined interval. Each radiant air conditioning unit 10 is connected to an air supply duct 108 that communicates with the air conditioner 104. Thereby, the air-conditioning air conditioned by the air conditioner 104 is supplied to each radiation air-conditioning unit 10.

  Further, the ceiling surface 112 is provided with a ventilation port 114 for ventilating indoor air. A return air duct 110 connected to the total heat exchanger 102 is connected to the ventilation port 114, and indoor air is sent from the ventilation port 114 to the total heat exchanger 102. The indoor air sucked into the total heat exchanger 102 is subjected to heat exchange in the total heat exchanger 102, and the unnecessary air is discharged from the exhaust fan 116 to the outside. Thereby, the indoor air can be ventilated to fresh outside air without escaping thermal energy, and the cleanliness of the room can be kept constant.

  As described above, the configuration of the radiation air conditioning unit 10 and the air conditioning system 100 according to the present embodiment has been described in detail. Next, the operation when the radiation air conditioning unit 10 and the air conditioning system 100 configured as described above are operated is illustrated in FIG. Details will be described with reference to FIG. Here, for example, the operation when the room is radiantly cooled to a predetermined temperature by air-conditioning air cooled to about 10 ° C. will be described. Of course, it can also be used as heating by heating the radiation panel 14.

  As described above, the total heat exchanger 102 takes in outside air and takes in air ventilated from the room to perform total heat exchange. The heat-exchanged air is sent from the total heat exchanger 102 to the air conditioner 104 via the transport duct 106. Next, the air conditioner 104 adjusts the air sent from the total heat exchanger 102 to a predetermined temperature, humidity, and cleanliness. The air conditioner 104 supplies the conditioned air-conditioned air to each radiant air-conditioning unit 10 via the air supply duct 108.

  Air-conditioned air supplied into the radiant air-conditioning unit 10 flows into the first chamber portion 16a of the casing 16 and hits an airflow adjusting plate 18 provided in the casing 16, as indicated by arrows in FIG. At this time, the air-conditioning air hitting the airflow adjusting plate 18 passes through a plurality of vent holes 18 a provided in the plane of the airflow adjusting plate 18, so that the airflow is adjusted to a uniform air flow over the entire surface of the airflow adjusting plate 18. It flows into the second chamber part 16b.

  The air-conditioned air that has flowed into the second chamber portion 16b hits a portion of the housing-side inner surface 14c of the radiation panel 14 provided in the second chamber portion 16b that is located directly below the first chamber portion 16a. The temperature of the conditioned air is adjusted to 10 ° C., and the radiation panel 14 is cooled to about 10 ° C. by the conditioned air. When the radiation panel 14 is cooled, the room is cooled to a predetermined temperature by the radiation.

  As described above, since the air-conditioning air discharged from the outlet 22 along the indoor side surface 14b of the radiation panel 14 is attracted to the indoor side surface 14b of the radiation panel 14, the air-conditioning air flowing along the radiation panel 14 is Separation from the radiant panel 14 can be suppressed, whereby a film of conditioned air generated on the indoor surface 14b of the radiant panel 14 can be accurately generated, and condensation of the radiant panel 14 can be prevented. Can do. Moreover, since it becomes the form which sandwiches the upper and lower surfaces of the radiation panel 14 with air-conditioning air, the heat-transfer efficiency with respect to the radiation panel 14 can be improved.

  Air conditioning air cannot condense. Therefore, as a countermeasure against condensation on the indoor side surface 14b of the radiation panel 14 cooled by the air-conditioning air, it is not necessary to control the temperature and humidity of the condensation prevention air as seen conventionally, and therefore a system configuration related to the countermeasure against condensation. Can be simplified.

  And the air-conditioning air which flows toward the center part of the indoor side surface 14b of the radiation panel 14 collides near the center part and flows downward in the vertical direction toward the indoor side. Also do. At this time, the amount of the air-conditioning air flowing toward the room is very small in the present embodiment of the large-temperature-difference type radiation air-conditioning system as compared with a normal forced convection type air-conditioner or the like. It is about 1 / minute.

  The air-conditioning air blown into the room in this way is sent from the ventilation port 114 shown in FIG. 4 to the total heat exchanger 102 through the return air duct 110 and exchanges heat with the outside air taken in. . Thereby, the room can maintain a constant cleanliness and always maintain an air-conditioned state.

  In this way, if it is a radiation type cooling by the large temperature difference method, a strong air flow does not occur in the room unlike the forced convection type air conditioning system, so that the house dust is scattered in the room. In this way, the room can be efficiently cooled. In particular, practical use of a large-temperature-difference type cooling system is possible because condensation of the radiation panel 14 can be prevented even if the radiation panel 14 is cooled to a low temperature of 10 ° C. or less, for example, around 5 ° C., which has not been considered in the past. Can do.

  In this embodiment, the large-temperature-difference radiation air conditioning system is used, but even if a normal radiation-air conditioning system that is not a large-temperature difference method is adopted, the amount of air blown out from the outlet and sent into the room is Significantly less than forced convection air conditioning systems. That is, in the present embodiment, which is basically a radiant air conditioning system, there is a radiation effect of the cooled radiant panel. Therefore, compared with the forced convection method in which the room is cooled only by the conditioned air, the air flowing into the room significantly. The amount of can be reduced.

  In the present embodiment described above, as shown in FIG. 4, the total heat exchanger 102 and the air conditioner 104 are installed for each floor. However, the installation mode of the total heat exchanger and the air conditioner can be appropriately changed. is there.

  For example, as shown in FIG. 5, instead of the air conditioner 104 used in the above embodiment, an air conditioning system including a fan coil unit 202 that has a fan for blowing air and heats or cools air circulated by the fan. 200 may be used. In addition, it is the same as that of the said embodiment except changing to the air conditioner 104 and using the fan coil unit 202. FIG.

  The air conditioning system 200 first takes in the outside air by the total heat exchanger 102 and takes in the air ventilated from the room to perform total heat exchange. Then, the total heat exchanger 102 sends the air subjected to the total heat exchange to the fan coil unit 202 via the transport duct 206.

  Next, the fan coil unit 202 air-conditions the air sent from the total heat exchanger 102, and sends the air-conditioned air that has been conditioned to the radiant air-conditioning unit 10 via the air supply duct 204. According to this air-conditioning system 200, the temperature management of several radiant air-conditioning units 10 (two in this embodiment) can be performed with one fan coil unit 200, so that independent air conditioning or the like can be performed for each room. It becomes.

  As shown in FIG. 6, an air conditioner 210 including an air conditioner and a heat exchanger may be attached to the casing 16 of the radiant air conditioning unit 10 instead of the fan coil unit 202 used in the above modification. . According to the radiation air-conditioning unit 10 using this air-conditioning apparatus 210, since installations, such as a duct, become unnecessary, construction is easy and construction cost etc. can be reduced significantly.

  According to the above-described embodiment, the air-conditioning air for cooling the radiation panel 14 for radiant cooling and heating is used to prevent condensation that occurs on the radiation panel 14, so that the conventional radiation air-conditioning system is Therefore, it is not necessary to separately provide a dew condensation prevention facility, which is economical and can simplify the structure inside the ceiling.

  Further, in this embodiment, an air conditioning system using a large temperature difference method is adopted, and the amount of energy transferred per unit can be doubled and the amount of air blown from the air conditioner can be halved, so that energy efficient air conditioning can be realized. . Further, since the amount of air blown is small, the amount of air-conditioning air flowing into the room is small, and problems such as scattering of house dust in the room can be prevented.

  Moreover, in this embodiment, although it is a radiation air conditioning system, radiation air conditioning air is allowed to flow into the room, and in addition to cooling and heating by the radiation effect, it is also possible to obtain a cooling and heating effect by the convection method, and energy efficiency Good air conditioning can be realized.

  In the present embodiment, it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, in the present embodiment, the shape of the radiant panel 14 is a shape in which the cross-sectional shape is a downwardly convex mountain shape, but other shapes can of course be selected. For example, as shown in FIG. 7, it is good also as the radiation panel 220 integrally molded so that the cross-sectional shape may become a curved surface shape convex downward.

  Furthermore, the shape of the radiation panel 14 may be a flat radiation panel 230 as shown in FIG. The closer the shape of the radiant panel is to a flat surface, the more easily the air flowing into the center collides with each other, and the airflow is more likely to diffuse. On the contrary, the angle of the convex on the indoor surface 14b side (downward) of the radiant panel increases. The larger the air flow, the more likely the air flowing in the center to collide with each other, and the airflow tends to converge. Therefore, what is necessary is just to select the shape of the radiation panel 14 suitably according to the installation position and use condition of the radiation air-conditioning unit 10. FIG.

  As a reference example, as shown in FIG. 9A, the honeycomb-shaped airflow generation mechanism 240 is fixed to the indoor-side surface 14b of the radiation panel 14 and the second chamber portion 16b so as to block the entire surface of the outlet 22. It is also conceivable to rectify the air-conditioning air toward the indoor surface 14b.

  The airflow generation mechanism 240 is integrally formed of a steel plate or the like, and as shown in FIG. 9B, a plurality of rectangular airflow generation passages 240a extending in a straight line shape for passing air-conditioning air are formed on the entire surface. ing. In the present embodiment, the effective cross-sectional shape of the airflow generation passage 240a of the airflow generation mechanism 240 is mainly a hexagonal shape with sides of about 4 mm to 5 mm, and the airflow generation passage 240a is the center of gravity of the effective passage cross section. Having a length dimension of about 4 times or more, preferably about 6 times or more, more preferably about 8 times or more of the maximum length passing through.

  Of course, the cross-sectional shape of the airflow generation passage 240a is not limited to a hexagonal cross-section, and may be another polygonal square tube shape, or a circular or elliptical shape. In this way, a bundle of airflows of air-conditioning air along the indoor-side surface 14b of the radiation panel 14 is created by discharging the air-conditioning air through the airflow generation mechanism 240 having a large number of long and thin linear airflow generation passages 240a. In addition, the air volume at the outlets 22 can be evenly distributed.

  In the embodiment of the present invention described with reference to FIG. 1 and the like described above, the conditioned air is blown out from the blowout ports 22 at both ends on the long side of the radiant panel 14. It is good also as a structure which blows off and air-conditioning air is blown from four directions to the indoor side surface 14b of the radiation panel 14. In this case, if the radiation panel is shaped like a quadrangular pyramid, a film of air-conditioned air can be effectively formed on the indoor surface 14b of the radiation panel.

  Further, in the embodiment of the present invention, the flow path for guiding the conditioned air hitting the surface of the radiation panel 14 to the outlet 22 is formed by the space sandwiched between the radiation panel 14 and the second chamber portion of the housing. However, it is also possible to form only the radiation panel 14 or only the housing. In the case where the flow path is formed only by the radiant panel 14, for example, a hole is formed in the radiant panel 14 so that the air hitting the inner surface flows toward the surface side. However, it is necessary to have a flow channel shape that effectively forms a film of conditioned air on the surface side. In addition, even in the case of forming only with the housing, it is necessary to have a flow channel shape that effectively forms a film of conditioned air on the surface side of the radiation panel.

  Moreover, as other embodiment of this invention, it can be used also as an illumination radiation air-conditioning unit which combined the lighting fixture etc. in addition to the radiation cooling / heating function. According to the present invention, this modification can prevent condensation that occurs on the surface of the radiation panel. Therefore, the radiation panel is transparent or translucent, such as glass or plastic, which naturally tends to cause surface condensation. This is a modified example that can be used.

  FIG. 10 which shows this modification is a schematic sectional drawing of the radiation air-conditioning unit 300 provided with the lighting fixture 302. As shown in FIG. As shown in FIG. 10, the radiant air conditioning unit 300 includes a lighting fixture 302 and a support 304 for fixing the lighting fixture 302 in the second chamber portion 16 b of the housing 16. The support rod 304 is fixed to the inner side surface of the second chamber portion 16 b of the housing 16. Further, the radiation panel 14 is integrally formed of transparent or translucent glass or plastic material.

  In the present embodiment, the lighting fixture 302 is a lighting fixture that has a relatively small amount of heat generation compared to the brightness, such as an LED, a fluorescent lamp, or a plate-like light emitter (organic EL). In addition, since the lighting fixture 302 and the support rod 304 in this modification are provided in the housing | casing 16 in the shape of a line or a grid | lattice by a thin member, they can be installed without inhibiting the flow of air-conditioning air.

  Thus, according to the radiation air-conditioning unit 300 provided with the lighting fixture 302, it becomes unnecessary to arrange | position a lighting fixture and an air-conditioning unit separately on a ceiling surface, the effort concerning construction can be reduced significantly, and cost can also be reduced. it can. Further, by installing the lighting fixture and the air conditioning unit as one unit on the ceiling surface, the ceiling surface can be effectively used and also used as an interior.

It is a whole perspective view of a radiation air-conditioning unit concerning this embodiment. It is an AA line expanded sectional view of FIG. It is the BB line partial enlarged view of FIG. It is a schematic block diagram of the air conditioning system using the radiation air conditioning unit which concerns on this Embodiment. It is a schematic block diagram of the air conditioning system provided with the fan coil unit. It is a schematic sectional drawing of the radiation air conditioning unit using an air conditioner. It is a figure which shows the modification of a radiation panel. It is a figure which shows the modification of a radiation panel. It is a figure which shows the mechanism for making rectification | straightening of air-conditioning air from a blower outlet as a reference example. It is a schematic sectional drawing of the radiation air conditioning unit provided with the lighting fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Radiation air conditioning unit 12 Unit main body 14 Radiation panel 16 Housing | casing 18 Airflow adjustment board 22 Outlet 23 Internal guidance path 24 Airflow guide board 24a Standing part of airflow guide board 24b Inclination part of airflow guide board 100 Air conditioning system 102 Total heat exchanger 104 Air conditioner

Claims (9)

A casing that receives supply of air-conditioned air for radiant cooling and heating that is air-conditioned and a radiant panel that has an indoor-side surface facing the room, and cools the radiant panel by the conditioned air supplied to the casing A radiant air conditioning unit that cools the room by
A blowout port having directivity for generating a flow of conditioned air along the indoor side surface of the radiant panel from the vicinity of the end of the radiant panel toward the center,
An airflow guide plate that forms an internal guiding path for guiding the air-conditioned air to the outlet,
The airflow guide plate has an upright portion extending upward from an end edge portion of the radiation panel, and an inclined portion that curves from the lower end of the upright portion and continues to the radiation panel and forms the upper wall surface of the outlet. Radiant air conditioning unit characterized by that.   The radiation air conditioning unit according to claim 1, wherein the inclined portion has a curved shape slightly bulging downward.   The radiant air-conditioning unit according to claim 2, wherein the air outlet gradually expands as the distance between the inclined portion of the upper wall surface and the lower wall surface of the air outlet approaches the tip of the air outlet.   The air-conditioning air discharged from the blowout port is directed in a direction approaching the indoor side surface of the radiation panel, and the discharge direction of the blowout port is directed to the indoor side surface side of the radiation panel. The radiant air conditioning unit described.   The radiation air-conditioning unit according to any one of claims 1 to 4, wherein the outlet is provided on both sides of the radiant panel, and the radiant panel has a shape in which a central portion thereof protrudes indoors. The radiation air conditioning unit is
A plenum chamber that receives a supply of air-conditioned air for air-conditioned radiation cooling;
A second chamber that is supplied with conditioned air from the plenum chamber;
An airflow adjusting plate extending in a lateral direction between the plenum chamber and the second chamber and having a number of air holes;
The radiation air-conditioning unit according to any one of claims 1 to 5, wherein the radiation panel is provided in the second chamber. The radiation panel is made of a light transmissive material,
The radiation air-conditioning unit according to claim 1, wherein an illumination member for room illumination is provided inside the housing.   The radiant air conditioning unit according to any one of claims 1 to 7, wherein the radiant air conditioning unit is a unit for large temperature difference air conditioning.   The radiation air-conditioning unit according to claim 8, wherein the temperature of the air-conditioning air discharged from the outlet is about 5 to 10 ° C.

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