JP2006214696A - Air conditioner system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner system capable of realizing both energy-saving and comfortableness by taking in both radiation and convection in a well-balanced state. <P>SOLUTION: This air conditioner system comprises a radiation panel 10 disposed on the ceiling surface of an air-conditioned room 2 and having a heat refrigerant flow passage flowing at least one of cold water and hot water as a heating medium and a radiation plate receiving heat from the heating medium flowing in the heating medium flow passage and radiating the heat and having a plurality of vent holes and a blower 21 moving an air so that the air passes the vent holes formed in the radiation panel 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air conditioning system, and more particularly to an air conditioning system that realizes both energy saving and comfort by incorporating radiation and convection in a balanced manner.

  The most widely used air conditioning system currently produces air with a temperature lower (higher) than the set temperature in the air-conditioned room during cooling (heating), and the air from the air outlet provided at an appropriate location in the air-conditioned room. The temperature of the air-conditioned room is adjusted by blowing out the air. In such an air conditioning system, a place where conditioned air does not spread is generated depending on the place of the air-conditioned room. The place where the air does not reach is not at the proper temperature and is not comfortable. On the other hand, when the blowout wind speed was increased in order to spread the harmonized air throughout, the person in the vicinity of the blowout outlet felt a draft and was inferior in comfort.

  Against the background of such problems, in recent years, a radiation air conditioning system has attracted attention as an air conditioning system that achieves both energy saving and comfort. The radiant air conditioning system is a system that cools (warms) a radiant panel installed on a ceiling surface, a floor surface, etc., and adjusts the temperature of the air-conditioned room by radiant heat from the radiant panel. In the radiant air-conditioning system, air is not blown out from the air outlet, so not only does the occupant feel the airflow, but the sound is quiet, the room temperature is uniform, and a smooth space can be experienced. In the radiant air conditioning system, the temperature of cold water (hot water) used to cool (warm) the radiant panel may be higher (lower) than that of an air conditioning system that blows out low-temperature (high-temperature) air. For this reason, the radiation air conditioning system can be said to be a more energy saving system. Radiant air conditioning systems have been reported in many cases in Europe and the United States.

  However, the radiant air-conditioning system may not be able to feel cool because the panel temperature cannot be reduced below the dew point temperature in order to prevent panel dew condensation under summer hot and humid weather conditions in Japan. In addition, due to system characteristics, there is a problem that it takes time until the air-conditioned room reaches an appropriate temperature after the system is started.

  In view of the above-described problems, an object of the present invention is to provide an air conditioning system that realizes both energy saving and comfort by incorporating radiation and convection in a balanced manner.

  In order to achieve the above object, an air conditioning system according to a first aspect of the present invention is a radiating panel 10 disposed on a ceiling surface of an air-conditioned room 2 as shown in FIGS. 1 and 2, for example. A heat medium flow path 13 for flowing at least one of cold water and hot water as a heat medium, and a radiation plate 11 formed with a plurality of vent holes 12 for receiving and radiating heat from the heat medium flowing in the heat medium flow path 13. A radiating panel 10; and a blower 21 that causes the air to flow so that the air passes through the ventilation holes 12 formed in the radiating panel 10 are provided.

  If comprised in this way, the temperature distribution in an air-conditioned room can be made substantially uniform by the radiant heat by a radiant panel and the convection of the air which passes the ventilation hole formed in the radiant panel. “Receiving heat” means not only receiving heat but also receiving heat. In other words, not only when the radiation plate is heated by the heat medium but also when it is cooled, the radiation plate is expressed as “heat receiving”. In addition, “radiating” is expressed in this way not only for heat but also for cold. That is, strictly speaking, cold heat is not radiated from the radiant panel, but for example, heat radiated from a human or the like is absorbed by the radiant panel having a low temperature and is not reflected. In this specification, for the sake of convenience, cold heat is also expressed as “radiating”.

  Moreover, the air conditioning system according to the invention described in claim 2 is, for example, as shown in FIGS. 1 and 2, in the air conditioning system according to claim 1, when the air-conditioned room 2 is cooled, the heat medium flow path is provided. 13, cold water is radiated from the radiation plate 11, and cold air is blown out from the vent 12 toward the air-conditioned room 2. When the air-conditioned room 2 is heated, hot water is passed through the heat medium flow path 13. The radiating plate 11 emits warm heat, and the air in the air-conditioned room 2 is sucked from the vent hole 12.

  With this configuration, when the air-conditioned room is cooled, cold water is radiated from the radiating plate by flowing cold water through the heat medium flow path, and cold air is blown out from the vent hole toward the air-conditioned room. The temperature distribution in the air-conditioned room can be made substantially uniform by the radiation of the cold heat from the air and the convection from the ceiling to the floor of the cold air having a relatively high density. In addition, when heating the air-conditioned room, hot water is allowed to flow through the heat medium flow path to radiate warm heat from the radiation plate, and air in the air-conditioned room is sucked from the vents, so that air with a relatively high temperature is covered. Staying in the vicinity of the ceiling of the air-conditioned room can be prevented, and the temperature distribution in the air-conditioned room can be made substantially uniform by the radiation of warm heat from the radiation plate and the convection of the air in the air-conditioned room.

    Further, the air conditioning system according to the invention described in claim 3 is a cold / hot water coil 22 for introducing a heat medium in the air conditioning system according to claim 2, as shown in FIG. In order to cool the air blown out from the vent hole 12 (see FIG. 2) during cooling of the air-conditioning chamber, the air comes into contact with the air, and in order to warm the air blown out from the air control port 36 during the heating of the air-conditioned room 2 A cold / hot water coil 22 is provided.

  With this configuration, the hot / cold water coil introduces the heat medium after flowing through the heat medium flow path, and comes into contact with the air to cool the air blown out from the vent holes during cooling, and is controlled during heating. Since it is equipped with a cold / hot water coil that comes into contact with the air to warm the air blown from the mouth, it can give cold air during cooling, hot air during heating, to the air that becomes the convection component, The cooling effect is improved during cooling, and the heating effect is improved during heating.

  Moreover, the air conditioning system which concerns on invention of Claim 4 is an air conditioning system of any one of Claim 1 thru | or 3 in the air conditioning system of any one of Claim 1 thru | or 3, for example, as shown in FIG. The air control port 36 is provided on the surface, and includes a air control port 36 that sucks air in the air-conditioned room 2 during cooling and blows warm air into the air-conditioned room 2 during heating.

  When configured in this way, the air-conditioning room is provided with a ventilation opening on the ceiling surface near the window of the air-conditioned room because air in the air-conditioned room is sucked during cooling and hot air is blown into the air-conditioned room during heating. It is possible to appropriately handle the heat load at the window where the heat load is larger than that in the room.

  In addition, the air conditioning system according to the invention described in claim 5 is arranged in the back of the ceiling in the air conditioning system according to claim 3 or 4 and connected to the blower 21, for example, as shown in FIG. An annular duct 30 is provided; the annular duct 30 is a first damper 31 that blocks a discharge-side duct of the blower 21, and a second damper that derives air from the duct between the first damper 31 and the blower 21. 32, a third damper 33 that shuts off a duct on the suction side of the blower 21, and a fourth damper 34 that introduces air from the duct between the third damper 33 and the blower 21; The opening 36 is connected to a duct between the first damper 31 and the third damper 33, and when the air-conditioned room 2 is cooled, the second and third dampers 32, 33 are opened and the first and Close the fourth dampers 31 and 34 and The second and third dampers 32 and 33 are configured to close together to the first and fourth dampers 31 and 34 to open when heating the adjustment chamber 2.

  If comprised in this way, the flow direction of the air which passes the ventilation hole formed in the radiation panel can be changed with one fan.

  In addition, an air conditioning system according to the invention described in claim 6 is an air conditioning system according to any one of claims 1 to 5, for example, as shown in FIG. A dehumidifier 40 for removing moisture is provided.

  If comprised in this way, since the dehumidifier which removes the humidity of the air in an air-conditioned room is provided, while the comfort in an air-conditioned room is further improved, the dew condensation of a radiation panel can be prevented.

  According to the present invention, the room to be air-conditioned is compared with the case where the temperature-adjusted air is simply blown out by the radiant heat from the radiant panel that introduces the heat medium and the convection of the air passing through the ventilation holes formed in the radiant panel. Therefore, it is possible to provide an air-conditioning system that achieves both energy saving and comfort by incorporating radiation and convection in a well-balanced manner.

  Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same or equivalent devices are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram illustrating an air conditioning system 1 according to an embodiment of the present invention. The air conditioning system 1 includes a ceiling radiating panel 10 that is a radiating panel installed on the ceiling of the air-conditioned room 2, a fan filter unit (hereinafter referred to as “FFU”) 20 having a blower 21 and a cold / hot water coil 22, and an annular shape. A duct 30, a dehumidifier 40, a floor radiation panel 51 that is a radiation panel disposed on the floor 50 of the air-conditioned room 2, and a heat source device 61 are provided.

  The ceiling radiating panel 10 is configured to be able to adjust the temperature in the air-conditioned room 2 by radiating heat rays that are electromagnetic waves. The heat rays radiated from the ceiling radiating panel 10 are cold during cooling and warm during heating. The cold heat is heat at a temperature lower than the set temperature of the air-conditioned room 2. The warm heat is heat at a temperature higher than the set temperature of the air-conditioned room 2. As described above, strictly speaking, during cooling, the ceiling radiating panel 10 does not radiate cold heat, but heat radiated from, for example, a person is absorbed by the ceiling radiating panel 10 having a low temperature. However, in this specification, for the sake of convenience, it is assumed that cold heat is also emitted.

  Here, with reference to FIG. 2, the structure of the ceiling radiation panel 10 is demonstrated. FIG. 2 is a perspective view of the single ceiling radiating panel 10 as seen from the back side of the ceiling. The ceiling radiating panel 10 includes a radiating plate 11 that radiates cold and hot heat toward the air-conditioned room 2, and a heat medium flow path 13 through which a heat medium that supplies the radiating plate 11 with cold and hot heat flows.

  The radiation plate 11 is a substantially rectangular plate and has a plurality of vent holes 12. The material of the radiation plate 11 is typically aluminum, but stainless steel or other materials with high thermal conductivity may be used. The plurality of air holes 12 formed in the radiation plate 11 are typically circular small holes. The size of the vent hole 12 formed in the radiation plate 11 is typically 3 mm to 15 mm, but the upper limit is preferably set from the viewpoint of decoration of the ceiling surface (so that the back of the ceiling cannot be seen from the vent hole). The lower limit is preferably 5 mm, and more preferably 8 mm, from the viewpoint of reducing the blown air speed in order to suppress drafting. The number of ventilation holes 12 formed in the radiation plate 11 is determined by the air volume and the velocity of the air that typically passes through the ventilation hole 12 through the ventilation hole 12 with respect to the size thereof. The The air volume is typically determined from the circulating air volume necessary for keeping the inside of the air-conditioned room 2 at a predetermined cleanliness. The wind speed is typically 0.05 to 0.35 m / s, but the upper limit is preferably 0.3 m / s, more preferably from the viewpoint that a person in the air-conditioned room 2 does not feel a draft. The lower limit is preferably 0.1 m / s, more preferably 0.15 m / s, from the viewpoint of implementing the effect of convection to the air-conditioned room 2 at 0.25 m / s. The shape of the radiation plate 11 may be a square, a triangle, or a polygon other than a rectangle. The shape of the radiating plate 11 may be appropriately selected in consideration of the shape of the air-conditioned room 2 and the relationship with other appliances such as lighting (shoulder).

  The heat medium flow path 13 is configured so that one of cold water or hot water flows through the heat medium flow path depending on whether it is cooling or heating, and the radiating plate 11 can receive cold heat or heat. Here, “cold water” is water that flows through the heat medium flow path 13 when the air-conditioned room 2 is cooled, and the temperature at the entrance of the ceiling radiating panel 10 is typically 15 to 20 ° C. In view of improving cooling efficiency, the upper limit is preferably 19 ° C., more preferably 18 ° C., and the lower limit is preferably 16 ° C., more preferably 17 ° C. from the viewpoint of preventing condensation. The “hot water” is water that flows through the heat medium flow path 13 when the air-conditioned room 2 is heated, and the temperature at the entrance of the ceiling radiating panel 10 is typically 28 to 45 ° C. From the viewpoint of reducing energy consumption, the upper limit is preferably 40 ° C., more preferably 38 ° C., and from the viewpoint of improving the heating efficiency, the lower limit is preferably 30 ° C., more preferably 34 ° C. In addition, from the viewpoint of heat moving from a high heat source to a low heat source, the expression of receiving cold heat may be uncomfortable, but the quality is lower than the ambient temperature to cool the air-conditioned room 2 In view of the fact that a high level of cold heat is required, the case where the radiation plate 11 is cooled by cold water is expressed as receiving cold heat for convenience.

  The heat medium flow path 13 is placed on the radiation plate 11 in an appropriately bent state. Typically, a copper pipe or a resin pipe is used for the heat medium flow path 13. Other materials may be used, but it is preferable to use a material that is excellent in bending workability and strong in bending. Further, the heat medium flow path 13 can adjust the amount of heat transfer to the radiation plate 11 by the length placed on the radiation plate 11, and if it is desired to give more heat to the radiation plate 11, it can be as much as possible. It is preferable to place a larger length on the radiation plate 11 by bending with a small bending radius. Moreover, although the heat medium flow path 13 is suitably fixed to the radiation plate 11, in order to be able to absorb expansion and contraction with respect to temperature changes, it is preferable to fix the length direction (axial direction) to a minimum. In this way, the heat medium passage 13 placed on the radiation plate 11 absorbs the expansion and contraction at the curved portion with respect to the expansion and contraction accompanying the temperature change. In addition, the heat medium flow path 13 is formed with a flexible portion 13a at one end for facilitating connection to the ceiling supply header 18 (see FIG. 4), and at the other end with a ceiling letter header 19 (see FIG. 4), a flexible portion 13b is formed to facilitate the connection.

  The shape of the cross section of the heat medium flow path 13 is a shape that can increase the contact area between the heat medium flow path 13 and the radiation plate 11 from the viewpoint of increasing heat transfer from the heat medium flow path 13 to the radiation plate 11. Have.

  Here, the shape of the heat medium flow path 13 will be described with reference to FIG. 3. FIG. 3 is a cross-sectional view of the heat medium flow path 13 attached to the ceiling radiating panel 10, (a) shows a cross section of the heat medium flow path according to the present embodiment, and (b) to (d) are modified examples. 2 shows a cross section of the heat medium flow path. As shown in FIG. 3A, the heat medium flow path 13 typically has a flat cross section. The heat medium flow path 13 having a flat cross section may be manufactured by using a mold having a flat cross section, or once a tube having a circular cross section is manufactured and deformed so that the cross section becomes flat. Good. The flatness ratio of the heat medium flow path 13 may be determined from the viewpoint of thermal stress accompanying expansion and contraction of the heat medium flow path 13, the flow speed capable of preventing erosion due to cold water or hot water flowing inside, and the like.

  Moreover, as shown in FIG.3 (b), it is good also considering the cross-sectional shape of the heat-medium flow path 13 as a semicircle shape. In this case, the heat medium flow path 13 is placed on the radiation plate 11 so that the portion corresponding to the diameter of the semicircular cross section is in contact with the radiation plate 11. Moreover, as shown in FIG.3 (c), the cross-sectional shape of the heat-medium flow path 13 may be made into a rectangular shape, and may be made into a triangular shape as shown in FIG.3 (d). When the cross-sectional shape is a rectangle or a triangle, the heat medium flow path 13 is placed on the radiation plate 11 so that one side of the rectangle or the triangle is in contact with the radiation plate 11. The heat medium flow path 13 when the cross-sectional shape is a semicircular shape, a rectangular shape, or a triangular shape is typically manufactured using a mold having a semicircular shape, a rectangular shape, or a triangular shape in cross section. . The cross-sectional shape of the heat medium passage 13 may be a polygon such as a pentagon or a hexagon other than the above.

  Compared with the case where the cross-sectional shape is a perfect circle by setting the cross-sectional shape of the heat medium flow channel 13 to be a flat shape, a semicircular shape, a rectangular shape, a triangular shape, or the like, the heat medium flow path 13 and the radiation plate 11 This increases the heat transfer from the heat medium flow path 13 to the radiating plate 11, and as a result, the amount of radiant heat from the radiating plate 11 can be increased. The “perfect circle” here is not a perfect circle in a strict sense, but generally means a circle that is a cross-sectional shape adopted by the piping, and includes those having some distortion. That is, the “perfect circle” referred to here is a cross-sectional shape of a pipe that is intended to have a substantially circular cross section.

  Moreover, when the cross-sectional shape of the heat medium flow path 13 is a flat shape, a semicircular shape, a rectangular shape, a triangular shape, or the like, the heat medium in the heat medium flow path 13 is compared with the case where the cross-sectional shape is a perfect circle. The flow rate is increased, and the heat transfer rate can be improved. If the flow rate of the heat medium in the heat medium flow path 13 having a flat, semicircular, rectangular or triangular cross-sectional shape is the same as the flow rate when the cross-sectional shape is a perfect circle, the cross-sectional flat shape Since the flow rate of the heat medium flowing through the heat medium flow path 13 such as is reduced, the conveyance power of the heat medium can be reduced.

  As shown in FIG. 4, the ceiling radiating panel 10 having the above-described configuration is laid on the ceiling surface of the air-conditioned room 2. FIG. 4 is a side view for explaining the arrangement of the ceiling radiating panel. The ceiling of the air-conditioned room 2 is typically constructed with a system ceiling. On the ceiling of the air-conditioned room 2, a plurality of breath lines 36 are arranged along the window side as air vents. In the direction perpendicular to the direction in which the breath line 36 is disposed, the illumination lines 38 and the ceiling radiating panel 10 are alternately disposed in a line. In addition, a ceiling supply header 18 and a ceiling letter header 19 are disposed so as to extend in a direction in which the plurality of ceiling panels 10 are connected in a row in which the plurality of ceiling radiating panels 10 are disposed. The ceiling supply header 18 has branches corresponding to the number of panels arranged in one row. A flexible portion 13 a of the heat medium flow path 13 is connected to the branch of the ceiling supply header 18. Further, the ceiling supply header 18 is connected to a ceiling forward pipe 81 (see FIG. 1). On the other hand, the ceiling letter header 19 also has a branching number of panels. A flexible portion 13 b of the heat medium flow path 13 is connected to the branch of the ceiling letter header 19. The ceiling letter header 19 is connected to a ceiling return pipe 82 (see FIG. 1). The ceiling supply header 18 and the ceiling letter header 19 may have branches equal to or more than the number of panels as a spare, and in this case, unused branches are blocked with plugs or the like.

  Returning to FIG. 1 again, the configuration of the air conditioning system 1 will be described. The FFU 20 includes a blower 21, a cold / hot water coil 22, and a filter 23. The blower 21 is installed for the purpose of giving movement to the air in the air-conditioned room 2. A cold / hot water coil 22 is installed on the outlet side of the blower 21. The cold / hot water coil 22 has a heat medium inlet for introducing cold water or hot water, and a heat medium outlet for deriving them. The heat medium inlet is connected to the coil forward pipe 83. The heat medium outlet is connected to the coil return pipe 84. A filter 23 is installed on the downstream side of the cold / hot water coil 22. The filter 23 removes dust in the air blown out from the FFU 20. The filter 23 is typically a filtration type filter, and is appropriately selected from a rough filter, a medium performance filter, a high performance filter, a HEPA filter and the like according to the cleanliness required of the air-conditioned room 2. The The filter 23 may be a static type or an adsorbing type other than the filtering type.

  The FFU 20 is arranged in the order of the air flow, the blower 21, the cold / hot water coil 22, and the filter 23, and these are housed in a case. The case of the FFU 20 is provided with an intake port for introducing air and an air supply port for deriving air. An annular duct 30 is connected to the intake port and the air supply port.

  The annular duct 30 is provided to enable switching of the direction of air passing through the vent holes of the ceiling radiating panel 10. The annular duct 30 is disposed behind the ceiling of the air-conditioned room 2. A first damper 31 is installed on the downstream side of the FFU 20 so that the air flowing through the annular duct 30 can be blocked. A second damper 32 is installed between the FFU 20 and the first damper 31 so that the inside and outside of the annular duct 30 can be ventilated. A third damper 33 is installed on the upstream side of the FFU 20 so that air flowing through the annular duct 30 can be blocked. A fourth damper 34 is installed between the FFU 20 and the third damper 33 so that the inside and outside of the annular duct 30 can be ventilated. The first to fourth dampers 31 to 34 are typically motor dampers. Each of the first to fourth dampers 31 to 34 is configured such that a signal cable is laid between the control device 60 and a signal from the control device 60 can be received to open and close the damper. Has been. A breeze line 36 serving as an air vent is connected to the annular duct 30 between the first damper 31 and the third damper 33 via a flexible duct and a chamber box 35.

  An underfloor duct 39 is branched from the downstream side of the annular duct 30 from the FFU 20 and the upstream side of the second damper 32. The underfloor duct 39 is a wind guide for sending air to the underfloor of the air-conditioned room 2. The underfloor duct 39 is provided with a damper 39a that blocks the flow of air flowing inside.

  The dehumidifier 40 uses a liquid desiccant, and is configured so that moisture in the air of the air-conditioned room 2 can be absorbed by the desiccant and removed. The desiccant is typically a lithium chloride solution. The dehumidifier 40 has a dehumidifying unit, a regenerating unit, and a heat pump unit. The process of absorbing the moisture in the air from which moisture is to be removed (hereinafter referred to as “treated air”) into the lithium chloride solution is performed in the dehumidifying section. The moisture absorbed in the lithium chloride solution moves to the regeneration unit, the regeneration unit is heated, the moisture evaporates, and the lithium chloride solution is regenerated. The heat pump unit is configured to circulate a refrigerant between the regenerating unit and the dehumidifying unit to cool the dehumidifying unit and heat the regenerating unit. In the heat pump unit, the refrigerant whose pressure is increased by the compressor is sent to the regeneration unit, and the refrigerant discharged from the regeneration unit is sent to the dehumidification unit.

  In addition, as the dehumidifier 40, you may use the thing using a solid desiccant, and the thing of a cooling dehumidification system. A dehumidifier using a solid desiccant uses silica gel, activated carbon, etc. as a desiccant, adsorbs moisture in the air to be treated to dehumidify it, and later heats the desiccant to evaporate the adsorbed moisture. Is configured to play. The cooling and dehumidifying method condenses and removes moisture by cooling the air to be treated to a predetermined dew point temperature with a cold water coil or the like.

The dehumidifier 40 configured as described above follows the dehumidifying process described below.
FIG. 5 is a schematic air diagram illustrating changes in the air state during the dehumidifying process. The vertical axis of the air diagram represents absolute humidity, and the horizontal axis represents temperature. Moreover, the scale shown on the upper left in the figure represents enthalpy. Here, a dehumidifying process for changing the air in the P1 state to the air in the P2 state will be described. A straight line LD connecting P1 and P2 indicates a dehumidification process by the dehumidifier 40 used in the air conditioning system 1 according to the present embodiment using a lithium chloride solution that is a liquid desiccant. In this case, since the cooled lithium chloride solution comes into contact with the air to be treated, the air to be treated is dehumidified while being cooled. The cooling energy required for dehumidification is h3-h2 enthalpy. A broken line SD in FIG. 5 indicates a dehumidifying process when a solid desiccant is used. In this case, heat is generated in the dehumidifying process, and the temperature of the processing air rises while being dehumidified once. Therefore, it is necessary to cool the processing air after dehumidifying to a predetermined absolute humidity. The cooling energy directly required for dehumidification is h4-h2 enthalpy, but it requires additional heat for regeneration of the desiccant. A broken line DH in FIG. 5 shows a process of cooling and dehumidification in which the processing air is cooled by a cooling coil or the like and moisture contained in the processing air is condensed. In this case, the process air is cooled (the absolute humidity is constant until the dew point temperature), and moisture is condensed and dehumidified in the process of cooling below the dew point temperature. After cooling to the dew point temperature of the predetermined absolute humidity, Heat to temperature. The cooling energy required for dehumidification is h3-h1 and the reheat energy is h2-h1, and a total of (h3-h1) + (h2-h1) enthalpy is required.

  As can be seen from FIG. 5, when a lithium chloride solution is used as the desiccant (straight line LD), energy required for dehumidification (cooling) is directly required because the heat of condensation of the heat pump is used to regenerate the lithium chloride aqueous solution. Just consume. When a solid desiccant is used (polygonal line SD), energy for cooling high-temperature air after dehumidification and heating energy for regenerating the solid desiccant are required. In the case of the cooling dehumidification method (polygonal line DH), cooling energy up to the target dew point temperature and reheating energy are required. From the above, when viewed comprehensively, it is preferable to use a dehumidifier using a lithium chloride solution as a desiccant. However, from the viewpoint of maintainability and dehumidification performance, a dehumidifier using a solid desiccant or a dehumidifier using a cooling dehumidification method may be used.

  Returning to FIG. 1 again, the configuration of the air conditioning system 1 will be described. The floor 50 of the air-conditioned room 2 is a free access floor. The free access floor 50 includes a portion where the floor radiating panel 51 is laid and a portion 52 where the floor radiating panel is not laid. The floor radiation panel 51 is configured to be able to adjust the temperature in the air-conditioned room 2 by radiating heat rays that are electromagnetic waves. The heat rays radiated from the floor radiating panel 51 are cold during cooling and warm during heating. The cold heat is heat at a temperature lower than the set temperature of the air-conditioned room 2. The warm heat is heat at a temperature higher than the set temperature of the air-conditioned room 2. The floor radiating panel 51 is also expressed as radiating cold as in the case of the ceiling radiating panel 10 (see paragraph 0021).

  Here, the configuration of the floor surface of the air-conditioned room 2 will be described with reference to FIG. FIG. 6 is a plan view for explaining the arrangement of floor radiating panels. The floor of the air-conditioned room 2 is alternately formed with rows in which the floor radiating panels 51 are laid and rows 52 in which the floor radiating panels are not laid along the wall surface on the window side. Since the floor of the air-conditioned room 2 is composed of a free access floor, the floor can be removed, and the electric wire or the like routed under the floor can be maintained. However, the row in which the floor radiating panels 51 are laid has a configuration that is substantially difficult to remove because the heat medium flow path 51b is laid on a plurality of divided free access floors. The heat medium passage 51b is laid on the floor radiating panel 51 so that the density of the row of windows (so-called perimeter portion) is high. Here, the “density of the heat medium flow path” is an area where the heat medium flow path is in contact with the radiation plate with respect to the total area of the radiation plate.

  Furthermore, with reference to FIG. 7, the structure of the floor radiation panel 51 is demonstrated. FIG. 7A is a plan view showing the base of the floor radiating panel arranged in the longitudinal direction where the heat medium flow path 51b is laid, except for the end, and FIG. 7B is arranged at the end. It is a top view which shows the base of a floor radiation panel. Moreover, FIG.7 (c) is CC sectional drawing in Fig.7 (a), FIG.7 (d) is DD sectional drawing. For convenience of explanation, the radiation plate 51c and the tile carpet 54 are omitted in FIGS. 7 (a) and 7 (b). The floor radiating panel 51 includes a base 51a in which a groove 51d for fitting the heat medium flow path 51b is formed, a heat medium flow path 51b for flowing one of cold water or hot water as a heat medium depending on whether it is cooling or heating, and a base A radiation plate 51c that protects the heat medium passage 51b installed in 51a and radiates cold or warm heat is provided. The bottom of the groove 51d has a semicircular cross section, and the diameter thereof is larger than the diameter of the cross section of the heat medium passage 51b. The bottom of the groove 51d may have a triangular, quadrilateral or other polygonal cross section other than a semicircular cross section, but the stability when the heat medium flow path 51b is laid in the groove 51d, and From the viewpoint of easy processing of the groove 51d, a semicircular cross section is preferable.

  The base 51a is formed with a plurality of vent holes 51h for blowing air into the air-conditioned room 2 so as to pass through the floor from the bottom of the groove 51d. The vent hole 51h has a width substantially equal to the diameter of the semicircular cross section of the groove 51d. Therefore, the air flows from the bottom of the base 51a so as to wrap around both sides of the heat medium passage 51b, exchanges heat with the heat medium, and is blown out to the air-conditioned room 2. The size and number of the vent holes 51h formed in the base 51a are typically determined by the amount and speed of air blown out from under the floor into the air-conditioned room 2. The air volume is typically determined in consideration of the balance with the amount of radiant heat from the floor radiant panel 51. The wind speed is typically 0.05 to 0.35 m / s, but the upper limit is preferably 0.3 m / s, more preferably from the viewpoint that a person in the air-conditioned room 2 does not feel a draft. The lower limit is preferably 0.1 m / s, more preferably 0.15 m / s, from the viewpoint of implementing the effect of convection to the air-conditioned room 2 at 0.25 m / s.

  As shown in FIG. 7 (b), the base 51a disposed at the end in the longitudinal direction where the heat medium flow path 51b is laid is provided with a curved portion connecting the two grooves 51d and the heat medium flow path 51b. A sleeve 51s is formed to guide under the floor. A radiation plate 51c is overlaid on the base 51a in which the heat medium flow path 51b is fitted. The radiation plate 51c is formed with a radiation plate vent so as to correspond to the vent 51h formed in the groove 51d of the base 51a. A tile carpet 54 having air permeability is further placed on the radiation plate 51c, and the floor surface of the air-conditioned room 2 is formed.

  A vent hole similar to the vent hole 51h formed in the base 51a is also formed in the free access floor 52 in the row where the floor radiating panel is not laid, so that a breeze can be blown out to the air-conditioned room 2. It is configured. A tile carpet is also placed on the free access floor 52 in a row where the floor radiating panel is not laid.

  Returning to FIG. 1 again, the configuration of the air conditioning system 1 will be described. Under the floor of the air-conditioned room 2, a floor supply header 58 and a floor letter header 59 are disposed. The floor supply header 58 has branches corresponding to the number of rows in which the floor radiation panels 51 of the air-conditioned room 2 are laid. One end of the heat medium flow path 51b of the floor radiating panel 51 in each row is connected to the branch of the floor supply header 58. The floor supply header 58 is connected to a floor piping 85. The floor letter header 59 has branches corresponding to the number of rows in which the floor radiation panels 51 of the air-conditioned room 2 are laid. The branch of the floor letter header 59 is connected to an end portion of the heat medium flow path 51b in each row that is not connected to the floor supply header 58. The floor return header 59 is connected to a floor return pipe 86. The heat medium flow path 51b, the floor supply header 58, and the floor letter header 59 may be connected by a flexible pipe.

  The air conditioning system 1 further includes a heat source unit 61 that adjusts the temperature of cold water or hot water to be supplied to the heat medium passages 13 and 51b. As the heat source device 61, a heat pump chiller, a cold / hot water generator, or the like is used. The heat source device 61 is typically installed in a space different from the air-conditioned room 2 such as a machine room. The heat source 61 passes through the radiating panels 10 and 51 and the FFU 20, introduces cold water whose temperature has increased during cooling, derives cold water whose temperature has decreased, and introduces hot water whose temperature has decreased during heating and increases the temperature. It is configured to be able to derive the warm water. The cold water (warm water) whose temperature is adjusted by the heat source device 61 is led out from the heat medium outlet 61a, and the cold water (warm water) returned from the radiation panels 10 and 51 is introduced from the heat medium inlet 61b.

  A common forward pipe 88 is connected to the heat medium outlet 61 a, and a coil forward pipe 83 is connected to the common forward pipe 88. On the other hand, a common return pipe 89 is connected to the heat medium introduction port 61b. The common return pipe 89 has a coil return pipe 84, a ceiling forward pipe 81, a floor forward pipe 85, and a ceiling in the direction toward the heat source unit 61. The return pipe 82 and the floor return pipe 86 are connected in the order shown here. A pump 62 that pumps the heat medium is disposed in the common forward pipe 88. A ceiling bypass valve 97 is disposed between the ceiling return pipe 81 and the floor return pipe 85 and the ceiling return pipe 82 and the floor return pipe 86.

  The common return pipe 88 on the downstream side of the pump 62 and the common return pipe 89 on the downstream side of the ceiling return pipe 82 and the floor return pipe 86 are connected by a pipe 92 provided with a backflow valve 91. The downstream common outbound pipe 88 and the common return pipe 89 are connected to a connection portion between the pipe 92 and the common forward pipe 88 and the common return pipe 89 by a pipe 94 provided with a backflow return valve 93, respectively. Yes. A forward piping gate valve 95 is disposed in the common forward piping 88 between the piping 92 and the piping 94. A return piping gate valve 96 is disposed in the common return piping 89 between the piping 92 and the piping 94. A connection part between the common forward pipe 88 and the coil forward pipe 83 and a connection part between the common return pipe 89 and the coil return pipe 84 are connected by a coil bypass pipe 99 provided with a coil bypass valve 98. Each of the backflow valve 91, the backflow valve 93, the forward piping gate valve 95, the return piping gate valve 96, and the coil bypass valve 98 is provided with a signal cable between the control device 60 and the control device 60. It is configured to receive a signal and to open and close the valve.

  The control device 60 receives a signal sent from a sensor (not shown) installed in the air-conditioned room 2 or an input device (not shown) of the central monitoring panel, and the heat source device 61, the pump 62, and the blower 21, the dehumidifier 40, the dampers 31 to 34, and the valves 91, 93, and 95 to 98 are configured to be able to start and stop each device and open and close the dampers and valves.

The operation of the air conditioning system 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.
(When cooling)
First, the operation during cooling will be described. When the cooling of the air-conditioned room 2 is started, the pump 62 is activated, and the circulation of the cold water flowing inside the common pipes 88 and 89 and the ceiling pipes 81 and 82 is started. When the pump 62 is activated, the heat source device 61 is activated. The heat source unit 61 works by introducing an energy source such as electricity or gas, and sets the temperature of the cold water led out from the heat source unit 61 to about 12 ° C. The cold water of about 12 ° C. flows through the common forward pipe 88 and reaches the coil forward pipe 83. At this time, the backflow valve 91, the backflow valve 93, the ceiling bypass valve 97, and the coil bypass valve 98 are closed, and the forward pipe gate valve 95 and the return pipe gate valve 96 are opened.

  The cold water that has reached the coil forward pipe 83 flows through the coil forward pipe 83 and is introduced into the cold / hot water coil 22 of the FFU 20. The temperature of the cold water introduced into the cold / hot water coil 22 is about 12 ° C. The cold water introduced into the cold / hot water coil 22 exchanges heat with the air flowing through the annular duct 30, and the temperature rises to about 17 ° C. The cold water that exchanges heat with the air flowing through the annular duct 30 is led out from the cold / hot water coil 22 and flows through the coil return pipe 84.

  Thereafter, the cold water flows into the ceiling forward pipe 81 and is introduced into the ceiling supply header 18 (see FIG. 4). The temperature of the cold water introduced into the ceiling supply header 18 is about 17 ° C. The cold water introduced into the ceiling supply header 18 is introduced into each of the plurality of ceiling radiating panels 10 arranged. The cold water introduced into the ceiling radiating panel 10 flows through the heat medium flow path 13 and reaches the ceiling letter header 19 (see FIG. 4). The cold water flowing through the heat medium flow path 13 exchanges heat with the radiation plate 11, the radiation plate 11 is cooled, and the temperature of the cold water rises. At this time, the cross section of the heat medium flow path 13 is flat (see FIG. 3A), and the contact area with the radiation plate 11 is increased as compared with the case where the cross section is circular. Heat exchange with the radiation plate 11 is promoted. Moreover, since the flow rate of the cold water which flows through the inside of the heat medium flow path 13 which has a flat cross section becomes quick compared with the case of a circular cross section, a heat transfer rate improves. On the other hand, when the heat transfer amount from the cold water to the radiation plate 11 is set to the same level as when the cross section of the heat medium flow path 13 is circular, and the flow rate of the cold water flowing through the heat medium flow path 13 is reduced, the pump 62 Power is reduced. Further, the temperature of the cold water flowing through the heat medium flow path 13 is about 17 ° C., and the radiation plate 11 does not condense in consideration of the humidity of the air-conditioned room 2. The temperature of the cold water flowing into the ceiling let header 19 is about 19 ° C.

  The ceiling radiant panel 10 that has received cold from cold water and the temperature of the radiation plate 11 has decreased radiates cold toward the air-conditioned room 2. Since the radiation of the cold heat from the ceiling radiating panel 10 is performed from the entire ceiling surface of the air-conditioned room 2, temperature unevenness hardly occurs in the air-conditioned room 2. In parallel with the cooling by radiation, the dehumidifier 40 performs a latent heat treatment in the air-conditioned room 2. Since the humidity adjustment by the dehumidifier 40 is performed, it is possible to prevent the radiation plate 11 from condensing.

  Here, focusing on the air on the ceiling, among the dampers provided in the annular duct 30, the second damper 32 and the third damper 33 are open, and the first damper 31 and the fourth damper 34 are Closed. The blower 21 of the FFU 20 is activated, the cold air cooled by the cold / hot water coil 22 and dust-removed by the filter 23 is blown out from the second damper 32 to the ceiling of the air-conditioned room 2. The ceiling of the air-conditioned room 2 is a ceiling chamber.

  The cold air blown out to the back of the ceiling of the air-conditioned room 2 is blown out into the air-conditioned room 2 as a breeze from the vent hole 12 formed in the radiation plate 11. At this time, the cold air exchanges heat with the heat medium flow path 13 of the ceiling radiation panel 10. If the wind is cooler, the wind is warmed up a little, and if the wind is warmer, the wind is cooled. As described above, the fine wind blown out from the vent hole 12 has a wind speed of about 0.05 to 0.35 m / s. This level of breeze is comfortable for those who are present in the air-conditioned room 2 without feeling drafts, and the convection caused by the breeze gives air movement to the air-conditioned room 2 and prevents air stagnation. Yes. At this time, air movement also occurs on the ceiling surface, and the air in the air-conditioned room 2 may be separately dehumidified by the dehumidifier 40, so that the ceiling radiating panel 10 is not condensed.

  The air in the air-conditioned room 2 is sucked from the breath line 36 serving as an air control port so as to balance with the cold air supplied to the air-conditioned room 2. The sucked air is guided to the FFU 20 for temperature adjustment and dust removal, and blown out from the vent hole 12 of the radiation plate 11 to the back of the ceiling again. Although not shown, the air-conditioned room 2 is introduced with a flow rate of outside air that satisfies the standards defined by the Building Standards Act and local regulations.

  Focusing on cold water again, the operation of the air conditioning system 1 during cooling will be described. The cold water that has flowed into the ceiling return header 19 (see FIG. 4) from the heat medium flow path 13 of the ceiling radiating panel 10 further flows into the common return pipe 89 and is introduced into the heat source device 61 through the heat medium inlet 61b.

  On the other hand, the cold water flowing from the coil return pipe 84 also flows into the floor feed pipe 85 and is introduced into the floor supply header 58. The temperature of the cold water introduced into the floor supply header 58 is about 17 ° C. The cold water introduced into the floor supply header 58 is introduced into the heat medium flow path 51b (see FIG. 7) of the floor radiant panel 51 for each row where the floor radiant panel 51 is laid. The cold water that has flowed through the heat medium flow path 51b (see FIG. 7) reaches the floor-retane header 59. The cold water flowing through the heat medium passage 51b exchanges heat with the radiation plate 51c (see FIG. 7), the radiation plate 51c is cooled, and the temperature of the cold water rises. The temperature of the cold water exchanged with the radiation plate 51c and introduced into the floor lettuce header 59 is about 19 ° C.

  The floor radiation panel 51 that has received cold from cold water and whose temperature of the radiation plate 51c (see FIG. 7) has decreased radiates cold toward the air-conditioned room 2. The radiation of the cold heat from the floor radiating panel 51 is not performed from the entire floor of the air-conditioned room 2, but the rows where the floor radiating panels 51 are laid and the rows 52 where they are not laid are alternately formed and radiated. Since heat transfer from the plate 51c to the free access floor 52 also occurs, it is possible to compensate for the cold heat radiation above the row where the floor radiating panel is not laid. In addition, since the density of the heat medium flow path 51b of the radiant panel 51 in the perimeter portion is higher than the other portions, the amount of radiant cooling heat in the perimeter portion is relatively large, and the perimeter portion is larger than the interior portion. The heat load can be appropriately handled.

  In addition, cold air is introduced into the air-conditioned room 2 under the floor by an underfloor duct 39 branched from the annular duct 30. The underfloor of the air-conditioned room 2 is an underfloor chamber. The cold air introduced into the underfloor chamber is blown out into the air-conditioned room 2 from the air vent 51h (see FIG. 7) of the base 51a as a breeze through the air vent of the radiation plate 51c. In addition, the cool air is blown out into the air-conditioned room 2 from the vent holes of the free access floor 52 in the row where no radiating panel is laid. A tile carpet 54 (see FIG. 7) is placed on the radiation plate 51c, but the cold air is blown out into the air-conditioned room 2 so as to ooze out from the tile carpet 54.

  The cold water that has flowed into the floor let header 59 from the heat medium flow path 51b (see FIG. 7) flows into the common return pipe 89 and is introduced into the heat source unit 61 through the heat medium inlet 61b. After the temperature is adjusted to about 12 ° C., the cold water introduced into the heat source device 61 is led out again from the heat medium outlet 61a to the common forward pipe 88 and used to cool the inside of the air-conditioned room 2. .

  In the air-conditioning system 1 according to the present embodiment, the FFU 20 is first in the cold water introduction order, but the radiating panels 10 and 51 are first, and the cold / hot water coil 22 of the FFU 20 is rear. For example, when the temperature of the cold water derived from the heat source device 61 is higher than the dew point temperature of the air-conditioned room 2, the cold water is introduced into the radiation panels 10 and 51 before the cold / hot water coil 22, and the radiation panels 10 and 51. By introducing the chilled water derived from the chilled / hot water coil 22, the radiant cooling heat from the radiating panels 10, 51 can be increased, and the chilled heat after passing through the radiating panels 10, 51 can be used for heat exchange with air. Secondary use is possible. In this case, the following operation is performed.

  First, the backflow valve 91 of the pipe 92 and the backflow return valve 93 of the pipe 94 are opened, and the forward pipe gate valve 95 and the return pipe gate valve 96 are closed. When the valve is switched, the pump 62 is activated, and the cold water led out from the heat medium outlet 61a flows through the common forward pipe 88. The cold water flowing through the common forward pipe 88 flows into the common return pipe 89 through the pipe 92 and flows into the ceiling return pipe 82 and the floor return pipe 86. The cold water flowing through the ceiling return pipe 82 passes from the ceiling letter header 19 (see FIG. 4) to the heat medium passage 13 of the ceiling radiating panel 10, the ceiling supply header 18 (see FIG. 4), and the ceiling return pipe 81, and the common return pipe 89. Flow into. When the cold water flows through the heat medium flow path 13, the heat is given to the radiation plate 11, and the heat is radiated from the radiation plate 11 toward the air-conditioned room 2. At this time, air is blown out to the air-conditioned room 2 through the vent hole 12 of the radiation plate 11 by the blower 21 of the FFU 20 activated in parallel. On the other hand, the cold water flowing through the floor return pipe 86 flows from the floor letter header 59 to the common return pipe 89 through the heat medium flow path 51b (see FIG. 7) of the floor radiating panel 51, the floor supply header 58, and the floor return pipe 85. . When the cold water flows through the heat medium flow path 51b (see FIG. 7), the heat is given to the radiation plate 51c (see FIG. 7), and the cold heat is radiated from the radiation plate 51c toward the air-conditioned room 2.

  The cold water that has flowed into the common return pipe 89 via the radiation panels 10 and 51 then flows into the coil return pipe 84 and reaches the common forward pipe 88 through the cold / hot water coil 22 and the coil forward pipe 83 of the FFU 20. The cold water flowing through the cold / hot water coil 22 exchanges heat with the air passing through the FFU 20. The chilled water flowing through the chilled / hot water coil 22 passes through the radiating panels 10 and 51 and has a temperature higher than that of the chilled water in the heat medium outlet 61a, but can precool the air blown into the air-conditioned room 2, Secondary use of cold water can be performed. The cold water flowing through the common forward pipe 88 through the cold / hot water coil 22 flows into the common return pipe 89 through the pipe 94. The cold water flowing through the common return pipe 89 flows into the heat source unit 61 from the heat medium inlet 61b, and the temperature is adjusted by the heat source unit 61. The cold water whose temperature has been lowered by the heat source device 61 is led out from the heat medium outlet 61a, flows through the common forward pipe 88, and is supplied to the radiation panels 10 and 51 and the FFU 20 again.

  Regardless of the order in which the cold water is introduced, if it is not desired to supply the cold water to the FFU 20, the coil bypass valve 98 can be opened and the cold water can be passed through the coil bypass pipe 99 to bypass the FFU 20. Further, when it is not desired to temporarily supply cold water to the radiating panels 10 and 51, the ceiling bypass valve 97 can be opened for bypassing. When cold water is not supplied to the radiant panels 10 and 51, the radiant panels 10 and 51 are not condensed even if the temperature of the cold water led out from the heat source unit 61 is lowered to about 7 ° C. or lower.

(When heating)
Next, the effect | action at the time of heating is demonstrated. During heating, the reverse flow valve 91 of the pipe 92 and the reverse flow return valve 93 of the pipe 94 are opened, and the forward pipe gate valve 95 and the return pipe gate valve 96 are closed. The ceiling bypass valve 97 and the coil bypass valve 98 are closed. When the valve is switched, the pump 62 is activated, and the hot water led out from the heat medium outlet 61a flows through the common forward pipe 88. The hot water flowing through the common forward pipe 88 flows into the common return pipe 89 through the pipe 92 and into the ceiling return pipe 82.

  The hot water flowing through the ceiling return pipe 82 is introduced into the ceiling letter header 19 (see FIG. 4). The temperature of the hot water introduced into the ceiling letter header 19 is about 36 ° C. The hot water introduced into the ceiling letter header 19 is introduced into each of the plurality of ceiling radiating panels 10 arranged. The hot water introduced into the ceiling radiating panel 10 flows through the heat medium flow path 13 and reaches the ceiling supply header 18 (see FIG. 4). The hot water flowing through the heat medium flow path 13 exchanges heat with the radiation plate 11, the radiation plate 11 is heated, and the temperature of the hot water decreases. At this time, the cross section of the heat medium flow path 13 is flat (see FIG. 3A), and the contact area with the radiation plate 11 is increased as compared with the case where the cross section is circular. Heat exchange with the radiation plate 11 is promoted. Moreover, since the flow rate of the hot water which flows through the inside of the heat medium flow path 13 which has a flat cross section becomes quick compared with the case of a circular cross section, a heat transfer rate improves. On the other hand, when the amount of heat transfer from the hot water to the radiation plate 11 is set to the same level as when the cross section of the heat medium flow path 13 is circular, and the flow rate of the hot water flowing through the heat medium flow path 13 is reduced, the power of the pump 62 Is reduced. The temperature of the hot water flowing into the ceiling supply header 18 is about 34 ° C.

  The ceiling radiant panel 10 that has received the heat from the hot water and has raised the temperature of the radiation plate 11 radiates the heat toward the air-conditioned room 2. Since the radiation of warm heat from the ceiling radiating panel 10 is performed from the entire ceiling surface of the air-conditioned room 2, temperature unevenness hardly occurs in the air-conditioned room 2.

  Focusing on the ceiling air at this time, among the dampers provided in the annular duct 30, the second damper 32 and the third damper 33 are closed, and the first damper 31 and the fourth damper 34 are closed. Is open. The blower 21 of the FFU 20 is activated, and the air behind the ceiling of the air-conditioned room 2 flowing into the annular duct 30 via the fourth damper 34 is heated by the cold / hot water coil 22 and removed by the filter 23, 1 passes through the first damper 31 and reaches the chamber box 35 immediately above the breathe line 36.

  The warm air flowing into the chamber box 35 is blown out from the breathe line 36 into the air-conditioned room 2. Since the breathe line 36 is disposed at the window (see FIG. 4), it is possible to appropriately handle the heat load of the perimeter portion that is larger than the interior portion. Moreover, the wind speed of the warm air blown out from the breathe line 36 is typically 1.0 to 2.5 m / s, and is blown out from the vent hole 12 (see FIG. 2) of the radiation plate 11 during cooling. Since it becomes larger than a wind speed (about 0.05-0.35 m / s), warm air reaches the floor surface of the air-conditioned room 2, and the air-conditioned room 2 can be heated efficiently.

  Air in the air-conditioned room 2 is sucked from the vent holes 12 (see FIG. 2) of the radiation plate 11 constituting the ceiling radiating panel 10 so as to balance the warm air blown from the breathe line 36 to the air-conditioned room 2. . The sucked air flows into the ceiling chamber formed in the back of the ceiling, then flows into the annular duct 30 from the fourth damper 34, and is guided to the FFU 20 for temperature adjustment and dust removal, and again from the breathe line 36 to be air-conditioned. Blow out into chamber 2. Although not shown, the air-conditioned room 2 is introduced with a flow rate of outside air that satisfies the standards defined by the Building Standards Act and local regulations.

  Focusing on hot water again, the operation of the air conditioning system 1 during heating will be described. The hot water that has flowed into the ceiling supply header 18 (see FIG. 4) from the heat medium flow path 13 of the ceiling radiating panel 10 once flows into the common return pipe 89.

  Now, when the point of focus moves from the ceiling to the floor, the hot water flowing through the common forward pipe 88 and flowing into the common return pipe 89 through the pipe 92 also flows into the floor return pipe 86. The hot water flowing through the floor return pipe 86 is introduced into the floor letter header 59. The temperature of the hot water introduced into the floor lettuce header 59 is about 36 ° C. The hot water introduced into the floor letter header 59 is introduced into the heat medium flow path 51b (see FIG. 7) of the floor radiation panel 51 for each row where the floor radiation panel 51 is laid. The hot water flowing through the heat medium flow path 51b (see FIG. 7) reaches the floor supply header 58. The hot water flowing through the heat medium flow path 51b exchanges heat with the radiation plate 51c (see FIG. 7), the radiation plate 51c is heated, and the temperature of the hot water decreases. The temperature of the hot water exchanged with the radiation plate 51c and introduced into the floor supply header 58 is about 34 ° C.

  The floor radiation panel 51 that has received the heat from the hot water and has raised the temperature of the radiation plate 51 c (see FIG. 7) radiates the heat toward the air-conditioned room 2. Although the radiation of warm heat from the floor radiating panel 51 is not performed from the entire floor of the air-conditioned room 2, the rows where the floor radiating panels 51 are laid and the rows 52 where they are not laid are alternately formed and radiated. Since heat transfer from the plate 51c to the free access floor 52 also occurs, it is possible to compensate for the thermal radiation above the row where the floor radiating panel is not laid. In addition, since the density of the heat medium passage 51b of the radiant panel 51 in the perimeter portion is higher than that in the other portions, the amount of radiant heat in the perimeter portion is relatively large, and the perimeter portion is larger than the interior portion. The heat load can be appropriately handled.

  Here, a small amount of warm air may be blown out from the floor surface to the air-conditioned room 2. In this case, warm air is introduced into the air-conditioned room 2 under the floor by the under-floor duct 39 branched from the annular duct 30. The underfloor of the air-conditioned room 2 is an underfloor chamber. The hot air introduced into the underfloor chamber was formed on the free access floor 52 in the row where the floor radiating panel was not laid, from the vent hole 51h (see FIG. 7) of the base 51a through the vent hole of the radiating plate 51c. From the ventilation hole, it blows off into the air-conditioned room 2 as a breeze. A tile carpet 54 (see FIG. 7) is placed on the radiation plate 51c, but the warm air is blown out into the air-conditioned room 2 so as to ooze out of the tile carpet 54. When warm air is not blown from the floor surface to the air-conditioned room 2, the damper 39a provided in the underfloor duct 39 is closed.

  The hot water flowing into the floor supply header 58 from the heat medium flow path 51b (see FIG. 7) once flows into the common return pipe 89. The hot water flowing into the common return pipe 89 from the floor supply header 58 merges with the hot water flowing into the common return pipe 89 from the ceiling supply header 18 and flows into the coil return pipe 84. The hot water flowing into the coil return pipe 84 flows through the coil return pipe 84 and is introduced into the cold / hot water coil 22 of the FFU 20. The temperature of the hot water introduced into the cold / hot water coil 22 is about 34 ° C. The hot water flowing through the cold / hot water coil 22 passes through the radiation panels 10 and 51 and has a temperature lower than that of the hot water in the heat medium outlet 61a, but can preheat the air blown into the air-conditioned room 2, Secondary use of warm water can be performed. The hot water introduced into the cold / hot water coil 22 exchanges heat with the air flowing through the annular duct 30, and the temperature drops to about 30 ° C. The hot water that exchanges heat with the air flowing through the annular duct 30 is led out from the cold / hot water coil 22 and flows through the coil forward pipe 83.

  The hot water flowing in the coil forward pipe 83 flows through the common forward pipe 88, the pipe 94, and flows into the common return pipe 89 on the downstream side of the return pipe gate valve 96. The hot water flowing into the common return pipe 89 is introduced into the heat source unit 61 from the heat medium introduction port 61b. The hot water having a temperature of about 30 ° C. introduced into the heat source device 61 is adjusted to a temperature of about 36 ° C., and is then led out again from the heat medium outlet 61 a to the common forward pipe 88 to heat the inside of the air-conditioned room 2. To be used.

  In the air conditioning system 1 according to the present embodiment, the hot water introduction sequence can be preceded by the cold / hot water coil 22 of the FFU 20, and the radiating panels 10 and 51 can be followed. In this case, the backflow valve 91 of the pipe 92 and the backflow return valve 93 of the pipe 94 are closed, and the forward pipe gate valve 95 and the return pipe gate valve 96 are opened. The pump 62 is activated, and the hot water led out from the heat medium outlet 61 a of the heat source device 61 flows through the common forward pipe 88. The hot water flowing through the common forward pipe 88 then flows into the coil forward pipe 83 and reaches the common return pipe 89 via the cold / hot water coil 22 and the coil return pipe 84 of the FFU 20. The hot water flowing through the cold / hot water coil 22 exchanges heat with the air passing through the FFU 20.

  The hot water that has reached the common return pipe 89 through the coil return pipe 84 flows into the heat medium flow path 13 of the ceiling radiating panel 10 through the ceiling forward pipe 81 and the ceiling supply header 18. When the hot water flows through the heat medium flow path 13, the heat is given to the radiation plate 11, and the heat is radiated from the radiation plate 11 toward the air-conditioned room 2. At this time, air is blown out from the breathe line 36 to the air-conditioned room 2 by the blower 21 of the FFU 20 activated in parallel, and the air in the air-conditioned room 2 is blown from the vent hole 12 of the radiation plate 11 to the back of the ceiling. Inhaled. The hot water led out from the heat medium flow path 13 flows into the common return pipe 89 through the ceiling letter header 19 and the ceiling return pipe 82.

  Further, the hot water that has reached the common return pipe 89 via the coil return pipe 84 flows into the heat medium flow path 51b (see FIG. 7) of the floor radiation panel 51 via the floor return pipe 85 and the floor supply header 58. When warm water flows through the heat medium flow path 51b, heat is given to the radiation plate 51c (see FIG. 7), and the heat is radiated from the radiation plate 51c toward the air-conditioned room 2. At this time, warm air may be guided under the floor using the underfloor duct 39, and a small amount of warm air may be blown out from the vent hole 51h (see FIG. 7). The hot water led out from the heat medium flow path 51 b flows into the common return pipe 89 through the floor let header 59 and the floor return pipe 86.

  The hot water that has flowed into the common return pipe 89 through the radiating panels 10 and 51 flows into the heat source unit 61 from the heat medium inlet 61b, and the temperature is adjusted by the heat source unit 61. The hot water whose temperature has been raised by the heat source device 61 is led out from the heat medium outlet 61a, flows through the common forward pipe 88, and is supplied to the FFU 20 and the radiation panels 10 and 51 again.

  Regardless of the order in which the hot water is introduced, when it is not desired to supply the hot water to the FFU 20, the coil bypass valve 98 can be opened and the hot water can be passed through the coil bypass pipe 99 to bypass the FFU 20. Moreover, when it is not desired to supply hot water to the radiation panels 10 and 51, the ceiling floor bypass valve 97 can be opened and bypassed.

  In the above description, the hole 12 formed in the radiation plate 11 has been described as a circular small hole (paragraph 0023), but other rectangular shapes (see FIG. 8A), on the slit (FIG. 8 ( b)), or a pattern may be formed by slits (see FIG. 8C).

  In the above description, the first damper 31 to the fourth damper 34 are described as motor dampers (paragraph 0034), but may be manual dampers.

  In the above description, the base 51a of the floor radiating panel 51 has been described as having the groove 51d having a width larger than the diameter of the heat medium flow path 51b (paragraph 0042), but is configured as a modification shown in FIG. It may be. FIG. 9A is a plan view showing the base of the floor radiating panel arranged in the longitudinal direction where the heat medium flow path 51b is laid, except for the end, and FIG. 9B is arranged at the end. It is a top view which shows the base of a floor radiation panel. Moreover, FIG.9 (c) is CC sectional drawing in Fig.9 (a), FIG.9 (d) is DD sectional drawing. For convenience of explanation, the radiation plate 51c and the tile carpet 54 are omitted in FIGS. 9 (a) and 9 (b). In the floor radiating panel 51 ′ according to this modification, the width of the groove 51d is substantially the same as the diameter of the heat medium flow path 51b, and the air flow path 51r through which air flows is provided at the bottom of the groove 51d. It is formed along the length direction of 51b. In the groove 51d, air discharge ports 51m having a width larger than the diameter of the heat medium flow path 51b are formed at predetermined intervals in the length direction.

  In the floor radiating panel 51 'according to this modification, air enters from the bottom of the base 51a, reaches the air flow path 51r, and flows toward the air discharge port 51m. The air flowing through the air flow path 51r exchanges heat with the heat medium flowing through the heat medium flow path 51b. The air that has reached the air discharge port 51m flows so as to wrap around both sides of the heat medium flow path 51b, and is blown out to the air-conditioned room 2 through the vent holes formed in the radiation plate 51c and the tile carpet 54. In the floor radiating panel 51 ′ according to this modification, heat exchange between the air and the heat medium flow path 51b is promoted and the width of the groove 51d is larger than that of the floor radiating panel 51 (see FIG. 7). Since it is almost the same as the diameter of the channel 51b, the contact area between the heat medium channel 51b and the base 51a is increased, and the thermal conductivity is improved. Therefore, the cooling (heating) efficiency is improved.

  In the above description, the temperature of the cold water led out from the heat source device 61 during cooling is assumed to be about 12 ° C. (paragraph 0051). However, an air conditioner or the like may be provided in the common forward pipe 88 on the downstream side of the pump 62 and on the upstream side of the connection portion with the pipe 92, and the temperature of the cold water led out from the heat source unit 61 during cooling may be about 7 ° C. If it does in this way, before introducing cold water to radiation panel 10, 51 grade, it can be made to introduce into an air conditioner, and cold energy can be used. However, the coefficient of performance of the heat source device 61 can be improved by setting the temperature of the cold water derived from the heat source device 61 to be higher.

It is a figure explaining the air-conditioning system concerning an embodiment of the invention. It is the perspective view which looked at the ceiling radiation panel from the ceiling back side. It is sectional drawing of the heat medium flow path attached to a ceiling radiation panel. (A) shows the cross section of the heat medium flow path which concerns on this Embodiment, (b)-(d) has shown the cross section of the heat medium flow path of a modification. It is a downside figure explaining the arrangement situation of a ceiling radiation panel. It is a typical air line figure explaining the change of the state of the air of a dehumidification process. It is a top view explaining the arrangement | positioning condition of a floor radiation panel. It is a figure explaining the structure of a floor radiation panel. (A) is a plan view showing the base of the floor radiating panel other than the end of the row, (b) is a plan view showing the base of the floor radiating panel at the end of the row, and (c) is a CC in (a). Sectional drawing and (d) are DD sectional drawings in (a). It is a top view which shows the radiation plate of a ceiling radiation panel. (A)-(c) has shown the modification of the radiation plate which concerns on this Embodiment. It is a figure explaining the structure of the modification of a floor radiation panel. (A) is a plan view showing the base of the floor radiating panel other than the end of the row, (b) is a plan view showing the base of the floor radiating panel at the end of the row, and (c) is a CC in (a). Sectional drawing and (d) are DD sectional drawings in (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioning system 2 Air-conditioned room 10 Ceiling radiation panel 11 Radiation plate 12 Vent hole 13 Heat medium flow path 21 Blower 22 Cold / hot water coil 30 Annular duct 31 1st damper 32 2nd damper 33 3rd damper 34 4th Damper 36 Air outlet 40 Dehumidifier

Claims (6)

A radiant panel disposed on a ceiling surface of an air-conditioned room, a heat medium flow channel for flowing at least one of cold water and hot water as a heat medium, and a plurality of radiating panels that receive and radiate heat from the heat medium flowing through the heat medium flow channel A radiation plate having a ventilation hole formed thereon;
A blower for causing the air to flow through the vents formed in the radiating panel;
Air conditioning system. When cooling the air-conditioned room, cold water is flowed through the heat medium flow path to radiate cold heat from the radiation plate, and cool air is blown out from the vent hole toward the air-conditioned room;
When heating the air-conditioned room, hot water is flowed through the heat medium flow path to radiate heat from the radiation plate, and the air in the air-conditioned room is sucked from the vent hole;
The air conditioning system according to claim 1. A cold / hot water coil for introducing the heat medium, which is in contact with the air to cool the air blown from the vent hole during cooling of the air-conditioned room, and from the air control opening during heating of the air-conditioned room Provided with a cold / hot water coil in contact with the air to warm the blown air;
The air conditioning system according to claim 2. An air control opening disposed on a ceiling surface near the window of the air-conditioned room, the air intake opening sucking air in the air-conditioned room during cooling and blowing out hot air into the air-conditioned room during heating;
The air conditioning system according to any one of claims 1 to 3. An annular duct disposed behind the ceiling and connected to the blower;
The annular duct includes a first damper that shuts off a discharge-side duct of the blower, a second damper that leads out air from a duct between the first damper and the blower, and a suction side of the blower A third damper for blocking the duct of the second and a fourth damper for introducing air from the duct between the third damper and the blower;
The air restriction port is connected to a duct between the first damper and the third damper, and when the air-conditioned room is cooled, the second and third dampers are opened, and the first and third dampers are opened. The fourth damper is closed and the first and fourth dampers are opened and the second and third dampers are closed when heating the air-conditioned room;
The air conditioning system according to claim 4. A dehumidifier for removing moisture from the air in the air-conditioned room;
The air conditioning system according to any one of claims 1 to 5.

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