JP2006214695A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system using a floor radiation panel capable of preventing the waste of energy and coping with a case applying a free-access floor. <P>SOLUTION: This air conditioning system is provided with the radiation panel 51 having a heat medium flow channel 51b in which at least one of cold water and warm water flows as a heat medium, and a radiation plate receiving the heat from the heat medium flowing in the heat medium flow channel 51b and radiating the heat, on a floor 50 of an air-conditioned room, and the floor 50 of the air-conditioned room is formed by alternately arranging rows having the radiation panel 51 and rows 52 not having the radiation panel along a certain one wall surface of the air-conditioned room. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air conditioning system, and more particularly, to an air conditioning system using a floor radiating panel that can cope with a case where a free access floor is adopted while suppressing waste of energy.

  A radiation air conditioning system is known 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. The radiant air-conditioning system has excellent comfort because the occupants do not feel airflow and the sound is quiet. In addition, the radiant air-conditioning system requires a higher (lower) temperature of cold water (hot water) used to cool (warm) the radiant panel than an air-conditioning system that blows out low-temperature (high-temperature) air. I can say that.

As one type of radiant air conditioning system, an air conditioning system is known in which a radiant panel is laid on the floor of an air-conditioned room for heating. In a conventional air conditioning system using a radiant panel, a heat insulating material is laid on a floor plate of a building or a bottom plate of a tatami mat, and then the radiant panel is stacked thereon (see, for example, Patent Document 1). In addition, since the radiating panel is laid on the floor plate of the building or the bottom plate of the tatami mat through a heat insulating material, the radiating panel is generally laid on the entire floor of the air-conditioned room.
JP-A-6-180125 (paragraph 0006, FIG. 1, FIG. 2, etc.)

  However, if a radiating panel is laid on the entire floor of the air-conditioned room, energy may be wasted. In recent years, with the widespread use of OA equipment, many free access floors with spaces such as wiring under the floor have been adopted. However, if a radiation panel is laid on the entire surface of the free access floor, maintenance and inspection under the floor becomes impossible. There was an inconvenience.

  In view of the above-described problems, an object of the present invention is to provide an air conditioning system using a floor radiating panel that can suppress energy waste and can cope with a case where a free access floor is employed.

  In order to achieve the above object, an air conditioning system according to a first aspect of the present invention is a radiant panel 51 laid on a floor 50 of an air-conditioned room, for example, as shown in FIGS. And a radiation panel 51 having a heat medium flow channel 51b for flowing at least one of hot water as a heat medium and a radiation plate 51c that receives and radiates heat from the heat medium flowing through the heat medium flow channel 51b; The rows in which the radiation panels 51 are laid and the rows 52 in which the radiating panels 51 are not laid are alternately formed along a certain wall surface of the air-conditioned room.

  If comprised in this way, since the row | line | column with which the radiation panel was laid, and the row | line | column which is not laid are formed alternately, the area which a radiation panel occupies with respect to the floor surface of an air-conditioned room reduces, and input energy is reduced. be able to. Here, “cold water” is a heat medium for cooling the air-conditioned room, and “hot water” is a heat medium for heating the air-conditioned room. “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 which concerns on invention of Claim 2 is shown in FIG. 2, for example, The air conditioning system of Claim 1 WHEREIN: The floor 50 of a to-be-air-conditioned room is comprised by the free access floor.

  With this configuration, even when a radiant panel is laid on the floor of the air-conditioned room, electrical wiring, piping, etc. can be laid in the space under the floor, and the floor of the row where the radiant panel is not laid is turned over. It is possible to maintain and inspect electric wiring and piping laid in the space under the floor.

  In addition, the air conditioning system according to the invention described in claim 3 is an air conditioning system according to claim 1 or 2, in which the floor 50 of the air-conditioned room is a window of the air-conditioned room, for example, as shown in FIG. A row in which the radiating panels 51 are laid and a row 52 in which the radiating panels 51 are not laid are alternately formed along the plane; the heat medium flow to the radiating plates in the row in which the radiating panels 51 closest to the window surface of the air-conditioned room are laid The ratio occupied by the path 51b is configured to be larger than the ratio occupied by the heat medium flow path 51b with respect to the radiation plate in the row where the radiation panel 51b farthest from the window surface of the air-conditioned room is laid.

  If comprised in this way, the ratio which the heat-medium flow path with respect to the radiation plate of the row | line | column with which the radiation panel nearest to the window surface of an air-conditioned room was laid was laid the radiation panel furthest from the window surface of the air-conditioned room Since it is configured to be larger than the ratio of the heat medium flow path to the radiating plates in the row, it is possible to appropriately handle the heat load at the window portion that is larger than the portion other than the window portion of the air-conditioned room.

  Further, the air conditioning system according to the invention of claim 4 is the air conditioning system according to any one of claims 1 to 3, for example, as shown in FIG. 1 and FIG. The air blower 21 for supplying the air blown out from the air vent 51h is provided.

  If comprised in this way, the air in an air-conditioned room can be moved and it can prevent that the air in an air-conditioned room stagnates.

  Moreover, the air conditioning system which concerns on invention of Claim 5 is an air conditioning system of any one of Claim 1 thru | or 4 in the air conditioning system of Claim 1 thru | or 4, for example, as shown in FIG. A dehumidifier 40 to be removed is provided.

  If comprised in this way, since the dehumidifier which removes the moisture of the air in an air-conditioned room is provided, while the comfort in an air-conditioned room is further improved, it can process latent heat without causing condensation on the radiant panel Can do.

  According to the present invention, the rows in which the radiating panels are laid and the rows in which the radiating panels are not laid are alternately formed, so that the area occupied by the radiating panels on the floor surface of the air-conditioned room is reduced and energy waste is suppressed. Therefore, it is possible to provide an air conditioning system using a floor radiating panel that can cope with a case where a free access floor is adopted.

  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 fan filter unit (hereinafter referred to as “FFU”) 20 having a blower 21, a dehumidifier 40, a floor radiant panel 51 that is a radiant panel disposed on the floor 50 of the air-conditioned room 2, And a heat source device 61.

  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 blowing air from under the floor into 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. A suction duct 30 is connected to the intake port, and an underfloor duct 39 is connected to the air supply port. An air inlet 36 is connected to the suction duct 30 via a flexible duct and a chamber box 35. The underfloor duct 39 is a wind guide for sending air to the underfloor of the air-conditioned room 2.

  The FFU 20 is installed behind the ceiling of the air-conditioned room 2. However, depending on the circumstances of the installation space, it may be installed under the floor of the air-conditioned room 2, or may be installed in a separate space away from the air-conditioned room 2.

  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 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. Strictly speaking, as described above, during cooling, the floor radiating panel 51 does not radiate cold heat, but heat radiated from, for example, a person is absorbed by the floor radiating panel 51 having a low temperature. However, in this specification, for the sake of convenience, it is assumed that cold heat is also emitted.

  Here, the configuration of the floor surface of the air-conditioned room 2 will be described with reference to FIG. FIG. 2 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. 3, the structure of the floor radiation panel 51 is demonstrated. FIG. 3A is a plan view showing the base of the floor radiating panel arranged in the longitudinal direction other than the end in which the heat medium flow path 51b is laid, and FIG. 3B is arranged at the end. It is a top view which shows the base of a floor radiation panel. Moreover, FIG.3 (c) is CC sectional drawing in Fig.3 (a), FIG.3 (d) is DD sectional drawing. For convenience of explanation, the radiation plate 51c and the tile carpet 54 are omitted in FIGS. 3 (a) and 3 (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. 3 (b), the base 51a arranged at the end in the longitudinal direction where the heat medium flow path 51b is laid is provided with a curved portion connecting 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.

  Further, the floor panel may be modified as shown in FIG. FIG. 4 is a diagram for explaining a configuration of a modification of the floor radiating panel according to the embodiment of the present invention, in which (a) is a plan view showing a base of the floor radiating panel arranged at a portion other than the end, Is a plan view showing the base of the floor radiating panel disposed at the end, (c) is a CC cross-sectional view in (a), (d) is a DD cross-sectional view in (a). For convenience of explanation, the radiation plate 51c and the tile carpet 54 are omitted in FIGS. 4 (a) and 4 (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. 3). 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.

  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 (see FIG. 2) 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 device 61 that adjusts the temperature of cold water or hot water to be supplied to the heat medium flow path 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 floor radiating panel 51 and the FFU 20, introduces cold water whose temperature has increased during cooling, derives cold water whose temperature has decreased, and introduced hot water whose temperature has decreased during heating to increase the temperature. It is comprised so that warm water can be derived | led-out. The cold water (hot water) whose temperature has been adjusted by the heat source device 61 is led out from the heat medium outlet 61a, and the cold water (hot water) returned from the floor radiation panel 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, and a coil return pipe 84, a floor return pipe 85, and a floor return pipe 86 are connected to the common return pipe 89 in the direction toward the heat source unit 61. Are connected in the order shown. A pump 62 that pumps the heat medium is disposed in the common forward pipe 88. A ceiling bypass valve 97 is provided between the floor return pipe 85 and the floor return pipe 86.

  A common return pipe 88 on the downstream side of the pump 62 and a common return pipe 89 on the downstream side of 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 and the valves 91, 93, 95 to 98 are configured to be able to start and stop each device and open / close the damper and the valve.

With continued reference to FIG. 1, the operation of the air conditioning system 1 according to the embodiment of the present invention will be described. Note that FIG. 2 and FIG. 3 are referred to as appropriate for the reference numerals of the components.
(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 through the common pipes 88 and 89, the floor pipes 85 and 86, etc. 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 FFU 20 connected to the ducts 30 and 39, and the temperature rises to about 17 ° C. The cold water that has exchanged heat with the air flowing through the FFU 20 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 floor piping 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. 3) of the floor radiating panel 51 for each row where the floor radiating panel 51 is laid. The cold water that has flowed through the heat medium flow path 51 b (see FIG. 3) reaches the floor-retane header 59. The cold water flowing through the heat medium channel 51b exchanges heat with the radiation plate 51c (see FIG. 3), 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. Since the tile carpet 54 (see FIG. 3A) is placed on the radiation plate 51c, the radiation plate 51c does not come into direct contact with the air in the air-conditioned room 2 and no condensation occurs.

  The floor radiation panel 51 that has received cold from cold water and whose temperature of the radiation plate 51c (see FIG. 3) 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. Further, since the density of the heat medium flow path 51b of the floor radiating panel 51 in the perimeter portion is higher than that in other portions, the perimeter portion has a relatively large amount of radiant cooling heat and is larger than the interior portion. It is possible to appropriately handle the heat load. In parallel with the cooling by radiation, the dehumidifier 40 performs a latent heat treatment in the air-conditioned room 2.

  Further, cold air is introduced into the air-conditioned room 2 under the floor by the under-floor duct 39. 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 vent hole 51h (see FIG. 3) of the base 51a as a breeze through the vent hole 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. 3) 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. Air in the air-conditioned room 2 is sucked from the air control port 36 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 again introduced into the underfloor chamber. 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.

  The cold water that has flowed into the floor let header 59 from the heat medium flow path 51b (see FIG. 3) 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 floor radiation panel 51 can be first, and the cold / hot water coil 22 of the FFU 20 can be rear. Introducing cold water into the floor radiant panel 51 before the cold / hot water coil 22 and introducing cold water derived from the floor radiant panel 51 into the cold / hot water coil 22, thereby increasing the radiant cold heat from the floor radiant panel 51. In addition, the cold heat after passing through the floor radiating panel 51 can be secondarily used for heat exchange with air. 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 floor return pipe 86. The cold water flowing through the floor return pipe 86 flows into the common return pipe 89 from the floor letter header 59 through the heat medium flow path 51b (see FIG. 3) 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. 3), the heat is given to the radiation plate 51c (see FIG. 3), and the cold heat is radiated from the radiation plate 51c toward the air-conditioned room 2.

  The cold water flowing into the common return pipe 89 through the floor radiating panel 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 floor radiating panel 51 and has a temperature higher than that of the chilled water at the heat medium outlet 61a. Secondary use of 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 floor radiation panel 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. Moreover, when it is not desired to temporarily supply cold water to the floor radiating panel 51, the ceiling bypass valve 97 can be opened and bypassed. Further, the radiating panel 10 may be provided on the ceiling surface, and the radiant cooling may be performed from the ceiling together with the floor radiating panel 51. At this time, the ceiling return pipe 81 for guiding the cold water to the ceiling radiation panel 10 is connected to the common return pipe 89 close to the connection part of the floor return pipe 85, and the ceiling return pipe 82 for introducing the cold water from the ceiling radiation panel 10 is returned to the floor. It is good to connect to the common return pipe 89 close to the connection part of the pipe 86.

(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 flows into the floor return pipe 86. Hot water flowing through the floor return pipe 86 is introduced into the floor let 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. 3) 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. 3) 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. 3), 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 51c (see FIG. 3) 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. Further, since the density of the heat medium flow path 51b of the floor radiating 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 that in the interior portion. It is possible to appropriately handle the heat load.

  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 under the floor of the air-conditioned room 2 through the underfloor duct 39. 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. 3) 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. 3) is placed on the radiation plate 51c, but the warm air is blown into the air-conditioned room 2 so as to ooze out of the tile carpet 54. 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.

  The hot water flowing into the floor supply header 58 from the heat medium flow path 51b (see FIG. 3) once flows into the common return pipe 89. The hot water flowing into the common return pipe 89 from the floor supply header 58 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 floor radiating panel 51 and has a temperature lower than that of the hot water in the heat medium outlet 61a. However, the hot water flowing into the air-conditioned room 2 can be preheated. Secondary use of can be performed. The hot water introduced into the cold / hot water coil 22 exchanges heat with the air flowing through the FFU 20 connected to the ducts 30 and 39, and the temperature drops to about 30 ° C. The hot water that has exchanged heat with the air flowing through the FFU 20 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 can be introduced in the order of the cold / hot water coil 22 of the FFU 20 and the floor radiating panel 51 behind. 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 via the coil return pipe 84 flows into the heat medium flow path 51b (see FIG. 3) of the floor radiating panel 51 via the floor return pipe 85 and the floor supply header 58. When hot water flows through the heat medium flow path 51b, heat is given to the radiation plate 51c (see FIG. 3), 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. 3). 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 flowing into the common return pipe 89 through the floor radiating panel 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 again to the FFU 20 and the floor radiating panel 51.

  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 floor radiation panel 51, the ceiling floor bypass valve 97 can be opened and bypassed. Further, similarly to the cooling operation, the radiating panel 10 may be provided on the ceiling surface and the radiant heating may be performed from the ceiling together with the floor radiating panel 51.

  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 0037). 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 floor radiation panel 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 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 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

21 Blower 40 Dehumidifier 50 Floor 51 Radiation panel 51b Heat medium flow path 51c Radiation plate 51h Vent hole 52 Row where radiation panel is not laid

Claims (5)

A radiant panel laid on the floor of an air-conditioned room, comprising: a heat medium channel that flows at least one of cold water and hot water as a heat medium; and a radiation plate that receives and radiates heat from the heat medium flowing through the heat medium channel Having a radiating panel having;
The floors of the air-conditioned rooms were alternately formed with rows where the radiation panels were laid and rows where they were not laid along a certain wall surface of the air-conditioned room.
Air conditioning system. The floor of the air-conditioned room was composed of a free access floor;
The air conditioning system according to claim 1. The floors of the air-conditioned rooms are alternately formed with rows where the radiation panels are laid and rows where they are not laid along the window surface of the air-conditioned room;
The ratio of the heat medium flow path to the radiating plate in the row where the radiant panel closest to the window surface of the air-conditioned room is occupying the row where the radiant panel farthest from the window surface of the air-conditioned room is Configured to be larger than a ratio of the heat medium flow path to the radiation plate;
The air conditioning system according to claim 1 or 2. The radiation plate has a plurality of vent holes;
Provided with a blower for feeding air blown from the vent;
The air conditioning system according to any one of claims 1 to 3. 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 4.

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