Patent Publication Number: US-2022221166-A1

Title: Humidifying unit

Description:
TECHNICAL FIELD 
     The present disclosure relates to a humidifying unit. 
     BACKGROUND 
     Patent Literature 1 discloses a humidity control device that humidifies a room using a first flow path that discharges air introduced from outside to the outside and a second flow path that supplies air introduced from the outside to a room. The humidity control device is installed in an attic and includes a heater and a humidity control member. Air flowing through the first flow path is discharged to the outside after moisture in the air is adsorbed by the humidity control member. Air flowing through the second flow path is heated by the heater, then humidified by the humidity control member, and supplied into the room. 
     PATENT LITERATURE 
     
         
         PATENT LITERATURE 1: Japanese Laid-Open Patent Publication No. 2006-170492 
       
    
     SUMMARY 
     A humidifying unit according to the present disclosure is a humidifying unit that humidifies a target space, the humidifying unit including a casing having a first ventilation path and a second ventilation path through which air introduced from outside flows, a moisture adsorbing material that adsorbs moisture in the air flowing through the first ventilation path, releases the moisture to the air flowing through the second ventilation path, and humidifies the air, and a heater that is provided in the casing and heats the moisture adsorbing material or the air before humidification flowing through the second ventilation path, in which at least a part of the casing is exposed to the target space. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of a humidifying unit according to one or more embodiments. 
         FIG. 2  is an external perspective view of a casing body of the humidifying unit. 
         FIG. 3  is a schematic plan view of the casing body with a top panel removed. 
         FIG. 4  is a schematic sectional view of the casing body as viewed from a front side. 
         FIG. 5  is a plan view of a moisture adsorbing rotor. 
         FIG. 6  is a perspective view of a heater. 
         FIG. 7  is a schematic diagram illustrating a modification of an air supply structure in the humidifying unit. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, one or more embodiments of the present disclosure will be described with reference to the drawings. 
     &lt;Overall Configuration of Humidifying Unit&gt; 
       FIG. 1  is a schematic diagram of a humidifying unit according to one or more embodiments. A humidifying unit  3  humidifies and ventilates a target space S 1 . The target space S 1  is, for example, a space in a room partitioned by a ceiling wall  4 , a side wall  5 , and a floor wall (not illustrated). 
     The humidifying unit  3  introduces and humidifies outdoor air, and releases the humidified air to the target space S 1 . The humidifying unit  3  includes a moisture adsorbing rotor  41 , a heater  42 , a first fan  43 , a second fan  44 , a humidity sensor  45 , a controller  46 , a casing  47  accommodating the above devices  41  to  46 , an air supply duct  48 , and an exhaust duct  49 . 
     The casing  47  includes a casing body  50 , a panel  51 , an air supply connection pipe  52 , and an exhaust connection pipe  53 . 
     Most of the casing body  50  is disposed in an attic space S 2 , and a lower end of the casing body  50  is disposed to penetrate the ceiling wall  4 . The attic space S 2  is a space formed above the ceiling wall  4 . 
     The panel  51  is detachably attached to a lower surface of the casing body  50 , and the entire panel  51  is exposed to the target space S 1 . The panel  51  is provided with an opening that communicates inside of the casing body  50  with the target space S 1 , and this opening serves as a release port  54  that releases air from the casing body  50  to the target space S 1 . The release port  54  is provided with a temperature and humidity sensor  60  that detects temperature and humidity of the air released from the release port  54 . The release port  54  is not provided with a flap that adjusts a wind direction. 
     One end of the air supply connection pipe  52  and one end of the exhaust connection pipe  53  are disposed in the casing body  50 . An opening on the other end of the air supply connection pipe  52  is an air supply port  55  that sucks outdoor air. An opening on the other end of the exhaust connection pipe  53  is an exhaust port  56  that discharges air to outdoor. The air supply port  55  and the exhaust port  56  may be constituted by openings formed in the wall surface of the casing body  50  without using the air supply connection pipe  52  and the exhaust connection pipe  53 . 
     The casing  47  has a first ventilation path P 1  and a second ventilation path P 2  through which air introduced from the outside flows. The first ventilation path P 1  is a ventilation path through which outdoor air is introduced into the casing body  50  from the air supply port  55  and flows to the exhaust port  56 . The second ventilation path P 2  is a ventilation path through which outdoor air is introduced into the casing body  50  from the air supply port  55  and flows to a communication port  50   a  (described later) in front of the release port  54 . The casing  47  has a third ventilation path (not illustrated) that discharges the air in the target space  51  to the outside. 
     One end of the air supply duct  48  is connected to the air supply connection pipe  52  of the casing  47 , and the other end of the air supply duct  48  penetrates the side wall  5  and communicates with the outside. The air supply duct  48  according to one or more embodiments also serves as a first air supply duct that introduces outdoor air from the air supply port  55  into the first ventilation path P 1  and a second air supply duct that introduces outdoor air from the air supply port  55  into the second ventilation path P 2 . 
     One end of the exhaust duct  49  is connected to the exhaust connection pipe  53  of the casing  47 , and the other end of the exhaust duct  49  penetrates the side wall  5  and communicates with the outside. As a result, the air flowing through the first ventilation path P 1  is discharged from the exhaust port  56  to the outside through the exhaust duct  49 . 
     The moisture adsorbing rotor  41  is disposed in a midway of the first ventilation path P 1  and in a midway of the second ventilation path P 2 . The moisture adsorbing rotor  41  is configured to remove moisture from the air flowing through the first ventilation path P 1  and release the moisture to the air flowing through the second ventilation path P 2  to humidify the air. The heater  42  is provided in a midway of the second ventilation path P 2  and heats air before humidification flowing through the second ventilation path P 2 . Detailed configurations of the moisture adsorbing rotor  41  and the heater  42  will be described later. 
     The first fan  43  is disposed near the exhaust port  56  in the first ventilation path P 1  and generates an air flow in the first ventilation path P 1 . Specifically, the first fan  43  is disposed at a position where outdoor air can be introduced into the first ventilation path P 1  through the air supply duct  48  and at a position where air deprived of moisture by the moisture adsorbing rotor  41  can be discharged to the outside through the exhaust duct  49 . 
     The second fan  44  is disposed near the release port  54  in the second ventilation path P 2  and generates an air flow in the second ventilation path P 2 . Specifically, the second fan  44  is disposed at a position where outdoor air can be introduced into the second ventilation path P 2  through the air supply duct  48  and at a position where air humidified by the moisture adsorbing rotor  41  can be released to the target space S 1  from the release port  54 . 
     The humidity sensor  45  is provided in the casing body  50  and detects humidity of the target space S 1 . A detection value of the humidity sensor  45  is output to the controller  46 . The controller  46  controls the moisture adsorbing rotor  41 , the heater  42 , the first fan  43 , and the second fan  44  on the basis of the detection value of the humidity sensor  45  and the like. 
     The humidifying unit  3  performs a humidifying operation and a ventilation operation. 
     In the humidifying operation, the controller  46  drives the moisture adsorbing rotor  41 , the heater  42 , the first fan  43 , and the second fan  44 . As a result, outdoor air passes through the air supply duct  48  and is introduced into the first ventilation path P 1  and the second ventilation path P 2  of the casing body  50 . Moisture in the air introduced into the first ventilation path P 1  is deprived of by the moisture adsorbing rotor  41 , and the air deprived of the moisture passes through the exhaust duct  49  and is discharged to the outside. Meanwhile, the air introduced into the second ventilation path P 2  is humidified by the moisture adsorbing rotor  41 , and the humidified air is released from the release port  54  to the target space  51 . 
     In the ventilation operation, the controller  46  drives the first fan  43 , and the second fan  44  but does not drive the moisture adsorbing rotor  41  and the heater  42 . As a result, outdoor air passes through the air supply duct  48  and is introduced into the second ventilation path P 2  of the casing body  50 . The air introduced into the second ventilation path P 2  is released from the release port  54  to the target space S 1  without being humidified by the moisture adsorbing rotor  41 . At this time, an air volume of the released air from the release port  54  to the target space S 1  is set to be larger than an air volume of the discharged air from the target space S 1  to the outdoors because of the third ventilation path. Therefore, the inside of the target space S 1  has a positive pressure due to the air released from the release port  54 . As a result, the air in the target space S 1  leaks out of the target space S 1 , and the target space S 1  can be ventilated. 
     &lt;Casing Body&gt; 
       FIG. 2  is an external perspective view of the casing body  50  of the humidifying unit  3 . The casing body  50  has a rectangular parallelepiped box shape. In the following description, “up”, “down”, “left”, “right”, “front”, “rear”, “front surface”, and “back surface” mean directions when the casing body  50  shown in  FIG. 2  is viewed from the front side (from the front left of the drawing) unless otherwise specified. 
     The air supply connection pipe  52  and the exhaust connection pipe  53  are provided on a back surface of the casing body  50 . The communication port  50   a  is formed in a part of the lower surface of the casing body  50 , and the communication port  50   a  communicates with the release port  54  (see  FIG. 1 ) of the panel  51 . The casing body  50  extends in a direction (left-right direction) horizontally orthogonal to a direction (front-rear direction) in which air enters and exits by the air supply connection pipe  52  and the exhaust connection pipe  53 . In the casing body  50 , devices such as the moisture adsorbing rotor  41 , the first fan  43 , and the second fan  44  are disposed to be distributed to the left and right (see  FIG. 3 ). 
       FIG. 3  is a schematic plan view of the casing body  50  with a top panel removed.  FIG. 4  is a schematic sectional view of the casing body  50  as viewed from the front side. As shown in  FIGS. 3 and 4 , the casing body  50  is provided with a partition  61  that divides an internal space of the casing body  50  into two parts which are upper and lower parts. The casing body  50  is provided with partitions  62  and  63  that divide a space above the partition  61  into three parts of left and right, and a partition  64  that divides a space below the partition  61  into two parts. 
     The partition  63  has a pair of vertical plates  63   a  and  63   c  extending in the front-rear direction (up-down direction in  FIG. 3 ) in plan view, and an inclined plate  63   b  connecting the vertical plates  63   a  and  63   c . The partition  64  has vertical plates  64   a ,  64   c , and  64   e  extending in the front-rear direction in plan view, a horizontal plate  64   b  connecting the vertical plates  64   a  and  64   c , and an inclined plate  64   d  connecting the vertical plates  64   c  and  64   e.    
     In the above configuration, the partitions  61  to  64  form a first space R 1 , a second space R 2 , a third space R 3 , a fourth space R 4 , and a fifth space R 5  inside the casing body  50 . The configuration that divides the internal space of the casing body  50  is not limited to the embodiments described here. 
     The air supply connection pipe  52  is provided at a position corresponding to the second space R 2  on the back surface of the casing body  50 , and the air supply port  55  of the air supply connection pipe  52  communicates with the second space R 2 . The exhaust connection pipe  53  is provided at a position corresponding to the fourth space R 4  on the back surface of the casing body  50 , and the exhaust port  56  of the exhaust connection pipe  53  communicates with the fourth space R 4 . The communication port  50   a  is formed at a position corresponding to the fifth space R 5  on the lower surface of the casing body  50 . 
     In the fourth space R 4 , the first fan  43  is provided on a lower surface of the partition  61 . A suction port  43   a  that sucks air is formed on a lower surface of the first fan  43 , and a blowout port  43   b  that blows out air is formed on a rear side of the first fan  43 . The exhaust connection pipe  53  is connected to the blowout port  43   b . In the first space R 1 , a first motor  57  that rotates the first fan  43  is disposed. The first motor  57  penetrates the partition  61 , is connected to an upper part of the first fan  43 , and rotates the first fan  43  with an air volume larger than an air volume of the second fan  44 . 
     In the fifth space R 5 , the second fan  44  is provided on the partition  61 . On an upper surface of the second fan  44 , a suction port  44   a  that sucks air is formed. The suction port  44   a  penetrates the partition  61  and communicates with the third space R 3 . On a lower surface of the second fan  44 , a second motor  58  that rotates the second fan  44  is disposed. A blowout port  44   b  through which air is blown out is formed on the front side of the second fan  44 . The blowout port  44   b  is connected to a release duct  59  extending in the up-down direction in the fifth space R 5  and having a quadrangular cross section. An upper end of the release duct  59  is closed. A lower end opening of the release duct  59  communicates with the communication port  50   a  of the casing body  50 . 
     The moisture adsorbing rotor  41  is disposed between the first fan  43  and the second fan  44  and penetrates the partition  61 . The moisture adsorbing rotor  41  is disposed below the inclined plate  63   b  and the vertical plate  63   c  of the partition  63  in plan view. The moisture adsorbing rotor  41  is disposed above the inclined plate  64   d  and the vertical plate  64   e  of the partition  64  in plan view. In other words, the moisture adsorbing rotor  41  is disposed across the second space R 2  and the third space R 3 . The moisture adsorbing rotor  41  is disposed across the fourth space R 4  and the fifth space R 5 . 
     &lt;Moisture Adsorbing Rotor&gt; 
       FIG. 5  is a plan view of the moisture adsorbing rotor  41 . The moisture adsorbing rotor  41  has a moisture adsorbing material  41   a , a ring gear  41   b , a pinion gear  41   c , and a support frame  41   d.    
     The moisture adsorbing material  41   a  is a desiccant material having an annular shape. When the moisture adsorbing material  41   a  has a low temperature, the moisture adsorbing material  41   a  adsorbs moisture from air when the air passes through the moisture adsorbing material  41   a . When the moisture adsorbing material  41   a  has a high temperature, the moisture adsorbing material  41   a  releases moisture to air and humidifies the air when the air passes through the moisture adsorbing material  41   a.    
     The ring gear  41   b  includes an external gear, and the moisture adsorbing material  41   a  is fitted to an inner periphery of the external gear. Thus, the moisture adsorbing material  41   a  and the ring gear  41   b  are integrated. The moisture adsorbing material  41   a  and the ring gear  41   b  are disposed on the support frame  41   d , and are rotatably supported with respect to the support frame  41   d  about a center axis C of the moisture adsorbing material  41   a . The support frame  41   d  is fixed to the partition  61  of the casing body  50 . The support frame  41   d  is provided with a through hole  41   f.    
     The pinion gear  41   c  is rotatably supported with respect to the support frame  41   d  on an outer periphery of the ring gear  41   b , and meshes with the ring gear  41   b . The pinion gear  41   c  is rotated by a motor (not illustrated). As a result, in response to the rotation of the pinion gear  41   c , the moisture adsorbing material  41   a  rotates about the center axis C together with the ring gear  41   b . In one or more embodiments, the moisture adsorbing material  41   a  rotates in one circumferential direction (a direction indicated by a white arrow in  FIG. 3 ). Of the moisture adsorbing rotor  41  in  FIG. 3 , only the moisture adsorbing material  41   a  is illustrated. 
     As illustrated in  FIGS. 3 and 4 , the support frame  41   d  of the moisture adsorbing rotor  41  is provided with a heater case  71  in the fifth space R 5 . The heater case  71  has a box shape and is disposed below the moisture adsorbing rotor  41 . An upper opening of the heater case  71  is covered and sealed with the support frame  41   d . The heater case  71  is disposed in a 240° angular range from the vertical plate  64   e  (vertical plate  63   c ) to the inclined plate  64   d  about the center axis C in plan view. 
     In the heater case  71 , the heater  42  is housed at a position below the inclined plate  63   b . In the second ventilation path P 2 , the heater  42  is disposed downstream of a third region A 3  (described later) and upstream of a second region A 2  (described later). In  FIG. 4 , the heater  42  is not illustrated. In the heater case  71 , a space formed closer to the inclined plate  64   d  than the heater  42  is a pre-heater space  71   a  into which air before being heated by the heater  42  is introduced. In the heater case  71 , a space formed closer to the vertical plate  64   e  than the heater  42  is a post-heater space  71   b  into which air after being heated by heater  42  is introduced. 
       FIG. 6  is a perspective view of the heater  42 . The heater  42  includes metal, for example, and has a quadrangular cross section. The heater  42  has a grid-like frame body  42   a  in order to increase a contact area with air passing through the inside thereof. One open end of the heater  42  is an inlet  42   b  for air, and the other open end of the heater  42  is an outlet  42   c  for air. 
     The heater  42  is disposed such that the inlet  42   b  faces the pre-heater space  71   a  and the outlet  42   c  faces the post-heater space  71   b . The air in the pre-heater space  71   a  is introduced to the heated inside of the heater  42  from the inlet  42   b , and is heated by being in contact with the frame body  42   a  and the like when passing through the inside of the heater  42 . The heated air moves from the outlet  42   c  of the heater  42  to the post-heater space  71   b , and heats the moisture adsorbing material  41   a  located above the post-heater space  71   b  (see  FIG. 3 ). 
     The heater  42  may directly heat the moisture adsorbing material  41   a  instead of heating the air. In this case, for example, the heater  42  may be disposed above the moisture adsorbing material  41   a , and the moisture adsorbing material  41   a  may be heated by radiant heat of the heater  42 . 
     As illustrated in  FIG. 3 , the moisture adsorbing rotor  41  is divided into a first region A 1 , the second region A 2 , and the third region A 3  in plan view. The first region A 1  is adjacent to the second region A 2  and the third region A 3 . The second region A 2  is adjacent to the first region A 1  and the third region A 3 . The third region A 3  is adjacent to the first region A 1  and the second region A 2 . The moisture adsorbing material  41   a  rotates from the first region A 1  toward the second region A 2 . Specifically, the moisture adsorbing material  41   a  rotates so as to pass through the first region A 1 , the second region A 2 , and the third region A 3  in that order and return to the first region A 1 . 
     The first region A 1  is formed in an angular range of 120° from the vertical plate  63   c  of the partition  63  to the inclined plate  64   d  of the partition  64 . As a result, the first region A 1  is interposed between the second space R 2  and the fourth space R 4 . When outdoor cold air is introduced into the second space R 2  from the air supply port  55 , part of the air passes through the moisture adsorbing material  41   a  in the first region A 1  and moves to the fourth space R 4 . At this time, the moisture adsorbing material  41   a  in the first region A 1  is cooled by the air to have a lower temperature, and thus adsorbs moisture in the air passing through the moisture adsorbing material  41   a . The moisture adsorbing material  41   a  in the first region A 1  rotates so as to move to the second region A 2  adjacent to the first region A 1  after adsorbing moisture in the air. 
     The second region A 2  is formed in an angular range of 120° from the vertical plate  63   c  of the partition  63  to the inclined plate  63   b  of the partition  63 . As a result, the second region A 2  is interposed between the second space R 2  and the post-heater space  71   b  of the heater case  71 . In the heater case  71 , the air heated by the heater  42  moves from the post-heater space  71   b  to the second space R 2  through the moisture adsorbing material  41   a  in the second region A 2 . At this time, the moisture adsorbing material  41   a  in the second region A 2  is heated by the air to have a higher temperature, and thud releases moisture to the air passing through the moisture adsorbing material  41   a.    
     The third region A 3  is formed in an angular range of 120° from the inclined plate  63   b  of the partition  63  to the inclined plate  64   d  of the partition  64 . As a result, the third region A 3  is interposed between the second space R 2  and the pre-heater space  71   a  of the heater case  71 . When outdoor cold air is introduced into the second space R 2  from the air supply port  55 , part of the air passes through the moisture adsorbing material  41   a  in the third region A 3  and moves to the pre-heater space  71   a . At this time, the moisture adsorbing material  41   a  in the third region A 3  is preliminarily cooled by the cold air. The cold air is preliminarily heated by the moisture adsorbing material  41   a . The third region A 3  is not necessarily formed in the moisture adsorbing rotor  41 . 
     &lt;Ventilation Path&gt; 
     As illustrated in  FIGS. 3 and 4 , when the first fan  43  is driven, outdoor air is introduced into the second space R 2  of the casing body  50  from the air supply port  55  of the air supply connection pipe  52 . The air introduced into the second space R 2  passes through the first region A 1  of the moisture adsorbing rotor  41 , moves to the fourth space R 4 , and is discharged to the outside from the exhaust port  56  of the exhaust connection pipe  53  by the first fan  43 . 
     Therefore, in one or more embodiments, an inner space of the air supply connection pipe  52 , the second space R 2 , the fourth space R 4 , and an inner space of the air exhaust connection pipe  53  constitute the first ventilation path P 1  through which air flows from the air supply port  55  to the exhaust port  56 . The first region A 1  of the moisture adsorbing rotor  41  and the first fan  43  are disposed in a midway of the first ventilation path P 1 . The moisture adsorbing material  41   a  of the moisture adsorbing rotor  41  adsorbs moisture in the air flowing through the first ventilation path P 1  in the first region A 1 . 
     When the second fan  44  is driven during the humidifying operation, the outdoor air is introduced into the second space R 2  of the casing body  50  from the air supply port  55  of the air supply connection pipe  52 , passes through the third region A 3  of the moisture adsorbing rotor  41 , and moves to the pre-heater space  71   a  of the heater case  71 . The air that has moved to the pre-heater space  71   a  is heated by the heater  42  in the heater case  71 , moves to the post-heater space  71   b , passes through the second region A 2  of the moisture adsorbing rotor  41 , and moves to the third space R 3 . The air that has moved to the third space R 3  passes through the release duct  59  by the second fan  44 , moves to the communication port  50   a , and is released from the release port  54  of the panel  51  to the target space S 1 . 
     Therefore, in one or more embodiments, the inner space of the air supply connection pipe  52 , the second space R 2 , the pre-heater space  71   a , the post-heater space  71   b , the third space R 3 , and an internal space of the release duct  59  constitute the second ventilation path P 2  through which air flows from the air supply port  55  to the communication port  50   a . The third region A 3  and the second region A 2  of the moisture adsorbing rotor  41 , the heater  42 , and the second fan  44  are disposed in a midway of the second ventilation path P 2 . 
     In the second ventilation path P 2 , the moisture adsorbing material  41   a  of the moisture adsorbing rotor  41  is preliminarily cooled when the air before being heated by the heater  42  in the third region A 3  passes through the moisture adsorbing material  41   a . The air heated by the heater  42  in the second region A 2  passes through the moisture adsorbing material  41   a , and thus the moisture adsorbing material  41   a  releases moisture into the air. As a result, the air passing through the moisture adsorbing material  41   a  in the second region A 2  is humidified. 
     During the humidifying operation, the air flowing through the first ventilation path P 1  and the air flowing through the second ventilation path P 2  both pass through the second space R 2  as an identical space, but a partition that distributes both air is not provided in the second space R 2 . The reason is as follows. As described above, the first fan  43  is driven with an air volume larger than an air volume of the second fan  44  to make a difference in air suction force between the first fan  43  and the second fan  44 . This is because the air is distributed to the first ventilation path P 1  and the second ventilation path P 2  due to the difference in suction force. 
     When the second fan  44  is driven during the ventilation operation, the outdoor air flows through the second ventilation path P 2  similarly to the humidifying operation. However, since the first fan  43 , the moisture adsorbing rotor  41 , and the heater  42  are not driven, the air flowing through the second ventilation path P 2  is released from the release port  54  of the panel  51  into the target space S 1  without being humidified by the moisture adsorbing material  41   a  of the moisture adsorbing rotor  41 . 
     The humidity control device disclosed in Patent Literature 1 has a heater as a heating source that needs periodical inspection. However, it may be difficult to inspect the heater because the humidity control device is installed in the attic. 
     One or more embodiments of the present disclosure provide a humidifying unit of which heater is easily inspected. 
     &lt;Functional Effects of Embodiments&gt; 
     In the humidifying unit  3  according to one or more embodiments, since the panel  51  of the casing  47  is exposed to the target space S 1 , the heater  42  in the casing  47  can be easily inspected by accessing the heater  42  from the target space S 1 . Further, since the panel  51  is detachably attached to the casing body  50 , detaching the panel  51  makes the heater  42  more accessible. This further facilitates the inspection of the heater  42 . 
     In the second ventilation path P 2 , since the heater  42  is disposed upstream of the second region A 2  of the moisture adsorbing rotor  41 , the heater  42  heats the air before humidification flowing through the second ventilation path P 2 . 
     When the air heated by the heater  42  passes through the moisture adsorbing material  41   a  in the second region A 2 , the moisture adsorbing material  41   a  is heated. This eliminates the need for directly heating the moisture adsorbing material  41   a  by the heater  42 , the heater  42  can be disposed away from the moisture adsorbing material  41   a , and a degree of freedom in arrangement of the heater  42  can be increased. 
     When the heater  42  directly heats the moisture adsorbing material  41   a , the moisture adsorbing material  41   a  can be efficiently heated. 
     The second ventilation path P 2  is formed in the third region A 3  of the moisture adsorbing rotor  41  so as to allow the air before being heated by the heater  42  to pass through the moisture adsorbing material  41   a . As a result, the moisture adsorbing material  41   a  can be preliminarily cooled by the air before being heated by the heater  42 . 
     The moisture adsorbing material  41   a  rotates from the first region A 1  toward the second region A 2 , the first region A 1  allowing the air flowing through the first ventilation path P 1  to pass through and adsorbing moisture from the air, the second region A 2  allowing the air flowing through the second ventilation path P 2  to pass through and releasing the moisture to the air. By rotating one moisture adsorbing material  41   a  in this manner, it is possible to adsorb moisture in the air flowing through the first ventilation path P 1  in the first region A 1  and humidify the air flowing through the second ventilation path P 2  in the second region A 2 . Therefore, the humidifying unit  3  can be made compact. 
     The outdoor air introduced into the first ventilation path P 1  from the air supply duct  48  is deprived of moisture by the moisture adsorbing material  41   a , and the air deprived of the moisture passes through the exhaust duct  49  and is discharged to the outside. As a result, the air deprived of moisture is not released to the target space S 1 , and the target space S 1  can be efficiently humidified. 
     The outdoor air introduced into the second ventilation path P 2  from the air supply duct  48  is humidified by the moisture adsorbing material  41   a , and the humidified air is released from the release port  54  of the casing  47  to the target space  51 . Thus, the target space S 1  can be humidified. 
     The air supply duct  48  also serves as the first air supply duct that introduces outdoor air into the first ventilation path P 1  and the second air supply duct that introduces outdoor air into the second ventilation path P 2 . As a result, the humidifying unit  3  does not need to separately include the second air supply duct, and this can simplify the configuration of the humidifying unit  3 . 
     Since the air humidified in the second ventilation path P 2  of the casing  47  is released to the entire target space  51  from the release port  54  as an opening formed in the panel  51 , a flap that adjusts the wind direction becomes unnecessary. This can further simplify the configuration of the humidifying unit  3 . 
     Air is introduced into the first ventilation path P 1  and the second ventilation path P 2  of the casing  47  from the common air supply port  55 . At this time, an air volume difference occurs between the first fan  43  and the second fan  44  provided in the ventilation path P 1  and the ventilation path P 2 , respectively. It is therefore possible to distribute the air flow from the air supply port  55  to the exhaust port  56  via the first ventilation path P 1  and the air flow from the air supply port  55  to the release port  54  via the second ventilation path P 2 . This eliminates the need for a partition that distributes air from the air supply port  55  to the first ventilation path P 1  and the second ventilation path P 2  and further simplifies the configuration of the humidifying unit  3 . 
     The humidifying unit  3 , which includes the humidity sensor  45  detecting a humidity of the target space S 1 , can be operated on the basis of the detection value of the humidity sensor  45 . As a result, the humidity of the target space S 1  can be adjusted to a humidity desired by a user. 
     &lt;Modification&gt; 
       FIG. 7  is a schematic diagram illustrating a modification of an air supply structure in the humidifying unit  3 . The air supply structure of the modification includes an air supply path dedicated to the first ventilation path P 1  and an air supply path dedicated to the second ventilation path P 2 . Specifically, the humidifying unit  3  includes a first air supply connection pipe  52 A, a second air supply connection pipe  52 B, a first air supply duct  48 A, and a second air supply duct  48 B. In other words, in the embodiments described above, the first air supply duct  48 A is integrated with the second air supply duct  48 B and the air supply ducts  48 A and  48 B from a single air supply duct  48 . 
     One end of the first air supply connection pipe  52 A and one end of the second air supply connection pipe  52 B are disposed in the casing body  50 . An opening at the other end of the first air supply connection pipe  52 A serves as a first air supply port  55 A that sucks outdoor air into the first ventilation path P 1 . An opening at the other end of the second air supply connection pipe  52 B serves as a second air supply port  55 B that sucks outdoor air into the second ventilation path P 2 . 
     The first air supply duct  48 A is an air supply duct that introduces outdoor air into the first ventilation path P 1 . One end of the first air supply duct  48 A is connected to the first air supply connection pipe  52 A, and the other end of the first air supply duct  48 A penetrates the side wall  5  and communicates with the outside. 
     The second air supply duct  48 B is an air supply duct that introduces outdoor air into the second ventilation path P 2 . One end of the second air supply duct  48 B is connected to the second air supply connection pipe  52 B, and the other end of the second air supply duct  48 B penetrates the side wall  5  and communicates with the outside. 
     &lt;Other Modifications&gt; 
     The present disclosure should not be limited to the above exemplification, but is intended to include any modification recited in claims within meanings and a scope equivalent to those of the claims. 
     In one or more embodiments, the entire panel  51  of the casing  47  is exposed to the target space S 1 , but the disclosure is not limited thereto. For example, the casing body  50  and the panel  51  of the casing  47  may be disposed in the attic space S 2 , and only the release port  54  of the panel  51  may be exposed to the target space  51 . When the casing  47  is disposed outside the side wall  5 , a part of the casing body  50  may be exposed to the target space S 1 . 
     In the moisture adsorbing rotor  41  according to one or more embodiments, the moisture adsorbing material  41   a  is rotated by a gear mechanism including the ring gear  41   b  and the pinion gear  41   c , but the moisture adsorbing material  41   a  may be rotated by another rotation transmission mechanism such as a belt. Although the moisture adsorbing material  41   a  is rotated, the moisture adsorbing material  41   a  may be used without being rotated. 
     In the above-described embodiments, the humidity sensor  45  is provided in the humidifying unit  3 , but may be provided at a location other than the humidifying unit  3 , for example, on a wall surface of the side wall  5  facing the target space S 1 . 
     Although the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments may be devised without departing from the scope of the present disclosure. Accordingly, the scope of the disclosure should be limited only by the attached claims. 
     REFERENCE SIGNS LIST 
     
         
         
           
               3  humidifying unit 
               7  control unit 
               14  temperature sensor 
               41   a  moisture adsorbing material 
               42  heater 
               45  humidity sensor 
               47  casing 
               48  air supply duct (first air supply duct, second air supply duct) 
               49  exhaust duct 
               54  release port (opening) 
             A 1  first region 
             A 2  second region 
             P 1  first ventilation path 
             P 2  second ventilation path 
             S 1  target space