Air supply system

Abstract

The blower system (1000) is provided with: a suction port (150) disposed on the front side surface of a liner (100) disposed along the wall surface (22) of the toilet (10) and having the toilet (200) disposed on the front side; a delivery fan (152) disposed inside the liner (100); and a blow-out opening (154) disposed on the upper surface of the liner (100). By means of the rotation of the delivery fan (152), the air in the toilet (10) is sucked into the interior of the liner (100) from the suction inlet (150), the air sucked into the interior of the liner (100) is blown out from the blow-out opening (154), and the air blown out from the blow-out opening (154) rises along the wall surface (22) and is sucked into a ventilation opening (310) provided on the ceiling surface (24) of the toilet (10).

Description

Technical Field

[0001] The invention relates to an air supply system. Background Art

[0002] Existing men's toilets are equipped with ventilation fans, and the air in the men's toilets is discharged to the outside through the ventilation fans. However, if only ventilation fans are provided, the odor of feces diffused into the air cannot be fully discharged to the outside. Therefore, for example, an air suction hole is provided on the inner side of the uppermost part of the toilet, and a pipe for quickly sucking the odor is provided, and the odor is released to the outside through the suction fan (for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-127173 Summary of the invention

[0006] However, according to Patent Document 1, since each toilet is connected to a pipe, the structure becomes more complicated as the number of toilets installed in the bathroom increases.

[0007] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a technology for effectively exhausting the air in a toilet to the outside while suppressing the complexity of the structure.

[0008] An air supply system according to one embodiment of the present invention includes: an inlet, which is arranged on the front side of a liner, the liner being arranged along the wall surface of a toilet and having a toilet bowl arranged on the front side; a delivery fan, which is arranged inside the liner; and an outlet, which is arranged on the upper side of the liner. The air supply system draws the air in the toilet from the inlet into the interior of the liner through the rotation of the delivery fan, and the air drawn into the interior of the liner is blown out from the outlet, and the air blown out from the outlet rises along the wall surface and is drawn into the ventilation port provided on the ceiling surface of the toilet.

[0009] In addition, arbitrarily combining the above-mentioned constituent elements and converting the expression of the present invention into various expressions suitable for methods, apparatuses, systems, recording media, computer programs, etc. are also effective as aspects of the present invention.

[0010] According to the present invention, the air in the toilet can be efficiently discharged to the outside while suppressing the complexity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1A It is a perspective view showing the structure of the air supply system according to the first embodiment of the present invention.

[0012] Figure 1BIt is a perspective view showing the structure of the air supply system according to the first embodiment of the present invention.

[0013] Figure 1C It is a side view showing the structure of the air supply system according to the first embodiment of the present invention.

[0014] Figure 1D It is a diagram showing a cross-sectional structure of an air supply system according to Example 1 of the present invention.

[0015] Figure 2A It is a perspective view showing the structure of the air supply system according to the second embodiment of the present invention.

[0016] Figure 2B It is a side view showing the structure of the air supply system according to the second embodiment of the present invention.

[0017] Figure 3A It is a perspective view showing the structure of the air supply system according to the third embodiment of the present invention.

[0018] Figure 3B It is a side view showing the structure of the air supply system according to the third embodiment of the present invention.

[0019] Figure 4A It is a perspective view showing the structure of the air supply system according to the fourth embodiment of the present invention.

[0020] Figure 4B It is a perspective view showing the structure of the air supply system according to the fourth embodiment of the present invention.

[0021] Figure 5 It is a three-dimensional diagram showing the structure of the air supply system of Example 5 of the present invention.

[0022] Description of Reference Numerals

[0023] 10. Toilet

[0024] 12 In the ceiling

[0025] 20 Ground

[0026] 21 Side

[0027] 22 wall

[0028] 24 Ceiling surface

[0029] 100 Lining

[0030] 101 Right side

[0031] 102 Hollow Space

[0032] 110 front side

[0033] 120 upper side

[0034] 150 suction port

[0035] 152 conveying fan

[0036] 154 Blowing outlet

[0037] 200, 200a, 200b, 200c toilet

[0038] 300 exhaust pipe

[0039] 302 Ventilation Device

[0040] 304 Ceiling Surface Pipe

[0041] 306 Wall Pipe

[0042] 310 Ventilation port

[0043] 320 prevent wall

[0044] 320a The first prevention wall

[0045] 320b Second prevention wall

[0046] 1000~1004 air supply system DETAILED DESCRIPTION

[0047] Each embodiment described below represents a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, the configuration positions and connection modes of the constituent elements, and the order of the steps (processes) and steps shown in the following embodiments are only examples and do not limit the present invention. Therefore, among the constituent elements in the following embodiments, the constituent elements not recorded in the independent claims representing the highest concept of the present invention are described as arbitrary constituent elements. In addition, in each of the accompanying drawings, the same symbols are marked for the actually identical constituent elements, and repeated descriptions are omitted or simplified.

[0048] (Example 1)

[0049] Example 1 is described

[0050] Figure 1A to Figure 1D It is a diagram showing the structure of the air supply system 1000. Figure 1A This is a three-dimensional view of the toilet 10 as viewed from above. Figure 1B This is a three-dimensional view of the toilet 10 as viewed from below. Figure 1C is a side view of the bathroom 10 .

[0051] The floor 20 is disposed at the lower side of the bathroom 10, the wall 22 is disposed at one of the four side surfaces of the bathroom 10, and the ceiling 24 is disposed at the upper side of the bathroom 10. In this way, the bathroom 10 is a space surrounded by the floor 20, the four side surfaces (including the wall 22), and the ceiling 24. Figure 1A to Figure 1C In the figure, only the left side surface 21 and the inner side surface, that is, the wall surface 22, are shown among the four side surfaces, and the other two side surfaces are omitted.

[0052] The liner 100 is provided along the wall 22 of the toilet 10. The liner 100 has a box-shaped hollow structure by the combination of the wall 22 and the floor 20. The liner 100 includes: a front side surface 110 provided in parallel with the wall 22 on the front side of the wall 22; and an upper side surface 120 provided in parallel with the floor 20 on the upper side of the floor 20. The front side surface 110 and the upper side surface 120 are connected to each other at a right angle at the corner of the front upper part of the liner 100.

[0053] In addition, the liner 100 includes a right side 101 and a left side (not shown). The right side 101 connects the right side of the front side 110 and the wall 22, and the left side connects the left side of the front side 110 and the wall 22. In addition, the liner 100 does not include the right side 101 and the left side, and the left and right sides of the front side 110 of the liner 100 can also be directly connected to the left side 21 and the right side (not shown) of the toilet 10, respectively.

[0054] One or more (three in this example) toilets 200a to 200c are provided on the front side 110 of the liner 100. The toilets 200a to 200c are, for example, urinals, but may also be toilets. Therefore, the liner 100 has a support mechanism (not shown) for supporting one or more toilets 200a to 200c. In addition, a water supply pipe and a drainage pipe connected to each toilet 200a to 200c are stored inside the liner 100.

[0055] Figure 1D Indicates from Figure 1C A cross-sectional view of the liner 100 observed in the same direction (side). The liner 100 has a hollow space 102 surrounded by the floor 20, the wall 22, the front side 110, the right side 101, the left side, and the upper side 120. The hollow space 102 corresponds to the interior of the liner 100. A suction port 150 that passes through the toilet 10 and the hollow space 102 is arranged on the lower side of the front side 110. In addition, a conveying fan 152 is arranged on the upper side of the hollow space 102. In this example, the suction port 150 is arranged at a position lower than the toilet 200a~200c of the front side 110, and has a slit shape extending in the direction of the wall 22 (left-right direction). The slit shape has a length that is approximately the same as the width of the front side 110 of the liner 100 in the left-right direction.

[0056] In addition, a slit-shaped blowout port 154 extending in the left-right direction along the wall surface 22 is arranged on the wall surface 22 side of the upper side surface 120. The blowout port 154 also penetrates between the toilet 10 and the hollow space 102. In this example, the slit shape of the blowout port 154 has a length that is substantially the same as the width of the upper side surface 120 of the liner 100 in the left-right direction.

[0057] return Figure 1A to Figure 1C An exhaust duct 300 extending to the outside is arranged in the ceiling 12 of the bathroom 10. The exhaust duct 300 is connected to a ventilator 302 with a built-in fan provided in the ceiling 12 of the bathroom 10. The lower part of the ventilator 302 is connected to a ceiling duct 304 provided on the ceiling surface 24.

[0058] The ceiling duct 304 extends toward the wall surface 22 in the ceiling surface 24. The end of the ceiling duct 304 on the wall surface 22 side is connected to a wall duct 306 provided on the wall surface 22. The wall duct 306 extends along the wall surface 22 in the left-right direction ( Figure 1A This is equivalent to the wall duct 306 extending in the direction (left-right direction) in which the blowing outlet 154 extends. A slit-shaped ventilation port 310 extending in the left-right direction is arranged on the lower side portion of the wall duct 306. The ventilation port 310 of this structure can be said to be arranged on the ceiling surface 24. In this example, the slit shape of the ventilation port 310 has a length that is approximately the same as the width of the wall duct 306 in the left-right direction, and has a length that is approximately the same as the length of the blowing outlet 154 in the left-right direction.

[0059] Since the exhaust duct 300 , the ventilation device 302 , the ceiling duct 304 , and the wall duct 306 all have hollow structures, these hollow spaces are connected to the bathroom 10 via the ventilation port 310 .

[0060] Here, the ventilation port 310 is aligned with the wall surface 22 in the front-rear direction ( Figure 1A When the distance in the direction indicated by Y in the figure is set as the "first distance" and the distance in the front-back direction between the portion of the toilet 200a-200c farthest from the wall 22 and the wall 22 is set as the "second distance", the first distance is shorter than the second distance. By adopting such a structure, the air rising along the wall 22 is easily sucked into the ventilation port 310.

[0061] In such an air supply system 1000, the air of the toilet 10 is sucked into the liner 100 from the suction port 150 by the rotation of the delivery fan 152 inside the liner 100. In addition, the air sucked into the liner 100 is blown out from the blowout port 154 by the rotation of the delivery fan 152 and rises along the wall surface 22. The air rising along the wall surface 22 is sucked into the ventilation port 310 by the rotation of the fan in the ventilation device 302, and is discharged to the outside through the wall surface duct 306, the ceiling surface duct 304, and the exhaust duct 300.

[0062] In the above structure, the liner 100, the suction port 150, the delivery fan 152, the blow-out port 154, and the ventilation port 310 are included in the air supply system 1000. The ceiling duct 304 and the wall duct 306 may also be included in the air supply system 1000.

[0063] According to this embodiment, the air of the bathroom 10 is sucked in from the suction port 150 arranged on the front side 110 of the liner 100, and is blown out from the blowing port 154 arranged on the upper side 120 of the liner 100 in a manner such that the air rises along the wall surface 22 and is sucked into the ventilation port 310, thereby suppressing the complexity of the structure and effectively exhausting the air of the bathroom 10 to the outside.

[0064] Furthermore, since blowout port 154 has a slit shape extending in one direction and ventilation port 310 has a slit shape extending in the direction in which the slit shape of blowout port 154 extends, air blown out from blowout port 154 can be efficiently sucked into ventilation port 310 .

[0065] An overview of one embodiment of the present invention is as follows.

[0066] (Item 1)

[0067] An air supply system (1000) comprises: an inner liner (100) arranged along a wall surface (22) of a bathroom (10) and having a toilet (200a-200c) arranged at the front side;

[0068] A suction port (150) disposed on the front side (110) of the liner (100);

[0069] a conveying fan (152) disposed inside the liner (100);

[0070] a blow-out port (154) disposed on the upper side (120) of the liner (100); and

[0071] A ventilation port (310) is provided on the ceiling surface (24) of the bathroom (10).

[0072] The conveying fan (152) rotates so that the air of the bathroom (10) is sucked into the interior of the lining (100) from the suction port (150), and the air sucked into the interior of the lining (100) is blown out from the blowing port (154). The air blown out from the blowing port (154) rises along the wall surface (22) and is sucked into the ventilation port (310) provided on the ceiling surface (24) of the bathroom (10).

[0073] (Item 2)

[0074] The air supply system (1000) according to item 1, wherein the blowing outlet (154) has a slit shape extending along the wall surface (22),

[0075] The ventilation port (310) has a slit shape extending in the direction in which the slit shape of the blow-out port (154) extends.

[0076] A first distance between the ventilation port (310) and the wall surface (22) is shorter than a second distance between a portion of the toilet (200a-200c) farthest from the wall surface (22) and the wall surface (22).

[0077] (Item 3)

[0078] The air supply system (1000) as described in Item 2, wherein the ventilation port (310) is arranged on the wall (22) and is arranged at the lower part of the wall duct (306) extending in the direction in which the blowing port (154) extends.

[0079] (Example 2)

[0080] Next, Example 2 is described.

[0081] The air supply system 1001 of the second embodiment has the same structure as the air supply system 1000 of the first embodiment, but the structure of the ventilation port 310 is different from that of the first embodiment. The following description will focus on the differences from the first embodiment.

[0082] Figure 2A and 2B It is a diagram showing the structure of the air supply system 1001. Figure 2A This is a three-dimensional view of the toilet 10 as viewed from below. Figure 2B is a side view of the bathroom 10, respectively Figure 1A and Figure 1C The liner 100 , the exhaust duct 300 , and the ventilation device 302 in the second embodiment have the same structure as those in the first embodiment.

[0083] In the present embodiment, the lower portion of the ventilation device 302 is connected to a ceiling duct 304 provided on the ceiling surface 24. The ceiling duct 304 protrudes downward from the ceiling surface 24 and extends in the direction (left-right direction) in which the blow-out port 154 extends. A slit-shaped ventilation port 310 extending in the left-right direction is arranged at the lower portion of the ceiling duct 304. In the present embodiment, the slit shape of the ventilation port 310 has a length that is the same as the left-right width of the lower portion of the ceiling duct 304.

[0084] As described above, when the distance between the ventilation port 310 and the wall surface 22 in the front-to-back direction is set as the "first distance" and the distance between the portion of the toilet 200a to 200c farthest from the wall surface 22 and the wall surface 22 in the front-to-back direction is set as the "second distance", in this embodiment, the first distance is longer than the second distance. With such a structure, the air rising from the blower port 154 along the wall surface 22 is sucked into the ventilation port 310 along the ceiling surface 24 toward the ceiling surface duct 304.

[0085] In the above structure, the air inlet 150, the conveying fan 152, the air outlet 154, and the ventilation port 310 are included in the air supply system 1001. The ceiling duct 304 may also be included in the air supply system 1001.

[0086] According to the present embodiment, since ventilation port 310 is arranged at the lower portion of ceiling duct 304 that protrudes downward from ceiling 24 and extends in the direction in which outlet 154 extends, air blown out from outlet 154 can be efficiently sucked into ventilation port 310 .

[0087] An overview of one embodiment of the present invention is as follows.

[0088] (Item 4)

[0089] The air supply system (1000) according to item 1, wherein the blowing outlet (154) has a slit shape extending along the wall surface (22),

[0090] A first distance between the ventilation port (310) and the wall surface (22) is longer than a second distance between the portion of the toilet (200a-200c) farthest from the wall surface (22) and the wall surface (22).

[0091] The ventilation port (310) is arranged at a lower portion of a ceiling duct (304) that protrudes downward from the ceiling surface (24) and extends in a direction in which the blowout port (154) extends.

[0092] (Example 3)

[0093] Next, Example 3 is described.

[0094] The air supply system 1002 of the third embodiment has the same structure as the air supply systems 1000 and 1001 of the first and second embodiments, but the structure of the ventilation port 310 is different from that of the first and second embodiments. The following description will focus on the differences from the first and second embodiments.

[0095] Figure 3A and 3B It is a diagram showing the structure of the air supply system 1002. Figure 3A This is a three-dimensional view of the toilet 10 as viewed from below. Figure 3B is a side view of the bathroom 10, respectively Figure 1B and Figure 1C The liner 100 , the exhaust duct 300 , and the ventilation device 302 in the third embodiment have the same structure as those in the first embodiment.

[0096] The lower side portion of the ventilation device 302 is open to the ceiling surface 24, and the open portion is a ventilation port 310 ( Figure 3B ). Therefore, in the third embodiment, the ceiling surface duct 304 and the wall surface duct 306 described in the first and second embodiments are not provided.

[0097] In addition, a prevention wall 320 is provided on the ceiling surface 24 at a position farther from the wall surface 22 in the front-to-back direction than the ventilation port 310. The prevention wall 320 has a shape protruding downward from the ceiling surface 24, and extends in the direction (left-right direction) in which the blow-out port 154 extends. In this example, the prevention wall 320 has a length that is the same as the width of the bathroom 10 in the left-right direction. With such a structure, the air rising from the blow-out port 154 along the wall surface 22 leaves the wall surface 22 along the ceiling surface 24. A portion of the air leaving the wall surface 22 is sucked into the ventilation port 310, but the rest of the air is away from the ventilation port 310. The air away from the ventilation port 310 from the wall surface 22 is reflected back to the ventilation port 310 by the prevention wall 320 and is sucked into the ventilation port 310.

[0098] In the above configuration, the air inlet 150, the transport fan 152, the air outlet 154, and the ventilation port 310 are included in the air supply system 1002. The prevention wall 320 may also be included in the air supply system 1002.

[0099] According to this embodiment, since a prevention wall 320 protruding downward from the ceiling surface 24 and extending in the direction (left-right direction) in which the blow-out port 154 extends is provided at a position farther away from the wall surface 22 in the front-to-back direction than the ventilation port 310, the air blown out from the blow-out port 154 can be effectively sucked into the ventilation port 310.

[0100] An overview of one embodiment of the present invention is as follows.

[0101] (Item 5)

[0102] The air supply system (1002) according to item 1, further comprising a prevention wall (320) protruding downward from the ceiling surface (24),

[0103] The blowing outlet (154) has a slit shape extending along the wall surface (22).

[0104] The preventing wall (320) extends along the extending direction of the blowing outlet (154).

[0105] The prevention wall (320) is disposed at a position farther from the wall surface (22) than the ventilation port (310).

[0106] (Example 4)

[0107] Next, Example 4 is described.

[0108] The structure of the air supply system 1003 of the fourth embodiment is the same as the air supply systems 1000 to 1002 of the first to third embodiments, but the structures of the blow-out port 154 and the ventilation port 310 are different from those of the first to third embodiments. The following description will focus on the differences between the first to third embodiments.

[0109] Figure 4A and 4B It is a diagram showing the structure of the air supply system 1003. Figure 4A This is a three-dimensional view of the toilet 10 as viewed from above. Figure 4B is a three-dimensional diagram observed from below the toilet 10, respectively Figure 1A and Figure 1B The exhaust duct 300 and the ventilation device 302 in the fourth embodiment have the same structure as those in the first embodiment.

[0110] The lower part of the ventilation device 302 opens to the ceiling surface 24 as in the third embodiment, and the opened part is the ventilation port 310. In addition, the length of the blowing port 154 in the liner 100 in the direction extending along the wall surface 22 (left-right direction) is shorter than the length of the blowing port 154 in the first embodiment in the same direction. For example, the length of the blowing port 154 is the same as the length of the ventilation port 310 in the same direction ( Figure 4A ).

[0111] In this embodiment, the first prevention wall 320a and the second prevention wall 320b are provided on the ceiling surface 24. The first prevention wall 320a and the second prevention wall 320b extend in a direction different from the direction along the wall surface 22 (left-right direction), for example, in a direction perpendicular to the direction along the wall surface 22 (front-back direction).

[0112] For example, the first prevention wall 320a and the second prevention wall 320b extend from the wall surface 22 to a position of the ventilation port 310 beyond the end away from the wall surface 22. The first prevention wall 320a and the second prevention wall 320b are provided in parallel with the ventilation port 310 in the direction along the wall surface 22 (left-right direction).

[0113] The interval between the first and second prevention walls 320a and 320b in the horizontal direction is set to be greater than the horizontal length of the air outlet 154 extending along the wall surface 22. The first and second prevention walls 320a and 320b each have a shape protruding downward from the ceiling surface 24.

[0114] With such a structure, the air rising from the outlet 154 along the wall surface 22 leaves the wall surface 22 and is sucked into the ventilation port 310 along the ceiling surface 24. At this time, the diffusion of the air along the wall surface 22 (left-right direction) is suppressed by the first prevention wall 320a and the second prevention wall 320b.

[0115] In the above configuration, the air inlet 150, the transport fan 152, the air outlet 154, and the ventilation port 310 are included in the air supply system 1003. The first prevention wall 320a and the second prevention wall 320b may also be included in the air supply system 1000.

[0116] According to the present embodiment, since the first prevention wall 320 a and the second prevention wall 320 b are provided across the ventilation port 310 in the direction along the wall surface 22 (left-right direction), the air blown out from the blowout port 154 can be efficiently sucked into the ventilation port 310 .

[0117] An overview of one embodiment of the present invention is as follows.

[0118] (Item 6)

[0119] The air supply system (1003) according to item 1, further comprising a first prevention wall (320a) and a second prevention wall (320b) protruding downward from the ceiling surface (24),

[0120] The first prevention wall (320a) and the second prevention wall (320b) extend in directions different from the direction along the wall surface (22).

[0121] The first prevention wall (320a) and the second prevention wall (320b) are arranged across the ventilation port (310) in a direction along the wall surface (22).

[0122] (Item 7)

[0123] The air supply system (1003) according to item 6, wherein the interval between the first prevention wall (320a) and the second prevention wall (320b) along the direction of the wall surface (22) is set to be greater than the length of the blowing outlet (154) in the direction.

[0124] The ventilation port (310) is a portion of the lower side of the ventilation device (302) that opens on the ceiling surface (24).

[0125] (Example 5)

[0126] Next, Example 5 is described.

[0127] The structure of the air supply system 1004 of the fifth embodiment is the same as the air supply systems 1000 to 1003 of the first to fourth embodiments, but the structure of the air inlet 150 is different from that of the first to fourth embodiments. The following description will focus on the differences between the first to fourth embodiments.

[0128] Figure 5 It is a perspective view showing the structure of the air supply system 1004.

[0129] The suction port 150 of the first to fourth embodiments is disposed at the lower side of the toilet bowls 200a to 200c on the front side 110. Figure 5 As shown, the suction port 150 of the fifth embodiment is also arranged at a position other than the lower side of the toilet bowl 200 on the front side surface 110 .

[0130] In this embodiment, the suction port 150 is formed on the front side 110 so as to surround the toilet 200. The gaps of the upper and lower suction ports 150 facing the toilet 200 are arranged in the left-right direction, and the gaps of the left and right suction ports 150 facing the toilet 200 are arranged in the up-down direction.

[0131] In addition, these suction ports 150 may be arranged at a lower side than a transport fan 152 (not shown) inside the liner 100 .

[0132] According to the present embodiment, since the air inlet 150 is disposed at a position other than the lower side of the front side surface 110 , the degree of freedom of the structure can be increased.

[0133] An overview of one embodiment of the present invention is as follows.

[0134] (Item 8)

[0135] The air supply system (1004) as described in item 1, wherein the suction port (150) is arranged on the front side (110) of the liner (100) so as to surround the toilet (200).

[0136] (Item 9)

[0137] The air supply system (1004) as described in Item 8, wherein the suction port (150) is arranged on the lower side of the conveying fan (152) inside the liner (100).

[0138] The present invention has been described above based on the embodiments. Those skilled in the art should understand that the embodiments are exemplary and that the combinations of the constituent elements or the processing flows may have various modifications, and these modifications are also within the scope of the present invention.

Claims

1. An air supply system, characterized in that: include: A suction port is arranged on the front side of the liner, the liner is arranged along the wall of the toilet and a toilet is arranged on the front side of the liner; a conveying fan disposed inside the liner; and a blow-out port, which is arranged on the upper side of the liner, Through the rotation of the conveying fan, the air of the bathroom is sucked into the interior of the liner from the suction port, and the air sucked into the interior of the liner is blown out from the blowing port. The air blown out from the blowing port rises along the wall surface and is sucked into the ventilation port set on the ceiling surface of the bathroom.

2. The air supply system according to claim 1, characterized in that: The blowing outlet has a slit shape extending along the wall surface, The ventilation port has a slit shape extending in the direction in which the blowout port extends, A first distance between the ventilation port and the wall surface is shorter than a second distance between a portion of the toilet bowl farthest from the wall surface and the wall surface.

3. The air supply system according to claim 2, characterized in that: The ventilation port is disposed on the wall surface and is disposed at a lower portion of a wall surface duct extending in a direction in which the blowout port extends.

4. The air supply system according to claim 1, characterized in that: The blowing outlet has a slit shape extending along the wall surface, A first distance between the ventilation port and the wall surface is longer than a second distance between a portion of the toilet farthest from the wall surface and the wall surface. The ventilation port is disposed at a lower portion of a ceiling surface duct that protrudes downward from the ceiling surface and extends in a direction in which the air outlet extends.

5. The air supply system according to claim 1, characterized in that: Also includes a prevention wall protruding downward from the ceiling surface, The blowing outlet has a slit shape extending along the wall surface, The prevention wall extends in the direction in which the blow-out port extends, The prevention wall is provided at a position farther from the wall surface than the ventilation port.

6. The air supply system according to claim 1, characterized in that: It also includes a first prevention wall and a second prevention wall protruding downward from the ceiling surface, The first prevention wall and the second prevention wall extend in directions different from the direction along the wall surface, respectively. The first prevention wall and the second prevention wall are provided across the ventilation port in a direction along the wall surface.

7. The air supply system according to claim 6, characterized in that: The distance between the first prevention wall and the second prevention wall in the direction of the wall surface is set to be greater than the length of the blowout port in the direction. The ventilation port is a portion where the lower side portion of the ventilation device opens on the ceiling surface.

8. The air supply system according to claim 1, characterized in that: The suction port is arranged on the front side of the liner so as to surround the toilet bowl.

9. The air supply system according to claim 8, characterized in that: The suction port is arranged below the transport fan in the liner.

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