Air blowing system

Abstract

To improve exhaust efficiency of a toilet space.SOLUTION: In an air blowing system 1 installed in a lining 3 provided in a space 10 having a toilet bowl 20, the space 10 communicates with an exhaust port 16 and the lining 3 includes a front face cover 3a and an upper face cover 3b. In the lining 3, a pipe 21a and / or a pipe 21b in which water flows are provided. The air blowing system 1 includes a suction port 2, an opening 6, and a first blower 7. The suction port 2 is provided on the front face cover 3a, the opening 6 is provided in the lining 3, and the first blower 7 is provided at the suction port 2. Air suctioned from the suction port 2 by the first blower 7 is blown to the outside of the lining 3 from the opening 6 through the inside of the lining 3. A part and an entire part of air blown to the outside of the lining 3 from the opening 6 is discharged to the outside of the space 10 through the exhaust port 16.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a ventilation system. [Background technology]

[0002] In order to efficiently ventilate the toilet room, an air intake is provided in the lower part of the toilet room and is connected to a forced exhaust path through an exhaust space. With this configuration, air in the toilet room is drawn into the exhaust space through the air intake, and the drawn air is then exhausted through the forced exhaust path (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-096855 Summary of the Invention [Problem to be solved by the invention]

[0004] A hole is provided in the wall of the toilet space, and a pipe is passed through this hole to supply water to the toilet bowl or drain water from the toilet bowl. There is often a gap between this hole and the pipe.

[0005] Generally, in a toilet space, the pipes through which water flows are covered with a lining.

[0006] When the forced exhaust path of a conventional toilet is installed inside the lining, airflow through gaps can occur from the holes used to pass the piping.

[0007] If such a gap air current occurs, the amount of air that should be exhausted from the toilet space through the forced exhaust path will decrease.

[0008] As a result, there is a risk that the toilet space may not be sufficiently ventilated.

[0009] Therefore, the present disclosure was conceived in response to the above-mentioned conventional problems, and aims to improve the exhaust efficiency of spaces such as toilets. [Means for solving the problem]

[0010] To achieve this objective, one embodiment of the present disclosure provides an air blowing system that is applied to a lining provided in a space having a toilet bowl, the space being connected to an exhaust port, the lining including a front cover and a top cover, piping through which water flows being provided inside the lining, the air blowing system including an intake port, an opening, and a first blower, the intake port being provided in the front cover, the opening being provided in the lining, the first blower being provided in the intake port, air sucked in from the intake port by the first blower being blown out of the lining through the opening through the inside of the lining, and some or all of the air blown out of the lining from the opening being discharged out of the space through the exhaust port. [Effects of the Invention]

[0011] According to the present disclosure, the exhaust efficiency of spaces such as toilets can be improved. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view including a configuration of a blower system according to a first embodiment of the present invention; [Figure 2] FIG. 10 is a front view showing the configuration of the air blowing system. [Figure 3] FIG. 10 is a cross-sectional perspective view showing the configuration of the air blowing system. [Figure 4] FIG. 10 is a cross-sectional view showing the air flow of the ventilation system. [Figure 5] FIG. 10 is a cross-sectional perspective view showing the air flow of the ventilation system. [Figure 6] FIG. 10 is a perspective view including the configuration of a blower system according to a second embodiment of the present invention. [Figure 7] FIG. 1 is a perspective view showing the configuration of the air blowing system; [Figure 8] FIG. 10 is a cross-sectional perspective view showing the configuration of the air blowing system. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0014] In each figure, the X-axis and Y-axis are axes that are perpendicular to each other on a horizontal plane. The Z-axis is an axis that is perpendicular to the horizontal plane. On the Z-axis, the positive direction represents a vertically upward direction, and the negative direction represents a vertically downward direction. In other words, when viewing the ventilation system 1 from the front, the right direction is the positive x-axis direction, the left direction is the negative x-axis direction, the upward direction is the positive z-axis direction, the downward direction is the negative z-axis direction, the forward direction is the positive y-axis direction, and the backward direction is the negative y-axis direction.

[0015] Example 1 As shown in FIGS. 1, 2, and 3, the air blowing system 1 has an air inlet 2, an opening 6 (FIG. 2), and a first air blower 7 (FIG. 3).

[0016] The suction port 2 is provided in the front cover 3a of the lining 3. The suction port 2 is preferably located below the midpoint between the upper and lower ends of the front cover 3a. This is because the suction port 2 is more easily able to suck in air above the floor 14 when it is located closer to the floor 14.

[0017] The lining 3 is for housing the pipe 21a and / or the pipe 21b.

[0018] Inside the lining 3, a pipe 21a and / or a pipe 21b is provided.

[0019] The pipe 21a is a water supply pipe for supplying water to the toilet bowl 20.

[0020] The pipe 21b is a drain pipe for discharging water that has flowed through the toilet bowl 20.

[0021] The toilet bowl 20 is disposed in the space 10. The toilet bowl 20 is assumed to be a urinal, but may also be a toilet bowl.

[0022] The space 10 is formed so as to be surrounded by a first side wall 11, a second side wall 12, a front wall 13, a floor 14, and a ceiling 15. The space 10 is, for example, a toilet space. The space 10 may also be considered as a single room.

[0023] An exhaust port 16 is provided in the ceiling 15 (or the first side wall 11, the second side wall 12, the front wall 13, or the floor 14).

[0024] The exhaust port 16 may be connected to a ventilation device (not shown). A force acts on the air on the space 10 side, drawing it into the exhaust port 16. The air in the space 10 is drawn into the exhaust port 16 and discharged to the outside of the space 10.

[0025] The opening 6 is provided in the lining 3 (for example, the upper cover 3b, etc.). The opening 6 may be provided anywhere in the lining 3.

[0026] The opening 6 is connected to the upstream end of the duct 4 .

[0027] The downstream end of the duct 4 is connected to a deflection member 5 .

[0028] The deflection member 5 is provided on the ceiling 15 (or the first side wall 11, the second side wall 12, the front wall 13, or the floor 14). The deflection member 5 has a member inlet 5a, a member outlet 5b, and a member body 5c. The deflection member 5 is a member that changes the direction of air flow. The direction of the member outlet 5b is adjusted so that the direction of air exiting from the member outlet 5b is toward the exhaust port 16.

[0029] The first fan 7 is provided at the air inlet 2. The first fan 7 acts to apply a force to the air in the space 10 such that the air is sucked into the air inlet 2. The first fan 7 is, for example, a propeller fan or a turbo fan.

[0030] Next, the operation of the ventilation system 1 will be described.

[0031] As shown by air flow 30 in FIGS. 3, 4 and 5, air in space 10 is sucked into the inside of lining 3 through suction port 2 by the action of first fan 7.

[0032] Air sucked into the inside of the lining 3 through the suction port 2 passes through the opening 6 and is blown out of the lining 3.

[0033] The air blown out of the lining 3 passes through the inside of the duct 4 and is blown out of the duct 4.

[0034] The air blown out of the duct 4 passes through the inside of the member main body 5c via the member inlet 5a, and is blown out of the member main body 5c (deflector 5) via the member outlet 5b.

[0035] A part or all of the air blown out of the deflection member 5 flows toward the exhaust port 16 and is sucked into the exhaust port 16 .

[0036] The air drawn into the exhaust port 16 is discharged to the outside of the space 10 .

[0037] Next, a description will be given of the operation when there is no first fan 7. To make the description easier to understand, consider a state in which the deflection member 5 is eliminated and the duct 4 is directly connected to the exhaust port 16.

[0038] In this case, since a force of sucking air is acting on the exhaust port 16, the air in the space 10 will be sucked in through the intake port 2 even if the first fan 7 is not provided.

[0039] However, a gap 42 exists between the exterior and interior of the lining 3 in addition to the suction port 2 .

[0040] A hole 41 is provided in the second side wall 12 (or the first side wall 11, etc.) to provide the pipe 21a (or the pipe 21b) inside the lining 3. That is, the pipe 21a and / or the pipe 21b passes through the hole 41.

[0041] The gap 42 is a small space formed between the hole 41 and the pipe 21a (or the pipe 21b).

[0042] Air outside the space 10 flows into the inside of the lining 3 through the gap 42 as a gap airflow 40.

[0043] The "amount of air passing through the opening 6" can be considered as the sum of the "amount of gap airflow 40" and the "amount of air sucked in through the suction port 2".

[0044] Therefore, when gap airflow 40 increases, the ratio of the "amount of air sucked through suction port 2" to the "amount of air passing through opening 6" decreases. As a result, the amount of air sucked into suction port 2 from space 10 decreases.

[0045] On the other hand, according to the ventilation system 1 of the present disclosure, since it has the first fan 7, it is possible to increase the "amount of air sucked through the air inlet 2." In other words, when the "amount of air passing through the opening 6" is used as a reference, it is possible to increase the ratio of the "amount of air sucked through the air inlet 2."

[0046] In this way, the amount of air drawn from the space 10 into the air inlet 2 can be increased, and the exhaust efficiency of the space 10 can be improved.

[0047] The first blower 7 also has the effect of increasing the pressure of the air inside the lining 3. By utilizing this effect, it is expected that the gap airflow 40 flowing into the inside of the lining 3 can be reduced. Therefore, when the "amount of air passing through the opening 6" is used as the standard, the proportion of the "amount of gap airflow 40" can be reduced, and the proportion of the "amount of air sucked in from the suction port 2" can be increased.

[0048] Example 2 In this embodiment, the same components as those in the other embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0049] As in the first embodiment, the air blowing system 1 has an air inlet 2, an opening 6, and a first air blower .

[0050] As shown in FIGS. 6 and 7, the ventilation system 1 includes a second fan 8.

[0051] The second fan 8 has an inlet 8a, an outlet 8b, and a main body 8c. The second fan 8 is, for example, a turbofan or a crossflow fan.

[0052] The corner where the front wall 13 and the first side wall 11 are connected is referred to as a corner portion 51.

[0053] The second fan 8 is provided at a corner 51 on the ceiling 15 (or the first side wall 11 or the front wall 13).

[0054] The opening 6 is provided at a corner 51 of the top cover 3b or the like.

[0055] As shown in FIG. 8, the air blowing system 1 has a deflector 61.

[0056] The deflector 61 is a plate that changes the direction of the airflow and is provided downstream of the first fan 7.

[0057] The pipe 21 a and / or the pipe 21 b penetrates the second side wall 12 and is provided inside the lining 3 .

[0058] In this embodiment, it is assumed that holes 41 and gaps 42 as shown in Fig. 3 are present around the pipe 21a and / or pipe 21b. The air may flow into the inside of the lining 3. Here, the holes 41 are not limited to being provided in the first side wall 11 or the second side wall 12, but may also be provided in the front wall 13.

[0059] Next, the operation of the ventilation system 1 will be described.

[0060] As shown by air flow 31 , air in space 10 is sucked into the inside of lining 3 through suction port 2 by the action of first fan 7 .

[0061] The deflector plate 61 is adjusted so that the airflow blown out from the first fan 7 is directed toward the opening 6. The deflector plate 61 is also adjusted so that the airflow blown out from the first fan 7 flows in the opposite direction to the hole 41.

[0062] The air sucked into the inside of the lining 3 through the suction port 2 moves toward the opening 6 while being influenced in its traveling direction by the deflector plate 61. The air then passes through the opening 6 and is blown out of the lining 3.

[0063] The air blown out of the lining 3 from the opening 6 at the corner 51 rises along the surface in the vicinity of the corner 51 due to the Coanda effect. That is, the air rises while remaining in the vicinity of the corner 51.

[0064] The air that rises while remaining near corner 51 is drawn into main body 8c through inlet 8a and blown out through outlet 8b.

[0065] The air blown out from the air outlet 8b travels toward the exhaust outlet 16 along the ceiling 15 (or another wall surface).

[0066] A part or all of the air blown out from the air outlet 8b toward the exhaust port 16 is sucked into the exhaust port 16.

[0067] The air drawn into the exhaust port 16 is discharged to the outside of the space 10 .

[0068] (supplement) Below, additional information will be provided regarding each example.

[0069] The ventilation system 1 is a system for sucking air from a space 10 into the inside of a lining 3 through an inlet 2 by the action of a first fan 7 and discharging the air to the outside of the space 10 through an opening 6.

[0070] One first fan 7 may be provided for any one of the air inlets 2.

[0071] Duct 4, deflection member 5, second fan 8, etc. are not essential. This is because a force that sucks air from space 10 acts on exhaust port 16, so even if duct 4, deflection member 5, and second fan 8 are not provided, some or all of the air blown out from opening 6 will be sucked into exhaust port 16.

[0072] The deflection member 5 may be a single plate, and the member inlet 5a and the member outlet 5b are not essential. The deflection member 5 can change the air flow even without the member inlet 5a and the member outlet 5b.

[0073] The duct 4 may be directly connected to the exhaust port 16 without using the deflection member 5 .

[0074] The inlet 8 a of the second fan 8 may be connected to the duct 4 .

[0075] The deflector 61 is not essential because the air drawn in from the air inlet 2 is blown out from the opening 6 by the action of the first blower 7 even without the deflector 61.

[0076] A hole 41 for passing the pipe 21 a and / or the pipe 21 b may be provided in the first side wall 11 , and an opening 6 may be provided near the second side wall 12 .

[0077] The first side wall 11 may have a hole 41 formed therein, and the opening 6 may be formed in the vicinity of the first side wall 11 .

[0078] The second side wall 12 may have a hole 41 formed therein, and the opening 6 may be formed in the vicinity of the second side wall 12 .

[0079] The first side wall 11 may be the left side wall, and the second side wall 12 may be the right side wall.

[0080] Opening 6 may be provided at a location other than corner 51. Also, opening 6 may be provided at a location other than top cover 3b. This is because by adjusting the direction of air blown out from opening 6 toward exhaust port 16, it is possible to exhaust part or all of the air blown out from opening 6 to outside space 10 via exhaust port 16.

[0081] The second fan 8 may be located at a position other than the corner portion 51. This is because by adjusting the direction of the air blown out from the air outlet 8b of the second fan 8 so that it is directed toward the exhaust port 16, it is possible to exhaust part or all of the air blown out from the opening 6 to the outside of the space 10 through the exhaust port 16.

[0082] Gap airflow 40 may occur from places other than gap 42 provided between hole 41 and pipe 21a (pipe 21b). For example, a gap may occur between lining 3 and first side wall 11 (or second side wall 12, front wall 13, floor 14, etc.). Therefore, gap airflow 40 may also occur from such a gap.

[0083] Furthermore, terms indicating the relationship between elements, such as parallel and perpendicular, terms indicating shapes, and numerical ranges do not only express strict meanings, but also include substantially equivalent ranges, for example, differences of a few percent.

[0084] Next, other effects of the present disclosure will be described.

[0085] It is also possible to guide all air passing through the opening 6 to the exhaust port 16 for discharge. Alternatively, the air volume discharged from the exhaust port 16 can be controlled to be constant. Ideally, the ratio of the amount of air passing through the opening 6 to the amount of air drawn through the intake port 2 is equal to the amount of air drawn through the intake port 2. This maximizes the efficiency of exhausting air above the floor 14. However, in practice, a gap airflow 40 may occur. In this case, the amount of air passing through the opening 6 can be considered as the sum of the amount of gap airflow 40 and the amount of air drawn through the intake port 2. When gap airflow 40 occurs, the ratio of the amount of air drawn through the intake port 2 to the amount of air passing through the opening 6 decreases. The ventilation system 1 of the present disclosure, which includes the first fan 7, can increase the ratio of the amount of air drawn through the intake port 2 to the amount of air passing through the opening 6. The first blower 7 can make the inside of the lining 3 closer to positive pressure, and this action can also reduce the ratio of the "amount of gap airflow 40" to the "amount of air passing through the opening 6". As a result of these, it is possible to make the "amount of air passing through the opening 6" approximately equal to the "amount of air sucked in from the suction port 2". If the "amount of air passing through the opening 6" is approximately equal to the "amount of air sucked in from the suction port 2", the "gap airflow" can be reduced. It is possible to make the amount of flow 40 approximately equal to 0. Therefore, the exhaust efficiency of the space 10 can be improved.

[0086] Furthermore, the air blowing system 1 of the present disclosure can improve the exhaust efficiency of the space 10 without requiring the duct 4 or the like to penetrate the ceiling 15 (or the wall surface). For this reason, the air blowing system 1 can be easily applied to existing toilets and the like.

[0087] The following items are independent of the scope of the claims. Although specific descriptions may be provided, they are merely examples and do not limit the scope of the claims.

[0088] (Item 1) The air blowing system 1 is applied to a lining 3 provided in a space 10 having a toilet bowl 20, The space 10 communicates with an exhaust port 16, The lining 3 includes a front cover 3a and an upper cover 3b. Pipes 21a and / or 21b through which water flows are provided inside the lining 3, The air blowing system 1 includes an air inlet 2, an opening 6, and a first air blower 7. The intake port 2 is provided in the front cover 3a, The opening 6 is provided in the lining 3 (the upper cover 3b, the front cover 3a, or other part), The first fan 7 is provided at the intake port 2, The air drawn in from the suction port 2 by the first blower 7 passes through the inside of the lining 3 and is blown out of the lining 3 from the opening 6. A configuration may be adopted in which a part or all of the air blown out of the lining 3 from the opening 6 is discharged out of the space 10 via the exhaust port 16.

[0089] According to this configuration, the amount of air drawn in through the air inlet 2 can be increased, and therefore the exhaust efficiency of the space 10 can be improved.

[0090] Furthermore, there is a risk that gap airflow 40 may flow into the inside of the lining 3. Even in this case, the presence of the first fan 7 makes it possible to create a positive pressure (or a pressure close to positive) inside the lining 3, thereby suppressing the inflow of gap airflow 40. For these reasons as well, the exhaust efficiency of the space 10 can be improved.

[0091] (Item 2) It has duct 4, The duct 4 is connected to the opening 6, The air blown out of the lining 3 from the opening 6 flows upward through the duct 4 and is then blown out of the duct 4. A configuration may be adopted in which part or all of the air blown out of the duct 4 is discharged to the outside of the space 10 via the exhaust port 16.

[0092] According to this configuration, the air to be exhausted via the duct 4 can be brought closer to the exhaust port 16, and therefore the exhaust efficiency of the space 10 can be further improved.

[0093] (Item 3) A deflector 5 is provided to change the direction of air flow. The deflector 5 is connected to the duct 4, The deflector 5 may be configured to change the flow direction of the air blown out of the duct 4 toward the exhaust port 16 .

[0094] According to this configuration, the proportion of air to be exhausted that is drawn into the exhaust port 16 can be increased, and therefore the exhaust efficiency of the space 10 can be further improved.

[0095] (Item 4) A second fan 8 is provided. The second fan 8 may be configured to suck in the air blown out of the lining 3 through the opening 6 and blow the sucked air out towards the exhaust port 16.

[0096] According to this configuration, the proportion of air to be exhausted that is drawn into the exhaust port 16 can be increased, and therefore the exhaust efficiency of the space 10 can be further improved.

[0097] (Item 5) The space 10 is formed between the ceiling 15 and the floor 14, The second fan 8 is provided on the ceiling 15, The air blown out from the second fan 8 toward the exhaust port 16 may be configured to flow along the ceiling 15.

[0098] According to this configuration, the proportion of air to be exhausted that is drawn into the exhaust port 16 can be increased, and therefore the exhaust efficiency of the space 10 can be further improved.

[0099] (Item 6) The space 10 is formed so as to be surrounded by a first side wall 11, a second side wall 12, and a front wall 13. The front wall 13 is located between the first side wall 11 and the second side wall 12, The opening 6 and the second fan 8 may be provided at a corner 51 where the first side wall 11 and the front wall 13 are connected.

[0100] According to this configuration, the proportion of air to be exhausted that is drawn into the exhaust port 16 can be increased, and therefore the exhaust efficiency of the space 10 can be further improved.

[0101] When air flows along one surface, the Coanda effect causes the air to be drawn to nearby surfaces or to flow in such a way that it maintains contact with the surface. By providing the opening 6 at the corner 51 where the two surfaces, the first side wall 11 and the front wall 13, are connected, a stronger Coanda effect can be expected than when air flows along only one surface. By utilizing this property, the air blown out from the opening 6 flows efficiently along the corner 51. This air is then sucked into the second fan 8 provided at the corner 51. This air is then blown out by the second fan 8 toward the exhaust port 16. In this way, the air to be exhausted is efficiently discharged from the exhaust port 16.

[0102] (Item 7) The second side wall 12 may be provided with a hole 41 for passing the pipe 21a and / or the pipe 21b therethrough.

[0103] With this configuration, the position of the opening 6 is away from the hole 41, which can suppress the generation of gap airflow 40 around the hole 41. As a result, the amount of air sucked in through the air inlet 2 can be increased.

[0104] Furthermore, since the occurrence of gap airflow 40 can be suppressed, the total amount of air sucked in through intake port 2 can be made closer to the amount of air blown out through opening 6.

[0105] (Item 8) The space 10 is formed so as to be surrounded by a first side wall 11, a second side wall 12, and a front wall 13. A hole 41 for passing the pipe 21a and / or the pipe 21b is provided in the second side wall 12 or the front wall 13, A deflector 61 is provided inside the lining 3 on the downstream side of the first blower 7, The deflector plate 61 may be configured to change the flow direction of the air sucked through the air inlet 2 to the opposite direction from the position where the holes 41 are located.

[0106] This configuration can reduce the effect that the air sucked in from the air inlet 2 has on the gap airflow 40. Therefore, the generation of the gap airflow 40 can be suppressed.

[0107] Furthermore, since the occurrence of gap airflow 40 can be suppressed, the total amount of air sucked in through intake port 2 can be made closer to the amount of air blown out through opening 6.

[0108] In addition, the deflector plate 61 also has the effect of preventing the air forced into the lining 3 by the first fan 7 from flowing out of the lining 3 (that is, the space 10) through the gap 42.

[0109] (Item 9) The hole 41 is provided in the second side wall 12, The opening 6 may be provided at a position closer to the first side wall 11 than to the second side wall 12.

[0110] According to this configuration, the position of the opening 6 is away from the hole 41, so that the generation of the gap airflow 40 around the hole 41 can be suppressed.

[0111] Although the ventilation system according to the present disclosure has been described above based on the examples, the present disclosure is not limited to the examples. As long as it does not deviate from the spirit of the present disclosure, various modifications conceivable by a person skilled in the art to the examples and configurations constructed by combining components of different examples are also included within the scope of the present disclosure. [Explanation of symbols]

[0112] 1. Ventilation system 2 Intake port 3. Lining 3a Front cover 3b Top cover 4 Duct 5 Deflection member 5a Material entrance 5b Material outlet 5c Main body of the component 6 aperture 7 1st blower 8 Second blower 8a Inlet 8b Air outlet 8c body 10 Space 11 First side wall 12 Second side wall 13 Front wall 14 beds 15 Ceiling 16 Exhaust port 20 Toilet 21a Piping 21b Piping 30 Air Flow 31 Air Flow 40 Narrow gap airflow 41 holes 42 Gap 51 Corner 61 Deflection plate

Claims

1. A ventilation system applied to a lining provided in a space having a toilet, The space communicates with an exhaust port, The lining includes a front cover and a top cover, A pipe through which water flows is provided inside the lining, the air blowing system includes an air inlet, an opening, and a first air blower; The suction port is provided in the front cover, the opening is provided in the lining, The first fan is provided at the air inlet, The air drawn in from the suction port by the first fan passes through the inside of the lining and is blown out of the lining from the opening, A ventilation system in which some or all of the air blown out of the lining from the opening is discharged to the outside of the space through the exhaust port.

2. having a duct, the duct is connected to the opening; The air blown out of the lining from the opening flows upward through the duct and is then blown out of the duct, The ventilation system according to claim 1 , wherein a part or all of the air blown out of the duct is discharged to the outside of the space through the exhaust port.

3. A deflector member is provided to change the direction of air flow, the deflector is connected to the duct; The ventilation system according to claim 2 , wherein the deflector changes the flow direction of the air blown out of the duct toward the exhaust port.

4. A second fan is provided. The ventilation system according to claim 1 , wherein the second fan sucks in air blown out of the lining through the opening and blows the sucked air toward the exhaust port.

5. The space is formed between the ceiling and the floor, The second fan is provided on the ceiling, The ventilation system according to claim 4 , wherein the air blown out by the second fan toward the exhaust port flows along the ceiling.

6. the space is formed so as to be surrounded by a first side wall, a second side wall, and a front wall; the front wall is located between the first side wall and the second side wall, The ventilation system according to claim 5 , wherein the opening and the second fan are provided at a corner where the first side wall and the front wall are connected.

7. The air blowing system according to claim 6 , wherein the second side wall is provided with a hole for passing the piping therethrough.

8. the space is formed so as to be surrounded by a first side wall, a second side wall, and a front wall; a hole for passing the piping through is provided in the second side wall or the front wall; a deflector disposed inside the lining on the downstream side of the first blower; The air blowing system according to claim 1 , wherein the deflector changes the flow direction of the air drawn in through the air inlet to a direction opposite to the position of the hole.

9. the hole is provided in the second side wall, The ventilation system according to claim 8 , wherein the opening is provided at a position closer to the first side wall than to the second side wall.

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