JP2015171415A - Compression smoke prevention and exhaustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compression smoke prevention and exhaustion equipment enabled to perform an efficient and reliable smoke insulation by reducing an excessive air-supply in the compression smoke prevention and exhaustion equipment.SOLUTION: A compression smoke prevention and exhaustion equipment 10 for feeding air in a structure 1 from an air supply port 4 via an attachment chamber 2 to a smoke insulation opening 3 comprises airflow guiding means 20 for guiding the airflow F by the air-supply from the air supply port 4, into a downward flow Df from the upper part As of the smoke insulation opening 3.

Description

  The present invention relates to a pressurized smoke-proofing facility, and more specifically, to a technology that enables efficient and reliable smoke shielding by reducing surplus air supply in the pressurized smoke-proofing facility.

  In a structure of a predetermined scale, it is necessary to install smoke emission equipment that appropriately discharges smoke generated in the event of a fire and facilitates evacuation and fire fighting activities. Among them, the pressurized smoke-proofing equipment is designed to prevent smoke from flowing from the air supply vents at bases for evacuation and fire extinguishing activities, such as rooms adjacent to evacuation stairs, special evacuation stairs, and other similar rooms. By pressurizing the opening, it has a function of eliminating smoke inside and preventing inflow of smoke from outside.

  The following technologies have been proposed as technologies related to such pressurized smoke prevention equipment. In other words, when a fire breaks out in a room, the smoke in the room is discharged outside to create a negative pressure, and air is supplied to the hallway through the room to add the room and hallway. Fire prevention method that keeps the pressure in the corridor lower than the pressure in the ancillary room by discharging the air in the corridor to the outside when the smoke exhaust operation from the living room is stopped as the fire progresses (Patent Document) 1) etc. have been proposed.

JP 11-319126 A

  In the above-described pressurized smoke-proofing equipment, the smoke shield door Sd is half-opened as shown in FIGS. 1 and 2 in consideration of the evacuation behavior of the residents and the situation where the fire hose is caught during fire fighting activities. The situation is assumed from the beginning. The opening So of the smoke shield door Sd is a smoke shield opening. In this situation, a part of the smoke Sm generated in the adjacent room 6 rises near the boundary between the adjacent room 6 and the attached room 2 due to the buoyancy due to the high temperature even if the smoke is blocked by the supply air. Then, it tries to enter the auxiliary room 6 through the space As above the half-opened smoke shielding part door.

  In order to perform reliable smoke shielding corresponding to such a situation, there exists a technical idea that raises the static pressure that exerts a smoke shielding effect on the opening So of the smoke shielding door Sd that is a smoke shielding opening from all directions. In the static pressure field where such static pressure is dominant, the wind speed distribution (distribution in which the wind speed decreases as it approaches the upper end of the smoke shield opening) is generated in the smoke shield opening due to its characteristics (see FIG. 3). . When attempting to achieve smoke shielding in a static pressure field with such a wind speed distribution, it is necessary to achieve wind speed = 0 at the upper end of the smoke shielding opening, while excessive wind speed is generated near the lower part of the smoke shielding opening. Therefore, the air supply including the surplus that does not contribute to the smoke shielding effect is performed.

  Therefore, an object of the present invention is to provide a technique that reduces the excess air supply in the pressurized smoke-proofing facility and enables efficient and reliable smoke shielding.

  A pressurized smoke evacuation facility that solves the above problem is a pressurized smoke evacuation facility that supplies air to a smoke shielding opening from an air supply port through an attached room in a structure, and the air flow generated by the air supply is It is characterized by comprising an airflow guiding means for making a downward flow from above the smoke shielding opening.

  According to this, the air supply for the excess wind speed conventionally generated in the lower part of the smoke shielding opening is distributed to the upper part of the smoke shielding opening, and the wind speed with less bias than in the past is realized at each position of the smoke shielding opening. Thus, it is possible to achieve smoke shielding with a smaller air supply amount than when performing static shielding by forming a static pressure field. Therefore, surplus air supply in the pressurized smoke-proofing facility is reduced, and efficient and reliable smoke shielding is possible.

  In the above-described pressurized smoke-proofing facility, the airflow guiding means may be a guiding structure that guides the airflow from an air supply path through the air supply port to above the smoke shielding opening.

  According to this, it is possible to reliably guide the airflow supplied from the air supply airway to above the smoke shielding opening and form a downward flow at the corresponding position. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  Moreover, in the above-described pressurized smoke-proofing facility, the guide structure may be configured by a duct extending from an air supply opening provided on a wall surface of the attached room to directly above the smoke shielding opening.

  According to this, the downward flow from the upper part of the smoke-shielding opening can be achieved only by installing a horizontal duct near the ceiling of the room without any particular modification to the air supply opening originally provided on the wall of the room. It becomes possible to form. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  Further, in the above-described pressurized smoke-exhaust equipment, the guide structure includes an air supply air passage extending over the auxiliary room to a position directly above the smoke-proof opening part, and the smoke-shielding opening part of the ceiling surface of the auxiliary room. It is good also as what is comprised from the air supply opening opened to the said air supply air path just above.

  According to this, using a structure in which the air supply airway crosses the attached room and installing the air supply inlet directly above the smoke-shielding opening in the air supply airway, the air supply airway is blocked without excessive costs and effort. It is possible to form a downward flow from above the smoke opening. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  Further, in the above-described pressurized smoke-proofing facility, the guide structure is such that the upper end of the air supply opening is higher than the upper end of the smoke-shielding opening, and the lower end of the air-supply opening is the smoke-shielding opening. In the case where it is in a position lower than the upper end of the air-conditioner, a drooping wall that substantially faces the air supply port and extends directly from the ceiling of the attached room to the smoke shielding opening may be included.

  According to this, airflow from the air supply port collides with the above-described dripping wall and flows down along the wall surface, thereby reliably forming a downward flow toward the upper part of the smoke shielding opening immediately below the dripping wall. It will be. In addition, these drooping walls can be constructed with inexpensive materials such as general plate materials without excessive effort, and this enables efficient and low cost downflow from above the smoke shield opening. I can do it. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  Further, in the above-described pressurized smoke-proofing facility, the guide structure is configured such that the air flow caused by the air supply from the air supply port when the upper end of the air supply port is lower than the upper end of the smoke shield opening. It may be possible to include an air flow ascending structure where

  According to this, it corresponds to the structure in which the air supply port is arranged at a low position on the wall surface of the annex room, directs the airflow generated from such an air intake port above the smoke shield opening, It can collide with the surrounding wall surface etc., and can finally form the downward flow from smoke-shielding opening upper part. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  In the above-described pressurized smoke-exhaust equipment, the guide structure may further include a hanging wall that substantially faces the installation wall surface of the air supply port and extends directly from the ceiling of the attached room to the smoke shielding opening. .

  According to this, the air flow directed above the smoke shielding opening by the above-described air flow rising structure collides with the hanging wall and flows down along the wall surface, so that the upper portion of the smoke shielding opening just below the hanging wall is formed. This will surely form a downward flow directed toward it. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  Further, in the pressurized smoke-proofing facility described above, the airflow raising structure has a width greater than the opening width of the air supply port and a height greater than the opening height of the air supply port, It is good also as an inclination stand inclined toward upper space from the opening lower end.

  According to this, it becomes possible to guide the air flow from the air supply port without leaking and to make it an upward flow, and to direct it to the upper part of the smoke shielding opening. As a result, the airflow that has risen can collide with the ceiling of the attached room or the surrounding wall surface in the extension direction, and finally a downward flow can be formed from above the smoke shielding opening. Therefore, this downward flow distributes appropriate air supply to the upper part of the smoke shield opening, and realizes a wind speed with less bias than before in each position of the smoke shield opening, thereby forming a static pressure field and preventing smoke It is possible to achieve smoke shielding with a smaller air supply than when performing the above.

  Further, in the above-described pressurized smoke-exhaust equipment, the air flow raising structure includes a louver structure including a plurality of wing plates that are substantially parallel to the opening surface of the air supply port and are adjustable in angle, and is received by the wing plates. It may be a structure that guides the airflow by the air supply toward the upper space of the attached room according to the angle of the slats.

  According to this, in addition to each effect by the downward flow mentioned above, there exist the following effects. That is, the airflow rising structure is almost integrated with the air supply port, and there is no inherent concern that the floor area of the attached room will be reduced, and the degree of freedom in facility planning will be good. Also, for example, during normal times, the wing plate is rotated so that the main surface of each wing plate is parallel to the air supply opening, and the air supply port is covered with the wing plate. It is possible to freely control the smoke shielding operation such that the air supply port is opened by appropriately rotating from the normal state and the air supply from the air supply port is enabled.

  According to the present invention, it is possible to reduce surplus air supply in the pressurized smoke-proofing facility and to perform efficient and reliable smoke shielding.

It is a top view which shows the example of the smoke-shielding situation in the smoke-shielding part door vicinity in the past. It is a perspective view which shows the example of the smoke-shielding situation in the smoke-shielding part door vicinity in the past. It is explanatory drawing which shows the example of a wind speed distribution in the boundary vicinity of each chamber which is a static pressure field. It is sectional drawing which shows the example of a wind speed distribution in the pressurization smoke prevention equipment of this embodiment. It is a top view which shows the structural example of the building which applies the pressurized smoke prevention equipment of this embodiment. It is sectional drawing which shows the structural example 1 of the pressurization smoke prevention equipment in this embodiment. It is sectional drawing which shows the structural example 2 of the pressurization smoke prevention equipment in this embodiment. It is a top view which shows the structural example 3 of the pressurization smoke prevention apparatus in this embodiment. It is sectional drawing which shows the structural example 3 of the pressurized smoke prevention equipment in this embodiment. It is a top view which shows the structural example 4 of the pressurization smoke prevention apparatus in this embodiment. It is sectional drawing which shows the structural example 4 of the pressurization smoke prevention equipment in this embodiment. It is a perspective view which shows the detailed structure of the louver structure (at the time of a fire) in this embodiment. It is explanatory drawing which shows operation | movement of the example (at the time of normal temperature) of the louver structure in this embodiment. It is explanatory drawing which shows operation | movement of the example (at the time of a fire) of the louver structure in this embodiment.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 4 is an explanatory diagram showing an example of wind speed distribution in the pressurized smoke-exhaust equipment 10 of the present embodiment. First, an overview of the significance of the pressurized smoke-exhaust equipment 10 of the present embodiment will be given. As shown in FIG. 4, the pressurized smoke evacuation facility 10 in the present embodiment is applied to the building 1, and the downward flow Df from the upper space As of the smoke shielding opening 3 is formed in the auxiliary room 2. In addition, a wind speed distribution with little bias is realized at each position in the vertical direction of the smoke shield opening 3, and the intrusion of smoke Sm into the smoke shield opening 3 is suppressed without omission. This leads to the achievement of smoke shielding with a smaller air supply amount than when a static pressure field is formed and smoke shielding is performed. Therefore, the pressurized smoke-removing facility 10 of the present embodiment reduces the excess air supply to the ancillary room 2 and enables efficient and reliable smoke shielding.

  For example, as shown in FIGS. 4 and 5, the structure 1 of the building 1 to which the pressurized smoke-proofing facility 10 is applied includes a supply air passage 8, a staircase 7 and its annex 2, which communicate with the outside air. It has a structure including an adjacent room 6 such as a corridor that communicates with the auxiliary room 2 through the smoke-shielding opening 3 when the smoke-shielding door Sd is opened. The staircase 7 is a direct staircase that leads to floors 15 or more of the building 1 or 3 floors below the basement. The general room (not shown) following the adjacent room 7 is provided with an air escape port, which is taken into the auxiliary room 2 through the air supply port 4 and from the adjacent room 6 through the smoke shield opening 3. It is assumed that the air flowing into the air is appropriately discharged. In addition, when a fire occurs, the intake mechanism of the air supply port 4 that has received a signal from an appropriate fire detection means such as a fire alarm operates to start supplying air to the attached room 2. Further, the smoke shielding opening 3 serves as an opening of the smoke shielding door Sd.

  FIG. 6 is a cross-sectional view showing a configuration example 1 of the pressurized smoke-exhaust equipment 10 in the present embodiment. In the pressurized smoke evacuation facility 10 according to the present embodiment, the supply air passage 8 is extended on the annexed room 2 to a position directly above the smoke shielding opening 3, and this extended portion is used as the supply air passage extension 30. . Further, the air supply port 4 in the pressurized smoke proofing facility 10 of the present embodiment is configured to open to the air supply airway extension 30 directly above the smoke shielding opening 3 in the ceiling surface 2e of the ancillary room 2. . Therefore, the guiding structure as the airflow guiding means 20 that changes the airflow F by the supply air into the downward flow Df from the upper As of the smoke shielding opening 3 includes the above-described supply port 4 and the supply airway extension 30. It consists of an air duct 8.

  The flow of air flowing into the supply airway extension 30 from the supply airway 8 via an appropriate intake mechanism such as an intake fan, that is, the airflow F reaches the airway end wall 31 of the supply airway extension 30 and temporarily receives it. Since the advancing direction up to that time is blocked by the air passage end wall 31, the air flow descends along the air passage end wall 31 and communicates between the bottom of the supply air passage extension 30 and the ceiling 2 e of the auxiliary room 2. The downward flow Df that passes through the air supply port 4 to be directed toward the floor surface 2f of the auxiliary chamber 2 is formed.

  By this downward flow, an appropriate supply air is distributed to the upper part As of the smoke-shielding opening 3, and a wind velocity distribution with less bias than before is realized at each of the upper and lower positions of the smoke-shielding opening 3, thereby forming a static pressure field. Thus, it is possible to achieve smoke shielding with a smaller amount of air supply than when smoke shielding is performed. In addition, the structure is such that the air supply duct 8 is installed on the auxiliary room 2 and the air supply opening 4 is installed immediately above the smoke shielding opening 3 in the air supply extension section 30. Excessive costs and labor for installing the equipment 10 are not required.

  Then, the other form of the pressurized smoke prevention equipment 10 is demonstrated. FIG. 7 is a plan view showing a configuration example 2 of the pressurized smoke prevention equipment 10 in the present embodiment. The pressurized smoke evacuation facility 10 in this example includes a duct 40 as a guide structure as the airflow guide means 20 described above. The duct 40 is a horizontal duct that extends from the air supply port 4 provided on the wall surface 9 of the attached room to As directly above the smoke shielding opening 3, and has a terminal 42 opened toward As directly above the smoke shielding opening 3. .

  The flow of air flowing into the duct 40 from the supply air passage 8 via an appropriate intake mechanism such as an intake fan, that is, the air flow F reaches the end wall 41 of the duct 40 and is temporarily received, and the traveling direction up to that point is determined as the end of the duct. Since it is blocked by the wall 41, it descends to the end 42 along the duct end wall 41, and forms a downward flow Df that goes from the As directly above the smoke shielding opening 3 to the floor surface 2f.

  By this downward flow Df, an appropriate supply air is distributed to the upper part As of the smoke-shielding opening 3, and a wind speed distribution with less bias than before is realized at each of the upper and lower positions of the smoke-shielding opening 3, thereby creating a static pressure field. Smoke shielding can be achieved with less air supply than when forming and smoke shielding. In addition, it is possible to form a necessary structure as the pressurized smoke-proofing facility 10 simply by installing the duct 40, which is a general building material, in the vicinity of the ceiling 2e of the annex 2; Therefore, excessive costs and labor are not required.

  Further, another embodiment of the pressurized smoke prevention equipment 10 will be described. FIG. 8 is a plan view showing a configuration example 3 of the pressurized smoke prevention equipment 10 in this embodiment, and FIG. 9 is a cross-sectional view showing a configuration example 3 of the pressure smoke prevention equipment 10 in this embodiment.

  In the building 1 to which the pressurized smoke prevention equipment 10 in this case is applied, the opening upper end 50 of the air supply port 4 is higher than the upper end 51 of the smoke shielding opening 3 and the opening lower end 52 of the air supply port 4 is blocked. Assume a situation where the smoke opening 3 is located at a position lower than the upper end 51. The structure for guiding the airflow F in the building 1 having such a configuration is composed of a hanging wall 55 that is substantially opposite to the air supply port 4 and extends from the ceiling 2e of the auxiliary room 2 to As just above the smoke shielding opening 3. The hanging wall 55 is a flat plate member having a dimension (width W2) at least equal to or larger than the opening width W1 of the air supply port 4, and the upper end surface is fixed to the ceiling 2e of the auxiliary chamber 2 in the auxiliary chamber 2 It is suspended stably.

  The flow of air that has flowed into the auxiliary chamber 2 from the supply air passage 8 through the intake port 4 via an appropriate intake mechanism such as an intake fan, that is, the air flow F, proceeds as it is and reaches the drooping wall 55 and is temporarily received. Since the traveling direction up to that time is blocked by the dripping wall 55, the descent flow Df descends along the dripping wall 55 and directly goes from the As directly above the smoke shielding opening 3 to the floor surface 2f. become.

  By this downward flow Df, an appropriate supply air is distributed to the upper part As of the smoke-shielding opening 3, and a wind speed distribution with less bias than before is realized at each of the upper and lower positions of the smoke-shielding opening 3, thereby creating a static pressure field. Smoke shielding can be achieved with less air supply than when forming and smoke shielding. Moreover, the pressure-proof smoke exhausting equipment 10 corresponding to the installation position of the air supply port 4 can be obtained simply by installing the hanging wall 55 composed of a plate-like member or the like, which is a general building material, on the ceiling 2 e of the annex 2. A necessary structure can be formed, and an excessive cost and labor for installing the pressurized smoke-proofing facility 10 are not required.

  Further, another embodiment of the pressurized smoke prevention equipment 10 will be described. FIG. 10 is a plan view showing a configuration example 4 of the pressurized smoke proofing facility 10 in the present embodiment, and FIG. 11 is a cross-sectional view showing a configuration example 4 of the pressurized smoke proofing facility 10 in the present embodiment.

  In the building 1 to which the pressurized smoke prevention equipment 10 in this case is applied, a situation is assumed in which the upper opening 50 of the air supply port 4 is located lower than the upper end 51 of the smoke shielding opening 3. In addition to the above-described hanging wall 55, the structure for guiding the airflow F in the building 1 having such a configuration includes an airflow raising structure in which the airflow F generated by the supply from the air supply port 4 is an upward flow.

  In the example shown in FIGS. 10 and 11, the tilt table 60 is applied as the air flow rising structure. The inclined base 60 has a width W3 that is greater than or equal to the opening width W1 of the air supply port 4 and a height H3 that is greater than or equal to the opening height H1 of the air supply port 4, and is above the opening lower end 52 of the air supply port 4, that is, It becomes a trapezoidal structure inclined toward the above-mentioned hanging wall 55.

  The flow of air that has flowed into the auxiliary chamber 2 from the supply air passage 8 via the intake port 4 via an appropriate intake mechanism such as an intake fan, that is, the airflow F, rises as it is along the rising slope 61 of the inclined base 60. Eventually it reached the ceiling 2e of the hanging wall 55 and the attached room 2 and was once received, and since the previous traveling direction was blocked by the hanging wall 55 and the ceiling 2e of the attached room 2, it descends along the hanging wall 55, As it is, a downward flow Df is formed from the As directly above the smoke shielding opening 3 toward the floor surface 2f.

  By this downward flow Df, an appropriate supply air is distributed to the upper part As of the smoke-shielding opening 3, and a wind speed distribution with less bias than before is realized at each of the upper and lower positions of the smoke-shielding opening 3, thereby creating a static pressure field. Smoke shielding can be achieved with less air supply than when forming and smoke shielding. Further, in addition to the above-described hanging wall 55, an air supply port can be obtained by simply placing an inclined base 60 on the floor 2f of the attached room 2 that can be simply configured by combining a plate-like member or the like that is a general building material. Therefore, it is possible to form a structure necessary for the pressurized smoke-and-evacuation facility 10 corresponding to the installation position 4, and an excessive cost and labor for installing the pressurized and smoke-free facility 10 are not required.

  Then, the other form of an airflow raising structure is demonstrated. FIG. 12 is a perspective view showing a detailed structure of the louver structure 70 (during a fire) in the present embodiment. The louver structure 70 shown here is composed of a plurality of vanes 41 that are substantially parallel to the opening surface 4a of the air supply port 4 and are adjustable in angle. Each wing plate 41 in the louver structure 40 is rotatably fixed by a rotating shaft 42 erected on the opening surface 4 a of the air supply port 4. Appropriate driving means (motors) are provided around the rotating shaft 42. It can be rotated at a predetermined angle by human power. In addition, the rotation of each slat 41 is synchronized between the slats, and a simultaneous rotation operation is performed.

  In such a louver structure 40, as shown in FIG. 13, in normal times, the wing plate 41 is rotated at an angle at which the main surface of each wing plate 41 is parallel to the air supply opening 4a. Covering. In this case, the louver structure 40 and the air supply port 4 are almost integrated, and there is essentially no concern of reducing the floor area of the auxiliary room 2.

  On the other hand, as shown in FIG. 14, in the event of a fire, each louver board 41 is appropriately rotated from the normal state by the above-described driving means to form a louver opening 43 and the air supply opening 4 is opened (FIG. 12, 14 state), air supply from the air supply port 4 is made possible. In this case, the airflow F flowing into the auxiliary chamber 2 from the opening surface 4 a of the air supply port 4 is temporarily received by each wing plate 41, but the louver opening 43 formed according to the rotation direction of the wing plate 41. It is guided in the direction, that is, the ascending direction toward the hanging wall 55 or the ceiling surface 2e of the attached room 2, and finally reaches the hanging wall 55 or the ceiling 2e of the attached room 2 and is temporarily received, and the traveling direction up to that point is drooping wall 55 and the ceiling 2e of the ancillary room 2 so that it descends along the drooping wall 55 and forms a downward flow Df that goes directly from As directly above the smoke shielding opening 3 toward the floor 2f.

  By this downward flow Df, an appropriate supply air is distributed to the upper part As of the smoke-shielding opening 3, and a wind speed distribution with less bias than before is realized at each of the upper and lower positions of the smoke-shielding opening 3, thereby creating a static pressure field. Smoke shielding can be achieved with less air supply than when forming and smoke shielding. Further, in addition to the above-described drooping wall 55, a structure required as the pressurized smoke-proof exhausting equipment 10 corresponding to the installation position of the air supply port 4 can be obtained simply by fitting a louver as a general building material into the air supply port 4. The excessive cost and labor for installation of the pressurized smoke proofing facility 10 can be eliminated.

  In addition, in this embodiment, although the example which assumed the building as a structure was demonstrated, the application object of this invention is not limited only to this. In addition to buildings such as buildings and plants, various civil engineering structures such as tunnels and their incidental facilities (eg, evacuation routes and shelters in civil engineering structures) are also applicable to the present invention.

  According to the present embodiment, surplus air supply in the pressurized smoke proofing facility is reduced, and efficient and reliable smoke shielding is possible.

  As mentioned above, although embodiment of this invention was described concretely based on the embodiment, it is not limited to this and can be variously changed in the range which does not deviate from the summary.

F Airflow Sd Smoke shield door Sm Smoke 1 Building (structure)
2 Annex 3 Smoke-shielding opening 4 Air supply opening 5 Air supply opening area 6 Adjacent room 7 Staircase 8 Air supply airway 9 Air supply opening installation wall surface 10 Pressurized smoke prevention equipment 20 Airflow guidance means 30 Air supply airway extension Port 31 End passage wall 40 Duct 41 Duct end wall 42 Duct end 50 Air supply opening upper end 51 Air shielding opening upper end 52 Air supply opening lower end 55 Dripping wall 60 Inclined stand (air flow rising structure)
70 louver structure (air flow rising structure)
71 Wing board 72 Rotating shaft 73 Louver opening

Claims (9)

  In the structure, in the pressurized smoke-removing facility for supplying air to the smoke-shielding opening from the air supply opening through the attached room, the air flow by the supply air is a downward flow from above the smoke-shielding opening, A pressurized smoke-exhaust facility comprising an airflow guiding means.   2. The pressurized smoke-proof facility according to claim 1, wherein the air flow guiding unit is a guiding structure that guides the air flow from a supply air path to the upper portion of the smoke shielding opening through the air supply port.   The guide structure includes an air supply airway that extends over the auxiliary room to a position directly above the smoke-shielding opening, and a supply air opening that opens to the air supply airway directly above the smoke-shielding opening of the ceiling surface of the auxiliary room. The pressurized smoke-exhaust equipment according to claim 2, wherein the pressure-exhaust smoke-exhaust equipment is constituted by a vent.   The pressurized smoke-exhaust equipment according to claim 2, wherein the guide structure is configured by a duct extending from an air supply port provided on a wall surface of the attached room to directly above the smoke shielding opening.   The guide structure is configured such that the upper end of the air supply opening is higher than the upper end of the smoke shield opening, and the lower end of the air supply opening is lower than the upper end of the smoke shield opening. 3. The pressurized smoke-proof facility according to claim 2, further comprising a hanging wall that substantially faces the air vent and extends directly from the ceiling of the annex room to the smoke-shielding opening.   The guide structure includes an air flow raising structure in which the air flow from the air supply port is an upward flow when the upper end of the air supply port is lower than the upper end of the smoke shielding opening. The pressurized smoke-proof facility according to claim 2,   The pressurization and prevention according to claim 6, wherein the guide structure further includes a drooping wall that is substantially opposite to a wall surface where the air supply port is installed and extends directly from the ceiling of the room to the smoke shielding opening. Smoke equipment.   The airflow rising structure has a width that is equal to or larger than the opening width of the air supply opening and a height that is equal to or higher than the opening height of the air supply opening, and is inclined to an upper space from the lower end of the opening of the air supply opening. The pressurized smoke-proof equipment according to claim 6 or 7, wherein   The air flow rising structure includes a louver structure including a plurality of wing plates that are substantially parallel to the opening surface of the air supply opening and the angle of which can be adjusted, and the air flow received by the wing plates is supplied to the angle of the wing plates. The pressurized smoke-exhaust equipment according to claim 6 or 7, wherein the pressurized smoke-exhaust equipment is a structure that leads toward the upper space of the attached room depending on