JP4515173B2 - Internal and external air flow control system in buildings - Google Patents

Description

  The present invention relates to a system that suppresses the flow of internal and external air through an entrance / exit in business buildings such as office buildings and commercial buildings, halls, and other various buildings.

  In general, various types of air conditioning are performed inside a building in order to keep temperature, humidity, cleanliness, etc. within suitable ranges according to the purpose. For this reason, when a person enters or exits a building or opens or closes an article when carrying in or out an article, the air inside and outside the building flows through the door according to the pressure difference and temperature difference between the inside and outside of the building. As a result, air conditioning is wasted. Especially in buildings with high rise and airtightness, the flow of air inside and outside the building is likely to increase due to the effect of the chimney effect, etc. In addition to the increase in air conditioning energy costs, door failure due to wind pressure, occupant air conditioning Problems such as promoting discomfort also arise.

  Therefore, conventionally, measures have been taken to prevent the flow of air inside and outside the building entrance by providing a revolving door, air curtain, double door, etc. at the entrance to the building. Normally, the revolving door system divides the space of the cylinder body into about four places with revolving doors, and the people can enter and leave the building by rotating the revolving door with people in the divided space. Yes. In this revolving door system, the side edge of the revolving door is always in contact with the inner surface of the cylindrical body, thereby preventing the flow of air inside and outside the entrance of the building.

  In the air curtain system, an air curtain is made by blowing a fast air flow parallel to the entrance and exit from the air outlets installed on the upper and left sides of the building entrance and exit, thereby preventing the flow of air inside and outside. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 5-288384) discloses a device that controls the air curtain blowing angle based on the pressure difference between the inside and outside of a building.

  In the double door method, a windbreak room is provided at the entrance of the building, doors are provided between the windbreak room and the outside of the building, and between the windbreak room and the inside of the building, respectively. Duplication makes it possible to prevent the circulation of air inside and outside. Further, as disclosed in, for example, Patent Document 2 (Japanese Patent Application Laid-Open No. 10-132354), there is also known one in which air curtains are provided before and after the windbreak chamber, respectively.

Japanese Patent Laid-Open No. 5-288384 Japanese Patent Laid-Open No. 10-132354

  However, the revolving door system is not suitable for buildings where people go in and out in a short time because the number of people who can pass through the doorway is limited by the rotation speed of the revolving door. In addition, the revolving door system has a risk of people being caught between the inner surface of the cylindrical body and the side edge of the revolving door.

  On the other hand, in the air curtain method, the air curtain may be broken if the pressure difference between the inside and outside of the building is large. In addition, because the high-speed airflow directly acts on people who pass through the doorway, there is a concern that it may cause discomfort.

  In addition, the double door system is not effective when the doors are close to each other or when many people go in and out, and the two doors open simultaneously.

  An object of the present invention is to reduce the flow of internal and external air at the doorway of a building as much as possible.

  In order to achieve such an object, according to the present invention, a windbreak booth is formed adjacent to a doorway of a building having an opening / closing door, an exhaust fan for exhausting air in the windbreak booth is provided, and the exhaust A first flow path for guiding fan exhaust to the outside of the building and a second flow path for guiding the exhaust to the inside of the building are formed, and when the atmospheric pressure outside the building is higher than the internal pressure, the wind Air in the booth is sent to the outside of the building through the first flow path, and when the atmospheric pressure inside the building is higher than the external pressure, the air in the windbreak booth is sent through the second flow path. Provided is a system for suppressing the flow of internal and external air in a building, characterized in that a control means for controlling the air to be sent into the building is provided.

  When the air in the windbreak booth is sent to the outside of the building through the first flow path, the exhaust fan is controlled so that the wind speed between the windbreak booth and the inside of the building is close to zero. When the amount of exhaust is controlled and the air in the windbreak booth is sent to the inside of the building through the second flow path, the wind speed between the windbreak booth and the outside of the building is made close to zero. In addition, the exhaust amount of the exhaust fan may be controlled. The exhaust fan may be operated only when the opening / closing door is opened. Further, when the open / close door is opened, the exhaust fan is operated, and in addition, when the open / close door is closed, the exhaust fan is operated so that the air in the windbreak booth is passed through the first flow path. You may be comprised so that it can send to the exterior of a building through.

  For example, when the air pressure outside the building is higher than the air pressure inside the building, when the door is opened, air tends to enter from the outside to the inside through the doorway. On the other hand, when the air pressure inside the building is higher than the air pressure outside the building, when the door is opened, air tends to flow out from the inside of the building through the doorway.

  Therefore, in the present invention, when the atmospheric pressure outside the building is higher than the internal atmospheric pressure, the air in the windbreak booth is sent to the outside of the building through the first flow path. As a result, the air that has entered the windbreak booth from the outside of the building is sucked by the exhaust fan in the windbreak booth before flowing into the building, and is returned to the outside of the building through the first flow path. . In this way, air outside the building is prevented from flowing into the building from the windbreak booth.

  In the present invention, when the air pressure inside the building is higher than the air pressure outside, the air in the windbreak booth is sent to the inside of the building through the second flow path. As a result, the air that has entered the windbreak booth from the inside of the building is sucked by the exhaust fan in the windbreak booth before flowing out of the building, and is returned to the inside of the building through the second flow path. . In this way, the air inside the building is prevented from flowing out of the building through the doorway.

  Here, when the air in the windbreak booth is sent to the outside of the building through the first flow path, the pressure in the windbreak booth becomes relatively high if the amount of exhaust by the exhaust fan is too small. Air entering the windbreak booth from the outside of the building will further enter the building. Conversely, if the amount of air exhausted by the exhaust fan is too large, the pressure in the windbreak booth becomes relatively low, so the air inside the building enters the windbreak booth and is exhausted from the windbreak booth by the exhaust fan. Will flow out of the building.

  Therefore, when the air in the windbreak booth is sent to the outside of the building through the first flow path, the wind speed at the boundary position between the windbreak booth and the inside of the building is detected. When it is detected that air is flowing from the windbreak booth toward the inside of the building, the drive is controlled so as to increase the exhaust amount of the exhaust fan. As a result, the air pressure in the windbreak booth is relatively lowered so that air does not flow into the building from the windbreak booth. Conversely, if it is detected that air is flowing from the inside of the building into the windbreak booth, the drive is controlled so as to reduce the exhaust amount of the exhaust fan. As a result, the air pressure in the windbreak booth is relatively increased so that air does not flow into the windbreak booth from the inside of the building. In this way, when the air in the windbreak booth is sent to the outside of the building through the first flow path, the exhaust fan is set so that the wind speed between the windbreak booth and the inside of the building approaches zero. By controlling the displacement, the movement of air between the inside of the windbreak booth and the inside of the building can be suppressed. As a result, the air outside the building flows into the inside of the building from the windbreak booth. The air inside the building can be surely suppressed from flowing out of the windbreak booth to the outside of the building. Note that the drive of the exhaust fan may be inverter controlled so that the exhaust amount of the exhaust fan can be variably controlled.

  On the other hand, when the air in the windbreak booth is sent to the inside of the building through the second flow path, the pressure in the windbreak booth becomes relatively high if the amount of exhaust by the exhaust fan is too small. The air that has flowed into the windbreak booth from the inside of the object will further flow out of the building. Conversely, if the amount of air exhausted by the exhaust fan is too large, the pressure inside the windbreak booth will be relatively low, so air outside the building will enter the windbreak booth and be exhausted from the windbreak booth by the exhaust fan. And get inside the building.

  Therefore, when the air in the windbreak booth is sent to the inside of the building through the second flow path, the wind speed at the boundary position between the windbreak booth and the outside of the building is detected. When it is detected that air is flowing out of the windbreak booth toward the outside of the building, the drive is controlled to increase the exhaust amount of the exhaust fan. As a result, the air pressure in the windbreak booth is relatively lowered so that air does not flow out of the windbreak booth toward the outside of the building. Conversely, when it is detected that air is flowing into the windbreak booth from the outside of the building, the drive is controlled so as to reduce the exhaust amount of the exhaust fan. As a result, the air pressure in the windbreak booth is relatively increased so that air does not flow into the windbreak booth from outside the building. In this way, when the air in the windbreak booth is sent to the outside of the building through the second flow path, the exhaust fan is set so that the wind speed between the windbreak booth and the outside of the building is close to zero. By controlling the displacement, air movement between the inside of the windbreak booth and the outside of the building can be suppressed, and as a result, the air inside the building flows out of the windbreak booth to the outside of the building. Can be reliably suppressed, and air outside the building can be reliably suppressed from entering the inside of the building from the windbreak booth. In this case as well, if the drive of the exhaust fan is controlled by an inverter, the exhaust amount of the exhaust fan can be variably controlled.

  While the door is closed, the flow of internal and external air at the entrance of the building is blocked by the door. Therefore, the exhaust fan may be controlled to operate only when the opening / closing door is opened, and the air in the windbreak booth may be exhausted through the first flow path or the second flow path. Then, the energy cost can be reduced by preventing the flow of air inside and outside the building only when necessary.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Drawing 1 is a longitudinal section showing the internal structure of building 1 provided with the distribution control system concerning an embodiment of the invention. FIG. 2 is a cross-sectional view of the same building 1. The building 1 is, for example, a business building or hall such as an office building or a commercial building.

  On the outer wall 2 of the building 1, an entrance / exit 3 is opened for people to enter and exit, and to carry in / out articles. A pair of opening / closing doors 4 and 4 that can be automatically opened to the left and right are attached to the doorway 3. Although these doors 4 and 4 are normally closed at the entrance 3, when a person or an article approaches the entrance 3, it is detected and opened to the left and right of the entrance 3, and there is a person or an article near the entrance 3. In the meantime, the doorway 3 is opened.

  A windbreak booth 10 is formed at a position immediately after entering the inside of the building 1 from the entrance 3 so as to be adjacent to the entrance 3. Both sides of the windbreak booth 10 are closed by side plates 11, 11, and the upper side of the windbreak booth 10 is covered by a ceiling board 12 having air permeability. In this case, the ceiling board 12 itself may be made of a material having air permeability, or the ceiling board 12 may be provided with air permeability by forming openings such as punching holes and slits. The entrance / exit 3 is located outside the windbreak booth 10 (left side in FIGS. 1 and 2). As described above, the entrance / exit 3 is normally closed by the opening / closing doors 4, 4, and the entrance / exit 3 is opened only when a person or an article approaches the entrance / exit 3. On the other hand, the inside of the windbreak booth 10 (the right side in FIGS. 1 and 2) is a passage opening 13 that is always open. In this embodiment, the passage opening 13 does not have anything that obstructs the passage of people or goods, such as the open / close doors 4 and 4 provided at the doorway 3, and is not limited to the case where people or goods approach. The passage opening 13 is always open.

  An exhaust fan 14 that exhausts the air in the windbreak booth 10 through the ceiling board 12 is provided in the exhaust chamber 14 formed in the upper portion of the windbreak booth 10 by being partitioned by the ceiling board 12. The exhaust fan 20 is disposed approximately at an intermediate position between the entrance 3 and the passage opening 13. As will be described later, the air outside the building 1 entering the windbreak booth 10 from the entrance 3 and the passage opening 13. Any air inside the building 1 that has entered the windbreak booth 10 can be exhausted equally by the exhaust fan 20. The exhaust fan 20 is connected to an inverter 21 for adjusting the operation amount. The inverter 21 can adjust the exhaust amount of air in the windbreak booth 10.

  In the exhaust chamber 14, the lower end of the duct 22 is connected to the discharge side of the exhaust fan 20. An external duct 25 and an internal duct 26 are connected to the upper end of the duct 22. As will be described in detail later, the external duct 25 forms a first flow path for sending the exhaust of the exhaust fan 20 to the outside of the building 1, and the internal duct 26 sends the second to the inside of the building 1. The flow path is formed. The air exhausted from the windbreak booth 10 can be sent from the duct 22 to either the external duct 25 or the internal duct 26.

  The external duct 25 communicates with an external exhaust port 30 disposed on the outer wall 2 of the building 1. The outer exhaust port 30 is opened so as to exhaust from the inside of the external duct 25 toward the outside (outdoor) of the building 1. An open / close damper 31 driven by a motor is interposed in the external duct 25. The open / close damper 31 is connected with a driver 32 for operating opening / closing by the motor drive. When the open / close damper 31 is opened, a flow path (first flow path) for exhausting the air exhausted from the windbreak booth 10 through the external duct 25 from the external exhaust port 30 toward the outside of the building 1 is opened. However, when the open / close damper 31 is closed, the air exhausted from the windbreak booth 10 cannot pass through the external duct 25 and is not exhausted toward the outside of the building 1.

  The internal duct 26 communicates with an internal exhaust port 35 that opens toward the inside (indoor) of the building 1. The inner exhaust port 35 is supported by a wall surface 36 disposed above the passage port 13 on the inside of the windbreak booth 10. The internal duct 26 is provided with an open / close damper 37 driven by a motor. The open / close damper 37 is connected with a driver 38 for operating opening / closing by the motor drive. When the open / close damper 37 is opened, a flow path (second flow path) is formed in which the air exhausted from the windbreak booth 10 is sent from the internal exhaust port 35 to the inside of the building 1 through the internal duct 26. When the open / close damper 37 is closed, the air exhausted from the windbreak booth 10 cannot pass through the internal duct 26 and is not sent toward the interior of the building 1.

  An inverter 21 that adjusts the amount of operation of the exhaust fan 20, a driver 32 that opens and closes an open / close damper 31 interposed in the external duct 25, and a driver that opens and closes an open / close damper 37 interposed in the internal duct 26 38 are all controlled by the control means 40. The atmospheric pressure detected by the detection unit 41 outside the building 1 and the atmospheric pressure detected by the detection unit 42 in the windbreak booth 10 are input to the differential pressure gauge 39. As will be described later, the detection unit 42 inputs the atmospheric pressure detected in a state where the open / close doors 4 and 4 are closed to the differential pressure gauge 39. As described above, the passage opening 13 formed on the inner side of the windbreak booth 10 is always open. Therefore, when the doors 4 and 4 are closed, the air pressure in the windbreak booth 10 is It is equal to the atmospheric pressure inside. For this reason, the detection unit 42 detects the atmospheric pressure inside the building 1 and inputs it to the differential pressure gauge 39. Thereby, the differential pressure gauge 39 detects the differential pressure inside and outside the building 1 based on the atmospheric pressure detected by the detectors 41 and 42 in a state where the opening and closing doors 4 and 4 are closed, and controls it. To enter.

  A wind speed sensor 43 is provided at the entrance / exit 3 which is the boundary between the outside of the building 1 and the windbreak booth 10, and the wind speed at the entrance / exit 3 detected by the wind speed sensor 43 is input to the control means 40. Has been. Similarly, a wind speed sensor 44 is provided in the passage opening 13 which is a boundary between the windbreak booth 10 and the inside of the building 1, and the wind speed at the entrance 3 detected by the wind speed sensor 44 is controlled by the control means 40. Has been entered. In addition, the opening and closing of the open / close doors 4 and 4 is also input to the control means 40 as information. As will be described later, the control means 40 operates and opens / closes the exhaust fan 20 based on the atmospheric pressure and wind speed detected by the atmospheric pressure sensors 41 and 42 and the wind speed sensors 43 and 44, and opening and closing of the doors 4 and 4. The opening and closing of the dampers 31 and 32 is controlled.

  Now, the operation of the distribution control system configured as described above will be described. First, when the doors 4 and 4 attached to the entrance 3 of the building 1 are closed, the opening of the building 1 through the entrance 3 is closed. There is no concern that air will circulate between the outside and the inside of the windbreak booth 10, and there is no concern that air will circulate between the outside of the building 1 and the inside of the building 1. Therefore, when the open / close doors 4 and 4 are closed in this way, the control means 40 stops the operation of the exhaust fan 20. The air flow inside and outside the building 1 is prevented by the doors 4 and 4.

  In addition, when the open / close doors 4 and 4 are closed as described above, there is a difference between the atmospheric pressure detected by the detection unit 41 outside the building 1 and the atmospheric pressure detected by the detection unit 42 in the windbreak booth 10. Input to the pressure gauge 39. In this case, since the pressure in the windbreak booth 10 is equal to the pressure inside the building 1 because the doors 4 and 4 are closed, the differential pressure gauge 39 detects the pressure inputted from the detection unit 41. The differential pressure inside and outside the building 1 is detected by the atmospheric pressure input from the unit 42. The differential pressure thus detected is input to the control means 40. In this way, the control means 40 can grasp in advance in a state in which the open / close doors 4 and 4 are closed which pressure is higher, that is, the pressure outside the building 1 or the pressure inside the building 1.

  Next, when people go in and out of the building 1 or when goods are carried in or out, the doors 4 and 4 open to the left and right of the doorway 3 when people or goods approach the doorway 3, The doorway 3 is opened. And since the doorway 3 is opened in this way, the air inside and outside the building 1 flows through the doorway 3.

  Therefore, when the doors 4 and 4 are opened and the doorway 3 is opened as described above, it is input to the control means 40 that the doors 4 and 4 are opened. Start operation. Then, the air that has entered the windbreak booth 10 from the outside of the building 1 through the opened entrance 3 or the air that has entered the windbreak booth 10 from the inside of the building 1 through the passage opening 13, In the windbreak booth 10, the air is sucked into the duct 22 and exhausted to the outside of the building 1 through the external duct 25 that is the first flow path, or through the internal duct 26 that is the second flow path. 1 is exhausted.

  In this case, since the control means 40 has grasped in advance the pressure difference inside and outside the building 1 in the state before the opening and closing doors 4 and 4 are opened as described above, the control means 40 is provided with the opening and closing doors 4 and 4. When is opened, it can be predicted whether the air will flow into the windbreak booth 10 from the outside of the building 1 or the inside of the building 1.

  That is, for example, if the pressure outside the building 1 is higher than the pressure inside the building 1 in the state before the doors 4 and 4 are opened, the doors 4 and 4 are opened simultaneously. Air outside the building 1 flows from the doorway 3 into the windbreak booth 10 and further flows into the building 1. Therefore, when the air pressure outside the building 1 is higher than the air pressure inside the building 1 in this way, the control means 40 controls the drivers 32 and 38 to intervene in the external duct 25. The mounted open / close damper 31 is opened, and the open / close damper 37 interposed in the internal duct 26 is closed. As a result, the duct 22 is brought into communication with the external exhaust port 30 from the external duct 25. Such opening / closing operations of the opening / closing dampers 31, 37 may be performed immediately before the opening / closing doors 4, 4 are opened, or may be performed in advance before the opening / closing doors 4, 4 are opened.

  Then, when the opening and closing doors 4 and 4 are opened, the operation of the exhaust fan 20 is started at the same time, so that the air that has entered the windbreak booth 10 from the outside of the building 1 through the doorway 3 enters the inside of the building 1. Before flowing in, it is forcibly sucked into the duct 22 in the windbreak booth 10 and exhausted to the outside of the building 1 through the external duct 25 which is the first flow path. In this way, air outside the building 1 is prevented from flowing into the inside of the building 1 from the windbreak booth 10.

  When the air in the windbreak booth 10 is sent to the outside of the building 1 through the external duct 25 serving as the first flow path, the control means 40 detects the windbreak booth detected by the wind speed sensor 44. The operating amount of the exhaust fan 20 is adjusted by the inverter 21 on the basis of the wind speed at the passage opening 13 between 10 and the inside of the building 1. That is, when the wind speed sensor 44 detects that air is flowing from the windbreak booth 10 toward the inside of the building 1, the control means 40 increases the exhaust amount of the exhaust fan 20 by the inverter 21. To control the drive. Then, since the air pressure in the windbreak booth 10 is relatively lowered due to an increase in the amount of exhaust into the duct 22, air does not flow from the windbreak booth 10 toward the inside of the building 1. . Conversely, when the wind speed sensor 44 detects that air is flowing from the inside of the building 1 into the windbreak booth 10, the control means 40 reduces the exhaust amount of the exhaust fan 20 by the inverter 21. To control the drive. Then, since the air pressure in the windbreak booth 10 is relatively increased due to a decrease in the amount of exhaust into the duct 22, air does not flow from the inside of the building 1 into the windbreak booth 10.

  Thus, when the air in the windbreak booth 10 is sent to the outside of the building 1 through the external duct 25 which is the first flow path, the windbreak booth 10 detected by the wind speed sensor 44 and the inside of the building 1 The control means 40 controls the exhaust amount of the exhaust fan 20 so that the wind speed at the passage port 13 between the two approaches the air movement between the inside of the windbreak booth 10 and the inside of the building 1. Can be prevented. As a result, the air outside the building 1 can be more reliably suppressed from flowing into the interior of the building 1 from the windbreak booth 10, and the air inside the building 1 flows from the windbreak booth 10 to the building 1. It is possible to more reliably suppress the flow out to the outside. Since the operating amount of the exhaust fan 20 is adjusted by the inverter 21, the control means 40 can control the exhaust fan 20 to an arbitrary exhaust amount.

  Also, for example, if the air pressure outside the building 1 is lower than the air pressure inside the building 1 before the doors 4 and 4 are opened, the doors 4 and 4 are opened simultaneously. The air inside the building 1 flows into the windbreak booth 10 through the passage port 13 and further flows out of the building 1. Therefore, when the air pressure outside the building 1 is lower than the air pressure inside the building 1 in this way, the control means 40 controls the drivers 32 and 38 to intervene in the external duct 25. The mounted opening / closing damper 31 is closed, and the opening / closing damper 37 interposed in the internal duct 26 is opened. As a result, the duct 22 is brought into communication with the inner exhaust port 35 from the inner duct 26. Such opening / closing operations of the opening / closing dampers 31 and 37 may be performed immediately before the opening / closing doors 4 and 4 are opened, or may be performed in advance before the opening / closing doors 4 and 4 are opened.

  Then, by starting the operation of the exhaust fan 20 at the same time as the opening and closing doors 4 and 4 are opened, the air inside the building 1 flowing into the windbreak booth 10 from the passage opening 13 Then, the air is sucked into the duct 22 and returned to the inside of the building 1 through the internal duct 26 which is the second flow path. Thus, the air that has entered the windbreak booth 10 from the inside of the building 1 through the passage opening 13 is forcibly sucked into the duct 22 by the exhaust fan 20 in the windbreak booth 10 before flowing out of the building 1. , It is returned to the inside of the building 1 through the internal duct 26 which is the second flow path. Thus, the air inside the building 1 is prevented from flowing out of the windbreak booth 10 to the outside of the building 1.

  When the air in the windbreak booth 10 is returned to the interior of the building 1 through the internal duct 26 as the second flow path, the control means 40 detects the windbreak booth 10 detected by the wind speed sensor 43. The operating amount of the exhaust fan 20 is adjusted by the inverter 21 based on the wind speed at the doorway 3 between the building and the outside of the building 1. That is, when the wind speed sensor 43 detects that air is flowing out of the windbreak booth 10 through the doorway 3 toward the outside of the building 1, the control means 40 causes the inverter 21 to discharge the exhaust amount of the exhaust fan 20. The drive is controlled to increase. As a result, the amount of exhaust from the windbreak booth 10 into the duct 22 is increased and the air pressure in the windbreak booth 10 is relatively lowered, so that air flows from the windbreak booth 10 toward the outside of the building 1. Will not flow out. Conversely, when the wind speed sensor 43 detects that air is flowing into the windbreak booth 10 from the outside of the building 1 through the doorway 3, the control means 40 causes the inverter 21 to discharge the exhaust amount of the exhaust fan 20. Control the drive to reduce. As a result, the amount of exhaust from the windbreak booth 10 into the duct 22 is reduced and the air pressure in the windbreak booth 10 is relatively increased, so that air flows from the outside of the building 1 into the windbreak booth 10. It will not be.

  Thus, when returning the air in the windbreak booth 10 to the inside of the building 1 through the internal duct 26 that is the second flow path, the windbreak booth 10 detected by the wind speed sensor 43 and the outside of the building 1 The control means 40 controls the displacement of the exhaust fan 20 so that the wind speed at the doorway 3 between the two is close to 0, thereby moving the air between the inside of the windbreak booth 10 and the outside of the building 1. It becomes possible to suppress. As a result, it is possible to more reliably suppress the air inside the building 1 from flowing out of the building 1 through the windbreak booth 10, and the air outside the building 1 blocks the windbreak booth 10. It becomes possible to more reliably suppress the entry into the building 1 through the passage. In this case as well, since the operating amount of the exhaust fan 20 is adjusted by the inverter 21, the control means 40 can control the exhaust fan 20 to an arbitrary exhaust amount.

  According to the distribution control system according to the embodiment of the present invention described above, the air conditioning efficiency can be improved by preventing the distribution of the internal and external air through the doorway 3 of the building 1. This distribution control system can be easily constructed by forming the windbreak booth 10 adjacent to the doorway 3 of the existing building 1. In that case, the space of the windbreak booth 10 may be small, and if the exhaust fan 20 is provided on the upper portion of the windbreak booth 10 as described in the embodiment, a person or the like is added to the exhaust fan 20 as a driving device. There is no worry of touching directly, and there is no worry of personal injury. In addition, by using the passage opening 13 that is always open on the inside of the windbreak booth 10, people and articles can enter and exit smoothly. In addition, since a high-speed airflow such as an air curtain does not occur in the windbreak booth 10, there is no fear of giving people discomfort.

  In addition, according to the distribution restraint system described in this embodiment, even when the doors 4 and 4 are closed, the exhaust fan 20 is operated to allow the air in the windbreak booth 10 to flow through the first flow path. It is also possible to ventilate the inside of the building 1 or the inside of the windbreak booth 10 by exhausting outside the building 1 through a certain external duct 25. That is, for example, when an increase in temperature inside the building 1 or in the windbreak booth 10 is detected, the exhaust fan 20 is operated to exhaust the air inside the windbreak booth 10 or inside the building 1. Then, the inside of the building 1 becomes negative pressure due to the exhaust, and the outside air is taken into the inside of the building 1 through an outside air intake (not shown) provided separately, thereby suppressing the temperature rise by introducing the outside air. It becomes possible.

  In the example shown in the figure, a windbreak booth 10 is formed at a position entering the inside of the building 1 adjacent to the doorway 3 that is opened and closed by the doors 4 and 4. It can also be formed in a fashion that protrudes outside the building 1 adjacent to the doorway 3 that is opened and closed by the opening and closing doors 4 and 4. Moreover, you may form the windbreak booth 10 in the form which goes over both the inner side and the outer side of the building 1 across the entrance / exit 3 of the building 1. In any case, when the windbreak booth 10 is formed adjacent to the doorway 3 of the building 1 and the doors 4 and 4 are opened and the doorway 3 is opened, the windbreak booth 10 and the outside of the building 1 The air to be circulated between the interiors is returned to the exterior of the building 1 from the windbreak booth 10 before entering the interior from the outside of the building 1, or the wind is removed before flowing from the interior of the building 1 to the outside. By returning from the booth 10 to the inside of the building 1, the circulation of the air inside and outside the building 1 may be suppressed.

  In addition, although the form which provided the opening-and-closing doors 4 and 4 which open and close the entrance / exit 3 was demonstrated, the opening-and-closing doors 4 and 4 were abbreviate | omitted, the entrance / exit 3 was always opened, and the air in the windbreak booth 10 was exhausted by the exhaust fan 20. It is conceivable to always exhaust. It is also effective to omit the doors 4 and 4 at places such as entrances and exits to subway platforms where there are many people entering and exiting and where it is desired to suppress the outflow of conditioned air. In addition, opening / closing doors 4, 4 are provided at the entrance / exit 3, and opening / closing doors are also provided at the passage opening 13 inside the windbreak booth 10, and the opening / closing doors 4, 4 provided at the entrance / exit 3 are provided at the passage opening 13. The air in the windbreak booth 10 may be exhausted by the exhaust fan 20 only when both the opening and closing doors are opened.

  Moreover, although the form which provided the detection part 42 which detects the atmospheric | air pressure inside the building 1 in the windbreak booth 10 was shown, if the detection part 42 is inside the building 1, it will not necessarily be in the windbreak booth 10. The detection unit 42 may be provided inside the building 1 (a position not inside the windbreak booth 10). Further, in the embodiment, an example is shown in which air is directly discharged from the inner exhaust port 35 toward the inside (indoor) of the building 1, but instead of the inner exhaust port 35, the air is provided inside the building 1. Alternatively, air may be returned to the interior of the building 1 using a return opening (not shown) provided in the lobby or machine room. In any case, dust may be removed by a filter when air is returned to the inside of the building 1. It is also possible to form an air curtain at the passage opening 13 on the inner side of the windbreak booth 10 by using the air returned from the windbreak booth 10 to the inside of the building 1. In addition, the open / close dampers 31 and 37 may be operated by using a fluid such as air as a drive source in addition to the motor drive.

  The distribution restraint system of the present invention can be applied to other buildings such as halls and warehouses in addition to business buildings such as office buildings and commercial buildings.

It is a longitudinal section showing an internal structure of a building provided with a distribution control system concerning an embodiment of the invention. It is a cross-sectional view of the same building as FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Outer wall 3 Entrance / exit 4 Opening / closing door 10 Windbreak booth 11 Side plate 12 Upper plate 13 Passage port 20 Exhaust fan 21 Inverter 22 Duct 25 External side duct 26 Internal side duct 30 External exhaust port 31 Open / close damper 32 Driver 35 Internal exhaust port 36 Wall surface 37 Opening and closing damper 38 Driver 40 Control means 41, 42 Air pressure detection unit 43, 44 Wind speed sensor

Claims (4)

A windbreak booth is formed adjacent to the entrance / exit of a building with an open / close door, and an exhaust fan is provided to exhaust the air in the windbreak booth.
Forming a first flow path for guiding exhaust of the exhaust fan to the outside of the building and a second flow path for guiding the exhaust to the inside of the building;
When the atmospheric pressure outside the building is higher than the internal atmospheric pressure, the air inside the windbreak booth is sent to the outside of the building through the first flow path so that the atmospheric pressure inside the building is higher than the external atmospheric pressure. A system for suppressing the flow of internal and external air in a building, characterized in that a control means is provided for controlling the air in the windbreak booth to be sent to the inside of the building through the second flow path when it is high.   When the air in the windbreak booth is sent to the outside of the building through the first flow path, the exhaust fan is controlled so that the wind speed between the windbreak booth and the inside of the building is close to zero. When the amount of exhaust is controlled and the air in the windbreak booth is sent to the inside of the building through the second flow path, the wind speed between the windbreak booth and the outside of the building is made close to zero. The system for suppressing the flow of internal and external air in a building according to claim 1, wherein the exhaust amount of the exhaust fan is controlled.   The internal / external air circulation control system according to claim 1, wherein the exhaust fan is operated only when the opening / closing door is opened.   In addition to operating the exhaust fan when the door is opened, the exhaust fan is operated to build the air in the windbreak booth through the first flow path when the door is closed. It is comprised so that it can send to the exterior of a thing, The distribution control system of the inside and outside air in the building of Claim 1 or 2 characterized by the above-mentioned.

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