JP5271681B2 - Ventilating facilities - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide ventilation equipment capable of keeping inner pressure of a building having an open ceiling space constant. <P>SOLUTION: The ventilation equipment includes an air supply mechanism 14 for supplying outside air to respective rooms 12, a first exhaust mechanism 15 for exhausting the air supplied to the rooms 12 to the open ceiling space 10, and a second exhaust mechanism 16 for exhausting the air in the open ceiling space 10 to the outside of the building 11. The second exhaust mechanism 16 comprises a second duct installed on a roof 23 of the open ceiling space 10 and a check valve damper for changing an opening area of an air flow passage of the second duct according to the inner pressure of the building 11. In the check valve damper, weight of a weight is adjusted to balance a set value of the inner pressure of the building 11 with the weight. When the inner pressure of the building 11 becomes larger than the set value, a swirl vane circles to a direction of opening the air flow passage against the weight of the weight to form an opening having a predetermined area at the air flow passage. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is provided in a building having a blow-off space, an air supply mechanism that supplies outdoor air to each room of the building, and an exhaust that exhausts the air supplied to each room by the air supply mechanism to the outside And a ventilation facility having a mechanism.

Middle / high-rise building with an atrium space that continues to the top floor in the center, with each room and common corridor arranged in a corridor around the atrium space, and openings for lighting and ventilation on the sides of the atrium space (See Patent Document 1). A roof that allows daylighting is installed in the upper part of the atrium. The openings are arranged at predetermined intervals for each floor from the ground to the top floor. In this building, lighting and ventilation from the ground to the top floor are performed through openings that open to the side of the atrium, so even if the building is taller, the habitability of each room on each floor Will not drop.
JP 2000-17856 A

  In a building with an atrium, air conditioning is used to supply outdoor air to each room while taking the air balance of each room, and the air is exhausted from each room to a corridor that leads to the atrium. The air is exhausted to the outside from the gallery installed on each side wall of the atrium space. The air supplied to each room is exhausted to the hallway by an exhaust fan (blower) attached to a duct extending from each room toward the hallway. The air in the blow-through space is exhausted to the outside by an exhaust fan attached to a duct connected to the gallery from the blow-through space. Moreover, the heat pool which accumulates in the upper part of the atrium space is released to the outside by natural ventilation from the skylight of the roof of the atrium space. Similarly, in the building disclosed in Patent Document 1, the air supplied to each room is exhausted from each room to the blow-off space, and the air is exhausted to the outside from the opening provided on the side of the blow-off space. The

  In a building having such an atrium space (including a building disclosed in Patent Document 1), the internal pressure depends on natural ventilation in the skylight of the roof of the atrium space, so the internal pressure of the building is kept constant. Not only can it not be guaranteed, but there is no guarantee that the internal pressure of the building can be kept positive with respect to the external pressure, and depending on the disturbance, a chimney effect phenomenon may occur. Further, in order to exhaust the air in the atrium space to the outside through the louver (opening), it is necessary to install a louver on each side wall of the atrium space, which requires labor and cost, and each side wall of the atrium space. If a louver is installed, the strength of the building will decrease, and the earthquake resistance and load resistance will decrease. Furthermore, natural ventilation in the skylights of the roof of the atrium space is left and left, and the heat accumulation that accumulates in the upper portion of the atrium space cannot be reliably eliminated.

  The objective of this invention is providing the ventilation equipment which can hold | maintain the internal pressure of the building which has an atrium space uniformly. Another object of the present invention is to provide a ventilation facility capable of constantly maintaining the internal pressure at a positive pressure. Moreover, it is not necessary to construct a gallery on each floor side wall of the atrium space, and to provide a ventilation facility that can prevent a decrease in the strength of the building. Furthermore, it is providing the ventilation equipment which can eliminate reliably the heat accumulation which accumulates in the upper part of a blow-off space.

  The premise of the present invention for solving the above-mentioned problems is that the building is provided with a building including each room and a blow-off space connected to each room, and an air supply mechanism and an air supply mechanism that supply outdoor air to each room. A ventilation facility having an exhaust mechanism for exhausting air supplied to each room to the outside of the building.

As a feature of the present invention based on the above premise, the exhaust mechanism has a first duct extending from the chambers toward the blow-off space, and a blower installed in the first duct and exhausting air supplied to each chamber to the blow-off space. And a second duct installed at the upper part of the atrium space and extending from the inside to the outside of the atrium space, and an opening area of the air flow path of the second duct according to the internal pressure of the building. have a check valve damper changing, the check valve damper, a rotary shaft rotatably mounted on the second duct, open swirl vane air flow path of the second duct is attached to the rotating shaft And a weight attached to the rotating shaft for turning the swirl vane in a direction to close the air flow path. In the check valve damper, the air supply mechanism supplies a certain amount of air. The internal pressure of the object is outside In the weight of the weight to form an opening having a predetermined area in the air flow path so as to be always positive pressure is adjusted for.

  As another example of the present invention, the check valve damper includes a stopper that prevents the swirling blade from further swirling when the air flow path of the second duct is closed by the swirling blade.

  As another example of the present invention, the second duct extends downward from the blow-off space outside the blow-through space.

  As another example of the present invention, a plurality of exhaust mechanisms are installed facing a plurality of directions in the upper part of the blow-through space.

  According to the ventilation equipment according to the present invention, the internal pressure of the building has the check valve damper that changes the opening area of the air flow path of the second duct installed in the upper part of the atrium space according to the internal pressure of the building. The air volume exhausted from the exhaust mechanism according to the internal pressure of the building is increased by increasing the opening area of the air flow path of the second duct when the air pressure is large, and by reducing the opening area of the air flow path when the internal pressure is low. Can be adjusted via a check valve damper. Ventilation equipment prevents excessive air from being exhausted to the outside of the building, prevents an extreme drop or increase in the internal pressure of a building with a ventilated space, and keeps the internal pressure of the building constant. be able to. Ventilation equipment eliminates the need to install a gallery on each floor side wall of the atrium space for air exhaust, and saves labor and cost. Strength reduction can be prevented. In this ventilation facility, air is exhausted to the outside from the air flow path of the second duct installed in the upper part of the blow-off space, so that the heat accumulation accumulated in the upper part of the blow-off space can be reliably eliminated.

  The check valve damper has a rotating shaft, a swirling blade that can open and close the air flow path, and a weight that swirls the swirling blade in a direction to close the air flow path, so that the set value of the internal pressure of the building and the weight are balanced. When the weight of the weight is adjusted and the internal pressure of the building becomes larger than the set value, the ventilation equipment that swirls the swirl blades in the direction to open the air flow path against the weight of the weight has the internal pressure of the building When the set value exceeds the set value, the swirl vane of the check valve damper opens the air flow path of the second duct, and when the internal pressure of the building becomes the set value or the internal pressure of the building becomes lower than the set value, the check Since the swirl vanes of the valve damper close the air flow path, excessive air is not exhausted to the outside of the building, and it is possible to prevent an extreme decrease or increase in the internal pressure of a building having a blow-off space. The internal pressure of the building can be held at the set value. In this ventilation system, when the internal pressure of the building is larger than the set value, the swirl vane of the check valve damper opens the air flow path of the second duct, so the internal pressure of the building does not increase more than necessary. The opening and closing of doors and windows will not be hindered, and the generation of drafts can be prevented.

  For ventilation equipment whose weight is adjusted so that the internal pressure of the building is always positive with respect to the external pressure, the set value of the internal pressure is determined so that the internal pressure of the building is always positive. If the actual internal pressure of the valve does not become larger than the set value, the swirl vane of the check valve damper does not open the air flow path of the second duct, so the internal pressure of the building having the blow-through space is maintained at the set value. In addition to being able to do this, the internal pressure of the building can be prevented from becoming a negative pressure, and the internal pressure can always be kept positive with respect to the external pressure. In this ventilation system, the internal pressure of the building is maintained at a positive pressure relative to the external pressure, so that outdoor air does not enter the building when the doors and windows are opened. Increase in load and temperature unevenness can be prevented. This ventilation facility can surely prevent the occurrence of a chimney effect phenomenon in a building having an atrium space.

  When the check valve damper is closed by the swirl vane and the air flow path of the second duct is closed, the ventilating equipment having a stopper that stops further swirling of the swirl vane Even if it tries to enter the interior of the building through the air flow path, when the air flow path of the second duct is closed by the swirl vane, further swirling of the swirl vane is prevented by the stopper No opening is formed in the air flow path of the second duct, and the backflow of external air from the second duct can be prevented.

  In the ventilation facility in which the second duct extends outward from the atrium space, the second duct serves as a roof, and rainwater does not enter the atrium space through the duct. Since the front end opening of the duct faces the lower side of the building, it is difficult for external air to enter from the front end opening of the duct, and the backflow of the external air from the duct can be prevented.

  Ventilation equipment in which multiple exhaust mechanisms are installed facing multiple directions in the upper part of the blow-off space is assumed that the exhaust of air from one exhaust mechanism becomes impossible due to the direction of strong wind blowing outside the building However, since air can be exhausted from other exhaust mechanisms other than the exhaust mechanism, the internal pressure of the building does not increase more than necessary, and the internal pressure of the building having the atrium space can be kept constant. it can.

  The details of the ventilation equipment according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a middle-rise or high-rise building 11 (building) shown as an example, and FIG. 2 is a view showing an example of a first exhaust mechanism 15 that exhausts air from a chamber 13 to a corridor 12. FIG. 3 is a diagram illustrating an example of the roof 23 of the atrium space 10, and FIG. 4 is a diagram illustrating an example of the second exhaust mechanism 16 that exhausts air from the atrium space 10 to the outside of the building 11. In FIG. 1, the outline inside the building 11 is shown, and the flow of air in the building 11 is indicated by arrows L1 to L3.

  The ventilation equipment is installed in a middle-rise or high-rise building 11 (building) having an atrium 10 (atrium). The atrium space 10 is formed in the center of the building 11. In the building 11, a hallway 12 surrounding the atrium space 10 is installed, and a plurality of chambers 13 are formed around the hallway 12. It should be noted that the building includes all those having a blow-through space, and the building is not limited to the middle-rise or high-rise building 11. Moreover, not only the building in which the atrium space 10 is formed in the center but also the building in which the atrium is made on the side. The room 13 includes not only an office but also those for all purposes such as a restaurant, a tea house, and a tenant shop.

  The ventilation equipment includes an air supply mechanism 14 that supplies outdoor air to the chambers 13, and a first exhaust mechanism that exhausts air supplied to the chambers 13 by the air supply mechanism 14 from the chambers 13 to the hallway 12. 15 and a second exhaust mechanism 16 that exhausts air from the blow-through space 10 to the outside of the building 11. Although the detailed illustration is omitted, the air supply mechanism 14 is provided with an air conditioner for supplying outdoor air to each room 13, takes a certain amount (set amount) of air from the outside of the building 11, and takes the air at a predetermined temperature and While maintaining the predetermined humidity, as indicated by an arrow L1 in FIG. 1, the air is individually supplied to the room 13 on each floor.

  The heat source system of the air supply mechanism 14 includes a turbo chiller + boiler, an absorption chiller + boiler, a cold / hot water generator, an air heat source heat pump, a water heat source heat pump, a packaged air conditioner, district cooling / heating, and total heat exchange. Can be used. Air conditioning system includes constant air volume single duct system, variable air volume single duct system, constant air volume double duct system, single duct reheat system, FC unit, duct combination system, induction unit system, radiant heating, package unit system These methods can be used.

  By adjusting the air supply output of the air supply mechanism 14, the amount of air supplied to each chamber 13 can be set or changed arbitrarily, and by adjusting the temperature and humidity in the air supply mechanism 14, The temperature and humidity of the air supplied to the chamber 13 can be set or changed arbitrarily. Increasing the air supply output of the air supply mechanism 14 increases the internal pressure of the building 11 (internal pressure of the building 11), and decreasing the air supply output of the air supply mechanism 14 decreases the internal pressure of the building 11. In the building 11, a certain amount of air is supplied to each chamber 13 via the air supply mechanism 14 so that the internal pressure is always positive with respect to the external pressure (external pressure of the building 11). It is also possible to set the amount of air supplied to each chamber 13 and supply different amounts of air to the chambers 13. It is also possible to set the humidity or temperature of air supplied to each chamber 13 and supply air of different humidity and temperature to these chambers 13.

  The first exhaust mechanism 15 is formed of a metal first duct 17 extending from the chamber 13 toward the hallway 12 (blow-through space 10) and an exhaust fan 18 (blower) installed in the first duct 17. . The first duct 17 is disposed in the ceiling 19 of the chamber 13 and the hallway 12, passes through the side wall 20 that separates the chamber 13 and the hallway 12, and connects the air inlet 21 and the hallway 12 installed in the ceiling panel of the chamber 13. It is connected to an exhaust port 22 installed in the ceiling panel. The first exhaust mechanism 15 is individually installed in the chambers 13.

  The exhaust fan 18 exhausts the air in the chamber 13 to the hallway 12 through the first duct 17. By adjusting the output of the exhaust fan 18, the amount of air exhausted from each chamber 13 can be arbitrarily set or changed. In the first exhaust mechanism 15, a certain amount (set amount) of outdoor air supplied to the chamber 13 by the air supply mechanism 14 is exhausted from the exhaust port 22 to the hallway 12. The air exhausted from each chamber 13 flows toward the blow-through space 10 through the hallway 12 as indicated by an arrow L2 in FIG. The amount of air exhausted from each chamber 13 can be set for each chamber 13, and different amounts of air can be exhausted from these chambers 13. In each chamber 13, a balance between air supply and exhaust (air balance) is achieved using the air supply mechanism 14 and the first exhaust mechanism 15.

  A plurality of the second exhaust mechanisms 16 are installed on the roof 23 of the atrium space 10 (the upper portion of the atrium space 10). The roof 23 of the atrium space 10 is formed in a quadrangular prism shape having a top panel 24 and first to fourth side wall panels 25 to 28. The exhaust mechanisms 16 are arranged on the side wall panels 25 to 28. Accordingly, one of the exhaust mechanisms 16 is disposed on the first side wall panel 25 and faces the east, one is disposed on the second side wall panel 26 and faces the south, and one is the third side wall panel. 27 is arranged on the west side, and one is arranged on the fourth side wall panel 28 and faces the north side. In FIG. 3, four second exhaust mechanisms 16 are illustrated, but the number of exhaust mechanisms 16 is not particularly limited, and the number can be arbitrarily determined. For example, only one second exhaust mechanism 16 may be provided, and the second exhaust mechanism 16 may be attached to any one of the side wall panels 25 to 28.

  As shown in FIG. 4, the second exhaust mechanism 16 includes a metal second duct 29 attached to the side wall panels 25 to 28 of the roof 23 of the atrium space 10, and a defense installed in the second duct 29. A bird net 30 and a check valve damper 31 are formed. The second duct 29 includes a bent portion 32 extending from the inside of the atrium space 10 to the outside, extending from the side wall panels 25 to 28 of the roof 23, and a straight portion 33 connected to the bent portion 32. The building 11 extends downward. The second duct 29 includes a base end opening 34 positioned on the side of the side wall panels 25 to 28 of the roof 23, a tip end opening 35 positioned outside the blow-off space 10, and an air flow path extending between the openings 34 and 35. 36. The straight portion 33 of the second duct 29 is formed in a quadrangular prism shape having first to fourth side walls 37 to 40 (see FIGS. 5 and 6). The bird net 30 is attached in the vicinity of the tip opening 35 of the second duct 29.

  5 and 6 are partially broken perspective views of the second duct 29 including the check valve damper 31, and FIGS. 7 and 8 are partially broken side views of the second duct 29 including the check valve damper 31. 5 and 7 show a state in which the air flow path 36 is closed by the swirl vane 43. In FIG. 6, the swirl vane 43 swirls to open the air flow path 36, and an opening 41 having a predetermined area is formed in the air flow path 36. FIG. 8 shows a state in which the swirl vane 43 is swung 90 degrees.

  The check valve damper 31 is installed in the air flow path 36 of the straight portion 33 extending between the base end opening 34 and the bird net 30, and the air flow path 36 of the second duct 29 according to the internal pressure of the building 11. The area of the opening 41 is changed. As shown in FIGS. 5 and 6, the check valve damper 31 is attached to the rotary shaft 42 rotatably attached to the second duct 29, the swirl vane 43 attached to the rotary shaft 42, and the rotary shaft 42. In addition, a weight 44 having a predetermined weight and a stopper 45 are provided. The rotating shaft 42 is rotatably attached to the first and third side walls 37 and 39 of the second duct 29. The rotating shaft 42 includes an inner portion 46 that extends inside the duct 29, an outer portion 47 that extends through the first side wall 37 and extends outside the duct 29, and a weight support bar 48 that extends radially outward from the outer portion 47. Have

  The swirl vane 43 is a rectangular metal plate having substantially the same area as the air flow path 36 and is attached to the inner portion 46 of the rotating shaft 42 so as to be swivelable. The swirl vane 43 swirls in a direction to close the air flow path 36 and a direction to open the flow path 36 by the rotation of the rotation shaft 42. The stopper 45 is made of a metal plate, is attached to the inside of the fourth side wall 40, and extends from the side wall 40 toward the air flow path 36. When the tip of the swirl vane 43 comes into contact with the stopper 45, the swirl of the swirl vane 43 stops.

  Therefore, even if air from the outside of the building 11 enters from the front opening 35 of the second duct 29 and tries to enter the escape space 10 that blows through the air flow path 36, the second duct 29 is caused by the swirl vanes 43. When the air flow path 36 of the second duct 28 is closed, further rotation of the swirl vane 43 is prevented by the stopper 45, and the swirl vane 43 does not swirl above the stopper 45. The opening 41 is not formed in the path 36, and the backflow of the external air from the duct 29 can be prevented.

  The weight support bar 48 is detachably attached to the tip of the outer portion 47 of the rotating shaft 42. A mounting ring 49 is attached to the proximal end portion of the weight support rod 48. In order to attach the support rod 48 to the rotating shaft 42, the ring 49 is fitted into the outer portion 47 of the rotating shaft 42, and then the ring 49 is fixed to the outer portion 47 with the screws 50. The support bar 48 can be removed from the outer portion 47 of the rotating shaft 42 by removing the screw 50 and removing the mounting ring 49 from the outer portion 47.

  The weight 44 is formed by forming a metal into a disk shape, and a circular insertion port is formed at the center thereof. The weight 44 is detachably attached to the weight support rod 48. Fixing rings 51 are disposed on both sides of the weight 44. In order to attach the weight 44 to the weight support bar 48, after one fixing ring 51 is fitted into the support bar 48, the insertion port of the weight 44 is inserted into the support bar 48, and the other fixing ring 51 is further attached to the support bar 48. 48, the weights 44 are sandwiched between the rings 51, and the rings 51 are fixed to the support bar 48 with screws 52. By changing the fixing position of the ring 51 on the support bar 48, the attachment position of the weight 44 on the support bar 48 can be adjusted. The ring 51 and the weight 44 can be removed from the support bar 48 by removing the screw 52 and extracting the ring 51 and the weight 44 from the support bar 48.

  In the state where the swirl vane 43 shown in FIG. 7 closes the air flow path 36 or the swirl vane 43 shown in FIG. 8 swivels about 90 degrees below the duct 29, the weight 44 passes through the center of the rotation shaft 42. Located to the left of the vertical line N. Therefore, the weight 44 turns the swirl blade 43 in the direction to close the air flow path 36 of the second duct 29 by its weight. The swirl vane 43 is constantly urged by the weight 44 in a direction to close the air flow path 36 of the second duct 29. In the building 11, since a constant amount of air is supplied from the air supply mechanism 14 so that the internal pressure is always positive with respect to the external pressure, the second duct is shown in FIG. The air flowing into the duct 29 from the base end opening 34 of the air 29 flows toward the upper surface of the swirl vane 43, and a predetermined pressing force acts on the swirl vane 43 by the air pressure. The air flowing toward the upper surface of the swirl vane 43 presses the swirl vane 43 so as to rotate the rotating shaft 42 in the clockwise direction indicated by the arrow L4 in FIGS.

  In the check valve damper 31, the weight of the weight 44 is adjusted so that the set value (air pressure) of the internal pressure of the building 11 and the weight 44 are balanced. The weight of the weight 44 is adjusted by at least one of a case where the weight 44 having a different weight is attached to the weight support rod 48 and a case where the fixing position of the weight 44 with respect to the support rod 48 is changed. In order to increase the set value of the internal pressure of the building 11, the weight of the weight 44 itself may be increased. As shown by an arrow L6 in FIG. You may shift to the direction to separate. In order to lower the set value of the internal pressure of the building 11, the weight of the weight 44 itself may be reduced. As shown by an arrow L7 in FIG. You may shift to the direction which adjoins. The weight 44 is adjusted so that the internal pressure of the building 11 is always positive with respect to the external pressure.

  When the internal pressure of the building 11 is larger than the weight of the weight 44 (the pressure obtained by converting the weight of the weight 44 into the internal pressure of the building 11), the swirl vane 43 opens the air flow path 36 against the weight of the weight 44. It turns (the rotating shaft 42 rotates in the clockwise direction). When the swirl vane 43 swirls in a direction to open the air flow path 36, an opening 41 having a predetermined area is formed in the air flow path 36, and air is exhausted outside the building 11 through the opening 41. Conversely, when the internal pressure of the building 11 is smaller than the weight 44, the swirl vane 43 swirls in the direction to close the air flow path 36 by the weight of the weight 44 (the rotating shaft 42 is shown by arrows L5 in FIGS. 7 and 8). Rotate counterclockwise as shown).

  FIG. 9 is a diagram illustrating an air flow when the air flow path 36 is closed, and FIG. 10 is a diagram illustrating an air flow when the air flow path 36 is opened. As shown in FIG. 1, the external air flows into the respective chambers 13 from the outside of the building 11, flows into the blow-through space 10 from the respective chambers 13 through the corridor 12, and then rises through the blow-off space 10 to form the second exhaust. Enter the second duct 29 of the mechanism 16. When the internal pressure (set value) of the building 11 is smaller than the mass of the weight 44, the closed state of the air flow path 36 is maintained by the blade 43 without the swirl blade 43 turning. When the closed state of the air flow path 36 is maintained, the air is blocked by the swirl vanes 43 and remains inside the building 11 as indicated by an arrow L3 in FIG.

  When the internal pressure of the building 11 gradually increases and the internal pressure becomes larger than the weight of the weight 44 (when the internal pressure becomes larger than the set value), the swirl vane 43 swirls in a direction to open the air flow path 36, and the air flow path 36 An opening 41 having a predetermined area is formed. When the opening 41 having a predetermined area is formed in the air flow path 36, air is exhausted to the outside of the building 11 through the opening 41 as shown by an arrow L3 in FIG. Simultaneously with the exhaust of air, the heat pool that accumulates in the upper part of the blow-through space 10 is released to the outside of the building 11.

  In the process in which air is exhausted from the blow-through space 10 to the outside of the building 11 through the second exhaust mechanism 16, the internal pressure of the building 11 gradually decreases. When the internal pressure of the building 11 decreases and the internal pressure becomes smaller than the weight of the weight 44 (when the internal pressure of the building 11 becomes a set value or the internal pressure of the building 11 becomes slightly smaller than the set value), the swirl vane 43 moves the air flow. It turns to the direction which closes the path | route 36, and the opening 41 of the air flow path 36 is obstruct | occluded. Moreover, the door and window of the building 11 are opened, and the air inside the building 11 is released from the door and window to the outside of the building 11, whereby the internal pressure of the building 11 gradually decreases, and the internal pressure is smaller than the weight of the weight 44. (When the internal pressure of the building 11 becomes a set value or when the internal pressure of the building 11 becomes slightly smaller than the set value), when the opening 41 of the air flow path 36 is in a closed state, the swirl vane 43 causes the air flow path. When the closed state of 36 is maintained and the air flow path 36 is in an open state, the opening 41 of the air flow path 36 is immediately closed by the swirl vanes 43.

  Since the ventilation equipment includes the check valve damper 31 that changes the area of the opening 41 of the air flow path 36 of the second duct 29 installed on the roof 23 of the atrium 10 according to the internal pressure of the building 11, the internal pressure of the building 11 Is larger than the weight of the weight 44, if the difference between the internal pressure of the building 11 and the weight of the weight 44 is large, the area of the opening 41 of the air flow path 36 of the second duct 29 is increased, and the internal pressure of the building 11 is increased. When the difference between the weight of the weight 44 and the weight 44 is small, the area of the opening 41 of the air flow path 36 is reduced to reduce the amount of air exhausted from the second exhaust mechanism 16 according to the internal pressure of the building 11. 31 can be adjusted.

  The ventilation equipment adjusts the weight of the weight 44 so that the set value of the internal pressure of the building 11 and the weight 44 are balanced, and when the internal pressure of the building 11 becomes larger than the set value, the swirl vane resists the weight of the weight 44. When the internal pressure of the building 11 becomes a set value or when the internal pressure of the building 11 becomes smaller than the set value, the swirl vane 43 is swung by the weight of the weight 44. 43 rotates in a direction to close the air flow path 36 and closes the air flow path 36, so that excessive air is not exhausted to the outside of the building 11, and the internal pressure of the building 11 having the blow-through space 10 is extreme. Can be prevented, and the internal pressure of the building 11 can be held at the set value.

  Since the weight of the weight 44 is adjusted so that the internal pressure of the building 11 is always positive, the ventilation equipment can prevent the internal pressure of the building 11 from becoming negative, and the door or window is opened. In addition, outdoor air does not enter the inside of the building 11, and an increase in air conditioning load and temperature unevenness inside the building 11 can be prevented, and a chimney effect phenomenon is reliably generated in the building 11 having the blow-off space 10. Can be prevented. The ventilation facility does not need to install a gallery on each floor side wall of the atrium space 10 for exhausting air, can save labor and cost, and is a building by installing a gallery on each side wall of the atrium space 10. 11 strength reduction can be prevented. In the ventilation facility, the heat pool accumulated in the upper part of the blow-off space 10 is exhausted to the outside from the air flow path 36 of the second duct 29 installed on the roof 23 of the blow-off space 10, so that the heat pool can be surely eliminated. it can.

  In the ventilation facility, since the second duct 29 extends toward the lower side of the blow-off space 10 outside the blow-off space 10, the second duct 29 becomes a roof, and rainwater enters the blow-through space 10 through the duct 29. In addition, since the front end opening 35 of the second duct 29 faces the lower side of the building 11, it is difficult for external air to enter from the front end opening 35 of the duct 29, and the backflow of the external air from the duct 29 can be prevented. In the ventilation facility, a plurality of second exhaust mechanisms 16 are installed in a plurality of directions on the roof 23 of the blow-off space 10, so that the air from one of the exhaust mechanisms 16 depends on the direction of the strong wind blowing outside the building 11. Even if the exhaust becomes impossible, the air can be exhausted from other exhaust mechanisms 16 other than the exhaust mechanism 16, so that the internal pressure of the building 11 does not increase more than necessary, and the building having the blow-off space 10 is provided. 11 internal pressure can be kept constant.

The side view of the middle-rise or high-rise building shown as an example. The figure which shows an example of a 1st exhaust mechanism. The figure which shows an example of the roof of a colonnade space. The figure which shows an example of a 2nd exhaust mechanism. The fragmentary perspective view of the 2nd duct containing a non-return valve damper. The fragmentary perspective view of the 2nd duct containing a non-return valve damper. The partially broken side view of the 2nd duct containing a non-return valve damper. The partially broken side view of the 2nd duct containing a non-return valve damper. The figure which shows the flow of air when an air flow path is closed. The figure which shows the flow of the air when an air flow path is open | released.

10 atrium space 11 building (building)
12 corridor 13 chamber 14 air supply mechanism 15 first exhaust mechanism 16 second exhaust mechanism 17 first duct 18 exhaust fan (blower)
23 Roof (top)
29 Second duct 31 Check valve damper 36 Air flow path 41 Opening 42 Rotating shaft 43 Swirling blade 44 Weight 45 Stopper 48 Weight support rod

Claims (4)

Provided in a building having each room and an atrium space connected to each room, an air supply mechanism for supplying outdoor air to each room, and air supplied to each room by the air supply mechanism In a ventilation facility having an exhaust mechanism for exhausting outside the object,
The exhaust mechanism includes a first duct extending from the chambers toward the blow-off space, a blower installed in the first duct and exhausting air supplied to the chambers into the blow-off space, and the blow-off space A second duct installed in the upper part of the space and extending from the inside to the outside of the atrium, and an opening area of an air flow path of the second duct installed in the second duct according to the internal pressure of the building have a check valve and damper to change the,
The check valve damper is attached to the rotary shaft, a rotary shaft that is rotatably attached to the second duct, a swirl blade that is attached to the rotary shaft and can open and close the air flow path of the second duct, and A weight for turning the swirl vane in a direction to close the air flow path,
In the check valve damper, an opening having a predetermined area is provided in the air flow path so that the internal pressure of the building is always positive with respect to the external pressure due to a constant amount of air supplied from the air supply mechanism. A ventilation facility characterized in that the weight of the weight is adjusted to form .   The ventilation equipment according to claim 1, wherein the check valve damper has a stopper that prevents further swirling of the swirl vane when the air flow path of the second duct is closed by the swirl vane.   The ventilation facility according to claim 2, wherein the second duct extends outward from the atrium space.   The ventilation facility according to claim 3, wherein a plurality of the exhaust mechanisms are installed facing a plurality of directions in an upper portion of the atrium space.

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