JP2007046373A - Double-skin structure and control method for its external wall openings in that double-skin structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To be able to reduce wind pressures all around inner wall surfaces in a structure like a high-storied building, etc. subjected to wind pressures. <P>SOLUTION: Among external circumferential walls around a structure on a plane, at least the wall sections having their opposite walls have a double-skin structure consisting of inner and outer walls 1 and 2, and openings that can open are formed at an interval along the circumference of outer walls 2 with the double-skin structure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a double skin structure and an outer wall in a double skin structure that can uniformly reduce the wind pressure generated on the inner wall surface in the circumferential direction in a structure affected by wind pressure such as a high-rise building. The present invention relates to a method for controlling an opening.

  When planning a natural ventilation system that introduces outside air in a high-rise building, we face the problem of how to handle the strong wind pressure experienced by the outer wall. When the building receives wind pressure from one direction, the windward side is positive and the leeward side is negative. However, if the building becomes taller, the wind speed increases both outdoors, positive and negative due to the increase in outdoor wind speed. Therefore, for example, even if ventilation / ventilation is attempted by opening / closing a window (opening), stable ventilation / ventilation cannot be expected. Therefore, the window is usually usually kept closed. If the window is opened under strong wind, there is a risk of damaging the resident by damaging the fixture due to sudden opening and closing of the internal door due to a gust of wind.

  The outer wall of the double skin structure, in which a part of the outer peripheral wall is composed of the inner wall and the outer wall, can be partially opened and closed to introduce the outside air between the inner wall and the inner wall is also partially to take the outside air indoors Although it can be opened and closed (see Patent Documents 1 to 3), if the opening of the outer peripheral wall that is on the leeward side is opened, the opening always becomes the outflow side of the air. The above-mentioned danger problem is not solved.

  For the problem of wind pressure on the windward side that is positive pressure, install a glass that is orthogonal to both glass between the outdoor side glass that is the outer wall of the double skin structure and the indoor side glass that is the inner wall. There is a method of sharing wind pressure between the two glasses by flowing the wind pressure received by the outer glass to the indoor glass (see Patent Document 4).

JP 2002-256737 A (Claim 1, paragraphs 0013 to 0014, FIGS. 1 and 3) JP 2003-253794 A (Claim 1, paragraphs 0023 to 0030, FIGS. 2 to 4) JP-A-2005-105732 (Claim 1, paragraphs 0047 to 0050, FIGS. 9 to 12) JP-A-2004-232360 (Claim 1, paragraphs 0011, 0021 to 0023, 0026 to 0028, 0035 to 0039, FIGS. 1 and 2)

  According to the method of Patent Document 4, the glass on the outdoor side and the glass on the indoor side are connected with the glass disposed between them, so that the wind pressure received by the glass on the outdoor side is transmitted to the glass on the indoor side, Wind pressure can be shared between the two glasses. However, this method only has an effect of reducing the burden on the glass on the outdoor side on the windward side, and does not reduce the wind pressure itself acting on the glass surface on the indoor side.

  In patent documents 1-3, although the opening part which can be opened and closed freely is formed in the glass on the outdoor side and the glass on the indoor side, since there is no relationship between the opening part on the leeward side and the opening part on the leeward side, The sudden opening of outside air on the windward side cannot be prevented by opening the opening.

  For example, as shown in FIG. 17, when the double skin is only on the leeward side of the outer peripheral wall that circulates around the plane, negative pressure always acts on the double skin as long as it is on the leeward side. Outside air cannot be introduced from the skin. Even when the double skin is only on the leeward side, if there is no outflow of air from the leeward side, the double skin will not be sufficiently introduced from the double skin, so the double skin exists on either the leeward side or the leeward side. Only air will not be introduced and exhausted.

  In view of the above background, the present invention proposes a double skin structure and a method for controlling the opening of the outer wall that can uniformly reduce the wind pressure generated on the inner wall surface in the circumferential direction.

  The double skin structure according to the first aspect of the present invention is the double skin structure in which at least the sections facing each other of the outer peripheral walls that circulate around the plane constitute a double skin having an inner wall and an outer wall, and the outer walls are spaced apart in the circumferential direction. It is a constituent requirement to have an opening that can be freely opened and closed. In order to uniformly reduce the wind pressure on the inner wall surface in the circumferential direction, it is desirable that the outer wall has openings uniformly in the circumferential direction.

  The distribution of the inner wall wind pressure due to the existence of the opening and its open / closed state in the structure where the outer wall has a double skin structure in the opposing section and the outer wall has an opening that can be opened and closed with a spacing in the circumferential direction. It can be grasped by looking at the distribution of wind pressure on the inner wall surface of a model that models a double skin structure, and it can be said that what is demonstrated from the model is also valid for the actual structure. The sections of the outer peripheral wall facing each other are the outer peripheral walls facing each other across the center on the plane, and the outer periphery facing in one direction when the planar shape of the structure is a straight line or the like. Point to the wall. The outer peripheral wall is not necessarily a flat surface but may be a curved surface.

  Therefore, against the model of a single skin compared with a double skin structure, and a model of a double skin structure with an opening that can be opened and closed on the entire circumference of the outer wall with a double skin structure. A wind tunnel experiment was conducted to investigate the change in the inner wall wind pressure due to the difference in the inner wall wind pressure distribution in the single skin structure and the opening and closing state of the outer wall opening of the double skin structure.

  FIG. 1 shows a single skin model A, and FIG. 2 shows a double skin structure model B. Model A and Model B are both 1/200 scale of the actual model, and the single skin model A is a cylindrical shape having wind pressure detection holes at a constant height (150 mm) from the bottom surface and spaced apart in the circumferential direction. The double-skin model B is a combination of an inner cylinder that is a single-skin model A and a cylindrical outer cylinder that has a slightly larger diameter. The inner cylinder has a diameter of 80 mm and a height of 210 mm, and the outer cylinder has a diameter of 100 mm and a height of 210 mm. The inner cylinder of the model B corresponds to the inner wall of the double skin structure, the outer cylinder corresponds to the outer wall, and the opening of the model B corresponds to the opening of the actual structure.

  As described above, the model A, B, and the inner cylinder, as shown in FIG. 1- (b), 16 numbered wind pressures on the plane at a height of 150 mm from the bottom surface at equal intervals in the circumferential direction. A detection hole is formed, and the outer cylinder of the model B is 11.25 degrees in the circumferential direction from the wind pressure detection hole of the inner cylinder with respect to the center (17) on the plane of the inner cylinder as shown in FIG. 16 holes 3 to 3 mm in diameter are formed at the shifted positions at the same height as the wind pressure detection hole of the inner cylinder on the plane at equal intervals in the circumferential direction. Since the wind pressure detection hole of the inner cylinder and the hole of the outer cylinder are at the same height, the formation position of the hole in the outer cylinder corresponds to the double skin layer in the structure. This double skin layer is separated from the upper and lower layers where the opening is not formed, including the inside of the inner cylinder.

  As shown in FIG. 2- (a), the opening of the outer cylinder and the wind pressure detection hole of the inner cylinder communicate with each other via a pressure chamber simulating a double skin sandwiched between the outer wall and the inner wall to detect the wind pressure of the inner cylinder. The hole is connected to a pressure gauge through a vinyl tube, and moves to the leeward side as it is to increase and equalize the wall pressure of the inner cylinder on the leeward side. The outside air that has flowed into the internal pressure chamber also flows out from a part of the opening of the outer cylinder to the outside of the outer cylinder. The opening of the outer cylinder can be freely opened and closed, and the distribution of the wind pressure on the inner wall surface depending on whether or not each opening is in an open state can be obtained by changing the opening position of each opening as shown in Table 1.

The wind pressure shown in Fig. 3 is used to measure the wind pressure applied to Models A and B. Models A and B are installed sideways in the measuring section of 300mm x 600mm and the uniform flow and turbulence are 0.1%. The wind speed of 10 m / s was given. The Re number when the diameter of the model is a representative dimension is 5.3 to 6.7 × 104. The results are shown in FIGS. FIG. 4 shows the experimental results of model i, and FIGS. 5 to 10 show the experimental results of model b. Table 1 shows experimental cases.

  For model A, three experiments (cases 1 to 3) were carried out by changing the wind speed, and for model B, the wind speed was changed in the same manner as in cases 1 to 3, with all openings open. Experiments (cases 4 to 6) and five experiments (cases 7 to 11) were performed by changing the position of the opening to be opened while keeping the wind speed constant.

  FIG. 4 shows the result of case 1. In this case, the inner wall wind pressure changes from positive pressure to negative pressure at the position of ± 35 degrees with respect to the wind direction, and takes the maximum negative value at the position of ± 68 degrees. I understand that. Cases 2 and 3 are the same as Case 1, and the distribution of the wind pressure on the inner wall surface completely overlaps with FIG. 4, which is consistent with the existing experimental results and proves that this experiment is correct. In cases 4 to 6, the inner wall surface wind pressure distributions almost completely overlapped. From this, it is considered that the wind speed does not greatly affect the wind pressure distribution on the inner wall surface. Therefore, in cases 7 to 11, the wind speed is kept constant at 10 m / s.

  The results of cases 4 to 6 are shown in FIG. Cases 5 and 6 differ from case 4 only in the wind speed, and the inner wall surface wind pressure distribution completely coincides with FIG. FIG. 5- (b) shows the open / closed state of the opening, the white circles indicate the open state, and the black circles after FIG. 6 (b) indicate the closed state. From the result of FIG. 5, it can be said that the open area of the opening used in the experiment was appropriate since the wind pressure distribution appeared uniform in the circumferential direction when the entire opening of the outer cylinder was open. If all the openings are open but the open area is not appropriate, the inflow of outside air on the windward side and the outflow of air on the leeward side are not smoothly performed, and the wind pressure distribution in the inner cylinder appears to be uniform. It is because it is thought that there is not. 6 to 10 showing the results of cases 7 to 11, (a) in each figure shows the wind pressure distribution on the inner peripheral surface of the inner cylinder.

  FIG. 6- (a) shows the result of Case 7. From the comparison with FIG. 5- (a), all the openings on the leeward side are closed while the half openings on the leeward side are kept open. It can be seen that the degree of negative pressure (absolute value) is halved compared to when the opening is opened.

  FIG. 7- (a) shows the result of Case 8. As shown here, when the opening on the leeward side and a part of the opening on both sides of the leeward side are closed, the inner wall wind pressure becomes positive, contrary to the case of FIGS. You can see that it appears.

  FIG. 8- (a) shows the result when one more opening on both sides of the windward side is opened as compared with the case of FIG. 7 as shown in FIG. 7 (b), and FIG. 9- (a) shows the result of FIG. The result when one of the openings on both sides of the windward side is opened is shown. In both cases, the inner wall wind pressure appears as a positive pressure as in the case of FIG. 7, but the absolute value of the pressure is smaller than in the case of FIG.

  The difference between FIG. 8 and FIG. 9 from FIG. 7 is whether the opening at the position that becomes the separation point of the wind (airflow) showing the maximum negative pressure in FIG. 4 is in an open state or a closed state. From the results shown in FIGS. 7 to 9, the opening from the windward side to the position where the wind is separated or the vicinity thereof is opened, and the other openings are closed to close the inner cylinder as shown in FIG. It can be seen that the wall surface wind pressure can be brought close to 0, or an optimal open / closed state can be selected. When the planar shape of the building is a square shape and one of the exit corners is on the windward side, the wind separation point appears at the exit corner between the windward and leeward sides.

  FIG. 10- (a) shows the result when the opening on the leeward side is closed and the opening on the leeward side is opened contrary to FIG. 6 as shown in (b). When the windward side opening is closed as shown here, negative pressure is generated all around the inner cylinder, and the absolute value of the negative pressure becomes larger than when there is no outer cylinder, and the benefit of wind pressure reduction by the outer cylinder is obtained. It turns out that it cannot be obtained.

  FIGS. 5 to 9 show results obtained from a model assuming a cylindrical building with a double skin composed of an inner wall and an outer wall on the entire circumference of the outer peripheral wall. From the results of FIGS. Of all the openings arranged around the outer peripheral surface of the object, the opening located on the windward side is opened to the position of the wind separation point, and the opening on the leeward side is closed, and the inner wall wind pressure generated in the inner cylinder Can be reduced over the entire circumference to approach 0.

  Further, from the results of FIGS. 7 to 9, if the leeward outer wall and the leeward outer wall have opening portions that can be freely opened and closed, the opening / closing states of the respective opening portions can be freely set. Since the same state as the opening in the case of FIG. 9 can be obtained, it can be said that the entire structure of the structure does not necessarily have a double skin, and at least the windward side and the leeward side may have a double skin. .

  Therefore, as described in claim 1, at least a section of the outer peripheral wall that is opposed to each other is a double skin composed of an inner wall and an outer wall, and the outer wall that constitutes the double skin is spaced apart in the circumferential direction and can be opened and closed freely. If it has a part, it is possible to reduce the inner wall wind pressure generated on the inner wall of the double skin. If the outer wall has an openable and closable opening, the opening located on the windward side of all the openings of the outer wall constituting the double skin as described in claim 2 is separated from the windward side. This is because it is possible to achieve the state shown in FIGS. 8 and 9 in which the point is opened up to the point or the vicinity thereof and the other openings are closed.

  According to claim 2, the outer wall constituting the double skin has an opening that can be opened and closed with an interval in the circumferential direction, and among the entire opening of the outer wall, the opening on the windward side Since it is in the same state as FIG. 8 and FIG. 9 by opening to the position where it becomes the peeling point or its vicinity and closing the other openings, the result similar to the result of FIG. 8 and FIG. 9 is obtained. It will be. In particular, if the entire circumference of the outer peripheral wall is a double skin structure as described in claim 8, a result close to (a) of FIGS. 8 and 9 is obtained. Further, in the first and second aspects, the wind pressure on the inner wall surface can be reduced over the entire circumference, thereby avoiding the danger of damaging the resident due to the sudden opening and closing of the internal door caused by the wind. Is possible.

  Also, for example, when the direction of wind acting on the double skin structure is specified in almost one direction from the location conditions or geographical conditions of the double skin structure, or when the wind in one direction is dominant, By forming an opening only on the windward side and opening the opening, the same result as in FIGS. 8 and 9 can be obtained, and the wind pressure generated on the inner wall can be reduced. In this case, since the opening in the section other than the windward side in the periphery on the plane is equivalent to being closed, the opening need not necessarily be formed in the section other than the windward side.

  Therefore, as described in claim 4, at least a section facing each other of the outer peripheral wall that circulates around the plane constitutes a double skin composed of the inner wall and the outer wall, and on the windward side of the outer wall constituting the double skin. If there is an opening that can be opened in a circumferential direction from the windward side to the position where the wind peels off or in the vicinity thereof, the wind direction can be determined under the condition that the wind direction is specified in almost one direction. Since the upper side is substantially constant, the wind pressure generated on the inner wall can be reduced. Also in this case, in order to reduce the wind pressure on the inner wall surface evenly in the circumferential direction, it is appropriate that the outer wall has openings uniformly in the circumferential direction.

  The model B obtained from the results of FIGS. 8 and 9 has an opening (wind pressure detection hole) for guiding the outside air taken into the double skin into the building with the inner wall spaced apart in the circumferential direction. If the inner wall which comprises a double skin has a space | interval in the circumferential direction and has the opening part which can be opened and closed like Claim 3 or Claim 2, Claim 1 or Claim 2 It is possible to take over the effect of. Similarly, in claim 4, as in claim 5, if the inner wall constituting the double skin has a circumferentially spaced opening and opening that can be opened and closed, the effect of claim 4 can be inherited. Is possible. In the cases of Claims 3 and 5, it is appropriate that the openings are equally provided in the circumferential direction. In the third and fifth aspects, since the outside air taken into the inner wall can be exhausted to the outside through the opening of the inner wall, introduction of the outside air on the windward side is promoted, and the efficiency of natural ventilation is improved. .

  In addition, in the double skin structure according to any one of claims 1 to 5, as long as the open area of the opening of the outer wall in the open state is freely adjustable, By changing the open area of the opening according to the magnitude of the upper wind pressure, it is possible to obtain the optimum inner wall surface wind pressure.

  Furthermore, if there is an exhaust pipe for guiding outside air taken in from the opening of the outer wall to the outside on the inner peripheral side of the inner wall as described in claim 7, air introduced indoors from the opening of the inner wall to the outside Since the exhaust is performed smoothly and at the same time, the outside air is smoothly introduced from the opening of the outer cylinder, the natural ventilation performance is improved, and the effect of equalizing the inner wall surface wind pressure is surely obtained. become. According to the seventh aspect of the present invention, it is possible to construct a natural ventilation system in a high-rise building by smoothly exhausting outside air introduced indoors to the outside.

  The models I and B used in the experiment are assumed to be cylindrical buildings. However, from the experimental results, the present invention has the effect of wind pressure such as tower buildings and columnar structures with large aspect ratios, including high-rise buildings. It can be said that it is effective for all structures that are strongly subject to.

  The positive equalization of the inner wall surface wind pressure includes, for example, an inner wall having an opening as described in claim 9 as a constituent feature, or according to any one of claims 5 to 8. In a double skin structure, it is realized by controlling the opening and closing of the opening in the outer wall so that the pressure in the inner wall constituting the double skin is equalized in the circumferential direction, for example, by closing the opening in the outer wall where the pressure is high. The

  As shown in FIGS. 5 and 10, in the state where the leeward opening of the outer cylinder is open, the pressure on the leeward side of the inner cylinder is large and becomes negative, as shown in FIGS. 6 to 9. Since the pressure on the leeward side of the inner cylinder can be reduced by closing the leeward side opening of the outer cylinder, the pressure on the inner wall surface can be controlled by controlling the opening and closing of the opening on the leeward outer wall where the pressure increases. Can be equalized in the circumferential direction.

  When performing the control of claim 9, the difference between the pressure on the inner wall surface and the pressure on the outer wall surface is notable because the pressure on the inner wall surface is different for each part, such as whether it is the leeward side or the leeward side. If it does not appear and the pressure on the outer wall surface does not increase relatively, the indoor pressure that can be kept almost constant as described in claim 10 is used as a reference, and the pressure on the inner wall becomes the reference. If the opening / closing of the opening in the outer wall where the difference between the pressure on the outer wall and the indoor pressure is large is controlled so that the difference from the indoor pressure is equalized in the circumferential direction, the inner wall wind pressure is equalized. It becomes possible to improve the accuracy of this.

  As described above, in the present invention, of the outer peripheral wall that circulates around the plane, at least the sections facing each other constitute a double skin composed of the inner wall and the outer wall, and the outer wall can be opened and closed with an interval in the circumferential direction. Therefore, from the experimental results of the model, the opening located on the windward side is opened from the windward side to the position where it becomes the separation point of the wind or its vicinity, and the other openings are closed, The wall surface wind pressure can be reduced over the entire circumference.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIGS. 11 to 13 show the introduction of the outside air and the flow of the exhaust gas through the double skin composed of the inner wall 1 and the outer wall 2 when the planar shape of the double skin structure is a square shape.

  FIG. 11- (a) shows the flow of the outside air in the horizontal direction when the entire circumference of the outer peripheral wall is a double skin. Here, assuming that the direction of one of the projecting corners on the plane is the windward side, the opening in the outer wall 2 in the two directions on the windward side is fully opened, and the opening in the outer wall 2 in the two directions on the leeward side is opened. Close the openings in some sections on the leeward side from or near the position where the wind peels, and open only some of the openings near the exit corner farthest from the windward side. Yes. In this case, outside air is taken into the double skin space from the opening of the outer wall 2 on the leeward side, then passes through the indoor space on the inner peripheral side of the inner wall 1, passes through the space of the double skin on the leeward side, and the opening of the outer wall 2. Exhausted to the outdoors.

  In addition to the opening for introducing the outside air, the outer wall 2 constituting the double skin has an opening for exhausting the air whose temperature has increased inside the double skin and suppressing the temperature increase inside the double skin. It is formed.

  FIG. 11- (b) shows the flow of outside air when a section facing in one direction of the entire circumference is a double skin. Here, it is assumed that the direction of one of the projecting corners on the plane is the windward side, but all the openings of the outer wall 2 located on the windward side are opened, and the wind of the outer wall 2 on the leeward side is opened. A part of the opening near the protruding corner farthest from the upper side is closed, and the other opening is opened. Outside air passes through the double-skin space and the indoor space on the leeward side, and is exhausted to the outside through the double-skin space on the leeward side.

  FIGS. 12- (a) and (b) show vertical ventilation. When the entire circumference of the outer peripheral wall is a double skin, it is taken from the opening of the outer wall 2 into the inner peripheral side of the inner wall 1, that is, the indoor space. The flow of outside air in the case of having the exhaust pipe 3 for guiding outside air to the outside is shown. The exhaust tube 3 is continuous from at least a double skin layer to the outside such as a rooftop, but is not necessarily cylindrical, and may be a space like an atrium. The formation position of the double skin layer in the structure is not limited, and the double skin layer is formed only on a certain layer or on a layer above a certain layer, or on all layers. When the structure has the exhaust pipe 3, the outside air taken indoors is discharged from the exhaust pipe 3 to the outside, and therefore it is not necessary to open the opening in the outer wall 2 on the leeward side. In the portion of the exhaust tube 3 that communicates with the outside, exhaust is performed by the suction force due to the negative pressure of the wind passing through the outside.

  FIG. 13 shows a case where the exhaust pipe 3 for guiding the outside air taken from the opening of the outer wall 2 to the outside is provided on the inner peripheral side of the inner wall 1 when a section facing in one direction of the entire circumference is a double skin. Shows the flow of outside air. In this case as well, it is not always necessary to open the opening of the leeward outer wall 2 as in FIG. 12- (a), but when the opening is opened, for example, the outside air when discharged from the exhaust tube 3 is used. When the suction force increases, there is a possibility that outside air may be taken in from an opening on the leeward side that should be on the exhaust side as illustrated.

  FIG. 14 shows a specific example of a ventilating system that effectively uses a double skin. In order to establish a stable ventilation system, it is appropriate to reduce the absolute value of the inner wall surface wind pressure so that the inner wall surface wind pressure is not affected by a sudden change in the wind speed. For this purpose, it is desirable that the opening of the inner wall 1 can be freely opened and closed by a resident's hand, and the opening and closing of the opening of the outer wall 2 can be automatically controlled according to the wind direction, wind speed, and the like.

  As shown in FIG. 14, the most effective system for automatically opening and closing the opening of the outer wall 2 surrounds the entire circumference of the building with a double skin, and measures the wind direction and wind speed with a rooftop wind speed and wind direction meter, The pressure on the outer wall 2 and the inner wall 1 of the representative floor (which may extend over several floors) is detected by a pressure gauge 4 such as a pressure sensor, and the opening and closing of the opening of the outer wall 2 is controlled based on these measured and detected values. It is to be. As shown in the figure, when the projecting corner on the plane of the building is on the windward side, the opening on the leeward side of the outer wall 2 has a larger negative pressure than the boundary with the leeward side that becomes the separation point of the wind (airflow). Therefore (FIG. 4), it is necessary to control the opening to be closed.

FIG. 15 shows an arrangement example of the pressure gauges 4 on the outer wall 2 and the inner wall 1 when the box-shaped building shown in FIG. 14 is replaced with a cylindrical shape. In the figure, O _i indicates the position of the pressure gauge 4 on the outer wall 2, and I _i indicates the position of the pressure gauge 4 on the inner wall 1. Here, the pressure difference (ΔP _Oi ) between the outer wall 2 surface and the building is calculated from the measured value of the pressure gauge 4 on the outer wall 2 on the basis of the atmospheric pressure in the building, and the inner wall 1 is calculated from the measured value of the pressure gauge 4 on the inner wall 1. A pressure difference (ΔP _Ii ) between the surface and the building is calculated. From this calculated value, the opening / closing of the opening of the outer wall 2 is controlled so as to close the opening of the portion having a large negative value among the calculated values of all ΔP _Oi so that ΔP _Ii is equalized in the circumferential direction. The The opening of the outer wall 2 is opened and closed by a driving means such as an actuator.

The reason _why the opening of the portion having a large negative value among ΔP _Oi is closed is that when the opening on the leeward side is open, the pressure on the inner wall on the leeward side is negative, and the absolute value thereof increases. (FIGS. 5 and 10), the absolute value of the pressure on the inner wall on the leeward side can be reduced by closing the opening on the inner wall on the leeward side (FIGS. 6 to 9).

  In FIG. 15, in order to reduce errors due to variations in pressure values at each part of the outer wall 2 and increase the accuracy of the pressure values, the pressures of the inner wall 1 and the outer wall 2 and the pressure in the building are calculated. However, it is not always necessary to use the atmospheric pressure in the building as a reference, and another reference pressure may be prepared.

FIG. 16 is a block diagram showing an example of control in FIG. The pressure difference between the outer wall 2 surface calculated from the measured value of the pressure gauge 4 on the outer wall 2 and the indoor pressure difference (ΔP _Oi ), and the pressure difference between the inner wall 1 surface calculated from the measured value of the pressure gauge 4 of the inner wall 1 and the indoor pressure difference (ΔP _Ii ) is sent to computing means such as a personal computer (PC), and the above-mentioned command is transmitted from the computing means to the driving means. The opening of the outer wall 2 is opened and closed based on the operation of the driving means, and outside air is introduced when the opening is opened, and outdoor-to-indoor-to-outdoor ventilation is ensured. Changes in indoor temperature / humidity caused by the outside air introduced indoors, wind speed when the outside air passes through the opening, etc. are fed back to the calculation means, and the following data (ΔP _Oi , ΔP _Ii ) is obtained every moment. Is reflected in the directive.

(A) is the elevation which showed the model which modeled the single skin structure, (b) is a top view. (A) is the elevation which showed the model which modeled the double skin structure, (b) is a top view. (A) is the top view which showed the wind tunnel used for experiment, (b) is an elevation view. It is the top view which showed distribution of the inner wall surface wind pressure in the model of a single skin. (A) is the top view which showed distribution of the inner wall surface wind pressure in the model of a double skin at the time of opening all the openings of an outer cylinder, (b) is the top view which showed the open position of the opening of an outer cylinder. . (A) is a plan view showing the distribution of the wind pressure on the inner wall surface of the double skin model when the windward opening of the outer cylinder is opened, and (b) is a plan view showing the opening position of the opening of the outer cylinder. It is. (A) is a plan view showing the distribution of the wind pressure on the inner wall surface in a double skin model when a part of the windward opening of the outer cylinder is opened, and (b) shows the opening position of the opening of the outer cylinder. FIG. (A) is a plan view showing the distribution of wind pressure on the inner wall surface in a double skin model when the opening up to the separation point on the windward side of the outer cylinder is opened, (b) is the opening position of the opening of the outer cylinder. It is the shown top view. (A) is a plan view showing the distribution of wind pressure on the inner wall surface in a double skin model when the opening up to the separation point on the windward side of the outer cylinder is opened, (b) is the opening position of the opening of the outer cylinder. It is the shown top view. (A) is a plan view showing the distribution of wind pressure on the inner wall surface in a double skin model when the leeward opening of the outer cylinder is opened and the leeward opening is closed, and (b) is the opening of the outer cylinder. It is the top view which showed the open position. (A) is a plan view showing a flow of outside air when the entire circumference is a double skin, and (b) is a plan view showing a flow of outside air when a surface facing in one direction is a double skin. (A) is a plan view showing the flow of outside air when the entire circumference is a double skin and has an exhaust pipe on the inner circumference side of the inner wall, and (b) is a perspective view. It is the top view which showed the flow of the external air in the case of having an exhaust pipe on the inner peripheral side of the inner wall when the surface facing in one direction is a double skin. It is the conceptual diagram which showed the specific example of the ventilation system which utilized the double skin effectively. It is the top view which showed the example of arrangement | positioning of the pressure gauge in a cylindrical building in the ventilation ventilation system shown in FIG. It is the block which showed the example of control for equalizing the pressure difference of an inner wall surface and indoors. It is the schematic which showed the flow of the air in case a double skin exists only in the leeward side.

Explanation of symbols

1 ……… Inner wall 2 ……… Outer wall 3 ……… Exhaust tube 4 ……… Pressure gauge

Claims (10)

  Among the outer peripheral walls that circulate around the plane, at least the sections facing each other constitute a double skin composed of an inner wall and an outer wall, and the outer wall has an opening that can be opened and closed with an interval in the circumferential direction. A double skin structure.   Of all the openings of the outer wall, the opening located on the windward side is open from the windward side to the position where the wind is peeled off or in the vicinity thereof, and the other openings are closed. The double skin structure according to claim 1.   The double skin structure according to claim 1, wherein the inner wall has an opening that can be opened and closed with a space in the circumferential direction.   Of the outer peripheral walls that circulate around the plane, at least the sections facing each other constitute a double skin consisting of an inner wall and an outer wall, on the windward side of the outer wall, the position where the wind separation point from the windward side, or the vicinity thereof A double skin structure characterized by having an opening that can be opened at a distance in the circumferential direction.   The double skin structure according to claim 4, wherein the inner wall has an opening that can be opened and closed at an interval in the circumferential direction.   The double skin structure according to any one of claims 1 to 5, wherein an opening area of the opening of the outer wall in an open state is freely adjustable.   The double skin structure according to any one of claims 1 to 6, further comprising an exhaust pipe that guides outside air taken from an opening of the outer wall to the outside on an inner peripheral side of the inner wall.   The double skin structure according to any one of claims 1 to 7, wherein the entire circumference of the outer peripheral wall constitutes a double skin comprising an inner wall and an outer wall.   The double skin structure according to any one of claims 3 and 5 to 8, wherein the double skin structure controls the opening and closing of the opening in the outer wall so that the pressure in the inner wall is equalized in the circumferential direction. A method for controlling an outer wall opening in a skin structure. 9. The double skin structure according to claim 3, or a pressure in the outer wall so that a difference between a pressure in the inner wall and an indoor pressure is equalized in a circumferential direction. A method for controlling an opening of an outer wall in a double skin structure, which controls opening and closing of the opening in an outer wall having a large difference between the indoor pressure and the indoor pressure.