WO2008066334A1

WO2008066334A1 - Shelter and fire door of the shelter

Info

Publication number: WO2008066334A1
Application number: PCT/KR2007/006090
Authority: WO
Inventors: Yang Sik Choi
Original assignee: Yang Sik Choi
Priority date: 2006-12-01
Filing date: 2007-11-29
Publication date: 2008-06-05
Also published as: KR100770825B1

Abstract

The present invention disclosed herein provides a shelter and an entrance thereof. According to the present invention, an entrance of a shelter comprises a fire door formed of fire protection material and a fire door frame covering an outer circumferenceof the fire door. The fire door frame includes more than two compressed-air jet nozzles and high-pressure water jet nozzles which respectively inject a compressed air and a high pressure water in a front direction toward the fire door. In case that fire happens, smoke or noxious air from the outside is not penetrated into the shelter, so that the public can be safely evacuated from the smoke or noxious in the shelter.

Description

Description SHELTER AND FIRE DOOR OF THE SHELTER

Technical Field

[1] The present invention relates to a shelter and an entrance thereof, more particularly, a shelter capable of providing fresh air to an internal space thereof by including a compressed-air jet nozzle and a high-pressure water jet nozzle along a fire wall, and an entrance preventing an externalsmoke or noxious air from being supplied to the shelter employing a compressed-air jet nozzle and a high-pressure water jet nozzle along a fire door frame thereof, capable of extinguishing fire when fire happens in an internal space of the shelter, and capable of cooling the fire wall to constantly maintaining temperature in the shelter by employing a compressed-air jet nozzle and a high- pressure water jet nozzle, which inject a compressed air and a high pressure water in the fire wall. Background Art

[2] In the event that fire occurs, there is no other choice except that the public should be evacuated from place in which fire occurs.

[3] In order to ensure adequate fire protection, various methods have been suggested.

For instance, a loss of lives is minimized by restricting noxious gas, smoke, or the like by installing fire protection material into wall in itself. In addition, a smoke protection layer or a fire door is frequently adopted.

[4] However, there are many problems such that when fire occurs in a high-rise building, the public should be waiting with wearing a gas mask, so that there is high possibility of live loss. Disclosure of Invention Technical Problem

[5] Accordingly, it is an object of the present invention to provide a shelter capable of providing fresh air to an internal space thereof by including a compressed-air jet nozzle and a high-pressure water jet nozzle along a fire wall, and an entrance preventing an external smoke or noxious air from being supplied to the shelter employing a compressed-air jet nozzle and a high-pressure water jet nozzle along a fire door frame thereof.

[6] It is another object of the present invention to provide a shelter capable of extinguishing fire when fire happens in an internal space of the shelter.

[7] It is still another object of the present invention provide a capable of cooling the fire wall to constantly maintaining temperature in the shelter by employing a compressed- air jet nozzle and a high-pressure water jet nozzle, which inject a compressed air and a high pressure water in the fire wall. Technical Solution

[8] Embodiments of the present invention provide an entrance of a shelter comprising a fire door formed of fire protection material and a fire door frame covering an outer circumference of the fire door. The fire door frame includes more than two compressed- air jet nozzles and high-pressure water jet nozzles which respectively inject a compressed air and a high pressure water in a front direction toward the fire door.

[9] In some embodiments, the compressed-air jet nozzle is disposed along a first outer circumference covering the shelter, and the high-pressure water jet nozzleis disposed along a second outer circumference covering the first outer circumference.

[10] Embodiments of the present invention provide an entrance of a shelter comprising: an external fire door formed of fire protection material; an internal fire door apart from the external fire door as far as a predetermined distance and formed of fire protection material; and a double fire door frame covering outer circumferences of the external and internal fire doors and sealing a space therebetween. More than two compressed- air jet nozzles and a high-pressure water jet nozzles are disposed at a region of the doublefire door frame covering the external fire door and exposed to the outside. The compressed-air jet nozzle and the high-pressure water jet nozzle respectively inject a compressed air and a high pressure water supplied from the outside in a front direction of the external fire door. A projection is disposed at a region right short of a point fastening the internal fire door of the double fire door frame. The projection includes more than two compressed-air jet nozzles for injecting a compressed air supplied from the outside in a front direction toward the external fire door.

[11] In some embodiments, the compressed-air jet nozzle along the outer circumference of the external fire door is disposed along a first outer circumference covering the external fire door, and the high-pressure water jet nozzle is disposed along a second outer circumference covering the first outer circumference.

[12] In other embodiments, a vent switch for connecting an internal space between the external and internal fire doors and an outer space of the external fire door is disposed in the doublefire door frame.

[13] In further embodiments, the vent switch is operated to discharge air of the internal space to the outside and then eliminate a noxious air of the internal space supplied from the outside when a pressure of the internal space is higher that of the external.

[14] In other embodiments, the external and internal fire doors are opened toward an ou- terdirection of the internal space.

[15] Embodiments of the present invention provide a shelter comprising: a fire wall for sealing an internal space of a shelter; an entrance located at a predetermined regionof the fire wall and where the public are evacuated via the entrance; and a compressed air and high pressure water control box located at a predetermined region of the internal space of the shelter and for controlling a compressed air and a high pressure water supplied from the outside. The entrance comprises: an external fire door formed of fire protection material; an internal fire door apart from the external fire door as far as a predetermined distance and formed of fire protection material; and a double fire door frame covering outer circumferences of the external and internal fire doors and sealing a space therebetween. More than two compressed-air jet nozzles and high-pressure water jet nozzles are disposed at a region of the double fire door frame covering the external fire door and exposed to the outside. The compressed-air jet nozzle and the high-pressure water jet nozzle respectively inject a compressed air and a high pressure water supplied from the compressed air and high pressurewater control box in a front direction of the external fire door. A projection is disposed at a region right short of a point fastening theinternal fire door of the double fire door frame. The projection includes more than two a compressed-air jet nozzle for injecting a compressed air supplied from the compressed air and high pressure water control box in a front direction toward the external fire door. A compressed air supply pipe path and a high pressure watersupply pipe path are regularly laid which connected to the compressed air and high pressure watercontrol box and respectively having a compressed-air jet nozzle and a high-pressure water jet nozzlein the fire wall. A compressed air supply pipe path and a high pressure watersupply pipe path include a compressed-air jet nozzle for injecting a compressed air to an internal space of the shelter and a high- pressure water jet nozzle for injecting a high pressurewater on a surface of the fire wall, respectively.

[16] In some embodiments, a drain is further included. The drain discharges a compressed air and a high pressurewater injected in the fire wall, and a high pressure water injected on the surface of the fire wall.

[17] In other embodiments, a vent switch is further included. The vent switch connects the internal space and the external space of the shelter

[18] In further embodiments, the vent switch is operated to discharge air of the internal space to the outside and then eliminate a noxious air of the internal space supplied from the outside when a pressure of the internal space is higher that of the external.

Advantageous Effects

[19] According to the shelter and the entrance thereof, outer smoke and noxious air can beprevented from being inlet into the shelter and the entrance thereof.

[20] Additionally, even if a little of smoke and noxious air is inlet, they are discharged to the outside by the compressed air and the high pressure water injected from the compressed-air jet nozzle and the high-pressure water jet nozzle.

[21] Furthermore, even if external temperature rises, it is possible for internal temperature not to be risen by including the compressed-air jet nozzle and the high- pressure water jet nozzle, which is able to restrict temperature of the shelter to be raised.

[22] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention. Brief Description of the Drawings

[23] FIGS. 1 to 3 are plane views and cross-sectional views showing an entrance of a shelter a perspective view according to an embodiment of the present invention.

[24] FIGS. 4 to 6 are a perspective view, a partial perspective view, and a cross-sectional view showing an entrance of a shelter according to another embodiment of the present invention.

[25] FIG. 7 is a disassembling view showing a region of an external fire door frame covering an external fire door exposed to the outside.

[26] FIG. 8 is a disassembling perspective view showing a projection of an internal fire door.

[27] FIG. 10 is a partial perspective view showing a shelter according to an embodiment of the present invention.

[28] FIG. 11 is a disassembling view showing a fire wall frame.

[29] FIG. 12 is vertical cross-sectional view of a fire wall.

[30] FIG. 13 is a construction view of a compressed air and high pressure water control box.

[31] FIG. 14 is a partial perspective view showing a vent switch disposed on a fire wall.

[32] FIG. 15 is a perspective view showing a construction that a compressed air and a high pressurewater are supplied to an external compressed air supplying pipe path and an external high pressurewater supplying pipe path. Best Mode for Carrying Out the Invention

[33] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The present invention is not limited to the embodiments of the present invention but can be embodied in other various forms. The same reference numerals designate the same parts in the present invention.

[34] FIGS. 1 to 3 are plane views and cross-sectional views showing an entrance of a shelter a perspective view according to an embodiment of the present invention.

[35] Referring to FIGS. 1 to 3, an entrance 100 of a shelter according to an embodiment of the present invention 100 includes a fire door 110 and a fire wall frame 120.

[36] The entrance 100 is a door of a shelter where the public can be evacuated from fire, and an internal space of the entrance 100 is equivalent to a shelter. The shelter is applicable to a region sealed from the outside.

[37] The entrance 100 includes the fire door 110 and the fire door frame 120.

[38] The fire door 110 is formed of fire protection material. In addition, the fire door 110 may be formed of metallic material such as an iron plate or a composition formed of an iron plate and fireproof ceramic insulating material filled therein.

[39] The fire door frame 120 covers an outside of the fire door 110.

[40] The fire door frame 120 is fastened with the fire door 110. The fire door frame 120 has more than two compressed-air jet nozzle 122 and a high-pressure water jet nozzle, which inject compressed air and high pressurewater in order to prevent external smoke or noxious air from being inlet when the public take a shelter using the fire door 110.

[41] At this time, the compressed-air jet nozzle 122 and the high-pressure water jet nozzle 124 inject compressed air and high pressure water toward a front direction of the fire door 110. The compressed-air jet nozzlel22 is disposed along a first outer circumference covering the fire door 110. The high-pressure water jet nozzle 124 is disposed along a second outer circumference covering the fire door 110 and the first outer circumference 132.

[42] As shown in FIG. 3, there is a step difference between ends including the first and second outer circumferences 132 and 134, and an end contact with the fire door 110, which comprise the fire door frame 120.

[43] A plurality of the compressed-air jet nozzles 122 and the high-pressure water jet nozzle 124 may be included, respectively. As shown in FIGS. 1 and 2, the compressed- air jet nozzles 122 and the high-pressure water jet nozzle 124 may cover all or both sides of the outer circumference of the fire door 110.

[44] The difference of the fire door 110 and the fire door frame 120 is that there exists a vent switch 140, as shown in FIGS. 1 and 2. In FIG. 2, the vent switch 140 is disposed on the second outer circumference 134 in comparison with FIG. 1

[45] The vent switch 140 performs a function to discharge internal air to the outside if internal airpressure of the shelter becomes high. At this case, outer air is not penetrated into an internal space, and internal air is discharged to the outside. Most shelters are sealed, so that an internal pressure of thereof is high. Accordingly, there is a high possibility that the fire door is not easily closed owing to pressure difference of the shelter. In this case, the vent switch 140 is applicable as occasion demands. Also, the vent switch 140 may be installed on the first outer circumference 132 or a pre- determined position of the fire door 110.

[46] The compressed-air jet nozzle 122 and the high-pressure water jet nozzle 124 are connected a compressed air supplying pipe path 150 and a high pressurewater supplying pipe path 160, which supply compressed air and high pressure water from the outside, respectively.

[47] The compressed air supplyingpipe path 150 and the high pressure water supplying pipe path 160 perform a function to supply compressed air and high pressure water from the outside to the compressed-air jet nozzle 122 and the high-pressure water jet nozzle 124. In addition, the compressed air supplyingpipe path 150 and the high pressure water supplying pipe path 160 are directly connected an external a compressed-air storing tank and a high-pressure water storing tank to supply compressed air and high pressure water or the compressing air and high-pressure water control box connected to an external compressed-air storing tank and high-pressure water storing tank and the compressed air supplying pipe path 150 and the high pressure water supplying pipe path 160 are connected the compressing air and high- pressure water control box to supply compressed air and high pressure water. Mode for the Invention

[48] FIGS. 4 to 6 are a perspective view, a partial perspective view, and a cross-sectional view showing an entrance of a shelter according to another embodiment of the present invention.

[49] Referring to FIGS. 4 to 6, an entrance 200 of a shelter according to another embodiment of the present invention includes an external fire wall 210, an internal 220, and a double fire door frame 230.

[50] In this case, the entrance 200 performs a function to classify an external space, an entrance space being an internalspace between an internal fire door 220 and an external fire door 210, and an internal space of a shelter. In other words, the external fire door 210 separates the external space and the entrance space to prevent smoke or noxious air from being inlet the outside to the entrance space. The internal fire door 220 separates the entrance space and the internal space of the shelter to prevent the internal space of the shelter from directly being connected to the external space. As a result, even if a little of smoke or noxious air is inlet into the entrance space, it is not completely inlet into the internal space of the shelter.

[51] In this case, the internal and external fire doors 210 and 220 have the same construction as the fire door 100 of FIGS. 1 to 3 (there is a difference in that the size of the internal fire door 220 is smaller than that of the external fire door 210). That is, the external and internal fire doors 210 and 220 are formed of metallic material such as an iron plate being fire protection material and fireproof ceramic insulating material filled therein.

[52] Additionally, the external and internal fire doors 210 and 220, as shown in FIG. 6, are opened toward outside direction of the entrance space being the internal space between the external fire door 210 and the internal fire door 220. The reason for this is to minimize the entrance space.

[53] The double fire door frame 230 performs a function to seal the entrance space together with the external and internal fire doors 210 and 220.

[54] The double fire door frame 230 may be connected to at least one and more fire door frame that will be described hereinafter, or is applicable to wall formed of construction material such as cement. In this case, the fire door frame employed to the double fire door frame 230 may have not a compressed-air supplying pipe path and a high- pressure water supplying path laid therein and may be filled with fireproof-ceramic insulating material.

[55] At least two more than a compressed-air jet nozzle 242 and a high-pressure water jet nozzle 246 like the fire door frame 230 described in FIGS. 1 to 3 may be disposed on sides of the double fire door frame 230 for covering the external fire door 210 and exposed to the external space.

[56] The compressed-air jet nozzle 242 and the high-pressure water jet nozzle 246 are disposed along an outer circumference of the external fire door. The compressed-air jet nozzle 242 is disposed along a first outer circumference 252 covering the external fire door 210. The high-pressure water jet nozzle 246 is disposed along a second outer circumference covering the first outer circumference 252.

[57] Additionally, a projection 260 is disposed at a region right short of a point fastening the internal fire door 220 of the external fire door frame 230. The projection 260 includes more than two compressed-air jet nozzles 242 for fastening the internal fire door 220 as well as for injecting acompressed air supplied from the outside in a front direction toward the internal fire door 220.

[58] At this time, the compressed-air jet nozzle 246 of the internal fire door 220 prevents external smoke or noxious air from being inlet to the entrance space being an internal space between the external and internal fire doors 210 and 220.

[59] That is, in the event that the external fire door 210 is opened, the entrance space is exposed to the outside. At this time, if the compressed-air jet nozzle 246 injects compressed-air, an internal pressure of the entrance space becomes low. As a result, there is not much possibility that smoke or noxious air is inlet.

[60] The compressed-air jet nozzles 242 and 246, and the high-pressure water jet nozzle

244 will be described in detail referring to FIGS. 7 and 8.

[61] FIG. 7 is a disassembling view showing a region of an external fire door frame covering an external fire door exposed to the outside. Referring to FIG. 7, a compressed-air supplying pipe path 272 for supplying compressed airis laid in the first outer circumference, a high-pressure water supplying pipe path for supplying high- pressure water 274 to the high-pressure water jet nozzle 244 is laid in the second outer circumference 254.

[62] At this time, the compressed-air supplying pipe path 272 is laid in the first outer cir- cumferenceof the external fire door 210 as well as injected at a predetermined position of the double fire door frame 230. In addition, as shown in FIG. 8, the compressed-air supplying pipe path 272 may be extended to be laid in the projection 260 of the internal fire door 220.

[63] In a region of the double fire door frame 210 exposed to the outside, as shown in

FIG. 8, a vent switch 280 may be included. The vent switch280 has a structure that air outlets from the entrance space to the external space. This structurewill be described in detail hereinafter referring to FIG. 9.

[64] Referring to FIG. 9, the vent switch 280 may have a weight switch 282 and a vent tunnel 284. The vent tunnel 284 is connected to the entrance space. Accordingly, the vent tunnel 284, as shown in FIG. 7, is bent to be laid in the double fire door frame 210.

[65] The weight switch 282 performs a function to open and shut the vent tunnel 284. If the pressure of the entrance space is higher than that of the external space, the weight switch 282 discharges air of the entrance space to the outside by connecting the entrance space and the external space. The reason for this is that when external smoke or noxious air is inlet into the entrance space under the condition that the public enters into the entrance, the weight switch 282 performs a function to discharge the external smoke or the noxious air to the outside.

[66] FIG. 10 is a partial perspective view showing a shelter according to an embodiment of the present invention.

[67] Referring to FIG. 10, a shelter 300 includes a fire wall 310, an entrance 320, and a compressed-air and high-pressure water control box 330. The fire wall 310 is comprised of a flat, a ceiling (not shown), and four walls and seals tan internal space of the shelter 300. The entrance 320 is disposed in a predetermined region of the fire wall 310, and preferably, is disposed in a predetermined region among four walls and an advancing path of the public. The compressed-air and high-pressure water control box 330 is disposed in a predetermined region in the shelter 300 and controls compressed air and high-pressure water, which supply from the outside.

[68] The entrance 320 has the same structure as the entrance 200 shown in FIGS. 4 to 9.

The double fire wall frame 230 may be exposed to the outside in the entrance 320. Preferably, as shownin FIG. 10, a part of the double fire wall frame 230 including a fire door 322, the compressed-air jet nozzle 324, and the high-pressure water jet nozzle 326 is exposed.

[69] At this time, the compressed air and the high pressure water supplied to the compressed-air jet nozzle 324 and the high-pressure water jet nozzle 326 are supplied from the compressed-air and high-pressure water control box 330.

[70] In the fire wall 310, a compressed-air supplying pipe path (not shown) and a high- pressure water supplying path (not shown) are laid. They perform a function to connect the compressed-air and high-pressure water control box 330, and the compressed-air jet nozzle 324 and the high-pressure water jet nozzle 326 of the entrance 320.

[71] Also, a compressed-air supplying pipe path 352 and a high-pressure water supplying pipe path 354 are disposed on a surface of the fire wall 310. They are connected to the compressed-air and high-pressure water control box 330and respectively include a compressed-air jet nozzle 342 and a high-pressure water jet nozzle 344 for respectively injecting compressed air and high-pressure water to an internal space of the shelter.

[72] In this case, the compressed-air jet nozzle 342 and the high-pressure water jet nozzle 344 supply compressed air to an internal space of the shelter to raise an internal pressure thereof. As a result, it is possible to prevent smoke or noxious air from being inlet into the internal space of the shelter. Moreover, they supply high pressure water so as to immediately extinguish fire and receive compressed air and high pressure water from the compressed-air and high-pressure water control box 330.

[73] As shown in FIG. 11, the fire wall 310 is formed by connecting a plurality of fire wall frames 400.

[74] The shape of the fire wall frame 400 is a hollow rectangular parallelepiped by bending and welding iron plate being fire protection material. At one side among inner space of the fire wall frame 400, a fireproof ceramic insulating material 420 is formed with a predetermined thickness, and a fireproof ceramic insulating material 430 is formed with a predetermined thickness on an external surface another side corresponding to the fireproof ceramic insulating material 420. In this case, the side where the fireproof ceramic insulating material 430 of the external surface is disposed is exposed to the outside.

[75] Acompressed-air supplying pipe path 442 and a high-pressure water jet supplying path 444, which are connected to the compressed-air and high-pressure water control box 330, are regularly arranged and laid in the fire wall frame 400.

[76] The compressed-air supplying pipe path 442 and the high-pressure water jet supplying path 444 include a compressed-air jet nozzle 452 and a high-pressure water jet nozzle 454. The compressed air and high pressure water injected from the compressed-air jet nozzle 452 and the high-pressure water jet nozzle 454 cool exposed sides of the fire wall frame 400. Therefore, the compressedair and high pressure water injected from the compressed-air jet nozzle 452 and the high-pressure water jet nozzle 454 cool the fire wall frame 400 to restricttemperature of the shelter to be raised.

[77] Meanwhile, a drain 360 for discharging the compressed air and the high pressure water injected from the fire wall 310 is disposed at a predetermined position of the fire wall 310.

[78] An external compressed-air supplying pipe path 372 and an external high-pressure water supplying pipe path 374 are disposed at a predetermined position of the fire wall 310. They perform a function to supply compressed air and high pressure water from the outside to the compressed air and high pressure water control box 330.

[79] FIG. 12 is a partial cross-sectional view showing a vertical cross-section of the fire wall 310 formed by connecting the fire wall frame 400 described in FIG. 11.

[80] Referring to FIG. 12, four sidewalls 462, a flat 464, and a ceiling 466 are formed by connecting the fire wall frame 400 of FIG. 11. As above mentioned, the compressed- air supplying pipe path 442 and the high-pressure water supplying pipe path 454 with the compressed-air jet nozzle 452 and the high-pressure water jet nozzle 454 may be regularly arranged at the four sidewalls 462, the flat 464, and the ceiling 466.

[81] After forming the fire wall 310 by connecting the fire wall frame 400, the fireproof ceramic insulating materials 472 and 474 may be further formed on internal and external surfaces thereof, respectively.

[82] FIG. 13 shows the compressed-air and high-pressure water control box 330. The compressed-air and high-pressure water control box 330 is disposed at a predetermined position of the shelter and controls compressed air and high pressure water supplied from the outside. In addition, the compressed-air and high-pressure water control box 330 connects the compressed-air supplying pipe path 372 and the external high- pressure water supplying pipe path 374, and the compressed-air supplying pipe paths 150, 272, 342, and 442 and the high-pressure water supplying pipe paths 160, 274, 354, and 444.

[83] The compressed-air and high-pressure water control box 330 includes an external pipe path switch 332 and an individual switch 334. The external pipe path switch 332 opens and shuts the external compressed-air supplying pipe path 372 and the external high-pressure water supplying pipe path 374. The individual switch 334 opens and shuts the compressed-air supplying pipe paths 150, 272, 342, and 442 and the high- pressure water supplying pipe paths 160, 274, 354, and 444.

[84] Meanwhile, a vent switch 380 for connecting an internal space and an external space of the shelter may be disposed at a predetermined position of the fire wall 310.

[85] FIG. 14 is a partial perspective view showing a vent switch disposed on a fire wall.

Referring to FIG. 14, the vent switch 380 may include a weight switch 382 and a vent tunnel 384. The vent tunnel 384 is connected to an internal space of the shelter. Ac- cordingly, the vent tunnel 384 may be laid in the fire wall 310.

[86] The weight switch 382 performs a function to open or shut the vent tunnel 384. If the internal pressure of the shelter is higher than external pressure of that, the weight switch 382 discharges air of the internal space of the shelter to the outside by connecting the internal space and the external space of the shelter. Resultantly, the weight switch 382 not only maintains the internal pressure of the shelter constant pressure, but only removesnoxious air in the internal space of the shelter.

[87] FIG. 15 is a perspective view showing a construction that a compressed air and a high pressure water are supplied to an external compressed air supplying pipe path 372 and an external high pressure water supplying pipe path 374.

[88] Referring to FIG. 15, the external compressed-air supplying pipe path 372 is connected to an air pressurization pump 510, a compressed-air storing tank 520, and a compressed-air pump 530. The external high-pressure water supplying pipe path 374 is directly connected to a fire hydrant-water connection pipe path 550, or aflow pressurization pump 560, a high-pressure water storing tank 570, and a high-pressure water pump 580.

[89] In this case, the air pressurization pump 510 compresses external aid to store it in the compressed-air storing tank 520, and then provide the compressed-air stored at the compressed-air storing tank to the compressed-air pump 530. A compressed-air opening and closing valve 540 is included between the compressed-air pump 530 and the external compressed-air supplying pipe path 372. The compressed-air opening and closing valve 540 provides compressed air by opening and closing operation.

[90] In case that hydraulic pressure of the fire hydrant- water connection pipe path 550 is high, additional water supplying device is not required. If hydraulic pressure of the fire hydrant- water connection pipe path 550 is not enough high, however, the flow pressurization pump 560 renders flowing inlet into the flow pressurization pump 560 high pressure water to store it at the high-pressure water storing tank 570. This high pressure water is provided to the external high-pressure water supplying pipe path 374 using the high-pressure water pump 580. In this case, a high-pressure water opening and closing valve 590 is included betweenthe fire hydrant- water connection pipe path 550 and the high-pressure water pump 580. High-pressure water is provided by opening and closing high-pressure water opening and closing valve 590.

[91] Excepting the above description, the fourth preferred embodiment of the present invention has the same operation as the combined panoramic and CT photographing apparatus according to the first preferred embodiment.

[92]

Industrial Applicability [93] According to the shelter and the entrance thereof, outer smoke and noxious air can be prevented from being inlet into the shelter and the entrance thereof.

[94] Additionally, even if a little of smoke and noxious air is inlet, they are discharged to the outside by the compressed air and the high pressure water injected from the compressed-air jet nozzle and the high-pressure water jet nozzle.

[95] Furthermore, even if external temperaturerises, it is possible for internal temperature not to be risen by including the compressed-air jet nozzle and the high- pressure water jet nozzle, which is able to restrict temperature of the shelter to be raised.

Claims

[ 1 ] An entrance of a shelter comprising: a fire door formed of fire protection material; and a fire door frame covering an outer circumference of the fire door, wherein the fire door frame includes more than two compressed-air jet nozzles and high-pressure water jet nozzles which respectively inject a compressed air and a high pressure water in a front direction toward the fire door.

[2] The entrance according to claim 1, wherein the compressed-air jet nozzle is disposed along a first outer circumference covering the shelter, and the high- pressure water jet nozzleis disposed along a second outer circumference covering the first outer circumference.

[3] An entrance of a shelter comprising: an external fire door formed of fire protection material; an internal fire door apart from the external fire door as far as a predetermined distance and formed of fire protection material; and a double fire door frame covering outer circumferences of the external and internal fire doors and sealing a space therebetween, wherein more than two compressed-air jet nozzles and a high-pressure water jet nozzles are disposed at a region of the double fire door frame covering the external fire door and exposed to the outside, and wherein the compressed-air jet nozzle and the high-pressure water jet nozzlere- spectively inject a compressed air and a high pressure water supplied from the outside in a front direction of the external fire door, and wherein a projection is disposed at a region right short of a point fastening the internal fire door of the double fire door frame, and wherein the projection includes more than two compressed-air jet nozzlesfor injecting a compressed air supplied from the outside in a front direction toward the internal fire door.

[4] The entrance according to claim 3, wherein the compressed-air jet nozzlealong the outer circumference of the external fire door is disposed along a first outer circumference covering the external fire door, and the high-pressure water jet nozzle is disposed along a second outer circumference covering the first outer circumference.

[5] The entrance according to claim 3, wherein a vent switch for connecting an internal space between the external and internal fire doors and an outer space of the external fire door is disposed in the double fire door frame.

[6] The entrance according to claim 5, wherein the vent switch is operated to discharge air of the internal space to the outside and then eliminate a noxious air of the internal space supplied from the outside when a pressure of the internal space is higher that of the external.

[7] The entrance according to claim 5, wherein the external and internal fire doors are opened toward an outer direction of the internal space.

[8] A shelter comprising: a fire wall for sealing an internal space of a shelter; an entrance located at a predetermined region of the fire wall and where the public are evacuated via the entrance; and a compressed air and high pressure water control box located at a predetermined region of the internal space of the shelter and for controlling a compressed air and a high pressurewater supplied from the outside, wherein the entrance comprises: an external fire door formed of fire protection material; an internal fire door apart from the external fire door as far as a predetermined distance and formed of fire protection material; and a double fire door frame covering outer circumferences of the external and internal fire doors and sealing a space therebetween, wherein more than two compressed-air jet nozzles and high-pressure water jet nozzles are disposed at a region of the double fire door frame covering the external fire door and exposed to the outside, and wherein the compressed-air jet nozzle and the high-pressure water jet nozzle respectively inject a compressed air and a high pressure water supplied from the compressed air and high pressure water control box in a front direction of the internal fire door, and wherein a projection is disposed at a region right short of a point fastening the internal fire door of the doublefire door frame, and wherein the projection includes more than two a compressed-air jet nozzle for injecting a compressed airsupplied from the compressed air and high pressure water control box in a front direction toward the external fire door, and wherein a compressed air supply pipe path and a high pressure water supply pipe path are regularly laid which connected to the compressed air and high pressure water control box and respectively having a compressed-air jet nozzle and a high-pressure water jet nozzlein the fire wall, and wherein a compressed air supply pipe path and a high pressure water supply pipe path include a compressed-air jet nozzle for injecting a compressed air to an internal space of the shelter and a high-pressure water jet nozzle for injecting a high pressure water on a surface of the fire wall, respectively.

[9] The shelter according to claim 8, further comprising a drain for discharging an compressed air and a high pressure water injected in the fire wall, and a high pressure water injected on the surface of the fire wall.

[10] The shelter according to claim 8, further comprising a vent switch for connecting the internal space and the external space of the shelter.

[11] The shelter according to claim 10, wherein the vent switchis operated to discharge air of the internal space to the outsideand then eliminate a noxious air of the internal space supplied from the outside when a pressure of the internal space is higher that of the external.