KR19980036020A - Positive Pressure Air Breathing System - Google Patents

Abstract

The present invention provides a nozzle through which the nozzle tube is formed transversely to the center and a plurality of nozzle holes are formed in the flange portion extending vertically from the end of the nozzle tube to receive the secondary pressure air through the medium pressure hose; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the flow path between the nozzle hole of the nozzle valve and the air outlet to the surface and atmospheric pressure is applied to the outside, and the internal pressure of the surface is applied to the inner side. And a positive pressure air breathing system which opens and closes the nozzle hole from the nozzle valve by a relative magnitude between the internal pressure of the face and the atmospheric pressure at the time of inspiration and exhalation, thereby enabling breathing in a positive pressure state. And a means for forcibly opening or closing the nozzle hole from the nozzle valve by connecting or blocking the nozzle valve and the pressure-resistant nozzle through the connection passage by rotating by an external operation force.

Description

Positive Pressure Air Breathing System

The present invention relates to a positive pressure air breathing system, and more particularly, to a positive pressure air breathing system for operating the supply valve using the pressure of the air supplied in the positive pressure air breathing system.

An air respirator is a device that allows breathing by supplying clean air filled to the air cylinder while blocking the inflow of toxic gas when toxic gas is spread around. Such air respirators may also be used in unconscious patients who have poor oxygen or difficulty breathing on their own.

Meanwhile, the air respirator is classified into a positive pressure type and a negative pressure type as the pressure inside the surface is higher and lower than atmospheric pressure.

Positive pressure air respirator keeps the pressure inside the surface higher than atmospheric pressure compared to the negative pressure air respirator, which prevents toxic gas from entering the surface through the gap between the surface and the face. There is an advantage.

1 is a perspective view schematically showing the overall configuration of a general positive pressure air breathing system. As shown in FIG. 1, a general positive pressure air breathing system includes a facet 1 that contacts the face of a human body, a face lens 3 and a facet that is installed on the front face of the facet 1 so as to secure a front view. Control strap 5 for close contact with rubber on the edge of 1) on the face, outflow from air cylinder 13 and air cylinder 13 filled with high-pressure (hereinafter referred to as primary pressure) breathing air High pressure regulator 11 for reducing the pressure of the compressed air to an appropriate level (hereinafter referred to as secondary pressure), and making the air pressure lower than the secondary pressure and slightly higher than atmospheric pressure (hereinafter referred to as tertiary pressure). It is composed of a medium pressure hose (9) connecting between the air inlet of the air supply device 15 and the high pressure regulator 11 and the air inlet of the air supply device 15 to supply 1).

In addition, an on-off valve for opening and closing the air inlet and outlet of the air cylinder 13, an alarm for alarming when the air pressure discharged from the air cylinder 13 falls below the pressure set by the specifications of the cylinder and the air pressure of the air cylinder 13 is measured A pressure gauge may be added as a configuration of an air breathing system.

Figure 2 is a cross-sectional view showing a configuration according to an embodiment of an air supply device used in a conventional positive pressure air breathing system, Figure 3 is an exploded perspective view for explaining the operating state of the valve opening and closing unit in Figure 2, Figure 4A 4B is an enlarged cross-sectional view illustrating an operating state of the valve unit in FIG. 2.

As shown in Figs. 2 to 4A and 4B, the conventional air supply device is largely composed of a body unit 20, a valve unit 30 and a valve opening and closing unit 40. An air outlet 22 is formed above the body unit 20, and an air inlet 21 is formed on the side thereof. A partial partition 23 is formed in the body unit 20 to partition the air inlet 21 and the air outlet 22.

The air outlet 22 is also provided with a connecting member to operate the connecting member can connect the air supply to the air inlet provided in the front of the surface 1 or can be separated from the air inlet. The medium pressure hose 9 is coupled to the air inlet 21 by an appropriate connection member.

On the other hand, the lower portion of the body unit 20 is formed with a valve unit fastener 24 for inserting and fastening the valve unit 30, the valve unit fastener 24 is an air inlet 21 and air outlet ( 22) to communicate with each other.

The valve unit 30 has an opening / closing lever for applying an air supply nozzle 31, a valve 32 for opening and closing the hole of the nozzle 31, and a force for opening the valve 32 (hereinafter referred to as an open force) ( 33, a return spring 34 for returning the valve 32 to the closed state when the opening force by the open / close lever 33 is not applied, and a valve cap for fixing the above components to the valve unit fastener 24 ( 54).

In the above configuration, in the state where the valve unit 30 is completely inserted into the valve unit fastener 24, the air reaching the air inlet 21 according to whether the valve 32 is opened or closed is air outlet 22. Leaked or blocked; In other words, when the valve 32 is opened, air flows out in the same direction as indicated by the arrow in FIG.

Next, the valve opening and closing unit 40 has a connecting member 41 for coupling it with the body unit 20, a support member 42 for supporting the components constituting the valve opening and closing unit 40, and an opening and closing lever ( 33, a diaphragm 43 for applying an opening force, a push member 44 for transmitting a pushing force to the diaphragm 43, a compression spring 45 for applying an elastic force to the push member 44, and a valve from a user. It consists of an opening and closing handle 46 for receiving the opening and closing command.

In the above-described configuration, when the user rotates the opening / closing handle 46 clockwise, that is, when the user turns the position from the position P to the position N in FIG. 3, the guide jaw 44a formed on the push member 44 is formed. It moves along the stopper 42a formed in the support member 42. During this movement, the stopper 50 protruding into the opening / closing handle 46 reaches a position at which the corresponding end of the guide groove 42b formed in the support member 42 is caught. ) Is restrained by the stopper 42a formed on the support member 42, so that the elastic force of the compression spring 45 is not applied to the diaphragm 43. As a result, the diaphragm 43 is restored to the original convex state, and subsequently the opening and closing lever 33 is returned to close the valve 32 as shown in FIG. 4A.

In this state, when the user rotates the opening / closing handle 46 counterclockwise, that is, when the user turns from the position N toward the position P, the guide jaw 44a formed on the push member 44 is supported by the support member ( It moves along the stopper 42a formed in 42. During this movement, the stopper 50 protruding into the opening / closing handle 46 reaches a position at which the corresponding end of the guide groove 42b formed in the support member 42 is caught. ) Is released from the stopper 42a formed on the support member 42, so that the elastic force of the compression spring 45 is applied to the diaphragm 43. As a result, the diaphragm 43 is contracted, and the opening / closing lever 33 is subsequently moved to open the valve 32 as shown in FIG. 4B.

In the drawings, reference numerals 47 and 48 denote valves 32 by forcibly applying a direct force to the diaphragm 43 in a state where an abnormality occurs in the above-described mechanism or when the opening / closing handle 46 is turned to the position N. And a push rod connected thereto, respectively, and 49 represents a return spring 49 for retracting the push rod 48 when the user releases the push button 47.

However, in the conventional air supply apparatus as described above, since the valve opening / closing mechanism for opening and closing the valve is composed of parts generating direct contact force, that is, the opening / closing handle, the compression spring, the push member, the supporting member, the opening / closing lever, etc. There was a problem that the airborne increases and the volume and weight increase. In addition, when the direct contact force is accumulated, there is a problem in that the service life is limited because parts are broken or blunt.

In addition, when the elastic force of the compression spring is large, since the pressure inside the surface is increased, the force is transmitted to the lungs, thereby increasing the discomfort index due to the pressure during breathing, and there is a problem that the fear is intensified depending on the environment of the work site. Further, when the worker is facing up in the state wearing the face, there is a problem that the force pushing the diaphragm by the weight of the push member is increased than when facing the head down. That is, there is a problem that the pressure inside the surface is changed according to the direction of the head of the worker.

In addition, if the return spring is twisted or there was a problem that it is impossible to adjust the air pressure.

5 is a longitudinal sectional view schematically showing a configuration according to another embodiment of an air supply device used in a conventional positive pressure air breathing system, Figure 6 is a plan view showing the air supply device with the diaphragm removed in FIG. As shown above, the positive pressure forming process shows an air supply apparatus operated by using the pressure of the air itself supplied instead of the direct contact force of the related parts.

In the air supply device shown in FIGS. 5 and 6, the air inlet formed in the supply nozzle 61 is connected to the medium pressure hose 9, and the air outlet formed in the body unit 60 is provided in front of the face 1. When the valve blocking the discharge port of the air cylinder 13 is opened while being connected to the inlet port, the secondary pressure air reduced through the high pressure regulator 11 and the medium pressure hose 9 is supplied through the supply nozzle 61. do. Accordingly, the nozzle valve 63 located at the rear end of the supply nozzle 61 is pushed down, and as a result, air passes through the nozzle hole 61a formed in the flange located at the end of the supply nozzle 61, and then the body unit 60 It flows into the surface 1 through the central through-hole 67 formed in the), and the user can inhale air. In this state, the diaphragm 62 is rolled back by the spring 65 so that the diaphragm 62 does not block the pressure-resistant nozzle 64.

On the other hand, when the user stops breathing or exhales, the diaphragm 62 shafts the spring 65 because the internal pressure of the surface 1 is transmitted to the diaphragm 62 through the pressure transfer hole 69. As a result, the diaphragm 62 prevents the outflow of air through the pressure-resistant nozzle 64. In this way, when the pressure-resistant nozzle 64 is blocked, the air passing through the nozzle hole 63a of the nozzle valve 63 becomes a positive pressure and blocks the bypass hole 61a of the supply nozzle 61. As a result, the user It waits in a positive pressure state until the next suction operation is started.

Reference numeral 66 denotes a locking member for mounting or detaching the device from the facet 1. Reference numeral 70 denotes a coupling jaw that engages the coupling frame 62a formed inside the vertical bent portion of the diaphragm 62, whereby airtightness of the inner space A of the diaphragm 62 is maintained.

According to the above-described embodiment, since the positive pressure is formed using the pressure of the air itself, the volume and the weight of the apparatus are reduced.

However, in the air supply apparatus according to the above-described embodiment, since the air supply apparatus does not include a means for controlling the outflow of the air to the surface, a means for adjusting the outflow amount, and a means for directly supplying the air in the event of an emergency, etc. are used. There were many problems in terms of convenience and safety, and the consumption of air was relatively high. That is, the user has to operate the valve provided in the air cylinder in order to control the outflow of air, so that inconvenience comes, and thus the consumption of air is also relatively large.

In addition, in the above-described embodiment, since the body unit is manufactured by injection molding, an uneven parting line is inevitably generated in the coupling groove, and thus, the airtightness of the inner space A of the diaphragm is damaged. In addition, there is a problem that a variation occurs in the pressure inside the surface according to the spring pressure.

The present invention has been made to solve the problems of the air supply device of the conventional positive pressure air breathing system described above, the main object of which is to form a positive pressure by using the pressure of the air itself to the face of the air on the air supply device to form a positive pressure It is to provide a positive pressure air breathing system that can improve the convenience of operation by reducing the outflow, and further reduce the consumption of unnecessary air.

Another object of the present invention is to provide a positive pressure type air breathing system that improves convenience by allowing the air supply to form a positive pressure by using the pressure of the air itself to adjust the amount of air flowing into the surface.

Positive pressure air breathing system according to an aspect of the present invention for achieving the above object is a plurality of nozzles are formed through the center transversely through the center and the flange portion extending vertically from the end of the nozzle tube is in communication with the surface A nozzle for forming a nozzle and receiving air at a secondary pressure through the medium pressure hose; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the middle of the pressure detection flow path formed between the nozzle hole of the nozzle valve and the outer surface is applied with atmospheric pressure and the inner pressure of the inner surface is applied to the inner diaphragm for opening and closing the pressure resistant nozzle by the applied pressure difference. And a positive pressure type to open and close the nozzle hole of the supply nozzle from the nozzle valve by opening / closing the nozzle of the supply nozzle according to the relative magnitude of the internal pressure of the face and the atmospheric pressure at the time of inhalation and exhalation. In the air breathing system, a connection flow path is formed therein, and the nozzle hole of the supply nozzle is opened from the nozzle valve by rotating by an external operation force and connecting or blocking the nozzle valve and the pressure-resistant nozzle through the connection flow path. Or means for closing.

Positive pressure air breathing system according to another feature of the present invention is a nozzle tube is formed by penetrating the center horizontally and the flange portion extending vertically from the end of the nozzle tube is formed a plurality of nozzle holes in communication with the surface is formed a medium pressure hose A supply nozzle for receiving air at a secondary pressure through the air; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the middle of the pressure detection flow path formed between the nozzle hole of the nozzle valve and the outer surface is applied with atmospheric pressure and the inner pressure of the inner surface is applied to the inner diaphragm for opening and closing the pressure resistant nozzle by the applied pressure difference. And a positive pressure type to open and close the nozzle hole of the supply nozzle from the nozzle valve by opening / closing the nozzle of the supply nozzle according to the relative magnitude of the internal pressure of the face and the atmospheric pressure at the time of inhalation and exhalation. In the air breathing system, in addition to the inlet flow passage through the nozzle hole and the nozzle valve formed in the supply nozzle, the bypass flow path for bypassing the secondary pressure air through the medium pressure hose directly to the air outlet port and through the bypass flow path And means for controlling the amount of air.

Positive pressure air breathing system according to another feature of the present invention is a medium pressure hose is formed through a plurality of nozzle holes in communication with the surface is formed in the flange portion extending vertically from the end of the nozzle tube is formed through the center of the nozzle tube A supply nozzle provided with air at a secondary pressure through; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the middle of the pressure detection flow path formed between the nozzle hole of the nozzle valve and the outer surface is applied with atmospheric pressure and the inner pressure of the inner surface is applied to the inner diaphragm for opening and closing the pressure resistant nozzle by the applied pressure difference. And a positive pressure type to open and close the nozzle hole of the supply nozzle from the nozzle valve by opening / closing the nozzle of the supply nozzle according to the relative magnitude of the internal pressure of the face and the atmospheric pressure at the time of inhalation and exhalation. An air breathing system, comprising: an opening / closing handle to which external manipulation force is applied; The opening and closing spin shaft is coupled to the opening and closing handle and the opening and closing spin and rotatably support the opening and closing spin and the opening and closing spin that is formed in place of the nozzle valve and the pressure-resistant nozzle, the body of the opening and closing spin And a support member having a through hole communicating with the pressure-resistant nozzle at a position facing the rotational trajectory of the end of the connecting flow passage of the cylindrical portion, and the rotation of the opening and closing spindles linked to the operation of the opening and closing handle By connecting the body of the opening and closing spindle to the through hole formed in the support member or by blocking the through hole characterized in that the opening or closing the nozzle hole of the supply nozzle from the nozzle valve.

1 is a perspective view schematically showing the overall configuration of a general positive pressure air breathing system,

Figure 2 is a cross-sectional view showing a configuration according to an embodiment of an air supply device used in a conventional positive pressure air breathing system,

Figure 3 is an exploded perspective view for explaining the operating state of the valve opening and closing unit in Figure 2,

4A and 4B are enlarged cross-sectional views illustrating an operating state of the valve unit in FIG. 2;

Figure 5 is a longitudinal sectional view schematically showing a configuration according to another embodiment of an air supply device used in a conventional positive pressure air breathing system,

6 is a plan view showing an air supply device in a state in which the diaphragm is removed in FIG.

7 is a front view of the air supply apparatus of the positive-pressure air breathing system according to a preferred embodiment of the present invention,

8 is a longitudinal cross-sectional view taken along line II of FIG. 7;

9 is a rear view of the air supply device shown in FIG.

FIG. 10 is a longitudinal cross-sectional view taken along line II-II of FIG. 7;

11 is a side view of the air supply device shown in FIG.

12 is an enlarged cross-sectional view of the nozzle valve in FIG.

13A and 13B are exploded perspective views illustrating an operating state of the valve opening and closing unit in FIG. 8;

14 is an exploded perspective view for explaining the structure of each part of the positive pressure forming unit in FIG. 8;

Figure 15 is a block diagram equivalently representing the positive pressure air breathing system of the present invention.

*** Explanation of symbols for main parts of drawing ***

100: body unit, 101: air inlet,

103: air outlet, 105: nozzle cylinder,

107: central aperture, 109: valve seat,

111: valve unit insertion port, 113: opening and closing unit insertion port,

117: control unit insert, 121: positive pressure forming chamber,

123: support projection, 125: pressure transfer hole,

127: bypass entrance hole, 129: bypass exit hole,

130: faceted connection member, 140: filter,

141: filter fixing member, 151: coupling hole,

153: home,

200: valve unit,

210: supply nozzle, 211: nozzle pipe,

213: male thread, 215: bypass ball,

216: flange portion, 217: nozzle hole,

219, 221, 223: O-ring, 230: nozzle valve,

231: rubber plate, 233: metal piece,

235: nozzle ball,

300: valve opening and closing unit, 310: opening and closing handle,

311: locking jaw, 313: locking groove,

315: handle cap, 320: support member,

321: external thread, 323: through hole,

325: stopper, 327: ball insertion groove,

328: compression spring, 329: ball,

330: opening and closing spindle, 332: horizontal passage,

333: vertical passage, 335: connecting rod,

337: O-ring seat, 339: O-ring,

340: pressure-resistant nozzle,

400: positive pressure forming unit, 410: cap member,

411: spinneret, 413: air entrance,

415: guide projection, 417: internal thread,

419: push jaw, 420: diaphragm,

421: disc portion, 423: metal plate,

425: elastic portion, 427: hanger,

500: flow control unit, 510: adjustment knob,

520: throttle valve, 521: O-ring,

600: air source, 610: icosahedron,

620: main flow path, 630: on-off valve,

640: on-off valve, 642, 682: operation knob,

650: pressure detection unit, 660: control unit,

670: bypass flow path, 680: flow control valve

Hereinafter, with reference to the accompanying drawings, a positive pressure air breathing system according to a preferred embodiment of the present invention will be described in detail, the same reference numerals are given to the same parts as shown in FIG.

7 is a front view of the air supply apparatus of the positive-pressure air breathing system according to a preferred embodiment of the present invention, Figure 8 is a longitudinal cross-sectional view taken along the line I-I in Figure 7, Figure 9 is the air shown in Figure 7 It is a rear view of a supply apparatus, FIG. 10 is a longitudinal cross-sectional view which looked at the II-II line in FIG. 7, and FIG. 11 is a side view of the air supply apparatus shown in FIG.

As shown in Figure 7 to 11, the air supply device of the positive pressure air breathing system of the present invention is largely the body unit 100, the valve unit 200, the valve opening and closing unit 300, the positive pressure forming unit 400 And a flow rate control unit 500.

An air inlet 101 is formed at one side of the body unit 100, and an air outlet 103 is formed at a rear surface of the body unit 100. On the side facing the air inlet 101, the valve opening and closing unit 300 is inserted and fixed to the insertion port 113 is formed, the side perpendicular to the air inlet 101, the flow control unit 500 is inserted, fixed Insertion hole 117 is formed. Finally, the positive pressure forming unit 400 is coupled to the front of the body unit 100.

The air inlet 101 and the opening / closing unit insertion port 113 are penetrated, and a step that functions as a valve seat 109 is formed in the middle of the pipeline thus formed. The supply nozzle 210 described later is inserted and fixed in the right passage (hereinafter referred to as the nozzle cylinder 105) around the valve seat 109, and the opening / closing unit insertion port 113 of the valve unit 200. Part of the nozzle valve 230 and the valve opening and closing unit 300 is sequentially inserted.

In the center of the nozzle cylinder 105 of the body unit 100 is formed a central through-hole 107 in communication with the air outlet 103, the opposite side is formed a space that functions as a positive pressure forming chamber 121 In addition, the pressure transfer hole 125, the bypass inlet hole 127, the bypass outlet hole 129, and the like, which will be described in detail later, are formed in place.

Reference numeral 130 denotes a facet connecting member for coupling the apparatus of the present invention to the facet 1, and 140 and 141 denote a filter and a fixing member for filtering foreign substances introduced into the facet 1, respectively. Reference numeral 123 denotes a support protrusion projected perpendicularly to the position of the positive pressure forming chamber 121, and the support protrusion 123 transmits pressure from the surface 1 to the diaphragm 420 described later. If not, the diaphragm 420 is supported to be horizontal so that the pressure-resistant nozzle 340 is not blocked.

Next, the valve unit 200 has O-rings 219 and 221 which maintain airtightness between the supply nozzle 210 to which the air through the medium pressure hose 9 is supplied, the nozzle valve 230 and the associated coupling parts. , 223. In the supply nozzle 210, a nozzle tube 211 is formed through the center of the supply nozzle 210, and a flange portion 216 is formed at an end portion facing the nozzle valve 230 of the nozzle tube 211. The flange portion 216 is formed with a plurality of nozzle holes 217 penetrating them laterally.

In the middle of the supply nozzle 210, a bypass hole 215 penetrating the body vertically is formed. The outer diameter of the portion inserted into the nozzle cylinder 105 of the supply nozzle 210 is substantially smaller than the inner diameter of the nozzle cylinder 105. In some cases, the bypass hole passes through the space created by the difference in diameter. The air exiting the 215 may flow out to the air outlet 103. The O-ring 219 is mounted between the bypass hole 215 and the nozzle hole 217 to block the air from entering each other.

On the other hand, in the position where the supply nozzle 210 is fully inserted, the central through hole 107 formed in the body unit 100 is to be placed on the left side of the O-ring 219, depending on whether the nozzle valve 230 is in close contact The nozzle hole 217 and the central through hole 107 may communicate with each other or may be blocked.

12 is an enlarged cross-sectional view of the nozzle valve in FIG. 7. As shown in FIG. 12, the nozzle valve 230 is formed of a rubber plate 231 and a metal piece 233 planted at the center of the rubber plate 231, and the diameter of the nozzle tube 211 is set at the center of the metal piece 233. In comparison, a fine nozzle hole 235 having a very small diameter is formed. In the valve unit 200, reference numeral 213 denotes a male screw for connection with the medium pressure hose 9.

13A and 13B are exploded perspective views illustrating an operating state of the valve opening and closing unit in FIG. 8. As shown in FIGS. 13A and 13B, the valve opening / closing unit 300 includes an opening / closing handle 310 for receiving a valve opening / closing instruction from a user, a supporting member 320 for supporting components of the unit 300, Opening spindle 330 and the pressure-resistant nozzle 340 to allow or block the communication of the air to the air outlet 103.

Opening and closing handle 310 is made of a stopper shape, the inside of the opening and closing handle 310 is formed with a fan-shaped locking jaw 311, the inside of which forms a 120 °, for example, the locking jaw 311 A locking groove 313 is formed at a position opposite to the locking groove.

The support member 320 is composed of a head portion in which the opening and closing handle 310 is mounted and a cylindrical portion in which the body of the opening and closing spindle 330 is accommodated. A stopper 325 is formed on the head of the support member 320 to stop the rotation of the locking jaw 311 at a fixed position, that is, a closed position as shown in FIG. 13A or an open position as shown in FIG. 13B. The ball insertion groove 327 is formed on the side. The ball insertion groove 327 is inserted into the compression spring 328 and the ball 329 to maintain the open and close position when the operating force is not applied to the opening and closing handle 310. In place of the body portion of the support member 320 is formed through-hole 323 in communication with the pressure-resistant nozzle 340 to be described later.

Opening and closing spindle 330 is composed of a body 331 and the connecting rod 335 extending from the body 331, the free end of the connecting rod 335 opening and closing handle through the coupling hole formed in the support member 320 Axially coupled with 310. Accordingly, when the opening and closing handle 310 is rotated to the opening and closing position, the supporting member 320 is transmitted to the body 331 of the opening and closing spindle 330 in a fixed state so that the opening and closing handle 310 and the opening and closing spindle 330 are rotated. ) Will rotate together.

The body 331 of the opening / closing spindle 330 has a passage 332 (hereinafter, referred to as a horizontal passage) having a predetermined depth from the free end thereof toward the connecting rod 335, and is perpendicular to the horizontal passage 332. In other words, a passage 333 (hereinafter referred to as a vertical passage) is formed in which the spindle body 331 is terminated to communicate with the horizontal passage 332. On the other hand, a groove 337 (hereinafter referred to as an O-ring seat) into which the O-ring 339 is inserted is formed on the outer circumferential surface of the spindle body 331 at a predetermined angle, for example, 120 ° away from the vertical passage 333. .

The pressure-resistant nozzle 340 is mounted to communicate with the positive pressure forming chamber 121 through the upper portion of the body unit 100 at a predetermined position in the opening / closing unit insertion port 113.

In the above-described configuration, when the user rotates the opening / closing handle 310 clockwise in the state of FIG. 13A, the locking jaw 311 is stopped by the stopper 325 while the opening / closing handle 310 is rotated at a predetermined angle, for example, 120 °. ), Further rotation stops. When the rotation is stopped in this way, the state of each part is in the state shown in FIG. 13B. In this position, the ball 329 is caught by the locking groove 313, and the position is maintained as it is when no external force is applied. Will be. Furthermore, when the ball 329 is caught by the locking groove 313, a click sound is heard, and the user hears this sound and finds that the opening / closing handle 310 is rotated to an open position.

Meanwhile, as shown in FIG. 13B, in the open position, the vertical passage 333 is in line with the through hole 323 formed in the body of the support member 320, and thus, the nozzle tube 211 and the nozzle valve 230 are disposed. A series of flow passages passing through the nozzle hole 235, the horizontal passage 332, the vertical passage 333, the through-hole 323, the pressure-resistant nozzle 340 is formed.

On the other hand, when the user rotates the opening / closing handle 310 counterclockwise in the state of FIG. 13B, the locking jaw 311 is stopped by the stopper 325 while the opening / closing handle 310 is rotated at a predetermined angle, for example, 120 degrees. The motor stops further rotation as it is caught. When the rotation is stopped in this way, the state of each part is in the state shown in FIG. 13A. In this state, the O-ring 339 seals the through hole 323 formed in the cylindrical portion of the support member 320, and is shown in FIG. 13B. The flow path as shown is not formed.

The positive pressure forming unit 400 includes a diaphragm 420 and a cap member 410 for protecting the positive pressure forming unit 400.

14 is an exploded perspective view for explaining the structure of each part of the positive pressure forming unit in FIG. 8. As shown in the above-described drawings and FIG. 14, the diaphragm 420 includes a disc part 421 located in the center and an elastic part 425 and an elastic part 425 extending upward from the disc part 421. In the back is made of a rubber plate made of a hook frame 427 horizontally bent and made of a metal plate 423 crimped to the inner side of the disc portion 421 of the rubber plate.

On the inner side of the cap member 410 is formed a push projection (419) for pressing the engaging frame (427) on the wall 122 of the positive pressure forming chamber 121 and the shaft projection (411) for holding the diaphragm (420). It is. The cap member 410 is further provided with an air access hole 413 through which air flows in and out so that the outside of the diaphragm 420 is always subjected to atmospheric pressure. A plurality of, for example, four female threads 417 and guide protrusions 415 are formed on a surface of the cap member 410 in contact with the body unit 100.

On the other hand, although not mentioned in the description of the above-described body unit 100, coupling holes 151 in the body unit 100 of the opposite position to the female screw 417 and the guide protrusion 415 formed on the cap member 410, respectively ) And guide grooves 153 are formed.

Assembling the diaphragm 420 and the cap member 410 to the body unit 100 having such a structure is the wall 122 that defines the positive pressure forming chamber 121 to the hook frame 427 of the diaphragm 420 The guide protrusion 415 formed in the cap member 410 is precisely aligned with the guide groove 153 in a state where it is naturally placed on the top), and then the coupling male screw (not shown) is coupled to the coupling hole 151 of the body unit 100. Coupling to the female screw 417 is completed via. As a result, the diaphragm 420 is ejected from the body unit 100 because the diaphragm 427 is pressed by the pressing jaw 419 of the cap member 410 in a state where the catching frame 427 is placed on the positive pressure forming chamber wall 122. Regardless of the parting line inevitably involved in molding, the airtightness in the positive pressure forming chamber 121 can be maintained perfectly. Furthermore, when the guide protrusion 415 is not inserted into the guide groove 153 correctly, the cap member 410 is not coupled to the body unit 100 in the correct position, thereby preventing misalignment.

Axon 411 is the diaphragm 420 when the pressure from the facet 1 is transmitted to the diaphragm 420 to accumulate the pressure-resistant nozzle 340, in the present invention, unlike the conventional spring Since reference numeral 65 in FIG. 5 is not used, pressure fluctuations inside the facet 1 can be eliminated.

Finally, the flow rate control unit 500 is inserted into and fixed to the control unit insertion hole 117 formed in the body unit 100, which flows out of the bypass inlet hole 127 formed by terminating the wall of the nozzle cylinder 105. It consists of a throttling valve 520 for precisely controlling the amount of air and a control knob 510 for manipulating the throttling valve 520. In the above configuration, when the user operates the control knob 510 to completely close the throttling valve 520, the end of the throttling valve 520 blocks the bypass inlet hole 127, and thus the bypass outlet hole. The outflow of air through 129 becomes impossible.

On the other hand, in this state, when the user operates the control knob 510 to release the throttle valve 520, the bypass hole 215 formed in the supply nozzle 210, the inner surface of the nozzle cylinder 105 and the supply nozzle ( A space is formed between the outer surface of the 210, a bypass inlet hole 127, a bypass outlet hole 129, a series of flow paths leading to the air outlet 103 is formed so that the air through the air inlet 101 is an air outlet ( 103) is bypassed.

Reference numeral 521 in the flow rate control unit 500 denotes an O-ring for preventing the atmosphere from directly entering the bypass outlet hole 129.

Hereinafter, the operation of the positive pressure air breathing system of the present invention having the above-described configuration will be described in detail.

To breathe using an air breathing system, the female screw member (not shown) provided in the medium pressure hose 9 is connected to the air supply apparatus while the air supply apparatus is connected to the surface 1 by manipulating the surface connecting member 130. Connect to the external thread 213 formed on the supply nozzle 210 of the. Next, the open / close valve provided in the air cylinder 13 is opened, and the one-touch plug of the medium pressure hose 9 is connected to the high pressure regulator 11 after the air cylinder 13 is comfortably worn. At this time, it is also confirmed whether the opening / closing handle 310 is turned to the closed position. Next, after loosening the control strap 5 provided on the surface 1 as much as possible, wear the surface 1 from the top to the face. Next, after evenly opening the surface (1), pull the control strap back with both hands, tighten it comfortably so as not to be too compressed, and then perform suction to check whether external air is introduced. If the outside air flows in, wear it again and pay attention to safety.

After completing the operation as described above, by turning the opening and closing handle 310 120 ° in its closed position, the air supply device is opened with a click sound and comfortable breathing in a positive pressure state is possible.

In more detail, when the user turns the opening / closing handle 310 to the open position in a state in which the face 1 is worn, the vertical passage 333 is connected to the body of the supporting member 320 as shown in FIG. 13B. It is in a straight line with the formed through hole 323. Accordingly, air flows out through the nozzle tube 211, the nozzle hole 235 of the nozzle valve 230, the horizontal passage 331, the vertical passage 333, the through-hole 323, and the pressure-resistant nozzle 340. In this state, since the air pressure applied from the supply nozzle 210 to the nozzle valve 230 is higher than the air pressure applied from the nozzle valve 230 to the supply nozzle 210, the nozzle valve 230 is pushed. As a result, the supplied air is discharged to the air outlet 103 via the nozzle hole 217 and the central through hole 107 formed in the flange portion 216 of the supply nozzle 210. In other words, the air is introduced into the surface 1 so that the human body can inhale the air at a positive pressure slightly higher than atmospheric pressure.

In this state, when the user stops breathing or exhales, the internal pressure of the face 1 in positive pressure state is transmitted to the positive pressure forming chamber 121 through the pressure transfer hole 125. At this time, since the atmospheric pressure is applied to the outside of the diaphragm 420 through the air access hole 413, the diaphragm 420 is axially rotated by the shaft projection 411 to close the pressure-resistant nozzle 340. do. When the internal pressure nozzle 340 is blocked, the air passing through the nozzle hole 235 of the nozzle valve 230 becomes a static pressure again to block the nozzle hole 217 of the supply nozzle 210.

If the user inhales in this state, the pressure inside the face 1 decreases rapidly and becomes lower than atmospheric pressure. As a result, the diaphragm 420 is restored to its normal state before compression. Accordingly, the pressure-resistant nozzle 340 is opened again, and the pressure drops because air through the pressure-resistant nozzle 340 is rapidly introduced into the surface 1 through the pressure transfer hole 125. As a result, the nozzle hole 217 is opened because the pressure on the left side of the nozzle valve 230 is lower than the pressure on the right side, and thus the supply of air is resumed.

In summary, the supply of air through the supply nozzle 210 is stopped when the user stops or exhales, and the supply of air through the supply nozzle 210 is resumed when inhaling. And this series of processes is automatically performed by the magnitude between atmospheric pressure, the internal pressure of the face 1 at the time of inhalation and exhalation.

On the other hand, when the air inflow and outflow path as described above is partially blocked by foreign matter, etc., the pressure inside the surface 1 is lowered, which makes the breathing uncomfortable. In this case, the control knob 510 until the breathing is comfortable. And open the throttling valve 520. When the throttling valve 520 is opened in this way, the air introduced through the medium pressure hose 9 passes through the bypass hole 215 formed in the middle of the supply nozzle 210, and the bypass inlet hole formed in the nozzle cylinder 105 ( 127), the bypass outlet hole 129 is sequentially introduced directly into the facet 1. As a result, the main flow path, the nozzle tube 211, the bypass hole 215, the bypass inlet hole 127, and the via sequentially pass through the nozzle hole 217, the central through hole 107, and the air outlet 103. Air flows into the facet 1 through the bypass flow path which passes through the pass exit hole 129 and the air outlet 103 sequentially. Therefore, if the user properly controls the amount of inlet air through the throttling valve 520, it is possible to keep the pressure in the surface 1 in a comfortable state to breathe.

In addition, when the main flow path as described above is completely blocked by foreign matter, air may be supplied only by the bypass flow path.

Figure 15 is a block diagram equivalently representing the positive pressure air breathing system of the present invention. As shown in FIG. 15, the positive pressure air breathing system according to the present invention includes an air supply source 600, a facet 610, a main flow path 620 connecting the air supply source 600, and a facet 610. 620 is installed in the middle of the opening and closing valve 630, the main passage 620 to allow or block the communication between the air supply source 600 and the surface 610 according to the breathing operation, the surface of the face ( 610, a pressure detector 650 for detecting a pressure change in the inside, and a pressure inside the facet 610 detected by the pressure detector 650 with a reference pressure, that is, an atmospheric pressure, and then an on / off valve 630 according to the comparison result. The control unit 660 for opening and closing the opening, the opening and closing valve 640 for opening and closing the main flow passage 620 by the external operating force, is connected between the air supply source 600 and the surface 610. Through the bypass flow path 670 and the bypass flow path 670 by the external operating force Group source to allow or block the communication of air between 600 and tetrahedron 610, and if the permit is provided with a flow control valve 680 to control its flow rate. In FIG. 15, reference numerals 642 and 682 denote operation knobs for applying external operating force to the on-off valve 640 and the flow control valve 680, respectively.

In FIG. 15, the facet 610 corresponds to the facet 1. The air supply source 600 corresponds to the air cylinder 13, the main flow path 620, as described above, the nozzle hole 217 formed in the medium pressure hose 9, the flange portion 216 of the supply nozzle 210, It may correspond to a series of flow paths leading to the central through hole 107 and the air outlet 103. The open / close valve 630 may correspond to the nozzle valve 230. The pressure detecting unit 650 is a series of pressure detecting flow paths (refer to reference numerals in FIG. 15) leading to the nozzle hole 235 of the nozzle valve 230, the positive pressure forming chamber 121, the pressure transfer hole 125, and the facet 1. It may correspond to the pressure resistant nozzle 340 installed in the reference. The controller 660 compares the internal pressure of the detected faceted body 1 based on the atmospheric pressure introduced through the atmospheric access hole 413 of the cap member 410, and opens and closes the pressure-resistant nozzle 340 according to the size. As a result, the nozzle valve 230 may correspond to the diaphragm 420 to open and close the nozzle hole 217 of the supply nozzle 210.

The open / close valve 640 may correspond to the related components of the support member 320 and the open / close spindle 330, and the operation knob 642 may correspond to the open / close handle 310. Finally, the bypass flow path 670, as described above, the medium pressure hose 9, the nozzle pipe 211, bypass hole 215, bypass inlet hole 127, bypass outlet hole 129 and air It may correspond to a series of flow paths passing through the outlet 103 in sequence, the flow control valve 680 may correspond to the throttling valve 520, the operation knob 682 to correspond to the control knob 510 Can be.

As a result, the positive-pressure air breathing system of the present invention may be implemented without various modifications within the range allowed by the technical spirit shown in FIG. 15 and the technical spirit described in the claims. .

According to the positive pressure air breathing system of the present invention as described above, by allowing the outflow of the air to the faceted surface on the air supply device to improve the convenience of operation, further reducing the consumption of unnecessary air There is. In addition, by allowing the internal pressure to be adjusted freely, the intake and exhaust resistance during respiration are minimized.

In addition, in addition to controlling the amount of air flowing out of the surface, in case of emergency, since the air can be directly supplied through the bypass flow path, convenience and safety are enhanced.

Claims (11)

A nozzle configured to penetrate horizontally through the center and have a nozzle portion extending from the end of the nozzle tube vertically to form a plurality of nozzle holes communicating with the surface to receive secondary pressure air through the medium pressure hose; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the middle of the pressure detection flow path formed between the nozzle hole of the nozzle valve and the outer surface is applied with atmospheric pressure and the inner pressure of the inner surface is applied to the inner diaphragm for opening and closing the pressure resistant nozzle by the applied pressure difference. And a positive pressure type to open and close the nozzle hole of the supply nozzle from the nozzle valve by opening / closing the nozzle of the supply nozzle according to the relative magnitude of the internal pressure of the face and the atmospheric pressure at the time of inhalation and exhalation. In the air breathing system, A connecting flow path is formed therein, and is provided with a means for opening or closing the nozzle hole of the supply nozzle from the nozzle valve by connecting or blocking the nozzle valve and the pressure-resistant nozzle through the connecting flow path by rotating by an external operation force. Positive pressure air breathing system, characterized in that. The positive pressure air breathing system according to claim 1, further comprising means for accurately stopping the opening and closing means in the open position and the closed position. 3. The positive pressure air breathing system according to claim 2, further comprising means for maintaining the opening and closing means in a stopped state at an open position and a closed position before an operation force of a predetermined magnitude or more is applied from the outside. The positive pressure air breathing apparatus as claimed in claim 1, further comprising a bypass passage for bypassing the secondary pressure air through the medium pressure hose directly to the air outlet in addition to the intake passage through the nozzle hole and the nozzle valve of the supply nozzle. system. 5. The positive pressure air breathing system according to claim 4, further comprising means for controlling the amount of air through the bypass flow path. 6. The positive pressure air breathing system according to claim 5, wherein said control means comprises a throttling valve. The positive pressure type air breathing system according to claim 1, wherein the nozzle valve is formed of a valve body made of a rubber material and a metal piece inserted into the valve body by forming a nozzle hole in the center thereof. The positive pressure air breathing system according to claim 7, wherein the nozzle valve is formed by insert-extrusion molding the metal piece together with the valve body. A nozzle configured to penetrate horizontally through the center and have a nozzle portion extending from the end of the nozzle tube vertically to form a plurality of nozzle holes communicating with the surface to receive secondary pressure air through the medium pressure hose; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the middle of the pressure detection flow path formed between the nozzle hole of the nozzle valve and the outer surface is applied with atmospheric pressure and the inner pressure of the inner surface is applied to the inner diaphragm for opening and closing the pressure resistant nozzle by the applied pressure difference. And a positive pressure type to open and close the nozzle hole of the supply nozzle from the nozzle valve by opening / closing the nozzle of the supply nozzle according to the relative magnitude of the internal pressure of the face and the atmospheric pressure at the time of inhalation and exhalation. In the air breathing system, Means for controlling the amount of air through the bypass passage and the bypass passage to bypass the air of the secondary pressure through the medium pressure hose directly to the air outlet in addition to the intake passage through the nozzle hole and the nozzle valve formed in the supply nozzle Positive-pressure air breathing system, characterized in that provided with. 10. The positive pressure air breathing system according to claim 9, wherein said control means comprises a throttling valve. A nozzle configured to penetrate horizontally through the center and have a nozzle portion extending from the end of the nozzle tube vertically to form a plurality of nozzle holes communicating with the surface to receive secondary pressure air through the medium pressure hose; A nozzle valve formed of a valve body for opening and closing the nozzle hole of the supply nozzle, and a nozzle hole formed at a center thereof in communication with the nozzle tube; The internal pressure nozzle installed in the middle of the pressure detection flow path formed between the nozzle hole of the nozzle valve and the outer surface is applied with atmospheric pressure and the inner pressure of the inner surface is applied to the inner diaphragm for opening and closing the pressure resistant nozzle by the applied pressure difference. And a positive pressure type to open and close the nozzle hole of the supply nozzle from the nozzle valve by opening / closing the nozzle of the supply nozzle according to the relative magnitude of the internal pressure of the face and the atmospheric pressure at the time of inhalation and exhalation. In the air breathing system, Opening and closing handle for receiving external operation force; An opening / closing spindle axially coupled to the opening / closing handle and having a connection flow path formed between the nozzle valve and the pressure-resistant nozzle in place; A support member rotatably supporting the opening / closing handle and the opening / closing spin, and having a through hole communicating with the pressure-resistant nozzle at a position facing the rotational trajectory of the end of the connection passage of the cylindrical portion in which the body of the opening / closing spindle is received. Equipped, The nozzle hole of the supply nozzle is disconnected from the nozzle valve by connecting the body of the opening and closing spins to the through hole formed in the support member or blocking the through hole according to the rotation of the opening and closing spins linked to the operation of the opening and closing handle. Positive-pressure air breathing system, characterized in that the opening or closing.