WO2023080439A1

WO2023080439A1 - Flow rate control device for breathing apparatus

Info

Publication number: WO2023080439A1
Application number: PCT/KR2022/014064
Authority: WO
Inventors: 김영수; 김병철
Original assignee: 주식회사 케이디펜스
Priority date: 2021-11-02
Filing date: 2022-09-21
Publication date: 2023-05-11
Also published as: KR102402674B1

Abstract

A flow rate control device for a breathing apparatus according to the present invention is provided in a mask main body to be worn on the user's face to control air flow rate, the flow rate control device comprising: a housing having a housing chamber connected to an inner region of the mask main body, an inflow passage through which air is introduced, and an orifice for connecting the inflow passage and the housing chamber; a valve stem having a stem head disposed in the inflow passage to be able to open and close the orifice, and a stem body extending from the stem head such that at least a portion thereof is located in the housing chamber; a movable unit having a diaphragm that can be elastically deformed according to a pressure change in the housing chamber due to the user's inhalation or exhalation, the movable unit being capable of tilting the valve stem by pressing the stem body according to the movement of the diaphragm; and a valve stem support that supports the valve stem in a tiltable manner.

Description

Flow control device for air respirator

The present invention relates to a flow control device for an air respirator, and more particularly, to a flow control device for an air respirator provided in a mask for an air respirator and capable of adjusting the flow rate of air supplied to the mask.

In general, firefighters who extinguish a fire are supplied with air through a breathing apparatus at the scene of a fire. This breathing apparatus supplies air from an air container loaded in the form of a backpack on the back of a firefighter to a mask worn on the firefighter's face. At this time, a regulator is provided in at least one of the air box and the mask so that the air from the air box can be supplied by reducing the pressure of the air to the mask worn by the firefighter so that the high-pressure air does not cause difficulty in breathing of the firefighter. In this way, a breathing apparatus composed of an air cylinder, a mask, and a regulator is made up of a set, which is worn by a firefighter and put into a fire site to extinguish a fire or rescue lives.

In addition, structures having closed spaces, such as buildings and ships, are equipped with personal breathing apparatuses to help people breathe in the event of a fire and are used for response.

As a breathing device that supplies air to the user, a Self-Contained Breathing Apparatus (SCBA) for firefighters or a Self-Contained Underwater Breathing Apparatus (SCUBA) used by scuba divers is representative.

In general, an air respirator includes a tank for storing compressed air or oxygen, and a mask worn on a user's face to supply air or oxygen stored in the tank to the user's nose or mouth. A flow control device is installed on the mask to control the flow rate of air or oxygen supplied from the tank.

Currently, various types of flow control devices have been developed and used, but research and development are continuously being conducted to provide a flow control device that can increase the convenience of use and more stably adjust and supply the flow rate of air.

The present invention has been made in view of the above points, and an object of the present invention is to provide a flow rate control device for an air respirator capable of stably adjusting and supplying the flow rate of supplied air and with improved usability.

In order to solve the above object, the air respirator flow control device according to the present invention is provided in a mask body worn on the user's face to control the air flow rate, in the air respirator flow control device, the mask body a housing having a housing chamber connected to an inner region, an inflow passage through which air is introduced, and an orifice connecting the inflow passage and the housing chamber; a valve stem having a stem head disposed in the inflow passage to open and close the orifice, and a stem body extending from the stem head such that at least a portion thereof is located in the housing chamber; a movable unit having a diaphragm that can be elastically deformed according to a pressure change in the housing chamber caused by a user's inhalation or exhalation, and capable of tilting the valve stem by pressing the stem body according to the movement of the diaphragm; and a valve stem support configured to tiltably support the valve stem.

The valve stem support may include a spring part in the form of a coil spring, and a fixing part having one end connected to the spring part and the other end coupled to the stem head.

The fixing part may include a spirally bent fixing part wire.

The fixing part may include an engagement groove disposed concentrically with the orifice so that the head protrusion provided on the stem head is engaged.

A plurality of support pieces that can come into contact with an inner surface of the housing may be spaced apart from each other along an outer circumference of the stem head.

A fence part is provided inside the housing to partition a buffer chamber connecting the housing chamber and the orifice, and the stem body reaches the housing chamber through an opening of the fence part provided in the orifice, the buffer chamber, and the fence part. may be extended.

The movable unit may include a pusher rotatably coupled to the housing to press the stem body by rotating according to the movement of the diaphragm.

The diaphragm is provided with an exhaust port for exhausting air from the housing chamber to the outside of the housing chamber, and the flow control device for an air respirator according to the present invention is disposed outside the housing chamber so as to cover the exhaust port, An elastic pad capable of being elastically deformed to open the exhaust port according to an increase in pressure in the housing chamber caused by exhalation of the user; may be included.

The flow control device for an air respirator according to the present invention may include a control unit provided in the housing so as to pressurize the stem body through the diaphragm by a user's operation.

The flow control device for an air respirator according to the present invention is mounted on a mask worn on the user's face, supplies air to the inside of the mask when the pressure inside the mask drops when the user inhales, and supplies air to the inside of the mask when the user exhales. An increase in pressure can cut off the air supply.

In addition, the flow control device according to the present invention can open and close the orifice for air flow by a simple tilting motion of the valve stem that acts to open and close the orifice for air flow. Therefore, even if a relatively small pressure change occurs in the housing chamber while the user breathes, the valve stem can move smoothly, so that the flow rate of air can be more stably adjusted.

In addition, the flow control device according to the present invention can continuously supply air by forcibly moving the valve stem through a simple operation of the control unit, and has excellent usability.

In addition, the flow control device according to the present invention is easy to assemble the parts.

1 shows a state in which a mask equipped with a flow control device for an air respirator according to an embodiment of the present invention is connected to a storage tank.

Figure 2 is an exploded perspective view of a mask equipped with an air respirator flow control device according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing a portion of a mask equipped with a flow rate control device for an air respirator according to an embodiment of the present invention.

Figure 4 is a perspective view showing the valve stem of the air respirator flow control device according to an embodiment of the present invention.

Figure 5 is a front view showing the valve stem support of the air respirator flow control device according to an embodiment of the present invention.

Figure 6 is a side view showing a portion of the air respirator flow control device according to an embodiment of the present invention.

Figure 7 is a cross-sectional view showing the diaphragm assembly of the air respirator flow control device according to an embodiment of the present invention.

8 to 10 are for explaining the operation of the air respirator flow control device according to an embodiment of the present invention.

Hereinafter, a flow control device for an air respirator according to the present invention will be described in detail with reference to the drawings.

1 shows a state in which a mask equipped with a flow control device for an air respirator according to an embodiment of the present invention is connected to a storage tank, and FIG. 2 is provided with a flow control device for an air respirator according to an embodiment of the present invention. It is an exploded perspective view of the mask, and Figure 3 is a cross-sectional view showing a portion of the mask equipped with a flow control device for an air respirator according to an embodiment of the present invention.

As shown in the drawing, the air respirator flow control device 500 according to an embodiment of the present invention may be provided and used in the air respirator mask 400 constituting the air respirator 100. The air respirator 100 includes a storage tank 200 and a mask 400 connected to the storage tank 200 through a supply tube 300. Air or oxygen may be stored in a compressed state in the storage tank 200 .

The air respirator mask 400 includes a mask body 410 worn on the user's face, and a flow control device 500 installed on the mask body 410. One side of the mask body 410 is provided with a mask body opening 412, and a connector 414 coupled to the flow rate control device 500 is fitted into the mask body opening 412. The connector 414 may be provided with a plurality of intake/exhaust ports 416 through which air may pass. The mask body 410 may be worn on the user's face by a wearing band 418 connected thereto. When the air respirator mask 400 is worn on the user's face, the peripheral portion of the mask body 410 is in close contact with the user's face. Therefore, when the user breathes, air is introduced into the inner area of the air respirator mask 400 through the intake and exhaust ports 416 or is discharged from the inner area of the air respirator mask 400 through the intake and exhaust ports 416. can

The flow control device 500 opens and closes the housing 510 to which the supply tube 300 is connected and the orifice 528 provided in the housing 510 so that air supplied through the supply tube 300 can pass. It includes a valve stem 540 for moving the valve stem 540, a movable unit 560 for moving the valve stem 540, and a control unit 593 for user manipulation. The flow control device 500 can adjust the flow rate or pressure of air supplied to the inner region of the mask body 410 by opening and closing the orifice 528 with the valve stem 540 or changing the opening amount of the orifice 528. there is.

The housing 510 includes a housing base 511, a housing cover 520 coupled to one side of the housing base 511, and a housing tube 524 connected to the other side of the housing base 511.

The housing base 511 has a hollow shape with both sides open. A housing chamber 512 connected to an inner region of the mask body 410 is provided inside the housing base 511 . A through hole 513 connected to the housing chamber 512 and opened to the outside of the housing base 511 is provided at one side of the housing base 511 . A housing tube 524 connected to the supply tube 300 is connected to the through hole 513 .

A buffer chamber 515 is provided between the housing chamber 512 and the through hole 513 . The buffer chamber 515 is partitioned by the fence part 516 provided inside the housing base 511 . At least a portion of the fence part 516 is disposed to face the through hole 513 . Air passing through the housing tube 524 may flow into the housing chamber 512 via the buffer chamber 515 . One side of the fence part 516 is provided with a fence part opening 517 in which a part of the valve stem 540 is placed. A chamber cover 518 is coupled to one side of the fence unit 516 , and an open side of the fence unit 516 is covered by the chamber cover 518 . While the air introduced through the housing tube 524 passes through the buffer chamber 515 , a flow path of some of the air is changed and the flow velocity is reduced so that it may be introduced into the housing chamber 512 . As such, since the flow rate of air introduced into the housing chamber 512 is reduced due to the buffer chamber 515, noise caused by the air flow can be reduced.

The housing cover 520 may be coupled to the housing base 511 to cover an open portion of the housing base 511 . The housing cover 520 includes an outlet 521 and a housing opening 522 . The outlet 521 is for discharging air and may be provided in plurality along the circumference of the housing opening 522 . The housing opening 522 is for installation of the control unit 593. The control unit 593 may be coupled to the housing cover 520 to cover the housing opening 522 .

The housing tube 524 is coupled to the housing base 511 and guides air supplied through the supply tube 300 to the inside of the housing base 511 . An inflow passage 525 through which air can pass is provided inside the housing tube 524 . Air supplied through the supply tube 300 may pass through the inflow passage 525 and be introduced into the housing base 511 . A housing bushing 527 is disposed inside the housing tube 524 . The housing bushing 527 includes a seat portion 529 in which an orifice 528 is formed. The orifice 528 is formed at the center of the seat portion 529 to penetrate the housing bushing 527 . Air in the inflow passage 525 may flow into the housing base 511 through the orifice 528 . Orifice 528 may be opened and closed by valve stem 540 . The orifice 528 may be closed when the valve stem 540 is in close contact with the seat portion 529 , and the orifice 528 may be opened when at least a portion of the seat portion 529 is separated from the valve stem 540 . The housing bushing 527 may be made of an elastically deformable material so that the seat portion 529 may stably come into close contact with the valve stem 540 .

The housing tube 524 may be connected to the supply tube 300 through a coupler 587. A flow path 588 through which air can pass is provided inside the coupler 587 . The coupler 587 may be fixed to the housing tube 524 by a fixing cap 590 . The fixed cap 590 has a cap hole 591 into which a portion of the coupler 587 is inserted. A filter 585 may be disposed between the housing bushing 527 and the coupler 587 to filter air introduced into the inflow passage 525 .

A specific configuration of the housing 510 is not limited to that shown and may be variously changed. As another exemplary embodiment, the housing 510 may take a configuration in which the housing base 511 and the housing tube 524 are integrally formed. In addition, a seat portion 529 integrated with the housing tube 524 may be provided inside the housing tube 524 . In this case, a separate housing bushing 527 coupled to the housing tube 524 may be omitted. In addition, the housing 510 may take a configuration in which the housing base 511 and the housing cover 520 are integrally formed.

Referring to FIGS. 2 to 6 , the valve stem 540 is tiltably installed in the housing 510 to open and close the orifice 528 . The valve stem 540 includes a stem head 541 disposed in the inflow passage 525 to open and close the orifice 528 and a stem body 545 extending from the stem head 541 . One end of the stem head 541 is provided with a shielding unit 542 that can shield the orifice 528 by contacting the seat unit 529 . The shielding part 542 may be formed in various shapes that can be stably adhered to the seat part 529 . A head protrusion 543 coupled to the valve stem support 550 is provided at an end of the stem head 541 . Stem body 545 extends from stem head 541 so that at least a portion is located in housing chamber 512 . In the valve stem 540, the stem head 541 is located in the inflow passage 525 and the stem head 541 passes through the orifice 528, the buffer chamber 515, and the fence opening 517 to form a housing chamber 512. It may be installed in the housing 510 so as to be positioned at.

A support ring 547 is disposed around the outer circumference of the stem head 541 . The support ring 547 is coupled to the stem head 541 in a form surrounding the stem head 541 . A support ring opening 548 into which the stem head 541 is inserted is provided at the center of the support ring 547, and a plurality of support pieces 549 are provided around the outer circumference of the support ring 547. A plurality of support pieces 549 are spaced apart along the outer circumference of the stem head 541 . When the valve stem 540 is tilted, the support ring 547 may limit the movement of the valve stem 540 by contacting the inner surface of the housing 510 with the support piece 549 . A gap may be formed between an inner surface of the housing 510 and at least a portion of the support ring 547 in a state in which the stem head 541 closes the orifice 528 . When the valve stem 540 is tilted, the support piece 549 may come into contact with the inner surface of the housing 510 and be elastically deformed. Due to the operation of the support ring 547, the valve stem 540 can be stably tilted within a preset angle range, and the orifice 528 can be opened and closed more stably. The plurality of support pieces 549 may be integrally provided with the stem head 541 . In this case, the support ring 547 manufactured separately from the valve stem 540 may be omitted. In addition, the shape or number of support pieces 549 may be variously changed.

The valve stem 540 is tiltably supported by the valve stem support 550 . Referring to FIGS. 3, 5 and 6 , the valve stem support 550 is disposed in the inflow passage 525 so that the longitudinal central axis of the valve stem 540 is concentric with the central axis of the orifice 528 . (540) can be supported. The valve stem support 550 includes an elastically deformable spring part 551 and a fixing part 554 having one end connected to the spring part 551 and the other end coupled to the stem head 541 . The spring part 551 may be formed in the form of a coil spring in which a spring part wire 552 is wound in a cylindrical shape. The fixing part 554 includes a spirally bent fixing part wire 555 . The fixing wire 555 forms an engagement groove 556 engaged with the valve stem 540 . The engagement groove 556 may be disposed at the center of the spring part 551 so as to be concentrically disposed with the orifice 528 . The head protrusion 543 of the valve stem 540 is engaged with the engagement groove 556 . The valve stem 540 and the valve stem support 550 are coupled in such a way that the head protrusion 543 engages the engagement groove 556 . The valve stem support 550 may elastically support the valve stem 540 . When the valve stem 540 is tilted by the movable unit 560, the valve stem support 550 is elastically deformed. Further, when the pressing force of the movable unit 560 on the valve stem 540 is removed, the valve stem support 550 may return to its original state while restoring the valve stem 540 to its original state. When no other external force is applied to the valve stem 540 , the valve stem 540 is supported by the valve stem support 550 to keep the orifice 528 closed.

Since the valve stem 540 is supported by the elastically deformable valve stem support 550, it can be tilted with a relatively small force. Accordingly, it is possible to open and close the orifice 528 by moving the valve stem 540 even when a relatively small pressure change occurs in the housing chamber 512 while the user breathes. When manufacturing the valve stem support 550, for tilting the valve stem 540 in a way that variously changes the stiffness of the spring part wire 552 or the fixed part wire 555 constituting the valve stem support 550 The strength of the minimum force can be set in various ways.

Configurations of the valve stem 540 and the valve stem support 550 are not limited to those shown and may be variously changed. That is, the valve stem 540 may be changed to various other tiltable configurations to open and close the orifice 528 . In addition, the valve stem support 550 may be changed to various other configurations capable of tiltably supporting the valve stem 540 .

Referring to FIGS. 2 , 3 and 7 , the movable unit 560 is installed in the housing 510 to tilt the valve stem 540 by pressing the stem body 545 . The movable unit 560 includes a diaphragm assembly 561 and a pusher 571 connected to the diaphragm assembly 561 .

The diaphragm assembly 561 includes a diaphragm 562 covering the housing chamber 512 and a reinforcing plate 565 coupled to the diaphragm 562 . The diaphragm 562 may be elastically deformed according to a pressure change in the housing chamber 512 caused by a user's inhalation or exhalation. The outer edge of the diaphragm 562 may be coupled to the housing 510 by being sandwiched between the housing base 511 and the housing chamber 512 . An exhaust port 563 for exhausting air from the housing chamber 512 to the outside of the housing chamber 512 is provided at a middle portion of the diaphragm 562 . The exhaust port 563 may be opened and closed by an elastic pad 580 coupled to the diaphragm 562 . The reinforcing plate 565 may be coupled to the inner surface of the diaphragm 562 to reinforce the strength of the diaphragm 562 . The reinforcing plate 565 is provided with a reinforcing plate opening 566 corresponding to the exhaust port 563 of the diaphragm 562 . Air in the housing chamber 512 may be exhausted to the outside of the housing chamber 512 through the reinforcement plate opening 566 and the exhaust port 563 . A connecting rod 568 is provided at a central portion of the reinforcing plate 565 . The connecting rod 568 protrudes toward the pusher 571. The connecting rod 568 includes a protrusion 569 coupled to the pusher 571 .

The specific configuration of each of the diaphragm 562 and the reinforcing plate 565 is not limited to those shown and may be variously changed. For example, the shape or number of exhaust ports 563 provided in the diaphragm 562 and the shape or number of reinforcement plate openings 566 provided in the reinforcing plate 565 may be variously changed. As another exemplary embodiment, the connecting rod 568 connected to the pusher 571 may be integrally formed with the diaphragm 562 . In this case, the reinforcing plate 565 manufactured separately from the diaphragm 562 may be omitted, and the portion of the diaphragm 562 where the exhaust port 563 is formed may have greater strength than other portions of the diaphragm 562 .

The pusher 571 may be tilted according to the movement of the diaphragm 562 to press the stem body 545 . The pusher 571 is tiltably coupled to the support 531 provided inside the housing 510 . The pusher 571 includes a pusher body 572 and a hinge part 573 coupled to the support 531 . The support 531 may be integrally provided with the housing base 511 or the housing cover 520 . The pusher body 572 may rotate about the hinge part 573 within a preset rotational angle range. The pusher body 572 includes a coupling groove 574 into which the protrusion 569 of the connecting rod 568 is inserted, and an insertion groove 575 into which the stem body 545 is inserted. The diaphragm 562 and the pusher 571 may be connected by inserting the protrusion 569 of the connecting rod 568 into the coupling groove 574 . In addition, as the stem body 545 is inserted into the insertion groove 575, the movement of the stem body 545 may be restricted. Since the movement of the stem body 545 is restricted, it is possible for the pusher 571 to stably press the stem body 545 in a preset direction.

The pusher 571 may be changed to various other configurations capable of pressurizing the valve stem 540 in conjunction with the movement of the diaphragm 562 other than the illustrated configuration. As another exemplary embodiment, the pusher 571 is not connected to the diaphragm 562 and is pressed by the diaphragm 562 and rotated at a certain angle, and then can be restored to its original state when the pressing force by the diaphragm 562 is removed. configuration can be taken. As a component for restoring the pusher 571 to its original state, various elements such as a spring or an elastic body may be used. In addition, although the drawing shows that the hinge part 573 of the pusher 571 is formed in the form of a protrusion protruding from the pusher body 572, the hinge part has various other shapes that can be rotatably coupled to the housing 510, such as a groove shape. shape can be changed.

An elastic pad 580 is coupled to the diaphragm assembly 561 to cover the exhaust port 563 on the outside of the housing chamber 512 . The elastic pad 580 may open and close the exhaust port 563 in an elastically deformed manner. As shown in (a) of FIG. 7 , the elastic pad 580 may cover the exhaust port 563 to block air exhaust through the exhaust port 563 . Also, as shown in (b) of FIG. 7 , the elastic pad 580 may open the exhaust port 563 by being elastically deformed. That is, when the pressure of the housing chamber 512 increases to a predetermined level or more due to the user's exhalation, the elastic pad 580 is elastically deformed by the pressure of the housing chamber 512 to open the exhaust port 563. At this time, air in the housing chamber 512 may be exhausted to the outside of the housing chamber 512 through the exhaust port 563 . The elastic pad 580 includes an elastic pad rod 581 , and the elastic pad rod 581 may be coupled to the diaphragm assembly 561 in a manner in which the reinforcing plate 565 is fitted.

A specific configuration of the elastic pad 580 is not limited to that shown and may be variously changed. Also, the elastic pad 580 may be coupled to the diaphragm assembly 561 in a variety of other ways than shown.

Referring to FIGS. 2 and 3 , the control unit 593 is coupled to the housing cover 520 so that it can be operated by a user. The control unit 593 is coupled to the housing cover 520 to cover the housing opening 522 . The control unit 593 may be moved by a user's manipulation to forcibly move the diaphragm 562 . The control unit 593 includes a button 594 exposed to the outside of the housing 510 for user manipulation, a pressing protrusion 595 protruding from the button 594 toward the diaphragm 562, and a housing cover 520. ) and includes an elastic support 596 for supporting the button 594. The elastic support 596 may be elastically deformed. When the user presses the button 594, the pressing protrusion 595 presses the diaphragm 562 toward the pusher 571, so that the pusher 571 tilts the valve stem 540. At this time, the orifice 528 is opened so that air supplied through the supply tube 300 may flow into the housing chamber 512 . And, when the pressing force on the button 594 is removed, the pressing protrusion 595 is returned to its original state by the elastic support 596, and the diaphragm 562, the pusher 571, and the valve stem 540 are also restored to their original state, so that the orifice ( Air flow through 528) is blocked.

The control unit 593 may be changed to various other configurations capable of moving the diaphragm 562 by being operated by a user other than the illustrated configuration.

Hereinafter, the operation of the air respirator flow control device 500 according to an embodiment of the present invention will be described.

As shown in FIG. 3 , when the mask 400 is not worn on the user's face, since the pressure change in the housing chamber 512 does not substantially occur, the valve stem 540 closes the orifice 528. is maintained as

Meanwhile, when the mask 400 is worn on the user's face, the pressure in the housing chamber 512 changes as the user breathes, so that the movable unit 560 operates and the valve stem 540 moves.

As shown in FIG. 8, when the user inhales, the pressure in the housing chamber 512 drops and the diaphragm 562 moves so that the portion provided with the connecting rod 568 of the diaphragm 562 approaches the user's face. It is deformed elastically. Further, as the diaphragm 562 is elastically deformed, the pusher 571 works with the diaphragm 562 to press the stem body 545 and the valve stem 540 is tilted. At this time, the stem head 541 is separated from at least a portion of the seat portion 529 and a gap is created between the stem head 541 and the seat portion 529 . As the orifice 528 is opened in this way, air introduced into the inflow passage 525 flows into the housing chamber 512 via the orifice 528 and the buffer chamber 515 . Accordingly, air supplied from the supply tube 300 may be supplied to the inner region of the mask body 410 .

Meanwhile, as shown in FIG. 9 , when the user exhales, the diaphragm 562, the pusher 571, and the valve stem 540 are restored to their original state, the orifice 528 is closed, and the pressure in the housing chamber 512 increases. will do When the pressure in the housing chamber 512 increases to a predetermined level or more, the elastic pad 580 is elastically deformed and the exhaust port 563 is opened. At this time, air in the housing chamber 512 may be exhausted to the outside of the housing chamber 512 through the exhaust port 563 .

As such, the valve stem 540 moves to open and close the orifice 528 according to the pressure change in the housing chamber 512 caused by the user's inhalation and exhalation, and air supply and air exhaust operations can be performed alternately. .

Meanwhile, as shown in FIG. 10 , when the user presses the button 594 of the control unit 593, the pressure protrusion 595 moves the diaphragm 562, so that the valve stem 540 opens the orifice 528. At this time, the air introduced into the inflow passage 525 may be continuously supplied to the user. In this case, the elastic pad 580 is elastically deformed to open the exhaust port 563 when the user exhales, or is elastically deformed by the pressure of air continuously flowing into the housing chamber 512 to open the exhaust port 563. one state can be maintained.

The mask 400 having the flow control device 500 according to an embodiment of the present invention can be used as an auxiliary breathing mask used to rescue a victim. When the rescued person wearing the mask 400 is in a state of unconsciousness and is unable to breathe independently, it is possible for the rescuer to forcibly supply air to the rescued person by manipulating the control unit 593 as described above.

As described above, in the flow control device 500 according to an embodiment of the present invention, the valve stem 540 for opening and closing the orifice 528 for air flow can open and close the orifice 528 by a simple tilting motion. there is. Accordingly, even when a relatively small pressure change occurs in the housing chamber 512 while the user breathes, the valve stem 540 can move, so that the air flow rate can be stably controlled and supplied.

In addition, the flow control device 500 according to an embodiment of the present invention can continuously supply air by moving the valve stem 540 through a simple manipulation of the control unit 593.

In addition, the flow control device 500 according to an embodiment of the present invention is easy to assemble the parts.

Although the preferred examples of the present invention have been described above, the scope of the present invention is not limited to the forms described and illustrated above.

For example, although the drawing shows that the movement of the diaphragm 562 is transmitted to the valve stem 540 through the pusher 571, the diagram shows a configuration in which the diaphragm 562 directly moves the valve stem 540. possible. In this case, the pusher 571 linked to the diaphragm 562 may be omitted.

In addition, the flow control device 500 according to the present invention can be applied to an auxiliary breathing mask used to rescue a victim or various masks that can be worn on the user's face to supply air.

In the above, the present invention has been shown and described in relation to preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the configuration and operation as shown and described. Rather, it will be appreciated by those skilled in the art that many changes and modifications may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

In the air respirator flow control device provided in the mask body worn on the user's face to control the air flow rate,

a housing having a housing chamber connected to an inner region of the mask body, an inflow passage through which air is introduced, and an orifice connecting the inflow passage and the housing chamber;

a valve stem having a stem head disposed in the inflow passage to open and close the orifice, and a stem body extending from the stem head such that at least a portion thereof is located in the housing chamber;

a movable unit having a diaphragm that can be elastically deformed according to a pressure change in the housing chamber caused by a user's inhalation or exhalation, and capable of tilting the valve stem by pressing the stem body according to the movement of the diaphragm; and

Air respirator flow rate control device comprising a; valve stem support for tiltably supporting the valve stem.
According to claim 1,

The valve stem support,

A spring part in the form of a coil spring;

An air respirator flow control device comprising a fixing part having one side connected to the spring part and the other side coupled to the stem head.
According to claim 2,

The air respirator flow control device, characterized in that the fixing portion comprises a spirally bent fixing wire.
According to claim 3,

The fixing part includes an engaging groove concentrically disposed with the orifice so that the head protrusion provided on the stem head can be engaged.
According to claim 1,

An air respirator flow control device, characterized in that, on the outer circumference of the stem head, a plurality of support pieces that can come into contact with the inner surface of the housing are spaced apart along the outer circumference of the stem head.
According to claim 1,

A fence part is provided inside the housing to partition a buffer chamber connecting the housing chamber and the orifice,

The stem body is an air respirator flow control device, characterized in that extending to the housing chamber through the orifice and the buffer chamber and the fence portion opening provided in the fence portion.
According to claim 1,

The movable unit,

An air respirator flow control device comprising a pusher rotatably coupled to the housing so as to rotate according to the movement of the diaphragm and pressurize the stem body.
According to claim 1,

The diaphragm is provided with an exhaust port for exhausting air from the housing chamber to the outside of the housing chamber,

An elastic pad disposed outside the housing chamber to cover the exhaust port, elastically deformed according to the pressure increase of the housing chamber by user's exhalation to open the exhaust port; for an air respirator comprising a flow regulator.
According to claim 1,

An air respirator flow control device comprising a; operation unit provided in the housing so as to pressurize the stem body through the diaphragm moved by a user operation.