KR102402674B1 - Flow regulating device for breathing apparatus - Google Patents

Abstract

The present invention relates to a flow regulation device for a breathing apparatus, which is installed in a mask body worn on the face of a user to control the flow rate of air. According to the present invention, the flow regulation device comprises: a housing including a housing chamber which is connected to the inner region of a mask body, an inflow passage through which air is introduced, and an orifice which connects the inflow passage and the housing chamber; a valve stem including a stem head which is disposed in the inflow passage to open and close the orifice and a stem body which extends from the stem head so that at least a part thereof is located in the housing chamber; a moving unit including a diaphragm which is elastically deformed according to a pressure change in the housing chamber caused by the user's inhalation or exhalation, and pressing the stem body according to movement of the diaphragm to tilt the valve stem; and a valve stem support supporting the valve stem in a tiltable manner.

Description

FLOW REGULATING DEVICE FOR BREATHING APPARATUS

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

In general, firefighters extinguishing a fire are supplied with air through a breathing apparatus at the scene of the fire. Such a breathing apparatus supplies air from a reservoir loaded in the form of a backpack on the firefighter's back to a mask worn on the firefighter's face. At this time, a regulator is provided in at least one of the air tank or the mask so that the air in the air tank can be supplied by reducing the pressure to the mask worn by the firefighter so as not to cause difficulty in breathing of the firefighter due to the high-pressure air. In this way, the breathing apparatus consisting of a reservoir, a mask, and a regulator is made up of one set, worn by a firefighter, and put into a fire scene to extinguish a fire or save lives.

In addition, structures with closed spaces, such as buildings and ships, are equipped with personal breathing apparatuses to help people breathe in case of fire and are sometimes used for countermeasures.

In general, firefighters extinguishing a fire are supplied with air through a breathing apparatus at the scene of the fire. Such a breathing apparatus supplies air from a reservoir loaded in the form of a backpack on the firefighter's back to a mask worn on the firefighter's face. At this time, a regulator is provided in at least one of the air tank or the mask so that the air in the air tank can be supplied by reducing the pressure to the mask worn by the firefighter so as not to cause difficulty in breathing of the firefighter due to the high-pressure air. In this way, the breathing apparatus consisting of a reservoir, a mask, and a regulator is made up of one set, worn by a firefighter, and put into a fire scene to extinguish a fire or save lives.

In addition, structures with closed spaces, such as buildings and ships, are equipped with personal breathing apparatuses to help people breathe in case of fire and are sometimes used for countermeasures.

As a breathing device that supplies air to the user, a firefighter's self-contained breathing apparatus (SCBA) or a scuba diver's underwater breathing apparatus (SCUBA: Self-Contained Underwater Breathing Apparatus) are representative.

In general, an air respirator includes a tank in which compressed air or oxygen is stored, and a mask that is worn on a user's face and supplies the air or oxygen stored in the tank to the user's nose or mouth. The mask is equipped with a flow control device that can 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 made to improve the usability and provide a flow control device that can control and supply the flow rate of air more stably.

Korean Patent Laid-Open Patent No. 2021-0056684 (2021.05.20)

The present invention has been devised in view of the above-described points, and an object of the present invention is to provide a flow rate control device for an air respirator that can be supplied by stably adjusting the flow rate of supplied air, and has improved ease of use.

The flow control device for an air respirator according to the present invention for solving the above object is a flow control device for an air respirator that is provided in a mask body worn on a user's face to control the air flow rate, a housing having a housing chamber connected to the 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 so that at least a portion is located in the housing chamber; a movable unit having a diaphragm that can be elastically deformed according to a change in pressure of the housing chamber due to the user's inhalation or exhalation, and tilting the valve stem by pressing the stem body according to the movement of the diaphragm; and a valve stem support for tiltably supporting 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 side connected to the spring part and the other side coupled to the stem head.

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

The fixing part may include an engaging groove concentric with the orifice so that a head protrusion provided on the stem head can be engaged.

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

A fence portion for partitioning a buffer chamber connecting the housing chamber and the orifice is provided inside the housing, and the stem body extends to the housing chamber through the orifice, the buffer chamber, and a fence portion opening provided in the fence portion. can be extended

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

The diaphragm is provided with an exhaust port for exhausting the air of 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 to cover the exhaust port, and an elastic pad that is elastically deformed according to an increase in pressure of the housing chamber by the user's exhalation to open the exhaust port.

The flow control device for an air respirator according to the present invention may include a manipulation unit provided in the housing to press the stem body through the diaphragm by moving it by a user manipulation.

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

In addition, in the flow control device according to the present invention, the valve stem that acts to open and close the orifice for air flow can open and close the orifice by a simple tilting motion. Therefore, even if the pressure change in the housing chamber is relatively small while the user is breathing, the valve stem can move smoothly and the air flow rate 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 operation unit, and is excellent in ease of use.

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.
2 is an exploded perspective view of a mask provided with a flow control device for an air respirator according to an embodiment of the present invention.
3 is a cross-sectional view showing a portion of a mask provided with a flow control device for an air respirator according to an embodiment of the present invention.
4 is a perspective view showing a valve stem of a flow control device for an air respirator according to an embodiment of the present invention.
5 is a front view showing the valve stem support of the flow control device for an air respirator according to an embodiment of the present invention.
6 is a side view showing a part of the flow control device for an air respirator according to an embodiment of the present invention.
7 is a cross-sectional view showing the diaphragm assembly of the flow control device for an air respirator according to an embodiment of the present invention.
8 to 10 are for explaining the operation of the flow control device for air respirator 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 provided with a flow rate 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 rate control device for an air respirator according to an embodiment of the present invention. It is an exploded perspective view of the mask, and FIG. 3 is a cross-sectional view showing a part of the mask provided with a flow control device for an air respirator according to an embodiment of the present invention.

As shown in the drawings, the flow rate control device 500 for an air respirator 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 . In the storage tank 200, air or oxygen may be stored in a compressed state.

The air respirator mask 400 includes a mask body 410 worn on the user's face, and a flow rate control device 500 installed on the mask body 410 . A mask body opening 412 is provided at one side of the mask body 410 , and a connector 414 to which the flow rate control device 500 is coupled is fitted to the mask body opening 412 . The connector 414 may be provided with a plurality of intake and 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 port 416, or is discharged from the inner area of the air respirator mask 400 through the intake and exhaust port 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 the air supplied through the supply tube 300 passes. It includes a valve stem 540 for, a movable unit 560 for moving the valve stem 540, and an operation unit 593 for user operation. The flow control device 500 can control the flow rate or pressure of the 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 degree of the orifice 528. have.

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 a fence part 516 provided inside the housing base 511 . At least a portion of the fence unit 516 is disposed to face the through hole 513 . Air passing through the housing tube 524 may be introduced into the housing chamber 512 through 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 . In the process in which the air introduced through the housing tube 524 passes through the buffer chamber 515 , a flow path of some air is changed and the flow rate is reduced, so that the air may be introduced into the housing chamber 512 . As such, the flow rate of the air introduced into the housing chamber 512 is reduced due to the buffer chamber 515 , so that 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 is provided with an outlet 521 and a housing opening 522 . The exhaust port 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 operation unit 593 . The manipulation 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 to guide air supplied through the supply tube 300 to the inside of the housing base 511 . An inflow passage 525 through which air may pass is provided inside the housing tube 524 . Air supplied through the supply tube 300 may be introduced into the housing base 511 through the inflow passage 525 . 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 to pass through the housing bushing 527 in the central portion of the seat portion 529 . Air of the inflow passage 525 may flow into the housing base 511 through the orifice 528 . The orifice 528 may be opened and closed by the 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 spaced apart from the valve stem 540 . The housing bushing 527 may be made of an elastically deformable material so that the seat portion 529 can be stably in 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 secured 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 flowing into the inflow passage 525 .

The specific configuration of the housing 510 is not limited to the illustrated one and may be variously changed. As another exemplary embodiment, the housing 510 may have a configuration in which the housing base 511 and the housing tube 524 are integrally formed. Also, a seat portion 529 integral 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. Also, the housing 510 may have a configuration in which the housing base 511 and the housing cover 520 are integrally formed.

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 . At one end of the stem head 541 , a shielding portion 542 capable of shielding the orifice 528 by contacting the seat portion 529 is provided. The shielding part 542 may be formed in various shapes that can be stably adhered to the sheet part 529 . A head protrusion 543 coupled to the valve stem support 550 is provided at an end of the stem head 541 . The stem body 545 extends from the stem head 541 such that at least a portion is located in the 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 the housing chamber 512. It may be installed in the housing 510 so as to be located in the .

A support ring 547 is disposed around the outer periphery 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 in a central portion of the support ring 547 , and a plurality of support pieces 549 are provided on the outer periphery of the support ring 547 . A plurality of support pieces 549 are spaced apart along the outer circumference of the stem head 541 . The support ring 547 may limit the movement of the valve stem 540 by allowing the support piece 549 to contact the inner surface of the housing 510 when the valve stem 540 is tilted. In a state in which the stem head 541 closes the orifice 528 , a gap may be formed between the inner surface of the housing 510 and at least a portion of the support ring 547 . The support piece 549 may have a configuration that can be elastically deformed in contact with the inner surface of the housing 510 when the valve stem 540 is tilted. By the action of the support ring 547 , the valve stem 540 can be tilted stably 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 the support pieces 549 may be variously changed.

The valve stem 540 is tiltably supported by the valve stem support 550 . 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 side connected to the spring part 551 and the other side coupled to the stem head 541 . The spring part 551 may be formed in the form of a coil spring in which the spring part wire 552 is wound in a cylindrical shape. The fixture 554 includes a helically curved fixture wire 555 . The fixing wire 555 forms an engagement groove 556 engaged with the valve stem 540 . The engaging groove 556 may be disposed in the central portion of the spring portion 551 so as to be concentric with the orifice 528 . The head protrusion 543 of the valve stem 540 is engaged with the engaging 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 engaging 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. And when the pressing force of the movable unit 560 with respect to the valve stem 540 is removed, the valve stem support 550 may restore the valve stem 540 to its original state while being restored to its original state. When no other external force is applied to the valve stem 540 , the valve stem 540 may be supported by the valve stem support 550 to maintain the closed state of the orifice 528 .

Since the valve stem 540 is supported by the elastically deformable valve stem support 550 , it can be tilted by a relatively small force. Accordingly, even if a relatively small change in pressure of the housing chamber 512 occurs while the user breathes, the valve stem 540 moves to open and close the orifice 528 . When manufacturing the valve stem support 550, for tilting the valve stem 540 in a manner that variously changes the rigidity of the spring wire 552 or the fixing wire 555 constituting the valve stem support 550. The minimum force intensity can be set variously.

The configuration of each of the valve stem 540 and the valve stem support 550 is not limited to the illustrated ones and may be variously changed. That is, the valve stem 540 may be changed to a variety of 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 .

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 change in pressure of the housing chamber 512 by the user's inhalation or exhalation. The diaphragm 562 may be coupled to the housing 510 by having an outer edge portion thereof sandwiched between the housing base 511 and the housing chamber 512 . An exhaust port 563 for exhausting the air of the housing chamber 512 to the outside of the housing chamber 512 is provided in the 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 of the housing chamber 512 may be exhausted to the outside of the housing chamber 512 through the reinforcing 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 that engages the pusher 571 .

The specific configuration of each of the diaphragm 562 and the reinforcing plate 565 is not limited to the illustrated ones 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 reinforcing 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 formed integrally with the diaphragm 562 . In this case, the reinforcing plate 565 manufactured separately from the diaphragm 562 may be omitted, and the diaphragm 562 may be formed so that the portion where the exhaust port 563 is formed has greater strength than other portions.

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 portion 573 coupled to the support 531 . The support 531 may be provided integrally with the housing base 511 or the housing cover 520 . The pusher body 572 may rotate within a preset rotation angle range with respect to the hinge part 573 . 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. As the protrusion 569 of the connecting rod 568 is inserted into the coupling groove 574 , the diaphragm 562 and the pusher 571 may be connected. And by inserting the stem body 545 into the insertion groove 575, the movement of the stem body 545 may be limited. 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.

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

The elastic pad 580 is coupled to the diaphragm assembly 561 to cover the exhaust port 563 from 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 the exhaust of air through the exhaust port 563 . And, as shown in (b) of FIG. 7 , the elastic pad 580 may be elastically deformed to open the exhaust port 563 . That is, when the pressure of the housing chamber 512 increases by more than a preset size due to the user's exhalation, the elastic pad 580 may be elastically deformed by the pressure of the housing chamber 512 to open the exhaust port 563 . In this case, the air of the housing chamber 512 may be exhausted to the outside of the housing chamber 512 through the exhaust port 563 . The elastic pad 580 may include an elastic pad rod 581 , and may be coupled to the diaphragm assembly 561 in such a way that the elastic pad rod 581 is fitted to the reinforcing plate 565 .

The specific configuration of the elastic pad 580 is not limited to the illustrated one 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 those shown.

2 and 3 , the manipulation unit 593 is coupled to the housing cover 520 to be manipulated by the user. The manipulation unit 593 is coupled to the housing cover 520 to cover the housing opening 522 . The manipulation unit 593 may forcibly move the diaphragm 562 by moving it by a user manipulation. The manipulation 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 to face 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 may tilt the valve stem 540 . At this time, the orifice 528 is opened so that air supplied through the supply tube 300 may be introduced 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 and the orifice ( 528) is blocked.

In addition to the illustrated configuration, the manipulation unit 593 may be changed into various other configurations in which the diaphragm 562 can be moved by being manipulated by the user.

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

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

On the other hand, in a state in which the mask 400 is worn on the user's face, as the user breathes, the pressure of the housing chamber 512 changes, so that the movable unit 560 operates to move the valve stem 540 .

As shown in FIG. 8, when the user breathes in, the pressure of the housing chamber 512 drops and the portion provided with the connecting rod 568 of the diaphragm 562 approaches the user's face. It is elastically deformed. And as the diaphragm 562 is elastically deformed, the pusher 571 interlocks 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 flowing into the inflow passage 525 flows into the housing chamber 512 through the orifice 528 and the buffer chamber 515 . Accordingly, the air supplied from the supply tube 300 may be supplied to the inner region of the mask body 410 .

On the other hand, when the user exhales as shown in Figure 9, 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 of the housing chamber 512 rises. will do When the pressure of the housing chamber 512 becomes greater than a preset size, the elastic pad 580 is elastically deformed to open the exhaust port 563 . In this case, the air of the housing chamber 512 may be exhausted to the outside of the housing chamber 512 through the exhaust port 563 .

In this way, the orifice 528 is opened and closed by moving the valve stem 540 according to the change in pressure of the housing chamber 512 by the user's inhalation and exhalation, and air supply and air exhaust operations may be alternately performed. .

On the other hand, as shown in FIG. 10 , when the user presses the button 594 of the operation unit 593 , the pressure protrusion 595 moves the diaphragm 562 so that the valve stem 540 opens the orifice 528 . In this case, 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 when the user exhales to open the exhaust port 563 , or is elastically deformed by the pressure of air continuously flowing into the housing chamber 512 to open the exhaust port 563 . can maintain one state.

The mask 400 having the flow rate control device 500 according to an embodiment of the present invention may be used as an auxiliary breathing mask used to rescue the rescued. When the rescuer wearing the mask 400 becomes unconscious and cannot breathe by himself, it is possible to forcibly supply air to the rescuer by manipulating the operation unit 593 as described above by the rescuer.

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 movement. have. Therefore, even when the pressure change of the housing chamber 512 occurs relatively small while the user breathes, the movement of the valve stem 540 is possible, so that the air flow rate can be stably adjusted 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 operation of the operation unit 593 .

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

Although 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, in the drawing, it is shown that the movement of the diaphragm 562 is transmitted to the valve stem 540 through the pusher 571 , but the diaphragm 562 directly moves the valve stem 540 . It is possible. In this case, the pusher 571 interlocking with the diaphragm 562 may be omitted.

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

In the foregoing, the present invention has been shown and described in connection with preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the construction and operation as shown and described as such. Rather, it will be apparent to those skilled in the art that many changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims.

100: respirator 200: storage tank
300: supply tube 400: mask
410: mask body 412: mask body opening
414: connector 416: intake and exhaust port
418: wear band 500: flow control device
510: housing 511: housing base
512: housing chamber 513: through hole
515: buffer chamber 516: fence unit
517: fence opening 518: chamber cover
520: housing cover 521: outlet
522 housing opening 524 housing tube
525: inlet flow path 527: housing bushing
528: orifice 529: seat portion
531: support 540: valve stem
541: stem head 542: shield
543: head projection 545: stem body
547: support ring 548: support ring opening
549: support piece 550: valve stem support
551: spring part 552: spring part wire
554: fixed portion 555: fixed portion wire
556: engaging groove 560: movable unit
561: diaphragm assembly 562: diaphragm
563: exhaust port 565: reinforcing plate
566: reinforcing plate opening 568: connecting rod
569: protrusion 571: pusher
572: pusher body 573: hinge part
574: coupling groove 575: insertion groove
580: elastic pad 581: elastic pad rod
585: filter 587: coupler
588: Euro 590: Fixed cap
591: cap hole 593: control unit
594: button 595: pressure projection
596: elastic support

Claims (9)

In the flow control device for an air respirator 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 the 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 so that at least a portion is located in the housing chamber;
a movable unit having a diaphragm that can be elastically deformed according to a change in pressure of the housing chamber due to a user's inhalation or exhalation, and tilting the valve stem by pressing the stem body according to the movement of the diaphragm; and
Including; a valve stem support for tiltably supporting the valve stem;
A plurality of support pieces that can be elastically deformed in contact with the inner surface of the housing when the valve stem is tilted are disposed at an outer circumference of the stem head and spaced apart along the outer circumference of the stem head. .
The method of claim 1,
The valve stem support is
A spring part in the form of a coil spring,
One side is connected to the spring unit and the other side is a flow control device for air respirator, characterized in that it comprises a fixing unit coupled to the stem head.
3. The method of claim 2,
The fixing portion is a flow control device for air respirator, characterized in that it comprises a spirally bent fixing portion wire.
4. The method of claim 3,
The fixing part is a flow control device for air respirator, characterized in that it includes an engaging groove concentrically disposed with the orifice so that the head projection provided on the stem head can be engaged.
delete The method of claim 1,
A fence portion for partitioning a buffer chamber connecting the housing chamber and the orifice is provided inside the housing,
The stem body is a flow control device for an air respirator, characterized in that extending to the housing chamber through the opening of the fence portion provided in the orifice, the buffer chamber and the fence portion.
The method of claim 1,
The movable unit is
and a pusher rotatably coupled to the housing to rotate according to the movement of the diaphragm to press the stem body.
The method of claim 1,
The diaphragm is provided with an exhaust port for exhausting the air of the housing chamber to the outside of the housing chamber,
An elastic pad disposed on the outside of the housing chamber to cover the exhaust port, elastically deformed according to an increase in pressure in the housing chamber due to the user's exhalation, and configured to open the exhaust port; flow control device.
The method of claim 1,
and a manipulation unit provided in the housing to press the stem body through the diaphragm by moving by a user's manipulation.

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