A pressure reducing switching valve and a ventilator

Abstract

The present invention belongs to the technical field of medical devices, and in particular, relates to a pressure reducing switching valve and a ventilator. The pressure reducing switching valve includes a pressure reducing assembly, a sliding rod, a toggle assembly, and a valve seat; the valve seat is provided with a pressure reducing hole, a first connecting hole, and a switching hole, and the pressure reducing hole is connected to the pressure reducing hole through the first connecting hole; the valve seat is also provided with an air inlet connected to the pressure reducing hole, and a first air outlet and a second air outlet both connected to the switching hole; the pressure reducing assembly is installed in the pressure reducing hole; the sliding rod is slidably installed in the switching hole, and the toggle assembly is connected to the sliding rod and is used to drive the sliding rod to slide in the switching hole; the sliding rod is provided with a first convex portion and a second convex portion spaced apart, the first convex portion is used to control the on and off of the first air outlet, and the second convex portion is used to control the on and off of the second air outlet. In the present invention, the pressure reducing switching valve integrates the functions of a pressure reducing valve and a switching valve, reduces the manufacturing cost of the ventilator, and facilitates the disassembly and assembly of the ventilator.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a pressure reducing switching valve and a ventilator. Background Art

[0002] A ventilator is a medical device that replaces, controls, or alters a person's normal physiological breathing, increasing lung ventilation, improving respiratory function, reducing the work of breathing, and conserving cardiac reserve capacity. The ventilator has both manual and automatic modes. When in manual mode, it delivers pure oxygen, which can be used for patients suffering from carbon monoxide poisoning. In automatic mode, it delivers an air-oxygen mixture, which can provide normal oxygen supply to patients.

[0003] In order to ensure that the ventilator is integrated with an automatic output pipe plug for outputting air-oxygen mixed gas and a manual output pipe for outputting pure oxygen, a switching valve must also be set on the ventilator to realize switching between the automatic output pipe and the manual output pipe.

[0004] The pure oxygen output by the high-pressure oxygen cylinder connected to the ventilator is high-pressure oxygen. In order to ensure that the gas pressure of the ventilator output gas is within an appropriate range, a pressure reducing valve needs to be installed at the front end of the ventilator. The high-pressure oxygen in the high-pressure oxygen cylinder is reduced in pressure by the pressure reducing valve and then input into the automatic output pipeline or the manual output pipeline.

[0005] In the prior art, the switching valve and the pressure reducing valve are two independent valves. The design of two valves not only increases the manufacturing cost of the ventilator, but also makes it inconvenient to disassemble and assemble the ventilator. Summary of the Invention

[0006] The present invention addresses the technical problem in the prior art that a switching valve and a pressure reducing valve are two independent valves, and provides a pressure reducing switching valve and a ventilator.

[0007] In view of the above technical problems, an embodiment of the present invention provides a pressure-reducing switching valve, comprising a pressure-reducing assembly, a slide rod, a toggle assembly, and a valve seat; the valve seat is provided with a pressure-reducing hole, a first communicating hole, and a switching hole, the pressure-reducing hole being connected to the switching hole via the first communicating hole; the valve seat is further provided with an air inlet connected to the pressure-reducing hole, and a first air outlet and a second air outlet both connected to the switching hole;

[0008] The decompression assembly is installed in the decompression hole, and the gas in the decompression hole is decompressed by the decompression assembly and then input into the switching hole through the first communicating hole;

[0009] The sliding rod is slidably installed in the switching hole, and the toggle assembly is connected to the sliding rod and is used to drive the sliding rod to slide in the switching hole;

[0010] The sliding rod is provided with a first convex portion and a second convex portion distributed at intervals, the first convex portion is used to control the on / off of the first air outlet, and the second convex portion is used to control the on / off of the second air outlet.

[0011] Optionally, a first groove communicating with the switching hole is further provided on the valve seat, and an end of the first communicating hole away from the pressure reducing hole is connected with the switching hole through the first groove;

[0012] The sliding rod is provided with a toggle groove located between the first protrusion and the second protrusion; the toggle assembly includes a toggle rod and a rotating member inserted in the first groove, one end of the toggle rod is connected to the rotating member, and the other end of the toggle rod is inserted into the toggle groove; the rotating member is used to drive the toggle rod to rotate, so that the toggle rod drives the sliding rod to slide in the switching hole.

[0013] Optionally, the toggle assembly further includes a hand-feel simulation member and a knob mounted on the rotating member, wherein the knob is provided with a first plug-in slot and a second plug-in slot that are spaced apart;

[0014] The hand-feel simulation member includes a first elastic member, a first bullet, and a cylinder mounted on the valve seat, wherein the first elastic member and the first bullet are both mounted in the inner hole of the cylinder, and one end of the first elastic member abuts against the first bullet;

[0015] When the toggle assembly drives the slide rod to slide until the first protrusion blocks the first air outlet, and the second air outlet is connected to the switching hole, the end of the first bullet away from the first elastic member is inserted into the first plug-in slot;

[0016] When the toggle assembly drives the slide bar to slide to the second protrusion to block the second air outlet, and the first air outlet is connected to the switching hole, the end of the first bullet away from the first elastic member is inserted into the second plug-in slot.

[0017] Optionally, a second groove communicating with the first groove is provided at one end of the rotating member away from the knob, a second communicating hole is provided on a side wall of the rotating member, and the second groove is connected to the switching hole through the second communicating hole;

[0018] The toggle assembly further includes a second elastic member installed in the first groove and the second groove, and opposite ends of the second elastic member are respectively in contact with the bottom wall of the first groove and the bottom wall of the second groove.

[0019] Optionally, the switching hole includes a first through hole, a transition hole and a second through hole connected in sequence, the first connecting hole is connected to the transition hole; the first air outlet is connected to the first through hole, and the second air outlet is connected to the second through hole; the first protrusion is slidably installed in the first through hole, and the second protrusion is slidably installed in the second through hole.

[0020] Optionally, the pressure reducing hole includes a third through hole, a fourth through hole, and a fifth through hole coaxially arranged and connected in sequence, and the inner diameter of the fourth through hole is smaller than the inner diameter of the third through hole; an end of the third through hole away from the fourth through hole is connected to the air inlet, and the first connecting hole is connected to the fifth through hole;

[0021] The pressure reducing assembly includes a fourth elastic member and a pressure reducing valve core. The fourth elastic member is installed in the fifth through hole and abuts against the pressure reducing valve core. An adjusting portion is provided at one end of the pressure reducing valve core away from the fourth elastic member. The adjusting portion passes through the fourth through hole and extends into the third through hole. The adjusting portion is used to adjust the opening size of the fourth through hole.

[0022] Optionally, the pressure reducing valve core includes a sliding disc and a blocking rod connected to the sliding disc, the sliding disc is slidably installed in the fifth through hole, and the sliding disc abuts against the inner wall of the fifth through hole; the adjusting part is arranged on the blocking rod, and the adjusting part is a cone.

[0023] Optionally, the pressure reducing switching valve further includes a first sealing ring sleeved on the first convex portion and a second sealing ring sleeved on the second convex portion.

[0024] Optionally, the axis of the pressure reducing hole is perpendicular to the axis of the switching hole.

[0025] Another embodiment of the present invention further provides a ventilator, comprising the above-mentioned pressure reducing switching valve.

[0026] In the present invention, a high-pressure oxygen cylinder is connected to the air inlet, and the high-pressure oxygen cylinder inputs high-pressure oxygen into the pressure-reducing hole. After the pressure is reduced by the pressure-reducing assembly, the high-pressure oxygen is input into the switching hole through the first connecting hole. When the toggle assembly drives the slide bar to slide leftward in the switching hole until the first protrusion moves to the left of the first air outlet and the second protrusion is located to the left of the second air outlet, the switching hole connects to the first air outlet but not the second air outlet, so that the oxygen reduced in pressure in the switching hole can be output through the first air outlet. When the toggle assembly drives the slide bar to slide rightward in the switching hole until the first protrusion moves to the right of the first air outlet and the second protrusion is located to the right of the second air outlet, the switching hole connects to the second air outlet but not the first air outlet, so that the oxygen reduced in pressure in the switching hole can be output through the second air outlet. In the present invention, the pressure-reducing switching valve integrates the functions of a pressure-reducing valve and a switching valve, reducing the manufacturing cost of the ventilator and facilitating the assembly and disassembly of the ventilator. The pressure-reducing switching valve also has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and examples.

[0028] Figure 1 1 is a schematic structural diagram of a pressure reducing switching valve provided by one embodiment of the present invention;

[0029] Figure 2 is a cross-sectional view of a pressure reducing switching valve provided by one embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of a pressure reducing switching valve provided by one embodiment of the present invention from another perspective;

[0031] Figure 4 It is a structural schematic diagram of a slide rod and a toggle assembly of a pressure reducing switching valve provided by one embodiment of the present invention.

[0032] The reference numerals in the specification are as follows:

[0033] 1. Pressure reducing assembly; 11. Fourth elastic member; 12. Pressure reducing valve core; 121. Adjusting part; 2. Sliding rod; 21. First protrusion; 211. First sealing ring; 22. Second protrusion; 221. Second sealing ring; 23. Toggle groove; 3. Toggle assembly; 31. Toggle rod; 32. Rotating member; 321. Second groove; 322. Second connecting hole; 33. Knob; 34. Hand-feel simulation member; 341. First elastic member; 342. First bullet; 343. Cylinder; 35. Second elastic member; 4. Valve seat; 41. Pressure reducing hole; 411. Third through hole; 412. Fourth through hole; 413. Fifth through hole; 42. First connecting hole; 43. Switching hole; 431. First through hole; 432. Transition hole; 433. Second through hole; 44. Air inlet; 45. First air outlet; 46. Second air outlet; 47. First groove. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be understood that the terms "upper", "lower", "left", "right", "front", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0036] like Figures 1 to 3 As shown, a pressure reducing switching valve provided by one embodiment of the present invention includes a pressure reducing assembly 1, a slide rod 2, a toggle assembly 3 and a valve seat 4; a pressure reducing hole 41, a first connecting hole 42 and a switching hole 43 are provided on the valve seat 4, and the pressure reducing hole 41 is connected to the switching hole 43 through the first connecting hole 42; the valve seat 4 is also provided with an air inlet 44 connected to the pressure reducing hole 41 and a first air outlet 45 and a second air outlet 46 both connected to the switching hole 43; preferably, the axis of the pressure reducing hole 41 is perpendicular to the axis of the switching hole 43, and the vertically arranged pressure reducing hole 41 and the switching hole 43 improve the compactness of the pressure reducing switching valve.

[0037] The pressure reducing assembly 1 is installed in the pressure reducing hole 41. The gas in the pressure reducing hole 41 is reduced in pressure by the pressure reducing assembly 1 and then input into the switching hole 43 through the first connecting hole 42. It can be understood that the pressure reducing assembly 1 is a component well known to those skilled in the art, and the pressure reducing assembly 1 will not be described in detail here. It is only necessary that the pressure reducing assembly 1 can serve as a pressure reducing valve.

[0038] The slide rod 2 is slidably installed in the switching hole 43 , and the toggle assembly 3 is connected to the slide rod 2 and is used to drive the slide rod 2 to slide in the switching hole 43 ; it can be understood that the slide rod 2 can slide left and right in the switching hole 43 .

[0039] The slide bar 2 is provided with a first protrusion 21 and a second protrusion 22 spaced apart from each other. The first protrusion 21 is used to control the opening and closing of the first air outlet 45, and the second protrusion 22 is used to control the opening and closing of the second air outlet 46. It is understood that both the first protrusion 21 and the second protrusion 22 may be annular protrusions, and the inner diameters of the first protrusion 21 and the second protrusion 22 are less than or equal to the inner diameter of the switching hole 43. When the outer diameters of the first protrusion 21 and the second protrusion 22 are both less than the inner diameter of the switching hole 43, the pressure reducing switching valve further includes a first sealing ring 211 sleeved on the first protrusion 21 and a second sealing ring 221 sleeved on the second protrusion 22, with the outer walls of the first sealing ring 211 and the second sealing ring 221 both abutting against the inner wall of the switching hole 43. It should be noted that the first protrusion 21 is disposed opposite the first air outlet 45, and the second protrusion 22 is disposed opposite the second air outlet 46. To further illustrate, when the first protrusion 21 moves to the left side of the first air outlet 45, the second protrusion 22 is located on the left side of the second air outlet 46. At this time, the switching hole 43 is connected to the first air outlet 45 but not to the second air outlet 46; when the first protrusion 21 moves to the right side of the first air outlet 45, the second protrusion 22 is located on the right side of the second air outlet 46. At this time, the switching hole 43 is connected to the second air outlet 46 but not to the first air outlet 45.

[0040] Specifically, a high-pressure oxygen cylinder is connected to the air inlet 44, and the high-pressure oxygen cylinder inputs high-pressure oxygen into the pressure reducing hole 41. After the pressure is reduced by the pressure reducing assembly 1, the high-pressure oxygen is input into the switching hole 43 through the first connecting hole 42. When the toggle assembly 3 drives the slide bar 2 to slide leftward in the switching hole 43 until the first protrusion 21 moves to the left of the first air outlet 45 and the second protrusion 22 is located to the left of the second air outlet 46, the switching hole 43 connects to the first air outlet 45 but not to the second air outlet 46, so that the reduced-pressure oxygen in the switching hole 43 can be output through the first air outlet 45. When the toggle assembly 3 drives the slide bar 2 to slide rightward in the switching hole 43 until the first protrusion 21 moves to the right of the first air outlet 45 and the second protrusion 22 is located to the right of the second air outlet 46, the switching hole 43 connects to the second air outlet 46 but not to the first air outlet 45, so that the reduced-pressure oxygen in the switching hole 43 can be output through the second air outlet 46. In the present invention, the pressure reducing switching valve integrates the functions of a pressure reducing valve and a switching valve, thereby reducing the manufacturing cost of the ventilator and facilitating the disassembly and assembly of the ventilator; and the pressure reducing switching valve has a simple structure and is easy to operate.

[0041] To further illustrate, the first air outlet 45 and the second air outlet 46 are respectively connected to the automatic air supply pipeline and the manual air supply pipeline of the ventilator, so that the pressure reduction switching valve can realize the switching of the ventilator between the automatic air supply pipeline and the manual air supply pipeline.

[0042] In one embodiment, if Figures 2 to 4 As shown, the valve seat 4 is further provided with a first groove 47 communicating with the switching hole 43 , and one end of the first communicating hole 42 away from the pressure reducing hole 41 is connected to the switching hole 43 through the first groove 47 ;

[0043] The slide bar 2 is provided with a toggle groove 23 located between the first protrusion 21 and the second protrusion 22. The toggle assembly 3 includes a toggle rod 31 and a rotating member 32 inserted into the first groove 47. One end of the toggle rod 31 is connected to the rotating member 32, and the other end of the toggle rod 31 is inserted into the toggle groove 23. The rotating member 32 is used to drive the toggle rod 31 to rotate, so that the toggle rod 31 drives the slide bar 2 to slide in the switching hole 43. It is understood that one end of the rotating member 32 is inserted into the first groove 47, and the other end of the rotating member 32 is located outside the first groove 47. The rotating member 32 also serves to seal the first groove 47, preventing gas in the first groove 47 from leaking into the external environment.

[0044] Specifically, when a user rotates the rotating member 32, the rotating member 32 drives the lever 31 to swing left and right, thereby driving the lever 31 to slide left or right in the switching hole 43, thereby achieving the switching function between the switching hole 43 and the first air outlet 45 and the second air outlet 46. In this embodiment, the toggle assembly 3 has a simple structure and is easy to operate, thereby improving the user experience of the pressure reducing switching valve.

[0045] In one embodiment, if Figure 1 and Figure 2 As shown, the toggle assembly 3 also includes a hand-feel simulation part 34 and a knob 33 installed on the rotating part 32, and the knob 33 is provided with a first plug-in slot (not shown in the figure) and a second plug-in slot (not shown in the figure) distributed at intervals; it can be understood that the knob 33 is located outside the rotating part 32.

[0046] The hand-feel simulation part 34 includes a first elastic part 341, a first bullet 342 and a cylinder 343 installed on the valve seat 4. The first elastic part 341 and the first bullet 342 are both installed in the inner hole of the cylinder 343, and one end of the first elastic part 341 is in contact with the first bullet 342; it can be understood that the first bullet 342 includes but is not limited to marbles, cylinders, etc., and the first elastic part 341 includes but is not limited to springs, etc.; a part of the first bullet 342 is located in the inner hole of the cylinder 343, and the other part of the first bullet 342 is located outside the cylinder 343.

[0047] When the toggle assembly 3 drives the slide rod 2 to slide until the first protrusion 21 blocks the first air outlet 45 and the second air outlet 46 is connected to the switching hole 43, the end of the first bullet 342 away from the first elastic member 341 is inserted into the first insertion slot;

[0048] When the toggle assembly 3 drives the slide rod 2 to slide until the second protrusion 22 blocks the second air outlet 46 and the first air outlet 45 is connected to the switching hole 43, the end of the first bullet 342 away from the first elastic member 341 is inserted into the second plug-in slot.

[0049] Specifically, when the knob 33 is rotated to the left, the knob 33 drives the lever 31 to swing leftward via the rotating member 32, and the lever 31 drives the slide bar 2 to slide leftward, thereby connecting the switching hole 43 to the first air outlet 45 but not the second air outlet 46. When the knob 33 is rotated to the right, the knob 33 drives the lever 31 to swing rightward via the rotating member 32, and the lever 31 drives the slide bar 2 to slide rightward, thereby connecting the switching hole 43 to the second air outlet 46 but not the first air outlet 45. When the knob 33 is rotated to the left, the first bullet 342 passes over the second insertion slot and inserts into the first insertion slot; when the knob 33 is rotated to the right, the first bullet 342 passes over the first insertion slot and inserts into the second insertion slot. This ensures that the knob 33 is rotated into place while improving the user's experience of turning the knob 22.

[0050] In one embodiment, if Figure 2 As shown, the end of the rotating member 32 away from the knob 33 is provided with a second groove 321 connected to the first groove 47, and a second connecting hole 322 is provided on the side wall of the rotating member 32, and the second groove 321 is connected to the switching hole 43 through the second connecting hole 322; it can be understood that the opening directions of the first groove 47 and the second groove 321 are opposite, and the switching hole 43 is connected to the switching hole 43 through the first connecting hole 42, the first groove 47, the second groove 321 and the second connecting hole 322 in sequence.

[0051] The toggle assembly 3 further includes a second elastic member 35 installed in the first groove 47 and the second groove 321. Opposite ends of the second elastic member 35 respectively abut against the bottom wall of the first groove 47 and the bottom wall of the second groove 321. It is understood that the second elastic member 35 includes, but is not limited to, a spring, etc. The second elastic member 35 can provide an upward elastic force to the rotating member 32, thereby ensuring the stability of the rotation of the rotating member 32 in the first groove 47.

[0052] In one embodiment, if Figure 3 and Figure 4As shown, the switching hole 43 includes a first through hole 431, a transition hole 432 and a second through hole 433 which are connected in sequence, the first connecting hole 42 is connected to the transition hole 432; the first air outlet 45 is connected to the first through hole 431, and the second air outlet 46 is connected to the second through hole 433; the first protrusion 21 is slidably installed in the first through hole 431, and the second protrusion 22 is slidably installed in the second through hole 433; it can be understood that the first through hole 431 and the second through hole 433 are respectively located on the left and right sides of the transition hole 432, and the first through hole 431 and the second through hole 433 are both round holes, and the transition hole 432 includes but is not limited to square holes, round holes, etc., and the end of the shift rod 31 away from the rotating member 32 extends into the transition hole 432 and is then inserted into the shift slot 23 of the sliding rod 2.

[0053] Specifically, the toggle assembly 3 drives the sliding rod 2 to slide to the left until the first protrusion 21 slides in the first through hole 431 to the side of the first air outlet 45 away from the transition hole 432, and the second protrusion 22 slides in the second through hole 433 to the side of the second air outlet 46 close to the transition hole 432. At this time, the transition hole 432 is connected to the first air outlet 45 through the first through hole 431, and the second protrusion 22 blocks the second through hole 433, so that the transition hole 432 is connected to the first air outlet 45 but not to the second air outlet 46. The toggle assembly 3 drives the slide bar 2 to slide rightward until the first protrusion 21 slides within the first through hole 431 to the side of the first air outlet 45 close to the transition hole 432, and the second protrusion 22 slides within the second through hole 433 to the side of the second air outlet 46 away from the transition hole 432. At this time, the transition hole 432 is connected to the second air outlet 46 through the second through hole 433, and the first protrusion 21 blocks the first through hole 431, so that the transition hole 432 is connected to the second air outlet 46 but not to the first air outlet 45. In this embodiment, the pressure reducing switching valve has a simple structure and low manufacturing cost.

[0054] As a preference, Figure 3 and Figure 4 As shown, the pressure reducing switching valve also includes a third elastic member that is sleeved on the slide rod 2 and located in the transition hole 432; when the slide rod 2 slides left and right in the switching hole 43, the slide rod 2 will compress the third elastic member, thereby ensuring the sliding stability of the slide rod 2.

[0055] In one embodiment, if Figure 2As shown, the pressure reducing hole 41 includes a third through hole 411, a fourth through hole 412 and a fifth through hole 413 which are coaxially arranged and connected in sequence, and the inner diameter of the fourth through hole 412 is smaller than the inner diameter of the third through hole 411; the end of the third through hole 411 away from the fourth through hole 412 is connected to the air inlet 44, and the first connecting hole 42 is connected to the fifth through hole 413; preferably, the inner diameter of the fourth through hole 412 is also smaller than the inner diameter of the fifth through hole 413.

[0056] The pressure-reducing assembly 1 includes a fourth elastic member 11 and a pressure-reducing valve core 12. The fourth elastic member 11 is installed in the fifth through hole 413 and abuts the pressure-reducing valve core 12. An adjustment portion 121 is provided at the end of the pressure-reducing valve core 12 away from the fourth elastic member 11. The adjustment portion 121 passes through the fourth through hole 412 and then extends into the third through hole 411. The adjustment portion 121 is used to adjust the opening size of the fourth through hole 412. Specifically, gas in the third through hole 411 is input into the fifth through hole 413 through the fourth through hole 412. The pressure exerted by the gas on the pressure-reducing valve core 12 opposes the rebound force exerted by the fourth elastic member 11 on the pressure-reducing valve core 12, thereby reducing the pressure of the gas in the pressure-reducing hole 41. Furthermore, as the pressure-reducing valve core 12 slides due to the gas, the distance between the adjustment portion 121 and the fourth through hole 412 adjusts the size of the fourth through hole 412. In this embodiment, the pressure-reducing assembly 1 has a simple structure and low manufacturing cost.

[0057] In one embodiment, if Figure 2 As shown, the pressure reducing valve core 12 includes a sliding disc and a blocking rod connected to the sliding disc. The sliding disc is slidably installed in the fifth through hole 413, and the sliding disc abuts against the inner wall of the fifth through hole 413; the adjusting portion 121 is arranged on the blocking rod, and the adjusting portion 121 is a cone. It can be understood that the fourth elastic member 11 abuts against the end of the sliding disc away from the fourth elastic member 11, and the sliding disc can abut against the inner wall of the fifth through hole 413 through a sealing ring sleeved thereon. During the sliding process of the sliding disc in the fifth through hole 413, the sliding disc drives the adjusting portion 121 to slide in the fourth through hole 412 and / or the third through hole 411, so that the opening size of the fourth through hole 412 is adjusted by how much the adjusting portion 121 is inserted into the fourth through hole 412. In this embodiment, the pressure reducing assembly 1 has a simple structure and low manufacturing cost.

[0058] In one embodiment, if Figure 3 and Figure 4As shown, the pressure reducing switching valve further includes a first sealing ring 211 sleeved on the first protrusion 21 and a second sealing ring 221 sleeved on the second protrusion 22. It is understood that the outer wall of the first sealing ring 211 abuts the inner wall of the first through hole 431, and the outer wall of the second sealing ring 221 abuts the inner wall of the second through hole 433, thereby ensuring the sealing of the first through hole 431 by the first sealing ring 211, and the sealing of the second through hole 433 by the second sealing ring 221. Preferably, the first protrusion 21 is provided with a first annular groove, into which the first sealing ring 211 is sleeved; and the second protrusion 22 is provided with a second annular groove, into which the second sealing ring 221 is sleeved, thereby ensuring the stability of the first sealing ring 211 sleeved on the first protrusion 21, and the stability of the second sealing ring 221 sleeved on the second protrusion 22.

[0059] In one embodiment, the pressure-reducing switching valve further includes a first outlet connector plugged into the first outlet 45 and a second outlet connector plugged into the second outlet 46. The design of the first and second outlet connectors improves the convenience of connecting the pressure-reducing switching valve to external piping. Preferably, the centerlines of the first outlet 45 and the second outlet 46 are both perpendicular to the centerline of the switching hole 43.

[0060] Another embodiment of the present invention further provides a ventilator, comprising the above-mentioned pressure reducing switching valve.

[0061] In summary, the air inlet 44 is connected to the high-pressure oxygen cylinder, the first air outlet 45 is connected to the manual output pipeline of the ventilator (outputting pure oxygen), and the second air outlet 46 is connected to the automatic output pipeline of the ventilator (outputting air-oxygen mixed gas); the high-pressure oxygen cylinder inputs high-pressure oxygen into the pressure reducing hole 41, and after being depressurized by the pressure reducing assembly 1, it is input into the switching hole 43 through the first connecting hole 42.

[0062] When the user turns the knob 33 to the left, the knob 33 drives the lever 31 to swing to the left via the rotating member 32, and the lever 31 drives the slide bar 2 to slide to the left until the first protrusion 21 moves to the left of the first air outlet 45. When the second protrusion 22 is located to the left of the second air outlet 46, the switching hole 43 is connected to the first air outlet 45 but not to the second air outlet 46, so that the depressurized oxygen in the switching hole 43 is output to the manual output pipeline through the first air outlet 45.

[0063] The user turns the knob 33 to the right, and the knob 33 drives the lever 31 to swing to the right via the rotating member 32. The lever 31 drives the slide bar 2 to slide to the right until the second protrusion 22 moves to the right of the second air outlet 45. When the first protrusion 21 is located to the right of the first air outlet 45, the switching hole 43 is connected to the second air outlet 46 but not to the first air outlet 45, so that the depressurized oxygen in the switching hole 43 is output to the automatic output pipeline through the second air outlet 46.

[0064] The above are merely embodiments of the pressure reducing switching valve and ventilator of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure reducing switching valve, characterized in that: The valve seat comprises a pressure reducing assembly, a sliding rod, a toggle assembly, and a valve seat; the valve seat is provided with a pressure reducing hole, a first communicating hole, and a switching hole, the pressure reducing hole being connected to the switching hole via the first communicating hole; the valve seat is also provided with an air inlet connected to the pressure reducing hole, and a first air outlet and a second air outlet both connected to the switching hole; The decompression assembly is installed in the decompression hole, and the gas in the decompression hole is decompressed by the decompression assembly and then input into the switching hole through the first communicating hole; The sliding rod is slidably installed in the switching hole, and the toggle assembly is connected to the sliding rod and is used to drive the sliding rod to slide in the switching hole; The sliding rod is provided with a first convex portion and a second convex portion spaced apart from each other, the first convex portion is used to control the on / off of the first air outlet, and the second convex portion is used to control the on / off of the second air outlet; The valve seat is further provided with a first groove communicating with the switching hole, and an end of the first communicating hole away from the pressure reducing hole is connected with the switching hole through the first groove; The slide rod is provided with a toggle groove located between the first protrusion and the second protrusion; the toggle assembly includes a toggle rod and a rotating member inserted into the first groove, one end of the toggle rod is connected to the rotating member, and the other end of the toggle rod is inserted into the toggle groove; the rotating member is used to drive the toggle rod to rotate, so that the toggle rod drives the slide rod to slide in the switching hole; The toggle assembly further includes a hand-feel simulation member and a knob mounted on the rotating member, wherein the knob is provided with a first plug-in slot and a second plug-in slot that are spaced apart.

2. The pressure reducing switching valve according to claim 1, characterized in that: The hand-feel simulation member includes a first elastic member, a first bullet, and a cylinder mounted on the valve seat, wherein the first elastic member and the first bullet are both mounted in the inner hole of the cylinder, and one end of the first elastic member abuts against the first bullet; When the toggle assembly drives the slide rod to slide until the first protrusion blocks the first air outlet, and the second air outlet is connected to the switching hole, the end of the first bullet away from the first elastic member is inserted into the first plug-in slot; When the toggle assembly drives the slide bar to slide to the second protrusion to block the second air outlet, and the first air outlet is connected to the switching hole, the end of the first bullet away from the first elastic member is inserted into the second plug-in slot.

3. The pressure reducing switching valve according to claim 2, characterized in that: A second groove communicating with the first groove is provided at one end of the rotating member away from the knob, and a second communicating hole is provided on the side wall of the rotating member, and the second groove is connected to the switching hole through the second communicating hole; The toggle assembly further includes a second elastic member installed in the first groove and the second groove, and opposite ends of the second elastic member are respectively in contact with the bottom wall of the first groove and the bottom wall of the second groove.

4. The pressure reducing switching valve according to claim 1, characterized in that: The switching hole includes a first through hole, a transition hole and a second through hole that are connected in sequence, the first connecting hole is connected to the transition hole; the first air outlet is connected to the first through hole, and the second air outlet is connected to the second through hole; the first protrusion is slidably installed in the first through hole, and the second protrusion is slidably installed in the second through hole.

5. The pressure reducing switching valve according to claim 1, characterized in that: The pressure reducing hole includes a third through hole, a fourth through hole, and a fifth through hole coaxially arranged and connected in sequence, and the inner diameter of the fourth through hole is smaller than the inner diameter of the third through hole; the end of the third through hole away from the fourth through hole is connected to the air inlet, and the first connecting hole is connected to the fifth through hole; The pressure reducing assembly includes a fourth elastic member and a pressure reducing valve core. The fourth elastic member is installed in the fifth through hole and abuts against the pressure reducing valve core. An adjusting portion is provided at one end of the pressure reducing valve core away from the fourth elastic member. The adjusting portion passes through the fourth through hole and extends into the third through hole. The adjusting portion is used to adjust the opening size of the fourth through hole.

6. The pressure reducing switching valve according to claim 5, characterized in that: The pressure reducing valve core includes a sliding disk and a blocking rod connected to the sliding disk. The sliding disk is slidably installed in the fifth through hole, and the sliding disk abuts against the inner wall of the fifth through hole. The adjusting part is arranged on the blocking rod, and the adjusting part is a cone.

7. The pressure reducing switching valve according to claim 1, characterized in that: The pressure reducing switching valve further includes a first sealing ring sleeved on the first convex portion and a second sealing ring sleeved on the second convex portion.

8. The pressure reducing switching valve according to claim 1, wherein: The axis of the pressure reducing hole is perpendicular to the axis of the switching hole.

9. A ventilator, characterized in that: It comprises the pressure reducing switching valve according to any one of claims 1 to 8.

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