Linkage negative pressure switch switching valve and anesthesia machine

Abstract

The application is suitable for the field of medical equipment, and provides a linkage negative pressure switch switching valve and an anesthesia machine. The linkage negative pressure switch switching valve comprises a knob assembly, the knob assembly comprising a rotating shaft core and an operation knob arranged at one end of the rotating shaft core; a negative pressure switching valve, the negative pressure switching valve comprising a switching valve seat and a switching valve core arranged at one side of the switching valve seat, the other end of the rotating shaft core penetrating the switching valve seat and the switching valve core, and the switching valve core being capable of rotating relative to the switching valve seat with the rotation of the rotating shaft core; and an oxygen switch valve, the oxygen switch valve comprising a switch valve seat arranged at the other side of the switching valve seat and a switch valve core arranged in the switch valve seat, the switch valve core being in transmission connection with the other end of the rotating shaft core and being capable of moving in the switch valve seat with the rotation of the rotating shaft core. The linkage control of the oxygen switch valve and the negative pressure switching valve by the rotating shaft core can linkage control the negative pressure output and the oxygen on-off, the operation is more convenient, and the operation efficiency of the negative pressure generator is improved.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, and particularly relates to a linkage negative pressure switch valve and an anesthesia machine. Background Technology

[0002] A negative pressure generator is a component that generates negative pressure, which can be used for suctioning sputum, removing blood clots, etc., and is an important function of anesthesia machines. In the medical device industry, a negative pressure generator is generally controlled by three valves: a switching valve that controls the negative pressure switch, a switching valve that controls the two states of full-power negative pressure output and adjustable output, and a regulating valve that controls the magnitude of the negative pressure.

[0003] However, current negative pressure generators all use a structure in which three valves operate independently. This structure has low overall operating efficiency, making the operation of the negative pressure generator cumbersome and affecting the operation time. Summary of the Invention

[0004] This invention provides a linkage-type negative pressure switch switching valve, which aims to solve the problem that the current negative pressure generator adopts a structure in which three valve bodies operate independently, resulting in low operating efficiency, complicated operation procedures, and reduced surgical time.

[0005] In a first aspect, the present invention provides a linkage-type negative pressure switch switching valve, comprising:

[0006] Knob assembly;

[0007] A negative pressure switching valve includes a switching valve seat and a switching valve core disposed on one side of the switching valve seat. A knob assembly passes through the switching valve seat and the switching valve core. The switching valve core can rotate relative to the switching valve seat as the knob assembly rotates, thereby switching the negative pressure output of the negative pressure switching valve.

[0008] An oxygen switching valve includes a switching valve seat located on the other side of the switching valve seat and a switching valve shaft disposed in the switching valve seat. The switching valve shaft is kinetically connected to the knob assembly and can move in the switching valve seat as the knob assembly rotates, so as to control the oxygen supply and demand of the oxygen switching valve.

[0009] Optionally, the switching valve seat is provided with a negative pressure input port, a full power output port and an adjustable power output port. When the switching valve core rotates relative to the switching valve seat, the negative pressure input port can be connected to or disconnected from one of the full power output port and the adjustable power output port.

[0010] The switch valve seat is provided with an oxygen inlet and an oxygen outlet. The switch valve shaft can move away from or near the knob assembly in the switch valve seat as the knob assembly rotates, so that the oxygen inlet and the oxygen outlet are connected or disconnected.

[0011] Optionally, when the negative pressure input port is disconnected from both the full power output port and the adjustable power output port, the oxygen inlet is disconnected from the oxygen outlet.

[0012] When the negative pressure input port is connected to the full power output port or the adjustable power output port, the oxygen inlet is connected to the oxygen outlet.

[0013] Optionally, the switching valve core can rotate with the knob assembly between a first position, a second position, and a third position relative to the switching valve seat, thereby disconnecting the negative pressure input port from both the full power output port and the adjustable power output port, connecting the negative pressure input port to the adjustable power output port, or connecting the negative pressure input port to the full power output port.

[0014] Optionally, the switching valve seat is further provided with a negative pressure output port, a full power input port and an adjustable power input port respectively connected to the negative pressure input port, the full power output port and the adjustable power output port on the side facing the switching valve seat, and a first connecting groove and a second connecting groove spaced apart from the first connecting groove on the side facing the switching valve seat.

[0015] The first connecting groove can connect the negative pressure output port and the adjustable power input port as the switching valve core rotates, so that the negative pressure input port and the adjustable power output port are connected. The second connecting groove can connect the negative pressure output port and the full power input port as the switching valve core rotates, so that the negative pressure input port and the full power output port are connected.

[0016] Optionally, when the switching valve core is in the first position, neither the first connecting groove nor the second connecting groove coincides with the negative pressure output port, the negative pressure output port is disconnected from both the full power input port and the adjustable power input port, and the negative pressure input port is disconnected from both the full power output port and the adjustable power output port.

[0017] When the switching valve core is in the second position, the first connecting groove at least partially overlaps with the negative pressure output port and the adjustable power input port, the negative pressure output port is connected to the adjustable power input port, and the negative pressure input port is connected to the adjustable power output port.

[0018] When the switching valve core is in the third position, the second connecting groove at least partially overlaps with the negative pressure output port and the full power input port, the negative pressure output port is connected to the full power input port, and the negative pressure input port is connected to the full power output port.

[0019] Optionally, the oxygen switching valve further includes:

[0020] A linkage valve core, wherein the linkage valve core is located at one end of the knob assembly that is drively connected to the switch valve core and is situated within the switch valve seat, and the linkage valve core can rotate synchronously with the knob assembly; and

[0021] A linkage slider is provided on the side of the linkage valve core away from the knob assembly and located in the switch valve seat. The linkage valve core is rotatably embedded in the linkage slider. One end of the switch valve shaft is connected to the linkage slider. When the linkage valve core rotates, it can push the linkage slider to slide, thereby pushing the switch valve shaft to move.

[0022] Optionally, the linkage valve core includes a valve core body and push rods disposed on both sides of the valve core body, and the linkage slider includes a slider body and an embedding groove disposed in the slider body. The slider body has a recessed portion and a protrusion connected to the recessed portion on the side facing the linkage valve core. The valve core body is rotatably embedded in the embedding groove so as to drive the push rod to rotate between the recessed portion and the protrusion, thereby causing the slider body to slide and the switching valve shaft to move.

[0023] Optionally, when the push rod rotates from the recess to the protrusion, the linkage slider is pushed to slide away from the linkage valve core, the switch valve shaft is pushed to move by the linkage slider, and the oxygen inlet is connected to the oxygen outlet;

[0024] When the push rod rotates from the protrusion to the recess, the switch valve shaft resets and pushes the linkage slider to move closer to the linkage valve core, thus disconnecting the oxygen inlet from the oxygen outlet.

[0025] Optionally, the switching valve shaft includes:

[0026] A movable rod, one end of which is connected to the linkage slider, and the other end of which is elastically connected to the switch valve seat;

[0027] The first sealing part is located at the other end of the moving rod;

[0028] A second sealing portion is disposed between the first sealing portion and the linkage slider; and

[0029] An elastic element is disposed between the first sealing portion and the switch valve seat, and applies a thrust to the first sealing portion in the direction of the linkage slider.

[0030] Optionally, the switch valve seat is provided with a moving channel and an air inlet chamber connected to the moving channel. The oxygen outlet is connected to the moving channel, the oxygen inlet is connected to the air inlet chamber, and the switch valve shaft can move in the moving channel and the air inlet chamber.

[0031] When the switching valve shaft moves close to the linkage slider, the second sealing part seals the moving channel and the air inlet chamber, the moving channel is disconnected from the air inlet chamber, and the oxygen inlet is disconnected from the oxygen outlet;

[0032] When the switching valve shaft moves away from the linkage slider, the second sealing part opens the moving channel and the air inlet chamber, the moving channel is connected to the air inlet chamber, and the oxygen inlet is connected to the oxygen outlet.

[0033] Optionally, the knob assembly, the switching valve core, the switch valve shaft, the linkage valve core, and the linkage slider are coaxially arranged.

[0034] Optionally, there are two recesses and two protrusions, with the two recesses and the two protrusions arranged opposite each other.

[0035] Optionally, the recessed portion has inclined surfaces on both sides, and the protruding portion has a plane connected to the inclined surfaces.

[0036] Optionally, the negative pressure switching valve further includes a sealing gasket disposed between the switching valve core and the switching valve seat, and the sealing gasket has through holes corresponding to the negative pressure output port, the full power input port and the adjustable power input port respectively.

[0037] Optionally, the switch valve seat includes:

[0038] A valve seat body, wherein the switching valve shaft is movably disposed within the valve seat body; and

[0039] A base plate is provided on the side of the valve seat body away from the linkage slider. A limiting groove is provided on the base plate. The elastic element elastically abuts against the limiting groove and the first sealing part. A sealing ring is also provided between the base plate and the valve seat body.

[0040] Optionally, the knob assembly includes:

[0041] A rotating shaft, one end of which passes through the switching valve seat and the switching valve core, and is drively connected to the switching valve shaft; and

[0042] An operating knob is located on the end of the rotating shaft away from the switching valve seat.

[0043] Secondly, embodiments of the present invention also provide an anesthesia machine, comprising:

[0044] Body; and

[0045] According to any embodiment of the linkage negative pressure switch switching valve, the linkage negative pressure switch switching valve is disposed in the machine body.

[0046] The beneficial effects achieved by this invention are as follows: The linked negative pressure switching valve provided by this invention includes a knob assembly, a negative pressure switching valve, and an oxygen switching valve. The switching valve core rotates relative to the switching valve seat in the negative pressure switching valve as the knob assembly rotates, thereby switching the negative pressure output of the negative pressure switching valve. Simultaneously, the switching valve shaft in the oxygen switching valve is drivenly connected to the knob assembly and can move within the switching valve seat as the knob assembly rotates, thereby controlling the oxygen supply and demand of the oxygen switching valve. Therefore, by linking the oxygen switching valve and the negative pressure switching valve with the knob assembly, both negative pressure output and oxygen supply and demand can be controlled simultaneously. This simplifies operation, reduces negative pressure response time, improves the operating efficiency of the negative pressure generator, and minimizes the impact on surgical time. Attached Figure Description

[0047] Figure 1 This is an exploded structural diagram of a linkage negative pressure switch switching valve provided by the present invention;

[0048] Figure 2 This is a schematic diagram of the overall structure of a linkage-type negative pressure switch switching valve provided by the present invention;

[0049] Figure 3 This is a cross-sectional view of the switching valve core provided by the present invention;

[0050] Figure 4 This is a cross-sectional view of the switching valve seat provided by the present invention;

[0051] Figure 5 This is a cross-sectional view of a linkage-type negative pressure switch switching valve provided by the present invention;

[0052] Figure 6 This is a schematic diagram of the linkage slider provided by the present invention;

[0053] Figure 7 This is a cross-sectional view of another type of linkage negative pressure switch switching valve provided by the present invention;

[0054] In the diagram, 1. Knob assembly, 11. Rotating shaft, 12. Operating knob, 13. Limit nut, 2. Negative pressure switching valve, 21. Switching valve seat, 211. Negative pressure input port, 212. Full power output port, 213. Adjustable power output port, 214. Negative pressure output port, 215. Full power input port, 216. Adjustable power input port, 22. Switching valve core, 221. First connecting groove, 222. Second connecting groove, 23. Valve cover, 24. Sealing gasket, 3. Oxygen switch valve, 31. Switching valve seat, 311. Oxygen inlet. 312. Oxygen outlet; 313. Moving channel; 314. Inlet chamber; 315. Valve seat body; 316. Base plate; 317. Limiting groove; 318. Sealing ring; 319. Sealing groove; 32. Switch valve shaft; 321. Moving rod; 322. First sealing part; 323. Second sealing part; 324. Elastic element; 33. Linkage valve core; 331. Valve core body; 332. Push rod; 34. Linkage slider; 341. Slider body; 3411. Recess; 3412. Protrusion; 342. Embedded groove. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0056] In this invention, the oxygen switch valve and the negative pressure switching valve are linked and controlled by a knob assembly, which can simultaneously control the negative pressure output and oxygen on / off. This makes the operation simpler, reduces the negative pressure response time, improves the operating efficiency of the negative pressure generator, and reduces the impact on the operation time.

[0057] Example 1

[0058] Combination Figure 1 and Figure 2 As shown, the present invention provides a linkage-type negative pressure switch switching valve, comprising:

[0059] Knob assembly 1, which includes a rotating shaft 11 and an operating knob 12 located at one end of the rotating shaft 11;

[0060] The negative pressure switching valve 2 includes a switching valve seat 21 and a switching valve core 22 disposed on one side of the switching valve seat 21. The other end of the rotating shaft 11 passes through the switching valve seat 21 and the switching valve core 22. The switching valve core 22 can rotate relative to the switching valve seat 21 as the rotating shaft 11 rotates, thereby switching the negative pressure output of the negative pressure switching valve 2.

[0061] The oxygen switching valve 3 includes a switching valve seat 31 located on the other side of the switching valve seat 21 and a switching valve core 32 disposed in the switching valve seat 31. The switching valve core 32 is connected to the other end of the rotating shaft 11 and can move in the switching valve seat 31 as the rotating shaft 11 rotates, so as to control the oxygen supply and demand of the oxygen switching valve 3.

[0062] Specifically, the aforementioned knob assembly 1 can be used to adjust the rotation direction and angle, driving the oxygen switch valve 3 and the negative pressure switching valve 2 to achieve linked control. The operating knob 12 in the knob assembly 1 is located at one end of the rotating shaft 11, and can be operated to rotate counterclockwise or clockwise, with a rotation angle of up to 60°. When the operating knob 12 is rotated, the rotating shaft 11 can rotate synchronously with the operation knob 12. The knob assembly 1 may also include a limiting nut 13, which is located at one end of the operating knob 12 and fitted onto the rotating shaft 11 for limiting its position.

[0063] More specifically, the aforementioned negative pressure switching valve 2 is positioned between the knob assembly 1 and the oxygen switch valve 3 to control the negative pressure output. The aforementioned rotating shaft 11 passes through the switching valve seat 21 in the negative pressure switching valve 2, and through the switching valve core 22 positioned on the side of the switching valve seat 21 near the knob assembly 1. With the rotation of the rotating shaft 11, the switching valve core 22 can synchronously rotate relative to the switching valve seat 21. This rotation of the switching valve core 22 relative to the switching valve seat 21 controls the connectivity of each inlet and outlet on the switching valve seat 21, thereby controlling the negative pressure output of the negative pressure switching valve 2. The negative pressure switching valve 2 may also include a valve cover 23, which is positioned on the side of the switching valve seat 21 near the switching valve core 22. After assembly, the valve cover 23 is combined with the switching valve seat 21 to protect the switching valve core 22.

[0064] More specifically, the aforementioned oxygen switch valve 3 is used to control oxygen input and output. The switch valve seat 31 of the oxygen switch valve 3 is located at the other end of the switching valve seat 21. A switch valve shaft 32 is also provided in the switch valve seat 31, and the switch valve shaft 32 is connected to the other end of the rotating shaft 11. Therefore, the rotation of the rotating shaft 11 synchronously drives the switch valve shaft 32 to move relative to the switch valve seat 31. When the switch valve shaft 32 moves relative to the switch valve seat 31, it can control the connection of the oxygen inlet and outlet on the switch valve seat 31, thereby controlling the oxygen supply and demand of the oxygen switch valve 3. A schematic diagram of the overall structure of the assembled linkage negative pressure switch valve is shown below. Figure 2 As shown.

[0065] The linkage negative pressure switch valve in this embodiment of the invention includes a knob assembly 1, a negative pressure switch valve 2, and an oxygen switch valve 3. The switching valve core 22 in the negative pressure switch valve 2 can rotate relative to the switching valve seat 21 in the negative pressure switch valve 2 as the rotating shaft core 11 in the knob assembly 1 rotates, so as to switch the negative pressure output of the negative pressure switch valve 2. At the same time, the switching valve core 32 in the oxygen switch valve 3 is connected to the other end of the rotating shaft core 11 and can move in the switching valve seat 31 as the rotating shaft core 11 rotates, so as to control the oxygen on / off of the oxygen switch valve 3. Thus, based on the rotation of the rotating shaft core 11, the oxygen switch valve 3 and the negative pressure switch valve 2 are synchronously linked and controlled, which can simultaneously control the negative pressure output and the oxygen on / off. The operation is simpler, the negative pressure response time can be reduced, the operating efficiency of the negative pressure generator can be improved, and the impact on the operation time can be reduced.

[0066] Example 2

[0067] Combination Figure 1 As shown, the switching valve seat 21 provided in this embodiment is provided with a negative pressure input port 211, a full power output port 212 and an adjustable power output port 213. When the switching valve core 22 rotates relative to the switching valve seat 21, it can make the negative pressure input port 211 connected to one of the full power output port 212 and the adjustable power output port 213 or disconnect them.

[0068] The switch valve seat 31 is provided with an oxygen inlet 311 and an oxygen outlet 312. The switch valve core 32 can move away from or near the rotating core 11 in the switch valve seat 31 as the rotating core 11 rotates, so that the oxygen inlet 311 and the oxygen outlet 312 are connected or disconnected.

[0069] Specifically, the negative pressure input port 211 is used to input negative pressure, the full power output port 212 is used to output negative pressure at full power, and the adjustable power output port 213 is used to output negative pressure with adjustable power.

[0070] The main body of the aforementioned switching valve seat 21 can be a cuboid structure. The negative pressure input port 211, the full power output port 212, and the adjustable power output port 213 can be distributed on three different sides of the main body of the switching valve seat 21, and are detachably connected to the main body of the switching valve seat 21.

[0071] When the control rotating shaft 11 rotates, causing the switching valve core 22 to rotate relative to the switching valve seat 21, it can control the connection or disconnection of one of the negative pressure input port 211 with the full power output port 212 and the adjustable power output port 213. For example, in the default state (reset state), the negative pressure input port 211 is disconnected from both the full power output port 212 and the adjustable power output port 213, and there is no negative pressure output. When the operating knob 12 is rotated 60° counterclockwise, the negative pressure input port 211 is connected to the full power output port 212, and the negative pressure is input from the negative pressure input port 211 and output from the full power output port 212. When the operating knob 12 is rotated 60° clockwise, the negative pressure input port 211 is connected to the adjustable power output port 213, and the negative pressure is input from the negative pressure input port 211 and output from the adjustable power output port 213.

[0072] More specifically, the oxygen inlet 311 is used to input oxygen, and the oxygen outlet 312 is used to output oxygen. The oxygen inlet 311 and oxygen outlet 312 are detachably mounted on different sides of the switch valve seat 31. When the control rotating shaft 11 rotates, the switch valve shaft 32, located in the switch valve seat 31, moves away from or closer to the rotating shaft 11 within the switch valve seat 31 as the rotating shaft 11 rotates, thereby controlling the connection or disconnection of the oxygen inlet 311 and oxygen outlet 312, for example:

[0073] Rotating the control knob 12 60° clockwise or counterclockwise causes the valve core 32 to move closer to the rotating core 11 within the valve seat 31, connecting the oxygen inlet 311 and the oxygen outlet 312, resulting in oxygen output. In the default state, the valve seat 31 moves away from the rotating core 11, disconnecting the oxygen inlet 311 from the oxygen outlet 312, and there is no oxygen output. When oxygen is output, the negative pressure generator starts operating.

[0074] In this embodiment, by setting a negative pressure input port 211, a full power output port 212, and an adjustable power output port 213 on the switching valve seat 21, when the rotating shaft 11 is controlled to rotate, the switching valve core 22 can be controlled to rotate synchronously, thereby connecting or disconnecting the negative pressure input port 211 from one of the full power output port 212 and the adjustable power output port 213, thus realizing negative pressure input and output control.

[0075] Furthermore, an oxygen inlet 311 and an oxygen outlet 312 are provided on the switch valve seat 31. Based on the transmission connection between the switch valve shaft 32 and the rotating shaft 11, when the rotating shaft 11 rotates, in addition to driving the negative pressure switching valve 2 to work, it can also synchronously drive the switch valve shaft 32 to move away from or closer to the rotating shaft 11 on the switch valve seat 31, thereby controlling the oxygen inlet 311 and the oxygen outlet 312 to connect or disconnect, realizing the input and output control of oxygen. Finally, based on the rotation of the rotating shaft 11, the oxygen switch valve 3 and the negative pressure switching valve 2 are synchronously linked and controlled, which can simultaneously control the negative pressure output and the oxygen on / off, making the operation simpler, reducing the negative pressure response time, and improving the operating efficiency of the negative pressure generator.

[0076] Example 3

[0077] When the negative pressure input port 211, the full power output port 212, and the adjustable power output port 213 provided in this embodiment are all disconnected, the oxygen inlet 311 and the oxygen outlet 312 are disconnected.

[0078] When the negative pressure input port 211 is connected to the full power output port 212 or the adjustable power output port 213, the oxygen inlet 311 is connected to the oxygen outlet 312.

[0079] When the negative pressure input port 211 is disconnected from the full power output port 212 and the adjustable power output port 213, there is no negative pressure output from the full power output port 212 and the adjustable power output port 213, which indicates that the negative pressure generator is not working. At the same time, the oxygen inlet 311 is disconnected from the oxygen outlet 312, so there is no oxygen output at the oxygen outlet 312.

[0080] When the negative pressure input port 211 is connected to the full power output port 212, negative pressure is output from the full power output port 212, indicating that the negative pressure generator is in operation. The oxygen inlet 311 is connected to the oxygen outlet 312, therefore oxygen is output at the oxygen outlet 312. Similarly, when the negative pressure input port 211 is connected to the adjustable power output port 213, negative pressure is output from the adjustable power output port 213. At this time, the negative pressure generator is in operation, and the oxygen inlet 311 is connected to the oxygen outlet 312, therefore oxygen is output at the oxygen outlet 312.

[0081] In this embodiment, by controlling the rotation of the rotating shaft core 11 to drive the switching valve core 22 to rotate synchronously, the on / off state of the negative pressure input port 211, the full power output port 212, and the adjustable power output port 213 is controlled, thereby controlling the negative pressure output.

[0082] Furthermore, by controlling the rotation of the rotating shaft 11, the switching valve shaft 32 is moved closer to or further away from the rotating shaft 11, simultaneously controlling the on / off status of the oxygen inlet 311 and the oxygen outlet 312, thereby controlling the oxygen supply and demand. It is evident that the rotation of the rotating shaft 11 drives the synchronous linkage control of the oxygen switching valve 3 and the negative pressure switching valve 2, enabling simultaneous control of negative pressure output and oxygen supply and demand. This simplifies operation, reduces negative pressure response time, and improves the operating efficiency of the negative pressure generator.

[0083] Example 4

[0084] Combination Figure 3 As shown, the switching valve core 22 provided in this embodiment can rotate with the rotating shaft core 11 between the first position, the second position and the third position relative to the switching valve seat 21, so that the negative pressure input port 211 is disconnected from both the full power output port 212 and the adjustable power output port 213, the negative pressure input port 211 is connected to the adjustable power output port 213 or the negative pressure input port 211 is connected to the full power output port 212.

[0085] Among them, such as Figure 3 As shown, the first position can refer to position C on the switching valve core 22, the second position can refer to position E on the switching valve core 22, and the third position can refer to position D on the switching valve core 22. The switching valve core 22 can rotate between positions C, E and D.

[0086] When the switching valve core 22 rotates to position C, the negative pressure input port 211 is disconnected from both the full power output port 212 and the adjustable power output port 213, resulting in no negative pressure output. When the switching valve core 22 rotates to position E, the slot in position D connects the negative pressure input port 211 with the adjustable power output port 213, and negative pressure is output from the adjustable power output port 213. When the switching valve core 22 rotates to position D, the slot in position E connects the negative pressure input port 211 with the full power output port 212, and negative pressure is output from the full power output port 212.

[0087] In this embodiment, the rotating shaft 11 drives the switching valve core 22 to rotate between the first position, the second position, and the third position, thereby controlling the negative pressure input port 211 to be disconnected from both the full power output port 212 and the adjustable power output port 213, or the negative pressure input port 211 to be connected to the adjustable power output port 213, or the negative pressure input port 211 to be connected to the full power output port 212. Ultimately, the negative pressure is controlled to either not be output or to be output from the adjustable power output port 213 or the full power output port 212.

[0088] Example 5

[0089] Combination Figure 3 , Figure 4As shown, the switching valve seat 21 provided in this embodiment is further provided with a negative pressure output port 214, a full power input port 215 and an adjustable power input port 216 on the side facing the switching valve core 22, which are respectively connected to the negative pressure input port 211, the full power output port 212 and the adjustable power output port 213. The switching valve core 22 is provided with a first connecting groove 221 and a second connecting groove 222 spaced apart from the first connecting groove 221 on the side facing the switching valve seat 21.

[0090] The first connecting groove 221 can connect the negative pressure output port 214 and the adjustable power input port 216 as the switching valve core 22 rotates, so that the negative pressure input port 211 and the adjustable power output port 213 are connected. The second connecting groove 222 can connect the negative pressure output port 214 and the full power input port 215 as the switching valve core 22 rotates, so that the negative pressure input port 211 and the full power output port 212 are connected.

[0091] Specifically, a negative pressure output port 214, a full power input port 215, and an adjustable power input port 216 are provided on the side of the switching valve seat 21 facing the switching valve core 22. The negative pressure output port 214 can refer to the output port corresponding to the slot in the first position, the full power output port 212 can refer to the input port corresponding to the slot in the second position, and the adjustable power input port 216 can refer to the input port corresponding to the slot in the third position. The negative pressure output port 214 is connected to the negative pressure input port 211, the full power output port 212 is connected to the full power input port 215, and the adjustable power output port 213 is connected to the adjustable power input port 216.

[0092] More specifically, a first connecting groove 221 is provided on the side of the switching valve core 22 facing the switching valve seat 21, and a second connecting groove 222 is provided at an interval from the first connecting groove 221, wherein the first connecting groove 221 corresponds to the third position and the second connecting groove 222 corresponds to the second position.

[0093] When the switching valve core 22 rotates to the third position, the first connecting groove 221 can be controlled to connect the negative pressure output port 214 and the adjustable power input port 216, thereby connecting the negative pressure input port 211 and the adjustable power output port 213. At this time, negative pressure is input from the negative pressure input port 211 and output from the adjustable power output port 213.

[0094] Similarly, when the switching valve core 22 rotates to the second position, the second connecting groove 222 can be controlled to connect the negative pressure output port 214 and the full power input port 215, thereby connecting the negative pressure input port 211 and the full power output port 212. At this time, negative pressure is input from the negative pressure input port 211 and output from the full power output port 212.

[0095] In this embodiment, by controlling the switching valve core 22 to rotate between different positions, the first connecting groove 221 is connected to the negative pressure output port 214 and the adjustable power input port 216, or the second connecting groove 222 is connected to the negative pressure output port 214 and the full power input port 215, and finally the negative pressure is controlled to be output from the adjustable power output port 213 or the full power output port 212, so as to control the magnitude of the negative pressure output.

[0096] Example 6

[0097] When the switching valve core 22 provided in this embodiment is in the first position, neither the first connecting groove 221 nor the second connecting groove 222 coincides with the negative pressure output port 214. The negative pressure output port 214 is disconnected from the full power input port 215 and the adjustable power input port 216. The negative pressure input port 211 is disconnected from the full power output port 212 and the adjustable power output port 213.

[0098] When the switching valve core 22 is in the second position, the first connecting groove 221 at least partially overlaps with the negative pressure output port 214 and the adjustable power input port 216. The negative pressure output port 214 is connected to the adjustable power input port 216, and the negative pressure input port 211 is connected to the adjustable power output port 213.

[0099] When the switching valve core 22 is in the third position, the second connecting groove 222 at least partially overlaps with the negative pressure output port 214 and the full power input port 215. The negative pressure output port 214 is connected to the full power input port 215, and the negative pressure input port 211 is connected to the full power output port 212.

[0100] Specifically, when the switching valve core 22 rotates to the first position, neither the first connecting groove 221 nor the second connecting groove 222 coincides with the negative pressure output port 214. This means that the negative pressure output port 214 is disconnected from the full power input port 215 and the adjustable power input port 216, and the negative pressure input port 211 is disconnected from the full power output port 212 and the adjustable power output port 213. At this time, there is no negative pressure output, and the negative pressure generator does not work.

[0101] More specifically, when the switching valve core 22 is in the second position, the first connecting groove 221 at least partially overlaps with the negative pressure output port 214 and the adjustable power input port 216. At this time, the negative pressure output port 214 is connected to the adjustable power input port 216, and the negative pressure input port 211 is connected to the adjustable power output port 213. The negative pressure is input from the negative pressure input port 211, passes through the negative pressure output port 214 to the adjustable power input port 216, and is finally output from the adjustable power output port 213.

[0102] More specifically, when the switching valve core 22 is in the third position, the second connecting groove 222 at least partially overlaps with the negative pressure output port 214 and the full power input port 215. At this time, the negative pressure output port 214 is connected to the full power input port 215, and the negative pressure input port 211 is connected to the full power output port 212. The negative pressure is input from the negative pressure input port 211, passes through the negative pressure output port 214 to the full power input port 215, and is finally output from the full power output port 212.

[0103] In this embodiment, by controlling the rotation of the switching valve core 22, different channels are opened when it rotates to different positions. Finally, the negative pressure input is controlled according to different needs, and the negative pressure is controlled to be output from the adjustable power output port 213 or from the full power output port 212.

[0104] Example 7

[0105] Combination Figure 1 , Figure 5 As shown, the oxygen switching valve 3 provided in this embodiment also includes:

[0106] A linkage valve core 33 is located at the other end of the rotating shaft 11 and within the switch valve seat 31, and the linkage valve core 33 can rotate synchronously with the rotating shaft 11; and

[0107] Linkage slider 34 is located on the side of linkage valve core 33 away from rotating shaft core 11 and inside switch valve seat 31. Linkage valve core 33 is rotatably embedded in linkage slider 34. One end of switch valve shaft core 32 is connected to linkage slider 34. When linkage valve core 33 rotates, it can push linkage slider 34 to slide, thereby pushing switch valve shaft core 32 to move.

[0108] Specifically, the aforementioned linkage valve core 33 is located at the other end of the rotating shaft core 11 and within the switch valve seat 31. The rotation of the rotating shaft core 11 synchronously drives the linkage valve core 33 to rotate. A linkage slider 34 is also provided on the side of the linkage valve core 33 facing away from the rotating shaft core 11. The linkage valve core 33 is rotatably embedded in the linkage slider 34, which is located within the switch valve seat 31. One end of the linkage slider 34 is connected to one end of the switch valve shaft core 32. The rotation of the rotating shaft core 11 synchronously drives the linkage valve core 33 to rotate. The rotation of the linkage valve core 33 pushes the linkage slider 34 to slide. The sliding of the linkage slider 34 pushes the switch valve shaft core 32 to move away from or closer to the rotating shaft core 11 within the switch valve seat 31, ultimately controlling the connection or disconnection of the oxygen inlet 311 and the oxygen outlet 312.

[0109] In this embodiment, by setting a linkage valve core 33 and a linkage slider 34 in the oxygen switch valve 3, the linkage valve core 33 is rotated synchronously based on the rotation of the rotating shaft core 11, thereby pushing the linkage slider 34 to slide. Based on the sliding of the linkage slider 34, the switch valve shaft core 32 is pushed away from or closer to the rotating shaft core 11 in the switch valve seat 31, and finally the connection or disconnection control of the oxygen inlet 311 and the oxygen outlet 312 is realized.

[0110] Example 8

[0111] Combination Figure 5 , Figure 6 As shown, the linkage valve core 33 provided in this embodiment includes a valve core body 331 and push rods 332 disposed on both sides of the valve core body 331. The linkage slider 34 includes a slider body 341 and an embedding groove 342 disposed in the slider body 341. The slider body 341 is provided with a recess 3411 and a protrusion 3412 connected to the recess 3411 on the side facing the linkage valve core 33. The valve core body 331 is rotatably embedded in the embedding groove 342 so as to drive the push rods 332 to rotate between the recess 3411 and the protrusion 3412, thereby causing the slider body 341 to slide and the switch valve shaft core 32 to move.

[0112] Specifically, the linkage valve core 33 includes a valve core body 331 and push rods 332 symmetrically arranged on both sides of the valve core body 331. The valve core body 331 may be hollow cylindrical, and the push rods 332 extend outward and are cylindrical. The linkage slider 34 is provided with an embedding groove 342, in which the valve core body 331 is rotatably embedded. The slider body 341 facing the linkage valve core 33 has a recessed portion 3411 and a protruding portion 3412 opposite to the recessed portion 3411. The recessed portion 3411 and the protruding portion 3412 are connected, and the recessed portion 3411 and the protruding portion 3412 form a V-groove structure, so that the oxygen switch valve 3 can be activated by rotating counterclockwise or clockwise.

[0113] More specifically, when the rotating shaft 11 drives the linkage valve core 33 to rotate, the valve core body 331 rotates in the embedded groove 342, thereby driving the push rod 332 to rotate between the recessed portion 3411 and the protruding portion 3412, ultimately driving the slider body 341 to slide and the switching valve shaft 32 to move, so as to control the oxygen supply and demand, for example:

[0114] When the operating knob 12 is turned 60° in the opposite direction, the valve core body 331 of the linkage valve core 33 rotates, driving the push rod 332 to rotate on the recessed part 3411 and the protruding part 3412, pressing the slider body 341 to the right. The slider body 341 drives the switch valve shaft core 32 to the right, connecting the oxygen inlet 311 and the oxygen outlet 312, and oxygen is output from the oxygen outlet 312.

[0115] In this embodiment, the rotating shaft 11 synchronously drives the valve core body 331 to rotate, which in turn drives the push rod 332 to rotate between the recessed part 3411 and the protruding part 3412, thereby pushing the slider body 341 and the switching valve shaft 32 to move, ultimately realizing the connection or disconnection control of the oxygen inlet 311 and the oxygen outlet 312.

[0116] Example 9

[0117] When the push rod 332 provided in this embodiment rotates from the recessed part 3411 to the protruding part 3412, the linkage slider 34 is pushed to slide away from the linkage valve core 33, the switch valve core 32 is pushed to move by the linkage slider 34, and the oxygen inlet 311 is connected to the oxygen outlet 312.

[0118] When the push rod 332 rotates from the protrusion 3412 to the recess 3411, the switch valve core 32 resets and pushes the linkage slider 34 to move closer to the linkage valve core 33, thus disconnecting the oxygen inlet 311 from the oxygen outlet 312.

[0119] Specifically, when the push rod 332 rotates from the recessed portion 3411 to the protruding portion 3412, the linkage slider 34 is pushed to slide away from the linkage valve core 33. At this time, the switch valve shaft 32 is pushed to move by the linkage slider 34, and the oxygen inlet 311 is connected to the oxygen outlet 312, outputting oxygen at the oxygen outlet 312, and the negative pressure generator operates. When the push rod 332 rotates from the protruding portion 3412 to the recessed portion 3411, the switch valve shaft 32 resets and pushes the linkage slider 34 to move closer to the linkage valve core 33, disconnecting the oxygen inlet 311 from the oxygen outlet 312, resulting in no oxygen output at the oxygen outlet 312, and the negative pressure generator does not operate.

[0120] In this embodiment, by controlling the rotation direction of the push rod 332 between the recessed portion 3411 and the protruding portion 3412, the movement direction of the linkage slider 34 and the switching valve shaft 32 is controlled, thereby achieving the control of connecting or disconnecting the oxygen inlet 311 and the outlet, and thus achieving the control of oxygen input and output.

[0121] Example 10

[0122] Combination Figure 7 As shown, the switching valve shaft 32 provided in this embodiment includes:

[0123] The movable rod 321 has one end connected to the linkage slider 34 and the other end elastically connected to the switch valve seat 31.

[0124] The first sealing part 322 is located at the other end of the moving rod 321;

[0125] The second sealing part 323 is disposed between the first sealing part 322 and the linkage slider 34; and

[0126] The elastic element 324 is disposed between the first sealing part 322 and the switch valve seat 31, and applies a thrust to the first sealing part 322 in the direction of the linkage slider 34.

[0127] Specifically, one end of the aforementioned moving rod 321 is connected to the linkage slider 34, and the other end is elastically connected to the switch valve seat 31 via an elastic element 324. The elastic element 324 may include a spring. Driven by the rotation of the rotating shaft 11, the moving rod 321 can cause the switch valve shaft 32 to move away from or closer to the rotating shaft 11 within the switch valve seat 31. Simultaneously, a first sealing portion 322 is provided at the other end of the moving rod 321, and a second sealing portion 323 is provided between the first sealing portion 322 and the linkage slider 34. A spring can apply a pushing force to the first sealing portion 322 in the direction of the linkage slider 34.

[0128] In this embodiment, the moving rod 321 in the switching valve shaft 32 moves between the linkage slider 34 and the switching valve seat 31. When the moving rod 321 moves closer to the linkage slider 34, the second sealing part 323 controls the oxygen inlet 311 to disconnect from the oxygen outlet 312. When the moving rod 321 moves away from the linkage slider 34, the second sealing part 323 controls the oxygen inlet 311 to connect with the oxygen outlet 312, thus ultimately realizing the control of oxygen input and output.

[0129] Example 11

[0130] Combination Figure 7 As shown, the switch valve seat 31 provided in this embodiment is provided with a moving channel 313 and an air inlet chamber 314 connected to the moving channel 313. The oxygen outlet 312 is connected to the moving channel 313, and the oxygen inlet 311 is connected to the air inlet chamber 314. The switch valve core 32 can move in the moving channel 313 and the air inlet chamber 314.

[0131] When the switching valve shaft 32 moves close to the linkage slider 34, the second sealing part 323 seals the moving channel 313 and the air inlet chamber 314, the moving channel 313 is disconnected from the air inlet chamber 314, and the oxygen inlet 311 is disconnected from the oxygen outlet 312.

[0132] When the switch valve shaft 32 moves away from the linkage slider 34, the second sealing part 323 opens the moving channel 313 and the air inlet chamber 314, and the moving channel 313 and the air inlet chamber 314 are connected, and the oxygen inlet 311 and the oxygen outlet 312 are connected.

[0133] Specifically, the switch valve seat 31 is also provided with a moving channel 313 and an air inlet chamber 314 connected to the moving channel 313. The oxygen outlet 312 is connected to the moving channel 313 and the air inlet chamber 314. The switch valve core 32 can move in the moving channel 313 and the air inlet chamber 314 to control the connection or disconnection of the oxygen outlet 312 and the oxygen inlet 311.

[0134] More specifically, when the switch valve shaft 32 moves closer to the linkage slider 34, the second sealing part 323 seals the moving channel 313 and the air intake chamber 314. At this time, the moving channel 313 is disconnected from the air intake chamber 314, and the oxygen inlet 311 is disconnected from the oxygen outlet 312, resulting in no oxygen output. When the switch valve shaft 32 moves away from the linkage slider 34, the second sealing part 323 opens the moving channel 313 and the air intake chamber 314. At this time, the moving channel 313 is connected to the air intake chamber 314, and the oxygen inlet 311 is connected to the oxygen outlet 312, resulting in oxygen output at the oxygen outlet 312.

[0135] In this embodiment, by providing a movable channel 313 communicating with the oxygen inlet 311 and an air intake chamber 314 communicating with the oxygen outlet 312 on the switch valve seat 31, and the air intake chamber 314 communicating with the movable channel 313, the movable channel 313 and the air intake chamber 314 are sealed or opened by the second sealing part 323 according to the moving direction of the switch valve shaft core 32 relative to the linkage slider 34, thereby controlling the connection and disconnection of the oxygen inlet 311 and the oxygen outlet 312, and thus realizing the control of oxygen input and output.

[0136] Example 12

[0137] Combination Figure 1 , Figure 5 and Figure 7 As shown, the rotating shaft core 11, switching valve core 22, switching valve shaft core 32, linkage valve core 33 and linkage slider 34 provided in this embodiment are coaxially arranged.

[0138] Specifically, the rotating shaft 11, the switching valve core 22, the switching valve shaft 32, the linkage valve core 33, and the linkage slider 34 are coaxially arranged. When the control knob 12 is rotated, it can drive the rotating shaft 11, the switching valve core 22, and the linkage valve core 33 to rotate coaxially, and drive the switching valve core 32 to move in the switching valve seat 31 as the rotating shaft 11 rotates. Under the rotation of the linkage valve core 33, the linkage slider 34 is pushed to slide, thereby pushing the switching valve shaft 32 to move.

[0139] In this embodiment, by coaxially arranging the rotating shaft 11, switching valve core 22, switching valve shaft 32, linkage valve core 33, and linkage slider 34, the oxygen switching valve 3 and negative pressure switching valve 2 can be better synchronized and linked based on the rotation of the rotating shaft 11. At the same time, the negative pressure output and oxygen on / off can be controlled, making the operation simpler, reducing the negative pressure response time, and improving the operating efficiency of the negative pressure generator.

[0140] Example 13

[0141] Combination Figure 6 As shown, in this embodiment, there are two recesses 3411 and two protrusions 3412, with the two recesses 3411 being arranged opposite each other and the two protrusions 3412 being arranged opposite each other.

[0142] Specifically, two recesses 3411 and two protrusions 3412 can be provided, and the two recesses 3411 can be symmetrically arranged. Similarly, the two protrusions 3412 can also be symmetrically arranged, with a recess 3411 spaced between each protrusion 3412. Likewise, a protrusion 3412 spaced between each recess 3411. The recess 3411 can have a V-shaped groove structure, allowing rotation in both reverse and reverse directions.

[0143] Example 14

[0144] Combination Figure 6 As shown, the recessed portion 3411 provided in this embodiment has inclined surfaces on both sides, and the protruding portion 3412 has a plane connected to the inclined surfaces.

[0145] Specifically, the two sidewalls of the recess 3411 can be set as inclined surfaces, and the protrusion 3412 can be set as a plane connected to the inclined surface, allowing the push rod 332 to rotate on the inclined surface. Setting the recess 3411 as an inclined surface makes it easier for the push rod 332 to rotate and can provide a thrust for the sliding of the linkage slider 34 to push the switch valve shaft 32 to move.

[0146] Example 15

[0147] Combination Figure 1 As shown, the negative pressure switching valve 2 provided in this embodiment also includes a sealing gasket 24 disposed between the switching valve core 22 and the switching valve seat 21. The sealing gasket 24 has through holes corresponding to the negative pressure output port 214, the full power input port 215 and the adjustable power input port 216 respectively.

[0148] Specifically, the size of the sealing gasket 24 is relative to the size and structure of the switching valve core 22, and through holes are provided on the sealing gasket 24 that correspond to the size, position and shape of the negative pressure output port 214, the full power input port 215 and the adjustable power input port 216. The provision of the corresponding through holes will not obstruct the input and output of negative pressure.

[0149] Example 16

[0150] Combination Figure 5 As shown, the switch valve seat 31 provided in this embodiment includes:

[0151] Valve seat body 315, the switch valve shaft 32 is movably disposed within the valve seat body 315; and

[0152] The base plate 316 is located on the side of the valve seat body 315 away from the linkage slider 34. The base plate 316 is provided with a limiting groove 317. The elastic element 324 elastically abuts against the limiting groove 317 and the first sealing part 322. A sealing ring 318 is also provided between the base plate 316 and the valve seat body 315.

[0153] Specifically, the valve shaft 32 can be movably mounted inside the valve seat body 315, and the oxygen inlet 311 and oxygen outlet 312 can be detachably connected to the valve seat body 315. A base plate 316 is provided at the end of the valve seat body 315 away from the linkage slider 34, and a limiting groove 317 is provided on the base plate 316. One end of the elastic element 324 abuts between the limiting groove 317 and the first sealing part 322. A sealing groove 319 can be formed on the valve seat body 315, located at the end of the valve seat body 315 that contacts the base plate 316. A sealing ring 318 is provided between the base plate 316 and the valve seat body 315, and the sealing ring 318 can be placed in the sealing groove 319 for sealing control.

[0154] In this embodiment, the valve seat body 315 is set to allow the switching valve shaft 32 to be movably disposed in the valve seat body 315, and a base plate 316 is set, with a limiting groove 317 formed on the base plate 316, and the elastic element 324 is abutted between the limiting groove 317 and the first sealing part 322 to achieve limiting.

[0155] Example 17

[0156] This invention also provides an anesthesia machine, comprising:

[0157] Body; and

[0158] According to any embodiment of the linkage negative pressure switch switching valve, the linkage negative pressure switch switching valve is located inside the machine body.

[0159] Specifically, the anesthesia machine provided in this embodiment includes a machine body and a linkage negative pressure switch valve as described in any embodiment. The linkage negative pressure switch valve is installed in the machine body. In the linkage negative pressure switch valve, the switching valve core 22 in the negative pressure switch valve 2 can rotate relative to the switching valve seat 21 in the negative pressure switch valve 2 as the rotating shaft core 11 in the knob assembly 1 rotates, so as to switch the negative pressure output of the negative pressure switch valve 2. At the same time, the switching valve core 32 in the oxygen switch valve 3 is connected to the other end of the rotating shaft core 11 and can move in the switching valve seat 31 as the rotating shaft core 11 rotates, so as to control the oxygen on / off of the oxygen switch valve 3. Thus, based on the rotation of the rotating shaft core 11, the oxygen switch valve 3 and the negative pressure switch valve 2 are synchronously linked and controlled, which can simultaneously control the negative pressure output and the oxygen on / off. The operation is simpler, the negative pressure response time can be reduced, the operating efficiency of the negative pressure generator can be improved, and the impact on the operation time can be reduced.

[0160] Therefore, the anesthesia machine provided in this embodiment can also achieve the above embodiments and the corresponding technical effects, and will not be described in detail here.

[0161] The terms "first," "second," etc., used in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects and not to describe a particular order. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0162] The above are merely preferred embodiments 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 within the protection scope of the present invention.

Claims

1. A linkage-type negative pressure switch switching valve, characterized in that, include: Knob assembly; A negative pressure switching valve includes a switching valve seat and a switching valve core disposed on one side of the switching valve seat. A knob assembly passes through the switching valve seat and the switching valve core. The switching valve core can rotate relative to the switching valve seat as the knob assembly rotates, so as to switch the negative pressure output of the negative pressure switching valve. as well as An oxygen switching valve includes a switching valve seat located on the other side of the switching valve seat and a switching valve shaft disposed in the switching valve seat. The switching valve shaft is kinetically connected to the knob assembly and can move in the switching valve seat as the knob assembly rotates, so as to control the oxygen supply and demand of the oxygen switching valve. The switching valve seat is provided with a negative pressure input port, a full power output port and an adjustable power output port. When the switching valve core rotates relative to the switching valve seat, the negative pressure input port can be connected to or disconnected from one of the full power output port and the adjustable power output port. The switch valve seat is provided with an oxygen inlet and an oxygen outlet. The switch valve shaft can move away from or near the knob assembly in the switch valve seat as the knob assembly rotates, so that the oxygen inlet and the oxygen outlet are connected or disconnected. When the negative pressure input port is disconnected from both the full power output port and the adjustable power output port, the oxygen inlet is disconnected from the oxygen outlet. When the negative pressure input port is connected to the full power output port or the adjustable power output port, the oxygen inlet is connected to the oxygen outlet. The oxygen switching valve also includes: A linkage valve core, wherein the linkage valve core is located at one end of the knob assembly that is drively connected to the shaft of the switch valve and is situated within the switch valve seat, and the linkage valve core can rotate synchronously with the knob assembly; and A linkage slider is provided on the side of the linkage valve core away from the knob assembly and located in the switch valve seat. The linkage valve core is rotatably embedded in the linkage slider. One end of the switch valve shaft is connected to the linkage slider. When the linkage valve core rotates, it can push the linkage slider to slide, thereby pushing the switch valve shaft to move. The knob assembly includes: A rotating shaft, one end of which passes through the switching valve seat and the switching valve core, and is drively connected to the switching valve shaft; and An operating knob is located on the end of the rotating shaft away from the switching valve seat.

2. The linkage-type negative pressure switch switching valve according to claim 1, characterized in that, The switching valve core can rotate with the knob assembly between a first position, a second position, and a third position relative to the switching valve seat, thereby disconnecting the negative pressure input port from both the full power output port and the adjustable power output port, connecting the negative pressure input port to the adjustable power output port, or connecting the negative pressure input port to the full power output port.

3. The linkage-type negative pressure switch switching valve according to claim 2, characterized in that, The switching valve seat is further provided with a negative pressure output port, a full power input port and an adjustable power input port on the side facing the switching valve core, respectively connected to the negative pressure input port, the full power output port and the adjustable power output port. The switching valve core is provided with a first connecting groove and a second connecting groove spaced apart from the first connecting groove on the side facing the switching valve seat. The first connecting groove can connect the negative pressure output port and the adjustable power input port as the switching valve core rotates, so that the negative pressure input port and the adjustable power output port are connected. The second connecting groove can connect the negative pressure output port and the full power input port as the switching valve core rotates, so that the negative pressure input port and the full power output port are connected.

4. The linkage-type negative pressure switch switching valve according to claim 3, characterized in that, When the switching valve core is in the first position, neither the first connecting groove nor the second connecting groove coincides with the negative pressure output port. The negative pressure output port is disconnected from both the full power input port and the adjustable power input port. The negative pressure input port is disconnected from both the full power output port and the adjustable power output port. When the switching valve core is in the second position, the first connecting groove at least partially overlaps with the negative pressure output port and the adjustable power input port, the negative pressure output port is connected to the adjustable power input port, and the negative pressure input port is connected to the adjustable power output port. When the switching valve core is in the third position, the second connecting groove at least partially overlaps with the negative pressure output port and the full power input port, the negative pressure output port is connected to the full power input port, and the negative pressure input port is connected to the full power output port.

5. The linkage-type negative pressure switch switching valve according to claim 1, characterized in that, The linkage valve core includes a valve core body and push rods disposed on both sides of the valve core body. The linkage slider includes a slider body and an embedding groove disposed in the slider body. The slider body has a recessed portion and a protrusion connected to the recessed portion on the side facing the linkage valve core. The valve core body is rotatably embedded in the embedding groove so as to drive the push rod to rotate between the recessed portion and the protrusion, thereby causing the slider body to slide and the switching valve shaft to move.

6. The linkage-type negative pressure switch switching valve according to claim 5, characterized in that, When the push rod rotates from the recess to the protrusion, the linkage slider is pushed to slide away from the linkage valve core, the switch valve shaft is pushed to move by the linkage slider, and the oxygen inlet is connected to the oxygen outlet. When the push rod rotates from the protrusion to the recess, the switch valve shaft resets and pushes the linkage slider to move closer to the linkage valve core, thus disconnecting the oxygen inlet from the oxygen outlet.

7. The linkage-type negative pressure switch switching valve according to claim 1, characterized in that, The switching valve shaft includes: A movable rod, one end of which is connected to the linkage slider, and the other end of which is elastically connected to the switch valve seat; The first sealing part is located at the other end of the moving rod; A second sealing portion is disposed between the first sealing portion and the linkage slider; and An elastic element is disposed between the first sealing portion and the switch valve seat, and applies a thrust to the first sealing portion in the direction of the linkage slider.

8. The linkage-type negative pressure switch switching valve according to claim 7, characterized in that, The switch valve seat is provided with a moving channel and an air inlet chamber connected to the moving channel. The oxygen outlet is connected to the moving channel, and the oxygen inlet is connected to the air inlet chamber. The switch valve shaft can move in the moving channel and the air inlet chamber. When the switching valve shaft moves close to the linkage slider, the second sealing part seals the moving channel and the air inlet chamber, the moving channel is disconnected from the air inlet chamber, and the oxygen inlet is disconnected from the oxygen outlet; When the switching valve shaft moves away from the linkage slider, the second sealing part opens the moving channel and the air inlet chamber, the moving channel is connected to the air inlet chamber, and the oxygen inlet is connected to the oxygen outlet.

9. The linkage-type negative pressure switch switching valve according to claim 1, characterized in that, The knob assembly, the switching valve core, the switch valve shaft core, the linkage valve core, and the linkage slider are coaxially arranged.

10. The linkage-type negative pressure switch switching valve according to claim 5, characterized in that, There are two recesses and two protrusions, with the two recesses and the two protrusions arranged opposite each other.

11. The linkage-type negative pressure switch switching valve according to claim 5, characterized in that, The recessed portion has inclined surfaces on both sides, and the protruding portion has a plane connected to the inclined surfaces.

12. The linkage-type negative pressure switch switching valve according to claim 3, characterized in that, The negative pressure switching valve also includes a sealing gasket disposed between the switching valve core and the switching valve seat, and the sealing gasket has through holes corresponding to the negative pressure output port, the full power input port and the adjustable power input port respectively.

13. The linkage-type negative pressure switch switching valve according to claim 7, characterized in that, The switch valve seat includes: A valve seat body, wherein the switching valve shaft is movably disposed within the valve seat body; and A base plate is provided on the side of the valve seat body away from the linkage slider. A limiting groove is provided on the base plate. The elastic element elastically abuts against the limiting groove and the first sealing part. A sealing ring is also provided between the base plate and the valve seat body.

14. An anesthesia machine, characterized in that, include: Organism; as well as According to any one of claims 1 to 13, the linkage negative pressure switch switching valve is disposed in the machine body.

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