Electric control bypass valve and anaesthesia machine

Abstract

The invention provides an electric control bypass valve and an anaesthesia machine. The electric control bypass valve comprises a carrier gas shunting block and a switching valve control block which are detachably connected. And the switching valve control block is used for controlling the reciprocating motion of the valve shaft so as to control the opening and closing actions of a flow channel in the carrier gas shunting block, thereby completing the switching of gas paths. The carrier gas flow dividing block is used for guiding carrier gas (common fresh gas in an anaesthesia machine) to enter the volatilization tank to take away medicine of a specified dose or skip the volatilization tank, and airflow necessary for breathing is directly provided for a patient. The device has the advantages that the bypass valve is detachably connected with the interface of the volatilization tank, so that the interface is convenient to disinfect; by controlling opening and closing of the electromagnetic valves, the volatilization tanks can be conveniently and selectively used, and switching is rapid and accurate; medical negligence caused by mixed use of anesthetic gas is prevented through interlocking control between the electromagnetic valves; when the concentration of the anesthetic gas is abnormal, whether an abnormal accident is caused by the fault of the bypass valve or not can be quickly judged by naked eyes.

Description

Technical Field

[0001] The present application belongs to the technical field of anesthesia machines, and specifically relates to an electric-controlled bypass valve and anesthesia machines. Background Art

[0002] The latest development direction of the new generation of anesthesia machines is electronic, digital, and intelligent, so the electronic control of related components will be particularly important. As an important component of the anesthesia machine, the bypass valve, its structure, performance, and control method are of great significance to improving the safety and reliability of the anesthesia machine. In the future, with the continuous advancement of medical technology and the continuous development of the market, the electronic control, intelligence, automation, and multifunctionality of the bypass valve will make greater contributions to the medical industry.

[0003] The bypass valves of existing anesthesia machines are mostly reserved for mechanical vaporizers, and different vaporizers cannot be selected by operating the anesthesia machine operation panel. Some anesthesia machines are equipped with bypass valves with simple structures, but only one vaporizer can be mounted at a time during use. If two vaporizers are mounted at the same time, the medical risks caused by the mixing of two types of anesthetic drugs will increase. In addition, the above-mentioned bypass valve interface is exposed to the air, becoming a breeding ground for bacteria. Due to the lack of independent disassembly design, it becomes extremely difficult to thoroughly sterilize and disinfect it. Some anesthesia machines are equipped with bypass valves with hidden structures that can mount two vaporizers at the same time, but visual fault identification is impossible during use, and the lack of independent disassembly design cannot support independent disassembly disinfection tasks.

[0004] In summary, the bypass valve of the existing anesthesia machine has the following defects:

[0005] 1. The bypass valve equipped with the current anesthesia machine lacks electronic control function, which limits its flexibility in surgery. Different types of anesthetics will be used due to special requirements such as different patients and different surgeries. However, the existing anesthesia machine can only install one vaporizer at a time. When switching between different drugs, medical staff need to manually perform cumbersome switching operations.

[0006] 2. The existing anesthesia machine system fails to realize easy switching of different types of vaporizers to output corresponding anesthetic drugs through screen operation. This limitation reduces the efficiency and convenience of doctors in arranging operations.

[0007] 3. The bypass valve interface used in the anesthesia machine is complex in design, which not only increases the difficulty and time cost of the installation process, but also the matching vaporizer interface is also complicated in structure, which brings unnecessary challenges to maintenance work.

[0008] 4. The connection between the existing bypass valve and the vaporizer interface is exposed to the air when not in use, which becomes a breeding ground for bacteria. Unfortunately, this part lacks an independent disassembly design, making it extremely difficult to sterilize it thoroughly.

[0009] 5. When the anesthesia machine uses a vaporizer, if abnormal concentration occurs, such as too small or no concentration output, maintenance personnel cannot accurately determine with the naked eye whether the fault is caused by the bypass valve during diagnosis. Summary of the invention

[0010] The purpose of the present application is to overcome the defects of the prior art, such as inconvenient interface disinfection, complicated operation of switching vaporizers, and difficulty in troubleshooting the causes when abnormalities occur.

[0011] In order to achieve the above-mentioned purpose, the present application proposes an electrically controlled bypass valve, comprising a switching valve control block and a carrier gas diversion block; wherein,

[0012] The switching valve control block comprises:

[0013] A control block seat approximately in the shape of a rectangular parallelepiped, with a plurality of gas pipelines inside;

[0014] A first carrier gas pipeline opening, a second carrier gas pipeline opening, a third carrier gas pipeline opening and a fourth carrier gas pipeline opening are located on the side of the control block seat; the first carrier gas pipeline opening is connected to the third carrier gas pipeline opening through the gas pipeline inside the control block seat; the second carrier gas pipeline opening is connected to the fourth carrier gas pipeline opening through the gas pipeline inside the control block seat;

[0015] A first carrier gas connector, fixedly connected to the opening of the third carrier gas pipeline;

[0016] A second carrier gas connector, fixedly connected to the opening of the fourth carrier gas pipeline;

[0017] a first drive gas pipeline opening and a second drive gas pipeline opening located on the side of the control block seat;

[0018] A two-position, three-position normally open solenoid valve fixed on the side of the control block seat;

[0019] N two-position, three-position normally closed solenoid valves are fixed on the side of the control block seat;

[0020] The first driving gas pipeline opening is connected to the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve through the gas pipeline inside the control block seat, and is used to provide driving gas for the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve;

[0021] The second driving gas pipeline opening is connected to the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve through the gas pipeline inside the control block seat, and is used to discharge the waste gas generated by the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve; and

[0022] 2N+1 pneumatic piston assemblies, each pneumatic piston assembly includes: a valve hole, a valve core, a piston and a spring; wherein,

[0023] The piston is a cylindrical structure; the valve core body is cylindrical; one end of the valve core body is a cylindrical valve head with a diameter thicker than the body, and the other end is fixedly connected to the middle of one end face of the piston; the diameter of the piston is larger than the diameter of the valve core body; the valve hole runs through the front and back of the control block seat, and is a spindle-shaped hole with a small middle and large sides; the valve hole accommodates the valve core and the piston, and the valve core is located on the front of the control block seat; the spring is sleeved on the valve core body, and one end is fitted with the valve head; the outer diameter of the spring is smaller than the outer diameter of the valve head and larger than the middle diameter of the valve hole; when the spring is in an open state, there is a gap between the end face of the piston and the bottom of the thicker diameter part of the valve hole near the back of the control block seat; the gap is connected to one of the two-position three-way normally closed solenoid valve or the two-position three-way normally open solenoid valve through the gas pipeline;

[0024] The pneumatic piston assembly has a ventilated state and a non-ventilated state;

[0025] The two-position three-position normally open solenoid valve is connected to the gap of one of the pneumatic piston assemblies through a gas pipeline inside the control block seat;

[0026] One of the two-position, three-position normally closed solenoid valves is connected to the gaps between the two pneumatic piston assemblies through a gas pipeline inside the control block seat;

[0027] The carrier gas splitter block is detachably connected to the front side of the control block seat, comprising:

[0028] An air flow channel seat, which has a plurality of gas pipelines inside;

[0029] 1 gas port on the back side of the carrier gas splitter block, sealed and connected to the second carrier gas connector;

[0030] The fifth through hole, the sixth through hole and the 2N through holes connected to the volatilizer all pass through the airflow channel seat; wherein,

[0031] The fifth through hole is sealedly connected to the first carrier gas connector; the 2N through holes connected to the volatilizer are divided into N pairs, each pair includes 2 through holes connected to the volatilizer; each pair of through holes connected to the volatilizer is connected through the gas pipeline of the gas flow channel seat; in each pair of through holes connected to the volatilizer, one is connected to the gas pipeline of the gas flow channel seat through the fifth through hole, and the other through hole is connected to the gas port through the gas pipeline of the gas flow channel seat; the sixth through hole is connected to the gas port through the gas pipeline of the gas flow channel seat;

[0032] A bridge joint located on the front side of the airflow channel seat, connecting the fifth through hole and the sixth through hole;

[0033] 2N+1 sealing valves; each of the sealing valves comprises: a sealing sleeve and a valve shaft; wherein,

[0034] The sealing sleeve is in the shape of a flexible disc; the valve shaft is in the shape of a column; the center of one end surface of the sealing sleeve is fixedly connected to one end of the valve shaft;

[0035] The 2N+1 sealing valves are inserted into the sixth through hole and the 2N through holes connected to the vaporizer from the back of the airflow channel seat in a manner that the valve shaft is outward; the sealing sleeve is interference-fitted with the inner wall of the through hole;

[0036] One end of the valve shaft of the sealing valve in the fifth through hole away from the sealing valve is detachably connected to the valve head of the pneumatic piston assembly of the control block seat that is in communication with the two-position three-position normally open solenoid valve;

[0037] In N pairs of through holes connected to the vaporizer, one end of the valve shaft of the sealing valve in each pair of through holes connected to the vaporizer away from the sealing valve is detachably connected to the valve heads of the two pneumatic piston assemblies connected to the two-position three-way normally closed solenoid valve of the control block seat.

[0038] As an improvement of the above-mentioned electrically controlled bypass valve, the other end of the valve shaft away from the sealing sleeve has a button-shaped sleeve joint;

[0039] The valve head of the valve core has a groove on the outer end surface;

[0040] When the switching valve control block is connected to the carrier gas diversion block, the sleeve joint is sleeved and fixed in the corresponding groove.

[0041] As an improvement of the above-mentioned electric-controlled bypass valve, the ventilation state of the pneumatic piston assembly is: the piston is close to the back side of the control block seat, the spring is in a compressed state, most of the valve head is located in the valve hole, and the through hole where the sealing valve is located allows the carrier gas to pass through;

[0042] The airless state of the pneumatic piston assembly is: the piston is away from the back side of the control block seat, the spring is in an open state, most of the valve head is located outside the valve hole, and the sealing valve closes the through hole.

[0043] As an improvement of the above-mentioned electrically controlled bypass valve, the two-position three-position normally open solenoid valve and the two-position three-position normally closed solenoid valve are in a non-energized state by default.

[0044] As an improvement of the above-mentioned electrically controlled bypass valve, the two-position three-position normally open solenoid valve and the N two-position three-position normally closed solenoid valves have interlocking control;

[0045] The interlock control includes: only one of the two-position three-position normally closed solenoid valve can be energized at the same time; when the two-position three-position normally closed solenoid valve is energized, the two-position three-position normally open solenoid valve is also energized.

[0046] As an improvement of the above-mentioned electrically controlled bypass valve, the front side of the airflow channel seat is made of transparent material.

[0047] As an improvement of the above-mentioned electrically controlled bypass valve, the pneumatic piston assembly further includes a first annular sealing ring and a second annular sealing ring;

[0048] A first annular groove is provided in the middle of the valve core body; the first annular sealing ring is sleeved in the first annular groove and has an interference fit with the inner wall of the valve hole; a second annular groove is provided on the cylindrical side of the piston; the second annular sealing ring is sleeved in the second annular groove and has an interference fit with the inner wall of the valve hole.

[0049] As an improvement of the above-mentioned electrically controlled bypass valve, the switching valve control block further includes:

[0050] a carrier gas inlet connector detachably connected to the first carrier gas pipeline opening;

[0051] a carrier gas outlet connector detachably connected to the second carrier gas pipeline opening;

[0052] A driving gas inlet connector is detachably connected to the first driving gas pipeline opening.

[0053] As an improvement of the above-mentioned electrically controlled bypass valve, N is an integer greater than or equal to 2.

[0054] The present application also provides an anesthesia machine having the above-mentioned electrically controlled bypass valve.

[0055] Compared with the prior art, the advantages of this application are:

[0056] 1. The interface between the bypass valve and the vaporizer is detachable, which is convenient for disinfection of the interface;

[0057] 2. By controlling the opening and closing of the solenoid valve, the volatilizer can be conveniently and selectively used, and the switching is fast and accurate;

[0058] 3. Prevent medical accidents caused by mixing of anesthetic gases through interlocking control between solenoid valves;

[0059] 4. When the concentration of anesthetic gas is abnormal, you can quickly determine with the naked eye whether the bypass valve is faulty and causing the abnormal accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 The figure shows the left side view of the electric control bypass valve;

[0061] Figure 2 Shown is the front view of the electric-controlled bypass valve;

[0062] Figure 3 Shown is a front view of the switching valve control block;

[0063] Figure 4 Shown is a rear view of the switching valve control block;

[0064] Figure 5 Shown is a longitudinal sectional view of the switching valve control block;

[0065] Figure 6 The figure shows the valve core structure diagram;

[0066] Figure 7 Shown is a front view of the carrier gas splitter block;

[0067] Figure 8 Shown is a three-dimensional front view of the carrier gas splitter block;

[0068] Fig. 9 Shown is a three-dimensional view of the back side of the carrier gas splitter block;

[0069] Fig.10 The diagram shows the structure of the sealing valve;

[0070] Fig.11 The figure shows the principle diagram of the gas circuit of the electric-controlled bypass valve;

[0071] Fig.12 The figure shows the logic block diagram of the gas circuit switching of the electric bypass valve. DETAILED DESCRIPTION

[0072] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0073] The present application provides an electrically controlled bypass valve, which can realize the precise switching of the vaporizer of the corresponding tank position through the operation screen of the anesthesia machine, so as to output the required anesthetic drugs. More importantly, an interlocking function is configured between different tank positions, which fundamentally avoids the accidental mixing of different types of anesthetic drugs during surgery and effectively reduces the risk of surgery. In addition, the present application also cleverly designs the carrier gas flow channel of the bypass valve as a detachable assembly, which greatly facilitates the cleaning and sterilization of the carrier gas flow channel after surgery, ensuring the hygiene and safety of the equipment. Taking into account the convenience of fault diagnosis after the anesthesia machine outputs abnormal anesthetic gas, the present application also visualizes the control unit, which enables maintenance personnel to visually distinguish whether the bypass valve is in a faulty state.

[0074] like Figure 1 and Figure 2 As shown, the electrically controlled bypass valve provided by the present application includes a switching valve control block 100 and a carrier gas diversion block 200. The function of the switching valve control block 100 is to control the reciprocating motion of the valve shaft and thus control the opening and closing action of the flow channel in the carrier gas diversion block 200 to complete the switching of the gas circuit. The function of the carrier gas diversion block 200 is to guide the carrier gas (the fresh gas commonly used in the anesthesia machine) into the vaporizer to take away the specified dose of the drug or skip the vaporizer to directly provide the patient with the necessary airflow for breathing.

[0075] For the convenience of description, this application uses Figure 2 The front view is shown, and the descriptions of the front, back, left side, right side and upper side in the subsequent descriptions are based on this view.

[0076] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the switching valve control block 100 may include a control block seat 105 that is approximately in the shape of a rectangular parallelepiped, and has a plurality of gas pipelines and through holes inside.

[0077] The right side of the control block seat 105 may have a first carrier gas pipeline opening, which may be detachably connected to the carrier gas inlet connector 101, serving as an inlet for the anesthesia machine to input carrier gas to the bypass valve. The back side of the control block seat 105 may have a first drive gas pipeline opening, which may be detachably connected to the drive gas inlet connector 104. The upper side of the control block seat 105 may also be fixedly connected to the first two-position three-way normally closed solenoid valve 102-1, the second two-position three-way normally closed solenoid valve 102-2, and the two-position three-way normally open solenoid valve 103. In other embodiments, the first carrier gas pipeline opening and the first drive gas pipeline opening may also be located at other places of the control block seat 105 according to the different structures of the bypass valve and the anesthesia machine. The number of the two-position three-way normally closed solenoid valves may vary according to the number of vaporizers that the anesthesia machine needs to load, and one vaporizer may correspond to one two-position three-way normally closed solenoid valve.

[0078] The first two-position, three-position normally closed solenoid valve 102 - 1 and the second two-position, three-position normally closed solenoid valve 102 - 2 can respectively control the opening and closing of a flow channel of a vaporizer.

[0079] The two-position, three-way normally open solenoid valve 103 can control the opening and closing of the flow path for the carrier gas to bypass the vaporizer and directly enter the breathing circuit of the anesthesia machine.

[0080] The driving air inlet connector 104 can provide 250 kPa driving air flow to the first two-position three-way normally closed solenoid valve 102-1, the second two-position three-way normally closed solenoid valve 102-2 and the two-position three-way normally open solenoid valve 103 through the driving air pipeline inside the control block seat 105 as the power to control the opening and closing of the valves.

[0081] The control block seat 105 may have five valve holes 116 extending through the front and back sides thereof. Each valve hole 116 may accommodate a valve core 110. Figure 6As shown, the main body 117 of the valve core 110 may be cylindrical, and the middle part thereof may have a first annular groove 118, and the first annular sealing ring 115 may be sleeved on the first annular groove 118. One end of the valve core main body 117 may be a cylindrical valve head 119 with a diameter thicker than the main body 117. The outer end surface of the valve head 119 may have a groove 120. The middle part of the valve hole 116 has a thinner diameter, which can accommodate the main body 117 of the valve core 110, and the side close to the front of the control block seat 105 has a thicker diameter, which can accommodate the valve head 119 of the valve core 110. The depth of the thicker diameter part of the valve hole 116 close to the front of the control block seat 105 may be greater than the length of the valve head 119. Before the valve core 110 is placed in the valve hole 116, the spring 109 is first sleeved on the valve core main body 117, and then placed in the valve hole 116. The outer diameter of the spring 119 is larger than the diameter of the middle part of the valve hole 116, and smaller than the outer diameter of the valve head 119. The end surface of the valve head 119 close to the valve core 110 may have a third annular groove, which can accommodate one end of the spring 109, limit the left and right swing of the spring, and improve the service life. When the spring 109 is not under force, it is in an open state, so that most of the valve head 119 can be exposed outside the valve hole 116; when the spring 109 is compressed by force, it is in a compressed state, at this time, most of the valve head 119 can enter the valve hole 116. The part of the valve hole 116 that accommodates the valve head 119 may have an annular protrusion, which is used to limit the compression amount of the valve head 119 on the spring 109. When the valve core 110 enters the valve hole 116, the first annular sealing ring 115 can be interference fit with the middle part of the valve hole 116 to prevent gas from flowing around the valve core 110. The diameter of the valve hole 116 close to the back side of the control block seat 105 can be larger than the diameter of the middle part of the valve hole 116, which can accommodate the cylindrical piston 106. The height of the piston 106 is less than the depth of the thicker diameter of the valve hole 116 near the back side of the control block seat 105. The cylindrical side of the piston 106 may have a second annular groove, and a second annular sealing ring 108 may be sleeved. The second annular sealing ring 108 may be interference fit with the valve hole 116 to prevent gas from flowing out from all around the piston 106. The middle part of the piston 106 may be fixedly connected to the end of the valve core 110 away from the valve head 119. When the piston 106 penetrates into the valve hole 116 and the spring 109 is in an open state, the end face of the piston 106 does not contact the bottom of the thicker diameter end of the valve hole 116, and a gap 121 may be formed between the end face of the piston 106 and the bottom of the thicker diameter end of the valve hole 116. The middle part of the end face of the piston 106 near the front side of the control block seat 105 may have a protrusion, which can ensure that there is a gap 121 between the end face of the piston 106 and the bottom of the thicker diameter end of the valve hole 116. The gap 121 may have a driving gas pipeline opening connected to the first two-position three-position normally closed solenoid valve 102 - 1 , the second two-position three-position normally closed solenoid valve 102 - 2 , or the two-position three-position normally open solenoid valve 103 .When the driving gas is injected into the gap 121, the piston 106 can be pressed to move toward the back of the control block seat 105, and the valve core 110 is also driven to move toward the back of the control block seat 105, while compressing the spring 109. When the driving gas in the gap 121 is released, the valve core 110 can move toward the front of the control block seat 105 under the action of the spring 109. The valve hole 116, the valve core 110, the piston 106, the spring 109, the first annular sealing ring 115 and the second annular sealing ring 108 together constitute a pneumatic piston assembly. The pneumatic piston assembly can reciprocate under the drive of the first two-position three-way normally closed solenoid valve 102-1, the second two-position three-way normally closed solenoid valve 102-2 or the two-position three-way normally open solenoid valve 103. In other embodiments, the number of pneumatic piston assemblies can be changed according to the number of vaporizers that the anesthesia machine needs to load, and one vaporizer needs to correspond to two pneumatic piston assemblies, and another two-position three-way normally open solenoid valve needs to correspond to one pneumatic piston assembly.

[0082] The first two-position three-way normally closed solenoid valve 102-1 and the second two-position three-way normally closed solenoid valve 102-2 are each connected to two pneumatic piston assemblies. When no power is supplied, the pneumatic piston assemblies they are connected to are in a non-ventilated state, that is, the gap 121 is small, the piston 106 is away from the back side of the control block seat 105, the spring 109 is in an open state, and most of the valve head 119 is located outside the valve hole 116; when power is supplied, the pneumatic piston assemblies they are connected to are in a ventilated state, that is, the gap 121 is large, the piston 106 is close to the back side of the control block seat 105, the spring 109 is in a compressed state, and most of the valve head 119 is located inside the valve hole 116.

[0083] The two-position three-way normally open solenoid valve 103 can be connected to a pneumatic piston assembly. When not powered on, the pneumatic piston assembly it is connected to is in a ventilated state; when powered on, the pneumatic piston assembly it is connected to is in a non-ventilated state.

[0084] The left side of the control block seat 105 may have a second carrier gas pipeline opening, which may be detachably connected to a carrier gas outlet connector 107, which is a connector for the bypass valve carrier gas output and is connected to the ACGO module and the breathing circuit in the anesthesia machine. In other embodiments, the second carrier gas pipeline opening may also be located elsewhere on the control block seat 105 according to the different structures of the bypass valve and the anesthesia machine.

[0085] The front of the control block seat 105 may have a third carrier gas pipeline opening and a fourth carrier gas pipeline opening. The third carrier gas pipeline opening may be fixedly connected to the first carrier gas connector 111. The fourth carrier gas pipeline opening may be fixedly connected to the second carrier gas connector 113. The first carrier gas connector 111 is connected to the carrier gas inlet connector 101 through the carrier gas pipeline inside the control block seat 105. The second carrier gas connector 113 is connected to the carrier gas outlet connector 107 through the carrier gas pipeline inside the control block seat 105. In other embodiments, the third carrier gas pipeline opening and the fourth carrier gas pipeline opening may also be located elsewhere in the control block seat 105 according to the different structures of the bypass valve and the anesthesia machine.

[0086] The side of the control block seat 105 may also have a second driving gas pipeline opening, which can be connected to the first two-position three-way normally closed solenoid valve 102-1, the second two-position three-way normally closed solenoid valve 102-2 and the two-position three-way normally open solenoid valve 103 through the driving gas pipeline inside the control block seat 105, and is used to discharge the waste gas generated by the solenoid valve out of the control block seat 105. In other embodiments, the second driving gas pipeline opening may also be located at other places of the control block seat 105 according to the different structures of the bypass valve and the anesthesia machine.

[0087] The front of the control block seat 105 can also be fixedly connected to two support seats 112. The support seats 112 can detachably connect the control block seat 105 to the carrier gas diversion block 200. One end of the support seat 112 is detachably connected to the front of the control block seat 105 using a thread, and the other end is detachably connected to the carrier gas diversion block 200 using a screw. In other embodiments, the control block seat 105 and the carrier gas diversion block 200 can also be fixed in other ways that are easy to connect and separate, such as snap-fit, hanging, etc.

[0088] like Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, the main body of the carrier gas flow splitter block 200 is a gas flow channel seat 204. The gas flow channel seat 204 may have 6 through holes, wherein the first through hole 211 may be fixedly connected to the first inlet front joint 202-1 at the front of the gas flow channel seat 204, the second through hole 212 may be fixedly connected to the first outlet front joint 201-1 at the front of the gas flow channel seat 204, the third through hole 213 may be fixedly connected to the second inlet front joint 202-2 at the front of the gas flow channel seat 204, the fourth through hole 214 may be fixedly connected to the second outlet front joint 201-2 at the front of the gas flow channel seat 204, and the fifth through hole 215 and the sixth through hole 216 may be connected by a bridge joint 203 at the front of the carrier gas flow splitter block 200. The fifth through hole 215 may be fixedly connected to the first rear joint 205 at the back of the gas flow channel seat 204. The gas flow channel seat 204 may also have a gas port 217 that is only open at the back. The air port 217 can be fixedly connected to the second rear joint 207 on the back of the air flow channel seat 204. When the switching valve control block 100 and the carrier gas diversion block 200 are fixedly connected, the positions of the first through hole 211 and the second through hole 212 correspond to the positions of the two pneumatic piston assemblies connected to the first two-position three-way normally closed solenoid valve 102-1; the positions of the third through hole 213 and the fourth through hole 214 correspond to the positions of the two pneumatic piston assemblies connected to the second two-position three-way normally closed solenoid valve 102-2; the position of the sixth through hole 216 corresponds to the position of the pneumatic piston assembly connected to the two-position three-way normally open solenoid valve 103; the position of the fifth through hole 215 corresponds to the position of the first carrier gas joint 111, and the first rear joint 205 can be sealed and connected to the first carrier gas joint 111; the position of the air port 217 corresponds to the position of the second carrier gas joint 113, and the second rear joint 207 can be sealed and connected to the second carrier gas joint 113.

[0089] The first through hole 211 can be communicated with the second through hole 212 and the fifth through hole 215 through a pipe inside the carrier gas splitter block 200. The gas port 217 can be communicated with the second through hole 212, the fourth through hole 214 and the sixth through hole 216 through a pipe inside the carrier gas splitter block 200. The third through hole 213 can be communicated with the fourth through hole 214 and the fifth through hole 215 through a pipe inside the carrier gas splitter block 200. The fifth through hole 215 can also be communicated with the sixth through hole 216 through a pipe inside the carrier gas splitter block 200. When in use, the first inlet front joint 202-1 and the first outlet front joint 201-1 can be respectively communicated with the inlet and outlet of a vaporizer, and the second inlet front joint 202-2 and the second outlet front joint 201-2 can be respectively communicated with the inlet and outlet of a vaporizer.

[0090] The first through hole 211, the second through hole 212, the third through hole 213, the fourth through hole 214 and the sixth through hole 216 can accommodate the sealing valve 210 on the back side of the air flow channel seat 204. The sealing valve 210 may include a flexible disc-shaped sealing sleeve 206. The sealing sleeve 206 is interference-fitted with the inner wall of the through hole where it is located to seal the through hole. The center of one end face of the sealing sleeve 206 is fixedly connected to an end of a cylindrical valve shaft 208. The other end of the valve shaft 208 may have a button-shaped sleeve joint 209. When the sealing valve 210 is placed in the through hole, the sleeve joint 209 is located outside the through hole.

[0091] In other embodiments, the number of through holes penetrating the airflow channel seat 204 may be increased in units of two. For each additional vaporizer mounted on the anesthesia machine, two through holes need to be added to the airflow channel seat 204. The two additional through holes may have the following configurations:

[0092] 1) can be fixedly connected to an inlet front connector and an outlet front connector respectively;

[0093] 2) can be connected through the pipeline inside the airflow channel seat 204;

[0094] 3) The through hole connected to the inlet front joint can be connected to the fifth through hole 215, and the through hole connected to the outlet front joint can be connected to the gas port 217;

[0095] 4) A sealing valve 210 can be accommodated on the back side of the airflow channel seat 204;

[0096] 5) The sealing valve 210 needs to be connected with the corresponding pneumatic piston assembly on the switching valve control block 100 and controlled by a two-position, three-position normally closed solenoid valve.

[0097] When the switching valve control block 100 and the carrier gas diversion block 200 are connected, first, the six sealing valves 210 are placed in the first through hole 211, the second through hole 212, the third through hole 213, the fourth through hole 214 and the sixth through hole 216; then the sleeve joint 209 of each sealing valve 210 is sleeved from top to bottom into the groove 120 of the valve head 119 of the valve core 110 of the corresponding pneumatic piston assembly, so that the valve core 110 and the sealing valve 210 are connected together and can reciprocate together along the axial direction of the valve hole 116; finally, the switching valve control block 100 and the carrier gas diversion block 200 are fixed together using screws through the support seat 112.

[0098] The quick connection method of the switching valve control block 100 and the carrier gas diversion block 200 solves the defect that the mechanical evaporator cannot completely disinfect bacteria, and simplifies the steps for users to disassemble and install the bypass valve.

[0099] like Fig.11 and Fig.12As shown, after the switching valve control block 100 and the carrier gas diversion block 200 are connected, the channel through which the carrier gas flows in the electric bypass valve can be controlled by controlling whether the first two-position three-way normally closed solenoid valve 102-1, the second two-position three-way normally closed solenoid valve 102-2 and the two-position three-way normally open solenoid valve 103 are energized.

[0100] When the first two-position three-way normally closed solenoid valve 102-1 and the second two-position three-way normally closed solenoid valve 102-2 are not energized, and the two-position three-way normally open solenoid valve 103 is also not energized, the flow channel of the carrier gas is: carrier gas inlet connector 101→first carrier gas pipeline opening→third carrier gas pipeline opening→first carrier gas connector 111→first rear connector 205→fifth through hole 215→bridge connector 203→sixth through hole 216→gas port 217→second rear connector 207→second carrier gas connector 113→second carrier gas pipeline opening→carrier gas outlet connector 107. At this time, the vaporizer 1 and the vaporizer 2 are not used, and the carrier gas is directly connected to the ACGO module and the breathing circuit in the anesthesia machine after passing through the electrically controlled bypass valve, which is suitable for the anesthesia machine that does not use the vaporizer and only serves as an auxiliary breathing function.

[0101] When the first two-position three-way normally closed solenoid valve 102-1 and the two-position three-way normally open solenoid valve 103 are energized, and the second two-position three-way normally closed solenoid valve 102-2 is not energized, the flow path of the carrier gas is: carrier gas inlet connector 101→first carrier gas pipeline opening→third carrier gas pipeline opening→first carrier gas connector 111→first rear connector 205→fifth through hole 215→first through hole 211→first inlet front connector 202-1→volatile tank 1→first outlet front connector 201-1→second through hole 212→gas port 217→second rear connector 207→second carrier gas connector 113→second carrier gas pipeline opening→carrier gas outlet connector 107. At this time, the vaporizer 1 is used, and the carrier gas passes through the vaporizer 1, and is connected to the ACGO module and the breathing circuit in the anesthesia machine after passing through the electrically controlled bypass valve together with the anesthetic gas.

[0102] When the second two-position three-way normally closed solenoid valve 102-2 and the two-position three-way normally open solenoid valve 103 are energized, and the first two-position three-way normally closed solenoid valve 102-1 is not energized, the flow path of the carrier gas is: carrier gas inlet connector 101→first carrier gas pipeline opening→third carrier gas pipeline opening→first carrier gas connector 111→first rear connector 205→fifth through hole 215→third through hole 213→second inlet front connector 202-2→volatile tank 2→second outlet front connector 201-2→fourth through hole 214→gas port 217→second rear connector 207→second carrier gas connector 113→second carrier gas pipeline opening→carrier gas outlet connector 107. At this time, the vaporizer 2 is used, and the carrier gas passes through the vaporizer 2, and is connected to the ACGO module and the breathing circuit in the anesthesia machine after passing through the electrically controlled bypass valve together with the anesthetic gas.

[0103] By default, the first two-position three-way normally closed solenoid valve 102-1, the second two-position three-way normally closed solenoid valve 102-2, and the two-position three-way normally open solenoid valve 103 are all not energized, and the vaporizer is not used at this time. When anesthetic gas is needed, the two-position three-way normally open solenoid valve 103 needs to be closed, and then the corresponding two-position three-way normally closed solenoid valve can be opened according to the vaporizer to be used. In order to solve the medical risks brought by the mixing of two types of anesthetic drugs, the electric-controlled bypass valve is also provided with an interlocking function of the two-position three-way normally closed solenoid valve, that is, only one two-position three-way normally closed solenoid valve can be opened at the same time, and the two-position three-way normally open solenoid valve 103 can be closed at the same time when the two-position three-way normally closed solenoid valve is opened.

[0104] When the concentration of the vaporizer is significantly reduced or there is no anesthetic concentration output during the use of the anesthesia machine, in order to enable users or after-sales maintenance personnel to visually determine the open and closed status of the vaporizer working channel, the front of the airflow channel seat 204 is made of transparent material, and the position status of the piston 106 installed on the back of the control block seat 105 can also be observed by the naked eye to quickly determine whether the abnormal fault is caused by an abnormality of the electric bypass valve, which greatly simplifies the fault diagnosis steps.

[0105] The present application also provides an anesthesia machine having the above-mentioned electrically controlled bypass valve.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present application does not depart from the spirit and scope of the technical solution of the present application and should be included in the scope of the claims of the present application.

Claims

1. An electrically controlled bypass valve, characterized in that: It includes a switching valve control block and a carrier gas splitter block; wherein, The switching valve control block comprises: A control block seat approximately in the shape of a rectangular parallelepiped, with a plurality of gas pipelines inside; A first carrier gas pipeline opening, a second carrier gas pipeline opening, a third carrier gas pipeline opening and a fourth carrier gas pipeline opening are located on the side of the control block seat; the first carrier gas pipeline opening is connected to the third carrier gas pipeline opening through the gas pipeline inside the control block seat; the second carrier gas pipeline opening is connected to the fourth carrier gas pipeline opening through the gas pipeline inside the control block seat; A first carrier gas connector, fixedly connected to the opening of the third carrier gas pipeline; A second carrier gas connector, fixedly connected to the opening of the fourth carrier gas pipeline; a first drive gas pipeline opening and a second drive gas pipeline opening located on the side of the control block seat; A two-position, three-position normally open solenoid valve fixed on the side of the control block seat; N two-position, three-position normally closed solenoid valves are fixed on the side of the control block seat; The first driving gas pipeline opening is connected to the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve through the gas pipeline inside the control block seat, and is used to provide driving gas for the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve; The second driving gas pipeline opening is connected to the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve through the gas pipeline inside the control block seat, and is used to discharge the waste gas generated by the two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve; and 2N+1 pneumatic piston assemblies, each pneumatic piston assembly includes: a valve hole, a valve core, a piston and a spring; wherein, The piston is a cylindrical structure; the valve core body is cylindrical; one end of the valve core body is a cylindrical valve head with a diameter thicker than the body, and the other end is fixedly connected to the middle of one end face of the piston; the diameter of the piston is larger than the diameter of the valve core body; the valve hole runs through the front and back of the control block seat, and is a spindle-shaped hole with a small middle and large sides; the valve hole accommodates the valve core and the piston, and the valve core is located on the front of the control block seat; the spring is sleeved on the valve core body, and one end is fitted with the valve head; the outer diameter of the spring is smaller than the outer diameter of the valve head and larger than the middle diameter of the valve hole; when the spring is in an open state, there is a gap between the end face of the piston and the bottom of the thicker diameter part of the valve hole near the back of the control block seat; the gap is connected to one of the two-position three-way normally closed solenoid valve or the two-position three-way normally open solenoid valve through the gas pipeline; The pneumatic piston assembly has a ventilated state and a non-ventilated state; The two-position three-position normally open solenoid valve is connected to the gap of one of the pneumatic piston assemblies through a gas pipeline inside the control block seat; One of the two-position, three-position normally closed solenoid valves is connected to the gaps between the two pneumatic piston assemblies through a gas pipeline inside the control block seat; The carrier gas splitter block is detachably connected to the front side of the control block seat, comprising: An air flow channel seat, which has a plurality of gas pipelines inside; 1 gas port on the back side of the carrier gas splitter block, sealed and connected to the second carrier gas connector; The fifth through hole, the sixth through hole and the 2N through holes connected to the volatilizer all pass through the airflow channel seat; wherein, The fifth through hole is sealedly connected to the first carrier gas connector; the 2N through holes connected to the volatilizer are divided into N pairs, each pair includes 2 through holes connected to the volatilizer; each pair of through holes connected to the volatilizer is connected through the gas pipeline of the gas flow channel seat; in each pair of through holes connected to the volatilizer, one is connected to the gas pipeline of the gas flow channel seat through the fifth through hole, and the other through hole is connected to the gas port through the gas pipeline of the gas flow channel seat; the sixth through hole is connected to the gas port through the gas pipeline of the gas flow channel seat; A bridge joint located on the front side of the airflow channel seat, connecting the fifth through hole and the sixth through hole; and 2N+1 sealing valves; each of the sealing valves comprises: a sealing sleeve and a valve shaft; wherein, The sealing sleeve is in the shape of a flexible disc; the valve shaft is in the shape of a column; the center of one end surface of the sealing sleeve is fixedly connected to one end of the valve shaft; The 2N+1 sealing valves are inserted into the sixth through hole and the 2N through holes connected to the vaporizer from the back of the airflow channel seat in a manner that the valve shaft is outward; the sealing sleeve is interference-fitted with the inner wall of the through hole; One end of the valve shaft of the sealing valve in the fifth through hole away from the sealing valve is detachably connected to the valve head of the pneumatic piston assembly of the control block seat that is in communication with the two-position three-position normally open solenoid valve; In N pairs of through holes connected to the vaporizer, one end of the valve shaft of the sealing valve in each pair of through holes connected to the vaporizer away from the sealing valve is detachably connected to the valve heads of the two pneumatic piston assemblies of the control block seat that are connected to the two-position three-way normally closed solenoid valve.

2. The electrically controlled bypass valve according to claim 1, characterized in that: The other end of the valve shaft away from the sealing sleeve has a button-shaped sleeve joint; The valve head of the valve core has a groove on the outer end surface; When the switching valve control block and the carrier gas diversion block are connected, the sleeve joint is sleeved and fixed with the corresponding groove.

3. The electrically controlled bypass valve according to claim 1, characterized in that: The ventilation state of the pneumatic piston assembly is: the piston is close to the back side of the control block seat, the spring is in a compressed state, most of the valve head is located in the valve hole, and the through hole where the sealing valve is located allows the carrier gas to pass through; The airless state of the pneumatic piston assembly is: the piston is away from the back side of the control block seat, the spring is in an open state, most of the valve head is located outside the valve hole, and the sealing valve closes the through hole.

4. The electrically controlled bypass valve according to claim 1, characterized in that: The two-position three-way normally open solenoid valve and the two-position three-way normally closed solenoid valve are in a non-energized state by default.

5. The electrically controlled bypass valve according to claim 4, characterized in that: The two-position three-way normally open solenoid valve and the N two-position three-way normally closed solenoid valves have interlocking control; The interlock control includes: only one of the two-position three-position normally closed solenoid valve can be energized at the same time; when the two-position three-position normally closed solenoid valve is energized, the two-position three-position normally open solenoid valve is also energized.

6. The electrically controlled bypass valve according to claim 1, characterized in that: The front side of the airflow channel seat is made of transparent material.

7. The electrically controlled bypass valve according to claim 1, characterized in that: The pneumatic piston assembly also includes a first annular sealing ring and a second annular sealing ring; A first annular groove is provided in the middle of the valve core body; the first annular sealing ring is sleeved in the first annular groove and has an interference fit with the inner wall of the valve hole; a second annular groove is provided on the cylindrical side of the piston; the second annular sealing ring is sleeved in the second annular groove and has an interference fit with the inner wall of the valve hole.

8. The electrically controlled bypass valve according to claim 1, characterized in that: The switching valve control block also includes: a carrier gas inlet connector, detachably connected to the first carrier gas pipeline opening; a carrier gas outlet connector detachably connected to the second carrier gas conduit opening; and A driving gas inlet connector is detachably connected to the first driving gas pipeline opening.

9. The electrically controlled bypass valve according to claim 1, characterized in that: The N is an integer greater than or equal to 2.

10. An anesthesia machine, characterized in that: An electrically controlled bypass valve as claimed in any one of claims 1 to 9.

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