Anesthetic gas control system and anesthesia equipment

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to an anesthetic gas control system and anesthetic equipment. The anesthetic gas control system comprises a volatilization tank and a gas supply and delivery gas circuit, wherein the gas supply and delivery gas circuit comprises a driving gas delivery gas circuit; an anesthetic chamber, a mixing chamber and an anesthetic output pipeline are arranged in the volatilization tank, and the anesthetic chamber is provided with a driving gas inlet and an anesthetic gas outlet; one end of the anesthetic output pipeline is connected with the anesthetic gas outlet, and the other end is connected with a nozzle control valve; the mixing chamber is provided with an anesthetic gas inlet and a mixed gas outlet, a counter is installed at the anesthetic gas inlet, and anesthetic gas in the anesthetic output pipeline can be sprayed into the anesthetic gas inlet when the nozzle control valve is opened; the counter is used for detecting the number of anesthetic molecules in anesthetic gas per unit volume. The anesthetic concentration in the anesthetic gas is calculated by measuring the number of anesthetic molecules through the counter, the detection precision of the anesthetic concentration is improved, and therefore the control precision of the anesthetic concentration is improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to an anesthetic gas control system and anesthesia equipment. Background Technology

[0002] Anesthesia equipment generally includes a gas supply and delivery system for providing oxygen and carrier gas, and a vaporizer connected to the gas supply and delivery system. The vaporizer converts volatile liquid anesthetic drugs into vaporized gas. A certain amount of carrier gas is introduced into the vaporizer to carry away the vaporized gas, resulting in an anesthetic gas with a specific concentration of anesthetic drug. This anesthetic gas, along with oxygen, enters the anesthesia circuit for patient anesthesia. The anesthetic gas vaporization system is used to control the concentration of the anesthetic gas, which directly affects the anesthetic effect on the patient and the success or failure of surgical procedures.

[0003] In existing anesthesia equipment, an in-tank flow sensor and an in-tank pressure sensor are installed at the inlet of the vaporizer, and an external flow sensor and an external pressure sensor are installed at the outlet of the vaporizer. The in-tank flow sensor and the internal pressure sensor are used to monitor the flow rate and pressure of the carrier gas, while the external flow sensor and the external pressure sensor are used to monitor the flow rate and pressure of the anesthetic gas, thereby calculating the concentration of the anesthetic gas. The microcontroller compares the actual concentration of the anesthetic gas with the set value and controls the vaporizer and regulates the gas supply and delivery system so that the concentration of the anesthetic gas is always kept within the error range of the set value.

[0004] However, the aforementioned anesthesia equipment has poor precision control over the concentration of anesthetic gases. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: to provide an anesthetic gas control system and an anesthetic device, addressing the issue of poor precision control of anesthetic gas concentration in existing anesthesia equipment.

[0006] To solve the above-mentioned technical problems, on the one hand, the present invention provides an anesthetic gas control system, including a vaporizer and a gas supply and delivery circuit, wherein the gas supply and delivery circuit includes a driving gas delivery circuit;

[0007] The vaporizer is equipped with an anesthetic chamber, a mixing chamber, and an anesthetic output pipeline. The anesthetic chamber has a driving gas inlet and an anesthetic gas outlet. The anesthetic chamber is used to heat the liquid anesthetic to form anesthetic vapor. The driving gas delivery pipeline can deliver driving gas to the driving gas inlet. The driving gas can carry part of the anesthetic vapor and output it from the anesthetic gas outlet. One end of the anesthetic output pipeline is connected to the anesthetic gas outlet, and the other end is connected to a nozzle control valve.

[0008] The mixing chamber is provided with an anesthetic gas inlet and a mixed gas outlet. A counter is installed at the anesthetic gas inlet. The anesthetic gas in the anesthetic output pipeline can be injected into the anesthetic gas inlet when the nozzle control valve is opened. The counter is used to detect the number of anesthetic molecules in a unit volume of the anesthetic gas.

[0009] Optionally, the driving gas inlet is located at the top of the anesthetic chamber, the anesthetic gas inlet is located at the bottom of the mixing chamber, and the nozzle control valve is located directly below the anesthetic gas inlet.

[0010] Optionally, the nozzle of the nozzle control valve and the anesthetic gas outlet are located at the same height.

[0011] Optionally, a filter is connected to the anesthetic output line.

[0012] Optionally, the gas supply and delivery circuit further includes a fresh gas delivery circuit, and the mixing chamber is also provided with a fresh gas inlet. The fresh gas delivery circuit can deliver fresh gas to the fresh gas inlet, and then the fresh gas and the anesthetic gas are mixed in the mixing chamber and output from the mixed gas outlet.

[0013] Optionally, it also includes a pilot gas path, wherein a fresh gas switching valve is connected to the fresh gas delivery gas path. The fresh gas switching valve is a normally closed valve and has a control port. One end of the pilot gas path is connected to the inlet of the driving gas delivery gas path, and the other end is connected to the control port of the fresh gas switching valve.

[0014] A pilot switch valve is connected to the pilot gas line. When the pilot switch valve is open, the driving gas in the pilot gas line is introduced into the control port of the fresh gas switch valve, the fresh gas switch valve is opened, and the fresh gas delivery gas line is connected.

[0015] Optionally, it also includes a breathing airway, one end of which is connected to the mixed gas outlet, a mixed gas switching valve is connected to the breathing airway, the mixed gas switching valve is a normally closed valve, the mixed gas switching valve has a control port, and the other end of the pilot airway is also connected to the control port of the mixed gas switching valve.

[0016] When the pilot switch valve is opened, the driving gas in the pilot gas path is introduced into the control port of the mixed gas switch valve, the mixed gas switch valve is opened, and the breathing gas path is opened.

[0017] Optionally, there are two evaporation tanks, and two paths are provided for each of the driving gas delivery path, pilot gas path, breathing gas path and fresh gas delivery path, and the driving gas delivery path, evaporation tank, pilot gas path, breathing gas path and fresh gas delivery path correspond one-to-one;

[0018] Only one of the fresh gas switching valves on the two fresh gas delivery lines can be opened; only one of the driving gas switching valves on the two driving gas delivery lines can be opened.

[0019] Optionally, it also includes a first liquid level sensor and a second liquid level sensor, wherein the first liquid level sensor is installed on the top side of the anesthetic chamber and the second liquid level sensor is installed on the bottom side of the anesthetic chamber;

[0020] The first liquid level sensor and the second liquid level sensor are used to monitor the liquid anesthetic level in the anesthetic chamber.

[0021] On the other hand, this utility model provides an anesthesia device, including the aforementioned anesthetic gas control system.

[0022] The anesthetic gas control system of this invention calculates the anesthetic gas concentration by detecting the number of anesthetic molecules in a unit volume of anesthetic gas injected into the mixing chamber using a counter at the anesthetic gas inlet. Compared to existing technologies that calculate the anesthetic gas concentration by monitoring the flow rate and pressure at the inlet and outlet of the vaporizer, this invention improves the detection accuracy of the anesthetic concentration by measuring the number of anesthetic molecules, thereby enhancing the control accuracy of the anesthetic concentration. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an anesthetic gas control system provided in an embodiment of the present invention.

[0024] The reference numerals in the accompanying drawings are as follows:

[0025] 1. Evaporation tank; 11. Anesthetic chamber; 111. First liquid level sensor; 112. Second liquid level sensor; 12. Mixing chamber; 13. Anesthetic gas outlet; 14. Driving gas inlet; 15. Anesthetic gas inlet; 16. Anesthetic output pipeline; 17. Mixed gas outlet; 18. Fresh gas inlet; 19. Filter; 2. Driving gas delivery pipeline; 21. Driving gas switch valve; 22. Driving gas pressure regulating valve; 3. Fresh gas delivery pipeline; 31. Fresh gas switch valve; 4. Pilot gas pipeline; 41. Pilot switch valve; 42. Fresh gas switching valve; 5. Breathing pipeline; 51. Mixed gas switch valve; 6. Counter; 7. Pressure relief valve; 8. Nozzle control valve; 9. Anesthetic switch valve; 10. Fresh gas direct-flow valve. Detailed Implementation

[0026] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model 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 of the present utility model and are not intended to limit the present utility model.

[0027] like Figure 1 As shown, one embodiment of the present invention provides an anesthetic gas control system, including a vaporizer 1 and a gas supply and delivery path, the gas supply and delivery path including a driving gas delivery path 2.

[0028] The vaporizer 1 is equipped with an anesthetic chamber 11, a mixing chamber 12, and an anesthetic output pipeline 16. The anesthetic chamber 11 has a driving gas inlet 14 and an anesthetic gas outlet 13. The anesthetic chamber 11 is used to heat liquid anesthetic to form anesthetic vapor. The driving gas delivery pipeline 2 can supply driving gas to the driving gas inlet 14. The driving gas can carry part of the anesthetic vapor and output it from the anesthetic gas outlet 13 to form an anesthetic gas with a certain anesthetic concentration. One end of the anesthetic output pipeline 16 is connected to the anesthetic gas outlet 13, and the other end is connected to a nozzle control valve 8.

[0029] The mixing chamber 12 is provided with an anesthetic gas inlet 15 and a mixed gas outlet 17. A counter 6 is installed at the anesthetic gas inlet 15. The anesthetic gas in the anesthetic output pipeline 16 can be injected into the anesthetic gas inlet 15 when the nozzle control valve 8 is opened. The counter 6 is used to detect the number of anesthetic molecules in a unit volume of anesthetic gas.

[0030] Specifically, the anesthesia chamber 11 is equipped with a drug injection port and a heater. Liquid anesthetic is added into the anesthesia chamber 11 through the drug injection port. The heater heats the liquid anesthetic to form anesthetic vapor. The driving gas delivered by the driving gas delivery line 2 enters the anesthesia chamber 11 through the driving gas inlet 14. The driving gas carries some anesthetic vapor and outputs anesthetic gas with a certain concentration from the anesthetic gas outlet 13. The anesthetic gas is delivered through the anesthetic output pipeline 16 and sprayed into the anesthetic gas inlet 15 of the mixing chamber 12 through the nozzle control valve 8. The anesthetic gas enters the anesthesia circuit together with oxygen and other gases to anesthetize the patient.

[0031] The counter 6 installed at the anesthetic gas inlet 15 can detect the number of anesthetic molecules in a unit volume of anesthetic gas, and then calculate the anesthetic concentration in the anesthetic gas. The microcontroller of the anesthetic gas control system compares the detected anesthetic concentration with the set anesthetic concentration. When the detected anesthetic concentration exceeds the error range of the set anesthetic concentration, the microcontroller adjusts the valve size of the nozzle control valve 8 to adjust the flow rate of the anesthetic gas injected into the mixing chamber 12, thereby adjusting the anesthetic concentration in the gas delivered to the patient.

[0032] The driving gas is usually oxygen. Figure 1 In this context, B represents the inlet for the driving gas delivery gas.

[0033] The anesthetic gas control system of this invention calculates the anesthetic concentration by detecting the number of anesthetic molecules in a unit volume of anesthetic gas injected into the mixing chamber 12 using a counter 6 at the anesthetic gas inlet 15. Compared to the prior art, which calculates the anesthetic concentration by monitoring the flow rate and pressure at the inlet and outlet of the evaporator 1, this invention improves the detection accuracy of the anesthetic concentration by measuring the number of anesthetic molecules using the counter 6, thereby improving the control accuracy of the anesthetic concentration.

[0034] In one embodiment, counter 6 is an infrared counter. Infrared counters are mature products and are devices that use infrared technology for counting. Their principle is to use an infrared sensor to detect the passage of objects and then count the data through a counting circuit.

[0035] Infrared counters are divided into through-beam and reflective types. Through-beam infrared counters include a transmitter and a receiver positioned opposite each other. The transmitter emits infrared light into the receiver. When an object passes between the transmitter and receiver, it blocks the light and outputs a pulse signal to trigger the counting circuit. Reflective infrared counters integrate the transmitter and receiver into one infrared probe. When an object appears in front of the infrared probe, it reflects the infrared light from the transmitter back to the receiver. The infrared probe then outputs a pulse to the counting circuit for counting.

[0036] In other embodiments, counter 6 may be an ultrasonic counter.

[0037] In one embodiment, the driving gas inlet 14 is located at the top of the anesthetic chamber 11, the anesthetic gas outlet 13 is located at the bottom of the anesthetic chamber 11, the anesthetic gas inlet 15 is located at the bottom of the mixing chamber 12, and the nozzle control valve 8 is located directly below the anesthetic gas inlet 15.

[0038] The anesthetic gas outlet 13 is located below the driving gas inlet 14, that is, below the flow direction of the driving gas, which facilitates the driving gas flowing in from the top of the anesthetic chamber 11 carrying anesthetic vapor and flowing out from the anesthetic gas outlet 13.

[0039] Furthermore, since the anesthetic gas inlet 15 is located at the bottom of the mixing chamber 12 and the anesthetic gas outlet 13 is located at the bottom of the anesthetic chamber 11, the anesthetic chamber 11 and the mixing chamber 12 can be arranged side by side, and the anesthetic output pipeline 16 can be located at the bottom of the anesthetic chamber 11 and the mixing chamber 12, simplifying the arrangement of the anesthetic output pipeline 16.

[0040] In one embodiment, the nozzle of the nozzle control valve 8 and the anesthetic gas outlet 13 are located at the same height.

[0041] In one embodiment, a filter 19 is connected to the anesthetic output line 16 to filter impurities in the anesthetic gas and prevent impurities from clogging the nozzle control valve 8.

[0042] In one embodiment, the gas supply and delivery path also includes a fresh gas delivery path 3, and the mixing chamber 12 is also provided with a fresh gas inlet 18. The fresh gas delivery path 3 can deliver fresh gas to the fresh gas inlet 18, and then the fresh gas and anesthetic gas are mixed in the mixing chamber 12 and output from the mixed gas outlet 17. Figure 1 In this context, A represents the inlet for fresh gas.

[0043] In one embodiment, the fresh gas may be a mixture of nitrous oxide, oxygen and air, or a mixture of two of these gases, or one of these gases.

[0044] In one embodiment, a pilot gas path 4 is also included. A fresh gas switching valve 31 is connected to the fresh gas delivery gas path 3. The fresh gas switching valve 31 is a normally closed valve and has a control port. One end of the pilot gas path 4 is connected to the inlet of the driving gas delivery gas path 2, and the other end is connected to the control port of the fresh gas switching valve 31.

[0045] A pilot switch valve 41 is connected to the pilot gas path 4. When the pilot switch valve 41 is opened, the driving gas in the pilot gas path 4 is introduced into the control port of the fresh gas switch valve 31, the fresh gas switch valve 31 is opened, and the fresh gas delivery gas path 3 is connected.

[0046] When the pilot switch valve 41 is opened, driving gas is introduced into the inlet of the driving gas delivery passage 2. Part of the driving gas flows into the pilot gas passage 4 and flows to the control port of the fresh gas switch valve 31 to push the valve core of the fresh gas switch valve 31 to move, so that the inlet and outlet of the fresh gas switch valve 31 are connected and the fresh gas delivery passage is opened. The fresh gas delivery passage 3 is opened automatically by the driving gas, so that when the driving gas delivery passage 2 delivers driving gas to the anesthetic chamber 11, the fresh gas delivery passage 3 can simultaneously deliver fresh gas to the mixing chamber 12, which is conducive to the anesthetic gas and fresh gas mixing in the mixing chamber 12 as soon as possible and outputting to the patient.

[0047] In one embodiment, the pilot switch valve 41 is a normally closed two-position three-way valve with an air inlet, an air outlet and an exhaust port. The air inlet of the pilot switch valve 41 is connected to the inlet of the driving gas delivery circuit 2, and the air outlet is connected to the control port of the fresh gas switch valve 31. When the pilot switch valve 41 is energized, the air inlet and the air outlet are connected.

[0048] In one embodiment, a breathing airway 5 is also included. One end of the breathing airway 5 is connected to the mixed gas outlet 17. A mixed gas switching valve 51 is connected to the breathing airway 5. The mixed gas switching valve 51 is a normally closed valve and has a control port. The other end of the pilot airway 4 is also connected to the control port of the mixed gas switching valve 51. Figure 1 In this context, C represents the outlet of respiratory airway 5.

[0049] When the pilot switch valve 41 is opened, the driving gas in the pilot gas path 4 is introduced into the control port of the mixed gas switch valve 51, the mixed gas switch valve 51 is opened, and the breathing gas path 5 is opened.

[0050] The driving gas in the pilot gas path 4 is split into two paths after passing through the pilot switch valve 41. One path flows to the control port of the fresh gas switch valve 31, controlling the fresh gas switch valve 31 to open. The other path flows to the control port of the mixed gas switch valve 51, controlling the mixed gas switch valve 51 to open. This ensures that the respiratory gas path 5 is simultaneously activated when the fresh gas delivery path begins to deliver fresh gas into the anesthesia room 11, so that the respiratory gas path 5 can deliver the mixed gas to the patient in a timely manner.

[0051] In one embodiment, there are two evaporation tanks 1, and two paths are provided for each of the driving gas delivery path 2, pilot gas path 4, breathing gas path 5 and fresh gas delivery path 3. The driving gas delivery path 2, evaporation tank 1, pilot gas path 4, breathing gas path 5 and fresh gas delivery path 3 correspond one-to-one.

[0052] in, Figure 1 B1 and B2 in the text represent two pilot gas paths 4. Figure 1 B3 in the diagram indicates that the pilot switch valve 41 of one of the pilot air paths 4 (B1) is connected to the control port of the mixing switch valve 51 on one of the breathing air paths 5. Figure 1 The pilot switch valve 41 of another pilot air path 4 (B4) is connected to the control port of the mixed gas switch valve 51 on another breathing air path 5.

[0053] Only one of the fresh gas switching valves 31 on the two fresh gas delivery lines 3 can be opened, and only one of the driving gas switching valves 21 on the two driving gas delivery lines 2 can be opened. The two vaporizers 1 cannot work at the same time. If one vaporizer 1 fails, the other can still serve as a safety backup, thereby improving the safety and reliability of the anesthetic gas control system.

[0054] In one embodiment, a first liquid level sensor 111 and a second liquid level sensor 112 are also included. The first liquid level sensor 111 is installed on the top side inside the anesthetic chamber 11, and the second liquid level sensor 112 is installed on the bottom side inside the anesthetic chamber 11.

[0055] The first liquid level sensor 111 and the second liquid level sensor 112 are used to monitor the liquid level of the anesthetic in the anesthetic chamber 11.

[0056] In one embodiment, a pressure relief valve 7, a pressure sensor, and an anesthetic switch valve 9 are sequentially connected downstream of the driving gas supply line 2 and the driving gas switch valve 21. The pressure relief port of the pressure relief valve 7 is connected to the driving gas output pipeline. When the pressure of the driving gas exceeds the safety pressure of the pressure relief valve 7, part of the gas is discharged through the driving gas output pipeline. The pressure of the subsequent driving gas is monitored by the pressure sensor. The anesthetic switch valve 9 is used to control whether the driving gas enters the anesthetic chamber 11. The anesthetic switch valve 9 is a normally closed valve.

[0057] In one embodiment, the drive gas output line is connected to a one-way valve so that the drive gas output line can only output depressurized gas.

[0058] In one embodiment, the two breathing airways 5 share a single outlet, which is connected to the breathing circuit on the ventilator.

[0059] In one embodiment, a driving gas pressure regulating valve 22 is also included. The driving gas introduced into the inlet of the driving gas delivery gas path 2 is regulated by the driving gas pressure regulating valve 22 to output gas with a stable pressure, and then splits into two paths, which flow to the two volatilization tanks 1 respectively.

[0060] In one embodiment, the fresh gas is divided into two paths: the first path flows to the fresh gas delivery path 3, and the second path flows to the outlet of the breathing path 5. A fresh gas direct-flow valve 10 is connected to the second path. A fresh gas switching valve 42 is connected to a pilot path 4. The fresh gas switching valve 42 is a normally closed valve, and its outlet is connected to the control port of the fresh gas direct-flow valve 10. When the fresh gas switching valve 42 is opened, the driving gas passes through the fresh gas switching valve 42 into the control port of the fresh gas direct-flow valve 10, causing the fresh gas direct-flow valve 10 to close. The second path of fresh gas stops being delivered to the outlet of the breathing path 5. At this time, the first path of fresh gas can be delivered to the mixing chamber 12 through the fresh gas delivery path 3.

[0061] In addition, one embodiment of this utility model provides an anesthesia device, including the anesthetic gas control system of any of the above embodiments.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anesthetic gas control system characterized by, The volatile tank (1) and a gas supply delivery gas path, the gas supply delivery gas path includes a driving gas delivery gas path (2); The volatile tank (1) is provided with a narcotic chamber (11), a mixing chamber (12) and a narcotic output pipeline (16), the narcotic chamber (11) is provided with a driving gas inlet (14) and a narcotic gas outlet (13), the narcotic chamber (11) is used for heating liquid narcotic to form narcotic vapor, the driving gas delivery gas path (2) can deliver driving gas to the driving gas inlet (14), the driving gas can carry part of the narcotic vapor to output from the narcotic gas outlet (13); one end of the narcotic output pipeline (16) is connected with the narcotic gas outlet (13), and the other end is connected with a nozzle control valve (8); The mixing chamber (12) is provided with a narcotic gas inlet (15) and a mixed gas outlet (17), a counter (6) is installed at the narcotic gas inlet (15), and the narcotic gas in the narcotic output pipeline (16) can be sprayed into the narcotic gas inlet (15) when the nozzle control valve (8) is opened; the counter (6) is used for detecting the number of narcotic molecules in unit volume of the narcotic gas.

2. The anesthetic gas control system of claim 1, wherein, The driving gas inlet (14) is arranged at the top of the narcotic chamber (11), the narcotic gas inlet (15) is arranged at the bottom of the mixing chamber (12), and the nozzle control valve (8) is located directly below the narcotic gas inlet (15).

3. The anesthetic gas control system of claim 2, wherein, The nozzle of the nozzle control valve (8) and the narcotic gas outlet (13) are located at the same height.

4. The anesthetic gas control system of claim 1, wherein, A filter (19) is connected to the narcotic output pipeline (16).

5. The anesthetic gas control system of claim 1, wherein, The gas supply delivery gas path further includes a fresh gas delivery gas path (3), the mixing chamber (12) is further provided with a fresh gas inlet (18), the fresh gas delivery gas path (3) can deliver fresh gas to the fresh gas inlet (18), and then the fresh gas is mixed with the narcotic gas in the mixing chamber (12) and then output from the mixed gas outlet (17).

6. The anesthetic gas control system of claim 5, wherein, Further comprising a pilot gas path (4), a fresh gas on-off valve (31) is connected to the fresh gas delivery gas path (3), the fresh gas on-off valve (31) is a normally closed valve, the fresh gas on-off valve (31) has a control port, one end of the pilot gas path (4) is in communication with the inlet of the driving gas delivery gas path (2), and the other end is connected to the control port of the fresh gas on-off valve (31); A pilot on-off valve (41) is connected to the pilot gas path (4), when the pilot on-off valve (41) is opened, the driving gas in the pilot gas path (4) flows into the control port of the fresh gas on-off valve (31), the fresh gas on-off valve (31) is opened, and the fresh gas delivery gas path (3) is conducted.

7. The anesthetic gas control system of claim 6, wherein, Further comprising a breathing gas path (5), one end of the breathing gas path (5) is connected to the mixed gas outlet (17), a mixed gas on-off valve (51) is connected to the breathing gas path (5), the mixed gas on-off valve (51) is a normally closed valve, the mixed gas on-off valve (51) has a control port, and the other end of the pilot gas path (4) is also connected to the control port of the mixed gas on-off valve (51); Further comprising a breathing gas path (5), one end of the breathing gas path (5) is connected to the mixed gas outlet (17), a mixed gas on-off valve (51) is connected to the breathing gas path (5), the mixed gas on-off valve (51) is a normally closed valve, the mixed gas on-off valve (51) has a control port, and the other end of the pilot gas path (4) is also connected to the control port of the mixed gas on-off valve (51); When the pilot switch valve (41) is opened, the driving gas in the pilot gas path (4) is introduced into the control port of the mixed gas switch valve (51), the mixed gas switch valve (51) is opened, and the breathing gas path (5) is conducted.

8. The anesthetic gas control system of claim 7, wherein, The volatile tank (1) is provided with two, the driving gas delivery gas path (2), the pilot gas path (4), the breathing gas path (5) and the fresh gas delivery gas path (3) are provided with two, the driving gas delivery gas path (2), the volatile tank (1), the pilot gas path (4), the breathing gas path (5) and the fresh gas delivery gas path (3) are one-to-one corresponding; The fresh gas switch valve (31) on the two fresh gas delivery gas paths (3) can only select one to open; the driving gas switch valve (21) on the two driving gas delivery gas paths (2) can only select one to open.

9. The anesthetic gas control system of any one of claims 1 to 8, wherein, It also includes a first liquid level sensor (111) and a second liquid level sensor (112), the first liquid level sensor (111) is installed on the top side in the narcotic chamber (11), the second liquid level sensor (112) is installed on the bottom side in the narcotic chamber (11); The first liquid level sensor (111) and the second liquid level sensor (112) are used to monitor the liquid level of the liquid narcotic in the narcotic chamber (11).

10. An anaesthesia apparatus characterized by The anesthetic gas control system of any one of claims 1 to 9.

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