Anesthesia evaporator and anesthesia machine

Abstract

The utility model provides an anesthetic evaporator and an anesthesia machine. The anesthetic evaporator comprises a medicine pool, an anesthetic gas circuit, a carrier gas circuit, a differential pressure sensor, an electromagnetic valve and a zero calibration valve. One end of the anesthesia gas circuit is communicated with the medicine pool; the tail end of the carrier gas path is communicated with the tail end of the anesthesia gas path; the differential pressure sensor is provided with at least two sampling ends, the sampling ends comprise an anesthetic gas sampling end and a carrier gas sampling end, the anesthetic gas sampling end is communicated with the anesthetic gas path through an anesthetic gas sampling branch, and the carrier gas sampling end is communicated with the carrier gas path through a carrier gas sampling branch; the electromagnetic valve is arranged on the anesthetic gas sampling branch and / or the carrier gas sampling branch; and the zero calibration valve is connected in parallel with the differential pressure sensor and is arranged between the anesthetic gas sampling branch and the carrier gas sampling branch. By controlling the communication or closing state of the zero calibration valve or the electromagnetic valve, the pressure at the two ends of the differential pressure sensor is equal, zero calibration is achieved, anesthetic gas does not need to be discharged into the atmosphere, and environmental safety of an operating room and health of workers are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an anesthesia vaporizer and an anesthesia machine. Background Art

[0002] The anesthesia vaporizer is an important component of the anesthesia machine. Its principle is to utilize changes in ambient temperature and heat sources to heat the liquid anesthetic into vaporized gas. A certain amount of anesthetic vapor is mixed with a carrier gas (such as fresh air) to form an anesthetic gas flow with a certain concentration, which enters the breathing circuit.

[0003] Currently known liquid anesthetics include isoflurane, sevoflurane, and desflurane. Desflurane has a boiling point of 22.8°C and a vapor pressure of 669 mmHg at 20°C, close to atmospheric pressure, and boils at room temperature. Conventional mechanical vaporizers are insufficient to continuously provide the heat required for desflurane vaporization, making it impossible to safely control desflurane delivery. Therefore, conventional mechanical vaporizers cannot be used to control desflurane delivery concentration.

[0004] In related technologies, the pressure balance at both ends of the differential pressure sensor is controlled by driving a proportional valve or a solenoid valve to achieve the desired anesthetic concentration. The calibration of the differential pressure sensor directly affects the accuracy of the anesthetic output by the anesthesia vaporizer. However, the existing structure will discharge anesthetic gas into the atmosphere during pressure calibration, which is not conducive to the environmental safety of the operating room and the health of the staff. Utility Model Content

[0005] The purpose of the present utility model is to overcome at least one of the deficiencies of the above-mentioned related technologies and to provide an anesthesia vaporizer and an anesthesia machine.

[0006] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present invention.

[0007] According to one aspect of the present invention, an anesthetic vaporizer is provided, comprising:

[0008] Medicine pool, used to produce anesthetic gas;

[0009] an anesthetic gas circuit, one end of which is connected to the drug pool;

[0010] a carrier gas circuit, wherein an end of the carrier gas circuit is connected to an end of the anesthesia gas circuit;

[0011] A differential pressure sensor having at least two sampling ends, the sampling ends including an anesthetic gas sampling end and a carrier gas sampling end, the anesthetic gas sampling end being connected to the anesthetic gas circuit via an anesthetic gas sampling branch, and the carrier gas sampling end being connected to the carrier gas circuit via a carrier gas sampling branch;

[0012] a solenoid valve, provided on the anesthetic gas sampling branch and / or the carrier gas sampling branch, for connecting or closing the anesthetic gas sampling branch and / or the carrier gas sampling branch;

[0013] a zero calibration valve, connected in parallel with the differential pressure sensor and arranged between the anesthetic gas sampling branch and the carrier gas sampling branch;

[0014] The pressures at both ends of the differential pressure sensor are made equal by controlling the connection or closing state of the solenoid valve and / or the zero calibration valve, thereby achieving zero calibration.

[0015] In an exemplary embodiment of the present invention, the anesthetic vaporizer further comprises:

[0016] The control center is electrically connected to the solenoid valve and the zeroing valve, and is used to control the opening or closing state of the solenoid valve and the zeroing valve.

[0017] In an exemplary embodiment of the present invention, the anesthetic vaporizer further comprises:

[0018] A heating component is connected to the medicine pool and is used to heat the medicine pool and generate anesthetic gas.

[0019] In an exemplary embodiment of the present invention, the anesthetic vaporizer further comprises:

[0020] A safety valve is provided on the anesthesia gas circuit and is electrically connected to the control center. The safety valve is used to control the opening or closing of the anesthesia gas circuit.

[0021] In an exemplary embodiment of the present invention, the anesthetic vaporizer further comprises:

[0022] A proportional valve is provided on the anesthesia gas circuit and is electrically connected to the control center. The proportional valve is used to control the flow of the anesthetic gas in the anesthesia gas circuit.

[0023] In an exemplary embodiment of the present invention, the anesthetic vaporizer further comprises:

[0024] Handwheel;

[0025] a cone valve, provided on the anesthetic gas circuit, wherein the cone valve is located between a connection point between the anesthetic gas sampling branch and the anesthetic gas circuit, and a connection point between the anesthetic gas circuit and the carrier gas circuit;

[0026] The hand wheel cooperates with the cone valve to control the output of anesthetic gas of a set concentration.

[0027] In an exemplary embodiment of the present invention, the handwheel includes a zero position and a non-zero position. When the handwheel switches from the zero position to the non-zero position, the control center controls the solenoid valve and / or the zeroing valve to switch between an open and a closed state.

[0028] In an exemplary embodiment of the present invention, the anesthetic vaporizer further comprises:

[0029] The gas resistance element is provided on the carrier gas path, and the gas resistance element is located between the connection point between the carrier gas sampling branch and the carrier gas path and the connection point between the carrier gas path and the anesthesia gas path.

[0030] In an exemplary embodiment of the present invention, when the pressure at both ends of the pressure differential sensor is controlled to be equal by controlling the solenoid valve, the solenoid valve is a two-position three-way valve, the solenoid valve is located on the anesthetic gas sampling branch, and the carrier gas sampling branch is connected to the solenoid valve, or

[0031] The solenoid valve is located on the carrier gas sampling branch, and the anesthetic gas sampling branch is communicated with the solenoid valve.

[0032] According to another aspect of the present invention, an anesthesia machine is also proposed, comprising an anesthesia machine main unit and the above-mentioned anesthesia vaporizer, wherein the anesthesia machine main unit comprises an air supply system, the anesthesia vaporizer is arranged on the anesthesia machine main unit, and the air supply system is connected to the anesthesia vaporizer so that the anesthesia vaporizer can provide anesthetic gas to the patient through a breathing circuit.

[0033] The utility model provides an anesthesia vaporizer and anesthesia machine with the following beneficial effects:

[0034] In the anesthetic vaporizer of the present invention, anesthetic gas generated by the drug reservoir can be mixed with carrier gas in the carrier gas circuit through the anesthetic gas circuit, thereby producing anesthetic gas of a certain concentration suitable for surgical procedures. A differential pressure sensor is connected to the anesthetic gas circuit via an anesthetic gas sampling branch and to the carrier gas circuit via a carrier gas sampling branch. The differential pressure sensor can collect the pressures of the anesthetic gas circuit and the carrier gas circuit. A zeroing valve is connected in parallel with the differential pressure sensor. The zeroing valve or solenoid valve can connect the two ends of the differential pressure sensor. By controlling the connected or closed state of the zeroing valve or solenoid valve, the pressures at both ends of the differential pressure sensor can be equalized, thereby achieving zeroing of the anesthetic vaporizer. During the zeroing process, anesthetic gas does not need to be discharged into the atmosphere, which is beneficial to the environmental safety of the operating room and the health of the staff.

[0035] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0037] Figure 1 This is a schematic diagram of the working principle of an anesthetic vaporizer according to one embodiment of the present invention.

[0038] Figure 2 The diagram is a schematic diagram of the zeroing principle of an anesthetic vaporizer according to an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the principle of an anesthetic vaporizer according to one embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the principle of an anesthetic vaporizer according to another embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the principle of an anesthetic vaporizer according to yet another embodiment of the present invention.

[0042] The main structural marks in the figure are explained as follows:

[0043] 1. Drug pool; 2. Anesthetic gas circuit; 21. Anesthetic gas sampling branch; 22. Safety valve; 23. Proportional valve; 24. Cone valve; 3. Carrier gas circuit; 31. Carrier gas sampling branch; 32. Gas resistance element; 4. Differential pressure sensor; 5. Solenoid valve; 51. Third branch; 6. Zeroing valve; 61. First branch; 62. Second branch; 7. Control center; 8. Heating assembly. DETAILED DESCRIPTION

[0044] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present invention and are not necessarily drawn to scale.

[0045] While relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It should be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through the other structure.

[0046] The terms "a", "an", "the", and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first" and "second" are used only as labels and do not limit the quantity of their objects.

[0047] To ensure that the anesthetic gas concentration produced by the anesthesia vaporizer meets the set value, zero calibration is required during use. The anesthesia vaporizer is equipped with a differential pressure sensor. Zero calibration is achieved by driving a proportional valve or solenoid valve to control the pressure balance across the differential pressure sensor. However, existing structures release anesthetic gas into the atmosphere during differential pressure sensor calibration, which is detrimental to the operating room environment and the health of staff.

[0048] Based on this, Figures 1 to 5 As shown, an embodiment of the present invention provides an anesthetic vaporizer for an anesthesia machine, comprising a drug pool 1, an anesthetic gas circuit 2, a carrier gas circuit 3, a differential pressure sensor 4, a solenoid valve 5 and a zeroing valve 6. The medicine pool 1 is used to generate anesthetic gas; one end of the anesthetic gas circuit 2 is connected to the medicine pool 1; the end of the carrier gas circuit 3 is connected to the end of the anesthetic gas circuit 2; the differential pressure sensor 4 has at least two sampling ends, the sampling ends include an anesthetic gas sampling end and a carrier gas sampling end, the anesthetic gas sampling end is connected to the anesthetic gas circuit 2 through the anesthetic gas sampling branch 21, and the carrier gas sampling end is connected to the carrier gas circuit 3 through the carrier gas sampling branch 31; the solenoid valve 5 is arranged on the anesthetic gas sampling branch 21 and / or the carrier gas sampling branch 31, for connecting or closing the anesthetic gas sampling branch 21 and / or the carrier gas sampling branch 31; the zeroing valve 6 is connected in parallel with the differential pressure sensor 4, and is arranged between the anesthetic gas sampling branch 21 and the carrier gas sampling branch 31; wherein, by controlling the connection or closing state of the solenoid valve 5 and / or the zeroing valve 6, the pressure at both ends of the differential pressure sensor 4 is equal.

[0049] In the anesthetic vaporizer of the present invention, the anesthetic gas produced by the drug pool 1 can be mixed with the carrier gas in the carrier gas circuit 3 through the anesthetic gas circuit 2, thereby producing an anesthetic gas of a certain concentration that can be used for surgery. The differential pressure sensor 4 is connected to the anesthetic gas circuit 2 through the anesthetic gas sampling branch 21 and to the carrier gas circuit 3 through the carrier gas sampling branch 31. The differential pressure sensor 4 can collect the pressures of the anesthetic gas circuit 2 and the carrier gas circuit 3. The zeroing valve 6 is connected in parallel with the differential pressure sensor 4. The zeroing valve 6 or the solenoid valve 5 can connect the two ends of the differential pressure sensor 4. By controlling the connection or closed state of the zeroing valve 6 or the solenoid valve 5, the pressures at both ends of the differential pressure sensor 4 can be equalized, thereby achieving zeroing of the anesthetic vaporizer. During the zeroing process, there is no need to discharge anesthetic gas into the atmosphere, which is beneficial to the environmental safety of the operating room and the health of the staff.

[0050] The following is a detailed description of the various parts of the anesthesia vaporizer provided by the embodiment of the utility model with reference to the accompanying drawings:

[0051] Example 1:

[0052] like Figure 1 、 Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the anesthetic vaporizer includes a drug pool 1, an anesthetic gas line 2, a carrier gas line 3, a differential pressure sensor 4, a solenoid valve 5, and a zeroing valve 6. The drug pool 1 can be a sealed box structure, and the anesthetic agent is perfused inside the drug pool 1. By heating or other treatment methods of the anesthetic agent inside the drug pool 1, the liquid anesthetic agent is converted into an inhalable anesthetic gas.

[0053] The inlet end of the anesthetic gas circuit 2 is connected to the drug pool 1, and the anesthetic gas in the drug pool 1 enters the anesthetic gas circuit 2. The anesthetic gas circuit 2 is connected to the breathing circuit, so that the anesthetic gas can be delivered to the patient's respiratory system.

[0054] The end of the carrier gas circuit 3 is connected to the anesthetic gas circuit 2 and to the breathing circuit. Because anesthetic gas must reach a set concentration before it can be used by the patient, carrier gas is introduced into the carrier gas circuit 3 and mixed with the anesthetic gas in the anesthetic gas circuit 2 to produce a certain concentration of anesthetic gas suitable for patient absorption. The anesthetic gas then enters the patient's respiratory system through the breathing circuit. The carrier gas can be fresh air, oxygen, or other gases.

[0055] The differential pressure sensor 4 has at least two sampling ends, including an anesthetic gas sampling end and a carrier gas sampling end. The anesthetic gas sampling end is connected to the anesthetic gas circuit 2 via the anesthetic gas sampling branch 21, and the carrier gas sampling end is connected to the carrier gas circuit 3 via the carrier gas sampling branch 31. Specifically, the two sampling ends of the differential pressure sensor 4 are used to collect the pressure on the anesthetic gas circuit 2 and the carrier gas circuit 3, respectively, and control the flow of the anesthetic gas in the anesthetic gas circuit 2 and the flow of the carrier gas in the carrier gas circuit 3 by pressure. One end of the anesthetic gas sampling branch 21 is connected to the anesthetic gas circuit 2, and the other end is connected to the anesthetic gas sampling end of the differential pressure sensor 4; one end of the carrier gas sampling branch 31 is connected to the carrier gas circuit 3, and the other end is connected to the carrier gas sampling end of the differential pressure sensor 4. When gas is flowing in both the anesthetic gas circuit 2 and the carrier gas circuit 3, the differential pressure sensor 4 can collect the pressure values on the two gas circuits respectively, thereby controlling the anesthetic gas concentration by controlling the pressure values at both ends of the differential pressure sensor 4. For example, when the differential pressure sensor 4 needs to be zeroed, the pressures at both ends of the differential pressure sensor 4 may be made equal to achieve zeroing of the differential pressure sensor 4 .

[0056] The solenoid valve 5 is provided on the anesthetic gas sampling branch 21 and / or the carrier gas sampling branch 31, and is used to connect or close the anesthetic gas sampling branch 21 and / or the carrier gas sampling branch 31. Specifically, the solenoid valve 5 can be provided on the anesthetic gas sampling branch 21, the carrier gas sampling branch 31, or both the anesthetic gas sampling branch 21 and the carrier gas sampling branch 31. The solenoid valve 5 has two states: open and closed. When the anesthetic vaporizer is operating, that is, when anesthetic gas needs to be input into the breathing circuit, the solenoid valve 5 is in the open state; when the anesthetic vaporizer needs to be zeroed, the solenoid valve 5 is in the closed state.

[0057] The zeroing valve 6 is connected in parallel with the pressure differential sensor 4 and is arranged between the anesthetic gas sampling branch 21 and the carrier gas sampling branch 31. Specifically, the zeroing valve 6 is connected to the anesthetic gas sampling end of the pressure differential sensor 4 through the first branch 61, and the zeroing valve 6 is connected to the carrier gas sampling end of the pressure differential sensor 4 through the second branch 62. That is, the zeroing valve 6 can connect the two ends of the pressure differential sensor 4. When the anesthetic vaporizer is working, the zeroing valve 6 is closed and the solenoid valve 5 is opened, and the pressure differential sensor 4 can normally collect the pressure on the anesthetic gas circuit 2 and the carrier gas circuit 3; when the anesthetic vaporizer needs to be zeroed, the solenoid valve 5 is closed and the zeroing valve 6 is opened, and the pressure differential sensor 4 can no longer collect the pressure on the anesthetic gas circuit 2 and the carrier gas circuit 3, so that the two ends of the pressure differential sensor 4 are connected, so that the pressure at the two ends of the pressure differential sensor 4 can be equalized, thereby achieving zeroing of the anesthetic vaporizer. When zeroing the anesthesia vaporizer, there is no need to connect both ends of the differential pressure sensor 4 to the atmosphere to achieve pressure balance, so there is no need to discharge anesthetic gas into the atmosphere, that is, zeroing is achieved and the air environment in the operating room can be kept safe.

[0058] like Figure 1 and Figure 2 As shown, a solenoid valve 5 is provided on the carrier gas sampling branch 31. When the anesthetic vaporizer is in operation, the solenoid valve 5 is in the open state, the carrier gas path 3 is connected to the carrier gas sampling end, and the zeroing valve 6 is closed. When zeroing is performed, the solenoid valve 5 is in the closed state, the solenoid valve 5 disconnects the carrier gas path 3 from the carrier gas sampling end, the zeroing valve 6 is opened, and the two ends of the differential pressure sensor 4 are connected.

[0059] like Figure 4 As shown, two solenoid valves 5 are provided, one on the carrier gas sampling branch 31 and the other on the anesthetic gas sampling branch 21. When the anesthetic vaporizer is working, both solenoid valves 5 are in the open state; when zeroing, both solenoid valves 5 are in the closed state.

[0060] Exemplarily, the anesthetic vaporizer further includes a heating assembly 8, which is connected to the medicine pool 1 and is used to heat the anesthetic agent in the medicine pool 1 and generate anesthetic gas. The heating assembly 8 can be a heating tube, etc., and depending on the type of heating assembly 8, the heating assembly 8 can be disposed inside or outside the medicine pool 1. The present invention does not specifically limit the specific type and arrangement of the heating assembly 8. Those skilled in the art can select the heating assembly 8 according to actual needs, as long as it can heat the anesthetic agent in the medicine pool 1.

[0061] In one embodiment of the present invention, the anesthetic vaporizer further includes a safety valve 22 and a proportional valve 23. The safety valve 22 is provided on the anesthetic gas circuit 2 to control the opening or closing of the anesthetic gas circuit 2. Specifically, the safety valve 22 is located between the medicine pool 1 and the connection point between the anesthetic gas circuit 2 and the anesthetic gas sampling branch 21. When the safety valve 22 is open, the anesthetic gas can circulate in the anesthetic gas circuit 2. When the safety valve 22 is closed, the anesthetic gas cannot circulate in the anesthetic gas circuit 2. When an emergency occurs, the safety valve 22 can be closed to stop the output of the anesthetic gas, which is beneficial to ensure the safety of the patient during treatment.

[0062] The proportional valve 23 is provided on the anesthetic gas circuit 2 and is used to control the flow rate of the anesthetic gas in the anesthetic gas circuit 2. Specifically, the proportional valve 23 is located between the safety valve 22 and the connection point between the anesthetic gas circuit 2 and the anesthetic gas sampling branch 21. By controlling the degree of opening of the proportional valve 23, the flow rate of the anesthetic gas in the anesthetic gas circuit 2 is controlled, thereby producing anesthetic gas of varying concentrations.

[0063] like Figure 3As shown, in one embodiment of the present invention, the anesthetic vaporizer further includes a control center 7. The control center 7 is electrically connected to the solenoid valve 5, the zeroing valve 6, the heating assembly 8, the safety valve 22, and the proportional valve 23. The control center 7 can control the anesthetic vaporizer to produce anesthetic gas or perform zeroing according to the received instructions. For example, after the control center 7 receives the instruction for the anesthetic vaporizer to start working, the control center 7 controls the heating assembly 8 to work, controls the safety valve 22 and the proportional valve 23 to open, so that the anesthetic gas circuit 2 is unobstructed, and controls the solenoid valve 5 to be in an open state, so that the anesthetic gas sampling branch 21 and the carrier gas sampling branch 31 are unobstructed, and at the same time controls the zeroing valve 6 to be closed, so that the anesthetic gas in the anesthetic gas circuit 2 and the carrier gas in the carrier gas circuit 3 are mixed to produce a certain concentration of anesthetic gas, which is then delivered to the breathing circuit.

[0064] Furthermore, to facilitate operation and zero calibration of the anesthetic vaporizer, the anesthetic vaporizer also includes a handwheel and a cone valve 24. The handwheel and cone valve 24 are connected, and the cone valve 24 is positioned on the anesthetic gas circuit 2, between the connection point between the anesthetic gas sampling branch 21 and the anesthetic gas circuit 2, and between the connection point between the anesthetic gas circuit 2 and the carrier gas circuit 3. The handwheel and cone valve 24 work in tandem to adjust the flow of the anesthetic gas circuit 2 and the air resistance of the cone valve 24.

[0065] For example, the handwheel includes a zero position and a non-zero position. When the handwheel is at the zero position, the anesthetic vaporizer does not work; when the handwheel is turned, the handwheel switches from the zero position to the non-zero position, and a signal can be sent to the control center 7. After receiving the command control, the control center 7 controls the safety valve 22 and the solenoid valve 5 to open, and the pressure difference sensor 4 collects the pressure of the carrier gas sampling branch 31 and the anesthetic gas sampling branch 21, and feeds back to the control center 7. The control center 7 controls the opening size of the proportional valve 23 according to the received signal, thereby generating anesthetic gas of the set concentration; when zeroing is required, the handwheel is turned, and the handwheel switches from the non-zero position to the zero position, and the cone valve 24 is closed. After receiving the signal, the control center 7 controls the safety valve 22, the proportional valve 23 and the solenoid valve 5 to close, and controls the zeroing valve 6 to open, so that the two ends of the pressure difference sensor 4 are connected, thereby achieving zeroing; when the handwheel is rotated in the non-zero position, the opening and closing size of the cone valve 24 can be adjusted, and the concentration of the anesthetic gas output can be adjusted.

[0066] For example, a gas resistance element 32 is provided on the carrier gas circuit 3, and is located between the connection point between the carrier gas sampling branch 31 and the carrier gas circuit 3, and between the connection point between the carrier gas circuit 3 and the anesthesia gas circuit 2. The gas resistance element 32 can control the flow rate of the carrier gas, allowing the carrier gas to flow smoothly in the carrier gas circuit 3.

[0067] The present invention also provides an anesthesia machine, which includes an anesthesia host and an anesthesia vaporizer. The anesthesia host includes an air supply system and a breathing circuit. The anesthesia vaporizer is arranged on the anesthesia host and is connected to the air supply system. The anesthetic gas generated by the anesthesia vaporizer can enter the patient's respiratory system through the breathing circuit.

[0068] Example 2:

[0069] like Figure 5 As shown, this embodiment differs from the first embodiment in that the solenoid valve 5 in this embodiment is a two-position, three-way valve, i.e., the solenoid valve 5 has two operating positions, namely, a sampling position and a zeroing position, and this embodiment does not include a zeroing valve 6. The solenoid valve 5 can be disposed on the anesthetic gas sampling branch 21 or the carrier gas sampling branch 31. For example, the solenoid valve 5 is disposed on the carrier gas sampling branch 31 and has three interfaces, one of which is connected to the carrier gas sampling port of the differential pressure sensor 4, another to the carrier gas line 3, and the final interface to the anesthetic gas sampling branch 21 via the third branch 51.

[0070] When the anesthetic vaporizer is working, the hand wheel is turned to open the cone valve 24, and the hand wheel is turned to a certain scale, carrier gas flows in the carrier gas branch, the control center 7 controls the heating component 8 to work, controls the safety valve 22 and the proportional valve 23 to open, controls the solenoid valve 5 to be in the sampling working position, and the differential pressure sensor 4 can respectively collect the pressure of the anesthetic gas circuit 2 and the carrier gas circuit 3. According to the pressure value detected by the differential pressure sensor 4, the control center 7 controls the proportional valve 23 to output a certain amount of anesthetic gas, so that the anesthetic gas in the anesthetic gas circuit 2 and the carrier gas in the carrier gas circuit 3 are mixed to produce anesthetic gas with a certain concentration; when zeroing is required, the hand wheel is turned to zero position, the cone valve 24 is closed, the control center 7 controls the safety valve 22 and the proportional valve 23 to be closed, and at the same time controls the solenoid valve 5 to switch to the zeroing working position, and connects the two ends of the differential pressure sensor 4 through the third branch 51, so that the pressure at both ends of the differential pressure sensor 4 can be equalized to achieve zeroing.

[0071] Those skilled in the art will readily envision other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the appended claims.

Claims

1. An anesthetic vaporizer, characterized in that: include: A medicine tank (1), for generating anesthetic gas; an anesthetic gas circuit (2), one end of the anesthetic gas circuit (2) being connected to the drug pool (1); a carrier gas circuit (3), wherein an end of the carrier gas circuit (3) is connected to an end of the anesthesia gas circuit (2); A differential pressure sensor (4) having at least two sampling ends, the sampling ends including an anesthetic gas sampling end and a carrier gas sampling end, the anesthetic gas sampling end being in communication with the anesthetic gas circuit (2) via an anesthetic gas sampling branch (21), and the carrier gas sampling end being in communication with the carrier gas circuit (3) via a carrier gas sampling branch (31); a solenoid valve (5), provided on the anesthetic gas sampling branch (21) and / or the carrier gas sampling branch (31), for connecting or closing the anesthetic gas sampling branch (21) and / or the carrier gas sampling branch (31); a zeroing valve (6) connected in parallel with the differential pressure sensor (4) and arranged between the anesthetic gas sampling branch (21) and the carrier gas sampling branch (31); The pressures at both ends of the pressure difference sensor (4) are made equal by controlling the connection or closing state of the electromagnetic valve (5) and / or the zero calibration valve (6), thereby achieving zero calibration.

2. The anesthetic vaporizer according to claim 1, characterized in that: The anesthetic vaporizer also includes: The control center (7) is electrically connected to the electromagnetic valve (5) and the zeroing valve (6) and is used to control the opening or closing state of the electromagnetic valve (5) and the zeroing valve (6).

3. The anesthetic vaporizer according to claim 1, characterized in that The anesthetic vaporizer also includes: A heating component (8) is connected to the medicine pool (1) and is used to heat the medicine pool (1) and generate anesthetic gas.

4. The anesthetic vaporizer according to claim 2, characterized in that: The anesthetic vaporizer also includes: A safety valve (22) is provided on the anesthesia gas circuit (2) and is electrically connected to the control center (7). The safety valve (22) is used to control the opening or closing of the anesthesia gas circuit (2).

5. The anesthetic vaporizer according to claim 2, characterized in that: The anesthetic vaporizer also includes: A proportional valve (23) is provided on the anesthesia gas circuit (2) and is electrically connected to the control center (7). The proportional valve (23) is used to control the flow of the anesthesia gas in the anesthesia gas circuit (2).

6. The anesthetic vaporizer according to claim 2, characterized in that: The anesthetic vaporizer also includes: Handwheel; A cone valve (24) is provided on the anesthetic gas circuit (2), wherein the cone valve (24) is located between a connection point between the anesthetic gas sampling branch (21) and the anesthetic gas circuit (2), and a connection point between the anesthetic gas circuit (2) and the carrier gas circuit (3); The hand wheel cooperates with the cone valve (24) to control the output of anesthetic gas of a set concentration.

7. The anesthetic vaporizer according to claim 6, characterized in that: The hand wheel includes a zero position and a non-zero position. When the hand wheel switches from the zero position to the non-zero position, the control center (7) controls the solenoid valve (5) and / or the zero calibration valve (6) to switch between an open and a closed state.

8. The anesthetic vaporizer according to claim 1, characterized in that: The anesthetic vaporizer also includes: An air resistance element (32) is provided on the carrier gas circuit (3), and the air resistance element (32) is located between the connection point between the carrier gas sampling branch (31) and the carrier gas circuit (3), and the connection point between the carrier gas circuit (3) and the anesthesia gas circuit (2).

9. The anesthetic vaporizer according to claim 1, characterized in that: When the pressures at both ends of the pressure differential sensor (4) are controlled to be equal by controlling the solenoid valve (5), the solenoid valve (5) is a two-position three-way valve, the solenoid valve (5) is located on the anesthetic gas sampling branch (21), and the carrier gas sampling branch (31) is connected to the solenoid valve (5), or The solenoid valve (5) is located on the carrier gas sampling branch (31), and the anesthetic gas sampling branch (21) is in communication with the solenoid valve (5).

10. An anesthesia machine, characterized in that: The anesthesia machine comprises an anesthesia machine main unit and the anesthesia vaporizer according to any one of claims 1 to 9, wherein the anesthesia machine main unit comprises a gas supply system, the anesthesia vaporizer is arranged on the anesthesia machine main unit, and the gas supply system is connected to the anesthesia vaporizer so that the anesthesia vaporizer can provide anesthetic gas to the patient through a breathing circuit.

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