CN112827035A - Electric control anesthetic gas evaporation tank and method for regulating and controlling output concentration of inhaled anesthetic - Google Patents

Electric control anesthetic gas evaporation tank and method for regulating and controlling output concentration of inhaled anesthetic Download PDF

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CN112827035A
CN112827035A CN202011633442.1A CN202011633442A CN112827035A CN 112827035 A CN112827035 A CN 112827035A CN 202011633442 A CN202011633442 A CN 202011633442A CN 112827035 A CN112827035 A CN 112827035A
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anesthetic
pressure
gas
controller
anesthetic gas
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刘加龙
王凯
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Beijing Aeonmed Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/18—Vaporising devices for anaesthetic preparations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter

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  • Anesthesiology (AREA)
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Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to an electric control evaporation tank, which comprises: the gear-shifting control system comprises a controller (1), a gear adjusting component (2), a pressure balancing component (3) and a temperature control component (4); the controller (1) is electrically connected with the gear adjusting assembly (2), the pressure balancing assembly (3) and the temperature control assembly (4) respectively; the temperature control assembly (4) is connected with an anesthetic gas pipeline (7), the anesthetic gas pipeline (7) is also connected with the pressure balance assembly (3) and the gear adjusting assembly (2), the pressure balance assembly (3) and the temperature control assembly (4) are communicated with the anesthetic gas pipeline (7); the pressure balance component (3) is also connected with a fresh gas pipeline (6), and the output end of the anesthetic gas pipeline (7) and the output end of the fresh gas pipeline (6) are both connected into the inlet end of the gas mixing pipe (5).

Description

Electric control anesthetic gas evaporation tank and method for regulating and controlling output concentration of inhaled anesthetic
Technical Field
The invention belongs to the technical field of medical equipment, and particularly relates to an electric control anesthetic gas evaporating pot and a method for regulating and controlling output concentration of inhalation anesthetic.
Background
Among medical devices, anesthesia machines are widely used as medical instruments indispensable for surgical anesthesia, and the functions of the anesthesia machines are inhalation anesthesia and mechanical ventilation for a patient during surgery. The method specifically comprises the following steps: the appropriate amount of anesthetic mixed gas is inhaled to the operation patient, and meanwhile, a certain proportion of oxygen is supplied to ensure normal breathing, so that the vital signs of the patient in the operation are maintained and monitored in the process of implementing general anesthesia, and the safe and reliable operation is ensured.
The anesthetic gas evaporating pot, namely an anesthetic gas evaporator, is an essential important part of the anesthesia machine. The anesthetic evaporation tank has the function of heating the liquid inhalation anesthetic, mixing the vaporized inhalation anesthetic with oxygen and air to obtain the output concentration of the inhalation anesthetic, and inputting the output concentration to a patient for inhalation to finish the inhalation anesthetic process. The basic principle of the anesthetic vaporizer is to change anesthetic drugs into vaporized gas by using the change of the temperature of the surrounding environment and a heat source, and the vaporized gas passes through a certain amount of carrier gas to become a gas flow of anesthetic vapor with a certain concentration and directly enters an anesthetic loop.
At present, the existing anesthetic gas evaporation tank is mainly a mechanical evaporation tank, but the mechanical evaporation tank can only roughly control the output concentration of the inhalation anesthetic due to the influence of factors such as temperature, pressure, flow and the like, and particularly, the accurate control of the output concentration of the inhalation anesthetic cannot be realized during low-flow anesthesia.
Disclosure of Invention
In order to solve the above defects in the prior art, the invention provides an electrically controlled evaporation tank, which comprises: the device comprises a controller, a gear adjusting component, a pressure balancing component and a temperature control component;
the controller is electrically connected with the gear adjusting assembly, the pressure balancing assembly and the temperature control assembly respectively; the temperature control assembly is connected with an anesthetic gas pipeline, the anesthetic gas pipeline is also connected with a pressure balance assembly and a gear adjusting assembly, the pressure balance assembly is positioned between the temperature control assembly and the gear adjusting assembly, the pressure balance assembly and the temperature control assembly are all communicated with the anesthetic gas pipeline; the pressure balance assembly is also connected with a fresh gas pipeline, and the output end of the anesthetic gas pipeline and the output end of the fresh gas pipeline are both connected into the inlet end of the gas mixing pipe.
As an improvement of the above technical solution, the temperature control assembly includes: the device comprises an evaporation chamber, a pressure sensor, a temperature sensor, a heating rod and an electronic liquid level meter;
anesthetic is put into the evaporation chamber, and a heating rod and an electronic liquid level meter are arranged at the bottom of the evaporation chamber; the top of the evaporation chamber is provided with a pressure sensor and a temperature sensor; the heating rod and the electronic liquid level meter are respectively and electrically connected with the controller 1, and the pressure sensor and the temperature sensor are respectively and electrically connected with the controller;
the heating rod is used for heating the anesthetic to evaporate the anesthetic into anesthetic gas;
the electronic liquid level meter is used for monitoring the liquid level of the anesthetic placed in the evaporation chamber in real time and sending the real-time monitored liquid level value to the controller;
the pressure sensor is used for monitoring the pressure value in the evaporation chamber in real time and sending the pressure value to the controller;
and the temperature sensor is used for acquiring the temperature value in the evaporation chamber in real time and sending the temperature value to the controller.
As an improvement of the above technical solution, the pressure balancing assembly includes: the device comprises an electromagnetic on-off valve, a flow proportional control valve, a first differential pressure sensor, a second differential pressure sensor and a fixed air resistance;
one end of the first differential pressure sensor is connected with the fresh gas pipeline, and the other end of the first differential pressure sensor is connected with the anesthetic gas pipeline, and the pressure difference between the fresh gas pipeline and the anesthetic gas pipeline is respectively collected; one end of the second differential pressure sensor is connected with the fresh gas pipeline, the other end of the second differential pressure sensor is connected with the anesthetic gas pipeline, and the pressure difference between the fresh gas pipeline and the anesthetic gas pipeline is collected again respectively;
the fresh gas mixing pipeline is connected with the first differential pressure sensor and the second differential pressure sensor, wherein a fixed air resistor is arranged at the common input end of the first differential pressure sensor and the second differential pressure sensor, which is connected with the fresh gas pipeline, and the fresh gas flows into the inlet end of the gas mixing pipeline through the fixed air resistor; a flow proportional control valve is arranged at the common input end of the first differential pressure sensor and the second differential pressure sensor, which is connected with an anesthetic gas pipeline;
the electromagnetic on-off valve and the flow proportional control valve are both arranged on the anesthetic gas pipeline, the electromagnetic on-off valve is arranged below the flow proportional control valve, and the electromagnetic on-off valve is arranged close to the temperature control assembly;
the flow proportional control valve is arranged on the electromagnetic on-off valve, the gas flow rate of the anesthetic gas flowing through the electromagnetic on-off valve is controlled in real time by adopting a PID control mode according to the pressure difference acquired by the first pressure difference sensor and the second pressure difference sensor respectively when the electromagnetic on-off valve is opened until the pressure difference acquired by the first pressure difference sensor and the second pressure difference sensor respectively is 0, and the anesthetic gas at the current flow rate is input to the gear adjusting assembly.
As an improvement of the above technical solution, the gear adjusting component is a variable air resistance, the variable air resistance is electrically connected with the controller, and the information of the opening position of the anesthetic gas flow at the current flow rate passing through the variable air resistance is collected in real time and input to the controller; according to the adjusting instruction sent by the controller, the opening position of the variable air resistance is adjusted, so that the flow of the anesthetic gas is adjusted.
The invention also provides a method for regulating and controlling the output concentration of the inhalation anesthetic, which comprises the following steps:
the temperature control assembly acquires the temperature and the pressure of the placed anesthetic in real time and inputs the temperature and the pressure into the controller; the controller controls the temperature and the pressure in the evaporation chamber in real time according to the temperature and the pressure of the anesthetic which is collected by the temperature control assembly in real time, so that the anesthetic is changed into anesthetic gas which is output through an anesthetic gas pipeline;
the pressure balance assembly respectively collects the pressure difference of the fresh gas and the anesthetic gas in each gas path in real time to obtain two different pressure differences, and the two different pressure differences are input into the controller; the controller judges whether each pressure difference is 0 or not according to the two pressure differences sent by the pressure balancing component, adjusts the gas flow rate of the anesthetic gas according to the judgment result until the two pressure differences are both 0, obtains the anesthetic gas with the current flow rate, and inputs the anesthetic gas into the gear adjusting component through the anesthetic gas pipeline;
the gear adjusting assembly sends opening position information flowing through an anesthetic gas pipeline to the controller, the controller sends an adjusting instruction to the gear adjusting assembly according to the required output concentration of the inhalation anesthetic, adjusts the opening position of the anesthetic gas pipeline flowing through, adjusts the gas flow of the anesthetic gas with the current flow speed, outputs the anesthetic gas with the adjusted flow, and inputs the anesthetic gas to the inlet end of the gas mixing pipe;
the pressure balance assembly enables fresh gas to flow into the inlet end of the gas mixing pipeline through the fixed air resistor, the anesthetic gas and the fresh gas after flow adjustment are mixed at the inlet end of the gas mixing pipeline, anesthetic gas with required inhalation anesthetic output concentration is obtained, and the anesthetic gas is output through the outlet end of the gas mixing pipeline.
As one improvement of the technical scheme, the temperature control assembly acquires the temperature and the pressure of the placed anesthetic in real time and inputs the temperature and the pressure into the controller; the controller controls the temperature and the pressure in the evaporation chamber in real time according to the temperature and the pressure of the anesthetic which is collected by the temperature control assembly in real time, so that the anesthetic is changed into anesthetic gas which is output through an anesthetic gas pipeline; the specific process is as follows:
the pressure sensor monitors the pressure value in the evaporation chamber in real time and sends the pressure value to the controller; the temperature sensor collects the temperature value in the evaporation chamber in real time and sends the temperature value to the controller;
the controller judges whether the evaporation environment required by the anesthetic placed in the evaporation chamber to be evaporated into anesthetic gas is achieved or not according to the pressure value and the temperature value obtained in real time;
if the anesthetic put into the evaporation chamber is evaporated to become the evaporation environment required by the anesthetic gas, the controller sends a heating stop instruction to the heating rod, the heating rod stops heating, the anesthetic put into the evaporation chamber is evaporated to become the anesthetic gas, and the anesthetic gas is output through an anesthetic gas pipeline;
if the evaporation environment required by the anesthetic put into the evaporation chamber to be evaporated into anesthetic gas is not reached, the controller sends a heating instruction to the heating rod, the heating rod continuously heats, the temperature and the pressure in the evaporation chamber are controlled in real time until the required evaporation environment is reached, heating is stopped, the anesthetic put into the evaporation chamber is evaporated into anesthetic gas, and the anesthetic gas is output through an anesthetic gas pipeline;
the evaporation environment is a preset temperature threshold and a preset pressure threshold.
As one improvement of the technical scheme, the pressure balance assembly respectively collects the pressure difference of the fresh gas and the anesthetic gas in each gas path in real time to obtain two different pressure differences, and the two different pressure differences are input into the controller; the controller judges whether each pressure difference is 0 or not according to the two pressure differences sent by the pressure balancing component, adjusts the gas flow rate of the anesthetic gas according to the judgment result until the two pressure differences are both 0, obtains the anesthetic gas with the current flow rate, and inputs the anesthetic gas into the gear adjusting component through the anesthetic gas pipeline; the specific process comprises the following steps:
the first differential pressure sensor collects a first pressure difference between fresh gas and anesthetic gas in real time, the second differential pressure sensor collects a second pressure difference between the fresh gas and the anesthetic gas in real time, and the first pressure difference and the second pressure difference are respectively sent to the controller;
the controller calculates a control input value U of the kth first pressure difference sampling moment which can be identified by the controller in a PID control mode according to the first pressure differencek；
Figure BDA0002877587170000041
Wherein, UkA control input value for the kth first pressure difference sampling time which can be identified by the controller; e.g. of the typekA first pressure difference value at the kth first pressure difference sampling time; e.g. of the typek-1The first pressure difference value at the k-1 st sampling moment of the first pressure difference is obtained; kPIs a proportionality coefficient; kIIs an integral coefficient; kDIs a differential coefficient; u shape0Is the initial value of PID control; e.g. of the typejThe first pressure error value is the jth pressure error value in the regulation and control process;
the controller 1 calculates a control input value U of the kth second pressure difference sampling time which can be identified by the controller in a PID control mode according to the second pressure differencek*；
Figure BDA0002877587170000042
Wherein, UkControl input values of the kth second pressure difference sampling time which can be identified by the controller; e.g. of the typekIs the second pressure difference value at the kth second pressure difference sampling time; e.g. of the typek-1The second pressure difference value at the k-1 th second pressure difference sampling time is shown; kPIs a proportionality coefficient; kIIs an integral coefficient; kDIs a differential coefficient; u shape0Is the initial value of PID control; e.g. of the typejA j-th second pressure error value in the regulation and control process;
the controller obtains U according to calculationkAnd UkA first step of; and judge UkAnd UkWhether or not all are 0;
if U is presentkAnd UkIf all the fresh gas is 0, directly outputting the anesthetic gas with the current flow rate to the gear adjusting assembly according to the current position of the proportional valve, and simultaneously inputting the fresh gas with the current flow rate to the inlet end of the gas mixing pipe through the fixed air resistance;
if U is presentkIs not 0 or UkIf not, sending an adjusting instruction to the proportional valve, and adjusting the flow rate of the anesthetic gas until UkAnd UkAll is 0 to output the anesthesia gas of current velocity of flow to gear adjusting part, simultaneously with the fresh gas of current velocity of flow through fixed air lock input to the entry end of gas mixing pipe.
Compared with the prior art, the invention has the beneficial effects that:
the electric control evaporation tank adopts two pressure difference sensors, two ends of each pressure difference sensor are respectively connected with two different gas paths of fresh gas and anesthetic gas, the pressure difference value between the collected fresh gas and the anesthetic gas is sent to the controller, and the controller achieves the purpose of enabling the pressure difference between the fresh gas and the anesthetic gas to be zero by adjusting the proportional valve, so that the flow proportional control valve is accurately controlled, and the output concentration of the inhalation anesthetic outputted by the electric control evaporation tank can be accurately controlled.
Drawings
Fig. 1 is a schematic view of a gas path structure of an electrically controlled evaporation tank of the invention.
Reference numerals:
1. controller 2, gear adjusting part
3. Pressure balance assembly 4 and temperature control assembly
5. Gas mixing pipe 6 and fresh gas pipeline
7. Anesthetic gas pipeline
21. Variable air resistance
31. Electromagnetic on-off valve 32 and flow proportional control valve
33. First and second differential pressure sensors 34 and 34
35. Fixed air resistance
41. Evaporation chamber 42, pressure sensor
43. Temperature sensor 44, heating rod
45. Electronic level gauge 46, anesthetic
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an electrically controlled evaporation tank, which includes: the device comprises a controller 1, a gear adjusting component 2, a pressure balancing component 3 and a temperature control component 4;
the controller 1 is electrically connected with the gear adjusting assembly 2, the pressure balancing assembly 3 and the temperature control assembly 4 respectively; the temperature control assembly 4 is connected with an anesthetic gas pipeline 7, the anesthetic gas pipeline 7 is also connected with the pressure balance assembly 3 and the gear adjusting assembly 2, the pressure balance assembly 3 is positioned between the temperature control assembly 4 and the gear adjusting assembly 2, the pressure balance assembly 3 and the temperature control assembly 4 are all communicated with the anesthetic gas pipeline 7; the pressure balance component 3 is also connected with a fresh gas pipeline 6, and the output end of the anesthetic gas pipeline 7 and the output end of the fresh gas pipeline 6 are both connected into the inlet end of the gas mixing pipe 5 and are communicated with each other.
In this embodiment, the controller 1 is a single chip microcomputer.
The temperature control assembly 4 comprises: an evaporation chamber 41, a pressure sensor 42, a temperature sensor 43, a heating rod 44 and an electronic liquid level meter 45;
anesthetic 46 is put into the evaporation chamber 41, and a heating rod 44 and an electronic liquid level meter 45 are arranged at the bottom of the evaporation chamber 41; the top of the evaporation chamber 41 is provided with a pressure sensor 42 and a temperature sensor 43; the heating rod 44 and the electronic liquid level meter 45 are respectively and electrically connected with the controller 1, and the pressure sensor 42 and the temperature sensor 43 are respectively and electrically connected with the controller 1;
the heating rod 44 is used for heating the anesthetic 46 to evaporate the anesthetic into anesthetic gas;
the electronic liquid level meter 45 is used for monitoring the liquid level of the anesthetic placed in the evaporation chamber 41 in real time and sending the real-time monitored liquid level value to the controller 1; the controller 1 judges whether the liquid level value obtained in real time exceeds a preset liquid level threshold value or not according to the liquid level value obtained in real time;
if the liquid level value obtained in real time is greater than or equal to the preset liquid level threshold value, the anesthetic in the evaporation chamber 41 can be continuously evaporated to be changed into anesthetic gas, that is, the amount of the anesthetic 46 is sufficient, and the anesthetic 46 does not need to be added;
if the liquid level value obtained in real time is smaller than the preset liquid level threshold value, the residual amount of the anesthetic in the evaporation chamber 41 is not enough to be evaporated into anesthetic gas, the anesthetic 46 needs to be added into the evaporation chamber 41 until the obtained liquid level value is larger than or equal to the preset liquid level threshold value, and the anesthetic is continuously evaporated into the anesthetic gas;
the pressure sensor 42 is used for monitoring the pressure value in the evaporation chamber 41 in real time and sending the pressure value to the controller 1;
the temperature sensor 43 is used for acquiring the temperature value in the evaporation chamber 41 in real time and sending the temperature value to the controller 1.
Wherein the anesthetic 46 is a vaporizable anesthetic liquid.
Wherein the pressure balancing assembly 3 comprises: an electromagnetic on-off valve 31, a flow rate proportional control valve 32, a first differential pressure sensor 33, a second differential pressure sensor 34 and a fixed air resistance 35;
one end of the first differential pressure sensor 33 is connected with the fresh gas pipeline 6, and the other end thereof is connected with the anesthetic gas pipeline 7, and respectively collects the pressure value of the fresh gas pipeline 6 and the pressure difference between the anesthetic gas pipelines 7; one end of the second differential pressure sensor 34 is connected with the fresh gas pipeline 6, the other end of the second differential pressure sensor is connected with the anesthetic gas pipeline 7, and the pressure values of the fresh gas pipeline 6 and the anesthetic gas pipeline 7 are respectively collected again;
wherein, a fixed air resistor 35 is arranged at the common input end of the first differential pressure sensor 33 and the second differential pressure sensor 34 connected with the fresh gas pipeline 6, and the fresh gas flows into the inlet end of the gas mixing pipeline 5 through the fixed air resistor 35; a flow proportional control valve 32 is arranged at the common input end of the first differential pressure sensor 33 and the second differential pressure sensor 34 connected with the anesthetic gas pipeline 5;
the electromagnetic on-off valve 31 and the flow rate proportional control valve 32 are both arranged on the anesthetic gas pipeline 5, the electromagnetic on-off valve 31 is arranged below the flow rate proportional control valve 32, and the electromagnetic on-off valve 31 is arranged close to the temperature control assembly 4 and can control the on-off of anesthetic gas output from the temperature control assembly 4;
the flow proportional control valve 32 is arranged on the electromagnetic on-off valve 31, can control the gas flow rate of the anesthetic gas flowing through the electromagnetic on-off valve 31 in real time according to the pressure difference acquired by the first pressure difference sensor 33 and the second pressure difference sensor 34 respectively by adopting a PID control mode when the electromagnetic on-off valve 31 is opened until the pressure difference acquired by the first pressure difference sensor 33 and the second pressure difference sensor 34 respectively is 0, and inputs the anesthetic gas at the current flow rate to the gear adjustment assembly 2.
The gear adjusting assembly 2 is a variable air resistance 21, the variable air resistance 21 is electrically connected with the controller 1, and the opening position information of the anesthesia airflow at the current flow rate passing through the variable air resistance can be acquired in real time and input to the controller; according to the adjusting instruction sent by the controller, the opening position of the variable air resistance is adjusted, so that the flow of the anesthetic gas is adjusted, and the required output concentration of the inhalation anesthetic is obtained.
In the present embodiment, the variable air resistor 21 is a stepping motor.
The invention also provides a method for regulating and controlling the output concentration of the inhalation anesthetic, which comprises the following steps:
the temperature control assembly acquires the temperature and the pressure of the placed anesthetic in real time and inputs the temperature and the pressure into the controller; the controller controls the temperature and the pressure in the evaporation chamber in real time according to the temperature and the pressure of the anesthetic which is collected by the temperature control assembly in real time, so that the anesthetic is changed into anesthetic gas which is output through an anesthetic gas pipeline;
specifically, the pressure sensor monitors the pressure value in the evaporation chamber in real time and sends the pressure value to the controller; the temperature sensor collects the temperature value in the evaporation chamber in real time and sends the temperature value to the controller;
the controller judges whether the evaporation environment required by the anesthetic placed in the evaporation chamber to be evaporated into anesthetic gas is achieved or not according to the pressure value and the temperature value obtained in real time;
if the anesthetic put into the evaporation chamber is evaporated to become the evaporation environment required by the anesthetic gas, the controller sends a heating stop instruction to the heating rod, the heating rod stops heating, the anesthetic put into the evaporation chamber is evaporated to become the anesthetic gas, and the anesthetic gas is output through an anesthetic gas pipeline;
if the evaporation environment required by the anesthetic put into the evaporation chamber to be evaporated into anesthetic gas is not reached, the controller sends a heating instruction to the heating rod, the heating rod continuously heats, the temperature and the pressure in the evaporation chamber are controlled in real time until the required evaporation environment is reached, heating is stopped, the anesthetic put into the evaporation chamber is evaporated into anesthetic gas, and the anesthetic gas is output through an anesthetic gas pipeline;
the evaporation environment is a preset temperature threshold and a preset pressure threshold.
The pressure balance assembly respectively collects the pressure difference of the fresh gas and the anesthetic gas in each gas path in real time to obtain two different pressure differences, and the two different pressure differences are input into the controller; the controller judges whether each pressure difference is 0 or not according to the two pressure differences sent by the pressure balancing component, adjusts the gas flow rate of the anesthetic gas according to the judgment result until the two pressure differences are both 0, obtains the anesthetic gas with the current flow rate, and inputs the anesthetic gas into the gear adjusting component through the anesthetic gas pipeline;
specifically, a first pressure difference sensor collects a first pressure difference between fresh gas and anesthetic gas in real time, a second pressure difference sensor collects a second pressure difference between the fresh gas and the anesthetic gas in real time, and the first pressure difference and the second pressure difference are respectively sent to a controller;
the controller calculates a control input value U of the kth first pressure difference sampling moment which can be identified by the controller in a PID control mode according to the first pressure differencek；
Figure BDA0002877587170000081
Wherein, UkA control input value for the kth first pressure difference sampling time which can be identified by the controller; e.g. of the typekA first pressure difference value at the kth first pressure difference sampling time; e.g. of the typek-1The first pressure difference value at the k-1 st sampling moment of the first pressure difference is obtained; kPIs a proportionality coefficient; kIIs an integral coefficient; kDIs a differential coefficient; u shape0Is the initial value of PID control; e.g. of the typejThe first pressure error value is the jth pressure error value in the regulation and control process;
the controller 1 calculates a control input value U of the kth second pressure difference sampling time which can be identified by the controller in a PID control mode according to the second pressure differencek*；
Figure BDA0002877587170000082
Wherein, UkControl input values of the kth second pressure difference sampling time which can be identified by the controller; e.g. of the typekIs the second pressure difference value at the kth second pressure difference sampling time; e.g. of the typek-1The second pressure difference value at the k-1 th second pressure difference sampling time is shown; kPIs a proportionality coefficient; kIIs an integral coefficient; kDIs a differential coefficient; u shape0Is the initial value of PID control; e.g. of the typejA j-th second pressure error value in the regulation and control process;
the controller obtains U according to calculationkAnd UkA first step of; and judge UkAnd UkWhether or not all are 0;
if U is presentkAnd UkIf all the fresh gas is 0, directly outputting the anesthetic gas with the current flow rate to the gear adjusting assembly according to the current position of the proportional valve, and simultaneously inputting the fresh gas with the current flow rate to the inlet end of the gas mixing pipe through the fixed air resistance;
if U is presentkIs not 0 or UkIf not, sending an adjusting instruction to the proportional valve, and adjusting the flow rate of the anesthetic gas until UkAnd UkAll is 0 to output the anesthesia gas of current velocity of flow to gear adjusting part, simultaneously with the fresh gas of current velocity of flow through fixed air lock input to the entry end of gas mixing pipe.
The gear adjusting assembly sends opening position information flowing through an anesthetic gas pipeline to the controller, the controller sends an adjusting instruction to the gear adjusting assembly according to the required output concentration of the inhalation anesthetic, adjusts the opening position of the anesthetic gas pipeline flowing through, adjusts the gas flow of the anesthetic gas with the current flow speed, outputs the anesthetic gas with the adjusted flow, and inputs the anesthetic gas to the inlet end of the gas mixing pipe;
the pressure balance assembly enables fresh gas to flow into the inlet end of the gas mixing pipeline through the fixed air resistor, the anesthetic gas and the fresh gas after flow adjustment are mixed at the inlet end of the gas mixing pipeline, anesthetic gas with required inhalation anesthetic output concentration is obtained, and the anesthetic gas is output through the outlet end of the gas mixing pipeline.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. An electrically controlled evaporation tank, characterized in that it comprises: the gear-shifting control system comprises a controller (1), a gear adjusting component (2), a pressure balancing component (3) and a temperature control component (4);
the controller (1) is electrically connected with the gear adjusting assembly (2), the pressure balancing assembly (3) and the temperature control assembly (4) respectively; an anesthetic gas pipeline (7) is connected to the temperature control assembly (4), a pressure balance assembly (3) and a gear adjusting assembly (2) are connected to the anesthetic gas pipeline (7) at the same time, the pressure balance assembly (3) is located between the temperature control assembly (4) and the gear adjusting assembly (2), the pressure balance assembly (3) and the temperature control assembly (4) are communicated with the anesthetic gas pipeline (7); the pressure balance component (3) is also connected with a fresh gas pipeline (6), and the output end of the anesthetic gas pipeline (7) and the output end of the fresh gas pipeline (6) are both connected into the inlet end of the gas mixing pipe (5).
2. An electrically controlled evaporation tank according to claim 1, characterised in that the temperature control assembly (4) comprises: the device comprises an evaporation chamber (41), a pressure sensor (42), a temperature sensor (43), a heating rod (44) and an electronic liquid level meter (45);
anesthetic (46) is placed in the evaporation chamber (41), and a heating rod (44) and an electronic liquid level meter (45) are arranged at the bottom of the evaporation chamber (41); a pressure sensor (42) and a temperature sensor (43) are arranged at the top of the evaporation chamber (41); the heating rod (44) and the electronic liquid level meter (45) are respectively and electrically connected with the controller (1), and the pressure sensor (42) and the temperature sensor (43) are respectively and electrically connected with the controller (1);
the heating rod (44) is used for heating the anesthetic (46) to evaporate the anesthetic into anesthetic gas;
the electronic liquid level meter (45) is used for monitoring the liquid level of anesthetic (46) placed in the evaporation chamber (41) in real time and sending the real-time monitored liquid level value to the controller (1);
the pressure sensor (42) is used for monitoring the pressure value in the evaporation chamber (41) in real time and sending the pressure value to the controller (1);
and the temperature sensor (43) is used for acquiring the temperature value in the evaporation chamber (41) in real time and sending the temperature value to the controller (1).
3. An electrically controlled evaporation tank according to claim 1, characterised in that the pressure equalization assembly (3) comprises: the device comprises an electromagnetic on-off valve (31), a flow proportional control valve (32), a first differential pressure sensor (33), a second differential pressure sensor (34) and a fixed air resistance (35);
one end of the first differential pressure sensor (33) is connected with the fresh gas pipeline (6), the other end of the first differential pressure sensor is connected with the anesthetic gas pipeline (7), and the pressure difference between the fresh gas pipeline (6) and the anesthetic gas pipeline (7) is respectively collected; one end of the second differential pressure sensor (34) is connected with the fresh gas pipeline (6), the other end of the second differential pressure sensor is connected with the anesthetic gas pipeline (7), and the pressure difference between the fresh gas pipeline (6) and the anesthetic gas pipeline (7) is collected again respectively;
wherein, a fixed air resistor (35) is arranged at the common input end of the first differential pressure sensor (33) and the second differential pressure sensor (34) which is connected with the fresh gas pipeline (6), and the fresh gas flows into the inlet end of the gas mixing pipeline (5) through the fixed air resistor (35); a flow proportional control valve (32) is arranged at the common input end of the first differential pressure sensor (33) and the second differential pressure sensor (34) which is connected with the anesthetic gas pipeline (7);
the electromagnetic on-off valve (31) and the flow proportional control valve (32) are both arranged on the anesthetic gas pipeline (7), the electromagnetic on-off valve (31) is arranged below the flow proportional control valve (32), and the electromagnetic on-off valve (31) is arranged close to the temperature control assembly (4);
the flow proportional control valve (32) is arranged on the electromagnetic on-off valve (31), and according to the pressure difference acquired by the first pressure difference sensor (33) and the pressure difference acquired by the second pressure difference sensor (34), the gas flow rate of the anesthetic gas flowing through the electromagnetic on-off valve (31) is controlled in real time in a PID control mode when the electromagnetic on-off valve (31) is opened until the pressure difference acquired by the first pressure difference sensor (33) and the pressure difference acquired by the second pressure difference sensor (34) are both 0, and the anesthetic gas at the current flow rate is input into the gear adjusting component (2).
4. The electric control evaporation tank as claimed in claim 1, wherein the gear adjustment assembly (2) is a variable air resistor (21), the variable air resistor (21) is electrically connected with the controller (1), and the opening position information of the anesthetic gas flowing through the variable air resistor (21) at the current flow rate is collected in real time and input to the controller (1); according to the adjusting instruction sent by the controller (1), the opening position of the variable air resistance (21) is adjusted, so that the flow of the anesthetic gas is adjusted.
5. A method of regulating the output concentration of an inhalation anesthetic agent, the method being implemented on the basis of a reactive vaporizer according to any of claims 1 to 4, the method comprising:
the temperature control assembly (4) collects the temperature and the pressure of the placed anesthetic (46) in real time and inputs the temperature and the pressure into the controller (1); the controller (1) controls the temperature and the pressure in the evaporation chamber (41) in real time according to the temperature and the pressure of the placed anesthetic (46) acquired by the temperature control assembly (4) in real time, so that the placed anesthetic (46) is changed into anesthetic gas and the anesthetic gas is output through an anesthetic gas pipeline (7);
the pressure balance assembly (3) respectively collects the pressure difference of the fresh gas and the anesthetic gas in each gas path in real time to obtain two different pressure differences, and the two different pressure differences are input into the controller (1); the controller (1) judges whether each pressure difference is 0 or not according to the two pressure differences sent by the pressure balance assembly (3), adjusts the gas flow rate of the anesthetic gas according to the judgment result until the two pressure differences are 0, obtains the anesthetic gas with the current flow rate, and inputs the anesthetic gas into the gear adjusting assembly (2) through an anesthetic gas pipeline;
the gear adjusting component (2) sends opening position information flowing through an anesthetic gas pipeline to the controller (1), the controller (1) sends an adjusting instruction to the gear adjusting component (2) according to the required output concentration of the inhalation anesthetic, adjusts the opening position of the anesthetic gas pipeline flowing through, adjusts the gas flow of the anesthetic gas with the current flow speed, outputs the anesthetic gas with the adjusted flow, and inputs the anesthetic gas to the inlet end of the gas mixing pipe (5);
the pressure balance assembly (3) enables fresh gas to flow into the inlet end of the gas mixing pipeline (5) through the fixed air resistor (35), anesthetic gas and fresh gas after flow adjustment are mixed at the inlet end of the gas mixing pipeline (5), anesthetic gas with required inhalation anesthetic output concentration is obtained, and the anesthetic gas is output through the outlet end of the gas mixing pipeline (5).
6. The method for regulating the output concentration of an inhalation anesthetic in accordance with claim 5, wherein the temperature control unit (4) collects the temperature and pressure of the introduced anesthetic in real time and inputs them to the controller (1); the controller (1) controls the temperature and the pressure in the evaporation chamber (41) in real time according to the temperature and the pressure of the placed anesthetic collected by the temperature control assembly (4) in real time, changes the placed anesthetic (46) into anesthetic gas and outputs the anesthetic gas through an anesthetic gas pipeline (7); the specific process is as follows:
the pressure sensor (42) monitors the pressure value in the evaporation chamber (41) in real time and sends the pressure value to the controller (1); the temperature sensor (43) collects the temperature value in the evaporation chamber (41) in real time and sends the temperature value to the controller (1);
the controller (1) judges whether an evaporation environment required by the anesthetic placed in the evaporation chamber to be evaporated into anesthetic gas is achieved or not according to the pressure value and the temperature value obtained in real time;
if the anesthetic (46) put into the evaporation chamber (41) is evaporated to become the evaporation environment required by the anesthetic gas, the controller (1) sends a heating stop instruction to the heating rod (43), the heating rod (43) stops heating, the anesthetic (46) put into the evaporation chamber (41) is evaporated to become the anesthetic gas, and the anesthetic gas is output through the anesthetic gas pipeline (7);
if the evaporation environment required by the anesthetic (46) put into the evaporation chamber (41) to be evaporated into anesthetic gas is not reached, the controller (1) sends a heating instruction to the heating rod (43), the heating rod (43) continuously heats, the temperature and the pressure in the evaporation chamber (41) are controlled in real time until the required evaporation environment is reached, heating is stopped, the anesthetic (46) put into the evaporation chamber (41) is evaporated into anesthetic gas, and the anesthetic gas is output through an anesthetic gas pipeline (7);
the evaporation environment is a preset temperature threshold and a preset pressure threshold.
7. The method for regulating and controlling the output concentration of inhalation anesthetic as claimed in claim 5, wherein the pressure balance assembly (3) collects the pressure difference of the fresh gas and the anesthetic gas in each gas path in real time respectively to obtain two different pressure differences, and inputs the two different pressure differences to the controller (1); the controller (1) judges whether each pressure difference is 0 or not according to the two pressure differences sent by the pressure balance assembly (3), adjusts the gas flow rate of the anesthetic gas according to the judgment result until the two pressure differences are 0, obtains the anesthetic gas with the current flow rate, and inputs the anesthetic gas into the gear adjusting assembly (2) through an anesthetic gas pipeline; the specific process comprises the following steps:
the first differential pressure sensor (33) collects a first differential pressure of fresh gas and anesthetic gas in real time, the second differential pressure sensor (34) collects a second differential pressure of the fresh gas and anesthetic gas in real time, and the first differential pressure and the second differential pressure are respectively sent to the controller (1);
the controller (1) calculates a control input value U of the kth first pressure difference sampling moment which can be identified by the controller in a PID control mode according to the first pressure differencek；
Figure FDA0002877587160000041
Wherein, UkA control input value for the kth first pressure difference sampling time which can be identified by the controller; e.g. of the typekA first pressure difference value at the kth first pressure difference sampling time; e.g. of the typek-1The first pressure difference value at the k-1 st sampling moment of the first pressure difference is obtained; kPIs a proportionality coefficient; kIIs an integral coefficient; kDIs a differential coefficient; u shape0Is the initial value of PID control; e.g. of the typejThe first pressure error value is the jth pressure error value in the regulation and control process;
the controller (1) calculates a control input value U of the kth second pressure difference sampling time which can be identified by the controller in a PID control mode according to the second pressure differencek*；
Figure FDA0002877587160000042
Wherein, UkControl output of the kth second pressure difference sampling time which can be identified by the controllerEntering a value; e.g. of the typekIs the second pressure difference value at the kth second pressure difference sampling time; e.g. of the typek-1The second pressure difference value at the k-1 th second pressure difference sampling time is shown; kPIs a proportionality coefficient; kIIs an integral coefficient; kDIs a differential coefficient; u shape0Is the initial value of PID control; e.g. of the typejA j-th second pressure error value in the regulation and control process;
the controller (1) calculates UkAnd UkA first step of; and judge UkAnd UkWhether or not all are 0;
if U is presentkAnd UkIf all the fresh gas is 0, directly outputting the anesthetic gas with the current flow rate to the gear adjusting assembly according to the current position of the proportional valve, and simultaneously inputting the fresh gas with the current flow rate to the inlet end of the gas mixing pipe through the fixed air resistance;
if U is presentkIs not 0 or UkIf not, sending an adjusting instruction to the proportional valve, and adjusting the flow rate of the anesthetic gas until UkAnd UkAll is 0 to output the anesthesia gas of current velocity of flow to gear adjusting part, simultaneously with the fresh gas of current velocity of flow through fixed air lock input to the entry end of gas mixing pipe.
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CN108853668A (en) * 2017-05-14 2018-11-23 李晓坤 A kind of inhalation anesthetic electron evaporation device
CN110339443A (en) * 2019-08-14 2019-10-18 北京毅安峰技术有限公司 A kind of inhalation anesthetic vaporising device
CN111973852A (en) * 2020-08-10 2020-11-24 深圳市普博科技有限公司 Method, device and equipment for controlling output concentration of anesthetic and storage medium

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CN101683544A (en) * 2008-09-28 2010-03-31 深圳迈瑞生物医疗电子股份有限公司 Anesthesia evaporator
CN201840751U (en) * 2010-09-26 2011-05-25 深圳市百格医疗技术有限公司 Pressure compensating device of anesthetic evaporator
CN108853668A (en) * 2017-05-14 2018-11-23 李晓坤 A kind of inhalation anesthetic electron evaporation device
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