A medical ventilator and its working method

Abstract

This invention provides a medical ventilator and its operating method: It includes an oxygen delivery pipeline system comprising a first two-position three-way reversing valve, an automatic oxygen supply system, and a manual oxygen supply system. The input port of the first two-position three-way reversing valve is connected to an input pipe with a throttling valve. The two output ports of the first two-position three-way reversing valve are respectively connected to the input terminals of the automatic oxygen supply system and the manual oxygen supply system. The output terminals of the automatic and manual oxygen supply systems are connected to a gas flow meter via parallel pipelines, and an oxygen delivery tube is connected to the output terminal of the gas flow meter. This invention solves the problems of traditional ventilators on the market being bulky, requiring many consumables, and having limited applicability to various operating conditions, failing to provide multiple oxygen supply modes with different respiratory ratios and cycles, and thus failing to meet the needs of different patients. This medical ventilator adopts a portable, small-volume casing design, reducing production costs.

Description

Technical Field

[0001] This invention relates to a medical ventilator and its operating method. Background Technology

[0002] A ventilator is a medical device used to help or replace breathing in patients. Its development dates back to the 1950s, initially used to treat polio. With advancements in medical technology and changes in disease patterns, the application of ventilators has expanded, becoming an indispensable piece of equipment in medical settings such as intensive care units, operating rooms, and emergency rooms.

[0003] Patent application CN202223263899.5 discloses a medical ventilator, but this ventilator is bulky, making it difficult to transport and increasing costs due to excessive consumables during production. Patent application CN202110637770.7 also discloses a medical ventilator, but its applicability is limited; it cannot provide normal oxygen supply without power. Patent application CN202121170227.2 also discloses a ventilator, but it lacks the ability to provide multiple oxygen supply modes with varying respiratory ratios and cycles, making it difficult to meet the needs of different patients.

[0004] Therefore, it is necessary to design a new type of portable medical ventilator that can adapt to various working conditions and meet the oxygen supply needs of different patients in order to solve the above-mentioned technical problems. Summary of the Invention

[0005] In view of the above, the purpose of this invention is to provide a medical ventilator and its working method to solve the problems of traditional ventilators mentioned in the background art, such as large size, many consumables, limited applicable working conditions, inability to provide multiple oxygen supply modes with different breathing ratios and cycles, and difficulty in meeting the needs of different patients.

[0006] The present invention is implemented using the following scheme: A medical ventilator includes an oxygen delivery pipeline system, wherein the oxygen delivery pipeline system includes a first two-position three-way reversing valve, an automatic oxygen supply system and a manual oxygen supply system, wherein the input port of the first two-position three-way reversing valve is connected to an input pipe with a throttle valve, and the two output ports of the first two-position three-way reversing valve are respectively connected to the input ends of the automatic oxygen supply system and the manual oxygen supply system, wherein the output ends of the automatic oxygen supply system and the manual oxygen supply system are connected to a gas flow meter via a parallel pipeline, and an oxygen delivery pipe is connected to the output end of the gas flow meter.

[0007] Furthermore, the automatic oxygen supply system includes a solenoid valve and an electronic control component for controlling the on / off state of the solenoid valve. The input end of the solenoid valve is connected to one of the output ports of a first two-position three-way directional valve via a pipeline, and the output end of the solenoid valve is connected to the input end of a gas flow meter via a parallel pipeline.

[0008] Furthermore, the manual oxygen supply system includes a second two-position three-way reversing valve and a manual valve. The input end of the second two-position three-way reversing valve is connected to one output port of the first two-position three-way reversing valve via a pipeline. One output end of the second two-position three-way reversing valve is connected to the input end of a gas flow meter via a parallel pipeline. The other output end of the second two-position three-way reversing valve is connected to the input end of the manual valve via a pipeline. The output end of the manual valve is connected to the input end of the gas flow meter via a parallel pipeline.

[0009] Furthermore, the parallel pipeline is a four-way connector, and the four ports of the four-way connector are respectively connected to the output end of the solenoid valve, one of the output ends of the second two-position three-way directional valve, the output end of the manual valve, and the input end of the gas flow meter via the pipeline.

[0010] Furthermore, the input end of the input pipe is connected to an oxygen cylinder via a pressure reducing valve.

[0011] Furthermore, the oxygen delivery pipeline system also includes a housing, inside which a horizontal partition is installed via a limiting block, dividing the housing into upper and lower layers. The first two-position three-way reversing valve is installed on the horizontal partition, the throttle valve and the solenoid valve are respectively installed on the horizontal partition on the left and right sides of the first two-position three-way reversing valve, the second two-position three-way reversing valve is installed on the horizontal partition on the rear side of the solenoid valve, and the manual valve is installed on the horizontal partition on the rear side of the first two-position three-way reversing valve.

[0012] Furthermore, the partition plate is provided with mounting slots corresponding to the first two-position three-way directional valve, the solenoid valve, the second two-position three-way directional valve, the manual valve, and the throttle valve, and the electronic control components are mounted on the bottom plate inside the housing.

[0013] Furthermore, the electronic control assembly includes a power supply, a relay, a toggle switch, and a circuit board that are electrically connected to each other, and a position knob is electrically connected to the circuit board.

[0014] A method for using a medical ventilator:

[0015] S1 Automatic Oxygen Supply Mode: When the throttle valve is opened, the input terminal of the automatic oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, and the input terminal of the manual oxygen supply system on the first two-position three-way reversing valve is closed. The solenoid valve is intermittently opened and closed under the control of the electronic control component, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, solenoid valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence.

[0016] S2 Normal Oxygen Supply Mode: When the throttle valve is opened, the input end of the manual oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, the input end of the automatic oxygen supply system on the first two-position three-way reversing valve is closed, the output end of the first two-position three-way reversing valve on the second two-position three-way reversing valve is connected to the four-way connector, and the input end of the manual valve is closed, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, second two-position three-way reversing valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence.

[0017] S3 Manual Intermittent Oxygen Supply Mode: When the throttle valve is opened, the input terminal of the manual oxygen supply system on the first two-position three-way directional valve is connected to the input pipe, and the input terminal of the automatic oxygen supply system on the first two-position three-way directional valve is closed. The output terminal of the first two-position three-way directional valve on the second two-position three-way directional valve is connected to the input terminal of the manual valve, and the output port on the second two-position three-way directional valve connected to the four-way connector is closed, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way directional valve, second two-position three-way directional valve, manual valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence.

[0018] Compared with existing technologies, this invention has the following advantages: It solves the problems of traditional ventilators on the market being bulky, requiring many consumables, and having limited applicability to various working conditions, failing to provide multiple oxygen supply modes with different breathing ratios and cycles, and thus failing to meet the needs of different patients. This medical ventilator adopts a portable, small-volume shell design, reducing production costs. Furthermore, this medical ventilator can select between manual and automatic control modes for oxygen supply via a two-position three-way reversing valve, ensuring its usability under different working conditions. Simultaneously, when using automatic control mode, the oxygen supply cycle and breathing ratio can be set separately using an eight-position knob and a four-position knob, thereby meeting the different oxygen supply needs of patients. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the isometric exploded structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the isometric structure of the present invention;

[0021] Figure 3 This is a top view of the structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the symbol of the present invention;

[0023] Figure 5 This is a diagram illustrating the working method of the present invention.

[0024] In the diagram: 1-First two-position three-way directional valve; 2-Automatic oxygen supply system; 3-Manual oxygen supply system; 4-Throttle valve; 5-Input pipe; 6-Gas flow meter; 7-Oxygen delivery pipe; 8-Solenoid valve; 9-Electrical control components; 10-Second two-position three-way directional valve; 11-Manual valve; 12-Four-way connector; 13-Pressure reducing valve; 14-Oxygen cylinder; 15-Machinery; 16-Horizontal partition; 17-Power supply; 18-Relay; 19-Hand switch; 20-Circuit board; 21-Four-position knob; 22-Eight-position knob. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] like Figure 1-5 As shown, a medical ventilator includes an oxygen delivery pipeline system, which comprises a first two-position three-way reversing valve 1, an automatic oxygen supply system 2, and a manual oxygen supply system 3. The input port of the first two-position three-way reversing valve is connected to an input pipe 5 with a throttle valve 4. The two output ports of the first two-position three-way reversing valve are respectively connected to the input terminals of the automatic oxygen supply system and the manual oxygen supply system. The output terminals of the automatic oxygen supply system and the manual oxygen supply system are connected to a gas flow meter 6 via parallel pipelines. An oxygen delivery pipe 7 is connected to the output terminal of the gas flow meter. The first two-position three-way reversing valve controls the flow of input oxygen to the automatic oxygen supply system or the manual oxygen supply system, thereby enabling the ventilator to be used under different operating conditions and expanding its applicability. The throttle valve is the main switch for the gas circuit, and the oxygen delivery pipe can be connected to an external breathing mask.

[0029] In this embodiment, the automatic oxygen supply system includes a solenoid valve 8 and an electronic control component 9 for controlling the on / off state of the solenoid valve. The input end of the solenoid valve is connected to one of the output ports of a first two-position three-way directional valve via a pipeline, and the output end of the solenoid valve is connected to the input end of a gas flow meter via a parallel pipeline.

[0030] In this embodiment, the manual oxygen supply system includes a second two-position three-way directional valve 10 and a manual valve 11. The input end of the second two-position three-way directional valve is connected to one output port of the first two-position three-way directional valve via a pipeline. Specifically, the input end of the second two-position three-way directional valve and the input end of the solenoid valve are respectively connected to the two output ends of the first two-position three-way directional valve. One output end of the second two-position three-way directional valve is connected to the input end of the gas flow meter via a parallel pipeline. The other output end of the second two-position three-way directional valve is connected to the input end of the manual valve via a pipeline. The output end of the manual valve is connected to the input end of the gas flow meter via a parallel pipeline. The manual valve is an existing two-position two-way control valve, model MOV-04 normally closed knob valve.

[0031] In this embodiment, the parallel pipeline is a four-way connector 12. The four ports of the four-way connector are respectively connected to the output end of the solenoid valve, one output end of the second two-position three-way directional valve (i.e., the output end of the second two-position three-way directional valve that is not connected to the input end of the moving valve), the output end of the manual valve, and the input end of the gas flow meter via the pipeline. The ends of the automatic oxygen supply system or the manual oxygen supply system are connected in parallel, and the transmitted oxygen is measured by the gas flow meter and introduced into the patient's nasal cavity to achieve precise monitoring of the oxygen supply.

[0032] In this embodiment, the input end of the input tube is connected to an oxygen cylinder 14 via a pressure reducing valve 13. When the pressure reducing valve is working, it can control the air pressure of the ventilator system, thereby playing a role in airway pressure regulation and safety protection, ensuring that the ventilator can work safely and effectively.

[0033] In this embodiment, the oxygen delivery pipeline system further includes a housing 15. A horizontal partition 16 is installed inside the housing via a limiting block. The horizontal partition divides the housing into upper and lower layers. The first two-position three-way reversing valve is installed on the horizontal partition. The throttle valve and the solenoid valve are respectively installed on the horizontal partition and on the left and right sides of the first two-position three-way reversing valve. The second two-position three-way reversing valve is installed on the horizontal partition and on the rear side of the solenoid valve. The manual valve is installed on the horizontal partition and on the rear side of the first two-position three-way reversing valve.

[0034] In this embodiment, the partition plate is provided with mounting slots corresponding to the first two-position three-way reversing valve, the solenoid valve, the second two-position three-way reversing valve, the manual valve, and the throttle valve. Each mounting slot is composed of corner limiting plates located at the four corners, forming a mounting area. The first two-position three-way reversing valve, the solenoid valve, the second two-position three-way reversing valve, the manual valve, and the throttle valve are respectively installed in their corresponding mounting areas. The electronic control components are mounted on the bottom plate inside the housing, dividing the ventilator into two layers of space. This design divides the ventilator space and rationally arranges the components, thereby reducing the ventilator's volume and consumables, making it compact and portable.

[0035] In this embodiment, the electronic control components include a power supply 17, a relay 18, a toggle switch 19, and a circuit board 20, all electrically connected to each other. The circuit board is electrically connected to a gear selector knob. The power supply is a conventional multi-voltage output power supply. Specifically, the circuit board uses an STM32F103ZET core board and employs a four-gear knob 21 and an eight-gear knob 22 for control. The STM32 core board's input pins PE1-PE8 are connected to pins 1-8 of the eight-gear knob, and its GND pin is connected to pin 9 of the eight-gear knob. Interrupt mode, triggered by a rising edge, enables interrupt settings for different cycle control. The STM32 core board's input pins PE9-PE12 are connected to pins 1-4 of the four-gear knob, and its GND pin is connected to pin 5 of the eight-gear knob. Interrupt mode, triggered by a rising edge, enables interrupt settings for different cycle control. Periodic control; the VCC pin of the relay is connected to the K2-2 pin of the relay, the K2-2 pin of the relay is connected to the positive pin of the solenoid valve, and the GND pin of the relay is connected to the negative pin of the solenoid valve. Through push-pull output, the solenoid valve is opened and closed by cyclic setting and reset; the PA2 pin of the STM32 core board is connected to the Y1 pin of the relay, the GND pin of the STM32 core board is connected to the on pin of the manual switch, the off pin of the manual switch is connected to the Y3 pin of the relay, the 5V power supply output is connected to the STM32 core board, and the 5V power supply output is connected to the relay. Through the relay, the high voltage (24V) switch can be controlled by the low voltage (5V) control signal. Of course, other existing circuit control components can also be used to control the solenoid valve. The power supply, relay, and circuit board are installed on the bottom plate inside the casing, and the gear knob and manual switch are installed on the horizontal partition for easy control.

[0036] A method for using a medical ventilator:

[0037] S1 Automatic Oxygen Supply Mode: When the automatic oxygen supply mode is selected as needed, the throttle valve is opened. At this time, the input terminal of the automatic oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, and the input terminal of the manual oxygen supply system on the first two-position three-way reversing valve is closed. The solenoid valve is opened and closed intermittently under the control of the electronic control component, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, solenoid valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence.

[0038] By adjusting the gear knob, the opening and closing of the solenoid valve can be controlled accordingly, thereby achieving control of different breathing ratios and cycles. At the same time, the gas flow meter detects whether the flow rate is within the approved range. If there is a deviation, the flow rate can be controlled by adjusting the throttle valve.

[0039] S2 Normal Oxygen Supply Mode: When the normal oxygen supply mode is selected as needed, the throttle valve is opened. At this time, the input end of the manual oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, and the input end of the automatic oxygen supply system on the first two-position three-way reversing valve is closed. The output end of the first two-position three-way reversing valve on the second two-position three-way reversing valve is connected to the four-way connector, and the input end of the manual valve is closed, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, second two-position three-way reversing valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence.

[0040] S3 Manual Intermittent Oxygen Supply Mode: When manual intermittent oxygen supply is selected as needed, the throttle valve is opened. At this time, the input terminal of the manual oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, and the input terminal of the automatic oxygen supply system on the first two-position three-way reversing valve is closed. The output terminal of the first two-position three-way reversing valve on the second two-position three-way reversing valve is connected to the input terminal of the manual valve, and the output port of the second two-position three-way reversing valve connected to the four-way connector is closed, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, second two-position three-way reversing valve, manual valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence. At the same time, the gas circuit is controlled by manually pressing the manual valve.

[0041] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0042] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0043] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0044] Furthermore, the orientations or positional relationships used in any of the technical solutions disclosed in this invention above to indicate positional relationships, such as "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent. In addition, unless otherwise stated, the terms used to indicate shape in any of the technical solutions disclosed in this invention above include shapes that are similar to, close to, or approximate with it.

[0045] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method of using a medical ventilator, characterized in that: S1 Automatic Oxygen Supply Mode: When the throttle valve is opened, the input terminal of the automatic oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, and the input terminal of the manual oxygen supply system on the first two-position three-way reversing valve is closed. The solenoid valve is intermittently opened and closed under the control of the electronic control component, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, solenoid valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence. S2 Normal Oxygen Supply Mode: When the throttle valve is opened, the input end of the manual oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, the input end of the automatic oxygen supply system on the first two-position three-way reversing valve is closed, the output end of the first two-position three-way reversing valve on the second two-position three-way reversing valve is connected to the four-way connector, and the input end of the manual valve is closed, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, second two-position three-way reversing valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence. S3 Manual Intermittent Oxygen Supply Mode: When the throttle valve is opened, the input terminal of the manual oxygen supply system on the first two-position three-way reversing valve is connected to the input pipe, the input terminal of the automatic oxygen supply system on the first two-position three-way reversing valve is closed, the output terminal of the first two-position three-way reversing valve on the second two-position three-way reversing valve is connected to the input terminal of the manual valve, and the output port on the second two-position three-way reversing valve connected to the four-way connector is closed, so that oxygen is output from the oxygen cylinder and passes through the pressure reducing valve, throttle valve, first two-position three-way reversing valve, second two-position three-way reversing valve, manual valve, four-way connector, gas flow meter, and oxygen delivery pipe in sequence. A medical ventilator includes an oxygen delivery pipeline system, which comprises a first two-position three-way reversing valve, an automatic oxygen supply system, and a manual oxygen supply system. The input port of the first two-position three-way reversing valve is connected to an input pipe with a throttle valve. The two output ports of the first two-position three-way reversing valve are respectively connected to the input terminals of the automatic oxygen supply system and the manual oxygen supply system. The output terminals of the automatic oxygen supply system and the manual oxygen supply system are connected to a gas flow meter via parallel pipelines. An oxygen delivery pipe is connected to the output terminal of the gas flow meter. The automatic oxygen supply system includes a solenoid valve and an electronic control component for controlling the on / off state of the solenoid valve. The input end of the solenoid valve is connected to one of the output ports of a first two-position three-way directional valve via a pipeline, and the output end of the solenoid valve is connected to the input end of a gas flow meter via a parallel pipeline. The manual oxygen supply system includes a second two-position three-way reversing valve and a manual valve. The input end of the second two-position three-way reversing valve is connected to one of the output ports of the first two-position three-way reversing valve via a pipeline. One of the output ends of the second two-position three-way reversing valve is connected to the input end of a gas flow meter via a parallel pipeline. The other output end of the second two-position three-way reversing valve is connected to the input end of the manual valve via a pipeline. The output end of the manual valve is connected to the input end of the gas flow meter via a parallel pipeline. The parallel pipeline is a four-way connector, and the four ports of the four-way connector are respectively connected to the output end of the solenoid valve, one of the output ends of the second two-position three-way directional valve, the output end of the manual valve, and the input end of the gas flow meter via the pipeline. The input end of the input tube is connected to an oxygen cylinder via a pressure reducing valve; The oxygen delivery pipeline system also includes a housing, inside which a horizontal partition is installed via a limiting block. The horizontal partition divides the housing into upper and lower layers. The first two-position three-way reversing valve is installed on the horizontal partition. The throttle valve and the solenoid valve are respectively installed on the horizontal partition and on the left and right sides of the first two-position three-way reversing valve. The second two-position three-way reversing valve is installed on the horizontal partition and on the rear side of the solenoid valve. The manual valve is installed on the horizontal partition and on the rear side of the first two-position three-way reversing valve. The horizontal partition is provided with mounting slots corresponding to the first two-position three-way reversing valve, the solenoid valve, the second two-position three-way reversing valve, the manual valve, and the throttle valve. The electronic control assembly includes a power supply, a relay, a toggle switch, and a circuit board that are electrically connected to each other. A position knob is electrically connected to the circuit board. The electronic control assembly is mounted on the bottom plate inside the housing.

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