Portable breathing machine system

Abstract

The utility model provides a portable breathing machine system, which is characterized in that a main pipeline is arranged in a shell, the main pipeline is sequentially divided into an air pipeline, a bent pipeline and an air conveying pipeline according to the air flow direction, the air pipeline and the air conveying pipeline are positioned on the same side of the bent pipeline, and a turbofan and a second flow meter are sequentially arranged on the air pipeline; an oxygen concentration sensor and a third flow meter are arranged on the gas conveying pipeline; the gas inlet end of the oxygen pipeline is connected with an oxygen source, the gas outlet end of the oxygen pipeline is communicated with the main pipeline, the communication position is located between the second flow meter and the length midpoint of the bent pipeline, and an oxygen pressure sensor, a proportional valve and a first flow meter are arranged on the oxygen pipeline; and the control main board is electrically connected with the oxygen pressure sensor, the oxygen concentration sensor, the first flowmeter, the second flowmeter, the third flowmeter, the proportional valve and the turbine fan. A mixing cavity in a traditional breathing machine system is abandoned, the size of the breathing machine system is reduced, the breathing loop resistance of a user is reduced, and breathing is easier.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical technology field especially, it relates to a portable breathing machine system. BACKGROUND

[0002] The breathing machine system has been generally used in respiratory failure caused by various reasons, anesthesia breathing management during major operation, respiratory support treatment and emergency resuscitation. The breathing machine system generally has two kinds of gas sources, one is oxygen, and the other is air, and the mixture of oxygen and air is controlled to form a breathing gas meeting the medical standard, and the breathing gas is delivered to the patient.

[0003] There are a large number of breathing machine schemes in the prior art. For example, the Chinese patent with publication number CN117959553A discloses a breathing machine automatic air supplement device and method, which provides a breathing machine automatic air supplement device including an oxygen supply unit, an air supply unit and a gas mixing unit. The gas mixing unit further includes an inner mixing chamber and a piston movably arranged in the inner mixing chamber. The combination of compression mixing and stirring mixing improves the mixing efficiency. The piston needs to be arranged in the inner mixing chamber, which has a large volume. For another example, the Chinese patent with publication number CN220513238U discloses an electrically controlled breathing machine, which includes a high-pressure oxygen branch, a low-pressure air branch and an air inlet gas path. The air inlet end of the high-pressure oxygen branch is connected to a high-pressure oxygen source. The low-pressure air branch is connected to a low-pressure air source. The air inlet gas path includes an air-oxygen mixing chamber. The air inlet ends of the air-oxygen mixing chamber are respectively connected to the air outlet ends of the high-pressure oxygen branch and the low-pressure air branch. The air outlet end of the air-oxygen mixing chamber is connected to the air inlet gas path. The patent also provides an air-oxygen mixing chamber.

[0004] It can be seen that the breathing machine system in the prior art usually has a mixing chamber for fully mixing oxygen and air. The mixing chamber occupies a large space. However, with the increasing demand for household breathing machines, it is required that the breathing machine system has a smaller volume to facilitate carrying. In addition, the mixing chamber has a gas storage function, which may increase the respiratory resistance of patients. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the technical problems that the breathing machine system has a large volume due to the mixing chamber of oxygen and air in the prior art, is not convenient to carry, and the mixing chamber may increase the respiratory resistance of patients, and provides a portable breathing machine system. The traditional mixing chamber is removed, the volume of the breathing machine system is greatly reduced, it is convenient to carry, and users can breathe more easily.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a kind of portable breathing machine system, including shell, be provided with in the shell: main pipeline, it is divided into air pipe, curved pipe and gas delivery pipe in turn according to gas flow direction, air pipe and gas delivery pipe are located the same side of curved pipe, turbine fan and second flowmeter are sequentially arranged on air pipe, and oxygen concentration sensor and third flowmeter are arranged on gas delivery pipe;Oxygen pipeline, the gas inlet end of oxygen pipeline is connected with oxygen source, the gas outlet end of oxygen pipeline is communicated with main pipeline, and the communication place is between second flowmeter and the length midpoint of curved pipe, and oxygen pressure sensor, proportional valve and first flowmeter are arranged on oxygen pipeline;Control mainboard is electrically connected with oxygen pressure sensor, oxygen concentration sensor, first flowmeter, second flowmeter, third flowmeter, proportional valve and turbine fan respectively.

[0007] The above technical solution: under the action of turbine fan on air pipe, external environment air is inhaled into air pipe, oxygen in oxygen source enters main pipeline (from the main pipeline between second flowmeter and the length midpoint of curved pipe) under the control of proportional valve, and after being mixed with the air entering air pipe in curved pipeline, it is output to user, and the mixing chamber of traditional breathing machine system is discarded, and mixing is realized in main pipeline, to improve the mixing degree of two gases, curved pipe is arranged to slow down the flow rate of two gases, to realize sufficient mixing, air pipe and gas delivery pipe are located the same side of curved pipe, so that main pipeline presents U type, C type and the like, can further reduce the volume of breathing machine system, simultaneously, after removing mixing chamber, gas path structure is simplified, can reduce gas path dead space, reduce airway obstruction, reduce user breathing circuit resistance, make its breathing more relaxed, and it is also convenient for cleaning and disinfection;In addition, control mainboard monitors input oxygen pressure by oxygen pressure sensor, monitors the flow of oxygen, air and oxygen-air mixed gas by first flowmeter, second flowmeter and third flowmeter respectively, and monitors oxygen concentration in mixed gas by oxygen concentration sensor, to adjust the opening of proportional valve and the rotating speed of turbine fan with these information, to obtain mixed gas meeting medical standard, to ensure the reliable operation of breathing machine system.

[0008] In a preferred embodiment of the utility model, the curved pipe is arc-shaped or C-shaped.

[0009] The above technical solution: convenient for processing, so that main pipeline is U-shaped or C-shaped as a whole, more convenient for reducing the occupied space of breathing machine system.

[0010] In a preferred embodiment of the utility model, further including humidifying device and user pipe, the humidifying device is used to deliver the gas in gas delivery pipe to humidifying device for humidification and then deliver into user pipe.

[0011] The above technical solution: increase the humidity of oxygen-air mixed gas, improve user use comfort.

[0012] In a preferred embodiment of the utility model, the humidifying device comprises a heating disc and a humidifying tank placed on the heating disc, the air inlet of the humidifying tank is communicated with the air outlet end of the gas conveying pipeline, and the air outlet of the humidifying tank is communicated with the air inlet end of the user pipeline.

[0013] The above technical scheme can humidify and heat the mixed gas of oxygen and air, and further improve the comfort of the user.

[0014] In a preferred embodiment of the utility model, the heating disc is internally provided with an electric heating wire, the first temperature sensor and the second temperature sensor are installed inside the heating disc, and the first temperature sensor and the second temperature sensor are respectively electrically connected with the control mainboard.

[0015] The above technical scheme adopts the electric heating wire to heat, is low in cost and convenient to control, two temperature sensors are arranged to simultaneously monitor the working temperature of the electric heating wire, and the reliability of the over-temperature protection can be improved.

[0016] In a preferred embodiment of the utility model, the control mainboard comprises a controller and a heating control circuit, the heating control circuit comprises a comparator, a first switching unit, a second switching unit and a third switching unit, the output end of the first temperature sensor is connected with the negative input end of the comparator, the positive input end of the comparator is connected with a reference voltage end, the output end of the comparator is connected with the control end of the first switching unit, the first end of the first switching unit is connected with the first signal end of the controller, the second end of the first switching unit is connected with the control end of the second switching unit, the first end of the second switching unit is connected with an alternating current ground, the second end of the second switching unit is connected with the first end of the third switching unit, the second end of the heating wire is connected with an alternating current power supply, the control end of the third switching unit is connected with the PWM signal end of the controller, and the output end of the second temperature sensor is connected with the second signal end of the controller.

[0017] The above technical scheme: the heating control circuit utilizes the signal output by the first temperature sensor to carry out hardware temperature protection, when the signal output by the first temperature sensor is greater than a preset reference power supply signal, the first switching circuit and the second switching circuit are open circuit, the power supply loop of the electric heating wire is disconnected, the electric heating wire stops working, and thus over-temperature protection is realized; the second temperature sensor is directly electrically connected with the controller, the controller can monitor the heating temperature in real time, when the electric heating wire works, the PWM signal output end of the controller outputs a PWM signal, the duty ratio of the PWM signal is adjusted, the closing and opening time ratio of the third switching circuit is adjusted, and thus the heating temperature is regulated, and the temperature detection reliability can be improved by arranging two temperature sensors.

[0018] In an optimal embodiment of the utility model, a third temperature sensor is further arranged on the user pipeline, and the third temperature sensor is electrically connected with the control mainboard.

[0019] The technical scheme above: the third temperature sensor is used to monitor the temperature of the mixed gas inhaled by the user in real time, so that the controller can timely adjust the temperature of the mixed gas.

[0020] In an optimal embodiment of the utility model, a safety branch is connected to the oxygen pipeline, one end of the safety branch away from the oxygen pipeline is connected with ambient air, and a safety valve is arranged on the safety branch.

[0021] The technical scheme above: the safety of the oxygen pipeline is improved.

[0022] In an optimal embodiment of the utility model, a first one-way valve is further arranged in the gas pipeline; and / or, a second one-way valve is arranged on the air pipeline.

[0023] The technical scheme above: the first one-way valve is used to prevent the mixed gas from flowing backward, the second one-way valve is used to prevent the air from flowing backward, and the safety and reliability of the breathing machine system are improved.

[0024] In an optimal embodiment of the utility model, an ambient pressure sensor is further arranged in the shell, the ambient pressure sensor is electrically connected with the control mainboard; and / or, a first filter is further arranged near the air inlet end of the air pipeline, and a second filter is further arranged near the air inlet end of the oxygen pipeline.

[0025] The technical scheme above: the ambient pressure sensor is used to facilitate the controller to learn the external ambient air pressure in real time and adjust the flow of the mixed gas according to the ambient air pressure, so as to maintain the pressure difference with the patient's lung and ensure effective gas exchange. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the gas circuit structure of the portable breathing machine system in an optimal embodiment of the utility model;

[0027] Figure 2 is a schematic diagram of the structure of the main pipeline and the oxygen pipeline in an optimal embodiment of the utility model;

[0028] Figure 3 is a schematic diagram of the first honeycomb mixing unit / second honeycomb mixing unit in an optimal embodiment of the utility model;

[0029] Figure 4 is a system block diagram of the portable breathing machine system in an optimal embodiment of the utility model;

[0030] Figure 5 is a schematic diagram of the heating control circuit structure in an optimal embodiment of the utility model;

[0031] 100 air pipe; 101 first filter; 102 turbo fan; 103 second flow meter; 104 second check valve; 200 curved pipe; 201 second honeycomb mixing unit; 300 gas delivery pipe; 301 oxygen concentration sensor; 302 third flow meter; 303 first check valve; 400 oxygen pipe; 401 second filter; 402 oxygen pressure sensor; 403 proportional valve; 404 first honeycomb mixing unit; 405 first flow meter; 500 safety branch; 501 safety valve; 600 user pipe; 601 third temperature sensor; 701 humidification tank; 702 heating disc; 703 second temperature sensor; 704 first temperature sensor; 705 ambient pressure sensor. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034] In the description of the present application, unless otherwise specified and limited, it should be noted that the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, or indirect connection through intermediate medium, and those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The present application provides a kind of portable breathing machine system, its air path structure schematic diagram refers to Figure 1 、 Figure 4 As shown in the drawing, including shell (not shown), shell is provided with in:

[0036] The main pipeline is divided into an air pipeline 100, a curved pipeline 200, and a gas delivery pipeline 300 according to the gas flow direction (i.e., the gas flow direction in the main pipeline when the ventilator system is working). The air pipeline 100 and the gas delivery pipeline 300 are located on the same side of the curved pipeline 200. A turbine fan 102 and a second flow meter 103 are installed on the air pipeline 100 in sequence. An oxygen concentration sensor 301 and a third flow meter 302 are installed on the gas delivery pipeline 300.

[0037] Oxygen pipeline 400, the inlet end of oxygen pipeline 400 is connected to an oxygen source, the outlet end of oxygen pipeline 400 is connected to the main pipeline, and the connection point is located between the second flow meter 103 and the midpoint of the length of the bend pipe 200. Oxygen pressure sensor 402, proportional valve 403 and first flow meter 405 are installed on oxygen pipeline 400.

[0038] The control motherboard is electrically connected to the oxygen pressure sensor 402, the oxygen concentration sensor 301, the first flow meter 405, the second flow meter 103, the third flow meter 302, the proportional valve 403, and the turbine fan 102, respectively.

[0039] In this embodiment, the shape of the curved conduit 200 is preferably, but not limited to, an arc shape (see reference). Figure 2 (As shown) or a C-shape, "]" shape, S-shape, or other irregular curve. The bend in the conduit 200 facilitates the extension of the gas supply conduit 300 back towards the air inlet of the air conduit 100, ensuring that the air conduit 100 and the gas supply conduit 300 are located on the same side of the bend in the conduit 200 (see reference). Figure 2 As shown, this design reduces the space occupied by the ventilator system. Furthermore, by bending the tubing 200, the gas flow rate within the tubing is slowed, ensuring thorough mixing of oxygen and air. Preferably, the air tubing 100 and the gas delivery tubing 300 are as parallel as possible to effectively reduce the space occupied by the ventilator system. The main tubing can be integrally formed or assembled in sections. Both the main tubing and the oxygen tubing 400 can be made of plastic. The oxygen tubing 400 can be connected to the main tubing via a tee fitting.

[0040] In the embodiment, the second flow meter 103, the second flow meter 103, and the third flow meter 302 are all selected from existing gas flow meter products for respirators, such as AFM3000 series or FS1015CL of Osram Electronics or MF5706 and MF5712 of Silian Electronics. The oxygen concentration sensor 301 is selected from a respirator-specific oxygen concentration sensor, such as ITG M-03 of Germany. The oxygen pressure sensor 402 is selected from a respirator-specific gas pressure sensor, such as XGZP6897A, SM5652, SM9541, etc. The proportional valve 403 can be an electromagnetic proportional valve, and existing products can be selected, such as SMC ITV2050-312N, AEORHC 8010, etc. The turbo fan 102 can be selected from the structure of a turbo fan on an existing respirator, such as that disclosed in the existing patent with publication number CN220513238U, or the ultra-silent turbo fan with model number C68SS1 from Beifeng Technology, which will not be described here.

[0041] In the embodiment, the control mainboard is a circuit board carrying a controller and its related peripheral circuits, as well as a fan drive chip and its peripheral circuits. The controller is preferably but not limited to a single-chip microcomputer, ARM microprocessor, etc., such as model STM32F407. The fan drive chip is preferably but not limited to MLX80153, PY32MD310, etc., which is connected in communication with the controller and drives the turbo fan to work under the control of the controller. The specific process can be found in the chip manual and is not within the protection scope of the utility model, which will not be described here. The signal output end of the fan drive chip is connected with the electric control end of the turbo fan to transmit motor control signals.

[0042] In the embodiment, the controller in the control mainboard monitors the input oxygen pressure according to the oxygen pressure sensor 402, monitors the flow of oxygen, air, and mixed gas of oxygen and air through the first flow meter 405, the second flow meter 103, and the third flow meter 302 respectively, and monitors the oxygen concentration in the mixed gas through the oxygen concentration sensor 301. These information is used to adjust the opening of the proportional valve 403 and the rotating speed of the turbo fan 102 to obtain mixed gas meeting medical standards. The methods involved in the process are all existing technologies, such as the technical solution disclosed in the patent with publication number CN116139377A of the applicant's prior application, which is not within the protection scope of the utility model, and will not be described here.

[0043] In the present embodiment, the portable breathing machine system provided by the utility model discloses the traditional mixed cavity structure is given up, and a curved flow channel 200 is used to replace the mixed cavity, the oxygen pipeline 400 is communicated between the second flow meter 103 of the air pipeline 100 and the length midpoint of the curved pipeline 200, and the specific communication position is located after the second flow meter 103 of the air pipeline 100 and before the length midpoint of the curved pipeline 200, and the part after the length midpoint of the curved pipeline 200 is used to ensure that oxygen and air are effectively mixed.The gas path structure composed of the main pipeline and the oxygen pipeline 400 has the following advantages:

[0044] 1. Reduce dead space: It helps to reduce the dead space in the breathing machine circuit, which can reduce the dead space that the patient needs to overcome with each breath, thereby improving the breathing efficiency.

[0045] 2. Improve gas exchange: Because the gas path can reduce the dead space, the exchange of oxygen and carbon dioxide can be improved, which is particularly important for patients who need long-term mechanical ventilation.

[0046] 3. Reduce airway resistance: The gas path can reduce the resistance of the breathing machine circuit, making the patient's breathing more comfortable and reducing the burden on the respiratory muscles.

[0047] 4. Easy to clean and disinfect: The design of the gas path usually makes it easier to disassemble and clean the components of the breathing machine, which is very important for preventing ventilator-associated pneumonia (VAP).

[0048] 5. Reduce airway obstruction: The design of the gas path helps to reduce the occurrence of airway obstruction, which may be due to the structure of the gas path, which makes it difficult for secretions and foreign matter to accumulate in the airway.

[0049] In a preferred embodiment, the portable breathing machine system provided by the utility model further comprises a humidification device and a user pipeline 600, the humidification device is used to deliver the gas in the gas delivery pipeline 300 to the humidification device for humidification, and then deliver the humidified mixed gas into the user pipeline 600. The humidification device can be located inside or outside the shell; it can also be partially located inside the shell and partially located outside the shell (as shown in the figure). The user pipeline 600 directly delivers the humidified mixed gas to the user, and is not limited to a plastic nasal cannula. When the humidification device is located outside the shell, it can be an existing humidifier product. Figure 1

[0050] In the present embodiment, in order to further reduce the volume of the breathing machine system, facilitate humidification of the mixed gas, and ensure the electrical safety of the circuit board of the breathing machine system, preferably, referring to Figure 1 ​As shown, the humidifying device comprises a heating disc 702 and a humidifying tank 701 placed on the heating disc. A space area is exposed on the bottom plate of the shell as a humidifying device installation area. The heating disc 702 can be built-in or embedded on the bottom plate of the humidifying device installation area. In this way, the humidifying tank 701 is located outside the shell, avoiding affecting the work of electronic components. The air inlet of the humidifying tank 701 is in communication with the air outlet end of the air conveying pipeline 300. The air outlet of the humidifying tank 701 is in communication with the air inlet end of the user pipeline 600. The humidifying tank 701 is not limited to containing sterile distilled water. The humidifying tank 701 can be a transparent glass or plastic tank, which is provided with two interfaces, one as an air inlet and the other as an air outlet. The two interfaces are in communication with the air outlet end of the air conveying pipeline 300 and the air inlet end of the user pipeline 600, respectively.

[0051] In the embodiment, to ensure heating safety, it is further preferred that the heating disc 702 is provided with an electric heating wire. The heating disc 702 is internally provided with a first temperature sensor 704 and a second temperature sensor 703. The first temperature sensor 704 and the second temperature sensor 703 are electrically connected with the control main board, respectively. The first temperature sensor 704 and the second temperature sensor 703 can both be NTC thermistors, which are small in size and easy to install. The two can be embedded in the heating disc 702, preferably close to the heating wire of the heating disc. At least one of the first temperature sensor 704 and the second temperature sensor 703 is connected with the signal pin of the controller on the control main board.

[0052] In a preferred embodiment, to perform reliable over-temperature protection, the control main board comprises a heating control circuit. Referring to Figure 5 As shown, the heating control circuit comprises a comparator, a first switching unit, a second switching unit and a third switching unit.

[0053] The output end of the first temperature sensor 704 is connected with the negative input end of the comparator. The positive input end of the comparator is connected with the reference voltage end. The output end of the comparator is connected with the control end of the first switching unit. The first end of the first switching unit is connected with the first signal end of the controller. The second end of the first switching unit is connected with the control end of the second switching unit. The first end of the second switching unit is connected with the alternating current ground. The second end of the second switching unit is connected with the first end of the third switching unit. The second end of the third switching unit is connected with the first end of the heating wire. The second end of the heating wire is connected with the alternating current power supply. The control end of the third switching unit is connected with the PWM signal end of the controller.

[0054] The output end of the second temperature sensor 703 is connected with the second signal end of the controller.

[0055] In the embodiment, the model of the comparator is preferably but not limited to MCP6547, AD96685, the first switch unit is preferably but not limited to an existing MOS switch tube circuit or a relay. The second switch unit is preferably but not limited to an existing mechanical relay product, and the third switch unit is preferably but not limited to an existing solid-state relay product. The reference voltage terminal is a direct current voltage source, the voltage value of the reference voltage terminal is greater than or equal to the voltage value output by the first temperature sensor 704 when the maximum temperature threshold of the preset heating wire, and the direct current voltage source can be obtained by using a direct current reference chip circuit or a direct current reference chip output voltage division, which are both prior art and will not be described here. The controller is integrated with a PWM module, and the PWM signal end outputs a PWM wave.

[0056] In the embodiment, when the heating wire temperature is too high, so that the voltage output by the first temperature sensor 704 is greater than or equal to the reference voltage terminal, the comparator outputs a low-level signal, the first switch unit is turned off, then the second switch unit is turned off, the power supply circuit of the heating wire is cut off, and the hardware over-temperature protection is realized. When the voltage output by the first temperature sensor 704 is less than the reference voltage terminal, the comparator outputs a high-level signal, the first switch unit is turned on, the high-level signal output by the first signal end of the controller controls the second switch unit to be turned on, the heating wire power supply circuit is turned on, the PWM signal end of the controller outputs a PWM signal to the control end of the third switch unit, the proportion of the off and on of the third switch unit is modulated, so that the size of the heating wire power supply current is modulated, and the heating temperature adjustment of the humidifying device is realized.

[0057] In a preferred embodiment, referring to Figure 1 It is shown that the third temperature sensor 601 is further arranged on the user pipeline 600 and electrically connected with the control mainboard, and specifically connected with the signal end of the controller on the control mainboard.

[0058] In a preferred embodiment, referring to Figure 2 It is shown that the first honeycomb mixing unit 404 is further arranged after the proportional valve 403 in the oxygen pipeline 400, and the second honeycomb mixing unit 201 is arranged in the curved pipeline 200. The structures of the first honeycomb mixing unit 404 and the second honeycomb mixing unit 201 are shown in Figure 3 It is shown that the first honeycomb mixing unit 404 and the second honeycomb mixing unit 201 are in a honeycomb porous shape, the first honeycomb mixing unit 404 can slow down the oxygen flow rate and increase the uniformity of the oxygen distribution in the pipeline, and the second honeycomb mixing unit 201 can enhance the uniformity of the mixing of the oxygen and the air.

[0059] In a preferred embodiment, as Figure 1 It is shown that the safety branch 500 is connected to the oxygen pipeline 400, the end of the safety branch 500 away from the oxygen pipeline 400 is connected with the ambient air, and the safety valve 501 is arranged on the safety branch 500.

[0060] In a preferred embodiment, the gas supply pipeline 300 is further provided with a first one-way valve 303; and / or, the air pipeline 100 is provided with a second one-way valve 104.

[0061] In the embodiment, specifically, the first one-way valve 303 can be arranged at the gas outlet end of the gas supply pipeline 300 to prevent the mixed gas from flowing backward. The second one-way valve 104 is arranged at the gas outlet end of the air pipeline 100 to prevent the mixed gas from flowing backward to the air, which can reduce the noise.

[0062] In a preferred embodiment, as shown in Figure 1 The housing is further provided with an ambient pressure sensor 705, and the ambient pressure sensor 705 is electrically connected with the control mainboard; and / or, the first filter 101 is arranged near the air inlet end of the air pipeline 100, and the second filter 401 is arranged near the air inlet end of the oxygen pipeline 400.

[0063] In the embodiment, the ambient pressure sensor 705 is arranged inside the housing to sense the ambient air pressure. The gas pressure sensor dedicated for the breathing machine can be selected, such as the model XGZP6897A, SM5652, SM9541, etc.

[0064] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A portable ventilator system, characterized by, The shell is internally provided with: A main pipeline is sequentially divided into an air pipeline (100), a curved pipeline (200) and a gas delivery pipeline (300) in the direction of gas flow, the air pipeline (100) and the gas delivery pipeline (300) are located on the same side of the curved pipeline (200), the air pipeline (100) is sequentially provided with a turbine fan (102) and a second flow meter (103), and the gas delivery pipeline (300) is provided with an oxygen concentration sensor (301) and a third flow meter (302); An oxygen pipeline (400) is connected with an oxygen source at an air inlet end, and is communicated with the main pipeline at an air outlet end, and the communication position is located between the second flow meter (103) and the length midpoint of the curved pipeline (200), and the oxygen pipeline (400) is provided with an oxygen pressure sensor (402), a proportional valve (403) and a first flow meter (405); A control mainboard is electrically connected with the oxygen pressure sensor (402), the oxygen concentration sensor (301), the first flow meter (405), the second flow meter (103), the third flow meter (302), the proportional valve (403) and the turbine fan (102) respectively.

2. A portable respirator system as defined in claim 1, wherein, The curved pipeline (200) is arc-shaped or C-shaped.

3. A portable respirator system as claimed in claim 1 or 2, characterized in that A humidifying device and a user pipeline (600) are further included, the humidifying device is used for humidifying the gas in the gas delivery pipeline (300) and then delivering the humidified gas into the user pipeline (600).

4. A portable respirator system as defined in claim 3, wherein, The humidifying device includes a heating disc (702) and a humidifying tank (701) placed on the heating disc, an air inlet of the humidifying tank (701) is communicated with an air outlet end of the gas delivery pipeline (300), and an air outlet of the humidifying tank (701) is communicated with an air inlet end of the user pipeline (600).

5. A portable respirator system as defined in claim 4, wherein, The heating disc (702) is internally provided with an electric heating wire, the heating disc (702) is internally provided with a first temperature sensor (704) and a second temperature sensor (703), and the first temperature sensor (704) and the second temperature sensor (703) are electrically connected with the control mainboard respectively.

6. A portable respirator system as defined in claim 5, wherein, The control mainboard includes a controller and a heating control circuit; The heating control circuit includes a comparator, a first switching unit, a second switching unit and a third switching unit; An output end of the first temperature sensor (704) is connected with a negative input end of the comparator, a positive input end of the comparator is connected with a reference voltage end, an output end of the comparator is connected with a control end of the first switching unit, a first end of the first switching unit is connected with a first signal end of the controller, a second end of the first switching unit is connected with a control end of the second switching unit, a first end of the second switching unit is connected with an alternating current ground, a second end of the second switching unit is connected with a first end of the third switching unit, a second end of the third switching unit is connected with a first end of the heating wire, a second end of the heating wire is connected with an alternating current power supply, and a control end of the third switching unit is connected with a PWM signal end of the controller; An output end of the second temperature sensor (703) is connected with a second signal end of the controller.

7. A portable respirator system as claimed in claim 4 or 5 or 6, wherein, A third temperature sensor (601) is further arranged on the user pipeline (600) and is electrically connected with the control mainboard.

8. The portable respirator system of claim 1 or 2 or 4 or 5 or 6, wherein, The safety branch (500) is connected to the oxygen pipeline (400), one end of the safety branch (500) is connected to the ambient air, and a safety valve (501) is arranged on the safety branch (500).

9. A portable respirator system as defined in claim 8, wherein, The first one-way valve (303) is further arranged in the gas pipeline (300); and / or the second one-way valve (104) is arranged on the air pipeline (100).

10. The portable respirator system of claim 8, wherein, An ambient pressure sensor (705) is further arranged in the shell and electrically connected with the control mainboard; And / or, a first filter (101) is further arranged near the air inlet end of the air pipeline (100), and a second filter (401) is further arranged near the air inlet end of the oxygen pipeline (400).

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