Breathing machine control circuit and breathing machine equipment

Abstract

The utility model relates to the technical field of electronic control, in particular to a breathing machine control circuit and breathing machine equipment. The breathing machine control circuit comprises the main control board and the sensor control board, the sensor control board is added between the sensor and the main control board, and the sensor control board can optimize and fuse original signals received from the sensor and transmit the optimized signals to the main control board. According to the breathing machine control circuit, storage and transportation of sensor signals are optimized, the function and the application range of the breathing machine system are expanded, the working efficiency of the main control board is greatly improved, and the reliability and the stability of the breathing machine system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control, in particular to a ventilator control circuit and ventilator equipment. Background Art

[0002] A ventilator is a medical device that can assist or control a person's normal physiological breathing, increase lung ventilation, and improve respiratory function. In modern medicine, ventilators have been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy, and emergency resuscitation.

[0003] In the prior art, the data transmission of sensors in the ventilator system is directly controlled by the main control board in the ventilator. This control method will increase the workload of the main control board in the ventilator, affect the processing speed of the main control board, and reduce the working efficiency of the main control board. Utility Model Content

[0004] The embodiments of the utility model provide a ventilator control circuit and a ventilator device to solve the problem in the prior art that the data transmission of the sensor in the ventilator system is directly controlled by the main control board, which affects the processing speed of the main control board and reduces the working efficiency of the main control board.

[0005] In the first aspect, the utility model provides a ventilator control circuit, comprising: a main control board and a sensor control board, wherein the first input end of the sensor control board is connected to a pressure sensor, the second input end of the sensor control board is connected to an oxygen concentration sensor, the output end of the sensor control board is connected to the first input end of the main control board, and the sensor control board is used to obtain the pressure signal output by the pressure sensor and the oxygen concentration signal output by the oxygen concentration sensor, and forward the pressure signal and the oxygen concentration signal to the main control board.

[0006] In one embodiment, the third input terminal of the sensor control board is connected to the blood oxygen concentration detection module, and the sensor control board is also used to obtain the blood oxygen concentration signal of the blood oxygen concentration detection module and forward the blood oxygen concentration signal to the main control board.

[0007] In one embodiment, the fourth input terminal of the sensor control board is connected to the body temperature detection module, and the sensor control board is also used to obtain the body temperature signal of the body temperature detection module and forward the body temperature signal to the main control board.

[0008] In one embodiment, the sensor control board includes: a first control chip, a first crystal oscillator circuit, a first reset circuit and a first filter circuit, the first input end of the first control chip is used to connect the pressure sensor, and the first control chip is electrically connected to the first crystal oscillator circuit, the first reset circuit and the first filter circuit respectively.

[0009] In one embodiment, the sensor control board further includes: a second filter circuit, wherein an input end of the second filter circuit is connected to an output end of the pressure sensor, and an output end of the second filter circuit is connected to a first input end of the first control chip.

[0010] In one embodiment, the sensor control board further includes: a third filter circuit, the input end of the third filter circuit is connected to the output end of the body temperature detection module, and the output end of the third filter circuit is connected to the fourth input end of the first control chip.

[0011] In one embodiment, the ventilator control circuit further includes a display module, and an input end of the display module is connected to the first output end of the main control board.

[0012] In one embodiment, the ventilator control circuit further includes a data transmission module, a first data transmission interface of the data transmission module is electrically connected to the main control board, and a second data transmission interface of the data transmission module is used to connect to an external data server.

[0013] In one embodiment, the main control board includes: a main control chip, a second crystal oscillator circuit, a third crystal oscillator circuit and a second reset circuit, the first input end of the main control chip is connected to the output end of the sensor control board, the data transmission end of the main control chip is connected to the first data transmission interface of the data transmission module, the first output end of the main control chip is connected to the input end of the display module, the second crystal oscillator circuit is electrically connected to the main control chip, the third crystal oscillator circuit is electrically connected to the main control chip, and the second reset circuit is electrically connected to the main control chip.

[0014] In a second aspect, the present embodiment provides a ventilator device, which includes a control host and an air source component, wherein the control host is provided with a ventilator control circuit as described in the first aspect and its improvement.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0016] The ventilator control circuit of the utility model includes a main control board and a sensor control board. The sensor control board is added between the sensor and the main control board. The sensor control board can optimize and fuse the original signal received from the sensor, and transmit the optimized signal to the main control board. The main control board controls the ventilator system according to the signal sent by the sensor control board. The ventilator control circuit of the utility model optimizes the storage and transportation of sensor signals, expands the function and application scope of the ventilator system, greatly improves the working efficiency of the main control board, and improves the reliability and stability of the ventilator system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the module structure of the ventilator control circuit provided in the first embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the module structure of the ventilator control circuit provided in the second embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the module structure of the ventilator control circuit provided in the third embodiment of the present utility model;

[0021] Figure 4 This is a circuit connection diagram of the sensor control board provided in the fourth embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the module structure of the ventilator control circuit provided in Embodiment 5 of the present utility model;

[0023] Figure 6 This is a schematic diagram of the module structure of the ventilator control circuit provided in the sixth embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the module structure of the sensor control board provided in the seventh embodiment of the present utility model;

[0025] Figure 8 This is a schematic diagram of the module structure of the sensor control board provided in the eighth embodiment of the present utility model;

[0026] Fig. 9 This is a schematic diagram of the module structure of the main control board provided in the ninth embodiment of the present utility model;

[0027] Among them, 1. main control board, 2. sensor control board, 3. pressure sensor, 4. oxygen concentration sensor, 5. blood oxygen concentration detection module, 6. body temperature detection module, 7. display module, 8. data transmission module, 11. main control chip, 12. second crystal oscillator circuit, 13. third crystal oscillator circuit, 14. second reset circuit, 21. first control chip, 22. first crystal oscillator circuit, 23. first reset circuit, 24. first filter circuit, 25. second filter circuit, 26. third filter circuit. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In order to thoroughly understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosure belongs. It will be further understood that the terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0033] In the first embodiment, Figure 1As shown, a module structure schematic diagram of a ventilator control circuit is provided, including: a main control board 1 and a sensor control board 2, the first input end of the sensor control board 2 is connected to a pressure sensor 3, the second input end of the sensor control board 2 is connected to an oxygen concentration sensor 4, the output end of the sensor control board 2 is connected to the first input end of the main control board 1, the sensor control board 2 is used to obtain the pressure signal output by the pressure sensor 3 and the oxygen concentration signal output by the oxygen concentration sensor 4, and forward the pressure signal and the oxygen concentration signal to the main control board 1.

[0034] It is understandable that the main control board 1 in this embodiment can be any kind of processor, such as MCU, DSP, MPU, etc. Preferably, the main control board in this embodiment is MCU, and the sensor control board 2 in this embodiment can be any kind of control chip.

[0035] The ventilator in this embodiment includes an oxygen concentration sensor 4 and a pressure sensor 3. It is understandable that if the ventilator includes any other type of sensor except the oxygen concentration sensor 4 and the pressure sensor 3, or includes multiple other types of sensors, the signals output by the other types of sensors will also be transmitted to the sensor control board 2. The signals output by any sensor in the ventilator are first transmitted to the sensor control board 2, and then forwarded by the sensor control board 2 to the main control board 1.

[0036] Preferably, the model of the oxygen concentration sensor 4 in this embodiment is MAX-250E, and the model of the pressure sensor 3 in this embodiment is SM5852-001.

[0037] The oxygen concentration sensor 4 in this embodiment is used to detect the oxygen concentration of the object to be measured, and convert the oxygen concentration into an oxygen concentration signal and transmit it to the sensor control board 2. The pressure sensor 3 in this embodiment is used to detect the pressure of the object to be measured, and convert the pressure into a pressure signal and transmit it to the sensor control board 2. The object to be measured of the oxygen concentration sensor 4 and the object to be measured of the pressure sensor 3 can be the same object to be measured, or they can be different objects to be measured.

[0038] The working process of the above-mentioned ventilator control circuit is: the sensor control board 2 drives the oxygen concentration sensor 4 and the pressure sensor 3 to perform detection, the oxygen concentration sensor 4 and the pressure sensor 3 feed back the detected oxygen concentration signal and pressure signal to the sensor control board 2, the sensor control board 2 organizes and optimizes the oxygen concentration signal and pressure signal and then transmits them to the main control board 1, and the main control board 1 controls the ventilator system according to the signal sent by the sensor control board 2.

[0039] The ventilator control circuit of this embodiment optimizes the storage and transportation of sensor signals by adding a sensor control board 2 between the sensor and the main control board 1, expands the function and application scope of the ventilator system, greatly improves the working efficiency of the main control board 1, and improves the reliability and stability of the ventilator system.

[0040] In the second embodiment, Figure 2 As shown, a module structure schematic diagram of a ventilator control circuit is provided. On the basis of embodiment 1, the third input terminal of the sensor control board 2 is connected to the blood oxygen concentration detection module 5. The sensor control board 2 is also used to obtain the blood oxygen concentration signal of the blood oxygen concentration detection module 5 and forward the blood oxygen concentration signal to the main control board 1.

[0041] The blood oxygen concentration detection module 5 of this embodiment is used to detect the blood oxygen concentration of the object being measured, and convert the blood oxygen concentration into a blood oxygen concentration signal and transmit it to the sensor control board 2. Preferably, the model of the blood oxygen concentration detection module 5 in this embodiment is GE Dash2500.

[0042] The working process of the above-mentioned ventilator control circuit is: the sensor control board 2 drives the blood oxygen concentration detection module 5 to perform detection, the blood oxygen concentration detection module 5 feeds back the detected blood oxygen concentration signal to the sensor control board 2, the sensor control board 2 organizes and optimizes the blood oxygen concentration signal and then transmits it to the main control board 1, and the main control board 1 controls the ventilator system according to the blood oxygen concentration signal sent by the sensor control board 2.

[0043] In the ventilator control circuit of this embodiment, the blood oxygen concentration signal detected by the blood oxygen concentration detection module 5 is also processed by the sensor control board 2 and then sent to the main control board 1, which optimizes the storage and transportation of the blood oxygen concentration signal, further improves the working efficiency of the main control board 1, and improves the reliability and stability of the ventilator system.

[0044] In the third embodiment, Figure 3 As shown, a module structure schematic diagram of a ventilator control circuit is provided. On the basis of the second embodiment, the fourth input terminal of the sensor control board 2 is connected to the body temperature detection module 6. The sensor control board 2 is also used to obtain the body temperature signal of the body temperature detection module 6 and forward the body temperature signal to the main control board 1.

[0045] The body temperature detection module 6 of this embodiment is used to detect the body temperature of the object being measured, and convert the body temperature into a body temperature signal pair and transmit it to the sensor control board 2. Preferably, the model of the body temperature detection module in this embodiment is MX11000.

[0046] The working process of the above-mentioned ventilator control circuit is: the sensor control board 2 drives the body temperature detection module 6 for detection, the body temperature detection module 6 feeds back the detected body temperature signal to the sensor control board 2, the sensor control board 2 organizes and optimizes the body temperature signal and then transmits it to the main control board 1, and the main control board 1 controls the ventilator system according to the body temperature signal sent by the sensor control board 2.

[0047] Preferably, the main control board 1 collects and monitors the blood oxygen concentration and positive end-tidal pressure value of the object under test, and determines to exclude the ventilator correlation state caused by the designated ventilator according to the blood oxygen concentration and the positive end-tidal pressure value; after determining to exclude the ventilator correlation state caused by the designated ventilator, collect the inhaled oxygen concentration and the second positive end-tidal pressure value of the object under test, and determine the ventilator correlation state caused by the designated ventilator according to the inhaled oxygen concentration and the second positive end-tidal pressure value; after determining the ventilator correlation state caused by the designated ventilator, the main control board 1 obtains the body temperature parameter, white blood cell parameter, antibiotic usage parameter and second blood oxygen saturation value of the object under test, and the second blood oxygen saturation value may refer to the blood oxygen concentration value of the object under test continuously collected by the designated ventilator during the time period from determining to exclude the ventilator correlation state caused by the designated ventilator to determining the ventilator correlation state related to infection caused by the designated ventilator, and determines the ventilator correlation state related to infection caused by the designated ventilator according to the body temperature parameter, white blood cell parameter, antibiotic usage parameter and the second blood oxygen saturation value. Automatically realizes real-time monitoring and judgment of the ventilator-related status, reduces the risk of complications caused by the ventilator, and not only improves the objective accuracy of the test results, but also improves the detection efficiency

[0048] In the ventilator control circuit of this embodiment, the body temperature signal detected by the body temperature detection module 6 is also processed by the sensor control board 2 and then sent to the main control board 1, which optimizes the storage and transportation of the body temperature signal, further improves the working efficiency of the main control board 1, and improves the reliability and stability of the ventilator system.

[0049] In the fourth embodiment, Figure 4 As shown, a circuit connection diagram of a sensor control board is provided. On the basis of the third embodiment, the sensor control board 2 includes: a first control chip 21, a first crystal oscillator circuit 22, a first reset circuit 23 and a first filter circuit 24. The first input end of the first control chip 21 is used to connect the pressure sensor 3, the first crystal oscillator circuit 22 is electrically connected to the first control chip 21, the first reset circuit 23 is electrically connected to the first control chip 21, and the first filter circuit 24 is electrically connected to the first control chip 21.

[0050] Preferably, the second input end of the first control chip 21 is used to connect the oxygen concentration sensor 4, the third input end of the first control chip 21 is used to connect the blood oxygen concentration detection module 5, the fourth input end of the first control chip 21 is used to connect the body temperature detection module 6, and the output end of the first control chip 21 is connected to the first input end of the main control board 1.

[0051] Specifically, pin 34 and pin 35 of the first control chip 21 are connected to the main control board, pin 25 of the first control chip 21 is connected to the pressure sensor 3, pin 37 and pin 38 of the first control chip 21 are connected to the oxygen concentration sensor 4, pin 21 of the first control chip 21 is connected to the body temperature detection module 6, pin 54 and pin 63 of the first control chip 21 are connected to the blood oxygen concentration detection module 5, pin 7 of the first control chip 21 is connected to the first reset circuit 23, pin 5 and pin 6 of the first control chip 21 are connected to the first crystal oscillator circuit 22, pin 19, pin 32, pin 48 and pin 64 of the first control chip 21 are connected and connected to one end of the first filter circuit 24, and pin 63 and pin 18 of the first control chip 21 are connected and connected to the other end of the first filter circuit 24.

[0052] The working process of the above-mentioned ventilator control circuit is as follows: the first crystal oscillator circuit 22 provides a clock frequency signal for the first control chip 21, the first reset circuit 23 keeps the first control chip 21 in a reset state during the power-on or reset process of the first control chip 21, and the first filter circuit 24 filters the power signal before it flows to the first control chip 21.

[0053] In the ventilator control circuit of this embodiment, the first crystal oscillator circuit 22 can generate the clock frequency required for the first control chip 21 to work normally, so that the first control chip 21 can operate normally. The first reset circuit 23 can prevent the first control chip 21 from issuing erroneous instructions and performing erroneous operations, thereby improving electromagnetic compatibility performance. The first filter circuit 24 can remove high-frequency noise and low-frequency interference, thereby making the power supply signal purer and protecting the first control chip 21.

[0054] In Example 5, Figure 5 As shown, a schematic diagram of the module structure of a sensor control board is provided. On the basis of the fourth embodiment, the sensor control board 2 also includes: a second filter circuit 25, the input end of the second filter circuit 25 is connected to the output end of the pressure sensor 3, and the output end of the second filter circuit 25 is connected to the first input end of the first control chip 21.

[0055] It can be understood that the second filtering circuit 25 in this embodiment is any kind of filtering circuit, and only a resistor can be set in the circuit for filtering, or only a capacitor can be set in the circuit for filtering, or a resistor and a capacitor can be set in the circuit for RC filtering, or a resistor, a capacitor and an inductor can be set in the circuit for RCL filtering. Preferably, a resistor, a capacitor and an inductor are set in the circuit for RCL filtering.

[0056] The working process of the above-mentioned ventilator control circuit is as follows: the pressure signal output by the pressure sensor 3 is filtered by the second filter circuit 25 and then transmitted to the first control chip 21 .

[0057] In the ventilator control circuit of this embodiment, a second filter circuit 25 is arranged between the pressure sensor 3 and the first control chip 21. The second filter circuit 25 filters the pressure signal and protects the first control chip 21, thereby improving the stability and reliability of the circuit.

[0058] In Example 6, Figure 6 As shown, a schematic diagram of the module structure of a sensor control board 2 is provided. On the basis of the fourth embodiment, the sensor control board 2 also includes: a third filtering circuit 26, the input end of the third filtering circuit 26 is connected to the output end of the body temperature detection module 6, and the output end of the third filtering circuit 26 is connected to the fourth input end of the first control chip 21.

[0059] It is understandable that the third filter circuit 26 can be configured to have the same structure as the second filter circuit 25 , or can be configured to have a different structure from the second filter circuit 25 . Preferably, the second filter circuit 25 and the third filter circuit 26 have the same structure.

[0060] The working process of the above-mentioned ventilator control circuit is as follows: the body temperature signal output by the body temperature detection module 6 is filtered by the third filter signal and then transmitted to the first control chip 21 .

[0061] In the ventilator control circuit of this embodiment, a third filtering circuit 26 is arranged between the body temperature detection module 6 and the first control chip 21. The third filtering circuit 26 filters the body temperature signal and protects the first control chip 21, thereby improving the stability and reliability of the circuit.

[0062] In embodiment seven, Figure 7 As shown, a schematic diagram of the module structure of a ventilator control circuit is provided. On the basis of the first embodiment, the ventilator control circuit further includes a display module 7, and the input end of the display module 7 is connected to the first output end of the main control board 1.

[0063] Preferably, the display module 7 is a display screen, which can display various indicator parameters of the user as well as the parameters of the ventilator itself. The main control board 1 and the display module 7 can be transmitted by wire or by wireless.

[0064] The working process of the above-mentioned ventilator control circuit is as follows: the main control board 1 transmits various signals that need to be displayed to the display module 7 through the first output terminal.

[0065] The ventilator control circuit of this embodiment adds a display module 7 to the ventilator. The display module 7 can display various index parameters of the user and various parameters of the ventilator itself, so that the user can understand the breathing condition and the operation condition of the ventilator in time, ensuring the normal operation of the ventilator and the safety of the user.

[0066] In the eighth embodiment, Figure 8 As shown, a module structure diagram of a ventilator control circuit is provided. On the basis of embodiment seven, the ventilator control circuit also includes a data transmission module 8, a first data transmission interface of the data transmission module 8 is electrically connected to the main control board 1, and a second data transmission interface of the data transmission module 8 is used to connect to an external data server.

[0067] The data server is provided with a database, preferably, the database is a hospital database, the data transmission module 8 can be integrated inside the ventilator, or it can be a separate data transmission module 8, which can be a wired network module, or a wireless network module, such as a WIFI module, a 5G module or a 4G module.

[0068] The working process of the above-mentioned ventilator control circuit is as follows: information is transmitted between the ventilator and the data server through the data transmission module 8, the ventilator transmits the user's information to the database in the data server through the data transmission module 8, and the ventilator can also call various data of the user from the database through the data transmission module 8, and determine the user's physical condition based on the various data. Furthermore, the main control board 1 combines the information in the database to determine the ventilator-related status related to the infection caused by the specified ventilator.

[0069] The ventilator control circuit of this embodiment is provided with a data transmission module 8 to enable data transmission between the ventilator and the database, which can facilitate the user to record and analyze data, facilitate real-time monitoring of the user, and facilitate mutual cooperation between different users.

[0070] In the ninth embodiment, Fig. 9As shown, a schematic diagram of the module structure of a main control board is provided. On the basis of Example 8, the main control board 1 includes: a main control chip 11, a second crystal oscillator circuit 12, a third crystal oscillator circuit 13 and a second reset circuit 14. The first input end of the main control chip 11 is connected to the output end of the sensor control board 2, the data transmission end of the main control chip 11 is connected to the first data transmission interface of the data transmission module 8, the first output end of the main control chip 11 is connected to the input end of the display module 7, the second crystal oscillator circuit 12 is electrically connected to the main control chip 11, the third crystal oscillator circuit 13 is electrically connected to the main control chip 11, and the second reset circuit 14 is electrically connected to the main control chip 11.

[0071] The working process of the above-mentioned ventilator control circuit is: the second crystal oscillator circuit 12 provides a clock signal to the main control chip 11, the third crystal oscillator circuit 13 provides a frequency signal to the main control chip 11, and the second reset circuit 14 keeps the main control chip 11 in a reset state during power-on or reset of the main control chip 11.

[0072] The ventilator control circuit of this embodiment enables the main control chip 11 to operate normally by setting the second crystal oscillator circuit 12 and the third crystal oscillator circuit 13, and the second reset circuit 14 can prevent the main control chip 11 from issuing erroneous instructions and performing erroneous operations.

[0073] In the tenth embodiment, a ventilator device is provided, which includes a control host and an air source component, and the control host is provided with the ventilator control circuit mentioned in any of the above embodiments.

[0074] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A ventilator control circuit, characterized in that: include: A main control board and a sensor control board, wherein the first input end of the sensor control board is connected to the pressure sensor, the second input end of the sensor control board is connected to the oxygen concentration sensor, the output end of the sensor control board is connected to the first input end of the main control board, and the sensor control board is used to obtain the pressure signal output by the pressure sensor and the oxygen concentration signal output by the oxygen concentration sensor, and forward the pressure signal and the oxygen concentration signal to the main control board.

2. The ventilator control circuit according to claim 1, characterized in that: The third input terminal of the sensor control board is connected to the blood oxygen concentration detection module. The sensor control board is also used to obtain the blood oxygen concentration signal of the blood oxygen concentration detection module and forward the blood oxygen concentration signal to the main control board.

3. The ventilator control circuit according to claim 2, characterized in that: The fourth input terminal of the sensor control board is connected to the body temperature detection module. The sensor control board is also used to obtain the body temperature signal of the body temperature detection module and forward the body temperature signal to the main control board.

4. The ventilator control circuit according to claim 3, characterized in that: The sensor control board includes: a first control chip, a first crystal oscillator circuit, a first reset circuit and a first filter circuit. The first control chip is electrically connected to the first crystal oscillator circuit, the first reset circuit and the first filter circuit respectively.

5. The ventilator control circuit according to claim 4, characterized in that: The sensor control board further includes: a second filter circuit, wherein an input end of the second filter circuit is connected to an output end of the pressure sensor, and an output end of the second filter circuit is connected to a first input end of the first control chip.

6. The ventilator control circuit according to claim 4, characterized in that: The sensor control board also includes: a third filter circuit, the input end of the third filter circuit is connected to the output end of the body temperature detection module, and the output end of the third filter circuit is connected to the fourth input end of the first control chip.

7. The ventilator control circuit according to claim 1, characterized in that: The ventilator control circuit also includes a display module, and an input end of the display module is connected to the first output end of the main control board.

8. The ventilator control circuit according to claim 7, characterized in that: The ventilator control circuit also includes a data transmission module, a first data transmission interface of the data transmission module is electrically connected to the main control board, and a second data transmission interface of the data transmission module is used to connect to an external data server.

9. The ventilator control circuit according to claim 8, characterized in that: The main control board includes: a main control chip, a second crystal oscillator circuit, a third crystal oscillator circuit and a second reset circuit. The first input end of the main control chip is connected to the output end of the sensor control board, the data transmission end of the main control chip is connected to the first data transmission interface of the data transmission module, the first output end of the main control chip is connected to the input end of the display module, the second crystal oscillator circuit is electrically connected to the main control chip, the third crystal oscillator circuit is electrically connected to the main control chip, and the second reset circuit is electrically connected to the main control chip.

10. A ventilator device, comprising a control host and an air source component, characterized in that: The control host is provided with a ventilator control circuit as described in any one of claims 1-9.

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