Ventilation device and method, apparatus, medium, controller for detecting a diaphragm thereof

Abstract

A ventilation device and its diaphragm installation detection method, apparatus, medium, and controller are disclosed. The method includes: recording the airway pressure in the expiratory airway during the process of introducing gas from the inlet into the expiratory airway to obtain an initial pressure waveform, wherein the inlet pressure of the gas is less than the PEEP value set by the PEEP valve; and determining whether the diaphragm is installed at the outlet of the expiratory airway based on the initial pressure waveform. The solution provided in this application can effectively detect the situation where the diaphragm at the outlet of the expiratory airway of the ventilation device is missing.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a ventilation device and its diaphragm installation and testing method, apparatus, medium, and controller. Background Technology

[0002] Positive end-expiratory pressure (PEEP) valves are an essential component of ventilation equipment. PEEP valves maintain a certain positive pressure in the expiratory airway at the end of expiration, preventing alveoli from completely collapsing, expanding collapsed alveoli and re-expanding atelectasis alveoli, thus increasing functional residual capacity and lung compliance, which is beneficial for improving oxygenation.

[0003] In addition, ventilation devices typically have a diaphragm at the outlet of the expiratory airway, through which gas in the expiratory airway is expelled from the device. During use, users need to remove and clean the diaphragm periodically. Because the diaphragm is small, it is easy for it to be missed after cleaning. However, current ventilation device self-inspection procedures usually do not include checking for missing diaphragms, which is detrimental to correct user operation. Summary of the Invention

[0004] This application provides a ventilation device and a method, apparatus, medium, and controller for detecting the installation of its diaphragm, which can effectively detect the situation where the diaphragm on the expiratory airway of the ventilation device is missing.

[0005] In a first aspect, embodiments of this application provide a method for detecting the installation of a diaphragm in a ventilation device. The ventilation device includes an expiratory airway and a PEEP valve. The expiratory airway has an inlet and an outlet. The method includes: during the process of inputting gas from the inlet into the expiratory airway, recording the airway pressure in the expiratory airway to obtain an initial pressure waveform, wherein the inlet pressure of the gas is less than the PEEP value set by the PEEP valve; and determining, based on the initial pressure waveform, whether the diaphragm is installed at the outlet of the expiratory airway.

[0006] Optionally, determining whether the diaphragm is installed at the outlet of the expiratory airway based on the initial pressure waveform includes: if the airway pressure is zero, increasing the gas inlet flow rate, wherein the inlet pressure remains less than the PEEP value after increasing the inlet flow rate; if the outlet flow rate is greater than the flow rate threshold after increasing the gas inlet flow rate, determining that the diaphragm is not installed at the outlet; if the outlet flow rate is less than or equal to the flow rate threshold after increasing the gas inlet flow rate, closing the PEEP valve and continuing to increase the gas inlet flow rate; if the outlet flow rate is zero after closing the PEEP valve and continuing to increase the gas inlet flow rate, determining that the diaphragm is installed at the outlet, and if the outlet flow rate remains unchanged, determining that the diaphragm is not installed at the outlet.

[0007] Optionally, the method further includes: if it is determined that the diaphragm is installed at the air outlet, outputting a first control signal, the first control signal being used to control the opening degree of the PEEP valve or to control the inlet pressure; during the control process, recording the airway pressure and / or the outlet flow rate to obtain a first detection waveform; and determining the installation status of the diaphragm based on the first detection waveform.

[0008] Optionally, determining the installation state of the diaphragm based on the first detection waveform includes: determining whether the first detection waveform and the first reference waveform are similar; if the determination result is yes, then the diaphragm is determined to be in a standard installation state; if the determination result is no, then the diaphragm is determined to be in an abnormal installation state; wherein, the first reference waveform is acquired during the process when the diaphragm is in a standard installation state and the first control signal is output.

[0009] Optionally, the method further includes: outputting a second control signal, the second control signal being used to increase the opening of the PEEP valve; during the control process, recording the airway pressure and / or the outflow rate to obtain a second detection waveform; if the second detection waveform indicates that the rate of decrease in airway pressure or the outflow rate at the outlet also increases after increasing the opening of the PEEP valve, then determining that the diaphragm is installed on the expiratory airway; if the second detection waveform indicates that the rate of decrease in airway pressure or the outflow rate remains unchanged after increasing the opening of the PEEP valve, then determining that the diaphragm is not installed at the outlet.

[0010] Optionally, the method further includes: outputting a third control signal, the third control signal being used to control the gas inlet pressure to vary within a range greater than the PEEP value; during the control process, recording the airway pressure to obtain a third detection waveform; if the third detection waveform indicates that the change trend of the airway pressure is consistent with the change trend of the inlet pressure, then determining that the diaphragm is not installed at the outlet; if the third detection waveform indicates that the airway pressure is maintained at the PEEP value, then determining that the diaphragm is installed at the outlet.

[0011] Secondly, embodiments of this application also provide a diaphragm installation detection device for a ventilation device, the ventilation device including an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet, the device including: a data acquisition module, used to record the airway pressure in the expiratory airway during the process of inputting gas from the inlet into the expiratory airway to obtain an initial pressure waveform, wherein the inlet pressure of the gas is less than the PEEP value set by the PEEP valve; and a processing module, used to determine whether the diaphragm is installed at the outlet of the expiratory airway based on the initial pressure waveform.

[0012] Thirdly, embodiments of this application provide a method for detecting the installation of a diaphragm in a ventilation device, comprising: outputting a control signal, the control signal being used to control the opening degree of a PEEP valve or to control the inlet pressure of the expiratory airway of the ventilation device; recording the pressure in the expiratory airway of the ventilation device during the process of controlling the opening degree of the PEEP valve or the process of controlling the inlet pressure, thereby obtaining a first pressure waveform; and determining whether a diaphragm is installed on the expiratory airway based on the first pressure waveform.

[0013] Optionally, the control signal is used to increase the opening of the PEEP valve. Determining whether a diaphragm is installed on the expiratory airway based on the first pressure waveform includes: if the first pressure waveform indicates that the rate of pressure drop also increases after increasing the opening of the PEEP valve, then it is determined that the diaphragm is installed on the expiratory airway; if the first pressure waveform indicates that the rate of pressure drop remains unchanged after increasing the opening of the PEEP valve, then it is determined that the diaphragm is not installed on the expiratory airway.

[0014] Optionally, before outputting the control signal, the method further includes: recording the pressure of the expiratory airway within a preset time after receiving the start signal of the ventilation device, and obtaining a second pressure waveform; acquiring a pre-collected reference pressure waveform, wherein the reference pressure waveform is collected in the state where the diaphragm is not installed on the expiratory airway; determining whether the second pressure waveform and the reference pressure waveform are similar, and if not, determining that the diaphragm is installed on the expiratory airway.

[0015] Optionally, the output control signal includes: if the second pressure waveform and the reference pressure waveform are similar, then the control signal is output.

[0016] Optionally, obtaining the pre-collected reference pressure waveform includes: determining whether the pressure leakage value exceeds a preset threshold based on the second pressure waveform; if the determination result is yes, then obtaining the reference pressure waveform.

[0017] Optionally, when the intake pressure varies within a range greater than the PEEP value, determining whether a diaphragm is installed on the expiratory airway based on the first pressure waveform includes: if the pressure change trend in the expiratory airway is consistent with the pressure change trend in the intake pressure, then it is determined that the diaphragm is not installed on the expiratory airway; if the pressure in the expiratory airway remains at the PEEP value, then it is determined that the diaphragm is installed on the expiratory airway.

[0018] Fourthly, embodiments of this application provide a diaphragm installation detection device for a ventilation device, the ventilation device including a PEEP valve, the device including: a control module for outputting a control signal, the control signal being used to control the opening degree of the PEEP valve or to control the inlet pressure of the expiratory airway of the ventilation device; a pressure recording module for recording the pressure in the expiratory airway of the ventilation device during the process of controlling the opening degree of the PEEP valve or controlling the inlet pressure, to obtain a first pressure waveform; and a judgment module for detecting whether a diaphragm is installed on the expiratory airway valve based on the first pressure waveform.

[0019] Fifthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon. When the computer program is run by a processor, it performs the steps of the diaphragm installation detection method for ventilation equipment provided in the first or third aspect above.

[0020] In a sixth aspect, embodiments of this application provide a controller, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the steps of the membrane installation detection method for ventilation equipment provided in the first or third aspect above when running the computer program.

[0021] In a seventh aspect, embodiments of this application provide a ventilation device, including: an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet; and a controller for performing the steps of the diaphragm installation detection method for a ventilation device provided in the first or third aspect above.

[0022] Compared with the prior art, the technical solution of this application embodiment has the following beneficial effects:

[0023] In the embodiment of this application, during the process of inputting gas from the inlet of the expiratory airway into the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. Since the gas inlet pressure is less than the PEEP value set by the PEEP valve, if a diaphragm is installed, the diaphragm will not be pushed open, and the outlet of the expiratory airway will be isolated from the atmosphere. However, if no diaphragm is installed, the outlet of the expiratory airway will be connected to the atmosphere. Therefore, the initial pressure waveform can be used to quickly determine whether the diaphragm is missing.

[0024] Furthermore, in the solution of this application embodiment, if the initial pressure waveform indicates that the airway pressure is zero, the gas inlet flow rate is increased. If the inlet pressure remains lower than the PEEP value after increasing the inlet flow rate, and the outlet flow rate is greater than the flow threshold, it can be determined that the outlet is not equipped with a diaphragm. If the outlet flow rate is less than or equal to the flow threshold, it may be due to the outlet being blocked by a diaphragm, or it may be caused by other leaks in the expiratory airway before the outlet. Therefore, in the solution of this application embodiment, the PEEP valve is closed and the inlet flow rate is further increased. If the outlet flow rate is zero, it is determined that a diaphragm is installed at the outlet. If the outlet flow rate remains unchanged, it is determined that no diaphragm is installed at the outlet, and the outlet flow rate being less than or equal to the threshold is caused by gas leakage at other leak points. Using the above solution, it is possible to identify situations where gas leaks from other leak points in the expiratory airway, which helps ensure the accuracy of the diaphragm leakage determination.

[0025] Furthermore, in the solution of this application embodiment, when it is determined that a diaphragm is installed at the air outlet, the airway pressure or air flow rate during the control process based on the first control signal is recorded to obtain a first detection waveform. Then, the first detection waveform is compared with a first reference waveform. Since the first reference waveform is collected during the process of the diaphragm being in a standard installation state and the first control signal being output, it is possible to further determine whether the diaphragm is in a standard installation state, thereby identifying the state in which the diaphragm is not properly installed, so as to ensure the normal use of the subsequent ventilation equipment. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating the first method for diaphragm installation and testing of ventilation equipment in the embodiments of this application;

[0027] Figure 2 This is a flowchart illustrating the second method for diaphragm installation and testing of ventilation equipment in the embodiments of this application;

[0028] Figure 3 This is a flowchart illustrating the third method for diaphragm installation and testing of ventilation equipment in the embodiments of this application;

[0029] Figure 4This is a flowchart illustrating the fourth method for diaphragm installation and testing of ventilation equipment in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of the structure of a diaphragm installation detection device for ventilation equipment according to an embodiment of this application;

[0031] Figure 6 This is a flowchart illustrating the fifth method for diaphragm installation and testing of ventilation equipment in the embodiments of this application. Detailed Implementation

[0032] As described in the background section, users need to remove the diaphragm for cleaning periodically. Due to the small size of the diaphragm, it is easy for it to be missed after cleaning.

[0033] In the embodiments of this application, the ventilation device can refer to various devices that discharge the gas in the internal air passage of the device to the atmosphere, such as a ventilator, an anesthetic, etc., but is not limited thereto.

[0034] As mentioned above, the ventilation equipment includes: an expiratory airway and a PEEP valve. The expiratory airway has an inlet and an outlet. Under normal use, a diaphragm is installed at the outlet of the expiratory airway.

[0035] In addition, the ventilation device includes pressure sensors and flow sensors. The pressure sensor can be installed on the expiratory airway to detect the airway pressure. Multiple flow sensors can be present; a flow sensor can be installed at the inlet of the expiratory airway to detect the inlet flow rate. Furthermore, a flow sensor can also be installed at the outlet of the expiratory airway to detect the outlet flow rate. For example, gas can first pass through the outlet and then through the flow sensor located at the outlet.

[0036] In addition, the ventilation device also includes an exhalation valve. A diaphragm is typically located between the exhalation valve and the PEEP valve of the ventilation device. More specifically, the exhalation valve is positioned in the exhalation airway of the ventilation device near the outlet, and the diaphragm is typically mounted on the exhalation valve. In the embodiments of this application, whether or not a diaphragm is installed at the outlet of the exhalation airway can refer to whether a diaphragm is installed at the gas outlet of the exhalation valve.

[0037] Furthermore, the exhalation valve has an inlet and an outlet. The inlet of the exhalation valve is connected to the inlet of the expiratory airway, and the outlet of the exhalation valve is connected to the outlet of the expiratory airway. When the ventilation device is in use, the diaphragm can isolate or connect the inlet and outlet of the exhalation valve. When the patient exhales, the gas entering the expiratory airway enters the exhalation valve through the inlet. If the inlet pressure is greater than a set positive pressure value, the diaphragm is opened, connecting the inlet and outlet, and the patient's exhaled gas flows to the atmosphere through the outlet.

[0038] The greater the degree to which the diaphragm is opened, the greater the gas flow in the expiratory airway, and the faster the patient's exhaled gas is expelled into the atmosphere; the smaller the degree to which the diaphragm is opened, the slower and more smoothly the gas is expelled into the atmosphere, thus maintaining the air pressure in the expiratory airway at the aforementioned "set positive pressure value".

[0039] The aforementioned "set positive pressure value" is controlled by the PEEP valve. The higher the set positive pressure value, the less likely the diaphragm will be pushed open; the lower the set positive pressure value, the easier the diaphragm will be pushed open. The aforementioned set positive pressure value is also commonly referred to as the "PEEP value," and will be described using the PEEP value in the following text.

[0040] In view of this, in the embodiment of this application, during the process of inputting gas from the inlet of the expiratory airway into the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. Since the gas inlet pressure is less than the PEEP value set by the PEEP valve, if a diaphragm is installed, the diaphragm will not be pushed open, and the outlet of the expiratory airway will be isolated from the atmosphere. However, if no diaphragm is installed, the outlet of the expiratory airway will be connected to the atmosphere. Therefore, the initial pressure waveform can be used to quickly determine whether the diaphragm is missing.

[0041] It should be noted that in the solution of this application embodiment, determining whether a diaphragm is installed on the expiratory airway is equivalent to determining whether a diaphragm is installed on the expiratory valve.

[0042] To make the above-mentioned objectives, features and beneficial effects of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0043] It should be noted that the method provided in this embodiment can be executed by the controller of the ventilation equipment, and the method can be applied to the self-test process of the ventilation equipment upon startup. That is, in this embodiment, the self-test process may include a self-test of the diaphragm installation.

[0044] It is understood that, in specific implementations, the method can be implemented using a software program that runs in a processor integrated within the chip or chip module; or, the method can be implemented using hardware or a combination of hardware and software.

[0045] Example 1

[0046] Reference Figure 1 , Figure 1 This is a flowchart illustrating the first method for diaphragm installation and testing of ventilation equipment in the embodiments of this application. Figure 1 The diaphragm mounting inspection method shown may include the following steps:

[0047] Step S11: During the process of inputting gas from the air inlet to the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve.

[0048] Step S12: Based on the initial pressure waveform, determine whether the diaphragm is installed at the outlet of the expiratory airway.

[0049] In the specific implementation of step S11, step S11 can be executed when a self-test signal is detected. The self-test signal can be a start signal for the ventilation device. Alternatively, the self-test signal can be a pre-set time-based self-test signal, for example, it can be issued periodically. Or, the self-test signal can be a detection signal triggered by a user. The user can be a user or maintenance personnel of the ventilation device, and is not necessarily a patient.

[0050] Furthermore, in response to the self-test signal, gas can be introduced into the expiratory airway from the air inlet, and the airway pressure in the expiratory airway during the gas introduction process can be recorded. The duration of gas introduction can be preset, and this embodiment does not impose any limitations on it. In other words, the airway pressure in the respiratory airway is recorded over a period of time to obtain an initial pressure waveform.

[0051] For example, the start time of the time period can be later than the time when the self-test signal is received. For instance, a constant flow rate of gas can be input for a certain period of time before recording airway pressure begins.

[0052] Specifically, the inlet pressure of the input gas is less than the PEEP value set by the PEEP valve. More specifically, the opening of the PEEP valve remains unchanged during the recording of the initial pressure waveform, that is, the PEEP value remains unchanged.

[0053] Furthermore, the inlet flow rate of the input gas can remain constant. That is, the initial pressure waveform can be acquired under conditions where a constant flow rate of gas is introduced into the expiratory airway.

[0054] In the specific implementation of step S12, it is determined whether the diaphragm is installed based on the initial pressure waveform.

[0055] As one possible approach, if the initial pressure waveform indicates that the airway pressure is less than or equal to the minimum pressure threshold, it means that the expiratory airway is connected to the atmosphere, and it can be determined that the diaphragm is not installed. If the airway pressure is greater than the minimum pressure threshold, it means that the expiratory airway is not connected to the atmosphere, and it can be determined that the diaphragm is installed.

[0056] The minimum pressure threshold can be preset. For example, the minimum pressure threshold can be 0, 3 mbar, or 5 mbar, etc.

[0057] For another example, airway pressure less than or equal to the minimum pressure threshold can mean that the airway pressure is less than or equal to the minimum pressure threshold and the duration reaches a preset duration threshold. That is, the airway pressure is less than or equal to the minimum pressure threshold for a certain period of time.

[0058] As another possible implementation, the initial pressure waveform can be compared with a first reference pressure waveform. The first reference pressure waveform is the airway pressure in the expiratory airway recorded without the diaphragm installed.

[0059] In practice, the duration of the initial pressure waveform and the duration of the first reference pressure waveform can be the same.

[0060] Furthermore, it is determined whether the initial pressure waveform and the first reference pressure waveform are similar. If the initial pressure waveform and the first reference pressure waveform are similar, it can be determined that the diaphragm is not installed. If the initial pressure waveform and the first reference pressure waveform are not similar, it can be determined that the diaphragm is installed.

[0061] It should be noted that existing waveform similarity comparison algorithms can be used to determine whether the initial pressure waveform and the first reference pressure waveform are similar, such as similarity comparison based on Fourier transform, and this embodiment does not limit this.

[0062] Furthermore, in the solution of this application embodiment, if it is determined that the diaphragm is installed, the other startup self-test procedures of the ventilation equipment can continue or the ventilation equipment can enter its operating state. If it is determined that the diaphragm is not installed, a reminder message can be issued to prompt the user that the diaphragm is not installed. Alternatively, the reminder message can also be used to prompt the user to check whether the diaphragm is installed.

[0063] Specifically, reminder messages can be sent via text, voice, images, etc. In a specific implementation, the ventilation device has a display unit. If it detects that the diaphragm is not installed, it can send a reminder message in the form of audio and display a video or graphic guide to diaphragm installation on the display unit.

[0064] Furthermore, after issuing the alert, the pressure in the expiratory airway can be monitored to determine whether the user has the diaphragm installed.

[0065] Specifically, after issuing the reminder message, the system can listen for confirmation instructions from the user. Specifically, after installing the diaphragm, the user can input a confirmation instruction. In response to the received confirmation instruction, the method provided in this application embodiment can continue to be executed to verify whether the user has correctly installed the diaphragm.

[0066] Therefore, in the solution of this application embodiment, the determination of membrane misinstallation is achieved quickly and effectively by detecting the airway pressure in the expiratory airway. Furthermore, since a pressure sensor is typically installed in the expiratory airway to detect the pressure, the solution provided in this application embodiment can determine whether the membrane is installed based on existing hardware architecture, without requiring any modifications to the hardware architecture.

[0067] Example 2

[0068] Reference Figure 2 , Figure 2 This is a flowchart illustrating the second method for diaphragm installation and testing of ventilation equipment in the embodiments of this application. Figure 2 The diaphragm mounting inspection method shown may include the following steps:

[0069] Step S21: During the process of inputting gas from the air inlet to the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve.

[0070] Step S22: Determine whether the initial pressure waveform and the first reference pressure waveform are similar.

[0071] Specifically, if the initial pressure waveform is not similar to the first reference pressure waveform, step S23 can be executed. If the initial pressure waveform is similar to the first reference pressure waveform, step S24 can be executed.

[0072] Step S23: Confirm that the diaphragm is installed at the air outlet.

[0073] Step S24: Determine whether the air flow rate at the outlet is less than or equal to the minimum flow rate threshold.

[0074] The outlet air flow rate can be detected by a flow sensor installed at the outlet, and the minimum flow threshold can be preset. For example, the minimum flow threshold is 0.

[0075] In practice, during the gas input process, the gas flow rate can be recorded simultaneously with the airway pressure. In step S24, if the gas flow rate is less than or equal to the minimum flow rate threshold for a certain duration, it can be determined that the gas flow rate is less than or equal to the minimum flow rate threshold. Conversely, if the gas flow rate is greater than the minimum flow rate threshold for a certain duration, it can be determined that the gas flow rate is greater than the minimum flow rate threshold.

[0076] Furthermore, if it is determined that the outlet flow rate is less than or equal to the minimum flow rate threshold, step S23 can be executed; if it is determined that the outlet flow rate is greater than the minimum flow rate threshold, step S25 can be executed.

[0077] Step S25: Confirm that no diaphragm is installed at the air outlet.

[0078] Specifically, considering that there are usually other leakage points in the expiratory airway besides the leakage caused by the lack of a diaphragm, even if the initial pressure waveform and the first reference pressure waveform are similar, such similarity may be due to other leakage points. In particular, when the leakage at other leakage points is more serious, it is easy to have a situation where the diaphragm is installed, but the initial pressure waveform and the first reference pressure waveform are similar.

[0079] Therefore, this embodiment further determines the condition by considering the outflow rate. Specifically, since the inlet pressure is less than the PEEP value, if a diaphragm is installed at the outlet, the diaphragm isolates the expiratory airway from the atmosphere, and no gas flows out of the outlet; that is, the outflow rate should be 0. Therefore, if the outflow rate is less than or equal to the minimum flow rate threshold, it can be determined that a diaphragm is installed at the outlet. If no diaphragm is installed at the outlet, the gas in the expiratory airway will flow out through the outlet, and the outflow rate will be significantly greater than 0. Therefore, if the outflow rate is greater than the minimum flow rate threshold, it can be determined that no diaphragm is installed at the outlet.

[0080] From the above, Figure 2 The proposed solution can also eliminate the possibility that the initial pressure waveform is similar to the first reference pressure waveform due to gas leaking out from other points in the exhalation airway, which helps to ensure the accuracy of the diaphragm leakage judgment.

[0081] Optional, Figure 2 The illustrated scheme may also include steps S26 to S29, or may include steps S26 to S28 and step S30.

[0082] Specifically, in practical applications, diaphragms are prone to accumulating external contaminants such as hair, patient sputum, and dust, which can affect the installation surface of the diaphragm. For example, if the diaphragm is not cleaned thoroughly, residual contaminants may remain, leading to improper installation.

[0083] to this end, Figure 2 The method shown can further determine the installation status of the diaphragm, which can refer to whether the diaphragm is correctly installed or whether it is installed in place such that the outlet is sealed when the airway pressure is less than the PEEP value. In this embodiment, the state of correct diaphragm installation is referred to as the standard installation state, and the state of incorrect diaphragm installation is referred to as the abnormal installation state. That is to say, in the standard installation state, if the airway pressure is less than the PEEP value, the outlet is sealed; in the abnormal installation state, if the airway pressure is less than the PEEP value, gas will still flow out from the outlet.

[0084] Therefore, after step S23, step S26 can be performed.

[0085] Step S26: Output a first control signal, which is used to control the opening degree of the PEEP valve or to control the intake pressure.

[0086] As one possible implementation, the first control signal can be used to control the opening degree of the PEEP valve. The opening degree of the PEEP valve can then control the aforementioned PEEP value. Specifically, increasing the PEEP valve opening decreases the PEEP value, and vice versa. In other words, the larger the PEEP valve opening, the smaller the PEEP value, and if a diaphragm is installed on the exhalation valve, the easier it is to open the diaphragm. Conversely, the smaller the PEEP valve opening, the larger the PEEP value, and if a diaphragm is installed on the exhalation valve, the less likely it is to open the diaphragm.

[0087] In this embodiment, during the process of outputting the first control signal to control the opening of the PEEP valve, the intake pressure and / or intake flow rate of the expiratory airway can be maintained at a constant value.

[0088] In specific implementation, the aforementioned first control signal can be generated according to a pre-set control strategy. Specifically, the first control signal can be used to increase the opening degree of the PEEP valve. Alternatively, the first control signal can be used to decrease the opening degree of the PEEP valve. Or, the first control signal can be used to first increase the opening degree of the PEEP valve and then decrease it. Still another option is to first decrease the opening degree of the PEEP valve and then increase it. This embodiment does not limit the specific control strategy.

[0089] As another possible implementation, the first control signal can be used to control the intake pressure. The first control signal can be used to increase the intake pressure, or it can be used to decrease the intake pressure. Alternatively, the first control signal can be used to first increase the intake pressure and then decrease it, etc. This embodiment does not limit the specific control strategy.

[0090] Specifically, during the process of outputting the first control signal to control the intake pressure, the opening of the PEEP valve can remain unchanged. In other words, during the process of controlling the change in intake pressure, the PEEP value remains constant.

[0091] In step S27, during the control process based on the first control signal, the detection result of the pressure sensor can be acquired and recorded to obtain the first detection waveform. Alternatively, during the control process, the change in the outlet air flow rate can be acquired and recorded to obtain the first detection waveform.

[0092] Specifically, during the control process based on the first control signal, the airway pressure or outflow of the expiratory airway can be recorded in real time, and the first detection waveform can be obtained when the control is completed according to the preset control strategy.

[0093] In step S28, it is determined whether the first detected waveform and the first reference waveform are similar. In this case, the first reference waveform may be a waveform recorded when the diaphragm is in a standard installation state, gas is delivered to the expiratory airway with the same inlet pressure and inlet flow rate, and the same first control signal is used for control.

[0094] It is understandable that when the first detected waveform is an airway pressure waveform, the first reference waveform is also a pressure waveform. Similarly, when the first detected waveform is a flow rate waveform, the first reference waveform is also an outflow flow rate waveform.

[0095] It should be noted that the method for judging the similarity between the first detected waveform and the first reference waveform can be any existing waveform similarity judgment algorithm, and this embodiment is not limited to this.

[0096] Further, if the first detected waveform is similar to the first reference waveform, then step S29 is executed; otherwise, step S30 is executed.

[0097] Step S29: Determine that the diaphragm is in the standard installation state.

[0098] Step S30: Determine that the diaphragm is in an abnormal installation state.

[0099] Based on the above, assuming that a diaphragm is installed at the air outlet, the airway pressure or airflow rate during the control process based on the first control signal is recorded to obtain the first detection waveform. Then, the first detection waveform is compared with the first reference waveform. Since the first reference waveform is collected during the process of the diaphragm being in a standard installation state and the first control signal being output, it is possible to further determine whether the diaphragm is in a standard installation state, thereby identifying the state in which the diaphragm is not properly installed, so as to ensure the normal use of subsequent ventilation equipment.

[0100] It should be noted that the scheme for determining whether the diaphragm is in normal installation as defined in steps S26 to S29, S26 to S28, and S30 can also be applied to other embodiments of this application.

[0101] The above only refers to Figure 2 The methods shown and Figure 1 The differences between the methods shown will be described in detail, regarding Figure 2 For more information on the methods shown, please refer to the above section on... Figure 1 Related descriptions.

[0102] Example 3

[0103] Reference Figure 3 , Figure 3 This is a flowchart illustrating the third method for diaphragm installation and testing of ventilation equipment in the embodiments of this application. Figure 3 The diaphragm mounting inspection method shown may include the following steps:

[0104] Step S31: Output a second control signal, which is used to control the opening degree of the PEEP valve;

[0105] Step S32: During the control process, record the airway pressure and / or air flow rate to obtain the second detection waveform;

[0106] Step S33: Determine whether a diaphragm is installed at the air outlet based on the second detection waveform.

[0107] In step S31, the controller can output a second control signal. In this embodiment, the second control signal can be used to control the opening degree of the PEEP valve.

[0108] In this embodiment, during the process of outputting the second control signal to control the opening of the PEEP valve, the inlet pressure of the expiratory airway can be maintained at a constant value, which is greater than atmospheric pressure. Furthermore, the inlet flow rate of the expiratory airway can also remain constant.

[0109] In practice, the second control signal can be generated according to a pre-set control strategy. This embodiment does not limit the specific control strategy for the second control signal.

[0110] Furthermore, in the embodiments of this application, before outputting control signals (such as the first control signal, the second control signal, or the third control signal), a constant flow of gas can be delivered to the expiratory airway for a period of time, so that the detection waveform collected during the control process can have a more obvious change.

[0111] In the specific implementation of step S32, during the process of controlling the PEEP opening, the airway pressure or outflow of the expiratory airway can be acquired and recorded.

[0112] Specifically, during the control process based on the second control signal, the airway pressure or outflow of the expiratory airway can be recorded in real time, and the first detection waveform can be obtained when the control is completed according to the preset control strategy.

[0113] In the specific implementation of step S33, it is determined whether a membrane is installed in the expiratory airway based on the second detection waveform.

[0114] Specifically, if the second detection waveform matches the opening change of the PEEP valve, it can be determined that a diaphragm is installed on the PEEP valve; if the second detection waveform does not match the opening change of the PEEP valve, it can be determined that the diaphragm is not installed.

[0115] As an example, the second control signal can be used to increase the opening of the PEEP valve, and the second detection waveform is the airway pressure waveform.

[0116] Since the control strategy of the second control signal is to gradually increase the opening of the PEEP valve, the PEEP value gradually decreases. Correspondingly, if the rate of pressure drop in the airway also increases during the process of increasing the opening of the PEEP valve, it can be determined that the diaphragm is installed. If the rate of pressure drop remains unchanged during the process of increasing the opening of the PEEP valve, it can be determined that the diaphragm is not installed, i.e., the diaphragm is missing.

[0117] In the expiratory airway, there are usually structural factors other than the diaphragm that can cause leakage, resulting in a typical downward pressure trend. Based on this, the solution in this embodiment uses a control strategy of increasing the PEEP valve opening to determine whether the diaphragm is leaking, and judges whether the rate of pressure drop increases, rather than judging whether the pressure has dropped at all. This allows for more accurate identification of diaphragm leaks. Furthermore, compared to decreasing the PEEP valve opening, using a control strategy of increasing the opening makes pressure changes more noticeable, which also helps in accurately identifying diaphragm leaks.

[0118] In this embodiment, keeping the rate of pressure decrease constant can mean that the change in the rate of pressure decrease does not exceed a threshold. In other words, keeping the rate of pressure decrease constant can mean that the rate of pressure decrease remains approximately constant.

[0119] As another example, the control strategy corresponding to the second control signal is to control the PEEP valve from the closed state to open to the first opening degree, and then control the PEEP valve to close after opening to the first opening degree. This process is repeated a preset number of times, and the second detected waveform is the airway pressure waveform.

[0120] If the rate of pressure drop in the expiratory airway increases each time the PEEP valve opens from the closed state to the first opening degree, then the PEEP valve is confirmed to have a diaphragm. If, at least once, the rate of pressure drop in the expiratory airway remains constant during the PEEP valve's opening from the closed state to the first opening degree, then the PEEP valve is confirmed to not have a diaphragm. The closed state of the PEEP valve can refer to the state with the PEEP opening at its minimum, i.e., the controlled PEEP value is at its maximum.

[0121] In practice, the preset number of times can be 3 or 5 times, and this embodiment does not limit it.

[0122] As another example, the second control signal can be used to increase the opening of the PEEP valve, and the second detection waveform is the waveform of the outflow volume.

[0123] Since the control strategy of the second control signal is to gradually increase the opening of the PEEP valve, the PEEP value gradually decreases. If the diaphragm is installed, and the inlet flow rate or inlet pressure remains constant, the outlet flow rate should gradually increase. Accordingly, if the second detection waveform indicates that the outlet flow rate also increases as the PEEP valve opening is increased, it can be determined that the diaphragm is installed. If the second detection waveform indicates that the outlet flow rate remains constant as the PEEP valve opening is increased, it can be determined that the diaphragm is not installed, i.e., the diaphragm is missing.

[0124] For example, Figure 3 The method shown can be executed upon receiving a self-test signal. Alternatively, Figure 3 The method shown can also be used in Figure 1 The steps shown in step S12 are executed afterward, but are not limited to this. For example, if by executing... Figure 1 The judgment result and execution obtained by the method shown Figure 3 If the judgment results obtained by the method shown are consistent, the installation and testing of the diaphragm can be considered complete. If they are inconsistent, the process can be based on... Figure 3 The results obtained shall prevail, but are not limited to these.

[0125] The above mainly focuses on Figure 3 The methods shown and Figure 1 , Figure 2 The differences between the methods shown will be described in detail, regarding Figure 3 For more information on the methods shown, please refer to the above section on... Figure 1 and Figure 2 Related descriptions.

[0126] Example 4

[0127] Reference Figure 4 , Figure 4 This is a flowchart illustrating the fourth method for diaphragm installation and testing of ventilation equipment in the embodiments of this application. Figure 4 The method shown may include steps S41 to S43. Specifically:

[0128] Step S41: Output a third control signal, which is used to control the gas intake pressure to vary within a range greater than the PEEP value.

[0129] exist Figure 4In the illustrated scheme, the third control signal output by the controller can be used to control the intake pressure of the expiratory airway. In this embodiment, during the process of outputting the third control signal to control the intake pressure, the opening of the PEEP valve remains unchanged; that is, during the process of controlling the change in intake pressure, the PEEP value remains constant.

[0130] Furthermore, at least a portion of the range of intake pressure variation is greater than the PEEP value. For example, a third control signal can be used to control the intake pressure variation within a range greater than the PEEP value.

[0131] In specific implementation, the third control signal can be used to increase the intake pressure, or it can be used to decrease the intake pressure. Alternatively, the control signal can be used to first increase the intake pressure and then decrease it, etc. This embodiment does not limit the specific control strategy.

[0132] Step S42: During the control process, the airway pressure is recorded to obtain the third detection waveform.

[0133] Specifically, the pressure in the expiratory airway can be recorded in real time during the process of controlling the intake air pressure. When the intake pressure is controlled according to the preset control strategy, the third detection waveform can be obtained.

[0134] Step S43: Determine whether a diaphragm is installed at the air outlet based on the third detection waveform.

[0135] Specifically, the change in airway pressure in the expiratory airway during changes in inlet pressure greater than PEEP can be used to determine whether the diaphragm is missing.

[0136] If the inlet pressure varies within a range greater than PEEP, and the trends of the airway pressure and inlet pressure are consistent, then the diaphragm is likely missing. If the inlet pressure varies within a range greater than PEEP, but the airway pressure remains at PEEP, then the diaphragm is likely installed.

[0137] As an example, the third control signal can be used to control the intake air pressure to increase from a first pressure value to a second pressure value, where both the first and second pressure values ​​are greater than the PEEP value. If the third detection waveform indicates that the airway pressure also increases during the process of the intake air pressure increasing from the first pressure value to the second pressure value, it can be determined that the diaphragm is not installed. If the third detection waveform indicates that the airway pressure remains at the PEEP value during the process of the intake air pressure increasing from the first pressure value to the second pressure value, it can be determined that the diaphragm is installed.

[0138] In practice, considering that there are usually some factors that cause air leakage in the expiratory airway, maintaining the pressure in the expiratory airway at the PEEP value can mean that the pressure is roughly maintained at the PEEP value or slightly less than the PEEP value.

[0139] In other embodiments, the third control signal can also be used to control the gas intake flow rate, thereby controlling the intake pressure to vary within a range greater than the PEEP value.

[0140] For example, Figure 4 The method shown can be executed upon receiving a self-test signal. Alternatively, Figure 4 The method shown can also be used in Figure 1 The steps shown in step S12 are performed afterward, but are not limited to this.

[0141] The above mainly focuses on Figure 4 The methods shown and Figures 1 to 3 The differences between the methods shown will be described in detail, regarding Figure 4 More details on the diaphragm installation and testing method for ventilation equipment shown above can be found in the relevant description above, and will not be repeated here.

[0142] Example 5

[0143] Reference Figure 6 , Figure 6 This is a flowchart illustrating the fifth method for diaphragm installation and testing of ventilation equipment in the embodiments of this application. Figure 6 The illustrated membrane installation detection method may include steps S61 to S62, or may include steps S61, S63 and S64.

[0144] Step S61: If the initial pressure waveform indicates that the airway pressure is less than or equal to the minimum pressure threshold, then increase the gas intake flow rate.

[0145] For details regarding the initial pressure waveform, please refer to [link / reference needed]. Figure 1 The relevant descriptions will not be repeated here.

[0146] Specifically, even after increasing the intake flow rate, the intake pressure in the expiratory airway remains lower than the PEEP value. In step S61, the intake flow rate can be increased to a first preset flow rate value. When the intake flow rate is at this first preset flow rate value, the intake pressure in the expiratory airway remains lower than the PEEP value. Here, the PEEP value refers to the PEEP value set during the acquisition of the initial pressure waveform.

[0147] Step S62: After increasing the gas inlet flow rate, if the outlet flow rate is greater than the flow rate threshold, it is determined that the diaphragm is not installed at the outlet.

[0148] Specifically, if a diaphragm is installed at the outlet, the outlet should be blocked because the inlet pressure is less than the PEEP value, and no gas should flow out. Therefore, after increasing the inlet gas flow rate, if the outlet flow rate is detected to be greater than a flow threshold, it can be determined that the diaphragm is not installed. This flow threshold can be preset. For example, the flow threshold can be greater than 0.

[0149] Step S63: After increasing the gas inlet flow rate, if the outlet flow rate is less than or equal to the flow rate threshold, then close the PEEP valve and continue to increase the gas inlet flow rate.

[0150] Specifically, if the outflow rate is less than or equal to the flow rate threshold, it may be due to the installation of a diaphragm, which may block the outlet, or it may be due to a leak in the expiratory airway before the outlet, through which gas flows out, resulting in a smaller gas flow rate at the outlet.

[0151] Therefore, in this embodiment, the gas intake flow rate is further increased; that is, the intake flow rate is further increased based on step S61. For example, the intake flow rate can be increased from a first preset flow rate value to a second preset flow rate value, where the second preset flow rate value is greater than the first preset flow rate value.

[0152] In addition, step S63 also involves closing the PEEP valve. As mentioned above, the closed state of the PEEP valve can refer to the state where the PEEP opening is at its minimum, that is, the controlled PEEP value is at its maximum value. Closing the PEEP valve also means setting the PEEP value to its maximum value.

[0153] In step S63, on the one hand, by setting the PEEP valve to its maximum value, it can be ensured that when the diaphragm is installed, the diaphragm isolates the outlet from the atmosphere, that is, the outlet is in a blocked state. On the other hand, by continuing to increase the air intake flow rate, a large air intake flow rate is achieved, so that even if the leakage at other leakage points is large, the air intake flow rate can still be detected at the outlet if the diaphragm is not installed.

[0154] Step S64: After closing the PEEP valve and continuing to increase the gas inlet flow rate, if the outlet flow rate is zero, it is determined that the diaphragm is installed at the outlet; if the outlet flow rate remains unchanged, it is determined that the diaphragm is not installed at the outlet.

[0155] Specifically, after closing the PEEP valve and continuing to increase the air intake flow, the air output flow is zero, indicating that no gas is flowing out of the outlet and the outlet is blocked. Therefore, it can be determined that a diaphragm is installed at the outlet.

[0156] If the outlet flow rate remains constant, it can be determined that the diaphragm is not installed. "Remaining constant outlet flow rate" can mean that the outlet flow rate is not zero, but is less than or equal to a flow threshold. In other words, "remaining constant outlet flow rate" means that the gas flow rate has remained essentially unchanged compared to the outlet flow rate detected after the first increase in the inlet flow rate in step S61. In other words, if, after closing the PEEP valve and continuing to increase the inlet flow rate, the outlet flow rate remains less than or equal to the flow threshold and is not zero, it can be determined that no diaphragm is installed at the outlet.

[0157] As shown above, the solution provided in this embodiment can identify situations where gas leaks out from other points in the exhalation airway, which helps to ensure the accuracy of diaphragm leakage detection.

[0158] Example 6

[0159] Reference Figure 5 , Figure 5 This is a schematic diagram of the structure of a diaphragm installation detection device for ventilation equipment in an embodiment of this application. Figure 5 The illustrated diaphragm installation detection device can be deployed in the controller of a ventilation device. The ventilation device includes an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet. Figure 5 The apparatus shown may include:

[0160] The acquisition module 51 is used to record the airway pressure in the expiratory airway during the process of inputting gas from the air inlet to the expiratory airway, and obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve.

[0161] The processing module 52 is used to determine whether the diaphragm is installed at the outlet of the expiratory airway based on the initial pressure waveform.

[0162] In specific implementation, the diaphragm installation detection device for ventilation equipment mentioned above can correspond to a chip with data processing function in the controller; or to a chip module with data processing function in the controller; or to the controller itself.

[0163] For more details regarding the working principle, working method, and beneficial effects of the diaphragm installation detection device for ventilation equipment in the embodiments of this application, please refer to the relevant description of the diaphragm installation detection method for ventilation equipment above, which will not be repeated here.

[0164] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it performs the steps of the above-described method for detecting diaphragm installation in a ventilation device. The storage medium may include ROM, RAM, a magnetic disk, or an optical disk, etc. The storage medium may also include non-volatile memory or non-transitory memory, etc.

[0165] This application also provides a controller, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor runs the computer program, it performs the steps of the diaphragm installation detection method for ventilation equipment described above. The controller can be a controller for ventilation equipment.

[0166] This application embodiment also provides a ventilation device, which may include the controller, PEEP valve and expiratory airway described above, the expiratory airway having an inlet and an outlet; it may also include the expiratory valve described above.

[0167] It should be understood that in the embodiments of this application, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0168] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0169] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means.

[0170] In the several embodiments provided in this application, it should be understood that the disclosed methods, apparatus, and systems can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and other division methods may exist in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0171] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can be physically included separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or in a combination of hardware and software functional units. For example, for various devices or products applied to or integrated into a chip, each module / unit can be implemented using hardware such as circuits, or at least some modules / units can be implemented using software programs running on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware such as circuits; for various devices or products applied to or integrated into a chip module, each module / unit can be implemented using hardware such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0172] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0173] In this application's embodiments, "multiple" refers to two or more. The descriptions of "first," "second," etc., appearing in this application's embodiments are merely illustrative and for distinguishing the described objects; they do not indicate any order and do not imply a specific limitation on the number of devices in this application's embodiments, nor do they constitute any limitation on the embodiments of this application. Although this application discloses the above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

[0174] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. A method for testing the installation of diaphragms in ventilation equipment, characterized in that, The ventilation device includes an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet, and the method includes: During the process of inputting gas from the air inlet into the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve. Based on the initial pressure waveform, determine whether the diaphragm is installed at the outlet of the expiratory airway. If the airway pressure is greater than the minimum pressure threshold, then it can be determined that the diaphragm has been installed. If the initial pressure waveform indicates that the airway pressure is less than or equal to the minimum pressure threshold, then the gas intake flow rate is increased, wherein the intake pressure is still less than the PEEP value after increasing the intake flow rate; If, after increasing the gas inlet flow rate, the outlet flow rate is greater than the flow rate threshold, it is determined that the diaphragm is not installed at the outlet. After increasing the gas inlet flow rate, if the outlet flow rate is less than or equal to the flow rate threshold, then close the PEEP valve and continue to increase the gas inlet flow rate. After closing the PEEP valve and continuing to increase the gas inlet flow rate, if the outlet flow rate is zero, it is determined that the diaphragm is installed at the outlet; if the outlet flow rate remains unchanged, it is determined that the diaphragm is not installed at the outlet.

2. A method for testing the installation of diaphragms in ventilation equipment, characterized in that, The ventilation device includes an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet, and the method includes: During the process of inputting gas from the air inlet into the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve. Based on the initial pressure waveform, determine whether the diaphragm is installed at the outlet of the expiratory airway. Output a second control signal, which is used to increase the opening degree of the PEEP valve; During the control process, the airway pressure and / or airflow rate are recorded to obtain the second detection waveform; If the second detection waveform indicates that the rate of airway pressure drop also increases or the outflow rate of the outlet also increases after increasing the opening of the PEEP valve, then it is determined that the diaphragm is installed on the expiratory airway. If the second detection waveform indicates that the rate of decrease in airway pressure remains unchanged or the outlet flow rate remains unchanged after increasing the opening of the PEEP valve, then it is determined that the diaphragm is not installed at the outlet.

3. A method for testing the installation of diaphragms in ventilation equipment, characterized in that, The ventilation device includes an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet, and the method includes: During the process of inputting gas from the air inlet into the expiratory airway, the airway pressure in the expiratory airway is recorded to obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve. Based on the initial pressure waveform, determine whether the diaphragm is installed at the outlet of the expiratory airway. A third control signal is output, which is used to control the gas intake pressure to vary within a range greater than the PEEP value; During the control process, the airway pressure is recorded to obtain the third detection waveform; If the third detection waveform indicates that the trend of change of the airway pressure is consistent with the trend of change of the inlet pressure, then it is determined that the diaphragm is not installed at the outlet. If the third detection waveform indicates that the airway pressure is maintained at the PEEP value, then it is determined that the diaphragm is installed at the air outlet.

4. The diaphragm installation detection method according to any one of claims 1-3, characterized in that, The method further includes: If it is determined that the diaphragm is installed at the air outlet, a first control signal is output. The first control signal is used to control the opening degree of the PEEP valve or to control the air intake pressure. During the control process, the airway pressure or airflow rate is recorded to obtain the first detection waveform; The installation status of the diaphragm is determined based on the first detection waveform.

5. The diaphragm installation detection method according to claim 4, characterized in that, Determining the installation status of the diaphragm based on the first detection waveform includes: Determine whether the first detected waveform and the first reference waveform are similar. If the determination result is yes, then the diaphragm is determined to be in a standard installation state. If the determination result is no, then the diaphragm is determined to be in an abnormal installation state. The first reference waveform is acquired during the process when the diaphragm is in a standard installation state and the first control signal is output.

6. A diaphragm installation detection device for ventilation equipment, characterized in that, The ventilation device includes an expiratory airway and a PEEP valve, the expiratory airway having an inlet and an outlet, the device comprising: The acquisition module is used to record the airway pressure in the expiratory airway during the process of inputting gas from the air inlet to the expiratory airway, and obtain an initial pressure waveform. The gas inlet pressure is less than the PEEP value set by the PEEP valve. The processing module is used to execute the membrane installation detection method for ventilation equipment according to any one of claims 1 to 5, and to determine whether the diaphragm is installed at the outlet of the expiratory airway.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run by the processor, it performs the steps of the diaphragm installation detection method for ventilation equipment as described in any one of claims 1 to 5.

8. A controller comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor runs the computer program, it performs the steps of the diaphragm installation detection method for ventilation equipment as described in any one of claims 1 to 5.

9. A ventilation device, characterized in that, include: An expiratory airway and a PEEP valve, wherein the expiratory airway has an inlet and an outlet; A controller for performing the steps of the diaphragm installation detection method for a ventilation device as described in any one of claims 1 to 5.

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