A powered air supply respirator equipped with an air pressure sensor and a monitoring method

Abstract

The present invention discloses an electric air-supplying respirator equipped with an air pressure sensor and a monitoring method. By adopting multiple air pressure sensors, the filter resistance and the air pressure of the blower in the respirator are monitored, thereby realizing the monitoring and alarm function of the filter element resistance and the overall breathing resistance of the respirator. When an abnormal working condition such as a high degree of blockage of the filter element or excessive resistance at the air outlet occurs, an alarm is promptly issued to the user through a display screen and a buzzer alarm, thereby improving the reliability of the powered air-supplying filtering respirator in use. At the same time, the control panel of the electric air-supplying respirator of the present invention provides two wireless network connection modes, WIFI and Bluetooth. The user can set the control panel program through the wireless network, thereby setting the corresponding normal working range and alarm value according to the filter element used, thereby improving the accuracy and convenience of monitoring the blockage degree of the filter element and improving the adaptability of the filter element consumables.

Description

Technical Field

[0001] The present invention relates to the technical field of personal protection, and more particularly to an electrically powered air-supplying respirator equipped with an air pressure sensor and a monitoring method. Background Art

[0002] Powered air-purifying respirators (PAPRs) are widely used as respiratory protection equipment for dust control in specialized environments and for viral particle protection in medical epidemic prevention work. The filter element, a key component of the respirator, directly affects the effectiveness of dust and other particulate matter filtration and the clean air flow rate after filtration. To ensure safe use and compliance with relevant national mandatory standards, the air resistance of the filter element, or the degree of filter clogging, must be monitored throughout use to ensure that the air resistance and clean air flow meet the required requirements. Currently, most such devices on the market indirectly determine the degree of filter clogging by monitoring changes in the blower power. However, this reliability and flexibility are limited, impacting the safety of the respirator. Furthermore, the respirator must be set to the appropriate air volume setting based on the type of respirator being used, ensuring it is suitable for either a closed or open face mask. In actual use, manual setting errors can lead to insufficient air volume, compromising the respirator's protective effectiveness.

[0003] Therefore, how to improve the safety and applicability of respirators is an urgent problem that those skilled in the art need to solve. Summary of the Invention

[0004] In view of this, the present invention provides an electric air-supplying respirator equipped with an air pressure sensor and a monitoring method. By adopting multiple air pressure sensors, the filter resistance and the air pressure of the blower in the respirator are monitored, thereby realizing the monitoring and alarm function of the filter element resistance and the overall breathing resistance of the respirator. The blower automatically adjusts the air volume based on the type of breathing mask connected to the air outlet, and when there are abnormal working conditions such as high blockage of the filter element and excessive resistance of the air outlet, an alarm is promptly issued to the user through the display screen and the buzzer alarm, thereby improving the reliability of the powered air-supplying filtering respirator in use; at the same time, the control panel of the electric air-supplying respirator of the present invention provides two wireless network connection modes, WIFI and Bluetooth. The user can set the control panel program through the wireless network, thereby setting the corresponding normal working range and alarm value according to the filter element used, thereby improving the accuracy and convenience of monitoring the blockage degree of the filter element and improving the adaptability of the filter element consumables.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An electrically powered air-supply respirator equipped with an air pressure sensor comprises a filter element, a main unit front panel, a rear shell, and a breathing mask; the main unit front panel is provided with an air inlet, an air pressure sensor, a blower, and a control panel;

[0007] The filter element is fastened and fixed on the front side of the main unit front panel, and the air inlet is located on the side of the main unit front panel where the filter element is fastened;

[0008] The blower and the control panel are mounted on the back panel of the host front panel, the blower air inlet extends to the air inlet, and the air outlet extends out from the side of the host front panel;

[0009] The air pressure sensor and the blower are both electrically connected to the control board;

[0010] The rear shell is buckled on the rear side of the host front panel, covering the blower and the control panel;

[0011] The air outlet pipeline is connected to the breathing mask.

[0012] The technical effect of the above technical solution is that the air pressure between the filter element and the front panel of the main unit, that is, the air pressure value near the air inlet, is collected through the air inlet pressure sensor, and the air pressure value near the air outlet of the blower is collected through the air outlet pressure sensor. The blockage degree of the filter element is monitored according to the measured static pressure difference, and the resistance of the clean air after filtration is monitored, thereby realizing automatic adjustment of the flow rate of the blower, and the appropriate breathing mask model can be selected according to the current measurement.

[0013] Preferably, the air pressure sensor includes a blower front-end air pressure sensor located in the front panel area of ​​the main unit where the air inlet and the sealing edge of the main unit are located. The sensor is embedded in the main unit front panel, and the measuring end is located in the area surrounded by the air inlet and the sealing edge on the main unit front panel. The air pressure at the blower front-end air pressure sensor is used to measure the air pressure when the blower is stationary and when it is operating, and the degree of obstruction of the powered air respirator is determined based on the pressure difference.

[0014] Preferably, the air pressure sensor includes a rear-end air pressure sensor for the blower, which is located on the blower outlet duct, and the measuring end is embedded in the blower outlet duct. It is used to measure the static pressure of the blower outlet duct. The rear-end air pressure sensor for the blower is located on the rear end of the fan impeller or on the exhaust duct. Due to the different resistance characteristics of the pipes and respiratory masks connected to the air outlet, the air pressure values ​​of different models of respiratory masks after being connected to the air outlet duct will be different. After the respirator is started, it is first at a specified speed. The program burned into the control board reads the air pressure values ​​of the blower at rest and when the blower is working, and obtains the static pressure difference by taking the difference, determines the clean air resistance after filtration, and determines the model of respiratory mask to be configured in combination with the stored data value. The stored data value is the range of clean air resistance values ​​after filtration corresponding to different models of respiratory masks at a certain speed. Then, the air flow rate is changed by adjusting the blower speed to achieve the optimal working flow adjustment suitable for different models of respiratory masks.

[0015] Preferably, the air pressure sensor includes a front-end air pressure sensor for the blower and a rear-end air pressure sensor for the blower; the front-end air pressure sensor for the blower is located on the sealed edge of the main unit front panel and the area of ​​the main unit front panel where the air inlet is located, is embedded in the main unit front panel, and the measuring end is located in the area surrounded by the air inlet and the sealed edge on the main unit front panel; the rear-end air pressure sensor for the blower is located on the air outlet duct of the blower, and the measuring end is embedded in the air outlet duct of the blower. By measuring the air pressure at the air inlet and the air outlet when the blower is operating, the static pressure difference is obtained, and the resistance of the clean air after filtration is determined.

[0016] Preferably, a trigger device is further provided on the side of the front panel of the host, the trigger device being electrically connected to the control panel; the trigger device includes a control button, and the electric air supply respirator is triggered to operate by the trigger device.

[0017] Preferably, a debugging interface is further provided, which is located on the surface of the rear shell and is electrically connected to the control board, and is used for debugging the working parameters of the powered air supply respirator.

[0018] Preferably, a rechargeable battery is further provided, fixed to the rear side of the front panel of the host and electrically connected to the control board.

[0019] Preferably, a display screen is provided, which is located on the side of the main unit front panel and is electrically connected to the control panel, and is used to display the remaining power of the rechargeable battery, the degree of clogging of the filter element and alarm information.

[0020] Preferably, the control panel includes an integrated main control chip, a buzzer, and a vibration motor; the integrated main control chip integrates a wireless network module and a Bluetooth module; the buzzer and the vibration motor are both electrically connected to the integrated main control chip. The wireless network module and the Bluetooth module are used to remotely control and update the control panel's program, while the buzzer and vibration motor can provide audible and vibrating alarms.

[0021] Preferably, the form of the filter element is not limited to the material of the filter screen and the geometric structure of the shell, including a folded particulate filter screen and / or a filter cartridge.

[0022] A method for monitoring a powered air respirator equipped with an air pressure sensor comprises the following steps:

[0023] Step 1: Collect the air pressure values ​​of the powered air respirator when it is stationary and when it is working;

[0024] Step 2: Difference the different air pressure values ​​to obtain the static pressure difference;

[0025] Step 3: Determine the working status of the powered air respirator based on the static pressure difference, adjust the blower speed, and select a matching breathing mask.

[0026] Preferably, the air pressure sensor at the front end of the blower measures the static pressure value of the air pressure when the blower is stationary and the static pressure value of the air pressure when it is running at a set speed, and makes a difference to obtain the blocking static pressure difference. The blocking static pressure difference corresponds to the degree of blockage of the filter element of the electric air supply respirator. The degree of blockage of the filter element screen is proportional to the blocking static pressure difference. The degree of blockage can be judged by the blocking static pressure difference.

[0027] Preferably, when the blower runs at a set speed, the air pressure sensor at the front end of the blower and the air pressure sensor at the rear end of the blower are used to respectively measure the static pressure value of the air inlet and the static pressure value of the air outlet, and the difference is taken to obtain the resistance static pressure difference, which is then subtracted from the blockage static pressure difference obtained by measuring only the air pressure sensor at the front end of the blower to obtain the resistance static pressure difference after filtration. There is a corresponding relationship between the resistance static pressure difference and the clean air resistance after filtration, and the clean air resistance after filtration is proportional to the resistance static pressure difference. Therefore, the clean air resistance after filtration can be judged by the resistance static pressure difference.

[0028] Preferably, the air pressure sensor at the rear end of the blower measures the static pressure value of the air outlet of the air outlet duct of the blower when the blower is stationary. The blower operates at different speeds, corresponding to different static pressure values ​​of the air outlet of the air outlet duct of the blower. The static pressure value of the air outlet when the blower is running is different from the static pressure value of the air outlet when the blower is stationary (i.e., the current atmospheric pressure value) to obtain the resistance of clean air after filtration. According to this value, different types of breathing masks can be selected for adaptation, and the working flow rate can also be adjusted by adjusting the speed of the blower according to work needs.

[0029] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a powered air supply respirator equipped with an air pressure sensor and a monitoring method. Multiple air pressure sensors are used to monitor the filter element blockage degree and air outlet resistance. When an abnormality occurs, such as a high filter element blockage degree or excessive air outlet resistance, the user is promptly alerted via a display screen and a buzzer alarm. The measured air outlet resistance is used to determine the model of the connected respiratory mask, and the blower speed is adjusted accordingly to achieve automatic flow control. The control panel also provides two wireless network connection methods: WIFI and Bluetooth. Users can set the control panel program via the wireless network and set the appropriate normal operating range and alarm value based on the actual filter element being used. This improves the accuracy of filter element blockage monitoring and the convenience of use, and improves the adaptability of filter element consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] Figure 1 The accompanying drawing is a schematic diagram of the overall structure of the powered air supply respirator equipped with an air pressure sensor provided by the present invention;

[0032] Figure 2 The accompanying drawing is an overall exploded view of the powered air supply respirator equipped with an air pressure sensor provided by the present invention;

[0033] Figure 3 The accompanying drawing is a front view of the front panel of the main unit of the powered air supply respirator provided by the present invention;

[0034] Figure 4 The accompanying drawing is a rear view of the front panel of the main unit of the powered air supply respirator provided by the present invention;

[0035] Figure 5 The accompanying drawing is a front view of the powered air supply respirator provided by the present invention;

[0036] Figure 6 The accompanying drawing is a left side view of the powered air supply respirator provided by the present invention;

[0037] Figure 7 The accompanying drawing is a right side view of the powered air supply respirator provided by the present invention;

[0038] Figure 8 The accompanying drawing is a top view of the powered air supply respirator provided by the present invention.

[0039] In the accompanying drawings: 1-filter element, 2-host front panel, 21-air inlet, 22-air pressure sensor at the front end of the blower, 23-blower, 231-air outlet, 24-air pressure sensor at the rear end of the blower, 25-control panel, 26-control button, 27-debugging interface, 28-rechargeable battery, 29-display screen, 3-back cover. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] The embodiment of the present invention discloses an electric air supply respirator equipped with an air pressure sensor and a monitoring method. The overall structure is as follows: Figure 1 As shown, the components are as follows Figure 2 As shown, it includes a filter element 1, a main unit front panel 2, a rear shell 3 and a breathing mask; the main unit front panel 2 is provided with an air inlet 21, an air pressure sensor, a blower 23 and a control panel 25; the filter element 1 is snap-fitted and fixed to the front side of the main unit front panel 2, and the air inlet 21 is located on the side of the main unit front panel 2 where the filter element 1 is snapped in; the blower 23 and the control panel 25 are installed on the rear side of the main unit front panel 2, the blower air inlet extends to the air inlet 21, and the air outlet 231 extends out of the upper side of the main unit front panel 2; the air pressure sensor and the blower 23 are both electrically connected to the control panel 25; the rear shell 3 is snap-fitted to the rear side of the main unit front panel 2, sealing the blower 23 and the control panel 25; the air outlet 231 pipeline is connected to the breathing mask.

[0042] Example 1

[0043] As shown in the figure, when the powered air respirator of the present invention is in use, the filter element 1 and rear shell 3 are fixedly mounted on the main unit front panel 2 via a snap-fit ​​mechanism, squeezing each other to achieve a seal. The filter element 1 is not limited to the geometric structure shown in the figure. A rechargeable battery 28 is mounted on the rear side of the main unit front panel 2 and connected to the control board 25. When the main unit front panel 2 and rear shell 3 are fastened together, the rechargeable battery 28 is located inside the rear shell 2 and serves as the power source for the respirator. The control board 25 is equipped with an integrated main control chip, model ESP32, which integrates Wi-Fi and Bluetooth transmission functions and is programmed with a stored control program.

[0044] The user uses the control button 26 located on the front panel 2 of the main unit to select the model of the filter element 1 preset in the program burned into the control panel 25 and start the power supply of the blower 23. Then the blower 23 located inside the front panel 1 of the main unit starts and forms a negative pressure at the air inlet 21. Due to the negative pressure inside the respirator, the air is filtered by the filter element 1, and pollutants such as particulate matter in the air are filtered and adsorbed. The clean air is then sucked into the air inlet 21, and after being rotated and pressurized by the blower 23, it is discharged from the air outlet 231 and provided to the user for breathing through pipelines and other means.

[0045] When the electric air-supply respirator is working, the program of the control panel 25 will read the real-time power value of the rechargeable battery 28 and display the remaining power value in the form of icons and text through the display screen 29. When the real-time power value is lower than the preset value of the program, the low power alarm information will be displayed through the display screen 29. At the same time, the buzzer on the control panel 25 will sound an alarm at the preset power buzzer alarm frequency and start the vibration motor on the control panel 25. When the vibration motor is running, the vibration generated at the preset power vibration alarm frequency will alert the user.

[0046] Example 2

[0047] The present invention has the function of monitoring and alarming the blockage degree of the filter element, and the implementation method is as follows:

[0048] The air pressure sensor includes an air pressure sensor 22 at the front end of the blower, which is located on the front panel area of ​​the host where the sealing edge of the front panel 2 and the air inlet 21 are located, and is embedded in the front panel 2 of the host. The measuring end is located in the area surrounded by the air inlet 21 and the sealing edge on the front panel 2 of the host, and its signal line is connected to the control board 25.

[0049] After the powered air respirator is activated, the blower 23 is initially stopped. A program embedded in the control panel 25 measures the current static pressure, P0, (i.e., atmospheric pressure), using the pressure sensor 22 at the front of the blower. The program then controls the blower 23 to start and operate at a specified speed. Due to the suction force of the blower 23, the air pressure in the space between the filter element 1 and the main unit's front panel 2 becomes negative, and the pressure sensor 22 at the front of the blower measures the static pressure, P1, at this location. The program calculates the difference, P2, between the static pressure, P0, before startup and the static pressure, P1, during operation of the blower 23. This difference is used as the resistance to air flow through the filter element 1. This difference is then compared with the resistance, P3, of an unobstructed filter element at that speed, pre-stored in the program and measured through experiments. This determines the degree of blockage in the filter element 1. While the powered air respirator is operating, the control panel 25 program displays the degree of blockage in real time, using both graphical and textual information, on a display screen 29 connected to the control panel 25 for easy viewing by the user.

[0050] When the degree of clogging of the filter element 1 is greater than the preset value in the program, the display screen 20 displays an alarm message in the form of graphics and text. At the same time, the buzzer on the control panel 25 will emit an alarm sound according to the preset clogging buzzer alarm frequency, and start the vibration motor on the control panel 25. When the vibration motor is running, the vibration generated according to the preset clogging alarm vibration frequency will alert the user.

[0051] Example 3

[0052] The present invention utilizes an air pressure sensor to realize the resistance monitoring function of the clean air after filtration, and the implementation method is as follows:

[0053] The air pressure sensor includes a front-end air pressure sensor 22 of the blower and a rear-end air pressure sensor 24 of the blower; the front-end air pressure sensor 22 of the blower is located on the area of ​​the main unit front panel 2 where the sealing edge of the main unit front panel 2 and the air inlet 21 are located, and is embedded in the main unit front panel 2, and the measuring end is located in the area surrounded by the air inlet 21 and the sealing edge on the main unit front panel 2; the rear-end air pressure sensor 24 of the blower is located on the outlet pipe of the blower 23, and the measuring end is embedded in the outlet pipe of the blower.

[0054] When the blower 23 of the powered air respirator operates at a specified speed, the rear-end air pressure sensor 24 located on the duct at the air outlet 231 of the blower 23 will measure the static pressure value P4 inside the duct at that location in real time. The program in the control board 25 calculates the difference between the static pressure value P4 measured by the rear-end air pressure sensor 24 and the static pressure value P1 measured by the front-end air pressure sensor 22, thereby obtaining the inlet and outlet static pressure difference P5, i.e., P5 = P4 - P1. Because the air flow from the air inlet 21 to the air outlet 231 is a closed pipe network with essentially no flow loss, ignoring the inlet and outlet dynamic pressure difference, the static pressure value P5 can be used to approximate the air pressure head when the blower 23 is in operation.

[0055] Wind pressure head, or working capacity, is determined by dynamic pressure and static pressure. Dynamic pressure is determined by flow velocity, but because the actual inlet and outlet areas are not completely consistent, the actual dynamic pressures at the inlet and outlet will not be completely equal. In this invention, static pressure is the primary means of discrimination, ignoring the influence of dynamic pressure for practical engineering purposes, and using the fact that static pressure difference is proportional to resistance to achieve determination.

[0056] The wind pressure head of the blower 23 in the duct is equal to the resistance of air flowing through the entire duct. This is also known from the principles of fluid dynamics. Although there is a certain error between the theoretical value of fluid dynamics and the value collected in actual application, the error can be ignored, or it can be determined in advance through experiments and stored in the program as a preset reference value. Then, resistance monitoring and judgment are implemented based on the relationship that resistance is proportional to static pressure. The total duct resistance includes the resistance of the filter element 1, the resistance of the duct between the air inlet 21 and the air outlet 231, and the resistance of accessories such as the user's duct connected to the rear end of the air outlet 231 and the breathing mask. The resistance of the filter element 1 is the static pressure difference P2, which is the difference P2 between the static pressure value P0 before startup and the static pressure value P1 during the operation of the blower 23. The control board 25 calculates the difference between the static pressure value P5 of the total duct resistance and the static pressure value P2 of the filter element 1 resistance through program execution, and obtains the approximate resistance value P6 of the remaining duct excluding the filter element resistance value, that is, P6 = P5 - P2.

[0057] When a user connects a pipe, breathing mask, or other accessories to the rear end of air outlet 21 for breathing, the structure between air inlet 21 and air outlet 231 remains unchanged, and the pipe resistance is proportional to the air volume. That is, the pipe resistance coefficient between air inlet 21 and air outlet 231 remains unchanged. At a constant blower speed, increased resistance reduces flow, and reduced flow reduces resistance in the fixed pipe structure, achieving dynamic equilibrium. However, overall resistance still increases. Changes in resistance value P6 are primarily affected by the pipe, mask, and other accessories connected to the rear end of air outlet 231. The control board 25 runs a program that compares a pre-stored reference resistance value with P6 to determine whether P6 is increasing or decreasing, and then performs resistance monitoring and judgment.

[0058] When P6 increases beyond the pre-stored allowable range value, it is determined that the pressure of the pipe, breathing mask and other accessories connected to the rear end of the air outlet 231 exceeds the upper limit, and the display screen 29 displays an alarm message of excessive breathing resistance and insufficient air flow in the form of graphics and text information. The buzzer on the control panel 25 will simultaneously sound an alarm according to the preset resistance buzzer alarm frequency, and start the vibration motor on the control panel 25. When the vibration motor is running, the vibration generated according to the preset resistance vibration alarm frequency will alert the user.

[0059] When the change in P6 decreases beyond the allowable range, it is determined that the pressure of the pipe, breathing mask, and other accessories connected to the rear end of air outlet 231 is too low, primarily due to leakage caused by an unsealed connection between the pipe and breathing mask. The program displays an alarm message indicating a connection failure or leakage at the rear end of air outlet 231 via display screen 29 in the form of graphics and text. A buzzer on control panel 25 simultaneously sounds an alarm at a preset pressure buzzer alarm frequency, and activates a vibration motor on control panel 25. The vibration motor, when in operation, generates vibrations at the preset pressure vibration alarm frequency to alert the user.

[0060] Further optimizing the above specific technical solution, the display screen graphics can distinguish different alarms. Furthermore, differentiating alarms can be achieved by combining different frequencies and durations of the buzzer and vibration motor. For example, a low battery alarm will produce three short, repeating beeps. A blockage alarm can produce two long, one short beep or vibration. If two or more alarms are present simultaneously, they will alternate.

[0061] Example 4

[0062] The air pressure sensor includes a pressure sensor 24 at the rear end of the blower, located on the outlet duct of blower 23, with the measuring end embedded in the duct. This sensor measures the outlet pressure both when the powered respirator is idle and when it is operating. The difference in pressure is used to determine the resistance of the filtered clean air. This resistance is then used to match the appropriate respirator mask and adjust the speed of blower 23 as needed to adjust the air volume.

[0063] Example 5

[0064] The present invention can use the air pressure sensor to identify the model of the breathing mask connected to the air outlet and automatically adjust the air volume. The specific implementation process is as follows:

[0065] As described in Example 3, when the blower 23 of the electric air-supply respirator maintains a specified speed, when the user connects a pipe, a breathing mask and other accessories to the rear end of the air outlet 21 for breathing, since the structure between the air inlet 21 and the air outlet 231 remains unchanged, and the pipe resistance is proportional to the air volume, that is, the pipe resistance coefficient between the air inlet 21 and the air outlet 231 remains unchanged, the blower speed is constant, the increase in resistance affects the reduction in flow rate, and the reduction in flow rate affects the reduction in resistance of the fixed pipe structure, achieving dynamic balance, but the overall resistance still increases. At this time, the change in resistance value P6 is mainly affected by the pipe, mask and other accessories connected to the rear end of the air outlet 231; and when the model and length of the pipe connected to the rear section of the air outlet 231 are constant, the change in P6 is mainly affected by the change in resistance of the breathing mask, that is, different models of breathing masks used cause P6 to change, and at this time P6 is proportional to the resistance of the breathing mask.

[0066] Since different types of open masks, closed masks, etc. correspond to different pipe network resistance characteristics, the resistance of the breathing mask at different blower speeds, that is, the static pressure value, is pre-determined through experiments; after multiplying by the proportional coefficient, a certain tolerance range is given as the resistance parameter data and pre-stored in the program of the control board 25.

[0067] During operation, the control panel 25 program determines the current mask model by comparing the P6 value with a pre-stored range of resistance parameters corresponding to different mask models. The optimal blower speed values ​​corresponding to each mask model are pre-stored in the program. Based on the identified mask model, the control panel 25 program adjusts the blower speed to the optimal speed for that mask model, achieving both mask recognition and automatic airflow adjustment.

[0068] Example 6

[0069] The present invention can realize the adaptation function of the filter element and the equipment modification and upgrade function. The specific implementation process is as follows:

[0070] In actual use, powered air respirators have filter elements 1 with various specifications and filter resistance values. To adapt the respirator to various filter element 1 operating conditions, a debugging interface 27 is provided on the side of the respirator's rear housing 3, which connects to the control board 25. Users can connect an external computer or other device to the debugging interface 27 via a data cable to configure and update the program built into the control board 25, add different filter element resistance values ​​to the program, or modify other preset operating parameters to adapt to different filter element 1 specifications.

[0071] The control panel 25 includes both a wireless network transmitting component and a Bluetooth component, providing the control panel 25 with wireless network connection settings and upgrade functions. Users can connect their mobile devices to the control panel 25 of the electric air-supply respirator via a WIFI wireless network or a Bluetooth network, and use the mini-programs or web pages installed on the mobile device to set up and upgrade the programs in the control panel 25.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0073] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A powered air supply respirator equipped with an air pressure sensor, characterized in that: It includes a filter element, a main unit front panel, a rear shell and a breathing mask; the main unit front panel is provided with an air inlet, an air pressure sensor, a blower and a control panel; The filter element is fastened and fixed on the front side of the main unit front panel, and the air inlet is located on the side of the main unit front panel where the filter element is fastened; The blower and the control panel are mounted on the back panel of the host front panel, the blower air inlet extends to the air inlet, and the air outlet extends out from the side of the host front panel; The air pressure sensor and the blower are both electrically connected to the control board; The rear shell is buckled on the rear side of the host front panel to seal the blower and the control panel; The air outlet is connected to the breathing mask; The air pressure sensor includes a front-end air pressure sensor for the blower and a rear-end air pressure sensor for the blower; the front-end air pressure sensor for the blower is located on the front panel area of ​​the host where the sealing edge of the front panel and the air inlet are located, embedded in the front panel of the host, and the measuring end is located in the area surrounded by the air inlet and the sealing edge on the front panel of the host; the rear-end air pressure sensor for the blower is located on the air outlet pipe of the blower, and the measuring end is embedded in the air outlet pipe of the blower; The program of the control panel determines the model of the breathing mask currently in use by comparing the static pressure difference of the resistance after filtration with the resistance parameter range corresponding to different models of masks pre-stored in the program; the optimal performance speed value of the blower corresponding to various models of breathing masks is pre-stored in the program, and the optimal performance speed value of the blower speed is adjusted according to the identified breathing mask model.

2. A powered air supply respirator equipped with an air pressure sensor according to claim 1, characterized in that: A trigger device is also provided on the front panel of the host, and the trigger device is electrically connected to the control board.

3. A powered air supply respirator equipped with an air pressure sensor according to claim 1, characterized in that: A debugging interface is also provided, which is located on the surface of the rear shell and is electrically connected to the control board.

4. A powered air supply respirator equipped with an air pressure sensor according to claim 1, characterized in that: A rechargeable battery is also provided, fixed to the rear side of the front panel of the host and electrically connected to the control board.

5. The powered air supply respirator equipped with an air pressure sensor according to claim 1, characterized in that: A display screen is also provided, which is located on the side of the host front panel and is electrically connected to the control board.

6. A powered air supply respirator equipped with an air pressure sensor according to claim 1, characterized in that: The control board includes an integrated main control chip, a buzzer and a vibration motor; the integrated main control chip integrates a wireless network module and a Bluetooth module; the buzzer and the vibration motor are both electrically connected to the integrated main control chip.

7. A method for monitoring a powered air respirator equipped with an air pressure sensor according to claims 1-6, characterized in that: The following steps are involved: Step 1: Collect the air pressure values ​​of the powered air respirator when it is stationary and when it is working; Step 2: Difference the different air pressure values ​​to obtain the static pressure difference; Step 3: Determine the working status of the powered air respirator based on the static pressure difference, adjust the blower speed, and select a matching breathing mask.

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