Control method for long-duration chemical oxygen breathing apparatus

Abstract

The application discloses a control method of a long-time chemical oxygen respirator, and belongs to the technical field of fire-fighting products. The method solves the problem that the product state of the chemical oxygen respirator and the use state of the wearer cannot be known or the problem that the dynamic adjustment cannot be performed according to the breathing state of the wearer in the prior art. The method comprises the following steps: the respirator is powered on, a hand-held terminal displays a start-up interface and an oxygen generator tank type, and the electric quantity is detected; the respirator enters a low-power standby state, the display screen and the alarm lamp on the hand-held terminal are turned off, and the main controller enters a sleep state; the respirator enters a test state, the battery electric quantity is detected, whether the oxygen generator tank is in place is detected, the air guide fan is detected, whether the self-starting switch has a fault is detected, if the fault exists, the fault type is displayed, if there is no fault, the oxygen generator tank, the air guide fan detection, the residual capacity alarm detection, the motion state alarm detection, the manual alarm detection and the refrigeration detection are started. The application can be used for the control of the respirator.

Description

Technical Field

[0001] This invention belongs to the field of fire protection product technology, specifically relating to a control method for a long-endurance chemical oxygen respirator. Background Technology

[0002] Existing respiratory protective equipment is mainly composed of filtering, compressed gas, and chemical oxygen types. It lacks an electrical system and cannot provide the wearer with more information about the product or control operations, and is only intended for simple use.

[0003] Some products, such as air respirators, use electrical systems to detect the pressure of compressed gas in the cylinder to determine the remaining usage time, and use valves and other devices to supply air. They can usually only supply air at a specified volume, and the products cannot dynamically adjust to the wearer's breathing state.

[0004] The control system has few control parameters, displays limited information, and is simply designed. Alarm information is provided only through alarm lights, lacking intuitiveness. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a control method for a long-endurance chemical oxygen respirator, which solves the problem in the prior art that it is impossible to know the product status of the chemical oxygen respirator and the wearer's usage status or to dynamically adjust it according to the wearer's breathing status.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] This invention provides a control method for a long-endurance chemical oxygen respirator, comprising the following steps:

[0008] Step 1: Power on the respirator. The handheld terminal displays the power-on interface and oxygen tank type, and performs a power check.

[0009] Step 2: After powering on, the respirator enters a low-power standby state, turns off the display screen and alarm light on the handheld terminal, and the main controller of the respirator enters a sleep state.

[0010] Step 3: When the respirator is needed, the respirator enters the test state to check the battery power, check whether the oxygen tank is in place, check the air delivery fan, and check whether the automatic start switch is faulty. If there is a fault, the fault type will be displayed on the display screen. If there is no fault, proceed to step 4.

[0011] Step 4: Start the oxygen tank, check the air delivery fan, check the remaining capacity alarm, check the operation status alarm, check the manual alarm, and check the cooling.

[0012] Furthermore, in step 1, the battery detection includes the following steps:

[0013] The system determines whether the battery level is below a threshold. If the battery level is below the threshold, the handheld terminal sends a low battery alarm signal to the alarm controller. The alarm controller then issues an alarm based on the low battery alarm signal, and the battery icon on the handheld terminal's display shows an empty battery level. If the battery level is not below the threshold, the battery icon on the handheld terminal's display shows a full battery level.

[0014] Furthermore, in step 4, the remaining capacity alarm detection includes the following steps:

[0015] The remaining capacity of the ventilator is acquired in real time. When the remaining capacity drops to the appropriate capacity threshold, an appropriate capacity alarm is triggered; when the remaining capacity drops from the appropriate capacity threshold to the insufficient capacity threshold, an insufficient capacity alarm is triggered; when the remaining capacity drops from the insufficient capacity threshold to the withdrawal threshold, a withdrawal alarm is triggered.

[0016] Furthermore, motion state alarm detection includes the following steps:

[0017] The system monitors the ventilator's motion status in real time. When the ventilator's rest time reaches the motion cessation threshold, a motion status cessation alarm is triggered. When the rest time increases from the motion cessation threshold to the motion danger threshold, a motion status danger alarm is triggered.

[0018] Furthermore, manual alarm detection includes the following steps:

[0019] Obtain the manual alarm signal sent by the manual alarm button, and trigger a manual alarm based on the manual alarm signal.

[0020] Furthermore, the refrigeration test includes the following steps:

[0021] The system receives inhalation temperature data collected by the inhalation temperature sensor and determines whether the inhalation temperature data exceeds the activation threshold. If it exceeds the activation threshold, the thermoelectric cooler is activated, and the inhalation air exchanges heat with the cold surface of the thermoelectric cooler. The cold surface of the thermoelectric cooler transfers heat to the hot surface of the thermoelectric cooler. If the activation threshold is not exceeded, the thermoelectric cooler remains in the off state.

[0022] Furthermore, the air duct fan test includes the following steps:

[0023] The system receives gas pressure data from the air outlet of the air intake bag collected by the pressure sensor and determines whether the gas pressure data exceeds the pressure threshold. If the gas pressure data exceeds the pressure threshold, the fan speed controller increases the fan drive voltage, and the air guide fan speed increases. If the gas pressure data does not exceed the pressure threshold, the fan speed controller keeps the fan drive voltage unchanged, and the air guide fan speed remains unchanged.

[0024] Furthermore, step 3, checking whether the oxygen generator is in place, includes the following steps:

[0025] Step 31: Provide an oxygen candle detection circuit. The oxygen candle detection circuit includes a transistor. One end of the oxygen candle of the respirator is grounded, and the other end is connected to the emitter of the transistor. The base of the transistor is connected to the output port of the main controller of the respirator. The collector of the transistor, the power supply of the transistor and the acquisition port of the main controller are interconnected.

[0026] Step 32: When identifying the oxygen candle, the output port of the main controller of the respirator is continuously applied with voltage, and the transistor is turned on. If the voltage collected and calculated by the main controller is equal to or approximately equal to the oxygen candle voltage, it means that the oxygen candle has not been used and the oxygen candle is in place. If the voltage collected by the main controller is equal to or approximately equal to the power supply voltage, it means that the oxygen candle has been used and / or the oxygen candle is not in place.

[0027] Furthermore, the respirator includes a mask unit, which includes a mask and an indicator light strip disposed on the surface of the mask.

[0028] Furthermore, the indicator light strip includes 10 LEDs, which are connected in series to the main controller;

[0029] Remaining capacity is 100%, all LEDs are on, and the color is green; remaining capacity is 90%, only 9 LEDs are on, and the color is green; remaining capacity is 80%, only 8 LEDs are on, and the color is green; remaining capacity is 70%, only 7 LEDs are on, and the color is green; remaining capacity is 60%, only 6 LEDs are on, and the color is green; remaining capacity is 50%, only 5 LEDs are on, and the color is yellow; remaining capacity is 40%, only 4 LEDs are on, and the color is yellow; remaining capacity is 30%, only 3 LEDs are on, and the color is yellow; remaining capacity is 20%, only 2 LEDs are on, and the color is red; remaining capacity is 10%, only 1 LED is on, and the color is red.

[0030] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0031] A) The control method for the long-endurance chemical oxygen respirator provided by this invention performs battery power detection and fault detection of various components before the respirator is used. During the use of the respirator, it performs air delivery fan detection, remaining capacity detection, motion status detection, manual alarm detection, and cooling detection. On the one hand, in practical applications, remaining capacity and motion status are crucial to the safety of the wearer. Remaining capacity detection is used to alarm the remaining capacity of the respirator, and motion status detection is used to detect whether the person is in a stationary state after a fall. Through the setting of the above two alarms, timely alarms can be set when danger is posed to the wearer, and the wearer can call for help after a fall, thus effectively ensuring the personal safety of the wearer.

[0032] B) The control method of the long-endurance chemical oxygen respirator provided by the present invention realizes the automatic opening or closing of the semiconductor cooling chip through cooling detection, actively cooling the inhaled air and providing a more comfortable breathing experience; through the detection of the air guide fan, the wind speed of the air guide fan can be intelligently adjusted according to the breathing situation under different exercise states. During strenuous exercise, the exhalation volume increases, and the wind speed of the air guide fan increases, thereby effectively reducing the discomfort of shortness of breath. The active cooling respirator can be adjusted to produce a comfortable breathing state for different breathing needs or different operators.

[0033] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Attached image description:

[0036] Figure 1 A flowchart of the control method for a long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0037] Figure 2 This is a schematic diagram of the semiconductor cooling unit in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0038] Figure 3 This is a front view of the semiconductor cooling unit in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0039] Figure 4 This is a schematic diagram of the mask unit in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0040] Figure 5 This is a schematic diagram of the mask unit from another direction in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0041] Figure 6 This is a schematic diagram of the breathing tube three-way valve in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0042] Figure 7 The side view of the breathing tube three-way valve in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0043] Figure 8 This is a schematic diagram of the oxygen candle detection circuit in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0044] Figure 9 This is a schematic diagram of the oxygen generation tank in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0045] Figure 10 This is a schematic diagram of the internal structure of the oxygen generation tank in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0046] Figure 11 This is a top view of the oxygen generation tank in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0047] Figure 12 This is a schematic diagram of the structure of the agent filter, the guide tube, and the agent separator in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention.

[0048] Figure 13 This is a schematic diagram of the structure of the pharmaceutical filter screen in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0049] Figure 14 This is a schematic diagram of the airbag structure in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0050] Figure 15 This is a cross-sectional view of the airbag in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention;

[0051] Figure 16 This is a schematic diagram of the exhaust component in the control method of the long-endurance chemical oxygen respirator provided in Embodiment 1 of the present invention.

[0052] Figure label:

[0053] 1-Upper end cap; 2-Mask; 3-Outer cylinder; 4-Indicator light strip; 5-Breathing tube tee; 6-Lower end cap; 601-Guide tube; 602-Powder filter; 7-Medicine filter; 8-Exhalation bag; 801-Exhalation bag inlet / outlet; 9-Inhalation bag; 901-Inhalation bag outlet; 902-Inhalation bag inlet; 10-Exhaust component; 1001-Upper cover; 1002-Baffle; 1003-Connecting base; 1004-Spring; 1005-Pull rod; 1006-Pull rope; 1007-Exhaust port; 1008-Elastic ring; 1009-Blade ring; 11-Semiconductor cooling chip; 12-Tee contact; 13-Light strip contact; 14-Self-starting switch; 15-Cooling fan; 16-Heat-absorbing fins; 17-Cooling fins. Detailed Implementation

[0054] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0055] Example 1

[0056] This embodiment provides a control method for a long-endurance chemical oxygen respirator. (See also...) Figure 1 It includes the following steps:

[0057] Step 1: Power on the respirator. The handheld terminal displays the power-on interface and the type of oxygen tank. It performs a power detection to determine if the battery level is below the power threshold (e.g., 12V). If the power level is below the power threshold, the handheld terminal sends a low power alarm signal to the alarm controller. The alarm controller will then sound an alarm based on the low power alarm signal. The battery icon on the handheld terminal's display will show an empty battery level. If the power level is above the power threshold, the battery icon on the handheld terminal's display will show a full battery level.

[0058] Step 2: After power-on, the control system enters a low-power standby state, turns off the display screen and alarm light on the handheld terminal, and realizes the function of low power saving and long-term standby. The main controller cuts off the power supply circuit of other components and enters a sleep state.

[0059] Step 3: When the respirator is needed, the test can be triggered by pressing the test button or by using the respirator's start function. After receiving the test signal, the control system wakes up the main controller, all circuits are activated, and the system enters the test state. It checks the battery level, the presence of the oxygen tank, the air delivery fan, and the self-starting switch for faults. If a fault is found, the fault type will be displayed on the screen, and a red light will flash and a buzzer will sound an alarm. If no fault is found, proceed to Step 4.

[0060] Step 4: Start the oxygen tank, check the air delivery fan, check the remaining capacity alarm, check the operation status alarm, check the manual alarm, and check the cooling.

[0061] Compared with existing technologies, the control method for the long-endurance chemical oxygen respirator provided in this embodiment performs battery power detection and fault detection of various components before the respirator is used. During the use of the respirator, it performs airflow fan detection, remaining capacity detection, motion status detection, manual alarm detection, and cooling detection. On the one hand, in practical applications, remaining capacity and motion status are crucial to the wearer's safety. Remaining capacity detection is used to alarm the remaining capacity of the respirator, and motion status detection is used to detect whether the person is in a stationary state after a fall. Through the setting of the above two alarms, timely alarms can be triggered when danger is posed to the wearer, and the wearer can call for help after a fall, thus effectively ensuring the wearer's personal safety.

[0062] On the other hand, the automatic opening or closing of the semiconductor cooling chip 11 is achieved through cooling detection, which actively cools the inhaled air and provides a more comfortable breathing experience. Through the detection of the air guide fan, the wind speed of the air guide fan is intelligently adjusted. The wind speed of the air guide fan can be adjusted according to the breathing situation under different exercise states. During strenuous exercise, the exhalation volume increases and the wind speed of the air guide fan increases, which can effectively reduce the discomfort of shortness of breath. The active cooling respirator can be adjusted to produce a comfortable breathing state for different breathing needs or different workers.

[0063] Specifically, step 4 above, the remaining capacity alarm detection includes the following steps:

[0064] The remaining capacity of the respirator is monitored in real time. When the remaining capacity drops to the appropriate capacity threshold (e.g., 50%), an appropriate capacity alarm is triggered. When the remaining capacity drops from the appropriate capacity threshold to the insufficient capacity threshold (e.g., 20%), an insufficient capacity alarm is triggered. When the remaining capacity drops from the insufficient capacity threshold to the withdrawal threshold (e.g., 5%), an withdrawal alarm is triggered. At this point, the wearer must withdraw from the rescue site as soon as possible.

[0065] Motion status alarm detection includes the following steps:

[0066] The system acquires the movement status of the ventilator in real time. When the ventilator's still time reaches the movement stop threshold (e.g., 5s), a movement stop alarm is triggered. When the still time increases from the movement stop threshold to the movement danger threshold (e.g., 10s), a movement danger alarm is triggered.

[0067] Manual alarm detection includes the following steps:

[0068] Obtain the manual alarm signal sent by the manual alarm button, and trigger a manual alarm based on the manual alarm signal.

[0069] In order to further improve the safety of the respirator, the alarm levels of the remaining capacity alarm, motion status alarm and manual alarm are gradually increased. The remaining capacity alarm can be preempted by the manual alarm, motion status alarm and other functions. After the manual alarm and motion status alarm are cleared, the remaining capacity alarm function will be automatically restored.

[0070] In other words, when both motion status alarm and remaining capacity alarm are required, the motion status alarm will be triggered first, and the remaining capacity alarm will be triggered only after the motion status alarm is cleared.

[0071] Similarly, when both manual alarm and remaining capacity alarm need to be triggered simultaneously, the manual alarm should be triggered first, and the remaining capacity alarm should be triggered only after the manual alarm is deactivated.

[0072] When both manual alarm and motion status alarm are required simultaneously, the manual alarm should be activated first, and the motion status alarm should be activated only after the manual alarm is deactivated.

[0073] When manual alarm, motion status alarm and remaining capacity alarm need to be activated simultaneously, the manual alarm should be activated first. After the manual alarm is deactivated, the motion status alarm should be activated. Finally, the remaining capacity alarm should be activated after the motion status alarm is deactivated.

[0074] Specifically, refrigeration testing includes the following steps:

[0075] The system receives inhalation temperature data collected by the inhalation temperature sensor and determines whether the inhalation temperature data exceeds the opening threshold (e.g., 40-45°C). If it exceeds the opening threshold, the thermoelectric cooler 11 is turned on, and the inhalation air exchanges heat with the cold surface of the thermoelectric cooler 11. The cold surface of the thermoelectric cooler 11 transfers heat to the hot surface of the thermoelectric cooler 11. If the opening threshold is not exceeded, the thermoelectric cooler 11 remains in the off state.

[0076] In order to determine when the thermoelectric cooler 11 needs to be turned off, after turning on the thermoelectric cooler 11 to cool the intake gas, the above control method also includes the following steps:

[0077] The system determines whether the intake temperature is below a shutdown threshold (e.g., 35°C). If it is below the threshold, the thermoelectric cooler 11 is turned off; if it is above the threshold, the thermoelectric cooler 11 remains on. This allows for real-time adjustment of the thermoelectric cooler 11's on / off state by determining whether the temperature is below the shutdown threshold, thus saving power.

[0078] The air duct fan test includes the following steps:

[0079] The system receives gas pressure data from the air outlet of the air intake bag collected by the pressure sensor and determines whether the gas pressure data exceeds the pressure threshold. If the gas pressure data exceeds the pressure threshold, the fan speed controller increases the fan drive voltage, and the air guide fan speed increases. If the gas pressure data does not exceed the pressure threshold, the fan speed controller keeps the fan drive voltage unchanged, and the air guide fan speed remains unchanged.

[0080] Step 3 above, checking whether the oxygen generator is in place includes the following steps:

[0081] Step 31: Provide an oxygen candle detection circuit, see [link / reference] Figure 8 The oxygen candle detection circuit includes a transistor Q1. One end of the oxygen candle of the respirator is grounded, and the other end is connected to the emitter of the transistor. The base of the transistor is connected to the output port IO of the main controller of the respirator. The collector of the transistor, the power supply, and the acquisition port ADC of the main controller are interconnected.

[0082] Step 32: When identifying the oxygen candle, the output port (IO) of the main controller of the respirator is continuously supplied with voltage (i.e., high level), and the transistor is turned on. If the voltage calculated by the acquisition port (ADC) of the main controller is equal to or approximately equal to the oxygen candle voltage, it means that the oxygen candle has not been used and the oxygen candle is in place. If the voltage acquired by the acquisition port of the main controller is equal to or approximately equal to the power supply voltage, it means that the oxygen candle has been used and / or the oxygen candle is not in place.

[0083] It should be noted that the oxygen candle is a resistive device. If the oxygen candle has been used or is not in place, it will be an open circuit in the oxygen candle detection circuit. If the oxygen candle has not been used and is in place, it will be a closed circuit. Thus, by directly utilizing the existing oxygen candle on the respirator to detect whether the oxygen generator is in place, and by using a dedicated oxygen candle detection circuit, a high level can be continuously applied to the transistor before the respirator is used, causing it to conduct. The voltage collected by the main controller's acquisition port is the oxygen candle voltage, indicating that the oxygen candle has not been used and is in place. Conversely, if the voltage collected by the main controller's acquisition port is the power supply voltage, it indicates that the oxygen candle has been used and / or is not in place. Therefore, the oxygen candle detection circuit can identify whether the oxygen candle has been used or is in place. Since the above oxygen candle detection circuit mainly uses... Using the existing respirator structure (e.g., oxygen candle, main controller output port, and main controller acquisition port), only an additional transistor is needed, eliminating the need for additional sensors. This effectively simplifies the wiring and overall structure of the identifiable oxygen generator, reducing structural dependence. When oxygen candle identification is required, only a continuous high-level voltage needs to be applied to the transistor to turn it on, making operation simple and ensuring high product reliability. Furthermore, since the oxygen candle is part of the oxygen generator, this structure not only detects the presence of the oxygen generator but also checks whether the oxygen candle, as an initial oxygen supply device, is functioning correctly, improving the reliability and safety of the oxygen generator.

[0084] Furthermore, the aforementioned oxygen candle detection circuit also includes a comparator. The comparator receives the voltage from the main controller's acquisition port and compares it with the design voltage of different oxygen candle models. If the voltage at the main controller's acquisition port is equal to the design voltage of one of the oxygen candle models, it indicates that the detected oxygen candle is that model. Since different oxygen production tank models correspond to different operating conditions, and there is a one-to-one correspondence between oxygen production tank models and oxygen candle models, the corresponding oxygen production tank model can be obtained based on the oxygen candle model. Using the above method, the models of oxygen candles and oxygen production tanks can be determined simply, quickly, and accurately, thus facilitating the selection of the correct oxygen production tank by the user.

[0085] For example, when the voltage at the sampling port is 0.3 to 0.4V, the oxygen generator type is a 2-hour oxygen generator; when the voltage at the sampling port is 0.5 to 0.6V, the oxygen generator type is a 4-hour oxygen generator.

[0086] In the event that the oxygen candle has been used and / or is not in place, in order to limit the current of the oxygen candle detection circuit and prevent excessive current, the oxygen candle detection circuit also includes a resistor R1. One end of the resistor R1 is connected to the power supply +VCC, and the other end is connected to the collector. The acquisition port (ADC) of the main controller is led out from the collector.

[0087] In order to limit the current of the oxygen candle detection circuit and prevent excessive current when the oxygen candle has not been used and is in place, the oxygen candle detection circuit also includes a resistor R2. One end of the resistor R2 is connected to the output port (IO) of the main controller, and the other end is connected to the base.

[0088] In order to pull down the voltage when the transistor is not conducting, the above oxygen candle detection circuit also includes a resistor R3. The resistor R3 is a pull-down resistor, which is connected between the base and the emitter. One end of the resistor R3 is led out from the base of the transistor, and the other end is led out from the emitter of the transistor.

[0089] Specifically, given the resistance of R1, the voltage at the acquisition port can be calculated using the voltage ratio relationship. The formula for calculating the voltage at the acquisition port is as follows:

[0090] V ADC =(((Vcc-Vce) / (R1+Roxy))×Roxy)+Vce——Equation 1

[0091] Among them, V ADC Vc is the voltage at the acquisition port, Vcc is the power supply voltage, Vc; Vce is the voltage across the transistor, Vc; R1 is the resistance of resistor R1, Ω; Roxy is the oxide resistor, Ω.

[0092] For example, if Vcc is 3.3V, Vce is 0.3V, R1 is 56Ω, and Roxy is 2Ω, the calculated voltage at the acquisition port is 0.4V, which is close to the oxygen candle voltage. This indicates that the oxygen candle has not been used and is in place. If the calculated voltage at the acquisition port is 3.3V, this indicates that the oxygen candle has been used and / or is not in place.

[0093] For example, the above control method is applicable to a respirator with the following structure.

[0094] The aforementioned respirator includes a semiconductor cooling unit, see [link / reference]. Figures 2 to 3 The semiconductor cooling unit includes a connecting pipe and a semiconductor cooling chip 11 disposed on the connecting pipe. The cold side of the semiconductor cooling chip 11 is located inside the connecting pipe, and the hot side of the semiconductor cooling chip 11 is located outside the connecting pipe. In this way, through the arrangement of the semiconductor cooling chip 11 and the principle of two-stage heat exchange by energizing the semiconductor cooling chip 11, one side of the semiconductor cooling chip 11 absorbs heat (i.e., the cold side), and the other side of the semiconductor cooling chip 11 releases heat (i.e., the hot side). The cold side is close to the connecting pipe, thereby carrying away the heat in the connecting pipe and further reducing the breathing temperature.

[0095] In order to quickly transfer the temperature of the hot surface of the thermoelectric cooler 11 to the external environment, the thermoelectric cooler unit also includes a cooling fan 15. The cooling fan 15 is located outside the connecting pipe and corresponds to the hot surface of the thermoelectric cooler 11. The cooling fan 15 transfers the temperature of the hot surface to the external environment as quickly as possible, thereby effectively protecting the thermoelectric cooler 11 and preventing it from being burned out.

[0096] In order to automatically control the activation of the cooling fan 15, the aforementioned semiconductor cooling unit also includes a hot surface temperature sensor disposed on the hot surface of the semiconductor cooling chip 11. The aforementioned control system also includes a fan controller. The hot surface temperature sensor and the cooling fan 15 are respectively connected to the fan controller. The fan controller receives the hot surface temperature data collected by the hot surface temperature sensor and calculates the hot surface temperature rise rate. It determines whether the hot surface temperature rise rate exceeds the rate threshold. If it exceeds the rate threshold, the fan controller increases the duty cycle, increases the voltage of the cooling fan 15, and increases the air speed of the cooling fan 15 to suppress the hot surface temperature of the semiconductor cooling chip 11 from rising too quickly, until the hot surface temperature rise rate is zero, that is, the hot surface temperature of the semiconductor cooling chip 11 remains unchanged and reaches a steady state of equilibrium. If it does not exceed the rate threshold, the fan controller keeps the duty cycle unchanged or decreases the duty cycle, keeps the voltage of the cooling fan 15 unchanged or decreases, and keeps the air speed of the cooling fan 15 unchanged or decreases the air speed of the cooling fan 15.

[0097] In order to improve the heat transfer between the cold surface of the thermoelectric cooler 11 and the intake air, the thermoelectric cooler unit further includes heat-absorbing fins 16 disposed on the cold surface of the thermoelectric cooler 11 and / or heat-dissipating fins 17 disposed on the hot surface of the thermoelectric cooler 11. In this way, the heat-absorbing fins 16 can quickly transfer the heat in the intake air to the thermoelectric cooler 11, and the heat-dissipating fins 17 can quickly transfer the heat on the hot surface of the thermoelectric cooler 11 to the external environment, which can effectively increase the contact area and improve the heat exchange efficiency.

[0098] For example, the heat-absorbing fins 16 and heat-dissipating fins 17 are made of metal materials with high thermal conductivity, such as aluminum or copper.

[0099] The respirator also includes a mask unit, see [link / reference]. Figures 4 to 7It includes a face mask 2 and an indicator light strip 4. The indicator light strip 4 is located on the surface of the face mask 2 and is within the wearer's field of vision. The indicator light strip 4 includes multiple LEDs, which are connected in series with a data cable and then connected to the main controller. The LEDs are controlled by digital signals, which can display more LEDs while reducing the number of LED data control lines. The indicator light strip 4 adopts RGB multi-color format, and the data range of each LED is 0 to 255, that is, each LED can display various colors. Different information is displayed by the number and color of LEDs, and different light strip display effects are achieved according to different alarm information, such as flashing time interval setting, LED number setting, and LED color setting.

[0100] The remaining capacity is primarily displayed using indicator light strip 4, with the specific display method as follows:

[0101] For example, with 10 LED beads, the remaining capacity of a respirator based on the principle of chemical oxygen generation can be displayed relatively accurately.

[0102] Remaining capacity is 100%, all LEDs are on, and the color is green; remaining capacity is 90%, only 9 LEDs are on, and the color is green; remaining capacity is 80%, only 8 LEDs are on, and the color is green; remaining capacity is 70%, only 7 LEDs are on, and the color is green; remaining capacity is 60%, only 6 LEDs are on, and the color is green; remaining capacity is 50%, only 5 LEDs are on, and the color is yellow; remaining capacity is 40%, only 4 LEDs are on, and the color is yellow; remaining capacity is 30%, only 3 LEDs are on, and the color is yellow; remaining capacity is 20%, only 2 LEDs are on, and the color is red; remaining capacity is 10%, only 1 LED is on, and the color is red.

[0103] For example, the status of the indicator light strip 4, the retreat sign, and the buzzer corresponding to the above alarm are as follows:

[0104] When the capacity is adequate, the alarm light on the handheld terminal will flash green and the buzzer will sound. When the capacity is insufficient, the alarm light on the handheld terminal will flash red and green alternately, the buzzer will sound, and an evacuation sign will be displayed. When the evacuation alarm is triggered, the alarm light on the handheld terminal will flash red and the buzzer will sound.

[0105] It should be noted that in the alarms for adequate capacity, insufficient capacity, and evacuation, the beeping interval of the buzzer gradually decreases.

[0106] When the alarm is triggered while the motion is stopped, the alarm light on the handheld terminal will flash red and green alternately, and the buzzer will sound. All the LEDs in indicator light strip 4 will flash red. When the alarm is triggered while the motion is in danger, the alarm light on the handheld terminal will flash red, and the buzzer will sound. All the LEDs in indicator light strip 4 will flash red.

[0107] When manually alarming, the alarm light on the handheld terminal will be constantly red and the buzzer will sound, while all the LEDs in indicator light strip 4 will flash red.

[0108] The connection between the indicator light strip 4 and the main controller of the respirator can be wired or wireless.

[0109] For example, in the wired configuration, the mask unit further includes a light strip contact 13 connected to a light strip controller. The respirator also includes a breathing tube tee 5, a tee contact 12, an automatic start switch 14, and a main controller. The breathing tube tee 5 is inserted into the mask 2. The tee contact 12 and the automatic start switch 14 are both connected to the main controller of the respirator. The tee contact 12 and the automatic start switch 14 are both located on the breathing tube tee 5. The tee contact 12 is located on the surface of the breathing tube tee 5 facing the mask 2. The light strip contact 13 is located on the surface of the mask 2 facing the breathing tube tee 5. The tee contact 12 and the light strip contact 13 are detachably connected. Before the respirator is started, the breathing tube tee 5 is inserted into the shoulder strap seat of the respirator. At this time, the indicator light strip 4 is not turned on, and the self-starting switch 14 is pressed by the protrusion inside the shoulder strap seat, so the respirator is in the non-starting state. When the wearer needs to use it, the breathing tube tee 5 is pulled out from the shoulder strap seat, the self-starting switch 14 pops open and sends a start signal to the main controller, and the main controller controls the respirator to start running automatically. When the breathing tube tee 5 is inserted into the mask 2, the wearer can use it normally. At this time, the tee contact 12 on the breathing tube tee 5 contacts the light strip contact 13, so that the light strip controller is connected to the main controller. The main controller sends the corresponding remaining capacity mode, remaining capacity appropriate mode, or remaining capacity insufficient mode to the light strip controller according to the remaining capacity. The light strip controller controls the indicator light strip 4 to be in the corresponding mode to display the remaining capacity of the respirator.

[0110] For example, the breathing tube tee 5 has a cable outlet on the side facing the mask 2. One end of the cable is connected to the tee contact 12 and the self-starting switch 14. The other end of the cable passes through the cable outlet and the breathing tube tee 5 and is connected to the main controller through the electronic distributor, thereby realizing signal transmission between the main controller and the light strip controller.

[0111] For wireless applications, the respirator also includes a breathing tube three-way valve 5 and a handheld terminal. The light strip controller (e.g., control chip, wireless chip, light strip battery, etc.) is located inside the breathing tube three-way valve 5. The handheld terminal is equipped with a terminal wireless module, and the light strip controller is equipped with a light strip wireless module. The light strip controller is wirelessly connected to the main controller in the handheld terminal in sequence through the light strip wireless module and the terminal wireless module.

[0112] For example, the respirator also includes a shoulder strap seat, which is provided with a shoulder strap pairing transmission interface and an automatic start switch 14. The automatic pneumatic switch and the shoulder strap pairing transmission interface are connected to the main controller in the electronic distributor and the handheld terminal in sequence via cables. The light strip controller is provided with a light strip pairing transmission interface. The shoulder strap pairing transmission interface and the light strip pairing transmission interface are detachably connected to realize the wired connection between the light strip controller and the main controller.

[0113] Before the respirator is activated, the breathing tube tee 5 is inserted into the shoulder strap seat. The LED strip pairing transmission interface inside the breathing tube tee 5 is connected to the shoulder strap pairing transmission interface. The shoulder strap pairing transmission interface is connected to the main controller in the handheld terminal through the electronic distributor. At this time, the LED strip controller and the main controller in the handheld terminal are essentially wired connected, and address pre-pairing is performed between the wireless modules of the LED strip controller and the handheld terminal. The MAC addresses of both parties are exchanged through the serial port. When the wearer uses the respirator, the breathing tube tee 5 is removed and inserted into the mask 2. The LED strip controller inside the breathing tube tee 5 is in wireless data transmission mode with the handheld terminal. The LED strip wireless module inside the LED strip controller receives the data sent by the terminal wireless module of the handheld terminal. The LED strip controller controls the LED strip 4 to be in the corresponding mode and displays the remaining capacity of the respirator.

[0114] For example, the above-mentioned respirator also includes an oxygen generator and an air bag, wherein the oxygen generator includes an upper end cap 1, an outer cylinder 3, a drug filter 7, and a lower end cap 6, see [link to relevant documentation]. Figures 9 to 13 The upper end cover 1 is located at the upper opening of the outer cylinder 3, and an air inlet for exhaled air to enter. The lower end cover 6 is located at the lower opening of the outer cylinder 3, and an air outlet for generated oxygen to flow out. The outer cylinder 3 is fitted onto the outer wall of the drug filter 7, and there is a gap between the outer cylinder 3 and the drug filter 7, forming a sandwich nested structure. The drug filter 7 contains the drug. The heat dissipation unit includes a heat dissipation cavity 15. The airbag includes a nested exhalation airbag 8 and an inhalation airbag 9, with the exhalation airbag 8 located in the inner layer and the inhalation airbag 9 located in the outer layer. The air inlet and outlet 801 of the exhalation airbag is connected to the air inlet on the upper end cover 1, and the air outlet on the lower end cover 6 is connected to the air inlet of the inhalation airbag.

[0115] It should be noted that in practical applications, the diameter of the oxygen generator is 120mm to 150mm, the height of the oxygen generator is 180mm to 220mm, and the weight of the agent in each oxygen generator is 1.1 to 1.8kg. Accordingly, the respirator is usually equipped with two oxygen generators, that is, the total weight of the agent is 2.2 to 3.6kg. In this way, the oxygen supply time of the respirator can reach more than 4 hours.

[0116] On the one hand, regarding the structure of the oxygen generator, the outer cylinder 3 and the medicine filter 7 form a sandwiched nested structure. The exhaled air entering the oxygen generator is automatically divided into two parts. One part of the exhaled air directly enters the medicine filter 7 and reacts with the medicine in the medicine filter 7 to generate oxygen. The other part of the exhaled air flows into the gap and enters the medicine filter 7 through the mesh to react with the medicine in the medicine filter 7 to generate oxygen. Among them, the part of the exhaled air that flows into the gap will flow in the gap and flow into the medicine filter 7 through the mesh. The flow path of this part of the exhaled air through the medicine is shorter, and the flow resistance in the gap is much lower than the flow resistance in the medicine filter 7, thereby achieving the effect of reducing the resistance of the oxygen generator. At the same time, this part of the exhaled air flowing in the gap can be evenly supplied into the medicine filter 7 from the circumference, increasing the interaction area between the exhaled air and the medicine, thereby effectively improving the reaction efficiency between the exhaled air and the medicine.

[0117] On the other hand, a person's exhaled air enters the exhalation bag 8 through the exhalation bag inlet / outlet 801. The exhaled air is discharged from the exhalation bag inlet / outlet 801 and sent to the oxygen generator for reaction. Since the oxygen production reaction in the oxygen generator produces a lot of heat, the oxygen produced by the reaction and some unreacted exhaled air are used as inhaled air after strong heat dissipation and enter the inhalation bag 9 through the inhalation bag inlet 902. The inhaled air in the inhalation bag 9 will enter the human body as the inhalation valve is opened under the action of the person's inhalation, thereby providing gas (i.e. oxygen) that can be breathed by the human body. With the above-described airbag structure, the exhalation bag 8 can buffer part of the exhaled air, reducing the CO2 concentration in the inhaled air, thereby improving the comfort of the operator and alleviating the feeling of stuffiness. Simultaneously, during the operation of the airbag, if the pressure inside the inhalation bag 9 is too high, the exhalation bag 8 will release some of the exhaled air, thus reducing the amount of exhaled air delivered to the oxygen generator. This allows the exhaled air to react fully within the oxygen generator, further reducing the CO2 concentration in the inhaled air exiting the oxygen generator. Furthermore, the nested structure of the airbag ensures that the temperature of the exhaled air is 37°C, while the temperature of the inhaled air generated within the oxygen generator is greater than 37°C. Heat exchange between the exhaled and inhaled air occurs through the side wall of the exhalation bag 8, effectively reducing the inhaled air temperature and improving operator comfort.

[0118] For example, in the oxygen generator, the upper end cover 1 and the lower end cover 6 are both fixedly connected to the outer cylinder 3 by welding. The lower end cover 6 has a groove for installing the chemical filter screen 7. The chemical filter screen 7 is inserted into the groove and fixedly connected to the lower end cover 6.

[0119] To prevent the medication from entering the gaps and blocking the flow of exhalation, the diameter of the medication needs to be larger than the pore size of the medication filter 7. For example, the ratio of the diameter of the medication to the pore size of the medication filter 7 is 2.5 to 3: 1 to 2. For instance, the diameter of the medication is 5 to 6 mm, and the pore size of the medication filter 7 is about 2 to 4 mm.

[0120] In order to guide the generated oxygen and further reduce the flow resistance of the oxygen generator, the oxygen generator also includes a guide tube 601 disposed in the medicine filter 7. The bottom of the guide tube 601 is fixedly connected to the lower end cover 6 (e.g., by welding). The side wall and top of the guide tube 601 are provided with guide holes as air inlets of the guide tube 601. The bottom opening of the guide tube 601 is connected to the air outlet on the lower end cover 6 as the air outlet of the guide tube 601. In this way, compared with the oxygen only being able to flow out from the air outlet on the lower end cover 6, the flow path of exhaled air through the medicine can be further shortened by the setting of the guide tube 601, and the generated oxygen can flow into the guide tube 601 from the side wall and top of the guide tube 601 and be further guided to the air outlet on the lower end cover 6, which can further reduce the flow resistance of the oxygen generator. It should be noted that, through the arrangement of the gaps and the guide tube 601, the portion of exhaled air flowing into the drug filter 7 from the interlayer can basically flow out from the air inlet of the relatively adjacent guide tube 601, which can effectively optimize the exhaled airflow path. At the same time, since both the circumference of the drug filter 7 and the circumference of the guide tube 601 are ventilable, the exhaled air and the drug can interact in all directions, thereby further improving the adequacy of their reaction.

[0121] Similarly, in order to prevent the reagent from entering the guide tube 601 and blocking the flow of oxygen, the diameter of the reagent needs to be larger than the orifice diameter of the guide tube 601. For example, the ratio of the diameter of the reagent to the orifice diameter is 2.5 to 3: 1 to 2. For example, the diameter of the reagent is 5 to 6 mm, and the orifice diameter is about 2 to 4 mm.

[0122] Since the reaction between the medication and exhalation produces residual medication or reaction products in small particles, in order to reduce the particle content in inhalation and improve user comfort, the aforementioned oxygen generator also includes a powder filter 602 disposed on the inner wall of the guide tube 601. The bottom of the powder filter 602 is fixedly connected to the lower end cap 6 (e.g., welded), and the residual medication or reaction products in small particles produced after the reaction between the medication and exhalation are filtered by the medication filter 7. For example, the mesh size of the powder filter 602 is 1 to 2 mm.

[0123] In order to increase the filtration efficiency of the powder filter 602, there is a gap between the guide tube 601 and the powder filter 602. For example, the guide tube 601 is cylindrical and the powder filter 602 is a truncated cone. In this way, the truncated cone shape of the powder filter 602 can increase the contact area between oxygen and the powder filter 602, thereby improving the filtration effect and reducing the occurrence of small particles of residual reagent or reaction products clogging the air outlet on the lower end cap 6.

[0124] For example, regarding the structure of the airbag, see [link to relevant documentation]. Figures 14 to 16 The inhalation sac 9 is rectangular in shape, and the exhalation sac 8 is cylindrical in shape, which is embedded in the rectangular inhalation sac 9.

[0125] The diameter of the exhalation bag 8 is 120–150 mm (e.g., 120 mm, 130 mm, 135 mm, 140 mm, or 150 mm), the length of the exhalation bag 8 is 180–200 mm (e.g., 180 mm, 186 mm, 190 mm, 195 mm, or 200 mm), the length of the inhalation bag 9 is 200–220 mm (e.g., 200 mm, 206 mm, 210 mm, 215 mm, or 220 mm), and the width of the inhalation bag 9 is 185–200 mm (e.g., 185 mm, 188 mm, 192 mm, 195 mm, or 200 mm). The height of the inhalation sac 9 is 150–170 mm (e.g., 150 mm, 158 mm, 162 mm, 165 mm, or 170 mm). In its natural state, the gap between the inhalation sac 9 and the exhalation sac 8 in the height direction is 20–30 mm (e.g., 20 mm, 22 mm, 25 mm, 27 mm, or 30 mm), and the gap between the inhalation sac 9 and the exhalation sac 8 in the length direction is 15–23 mm (e.g., 15 mm, 18 mm, 20 mm, 22 mm, or 23 mm). This allows sufficient space to be provided for the expansion of the inhalation sac 9 and the exhalation sac 8, ensuring that they do not interfere with each other.

[0126] In order to further control the oxygen production rate, the exhalation bag 8 is equipped with an exhaust device 10 with an opening threshold pressure. When too much air is inhaled into the inhalation bag 9, the exhaust device 10 on the exhalation bag 8 will open to expel the excess exhaled air from the exhalation bag 8. At this time, the amount of exhaled air supplied to the oxygen generator will decrease, thereby reducing the amount of oxygen produced. This allows the oxygen production reaction rate in the oxygen generator to be adjusted to control the oxygen supply time.

[0127] Specifically, the structure of the exhaust component 10 includes a top cover 1001, a baffle 1002, a connecting base 1003, a spring 1004, a pull rod 1005, and a pull rope 1006. Multiple exhaust ports 1007 are provided on the top cover 1001. One end of the connecting base 1003 is connected to the baffle 1002. The other end of the connecting base 1003 passes sequentially through one side of the inhalation bag 9, one side of the exhalation bag 8, and a sealing gasket before being fixedly connected to the top cover 1001. The inhalation bag 9, the exhalation bag 8, and the sealing gasket are sandwiched between the protrusion on the outer wall of the connecting base 1003 and the top cover 1001 to achieve a sealed and fixed connection between the exhalation bag 8 and the inhalation bag 9 and the connecting base 1003. The baffle 1002 is located on the connecting base 1003. On the side away from the top cover 1001, one end of the pull rod 1005 passes through the baffle 1002 and the spring 1004 in sequence and is fixedly connected to one end of the spring 1004. The other end of the spring 1004 is fixedly connected to the connecting base 1003. The other end of the pull rod 1005 is fixedly connected to one end of the pull rope 1006. The other end of the pull rope 1006 passes through the other side of the exhalation bag 8 and is fixedly connected to the other side of the inhalation bag 9. The inhalation bag 9 is in a normal pressure state, the spring 1004 is in a compressed state, the baffle 1002 is in sealed contact with the connecting base 1003, the inhalation bag 9 is in an overpressure state, the spring 1004 is in a compressed state, and there is a gap between the baffle 1002 and the connecting base 1003. Thus, when the pressure inside the inhalation bag 9 is within the normal range, the pull rope 1006 exerts no force on the spring 1004. The spring 1004, in a compressed state, applies tension to the baffle 1002 through the pull rod 1005, causing the baffle 1002 to seal against the connecting base 1003. The exhaust port 1007 of the upper cover 1001 is isolated from the exhalation bag 8 by the connecting base 1003 and the baffle 1002. When too much air is inhaled into the inhalation bag 9, the volume of the inhalation bag 9 increases. The pull rope 1006 pulls the spring 1004 from the compressed state to the extreme compression state, thereby causing the pull rod 1005 and the baffle 1002 to move downward as a whole. The gap between the baffle 1002 and the connecting base 1003 and the exhaust port constitute the exhalation channel, realizing the exhaust.

[0128] In order to improve the sealing between the baffle 1002 and the connecting base 1003, an elastic ring 1008 is sleeved on the edge of the baffle 1002, and a cutting edge 1009 is provided on the side of the connecting base 1003 facing the baffle 1002. The cutting edge 1009 contacts the elastic ring 1008 and is partially or completely inserted into the elastic ring 1008. In this way, the sealing between the baffle 1002 and the connecting base 1003 can be effectively improved through the action between the rigid cutting edge 1009 and the elastic ring 1008.

[0129] For example, the radial cross-sectional shape of the cutting ring 1009 is a right triangle, and one of the right-angled sides of the cutting ring 1009 is connected to the connecting base 1003. In this way, the angle at which the cutting ring 1009 contacts the elastic ring 1008 must be an acute angle, thereby promoting the insertion of the cutting ring 1009 into the elastic ring 1008.

[0130] In order to enable the connection between the mask unit and the exhalation bag 8, the air bag also includes an exhalation hose and an exhalation check valve. The mask unit is connected to the air inlet / outlet 801 of the exhalation bag in sequence through the exhalation hose and the exhalation check valve.

[0131] Similarly, in order to connect the airbag 9 to the mask unit, the airbag also includes an air hose. The airbag outlet 901 is connected to the mask unit in sequence through an air one-way valve and the air hose. The air inlet of the air one-way valve is connected to the air outlet of the airbag outlet 901, the air outlet of the air one-way valve is connected to the air inlet of the air hose, and the air outlet of the air hose is connected to the mask unit.

[0132] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A control method for a long duration chemical oxygen breathing apparatus, characterized by, The respirator includes a mask unit, an indicator light strip, a breathing tube three-way valve, a handheld terminal, and a shoulder strap holder. The indicator light strip is located on the surface of the mask and within the wearer's field of vision. The indicator light strip includes multiple LEDs, which are connected in series to the main controller. The indicator light strip controller is located inside the breathing tube three-way valve. The handheld terminal contains a terminal wireless module, and the indicator light strip controller also contains an indicator light strip wireless module. The indicator light strip controller wirelessly connects to the main controller in the handheld terminal via the indicator light strip wireless module and the terminal wireless module. The shoulder strap holder has a shoulder strap pairing transmission interface and a self-starting switch. The self-starting switch and the shoulder strap pairing transmission interface are connected to the electronic dispenser and the main controller in the handheld terminal, respectively. The indicator light strip controller also contains an indicator light strip pairing transmission interface, which is connected to the shoulder strap pairing transmission interface. Detachable connection; Before the respirator is started, the breathing tube tee is inserted into the shoulder strap seat, and the LED strip pairing transmission interface inside the breathing tube tee is connected to the shoulder strap pairing transmission interface. The shoulder strap pairing transmission interface is connected to the main controller in the handheld terminal through the electronic distributor. At this time, the LED strip controller and the main controller in the handheld terminal are equivalent to a wired connection, and address pre-pairing is performed between the wireless modules of the LED strip controller and the handheld terminal, exchanging MAC addresses. When the breathing tube tee is removed and inserted into the mask, the LED strip controller inside the breathing tube tee and the handheld terminal are in wireless data transmission mode. The LED strip wireless module inside the LED strip controller receives data sent by the terminal wireless module of the handheld terminal. The LED strip controller controls and indicates that the LED strip is in the corresponding mode and displays the remaining capacity of the respirator. The control method includes the following steps: Step 1: The respirator is powered on, the handheld terminal displays the power-on interface and oxygen tank type, and performs a power level check; Step 2: After power-on, the respirator enters a low-power standby state, the display screen and alarm lights on the handheld terminal are turned off, and the main controller of the respirator enters a sleep state; Step 3: When the respirator is needed, the respirator enters a test state, checks the battery level, checks if the oxygen tank is in place, checks the air delivery fan, and checks if the self-starting switch is faulty. If a fault is found, the fault type is displayed on the display screen. If no fault is found, proceed to Step 4; Step 4: Start the oxygen tank, check the air delivery fan, check the remaining capacity alarm, check the movement status alarm, check the manual alarm, and check the cooling. In step 4, the motion state alarm detection includes the following steps: real-time acquisition of the respirator's motion state; when the respirator's rest time reaches the motion stop threshold, a motion state stop alarm is triggered; when the rest time increases from the motion stop threshold to the motion danger threshold, a motion state danger alarm is triggered; the cooling detection includes the following steps: receiving inspiratory temperature data collected by the inspiratory temperature sensor and determining whether the inspiratory temperature data exceeds the activation threshold. If the activation threshold is exceeded, the thermoelectric cooler is activated, and the intake air comes into contact with the cold side of the thermoelectric cooler to exchange heat. The cold side of the thermoelectric cooler transfers heat to the hot side of the thermoelectric cooler. If the activation threshold is not exceeded, the thermoelectric cooler remains in the off state.

2. The control method for a long-endurance chemical oxygen respirator according to claim 1, characterized in that, In step 1, the battery detection includes the following steps: The system determines whether the battery level is below a threshold. If the battery level is below the threshold, the handheld terminal sends a low battery alarm signal to the alarm controller. The alarm controller then issues an alarm based on the low battery alarm signal, and the battery icon on the handheld terminal's display shows an empty battery level. If the battery level is not below the threshold, the battery icon on the handheld terminal's display shows a full battery level.

3. The control method for a long-endurance chemical oxygen respirator according to claim 1, characterized in that, Step 4, the remaining capacity alarm detection includes the following steps: The remaining capacity of the ventilator is acquired in real time. When the remaining capacity drops to the appropriate capacity threshold, an appropriate capacity alarm is triggered; when the remaining capacity drops from the appropriate capacity threshold to the insufficient capacity threshold, an insufficient capacity alarm is triggered; when the remaining capacity drops from the insufficient capacity threshold to the withdrawal threshold, a withdrawal alarm is triggered.

4. The control method for a long-endurance chemical oxygen respirator according to claim 1, characterized in that, The manual alarm detection includes the following steps: Obtain the manual alarm signal sent by the manual alarm button, and trigger a manual alarm based on the manual alarm signal.

5. The control method for a long-endurance chemical oxygen respirator according to claim 1, characterized in that, The air guide fan detection includes the following steps: The system receives gas pressure data from the air outlet of the air intake bag collected by the pressure sensor and determines whether the gas pressure data exceeds the pressure threshold. If the gas pressure data exceeds the pressure threshold, the fan speed controller increases the fan drive voltage, and the air guide fan speed increases. If the gas pressure data does not exceed the pressure threshold, the fan speed controller keeps the fan drive voltage unchanged, and the air guide fan speed remains unchanged.

6. The control method for a long-endurance chemical oxygen respirator according to claim 1, characterized in that, Step 3, which involves detecting whether the oxygen generator is in place, includes the following steps: Step 31: Provide an oxygen candle detection circuit. The oxygen candle detection circuit includes a transistor. One end of the oxygen candle of the respirator is grounded, and the other end is connected to the emitter of the transistor. The base of the transistor is connected to the output port of the main controller of the respirator. The collector of the transistor, the power supply of the transistor and the acquisition port of the main controller are interconnected. Step 32: When identifying the oxygen candle, the output port of the main controller of the respirator is continuously applied with voltage, and the transistor is turned on. If the voltage collected and calculated by the main controller is equal to or approximately equal to the oxygen candle voltage, it means that the oxygen candle has not been used and the oxygen candle is in place. If the voltage collected by the main controller is equal to the power supply voltage, it means that the oxygen candle has been used and / or the oxygen candle is not in place.

7. The control method for a long-endurance chemical oxygen respirator according to any one of claims 1 to 6, characterized in that, The respirator includes a mask unit, which includes a mask and an indicator light strip, the indicator light strip being disposed on the surface of the mask.

8. The control method for a long-endurance chemical oxygen respirator according to claim 7, characterized in that, The indicator light strip includes 10 LED beads, which are connected in series to the main controller; Remaining capacity is 100%, all LEDs are on, and the color is green; remaining capacity is 90%, only 9 LEDs are on, and the color is green; remaining capacity is 80%, only 8 LEDs are on, and the color is green; remaining capacity is 70%, only 7 LEDs are on, and the color is green; remaining capacity is 60%, only 6 LEDs are on, and the color is green; remaining capacity is 50%, only 5 LEDs are on, and the color is yellow; remaining capacity is 40%, only 4 LEDs are on, and the color is yellow; remaining capacity is 30%, only 3 LEDs are on, and the color is yellow; remaining capacity is 20%, only 2 LEDs are on, and the color is red; remaining capacity is 10%, only 1 LED is on, and the color is red.

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