Air respirator with pressure head-up system

Technical field of air breathing apparatus equipped with pressure head-up system

[0001] The present invention relates to an air respirator equipped with a pressure head-up system, and in particular to a detection device and a display device of the pressure head-up system.

Background technique

[0002] A positive pressure air respirator is a self-contained open isolated respirator that uses compressed air as a breathing air source, and the air supply method is positive pressure, that is, when a person wears the respirator, the entire respiratory system is always Under the condition of isolation from the outside world and the internal pressure is higher than the external environment pressure, toxic and harmful gases from the outside cannot enter the respiratory system during the whole process of protection, ensuring safe and reliable respiratory protection. The equipment has been widely used in many fields such as fire fighting, chemical defense, anti-terrorism, emergency handling, and emergency rescue.

[0003] With the rapid development of my country's economy and the frequent occurrence of natural disasters in recent years, emergency rescue work has also shown a complex development trend across industries, fields, and regions. Although my country has done a lot of work in the construction of emergency rescue system, accident and disaster handling and prevention, but it is still in its infancy in many aspects such as rescue technology and tactics, especially the development of emergency rescue technology and equipment. There is still a big gap with foreign countries. . Under the current conditions that my countrys rescue team lacks advanced and supporting rescue equipment, how to maximize the effectiveness of existing equipment such as positive pressure air respirators and improve the rescue level is to quickly improve the rescue teams combat effectiveness in the short term Top priority.

[0004] The traditional positive pressure air breathing apparatus is mainly composed of high-pressure gas cylinders, pressure reducers, high-pressure air tubes, alarm whistle pressure gauges, medium-pressure air tubes, exhalation valves, face masks, backboard straps and other components, Among them, the compressed air stored in the high-pressure gas cylinder is the air source for personnel to breathe. The rated working pressure is 30MPa. Its use status and consumption are the key indicators of personnel respiratory protection. The method of monitoring these indicators is that conventional respirators only use alarms. The low-pressure alarm of the air storage volume of the respirator is carried out by means of a whistle pressure gauge, that is, when the residual pressure in the gas cylinder is (5~6) MPa, the alarm whistle will emit a 90dB alarm sound to remind the wearer to evacuate from the disaster area. The actual use situation is that the rescue site where the wearer is located is extremely noisy and the situation is very complicated. In addition, due to factors such as tension, fear, and large amount of work during the rescue process, it is difficult for rescuers to hear the low-pressure alarm sound of the respirator. It is not uncommon for many rescue professionals to suffer from suffocation and casualties due to insufficient air volume during the rescue process because they did not hear the alarm sound.

[0005] The pressure head-up system of the respirator is an important part of the positive pressure air respirator to monitor the gas storage volume of the high-pressure gas cylinder of the respirator and perform the low-pressure alarm of the gas storage volume, and the display device of the pressure head-up system of the respirator is an important part of the system , It is responsible for receiving, displaying, alarming and other functions of the data from the detection device of the respirator pressure head-up system. The data transmission between the display device and the detection device of the traditional respirator pressure head-up system is realized through a wired form, which is not only inconvenient to install and use, but also has a high failure rate and difficult maintenance. At the same time, the display device is generally integrated on the mask or the exhalation valve, usually fixed on the mask, and some manufacturers fix it on the exhalation valve. Since the display device and the detection device of the respirator pressure head-up system are in one-to-one correspondence, the respirator mask integrated with the display device also corresponds to the detection device, while the mask of the traditional respirator is a common component and is in use. It can be arbitrarily matched with each respirator, which causes great inconvenience in the use, management, maintenance, and maintenance of the mask integrated with the pressure head-up system display device, and greatly reduces the versatility, safety, and safety of the equipment. reliability. The pressure head-up system display device integrated in the exhalation valve is also the same, and will not be repeated. At present, we are looking for a way to not only ensure the various functions of the pressure head-up system display device, but also to be compatible with

The solution for the effective separation of parts such as the respirator mask or exhalation valve can be matched with each respirator to ensure its universal, safe and reliable performance. It will be of great significance to the improvement of positive pressure air respirators.

[0006] Summary of the Invention

[0007] In view of the problems in the prior art, the purpose of the present invention is to provide a respirator pressure head-up system that transmits data in a wireless form. The data detection device and the display device in the system can wirelessly transmit data, and The display device has an independent structure, and is no longer integrated with the mask or the exhalation valve, is easy to disassemble and install, and can be effectively used with any mask.

[0008] The object of the present invention is achieved through the following technical solutions: an air respirator equipped with a pressure head-up system, including a gas cylinder gas volume detection device and a gas cylinder gas volume display device, between the detection device and the display device The detection data is transmitted wirelessly. The detection device is equipped with a wireless data sending module, and the display device is equipped with a wireless data receiving module. The two modules are wirelessly connected after the signals are matched; the display device is set in the respirator in a card connection mode The face mask is fixed between the face mask window and the face mask oronasal mask, and can be used in combination with different types of face masks. The contact part of the display device and the face mask window is set in a spherical shape that fits the face mask window; the detection device passes The high-pressure gas pipe is connected with the gas cylinder, and the detection device is also equipped with a fall alarm device for the user.

[0009] Further, a circlip is provided in the middle of the display device, and the circlip is clamped and fixed on the mask exhalation valve bracket. [0010] Further, the display device is provided with a single-chip microcomputer, the wireless data receiving module is connected with the single-chip microcomputer, and the single-chip microcomputer is also connected with a wireless connection pairing button and a power supply, and the gas cylinder gas volume indicator and the gas cylinder pressure are controlled by the single-chip microcomputer. Insufficient alarm unit, pairing indicator, power supply undervoltage indicator.

[0011] Further, the gas cylinder gas volume indicator includes a gas volume alarm red light, a gas volume indicator yellow light, and a gas volume indicator green light; when the pressure of the gas cylinder is 30 MPa, the gas volume indicator green light is always on, and the pressure of the gas cylinder is 6MPa. When the gas volume indicator yellow light is always on, when the gas cylinder pressure is less than 6MPa, the gas volume alarm red light flashes all the time, and the gas cylinder pressure insufficient alarm unit will vibrate and drive the display device to vibrate.

[0012] Further, the display device is a V-shaped frame body, the gas cylinder capacity indicator light is arranged in the middle of the display device, the pairing indicator light and the power undervoltage indicator light are arranged on the right side of the display device, and the respirator is used After the person wears the mask, the gas cylinder capacity indicator light, the pairing indicator light, and the power undervoltage indicator light are all within the observable range of the respirator user; a number of spare lights are also provided on the display device.

[0013] Further, the wireless connection pairing button is used to control the wireless data receiving module to perform signal matching and wireless connection with the wireless data sending module in the detection device. The pairing indicator lights up after the two are successfully connected, and when the connection is disconnected Extinguished.

[0014] Further, the detection device is provided with a single-chip microcomputer, the wireless data sending module is connected with the single-chip microcomputer, and the single-chip microcomputer is also connected with an ambient temperature sensor, a gas cylinder pressure sensor, a motion sensor, a screen cut key, a switch/function key, The DC-DC boost circuit and power supply are controlled by a single-chip microcomputer with a display screen, sound and light alarm unit, ambient temperature alarm light, power supply undervoltage alarm light, and paired indicator light.

[0015] Further, the user's fall alarm device is composed of the motion sensor and the sound and light alarm unit, the motion sensor adopts a gyroscope, and the sound and light alarm unit includes a high-loudness sounding alarm device and a high-brightness light alarm device.

[0016] Further, when the motion sensor detects that the user of the respirator is continuously stationary for more than 30 seconds, the sound and light alarm list

The yuan sends out a pre-alarm signal for 15 seconds, during which the user cancels the pre-alarm signal through work activities or short pressing the switch/function key; when the motion sensor detects that the respirator user has been stationary for more than 45 seconds, sound and light The alarm unit sends out an alarm signal. At this time, the user can only cancel the alarm signal by short pressing the switch/function key, otherwise it will always alarm; when the pressure of the gas cylinder is less than 6MPa, the sound and light alarm unit sends out an alarm signal, the alarm The signal cannot be cancelled manually.

[0017] Further, pressing the screen cut key and the switch/function key at the same time causes the detection device to enter the wireless connection pairing state. At this time, the pairing indicator flashes, and after the wireless connection is successful, the pairing indicator flashes once every few seconds.

[0018] Further, when the ambient temperature sensor detects that the ambient temperature of the person using the respirator exceeds a set value, the ambient temperature warning light turns on.

[0019] Further, long press the cut screen key, the detection device shown starts the active call for help mode, and the sound and light alarm unit sends out an alarm signal.

[0020] Further, the gas cylinder pressure sensor converts the pressure value of the gas cylinder into a corresponding voltage signal, and when the gas cylinder is opened, the gas cylinder pressure sensor outputs a corresponding voltage signal to the ultra-low power dormancy The state of the single-chip microcomputer, the single-chip microcomputer controls the output power of the DC-DC boost circuit to realize the automatic start-up function of the detection device.

[0021] Further, the single-chip microcomputer calculates the gas storage capacity of the gas storage cylinder according to the voltage signal provided by the gas storage pressure sensor, and dynamically calculates the use time of the remaining gas according to the gas consumption of the user in the first 3 seconds, and displays it on the display screen That time.

[0022] Further, the wireless data sending module and the wireless data receiving module adopt a Bluetooth module; the display adopts a liquid crystal screen, is equipped with a liquid crystal backlight control circuit, and adjusts the brightness of the display screen by short pressing the switch/function key.

[0023] Further, the display screen displays two interfaces, one only displays the pressure value of the gas cylinder, and the other displays the pressure value of the gas cylinder, the remaining gas usage time and the ambient temperature, which are displayed by short pressing the cut screen key Switching of the interface.

[0024] Further, the detection device is also provided with a mechanical pressure gauge, and a mechanical alarm whistle is provided at the connection between the detection device and the high-pressure air pipe.

[0025] Further, after the first wireless connection between the display device and the detection device is successful, when the detection device is turned off, the display device enters a standby state, and when the detection device is turned on again, the display device is automatically activated from the standby state and enters the working state, and Automatically wirelessly connect with the detection device, and the single-chip microcomputer of the display device controls the gas volume indicator light of the gas cylinder to light up according to the pressure value detection signal received by the wireless receiving module.

[0026] Further, after the first wireless connection between the display device and the detection device is successful, when the distance between the two goes beyond the range and enters the connection range again, the display device and the detection device will automatically be wirelessly connected.

[0027] The air respirator provided with the above structure has the following advantages: The data detection device and the display device in the system can wirelessly transmit data, which facilitates installation and use, greatly reduces the system failure rate, and is also convenient for maintenance and maintenance .

[0028] The display device in the system has an independent structure, is no longer integrated with the mask or exhalation valve, is easy to disassemble and install, and can be effectively used with any type of mask, which is convenient for use, management, maintenance, and maintenance. The versatility, safety and reliability of the equipment.

[0029] The detection device in the system also has a user's fall alarm function, which automatically activates the sound and light alarm unit after the user has been stationary for a long time, and realizes the automatic call for help function through the high-loudness warning sound and high-brightness light. When encountering danger, the user can manually start the sound and light alarm unit to realize the active call for help function and improve the safety guarantee performance of the equipment.

[0030] The detection device in the system also has an ambient temperature alarm function. When the ambient temperature sensor detects that the ambient temperature of the respirator user exceeds the set value, the ambient temperature warning light will light up, indicating that the current environment is not suitable for continuing operations. Remind the user to evacuate the work site in time.

Description of the drawings

[0031] FIG. 1 is a front view of the display device used in the present invention; FIG. 2 is a top view of the display device used in the present invention; FIG. 3 is a left side view of the display device used in the present invention; FIG. 4 is a display device used in the present invention Figure 5 is a front view of the mask used in the present invention; Figure 6 is a rear view of the mask used in the present invention; Figure 7 is a right side view of the mask used in the present invention; Figure 8 is a face mask and display used in the present invention Front view of the device after assembly; Figure 9 is a rear view of the face mask and display device used in the present invention after assembly; Figure 10 is a right side view of the face mask and display device used in the present invention after assembly; Figure 11 is a schematic view of the structure of the present invention; Figure 12 is a front view of the detection device used in the present invention; Figure 13 is a left side view of the detection device used in the present invention; Figure 14 is a right side view of the detection device used in the present invention; Figure 15 is the circuit of the detection device used in the present invention Principle diagram; Figure 16 is a circuit diagram of the display device used in the present invention.

[0032] In Figure 1-10: 1. The main frame; 2. The circuit cover; 3. The gas volume alarm red light; 4. The gas volume indicator yellow light; 5. The gas volume indicator green light; Press indicator light; 8. Pairing indicator light; 9. Left compartment cover; 10. Pairing button;

11. Mask circlip; 12. Battery compartment cover knob; 13. Battery compartment; 14. Right compartment cover; 15. Spare lamp set; 16. Mask; 17, display device; 18. Exhalation valve; 19. Exhalation Valve bracket; 20, oronasal mask; 21, mask window.

[0033] In Figure 11-16: 22, medium pressure gas pipe; 23, high pressure gas pipe; 24, detection device; 25, back plate; 26, pressure reducer; 27, bottle valve; 28, high pressure gas cylinder; 29, Strap; 30, battery compartment; 31, cut screen/call for help button; 32, ambient temperature warning light; 33, power undervoltage warning light; 34, pairing indicator; 35, display screen; 36, battery compartment button; 37, pointer Type pressure gauge; 38, switch/function keys; 39, sound and light alarm unit; 40, mechanical gas whistle.

Detailed ways

[0034] In order to further illustrate the technical means and effects of the present invention to achieve the intended purpose of the invention, the structure and work flow of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0035] As shown in FIGS. 1, 2, 11, and 12 are one of the embodiments of the present invention. In this embodiment, an air respirator equipped with a pressure head-up system includes a gas cylinder volume detection device 24 and The gas cylinder gas volume display device 17, the detection device 24 and the display device 17 transmit detection data in a wireless manner. The detection device 24 is provided with a wireless data sending module, and the display device 17 is provided with a wireless data receiving module. After the signals are matched, connect wirelessly. In this embodiment, these two modules both use a Bluetooth module with a frequency of 2.4 GHz. Of course, this patent is not limited to this form of wireless transmission. It can be used for other wireless transmission technologies applicable in the prior art. use.

[0036] As shown in FIG. 8, FIG. 9, and FIG. 10, the display device 17 is arranged in the mask 16 of the respirator in a snap-fit manner, and is fixed between the mask window 21 and the mask oronasal mask 20, and can be connected to different types of masks. The face mask is used in combination, and the contact part of the display device 17 and the face mask window 21 is set in a spherical shape that is attached to the face mask window 21; the detection device 24 is connected to the high-pressure gas cylinder 28 through the high-pressure air pipe 23.

[0037] In order to improve the protection function for the user, the detection device 24 is also provided with a fall alarm device for the user. The working principle of the device will be described in detail in the following content.

[0038] The main equipment of the present invention will be described in detail in sections below.

[0039]) Display device The structure of the display device is shown in Figure 1, Figure 2, Figure 3, Figure 4. The display device is a V-shaped frame body with two open left and right arms. The included angle is 91 degrees toward the face of the user, which is basically consistent with the internal dimensions of the currently commonly used respirator mask. The contact parts between the display device and the mask window 21 are the left side cover 9 and the right side cover 14, both of which are arranged in a spherical shape.

[0040] As shown in FIG. 1, a circlip 11 is provided in the middle of the main body frame 1, and the circlip 11 is clamped and fixed on the mask exhalation valve bracket 19. The mask without a display device is shown in Figures 5, 6, and 7. Of course, this is only one type of mask. Other types of masks can be combined with the display device in this embodiment as long as they are equipped with an exhalation valve.

[0041] In this embodiment, the principle block diagram of the display device is shown in FIG. 16, a single-chip microcomputer is provided, a wireless data receiving module is connected to the single-chip microcomputer, and a wireless connection pairing button and a power supply are also connected to the single-chip microcomputer. Cylinder gas quantity indicator light, low pressure alarm unit of gas storage cylinder, matching indicator light, power supply undervoltage indicator light.

[0042] As shown in Figure 1, the gas cylinder gas volume indicator includes a gas volume alarm red light 3, a gas volume indicator yellow light 4, and a gas volume indicator green light 5; when the pressure of the gas cylinder is 30 MPa, the gas volume indicator green light 5 is always on, 6 MPa W When the gas cylinder pressure is less than 10MPa, the gas volume indicator yellow light 4 is always on, and when the gas cylinder pressure is less than 6MPa, the gas volume alarm red light 3 flashes all the time, and the gas cylinder pressure insufficient alarm unit will vibrate and drive the display device to vibrate.

[0043] As shown in Figures 1 and 9, the gas cylinder indicator light is set in the middle of the display device, the pairing indicator light 8, the power undervoltage indicator light 7 are set on the right side of the display device, and the respirator user wears a mask After the 16th, the gas cylinder capacity indicator, the matching indicator 8, and the power undervoltage indicator 7 are all within the vision range that is easy to observe by the user of the respirator. The display device is also provided with a number of spare lamps, such as the spare indicator light 6 and the spare lamp group 15 as shown in FIG. 1, which can be used for the function expansion of the display device or the function replacement when the device fails.

[0044] The wireless connection pairing button is used to control the wireless data receiving module to perform signal matching and wireless connection with the wireless data sending module in the detection device. The pairing indicator lights up after the two are successfully connected, and goes out when the connection is disconnected. Before using a set of air respirators, you need to pair the two modules first. After the pairing is successful, it will not mix and match with the wireless modules between other air respirators during use, which can effectively avoid receiving incorrect data. The situation happened.

[0045] The detection device in this embodiment, the principle block diagram of the detection device is shown in FIG. 15. A single-chip microcomputer is provided, and the wireless data transmission module is connected with the single-chip microcomputer. The single-chip microcomputer is also connected with an ambient temperature sensor, a gas cylinder pressure sensor, and Sensors, cut screen keys, switch/function keys, DC-DC boost circuit, power supply, controlled by a single-chip microcomputer, have a display screen, sound and light alarm unit, ambient temperature alarm light, power supply undervoltage alarm light, and pairing indicator light.

[0046] The detection device in this embodiment adopts low power consumption processing, and the power supply adopts 2 ordinary AAA dry batteries to supply power to meet the work requirements, and the single-chip control unit is supplied with power through the anti-reverse connection circuit. When the machine is turned off or not connected to the gas cylinder,

The chip machine is in an ultra-low-power sleep state with an average quiescent current of 50 μA. In this state, ordinary 2 AAA dry batteries can be used for one year.

[0047] The user's fall alarm device is composed of a motion sensor and a sound and light alarm unit. The motion sensor uses a gyroscope. The sound and light alarm unit includes a high-loudness sounding alarm device and a high-brightness light alarm device. It is composed of bright LED lights.

[0048] When the motion sensor detects that the user of the respirator is continuously still for more than 30 seconds, the sound and light alarm unit will send out a pre-alarm signal for 15 seconds. During this period, the user can cancel by working activities or short pressing the switch/function key. Pre-alarm signal; when the motion sensor detects that the user of the respirator has been stationary for more than 45 seconds, the sound and light alarm unit will send an alarm signal. At this time, the user can only cancel the alarm signal by short pressing the switch/function key, otherwise Always call the police and realize the automatic call for help function.

[0049] When the pressure of the gas cylinder is less than 6MPa, the sound and light alarm unit will also send out an alarm signal to remind the user to evacuate the scene in time, and the alarm signal cannot be manually cancelled.

[0050] The single-chip microcomputer judges whether the key is long-pressed or short-pressed by calculating the length of the key press time through an internal timer/counter.

[0051] The external structure of the detection device is shown in Figures 12, 13, and 14, the bottom of the device housing is connected to the high-pressure end of the pressure reducer 26 through a high-pressure air pipe 23, the screen cut/help key 31 and the switch/function key 38 Located on both sides of the device housing; the display screen 35 is located on the front of the device housing; the ambient temperature warning light 32 (red), the power undervoltage warning light 33 (yellow), and the pairing indicator 34 (blue) are three LED lights , Located on one side of the display screen 35; the pointer pressure gauge 37 is located below the display screen 35; the sound and light alarm unit 39 is located below the pointer pressure gauge 37.

[0052] Simultaneously press and hold the screen cut/help key 31 and the switch/function key 38 to make the detection device enter the wireless connection pairing state. At this time, the pairing indicator 34 flashes, and the pairing state lasts for 30 seconds. In this state, press and hold The pairing button 10 of the display device lasts for 2 seconds to complete the pairing. After the pairing is successful, the pairing indicator 34 flashes once every 3 seconds, indicating that it is in the connected state.

[0053] The ambient temperature sensor can convert the ambient temperature into an electrical signal corresponding to it and provide it to the single-chip microcomputer. When the ambient temperature sensor detects that the ambient temperature of the respirator user exceeds the set value, the ambient temperature warning light turns on to indicate The current environment is not suitable for continuing operations, prompting users to evacuate the work site in time.

[0054] When the user encounters danger, long press the cut screen/call for help key 31, the detection device starts the active call for help mode, the sound and light alarm unit sends out an alarm signal, and the active call for help and automatic call for help constitute a complete call for help, thereby improving Improve the safety and security performance of the product.

[0055] The gas cylinder pressure sensor converts the pressure value of the gas cylinder into a corresponding voltage signal. When the gas cylinder is opened, the gas cylinder pressure sensor outputs the corresponding voltage signal to the single-chip microcomputer in the ultra-low power consumption sleep state, The single-chip microcomputer controls the output power of the DC-DC boost circuit to realize the automatic startup function of the detection device.

[0056] The single-chip microcomputer calculates the gas storage capacity of the gas storage cylinder according to the voltage signal provided by the gas storage pressure sensor, and dynamically calculates the use time of the remaining gas according to the gas consumption of the user in the first 3 seconds, and displays the time on the display screen 35.

[0057] In this embodiment, the display screen 35 adopts a liquid crystal screen and is equipped with a liquid crystal backlight control circuit, and the brightness of the display screen is adjusted by short pressing the switch/function key 38.

[0058] The display screen 35 displays two interfaces, one only displays the pressure value of the gas cylinder, the other displays the pressure value of the gas cylinder, the remaining gas usage time and the ambient temperature, which are displayed by short pressing the screen cut/distress key 31 The interface switching provides more choices for users and improves the ease of use of the equipment.

[0059] In this embodiment, the detection device is also provided with a pointer pressure gauge 37, and a mechanical gas whistle 40 is provided at the connection between the detection device and the high-pressure gas pipe 23 to realize the mechanical and digital dual-system display of the pressure of the gas cylinder. ,Ensure safety.

[0060] When the present invention is used, first open the gas cylinder valve 27, the compressed air stored in the high-pressure gas cylinder 28 at a rated working pressure of 30MPa is reduced to 0.6~1. OMPa, through the pressure reducer 26 The air pressure tube 22 is delivered to the exhalation valve 18 for the mask 16 to breathe. The detection device 24 collects the compressed air pressure in the high-pressure gas cylinder 28 through the high-pressure air pipe 23 to realize the functions of pressure display, low-pressure alarm, and signal transmission to the display device 17. The display device 17 can realize the gas volume indication and low pressure by receiving the signal from the detection device 24 Flashing lights, vibration alarm and other functions.

[0061] After the first wireless connection between the display device and the detection device is successful, when the detection device is turned off, the display device enters the standby state, and when the detection device is turned on again, the display device is automatically activated from the standby state to the working state, and automatically interacts with the detection device. The wireless connection is performed, and the single-chip microcomputer of the display device controls the gas volume indicator of the gas cylinder to light up according to the pressure value detection signal received by the wireless receiving module.

[0062] After the first wireless connection between the display device and the detection device is successful, when the distance between the two goes beyond the range and enters the connection range again, the display device and the detection device will automatically be wirelessly connected.

[0063] The above is only to illustrate the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various modifications that conform to the idea of the present invention are all within the protection scope of the present invention.