Double-layer buffering decompression type respirator mask

Abstract

The invention discloses a double-layer buffering pressure reduction type respirator mask, and relates to the technical field of respirator masks, the double-layer buffering pressure reduction type respirator mask comprises a mask body and a shell, and the mask body is provided with an adjusting assembly and a temperature control assembly; the adjusting assembly comprises a bottom plate, a first air bag and a second air bag are installed on the bottom plate, and an air pump is installed in the shell. The temperature control assembly comprises installation holes in the two sides, temperature and pressure sensors are installed in the installation holes in the two sides, and the temperature control assembly further comprises a gel layer. Linkage is achieved through the temperature control assembly, the adjusting assembly and the control module, when pressure fluctuation is caused by thermal expansion and cold contraction of the air bags due to temperature changes, the control module can adjust the inflation pipe valve and the air pump in real time, it is ensured that the internal pressure of the first air bag and the second air bag is stabilized in a pressure reduction interval, temperature and pressure two-parameter cooperative regulation is achieved, the temperature control effect is guaranteed, and the safety is improved. The buffering and pressure reducing functions of the air bag on the nose bridge and the cheek area are not affected, and the situation that sealing performance is reduced or oppression is aggravated due to single adjustment is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of respirator masks, in particular to a double-layer cushioning and pressure-reducing respirator mask. BACKGROUND

[0002] A respirator mask is a key component in a respirator-assisted breathing treatment system, mainly used to establish airtight connection between the patient's respiratory tract and the respirator, and is a core interface device for realizing gas delivery and breathing support. It forms a closed space by fitting the patient's face (nose, mouth or nose and mouth area) to stably deliver the pressurized gas (such as oxygen, mixed gas) output by the respirator to the patient's lungs, while discharging the exhaled gas of the patient, thereby ensuring the effectiveness of the breathing support treatment. The respirator mask forms a closed environment by fitting the face to avoid gas leakage and ensure that the pressure and flow rate of the output by the respirator accurately act on the respiratory tract to maintain airway patency (especially suitable for scenarios requiring airway positive pressure support, such as continuous positive airway pressure in the treatment of sleep apnea syndrome); at the same time, the respirator mask, as the terminal of the gas passage, delivers oxygen-containing gas, humidified gas and other gases generated by the respirator to the patient's body, while guiding the exhaled carbon dioxide and other waste gases to the outside of the body.

[0003] In Chinese patent application No. 201920982891, a respirator mask is disclosed, which increases a plurality of working channels (through holes on the pipe joint) on the mask, so that related operations such as atomization, oxygen inhalation and gastric tube can be performed under the premise of removing the mask body, at the same time, a sealing ring is arranged on the soft tube sealing cover to ensure good sealing effect when the soft tube is inserted, further, the nose cavity and the pressure-reducing pad are arranged to avoid the occurrence of pressure sores.

[0004] The existing respirator mask concentrates long-term pressure on the bony protruding parts such as the nasal bridge, zygomatic bone and mandible when worn by the patient for a long time, which easily leads to local skin blood circulation obstruction. The performance is that: redness and tenderness appear in the early stage, and long-term development can lead to pressure injury (especially for elderly patients, patients with poor skin elasticity or malnutrition); and the friction between the edge of some hard masks and the skin can cause abrasions or skin breaks, increasing the risk of infection (such as secondary folliculitis or skin soft tissue infection in ICU patients with low immunity; at the same time, the relatively closed space formed inside the mask, the humid and hot gas (containing water and carbon dioxide) exhaled by the patient mixes with the dry gas sent by the respirator, which easily leads to local temperature rise (usually 3-5℃ higher than the ambient temperature), causing facial sweating, skin moisture, sticky feeling and aggravation of patient discomfort, thus a double-layer cushioning and pressure-reducing respirator mask is proposed to solve the problems in the background art. SUMMARY

[0005] The invention aims to provide a double-layer cushioning pressure-reducing respirator mask to solve the problem of discomfort of the respirator mask in the prior art when worn by patients for a long time.

[0006] To achieve the above-mentioned purpose, the invention provides the following technical solution: a double-layer cushioning pressure-reducing respirator mask, comprising a mask body and a shell, wherein an adjusting assembly and a temperature control assembly are arranged on the mask body.

[0007] The adjusting assembly comprises a bottom plate, wherein an air bag one and an air bag two are mounted on the bottom plate, the air bag one and the air bag two are in communication, an air inlet pipe is mounted on the air bag one, an air exchange pipe is arranged at the top of the shell, an air charging pipe is mounted at the top of one side of the shell, and an air pump is mounted in the shell.

[0008] The temperature control assembly comprises two side mounting holes, which are symmetrically arranged at the bottom of the mask body, and a temperature and pressure sensor is mounted in each of the two side mounting holes, the temperature control assembly further comprises a gel layer, a circulation pipe one is symmetrically mounted on one side of the gel layer, a circulation pipe two is symmetrically mounted on the other side of the shell, a circulation box is mounted in the shell, and a circulation pump is arranged below the circulation box.

[0009] Further, mounting rings are symmetrically mounted on the surface of the mask body, a breathing pipe is mounted on the mask body, and a headband is mounted on each of the two mounting rings.

[0010] Further, a plurality of pin holes are arranged on the mask body, a plurality of positioning pins are mounted at the bottom of the bottom plate, and the number and positions of the pin holes and the positioning pins are correspondingly arranged.

[0011] Further, a control panel is mounted on the surface of the shell, a control module, a signal processing module, and a signal receiving module are mounted in the shell, and the control module, the signal processing module, and the signal receiving module are electrically connected.

[0012] Further, a valve is mounted on each of the air charging pipe, the circulation pipe one, and the circulation pipe two.

[0013] Further, the air bag one is arranged in the cheek area of the mask body, and the air bag two is arranged in the nose bridge area of the mask body.

[0014] Further, the gel layer is mounted on the bottom plate, and the air bag one and the air bag two are arranged below the gel layer.

[0015] Further, the air exchange pipe and the air charging pipe are connected with the air pump, the circulation pipe two is connected with the circulation pump, and the circulation pump is connected with the circulation box through a pipeline.

[0016] Compared with the prior art, the double-layer buffer pressure-reducing respirator mask has the beneficial effects that:

[0017] 1. The temperature control assembly and the adjusting assembly (air bag system) are linked through the control module: the temperature and pressure sensor synchronously monitors the pressure parameter, when the temperature changes cause the air bag to expand or shrink due to heat, the control module will adjust the air pump and the valve of the inflation pipe in real time to ensure that the internal pressure of the air bag 1 and 2 is stable in the pressure reduction range of 2-5 kPa; this kind of temperature and pressure double parameter cooperative regulation not only ensures the temperature control effect, but also does not affect the buffer and pressure reduction function of the air bag on the nasal bridge and cheek area, avoiding the decrease of sealing performance or the increase of compression caused by single regulation;

[0018] 2. The gel layer adopts medical hydrophilic gel material, which is soft and has strong skin adhesion, can adapt to the deformation of the face contour, and reduce the friction and irritation of the skin; at the same time, its moisturizing property can relieve the dry skin caused by long-term wearing; the circulating medium (cooling liquid) and the pipeline (medical silica gel) are both biocompatible materials without allergenic risk, and can significantly reduce the incidence of skin problems such as facial swelling, pressure sores and allergies, especially suitable for people with sensitive skin or long-term wearing (such as ICU patients and sleep apnea syndrome patients);

[0019] 3. The temperature control assembly can realize automatic adjustment through the cooperation of the control module, the signal processing module and the control panel: after the user sets the temperature threshold, the system can automatically start and stop the circulating pump and adjust the valve opening according to the real-time feedback of the sensor, without frequent manual operation; this design is especially friendly for patients with limited mobility or night use, which not only ensures the adjustment accuracy, but also reduces the disturbance to the patient's rest;

[0020] 4. Through the design of the temperature control assembly, the respirator mask is not limited by the environment temperature during use: in high temperature environment, the low temperature medium can be circulated to dissipate heat, and in low temperature environment (if the circulating box is equipped with a heating module), the high temperature medium can be used to increase the temperature, meeting the needs of patients with different physical conditions in different climate regions. At the same time, the quick connector design of the circulating pipeline is convenient for disassembly and cleaning, the circulating box can be regularly replaced with medium to ensure the hygiene and safety of long-term use, and the practicability and reliability of the product are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0022] Figure 1 The whole structure schematic diagram of the mask body provided by the embodiment of the present application;

[0023] Figure 2 The rear side structure diagram of the mask body provided by the embodiment of the present application is shown in the figure;

[0024] Figure 3 The installation structure diagram of the temperature and pressure sensor provided by the embodiment of the present application is shown in the figure;

[0025] Figure 4 The bottom plate structure diagram provided by the embodiment of the present application is shown in the figure;

[0026] Figure 5 The air bag structure diagram provided by the embodiment of the present application is shown in the figure;

[0027] Figure 6 The overall structure diagram of the shell provided by the embodiment of the present application is shown in the figure;

[0028] Figure 7 The internal structure diagram of the shell provided by the embodiment of the present application is shown in the figure.

[0029] Explanation of reference signs:

[0030] 1, mask body; 2, mounting ring; 3, breathing tube; 4, headband; 5, adjusting assembly; 6, temperature control assembly; 7, pin hole; 8, positioning pin; 9, shell; 10, control panel; 11, valve; 12, control module; 13, signal processing module; 14, signal receiving module; 51, bottom plate; 52, air bag one; 53, air bag two; 54, air conveying tube; 55, air exchange tube; 56, air filling tube; 57, air pump; 61, mounting hole; 62, temperature and pressure sensor; 63, gel layer; 64, circulation tube one; 65, circulation tube two; 66, circulation tank; 67, circulation pump. DETAILED DESCRIPTION

[0031] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings.

[0032] As shown in the drawings Figure 1 to the drawings: Figure 6

[0033] Example one:

[0034] ​The application provides a double-layer buffer pressure reducing respirator mask, which comprises a mask body 1 (the mask body 1 is used as a core bearing part, is made of medical-grade polycarbonate material, has the characteristics of light weight and impact resistance, and the edge is designed as a circular arc transition to reduce hard friction when contacting the face) and a shell 9, the surface of the mask body 1 is symmetrically provided with a mounting ring 2 (the mounting ring 2 is made of high-strength nylon material, is fixed with the mask body 1 through an ultrasonic welding process to ensure the connection strength, and the inner side of the mounting ring 2 is provided with anti-skid lines to enhance the friction when the headband 4 passes through, so that the mask is prevented from being displaced due to the sliding of the headband 4 during wearing), the mask body 1 is provided with a breathing pipe 3 (the breathing pipe 3 on the mask body 1 is made of food-grade silicone material and has good flexibility, the connection part of the breathing pipe 3 and the mask body 1 is provided with a corrugated buffer section to reduce the pulling of the pipe on the face when the patient's head moves and ensure the sealing of gas circulation), the two side mounting rings 2 are provided with headbands 4 (the headbands 4 are made of high-elasticity spandex and cotton fiber blended material, have sufficient tensile strength and good air permeability, the end part of the headbands 4 is provided with a magic tape adjusting structure, the wearing tightness of the patient can be quickly adjusted according to the head circumference, the headbands 4 can also be provided with a detachable structure with buckles, and the actual use demand is selected), the mask body 1 is provided with an adjusting assembly 5 and a temperature control assembly 6, a plurality of pin holes 7 are formed in the mask body 1, a plurality of positioning pins 8 are installed at the bottom of the bottom plate 51, and the number and positions of the pin holes 7 and the positioning pins 8 are correspondingly arranged (the positioning pin 8 is designed in a conical shape, forms an interference fit with the pin hole 7 (an elastic silicone ring is arranged on the inner wall) on the mask body 1, can be quickly positioned and installed, and the position can be adjusted by replacing the positioning pin 8 with different lengths to adapt to patients with different face contours and improve the basic fit).

[0035] The adjusting assembly 5 comprises a bottom plate 51 (the bottom plate 51 is made of medical-grade ABS plastic, with a thickness of only 1-2 mm, which not only ensures the structural strength but also reduces the weight), and the bottom plate 51 is installed with an air bag one 52 and an air bag two 53 (both the air bag one 52 and the air bag two 53 are made of medical liquid silicone injection molding, with excellent elasticity and biocompatibility; among them, the air bag one 52 is adapted to the round contour of the cheek, with a larger volume than the air bag two 53 and a slightly thicker thickness (about 0.5-0.8 mm), which can cover the transition area from the malar bone to the lower jaw and disperse the pressure through a large area of contact; the air bag two 53 is designed as an arc structure according to the physiological curve of the human nose bridge, with a relatively thin thickness (about 0.3-0.5 mm), which can tightly fit the two sides of the nose bridge after inflation, avoiding the direct pressure of the edge of the traditional mask on the nasal bone; the inner sides of the two are connected through 3-4 hidden micro-channels with a diameter of about 1 mm, which ensures the synchronous change of the internal pressure of the two air bags when inflated, avoiding uneven fitting caused by local pressure imbalance), the air bag one 52 and the air bag two 53 are connected, the air bag one 52 is arranged in the cheek area of the mask body 1, the air bag two 53 is arranged in the nose bridge area of the mask body 1, the air bag one 52 is installed with a gas delivery pipe 54 (the gas delivery pipe 54 on the air bag one 52 is made of polyvinyl chloride with a pipe diameter of about 6 mm, the connection between the gas delivery pipe 54 and the air bag is made by integral molding process to eliminate the risk of air leakage, and the end of the gas delivery pipe 54 can be equipped with a standard luer connector for quick connection with the inflation pipe 56 of the shell 9 through a medical hose, and a sealing ring is arranged at the connection), the shell 9 is provided with an air exchange pipe 55 at the top (the air exchange pipe 55 is provided with a HEPA filter screen inside, which can filter dust, bacteria and other impurities in the external air to ensure the cleanliness of the gas entering the air bag), the shell 9 is installed with an inflation pipe 56 at the top on one side, and the shell 9 is installed with a gas pump 57 inside, the air exchange pipe 55 and the inflation pipe 56 are connected with the gas pump 57, (the gas pump 57 is connected with the air exchange pipe 55 and the inflation pipe 56 through pipelines, and the working mode can be switched by an internal valve 11: when inflated, the external gas enters the gas pump 57 through the air exchange pipe 55, is pressurized and then injected into the air bag through the inflation pipe 56 and the gas delivery pipe 54; when deflated, the gas in the air bag flows back to the gas pump 57 through the gas delivery pipe 54 and the inflation pipe 56, and then is discharged through the air exchange pipe 55, realizing precise adjustment of the internal pressure of the air bag, and the adjustment range can be set to 1-8 kPa).

[0036] Working principle: in use, the bottom plate 51 of the adjusting assembly 5 is fixed on the mask body 1 through the cooperation of the positioning pin 8 and the pin hole 7, at this time the patient wears the mask body 1, adjusts the tightness through the headband 4 on the mounting ring 2, so that the air bag one 52 corresponds to the cheek area of the patient's face, and the air bag two 53 corresponds to the nose bridge area of the patient's face; the subsequent use of the hose connects the gas conveying pipe 54 and the inflation pipe 56, at this time the gas pump 57 inside the shell 9 is started, the gas pump 57 inhales external gas through the air exchange pipe 55, and then inflates the air bag one 52 and the air bag two 53 through the gas conveying pipe 54; since the inside of the air bag one 52 and the air bag two 53 is communicated, the internal gas pressure of the two is consistent, and after inflation, they are attached to the face, the elastic buffer of the air bag one 52 and the air bag two 53 is used to reduce the pressure of the mask body 1 on the nose bridge and the cheek, and the pressure relief effect is realized. When the gas pressure needs to be adjusted, the gas pump 57 discharges the gas in the air bag one 52 and the air bag two 53 through the air exchange pipe 55, until the appropriate pressure is reached, so as to flexibly adjust the buffer degree and improve the wearing comfort.

[0037] Example two:

[0038] The difference between the present embodiment and the previous embodiment is that the temperature control assembly 6 comprises two side mounting holes 61 symmetrically arranged at the bottom of the mask body 1, and a temperature and pressure sensor 62 is mounted in each of the two side mounting holes 61. The two side mounting holes 61 are symmetrically arranged at the bottom of the mask body 1 (close to the lower jaw edge position), with a hole diameter of about 8-10 mm, and the hole wall is designed in a stepped manner to provide a stable mounting base for the temperature and pressure sensor 62 and ensure the air tightness of the mask through the inner silicone seal ring. The temperature and pressure sensor 62 mounted in the mounting hole 61 is a high-precision MEMS (Micro-Electro-Mechanical System) sensor that can simultaneously and real-time monitor the temperature (detection range 25-40℃, accuracy ±0.2℃) and air pressure (linked with the air pressure in the air bag, detection range 1-10kPa) in the mask. The exposed part of the probe is made of medical-grade ceramic material to avoid irritation when directly contacting the face. The sensor lead is connected to the signal transmitter through the built-in button cell in the mask body 1 to realize real-time data transmission. The temperature control assembly 6 further comprises a gel layer 63 mounted on the bottom plate 51, and the air bag one 52 and the air bag two 53 are arranged below the gel layer 63. The gel layer 63 is made of medical hydrophilic gel with a thickness of about 2-3 mm, which has the characteristics of soft skin, high thermal conductivity (about 0.6 W / (m·K)) and good moisturizing property. The gel layer 63 is fixed on the inner side of the bottom plate 51 by medical pressure-sensitive adhesive and can adaptively deform with the facial contour when in contact with the face, which not only enhances the buffering effect between the air bag one 52, the air bag two 53 and the skin, but also neutralizes the local temperature difference after the air bag is inflated through its temperature regulation capability. Since the air bag one 52 and the air bag two 53 are arranged inside the gel layer 63 (i.e. the gel layer 63 is located between the air bag and the skin), the air pressure buffering of the air bag and the temperature regulation of the gel layer 63 form a double protection to avoid sudden temperature change or pressure concentration causing irritation to the skin. The gel layer 63 is symmetrically mounted with a circulation pipe one 64 on one side, and a circulation pipe two 65 is symmetrically mounted on the other side of the shell 9 (the circulation pipe one 64 is made of medical-grade silicone hose (inner diameter 3-4 mm, wall thickness 0.5 mm), and the pipe body is S-shaped embedded in the gel layer 63 (without penetrating the surface of the gel layer 63), which increases the contact area with the gel layer 63 through the winding path to improve the heat exchange efficiency.Two ends of the circulation pipe one 64 extend to the edge of the mask body 1 and are connected to the circulation pipe two 65 on the other side of the shell 9 through the quick connector. The circulation pipe two 65 is selected from the same specification of silica gel pipe, the end of which is connected to the circulation pump 67 inside the shell 9, forming a closed circulation passage. The circulation tank 66 is installed inside the shell 9 (the circulation tank 66 is made of food-grade PP material, and the circulation tank 66 is filled with cooling liquid inside; the capacity of the circulation tank 66 is designed according to the volume of the mask body 1, so that the cooling liquid inside the circulation tank 66 can circulate; a detachable cover plate is arranged on the top of the circulation tank 66, which is convenient for replacing the medium later), and a circulation pump 67 is arranged below the circulation tank 66 (the circulation pump 67 is a miniature peristaltic pump, which has the characteristics of adjustable flow (0-50mL / min) and low noise (working noise ≤35dB); the input end of the circulation pump 67 is connected to the bottom of the circulation tank 66 through a pipeline, and the output end is connected to the circulation pipe two 65, which can drive the medium to flow continuously in the passage composed of the circulation pipe one 64 and the circulation pipe two 65, so as to realize heat transfer and exchange); the circulation pipe two 65 is connected to the circulation pump 67, and the circulation pump 67 is connected to the circulation tank 66 through a pipeline; the valve 11 is arranged on the inflation pipe 56, the circulation pipe one 64 and the circulation pipe two 65 (the valve 11 arranged on the inflation pipe 56, the circulation pipe one 64 and the circulation pipe two 65 is an electromagnetic proportional valve, which can accurately adjust the opening degree (0%~100%) through the electric signal of the control module 12; the valve 11 on the inflation pipe 56 is used to control the inflation and exhaust rate of the air bag in cooperation with the air pump 57; the valve 11 on the circulation pipe is used to adjust the circulation flow of the temperature control medium, so as to control the temperature change rate of the gel layer 63, and avoid the discomfort caused by sudden temperature rise and fall).

[0039] The control panel 10 is mounted on the surface of the shell 9, and the control module 12, the signal processing module 13 and the signal receiving module 14 are mounted inside the shell 9, and the control module 12, the signal processing module 13 and the signal receiving module 14 are electrically connected (the control panel 10 on the surface of the shell 9 integrates an LCD display screen and physical buttons (or touch buttons), the display screen can display real-time parameters such as the current temperature in the mask, the air bag pressure and the liquid level of the circulating tank 66, and the buttons are used to set the temperature threshold (such as the default 28-32℃), the pressure range and the working mode (manual / automatic); the control module 12 (using an STM32 series single-chip microcomputer) inside the shell 9 serves as the system core and is electrically connected with the signal processing module 13 and the signal receiving module 14 through an SPI bus: the signal receiving module 14 is responsible for receiving the original signals of the temperature and pressure sensor 62 and converting them into electrical signals; the signal processing module 13 filters, amplifies and AD converts the electrical signals to generate identifiable digital signals; the control module 12 sends instructions to the air pump 57, the circulating pump 67 and the valves 11 according to the difference between the preset parameters and the real-time signals, so as to realize closed-loop control of detection-judgment-execution; for example, when the temperature and pressure sensor 62 detects that the temperature in the mask is higher than 32℃, the control module 12 will start the circulating pump 67 and increase the opening degree of the circulating pipeline valve 11, so that the low-temperature medium in the circulating tank 66 flows through the gel layer 63 to reduce the local temperature through heat exchange until it returns to the preset range.

[0040] Working principle: before the temperature control assembly 6 is operated, it is connected with the mask body 1 through the above-mentioned pipelines, and when the mask is worn subsequently, the temperature and pressure sensor 62 in the installation hole 61 on the two sides monitors the key parameters in the mask in real time: on the one hand, it senses the temperature of the contact area with the face (including the local temperature formed by the respiratory humid heat gas and the skin metabolic heat), and on the other hand, it synchronously detects the air pressure in the mask (linked with the internal pressures of the air bag one 52 and the air bag two 53); the sensor transmits the collected temperature and pressure original signals to the signal receiving module 14 in the shell 9 through the lead line, to complete the preliminary conversion of the physical signals into electrical signals.

[0041] The signal receiving module 14 transmits the electrical signals to the signal processing module 13, which filters (eliminates interference such as respiratory airflow fluctuation), amplifies and digitizes the signals, generates accurate digital signals and transmits them to the control module 12. The control module 12 (core control unit) compares the real-time data with the comfort parameters (such as temperature 28-32℃ and pressure 2-5kPa) preset by the user through the control panel 10: if the temperature is higher than the upper limit, it is determined to be overheated; if it is lower than the lower limit, it is determined to be overcooled; if it deviates from the pressure range, the pressure adjustment instruction is triggered simultaneously.

[0042] When temperature adjustment is required, the control module 12 drives the circulating pump 67 to start, and adjusts the opening degree of the valve 11 on the circulating pipe one 64 and the circulating pipe two 65 (the electromagnetic proportional valve can accurately control the flow rate), at this time, the temperature control medium (special cooling liquid) in the circulating tank 66 in the shell 9 enters the circulating pump 67 through the pipeline, is pumped into the circulating pipe two 65, and then flows into the circulating pipe one 64 (S-shaped embedded in the inside of the gel layer 63) on the side of the face shield through the quick connector, and finally returns to the circulating tank 66 to form a closed circulation; the gel layer 63 (high-thermal-conductivity medical hydrophilic gel) serves as a heat exchange medium to transfer the temperature of the medium in the circulating pipe to the face contact area: the low-temperature medium can absorb the heat of the face to achieve cooling, and the high-temperature medium (if the circulating tank 66 is equipped with a heating function) can release heat to achieve heating, and the medium flow rate is adjusted (the opening degree of the valve 11 is controlled) to avoid discomfort caused by sudden temperature changes.

[0043] At the same time, the control module 12 will cooperatively adjust the valve 11 on the inflation pipe 56: if the temperature change causes the pressure in the air bag to deviate from the preset range (such as thermal expansion and cold contraction effect), the valve 11 controls the air pump 57 to supplement or discharge gas to ensure that the buffering and pressure reduction effects of the air bag one 52 and the air bag two 53 are stable. The control panel 10 displays the current temperature, pressure, medium flow rate and other parameters in real time, and the user can correct the preset value at any time through the keys to form a man-machine interactive adjustment.

[0044] When the temperature and pressure sensor 62 detects that the parameters return to the preset range, the control module 12 will reduce the power of the circulating pump 67 and the opening degree of the valve 11 (or pause the work), and then the control module 12 enters a low-power consumption monitoring state, and waits for the next signal trigger. The whole process is controlled through a closed loop with a millisecond-level response to achieve dynamic balance of temperature and pressure, solve the problems of local stuffiness, condensate accumulation or pressure discomfort caused by long-term wearing, and improve the wearing comfort and treatment tolerance.

[0045] Embodiment three: this embodiment is basically the same as the previous embodiment, the difference is that the temperature control related structure inside the shell 9 in the temperature control assembly 6 is cancelled, the gel layer 63 arranged outside the air bag one 52 and the air bag two 53 is retained, and a special external pressure regulation interface and an air cooling circulation device are additionally arranged, so that the external pressure equipment and the air cooling circulation device realize air bag pressure regulation and gel layer 63 refrigeration, and the specific structure and working principle are as follows:

[0046] Buffering and pressure reduction assembly optimization:

[0047] The adjustment assembly 5 retains the bottom plate 51, the air bag one 52, the air bag two 53 and the gas conveying pipe 54;

[0048] The air bag one 52 and the air bag two 53 are connected through 2-3 microchannels with a diameter of 1.2 mm to ensure the synchronization of air pressure;

[0049] The gas delivery tube 54 is upgraded to medical-grade PU material, and a medical standard quick connector is added at the end. The inside of the connector is embedded with a double-layer silicone rubber sealing ring. The plug-in and pull-out frequency is ≥500 times, and the air leakage rate is ≤0.1 mL / min. It can be directly connected to the external pressure equipment such as a breathing machine and a gas pressure controller.

[0050] A manual stop valve is installed in the middle of the gas delivery tube 54. The opening of the manual stop valve can be adjusted by a knob. It is used to temporarily shut off or adjust the gas flow to avoid pressure fluctuations when switching external equipment.

[0051] The gel layer 63 is made of temperature-sensitive material. After long-term close contact with the patient's skin, its color will change (e.g., from transparent to pink). This is a warning of rising temperature. At this time, the pressure of air bag one 52 and air bag two 53 is adjusted to reduce the pressure on the patient's nose and face, improve patient comfort, and use air cooling and circulating devices to cool the gel layer 63 to improve the comfort of wearing the mask body 1.

[0052] Pressure monitoring and adaptation structure:

[0053] A detection hole with a diameter of 6 mm is opened in the cheek area (close to the position of air bag two 53) of the mask body 1. A high-precision MEMS pressure sensor (detection range 0.5-10 kPa, accuracy ±0.1 kPa) is built-in. The sensor probe is attached to the inner wall of air bag two 53. The sensor probe is extended to the outside of the mask through a wire (built-in wire hole in the side wall of the mask body 1). It can be connected to the display screen or monitoring terminal of external equipment.

[0054] The shell 9 and internal air pump 57, and air exchange tube 55 of embodiment one are cancelled. Only a simple shell 9 (ABS material, volume reduced to 1 / 3 of embodiment one) is retained. The shell is only used to store the gas delivery tube 54, pressure sensor wire, and stop valve. Interface fixing buckles are added to the surface to prevent the connector from falling off due to external equipment pulling.

[0055] External equipment adaptation requirements:

[0056] The adapted external pressure equipment needs to meet the following parameter requirements: output pressure range 0.5-10 kPa, pressure regulation accuracy ±0.2 kPa, and flow regulation range 5-50 L / min.

[0057] It has a standard gas input interface (which can match the quick connector of the gas delivery tube 54) and supports real-time pressure feedback function (which can receive the signal of the pressure sensor of this embodiment).

[0058] The equipment has a pressure overload protection function (which automatically cuts off the gas when the air bag pressure exceeds 10 kPa), and forms a double safety protection with the stop valve of this embodiment.

[0059] Working principle:

[0060] Wearing and connecting:

[0061] Through the cooperation of the positioning pin 8 and the pin hole 7 to fix the bottom plate 51, the patient wears the mask body 1, adjusts the headband 4 to the mask preliminary fit the face (the air bag one 52 covers the cheek area, and the air bag two 53 is aligned with the nose bridge); the quick connector of the gas delivery pipe 54 is connected with the external pressure device (such as the pressure output end of the breathing machine), the USB interface of the pressure sensor is connected with the device monitoring screen, and the manual stop valve in the middle of the gas delivery pipe 54 is opened (the opening degree is adjusted to 50%).

[0062] Pressure regulation process:

[0063] The external pressure device is started, and the target pressure value (usually 2-6kPa) is set. The device inflates the air bag one 52 and the air bag two 53 through the gas delivery pipe 54, and the gas is uniformly distributed in the two air bags through the micro channel. The pressure sensor collects the pressure in the air bag in real time and transmits it to the device monitoring screen.

[0064] When the monitoring screen displays that the pressure reaches the target value, slowly close the manual stop valve (the opening degree is adjusted to 10% to 20%), and keep the pressure in the air bag stable. If the pressure needs to be adjusted, the output pressure of the external device is increased or decreased, and the opening degree of the stop valve is adjusted synchronously to avoid the pressure fluctuation exceeding ±0.3kPa.

[0065] During wearing, if the external device triggers the pressure overload protection (such as the pressure suddenly rises due to the patient's cough), the stop valve can be manually and quickly closed to prevent the air bag from over-expanding and pressing the face.

[0066] Pressure maintenance and disassembly:

[0067] During normal use, the pressure sensor refreshes the data every 5 seconds, and the external device dynamically compensates the pressure loss according to the feedback signal (the compensation accuracy is ±0.1kPa). When disassembling, first discharge 70% to 80% of the gas in the air bag through the external device, then open the manual stop valve to release the residual pressure, and finally remove the headband 4 and the mask body 1.

[0068] The above only describes certain exemplary embodiments of the present application in a descriptive manner, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above figures and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A double-layer buffer decompression ventilator mask, comprising a mask body (1) and a shell (9), characterized in that, The mask body (1) is provided with an adjustment component (5) and a temperature control component (6); The adjustment component (5) includes a base plate (51), on which airbag one (52) and airbag two (53) are installed. The airbag one (52) and airbag two (53) are kept in communication. An air supply pipe (54) is installed on airbag one (52). An air exchange pipe (55) is provided on the top of the housing (9). An inflation pipe (56) is installed on the top of one side of the housing (9). An air pump (57) is installed inside the housing (9). The temperature control component (6) includes mounting holes (61) on both sides, which are symmetrically opened at the bottom of the mask body (1). Temperature and pressure sensors (62) are installed inside the mounting holes (61) on both sides. The temperature control component (6) also includes a gel layer (63). A circulation tube (64) is symmetrically installed on one side of the gel layer (63), and a circulation tube (65) is symmetrically installed on the other side of the housing (9). A circulation box (66) is installed inside the housing (9), and a circulation pump (67) is provided below the circulation box (66).

2. The double-layer buffer decompression ventilator mask according to claim 1, characterized in that, The mask body (1) has mounting rings (2) symmetrically installed on its surface. A breathing tube (3) is installed on the mask body (1). Headbands (4) are installed on both sides of the mounting rings (2).

3. The double-layer buffer decompression ventilator mask according to claim 1, characterized in that, The mask body (1) has multiple pin holes (7), and the bottom plate (51) has multiple positioning pins (8). The number and position of the pin holes (7) and positioning pins (8) are all set accordingly.

4. The double-layer buffer decompression ventilator mask according to claim 1, characterized in that, A control panel (10) is mounted on the surface of the housing (9). A control module (12), a signal processing module (13), and a signal receiving module (14) are installed inside the housing (9). The control module (12), the signal processing module (13), and the signal receiving module (14) are all electrically connected.

5. A double-layer buffer decompression ventilator mask according to claim 1, characterized in that, Valves (11) are installed on the inflation pipe (56), the first circulation pipe (64) on both sides and the second circulation pipe (65).

6. A double-layer buffer decompression ventilator mask according to claim 1, characterized in that, The first airbag (52) is located in the cheek area of ​​the mask body (1), and the second airbag (53) is located in the bridge of the nose area of ​​the mask body (1).

7. A double-layer buffer decompression ventilator mask according to claim 1, characterized in that, The gel layer (63) is mounted on the base plate (51), and the first airbag (52) and the second airbag (53) are both located below the gel layer (63).

8. A double-layer buffer decompression ventilator mask according to claim 1, characterized in that, The ventilation pipe (55) and the inflation pipe (56) are both connected to the air pump (57), the second circulation pipe (65) is connected to the circulation pump (67), and the circulation pump (67) is connected to the circulation box (66) through a pipe.

Images