Portable positive pressure ventilator, calibration device and calibration method

Abstract

The present invention discloses a portable positive pressure ventilator, a calibration device and a calibration method. The main design concept of the present invention is to use a brushless DC blower as the core air supply component, facing the actual needs of users, assisted by electronically controlled pressure regulation technology to achieve the adjustment of different air supply pressures, and adopt flexible multi-point support means to reduce working noise. At the same time, the various components are reasonably arranged, especially the detachable component structure is adopted to make the overall structure easy to carry. The ventilator is manufactured by combining economical and easily available materials, which can solve the problem of shortage of ventilator equipment while meeting economic efficiency. Furthermore, the ventilator of the present invention is equipped with a multi-level solution for calibrating the blower voltage, so that the ventilator can have a multi-level adjustment function to adapt to different output air pressure requirements.

Description

Technical Field

[0001] The present invention relates to the field of ventilator equipment, and in particular to a portable positive pressure ventilator, a calibration device and a calibration method. Background Art

[0002] In clinical medicine, respiratory disorders caused by various diseases often threaten patients' lives. The ventilator is an important medical device that can improve respiratory disorders, prevent respiratory failure, and even save the lives of patients with lung diseases. It is an automated active air supply treatment method and plays an important role in medical first aid, lung obstruction, snoring, etc.

[0003] In the existing technology of ventilators, the following problems currently exist:

[0004] Most ventilators use a blower to pressurize air, which is then delivered through tubes to the patient's mouth or nose. These areas are sensitive, and if the air pressure or airflow exceeds a certain range, it will inevitably cause discomfort to the patient. Therefore, controlling the blower's air supply pressure and flow is the fundamental solution to this problem.

[0005] To this end, the fans in ventilators all use high-speed motors as drive elements. During operation, the noise caused by blade friction and structural vibration is usually loud, especially during rest at night. How to effectively reduce noise is an important issue that needs to be studied urgently. There are two ways to reduce noise in the existing technology: (1) thick vibration isolation materials are usually used to achieve noise reduction, but this easily leads to an increase in the size of the device and also increases the cost; (2) noise reduction by improving the air path structure, which requires high structural design technology.

[0006] Due to the above-mentioned combined factors, existing ventilators are large in size and weight, making them inconvenient to carry around. However, patients with chronic obstructive pulmonary disease and asthma may need ventilator assistance at any time when going out on a daily basis. Therefore, the present invention believes that reasonable design and improvement of the structure of the ventilator is the key idea to improve portability. Summary of the Invention

[0007] In view of the above, the present invention aims to provide a portable positive pressure ventilator, a calibration device and a calibration method to solve the above-mentioned technical problems.

[0008] The technical solution adopted in the present invention is as follows:

[0009] In a first aspect, the present invention provides a portable positive pressure ventilator, comprising: an air circuit system, a blower system and an electronic control system located in a housing body, wherein the electronic control system is used to control the blower system to provide an airflow with a predetermined pressure and output the airflow through the air circuit system;

[0010] The blower system includes a brushless DC blower, a flexible support plate, and a motor driver. The motor driver is used to drive the brushless DC blower to operate, and an air inlet is provided on one side of the brushless DC blower. The flexible support plate is installed on the other side of the brushless DC blower opposite to the air inlet, and the flexible support plate is used to connect and fix the brushless DC blower to the housing body.

[0011] The electric control system includes an air pressure control component, which is used to change the output voltage by adjusting a preset gear position to regulate the speed of the brushless DC blower through the motor driver;

[0012] The air circuit system includes an air outlet connector, a hose, a filter breathing nozzle, and an air inlet filter cotton; an air inlet grille is provided on the housing body at a position corresponding to the air inlet, and the air inlet filter cotton is installed on the air inlet grille; the air outlet connector is installed on the housing body, one end of which is connected to the air outlet of the brushless DC blower and the other end is connected to the air inlet end of the hose; the air outlet end of the hose is connected to the filter breathing nozzle;

[0013] Wherein, the hose and the filter breathing nozzle both have a detachable structure.

[0014] In at least one possible implementation, the air pressure control component includes: a band switch and a code disk disposed outside the housing body, and a circuit board disposed inside the housing body, wherein the circuit board is integrated with a plurality of resistors corresponding to the gear positions of the band switch;

[0015] The code disk is installed on the band switch and is provided with scale values corresponding to each gear position.

[0016] In at least one possible implementation manner, the flexible support plate is an annular sheet structure and is made of an elastic resin material.

[0017] In at least one possible implementation, the brushless DC blower is connected to the flexible support plate via a plurality of fixing bosses formed thereon, and the center of gravity of the brushless DC blower is located at a center position of the plurality of fixing bosses.

[0018] In at least one possible implementation, the electronic control system further includes a battery and a charging socket, and the battery is connected to the air pressure control component, the motor driver, and the charging socket respectively through wires.

[0019] In a second aspect, the present invention provides an air pressure calibration device, comprising: a DC power supply, an adapter, a transparent water tank, and a calibration tube;

[0020] The DC power supply is used to provide power to the motor driver and brushless DC blower of the ventilator;

[0021] The transparent water tank is used to hold test water exceeding a preset depth;

[0022] The calibration tube is placed in the transparent water tank and has scale lines preset along the axial direction, and the scale range corresponds to the preset depth;

[0023] The two ends of the adapter are respectively connected to the filter breathing mouthpiece of the respirator and the calibration tube.

[0024] In at least one possible implementation manner, the DC power supply is an adjustable voltage-regulated DC power supply.

[0025] In at least one possible implementation manner, the calibration tube is a transparent round tube.

[0026] In at least one possible implementation, the connection portion between the adapter, the filter breathing nozzle, and the calibration tube is airtight.

[0027] In a third aspect, the present invention provides a method for air pressure calibration, comprising:

[0028] Determining a range of water column heights corresponding to the ventilator output pressure based on clinical data, wherein the water column heights are obtained by driving a brushless DC blower with different voltage values;

[0029] The ventilator's air pressure control component is preset with multiple gears, and different gears correspond to different water column heights according to the geometric principle;

[0030] Insert the calibration tube vertically into the water in the transparent water tank, turn on the DC power supply to make the brushless DC blower blow air into the calibration tube;

[0031] Adjust the voltage value of the DC power supply so that the height difference between the inner and outer liquid levels of the calibration tube corresponds to the corresponding scale value on the calibration tube, and record the current output voltage and output power of the DC power supply;

[0032] Use Ohm's law to calculate and adjust the resistance combination for each gear of the ventilator's air pressure control component.

[0033] The main design concept of the present invention is to use a brushless DC blower as the core air supply component, facing the actual needs of users, assisted by electronically controlled pressure regulation technology to achieve the adjustment of different air supply pressures, and adopt flexible multi-point support means to reduce working noise. At the same time, the various components are reasonably arranged, especially the use of a detachable component structure to make the overall structure easy to carry. Combined with the optional economical and easily available materials to manufacture the ventilator, it can solve the problem of ventilator equipment shortage while meeting economic efficiency. Furthermore, the ventilator of the present invention also provides a multi-level calibration solution for the blower voltage, which can enable the ventilator to have a multi-level adjustment function to adapt to different output air pressure requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0035] Figure 1 A schematic diagram of the main body of a portable positive pressure breathing machine provided by an embodiment of the present invention;

[0036] Figure 2 A perspective view of the main body of a portable positive pressure ventilator according to an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of a blower system of a portable positive pressure ventilator provided in an embodiment of the present invention;

[0038] Figure 4 A rear view of a portable positive pressure breathing machine provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the connection between the air pressure calibration device provided by an embodiment of the present invention and a positive pressure breathing machine;

[0040] Figure 6 This is a flow chart of the air pressure calibration method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0042] The present invention provides an embodiment of a portable positive pressure breathing machine, specifically, as Figures 1 to 4As shown, it includes: an air circuit system, a blower system and an electronic control system located in the shell body 10, the electronic control system is used to control the blower system to provide an airflow with a predetermined air pressure, and output the airflow through the air circuit system, such as into the patient's mouth, thereby providing respiratory support for the patient.

[0043] The fan system is located in the upper part of the ventilator, and includes a brushless DC blower 1, a flexible support plate 2 and a motor driver 3. Specifically, the brushless DC blower 1 is fixed to the upper part of the shell body 10, and the motor driver 3 is fixed to the bottom of the brushless DC blower 1, which is used to drive the brushless DC blower 1 to operate, and an air inlet 1-1 is provided on the back of the brushless DC blower 1; the flexible support plate 2 is installed on the front of the brushless DC blower 1, and the flexible support plate 2 is used to connect and fix the brushless DC blower 1 to the shell body 10.

[0044] In actual operation, the brushless DC blower 1 can be connected to the flexible support plate 2 via multiple fixing bosses formed thereon, and the center of gravity of the brushless DC blower 1 is located at the center of the multiple fixing bosses. Specifically, three fixing bosses can be provided on the front of the brushless DC blower 1, each of which has a first mounting hole (not shown) at the center, and a second mounting hole 2-1 is provided at a corresponding position on the flexible support plate 2. In this way, three M2.5×8 self-tapping screws can be used to securely connect the flexible support plate 2 to the brushless DC blower 1. In addition, the flexible support plate 2 is provided with a plurality of third mounting holes 2-2 for securely connecting to the housing body 10.

[0045] As shown in the figure, the flexible support plate 2 preferably has an annular sheet structure and is made of elastic resin material, which can significantly reduce the vibration and noise generated by the high-speed rotation of the brushless DC blower.

[0046] The electronic control system includes an air pressure control component 4, which is used to change the output voltage by adjusting a preset gear position to control the speed of the brushless DC blower 1, thereby obtaining a specific air pressure that meets the usage requirements. Specifically, the air pressure control component 4 includes a band switch and a code disk 14 disposed on the outside of the housing body 10, and a circuit board disposed within the housing body 10. The circuit board is integrated with a plurality of resistors (forming a potentiometer) corresponding to the gear positions of the band switch; wherein the code disk 14 is mounted on the band switch and has a scale value corresponding to each gear position.

[0047] In actual operation, according to needs, you can choose but not be limited to a band switch with six gears. The value of the resistance can be determined after calibration based on the required power of the brushless DC blower, and then a number of corresponding resistors are soldered to the circuit board according to the calibrated resistance value and connected to the band switch. The specific calibration scheme of the six-gear air pressure control component will be schematically illustrated later, which will not be repeated here. It can be added here that during implementation, the circuit board can be fixed in the middle of the shell body and below the motor driver. The aforementioned band switch can adopt a knob mechanism, and the output voltage of the air pressure control component can be adjusted by rotating the switch. Corresponding to the knob form, the aforementioned code disk 14 can adopt a circular ring structure as shown in the figure, so that the user can adjust the knob to the corresponding scale according to the required air pressure.

[0048] In addition, the electronic control system also includes a battery 5 and a charging socket 12 (which can be installed on the back of the ventilator). The battery 5 preferably uses a 24V 3000mah rechargeable lithium battery. The battery 5 is connected to the air pressure control component, the motor driver and the charging socket 12 through wires.

[0049] Continuing from the previous section, the air circuit system includes an outlet connector 6, a flexible hose 7 (which can be made of silicone), a filter mouthpiece 8, and an air inlet filter. An air inlet grille 9 is located on the back of the housing 10, corresponding to the air inlet 1-1 of the brushless DC blower 1. The air inlet filter is installed on the air inlet grille 9. Together, these two elements significantly reduce noise generated by airflow and provide a primary filter for external air, benefiting the patient's health and extending the life of the ventilator.

[0050] The air outlet connector 6 is installed on the shell body 10, one end of which is connected to the air outlet 1-2 of the brushless DC blower 1, and the other end is connected to the air inlet end of the hose 7; the air outlet end of the hose 7 is connected to the filter breathing nozzle, wherein the hose can be provided with different length specifications, such as 45cm, 60cm and 90cm, which can be selected according to actual needs.

[0051] It can be pointed out that the hose 7 and the filter breathing mouthpiece 8 both have a detachable structure (the hose is detachable from the filter breathing mouthpiece and the respirator body respectively), which is suitable for carrying around to improve portability. In addition, when there is a shortage of respirators, users only need to connect their own hose and filter breathing mouthpiece to achieve sharing of this respirator.

[0052] Based on this, in order to achieve the aforementioned portability, in some embodiments of the present invention, the aforementioned components such as the battery, brushless DC blower, potentiometer, motor driver, etc. can be specifically selected and designed in layout. For example, the main body size of the ventilator is selected to be 165mm long × 77mm wide × 53mm thick, and the selection of each component ensures that the weight of the whole machine is within 650g, thereby greatly improving the portability effect.

[0053] Regarding the calibration of the ventilator output pressure control mentioned above, the present invention also provides a pressure calibration device for the aforementioned ventilator embodiment, such as Figure 5 As shown, it includes: a DC power supply 13-1, an adapter 13-2, a transparent water tank 13-3 and a calibration tube 13-4;

[0054] The DC power supply 13-1 is used to provide power to the motor driver and brushless DC blower of the ventilator, and preferably adopts an adjustable regulated DC power supply with a voltage adjustment range of 0-30V;

[0055] The transparent water tank 13-3 is used to hold test water (clean water) exceeding a preset depth (such as 12 cm);

[0056] The calibration tube 13-4 is placed in the transparent water tank 13-3 and has scale lines preset along the axial direction. The scale range corresponds to the preset depth (e.g., 0-12 cm). In addition, the calibration tube 13-4 is preferably a transparent round tube.

[0057] The two ends of the adapter 13 - 2 are respectively connected to the filter breathing nozzle of the ventilator and the calibration tube, and are airtight.

[0058] Based on the above calibration device, the present invention also provides a method for calibrating the air pressure of the above ventilator embodiment. Figure 6 Shown, including:

[0059] Step S1, determining a range of water column heights corresponding to a ventilator output pressure based on clinical data, wherein the water column heights are obtained by driving a brushless DC blower with different voltage values;

[0060] Step S2, presetting multiple gears of the air pressure control component of the ventilator, wherein different gears correspond to different water column heights according to the geometric principle;

[0061] If there are 6 gears in total: gear 0 is neutral with no voltage output, the voltage value corresponding to gear 1 can make the brushless DC blower produce 5 cm water column, and the highest gear 5 can produce 12 cm water column. Based on the principle of geometric proportion, the height of the water column that can be produced by gear 2, gear 3 and gear 4 can correspond to 6.2 cm, 7.7 cm and 9.6 cm respectively, which are rounded to 6 cm, 8 cm and 10 cm respectively.

[0062] Step S3: vertically insert the calibration tube into the water in the transparent water tank, and turn on the DC power supply to enable the brushless DC blower to blow air into the calibration tube;

[0063] It can be understood that there will be a certain height difference between the inner and outer liquid levels of the calibration tube, and the water pressure corresponding to this height difference is the current output air pressure of the brushless DC blower.

[0064] Step S4, adjusting the voltage value of the DC power supply so that the height difference between the inner and outer liquid levels of the calibration tube corresponds to the corresponding scale value on the calibration tube, and recording the current output voltage and output power of the DC power supply;

[0065] Step S5: Calculate and adjust the resistance combination of each gear of the air pressure control component of the ventilator using Ohm's law; wherein the resistance value of the resistance combination corresponds to the voltage value output after operating the band switch according to different scales on the code disk.

[0066] Based on the aforementioned calibration scheme, the working state of the ventilator example can be referred to as follows: the air pressure control component is pre-set to 6 gear working states, gear 0 is neutral, that is, no voltage output; gears 1 to 5 are calibrated to produce air pressures corresponding to 5 cm, 6 cm, 8 cm, 10 cm and 12 cm of water column on the calibration tube respectively; and correspond to the scales 0, 1, 2, 3, 4, and 5 of each gear on the code disk of the air pressure control component. In this way, by adjusting the gear of the air pressure control component to change the output voltage, the speed of the brushless DC blower is adjusted to obtain the air pressure that meets the patient's needs. Since children and adults have different symptoms or severity, different patients require different air pressures: for example, mild patients and children require an air pressure of 5-6 cm water column, moderate patients and larger patients require 8-10 cm water column, and severe patients require 12 cm water column. Therefore, according to the doctor's instructions or their own needs, the patient adjusts the knob of the air pressure control component to make the ventilator provide corresponding and appropriate air pressure.

[0067] In summary, the main design concept of the present invention is to use a brushless DC blower as the core air supply component, facing the actual needs of users, assisted by electronically controlled pressure regulation technology to achieve the adjustment of different air supply pressures, and adopt flexible multi-point support means to reduce working noise. At the same time, the various components are reasonably arranged, especially the detachable component structure is adopted to make the overall structure easy to carry. The ventilator is manufactured by combining economical and easily available materials, which can solve the problem of shortage of ventilator equipment while meeting economic efficiency. Furthermore, the ventilator of the present invention also provides a multi-level calibration solution for the blower voltage, which can enable the ventilator to have a multi-level adjustment function to adapt to different output air pressure requirements.

[0068] In the embodiment of the present invention, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c can be single or multiple.

[0069] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred modes can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A pressure calibration device for a portable positive pressure breathing machine, characterized in that: The portable positive pressure ventilator includes: an air circuit system, a fan system and an electronic control system located in a shell body, the electronic control system is used to control the fan system to provide an airflow with a predetermined air pressure, and output the airflow through the air circuit system; the fan system includes a brushless DC blower, a flexible support plate and a motor driver, the motor driver is used to drive the brushless DC blower to operate, and an air inlet is provided on one side of the brushless DC blower; the flexible support plate is installed on the other side of the brushless DC blower opposite to the air inlet, and the flexible support plate is used to connect and fix the brushless DC blower to the shell body; the electronic control system includes The air pressure control component is used to change the output voltage by adjusting a preset gear, so as to control the speed of the brushless DC blower through the motor driver; the air circuit system includes an air outlet connector, a hose, a filter breathing nozzle and an air inlet filter; an air intake grille is provided on the shell body at a position corresponding to the air inlet, and the air intake filter is installed on the air intake grille; the air outlet connector is installed on the shell body, one end of which is connected to the air outlet of the brushless DC blower and the other end is connected to the air inlet end of the hose; the air outlet end of the hose is connected to the filter breathing nozzle; wherein, the hose and the filter breathing nozzle both have a detachable structure; The air pressure control component includes: a band switch and a code disk provided outside the housing body, and a circuit board provided inside the housing body, wherein the circuit board is integrated with a plurality of resistors corresponding to the gear positions of the band switch; The air pressure calibration device includes: a DC power supply, an adapter, a transparent water tank and a calibration tube; The DC power supply is used to provide power to the motor driver and brushless DC blower of the ventilator; The transparent water tank is used to hold test water exceeding a preset depth; The calibration tube is placed in the transparent water tank and has scale lines preset along the axial direction, and the scale range corresponds to the preset depth; The two ends of the adapter are respectively connected to the filter breathing nozzle of the ventilator and the calibration tube; The air pressure calibration device is used to calibrate the resistance combination of each gear position of the air pressure control component.

2. The air pressure calibration device according to claim 1, characterized in that: The code disk is mounted on the band switch and is provided with scale values corresponding to each gear position.

3. The air pressure calibration device according to claim 1, characterized in that: The flexible support plate is an annular sheet structure and is made of elastic resin material.

4. The air pressure calibration device according to claim 1, characterized in that: The brushless DC blower is connected to the flexible support plate via a plurality of fixing bosses formed thereon, and the center of gravity of the brushless DC blower is located at the center of the plurality of fixing bosses.

5. The air pressure calibration device according to any one of claims 1 to 4, characterized in that: The electric control system further includes a battery and a charging socket, and the battery is connected to the air pressure control component, the motor driver and the charging socket respectively through wires.

6. The air pressure calibration device according to claim 1, characterized in that: The calibration tube is a transparent round tube.

7. The air pressure calibration device according to claim 6, characterized in that: The connection parts between the adapter, the filter breathing nozzle and the calibration tube are airtight.

8. A method for calibrating air pressure for the air pressure calibration device according to any one of claims 1 to 7, characterized in that: include: Determining a range of water column heights corresponding to the ventilator output pressure based on clinical data, wherein the water column heights are obtained by driving a brushless DC blower with different voltage values; The ventilator's air pressure control component is preset with multiple gears, and different gears correspond to different water column heights according to the geometric principle; Insert the calibration tube vertically into the water in the transparent water tank, turn on the DC power supply to make the brushless DC blower blow air into the calibration tube; Adjust the voltage value of the DC power supply so that the height difference between the inner and outer liquid levels of the calibration tube corresponds to the corresponding scale value on the calibration tube, and record the current output voltage and output power of the DC power supply; Use Ohm's law to calculate and adjust the resistance combination for each gear of the ventilator's air pressure control component.

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