High-precision diaphragm pump flow detection device

Abstract

The utility model provides a high-precision diaphragm pump flow detection device which is characterized by comprising a shell, a pneumatic electromagnetic valve, a diaphragm pump, an air cavity, a throttle valve, a flow velocity sensor, a carbon dioxide sensor module, a temperature sensor module and a humidity sensor module which are connected in sequence through hoses, after a patient blows air into an air bag, an operator starts sampling, and the air bag is filled with air. At the moment, the diaphragm pump is started, the pneumatic electromagnetic valve is opened, and air in the air bag enters the equipment host; by controlling the rotating speed of a motor of the diaphragm pump, airflow in the sampling process is kept at a stable value, and sampling is automatically stopped according to set time; the storage device is used for recording and tracking, and the flow stabilizing device and the flow sensor are arranged, so that the sampling quality is high; the air bag is externally connected for collecting air during use, so that the waiting time of a patient is short.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a high-precision diaphragm pump flow detection device. Background Art

[0002] Using exhaled breath to diagnose diseases has the advantages of being quick, convenient, non-invasive, and requiring low professional knowledge from operators. It is already the preferred method for detecting diseases such as tuberculosis and Helicobacter pylori. In the detection of cancer or other diseases, breath testing is also undergoing large-scale clinical trials.

[0003] The difficulty of operation, quality stability, patient waiting time, etc. of the breath testing process directly affect the effect, quality and cost of the breath sampling process.

[0004] Currently, breath sampling is mainly passive sampling, which requires the patient to exhale. Driven by the pressure generated by the exhalation, the gas enters the equipment. The quality of the gas samples collected in this way is greatly affected by the patient's compliance. If the patient does not cooperate or communication with the patient is inconvenient, it will lead to sampling difficulties and poor sampling quality. Utility Model Content

[0005] The purpose of the utility model is to propose a high-precision diaphragm pump flow detection device to solve the problem that current exhaled breath sampling is mainly passive sampling, which requires the patient to exhale, and the gas enters the equipment under the drive of the pressure formed by the exhaled breath. The quality of the gas sample collected in this way is greatly affected by the patient's compliance. If the patient does not cooperate or the patient is inconvenient to communicate, it will lead to sampling difficulties and poor sampling quality.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-precision diaphragm pump flow detection device comprises a housing 3, a pneumatic solenoid valve 31, a diaphragm pump 32, an air cavity 33, a throttle valve 34, a flow rate sensor 35 and a carbon dioxide, temperature and humidity sensor module 36, wherein the carbon dioxide, temperature and humidity sensor module 36 integrates a carbon dioxide sensor, a thermometer and a hygrometer; and the components are connected in sequence by hoses and distributed in the housing 3; an air bag 1 is connected to one side of the housing 3 through two adsorption tubes 2, and after the patient blows the air bag 1 full of gas, the gas is temporarily stored, and the operator starts sampling through the button on the equipment panel, at which time the diaphragm pump 32 is started, the pneumatic solenoid valve 31 is in an open state, and the gas temporarily stored in the air bag 1 enters the flow rate sensor 35 through the adsorption tube 2, the pneumatic solenoid valve 31, the diaphragm pump 32, the air cavity 33 and the throttle valve 34; during the whole process, the gas is actively sampled by controlling the speed of the motor in the diaphragm pump 32, so that the airflow during the sampling process is maintained at a stable value, and the sampling is automatically stopped according to the set time.

[0008] The shell 3 is also provided with a display screen 39 and five buttons 310. The display screen 39 mainly displays the flow rate, carbon dioxide concentration, temperature and humidity collected by the flow rate sensor 35 and the carbon dioxide, temperature and humidity sensor module 36, and can also display the time of the sampling process; the five buttons 310 respectively control the cursor forward movement, cursor backward movement, numerical value increase, numerical value decrease and confirmation.

[0009] The shell 3 is provided with two openings, namely a first inlet end 301 and a second inlet end 302. The first inlet end 301 and the second inlet end 302 are connected to the air bag 1 through the adsorption tube 2 on one side close to the outside of the shell 3. The first inlet end 301 and the second inlet end 302 are connected to the pneumatic solenoid valve 31 through a hose. The other end of the pneumatic solenoid valve 31 is connected to the inlet end of the diaphragm pump 32. The outlet end of the diaphragm pump 32 is connected to the air cavity 33. The end of the air cavity 33 away from the diaphragm pump 32 is connected to a throttle valve 34. The outlet end of the throttle valve 34 is connected to the flow rate sensor 35 and the carbon dioxide, temperature, and humidity sensor module 36 in sequence through a hose, and finally discharged from the end of the carbon dioxide, temperature, and humidity sensor module 36.

[0010] The first inlet end 301 and the second inlet end 302 are both cylindrical and have stepped holes inside, wherein the hole at one end close to the outside of the shell 3 has a larger diameter, and the hole at one end close to the inside of the shell 3 has a smaller diameter, and a hose can be used to connect and seal the first inlet end 301 and the second inlet end 302 at one end close to the inside of the shell 3.

[0011] A diaphragm pump motor 321 is fixedly installed next to the diaphragm pump 32 to provide kinetic energy for the diaphragm pump 32 .

[0012] A rounded rectangular support plate 4 is provided below the pneumatic solenoid valve 31, and support plate pillars 41 are provided at the four corners of the support plate 4, threads are provided on the support plate pillars 41, and threaded holes are provided at the corresponding positions of the support plate pillars 41 on the support plate 4, and the support plate 4 and the support plate pillars 41 are fixedly connected by screws, and a battery box 42 is provided below the support plate 4 in the middle of the support plate pillars 41, and batteries can be installed in the battery box 42 to power various components of the equipment.

[0013] A small circuit board 51 is installed next to the pneumatic solenoid valve 31, and the pneumatic solenoid valve 31 is connected to and controlled by the small circuit board 51. The small circuit board 51 is also connected to a large circuit board 52. The large circuit board 52 is installed at the bottom of the shell 3, below the components, and one end of the large circuit board 52 is provided with a switch module 53 and a power supply interface 54 near the rear edge of the shell 3 and extends directly to the outside of the shell 3.

[0014] The small circuit board 51 and the large circuit board 52 are respectively provided with multiple control modules and resistor auxiliary components to realize the control of the diaphragm pump motor 321, the pneumatic solenoid valve 31, the flow rate sensor 35, the carbon dioxide, temperature, humidity sensor module 36, the display screen 39 and the button 310.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model provides a high-precision diaphragm pump flow detection device; the device is used by connecting an air bag externally, and the air bag is used as a storage medium; the gas in the air bag is actively extracted for sampling after the diaphragm pump is started, and the device controls the rotation speed of the diaphragm pump motor to keep the airflow at a stable value during the sampling process, and automatically stops sampling at a set time; a throttle valve and an air cavity are provided in the high-precision diaphragm pump flow detection device to make the flow more stable, and a flow rate sensor is responsible for monitoring the flow rate to ensure the sampling quality; the air bag is used to collect gas to reduce the waiting time of patients, and the active sampling method can avoid the poor compliance of patients affecting the sampling quality, and can also reduce the communication time between medical staff and patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model after the external air bag and adsorption tube are connected;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model after the internal support plate is lifted;

[0020] Figure 4 This is a schematic diagram of the back structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the principle structure of the utility model;

[0022] Figure 6 This is the circuit diagram of the charging and switching part of the utility model;

[0023] Figure 7 This is a partial circuit diagram of the main control chip of the utility model;

[0024] Figure 8 This is the circuit diagram of the button and screen interface of the utility model;

[0025] Fig. 9 This is the circuit diagram of the 3.3V voltage stabilization output part of the utility model;

[0026] Fig.10 This is the motor control circuit diagram of the utility model;

[0027] Fig.11 This is the control circuit diagram of the pneumatic solenoid valve of the utility model;

[0028] Fig.12 This is a level conversion circuit diagram used in the utility model;

[0029] Fig.13 This is the circuit diagram of the flow velocity sensor of the utility model

[0030] Fig.14 This is the circuit diagram of the carbon dioxide, temperature and humidity sensor module of the utility model;

[0031] In the figure: 1-air bag; 11-air nozzle; 2-adsorption tube; 3-shell; 31-pneumatic solenoid valve; 32-diaphragm pump; 33-air cavity; 34-throttle valve; 35-flow rate sensor; 36-carbon dioxide, temperature, humidity sensor module; 39-display screen; 310-button; 301-first inlet port; 302-second inlet port; 321-diaphragm pump motor; 4-support plate; 41-support plate support; 42-battery box; 51-small circuit board; 52-large circuit board; 53-switch module; 54-power supply interface. DETAILED DESCRIPTION

[0032] In order to clarify the technical problems, technical solutions, implementation processes and performance demonstrations, the utility model is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are for explanation only. The utility model is not intended to limit the utility model. Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same figure numbers in the drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0033] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0034] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0035] Example 1

[0036] like Figure 1-Figure 5 As shown, a high-precision diaphragm pump flow detection device includes a housing 3, a pneumatic solenoid valve 31, a diaphragm pump 32, an air cavity 33, a throttle valve 34, a flow rate sensor 35 and a carbon dioxide, temperature, and humidity sensor module 36, wherein the carbon dioxide, temperature, and humidity sensor module 36 integrates a carbon dioxide sensor, a thermometer, and a hygrometer; and the various components are connected in sequence by hoses and distributed in the housing 3; an air bag 1 is connected to one side of the housing 3 through two adsorption tubes 2, and after the patient blows the air bag 1 full of gas, the gas is temporarily stored, and the operator starts sampling through the button on the equipment panel, at which time the diaphragm pump 32 is started, the pneumatic solenoid valve 31 is in an open state, and the gas temporarily stored in the air bag 1 enters the flow rate sensor 35 through the adsorption tube 2, the pneumatic solenoid valve 31, the diaphragm pump 32, the air cavity 33 and the throttle valve 34; during the whole process, the gas is actively sampled by controlling the speed of the motor in the diaphragm pump 32, so that the airflow during the sampling process is maintained at a stable value, and the sampling is automatically stopped according to the set time.

[0037] As a possible implementation, the deployment and use of the components in the device host 3 needs to be controlled by a main control chip, which can be a microcontroller of model ATMEGA328PB-AU. The specific circuit used is as follows: Figure 7 As shown; the level conversion circuit used in the device can be as follows Fig.12 Circuit arrangement shown.

[0038] A display screen 39 and five buttons 310 are also provided on the outer shell of the device host 3. The display screen 39 mainly displays the flow rate, carbon dioxide concentration, temperature and humidity collected by the flow rate sensor 35 and the carbon dioxide, temperature and humidity sensor module 36, and can also display the time of the sampling process; the five buttons 310 respectively control the cursor forward movement, cursor backward movement, value increase, value decrease and confirmation.

[0039] As a possible implementation, the interface between the button 310 and the display screen 39 adopts the following Figure 8 Circuit diagram shown.

[0040] The air bag 1 is provided with an air nozzle 11 , and the patient blows air into the air bag 1 through the air nozzle 11 .

[0041] The shell 3 is provided with two openings, namely a first inlet end 301 and a second inlet end 302. The first inlet end 301 and the second inlet end 302 are connected to the air bag 1 through the adsorption tube 2 on one side close to the outside of the shell 3. The first inlet end 301 and the second inlet end 302 are connected to the pneumatic solenoid valve 31 through a hose. The other end of the pneumatic solenoid valve 31 is connected to the inlet end of the diaphragm pump 32. The outlet end of the diaphragm pump 32 is connected to the air cavity 33. The end of the air cavity 33 away from the diaphragm pump 32 is connected to a throttle valve 34. The outlet end of the throttle valve 34 is connected to the flow rate sensor 35 and the carbon dioxide, temperature, and humidity sensor module 36 in sequence through a hose, and finally discharged from the end of the carbon dioxide, temperature, and humidity sensor module 36.

[0042] The first inlet end 301 and the second inlet end 302 are both cylindrical and have stepped holes inside, wherein the hole at one end close to the outside of the shell 3 has a larger diameter, and the hole at one end close to the inside of the shell 3 has a smaller diameter, and a hose can be used to connect and seal the first inlet end 301 and the second inlet end 302 at one end close to the inside of the shell 3.

[0043] As a possible implementation, a diaphragm pump motor 321 is fixedly installed next to the diaphragm pump 32 to provide kinetic energy for the diaphragm pump 32 .

[0044] As a possible implementation, a rounded rectangular support plate 4 is provided below the pneumatic solenoid valve 31, and support plate pillars 41 are provided at the four corners of the support plate 4, threads are provided on the support plate pillars 41, and the support plate 4 is provided with threaded holes at corresponding positions of the support plate pillars 41, the support plate 4 and the support plate pillars 41 are fixedly connected by screws, and a battery box 42 is provided below the support plate 4 in the middle of the support plate pillars 41, and batteries can be installed in the battery box 42 to power various components of the equipment.

[0045] As a possible implementation, a small circuit board 51 is installed next to the pneumatic solenoid valve 31, and the pneumatic solenoid valve 31 is connected to and controlled by the small circuit board 51. The small circuit board 51 is also connected to a large circuit board 52. The large circuit board 52 is installed at the bottom of the shell 3, below the components, and at one end, a switch module 53 and a power supply interface 54 are provided near the rear edge of the shell 3 and extend directly to the outside of the shell 3.

[0046] As a possible implementation, the charging and switching parts used therein can be implemented as follows: Figure 6 The circuit shown in the figure uses a linear voltage regulator of model mic5225-3.3ym5-tr for voltage regulation output. The voltage regulation output circuit used is as follows Fig. 9 shown.

[0047] The small circuit board 51 and the large circuit board 52 are respectively provided with a plurality of control modules and resistor auxiliary components to realize the control of the diaphragm pump motor 321, the pneumatic solenoid valve 31, the flow rate sensor 35, the carbon dioxide sensor 36, the thermometer 37, the display screen 39 and the button 310.

[0048] As a possible implementation, the motor control circuit used by the diaphragm pump motor 321 is as follows: Fig.10 The pneumatic solenoid valve control circuit used by the pneumatic solenoid valve 31 is as shown Fig.11 As shown; the flow rate sensor 35 adopts Fig.13 The circuit is connected as shown, and the carbon dioxide, temperature, humidity sensor module 36 and the thermometer 37 are connected as shown. Fig.14 Circuit connections shown.

[0049] During specific use, after the patient fills the air bag 1 with gas, the operator starts sampling through the five buttons 310 on the housing 3 of the high-precision diaphragm pump flow detection device. At this time, the diaphragm pump 32 is started, the pneumatic solenoid valve 31 is in an open state, and the gas in the air bag 1 passes through the adsorption tube 2, the pneumatic solenoid valve 31, the diaphragm pump 32, the air cavity 33, and the throttle valve 34 to enter the flow rate sensor 35; the device controls the speed of the diaphragm pump 32 motor to keep the airflow at a stable value during the sampling process, and automatically stops sampling according to the set time. This ensures the reliability and stability of the adsorption of the target gas on the adsorption tube 2.

[0050] When using the high-precision diaphragm pump flow detection device of this scheme for sampling, the use steps are as follows:

[0051] S1. The staff turns on the power switch of the high-precision diaphragm pump flow detection device;

[0052] S2. The staff checks whether the air bag 1, the adsorption tube 2 and the high-precision diaphragm pump flow detection device display normal;

[0053] S3, the staff starts to clean the air in the pipeline;

[0054] S4. The staff sets the sampling parameters of the high-precision diaphragm pump flow detection device;

[0055] S5, the staff installs the adsorption tube 2 and the air bag 1;

[0056] S6, the patient to be tested blows air into the air bag 1 until the air bag 1 is filled and the blowing port is covered before leaving, the process takes about 30 seconds;

[0057] S7, the staff operates the high-precision diaphragm pump flow detection device to suck the gas in the air bag 1 until the air bag 1 is almost completely evacuated;

[0058] S8. Remove the air bag 1 and the adsorption tube 2.

[0059] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision diaphragm pump flow detection device, characterized in that: The invention comprises a housing (3), a pneumatic solenoid valve (31), a diaphragm pump (32), an air cavity (33), a throttle valve (34), a flow rate sensor (35) and a carbon dioxide, temperature and humidity sensor module (36), wherein the carbon dioxide, temperature and humidity sensor module (36) integrates a carbon dioxide sensor, a thermometer and a hygrometer; and the components are sequentially connected by hoses and distributed in the housing (3); an air bag (1) is connected to one side of the housing (3) via two adsorption tubes (2); and the housing (3) is provided with two openings, namely a first inlet end (301) and a second inlet end (302), and the first inlet end (301) and the second inlet end (302) are close to the housing ( 3) one side of the outside is connected to the air bag (1) through the adsorption tube (2), the first inlet end (301) and the second inlet end (302) are connected to the pneumatic solenoid valve (31) through a hose, the other end of the pneumatic solenoid valve (31) is connected to the inlet end of the diaphragm pump (32), the outlet end of the diaphragm pump (32) is connected to the air cavity (33), the end of the air cavity (33) away from the diaphragm pump (32) is connected to a throttle valve (34), the outlet end of the throttle valve (34) is connected to the flow rate sensor (35) and the carbon dioxide, temperature, and humidity sensor module (36) in sequence through a hose, and finally discharged from the end of the carbon dioxide, temperature, and humidity sensor module (36).

2. A high-precision diaphragm pump flow detection device according to claim 1, characterized in that: The housing (3) is also provided with a display screen (39) and five buttons (310); the display screen (39) mainly displays the flow rate, carbon dioxide concentration, temperature and humidity collected by the flow rate sensor (35) and the carbon dioxide, temperature and humidity sensor module (36), and can also display the time of the sampling process; the five buttons (310) respectively control cursor forward movement, cursor backward movement, value increase, value decrease and confirmation.

3. A high-precision diaphragm pump flow detection device according to claim 1, characterized in that: The first inlet end (301) and the second inlet end (302) are both cylindrical and have stepped holes inside, wherein the hole at one end close to the outside of the shell (3) has a larger diameter, and the hole at one end close to the inside of the shell (3) has a smaller diameter, so that the first inlet end (301) and the second inlet end (302) close to the inside of the shell (3) can be connected and sealed via a hose.

4. A high-precision diaphragm pump flow detection device according to claim 1, characterized in that: A diaphragm pump motor (321) is fixedly mounted next to the diaphragm pump (32) to provide kinetic energy for the diaphragm pump (32).

5. A high-precision diaphragm pump flow detection device according to claim 1, characterized in that: A rounded rectangular support plate (4) is provided below the pneumatic solenoid valve (31), and support plate pillars (41) are provided at four corners of the support plate (4), threads are provided on the support plate pillars (41), threaded holes are provided on the support plate (4) at corresponding positions of the support plate pillars (41), the support plate (4) and the support plate pillars (41) are fixedly connected by screws, and a battery box (42) is provided below the support plate (4) and in the middle of the support plate pillars (41), and batteries can be installed in the battery box (42) to supply energy to various components of the device.

6. A high-precision diaphragm pump flow detection device according to claim 1, characterized in that: A small circuit board (51) is installed next to the pneumatic solenoid valve (31), and the pneumatic solenoid valve (31) is connected to and controlled by the small circuit board (51). The small circuit board (51) is also connected to a large circuit board (52). The large circuit board (52) is installed at the bottom of the shell (3) and is located below the components. A switch module (53) and a power supply interface (54) are provided at one end of the large circuit board, close to the rear edge of the shell (3), and directly extend to the outside of the shell (3).

7. A high-precision diaphragm pump flow detection device according to claim 6, characterized in that: The small circuit board (51) and the large circuit board (52) are respectively provided with a plurality of control modules and resistor auxiliary components to realize control of the diaphragm pump motor (321), the pneumatic solenoid valve (31), the flow rate sensor (35), the carbon dioxide, temperature, and humidity sensor module (36), the display screen (39), and the button (310).

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