CN114432916A - Gas mixing equipment - Google Patents
Gas mixing equipment Download PDFInfo
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- CN114432916A CN114432916A CN202111646626.6A CN202111646626A CN114432916A CN 114432916 A CN114432916 A CN 114432916A CN 202111646626 A CN202111646626 A CN 202111646626A CN 114432916 A CN114432916 A CN 114432916A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 25
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 abstract description 85
- 239000001301 oxygen Substances 0.000 abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 19
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 208000004756 Respiratory Insufficiency Diseases 0.000 description 1
- 230000003444 anaesthetic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 201000004193 respiratory failure Diseases 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The application provides a gas mixing apparatus, includes: the gas circuit module comprises a mixing part and an adjusting part arranged on the mixing part; the mixing part comprises a first cavity, a second cavity and a mixing cavity; the control module is connected with the gas circuit module; the adjusting part is used for adjusting the mixing proportion of the gas which flows from the first cavity and the second cavity to the mixing cavity according to the control of the control module. In this application, utilize differential pressure sensor to be the key part of guaranteeing the real-time feedback control signal of proportional valve and gather, integrate gaseous throttling arrangement to first cavity and second cavity in, utilize differential pressure sensor to detect the pressure differential at air-resistor both ends and realize the flow measurement in first cavity and the second cavity, have the characteristics that measuring sensitivity is high and the reliability is high. The control module controls the opening and closing degree of the first regulating part and the second regulating part according to the pressure difference detected by the pressure difference sensor so as to accurately adjust the mixing proportion of air and oxygen, namely, closed-loop control is formed, and therefore the mixing precision requirement of mixed gas is guaranteed.
Description
Technical Field
The application relates to the technical field of gas mixing, in particular to gas mixing equipment.
Background
The gas mixing device comprises an air-oxygen mixer, which plays an important role in the field of modern clinical medicine and can be used in applications such as respiratory failure, anesthetic breathing management, respiratory support treatment, emergency resuscitation and the like caused by various reasons. In the explosive infectious disease epidemic situation, the challenge of the medical system of the human society is continuously higher, and in a new situation, people are aware of the harmfulness of respiratory diseases, and the establishment and the improvement of a related medical system are rapidly promoted, so that higher requirements are provided for emergency treatment and life support equipment such as an air-oxygen mixer and the like.
At present, the used air oxygen mixer of clinical is not good to the monitoring of oxygen suppliment concentration, and the reliability is poor, and lacks the accurate control to mist, and the security is relatively poor when leading to equipment to use, can not satisfy clinical treatment's use needs, influences user's use and experiences.
Therefore, how to solve the above problems is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
It is an object of embodiments of the present application to provide a gas mixing apparatus that addresses at least the above-mentioned problems.
A first aspect of embodiments of the present application provides a gas mixing apparatus comprising: the gas circuit module comprises a mixing part and an adjusting part arranged on the mixing part; the mixing part comprises a first cavity, a second cavity and a mixing cavity;
the control module is connected with the gas circuit module;
the adjusting part is used for adjusting the mixing proportion of the gas communicated to the mixing cavity from the first cavity and the second cavity according to the control of the control module.
In some embodiments, the adjusting part includes a first adjusting unit and a second adjusting unit, the first adjusting unit is connected with the first cavity, and the second adjusting unit is connected with the second cavity;
the first adjusting unit is used for adjusting the air inflow communicated from the first cavity to the mixing cavity according to the control of the control module; the second adjusting unit is used for adjusting the air inflow communicated to the mixing cavity from the second cavity according to the control of the control module.
In some embodiments, the first regulating unit includes a first regulating member and a first differential pressure detecting portion for detecting a differential pressure within the first cavity;
the control module controls the first adjusting piece according to the pressure difference detected by the first pressure difference detecting part so as to adjust the air inflow communicated to the mixing cavity from the first cavity.
In some embodiments, the first differential pressure detecting section includes a first gas throttling device and a first differential pressure detecting member; the first gas throttling device is arranged in the first cavity; the first pressure difference detection piece is connected with the control module, and the first pressure difference detection piece is arranged in the first cavity and used for detecting the pressure difference between the two ends of the first gas throttling device.
In some embodiments, the second regulation unit includes a second regulation member and a second differential pressure detection portion for detecting a differential pressure within the second chamber;
the control module controls the second adjusting piece according to the pressure difference detected by the second pressure difference detecting part so as to adjust the air inflow communicated to the mixing cavity from the second cavity.
In some embodiments, the second differential pressure detecting section includes a second gas throttling device and a second differential pressure detecting member; the second gas throttling device is arranged in the second cavity; the second pressure difference detection piece is connected with the control module, and the second pressure difference detection piece is arranged in the second cavity and used for detecting the pressure difference at two ends of the second gas throttling device.
In some embodiments, further comprising: and the calibration mechanism is arranged in the mixing part and used for calibrating the first differential pressure detection piece and the second differential pressure detection piece.
In some embodiments, the first and second regulators are proportional valves.
In some embodiments, the first gas restriction and the second gas restriction are air locks.
In some embodiments, the first differential pressure detecting member and the second differential pressure detecting member are differential pressure sensors.
The above technical scheme of the differential pressure sensor has the following beneficial technical effects:
in this application, utilize differential pressure sensor to be the key part of guaranteeing the real-time feedback control signal of proportional valve and gathering, for reducing gas mixing equipment overall dimension, no longer adopt traditional flow measurement sensor, but with the gas throttling arrangement integration to first cavity and second cavity in, utilize differential pressure sensor to detect the pressure differential at air-resistor both ends and realize the flow measurement in first cavity and the second cavity, have the characteristics that measuring sensitivity is high and dependable nature is high. Furthermore, the control module controls different opening and closing degrees of the first adjusting piece and the second adjusting piece according to the pressure difference detected by the pressure difference sensor so as to accurately adjust the mixing proportion of air and oxygen, namely, closed-loop control is formed, and the mixing precision requirement of mixed gas is ensured. Furthermore, in order to ensure that the small flow detection precision of the differential pressure sensor can meet the actual application requirement, a zero calibration mechanism is adopted to weaken the zero drift problem caused by long-time use of the sensor.
Drawings
FIG. 1 is a block diagram of a gas mixing apparatus according to an embodiment of the present application;
fig. 2 is a block diagram of a gas circuit module according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a gas mixing apparatus provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a gas mixing apparatus provided in an embodiment of the present application;
FIG. 5 is a sectional view of a gas mixing apparatus according to an embodiment of the present application;
FIG. 6 is a cross-sectional view of a gas mixing apparatus according to an embodiment of the present application;
fig. 7 is a block diagram of a gas mixing apparatus according to another embodiment of the present application.
Reference numerals:
1. a gas circuit module; 2. a control module; 1a, a first cavity; 1b, a second cavity; 1c, a mixing cavity; 2a, a first air circuit control plate; 2b, a second air path control plate; 11. a first adjusting unit; 12. a second adjusting unit; 111. a first adjustment member; 112. a first differential pressure detecting section; 1121. a first gas throttling device; 1122. a first differential pressure detecting member; 121. a second adjustment member; 122. a second differential pressure detecting section; 1221. a second gas throttling device; 1222. a second differential pressure detecting member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings in conjunction with the detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The structure schematic diagram according to the embodiment of the application is shown in the attached drawings. The figures are not drawn to scale, wherein certain details may be omitted for clarity. The various regions, shapes, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions having different shapes, sizes, relative positions, according to actual needs.
It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
The present application will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
In an embodiment of the present application, referring to fig. 1-6, a gas mixing apparatus is provided that includes a gas circuit module 1 and a control module 2. The gas circuit module 1 comprises a mixing part and an adjusting part arranged on the mixing part, wherein the mixing part comprises a first cavity 1a, a second cavity 1b and a mixing cavity 1 c. The control module 2 is connected with the gas circuit module 1; the adjusting part is used for adjusting the mixing proportion of the gas which is circulated to the mixing cavity 1c from the first cavity 1a and the second cavity 1b according to the control of the control module 2.
The mixing part comprises a first cavity 1a, a second cavity 1b and a mixing cavity 1 c; wherein, the gas outlets of the first cavity 1a and the second cavity 1b are communicated with the mixing cavity 1c to realize the integral connection of the first cavity 1a, the second cavity 1b and the mixing cavity 1 c.
In this application embodiment, connect gas mixing equipment's first cavity 1a, second cavity 1b and mixed cavity 1c integral type, can realize gas mixing equipment's lightweight and miniaturized design, improve product space utilization.
In one embodiment, the first chamber 1a is used for conducting oxygen, and the second chamber 1b is used for conducting air; it is understood that in other embodiments, the second chamber 1b is used for conducting oxygen and the first chamber 1a is used for conducting air, i.e. the first chamber 1a and the second chamber 1b can be set to conduct gas as required.
Further, oxygen and air are both provided by a high pressure air source, the first cavity 1a and the second cavity 1b are both provided with an air inlet for communicating with a high pressure source, and the oxygen and the air provided by the high pressure air source enter the inside of the first cavity 1a and the second cavity 1b through two air inlets of the gas mixing device (the air inlet of the first cavity 1a and the air inlet of the second cavity 1 b), respectively.
Further, the input gas pressure of the first chamber 1a and the second chamber 1b ranges from 270kPa to 600 kPa.
In some embodiments, the adjusting part includes a first adjusting unit 11 and a second adjusting unit 12, the first adjusting unit 11 is connected with the first cavity 1a, and the second adjusting unit 12 is connected with the second cavity 1 b; the first adjusting unit 11 is used for adjusting the air inflow communicated from the first cavity 1a to the mixing cavity 1c according to the control of the control module 2; the second adjusting unit 12 is used for adjusting the air intake amount flowing from the second cavity 1b to the mixing cavity 1c according to the control of the control module 2.
In some embodiments, the first adjusting unit 11 includes a first adjusting member 111 and a first differential pressure detecting portion 112, the first differential pressure detecting portion 112 is used for detecting the differential pressure in the first chamber 1a, and the control module 2 controls the first adjusting member 111 according to the differential pressure detected by the first differential pressure detecting portion 112 to adjust the amount of intake air flowing from the first chamber 1a to the mixing chamber 1 c.
In some embodiments, the first differential pressure detecting portion 112 includes a first gas throttling device 1121 and a first differential pressure detecting element 1122. The first gas throttling device 1121 is disposed in the first cavity 1 a; the first pressure difference detecting element 1122 is connected to the control module 2, and the first pressure difference detecting element 1122 is disposed in the first cavity 1a and configured to detect a pressure difference between two ends of the first gas throttling device 1121. The control module 2 is configured to control the first adjusting element 111 according to the pressure difference detected by the first pressure difference detecting element 1122, so as to adjust an amount of intake air flowing from the first chamber 1a to the mixing chamber 1 c.
In one embodiment, the first adjustment member 111 is a proportional valve, in particular an electromagnetic proportional valve. The first gas throttling device 1121 is an air resistor, and the first differential pressure detecting element 1122 is a differential pressure sensor. Specifically, referring to fig. 5, the first adjusting part 111 is disposed in the first cavity 1a, and the first gas throttling device 1121 is disposed in the first cavity 1a and disposed between the gas outlet end of the first cavity 1a and the first adjusting part 111. The differential pressure sensor detects the pressure difference between the front end and the rear end of the air resistance. Further, the control module 2 detects the difference of the pressure difference at the two ends of the air resistor according to the pressure difference sensor to adaptively adjust the opening and closing degree of the proportional valve, so as to adaptively adjust the gas flow in the first cavity 1 a.
In this application, utilize differential pressure sensor to be the key part of guaranteeing the real-time feedback control signal of proportional valve and gathering, for reducing gas mixing equipment overall dimension, no longer adopt traditional flow measurement sensor, but with gas throttling arrangement integrated to first cavity 1a and second cavity 1b, utilize differential pressure sensor to detect the pressure differential at air resistance both ends and realize the flow measurement in first cavity 1a and the second cavity 1 b.
In some embodiments, the second adjusting unit 12 includes a second adjusting member 121 and a second differential pressure detecting portion 122, the second differential pressure detecting portion 122 is used for detecting the differential pressure in the second cavity 1b, and the control module 2 controls the second adjusting member 121 according to the differential pressure detected by the second differential pressure detecting portion 122 to adjust the amount of intake air flowing from the second cavity 1b to the mixing cavity 1 c.
In some embodiments, the second differential pressure detecting section 122 includes a second gas throttling device 1221 and a second differential pressure detecting member 1222; the second gas throttling device 1221 is arranged in the second cavity 1 b; the second pressure difference detecting element 1222 is connected to the control module 2, and the second pressure difference detecting element 1222 is disposed in the second cavity 1b for detecting a pressure difference between two ends of the second gas throttling device 1221. The control module 2 is configured to control the second adjusting element 121 according to the pressure difference detected by the second pressure difference detecting element 1222, so as to adjust the amount of air flowing from the second chamber 1b to the mixing chamber 1 c.
In a specific example, the second adjusting member 121 is a proportional valve, in particular a solenoid proportional valve. The second air throttling device 1221 is an air lock, and the second differential pressure detecting element 1222 is a differential pressure sensor. Specifically, referring to fig. 6, the second adjusting part 121 is disposed in the second cavity 1b, and the second gas throttling device 1221 is disposed in the second cavity 1b and disposed between the gas outlet end of the second cavity 1b and the second adjusting part 121. The differential pressure sensor detects the differential pressure between the front end and the rear end of the air resistance. Further, the control module 2 detects the difference of the pressure difference at the two ends of the air resistor according to the pressure difference sensor to adaptively adjust the opening and closing degree of the proportional valve, so that the gas flow in the second cavity 1b is adaptively adjusted.
In some embodiments, the gas mixing apparatus further comprises a calibration mechanism (not shown). The calibration mechanism is provided in the mixing unit, and is used to calibrate the first differential pressure detector 1122 and the second differential pressure detector 1222.
In this application, through set up calibration mechanism on gas mixing equipment, can effectively calibrate first pressure differential detection piece 1122 and second pressure differential detection piece 1222, effectively avoid the drift problem of zero point that pressure differential sensor used for a long time and brought, guarantee pressure differential sensor's detection precision.
In this application, utilize differential pressure sensor to be the key part of guaranteeing the real-time feedback control signal of proportional valve and gathering, for reducing gas mixing equipment overall dimension, no longer adopt traditional flow measurement sensor, but with gas throttling arrangement integrated to first cavity 1a and second cavity 1b, utilize differential pressure sensor to detect the pressure differential at air resistance both ends and realize the flow measurement in first cavity 1a and the second cavity 1b, have the characteristics that measuring sensitivity is high and the reliability is high. Further, the control module 2 controls different opening and closing degrees of the first regulating part 111 and the second regulating part 121 according to the pressure difference detected by the pressure difference sensor, so as to accurately adjust the mixing proportion of air and oxygen, namely, form closed-loop control, and further ensure the mixing precision requirement of the mixed gas. Furthermore, in order to ensure that the small flow detection precision of the differential pressure sensor can meet the requirements of practical application, a zero calibration mechanism is adopted to weaken the zero drift problem caused by long-time use of the sensor.
Further, air and oxygen enter the mixing cavity 1c after being controlled by the proportional valve respectively, the gas conduction amount of the first cavity 1a and the second cavity 1b is controlled based on the adjustment of the first adjusting piece 111 and the second adjusting piece 121, and gas mixing and output are realized in the cavities.
In some embodiments, the gas mixing apparatus further includes a filter (not shown) disposed at the gas inlet of the first chamber 1a and/or the second chamber 1b, and a pressure reducing valve 3 (refer to fig. 5 to 6) disposed in the first chamber 1a and/or the second chamber 1 b. In some embodiments, the filter is a sintered filter. When air and oxygen enter the gas mixing equipment, the air and the oxygen respectively pass through the filter to filter impurities in the gas, and the pressure reducing valve is used for adjusting the filtered oxygen and the filtered air to proper pressure and keeping the pressure stable, so that the stability of the output flow of the rear-end electromagnetic proportional valve is ensured.
In other embodiments, the gas mixing apparatus further comprises a pressure sensor 4 (refer to fig. 5-6) disposed in the first cavity 1a and/or the second cavity 1b for detecting the pressure in the first cavity 1a and/or the second cavity 1 b. In particular, the pressure sensor is provided at the inlet end of the first cavity 1a and/or the second cavity 1 b.
In some embodiments, the gas mixing apparatus includes a flow rate detecting portion (not shown) disposed at the gas outlet end of the mixing chamber 1c for detecting the flow rate of the gas. Further, the flow rate detection part is used for calibrating the flow rate of the mixed gas output by the mixing cavity 1c so as to calibrate a corresponding pressure value according to the gas flow rate.
In some embodiments, an electromagnetic proportional valve is used to cooperatively control the oxygen flow according to the actual working conditions, and when the first differential pressure detection portion 112 or the second differential pressure detection portion 122 detects that the oxygen flow rate is 1-10L/min, the proportional valve can be controlled by the control module 2.
In some embodiments, an electromagnetic proportional valve is used to control the air flow rate in a coordinated manner according to the actual working conditions, and when the first differential pressure detection portion 112 or the second differential pressure detection portion 122 detects that the air flow rate is 1-10L/min, the control module 2 can be used to control the proportional valve.
The gas mixing equipment further comprises a main control system and a display control system, and referring to fig. 7, the display control system sends a control instruction to the main control system through a CAN communication bus, the main control system controls the gas circuit module 1 in response to the received control instruction, and key parameters such as oxygen concentration, pressure and flow of the gas circuit module are monitored in real time. Meanwhile, the main control system feeds acquired sensor signals back to the display control system through the CAN, and corresponding parameters are displayed in a numerical form.
Further, the main control system is connected with the control module 2, the control module 2 includes a first air path control plate 2a and a second air path control plate 2b, the first air path control plate 2a is disposed on the first adjusting unit 11, and the first air path control plate 2a controls the first adjusting member 111 according to the pressure difference detected by the first pressure difference detecting part 112, so as to adjust the air inflow from the first cavity 1a to the mixing cavity 1 c; the second air path control plate 2b is disposed on the second adjusting unit 12, and the second air path control plate 2b controls the second adjusting member 121 according to the pressure difference detected by the second pressure difference detecting part 122, so as to adjust the amount of air flowing from the second cavity 1b to the mixing cavity 1 c.
Further, the display control system can set the set values of oxygen and air, the pressure difference detected by the first pressure difference detection part 112 or the pressure difference detected by the second pressure difference detection part 122 represents the deviation degree of the actual flow value and the set value, and the opening and closing degree of the proportional valve is controlled based on the pressure difference, so that closed-loop control is realized, and the air inflow can be accurately adjusted.
In some embodiments, the gas mixing apparatus further includes an alarm module (not shown in the drawings), and the alarm module is used for fault alarm and oxygen supply concentration monitoring overrun alarm of the gas circuit module 1.
In this application, gas mixing equipment has CAN bus interface, but remote control, and the gas flow of the first cavity of control 1a and second cavity 1b that CAN be more accurate guarantees that the patient inhales oxygen concentration and maintains at the safe value within range, and CAN satisfy the equipment that clinical treatment needs, CAN avoid the pure oxygen to inhale the side effect of bringing simultaneously.
The invention has been described above with reference to embodiments thereof. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention, and these alternatives and modifications are intended to be within the scope of the invention.
Claims (10)
1. A gas mixing apparatus, comprising:
the gas circuit module comprises a mixing part and an adjusting part arranged on the mixing part; the mixing part comprises a first cavity, a second cavity and a mixing cavity;
the control module is connected with the gas circuit module;
the adjusting part is used for adjusting the mixing proportion of the gas communicated to the mixing cavity from the first cavity and the second cavity according to the control of the control module.
2. The gas mixing apparatus of claim 1,
the adjusting part comprises a first adjusting unit and a second adjusting unit, the first adjusting unit is connected with the first cavity, and the second adjusting unit is connected with the second cavity;
the first adjusting unit is used for adjusting the air inflow communicated from the first cavity to the mixing cavity according to the control of the control module; the second adjusting unit is used for adjusting the air inflow communicated to the mixing cavity from the second cavity according to the control of the control module.
3. The gas mixing apparatus of claim 2,
the first adjusting unit comprises a first adjusting piece and a first differential pressure detecting part, and the first differential pressure detecting part is used for detecting the differential pressure in the first cavity;
the control module controls the first adjusting piece according to the pressure difference detected by the first pressure difference detecting part so as to adjust the air inflow communicated to the mixing cavity from the first cavity.
4. The gas mixing apparatus of claim 3,
the first differential pressure detecting portion includes a first gas throttling device and a first differential pressure detecting member; the first gas throttling device is arranged in the first cavity; the first pressure difference detection piece is connected with the control module, and the first pressure difference detection piece is arranged in the first cavity and used for detecting the pressure difference between the two ends of the first gas throttling device.
5. The gas mixing apparatus of claim 4,
the second regulating unit comprises a second regulating piece and a second differential pressure detecting part, and the second differential pressure detecting part is used for detecting the differential pressure in the second cavity;
the control module controls the second adjusting piece according to the pressure difference detected by the second pressure difference detecting part so as to adjust the air inflow communicated to the mixing cavity from the second cavity.
6. The gas mixing apparatus of claim 5,
the second differential pressure detecting part comprises a second gas throttling device and a second differential pressure detecting piece; the second gas throttling device is arranged in the second cavity; the second pressure difference detection piece is connected with the control module, and the second pressure difference detection piece is arranged in the second cavity and used for detecting the pressure difference at two ends of the second gas throttling device.
7. The gas mixing apparatus of claim 6, further comprising:
and the calibration mechanism is arranged in the mixing part and used for calibrating the first differential pressure detection piece and the second differential pressure detection piece.
8. The gas mixing apparatus of claim 5,
the first and second regulators are proportional valves.
9. The gas mixing apparatus of claim 6,
the first gas throttling device and the second gas throttling device are air resistors.
10. The gas mixing apparatus of claim 6,
the first differential pressure detecting member and the second differential pressure detecting member are differential pressure sensors.
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| CN202111646626.6A CN114432916A (en) | 2021-12-30 | 2021-12-30 | Gas mixing equipment |
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| CN202111646626.6A CN114432916A (en) | 2021-12-30 | 2021-12-30 | Gas mixing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259692A (en) * | 2022-07-14 | 2022-11-01 | 四川天马玻璃有限公司 | High-precision gas delivery system |
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| CN211011309U (en) * | 2019-10-30 | 2020-07-14 | 西安况能电力设备有限公司 | Boiler blow-down system's on-line monitoring control system |
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| CN115259692A (en) * | 2022-07-14 | 2022-11-01 | 四川天马玻璃有限公司 | High-precision gas delivery system |
| CN115259692B (en) * | 2022-07-14 | 2024-01-23 | 四川天马玻璃有限公司 | Control method of high-precision gas delivery system |
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