CN108627306A - The device and method for detecting gas circuit air-tightness - Google Patents
The device and method for detecting gas circuit air-tightness Download PDFInfo
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- CN108627306A CN108627306A CN201710153030.XA CN201710153030A CN108627306A CN 108627306 A CN108627306 A CN 108627306A CN 201710153030 A CN201710153030 A CN 201710153030A CN 108627306 A CN108627306 A CN 108627306A
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- gas circuit
- air
- tightness
- leak rate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The invention discloses a kind of device and method of detection gas circuit air-tightness, the device includes the dehydration device of sequence setting, gas chamber and aspiration pump, the dehydration device is provided with air inlet, pressure sensor is installed in gas circuit between the gas chamber and the aspiration pump, it further include control system, the control system is connect with the pressure sensor and the aspiration pump respectively, with in the inlet close, by the aspiration pump, multiple pressure values of the first gas circuit judge whether the air-tightness of first gas circuit meets the requirements under multiple operating statuses, gas circuit of first gas circuit between the dehydration device and the aspiration pump.The invention has the advantages that：The air-tightness of gas circuit can be detected at any time, and feed back testing result.
Description
Technical field
The present invention relates to air-leakage test fields, and in particular to a kind of device and method of detection gas circuit air-tightness.
Background technology
Currently, measuring patient respiration gas using monitor continuous non-invasive has been widely used for clinic.According to gas
The method of sampling is different, is broadly divided into two class of mainstream and by-pass flow to the monitoring of patient respiration gas, especially by-pass flow method is clinically answered
With the most extensively.In order to ensure that the accuracy measured, the air-tightness of the entire gas circuit of module must keep good, air-tightness is bad to be made
At measurement parameter it is inaccurate such as：Other interference gas that numerical value is relatively low, waveform morphology is abnormal, is also possible to other than introducing object gas
Body further influences measurement result, and the deviation of measurement accuracy is likely to that treatment is caused to be delayed, causes serious injury to patient.
In the prior art, there are no the equipment that can be detected at any time to the gas circuit air-tightness of by-pass flow method custodial care facility.
It therefore, need a kind of device and method that can detect at any time of gas circuit air-tightness to by-pass flow method custodial care facility.
Invention content
The present invention is directed at least solve one of above-mentioned technical problem.
For this purpose, an object of the present invention is to provide a kind of device of detection gas circuit air-tightness, which can be at any time
The air-tightness of gas circuit is detected, and feeds back testing result.
To achieve the goals above, embodiment of the invention discloses that a kind of device of detection gas circuit air-tightness, including suitable
Dehydration device, gas chamber and the aspiration pump of sequence setting, the dehydration device is provided with air inlet, in the gas chamber and the aspiration pump
Between gas circuit on pressure sensor is installed, further include control system, the control system respectively with the pressure sensor
Connected with the aspiration pump, in the inlet close, by the aspiration pump under multiple operating statuses the first gas circuit
Multiple pressure values judge whether the air-tightness of first gas circuit meets the requirements, first gas circuit be the dehydration device with
Gas circuit between the aspiration pump.
Further, the control system includes：First timer is interrupted for generating first, to control the pumping
The opening and closing of pump；Second timer is interrupted for generating second, to control the pressure that the pressure sensor acquires the first gas circuit
Value；Control unit is additionally operable to according to multiple for controlling the first timer and the second timer in the aspiration pump
Operating status under the pressure value of the first gas circuit judge whether the air-tightness of first gas circuit meets the requirement.
Further, there are two outlet passageways, described two outlet passageways to be filled by a connection for the dehydration device tool
It sets and is connected to the gas chamber, the vapour lock value of described two outlet passageways is different.
Further, the aspiration pump is diaphragm pump.
Further, further include feedback device, the feedback device is used for when the air-tightness of first gas circuit is normal
The first feedback is carried out, and carries out the second feedback in the airtight sexual abnormality of first gas circuit.
The device of detection gas circuit air-tightness according to the ... of the embodiment of the present invention, by controlling the operating status of aspiration pump, then root
Whether the air-tightness that the first gas circuit can be detected according to the pressure change in setting the first gas circuit of moment is normal, and is carried out according to detection
Feedback, to realize at any time to the detection of air-tightness.
It is another object of the present invention to propose a kind of method of detection gas circuit air-tightness, this method can be at any time to gas
The air-tightness on road is detected, and feeds back testing result.
To achieve the goals above, embodiment of the invention discloses that a kind of method of detection gas circuit air-tightness, including upper
The device of the detection gas circuit air-tightness of embodiment is stated, this approach includes the following steps：S1；In bleeding point closing and the pumping
When air pump is closed, the first air pressure of first gas circuit is acquired；S2：The aspiration pump is controlled with predetermined power to first gas
Road is evacuated, and is stopped pumping identification when being evacuated to pressure less than or equal to the second preset pressure value and is depressured successfully, or pumping is super
It crosses and stops pumping when pressure after the first preset time is more than second preset pressure value and assert decompression failure；S3：When decompression at
The first leak rate of first gas circuit is calculated when work(；S4：If first leak rate is less than the default leak rate threshold value,
Then judge that the air-tightness of first gas circuit is normal.
Further, further include：S301：When being depressured successfully, start every third preset time acquisition primary described the
The pressure value of one gas circuit acquires the pressure value of the first gas circuit described in n times altogether, wherein N is natural number and N>1；S302：According to adopting
The pressure value of first gas circuit described in the n times of collection calculates the first leak rate of first gas circuit.
Further, further include：If first leak rate is more than or equal to the default leak rate threshold value, repeat to hold
Row step S301-S302 obtains the first leak rate of multiple first gas circuits, if the first leakage of multiple first gas circuits
There are the first leak rates of the first gas circuit described in some to be less than the default leak rate threshold value in gas rate, then judges first gas
The air-tightness on road is normal.
Further, further include：If the first leak rate of multiple first gas circuits is all higher than the default leak rate
Threshold value, and be more than preset longest detection time, then judge the airtight sexual abnormality of first gas circuit.
Further, it is fed back according to the air-tightness judging result of first gas circuit.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the device of the detection gas circuit air-tightness of one embodiment of the invention；
Fig. 2 is the flow chart of the method for the detection gas circuit air-tightness of the embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
With reference to following description and drawings, it will be clear that these and other aspects of the embodiment of the present invention.In these descriptions
In attached drawing, some particular implementations in the embodiment of the present invention are specifically disclosed, to indicate to implement the implementation of the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, the present invention
Embodiment includes all changes, modification and the equivalent fallen within the scope of the spirit and intension of attached claims.
The present invention is described below in conjunction with attached drawing.
Fig. 1 is the structural schematic diagram of the device of the detection gas circuit air-tightness of one embodiment of the invention.As shown in Figure 1, root
According to the device of the detection gas circuit air-tightness of the embodiment of the present invention, include dehydration device 1, gas chamber 2 and the aspiration pump 4 of sequence setting.
Dehydration device 1 is provided with air inlet (opening in left side in Fig. 1).Pacify in gas circuit between gas chamber 2 and aspiration pump 4
Equipped with pressure sensor 3, pressure sensor 3 is used to acquire the pressure value of the first gas circuit, wherein the first gas circuit is dehydration device 1
With the gas circuit between aspiration pump 4.The device of the detection gas circuit air-tightness of the present invention further includes control system 5, and control system 5 is distinguished
Connect with pressure sensor 3 and aspiration pump 4, in inlet close, by aspiration pump 4 under multiple operating statuses the first gas
Multiple pressure values on road judge whether the air-tightness of the first gas circuit meets the requirements.
In one embodiment of invention, dehydration device 1 is dehydration cup, is had there are one air inlet and two outlet passageways,
Two outlet passageways are connected to by an attachment device with gas chamber 2.Wherein, the vapour lock value of two outlet passageways is different.Work as gas
After air inlet enters dehydration cup, dehydration cup absorbs the moisture in gas.Then gas passes through two outlet passageway streams
Go out, the vapour lock value of two outlet passageways is different.
In one embodiment of the invention, control system 5 includes first timer, second timer and control unit.
Wherein, first timer is interrupted for generating first, to control the opening and closing of aspiration pump 4, i.e., when aspiration pump 4 receives run signal at
It is evacuated in open state, and according to corresponding the first gas circuit of power pair of run signal, when aspiration pump receives the first interruption letter
Number when, stop be evacuated simultaneously close aspiration pump 4, be that the first gas circuit is in closed state.Second timer is interrupted for generating second,
The pressure value of the first gas circuit is acquired with control pressure sensor 3, i.e., is acquired when pressure sensor 3 receives the second interrupt signal every time
The pressure value of first gas circuit.Control unit is additionally operable to taken out according to multiple in for controlling first timer and second timer
The pressure value of the first gas circuit under the operating status of air pump 1 judges whether the air-tightness of 1 first gas circuit meets the requirements.
In one embodiment of the invention, aspiration pump 1 is diaphragm pump.Control system 5 of the diaphragm pump 1 in process control
The flow of gas in first gas circuit makes controlled variable maintain in required range, has the advantages that control flow is accurate.
In one embodiment of the invention, the device of detection gas circuit air-tightness further includes feedback device.Feedback device is used
The first feedback is carried out when the air-tightness in the first gas circuit is normal, that is, the air-tightness for feeding back the first gas circuit is normal, the mode of feedback
It can be fed back to user by the form of video, audio or word.Feedback device is additionally operable to the air-tightness in the first gas circuit
The second feedback is carried out when abnormal, that is, feeds back the airtight sexual abnormality of the first gas circuit, the mode of feedback can pass through video, audio or text
The form of word is fed back to user.
The device of the survey gas circuit air-tightness of the embodiment of the present invention passes through acquisition by closed in the first gas circuit
In pressure value sometime and the pressure value after being depressured to the first gas circuit, then gathering dip time and suction power can be with
Judge whether the air-tightness of the first gas circuit meets the requirements.
The invention also provides a kind of methods of detection gas circuit air-tightness, include the detection gas circuit air-tightness of above-described embodiment
Device.Fig. 2 is the flow chart of the method for the detection gas circuit air-tightness of the embodiment of the present invention.As shown in Fig. 2, this method include with
Lower step：
S1；When bleeding point is closed and aspiration pump is closed, the first air pressure of the first gas circuit is acquired.
Specifically, the device for detecting gas circuit air-tightness is initialized, pressure sensor 3 is started to work, and acquisition is at this time
Pressure value in first gas circuit is as first pressure value P1.
S2：It controls the aspiration pump to be evacuated first gas circuit with predetermined power, is evacuated to pressure and is less than or equal to
Stop pumping when the second preset pressure value and assert be depressured successfully, or is evacuated more than pressure after the first preset time more than described the
Stop pumping when two preset pressure values and assert decompression failure.
Specifically, aspiration pump 4 is evacuated with certain the first gas circuit of power pair, is depressured.When the step carries out, it is dehydrated cup
1 front end is clogging, and connector is inserted into 1 rear end of dehydration cup, and two-way pumping connector is connected with a connecting tube and gas chamber 2 connects
Pressure sensor 3 is connected to by threeway with aspiration pump 4 again after connecing, such connection status is to be detected to the first gas circuit
Gas circuit connection type.Dehydration cup 1 can also be removed.This connection type can help to position air leakage point as early as possible in dehydration cup
1 still in the gas circuit where other devices.Control system 5 is controlled aspiration pump 1 and is evacuated with certain power, and pressure is evacuated to
It is depressured successfully to stop pumping identification when the second preset pressure value P2 or following, or in pumping more than longest preset time threshold
Stop pumping when pressure is more than the second preset pressure value after T1 and assert decompression failure.
S3：When being depressured successfully, the first leak rate of the first gas circuit can be calculated.
Wherein, the second preset pressure value P2 be according to first pressure value P1, the suction power of aspiration pump 4 and first it is default when
Between, assuming that the air-tightness of the first gas circuit was set under the premise of meeting the requirements.If be depressured successfully, the first gas circuit is calculated
First leak rate V1.
S4：If the first leak rate V1 is less than default leak rate threshold value V, judge that the air-tightness of the first gas circuit is normal.
In one embodiment of the invention, the calculating step of the first leak rate includes：
S301：When being depressured successfully, starts the pressure value for acquiring first gas circuit every third preset time, acquire altogether
The pressure value of the first gas circuit of n times, wherein N is natural number and N>1.
In one embodiment of the invention, the pressure value of first gas circuit of acquisition in each 0.1 second acquires 30 times the altogether
The pressure value of one gas circuit, i.e. N=30.
S302：The first leak rate V1 of the first gas circuit is calculated according to the pressure value of the first gas circuit of n times of acquisition.
Specifically, the difference of each adjacent two pressure value is summed to calculate the first leak rate in the pressure value acquired according to 30 times
V1。。
D：If the first leak rate is less than default leak rate threshold value, then it is assumed that the air-tightness of the first gas circuit is normal.
In one embodiment of the invention, the method for detection gas circuit air-tightness further includes：If the first leak rate V1 is big
In equal to default leak rate threshold value V, then repeats step S301-S302 and obtains the first leak rate V1 of multiple first gas circuits,
If there are the first leak rates of some the first gas circuit to be less than default leak rate threshold in the first leak rate V1 of multiple first gas circuits
Value V then judges that the air-tightness of the first gas circuit is normal.
In the example of the present invention, step B-C is repeated, if the first leak rate V1 of certain calculating<V, then
Judge that the air-tightness of the first gas circuit is normal.This is done because the pressure values of gas circuit gradually to restore, and sets a longest inspection
It surveys the time and (assuming that being 30 seconds, if calculating leak rate V1 in 30 seconds does not meet predetermined threshold value, judges airtight sexual abnormality),
The leak rate of the first gas circuit of repeated detection in this time, to avoid the accuracy detected due to single is low and causes to the first gas
The judging result of the air-tightness on road.
In one embodiment of the invention, the method for detection gas circuit air-tightness further includes：If multiple first gas circuits
First leak rate is all higher than default leak rate threshold value, then judges the airtight sexual abnormality of the first gas circuit.
Specifically, if the first all leak rate V1 surveyed in 30 seconds>V, then it represents that the air-tightness of the first gas circuit is different
Often.
In one embodiment of the invention, the method for detection gas circuit air-tightness further includes：According to the airtight of the first gas circuit
Property judging result is fed back, i.e. normal to user feedback air-tightness when the air-tightness of the first gas circuit is normal, when the first gas circuit
To the airtight sexual abnormality of user feedback when airtight sexual abnormality.
In addition, other compositions of the device and method of the detection gas circuit air-tightness of the embodiment of the present invention and effect are for this
All it is known for the technical staff in field, in order to reduce redundancy, does not repeat.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is by claim and its equivalent limits.
Claims (10)
1. a kind of device of detection gas circuit air-tightness, which is characterized in that include dehydration device, gas chamber and the pumping of sequence setting
Pump, the dehydration device are provided with air inlet, pressure sensing are equipped in the gas circuit between the gas chamber and the aspiration pump
Device further includes control system, and the control system is connect with the pressure sensor and the aspiration pump respectively, with it is described into
When gas port is closed, by the aspiration pump, multiple pressure values of the first gas circuit judge first gas circuit under multiple operating statuses
Air-tightness whether meet the requirements, gas circuit of first gas circuit between the dehydration device and the aspiration pump.
2. the device of detection gas circuit air-tightness according to claim 1, which is characterized in that the control system includes：
First timer is interrupted for generating first, to control the opening and closing of the aspiration pump；
Second timer is interrupted for generating second, to control the pressure value that the pressure sensor acquires the first gas circuit；
Control unit is additionally operable to according to multiple for controlling the first timer and the second timer in the pumping
The pressure value of the first gas circuit under the operating status of pump judges whether the air-tightness of first gas circuit meets the requirement.
3. the device of detection gas circuit air-tightness according to claim 1, which is characterized in that there are two the dehydration device tools
Outlet passageway, described two outlet passageways are connected to by an attachment device with the gas chamber, the gas of described two outlet passageways
Resistance value is different.
4. the device of detection gas circuit air-tightness according to claim 1, which is characterized in that the aspiration pump is diaphragm pump.
5. the device of detection gas circuit air-tightness according to claim 1, which is characterized in that further include feedback device, it is described
Feedback device is used to carry out the first feedback when the air-tightness of first gas circuit is normal, and in the air-tightness of first gas circuit
The second feedback is carried out when abnormal.
6. a kind of method of detection gas circuit air-tightness, which is characterized in that including a kind of inspection described in any one of claim 1-5
The device of gas circuit air-tightness is surveyed, this approach includes the following steps：
S1；When the bleeding point is closed and the aspiration pump is closed, the first air pressure of first gas circuit is acquired；
S2：It controls the aspiration pump to be evacuated first gas circuit with predetermined power, is evacuated to pressure and is less than or equal to second
Stop pumping identification when preset pressure value to be depressured successfully, or pumping is pre- more than described second more than pressure after the first preset time
If stopping pumping when pressure value assert decompression failure；
S3：The first leak rate of first gas circuit is calculated when being depressured successfully；
S4：If first leak rate is less than the default leak rate threshold value, the air-tightness of first gas circuit is being judged just
Often.
7. the method for detection gas circuit air-tightness according to claim 6, which is characterized in that the calculating of first leak rate
Step includes：
S301：When being depressured successfully, starts the pressure value for acquiring primary first gas circuit every third preset time, acquire altogether
The pressure value of first gas circuit described in n times, wherein N is natural number and N>1；
S302：The pressure value of first gas circuit described in n times according to acquisition calculates the first leak rate of first gas circuit.
8. the method for detection gas circuit air-tightness according to claim 7, which is characterized in that further include：
If first leak rate is more than or equal to the default leak rate threshold value, repeats step S301-S302 and obtain
First leak rate of multiple first gas circuits, if there are described in some in the first leak rate of multiple first gas circuits
First leak rate of one gas circuit is less than the default leak rate threshold value, then judges that the air-tightness of first gas circuit is normal.
9. the method for detection gas circuit air-tightness according to claim 8, which is characterized in that further include：
If the first leak rate of multiple first gas circuits is all higher than the default leak rate threshold value, and is examined more than default longest
The time is surveyed, then judges the airtight sexual abnormality of first gas circuit.
10. the method for the detection gas circuit air-tightness according to any one of claim 6-9, which is characterized in that further include：
It is fed back according to the air-tightness judging result of first gas circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153030.XA CN108627306A (en) | 2017-03-15 | 2017-03-15 | The device and method for detecting gas circuit air-tightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153030.XA CN108627306A (en) | 2017-03-15 | 2017-03-15 | The device and method for detecting gas circuit air-tightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108627306A true CN108627306A (en) | 2018-10-09 |
Family
ID=63687360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710153030.XA Withdrawn CN108627306A (en) | 2017-03-15 | 2017-03-15 | The device and method for detecting gas circuit air-tightness |
Country Status (1)
| Country | Link |
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| CN (1) | CN108627306A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197916A (en) * | 2020-09-08 | 2021-01-08 | 威凯检测技术有限公司 | Method for detecting air tightness of refrigerating system |
| CN113567065A (en) * | 2021-07-27 | 2021-10-29 | 中国人民解放军陆军军医大学第一附属医院 | Fault monitoring system of negative pressure isolation cabin |
| CN115655597A (en) * | 2022-12-13 | 2023-01-31 | 杭州兆华电子股份有限公司 | Air tightness detection system and method for microphone |
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| CN106164639A (en) * | 2014-04-07 | 2016-11-23 | 德铃通信部品有限公司 | Endoscope leaks automatic detection device and detection method thereof |
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| JPH1114493A (en) * | 1997-06-20 | 1999-01-22 | Tokyo Gas Co Ltd | Gas pipe airtightness test method and airtightness test apparatus |
| WO2003046502A1 (en) * | 2001-11-27 | 2003-06-05 | Aim Tech Co., Ltd. | Pressure measuring method and device |
| CN100447545C (en) * | 2002-03-15 | 2008-12-31 | 奥林巴斯株式会社 | Leak tester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197916A (en) * | 2020-09-08 | 2021-01-08 | 威凯检测技术有限公司 | Method for detecting air tightness of refrigerating system |
| CN113567065A (en) * | 2021-07-27 | 2021-10-29 | 中国人民解放军陆军军医大学第一附属医院 | Fault monitoring system of negative pressure isolation cabin |
| CN113567065B (en) * | 2021-07-27 | 2024-01-30 | 中国人民解放军陆军军医大学第一附属医院 | Fault monitoring system of negative pressure isolation cabin |
| CN115655597A (en) * | 2022-12-13 | 2023-01-31 | 杭州兆华电子股份有限公司 | Air tightness detection system and method for microphone |
| CN115655597B (en) * | 2022-12-13 | 2023-04-14 | 杭州兆华电子股份有限公司 | Air tightness detection system and method for microphone |
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Application publication date: 20181009 |
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