CN108594915B - Volume-adjustable closed chamber and control method - Google Patents
Volume-adjustable closed chamber and control method Download PDFInfo
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- CN108594915B CN108594915B CN201810682195.0A CN201810682195A CN108594915B CN 108594915 B CN108594915 B CN 108594915B CN 201810682195 A CN201810682195 A CN 201810682195A CN 108594915 B CN108594915 B CN 108594915B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Abstract
The invention discloses a closed chamber with adjustable volume and a control method, comprising a closed chamber and a gas compensation device, wherein the gas compensation device is arranged on one surface or multiple surfaces of the closed chamber, the gas compensation device comprises an orifice plate, a pressing plate, a driving device and an elastic membrane, the orifice plate is arranged on any one surface or multiple surfaces of the closed chamber, the elastic membrane is arranged on the outer side surface of the corresponding orifice plate and can expand or contract relative to the inner part of the closed chamber, the pressing plate is arranged on the outer side surface of the corresponding elastic membrane, and the driving device is in transmission connection with the corresponding pressing plate so as to drive the pressing plate to move back and forth, so that the elastic membrane is pressed to be contacted with the orifice plate. The invention has simple structure, through the arrangement of the elastic membrane, when the temperature in the closed chamber rises, the elastic membrane expands, and when the temperature in the closed chamber falls, the elastic membrane contracts, thereby changing the volume in the closed chamber, so that the volume in the closed chamber is changed along with the change of the test temperature, and the detection precision is effectively improved.
Description
Technical Field
The invention relates to the technical field of closed chambers, in particular to a closed chamber with adjustable volume and a control method.
Background
In the existing automobile, harmful substances volatilize in parts such as an oil tank, a tire, automobile exterior trim and an automobile chassis, and when the concentration of the volatile harmful substances exceeds a certain range, the harmful substances can be damaged to human bodies, so that the harmful substances of the automobile are required to be collected and detected.
However, the internal volume of the existing evaporation airtight chamber is mostly fixed, the volume of the airtight chamber cannot be changed according to the detection requirement during detection, when the internal temperature of the airtight chamber changes, the volume of the airtight chamber cannot be changed, so that external polluted gas enters the airtight chamber due to air pressure difference, the detection precision is affected, and the detection requirements under various temperatures cannot be met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the volume-adjustable closed chamber which can avoid the influence of external environment or other uncertain factors on the test result so as to effectively improve the detection precision.
In order to achieve the above purpose, the invention provides a closed chamber with adjustable volume, which comprises a closed chamber, wherein a gas compensation device for compensating the gas volume in the closed chamber in the gas sampling process is arranged on the closed chamber, the gas compensation device is arranged on one surface or multiple surfaces of the closed chamber, the gas compensation device comprises a pore plate, a pressing plate, a driving device and an elastic membrane, the pore plate is arranged on any one surface or multiple surfaces of the closed chamber, the elastic membrane is arranged on the outer side surface of the corresponding pore plate and can expand or contract relative to the interior of the closed chamber, the pressing plate is arranged on the outer side surface of the corresponding elastic membrane, and the driving device is in transmission connection with the corresponding pressing plate so as to drive the pressing plate to move forwards and backwards, and the elastic membrane is pressed to be contacted with the pore plate.
Preferably, the drive means is provided as a pneumatic or electric or manual drive means.
Preferably, the closed chamber outer cover is provided with a temperature-adjusting or humidity-adjusting jacket, and the temperature-adjusting or humidity-adjusting jacket is provided with a temperature-controlling or humidity-controlling unit.
Preferably, a temperature adjusting control unit is arranged inside or outside the closed chamber, and a closed cabin door is arranged on the closed chamber.
Preferably, a stirring fan is arranged in the closed chamber.
Preferably, the closed chamber is connected with an exhaust pipeline, and a gas exchange valve is arranged on the exhaust pipeline.
Preferably, the closed chamber is connected with an air inlet pipeline, and an air inlet flowmeter or/and an air inlet valve is/are arranged on the air inlet pipeline.
The control method for the volume-adjustable closed chamber comprises the following steps:
1) Keeping a closed cabin door of the closed chamber closed, opening a ventilation valve, adjusting a temperature control or humidity control unit of a temperature-adjusting or humidity-adjusting jacket, and adjusting a temperature-adjusting control unit in the closed chamber to enable the temperature in the closed chamber to reach t1;
2) The driving device starts to move, the elastic membrane is driven to be pressed with the pore plate, the ventilation valve is closed, and the ventilation valve is closed, so that the internal volume of the closed chamber is the geometric volume of the closed chamber;
3) The driving device resets, the temperature in the closed chamber is increased to t2, the air in the closed chamber is expanded, the elastic membrane is expanded and swelled, and the volume of the closed chamber is as follows: ((273+t2)/(273+t1)). Geometric volume of the closed chamber, thereby obtaining the volume of the closed chamber at t2 temperature;
4) The temperature inside the closed chamber is raised again to t3, and the volume of the closed chamber is: ((273+t3)/(273+t1)). The geometric volume of the closed chamber, thereby obtaining the volume of the closed chamber at t3 temperature.
The control method for the volume-adjustable closed chamber comprises the following steps:
1) Keeping a closed cabin door of the closed chamber closed, opening a ventilation valve, adjusting a temperature control or humidity control unit of a temperature-adjusting or humidity-adjusting jacket, and adjusting a temperature-adjusting control unit in the closed chamber to enable the temperature in the closed chamber to reach t1;
2) The driving device starts to move, the elastic membrane is driven to be pressed with the pore plate, the ventilation valve is closed, and the ventilation valve is closed, so that the internal volume of the closed chamber is the geometric volume of the closed chamber;
3) Resetting the driving device, opening an air inlet valve, introducing clean gas into the closed chamber through an air inlet pipeline and an air inlet flowmeter, wherein the volume of the introduced gas is V1, expanding air in the closed chamber, and expanding the elastic membrane, wherein the volume of the closed chamber is V1 < + > and the geometric volume of the closed chamber;
4) And (3) adjusting a temperature control or humidity control unit of the temperature-adjusting or humidity-adjusting jacket to enable the temperature inside the closed chamber to rise or fall to t2, expanding or contracting air inside the closed chamber, and expanding or contracting the elastic membrane, wherein the volume of the closed chamber is (V1 + the geometric volume of the closed chamber) (273 + t 2)/(273 + t 1).
Compared with the prior art, the invention has the beneficial effects that:
the invention has simple structure, comprises a closed chamber and a gas compensation device for compensating the gas volume in the closed chamber in the gas sampling process, wherein the gas compensation device is arranged on one surface or multiple surfaces of the closed chamber, the gas compensation device comprises a pore plate, a pressing plate, a driving device and an elastic membrane, the pore plate is arranged on any one surface or multiple surfaces of the closed chamber, the elastic membrane is arranged on the outer side surface of the corresponding pore plate and can expand or contract relative to the inner side of the closed chamber, the pressing plate is arranged on the outer side surface of the corresponding elastic membrane, the driving device is in transmission connection with the corresponding pressing plate, so that the pressing plate is driven to move back and forth, the elastic membrane is tightly contacted with the pore plate, when the inner temperature of the closed chamber rises, the elastic membrane expands, when the inner temperature of the closed chamber falls, the elastic membrane contracts, so that the inner volume of the closed chamber changes at a specific temperature, or the inner volume of the closed chamber changes along with the change of the test temperature, and the detection precision is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the whole structure of a volume-adjustable closed chamber provided by the invention;
fig. 2 is a schematic diagram of the overall structure of another volume-adjustable closed chamber according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a volume-adjustable closed chamber, which includes a closed chamber 1 and a gas compensation device 2 for compensating the gas volume in the closed chamber during the gas sampling process, wherein the gas compensation device 2 is disposed on one or more sides of the closed chamber 1, the gas compensation device 2 includes an orifice plate 3, a pressure plate 4, a driving device 5 and an elastic membrane 6, the orifice plate 3 is disposed on any one or more sides of the closed chamber 1, the elastic membrane 6 is disposed on an outer side surface of the corresponding orifice plate 3 and can expand or contract relative to the interior of the closed chamber 1, the pressure plate 4 is disposed on an outer side surface of the corresponding elastic membrane 6, and the driving device 5 is in transmission connection with the corresponding pressure plate 4, so as to drive the pressure plate 4 to move back and forth, thereby compressing the elastic membrane 6 to contact the orifice plate 3, and this embodiment will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a gas compensation device 2 for compensating the gas volume in the closed chamber 1 in the gas sampling process is arranged on the closed chamber 1, the gas compensation device 2 is arranged on one surface or multiple surfaces of the closed chamber 1, wherein the gas compensation device 2 comprises an orifice plate 3, a pressing plate 4, a driving device 5 and an elastic membrane 6, the orifice plate 3 is arranged on any one surface or multiple surfaces of the closed chamber 1, the elastic membrane 6 is arranged on the outer side surface of the corresponding orifice plate 3 and can expand or contract relative to the interior of the closed chamber 1, the pressing plate 4 is arranged on the outer side surface of the corresponding elastic membrane 6, the driving device 5 is in transmission connection with the corresponding pressing plate 4, so that the pressing plate 4 is driven to move back and forth, the elastic membrane 6 is in contact with the orifice plate 3, through the arrangement of the elastic membrane 6, when the interior temperature of the closed chamber 1 rises, the elastic membrane 6 expands, when the interior temperature of the closed chamber 1 drops, the interior volume of the closed chamber 1 changes at a specific temperature, so that the volume of the interior of the closed chamber 1 changes, the interior volume of the closed chamber 1 changes along with the change of the test temperature, and the detection accuracy is effectively improved.
In this embodiment, the driving device 5 may be a pneumatic, electric or manual driving device, and may be selected according to practical situations, which is not limited to this embodiment.
Preferably, the outer cover of the closed chamber 1 is provided with a temperature-adjusting or humidity-adjusting jacket 7, the temperature-adjusting or humidity-adjusting jacket 7 is provided with a temperature-controlling or humidity-controlling unit, the temperature or humidity inside the closed chamber 1 is effectively kept through the arrangement of the temperature-adjusting or humidity-adjusting jacket 7, a standard and stable testing environment is provided for testing, and the testing precision is effectively ensured.
Preferably, be provided with airtight hatch door 15 on the seal chamber 1, airtight chamber 1 is inside to be provided with temperature control unit 8 and stirring fan 9, through the setting of temperature control unit 8, controls the regulation to the inside temperature of seal chamber 1, effectively guarantees the precision of test, through the setting of stirring fan 9, effectively with airtight chamber 1 inside gaseous stirring, be convenient for detect the replacement of preceding gas and when sampling with airtight chamber inside gas concentration stirring.
In this embodiment, the airtight chamber 1 is connected with the exhaust pipe 10, and the exhaust pipe 10 is provided with the scavenging valve 11, before detection, the polluted gas in the airtight chamber 1 is discharged, and the polluted gas is replaced by clean and pollution-free gas, so that the testing precision is effectively ensured.
A closed chamber of adjustable volume comprising the following adjustment steps:
(1) Keeping a closed cabin door 15 of the closed chamber 1 closed, opening a ventilation valve 11, adjusting a temperature control unit or a humidity control unit of a temperature or humidity control jacket 7, and adjusting a temperature control unit 8 in the closed chamber 1 to enable the temperature in the closed chamber 1 to reach t1;
(2) The driving device 5 starts to operate, the elastic membrane 6 is driven to be pressed with the pore plate 3, the ventilation valve 11 is closed, and the internal volume of the closed chamber 1 is the geometric volume of the closed chamber 1;
(3) The driving device 5 is reset, the temperature in the closed chamber 1 is increased to t2, the air in the closed chamber 1 is expanded, the elastic membrane 3 is expanded and swelled, and at this time, the volume of the closed chamber 1 is as follows: ((273+t2)/(273+t1)). Geometric volume of the closed chamber, thereby obtaining the volume of the closed chamber 1 at t 2;
(4) The temperature inside the closed chamber 1 is again raised to t3, and at this time, the volume of the closed chamber 1 is: ((273+t3)/(273+t1)). The geometric volume of the closed chamber, thereby obtaining the volume of the closed chamber 1 at t3 temperature.
Therefore, when the temperature range of the internal temperature of the closed chamber 1 is changed from t1 to t3, the internal volume of the closed chamber 1 is adjusted, so that the gas in the closed chamber 1 is effectively ensured to be free from leakage and exchange in the temperature change process, and the internal pressure of the closed chamber 1 is ensured to be constant.
When the temperature in the airtight chamber 1 rises, the elastic membrane expands, and when the temperature in the airtight chamber 1 falls, the elastic membrane 6 contracts, so that the volume in the airtight chamber 1 is changed, the volume in the airtight chamber 1 is changed along with the change of the test temperature, and the detection precision is effectively improved.
Example two
The second embodiment of the present invention provides another volume-adjustable closed chamber, the closed chamber 1 is connected with an air inlet pipeline 12, the air inlet pipeline 12 is provided with an air inlet flowmeter 13 and/or an air inlet valve 14, and the volume-adjustable closed chamber of the second embodiment of the present invention has the same structure as the volume-adjustable closed chamber of the first embodiment, and the same parts are not repeated.
In this embodiment, the closed chamber 1 is connected with an air inlet pipe 12, an air inlet flowmeter 13 and/or an air inlet valve 14 are/is installed on the air inlet pipe 12, the driving device 5 is reset, the air inlet valve 14 is opened, clean gas is introduced into the closed chamber 1 through the air inlet pipe 12 and the air inlet flowmeter 13, the volume of the introduced gas is V1, the air in the closed chamber 1 expands, the elastic membrane 6 swells and expands, and the volume of the closed chamber 1 is v1+ the geometric volume of the closed chamber at this time.
In this embodiment, a closed chamber with adjustable volume includes the following adjustment steps:
(1) Keeping a closed cabin door of the closed chamber 1 closed 15, opening a ventilation valve 11, adjusting a temperature control unit or a humidity control unit of a temperature or humidity control jacket 4, and adjusting a temperature control unit 8 in the closed chamber 1 to enable the temperature in the closed chamber 1 to reach t1;
(2) The driving device 5 starts to move, the elastic membrane 6 is driven to be pressed with the pore plate 3, the ventilation valve 11 is closed, and at the moment, the internal volume of the closed chamber 1 is the geometric volume of the closed chamber 1;
(3) Resetting the driving device 5, opening the air inlet valve 14, introducing clean gas into the closed chamber 1 through the air inlet pipeline 12 and the air inlet flowmeter 13, wherein the volume of the introduced gas is V1, expanding air in the closed chamber 1, and swelling and expanding the elastic membrane 6, so that the volume of the closed chamber 1 is V1 < + > and the geometric volume of the closed chamber is the same;
4) And (3) adjusting a temperature control or humidity control unit of the temperature-adjusting or humidity-adjusting jacket to enable the temperature inside the closed chamber to rise or fall to t2, expanding or contracting air inside the closed chamber, and expanding or contracting the elastic membrane, wherein the volume of the closed chamber is (V1 + the geometric volume of the closed chamber) (273 + t 2)/(273 + t 1).
The initial adjustment of the internal volume of the closed chamber 1 is realized, and after the inflation is completed, the internal standard volume of the closed chamber 1 is V1 < + > the geometric volume of the closed chamber. When the temperature inside the closed chamber 1 rises, the elastic membrane expands, when the temperature inside the closed chamber 1 falls, the elastic membrane 6 contracts, and when the temperature inside the closed chamber 1 changes, the pressure inside the closed chamber 1 is kept stable, and the internal gas is free from leakage and exchange.
In the first and second embodiments, the influence of the atmospheric pressure and humidity is taken into consideration in the detection, and the influence factor of the atmospheric pressure and humidity is added to the change in the internal volume of the closed chamber 1.
In summary, the invention has a simple structure, and comprises a closed chamber 1 and a gas compensation device 2 for compensating the gas volume in the closed chamber 1 in the gas sampling process, wherein the gas compensation device 2 is arranged on one surface or multiple surfaces of the closed chamber 1, the gas compensation device 2 comprises a pore plate 3, a pressing plate 4, a driving device 5 and an elastic membrane 6, the pore plate 3 is arranged on any one surface or multiple surfaces of the closed chamber 1, the elastic membrane 6 is arranged on the outer side surface of the corresponding pore plate 3 and can expand or contract relative to the interior of the closed chamber 1, the pressing plate 4 is arranged on the outer side surface of the corresponding elastic membrane 6, the driving device 5 is in transmission connection with the corresponding pressing plate 4, so that the pressing plate 4 is driven to move back and forth, the elastic membrane 6 is pressed into contact with the pore plate 3, and through the arrangement of the elastic membrane 6, when the temperature in the closed chamber 1 rises, the elastic membrane 6 expands, when the temperature in the closed chamber 1 falls, the internal volume of the closed chamber 1 changes at a specific temperature, or through the air inlet to the interior of the closed chamber 1, the volume of the closed chamber 1 changes, and the internal volume of the closed chamber 1 changes with the detection accuracy of the temperature of the closed chamber 1.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a closed chamber of adjustable volume, includes closed chamber (1), its characterized in that: the gas sampling device is characterized in that a gas compensation device (2) for carrying out gas volume compensation on the inside of the closed chamber (1) in the gas sampling process is arranged on the closed chamber (1), the gas compensation device (2) is arranged on one surface or multiple surfaces of the closed chamber (1), the gas compensation device (2) comprises a pore plate (3), a pressing plate (4), a driving device (5) and an elastic membrane (6), the pore plate (3) is arranged on any one surface or multiple surfaces of the closed chamber (1), the elastic membrane (6) is arranged on the outer side surface of the corresponding pore plate (3) and can expand or contract relative to the inside of the closed chamber (1), the pressing plate (4) is arranged on the outer side surface of the corresponding elastic membrane (6), and the driving device (5) is in transmission connection with the corresponding pressing plate (4) so as to drive the front and back movement of the pressing plate (4) to press the elastic membrane (6) to be in contact with the pore plate (3).
2. The volume-adjustable enclosure of claim 1, wherein: the drive device (5) is configured as an electric or manual drive device.
3. The volume-adjustable enclosure of claim 1, wherein: the outer cover of the closed chamber (1) is provided with a temperature-adjusting or humidity-adjusting jacket (7), and the temperature-adjusting or humidity-adjusting jacket (7) is provided with a temperature-controlling or humidity-controlling unit.
4. A closed chamber of adjustable volume according to claim 3, wherein: the temperature regulation control unit (8) is arranged inside or outside the closed chamber (1), and a closed cabin door (15) is arranged on the closed chamber.
5. The volume-adjustable enclosure of claim 1, wherein: a stirring fan (9) is arranged in the closed chamber (1).
6. The volume-adjustable enclosure of claim 4, wherein: the airtight chamber (1) is connected with an exhaust pipeline (10), and a scavenging valve (11) is arranged on the exhaust pipeline (10).
7. The volume-adjustable enclosure of claim 6, wherein: the closed chamber (1) is connected with an air inlet pipeline (12), and an air inlet flowmeter (13) or/and an air inlet valve (14) are arranged on the air inlet pipeline (12).
8. A control method for the volume-adjustable evaporation containment chamber of claim 7, comprising the steps of:
1) Keeping a closed cabin door of the closed chamber closed, opening a ventilation valve, adjusting a temperature control or humidity control unit of a temperature-adjusting or humidity-adjusting jacket, and adjusting a temperature-adjusting control unit in the closed chamber to enable the temperature in the closed chamber to reach t1;
2) The driving device starts to move, the elastic membrane is driven to be pressed with the pore plate, the ventilation valve is closed, the ventilation valve (11) is closed, and at the moment, the internal volume of the closed chamber (1) is the geometric volume of the closed chamber (1);
3) The driving device (5) resets, the internal temperature of the closed chamber (1) is increased to t2, the air in the closed chamber (1) expands, the elastic membrane (3) expands and swells, and at the moment, the volume of the closed chamber (1) is as follows: ((273+t2)/(273+t1)). Geometric volume of the closed chamber, thereby obtaining the volume of the closed chamber (1) at t2 temperature;
4) The temperature inside the closed chamber is raised again to t3, and the volume of the closed chamber is: ((273+t3)/(273+t1)). The geometric volume of the closed chamber, thereby obtaining the volume of the closed chamber at t3 temperature.
9. A control method for the volume-adjustable evaporation containment chamber of claim 7, comprising the steps of:
1) Keeping a closed cabin door of the closed chamber closed, opening a ventilation valve, adjusting a temperature control or humidity control unit of a temperature-adjusting or humidity-adjusting jacket, and adjusting a temperature-adjusting control unit in the closed chamber to enable the temperature in the closed chamber to reach t1;
2) The driving device starts to move, the elastic membrane is driven to be pressed with the pore plate, the ventilation valve is closed, the ventilation valve (11) is closed, and at the moment, the internal volume of the closed chamber (1) is the geometric volume of the closed chamber (1);
3) Resetting the driving device, opening an air inlet valve, introducing clean gas into the closed chamber through an air inlet pipeline and an air inlet flowmeter, wherein the volume of the introduced gas is V1, expanding air in the closed chamber, and expanding the elastic membrane, wherein the volume of the closed chamber is V1 < + > and the geometric volume of the closed chamber;
4) And (3) adjusting a temperature control or humidity control unit of the temperature-adjusting or humidity-adjusting jacket to enable the temperature inside the closed chamber to rise or fall to t2, expanding or contracting air inside the closed chamber, and expanding or contracting the elastic membrane, wherein the volume of the closed chamber is (V1 + the geometric volume of the closed chamber) (273 + t 2)/(273 + t 1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682195.0A CN108594915B (en) | 2018-06-27 | 2018-06-27 | Volume-adjustable closed chamber and control method |
| PCT/CN2019/086529 WO2020001177A1 (en) | 2018-06-27 | 2019-05-13 | Sealed chamber having adjustable volume and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682195.0A CN108594915B (en) | 2018-06-27 | 2018-06-27 | Volume-adjustable closed chamber and control method |
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| Publication Number | Publication Date |
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| CN108594915A CN108594915A (en) | 2018-09-28 |
| CN108594915B true CN108594915B (en) | 2023-08-29 |
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| CN201810682195.0A Active CN108594915B (en) | 2018-06-27 | 2018-06-27 | Volume-adjustable closed chamber and control method |
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| CN (1) | CN108594915B (en) |
| WO (1) | WO2020001177A1 (en) |
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| CN111637268B (en) * | 2020-06-12 | 2022-10-14 | 国网重庆市电力公司检修分公司 | Multi-component dynamic gas distribution device and gas distribution method thereof |
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| WO2020001177A1 (en) | 2020-01-02 |
| CN108594915A (en) | 2018-09-28 |
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