CN110044446A - A kind of air quantity calibration system - Google Patents
A kind of air quantity calibration system Download PDFInfo
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- CN110044446A CN110044446A CN201910270983.3A CN201910270983A CN110044446A CN 110044446 A CN110044446 A CN 110044446A CN 201910270983 A CN201910270983 A CN 201910270983A CN 110044446 A CN110044446 A CN 110044446A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
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Abstract
The present invention relates to calibration field, in particular to a kind of air quantity calibration systems.Air quantity calibration system includes air quantity pipeline, the first sensing mould group, pressure difference sensing mould group, air quantity adjusting mould group, controller and nozzle flowmeter mould group；Nozzle flowmeter mould group is arranged in air quantity pipeline, and the first end of air quantity pipeline is provided with air inlet, and the second end of air quantity pipeline is provided with air outlet；Air quantity adjusts mould group and is arranged in air inlet；Wherein pressure difference sensing mould group is used to measure the first pressure difference of nozzle ends in nozzle flowmeter mould group；First sensing mould group is used to measure the first measurement set in air quantity pipeline；Controller is used to adjust mould group according to the first pressure difference and the first measurement set regulation air quantity, and the air quantity in air quantity pipeline is made to reach the first default airflow value.Controller can make the ventilation quantity in ventilation shaft more accurately reach the first default airflow value, improve the calibration accuracy of air quantity calibration system according to the ventilation quantity of a standard automatic adjustment ventilation shaft.
Description
Technical field
The present invention relates to calibration field, in particular to a kind of air quantity calibration systems.
Background technique
With the sustainable development of Chinese national economy and economic structure in-depth transition, increasingly sent out to green energy conservation direction
Exhibition, Heating,Ventilating and Air Conditioning, purification techniques monitor air quantity, measure, calibration and on-line monitoring aspect demand are higher and higher, accurate HVAC
Air-supply can be only achieved more low energy consumption, achieve energy-saving and emission reduction purposes.
Device just because of the measurement air quantity such as Air Flow Rate Instrument, anemobiagraph is easy to carry, in recent years the air measurings such as Air Flow Rate Instrument
Device gets up in China's rapid proliferation, and application field is also gradually expanded.
The currently marketed self-checking device specifically for apparatus for measuring air quantity such as Air Flow Rate Instruments, typically original
Flow conduit on increase the modes such as converting interface and calibrate, calibrate pipeline without special air quantity, and flow conduit is typically all to adopt
With turbine flowmeter or Roots type flowmeter, flow measurement range relatively narrower, general flow rate upper limit is at 3500 cubic metres per small
When, at this point, the pressure nearly 8000 that flowmeter is subject to, and crushing is larger, can not cover the apparatus for measuring air quantity such as current air volume instrument
Measurement range, current measurement range are generally 40~5000 cubic metres per hour, and the calibration accuracy of air quantity calibration system is low.
Summary of the invention
The present invention is to solve the technical issues of improving the calibration accuracy of air quantity calibration system.
In order to solve the above technical problems, the invention discloses a kind of air quantity calibration systems.Air quantity calibration system includes air quantity
Pipeline, air quantity adjust mould group, nozzle flowmeter mould group, pressure difference sensing mould group, the first sensing mould group and controller；
The first end of the air quantity pipeline is provided with air inlet, and the second end of the air quantity pipeline is provided with air outlet, institute
It states air quantity and adjusts the setting of mould group in the air inlet, the nozzle flowmeter mould group is arranged in the air quantity pipeline；
The pressure difference sensing mould group is connect with the nozzle flowmeter mould group, and the pressure difference sensing mould group is described for measuring
First pressure difference of nozzle ends in nozzle flowmeter mould group；
The measurement end of the first sensing mould group is arranged in the air quantity pipeline, and the first sensing mould group is for measuring
The first measurement set in the air quantity pipeline, wherein first measurement set includes temperature in the air quantity pipeline, wet
Degree and barometric information；
The air quantity adjusts mould group, pressure difference sensing mould group and the first sensing Mo Zu and connects respectively in the controller
It connects；
The air quantity adjusts mould group, pressure difference sensing mould group and the first sensing Mo Zu and connects respectively in the controller
It connects；
The controller, which is used to regulate and control the air quantity according to first pressure difference and first measurement set, adjusts mould
Group, so that the air quantity in the air quantity pipeline reaches the first default airflow value.
Optionally, the first sensing mould group includes temperature sensing mould group, the gentle pressure sensitivity survey mould group of humidity mould group；
The air inlet and the nozzle stream in the air quantity pipeline is arranged in the measurement end of the temperature sensing mould group
Between meter mould group, the temperature sensing mould group is used to measure first between the air inlet and the nozzle flowmeter mould group
Temperature value；
The air inlet and the nozzle stream in the air quantity pipeline is arranged in the measurement end of the humidity mould group
Between meter mould group, the humidity mould group is used to measure first between the air inlet and the nozzle flowmeter mould group
Humidity value；
The air inlet and the nozzle flow is arranged in the air quantity pipeline in the measurement end of the air pressure sensing mould group
It counts between mould group, the air pressure sensing mould group is used to measure the first gas between the air inlet and the nozzle flowmeter mould group
Pressure value.
Optionally, the controller is used to calculate first according to first measurement set and first pressure difference real
Border airflow value, and the air quantity is regulated and controled according to the first actual air volume value and adjusts mould group.
Optionally, the middle part of the air quantity pipeline, the nozzle flowmeter mould group is arranged in the nozzle flowmeter mould group
Nozzle including at least one size, the nozzle are disposed side by side in the air quantity pipeline 1, and the controller is for controlling
The nozzle of pressure difference sensing mould group selection a certain kind size and the first sensing pressure difference for measuring its both ends.
Optionally, the both ends of the nozzle are provided with valve, and the controller is connect with the nozzle, the controller
Control the opening and closing of the valve of all nozzles of the nozzle flowmeter mould group.
Optionally, the pressure difference sensing mould group is connect with the nozzle, and the controller and pressure difference sensing mould group connect
It connects, the controller controls pressure difference sensing mould group and only selects the described of a certain size in the nozzle flowmeter mould group
Nozzle and the first sensing pressure difference for measuring its both ends.
Optionally, an equal drift net is at least set in the air quantity pipeline.
Optionally, the first equal drift net and the second equal drift net, the first equal drift net setting are provided in the air quantity pipeline
Between the air inlet and the first sensing mould group, the second equal drift net setting is in the first sensing mould group and described
Between nozzle flowmeter mould group.
Optionally, the air outlet of the air quantity pipeline is arranged in the air measuring mould group, and the air measuring mould group is surveyed
Measure the second air measuring value in the air quantity pipeline；
Wherein, the controller is for recording shown first actual air volume value and second air measuring value, and records
First air quantity error amount of the first actual air volume value and the first measurement airflow value.
Optionally, the air measuring mould group includes Air Flow Rate Instrument and Air Flow Rate Instrument data collection system, the Air Flow Rate Instrument and institute
The electrical connection of Air Flow Rate Instrument data collection system is stated, the controller is electrically connected with the Air Flow Rate Instrument data collection system.
By adopting the above technical scheme, of the present invention to have the following beneficial effects:
Air quantity calibration system includes air quantity pipeline, the first sensing mould group, pressure difference sensing mould group, air quantity adjusting mould group, control
Device and nozzle flowmeter mould group；The controller is used for according to first pressure difference and first measurement set regulation
Air quantity adjusts mould group, wherein first pressure difference is to spray in the pressure difference sensing mould group measurement nozzle flowmeter mould group
The data at mouth both ends, first measurement set is temperature, humidity and the barometric information in the air quantity pipeline, so that the wind
Air quantity in buret road reaches the first default airflow value；The controller can be with first pressure difference and first measured value
Group is used as a reference standard, constantly calibrates the air output that the air quantity adjusts mould group, improves the calibration of air quantity calibration system
Precision, to realize the effect of accurate alignment.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of air quantity calibration system in one embodiment of the invention；
Fig. 2 is the structural schematic diagram that air measuring mould group is had in Fig. 1；
Fig. 3 is the flow diagram of the calibration method of the air quantity calibration system in Fig. 1；
Fig. 4 is the flow diagram of the calibration method of the air quantity calibration system in Fig. 2；
It remarks additionally below to attached drawing:
1- air quantity pipeline；2- controller；3- air quantity adjusts mould group；4- nozzle flowmeter mould group；5- pressure difference senses mould group；6-
First sensing mould group；The equal drift net of 7-；8- air measuring mould group.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
" one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one implementation of the invention
A particular feature, structure, or characteristic.In the description of the present invention, it is to be understood that, term " on ", "lower", "top", "bottom" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can be expressed or what is implied includes one or more of the features.Moreover, term " first ",
" second " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that in this way
The data used are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein is used in addition to scheming herein
Sequence other than those of showing or describe is implemented.
Embodiment:
As shown in Figure 1, a kind of air quantity calibration system includes air quantity pipeline 1, air quantity adjusting mould group 3, nozzle flowmeter mould group
4, pressure difference sensing mould group 5, first senses mould group 6 and controller 2；
The first end of the air quantity pipeline 1 is provided with air inlet, and the second end of the air quantity pipeline 1 is provided with air outlet,
The air quantity adjusts the setting of mould group 3 in the air inlet, and the nozzle flowmeter mould group 4 is arranged in the air quantity pipeline 1；
The air inlet is oppositely arranged with the air outlet, and in some embodiments, the air quantity pipeline is linear type, C
Type, L-type etc.；
The pressure difference sensing mould group 5 is connect with the nozzle flowmeter mould group 4, and the pressure difference sensing mould group 5 is for measuring
First pressure difference of nozzle ends in the nozzle flowmeter mould group 4；
The measurement end of the first sensing mould group 6 is arranged in the air quantity pipeline 1, and the first sensing mould group 6 is used for
Measure the first measurement set in the air quantity pipeline 1, wherein first measurement set includes in the air quantity pipeline 1
Temperature, humidity and barometric information；
The air quantity adjust mould group 3, the first sensing mould group 6, pressure difference sensing mould group 5 respectively with the controller
2 connections；
The controller 2, which is used to regulate and control the air quantity according to first pressure difference and first measurement set, adjusts mould
Group 3, so that the air quantity in the air quantity pipeline reaches the first default airflow value.
The controller can be using first pressure difference and first measurement set as a reference standard, continuous school
The quasi- air quantity adjusts the air output of mould group, the calibration accuracy of air quantity calibration system is improved, to realize the effect of accurate alignment
Fruit.
In some embodiments, it includes adjustable speed fan that the air quantity, which is adjusted in mould group 3, and the adjustable speed fan can be according to institute
The instruction of controller is stated to change the revolving speed of blower；The adjustable speed fan is frequency controlling fan in some embodiments.
In some embodiments, it includes Fan Regulation valve in mould group 3 that the air quantity, which is adjusted, described in the controller control
The aperture of Fan Regulation valve, to control blower towards the air force in the air quantity pipeline.
In some embodiments, first sensing mould group (6) includes temperature sensing mould group, humidity mould group and air pressure
Sense mould group；
The air inlet and the nozzle stream in the air quantity pipeline is arranged in the measurement end of the temperature sensing mould group
Between meter mould group (4), the temperature sensing mould group is for measuring between the air inlet and the nozzle flowmeter mould group (4)
The first temperature value；
The air inlet and the nozzle that the measurement end of the humidity mould group is arranged in the air quantity pipeline (1)
Between flowmeter mould group (4), the humidity mould group for measure the air inlet and the nozzle flowmeter mould group (4) it
Between the first humidity value；
The air inlet and the nozzle stream is arranged in the air quantity pipeline (1) in the measurement end of the air pressure sensing mould group
Between meter mould group (4), the air pressure sensing mould group is for measuring between the air inlet and the nozzle flowmeter mould group (4)
The first atmospheric pressure value.
In some embodiments, the side wall setting that the measurement end of the temperature sensing mould group passes through the air quantity pipeline 1 exists
In the air quantity pipeline 1, the side wall that the measurement end of the humidity mould group passes through the air quantity pipeline 1 is arranged in the air quantity
In pipeline 1, the side wall that the measurement end of the air pressure sensing mould group passes through the air quantity pipeline 1 is arranged in the air quantity pipeline 1.
The controller 2 is used to calculate the first actual air volume according to first measurement set and first pressure difference
Value, and the air quantity is regulated and controled according to the first actual air volume value and adjusts mould group 3.
The first air density values are calculated according to first temperature value, first humidity value, first atmospheric pressure value,
First air density values ρ calculation formula is as follows:
In formula:
T Kelvin's thermometric scale: the first temperature value, K Kelvin；
P pressure: the first atmospheric pressure value, Pa Pascal；
H (humidity): the first humidity value decimally indicates；
K=1Pa.
A=1.2378847 × 10-5K-2；
B=-1.9121316 × 10-2K-1；
C=33.93711047；
D=-6.3431645 × 103K；
Then according to first air density values and the first sensing differential pressure value, the first actual air volume value is calculated；
The calculation formula of first actual air volume value Q are as follows:
In formula
Q: 20 DEG C of flow of system mark condition, 1 standard atmospheric pressure, m3/h
C: efflux coefficient；It is provided by nozzle flowmeter specification
ε: the coefficient of expansion；Here 1.0 are taken
D: nozzle inside diameter, m (rice)
Δ p: nozzle upstream pressure tappings and downstream pressure tappings pressure difference, i.e., the first sensing pressure difference, Pa
ρ0: the atmospheric density under standard state takes 1.205kg/m here3
ρ: the actual air density of nozzle upstream, i.e. the first air density values, kg/m3
In the present embodiment, the nozzle flowmeter mould group 4 includes the nozzle of at least one size, the nozzle flowmeter
The middle part of the air quantity pipeline 1 is arranged in mould group 4, and the nozzle flowmeter mould group 4 includes the nozzle of at least one size, institute
State nozzle and be disposed side by side on the air quantity pipeline 1) in, the controller (2) is for controlling pressure difference sensing mould group (5) selection
The nozzle of a certain size and the first sensing pressure difference for measuring its both ends.
In some embodiments, the both ends of the nozzle in the nozzle flowmeter mould group 4 are provided with valve, described
Controller 2 is connect with the nozzle, and the controller 2 controls opening for the valve of all nozzles of the nozzle flowmeter mould group 4
It opens and closes, according to the first actual air volume value, the controller 2 opens a certain ruler of the nozzle flowmeter mould group 4
The valve of the very little nozzle, then, the pressure difference sensing mould group 5 measure the first sensing pressure difference of its nozzle ends,
The valve that the controller 2 can control the nozzle of the other sizes of the nozzle flowmeter mould group 4 simultaneously is in off state；
In some embodiments, the pressure difference sensing mould group 5 is connect with the nozzle, the controller 2 and the pressure difference
Mould group 5 is sensed to connect, according to the first actual air volume value, the controller 2 control pressure difference sensing mould group 5 select it is described
Described, nozzle and the first sensing pressure difference for measuring its both ends of a certain size in nozzle flowmeter mould group 4, it is described
Controller 2 controls the first sensing pressure difference that the pressure difference sensing mould group 5 does not measure other nozzles of the flowmeter mould group
Value.
In some embodiments, the nozzle of a certain size in the nozzle flowmeter mould group 4 is at least one, can be with
To be multiple, the pressure difference sensing mould group 5 measures the pressure difference of multiple nozzle ends of a certain size, the first sensing pressure difference
Value is the average value of multiple pressure differences, and the controller can calculate the average value of multiple pressure differences.
In some embodiments, the nozzle flowmeter mould group 4 includes the calibrating nozzle of at least one nominal diameter, described
Controller 2 is used to open the calibrating nozzle of respective diameters according to the first actual air volume value, closes the nozzle flowmeter mould
The calibrating nozzle of other nominal diameters in group 4.
The nozzle flowmeter mould group 4 includes two nozzles composition that tolerance internal diameter is 189 millimeters and 100 millimeters, when the
When one actual air volume value is hourly less than 200 cubic metres, the nozzle that tolerance internal diameter is 100 millimeters is opened, is closed in tolerance
Diameter is 189 millimeters of nozzles, and when the first actual air volume value is hourly greater than 200 cubic metres, opening tolerance internal diameter is 189 millis
The nozzle of rice, closing tolerance internal diameter is 100 millimeters of nozzle, the unlatching of all nozzles of the nozzle flowmeter mould group 4 and
It closes and is automatically controlled by shown controller 2.
In the present embodiment, an equal drift net 7 is at least set in the air quantity pipeline 1.
In some embodiments, the first equal drift net and the second equal drift net are provided in the air quantity pipeline 1, described first
Drift net setting is between the air inlet and the first sensing mould group 6, and the second equal drift net setting is in first sensing
Between mould group 6 and the nozzle flowmeter mould group 4.
The air-flow that the equal drift net 7 can be used in the uniform wind burette 1 eliminates stream swirl to the shadow of measurement result
It rings, improves the measurement essence of first temperature value, first humidity value, first atmospheric pressure value and first pressure difference
Degree, to improve the calibration accuracy of air quantity calibration system.
As shown in Fig. 2, in the present embodiment, the air outlet of the air quantity pipeline 1 is arranged in the air measuring mould group 8,
The air measuring mould group 8 measures the second air measuring value in the air quantity pipeline 1.
The controller 2 is used to record shown first actual air volume value and second air measuring value, and described in record
First air quantity error amount of the first actual air volume value and the first measurement airflow value.
In some embodiments, the air measuring mould group 8 includes Air Flow Rate Instrument and Air Flow Rate Instrument data collection system, the wind
Instrument and Air Flow Rate Instrument data collection system electrical connection are measured, the controller 2 is electrically connected with the Air Flow Rate Instrument data collection system.
In some embodiments, the equal drift net of third is provided in the air quantity pipeline 1, the equal drift net of third is arranged in institute
State the air intake of air measuring mould group 8.
In some embodiments, the equal drift net of third is provided in the air quantity pipeline 1, the equal drift net of third is arranged in institute
State the air intake of Air Flow Rate Instrument.
As shown in figure 3, the calibration method of the calibration system includes the following steps: in the present embodiment
Step 31: the air quantity being regulated and controled according to the first default airflow value and adjusts the first air output of output of mould group 3；In this step
In, the controller 2 sets a first default airflow value, and the controller 2 regulates and controls the wind according to the first default airflow value
Amount adjusts mould group 3 and exports the first air output；
Step 32: obtaining the first sensing mould group 6 and measure resulting first measurement set；In this step, it described first surveys
Magnitude group includes that the temperature sensing mould group, the humidity mould group and air pressure sensing Mo Zu measure the air quantity respectively
The first temperature value, the first humidity value and the first atmospheric pressure value in pipeline 1；
Step 33: the first actual air volume value is calculated according to the first sensing value group and first pressure difference；At this
Controller 2 described in step calculates the first actual air volume value according to first temperature, the first humidity and the first air pressure；
Step 34: first outlet air that the air quantity adjusts mould group 3 is regulated and controled according to the first actual air volume value circulation
Amount, makes the first actual air volume value reach the described first default airflow value；
As shown in figure 4, further, step further include:
Step 35: after first air output reaches the default wind value, the air measuring mould group 8 measures the pipe
The first measurement airflow value in road；In this step, the constantly regulation air quantity of controller 2 adjusts mould group 3, makes described first to go out
Air quantity reaches the described first default airflow value；
Step 36: the controller 2 calculates described according to the first actual air volume value and first measured value
First air quantity error amount of one actual air volume value and first measured value.The controller 2 is when one section in this step
Between record the first actual air volume value and first measured value；The controller 2 according to the first actual air volume value and
First measured value calculates the difference of the first actual air volume value and first measured value.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of air quantity calibration system, which is characterized in that adjust mould group (3), nozzle flowmeter including air quantity pipeline (1), air quantity
Mould group (4), pressure difference sensing mould group (5), the first sensing mould group (6) and controller (2)；
The first end of the air quantity pipeline (1) is provided with air inlet, and the second end of the air quantity pipeline (1) is provided with air outlet,
The air quantity adjusts mould group (3) setting in the air inlet, and the nozzle flowmeter mould group (4) is arranged in the air quantity pipeline
(1) in；
Pressure difference sensing mould group (5) is used to measure the first pressure difference of nozzle ends in the nozzle flowmeter mould group (4)；
First sensing mould group (6) is used to measure the first measurement set in the air quantity pipeline (1), wherein described first
Measurement set includes temperature, humidity and the barometric information in the air quantity pipeline (1)；
The air quantity adjusts mould group (3), pressure difference sensing mould group (5) and described first senses mould group (6) respectively at the control
Device (2) connection processed；
The controller (2), which is used to regulate and control the air quantity according to first pressure difference and first measurement set, adjusts mould group
(3), so that the air quantity in the air quantity pipeline reaches the first default airflow value.
2. air quantity calibration system according to claim 1, it is characterised in that: first sensing mould group (6) includes temperature
It senses the gentle pressure sensitivity of mould group, humidity mould group and surveys mould group；
The temperature sensing mould group is used to measure the first temperature between the air inlet and the nozzle flowmeter mould group (4)
Value；
The humidity mould group is used to measure the first humidity between the air inlet and the nozzle flowmeter mould group (4)
Value；
The air pressure sensing mould group is used to measure the first air pressure between the air inlet and the nozzle flowmeter mould group (4)
Value.
3. air quantity calibration system according to claim 2, it is characterised in that: the controller (2) is used for according to described the
One measurement set and first pressure difference calculate the first actual air volume value, and regulate and control institute according to the first actual air volume value
It states air quantity and adjusts mould group (3).
4. air quantity calibration system according to claim 3, it is characterised in that: nozzle flowmeter mould group (4) setting exists
The middle part of the air quantity pipeline (1), the nozzle flowmeter mould group (4) include the nozzle of at least one size, and the nozzle is simultaneously
Row is arranged in the air quantity pipeline (1), and the controller (2) is a certain for controlling pressure difference sensing mould group (5) selection
The nozzle of size and the first sensing pressure difference for measuring its both ends.
5. air quantity calibration system according to claim 4, it is characterised in that: the both ends of the nozzle are provided with valve,
The controller (2) connect with the nozzle, and the controller (2) controls all described of the nozzle flowmeter mould group (4)
The opening and closing of the valve of nozzle.
6. air quantity calibration system according to claim 4, it is characterised in that: pressure difference sensing mould group (5) and the spray
Mouth connection, the controller (2) connect with pressure difference sensing mould group, and the controller controls pressure difference sensing mould group (5)
It only selects the nozzle of a certain size in the nozzle flowmeter mould group (4) and measures first sensing at its both ends
Pressure difference.
7. air quantity calibration system according to claim 4, it is characterised in that: at least setting one in the air quantity pipeline (1)
A equal drift net (7).
8. air quantity calibration system according to claim 7, it is characterised in that: be provided with first in the air quantity pipeline (1)
Equal drift net (7) and the second equal drift net (7), first equal drift net (7) setting is in the air inlet and the first sensing mould group
(6) between, the second equal drift net (7) setting first sensing mould group (6) and the nozzle flowmeter mould group (4) it
Between.
9. according to air quantity calibration system described in any one in claim 3 to 8, air measuring mould group (8) setting
In the air outlet of the air quantity pipeline (1), the air measuring mould group (8) measures the second air quantity in the air quantity pipeline (1)
Measured value；
Wherein, the controller (2) is for recording shown first actual air volume value and second air measuring value, and records institute
State the first air quantity error amount of the first actual air volume value and the first measurement airflow value.
10. air quantity calibration system according to claim 1, it is characterised in that: the air measuring mould group (8) includes air quantity
Instrument and Air Flow Rate Instrument data collection system, the Air Flow Rate Instrument and Air Flow Rate Instrument data collection system electrical connection, the controller (2)
It is electrically connected with the Air Flow Rate Instrument data collection system.
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| CN201910270983.3A CN110044446A (en) | 2019-04-04 | 2019-04-04 | A kind of air quantity calibration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780825A (en) * | 2020-07-01 | 2020-10-16 | 王学义 | Air conditioner refrigeration air output testing device and using method thereof |
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