CN211347314U - Air port resistance measuring device - Google Patents
Air port resistance measuring device Download PDFInfo
- Publication number
- CN211347314U CN211347314U CN201922109697.7U CN201922109697U CN211347314U CN 211347314 U CN211347314 U CN 211347314U CN 201922109697 U CN201922109697 U CN 201922109697U CN 211347314 U CN211347314 U CN 211347314U
- Authority
- CN
- China
- Prior art keywords
- section
- air
- measuring
- pressure
- air volume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to a wind gap resistance measurement device relates to wind gap resistance performance measurement technical field. The device comprises a fan section, an air quantity measuring section, a rectifying section, a pressure measuring section, a natural ventilator and an upper computer. The fan section is internally provided with a variable frequency fan. The air volume measuring section comprises an air volume measuring part and a corresponding sensor which are connected with an upper computer, and comprises a pressure difference-air volume curve and resistance performance parameters which are calculated, controlled and output by the device. And the upper cover plates of the air pipes of the rectifying section and the pressure measuring section are adjusted according to the height of the air inlet of the ventilator. The soft flow equalizing plate at the inlet of the rectifying section is folded according to the height of the air pipe. The utility model discloses can measure the natural ventilator resistance performance parameter of different height specifications quantitatively, solve current wind gap resistance measuring device and repack the degree of difficulty when measuring natural ventilator big, problem with high costs, help the mechanism that needs detect accurate, measure the resistance performance of natural ventilator conveniently to serve product lectotype and architectural design.
Description
Technical Field
The utility model relates to a wind gap resistance capability measures technical field, specifically indicates a wind gap resistance measuring device.
Background art:
as an emerging natural ventilation solution, the natural ventilator overcomes the defects of the traditional openable fan in safety and facade design, and is increasingly popularized in high-rise public buildings. The natural ventilators are generally arranged in an aluminum alloy transverse frame of the curtain wall, and the number and the installation positions of the ventilators can be freely adjusted at intervals through the curtain wall so as to ensure the airflow organization and the air quality of indoor air; the natural ventilator has the performances of wind pressure resistance, water tightness, air tightness, sound insulation, filtration and the like, can be arranged at the interval of the curtain wall, does not damage the original vertical face of the building, and ensures the integrity of the design of the high-rise building. The natural ventilator has various structures, complex forms and various specifications and sizes. If the hidden frame natural ventilator is specially designed for the hidden frame curtain wall, the smoothness of the outer surface of the hidden frame natural ventilator can be better integrated with the curtain wall, and the building appearance is not influenced; the vertical natural ventilator is combined with the vertical beam, and the installation length of a single ventilator is generally the height of a floor; the air channel preset type natural ventilator is characterized in that the installation position of the ventilator and an air channel for connecting indoor air and outdoor air are designed in advance when a curtain wall is designed, and the ventilator can be effectively combined with indoor decoration, so that the ventilator is integrated into an indoor environment; the ventilator is directly exposed to the outdoor ventilator, the series of ventilators are large in size and high in height of more than 100mm, and the ventilator is suitable for scenes needing a large amount of fresh air.
According to the specification of 'ventilator for building door and window' JG/T233-3The air volume was measured by the method of air distributor Performance test JG/T20-1999. In order to adapt to different scenes and different outer vertical surface forms, the natural ventilator has complex and various structures. On the one hand, the differential pressure of 10Pa is a relatively small value, most of the existing measurements for conventional mechanical ventilation tuyeresThe designed wind pressure difference of the device is large, so that the device is not suitable for measurement of a natural ventilator; on the other hand, the natural ventilator needs to be matched with the design of the forms of building beams, plates, curtain walls and the like, and has various specifications and sizes, unlike the conventional air conditioner air port which has more standard sizes. The natural ventilator is generally flat and long, the standard measurement width of the ventilation quantity specified in ventilator for building doors and windows JG/T233-2017 is 1m, and the height of the air inlet is 50 mm-200 mm. When a set of ventilators with different heights need to be subjected to resistance characteristic measurement, the traditional tuyere resistance measurement is difficult to refit and high in refit cost. In all these respects, these characteristics make the measuring device for the conventional mechanical ventilation tuyere unsuitable for measurement of a natural ventilator, and also pose certain challenges to the measurement of the air volume of the natural ventilator.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough with the disappearance that overcomes prior art existence, has provided a wind gap resistance measuring device, solves conventional ventilation measuring device's design pressure differential and tuber pipe specification and is not applicable to the current situation that natural ventilator measured.
The resistance measuring device of conventional wind gap often is the size of a fixed size's measuring device cooperation measured wind gap after reducing pipe and rectification tuber pipe repacking, this one side because the length and the width of conventional wind gap do not have definite value, can't build fixed size's device, and on the other hand the specification of conventional wind gap has the unified standard of marketization, and measuring device can satisfy measurement requirement through the secondary repacking generally.
The utility model provides an air port resistance measuring device its characteristics are measurable quantity appointed width (as 1m of standard regulation), the resistance of the natural ventilator of arbitrary height, and need not carry out the secondary reducing. The calculation module of the device calculates the resistance coefficient and the opening flow coefficient of the natural ventilator to be measured, and the flow reduction coefficient caused by the resistance component, records and generates a pressure difference-air volume performance curve, and is beneficial to evaluating the resistance characteristic and the ventilation performance of the natural ventilator, thereby guiding the practical application of the natural ventilator.
The utility model relates to a wind gap resistance measuring device, including several parts of fan section, amount of wind measurement section, rectification section, pressure measurement section, surveyed natural ventilator and host computer.
The air quantity measuring section is connected with the rectifying section in a diameter-variable sealing way and can be welded; the rectification section and the pressure measuring section form an integral air pipe; the pressure measuring section is connected with the tested ventilator by a flange and can be detached.
A variable frequency fan is arranged in the fan section, and the air supply quantity can be adjusted according to needs.
The air quantity measuring section is used for measuring the air quantity and comprises an air quantity measuring component and a corresponding sensor; the air volume measuring component is a pitot tube or a pore plate flowmeter or a nozzle flowmeter.
The flow equalizing plate with uniform gaps is arranged between the air quantity measuring section and the rectifying section and used for promoting the uniform distribution of air flow, in order to adapt to the change of the height of the air pipe, the flow equalizing plate is made of soft porous materials, one end of the flow equalizing plate is connected with the top of the air pipe, and the other end of the flow equalizing plate can be folded at the bottom of the air pipe to be close to the direction of the air quantity measuring section according. The distance between the flow equalizing plate and the natural ventilator to be measured needs to be more than 3 times of the equivalent diameter of the air pipe.
The rectifying section has the function of fully developing airflow in the pipe section, and avoids the phenomena of vortex generation, unstable pressure and the like.
The pressure measuring section is provided with a static pressure ring at the equivalent diameter of the air pipe which is about 1.5 times of the air inlet of the natural ventilator to be measured, namely, a plurality of static pressure small holes are uniformly arranged on the wall of the air pipe and are connected in parallel to form the pressure measuring ring, the positive pressure end of the micro differential pressure meter is connected with the measuring surface where the static pressure ring is arranged, and the negative pressure end is connected with the outside atmosphere of the device.
The air quantity measuring sensor, the micro differential pressure gauge and the variable frequency controller of the variable frequency fan are connected with an upper computer.
As the above, the utility model relates to a natural ventilator's amount of wind measuring method to ventilator resistance coefficient, the air volume under the rated pressure difference measure the index as ventilator ventilation performance is good and bad jointly, compensate on the market to the not enough and defect such as the letter of adoption of the understanding of ventilator amount of wind measurement. The device can quantitatively measure the performance parameters of the ventilator under a relative standard working condition, thereby facilitating measurement of the actual operation effect of the ventilator.
Drawings
FIG. 1 is a schematic view of the structural connection of a tuyere resistance measuring device of the present invention;
fig. 2 is the embodiment of the utility model provides a host computer and fan variable frequency controller, amount of wind measuring transducer and differential pressure gauge's connection schematic diagram.
Description of reference numerals
1: a fan section;
2: an air quantity measuring section;
3: a rectifying section;
4: a pressure measuring section;
5: a natural ventilator.
Detailed Description
The invention will be further described with reference to the following figures and examples
The utility model relates to a wind gap resistance measuring device (as shown in figure 1).
A resistance measuring device of a natural ventilator comprises a fan section 1, an air quantity measuring section 2, a rectifying section 3, a pressure measuring section 4, a natural ventilator 5 and an upper mechanism.
The fan section 1 is provided with a variable frequency fan which can adjust the air supply volume according to the requirement.
The fan section 1 is connected with the air volume measuring section 2 through reducing sealing.
And an air volume measuring part and a corresponding sensor are arranged in the air volume measuring section 2, and the air volume measuring part is a pitot tube or a pore plate flowmeter or a nozzle flowmeter.
A flow equalizing plate for promoting uniform distribution of air flow and uniform gap is arranged between the air quantity measuring section 2 and the rectifying section 3; the distance between the flow equalizing plate and the pressure measuring section 4 is more than 3 times of the equivalent diameter of the air pipe; the flow equalizing plate is made of soft porous materials and is folded or unfolded according to the height change of the air pipe, and the folded end is positioned in the direction close to the air volume measuring section.
The pressure measuring section 4 is provided with a static pressure ring at the equivalent diameter of the air pipe which is about 1.5 times of the air inlet of the natural ventilator 5 to be measured, namely, a plurality of static pressure small holes are uniformly arranged on the wall of the air pipe and are connected in parallel to form the pressure measuring ring, the positive pressure end of the micro differential pressure meter is connected with the measuring surface where the static pressure ring is arranged, and the negative pressure end is connected with the outside atmosphere of the measuring device.
An upper cover plate of the flat air pipe consisting of the rectifying section 3 and the pressure measuring section 4 is movable, and other surfaces are fixedly installed and sealed; powerful magnets and resilient sealing strips are arranged on the periphery of the movable cover plate, powerful magnets corresponding to the positions of the magnets of the movable cover plate are also arranged on the outer side of the air pipe, and the positions of the magnets are moved according to the height of an air inlet of the ventilator to be measured, so that the device can measure natural ventilators with different height specifications.
The air quantity measuring sensor, the micro differential pressure sensor and the variable frequency controller of the variable frequency fan are connected with an upper computer (as shown in figure 2).
Setting an air volume value and an air volume control error (such as +/-1-10%) before measurement through the upper computer, controlling the fan frequency of the fan section according to the set air volume value, feeding back and adjusting the fan frequency according to the air volume value measured by the air volume measuring section, and when the set air volume value and the actually measured air volume value are within the set air volume control error range, enabling the air volume of the device to reach a stable level for data recording and analysis. The upper computer records the current air quantity value and the corresponding pressure difference, generates corresponding pressure difference-flow characteristic curves under different air quantities according to a plurality of groups of measuring results, and calculates the resistance coefficient, the opening flow coefficient and the air quantity reduction coefficient caused by the resistance component of the measured natural ventilator, wherein the calculation formula is as follows:
wherein ξ is the local resistance coefficient of natural ventilator, PsIs a static pressure measurement, Pa; pvIs dynamic pressure, Pa; ptFull pressure, Pa; q. q.svThe measured ventilation, m, under the same experimental conditions3/h；AdIs the cross-sectional area of the air duct, m2；CdIs an open flow coefficient, lambda is a flow reduction coefficient caused by a resistance member, CdsThe open flow coefficient in the presence of a resistance element; cdoThe open flow coefficient in the absence of a resistance element.
To sum up, in view of natural ventilator a great variety, the specification is various, the utility model provides an air port resistance measurement method, measurable quantity designated width (as 1m), the natural ventilator of co-altitude can be quantitatively measured the performance parameter of natural ventilator under a relative standard operating mode, is convenient for measure the actual operation effect of natural ventilator. The utility model discloses a performance detection of natural ventilator provides new method and thinking, helps the mechanism that needs detected or individual accurate, detect natural ventilator's resistance characteristic and ventilation capacity conveniently to serve product lectotype and architectural design.
Claims (5)
1. A tuyere resistance measuring device is characterized by comprising a fan section (1), an air quantity measuring section (2), a rectifying section (3), a pressure measuring section (4), a natural ventilator (5) and an upper mechanism;
the fan section (1) is connected with the air volume measuring section (2) through reducing sealing;
a flow equalizing plate which promotes uniform distribution of air flow and uniform gaps is arranged between the air volume measuring section (2) and the rectifying section (3), and the distance between the flow equalizing plate and the pressure measuring section (4) is more than 3 times of the equivalent diameter of the air pipe;
the air volume measuring section (2) comprises an air volume measuring component and a corresponding air volume measuring sensor;
the air volume measuring part is a pitot tube or a pore plate flowmeter or a nozzle flowmeter;
the pressure measuring section (4) is provided with a static pressure ring at the equivalent diameter of the air pipe which is about 1.5 times of the air inlet of the natural ventilator (5), namely, a plurality of static pressure small holes are uniformly arranged on the wall of the air pipe and are connected in parallel to form the pressure measuring ring, the positive pressure end of the micro differential pressure meter is connected with the measuring surface where the static pressure ring is arranged, and the negative pressure section is connected with the outside atmosphere of the device.
2. The tuyere resistance measuring device according to claim 1, wherein a movable cover plate of a flat air pipe composed of the rectifying section (3) and the pressure measuring section (4) is fixedly installed on the other side;
the movable cover plate is used for adapting to the height change of an air inlet of the natural ventilator to be tested, strong magnets and reboundable sealing strips are arranged on the periphery of the movable cover plate, strong magnets corresponding to the positions of the magnets of the movable cover plate are also arranged on the outer side of the air pipe, and the positions of the magnets are adjusted according to the height of the air inlet of the natural ventilator (5).
3. The tuyere resistance measuring device according to claim 1, wherein a variable frequency fan is provided in the fan section (1) to adjust the amount of air supply as required.
4. The tuyere resistance measuring device of claim 3, wherein the upper computer is connected with a variable frequency controller of the variable frequency fan, the air volume measuring sensor and the differential pressure gauge.
5. The tuyere resistance measuring device of claim 1, wherein the flow equalizing plate is made of a soft porous material, and is folded or unfolded according to the height change of the air duct, and the folded end is located in a direction close to the air volume measuring section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922109697.7U CN211347314U (en) | 2019-11-29 | 2019-11-29 | Air port resistance measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922109697.7U CN211347314U (en) | 2019-11-29 | 2019-11-29 | Air port resistance measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211347314U true CN211347314U (en) | 2020-08-25 |
Family
ID=72090241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922109697.7U Active CN211347314U (en) | 2019-11-29 | 2019-11-29 | Air port resistance measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211347314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045713A (en) * | 2022-07-26 | 2022-09-13 | 淮南矿业(集团)有限责任公司 | Mine ventilation resistance monitoring system and monitoring method |
-
2019
- 2019-11-29 CN CN201922109697.7U patent/CN211347314U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045713A (en) * | 2022-07-26 | 2022-09-13 | 淮南矿业(集团)有限责任公司 | Mine ventilation resistance monitoring system and monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110849578A (en) | Resistance measuring device of natural ventilator | |
| Ohba et al. | Study on airflow characteristics inside and outside a cross-ventilation model, and ventilation flow rates using wind tunnel experiments | |
| CN107966254A (en) | Air-tightness detection method in a kind of residential housing room | |
| CN105301050A (en) | Large-scale light-transmitting enclosure structure heat transfer coefficient detection equipment and method | |
| McWilliams | Review of air flow measurement techniques | |
| CN103335773B (en) | Pipeline gas pressure measuring device | |
| US4517826A (en) | Apparatus and method for determining the air leakage characteristics of a structure | |
| CN102519703B (en) | Air terminal air volume balance detection analog device and analog detecting method thereof | |
| CN209280050U (en) | A kind of apparatus for measuring air quantity and its system for testing exhaust uptake resistance and inleakage | |
| Chu et al. | The loss factors of building openings for wind-driven ventilation | |
| CN206787779U (en) | A kind of live external window air tightness detection means | |
| Fisk et al. | Duct systems in large commercial buildings: physical characterization, air leakage, and heat conduction gains | |
| CN211347314U (en) | Air port resistance measuring device | |
| Yang et al. | Research on flow resistance characteristics with different window/door opening angles | |
| CN217358930U (en) | Air resistance detection device of gas filter | |
| CA1178826A (en) | Orifice metering fan device | |
| CN202885180U (en) | Air inlet measurement device for variable air rate air conditioning system | |
| True et al. | Wind driven cross-flow analysed as a catchment problem and as a pressure driven flow | |
| US4631876A (en) | Orifice metering fan device | |
| Hsu et al. | Review of wind effect on measurement of building airtightness | |
| CN205280631U (en) | Large -scale printing opacity envelope coefficient of heat transfer check out test set | |
| CN2286314Y (en) | Arrangement for testing physical property of door & window out of building | |
| US7007740B2 (en) | Adjustable flow heat recovery ventilator and method | |
| Iqbal et al. | Effect of opening the sash of a centre-pivot roof window on wind pressure coefficients | |
| Igarashi et al. | The effects of an air conditioning system using the coanda effect on an indoor office environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |