CN204944814U - A kind of pick-up unit of wind tunnel type fan coil air quantity - Google Patents
A kind of pick-up unit of wind tunnel type fan coil air quantity Download PDFInfo
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- CN204944814U CN204944814U CN201520679090.1U CN201520679090U CN204944814U CN 204944814 U CN204944814 U CN 204944814U CN 201520679090 U CN201520679090 U CN 201520679090U CN 204944814 U CN204944814 U CN 204944814U
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- ventilation duct
- static pressure
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- pressure cabin
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Abstract
For the deficiency of existing pick-up unit, the pick-up unit of a kind of wind tunnel type fan coil of the utility model air quantity, comprises test static pressure cabin, eddy currents air flow sensor, accurate anemoscope, proportional size ventilation duct, quick on-off solenoid valve, static pressure frequency conversion balance blower fan; Advantageous Effects, sensing range of the present utility model is wider, and precision is more accurate, and covering nominal air delivery is 340m
3/ h ~ 2380m
3whole flow fan coil pipes of/h detect specification, avoid adopting conventional detection devices in each test, need to change according to air mass flow difference the preliminary work of different size, varying number nozzle, improve detection efficiency.
Description
Technical field
The utility model belongs to checkout equipment technical field, is specifically related to a kind of pick-up unit of wind tunnel type fan coil air quantity.
Background technology
Modern architecture is the important component part of energy resource consumption, is also the main contents forming buildings use cost simultaneously.Under current energy source increasingly intense situation, building energy conservation has become the high realistic problem of the degree of social concern.Buildings is in normal use procedure, indoor environment consumes a large amount of energy, the heating of current China, ventilation, air-conditioning account for 40% ~ 50% of architectural exterior-protecting construction energy consumption, adopt dim, ventilate, a fundamental element that air conditioner energy saving has become economic development runs through wherein all the time.Fan coil and air-conditioner set are as equipment indispensable in air-conditioning, and its demand increases year by year.Fan coil is as the end prod of air-conditioning, and manufacturing enterprise needs to require to produce satisfactory fan coil according to design parameter, and the examining report control design index provided according to detection unit during examination carries out accordance examination.Therefore, be the performance that air-conditioner manufacturer or research and design personnel are necessary precisely, measure fan coil units efficiently.
Fig. 4 is the exemplary device of current acoustic wind coiler air quantity, comprises a plenum chamber, is provided with flow nozzle, perforated plate, discharge air chamber in plenum chamber.During use, fan coil is arranged on the afterbody of this device, and detects by standard GB/T/T19232-2003 " fan coil units " regulation:
Although air quantity is at 170m when in " fan coil units ", the fan coil of regulation detects
3/ h ~ 2380m
3/ h; But consider the needs of actual detection, during the detection air quantity of the exemplary device of said determination fan coil air quantity, bound scope needs expansion---should 150m be contained
3/ h ~ 2500m
3/ h flow range.Therefore in this exemplary device air-flow measurement device, at least need design four large small nozzles of difference, according to air flow control, it opens and closes, completes detection.
Due to the needs detected, cause the complex manufacturing technology of this device with four large small nozzles of difference, expensive, inconvenient operation.
In addition, due to the characteristic of air fluid, the fluidised form of air in flow nozzle cavity is unstable, affects each other.In addition, be vented indoor location blower fan and carry out exhausting, and the type selecting of blower fan is comparatively large, further make the air in plenum chamber produce disturbance, thus make the pressure reduction of four nozzles unstable, measure inaccurate.
Utility model content
In order to overcome the indeterminable problem of wind tunnel type fan coil air quantity that existing pick-up unit causes because of structural defect, the utility model provides a kind of pick-up unit of wind tunnel type fan coil air quantity, and its concrete structure is as follows:
A pick-up unit for wind tunnel type fan coil air quantity, comprises static pressure cabin 12, first perforated plate 17 and the second perforated plate 21.Described static pressure cabin 12 is the cylinder of both ends open.The one end in note static pressure cabin 12 is static pressure cabin air inlet, and its other end is static pressure cabin air outlet.In the cavity in static pressure cabin 12, be provided with the first perforated plate 17 and the second perforated plate 21, wherein, the first perforated plate 17 is near static pressure cabin air inlet, and the second perforated plate 21 is near static pressure cabin air outlet.In addition:
By fixed support 13, first stopple coupon 14 is linked together with the outer wall in the static pressure cabin 12 near static pressure cabin air inlet.Described first stopple coupon 14 is hollow tube.One end of first stopple coupon 14 is connected with the first air inlet sampling blower fan 16.The other end of the first stopple coupon 14 is adjacent with static pressure cabin air inlet.The pipe shaft of the first stopple coupon 14 is provided with inlet air dry-bulb temperature sensor 15.
The barrel in static pressure cabin 12 is provided with the second stopple coupon 20.Described second stopple coupon 20 is hollow tube.The intracavity inter-connection in the second stopple coupon 20 and static pressure cabin 12.Second stopple coupon 20 is provided with test section air dry-bulb temperature sensor 18 and the second sampling blower fan 19.
The barrel in static pressure cabin 12 is provided with blast pressure measurement ring 11.Described blast pressure measurement ring 11 is circular, and hollow.Between blast pressure measurement ring 11 and static pressure cabin bulkhead 26, be provided with static pressure tapping 22, namely blast pressure measurement ring 11 communicates with static pressure cabin 12.Blast pressure measurement ring 11 is provided with microbarograph 24.
The static pressure cabin air outlet in static pressure cabin 12 is connected with outlet air mixing chamber 23.Described outlet air mixing chamber 23 is the rectangular block of hollow.
Outlet air mixing chamber 23 is provided with large ventilation duct and little ventilation duct.Large ventilation duct is provided with large discharge quick on-off solenoid valve 9, large discharge eddy currents air flow sensor 3 successively.Little ventilation duct is provided with low discharge quick on-off solenoid valve 10, accurate anemoscope 4, low discharge eddy currents air flow sensor 2 successively.The end of large ventilation duct, the end of little large ventilation duct balance blower fan 1 jointly air inlet with static pressure frequency conversion is connected.
useful technique effect
The utility model adopts static pressure frequency conversion balance blower fan away from plenum chamber, avoids interference the blast pressure measurement ring of plenum chamber, ensures that pressure measurement is accurate, meet detection system high-precision requirement.Adopt two calibers become fixed proportion be 2: 1 ventilation duct, 10 times of calibers are not less than according to flowmeter or anemoscope at front end, the direction straight-line segment of air flow at the straight-line segment of ventilation duct, rear end is not less than 5 times of caliber principles, fixed point place goes out different range DN200, DN100 eddy currents air flow sensor of installation two and accurate anemoscope replaces flow nozzle, scope is wider, precision is more accurate, and covering nominal air delivery is 340m
3/ h ~ 2380m
3whole flow fan coil pipes of/h detect specification, avoid adopting conventional detection devices to need to change according to air mass flow difference the preliminary work of different size, varying number nozzle when testing at every turn, improve detection efficiency.
1, the utility model adopts eddy currents air flow sensor to replace flow nozzle.Vortex shedding flow meter is measured air mass flow scope and is more suitable for, and solves the preliminary work that each experimental evidence air mass flow difference changes different size, varying number nozzle, improves detection efficiency.
2, the utility model adopts static pressure frequency conversion balance blower fan away from plenum chamber, and the blast pressure measurement ring avoiding interference plenum chamber is measured, and ensures that pressure measurement is accurate, meets detection system to Pressure testing high-precision requirement.
3, the utility model adopts solenoid valve quick on-off, realizes the switching of different air mass flow test, and accurately, strong interference immunity, good stability, accurate anemoscope is less than 200m for testing air mass flow in the little ventilation caliber of low static pressure unit in its test
3the high-acruracy survey of/h.
4. the utility model is avoided using nozzle, and both avoided the technology difficulty of processing four kinds of nozzles, calibration difficulty, and reduced manufacturing cost, the air-flow avoided in addition between nozzle influences each other.
5, blast pressure measurement ring of the present utility model as shown in Figure 3, designs 4 mutual pressure tappings in 90 °, and its mean value is counted in the minute-pressure that communicates with static pressure cabin, and pressure measurement is more accurate.
Accompanying drawing explanation
Fig. 1 is structure diagram of the present utility model.
Fig. 2 is the longitudinal sectional view in static pressure cabin 12 in Fig. 1.
Fig. 3 is the A-A cut-open view in Fig. 2.
Fig. 4 is the structure diagram of existing pick-up unit.
Embodiment
Now be described with reference to the accompanying drawings design feature of the present utility model.
See Fig. 2, a kind of pick-up unit of wind tunnel type fan coil air quantity, comprises static pressure cabin 12, first perforated plate 17 and the second perforated plate 21.Described static pressure cabin 12 is the cylinder of both ends open.The one end in note static pressure cabin 12 is static pressure cabin air inlet, its other end is that static pressure cabin air outlet is provided with the first perforated plate 17 and the second perforated plate 21 in the cavity in static pressure cabin 12, wherein, the first perforated plate 17 is near static pressure cabin air inlet, and the second perforated plate 21 is near static pressure cabin air outlet.In addition:
See Fig. 1, by fixed support 13, first stopple coupon 14 is linked together with the outer wall in the static pressure cabin 12 near static pressure cabin air inlet.Described first stopple coupon 14 is hollow tube.One end of first stopple coupon 14 is connected with the first air inlet sampling blower fan 16.The other end of the first stopple coupon 14 is adjacent with static pressure cabin 12 air inlet.The pipe shaft of the first stopple coupon 14 is provided with inlet air dry-bulb temperature sensor 15.
The barrel in static pressure cabin 12 is provided with the second stopple coupon 20.Described second stopple coupon 20 is hollow tube.The intracavity inter-connection in the second stopple coupon 20 and static pressure cabin 12.Second stopple coupon 20 is provided with test section air dry-bulb temperature sensor 18 and the second sampling blower fan 19.
The barrel in static pressure cabin 12 is provided with blast pressure measurement ring 11.Described blast pressure measurement ring 11 is circular, and hollow.Between blast pressure measurement ring 11 and static pressure cabin bulkhead 26, be provided with static pressure tapping 22, namely blast pressure measurement ring 11 communicates with static pressure cabin 12.Blast pressure measurement ring 11 is provided with microbarograph 24.
The static pressure cabin air outlet in static pressure cabin 12 is connected with outlet air mixing chamber 23.Described outlet air mixing chamber 23 is the rectangular block of hollow.
Outlet air mixing chamber 23 is provided with large ventilation duct and little ventilation duct.Large ventilation duct is provided with large discharge quick on-off solenoid valve 9, large discharge eddy currents air flow sensor 3 successively.Little ventilation duct is provided with low discharge quick on-off solenoid valve 10, accurate anemoscope 4, low discharge eddy currents air flow sensor 2 successively.The end of large ventilation duct, the end of little large ventilation duct balance blower fan 1 jointly air inlet with static pressure frequency conversion is connected.
See Fig. 1, furtherly, the first stopple coupon 14 is L-shaped.The port being positioned at the first stopple coupon 14 of horizontal segment is connected with the first air inlet sampling blower fan 16.Inlet air dry-bulb temperature sensor 15 is arranged on the horizontal segment of the first stopple coupon 14.Vertically the port of section and the longitudinal center line in static pressure cabin 12 coincide to be positioned at the first stopple coupon 14.
See Fig. 1, furtherly, the second stopple coupon 20 is approximate in " П " shape, comprises by leading portion VERTICAL TUBE, stage casing horizontal tube, back segment VERTICAL TUBE three part.
The bottom of the leading portion VERTICAL TUBE of the second stopple coupon 20, the bottom of back segment VERTICAL TUBE stretch in the cavity in static pressure cabin 12 respectively.And the length that leading portion VERTICAL TUBE stretches in the cavity of static pressure cabin 12 is equal with the length that back segment VERTICAL TUBE stretches in the cavity of static pressure cabin 12.
See Fig. 1, furtherly, test section air dry-bulb temperature sensor 18 and the second sampling blower fan 19 are installed on the stage casing horizontal tube of the second stopple coupon 20.
And test section air dry-bulb temperature sensor 18 is arranged on the stage casing horizontal tube of the second stopple coupon 20 of air inlet side, static pressure cabin, the second sampling blower fan 19 is arranged on the stage casing horizontal tube of air outlet side, static pressure cabin.
See Fig. 2, furtherly, the first perforated plate 17 and the second perforated plate 21 are the plectane being provided with perforation.Static pressure cabin 12 is divided into 3 chambers by the first perforated plate 17 second perforated plate 21.Static pressure cabin 12 between first perforated plate 17 and the second perforated plate 21 is high precision air mass flow test section 25.The length of high precision air mass flow test section 25 is L6.
Second stopple coupon 20 is arranged on the first perforated plate 17 and second and wears on the outer wall in the static pressure cabin 12 between perforated plate 21.
Blast pressure measurement ring 12 is arranged on second and wears on the outer wall in the static pressure cabin 10 between perforated plate 21 and static pressure cabin air outlet.
See Fig. 1, furtherly, large ventilation duct and little ventilation duct all L-shaped.Wherein, large ventilation duct comprises large ventilation duct horizontal segment 6 and the excessive section 8 of large ventilation duct, and little ventilation duct comprises little ventilation duct horizontal segment 5 and the excessive section 7 of little ventilation duct.
The excessive section 8 of large ventilation duct is provided with large discharge quick on-off solenoid valve 9, large ventilation duct horizontal segment 6 is provided with large discharge eddy currents air flow sensor 3.
The excessive section 7 of little ventilation duct is provided with low discharge quick on-off solenoid valve 10, little ventilation duct horizontal segment 5 is provided with accurate anemoscope 4, low discharge eddy currents air flow sensor 2.
The end of large ventilation duct horizontal segment 6 and the end of little ventilation duct horizontal segment 5 balance blower fan 1 jointly air inlet with static pressure frequency conversion is connected.
See Fig. 1, furtherly, remember that the junction of large ventilation duct horizontal segment 6 and the excessive section of large ventilation duct 8 is the flex point of large ventilation duct, the junction of little ventilation duct horizontal segment 5 and the excessive section of little ventilation duct 7 is the flex point of little ventilation duct.
Remember that the distance between the flex point of large ventilation duct to large discharge eddy currents air flow sensor 3 is L2, the junction of large ventilation duct and little ventilation duct is L1 to the distance between large discharge eddy currents air flow sensor 3.
Remember that the distance between the flex point of little ventilation duct to accurate anemoscope 4 is L5, distance between accurate anemoscope 4 to low discharge eddy currents air flow sensor 2 is L4, and the junction of large ventilation duct and little ventilation duct is L3 to the distance between low discharge eddy currents air flow sensor 2.The length of L2 is not less than 10 times of the bore of large ventilation duct horizontal segment 6.The length of L1 is not less than 5 times of the bore of large ventilation duct horizontal segment 6.The length of L5 is not less than 10 times of the bore of little ventilation duct horizontal segment 5.The length of L4 is not less than 10 times of the bore of little ventilation duct horizontal segment 5.The length of L3 is not less than 5 times in the caliber of little ventilation duct horizontal segment 5.The internal diameter of large ventilation duct is 2:1 with the ratio of the internal diameter of little ventilation duct.
Furtherly, the flex point of large ventilation duct is 2000mm to the distance L2 between large discharge eddy currents air flow sensor 3, and the junction of large ventilation duct and little ventilation duct is 1000mm to the distance L1 between large discharge eddy currents air flow sensor 3.The flex point of little ventilation duct is 1000mm to the distance L5 between accurate anemoscope 4, distance L4 between accurate anemoscope 4 to low discharge eddy currents air flow sensor 2 is 1000mm, and the junction of large ventilation duct and little ventilation duct is 500mm to the distance L3 between low discharge eddy currents air flow sensor 2.The internal diameter D1 of large ventilation duct is 200mm, and the internal diameter D2 of little ventilation duct is 100mm.
Furtherly, the model of microbarograph 24 is TM21.The model of inlet air dry-bulb temperature sensor 15 is SBWZPt100.The model of test section air dry-bulb temperature sensor 18 is SBWZPt100.The model of the first sampling blower fan 16 is 97-FLJ2-2WY.The model of the second sampling blower fan 19 is 97-FLJ2-2WY.The model of large discharge quick on-off solenoid valve 9 is 0671XDN200.The model of large discharge eddy currents air flow sensor 3 is LUGB-23-025-4BY-D3-N.The model of low discharge quick on-off solenoid valve 10 is 0671XDN100.The model of accurate anemoscope 4 is EE65-VB5.The model of low discharge eddy currents air flow sensor 2 is LUGB-23-010-4BY-D3-N.The model of static pressure frequency conversion balance blower fan 1 is Y90L-2.
See Fig. 2, furtherly, mixing air import 27 is provided with in the static pressure cabin air inlet in static pressure cabin 12.Described mixing air import 27 is in annular, and protruding outside to static pressure cabin 12, the diameter of mixing air import 27 is less than the diameter in static pressure cabin 12.
See Fig. 1 and Fig. 2, during use: the first sampling blower fan 16 extracts the air of mixing air import 27 by the first stopple coupon 14, measure inlet air temperature by inlet air dry-bulb temperature sensor 15.Air enters static pressure cabin 12 by mixing air import 27.Air themperature in high precision air mass flow test section 25 is extracted through the second stopple coupon 20 by the second sampling blower fan 19, by test section air dry-bulb temperature sensor 18 measuring tempeature, air is by Homogeneous phase mixing after the first perforated plate 17 and the second perforated plate 21, mutual distribution in 90 ° four static pressure inlet composition blast pressure measurement rings 11 are connected with microbarograph 24 one end, microbarograph 24 other end communicates with air, measures the exit static pressure of unit.Air, through outlet air mixing chamber 23, balances blower fan 1 by static pressure frequency conversion and the air of outlet air mixing chamber 23 is extracted out, and according to the difference of flow, low discharge quick on-off solenoid valve 10 and large discharge quick on-off solenoid valve 9 are automatically opened or closed, and are interlocking linkage.When air mass flow is being less than 1000m
3/ h, large discharge quick on-off solenoid valve 9 cuts out, and low discharge quick on-off solenoid valve 10 is opened, and air passes through little ventilation duct horizontal segment 5, when flow is at 200m
3/ h ~ 1000m
3air mass flow is measured by low discharge eddy currents air flow sensor 2, when low discharge eddy currents air flow sensor 2 numerical value is less than 200m between/h
3/ h, system automatically gathers accurate anemoscope 4 and measures numerical value, is scaled flow system flow.When air mass flow is greater than 1000m
3/ h, low discharge quick on-off solenoid valve 10 cuts out, and large discharge quick on-off solenoid valve 9 is opened, and air, by large ventilation duct horizontal segment 6, measures air mass flow by large discharge eddy currents air flow sensor 3.
Claims (10)
1. a pick-up unit for wind tunnel type fan coil air quantity, comprises static pressure cabin (12), the first perforated plate (17) and the second perforated plate (21); The cylinder that described static pressure cabin (12) is both ends open; One end of note static pressure cabin (12) is static pressure cabin air inlet, and its other end is static pressure cabin air outlet; In the cavity of static pressure cabin (12), be provided with the first perforated plate (17) and the second perforated plate (21), wherein, the first perforated plate (17) is near static pressure cabin air inlet, and the second perforated plate (21) is near static pressure cabin air outlet; It is characterized in that:
By fixed support (13), the outer wall of the first stopple coupon (14) with the static pressure cabin (12) near static pressure cabin air inlet is linked together; Described first stopple coupon (14) is hollow tube; The air inlet that one end and first of first stopple coupon (14) samples blower fan (16) is connected; The other end of the first stopple coupon (14) is adjacent with static pressure cabin (12) air inlet; The pipe shaft of the first stopple coupon (14) is provided with inlet air dry-bulb temperature sensor (15);
The barrel of static pressure cabin (12) is provided with the second stopple coupon (20); Described second stopple coupon (20) is hollow tube; The intracavity inter-connection in the second stopple coupon (20) and static pressure cabin (12); Second stopple coupon (20) is provided with test section air dry-bulb temperature sensor (18) and the second sampling blower fan (19);
The barrel of static pressure cabin (12) is provided with blast pressure measurement ring (11); Described blast pressure measurement ring (11) is for circular, and hollow; Between blast pressure measurement ring (11) and static pressure cabin bulkhead (26), be provided with static pressure tapping (22), namely blast pressure measurement ring (11) communicates with static pressure cabin (12); Blast pressure measurement ring (11) is provided with microbarograph (24);
The static pressure cabin air outlet in static pressure cabin (12) is connected with outlet air mixing chamber (23); The rectangular block that described outlet air mixing chamber (23) is hollow;
Outlet air mixing chamber (23) is provided with large ventilation duct and little ventilation duct; Large ventilation duct is provided with large discharge quick on-off solenoid valve (9), large discharge eddy currents air flow sensor (3) successively; Little ventilation duct is provided with low discharge quick on-off solenoid valve (10), accurate anemoscope (4), low discharge eddy currents air flow sensor (2) successively; The end of large ventilation duct, the end of little large ventilation duct balance blower fan (1) jointly air inlet with static pressure frequency conversion is connected.
2. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 1, is characterized in that: the first stopple coupon (14) is L-shaped; The air inlet that the port and first being positioned at first stopple coupon (14) of horizontal segment samples blower fan (16) is connected; Inlet air dry-bulb temperature sensor (15) is arranged on the horizontal segment of the first stopple coupon (14); First stopple coupon (14) the vertically port of section and the longitudinal center line of static pressure cabin (12) coincides.
3. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 1, is characterized in that: the second stopple coupon (20) is approximate in " П " shape, comprises by leading portion VERTICAL TUBE, stage casing horizontal tube, back segment VERTICAL TUBE three part;
The bottom of the leading portion VERTICAL TUBE of the second stopple coupon (20), the bottom of back segment VERTICAL TUBE stretch in the cavity of static pressure cabin (12) respectively; And the length that leading portion VERTICAL TUBE stretches in static pressure cabin (12) cavity is equal with the length that back segment VERTICAL TUBE stretches in static pressure cabin (12) cavity.
4. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 3, is characterized in that: test section air dry-bulb temperature sensor (18) and the second sampling blower fan (19) are installed on the stage casing horizontal tube of the second stopple coupon (20);
And test section air dry-bulb temperature sensor (18) is arranged on the stage casing horizontal tube of second stopple coupon (20) of air inlet side, static pressure cabin, the second sampling blower fan (19) is arranged on the stage casing horizontal tube of air outlet side, static pressure cabin.
5. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 1, is characterized in that: the first perforated plate (17) and the second perforated plate (21) are the plectane being provided with perforation; Static pressure cabin (12) are divided into 3 chambers by the first perforated plate (17), the second perforated plate (21); Static pressure cabin (12) between first perforated plate (17) and the second perforated plate (21) is high precision air mass flow test section (25);
Second stopple coupon (20) is arranged on the first perforated plate (17) and second and wears on the outer wall in the static pressure cabin (12) between perforated plate (21);
Blast pressure measurement ring (12) is arranged on second and wears on the outer wall in the static pressure cabin (10) between perforated plate (21) and static pressure cabin air outlet.
6. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 1, is characterized in that: large ventilation duct and little ventilation duct all L-shaped; Wherein, large ventilation duct comprises large ventilation duct horizontal segment (6) and the excessive section of large ventilation duct (8), and little ventilation duct comprises little ventilation duct horizontal segment (5) and the excessive section of little ventilation duct (7);
The excessive section of large ventilation duct (8) is provided with large discharge quick on-off solenoid valve (9), large ventilation duct horizontal segment (6) is provided with large discharge eddy currents air flow sensor (3);
The excessive section of little ventilation duct (7) is provided with low discharge quick on-off solenoid valve (10), little ventilation duct horizontal segment (5) is provided with accurate anemoscope (4), low discharge eddy currents air flow sensor (2);
The end of large ventilation duct horizontal segment (6) and the end of little ventilation duct horizontal segment (5) balance blower fan (1) jointly air inlet with static pressure frequency conversion is connected.
7. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 6, it is characterized in that: remember that the junction of large ventilation duct horizontal segment (6) and the excessive section of large ventilation duct (8) is the flex point of large ventilation duct, the junction of little ventilation duct horizontal segment (5) and the excessive section of little ventilation duct (7) is the flex point of little ventilation duct;
Remember that the distance between the flex point of large ventilation duct to large discharge eddy currents air flow sensor (3) is L2, the junction of large ventilation duct and little ventilation duct is L1 to the distance between large discharge eddy currents air flow sensor (3);
Remember that the distance between the flex point of little ventilation duct to accurate anemoscope (4) is L5, distance between accurate anemoscope (4) to low discharge eddy currents air flow sensor (2) is L4, and the junction of large ventilation duct and little ventilation duct is L3 to the distance between low discharge eddy currents air flow sensor (2);
The length of L2 is not less than 10 times of the internal diameter of large ventilation duct horizontal segment (6); The length of L1 is not less than 5 times of the internal diameter of large ventilation duct horizontal segment (6);
The length of L5 is not less than 10 times of the bore of little ventilation duct horizontal segment (5); The length of L4 is not less than 10 times of the internal diameter of little ventilation duct horizontal segment (5); The length of L3 is not less than 5 times of the internal diameter of little ventilation duct horizontal segment (5);
The internal diameter of large ventilation duct is 2:1 with the ratio of the internal diameter of little ventilation duct.
8. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 7, it is characterized in that: the flex point of large ventilation duct is 2000mm to the distance L2 between large discharge eddy currents air flow sensor (3), and the junction of large ventilation duct and little ventilation duct is 1000mm to the distance L1 between large discharge eddy currents air flow sensor (3);
The flex point of little ventilation duct is 1000mm to the distance L5 between accurate anemoscope (4), distance L4 between accurate anemoscope (4) to low discharge eddy currents air flow sensor (2) is 1000mm, and the junction of large ventilation duct and little ventilation duct is 500mm to the distance L3 between low discharge eddy currents air flow sensor (2);
The internal diameter D1 of large ventilation duct is 200mm, and the internal diameter D2 of little ventilation duct is 100mm.
9. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 1, is characterized in that: the model of microbarograph (24) is TM21; The model of inlet air dry-bulb temperature sensor (15) is SBWZPt100; The model of test section air dry-bulb temperature sensor (18) is SBWZPt100; The model of the first sampling blower fan (16) is 97-FLJ2-2WY; The model of the second sampling blower fan (19) is 97-FLJ2-2WY; The model of large discharge quick on-off solenoid valve (9) is 0671XDN200; The model of large discharge eddy currents air flow sensor (3) is LUGB-23-025-4BY-D3-N; The model of low discharge quick on-off solenoid valve (10) is 0671XDN100; The model of accurate anemoscope (4) is EE65-VB5; The model of low discharge eddy currents air flow sensor (2) is LUGB-23-010-4BY-D3-N; The model of static pressure frequency conversion balance blower fan (1) is Y90L-2.
10. the pick-up unit of a kind of wind tunnel type fan coil air quantity according to claim 1, is characterized in that: be provided with mixing air import (27) in the static pressure cabin air inlet of static pressure cabin (12); Described mixing air import (27) is in annular, and protruding outside to static pressure cabin (12), the diameter of mixing air import (27) is less than the diameter of static pressure cabin (12); Static pressure cabin air inlet is the mixing air import (27) of this pick-up unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679090.1U CN204944814U (en) | 2015-09-02 | 2015-09-02 | A kind of pick-up unit of wind tunnel type fan coil air quantity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679090.1U CN204944814U (en) | 2015-09-02 | 2015-09-02 | A kind of pick-up unit of wind tunnel type fan coil air quantity |
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| Publication Number | Publication Date |
|---|---|
| CN204944814U true CN204944814U (en) | 2016-01-06 |
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|---|---|---|---|
| CN201520679090.1U Expired - Fee Related CN204944814U (en) | 2015-09-02 | 2015-09-02 | A kind of pick-up unit of wind tunnel type fan coil air quantity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043752A (en) * | 2015-09-02 | 2015-11-11 | 安徽省产品质量监督检验研究院 | Wind tunnel type blower coil pipe wind volume detection device |
-
2015
- 2015-09-02 CN CN201520679090.1U patent/CN204944814U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043752A (en) * | 2015-09-02 | 2015-11-11 | 安徽省产品质量监督检验研究院 | Wind tunnel type blower coil pipe wind volume detection device |
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