CN107860531A - A kind of floor air supply system air leak test device and detection method - Google Patents
A kind of floor air supply system air leak test device and detection method Download PDFInfo
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- CN107860531A CN107860531A CN201711025657.3A CN201711025657A CN107860531A CN 107860531 A CN107860531 A CN 107860531A CN 201711025657 A CN201711025657 A CN 201711025657A CN 107860531 A CN107860531 A CN 107860531A
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- floor
- air
- supply system
- cavity
- test device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The present invention relates to a kind of floor air supply system air leak test device, including centrifugal blower, air compartment, aerosol producer and the floor cavity being made up of raised flooring, floor stand and terrace, the centrifugal blower is connected with air compartment by pipeline, the air compartment is connected with floor cavity by flexible pipe, differential manometer is connected with air compartment, differential manometer is connected on the raised flooring, the aerosol producer is placed in the cavity of floor.Present invention also offers the detection method of above-mentioned floor air supply system air leak test device.The air leak test device of the present invention disclosure satisfy that floor air supply system detection institute's required airflow and pressure, and large area floor cavity leak source position is easily captured using aerosol producer.The detection method of the present invention improves the tightness detection efficiency of floor air supply system, makes the result of calculation of air leak rate of air curtain more accurate.
Description
Technical field
The present invention relates to a kind of floor air supply system air leak test device and detection method, belong to Under-Floor Air-conditioning System
Air leak test technical field.
Background technology
Under-Floor Air-conditioning System is a kind of new form of all-air air conditioning system.With traditional upper supply air system not
Together, Under-Floor Air-conditioning System is that the air supply plenum chamber formed using raised flooring with structure floor and wall is blown, will
Air after air-conditioning is handled is by the air quantity variable end device that is arranged in the plenum chamber of floor or on raised flooring
Floor air supply register be sent into each temperature-controlled area, carried out with room air after hot and humid area from room top return air inlet or exhaust outlet
Discharge.The characteristics of Under-Floor Air-conditioning System is that air-supply static pressure is small, and plenum chamber seal requires high, and generally whole aspect is one to send
Wind plenum chamber, developed area is big, and installation is related to multiple specialties such as hard-cover, electromechanics, curtain wall, civil engineering, in every professional construction such as
Fruit blocks imprecision, can all cause to leak out, and this catches for the air leakage rate testing and leak source of underfloor air distribution system plenum and proposes sternness
Test.
Existing Q89 types inleakage instrument test scope is 10.8m3/ h~475.2m3/ h, and large-scale floor air supply system, it is whole
Individual floor raised flooring is a plenum chamber, and air output needed for air-conditioning reaches 10000m3/ h~20000m3/ h, design permission inleakage are
The 10% of total blast volume, i.e. 1000m3/ h~2000m3The testing range of/h, Q89 type inleakage instrument has been unable to reach test request, and
Do not possess leak source capture function.
The Chinese patent application for the Application No. 201720974996.5 that the applicant submitted on the 4th in August in 2017 discloses
A kind of tightness detector, it can be used in detecting the tightness of the equipment such as airduct, unitary air handling unit, the detection means
Test air quantity can reach 4500m3/h.Because the volume of Under-Floor Air-conditioning System is big, it is understood that there may be leak out it is a little more, on
The test for stating tightness detector is ineffective.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of floor air supply system air leak test device, can be used in
Detect the tightness of floor air supply system and easily the leak source of chamber is caught.
In order to solve the above problems, the technical solution adopted by the present invention is as follows：
A kind of floor air supply system air leak test device, including centrifugal blower, air compartment, aerosol producer and aerial ground
Plate, floor stand and terrace, the floor stand are installed on terrace, and the raised flooring is arranged on the top of floor stand,
Raised flooring and terrace composition floor cavity,
The centrifugal blower is connected with air compartment by pipeline, and the air compartment is connected with floor cavity by flexible pipe, on air compartment
Differential manometer is connected with, differential manometer is connected on the raised flooring, the aerosol producer is placed in the cavity of floor,
The air compartment is a casing, and the vertically arranged demarcation strip in air compartment inner chamber is divided into first close to centrifugal blower
Chamber and the second chamber close to equipment under test, lay some long-radius nozzles on demarcation strip, the negative pressure of above-mentioned differential manometer connect mouth with
First chamber connects, and the positive crimping mouth of differential manometer connects with second chamber.
4500m can be reached using the test air quantity of above-mentioned plenum chamber structure3/ h, is used cooperatively with aerosol producer, can be square
Just the leak source position of floor cavity supply air system is rapidly captured.
Further, spread in order to facilitate smog, the aerosol producer is placed near the air outlet of flexible pipe.
Further, in order to improve the sealing of junction, the air outlet of the flexible pipe connects stainless steel cover plate, described stainless
Steel deck-plate is covered on raised flooring.
Further, the flexible pipe is copper core plastic flexible pipe.
Further, the air outlet of the flexible pipe is located at the intermediate region position of raised flooring.
The operation principle of floor air supply system air leak test device of the present invention is successively to start aerosol producer and centrifugation wind
Machine, high concentration smog caused by aerosol producer are flown away to floor cavity everywhere, for searching the leakage of floor cavity with suppressing
Point；Air-flow measures pressure difference after air compartment, by differential manometer, and compared with the static pressure parameter that differential manometer measures, works as differential manometer
When equal with the parameter of differential manometer, represent that equipment under test without gas leakage, when both parameters are unequal, represents that equipment under test has leakage
Gas.
Present invention also offers the detection method of above-mentioned floor air supply system air leak test device, can effectively carry out leak source
Catch.Specifically comprise the following steps：
S1：Aerosol producer is placed in the cavity of floor, connect centrifugal blower by pipeline connects on air compartment with air compartment
Differential manometer is connect, differential manometer is connected on raised flooring, air compartment and floor cavity are then connected by flexible pipe；
S2：By floor cavity test request, the rate score that leaks out allowed is calculated；
S3：Open aerosol producer so that after smog forms certain concentration in cavity, be then then turned on centrifugal blower；
S4：According to test request, adjust the air quantity of air compartment and be sent into the pressure of floor cavity；
S5：The numerical value of the differential manometer is observed, when floor, cavity reads after reaching test pressure requirement and records the numerical value,
The pressure drop of the differential manometer is read, by the way that the rate score that leaks out of floor cavity is calculated, so as to judge that floor cavity is
It is no to meet tightness requirement.
Further, the test pressure of floor cavity is 12.5Pa~25Pa in step S5.
Further, above-mentioned detection method also includes step S6：The installation site of differential manometer is adjusted, then repeat step S5.
Further, the installation site of differential manometer at least adjusts 8 times in step S6, and installation site is centered on flexible pipe is suppressed a little
It is adjusted from the near to the remote.
Further, the aerosol producer is placed on flexible pipe and suppressed near mouth.
The principle of detection method is, because floor cavity area is big, aerosol producer to be opened before suppressing, in advance
Projecting fog forms certain concentration in cavity, is then turned on centrifugal blower, is suppressed by flexible pipe into floor cavity.It is local
After plate cavity reaches test pressure requirement, observation is arranged on the numerical value of the differential manometer on raised flooring, reads and records after stable
The numerical value, while the pressure drop of differential manometer is read, by the way that the rate score that leaks out of floor cavity is calculated, so as to judge floor
Whether cavity meets tightness requirement.
To sum up, compared with prior art, the beneficial effects of the present invention are：
1st, air leak test device of the invention disclosure satisfy that floor air supply system detection institute's required airflow and pressure, utilize smog
Generator easily captures large area floor cavity leak source position.
2nd, detection method of the invention, improves the tightness detection efficiency of floor air supply system, makes the calculating of air leak rate of air curtain
As a result it is more accurate.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of floor air supply system air leak test device one of the present invention.
In figure：1st, centrifugal blower；2nd, pipeline；3rd, air compartment；3a, regulating valve；4th, differential manometer；5th, copper core plastic flexible pipe；6th, no
Become rusty steel deck-plate；7th, aerosol producer；8th, differential manometer；9th, raised flooring；10th, floor stand；11st, floor cavity；12nd, terrace.
Fig. 2 is the structural representation of air compartment 3 in the present invention.
In figure：4th, differential manometer；301st, demarcation strip；302nd, long-radius nozzle；303rd, homogenizing plate；A, first chamber；B, the second chamber
Room.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.According to following explanation, sheet
The purpose, technical scheme and advantage of invention will be apparent from.It should be noted that described embodiment is the preferred of the present invention
Embodiment, rather than whole embodiments.
With reference to shown in Fig. 1, a kind of floor air supply system air leak test device, including centrifugal blower 1, air compartment 3, smog occur
Device 7 and raised flooring 9, floor stand 10 and terrace 12, the floor stand 10 are installed on terrace 12, the raised flooring
9 are arranged on the top of floor stand 10, and raised flooring 9 and terrace 12 form floor cavity 11.
The centrifugal blower 1 is connected with air compartment 3 by pipeline 2, and the air compartment 3 is connected with floor cavity 11 by flexible pipe 5,
Differential manometer 4 is connected with air compartment 3, connects differential manometer 8 on the raised flooring 9, the aerosol producer 7 is placed on floor cavity
In 11.With reference to shown in figure 2, the structure of the air compartment 3 is related to using the Chinese patent application of application number 201720974996.5
Air compartment, the air compartment 3 is a casing, and the vertically arranged demarcation strip 301 in the inner chamber of air compartment 3 is divided into close to centrifugal blower
The first chamber A and second chamber B close to equipment under test, lays some long-radius nozzles 302, above-mentioned differential manometer 4 on demarcation strip 301
Negative pressure connect mouth and connected with first chamber A, the positive crimping mouth of differential manometer connects with second chamber B.The flexible pipe 5 is preferably copper core
Plastic flexible pipe.The air outlet of the flexible pipe 5 is preferably placed at the intermediate region position of raised flooring 9.
Spread in order to facilitate smog, the aerosol producer 7 is preferably positioned near the air outlet of flexible pipe 5.
In order to improve the sealing of junction, the air outlet connection stainless steel cover plate 6 of the flexible pipe 5, the stainless steel cover
Plate 6 is covered on raised flooring 9.
The operation principle of above-mentioned floor air supply system air leak test device is successively to start aerosol producer and centrifugation wind
Machine, high concentration smog caused by aerosol producer are flown away to floor cavity everywhere, for searching the leakage of floor cavity with suppressing
Point；By adjusting fan delivery, and using differential manometer measure floor cavity and room static pressure difference meet design requirement after, read
Section pressure difference before and after air compartment, the numerical quantity that leaks out of floor cavity can be calculated by pressure difference.
The detection method of above-mentioned floor air supply system air leak test device, comprises the following steps：
S1：Aerosol producer 7 is placed in floor cavity 11, centrifugal blower 1 and air compartment 3 are connected by pipeline 2, in wind
Differential manometer 4 is connected on room 3, differential manometer 8 is connected on raised flooring 9, air compartment 3 and floor cavity 11 are then connected by flexible pipe 5；
S2：According to the test request of floor cavity 9, the rate score that leaks out allowed is calculated；
S3：Open aerosol producer 7 so that after smog forms certain concentration in cavity, be then then turned on centrifugal blower
1；
S4：According to test request, the air quantity of air compartment 3 is adjusted by regulating valve 3a and is sent into the pressure of floor cavity 11；
S5：The numerical value of the differential manometer 8 is observed, is read after floor cavity 11 reaches test pressure requirement and records the number
Value, the pressure drop of the differential manometer 4 is read, by the way that the rate score that leaks out of floor cavity 11 is calculated, so as to judge floor
Whether cavity 11 meets tightness requirement.
Further, the test pressure of floor cavity 11 is 12.5Pa~25Pa in step s 5.
Further, in order that measurement result is more accurate, above-mentioned detection method also includes also including step S6：Adjust minute-pressure
8 installation site is counted, then repeat step S5.
The installation site of differential manometer 8 at least adjusts 8 times in step S6, installation site by flexible pipe 5 suppress a little centered on by near
To being far adjusted.
The aerosol producer 7 is preferably positioned at flexible pipe 5 and suppressed near mouth.
The principle of above-mentioned detection method is, because floor cavity area is big, aerosol producer to be opened before suppressing, is existed in advance
Projecting fog forms certain concentration in cavity, is then turned on centrifugal blower, is suppressed by flexible pipe into floor cavity.Work as floor
After cavity reaches test pressure requirement, observation is arranged on the numerical value of the differential manometer on raised flooring, is read after stable and records this
Numerical value, while the pressure drop of differential manometer is read, by the way that the rate score that leaks out of floor cavity is calculated, so as to judge floor sky
Whether chamber meets tightness requirement.
It is described above, only it is the description explanation of the preferred embodiment of the present invention, not limiting the scope of the present invention, shows
So, any those skilled in the art are based on above-described embodiment, can readily occur in replacement or change to obtain other implementations
Example, these all should be included within the scope of the present invention.
Claims (10)
- A kind of 1. floor air supply system air leak test device, it is characterised in that：Including centrifugal blower (1), air compartment (3), aerosol producer (7) and raised flooring (9), floor stand (10) and terrace (12), the floor stand (10) is installed on terrace (12), and the raised flooring (9) is arranged on the top of floor stand (10) End, raised flooring (9) and terrace (12) composition floor cavity (11),The centrifugal blower (1) is connected with air compartment (3) by pipeline (2), and the air compartment (3) passes through flexible pipe with floor cavity (11) (5) connect, differential manometer (4) is connected with air compartment (3), differential manometer (8) is connected on the raised flooring (9), the smog occurs Device (7) is placed in floor cavity (11),The air compartment (3) is a casing, and the vertically arranged demarcation strip (301) in air compartment (3) inner chamber is divided into close to centrifugation wind The first chamber (A) of machine and the second chamber (B) close to equipment under test, demarcation strip lay some long-radius nozzles on (301) (302), the negative pressure of above-mentioned differential manometer (4) connects mouth and connected with first chamber (A), positive crimping mouth and the second chamber (B) of differential manometer Connection.
- 2. floor air supply system air leak test device according to claim 1, it is characterised in that：The aerosol producer (7) is placed near the air outlet of flexible pipe (5).
- 3. floor air supply system air leak test device according to claim 1, it is characterised in that：The air outlet connection stainless steel cover plate (6) of the flexible pipe (5), the stainless steel cover plate (6) are covered in raised flooring (9) On.
- 4. the floor air supply system air leak test device according to claims 1 to 3 any claim, it is characterised in that：The flexible pipe (5) is copper core plastic flexible pipe.
- 5. the floor air supply system air leak test device according to claims 1 to 3 any claim, it is characterised in that：The air outlet of the flexible pipe (5) is located at the intermediate region position of raised flooring (9).
- 6. the detection method of the floor air supply system air leak test device as described in claim 1 or 2 or 3, it is characterised in that bag Include following steps：S1：Aerosol producer (7) is placed in floor cavity (11), centrifugal blower (1) and air compartment are connected by pipeline (2) (3) differential manometer (4), is connected on air compartment (3), differential manometer (8) is connected on raised flooring (9), is then connected by flexible pipe (5) Air compartment (3) and floor cavity (11)；S2：According to floor cavity (11) test request, the rate score that leaks out allowed is calculated；S3：Open aerosol producer (7) so that after smog forms certain concentration in cavity, open centrifugal blower (1)；S4：According to test request, the air quantity of air compartment (3) is adjusted by regulating valve (3a) and is sent into the pressure of floor cavity (11)；S5：The numerical value of the differential manometer (8) is observed, is read after floor cavity (11) reaches test pressure requirement and records the number Value, the pressure drop of the differential manometer (4) is read, by the way that the rate score that leaks out of floor cavity (11) is calculated, so as to judge Whether floor cavity (11) meets tightness requirement.
- 7. the detection method of floor air supply system air leak test device according to claim 6, it is characterised in that：The test pressure of floor cavity (11) is 12.5Pa~25Pa in step s 5.
- 8. the detection method of floor air supply system air leak test device according to claim 6, it is characterised in that：Also include step S6：The installation site of differential manometer (8) is adjusted, then repeat step S5.
- 9. the detection method of floor air supply system air leak test device according to claim 8, it is characterised in that：The installation site of differential manometer (8) at least adjusts 8 times in step S6, installation site by flexible pipe (5) suppress a little centered on by near To being far adjusted.
- 10. the detection method of floor air supply system air leak test device according to claim 6, it is characterised in that：The aerosol producer (7) is placed on flexible pipe (5) and suppressed near mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025657.3A CN107860531A (en) | 2017-10-27 | 2017-10-27 | A kind of floor air supply system air leak test device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025657.3A CN107860531A (en) | 2017-10-27 | 2017-10-27 | A kind of floor air supply system air leak test device and detection method |
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| CN107860531A true CN107860531A (en) | 2018-03-30 |
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| CN201711025657.3A Pending CN107860531A (en) | 2017-10-27 | 2017-10-27 | A kind of floor air supply system air leak test device and detection method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532901A (en) * | 2009-04-13 | 2009-09-16 | 苏州工业设备安装集团有限公司 | Air leakage amount testing device of clean air conditioning system |
| CN201348557Y (en) * | 2009-01-23 | 2009-11-18 | 广东省建筑科学研究院 | Air leakage rate field test apparatus for air conditioner |
| CN102912966A (en) * | 2012-10-23 | 2013-02-06 | 东南大学常州研究院 | Sealing method applicable to underfloor air conditioning system and floor integrated device |
| CN103411742A (en) * | 2013-07-29 | 2013-11-27 | 中国五冶集团有限公司 | Method and system for testing tightness of air pressure of air pipe |
| CN205317749U (en) * | 2015-12-21 | 2016-06-15 | 中国神华能源股份有限公司 | Gas piping's leak out detection device and oxygen boosting combustion system |
-
2017
- 2017-10-27 CN CN201711025657.3A patent/CN107860531A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201348557Y (en) * | 2009-01-23 | 2009-11-18 | 广东省建筑科学研究院 | Air leakage rate field test apparatus for air conditioner |
| CN101532901A (en) * | 2009-04-13 | 2009-09-16 | 苏州工业设备安装集团有限公司 | Air leakage amount testing device of clean air conditioning system |
| CN102912966A (en) * | 2012-10-23 | 2013-02-06 | 东南大学常州研究院 | Sealing method applicable to underfloor air conditioning system and floor integrated device |
| CN103411742A (en) * | 2013-07-29 | 2013-11-27 | 中国五冶集团有限公司 | Method and system for testing tightness of air pressure of air pipe |
| CN205317749U (en) * | 2015-12-21 | 2016-06-15 | 中国神华能源股份有限公司 | Gas piping's leak out detection device and oxygen boosting combustion system |
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Application publication date: 20180330 |
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