CN203824643U - Noise testing device for coil pipe of blower fan - Google Patents
Noise testing device for coil pipe of blower fan Download PDFInfo
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- CN203824643U CN203824643U CN201420159213.4U CN201420159213U CN203824643U CN 203824643 U CN203824643 U CN 203824643U CN 201420159213 U CN201420159213 U CN 201420159213U CN 203824643 U CN203824643 U CN 203824643U
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 230000003068 static effect Effects 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 7
- 238000012797 qualification Methods 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 description 6
- 230000002950 deficient Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a noise testing device for a coil pipe of a blower fan. The noise testing device comprises a hoisting rack capable of suspending the coil pipe of the blower fan in a preset height H, and a first microphone which is arranged lm right below the air outlet of the coil pipe of the blower fan and which is used to test a voice intensity I1 under a noise frequency below 125Hz right below the coil pipe of the blower fan and a voice intensity I2 under noise frequency below 250Hz. The first microphone is used to test a voice intensity I1 under a noise frequency below 125Hz right below the coil pipe of the blower fan and a voice intensity I2 under noise frequency below 250Hz, and a tester determines whether the low noise of the coil pipe of the blower fan is qualified based on the I1 and I2. Since the first microphone is arranged 1m right below the air outlet of the coil pipe of the blower fan, the low-frequency noise may not be affected by the wind noise, and the test result of the first microphone may not be affected by artificial factors. The noise testing device prevents human interference on the low-frequency noise test of the coil pipe of the blower fan, thereby improving the accuracy of qualification of low-frequency noise of the coil pipe of the blower fan.
Description
Technical field
The utility model relates to air conditioner noises technical field of measurement and test, more particularly, relates to a kind of fan coil noise-measuring system.
Background technology
At present, when Horizontal type concealed fan coil is carried out to noise testing, only at the front lower place of fan coil air outlet 1m * 1m, measuring point is set, namely apart from the position that is 1 meter, is set to measuring point with the horizontal and vertical of fan coil bottom; At this measuring point, noise intensity is detected, and the noise intensity of the noise intensity of detection and Standard of Environmental Noise regulation is compared, judge whether fan coil meets noise criteria regulation.
Yet along with people are more and more higher to the requirement of Dwelling Environment quality, the qualification determination of fan coil low-frequency noise is particularly important.Because above-mentioned measuring point is positioned at the place ahead of fan coil air outlet, this measuring point can be subject to the impact of sound of the wind when test low-frequency noise, so the main people of dependence ear is on-the-spot at present, judge that whether low-frequency noise is qualified, but be subject to the impact of human factor, the noise sound intensity obtaining by people's ear is prone to error, and then can cause the accuracy of qualification determination of fan coil low-frequency noise lower.
In sum, how reducing the impact of human factor on fan coil low frequency noise measurement, to improve the accuracy of fan coil low-frequency noise qualification determination, is current those skilled in the art technical matterss urgently to be resolved hurrily.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of fan coil noise-measuring system, to reduce the impact of human factor on fan coil low frequency noise measurement, and then the accuracy of raising fan coil low-frequency noise qualification determination.
In order to achieve the above object, the utility model provides following technical scheme:
A fan coil noise-measuring system, comprising:
Fan coil can be suspended on to the mast-up at preset height H place;
For testing the intensity of sound I1 of noise frequency under 125Hz and the first microphone of the intensity of sound I2 under 250Hz under described fan coil, described the first microphone be arranged on described fan coil air outlet under 1m place.
Preferably, above-mentioned fan coil noise-measuring system also comprises when I1 and I2 are all less than 15 decibels or I1-I2≤0.5 decibel, judges the qualified decision maker of low-frequency noise, and described decision maker is connected with described the first microphone.
Preferably, above-mentioned fan coil noise-measuring system also comprises for supporting the support of described the first microphone.
Preferably, in above-mentioned fan coil noise-measuring system, described preset height H is 2.7m.
Preferably, above-mentioned fan coil noise-measuring system also comprises the backwind tube that can be connected with described fan coil air inlet.
Preferably, above-mentioned fan coil noise-measuring system also comprises the damping screen of the inflow point that is arranged on described backwind tube, and described damping screen is 0.7m apart from the distance of described fan coil air inlet.
Preferably, above-mentioned fan coil noise-measuring system also comprises the static pressure rings being arranged in described backwind tube, and described static pressure rings is 0.2m apart from the distance of described fan coil air inlet.
Preferably, above-mentioned fan coil noise-measuring system also comprises that horizontal range and the vertical range of described second microphone and described air outlet are 1m for testing the intensity of sound of noise frequency under 125Hz and the second microphone of the intensity of sound under 250Hz of described fan coil front lower place.
From above-mentioned technical scheme, can find out, the fan coil noise-measuring system that the utility model provides comprises can be suspended on fan coil the mast-up at preset height H place and for testing the intensity of sound I1 of noise frequency under 125Hz and the first microphone of the intensity of sound I2 under 250Hz under fan coil, this first microphone be arranged on fan coil air outlet under 1m place.
Fan coil noise-measuring system of the present utility model is when test, utilize mast-up that fan coil is suspended on to preset height H place, then the first microphone is arranged on fan coil air outlet under 1m place, utilize the first microphone can test out noise frequency under fan coil intensity of sound I1 and the intensity of sound I2 under 250Hz under 125Hz.Now, tester can judge that whether fan coil low-frequency noise is qualified, concrete by I1 and I2, and when 15 decibels of I1 and the equal < of I2, it is qualified to judge; At least one in I1 and I2 >=15 decibel, and both are not all in whole frequency spectrum during peak, during I1-I2≤0.5 decibel, it is qualified to judge, otherwise defective.
The utility model by the first microphone be arranged on fan coil air outlet under 1m place, can avoid the impact of sound of the wind on low-frequency noise, and the test result of the first microphone is not subject to interference from human factor, so above-mentioned fan coil noise-measuring system can reduce the impact of human factor on fan coil low frequency noise measurement, and then improved the accuracy of fan coil low-frequency noise qualification determination.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the fan coil noise-measuring system that provides of the utility model embodiment.
Embodiment
The utility model embodiment provides a kind of fan coil noise-measuring system, can reduce the impact of human factor on fan coil low frequency noise measurement, and then has improved the accuracy of fan coil low-frequency noise qualification determination.
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to accompanying drawing 1, the fan coil noise-measuring system that the utility model embodiment provides comprises can be suspended on fan coil 7 mast-up 1 at preset height H place and for testing the intensity of sound I1 of noise frequency under 125Hz and the first microphone 2 of the intensity of sound I2 under 250Hz under fan coil 7, this first microphone 2 be arranged on fan coil 7 air outlets under 1m place.It should be noted that, the utility model adopts third-octave frequency, and this third-octave frequency comprises 63,125,250,500,1000,2000,4000,8000Hz totally 8 centre frequency sections.The utility model selects the 125Hz of low-frequency range and 250Hz as test frequency, can make good judgement to low-frequency noise.
Fan coil noise-measuring system of the present utility model is when test, utilize mast-up 1 that fan coil 7 is suspended on to preset height H place, then the first microphone 2 is arranged on fan coil 7 air outlets under 1m place, form measuring point 1, utilize the first microphone 2 can test out noise frequency under fan coil 7 intensity of sound I1 and the intensity of sound I2 under 250Hz under 125Hz.Now, tester can judge that whether fan coil low-frequency noise is qualified, concrete by I1 and I2, and when 15 decibels of I1 and the equal < of I2, it is qualified to judge; At least one in I1 and I2 >=15 decibel, and both are not all in whole frequency spectrum during peak, during I1-I2≤0.5 decibel, it is qualified to judge, otherwise defective.
The utility model by the first microphone 2 be arranged on fan coil 7 air outlets under 1m place, can avoid the impact of sound of the wind on low-frequency noise, and the test result of the first microphone 2 is not subject to interference from human factor, so above-mentioned fan coil noise-measuring system can reduce the impact of human factor on fan coil low frequency noise measurement, and then improved the accuracy of fan coil low-frequency noise qualification determination.
In the utility model one specific embodiment, fan coil noise-measuring system also comprises when I1 and I2 are all less than 15 decibels or I1-I2≤0.5 decibel, judges the qualified decision maker of low-frequency noise, and decision maker is connected with the first microphone 2.What the utility model was concrete judges that by decision maker whether fan coil low-frequency noise is qualified, has realized the qualified automatic judgement of low-frequency noise, has substituted manpower and has calculated and manpower comparison, has saved manpower.The utility model also can not arrange above-mentioned decision maker, directly by tester, judges.
Stability while testing in order to improve the first microphone 2, fan coil noise-measuring system also comprises for supporting the support of the first microphone 2.The utility model by support by the first microphone 2 be supported on fan coil 7 air outlets under and apart from the distance of above-mentioned air outlet, be L=1m place, can avoid the first microphone 2 rocking of producing of when test, can also guarantee that the first microphone 2 accurately reaches predeterminated position, has improved the accuracy of test result simultaneously.The utility model also can not arrange support, by tester's hand, takes microphone to test.
Further, mast-up 1 is suspended on preset height H=2.7m place by fan coil 7, and this is highly convenient to install, and now the first microphone 2 ground heights are 1.7m, and staff can reach, and is convenient to test, the installation of having saved support.
In order to improve test effect, fan coil noise-measuring system also comprises the backwind tube 5 that can be connected with fan coil 7 air inlets.This backwind tube 5 can improve the static pressure of fan coil 7 air inlets, makes air intake more even.
Fan coil noise-measuring system also comprises the damping screen 6 of the inflow point that is arranged on backwind tube 5, and damping screen 6 is 0.7m apart from the distance of fan coil 7 air inlets.The utility model utilize damping screen 6 stop with filtered air in dust, improved the spatter property of blower fan inside.
Above-mentioned fan coil noise-measuring system also comprises the static pressure rings 4 being arranged in backwind tube 5, and static pressure rings 4 is 0.2m apart from the distance of fan coil air inlet.This static pressure rings 4 is the blast of fan coil air inlet steadily, improves air-supply effect.
In order further to optimize technique scheme, fan coil noise-measuring system also comprises for testing the intensity of sound of noise frequency under 125Hz and the second microphone 3 of the intensity of sound under 250Hz of fan coil front lower place, and second microphone 3 is 1m with horizontal range and the vertical range of air outlet.The utility model forms measuring point 2 by second microphone 3 is set, utilize the intensity of sound of second microphone 3 detection noise frequencies under 125Hz and the intensity of sound noise intensity under 250Hz, be convenient to compare with the noise intensity of Standard of Environmental Noise regulation, judge whether fan coil meets noise criteria regulation.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a fan coil noise-measuring system, is characterized in that, comprising:
Fan coil (7) can be suspended on to the mast-up (1) at preset height H place;
Be used for testing the intensity of sound I1 of noise frequency under 125Hz and the first microphone (2) of the intensity of sound I2 under 250Hz under described fan coil (7), described the first microphone (2) be arranged on described fan coil (7) air outlet under 1m place.
2. fan coil noise-measuring system as claimed in claim 1, it is characterized in that, also comprise when I1 and I2 are all less than 15 decibels or I1-I2≤0.5 decibel, judge the qualified decision maker of low-frequency noise, described decision maker is connected with described the first microphone (2).
3. fan coil noise-measuring system as claimed in claim 2, is characterized in that, also comprises for supporting the support of described the first microphone (2).
4. fan coil noise-measuring system as claimed in claim 2, is characterized in that, described preset height H is 2.7m.
5. fan coil noise-measuring system as claimed in claim 2, is characterized in that, also comprises the backwind tube (5) that can be connected with described fan coil (7) air inlet.
6. fan coil noise-measuring system as claimed in claim 5, is characterized in that, also comprises the damping screen (6) of the inflow point that is arranged on described backwind tube (5), and described damping screen (6) is 0.7m apart from the distance of described fan coil (7) air inlet.
7. fan coil noise-measuring system as claimed in claim 6, is characterized in that, also comprises the static pressure rings (4) being arranged in described backwind tube (5), and described static pressure rings (4) is 0.2m apart from the distance of described fan coil (7) air inlet.
8. fan coil noise-measuring system as claimed in claim 1, it is characterized in that, also comprise for testing the intensity of sound of noise frequency under 125Hz and the second microphone (3) of the intensity of sound under 250Hz of described fan coil (7) front lower place, described second microphone (3) is 1m with horizontal range and the vertical range of described air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420159213.4U CN203824643U (en) | 2014-04-02 | 2014-04-02 | Noise testing device for coil pipe of blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420159213.4U CN203824643U (en) | 2014-04-02 | 2014-04-02 | Noise testing device for coil pipe of blower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203824643U true CN203824643U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420159213.4U Expired - Fee Related CN203824643U (en) | 2014-04-02 | 2014-04-02 | Noise testing device for coil pipe of blower fan |
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| Country | Link |
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| CN (1) | CN203824643U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241545A (en) * | 2015-10-30 | 2016-01-13 | 李宗明 | Detection method and system of air-conditioning noises |
| CN112097385A (en) * | 2020-08-13 | 2020-12-18 | 浙江纳风净化技术有限公司 | Silencing pipe group |
| CN112113300A (en) * | 2020-08-13 | 2020-12-22 | 浙江纳风净化技术有限公司 | Campus fresh air installation method |
| CN112146256A (en) * | 2020-08-13 | 2020-12-29 | 浙江纳风净化技术有限公司 | Air pipeline silencing method |
| CN112504439A (en) * | 2020-12-08 | 2021-03-16 | 国网湖南省电力有限公司 | Method and device for improving online monitoring accuracy of transformer substation boundary noise |
-
2014
- 2014-04-02 CN CN201420159213.4U patent/CN203824643U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241545A (en) * | 2015-10-30 | 2016-01-13 | 李宗明 | Detection method and system of air-conditioning noises |
| CN112097385A (en) * | 2020-08-13 | 2020-12-18 | 浙江纳风净化技术有限公司 | Silencing pipe group |
| CN112113300A (en) * | 2020-08-13 | 2020-12-22 | 浙江纳风净化技术有限公司 | Campus fresh air installation method |
| CN112146256A (en) * | 2020-08-13 | 2020-12-29 | 浙江纳风净化技术有限公司 | Air pipeline silencing method |
| CN112113300B (en) * | 2020-08-13 | 2022-09-16 | 浙江纳风净化技术有限公司 | Campus fresh air installation method |
| CN112097385B (en) * | 2020-08-13 | 2022-09-16 | 浙江纳风净化技术有限公司 | Silencing pipe group |
| CN112146256B (en) * | 2020-08-13 | 2022-10-11 | 浙江纳风净化技术有限公司 | Air pipeline silencing method |
| CN112504439A (en) * | 2020-12-08 | 2021-03-16 | 国网湖南省电力有限公司 | Method and device for improving online monitoring accuracy of transformer substation boundary noise |
| CN112504439B (en) * | 2020-12-08 | 2023-03-03 | 国网湖南省电力有限公司 | Method and device for improving online monitoring accuracy of transformer substation boundary noise |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |