CN1329726C - Method for detecting neatness of a strainer - Google Patents
Method for detecting neatness of a strainer Download PDFInfo
- Publication number
- CN1329726C CN1329726C CNB2004100080337A CN200410008033A CN1329726C CN 1329726 C CN1329726 C CN 1329726C CN B2004100080337 A CNB2004100080337 A CN B2004100080337A CN 200410008033 A CN200410008033 A CN 200410008033A CN 1329726 C CN1329726 C CN 1329726C
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- dust
- filter screen
- fan
- rotating speed
- control voltage
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 67
- 238000009434 installation Methods 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to a method for detecting neatness of a strainer. A strainer is arranged at the point of the air inlet or the air outlet of a fan. In the method, voltage for controlling rotational speed is firstly output to the fan, and air flow driven during the rotation of the fan flows to the strainer; the actual rotational speed of the fan is subsequently detected; then, a dust actual value f1 is calculated according to the actual rotational speed and the voltage for controlling the rotational speed, the dust upper limit value fm of the strainer is subsequently provided, and then, the neatness of the strainer is determined according to the dust actual value f1 and the dust upper limit value fm.
Description
Technical field
The present invention is relevant for a kind of method that is used to detect the clean degree of filter screen, and particularly relevant for a kind of according to rotating speed control voltage that fan received and the actual speed exported method with the clean degree of decision filter screen.
Background technology
In the epoch now that development in science and technology is maked rapid progress, electronic installation has become an indispensable part in modern's life.In these electronic installations, as desktop PC, mobile computer (notebook) and projector (projector) etc., the quality of its heat-sinking capability often has influence on the stability of System Operation and the tenure of use of product.With mobile computer, for the heat energy dissipation apace that computer system is produced, be equipped with fan in the computing machine usually, make that computer system can normal operation under suitable temperature environment.Generally speaking, be provided with a filter screen at the air inlet or the air outlet place of fan, the position of filter screen may be on the inside or the surface of electronic installation, and when fan rotated, the air-flow that is driven can flow to this filter screen.When filter screen was not accumulated dust, the actual speed of fan can be controlled voltage corresponding to the rotating speed that central processing unit is exported.That is to say that central processing unit is exported rotating speed control voltage to fan, this rotating speed control voltage is corresponding to a desired speed, and the actual speed of fan equates with desired speed.
In the fan rotating process, filter screen all can be stained with sticking dust usually.When filter screen is stained with sticking too much dust, can will tail off by the air-flow of filter screen.At this moment, the pairing desired speed of the actual speed specific speed of fan control voltage is also fast.Thus, fan can't be discharged heat energy outside electronic installation effectively, and the operational effectiveness that influences electronic installation is very big.Unless the user just initiatively removes to clear up filter screen at set intervals, not so be difficult to be alerted to filter screen and be stained with sticking too much dust, and need to clean or change.Especially be arranged at the filter screen of the inside of electronic installation, the user can't can learn that such test mode is pretty troublesome for the user after electronic installation need being taken apart by the external inspection of the electronic installation clean degree to filter screen at all.Therefore, how developing the technology that a cover can initiatively remind the user need clean the filter screen with too much dust, will be that instant the need solves.
Summary of the invention
In view of this, purpose of the present invention is exactly that a kind of method that is used to detect the clean degree of filter screen is being provided.
According to purpose of the present invention, a kind of method that is used to detect the clean degree of filter screen is proposed, filter screen is arranged at the air inlet or the air outlet place of fan.In the method, at first, export rotating speed control voltage to fan, and the air flow direction filter screen that driven when rotating of fan.Then, detect an actual speed of fan.Then, according to actual speed and rotating speed control voltage, calculate a dust actual value f1.One dust higher limit fm of filter screen then, is provided.Then, according to dust actual value f1 and dust higher limit fm, with the clean degree of decision filter screen.
The present invention uses the design that the actual speed that fan exports and the rotating speed that fan received control voltage decide the clean degree of filter screen, can initiatively remind the user need clean filter screen, avoid blocking the heat extraction effect that influences fan because of filter screen with too much dust.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Fig. 1 represents the synoptic diagram according to the electronic installation of preferred embodiment of the present invention.
Fig. 2 represents the schematic flow sheet of method of clean degree that is used to detect filter screen according to preferred embodiment of the present invention.
Fig. 3 represents the schematic flow sheet according to the establishing method of the default table of preferred embodiment of the present invention.
The rectangular coordinates figure of the state when Fig. 4 represents dust actual value f1 less than dust higher limit fm.
Fig. 5 represents to have because of filter screen the rectangular coordinates figure of the state of too much dust when causing dust actual value f1 greater than dust higher limit fm.
The drawing reference numeral explanation
10: electronic installation
11: control module
12: fan
13: filter screen
Embodiment
Please refer to Fig. 1, its expression is according to the synoptic diagram of the electronic installation of preferred embodiment of the present invention.In Fig. 1, electronic installation 10 comprises a control module 11, one fans 12 and a filter screen 13 at least.Control module 11 outputs one rotating speed control voltage A is to fan 12, and rotating speed control voltage A is corresponding to a desired speed.Receive rotating speed control voltage A aft-fan 12 and begin to rotate, control module 11 detects an actual speed B of fans 12 at this moment.Filter screen 13 is arranged at the air outlet or the air intake vent place of fan 12, and the air flow direction filter screen 13 that driven when rotating of fan 12.Wherein, control module 11 decides the clean degree of filter screen 13 according to actual speed B and rotating speed control voltage A.
Please refer to Fig. 2, its expression is according to the schematic flow sheet of method of clean degree that is used to detect filter screen of preferred embodiment of the present invention.Please also refer to Fig. 1 and Fig. 2, in step 21, control module 11 outputs one rotating speed control voltage A rotates to order about fan 12 to fan 12.The air flow direction filter screen 13 that fan 12 is driven when rotating.In addition, rotating speed control voltage A is corresponding to a desired speed.Then, enter in the step 22, control module 11 detects the actual speed B that fan 12 is exported.
Then, enter in the step 23, control module 11 calculates a dust actual value f1 according to actual speed B and rotating speed control voltage A.Dust actual value f1 is the ratio X of actual speed B and rotating speed control voltage A, as X=B/A (rpm/V).
Dust actual value f1 calculates with following method: at first, the actual speed B that is detected is scaled a rotational pulse frequency C.Then, calculate the ratio of rotational pulse frequency C and rotating speed control voltage A, as C/A (Hz/V), to produce dust actual value f1.
After treating that dust actual value f1 is calculated, promptly enter in the step 24, control module 11 provides a dust higher limit fm of filter screen 13.Wherein, dust higher limit fm defaultly showing to table look-up to learn with one according to rotating speed control voltage A.Should calculate and get by following manner by default table, as shown in Figure 3.At first, in step 31, use a filter screen with known ash dust quantity, and this filter screen belonged to the defective products of needs cleaning because of accumulating too much dust, so, this filter screen is considered as having the filter screen of dust higher limit fm.In step 31, record is input into the rotating speed control voltage a1 of fan 12.Then, enter in the step 32, detect the actual speed e1 of fan 12.Then, enter in the step 33, calculate the ratio z1 of a corresponding rotating speed and voltage, as z1=e1/a1.Then, enter in the step 34, under the situation of different rotating speeds control voltage a2-an, calculate the ratio z2-zn of each corresponding rotating speed and voltage, and record composition one default table, the computing method of this default table are whole to come to an end.
Rotating speed can be considered the fan desire to the ratio z of voltage air-flow is transported by filter screen required " energy ".The amount of dust of accumulating on filter screen is many more, and the fan desire is transported air-flow by filter screen required " energy " also big more, so rotating speed is directly proportional with amount of dust to the ratio z of voltage, therefore, z represents the amount of dust of accumulating on the filter screen with this ratio.Shown in the 4th～5 figure, abscissa is expressed as rotating speed control voltage (V), and ordinate is expressed as the dust values of filter screen 13, then should preset the datum curve D that the data of showing to be noted down will form a dust higher limit fm.
Then, method of the present invention enters step 25, and at this moment, control module 11 is according to dust actual value f1 and dust higher limit fm, and with the clean degree of decision filter screen 13, this method comes to an end eventually.As shown in Figure 4, be under the state of A at rotating speed control voltage, according to datum curve D, Ci Shi dust higher limit fm as can be known.In addition, actual speed B and the rotating speed control voltage A by fan 12 can calculate dust actual value f1.As dust actual value f1 during less than dust higher limit fm, expression filter screen 13 be stained with sticking amount of dust and be lower than the dust higher limit, do not need to remind the user to remove to clean filter screen 13.
Again with reference to figure 5, after the contrast datum curve D, if when finding dust actual value f1 more than or equal to dust higher limit fm, promptly to cause actual speed B specific speed to control the pairing desired speed of voltage A also fast because of having too much dust for filter screen 13.At this moment, control module 11 will order about electronic installation 10 and send a caution signal or expression filter screen 13 caution signal that need be cleaned that an expression filter screen 13 has too much dust.Wherein, above-mentioned caution signal is the cresset that other elements sent, a sound or a screen display (on screen display, OSD) signal that control module 11 orders about electronic installation 10.
Yet those skilled in the art can also understand that technology of the present invention is not confined to this, and for example, electronic installation 10 is desktop PC, mobile computer (notebook) and projector (projector) etc.In addition, the method that is used to detect the clean degree of filter screen of the present invention more is applied to any electronic installation with fan and filter screen, as air conditioner, warming machine, dehumidifier, air filter and air conditioner.
The above embodiment of the present invention is disclosed to be used to detect the method for the clean degree of filter screen, actual speed that it is exported with fan and the rotating speed that fan was received control voltage decide the design of the clean degree of filter screen, can initiatively remind the user need clean filter screen, avoid blocking the heat extraction effect that influences fan because of filter screen with too much dust.
In sum; though the present invention with a preferred embodiment openly as above; so it is not to be used to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can carry out various changes and modification, so protection scope of the present invention is as the criterion when looking the claim restricted portion that is proposed.
Claims (13)
1. method that is used to detect a clean degree of a filter screen, this filter screen is arranged at the air inlet or the air outlet place of a fan, and this method comprises:
Export rotating speed control voltage to this fan, and this filter screen of air flow direction of being driven when rotating of this fan;
Detect an actual speed of this fan;
According to this actual speed and this rotating speed control voltage, calculate a dust actual value f1;
One dust higher limit fm of this filter screen is provided; And
According to this dust actual value f1 and this dust higher limit fm, to determine should totally spending of this filter screen.
2. the method for claim 1 wherein should also comprise in deciding step of clean degree:
As this dust actual value f1 during, send the caution signal that this filter screen of expression has too much dust more than or equal to this dust higher limit fm.
3. the method for claim 1 wherein should also comprise in deciding step of clean degree:
As this dust actual value f1 during, send the caution signal that this filter screen of expression has too much dust greater than this dust higher limit fm.
4. the method for claim 1 wherein should also comprise in deciding step of clean degree:
As this dust actual value f1 during, send the caution signal that this filter screen of expression need be cleaned greater than this dust higher limit fm.
5. the method for claim 1 wherein should also comprise in deciding step of clean degree:
As this dust actual value f1 during, send the caution signal that this filter screen of expression need be cleaned more than or equal to this dust higher limit fm.
6. method as claimed in claim 5, wherein this caution signal is a cresset.
7. method as claimed in claim 5, wherein this caution signal is a sound.
8. method as claimed in claim 5, wherein this filter screen is arranged in the electronic installation, and this caution signal is a screen display signal of this electronic installation.
9. the method for claim 1, wherein this this rotating speed control voltage is corresponding to a desired speed.
10. the method for claim 1, wherein this dust actual value f1 is the ratio of this actual speed and this rotating speed control voltage.
11. the method for claim 1, wherein this dust actual value f1 calculates with following method:
This actual speed that is detected is scaled a rotational pulse frequency; And
Calculate the ratio of this rotational pulse frequency and this rotating speed control voltage, to produce this dust actual value f1.
12. the method for claim 1, wherein this dust higher limit fm tables look-up with a default table according to this rotating speed control voltage and learns that wherein, this default table record and different rotating speeds are controlled corresponding this dust higher limit of voltage fm.
13. method as claimed in claim 12 wherein should be calculated and be got by following manner by default table:
Have in this filter screen under the situation of a dust higher limit of presetting, record is input into this rotating speed control voltage in this fan;
Detect this actual speed of this fan;
Calculate the ratio of a corresponding rotating speed and voltage, to obtain pairing this dust higher limit of this rotating speed control voltage fm; And
Under the situation of different rotating speeds control voltage, calculate the respectively ratio of this corresponding rotating speed and voltage, and record is formed and should defaultly be shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100080337A CN1329726C (en) | 2004-03-08 | 2004-03-08 | Method for detecting neatness of a strainer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100080337A CN1329726C (en) | 2004-03-08 | 2004-03-08 | Method for detecting neatness of a strainer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1667393A CN1667393A (en) | 2005-09-14 |
| CN1329726C true CN1329726C (en) | 2007-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100080337A Expired - Lifetime CN1329726C (en) | 2004-03-08 | 2004-03-08 | Method for detecting neatness of a strainer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1329726C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140190240A1 (en) * | 2011-08-04 | 2014-07-10 | Telefonaktiebolaget L M Ericsson (Publ) | Method and device for detecting clogging of a filter |
| CN103940630B (en) * | 2014-04-22 | 2017-01-11 | 深圳华宏联创科技有限公司 | Failure detection method of HEPA filter of air purifier |
| CN106482283A (en) * | 2015-08-28 | 2017-03-08 | 苏州三星电子有限公司 | A kind of intelligent reminding cleans the apparatus and method of air-conditioning filter net |
| CN106776205A (en) * | 2016-12-01 | 2017-05-31 | 重庆诚硕科技有限公司 | A kind of cabinet with warning function |
| CN107504634B (en) * | 2017-08-03 | 2020-02-11 | 广东美的制冷设备有限公司 | Method and device for detecting cleanliness of filter screen, air conditioner and readable storage medium |
| CN108444045A (en) * | 2018-02-11 | 2018-08-24 | 广东美的环境电器制造有限公司 | The determination method and device of strainer service life, clarifier, storage medium |
| CN114020564B (en) * | 2021-10-27 | 2023-11-14 | 苏州浪潮智能科技有限公司 | Dust monitoring device of server and server |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86202513U (en) * | 1986-04-23 | 1987-08-26 | 上海市染料研究所 | Air borne powder meter |
| JPH10122716A (en) * | 1996-10-23 | 1998-05-15 | Nec Tohoku Ltd | Cooling fan |
| CN2425335Y (en) * | 2000-04-17 | 2001-03-28 | 海尔集团公司 | Blast volume controller for condenser of showcase |
| KR100360427B1 (en) * | 2000-05-12 | 2002-11-08 | 주식회사 엘지이아이 | Air pollution sensor of air cleaner |
| JP2004063993A (en) * | 2002-07-31 | 2004-02-26 | Seiko Epson Corp | Method of warning filter replacement and electronic equipment equipped with filter replacement warning mechanism |
-
2004
- 2004-03-08 CN CNB2004100080337A patent/CN1329726C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86202513U (en) * | 1986-04-23 | 1987-08-26 | 上海市染料研究所 | Air borne powder meter |
| JPH10122716A (en) * | 1996-10-23 | 1998-05-15 | Nec Tohoku Ltd | Cooling fan |
| CN2425335Y (en) * | 2000-04-17 | 2001-03-28 | 海尔集团公司 | Blast volume controller for condenser of showcase |
| KR100360427B1 (en) * | 2000-05-12 | 2002-11-08 | 주식회사 엘지이아이 | Air pollution sensor of air cleaner |
| JP2004063993A (en) * | 2002-07-31 | 2004-02-26 | Seiko Epson Corp | Method of warning filter replacement and electronic equipment equipped with filter replacement warning mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1667393A (en) | 2005-09-14 |
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| C14 | Grant of patent or utility model | ||
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Owner name: QISDA TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BENQ CORPORATION. Effective date: 20100408 |
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Free format text: CORRECT: ADDRESS; FROM: TAOYUAN COUNTY, TAIWAN PROVINCE TO: TAOYUAN COUNTY, TAIWAN PROVINCE, CHINA |
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Effective date of registration: 20100408 Address after: China Taiwan Taoyuan County Patentee after: Qisda Corp. Address before: Taoyuan County of Taiwan Province Patentee before: Benq Corp. |
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Granted publication date: 20070801 |