CN101526053B - Automatic alarm device of air cleaner - Google Patents
Automatic alarm device of air cleaner Download PDFInfo
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- CN101526053B CN101526053B CN2009100953459A CN200910095345A CN101526053B CN 101526053 B CN101526053 B CN 101526053B CN 2009100953459 A CN2009100953459 A CN 2009100953459A CN 200910095345 A CN200910095345 A CN 200910095345A CN 101526053 B CN101526053 B CN 101526053B
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Abstract
The invention discloses an alarm device, aiming at providing an automatic alarm device of an air cleaner used for an internal combustion engine. The device comprises an alarm unit, a signal generator unit and an A/D conversion unit; wherein the alarm unit is internally provided with a drive circuit connected with a relay, the relay is also connected with an alarm lamp or an buzzer or both; and the signal generator unit, the A/D conversion unit and the alarm unit are connected in sequence. With complete alarm function, the device can perform sound and light alarm at the same time, has high alarm property and high reliability, and can avoid false alarm; besides, the device has simple structure, small volume, flexible arrangement, and low manufacturing cost, is applicable for popularization, and can avoid vicious discharge caused by abnormal working of the internal combustion engine, thus having obvious environment protection effect and good public welfare.
Description
Technical field
The present invention relates to a kind of warning device, particularly be suitable for the internal-combustion engine automatic alarm device of air cleaner.
Background technique
Filter cleaner is the indispensable constituent element of machine operation device, is example with the internal combustion locomotive, and air-strainer is wherein just arranged, and oil filter and four big classes such as fuel filter, air-conditioning filter cleaner, former three generally are collectively referred to as " three filters ".The filtration that " three filters " undertakes engine aspirating system, lubrication system and combustion system medium respectively; air-conditioning filter cleaner then can be protected driver and related components; the working environment of their common protections and purification machinery equipment, thus increase work efficiency the working life of prolongation machine.
Take air-strainer to give an example, it is the important component part of engine aspirating system, and " nose " that just looks like human body is the same, for " health " of motor provides the first road barrier.It is not only, and motor is normal, lasting, the indispensable assembly of reliably working, and can directly have influence on power character, fuel economy and the working life of motor.If there is not the filtration of air-strainer, motor will suck the air that contains dust, particle in a large number, cause engine piston group and cylinder wear serious, bigger particle enters between piston and the cylinder, can cause serious " scuffing of cylinder bore " phenomenon, this is particularly serious in the rocky working environment of drying.Someone is by evidence, and with the motor of air filtration unit, the rate of wear of parts such as its cylinder sleeve, piston will not improve about 20 times.Air-strainer is to the induction noise and the exhaust smoke important influence of motor simultaneously.
In order to guarantee the normal use of air-strainer, need regularly cleaning or more renew cartridge (whenever travelling 3000 kilometers), but because the environmental difference of work is very big, for example the dust concentration of motor vehicle environment is 0.2mg/m under general road running condition
3～3mg/m
3, and in ambient dust concentration such as scenes, building site up to 0.5g/m
3～1.0g/m
3Only depend on to regularly clean or replace that air filtering core may cause the air inlet deficiency of motor in certain period, burning is insufficient, operating mode is relatively poor and oil consumption is excessive, cause that discharging is abominable, lambda sensor etc. is aging, causes environmental pollution.For fear of the generation of this situation, obstruction alarm device often all has been installed on the present motor, will report to the police reach the alarm pressure of regulation when intake pipe negative pressure after, remind the driver to clean or change.If to ignoring of stopping up, the increase gradually along with pressure difference so for a long time finally can cause air cleaner cartridge breakdown, causes engine life to shorten, even serious situation such as breakage, breaking-up.According to statistics, the early stage breakage 70% of engineering machinery engine is relevant with air-strainer.Therefore, should avoid the phenomenon that punctures to take place as much as possible.
But in some cases, puncture might just not take place through the process of stopping up in air-strainer.Such as under some bad working environment, if grains of sand slungshot etc. is mixed in the inlet stream, because filter paper material is normally made by papery, non-cotton fabric or chemical fibre material, and it is very thin for guaranteeing that circulation reduction flow resistance adds the building site usually, very easy quilt breaks up out duck eye, and expands to big hole very soon and puncture; In addition, some emergency case, the suction port end that happens suddenly and be attracted to the air inlet mouth of pipe or air-strainer owing to the getter action of suction port such as a plastic bag, moment produces a big pressure surge and causes the large deformation even the instantaneous breakdown of filter paper layer probably under bigger flow; Simultaneously, work engineering in view of motor, its intake process itself is exactly the process of a pulsation, high strength along with motor, high power, compact development trend, can increase gradually for the required air inflow of burning, the pulsation process can be more violent, strictness day by day along with Abgasgesetz, some The application of new technique also can exert an influence to air inlet, for example people such as Tomoya Aba has just mentioned a kind of variable vortex control valve SCV among the SAE2004-01-1316, SCV changes its opening degree along with operating mode, changing particularly working conditions change in operating mode will certainly be to causing the strong fluctuation situation of air inlet in violent.
Only considered in the obstruction alarm device of existing air-strainer to stop up and even to stop up and caused the situation that punctures for a long time, the puncture situation not being done one comprehensively considers, the warning device that uses can't realize puncturing the function of warning fully now, its functional and imperfection, therefore need a kind of can including of design to stop up and puncture two kinds of situations, the runnability of comprehensive monitoring air-strainer is also in time made the obstruction alarm device of prompting.
Summary of the invention
The objective of the invention is in order to fill up the blank of prior art, remedy the deficiency of existing air-strainer warning device, a kind of air-strainer that is applicable to is provided, and can reflect its runnability comprehensively and make the warning device of prompting.
In order to reach purpose of the present invention, the invention provides a kind of automatic alarm device of air cleaner, comprise alarm unit, the drive circuit that connects relay is set in the alarm unit, relay is also with warning light or buzzer is wherein at least a is connected; Also comprise: signal generating unit and A/D converting unit, signal generating unit, A/D converting unit are connected successively with alarm unit;
Described signal generating unit comprises: the cavity of a hollow, inside cavity are provided with a piston, and cavity is divided into two chambers; One end of cavity is communicated with air-strainer, and the other end of cavity is provided with at least one vent and is communicated to atmosphere; Establish sliding bar on the opposite side of piston, sliding bar passes the chamber wall of cavity termination and is connected a sheathed spring on the sliding bar between piston and the chamber wall with slide member on the potentiometer; Potentiometer and power supply are formed the closed-loop path, and the closed-loop path is connected with the A/D converting unit.
As a kind of improvement, on the closed-loop path that described potentiometer and power supply are formed a protective resistance is arranged.
As a kind of improvement, between described piston and the chamber wall seal ring is arranged, seal ring is located on the piston.
As a kind of improvement, also comprise the LED display that connects the D/A converting unit in the described alarm unit, the D/A converting unit links to each other with drive circuit.
As a kind of improvement, described warning device also comprises a micro-control unit, and the A/D converting unit is connected with alarm unit by the micro-control unit.
Beneficial effect of the present invention is:
1, air-strainer warning device warning function provided by the invention is complete.Air-strainer warning device in the past often has only the obstruction warning function, the pressure switch principles that adopt diaphragm spring or plunger type more, make contact when surpass reporting to the police restriction only, start warning device, and do not consider the puncture situation, the user mode that the present invention can make the driver observe air-strainer constantly by the LED display that is arranged in the operator cabin, the obstruction and the puncture degree of understanding air-strainer are for cleaning or change the information favourable that provides.
2, air-strainer warning device provided by the invention acoustooptic alarm simultaneously, the warning height.Bright, the buzzer call of warning light when reaching the generation of obstruction limit value allowable or puncture situation, acousto-optic is reported to the police simultaneously, reminds the driver to clean or the replacing air-strainer, prevents the generation of danger.For the safe and reliable use of air-strainer and the proper functioning of internal-combustion engine provide sound assurance.
3, air-strainer warning device provided by the invention can prevent false alarm and reliability height.Filtering by the inside, micro-control unit; in the time of can preventing that vehicle from travelling on abominable road conditions; vibration causes warning device to vibrate thereupon owing to significantly jolt; cause the wherein paroxysmal strenuous exercise of piston; make the transient current signal reach alarming value; produce a dither burr undesired signal, cause warning device to produce false alarm and bring error message, and be provided with the protective resistance device and prevent the excessive damage device of electric current in the circuit to the driver.
4, air-strainer warning device provided by the invention is simple in structure, volume is little, flexible arrangement.Mechanical structure only is made up of piston, sliding bar and spring etc., and changes the potentiometer resistance value according to the cavity pressure difference, so very small and exquisite being convenient to that device can be done installed and arranged.
5, air-strainer warning device cost provided by the invention is low, suitable promotes.Devices such as potentiometer are matured product, and cost is low, can make this newspaper alarm device cost lower, and for road has been paved in the marketization of the present invention, and the present invention is applicable to the supporting of various vehicles, and is widely applicable.
6, air-strainer warning device provided by the invention can prevent the abominable discharging that the internal-combustion engine malfunction brings, and has remarkable environmental effect and public and social interest.
Description of drawings
Fig. 1 is the principle schematic of patent of the present invention;
Fig. 2 is the structural representation of signal generating unit;
Fig. 3 is the circuit diagram of signal generating unit.
Fig. 4 is the stressed schematic representation of piston (laterally installing);
Fig. 5 is the stressed schematic representation of piston (vertical installation).
Among the figure: signal generating unit 1; A/D converting unit 2; micro-control unit 3; alarm unit 4; drive circuit 5; D/A converting unit 6; relay 7; LED display 8; warning light 9; buzzer 10; power supply 11; protective resistance 12; current signal is to the wiring point 13 of A/D converting unit; potentiometer 14; chamber wall 15; spring 16; vent 17; potentiometer wiring point 18; the pipeline 19 of air-strainer rear end; seal ring 20; piston 21; sliding bar 22; potentiometer wiring point 23; cavity 24.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail, but not as a limitation of the invention.
As shown in Figure 1, the air-strainer warning device in the present embodiment comprises: signal generating unit 1, A/D converting unit 2, micro-control unit 3 and alarm unit 4 link to each other successively.Comprise drive circuit 5, D/A converting unit 6, relay 7, LED display 8, warning light 9 and buzzer 10 in the alarm unit.Relay 7 is connected with buzzer 10 with warning light 9, and LED display 8 connects D/A converting unit 6, and D/A converting unit 6 is connected micro-control unit 3 with relay 7 by drive circuit 5.
As shown in Figure 2, signal generating unit 1 comprises: the cavity 24 of a hollow, cavity 24 inside are provided with a piston 21.The piston 21 of seal ring 23 sealings is divided into two chambers with cavity 24, since the existence of seal ring 20, the independent not UNICOM in two chambeies about can guaranteeing.One end of cavity 24 is communicated with the pipeline 19 of air-strainer rear end by threaded pipe, and the other end of cavity 24 is provided with several vents 17 and is communicated to atmosphere; Establish sliding bar 22 on the opposite side of piston 21, sliding bar 22 passes the chamber wall 15 of cavity 24 terminations, and is connected a sheathed spring 16 on the sliding bar 22 between piston 21 and the chamber wall 15 with slide member on the potentiometer 14; Potentiometer 14 is formed the closed-loop path with power supply 11 and protective resistance 12, and the closed-loop path is connected at wiring point 13 places of current signal to the A/D converting unit with A/D converting unit 2.Establish potentiometer wiring point 18,23 on the potentiometer.
The pressure of cavity 24 left chamber is through the gas pressure after the air-strainer filtration, and its right-hand member links by vent 17 and atmosphere, makes right chamber pressure remain barometric pressure.16 fixations of spring, an end is fixed on piston 21 right parts, and an other end is fixed on the right chamber bottom.Sliding bar 22 1 ends are fixed on piston 21 right parts, with piston 21 form whole, can with piston 21 associated movements, an other end is fixed on the slide member of potentiometer 14 after then passing chamber wall 15.Along with moving of sliding bar 22, the resistance of potentiometer 14 can corresponding changing.
As shown in Figure 3, power supply 11, protective resistance 12, potentiometer 14 are connected according to this and are formed the closed-loop path, produce current signal.It is characterized in that the current signal that produces changes along with the variation of potentiometer 14 resistances, is connected to A/D converting unit 2 after current signal is drawn.
As shown in Figure 4, piston 16 is subjected to spring force Fk, two cavity pressure difference Fp, wherein left cavity pressure is Fp1, right cavity pressure is Fp2, also be subjected to gravity G during non-horizontal installation, make a concerted effort is zero, piston 16 keeps balance, when two cavity pressure difference Fp changed, non-vanishing with joint efforts, piston 21 drives fixed sliding bar 22 can be along with moving, up to spring force Fk, two cavity pressure difference Fp when horizontal installation (non-also have G) when being zero with joint efforts once more, piston 21 and sliding bar 22 are with stop motion, and the resistance of potentiometer 14 no longer changes, and the current signal of drawing is stable once more.
When the present invention initially installs and uses, about two cavity pressure values equate that spring 16 is in the initial length that nature does not have the deformation length situation or overcomes piston gravity, the sliding bar 22 that is fixed on piston 21 right parts keeps motionless, the resistance of potentiometer 14 does not change, and it is constant that the current signal of drawing keeps; After air-strainer uses a period of time, chocking-up degree can change, the pressure in chamber, a left side can diminish thereupon gradually, about the pressure difference value in two chambeies can become big gradually, piston 21 will be under the driving of pressure difference to the left direction move, the sliding bar 22 that is cemented in piston 21 right parts can be along with to left movement, the resistance that drives potentiometer 14 changes, the current signal of drawing also can change thereupon, up to piston 21 once more stress balance after-current signal will no longer change; In the time of the situation of stopping up puncture or the appearance of sudden puncture situation, the pressure in chamber, a left side can become big suddenly, about the pressure difference value in two chambeies can diminish suddenly, piston 21 will move in the following direction to the right of spring 16, the sliding bar 22 that is cemented in the piston right part can move along with direction to the right, the resistance that drives potentiometer 14 changes toward opposite trend direction, the current signal of drawing also can be along with changing toward opposite trend, up to piston 21 once more stress balance after-current signal will no longer change.
The current signal that wiring point 13 from current signal to the A/D converting unit is drawn is through A/D converting unit 2, be converted to digital signal and be input to micro-control unit 3, through comparing with micro-control unit 3 the inside standard signals, delivery air filter cleaner state also judges whether alarm unit 4 works.Judge this moment when micro-control unit 3 and do not reach alarm setting value, then micro-control unit 3 output status signals change output signal into by D/A converting unit 6 after the power amplification of overdrive circuit 5, and current state is presented in the LED display 8; If the input signal process through micro-control unit 3 Shelving relatively finds still to have reached alarm setting value in the back with the standard signal of micro-control unit 3, then micro-control unit 3 sends alarm command, command signal makes relay 7 switch ons after the power amplification of overdrive circuit 5, warning light is 9 bright, buzzer 10 pipes, acousto-optic is reported to the police simultaneously, state signal is after the power amplification of overdrive circuit 5 simultaneously, change output signal into by D/A converting unit 6, current state of alarm is presented in the LED display 8.
The ECU unit the inside that A/D converting unit 2, micro-control unit 3, D/A converting unit 6, drive circuit 5 can be located at motor also can be located at a circuit the inside independently separately, and the LED display 8 in the alarm unit 4, warning light 8 and buzzer 10 place the appropriate location in the operator cabin.Wherein, the circuit design of the design of each program and demonstration and alarm unit etc. is conspicuous for present technique field personnel in the micro-control unit, does not need to pay creative work, therefore no longer describes in detail.
At last, it is also to be noted that what more than enumerate only is to be that example is introduced the specific embodiments of the invention framework with the air-strainer.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged, all distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (3)
1. an automatic alarm device of air cleaner comprises alarm unit, and the drive circuit that connects relay is set in the alarm unit, and relay is also with warning light or buzzer is wherein at least a is connected; It is characterized in that, also comprise: signal generating unit, A/D converting unit and micro-control unit, signal generating unit, A/D converting unit, micro-control unit are connected successively with alarm unit;
Described alarm unit also comprises D/A converting unit and LED display, and LED display connects the D/A converting unit, and the D/A converting unit is connected the micro-control unit with relay by drive circuit;
Described signal generating unit comprises: the cavity of a hollow, inside cavity are provided with a piston, and cavity is divided into two chambers; One end of cavity is communicated with air-strainer, and the other end of cavity is provided with at least one vent and is communicated to atmosphere; Piston on cavity is provided with a side of vent, establish sliding bar, sliding bar passes the chamber wall of cavity termination and is connected a sheathed spring on the sliding bar between piston and the chamber wall with slide member on the potentiometer; Potentiometer and power supply are formed the closed-loop path, and the closed-loop path is connected with the A/D converting unit.
2. automatic alarm device of air cleaner according to claim 1 is characterized in that, on the closed-loop path that described potentiometer and power supply are formed a protective resistance is arranged.
3. automatic alarm device of air cleaner according to claim 1 is characterized in that, between described piston and the chamber wall seal ring is arranged, and seal ring is located on the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100953459A CN101526053B (en) | 2009-01-08 | 2009-01-08 | Automatic alarm device of air cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100953459A CN101526053B (en) | 2009-01-08 | 2009-01-08 | Automatic alarm device of air cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101526053A CN101526053A (en) | 2009-09-09 |
| CN101526053B true CN101526053B (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100953459A Expired - Fee Related CN101526053B (en) | 2009-01-08 | 2009-01-08 | Automatic alarm device of air cleaner |
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| Country | Link |
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| CN (1) | CN101526053B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757237A (en) * | 2018-06-15 | 2018-11-06 | 新乡市新鹰机械有限公司 | A kind of air filter alarm |
| CN113738546B (en) * | 2020-05-29 | 2022-07-15 | 北汽福田汽车股份有限公司 | Air filter blockage alarm triggering device, alarm system, engine and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698408B1 (en) * | 1994-08-23 | 1998-09-23 | Filterwerk Mann + Hummel Gmbh | Device for the indication of the contamination level of a filter |
| DE19710981A1 (en) * | 1997-03-17 | 1998-10-01 | Mannesmann Vdo Ag | Air filter for internal combustion engine |
| CN2467815Y (en) * | 2000-11-03 | 2001-12-26 | 上海滤清器厂 | Air filter for diesel engine generator |
| CN2760268Y (en) * | 2004-12-04 | 2006-02-22 | 重庆宗申技术开发研究有限公司 | Lifetime alarm for air cleaner of minitype gas engine |
| CN201148928Y (en) * | 2007-07-20 | 2008-11-12 | 刘战红 | Air filter resistance force warning apparatus |
| CN201347823Y (en) * | 2009-01-08 | 2009-11-18 | 浙江大学 | Automatic alarm device of air filter |
-
2009
- 2009-01-08 CN CN2009100953459A patent/CN101526053B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698408B1 (en) * | 1994-08-23 | 1998-09-23 | Filterwerk Mann + Hummel Gmbh | Device for the indication of the contamination level of a filter |
| DE19710981A1 (en) * | 1997-03-17 | 1998-10-01 | Mannesmann Vdo Ag | Air filter for internal combustion engine |
| CN2467815Y (en) * | 2000-11-03 | 2001-12-26 | 上海滤清器厂 | Air filter for diesel engine generator |
| CN2760268Y (en) * | 2004-12-04 | 2006-02-22 | 重庆宗申技术开发研究有限公司 | Lifetime alarm for air cleaner of minitype gas engine |
| CN201148928Y (en) * | 2007-07-20 | 2008-11-12 | 刘战红 | Air filter resistance force warning apparatus |
| CN201347823Y (en) * | 2009-01-08 | 2009-11-18 | 浙江大学 | Automatic alarm device of air filter |
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| Publication number | Publication date |
|---|---|
| CN101526053A (en) | 2009-09-09 |
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Granted publication date: 20110914 Termination date: 20120108 |