CN201868860U - Overdischarge protective circuit of handheld dust collector - Google Patents
Overdischarge protective circuit of handheld dust collector Download PDFInfo
- Publication number
- CN201868860U CN201868860U CN2010206319200U CN201020631920U CN201868860U CN 201868860 U CN201868860 U CN 201868860U CN 2010206319200 U CN2010206319200 U CN 2010206319200U CN 201020631920 U CN201020631920 U CN 201020631920U CN 201868860 U CN201868860 U CN 201868860U
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- storage battery
- resistance
- operational amplifier
- relay
- direct current
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Abstract
The utility model discloses an overdischarge protective circuit of a handheld dust collector, which is characterized by comprising a storage battery power supply unit, a storage battery undervoltage comparison unit, a relay actuating control unit, a circuit protective unit, a work indicating unit, a switch control unit and a storage battery charging interface unit. The battery undervoltage comparison unit monitors the working voltage of a storage battery at any time and compares the working voltage with a set threshold voltage, when the voltage at two ends of the storage battery is smaller than the threshold voltage, an operational amplifier U1 triggers a one-way silicon controlled rectifier TR1 for conduction, a relay K1 is disconnected through the conduction of the one-way silicon controlled rectifier, direct-current motors M1 and M2 are tripped off from a main power supply loop, once the circuit is subjected to undervoltage protection, the power supply can not be recovered automatically even if the battery voltage recovers to be larger than the threshold voltage, and the power supply can be recovered by disconnecting a switch S1 and then connecting the switch again, therefore, the storage battery is protected from repeatedly working under an undervoltage state, and the function of automatic cut-off of the storage battery in undervoltage state can be achieved, so that the service life of the storage battery can be greatly prolonged.
Description
Technical field
The utility model relates to a kind of hand-held cleaners over circuit.
Background technology
Hand-held cleaners all be unable to do without storage battery power supply; traditional hand-held cleaners does not mostly have the battery over-discharge protection circuit or exists some shortcomings such as the over circuit is loaded down with trivial details, poor stability; yet the characteristic of storage battery requires storage battery not work under over-discharge situation, otherwise will have a strong impact on the useful life of storage battery.
The utility model content
The utility model purpose is: a kind of simple and reliable battery overdischarge protective circuit is provided, thereby prolongs the useful life of storage battery.
The technical solution of the utility model is: a kind of hand-held cleaners over circuit; it is characterized in that; comprise: storage battery under voltage comparing unit, actuating of relay control unit and circuit protection unit; described storage battery under voltage comparing unit with the operating voltage of batteries and with the preset threshold voltage ratio; judge whether to occur under-voltage; in case it is under-voltage; to signal to actuating of relay control unit, the control circuit protected location quit work motor after actuating of relay control unit was received the signal that storage battery under voltage comparing unit sends.
Further, described hand-held cleaners over circuit also comprises charge in batteries interface unit and battery power supply unit.
Further, described hand-held cleaners over circuit also comprises the work indicating member, and described work indicating member can be indicated the operating state of entire circuit.
Further, described storage battery under voltage comparing unit comprises operational amplifier U1, resistance R 1, R2, R3, R7, capacitor C 1, C2, diode D1, the power end of described operational amplifier U1 is via R7, control switch S1 is connected storage battery B1 two ends, the earth terminal of operational amplifier U1 is connected to the negative pole of storage battery B1, be connected on the power supply and the earth terminal of operational amplifier after resistance R 3 and the D1 series connection, the IN+ input of operational amplifier is connected the position that R3 links to each other with D1, resistance R 1 and capacitor C 1 in parallel and then and resistance R 2 series connections at power supply and the earth terminal of operational amplifier U1, the IN-input of operational amplifier is connected on the connecting place of resistance R 1 and resistance R 2.
Further, described actuating of relay control unit comprises resistance R 4, R5, R6, R8, capacitor C 3, one-way SCR TR1 and NPN triode Q1, Q2, one end of described resistance R 4 links to each other with the power supply of operational amplifier U1, the other end links to each other with the output of operational amplifier U1, a wherein end of resistance R 5, the other end of resistance R 5 is connected to the negative pole of storage battery B1 via resistance R 6, one end of resistance R 4 is connected to the anode of storage battery B1 via resistance R 7, and the in succession base stage of NPN triode Q1 of the other end is connected to the negative pole of storage battery B1 then by one-way SCR TR1; The trigger electrode of one-way SCR TR1 is connected to the node that resistance R 5 links to each other with R6, capacitor C 3 is connected between the negative pole of the trigger electrode of one-way SCR TR1 and storage battery B1, the in succession collector electrode of NPN triode Q2 of the collector electrode of NPN triode Q1 is connected to the wherein end of the control coil of relay K 1 then, the emitter of NPN triode Q1 is connected to the base stage of NPN triode Q2, and the emitter of NPN triode Q2 is connected to the negative pole of storage battery B1.
Further, described circuit protection unit comprises diode D2, D3, D4, fuse F1; The in succession end of coil of relay K 1 of the negative pole of described diode D2 is connected to the anode of storage battery B1 via control switch S1, the positive pole of diode is connected to the other end of the coil of relay K 1, the anode that the negative pole of diode D3 is connected to direct current machine M1 is connected to the anode of storage battery via control switch S1, the negative terminal that the positive pole of diode D3 is connected to direct current machine M1 is connected to the negative pole of storage battery B1 via the contact of relay K 1, the negative pole of diode D4 is connected to the anode of direct current machine M2 via fuse F1, control switch S2, S3 is connected to the anode of storage battery B1, the negative terminal that the positive pole of diode D4 is connected to direct current machine M2 is connected to the negative pole of storage battery B1 via the contact of relay K 1, and fuse F1 is connected in the middle of storage battery B1 and the major loop that direct current machine M2 links to each other.
Further, described circuit working indicating member comprises resistance R 9, R10, indicator light LED1, LED2; The described R9 indicator light LED1 that connecting is connected in parallel on direct current machine M1 two ends then, and the R10 indicator light LED that connecting is connected in parallel on direct current machine M2 two ends then.
Further; described hand-held cleaners over circuit also comprises switch control unit; described switch control unit comprises switch S 1, S2, and described switch S 1 is connected in the middle of the loop of storage battery and direct current machine M1, and S2 is connected in the middle of the loop of storage battery and direct current machine M2.
Operation principle: the storage battery power supply module provides working power for system, operational amplifier U1 was comparing the voltage at storage battery B1 two ends in real time after mains switch S1 connected, if the supply voltage of storage battery B1 is higher than threshold voltage, comparator U1 output low level, not conducting of one-way SCR TR1, the base stage of NPN triode Q1 is a high level, NPN triode Q1, Q2 conducting, relay K 1 adhesive, the power supply of storage battery B1 is direct current machine M1, M2 power supply by relay K 1, and power supply indicator LED1, LED2 are indicating the break-make situation of direct current machine M1, M2 respectively.
The core devices of voltage comparison unit: operational amplifier U1 is connected to the anode of storage battery B1 by R7; the IN+ input of operational amplifier U1 is connecting the anode of diode D1; because the conducting voltage perseverance of diode is 0.7 volt; so the IN+ input terminal voltage perseverance of operational amplifier U1 is 0.7 volt; the IN-input of operational amplifier U1 is connected to divider resistance R1; the node that R2 links to each other; the voltage that resistance R 2 is divided in the time of storage battery B1 electric weight abundance is above 0.7 volt; operational amplifier U1 output low level; the voltage that R2 is got in the time of the accumulator electric-quantity deficiency is less than 0.7 volt; operational amplifier U1 exports high level; by the current supply circuit that relay control unit removes to cut off storage battery B1, the protection storage battery can overdischarge.
Relay control unit mainly is made up of one-way SCR TR1 and accessory circuit, in the time of the accumulator electric-quantity abundance, operational amplifier U1 output low level, the triggering pin of one-way SCR TR1 is a low level, not conducting of one-way SCR TR1, the base stage of NPN triode Q1 is a high level, NPN triode Q1, Q2 conducting, that the coil of relay K 1 gets is electric, the contact adhesive of relay K 1, direct current machine M1, the M2 work of switching on; In the time of storage battery B1 electric weight deficiency, operational amplifier U1 exports high level, the triggering of one-way SCR TR1 is high level very, TR1 is conducting over the ground, the base stage of NPN triode Q1 is a low level, NPN triode Q1, Q2 oppositely end, and the control coil dead electricity of relay K 1, the contact of relay K 1 disconnect, and direct current machine M1, M2 quit work.
The utility model has the advantages that:
1. the utility model uses hardware circuit to detect the electric current of storage battery, and the power supply that cuts off direct current machine M1, M2 when the storage battery under voltage reliably, thereby has protected the storage battery can overdischarge, has effectively prolonged the useful life of hand-held cleaners.
2. the utility model interference free performance is superior; with low cost; in case and after the under voltage protection; even storage battery has recovered some voltages again; this circuit can remain on dissengaged positions with direct current machine M1, M2; thereby the phenomenon that self discharge repeatedly can not occur is greatly improved compared with traditional protective circuit.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the block diagram of the utility model hand-held cleaners over circuit.
Fig. 2 is the circuit diagram of the utility model hand-held cleaners over circuit.
Embodiment
Embodiment: hand-held cleaners over circuit as shown in Figure 1 comprises that storage battery power supply unit and storage battery under voltage comparing unit, actuating of relay control unit, circuit protection unit, work indicating member, switch control unit, charge in batteries interface unit form jointly.
Further combined with shown in Figure 2; storage battery under voltage comparing unit is by operational amplifier U1 described in the above-mentioned hand-held cleaners over circuit; resistance R 1; R2; R3; R7; capacitor C 1; C2; diode D1 forms jointly; the power end of wherein said operational amplifier U1 is via R7; control switch S1 is connected storage battery B1 two ends; the earth terminal of operational amplifier U1 is connected to the negative pole of storage battery B1; be connected on the power supply and the earth terminal of operational amplifier after resistance R 3 and the D1 series connection; the IN+ input of operational amplifier is connected the position that R3 links to each other with D1; resistance R 1 and capacitor C 1 in parallel and then and resistance R 2 series connections at power supply and the earth terminal of operational amplifier U1, the IN-input of operational amplifier is connected on the connecting place of resistance R 1 and resistance R 2.Storage battery provides working power for operational amplifier U1 after by resistance R 7 step-downs, the voltage perseverance of the IN+ end of operational amplifier U1 is 0.7 volt, after the voltage of the IN-end of operational amplifier U1 then is voltage process resistance R 7 step-downs of storage battery, resistance R 1 obtains with the R2 dividing potential drop, operational amplifier U1 output low level when the voltage of the IN-of operational amplifier U1 end is higher than 0.7 volt in the time of the accumulator electric-quantity abundance, the voltage that R2 is got in the time of the accumulator electric-quantity deficiency is less than 0.7 volt, operational amplifier U1 exports high level, the current supply circuit that removes to cut off storage battery B1 by relay control unit.
Actuating of relay control unit is by resistance R 4 described in the above-mentioned hand-held cleaners over circuit; R5; R6; R8; capacitor C 3; one-way SCR TR1 and NPN triode Q1; Q2 forms jointly; one end of wherein said resistance R 4 links to each other with the power supply of operational amplifier U1; the output of the other end and operational amplifier U1; a wherein end of resistance R 5 links to each other; the other end of resistance R 5 is connected to the negative pole of storage battery B1 via resistance R 6; one end of resistance R 4 is connected to the anode of storage battery B1 via resistance R 7, and the in succession base stage of NPN triode Q1 of the other end is connected to the negative pole of storage battery B1 then by one-way SCR TR1.The trigger electrode of one-way SCR TR1 is connected to the node that resistance R 5 links to each other with R6, capacitor C 3 is connected between the negative pole of the trigger electrode of one-way SCR TR1 and storage battery B1, the in succession collector electrode of NPN triode Q2 of the collector electrode of NPN triode Q1 is connected to the wherein end of the control coil of relay K 1 then, the emitter of NPN triode Q1 is connected to the base stage of NPN triode Q2, and the emitter of NPN triode Q2 is connected to the negative pole of storage battery B1.In the time of the accumulator electric-quantity abundance, operational amplifier U1 output low level, the triggering pin of one-way SCR TR1 is a low level, not conducting of one-way SCR TR1, the base stage of NPN triode Q1 is a high level, contact adhesive electric, relay K 1 that NPN triode Q1, Q2 conducting, the coil of relay K 1 get, direct current machine M1, the M2 work of switching on; In the time of storage battery B1 electric weight deficiency, operational amplifier U1 exports high level, the triggering of one-way SCR TR1 is high level very, TR1 is conducting over the ground, the base stage of NPN triode Q1 is a low level, NPN triode Q1, Q2 oppositely end, and the control coil dead electricity of relay K 1, the contact of relay K 1 disconnect, and direct current machine M1, M2 quit work.
Circuit protection unit is made of jointly diode D2, D3, D4, fuse F1 described in the above-mentioned hand-held cleaners over circuit; The in succession end of coil of relay K 1 of the negative pole of described diode D2 is connected to the anode of storage battery B1 via control switch S1, the positive pole of diode is connected to the other end of the coil of relay K 1, the anode that the negative pole of diode D3 is connected to direct current machine M1 is connected to the anode of storage battery via control switch S1, the negative terminal that the positive pole of diode D3 is connected to direct current machine M1 is connected to the negative pole of storage battery B1 via the contact of relay K 1, the negative pole of diode D4 is connected to the anode of direct current machine M2 via fuse F1, control switch S2, S3 is connected to the anode of storage battery B1, the negative terminal that the positive pole of diode D4 is connected to direct current machine M2 is connected to the negative pole of storage battery B1 via the contact of relay K 1, and fuse F1 is connected in the middle of storage battery B1 and the major loop that direct current machine M2 links to each other.Can produce the reverse voltage of a moment at coil when the coil of relay K 1 disconnects, cause the puncture of NPN triode Q1, Q2 easily, diode D2 can discharge the reverse voltage of moment, thereby protection triode Q1, Q2 are not breakdown; Direct current machine M1, M2 can produce the reverse voltage of a very high moment in the moment that stops, and diode D3, D4 can sponge reverse voltage, and other components and parts are not breakdown in the protective circuit; Fuse F1 can fuse in short circuit, prevents to burn out other components and parts.
The circuit working indicating member is by resistance R 9, R10 described in the above-mentioned hand-held cleaners over circuit; indicator light LED1, LED2 form jointly; the described R9 indicator light LED1 that connecting is connected in parallel on direct current machine M1 two ends then, and the R10 indicator light LED that connecting is connected in parallel on direct current machine M2 two ends then.Direct current machine M1, M2 get electricly when switch S 1 or S2 closure and storage battery B1 electric weight are sufficient, and LED1, LED2 indicator light are lighted, direct current machine M1, M2 dead electricity when switch S 1, S2 disconnect, and LED1, LED2 indicator light extinguish; Switch control unit is made of jointly switch S 1, S2 described in the above-mentioned hand-held cleaners over circuit, and described switch S 1 is connected in the middle of the loop of storage battery and direct current machine M1, and S2 is connected in the middle of the loop of storage battery and direct current machine M2.S1, S2 are connected in parallel, and any one switch closure direct current machine M1, M2 can work, and direct current machine M1, M2 quit work when S1, S2 all disconnect.
Above-mentioned hand-held cleaners over circuit also comprises: storage battery power supply unit, charge in batteries interface unit.Storage battery B1 provides working power for entire circuit; In the time of the accumulator electric-quantity deficiency, charger is a charge in batteries by charging inlet S3.
The concrete course of work of the utility model hand-held cleaners over circuit is: described voltage comparison unit monitoring constantly storage battery operating voltage and with the preset threshold voltage ratio; when the storage battery both end voltage is lower than threshold voltage; operational amplifier U1 triggers one-way SCR TR1 conducting; conducting by one-way SCR TR1 disconnects relay K 1; with direct current machine M1; M2 throws off from main current supply circuit; in case this circuit under-voltage protection; even cell voltage returns to the above direct current machine M1 of threshold voltage; M2 can not restore electricity certainly yet; must cut-off switch S1 then again closure just can restore electricity; the protection storage battery can not worked repeatedly in under-voltage condition; play the function of the under-voltage automatic outage of storage battery, thereby prolonged the useful life of storage battery greatly.
Claims (8)
1. hand-held cleaners over circuit; it is characterized in that; comprise: storage battery under voltage comparing unit, actuating of relay control unit and circuit protection unit; described storage battery under voltage comparing unit with the operating voltage of batteries and with the preset threshold voltage ratio; judge whether to occur under-voltage; in case it is under-voltage; to signal to actuating of relay control unit, the control circuit protected location quit work motor after actuating of relay control unit was received the signal that storage battery under voltage comparing unit sends.
2. hand-held cleaners over circuit according to claim 1 is characterized in that, described hand-held cleaners over circuit also comprises charge in batteries interface unit and battery power supply unit.
3. hand-held cleaners over circuit according to claim 1 is characterized in that, described hand-held cleaners over circuit also comprises the work indicating member, and described work indicating member can be indicated the operating state of entire circuit.
4. hand-held cleaners over circuit according to claim 1; it is characterized in that; described storage battery under voltage comparing unit comprises operational amplifier U1; resistance R 1; R2; R3; R7; capacitor C 1; C2; diode D1; the power end of described operational amplifier U1 is via R7; control switch S1 is connected storage battery B1 two ends; the earth terminal of operational amplifier U1 is connected to the negative pole of storage battery B1; be connected on the power supply and the earth terminal of operational amplifier after resistance R 3 and the D1 series connection; the IN+ input of operational amplifier is connected the position that R3 links to each other with D1; resistance R 1 and capacitor C 1 in parallel and then and resistance R 2 series connections at power supply and the earth terminal of operational amplifier U1, the IN-input of operational amplifier is connected on the connecting place of resistance R 1 and resistance R 2.
5. hand-held cleaners over circuit according to claim 1, it is characterized in that, described actuating of relay control unit comprises resistance R 4, R5, R6, R8, capacitor C 3, one-way SCR TR1 and NPN triode Q1, Q2, one end of described resistance R 4 links to each other with the power supply of operational amplifier U1, the output of the other end and operational amplifier U1, a wherein end of resistance R 5 links to each other, the other end of resistance R 5 is connected to the negative pole of storage battery B1 via resistance R 6, one end of resistance R 4 is connected to the anode of storage battery B1 via resistance R 7, and the in succession base stage of NPN triode Q1 of the other end is connected to the negative pole of storage battery B1 then by one-way SCR TR1; The trigger electrode of one-way SCR TR1 is connected to the node that resistance R 5 links to each other with R6, capacitor C 3 is connected between the negative pole of the trigger electrode of one-way SCR TR1 and storage battery B1, the in succession collector electrode of NPN triode Q2 of the collector electrode of NPN triode Q1 is connected to the wherein end of the control coil of relay K 1 then, the emitter of NPN triode Q1 is connected to the base stage of NPN triode Q2, and the emitter of NPN triode Q2 is connected to the negative pole of storage battery B1.
6. hand-held cleaners over circuit according to claim 1 is characterized in that described circuit protection unit comprises diode D2, D3, D4, fuse F1; The in succession end of coil of relay K 1 of the negative pole of described diode D2 is connected to the anode of storage battery B1 via control switch S1, the positive pole of diode is connected to the other end of the coil of relay K 1, the anode that the negative pole of diode D3 is connected to direct current machine M1 is connected to the anode of storage battery via control switch S1, the negative terminal that the positive pole of diode D3 is connected to direct current machine M1 is connected to the negative pole of storage battery B1 via the contact of relay K 1, the negative pole of diode D4 is connected to the anode of direct current machine M2 via fuse F1, control switch S2, S3 is connected to the anode of storage battery B1, the negative terminal that the positive pole of diode D4 is connected to direct current machine M2 is connected to the negative pole of storage battery B1 via the contact of relay K 1, and fuse F1 is connected in the middle of storage battery B1 and the major loop that direct current machine M2 links to each other.
7. hand-held cleaners over circuit according to claim 3 is characterized in that described circuit working indicating member comprises resistance R 9, R10, indicator light LED1, LED2; The described R9 indicator light LED1 that connecting is connected in parallel on direct current machine M1 two ends then, and the R10 indicator light LED that connecting is connected in parallel on direct current machine M2 two ends then.
8. according to the described hand-held cleaners over of above each claim circuit; it is characterized in that; described hand-held cleaners over circuit also comprises switch control unit; described switch control unit comprises switch S 1, S2; described switch S 1 is connected in the middle of the loop of storage battery and direct current machine M1, and S2 is connected in the middle of the loop of storage battery and direct current machine M2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206319200U CN201868860U (en) | 2010-11-30 | 2010-11-30 | Overdischarge protective circuit of handheld dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206319200U CN201868860U (en) | 2010-11-30 | 2010-11-30 | Overdischarge protective circuit of handheld dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201868860U true CN201868860U (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206319200U Expired - Lifetime CN201868860U (en) | 2010-11-30 | 2010-11-30 | Overdischarge protective circuit of handheld dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201868860U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608371A (en) * | 2012-04-13 | 2012-07-25 | 中达电通股份有限公司 | Storage battery detecting device and undervoltage protection method thereof |
| CN104065043A (en) * | 2013-03-21 | 2014-09-24 | 海洋王（东莞）照明科技有限公司 | Battery under-voltage protection and display circuit |
| CN104600674A (en) * | 2015-01-09 | 2015-05-06 | 广东瑞德智能科技股份有限公司 | Simple and reliable battery overcharging protection circuit |
| CN109347381A (en) * | 2018-11-19 | 2019-02-15 | 陕西航空电气有限责任公司 | A kind of multimode failure reset processing unit for aviation low pressure dc generator controller |
| CN109546707A (en) * | 2018-12-08 | 2019-03-29 | 郑州工业应用技术学院 | A kind of storage battery protection device |
| CZ307763B6 (en) * | 2017-10-17 | 2019-04-17 | KIWA s.k., s.r.o. | Overvoltage protection for public LED lighting fixtures |
-
2010
- 2010-11-30 CN CN2010206319200U patent/CN201868860U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608371A (en) * | 2012-04-13 | 2012-07-25 | 中达电通股份有限公司 | Storage battery detecting device and undervoltage protection method thereof |
| CN102608371B (en) * | 2012-04-13 | 2014-08-13 | 中达电通股份有限公司 | Storage battery detecting device and undervoltage protection method thereof |
| CN104065043A (en) * | 2013-03-21 | 2014-09-24 | 海洋王（东莞）照明科技有限公司 | Battery under-voltage protection and display circuit |
| CN104065043B (en) * | 2013-03-21 | 2017-02-22 | 海洋王（东莞）照明科技有限公司 | Battery under-voltage protection and display circuit |
| CN104600674A (en) * | 2015-01-09 | 2015-05-06 | 广东瑞德智能科技股份有限公司 | Simple and reliable battery overcharging protection circuit |
| CZ307763B6 (en) * | 2017-10-17 | 2019-04-17 | KIWA s.k., s.r.o. | Overvoltage protection for public LED lighting fixtures |
| CN109347381A (en) * | 2018-11-19 | 2019-02-15 | 陕西航空电气有限责任公司 | A kind of multimode failure reset processing unit for aviation low pressure dc generator controller |
| CN109347381B (en) * | 2018-11-19 | 2021-12-28 | 陕西航空电气有限责任公司 | Multi-state fault reset processing device for aviation low-voltage direct-current generator controller |
| CN109546707A (en) * | 2018-12-08 | 2019-03-29 | 郑州工业应用技术学院 | A kind of storage battery protection device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |