CN106586346B - A kind of garbage compression box rubbish is without shedding hopper - Google Patents
A kind of garbage compression box rubbish is without shedding hopper Download PDFInfo
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- CN106586346B CN106586346B CN201710018740.1A CN201710018740A CN106586346B CN 106586346 B CN106586346 B CN 106586346B CN 201710018740 A CN201710018740 A CN 201710018740A CN 106586346 B CN106586346 B CN 106586346B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F9/00—Transferring of refuse between vehicles or containers with intermediate storage or pressing
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- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention relates to a kind of garbage compression box rubbish without shedding hopper, the hopper of the present invention is manufactured with 3mm steel plates, it is light-weight, flanging channel steel, which is welded, by the back side increases rigidity, flanging channel steel a line fewer than rectangular tube, weight is also just lighter than rectangular tube, entire Hopper Weight gently saves steel plate, the power of Turnover bunker is also small, save the energy, when hopper, which overturns 180 ° of bottoms, dumps rubbish towards day, entire hopper is embedded in compression three face baffle of babinet, without open face outwardly, rubbish is taken advantage of a situation and is slided along inclination stock guide and both sides sloping baffle, do not generate dust, rubbish is not had to fly upward, make the clean non-secondary pollution of working environment, and equipped with trigger control circuit intelligently to adjust the angle of inclination for tilting stock guide, the angle adjusted can be shown in real time.
Description
Technical field
The present invention relates to the technical field of rubbish movement compression box manufacture, it is related to a kind of garbage compression box rubbish without shedding material
Bucket.
Background technology
With going deep into for reform and opening-up, national economy is growing, and requirement of the people to living environment is also continuously improved, and wishes
It hopes and lives in hygienic, clean and tidy fine environment.Therefore, to the influence of surrounding enviroment when rubbish topples over, transports, it is proposed that higher
Requirement.Garbage transporting developed to from open type it is closed, in order to improve transfer efficiency, often garbage-compressing in steel-structure box
Transport in sub, rubbish pour into hopper, and hopper overturns 180 ° and pours into garbage compression box, rubbish from hopper pour into compression box when
It carves, rubbish comes down in torrents out of hopper, and no guiding enters in cabin, and the lighter rubbish in part, which is fallen from above, can fly poplar and generation
Dust makes working environment dirty, causes secondary pollution.Therefore, there is an urgent need for a kind of garbage compression box rubbish for breaking through the above obstacle without throwing
Spreading bucket.
Invention content
In view of this, the present invention provides a kind of solution or the garbage compression box rubbish that solves the above problems of part without shedding material
Bucket.
To achieve the effect that above-mentioned technical proposal, the technical scheme is that：A kind of garbage compression box rubbish is without shedding
Hopper, garbage compression box rubbish are manufactured without hopper is shed using 3mm steel plates, and there is inclination stock guide at the back side, rubbish is enable to take advantage of a situation
It slides and is flown upward without generating dust and rubbish；
In garbage compression box rubbish without embedded trigger control circuit in shedding hopper to control the inclination angle for tilting stock guide
Degree, to realize the adjustment at any time to it；Trigger control circuit can be divided mainly into control module, automatically controlled drive part and power supply unit
Point；
Power unit is made of power circuit, bridge circuit, power circuit multiple-connected battery and power-switching circuit, power supply
Conversion circuit is used to access external power supply, realizes the conversion of its voltage, is capable of providing the voltage of 5V, 8V, 12V three types,
Accumulator is used for when power-switching circuit failure, provides spare power supply, the effect of bridge circuit is to prevent circuit wrong
When damage to trigger control circuit；
By the voltage output of power unit output to automatically controlled drive part, as its startup power supply, automatically controlled drive part
It is made of timer and surrounding auxiliary circuit, the beginning trigger signal for providing control circuit, that is, provides and continue 2.5 seconds,
The driving voltage that electric current is 2-3 amperes；
A timer is used in automatically controlled drive part, surrounding auxiliary circuit is timing trigger circuit, by timer
The pulse of fixed frequency, timer can be exported always by constituting charge circuit and discharge loop, timer with timing trigger circuit
Pin be divided into grounding pin, reset pin, output pin, clock pins, voltage pin, discharge end pin, 2 voltages and compare
End；
Timer includes two voltage comparators, three resistance, a trigger and a power take off, two poles
It manages, negate device, three resistance are connected first, and voltage comparator is connected two-by-two between three resistance, as series circuit,
One end of flip-flops in series and power take off in order afterwards, series circuit is voltage pin, the reset of the other end and trigger
End is connected, and reset terminal is connected with reset pin, and two positive and negative input pins of first voltage comparator are connected with series circuit
And compare end respectively as two voltages, the positive input pin of second voltage comparator as clock pins, draw by negative input
Foot is connected with series circuit, and the output of power take off connects a diode and negate device simultaneously, two outputs of diode
Respectively as discharge end pin and grounding pin, the output of device is negated as output pin；
Timing trigger circuit includes digital analog converter, signal analyzer, miniature processing chip, amplifier tube, clocked flip electricity
Road is connected with output pin in timer, and there are three trigger buttons for dress, corresponding respectively to tilt down 5 DEG C, tilt 5 upwards
DEG C, three kinds of adjustment modes of stop motion, inside points not with 1,0, -1 digital representation, if trigger button is pressed, by phase
The number answered is converted via digital analog converter, is converted into analog signal, analog signal is divided via signal analyzer
Analysis, and calculate and store via miniature processing chip, miniature processing chip sends out order to power unit, by power unit output
12V control sources compare end to a voltage；If the order that trigger button is sent out is to tilt down 5 DEG C, and power unit is defeated
The 5V voltage outputs gone out compare end to another voltage, if the order that trigger button is sent out is to tilt 5 DEG C in phase, by power supply unit
Divide the 8V voltage outputs of output to compare end to another voltage, if the order that trigger button is sent out is stop motion, exports 0V
Compare end to another voltage；Automatically controlled drive part is started, is charge circuit when output pin exports low level, is drawn by output
Foot finally reaches grounding pin by the input of output to the diode of power take off, is put when output pin exports high level
Electrical circuit reaches grounding pin by the output of power take off using the diode that is output to of trigger, fixed after charge and discharge
When device output pulse make in timing trigger circuit generate backward voltage make diode saturation conduction therein, to make clocked flip
Circuit obtains trigger voltage, and trigger voltage is amplified via amplifier tube wherein included, and the trigger voltage of the amplification can drive
Dynamic control module completes its startup, the input of the pulse of timer output as control module, the pulse that timer exports
Size and the voltage of power unit output are in proportionate relationship, and can judge the order that trigger button is sent out whereby,；
Control module is made of Schmidt trigger circuit, deflection angle system and angle of inclination operating system, will be applied close
Special trigger circuit and deflection angle Cascade System, the input of Schmidt trigger circuit are the trigger voltage of amplification, deflection angle system
The input of system is the pulse of timer output, only both receives input, control module can be just activated, deflection angle system
System includes gradient sensor and synchro, by it mounted in the inside of inclination stock guide to measure angle at that time, in advance
Set security standpoint range, if angle at that time has been more than security standpoint range, no longer to tilt stock guide angle into
Row adjustment, is otherwise operated on it according to the trigger voltage of amplification using angle of inclination operating system, angle of inclination operation system
System is a minicomputer system and a lever angular adjustment apparatus, trigger voltage of the minicomputer system to amplification
High density operation is carried out, show that the adjustment mode that needs adjust, lever angular adjustment apparatus are tilting stock guide in rear placement branch
Support arrangement synchronizes adjustment angle according to leverage；After adjustment angle, it is connected with gradient sensor by synchro,
Can be according to electromagnetic induction principle, synchro will be rotated by the magnetic field electromagnetic torque effect synthesized, inside it
Needle dial it is consistent with the angle that gradient sensor measures until.
The present invention useful achievement be：The present invention proposes a kind of garbage compression box rubbish without shedding hopper, usual hopper
It is manufactured with 5mm steel plates, weight is big, and inertia is also big, while while overturning is also big to the active force of rubbish, it is easier to rubbish is shed, this
Neoteric hopper is manufactured with 3mm steel plates, light-weight, and welding flanging channel steel by the back side increases rigidity, and flanging channel steel compares rectangle
The few a line of pipe, weight is also just lighter than rectangular tube, and entire Hopper Weight gently saves steel plate, and the power of Turnover bunker is also small, saves energy
Source, when hopper, which overturns 180 ° of bottoms, dumps rubbish towards day, entire hopper is embedded in compression three face baffle of babinet, and nothing opens outwardly
The face opened, rubbish are taken advantage of a situation and are slided along inclination stock guide and both sides sloping baffle, do not generate dust, do not have rubbish and fly upward, make work
Make the clean non-secondary pollution of environment, and equipped with trigger control circuit intelligently to adjust the angle of inclination for tilting stock guide, energy
The angle adjusted is shown in real time.
Description of the drawings
Fig. 1 is garbage compression box rubbish without side view when shedding hopper load garbage；
Fig. 2 is garbage compression box rubbish without shedding hopper front view；
Fig. 3 is garbage compression box rubbish without the lateral plan shed when 180 ° of hopper overturning is tiped rubbish；
In figure, serial number 1 is stock guide, and serial number 2 is two sides baffle, and serial number 3 is flanging channel steel.
Specific implementation mode
In order to make technical problems, technical solutions and advantages to be solved be more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in detail.It should be noted that specific embodiment described herein is only used
It to explain the present invention, is not intended to limit the present invention, can realize that the product of said function belongs to equivalent replacement and improvement, include
Within protection scope of the present invention.The specific method is as follows：
Embodiment 1：The present invention provides the new design that rubbish moves compression box hopper, hopper sweeps away rubbish with large-sized
Dustpan is similar, and the usual back side and bottom surface are squares, inner after the large scale dustpan (hopper) of mechanized operation overturns 180 °
The rubbish in face pours down at once to be thrown into cabin, and dust is generated, some lighter rubbish such as scraps of paper etc. can be shed to outside, be made
Cleaning environment is made dirty, and the work of staff is influenced, and promotes surrounding people also have to be with mask.The hopper back side of the present invention
There is inclined stock guide, when hopper overturns 180 °, bottom surface is towards day, and the rubbish of bottom is in highest order, then along inclined guide
Plate is taken advantage of a situation in slide-in material cabin, and rubbish eliminates without the process shed in the air and generates dust during overturning is tiped rubbish, compared with
Light rubbish is also limited to not dishing out in hopper inclination stock guide and two side shields and flies upward and take advantage of a situation and slide into cabin.
The hopper of the present invention is manufactured with 3mm steel plates, and at the 3mm steel plates back side, welding flanging channel steel reinforces steel plate rigidity, hopper
The back side has an inclined stock guide, both sides to be made of the babinet of an opening together with stock guide, bottom plate baffle, and each part steel plate is used
Electric welding is integral, connects compression babinet and connecting rod with axis pin, hopper is overturn 180 °, reaches and tip rubbish by oil cylinder pushing connecting rod
Effect.
Trigger control circuit is added in hopper without shedding in the garbage compression box rubbish of the present invention, is led with controlling the inclination
The angle of inclination of flitch, to realize the adjustment at any time to it；Trigger control circuit can be divided mainly into control module, automatically controlled driving portion
Point and power unit；
Power unit is made of power circuit, bridge circuit, power circuit multiple-connected battery and power-switching circuit, power supply
Conversion circuit realizes the conversion of voltage, is capable of providing a plurality of types of voltages of 5V, 8V, 12V, electric power storage for accessing external power supply
When pond is of use not only in power-switching circuit failure, power supply is provided, the effect of bridge circuit is when preventing circuit wrong to remote
The damage of journey trigger control circuit；
By the voltage output of power unit output to automatically controlled drive part, as its startup power supply, automatically controlled drive part
It is made of timer and surrounding auxiliary circuit, the beginning trigger signal for providing trigger control circuit provides lasting 2.5
Second, the driving voltage that electric current is 2-3 amperes；
Installation for trigger control circuit is first switched the control of power circuit and base station with monitoring communication cable
1st tunnel exports switching value and is connected, i.e., control signal cable is connected with the pin21 of connecting terminal box and pin23, works as webmaster in this way
When control software sends control command, control section can receive the instruction.
Secondly power input terminal is connected with the leading-out terminal of base station switch power supply, it is electric because devising bridge
Source positive and negative anodes can be connected arbitrarily.Finally with power cord by the control input terminal of the leading-out terminal of driving circuit and electronic lock
It is connected, drive signal is+12V, and the duration is 0.5 second, electric current 1.5-3A.When between control module and automatically controlled drive part
Distance difference when different power cords should be selected to be attached.
Embodiment 2：The present invention has used a timer, timer to can be used for substitution machine in automatically controlled drive part
The medium scale integration (MSI) of tool formula timer is gained the name because input terminal design is there are three the resistance of 5k Ω.Timer is a kind of mould
Fit the medium-scale integration device that digital function is combined.The working power voltage range of timer is wide, can be in 4.5V-16V models
Interior normal work is enclosed, output driving current is about 200mA, thus its output can directly drive 12V relays.Timer it is interior
Portion's circuit block diagram and outer pin are lined up,
Timer includes three voltage comparators, four resistance, a trigger and a power take off, two poles
It manages, negate device, first four resistance series connection, and voltage comparator is connected two-by-two between four resistance, as series circuit, after
One end of flip-flops in series and power take off in order, series resistance is voltage pin, the reset terminal of the other end and trigger
Be connected, reset terminal is connected with reset pin, two positive and negative input pins of a voltage comparator be connected with series circuit and
Compare end respectively as two voltages, the positive input pin of another voltage comparator as clock pins, negative input pin with
Series circuit is connected, and the output of power take off connects a diode and negate device simultaneously, two output difference of diode
As discharge end pin and grounding pin, the output of device is negated as output pin；
The function of timer is mainly determined by three comparators.The output voltage control trigger of comparator and discharge tube
State.Voltage is added between power supply and ground, when 5 feet of comparator are hanging, then 5 foot of noninverting input of voltage comparator
Voltage is 2VCC/3.
The operation principle of comparator is, when in-phase end voltage is more than reversed terminal voltage, output supply voltage VCC signal,
Otherwise out-put supply earth signal.
The operation principle of trigger is：
As R=1, S=0, then Q=1, trigger set 1.
As R=0, S=1, then Q=0, trigger reset.
As R=S=1, flip-flop states remain unchanged.
As R=S=0, flip-flop states are uncertain.
If two comparators C1 and C2 are respectively connected on the divider of three resistance composition there are one input terminal, comparator
Output be connected on trigger.In addition there are output stages and discharge tube.The driving current of output stage, can be direct up to 200mA
Drive 12V and electric appliance.
The reference voltage of comparator C1 and comparator C2 are respectively UA and UB, are touched according to another of C1 and C2 input terminal-
Hair input and threshold value input, can determine whether out the output state of trigger.When reset terminal is low level, trigger is forced multiple
Position.If without resetting operation, reset terminal should connect high level.Due to three resistance equivalences, so when not having to control control source：
UA=VCC/3, UB=2VCC/3；When control voltage is external, then：UA=VCC/2, UB=VCC.To prevent from interfering, work as control
When voltage end is hanging, a filter capacitor should be connect to ground terminal.
Timer has the characteristics that：
It is VCC/3 and 2VCC/3 respectively 1. there are two threshold values for 555 timers.
2. the state consistency of 7 foot of 3 foot of output end and discharge end, output low level corresponds to discharge tube saturation, is circumscribed in 7 feet
When pull-up resistor, 7 feet are low level.Output high level corresponds to discharge tube cut-off, and when there is pull-up resistor, 7 feet are high level.
3. the change of state output terminal has hysteretic phenomenon, hysteresis voltage VCC/3.
4. output and triggering input inversion.
The foregoing is merely the preferred embodiments of the invention, are not limited to the claims of the present invention.
Simultaneously it is described above, for those skilled in the technology concerned it would be appreciated that and implement, therefore other be based on institute of the present invention
The equivalent change that disclosure is completed, should be included in the covering scope of the claims.
The present invention useful achievement be：The present invention proposes a kind of garbage compression box rubbish without shedding hopper, usual hopper
It is manufactured with 5mm steel plates, weight is big, and inertia is also big, while while overturning is also big to the active force of rubbish, it is easier to rubbish is shed, this
Neoteric hopper is manufactured with 3mm steel plates, light-weight, and welding flanging channel steel by the back side increases rigidity, and flanging channel steel compares rectangle
The few a line of pipe, weight is also just lighter than rectangular tube, and entire Hopper Weight gently saves steel plate, and the power of Turnover bunker is also small, saves energy
Source, when hopper, which overturns 180 ° of bottoms, dumps rubbish towards day, entire hopper is embedded in compression three face baffle of babinet, and nothing opens outwardly
The face opened, rubbish are taken advantage of a situation and are slided along inclination stock guide and both sides sloping baffle, do not generate dust, do not have rubbish and fly upward, make work
Make the clean non-secondary pollution of environment, and equipped with trigger control circuit intelligently to adjust the angle of inclination for tilting stock guide, energy
The angle adjusted is shown in real time.
Claims (1)
1. a kind of garbage compression box rubbish is without shedding hopper, which is characterized in that the garbage compression box rubbish is adopted without hopper is shed
It is manufactured with 3mm steel plates, there is inclination stock guide at the back side, and rubbish is enable to take advantage of a situation to slide and flown upward without generating dust and rubbish；
In the garbage compression box rubbish without embedded trigger control circuit in shedding hopper to control inclining for the inclination stock guide
Rake angle, to realize the adjustment at any time to it；The trigger control circuit can be divided mainly into control module, automatically controlled drive part and
Power unit；
The power unit is made of power circuit, bridge circuit, the power circuit multiple-connected battery and power-switching circuit,
The power-switching circuit realizes the conversion to its voltage, is capable of providing tri- type of 5V, 8V, 12V for accessing external power supply
The voltage of type, the accumulator are used for when the power-switching circuit failure, provide spare power supply, the bridge circuit
Effect be damage when preventing circuit wrong to the trigger control circuit；
The voltage output that the power unit is exported is to the automatically controlled drive part, described automatically controlled as its startup power supply
Drive part is made of timer and surrounding auxiliary circuit, the beginning trigger signal for providing the control module carries
For 2.5 seconds duration, the driving voltage that electric current is 2-3 amperes；
It is timing trigger circuit that a timer, the surrounding auxiliary circuit have been used in the automatically controlled drive part,
Charge circuit and discharge loop are constituted by the timer and the timing trigger circuit, the timer can export always solid
Determine the pulse of frequency, the pin of the timer is divided into grounding pin, reset pin, output pin, clock pins, voltage and draws
Foot, discharge end pin, 2 voltages compare end；
The timer includes two voltage comparators, three resistance, a trigger and a power take off, two poles
It manages, negate device, three resistance are connected first, and voltage comparator is connected two-by-two between three resistance, as
Series circuit, after connect in order the trigger and the power take off, one end of the series circuit is the voltage
Pin, the other end are connected with the reset terminal of the trigger, and the reset terminal is connected with the reset pin, first electricity
Press two positive and negative input pins and the series circuit of comparator be connected and respectively as two voltages compared with end, the
The positive input pin of two voltage comparators is connected as the clock pins, negative input pin with the series circuit,
The output of the power take off connects a diode and described negates device, two outputs point of the diode simultaneously
Not Zuo Wei the discharge end pin and the grounding pin, the output for negating device is as the output pin；
The timing trigger circuit includes digital analog converter, signal analyzer, miniature processing chip, amplifier tube, and the timing is touched
Power Generation Road is connected with output pin in the timer, and fills there are three trigger button, respectively it is corresponding tilt down 5 DEG C, to
Upper inclination three kinds of 5 DEG C, stop motion adjustment modes, inside points not with 1,0, -1 digital representation, if the trigger button
It is pressed, corresponding number is converted via the digital analog converter, analog signal is converted into, the analog signal is passed through
It is analyzed by signal analyzer, and storage is calculated via the miniature processing chip, the miniature processing chip is to power supply unit
Distribute order, the 12V control sources that the power unit exports are compared into end to the voltage；If the triggering is pressed
The order that button is sent out is to tilt down 5 DEG C, and the 5V voltage outputs that the power unit exports are compared to voltage described in another
End, if the order that the trigger button is sent out is to tilt 5 DEG C in phase, the 8V voltage outputs that the power unit is exported are to separately
One voltage compares end, if the order that the trigger button is sent out is stop motion, output 0V to electricity described in another
Pressure ratio is relatively held；The automatically controlled drive part is started, is the charge circuit when the output pin exports low level, by described
Output pin finally reaches the grounding pin by the input of output to the diode of the power take off, when described
Output pin exports discharge loop when high level and passes through the output of the power take off using the defeated of the trigger
Go out to the diode and reach the grounding pin, after charge and discharge, the timer output pulse makes the timing trigger circuit
Middle generation backward voltage makes the diode saturation conduction therein, to make the timing trigger circuit obtain trigger voltage,
And amplify the trigger voltage via the amplifier tube wherein included, the trigger voltage of the amplification can drive described
Control module completes its startup, the input of the pulse of the timer output as the control module, and the timer is defeated
The size of the pulse gone out and the voltage of power unit output are in proportionate relationship, can judge the trigger button hair whereby
The order gone out,；
The control module is made of Schmidt trigger circuit, deflection angle system and angle of inclination operating system, will be described
The input of Schmidt trigger circuit and the deflection angle Cascade System, the Schmidt trigger circuit is the triggering electricity of amplification
Pressure, the input of the deflection angle system are the pulse of timer output, only both receive input, the control
Module can be just activated, and the deflection angle system includes gradient sensor and synchro, it is mounted in the inclination
Security standpoint range has been set in advance to measure angle at that time in the inside of stock guide, if the angle at that time has been more than
The security standpoint range is no longer adjusted the angle for tilting stock guide, is otherwise made according to the trigger voltage of the amplification
Operated on it with the angle of inclination operating system, the angle of inclination operating system be minicomputer system with
And a lever angular adjustment apparatus, the minicomputer system carry out high density operation to the trigger voltage of the amplification,
Show that the adjustment mode that needs adjust, the lever angular adjustment apparatus are supported in rear placement in the inclination stock guide and filled
It sets and adjustment angle is synchronized according to leverage；After adjustment angle, by the synchro and the gradient sensor
It is connected, can will be rotated by the magnetic field electromagnetic torque effect synthesized according to electromagnetic induction principle, the synchro, directly
Until the angle that its internal needle dial is measured with the gradient sensor is consistent.
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| CN201710018740.1A CN106586346B (en) | 2017-01-10 | 2017-01-10 | A kind of garbage compression box rubbish is without shedding hopper |
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| CN201710018740.1A CN106586346B (en) | 2017-01-10 | 2017-01-10 | A kind of garbage compression box rubbish is without shedding hopper |
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| CN106586346B true CN106586346B (en) | 2018-11-02 |
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| CN108995066A (en) * | 2018-07-04 | 2018-12-14 | 东莞市联洲知识产权运营管理有限公司 | A kind of feed cap structure on kneader |
| CN110801773A (en) * | 2019-11-14 | 2020-02-18 | 谢铁如 | Centralized feeding system for polyethylene processing |
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| CN201594221U (en) * | 2009-10-22 | 2010-09-29 | 深圳市神舟电脑股份有限公司 | Power control device |
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| CN204810248U (en) * | 2015-07-13 | 2015-11-25 | 深圳市金溢科技股份有限公司 | Power delay switch circuit and have terminal of this circuit |
| CN206100583U (en) * | 2016-10-28 | 2017-04-12 | 张子慕 | Energy -conserving electric light control system |
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|---|---|---|---|---|
| US3802335A (en) * | 1972-03-02 | 1974-04-09 | Int Dynetics Corp | System for controlling the hydraulic ram of a refuse compactor |
| CN201594221U (en) * | 2009-10-22 | 2010-09-29 | 深圳市神舟电脑股份有限公司 | Power control device |
| CN101764517A (en) * | 2010-02-11 | 2010-06-30 | 浪潮(北京)电子信息产业有限公司 | Positive-negative dual power supply system based on single input |
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| CN206100583U (en) * | 2016-10-28 | 2017-04-12 | 张子慕 | Energy -conserving electric light control system |
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| CN106586346A (en) | 2017-04-26 |
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Effective date of registration: 20190403 Address after: Room 203A, Building No. 1888, Xinjinqiao Road, Pudong New Area, Shanghai 20106 Patentee after: Shanghai head of environmental Polytron Technologies Inc Address before: No. 210 Freshwater Road, Huangpu District, Shanghai 200020 Patentee before: Ren Yifan |