CN107749717A - A kind of refrigerator power socket voltage detection type protection circuit - Google Patents
A kind of refrigerator power socket voltage detection type protection circuit Download PDFInfo
- Publication number
- CN107749717A CN107749717A CN201711021261.1A CN201711021261A CN107749717A CN 107749717 A CN107749717 A CN 107749717A CN 201711021261 A CN201711021261 A CN 201711021261A CN 107749717 A CN107749717 A CN 107749717A
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- Prior art keywords
- electric capacity
- triode
- pole
- resistance
- negative pole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage, current or power
Abstract
The invention discloses a kind of refrigerator power socket voltage detection type protection circuit, it is characterised in that：Mainly by front end constant-current source circuit, triode VT1, triode VT2, triode VT3, triode VT4, light emitting diode VD, bidirectional thyristor VS, fuse FU, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, diode D1, diode D2, diode D3, diode D4 and voltage-regulator diode D5 compositions.The present invention need not use the electronic component that transformer and integrated chip etc. are complicated and cost is higher so that of the invention is relatively simple for structure, can be easy to maintenance and inspection, and can reduce cost；Power-off suddenly can be also avoided simultaneously and starts compressor when sending a telegram here immediately and damages compressor, be adapted to promote the use.
Description
Technical field
The present invention relates to a kind of protection circuit, more particularly to a kind of refrigerator power socket voltage detection type protection circuit.
Background technology
At present, refrigerator has become the indispensable household electrical appliance of family life, and the compressor used in refrigerator is then
It is the soul part of refrigerator.When using refrigerator, if incoming call can be easier to damage compressor again at once after having a power failure, seriously
Even can burn compressor.Therefore, generally protected by way of the circuit of protection is set in the power outlet in refrigerator
Compressor is protected, prevents from being again switched on power supply in 5 minutes after suddenly having a power failure.
But the power socket protection circuit of the refrigerator used at present usually requires to use transformer, integrated chip etc.
Electronic component, not only make it that circuit structure is complicated, is not easy to maintenance and inspection；Also cause that its cost is also higher simultaneously.
The content of the invention
It is existing to simplify it is an object of the invention to provide a kind of refrigerator power socket voltage detection type protection circuit
There is the structure of refrigerator power socket voltage detection type protection circuit, in order to maintenance and inspection and reduce cost.
The present invention is achieved through the following technical solutions：
A kind of refrigerator power socket voltage detection type protection circuit, mainly by preposition constant-current source circuit, triode VT1,
Triode VT2, triode VT3, triode VT4, positive pole is connected with triode VT4 emitter stage, negative pole and triode VT3
The electric capacity C4 that emitter stage is connected, the resistance R6 being serially connected between electric capacity C4 positive pole and triode VT3 colelctor electrode, positive pole with
Electric capacity C5, the P pole that triode VT3 base stage is connected, negative pole is connected after resistance R5 with triode VT3 emitter stage and electricity
Appearance C5 negative pole is connected, diode D4, the P pole that N poles are connected with triode VT3 emitter stage is connected with electric capacity C5 negative pole
Connect, voltage-regulator diode D5, the N pole that N poles are connected with electric capacity C4 positive pole is connected with electric capacity C5 negative pole, P poles are through resistance R4
The light emitting diode VD being connected afterwards with electric capacity C4 positive pole, be serially connected in triode VT2 emitter stage and electric capacity C4 positive pole it
Between resistance R3, electric capacity C3, the P poles that positive pole is connected with triode VT2 emitter stage, negative pole is connected with electric capacity C5 negative pole
It is connected after resistance R2 with electric capacity C3 negative pole, diode D3, the P pole and three that N poles are connected with triode VT2 colelctor electrode
The diode D2 that pole pipe VT1 colelctor electrode is connected, N poles are connected with triode VT2 emitter stage, positive pole and triode VT1
Base stage be connected, electric capacity C2, the P pole that negative pole is connected with triode VT2 base stage is connected with electric capacity C3 negative pole, N poles
The diode D1 being connected with triode VT2 base stage, positive pole are connected with triode VT1 emitter stage after resistance R1, born
The electric capacity C1 that pole is connected with triode VT2 base stage, the first anode are sequentially negative with electric capacity C5 after electric capacity C6 and resistance R8
Pole is connected, second plate is connected with electric capacity C5 negative pole, colelctor electrode of the control pole with triode VT4 after resistance R7 is connected
The bidirectional thyristor VS connect, and one end be connected with the bidirectional thyristor VS first anode, the other end and front end constant-current source
The fuse FU compositions that circuit is connected；The emitter stage of the triode VT1 is connected with triode VT2 base stage, and described three
Pole pipe VT4 base stage is connected with triode VT3 colelctor electrode；First sun of the positive pole of the electric capacity C6 and bidirectional thyristor VS
Pole is connected, and negative pole of its negative pole with electric capacity C5 after resistance R8 is connected；The positive pole of the electric capacity C1 and electric capacity C5 negative pole
Collectively constitute the output end of whole protection circuit；
The front end constant-current source circuit is by operational amplifier P, triode VT5, positive pole after resistance R101 with operation amplifier
The electric capacity C102 that device P negative input is connected, negative pole is connected after resistance R105 with triode VT5 base stage, positive pole
Power input is collectively constituted with electric capacity C102 negative pole, the electric capacity C101 that negative pole is connected with electric capacity C102 positive pole, concatenate
Resistance R102 between operational amplifier P electrode input end and output end, operational amplifier P output end is serially connected in melting
Resistance R103 between disconnected device FU, the resistance being serially connected between operational amplifier P output end and triode VT5 emitter stage
R104, and the electric capacity C103 groups that positive pole is connected with triode VT5 emitter stage, negative pole is connected with electric capacity C1 positive pole
Into；The grounded collector of the triode VT5.
Further, the triode VT1~VT5 is 3CG15 type triodes.
Further, the operational amplifier P is LM358 single supply general-purpose operation amplifiers.
In order to which the present invention is better achieved, the diode D1~D4 is 1N4007 type diodes, the pole of voltage stabilizing two
Pipe D5 is 2CW110 type voltage-regulator diodes.
In order to ensure effect, the light emitting diode VD is BT205 type light emitting diodes, and the bidirectional thyristor VS is
2PM6 type bidirectional thyristors.
The present invention compared with prior art, has advantages below and beneficial effect：
(1) present invention need not use the electronic component that transformer and integrated chip etc. are complicated and cost is higher so that this
That invents is relatively simple for structure, can be easy to maintenance and inspection, and can reduce cost；Power-off suddenly can be also avoided simultaneously and is stood when sending a telegram here
Start compressor and damage compressor.
(2) triode VT1 of the invention and triode VT2, resistance R2, electric capacity C2, diode D2 and diode D3 groups
Into voltage detecting circuit can effectively reduce the leakage and loss of output current, and the unusual fluctuations of output current can be suppressed,
Output current is set to keep stable, so as to improve the stability of the output current of the present invention.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the overall structure diagram of the preposition constant-current source circuit of the present invention.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment
As shown in figure 1, the refrigerator power socket voltage detection type protection circuit of the present invention, mainly by preposition constant-current source electricity
Road, triode VT1, triode VT2, triode VT3, triode VT4, light emitting diode VD, bidirectional thyristor VS, fuse
FU, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1, electric capacity C2, electric capacity
C3, electric capacity C4, electric capacity C5, electric capacity C6, diode D1, diode D2, diode D3, diode D4 and voltage-regulator diode D5 groups
Into.Wherein, the resistance R1 is that 800K Ω, the resistance R2~R5 are that 20K Ω, resistance R6 and resistance R7 are 25K Ω, electricity
Resistance R8 is 50K Ω.Meanwhile the capacitance that the capacitance of the electric capacity C1 is 0.68 μ F, the electric capacity C2 and electric capacity C3 is 120 μ F,
The capacitance of the electric capacity C4~C6 is 200 μ F.In order to ensure the practical effect of the present invention, during implementation, the triode
VT1~VT4 is 3CG15 type triodes, and the blowout current of the fuse FU is set to 5A.Diode D1~the D4 is
1N4007 type diodes, the voltage-regulator diode D5 are 2CW110 type voltage-regulator diodes.The light emitting diode VD is BT205 types
Light emitting diode, the bidirectional thyristor VS are 2PM6 type bidirectional thyristors.
During connection, the positive pole of the electric capacity C4 is connected with triode VT4 emitter stage, and its negative pole is with triode VT3's
Emitter stage is connected.The resistance R6 is serially connected between electric capacity C4 positive pole and triode VT3 colelctor electrode.The electric capacity C5's
Positive pole is connected with triode VT3 base stage, and emitter stage of its negative pole with triode VT3 after resistance R5 is connected.Described two
Pole pipe D4 P poles are connected with electric capacity C5 negative pole, and its N pole is connected with triode VT3 emitter stage.The voltage-regulator diode
D5 P poles are connected with electric capacity C5 negative pole, and its N pole is connected with electric capacity C4 positive pole.The N poles of the light emitting diode VD with
Electric capacity C5 negative pole is connected, and its positive pole of P poles with electric capacity C4 after resistance R4 is connected.The resistance R3 is serially connected in triode
Between VT2 emitter stage and electric capacity C4 positive pole.The positive pole of the electric capacity C3 is connected with triode VT2 emitter stage, and it is negative
Pole is connected with electric capacity C5 negative pole.Negative pole of the P poles of the diode D3 with electric capacity C3 after resistance R2 is connected, its N pole
It is connected with triode VT2 colelctor electrode.The P poles of the diode D2 are connected with triode VT1 colelctor electrode, its N pole with
Triode VT2 emitter stage is connected.The positive pole of the electric capacity C2 is connected with triode VT1 base stage, its negative pole and three poles
Pipe VT2 base stage is connected.The P poles of the diode D1 are connected with electric capacity C3 negative pole, its N pole and triode VT2 base
Pole is connected.Emitter stage of the positive pole of the electric capacity C1 with triode VT1 after resistance R1 is connected, its negative pole and triode
VT2 base stage is connected.The first anode of the bidirectional thyristor VS is sequentially negative with electric capacity C5 after electric capacity C6 and resistance R8
Pole is connected, and its second plate is connected with electric capacity C5 negative pole, colelctor electrode of its control pole after resistance R7 with triode VT4
It is connected.One end of the fuse FU is connected with the bidirectional thyristor VS first anode, its other end and preposition constant-current source
Circuit.
Wherein, the emitter stage of the triode VT1 is connected with triode VT2 base stage, the base stage of the triode VT4
It is connected with triode VT3 colelctor electrode.The positive pole of the electric capacity C6 is connected with the bidirectional thyristor VS first anode, and it is negative
Negative pole of the pole with electric capacity C5 after resistance R8 is connected.The positive pole of the electric capacity C1 collectively constitutes whole guarantor with electric capacity C5 negative pole
The output end of protection circuit is simultaneously connected with the compressor of refrigerator, specifically, the positive pole of the electric capacity C1 connects the power supply of compressor
Pole is inputted, the negative pole of the electric capacity C4 connects the startup pole of compressor.
As shown in Fig. 2 the preposition constant-current source circuit is by operational amplifier P, triode VT5, electric capacity C101, electric capacity
C102, electric capacity C103, resistance R101, resistance R102, resistance R103, resistance R104 and resistance R105 are formed.Wherein, the electricity
It is 150K Ω to hinder R101 and resistance R103 and resistance R105, and the resistance R102 is 100K Ω, and resistance R104 is 80K Ω.
Meanwhile the capacitance that the capacitance of the electric capacity C101 is 47 μ F, the electric capacity C102 is 200 μ F, the capacitance of the electric capacity C103 is
12μF.In order to ensure the practical effect of the present invention, during implementation, the triode VT5 is also using 3CG15 types triode come reality
Existing, the operational amplifier P is then realized using LM358 single supply general-purpose operation amplifiers.
During connection, the negative input of the positive pole of the electric capacity C102 with operational amplifier P after resistance R101 is connected,
Base stage of its negative pole with triode VT5 after resistance R105 is connected.The positive pole of the electric capacity C101 and electric capacity C102 negative pole
Collectively constitute power input and external 220V mains supplies, its negative pole are connected with electric capacity C102 positive pole.The resistance
R102 is serially connected between operational amplifier P electrode input end and output end, and the resistance R103 is serially connected in operational amplifier P's
Between output end and fuse FU, the resistance R104 is serially connected in operational amplifier P output end and triode VT5 emitter stage
Between.The positive pole of the electric capacity C103 is connected with triode VT5 emitter stage, and its negative pole is connected with electric capacity C1 positive pole；
And the grounded collector of the triode VT5.
Transformer and integrated chip etc. need not be used complicated by the present invention and the higher electronic component of cost, knot of the invention
Structure is fairly simple, can be easy to maintenance and inspection, and can reduce cost.In use, the preposition constant-current source circuit can be to input
220V civil powers are handled, so that it is guaranteed that the present invention possesses constant operating current, avoid it from producing electricity during work
Magnetic disturbance signal, greatly improve the stability of the present invention.Meanwhile resistance R1 and electric capacity C1 composition capacity voltage dropping circuits, warp
Civil power after preposition constant-current source circuit processing is passed through by triode VT1 and triode VT2, resistance after capacity voltage dropping circuit is depressured again
The voltage detecting circuit that R2, electric capacity C2, diode D2 and diode D3 are formed is handled, and effectively reduces output current
Leakage and loss, and the unusual fluctuations of output current can be suppressed, output current is kept stable, so as to improve the defeated of the present invention
Go out the stability of electric current.Then triode is supplied after resistance R3 decompressions and by voltage-regulator diode D5 voltage stabilizings after electric capacity C3 filtering
The delay protection circuit that VT3, triode VT4, electric capacity C4, electric capacity C5, resistance R5 and resistance R6 are formed.It is just switched in power supply
When, because the voltage at electric capacity C4 both ends can not be mutated, triode VT3 and triode VT4 ends, then bidirectional thyristor VS is without triggering
Voltage and turn off, freezer compressor power supply is obstructed.Make triode to electric capacity C4 chargings by 5min delay time when power supply
VT3 turns on triode VT4, you can and the VT conductings of triggering bidirectional thyristor, compressor is obtained power supply and start work, so as to
Avoid power-off suddenly and start compressor immediately when sending a telegram here and damage compressor.
As described above, it can preferably realize the present invention.
Claims (5)
- A kind of 1. refrigerator power socket voltage detection type protection circuit, it is characterised in that：Mainly by preposition constant-current source circuit, three Pole pipe VT1, triode VT2, triode VT3, triode VT4, positive pole is connected with triode VT4 emitter stage, negative pole and three The electric capacity C4 that pole pipe VT3 emitter stage is connected, the resistance being serially connected between electric capacity C4 positive pole and triode VT3 colelctor electrode R6, the electric capacity that positive pole is connected with triode VT3 base stage, negative pole is connected after resistance R5 with triode VT3 emitter stage Diode D4, the P pole that C5, P pole are connected with electric capacity C5 negative pole, N poles are connected with triode VT3 emitter stage and electric capacity C5 Negative pole be connected, voltage-regulator diode D5, the N pole that N poles are connected with electric capacity C4 positive pole is connected with electric capacity C5 negative pole, P The light emitting diode VD that pole is connected after resistance R4 with electric capacity C4 positive pole, it is serially connected in triode VT2 emitter stage and electric capacity Resistance R3 between C4 positive pole, positive pole is connected with triode VT2 emitter stage, negative pole is connected with electric capacity C5 negative pole Electric capacity C3, P pole is connected after resistance R2 with electric capacity C3 negative pole, the diode that N poles are connected with triode VT2 colelctor electrode The diode D2 that D3, P pole are connected with triode VT1 colelctor electrode, N poles are connected with triode VT2 emitter stage, positive pole with Electric capacity C2, the P pole and electric capacity C3 negative pole phase that triode VT1 base stage is connected, negative pole is connected with triode VT2 base stage The diode D1 that connection, N poles are connected with triode VT2 base stage, emitter stage phase of the positive pole after resistance R1 with triode VT1 Connection, the electric capacity C1 that is connected with triode VT2 base stage of negative pole, the first anode sequentially after electric capacity C6 and resistance R8 with electric capacity C5 negative pole is connected, second plate is connected with electric capacity C5 negative pole, current collection of the control pole after resistance R7 with triode VT4 The bidirectional thyristor VS that pole is connected, and one end be connected with the bidirectional thyristor VS first anode, the other end and front end The fuse FU compositions that constant-current source circuit is connected；The emitter stage of the triode VT1 is connected with triode VT2 base stage, The base stage of the triode VT4 is connected with triode VT3 colelctor electrode；The positive pole of the electric capacity C6 is with bidirectional thyristor VS's The first anode is connected, and negative pole of its negative pole with electric capacity C5 after resistance R8 is connected；The positive pole of the electric capacity C1 and electric capacity C5 Negative pole collectively constitute the output end of whole protection circuit；The front end constant-current source circuit is by operational amplifier P, and triode VT5, positive pole is after resistance R101 with operational amplifier P's The electric capacity C102 that negative input is connected, negative pole is connected after resistance R105 with triode VT5 base stage, positive pole and electric capacity The electric capacity C101 that C102 negative pole collectively constitutes power input, negative pole is connected with electric capacity C102 positive pole, is serially connected in computing Resistance R102 between amplifier P electrode input end and output end, it is serially connected in operational amplifier P output end and fuse FU Between resistance R103, the resistance R104 being serially connected between operational amplifier P output end and triode VT5 emitter stage, with And the electric capacity C103 compositions that positive pole is connected with triode VT5 emitter stage, negative pole is connected with electric capacity C1 positive pole；Described three Pole pipe VT5 grounded collector.
- A kind of 2. refrigerator power socket voltage detection type protection circuit according to claim 1, it is characterised in that：It is described Triode VT1~VT5 is 3CG15 type triodes.
- A kind of 3. refrigerator power socket voltage detection type protection circuit according to claim 1, it is characterised in that：It is described Operational amplifier P is LM358 single supply general-purpose operation amplifiers.
- A kind of 4. refrigerator power socket voltage detection type protection circuit according to claim 1, it is characterised in that：It is described Diode D1~D4 is 1N4007 type diodes, and the voltage-regulator diode D5 is 2CW110 type voltage-regulator diodes.
- A kind of 5. refrigerator power socket voltage detection type protection circuit according to claim 1, it is characterised in that：It is described Light emitting diode VD is BT205 type light emitting diodes, and the bidirectional thyristor VS is 2PM6 type bidirectional thyristors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021261.1A CN107749717A (en) | 2017-10-27 | 2017-10-27 | A kind of refrigerator power socket voltage detection type protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021261.1A CN107749717A (en) | 2017-10-27 | 2017-10-27 | A kind of refrigerator power socket voltage detection type protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107749717A true CN107749717A (en) | 2018-03-02 |
Family
ID=61254156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021261.1A Pending CN107749717A (en) | 2017-10-27 | 2017-10-27 | A kind of refrigerator power socket voltage detection type protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107749717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446698A (en) * | 2020-04-28 | 2020-07-24 | 白云帆 | Voltage protection circuit of refrigerator |
-
2017
- 2017-10-27 CN CN201711021261.1A patent/CN107749717A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446698A (en) * | 2020-04-28 | 2020-07-24 | 白云帆 | Voltage protection circuit of refrigerator |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180302 |
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| WD01 | Invention patent application deemed withdrawn after publication |