CN207573233U - A kind of electrical equipment and its capacitance automatic discharge circuit - Google Patents
A kind of electrical equipment and its capacitance automatic discharge circuit Download PDFInfo
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- CN207573233U CN207573233U CN201721803630.8U CN201721803630U CN207573233U CN 207573233 U CN207573233 U CN 207573233U CN 201721803630 U CN201721803630 U CN 201721803630U CN 207573233 U CN207573233 U CN 207573233U
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Abstract
The utility model discloses a kind of electrical equipment and its capacitance automatic discharge circuit, the capacitance automatic discharge circuit includes voltage detection module, switch module and discharge module；The voltage detection module is connect respectively with the second ac input end and switch module, for when detecting that AC-input voltage is less than predeterminated voltage and the duration is more than preset time, first control signal is exported to switch module, otherwise exports second control signal to switch module；The switch module is also connect with discharge module, for being connected when receiving first control signal and being turned off when receiving second control signal；The discharge module respectively with the first ac input end and capacitance connection to be discharged, release by the storage charge for being treated when switch module is connected in discharge capacity.Storage charge during automatic vent discharge holds after being powered off detecting exchange input solves the problems, such as that large charge capacitance needs to discharge manually in production process, is substantially improved production efficiency and production capacity.
Description
Technical field
The utility model is related to capacitance discharge technology, more particularly to a kind of electrical equipment and its capacitance automatic discharge circuit.
Background technology
Production automation is following important development direction, and TV production process and the electric discharge of ageing process bucket capacitance are existing at present
Shape manually discharges substantially, seriously affects production efficiency, and manual operation can bring very high fraction defective, while also to after sale
Maintenance personal's electric shock risk.And electrical equipment is since bulky capacitor charge can not release for a long time, and standby lamp is after a loss of power still
It is always on, brings puzzlement to client, mistake thinks that electrical equipment does not power off really, and customer experience is poor.
Thus the prior art could be improved and improve.
Utility model content
Part in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of electrical equipment and its electricity
Hold automatic discharge circuit, the storage charge during automatic vent discharge holds after being powered off detecting exchange input solves production process
The problem of middle large charge capacitance needs manually to discharge, is substantially improved production efficiency and production capacity.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of capacitance automatic discharge circuit, the first ac input end, the second ac input end with electrical equipment and is treated
Discharge capacity connects, and the capacitance automatic discharge circuit includes voltage detection module, switch module and discharge module；The voltage
Detection module is connect respectively with the second ac input end and switch module, for detecting that it is default electric that AC-input voltage is less than
Pressure and when the duration is more than preset time, otherwise output first control signal exports second control signal extremely to switch module
Switch module；The switch module is also connect with discharge module, for being connected and connecing when receiving first control signal
It is turned off when receiving second control signal；The discharge module with the first ac input end and capacitance connection to be discharged, is used for respectively
The storage charge treated when switch module is connected in discharge capacity is released.
In the capacitance automatic discharge circuit, the voltage detection module includes voltage checking chip, the voltage inspection
The HV ends for surveying chip connect the second ac input end, and the DSG ends of the voltage checking chip connect the switch module.
In the capacitance automatic discharge circuit, the switch module includes metal-oxide-semiconductor, the grid connection institute of the metal-oxide-semiconductor
The DSG ends of voltage checking chip are stated, the drain electrode of the metal-oxide-semiconductor connects the discharge module, the source electrode ground connection of the metal-oxide-semiconductor.
In the capacitance automatic discharge circuit, the discharge module includes bleeder resistance, one end of the bleeder resistance
The drain electrode of the metal-oxide-semiconductor is connected, the other end of the bleeder resistance connects the anode of the first ac input end and capacitance to be discharged,
The cathode ground connection of the capacitance to be discharged.
In the capacitance automatic discharge circuit, the model LD5760T of the voltage checking chip.
In the capacitance automatic discharge circuit, the metal-oxide-semiconductor is N-channel MOS pipe.
In the capacitance automatic discharge circuit, the resistance value of the bleeder resistance is less than 27K Ω.
A kind of electrical equipment, including capacitance to be discharged, which is characterized in that further include capacitance automatic discharging electricity as described above
The first ac input end, the second ac input end and the electricity to be discharged of road, the capacitance automatic discharge circuit and electrical equipment
Hold connection.
In the electrical equipment, the rectification module for carrying out rectification to AC-input voltage, the rectification are further included
Module and the first ac input end, the second ac input end and capacitance connection to be discharged.
In the electrical equipment, the rectification module includes the first diode, the second diode, third diode and the
Four diodes；The anode of first diode connects the cathode of first ac input end and the second diode, and described the
The cathode of one diode connects the cathode of the third diode and the anode of capacitance to be discharged；The anode of second diode
Connect the anode and ground of the 4th diode；The anode of the third diode connects second ac input end and the 4th
The cathode of diode.
Compared to the prior art, in electrical equipment and its capacitance automatic discharge circuit provided by the utility model, the electricity
Hold the first ac input end, the second ac input end and the capacitance connection to be discharged of automatic discharge circuit and electrical equipment, institute
It states capacitance automatic discharge circuit and includes voltage detection module, switch module and discharge module；The voltage detection module respectively with
Second ac input end is connected with switch module, for detecting that AC-input voltage is less than predeterminated voltage and the duration is big
When preset time, otherwise output first control signal to switch module exports second control signal to switch module；It is described to open
It closes module also to connect with discharge module, for being connected when receiving first control signal and receiving the second control letter
Number when turn off；The discharge module with the first ac input end and capacitance connection to be discharged, is connected respectively for working as switch module
When the storage charge treated in discharge capacity release.Depositing during automatic vent discharge holds after being powered off detecting exchange input
Storing up electricity lotus solves the problems, such as that large charge capacitance needs manually to discharge in production process, is substantially improved production efficiency and production capacity.
Description of the drawings
Fig. 1 is the structure diagram of capacitance automatic discharge circuit provided by the utility model.
Fig. 2 is the circuit diagram of capacitance automatic discharge circuit provided by the utility model.
Specific embodiment
The utility model provides a kind of electrical equipment and its capacitance automatic discharge circuit, can detect exchange input power-off
Storage charge during automatic vent discharge holds afterwards, solves the problems, such as that large charge capacitance needs manually to discharge in production process, greatly
Width improving production efficiency and production capacity.
To make the purpose of this utility model, technical solution and effect clearer, clear and definite, develop simultaneously implementation referring to the drawings
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only explaining this practicality
It is novel, it is not used to limit the utility model.
Referring to Fig. 1, capacitance automatic discharge circuit 10 provided by the utility model, input is exchanged with the first of electrical equipment
AC_L, the second ac input end AC_N and capacitance C1 connections to be discharged are held, it is automatic for being carried out to the capacitance C1 to be discharged
Electric discharge, the specific capacitance automatic discharge circuit 10 includes voltage detection module 11, switch module 12 and discharge module 13, described
Voltage detection module 11 is connect respectively with the second ac input end AC_N and switch module 12, for detecting exchange input electricity
When pressure is more than preset time less than predeterminated voltage and duration, otherwise output first control signal is exported to switch module 12
Second control signal is to switch module 12；The switch module 12 is also connect with discharge module 13, for receiving the first control
It is connected during signal processed and is turned off when receiving second control signal；The discharge module 13 exchanges input with first respectively
End AC_L is connected with capacitance C1 to be discharged, is carried out for treating the storage charge in discharge capacity C1 when switch module 12 is connected
It releases.
In the present embodiment, the size of AC-input voltage is detected by the voltage detection module 11, is detecting exchange
When input voltage is less than predeterminated voltage and duration and is more than preset time, output first control signal is no to switch module 12
Second control signal is then exported to switch module 12, i.e., detects whether current exchange input powers off by voltage detection module 11,
If AC-input voltage is less than predeterminated voltage and the duration is more than preset time, illustrate that exchange input at this time reliably powers off,
Preferably, the preset time can be set as 5s, and the predeterminated voltage can be set as 20V, when detect AC-input voltage be less than 20V
And the duration when being more than 5s output first control signal to switch module 12, otherwise export second control signal to switch module
12, by setting the trigger condition of predeterminated voltage and preset time, effectively prevent malfunctioning caused by power down, prevent by
Capacitance automatic discharge circuit 10 is caused to work long hours the security risk brought in input voltage fluctuation.
Further, the switch module 12 is held on when receiving the first control signal, is exchanged at this time defeated
Enter and powered off, the switch module 12, which is connected, causes discharge module 13 to start to work, and treats the storage charge in discharge capacity C1
It releases；It is held off when receiving the second control signal, exchange input at this time does not power off, the switch module 12
Shutdown causes discharge module 13 to be stopped, and realizes and the automatic of capacitance C1 to be discharged is controlled to put according to the state of exchange input
Electricity, without traditional dependence jig electric discharge or manual discharge, effective improving production efficiency and production capacity.
Specifically, also referring to Fig. 2, the voltage detection module 11 includes voltage checking chip U1, the voltage inspection
The HV ends for surveying chip U1 connect the DSG ends connection switching molding of the second ac input end AC_N, the voltage checking chip U1
Block 12, in the present embodiment, the HV ends of the voltage checking chip U1 are exchange input detection foot, detect the big of AC-input voltage
The small and duration, and pass through DSG ends output first control signal or second control signal to switch module 12, so as to root
According to the opening and closing of the size control automatic discharging process of AC-input voltage, automatically controlling for capacitance electric discharge is realized, is solved
Certainly production process and ageing process put into the problem of a large amount of manpowers and material resources progress manual discharge, do not need to manually touch, reduce
Process of producing product electrostatic caused by electrion is bad.In the present embodiment, model can be used in the voltage checking chip U1
For the chip of LD5760T, certainly, the chip with other identical functions, the utility model also may be selected in other embodiments
This is not construed as limiting.
Further, the switch module 12 includes the grid connection voltage detecting of metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q1
The DSG ends of chip U1, the drain electrode of the metal-oxide-semiconductor Q1 connect the discharge module 13, the source electrode ground connection of the metal-oxide-semiconductor Q1, this reality
It applies in example, the metal-oxide-semiconductor Q1 is N-channel MOS pipe Q1.The control to 13 working condition of discharge module is realized by metal-oxide-semiconductor Q1
System, when receiving first control signal（It is high level in the present embodiment）When, metal-oxide-semiconductor Q1 conductings make discharge module 13 start pair
The storage charge treated in discharge capacity C1 is released, and receives second control signal（It is low level in the present embodiment）
When, metal-oxide-semiconductor Q1 shutdowns make discharge module 13 stop charge discharging resisting, realize the flexible control of discharge process.
Further, the discharge module 13 is included described in one end connection of bleeder resistance R1, the bleeder resistance R1
The drain electrode of metal-oxide-semiconductor Q1, other end connection the first ac input end AC_L and capacitance C1 to be discharged of the bleeder resistance R1 is just
Pole, the cathode ground connection of the capacitance C1 to be discharged.In the present embodiment, treated in discharge capacity C1 by setting bleeder resistance R1
Storage charge release, when metal-oxide-semiconductor Q1 is connected, the storage charge in capacitance C1 to be discharged will be arrived by bleeder resistance R1
Charge discharging resisting is realized on ground.Preferably, by adjusting the resistance value of bleeder resistance R1 charge discharging resisting speed, the present embodiment can be controlled
In, by the capacitance of capacitance C1 to be discharged for for 136 μ F, if 10s is needed to be released to 20V hereinafter, if bleeder resistance R1 resistance value
Ranging from it is less than 27K Ω, certainly, in other embodiments, can be also chosen according to specific capacitance and rate request of releasing
Suitable resistance value, the utility model are not construed as limiting this.
Capacitance automatic discharge circuit 10 provided by the utility model uses only very simple electronic component, you can realizes
It produces not influencing while is reliably discharged capacitance automatically, simply, easily realized with circuit, of low cost, cost performance
The characteristics of high, eliminate production process need rely on jig electric discharge and aging manual discharge link, be substantially improved production efficiency and
Production capacity, while also solve in appliance applications since bulky capacitor charge can not release for a long time, standby lamp is after a loss of power still
It is always on, mistake thinks the problem of electrical equipment does not power off really, effectively improves customer satisfaction.
Based on above-mentioned capacitance automatic discharge circuit 10, the utility model also provides a kind of electrical equipment, including to be discharged
Capacitance C1 and capacitance automatic discharge circuit 10, the first ac input end of the capacitance automatic discharge circuit 10 and electrical equipment
AC_L, the second ac input end AC_N and capacitance C1 connections to be discharged, the electrical equipment is preferably television set.Due to above
The capacitance automatic discharge circuit 10 is described in detail, details are not described herein again.
Further, as depicted in figs. 1 and 2, the electrical equipment further includes to carry out rectification to AC-input voltage
Rectification module 20, the rectification module 20 and the first ac input end AC_L, the second ac input end AC_N and to be discharged
Capacitance C1 connections.The rectification module 20 includes the first diode D1, the second diode D2, third diode D3 and the four or two pole
Pipe D4；The anode of the first diode D1 connects the cathode of the first ac input end AC_L and the second diode D2, institute
The cathode for stating the first diode D1 connects the cathode of the third diode D3 and the anode of capacitance C1 to be discharged；Described 2nd 2
The anode of pole pipe D2 connects the anode and ground of the 4th diode D4；The anode connection described second of the third diode D3
The cathode of ac input end AC_N and the 4th diode D4.
In conclusion in electrical equipment provided by the utility model and its capacitance automatic discharge circuit, the capacitance is automatic
First ac input end of discharge circuit and electrical equipment, the second ac input end and capacitance connection to be discharged, the capacitance
Automatic discharge circuit includes voltage detection module, switch module and discharge module；The voltage detection module is handed over respectively with second
Stream input terminal is connected with switch module, for detecting that AC-input voltage is less than predeterminated voltage and the duration is more than default
During the time, otherwise output first control signal to switch module exports second control signal to switch module；The switch module
It is also connect with discharge module, for being connected when receiving first control signal and being closed when receiving second control signal
It is disconnected；The discharge module respectively with the first ac input end and capacitance connection to be discharged, for being treated when switch module is connected
Storage charge in discharge capacity is released.Storage electricity during automatic vent discharge holds after being powered off detecting exchange input
Lotus solves the problems, such as that large charge capacitance needs manually to discharge in production process, is substantially improved production efficiency and production capacity.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (10)
1. a kind of capacitance automatic discharge circuit, the first ac input end, the second ac input end with electrical equipment and wait to put
Electric capacitance connection, which is characterized in that the capacitance automatic discharge circuit includes voltage detection module, switch module and electric discharge mould
Block；The voltage detection module is connect respectively with the second ac input end and switch module, for detecting exchange input electricity
When pressure is more than preset time less than predeterminated voltage and duration, otherwise output first control signal to switch module exports the
Two control signals to switch module；The switch module is also connect with discharge module, for when receiving first control signal
It is connected and is turned off when receiving second control signal；The discharge module respectively with the first ac input end and to be discharged
Capacitance connection, the storage charge for being treated when switch module is connected in discharge capacity are released.
2. capacitance automatic discharge circuit according to claim 1, which is characterized in that the voltage detection module includes voltage
Detection chip, the HV ends of the voltage checking chip connect the second ac input end, the DSG ends connection of the voltage checking chip
The switch module.
3. capacitance automatic discharge circuit according to claim 2, which is characterized in that the switch module includes metal-oxide-semiconductor, institute
The grid for stating metal-oxide-semiconductor connects the DSG ends of the voltage checking chip, and the drain electrode of the metal-oxide-semiconductor connects the discharge module, described
The source electrode ground connection of metal-oxide-semiconductor.
4. capacitance automatic discharge circuit according to claim 3, which is characterized in that the discharge module includes vent discharge
Resistance, one end of the bleeder resistance connect the drain electrode of the metal-oxide-semiconductor, other end connection the first exchange input of the bleeder resistance
End and the anode of capacitance to be discharged, the cathode ground connection of the capacitance to be discharged.
5. capacitance automatic discharge circuit according to claim 2, which is characterized in that the model of the voltage checking chip
LD5760T。
6. capacitance automatic discharge circuit according to claim 3, which is characterized in that the metal-oxide-semiconductor is N-channel MOS pipe.
7. capacitance automatic discharge circuit according to claim 4, which is characterized in that the resistance value of the bleeder resistance is less than
27KΩ。
8. a kind of electrical equipment, including capacitance to be discharged, which is characterized in that further include as described in claim 1-7 any one
Capacitance automatic discharge circuit, the first ac input end of the capacitance automatic discharge circuit and electrical equipment, second exchange it is defeated
Enter end and capacitance connection to be discharged.
9. electrical equipment according to claim 8, which is characterized in that further include to carry out rectification to AC-input voltage
Rectification module, the rectification module and the first ac input end, the second ac input end and capacitance connection to be discharged.
10. electrical equipment according to claim 9, which is characterized in that the rectification module includes the first diode, second
Diode, third diode and the 4th diode；The anode of first diode connects first ac input end and the
The cathode of two diodes, the cathode and capacitance to be discharged of the cathode connection third diode of first diode are just
Pole；The anode of second diode connects the anode and ground of the 4th diode；The anode connection of the third diode
The cathode of second ac input end and the 4th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721803630.8U CN207573233U (en) | 2017-12-21 | 2017-12-21 | A kind of electrical equipment and its capacitance automatic discharge circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721803630.8U CN207573233U (en) | 2017-12-21 | 2017-12-21 | A kind of electrical equipment and its capacitance automatic discharge circuit |
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| CN207573233U true CN207573233U (en) | 2018-07-03 |
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| CN201721803630.8U Active CN207573233U (en) | 2017-12-21 | 2017-12-21 | A kind of electrical equipment and its capacitance automatic discharge circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109963396A (en) * | 2018-07-12 | 2019-07-02 | 青岛亿联客信息技术有限公司 | A kind of switch detection circuit |
| CN111555597A (en) * | 2020-03-31 | 2020-08-18 | 芜湖宏景电子股份有限公司 | Residual current discharge circuit of DDR chip power supply circuit |
| CN113054637A (en) * | 2021-03-22 | 2021-06-29 | 上海空间电源研究所 | High-voltage discharge protection circuit for energy storage capacitor after shutdown of satellite load power supply |
-
2017
- 2017-12-21 CN CN201721803630.8U patent/CN207573233U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109963396A (en) * | 2018-07-12 | 2019-07-02 | 青岛亿联客信息技术有限公司 | A kind of switch detection circuit |
| CN111555597A (en) * | 2020-03-31 | 2020-08-18 | 芜湖宏景电子股份有限公司 | Residual current discharge circuit of DDR chip power supply circuit |
| CN113054637A (en) * | 2021-03-22 | 2021-06-29 | 上海空间电源研究所 | High-voltage discharge protection circuit for energy storage capacitor after shutdown of satellite load power supply |
| CN113054637B (en) * | 2021-03-22 | 2022-12-13 | 上海空间电源研究所 | High-voltage discharge protection circuit for energy storage capacitor after shutdown of satellite load power supply |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230412 Address after: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Patentee after: Shenzhen Huaxi Investment Co.,Ltd. Address before: 518000 No. 5, Industrial Avenue, Shekou Industrial Zone, Merchants Street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TCL NEW TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |