CN107342580A - A kind of Anti-surging automatic control protecting device - Google Patents
A kind of Anti-surging automatic control protecting device Download PDFInfo
- Publication number
- CN107342580A CN107342580A CN201611205802.1A CN201611205802A CN107342580A CN 107342580 A CN107342580 A CN 107342580A CN 201611205802 A CN201611205802 A CN 201611205802A CN 107342580 A CN107342580 A CN 107342580A
- Authority
- CN
- China
- Prior art keywords
- phase line
- module
- relay
- discharge
- surging
- Prior art date
- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
Abstract
The invention discloses a kind of Anti-surging automatic control protecting device; the automatic protection unit being connected including relay and with relay; the input connection civil power house lead in of relay; the output end connection electric energy meter of automatic protection unit; the input connection voltage monitoring module of the relay; the control terminal of the relay is connected with MCU micro control units; the output end of the relay is connected with automatic protection unit; current detection module is set between relay and the automatic protection unit, and the voltage detection module and current detection module are connected with MCU micro control units；The voltage detection module is connected by power management module with battery, and the power management module is connected with MCU micro control units；The automatic protection unit includes discharge module, phase line discharge module and resettable fuse between phase line；The present invention is simple in construction, and intelligence degree is high, can prevent surge from causing to damage to household electrical appliance in effect, have good market application value.
Description
Technical field
The present invention relates to household electrical appliance lightning protection field, more particularly to a kind of Anti-surging automatic control protecting device.
Background technology
A kind of natural calamity of the thunder and lightning as most serious in nature, the whole world every year because Lightning Disaster and caused by property damage
Mistake, casualties phenomenon are countless, and as electronic product and the integrated equipment of microelectronics largely use in home environment,
The phenomenon of home electronic appliance system and device damage is also increasingly caused by thunder and lightning causes overvoltage or LEMP
It is more.In daily life staying idle at home, the household electrical appliance for often causing working because of thunder and lightning damage or breakdown aging, or even can draw
Fire is played, therefore, to realize the protection of home electronic appliance system lightning surge, a kind of household electrical appliance thunder and lightning that is used for of invention is protected
Shield, there is the state LCD Dynamic Announces such as thunder and lightning grade automatic identification, alarm times, electric current, voltage, overvoltage, excessively stream, system fortune
Row state LED state indicates that the multiple functions such as lightning surge automated intelligent protection are avoided in thunderstorm weather household electric in one
Device does not pull out plug or a kind of surge automatic control protecting device for being just damaged under working condition have it is highly important
Meaning.As relevant device requires lightning protection increasingly strict, installation carries surge automatic protection (Surge
ProtectionDevice,SPD）Function, surge on limiting circuitry and instantaneous overvoltage, the overcurrent released on circuit into
One of important method for Modern Lightning Protection Technology.
The prior art is defective, it is necessary to improve.
The content of the invention
In order to solve the defects of present technology is present, the invention provides a kind of Anti-surging automatic control protecting device.
Technology official documents and correspondence provided by the invention, a kind of Anti-surging automatic control protecting device, including relay and and relay
The automatic protection unit of connection, the input connection civil power house lead in of relay, the output end connection electric energy of automatic protection unit
Table, the input connection voltage monitoring module of the relay, the control terminal of the relay are connected with MCU micro control units, institute
The output end for stating relay is connected with automatic protection unit, and current detecting mould is set between relay and the automatic protection unit
Block, the voltage detection module and current detection module are connected with MCU micro control units；The voltage detection module passes through power supply
Management module is connected with battery, and the power management module is connected with MCU micro control units；The automatic protection unit includes phase line
Between discharge module, phase line discharge module and resettable fuse, between the phase line discharge module be parallel to phase line N and phase line L it
Between, the phase line discharge module includes two phase lines electric discharge submodules, and two phase lines discharge submodules respectively by phase line N and phase line
L is grounded, and the resettable fuse is series on phase line L and phase line N.
Preferably, connection division module and transformer between the voltage monitoring module and relay input, described point
Die block includes electric capacity C1, electric capacity C2 and resistance R1, electric capacity C1, C2 series connection, and the electric capacity C1 other end is connected to phase line N, electric capacity
The C2 other end connection phase line L, the resistance R1 is parallel to electric capacity C1 or electric capacity C2 both ends, the primary side connection of the transformer
In resistance R1 both ends, the secondary side of transformer connects the voltage monitoring module.
Preferably, discharge module is in series by gas-discharge tube G1 and piezo-resistance RV1 between the phase line, described two
Phase line electric discharge submodule includes the first phase line electric discharge submodule and the second phase line electric discharge submodule, the first phase line electric discharge submodule
Block is in series by piezo-resistance RV2 and gas-discharge tube G2, and described piezo-resistance RV2 one end is connected with phase line N, the other end with
Gas-discharge tube G2 one end connection, gas-discharge tube G2 other end ground connection；The second phase line discharge module is by pressure-sensitive electricity
Resistance RV3 and gas-discharge tube G3 is in series, and described piezo-resistance RV3 one end is connected with phase line L, the other end and gas-discharge tube
G3 one end connection, gas-discharge tube G3 other end ground connection.
Preferably, the MCU micro control units are also connected with key-press module and display unit, and the display unit includes liquid crystal
Show module and LED state indicator lamp.
Preferably, the key-press module is fixed on the edge of LCD MODULE, and the LED state indicator lamp is fixed on liquid
One jiao of brilliant display module.
Preferably, the current detection module is connected by current transformer with relay output end.
Preferably, the MCU micro-control units are STM32F103 microcontrollers.
Preferably, the transformer is adjustable variable-pressure device.
Relative to the beneficial effect of prior art, a kind of Anti-surging automatic control protecting device provided by the invention, have
The state LCD Dynamic Announces such as thunder and lightning grade automatic identification, alarm times, electric current, voltage, overvoltage, excessively stream, system running state
LED state indicates that the multiple functions such as lightning surge automated intelligent protection avoid not pulling out in thunderstorm weather household electrical appliance in one
Plug is just damaged under working condition；Automatic protection unit is set, and surge that on the one hand can be on limiting circuitry is instantaneous
Overvoltage, the overcurrent released on circuit, on the other hand it can overloaded in household electrical appliance, automatic fuse protection during overcurrent,
It is automatic after fixing a breakdown to recover protection；The present invention is simple in construction, and intelligence degree is high, in effect surge can be prevented to household electrical appliance
Cause to damage, there is good market application value.
Brief description of the drawings
Fig. 1 is connection diagram of the present invention；
Fig. 2 is that division module of the present invention is connected circuit diagram with transformer；
Fig. 3 is automatic protection modular circuit schematic diagram of the present invention.
Embodiment
It should be noted that above-mentioned each technical characteristic continues to be mutually combined, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the scope of description of the invention record；Also, for those of ordinary skills, it can add according to the above description
To improve or convert, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
For the ease of understanding the present invention, below in conjunction with the accompanying drawings and specific embodiment, the present invention will be described in more detail.
The preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, and it is unlimited
In the embodiment described by this specification.On the contrary, the purpose for providing these embodiments makes to the disclosure
Understand more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " vertical ", " horizontal ",
"left", "right" and similar statement are for illustrative purposes only.
Unless otherwise defined, technology all used in this specification and scientific terminology are led with belonging to the technology of the present invention
The implication that the technical staff in domain is generally understood that is identical.Used term is simply in the description of the invention in this specification
The purpose of description specific embodiment, it is not intended to the limitation present invention.
The present invention is elaborated below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2 and Figure 3, a kind of Anti-surging automatic control protecting device, including relay and with relay connect
The automatic protection unit connect, the input connection civil power house lead in of relay, the output end connection electric energy meter of automatic protection unit,
The input connection voltage monitoring module of the relay, the control terminal of the relay is connected with MCU micro control units, it is described after
The output end of electrical equipment is connected with automatic protection unit, and current detection module is set between relay and the automatic protection unit,
The voltage detection module and current detection module are connected with MCU micro control units；The voltage detection module passes through power supply pipe
Reason module is connected with battery, and the power management module is connected with MCU micro control units；The automatic protection unit is included between phase line
Discharge module, phase line discharge module and resettable fuse, discharge module is parallel between phase line N and phase line L between the phase line,
The phase line discharge module includes two phase lines electric discharge submodules, and two phase lines electric discharge submodules respectively meet phase line N and phase line L
Ground, the resettable fuse are series on phase line L and phase line N.
Preferably, connection division module and transformer between the voltage monitoring module and relay input, described point
Die block includes electric capacity C1, electric capacity C2 and resistance R1, electric capacity C1, C2 series connection, and the electric capacity C1 other end is connected to phase line N, electric capacity
The C2 other end connection phase line L, the resistance R1 is parallel to electric capacity C1 or electric capacity C2 both ends, the primary side connection of the transformer
In resistance R1 both ends, the secondary side of transformer connects the voltage monitoring module.
Preferably, discharge module is in series by gas-discharge tube G1 and piezo-resistance RV1 between the phase line, described two
Phase line electric discharge submodule includes the first phase line electric discharge submodule and the second phase line electric discharge submodule, the first phase line electric discharge submodule
Block is in series by piezo-resistance RV2 and gas-discharge tube G2, and described piezo-resistance RV2 one end is connected with phase line N, the other end with
Gas-discharge tube G2 one end connection, gas-discharge tube G2 other end ground connection；The second phase line discharge module is by pressure-sensitive electricity
Resistance RV3 and gas-discharge tube G3 is in series, and described piezo-resistance RV3 one end is connected with phase line L, the other end and gas-discharge tube
G3 one end connection, gas-discharge tube G3 other end ground connection.
Preferably, the MCU micro control units are also connected with key-press module and display unit, and the display unit includes liquid crystal
Show module and LED state indicator lamp.
Preferably, the key-press module is fixed on the edge of LCD MODULE, and the LED state indicator lamp is fixed on liquid
One jiao of brilliant display module.
Preferably, the current detection module is connected by current transformer with relay output end.
Preferably, the MCU micro-control units are STM32F103 microcontrollers.
Preferably, the transformer is adjustable variable-pressure device.
During installation, Anti-surging automatic control protecting device is installed between house lead in and electric energy meter, passes through electric capacity C1, electricity
Hold two electric capacity of C2 and partial pressure is carried out to the 220V AC-input voltages on house lead in, realization is once depressured, and voltage detection module is led to
Detection resistance R1 both end voltages are crossed to obtain input voltage value, because lightning surge voltage instantaneous is very high, therefore pass through transformer
Secondary decompression is carried out, and due to the characteristics of lightning surge voltage is high, and electric current is big, easily causes the damage of electronic circuit, therefore lead to
The method for crossing transformer isolation eliminates surge high voltage to influence caused by micro control system, by changing primary/pair
Level coil bundles number than come adjust voltage detection module detect surge voltage sensitivity, in the case of no surge voltage,
The present invention obtains line voltage value by above-mentioned decompression twice, i.e., the low-voltage that voltage detection module monitors passes through calculating partial pressure
Ratio and transformation ratio obtain outer net high-voltage value.
Preferably, set to prevent lightning surge voltage from causing to damage to voltage detection module, in voltage detection module anti-
Thunder protection circuit.Before lightning surge does not come, the voltage on house lead in, current detecting mould are monitored by voltage detection module
Block obtains the total current for flowing through household electrical appliance by current transformer, after lightning surge arrives, passes through voltage detection module
To monitor the voltage on house lead in, and magnitude of voltage is transferred to MCU micro control units, according to what is be previously stored in MCU micro control units
Data divide the grade of lightning surge, and record duration and the surge number of lightning surge, when detecting surge rank
Higher than setting rank when, disconnected by MCU micro control units control relay, electric energy supply is broken with household electrical appliance
Open, so as to realize purpose that resident's household electrical appliance are protected, when through after a period of time, MCU micro control units do not perceive wave
When gushing voltage, MCU micro control units meeting control relay re-closes, and outer net voltage is reconnected to house is supplied among household electrical appliance
Electrical appliance uses, with the display unit that MCU micro control units are connected to surge grade, surge duration, surge number, current stream
Total current value through household electrical appliance, relay disconnection times carry out Dynamic Announce, and key-press module is used to set LCD MODULE
Parameter or carry out page turning, pass through LED state indicator lamp and show relay disconnection/closed mode.
Power management module carries out management of charging and discharging to battery, and when surge phenomenon does not occur, the present apparatus is in normal work
In the case of work, voltage on house lead in is obtained by power detecting module, and charged the battery by power management module, works as surge
After phenomenon occurs, it is powered by battery to MCU micro control units and with the device that MCU micro control units are connected, until MCU is micro-
Control unit detect the voltage stabilization on house lead in after, by power management module to micro control unit and with MCU micro control unit phases
The device of connection is powered, while is charged by power management module to battery.
When MCU micro control units detect that lightning surge is higher than certain rank, MCU micro control units control relay disconnects, and makes
Electric energy supply disconnects with household electrical appliance on house lead in, to have the function that to protect household electrical appliance；When thunder and lightning rank is relatively low, up to setting
When defining the level other, burning voltage is exported by automatic protection unit, when voltage produces surge and moment liter because of thunder and lightning on house lead in
Gao Shi, the resistance moment for being parallel to the gas-discharge tube G1 between phase line N and phase line L between phase line on discharge module reduce and punctured
Electric discharge, while the voltage instantaneous for being added in piezo-resistance RV1 both ends is raised so as to cause the resistance moment of piezo-resistance to reduce,
So as to export stable voltage, while two phase lines electric discharge submodule of phase line discharge module, i.e. piezo-resistance RV2 and gas are put
Fulgurite G2 connects, and piezo-resistance RV3 and gas-discharge tube G3 series connection, is discharged to phase line N and phase line L, so as to export stabilization
Voltage.
Phase line discharge module preventing mechanism：During normal work, gas-discharge tube is not turned on, and piezo-resistance does not have leakage current,
Service life can be greatly prolonged；During by surge impact, gas-discharge tube punctures first, then limits surge electricity by piezo-resistance
Pressure, total residual voltage are both sums；After the impact past, because piezo-resistance limits electric current, gas-discharge tube can not maintain to lead
Lead to and blow-out, revert to normal operating conditions；After piezo-resistance short-circuit failure, because gas-discharge tube flows through very big power frequency electric
Stream can be also quickly invalidated, but its failure mode is open circuit, thus be not easy to cause fire.And without distinguishing zero line and live wire,
Electrical appliance can arbitrarily be plugged and can protected.
When overcurrent is occurring for household electrical appliance, resettable fuse is protected, when household electrical appliance total current is excessive or
When producing short trouble, output is automatically cut off by resettable fuse, plays overprotection household electrical appliance, after fixing a breakdown
It is automatic to recover protection.
It should be noted that above-mentioned each technical characteristic continues to be mutually combined, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the scope of description of the invention record；Also, for those of ordinary skills, it can add according to the above description
To improve or convert, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (8)
1. a kind of Anti-surging automatic control protecting device, including relay and the automatic protection unit that is connected with relay, relay
The input connection civil power house lead in of device, the output end connection electric energy meter of automatic protection unit, it is characterised in that the relay
Input connection voltage monitoring module, the control terminal of the relay is connected with MCU micro control units, the output of the relay
End is connected with automatic protection unit, and current detection module, the voltage inspection are set between relay and the automatic protection unit
Survey module and current detection module is connected with MCU micro control units；The voltage detection module passes through power management module and electricity
Pond is connected, and the power management module is connected with MCU micro control units；The automatic protection unit include phase line between discharge module,
Phase line discharge module and resettable fuse, discharge module is parallel between phase line N and phase line L between the phase line, the phase line
Discharge module includes two phase lines electric discharge submodules, and phase line N and phase line L is grounded by two phase lines electric discharge submodules respectively, described
Resettable fuse is series on phase line L and phase line N.
A kind of 2. Anti-surging automatic control protecting device according to claim 1, it is characterised in that the voltage monitoring module
Division module and transformer are connected between relay input, the division module includes electric capacity C1, electric capacity C2 and resistance R1,
Electric capacity C1, C2 connect, and the electric capacity C1 other end is connected to phase line N, and electric capacity C2 other end connection phase line L, the resistance R1 is simultaneously
Electric capacity C1 or electric capacity C2 both ends are coupled to, the primary side of the transformer is connected to resistance R1 both ends, the secondary side connection of transformer
The voltage monitoring module.
3. a kind of Anti-surging automatic control protecting device according to claim 1, it is characterised in that discharge mould between the phase line
Block is in series by gas-discharge tube G1 and piezo-resistance RV1, and described two phase line electric discharge submodules discharge including the first phase line
Submodule and the second phase line electric discharge submodule, first phase line discharge submodule by piezo-resistance RV2 and gas-discharge tube G2
In series, described piezo-resistance RV2 one end is connected with phase line N, and the other end is connected with gas-discharge tube G2 one end, and gas is put
Fulgurite G2 other end ground connection；The second phase line discharge module is in series by piezo-resistance RV3 and gas-discharge tube G3, institute
State piezo-resistance RV3 one end to be connected with phase line L, the other end is connected with gas-discharge tube G3 one end, and gas-discharge tube G3's is another
One end is grounded.
A kind of 4. Anti-surging automatic control protecting device according to claim 1, it is characterised in that the MCU micro control units
Key-press module and display unit are also connected with, the display unit includes LCD MODULE and LED state indicator lamp.
5. a kind of Anti-surging automatic control protecting device according to claim 4, it is characterised in that the key-press module is fixed
In the edge of LCD MODULE, the LED state indicator lamp is fixed on one jiao of LCD MODULE.
A kind of 6. Anti-surging automatic control protecting device according to claim 1, it is characterised in that the current detection module
It is connected by current transformer with relay output end.
A kind of 7. Anti-surging automatic control protecting device according to claim 1, it is characterised in that the MCU microcontrollers list
Member is STM32F103 microcontrollers.
8. a kind of Anti-surging automatic control protecting device according to claim 1, it is characterised in that the transformer is adjustable
Formula transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205802.1A CN107342580A (en) | 2016-12-23 | 2016-12-23 | A kind of Anti-surging automatic control protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205802.1A CN107342580A (en) | 2016-12-23 | 2016-12-23 | A kind of Anti-surging automatic control protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342580A true CN107342580A (en) | 2017-11-10 |
Family
ID=60221963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611205802.1A Pending CN107342580A (en) | 2016-12-23 | 2016-12-23 | A kind of Anti-surging automatic control protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107342580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008272A (en) * | 2017-12-28 | 2018-05-08 | 天津卓越信通科技有限公司 | A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through |
| WO2021052205A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280631A (en) * | 2014-09-28 | 2015-01-14 | 深圳市科威电子测试有限公司 | SPD online intelligent monitoring device and SPD online intelligent monitoring system |
| CN205301568U (en) * | 2015-09-28 | 2016-06-08 | 国网安徽省电力公司肥东县供电公司 | Intelligent ammeter detection module based on bluetooth communication and 485 communications |
| CN105896512A (en) * | 2015-10-28 | 2016-08-24 | 苏州研工电子科技有限公司 | Lightning stroke-proof surge circuit |
| US20160315462A1 (en) * | 2013-12-18 | 2016-10-27 | Xenixwin Co., Ltd | Digital current leakage breaker |
| CN106208353A (en) * | 2016-08-30 | 2016-12-07 | 成都英格瑞德电气有限公司 | Uninterrupted power source based on SPD |
-
2016
- 2016-12-23 CN CN201611205802.1A patent/CN107342580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160315462A1 (en) * | 2013-12-18 | 2016-10-27 | Xenixwin Co., Ltd | Digital current leakage breaker |
| CN104280631A (en) * | 2014-09-28 | 2015-01-14 | 深圳市科威电子测试有限公司 | SPD online intelligent monitoring device and SPD online intelligent monitoring system |
| CN205301568U (en) * | 2015-09-28 | 2016-06-08 | 国网安徽省电力公司肥东县供电公司 | Intelligent ammeter detection module based on bluetooth communication and 485 communications |
| CN105896512A (en) * | 2015-10-28 | 2016-08-24 | 苏州研工电子科技有限公司 | Lightning stroke-proof surge circuit |
| CN106208353A (en) * | 2016-08-30 | 2016-12-07 | 成都英格瑞德电气有限公司 | Uninterrupted power source based on SPD |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008272A (en) * | 2017-12-28 | 2018-05-08 | 天津卓越信通科技有限公司 | A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through |
| WO2021052205A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
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| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20171110 |