CN113534005B - Electric leakage detection method of cleaning machine - Google Patents
Electric leakage detection method of cleaning machine Download PDFInfo
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- CN113534005B CN113534005B CN202110701121.9A CN202110701121A CN113534005B CN 113534005 B CN113534005 B CN 113534005B CN 202110701121 A CN202110701121 A CN 202110701121A CN 113534005 B CN113534005 B CN 113534005B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/55—Testing for incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/56—Testing of electric apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
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- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a leakage detection method of a cleaning machine, wherein a zero line and a live line of a power supply of the cleaning machine are respectively connected with a leakage detection circuit; detecting and acquiring a first detection waveform of a leakage detection circuit connected to a zero line; detecting and acquiring a second detection waveform of a leakage detection circuit connected to the live wire; calculating a duty ratio A of low and high levels in the first detection waveform, and calculating a duty ratio B of low and high levels in the second detection waveform; and respectively comparing the A and the B with preset low and high level duty ratio reference values corresponding to different connection conditions of the zero line, the live line and the ground line and whether the electric leakage state exists under different connection conditions, and further determining whether the zero line and the live line are reversely connected in the cleaning process, whether the ground line is connected and whether the electric leakage condition exists. The electric leakage detection method of the cleaning machine can effectively identify the situations that the zero line and the live line are in positive and negative connection, the ground line is connected or not and the electric leakage occurs or not.
Description
Technical Field
The invention relates to a leakage detection method of a cleaning machine.
Background
In the current market, aiming at the electric leakage protection of the cleaning machine, an electric leakage detection circuit is mainly added on a zero line, and then whether the cleaning machine is in an electric leakage state or not is identified through software. The present electric leakage detection scheme can't effectual detection zero live wire's reversal condition usually, can carry out electric leakage warning to zero live wire reversal, but in the cleaning machine is used, the cleaning machine still can normally work when zero live wire reversal, need not to carry out electric leakage warning under this condition, so then can lead to because of zero live wire reversal causes the electric leakage trouble too much, has improved the maintenance rate of product, has increased product cost of maintenance. In addition, under the condition that the ground wire of the cleaning machine is disconnected or damaged, effective identification cannot be carried out, and certain potential safety hazards exist in the use of the cleaning machine.
Disclosure of Invention
The invention aims to solve the technical problem of providing a leakage detection method of a cleaning machine, which can effectively identify the situations of positive and negative connection of zero and live wires, connection of ground wires and leakage of electricity.
The technical scheme adopted by the invention for solving the technical problems is as follows: a leakage detection method of a cleaning machine is characterized in that: the zero line and the live line of the power supply of the cleaning machine are respectively connected with a leakage detection circuit;
detecting and acquiring a first detection waveform of a leakage detection circuit connected to a zero line;
detecting and obtaining a second detection waveform of a leakage detection circuit connected to the live wire;
calculating a low and high level duty ratio A in the first detection waveform, and calculating a low and high level duty ratio B in the second detection waveform;
and comparing the A and the B with preset low and high level duty ratio reference values corresponding to the zero line, the live line and the ground line under different connection conditions and whether the electric leakage state exists under different connection conditions, and further determining whether the zero line and the live line are reversely connected in the cleaning process, whether the ground line is connected and whether the electric leakage condition exists.
Preferably, the preset reference values of the duty cycle ratios of the low level and the high level corresponding to different connection conditions of the zero line, the live line and the ground line and whether the leakage state exists under the different connection conditions include the following steps:
when the zero live wire is normally connected, the ground wire is normally connected and no electric leakage occurs, the first detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are 0; the second detection waveform is a high-low level waveform which changes periodically, and the duty ratio reference value of the low level and the high level in the corresponding second waveform is P1;
when the zero live wire is reversely connected, the ground wire is normally connected and no electric leakage occurs, the second detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are 0; the first detection waveform is a high-low level waveform which changes periodically, and the duty ratio reference value of the low level and the high level in the corresponding first waveform is P1;
when the zero live wire is normally connected, the ground wire is not connected or damaged and no electric leakage occurs, the first detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are 0; the second detection waveform is a high-low level waveform with periodically changed periods, and the low-high level duty ratio reference value in the corresponding second waveform is P2 different from P1;
when the zero live wire is reversely connected, the ground wire is not connected or damaged and no electric leakage occurs, the second detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are 0; the first detection waveform is a high-low level waveform which changes periodically, and the low-high level duty ratio reference value in the corresponding first waveform is P2 which is different from P1;
under the condition of electric leakage, the first detection waveform and the second detection waveform are both non-continuous high levels, and the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are both non-0 data;
when A =0 and B = P1, judging that the zero live wire is normally connected, the ground wire is normally connected and no electric leakage occurs;
when A = P1 and B =0, judging that the zero live wire is reversely connected, the ground wire is normally connected and no electric leakage occurs;
when A =0 and B ≠ P1, judging that the zero live wire is normally connected, the ground wire is not connected or damaged, and no electric leakage occurs;
when A is not equal to P1 and B =0, judging that the zero live wire is reversely connected, the ground wire is not connected or damaged and no electric leakage occurs;
and when A is not equal to 0 and B is not equal to 0, judging the condition of electric leakage, and correspondingly performing electric leakage alarm.
Further, for the case where leakage occurs:
when the electricity leakage occurs under the condition of connecting the ground wire, the first detection waveform and the second detection waveform are both continuous low levels, the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are 1, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are 1;
when the electricity leakage condition occurs under the condition that the ground wire is not connected, the first detection waveform and the second detection waveform are both high-low level waveforms which change periodically, the low-high level duty ratio reference value corresponding to the corresponding first detection waveform is P3 which is different from P1 and P2, and the low-high level duty ratio reference value corresponding to the corresponding second detection waveform is P4 which is different from P1 and P2;
when A = B =1, judging that the electric leakage condition occurs under the condition of connecting the ground wire, and performing electric leakage alarm at the moment;
and when A = P3 and B = P4, judging that the electric leakage occurs under the condition that the ground wire is not connected, and alarming the electric leakage and simultaneously alarming that the ground wire is not connected.
Preferably, under the condition of no electric leakage, if the situation that the zero line and the live line are reversely connected and the ground line is normally connected is judged, no fault alarm is carried out; and if the ground wire is judged to be not connected or damaged, whether ground wire fault alarm is carried out is set according to the requirement.
Compared with the prior art, the invention has the advantages that: the electric leakage detection method of the cleaning machine can completely identify the fault condition caused by the reverse connection of the zero line and the live line or the non-connection of the ground line, and further set alarm modes of different conditions according to requirements, for example, the alarm can not be carried out under the condition that only the reverse connection of the zero line and the live line is carried out but not the fault is reported necessarily, the report rate in the aspect of electric leakage faults is reduced to the maximum extent, and the maintenance rate of the whole machine is reduced. In addition, the electric leakage detection method of the cleaning machine can still accurately identify the electric leakage condition and report the electric leakage fault under the condition that the ground wires are not connected or damaged, and simultaneously remind a user that the ground wires are not connected, so that the potential safety use hazard of the user is reduced.
Drawings
Fig. 1 is a flowchart of a leakage detecting method of a cleaning machine according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The leakage detection circuit in the chinese utility model patent "a leakage fault detection circuit" with the publication number CN207764335U can be utilized to connect the leakage detection circuit on the zero line and the live line of the power supply of the cleaning machine, so as to detect the leakage condition.
According to the experimental test, detection waveforms are different according to different wiring conditions and electric leakage conditions, and low and high level duty cycle ratio reference values corresponding to whether electric leakage states exist or not under different connection conditions of a zero line, a live line and a ground line and different connection conditions can be preset according to experimental results. The specific experimental results are as follows:
when the zero live wire is normally connected, the ground wire is normally connected and no electric leakage occurs, the first detection waveform is a continuous high level, and duty ratio reference values of low and high levels corresponding to the first detection waveform are correspondingly preset to be 0; the second detection waveform is a high-low level waveform which changes periodically, the duty ratio of the low level and the high level in the corresponding second waveform is P1, and the reference value of the duty ratio of the low level and the high level in the corresponding preset second waveform is P1.
When the zero live wire is reversely connected, the ground wire is normally connected and no electric leakage occurs, the second detection waveform is a continuous high level, and duty ratio reference values of low level and high level corresponding to the second detection waveform are preset to be 0 correspondingly; the first detection waveform is a high-low level waveform which changes periodically, the duty ratio of the low level and the high level in the corresponding first waveform is P1, and the reference value of the duty ratio of the low level and the high level in the corresponding preset first waveform is P1.
When the zero line and the live line are normally connected, the ground line is not connected or damaged and electric leakage does not occur, the first detection waveform is a continuous high level, and the duty cycle ratio reference values of the low level and the high level corresponding to the first detection waveform are 0; the second detection waveform is a high-low level waveform with a period varying, and the duty ratio of the low and high levels in the corresponding second waveform is P2 different from P1, and the reference value of the duty ratio of the low and high levels in the corresponding second waveform is preset as P2.
When the zero line and the live line are reversely connected, the ground line is not connected or damaged and electric leakage does not occur, the second detection waveform is a continuous high level, and low and high level duty cycle ratio reference values corresponding to the second detection waveform are correspondingly preset to be 0; the first detection waveform is a high-low level waveform which changes periodically, the duty ratio of the low level and the high level in the corresponding first waveform is P2 different from P1, and the reference value of the duty ratio of the low level and the high level in the corresponding preset first waveform is P2;
under the condition of electric leakage, both the first detection waveform and the second detection waveform are non-continuous high levels, and both the low-level duty cycle ratio reference value and the high-level duty cycle ratio reference value corresponding to the corresponding preset first detection waveform are non-0 data.
For the case where leakage occurs, specifically, the following is made:
when the leakage occurs under the condition of being connected with a ground wire, the first detection waveform and the second detection waveform are both continuous low levels, the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are correspondingly preset to be 1, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are preset to be 1.
When the electricity leakage occurs under the condition that the ground wire is not connected, the first detection waveform and the second detection waveform are both high-low level waveforms which change periodically, the corresponding low-high level duty ratio of the first detection waveform is P3 which is different from P1 and P2, and the corresponding low-high level duty ratio of the second detection waveform is P4 which is different from P1 and P2. The duty ratio reference values of low and high levels corresponding to the first detection waveform are preset to be P3, and the duty ratio reference values of low and high levels corresponding to the second detection waveform are preset to be P4. In this case, the specific data of P3 and P4 corresponding to the normal connection of the zero line and the reverse connection of the zero line and the live line are exchanged.
As shown in FIG. 1, the method for detecting the electric leakage of the cleaning machine comprises the following steps.
S1, detecting and obtaining a first detection waveform of a leakage detection circuit connected to a zero line;
s2, detecting and obtaining a second detection waveform of a leakage detection circuit connected to the live wire;
s3, calculating a low-level and high-level duty time ratio A in the first detection waveform, and calculating a low-level and high-level duty time ratio B in the second detection waveform;
and S4, comparing the A and the B with preset low and high level duty ratio reference values corresponding to the zero line, the live line and the ground line under different connection conditions and whether the electric leakage state is caused under different connection conditions, and further determining whether the zero line and the live line are reversely connected in the cleaning process, whether the ground line is connected and whether the electric leakage condition is caused.
Specifically, when a =0 and B = P1, it is determined that the zero live wire is normally connected, the ground wire is normally connected, and no leakage occurs, and at this time, no leakage fault alarm is performed.
When A = P1 and B =0, the zero line and the live line are reversely connected, the ground line is normally connected and no electric leakage occurs, as the reverse connection of the zero line and the live line has no influence on the normal work of the cleaning machine, the electric leakage fault alarm is not carried out at the moment, and only the reverse connection condition of the zero line and the live line is recorded so as to be provided for a place needing the information for use.
When A =0 and B ≠ P1, normally the conditions of A =0 and B = P2, judging that the zero live wire is normally connected, the ground wire is not connected or damaged, and no electric leakage occurs;
when a ≠ P1 and B =0, and when a = P2 and B =0 are usually the cases, it is determined that the zero live wire is reversely connected, the ground wire is not connected or damaged, and the leakage is not generated, and the case of the zero live wire reverse connection is also recorded.
And when A is not equal to 0 and B is not equal to 0, judging the condition of electric leakage, and correspondingly alarming the electric leakage.
In order to effectively determine the ground connection condition at this time when the leakage occurs, the following two conditions can be specifically determined:
1) When A = B =1, judging that the electric leakage occurs under the condition of being connected with a ground wire, and performing electric leakage alarm at the moment;
2) And when A = P3 and B = P4, judging that the electric leakage occurs under the condition that the ground wire is not connected, and alarming the electric leakage and simultaneously alarming that the ground wire is not connected. And judging the connection condition of the null line and the live line according to the specific data of P3 and P4.
Because potential safety hazards exist when the ground wire is not connected or damaged, whether ground wire fault alarming is carried out or not can be set according to requirements under the condition that the ground wire is not connected or damaged, and the ground wire fault alarming can be usually selected to ensure the use safety of the cleaning machine.
The electric leakage detection method of the cleaning machine can completely identify the fault condition caused by the reverse connection of the zero line and the live line or the non-connection of the ground line, and further set alarm modes of different conditions according to requirements, for example, the alarm can not be carried out under the condition that only the reverse connection of the zero line and the live line is carried out but not the fault is reported necessarily, the report rate in the aspect of electric leakage faults is reduced to the maximum extent, and the maintenance rate of the whole machine is reduced. In addition, the electric leakage detection method of the cleaning machine can still accurately identify the electric leakage condition and report the electric leakage fault under the condition that the ground wires are not connected or damaged, and simultaneously remind a user that the ground wires are not connected, so that the potential safety use hazard of the user is reduced.
Claims (3)
1. A leakage detection method of a cleaning machine is characterized in that: the zero line and the live line of the power supply of the cleaning machine are respectively connected with a leakage detection circuit;
the preset reference values of the low and high level duty cycle ratios corresponding to different connection conditions of the zero line, the live line and the ground line and whether the leakage state exists under different connection conditions comprise the following steps:
when the zero live wire is normally connected, the ground wire is normally connected and no electric leakage occurs, the first detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are 0; the second detection waveform is a high-low level waveform which changes periodically, and the duty ratio reference value of the low level and the high level in the corresponding second waveform is P1;
when the zero live wire is reversely connected, the ground wire is normally connected and no electric leakage occurs, the second detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are 0; the first detection waveform is a high-low level waveform which changes periodically, and the duty ratio reference value of the low level and the high level in the corresponding first waveform is P1;
when the zero live wire is normally connected, the ground wire is not connected or damaged and no electric leakage occurs, the first detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are 0; the second detection waveform is a high-low level waveform with periodically changed periods, and the low-high level duty ratio reference value in the corresponding second waveform is P2 different from P1;
when the zero live wire is reversely connected, the ground wire is not connected or damaged and no electric leakage occurs, the second detection waveform is a continuous high level, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are 0; the first detection waveform is a high-low level waveform which changes periodically, and the low-high level duty ratio reference value in the corresponding first waveform is P2 which is different from P1;
detecting and acquiring a first detection waveform of a leakage detection circuit connected to a zero line;
detecting and obtaining a second detection waveform of a leakage detection circuit connected to the live wire;
calculating a duty ratio A of low and high levels in the first detection waveform, and calculating a duty ratio B of low and high levels in the second detection waveform;
comparing the A and the B with preset low and high level duty ratio reference values corresponding to different connection conditions of a zero line, a live line and a ground line and whether the electric leakage state exists under different connection conditions, and further determining whether the zero line and the live line are reversely connected in the cleaning process, whether the ground line is connected and whether the electric leakage condition exists;
under the condition of electric leakage, the first detection waveform and the second detection waveform are both non-continuous high levels, and the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are both non-0 data;
when A =0 and B = P1, judging that the zero live wire is normally connected, the ground wire is normally connected and no electric leakage occurs;
when A = P1 and B =0, judging that the zero live wire is reversely connected, the ground wire is normally connected and no electric leakage occurs;
when A =0 and B ≠ P1, judging that the zero live wire is normally connected, the ground wire is not connected or damaged, and no electric leakage occurs;
when A is not equal to P1 and B =0, judging that the zero live wire is reversely connected, the ground wire is not connected or damaged and no electric leakage occurs;
and when A is not equal to 0 and B is not equal to 0, judging the condition of electric leakage, and correspondingly performing electric leakage alarm.
2. A leakage detecting method for a cleaning machine according to claim 1, characterized in that: for the case where leakage occurs:
when the electricity leakage occurs under the condition of connecting the ground wire, the first detection waveform and the second detection waveform are both continuous low levels, the duty ratio reference values of the low level and the high level corresponding to the first detection waveform are 1, and the duty ratio reference values of the low level and the high level corresponding to the second detection waveform are 1;
when the electricity leakage occurs under the condition that the ground wire is not connected, the first detection waveform and the second detection waveform are both high-low level waveforms which change periodically, the duty ratio reference values of low and high levels corresponding to the first detection waveform are P3 which is different from P1 and P2, and the duty ratio reference values of low and high levels corresponding to the second detection waveform are P4 which is different from P1 and P2;
when A = B =1, judging that the electric leakage occurs under the condition of being connected with a ground wire, and performing electric leakage alarm at the moment;
when A = P3 and B = P4, it is judged that the earth leakage occurs when the earth wire is not connected, and at this time, an earth wire non-connection alarm is performed simultaneously with the earth wire leakage alarm.
3. A leakage detecting method for a washing machine according to claim 1 or 2, characterized in that: under the condition of no electric leakage, if the situation that the zero line and the live line are reversely connected and the ground line is normally connected is judged, no fault alarm is carried out; and if the ground wire is judged to be unconnected or damaged, whether ground wire fault alarm is carried out or not is set according to the requirement.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183144A (en) * | 2007-12-05 | 2008-05-21 | 海信集团有限公司 | Single-phase power-supply wiring judgement method and single-phase power supply phase testing circuit |
| CA2853175A1 (en) * | 2011-11-12 | 2013-05-16 | Wei Wu | Method of electricity leakage detection and prevention of electrical equipment's outer surface and system thereof |
| CN107727987A (en) * | 2017-09-26 | 2018-02-23 | 捍防（苏州）实业有限公司 | A kind of Electrical Safety analysis method |
| CN110058105A (en) * | 2018-01-19 | 2019-07-26 | 宁波方太厨具有限公司 | A kind of detection circuit and its detection method of leak current fault |
| CN209446706U (en) * | 2019-01-16 | 2019-09-27 | 苏州富晟一杭汽车部件有限公司 | Charging gun 3-phase plug protective wire does not connect detection circuit |
| CN210038128U (en) * | 2019-05-14 | 2020-02-07 | 华立科技股份有限公司 | Detection circuit for identifying reverse connection of fire and zero lines and PCB |
| CN112068040A (en) * | 2020-09-14 | 2020-12-11 | 珠海格力电器股份有限公司 | Connection detection circuit and method and electric equipment |
| CN212321817U (en) * | 2020-01-02 | 2021-01-08 | 青岛鼎信通讯股份有限公司 | Circuit for detecting positive and negative connection of zero and live wires |
| CN212749196U (en) * | 2020-07-03 | 2021-03-19 | 广西诚新慧创科技有限公司 | Input/output ground wire detection circuit |
| CN112666488A (en) * | 2019-09-30 | 2021-04-16 | 江苏万帮德和新能源科技股份有限公司 | Ground fault detection method and device |
| CN112946535A (en) * | 2021-02-25 | 2021-06-11 | 广汽丰田汽车有限公司 | Power supply socket abnormity detection device, power consumption protection device and charging protection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420414A (en) * | 2010-09-27 | 2012-04-18 | 通领科技集团有限公司 | High-sensitivity leakage current detection circuit breaker |
| CN204290310U (en) * | 2014-12-15 | 2015-04-22 | 陈泽 | A kind of oppositely ground protection circuit and ground-fault interrupter |
| US11243265B2 (en) * | 2017-09-22 | 2022-02-08 | Chengli Li | Intelligent leakage current detection and interruption device for power cord |
| US11977118B2 (en) * | 2020-02-27 | 2024-05-07 | Pass & Seymour, Inc. | Tester for a frequency-dependent ground fault interrupt wiring device |
-
2021
- 2021-06-24 CN CN202110701121.9A patent/CN113534005B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183144A (en) * | 2007-12-05 | 2008-05-21 | 海信集团有限公司 | Single-phase power-supply wiring judgement method and single-phase power supply phase testing circuit |
| CA2853175A1 (en) * | 2011-11-12 | 2013-05-16 | Wei Wu | Method of electricity leakage detection and prevention of electrical equipment's outer surface and system thereof |
| CN107727987A (en) * | 2017-09-26 | 2018-02-23 | 捍防（苏州）实业有限公司 | A kind of Electrical Safety analysis method |
| CN110058105A (en) * | 2018-01-19 | 2019-07-26 | 宁波方太厨具有限公司 | A kind of detection circuit and its detection method of leak current fault |
| CN209446706U (en) * | 2019-01-16 | 2019-09-27 | 苏州富晟一杭汽车部件有限公司 | Charging gun 3-phase plug protective wire does not connect detection circuit |
| CN210038128U (en) * | 2019-05-14 | 2020-02-07 | 华立科技股份有限公司 | Detection circuit for identifying reverse connection of fire and zero lines and PCB |
| CN112666488A (en) * | 2019-09-30 | 2021-04-16 | 江苏万帮德和新能源科技股份有限公司 | Ground fault detection method and device |
| CN212321817U (en) * | 2020-01-02 | 2021-01-08 | 青岛鼎信通讯股份有限公司 | Circuit for detecting positive and negative connection of zero and live wires |
| CN212749196U (en) * | 2020-07-03 | 2021-03-19 | 广西诚新慧创科技有限公司 | Input/output ground wire detection circuit |
| CN112068040A (en) * | 2020-09-14 | 2020-12-11 | 珠海格力电器股份有限公司 | Connection detection circuit and method and electric equipment |
| CN112946535A (en) * | 2021-02-25 | 2021-06-11 | 广汽丰田汽车有限公司 | Power supply socket abnormity detection device, power consumption protection device and charging protection device |
Non-Patent Citations (1)
| Title |
|---|
| 具有区分空调室外机火线零线功能的微处理器;吴海明;《IT时代周刊》;20141231;全文 * |
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