CN108224790A - Earth wire charged testing device and a kind of electric heater - Google Patents
Earth wire charged testing device and a kind of electric heater Download PDFInfo
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- CN108224790A CN108224790A CN201810299444.8A CN201810299444A CN108224790A CN 108224790 A CN108224790 A CN 108224790A CN 201810299444 A CN201810299444 A CN 201810299444A CN 108224790 A CN108224790 A CN 108224790A
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- 238000001514 detection method Methods 0.000 claims abstract description 133
- 230000005611 electricity Effects 0.000 claims abstract description 46
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- 230000003287 optical effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000008878 coupling Effects 0.000 description 5
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- 238000005859 coupling reaction Methods 0.000 description 5
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- 208000027418 Wounds and injury Diseases 0.000 description 4
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- 208000014674 injury Diseases 0.000 description 4
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- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
Abstract
The invention discloses earth wire charged testing devices, and access circuit, ground wire electrified detection access circuit and comprehensive detection circuit are detected including reference ground；Reference ground detection access circuit is connect with ground wire electrified detection access circuit；Reference ground detection access circuit and ground wire electrified detection access circuit are connect respectively with comprehensive detection circuit；Whether reference ground detection access circuit detection reference ground is grounded as required, detects whether the ground wire of electricity measurer to be checked being connect with earth wire charged testing device charges.The invention also discloses a kind of electric heaters using above-mentioned earth wire charged testing device.Whether the ground wire that electricity measurer to be checked can be detected in real time charges, and when detecting electrification, sends out alarm signal, people's electric appliance to be reminded to charge.
Description
Technical field
The present invention relates to electrical safety technical fields, and in particular to earth wire charged testing device and a kind of electric heater.
Background technology
According to concerned countries safety standard, I electric appliances in China are required to connection ground wire, when ground wire is connect really with the earth
When good, electric appliance is safe.It is but especially old small at some since China's generally existing electric wiring lays non-standard phenomena
The reversed situation of area and rural area, earth-free line or imperfect earth, zero firewire is extremely common.When earth-free line is using the electric appliances,
Once electric appliance itself leaks electricity, when people touches electric appliance, electric shock is directly resulted in.If imperfect earth, when electrical leakage, with ground wire
The shell of connection will form higher ground connection pressure drop and form danger；More it is a risk that in the case of imperfect earth, a room
The ground wire of electric appliance links together or even the ground wire of more family electric appliances all links together, as long as a wherein electrical leakage, entirely
Ground net can all charge.To avoid above-mentioned dangerous generation, some electric appliance factories, if electric heater factory would generally be product
Increase leakage protecting plug or anti-electricity wall+contact with alarm of charged ground wire device.
Leakage protecting plug belongs to " passive-type " protective device, i.e., first generating leakage current, (such as people touches electric appliance, electric leakage electricity
Flow through human body and flow into the earth) and reach certain value (value is the breaking current of protective device), device just will disconnect.Because of different people
The difference of electric current is resistant to, also different to the injury of human body, accordingly, there exist by the electric current injury risk less than the value.
Anti-electricity wall+contact with alarm of charged ground wire device scheme, current warning device mainly have following two forms：1st, with zero curve
For reference, when ground wire electrification, sends out alarm.But there are the hidden danger that zero firewire cannot be detected, be alarmed after reversed；2nd, it is beaten on wall
Enter bolt wiring, using wall as reference, the warning devices such as neon bulb are connected between the ground wire of electric appliance at it.But exist because neglecting not
Connection wall ground wire or the improper hidden danger for causing to detect, alarm of connection.
Invention content
In view of the deficiencies of the prior art, the embodiment of the present invention provides a kind of earth wire charged testing device and a kind of electric hot water
Device.Whether the ground wire that earth wire charged testing device provided by the invention can detect electricity measurer to be checked in real time charges, and is detecting
To during electrification, alarm signal is sent out, people's electric appliance to be reminded to charge.The electric heater is filled with above-mentioned ground wire electrified detection
It puts, alarm signal can be sent out in electric heater ground wire electrification, people to be reminded not use the electric heater.
Earth wire charged testing device provided in an embodiment of the present invention detects access circuit, ground wire electrification including reference ground
Detection access circuit and comprehensive detection circuit；Reference ground detection access circuit is connect with ground wire electrified detection access circuit；Ginseng
It examines ground wire detection access circuit and ground wire electrified detection access circuit is connect respectively with comprehensive detection circuit；Reference ground detection connects
Enter circuit and include reference ground, reference ground is the ground wire of coarse ground connection, it is only necessary to be connected to wall etc. by such as expansion bolt
Mode carries out below 3.5M Ω with the earth and is grounded.Whether reference ground detection access circuit detection reference ground is grounded as required,
And detection signal is sent to comprehensive detection circuit；Ground wire electrified detection accesses circuit and detects access circuit connection with reference ground
Reference ground be reference, detect whether the ground wire of electricity measurer to be checked that connect with earth wire charged testing device charges, and will examine
It surveys signal and is sent to comprehensive detection circuit, comprehensive detection circuit is used to detect that reference ground is not grounded or treats as required
When detecting the ground wire electrification of electric appliance, alarm signal is sent out.
Earth wire charged testing device provided by the invention sets reference ground, detects access electricity by reference to ground wire first
Detect the connection of reference ground in road, it can be ensured that reference ground is grounded as required, then again using reference ground as reference, in real time
Whether the ground wire for detecting electricity measurer to be checked charges.In the case where detecting ground wire electrification, alarm signal is sent out in time, to remind
People's electric appliance charges, and avoids because of electrical leakage or injury during other electrical leakages to people when ground wire grounded bad.
Preferably, reference ground detection access circuit includes power input sub-circuit, the first photo-coupler and reference ground,
Zero firewire of power input sub-circuit power input external power supply, power input sub-circuit power output end connect the first optocoupler
The anode of clutch light emitting diode, the cathode connection reference ground of the first photo-coupler light emitting diode, comprehensive detection circuit connect
Connect the coupled end of the first photo-coupler.Power input sub-circuit is used for external power supply, will with whether offer detection reference ground presses
Seek the detection electric current of ground connection.
Preferably, for using alternating current as power supply, power input in reference ground of the invention detection access circuit is electric
Road includes the first connection sub-circuit and the second connection sub-circuit；
First connection sub-circuit includes first electrode connecting pin, first resistor and the first diode, first electrode connecting pin
Can external electricity measurer to be checked firewire or zero curve, first electrode connection first resistor one end, the other end connection of first resistor
The anode of first diode；
Second connection sub-circuit includes second electrode connecting pin, second resistance and the second diode, second electrode connecting pin
Can external electricity measurer to be checked firewire or zero curve, second electrode connection second resistance one end, the other end connection of second resistance
The anode of second diode；
The cathode of first diode connects the cathode of second diode, and connects first photo-coupler simultaneously
The anode of light emitting diode.
First connection sub-circuit and the second connection sub-circuit all include resistance and diode, and wherein resistance mainly plays circuit
The effect of protection, diode have the function of circuit rectifies.When the first connection sub-circuit connection firewire, the second connection sub-circuit connects
When connecing zero curve, play connection power supply is the first connection sub-circuit, and the second connection sub-circuit does not have electric current to flow through.Similarly, when
First connection sub-circuit connection zero curve, when the second connection sub-circuit connects firewire, play connection power supply is the second connexon
Circuit, the first connection sub-circuit do not have electric current to flow through.By the way that two circuit structures is set all to carry the connection sub-circuit of diode,
It can not have to distinguish zero firewire connection, also avoid reversed to circuit there are zero firewire in some old residential communities, rural area
The trouble of connection.As long as any sub-circuit of connection all the way is connected firewire, then detection can be provided by always having connection sub-circuit all the way
Electric current.
Preferably, ground wire electrified detection access circuit includes ground wire connection sub-circuit, the second photo-coupler and reference ground；
Ground wire connexon circuit on one side connects the ground wire for treating electricity measurer, and the other end is connecting the second photo-coupler light emitting diode just
Pole, reference ground connect the cathode of the second photo-coupler light emitting diode, and comprehensive detection circuit connects second photo-coupler
Coupled end.Ground wire connection sub-circuit is connected to the ground wire for treating electricity measurer, if treating the ground wire electrification of electricity measurer, ground wire connection
Sub-circuit end forms high potential, and reference ground line end forms zero potential, and electric current flows through the second photo-coupler from ground wire connection sub-circuit
And flow into the earth through reference ground.Second photo-coupler generates signal and is sent to comprehensive detection circuit, is sent out by comprehensive detection circuit
Go out alarm signal, to remind the ground contact of electricity measurer to be checked bad, the shell of electric appliance is with electricity.In order to avoid the electric appliance using electrification
When human body is damaged.
Preferably, ground wire connection sub-circuit provides a kind of simple and practical connection circuit.Including ground wire incoming end, third
Resistance and third diode, the ground wire of the external electricity measurer to be checked of ground wire incoming end input terminal, ground line output terminal connection 3rd resistor
One end, the anode of the other end connection third diode of 3rd resistor, the cathode of third diode connect the second photo-coupler hair
The anode of optical diode.
Preferably, alarm is further included, comprehensive detection circuit includes first input end, the second input terminal and output terminal, the
One input terminal connects the coupled end of the first photo-coupler, and the second input terminal connects the coupled end of the second photo-coupler, and output terminal connects
Connect abnormal signal display module.Abnormal signal display module includes alarm, and alarm preferably uses acoustic-optic alarm.
Preferably, the first photo-coupler and the second photo-coupler are photistor type photo-coupler, further include biasing
Power connector end, bias supply connecting pin connect the first photistor type photo-coupler and the second photistor type light respectively
The collector of coupler, the first input end of comprehensive detection circuit connect the radio pole of the first photistor type photo-coupler,
Second input terminal connects the radio pole of the second photistor type photo-coupler.
The embodiment of the present invention also provides a kind of electric heater, is filled including water heater body and ground wire electrified detection as described above
It puts, the ground wire of ground wire electrified detection access circuit connection electric heater, ground wire electrified detection access circuit, which detects the ground wire, is
No electrification.
The embodiment of the present invention further provides for a kind of preferred electric heater, including water heater body and ground wire as described above
Measuring device with electricity, wherein, the firewire of the first connection sub-circuit connection electric heater, the second connection sub-circuit connects the electric heating
The zero curve of hydrophone, alternatively, the zero curve of the first connection sub-circuit connection electric heater, the second connection sub-circuit connect the electric hot water
The firewire of device, the ground wire of ground wire electrified detection access circuit connection electric heater, ground wire electrified detection are accessed described in circuit detection
Whether ground wire charges.
Description of the drawings
Fig. 1 is the earth wire charged testing device structure diagram that the embodiment of the present invention 1 provides；
Fig. 2 is the earth wire charged testing device specific embodiment structure diagram that the embodiment of the present invention 1 provides；
Fig. 3 is the earth wire charged testing device preferred embodiment structure diagram that the embodiment of the present invention 1 provides；
Fig. 4 is the electric heater structure diagram that the embodiment of the present invention 2 provides.
10th, reference ground detection access circuit；20th, ground wire electrified detection access circuit；30th, comprehensive detection circuit；40th, sound
Light warning device；50th, electric heater main body circuit；L, firewire；N, zero curve；PE, ground wire incoming end；E, reference ground；R1, first
Resistance；R2, second resistance；R3,3rd resistor；D1, the first diode；D2, the second diode；D3, third diode；U1,
One photo-coupler；U2, the second photo-coupler；V, bias supply connecting pin.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1：
It is earth wire charged testing device structure diagram provided in an embodiment of the present invention referring to Fig. 1；
The earth wire charged testing device that first aspect of the embodiment of the present invention provides detects access circuit including reference ground
10th, ground wire electrified detection access circuit 20 and comprehensive detection circuit 30；Reference ground detection access circuit 10 and ground strip electric-examination
Access circuit 20 is surveyed to connect；Reference ground detection access circuit 10 and ground wire electrified detection access circuit 20 respectively with comprehensive detection
Circuit 30 connects；Reference ground detection access circuit 10 includes reference ground E, the reference ground detection access detection reference of circuit 10
Ground wire E earth wire charged testing devices are grounded as required, and detection signal is sent to comprehensive detection circuit 30；Ground wire electrified detection
It accesses circuit 20 and the reference ground E for accessing the connection of circuit 10 is detected using reference ground as reference, detection and ground wire electrified detection dress
Whether the ground wire for putting the electricity measurer to be checked of connection charges, and detection signal is sent to comprehensive detection circuit 30, comprehensive detection electricity
Road 30 is used to, when detecting reference ground without the ground wire electrification of ground connection or electricity measurer to be checked as required, send out alarm letter
Number.
Earth wire charged testing device provided by the invention sets reference ground E, detects access electricity by reference to ground wire first
Detect the connection of reference ground E in road 10, it can be ensured that reference ground E is grounded as required, then again using reference ground E as ginseng
It examines, whether the ground wire for detecting electricity measurer to be checked in real time charges.In the case where detecting ground wire electrification, alarm signal is sent out in time
Number, people's electric appliance to be reminded to charge, avoid because when ground wire grounded bad electrical leakage or during other electrical leakages to people's
Injury.
Reference ground detection access circuit 10 includes power input sub-circuit, the first photo-coupler U1 and reference ground E, electricity
Source inputs zero firewire of sub-circuit power input external power supply, and power input sub-circuit power output end connects the first optical coupling
The light emitting diode anode of device U1, the light emitting diode cathode connection reference ground E of the first photo-coupler U1, comprehensive detection circuit
The coupled end of 30 the first photo-coupler U1 of connection.Power input sub-circuit is used for external power supply, to provide detection reference ground
The detection electric current whether line E is grounded as required.
Earth wire charged testing device provided by the invention, is generally located on household electrical appliance, can be combined into household electrical appliance
One forms the household electrical appliance with earth wire charged testing device, such as electric heater, washing machine, refrigerator.Power supply can
To draw materials nearby, i.e., power supply preferably uses consistent with the power supply of household electrical appliance, using alternating current as power supply.
Earth wire charged testing device provided by the invention provides a kind of using circuit knot of the alternating current as power supply
Structure, as shown in Figure 2.
The present invention reference ground detection access circuit 10 in power input sub-circuit include first connection sub-circuit and
Second connection sub-circuit；
First connection sub-circuit includes first electrode connecting pin, first resistor R1 and the first diode D1, and first electrode connects
Connect end can the firewire L of external electricity measurer to be checked or zero curve N, the one of the other end connection first resistor R1 of first electrode connecting pin
End, the other end of first resistor R1 connect the anode of the first diode D1；
Second connection sub-circuit includes second electrode connecting pin, second resistance R2 and the second diode D2, and second electrode connects
Connect end can the firewire L of external electricity measurer to be checked or zero curve N, the one of second electrode connecting pin other end connection second resistance R2
End, the other end of second resistance R2 connect the anode of the second diode D2；
The cathode of first diode D1 connects the cathode of the second diode D2, and connects first optical coupling simultaneously
The light emitting diode cathode of device U1.
First connection sub-circuit and the second connection sub-circuit all include resistance and diode, and wherein resistance mainly plays circuit
The effect of protection, diode have the function of circuit rectifies.When the first connection sub-circuit connection firewire L, the second connection sub-circuit
When connecting zero curve N, play connection power supply is the first connection sub-circuit, and the second connection sub-circuit does not have electric current to flow through.Similarly,
As the first connection sub-circuit connection zero curve N, the second connection sub-circuit connection firewire L, play connection power supply is the second company
Sub-circuit is connect, the first connection sub-circuit does not have electric current to flow through.By the way that two circuit structures is set all to carry the connexon of diode
Circuit can not have to distinguish zero firewire connection, and it is reversed right there are zero firewire in some old residential communities, rural area to also avoid
The trouble of circuit connection.As long as any sub-circuit of connection all the way is connected firewire L, then always having connection sub-circuit all the way can provide
Detect electric current.First connection sub-circuit and the second connection sub-circuit could be provided as the same circuit structure, i.e. first resistor R1
Specification is used using the identical resistance of specification resistance value, the first diode D1 and the second diode D2 completely completely with second resistance R2
Diode, approximate circuit structure can also be used.As first resistor R1 and second resistance R2 is approximate using specification resistance value
Resistance, the first diode D1 and the second diode D2 use the diode of specification or the approximate diode of specification completely.This hair
Bright embodiment is preferably using the identical circuit structure of structure.
Ground wire electrified detection access circuit 20 includes ground wire connection sub-circuit, the second photo-coupler U2 and reference ground E；Ground
Line connexon circuit on one side connects the ground wire for treating electricity measurer, and the other end is connecting the light emitting diode of the second photo-coupler U2 just
Pole, the light emitting diode cathode of reference ground E the second photo-couplers of connection U2, comprehensive detection circuit 30 connect second optocoupler
The coupled end of clutch U2.Ground wire connection sub-circuit is connected to the ground wire for treating electricity measurer, if treating the ground wire electrification of electricity measurer,
Line connexon circuit end forms high potential, and reference ground E ends form zero potential, and electric current flows through the second light from ground wire connection sub-circuit
Coupler U2 simultaneously flows into the earth through reference ground E.Second photo-coupler U2 generates signal and is sent to comprehensive detection circuit 30, by comprehensive
It closes detection circuit 30 and sends out alarm signal, to remind the ground contact of electricity measurer to be checked bad, the shell of electric appliance is with electricity.In order to avoid
Using electrification electric appliance when human body is damaged.
In a kind of simple and practical connection circuit of ground wire connection sub-circuit.Including ground wire incoming end PE, 3rd resistor R3
With third diode D3, the ground wire of the external electricity measurer to be checked of ground wire incoming end PE input terminals, ground wire access output terminal connection third
Resistance R3 one end, the anode of the other end connection third diode D3 of 3rd resistor R3, the cathode connection of third diode D3 the
The light emitting diode anode of two photo-coupler U2.
As shown in figure 3, the embodiment of the present invention also provides a kind of preferred embodiment.Comprehensive detection circuit 30 includes first
Input terminal, the second input terminal and output terminal, first input end connect the coupled end of the first photo-coupler U1, the connection of the second input terminal
The coupled end of second photo-coupler U2, output terminal connection abnormal signal display module.In a kind of realization method, comprehensive detection circuit
Whether 30 detection first input ends first have signal, if without signal, illustrate earth wire charged testing device without as required
Ground connection, comprehensive detection circuit 30 send out alarm signal by abnormal signal display module, can such as make a sound signal, can also
Send out optical signal.When comprehensive detection circuit 30 detects that first input end has signal, illustrate that reference ground E is grounded as required, this
When detect whether the second incoming end has signal, if not provided, illustrating that the ground wire of electricity measurer to be checked does not charge, do not send out any police
Show signal, if detecting that the second input terminal has signal, illustrate the ground wire electrification of electricity measurer to be checked, comprehensive detection circuit 30 passes through
Abnormal signal display module sends out alarm signal, can such as make a sound signal, can also send out optical signal.Abnormal signal is shown
Module can set different display light to show the signal of the signal of first input end and the second input terminal, such as can be first
Input terminal does not have the light that yellow is sent out during signal, and signal an alert when first input end has detected signal, sends out green
Light prompts reference ground access normal.Simultaneously when the second input terminal does not have signal, any light is not sent out, in the second input
When there is signal at end, red danger alarm signal is sent out.Abnormal signal display module can include alarm, and alarm preferably uses
Acoustic-optic alarm 40.Acoustic-optic alarm 40 not only signal an alert or danger signal, can also be simultaneously emitted by difference
Audio warning, to achieve the purpose that prompting.Such as dangerous alarm song is sent out by sending screak.
Preferably, the first photo-coupler U1 and the second photo-coupler U2 is photistor type photo-coupler, the first light
The completely the same photo-coupler of specification may be used in coupler U1 and the second photo-coupler U2, can also use the approximate light of specification
Coupler.Bias supply connecting pin V is further included, bias supply connecting pin V connects the first photistor type photo-coupler respectively
With the collector of the second photistor type photo-coupler, the first input end of comprehensive detection circuit 30 connects the first photosensitive crystal
The radio pole of cast photo-coupler, the second input terminal connect the radio pole of the second photistor type photo-coupler.
Embodiment 2：
Electric heater structural representation shown in Figure 4, that the embodiment of the present invention 2 provides using earth wire charged testing device
Figure.
The embodiment of the present invention also provides a kind of electric heater, is filled including water heater body and ground wire electrified detection as described above
It puts, electric heater ontology built-in electric heating water machine body circuit 50, electric heater main body circuit 50 connects firewire L, the zero curve N of alternating current
And ground wire, heating wire is further included in electric heater main body circuit 50, heating unit is provided.Ground wire electrified detection access circuit connection
The ground wire of electric heater, ground wire electrified detection access circuit detect whether the ground wire charges.
As shown in figure 4, electric heater provided in this embodiment, the reference ground detection access electricity of earth wire charged testing device
Power input sub-circuit in road 10 includes the first connection sub-circuit and the second connection sub-circuit；
First connection sub-circuit includes first electrode connecting pin, first resistor R1 and the first diode D1, and first electrode connects
Connect firewire L or zero curve N that end connects electricity measurer to be checked, first electrode connecting pin other end connection first resistor R1, the first electricity
Hinder the anode of R1 the first diodes of connection D1；
Second connection sub-circuit includes second electrode connecting pin, second resistance R2 and the second diode D2, and second electrode connects
Meet firewire L or zero curve N that end connects electricity measurer to be checked, second electrode connecting pin connection second resistance R2, second resistance R2 company
Connect the anode of the second diode D2；
The cathode of first diode D1 connects the cathode of the second diode D2, and connects first optical coupling simultaneously
The light emitting diode anode of device U1.
First connection sub-circuit and the second connection sub-circuit all include resistance and diode, and wherein resistance mainly plays circuit
The effect of protection, diode have the function of circuit rectifies.When the first connection sub-circuit connection firewire L, the second connection sub-circuit
When connecting zero curve N, play connection power supply is the first connection sub-circuit, and the second connection sub-circuit does not have electric current to flow through.Similarly,
As the first connection sub-circuit connection zero curve N, the second connection sub-circuit connection firewire L, play connection power supply is the second company
Sub-circuit is connect, the first connection sub-circuit does not have electric current to flow through.By the way that two circuit structures is set all to carry the connexon of diode
Circuit can not have to distinguish zero firewire connection, and it is reversed right there are zero firewire in some old residential communities, rural area to also avoid
The trouble of circuit connection.As long as any sub-circuit of connection all the way is connected firewire L, then always having connection sub-circuit all the way can provide
Detect electric current.First connection sub-circuit and the second connection sub-circuit could be provided as the same circuit structure, i.e. first resistor R1
Specification is used using the identical resistance of specification resistance value, the first diode D1 and the second diode D2 completely completely with second resistance R2
Diode, approximate circuit structure can also be used.As first resistor R1 and second resistance R2 are near completely using specification resistance value
As resistance, the first diode D1 and the second diode D2 use the diode of specification or the approximate diode of specification completely.
The embodiment of the present invention is preferably using the identical circuit structure of structure.
Ground wire electrified detection circuit workflow provided in an embodiment of the present invention：In embodiments of the present invention, the first connection
Sub-circuit is all made of, and all connect with photo-coupler as the circuit structure of the second connection sub-circuit resistance and diode,
Resistance is consistent with diode parameters, that is to say, that the first connection sub-circuit can connect the zero curve of electric heater, can also connect
The firewire of electric heater, because the first connection sub-circuit can meet user in nothing as the structure of the second connection sub-circuit
Method identification electric heater zero firewire in the case of, still can normal use earth wire charged testing device provided by the invention,
And identical detection can be played the role of；
So, when the zero curve of the first connection sub-circuit connection electric heater, the second connection sub-circuit connects electric heater
During firewire, the zero curve of electric heater connect identical current-limiting resistance and rectification circuit with firewire respectively, when reference ground (wall
Line) when normally connecting or be grounded with wall, the electric current of electric heater flows into earth wire charged testing device from the firewire of electric heater,
By current limliting decompression second resistance R2, rectification the second diode D2 and the first photo-coupler U1 after, due to the second connexon
Circuit connect inflow the earth by the first photo-coupler U1 with reference ground E, and the loop current of formation causes the first photo-coupler
The light emitting diode of U1 is lighted, and comprehensive detection circuit 30 detects whether first input end has signal by the first photo-coupler U1,
Reference ground normally accesses and causes have loop current to pass through the first photo-coupler, and the first light if lumination of light emitting diode
The inductor of coupler can export corresponding electric signal, from the of the inductive output end of the first coupler and comprehensive detection circuit 30
One input terminal is to comprehensive detection circuit 30 so that comprehensive detection circuit 30 is detected judgement.
The ground wire of electric heater and the ground wire incoming end of earth wire charged testing device connect, ground wire electrified detection access circuit
Including current limliting decompression 3rd resistor R3, rectification third diode D3 and the second photo-coupler U2；When the ground wire of electric heater is abnormal
During electrification, the electric current of ground wire is depressured 3rd resistor R3, rectification third diode D3 and the second photo-coupler U2 by current limliting, due to
Ground wire incoming end PE is connect by the second photo-coupler with reference ground E, therefore electric current flows into the earth by reference to ground wire, is formed
Circuit light the light emitting diode of the second photo-coupler U2, the inductor of the second photo-coupler U2 can export corresponding telecommunications
Number, electric signal is input to comprehensive detection circuit 30 by the second input terminal of the second photo-coupler and comprehensive detection circuit 30, makes
Comprehensive detection circuit 30 is obtained to be detected and judge according to the electric signal from the first photo-coupler and the inflow of the second photo-coupler；
When earth wire charged testing device first connection sub-circuit, second connection sub-circuit and ground wire incoming end PE respectively with
When zero curve, firewire and the ground wire of electric heater normally connect, comprehensive detection circuit is according to from the first photo-coupler U1 and the second light
The electric signal that coupler U2 is flowed into carries out whether comprehensive descision sends out alarm signal to warning circuit：
(1) when the first photo-coupler U1 does not have electric signal input detecting circuit, then the first photo-coupler U1 does not have circuit
Electric current passes through, and the light emitting diode of the first photo-coupler U1 does not shine, and the first photo-coupler U1 does not have the comprehensive inspection of electric signal input
Slowdown monitoring circuit 30, at this time comprehensive detection circuit 30 by the connecting line output alarm signal with warning circuit to warning circuit, alarm
Circuit sends out alarm according to alarm signal, and user is prompted to be grounded reference ground as required；
(2) when the first photo-coupler U1 has electric signal input detecting circuit, then the light-emitting diodes of the first photo-coupler U1
Pipe normal luminous, the first input end of comprehensive detection circuit 30 have signal input, and comprehensive detection circuit 30 will be according to the second optocoupler
The electric signal of clutch input judges whether the ground wire of electric heater charges extremely；Under normal circumstances the ground wire of electric heater without
Electricity does not shine without loop current by the light emitting diode of the second photo-coupler U2, the second photo-coupler U2, the second optocoupler
Clutch U2 does not export electric signal to comprehensive detection circuit 30, then when comprehensive detection circuit 30 is not detected from the second optical coupling
During the electric signal of device U2 inputs, then judge that the ground wire of electric heater is not charged, the not output alarm signal of comprehensive detection circuit 30；
(3) when comprehensive detection circuit 30 detects the electric signal of the second photo-coupler U2 outputs, then judge electric heater
Ground wire charge extremely, comprehensive detection circuit 30 by the connecting line output alarm signal with warning circuit to warning circuit, report
Alert circuit sends out alarm according to the alarm signal received, the ground wire of user's electric heater is prompted to charge extremely, in exception
Working condition, so that user stops using the electric heater.
When the firewire of the first connection sub-circuit connection electric heater, and the second connection sub-circuit connects the zero curve of electric heater
When, due to first resistor R1, rectification first diode D1 and the of the electric current by current limliting decompression of the zero line output of electric heater
One photo-coupler U1, and first resistor R1 and the first diode D1 the parameter phase with second resistance R2 and the second diode D2 respectively
Together, therefore the electric current of the zero line output of electric heater is by the same current limliting decompression and rectified action, and passes through the first optical coupling
Device U1 and be input in comprehensive detection circuit 30 by the inductor of the first photo-coupler U1, operation principle and the course of work are very
To being that working result is consistent when all normally connecting the zero curve of electric heater with the first connection sub-circuit, therefore repeats no more.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. earth wire charged testing device, which is characterized in that detect access circuit, ground wire electrified detection access electricity including reference ground
Road and comprehensive detection circuit；The reference ground detection access circuit is connect with ground wire electrified detection access circuit；It is described
Reference ground detection access circuit and ground wire electrified detection access circuit are connect respectively with the comprehensive detection circuit；It is described
Reference ground detection accesses circuit and includes reference ground, and whether the reference ground detection access circuit detection reference ground presses will
Ground connection is asked, and detection signal is sent to comprehensive detection circuit；The ground wire electrified detection accesses circuit with the reference ground
The reference ground of access circuit connection is detected to refer to, the electricity measurer to be checked that detection is connect with the earth wire charged testing device
Whether ground wire charges, and detection signal is sent to comprehensive detection circuit, and the comprehensive detection circuit is used to detect reference
When ground wire is without the ground wire electrification of ground connection or the electricity measurer to be checked as required, alarm signal is sent out.
2. earth wire charged testing device as described in claim 1, which is characterized in that the reference ground detection access circuit packet
Power input sub-circuit, the first photo-coupler and the reference ground are included, the power input sub-circuit power input is external
Zero firewire of power supply, the power input sub-circuit power output end are connecting the first photo-coupler light emitting diode just
Pole, the cathode of the first photo-coupler light emitting diode connect the reference ground, described in the comprehensive detection circuit connection
The coupled end of first photo-coupler.
3. earth wire charged testing device as claimed in claim 2, which is characterized in that the power input sub-circuit includes first
Connect sub-circuit and the second connection sub-circuit；
The first connection sub-circuit includes first electrode connecting pin, first resistor and the first diode, and the first electrode connects
Connect end can external electricity measurer to be checked firewire or zero curve, the first electrode connects described first resistor one end, described first
The other end of resistance connects the anode of first diode；
The second connection sub-circuit includes second electrode connecting pin, second resistance and the second diode, and the second electrode connects
Connect end can external electricity measurer to be checked firewire or zero curve, the second electrode connects described second resistance one end, described second
The other end of resistance connects the anode of second diode；
The cathode of first diode connects the cathode of second diode, and connects the first photo-coupler hair simultaneously
The anode of optical diode.
4. earth wire charged testing device as claimed in claim 3, which is characterized in that the ground wire electrified detection accesses circuit packet
Include ground wire connection sub-circuit, the second photo-coupler and the reference ground；The ground wire connexon circuit on one side connects electricity to be measured
The ground wire of device, the other end connect the anode of the second photo-coupler light emitting diode, and the reference ground connects the second optocoupler
The cathode of clutch light emitting diode, the comprehensive detection circuit connect the coupled end of second photo-coupler.
5. earth wire charged testing device as claimed in claim 4, which is characterized in that the ground wire connection sub-circuit includes ground wire
Incoming end, 3rd resistor and third diode, the ground wire of the external electricity measurer to be checked of ground wire incoming end, the ground wire incoming end
Connecting described 3rd resistor one end, the other end of the 3rd resistor connects the anode of the third diode, and the described 3rd 2
The cathode of pole pipe connects the anode of the light emitting diode of second photo-coupler.
6. the earth wire charged testing device as described in claim 1 to 5 is any, which is characterized in that further include abnormal signal and show
Module, the comprehensive detection circuit include first input end, the second input terminal and output terminal, described in first input end connection
The coupled end of first photo-coupler, second input terminal connect the coupled end of second photo-coupler, and the output terminal connects
Connect the abnormal signal display module.
7. earth wire charged testing device as claimed in claim 6, which is characterized in that the abnormal signal display module includes report
Alert device, the alarm are acoustic-optic alarm.
8. earth wire charged testing device as claimed in claim 6, which is characterized in that first photo-coupler and the second optocoupler
Clutch is photistor type photo-coupler, further includes bias supply connecting pin, and the bias supply connecting pin connects respectively
The collector of the first photistor type photo-coupler and the second photistor type photo-coupler, the comprehensive detection electricity
The radio pole of first input end connection the first photistor type photo-coupler on road, the second of the comprehensive detection circuit
Input terminal connects the radio pole of the second photistor type photo-coupler.
9. a kind of electric heater, including water heater body and claims 1 or 2 or 6 to 8 it is any as described in ground wire electrified detection
Device, the ground wire of the ground wire electrified detection access circuit connection electric heater, the ground wire electrified detection access circuit detection
Whether the ground wire charges.
10. a kind of electric heater, the earth wire charged testing device including water heater body and as described in claim 3 to 5 is any,
The first connection sub-circuit connects the firewire of the electric heater, and the second connection sub-circuit connects the electric heater
Zero curve, alternatively, the first connection sub-circuit connects the zero curve of the electric heater, described second connects described in sub-circuit connection
The firewire of electric heater, the ground wire of the ground wire electrified detection access circuit connection electric heater, the ground wire electrified detection connect
Enter circuit and detect whether the ground wire charges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810299444.8A CN108224790B (en) | 2018-04-04 | Ground wire live detection device and electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810299444.8A CN108224790B (en) | 2018-04-04 | Ground wire live detection device and electric water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108224790A true CN108224790A (en) | 2018-06-29 |
| CN108224790B CN108224790B (en) | 2024-04-30 |
Family
ID=
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| WO2020118965A1 (en) * | 2018-12-14 | 2020-06-18 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater electric leakage detection method and electric water heater |
| CN113866523A (en) * | 2020-06-30 | 2021-12-31 | 芜湖美的厨卫电器制造有限公司 | Electrical phase detection device and method for household appliance and household appliance |
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