CN206697914U - Earth leakage protective device, electrical connection equipment and electrical equipment - Google Patents
Earth leakage protective device, electrical connection equipment and electrical equipment Download PDFInfo
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- CN206697914U CN206697914U CN201720355793.8U CN201720355793U CN206697914U CN 206697914 U CN206697914 U CN 206697914U CN 201720355793 U CN201720355793 U CN 201720355793U CN 206697914 U CN206697914 U CN 206697914U
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- Prior art keywords
- temperature
- protective device
- current
- earth leakage
- detection
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Abstract
The utility model discloses earth leakage protective device, electrical connection equipment and electrical equipment.Earth leakage protective device includes switch element, and it is used for electrically connected between control signal and output end；Detection of electrical leakage unit, it includes more current-carrying conductors and at least an electric-examination survey line, and wherein electric-examination survey line whether there is leakage current for detecting an at least current-carrying conductor；Temperature monitoring unit, it includes being arranged at least one resistive temperature-sensing element at detection, and at least one temperature-sensing element is coupled to switch element via electric-examination survey line, and temperature monitoring unit is according to the temperature at detection come controlling switch unit.The utility model in earth leakage protective device by adding temperature observation circuit so that electrical equipment can avoid working long hours under the high temperature conditions, greatly improve the security of circuit.
Description
Technical field
It the utility model is related to domestic circuit field, more particularly to a kind of open circuit that overheat protector is provided for household electrical appliance
Device.
Background technology
With becoming increasingly popular for household electrical appliance, people increasingly pay attention to the safe to use of household electrical appliance, at present, Hen Duojia
Electrical appliance all starts to be equipped with Protector for using electricity, such as leakage protecting plug, but still following defect be present, when in household electrical appliance
The parts quality in portion is bad, aging or when breaking down, and temperature constantly raises, and finally causes fire, cause personal injury or
Serious property loss.At present, some technical schemes realize temperature monitoring by installing temperature sensitive sheet metal in household electrical appliance, still
Temperature sensitive sheet metal cost is high, and is inconvenient to install.
Therefore, a kind of convenient installation, the economic benefit significantly earth leakage protective device with overheat protector function are needed badly.
Utility model content
In view of the above-mentioned problems, entered the utility model proposes a kind of by the earth leakage protective device with temperature observation circuit
And lift Product Safety.
On the one hand the utility model proposes a kind of earth leakage protective device, it includes：Switch element, it is used for control input
It is electrically connected between end and output end；Detection of electrical leakage unit, it includes more current-carrying conductors and at least an electric-examination survey line, wherein
The electric-examination survey line is used for a detection at least current-carrying conductor and whether there is leakage current；Temperature monitoring unit, it includes setting
At least one resistive temperature-sensing element at detection, at least one temperature-sensing element are coupled to described via the electric-examination survey line
Switch element, the temperature monitoring unit control the switch element according to the temperature at the detection.
In one embodiment, the temperature monitoring unit also includes tie point, one end coupling of the tie point
A current-carrying conductor being connected in the more current-carrying conductors, the other end are coupled to described at least one resistive via the electric-examination survey line
Temperature-sensing element, and at least one resistive temperature-sensing element is coupled to another current-carrying conductor in the more current-carrying conductors.
In one embodiment, at least one resistive temperature-sensing element is thermo-sensitive resistor.
In one embodiment, when the temperature at the detection is more than or equal to temperature threshold, the thermo-sensitive resistor
Resistance, which will increase or be reduced into, enables to the switch element to disconnect the electric power company between the input and the output end
Connect.
In one embodiment, the tie point includes being coupled to the of the electric-examination survey line via the first diode
One resistance, and at least one resistive temperature-sensing element is coupled in the more current-carrying conductors via at least one diode
Another current-carrying conductor.
In one embodiment, at least one resistive temperature-sensing element is coupled to the current-carrying that is identical or differing
Line.
In one embodiment, the temperature monitoring unit is coupled to the control of the switch element in the switch element
End, it is electrically connected between the input and the output end to control.
In one embodiment, the switch element is controllable silicon, and the controllable silicon is according to the detection of electrical leakage
Drive signal caused by unit and/or the temperature monitoring unit and turn on.
On the other hand the utility model also proposed a kind of electrical connection equipment including earth leakage protective device, including：It is defeated
Incoming interface, for being coupled to power supply at input side；Output interface, for being coupled to electrical equipment at outlet side；Wherein, when
An at least current-carrying conductor occur leaking electricity or the detection at temperature when exceeding predetermined temperature, the electrical connection equipment
Electrically connected disconnection between the power supply.
On the other hand the utility model also proposed a kind of electrical equipment including earth leakage protective device, including：Plug, use
In being coupled to power supply；Wherein, when leaking electricity occurs in an at least current-carrying conductor or the detection at temperature beyond predetermined
During temperature, the electrically connected disconnection between the electrical equipment and the power supply.
By using the technical solution of the utility model, temperature monitoring unit is added in earth leakage protective device so that use
Electric equipment can avoid working long hours under the high temperature conditions, greatly improve the security of circuit.
Brief description of the drawings
Refer to the attached drawing shows and illustrates embodiment.These accompanying drawings be used for illustrate general principle, so as to illustrate only for
Understand the necessary aspect of general principle.These accompanying drawings are not in proportion.In the accompanying drawings, identical reference represents similar
Feature.
Fig. 1 shows the electrical block diagram according to the utility model first embodiment；
Fig. 2 shows the electrical block diagram according to the utility model second embodiment；
Fig. 3 shows the electrical block diagram according to the utility model 3rd embodiment；
Fig. 4 shows the electrical block diagram according to the utility model fourth embodiment.
Embodiment
In the specific descriptions of following preferred embodiment, by with reference to forming the appended attached of the utility model part
Figure.Appended accompanying drawing, which has been illustrated by way of example, can realize specific embodiment of the present utility model.The implementation of example
Example is not intended as limit according to all embodiments of the present utility model.It is appreciated that without departing from the scope of the utility model
Under the premise of, other embodiment can be utilized, structural or logicality modification can also be carried out.Therefore, it is following specific to retouch
State and nonrestrictive, and the scope of the utility model is defined by the claims appended hereto.
The utility model is that the thermistor for varying with temperature resistance has the zero of high temperature risk in electrical appliance
In part or space, position and quantity can be configured according to security evaluation, when temperature reaches the pre-set value of thermistor
When, because the resistance of thermistor changes, the control for being passed to signal inside protector by detection of electrical leakage signal wire is electric
Road, protector are cut off the electricity supply, and protect personal safety as well as the property safety.
By setting temperature observation circuit, the high temperature caused by the operation irregularity of electrical equipment or failure can be avoided.
Thought of the present utility model is specifically described with reference to the embodiment shown in Fig. 1-4.
As shown in figure 1, in the earth leakage protective device, including：(1) switch element 101, it includes being separately positioned on zero line
(N) switched with the reset RESET on live wire (L), it can disconnect in the presence of solenoid SOL or connection earth leakage protective fills
It is electrically connected between the input and output end put；(2) detection of electrical leakage unit 102, it includes current-carrying conductor 6,8,11 and used
In the detection of electrical leakage line 3 of the drain conditions of detection current-carrying conductor；(3) temperature monitoring unit 103, it is included with resistance R6, two poles
Pipe D6 tie point, and with thermo-sensitive resistor RT1, diode D9 the second branch road, tie point is coupled to L lines, and passes through
The control pole of controllable silicon SCR is couple to by resistance R2, and N lines are coupled to via detection of electrical leakage line 3, the second branch road.Temperature is supervised
At least a portion of unit 103 is surveyed, for example, thermo-sensitive resistor RT is arranged at the detection position (compressor in Fig. 1 of electrical appliance
On).Thermo-sensitive resistor RT1 working characteristics increases for resistance with the rising of temperature.
The outside of current-carrying conductor 6,8,11 is coated with insulating barrier (for example, rubber, plastics), wherein, the insulation of current-carrying conductor 6,11
Layer outside again be coated with layer of metal conductor 4,9, detection of electrical leakage line 3 is arranged between metallic conductor 4,9, and with metallic conductor 4,
9 are in contact.In one embodiment, detection of electrical leakage line 3, metallic conductor 4,9 can also be coated simultaneously with metallic conductor and carried
The insulating barrier of streamline 8, so as to which three current-carrying conductors be shielded with extraneous.
Based on above-mentioned setting, the control electrode potential of controllable silicon SCR will be influenceed by resistance RT3 change in resistance, below to this
The workflow of earth leakage protective device is described below：
1) temperature is normal at detection
Electrical appliance each several part is working properly, and tie point, the second branch road form loop, due to now resistance RT resistance compared with
It is low, therefore, the low voltage of A points, controllable silicon SCR can not be triggered, the input, output end of earth leakage protective device can the company of holding
Connect, electrical appliance normal work.
2) temperature raises at detection
When compressor causes temperature to raise because of operation irregularity or failure, with temperature raise or when temperature be increased to it is pre-
If during value, resistance RT1 resistance, which becomes, greatly enables to the current potential of A points to trigger controllable silicon SCR conducting enough.On solenoid SOL
Produce high current so that reset switch RESET trippings, it is electrically connected between cut-out input and output, prevent the temperature of compressor
Degree continues rise and causes fire.
3) leaky
When there is leaky between current-carrying conductor 6,8,11, detection of electrical leakage line 3 can be detected by metallic conductor 4,9
The leaky, now will be powered on detection of electrical leakage line 3, and then forward voltage drop is formed on resistance R3, triggers controllable silicon
SCR is turned on, and then to produce high current on solenoid SOL so that reset switch RESET trippings, between cut-out input, output
It is electrically connected.Equally, when detection of electrical leakage line 3 does not detect leaky, controllable silicon SCR will be unable to turn on.
From the polarity connected mode of diode D6, D9 in Fig. 1, tie point and the second branch road will be in positive half cycle weeks
In phase effectively, if its polarity is inverted, it would operate in the negative half period cycle, be now also required to resistance R6 and/or
R9 is configured, to ensure that controllable silicon SCR in the case of no electric leakage or without excess temperature, will not be switched on.
It is understood that in another embodiment, tie point may be also connected to N lines, and correspondingly, the second branch road coupling
It is connected to L lines.
It should be understood that thermo-sensitive resistor may be mounted at any position in need of household electrical appliance.Fig. 2 shows this reality
With the schematic diagram of new second embodiment.
Compared to Fig. 1, the earth leakage protective device in Fig. 2 also includes the thermo-sensitive resistor RT2 on control panel, and makes
It is in parallel with resistance RT1 to obtain resistance RT2.In this way, when the temperature rise on control panel and/or compressor, resistance RT1's and RT2
Parallel resistance value will also raise, and this can equally lift the current potential of A points.
Fig. 3 shows the schematic diagram of the utility model 3rd embodiment.In this embodiment, thermo-sensitive resistor RT3 work
Characteristic reduces for resistance with the rising of temperature.
As illustrated, temperature monitoring unit 103 includes thermo-sensitive resistor RT3, resistance RT3 easily produces installed in electrical appliance 105
The position of raw high temperature risk, such as in compressor or transformer or control board etc..Thermo-sensitive resistor RT3 one end is coupled to N lines,
The other end is coupled to the control pole of controllable silicon SCR via detection of electrical leakage line 3, resistance R2.Therefore, the control pole electricity of controllable silicon SCR
Position is determined by resistance R3, R2 and RT3.
When 105 normal work of electrical appliance, resistance RT3 is in high resistant state of value, and the current potential on resistance R3 can not trigger can
Silicon SCR conductings are controlled, so as to which input and output end can keep electrically connected.When causing resistance because of electrical appliance exception or failure
Temperature rise at RT3, and when temperature is increased to resistance RT3 desired temperatures, resistance RT3 resistance will be reduced to be made enough
The resistance of controllable silicon SCR conducting is obtained, that is, causes the voltage on resistance R3 to increase to triggering controllable silicon SCR enough.Then, solenoid
Electric current is produced on SOL, makes reset switch RESET trippings, it is electrically connected between cut-out input and output, prevent electrical appliance 105
Further heat up.
Similarly, the earth leakage protective device can include more thermo-sensitive resistors, those thermo-sensitive resistors can it is in parallel after coupling
It is connected to N lines.In another embodiment, thermo-sensitive resistor can also be coupled to L lines.
Fig. 4 is the schematic diagram according to the 4th embodiment of the present utility model.In this embodiment, thermo-sensitive resistor RT4,
RT5 working characteristics reduces for resistance with the rising of temperature.
Thermo-sensitive resistor RT4, RT5 are arranged on compressor and control panel.Thermo-sensitive resistor RT4, RT5 one end difference
L lines and N lines are coupled to, and the control pole of controllable silicon SCR is coupled to via detection of electrical leakage line 3, resistance R2.In this way, controllable silicon
SCR's controls electrode potential as the current potential on resistance R3.
When electrical appliance normal work, thermo-sensitive resistor RT4, RT5 are in high value, and the current potential on resistance R3 can not trigger can
Silicon SCR conductings are controlled, can be kept between input and output end electrically connected.
When electrical appliance exception or failure, the temperature at resistance RT4 and/or RT5 will raise, and reach resistance when temperature rises
During RT4 and/or RT5 desired temperatures, resistance RT4 and/or RT5 resistance will become can as low as cause L lines or N lines into controllable silicon enough
SCR control pole provides trigger signal, and then causes solenoid SOL to produce electric current, makes reset switch RESET trippings, cuts off defeated
Enter end output end between it is electrically connected, prevent the temperature of electrical appliance from continuing rise and causing fire.
The utility model in earth leakage protective device by adding temperature observation circuit so that earth leakage protective device can
Avoid working long hours under the high temperature conditions, greatly improve the security of circuit.
The utility model also proposed the electrical connection equipment using the earth leakage protective device in above-described embodiment, and it is wrapped
Include：Input interface, for being coupled to power supply at input side；Output interface, for being coupled to electrical equipment at outlet side.Cause
This, when at least a current-carrying conductor leaks electricity, detection of electrical leakage unit will cause switch element to disconnect input interface and connect with output
It is electrically connected between mouthful.When temperature at temperature monitoring exceeds predetermined temperature, temperature monitoring unit will also cause switch
It is electrically connected between unit disconnection input interface and output interface, it is coupled to power supply via electrical connection equipment so as to protect
Electrical equipment.
The utility model also proposed the electrical equipment using the earth leakage protective device in above-described embodiment, and it includes being used for
It is coupled to the plug of power supply.Wherein, when leaking electricity occurs in an at least current-carrying conductor or temperature monitoring at temperature beyond predetermined
During temperature, electrically connected between electrical equipment and power supply will break in the presence of detection of electrical leakage unit or temperature monitoring unit
Open.
Therefore, although describing the utility model with reference to specific example, wherein these specific examples are merely intended to
It is exemplary, rather than the utility model is limited, but it is obvious to those skilled in the art
It is that on the basis of spirit and scope of the present utility model is not departed from, the disclosed embodiments can be changed, increased
Add or delete.
Claims (10)
- A kind of 1. earth leakage protective device, it is characterised in that including：Switch element, it is used for electrically connected between control signal and output end；Detection of electrical leakage unit, it includes more current-carrying conductors and at least an electric-examination survey line, wherein the electro-detection line is used to detect At least a current-carrying conductor whether there is leakage current；Temperature monitoring unit, it includes being arranged at least one resistive temperature-sensing element at detection, at least one temperature-sensitive member Part is coupled to the switch element via the electric-examination survey line, and the temperature monitoring unit is controlled according to the temperature at the detection Make the switch element.
- 2. earth leakage protective device as claimed in claim 1, it is characterised in that the temperature monitoring unit also includes first Road, one end of the tie point are coupled to a current-carrying conductor in the more current-carrying conductors, and the other end is via the electro-detection Line is coupled at least one resistive temperature-sensing element, and at least one resistive temperature-sensing element is coupled to the more loads Another current-carrying conductor in streamline.
- 3. earth leakage protective device as claimed in claim 1, it is characterised in that at least one resistive temperature-sensing element is temperature sensitive Resistance.
- 4. earth leakage protective device as claimed in claim 3, it is characterised in that the temperature at the detection is more than or equal to temperature During threshold value, the resistance of the thermo-sensitive resistor, which will increase or be reduced into, enables to the switch element to disconnect the input and institute State electrically connected between output end.
- 5. earth leakage protective device as claimed in claim 2, it is characterised in that the tie point is included via the first diode The first resistor of the electric-examination survey line is coupled to, and at least one resistive temperature-sensing element is via at least one diode coupling Another current-carrying conductor being connected in the more current-carrying conductors.
- 6. earth leakage protective device as claimed in claim 1, it is characterised in that at least one resistive temperature-sensing element is coupled to The current-carrying conductor that is identical or differing.
- 7. earth leakage protective device as claimed in claim 1, it is characterised in that the temperature monitoring unit is coupled to the switch The control terminal of switch element in unit, it is electrically connected between the input and the output end to control.
- 8. earth leakage protective device as claimed in claim 7, it is characterised in that the switch element is controllable silicon, and described Controllable silicon according to caused by the detection of electrical leakage unit and/or the temperature monitoring unit drive signal and turn on.
- 9. a kind of electrical connection equipment using earth leakage protective device as claimed in any of claims 1 to 8 in one of claims, its feature It is, including：Input interface, for being coupled to power supply at input side；Output interface, for being coupled to electrical equipment at outlet side；Wherein, when leaking electricity occurs in an at least current-carrying conductor or the detection at temperature exceed predetermined temperature when, it is described Electrically connected disconnection between electrical connection equipment and the power supply.
- 10. a kind of electrical equipment using earth leakage protective device as claimed in any of claims 1 to 8 in one of claims, its feature exists In, including：Plug, for being coupled to power supply；Wherein, when leaking electricity occurs in an at least current-carrying conductor or the detection at temperature exceed predetermined temperature when, institute State the electrically connected disconnection between electrical equipment and the power supply.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720355793.8U CN206697914U (en) | 2017-04-06 | 2017-04-06 | Earth leakage protective device, electrical connection equipment and electrical equipment |
| US15/595,008 US20180292443A1 (en) | 2017-04-06 | 2017-05-15 | Leakage current protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720355793.8U CN206697914U (en) | 2017-04-06 | 2017-04-06 | Earth leakage protective device, electrical connection equipment and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206697914U true CN206697914U (en) | 2017-12-01 |
Family
ID=60441539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720355793.8U Active CN206697914U (en) | 2017-04-06 | 2017-04-06 | Earth leakage protective device, electrical connection equipment and electrical equipment |
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| Country | Link |
|---|---|
| CN (1) | CN206697914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695822A (en) * | 2017-04-06 | 2018-10-23 | 苏州益而益电器制造有限公司 | Earth leakage protective device |
-
2017
- 2017-04-06 CN CN201720355793.8U patent/CN206697914U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695822A (en) * | 2017-04-06 | 2018-10-23 | 苏州益而益电器制造有限公司 | Earth leakage protective device |
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