CN209198582U - A kind of earth detector and water storage apparatus - Google Patents
A kind of earth detector and water storage apparatus Download PDFInfo
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- CN209198582U CN209198582U CN201821680870.8U CN201821680870U CN209198582U CN 209198582 U CN209198582 U CN 209198582U CN 201821680870 U CN201821680870 U CN 201821680870U CN 209198582 U CN209198582 U CN 209198582U
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Abstract
The utility model is suitable for detection of electrical leakage technical field, and providing a kind of earth detector and water storage apparatus, the device includes: to be arranged at intervals on intracorporal first detection probe of water and the second detection probe；It include the mutual inductor of first winding and secondary winding, secondary winding is connected with first detection probe and the second detection probe；It is concatenated with the first winding of mutual inductor, the controller of control circuit on-off.Resistance very little of the utility model embodiment due to mutual inductor itself, and the resistance of water is far longer than the resistance of mutual inductor itself, once water pipe has electric current to pass through, the electric current in water body between different test points can be sensitively detected very much by the first detection probe and the second detection probe, to detect the leakage current in water body, controller cuts off the power supply of heating module immediately, prevent the generation of accident, realize the detection of electrical leakage to low current, it can detecte using mutual inductor and be less than 0.1mA electric current, it simultaneously also can quick response with high sensitivity.
Description
Technical field
The utility model belongs to detection of electrical leakage technical field more particularly to a kind of earth detector and water storage apparatus.
Background technique
In the prior art, the generation of electric shock accidents in order to prevent, generally will be installed earth leakage circuit-breaker, especially water storage
Device (such as water heater) can also match an earth leakage circuit-breaker again, be dedicated for water storage device use.Detecting water storage device is
The existing method of no electric leakage often adds magnet ring detection, when the electric current for flowing through firewire and zero curve is different on firewire and zero curve
When big, mutual inductor just has voltage generation, illustrates there is electric leakage.However, the earth leakage circuit-breaker on existing water storage device, only
Have and cuts off the power when leakage current is greater than 30mA (leakage current of national Specification) Shi Caihui.Moreover, existing electric leakage inspection
Surveying mostly is for preventing firewire from having the case where electric leakage, however if ground wire (PE line) does not install, can also have an electric leakage can
Can, lead to security risk occur.When the leakage current of water storage device is less than 30mA, although not will cause fatefulue injury,
It is that calandria electric leakage can only flow to pond by water inlet pipe and outlet pipe, when human contact is to pond, due to the resistance of human body
It is relatively small, it just has electric current and passes through, be easy to cause Danger Electric shock risk, simultaneously because thinking the reason of mutual inductor and various interference
It detects and is also difficult to realize less than 30mA leakage current, therefore, how effectively to detect low current electric leakage becomes this field urgently
The technical issues of solution.
Utility model content
The utility model provides a kind of earth detector, it is intended to solve the problems, such as how effectively to detect low current electric leakage.
The utility model is realized in this way a kind of earth detector, comprising:
It is arranged at intervals on intracorporal first detection probe of water and the second detection probe；
It include the mutual inductor of first winding and secondary winding, the secondary winding and first detection probe and second
Detection probe series connection；
It is concatenated with the first winding of the mutual inductor, the controller of control circuit on-off.
Further, signal acquisition amplifier is additionally provided between the mutual inductor and controller.
Further, the mutual inductor is current transformer.
The utility model also provides a kind of water storage apparatus, including heater and the earth detector, the control
Device is arranged between the heater and power supply.
Further, the equipment further includes water inlet pipe and outlet pipe, and the heater is arranged on water inlet pipe.
Further, first detection probe and the second detection probe are arranged at intervals in water inlet pipe.
Further, the earth detector further include be arranged at intervals in the outlet pipe third detection probe and
4th detection probe.
Earth detector provided by the embodiment of the utility model, due to the resistance very little of mutual inductor itself, and the electricity of water
The resistance that resistance is far longer than mutual inductor itself passes through the first detection probe and the second detection probe once water pipe has electric current to pass through
It can sensitively detect very much the electric current in water body between different test points, to detect the leakage current in water body, control
Device cuts off the power supply of heating module immediately, prevents the generation of accident, realizes the detection of electrical leakage to low current, uses mutual inductor can be with
It detects and is less than 0.1mA electric current, it simultaneously also can quick response with high sensitivity.
Detailed description of the invention
Fig. 1 is the earth detector block diagram that the utility model embodiment one provides；
Fig. 2 is the earth detector block diagram that the utility model embodiment two provides；
Fig. 3 is the earth detector block diagram that the utility model embodiment four provides；
Fig. 4 is the earth detector circuit diagram that the utility model embodiment four provides；
Fig. 5 is the earth detector circuit diagram that the utility model embodiment five provides；
Fig. 6 be the utility model embodiment six provide test point A and B before equivalent circuit diagram.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The utility model embodiment provides a kind of earth detector, including: it is arranged at intervals on water intracorporal
One detection probe and the second detection probe；Secondary winding and the first detection probe and the concatenated mutual inductor of the second detection probe；With
The first winding of mutual inductor is concatenated, the controller of control circuit on-off.Due to the resistance very little of mutual inductor itself, and the electricity of water
The resistance that resistance is far longer than mutual inductor itself passes through the first detection probe and the second detection probe once water pipe has electric current to pass through
It can be detected the electric current in water body between different test points, be sent to controller after mutual inductor acquisition electric current, flow through mutual inductor
Leakage current in electric current, that is, water body realizes the detection of electrical leakage to low current, and controller is according to the logical of leakage current control circuit
It is disconnected, it can detecte using mutual inductor and be less than 0.1mA electric current, it simultaneously also can quick response with high sensitivity.
Embodiment one
The utility model embodiment provides a kind of earth detector, as shown in Figure 1, comprising:
It is arranged at intervals on intracorporal first detection probe 100 of water and the second detection probe 200；
It include the mutual inductor 300 of first winding and secondary winding, secondary winding and the first detection probe 100 and the second inspection
Probing head 200 is connected；
It is concatenated with the first winding of mutual inductor 300, the controller 400 of control circuit on-off.
Above-mentioned earth detector working principle is: the first detection probe 100 and the second detection probe 200 detect water respectively
The electric current of difference test point, mutual inductor 300 are sent to controller 400 after acquiring electric current in vivo, and controller 400 is according to size of current
The on-off of control circuit, when the electric current detected is greater than safe current, the power supply of 400 disconnecting circuit of controller prevents accident
Occur.
Earth detector provided by the embodiment of the utility model, due to the resistance very little of mutual inductor 300 itself, and water
Resistance is far longer than the resistance of mutual inductor 300 itself, once water pipe has electric current to pass through, passes through the first detection probe 100 and second
Detection probe 200 can sensitively detect the electric current in water body between different test points very much, to detect the leakage in water body
Electric current, controller 400 cut off the power supply of heating module immediately, prevent the generation of accident, realize the detection of electrical leakage to low current,
It can detecte using mutual inductor 300 and be less than 0.1mA electric current, it simultaneously also can quick response with high sensitivity.
Embodiment two
The utility model embodiment provides a kind of earth detector, as shown in Fig. 2, on the basis of example 1,
Signal acquisition amplifier 500 is additionally provided between mutual inductor 300 and controller 400.The effect of signal acquisition amplifier 500 is to put
Big signal, since the signal acquisition amplifier 500 that the application uses is the module of market purchasing, specific structure and circuit are not
The innovative point of the application, therefore, the specific structure of signal acquisition amplifier 500 and circuit are not limited thereto and repeat.
In the present embodiment, since the collected electric current of mutual inductor 300 is usually smaller, pass through signal acquisition amplifier
500 amplify after again input controller 400 carry out connecting and disconnecting of the circuit control.
Embodiment three
The utility model embodiment provides a kind of earth detector, and on the basis of example 1, mutual inductor is electricity
Current transformer.
In the present embodiment, mutual inductor can be current transformer, be also possible to voltage transformer, current transformer is to small electricity
The detection of stream is sensitiveer, to realize that therefore, the mutual inductor of the present embodiment preferentially selects Current Mutual Inductance to the detection of electrical leakage of low current
Device.
Example IV
The utility model embodiment provides a kind of water storage apparatus, as shown in Figure 3 and Figure 4, including heater 600 and reality
Any earth detector in example one to three is applied, controller 400 is arranged between heater 600 and power supply 700.The heater
600 can be heating resistance wire or other electrically heated heating vessels.
In the present embodiment, heater 600 is separately connected the zero curve AC_N and firewire AC_L of alternating current, and controller 400C is
MCU, once there is electric current by the mutual inductor 300 in earth detector, controller 400 cuts off the power supply of heater 600 immediately,
Prevent the generation of electric shock accidents.
Embodiment five
The utility model embodiment provides a kind of water storage apparatus, on the basis of example IV, as shown in figure 5, this sets
Standby further includes water inlet pipe 800 and outlet pipe 900, and heater 600 is arranged on water inlet pipe 800.
In the present embodiment, heater 600 is located in pond, to the water body in water inlet pipe 800 in the water storage apparatus course of work
Heating, once there is electric current to collect leakage current by the first detection probe 100 and the second detection probe 200, mutual inductor 300,
Controller 400 cuts off the power supply of heater 600 immediately, prevents the generation of electric shock accidents.
Embodiment six
The utility model embodiment provides a kind of water storage apparatus, on the basis of embodiment five, the first detection probe 100
It is arranged at intervals in water inlet pipe 800 with the second detection probe 200.
As shown in Figure 5, Figure 6, in the present embodiment, the first detection probe 100 and the second detection probe 200 be arranged at intervals on into
At test point A and B in water pipe 800, Fig. 6 is the equivalent circuit before test point A and B, due to the resistance of mutual inductor 300 itself
(R1) very little generally is within 50 ohm, the water resistance (R2) between A to B point, can be different and different according to water quality, but not
It can be less than 1000 ohm.From fig. 6 it can be seen that R1 and R2 is parallel connection, so the leakage current I=Ir1+ in water inlet pipe 800
Ir2, wherein Ir1 is the leakage current for flowing through R1, and Ir2 is the leakage current for flowing through R2.Due to voltage in water inlet pipe 800 and water outlet
Voltage equal i.e. Vr1=Vr2, and R1<<R2 in pipe 900, then Ir1>>Ir2.So by the electric current of mutual inductor 300, as into
The leakage current of water pipe.Test point C and D are similarly.Mutual inductor 300 can detecte the leakage current less than 0.1mA, available high
Sensitivity simultaneously also can quick response.
Embodiment seven
The utility model embodiment provides a kind of water storage apparatus, and on the basis of embodiment five, earth detector is also
Including being arranged at intervals on third detection probe and the 4th detection probe in outlet pipe 900.
As shown in figure 5, third detection probe and the 4th detection probe are arranged at intervals in outlet pipe 900 in the present embodiment
Test point C and D, third detection probe connected with the 4th detection probe mutual inductor 300 ' carry out leakage current acquisition.
Earth detector provided by the embodiment of the utility model, due to the resistance very little of mutual inductor itself, and the electricity of water
The resistance that resistance is far longer than mutual inductor itself passes through the first detection probe and the second detection probe once water pipe has electric current to pass through
It can sensitively detect very much the electric current in water body between different test points, to detect the leakage current in water body, control
Device cuts off the power supply of heating module immediately, prevents the generation of accident, realizes the detection of electrical leakage to low current, uses mutual inductor can be with
It detects and is less than 0.1mA electric current, it simultaneously also can quick response with high sensitivity；The utility model embodiment also passes through letter
Number acquisition amplifier the electric current for flowing through mutual inductor is amplified after again input controller carry out connecting and disconnecting of the circuit control；For realization pair
The detection of electrical leakage of low current, the utility model embodiment mutual inductor use current transformer；The utility model embodiment also provides
A kind of water storage apparatus, heater are separately connected the zero curve and firewire of alternating current, and heater is located in pond, water storage apparatus work
The water body in water inlet pipe is heated in the process, once there is electric current by the first detection probe and the second detection probe, controller is vertical
The power supply for cutting off heater, prevents the generation of electric shock accidents.First detection probe and the second detection probe be arranged at intervals on into
Test point in water pipe passes through the electric current of mutual inductor, the as leakage current of water inlet pipe；Third detection probe and the 4th detection probe
The test point being arranged at intervals in outlet pipe, third detection probe and the 4th detection probe connect mutual inductor progress leakage current and adopt
Collection.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of earth detector characterized by comprising
It is arranged at intervals on intracorporal first detection probe of water and the second detection probe；
It include the mutual inductor of first winding and secondary winding, the secondary winding and first detection probe and the second detection
Probe series connection；
It is concatenated with the first winding of the mutual inductor, the controller of control circuit on-off.
2. earth detector as described in claim 1, which is characterized in that be additionally provided between the mutual inductor and controller
Signal acquisition amplifier.
3. earth detector as described in claim 1, which is characterized in that the mutual inductor is current transformer.
4. a kind of water storage apparatus, which is characterized in that including heater and the described in any item detection of electrical leakage dresses of claim 1-3
It sets, the controller is arranged between the heater and power supply.
5. water storage apparatus as claimed in claim 4, which is characterized in that the equipment further includes water inlet pipe and outlet pipe, described
Heater is arranged on water inlet pipe.
6. water storage apparatus as claimed in claim 5, which is characterized in that first detection probe and the second detection probe interval
It is arranged in water inlet pipe.
7. water storage apparatus as claimed in claim 5, which is characterized in that the earth detector further includes being arranged at intervals on institute
State third detection probe and the 4th detection probe in outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680870.8U CN209198582U (en) | 2018-10-17 | 2018-10-17 | A kind of earth detector and water storage apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680870.8U CN209198582U (en) | 2018-10-17 | 2018-10-17 | A kind of earth detector and water storage apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209198582U true CN209198582U (en) | 2019-08-02 |
Family
ID=67408239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821680870.8U Active CN209198582U (en) | 2018-10-17 | 2018-10-17 | A kind of earth detector and water storage apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209198582U (en) |
-
2018
- 2018-10-17 CN CN201821680870.8U patent/CN209198582U/en active Active
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