CN217305329U - Grounding detection circuit and electric equipment - Google Patents
Grounding detection circuit and electric equipment Download PDFInfo
- Publication number
- CN217305329U CN217305329U CN202123446408.6U CN202123446408U CN217305329U CN 217305329 U CN217305329 U CN 217305329U CN 202123446408 U CN202123446408 U CN 202123446408U CN 217305329 U CN217305329 U CN 217305329U
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- resistor
- emitting diode
- ground
- detection circuit
- electric equipment
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- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 230000007935 neutral effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 206010014357 Electric shock Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to the field of circuit detection, and discloses a grounding detection circuit and electric equipment, which comprises a first capacitor, a first resistor, a first light-emitting diode, a second resistor and a second light-emitting diode, wherein one end of the first capacitor is connected with a live wire of the electric equipment; one end of the first resistor is connected with the other end of the first capacitor; one end of the first light emitting diode is connected with the other end of the first resistor; one end of the second resistor is connected with the other end of the first light-emitting diode, and the other end of the second resistor is connected with a ground wire of the electric equipment; one end of the second light emitting diode is connected with one end of the second resistor, the other end of the second light emitting diode is connected with the other end of the first resistor, whether the electric equipment is electrified or not and whether the electric equipment is well grounded or not are determined through the light emitting states of the first light emitting diode and the second light emitting diode, and therefore safety of a user when the electric equipment is used can be guaranteed.
Description
Technical Field
The utility model relates to a circuit detection area, in particular to ground connection detection circuitry and consumer.
Background
The ground wire is a wire connecting the ground and the housing of the electric appliance in the power system or the electric appliance. In general, the earth wire is connected to the metal casing to prevent the electric shock accident caused by the internal insulation damage of the casing.
If the electrical equipment is not protected by grounding, when a certain part of the insulation is damaged or a certain phase line collides with the shell, the shell of the electrical equipment is electrified; or, although the electrical equipment is grounded, the ground line is not actually connected to the ground, and the housing is also charged, so that there is a risk of electric shock if a human body touches the charged housing of the electrical equipment.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a ground fault detection circuit and an electric device, which can improve the safety of a user when using the electric device.
In a first aspect, an embodiment of the present invention provides a ground fault detection circuit, which is disposed inside an electrical device, the ground fault detection circuit includes:
one end of the first capacitor is connected with a live wire of the electric equipment;
one end of the first resistor is connected with the other end of the first capacitor;
one end of the first light-emitting diode is connected with the other end of the first resistor;
one end of the second resistor is connected with the other end of the first light-emitting diode, and the other end of the second resistor is connected with a ground wire of the electric equipment;
and one end of the second light-emitting diode is connected with one end of the second resistor, and the other end of the second light-emitting diode is connected with the other end of the first resistor.
In some embodiments, one end of the first capacitor is further connected to a live line of the power supply terminal.
In some embodiments, the other end of the second resistor is further connected to a ground line of the power supply terminal.
In some embodiments, the neutral wire of the power supply end is connected with the neutral wire of the electric device.
In some embodiments, the first capacitance has a capacitance value of 1 nF.
In some embodiments, the first resistor has a resistance of 1K Ω.
In some embodiments, the second resistor has a resistance of 1K Ω.
In a second aspect, the embodiment of the present invention further provides an electrical apparatus, including the foregoing ground fault detection circuit, the ground fault detection circuit is located the inside of the electrical apparatus, the electrical apparatus passes through the ground fault detection circuit is connected with the power supply terminal.
Compared with the prior art, the beneficial effects of the utility model are that: be different from prior art's condition, the embodiment of the utility model provides a ground connection detection circuitry and consumer, through being connected the one end of first electric capacity with the live wire of consumer, the other end is connected with the one end of first resistance, be connected the other end of first resistance with first emitting diode's one end and second emitting diode's the other end respectively, be connected the one end of second resistance with first emitting diode's one end and second emitting diode's one end respectively, the other end ground connection of second resistance simultaneously, therefore, through the inside with above-mentioned ground connection detection circuitry setting at the consumer, through the luminescent state of first emitting diode and second emitting diode, confirm whether the consumer switches on, whether ground connection is good, thereby can guarantee the safety of user when using the consumer.
Drawings
One or more embodiments are illustrated in corresponding drawings which are not intended to be limiting, in which elements having the same reference number designation may be referred to as similar elements throughout the drawings, unless otherwise specified, and in which the drawings are not to scale.
Fig. 1 is a schematic diagram of a ground fault detection circuit provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection between a ground detection circuit and a power supply terminal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the ground line of the power supply terminal not being grounded according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 3, an embodiment of the present invention provides a ground fault detection circuit 10, wherein the ground fault detection circuit 10 is disposed inside an electrical device 1, a power source 11 is further disposed inside the electrical device 1, and the power source 11 includes a live line L, a ground line PE, and a zero line N. The electric equipment includes, but is not limited to, refrigerators, washing machines, electric cookers, smoke exhaust machines, and the like.
The ground detection circuit 10 includes a first capacitor C1, a first resistor R1, a first light emitting diode D1, a second resistor R2, and a second light emitting diode D2. The capacitance value of the first capacitor C1 is 1nF, and the resistances of the first resistor R1 and the second resistor R2 are both 1K Ω. It should be noted that the capacitance of the first capacitor C1, the resistance of the first resistor R1, and the resistance of the second resistor R2 may be set according to actual requirements, and are not limited in the present embodiment.
Specifically, one end of the first capacitor C1 is connected to the live line L of the powered device 1. The other end of the first capacitor C1 is connected to one end of a first resistor R1. The other end of the first resistor R1 is connected with one end of the first light emitting diode D1. The other end of the first light emitting diode D1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the ground PE of the electric device 1. One end of the second light emitting diode D2 is connected to one end of the second resistor R2, and the other end of the light emitting diode D2 is connected to the other end of the first resistor R1.
In some embodiments, as shown in fig. 2 or fig. 3, one end of the first capacitor C1 of the ground detection circuit 10 is further connected to the live line of the power supply terminal 20. The other end of the second resistor R2 is also connected to the ground of the power supply device 20. The neutral line N of the electric device 1 is connected to the neutral line of the power supply device 20. Compare in the conventional art, with the direct mode of being connected through power cord and alternating current electricity of electrical equipment the embodiment of the utility model provides an in, consumer 1 is connected with feeder ear 20 through ground connection detection circuitry 10, and then makes consumer 1 pass through ground connection detection circuitry and connects the alternating current, safety when can guarantee the user from this and use the consumer.
The utility model discloses, the mode of operation to ground detection circuitry is explained in detail below to be convenient for understand.
As shown in fig. 2, when the voltage of the live wire of the power supply terminal 20 is positive, the ac power with the frequency of 50Hz or 60Hz sequentially passes through the first capacitor C1, the first resistor R1, the first light emitting diode D1 and the second resistor R2, and finally flows through the ground wire PE of the electric device 1, so as to form a return circuit, and at this time, the first light emitting diode D1 emits light normally.
When the voltage of the live wire of the power supply terminal 20 is negative, the ac power with the frequency of 50Hz or 60Hz passes through the second resistor R2, the second led D2, the first resistor R1 and the first capacitor C1 in sequence, and at this time, the second led D2 emits light normally.
As shown in fig. 3, when the ground line of the power supply terminal 20 is not connected to the ground, the ac power with the frequency of 50Hz or 60Hz oscillates back and forth between the live line of the power supply terminal 20, the ground detection circuit 10, the electric device 1, and the ground line PE of the electric device 1. At this time, the first led D1 and the second led D2 both emit light, but the oscillating capacitance is not large, so the luminance of the first led D1 and the second led D2 is weak. Whether the ground line of the electric device is grounded may be determined by the light emitting states of the first and second light emitting diodes D1 and D2. Specifically, when the first light emitting diode D1 and the second light emitting diode D2 emit light normally, indicating that the electric device 1 is normally powered on, the ground line PE has a ground. When the first light emitting diode D1 and the second light emitting diode D2 emit light weakly, it indicates that the electric device 1 is normally powered on, and the ground line PE is not grounded. When neither the first light emitting diode D1 nor the second light emitting diode D2 emits light, it indicates that the electric device 1 is not powered.
The embodiment of the utility model provides a still provide an electric equipment, foretell ground connection detection circuitry can install in electric equipment's inside, specifically, ground connection detection circuitry is connected with electric equipment's live wire L and ground wire PE respectively, electric equipment passes through ground connection detection circuitry and is connected with the feeder ear, the luminescent state of the first emitting diode D1 of accessible and second emitting diode D2, confirm whether ground connection of electric equipment's ground wire, safety when can guaranteeing the user from this and use electric equipment.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, which are not intended as additional limitations to the present invention, and are provided for the purpose of making the understanding of the present disclosure more thorough and complete. Moreover, the above features are combined with each other to form various embodiments not listed above, and all of them are considered as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A ground fault detection circuit is provided inside an electric device, and is characterized by comprising:
one end of the first capacitor is connected with a live wire of the electric equipment;
one end of the first resistor is connected with the other end of the first capacitor;
one end of the first light-emitting diode is connected with the other end of the first resistor;
one end of the second resistor is connected with the other end of the first light-emitting diode, and the other end of the second resistor is connected with a ground wire of the electric equipment;
and one end of the second light-emitting diode is connected with one end of the second resistor, and the other end of the second light-emitting diode is connected with the other end of the first resistor.
2. The ground detection circuit of claim 1, wherein one end of the first capacitor is further connected to a hot line of a power supply terminal.
3. The ground detection circuit of claim 2, wherein the other end of the second resistor is further connected to a ground line of the power supply terminal.
4. The ground detection circuit of claim 3, wherein a neutral line of the power supply terminal is coupled to a neutral line of the powered device.
5. The ground detection circuit of any one of claims 1-4, wherein the first capacitance has a capacitance of 0.1-10 nF.
6. The ground detection circuit of any one of claims 1-4, wherein the first resistor has a resistance of 0.5-5 kq.
7. The ground detection circuit of any one of claims 1-4, wherein the second resistor has a resistance of 0.5-5 kq.
8. An electric device comprising the ground fault detection circuit according to any one of claims 1 to 7, wherein the ground fault detection circuit is provided inside the electric device, and the electric device is connected to a power supply terminal via the ground fault detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123446408.6U CN217305329U (en) | 2021-12-31 | 2021-12-31 | Grounding detection circuit and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123446408.6U CN217305329U (en) | 2021-12-31 | 2021-12-31 | Grounding detection circuit and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217305329U true CN217305329U (en) | 2022-08-26 |
Family
ID=82922397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123446408.6U Expired - Fee Related CN217305329U (en) | 2021-12-31 | 2021-12-31 | Grounding detection circuit and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217305329U (en) |
-
2021
- 2021-12-31 CN CN202123446408.6U patent/CN217305329U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |