CN213484762U - Intelligent household power supply - Google Patents
Intelligent household power supply Download PDFInfo
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- CN213484762U CN213484762U CN202022635425.3U CN202022635425U CN213484762U CN 213484762 U CN213484762 U CN 213484762U CN 202022635425 U CN202022635425 U CN 202022635425U CN 213484762 U CN213484762 U CN 213484762U
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Abstract
The utility model discloses an intelligent household power supply, which comprises a main control unit, a power input unit and a power output unit, wherein the power input unit comprises an input protection ground and the power output unit outputs a protection ground; the trigger circuit is electrically connected with the enable end of the switch circuit, and the resistance circuit is electrically connected with the main control unit; the resistance circuit is connected between an input protection ground and an output protection ground in series; the switch circuit is connected in series between the input protection ground or the output protection ground and the resistance circuit; the trigger circuit enables the switch circuit to conduct and cut off the resistance circuit and the input protection ground or the output protection ground, so that the resistance circuit collects the voltage of the input protection ground and the output protection ground, and the main control unit controls the power output unit to be turned on and turned off according to the received voltage. It is visible, the utility model discloses can start the ground connection according to actual need and detect the function, the safety of deprotection power, equipment and user.
Description
Technical Field
The utility model relates to the technical field of household appliances, especially, relate to an intelligence domestic power supply.
Background
The existing household power supply is mainly provided with an electric shock prevention measure by adopting a leakage switch, an air switch, a leakage/air combination switch, a fuse and the like. Although the existing electric shock prevention measures can improve the safety of electricity utilization to a certain extent. However, there still exist some problems, such as that the switching action has a time delay, so that the response speed of the earth protection is slow, and after the switching action, a fault point is difficult to occur, so that an electric shock accident may occasionally occur. In addition, most of the existing household power supplies detect whether a ground fault exists or not by detecting current. Because the current detection has errors and contradiction also exists in the setting of the current threshold value, if the set current is small, false operation can occur, and the use is influenced; if the current setting is large, it is unsafe.
Therefore, those skilled in the art are urgently required to design an intelligent household power supply capable of accurately detecting a ground fault.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: the utility model provides an intelligence domestic power can start the ground connection according to actual need and detect the function, has improved the security of using.
In order to solve the technical problem, the technical scheme of the utility model is that:
an intelligent household power supply comprises a main control unit, a power input unit and a power output unit, wherein the power input unit and the power output unit are respectively electrically connected with the main control unit; the trigger circuit is electrically connected with an enabling end of the switch circuit, and the resistance circuit is electrically connected with the main control unit; the resistance circuit is connected in series between the input protection ground and the output protection ground; the switch circuit is connected between the input protection ground and the resistance circuit in series, or the switch circuit is connected between the output protection ground and the resistance circuit in series; the trigger circuit acts to enable the switch circuit, the resistor circuit and the input protection ground are switched on and switched off, or the resistor circuit and the output protection ground are switched on and switched off, so that the resistor circuit collects the voltages of the input protection ground and the output protection ground and transmits the voltages to the main control unit, and the main control unit is used for controlling the power output unit to be switched on and switched off according to the received voltage.
Preferably, the system further comprises an alarm unit electrically connected with the main control unit.
Preferably, the trigger circuit comprises a control button.
Preferably, the trigger circuit includes a timing unit.
Preferably, the resistance circuit includes a detection resistor connected in series between the input protection ground and the output protection ground.
Preferably, the alarm unit includes a speaker.
The preferred mode is that the power supply further comprises a rectification filter unit, a high-frequency inversion unit, a high-frequency isolation unit, a high-frequency rectification filter unit and a low-frequency inversion filter unit which are electrically connected in sequence; the rectification filtering unit is electrically connected with the power input unit; the low-frequency inversion filtering unit is electrically connected with the power output unit; the high-frequency inversion unit and the low-frequency inversion filtering unit are respectively electrically connected with the main control unit.
Preferably, the high frequency isolation unit comprises a 26KHz isolation transformer.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the utility model discloses an intelligent household power supply, which comprises a main control unit, a power input unit and a power output unit, wherein the power input unit comprises an input protection ground, and the power output unit comprises an output protection ground; the trigger circuit is electrically connected with the enable end of the switch circuit, and the resistance circuit is electrically connected with the main control unit; the resistance circuit is connected between an input protection ground and an output protection ground in series; the switch circuit is connected between an input protection ground and the resistance circuit in series, or the switch circuit is connected between an output protection ground and the resistance circuit in series; the trigger circuit acts to enable the switch circuit, the resistance circuit and the input protection ground are switched on and off, or the resistance circuit and the output protection ground are switched on and off, so that the resistance circuit collects the voltages of the input protection ground and the output protection ground and transmits the voltages to the main control unit, and the main control unit is used for controlling the power output unit to be switched on and switched off according to the received voltage. Therefore, the trigger circuit is triggered to enable the switch circuit to be switched on or off, and when the switch circuit is switched off, the switch circuit is equivalent to a resistor circuit which is not put into use; when the switch circuit is switched on, the resistance circuit can detect the voltage between the input protection ground and the output protection ground, and once the ground fault occurs, the voltage transmitted to the main control unit by the resistance circuit changes, so that the main control unit can cut off the power output unit in time to protect the safety of the voltage, equipment and users. It is visible, the utility model discloses can start the ground connection according to actual need and detect the function, improve the security of using.
The alarm device also comprises an alarm unit electrically connected with the main control unit; when the grounding detection function is started, an alarm is given once a grounding fault occurs, and a user is informed in time.
Because the resistance circuit comprises the detection resistor which is connected between the input protection ground and the output protection ground in series, a low-cost circuit structure is adopted.
Since the alarm unit includes a speaker, an alarm is given by sound when a ground fault occurs.
Since the high-frequency isolation unit comprises the 26KHz isolation transformer, the volume of the isolation transformer is reduced, and the volume of a power supply is reduced.
Drawings
Fig. 1 is a schematic block diagram of an intelligent household power supply of the present invention;
FIG. 2 is a circuit diagram of a low frequency inverse filter unit in an embodiment;
FIG. 3 is a circuit diagram of a high frequency inverter unit in an embodiment;
FIG. 4 is a circuit diagram of a rectifying and filtering unit in an embodiment;
FIG. 5 is a circuit diagram of a high frequency rectifying and filtering unit in an embodiment;
FIG. 6 is a circuit diagram of a power supply output unit in the embodiment;
in the figure: 1-resistance circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, an intelligent household power supply comprises a main control unit, wherein the main control unit can comprise a single chip microcomputer circuit, and the single chip microcomputer circuit can be an STM32 series single chip microcomputer; the power input unit comprises an input live wire, an input zero wire and an input protection ground, the power output unit comprises an output live wire, an output zero wire and an output protection ground, the power output unit comprises a transformer T2 and a relay K2, and the power input unit and the power output unit are respectively electrically connected with the main control unit, wherein the power output unit comprises an output live wire, an output zero wire and an output protection ground, and is shown in figure 6 and comprises a transformer T2 and a relay K2, and AC10 and AC11, AC-10 and AC-11 are respectively electrically; the trigger circuit is electrically connected with an enabling end of the switch circuit, and the resistance circuit 1 is electrically connected with the main control unit; in this example, the resistor circuit 1 comprises a detection resistor connected in series between an input protection ground and an output protection ground, the detection resistor preferably being 1M ohm; the resistance circuit 1 is connected in series between an input protection ground and an output protection ground; the switch circuit is connected in series between the input protection ground and the resistance circuit 1, or the switch circuit is connected in series between the output protection ground and the resistance circuit 1; the trigger circuit acts to enable the switch circuit, the resistance circuit 1 and the input protection ground are switched on and switched off, or the resistance circuit and the output protection ground are switched on and switched off, so that the resistance circuit 1 collects the voltages of the input protection ground and the output protection ground and transmits the voltages to the main control unit, and the main control unit is used for controlling the power output unit to be switched on and switched off according to the received voltage.
The utility model discloses intelligence domestic power supply drops into operation the back, can launch ground connection detection function according to actual need, perhaps does not launch. When the circuit is started, the trigger circuit is triggered, the trigger circuit transmits and conducts corresponding electric signals to the switch circuit, and the resistance circuit is conducted with an input protection ground and an output protection ground respectively to detect the voltage between the input protection ground and the output protection ground. After the resistor circuit 1 is started, the resistor circuit is completely isolated from a user power supply under the condition of no electric shock, so that the safe power utilization of a user is ensured. When the user gets an electric shock from the power supply, the user still can be safe because the power supply is connected with the ground at a single point.
Under normal conditions, the output live wire and the output zero wire are completely isolated from the input live wire, the input zero wire and the input protection ground. Therefore, the input zero line, the output zero line and the output live line have no current loop and no voltage. When output zero line or output live wire pass through human body or other reasons ground connection, if output protection ground and input protection ground all fine ground connection, then output return circuit has had public ground connection with input return circuit, and output live wire and output zero line have had voltage with the input zero line, the utility model discloses utilize this voltage to judge whether ground connection of output. If the output protective ground and the input protective ground are not grounded, the input loop and the output loop have a common ground due to the existence of the detection resistor, and voltages are provided between the output live wire and the output zero wire and between the input zero wire.
To sum up, the utility model discloses an utilize the voltage between input protection ground and the output protection ground, judge whether there is ground fault, mainly utilize the voltage between output live wire and output zero line and the input zero line, as long as the output does not electrocute ground connection, detection voltage is exactly 0V. If the output is grounded, the detection voltage is more than 200V. Therefore, the utility model discloses a ground connection detection circuitry can not appear misjudgement, detects the accuracy, and the protection is fast.
As shown in fig. 1, the utility model discloses still include the alarm unit who is connected with the main control unit electricity, alarm unit is but not limited to the speaker. When the ground fault does not occur, the loudspeaker does not sound, and when the voltage received by the main control unit is nonzero, the main control unit transmits an alarm signal to the alarm unit to drive the loudspeaker to sound so as to remind a user.
As shown in fig. 1, in this embodiment, the trigger circuit includes the control button, or the trigger circuit includes the timing unit, and in a preferred embodiment, the timing unit and the main control unit are integrally disposed, so that the structure is optimized, and the cost is reduced. When the control key is pressed, the switch circuit is switched on or switched off, so that the resistor circuit 1 is enabled or not enabled. In addition, the switch circuit can be but is not limited to a switch circuit formed by triodes, wherein the control key and the switch circuit can be respectively and electrically connected with the main control unit, the main control unit identifies the work of the control key, and the main control unit enables the on-off of the switch circuit.
The power supply further comprises a rectification filtering unit (the circuit structure is shown in fig. 4 and comprises rectifiers BT1 and BT2), a high-frequency inverter unit (the circuit structure is shown in fig. 3), a high-frequency isolation circuit, a high-frequency rectification filtering unit (the circuit structure is shown in fig. 5) and a low-frequency inverter filtering unit (the circuit structure is shown in fig. 2), wherein the rectification filtering unit is electrically connected with the power supply input unit, and the low-frequency inverter filtering unit is electrically connected with the power supply output unit; the high-frequency inversion unit and the low-frequency inversion filtering unit are respectively electrically connected with the main control unit. The high-frequency isolation unit comprises a 26KHz isolation transformer, so that the volume of the isolation transformer is reduced, and the volume of a power supply is reduced.
To sum up, compared with the prior art, the utility model, have following advantage:
1. the user power supply directly enters water without electric shock, and can touch a zero line and a live wire by bare feet, so that the safety and reliability of power utilization are greatly improved;
2. the leakage current is small, and a high-frequency isolation circuit is adopted, so that the leakage current is small and reaches microampere level;
3. the volume is small, and the household installation is convenient;
4. the leakage automatically cuts off the power supply and gives an alarm to immediately remind the user of short-distance fault.
The above-mentioned preferred embodiments of the present invention are not intended to limit the present invention, and any modifications made within the spirit and principles of the present invention, equivalent to the modifications of an intelligent household power supply, should be included within the scope of the present invention.
Claims (8)
1. The intelligent household power supply comprises a main control unit, and a power input unit and a power output unit which are respectively electrically connected with the main control unit, wherein the power input unit comprises an input protection ground, and the power output unit comprises an output protection ground; the circuit is characterized by further comprising a switch circuit, a trigger circuit and a resistance circuit, wherein the trigger circuit is electrically connected with an enabling end of the switch circuit, and the resistance circuit is electrically connected with the main control unit;
the resistance circuit is connected in series between the input protection ground and the output protection ground;
the switch circuit is connected between the input protection ground and the resistance circuit in series, or the switch circuit is connected between the output protection ground and the resistance circuit in series;
the trigger circuit acts to enable the switch circuit, the resistor circuit and the input protection ground are switched on and switched off, or the resistor circuit and the output protection ground are switched on and switched off, so that the resistor circuit collects the voltages of the input protection ground and the output protection ground and transmits the voltages to the main control unit, and the main control unit is used for controlling the power output unit to be switched on and switched off according to the received voltage.
2. The intelligent household power supply of claim 1, further comprising an alarm unit electrically connected to the master control unit.
3. The intelligent home power supply of claim 1, wherein the trigger circuit comprises a manipulation button.
4. The intelligent household power supply of claim 1, wherein the trigger circuit comprises an and timing unit.
5. The intelligent household power supply of claim 1, wherein the resistance circuit comprises a sense resistor connected in series between the input protection ground and the output protection ground.
6. The intelligent household power supply of claim 2, wherein the alarm unit comprises a speaker.
7. The intelligent household power supply according to any one of claims 1 to 6, further comprising a rectifying and filtering unit, a high-frequency inverting unit, a high-frequency isolating unit, a high-frequency rectifying and filtering unit and a low-frequency inverting and filtering unit which are electrically connected in sequence;
the rectification filtering unit is electrically connected with the power input unit;
the low-frequency inversion filtering unit is electrically connected with the power output unit;
the high-frequency inversion unit and the low-frequency inversion filtering unit are respectively electrically connected with the main control unit.
8. The intelligent household power supply of claim 7, wherein the high frequency isolation unit comprises a 26KHz isolation transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022635425.3U CN213484762U (en) | 2020-11-13 | 2020-11-13 | Intelligent household power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022635425.3U CN213484762U (en) | 2020-11-13 | 2020-11-13 | Intelligent household power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213484762U true CN213484762U (en) | 2021-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022635425.3U Active CN213484762U (en) | 2020-11-13 | 2020-11-13 | Intelligent household power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213484762U (en) |
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2020
- 2020-11-13 CN CN202022635425.3U patent/CN213484762U/en active Active
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