Detection circuit and leakage protector
By designing a detection circuit in the leakage protector and using the cooperation of the indicator light unit and the control unit, the problem that the existing leakage protector cannot prompt the user in time when the leakage function fails, and timely detection and prompting of internal component failures of the leakage protector is achieved, and the safety of the user is improved.
Patent Information
- Application Number
- CN202421138759.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-05-23
AI Technical Summary
When the leakage function of the existing leakage protector fails, the indicator light is still on, which makes it impossible for the user to identify the internal components of the leakage protector in time, which poses a potential leakage risk to electrical equipment and affects the user's personal safety.
A detection circuit is designed, including an indicator light unit, a unit to be detected and a control unit. The control unit regularly sends a detection signal to the unit to be detected, and controls the first transistor to be always on or flicker according to the detection signal, prompting the user to the working state of the internal electrical components of the leakage protector.
Through the use of the detection circuit, users can promptly determine whether the important electrical components inside the leakage protector are working normally, so as to avoid the leakage protector affecting the electrical equipment and users when the leakage protector loses its leakage function.
Smart Images
Figure CN222748651U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, in particular to a detection circuit and a leakage protector. Background Art
[0002] At present, an indicator light is usually provided in the leakage protector. When the leakage protector is powered on and working normally, the indicator light is always on, reminding the user that the leakage protector is powered on normally. When the leakage function of the leakage protector fails, since the leakage protector can still be powered on normally, the indicator light is still always on. Although the indicator light of the leakage protector is always on, it has actually lost its leakage protection function, causing leakage hazards to the electrical equipment connected to the circuit breaker, thereby affecting the personal safety of the user.
[0003] The above information disclosed in the Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may include information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention
[0004] The utility model provides a detection circuit which can detect and prompt whether an important component inside a current leakage protector fails.
[0005] In a first aspect, the present disclosure provides a detection circuit, comprising:
[0006] The indicator light unit comprises a first transistor and a first resistor connected in series, one end of the first resistor is connected to a first node, the other end is connected to a first electrode of the first transistor, and a second electrode of the first transistor is grounded;
[0007] The unit to be detected includes a mutual inductor circuit, a thyristor circuit and an integrated circuit arranged in the leakage protector;
[0008] The control unit is provided with a first pin, the first pin is connected to the first node, the control unit sends a detection signal to the unit to be detected through the first pin at a regular time, and controls the first transistor to be always on or flash according to the detection signal.
[0009] In an exemplary embodiment of the present disclosure, the mutual inductor circuit includes a second resistor, a second transistor, a third resistor, and a mutual inductor;
[0010] The first electrode of the second transistor is connected to the mutual inductor, the second electrode of the second transistor is grounded, the base of the second transistor is connected to the first node, the second resistor is located between the first node and the base of the second transistor, and the third resistor is located between the first electrode of the second transistor and the mutual inductor.
[0011] In an exemplary embodiment of the present disclosure, the first transistor is a light emitting diode, and the second transistor is a triode;
[0012] The first electrode of the first transistor is a positive electrode, and the second electrode is a negative electrode.
[0013] In an exemplary embodiment of the present disclosure, the thyristor circuit includes a thyristor and a third transistor connected in series, a first electrode of the third transistor is connected to a second node, and a second electrode of the second transistor is connected to the thyristor;
[0014] The control unit is further provided with a second pin, the second pin is connected to the second node, and the control unit sends a detection signal to the thyristor regularly through the second pin.
[0015] In an exemplary embodiment of the present disclosure, the third transistor is a diode.
[0016] In an exemplary embodiment of the present disclosure, the first pole of the third transistor is a positive pole, and the second pole is a negative pole.
[0017] In an exemplary embodiment of the present disclosure, the integrated circuit includes a fourth resistor, a fifth resistor, and a main control circuit, one end of the fourth resistor is connected to a third node, the other end of the fourth resistor is connected to a fourth node, one end of the fifth resistor is connected to the fourth node, the other end of the fifth resistor is grounded, and the integrated circuit is connected to the third node;
[0018] The control unit is further provided with a third pin, the third pin is connected to the fourth node, and the control unit sends a detection signal to the main control circuit through the third pin at a regular interval.
[0019] In an exemplary embodiment of the present disclosure, it further includes:
[0020] The timing adjustment unit includes a sixth resistor and a capacitor, one end of the sixth resistor is connected to the fifth node, the other end of the sixth resistor is connected to the second node, one end of the capacitor is connected to the second node, and the other end of the capacitor is grounded.
[0021] In an exemplary embodiment of the present disclosure, the control unit is further provided with a fourth pin and a fifth pin, the fourth pin is connected to the output end of the power supply, and the fifth pin is grounded.
[0022] A second aspect of the present disclosure provides a leakage protector, comprising the above-mentioned detection circuit.
[0023] Beneficial effects:
[0024] According to the detection circuit of the leakage protector in the present disclosure, the indicator light unit is provided with a first transistor and a first resistor connected in series, the first resistor is used to provide an operating voltage to the first transistor, and the first transistor can prompt the user of the working state of the electrical components inside the leakage protector by flashing or being always on. When the control unit sends a detection signal to the unit to be detected through the first pin at a fixed time, if none of the components in the unit to be detected fails, the control unit controls the first transistor to be in a timed flashing state. If any one of the units to be detected fails, the control unit controls the first transistor to be always on. In this way, after the first transistor sends a always-on or flashing information, it can detect and prompt whether the important components inside the current leakage protector have failed, and the user can promptly judge whether the important electrical components inside the current leakage protector are working normally, so as to avoid the leakage protector from affecting electrical equipment and users when the leakage protector loses its leakage function. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0026] Figure 1 It is a structural schematic diagram of a detection circuit according to an embodiment of the present disclosure.
[0027] Figure 2 It is a structural schematic diagram of another detection circuit according to an embodiment of the present disclosure.
[0028] Description of reference numerals:
[0029] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; A, first node; B, second node; C, third node; D, fourth node; E, fifth node; IO1, first pin; IO2, second pin; IO3, third pin; IO4, fourth pin; IO5, fifth pin; IC1, control unit; IC2, main control circuit; L1, mutual inductor; SCR, thyristor; C1, capacitor; D1, first transistor; Q1, second transistor; D2, third transistor. DETAILED DESCRIPTION
[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure.
[0031] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the main technical ideas of the present disclosure.
[0032] When a structure is “on” another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is “directly” disposed on the other structure, or that the structure is “indirectly” disposed on the other structure via another structure.
[0033] The terms "a", "an", "the" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusive meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. The terms "first" and "second" etc. are used only as labels and are not intended to limit the quantity of their objects.
[0034] At present, an indicator light is usually provided in the leakage protector. When the leakage protector is powered on and working normally, the indicator light is always on, reminding the user that the leakage protector is powered on normally. When the leakage function of the leakage protector fails, since the leakage protector can still be powered on normally, the indicator light is still always on. Although the indicator light of the leakage protector is always on, it has actually lost its leakage protection function, causing leakage hazards to the electrical equipment connected to the circuit breaker, thereby affecting the personal safety of the user.
[0035] In an embodiment of the present disclosure, a detection circuit of a leakage protector is provided. Figure 1-2As shown, it includes an indicator light unit, a mutual inductance detection unit and a control unit IC1. Among them, the indicator light unit may include a first transistor D1 and a first resistor R1 connected in series, one end of the first resistor R1 is connected to the first node A, and the other end is connected to the first electrode of the first transistor D1, and the second electrode of the first transistor D1 is grounded. The unit to be detected includes a mutual inductor circuit, a thyristor circuit and an integrated circuit arranged in the leakage protector. The control unit IC1 may be provided with a first pin IO1, the first pin IO1 is connected to the first node A, and the control unit IC1 periodically sends a detection signal to the unit to be detected through the first pin IO1, and controls the first transistor D1 to be always on or flash according to the detection signal.
[0036] According to the detection circuit of the leakage protector in the present disclosure, the indicator light unit is provided with a first transistor D1 and a first resistor R1 connected in series, and the first resistor R1 is used to provide an operating voltage to the first transistor D1, and the first transistor D1 can prompt the user of the working state of the electrical components inside the leakage protector by flashing or being always on. When the control unit IC1 sends a detection signal to the unit to be detected through the first pin IO1 at a regular time, if none of the components in the unit to be detected fails, the control unit IC1 controls the first transistor D1 to be in a timed flashing state. If any one of the units to be detected fails, the control unit IC1 controls the first transistor D1 to be always on. In this way, after the first transistor D1 sends a always-on or flashing information, it can detect and prompt whether the important components inside the current leakage protector have failed, and the user can promptly judge whether the important electrical components inside the current leakage protector are working normally, so as to avoid the leakage protector from affecting the electrical equipment and users when the leakage function is lost.
[0037] The following is a detailed description of the components of the detection circuit of the leakage protector provided in the embodiment of the present disclosure:
[0038] In one embodiment of the present disclosure, the mutual inductor circuit includes a second resistor R2, a second transistor, a third resistor R3, and a mutual inductor L1. The first electrode of the second transistor is connected to the mutual inductor L1, the second electrode of the second transistor is grounded, the base of the second transistor is connected to the first node A, the second resistor R2 is located between the first node A and the base of the second transistor, and the third resistor R3 is located between the first electrode of the second transistor and the mutual inductor L1. Specifically, the control unit IC1 can send a detection signal to the mutual inductor L1 in the mutual inductor circuit. If the mutual inductor L1 fails, the first transistor D1 is controlled to change from timed flashing to constant light. The user is prompted that a fault has occurred inside the leakage protector. If the mutual inductor L1 does not fail, the first transistor D1 is controlled to be in a timed flashing state.
[0039] Optionally, the first transistor D1 is a light emitting diode, and the second transistor is a triode. The first electrode of the first transistor D1 is a positive electrode, and the second electrode is a negative electrode. It can be understood that the diode has the functions of forward conduction and reverse cutoff, that is, the current flows from the positive electrode to the negative electrode of the first transistor D1 as forward conduction, and vice versa as reverse cutoff.
[0040] In one embodiment of the present disclosure, the unit to be detected also includes a thyristor circuit, which includes a thyristor SCR and a third transistor D2 connected in series, the first electrode of the third transistor D2 is connected to the second node B, and the second electrode of the second transistor is connected to the thyristor SCR. The control unit IC1 is also provided with a second pin IO2, the second pin IO2 is connected to the second node B, and the control unit IC1 sends a detection signal to the thyristor SCR through the second pin IO2 at a regular interval. If the thyristor SCR fails, the control unit IC1 controls the first transistor D1 to change from a timed flashing state to a constant light state, prompting the user that there is a fault inside the leakage protector. If the thyristor SCR does not fail, the first transistor D1 is controlled to be in a timed flashing state.
[0041] Optionally, the third transistor D2 is a diode, wherein the first electrode of the third transistor D2 is a positive electrode, and the second electrode is a negative electrode.
[0042] In one embodiment of the present disclosure, the unit to be detected also includes an integrated circuit, the integrated circuit includes a fourth resistor R4, a fifth resistor R5, and a main control circuit IC2, one end of the fourth resistor R4 is connected to a third node C, the other end of the fourth resistor R4 is connected to a fourth node D, one end of the fifth resistor R5 is connected to the fourth node D, the other end of the fifth resistor R5 is grounded, and the integrated circuit is connected to the third node C. The control unit IC1 is also provided with a third pin IO3, the third pin IO3 is connected to the fourth node D, and the control unit IC1 sends a detection signal to the main control circuit IC2 through the third pin IO3 at regular intervals. Specifically, when the main control circuit IC2 in the integrated circuit fails, the control unit IC1 controls the first transistor D1 to change from a timed flashing state to a constantly lit state, prompting the user that a fault occurs inside the leakage protector. If the main control circuit IC2 in the integrated circuit does not fail, the control unit IC1 controls the first transistor D1 to be in a timed flashing state.
[0043] In one embodiment of the present disclosure, the detection circuit also includes a timing adjustment unit, which may include a sixth resistor R6 and a capacitor C1, one end of the sixth resistor R6 is connected to a fifth node E, the other end of the sixth resistor R6 is connected to a second node B, one end of the capacitor C1 is connected to the second node B, and the other end of the capacitor C1 is grounded. The timing adjustment unit is used to adjust the timing flashing time of the first transistor D1 by the resistance value of the sixth resistor R6 to remind the user. For example, the timing flashing time may be once per second or once per five seconds, and the present disclosure does not make any special limitation here. Those skilled in the art may set the corresponding timing flashing time according to different actual needs.
[0044] It should be noted that the control unit IC1 sends a detection signal to the unit to be detected at a fixed time, where the timing means sending a detection signal to the unit to be detected at a fixed time interval. For example, the control unit IC1 may send a detection signal to the unit to be detected once every five seconds. Of course, it may also be other time periods, and the present disclosure does not make any special limitation here.
[0045] In an embodiment of the present disclosure, the control unit IC1 is further provided with a fourth pin IO4 and a fifth pin IO5. The fourth pin IO4 is connected to the output end of the power supply for supplying power to the control unit IC1, and the fifth pin IO5 is grounded.
[0046] A leakage protector is also provided in an embodiment of the present disclosure. The leakage protector includes the above-mentioned detection circuit.
[0047] It should be noted that, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in the specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc., which shall all be considered as part of the present disclosure.
[0048] It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The present disclosure can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.
Claims
1. A detection circuit, characterized in that: include: The indicator light unit comprises a first transistor and a first resistor connected in series, one end of the first resistor is connected to a first node, the other end is connected to a first electrode of the first transistor, and a second electrode of the first transistor is grounded; The unit to be detected includes a mutual inductor circuit, a thyristor circuit and an integrated circuit arranged in the leakage protector; The control unit is provided with a first pin, the first pin is connected to the first node, the control unit sends a detection signal to the unit to be detected through the first pin at a regular time, and controls the first transistor to be always on or flash according to the detection signal.
2. The detection circuit according to claim 1, characterized in that: The mutual inductor circuit includes a second resistor, a second transistor, a third resistor, and a mutual inductor; The first electrode of the second transistor is connected to the mutual inductor, the second electrode of the second transistor is grounded, the base of the second transistor is connected to the first node, the second resistor is located between the first node and the base of the second transistor, and the third resistor is located between the first electrode of the second transistor and the mutual inductor.
3. The detection circuit according to claim 2, characterized in that: The first transistor is a light emitting diode, and the second transistor is a triode; The first electrode of the first transistor is a positive electrode, and the second electrode is a negative electrode.
4. The detection circuit according to claim 2, characterized in that: The thyristor circuit comprises a thyristor and a third transistor connected in series, a first electrode of the third transistor is connected to a second node, and a second electrode of the second transistor is connected to the thyristor; The control unit is further provided with a second pin, the second pin is connected to the second node, and the control unit sends a detection signal to the thyristor regularly through the second pin.
5. The detection circuit according to claim 4, characterized in that: The third transistor is a diode.
6. The detection circuit according to claim 4, characterized in that: The first electrode of the third transistor is a positive electrode, and the second electrode is a negative electrode.
7. The detection circuit according to claim 1, characterized in that: The integrated circuit comprises a fourth resistor, a fifth resistor, and a main control circuit, one end of the fourth resistor is connected to a third node, the other end of the fourth resistor is connected to a fourth node, one end of the fifth resistor is connected to the fourth node, the other end of the fifth resistor is grounded, and the integrated circuit is connected to the third node; The control unit is further provided with a third pin, the third pin is connected to the fourth node, and the control unit sends a detection signal to the main control circuit through the third pin at a regular interval.
8. The detection circuit according to claim 4, characterized in that: Also includes: The timing adjustment unit includes a sixth resistor and a capacitor, one end of the sixth resistor is connected to the fifth node, the other end of the sixth resistor is connected to the second node, one end of the capacitor is connected to the second node, and the other end of the capacitor is grounded.
9. The detection circuit according to claim 1, characterized in that: The control unit is further provided with a fourth pin and a fifth pin, the fourth pin is connected to the output end of the power supply, and the fifth pin is grounded.
10. A leakage protector, characterized in that: Comprising the detection circuit as described in any one of claims 1-9.