Doorbell AC power supply control circuit
By designing an AC power control circuit for a doorbell, the problems of power management, security, compatibility, and line loss in existing doorbell systems were solved, achieving rapid response, improved security, and extended battery life.
Patent Information
- Application Number
- CN202423186235.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing doorbell systems have deficiencies in power management, especially in the case of low battery conditions where they cannot maintain normal operation, lack security, rely on software which increases system complexity, and suffer from high line loss and poor compatibility.
A doorbell AC power control circuit was designed, including a power interface, an AC to DC conversion circuit, a voltage conversion circuit, and a control circuit. It integrates short-circuit control and doorbell detection control, and has overcurrent, overvoltage, and short-circuit protection. It supports compatibility with different types of doorbells and optimizes power management to reduce line losses.
It achieves rapid response, improves system security and compatibility, reduces line loss, extends battery life, and ensures stable operation under low power conditions.
Smart Images
Figure CN223872187U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of doorbell technology, and in particular to a doorbell AC power supply control circuit. Background Technology
[0002] In modern home security systems, doorbells, as a fundamental communication tool, directly impact user experience and security through their design and functionality. However, in-depth analysis of existing doorbell systems reveals several key design and implementation issues that limit their performance and reliability.
[0003] Residual voltage issue: Existing doorbell systems have deficiencies in power management, especially under low battery conditions. Due to the lack of effective power optimization design, when the battery level drops to a certain point, the system cannot maintain normal operation, causing the doorbell to fail to respond at critical moments, thus reducing its practicality and reliability.
[0004] Insufficient safety: In terms of safety performance, existing doorbell systems may not adequately consider electrical safety requirements. For example, the lack of key safety features such as overcurrent, overvoltage, and short-circuit protection may cause the system to not only malfunction under abnormal operating conditions but also potentially lead to safety accidents such as fires or electric shocks.
[0005] Software Dependency: The control logic of existing doorbell systems relies too heavily on software, which not only increases system complexity but also limits the independent control capabilities of the hardware. When software problems arise or updates are needed, the doorbell system may malfunction, resulting in additional maintenance costs and inconvenience for users.
[0006] Line loss issue: Existing doorbell systems have high line loss during power transmission, which not only reduces energy efficiency but may also lead to performance degradation when transmitting power over long distances.
[0007] Compatibility issues: Existing doorbell systems may not adequately consider compatibility with different types of doorbells (such as mechanical chimes and electronic chimes), limiting user choice and system flexibility. Utility Model Content
[0008] To address the problems existing in the prior art, this utility model provides a doorbell AC power control circuit.
[0009] To achieve the above objectives, the technical solution of this utility model is as follows:
[0010] This utility model provides a doorbell AC power supply control circuit, including:
[0011] Power interface, AC to DC conversion circuit, voltage conversion circuit, control circuit;
[0012] The corresponding terminals of the power interface are electrically connected to the corresponding terminals of the control circuit and the AC to DC circuit, respectively.
[0013] The corresponding terminals of the AC to DC converter circuit and the corresponding terminals of the voltage conversion circuit are electrically connected;
[0014] The control circuit includes a short-circuit control circuit and a doorbell detection control circuit; the corresponding terminals of the short-circuit control circuit are electrically connected to the power interface and the corresponding terminals of the doorbell detection control circuit, respectively.
[0015] Among them, the AC to DC circuit is used to convert the AC power input from the power interface into DC power.
[0016] A voltage conversion circuit is used to convert the input high voltage to low voltage to power subsequent circuits;
[0017] The doorbell detection control circuit is used to detect when the doorbell is pressed from the outside.
[0018] Preferably, the power interface is used to connect to AC power, high-voltage DC power, low-voltage DC power, or solar panel power.
[0019] Preferably, the AC to DC circuit includes a fuse F1, a rectifier diode VD1, a diode ESD1, a capacitor C7, a capacitor C8, and a capacitor C9.
[0020] The first end of the fuse F1 is connected to the positive input terminal of the power interface, the second end of the fuse F1 is electrically connected to the first pin of the rectifier diode VD1, the second pin of the rectifier diode VD1 is connected to the negative input terminal of the power interface, the third pin of the rectifier diode VD1 is electrically connected to the first terminals of diode ESD1, capacitor C7, capacitor C8, and capacitor C9 respectively, and the fourth pin of the rectifier diode VD1 is electrically connected to the second terminals of diode ESD1, capacitor C7, capacitor C8, and capacitor C9 respectively.
[0021] Preferably, the voltage conversion circuit includes capacitors C1, C2, C3, C4, C5, C6, C11, voltage conversion chip U1, inductor L1, resistors R2, R4, R5, R6, diode D1, and diode D6.
[0022] The first pin of the voltage conversion chip U1 is electrically connected to the first end of capacitor C1, diode D1, and inductor L1 respectively; the second end of capacitor C1 is electrically connected to the eighth pin of voltage conversion chip U1; and the second end of diode D1 is grounded. The second end of inductor L1 is electrically connected to the first end of capacitor C2, capacitor C3, capacitor C4, and resistor R2 respectively.
[0023] The fourth pin of the voltage conversion chip U1 is electrically connected to the first end of resistor R5 and the second end of resistor R2, respectively, and the second end of resistor R5 is grounded.
[0024] The third pin of the voltage conversion chip U1 is electrically connected to the first end of the resistor R6.
[0025] The 7th pin of the voltage conversion chip U1 is electrically connected to the first terminals of capacitors C6 and C5, respectively, and the second terminals of capacitors C6 and C5 are both grounded; the 6th pin of the voltage conversion chip U1 is grounded through resistor R4.
[0026] The second pin of the voltage conversion chip U1 is electrically connected to the first terminal of diode D6, capacitor C11, and resistor R3 respectively; the second terminal of capacitor C11 is electrically connected to the second terminal of resistor R3 and grounded.
[0027] Preferably, the voltage conversion chip U1 is model JW5121.
[0028] Preferably, the short-circuit control circuit includes diode D2, diode D4, diode D3, resistor R8, resistor R10, switch chip U2, capacitor C15, capacitor C14, and relay J1;
[0029] The third pin of the switch chip U2 is electrically connected to the first terminals of resistors R8 and R10 respectively; the second terminal of resistor R8 is electrically connected to the first terminals of diodes D2 and D4 respectively; the second terminal of resistor R10 is grounded; and the second terminal of diode D4 is electrically connected to the corresponding terminal of the doorbell detection and control circuit.
[0030] Pin 4 of the switch chip U2 is grounded via capacitor C15.
[0031] The fifth pin of the switch chip U2 is electrically connected to the first end of capacitor C14, the first end of diode D3, and the first pin of relay J1, respectively; the second end of capacitor C14 is electrically connected to the second end of diode D3 and the fourth pin of relay J1, respectively; and the second and fourth pins of relay J1 are electrically connected to the positive and negative input terminals of the power interface, respectively.
[0032] Preferably, the switch chip U2 is a TMI6220.
[0033] Preferably, the doorbell detection and control circuit includes a capacitor C16, a resistor R9, a diode D5, and a push-button switch SW1; one end of the push-button switch SW1 is electrically connected to the first end of the diode D5 and the resistor R9 respectively, the second end of the diode D5 is grounded, the second end of the resistor R9 is electrically connected to one end of the capacitor C16 and the second end of the diode D4, and the capacitor C16 is grounded.
[0034] The technical solution of this utility model has the following beneficial effects:
[0035] This solution uses a fast short-circuit control circuit to ensure that the system can respond quickly after the user presses the electronic doorbell, and promptly connect the power supply to the mechanical or electronic doorbell to achieve rapid sound output.
[0036] This invention is designed to be compatible with different types of doorbells (mechanical and electronic), providing users with more flexible options and enhancing the system's applicability.
[0037] This solution integrates safety features such as overcurrent, overvoltage, and short-circuit protection in its circuit design, effectively preventing electrical faults and safety accidents and improving the safety of the doorbell system.
[0038] By optimizing power management and circuit design, this invention significantly reduces line losses, improves energy utilization efficiency, enables the doorbell system to operate stably even with low battery levels, and extends battery life. Attached Figure Description
[0039] Figure 1 This is a control block diagram of the present invention;
[0040] Figure 2 This is the circuit diagram of the AC to DC converter of this utility model;
[0041] Figure 3 This is a circuit diagram of the voltage conversion circuit of this utility model;
[0042] Figure 4 This is a circuit diagram of the control circuit of this utility model;
[0043] Figure 5 This is an application block diagram for the present invention to be used in current scenarios. Detailed Implementation
[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0049] Reference Figures 1 to 5This utility model provides a doorbell AC power control circuit, including:
[0050] Power interface 100, AC to DC circuit 200, voltage conversion circuit 300, control circuit 400;
[0051] The corresponding terminals of the power interface are electrically connected to the corresponding terminals of the control circuit 400 and the AC to DC circuit 200, respectively.
[0052] The corresponding terminal of the AC to DC circuit 200 is electrically connected to the corresponding terminal of the voltage conversion circuit 300;
[0053] The control circuit 400 includes a short-circuit control circuit 401 and a doorbell detection control circuit 402; the corresponding terminals of the short-circuit control circuit 401 are electrically connected to the power interface 100 and the corresponding terminals of the doorbell detection control circuit 402, respectively.
[0054] Among them, the AC to DC circuit 200 is used to convert the AC power input to the power interface 200 into DC power.
[0055] The voltage conversion circuit 300 is used to convert the input high voltage to low voltage to power the subsequent circuits;
[0056] The doorbell detection control circuit 402 is used to detect the pressing of the doorbell from the outside.
[0057] Furthermore, the power interface 100 is used to connect to AC power, high-voltage DC power, low-voltage DC power, or solar panel power.
[0058] Furthermore, the AC to DC circuit 200 includes a fuse F1, a rectifier diode VD1, a diode ESD1, a capacitor C7, a capacitor C8, and a capacitor C9.
[0059] The first end of the fuse F1 is connected to the positive input terminal of the power interface, the second end of the fuse F1 is electrically connected to the first pin of the rectifier diode VD1, the second pin of the rectifier diode VD1 is connected to the negative input terminal of the power interface, the third pin of the rectifier diode VD1 is electrically connected to the first terminals of diode ESD1, capacitor C7, capacitor C8, and capacitor C9 respectively, and the fourth pin of the rectifier diode VD1 is electrically connected to the second terminals of diode ESD1, capacitor C7, capacitor C8, and capacitor C9 respectively.
[0060] In this embodiment, the AC-to-DC circuit 200 uses a rectifier diode VD1 (model TB310S) to convert the input AC power into a stable DC power supply. Then, the input voltage is stabilized by a capacitor at the back end, providing stable voltage and current for subsequent circuits. The voltage and current parameters that this circuit can provide are as follows:
[0061] pass It is deduced that when the voltage is 12V / 60HZ AC, it can output a current of 710mA.
[0062] It can output 475mA of current when the voltage is 8V / 60HZ AC.
[0063] Furthermore, the voltage conversion circuit 300 includes capacitors C1, C2, C3, C4, C5, C6, C11, voltage conversion chip U1, inductor L1, resistors R2, R4, R5, R6, diode D1, and diode D6.
[0064] The first pin of the voltage conversion chip U1 is electrically connected to the first terminals of capacitor C1, diode D1, and inductor L1, respectively. The second terminal of capacitor C1 is electrically connected to the eighth pin of the voltage conversion chip U1, and the second terminal of diode D1 is grounded. The second terminal of inductor L1 is electrically connected to the first terminals of capacitors C2, C3, C4, and resistor R2, respectively. The fourth pin of the voltage conversion chip U1 is electrically connected to the first terminal of resistor R5 and the second terminal of resistor R2, respectively, and the second terminal of resistor R5 is grounded. The third pin of the voltage conversion chip U1 is electrically connected to the first terminal of resistor R6. The seventh pin of the voltage conversion chip U1 is electrically connected to the first terminals of capacitors C6 and C5, respectively, and the second terminals of capacitors C6 and C5 are both grounded. The sixth pin of the voltage conversion chip U1 is grounded through resistor R4. The second pin of the voltage conversion chip U1 is electrically connected to the first terminals of diode D6, capacitor C11, and resistor R3, respectively. The second terminal of capacitor C11 is electrically connected to the second terminal of resistor R3 and grounded. The voltage conversion chip U1 is model JW5121; in this embodiment, the voltage conversion circuit 300 is used to convert the input high voltage DC power supply into low voltage 5V power to power the subsequent system.
[0065] Furthermore, the short-circuit control circuit 402 includes diodes D2, D4, and D3, resistors R8 and R10, a switching chip U2, capacitors C15 and C14, and a relay J1. The third pin of the switching chip U2 is electrically connected to the first terminals of resistors R8 and R10. The second terminal of resistor R8 is electrically connected to the first terminals of diodes D2 and D4. The second terminal of resistor R10 is grounded, and the second terminal of diode D4 is electrically connected to the corresponding terminal of the doorbell detection control circuit. The fourth pin of the switching chip U2 is grounded via capacitor C15. The fifth pin of the switching chip U2 is electrically connected to the first terminal of capacitor C14, the first terminal of diode D3, and the first pin of relay J1. The second terminal of capacitor C14 is electrically connected to the second terminal of diode D3 and the fourth pin of relay J1. The second and fourth pins of relay J1 are electrically connected to the positive and negative input terminals of the power interface, respectively. The switching chip U2 is a TMI6220.
[0066] In this embodiment, the short-circuit control circuit 402 uses U2 (model TMI6220) and J1 (model HF33F / 005-HSL3F relay) to form a switching device. It mainly realizes the functions of open circuit and short circuit AC+ and AC-, controlling the circuit's on / off state by controlling the switch chip U2 and the relay J1.
[0067] Furthermore, the doorbell detection and control circuit 402 includes a capacitor C16, a resistor R9, a diode D5, and a push-button switch SW1. One end of the push-button switch SW1 is electrically connected to the first ends of the diode D5 and the resistor R9, respectively. The second end of the diode D5 is grounded. The second end of the resistor R9 is electrically connected to one end of the capacitor C16 and the second end of the diode D4. The capacitor C16 is grounded. In this embodiment, the doorbell detection and control circuit 402 realizes the functions of external pressure detection and short-circuit control. When SW1 is pressed, the KEY_CONTROL signal becomes high, triggering the short-circuit control circuit.
[0068] The working principle of this utility model is as follows:
[0069] When the push-button switch SW1 is not pressed, the KEY_CONTROL signal is low due to the pull-down effect of resistor R10. At this time, the EN pin of switch chip U2 is also low, preventing switch chip U2 from turning on and thus preventing the +5V_BAT power supply from reaching pins 2 and 4 of relay J1. Relay J1 will then be in the off state. Meanwhile, with the KEY_CONTROL signal low, the controller sets AC_Control low and AC_Control2 high. This converts the AC power supply to 5V via voltage conversion chip U1 to supply power to the subsequent system. At this time, the entire external AC power supply only powers the system; the circuit will not power the mechanical or electronic chime, rendering the mechanical or electronic chime unusable.
[0070] When the push-button switch SW1 is pressed, the KEY_CONTROL signal is high because SW1 is connected to power. At this time, the EN pin of the switch chip U2 is also high, turning on U2 and supplying +5V_BAT power to pins 2 and 4 of relay J1, causing relay J1 to short-circuit. Meanwhile, with the KEY_CONTROL signal high, the controller sets AC_Control high, AC_Control2 low, and AC_Control high, thus preventing AC power from reaching the downstream system. In this state, the external AC power supply only powers the external system, and the circuit powers either the mechanical or electronic chime, enabling the mechanical or electronic chime to function and produce a ding-dong sound.
[0071] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A doorbell AC power supply control circuit, characterized by, The application relates to a power supply interface, an AC-to-DC circuit, a voltage conversion circuit and a control circuit. The power supply interface is electrically connected to the control circuit and the AC-to-DC circuit. The AC-to-DC circuit is electrically connected to the voltage conversion circuit. The control circuit comprises a short-circuit control circuit and a doorbell detection control circuit. The AC-to-DC circuit is used for converting the input AC power supply of the power supply interface into DC power supply. The voltage conversion circuit is used for converting the input high-voltage power supply into low-voltage power supply for the power supply of the subsequent circuit. The doorbell detection control circuit is used for realizing the external doorbell pressing detection. The power supply interface is used for connecting the AC power supply, the high-voltage DC power supply, the low-voltage DC power supply or the solar panel power supply.
2. The doorbell AC power supply control circuit of claim 1, wherein, The AC-to-DC circuit comprises a fuse F1, a rectifier diode VD1, a diode ESD1, capacitors C7, C8 and C9.
3. The doorbell AC power supply control circuit of claim 1, wherein, The first end of the fuse F1 is connected to the positive input end of the power supply interface, the second end of the fuse F1 is electrically connected to the first pin of the rectifier diode VD1, the second pin of the rectifier diode VD1 is connected to the negative input end of the power supply interface, the third pin of the rectifier diode VD1 is electrically connected to the first ends of the diode ESD1, the capacitors C7, C8 and C9, the fourth pin of the rectifier diode VD1 is electrically connected to the second ends of the diode ESD1, the capacitors C7, C8 and C9. The voltage conversion circuit comprises capacitors C1, C2, C3, C4, C5, C6, C11, a voltage conversion chip U1, an inductor L1, resistors R2, R4, R5, R6, diodes D1 and D6.
4. The doorbell AC power supply control circuit of claim 1, wherein, The first pin of the voltage conversion chip U1 is electrically connected to the first end of the inductor L1, the first pin of the diode D1 and the capacitor C1, the second end of the capacitor C1 is electrically connected to the eighth pin of the voltage conversion chip U1, the second end of the diode D1 is grounded, the second end of the inductor L1 is electrically connected to the first ends of the capacitors C2, C3, C4 and the resistor R2. The fourth pin of the voltage conversion chip U1 is electrically connected to the first end of the resistor R5 and the second end of the resistor R2, the second end of the resistor R5 is grounded. The third pin of the voltage conversion chip U1 is electrically connected to the first end of the resistor R6. The seventh pin of the voltage conversion chip U1 is electrically connected to the first ends of the capacitors C6 and C5, the second ends of the capacitors C6 and C5 are grounded, the sixth pin of the voltage conversion chip U1 is grounded through the resistor R4. The second pin of the voltage conversion chip U1 is electrically connected to the first end of the resistor R3, the second end of the capacitor C11 and the diode D6, the second end of the capacitor C11 is electrically connected to the second end of the resistor R3 and grounded. The model of the voltage conversion chip U1 is JW5121.
5. The doorbell AC power supply control circuit of claim 4, wherein, 6. The doorbell AC power supply control circuit of claim 1, wherein, The short-circuit control circuit includes diode D2, diode D4, diode D3, resistor R8, resistor R10, switch chip U2, capacitor C15, capacitor C14, and relay J1; The third pin of the switch chip U2 is electrically connected to the first terminals of resistors R8 and R10 respectively; the second terminal of resistor R8 is electrically connected to the first terminals of diodes D2 and D4 respectively; the second terminal of resistor R10 is grounded; and the second terminal of diode D4 is electrically connected to the corresponding terminal of the doorbell detection and control circuit. Pin 4 of the switch chip U2 is grounded via capacitor C15. The fifth pin of the switch chip U2 is electrically connected to the first end of capacitor C14, the first end of diode D3, and the first pin of relay J1, respectively; the second end of capacitor C14 is electrically connected to the second end of diode D3 and the fourth pin of relay J1, respectively; and the second and fourth pins of relay J1 are electrically connected to the positive and negative input terminals of the power interface, respectively.
7. The doorbell AC power supply control circuit of claim 6, wherein, The switch chip U2 is model TMI6220.
8. The doorbell AC power supply control circuit of claim 6, wherein, The doorbell detection and control circuit includes a capacitor C16, a resistor R9, a diode D5, and a push-button switch SW1. One end of the push-button switch SW1 is electrically connected to the first end of the diode D5 and the resistor R9, respectively. The second end of the diode D5 is grounded. The second end of the resistor R9 is electrically connected to one end of the capacitor C16 and the second end of the diode D4. The capacitor C16 is grounded.