Single-live-wire electricity-taking circuit and smart home system

Abstract

The utility model discloses a single-live-wire electricity-taking circuit and an intelligent household system, the single-live-wire electricity-taking circuit comprises a main circuit and a control circuit, the main circuit comprises an electricity-taking switch, an electricity-taking loop and a current stabilizer, the switch end of the electricity-taking switch is connected in series in a power supply loop of a commercial power load; the power taking loop is connected in parallel to the two ends of the switch end of the power taking switch, a current stabilizing switch is arranged in the current stabilizer, the current stabilizer is connected in parallel to the two ends of the mains supply load, and on-off of the current stabilizer is controlled through the current stabilizing switch; the control circuit comprises a control module and a control switch, the control switch is connected in series between the commercial power load and the switch end of the power taking switch, and the control module controls the control switch and the current stabilization switch to be interlocked, so that the control switch can be switched off and the current stabilization switch can be switched on at the moment that the current stabilizer is powered on; the impedance problem of the load does not need to be considered, the current passes through the current stabilization module, the current stabilization module works normally, and the spanning fire phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of single-fire power supply, and in particular to a single-fire power supply circuit and a smart home system. Background Art

[0002] With the vigorous development of the smart home industry, various smart devices such as switch panels, smart door locks, and smart terminals have entered the public's field of vision. In order to improve product quality and stability, existing switch panels all use zero-live input, but in some old communities, traditional mechanical switch panels with single-live input are used. In order to achieve in-situ replacement, smart switch panels with single-live input power supply are necessary.

[0003] Smart switch panels powered by a single live wire input are usually prone to "ghost fire" phenomenon. To eliminate the phenomenon, the power consumption of the smart switch panel is usually reduced. Under extremely low power consumption, the "ghost fire" phenomenon can be avoided. However, if it is a smart switch panel with a screen, the power consumption itself is relatively large. No matter how low the power consumption is, it is difficult to eliminate the "ghost fire" phenomenon when connected to low-wattage lamps.

[0004] Therefore, consider connecting a current stabilizer in parallel at both ends of the lamp, and use the current stabilizer to short-circuit the lamp when the lamp is off, providing a loop for the smart switch panel, thereby eliminating the "ghost fire". However, if the impedance of the load is lower than the current stabilizer at the moment of power-on, the current will pass through the load instead of the current stabilizer, and the current stabilizer will not work properly. In mild cases, the load lamp will have a "ghost fire" phenomenon, and in severe cases, the controller will not be able to draw power normally and the equipment will not work properly. At this time, you can choose to replace the lamp or reduce the impedance of the current stabilizer, but the actual scenario cannot limit what kind of lamp the user uses. Reducing the impedance will increase the current stabilizer current, affecting the current limit value of the current stabilizer.

[0005] Therefore, the present application proposes a single-fire power supply circuit to avoid this defect. Utility Model Content

[0006] One of the purposes of the utility model is to provide a single-fire power supply circuit, which is used to solve the "ghost fire" problem caused by the current stabilizer not working at the moment of power-on.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A single-fire power-taking circuit comprises a main circuit and a control circuit; the main circuit comprises a power-taking switch, a power-taking circuit and a current stabilizer, the switch end of the power-taking switch is connected in series in the power supply circuit of the AC power load, the power-taking circuit is connected in parallel at both ends of the switch end of the power-taking switch, a current stabilizer is provided with a current stabilizer, the current stabilizer is connected in parallel at both ends of the AC power load and is controlled to be on and off by the current stabilizer; the control circuit comprises a control module and a control switch, the control switch is connected in series between the AC power load and the switch end of the power-taking switch, and the control module controls the interlocking of the control switch and the current stabilizer.

[0009] Preferably, the output end of the control module is connected to the control end of the control switch and the control end of the regulated current switch respectively.

[0010] Preferably, the control switch is a relay, a triode switch or a MOS tube.

[0011] Preferably, the power switch is a normally open switch.

[0012] Preferably, the control switch is a normally open switch.

[0013] Preferably, the control circuit further comprises an energy storage module, the input end of the energy storage module is connected to the output end of the power extraction circuit to extract electricity and store energy, and the output end of the energy storage module is connected to the control module to supply power.

[0014] Preferably, the energy storage module is a capacitor, a battery or a magnetic energy storage element.

[0015] Preferably, the energy storage module and the control module are arranged in the current stabilizer.

[0016] The second purpose of the utility model is to provide a smart home system for solving the problem of ghost lights caused by power being taken from a switch panel.

[0017] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0018] A smart home system includes a single-fire power supply circuit and a switch panel. The single-fire power supply circuit is the single-fire power supply circuit as described above, and the switch panel draws power from the output end of the power supply circuit.

[0019] Preferably, the switch panel is a switch panel with a screen.

[0020] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0021] 1. The utility model connects a current stabilizer in parallel at both ends of the mains load, and then connects a control switch in series between the mains load and the switch end of the power taking switch. The control switch is interlocked with the current stabilizing switch. In this way, the control switch can be disconnected and the current stabilizing switch can be closed at the moment of power-on of the current stabilizer. There is no need to consider the impedance problem of the load, so that the current passes through the current stabilizing module, the current stabilizing module works normally, and the ghost fire phenomenon is avoided.

[0022] 2. The utility model connects the control end of the control switch to the output end of the control module, and can achieve interlocking through control module software interlocking or electrical interlocking, making the circuit structure more streamlined.

[0023] 3. The utility model is provided with an energy storage module. When the power taking circuit is working, the energy storage module is powered. After the energy storage module obtains power, it powers the control module. When the power taking circuit is disconnected, the control switch can still be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the topological structure of the single-fire power supply circuit of the utility model.

[0025] Figure 2 This is a schematic diagram of the topological structure of the smart home system of the utility model.

[0026] Description of reference numerals:

[0027] 100, single-fire power supply circuit; Q1, power supply switch; 110, power supply circuit; 120, current stabilizer; Q2, current stabilization switch; 121, control module; S1, control switch; 122, energy storage module; 130, AC power load; 200, switch panel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0031] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0032] Example

[0033] The utility model discloses a single-fire power-taking circuit, which comprises a main circuit and a control circuit.

[0034] In order to facilitate the understanding of the present invention, first, the main circuit configured in the present invention is described. Figure 1 As shown, the main circuit includes a power switch Q1, a power circuit 110 and a current stabilizer 120. The switch end of the power switch Q1 is connected in series in the power supply circuit of the AC load 130. The power circuit 110 is connected in parallel at both ends of the switch end of the power switch Q1 to draw power by disconnecting the power switch Q1. A current stabilizer 120 is provided with a current stabilizer Q2. The current stabilizer 120 is connected in parallel at both ends of the AC load 130 and is controlled to be on and off by the current stabilizer Q2. When the AC load 130 is disconnected, the AC load 130 is short-circuited, and the power circuit 110 draws power.

[0035] Taking a lamp as the mains load 130 as an example, for the convenience of describing the working process, the default state of the lamp is "on" and the state of the lamp is "off". For the current stabilizer 120, it only works in the "off state", that is, the power switch Q1 (MOS tube) is disconnected and the lamp is off. Therefore, Figure 1 The topological diagram shown has two working states. The first is the light-off condition. In this state, the power switch Q1 is disconnected and will not be closed, the voltage falls on the power circuit 110, and the current stabilizing switch Q2 is closed, which is equivalent to the lamp being short-circuited. The current flows through the current stabilizer 120, and the lamp will not flicker; the second is the light-on condition. In this state, the power switch Q1 is closed, which is equivalent to the power circuit 110 being short-circuited, the current stabilizing switch Q2 is disconnected, and the current flows through the lamp instead of the current stabilizer 120.

[0036] When the light is off, at the moment of power-on, if the impedance of the lamp is lower than that of the current stabilizer 120, the current will pass through the load instead of the current stabilizer 120, and the current stabilizer 120 will not work normally. At this time, the lamp will flicker, that is, the "ghost fire" phenomenon will occur.

[0037] Therefore, in order to avoid "ghost fire" in this situation, the control circuit of the utility model includes a control module 121, a current stabilizing switch Q2 and a control switch S1. Among them, the control switch S1 is connected in series between the mains load 130 and the switch end of the power switch Q1, and the control module 121 controls the on and off of the control switch S1 and the current stabilizing switch Q2 to achieve interlocking. In other words, at the moment of power-on, the control module 121 controls the current stabilizing switch Q2 to close only when it controls the control switch S1 to disconnect the light circuit. In this way, the problem of "ghost fire" caused by the current stabilizer 120 not working at the moment of power-on can be completely solved.

[0038] In this embodiment, the output end of the control module 121 is respectively connected to the control end of the control switch S1 and the control end of the steady-state current switch Q2. When the control module 121 is a programmable module such as an MCU, the control signal can be directly output at different I / O ports through the software interlocking program to interlock the control switch S1 and the steady-state current switch Q2. When the control module 121 is an execution module such as a relay, the voltage or current signal can also be directly output through electrical interlocking to interlock the control switch S1 and the steady-state current switch Q2. Software interlocking and electrical interlocking are commonly used technical means in this field, and the utility model will not be repeated here.

[0039] In this embodiment, the control switch S1 can be a relay, a transistor switch or a MOS switch. When it is a relay, the on and off of the contact switch of the relay is controlled by controlling the gain and loss of electricity of the relay coil; when it is a transistor switch, the on and off is controlled by controlling its conduction current; when it is a MOS tube, the on and off is controlled by controlling its conduction voltage.

[0040] In the present invention, the initial state of each switch can be a normally open state or a normally closed state, but in a preferred embodiment, in order to obtain a more ideal path when the lights are turned off, the power switch Q1 is set to a normally open switch, and correspondingly, the current stabilizing switch Q2 is set to a normally closed switch, and the control switch S1 is set to a normally open switch.

[0041] Please refer to Figure 1 As shown, in a preferred embodiment, the control circuit of the utility model also includes an energy storage module 122, the input end of the energy storage module 122 is connected to the output end of the power supply circuit 110 to supply power and store energy to the energy storage module 122 when the power supply circuit 110 is working, and the output end of the energy storage module 122 is connected to the control module 121 to supply power to the control module 121.

[0042] In this embodiment, the current required by the control module 121 is relatively small, at the milliampere level. Therefore, the present invention does not limit the specific type of the energy storage module 122. The energy storage module 122 can be a capacitor, a battery, or a magnetic energy storage element. In this embodiment, the energy storage module 122, the control module 121, and the current stabilization switch Q2 are arranged in the current stabilizer 120.

[0043] Please refer to Figure 1 and Figure 2 As shown, another aspect of the present invention is to provide a smart home system for solving the problem of ghost lights caused by power supply from a switch panel. The smart home system includes a single-fire power supply circuit 100 and a switch panel 200. The single-fire power supply circuit 100 is the single-fire power supply circuit as described in the previous embodiment, which will not be described in detail here. The switch panel 200 obtains power from the output end of the power supply circuit 110.

[0044] In this embodiment, the switch panel 200 is a switch panel with a screen. After adopting the topological structure of the smart home system of the utility model, the problem of ghost lights can be effectively eliminated for switch panels with screens that consume relatively high power.

[0045] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A single-fire power supply circuit, comprising a main circuit and a control circuit; the main circuit comprises a power supply switch, a power supply circuit and a current stabilizer, the switch end of the power supply switch is connected in series in the power supply circuit of the mains load, the power supply circuit is connected in parallel at both ends of the switch end of the power supply switch, and the current stabilizer is provided with a current stabilizer, the current stabilizer is connected in parallel at both ends of the mains load and is controlled to be on and off by the current stabilizer; characterized in that: The control circuit includes a control module and a control switch. The control switch is connected in series between the mains load and the switch end of the power taking switch. The control module controls the control switch to be interlocked with the stabilizing switch.

2. The single-fire power supply circuit according to claim 1, characterized in that: The output end of the control module is connected to the control end of the control switch and the control end of the regulated current switch respectively.

3. The single-fire power supply circuit according to claim 1, characterized in that: The control switch is a relay, a triode switch or a MOS tube.

4. The single-fire power supply circuit according to claim 1, characterized in that: The power switch is a normally open switch.

5. The single-fire power supply circuit according to claim 4, characterized in that: The control switch is a normally open switch.

6. The single-fire power supply circuit according to claim 1, characterized in that: The control circuit also includes an energy storage module, the input end of the energy storage module is connected to the output end of the power extraction circuit to extract electricity and store energy, and the output end of the energy storage module is connected to the control module to supply power.

7. The single-fire power supply circuit according to claim 6, characterized in that: The energy storage module is a capacitor, a battery or a magnetic energy storage element.

8. The single-fire power supply circuit according to claim 6, characterized in that: The energy storage module and the control module are arranged in the current stabilizer.

9. A smart home system, comprising a single-fire power supply circuit and a switch panel, characterized in that: The single-fire power supply circuit is the single-fire power supply circuit described in any one of claims 1 to 8, and the switch panel draws power from the output end of the power supply circuit.

10. The smart home system according to claim 9, characterized in that: The switch panel is a switch panel with a screen.

Images