Range hood power panel of two-way output illuminating lamp

Abstract

The utility model belongs to the technical field of range hood power panels, and particularly discloses a range hood power panel of a double-path output illuminating lamp, which comprises a switching power supply, a relay control circuit, a step-down circuit, an isolation motor output circuit isolated by adopting an optocoupler mode, an isolation AC illuminating lamp output circuit isolated by adopting an optocoupler mode, and a DC illuminating lamp output circuit, the switching power supply is electrically connected with the relay control circuit, and the step-down circuit is respectively and electrically connected with the isolation motor output circuit, the isolation AC illuminating lamp output circuit and the DC illuminating lamp output circuit. A control signal and an output signal of the relay control circuit are respectively isolated by the isolation motor output circuit and the isolation AC illuminating lamp output circuit through the step-down circuit, so that no interference is generated between a control panel signal and the output signal, and stable work is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of range hood power supply boards, in particular to a range hood power supply board with dual-channel output lighting lamps. Background Art

[0002] The range hood power board is one of the electronic components inside the range hood. It is responsible for managing power supply and power distribution. The range hood power board undertakes the functions of power input, power management, control signal distribution, and lighting power supply.

[0003] After searching, the Chinese patent document application number is 202022440784.3, which discloses a range hood control circuit, including a power supply circuit board and a switch circuit board. The switch circuit board is provided with a main control single-chip microcomputer circuit, and the main control single-chip microcomputer circuit is connected to a touch key input circuit for inputting control instructions, a liquid crystal display circuit for displaying the working status of the range hood, and a drive output interface. The power supply circuit board is provided with a drive input interface connected to the drive output interface, and the drive input interface is connected to a relay drive circuit for driving the range hood to smoke, a buzzer circuit for voice feedback, and an LED lighting connection port for connecting to an LED lighting lamp. The circuit structure is simplified, and the wiring connection between individual circuits is simplified. A standard universal connection port is set to facilitate the assembly and connection of the range hood control circuit.

[0004] However, there is no effective isolation between the driving output signal of the power circuit board and the output signal of the lighting lamp, which causes certain interference between the driving signal of the control board and the output signal of the lighting lamp, thereby affecting the working stability of the power board. Therefore, we need to propose a range hood power board with dual-channel output lighting lamps to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a range hood power supply board with dual-output lighting lamps. By isolating the motor output circuit and isolating the AC lighting lamp output circuit and cooperating with the step-down circuit, the AC lighting lamp output and the AC motor output can be isolated, so that there will be no interference between the control board signal and the output signal, and the operation is stable, so as to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a range hood power supply board with dual-channel output lighting lamps, comprising a switching power supply, a relay control circuit, a step-down circuit, an isolated motor output circuit isolated by optical coupling, an isolated AC lighting lamp output circuit and a DC lighting lamp output circuit isolated by optical coupling, the switching power supply is electrically connected to the relay control circuit, the relay control circuit is electrically connected to the step-down circuit, and the step-down circuit is electrically connected to the isolated motor output circuit, the isolated AC lighting lamp output circuit and the DC lighting lamp output circuit respectively;

[0007] The isolated motor output circuit includes an optocoupler U1, four pins of the optocoupler U1 are connected to transistors Q2, one end of the transistor Q2 is connected to a capacitor C6 and a resistor R3 arranged in series, six pins of the optocoupler U1 are connected to a resistor R12, one end of the resistor R12 is connected to an end of the capacitor C6 away from the resistor R3, the connecting end of the capacitor C6 and the resistor R12 is connected to a resistor R2, one end of the resistor R2 is connected to an inductor L2, and one end of the inductor L2 is connected to a capacitor C3 having one end connected to a switching power supply.

[0008] Preferably, the switching power supply includes a power chip U6, a transformer T1 and a rectifier BD1, the six pins of the transformer T1 are connected with a diode D12 and a resistor R14 and a capacitor C9 which are arranged in series, the connecting end of the diode D12 and the capacitor C9 is sequentially connected in parallel with capacitors C16, EC5, C18 and EC7, and an inductor L9 is connected between the capacitors EC5 and C18, and resistors R15 and R17 which are arranged in series are connected between the capacitors C16 and EC5;

[0009] The four pins of the power chip U6 are connected to the coupler U2, and the coupler U2 is respectively connected to the resistor R15 and the resistor R17. The five to eight pins of the coupler U6 are connected to the five pins of the transformer T1. The five pins of the transformer T1 are also connected to the diode D9. One end of the diode D9 is connected to the capacitor C7, the resistor R22, the resistor R23 and the capacitor EC1 which are arranged in parallel. One end of the rectifier BD1 is connected to the magnetic core L16, and one end of the magnetic core L16 is connected to the capacitor EC1. The other end of the rectifier BD1 is connected to the resistor R9. One end of the resistor R9 is connected to the diode D3, the capacitor NC and the coupler U5 which are arranged in parallel. One end of the coupler U5 is connected to a resistor R21 which is connected to VCC. One end of the diode D3 is connected to the diode D1, and one end of the diode D1 is connected to the resistor R11.

[0010] Preferably, the switching power supply also includes a temperature detection circuit, which includes a varistor ZNR1 and a fuse FS3 having one end connected to the AC live wire, one end of the fuse FS3 is connected in parallel with a capacitor C1 and a capacitor C2, the varistor ZNR1 is connected in parallel with the capacitor C2, and the varistor ZNR1 is also connected in parallel with a resistor R35 and a resistor R34 which are arranged in series.

[0011] Preferably, the switching power supply also includes a filtering circuit, which includes a capacitor C14, a capacitor C11, a capacitor C12 and a capacitor C13, wherein the capacitor C14 and the capacitor C11 are connected in parallel to the live line, the capacitor C12 and the capacitor C13 are connected in parallel to the neutral line, and the capacitor C11 and the capacitor C12 are connected, and the ends of the capacitors C11 and C14 away from the live line are connected to a resistor R101 whose ends are connected to the EATH signal and the MO_GND signal.

[0012] Preferably, the relay control circuit includes a relay K1 and a transistor Q3, a diode D2 is connected in parallel to the relay K1, the collector of the transistor Q3 is connected to one end of the relay K1, the emitter of the transistor Q3 is grounded, and the base of the transistor Q3 is connected to a resistor R6 whose end is connected to the REL_CON signal.

[0013] Preferably, the isolated AC lighting output circuit includes an optocoupler U3, one pin of the optocoupler U3 is connected to a resistor R16 whose end is connected to a VCC signal, six pins of the optocoupler U3 are connected to a resistor R5, four pins of the optocoupler U3 are connected to a transistor Q1, one end of the transistor Q1 is connected to a capacitor C5 and a resistor R10 arranged in series, one end of the capacitor C5 is connected to the other end of the transistor Q1 and one end of the resistor R5, one end of the capacitor C5 is also connected to the resistor R1, one end of the resistor R1 is connected to a magnetic core L3, one end of the magnetic core L3 is connected to a capacitor C4, and one end of the capacitor C4 is connected to an inductor L7.

[0014] Preferably, the step-down circuit includes a step-down chip U4, five pins of the step-down chip U4 are connected to a resistor R28 and a resistor R29 whose one end receives a VCC signal, one end of the resistor R28 is connected in parallel to a capacitor C19, a diode D4, a capacitor EC2 and a capacitor C14, an inductor L8 is connected between the diode D4 and the capacitor EC2, the connection end of the inductor L8 and the diode D4 is connected to two pins of the step-down chip U4, one end of the capacitor C19 is connected to three pins of the step-down chip U4, and a resistor R20 and a resistor R24 ​​arranged in parallel are connected between the six pins and one pin of the step-down chip U4.

[0015] Preferably, the DC lighting lamp output circuit includes a transistor Q5 and a transistor Q6, the base of the transistor Q6 is connected to a resistor R27 having one end receiving an LED signal, the emitter of the transistor Q6 is grounded, the collector of the transistor Q6 is connected to a resistor R32, one end of the resistor R32 is connected to a resistor R31, the connecting end of the resistor R32 and the resistor R31 is connected to the base of the transistor Q5, the other end of the resistor R31 is connected to the emitter of the transistor Q5, and the emitter of the transistor Q5 is connected to an inductor L4 having one end connected to a 12V voltage, and the collector of the transistor Q5 is connected to the positive pole of the lighting lamp.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model isolates the AC lighting output and the AC motor output by isolating the motor output circuit and the AC lighting output circuit. The control signal and the output signal of the relay control circuit are respectively isolated by the isolated motor output circuit and the isolated AC lighting output circuit via the step-down circuit, so that there is no interference between the control board signal and the output signal, and the operation is stable.

[0018] 2. The utility model adds one DC lighting output circuit through the cooperation of the DC lighting output circuit and the step-down circuit to meet the various lighting needs of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a system block diagram of the utility model;

[0020] Figure 2 This is a circuit diagram of the switching power supply of the utility model;

[0021] Figure 3 It is a circuit diagram of the relay control circuit of the utility model;

[0022] Figure 4 This is a circuit diagram of the isolated motor output circuit of the utility model;

[0023] Figure 5 This is a circuit diagram of the isolated AC lighting output circuit of the utility model;

[0024] Figure 6 It is a circuit diagram of the step-down circuit of the utility model;

[0025] Figure 7 The circuit diagram of the DC lighting output circuit of the utility model is shown in FIG. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-7 The utility model provides a technical solution: a range hood power supply board with dual-channel output lighting lamps, including a switching power supply, a relay control circuit, a step-down circuit, an isolated motor output circuit isolated by optical coupling, an isolated AC lighting lamp output circuit and a DC lighting lamp output circuit isolated by optical coupling, the switching power supply is electrically connected to the relay control circuit, the relay control circuit is electrically connected to the step-down circuit, and the step-down circuit is electrically connected to the isolated motor output circuit, the isolated AC lighting lamp output circuit and the DC lighting lamp output circuit respectively;

[0028] like Figure 2 As shown, the switching power supply includes a power chip U6, a transformer T1 and a rectifier BD1, the six pins of the transformer T1 are connected with a diode D12 and a resistor R14 and a capacitor C9 which are arranged in series, the connecting end of the diode D12 and the capacitor C9 are sequentially connected in parallel with capacitors C16, EC5, C18 and EC7, and an inductor L9 is connected between the capacitors EC5 and C18, and resistors R15 and R17 which are arranged in series are connected between the capacitors C16 and EC5;

[0029] The four pins of the power chip U6 are connected to the coupler U2, and the coupler U2 is respectively connected to the resistor R15 and the resistor R17. The five to eight pins of the coupler U6 are all connected to the five pins of the transformer T1. The five pins of the transformer T1 are also connected to the diode D9. One end of the diode D9 is connected to the capacitor C7, the resistor R22, the resistor R23 and the capacitor EC1 which are arranged in parallel. One end of the rectifier BD1 is connected to the magnetic core L16, and one end of the magnetic core L16 is connected to the capacitor EC1. The other end of the rectifier BD1 is connected to the resistor R9. One end of the resistor R9 is connected to the diode D3, the capacitor NC and the coupler U5 which are arranged in parallel. One end of the coupler U5 is connected to a resistor R21 having one end connected to VCC. One end of the diode D3 is connected to the diode D1, and one end of the diode D1 is connected to the resistor R11.

[0030] The switching power supply also includes a temperature detection circuit, which includes a varistor ZNR1 and a fuse FS3 having one end connected to the AC live wire. One end of the fuse FS3 is connected in parallel with capacitors C1 and C2. The varistor ZNR1 is connected in parallel with capacitor C2. The varistor ZNR1 is also connected in parallel with resistors R35 and R34 which are arranged in series. The temperature of the power board is monitored in real time through the varistor ZNR1 to prevent the power board from being overheated and affecting its normal use.

[0031] The switching power supply also includes a filtering circuit, which includes capacitor C14, capacitor C11, capacitor C12 and capacitor C13. Capacitor C14 and capacitor C11 are connected in parallel on the live wire, capacitor C12 and capacitor C13 are connected in parallel on the neutral wire, and capacitor C11 and capacitor C12 are connected. The ends of capacitor C11 and capacitor C14 away from the live wire are connected to a resistor R101 whose end is connected to the EATH signal and the MO_GND signal. The input signal of the switching power supply is filtered by the filtering circuit to ensure the stability of the transmission of the input signal of the switching power supply.

[0032] like Figure 3 As shown, the relay control circuit includes a relay K1 and a transistor Q3. A diode D2 is connected in parallel to the relay K1. The collector of the transistor Q3 is connected to one end of the relay K1. The emitter of the transistor Q3 is grounded. The base of the transistor Q3 is connected to a resistor R6 whose end is connected to the REL_CON signal. The on and off of the output signal transmission is controlled by the relay K1.

[0033] like Figure 4 As shown, the isolated motor output circuit includes an optocoupler U1, four pins of the optocoupler U1 are connected to transistors Q2, one end of the transistor Q2 is connected to a capacitor C6 and a resistor R3 which are arranged in series, six pins of the optocoupler U1 are connected to a resistor R12, one end of the resistor R12 is connected to an end of the capacitor C6 away from the resistor R3, the connecting end of the capacitor C6 and the resistor R12 is connected to a resistor R2, one end of the resistor R2 is connected to an inductor L2, one end of the inductor L2 is connected to a capacitor C3 whose end is connected to a switching power supply, and the motor output signal is isolated by the optocoupler U1 to prevent the motor output signal from interfering with the lighting output signal.

[0034] like Figure 5As shown, the isolated AC lighting lamp output circuit includes an optocoupler U3, one pin of the optocoupler U3 is connected to a resistor R16 whose end is connected to the VCC signal, the six pins of the optocoupler U3 are connected to a resistor R5, the four pins of the optocoupler U3 are connected to a transistor Q1, one end of the transistor Q1 is connected to a capacitor C5 and a resistor R10 arranged in series, one end of the capacitor C5 is connected to the other end of the transistor Q1 and one end of the resistor R5, one end of the capacitor C5 is also connected to the resistor R1, one end of the resistor R1 is connected to a magnetic core L3, one end of the magnetic core L3 is connected to a capacitor C4, one end of the capacitor C4 is connected to an inductor L7, the lighting lamp output signal is isolated by the optocoupler U3, and the interference of the lighting lamp output signal with the motor drive signal is reduced.

[0035] like Figure 6 As shown, the step-down circuit includes a step-down chip U4, the five pins of the step-down chip U4 are connected with a resistor R28 and a resistor R29 whose one end receives a VCC signal, one end of the resistor R28 is connected in parallel with a capacitor C19, a diode D4, a capacitor EC2 and a capacitor C14, an inductor L8 is connected between the diode D4 and the capacitor EC2, the connecting end of the inductor L8 and the diode D4 is connected to the two pins of the step-down chip U4, one end of the capacitor C19 is connected to the three pins of the step-down chip U4, and a resistor R20 and a resistor R24 ​​arranged in parallel are connected between the six pins and one pin of the step-down chip U4, and the inductance is reduced to the working voltage of the power board through the step-down chip U4, so that the power board can work stably.

[0036] like Figure 7 As shown, the DC lighting output circuit includes a transistor Q5 and a transistor Q6, the base of the transistor Q6 is connected to a resistor R27 having one end receiving an LED signal, the emitter of the transistor Q6 is grounded, the collector of the transistor Q6 is connected to a resistor R32, one end of the resistor R32 is connected to a resistor R31, the connecting end of the resistor R32 and the resistor R31 is connected to the base of the transistor Q5, the other end of the resistor R31 is connected to the emitter of the transistor Q5, and the emitter of the transistor Q5 is connected to an inductor L4 having one end connected to a 12V voltage, the collector of the transistor Q5 is connected to the positive pole of the lighting lamp, and the negative pole of the lighting lamp is grounded, so that the power board adds one DC lighting output to meet various lighting needs of the range hood.

[0037] The AC lighting output and the AC motor output are isolated by isolating the motor output circuit and the AC lighting output circuit. The control signal and the output signal of the relay control circuit are isolated by the isolated motor output circuit and the isolated AC lighting output circuit respectively through the step-down circuit, so that there is no interference between the control board signal and the output signal, and stable operation is achieved.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A range hood power supply board with dual-channel lighting output, characterized in that: It includes a switching power supply, a relay control circuit, a step-down circuit, an isolated motor output circuit isolated by optical coupling, an isolated AC lighting output circuit and a DC lighting output circuit isolated by optical coupling, the switching power supply is electrically connected to the relay control circuit, the relay control circuit is electrically connected to the step-down circuit, and the step-down circuit is electrically connected to the isolated motor output circuit, the isolated AC lighting output circuit and the DC lighting output circuit respectively; The isolated motor output circuit includes an optocoupler U1, four pins of the optocoupler U1 are connected to transistors Q2, one end of the transistor Q2 is connected to a capacitor C6 and a resistor R3 arranged in series, six pins of the optocoupler U1 are connected to a resistor R12, one end of the resistor R12 is connected to an end of the capacitor C6 away from the resistor R3, the connecting end of the capacitor C6 and the resistor R12 is connected to a resistor R2, one end of the resistor R2 is connected to an inductor L2, and one end of the inductor L2 is connected to a capacitor C3 having one end connected to a switching power supply.

2. The range hood power board with dual-output lighting lamps according to claim 1, characterized in that: The switching power supply includes a power chip U6, a transformer T1 and a rectifier BD1, the six pins of the transformer T1 are connected with a diode D12 and a resistor R14 and a capacitor C9 arranged in series, the connecting end of the diode D12 and the capacitor C9 is sequentially connected in parallel with capacitors C16, EC5, C18 and EC7, and an inductor L9 is connected between the capacitors EC5 and C18, and resistors R15 and R17 arranged in series are connected between the capacitors C16 and EC5; The four pins of the power chip U6 are connected to the coupler U2, and the coupler U2 is respectively connected to the resistor R15 and the resistor R17. The five to eight pins of the coupler U6 are connected to the five pins of the transformer T1. The five pins of the transformer T1 are also connected to the diode D9. One end of the diode D9 is connected to the capacitor C7, the resistor R22, the resistor R23 and the capacitor EC1 which are arranged in parallel. One end of the rectifier BD1 is connected to the magnetic core L16, and one end of the magnetic core L16 is connected to the capacitor EC1. The other end of the rectifier BD1 is connected to the resistor R9. One end of the resistor R9 is connected to the diode D3, the capacitor NC and the coupler U5 which are arranged in parallel. One end of the coupler U5 is connected to a resistor R21 which is connected to VCC. One end of the diode D3 is connected to the diode D1, and one end of the diode D1 is connected to the resistor R11.

3. The range hood power supply board with dual-output lighting lamps according to claim 2, characterized in that: The switching power supply also includes a temperature detection circuit, which includes a varistor ZNR1 and a fuse FS3 having one end connected to the AC live wire, one end of the fuse FS3 is connected in parallel with a capacitor C1 and a capacitor C2, the varistor ZNR1 is connected in parallel with the capacitor C2, and the varistor ZNR1 is also connected in parallel with a resistor R35 and a resistor R34 which are arranged in series.

4. The range hood power supply board with dual-output lighting lamps according to claim 3, characterized in that: The switching power supply also includes a filtering circuit, which includes a capacitor C14, a capacitor C11, a capacitor C12 and a capacitor C13. The capacitor C14 and the capacitor C11 are connected in parallel to the live line, the capacitor C12 and the capacitor C13 are connected in parallel to the neutral line, and the capacitor C11 and the capacitor C12 are connected. The ends of the capacitors C11 and C14 away from the live line are connected to a resistor R101 whose ends are connected to an EATH signal and a MO_GND signal.

5. The range hood power supply board with dual-output lighting lamps according to claim 4, characterized in that: The relay control circuit includes a relay K1 and a transistor Q3, a diode D2 is connected in parallel to the relay K1, a collector of the transistor Q3 is connected to one end of the relay K1, an emitter of the transistor Q3 is grounded, and a base of the transistor Q3 is connected to a resistor R6 having one end connected to a REL_CON signal.

6. The range hood power board with dual-output lighting lamps according to claim 5, characterized in that: The isolated AC lighting output circuit includes an optocoupler U3, one pin of the optocoupler U3 is connected to a resistor R16 whose end is connected to a VCC signal, six pins of the optocoupler U3 are connected to a resistor R5, four pins of the optocoupler U3 are connected to a transistor Q1, one end of the transistor Q1 is connected to a capacitor C5 and a resistor R10 arranged in series, one end of the capacitor C5 is connected to the other end of the transistor Q1 and one end of the resistor R5, one end of the capacitor C5 is also connected to the resistor R1, one end of the resistor R1 is connected to a magnetic core L3, one end of the magnetic core L3 is connected to a capacitor C4, and one end of the capacitor C4 is connected to an inductor L7.

7. The range hood power supply board with dual-output lighting lamps according to claim 6, characterized in that: The step-down circuit includes a step-down chip U4, the five pins of the step-down chip U4 are connected to a resistor R28 and a resistor R29 whose one end receives a VCC signal, one end of the resistor R28 is connected in parallel to a capacitor C19, a diode D4, a capacitor EC2 and a capacitor C14, an inductor L8 is connected between the diode D4 and the capacitor EC2, the connection end of the inductor L8 and the diode D4 is connected to the two pins of the step-down chip U4, one end of the capacitor C19 is connected to the three pins of the step-down chip U4, and a resistor R20 and a resistor R24 ​​arranged in parallel are connected between the six pins and one pin of the step-down chip U4.

8. The range hood power board with dual-output lighting lamps according to claim 7, characterized in that: The DC lighting lamp output circuit includes a transistor Q5 and a transistor Q6, the base of the transistor Q6 is connected to a resistor R27 having one end receiving an LED signal, the emitter of the transistor Q6 is grounded, the collector of the transistor Q6 is connected to a resistor R32, one end of the resistor R32 is connected to a resistor R31, the connecting end of the resistor R32 and the resistor R31 is connected to the base of the transistor Q5, the other end of the resistor R31 is connected to the emitter of the transistor Q5, and the emitter of the transistor Q5 is connected to an inductor L4 having one end connected to a 12V voltage, and the collector of the transistor Q5 is connected to the positive pole of the lighting lamp.

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