CN207442812U - A kind of delay switching-off device of smoke exhaust ventilator - Google Patents

Abstract

The utility model provides a kind of delay switching-off device of smoke exhaust ventilator, device mainly includes 555 chips, solid-state relay and RC charge-discharge circuit, device major function is delay cut-off, when pressing switch power supply button, device is persistently powered to smoke exhaust ventilator, when pressing pass power button, device continues to power to smoke exhaust ventilator, so that smoke exhaust ventilator works on, to take the oil smoke in kitchen away, about after five minutes, device disconnects smoke exhaust ventilator power supply automatically for delay, smoke exhaust ventilator is made to be stopped, user is avoided to cause waste of energy when forgetting to turn off smoke exhaust ventilator.

Description

A kind of delay switching-off device of smoke exhaust ventilator

Technical field

The utility model is related to a kind of delay switching-off devices of smoke exhaust ventilator, belong to electronic technology field.

Background technology

Smoke exhaust ventilator is the sharp weapon for tackling kitchen fume, but due to smoke exhaust ventilator power is not big etc. enough, cooking generates Oil smoke be difficult to drain completely net, the oil smoke of spilling is often full of entire kitchen, for this purpose, when cooking is stopped after, general user selects Smoke exhaust ventilator is allowed to work on, to take the oil smoke of spilling away as far as possible.Also Just because of this, when user does other subsequent, often forget Note turns off smoke exhaust ventilator in time, so as to cause the waste of electric energy.

Utility model content

To solve the above-mentioned problems, the utility model provides a kind of delay switching-off device of smoke exhaust ventilator, this device can For controlling the power supply of smoke exhaust ventilator, when the open button for pressing this device, this device persistently gives smoke exhaust ventilator power supply, when pressing this The close button of device, this device continue to power to smoke exhaust ventilator, and about after five minutes, broken smoke exhaust ventilator is powered automatically for delay, so as to Reach energy saving purpose.

The specific technical solution that the utility model is taken is as follows：

A kind of delay switching-off device of smoke exhaust ventilator, it is characterized in that：The circuit of the device includes 555 chip U1 and U2, consolidates Body relay U3, touch key K1 and K2, capacitance C1 and C2, resistance R1~R5, connectivity port AC1~AC4 and diode D1, 8 feet of wherein 555 chip U1 connect positive supply, 1 foot ground connection, one end of 4 foot connecting resistance R2 and the anode of capacitance C1, and resistance R2's is another One termination positive supply, the cathode ground connection of capacitance C1；One end of 2 foot connecting resistance R1 of 555 chip U1 and one end of button K1, resistance Another termination positive supply of R1, the other end ground connection of button K1；One end of the 6 foot connecting resistance R3 of 555 chip U1 and button K2's One end, the other end ground connection of resistance R3, another termination positive supply of button K2；3 feet of 555 chip U1 are meeting diode D1 just Pole, the cathode of diode D1 connect 2 feet of 555 chip U2 and one end of 6 feet, the anode of capacitance C2 and resistance R4, and capacitance C2's is negative The other end of pole and resistance R4 are grounded；8 feet and 4 feet of 555 chip U2 connect positive supply, 1 foot ground connection, and 3 feet meet solid-state relay U3 2 feet；One end of the 1 foot connecting resistance R5 of solid-state relay U3, another termination positive supply of resistance R5；The 6 of solid-state relay U3 Foot is connected to connectivity port AC1, and 4 feet are connected to connectivity port AC3, and connectivity port AC2 is connected with AC4；AC1 and AC2 connect for connectivity port 220V AC powers, connectivity port AC3 and AC4 are connected to the attaching plug of smoke exhaust ventilator；Solid-state relay U3 uses MOC3021 Model.

The beneficial effects of the utility model are：It, can after user stops cooking with the delay switching-off device of this smoke exhaust ventilator The close button of this device is directly pressed, this device continues to power 5 minutes to smoke exhaust ventilator, and then broken smoke exhaust ventilator supplies automatically Electricity avoids user from causing waste of energy when forgetting to turn off smoke exhaust ventilator.

Description of the drawings

Fig. 1 is the circuit diagram of the utility model.

Specific embodiment

The utility model is described further below in conjunction with the accompanying drawings.

As shown in Figure 1, a kind of delay switching-off device of smoke exhaust ventilator, circuit includes 555 chip U1 and U2, solid relay Device U3, touch key K1 and K2, capacitance C1 and C2, resistance R1~R5, connectivity port AC1~AC4 and diode D1, wherein 555 8 feet of chip U1 connect positive supply, 1 foot ground connection, one end of 4 foot connecting resistance R2 and the anode of capacitance C1, another termination of resistance R2 Positive supply, the cathode ground connection of capacitance C1；One end of 2 foot connecting resistance R1 of 555 chip U1 and one end of button K1, resistance R1's Another termination positive supply, the other end ground connection of button K1；One end of the 6 foot connecting resistance R3 of 555 chip U1 and the one of button K2 End, the other end ground connection of resistance R3, another termination positive supply of button K2；3 feet of 555 chip U1 connect the anode of diode D1, The cathode of diode D1 connects 2 feet of 555 chip U2 and one end of 6 feet, the anode of capacitance C2 and resistance R4, the cathode of capacitance C2 and The other end ground connection of resistance R4；8 feet and 4 feet of 555 chip U2 connect positive supply, 1 foot ground connection, and 3 feet connect the 2 of solid-state relay U3 Foot；One end of the 1 foot connecting resistance R5 of solid-state relay U3, another termination positive supply of resistance R5；6 feet of solid-state relay U3 connect To connectivity port AC1,4 feet are connected to connectivity port AC3, and connectivity port AC2 is connected with AC4；AC1 and AC2 meet 220V for connectivity port AC power, connectivity port AC3 and AC4 are connected to the attaching plug of smoke exhaust ventilator；Solid-state relay U3 uses MOC3021 types Number.Circuit constitutes a flip and flop generator by 555 chip U1 and its peripheral cell, and wherein touch key K1 and K2 is respectively Switch power supply button and pass power button；Amplifier U2 and its peripheral cell constitute a voltage comparator, wherein resistance R4 and R5 strings Connection partial pressure provides the reference voltage of about 0.5V to the inverting input of amplifier U2；When amplifier U2 exports high level, triode Q1 Conducting, the normal open switch of relay RL1 are connected, and smoke exhaust ventilator is powered and worked.

When the present apparatus is powered every time, positive supply charges to capacitance C1 by resistance R2, and the voltage of capacitance C1 anodes gives 555 cores The reset terminal of piece U1 provides reset signal, 3 foot of the output terminal output low level of 555 chip U1, diode D1 cut-offs, 555 chips 2 feet and 6 feet of U2 are low level, the output terminal output high level of 555 chip U2, and the bidirectional triode thyristor in solid-state relay closes Disconnected, smoke exhaust ventilator cannot work；When user needs to open smoke exhaust ventilator, by a K1 button, triggering 555 chip U1 outputs High level exports high level and carries out quick charge to C2 through D1, and C2 cathode voltages quickly raise, 2 feet and 6 of 555 chip U2 The voltage of foot is more than 2/3rds of positive voltage, the output terminal of 555 chip U2 output low level, double in solid-state relay To controlled silicon conducting, smoke exhaust ventilator obtains operating voltage and starts to work；When user's stopping cooking, by a K2 button, triggering 555 chip U1 export low level, diode D1 cut-offs, and capacitance C2 slowly discharges through R4, about after five minutes, capacitance C2 cathode voltages Less than 1/3rd of positive voltage, 555 chip U2 output high level, the bidirectional triode thyristor in solid-state relay turns off, and takes out Kitchen ventilator is stopped.

Claims (1)

1. a kind of delay switching-off device of smoke exhaust ventilator, it is characterized in that：The circuit of the device includes 555 chip U1 and U2, solid Relay U3, touch key K1 and K2, capacitance C1 and C2, resistance R1~R5, connectivity port AC1~AC4 and diode D1, wherein 8 feet of 555 chip U1 connect positive supply, 1 foot ground connection, one end of 4 foot connecting resistance R2 and the anode of capacitance C1, the other end of resistance R2 Connect positive supply, the cathode ground connection of capacitance C1；One end of 2 foot connecting resistance R1 of 555 chip U1 and one end of button K1, resistance R1's Another termination positive supply, the other end ground connection of button K1；One end of 6 foot connecting resistance R3 of 555 chip U1 and one end of button K2, The other end ground connection of resistance R3, another termination positive supply of button K2；3 feet of 555 chip U1 connect the anode of diode D1, two poles The cathode of pipe D1 connects 2 feet of 555 chip U2 and one end of 6 feet, the anode of capacitance C2 and resistance R4, the cathode and resistance of capacitance C2 The other end ground connection of R4；8 feet and 4 feet of 555 chip U2 connect positive supply, 1 foot ground connection, and 3 feet connect 2 feet of solid-state relay U3；Gu One end of the 1 foot connecting resistance R5 of body relay U3, another termination positive supply of resistance R5；6 feet of solid-state relay U3 are connected to company Port AC1 is met, 4 feet are connected to connectivity port AC3, and connectivity port AC2 is connected with AC4；Connectivity port AC1 meets 220V with AC2 and exchanges Power supply, connectivity port AC3 and AC4 are connected to the attaching plug of smoke exhaust ventilator；Solid-state relay U3 uses MOC3021 models.