Wireless control circuit of air curtain machine

Abstract

The utility model relates to the technical field of air curtain machines, in particular to a wireless control circuit of an air curtain machine, which comprises the components of a 220V commercial power which comprises a first output end and a second output end; the input end of the power supply circuit is respectively connected with the first output end and the second output end, and the output end of the power supply circuit respectively outputs DC 12V and DC 5V; the wireless receiving circuit is used for receiving a wireless control signal; the power supply end of the main control circuit is electrically connected with DC5V, the control end of the main control circuit is electrically connected with the output end of the wireless receiving circuit, and the main control circuit is used for outputting a control signal; the input end of the driving circuit is electrically connected with the output end of the main control circuit; one input end of the air curtain motor M is electrically connected with the output end of the driving circuit, and the other input end of the air curtain motor M is electrically connected with the first output end of the 220V mains supply.

Description

Technical Field

[0001] This utility model relates to the field of air curtain machine technology, specifically to a wireless control circuit for an air curtain machine. Background Technology

[0002] An air curtain machine is a device that uses a high-speed air curtain motor to drive a fan wheel, generating a powerful airflow that forms an invisible air barrier. The air curtain machine uses one or more fans to draw air in from one side of the casing and then blow it out at high speed from the other side, creating a high-speed airflow. When this high-speed airflow moves from one side of the air curtain to the other, it forms an invisible barrier that prevents dust, insects, odors, and other harmful substances from entering the room.

[0003] However, currently, air curtain machines are generally manually controlled, which requires manual operation and is inconvenient to use, and does not meet people's current needs.

[0004] Therefore, a wireless control circuit for air curtain machines is needed to solve this problem. Utility Model Content

[0005] This invention provides a wireless control circuit for an air curtain machine to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wireless control circuit for an air curtain machine includes:

[0008] The mains power is 220V, and the 220V mains power includes a first output terminal and a second output terminal;

[0009] A power supply circuit, wherein the input terminal of the power supply circuit is connected to the first output terminal and the first output terminal respectively, and the output terminal of the power supply circuit outputs DC12V and DC5V respectively.

[0010] A wireless receiving circuit, wherein the wireless receiving circuit is used to receive wireless control signals;

[0011] The main control circuit has its power supply terminal electrically connected to DC5V and its control terminal electrically connected to the output terminal of the wireless receiving circuit. The main control circuit is used to output control signals.

[0012] A driving circuit, wherein the input terminal of the driving circuit is electrically connected to the output terminal of the main control circuit;

[0013] An air curtain motor M is provided, with one input terminal electrically connected to the output terminal of the drive circuit, and the other input terminal electrically connected to the first output terminal of the 220V AC mains power.

[0014] As a preferred embodiment of this utility model, the power supply circuit includes a rectifier bridge and a voltage conversion circuit; the input terminal of the rectifier bridge is electrically connected to the first output terminal and the second output terminal respectively, and the output terminal of the rectifier bridge is used to output DC12V; the input terminal of the voltage conversion circuit is electrically connected to the output terminal of the rectifier bridge and converts DC12V to DC5V.

[0015] As a preferred embodiment of this utility model, the voltage conversion circuit comprises a 78L05 chip and peripheral circuitry of the 78L05 chip; the input terminal of the 78L05 chip is electrically connected to the output terminal of the rectifier bridge.

[0016] As a preferred embodiment of this utility model, the wireless receiving circuit includes an antenna ANT, a capacitor C4, an inductor L, a diode D5, a resistor R1, a resistor R4, a resistor R2, a resistor R3, and a transistor Q1. The antenna ANT is grounded via capacitor C4. The two ends of the inductor L are electrically connected to the two ends of the capacitor C4, forming an oscillation circuit. One end of the diode D5 is electrically connected to the center tap of the inductor L. The other end of the diode D5 is electrically connected to one end of the capacitor C5, one end of the resistor R1, one end of the resistor R3, and the base of the transistor Q1. The other ends of the capacitor C5 and the resistor R1 are both grounded. The other end of the resistor R3 is electrically connected to the collector of the transistor Q1. The collector of the transistor Q1 is electrically connected to the output terminal of the 78L05 chip via resistor R4. One emitter of the transistor Q1 is grounded via resistor R2, and the other is electrically connected to a control terminal of the main control circuit.

[0017] As a preferred embodiment of this utility model, the main control circuit includes an MDT2005 chip and peripheral circuitry of the MDT2005 chip; pin 3 of the MDT2005 chip is electrically connected to the output terminal of the 78L05 chip, and pin 9 of the MDT2005 chip is electrically connected to the collector of transistor Q1.

[0018] In a preferred embodiment of this invention, the driving circuit includes diode D6, capacitor C13, resistors R9 and R10, a ULN2003A chip, resistor R11, diode D7, and relay RELAY. One end of diode D6 is electrically connected to pin 10 of the MDT2005 chip, and the other end of diode D6 is electrically connected to pin 4 of the ULN2003A chip via resistor R10. One end of resistor R9 and one end of capacitor C13 are both electrically connected to one end of resistor R10 and grounded. Pin 1 of the ULN2003A chip is electrically connected to pin 10 of the MDT2005 chip; pin 9 of the ULN2003A chip is electrically connected to the output of the rectifier bridge; one end of resistor R11 is electrically connected to pin 9 of the ULN2003A chip; the other end of resistor R11 is electrically connected to one end of relay RELAY and pin 16 of the ULN2003A chip via diode D7; the other end of relay RELAY is electrically connected to one output of the rectifier bridge.

[0019] As a preferred embodiment of this utility model, the relay RELAY further includes a normally open switch S, one end of which is electrically connected to the input terminal of the air curtain motor M, and the other end of which is electrically connected to the second terminal of the 220V mains power.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] In this invention, the 220V AC mains power is converted into DC12V and DC5V via a power supply circuit, allowing the circuit to provide multiple voltage power supplies. Additionally, when a control signal is received via the wireless receiving circuit, it is transmitted to the main control circuit. The main control circuit identifies the transmitted control signal and, after identification, outputs a control signal through the drive circuit, controlling the air curtain motor M to connect to the 220V AC mains power. Once connected, the air curtain motor M begins operation. This design enables wireless control of the air curtain machine, and multiple air curtain machine control circuits can be set up to achieve the control of multiple different air curtain machines as needed. Attached Figure Description

[0022] Figure 1 This is the circuit schematic diagram of this utility model;

[0023] Figure 2 This utility model applies multiple air curtain machine control block diagrams. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example 1, please refer to Figure 1 This utility model provides a technical solution:

[0026] A wireless control circuit for an air curtain machine includes:

[0027] The mains power is 220V, and the 220V mains power includes a first output terminal and a second output terminal;

[0028] A power supply circuit, wherein the input terminal of the power supply circuit is connected to the first output terminal and the first output terminal respectively, and the output terminal of the power supply circuit outputs DC12V and DC5V respectively.

[0029] A wireless receiving circuit, wherein the wireless receiving circuit is used to receive wireless control signals;

[0030] The main control circuit has its power supply terminal electrically connected to DC5V and its control terminal electrically connected to the output terminal of the wireless receiving circuit. The main control circuit is used to output control signals.

[0031] A driving circuit, wherein the input terminal of the driving circuit is electrically connected to the output terminal of the main control circuit;

[0032] An air curtain motor M is provided, with one input terminal of the air curtain motor M electrically connected to the output terminal of the drive circuit, and the other input terminal of the air curtain motor M electrically connected to the first output terminal of the 220V AC mains power.

[0033] The system converts 220V AC mains power into DC 12V and DC 5V via a power supply circuit, allowing for multiple voltage power supplies. When a control signal is received via a wireless receiver circuit, it is transmitted to the main control circuit. The main control circuit identifies the transmitted control signal and, after identification, outputs a control signal through the drive circuit, controlling the air curtain motor M to connect to 220V AC mains power. Once connected, the air curtain motor M begins operation. This design enables wireless control of the air curtain machine, and multiple wireless control circuits can be set up to control multiple air curtain machines as needed.

[0034] Reference Figure 1In this embodiment, the power supply circuit includes a rectifier bridge and a voltage conversion circuit. The input terminal of the rectifier bridge is electrically connected to a first output terminal and a second output terminal, respectively, and the output terminal of the rectifier bridge is used to output DC12V. The input terminal of the voltage conversion circuit is electrically connected to the output terminal of the rectifier bridge and converts DC12V to DC5V. The voltage conversion circuit includes a 78L05 chip and peripheral circuitry of the 78L05 chip. The input terminal of the 78L05 chip is electrically connected to the output terminal of the rectifier bridge.

[0035] The rectifier bridge includes a circuit composed of rectifier diodes D1, D2, D3, and D4. The rectifier bridge is used to rectify the 220V AC mains power into DC 12V to power the downstream circuit. In addition, by electrically connecting the 78L05 chip to the output terminal of the rectifier bridge, the DC 12V voltage rectified by the rectifier bridge is converted into DC 5V.

[0036] Reference Figure 1 In this embodiment, the wireless receiving circuit includes an antenna ANT, a capacitor C4, an inductor L, a diode D5, a resistor R1, a resistor R4, a resistor R2, a resistor R3, and a transistor Q1. The antenna ANT is grounded via capacitor C4. The two ends of the inductor L are electrically connected to the two ends of the capacitor C4, forming an oscillation circuit. One end of the diode D5 is electrically connected to the center tap of the inductor L. The other end of the diode D5 is electrically connected to one end of the capacitor C5, one end of the resistor R1, one end of the resistor R3, and the base of the transistor Q1. The other ends of the capacitor C5 and the resistor R1 are both grounded. The other end of the resistor R3 is electrically connected to the collector of the transistor Q1. The collector of the transistor Q1 is electrically connected to the output terminal of the 78L05 chip via resistor R4. One emitter of the transistor Q1 is grounded via resistor R2, and the other is electrically connected to a control terminal of the main control circuit.

[0037] The system receives the control signal through the antenna ANT. After the capacitor C4 and the inductor L resonate, the control signal is output and filtered by the capacitor C5. The filtered signal is then a smooth control signal, which is further amplified by the transistor Q1 and output to the main control circuit.

[0038] Reference Figure 1In this embodiment, the main control circuit includes an MDT2005 chip and its peripheral circuitry; pin 3 of the MDT2005 chip is electrically connected to the output of the 78L05 chip, and pin 9 of the MDT2005 chip is electrically connected to the collector of transistor Q1; the driving circuit includes diode D6, capacitor C13, resistors R9 and R10, a ULN2003A chip, resistor R11, diode D7, and a relay RELAY; one end of diode D6 is electrically connected to pin 10 of the MDT2005 chip, and the other end of diode D6 is electrically connected to pin 4 of the ULN2003A chip via resistor R10; one end of resistor R9 and one end of capacitor C13 are both connected to the collector of resistor R10. One end is electrically connected and grounded; pin 1 of the ULN2003A chip is electrically connected to pin 10 of the MDT2005 chip; pin 9 of the ULN2003A chip is electrically connected to the output of the rectifier bridge; one end of the resistor R11 is electrically connected to pin 9 of the ULN2003A chip; the other end of the resistor R11 is electrically connected via diode D7 to one end of the relay RELAY and pin 16 of the ULN2003A chip; the other end of the relay RELAY is electrically connected to one output of the rectifier bridge; the relay RELAY also includes a normally open switch S, one end of which is electrically connected to the input of the air curtain motor M, and the other end of which is electrically connected to the second terminal of the 220V AC mains power.

[0039] When the MDT2005 chip receives the wireless reception control signal, it identifies the control signal number and outputs a control signal. The ULN2003A chip then outputs a drive signal to close the normally open switch S of the relay RELAY. After the normally open switch S closes, the 220V AC mains power is output to the air curtain motor M through the normally open switch S, thereby making the air curtain motor M work.

[0040] Example 2:

[0041] Reference Figure 2 A wireless control circuit for air curtain machines, used for controlling multiple air curtain machines, comprises: a central control device (equivalent to a wireless signal transmitter), a LoRa wireless module (equivalent to a wireless control circuit for air curtain machines), and multiple air curtain machines;

[0042] The central control unit serves as the core of the control system and can employ user-friendly interfaces such as touchscreens. It also transmits wireless signals. Lora wireless modules are installed on the central control unit or the air curtain machine to receive the wireless signals.

[0043] Specifically, operators send control commands through the central control device, which then transmits the commands to the air curtain machine via its built-in LoRa wireless module. Simultaneously, the air curtain machine's operating commands and equipment status are also reported to the central control device via its built-in LoRa wireless module. Upon receiving the commands, the air curtain machine's LoRa wireless module transmits them to the air curtain machine's control circuitry, thereby controlling the air curtain machine to perform corresponding operations, such as opening, closing, and adjusting the airflow speed. The air curtain machine's operating commands and equipment status are also reported to the central control device via its built-in LoRa wireless module.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wireless control circuit for an air curtain machine, characterized in that: include: The mains power is 220V, and the 220V mains power includes a first output terminal and a second output terminal; A power supply circuit, wherein the input terminal of the power supply circuit is connected to the first output terminal and the first output terminal respectively, and the output terminal of the power supply circuit outputs DC12V and DC5V respectively. A wireless receiving circuit, wherein the wireless receiving circuit is used to receive wireless control signals; The main control circuit has its power supply terminal electrically connected to DC5V and its control terminal electrically connected to the output terminal of the wireless receiving circuit. The main control circuit is used to output control signals. A driving circuit, wherein the input terminal of the driving circuit is electrically connected to the output terminal of the main control circuit; An air curtain motor M is provided, with one input terminal electrically connected to the output terminal of the drive circuit, and the other input terminal electrically connected to the first output terminal of the 220V AC mains power.

2. The wireless control circuit for an air curtain machine according to claim 1, characterized in that: The power supply circuit includes a rectifier bridge and a voltage conversion circuit; the input terminal of the rectifier bridge is electrically connected to the first output terminal and the second output terminal respectively, and the output terminal of the rectifier bridge is used to output DC12V; the input terminal of the voltage conversion circuit is electrically connected to the output terminal of the rectifier bridge and converts DC12V to DC5V.

3. The wireless control circuit for an air curtain machine according to claim 2, characterized in that: The voltage conversion circuit comprises a 78L05 chip and peripheral circuitry for the 78L05 chip; the input terminal of the 78L05 chip is electrically connected to the output terminal of the rectifier bridge.

4. The wireless control circuit for an air curtain machine according to claim 3, characterized in that: The wireless receiving circuit includes an antenna ANT, a capacitor C4, an inductor L, a diode D5, a resistor R1, a resistor R4, a resistor R2, a resistor R3, and a transistor Q1. The antenna ANT is grounded via capacitor C4. The two ends of the inductor L are electrically connected to the two ends of the capacitor C4, forming an oscillation circuit. One end of the diode D5 is electrically connected to the center tap of the inductor L. The other end of the diode D5 is electrically connected to one end of the capacitor C5, one end of the resistor R1, one end of the resistor R3, and the base of the transistor Q1. The other ends of the capacitor C5 and the other end of the resistor R1 are both grounded. The other end of the resistor R3 is electrically connected to the collector of the transistor Q1. The collector of the transistor Q1 is electrically connected to the output terminal of the 78L05 chip via resistor R4. One emitter of the transistor Q1 is grounded via resistor R2, and the other is electrically connected to a control terminal of the main control circuit.

5. The wireless control circuit for an air curtain machine according to claim 4, characterized in that: The main control circuit includes an MDT2005 chip and peripheral circuitry for the MDT2005 chip; pin 3 of the MDT2005 chip is electrically connected to the output terminal of the 78L05 chip, and pin 9 of the MDT2005 chip is electrically connected to the collector of transistor Q1.

6. The wireless control circuit for an air curtain machine according to claim 5, characterized in that: The driving circuit includes diode D6, capacitor C13, resistors R9 and R10, a ULN2003A chip, resistor R11, diode D7, and relay RELAY. One end of diode D6 is electrically connected to pin 10 of the MDT2005 chip, and the other end of diode D6 is electrically connected to pin 4 of the ULN2003A chip via resistor R10. One end of resistor R9 and one end of capacitor C13 are both electrically connected to one end of resistor R10 and grounded. Pin 1 of the N2003A chip is electrically connected to pin 10 of the MDT2005 chip; pin 9 of the ULN2003A chip is electrically connected to the output of the rectifier bridge; one end of the resistor R11 is electrically connected to pin 9 of the ULN2003A chip; the other end of the resistor R11 is electrically connected via diode D7 to one end of the relay RELAY and pin 16 of the ULN2003A chip; the other end of the relay RELAY is electrically connected to one output of the rectifier bridge.

7. The wireless control circuit for an air curtain machine according to claim 6, characterized in that: The relay RELAY also includes a normally open switch S, one end of which is electrically connected to the input terminal of the air curtain motor M, and the other end of which is electrically connected to the second terminal of the 220V AC mains power.

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