Electromechanical control mechanism of an oxygen generator

Abstract

The utility model relates to an electromechanical control mechanism of oxygen generator, including control circuit, gas pump drive circuit, double tower drive circuit, display drive circuit and setting circuit electric connection respectively with control circuit, the output of gas pump drive circuit and compressor assembly's power supply relay electric connection, the output of double tower drive circuit and the solenoid valve electric connection of gas collection A tower and gas collection B tower, the output of display drive circuit and display screen electric connection, setting circuit is used for setting compressor working time and the inflation time of gas collection A tower and gas collection B tower. Still include fan drive circuit, communication circuit, bee calling organ and burning interface, communication circuit is used for with another one or more oxygen generator constitutes oxygen generator group and mutual communication. The whole cost of this scheme drops obviously, and the performance and work are stable and reliable, easy to operate and maintain, are suitable for mass production, bring the hope to the oxygen generator function popularization to ordinary family and public place.

Description

Technical Field

[0001] This utility model relates to the technical field of oxygen generator products, and in particular to an electromechanical control mechanism for an oxygen generator. Background Technology

[0002] As time goes by and people's living standards continue to improve, people are paying more attention to their health and taking more effective measures to prevent diseases. Currently, oxygen therapy is being promoted. This allows people to increase the oxygen content in their daily lives, improving their quality of life. As a result, the market share of oxygen concentrators will gradually increase, and they will generally improve people's quality of life. In addition, oxygen concentrators also play a significant role in medicine. They are essential for the treatment of some respiratory and lung diseases.

[0003] However, existing oxygen concentrators still have the following drawbacks:

[0004] (1) The electromechanical structure has a high cost, resulting in expensive product prices;

[0005] (2) Due to the high price, it is not possible to enter ordinary homes, hotels, activity centers and gyms and other public places;

[0006] (3) The efficiency of oxygen production needs to be improved.

[0007] To overcome the aforementioned problems, we have invented an electromechanical control mechanism for an oxygen generator, which optimizes and improves existing oxygen generators. Utility Model Content

[0008] The purpose of this invention is to address the problems of existing oxygen concentrators, such as high electromechanical structure costs leading to expensive products, inaccessibility to ordinary households and public places, and insufficient oxygen production efficiency. The specific solution is as follows:

[0009] An electromechanical control mechanism for an oxygen concentrator includes a control circuit, a pump drive circuit, a dual-tower drive circuit, a display drive circuit, and a setting circuit, all electrically connected to the control circuit. The output of the pump drive circuit is electrically connected to a power relay of the compressor assembly. The output of the dual-tower drive circuit is electrically connected to the solenoid valves of gas collecting tower A and gas collecting tower B. The output of the display drive circuit is electrically connected to a display screen. The setting circuit is used to set the compressor operating time and the filling time of gas collecting tower A and gas collecting tower B.

[0010] Furthermore, the control circuit includes a control chip U1, which is an STM8S003F3P6 chip, and the electromechanical control mechanism also includes a power supply circuit for supplying power to each circuit.

[0011] Furthermore, the air pump drive circuit includes a resistor R52, one end of which is electrically connected to pin 20 (JK1) of the control chip U1. The other end of resistor R52 is electrically connected to one end of resistor R53 and the base of transistor Q6. The other end of resistor R53 is grounded to the emitter of transistor Q6. The collector of transistor Q6 is simultaneously electrically connected to the anode of diode D13, the cathode of LED8, and pin 2 of the power relay K1 of the compressor assembly. The anode of LED8 is connected in series with resistor R54 and simultaneously electrically connected to the cathode of diode D13, pin 4 of power relay K1, and the +12V power supply terminal of the power circuit. Pin 3 of power relay K1 is electrically connected to the AC220V_L terminal of the power circuit. Pin 5 of power relay K1 is electrically connected to pin 1 of sockets CN8, CN7, and CN6. Pin 3 of sockets CN8, CN7, and CN6 is electrically connected to the AC220VN terminal of the power circuit. Pin 1 of power relay K1 is left floating.

[0012] Furthermore, the dual-tower drive circuit includes a resistor R46, one end of which is electrically connected to pin 1 (DCF2) of the control chip U1; the other end of resistor R46 is electrically connected to one end of resistor R47 and the base of transistor Q4; the other end of resistor R47 is grounded to the emitter of transistor Q4; the collector of transistor Q4 is connected in series with resistor R45 and simultaneously to one end of resistor R44 and the base of transistor Q8; the other end of resistor R44 and the emitter of transistor Q8 are electrically connected to the +12V power supply terminal of the power supply circuit; the collector of transistor Q8 is simultaneously connected to the negative terminal of diode D11, one end of resistor R48 and pin 2 of socket CN1; the other end of resistor R48 is electrically connected to the positive terminal of LED6; the negative terminal of LED6, the positive terminal of diode D11, and pins 1 and 3 of socket CN1 are simultaneously grounded; dual-tower drive The circuit also includes a resistor R41, one end of which is electrically connected to pin 10 (DCF1) of the control chip U1. The other end of resistor R41 is electrically connected to one end of resistor R42 and the base of transistor Q3. The other end of resistor R42 is grounded to the emitter of transistor Q3. The collector of transistor Q3 is connected in series with resistor R40 and simultaneously to one end of resistor R39 and the base of transistor Q7. The other end of resistor R39 and the emitter of transistor Q7 are electrically connected to the +12V power supply terminal of the power supply circuit. The collector of transistor Q7 is simultaneously connected to the negative terminal of diode D10, one end of resistor R43 and pin 4 of socket CN1. The other end of resistor R43 is electrically connected to the positive terminal of LED5. The negative terminal of LED5 and the positive terminal of diode D10 are simultaneously grounded. Socket CN1 is electrically connected to the solenoid valves of gas collecting tower A and gas collecting tower B.

[0013] Furthermore, the setting circuit includes resistors R56, R57, R58, R55 and capacitor C37, one end of which is electrically connected to the +5V power supply terminal of the power supply circuit. The other end of resistor R56 is electrically connected to one end of tactile switch SW3 and pin 12 (KEY1) of control chip U1. The other end of resistor R57 is electrically connected to one end of tactile switch SW2 and pin 11 (KEY2) of control chip U1. The other end of resistor R58 is electrically connected to one end of tactile switch SW1 and pin 6 (KEY3) of control chip U1. The other end of resistor R55 is electrically connected to pin 1 of socket CN10 and pin 14 (TEXT) of control chip U1. The other ends of tactile switches SW3, SW2, SW1 and capacitor C37 are grounded to pin 2 of socket CN10.

[0014] Furthermore, the sockets CN8, CN7, and CN6 are simultaneously electrically connected to the compressors of the three oxygen concentrators. An adjustable resistor RV2 is connected to pins 1 and 3 of socket CN6, while pin 2 of sockets CN8, CN7, and CN6 is left unconnected. The electromechanical control mechanism also includes a fan drive circuit, a communication circuit, a buzzer, and a programming interface, all electrically connected to the control circuit. The fan drive circuit is electrically connected to the cooling fan, and the communication circuit is used to form an oxygen concentrator group with one or more other oxygen concentrators and communicate with each other.

[0015] Furthermore, the fan drive circuit includes a resistor R49, one end of which is electrically connected to pin 19 (JK2) of the control chip U1. The other end of resistor R49 is electrically connected to one end of resistor R50 and the base of transistor Q5. The other end of resistor R50 is grounded to the emitter of transistor Q5. The collector of transistor Q5 is simultaneously electrically connected to the anode of diode D12, the cathode of LED7, and pin 2 of relay K2. The anode of LED7 is connected in series with resistor R51 and simultaneously electrically connected to the cathode of diode D12, pin 4 of relay K2, and the +12V power supply terminal of the power supply circuit. Pin 3 of relay K2 is electrically connected to the AC220V_L terminal of the power supply circuit. Pin 5 of relay K2 is electrically connected to pin 1 of socket CN5. Pin 3 of socket CN5 is electrically connected to the AC220VN terminal of the power supply circuit. Pin 1 of relay K2 is left floating.

[0016] Furthermore, the communication circuit includes a resistor R32, one end of which is electrically connected to pin 2 (TXD) of the control chip U1 and the negative terminal of the LED4. The other end of resistor R32 is electrically connected to the base of transistor Q2. The positive terminal of LED4 is connected in series with resistor R30 and then electrically connected to the +5V power supply terminal of the power supply circuit. The collector of transistor Q2 is simultaneously electrically connected to one end of resistor R31 and pins 2 and 3 of integrated circuit U3. Pin 1 of integrated circuit U3 is simultaneously electrically connected to one end of resistor R33 and capacitor C31 and pin 3 (RXD) of control chip U1. The other end of resistor R33 and pin 8 of integrated circuit U3 are electrically connected to the +5V power supply terminal of the power supply circuit. The other end of resistor R31 is connected to resistor R32. 4. Connect one end of capacitor C32 and the +5V power supply terminal. Connect the other end of resistor R34 to pin 6 of integrated circuit U3 and one end of resistor R35. Connect the other end of resistor R35 to one end of resistor R37, the negative terminal of diode TVS2, and pin 2 of sockets CN2 and CN3. Connect pin 7 of integrated circuit U3 to one end of resistors R36 and R38. Connect the other end of resistor R36 to the other end of resistor R37, the negative terminal of diode TVS1, and pin 1 of sockets CN2 and CN3. Connect the emitter of transistor Q2, the other end of capacitors C31 and C32, the other end of resistor R38, pins 4 and 5 of integrated circuit U3, and the positive terminals of diodes TVS1 and TVS2 to ground.

[0017] Furthermore, the programming interface is a socket P3. Pin 1 of the socket P3 is electrically connected to pin 4 (MPD_RST) of the control chip U1, pin 2 of the socket P3 is grounded, pin 3 of the socket P3 is electrically connected to pin 18 (SWIN) of the control chip U1, and pin 4 of the socket P3 is electrically connected to the +5V power supply terminal of the power supply circuit.

[0018] Furthermore, the display driving circuit includes a digital tube driver chip U2, wherein pins 6, 7, and 8 of U2 are electrically connected to pins 17 (DIO), 16 (CLK), and 15 (STB) of the control chip U1, respectively; pins 1 and 2 of U2 are electrically connected to pins 9 (GRID4) and 12 (GRID3) of the digital tube LED2, respectively; pins 3 and 22 of U2 are grounded; pins 4 and 5 of U2 are electrically connected to pins 5 (GRID2) and 10 (GRID1) of the digital tube LED1, respectively; and pins 6, 7, and 8 of U2 are connected to resistors R59, R60, and R61, respectively. One end of U2 is electrically connected. The other ends of resistors R59, R60, and R61, along with pin 11 of U2 and one end of capacitor C38, are simultaneously electrically connected to the +5V power supply terminal of the power supply circuit. The other end of capacitor C38 is grounded. Pins 9 and 10 of U2 are left floating. Pin 12 of U2 is connected in series with resistor R62 and simultaneously to pins 11 (DB0) of LED2 and LED3 and pin 7 (DB0) of LED1. Pin 13 of U2 is connected in series with resistor R63 and simultaneously to pins 7 (DB1) of LED2 and LED3 and pin 6 (DB1) of LED1. Pin 14 of U2... Pin 15 of U2 is connected in series with resistor R64 and then electrically connected to pin 4 (DB2) of LEDs 1, 2, and 3 of the digital tube. Pin 15 of U2 is connected in series with resistor R65 and then electrically connected to pin 2 (DB3) of LEDs 2 and 3, and pin 1 (DB3) of LED 1. Pin 16 of U2 is connected in series with resistor R66 and then electrically connected to pin 1 (DB4) of LEDs 2 and 3, and pin 3 (DB4) of LED 1. Pin 17 of U2 is connected in series with resistor R67 and then electrically connected to pin 10 (DB5) of LEDs 2 and 3, and pin 8 (DB5) of LED 1. Pin 18 of U2 is connected in series with resistor R68 and is simultaneously electrically connected to pin 5 (DB6) of LED2 and LED3, and pin 9 (DB6) of LED1. Pin 19 of U2 is connected in series with resistor R69 and is simultaneously electrically connected to pin 3 (DB7) of LED2 and LED3, and pin 2 (DB7) of LED1. Pins 20 and 21 of U2 are electrically connected to pins 8 (GRID8) and 9 (GRID7) of LED3, respectively. Pins 23 and 24 of U2 are electrically connected to pin 12 (GRID6) of LED3 and pin 8 (GRID5) of LED2, respectively. The display screen is composed of LED1, LED2, and LED3.

[0019] In summary, the technical solution of this utility model has the following beneficial effects:

[0020] This invention uses an STM8S003F3P6 microcontroller as the control chip U1, which features high performance, good stability, and low cost. It controls the power relay of the compressor and the solenoid valves of gas collecting towers A and B, effectively controlling the compressor's operating time and the charging time of gas collecting towers A and B. Three LED digital tubes are used as the human-machine interface, eliminating the need for mobile phones or network signals, making it particularly suitable for the elderly and children. LED1 displays the operating mode and allows setting the mode via a dedicated button (touch switch); LED2 displays the degassing time of gas collecting towers A and B and allows setting the degassing time via a dedicated button; LED3 displays the charging time of gas collecting towers A and B and allows setting the charging time via a dedicated button. The circuit is simple to operate, the digital tube displays are clear, and users can easily understand and monitor the oxygen concentrator's operating status and usage. The LED digital tubes are affordable, and the driver program is simple. The digital tube driver chip U2 in this solution uses the TM1639 chip, which is a chip with a keyboard scanning interface. Compared with the traditional method of adding external circuits or using dynamic keyboard scanning, it can reduce costs and prevent the impact on program running speed. Most LED driver control circuit chips on the market are relatively expensive, which is not conducive to the development of small devices. However, the TM1639 is inexpensive, and the cost can be well controlled when the product is mass-produced. Moreover, it is reliable and durable. After experimental testing, the oxygen generation effect is best when the filling time of gas collection tower A and gas collection tower B is adjusted to 6.5 seconds and the degassing time to 0.1 seconds. This solution is equipped with a buzzer, which can alarm to prompt inappropriate parameter values ​​entered during the setting process. In addition, it can also alarm to prompt if there is a malfunction or abnormality during the use of the oxygen concentrator. Moreover, it will also alarm to remind the operator that the filling time has been reached and to pay attention to degassing when the filling time reaches the originally set filling time. In order to prevent the heat generated by the oxygen concentrator during use, this solution is designed with a cooling fan to ensure more stable and safe operation. This solution incorporates a communication circuit, facilitating communication with other oxygen concentrators to form a cluster. The power relay used is a domestically produced SRD-12VDC-SL-C relay, designed and developed by Songle Company. It features a small size, can operate in environments of +85℃ / +105℃, and offers selectable load options. In summary, this solution significantly reduces overall cost, provides stable and reliable performance, is easy to operate and maintain, and is suitable for mass production, bringing hope for the widespread adoption of oxygen concentrators in ordinary households and public places. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a block diagram of the electromechanical control mechanism of an oxygen generator according to the present invention;

[0023] Figure 2 This is a circuit diagram of the control circuit of this utility model;

[0024] Figure 3 This is a circuit diagram of the air pump drive circuit of this utility model;

[0025] Figure 4 This is a circuit diagram of the dual-tower drive circuit of this utility model;

[0026] Figure 5 This is a circuit diagram of the circuit setting circuit of this utility model;

[0027] Figure 6 This is a circuit diagram of the fan drive circuit of this utility model;

[0028] Figure 7 This is a circuit diagram of the communication circuit of this utility model;

[0029] Figure 8 This is a circuit diagram of the programming interface of this utility model;

[0030] Figure 9 This is a circuit diagram of the display driving circuit of this utility model;

[0031] Figure 10 This is a pin diagram of the display screen of this utility model;

[0032] Figure 11 This is a circuit diagram of the power supply circuit of this utility model;

[0033] Figure 12 This is a block diagram illustrating the principle of an oxygen concentrator. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 scope of protection of the present utility model.

[0035] like Figures 1 to 11 As shown, an electromechanical control mechanism for an oxygen concentrator includes a control circuit, a pump drive circuit, a dual-tower drive circuit, a display drive circuit, and a setting circuit, all electrically connected to the control circuit. The output of the pump drive circuit is electrically connected to the power relay of the compressor assembly. The output of the dual-tower drive circuit is electrically connected to the solenoid valves of gas collection tower A and gas collection tower B. The output of the display drive circuit is electrically connected to the display screen. The setting circuit is used to set the compressor operating time and the filling time of gas collection tower A and gas collection tower B. The electromechanical control mechanism also includes a fan drive circuit, a communication circuit, a buzzer, and a programming interface, all electrically connected to the control circuit. The fan drive circuit is electrically connected to a cooling fan. The communication circuit is used to form an oxygen concentrator group with one or more other oxygen concentrators and communicate with each other.

[0036] Specifically, the control circuit includes a control chip U1, which is an STM8S003F3P6 chip. The electromechanical control mechanism also includes a power supply circuit for supplying power to each circuit. The buzzer emits sound through the TEXT1 control signal on pin 13 of the control chip U1.

[0037] Specifically, the air pump drive circuit includes a resistor R52, one end of which is electrically connected to pin 20 (JK1) of the control chip U1; the other end of resistor R52 is electrically connected to one end of resistor R53 and the base of transistor Q6; the other end of resistor R53 is grounded to the emitter of transistor Q6; the collector of transistor Q6 is simultaneously electrically connected to the anode of diode D13, the cathode of LED8, and pin 2 of the power relay K1 of the compressor assembly; the anode of LED8 is connected in series with resistor R54 and simultaneously to the cathode of diode D13, pin 4 of power relay K1, and also to the +12V power supply terminal of the power circuit; pin 3 of power relay K1 is electrically connected to the AC220V_L terminal of the power circuit; pin 5 of power relay K1 is electrically connected to pin 1 of sockets CN8, CN7, and CN6; pin 3 of sockets CN8, CN7, and CN6 is electrically connected to the AC220VN terminal of the power circuit; and pin 1 of power relay K1 is left floating. Sockets CN8, CN7, and CN6 are electrically connected to the compressors of three oxygen concentrators simultaneously. Socket CN6 has adjustable resistors RV2 connected to pins 1 and 3, while pin 2 of sockets CN8, CN7, and CN6 is left floating. The power relay K1 is a domestically produced SRD-12VDC-SL-C relay.

[0038] Specifically, the dual-tower drive circuit includes a resistor R46, one end of which is electrically connected to pin 1 (DCF2) of the control chip U1. The other end of resistor R46 is electrically connected to one end of resistor R47 and the base of transistor Q4. The other end of resistor R47 is grounded to the emitter of transistor Q4. The collector of transistor Q4 is connected in series with resistor R45 and simultaneously to one end of resistor R44 and the base of transistor Q8. The other end of resistor R44 and the emitter of transistor Q8 are electrically connected to the +12V power supply terminal of the power supply circuit. The collector of transistor Q8 is simultaneously connected to the negative terminal of diode D11, one end of resistor R48 and pin 2 of socket CN1. The other end of resistor R48 is electrically connected to the positive terminal of LED6. The negative terminal of LED6, the positive terminal of diode D11, and pins 1 and 3 of socket CN1 are simultaneously grounded. The dual-tower drive circuit also includes a resistor R41, one end of which is electrically connected to pin 10 (DCF1) of the control chip U1. The other end of resistor R41 is electrically connected to one end of resistor R42 and the base of transistor Q3. The other end of resistor R42 is grounded to the emitter of transistor Q3. The collector of transistor Q3 is connected in series with resistor R40 and simultaneously to one end of resistor R39 and the base of transistor Q7. The other end of resistor R39 and the emitter of transistor Q7 are electrically connected to the +12V power supply terminal of the power supply circuit. The collector of transistor Q7 is also electrically connected to the cathode of diode D10, one end of resistor R43 and pin 4 of socket CN1, and the other end of resistor R43 is electrically connected to the anode of LED5. The cathode of LED5 and the anode of diode D10 are both grounded. Socket CN1 is electrically connected to the solenoid valves of gas collecting towers A and B. The solenoid valve includes solenoid valve A for controlling the gas filling of gas collecting tower A and solenoid valve B for controlling the gas filling of gas collecting tower B.

[0039] Specifically, the circuit setup includes resistors R56, R57, R58, and R55, and capacitor C37, one end of which is electrically connected to the +5V power supply terminal of the power supply circuit. The other end of resistor R56 is simultaneously connected to one end of tactile switch SW3 and pin 12 (KEY1) of control chip U1. The other end of resistor R57 is simultaneously connected to one end of tactile switch SW2 and pin 11 (KEY2) of control chip U1. The other end of resistor R58 is simultaneously connected to one end of tactile switch SW1 and pin 6 (KEY3) of control chip U1. The other end of resistor R55 is simultaneously connected to pin 1 of socket CN10 and pin 14 (TEXT) of control chip U1. The other ends of tactile switches SW3, SW2, and SW1, and capacitor C37, and pin 2 of socket CN10 are simultaneously grounded. Socket CN10 is used to connect a high-voltage disconnect switch (not shown in the diagram).

[0040] Specifically, the fan drive circuit includes a resistor R49, one end of which is electrically connected to pin 19 (JK2) of the control chip U1. The other end of resistor R49 is electrically connected to one end of resistor R50 and the base of transistor Q5. The other end of resistor R50 is grounded to the emitter of transistor Q5. The collector of transistor Q5 is simultaneously electrically connected to the anode of diode D12, the cathode of LED7, and pin 2 of relay K2. The anode of LED7, connected in series with resistor R51, is simultaneously electrically connected to the cathode of diode D12, pin 4 of relay K2, and the +12V power supply terminal of the power circuit. Pin 3 of relay K2 is electrically connected to the AC220V_L terminal of the power circuit. Pin 5 of relay K2 is electrically connected to pin 1 of socket CN5. Pin 3 of socket CN5 is electrically connected to the AC220VN terminal of the power circuit. Pin 1 of relay K2 is left floating. Relay K2 is a domestically produced SRD-12VDC-SL-C relay.

[0041] Specifically, the communication circuit includes a resistor R32, one end of which is electrically connected to pin 2 (TXD) of the control chip U1 and the negative terminal of the LED4. The other end of resistor R32 is electrically connected to the base of transistor Q2. The positive terminal of LED4 is connected in series with resistor R30 and then electrically connected to the +5V power supply terminal of the power supply circuit. The collector of transistor Q2 is simultaneously electrically connected to one end of resistor R31 and pins 2 and 3 of integrated circuit U3. Pin 1 of integrated circuit U3 is simultaneously electrically connected to one end of resistor R33 and capacitor C31 and pin 3 (RXD) of the control chip U1. The other end of resistor R33 and pin 8 of integrated circuit U3 are electrically connected to the +5V power supply terminal of the power supply circuit. The other end of resistor R31 is connected to resistor R34 and... One end of capacitor C32 is electrically connected to the +5V power supply terminal. The other end of resistor R34 is electrically connected to pin 6 of integrated circuit U3 and one end of resistor R35. The other end of resistor R35 is also electrically connected to one end of resistor R37, the negative terminal of diode TVS2, and pin 2 of sockets CN2 and CN3. Pin 7 of integrated circuit U3 is electrically connected to one end of resistors R36 and R38. The other end of resistor R36 is also electrically connected to the other end of resistor R37, the negative terminal of diode TVS1, and pin 1 of sockets CN2 and CN3. The emitter of transistor Q2, the other end of capacitors C31 and C32, the other end of resistor R38, pins 4 and 5 of integrated circuit U3, and the positive terminals of diodes TVS1 and TVS2 are all grounded. Integrated circuit U3 uses model ECH485.

[0042] Specifically, the programming interface is socket P3. Pin 1 of socket P3 is electrically connected to pin 4 of control chip U1 (MPD_RST). Pin 2 of socket P3 is grounded. Pin 3 of socket P3 is electrically connected to pin 18 of control chip U1 (SWIN). Pin 4 of socket P3 is electrically connected to the +5V power supply terminal of the power circuit.

[0043] Specifically, the display driving circuit includes a digital tube driver chip U2. Pins 6, 7, and 8 of U2 are electrically connected to pins 17 (DIO), 16 (CLK), and 15 (STB) of the control chip U1, respectively. Pins 1 and 2 of U2 are electrically connected to pins 9 (GRID4) and 12 (GRID3) of the digital tube LED2, respectively. Pins 3 and 22 of U2 are grounded. Pins 4 and 5 of U2 are electrically connected to pins 5 (GRID2) and 10 (GRID1) of the digital tube LED1, respectively. Pins 6, 7, and 8 of U2 are connected to resistors R59, R60, and R61, respectively. The terminals are electrically connected as follows: the other ends of resistors R59, R60, and R61, pin 11 of U2, and one end of capacitor C38 are simultaneously connected to the +5V power supply terminal of the power supply circuit. The other end of capacitor C38 is grounded. Pins 9 and 10 of U2 are left floating. Pin 12 of U2 is connected in series with resistor R62 and simultaneously to pins 11 (DB0) of LED2 and LED3 and pin 7 (DB0) of LED1. Pin 13 of U2 is connected in series with resistor R63 and simultaneously to pins 7 (DB1) of LED2 and LED3 and pin 6 (DB1) of LED1. Pin 14 of U2... After connecting the series resistor R64, pin 4 (DB2) of LED1, LED2, and LED3 of the digital tube is electrically connected to both LED1 and LED2. Pin 15 of U2, after connecting the series resistor R65, is electrically connected to pin 2 (DB3) of LED2 and LED3, and pin 1 (DB3) of LED1. Pin 16 of U2, after connecting the series resistor R66, is electrically connected to pin 1 (DB4) of LED2 and LED3, and pin 3 (DB4) of LED1. Pin 17 of U2, after connecting the series resistor R67, is electrically connected to pin 10 (DB5) of LED2 and LED3, and pin 8 (DB5) of LED1. Pin 18 of U2 is connected in series with resistor R68 and simultaneously to pins 5 (DB6) of LED2 and LED3, and pin 9 (DB6) of LED1. Pin 19 of U2 is connected in series with resistor R69 and simultaneously to pins 3 (DB7) of LED2 and LED3, and pin 2 (DB7) of LED1. Pins 20 and 21 of U2 are connected to pins 8 (GRID8) and 9 (GRID7) of LED3, respectively. Pins 23 and 24 of U2 are connected to pin 12 (GRID6) of LED3 and pin 8 (GRID5) of LED2, respectively. The display screen consists of LED1, LED2, and LED3. LED1 displays the operating mode, and LED2 displays the venting time of gas collecting tower A and gas collecting tower B (Note: Venting time refers to the time for nitrogen to be released externally; see [link to relevant documentation]). Figure 12 As shown, LED3 is used to display the charging time of gas collecting tower A and gas collecting tower B. The driver chip U2 of the digital tube uses the TM1639 chip. The model of digital tube LED1 is 4201ES-1, and the models of digital tubes LED2 and LED3 are both 4301AS-1.

[0044] The power supply circuit of this solution is as follows: Figure 11 As shown, this is existing technology, and its specific working principle will not be described in detail here.

[0045] like Figure 12 The diagram shown is a block diagram of the principle of an oxygen generator. Some of its components are already included in the block diagram of the electromechanical control mechanism of this solution and are considered prior art, so they will not be described in detail here.

[0046] The oxygen generator in this solution is a molecular sieve oxygen generator. The working principle of a molecular sieve oxygen generator is to utilize the selective adsorption differences of zeolite molecular sieves for nitrogen and oxygen in the air, achieving oxygen separation through a cyclic process of physical adsorption and desorption. This is existing technology, and the specific structure and working process of the molecular sieve oxygen generator will not be detailed here.

[0047] The working principle of this solution is briefly described as follows: A reasonable allocation of the number of oxygen concentrators and their operating time is used. The operating mode is set via touch switches SW1-SW3 combined with the LED display on the digital tube. Each operating mode corresponds to a specific compressor operating time and stop time (because the compressor generates heat and cannot operate continuously). The control program software is pre-designed and programmed into the control chip U1 via the P3 programming interface, allowing the user to select the desired operating mode. Precise control of the filling time of gas collection towers A and B is crucial. Since the oxygen concentrator uses two independent gas collection towers (A and B) to store gas, we need to switch towers after one (e.g., tower A) is filled with oxygen, allowing the other tower (e.g., tower B) to continue collecting oxygen. This prevents oxygen from continuously filling one tower, which could lead to container explosion or component damage. Therefore, we need to set the inflation time for gas collecting towers A and B. This is done using touch switches SW1-SW3, combined with the LED3 display, to set the inflation time and an upper limit. When the upper limit is reached, a buzzer will sound an alarm to warn the operator. Additionally, we need to set the deflation time using touch switches SW1-SW3, combined with the LED2 display. From the above description... Figure 12 As shown in the block diagram of an oxygen concentrator, the nitrogen in the compressed air needs to be released during the oxygen production process, leaving behind the oxygen we need.

[0048] In summary, the technical solution of this utility model has the following beneficial effects:

[0049] This invention uses an STM8S003F3P6 microcontroller as the control chip U1, which features high performance, good stability, and low cost. It controls the power relay of the compressor and the solenoid valves of gas collecting towers A and B, effectively controlling the compressor's operating time and the charging time of gas collecting towers A and B. Three LED digital tubes are used as the human-machine interface, eliminating the need for mobile phones or network signals, making it particularly suitable for the elderly and children. LED1 displays the operating mode and allows setting the mode via a dedicated button (touch switch); LED2 displays the degassing time of gas collecting towers A and B and allows setting the degassing time via a dedicated button; LED3 displays the charging time of gas collecting towers A and B and allows setting the charging time via a dedicated button. The circuit is simple to operate, the digital tube displays are clear, and users can easily understand and monitor the oxygen concentrator's operating status and usage. The LED digital tubes are affordable, and the driver program is simple. The digital tube driver chip U2 in this solution uses the TM1639 chip, which is a chip with a keyboard scanning interface. Compared with the traditional method of adding external circuits or using dynamic keyboard scanning, it can reduce costs and prevent the impact on program running speed. Most LED driver control circuit chips on the market are relatively expensive, which is not conducive to the development of small devices. However, the TM1639 is inexpensive, and the cost can be well controlled when the product is mass-produced. Moreover, it is reliable and durable. After experimental testing, the oxygen generation effect is best when the filling time of gas collection tower A and gas collection tower B is adjusted to 6.5 seconds and the degassing time to 0.1 seconds. This solution is equipped with a buzzer, which can alarm to prompt inappropriate parameter values ​​entered during the setting process. In addition, it can also alarm to prompt if there is a malfunction or abnormality during the use of the oxygen concentrator. Moreover, it will also alarm to remind the operator that the filling time has been reached and to pay attention to degassing when the filling time reaches the originally set filling time. In order to prevent the heat generated by the oxygen concentrator during use, this solution is designed with a cooling fan to ensure more stable and safe operation. This solution incorporates a communication circuit, facilitating communication with other oxygen concentrators to form a cluster. The power relay used is a domestically produced SRD-12VDC-SL-C relay, designed and developed by Songle Company. It features a small size, can operate in environments of +85℃ / +105℃, and offers selectable load options. In summary, this solution significantly reduces overall cost, provides stable and reliable performance, is easy to operate and maintain, and is suitable for mass production, bringing hope for the widespread adoption of oxygen concentrators in ordinary households and public places.

[0050] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. An electromechanical control mechanism for an oxygen generator, characterized in that: The system includes a control circuit, an air pump drive circuit, a dual-tower drive circuit, a display drive circuit, and a setting circuit, all electrically connected to the control circuit. The output of the air pump drive circuit is electrically connected to the power relay of the compressor assembly. The output of the dual-tower drive circuit is electrically connected to the solenoid valves of gas collecting tower A and gas collecting tower B. The output of the display drive circuit is electrically connected to the display screen. The setting circuit is used to set the compressor operating time and the charging time of gas collecting tower A and gas collecting tower B.

2. The electromechanical control mechanism of an oxygen generator according to claim 1, characterized in that: The control circuit includes a control chip U1, which is an STM8S003F3P6 chip. The electromechanical control mechanism also includes a power supply circuit for supplying power to each circuit.

3. The electromechanical control mechanism of an oxygen generator according to claim 2, characterized in that: The air pump drive circuit includes a resistor R52, one end of which is electrically connected to pin 20 (JK1) of the control chip U1. The other end of resistor R52 is electrically connected to one end of resistor R53 and the base of transistor Q6. The other end of resistor R53 is grounded to the emitter of transistor Q6. The collector of transistor Q6 is simultaneously electrically connected to the anode of diode D13, the cathode of LED8, and pin 2 of the power relay K1 of the compressor assembly. The anode of LED8 is connected in series with resistor R54 and simultaneously to the cathode of diode D13, pin 4 of power relay K1, and the +12V power supply terminal of the power circuit. Pin 3 of power relay K1 is electrically connected to the AC220V_L terminal of the power circuit. Pin 5 of power relay K1 is electrically connected to pin 1 of sockets CN8, CN7, and CN6. Pin 3 of sockets CN8, CN7, and CN6 is electrically connected to the AC220VN terminal of the power circuit. Pin 1 of power relay K1 is left floating.

4. The electromechanical control mechanism of an oxygen generator according to claim 2, characterized in that: The dual-tower drive circuit includes a resistor R46, one end of which is electrically connected to pin 1 (DCF2) of the control chip U1. The other end of resistor R46 is electrically connected to one end of resistor R47 and the base of transistor Q4. The other end of resistor R47 is grounded to the emitter of transistor Q4. The collector of transistor Q4 is connected in series with resistor R45 and simultaneously to one end of resistor R44 and the base of transistor Q8. The other end of resistor R44 and the emitter of transistor Q8 are electrically connected to the +12V power supply terminal of the power supply circuit. The collector of transistor Q8 is simultaneously connected to the cathode of diode D11, one end of resistor R48, and pin 2 of socket CN1. The other end of resistor R48 is electrically connected to the anode of LED6. The cathode of LED6, the anode of diode D11, and pins 1 and 3 of socket CN1 are simultaneously grounded. It also includes a resistor R41, one end of which is electrically connected to pin 10 (DCF1) of the control chip U1; the other end of resistor R41 is electrically connected to one end of resistor R42 and the base of transistor Q3; the other end of resistor R42 is grounded to the emitter of transistor Q3; the collector of transistor Q3 is connected in series with resistor R40 and simultaneously to one end of resistor R39 and the base of transistor Q7; the other end of resistor R39 is electrically connected to the emitter of transistor Q7 and the +12V power supply terminal of the power supply circuit; the collector of transistor Q7 is simultaneously connected to the negative terminal of diode D10, one end of resistor R43 and pin 4 of socket CN1; the other end of resistor R43 is electrically connected to the positive terminal of light-emitting diode LED5; the negative terminal of light-emitting diode LED5 and the positive terminal of diode D10 are simultaneously grounded; and socket CN1 is electrically connected to the solenoid valves of gas collecting tower A and gas collecting tower B.

5. The electromechanical control mechanism for an oxygen generator according to claim 2, characterized in that: The circuit configuration includes resistors R56, R57, R58, R55 and capacitor C37, one end of which is electrically connected to the +5V power supply terminal of the power supply circuit. The other end of resistor R56 is electrically connected to one end of tactile switch SW3 and pin 12 (KEY1) of control chip U1. The other end of resistor R57 is electrically connected to one end of tactile switch SW2 and pin 11 (KEY2) of control chip U1. The other end of resistor R58 is electrically connected to one end of tactile switch SW1 and pin 6 (KEY3) of control chip U1. The other end of resistor R55 is electrically connected to pin 1 of socket CN10 and pin 14 (TEXT) of control chip U1. The other ends of tactile switches SW3, SW2, SW1 and capacitor C37 are grounded to pin 2 of socket CN10.

6. The electromechanical control mechanism for an oxygen generator according to claim 3, characterized in that: The sockets CN8, CN7, and CN6 are simultaneously electrically connected to the compressors of three oxygen concentrators. An adjustable resistor RV2 is connected to pins 1 and 3 of socket CN6, while pin 2 of sockets CN8, CN7, and CN6 is left unconnected. The electromechanical control mechanism also includes a fan drive circuit, a communication circuit, a buzzer, and a programming interface, all electrically connected to the control circuit. The fan drive circuit is electrically connected to the cooling fan, and the communication circuit is used to form an oxygen concentrator group with one or more other oxygen concentrators and communicate with each other.

7. The electromechanical control mechanism for an oxygen generator according to claim 6, characterized in that: The fan drive circuit includes a resistor R49, one end of which is electrically connected to pin 19 (JK2) of the control chip U1. The other end of resistor R49 is electrically connected to one end of resistor R50 and the base of transistor Q5. The other end of resistor R50 is grounded to the emitter of transistor Q5. The collector of transistor Q5 is simultaneously electrically connected to the anode of diode D12, the cathode of LED7, and pin 2 of relay K2. The anode of LED7 is connected in series with resistor R51 and simultaneously electrically connected to the cathode of diode D12, pin 4 of relay K2, and the +12V power supply terminal of the power supply circuit. Pin 3 of relay K2 is electrically connected to the AC220V_L terminal of the power supply circuit. Pin 5 of relay K2 is electrically connected to pin 1 of socket CN5. Pin 3 of socket CN5 is electrically connected to the AC220VN terminal of the power supply circuit. Pin 1 of relay K2 is left floating.

8. The electromechanical control mechanism for an oxygen generator according to claim 6, characterized in that: The communication circuit includes a resistor R32, one end of which is electrically connected to pin 2 (TXD) of the control chip U1 and the negative terminal of the LED4. The other end of resistor R32 is electrically connected to the base of transistor Q2. The positive terminal of LED4 is connected in series with resistor R30 and then electrically connected to the +5V power supply terminal of the power supply circuit. The collector of transistor Q2 is simultaneously electrically connected to one end of resistor R31 and pins 2 and 3 of integrated circuit U3. Pin 1 of integrated circuit U3 is simultaneously electrically connected to one end of resistor R33 and capacitor C31 and pin 3 (RXD) of the control chip U1. The other end of resistor R33 and pin 8 of integrated circuit U3 are electrically connected to the +5V power supply terminal of the power supply circuit. The other end of resistor R31 is connected to resistor R34 and... One end of capacitor C32 is electrically connected to the +5V power supply terminal. The other end of resistor R34 is electrically connected to pin 6 of integrated circuit U3 and one end of resistor R35. The other end of resistor R35 is also electrically connected to one end of resistor R37, the negative terminal of diode TVS2, and pin 2 of sockets CN2 and CN3. Pin 7 of integrated circuit U3 is electrically connected to one end of resistors R36 and R38. The other end of resistor R36 is also electrically connected to the other end of resistor R37, the negative terminal of diode TVS1, and pin 1 of sockets CN2 and CN3. The emitter of transistor Q2, the other end of capacitors C31 and C32, the other end of resistor R38, pins 4 and 5 of integrated circuit U3, and the positive terminals of diodes TVS1 and TVS2 are all grounded.

9. The electromechanical control mechanism for an oxygen generator according to claim 6, characterized in that: The programming interface is socket P3. Pin 1 of socket P3 is electrically connected to pin 4 (MPD_RST) of control chip U1. Pin 2 of socket P3 is grounded. Pin 3 of socket P3 is electrically connected to pin 18 (SWIN) of control chip U1. Pin 4 of socket P3 is electrically connected to the +5V power supply terminal of the power supply circuit.

10. The electromechanical control mechanism of an oxygen generator according to claim 2, characterized in that: The display driving circuit includes a digital tube driver chip U2. Pins 6, 7, and 8 of U2 are electrically connected to pins 17 (DIO), 16 (CLK), and 15 (STB) of the control chip U1, respectively. Pins 1 and 2 of U2 are electrically connected to pins 9 (GRID4) and 12 (GRID3) of the digital tube LED2, respectively. Pins 3 and 22 of U2 are grounded. Pins 4 and 5 of U2 are electrically connected to pins 5 (GRID2) and 10 (GRID1) of the digital tube LED1, respectively. Pins 6, 7, and 8 of U2 are electrically connected to one end of resistors R59, R60, and R61, respectively. Resistor R59... The other ends of R60 and R61, pin 11 of U2, and one end of capacitor C38 are simultaneously connected to the +5V power supply terminal of the power supply circuit. The other end of capacitor C38 is grounded. Pins 9 and 10 of U2 are left floating. Pin 12 of U2 is connected in series with resistor R62 and simultaneously to pins 11 (DB0) of LED2 and LED3 and pin 7 (DB0) of LED1. Pin 13 of U2 is connected in series with resistor R63 and simultaneously to pins 7 (DB1) of LED2 and LED3 and pin 6 (DB1) of LED1. Pin 14 of U2 is connected in series with resistor R64 and simultaneously to the power supply terminal of LED2.

1. Connect pin 4 (DB2) of LED2 and LED3 electrically. Connect pin 15 of U2 in series with resistor R65 to pin 2 (DB3) of LED2 and LED3, and pin 1 (DB3) of LED1. Connect pin 16 of U2 in series with resistor R66 to pin 1 (DB4) of LED2 and LED3, and pin 3 (DB4) of LED1. Connect pin 17 of U2 in series with resistor R67 to pin 10 (DB5) of LED2 and LED3, and pin 8 (DB5) of LED1. Connect pin 18 of U2 in series with resistor R68 to pin 2. Pin 5 (DB6) of LED3 and pin 9 (DB6) of LED1 are electrically connected to each other. Pin 19 of U2 is connected in series with resistor R69 and is simultaneously connected to pin 3 (DB7) of LED2 and LED3 and pin 2 (DB7) of LED1. Pins 20 and 21 of U2 are electrically connected to pins 8 (GRID8) and 9 (GRID7) of LED3, respectively. Pins 23 and 24 of U2 are electrically connected to pin 12 (GRID6) of LED3 and pin 8 (GRID5) of LED2, respectively. The display screen is composed of LED1, LED2 and LED3.

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