High-speed air duct control circuit

Abstract

The utility model discloses a high-speed air duct control circuit, which comprises a power supply module, a voltage conversion module, a main control module, an electric heating module, a first driving module, a second driving module and a third driving module, the main control module is connected with the voltage conversion module; the electric heating module is respectively connected with the power supply module and the main control module; the first driving module is connected with the voltage conversion module and the main control module and used for being connected with the U phase of the direct current motor. The second driving module is connected with the voltage conversion module and the main control module and used for being connected with the V phase of the direct current motor. The third driving module is connected with the voltage conversion module and the main control module and used for being connected with the W phase of the direct current motor. Through the circuit, the direct current motor can be applied to the air duct, the rotating speed of the air duct is increased through the high conversion efficiency of the direct current motor, meanwhile, the cost problem is also considered, and very good practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation ducts, and in particular to a high-speed ventilation duct control circuit. Background Technology

[0002] A hair dryer is a common small electrical appliance, mainly used for drying and styling hair. A hair dryer mainly consists of a heating element and a fan. The fan blows the heat generated by the heating element onto the hair, drying it quickly. However, existing hair dryers use AC motors for their fans. Because AC motors have low conversion efficiency, it's difficult to achieve a good balance between cost and high speed. Therefore, a high-speed hair dryer control circuit is urgently needed to solve these problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a high-speed wind tunnel control circuit.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a high-speed wind tunnel control circuit, including a power supply module, a voltage conversion module, a main control module, an electric heating module, a first drive module, a second drive module and a third drive module;

[0005] The power module is connected to an AC power source;

[0006] The voltage conversion module is connected to the power supply module;

[0007] The main control module is connected to the voltage conversion module;

[0008] The electric heating module is connected to both the power supply module and the main control module.

[0009] The first drive module is connected to the voltage conversion module and the main control module respectively, and is used to connect to the U phase of the DC motor;

[0010] The second drive module is connected to the voltage conversion module and the main control module respectively, and is used to connect to the V phase of the DC motor;

[0011] The third drive module is connected to the voltage conversion module and the main control module respectively, and is used to connect to the W phase of the DC motor.

[0012] As one of the preferred embodiments of this utility model, the electric heating module includes optocoupler U2, optocoupler U3, optocoupler U7, thyristor Q1-Q2, resistors R2-R4, resistor R6, resistor R8, resistor R20, resistor R24 ​​and heating wire R44-R47.

[0013] One end of the optocoupler U3 emitter is connected to one end of the AC power supply via resistor R8. The other end of the optocoupler U3 emitter is connected to the other end of the AC power supply, one end of heating wire R44, one end of heating wire R46, the output terminal of SCR Q1, and the output terminal of SCR Q2. The input terminal of SCR Q1 is connected to one end of the AC power supply and resistor R3. The control terminal of SCR Q1 is connected to the other end of resistor R3 and one end of the optocoupler U2 receiver. Heating wire R44 is connected to the other end of the optocoupler U2 receiver via heating wire R45. One end of the optocoupler U2 emitter is connected to the +5V power supply and one end of resistor R4. The other end of the optocoupler U2 emitter is connected to the other end of resistor R4 and one end of resistor R6.

[0014] The input terminals of the thyristor Q2 are connected to one end of the AC power supply and the resistor R2, respectively. The control terminals of the thyristor Q2 are connected to the other end of the resistor R2 and one end of the optocoupler U7 photodetector, respectively. The heating wire R46 is connected to the other end of the optocoupler U7 photodetector via the heating wire R47. One end of the optocoupler U7 photodetector is connected to the +5V power supply and one end of the resistor R20, respectively. The other end of the optocoupler U7 photodetector is connected to the other end of the resistor R20 and one end of the resistor R24, respectively. The other ends of the resistor R6 and the other ends of the resistor R24 ​​are connected to the main control module.

[0015] As a preferred embodiment of this utility model, the first driving module includes a driving chip U6, resistors R1, R7, and R9, and capacitors C1, C4, C7, C10, and C14. The VCC pin of the driving chip U6 is connected to a +15V power supply and one end of capacitor C1. The HIN pin of the driving chip U6 is connected to one end of resistor R1 and one end of capacitor C7. The LIN pin of the driving chip U6 is connected to one end of resistor R7 and one end of capacitor C4. The VB pin of the driving chip U6 is connected to one end of capacitor C14, the SW pin of the driving chip U6, and the U phase of the DC motor via capacitor C10. The P pin of the driving chip U6 is connected to a +155V power supply and the other end of capacitor C14. The VS pin of the driving chip U6 is connected to the PGND terminal via resistor R9. The GND pin of the driving chip U6, the other end of capacitor C7, the other end of capacitor C4, and the other end of capacitor C1 are connected to the AGND terminal.

[0016] In one preferred embodiment of this utility model, the second drive module includes a drive chip U4, resistors R10-R11, resistor R14, capacitors C2, C5, C8, C11, and C15. The VCC pin of the drive chip U4 is connected to a +15V power supply and one end of capacitor C2. The HIN pin of the drive chip U4 is connected to one end of resistor R10 and one end of capacitor C8. The LIN pin of the drive chip U4 is connected to one end of resistor R11 and one end of capacitor C5. The VB pin of the drive chip U4 is connected to one end of capacitor C15, the SW pin of the drive chip U4, and the V phase of the DC motor via capacitor C11. The P pin of the drive chip U4 is connected to a +155V power supply and the other end of capacitor C15. The VS pin of the drive chip U4 is connected to the PGND terminal via resistor R14. The GND pin of the drive chip U4, the other end of capacitor C8, the other end of capacitor C5, and the other end of capacitor C2 are connected to the AGND terminal.

[0017] In one preferred embodiment of this utility model, the third driving module includes a driving chip U1, resistors R5, R12-R13, R13A, capacitors C3, C6, C9, C12, and C13. The VCC pin of the driving chip U1 is connected to a +15V power supply and one end of capacitor C3. The HIN pin of the driving chip U1 is connected to one end of resistor R5 and one end of capacitor C9. The LIN pin of the driving chip U1 is connected to one end of resistor R12 and one end of capacitor C6. The VB pin of the driving chip U1... The pins are connected to one end of capacitor C13, the SW pin of driver chip U1, and the W phase of DC motor via capacitor C12. The P pin of driver chip U1 is connected to the +155V power supply and the other end of capacitor C13. The VS pin of driver chip U1 is connected to one end of resistor R13 and one end of resistor R13A. The other ends of resistor R13 and resistor R13A are connected to the PGND terminal. The GND pin of driver chip U1, the other end of capacitor C9, the other end of capacitor C6, and the other end of capacitor C3 are connected to the AGND terminal.

[0018] As one of the preferred embodiments of this utility model, a high-speed wind tunnel control circuit further includes a status indication module that is connected to the voltage conversion module and the main control module respectively.

[0019] As one of the preferred embodiments of this utility model, a high-speed wind tunnel control circuit further includes a temperature detection module connected to the voltage conversion module and the main control module respectively.

[0020] As one of the preferred embodiments of this utility model, a high-speed duct control circuit further includes a negative ion driving module connected to the voltage conversion module and the main control module respectively.

[0021] As one of the preferred embodiments of this utility model, a high-speed wind tunnel control circuit also includes a button module that is connected to the main control module.

[0022] The beneficial effects of this utility model are as follows: A high-speed ventilation duct control circuit includes a power supply module, a voltage conversion module, a main control module, an electric heating module, a first drive module, a second drive module, and a third drive module; the power supply module is connected to an AC power source; the voltage conversion module is connected to the power supply module; the main control module is connected to the voltage conversion module; the electric heating module is connected to both the power supply module and the main control module; the first drive module is connected to both the voltage conversion module and the main control module, and is used to connect to the U phase of a DC motor; the second drive module is connected to both the voltage conversion module and the main control module, and is used to connect to the V phase of a DC motor; the third drive module is connected to both the voltage conversion module and the main control module, and is used to connect to the W phase of a DC motor; through the above circuit, a DC motor can be applied to a ventilation duct, utilizing the high conversion efficiency of the DC motor to increase the speed of the ventilation duct, while also taking into account cost, making it highly practical. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of a high-speed ventilation duct control circuit.

[0025] Figure 2 This is the circuit schematic of the power module;

[0026] Figure 3 This is the circuit schematic of the voltage conversion module;

[0027] Figure 4 This is the circuit diagram of the electric heating module;

[0028] Figure 5 The circuit schematic of the main control module;

[0029] Figure 6 The circuit schematics are for the first drive module, the second drive module, and the third drive module.

[0030] Figure 7 This is the circuit schematic of the status indicator module;

[0031] Figure 8 This is the circuit schematic of the temperature detection module;

[0032] Figure 9 This is the circuit schematic of the negative ion driving module;

[0033] Figure 10 This is the circuit schematic of the button module. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0035] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 10 A high-speed air duct control circuit includes a power supply module 11, a voltage conversion module 12, a main control module 20, an electric heating module 30, a first drive module 41, a second drive module 42, and a third drive module 43.

[0039] Power module 11 is connected to an AC power source;

[0040] Voltage conversion module 12 is connected to power supply module 11;

[0041] The main control module 20 is connected to the voltage conversion module 12;

[0042] The electric heating module 30 is connected to the power supply module 11 and the main control module 20 respectively;

[0043] The first drive module 41 is connected to the voltage conversion module 12 and the main control module 20 respectively, and is used to connect to the U phase of the DC motor;

[0044] The second drive module 42 is connected to the voltage conversion module 12 and the main control module 20 respectively, and is used to connect to the V phase of the DC motor;

[0045] The third drive module 43 is connected to the voltage conversion module 12 and the main control module 20 respectively, and is used to connect to the W phase of the DC motor.

[0046] In this utility model, the power supply module 11 is connected to an AC power source and rectifies the AC power to convert it into DC power. Then, the voltage conversion module 12 provides the 155V voltage required for the DC motor to operate, as well as the 15V and 5V voltages required by various circuit modules. (Refer to...) Figure 10 In some embodiments, a high-speed duct control circuit further includes a button module 80 connected to the main control module 20. The main control module 20 can output a corresponding PWM signal according to the signal generated when the button module 80 is triggered, thereby controlling the first drive module 41, the second drive module 42, and the third drive module 43 to drive the three-phase DC motor. Specifically, the button module 80 includes a button K1 and a button K2. Button K1 is a mode button, and button K2 is a hot / cold button. The modes include: Mode 1: High temperature / strong wind with orange light on; Mode 2: Medium wind / low temperature with orange light on; Mode 3: Alternating hot and cold / medium temperature weak wind with orange / blue breathing light on for 5 seconds of cold air / 5 seconds of hot air; Mode 4: Weak wind / high temperature with orange light on; Mode 5: Weak wind / low temperature with orange light on; The mode sequence is: Mode 1 → Mode 2 → Mode 3 → Mode 4 → Mode 5 → Mode 1 → Mode 2...

[0047] In some embodiments, the DC motor has temperature rise protection. When the temperature is higher than 115°, the DC motor decelerates and the power is reduced to 50% of the original. When the temperature of the DC motor returns to below 80°, the DC motor slowly resumes normal speed operation.

[0048] Reference Figure 4In some embodiments, the electric heating module 30 includes optocouplers U2, U3, and U7, SCRs Q1-Q2, resistors R2-R4, R6, R8, R20, R24, and heating wires R44-R47. One end of the light emitter of optocoupler U3 is connected to one end of the AC power supply via resistor R8. The other end of the light emitter of optocoupler U3 is connected to the other end of the AC power supply, one end of heating wire R44, one end of heating wire R46, the output terminal of SCR Q1, and the output terminal of SCR Q2. The input terminal of SCR Q1 is connected to one end of the AC power supply and resistor R3. The control terminal of SCR Q1 is connected to the other end of resistor R3 and one end of the light receiver of optocoupler U2. Heating wire R44 is connected to the other end of the light receiver of optocoupler U2 via heating wire R45. One end of the light emitter of optocoupler U2 is connected to the +5V power supply and resistor R44. One end of R4 is connected to the LED, and the other end of the LED is connected to the other end of the resistor R4 and one end of the resistor R6. The input terminal of the thyristor Q2 is connected to one end of the AC power supply and the resistor R2. The control terminal of the thyristor Q2 is connected to the other end of the resistor R2 and one end of the LED receiver of the LED U7. The heating wire R46 is connected to the other end of the LED receiver of the LED U7 via the heating wire R47. One end of the LED of the LED U7 is connected to the +5V power supply and one end of the resistor R20. The other end of the LED of the LED U7 is connected to the other end of the resistor R20 and one end of the resistor R24. The other ends of the resistor R6 and the other end of the resistor R24 ​​are connected to the main control module 20. Specifically, the main control module 20 can control the working state of the heating wires R44-R47 by controlling the thyristors Q1 and Q2, thereby realizing the switching between high-temperature hot air, low-temperature hot air and cold air.

[0049] Reference Figure 5 In some embodiments, the first driving module 41 includes a driving chip U6, resistors R1, R7, and R9, and capacitors C1, C4, C7, C10, and C14. The VCC pin of the driving chip U6 is connected to a +15V power supply and one end of capacitor C1. The HIN pin of the driving chip U6 is connected to one end of resistor R1 and one end of capacitor C7. The LIN pin of the driving chip U6 is connected to one end of resistor R7 and one end of capacitor C4. The VB pin of the driving chip U6 is connected to one end of capacitor C14, the SW pin of the driving chip U6, and the U phase of the DC motor via capacitor C10. The P pin of the driving chip U6 is connected to a +155V power supply and the other end of capacitor C14. The VS pin of the driving chip U6 is connected to the PGND terminal via resistor R9. The GND pin of the driving chip U6, the other end of capacitor C7, the other end of capacitor C4, and the other end of capacitor C1 are connected to the AGND terminal.

[0050] Reference Figure 5In some embodiments, the second drive module 42 includes a drive chip U4, resistors R10-R11, resistor R14, capacitors C2, C5, C8, C11, and C15. The VCC pin of the drive chip U4 is connected to a +15V power supply and one end of capacitor C2. The HIN pin of the drive chip U4 is connected to one end of resistor R10 and one end of capacitor C8. The LIN pin of the drive chip U4 is connected to one end of resistor R11 and one end of capacitor C5. The VB pin of the drive chip U4 is connected to one end of capacitor C15, the SW pin of the drive chip U4, and the V phase of the DC motor via capacitor C11. The P pin of the drive chip U4 is connected to a +155V power supply and the other end of capacitor C15. The VS pin of the drive chip U4 is connected to the PGND terminal via resistor R14. The GND pin of the drive chip U4, the other end of capacitor C8, the other end of capacitor C5, and the other end of capacitor C2 are connected to the AGND terminal.

[0051] Reference Figure 5 In some embodiments, the third driving module 43 includes a driving chip U1, resistors R5, R12-R13, R13A, capacitors C3, C6, C9, C12, and C13. The VCC pin of the driving chip U1 is connected to a +15V power supply and one end of capacitor C3. The HIN pin of the driving chip U1 is connected to one end of resistor R5 and one end of capacitor C9. The LIN pin of the driving chip U1 is connected to one end of resistor R12 and one end of capacitor C6. The VB pin of the driving chip U1 is connected via... Capacitor C12 is connected to one end of capacitor C13, the SW pin of driver chip U1, and the W phase of the DC motor. The P pin of driver chip U1 is connected to the +155V power supply and the other end of capacitor C13. The VS pin of driver chip U1 is connected to one end of resistor R13 and one end of resistor R13A. The other ends of resistor R13 and resistor R13A are connected to the PGND terminal. The GND pin of driver chip U1, the other end of capacitor C9, the other end of capacitor C6, and the other end of capacitor C3 are connected to the AGND terminal.

[0052] Reference Figure 7 In some embodiments, a high-speed duct control circuit further includes a status indicator module 50 connected to the voltage conversion module 12 and the main control module 20 respectively. The status indicator module 50 can emit different colors of light to indicate different states of the duct, such as blue light and orange light, which can indicate different working modes.

[0053] Reference Figure 8 In some embodiments, a high-speed duct control circuit further includes a temperature detection module 60 connected to the voltage conversion module 12 and the main control module 20, respectively.

[0054] Reference Figure 9In some embodiments, a high-speed air duct control circuit further includes a negative ion driving module 70 connected to the voltage conversion module 12 and the main control module 20 respectively. The negative ion driving module 70 is connected to a negative ion emitter. After the air duct is turned on, the negative ion emitter is always in working state, with a negative ion concentration of more than 8 million / cm3.

[0055] The advantages of this invention are: the above circuit allows a DC motor to be applied to a fan duct, utilizing the high conversion efficiency of the DC motor to increase the speed of the fan duct, while also taking into account cost, making it highly practical.

[0056] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A high-speed ventilation duct control circuit, characterized in that: It includes a power supply module (11), a voltage conversion module (12), a main control module (20), an electric heating module (30), a first drive module (41), a second drive module (42), and a third drive module (43). The power module (11) is connected to an AC power source; The voltage conversion module (12) is connected to the power supply module (11); The main control module (20) is connected to the voltage conversion module (12); The electric heating module (30) is connected to the power supply module (11) and the main control module (20) respectively; The first drive module (41) is connected to the voltage conversion module (12) and the main control module (20) respectively, and is used to connect to the U phase of the DC motor; The second drive module (42) is connected to the voltage conversion module (12) and the main control module (20) respectively, and is used to connect to the V phase of the DC motor; The third drive module (43) is connected to the voltage conversion module (12) and the main control module (20) respectively, and is used to connect the W phase of the DC motor.

2. The high-speed air duct control circuit according to claim 1, characterized in that: The electric heating module (30) includes optocoupler U2, optocoupler U3, optocoupler U7, thyristor Q1-Q2, resistor R2-R4, resistor R6, resistor R8, resistor R20, resistor R24 ​​and heating wire R44-R47. One end of the optocoupler U3 emitter is connected to one end of the AC power supply via resistor R8. The other end of the optocoupler U3 emitter is connected to the other end of the AC power supply, one end of heating wire R44, one end of heating wire R46, the output terminal of SCR Q1, and the output terminal of SCR Q2. The input terminal of SCR Q1 is connected to one end of the AC power supply and resistor R3. The control terminal of SCR Q1 is connected to the other end of resistor R3 and one end of the optocoupler U2 receiver. Heating wire R44 is connected to the other end of the optocoupler U2 receiver via heating wire R45. One end of the optocoupler U2 emitter is connected to the +5V power supply and one end of resistor R4. The other end of the optocoupler U2 emitter is connected to the other end of resistor R4 and one end of resistor R6. The input terminal of the thyristor Q2 is connected to one end of the AC power supply and the resistor R2 respectively. The control terminal of the thyristor Q2 is connected to the other end of the resistor R2 and one end of the photodetector of the optocoupler U7 respectively. The heating wire R46 is connected to the other end of the photodetector of the optocoupler U7 via the heating wire R47. One end of the light emitter of the optocoupler U7 is connected to the +5V power supply and one end of the resistor R20 respectively. The other end of the light emitter of the optocoupler U7 is connected to the other end of the resistor R20 and one end of the resistor R24 ​​respectively. The other end of the resistor R6 and the other end of the resistor R24 ​​are connected to the main control module (20).

3. The high-speed air duct control circuit according to claim 1, characterized in that: The first driving module (41) includes a driving chip U6, resistors R1, R7, and R9, capacitors C1, C4, C7, C10, and C14. The VCC pin of the driving chip U6 is connected to a +15V power supply and one end of capacitor C1. The HIN pin of the driving chip U6 is connected to one end of resistor R1 and one end of capacitor C7. The LIN pin of the driving chip U6 is connected to one end of resistor R7 and one end of capacitor C4. The VB pin of the driving chip U6 is connected to one end of capacitor C14, the SW pin of the driving chip U6, and the U phase of the DC motor via capacitor C10. The P pin of the driving chip U6 is connected to a +155V power supply and the other end of capacitor C14. The VS pin of the driving chip U6 is connected to the PGND terminal via resistor R9. The GND pin of the driving chip U6, the other end of capacitor C7, the other end of capacitor C4, and the other end of capacitor C1 are connected to the AGND terminal.

4. The high-speed air duct control circuit according to claim 1, characterized in that: The second drive module (42) includes a drive chip U4, resistors R10-R11, resistor R14, capacitors C2, C5, C8, C11, and C15. The VCC pin of the drive chip U4 is connected to the +15V power supply and one end of capacitor C2. The HIN pin of the drive chip U4 is connected to one end of resistor R10 and one end of capacitor C8. The LIN pin of the drive chip U4 is connected to one end of resistor R11 and one end of capacitor C5. The VB pin of the drive chip U4 is connected to one end of capacitor C15, the SW pin of the drive chip U4, and the V phase of the DC motor via capacitor C11. The P pin of the drive chip U4 is connected to the +155V power supply and the other end of capacitor C15. The VS pin of the drive chip U4 is connected to the PGND terminal via resistor R14. The GND pin of the drive chip U4, the other end of capacitor C8, the other end of capacitor C5, and the other end of capacitor C2 are connected to the AGND terminal.

5. The high-speed air duct control circuit according to claim 1, characterized in that: The third driving module (43) includes a driving chip U1, resistors R5, R12-R13, R13A, capacitors C3, C6, C9, C12, and C13. The VCC pin of the driving chip U1 is connected to a +15V power supply and one end of capacitor C3. The HIN pin of the driving chip U1 is connected to one end of resistor R5 and one end of capacitor C9. The LIN pin of the driving chip U1 is connected to one end of resistor R12 and one end of capacitor C6. The VB pin of the driving chip U1 is connected to capacitor C13. 12 is connected to one end of capacitor C13, the SW pin of driver chip U1, and the W phase of DC motor respectively. The P pin of driver chip U1 is connected to the +155V power supply and the other end of capacitor C13 respectively. The VS pin of driver chip U1 is connected to one end of resistor R13 and one end of resistor R13A. The other ends of resistor R13 and resistor R13A are connected to the PGND terminal. The GND pin of driver chip U1, the other end of capacitor C9, the other end of capacitor C6, and the other end of capacitor C3 are connected to the AGND terminal.

6. The high-speed air duct control circuit according to claim 1, characterized in that: It also includes a status indication module (50) that is connected to the voltage conversion module (12) and the main control module (20) respectively.

7. The high-speed air duct control circuit according to claim 1, characterized in that: It also includes a temperature detection module (60) that is connected to the voltage conversion module (12) and the main control module (20) respectively.

8. The high-speed air duct control circuit according to claim 1, characterized in that: It also includes a negative ion drive module (70) that is connected to the voltage conversion module (12) and the main control module (20) respectively.

9. A high-speed air duct control circuit according to claim 1, characterized in that: It also includes button modules (80) that are connected to the main control module (20).

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