Plasma hand dryer

Abstract

The plasma hand dryer comprises a shell, an air inlet is formed in the lower side of the shell, the shell is provided with a plasma bin and an air inlet bin which are communicated with the air inlet, and one end of the air inlet bin is connected with a first positioning plate and a second positioning plate which are clamped with each other; a first sealing plate and a second sealing plate are jointly arranged at one end of the first positioning plate and one end of the second positioning plate, an air outlet is formed in one end of the first sealing plate and one end of the second sealing plate, a plasma generator is installed in the plasma bin, one side of the plasma bin is communicated with the outside, a circuit board is installed in the air inlet bin, and the other side of the plasma bin is communicated with the air outlet. And an aluminum row radiator is mounted on the circuit board. The invention has the advantage of heat reduction integration.

Description

Technical Field

[0001] The invention relates to the field of hand dryers, in particular to a plasma hand dryer. Background Art

[0002] At present, when the hand dryer is working, a lot of heat is generated inside, and there is a risk of damage if it works for a long time. Summary of the invention

[0003] The object of the present invention is to provide a plasma hand dryer to solve the problems raised in the above background technology, which has the advantage of reducing the heat of the hand dryer.

[0004] To achieve the above-mentioned objectives, the invention provides the following technical solutions: a plasma hand dryer, comprising a shell, an air inlet is arranged on the lower side of the shell, the shell is provided with a plasma chamber and an air inlet chamber connected to the air inlet, one end of the air inlet chamber is connected with a first positioning plate and a second positioning plate which are mutually clamped, one end of the first positioning plate and the second positioning plate are jointly provided with a first sealing plate and a second sealing plate, one end of the first sealing plate and the second sealing plate are provided with an air outlet, a plasma generator is installed in the plasma chamber, one side of the plasma chamber is connected to the outside, a circuit board is installed in the air inlet chamber, and an aluminum row radiator is installed on the circuit board.

[0005] By adopting the above technical solution, the main working principle of the plasma generator is: to increase the low voltage to high voltage and negative high voltage through the boost circuit, and use the positive high voltage and negative high voltage to ionize the air (mainly oxygen) to produce a large number of positive ions and negative ions, and the number of negative ions is about 1.5 times the number of positive ions. The positive ions and negative ions generated by the plasma generator at the same time will produce a huge energy release in the moment of positive and negative neutralization in the air, thereby causing the bacteria to die and achieve the effect of sterilization. Since the number of negative ions is greater than the number of positive ions, the excess negative ions still float in the air, which can eliminate smoke, dust, and odor, improve the quality of the air, and promote the health care of human health;

[0006] It is worth noting that in the independent air intake structure system, when the air purified by plasma passes through the air intake channel, the heat is taken away by the aluminum radiator on the circuit board, while reducing the power consumption of the heater, thus saving electricity and reducing power consumption to a certain extent.

[0007] As a further solution of the present invention: the shell includes an upper shell and a lower shell, the lower shell is integrally connected with a first positioning plate, the first positioning plate is circumferentially provided with a first inwardly recessed card groove, the first positioning plate is connected to the second positioning plate through the first card groove, the second positioning plate is integrally connected with a matching first convex strip on the side facing the first card groove, the first positioning plate is integrally connected with a card block on the side facing the second positioning plate, the second positioning plate is provided with a second card groove that cooperates with the card block, a hair dryer is installed in the upper shell, the upper shell is integrally connected with a first placement plate at both ends of the hair dryer, and the second positioning plate is integrally connected with a second placement plate that cooperates with the first placement plate.

[0008] By adopting the above technical solution, the second positioning plate is moved toward the first positioning plate until the two are engaged. The engaging process is that the first convex strip on the second positioning plate is engaged into the first slot, and the block is engaged into the second slot at the same time, thereby achieving the engagement of the two. The hair dryer blows toward the air outlet, and negative pressure is formed at the leeward side of the hair dryer to form a circulation. The first placement plate and the second placement plate cooperate to increase the stability of the hair dryer when it is between the first positioning plate and the second positioning plate.

[0009] Preferably, the lower shell is integrally connected with an air inlet bin on one side of the first sealing plate, a first air inlet hole is provided on one side of the air inlet bin, and a second air inlet hole is provided on the side of the first positioning plate.

[0010] Preferably, an air inlet and an air outlet are provided below the shell, and a plurality of the air outlets are provided.

[0011] As a further solution of the invention: a third inwardly recessed groove is arranged in the circumference of the first sealing plate, and a second convex strip matching the third groove is integrally connected to one side of the second sealing plate facing the third groove.

[0012] By adopting the above technical solution, the second sealing plate and the first sealing plate are clamped together through the third clamping groove and the second convex strip, and the first sealing plate and the second sealing plate are arranged below the first positioning plate and the second positioning plate.

[0013] As a further solution of the present invention: a support rod is provided on one side of the second sealing plate, and a support plate clamped with the support rod is integrally connected to the side surface of the second sealing plate.

[0014] By adopting the above technical solution, the first sealing plate is connected to the support rod through the support plate, thereby increasing the stability of the first sealing plate.

[0015] As a further solution of the present invention: an extension plate located at a connection point between the first sealing plate and the second sealing plate is integrally connected to the inner side surface of the first sealing plate.

[0016] By adopting the above technical solution, the provision of the extension plate can increase the contact area between the first sealing plate and the second sealing plate, thereby improving the sealing performance.

[0017] It includes a sensing board, a control board and a connecting main board, wherein the sensing board is connected to the control board through wires, and the control board is connected to the connecting main board through wires.

[0018] The control board includes a first MCU, a touch key module and a touch key processing module capable of processing input touch signals, driving corresponding indicator lights to light up and outputting to the first MCU.

[0019] The touch button module includes four touch buttons.

[0020] By adopting the above technical solution, the sensing plate is used to sense whether there is a hand under the hand dryer. After sensing the presence of a hand, the sensing plate transmits a signal to the control board, and the control board then controls the start of the connection main board. In this process, the touch signal can be input through the touch button module and then processed by the touch button processing module. The processed touch signal is then sent to the first MCU for subsequent processing, and then transmitted to the connection main board for subsequent processing. The connection main board is used to start or shut down the hand dryer, and the touch button processing is used to process the input touch signal, drive the corresponding indicator light to light up and output it to the first MCU.

[0021] As a further solution of the present invention: the induction board is provided with an infrared receiving photoelectric triode, an infrared emitting diode, a blue-green two-color light emitting diode and a potentiometer.

[0022] By adopting the above technical solution, the infrared emitting diode emits a 20Hz pulse infrared light. When encountering an external obstruction in front, the infrared light is reflected back and received by the infrared photoelectric transistor, which converts the optical signal into an electrical signal and amplifies it before transmitting it to the MCU through the interface line. The potentiometer on the board can set the intensity of the electrical signal converted from the received light. The MCU calculates the distance of the obstruction, that is, the sensing distance, according to the size of the signal. If the sensing distance is small, the green LED will be lit regularly, otherwise the blue LED will be lit.

[0023] As a further solution of the present invention: the control panel also includes an interface, an LCD display and an LED indication.

[0024] By adopting the above technical solution, the interface is used to receive external transmission signals and power supply, the LCD screen is used to display the hand drying animation, the touch button is used to input the touch control signal, and the LED indicator light is used to display the power switch, heating switch, high and low gears, and plasma working status.

[0025] Preferably, the connecting mainboard is a brushed mainboard or a brushless mainboard;

[0026] The brushed main board includes a first power supply, a first control board interface, a first induction board interface, a second MCU, a first plasma generator fan drive and a first motor heating drive.

[0027] Preferably, the brushless mainboard includes a second power supply, a motor drive, a third MCU, a second sensor board interface, a second control board interface, a heater, and a negative ion generator fan drive.

[0028] Compared with the prior art, the invention has the following beneficial effects:

[0029] 1. The main working principle of the plasma generator is to increase the low voltage to high voltage and negative high voltage through the booster circuit, and use the positive and negative high voltage to ionize the air (mainly oxygen) to produce a large number of positive ions and negative ions. The number of negative ions is about 1.5 times the number of positive ions. The positive ions and negative ions generated by the plasma generator at the same time will produce a huge energy release in the moment of positive and negative neutralization in the air, thereby causing the bacteria to die and achieve the effect of sterilization. Since the number of negative ions is greater than the number of positive ions, the excess negative ions still float in the air, which can eliminate smoke, dust, and odor, improve the quality of the air, and promote the health care of human health;

[0030] It is worth noting that in the independent air intake structure system, when the air purified by plasma passes through the air intake channel, it takes away the heat through the aluminum radiator on the circuit board, while reducing the power consumption of the heater, which plays a certain role in saving electricity and reducing power consumption;

[0031] 2. Move the second positioning plate toward the first positioning plate until the two are connected. The connection process is that the first convex strip on the second positioning plate is connected to the first card slot, and the card block is connected to the second card slot to achieve the connection between the two. The hair dryer blows toward the air outlet, and negative pressure is formed at the leeward side of the hair dryer to form a cycle. The first placement plate and the second placement plate cooperate to increase the stability of the hair dryer when it is between the first positioning plate and the second positioning plate.

[0032] 3. The sensing board is used to sense whether there is a hand under the hand dryer. After sensing the presence of a hand, the sensing board transmits a signal to the control board, and the control board then controls the start of the connection main board. In this process, the touch signal can be input through the touch button module and then processed by the touch button processing module. The processed touch signal is then sent to the first MCU for subsequent processing, and then transmitted to the connection main board for subsequent processing. The connection main board is used to start or turn off the hand dryer, and the touch button processing is used to process the input touch signal, drive the corresponding indicator light to light up and output it to the first MCU. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a structural schematic diagram of an embodiment;

[0034] Figure 2 This is a schematic diagram of the structure of the embodiment after removing the upper shell;

[0035] Figure 3 for Figure 2 A schematic diagram of the structure without the second positioning plate;

[0036] Figure 4 is a structural schematic diagram of a second positioning plate;

[0037] Figure 5 for Figure 3 A schematic diagram of the structure with the second sealing plate removed;

[0038] Figure 6 is a schematic structural diagram of the second sealing plate in the embodiment;

[0039] Figure 7 This is a schematic diagram of the structure of the embodiment after removing the upper shell;

[0040] Figure 8 It is a schematic diagram of the structure of the embodiment after a part of the plasma chamber is removed;

[0041] Fig. 9 for Figure 8 Schematic diagram of the structure after removing the lower shell;

[0042] Fig.10 for Figure 7 A schematic diagram of the structure from another perspective;

[0043] Fig.11 for Fig.10 Schematic diagram of the structure after removing the second positioning plate;

[0044] Fig.12 is a schematic structural diagram of a second positioning plate in the embodiment;

[0045] Fig.13 It is a structural schematic diagram of the display screen in the embodiment;

[0046] Fig.14 A schematic diagram of the structure of a brushed motherboard selected for connection to the motherboard;

[0047] Fig.15 A schematic diagram of the structure of a brushless motherboard selected for connection to the motherboard;

[0048] Fig.16 is a schematic diagram of the induction plate in the embodiment;

[0049] Fig.17 This is the schematic diagram of the control board;

[0050] Fig.18 This is the schematic diagram of the brushed motherboard;

[0051] Fig.19 This is the schematic diagram of the brushless mainboard.

[0052] In the figure: 1, lower shell; 2, upper shell; 3, first positioning plate; 4, first slot; 5, second positioning plate; 6, first convex strip; 7, block; 8, second slot; 9, hair dryer; 10, first placement plate; 11, second placement plate; 12, air inlet; 13, air outlet; 14, first sealing plate; 15, third slot; 16, second sealing plate; 17, second convex strip; 18, support rod; 19, support plate; 20, extension plate; 21, air inlet compartment; 22, first air inlet hole; 23, annular groove; 24, ring plate; 25, plasma generator; 26, circuit board; 27, aluminum row radiator; 28, plasma compartment; 29, mounting groove; 30, second air inlet. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the invention, not all of them. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0054] In the embodiment of the invention,

[0055] A plasma hand dryer, such as Figure 1-Figure 19 As shown, it includes a shell, an air inlet 12 is provided on the lower side of the shell, and the shell is provided with a plasma chamber 28 and an air inlet chamber 21 connected to the air inlet 12, one end of the air inlet chamber 21 is connected with a first positioning plate 3 and a second positioning plate 5 that are mutually clamped, one end of the first positioning plate 3 and the second positioning plate 5 are jointly provided with a first sealing plate 14 and a second sealing plate 16, one end of the first sealing plate 14 and the second sealing plate 16 is provided with an air outlet 13, a plasma generator 25 is installed in the plasma chamber 28, one side of the plasma chamber 28 is connected to the outside, a circuit board 26 is installed in the air inlet chamber 21, and an aluminum row radiator 27 is installed on the circuit board 26. One end of the plasma chamber 28 is provided with a mounting groove 29, and a fan (not shown) is installed in the mounting groove 29.

[0056] The shell includes an upper shell 2 and a lower shell 1, the lower shell 1 is integrally connected with a first positioning plate 3, the first positioning plate 3 is circumferentially provided with a first inwardly recessed slot 4, the first positioning plate 3 is connected with a second positioning plate 5 through the first slot 4, the second positioning plate 5 is integrally connected with a matching first ridge 6 on the side facing the first slot 4, the first positioning plate 3 is integrally connected with a block 7 on the side facing the second positioning plate 5, the second positioning plate 5 is provided with a second slot 8 that cooperates with the block 7, a hair dryer 9 is installed in the upper shell 2, the upper shell 2 is integrally connected with a first placement plate 10 at both ends of the hair dryer 9, the second positioning plate 5 is integrally connected with a second placement plate 11 that cooperates with the first placement plate 10.

[0057] The lower shell 1 is integrally connected with an air inlet bin 21 on one side of the first sealing plate 14 , a first air inlet hole 22 is provided on one side of the air inlet bin 21 , and a second air inlet hole 30 is provided on the side of the first positioning plate 3 .

[0058] An air inlet 12 and an air outlet 13 are disposed below the housing, and a plurality of air outlets 13 are disposed.

[0059] An annular groove 23 is provided on the side of the second sealing plate 16 , and a ring plate 24 inserted into the annular groove 23 is integrally connected to the side of the second positioning plate 5 facing the second sealing plate 16 .

[0060] The first sealing plate 14 is provided with a third inwardly recessed groove 15 in its circumference, and the second sealing plate 16 is integrally connected with a second protruding strip 17 that fits with the third groove 15 on one side facing the third groove 15 .

[0061] A support rod 18 is disposed on one side of the second sealing plate 16 , and a support plate 19 that is clamped with the support rod 18 is integrally connected to the side surface of the second sealing plate 16 .

[0062] An extension plate 20 located at the connection between the first sealing plate 14 and the second sealing plate 16 is integrally connected to the inner side surface of the first sealing plate 14 .

[0063] It includes a sensing board, a control board and a connecting main board, wherein the sensing board is connected to the control board through wires, and the control board is connected to the connecting main board through wires.

[0064] The control board includes a first MCU, a touch key module and a touch key processing module capable of processing input touch signals and driving corresponding indicator lights to light up and outputting to the first MCU.

[0065] The touch button module includes four touch buttons.

[0066] The induction board is provided with an infrared receiving photoelectric triode, an infrared emitting diode, a blue-green two-color light emitting diode and a potentiometer.

[0067] The control panel also includes an interface, an LCD display and an LED indication.

[0068] The connecting mainboard is a brushed mainboard or a brushless mainboard;

[0069] The brushed main board includes a first power supply, a first control board interface, a first induction board interface, a second MCU, a first plasma generator fan drive and a first motor heating drive.

[0070] The brushless mainboard includes a second power supply, a motor driver, a third MCU, a second induction board interface, a second control board interface, a heater, and a negative ion generator fan driver.

[0071] The control panel is also provided with an interface for receiving external transmission signals and power supply;

[0072] The 1st and 6th pins of the interface input 5V positive and negative power supply, and the 2nd pin communicates with the motherboard status at TTL level.

[0073] Pin 3 is connected to the output heater switch signal, pin 4 is connected to the plasma working switch signal, and pin 5 sets the motor speed high and low level output.

[0074] The first MCU processes the signal logic to drive the LCD display, receives the touch signal, and outputs the control signal to the main board to realize the power on / off and function indication. The LCD display can display the hand drying animation.

[0075] LCD display: Display hand drying animation. The LCD screen displays the hand drying animation. The S1-S5 pins of the LCD display are divided by two external resistors R17-R30 and matched with the MCU's GPIO pin level inversion to load the AC voltage display pattern. R24, Q1, and R31 drive the LCD screen's backlight to light up and turn off.

[0076] Pin 1 of the first MCU is connected to LCD_COM, and pins 2, 3, 18, 19, and 20 are connected to S1-S5 of the LCD.

[0077] Pin 4 is connected to the power on / off LED indicator, pin 13 inputs the touch power on / off information, pin 16 outputs the LCD backlight control signal, and pin 17 is the status signal line for communicating with the motherboard.

[0078] Touch button: Input touch control signal.

[0079] The four touch buttons TK1-K4 input touch signals to the 9, 10, 11, and 13 pins of the processing chip PMS164.

[0080] TK1 is the power switch for the whole machine. Touch it for 1 second to turn it on, and touch it for 3 seconds to turn it off.

[0081] TK2 is the heater switch switching function.

[0082] TK3 is the high and low gear setting for the motor speed.

[0083] TK4 is the switch of the plasma generator.

[0084] LED indicator light: indicates power switch, heating switch, high and low gear, plasma working status.

[0085] LED1 lights up green when powered on and goes out when powered on.

[0086] LED2 is red and green, it lights up red when the heater is on and lights up green when the heater is off

[0087] LED3 is blue and green, it lights up green at high speed and blue at low speed.

[0088] LED4 lights up green when plasma is working and goes out when negative ions are turned off.

[0089] Touch button processing: Process the input touch signal, drive the corresponding indicator light and output it to the first MCU:

[0090] Pin 1 outputs the speed (SPEED) setting level, high speed is low level, low speed is high level.

[0091] Pin 2 outputs the power on / off level, high level for power on and low level for power off.

[0092] Pin 3 plasma working switch signal, high level works, low level shuts down.

[0093] Pin 4 drives the plasma working status LED indicator light, low level when plasma is working and high level when it is turned off.

[0094] Pins 7 and 8 are high and low range LED indicators. High range: pin 7 is low level and pin 8 is high level. Low range: pin 7 is high level and pin 8 is low level.

[0095] 9-pin heater switch touch signal input.

[0096] 10-pin power switch touch signal input.

[0097] 11 feet isotropic switch touch signal input.

[0098] Pin 13 sets the touch signal input for high and low settings.

[0099] Pin 14 is the heating switch signal output. A high level turns on the heating, and a low level turns off the heating.

[0100] 15, 16 feet heater switch indication, when heating is on, 15 feet is low and 16 feet is high, when heating is off, 15 feet is high and 16 feet is low.

[0101] The brushed main board includes a first power supply, a first control board interface, a first induction board interface, a second MCU, a first plasma generator fan drive and a first motor heating drive.

[0102] First power supply: AC 220V electricity is connected to the mainboard through J3, J4, and passes through F1 fuse to prevent short circuit fuse from blowing in the next stage. It is filtered out by L1, C7, C2 to form a common mode filter to remove common mode interference on the line and then input to T1 transformer, turning AC220V voltage into AC12V. AC12V is rectified by a full bridge composed of four diodes D1-D4, and then filtered by D5 and C3, C4 to become DC12V to supply power to the next stage. DC12V is input into 78M05, and the output DC5V is filtered by C5, C6 to supply power to the next stage.

[0103] R8, R9, R1, R12, and Q1 form an AC220V50Hz zero-crossing detection circuit, which is output to the external interrupt port of the MCU.

[0104] The first control board interface, pins 1 and 6 input 5V positive and negative power supply, pin 2 communicates with the mainboard status at TTL level, pin 3 inputs the heater switch signal, pin 4 inputs the plasma working switch signal, and pin 5 sets the motor speed high and low level input.

[0105] Second MCU: 1-pin infrared receiving signal input. 2, 6-pin sensor board LED lighting control. 3-pin is temperature acquisition signal input, 4-pin infrared transmission signal output, 5-pin voltage supply 5V, 7-pin speed setting information input, 8-pin plasma working switch signal input, 9-pin motor drive output, 10-pin heater switch drive output, 11-pin AC zero-crossing signal input, 12-pin power ground, 13-pin heater switch signal input, 14-pin plasma generator switch drive output, 15-pin fan switch drive output, 16-pin working status signal.

[0106] The first sensor board interface: 1, 6 pins power input, 2 pin connected to R19, Q6, R18, the MCU infrared emission pulse signal output to the infrared emission tube on the sensor board for transmission, 3, 4 pins MCU control the LED on the sensor board, 5 pins input the infrared sensing signal on the sensor to the second MCU through C9, R20, R22, Q7.

[0107] First plasma generator fan drive: The second MCU sends a drive signal through R6, Q3, U4, R5, R4, R3 to drive T2 to switch the plasma generator. The drive signal sent by the MCU drives Q4 through R7 to switch the fan.

[0108] The first motor heater drive: The drive signal sent by the second MCU drives T3 through R17, Q5, R16, U3, R15, and R14 to realize the switching of the motor. The drive signal sent by the MCU drives JD2 through R2, Q2, and D6 to realize the switching of the heater.

[0109] The brushless mainboard includes a second power supply, a motor driver, a third MCU, a second induction board interface, a second control board interface, a heater, and a negative ion generator fan driver.

[0110] Second power supply: AC 220V is connected to the mainboard through J1, J4, and passes through F1 fuse to prevent short circuit fuse from blowing. It is filtered by C1 to remove common mode interference on the line and input to D1 for rectification through R59NTC surge protection. The AC220V voltage is rectified by full bridge and filtered by CC14 to DC310V, which is input to PN8054E and external circuit to output DC15V for power supply to the next stage. DC15V is input to 78M05 and outputs DC5V, which is filtered by C23, C22 and then used for power supply to the next stage.

[0111] Second control board interface:

[0112] 1. Input 5V power supply positive and negative at pin 6.

[0113] Pin 2 communicates with the mainboard status at TTL level.

[0114] Pin 3 inputs the heater switch signal.

[0115] 4-pin plasma working switch signal,

[0116] Pin 5 sets the motor speed high and low level input

[0117] Second sensor board interface:

[0118] 1, 6-pin power input

[0119] The 2nd pin is connected to R34, Q5, and R35, which outputs the infrared emission pulse signal of the third MCU to the infrared emission tube on the sensor board.

[0120] The third MCU on pins 3 and 4 controls the on and off of the LED on the sensor board.

[0121] The infrared sensing signal on the sensor at pin 5 is input to the third MCU through C20, R37, R38, and 67.

[0122] Plasma Generator Fan Drive:

[0123] The driving signal sent by the third MCU drives T1 through R23, Q2, U6, R18, R21, and R15 to realize the switching of the plasma generator.

[0124] The driving signal sent by the third MCU drives Q3 through R24 and R22 to turn the fan on and off.

[0125] Heater drive:

[0126] The driving signal sent by the third MCU drives JD1 through R9, Q4, and D2 to turn the heater on and off.

[0127] Third MCU:

[0128] 1-pin plasma working switch signal input

[0129] 2-pin motor drive output,

[0130] 3-pin motor driver IC Rest

[0131] 4-pin motor driver IC RD

[0132] 5-pin voltage supply 5V

[0133] 6-pin infrared transmitter signal output

[0134] 7-pin heater switch drive output speed setting information input

[0135] 8, 13 sensor board LED lighting and extinguishing control.

[0136] 9 Plasma generator switch drive output

[0137] 10-pin fan switch drive output

[0138] Pin 11 infrared receiving signal input. AC zero crossing signal input

[0139] 12-pin power ground

[0140] Pin 14 is the temperature acquisition signal input

[0141] Pin 15 working status signal

[0142] 16-pin heater switch signal input

[0143] Motor drive:

[0144] The U2 module and the resistors and capacitors on the same side constitute the power drive of the BLDC motor. The six-channel PWM drive signals output by the MCU are input to the module through R2-R7 and C4-C9. C10, C11, C13, C27, C35 and C36 form a voltage doubling boost voltage for internal use in the module. R12 and R13 sample the drive current and provide protection when overcurrent occurs.

[0145] J8 is the motor Hall interface. Three Hall signals are input to BTA103 through R28-R33, C31-C33 to provide real-time position information of the motor.

[0146] BTA103 outputs 6 PWM drive signals corresponding to the three Hall signals to the drive module, and takes overcurrent protection according to the input current sampling value. The input speed pin voltage adjusts the output PWM pulse width to drive the motor to run at the set speed.

[0147] Working principle:

[0148] The main working principle of the plasma generator 25 is to increase the low voltage to high voltage and negative high voltage through the boost circuit, and use the positive high voltage and negative high voltage to ionize the air (mainly oxygen) to produce a large number of positive ions and negative ions, and the number of negative ions is about 1.5 times the number of positive ions. The positive ions and negative ions generated by the plasma generator 25 at the same time will produce a huge energy release in the moment of positive and negative neutralization in the air, thereby causing the bacteria to die and achieve the effect of sterilization. Since the number of negative ions is greater than the number of positive ions, the excess negative ions still float in the air, which can eliminate smoke, dust, and odor, improve the quality of the air, and promote the health care of human health;

[0149] It is worth noting that in the independent air intake structure system, when the air purified by plasma passes through the air intake channel, the heat is taken away by the aluminum row heat sink 27 on the circuit board 26, while reducing the power consumption of the heater, thus saving electricity and reducing power consumption to a certain extent.

[0150] Move the second positioning plate 5 toward the first positioning plate 3 until the two are engaged. The engaging process is that the first convex strip 6 on the second positioning plate 5 is engaged into the first slot 4, and the block 7 is engaged into the second slot 8 at the same time, thereby achieving the engagement of the two. The hair dryer 9 blows toward the air outlet 13, and negative pressure is formed at the leeward side of the hair dryer 9 to form a circulation. The first placement plate 10 and the second placement plate 11 cooperate to increase the stability of the hair dryer 9 when it is between the first positioning plate 3 and the second positioning plate 5.

[0151] The above description is only a preferred specific implementation manner of the invention, but the protection scope of the invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the invention according to the technical scheme and inventive concept of the invention, which should be covered by the protection scope of the invention.

Claims

1. A plasma hand dryer, comprising a housing, characterized in that: An air inlet (12) is arranged at the lower side of the shell, and the shell is provided with a plasma chamber (28) and an air inlet chamber (21) which are connected to the air inlet (12); one end of the air inlet chamber (21) is connected with a first positioning plate (3) and a second positioning plate (5) which are mutually clamped; one end of the first positioning plate (3) and the second positioning plate (5) are jointly provided with a first sealing plate (14) and a second sealing plate (16); one end of the first sealing plate (14) and the second sealing plate (16) are provided with an air outlet (13); a plasma generator (25) is installed in the plasma chamber (28); one side of the plasma chamber (28) is connected to the outside; a circuit board (26) is installed in the air inlet chamber (21); and an aluminum row radiator (27) is installed on the circuit board (26).

2. The plasma hand dryer according to claim 1, characterized in that: The shell comprises an upper shell (2) and a lower shell (1); the lower shell (1) is integrally connected with a first positioning plate (3); a first inwardly recessed first card groove (4) is arranged on the circumference of the first positioning plate (3); the first positioning plate (3) is connected with a second positioning plate (5) via the first card groove (4); a matching first convex strip (6) is integrally connected to the side of the second positioning plate (5) facing the first card groove (4); a card block (7) is integrally connected to the side of the first positioning plate (3) facing the second positioning plate (5); the second positioning plate (5) is provided with a second card groove (8) matched with the card block (7); a hair dryer (9) is installed in the upper shell (2); a first placement plate (10) located at both ends of the hair dryer (9) is integrally connected in the upper shell (2); and the second positioning plate (5) is integrally connected with a second placement plate (11) matched with the first placement plate (10).

3. The plasma hand dryer according to claim 2, characterized in that: The lower shell (1) is integrally connected to an air inlet bin (21) on one side of the first sealing plate (14), a first air inlet hole (22) is provided on one side of the air inlet bin (21), and a second air inlet hole (30) is provided on the side of the first positioning plate (3).

4. The plasma hand dryer according to claim 1, characterized in that: An air inlet (12) and an air outlet (13) are provided below the shell, and a plurality of the air outlets (13) are provided.

5. The plasma hand dryer according to claim 1, characterized in that: The first sealing plate (14) is provided with an inwardly recessed third groove (15) in the circumferential direction, and the second sealing plate (16) is integrally connected with a second convex strip (17) that fits with the third groove (15) on one side facing the third groove (15).

6. The plasma hand dryer according to claim 5, characterized in that: A support rod (18) is provided on one side of the second sealing plate (16), and a support plate (19) which is clamped with the support rod (18) is integrally connected to the side surface of the second sealing plate (16).

7. The plasma hand dryer according to claim 6, characterized in that: An extension plate (20) located at the connection between the first sealing plate (14) and the second sealing plate (16) is integrally connected to the inner side surface of the first sealing plate (14).

8. The plasma hand dryer according to claim 1, characterized in that: It includes a sensing board, a control board and a connecting main board, wherein the sensing board is connected to the control board through wires, and the control board is connected to the connecting main board through wires. The control board includes a first MCU, a touch key module and a touch key processing module capable of processing input touch signals, driving corresponding indicator lights to light up, and outputting to the first MCU, wherein the touch key module includes four touch keys.

9. The plasma hand dryer according to claim 8, characterized in that: The induction board is provided with an infrared receiving photoelectric transistor, an infrared emitting diode, a blue-green two-color light emitting diode and a potentiometer. The control board also includes an interface, an LCD display and an LED indication. The connection main board is a brushed main board or a brushless main board. The brushed main board includes a first power supply, a first control board interface, a first induction board interface, a second MCU, a first plasma generator fan drive and a first motor heating drive.

10. The plasma hand dryer according to claim 9, characterized in that: The brushless mainboard includes a second power supply, a motor driver, a third MCU, a second induction board interface, a second control board interface, a heater, and a negative ion generator fan driver.

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