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Hearing aid dry sterilization box working principle and invention patent

Hearing aid dry sterilization box working principle and invention patent

The present invention relates to a sterilization and sterilization apparatus for a hearing aid comprising a housing, a housing cover connected to the housing, the housing cover and the housing forming a receiving chamber for accommodating the hearing aid, Wherein the first ultraviolet tube emits ultraviolet light having a wavelength of 200-280 nm and the second ultraviolet light tube emits light at a wavelength of 160 to 120 nm, and at least one set of a second ultraviolet light tube, 200nm UV light. The invention has the advantages of super strong and thorough sterilization effect by the high intensity of the ultraviolet light of 254nm and the strong oxidation of ozone produced by the combination of ultraviolet light and air at 185nm, and the setting of the specular reflection layer enlarges the ultraviolet light Irradiation range, safety switch to avoid UV burns the eyes and skin to ensure the safety of the user, through the use of multiple patch PTC thermistor dry hearing aids, inhibit the propagation of bacteria.
A sterilization and sterilization apparatus for a hearing aid includes a housing, a housing cover connected to the housing, and a casing cover and a housing forming a receiving chamber for accommodating the hearing aid, characterized in that the The housing is provided with at least one set of first ultraviolet light tubes and at least one set of second ultraviolet light tubes, the first ultraviolet light tube emitting ultraviolet light having a wavelength of 200-280 nm, the second ultraviolet light tube emitting light having a wavelength of 160 -200nm UV light.

 
The reset circuit 30 includes C2 and R1, and the system is automatically reset. When the power is turned on, that is, when the Vcc power is turned on, the voltage on the capacitor C2 can not be changed, the instantaneous C2 is equivalent to the short circuit, Vcc power supply voltage falls on R1, this high level U PC6 / RST port, as long as meet the high level added to the RST can last 24 oscillation cycle can make the microcontroller reset.
The drying circuit 32 comprises at least two sets of independently operated heat generating elements Rfz1-Rfzn, at least two transistors VT1-VTn, a plurality of heat generating elements of each heating element being connected in parallel, n being a positive integer greater than or equal to 2, each heat generating element One end of the parallel connection is connected with the + 5V DC power supply and the other end is connected to the emitter of the corresponding transistor. The base of each transistor is connected to the main control circuit 24 and the collector is connected to ground. In the present embodiment, the drying circuit 32 comprises three sets of independently operated heat generating elements, three triodes VT1, VT2, VT3 connected to three sets of heat generating elements, and three sets of heat generating elements are applied to the PCB board 34 in the housing 2 , The three sets of heat generating elements are arranged on the PCB board 34, each of which is distributed evenly, and the heat generated by the heat generating element can be moved upward along the vent hole 14, and the hearing aid is placed on the transparent shelf 12 to be dried. Preferably, the three heat generating elements include A, B, and C, respectively. As shown in Fig. 3, the heat generating elements of Group A include five Rfz1, the heat generating elements of Group B include eight Rfz2, the heat generating elements of Group C include 12 Rfz3, Rfz1 parallel connection with the end of the +5 V DC power supply, the other end connected with the emitter of the transistor VT1, 8 Rfz2 parallel after the end of the connection with the +5 V DC power supply, the other end connected with the transistor VT2 emitter, 12 Rfz3 parallel to the end With the +5 V DC power supply connection, the other end connected with the emitter of the transistor VT3, transistor VT1, VT2, VT3 base and the microcontroller U1 PB1 port, PB2 port, PB3 port connection, transistor VT1, VT2, VT3 collector Are connected with the ground. The drying circuit 32 is provided with three heating zones, which are issued by the single-chip microcomputer to realize the sub-period, the segmentation alternately, the crossing and the superposition heating, so as to keep the temperature of the disinfection device constant. Transceiver VT1, VT2, VT3 conduction, Rfz1, Rfz2, Rfz3 have electricity; PB1 mouth, PB2 mouth, PB3 port high level, the transistor VT1, VT2, PB2 port, PB2 port low level , VT3 cut off, Rfz1, Rfz2, Rfz3 loss of power to stop heating. Rfz1, Rfz2, Rfz3 are used SMD PTC linear thermistor, dense array layout, hot spots, dense, fine, wide distribution does not exist dead, with uniform heat, fast heating characteristics, due to chip linear Thermistor is made of PTC material with a positive temperature coefficient, when the thermistor through the current heat when the temperature increases, the corresponding increase in resistance, so that the corresponding current decreases, so the heat is also reduced accordingly, the temperature corresponding Down and in a constant temperature state, with automatic temperature control performance.

The sub-region divides the arrangement and distribution of the heating elements into a plurality of regions, and the sub-periods cut the entire heating and drying process into a plurality of periods.

Now to time 4h, three regions, three times as an example:

Disinfection and sterilization device start to start the work to the temperature set to the upper temperature limit for the heating stage, the heating process takes 20 minutes. And then the working period is 1 hour for the first period of insulation; the first insulation period to 2 hours after the second time for the second insulation period; after the second insulation period to the end of the third insulation period. Fig. 2 is a schematic diagram showing the division of the three regions of the present embodiment. There are five heating elements Rfz1 in the A region, eight heating elements Rfz2 in the B region and 12 heating elements Rfz3 in the C region. The above arrangement is based on the uniformity of the heating elements. A region of the heating element at least because the A area work in the first period of insulation, waste heat the largest.

Sub-area, sub-time alternation, crossover, superposition heating is a new intelligent heating. In the area, the finer the time period is, the more the heating temperature is, and the combination of the area and the time period may be arbitrarily combined.

The first ultraviolet light tube 8, the second ultraviolet light tube 10, the electronic ballast AP1, the transistor VT form a sterilization circuit 36, and is controlled by the PC3 port of the single chip U1. PC3 port high, the electronic ballast AP1 lit the first UV tube 8 and the second UV tube 10, issued by ultraviolet light, to achieve double sterilization. The safety switch 16 outputs a signal to the PD3 port of the microcontroller U1 through the inverter IC to effect conduction or disconnection of the power supply to the first ultraviolet light tube 8 and the second ultraviolet light tube 10.

In addition, the display circuit 38 and the battery detection circuit 40 may be provided in order to facilitate knowing the drying timing time and detecting the electric power of the hearing aid.

The display circuit 38 uses a dot matrix LCD module LCD to display text, symbols and graphics. A, time display: set time, 2h, 4h, 6h; timing start time, 24-hour system; real-time, 24-hour system, by the second increase. B, temperature display: real-time temperature. C, power display: the battery graphics for the space, the text shows the battery failure; battery graphics have a grid, the text shows power; battery graphics have two cells, the text shows the lack of electricity; battery power for three grid full, text display Sufficient power;

The battery detection circuit 40 uses the ATmega8 microcontroller U1 internal analog-to-digital converter ADC to detect the battery voltage to determine the quality of the battery. SCM ATmega8 provides 6-way successive approximation ADC, which, ADC0-ADC3 these four channels to provide 10-bit conversion accuracy, ADC4, ADC5 two channels only provide 8-bit conversion accuracy. This circuit uses ADC0 to detect the voltage level. In the test, as long as the battery is placed in the detection groove 42 of the housing 2, it is pushed in contact with the pole piece (not shown) in the detection groove 42, and the pole piece has a positive electrode, a negative electrode, a pole piece Of the positive and the microcontroller U1 PC0 port connection, the negative ground, you can know the battery is good or bad. Test results from the LCD to graphics and text display, divided into four states: the battery graphics as a space, the text shows the battery failure; battery graphics have a grid, the text shows power; battery graphics have two cells, the text shows the lack of electricity; When the power is three grid full, the text shows enough power.

work process:

The hearing aid is placed on the transparent shelf 12, the power is turned on, the system is automatically reset and initialized. Press the SB1 timing selection button 2 times, start the timer, the LCD display timing time 4h, the timing start time xx: xx and the instant time xx: xx incremented by the time. At the same time, DS18B20 temperature sensor to collect temperature data and the data from the bus to the microcontroller U by the microcontroller U processing, compared with the preset temperature, the results are far below the lower threshold, start the priority program, PB1 PB1, PB2 port, PB3 output low Level, all the heating zone of the drive drying circuit 32 is heated at the same time until the temperature data collected by the DS18B20 has reached the preset temperature upper limit threshold, the MCU U1 sends a command, PB2 port, PB3 port output high level shutdown drying circuit 32 Of the B heating zone and the C heating zone. The machine into the first insulation period, only by the A heating zone to compensate for heating to keep the temperature constant. Into the second period of the insulation device PB1 port output high level off A heating zone, PB3 port output low level open C heating zone heating insulation. Into the insulation period of the third stage PB3 port output high level off C heating zone, PB1 mouth, PB2 port output low level open A heating zone and B heating zone to add heating until the end of time 4h. At the same time, the secondary sterilization and disinfection during the heating process is set, and the operation is started automatically when the first heat storage period and the second heat storage period are entered. The first ultraviolet light tube 8 and the second ultraviolet light tube 10 emit 254 nm of ultraviolet light , 185nm ultraviolet light, the resulting ultraviolet light can be directly reflected by the mirror reflection layer 20 and reflected to the hearing aid, radiation intensity and irradiation range, sterilization thoroughly, every ten minutes after the automatic extinguishment. In addition, when the cover 4 is opened, the safety switch 16 transmits the signal to the microcontroller U1, the microcontroller U1 is turned into the emergency interrupt program to cut off the power supply of the first ultraviolet light tube 8 and the second ultraviolet light tube 10, the first ultraviolet light tube 8 And the second ultraviolet light tube 10 are extinguished to adequately protect the user's safety.

If the temperature is lower than the preset temperature during the heating and drying process, the original heating procedure will be automatically interrupted and the supplementary heating program will be preferentially entered. If the temperature is raised to the preset temperature, the heating program will be automatically withdrawn. When the detection is higher than the preset temperature, it will interrupt the insulation program and give priority to cut off the heating device power supply emergency program, to the temperature dropped to the default temperature will automatically withdraw from the emergency program to resume the insulation program.

The foregoing is intended to be illustrative of the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the contents of the specification, and it is necessary to determine the technical scope according to the scope of the claims.

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