阅读说明：本技术 一种中耳炎耳道喷药治疗仪控制电路 (Otitis media duct medicine spraying therapeutic apparatus control circuit ) 是由 陈陆 于 2021-09-26 设计创作，主要内容包括：本发明涉及医疗领域,尤其涉及一种中耳炎耳道喷药治疗仪控制电路。本发明的技术问题是：提供一种可以加快药液吸收速度,可以避免病人感到不适的中耳炎耳道喷药治疗仪控制电路。本发明的技术实施方案为：一种中耳炎耳道喷药治疗仪控制电路,包括有供电电源、第一温度传感器、第二温度传感器、温度调节电位器、测温电桥等；所述第一温度传感器、第二温度传感器和温度调节电位器都与测温电桥连接。本发明通过加热器对药液进行加热,加快药液的吸收速度,并且可以避免病人感到不适,通过温度调节电位器可以调节第一比较器电路和第二比较器电路的基准电压,调整最高的加热温度,避免药液温度过高。(The invention relates to the field of medical treatment, in particular to a control circuit of a drug spraying therapeutic apparatus for otitis media auditory canals. The technical problem of the invention is that: provides a control circuit of the otitis media ear canal medicine spraying therapeutic apparatus, which can accelerate the absorption speed of liquid medicine and avoid patients from feeling uncomfortable. The technical implementation scheme of the invention is as follows: a control circuit of a drug spraying therapeutic apparatus for otitis media auditory meatus comprises a power supply, a first temperature sensor, a second temperature sensor, a temperature adjusting potentiometer, a temperature measuring bridge and the like; the first temperature sensor, the second temperature sensor and the temperature adjusting potentiometer are all connected with the temperature measuring bridge. The liquid medicine is heated by the heater, so that the absorption speed of the liquid medicine is increased, discomfort of a patient can be avoided, the reference voltages of the first comparator circuit and the second comparator circuit can be adjusted by the temperature adjusting potentiometer, the highest heating temperature is adjusted, and overhigh temperature of the liquid medicine is avoided.)

1. A control circuit of a drug spraying therapeutic apparatus for otitis media auditory meatus is characterized by comprising a power supply (1), a first temperature sensor (2), a second temperature sensor (3), a temperature adjusting potentiometer (4), a temperature measuring bridge (5), a first comparator circuit (6), a first indicator lamp (7), a second comparator circuit (8), a second indicator lamp (9), a time-base oscillation circuit (10), a heating circuit (11), a heater (12), a touch switch (13), a first potentiometer (14), a timing control circuit (15), a driving circuit (16) and a liquid pump (17), wherein the first temperature sensor (2), the second temperature sensor (3) and the temperature adjusting potentiometer (4) are all connected with the temperature measuring bridge (5), the input ends of the first comparator circuit (6) and the second comparator circuit (8) are all connected with the temperature measuring bridge (5), the output end of the first comparator circuit (6) is connected with the first indicator lamp (7), the output end of the second comparator circuit (8) is connected with the second indicator lamp (9), the output end of the second comparator circuit (8) is connected with the input end of the time-base oscillation circuit (10), the output end of the time-base oscillation circuit (10) is connected with the input end of the heating circuit (11), the output end of the heating circuit (11) is connected with the heater (12), the touch switch (13) and the first potentiometer (14) are both connected with the input end of the timing control circuit (15), the output end of the timing control circuit (15) is connected with the input end of the driving circuit (16), the output end of the driving circuit (16) is connected with the liquid pump (17), and the power supply (1) is provided with the first temperature sensor (2), the second temperature sensor (3), The temperature control potentiometer (4), the temperature measuring bridge (5), the first comparator circuit (6), the first indicator light (7), the second comparator circuit (8), the second indicator light (9), the time-base oscillation circuit (10), the heating circuit (11), the heater (12), the touch switch (13), the first potentiometer (14), the timing control circuit (15), the driving circuit (16) and the liquid pump (17) supply power.

2. The otitis media ear canal medicine spraying treatment instrument control circuit according to claim 1, wherein the temperature measuring bridge (5) comprises a thermistor RT1, a thermistor RT2, a diode D1, a resistor R3 and a resistor R4, the resistor R3 is connected in series with a resistor R4, a thermistor RT1 and a thermistor RT2, the other end of the resistor R3 is connected with +9V, the other end of the thermistor RT2 is connected with the ground, the anode of the diode D1 is connected with the ground, and the cathode of the diode D1 is connected with the series connection middle point of the resistor R3 and the resistor R4.

3. The control circuit of the otitis media ear canal spray therapeutic apparatus according to claim 2, wherein the first comparator circuit (6) comprises an operational amplifier LM393A-U1, a resistor R1, a resistor R2, a resistor R6, an electrolytic capacitor EC1, a light emitting diode VD1 and a light emitting diode VD2, the 4 feet of the operational amplifier LM393A-U1 are grounded, the 8 feet of the operational amplifier LM393A-U1 are connected with +9V, the 1 foot of the operational amplifier LM393A-U A is connected with the 6 feet thereof, the 1 foot of the operational amplifier LM393A-U A is connected with the resistor R A in series, the 1 foot of the operational amplifier LM393A-U A is connected with the electrolytic capacitor EC A in series, the 1 foot of the operational amplifier LM393A-U A is connected with the light emitting diode VD A and the resistor R A in series, the other end of the resistor R A is grounded, the foot of the operational amplifier LM393A-U A is connected with the light emitting diode VD A and the light emitting diode VD A in series, the other end of the resistor R1 is grounded, the 5 feet of the operational amplifier LM393A-U1 are connected with the series middle point of the resistor R3 and the resistor R4, and the 3 feet of the operational amplifier LM393A-U1 are connected with the series middle point of the resistor R4 and the thermistor RT 1.

4. The control circuit of the otitis media ear canal spray therapy device according to claim 3, wherein the temperature-adjusting potentiometer (4) is a potentiometer VR2, one end of the potentiometer VR2 is connected with the series connection middle point of a resistor R3 and a resistor R4, the other end of the potentiometer VR2 is grounded, and the 2 pin of the operational amplifier LM393A-U1 is connected with the adjustable end of the potentiometer VR 2.

5. The control circuit of otitis media ear canal medicine spraying therapeutic apparatus according to claim 4, wherein said time base oscillation circuit (10) comprises a time base integrated circuit NE555-U3, a resistor R5, a potentiometer VR1, a capacitor C1 and a capacitor C2, wherein 1 pin of said time base integrated circuit NE555-U3 is grounded, 8 pins of said time base integrated circuit NE555-U3 are connected with +9V, 4 pins of said time base integrated circuit NE555-U3 are connected with 1 pin of an operational amplifier LM393A-U1, 2 pins of said time base integrated circuit NE555-U3 are connected with 6 pins thereof, 5 pins of said time base integrated circuit NE555-U3 are connected with a capacitor C1 in series, said capacitor C2 is connected with a resistor R5 and a potentiometer VR1 in series, the other end of said potentiometer VR1 is connected with an adjustable terminal thereof with +9V, 6 pins of said time base integrated circuit NE555-U3 are connected with a resistor C2 and a resistor R5 in series, the pin 7 of the time base integrated circuit NE555-U3 is connected with the series connection middle point of the resistor R5 and the potentiometer VR 1.

6. The otitis media ear canal spray therapy apparatus control circuit according to claim 5, wherein said heating circuit (11) comprises a photo-electric coupler OPTOISO1-U2, a resistor R8, a resistor R9, a diode D2, a light emitting diode VD3, a relay RL1 and a heater PTC1, the 3 pin of said time base integrated circuit NE555-U3 is connected with the anode of a photo-electric coupler OPTOISO1-U2, the cathode series resistor R8 of said photo-electric coupler OPTOISO1-U2 is grounded, the emitter of said photo-electric coupler OPTOISO1-U2 is grounded, the collector series resistor R2 of said photo-electric coupler OPTOISO 2-U2 and the cathode of said light emitting diode VD2, the anode of said light emitting diode VD2 is connected with +15V, the collector of said photo-electric coupler OPTOISO 2-U2 is connected with the anode of said diode D2, the cathode of said diode D2 is connected with the cathode of said photo-TOISO 3615V, the collector coil of said photo-ISO 2 and the relay RL2 are connected with the collector of said photo-ISO 2, the other end of the coil of the relay RL1 is connected with +15V, the COM end of the relay RL1 is connected with the alternating current L end, the NO end of the relay RL1 is connected with one end of the heater PTC1, and the other end of the heater PTC1 is connected with the alternating current N end.

7. The control circuit of the otitis media ear canal spray therapy apparatus according to claim 6, wherein the timing control circuit (15) comprises a time base integrated circuit NE555-U4, a capacitor C3 and a capacitor C4, wherein a pin 1 of the time base integrated circuit NE555-U4 is grounded, pins 4 and 8 of the time base integrated circuit NE555-U4 are connected with +9V, pins 6 and 7 of the time base integrated circuit NE555-U4 are connected with pins 5, a pin 5 of the time base integrated circuit NE555-U4 is connected with a capacitor C3 and a pin 7 of the time base integrated circuit NE555-U4 is connected with a capacitor C4.

8. The control circuit of claim 1, wherein the first potentiometer (14) is a potentiometer VR3, the pin 7 of the time base integrated circuit NE555-U4 is connected to one end of the potentiometer VR3, and the other end of the potentiometer VR3 and the adjustable end thereof are both connected to + 9V.

9. The otitis media ear canal medicine spraying therapeutic apparatus control circuit according to claim 7, wherein the driving circuit (16) comprises a relay RL2, a diode D3, a light emitting diode VD4, a resistor R7, a resistor R8 and a servo motor MG1, the 3-pin series diode D3 of the time base integrated circuit NE555-U4 is grounded, the resistor R7 is connected with the light emitting diode VD4 and the relay RL2 in series, the other end of the coil of the relay RL2 is grounded, the other end of the resistor R7 is connected with +9V, the 3-pin of the time base integrated circuit NE555-U4 is connected with the middle point of the series connection of the light emitting diode VD4 and the relay RL2, the COM end of the relay RL2 is connected with +9V, the NO end of the relay RL2 is connected with one end of the servo motor MG1, and the other end of the servo motor MG1 is grounded.

10. The control circuit of the otitis media ear canal spray therapy apparatus as claimed in claim 3, wherein the operational amplifier is LM 393A.

Technical Field

The invention relates to the field of medical treatment, in particular to a control circuit of a drug spraying therapeutic apparatus for otitis media auditory canals.

Background

Otitis media is inflammation occurring in the middle ear part, mainly manifested as ear pain, ear purulence and hearing loss, generally caused by bacteria such as pneumococcus and haemophilus influenzae, and is mainly treated by spraying at present, but the liquid medicine is generally cold, the absorption efficiency of the liquid medicine is not high, and secondly, the cold liquid medicine may cause discomfort for patients under the condition of relatively cold weather.

A control circuit of a medicine spraying therapeutic apparatus for otitis media auditory canals, which can accelerate the absorption of liquid medicine and avoid patients from feeling uncomfortable, is designed.

Disclosure of Invention

In order to overcome the defects that the liquid medicine is generally cold and the absorption efficiency of the liquid medicine is not high, and secondly, the cold liquid medicine can cause patients to feel uncomfortable under the condition of relatively cold weather, the technical problems of the invention are as follows: provides a control circuit of the otitis media ear canal medicine spraying therapeutic apparatus, which can accelerate the absorption speed of liquid medicine and avoid patients from feeling uncomfortable.

The technical implementation scheme of the invention is as follows: a control circuit of a drug spraying therapeutic apparatus for otitis media auditory meatus comprises a power supply, a first temperature sensor, a second temperature sensor, a temperature adjusting potentiometer, a temperature measuring bridge, a first comparator circuit, a first indicator lamp, a second comparator circuit, a second indicator lamp, a time-based oscillation circuit, a heating circuit, a heater, a touch switch, a first potentiometer, a timing control circuit, a driving circuit and a liquid pump, wherein the first temperature sensor, the second temperature sensor and the temperature adjusting potentiometer are all connected with the temperature measuring bridge, the input ends of the first comparator circuit and the second comparator circuit are all connected with the temperature measuring bridge, the output end of the first comparator circuit is connected with the first indicator lamp, the output end of the second comparator circuit is connected with the second indicator lamp, the output end of the second comparator circuit is connected with the input end of the time-based oscillation circuit, the output end of the time-base oscillation circuit is connected with the input end of the heating circuit, the output end of the heating circuit is connected with the heater, the touch switch and the first potentiometer are connected with the input end of the timing control circuit, the output end of the timing control circuit is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the liquid pump, and the power supply supplies power to the first temperature sensor, the second temperature sensor, the temperature adjusting potentiometer, the temperature measuring bridge, the first comparator circuit, the first indicator lamp, the second comparator circuit, the second indicator lamp, the time-base oscillation circuit, the heating circuit, the heater, the touch switch, the first potentiometer, the timing control circuit, the driving circuit and the liquid pump.

More preferably, the temperature measuring bridge comprises a thermistor RT1, a thermistor RT2, a diode D1, a resistor R3 and a resistor R4, the resistor R3 is connected in series with the resistor R4, the thermistor RT1 and the thermistor RT2, the other end of the resistor R3 is connected with +9V, the other end of the thermistor RT2 is grounded, the anode of the diode D1 is grounded, and the cathode of the diode D1 is connected with the middle point of the series connection of the resistor R3 and the resistor R4.

More preferably, the first comparator circuit comprises an operational amplifier LM 393-U, a resistor R, an electrolytic capacitor EC, a light emitting diode VD and a light emitting diode VD, wherein 4 feet of the operational amplifier LM 393-U are grounded, 8 feet of the operational amplifier LM 393-U are connected with +9V, 1 foot of the operational amplifier LM 393-U is connected with 6 feet thereof, a 1 foot series resistor R of the operational amplifier LM 393-U is grounded, a 1 foot series electrolytic capacitor EC of the operational amplifier LM 393-U is grounded, a 1 foot of the operational amplifier LM 393-U is connected with the light emitting diode VD and the resistor R in series, the other end of the resistor R is grounded, a 7 foot of the operational amplifier LM 393-U is connected with the light emitting diode VD and the resistor R in series, the other end of the resistor R is grounded, a 5 foot of the operational amplifier LM 393-U is connected with a series middle point of the resistor R and the resistor R, the 3 pins of the operational amplifier LM393A-U1 are connected with the series connection middle point of the resistor R4 and the thermistor RT 1.

More preferably, the temperature-adjusting potentiometer is a potentiometer VR2, one end of the potentiometer VR2 is connected with the middle point of the series connection of the resistor R3 and the resistor R4, the other end of the potentiometer VR2 is grounded, and the pin 2 of the operational amplifier LM393A-U1 is connected with the adjustable end of the potentiometer VR 2.

More preferably, the time base oscillation circuit comprises a time base integrated circuit NE555-U3, a resistor R5, a potentiometer VR1, a capacitor C1 and a capacitor C2, the pin 1 of the time base integrated circuit NE555-U3 is grounded, the pin 8 of the time base integrated circuit NE555-U3 is connected with +9V, the pins 4 of the time base integrated circuit NE555-U3 are connected with the pins 1 of the operational amplifier LM393A-U1, the 2 feet of the time base integrated circuit NE555-U3 are connected with the 6 feet thereof, the 5 feet series capacitor C1 of the time base integrated circuit NE555-U3 is grounded, the capacitor C2 is connected in series with a resistor R5 and a potentiometer VR1, the other end and the adjustable end of the potentiometer VR1 are both connected with +9V, the 6 pins of the time base integrated circuit NE555-U3 are connected with the series middle point of the capacitor C2 and the resistor R5, the pin 7 of the time base integrated circuit NE555-U3 is connected with the series connection middle point of the resistor R5 and the potentiometer VR 1.

More preferably, the heating circuit comprises a photo-electric coupler OPTOISO1-U2, a resistor R8, a resistor R9, a diode D2, a light emitting diode VD3, a relay RL1 and a heater PTC1, the 3 pin of the time-base integrated circuit NE555-U3 is connected with the anode of the photo-electric coupler OPTOISO1-U2, the cathode series resistor R2 of the photo-electric coupler OPTOISO1-U2 is grounded, the emitter of the photo-electric coupler OPTOISO 2-U2 is grounded, the collector series resistor R2 of the photo-electric coupler OPTOISO 2-U2 is connected with the cathode of the light emitting diode VD2, the anode of the light emitting diode VD2 is connected with +15V, the collector of the photo-optical coupler OPTOISO 2-U2 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with +15V, the coil of the photo-electric coupler OPTOISO 2 and the coil of the relay RL 72 are connected with the other end of the relay RL 72 and the relay RL 72, the COM end of the relay RL1 is connected with the end of alternating current L, the NO end of the relay RL1 is connected with one end of the heater PTC1, and the other end of the heater PTC1 is connected with the end of alternating current N.

More preferably, the timing control circuit comprises a time base integrated circuit NE555-U4, a capacitor C3 and a capacitor C4, wherein pin 1 of the time base integrated circuit NE555-U4 is grounded, pins 4 and 8 of the time base integrated circuit NE555-U4 are both connected with +9V, pin 6 and pin 7 of the time base integrated circuit NE555-U4 are connected with pin 7 of the time base integrated circuit NE555-U4, pin 5 series capacitor C3 of the time base integrated circuit NE555-U4 is grounded, and pin 7 series capacitor C4 of the time base integrated circuit NE555-U4 is grounded.

More preferably, the first potentiometer is a potentiometer VR3, the pin 7 of the time base integrated circuit NE555-U4 is connected with one end of the potentiometer VR3, and the other end and the adjustable end of the potentiometer VR3 are both connected with + 9V.

More preferably, the driving circuit comprises a relay RL2, a diode D3, a light emitting diode VD4, a resistor R7, a resistor R8 and a servo motor MG1, the 3-pin series diode D3 of the time base integrated circuit NE555-U4 is grounded, the resistor R7 is connected in series with the light emitting diode VD4 and the relay RL2, the other end of the coil of the relay RL2 is grounded, the other end of the resistor R7 is connected with +9V, the 3-pin of the time base integrated circuit NE555-U4 is connected with the series middle point of the light emitting diode VD4 and the relay RL2, the COM of the relay RL2 is connected with +9V, the NO end of the relay RL2 is connected with one end of the servo motor MG1, and the other end of the servo motor MG1 is grounded.

More preferably, the operational amplifier is of the type LM 393A.

The invention has the following advantages: the liquid medicine is heated by the heater, so that the absorption speed of the liquid medicine is increased, discomfort of a patient can be avoided, the reference voltages of the first comparator circuit and the second comparator circuit can be adjusted by the temperature adjusting potentiometer, the highest heating temperature is adjusted, and overhigh temperature of the liquid medicine is avoided.

Drawings

FIG. 1 is a block diagram of the circuit of the present invention.

Fig. 2 is a schematic circuit diagram of the present invention.

Number designation in the figures: 1-a power supply, 2-a first temperature sensor, 3-a second temperature sensor, 4-a temperature regulation potentiometer, 5-a temperature measuring bridge, 6-a first comparator circuit, 7-a first indicator light, 8-a second comparator circuit, 9-a second indicator light, 10-a time base oscillation circuit, 11-a heating circuit, 12-a heater, 13-a touch switch, 14-a first potentiometer, 15-a timing control circuit, 16-a driving circuit and 17-a liquid pump.

Detailed Description

The following further describes the technical solution with reference to specific embodiments, and it should be noted that: the words upper, lower, left, right, and the like used herein to indicate orientation are merely for the location of the illustrated structure in the corresponding figures. The serial numbers of the parts are themselves numbered herein, for example: first, second, etc. are used solely to distinguish one from another as to objects described herein, and do not have any sequential or technical meaning. The application states that: the connection and coupling, unless otherwise indicated, include both direct and indirect connections (couplings).

Example 1

A control circuit of a drug spraying therapeutic apparatus for otitis media auditory canals is shown in figure 1 and comprises a power supply 1, a first temperature sensor 2, a second temperature sensor 3, a temperature adjusting potentiometer 4, a temperature measuring bridge 5, a first comparator circuit 6, a first indicator lamp 7, a second comparator circuit 8, a second indicator lamp 9, a time base oscillation circuit 10, a heating circuit 11, a heater 12, a touch switch 13, a first potentiometer 14, a timing control circuit 15, a driving circuit 16 and a liquid pumping pump 17, wherein the first temperature sensor 2, the second temperature sensor 3 and the temperature adjusting potentiometer 4 are all connected with the temperature measuring bridge 5, the input ends of the first comparator circuit 6 and the second comparator circuit 8 are connected with the temperature measuring bridge 5, the output end of the first comparator circuit 6 is connected with the first indicator lamp 7, the output end of the second comparator circuit 8 is connected with the second indicator lamp 9, the output end of the second comparator circuit 8 is connected with the input end of the time-base oscillation circuit 10, the output end of the time-base oscillation circuit 10 is connected with the input end of the heating circuit 11, the output end of the heating circuit 11 is connected with the heater 12, the touch switch 13 and the first potentiometer 14 are both connected with the input end of the timing control circuit 15, the output end of the timing control circuit 15 is connected with the input end of the driving circuit 16, the output end of the driving circuit 16 is connected with the liquid pump 17, the power supply 1 is composed of a first temperature sensor 2, a second temperature sensor 3, a temperature adjusting potentiometer 4, a temperature measuring bridge 5, a first comparator circuit 6, a first indicator light 7, a second comparator circuit 8, a second indicator light 9, the time-base oscillation circuit 10, the heating circuit 11, the heater 12, the touch switch 13, a first potentiometer 14, a timing control circuit 15, The drive circuit 16 and the liquid pump 17 are powered.

After the control circuit of the otitis media ear canal medicine spraying therapeutic apparatus is powered on, the first temperature sensor 2 and the second temperature sensor 3 start to work, the first temperature sensor 2 and the second temperature sensor 3 can detect the temperature of the liquid medicine, then voltage signals are output, the voltage signals are input into the temperature measuring bridge 5, the temperature measuring bridge 5 inputs the voltage into the first comparator circuit 6 and the second comparator circuit 8, the first comparator circuit 6 and the second comparator circuit 8 compare the detected voltage with the reference voltage, when the detected voltage is less than the reference voltage, the first indicator lamp 7 is lightened, the time-base oscillation circuit 10 controls the heater 12 to work through the heating circuit 11, the heater 12 heats the liquid medicine, the absorption speed of the liquid medicine is accelerated, the discomfort of a patient can be avoided, the reference voltage of the first comparator circuit 6 and the second comparator circuit 8 can be adjusted through the temperature adjusting potentiometer 4, the highest heating temperature is adjusted, the phenomenon that the temperature of liquid medicine is too high is avoided, when the detection voltage is larger than the reference voltage, the heater 12 is turned off, the second indicator light 9 is turned on, then the timing time of the timing control circuit 15 is adjusted by the patient through the first potentiometer 14, the touch switch 13 is touched, the timing control circuit 15 controls the liquid pump 17 to work through the driving circuit 16, the liquid pump 17 sprays the liquid medicine to the ears of the patient, the timing control circuit 15 starts to time, and after the time is up, the liquid pump 17 is turned off. After the control circuit of the otitis media ear canal medicine spraying therapeutic apparatus is powered off, the first temperature sensor 2 and the second temperature sensor 3 are closed, and the first indicator light 7 and the second indicator light 9 are turned off.

Example 2

The utility model provides a medicine therapeutic instrument control circuit is spouted in otitis media duct, as shown in fig. 2, temperature measurement electric bridge 5 is including thermistor RT1, thermistor RT2, diode D1, resistance R3 and resistance R4, resistance R3 series resistance R4, thermistor RT1 and thermistor RT2, another termination +9V of resistance R3, thermistor RT 2's other end ground connection, diode D1's positive pole ground connection, diode D1's negative pole and resistance R3 and resistance R4's series connection intermediate point are connected.

The first comparator circuit 6 comprises an operational amplifier LM 393-U, a resistor R, an electrolytic capacitor EC, a light emitting diode VD and a light emitting diode VD, wherein 4 feet of the operational amplifier LM 393-U are grounded, 8 feet of the operational amplifier LM 393-U are connected with +9V, 1 foot of the operational amplifier LM 393-U is connected with 6 feet of the operational amplifier LM 393-U, a 1 foot series resistor R of the operational amplifier LM 393-U is grounded, a 1 foot of the operational amplifier LM 393-U is connected with the electrolytic capacitor EC in series and is grounded, a 1 foot of the operational amplifier LM 393-U is connected with the light emitting diode VD and the resistor R in series, the other end of the resistor R is grounded, a 7 foot of the operational amplifier LM 393-U is connected with the light emitting diode VD and the resistor R in series and the other end of the resistor R is grounded, a 5 foot of the operational amplifier LM 393-U is connected with the series intermediate point of the resistor R and the resistor R, the 3 pins of the operational amplifier LM393A-U1 are connected with the series connection middle point of the resistor R4 and the thermistor RT 1.

The temperature adjusting potentiometer 4 is a potentiometer VR2, one end of the potentiometer VR2 is connected with the series middle point of a resistor R3 and a resistor R4, the other end of the potentiometer VR2 is grounded, and the pin 2 of the operational amplifier LM393A-U1 is connected with the adjustable end of the potentiometer VR 2.

The time base oscillation circuit 10 comprises a time base integrated circuit NE555-U3, a resistor R5, a potentiometer VR1, a capacitor C1 and a capacitor C2, the pin 1 of the time base integrated circuit NE555-U3 is grounded, the pin 8 of the time base integrated circuit NE555-U3 is connected with +9V, the pins 4 of the time base integrated circuit NE555-U3 are connected with the pins 1 of the operational amplifier LM393A-U1, the 2 feet of the time base integrated circuit NE555-U3 are connected with the 6 feet thereof, the 5 feet series capacitor C1 of the time base integrated circuit NE555-U3 is grounded, the capacitor C2 is connected in series with a resistor R5 and a potentiometer VR1, the other end and the adjustable end of the potentiometer VR1 are both connected with +9V, the 6 pins of the time base integrated circuit NE555-U3 are connected with the series middle point of the capacitor C2 and the resistor R5, the pin 7 of the time base integrated circuit NE555-U3 is connected with the series connection middle point of the resistor R5 and the potentiometer VR 1.

The heating circuit 11 comprises a photoelectric coupler OPTOISO1-U2, a resistor R8, a resistor R9, a diode D2, a light emitting diode VD3, a relay RL1 and a heater PTC1, the 3 feet of the time base integrated circuit NE555-U3 are connected with the anode of the photoelectric coupler OPTOISO1-U2, the cathode series resistor R2 of the photoelectric coupler OPTOISO1-U2 is grounded, the emitter of the photoelectric coupler OPTOISO 2-U2 is grounded, the collector series resistor R2 of the photoelectric coupler OPTOISO 2-U2 is connected with the cathode of the light emitting diode VD2, the anode of the light emitting diode VD2 is connected with +15V, the collector of the photoelectric coupler OPTOISO 2-U2 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with +15V, the collector coil of the photoelectric coupler OPTOISO 2-U2 and the coil of the relay RL 72 are connected with the other end of the relay RL 3615V, the COM end of the relay RL1 is connected with the end of alternating current L, the NO end of the relay RL1 is connected with one end of the heater PTC1, and the other end of the heater PTC1 is connected with the end of alternating current N.

The timing control circuit 15 comprises a time base integrated circuit NE555-U4, a capacitor C3 and a capacitor C4, wherein a pin 1 of the time base integrated circuit NE555-U4 is grounded, pins 4 and 8 of the time base integrated circuit NE555-U4 are connected with +9V, a pin 6 of the time base integrated circuit NE555-U4 is connected with a pin 7 of the time base integrated circuit NE555-U4, a pin 5 series capacitor C3 of the time base integrated circuit NE555-U4 is grounded, and a pin 7 series capacitor C4 of the time base integrated circuit NE555-U4 is grounded.

The first potentiometer 14 is a potentiometer VR3, the pin 7 of the time base integrated circuit NE555-U4 is connected with one end of the potentiometer VR3, and the other end and the adjustable end of the potentiometer VR3 are both connected with + 9V.

The driving circuit 16 comprises a relay RL2, a diode D3, a light emitting diode VD4, a resistor R7, a resistor R8 and a servo motor MG1, wherein a 3 pin series diode D3 of the time base integrated circuit NE555-U4 is grounded, a resistor R7 is connected in series with a light emitting diode VD4 and a relay RL2, the other end of a coil of the relay RL2 is grounded, the other end of the resistor R7 is connected with +9V, the 3 pin of the time base integrated circuit NE555-U4 is connected with a series connection middle point of the light emitting diode 63VD 92 and the relay RL2, the COM end of the relay RL2 is connected with +9V, the NO end of the relay RL2 is connected with one end of the servo motor MG1, and the other end of the servo motor MG1 is grounded.

After a control circuit of the otitis media ear canal medicine spraying therapeutic apparatus is powered on, a thermistor RT1 and a thermistor RT2 start to work, the thermistor RT1 and the thermistor RT2 can detect the temperature of liquid medicine, then voltage signals are output and input into operational amplifiers LM393A-U1, the operational amplifiers LM393A-U1 compare the detection voltage with reference voltage, the reference voltage of the operational amplifiers LM393A-U1 can be adjusted through a potentiometer VR2 to adjust the highest heating temperature so as to avoid overhigh temperature of the liquid medicine, when the detection voltage is smaller than the reference voltage, the operational amplifiers LM393A-U1 output high level, a light emitting diode VD1 lights, a time base integrated circuit NE555-U3 outputs high level, a photocoupler OPTOISO1-U2 outputs low level, the light emitting diode VD3 lights, a relay RL1 is attracted, a heater 1 starts to work to heat the liquid medicine, when the detection voltage is larger than the reference voltage, the operational amplifier LM393A-U1 outputs a low level, the light emitting diode VD2 is lightened, the time base integrated circuit NE555-U3 outputs a low level, the photoelectric coupler OPTOISO1-U2 outputs a high level, the light emitting diode VD3 is extinguished, the relay RL1 is disconnected, the heater PTC1 is turned off, then the patient adjusts the timing time of the time base integrated circuit NE555-U4 through the potentiometer VR3, then the touch switch 13 is touched, the time base integrated circuit NE555-U4 outputs a high level, the relay RL2 is attracted, the light emitting diode VD4 is lightened, the servo motor MG1 starts to work, the liquid medicine is sprayed to the ear of the patient, the time base integrated circuit 555-U4 starts timing, and the servo motor MG1 is turned off after the time. After the control circuit of the otitis media ear canal medicine spraying therapeutic apparatus is powered off, the thermistor RT1 and the thermistor RT2 are closed, and the light emitting diode VD1 and the light emitting diode VD2 are turned off.

It should be understood that the above description is for exemplary purposes only and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention are intended to be included within the scope of the claims herein.