CN113268032A - Control circuit of constant-temperature injection liquid medicine heating device - Google Patents

Abstract

The invention relates to the field of medical instruments, in particular to a control circuit of a constant-temperature injection liquid medicine heating device. The technical problem of the invention is that: provided is a control circuit for a constant-temperature injection drug solution heating device, which can heat a drug solution and can sterilize an injection site of a patient. The invention provides a control circuit of a constant-temperature injection liquid medicine heating device, which comprises a power supply unit, a temperature sensor, a first amplification comparator circuit, a first hysteresis comparator circuit, a first indicator lamp, a first relay control circuit and a heater, wherein the temperature sensor is connected with the input end of the first amplification comparator circuit, the first indicator lamp is connected with the output end of the first amplification comparator circuit, and the output end of the first amplification comparator circuit is connected with the input end of the first hysteresis comparator circuit. The invention can automatically heat the liquid medicine through the heater, thereby avoiding discomfort of a patient when the liquid medicine is injected.

Description

Control circuit of constant-temperature injection liquid medicine heating device

Technical Field

The invention relates to the field of medical instruments, in particular to a control circuit of a constant-temperature injection liquid medicine heating device.

Background

The subcutaneous injection is a method of injecting a liquid medicine into subcutaneous tissues, namely, injecting the liquid medicine between skin and muscle through the skin, and generally adopting the subcutaneous injection under the conditions that the medicine effect needs to be rapidly achieved, oral administration cannot be carried out, local anesthetic administration, preoperative medicine supply, preventive vaccination and the like are required.

However, in cold winter, the patient feels uncomfortable when the cold liquid medicine is injected into the body of the patient, and after the injection is finished, medical staff is required to smear alcohol on the injection part of the patient for disinfection, which is troublesome, so that the efficiency is affected.

Disclosure of Invention

In order to overcome the defects that the patient feels uncomfortable when cold liquid medicine is injected into the body of the patient, and the medical staff is required to smear alcohol to sterilize the injection part of the patient after the injection is finished, the invention has the technical problems that: provided is a control circuit for a constant-temperature injection drug solution heating device, which can heat a drug solution and can sterilize an injection site of a patient.

The technical implementation scheme of the invention is as follows: a control circuit of a constant-temperature injection liquid medicine heating device comprises a power supply unit, a temperature sensor, a first amplification comparator circuit, a first hysteresis comparator circuit, a first indicator light, a first relay control circuit and a heater, the temperature sensor is connected with the input end of the first amplification comparator circuit, the first indicator light is connected with the output end of the first amplification comparator circuit, the output of the first amplified comparator circuit is connected to the input of the first hysteretic comparator circuit, the output of the first hysteresis comparator circuit is connected to the input of the first relay control circuit, the heater is connected with the output end of the first relay control circuit, and the power supply unit supplies power to the temperature sensor, the first amplification comparator circuit, the first hysteresis comparator circuit, the first indicator light, the first relay control circuit and the heater.

More preferably, the power supply device further comprises a first potentiometer, the first potentiometer is connected with the input end of the first amplification comparator circuit, and the power supply unit supplies power to the first potentiometer.

More preferably, still including touch switch, first JK trigger circuit, second relay control circuit and UV LED module, touch switch is connected with first JK trigger circuit's input, first JK trigger circuit's output is connected with second JK trigger circuit's input, second JK trigger circuit's output is connected with second relay control circuit's input, UV LED module is connected with second relay control circuit's output, power supply unit is touch switch, first JK trigger circuit, second relay control circuit and UV LED module power supply.

More preferably, the first amplifying comparator circuit comprises operational general amplifiers UA741-U4, a potentiometer VR1, resistors R1-R2, a temperature sensor RT1 and a light emitting diode VD1, one end of the potentiometer VR1 is connected with +9V, the other end of the potentiometer VR1 is connected with a resistor R2 and a temperature sensor RT1 in series, the other end of the temperature sensor RT1 is grounded, one end of the resistor R1 is connected with +9V, the other end of the resistor R1 is connected with a light emitting diode VD1 in series, the cathode of the light emitting diode VD1 is grounded, the 2 feet of the operational general amplifiers UA741-U4 are connected with the node between the resistor R2 and the temperature sensor RT1, the 3 pins of the operational general amplifiers UA741-U4 are connected with the node between the resistor R1 and the light-emitting diode VD1, thepins 4 of the operational general amplifiers UA741-U4 are grounded, and thepins 7 of the operational general amplifiers UA741-U4 are connected with + 9V.

More preferably, the first hysteresis comparator circuit includes a time base integrated circuit NE555-U1, a capacitor C1, a resistor R3 and a light emitting diode VD2, wherein a pin 1 of the time base integrated circuit NE555-U1 is grounded, apin 2 of the time base integrated circuit NE555-U1 is connected to apin 6 thereof, apin 2 of the time base integrated circuit NE555-U1 is connected to apin 6 of the operational general-purpose amplifier UA741-U4, apin 3 of the time base integrated circuit NE555-U1 is connected in series with the resistor R3 and the light emitting diode VD2, a cathode of the light emitting diode VD2 is grounded, apin 4 of the time base integrated circuit 555-U1 is connected to +9V, apin 5 of the time base integrated circuit NE555-U1 is connected in series with the capacitor C1, the other end of the capacitor C1 is grounded, and apin 8 of the time base integrated circuit NE555-U1 is connected to + 9V.

More preferably, the first relay control circuit comprises a relay RL1, a diode D1, a heater PTC1, a light emitting diode VD3, resistors R5-R6 and a photocoupler OPTOISO1-U2, the anode of the photoelectric coupler OPTOISO1-U2 is connected with a resistor R5 in series, the other end of the resistor R5 is connected with thepin 3 of a time base integrated circuit NE555-U1, the cathode of the photoelectric coupler OPTOISO1-U2 is grounded, the emitter of the photoelectric coupler OPTOISO1-U2 is grounded, two ends of the relay RL1 are connected with a diode D1 in parallel, one end after parallel connection is connected with +12V, the other end after parallel connection is connected with the collector electrode of a photoelectric coupler OPTOISO1-U2, two ends of the diode D1 are connected with a light-emitting diode VD3 and a resistor R6 in parallel, the COM end of the relay RL1 is connected with +12V, the NO end of the relay RL1 is connected in series with a heater PTC1, and the other end of the heater PTC1 is grounded.

More preferably, the touch switch comprises a resistor R4, resistors R7 to R8, a triode Q1 and capacitors C2 to C3, an emitter of the triode Q1 and a base are connected in parallel with a capacitor C2, one end of the triode Q1 is connected with +12V, the other end of the triode Q1 is connected with the resistor R7 in series, the other end of the resistor R7 is grounded, two ends of the capacitor C2 are connected with the resistor R4 in parallel, the resistor R8 and the capacitor C3 are connected in parallel, one end of the triode Q8 and the other end of the triode Q3 are connected with the ground, and the other end of the triode Q1 is connected with a collector.

More preferably, the first JK flip-flop circuit is a dual JK flip-flop CD4027-U5, the 1 pin of the dual JK flip-flop CD4027-U5 is connected to the 13 pin thereof, the 3 pin of the dual JK flip-flop CD4027-U5 is connected to the collector of the transistor Q1, the 4 pins, 7 pins, 8 pins, and 9 pins of the dual JK flip-flop CD4027-U5 are connected to the 12 pin thereof, the 4 pin of the dual JK flip-flop CD4027-U5 is connected to the ground, the 5 pin of the dual JK flip-flop CD4027-U5 is connected to the 6 pin thereof, the 5 pin of the dual JK flip-flop CD4027-U5 is connected to the emitter of the transistor Q1, the 10 pins, 11 pins of the dual JK flip-flop CD4027-U5 are connected to the 16 pin thereof, and the 10 pin of the dual JK flip-flop CD4027-U5 is connected to the + 12V.

More preferably, the second relay control circuit includes resistors R9 to R11, light emitting diodes VD4, a relay RL2, a diode D2 and photocouplers opto 1 to U3, an anode series resistor R9 of the photocouplers opto 1 to U3, the other end of the resistor R9 is connected to the 14 pin of the double JK flip-flop CD4027 to U5, the cathode of the photocouplers opto 1 to U3 is grounded, the emitter of the photocouplers opto 1 to U3 is grounded, both ends of the relay RL2 are connected in parallel to a diode D2, one end of the parallel is connected to +12V, the other end of the parallel is connected to the collector of the photocouplers opto 1 to U3, both ends of the diode D2 are connected in parallel to a resistor R10 and a light emitting diode VD10, the COM +12V of the relay RL 10 is connected to the NO end of the relay RL 10 in series.

More preferably, the UV LED module comprises light emitting diodes VD 5-VD 22, the light emitting diodes VD5, VD11 and VD17 are connected in series to form a unit group, the light emitting diodes VD6, VD12 and VD18 are connected in series to form a unit group, the light emitting diodes VD10, VD13 and VD19 are connected in series to form a unit group, the light emitting diodes VD7, VD14 and VD20 are connected in series to form a unit group, the light emitting diodes VD8, VD15 and VD21 are connected in series to form a unit group, the light emitting diodes VD9, VD16 and VD22 are connected in series to form a unit group, the total of 6 unit groups of the UV LED module are connected in parallel, cathodes of the parallel connected unit groups are grounded, the parallel anode is connected with the other end of the resistor R11.

Compared with the prior art, the invention has the following advantages: 1. the invention can automatically heat the liquid medicine through the heater, thereby avoiding discomfort of a patient when the liquid medicine is injected.

2. The invention can adjust the rated value of the first hysteresis comparator circuit through the first potentiometer, thereby being convenient for people to use.

3. According to the invention, the UV LED module can automatically disinfect the injection part of the patient, and the operation is convenient.

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.

The parts are labeled as follows: 1. the power supply unit, 2, touch switch, 3, first JK trigger circuit, 4, temperature sensor, 5, first enlarged comparator circuit, 6, first hysteresis comparator circuit, 7, first pilot lamp, 8, first potentiometre, 9, first relay control circuit, 10, heater, 11, second JK trigger circuit, 12, second relay control circuit, 13, UV LED module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A control circuit of a constant-temperature injection liquid medicine heating device comprises a power supply unit 1, atemperature sensor 4, a firstamplification comparator circuit 5, a firsthysteresis comparator circuit 6, afirst indicator light 7, a first relay control circuit 9 and aheater 10, wherein thetemperature sensor 4 is connected with the input end of the firstamplification comparator circuit 5, thefirst indicator light 7 is connected with the output end of the firstamplification comparator circuit 5, the output end of the firstamplification comparator circuit 5 is connected with the input end of the firsthysteresis comparator circuit 6, the output end of the firsthysteresis comparator circuit 6 is connected with the input end of the first relay control circuit 9, theheater 10 is connected with the output end of the first relay control circuit 9, the power supply unit 1 comprises thetemperature sensor 4 and the firstamplification comparator circuit 5, and theheater 10, The firsthysteresis comparator circuit 6, thefirst indicator light 7, the first relay control circuit 9 and theheater 10 are powered.

When the control circuit of the constant temperature injection medicine heating device is electrified, thetemperature sensor 4 and the firstamplification comparator circuit 5 start to work, thefirst indicator lamp 7 lights up, thetemperature sensor 4 detects the temperature of the medicine, thetemperature sensor 4 sends a signal of the detected temperature to the firstamplification comparator circuit 5, the firstamplification comparator circuit 5 amplifies the signal and then transmits the signal to the firsthysteresis comparator circuit 6, the firsthysteresis comparator circuit 6 compares the detected temperature with a rated value, if the detected temperature is lower than the rated value, the firsthysteresis comparator circuit 6 controls the first relay control circuit 9 to work, the first relay control circuit 9 controls theheater 10 to work so as to heat the medicine, when the temperature of the medicine is higher than the rated value, the firsthysteresis comparator circuit 6 controls the first relay control circuit 9 to stop working, the first relay control circuit 9 controls theheater 10 to stop working, when the control circuit of the constant-temperature injection liquid medicine heating device is powered off, thetemperature sensor 4 and the firstamplification comparator circuit 5 stop working, and thefirst indicator light 7 is turned off.

Example 2

On the basis of embodiment 1, as shown in fig. 1, the power supply device further includes afirst potentiometer 8, thefirst potentiometer 8 is connected to an input end of the firstamplification comparator circuit 5, and the power supply unit 1 supplies power to thefirst potentiometer 8.

The medical staff can adjust the rating of the firsthysteresis comparator circuit 6 by means of thefirst potentiometer 8.

Still includingtouch switch 2, first JKtrigger circuit 3, second JKtrigger circuit 11, secondrelay control circuit 12 andUV LED module 13,touch switch 2 is connected with first JKtrigger circuit 3's input, first JKtrigger circuit 3's output is connected with second JKtrigger circuit 11's input, second JKtrigger circuit 11's output is connected with secondrelay control circuit 12's input,UV LED module 13 is connected with secondrelay control circuit 12's output, power supply unit 1 supplies power fortouch switch 2, first JKtrigger circuit 3, second JKtrigger circuit 11, secondrelay control circuit 12 andUV LED module 13.

After patient's injection is accomplished, medical personnel can touchswitch 2 once, make first JKtrigger circuit 3 work of beginning, first JKtrigger circuit 3 control second JKtrigger circuit 11 work of beginning, second JKtrigger circuit 11 control secondrelay control circuit 12 work, secondrelay control circuit 12 controlUV LED module 13 work, thereby disinfect patient's injection position, after a period of time, medicalpersonnel touch switch 2 once more, make first JKtrigger circuit 3, second JKtrigger circuit 11, secondrelay control circuit 12 andUV LED module 13 stop work.

Example 3

A control circuit of a constant temperature liquid medicine injection heating device, as shown in figure 2, the firstamplification comparator circuit 5 comprises a general operational amplifier UA741-U4, a potentiometer VR1, resistors R1-R2, a temperature sensor RT1 and a light emitting diode VD1, one end of the potentiometer VR1 is connected with +9V, the other end of the potentiometer VR1 is connected with a resistor R2 and a temperature sensor RT1 in series, the other end of the temperature sensor RT1 is grounded, one end of the resistor R1 is connected with +9V, the other end of the resistor R1 is connected with a light emitting diode VD1 in series, the cathode of the light emitting diode VD1 is grounded, the 2 pin of the general operational amplifier UA741-U4 is connected with the node between the resistor R2 and the temperature sensor RT1, the 3 pin of the general operational amplifier UA741-U4 is connected with the node between the resistor R1 and the light emitting diode VD1, the pin of the general operational amplifier UA-U741-U4 is grounded, thepins 7 of the operational general amplifiers UA741-U4 are connected with + 9V.

The firsthysteresis comparator circuit 6 comprises a time base integrated circuit NE555-U1, a capacitor C1, a resistor R3 and a light emitting diode VD2, wherein a pin 1 of the time base integrated circuit NE555-U1 is grounded, apin 2 of the time base integrated circuit NE555-U1 is connected with thepin 6 thereof, apin 2 of the time base integrated circuit NE555-U1 is connected with apin 6 of an operational general amplifier UA741-U4, apin 3 of the time base integrated circuit NE555-U1 is connected with the resistor R3 and the light emitting diode VD2 in series, a cathode of the light emitting diode VD2 is grounded, apin 4 of the time base integrated circuit NE555-U1 is connected with +9V, apin 5 of the time base integrated circuit 555-U1 is connected with the capacitor C1 in series, the other end of the capacitor C1 is grounded, and apin 8 of the time base integrated circuit NE555-U1 is connected with + 9V.

The first relay control circuit 9 comprises a relay RL1, a diode D1, a heater PTC1, a light emitting diode VD3, resistors R5-R6 and a photoelectric coupler OPTOISO1-U2, the anode of the photoelectric coupler OPTOISO1-U2 is connected with a resistor R5 in series, the other end of the resistor R5 is connected with thepin 3 of a time base integrated circuit NE555-U1, the cathode of the photoelectric coupler OPTOISO1-U2 is grounded, the emitter of the photoelectric coupler OPTOISO1-U2 is grounded, two ends of the relay RL1 are connected with a diode D1 in parallel, one end after parallel connection is connected with +12V, the other end after parallel connection is connected with the collector electrode of a photoelectric coupler OPTOISO1-U2, two ends of the diode D1 are connected with a light-emitting diode VD3 and a resistor R6 in parallel, the COM end of the relay RL1 is connected with +12V, the NO end of the relay RL1 is connected in series with a heater PTC1, and the other end of the heater PTC1 is grounded.

Thetouch switch 2 comprises a resistor R4, resistors R7-R8, a triode Q1 and capacitors C2-C3, an emitter of the triode Q1 is connected with a base in parallel with the capacitor C2, one end of the triode Q1 is connected with +12V after being connected in parallel, the other end of the triode Q7 is connected in series after being connected in parallel, the other end of the resistor R7 is grounded, two ends of the capacitor C2 are connected with a resistor R4 in parallel, the resistor R8 is connected with the capacitor C3 in parallel, one end of the resistor R8 is grounded after being connected in parallel, and the other end of the resistor R592 is connected with a collector of the triode Q1.

The first JKtrigger circuit 3 is a double JK trigger CD4027-U5, the 1 pin of the double JK trigger CD4027-U5 is connected with the 13 pins thereof, the 3 pin of the double JK trigger CD4027-U5 is connected with the collector of a triode Q1, the 4 pins, 7 pins, 8 pins and 9 pins of the double JK trigger CD4027-U5 are connected with the 12 pins thereof, the 4 pins of the double JK trigger CD4027-U5 are grounded, the 5 pins of the double JK trigger CD4027-U5 are connected with the 6 pins thereof, the 5 pins of the double JK trigger CD4027-U5 are connected with the emitter of the triode Q1, the 10 pins, 11 pins and 16 pins of the double JK trigger CD4027-U5 are connected with the 10 pins and 12 pins of the double JK trigger CD4027-U5 are connected with the + 12V.

The secondrelay control circuit 12 comprises resistors R9-R11, light emitting diodes VD4, a relay RL2, a diode D2 and photocouplers OPTOISO1-U3, an anode series resistor R9 of the photocouplers OPTOISO1-U3, the other end of the resistor R9 is connected with a 14 pin of a double JK trigger CD4027-U5, a cathode of the photocouplers OPTOISO1-U3 is grounded, emitters of the photocouplers OPTOISO1-U3 are grounded, two ends of the relay RL2 are connected with a diode D2 in parallel, one end of the parallel connection is connected with +12V, the other end of the parallel connection is connected with a collector of the photocouplers OPTOISO1-U3, two ends of the diode D2 are connected with a resistor R10 and a light emitting diode VD10 in parallel, a COM +12V end of the relay RL 10 is connected with an NO end of the relay RL 10 in series with the resistor R10.

TheUV LED module 13 comprises light emitting diodes VD 5-VD 22, the light emitting diodes VD5, VD11 and VD17 are connected in series to form a unit group, the light emitting diode VD6, the light emitting diode VD12 and the light emitting diode VD18 are connected in series to form a unit group, the light emitting diode VD10, the light emitting diode VD13 and the light emitting diode VD19 are connected in series to form a unit group, the light emitting diode VD7, the light emitting diode VD14 and the light emitting diode VD20 are connected in series to form a unit group, the light emitting diode VD8, the light emitting diode VD15 and the light emitting diode VD21 are connected in series to form a unit group, the light emitting diode VD9, the light emitting diode VD16 and the light emitting diode VD22 are connected in series to form a unit group, theUV LED module 13 has 6 cell groups in total, and is formed by connecting 6 cell groups in parallel, the cathode of the parallel connected cell groups is grounded, and the anode of the parallel connected cell groups is connected to the other end of the resistor R11.

When a control circuit of the constant-temperature liquid medicine injection heating device is electrified, a temperature sensor RT1 starts to work, a light emitting diode VD1 lights up, a temperature sensor RT1 detects the temperature of liquid medicine, the detected temperature is a signal and is sent to apin 2 of an operational general-purpose amplifier UA741-U4, the operational general-purpose amplifier UA741-U4 amplifies the signal and then transmits the signal to apin 2 of a time base integrated circuit NE555-U1, the time base integrated circuit NE555-U1 compares the detected temperature with a rated value, if the detected temperature is lower than the rated value, apin 3 of the time base integrated circuit NE555-U1 outputs a high level, light emitting diodes VD 2-VD 3 light up, a relay RL1 is attracted, a heater PTC1 starts to work so as to heat the liquid medicine, and when the temperature of the liquid medicine is higher than the rated value, apin 3 of the time base integrated circuit NE555-U1 outputs a low level, the light emitting diodes VD 2-VD 3 are extinguished, the relay RL1 is disconnected, the heater PTC1 stops working, medical personnel can adjust the rated value of the time base integrated circuit NE555-U1 through the potentiometer VR1, after the injection of the patient is completed, the medical staff can touch thetouch switch 2 to enable the 14 feet of the double JK triggers CD4027-U5 to output high level, the light emitting diode VD4 is lightened, the relay RL2 is attracted to enable the light emitting diodes VD 5-VD 22 to be lightened, thereby disinfecting the injection part of the patient, after a period of time, the medical staff touches thetouch switch 2, so that the 14 pins of the double JK triggers CD4027-U5 output low level, the light emitting diode VD4 is extinguished, the relay RL2 is disconnected, the light emitting diodes VD 5-VD 22 are extinguished, when the control circuit of the constant-temperature injection liquid medicine heating device is powered off, the temperature sensor RT1 stops working, and the light-emitting diode VD1 is extinguished.

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.

Claims (10)

1. A control circuit of a constant-temperature liquid medicine injection heating device is characterized by comprising a power supply unit (1), a temperature sensor (4), a first amplification comparator circuit (5), a first hysteresis comparator circuit (6), a first indicator light (7), a first relay control circuit (9) and a heater (10), wherein the temperature sensor (4) is connected with the input end of the first amplification comparator circuit (5), the first indicator light (7) is connected with the output end of the first amplification comparator circuit (5), the output end of the first amplification comparator circuit (5) is connected with the input end of the first hysteresis comparator circuit (6), the output end of the first hysteresis comparator circuit (6) is connected with the input end of the first relay control circuit (9), and the heater (10) is connected with the output end of the first relay control circuit (9), the power supply unit (1) supplies power to the temperature sensor (4), the first amplification comparator circuit (5), the first hysteresis comparator circuit (6), the first indicator light (7), the first relay control circuit (9) and the heater (10).

2. The control circuit of a constant temperature heating device for injecting liquid medicine according to claim 1, characterized in that it further comprises a first potentiometer (8), said first potentiometer (8) is connected with the input terminal of the first amplifying comparator circuit (5), said power supply unit (1) supplies power to the first potentiometer (8).

3. The control circuit of the constant-temperature liquid medicine injection heating device according to claim 2, further comprising a touch switch (2), a first JK trigger circuit (3), a second JK trigger circuit (11), a second relay control circuit (12) and a UV LED module (13), wherein the touch switch (2) is connected with an input end of the first JK trigger circuit (3), an output end of the first JK trigger circuit (3) is connected with an input end of the second JK trigger circuit (11), an output end of the second JK trigger circuit (11) is connected with an input end of the second relay control circuit (12), the UV LED module (13) is connected with an output end of the second relay control circuit (12), and the power supply unit (1) is the touch switch (2), the first JK trigger circuit (3), the second JK trigger circuit (11), The second relay control circuit (12) and the UV LED module (13) supply power.

4. The control circuit of a constant temperature liquid medicine injection heating apparatus according to claim 3, wherein said first amplification comparator circuit (5) comprises a general operational amplifier UA741-U4, a potentiometer VR1, resistors R1-R2, a temperature sensor RT1 and a light emitting diode VD1, one end of said potentiometer VR1 is connected with +9V, the other end of said potentiometer VR1 is connected with a resistor R2 and a temperature sensor RT1 in series, the other end of said temperature sensor RT1 is connected with ground, one end of said resistor R1 is connected with +9V, the other end of said resistor R1 is connected with a light emitting diode VD1 in series, the cathode of said light emitting diode VD1 is connected with ground, the node between the 2 pin of said general operational amplifier UA741-U4 and the resistor R2 and the temperature sensor RT1 is connected, the 3 pin of said general operational amplifier UA741-U4 is connected with the node between the resistor R1 and the light emitting diode VD1, the pins 4 of the operational general amplifiers UA741-U4 are grounded, and the pins 7 of the operational general amplifiers UA741-U4 are connected with + 9V.

5. The control circuit of a constant temperature liquid medicine injection heating device according to claim 4, the first hysteresis comparator circuit (6) comprises a time base integrated circuit NE555-U1, a capacitor C1, a resistor R3 and a light emitting diode VD2, the pin 1 of the time base integrated circuit NE555-U1 is grounded, the pin 2 of the time base integrated circuit NE555-U1 is connected with the pin 6 thereof, the pins 2 of the time base integrated circuit NE555-U1 are connected with the pins 6 of the operational general amplifiers UA741-U4, the 3-pin series resistor R3 and the light-emitting diode VD2 of the time base integrated circuit NE555-U1, the cathode of the light emitting diode VD2 is grounded, the 4 pins of the time base integrated circuit NE555-U1 are connected with +9V, the 5-pin of the time base integrated circuit NE555-U1 is connected in series with a capacitor C1, the other end of the capacitor C1 is grounded, and the 8-pin of the time base integrated circuit NE555-U1 is connected with + 9V.

6. The control circuit of a constant temperature injection medicine heating device according to claim 5, wherein the first relay control circuit (9) comprises a relay RL1, a diode D1, a heater PTC1, a light emitting diode VD3, resistors R5-R6 and a photoelectric coupler OPTOISO1-U2, an anode series resistor R5 of the photoelectric coupler OPTOISO1-U2, the other end of the resistor R5 is connected with the 3-pin of a time base integrated circuit NE555-U1, the cathode of the photoelectric coupler OPTOISO1-U2 is grounded, the emitter of the photoelectric coupler OPTOISO1-U2 is grounded, two ends of the relay RL1 are connected in parallel with a diode D1, one end of the parallel connection is connected with +12V, the other end of the parallel connection is connected with the collector of the photoelectric coupler OPTOISO1-U2, two ends of the diode D1 are connected in parallel with a light emitting diode VD3 and a resistor R6, and the other end of the resistor COM 1 is connected with + COM 3612V, the NO end of the relay RL1 is connected in series with a heater PTC1, and the other end of the heater PTC1 is grounded.

7. The control circuit of a constant temperature liquid medicine injection heating device according to claim 6, wherein the touch switch (2) comprises a resistor R4, resistors R7-R8, a triode Q1 and capacitors C2-C3, an emitter of the triode Q1 and a base are connected in parallel with a capacitor C2, one end of the triode Q1 is connected with +12V after being connected in parallel, the other end of the triode Q7 is connected with a resistor R7 in series, the other end of the resistor R7 is grounded, two ends of the capacitor C2 are connected with a resistor R4 in parallel, the resistor R8 and the capacitor C3 are connected in parallel, one end of the triode Q1 is grounded, and the other end of the triode Q1 is connected with a collector electrode after being connected in parallel.

8. The control circuit of claim 7, wherein said first JK flip-flop circuit (3) is a dual JK flip-flop CD4027-U5, said dual JK flip-flop CD4027-U5 has its 1 pin connected to its 13 pin, said dual JK flip-flop CD4027-U5 has its 3 pin connected to the collector of the transistor Q1, said dual JK flip-flop CD4027-U5 has its 4, 7, 8, 9 and 12 pins connected, said dual JK flip-flop CD4027-U5 has its 4 pin grounded, said dual JK flip-flop CD4027-U5 has its 5 pin connected to its 6 pin, said dual JK flip-flop CD4027-U5 has its 5 pin connected to the emitter of the transistor Q1, said dual JK flip-flop CD4027-U5 has its 10, 11 and 16 pins connected, and said dual JK flip-flop CD4027-U5 has its 10 + V5 pin connected.

9. The control circuit of a constant temperature liquid medicine injection heating device according to claim 8, wherein the second relay control circuit (12) comprises resistors R9-R11, a light emitting diode VD4, a relay RL2, a diode D2 and a photoelectric coupler OPTOISO1-U3, an anode series resistor R9 of the photoelectric coupler OPTOISO1-U3, the other end of the resistor R9 is connected with a 14-pin of a double JK trigger CD4027-U5, a cathode of the photoelectric coupler OPTOISO1-U3 is grounded, an emitter of the photoelectric coupler OPTOISO1-U3 is grounded, two ends of the relay RL2 are connected with the diode D2 in parallel, one end of the parallel connection is connected with +12V, the other end of the parallel connection is connected with a collector of the photoelectric coupler OPTOISO1-U3, two ends of the diode D2 is connected with the resistor R10 and the light emitting diode VD4 in parallel, and the relay RL2 is connected with the COM +12V, the NO end of the relay RL2 is connected with a resistor R11 in series.

10. The control circuit of a constant-temperature liquid medicine injection heating device according to claim 9, wherein the UV LED module (13) comprises light emitting diodes VD 5-VD 22, the light emitting diodes VD5, the light emitting diodes VD11 and the light emitting diodes VD17 are connected in series to form a unit group, the light emitting diodes VD6, the light emitting diodes VD12 and the light emitting diodes VD18 are connected in series to form a unit group, the light emitting diodes VD10, the light emitting diodes VD13 and the light emitting diodes VD19 are connected in series to form a unit group, the light emitting diodes VD7, the light emitting diodes VD14 and the light emitting diodes VD20 are connected in series to form a unit group, the light emitting diodes VD8, the light emitting diodes VD15 and the light emitting diodes VD21 are connected in series to form a unit group, the light emitting diodes VD9, the light emitting diodes VD16 and the light emitting diodes VD22 are connected in series to form a unit group, and the UV LED module (13) comprises 6 unit groups in total, the device is composed of 6 unit groups in parallel connection, the cathode after parallel connection is grounded, and the anode after parallel connection is connected with the other end of the resistor R11.

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