CN112834791A

CN112834791A - Steam ablation apparatus

Info

Publication number: CN112834791A
Application number: CN202011637744.6A
Authority: CN
Inventors: 汤碧翔; 徐宏; 马永杰
Original assignee: Hangzhou Kunbo Biotechnology Co Ltd
Current assignee: Hangzhou Kunbo Biotechnology Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-25
Anticipated expiration: 2040-12-31
Also published as: CN112834791B

Abstract

The present invention provides a steam ablation device comprising: the injection device comprises a handle, a heating part, a power supply module, an injection part and a first processing circuit; the handle is internally provided with a cavity and a nozzle connected to the cavity, the heating part is arranged in the cavity, the power supply module is electrically connected to the heating part to supply power to the heating part so as to heat the heating part, and the injection part is connected to the cavity to inject water into the cavity; the first processing circuit comprises a first control module, a voltage comparison module, a temperature comparison module and a protection logic processing module, wherein the voltage comparison module and the temperature comparison module are electrically connected to the first side of the protection logic processing module, and the first side of the protection logic processing module is electrically connected to the first control module.

Description

Steam ablation apparatus

Technical Field

The invention relates to the field of medical instruments, in particular to steam ablation equipment.

Background

Steam ablation is a new technology for forming high-temperature water vapor and then applying the high-temperature water vapor to a target part in a patient body, and can be used for local tissue inflammatory reaction, injury repair and the like. Steam ablation may be applied to the bronchi, for example, but is not limited thereto.

Among the steam ablation equipment, the heater block can be located and hold the chamber, and the power can heat the heater block, then heats, evaporates the water of sending into the chamber, forms steam, however, the security in the course of the work is difficult to obtain the guarantee, for example when the heater block temperature is too high, voltage is too high, the electric current is too high, when the working signal (for example watchdog signal) goes wrong, all probably lead to the potential safety hazard.

Disclosure of Invention

The invention provides steam ablation equipment to solve the problem of potential safety hazard.

The present invention provides a steam ablation device comprising: the injection device comprises a handle, a heating part, a power supply module, an injection part and a first processing circuit;

the handle is internally provided with a cavity and a nozzle connected to the cavity, the heating part is arranged in the cavity, the power supply module is electrically connected to the heating part to supply power to the heating part so as to heat the heating part, and the injection part is connected to the cavity to inject water into the cavity;

the first processing circuit comprises a first control module, a voltage comparison module, a temperature comparison module and a protection logic processing module, wherein the voltage comparison module and the temperature comparison module are electrically connected to the first side of the protection logic processing module, and the second side of the protection logic processing module is electrically connected to the first control module;

the voltage comparison module is used for determining the output voltage information of the power supply module and sending a first protection trigger signal to the protection logic processing module according to the output voltage information of the power supply module and the threshold voltage; the first protection trigger signal characterizes that the output voltage information is always higher than the threshold voltage in a first time period;

the temperature comparison module is used for determining component temperature information of the heating component and sending a second protection trigger signal to the protection logic processing module according to the component temperature information of the heating component and a threshold temperature; the second protection trigger signal is indicative of the component temperature information being above the threshold temperature;

the protection logic processing module is used for: triggering at least one specified protection action in response to the first protection trigger signal or the second protection trigger signal.

According to the invention, dangerous situations that the component temperature information is higher than the threshold temperature, the output voltage information is higher than the threshold voltage and is kept for the first time length and the like can be monitored through the voltage comparison module and the temperature comparison module, so that the protection action is triggered through the protection logic processing module in time, and the safety is effectively guaranteed.

Meanwhile, in the invention, because the cavity is arranged in the handle, water can be heated by the heating part after being injected into the cavity through the injection part quantitatively, and is evaporated rapidly to form steam, so that the steam is sprayed out from the nozzle.

Optionally, the voltage comparison module includes a voltage comparator and a timer;

the first input end of the voltage comparator is connected with a voltage measurement signal used for representing the output voltage information, the second input end of the voltage comparator is connected with a reference voltage corresponding to the voltage threshold, the output end of the voltage comparator is electrically connected with the input end of the timer, and the output end of the timer is electrically connected with the first side of the protection logic processing module.

In the above alternative, whether a dangerous situation occurs or not can be automatically judged based on the comparison of the voltages and the timing, so that a basis is provided for the automatic triggering of the protection action.

Optionally, the first processing circuit further includes: a voltage measurement module;

the voltage measuring module is electrically connected with the output end of the power supply module and is used for measuring the output voltage of the power supply module and generating the voltage measuring signal;

the voltage measuring module is electrically connected with the voltage comparing module and is used for sending the voltage measuring signal to the voltage comparing module.

In the above alternative schemes, automatic measurement and feedback of voltage can be realized, and an accurate basis is provided for execution of protection actions.

Optionally, the voltage measuring module includes: the first differential amplification unit, the first voltage sensor and the first differential-to-single-ended conversion unit;

a first input end and a second input end of the first differential amplification unit are respectively and electrically connected with an anode of the output side of the power supply module and a cathode of the output side of the power supply module, and an output end of the first differential amplification unit is electrically connected with an input end of the first voltage sensor;

the first differential amplification unit is used for carrying out differential processing on the voltages at two ends of the output side of the power supply module and amplifying a differential result to obtain a single-ended first amplification signal; transmitting the first amplified signal to an input side of the first voltage sensor;

a first output end of the first voltage sensor is electrically connected with a first input end of the first differential-to-single-ended unit, and a second output end of the first voltage sensor is electrically connected with a second input end of the first differential-to-single-ended unit;

the first voltage sensor is configured to convert the first amplified signal into a first differential signal, and transmit the first differential signal to the first differential-to-single-ended unit;

the output side of the first differential-to-single-ended unit is electrically connected with the voltage comparison module;

the first differential-to-single-ended unit is configured to convert the first differential signal into a single-ended voltage measurement signal, and send the single-ended voltage measurement signal to the voltage comparison module.

In the scheme, the static working point is effectively stabilized through the symmetry and negative feedback effect of the differential amplification unit on the circuit parameters, and meanwhile, the amplified differential mode signal can be used for inhibiting the common mode signal.

Optionally, the temperature comparison module includes a temperature comparator;

the first input end of the temperature comparator is connected with a temperature measurement signal used for representing the temperature information of the component, the second input end of the temperature comparator is connected with a reference voltage corresponding to the temperature threshold, and the output end of the temperature comparator is connected with the first side of the protection logic processing module.

In the above alternative, whether a dangerous situation occurs or not can be automatically judged based on the comparison of the temperatures, and a basis is provided for the automatic triggering of the protection action.

Optionally, the steam ablation device further includes a second processing circuit and a temperature sensor disposed on the handle, and the second processing circuit includes: the temperature measuring module and the second control module; the first control module and the second control module are configured to be capable of communicating;

the temperature sensor is used for detecting the temperature information of the component and sending a temperature acquisition signal representing the temperature information of the component to the temperature measurement module;

the temperature measurement module is electrically connected with the temperature sensor and the second control module and used for sending the temperature measurement signal to the second control module according to the temperature acquisition signal;

the temperature comparison module is configured to enable acquisition of the temperature measurement signal directly or indirectly from the second control module.

In the alternative scheme, the temperature measuring signal can be collected in the handle and fed back to the temperature comparison module through the second control module, so that the automatic temperature measurement and feedback can be realized, and an accurate basis is provided for the execution of the protection action.

Optionally, the temperature measuring module includes: the device comprises a preamplification unit, a filtering unit and a signal amplification unit;

the first input end of the pre-amplification unit is electrically connected with the first pole of the temperature sensor, the second input end of the pre-amplification unit is electrically connected with the second pole of the temperature sensor, and the output end of the pre-amplification unit is electrically connected with the second control module;

the first end of the filter unit is electrically connected with the first pole of the temperature sensor and the first input end of the pre-amplification unit, and the second end of the filter unit is electrically connected with the second pole of the temperature sensor and the second input end of the pre-amplification unit;

the input end of the signal amplification unit is electrically connected with the output end of the pre-amplification unit, and the output end of the signal amplification unit is electrically connected with the second control module.

In the above alternative, the amplification of the signal amplification unit and the pre-amplification unit and the filtering of the filtering unit can effectively ensure that the temperature represented by the signal can be accurately transmitted, and the influence of interference and attenuation on signal transmission in the transmission process is reduced.

Optionally, the first processing circuit further includes: a watchdog monitoring module; the watchdog monitoring module is electrically connected with an output end of the first control module for outputting a watchdog signal and a first side of the protection logic processing module;

the watchdog monitoring module is used for:

if the watchdog signal is always at the target level within the second duration, sending a third protection trigger signal to the protection logic processing module;

the protection logic processing module is used for:

triggering the first control module to perform the at least one specified protection action in response to the third protection trigger signal.

In the above alternatives, when the software in the first control module works normally, the signal of the watchdog software is usually a signal with a PWM waveform, and when an abnormality occurs, the signal may change into a signal (for example, a low-level signal) that keeps outputting a target level, so that the abnormality of the software in the first control module can be found in time by monitoring the target level signal by the watchdog monitoring module, and the feedback is performed in time to trigger a specific protection action, thereby further ensuring the security.

Optionally, the steam ablation device further includes a switch module, and the switch module is disposed between the power supply module and the heating component; the controlled end of the switch module, the controlled end of the power module and the controlled end of the injection part are electrically connected with the second side of the first control module.

The at least one specified protection action comprises at least one of:

a first protection action of controlling the switch-off of the switch module;

a second protection operation for controlling the injection part to stop working;

and controlling the power supply module to stop the third protection action of the output voltage.

In the above alternative, a plurality of protection actions are defined, and the security of the device can be effectively guaranteed through the execution of the protection actions. Meanwhile, whether heating is performed or not can be controlled through the control of the switch module.

Optionally, the switch module includes a first transistor, a second transistor, and a driving unit;

a first end of the first transistor is electrically connected with the anode of the output side of the power supply module, a second end of the first transistor is electrically connected with the first end of the heating component, a first end of the second transistor is electrically connected with the cathode of the output side of the power supply module, and a second end of the second transistor is electrically connected with the second end of the heating component;

the driving unit is respectively and electrically connected with the protection logic processing module, the control end of the first transistor and the control end of the second transistor, and is used for responding to the switch control signal output by the protection logic processing module and controlling the first transistor and the second transistor to be simultaneously switched on or switched off.

In the above alternative, the control of whether to heat or not can be realized by the simultaneous control of the transistors (e.g., field effect transistors), and at the same time, a certain degree of isolation can be formed between the transistors and the controller by the driving unit.

Optionally, the driving unit includes a third transistor, an optical coupler isolator, and a transistor driver;

the control end of the third transistor is electrically connected with the protection logic processing module, the first end of the third transistor is electrically connected with the second input end of the optical coupling isolator, and the second end of the third transistor is electrically connected with the ground;

the output end of the optical coupling isolator is electrically connected with the input end of the transistor driver;

the first output end of the transistor driver is electrically connected with the control end of the first transistor, the second output end of the transistor driver is electrically connected with the second end of the first transistor, the third output end of the transistor driver is electrically connected with the control end of the second transistor, and the fourth output end of the transistor driver is electrically connected with the second end of the second transistor.

Because the voltage difference between the first control module and the protection logic processing module is larger than that of the power supply module and the first control module and the protection logic processing module are in different power supply domains, isolation is needed.

Optionally, the protection logic processing module is specifically configured to:

when any one protection trigger signal and a first heating enabling signal are acquired, triggering the first control module to execute the third protection action, wherein the first heating enabling signal represents the controlled output voltage of the power supply module;

when any one protection trigger signal and a second heating enabling signal are obtained, the first control module is triggered to execute the first protection action, and the second heating enabling signal represents that a switch module between the power supply module and the heating part needs to be controlled to be conducted;

and when any one protection trigger signal and an injection enabling signal are acquired, triggering the first control module to execute the third protection action, wherein the injection enabling signal represents that the injection part needs to be controlled to work.

Optionally, the protection logic processing module includes an or gate, a first and gate, a second and gate, and a third and gate; the input side of the OR gate is used for accessing each protection trigger signal, and the output end of the OR gate is respectively connected with the input ends of the first AND gate, the second AND gate and the third AND gate; the input end of the first AND gate is further connected with the first heating enabling signal, the input end of the second AND gate is further connected with the second heating enabling signal, the input end of the third AND gate is further connected with the injection enabling signal, and the output ends of the first AND gate, the second AND gate and the third AND gate are respectively connected with the power supply module, the switch module and the injection part.

In the above scheme, the combination of logic processing devices such as and gates and or gates can satisfy the following requirements: when any one of the protection trigger signals is sent out and the circuit part (such as a power supply module, a switch module and an injection part) corresponding to the protection action is enabled to operate, the protection operation can be carried out aiming at the protection action.

Optionally, one controlled end of the power module is electrically connected to the first control module through the voltage regulating module.

In the above alternative, the adjustment of the output voltage of the power supply module can be realized by the voltage adjusting module.

Optionally, the first processing circuit further includes a current measurement module;

the current measuring module is electrically connected with the output side of the power supply module so as to measure the component current information output to the heating component by the power supply module;

the current measuring module is also electrically connected with the first control module and feeds back a current measuring signal representing the component current information to the first control module.

In the above scheme, through the current measurement module, the current information of the component can be accurately collected and fed back to the first control module, so as to provide a basis for further control and/or protection actions.

Optionally, the current measurement module includes a conversion unit, a second differential amplification unit, a second voltage sensor, and a second differential-to-single-ended unit,

the input end of the conversion unit is electrically connected with the output side of the power supply module, and the output end of the conversion unit is electrically connected with the second differential amplification unit and is used for converting the current flowing through the heating component into voltage and outputting the voltage representing the current information of the component;

the first input end of the second differential amplification unit and the second input end of the second differential amplification unit are respectively electrically connected with the first output end of the conversion unit and the second output end of the conversion unit, and the output end of the second differential amplification unit is electrically connected with the input end of the second voltage sensor;

the second differential amplification unit is used for carrying out differential processing on two ends of the output side of the conversion unit and amplifying a differential result to obtain a single-ended second amplification signal; transmitting the second amplified signal to an input side of the second voltage sensor;

a first output end of the second voltage sensor is electrically connected to a first input end of the second differential-to-single-ended unit, and a second output end of the second voltage sensor is electrically connected to a second input end of the second differential-to-single-ended unit;

the second voltage sensor is configured to convert the second amplified signal into a second differential signal, and transmit the second differential signal to the second differential-to-single-ended unit;

the second differential-to-single-ended unit is configured to convert the second differential signal into a single-ended current measurement signal, and send the single-ended current measurement signal to the first control module.

In the scheme, automatic acquisition and feedback of current information are realized, meanwhile, the static working point is effectively stabilized through the symmetry and negative feedback effect of the differential amplification unit on circuit parameters, and meanwhile, the amplified differential mode signal can be used for inhibiting the common mode signal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a first schematic view of a steam ablation device in accordance with an embodiment of the present invention;

FIG. 2 is a second schematic view of the configuration of a steam ablation device in accordance with an embodiment of the present invention;

FIG. 3 is a third schematic view of a steam ablation device in accordance with an embodiment of the present invention;

FIG. 4 is a first diagram illustrating a first processing circuit according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram illustrating a partial structure of a first processing circuit according to an embodiment of the invention;

FIG. 6 is a schematic diagram of the temperature measurement module according to an embodiment of the present invention;

FIG. 7 is a schematic circuit diagram of a temperature measurement module according to an embodiment of the invention;

FIG. 8 is a schematic diagram of the voltage measurement module according to an embodiment of the present invention;

FIG. 9 is a schematic circuit diagram of a voltage measurement module according to an embodiment of the invention;

FIG. 10 is a schematic diagram of the current measurement module according to an embodiment of the present invention;

FIG. 11 is a circuit diagram of a current measurement module according to an embodiment of the invention;

FIG. 12 is a schematic diagram of the construction of a switch module in accordance with an embodiment of the present invention;

FIG. 13 is a circuit schematic of a switch module according to an embodiment of the invention;

FIG. 14 is a schematic diagram of the connection of a voltage regulation module according to an embodiment of the present invention;

FIG. 15 is a schematic circuit diagram of a voltage regulation module according to an embodiment of the present invention;

FIG. 16 is a schematic view of a drive module for an injection section motor in accordance with an embodiment of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1, in an embodiment of the present invention, a steam ablation apparatus may include: handle 2, heating element 22, power module 12, injection part 14, and first processing circuit 11.

The handle 2, which can be understood as a structure suitable for operation to perform steam injection, may have a cavity 21 and a nozzle 23 connected to the cavity 21, and a valve and a pipeline for controlling the on/off of steam may be provided between the cavity 21 and the nozzle 23.

The heating component 22 is disposed in the cavity 21, and may be a component capable of heating water entering the cavity to generate steam, for example, a heating coil may be included, a heating rod may also be included, and any component that can be suitable for heating may be used as the heating component according to the embodiment of the present invention.

Wherein, the power module 12 is electrically connected to the heating component 22 to supply power to the heating component 22, so that the heating component 22 generates heat.

The injection part 14 is connected (may be connected, for example, by a water pipe) to the cavity 22 to inject water into the cavity 22; the injections effected therein may be effected electrically, without excluding manual means. In one embodiment, the injection portion may include, for example, an injection body having an injection cavity, the injection cavity being provided with an injection moving member, and the injection moving member may be connected to an injection motor through a transmission member so as to move along an inner wall of the injection cavity under the driving of the injection motor, so as to inject water in the injection cavity into the inner cavity 22.

The power module 12 may be any module capable of providing power for heating the heating component 22, and further, it may also provide power for the injection part 14 (e.g., an injection motor thereof), and furthermore, the power module 12 may be configured to adjust specific electrical parameters (e.g., voltage, current, power, etc.) of the power output to the heating component and/or the injection part under the control of the control module (e.g., the first control module 11).

A switch module 13 may be disposed between the power module 12 and the heating component 22, and a controlled end of the switch module may be directly or indirectly electrically connected to the first control module 111 (e.g., directly electrically connected to the first control module 111, or electrically connected to the first control module 111 via the protection logic processing module 114). Furthermore, whether heating is performed or not can be controlled by controlling the switch module. The switch module 13 may be any device or combination of devices that can be controlled to be turned on and off.

In the illustrated embodiment, the power supply module 12, the switch module 13, the first processing circuit 11, the injection unit 14, and the like may be provided in the case 1, and in other examples, a means of providing them in other structures or in different structures is not excluded. Meanwhile, the embodiment of the present invention does not exclude the possibility that the switch module 13 and the like are provided in the handle 2.

In the above scheme, the cavity is arranged in the handle, and water is quantitatively injected into the cavity through the injection part and then can be heated by the heating part to be quickly evaporated to form steam, so that the steam is sprayed out from the nozzle.

In the embodiment using the case 1 and the handle 2, the water outlet of the injection part 14 may be connected to the corresponding interface of the handle 2 through a water pipe and further connected to the housing 21, and the circuit structure such as the power module 12 may be connected to the handle through an electric wire, for example, the power module 12 may be connected to one end of the electric wire through the switch module 13 and the corresponding interface, and the other end of the electric wire is connected to the interface on the handle 2 and further connected to the heating part.

In a scheme that can implement the protection action, the first processing circuit 11 may include a first control module 11, a voltage comparison module 115, a temperature comparison module 116, and a protection logic processing module 114, where the voltage comparison module 115 and the temperature comparison module 116 are both electrically connected to a first side of the protection logic processing module 114, and the first side of the protection logic processing module 114 is electrically connected to the first control module 111.

The voltage comparing module 115 is configured to determine output voltage information of the power module, and send a first protection trigger signal to the protection logic processing module 114 according to the output voltage information of the power module 12 and a threshold voltage.

The determination of the output voltage information by the voltage comparison module 115 may be implemented by acquiring a voltage measurement signal representing the output voltage information from other circuits (e.g., the voltage measurement module 112 shown later).

The first protection trigger signal represents that the output voltage information is higher than the threshold voltage all the time in the first time length, and then the first protection trigger signal can embody the dangerous situation that the voltage is kept in a higher range in the first time length, and the timely feedback of the dangerous situation can be realized through the feedback of the first protection trigger signal.

The temperature comparing module 116 is configured to determine component temperature information of the heating component 22, and send a second protection trigger signal to the protection logic processing module 114 according to the component temperature information of the heating component 22 and a threshold temperature;

the determination of the component temperature information by the temperature comparison module 116 may be implemented by acquiring a temperature measurement signal representing the component temperature information from other circuits (for example, a temperature measurement module 251 shown later).

The second protection trigger signal is indicative of the component temperature information being above the threshold temperature; furthermore, the second protection trigger signal can reflect the dangerous situation that the temperature is kept in a higher range, and the timely feedback of the dangerous situation can be realized through the feedback of the second protection trigger signal.

The protection logic processing module 114 is configured to: triggering the first control module 111 to perform at least one specified protection action in response to the first protection trigger signal or the second protection trigger signal.

In the above scheme, through the voltage comparison module and the temperature comparison module, dangerous situations that the component temperature information is higher than the threshold temperature, the output voltage information is higher than the threshold voltage and the first time length is kept and the like can be monitored, and then the protection action is triggered through the protection logic processing module in time, so that the safety is effectively guaranteed.

In one embodiment, referring to fig. 3, the first processing circuit 11 further includes: a watchdog monitoring module 117; the watchdog monitoring module 117 is electrically connected to an output end of the first control module 111 for outputting a watchdog signal, and a first side of the protection logic processing module 114;

the watchdog monitoring module 117 is configured to:

the protection logic processing module 114 is configured to:

upon receiving the third protection trigger signal, triggering the first control module 111 to perform the at least one specified protection action.

In the above alternative, when software of the control module normally works, the watchdog signal is usually a signal of a PWM waveform, and when an abnormality occurs, the signal may change into a signal (for example, a signal of a low level) that keeps an output target level, so that the abnormality of the watchdog system can be found in time and fed back in time by monitoring the target level signal by the watchdog monitoring module, and a specified protection action is triggered, thereby further ensuring the security.

Therefore, in the scheme of simultaneously adopting the voltage comparison module, the temperature comparison module and the watchdog monitoring module, the protection action can be triggered in time when any one of the voltage, the temperature and the watchdog signal is abnormal, and the safety is comprehensively guaranteed.

In one embodiment, referring to fig. 4 and 5, the voltage comparison module 115 includes a voltage comparator 1151 and a first timer 1152.

A voltage measurement signal (for example, the voltage measurement signal output by the voltage measurement module 112) for representing the output voltage information is input to a first input terminal of the voltage comparator 1151, a reference voltage (i.e., a first reference voltage) corresponding to the voltage threshold is input to a second input terminal of the voltage comparator 1151, an output terminal of the voltage comparator is electrically connected to an input terminal of the first timer 1152, and an output terminal of the first timer 1152 is electrically connected to a first side of the protection logic processing module 114.

In one example, the collected power voltage (i.e., the output voltage of the power module) is connected to the voltage comparator 1151, compared with a threshold voltage (e.g., 19V), and then timed by the first timer 1152, when the collected voltage exceeds the threshold voltage (e.g., 19V), the voltage comparator 1151 may output a low level, and after the duration time exceeds a first duration (e.g., 5 seconds), the error status is valid, and a protection action needs to be implemented.

In a further scheme, referring to fig. 5, the voltage comparison module 115 may further include an input resistor R602, a voltage dividing resistor R601, a voltage dividing resistor R613, and a pull-up resistor R603, wherein a voltage measurement signal may be input to a non-inverting input terminal of the voltage comparator 1151 through the input resistor R602, one end of the voltage dividing resistor R601 may be connected to a voltage source (e.g., +3V voltage source), the other end of the voltage dividing resistor R601 may be grounded through the voltage dividing resistor R613, an inverting input terminal of the voltage comparator 1151 may be connected between the two voltage dividing resistors to obtain a required reference voltage, and an output terminal of the voltage comparator 1151 may be connected to the voltage source through the pull-up resistor R603.

In a further aspect, the first timer 1152 may employ a timer chip U61 (which may also be understood as a delay chip), and the DIV terminal of the timer chip U61 may be connected between two voltage dividing resistors (voltage dividing resistor R604 and voltage dividing resistor R605), the voltage dividing resistor R604 and the voltage dividing resistor R605 may be connected between a voltage source and ground, and the SET terminal of the timer chip U61 may be grounded via the resistor R606.

In one embodiment, referring to fig. 4 and 5, the temperature comparison module 115 includes a temperature comparator 1151;

a first input end of the temperature comparator 1161 is connected to a temperature measurement signal for representing the temperature information of the component, a second input end of the temperature comparator 1161 is connected to a reference voltage (i.e., a second reference voltage) corresponding to the temperature threshold, and an output end of the temperature comparator 1161 is connected to a first side of the protection logic processing module 114.

In one example, the related device (e.g., the temperature measurement module 251) converts the temperature signal into a voltage signal, and then connects to the temperature comparator 1161 (also a voltage comparator), wherein a reference voltage of 1.9V may be set corresponding to a temperature threshold of 180 ℃, and when the temperature exceeds 180 ℃, the comparator outputs a low level, which indicates that an error condition is valid, and a protection action needs to be implemented.

In a further scheme, referring to fig. 5, the temperature comparison module 115 further includes a voltage dividing resistor R607, a voltage dividing resistor R608 and a pull-down resistor R609, the temperature measurement signal may be input to the positive input terminal of the voltage comparator 1161, one end of the voltage dividing resistor R607 may be connected to a voltage source (for example, a +3V voltage source), the other end may be grounded via the voltage dividing resistor R608, the positive input terminal of the temperature comparator 1161 may be connected between the two voltage dividing resistors to obtain a required reference voltage, and the output terminal of the temperature comparator 1161 may be connected to ground via the pull-down resistor R609.

In one embodiment, referring to fig. 4 and 5, the watchdog monitoring module 117 may include a timer chip U62, an input terminal of which is connected to the watchdog signal, and an output terminal of which is connected to the protection logic processing module 114, and meanwhile, a DIV terminal of the timer chip U62 may be connected between two voltage dividing resistors (voltage dividing resistor R610 and voltage dividing resistor R611), the voltage dividing resistor R610 and the voltage dividing resistor R611 may be connected between a voltage source and ground, a SET terminal of the timer chip U62 may be grounded via a resistor R612, and a power supply terminal of the timer chip U62 may also be connected to the voltage source and the capacitor C61.

For further example, in the normal operation process of the software of the first control module, the WATCHDOG signal (i.e., WATCHDOG signal) may continuously output the PWM wave of 200ms, when the software of the first control module is abnormal or goes wrong, the WATCHDOG signal does not output the PWM waveform any more but outputs the low level, the timer chip U62 may monitor the change of the WATCHDOG pin signal in the first control module, and at this time, it indicates that the error state is valid, and the protection action needs to be implemented.

In one embodiment, the at least one specified protection action includes at least one of:

a first protection action of controlling the switch-off of the switch module;

In the above alternative, a plurality of protection actions are defined, and the security of the device can be effectively guaranteed through the execution of the protection actions.

In one embodiment, referring to fig. 5, the protection logic processing module 114 is specifically configured to:

when any one of protection trigger signals (for example, any one of a first protection trigger signal, a second protection trigger signal, and a third protection trigger signal) and a first heating enable signal are acquired, triggering the first control module 111 to execute the third protection action, where the first heating enable signal represents an output voltage that the power supply module needs to be controlled;

when any one protection trigger signal (for example, any one of a first protection trigger signal, a second protection trigger signal, and a third protection trigger signal) and a second heating enable signal are acquired, triggering the first control module 111 to execute the first protection action, where the second heating enable signal indicates that a switch module between the power supply module and the heating component is turned on;

when any one protection trigger signal (such as any one of a first protection trigger signal, a second protection trigger signal and a third protection trigger signal) and an injection enable signal are acquired, the first control module is triggered to execute the second protection action, and the injection enable signal represents that the injection part needs to be controlled to work, and can also be understood as that an injection motor in the injection part needs to be controlled to work (such as running).

The first heating enable signal, the second heating enable signal, and the injection enable signal may be sent by the first control module, or may be fed back by the switch module, the power module, the injection unit, or a circuit related thereto, and the signals obtained from any place may not depart from the scope of the embodiments of the present invention.

In order to implement the above logic functions, in a specific example, the protection logic processing module 114 may include an or gate U63, a first and gate U64, a second and gate U65, and a third and gate U66.

The input side of the or gate U63 is used for accessing protection trigger signals (i.e. accessing a first protection trigger signal, a second protection trigger signal and a third protection trigger signal, respectively), and the output end of the or gate U63 is connected to the input ends of the first and gate U64, the second and gate U65 and the third and gate U66, respectively; the input terminal of the first and gate U64 is further connected to the first heating ENABLE signal, for example, the signal when the heat _ ENABLE _1 signal shown in fig. 5 is at a high level (or a low level), the input terminal of the second and gate U65 is further connected to the second heating ENABLE signal, for example, the signal when the heat _ ENABLE _2 signal shown in fig. 5 is at a high level (or a low level), the input terminal of the third and gate U66 is further connected to the injection ENABLE signal, for example, the signal when the STBY signal shown in fig. 5 is at a high level (or a low level), and the output terminals of the first and gate U64, the second and gate U65 and the third and gate U66 are respectively connected to the power module 12, the switch module 13 and the injection unit 14, so as to control the power module 12, the switch module 13 and the injection unit 14.

A resistor R614 may be further disposed between the first and gate U64 and the power module 12, so as to satisfy the voltage required by the power module 12.

In the implementation manner of the embodiment of the present invention, the voltage measurement module and the temperature measurement module can obtain the required voltage measurement signal and current measurement signal, the measured signals can be fed back to the corresponding voltage comparison module and temperature comparison module, and also can be fed back to the first control module, the voltage measurement module can be disposed in the box body 1, the temperature measurement module can be disposed in the handle 2, but other manners for disposing the circuit modules are not excluded.

Referring to fig. 3, the steam ablation apparatus further includes a second processing circuit 25 and a temperature sensor 24, where the second processing circuit 25 includes: a temperature measurement module 251 and a second control module 252.

The first control module 111 and the second control module 252 are configured to be able to communicate; for example, the first control module 111 and the second control module 252 may communicate with each other through a communication line disposed on an electric wire, wherein the communication line between the first control module 111 and the second control module 252 and the power line between the switch module 13 and the heating component 22 may be integrated on the same electric wire or disposed on different electric wires, and meanwhile, the embodiment of the present invention does not exclude a means for implementing the communication between the first control module 111 and the second control module 252 by using a wireless communication method. In the case of communication between the first control module 111 and the second control module 252, the second control module 252 may acquire information such as component temperature information from the first control module 111.

The temperature sensor 24 is configured to detect the component temperature information and send a temperature acquisition signal representing the component temperature information to the temperature measurement module;

the temperature measuring module 251 is electrically connected to the temperature sensor 24, and is configured to feed back component temperature information to the second control module 252 according to the temperature collecting signal;

the temperature comparison module 116 is configured to be able to obtain the temperature measurement signal directly or indirectly from the second control module, for example: the temperature comparison module 116 may be connected to the second control module via a communication line to obtain the temperature measurement signal, and the temperature comparison module 116 may also be in communication with the second control module via the first control module to obtain the temperature measurement signal.

In a further embodiment, referring to fig. 6, the temperature measuring module 251 includes: a pre-amplification unit 2511, a filtering unit 2513, and a signal amplification unit 2512;

a first input end of the pre-amplification unit 2511 is electrically connected to the first pole of the temperature sensor 24, a second input end of the pre-amplification unit 2511 is electrically connected to the second pole of the temperature sensor 24, and an output end of the pre-amplification unit 2511 is electrically connected to the second control module 252; in addition, the detection terminal of the pre-amplification unit may be electrically connected to the output terminal of the pre-amplification unit.

A first end of the filter unit 2513 is electrically connected to a first pole of the temperature sensor 24 and a first input end of the pre-amplifier unit 2511, and a second end of the filter unit 2513 is electrically connected to a second pole of the temperature sensor 24 and a second input end of the pre-amplifier unit 2511;

an input end of the signal amplifying unit 2512 is electrically connected to an output end of the pre-amplifying unit 2511, and an output end of the signal amplifying unit 2512 is electrically connected to the second control module 251.

In a further embodiment, referring to fig. 7, in the case that the temperature sensor is a thermocouple, the pre-amplification unit 2511 may employ a thermocouple amplification chip U51, which may be a dedicated thermocouple amplification chip with junction temperature compensation, specifically, the temperature-voltage variation output by the chip may be Vout — Temp × 5mv/C, where Temp represents temperature, and further, the output voltage variation range may be 0 to 300 ℃.

The filter unit 2513 includes a first filter resistor R53, a second filter resistor R54, a first filter capacitor C52, and a second filter capacitor C51, which may form a low pass filter.

A first end of the first filter resistor R53 is electrically connected to a first pole of the temperature sensor, and a second end of the first filter resistor R53 is electrically connected to a first input end of the pre-amplification unit 2511;

a first end of the second filter resistor R54 is electrically connected to the second pole of the temperature sensor 24, and a second end of the second filter resistor R54 is electrically connected to the second input end of the pre-amplification unit 2511;

a first end of the first filter capacitor C52 is electrically connected to a second end of the first filter resistor R53, and a second end of the first filter capacitor C52 is electrically connected to ground;

a first terminal of the second filter capacitor C51 is electrically connected to the second terminal of the second filter resistor R54, and a second terminal of the second filter capacitor C51 is electrically connected to ground.

In a further scheme, the signal amplifying unit 2512 comprises an operational amplifier N51, a first input terminal of the operational amplifier N51 is electrically connected to the output terminal of the pre-amplifying unit 2511, a second input terminal of the operational amplifier N51 is electrically connected to ground, and an output terminal of the operational amplifier N51 is electrically connected to the second control module 251. The first input terminal of the operational amplifier N51 may be the non-inverting input terminal thereof, and the second input terminal thereof may be the inverting input terminal thereof.

In a further scheme, the signal amplifying unit further comprises a pull-down resistor R52 and a feedback resistor R51;

a first terminal of the pull-down resistor R52 is electrically connected to the second input terminal of the operational amplifier N51, a second terminal of the pull-down resistor R52 is electrically connected to ground,

the feedback resistor is connected between the second input terminal of the operational amplifier N51 and the output terminal of the operational amplifier N51.

The operational amplifier N51 is specifically a proportional operational amplifier, after amplification, the amplification factor may reach 1.59, for example, and the amplified temperature measurement signal is input to a DAC port of the second control module (e.g., MCU) to read data, where Vout is 1.59 Temp 5mv/C, which is the temperature-voltage conversion relationship in the whole process.

Referring to fig. 3, the first processing circuit 11 further includes: a voltage measurement module 112;

the voltage measuring module 112 is electrically connected to the output end of the power module 12, and is configured to measure the output voltage of the power module and generate the voltage measuring signal;

the voltage measuring module is electrically connected to the voltage comparing module 115, and is configured to send the voltage measuring signal to the voltage comparing module 115.

Further, referring to fig. 8, the voltage measuring module 112 may include: the first differential amplifying unit 1121, the first voltage sensor 1122 and the first differential-to-single-ended unit 1123;

a first input end and a second input end of the first differential amplification unit 1121 are electrically connected to the positive electrode of the output side of the power module 12 and the negative electrode of the output side of the power module 12, respectively, and an output end of the first differential amplification unit 1121 is electrically connected to an input end of the first voltage sensor 1122;

the first differential amplifying unit 1121 is configured to perform differential processing on voltages at two ends of the output side of the power module 12, and amplify a differential result to obtain a single-ended first amplified signal; transmitting the first amplified signal to an input side of the first voltage sensor 1122;

a first output end of the first voltage sensor 1122 is electrically connected to a first input end of the first differential-to-single-ended unit 1123, and a second output end of the first voltage sensor 1122 is electrically connected to a second input end of the first differential-to-single-ended unit 1123;

the first voltage sensor 1122 is configured to convert the first amplified signal into a first differential signal and transmit the first differential signal to the first differential-to-single-ended unit 1123;

the output side of the first differential-to-single-ended unit 1123 is electrically connected to the voltage comparison module 115;

the first differential-to-single-ended unit 1123 is configured to convert the first differential signal into a single-ended voltage measurement signal, and send the single-ended voltage measurement signal to the voltage comparison module 115.

In a further scheme, referring to fig. 9, the first differential amplifying unit 1121 includes a first operational amplifier N21, a first input terminal of the first operational amplifier N21 is electrically connected to the positive electrode of the output side of the power module 12, a second input terminal of the first operational amplifier N21 is electrically connected to the negative electrode of the output side of the power module 12, and an output terminal of the first operational amplifier N21 is electrically connected to the input terminal of the first voltage sensor 1122.

The first differential amplifying unit 1121 further includes a first differential resistor R22, a second differential resistor R23, and the first differential resistor R22 is electrically connected between the positive electrode of the output terminal of the power module and a first input terminal (e.g., a non-inverting input terminal) of the first operational amplifier N21; the second differential resistor R23 is electrically connected between the negative terminal of the output terminal of the power supply module and the second input terminal (e.g., inverting input terminal) of the first operational amplifier N21.

The differential amplifying unit 112 further includes a third differential resistor R28, and the third differential resistor R28 is electrically connected between the second input terminal of the first operational amplifier N21 and the output terminal of the first operational amplifier N21.

In addition, the first input terminal of the first operational amplifier N21 may also be connected to ground via a resistor R21.

Further, the first differential-to-single-ended unit 1123 comprises a second operational amplifier N22, a first input terminal of the second operational amplifier N22 is electrically connected to the first output terminal of the voltage sensor 1122 (for example, connected to the first output terminal of the voltage sensor 1122 via a resistor R25), a second input terminal of the second operational amplifier N22 is electrically connected to the second output terminal of the voltage sensor 1122 (for example, connected to the second output terminal of the voltage sensor 1122 via a resistor R26), and an output terminal of the second operational amplifier N22 is electrically connected to the protection logic processing module 114 and/or the first control module 111.

The first differential-to-single-ended unit 1123 further comprises a fourth differential resistor R25 and a fifth differential resistor R26, wherein the fourth differential resistor R25 is electrically connected between the first output terminal of the voltage sensor 1122 and the first input terminal of the second operational amplifier N22;

the fifth differential resistor R26 is electrically connected between the second output terminal of the first voltage sensor 1122 and the second input terminal of the second operational amplifier N22.

The first differential-to-single-ended unit 1123 further comprises a sixth differential resistor R27, and the sixth differential resistor R27 is electrically connected between the second input terminal of the second operational amplifier N22 and the output terminal of the second operational amplifier N22.

In addition, the first input terminal of the second operational amplifier N22 is also connected to ground via a resistor R28.

Still further, the voltage measurement module 112 further includes a filtering module 1124, a first end of the filtering module 1124 is electrically connected to the output end of the differential amplification unit 1121, and a second end of the filtering module 1124 is electrically connected to the input end of the voltage sensor 1122.

The filtering module 1124 includes a filter resistor R24 and a filter capacitor C21.

A first end of the filter resistor R24 is electrically connected to the output end of the differential amplification unit 1121, and a second end of the filter resistor R24 is electrically connected to the input end of the voltage sensor 1122; the first end of the filter capacitor C21 is electrically connected to the second end of the filter resistor R24, and the second end of the filter capacitor C21 is electrically connected to ground.

In a specific example, the voltage (Vp-Vn) of the heating power supply varies from 0V to 35V, and after differential amplification, the variation range may be, for example, from 0V to 2V; the front stage can form a low-pass filter by passing through a filter resistor R24 and a filter capacitor C21, filters noise with frequency above 39.8Hz, and inputs the noise to a voltage sensor 1122 with isolation; the voltage sensor 1122 may be a single input, differential output, gain-1 voltage sensor, which performs isolation protection. The voltage sensor is input into the differential-to-single-ended unit, the achievable amplification factor in the unit is 1, for example, the voltage output range of the level is equal to the voltage input range (0-2V) of the previous level, the voltage output range is input into an ADC pin of the control module, and the ADC reads voltage measurement information.

Besides the measurement of the voltage and the temperature, the monitoring of the current output to the heating part can be realized.

Referring to fig. 10, the first processing circuit further includes a current measuring module 113.

The current measuring module 113 is electrically connected to an output side of the power module 12 to measure component current information output from the power module 12 to the heating component 22;

the current measurement module 113 is further electrically connected to the first control module 111, and feeds back a current measurement signal representing the component current information to the first control module 111.

In a further scheme, referring to fig. 10, the current measuring module includes a converting unit 1131, a second differential amplifying unit 1132, a second voltage sensor 1133, and a second differential-to-single-ended unit 1134.

An input end of the converting unit 1131 is electrically connected to an output side of the power module 12, and an output end of the converting unit 1131 is electrically connected to the second differential amplifying unit 1132, and is configured to convert the current flowing through the heating component 22 into a voltage and output a voltage representing the component current information;

a first input end of the second differential amplifying unit 1132 and a second input end of the second differential amplifying unit are electrically connected to a first output end of the converting unit 1131 and a second output end of the converting unit 1131, respectively, and an output end of the second differential amplifying unit 1132 is electrically connected to an input end of the second voltage sensor 1133;

the second differential amplifying unit 1132 is configured to perform differential processing on two ends of the output side of the converting unit 1131, and amplify a differential result to obtain a single-ended second amplified signal; transmitting the second amplified signal to an input side of the second voltage sensor 1133;

a first output terminal of the second voltage sensor 1133 is electrically connected to a first input terminal of the second differential-to-single-ended unit 1134, and a second output terminal of the second voltage sensor 1133 is electrically connected to a second input terminal of the second differential-to-single-ended unit 1134;

the second voltage sensor 1133 is configured to convert the second amplified signal into a second differential signal, and transmit the second differential signal to the second differential-to-single-ended unit 1134;

the second differential-to-single-ended unit 1134 is configured to convert the second differential signal into a single-ended current measurement signal, and send the single-ended current measurement signal to the first control module 111.

Referring to fig. 11, the second differential amplifying unit 1132 includes a first operational amplifier N31, a first input terminal of the first operational amplifier N31 is electrically connected to the first output terminal of the converting unit 1131, a second input terminal of the first operational amplifier N31 is electrically connected to the second output terminal of the converting unit 1131, and an output terminal of the first operational amplifier N31 is electrically connected to the input terminal of the second voltage sensor 1133.

Further, the differential amplifying unit 1132 further includes a first feedback resistor R32, and the first feedback resistor R32 is electrically connected between the second input terminal of the first operational amplifier N31 and the output terminal of the first operational amplifier N31.

The current measurement module 113 further includes a filtering module 1135, a first end of the filtering module 1135 is electrically connected to the output end of the second differential amplifying unit 1132, and a second end of the filtering module 1135 is electrically connected to the input end of the second voltage sensor 1133.

Still further, the filtering module 1135 includes a filtering resistor R33 and a filtering capacitor C31,

a first end of the filter resistor R33 is electrically connected to the output end of the differential amplifying unit 1132, and a second end of the filter resistor R33 is electrically connected to the input end of the second voltage sensor 1133;

the first end of the filter capacitor C31 is electrically connected to the second end of the filter resistor R33, and the second end of the filter capacitor C31 is electrically connected to ground.

Referring to fig. 11, the second differential-to-single-ended unit includes a second operational amplifier N32, a first input terminal of the second operational amplifier N32 is electrically connected to the first output terminal of the second voltage sensor, a second input terminal of the second operational amplifier N32 is electrically connected to the second output terminal of the second voltage sensor 1133, and an output terminal of the second operational amplifier N32 is electrically connected to the first control module 111.

Further, the second differential-to-single-ended unit 1134 further includes a first differential resistor R37, a second differential resistor R38, and a second feedback resistor R39,

the first differential resistor R37 is electrically connected between the first output terminal of the second voltage sensor 1133 and the first input terminal of the second operational amplifier N32;

the second differential resistor R38 is electrically connected between the second output terminal of the second voltage sensor 1133 and the second input terminal of the second operational amplifier N32;

the second feedback resistor R39 is electrically connected between the second input terminal of the second operational amplifier N32 and the output terminal of the second operational amplifier N32.

The current measuring module 113 further includes an access resistor R31, and the access resistor R31 is electrically connected between the second output terminal of the converting unit 1131 and the second input terminal of the differential amplifying unit 1132.

In addition, the SHDN terminal (which can be understood as a closed control port) of the second voltage sensor 1133 is grounded via the resistor R34, the power supply terminal of the first side of the second voltage sensor 1133 is connected to the voltage source and to the capacitor C35, and the power supply terminal of the second side is connected to the voltage source and to the capacitor C33; a capacitor C34 is connected between the two output terminals of the second voltage sensor 1133, and the first input terminal of the second operational amplifier N32 is also connected to ground via a resistor R36.

In the above scheme, the conversion unit may sample current changes through a resistor, and convert the current signal into a voltage signal. The actual current variation range may be, for example: 0-30A, sampling and converting the voltage signal into a voltage signal in a range of 0-0.06V through a resistance sampling 2.0m omega circuit, and outputting the voltage signal after amplifying (for example, amplifying by 31.6 times) through a second differential amplification unit, wherein the output voltage range can be 0-1.98V. Then, the noise (for example, noise with a frequency above 39.8 Hz) is filtered by a low-pass filter formed by the filter resistor R33 and the filter capacitor C31, and is input to an isolated voltage sensor (i.e., the second voltage sensor 1133). The second voltage sensor 1133 may be a single input, differential output, gain-1 voltage converter, which performs the isolation protection function. Then, the signal can be input into a second differential-to-single-ended module composed of a second operational amplifier N32 and the like, the amplification factor of the second differential-to-single-ended module can be 1, the voltage output range of the first differential-to-single-ended module is equal to the voltage input range (0-1.98V) of the previous stage, the first differential-to-single-ended module is input into an ADC pin of the control module, and after the voltage data is read by the ADC, the voltage data can be calculated and converted into current data, so that coil current information can.

Referring to fig. 12, the switch module 13 includes a first transistor Q1, a second transistor Q2 and a driving unit 131;

a first terminal of the first transistor Q1 is electrically connected to the positive electrode of the output side of the power module 12, a second terminal of the first transistor Q1 is electrically connected to the first terminal of the heating component 22, a first terminal of the second transistor Q2 is electrically connected to the negative electrode of the output side of the power module 12, and a second terminal of the second transistor Q2 is electrically connected to the second terminal of the heating component 22; the transistor can be, for example, a field effect transistor, a MOS transistor, a triode, etc.

The driving unit 131 is electrically connected to the protection logic processing module 114, a control terminal (e.g., a gate) of the first transistor Q1, and a control terminal (e.g., a gate) of the second transistor Q2, respectively, and is configured to control the first transistor Q1 and the second transistor Q2 to be turned on or off simultaneously in response to a switching control signal output by the protection logic processing module 114.

In addition, the driving unit 131 may also be connected to the first control module 111, and further output a switch control signal under the control of the first control module 111.

Further, referring to fig. 13, the driving unit 131 includes a third transistor Q3, an opto-isolator U11, and a transistor driver U12; the transistor can be, for example, a field effect transistor, a MOS transistor, a triode, etc.

A control terminal (for example, a gate electrode) of the third transistor Q3 is electrically connected to the protection logic processing module 114, a first terminal of the third transistor Q3 is electrically connected to the input side of the opto-isolator U11, and a second terminal of the third transistor Q3 is electrically connected to ground;

the output side of the optocoupler isolator U11 is electrically connected with the input end of the transistor driver U12;

a first output terminal (specifically, a VoutA + terminal) of the transistor driver U12 is electrically connected to the control terminal of the first transistor Q1, a second output terminal (specifically, a VoutA-terminal) of the transistor driver U12 is electrically connected to the second terminal of the first transistor Q1, a third output terminal (specifically, a VoutB + terminal) of the transistor driver U12 is electrically connected to the control terminal of the second transistor Q2, and a fourth output terminal (specifically, a VoutB-terminal) of the transistor driver U12 is electrically connected to the second terminal of the second transistor Q2.

In addition, the control end of the third transistor Q3 is also grounded through a pull-down resistor R13, a resistor R14 is connected between the control end and the second end of the first transistor Q1, a resistor R15 is connected between the control end and the second end of the second transistor Q2, a resistor R11 is further arranged between the control end of the first transistor Q1 and the first output end of the transistor driver U12, and a resistor R12 is further arranged between the control end of the second transistor Q2 and the third output end of the transistor driver U12.

Referring to fig. 14, a controlled terminal of the power module 12 is electrically connected to the first control module 111 through a voltage regulating module 118. In the above alternative, the adjustment of the output voltage of the power supply module can be realized by the voltage adjusting module.

Specifically, the voltage regulation module 118 includes: a voltage follower U71, a first input terminal of the voltage follower U71 is electrically connected to the first control module 111, a second input terminal of the voltage follower U71 is electrically connected to an output terminal of the voltage follower U71, and an output terminal of the voltage follower U71 is electrically connected to the controlled terminal of the power module 12.

In a further aspect, the voltage regulation module 118 further includes: a first voltage regulating resistor R71 and a second voltage regulating resistor R72, wherein one end of the first voltage regulating resistor R71 is electrically connected with the first control module 111, and the other end of the first voltage regulating resistor R71 is electrically connected with a first input end of the voltage follower U71; one end of the second voltage-regulating resistor R72 is electrically connected to the first input end of the voltage follower U71, and the other end of the second voltage-regulating resistor R72 is grounded, wherein the first input end of the voltage follower U71 can be understood as a non-inverting input end thereof.

In the scheme, the voltage regulation circuit can be realized by using a self-contained DAC module in a first control module (such as an MCU), the output control voltage range is 0-3.3V, and the voltage regulation circuit can be input to a power supply module to regulate voltage after the driving capability is increased through a following circuit formed by a voltage follower. In one example, the voltage regulation range can be, for example, 2 to 30V. In the case of a constant resistance of the heating element (e.g. heating coil), the higher the voltage of the regulated output, the higher the heating power.

Referring to fig. 16, in one embodiment, the injection motor can be controlled by a motor driver U41, a controlled terminal (e.g., STBY/RST terminal) of the motor driver U41 can be connected to the protection logic processing module 114 to drive the injection motor under the control of the protection logic processing module 114, and the controlled terminal can also be connected to the first control module 111 to be directly controlled by the first control module 111.

In addition, the VSB terminal and the VSA terminal of the motor driver U41 may receive voltage sources (e.g., +24V voltage sources), and are respectively connected to the capacitor C43, the capacitor C44, the capacitor C45, and the capacitor C46, and the VBOOT terminal of the motor driver is also connected to the voltage sources via the capacitor C41. The VSB terminal and the VBOOT terminal of the motor driver may be connected to a first terminal of a capacitor C42 through a diode D41 and a diode D42, respectively, and a second terminal of the capacitor C42 is electrically connected to a CP terminal of the motor driver U41. The STCK end and the FLAG end of the motor driver U41 can be connected to the outside, and are connected to corresponding voltage sources through a resistor R41 and a resistor R42. The VDD terminal of the motor driver U41 may also be connected to ground via a capacitor C47. The injection motor can be a stepping motor, water in the injection part can be pushed by the stepping motor, the stepping motor is driven by a chip special for the stepping motor (such as a motor driver shown in fig. 16), the chip can control the stepping motor to generate a customized motion curve and has the functions of acceleration, deceleration, speed or target position control, specifically, micro-step control of at least 16 steps can be provided, a controller and a power amplifier are integrated, the periphery can be configured and used without an additional MOS (metal oxide semiconductor) transistor, a first control module (such as an MCU) can realize control through an SPI (serial peripheral interface) bus programming register group, and the chip has the functions of overheat protection, undervoltage protection and overcurrent protection and ensures that the circuit is not damaged under the abnormal condition.

In a specific example, the stepping motor used is a special motor dedicated to precise control of speed and position, the rotation of which is performed step by step at a fixed angle (step angle). Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steam ablation device, comprising: the injection device comprises a handle, a heating part, a power supply module, an injection part and a first processing circuit;

the first processing circuit comprises a first control module, a voltage comparison module, a temperature comparison module and a protection logic processing module, wherein the voltage comparison module and the temperature comparison module are electrically connected to the first side of the protection logic processing module, and the first side of the protection logic processing module is electrically connected with the first control module;

2. The steam ablation device of claim 1, wherein the voltage comparison module comprises a voltage comparator and a timer;

3. The steam ablation device of claim 1, wherein: the first processing circuit further comprises: a voltage measurement module;

4. The protective treatment method of a steam ablation device according to claim 3, wherein the voltage measurement module comprises: the first differential amplification unit, the first voltage sensor and the first differential-to-single-ended conversion unit;

5. The steam ablation device of claim 1, wherein the temperature comparison module comprises a temperature comparator;

6. The steam ablation device of claim 5, further comprising a second processing circuit and a temperature sensor disposed on the handle, the second processing circuit comprising: the temperature measuring module and the second control module; the first control module and the second control module are configured to be capable of communicating;

the temperature measurement module is electrically connected with the temperature sensor and the second control module and used for feeding back component temperature information to the second control module according to the temperature acquisition signal;

7. The steam ablation device of claim 6, wherein the temperature measurement module comprises: the device comprises a preamplification unit, a filtering unit and a signal amplification unit;

the first input end of the pre-amplification unit is electrically connected with the first pole of the temperature sensor, the second input end of the pre-amplification unit is electrically connected with the second pole of the temperature sensor, and the output end of the pre-amplification unit is electrically connected with the input end of the signal amplification unit;

8. The steam ablation device of claim 1, wherein the first processing circuit further comprises: a watchdog monitoring module; the watchdog monitoring module is electrically connected with an output end of the first control module for outputting a watchdog signal and a first side of the protection logic processing module;

the watchdog monitoring module is used for:

the protection logic processing module is used for:

triggering at least one specified protection action in response to the third protection trigger signal.

9. The steam ablation device of any one of claims 1 to 8, further comprising a switch module disposed between the power module and the heating component; the controlled end of the switch module, one controlled end of the power supply module and one controlled end of the injection part are electrically connected with the second side of the protection logic processing module;

the at least one specified protection action comprises at least one of:

a first protection action of controlling the switch-off of the switch module;

10. The steam ablation device of claim 9, wherein the switching module comprises a first transistor, a second transistor, and a drive unit;

11. The steam ablation device of claim 10, wherein the drive unit comprises a third transistor, a light-coupling isolator and a transistor driver;

12. The steam ablation device of claim 9,

the protection logic processing module is specifically configured to:

and when any one protection trigger signal and an injection enabling signal are acquired, triggering the first control module to execute the second protection action, wherein the injection enabling signal represents that the injection part needs to be controlled to work.

13. The steam ablation device of claim 12, wherein the protection logic processing module comprises an or gate, a first and second and third and gate; the input side of the OR gate is used for accessing each protection trigger signal, and the output end of the OR gate is respectively connected with the input ends of the first AND gate, the second AND gate and the third AND gate; the input end of the first AND gate is further connected with the first heating enabling signal, the input end of the second AND gate is further connected with the second heating enabling signal, the input end of the third AND gate is further connected with the injection enabling signal, and the output ends of the first AND gate, the second AND gate and the third AND gate are respectively connected to the power supply module, the switch module and the injection part.

14. The steam ablation device of any one of claims 1 to 8, wherein a controlled terminal of the power module is electrically connected to the first control module via a voltage regulation module.

15. The steam ablation device of any one of claims 1 to 8, wherein the first processing circuit further comprises a current measurement module;

the current measuring module is electrically connected with the output side of the power supply module so as to measure component current information of the current output to the heating component by the power supply module;

16. The steam ablation device of claim 15, wherein the current measurement module comprises a conversion unit, a second differential amplification unit, a second voltage sensor, and a second differential to single ended unit,