CN112834791B

CN112834791B - Steam ablation apparatus

Info

Publication number: CN112834791B
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: 2024-09-17
Anticipated expiration: 2040-12-31
Also published as: CN112834791A

Abstract

The present invention provides a steam ablation apparatus comprising: a handle, a heating component, a power module, an injection part and a first processing circuit; the handle is internally provided with a containing cavity and a nozzle connected to the containing cavity, the heating component is arranged in the containing cavity, the power supply module is electrically connected to the heating component to supply power to the heating component so as to heat the heating component, and the injection part is connected to the containing cavity so as to inject water into the containing 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 a 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.

Description

Steam ablation apparatus

Technical Field

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

Background

Steam ablation is an emerging technique that forms high temperature steam and then applies the steam to a target site within a patient's body, and can be used for local tissue inflammatory reactions, lesion repair, and the like. Steam ablation may be applied, for example, to the bronchi, but is not limited thereto.

In the steam ablation device, the heating component can be arranged in the cavity, the power supply can heat the heating component, then heat and evaporate water fed into the cavity to form steam, however, safety in the working process is difficult to ensure, for example, when the temperature of the heating component is too high, the voltage is too high, the current is too high, and working signals (such as watchdog signals) are wrong, potential safety hazards can be caused.

Disclosure of Invention

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

The present invention provides a steam ablation apparatus comprising: a handle, a heating component, a power module, an injection part and a first processing circuit;

The handle is internally provided with a containing cavity and a nozzle connected to the containing cavity, the heating component is arranged in the containing cavity, the power supply module is electrically connected to the heating component to supply power to the heating component so as to heat the heating component, and the injection part is connected to the containing cavity so as to inject water into the containing 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 a first side of the protection logic processing module, and a second side of the protection logic processing module is electrically connected to the first control module;

The voltage comparison module is used for determining 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 and threshold voltage of the power supply module; the first guard trigger signal characterizes the output voltage information to be always above the threshold voltage for a first time period;

The temperature comparison module is used for determining the 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 the threshold temperature; the second protection trigger signal characterizes the component temperature information as being above the threshold temperature;

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

According to the invention, through the voltage comparison module and the temperature comparison module, dangerous situations such as that the temperature information of the component is higher than the threshold temperature, the output voltage information is higher than the threshold voltage and the first duration is kept can be monitored, so that the protection action is triggered by the protection logic processing module in time, and the safety is effectively ensured.

Meanwhile, in the invention, because the containing cavity is arranged in the handle, after the water is quantitatively injected into the containing cavity through the injection part, the water can be heated by the heating part and quickly evaporated 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 value, 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 can be automatically judged based on the comparison and timing of the voltages, so as to provide a basis for automatic triggering of the protection action.

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

The voltage measurement 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 measurement 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 scheme, automatic measurement and feedback of voltage can be realized, and an accurate basis is provided for execution of the protection action.

Optionally, the voltage measurement module includes: the first differential amplifying unit, the first voltage sensor and the first differential-to-single-ended unit;

The first input end and the second input end of the first differential amplification unit are respectively and electrically connected with the positive electrode of the output side of the power supply module and the negative electrode of the output side of the power supply module, and the output end of the first differential amplification unit is electrically connected with the input end of the first voltage sensor;

The first differential amplifying 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 the differential result to obtain a single-ended first amplified signal; transmitting the first amplified signal to an input side of the first voltage sensor;

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

The first voltage sensor is used for converting the first amplified signal into a first differential signal and transmitting 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 action of the differential amplifying unit on the circuit parameters, and meanwhile, the common mode signal can be restrained by amplifying the differential 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 value, 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 can be automatically judged based on the comparison of the temperatures, so that a basis is provided for automatic triggering of the protection action.

Optionally, the steam ablation apparatus 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 component temperature information and sending a temperature acquisition signal representing the component temperature information to the temperature measurement module;

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

The temperature comparison module is configured to be able to obtain the temperature measurement signal directly or indirectly from the second control module.

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

Optionally, the temperature measurement module includes: the device comprises a pre-amplifying unit, a filtering unit and a signal amplifying unit;

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

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

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

In the above alternative scheme, the temperature represented by the signal can be effectively ensured to be accurately transmitted through the amplification of the signal amplifying unit, the pre-amplifying unit and the filtering of the filtering unit, so that 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 the output end of the first control module for outputting watchdog signals and the 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, a third protection trigger signal is sent to the protection logic processing module;

the protection logic processing module is used for:

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

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

Optionally, the steam ablation apparatus further includes a switch module, where the switch module is disposed between the power module and the heating component; the controlled end of the switch module, one controlled end of the power module and one 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 includes at least one of:

a first protection action of controlling the switch module to be turned off;

Controlling the second protection action of stopping the operation of the injection part;

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

In the above alternative scheme, a plurality of protection actions are defined, and the safety of the equipment can be effectively ensured through the execution of the protection actions. Meanwhile, the control of heating or not can be realized through the control of the switch module.

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

The first end of the first transistor is electrically connected with the positive electrode of the output side of the power supply module, the second end of the first transistor is electrically connected with the first end of the heating component, the first end of the second transistor is electrically connected with the negative electrode of the output side of the power supply module, and the second end of the second transistor is electrically connected with the second end of the heating component;

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

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

Optionally, the driving unit includes a third transistor, an optocoupler 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 optocoupler isolator, and the second end of the third transistor is electrically connected with ground;

the output end of the optocoupler 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 of the first control module and the protection logic processing module is larger than that of the power module and is in different power domains, the 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 obtained, triggering the first control module to execute the third protection action, wherein the first heating enabling signal characterizes the output voltage to be controlled of the power supply module;

When any one protection trigger signal and a second heating enabling signal are obtained, triggering the first control module to execute the first protection action, wherein the second heating enabling signal characterizes that a switch module between the power module and the heating component needs to be controlled to be conducted;

When any one protection trigger signal and an injection enabling signal are obtained, the first control module is triggered to execute the third protection action, and the injection enabling signal characterizes 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 also connected with the first heating enabling signal, the input end of the second AND gate is also connected with the second heating enabling signal, the input end of the third AND gate is also 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 scheme, through the combined use of logic processing devices such as AND gates, OR gates and the like, the scheme can meet the following conditions: any protection trigger signal 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, so that the protection work can be realized for the protection equipment.

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

In the above alternative, the voltage regulation of the output voltage of the power supply module can be realized through the voltage regulation module.

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

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

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

In the scheme, the current information of the component can be accurately acquired and fed back to the first control module through the current measuring module, so that a basis is provided for further control and/or protection actions.

Optionally, 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,

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 component current information;

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

the first output end of the second voltage sensor is electrically connected with the first input end of the second differential-to-single-ended unit, and the second output end of the second voltage sensor is electrically connected with the 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 the single-ended current measurement signal, and send the single-ended current measurement signal to the first control module.

In the scheme, the automatic acquisition and feedback of the 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 the circuit parameters, and meanwhile, the common mode signal can be restrained by utilizing the amplified differential mode signal.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

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

FIG. 2 is a schematic diagram showing a configuration of a steam ablation apparatus in accordance with an embodiment of the invention;

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

FIG. 4 is a schematic diagram showing a partial configuration of a first processing circuit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing a partial configuration of a first processing circuit according to an embodiment of the invention;

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

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

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

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

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

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

fig. 16 is a schematic view of a driving module of an injection motor according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

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

The handle 2 is understood to be a structure suitable for operating to perform steam injection, in which a chamber 21 may be provided, and a spout 23 connected to the chamber 21, and between the chamber 21 and the spout 23, a valve and a pipe for controlling the on-off of steam may be provided.

The heating element 22 is disposed in the cavity 21, and may be understood as an element capable of heating water entering the cavity to generate steam, for example, may include a heating coil, a heating rod, or any other element suitable for heating, and may be used as the heating element 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 chamber 22 to inject water into the chamber 22; wherein the injection effected may be effected electrically, without excluding the manner of manual implementation. In one embodiment, the injection part may for example comprise an injection body having an injection cavity in which an injection movable member is provided, which may be coupled to an injection motor by a transmission member so as to be moved along the inner wall of the injection cavity by the drive of the injection motor, thereby injecting water in the injection cavity into the cavity 22.

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

Wherein, 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 (for example, directly electrically connected to the first control module 111, or electrically connected to the first control module 111 via a protection logic processing module 114). Further, the control of whether to heat or not can be realized by the control of the switch module. Wherein the switching module 13 may be any device or combination of devices that can be controlled to switch on and off.

In the illustrated embodiment, the power module 12, the switch module 13, the first processing circuit 11, the injection part 14, etc. may be provided in the case 1, and in other examples, means provided in other structures or respectively in different structures are not excluded. Meanwhile, the possibility that the switch module 13 and the like are arranged on the handle 2 is not excluded in the embodiment of the invention.

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

In embodiments employing the cartridge 1 and the handle 2, the water outlet of the injection part 14 may be connected to a corresponding interface of the handle 2 via a water pipe and then to the cavity 21, and the circuit configuration such as the power module 12 may be connected to the handle via an electric wire, for example, the power module 12 may be connected to one end of the electric wire via 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 then to the heating element.

In one embodiment, 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 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 comparison 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 and the threshold voltage of the power module 12.

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

The first protection trigger signal characterizes that the output voltage information is always higher than the threshold voltage in a first time period, and further, the first protection trigger signal can embody a dangerous situation that the voltage is kept in a higher range in the first time period, and timely feedback of the dangerous situation can be achieved through feedback of the first protection trigger signal.

The temperature comparison 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 and a threshold temperature of the heating component 22;

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

The second protection trigger signal characterizes the component temperature information as being above the threshold temperature; furthermore, the second protection trigger signal can show dangerous situations with the temperature kept in a higher range, and timely feedback of the dangerous situations can be realized through feedback of the second protection trigger signal.

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

According to the scheme, dangerous situations such as the temperature information of the component is higher than the threshold temperature, the output voltage information is higher than the threshold voltage and the first duration is kept 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.

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 the 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 receipt of the third protection trigger signal, the first control module 111 is triggered to perform the at least one specified protection action.

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

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

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

A first input terminal of the voltage comparator 1151 is connected to a voltage measurement signal (for example, a voltage measurement signal output by the voltage measurement module 112) for representing the output voltage information, a second input terminal of the voltage comparator 1151 is connected to a reference voltage (i.e., a first reference voltage) corresponding to the voltage threshold, 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 the 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 received by the voltage comparator 1151, compared with a threshold voltage of 19V, and then counted by the first timer 1152, when the collected voltage exceeds the threshold voltage (e.g., 19V), the voltage comparator 1151 can output a low level, and after the duration exceeds a first time (e.g., 5 seconds), an error condition is asserted, and a protection operation is needed.

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, the voltage measurement signal may be input to the 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 (for example, a +3v voltage source), the other end may be grounded through the voltage dividing resistor R613, the inverting input terminal of the voltage comparator 1151 may be connected between the two voltage dividing resistors to obtain the required reference voltage, and the output terminal of the voltage comparator 1151 may be connected to the voltage source through the pull-up resistor R603.

In a further scheme, the first timer 1152 may be a timer chip U61 (also referred to as a delay chip), meanwhile, the DIV end 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 end of the timer chip U61 may be grounded via a resistor R606.

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

A first input terminal of the temperature comparator 1161 is connected to a temperature measurement signal for representing the temperature information of the component, a second input terminal 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 terminal of the temperature comparator 1161 is connected to a first side of the protection logic processing module 114.

In one example, after the related device (e.g. the temperature measurement module 251) converts the temperature signal into a voltage signal, the voltage signal is connected to the temperature comparator 1161 (also a voltage comparator), where a reference voltage of 1.9V can be set corresponding to the temperature threshold of 180 ℃, when the temperature exceeds 180 ℃, the comparator outputs a low level, and this indicates that the error state is valid, and the 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 can be input to the non-inverting input terminal of the voltage comparator 1161, one end of the voltage dividing resistor R607 can be connected to a voltage source (for example, a +3v voltage source), the other end of the voltage dividing resistor R608 can be grounded, the non-inverting input terminal of the temperature comparator 1161 can be connected between the two voltage dividing resistors to obtain a required reference voltage, and the output terminal of the temperature comparator 1161 can be connected to the ground through 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 end of which is connected to a watchdog signal, and an output end of which is connected to the protection logic processing module 114, meanwhile, a DIV end 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 end of the timer chip U62 may be grounded via a resistor R612, and a power supply end of the timer chip U62 may be connected to the voltage source and a capacitor C61.

For further example, during the normal operation of the software of the first control module, the WATCHDOG signal (i.e. the WATCHDOG signal) will continuously output a PWM wave for 200ms, when the operation of the software of the first control module is abnormal or has an error, the WATCHDOG signal no longer outputs a PWM wave, but outputs a low level, and the timer chip U62 can monitor the change of the WATCHDOG pin signal in the first control module, which indicates that the error state is effective and that protection action is needed.

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

a first protection action of controlling the switch module to be turned off;

In the above alternative scheme, a plurality of protection actions are defined, and the safety of the equipment can be effectively ensured 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 the protection trigger signals (for example, any one of the first protection trigger signal, the second protection trigger signal and the third protection trigger signal) and the first heating enable signal is acquired, triggering the first control module 111 to execute the third protection action, wherein the first heating enable signal characterizes the output voltage required to be controlled by the power module;

Triggering the first control module 111 to perform the first protection action upon acquisition of any one of protection trigger signals (e.g., any one of a first protection trigger signal, a second protection trigger signal, a third protection trigger signal), and a second heating enable signal, the second heating enable signal being indicative of a switch module between the power module and the heating element being conductive;

when any one of the protection trigger signals (for example, any one of the first protection trigger signal, the second protection trigger signal and the third protection trigger signal) and the injection enabling signal is acquired, the first control module is triggered to execute the second protection action, and the injection enabling signal characterizes 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 (for example, to run).

The first heating enable signal, the second heating enable signal and the injection enable signal related to the above may be sent by the first control module, or may be fed back by the switch module, the power module, the injection part or related circuits thereof, and no matter where the signals are obtained, so long as the signals do not depart from the scope of the embodiment of the present invention.

To implement the above logic function, 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, for example.

The input side of the or gate U63 is used for accessing each protection trigger signal (i.e. accessing the first protection trigger signal, the second protection trigger signal and the 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, a signal when the high level (or low level) is set to the HEATER_ENABLE_1 signal shown in FIG. 5, the input terminal of the second and gate U65 is further connected to the second heating ENABLE signal, for example, a signal when the high level (or low level) is set to the HEATER_ENABLE_2 signal shown in FIG. 5, the input terminal of the third and gate U66 is further connected to the injection ENABLE signal, for example, a signal when the high level (or low level) is set to the STBY signal shown in FIG. 5, and the output terminals of the first and gate U64, the second and the third and gate U65 are respectively connected to the power module 12, the switch module 13 and the injection portion 14, thereby realizing control thereof.

A resistor R614 may be further disposed between the first and gate U64 and the power module 12, so as to meet a voltage required for controlling the power module 12 through the resistor.

In the embodiment of the invention, the voltage measurement module and the temperature measurement module can be used for obtaining 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 arranged in the box body 1, the temperature measurement module can be arranged in the handle 2, and other modes are not excluded for arranging the circuit modules.

Referring to fig. 3, the steam ablation apparatus further includes a second processing circuit 25 and a temperature sensor 24 disposed on the handle 2, and 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 capable of communication; for example, the first control module 111 and the second control module 252 may communicate through a communication line provided on an electric wire, where 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 may be provided on different electric wires, and a means for implementing communication between the first control module 111 and the second control module 252 by using a wireless communication manner is not excluded in the embodiment of the present invention. In the case of communication between the first control module 111 and the second control module 252, the second control module 252 may obtain 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 indicative of the component temperature information to the temperature measurement module;

The temperature measurement 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 acquisition 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 through a communication line, so as to obtain a temperature measurement signal, and the temperature comparison module 116 may also be in communication with the second control module through the first control module, so as to obtain a temperature measurement signal.

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

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

A first end of the filtering unit 2513 is electrically connected to a first pole of the temperature sensor 24 and a first input end of the pre-amplifying unit 2511, and a second end of the filtering unit 2513 is electrically connected to a second pole of the temperature sensor 24 and a second input end of the pre-amplifying 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 still a further aspect, referring to fig. 7, in the case where the temperature sensor employs a thermocouple, the pre-amplifying unit 2511 may employ a thermocouple amplifying chip U51, which may be a dedicated thermocouple amplifying chip with junction temperature compensation, specifically, the temperature-voltage variation relationship of the output of the chip may be vout=temp×5mv/C, where Temp represents the temperature, and further, the output voltage variation range may be 0-300 ℃.

The filtering 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-amplifying unit 2511;

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

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

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

In a further aspect, the signal amplifying unit 2512 includes 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 a non-inverting input terminal thereof, and the second input terminal may be an 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 end of the pull-down resistor R52 is electrically connected to the second input of the operational amplifier N51, a second end of the pull-down resistor R52 is electrically connected to ground,

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

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

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

the voltage measurement 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 measurement signal;

the voltage measurement module is electrically connected to the voltage comparison module 115, and is configured to send the voltage measurement signal to the voltage comparison module 115.

Further, referring to fig. 8, the voltage measurement 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 respectively and electrically connected with 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, and an output end of the first differential amplification unit 1121 is electrically connected with 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 comparing 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 aspect, referring to fig. 9, the first differential amplifying unit 1121 includes a first operational amplifier N21, a first input end 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 end 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 end of the first operational amplifier N21 is electrically connected to the input end of the first voltage sensor 1122.

The first differential amplifying unit 1121 further includes a first differential resistor R22 and a second differential resistor R23, where the first differential resistor R22 is electrically connected between the positive electrode of the output end of the power module and the first input end (for example, a non-inverting input end) of the first operational amplifier N21; the second differential resistor R23 is electrically connected between the negative electrode of the output terminal of the power supply module and the second input terminal (for example, the 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 be grounded via a resistor R21.

Further, the first differential to single-ended unit 1123 includes a second operational amplifier N22, where a first input terminal of the second operational amplifier N22 is electrically connected to the first output terminal of the voltage sensor 1122 (e.g., 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 (e.g., 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 includes a fourth differential resistor R25 and a fifth differential resistor R26, where the fourth differential resistor R25 is electrically connected between the first output end of the voltage sensor 1122 and the first input end 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 includes a sixth differential resistor R27, where 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 grounded via a resistor R28.

Still further, the voltage measurement module 112 further includes a filtering module 1124, where a first end of the filtering module 1124 is electrically connected to the output end of the differential amplifying 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 filtering resistor R24 and a filtering capacitor C21.

The first end of the filter resistor R24 is electrically connected to the output end of the differential amplifying unit 1121, and the 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 source ranges from 0v to 35v, and the range of variation after differential amplification may be, for example, from 0v to 2v; the front stage can form a low-pass filter through a filter resistor R24 and a filter capacitor C21 to filter noise with the frequency of more than 39.8Hz, and the noise is input into a voltage sensor 1122 with isolation; the voltage sensor 1122 can be a single input, differential output, and gain 1 voltage sensor, which provides isolation protection. The voltage sensor is input into a differential-to-single-ended unit, the achievable amplification factor in the unit is 1, the voltage output range of the stage is equal to the voltage input range (0-2V) of the front stage, the voltage sensor is input into an ADC pin of the control module, and the ADC reads voltage measurement information.

In addition to the above measurement of voltage and temperature, monitoring of the current output to the heating element can also be achieved.

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

The current measurement module 113 is electrically connected to the output side of the power module 12 to measure the 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 measurement module includes a conversion 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 conversion unit 1131 is electrically connected to an output side of the power module 12, and an output end of the conversion unit 1131 is electrically connected to the second differential amplification unit 1132, and is configured to convert a current flowing through the heating element 22 into a voltage, and output a voltage representing the element current information;

The first input end of the second differential amplification unit 1132 and the second input end of the second differential amplification unit are respectively and electrically connected with the first output end of the conversion unit 1131 and the second output end of the conversion unit 1131, and the output end of the second differential amplification unit 1132 is electrically connected with the 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 the 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 end of the second voltage sensor 1133 is electrically connected to a first input end of the second differential-to-single-ended unit 1134, and a second output end of the second voltage sensor 1133 is electrically connected to a second input end 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 the 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 end of the first operational amplifier N31 is electrically connected to a first output end of the converting unit 1131, a second input end of the first operational amplifier N31 is electrically connected to a second output end of the converting unit 1131, and an output end of the first operational amplifier N31 is electrically connected to an input end of the second voltage sensor 1133.

Further, the differential amplifying unit 1132 further includes a first feedback resistor R32, where 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,

The first end of the filter resistor R33 is electrically connected to the output end of the differential amplifying unit 1132, and the 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 measurement module 113 further includes a connection resistor R31, where the connection resistor R31 is electrically connected between the second output terminal of the conversion unit 1131 and the second input terminal of the differential amplification unit 1132.

In addition, the SHDN end (which can be understood as closing the control port) of the second voltage sensor 1133 is grounded via the resistor R34, the power supply end of the first side of the second voltage sensor 1133 is connected to the voltage source and connected to the capacitor C35, and the power supply end of the second side is connected to the voltage source and connected 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 further grounded via a resistor R36.

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

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

A first end of the first transistor Q1 is electrically connected to the positive electrode of the output side of the power module 12, a second end of the first transistor Q1 is electrically connected to the first end of the heating component 22, a first end of the second transistor Q2 is electrically connected to the negative electrode of the output side of the power module 12, and a second end of the second transistor Q2 is electrically connected to the second end of the heating component 22; the transistors may be, for example, field effect transistors, MOS transistors, and the like.

The driving unit 131 is electrically connected to the protection logic processing module 114, a control terminal (e.g. gate) of the first transistor Q1, and a control terminal (e.g. 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 switch 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 optocoupler isolator U11 and a transistor driver U12; the transistors may be, for example, field effect transistors, MOS transistors, and the like.

A control terminal (e.g., a gate) 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 optocoupler 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;

The first output terminal (particularly, the vouta+ terminal) of the transistor driver U12 is electrically connected to the control terminal of the first transistor Q1, the second output terminal (particularly, the VoutA-terminal) of the transistor driver U12 is electrically connected to the second terminal of the first transistor Q1, the third output terminal (particularly, the voutb+ terminal) of the transistor driver U12 is electrically connected to the control terminal of the second transistor Q2, and the fourth output terminal (particularly, the 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 further grounded via 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 disposed 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 disposed 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 end of the power module 12 is electrically connected to the first control module 111 via a voltage regulating module 118. In the above alternative, the voltage regulation of the output voltage of the power supply module can be realized through the voltage regulation module.

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

In a further aspect, the voltage regulating module 118 further includes: the first voltage regulating resistor R71 and the second voltage regulating resistor R72, 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 the 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, where the first input end of the voltage follower U71 may be understood as a non-inverting input end thereof.

In the above scheme, the voltage control circuit can be realized by using a DAC module in the first control module (for example, MCU), the output control voltage range is 0-3.3V, and the voltage can be input into the power supply module to adjust the voltage after the driving capability of the follower circuit formed by the voltage follower is increased. In one example, the voltage regulation range may be, for example, 2 to 30V. In the case where the resistance of the heating member (e.g., heating coil) is constant, the larger the voltage of the regulated output, the larger the heating power.

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

In addition, the VSB terminal and the VSA terminal of the motor driver U41 can be connected to a voltage source (e.g., a +24v voltage source), 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 source via the capacitor C41. The VSB terminal and the VBOOT terminal of the motor driver may be connected to the first terminal of the capacitor C42 through the diode D41 and the diode D42, respectively, and the second terminal of the capacitor C42 is electrically connected to the CP terminal of the motor driver U41. The STCK terminal and FLAG terminal of the motor driver U41 may be connected to the external and connected to the corresponding voltage source via the resistor R41 and the resistor R42. The VDD terminal of motor driver U41 may also be grounded via capacitor C47. The injection motor can be, for example, a stepping motor, water in the injection part can be pushed by the stepping motor, the stepping motor is driven by a special chip (such as a motor driver shown in fig. 16) of the stepping motor, the chip can control the stepping motor to generate a self-defined motion curve and has the functions of acceleration, deceleration and speed or target position control, specifically, at least 16 steps of micro-step control can be provided, an integrated controller and a power amplifier can be configured and used, the periphery can be configured and used without an additional MOS tube, a first control module (such as an MCU) can realize control by programming a register set through an SPI bus, and the chip has the functions of overheat protection, undervoltage protection and overcurrent protection, so that the circuit is not damaged under abnormal conditions.

In the specific example, the stepper motor used is a special motor dedicated to precise speed and position control, the rotation of which is operated step by step at a fixed angle (step angle). Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A steam ablation apparatus, comprising: a handle, a heating component, a power module, an injection part and a first processing circuit;

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

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 a 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;

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

2. The steam ablation apparatus of claim 1, wherein the voltage comparison module comprises 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 threshold voltage, 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.

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

The voltage measurement 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 a voltage measurement signal;

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

5. The steam ablation apparatus of claim 1, wherein the temperature comparison module comprises 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 threshold temperature, and the output end of the temperature comparator is connected with the first side of the protection logic processing module.

6. The steam ablation apparatus 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 measuring module is electrically connected with the temperature sensor and the second control module and is used for feeding back the temperature information of the component to the second control module according to the temperature acquisition signal;

7. The steam ablation apparatus of claim 6, wherein the temperature measurement module comprises: the device comprises a pre-amplifying unit, a filtering unit and a signal amplifying unit;

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

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

the watchdog monitoring module is used for:

the protection logic processing module is used for:

At least one designated protection action is triggered in response to the third protection trigger signal.

9. The steam ablation apparatus of any 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 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 includes at least one of:

a first protection action of controlling the switch module to be turned off;

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

11. The steam ablation apparatus of claim 10, wherein the drive unit comprises a third transistor, an optocoupler isolator, and a transistor driver;

12. The steam ablation apparatus of claim 9 wherein,

The protection logic processing module is specifically configured to:

When any one protection trigger signal and an injection enabling signal are obtained, the first control module is triggered to execute the second protection action, and the injection enabling signal characterizes that the injection part needs to be controlled to work.

13. The steam ablation apparatus of claim 12, wherein the protection logic processing module comprises an or gate, a first and gate, a second 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 also connected with the first heating enabling signal, the input end of the second AND gate is also connected with the second heating enabling signal, the input end of the third AND gate is also 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 apparatus of any of claims 1 to 8, wherein one controlled end of the power module is electrically connected to the first control module via a voltage regulation module.

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

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

16. The steam ablation apparatus 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,