CN114675682A

CN114675682A - Temperature control method and device for medical instrument and therapeutic apparatus

Info

Publication number: CN114675682A
Application number: CN202210178372.8A
Authority: CN
Inventors: 周闯
Original assignee: Microport Aesthetics Shanghai Group Co Ltd
Current assignee: Microport Aesthetics Shanghai Group Co Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-06-28
Also published as: CN116107360A; WO2023082862A1

Abstract

The invention provides a temperature control method, a temperature control device and a therapeutic apparatus for medical equipment, wherein the temperature control method comprises the following steps: firstly, regulating the current temperature from the initial temperature to a first temperature through a first temperature regulation stage and a second temperature regulation stage in a speed control stage according to a preset temperature regulation rate rule, a target temperature and a first temperature difference threshold; then in the temperature control stage, the current temperature is adjusted from the first temperature to a second temperature through a PID control algorithm; and maintaining the current temperature within a preset target temperature range. Therefore, the temperature control method and device for the medical instrument and the therapeutic apparatus provided by the invention can improve the safety, comfort and effectiveness of the medical instrument during treatment through the speed control stage and the temperature control stage.

Description

Temperature control method and device for medical instrument and therapeutic apparatus

The divisional application is based on the Chinese patent application with the application number of 202111328740.4, the application date of 2021, 11 months and 10 days, and the invention is named as a temperature control method, a temperature control device and a temperature control therapeutic apparatus for medical instruments.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a temperature control method and device for a medical instrument and a therapeutic apparatus.

Background

With the continuous improvement of the requirements of people on the healthy living standard and the rapid progress of the technology, the application of the temperature control in the field of medical appliances is more and more extensive. Taking a freezing fat-reducing therapeutic apparatus as an example, the freezing fat-reducing therapeutic apparatus is more and more widely applied due to the characteristics of non-invasion, no operation, no wound, easy operation and the like. The freezing fat-reducing therapeutic apparatus has the basic principle that triglyceride in human fat is converted into solid at low temperature (such as 5 ℃), freezing energy accurately controlled by a non-invasive freezing energy extraction device is transmitted to a specified fat-dissolving part, fat cells at the specified part are specifically eliminated, the triglyceride is converted into solid from liquid after the fat cells at the specified part are cooled to reach a specific low temperature, the triglyceride is died after crystallization and aging, the triglyceride is discharged out of the body through metabolism, and fat in the body is gradually reduced, so that the body-shaping effect of local fat dissolving is achieved.

However, in practical use, the existing cryo-lipid-reducing therapeutic apparatus has the following defects in temperature control: the risk of frostbite caused by too low temperature; comfort problems caused by too rapid temperature changes; the temperature instability in the using process causes the pain of patients and the like, the subcutaneous fat does not reach the target temperature, and the safety problem is caused.

Therefore, how to reasonably control the temperature of the medical device is a technical problem to be solved urgently by those skilled in the art.

It is noted that the information disclosed in this background of the invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide a temperature control method, a temperature control device and a therapeutic apparatus for a medical apparatus aiming at one or more problems of safety, comfort and effectiveness of temperature control of the medical apparatus in the prior art, wherein the temperature control method, the temperature control device and the therapeutic apparatus can be used for controlling by adopting different parameters according to different temperature stages, so that the temperature control of the medical apparatus has higher safety, comfort and effectiveness.

In order to achieve the above object, the present invention provides a temperature control method for a medical device, comprising:

according to a preset temperature regulation rate rule, a target temperature and a first temperature difference threshold value, regulating the current temperature from the initial temperature to a first temperature through a first temperature regulation stage and a second temperature regulation stage;

Adjusting the current temperature from the first temperature to a second temperature by steps S31-S34; and maintaining the current temperature within a preset target temperature range:

the initial stage temperature of the first temperature regulation stage is an initial temperature, the target stage temperature of the first temperature regulation stage and the initial stage temperature of the second temperature regulation stage are both a third temperature, and the target stage temperature of the second temperature regulation stage is the first temperature; the third temperature is between the initial temperature and the first temperature;

in the first temperature adjusting stage, controlling a first temperature change rate to adjust the current temperature from the initial temperature to the third temperature; wherein the first rate of temperature change is less than or equal to the first rate of temperature preset threshold;

in the second temperature adjusting stage, controlling a second temperature change rate to adjust the current temperature from the third temperature to the first temperature; wherein a second temperature rate preset threshold is less than or equal to the second temperature change rate, and the second temperature change rate is less than or equal to a third temperature rate preset threshold;

S31: taking the second output power of the power element for adjusting the temperature at the end of the second temperature adjusting phase as a third output power;

s32: calculating a third adjusting coefficient according to the second output power, the target temperature and the current temperature;

s33: calculating the third output power according to the temperature control proportional output, the temperature control integral output and the temperature control differential output;

the temperature control proportional output is obtained by calculation according to the third adjusting coefficient, the current temperature and the target temperature; the temperature control integral output is obtained by calculation according to an integral coefficient preset threshold value and the deviation between the current temperature and the target temperature at each sampling moment; the temperature control differential output is obtained by calculation according to a differential coefficient preset threshold, the current temperature deviation and the temperature deviation at the last sampling moment;

s34: if a temperature control stopping instruction is received, finishing temperature control; otherwise, step S33 is executed.

Optionally, in the first temperature adjustment phase, controlling a first temperature change rate to adjust the current temperature from the initial temperature to the third temperature includes:

s11: acquiring initial output power of the power element for adjusting the temperature, and taking the initial output power as first output power;

S12: calculating the first temperature change rate according to the temperature at the last sampling moment, the temperature at the current sampling moment and the time difference between the current sampling moment and the last sampling moment;

s13: calculating a first adjusting coefficient according to the first temperature change rate and a first temperature rate preset threshold;

s14: if the first temperature change rate is smaller than or equal to the first temperature rate preset threshold, increasing the first output power according to the first adjusting coefficient and the output stepping threshold; otherwise, reducing the first output power according to the first adjusting coefficient and the output stepping threshold;

s15: judging whether the conditions for entering the second temperature adjusting stage are met or not according to the initial temperature, the target temperature, the current temperature and the third temperature, and if yes, entering the second temperature adjusting stage; otherwise, step S12 is executed.

Optionally, in step S13, the obtaining a first adjustment coefficient according to the first temperature change rate and the first temperature rate preset threshold includes: obtaining the first adjustment coefficient by:

Kv1＝S1_Vmax/V1

wherein Kv1 is the first adjustment coefficient; s1_ Vmax is the first temperature rate preset threshold, V1 is the first temperature rate of change.

Optionally, in step S14, the increasing the first output power according to the first adjustment coefficient and an output step threshold includes: increasing the first output power by:

S1_out＝S1_out+step×Kv1

the reducing the first output power according to the first adjustment coefficient and the output step threshold includes: reducing the first output power by:

S1_out＝S1_out-step×Kv1

wherein S1_ out is the first output power, step is the output step value, and Kv1 is the first adjustment coefficient.

Optionally, in step S15, the determining whether the condition for entering the second temperature adjustment stage is satisfied according to the initial temperature, the target temperature, the current temperature, and the third temperature includes:

when the initial temperature is lower than the target temperature, if the current temperature is higher than or equal to the third temperature, entering a second temperature adjusting stage;

and when the initial temperature is higher than the target temperature, if the current temperature is lower than or equal to the third temperature, entering a second temperature adjusting stage.

Optionally, in the second temperature adjusting stage, controlling a second temperature change rate to adjust the current temperature from the third temperature to the first temperature includes:

S21: taking the first output power of the power element for adjusting the temperature at the end of the first temperature adjusting phase as the second output power;

s22: calculating the second temperature change rate according to the temperature at the last sampling moment and the second output power;

s23: calculating a second adjusting coefficient according to the second temperature change rate and a second temperature rate preset threshold; calculating a third adjusting coefficient according to the second temperature change rate and a third temperature rate preset threshold;

s24: judging whether the second temperature change rate is smaller than or equal to the third temperature rate preset threshold, if so, executing step S25; if not, reducing the second output power according to the third adjusting coefficient and an output stepping threshold;

s25: judging whether the second temperature change rate is greater than or equal to the second temperature rate preset threshold, if so, executing step S26; otherwise, increasing the second output power according to the second adjusting coefficient and the output stepping threshold;

s26: judging whether the conditions for entering the temperature control stage are met or not according to the initial temperature, the target temperature, the current temperature and the second temperature difference threshold value: if yes, entering the temperature control stage to control the temperature; otherwise, go to step S22; and the temperature control stage is an adjusting stage from the first temperature to the second temperature and is maintained within the range of the preset target temperature interval.

Optionally, in step S23, the calculating a second adjustment coefficient according to the second temperature change rate and the second temperature rate preset threshold includes calculating the second adjustment coefficient by the following equation:

Kv2min＝S2_Vmin/V2

calculating a third adjustment coefficient according to the second temperature change rate and a third temperature rate preset threshold, including calculating the third adjustment coefficient by the following formula:

Kv2max＝V2/S2_Vmax

in the formula, Kv2min is the second adjustment coefficient, and S2_ Vmin is the second temperature rate preset threshold; kv2max is the third adjustment coefficient, and S2_ Vmax is the third temperature rate preset threshold; v2 is the second temperature rate of change.

Optionally, in step S24, the reducing the second output power according to the third adjustment coefficient and an output step threshold includes reducing the second output power by:

S2_out＝S2_out-step×Kv2max

in step S25, the increasing the second output power according to the second adjustment coefficient and the output step threshold includes increasing the second output power by:

S2_out＝S2_out+step×Kv2min；

wherein S2_ out is the second output power, step is the output step value, Kv2min is the second adjustment coefficient, and Kv2max is the third adjustment coefficient.

Optionally, in step S26, the determining, according to the initial temperature, the target temperature, the current temperature, and the second temperature difference threshold, whether a condition for entering the temperature control stage is met includes:

when the initial temperature is lower than the target temperature, if the current temperature is lower than or equal to the target temperature plus a temperature value obtained by the first temperature difference threshold value, entering the temperature control stage;

and when the initial temperature is higher than the target temperature, if the current temperature is higher than or equal to a temperature value obtained by subtracting the first temperature difference threshold value from the target temperature, entering the temperature control stage.

In order to achieve the above object, the present invention further provides a temperature control device, including:

a temperature adjusting and speed controlling unit configured to adjust a current temperature from an initial temperature to a first temperature through a first temperature adjusting stage and a second temperature adjusting stage according to a preset temperature adjusting rate rule, a target temperature and a first temperature difference threshold;

a temperature-adjusting temperature-controlling unit configured to adjust the current temperature from the first temperature to a second temperature through the following steps S31-S34; maintaining the current temperature within a preset target temperature range;

Wherein the first temperature and the second temperature are between the initial temperature and the target temperature; the stage initial temperature of the first temperature regulation stage is an initial temperature, the stage target temperature of the first temperature regulation stage and the stage initial temperature of the second temperature regulation stage are both a third temperature, and the stage target temperature of the second temperature regulation stage is the first temperature; the third temperature is between the initial temperature and the first temperature;

in the first temperature adjusting stage, controlling a first temperature change rate to adjust the current temperature from the initial temperature to the third temperature; wherein the first temperature rate of change is less than or equal to the first temperature rate preset threshold;

in the second temperature adjusting stage, controlling a second temperature change rate to adjust the current temperature from the third temperature to the first temperature; the second temperature rate preset threshold is smaller than or equal to the second temperature change rate, and the second temperature change rate is smaller than or equal to a third temperature rate preset threshold;

the temperature control proportion output is obtained by calculation according to the third adjusting coefficient, the current temperature and the target temperature; the temperature control integral output is obtained by calculation according to an integral coefficient preset threshold value and the deviation between the current temperature and the target temperature at each sampling moment; the temperature control differential output is obtained by calculation according to a differential coefficient preset threshold, the current temperature deviation and the temperature deviation at the last sampling moment;

In order to achieve the above object, the present invention further provides a frozen fat-reducing therapeutic apparatus, which adopts the temperature control method as described in any one of the above items or comprises the temperature control device for temperature reduction control.

Compared with the prior art, the temperature control method and device for the medical apparatus and the freezing fat-reducing therapeutic apparatus provided by the invention have the following advantages: according to the temperature control method for the medical instrument, firstly, in a speed control stage, according to a preset temperature regulation rate rule, a target temperature and a first temperature difference threshold value, as well as a first temperature change rate in a first temperature regulation stage and a second temperature change rate in a second temperature regulation stage, the current temperature is regulated to a first temperature from an initial temperature, and the current temperature is maintained within a preset target temperature range. Therefore, the temperature regulation rate can be controlled according to the given temperature limit value according to the first temperature rate preset threshold value and the second temperature rate preset threshold value, the target temperature can be (effectively) approached in a short time, and meanwhile, the violent temperature change is avoided, so that the safety is ensured. Then, regulating the current temperature from the first temperature to a second temperature by a temperature control stage by adopting a PID control algorithm according to the first temperature, the target temperature and a second temperature difference threshold value; and maintaining the current temperature within a preset target temperature range. Thus, when the current temperature approaches the target temperature, the current temperature is maintained (fluctuated) within a certain range of the target temperature for a long time (i.e. the absolute value of the difference between the current temperature and the target temperature is less than or equal to the second temperature difference threshold), and the equilibrium stage of temperature control is entered. With the configuration, the temperature control method for the medical instrument provided by the invention can control different stages according to different parameters, and can improve the safety, comfort and effectiveness of the medical instrument during treatment by controlling the cooling/heating rate before the target temperature is reached.

The temperature control device for the medical apparatus and the therapeutic apparatus provided by the invention belong to the same inventive concept as the temperature control method for the medical apparatus provided by the invention, so the temperature control device at least has the same beneficial effects as the temperature control device, and the detailed description is omitted.

Drawings

FIG. 1 is a general flow diagram of a method for temperature control of a medical device according to one embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a relationship among the initial temperature, the first temperature difference threshold, the second temperature and the second temperature difference threshold when the temperature control method for a medical device according to the present invention is applied to temperature rise control according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a relationship among the initial temperature, the first temperature difference threshold, the second temperature, and the second temperature difference threshold when the temperature control method for a medical device according to the present invention is applied to cool temperature control according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating a speed control phase of a temperature control method for a medical device according to an embodiment of the present invention;

FIG. 5 is a detailed flow chart of one embodiment of a temperature control method for a medical device according to the present invention;

FIG. 6 is a schematic block diagram of the rate control phase and the temperature control phase of FIG. 5, in particular for use in a cryo-liporeduction therapy apparatus;

FIG. 7 is a flowchart illustrating one embodiment of step S1 in FIG. 5;

FIG. 8 is a flowchart illustrating one embodiment of step S2 in FIG. 5;

FIG. 9 is a flowchart illustrating one embodiment of step S3 in FIG. 5;

fig. 10 is a block diagram of a temperature control device according to an embodiment of the present invention.

Wherein the reference numbers are as follows:

100-temperature regulation and speed control unit, 200-temperature regulation and temperature control unit.

Detailed Description

The temperature control method, device and therapeutic apparatus for medical devices according to the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, proportions, sizes, and other elements shown in the drawings and described herein are illustrative only and are not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all modifications, equivalents, and alternatives to those skilled in the art should be construed as falling within the spirit and scope of the invention.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Plural as referred to herein includes the case of two.

Further, it should be noted that if the method described herein comprises a series of steps, and the order of such steps presented herein is not necessarily the only order in which such steps may be performed, some of the described steps may be omitted and/or some other steps not described herein may be added to the method.

The core idea of the invention is to provide a temperature control method, a temperature control device and a therapeutic apparatus for a medical apparatus, so as to solve one or more of the problems of safety, effectiveness and comfort in temperature control of the medical apparatus in the prior art.

It should be noted that, although the present invention is described by taking the fat-reducing cryotherapy apparatus as an example for easy understanding and explanation, as will be understood by those skilled in the art, the temperature control method, apparatus and fat therapy apparatus for medical devices provided in the present invention can also be used for temperature control of other medical devices, such as radio frequency therapy apparatus, whitening cryotherapy apparatus, PCR apparatus and other devices related to temperature control function; furthermore, it can be used in other fields, such as refrigeration equipment, thermostatic control, etc., and the present invention is not limited thereto.

To achieve the above idea, the present invention provides a temperature control method, please refer to fig. 1, which schematically shows a flow chart of the temperature control method according to an embodiment of the present invention. As shown in fig. 1, the temperature control method includes the steps of:

A speed control stage: according to a preset temperature regulation rate rule, a target temperature and a first temperature difference threshold value, regulating the current temperature from the initial temperature to a first temperature through a first temperature regulation stage and a second temperature regulation stage;

specifically, please refer to step S1 in fig. 5 for a specific process of the first temperature adjustment phase, and refer to step S2 in fig. 5 for a specific process of the second temperature adjustment phase, which is not explained first for ease of understanding, description and avoiding redundant description, and specifically, the following related descriptions are given below.

Temperature control stage: adjusting the current temperature from the first temperature to a second temperature; and maintaining the current temperature within a preset target temperature range.

Specifically, please refer to fig. 9 for the specific steps of steps S31-S34, which are not explained here for the convenience of understanding and description and to avoid redundant description, and specifically, the following related descriptions are provided.

In summary, according to the temperature control method for the medical device provided by the present invention, firstly, through the speed control stage, according to the preset temperature adjustment rate rule, the target temperature and the first temperature difference threshold, the current temperature is adjusted from the initial temperature to the first temperature through the first temperature change rate of the first temperature adjustment stage and the second temperature change rate of the second temperature adjustment stage. Therefore, the temperature regulation rate can be controlled according to the given temperature limit value according to the first temperature rate preset threshold value and the second temperature rate preset threshold value, the target temperature is ensured to be (effectively) approached in a short time, and meanwhile, the drastic temperature change is avoided, so that the safety is ensured. Then, the temperature control stage is carried out: adjusting the current temperature from the first temperature to a second temperature by adopting a PID control algorithm according to the first temperature, the target temperature and a second temperature difference threshold value; and maintaining the current temperature within a preset target temperature range. Thus, when the current temperature approaches the target temperature, the current temperature is maintained (fluctuated) within a certain range of the target temperature (for example, the absolute value of the difference from the target temperature is less than or equal to the second temperature difference threshold value) for a long time, and an equilibrium stage of temperature control is entered. With the configuration, the temperature control method for the medical instrument provided by the invention can control different stages according to different parameters, and can improve the safety, comfort and effectiveness of the medical instrument during treatment by controlling the cooling rate before the target temperature is reached.

Specifically, please refer to fig. 2 and fig. 3, wherein fig. 2 is a schematic diagram illustrating a relationship among the initial temperature, the first temperature difference threshold, the second temperature, and the second temperature difference threshold when the temperature control method for a medical device according to the present invention is applied to temperature rise control in one embodiment; fig. 3 is a schematic diagram illustrating a relationship among the initial temperature, the first temperature difference threshold, the second temperature, and the second temperature difference threshold when the temperature control method for a medical device according to the present invention is applied to temperature reduction control in one embodiment. As is evident from fig. 2 and 3: as a preferred embodiment, the speed control stage can control the temperature regulation rate according to a preset temperature regulation rate rule and a given temperature limit value, and is mainly used for effectively and safely regulating the temperature from the initial temperature to the temperature near the target temperature; the temperature control stage is mainly used for controlling the current temperature within a specified range (for example, the absolute value of the difference value with the target temperature is less than or equal to a second temperature difference threshold). Further, in order to control the temperature more effectively, more safely and more reasonably, in practical application, the value of the second temperature difference threshold is preferably much smaller than that of the first temperature difference threshold. It will be apparent, however, to one skilled in the art that the foregoing is merely a description of the preferred embodiments and is not a limitation of the invention, which is not intended to limit the specific values of any of the initial temperature, the first temperature differential threshold, the second temperature, and the second temperature differential threshold.

Preferably, in an exemplary embodiment, referring to fig. 4, fig. 4 is a detailed flowchart of a speed control stage in a temperature control method for a medical device according to an embodiment of the present invention. As can be seen from fig. 4: the operation step of adjusting the current temperature from the initial temperature to the first temperature in the speed control stage comprises the following steps:

s01: and calculating the first temperature according to the target temperature and the first temperature difference threshold value.

Specifically, the first temperature difference threshold is a deviation of the first temperature from the target temperature. When the temperature reduction control is carried out, the first temperature is equal to a temperature value obtained by adding the target temperature to the first temperature difference threshold value; when temperature rise control is carried out, the first temperature is equal to a temperature value obtained by subtracting the first temperature difference threshold value from the target temperature. As will be appreciated by those skilled in the art, the above is merely an exemplary description of the first temperature determination method and is not a limitation of the present invention.

S02: and determining the number of temperature adjusting stages of the speed control stage according to the preset temperature adjusting rate rule, the initial temperature and the first temperature.

Specifically, in one of the exemplary embodiments, the temperature adjustment phase comprises: the initial temperature of the first temperature adjusting stage is the initial temperature, the target temperature of the previous temperature adjusting stage is the initial temperature of the next temperature adjusting stage adjacent to the previous temperature adjusting stage, and the target temperature of the last temperature adjusting stage is the first temperature. Therefore, the temperature ranges of the regulation in the adjacent temperature regulation stages are seamlessly connected, and the effectiveness of temperature control can be further improved. As will be appreciated by those skilled in the art, the above description is merely a description of the preferred embodiment, and in other embodiments, the stage target temperature of the preceding temperature adjusting stage may be greater than the stage initial temperature of the next adjacent temperature adjusting stage, i.e. the temperature ranges of the adjacent temperature adjusting stages have a small amount of overlap, so that the comfort of temperature adjustment may be further improved.

S03: and adjusting the current temperature from the initial temperature of each stage to the target temperature of each stage according to a preset threshold of the stage temperature adjustment rate of each temperature adjustment stage, and entering the next temperature adjustment stage until the initial temperature is adjusted to the first temperature.

Therefore, different temperature adjusting stages and corresponding stage temperature adjusting speed preset thresholds can be set reasonably according to the practical application scene of the specific medical instrument, and the comfort degree of the human body when the medical instrument is applied to the human body is improved.

Preferably, in one of the preferred embodiments, as mentioned above, the number of the temperature regulation stages is 2, namely, the first temperature regulation stage and the second temperature regulation stage; the stage initial temperature of the first temperature regulation stage is the initial temperature, the stage target temperature of the first temperature regulation stage and the stage initial temperature of the second temperature regulation stage are both the third temperature, and the stage target temperature of the second temperature regulation stage is the first temperature; the third temperature is between the initial temperature and the first temperature.

More specifically, please refer to fig. 5 and fig. 6, wherein, fig. 5 schematically shows a detailed flow chart of one embodiment of the temperature control method for the medical device; figure 6 is a schematic block diagram of the speed control phase and temperature control phase of figure 5, particularly for use in a cryo-lipid-lowering therapy apparatus. In fig. 5, steps S1 and S2 correspond to a specific flow of a specific method that adjusts the current temperature from the initial stage temperature to the target stage temperature according to the preset stage temperature adjustment rate of each temperature adjustment stage in step S03, and then enters the next temperature adjustment stage until the initial temperature is adjusted to the first temperature. As can be seen from fig. 5: step S03 includes step S1 and step S2:

S1: in the first temperature adjusting stage, controlling a first temperature change rate to adjust the current temperature from the initial temperature to the third temperature; wherein the first temperature change rate is less than or equal to the first temperature rate preset threshold.

S2: in the second temperature adjusting stage, controlling a second temperature change rate to adjust the current temperature from the third temperature to the first temperature; the second temperature rate preset threshold is smaller than or equal to a second temperature change rate, and the second temperature change rate is smaller than or equal to a third temperature rate preset threshold.

Specifically, please continue to refer to fig. 6, as can be seen from fig. 6, in this embodiment, the entire temperature reduction stage is divided into three stages (as will be understood by those skilled in the art, as mentioned above, the temperature control stage is not limited by the present invention, and may be more than two stages or less than two stages), where step S1 is a first temperature adjustment stage; step S2 is a second temperature adjustment stage, step S3 is a third temperature adjustment stage, step S1 and step S2 are speed control stages, and step S3 is a temperature control stage. The first temperature adjusting stage is adjusted from the initial temperature to a third temperature (0 ℃), and the second temperature adjusting stage is adjusted from the third temperature to the first temperature (the first temperature difference threshold is 2 ℃): i.e., from 0 ℃ to approximately 2 ℃ from the target value; the third temperature adjusting stage adjusts the temperature from the first temperature to the second temperature and maintains the temperature within a preset target temperature range (for example, if the second temperature difference threshold is ± 0.5 ℃, the current temperature pv is maintained within a target temperature range of ± 0.5 ℃).

As one preferred embodiment, please refer to fig. 7, and fig. 7 is a schematic flowchart illustrating a specific process of step S1 in fig. 5. As can be seen from fig. 6 and 7, in step S1, the controlling a first temperature change rate to adjust the current temperature from the initial temperature to the third temperature in the first temperature adjustment phase includes:

s11: the initial output power of the power element for adjusting the temperature is acquired and taken as the first output power S1_ out.

As will be understood by those skilled in the art, the power element includes, but is not limited to, a motor, a temperature control element, etc., and its basic principle is: increasing the output of the power element may increase the speed (rate) of the temperature regulation; reducing the output of the power element may reduce the speed (rate) of the temperature regulation. The detailed process of the specific motor and the temperature control element for adjusting the temperature can be referred to in the prior art, and is not described herein again.

S12: the first temperature change rate V1 is calculated based on the temperature at the last sampling time, the temperature at the current sampling time, and the time difference between the current sampling time and the last sampling time.

Specifically, in one of the preferred embodiments, as will be understood by those skilled in the art, in one of the embodiments, the temperature at the current sampling time may be measured and obtained by a temperature measuring device such as a temperature sensor; in another embodiment, the temperature at the current sampling time may also be obtained according to the output power at the last sampling time, the power at the current sampling time, and the temperature at the last sampling time of the power element for adjusting the temperature, which are calibrated or preset. Further, the temperature at the previous sampling time may be obtained by a temperature measuring device such as a temperature sensor at the previous sampling time, and thus the first temperature change rate is calculated according to a difference between the temperature at the current sampling time and the temperature at the previous sampling time and a time difference between the current sampling time and the previous sampling time.

S13: calculating a first adjustment coefficient Kv1 according to the first temperature change rate V1 and the first temperature rate preset threshold value S1_ Vmax.

Specifically, in one exemplary embodiment, the first adjustment coefficient Kv1 is obtained by the following formula:

Kv1＝S1_Vmax/V1

S14: if the first temperature change rate V1 is less than or equal to the first temperature rate preset threshold value S1_ Vmax, increasing the first output power S1_ out according to the first adjustment coefficient Kv1 and an output Step threshold value Step; otherwise, the first output power S1_ out is decreased according to the first adjustment coefficient Kv1 and the output step threshold step.

As can be understood by those skilled in the art, the output step threshold step may be a preset value, and may also be determined according to a minimum adjustment range of the power element, which is not limited in the present invention.

Specifically, in one of the exemplary embodiments, the first output power S1_ out is increased by:

S1_out＝S1_out+step×Kv1

further, in another exemplary embodiment, the first output power S1_ out is reduced by:

S1_out＝S1_out-step×Kv1

Specifically, in one exemplary embodiment, the determining whether the condition for entering the second temperature adjustment stage is satisfied includes:

and when the initial temperature is lower than the target temperature, if the current temperature is higher than or equal to the third temperature, entering a second temperature adjusting stage.

So configured, the present invention provides a temperature control method for a medical device, in a first temperature adjustment stage, especially when used for cooling control, because the influence on safety and comfort is low, the first temperature rate preset threshold and the first temperature difference threshold of the stage can be set to be wider, thereby further increasing the effectiveness of temperature adjustment.

As another preferred embodiment, please refer to fig. 8, wherein fig. 8 is a schematic flowchart illustrating one embodiment of step S2 in fig. 5. As can be seen from fig. 6 and 8, in step S2, in the second temperature adjustment stage, controlling a second temperature change rate to adjust the current temperature from the third temperature to the first temperature specifically includes:

S21: the first output power S1_ out of the power element for regulating temperature at the end of the first temperature regulation phase is taken as the second output power S2_ out.

S22: and calculating the second temperature change rate V2 according to the temperature at the last sampling moment and the second output power.

Specifically, in one of the preferred embodiments, the second temperature change rate may be obtained by a similar calculation method to that of the first temperature change rate; in another embodiment, the second temperature change rate may also be calculated according to a current temperature obtained by the temperature sensor at the current sampling time, a temperature of a previous sampling time obtained by the temperature sensor at the previous sampling time, and a time difference between the current sampling time and the previous sampling time. It will be understood by those skilled in the art that the present invention is not limited thereto.

S23: calculating a second adjusting coefficient Kv2min according to the second temperature change rate V2 and the second temperature rate preset threshold value S2_ Vmin; and calculating a third adjusting coefficient according to the second temperature change rate and a third temperature rate preset threshold value.

Specifically, in one exemplary embodiment, the second adjustment coefficient may be calculated by:

Kv2min＝S2_Vmin/V2

Preferably, in another exemplary embodiment, the third adjustment coefficient Kv2max may be calculated by the following formula:

Kv2max＝V2/S2_Vmax

in the formula, Kv2min is the second adjustment coefficient, and S2_ Vmin is the second temperature rate preset threshold; kv2max is the third adjusting coefficient, and S2_ Vmax is the third temperature rate preset threshold; v2 is the second temperature rate of change.

S24: judging whether the second temperature change rate V2 is less than or equal to the third temperature rate preset threshold value S2_ Vmax, if yes, executing step S25; if not, the second output power S2_ out is reduced according to the third adjusting coefficient Kv2max and the output stepping threshold step.

Preferably, in one exemplary embodiment, the second output power S2_ out may be reduced by:

S2_out＝S2_out-step×Kv2max

wherein S2_ out is the second output power, step is the output step value, and Kv2max is the third adjustment coefficient.

S25: judging whether the second temperature change rate V2 is greater than or equal to the second temperature rate preset threshold Kv2min, if yes, executing step S26; otherwise, the second output power S2_ out is increased according to the second adjustment coefficient Kv2min and the output step threshold step.

Specifically, in one exemplary embodiment, the second output power S2_ out may be increased by:

S2_out＝S2_out+step×Kv2min；

wherein S2_ out is the second output power, step is the output step value, and Kv2min is the second adjustment coefficient.

S26: judging whether the conditions for entering the temperature control stage are met or not according to the initial temperature, the target temperature, the current temperature and the second temperature difference threshold value: if yes, entering the temperature control stage to control the temperature; otherwise, step S22 is executed.

Specifically, as one of the preferred embodiments, whether the condition for entering the temperature control stage is met can be determined by:

when the initial temperature is lower than the target temperature, if the current temperature is lower than or equal to the target temperature plus a temperature value obtained by the first temperature difference threshold value, entering the condition of the temperature control stage;

With such a configuration, the temperature control method for the medical device provided by the invention has the advantages that in the second temperature regulation stage, particularly in the cooling control, a frostbite event is possible to occur compared with the first temperature regulation stage, and the requirements on safety and comfort are relatively improved. Therefore, the cooling speed is controlled by the second temperature rate preset threshold (the lower limit value of cooling) and the third temperature rate preset threshold (the upper limit value of cooling), and compared with the first temperature regulation stage, the cooling speed is ensured, and meanwhile, the safety is higher; compared with the temperature control stage, the method has better effectiveness while ensuring the safety.

Preferably, in one preferred embodiment, in the temperature control stage, according to the first temperature, the target temperature and the second temperature difference threshold, a second temperature control strategy is adopted to maintain the current temperature within a preset target temperature interval range, and the second temperature control strategy includes adopting a PID control algorithm to maintain the current temperature within the preset target temperature interval range.

Specifically, in an exemplary embodiment, step S3 in fig. 5 corresponds to a temperature control phase, and fig. 9 is a schematic flowchart of one embodiment of step S3 in fig. 5, where the maintaining the current temperature within a preset target temperature interval range by using a PID control algorithm according to the first temperature, the target temperature, and the second temperature difference threshold specifically includes:

s31: and taking the second output power S2_ out of the power element for regulating the temperature at the end of the second temperature regulation phase as a third output power S3_ out.

S32: and calculating a third adjusting coefficient Kp according to the second output power, the target temperature and the current temperature.

Specifically, in one exemplary embodiment, the third adjustment coefficient Kp may be calculated by:

Kp＝S2_out/ek

In the above equation, Kp is the third adjustment coefficient, and S2_ out is the second output power, that is, the output power at the end of the second temperature adjustment phase. ek is the difference between the current temperature and the target temperature, and is calculated by the following formula:

-said current temperature-said target temperature

S33: and calculating the third output power according to the temperature control proportional output, the temperature control integral output and the temperature control differential output.

The temperature control proportional output is obtained by calculation according to the third adjusting coefficient, the current temperature and the target temperature; the temperature control integral output is obtained by calculation according to an integral coefficient preset threshold value and the deviation between the current temperature and the target temperature at each sampling moment; and the temperature control differential output is obtained by calculation according to a differential coefficient preset threshold value, the current temperature deviation and the temperature deviation at the last sampling moment.

Preferably, in one preferred embodiment, the third output power S3_ out may be calculated by the following formula:

S3_out＝Pout+Iout+Dout

wherein S3_ out is the third output power, Pout is the temperature-controlled proportional output, Iout is the temperature-controlled integral output, and Dout is the temperature-controlled differential output.

Specifically, as one of the exemplary embodiments, the temperature control proportional output may be calculated by the following formula:

Pout＝Kp*ek

in the formula, Kp is the third adjustment coefficient, ek is the temperature deviation at the current time, and the temperature deviation at the current time is calculated according to the current temperature and the target temperature. Specifically, in one of the preferred embodiments, the temperature deviation ek at the present time can be calculated by the following formula:

-said current temperature-said target temperature

Further, the temperature controlled integrated output may be calculated by:

Iout＝Ki*Σek：

in the formula, Iout is the temperature control integral output, Ki is the preset threshold of the integral coefficient, and Σ ek is the sum of the deviations between the current temperature and the target temperature at each sampling time.

Further, the temperature controlled differential output may be calculated by:

Dout＝kd*△ek

in the formula, Dout is the temperature control differential output, kd is the preset threshold of the differential coefficient, and Δ ek is obtained by calculation according to the current temperature deviation and the temperature deviation at the last sampling moment. Specifically, Δ ek can be calculated by the following formula:

Δ ek-the current temperature deviation-the temperature deviation at the last sampling instant

S34: if the instruction of stopping temperature control is received, the temperature control is finished; otherwise, step S33 is executed.

With such a configuration, the temperature control method for the medical device provided by the invention can control the temperature within a specified target value range through PID control in the temperature control stage (i.e. the third temperature control stage in fig. 5, i.e. the balance stage of temperature control), so that the temperature fluctuates within a certain range for a long time, thereby further improving the comfort and safety of the medical device during use.

As can be understood by those skilled in the art, in the temperature control method for the medical device provided by the invention, the threshold value of the temperature control rate is set in relation to the effectiveness, comfort and safety of treatment, so that an appropriate threshold value needs to be set. It is clear that the invention is not restricted in this respect. The following will describe this in detail with reference to fig. 6 by taking the cooling control method for the cryo-fat reduction therapy apparatus as an example:

as can be seen from fig. 6, the first temperature control phase and the second temperature control phase are both speed control phases. In the first temperature control stage, the stage target temperature (i.e. the value of the third temperature is 0 ℃, and the current temperature at the end of the first temperature control stage) pv satisfies: the minimum value when pv is greater than or equal to 0 ℃; the objectives of the first temperature control phase are: controlling the first temperature change rate v1 to be less than or equal to the first temperature rate preset threshold value S1_ Vmax; the output associated with the first temperature control stage is the first output power S1_ out of the power element; the coefficient associated with the first temperature control stage is the first adjustment coefficient Kv 1. A second temperature control phase, the phase target temperature (i.e. the first temperature, the current temperature at the end of the second temperature control phase) pv of which satisfies: pv is greater than or equal to sv +2 ℃ and less than or equal to 0 ℃, wherein sv is the target temperature, and 2 ℃ is the first temperature difference threshold; the objectives of the second temperature control phase are: controlling the second temperature change rate to satisfy: the second temperature rate preset threshold S2_ Vmin is less than or equal to the second temperature change rate v2 is less than or equal to the third temperature rate preset threshold S2_ Vmax; the output associated with the second temperature control stage is the output power S2_ out of the power element; the coefficients associated with the second temperature control phase are a second adjustment coefficient Kv2min and a third adjustment coefficient Kv2 max. A third temperature control stage in which a stage target temperature (the current temperature at the time of the third temperature control stage, which is maintained within a preset target temperature interval range) pv satisfies: pv is not less than (sv +0.5 ℃) and not more than (sv-0.5 ℃), wherein sv is the target temperature and 0.5 ℃ is the second temperature difference threshold. The output associated with the third temperature control stage is the output power S3_ out of the power element; the parameters related to the third temperature control stage are temperature control proportional output Pout, temperature control integral output Iout and temperature control differential output Dout.

Therefore, in the first temperature control stage, because the influence on the safety is low, the control parameter (such as the first temperature difference threshold value is 2 ℃ and the first preset) of the stage can be wide, the frostbite event can occur in the second temperature control stage, the cooling rate is limited by the upper and lower speed threshold values, and the safety is ensured while the cooling rate is ensured. And in the third temperature regulation stage, the temperature is controlled by PID after entering the balance stage, so that the temperature fluctuates in a certain range for a long time. With the configuration, the temperature control algorithm for the medical instrument provided by the invention can provide the effectiveness, safety and comfort of the medical instrument without adding any hardware equipment, and the control method is simple and easy to implement.

Corresponding to the temperature control method, another embodiment of the invention further provides a temperature control device. Referring to fig. 10, a block diagram of an embodiment of the invention is schematically shown. As shown in fig. 10, the temperature control apparatus includes a temperature-adjusting and speed-controlling unit 100 and a temperature-adjusting and temperature-controlling unit 200.

Specifically, the temperature adjustment and speed control unit 100: is configured to adjust the current temperature from the initial temperature to the first temperature through a first temperature adjustment phase and a second temperature adjustment phase according to a preset temperature adjustment rate rule, a target temperature and a first temperature difference threshold. The temperature adjusting and controlling unit 200: configured to adjust the current temperature from the first temperature to a second temperature through the steps S31-S34 described above; and maintaining the current temperature within a preset target temperature range. For details of steps S31-S34, please refer to the above description, and for avoiding redundancy, the description is not repeated here.

Wherein the first temperature and the second temperature are between the initial temperature and the target temperature; the stage initial temperature of the first temperature adjusting stage is an initial temperature, the stage target temperature of the first temperature adjusting stage and the stage initial temperature of the second temperature adjusting stage are both third temperatures, and the stage target temperature of the second temperature adjusting stage is the first temperature; the third temperature is between the initial temperature and the first temperature. More specifically, please refer to the above description for details of the first temperature adjustment stage and the second temperature adjustment stage, which are not repeated herein.

Since the principle of temperature control of the temperature control device according to this embodiment is the same as that of the temperature control method according to each of the above embodiments, the description is relatively rough. For details of temperature control, reference may be made to the above description, which is not repeated herein. Further, those skilled in the art can understand that the temperature control device provided by the present invention may further include a power element (such as a motor) for controlling the temperature, a temperature sensor for acquiring the current temperature, a storage unit for storing relevant parameters such as the first temperature difference threshold value and the second temperature difference threshold value, and/or a processor for performing data processing, and details are not repeated herein.

In accordance with the above temperature control method and temperature control device, another embodiment of the present invention further provides a therapeutic apparatus, which uses the temperature control method as described in any one of the above methods or includes the above temperature control device for temperature control. Since the temperature control principle of the therapeutic apparatus provided by this embodiment is the same as the basic principle of the temperature control method and/or temperature control device provided by the above embodiments, the description is relatively rough. For details of the temperature control, reference may be made to the above description, and details of the temperature control are not repeated.

It should be noted that the apparatuses and methods disclosed in the embodiments herein may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments herein. In this regard, each block in the flowchart or block diagrams may represent a module, a program, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, the functional modules in the embodiments herein may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

From the above description of embodiments, it should be apparent to those skilled in the art that the embodiments of the present invention may be provided as a method, apparatus (system), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects and, in many cases, the former embodiment will be preferred.

In summary, compared with the prior art, the invention has the following advantages: according to the temperature control method for the medical instrument, the current temperature is adjusted to the first temperature from the initial temperature by adopting a first temperature control strategy through a speed control stage according to a preset temperature adjusting rate rule, a target temperature and a first temperature difference threshold value. Therefore, the temperature regulation rate can be controlled according to the preset temperature regulation rate rule and the given temperature limit value, so that the target temperature can be approached in a short time (effectively) and the drastic temperature change can be avoided, and the safety is ensured. Then, the temperature control stage is carried out: adjusting the current temperature from the first temperature to a second temperature by adopting a second temperature control strategy according to the first temperature, the target temperature and a second temperature difference threshold; and maintaining the current temperature within a preset target temperature range. Therefore, when the current temperature approaches the target temperature, the current temperature is kept (fluctuated) within a certain range of the target temperature (the difference value with the target temperature is less than or equal to a second temperature difference threshold value) for a long time, and the current temperature enters a temperature control balance section. With the configuration, the temperature control method for the medical instrument provided by the invention can control different stages according to different parameters, and can improve the safety, comfort and effectiveness of the medical instrument during treatment by controlling the cooling rate before the target temperature is reached.

Furthermore, in the description of the present specification, reference to the description of "one embodiment", "some embodiments", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this specification can be combined and combined by those skilled in the art without being mutually inconsistent.

The above description is only for describing the preferred embodiment of the present invention, and it is not intended to limit the scope of the present invention in any way, and any changes and modifications made by those skilled in the art in light of the above disclosure are within the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations fall within the scope of the present invention and its equivalent technology, it is intended that the present invention also include such modifications and variations.

Claims

1. A method of temperature control for a medical device, comprising:

adjusting the current temperature from the initial temperature to a first temperature through a first temperature adjusting stage and a second temperature adjusting stage according to a preset temperature adjusting rate rule, a target temperature and a first temperature difference threshold value;

adjusting the current temperature from the first temperature to a second temperature by steps S31-S34; maintaining the current temperature within a preset target temperature range;

the stage initial temperature of the first temperature regulation stage is an initial temperature, the stage target temperature of the first temperature regulation stage and the stage initial temperature of the second temperature regulation stage are both a third temperature, and the stage target temperature of the second temperature regulation stage is the first temperature; the third temperature is between the initial temperature and the first temperature;

in the first temperature adjusting stage, controlling a first temperature change rate to adjust the current temperature from the initial temperature to the third temperature; wherein the first temperature change rate is less than or equal to a first temperature rate preset threshold;

The steps S31-S34 are as follows:

s32: calculating a third regulating coefficient according to the second output power, the target temperature and the current temperature;

2. The temperature control method of claim 1, wherein said controlling a first rate of temperature change to adjust the current temperature from the initial temperature to the third temperature during the first temperature adjustment phase comprises:

3. The temperature control method according to claim 2, wherein in step S13, the obtaining a first adjustment coefficient according to the first temperature change rate and the first temperature rate preset threshold value includes: obtaining the first adjustment coefficient by:

Kv1＝S1_Vmax/V1

4. The temperature control method according to claim 2, wherein in step S14, the increasing the first output power according to the first adjustment coefficient and an output step threshold comprises: increasing the first output power by:

S1_out＝S1_out+step×Kv1

S1_out＝S1_out-step×Kv1

5. The temperature control method according to claim 2, wherein the determining whether the condition for entering the second temperature adjustment phase is satisfied according to the initial temperature, the target temperature, the current temperature and the third temperature in step S15 includes:

6. The method of claim 1, wherein said controlling a second rate of temperature change to adjust the current temperature from the third temperature to the first temperature during the second temperature adjustment phase comprises:

S25: judging whether the second temperature change rate is greater than or equal to the second temperature rate preset threshold, if so, executing step S26; otherwise, increasing the second output power according to the second regulating coefficient and the output stepping threshold;

7. The temperature control method according to claim 6, wherein in step S23, the calculating a second adjustment coefficient based on the second temperature change rate and the second temperature rate preset threshold value includes calculating the second adjustment coefficient by:

Kv2min＝S2_Vmin/V2

Kv2max＝V2/S2_Vmax

8. The temperature control method according to claim 6, wherein in step S24, the reducing the second output power according to the third adjustment coefficient and an output step threshold includes reducing the second output power by:

S2_out＝S2_out-step×Kv2max

in step S25, the increasing the second output power according to the second adjustment coefficient and the output step threshold includes increasing the second output power by the following equation:

S2_out＝S2_out+step×Kv2min；

in the formula, S2_ out is the second output power, step is the output step value, Kv2min is the second adjustment coefficient, and Kv2max is the third adjustment coefficient.

9. The temperature control method according to claim 6, wherein in step S26, the determining whether the condition for entering the temperature control phase is satisfied according to the initial temperature, the target temperature, the current temperature, and the second temperature difference threshold value includes:

when the initial temperature is lower than the target temperature, if the current temperature is lower than or equal to the temperature value obtained by adding the first temperature difference threshold value to the target temperature, entering the temperature control stage;

10. A temperature control apparatus, comprising:

a temperature adjustment and speed control unit configured to adjust the current temperature from the initial temperature to a first temperature through a first temperature adjustment stage and a second temperature adjustment stage according to a preset temperature adjustment rate rule, a target temperature and a first temperature difference threshold;

11. An apparatus for treatment of the kind described in any one of claims 1 to 9 or comprising a temperature control device according to claim 10 for temperature control.