Sectional type steam generator based on resistance heat and ablation equipment

Abstract

The utility model relates to the technical field of medical instruments, in particular to a sectional type steam generator based on resistance heat and ablation equipment. The sectional type steam generator based on the resistance heat comprises a steam generating part which comprises a steam generating pipe and a steam generating resistance wire, the steam generating pipe makes contact with the steam generating resistance wire to generate heat exchange, and the two ends of the steam generating pipe are provided with a working medium inlet and a steam outlet respectively; and the preheating part is arranged between the steam generation part and the working medium inlet and is suitable for preheating the working medium before flowing into the steam generation pipe. According to the sectional type steam generator based on the resistance heat, working media in the preheating part and the steam generating part can be heated by means of the characteristic that the thermal inertia of the resistance wire is large in a sectional heating mode, so that the steam forming time is shortened, and the steam generator can meet the operation requirement and accurately control generation and stop of steam; and the steam forming time can be greatly shortened, so that the requirements on timeliness and accuracy of ablation treatment are met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a segmented steam generator and ablation equipment based on resistance heat. Background Art

[0002] Thermal steam ablation therapy is a treatment method that uses the energy released by water during the conversion between liquid and hot steam to ablate the location of patient tissue hyperplasia. During the thermal steam ablation treatment procedure, it is usually necessary to first send a catheter that guides steam delivery into the location of the diseased tissue in the human body, and after the catheter reaches the designated location, spray high-temperature steam on the area to be ablated on the diseased tissue. The steam acts on the target tissue through the catheter, and ablates the diseased tissue through high-temperature heating, thereby reducing the volume of the diseased tissue or removing the hyperplasia on the diseased tissue. Thermal steam ablation surgery has the advantages of short treatment time, local anesthesia, less trauma caused by surgery, and can help patients resume normal activities in a short time.

[0003] However, in existing steam ablation treatment devices, the steam generator is usually set in an external device connected to the catheter, and it is difficult for the steam generator to accurately control the generation and stop of steam according to the needs of the operation. In addition, if the steam generation fails to be generated in time when it is needed, or if the steam delivery is not stopped in time when the affected area has reached the required treatment amount, it will cause unnecessary tissue damage to the affected area and have a serious adverse effect on the treatment effect. Utility Model Content

[0004] The utility model provides a segmented steam generator and ablation equipment based on resistive heat, which is used to solve the defect that the steam generator in the prior art is difficult to accurately control the generation and stop of steam according to surgical needs, realizes accurate control of steam generation and stop, and can greatly shorten the steam formation time, so as to meet the timeliness and accuracy requirements of ablation treatment.

[0005] The utility model provides a sectional steam generator based on resistance heat, comprising a steam generating part and a preheating part.

[0006] The steam generating part comprises a steam generating tube and a steam generating resistance wire. The steam generating tube contacts the steam generating resistance wire and generates heat exchange. The two ends of the steam generating tube are respectively provided with a working medium inlet and a steam outlet.

[0007] The preheating part is arranged between the steam generating part and the working medium inlet, and the preheating part is suitable for preheating the working medium before flowing into the steam generating pipe.

[0008] According to a segmented steam generator based on resistance heat provided by the utility model, the preheating part includes a preheating resistance wire and a preheating tube.

[0009] The preheating resistance wire is independent of the steam generating resistance wire.

[0010] A preheating tube is connected to the steam generating tube and the working medium inlet, and the preheating tube contacts the preheating resistance wire to generate heat exchange.

[0011] According to a segmented steam generator based on resistance heat provided by the utility model, the steam generating tube is spirally wound around the steam generating resistance wire.

[0012] According to a segmented steam generator based on resistance heat provided by the utility model, the preheating tube is spirally wound around the preheating resistance wire.

[0013] According to a segmented steam generator based on resistance heat provided by the utility model, the total length of the preheating tube is greater than or equal to the total length of the steam generating tube.

[0014] According to a sectional steam generator based on resistance heat provided by the utility model, the steam generating tube is connected with the preheating tube through a transition tube.

[0015] According to a sectional steam generator based on resistance heat provided by the utility model, the transition tube is a silicone tube or a braided tube.

[0016] According to a sectional steam generator based on resistance heat provided by the utility model, the exteriors of the steam generating part and the preheating part are respectively covered with heat insulating rings.

[0017] A sectional steam generator based on resistance heat provided by the utility model also includes a base and a cover.

[0018] A base is provided, and the steam generating part and the preheating part are respectively installed on the base.

[0019] The cover body can be buckled on the base, and a cavity is formed between the cover body and the base in the buckled state, and the steam generating part and the preheating part are both arranged in the cavity.

[0020] According to a sectional steam generator based on resistance heat provided by the utility model, the exteriors of the steam generating part and the preheating part are respectively covered with heat insulating rings, and the heat insulating rings are located in the cavity.

[0021] According to a sectional steam generator based on resistance heat provided by the utility model, the insulation ring comprises a preheating insulation ring and a steam generating insulation ring, the preheating insulation ring is sleeved outside the preheating part, and the steam generating insulation ring is sleeved outside the steam generating part.

[0022] According to a segmented steam generator based on resistance heat provided by the utility model, a first mounting groove and a second mounting groove are formed in the cavity, the first mounting groove and the second mounting groove are both opened on the base, the steam generating part is fixed in the first mounting groove, and the preheating part is fixed in the second mounting groove; and the side walls of the first mounting groove and the second mounting groove are both located on the inner side of the cover body.

[0023] According to a sectional steam generator based on resistance heat provided by the utility model, a clamping portion is configured on the surface of the base facing away from the cover.

[0024] According to a sectional steam generator based on resistance heat provided by the utility model, the bottom of the base forms a step structure, and the clamping part is formed on the surface of the step structure.

[0025] The utility model also provides an ablation device, which is equipped with the above-mentioned segmented steam generator based on resistance heat.

[0026] The utility model provides a segmented steam generator based on resistance heat, comprising: a steam generating part, including a steam generating tube and a steam generating resistance wire, the steam generating tube contacts with the steam generating resistance wire and generates heat exchange, and the two ends of the steam generating tube are respectively provided with a working medium inlet and a steam outlet; a preheating part, arranged between the steam generating part and the working medium inlet, and the preheating part is suitable for preheating the working medium before it flows into the steam generating tube. The segmented steam generator based on resistance heat can heat the working medium in the preheating part and the steam generating part by segmented heating, utilizing the large thermal inertia of the resistance wire, and adding a preheating part to the steam generating part, so that the working medium is heated to a critical temperature close to evaporation by the preheating part before being heated and evaporated in the steam generating part to form steam, so as to realize preheating before evaporation, shorten the thermal efficiency required for working medium evaporation, shorten the time of steam formation, so as to enable the steam generator to meet the needs of surgery and accurately control the generation and stop of steam, so as to meet the timeliness and accuracy requirements of ablation treatment.

[0027] The utility model also provides an ablation device. By installing the above-mentioned segmented steam generator based on resistance heat in the ablation device, the ablation device has all the advantages of the above-mentioned segmented steam generator based on resistance heat, which will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a structural explosion diagram of a segmented steam generator based on resistance heat provided by the utility model.

[0030] Figure 2 It is a partial structural diagram of a segmented steam generator based on resistance heat provided by the utility model.

[0031] Reference numerals:

[0032] 1: cover; 2: preheating tube; 3: preheating resistance wire; 4: preheating insulation ring; 5: base; 51: first mounting groove; 52: second mounting groove; 53: clamping part; 6: steam generating tube; 7: steam generating resistance wire; 8: steam generating insulation ring; 9: steam outlet pipe; 10: working fluid inlet pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Combine the following Figure 1 and Figure 2 The utility model is described as a segmented steam generator based on resistance heat (referred to as "segmented steam generator" in this embodiment) and an ablation device equipped with the segmented steam generator.

[0035] like Figure 1 and Figure 2 As shown, the segmented steam generator described in this embodiment includes a steam generating part and a preheating part. The steam generating part includes a steam generating tube 6 and a steam generating resistance wire 7. The steam generating tube 6 contacts with the steam generating resistance wire 7 and generates heat exchange. The two ends of the steam generating tube 6 are respectively provided with a working medium inlet and a steam outlet; the preheating part is arranged between the steam generating part and the working medium inlet, and the preheating part is suitable for preheating the working medium before flowing into the steam generating tube 6. The working medium described in this embodiment is water for generating steam, and can also be other materials that can generate steam and are required in the medical process.

[0036] After the working medium enters the steam generating tube 6, it is evenly heated by the steam generating resistance wire 7, evaporates to form steam, and is ejected to act on the affected area. The preheating unit can preheat the working medium to the critical temperature of evaporation or close to the critical temperature before entering the steam generating unit, shortening the time required for the working medium to evaporate, improving the evaporation efficiency, and effectively improving the steam generation efficiency and the adaptability and timeliness of the opening and closing of the device.

[0037] It can be seen that the segmented steam generator based on resistance heat can heat the working fluid in the preheating part and the steam generating part by segmented heating, utilizing the large thermal inertia of the resistance wire, and add a preheating part to the steam generating part, so that the working fluid is first heated to a critical temperature close to evaporation by the preheating part before being heated and evaporated to form steam in the steam generating part, so as to achieve preheating before evaporation, shorten the thermal efficiency required for evaporation of the working fluid, shorten the time for steam formation, so as to enable the steam generator to meet the needs of surgery and accurately control the generation and stopping of steam, so as to meet the requirements of timeliness and accuracy of ablation treatment.

[0038] In some embodiments, Figure 2 As shown, the preheating part includes a preheating resistance wire 3 and a preheating tube 2. The preheating resistance wire 3 and the steam generating resistance wire 7 are independent of each other. The preheating tube 2 connects the steam generating tube 6 with the working medium inlet, and the preheating tube 2 contacts the preheating resistance wire 3 and generates heat exchange. The preheating resistance wire 3 and the steam generating resistance wire 7 are respectively connected to two sets of circuits, and two sets of independent control circuits respectively control the operation of the two resistance wires, which can flexibly adjust the power of the resistance wire, and then timely regulate the heating temperature of the working medium in the working medium pipeline.

[0039] It should be noted that the resistance wire described in the embodiment of the utility model includes the above-mentioned steam generating resistance wire 7 and preheating resistance wire 3. The working fluid pipeline includes the above-mentioned steam generating tube 6 and preheating tube 2, and also includes the following transition tube (not shown in the figure) connected between the steam generating tube 6 and the preheating tube 2, as well as the working fluid inlet tube 10 connected to the working fluid inlet and the steam outlet tube 9 connected to the steam outlet. The working fluid inlet tube 10, the preheating tube 2, the transition tube, the steam generating tube 6 and the steam outlet tube 9 are connected between the working fluid inlet and the steam outlet to form a working fluid passage. The sterile water described in this embodiment flows in the entire working fluid passage as a working fluid, and is heated in the preheating tube 2 to within the critical temperature, usually below 100 degrees Celsius, because water above 100 degrees Celsius evaporates to form steam. It is further preferred that the critical temperature range of the working fluid is 90 degrees Celsius to 100 degrees Celsius. The working fluid in the preheating tube 2 is preheated to a critical temperature range before the treatment mode, thereby reducing the energy and time required to convert water into water vapor; then, after receiving the instruction that high-temperature steam ablation is required at the affected area, the preheated liquid water enters the steam generating tube 6 and quickly evaporates to form water vapor, which is then quickly ejected. The steam generation efficiency of this process is high, and it can meet the high-speed steam generation and immediate stop of steam generation required in the hot steam ablation surgery, achieving high timeliness of executing instructions and low power required for steam generation, which has great clinical significance and economic value.

[0040] In some embodiments, in order to improve the uniformity and timeliness of heating of the working medium pipeline by the resistance wire, the steam generating tube 6 and the preheating tube 2 are preferably spirally wound around the steam generating resistance wire 7 and the preheating resistance wire 3, respectively, that is, the steam generating tube 6 is spirally wound around the steam generating resistance wire 7; the preheating tube 2 is spirally wound around the preheating resistance wire 3. The length of the preheating tube 2 should be set to be relatively long according to the limited structural space. The longer it is, the lower the required power of the preheating resistance wire 3. Generally speaking, the total length of the preheating tube 2 is greater than or equal to the total length of the steam generating tube 6, so that the working medium in the working medium pipeline is heated evenly and the heating power of the resistance wire is reduced as much as possible. Relatively speaking, the length of the steam generating tube 6 is as short as possible, preferably the length of the steam generating tube 6 is shorter than the length of the preheating tube 2, and preferably the length of the steam generating tube 6 is as small as possible, so as to improve the heating efficiency as much as possible, achieve rapid heating, and the subsequent cooling process is also fast, because the small length of the steam generating tube 6 corresponds to a small volume, and the heat stored inside the pipeline is small, so as to achieve the efficient response timeliness of fast steam start and stop. When the treatment is completed or the treatment is temporarily stopped, the steam generation can be stopped in time. The working medium pipeline is preferably a copper capillary tube with an inner diameter not greater than 1 mm, so as to be conveniently wound on the resistance wire.

[0041] In some embodiments, the above-mentioned transition pipe connects the steam generating pipe 6 and the preheating pipe 2. The transition pipe is a silicone tube or a braided tube, which plays a heat insulation role to reduce the heat loss of the working medium in the transition pipe.

[0042] It should be noted that, in the embodiment of the utility model, the steam generating resistance wire 7 is used to provide the heat energy required for evaporation of the working medium in the steam generating tube 6 from liquid to gas. According to actual use, the steam generating resistance wire 7 can also be operated at low power, that is, in the standby state of the segmented steam generator, the steam generating part also produces the same preheating effect as the preheating part, and provides preheating heat energy for the working medium that has stayed in the steam generating tube 6, so that the working medium is always kept in the critical temperature range close to evaporation, preferably, the critical temperature range is above 90 degrees Celsius and below 100 degrees Celsius, so as to avoid the working medium in the steam generating tube 6 from being unable to regenerate steam immediately due to heat loss, and also avoid the backflow of high-temperature working medium affecting the working medium temperature in the preheating tube 2, and also avoid the working medium temperature in the steam generating tube 6 and the preheating tube 2 from changing too fast and too much, causing unnecessary energy waste.

[0043] In some embodiments, Figure 1 As shown, the segmented steam generator also includes a base 5 and a cover 1. The steam generating part and the preheating part are respectively installed on the base 5. The cover 1 can be buckled on the base 5, and a cavity is formed between the cover 1 and the base 5 in the buckled state, and the above-mentioned steam generating part and the preheating part are both arranged in the cavity. The cover 1 and the base 5 in the buckled state can protect the above-mentioned steam generating part and the preheating part in the cavity formed by the buckling of the two, play a role in heat preservation, heat insulation and protection of the steam generating part and the preheating part, and also play a protective role for the user to avoid being scalded by high-temperature steam.

[0044] In some specific embodiments, the cover 1 and the base 5 are preferably made of heat-insulating and easily moldable materials, and the heat-insulating and easily moldable materials can be Teflon (PTFE) or FR-4 flame-resistant materials. The cover 1 and the base 5 in the buckled state can form a wrapped shell outside the preheating part and the steam generating part, effectively avoiding heat loss and reducing the surrounding temperature to prevent burns during operation, and can be fixed with other structural parts.

[0045] In some specific embodiments, based on the above structure, the outside of the steam generating part and the preheating part are respectively provided with heat insulation rings, which are located in the cavity. The heat insulation rings are preferably made of high temperature resistant ceramic fiber paper, which play a role in high temperature resistance and heat insulation for the steam generating part or the preheating part wrapped in the heat insulation ring, which can prevent the heat loss of the high temperature working fluid, and can also form an inner and outer double-layer heat insulation structure with the cover body 1 and the base 5 in the buckled state, further improving the utilization efficiency of thermal energy and improving the safety of use, and effectively preventing operators from being scalded.

[0046] In some specific embodiments, Figure 2 As shown, a first mounting groove 51 and a second mounting groove 52 are formed in the above-mentioned cavity, and the first mounting groove 51 and the second mounting groove 52 are both opened on the base 5. The steam generating part is fixed in the first mounting groove 51, and the preheating part is fixed in the second mounting groove 52; and the side walls of the first mounting groove 51 and the second mounting groove 52 are both located on the inner side of the cover body 1. Preferably, the cover body 1 is preferably in an inverted U-shaped structure and is buckled on the base 5, and can be tightly buckled with the base 5, then the side walls of the cover body 1 in the buckled state are located outside the side walls of the first mounting groove 51 and the second mounting groove 52, and the side walls of the first mounting groove 51 and the second mounting groove 52 are used as the first layer of protective insulation for the preheating part and the steam generating part, respectively, and the side walls of the cover body 1 form the second layer of protective insulation for the preheating part and the steam generating part. Preferably, a distance is separated between the first mounting groove 51 and the second mounting groove 52 to ensure that the steam generating part and the preheating part do not interfere with each other.

[0047] It should be noted that if Figure 2 As shown, the first installation groove 51 and the second installation groove 52 can be constructed into a box-shaped structure with an open top, which is convenient for disassembling and assembling the components inside, so as to achieve more efficient and convenient maintenance and replacement of the steam generating part or the preheating part. The bottom of the side wall of the box-shaped structure is fixed to the base 5, and can be sleeved in the cover body 1 in the buckled state, that is, the side wall of the box-shaped structure extends outward from the base 5, and its extended end faces the cover body 1 in the buckled state, so as to further form a layer of heat insulation wall inside the cover body 1.

[0048] In this embodiment, the steam generation insulation ring 8 is mounted outside the steam generation part, and the steam generation part is installed in the first installation groove 51 together with the steam generation insulation ring 8; the preheating insulation ring 4 is mounted outside the preheating part, and the preheating part is installed in the second installation groove 52 together with the preheating insulation ring 4. This structural setting enables the steam generation part and the preheating part to have at least two layers of insulation structure layers, which greatly reduces heat loss and improves safety in use.

[0049] In order to make it more convenient for the operator to fix the segmented steam generator for ablation surgery, a clamping portion 53 is configured on the surface of the base 5 facing away from the cover 1. A step structure is configured on the side of the base 5 facing away from the cover 1, and the clamping portion 53 is formed on the step structure, so that the clamping device can clamp and fix the step-shaped clamping portion 53, thereby fixing the segmented steam generator as a whole, preventing shaking, and improving surgical accuracy and operating convenience.

[0050] The specific use process of the segmented steam generator described in this embodiment is taken as a steam generation method. The steam generation method is described in detail below and is applicable to the segmented steam generator described above.

[0051] In this embodiment, the steam generation method includes the following steps.

[0052] The working mode of the above-mentioned segmented steam generator is obtained, and the working mode includes a preheating mode and a treatment mode.

[0053] When the working mode is the preheating mode, the preheating resistor wire 3 of the segmented steam generator is controlled to generate heat so as to preheat the working medium in the preheating tube 2 of the segmented steam generator.

[0054] When the working mode is the treatment mode, the steam generating resistor wire 7 of the segmented steam generator is controlled to heat up so that the working medium in the steam generating tube 6 of the segmented steam generator is heated and vaporized for the second time; and the preheating resistor wire 3 is controlled to maintain the state in the preheating mode.

[0055] Since the steam generating method is performed using the above-mentioned segmented steam generator, the steam generating method has all the advantages of the above-mentioned segmented steam generator, and the similarities are not repeated here one by one.

[0056] On this basis, since the steam generating method has a preheating mode and a treatment mode, the user can select the corresponding working mode at any time according to the needs of the treatment of the affected area. The preheating resistance wire 3 can be used to continuously preheat the working medium in the preheating tube 2 before and during treatment, so that the working medium entering the steam generating tube 6 is in a critical temperature range close to vaporization but not directly vaporized. Therefore, in the treatment mode, the steam generating resistance wire 7 can be relied on to heat the working medium entering the steam generating tube 6 from the preheated temperature to the maximum value of the critical temperature range faster and more efficiently, thereby being able to meet the needs of the operation and accurately control the generation and stopping of steam to meet the timeliness and accuracy requirements of ablation treatment, greatly optimizing the steam generation process and extending the service life of the steam generator.

[0057] In some embodiments, when the working mode is the preheating mode, the preheating resistor wire 3 of the segmented steam generator is controlled to heat up to preheat the working medium in the preheating tube 2 of the segmented steam generator, further including the following contents (the execution order of the following contents is not in particular order).

[0058] The driving device of the above-mentioned segmented steam generator drives the working medium to flow from the preheating tube 2 to the steam generating tube 6.

[0059] The preheating resistor wire 3 is controlled to continuously heat the working medium flowing through the preheating tube 2 so that the working medium temperature at the outlet of the preheating tube 2 is maintained within the critical temperature range.

[0060] The steam generating resistor 7 is controlled to heat the working medium flowing through the steam generating tube 6 with preheating power, so that the working medium temperature in the steam generating tube 6 is maintained within the critical temperature range; or, the steam generating resistor (7) is controlled to be in a closed state.

[0061] It should be noted that, in this embodiment, sterile water is used as the working fluid, and the critical temperature range is 90 degrees Celsius to 100 degrees Celsius (excluding 100 degrees Celsius). This is because the boiling point and evaporation temperature of water are 100 degrees Celsius. Therefore, in this embodiment, the working fluid evaporation temperature is used as the highest value of the critical temperature range, and the critical temperature range is extended downward by at least 10 degrees Celsius.

[0062] It should be noted that the preheating power of the steam generating resistance wire 7 of this embodiment is lower than the maximum power of the steam generating resistance wire 7. The preheating power of the steam generating resistance wire 7 heats the steam generating tube 6 but does not heat the working medium in the steam generating tube 6 to the evaporation temperature point, thereby making the working medium in the steam generating tube 6 also in a preheating and heat preservation state.

[0063] It should be noted that, under the thrust of the propulsion device, the working medium flows from the preheating tube 2 to the steam generating tube 6. This process can continue to exist in the preheating mode; it can also continue to exist in all working modes. That is, the process of the working medium flow can exist in at least one working mode.

[0064] In this embodiment, the preheating part in the preheating mode is in a state of preheating and heat preservation for the working fluid in the working fluid pipeline, and the working fluid is kept flowing continuously along the working fluid pipeline. The working fluid continuously flows through the preheating part and the steam generating part and continues to heat up and maintains in the critical temperature range. Preferably, the steam generating part in the preheating mode can be in a closed state, which is generally suitable for the device to be in a standby power saving state, and only the low-power operation of the preheating resistor wire 3 is used to achieve the effect of maintaining the temperature of the working fluid in the working fluid pipeline. Preferably, the steam generating part in the preheating mode can also be in a state of preheating and heat preservation for the working fluid in the working fluid pipeline, and the steam generating resistor wire 7 is operated at a preheating power lower than the maximum power, so that it can preheat and heat the working fluid together with the preheating resistor wire 3, which can ensure that the working fluid in the working fluid pipeline has a better preheating and heat preservation effect, and avoid the temperature change difference being too large to affect the working state of the treatment mode.

[0065] In some embodiments, when the working mode is the preheating mode, the preheating resistor wire 3 of the segmented steam generator is controlled to heat up to preheat the working medium in the preheating tube 2 of the segmented steam generator, further including the following contents (the execution order of the following contents is not in particular order).

[0066] The control push device pushes the working medium flow with a constant thrust, so that the working medium in the preheating tube 2 continuously enters the steam generating tube 6, and the working medium in the steam generating tube 6 is released outward from the steam outlet under pressure. Since the steam generating part in the preheating mode continuously releases a small amount of steam or liquid working medium outward along with the flow of the working medium, the working medium and body fluid are effectively prevented from being sucked back into the working medium pipeline, thereby avoiding pipeline blockage.

[0067] The preheating resistor 3 and the steam generating resistor 7 are controlled to maintain constant power operation. Constant power means that the operating power of the preheating resistor 3 and the steam generating resistor 7 is always at a constant value, especially the preheating resistor 3 of the preheating part generates heat at a constant power and exchanges heat with the preheating tube 2, so that the temperature of the working fluid can show a linear temperature change during the flow of the working fluid in the preheating tube 2. In the preheating mode, the preheating tube 2 and the steam generating tube 6 are at a constant power, ensuring that the sterile water in the working fluid pipeline is in a preheated state, and can also provide a constant pressure to the working fluid pipeline, and the steam generating part can continuously release a small amount of steam to prevent the tissue fluid from being sucked back and causing the affected tissue to be sucked into the puncture needle, resulting in blockage of the pipeline.

[0068] In some embodiments, the above-mentioned control preheating resistor wire 3 continuously heats the working medium flowing through the preheating tube 2 so that the working medium temperature at the outlet of the preheating tube 2 is maintained within the critical temperature range, further comprising: if the working medium temperature at any position in the preheating tube 2 reaches the highest value in the critical temperature range, the working medium flowing through the preheating tube 2 is cooled; and / or, normal temperature working medium is added to the preheating tube 2. This process can timely control the working medium temperature in the preheating tube 2 within the critical temperature range, and will not cause the working medium to vaporize and generate steam in the preheating tube 2 in advance, thereby avoiding the generation of excessive steam.

[0069] In some specific embodiments, if the working medium temperature at any position in the preheating tube 2 reaches the highest value in the critical temperature range, the working medium flowing through the preheating tube 2 is cooled; and / or, normal temperature working medium is added to the preheating tube 2, further including: reducing the operating power of the preheating resistor 3 or controlling the preheating resistor 3 to stop running, so as to cool the working medium flowing through the preheating tube 2; and / or, increasing the thrust of the pushing device, so as to increase the flow rate of the working medium in the preheating tube 2. Increasing the thrust of the pushing device can increase the flow rate of the working medium, and then use the normal temperature working medium to squeeze the high temperature working medium in the preheating tube 2 out of the preheating tube 2, so that the high temperature working medium quickly enters the steam heating tube 6, so that the working medium in the preheating tube 2 can be cooled quickly and efficiently.

[0070] In some embodiments, when the working mode is the treatment mode, the steam generating resistance wire 7 of the segmented steam generator is controlled to heat up so that the working medium in the steam generating tube 6 is heated and vaporized for the second time; and the preheating resistance wire 3 is controlled to maintain a state in the preheating mode, further including the following contents (the execution order of the following contents is not in particular order).

[0071] The driving device is controlled to drive the working medium to flow from the preheating tube to the steam generating tube.

[0072] The preheating resistor wire 6 is controlled to continuously heat the working medium flowing through the preheating tube 2 so that the working medium temperature at the outlet of the preheating tube 2 is maintained within the critical temperature range.

[0073] The steam generating resistor 7 is controlled to heat the working medium flowing through the steam generating tube 6 at maximum power, so that the working medium temperature in the steam generating tube 6 reaches at least the highest value of the critical temperature range, thereby causing the steam generating tube 6 to release steam outward from the steam outlet.

[0074] In this embodiment, the segmented steam generator exchanges heat with the working medium in the steam generating tube 6 through the steam generating resistor 7 of the steam generating part in the treatment mode, so that the working medium is heated and vaporized into steam in the steam generating tube 6. Since the steam outlet of the working medium pipeline receives the instruction to spray steam outward, the preheating part completes the above-mentioned preheating mode in advance, thereby preheating the working medium in the preheating tube 2 to a specified critical temperature range; at the same time, the steam generating resistor 6 operates at maximum power; and then the preheated working medium is pushed into the steam generating tube 6 by a syringe, and the liquid working medium vaporizes in the steam generating tube 6 and becomes steam and is sprayed out from the steam outlet.

[0075] It should be noted that in order to ensure that the steam is continuously generated and has excellent steam control timeliness, which is instant on and instant off, in the steam generation method of this embodiment, the steam generating resistor wire 7 in the treatment mode is in operation, and the preheating resistor wire 3 is synchronously still in the above-mentioned preheating mode operation state, that is, the preheating resistor wire 3 is controlled to continuously heat the working medium flowing through the preheating tube 2, so that the working medium temperature at the outlet of the preheating tube 2 is maintained within the critical temperature range. This setting can ensure that in the treatment mode, the working medium flowing into the steam generating tube 6 is always maintained at a high temperature state after preheating, that is, maintained within the critical temperature range, thereby effectively avoiding the defect of excessive delay in steam generation and stopping caused by excessive thermal inertia of the heating resistor wire, and then being able to meet the needs of surgery and accurately control the generation and stopping of steam to meet the timeliness and accuracy of ablation treatment.

[0076] In some embodiments, the above-mentioned working mode also includes a cooling and rehydration mode. Therefore, the steam generation method described in this embodiment further includes: when the working mode is the cooling and rehydration mode, the working fluid of the preheating tube 2 after cooling is controlled to fill the steam generating tube 6, and the steam generating tube 6 is controlled to cool down. This setting can realize the timely and rapid cooling of the steam generating tube 6 after the treatment mode to avoid the device from generating excessive steam. In some specific embodiments, after executing the treatment mode, the cooling and rehydration mode is executed to fill the steam generating tube 6 with the working fluid of the preheating tube 2 after cooling, and the steam generating tube 6 is controlled to cool down, further including the following contents (the execution order of the following contents is not in particular order).

[0077] The operating power of the preheating resistor 3 is controlled to be reduced or the preheating resistor 3 is controlled to stop working, so that the working medium flowing through the preheating tube 2 is cooled to room temperature.

[0078] The operating power of the steam generating resistance wire 6 is controlled to be reduced or the steam generating resistance wire 6 is controlled to stop working, so that the steam generating pipe 6 stops releasing steam from the steam outlet.

[0079] The control pushing device pushes the working medium in the preheating tube 2 to fill the steam generating tube 6.

[0080] The steam generation method described in this embodiment adds the above-mentioned cooling and rehydration mode, so that after the steam generation is completed, the control unit can promptly control the propulsion device to propel the cooled working fluid in the preheating tube 2 to accelerate forward, thereby quickly replenishing the working fluid below the critical temperature range in the preheating tube 2 into the steam generating tube 6, so as to quickly and timely cool the steam generating tube 6 and replenish the working fluid for the steam generating tube 6, thereby ensuring that the segmented steam generator can switch back to the preheating mode after the steam stops.

[0081] It should be noted that the switching of the working mode of the segmented steam generator can be manual or automatic according to the temperature detection results of the preheating tube 2 and the steam generating tube 6. The switching method can be that the external treatment button triggers the input mode switching instruction, or the control unit can automatically judge and automatically switch based on the temperature detection result.

[0082] In some embodiments, the present invention further provides an ablation device, which is equipped with the above-mentioned segmented steam generator. By installing the above-mentioned segmented steam generator based on resistance heat in the ablation device, the ablation device has all the advantages of the above-mentioned segmented steam generator based on resistance heat, which will not be described one by one here.

[0083] In some embodiments, the ablation device further comprises a pushing device. The pushing device is connected to the control unit of the segmented steam generator as described above. Under the control of the control unit, the pushing device can push the working fluid in the working fluid pipeline to continuously flow from the preheating tube 2 to the steam generating tube 6. The control unit can control the thrust of the pushing device, thereby timely changing the flow rate and flow rate of the working fluid in the working fluid pipeline. In this embodiment, the pushing device is preferably a syringe.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A segmented steam generator based on resistance heat, characterized in that: include: The steam generating part comprises a steam generating tube and a steam generating resistance wire, wherein the steam generating tube contacts with the steam generating resistance wire and generates heat exchange, and the two ends of the steam generating tube are respectively provided with a working medium inlet and a steam outlet; The preheating part is arranged between the steam generating part and the working medium inlet, and the preheating part is suitable for preheating the working medium before flowing into the steam generating pipe.

2. The segmented steam generator based on resistance heat according to claim 1, characterized in that: The preheating unit comprises: A preheating resistance wire, which is independent of the steam generating resistance wire; A preheating tube is connected to the steam generating tube and the working medium inlet, and the preheating tube contacts the preheating resistance wire to generate heat exchange.

3. The segmented steam generator based on resistance heat according to claim 2, characterized in that: The steam generating tube is spirally wound around the steam generating resistance wire.

4. The segmented steam generator based on resistance heat according to claim 2, characterized in that: The preheating tube is spirally wound around the preheating resistance wire.

5. The segmented steam generator based on resistance heat according to claim 2, characterized in that: The total length of the preheating tube is greater than or equal to the total length of the steam generating tube.

6. The segmented steam generator based on resistance heat according to claim 2, characterized in that: The steam generating tube is connected to the preheating tube via a transition tube.

7. The segmented steam generator based on resistance heat according to claim 6, characterized in that: The transition tube is a silicone tube or a braided tube.

8. The segmented steam generator based on resistance heat according to any one of claims 1 to 7, characterized in that: The steam generating part and the preheating part are respectively covered with heat insulating rings on their exteriors.

9. The segmented steam generator based on resistance heat according to any one of claims 1 to 7, characterized in that: Also includes: A base, on which the steam generating part and the preheating part are respectively mounted; The cover body can be buckled on the base, and a cavity is formed between the cover body and the base in the buckled state, and the steam generating part and the preheating part are both arranged in the cavity.

10. The segmented steam generator based on resistance heat according to claim 9, characterized in that: The outsides of the steam generating part and the preheating part are respectively covered with heat insulation rings, and the heat insulation rings are located in the cavity.

11. The segmented steam generator based on resistance heat according to claim 10, characterized in that: The insulation ring comprises a preheating insulation ring and a steam generating insulation ring. The preheating insulation ring is sleeved outside the preheating part, and the steam generating insulation ring is sleeved outside the steam generating part.

12. The segmented steam generator based on resistance heat according to claim 9, characterized in that: A first mounting groove and a second mounting groove are formed in the cavity, and the first mounting groove and the second mounting groove are both opened on the base, the steam generating part is fixed in the first mounting groove, and the preheating part is fixed in the second mounting groove; and the side walls of the first mounting groove and the second mounting groove are both located on the inner side of the cover body.

13. The segmented steam generator based on resistance heat according to claim 9, characterized in that: A clamping portion is configured on a surface of the base facing away from the cover.

14. The segmented steam generator based on resistance heat according to claim 13, characterized in that: A side of the base facing away from the cover body is configured with a step structure, and the clamping portion is formed on the step structure.

15. An ablation device, characterized in that: A segmented steam generator based on resistance heat as described in any one of claims 1 to 14 is installed.

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