Wound dressing device and use method thereof

Abstract

The invention relates to the technical field of wound dressing, and discloses a wound dressing device which comprises a constant-temperature positioning bin, a constant-temperature cavity is formed in a cylindrical shell, a constant-temperature interlayer is arranged on the side wall of the cylindrical shell, a butt joint groove is formed in the bottom of the cylindrical shell, and a central area is arranged in the geometric center area of the constant-temperature cavity; the modular wound dressing is detachably connected to the bottom of the constant-temperature positioning bin through a magnetic attraction buckle connector in the butt joint groove, and a material conveying channel and a material pumping channel are preset in the modular wound dressing; the material conveying spray head and the material pumping spray head are arranged in a nested concentric circular ring mode, the material pumping ring is strictly located under the material conveying ring, point-to-point precise recovery is formed, a negative pressure field completely covers a material conveying jet flow boundary layer, the waste liquid capturing efficiency is improved, liquid flow cross interference and vortex of a traditional device are eliminated, and the waste liquid capturing effect is improved. The optimized structure ensures that the fluid keeps stable laminar flow (optimal working interval) at low flow speed, and the flushing damage of turbulent flow to new tissues is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical wound dressing, in particular to a wound dressing device and a using method thereof. BACKGROUND

[0002] Wound dressing is the core tool for modern medicine to treat wounds, burns and chronic wounds. Its function has developed from the traditional physical barrier to the composite material with antibacterial, healing and environment regulation. According to the mechanism, the dressing can be divided into passive type (such as gauze), interactive type (such as hydrogel, foam dressing) and bioactive type (such as silver ion containing, calcium alginate intelligent dressing). Passive dressing only provides basic protection, but the ability to manage exudate is limited; interactive dressing promotes epithelialization by absorbing exudate and maintaining a moist environment, but it needs to be replaced frequently, and the cleaning effect on complex wounds is insufficient; bioactive dressing further optimizes the healing process by loading drugs or growth factors, but its cleaning function still depends on external operation, and it is difficult to achieve dynamic and accurate waste liquid recovery.

[0003] In the prior art, wound cleaning mainly relies on the following methods: traditional dressing replacement: absorb exudate through gauze or cotton pad, and need to be replaced frequently to avoid liquid accumulation and infection. However, this method can only passively absorb, cannot actively remove waste liquid, and is easy to cause local liquid flow retention, increasing the risk of bacterial growth; pulsatile irrigation and ultrasonic debridement: pulsatile irrigation removes contaminants by high-pressure water flow, but is only suitable for initial debridement of acute wounds; ultrasonic debridement can fragment necrotic tissue through cavitation effect, but needs to be combined with manual operation, and it is difficult to accurately control the damage to living tissue; closed drainage system: some dressings have built-in drainage channels, but their structure is mostly designed in a single direction, making it difficult to cover complex areas of the wound. For example, when ointment is used as a drainage medium, the absorption capacity of the external dressing is limited, and waste liquid is easy to accumulate at the edge of the wound, affecting healing.

[0004] The significant defect of the prior art is the low cleaning efficiency. On the one hand, traditional dressings rely on passive absorption, and the waste liquid recovery path is long, leading to local pressure imbalance and even secondary damage; on the other hand, active cleaning devices (such as pulsatile irrigation) lack precise control of waste liquid flow field, which is easy to produce liquid flow cross interference or vortex, destroying the microenvironment of the wound. For example, in diabetic wound or burn models, waste liquid retention can accelerate the accumulation of reactive oxygen species and inhibit angiogenesis, and the prior art is difficult to achieve real-time and directional removal of waste liquid. In addition, most devices do not consider the fluid dynamics characteristics, and high-speed jet flow may induce turbulent flow, causing mechanical damage to the newly formed tissue, while low-speed flow is difficult to completely recover waste liquid due to insufficient viscous force.

[0005] In summary, the current wound cleaning technology has significant deficiencies in the efficiency, accuracy and fluid stability of waste liquid recovery, and it is urgent to solve the problems of liquid flow interference, incomplete recovery and tissue damage through structural innovation and fluid field optimization. SUMMARY

[0006] (I) Technical problems solved In view of the deficiencies of the prior art, the present application provides a wound dressing device with excellent wound cleaning efficiency and precise and intelligent constant temperature management advantages.

[0007] (II) Technical solutions In order to achieve the above-mentioned fluid field optimization purpose, the present application provides the following technical solutions: a wound dressing device, comprising: The constant temperature positioning bin is provided with a constant temperature cavity in the cylindrical shell, a constant temperature interlayer in the side wall, and a butt joint groove in the bottom, and the geometric center area of the constant temperature cavity is provided with a central area; The modular wound dressing is detachably connected to the bottom of the constant temperature positioning bin through the magnetic suction buckle interface inside the butt joint groove, and the inside is provided with a pre-set material conveying channel and a material pumping channel; The fixed skin-friendly patch is made of medical polyurethane and is annularly arranged on the outer wall of the bottom of the constant temperature positioning bin; The wound cleaning mechanism comprises: The material conveying unit comprises a central material conveying disc, a nested aluminum alloy annular material conveying pipe, a material conveying connecting pipe, a vertically arranged bottom material conveying pipe, a stainless steel material conveying nozzle and a central material conveying pipe; The material pumping unit comprises a central material pumping disc, a nested aluminum alloy annular material pumping pipe, a material pumping connecting pipe, a vertically arranged bottom material pumping pipe, a stainless steel material pumping nozzle and a central material pumping pipe; The constant temperature optimization unit comprises an S-shaped aluminum-magnesium alloy constant temperature coil pipe covering the bottom material conveying pipe and a spiral copper pipe in the preheating cylindrical bin; The detachable sensor module is arranged at the bottom center of the constant temperature positioning bin; The temperature control sensor group is distributed in the constant temperature cavity and the bottom of the modular wound dressing.

[0008] According to the above-mentioned scheme, the material pumping unit structure satisfies: The aluminum alloy annular material pumping pipe is located directly below the adjacent aluminum alloy annular material conveying pipe; The bottom material pumping pipe is vertically connected with the aluminum alloy annular material pumping pipe and the material pumping nozzle; The material pumping connecting pipe is radially connected with the innermost ring aluminum alloy annular material pumping pipe and the central material pumping disc, and is radially connected with the adjacent aluminum alloy annular material pumping pipe, and the outer ring end is located at the gap between the adjacent bottom material pumping pipes.

[0009] According to the above-mentioned scheme, the nozzle layout comprises: The material feeding nozzles are distributed on the annular surfaces at equal intervals, the intervals between adjacent annular surfaces are constant, and the number of the material feeding nozzles increases in equal difference; The material suction nozzle annular surfaces are coaxial with the material feeding nozzle annular surfaces and have the same number; The height of the material suction nozzle is slightly lower than that of the material feeding nozzle and is closer to the wound end; The diameter of the material suction nozzle is slightly larger than that of the material feeding nozzle; The center point of the material suction nozzle on the same ring is rotated by 90° around the axis; Any material suction nozzle and two adjacent material feeding nozzles on the outer ring form an isosceles triangle.

[0010] According to the above scheme, the central region structure comprises: The central region has no bottom material feeding pipe or bottom material suction pipe, and the size matches the sensor module; The corresponding region of the modular wound dressing is provided with a rectangular embedded slot; The central material feeding disc and the central material suction disc are coaxial and have the same diameter, the central material feeding pipe is vertically fixed to the upper end edge of the central material feeding disc, the central material suction pipe is vertically fixed to the upper end edge of the central material suction disc, the edge position of the central material feeding disc is provided with an avoidance channel, the aperture of the avoidance channel matches the outer diameter of the central material suction pipe, and the central material feeding pipe and the central material suction pipe are mirror-symmetrically distributed on the two sides of the central material feeding disc in the radial direction.

[0011] According to the above scheme, the magnetic buckle interface comprises: A neodymium iron boron magnetic ring is arranged at the bottom of the constant-temperature positioning bin; An embedded clamping block made of polyoxymethylene resin is embedded in the inner wall of the butt joint groove at the bottom of the constant-temperature positioning bin through a dovetail groove structure, and is uniformly distributed along the circumference in six groups; A sealing silica gel ring is arranged in the annular groove at the outer edge of the neodymium iron boron magnetic ring; A magnetic conductive stainless steel ring is arranged at the top of the modular wound dressing and corresponds to the position of the neodymium iron boron magnetic ring; A guide clamping groove made of ABS is arranged at the edge of the top of the modular wound dressing, and the number matches that of the embedded clamping block.

[0012] According to the above scheme, the modular wound dressing comprises: The inner walls of the material feeding channel and the material suction channel are coated with a hydrophobic coating; Silica gel expansion rings are respectively fixed in the material feeding channel and the material suction channel, adopt a stepped structure, and have an increased outer diameter after expansion, so as to increase the sealing force; The wound contact end of the material suction nozzle and the material feeding nozzle is plated with a diamond-like carbon plating layer.

[0013] According to the above scheme, the constant-temperature optimization unit comprises: A constant-temperature control unit: S-shaped aluminum-magnesium alloy constant temperature coil covers the outer wall of each bottom material conveying pipe, and the covering area accounts for 65% of the surface area of the pipe wall. The liquid inlet is connected to the outlet of the external circulating heating equipment, and the liquid outlet is connected to the inlet end of the spiral copper pipe. Preheating unit: The spiral copper pipe is tightly wound around the outer wall of the central material conveying pipe. The inlet end and the outlet end of the spiral copper pipe penetrate the preheating cylindrical silo. The liquid outlet end of the spiral copper pipe is connected to the liquid inlet end of the external circulating heating equipment.

[0014] According to the above scheme, the detachable sensor module comprises: The magnetic base unit is composed of uniformly distributed radially magnetized neodymium iron boron rings and is embedded in the bottom docking groove of the constant temperature positioning bin, with the bottom surface flush with the bottom surface of the docking groove. The signal acquisition unit includes an alumina ceramic substrate, a gold-plated copper foil circuit layer, and 16 channels of gold-plated spring probes, and is magnetically connected below the magnetic base unit. The biosensor unit contains a polyimide substrate, a printed carbon nanotube sensor array, and a degradable zinc electrode, which is embedded in the rectangular embedded slot at the bottom of the modular dressing. The degradable zinc electrode is in pressure contact with the 16-channel gold-plated spring probe.

[0015] According to the above scheme, the temperature control sensor group comprises: The PT100 platinum resistance is coaxially arranged in the center of the internal flow channel of the central material conveying pipe. The K-type thin film thermocouple is installed at the bending part of the outer wall of the S-shaped aluminum-magnesium alloy constant temperature coil. The miniature optical fiber sensor is embedded in the wall of the bottom material conveying pipe.

[0016] A method for using a wound dressing device, comprising the following steps: S1, dressing assembly stage: select the appropriate modular wound dressing according to the wound condition, and guide the dressing to the bottom of the constant temperature positioning bin through the magnetic attraction force of the magnetic buckle interface; S2, wound fixation stage: remove the release film of the skin-friendly patch, attach the device to the wound area, fix it with the aid of a medical non-woven fabric pressure belt, apply a certain pressure range, and perform a sealing test, inject a detection gas pressure into the material conveying channel, and monitor the pressure drop within a certain threshold value within 30 seconds; S3, constant temperature system setting stage: connect the liquid outlet pipeline of the external circulating liquid supply equipment to the central material conveying pipe inlet, connect the liquid inlet pipeline of the external circulating liquid supply equipment to the central material conveying pipe outlet, connect the liquid outlet pipeline of the external heating equipment to the S-shaped aluminum-magnesium alloy constant temperature coil inlet, and connect the liquid inlet pipeline of the external heating equipment to the spiral copper pipe outlet. Set the target treatment temperature range and temperature fluctuation threshold value through the temperature control system. S4, wound surface treatment stage: start the cleaning liquid delivery pump to form a laminar flow field covering the wound surface under constant temperature control, and simultaneously start the suction pump to realize efficient recovery of waste liquid through the space staggered suction nozzle, and set the cleaning parameters; S5, real-time temperature control monitoring stage: continuously obtain temperature monitoring data of the distributed temperature control sensor group, dynamically adjust the heat exchange power of the constant temperature interlayer and the constant temperature coil, and trigger the safety protection mechanism when the detected drug liquid temperature exceeds the permitted fluctuation range.

[0017] (Three) beneficial effects Compared with the prior art, the present application provides a wound dressing device, which has the following beneficial effects: 1. Excellent wound cleaning efficiency: the delivery nozzle and the suction nozzle are arranged in a nested concentric circle, the suction ring is strictly located directly below the delivery ring, forming point-to-point precise recovery, the negative pressure field completely covers the delivery jet boundary layer, the waste liquid capture efficiency is improved, and the liquid flow cross interference and vortex of the traditional device are completely eliminated, and the optimized structure ensures that the fluid maintains stable laminar flow (optimal working interval) at low flow rate, avoiding the scouring damage of turbulent flow to the newly formed tissue.

[0018] 2. Innovative nozzle layout: the delivery nozzle adopts an arithmetic progression layout (such as 6 / 10 / 14 / 18), which realizes that the cleaning liquid flow difference between the central area and the periphery of the wound is controlled within ±8% (significantly better than the traditional >25% difference), the unit area pressure uniformity is improved, ensuring uniform cleaning without dead angles, the suction nozzle is slightly larger in diameter, slightly lower in position (closer to the wound), rotated by 90 degrees, and forms an isosceles triangle geometric relationship, and these designs work together: enhance negative pressure coverage and surface adaptability, eliminate backflow dead angles; break the symmetry of fluid, effectively suppress liquid flow resonance and turbulence, reduce shear force damage; guide the waste liquid to flow back efficiently along the short side of the triangle, and utilize the synergistic effect of gravity to reduce energy loss.

[0019] 3. Precise and intelligent constant temperature management: the S-shaped aluminum-magnesium alloy constant temperature coil main heating liquid pipe (covering area ≥65%) and the spiral copper pipe utilize waste heat to preheat the central delivery pipe, forming a cascade heating, which maximizes the maintenance of the cleaning liquid / liquid at the target treatment temperature (such as 37°C), the precise air insulation layer (0.5mm) design allows the necessary heat conduction to the suction pipe, maintaining the waste liquid temperature above 34°C, completely avoiding the problem of fibrin coagulation blockage caused by low temperature, PT100 platinum resistance (core fluid temperature, millisecond response), K-type thin film thermocouple (thermal stress point monitoring), optical fiber sensor (pipe wall micro area temperature) form a three-dimensional monitoring array. Real-time dynamic feedback, precise temperature control adjustment and safety protection are realized.

[0020] 4. Innovative central area and unobstructed sensing: Remove the central feed tube and central suction tube in the central area to provide unobstructed space for the detachable multi-module biosensor, greatly improving the detection accuracy of key parameters such as temperature, pH, and biomarkers in the central area of the wound (up to medical grade standards). The central feed tube and central suction tube are coaxially mirror-symmetrically arranged, with double-disk spacing control and double-flow channel physical isolation (central tube placed on both sides of the disk edge), ensuring balanced fluid distribution, eliminating temperature control bias and cross-contamination risk.

[0021] 5. Safe and stable magnetic quick-release connection and sealing: The neodymium-iron-boron magnetic ring and stainless steel ring generate strong adsorption force, providing stable pre-positioning and main fixing force, resisting gravity and pipeline pulling, and 6 groups of circumferentially distributed embedded clamps achieve reliable radial locking. The silicone sealing ring is deformed under pressure to fill the gap, effectively preventing body fluid leakage and bacterial migration risk.

[0022] 6. Long-term anti-fouling and tissue-friendly interface: Comprehensive nanoscale hydrophobic coating significantly reduces the adhesion of biological molecules (protein, fibrinogen) and the formation of bacterial biofilms, maintaining long-term channel patency (permeability decay rate approaching zero). The stepped silicone expansion ring achieves three-stage range-increasing sealing, with nonlinearly enhanced sealing force with pressure, durable (100,000 cycle tests), and the nozzle wound end coated with diamond-like carbon (DLC) forms a biologically inert, low-friction surface, allowing new granulation tissue to climb the surface without resistance, reducing the risk of mechanical damage.

[0023] 7. Flexible modularization and intelligent integration: Different specifications (such as three-ring / five-ring) dressings cover various sizes of wounds (20-120mm), enabling on-demand customization. The magnetic base unit, signal acquisition unit, and biosensor are modularly designed for easy replacement, maintenance, and data acquisition. The flexible substrate adapts to complex wounds, and the degradable electrode achieves functional compatibility. The rich sensor network combined with an external control system enables real-time, closed-loop monitoring and regulation of the wound microenvironment and treatment process. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the first perspective view of the present application; Figure 2 is the second perspective view of the present application; Figure 3 is the first partial perspective view of the present application; Figure 4 is the second partial perspective view of the present application; Figure 5 is the third partial perspective view of the present application; Figure 6 is the fourth partial perspective view of the present application; Figure 7 is the fifth partial perspective view of the present application; Figure 8 is a sixth partial perspective view of the present invention; Figure 9 is a seventh partial perspective view of the present invention; Figure 10 is an eighth partial perspective view of the present invention; Figure 11 is a ninth partial perspective view of the present invention; Figure 12 is a tenth partial perspective view of the present invention; In the figure: 100, constant temperature positioning bin; 110, constant temperature cavity; 120, constant temperature interlayer; 130, magnetic attraction buckle interface; 131, neodymium iron boron magnetic ring; 132, embedded clamping block; 133, sealing silica gel ring; 134, magnetic conductive stainless steel ring; 135, guide clamping groove; 140, preheating cylindrical bin; 150, butt joint groove; 200, modular wound dressing; 210, material conveying channel; 220, material extraction channel; 230, rectangular embedded groove; 240, silica gel expansion ring; 300, fixed skin-friendly patch; 400, material conveying unit; 410, central material conveying disc; 420, aluminum alloy annular material conveying pipe; 430, material conveying connecting pipe; 440, bottom material conveying pipe; 450, stainless steel material conveying nozzle; 460, central material conveying pipe; 500, material extraction unit; 510, central material extraction disc; 520, aluminum alloy annular material extraction pipe; 530, material extraction connecting pipe; 540, bottom material extraction pipe; 550, stainless steel material extraction nozzle; 560, central material extraction pipe; 600, constant temperature optimization unit; 610, S-shaped aluminum magnesium alloy constant temperature coil; 620, spiral copper pipe; 700, detachable sensor module; 710, magnetic attraction base unit; 720, signal acquisition unit; 721, aluminum oxide ceramic substrate; 722, gold-plated copper foil circuit layer; 723, 16-channel gold-plated spring probe; 730, biosensor unit; 731, polyimide substrate; 732, printed carbon nanotube sensing array; 733, degradable zinc electrode; 800, temperature control sensor group; 801, PT100 platinum resistance; 802, K-type thin film thermocouple; 803, miniature optical fiber sensor. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Please refer to Figures 1-12 The present application provides a technical solution: the present device provides a wound dressing device, comprising: The constant-temperature positioning bin 100 is provided with a constant-temperature cavity 110 in a cylindrical shell, a constant-temperature interlayer 120 in the side wall, a butt joint groove 150 at the bottom, and a central area in the geometric center of the constant-temperature cavity 110; The modular wound surface dressing 200 is detachably connected to the bottom of the constant-temperature positioning bin 100 through the magnetic suction buckle interface 130 inside the butt joint groove 150, and is provided with a pre-set material conveying channel 210 and a material pumping channel 220 inside. The fixed skin-friendly patch 300 is made of medical polyurethane and is annularly arranged at the bottom of the outer wall of the constant-temperature positioning bin 100. The wound surface cleaning mechanism comprises: The material conveying unit 400 comprises a central material conveying disc 410, a nested aluminum alloy annular material conveying pipe 420, a material conveying connecting pipe 430, a vertically arranged bottom material conveying pipe 440, a stainless steel material conveying nozzle 450, and a central material conveying pipe 460. The material pumping unit 500 comprises a central material pumping disc 510, a nested aluminum alloy annular material pumping pipe 520, a material pumping connecting pipe 530, a vertically arranged bottom material pumping pipe 540, a stainless steel material pumping nozzle 550, and a central material pumping pipe 560. The constant-temperature optimization unit 600 comprises an S-shaped aluminum-magnesium alloy constant-temperature coil pipe 610 covering the bottom material conveying pipe 440 and a spiral copper pipe 620 in the preheating cylindrical bin 140. The detachable sensor module 700 is arranged at the bottom center of the constant-temperature positioning bin 100. The temperature control sensor group 800 is distributedly arranged at the bottom of the constant-temperature cavity 110 and the modular wound surface dressing 200.

[0027] Specifically, the material pumping unit 500 structure satisfies: The aluminum alloy annular material pumping pipe 520 is located directly below the adjacent aluminum alloy annular material conveying pipe 420; The bottom material pumping pipe 540 is vertically connected to the aluminum alloy annular material pumping pipe 520 and the material pumping nozzle 550; The material pumping connecting pipe 530 is radially connected to the innermost ring aluminum alloy annular material pumping pipe 520 and the central material pumping disc 510, and is radially connected to the adjacent aluminum alloy annular material pumping pipe 520, and the outer ring end is located at the gap between the adjacent bottom material pumping pipes 540.

[0028] The annular material pumping pipe is accurately arranged 1.8 millimeters below the adjacent annular material conveying pipe, forming a vertical double-layer fluid channel: when the upper material conveying pipe sprays the cleaning liquid, the jet coverage range is strictly limited within a 0.6 millimeter thick boundary layer, the lower material pumping pipe negative pressure field completely covers an area 1.2 times that of the upper jet boundary layer, the waste liquid capture efficiency reaches 98.3%, this design completely eliminates liquid flow cross interference, and ensures that the laminar flow stability is maintained in the optimal working interval (conventional structure is prone to turbulent flow at low flow rate).

[0029] The aluminum alloy annular suction pipe 520 is made of 1.0 mm thick aluminum alloy material, and the gap with the S-shaped aluminum-magnesium alloy constant temperature coil pipe 610 maintains an air insulation layer of 0.5 mm. After the heat is conducted from the S-shaped aluminum-magnesium alloy constant temperature coil pipe 610 to the central conveying pipe 460, the heat penetrates the air layer and is transmitted to the central suction pipe 560, so that the temperature of the waste liquid is maintained at above 34 DEG C, and the pipeline blockage caused by the low-temperature coagulation of fibrin is effectively avoided.

[0030] The bottom suction pipe is connected with the aluminum alloy annular suction pipe 520 and the stainless steel conveying nozzle 450 at a vertical angle of 90 degrees. Compared with the conventional 45-degree inclined connection, the vertical structure reduces the fluid resistance and realizes a zero vortex flow channel design. The suction connecting pipe 530 is radially connected with the innermost annular suction pipe 520 and the central suction disc 510, and is also radially connected with the adjacent aluminum alloy annular suction pipe 520. The outer ring end is accurately positioned at the gap between adjacent bottom pipes (the gap is greater than or equal to 1.2 times the pipe diameter). The basic three-ring structure covers a wound surface of 20-60 mm, and the expanded five-ring structure covers a wound surface of 80-120 mm, so as to realize the design of customized requirements.

[0031] Specifically, the nozzle layout comprises: The conveying nozzles 450 are distributed on each annular upper surface at equal intervals, and the number of the conveying nozzles 450 is increased in equal difference. The suction nozzles 550 are coaxial with the conveying nozzles 450 and have the same number. The height of the suction nozzles 550 is slightly lower than that of the conveying nozzles 450, and is closer to the wound end. The diameter of the suction nozzles 550 is slightly larger than that of the conveying nozzles 450. The center point of the suction nozzles 550 rotates 90 degrees around the axis. Any suction nozzle 550 and the two adjacent outer ring conveying nozzles 450 form an isosceles triangle.

[0032] In the present application, the nested annular structure is arranged as four concentric annular structures. In the four concentric annular structures, six conveying nozzles are arranged on the inner ring, and the number of nozzles is increased by four for each outer ring (i.e., 10 for the second ring, 14 for the third ring, and 18 for the fourth ring). The equal-difference number configuration (6 / 10 / 14 / 18) forms a gradient coverage density, so that the difference in the flow of cleaning liquid between the central area and the periphery of the wound is controlled to be within ±8% (the difference in the conventional equal-difference layout is greater than 25%). The equal-interval circumferential distribution ensures that the uniformity of the cleaning liquid pressure received by each square millimeter of the wound surface is greater than 92%, so as to avoid local flushing damage. The constant annular spacing (the center distance between the rings is set to 5.8 mm) creates a laminar flow superposition effect, and the multi-ring jet flow is fused into a continuous liquid film (thickness 0.3±0.05 mm).

[0033] The feed nozzle 450 adopts an annular equidifferent increasing layout: the number of nozzles increases step by step from the inner ring to the outer ring, forming a gradient distribution of sparse center and dense periphery, compensating for the diffusion loss of the cleaning liquid at the edge of the wound, ensuring that the cleaning field is covered without dead angles, the difference in cleaning intensity between each annular layer is controlled within the clinically allowed threshold, the gradient density distribution eliminates the difference in cleaning intensity between the center and the edge, the unit area drug coverage of the wound is improved, and the constant ring spacing design makes the multi-layer jet flow into a continuous liquid film, avoiding the risk of tissue damage caused by sudden impact pressure, the annular layer of the suction nozzle 550 is coaxial with the feed layer and the number corresponds, a recovery point is arranged directly below each feed injection point, a point-to-point waste liquid capture channel is established, the dynamic balance between the feed amount and the suction amount is maintained, the flow balance ratio is 1:1.2 (feed amount: suction amount), waste liquid retention is prevented, the suction nozzle has a slightly larger diameter than the feed nozzle, forming a negative pressure coverage enhancement area, completely enveloping the cleaning jet flow range, solving the problem of dead angle of curved wound back suction, the center of the suction nozzle 550 in the same ring is rotated 90 degrees relative to the feed nozzle 450, breaking the fluid symmetry, effectively inhibiting the turbulence caused by liquid flow resonance, reducing the mechanical damage risk of fluid shear force to the newly formed tissue, any suction nozzle and the two feed nozzles of the adjacent outer ring form an isosceles triangle, the intersection point of the feed jet flow is accurately pointed to the center of the suction nozzle, guiding the waste liquid to flow back along the short side of the triangle, and the synergistic effect of natural gravity and negative pressure adsorption reduces the flow energy loss, the long side direction of the triangle forms a vortex damping area, weakening the turbulence intensity, and the acute angle end generates an auxiliary negative pressure gradient, enhancing the recovery capacity of the edge area.

[0034] Specifically, the central region structure comprises: The central region has no bottom feed pipe 440 or bottom suction pipe 540, and the size matches the sensor module 700; The modular wound dressing 200 is provided with a rectangular embedded slot 230 in the corresponding region; The central feed disc 410 and the central suction disc 510 are coaxial and have the same diameter, the central feed pipe 460 is vertically fixed to the upper end edge of the central feed disc 410, the central suction pipe 560 is vertically fixed to the upper end edge of the central suction disc 510, the edge position of the central feed disc 410 is provided with an avoidance channel 411, the aperture of the avoidance channel 411 matches the outer diameter of the central suction pipe 560, and the central feed pipe 460 and the central suction pipe 560 are mirror-symmetrically distributed on the two sides of the central feed disc 410 in the radial direction.

[0035] The central area cancels the bottom feed pipe 440 and the bottom suction pipe 540 layout to form an unobstructed monitoring space, which accurately matches the size of the multi-module sensor, ensures that the sensing surface directly contacts the central area of the wound, avoids the obstruction of the pipeline structure to the measurement path, and improves the detection accuracy of temperature / pH / biomarker to the medical level. The modular dressing has a rectangular embedded groove 230 at the corresponding position, the groove depth and the sensor module thickness form an interference fit, realize three-dimensional positioning and locking, the groove wall is coated with a static conductive coating to eliminate sensor signal interference, the central feed disc and the suction disc are coaxial and have an accurate diameter match, forming a mirror-symmetrical fluid distribution hub, the feed / suction flow is evenly distributed to each annular pipe, the distance between the two discs maintains a constant heat conduction gap, avoiding temperature interference leading to temperature control deviation, the feed pipe and the suction pipe are vertically fixed on the upper end edge of the disc body, the feed pipe is arranged on the left edge of the feed disc in the radial direction, and the suction pipe is symmetrically located on the right edge, forming a double-flow channel physical isolation barrier to cut off the risk of fluid cross-contamination from the source.

[0036] Specifically, the magnetic buckle interface 130 includes: A neodymium iron boron magnetic ring 131 is arranged at the bottom of the constant temperature positioning bin 100; An embedded clamping block 132 made of polyformaldehyde resin is embedded in the inner wall of the butt joint groove 150 at the bottom of the constant temperature positioning bin 100 through a dovetail groove structure, and is evenly distributed along the circumference in six groups; A sealing silica gel ring 133 is arranged in the annular groove 136 at the outer edge of the neodymium iron boron magnetic ring 131; A magnetically conductive stainless steel ring 134 is arranged at the top of the modular wound dressing 200 and corresponds to the position of the magnetic ring 131; A guide clamping groove 135 made of ABS is arranged at the edge of the dressing 200, and the number matches that of the clamping block 132.

[0037] The neodymium iron boron magnetic ring 131 and the magnetically conductive stainless steel ring 134 form an axial adsorption unit, the magnetic field covers the entire butt joint section, realizes equipment pre-positioning, the vertical adsorption force resists the weight of the dressing and the pipeline pulling, ensures that the dressing does not fall off during high-altitude operation, the embedded clamping block 132 is embedded in the bin body through the dovetail groove, the six groups of clamping blocks evenly distributed along the circumference form a radial anti-torsion array, the inclined surface of the embedded clamping block 132 guides the dressing to rotate to the locked position (rotation angle <15°), the embedded clamping block 132 is clamped into the guide clamping groove 135 to form mechanical interlocking in the locked state, the silica gel sealing ring (133) is arranged in the peripheral groove of the neodymium iron boron magnetic ring 131, and is deformed under pressure to fill all micro gaps between the bin body and the dressing, thereby isolating the body fluid penetration and bacterial migration path.

[0038] Specifically, the modular wound dressing 200 includes: The inner walls of the feed channel 210 and the suction channel 220 are coated with a hydrophobic coating; Silica gel expansion ring 240 is fixed in the material conveying channel 210 and the material pumping channel 220 respectively, adopts a stepped structure, and the outer diameter increases after expansion, so as to increase the sealing force. The material pumping nozzle 550 and the material conveying nozzle 450 are coated with a diamond-like coating layer at the contact end.

[0039] The inner wall of the material conveying channel 210 and the material pumping channel 220 is fully covered with a nanoscale hydrophobic coating layer, forming a low adhesion molecule interface, eliminating the adsorption and accumulation of biological molecules such as proteins and fibrinogen, reducing the flow resistance of the drug solution, ensuring the residue-free delivery of high-viscosity drug solutions such as antibiotics, inhibiting the formation of bacterial biofilms, and the long-term use of the channel has a permeability decay rate close to zero. The silica gel expansion ring 240 adopts a stepped special-shaped structure embedded in the channel inner wall, and the expansion ring expands in a stepped manner when the liquid passes through, realizing a three-stage range-increasing sealing. The outer diameter increases dynamically after expansion, and the sealing force is nonlinearly enhanced with the increase of pressure. The silica gel material maintains the medical-grade standard recovery rate after 100,000 times of pressure cycle test. The diamond-like coating layer forms a biologically inert interface at the contact end, and the newly formed granulation tissue can climb along the surface of the coating layer without resistance.

[0040] Specifically, the constant temperature optimization unit 600 comprises: Constant temperature control unit: The S-shaped aluminum-magnesium alloy constant temperature coil pipe 610 covers the outer wall of each bottom material conveying pipe 440, and the covering area accounts for more than 65% of the pipe wall surface area. The liquid inlet of the S-shaped aluminum-magnesium alloy constant temperature coil pipe 610 is connected to the liquid outlet of the external circulating heating equipment, and the liquid outlet is connected to the inlet end of the spiral copper pipe 620. Preheating unit: The spiral copper pipe 620 is tightly wound around the outer wall of the central material conveying pipe 460. The inlet end and the outlet end of the spiral copper pipe 620 penetrate the preheating cylindrical silo 140, and the liquid outlet end of the spiral copper pipe 620 is connected to the liquid inlet end of the external circulating heating equipment.

[0041] The S-shaped aluminum-magnesium alloy constant-temperature coil 610 is wrapped around the bottom material conveying pipe 440 in a biomimetic snake shape, the coil covers an area of ≥65% of the pipe wall, forms an axial continuous and circumferential alternating heat conduction path, eliminates the temperature fault of the traditional ring-shaped coil, the light weight of the aluminum-magnesium alloy reduces the structural load, the high thermal conductivity ensures that the heat quickly penetrates the material conveying pipe wall, compensates for the heat loss during the flow of the medicinal liquid, the S-shaped bending structure increases the turbulence of the fluid in the pipe, prolongs the residence time of the heat exchange medium, enhances the temperature fluctuation absorption capacity, the S-shaped aluminum-magnesium alloy constant-temperature coil 610 and the bottom material conveying pipe 440 can be provided with heat-conducting silica gel to accelerate heat transfer, and the spiral copper pipe 620 is wound around the outer wall of the central material conveying pipe 460 with a dense pitch, the medium that has completed main heating in the S-shaped aluminum-magnesium alloy constant-temperature coil 610 enters the spiral copper pipe 620, and the central material conveying pipe is preheated by using residual heat, the ultra-high thermal conductivity of the copper material increases the preheating efficiency to more than 3 times of that of the traditional stainless steel structure, and the radial pressure generated by the spiral winding enhances the contact tightness of the central material conveying pipe 460 and the spiral copper pipe 620, and eliminates the air heat insulation gap.

[0042] Specifically, the detachable sensor module 700 includes: The magnetic base unit 710 is composed of a uniformly distributed radially magnetized neodymium iron boron ring, is embedded in the bottom docking groove 150 of the constant-temperature positioning bin 100, and the bottom surface is flush with the bottom surface of the docking groove 150; The signal acquisition unit 720 includes an aluminum oxide ceramic substrate 721, a gold-plated copper foil circuit layer 722, and 16-channel gold-plated spring probes 723, and is magnetically connected below the magnetic base unit 710; The biosensor unit 730 includes a polyimide substrate 731, a printed carbon nanotube sensing array 732, and a degradable zinc electrode 733, and is embedded in the rectangular embedded groove 230 at the bottom of the modular dressing 200; The degradable zinc electrode 733 is in pressure contact with the 16-channel gold-plated spring probes 723.

[0043] The radial magnetizing ring array constructs a self-alignment magnetic field topology, so that the signal acquisition unit 720 and the biosensor unit 730 are automatically corrected in pose deviation in three-dimensional space, eliminating the micron-level unevenness of the contact surface caused by traditional threaded fastening. The alumina ceramic substrate 721 acts as an insulating dielectric layer to block electromagnetic interference. The gold-plated copper foil circuit 722 forms a low-impedance signal path, and the surface micro-groove structure increases the adhesion of the gold-plated layer. The 16-channel gold-plated spring probes 723 are designed by suspension and pressure connection, which can adaptively compensate for the thermal deformation displacement of the biosensor unit, maintain constant contact pressure to transmit electrochemical signals without attenuation, and the flexible nature of the polyimide base 731 forms a skin-like wrinkle deformation in the rectangular embedded slot, perfectly fitting the deep wound profile. The microelectrode spacing of the printed carbon nanotube array 732 matches the capillary density, enabling multi-parameter synchronous capture. The degradable zinc electrode 733 is enzymatically degraded after the end of the working period, and its ion release rate is positively correlated with the healing progress of the wound.

[0044] Specifically, the temperature control sensor group 800 includes: The PT100 platinum resistance 801 is coaxially arranged in the center of the internal flow channel of the central feed pipe 460; The K-type thin film thermocouple 802 is installed at intervals on the outer wall bending part of the S-shaped aluminum-magnesium alloy constant temperature coil 610; The miniature optical fiber sensor 803 is embedded in the wall of the bottom feed pipe 440.

[0045] The PT100 platinum resistance 801 is coaxially suspended in the geometric center of the flow channel of the central feed pipe 460, which can capture the core temperature of the liquid medicine in real time and is resistant to turbulent flow interference, so that the measurement value is not affected by flow fluctuations. It realizes zero thermal resistance contact with the liquid medicine, and the response speed reaches milliseconds. The K-type thin film thermocouple 802 is installed on the outer wall curvature of each bending part of the S-shaped aluminum-magnesium alloy constant temperature coil 610, which locks the heat stress concentration area. The thickness of the thin film structure is only 0.1mm, which can feedback the real temperature of the coil metal surface in real time. The double-node temperature difference comparison analysis technology can accurately identify local blockage or scaling abnormalities. The miniature optical fiber sensor 803 is directly fused and embedded into the middle layer of the wall of the bottom feed pipe 440, eliminating the thermal conduction delay of traditional surface mounting. The optical fiber Bragg grating technology converts temperature into optical signal, completely avoiding electromagnetic interference, and the spatial resolution reaches 0.5mm, positioning the local overheating / overcooling microzone of the pipe wall.

[0046] A method for using a wound dressing device, comprising the following steps: S1, dressing assembly stage: select the appropriate modular wound dressing 200 according to the wound condition, and assemble the dressing 200 to the bottom of the constant temperature positioning bin 100 through the magnetic attraction of the magnetic buckle interface 130; S2, wound fixation stage: remove the release film of the skin-friendly patch 300, attach the device to the wound area, fix it with the non-woven fabric pressure band, apply a certain pressure range, and perform a sealing test. Inject test gas into the delivery channel 210 and monitor the pressure drop within a certain threshold for 30 seconds. S3, constant temperature system setting stage: connect the liquid outlet of the external circulating liquid supply device to the inlet of the central delivery pipe 460, connect the liquid inlet of the external circulating liquid supply device to the outlet of the central suction pipe 560, connect the liquid outlet of the external heating device to the inlet of the S-shaped aluminum-magnesium alloy constant temperature coil 610, and connect the liquid inlet of the external heating device to the outlet of the spiral copper pipe 620. Set the target treatment temperature range and temperature fluctuation threshold through the temperature control system. S4, wound treatment stage: start the cleaning liquid delivery pump to form a laminar flow field covering the wound under constant temperature control through the delivery nozzle 450. Start the suction pump at the same time to achieve efficient waste liquid recovery through the spatially staggered suction nozzle 550, and set the cleaning parameters. S5, real-time temperature control monitoring stage: continuously obtain temperature monitoring data from the distributed temperature control sensor group 800, dynamically adjust the heat exchange power of the constant temperature layer 120 and the constant temperature coil 630, and trigger the safety protection mechanism when the detected liquid temperature exceeds the permitted fluctuation range.

[0047] Working principle: This device realizes intelligent and dynamic treatment of wounds through modular design, precise constant temperature control and efficient cleaning circulation system. Its core principle can be summarized as follows: 1. Modular rapid assembly and adaptation Magnetic buckle interface 130: through the strong magnetic adsorption of neodymium-iron-boron magnetic ring 131 and magnetically conductive stainless steel ring 134, combined with the mechanical positioning of dovetail groove embedded buckle 132 and guide slot 135, the device realizes rapid and stable connection of modular wound dressing 200 and constant temperature positioning chamber 100.

[0048] Sealing guarantee: the sealing silicone ring 133 fills the groove 136 outside the magnetic ring to prevent liquid leakage; the stepped structure of the silicone expansion ring 240 expands when the liquid is injected, enhancing the sealing force of the channel.

[0049] 2. Constant temperature environment construction and dynamic regulation Constant temperature positioning chamber 100: Constant temperature cavity 110: through the cooperation of the constant temperature layer 120 on the side wall and the S-shaped aluminum-magnesium alloy constant temperature coil 610 at the bottom, the temperature inside the cavity is maintained stable.

[0050] Two-stage temperature control system: Preheating unit: the spiral copper pipe 620 preheats the cleaning liquid in the central delivery pipe 460 to improve the uniformity of the initial temperature; Constant temperature coil 610: S-shaped aluminum-magnesium alloy structure covers the outer wall of the bottom delivery pipe 440 (coverage area ≥ 65%), and the temperature is precisely controlled by an external circulating heating device to ensure that the temperature fluctuation of the drug solution is ≤ ± 0.8℃.

[0051] Temperature control sensor group 800: Multi-point monitoring: PT100 platinum resistance 801 monitors the internal flow channel temperature of the delivery pipe, K-type thermocouple 802 monitors the temperature at the bending part of the constant temperature coil, and miniature optical fiber sensor 803 is embedded in the wall of the central delivery pipe to form a distributed temperature field monitoring network.

[0052] Dynamic adjustment: According to the feedback data of the sensor, the heat exchange power of the constant temperature interlayer and the coil is adjusted in real time to maintain the temperature of the drug solution within the target range (within the ±1℃ fluctuation threshold).

[0053] 3. Wound cleaning and drug delivery Delivery unit 400 and suction unit 500 work together: Delivery system: The central delivery disc 410 and the annular delivery pipe 420 are nested, and the constant temperature drug solution is uniformly sprayed on the wound surface through the bottom delivery pipe 440 and the stainless steel delivery spray head 450.

[0054] Optimization of spray head layout: Delivery spray head 450: Each annular layer is distributed in equal difference, forming a laminar flow field covering the wound surface; Suction spray head 550: The diameter is increased by 10%, the height is reduced by 2mm, and it is staggered around the axis by rotating 90°, forming an isosceles triangle topology with the adjacent outer ring delivery spray head, achieving a waste liquid recovery rate of ≥95%.

[0055] Suction system: The annular suction pipe 520 is nested below the delivery pipe, and the waste liquid is recovered through the bottom suction pipe 540 and the stainless steel suction spray head 550.

[0056] Topology optimization design: The diameter of the suction spray head 550 is slightly larger than that of the delivery spray head 450, and the height is lower to be close to the wound surface. The delivery pressure is 0.6MPa, the suction vacuum degree is-65kPa, the flow ratio is 1:1.2, which matches the characteristics of wound exudation. The hydrophobic coating (contact angle > 110°) and the diamond-like carbon coating (friction coefficient < 0.1) reduce the flow resistance and biofilm adhesion.

[0057] Synchronous operation: In the delivery and suction process, the fluid dynamics balance is realized through the avoidance channel 411 and the mirror-symmetrical central delivery 460 and central suction pipe 560 to prevent local pressure abnormalities.

[0058] 4. Intelligent sensing and closed-loop control Removable sensor module 700: Biological signal acquisition: Carbon nanotube sensing array 732 and degradable zinc electrode 733 embedded in the bottom of the dressing, real-time monitoring of wound pH, electrolyte concentration and other biological signals, real-time warning of infection risk (pH > 7.6 triggers shutdown).

[0059] Data transmission: 16-channel gold-plated spring probe 723 connects the signal acquisition unit 720 through the magnetic base unit 710 to upload data to the external control system.

[0060] Safety protection mechanism: When the temperature of the liquid medicine exceeds the set threshold (±2℃) or the pressure is abnormal, an alarm is triggered and the feeding / drawing is automatically suspended to prevent secondary damage to the wound.

[0061] Failure redundancy mechanism: Constant temperature sandwich 120 and constant temperature coil 610 double-channel heating, single path failure can still maintain basic temperature control; Non-contact monitoring by micro optical fiber sensor 803 to avoid false judgments caused by liquid pollution.

[0062] Example one: Intensive care unit (ICU), burn wound treatment of burn patients Scene description: A patient with extensive burns loses skin barrier function, is susceptible to infection, and needs continuous cleaning. The device combines modular dressing 200 with constant temperature positioning bin 100 to achieve dynamic cleaning and drug delivery of the wound.

[0063] Key parameters and threshold settings: Temperature threshold: The constant temperature sandwich 120 is maintained at 37±0.5℃ (simulating normal body temperature), ensuring that the temperature of the liquid medicine does not irritate the wound.

[0064] The S-shaped aluminum-magnesium alloy constant temperature coil 610 has a temperature fluctuation range of ±1℃, and when the threshold is exceeded, heating / cooling compensation is triggered.

[0065] Pressure threshold: The pressure difference between the bottom feeding pipe 440 and the drawing pipe 540 is set to 5-10mmHg to avoid secondary damage caused by excessive local pressure on the wound.

[0066] Sealing detection: The pressure detection threshold of the feeding channel 210 is ±2kPa, and if the pressure drop exceeds the threshold within 30 seconds, an alarm will be triggered to indicate a failed seal.

[0067] Example two: Intensive care unit (ICU), postoperative infection high-risk patient care Scene description: The device can quickly replace the modular dressing 200 through the magnetic buckle interface 130 and monitor the pH value and electrolyte concentration of the wound surface in real time through the biosensor unit 730.

[0068] Key parameters and threshold settings: Biosignal threshold: The pH value warning range of the wound surface is 7.0-7.4, and the threshold value is exceeded to prompt the risk of infection and trigger the delivery of antibacterial liquid.

[0069] The electrolyte concentration fluctuation threshold monitored by the degradable zinc electrode 733 is set to ±5%, and when it is abnormal, it prompts the abnormal metabolism of tissues.

[0070] Suction efficiency threshold: The waste liquid recovery rate of the suction nozzle 550 is 10-15 mL / min, and when it is lower than the threshold, it prompts the blockage of the pipeline or the failure of the seal.

[0071] Example Three: Emergency treatment of laboratory chemical burns Scene description: The experimental personnel are caused by chemical burns due to strong acid contact, and need to be immediately washed and drug permeated. The device can quickly deliver neutralizing liquid (such as sodium bicarbonate solution) through the central delivery pipe 460, and recover the waste liquid through the suction unit 500.

[0072] Key parameters and threshold settings: Irrigation liquid temperature threshold: The outlet temperature of the central delivery pipe 460 is set to 20±2℃ to avoid high temperature to aggravate tissue damage.

[0073] Waste liquid recovery threshold: The waste liquid acid concentration monitoring threshold of the suction nozzle 550 is 0.1 mol / L, and when it is exceeded, it automatically switches to the neutralizing liquid delivery mode.

[0074] Example Four: Chronic wound management of diabetic foot ulcers Scene description: Diabetic patients are caused by foot ulcers due to neuropathy, and need long-term dynamic monitoring and drug penetration treatment. The device provides personalized treatment programs through the combination of the temperature control sensor group 800 and the biosensor unit 730.

[0075] Key parameters and threshold settings: Temperature fluctuation threshold: The S-shaped aluminum-magnesium alloy constant temperature coil 610 maintains the liquid temperature at 36.5±1℃ to avoid the influence of low temperature on the activity of the drug.

[0076] Healing progress monitoring threshold: The biosensor array 732 monitors changes in cellular activity at the wound site, and when the metabolic rate of the cells is less than 10% of the baseline value, it indicates that the drug ratio needs to be adjusted.

[0077] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and spirit of the application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A wound dressing device, characterized in that, The application relates to a constant-temperature positioning bin (100) and a modular wound surface dressing (200). The constant-temperature positioning bin (100) comprises a constant-temperature cavity (110) in a cylindrical shell, a constant-temperature interlayer (120) in a side wall, and a butt joint groove (150) in a bottom part. The modular wound surface dressing (200) is detachably connected to the bottom part of the constant-temperature positioning bin (100) through a magnetic attraction buckle interface (130) in the butt joint groove (150), and a pre-set material conveying channel (210) and a material pumping channel (220) are arranged in the modular wound surface dressing (200). The fixed skin-friendly patch (300) is made of medical polyurethane and is arranged at the bottom part of the outer wall of the constant-temperature positioning bin (100). The wound surface cleaning mechanism comprises a material conveying unit (400) and a material pumping unit (500). The material conveying unit (400) comprises a central material conveying disc (410), a nested aluminum alloy annular material conveying pipe (420), a material conveying connecting pipe (430), a vertically arranged bottom material conveying pipe (440), a stainless steel material conveying nozzle (450) and a central material conveying pipe (460). The material pumping unit (500) comprises a central material pumping disc (510), a nested aluminum alloy annular material pumping pipe (520), a material pumping connecting pipe (530), a vertically arranged bottom material pumping pipe (540), a stainless steel material pumping nozzle (550) and a central material pumping pipe (560). The constant-temperature optimization unit (600) comprises an S-shaped aluminum-magnesium alloy constant-temperature coil pipe (610) covering the bottom material conveying pipe (440) and a spiral copper pipe (620) in a preheating cylindrical bin (140). A detachable sensor module (700) is arranged at the bottom part of the constant-temperature positioning bin (100). A temperature control sensor group (800) is distributedly arranged at the constant-temperature cavity (110) and the bottom part of the modular wound surface dressing (200).

2. The wound dressing apparatus of claim 1, wherein The material pumping unit (500) satisfies the following structure: The aluminum alloy annular material pumping pipe (520) is located directly below the adjacent aluminum alloy annular material conveying pipe (420). The bottom material pumping pipe (540) is vertically connected with the aluminum alloy annular material pumping pipe (520) and the material pumping nozzle (550). The material pumping connecting pipe (530) is radially connected with the innermost aluminum alloy annular material pumping pipe (520) and the central material pumping disc (510), and is radially connected with the adjacent aluminum alloy annular material pumping pipe (520), and the outer ring end is located at the gap between the adjacent bottom material pumping pipes (540).

3. A wound dressing device according to claim 2, wherein The nozzle layout comprises the following: The material conveying nozzles (450) are equally and circularly distributed on each annular ring, the adjacent annular rings have constant spacing, and the number of the material conveying nozzles (450) increases in an arithmetic progression. The material pumping nozzles (550) are coaxial with the material conveying nozzles (450) and have the same number. The height of the material pumping nozzles (550) is slightly lower than that of the material conveying nozzles (450) and is closer to the wound surface. The diameter of the material pumping nozzles (550) is slightly larger than that of the material conveying nozzles (450). The central point of the material pumping nozzles (550) on the same ring is rotated by 90 degrees around the axis. Any material pumping nozzle (550) and the two adjacent outer ring material conveying nozzles (450) form an isosceles triangle.

4. The wound dressing apparatus of claim 1, wherein The central region structure comprises the following: The central region is free of any bottom material conveying pipe (440) or bottom material pumping pipe (540) and has a size matched with the sensor module (700). A rectangular embedded groove (230) is arranged in the corresponding region of the modular wound surface dressing (200). The central feeding disc (410) is coaxial with the central pumping disc (510) and has the same diameter, the central feeding pipe (460) is vertically fixed on the upper edge of the central feeding disc (410), the central pumping pipe (560) is vertically fixed on the upper edge of the central pumping disc (510), the edge of the central feeding disc (410) is provided with an avoiding channel (411) penetrating through, the avoiding channel (411) has a hole diameter matched with the outer diameter of the central pumping pipe (560), and the central feeding pipe (460) and the central pumping pipe (560) are in mirror image symmetry and distributed on the two sides of the central feeding disc (410) in the radial direction.

5. The wound dressing apparatus of claim 1, wherein, The magnetic attraction buckle interface (130) comprises: A neodymium iron boron magnetic ring (131) is arranged at the bottom of the constant-temperature positioning bin (100); An embedded clamping block (132) made of polyformaldehyde resin is embedded in the inner wall of the butt joint groove (150) at the bottom of the constant-temperature positioning bin (100) through a dovetail groove structure and is evenly distributed in six groups along the circumference; A sealing silica gel ring (133) is arranged in the annular groove (136) at the outer edge of the neodymium iron boron magnetic ring (131); A magnetic conductive stainless steel ring (134) is arranged at the top of the modular wound surface dressing (200) and corresponds to the position of the neodymium iron boron magnetic ring (131); A guide clamping groove (135) made of ABS is arranged at the edge of the top of the modular wound surface dressing (200) and has a number matched with that of the embedded clamping block (132).

6. The wound dressing apparatus of claim 1, wherein The modular wound surface dressing (200) comprises: The inner walls of the feeding channel (210) and the pumping channel (220) are coated with a hydrophobic coating; A silica gel expansion ring (240) is fixed in the feeding channel (210) and the pumping channel (220) respectively and adopts a stepped structure, so that the outer diameter is increased after expansion to increase the sealing force; The wound surface contact end of the pumping nozzle (550) and the feeding nozzle (450) is plated with a diamond-like carbon coating.

7. The wound dressing apparatus of claim 1, wherein The constant-temperature optimization unit (600) comprises: A constant-temperature control unit: An S-shaped aluminum-magnesium alloy constant-temperature coil pipe (610) covers the outer wall of each bottom feeding pipe (440), the covering area accounts for ≥65% of the pipe wall surface area, the liquid inlet of the S-shaped aluminum-magnesium alloy constant-temperature coil pipe (610) is connected to the liquid outlet of an external circulating heat supply device, and the liquid outlet of the S-shaped aluminum-magnesium alloy constant-temperature coil pipe (610) is connected to the inlet end of a spiral copper pipe (620); A preheating unit: The spiral copper pipe (620) is tightly wound around the outer wall of the central feeding pipe (460), the inlet end and the outlet end of the spiral copper pipe (620) penetrate through the preheating cylindrical bin (140), and the liquid inlet end of the spiral copper pipe (620) is connected to the liquid outlet end of an external circulating heat supply device.

8. The wound dressing apparatus of claim 1, wherein, The detachable sensor module (700) comprises: A magnetic attraction base unit (710) composed of uniformly distributed radially magnetized neodymium iron boron rings is embedded in the butt joint groove (150) at the bottom of the constant-temperature positioning bin (100) and has a bottom surface flush with the bottom surface of the butt joint groove (150); A signal acquisition unit (720) comprising an aluminum oxide ceramic substrate (721), a gold-plated copper foil circuit layer (722), and 16-channel gold-plated spring probes (723) is magnetically connected below the magnetic attraction base unit (710); The biosensor unit (730) includes a polyimide substrate (731), a printed carbon nanotube sensor array (732), and a degradable zinc electrode (733) embedded in a rectangular embedding slot (230) at the bottom of the modular dressing (200); The degradable zinc electrode (733) is in pressure contact with the 16-channel gold-plated spring probe (723).

9. The wound dressing apparatus of claim 1, wherein, The temperature control sensor group (800) includes: The PT100 platinum resistance (801) is coaxially arranged in the center of the internal flow channel of the central delivery pipe (460); The K-type thin film thermocouple (802) is installed at the bending part of the S-shaped aluminum-magnesium alloy constant temperature coil (610); The micro optical fiber sensor (803) is embedded in the wall of the bottom delivery pipe (440).

10. A method of using a wound dressing apparatus according to any one of claims 1-9, wherein, The method includes the following steps: S1, dressing assembly stage: select the appropriate modular wound dressing (200) according to the wound condition, and assemble the dressing (200) to the bottom of the constant temperature positioning bin (100) through the magnetic attraction of the magnetic buckle interface (130); S2, wound fixation stage: remove the release film of the skin-friendly patch (300), and paste the device to the wound area, and fix it with the aid of the medical non-woven fabric pressure belt, apply a certain pressure range, and perform sealing detection, inject detection gas pressure into the delivery channel (210), and monitor the pressure drop within a certain threshold within 30 seconds; S3, constant temperature system setting stage: connect the liquid outlet pipeline of the external circulating liquid supply equipment to the inlet of the central delivery pipe (460), connect the liquid inlet pipeline of the external circulating liquid supply equipment to the outlet of the central delivery pipe (560), connect the liquid outlet pipeline of the external heating equipment to the inlet of the S-shaped aluminum-magnesium alloy constant temperature coil (610), and connect the liquid inlet pipeline of the external heating equipment to the outlet of the spiral copper pipe (620), set the target treatment temperature range and temperature fluctuation threshold through the temperature control system; S4, wound treatment stage: start the cleaning liquid delivery pump, and form a laminar flow field covering the wound under the control of the constant temperature through the delivery nozzle (450), and simultaneously start the suction pump, realize efficient recovery of waste liquid through the spatially staggered layout of the suction nozzle (550), and set the cleaning parameters; S5, real-time temperature control monitoring stage: continuously acquire temperature monitoring data of the distributed temperature control sensor group (800), dynamically adjust the heat exchange power of the constant temperature interlayer (120) and the constant temperature coil (630), and trigger the safety protection mechanism when the detected liquid temperature exceeds the permitted fluctuation range.

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