Wound surface negative pressure dressing device

Abstract

The application relates to the technical field of medical instrument consumables, and provides a wound surface negative pressure dressing device, which comprises a control driving part, a first drainage channel and a gas inlet end in communication with the first drainage channel; a pressure regulating part arranged on the control driving part and provided with a second drainage channel; and a collecting part detachably arranged on the control driving part and provided with a third drainage channel and a storage space; the collecting part comprises a sponge dressing and a suction disc film, and the suction disc film is used for fixing the sponge dressing to a wound of a patient. The wound surface negative pressure dressing device can solve the technical problem that, in the prior art, the volume of a wound changes due to sudden activity of a patient, the negative pressure source cannot be adjusted in time due to fixed suction speed or the suction speed cannot be adjusted in time, and the pressure in the wound fluctuates, which is not conducive to recovery of the patient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical device consumables, in particular to a wound surface negative pressure dressing device. BACKGROUND

[0002] The wound surface negative pressure dressing device can be used for treating slow-cleaning wounds. After the wound is closed, the negative pressure source can discharge the liquid, bacteria and other substances in the wound to the outside of the body through the drainage tube, so as to keep the wound surface isolated from the outside world, reduce the tension of the wound, avoid the infection of the wound by external bacteria, and accelerate the blood circulation and increase the blood supply under the negative pressure, thereby facilitating the recovery of the wound surface.

[0003] However, the negative pressure source of the traditional wound surface negative pressure dressing device usually has a fixed suction speed or switches between multiple different suction speed gears to suck air to form negative pressure. However, when the volume of the wound increases due to the sudden instantaneous activity of the patient, the negative pressure value in the wound may decrease due to the fixed suction speed or the inability to timely adjust the suction speed, thereby causing the liquid to be unable to be effectively drained to the outside of the body, the bacteria in the outside world to enter the inside of the wound through the gap between the dressing edge or the drainage tube, and other problems. Or when the volume of the wound decreases due to the sudden instantaneous activity of the patient, the negative pressure value in the wound may increase, thereby causing the local blood perfusion to decrease, the patient to have obvious traction pain and swelling pain, and other problems. SUMMARY

[0004] The present application provides a wound surface negative pressure dressing device, which can improve the technical problem in the related art that the volume of the wound changes due to the sudden activity of the patient, and the pressure in the wound fluctuates due to the fixed suction speed or the inability to timely adjust the suction speed of the negative pressure source, which is not conducive to the recovery of the patient.

[0005] The present application provides a wound surface negative pressure dressing device, which includes:

[0006] The control driving part has a first drainage channel and an air inlet end connected with the first drainage channel.

[0007] The pressure regulating part is arranged on the control driving part and has a second drainage channel, one end of the second drainage channel being connected with the first drainage channel.

[0008] The collecting part is detachably arranged on the control driving part and has a third drainage channel and a storage space, one end of the third drainage channel being connected with the storage space, the other end of the third drainage channel being used for fixing the wound of the patient, and the storage space being connected with the other end of the second drainage channel. The collecting part includes a sponge dressing and a suction disc film, and the suction disc film is used for fixing the sponge dressing and the wound of the patient.

[0009] The control driving part is configured to form a negative pressure in the storage containing space through the air inlet end, the first drainage channel and the second drainage channel, so that the storage containing space attracts the exudate of the wound into the storage containing space through the third drainage channel, and the pressure regulating part is configured to release the pressure or increase the negative pressure when the pressure in the storage containing space fluctuates.

[0010] The technical solution provided in the embodiments of the present application has at least the following technical effects:

[0011] The wound surface negative pressure dressing device provided in the embodiments of the present application forms an initial negative pressure in the storage containing space of the collecting part through the air inlet end of the control driving part, the first drainage channel and the second drainage channel of the pressure regulating part, and the initial negative pressure acts on the wound through the third drainage channel, so that the exudate of the wound flows into the storage containing space along the third drainage channel under the action of the negative pressure difference. When the volume of the wound increases due to the movement of the patient and the pressure in the storage containing space decreases, the pressure regulating part automatically increases the air extraction amount of the control driving part to increase the negative pressure value in the storage containing space; when the volume of the wound decreases due to the movement of the patient and the pressure in the storage containing space increases, the pressure regulating part automatically releases the pressure in the storage containing space, thereby improving the problem that the sudden change of the volume of the wound due to the movement of the patient causes the pressure in the wound to fluctuate, which is not conducive to the recovery of the patient, because the negative pressure source (the control driving part) cannot adjust the air extraction speed in time (delay from pressure monitoring to control of air extraction speed change). BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 The structure diagram of the wound surface negative pressure dressing device provided in the embodiments of the present application;

[0014] Figure 2 The cross-sectional view of the wound surface negative pressure dressing device provided in the embodiments of the present application Figure 1 ;

[0015] Figure 3 The cross-sectional view of the wound surface negative pressure dressing device provided in the embodiments of the present application Figure 2 ;

[0016] Figure 4A sectional view of a part of the energy storage driving device and a part of the pressure regulating device provided for the embodiments of the present application;

[0017] Figure 5 A sectional view of the pressure regulating mechanism provided for the embodiments of the present application;

[0018] Figure 6 A structural schematic view of the fixing device provided for the embodiments of the present application;

[0019] Figure 7 A Figure 6 A sectional view of the fixing device shown.

[0020] In the drawings, various reference numerals refer to:

[0021] 100, wound and trauma negative pressure dressing device; 10, control driving part; 11, mounting piece; 12, drainage driving device; 121, first drainage channel; 13, control device; 20, pressure regulating part; 21, suction pipe; 211, second drainage channel; 22, sensing device; 221, sensing containing piece; 2211, sensing containing space; 222, deformation piece; 223, blocking piece; 2231, first blocking hole; 2232, second blocking hole; 23, energy storage driving device; 231, energy storage containing piece; 2311, energy storage containing space; 232, first driving pipe; 2321, first driving channel; 233, second driving pipe; 2331, second driving channel; 234, third driving pipe; 2341, pressure relief channel; 235, one-way valve; 24, pressure regulating device; 241, pressure regulating mechanism; 2411, regulating containing piece; 24111, regulating containing space; 2412, rotating piece; 24121, first rack part; 2413, plugging assembly; 24131, plugging containing piece; 24132, plugging piece; 24133, elastic piece; 24134, plugging containing space; 24135, second rack part; 242, first communication pipe; 243, second communication pipe; 25, setting piece; 30, collecting part; 31, combination piece; 32, collecting piece; 321, storage containing space; 33, drainage pipe; 331, third drainage channel; 34, fixing device; 341, fixing piece; 342, fitting piece; 343, fixing mechanism; 344, sponge dressing; 345, suction disc film; 3431, fixing pipe; 3432, fixing assembly; 34321, conveying piece; 34322, swelling piece; 34323, fixing containing space; 34324, first deformation space; 34325, second deformation space; 3433, booster. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The description and the drawings of this application together with the above general description are intended to provide further description of the application.

[0024] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0027] In the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships; for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0028] It should be noted that the words "in some embodiments", "exemplary", "for example", etc. in the present application are used to represent an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "exemplary", "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the use of "in some embodiments", "exemplary", "for example" and the like is intended to present the relevant concept in a specific way, meaning that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of the above words in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] The wound surface negative pressure dressing device can be used for treating slow cleaning of recovered wounds. After the wound is closed, the effusion, bacteria and other substances in the wound are discharged outside the body through the drainage tube by the negative pressure source, the wound is kept isolated from the outside world, the tension of the wound is reduced, external bacteria are prevented from infecting the wound, and blood circulation is accelerated and blood supply is increased under negative pressure, thereby facilitating the recovery of the wound.

[0030] However, the negative pressure source of the traditional wound surface negative pressure dressing device usually has a fixed suction speed or switches between multiple different speed gears to suck air to form negative pressure. However, the negative pressure source may cause the negative pressure value in the wound to decrease when the volume in the wound increases due to sudden transient activity of the patient due to the fixed suction speed or the inability to timely adjust the suction speed, thereby causing problems such as the effusion being unable to be effectively drained and discharged outside the body, external bacteria entering the inside of the wound through the gap between the dressing edge or the drainage tube, and infection. Or, when the volume in the wound decreases due to sudden transient activity of the patient, the negative pressure value in the wound increases, thereby causing problems such as reduced local blood perfusion, and obvious traction pain and swelling pain of the patient.

[0031] Based on this, in order to improve the problem in the related art that the volume in the wound changes due to sudden activity of the patient, but the negative pressure source causes fluctuations in the pressure in the wound due to the fixed suction speed or the inability to timely adjust the suction speed, thereby being not conducive to the recovery of the patient, the present application embodiments provide the following solutions.

[0032] Please refer to Figures 1 to 3 The present application embodiment provides a wound surface negative pressure dressing device 100, which comprises a control driving part 10, a pressure regulating part 20 and a collection part 30.

[0033] The control driving part 10 has a first drainage channel 121 and an air inlet end connected with the first drainage channel 121.

[0034] The pressure regulating part 20 is arranged on the control driving part 10 and has a second drainage channel 211, one end of which is connected with the first drainage channel 121.

[0035] The collection part 30 is detachably arranged on the control driving part 10 and has a third drainage channel 331 and a storage containing space 321, one end of the third drainage channel 331 is connected with the storage containing space 321, the other end of the third drainage channel 331 is used to be fixed with the wound of the patient, the storage containing space 321 is connected with the other end of the second drainage channel 211; the collection part 30 includes a sponge dressing 344 and a suction disc film 345, the suction disc film 345 is used to fix the sponge dressing 344 with the wound of the patient.

[0036] The control driving part 10 is used to form a negative pressure in the storage containing space 321 through the air inlet, the first drainage channel 121 and the second drainage channel 211 so that the storage containing space 321 can attract the effusion of the wound into the storage containing space 321 through the third drainage channel 331, and the pressure regulating part 20 is used to release the pressure or increase the negative pressure when the pressure in the storage containing space 321 fluctuates.

[0037] It can be understood that the control driving part 10 is the source of negative pressure, and through the cooperation of the airway structure and other components, it provides stable negative pressure power for the whole system. For example, the control driving part 10 can include a control part (embedded controller, programmable logic controller, etc.) and a driving part (diaphragm pump, vacuum pump, etc.) with the first drainage channel 121 and the air inlet, the control part is in communication connection with the driving part, and the control part is used to control the driving part 10 to work to generate appropriate negative pressure in the storage containing space 321 so as to drain the effusion of the wound of the patient through the third drainage channel 331.

[0038] The pressure regulating part 20 is a device that can timely adjust the pressure in the storage containing space 321 when the volume in the wound changes and the pressure fluctuates due to the instantaneous activity of the patient, and maintain the stability of the negative pressure. For example, the pressure regulating part 20 can include a connecting pipe (PVC pipe, silica gel pipe, etc.), a pressure increasing part (vacuum pump, diaphragm pump, etc.) and a pressure releasing part (electronic pressure relief valve, pneumatic pressure relief valve, etc.), the connecting pipe has the second drainage channel 211, the pressure increasing part and the pressure releasing part can be respectively in communication connection with the control driving part 10 and arranged on the control driving part 10, and connected with the storage containing space 321, the pressure increasing part is used to receive the control signal sent by the control driving part 10 to increase or decrease the pressure in the storage containing space 321.

[0039] The collection part 30 is a device capable of fixing itself to a patient's wound, draining and storing effusion. For example, the collection part 30 can include a drainage tube 33 (silicone tube, PVC tube, etc.), a disposable storage tank (glass tank, plastic tank, etc.), and a fixing tape (non-woven medical tape, cotton medical tape, etc.), the drainage tube 33 can be provided on the control driving part 10 and has a third drainage passage 331, the disposable storage tank can be detachably provided on the control driving part 10 and has a storage containing space 321, and the fixing tape is used to fix the end of the drainage tube 33 away from the disposable storage tank to the patient's wound.

[0040] As can be seen from the above, the wound surface negative pressure dressing device 100 provided by the embodiment of the application forms an initial negative pressure in the storage containing space 321 of the collection part 30 through the air inlet end of the control driving part 10, the first drainage passage 121 and the second drainage passage 211 of the pressure regulating part 20 in sequence, and the initial negative pressure acts on the wound through the third drainage passage 331, so that the effusion of the wound flows into the storage containing space 321 along the third drainage passage 331 under the action of the negative pressure difference. When the volume of the wound increases due to the action of the patient and the pressure in the storage containing space 321 decreases, the control driving part 10 is automatically increased by the pressure regulating part 20 to increase the negative pressure value in the storage containing space 321; when the volume of the wound decreases due to the action of the patient and the pressure in the storage containing space 321 increases, the pressure in the storage containing space 321 is automatically released by the pressure regulating part 20, thereby improving the problem that the volume of the wound changes due to sudden activity of the patient, but the pressure in the wound fluctuates due to the fixed suction speed of the negative pressure source (control driving part 10) or the delay in adjusting the suction speed (delay from pressure monitoring to control suction speed change), which is not conducive to the recovery of the patient.

[0041] In some embodiments, the suction disc film 345 includes an inner layer and an outer layer.

[0042] The inner layer is an absorption resin layer with a three-dimensional network structure constructed by taking sodium polyacrylate as the main body and adding a crosslinking agent, which is used to contact the patient's skin.

[0043] The outer layer is a silver-containing antibacterial foam layer formed by foaming a polyethylene matrix and nano-silver particles, which is provided on the side of the inner layer away from the patient's skin.

[0044] It can be understood that the inner layer can be an absorption resin layer mainly composed of sodium polyacrylate with a molecular weight of 8-12 million, and adding 0.3-0.5wt% of crosslinking agent N, N'-methylene bisacrylamide to construct a three-dimensional network structure, the thickness can be 0.20±0.03mm, the water absorption rate of the inner layer is ≥1500g / g (in line with GB / T6684 standard, distilled water absorption test), the moisture permeability is ≤5g / (m²·24h) (in line with GB / T12704 standard, 38℃ / 90%RH environment), the surface resistivity is ≤1×10 6 Ω (in line with ASTM D257 standard), which can realize the antistatic function.

[0045] The outer layer can be a silver-containing antibacterial foam layer formed by blending and foaming a polyethylene matrix with a mass fraction of 99.5% and nano-silver particles with a mass fraction of 0.5% and a particle size of 20-50nm, and the thickness can be 0.30±0.05mm.

[0046] The inner layer and the outer layer are compounded by a hot pressing process (temperature 80±5℃, pressure 0.8MPa, time 15s), the interlayer bonding strength is ≥1.5N / cm (in line with GB / T2791 standard), and at the same time, a microwave-assisted foaming process (power 300W, foaming time 30s) is adopted, forming a through-pore structure with a pore size of 50-100μm and a porosity of ≥90%. The antibacterial performance of the inner layer and the outer layer is good, the antibacterial rate of Staphylococcus aureus and Escherichia coli is ≥99% (in line with ISO22196 standard, 24h contact test), the electromagnetic shielding effectiveness is 30dB@1GHz (in line with ASTM / D4935 standard), and the antistatic function is realized. The compounding of the inner layer and the outer layer can endow the suction pad film 345 with antibacterial, antistatic and moisture-proof properties, reduce the frequency of replacing the suction pad film 345, and at the same time, the overall bending life of the suction pad film 345 formed by the compounding of the inner layer and the outer layer is ≥5000times (ASTM / D2176, curvature radius 3mm).

[0047] In some embodiments, the suction pad film 345 further comprises a liquid absorption color-changing layer and a structure reinforcing layer.

[0048] The liquid absorption color-changing layer is arranged on the inner layer, and the liquid absorption color-changing layer is a porous sponge structure layer formed by loading acid-base indicator into crosslinked sodium polyacrylate.

[0049] The structure reinforcing layer is arranged on the side of the liquid absorption color-changing layer close to the patient's skin, and is used for directing the seepage to the liquid absorption color-changing layer.

[0050] It can be understood that the liquid absorption color-changing layer takes cross-linked sodium polyacrylate as a base material, the molecular weight of the cross-linked sodium polyacrylate is 15-20 million, the cross-linking degree is 8%-12%, the liquid absorption ratio is ≥300 g / g (in line with GB / T6684 standard, simulated liquid permeation test), and at the same time, the acid-base indicator of the bromocresol purple and phenol red composite system is loaded, the mass ratio is 0.5%-1.2%, the pH response threshold is 5.5-8.5, the color difference ΔE is ≥40 (in line with CIELAB standard, D65 light source), the indicator is loaded by a vacuum impregnation method, the vacuum degree is -0.095 MPa, and the impregnation time is 20 min, so that the uniformity of the indicator distribution CV≤8% can be realized; at the same time, the ultraviolet curing protective layer (wavelength 385 nm, intensity 100 mW / cm²) with a thickness of 50 μm is arranged to prevent the indicator from migrating. The liquid absorption color-changing layer also has a porous sponge structure, the pore size is 100-300 μm, the porosity is ≥92%, and the liquid absorption rate is ≥5 ml / cm²·min. The color-changing response time of the liquid absorption color-changing layer is ≤60 s (the hue value H changes ≥50° after contacting the simulated permeate, in line with ASTMD2244 standard), the liquid absorption saturation time is 30±5 min (the saturated liquid absorption amount is ≥25 ml / cm²), and the dynamic monitoring performance is realized. In terms of antibacterial performance, the surface of the liquid absorption color-changing layer can load nano zinc oxide (mass fraction 0.8%) with a particle size of 50 nm, the antibacterial rate on Staphylococcus aureus is ≥99.9% (in line with ISO20743 standard), and the exudate residual amount is ≤2% (tested by a centrifugal method, conditions: 3000 rpm / 10 min).

[0051] The structure reinforcing layer is made of polyurethane elastomer (TPU) with a Shore hardness of 80A, and S-shaped micro-channels (width 0.5 mm, depth 0.3 mm, and curvature radius 0.8 mm) are arranged on the structure reinforcing layer, the contact area is increased by 180% compared with a traditional straight incision, the S-shaped micro-channels are formed by laser etching technology, the parameters are wavelength 355 nm, power 20 W, and scanning speed 500 mm / s, and the pore size distribution is controlled by CO2 supercritical foaming, the conditions are temperature 160°C, pressure 15 MPa, and foaming time 30 s. The structure reinforcing layer is also provided with a gradient hydrophobic coating, the contact angle is transitioned from 110° on the outer layer to 30° on the inner layer, the gradient length is 2 mm, and the gradient hydrophobic coating can direct the flow of liquid to the liquid absorption layer.

[0052] In addition, the suction cup film 345 composed of the liquid absorption color-changing layer and the structure reinforcing layer meets the cytotoxicity requirement of ISO10993-5, and the survival rate of L929 cells is ≥95%; the air permeability of the interface between the film and the skin is ≥800 g / m²·24h (in line with ASTME96 standard).

[0053] Exemplarily, the suction disc adhesive film 345 is improved for fixing the adhesive tape for the wound when covering the patient's skin, and a tension-reducing fixing patch is added to the main body of the adhesive tape. The base material of the main adhesive tape is a medical-grade polyurethane film with a thickness of 0.15±0.02 mm, and the surface is coated with an acrylate pressure-sensitive adhesive with an adhesive force of ≥1.2 N / cm (in accordance with the GB / T2792 standard). The tension-reducing fixing patch is formed by blending elastic silicone (Shore hardness 10A) and polydimethylsiloxane tackifier (3-5 wt%), and is in the form of a ring-shaped wavy array (wavelength 4 mm, wave amplitude 1.5 mm) and is distributed radially around the wound area (spacing 8 mm).

[0054] The mechanical properties of the fixing adhesive tape are as follows: in terms of tensile properties, the elongation at break is ≥150% (in accordance with the ASTM D412 standard), and through finite element simulation (load 2 N / cm²) testing, the local stress of the skin can be reduced by 60%; in terms of adhesion stability, the holding force attenuation is ≤15% within 72 hours (in accordance with the GB / T4851 standard), and the peel strength retention rate is ≥85% under a humid heat environment (40℃ / 90%RH). In addition, its air permeability is water vapor transmission rate ≥800 g / m²·24h (in accordance with the ASTM E96 standard); in terms of biocompatibility, it has passed the ISO 10993-10 skin irritation test, and the test results show that the erythema index is ≤0.4.

[0055] In some embodiments, referring to Figures 1 to 3 , the control driving part 10 includes a mounting part 11, a drainage driving device 12, and a control device 13.

[0056] The drainage driving device 12 is arranged on the mounting part 11 and has a first drainage passage 121 and an air inlet end.

[0057] The control device 13 is arranged on the mounting part 11 and is in communication connection with the drainage driving device 12.

[0058] The control device 13 is used to control the drainage driving device 12 to form a negative pressure in the storage containing space 321 through the air inlet end, the first drainage passage 121, and the second drainage passage 211. The pressure regulating part 20 is arranged on the mounting part 11, and the collection part 30 is detachably arranged on the mounting part 11.

[0059] It can be understood that the mounting part 11 is used to fix and position, ensuring the stability of the position of each component in operation. For example, the material of the mounting part 11 can be plastic, aluminum alloy, etc., but is not limited thereto.

[0060] The drainage driving device 12 cooperates with other components through its own airway structure and generates stable negative pressure under the instruction of the control device 13 to provide power for fluid drainage, and has an air outlet end. For example, the drainage driving device 12 can be a diaphragm pump, a vacuum pump, etc., but is not limited thereto.

[0061] The control device 13 controls the generation of negative pressure by communicating with the drainage driving device 12, and monitors the pressure in the storage containing space 321 in real time (by a sensor (piezoresistive pressure sensor, capacitive pressure sensor, etc.) located in the storage containing space 321 or the second drainage channel 211, and in communication with the control device 13). For example, the control device 13 can be an embedded controller, a programmable logic controller, etc., but is not limited thereto.

[0062] In this way, the drainage driving device 12 is controlled by the control device 13 to draw air through the air inlet end and form a negative pressure in the first drainage channel 121, and the negative pressure is transmitted to the wound through the second drainage channel 211, the storage containing space 321 and the third drainage channel 331, and the drainage of the effusion is started.

[0063] For example, the control device 13 can include a control mechanism (embedded controller, programmable logic controller, etc.), a sensor (piezoresistive pressure sensor, capacitive pressure sensor, etc.), a display screen (LCD screen, OLED screen, etc.), a threshold indicator light (red LED light), and a plurality of function keys (plastic keys, silicone keys). The control mechanism, the display screen and the function keys can be respectively arranged on the mounting member 11, the sensor can be located in the second drainage channel 211 and in communication with the control mechanism for monitoring the pressure in the storage containing space 321, the display screen is in communication with the control mechanism for displaying the pressure in the storage containing space 321 and the working mode of the drainage driving device 12, the threshold indicator light is used to light up when the negative pressure is abnormal to facilitate the operator to observe the equipment state, each function key is used to send a control instruction to the control mechanism when pressed, at least one function key corresponds to a control instruction for controlling the drainage driving device 12 to increase the suction speed, at least one function key corresponds to a control instruction for controlling the drainage driving device 12 to reduce the suction speed, at least one function key corresponds to a control instruction for controlling the drainage driving device 12 to switch between the two working modes (continuous suction mode (negative pressure value adjustment range is 40mmHg-140mmHg, single adjustment amount is 20mmHg, negative pressure value error ±10%) and intermittent suction mode (negative pressure value adjustment range is 40mmHg-140mmHg, single adjustment amount is 20mmHg. In the intermittent mode, the drainage driving device 12 reduces the pressure in the storage containing space 321 to 0mmHg after the pressure reaches the set value and lasts for 5 minutes, and the cycle time is fixed and cannot be adjusted)), and at least one function key corresponds to a control instruction for controlling the drainage driving device 12 to start or stop working.

[0064] In some embodiments, please refer to Figures 1 to 3The pressure regulating part 20 comprises a setting part 25, an air extraction pipe 21, a sensing device 22, an energy storage driving device 23 and a pressure regulating device 24.

[0065] The setting part 25 is arranged on the control driving part 10.

[0066] The air extraction pipe 21 is arranged on the setting part 25 and has a second flow channel 211.

[0067] The sensing device 22 is arranged on the setting part 25 and has a sensing accommodation space 2211 which is in communication with the second flow channel 211.

[0068] The energy storage driving device 23 is arranged on the setting part 25 and connected with the sensing device 22, and has an energy storage accommodation space 2311, a pressure relief channel 2341, a first driving channel 2321 and a second driving channel 2331. The energy storage accommodation space 2311 is in communication with the air outlet of the control driving part 10. The two ends of the pressure relief channel 2341 are in communication with the energy storage accommodation space 2311 and the outside respectively. The two ends of the first driving channel 2321 and the second driving channel 2331 are connected with the energy storage accommodation space 2311 and the outside respectively.

[0069] The pressure regulating device 24 is arranged on the setting part 25 and has a first auxiliary channel and a second auxiliary channel. The two ends of the first auxiliary channel are in communication with the air inlet and the storage accommodation space 321 respectively. The two ends of the second auxiliary channel are in communication with the second flow channel 211 and the pressure relief channel 2341 respectively.

[0070] The control driving part 10 is used to deliver air to the energy storage accommodation space 2311 through the air outlet to form positive pressure in the energy storage accommodation space 2311. The sensing device 22 is used to open the first driving channel 2321 to release the pressure in the energy storage accommodation space 2311 to the outside through the first driving channel 2321 and drive the pressure regulating device 24, so that the pressure regulating device 24 opens the first auxiliary channel to make the air inlet in communication with the storage accommodation space 321 through the first auxiliary channel, or opens the second driving channel 2331 to release the pressure in the energy storage accommodation space 2311 to the outside through the second driving channel 2331 and drive the pressure regulating device 24, so that the pressure regulating device 24 opens the second auxiliary channel to make the second flow channel 211 in communication with the pressure relief channel 2341 through the second auxiliary channel.

[0071] It can be understood that the setting part 25 is a box structure which can be arranged on the mounting part 11. For example, the setting part 25 can be a plastic box, an aluminum box and the like but is not limited thereto.

[0072] The air extraction pipe 21 is a tubular structure which can be arranged on the mounting part 11. For example, the air extraction pipe 21 can be a hollow metal pipe, a high-strength plastic pipe and the like but is not limited thereto.

[0073] The sensing device 22 communicates with the second drainage channel 211 to monitor the pressure change in the storage containing space 321 in real time, and makes corresponding actions according to the rise or fall of the pressure. For example, the sensing device 22 can include a sensor (piezoresistive pressure sensor, capacitive pressure sensor, etc.), a driving motor (stepping motor, servo motor, etc.), and a partition plate (plastic plate, aluminum plate, etc.), the sensor is located in the second drainage channel 211 and is in communication connection with the driving motor, the driving motor can be provided on the mounting piece 11, the partition plate can be provided on the driving shaft of the driving motor, and the driving motor is used to drive the partition plate to rotate when the sensor detects pressure fluctuation, so that the first driving channel 2321 or the second driving channel 2331 blocked by the partition plate is opened.

[0074] The energy storage driving device 23 is a device capable of storing positive pressure power, rapidly releasing driving pressure to trigger the sensing device 22, and adjusting the action of the pressure regulating device 24. The communication mode between the energy storage containing space 2311 and the gas outlet can be connected through a pipeline, or connected through a hole opened on the mounting piece 11, but not limited to this. For example, the energy storage driving device 23 can include an energy storage box (plastic box, aluminum box, etc.) and at least three connecting pipes (metal pipes, plastic pipes, etc.), the energy storage box has an energy storage containing space 2311 and can be provided on the mounting piece, the connecting pipes can be provided on the energy storage box, and the three connecting pipes respectively have a pressure relief channel 2341, a first driving channel 2321 and a second driving channel 2331.

[0075] The pressure regulating device 24 is a device capable of opening the first auxiliary channel or the second auxiliary channel to complete the action of increasing negative pressure or pressure relief, so as to realize the pressure regulation in the storage containing space 321. For example, the pressure regulating device 24 can include a rotating wheel (fan-shaped connecting plate gear, spiral fin wheel, etc.), two partition plates (plastic plate, aluminum plate, etc.) and two connecting pipes (plastic pipe, aluminum pipe, etc.), the rotating wheel is rotatably provided on the mounting piece 11, the partition plates are movably provided on the mounting piece 11 and partially located in the connecting pipes, and are in transmission connection with the rotating wheel, the two connecting pipes respectively have a first auxiliary channel and a second auxiliary channel, and the rotating wheel is used to receive the power output by the energy storage driving device 23 through the first driving channel 2321 or the second driving channel 2331 to rotate clockwise or counterclockwise, so as to drive one of the two connecting pipes to open the first auxiliary channel or the second auxiliary channel.

[0076] In this way, the energy storage driving device 23 receives the air output from the air outlet through the energy storage accommodating space 2311 and forms a positive pressure in the energy storage accommodating space 2311. When the wound volume increases, the sensing device 22 opens the first driving channel 2321 to release the pressure in the energy storage accommodating space 2311 through the first driving channel 2321 and drive the pressure regulating device 24, so that the pressure regulating device 24 opens the first auxiliary channel to connect the air inlet with the storage accommodating space 321 through the first auxiliary channel, thereby increasing the air extraction amount of the drainage driving device 12. When the wound volume decreases, the sensing device 22 opens the second driving channel 2331 to release the pressure in the energy storage accommodating space 2311 through the second driving channel 2331 and drive the pressure regulating device 24, so that the pressure regulating device 24 opens the second auxiliary channel to connect the second drainage channel 211 with the pressure relief channel 2341 through the second auxiliary channel, so that the pressure in the second auxiliary channel is released through the pressure relief channel 2341.

[0077] In some embodiments, referring to Figures 1 to 3 , the sensing device 22 includes a sensing accommodating member 221, a deformation member 222, and a blocking member 223.

[0078] The sensing accommodating member 221 is arranged on the arrangement member 25 and is provided with a sensing hole communicating with the second drainage channel 211.

[0079] The deformation member 222 is arranged on the sensing accommodating member 221 in a deformable manner and forms a sensing accommodating space 2211 together with the sensing accommodating member 221. The sensing accommodating space 2211 communicates with the second drainage channel 211 through the sensing hole.

[0080] The blocking member 223 is movably arranged on the sensing accommodating member 221 and is connected with the deformation member 222. The blocking member 223 is provided with a first blocking hole 2231 and a second blocking hole 2232.

[0081] The deformation member 222 is configured to, when the pressure in the storage accommodating space 321 is normal, drive the blocking member 223 to block the first driving channel 2321 and the second driving channel 2331, when the negative pressure in the storage accommodating space 321 decreases, contract to drive the blocking member 223 to move, so that the first blocking hole 2231 is close to the first driving channel 2321 and the energy storage accommodating space 2311 is connected with the outside through the first driving channel 2321, and when the negative pressure in the storage accommodating space 321 increases, expand to drive the blocking member 223 to move reversely, so that the second blocking hole 2232 is close to the second driving channel 2331 and the energy storage accommodating space 2311 is connected with the outside through the second driving channel 2331.

[0082] It can be understood that the induction accommodating member 221 is a box-shaped structure capable of fixing the deformation member 222 and the blocking member 223, limiting the moving direction of the blocking member 223, and can be arranged on the mounting member 11. For example, the induction accommodating member 221 can be a plastic box, an aluminum box, etc., but is not limited thereto.

[0083] The deformation member 222 is a thin film structure capable of converting the change of the air pressure of the induction accommodating space 2211 into the mechanical displacement of the blocking member 223 by deforming itself. For example, the deformation member 222 can be a copper alloy diaphragm, a rubber diaphragm, etc., but is not limited thereto.

[0084] The blocking member 223 is a plate-shaped structure capable of realizing the opening or closing of the first driving channel 2321 or the second driving channel 2331 by following the movement of the deformation member 222, thereby determining the power release path of the energy storage driving device 23. For example, the blocking member 223 can be a plastic plate, an aluminum plate, etc., but is not limited thereto. The first driving channel 2321 and the second driving channel 2331 can be located between the first blocking hole 2231 and the second blocking hole 2232.

[0085] In this way, when the pressure in the storage containing space 321 is within the preset pressure range (normal pressure), the deformation member 222 does not deform, the first driving channel 2321 and the second driving channel 2331 are located between the first blocking hole 2231 and the second blocking hole 2232 and are blocked by the blocking member 223, and the pressure in the storage containing space 321 cannot be released through the first driving channel 2321 or the second driving channel 2331. When the negative pressure in the storage containing space 321 decreases (the volume of the wound increases), the deformation member 222 contracts to drive the blocking member 223 to move, so that the first blocking hole 2231 is close to the first driving channel 2321 and the energy storage containing space 2311 is connected to the outside through the first driving channel 2321, the pressure in the energy storage containing space 2311 is released through the first driving channel 2321 and drives the pressure regulating device 24 to open the first auxiliary channel, so as to increase the air extraction amount of the control driving part 10 to increase the negative pressure in the storage containing space 321. When the negative pressure in the storage containing space 321 increases (the volume of the wound decreases), the deformation member 222 expands to drive the blocking member 223 to move reversely, so that the second blocking hole 2232 is close to the second driving channel 2331 and the energy storage containing space 2311 is connected to the outside through the second driving channel 2331, the pressure in the energy storage containing space 2311 is released through the second driving channel 2331 and drives the pressure regulating device 24 to open the second auxiliary channel, so as to release the pressure in the storage containing space 321 through the second auxiliary channel and the pressure relief channel 2341. The size of the pressure released by the energy storage containing space 2311 is positively correlated with the overlapping area (the overlapping area of the cross section of the first blocking hole 2231 and the first driving channel 2321 or the overlapping area of the cross section of the second blocking hole 2232 and the second driving channel 2331), the larger the overlapping area is, the greater the pressure released by the energy storage containing space 2311 is.

[0086] For example, the deformation member 222 and the sensing containing member 221 can further jointly form a reference containing space, the reference containing space and the sensing containing space 2211 are located on two sides of the deformation member 222 respectively, the reference containing space can be connected to the air inlet end through a reference pipeline (rubber pipe, metal pipe, etc.) arranged on the sensing containing member 221, and the drainage driving device 12 can simultaneously extract air from the reference containing space and the sensing containing space 2211 when starting to work, and after the negative pressure value in the sensing containing space 2211 reaches a preset negative pressure value, the reference pipeline is cut off through an electromagnetic valve arranged on the reference pipeline, so that the reference containing space is not connected to the air inlet end.

[0087] In some embodiments, referring to Figures 1 to 3 , the energy storage driving device 23 includes an energy storage containing member 231, a first driving pipe 232, a second driving pipe 233, a third driving pipe 234, and a one-way valve 235.

[0088] The energy storage container 231 is arranged on the arrangement member 25 and has an energy storage space 2311.

[0089] The first drive pipe 232 is arranged on the energy storage container 231 and has a first drive channel 2321.

[0090] The second drive pipe 233 is arranged on the energy storage container 231 and has a second drive channel 2331.

[0091] The third drive pipe 234 is arranged on the energy storage container 231 and has a pressure relief channel 2341.

[0092] The one-way valve 235 is located in the pressure relief channel 2341 and arranged on the third drive pipe 234.

[0093] The connection between the second auxiliary channel and the pressure relief channel 2341 is located between the end of the pressure relief channel 2341 away from the energy storage space 2311 and the one-way valve 235.

[0094] It can be understood that the energy storage container 231 is a box-shaped structure capable of receiving and storing the air discharged by the control drive part 10 to form a stable positive pressure, providing a basis for subsequent power release, which can be arranged on the mounting member 11. For example, the energy storage container 231 can be a plastic box, an aluminum box, etc., but is not limited thereto.

[0095] The first drive pipe 232, the second drive pipe 233 and the third drive pipe 234 are a tubular structure. For example, the first drive pipe 232, the second drive pipe 233 and the third drive pipe 234 can be metal pipes, plastic pipes, etc., but are not limited thereto. The end of the third drive pipe 234 away from the energy storage container 231 can also be provided with a filter (activated carbon filter device, HEPA filter screen filter device, etc.).

[0096] The one-way valve 235 is a device capable of automatically opening when the pressure in the energy storage space 2311 is greater than the preset pressure relief pressure, which not only prevents external air from flowing back to pollute the energy storage space 2311, but also ensures that the air flow only flows to the outside when pressure relief. For example, the one-way valve 235 can be a pilot-operated one-way valve 235, a direct-acting pressure control one-way valve 235, etc., but is not limited thereto.

[0097] In this way, the air discharged by the control driving part 10 is received and stored by the energy storage accommodating space 2311, and a stable positive pressure is formed in the energy storage accommodating space 2311. When the pressure in the energy storage accommodating space 2311 is too high, the one-way valve 235 is automatically opened to release the pressure in the energy storage accommodating space 2311 through the pressure relief channel 2341, preventing damage to the energy storage accommodating part 231. The pressure in the energy storage accommodating space 2311 is released through the first driving pipe 232 or the second driving pipe 233, thereby driving the pressure regulating device 24 to open the first auxiliary channel or the second auxiliary channel. Driving the pressure regulating device 24 by the pressure in the energy storage accommodating space 2311 instead of by the sensing device 22 can improve the problem that the energy level of pressure fluctuation caused by a small change in the volume of the wound is low, and thus may not be able to overcome the static friction force and spring pre-tightening force inside the mechanical system to directly drive the pressure regulating device 24 to open the first auxiliary channel or the second auxiliary channel.

[0098] In some embodiments, referring to Figures 1 to 3 , the pressure regulating device 24 includes a pressure regulating mechanism 241, a first communication pipe 242, and a second communication pipe 243.

[0099] The pressure regulating mechanism 241 is arranged on the arrangement part 25.

[0100] The first communication pipe 242 is arranged on the arrangement part 25 and has the first auxiliary channel.

[0101] The second communication pipe 243 is arranged on the exhaust pipe 21 and has the second auxiliary channel.

[0102] The pressure regulating mechanism 241 is partially located in the first auxiliary channel and the second auxiliary channel and blocks the first auxiliary channel and the second auxiliary channel. The energy storage driving device 23 is configured to drive the pressure regulating mechanism 241 to open the first auxiliary channel when the pressure in the energy storage accommodating space 2311 is released through the first driving channel 2321, or to drive the pressure regulating mechanism 241 to open the second auxiliary channel when the pressure in the energy storage accommodating space 2311 is released through the second driving channel 2331.

[0103] It can be understood that the pressure regulating mechanism 241 is a device capable of receiving the pressure output by the energy storage driving device 23 to control the opening or closing of the first auxiliary channel and the second auxiliary channel. For example, the pressure regulating mechanism 241 can include a rotating wheel (a fan-shaped connecting plate gear, a spiral fin wheel, etc.), two partition plates (plastic plates, aluminum plates, etc.), and two connecting pipes (plastic pipes, aluminum pipes, etc.), the rotating wheel is rotatably arranged on the mounting member 11, the partition plates are movably arranged on the mounting member 11 and partially located in the connecting pipes, and are in transmission connection with the rotating wheel, the two connecting pipes respectively have the first auxiliary channel and the second auxiliary channel, and the rotating wheel is used to receive the power output by the energy storage driving device 23 through the first driving channel 2321 or the second driving channel 2331 to rotate clockwise or counterclockwise, thereby driving one of the two connecting pipes to open the first auxiliary channel or the second auxiliary channel.

[0104] The first communication pipe 242 and the second communication pipe 243 are a tubular structure. For example, the first communication pipe 242 and the second communication pipe 243 can be metal pipes, plastic pipes, etc., but are not limited thereto.

[0105] In this way, when the energy storage driving device 23 releases pressure through the first driving channel 2321, the pressure regulating mechanism 241 can be driven to open the first auxiliary channel, and when the energy storage driving device 23 releases pressure through the second driving channel 2331, the pressure regulating mechanism 241 can be driven to open the second auxiliary channel, and the opening degree of the first auxiliary channel and the second auxiliary channel is positively correlated with the size of the pressure released by the energy storage containing space 2311. (The greater the pressure released by the energy storage containing space 2311, the greater the opening degree of the first auxiliary channel or the second auxiliary channel).

[0106] In some embodiments, please refer to Figures 1 to 5 , the pressure regulating mechanism 241 includes an adjusting containing member 2411, a rotating member 2412, and two plugging assemblies 2413.

[0107] The adjusting containing member 2411 is arranged on the setting member 25 and has an adjusting containing space 24111, which is in communication with the first driving channel 2321 and the second driving channel 2331.

[0108] The rotating member 2412 is located in the adjusting containing space 24111 and is rotatably arranged on the adjusting containing member 2411 and has a first rack portion 24121.

[0109] The two plugging assemblies 2413 are arranged on the setting member 25 and have a second rack portion 24135 and are respectively partially located in the first auxiliary channel and the second auxiliary channel.

[0110] When the pressure in the energy storage accommodating space 2311 is released through the first driving channel 2321, the rotating member 2412 rotates to make the first rack portion 24121 engage with the second rack portion 24135 of the blocking assembly 2413 located in the first auxiliary channel, thereby driving the blocking assembly 2413 to open the first auxiliary channel. When the pressure in the energy storage accommodating space 2311 is released through the second driving channel 2331, the rotating member 2412 reversely rotates to make the first rack portion 24121 engage with the second rack portion 24135 of the blocking assembly 2413 located in the second auxiliary channel, thereby driving the blocking assembly 2413 to open the second auxiliary channel. When the first driving channel 2321 and the second driving channel 2331 are blocked, the two blocking assemblies 2413 block the first auxiliary channel and the second auxiliary channel, respectively.

[0111] It can be understood that the adjusting accommodating member 2411 is a box structure capable of fixing the rotating member 2412 and providing a space for power transmission. The adjusting accommodating member 2411 can be provided with a hole to make the adjusting accommodating space 24111 communicate with the first driving channel 2321, the second driving channel 2331 and the outside through the hole. For example, the adjusting accommodating member 2411 can be a plastic box, an aluminum box or the like, but is not limited thereto.

[0112] The rotating member 2412 is a device capable of receiving the pressure released from the energy storage accommodating space 2311 through the first driving channel 2321 or the second driving channel 2331, converting the linear power (air flow thrust) input by the energy storage driving device 23 into rotary motion, and transmitting the rotary motion to the blocking assembly 2413 through rack engagement. For example, the rotating member 2412 can be a fan-shaped connecting plate gear, a spiral fin wheel or the like, but is not limited thereto.

[0113] The blocking assembly 2413 is a device capable of achieving linear movement through rack engagement with the rotating member 2412, and completing the opening or blocking of the first auxiliary channel and the second auxiliary channel. For example, the blocking assembly 2413 can be a plastic plate, an aluminum plate or the like, but is not limited thereto.

[0114] When the pressure in the energy storage accommodating space 2311 is released through the first driving channel 2321, the driving rotating member 2412 rotates to drive the first rack portion 24121 to engage with the second rack portion 24135 of the blocking assembly 2413 located in the first auxiliary channel, thereby driving the blocking assembly 2413 to move to open the first auxiliary channel. When the pressure in the energy storage accommodating space 2311 is released through the second driving channel 2331, the driving rotating member 2412 rotates reversely to drive the first rack portion 24121 to engage with the second rack portion 24135 of the blocking assembly 2413 located in the second auxiliary channel, thereby driving the blocking assembly 2413 to open the second auxiliary channel. When the pressure in the energy storage accommodating space 2311 is not released through the first driving channel 2321 and the second driving channel 2331, the two blocking assemblies 2413 block the first auxiliary channel and the second auxiliary channel, respectively.

[0115] In some embodiments, referring to Figure 4 and Figure 5 the blocking assembly 2413 comprises a blocking accommodating member 24131, a blocking member 24132 and an elastic member 24133.

[0116] The blocking accommodating member 24131 is arranged on the arrangement member 25 and has a blocking accommodating space 24134 connected with the first auxiliary channel or the second auxiliary channel.

[0117] The blocking member 24132 is located in the blocking accommodating space 24134 and has a second rack portion 24135, and is movably arranged on the blocking accommodating member 24131 and partially located in the first auxiliary channel or the second auxiliary channel.

[0118] The elastic member 24133 is located in the blocking accommodating space 24134, and two ends of the elastic member 24133 are connected with the blocking member 24132 and the blocking accommodating member 24131, respectively, for providing elastic force to make the blocking member 24132 close to the first auxiliary channel or the second auxiliary channel.

[0119] The pressure in the energy storage accommodating space 2311 drives the rotating member 2412 to rotate to drive the blocking member 24132 engaged with the first rack portion 24121 through the second rack portion 24135 to move and compress the elastic member 24133, thereby opening the first auxiliary channel or the second auxiliary channel.

[0120] It can be understood that the blocking accommodating member 24131 is a tubular structure capable of fixing the elastic member 24133 and the blocking member 24132, and a guide groove can be formed on the blocking accommodating member 24131 to limit the moving direction of the blocking member 24132. For example, the blocking accommodating member 24131 can be a plastic tube, an aluminum tube, etc., but is not limited thereto.

[0121] The blocking member 24132 is a plate-shaped structure capable of moving axially along the guide groove of the blocking accommodating member 24131. For example, the blocking member 24132 can be a plastic plate, an aluminum plate, or the like, but is not limited thereto.

[0122] The elastic member 24133 is a spring capable of achieving normal blocking and resetting of the blocking member 24132 after power loss. The elastic force generated by pre-compression continuously pushes the blocking member 24132 to adhere to the first auxiliary passage or the second auxiliary passage, ensuring reliable sealing without power. For example, the elastic member 24133 can be a compression spring, a torsion spring, or the like, but is not limited thereto.

[0123] In this way, when the rotating member 2412 does not rotate and the first rack portion 24121 is not engaged with the second rack portion 24135, the elastic member 24133 applies an axial pushing force to the blocking member 24132 to make the blocking member 24132 adhere to the first auxiliary passage or the second auxiliary passage. When the rotating member 2412 rotates and the first rack portion 24121 is engaged with the second rack portion 24135, the rotating member 2412 drives the blocking member 24132 engaged with the first rack portion 24121 to move and compress the elastic member 24133, thereby opening the first auxiliary passage or the second auxiliary passage. After the first driving passage 2321 and the second driving passage 2331 are blocked, the elastic member 24133 in the compressed state recovers, drives the blocking member 24132 to move and block the first auxiliary passage or the second auxiliary passage, and drives the engaged rotating member 2412 to rotate to reset the rotating member 2412.

[0124] In some embodiments, referring to Figure 6 and Figure 7 , the collecting part 30 includes an assembly 31, a collecting member 32, a drainage tube 33, and a fixing device 34.

[0125] The assembly 31 is detachably arranged on the control driving part 10 and is provided with a collecting hole.

[0126] The collecting member 32 is detachably arranged on the assembly 31 and has a storage accommodating space 321.

[0127] The drainage tube 33 is arranged on the assembly 31 and has a third drainage passage 331, and the storage accommodating space 321 is in communication with the third drainage passage 331 through the collecting hole.

[0128] The fixing device 34 is movably arranged on the drainage tube 33 and has a fixing hole, and the fixing device 34 is fixed to the drainage tube 33 through the fixing hole.

[0129] It can be understood that the assembly 31 is a box structure capable of realizing the butt joint and communication of the storage containing space 321 and the second drainage channel 211 and the third drainage channel 331, and can be detachably arranged on the mounting member 11. For example, the assembly 31 can be a plastic box structure, an aluminum box structure, etc., but is not limited thereto. The connection mode of the assembly 31 and the control driving part 10 can be through snap connection, but is not limited thereto.

[0130] The collection member 32 is a bottle structure with a detachable design, which is used to collect the effusion of the wound of the patient. For example, the collection member 32 can be a plastic bottle, a glass bottle, etc., but is not limited thereto. The collection member 32 can be provided with a hole to enable the second drainage channel 211 to pass through the hole and communicate with the storage containing space 321.

[0131] The drainage tube 33 is a tubular structure capable of draining the effusion of the wound to the storage containing space 321, while ensuring that the negative pressure acts on the wound. For example, the drainage tube 33 can be a silica gel tube, a plastic tube, etc., but is not limited thereto.

[0132] For example, the drainage tube 33 can be composed of a polyurethane foam base and a surface functional layer, wherein a gradient pore size porous network is formed inside the base, the core layer has a pore size of 50±10 μm, the transition layer has a pore size of 80±15 μm, and the surface layer has a pore size of 200±30 μm, and the overall porosity is ≥85%. The surface functional layer is loaded with an antibacterial coating of 0.5-1.2 μm thick through a plasma deposition process, and the coating contains 15% of cetyltrimethylammonium bromide by mass fraction. The Shore hardness of the tube body is controlled to be 30HA±2 (in accordance with the standard ASTM D2240), and the compression modulus is 0.08-0.12 MPa. The drainage tube 33 can be provided with an anti-kinking spiral reinforcing rib (pitch 3 mm, height 0.3 mm) to make the critical bending angle >120°, and the bending life is ≥1000 times (in accordance with the standard ASTM D430, with a test curvature radius of 5 mm). The inner diameter of the drainage tube 33 can be 5.0 mm±0.1 mm, and the surface is hydrophilically modified (contact angle ≤25°, in accordance with the standard GB / T30693). Under the condition of 10 kPa negative pressure, when the viscosity of the simulated body fluid is 3.5 mPa·s, a stable flow rate of ≥35 ml / min can be realized.

[0133] The fixing device 34 is a disc-shaped structure capable of fixing the drainage tube 33 to the wound to avoid the deviation and dislocation of the drainage tube 33 due to the movement of the patient. The drainage tube 33 passes through the fixing hole and is in interference fit with the fixing hole. For example, the fixing device 34 can be a medical adhesive tape, an elastic gauze, etc., but is not limited thereto.

[0134] In this way, the fixing device 34 is preliminarily fixed to the wound of the patient, and then the suction disc adhesive film 345 is further used to fix the fixing device 34 to the wound of the patient, and then the drainage tube 33 is moved to make one end of the drainage tube 33 located in the space formed by the suction disc adhesive film 345 and the skin of the patient, so that the drainage tube 33 is fixed to the wound. When the accumulated liquid in the storage space 321 needs to be cleaned, the assembly 31 is first separated from the control driving part 10, and then the collection part 32 is separated from the assembly 31, and then a new collection part 32 is fixed to the assembly 31, and then the assembly 31 is fixed to the control driving part 10.

[0135] For example, the collection part 30 further comprises a wound stay. The wound stay is used to be attached to the two sides of the wound to close the skin on the two sides of the wound.

[0136] It can be understood that the sponge dressing 344 is a wound care product made of medical porous material (such as polyurethane, polyethylene, alginate, etc.) and having a three-dimensional network structure. The sponge dressing 344 is detachably arranged on the fixing device 34 and used to cover the wound of the patient, so as to quickly absorb the exudate through the porous structure, avoid the exudate from accumulating to stimulate the skin, maintain a moist environment for the wound, promote the growth of epithelial cells, and accelerate the healing speed of the wound.

[0137] The wound stay is a device capable of closing the skin on the two sides of the wound by elastic tension, reducing the tension of the wound, and cooperating with the negative pressure environment to accelerate the healing of the wound. For example, the wound stay can be an elastic wound stay, a waterproof wound stay, etc., but is not limited thereto.

[0138] In this way, before the drainage tube 33 is fixed to the wound of the patient, the skin on the two sides of the wound can be closed by the wound stay to reduce the tension of the edge of the wound. After the fixing device 34 is fixed to the wound, the fixing device 34 and the wound can be covered by the suction disc adhesive film 345 to form a double seal, so that the wound is isolated from the outside, and the sponge dressing 344 coated with medicine is fixed between the wound and the suction disc adhesive film 345 to assist the healing of the wound.

[0139] In some embodiments, referring to Figure 6 and Figure 7 , the fixing device 34 comprises a fixing part 341, a plurality of adhesive parts 342, and a fixing mechanism 343.

[0140] The fixing part 341 is movably arranged on the drainage tube 33 and has a fixing hole.

[0141] The plurality of adhesive parts 342 are rotatably arranged on one side of the fixing part 341 close to the wound of the patient.

[0142] The fixing mechanism 343 is arranged on the fixing member 341 and between the fixing member 341 and each of the adhering members 342, and has a fixing accommodation space 34323.

[0143] The adhering member 342 is used to adhere to the skin of the patient to drive the fixing member 341 to deform, and the fixing mechanism 343 is used to deform to fix the angle of each of the adhering members 342 when the pressure in the fixing accommodation space 34323 is increased, so as to fix the posture of the fixing member 341.

[0144] It can be understood that the fixing member 341 is a disc-shaped structure capable of bearing the adhering members 342 and the fixing mechanism 343, and capable of forming a stable connection with the drainage tube 33 through the fixing hole, and the fixing member 341 is deformable. The side of the fixing member 341 facing the wound can be provided with a plurality of rotating shaft seats, and the adhering members 342 are matched with the rotating shaft seats to realize rotation. The sponge dressing 344 can be arranged on the fixing member 341. For example, the fixing member 341 can be a nylon disc-shaped structure, a silica gel disc-shaped structure, etc., but is not limited thereto. The sponge dressing 344 and the suction disc film 345 can be detachably arranged on the fixing member 341. After the fixing member 341 is fixed to the skin of the patient through the adhering members 342, the sponge dressing 344 is fixed to the wound of the patient through the suction disc film 345, and the fixing member 341 is further fixed to the wound of the patient.

[0145] The adhering member 342 is a plate-shaped sheet capable of being independently rotated to adapt to different skin curves, and ensuring that the fixing member 341 is fixed to the skin around the wound. The side of the adhering member 342 facing the wound can have adhesion (coated with medical adhesive). For example, the adhering member 342 can be a silica gel plate-shaped sheet, a plastic plate-shaped sheet, etc., but is not limited thereto.

[0146] The fixing mechanism 343 is a device capable of locking the fitting angle of the adhering member 342 after the adhering member 342 is fitted to the skin curve. For example, the fixing mechanism 343 can be an aluminum wire, a copper wire, etc., but is not limited thereto.

[0147] In this way, after the fixing member 341 is in contact with the skin around the wound through each of the adhering members 342, and is fitted to the skin curve through rotation and adhesion, the end of the drainage tube 33 close to the wound is moved to a suitable position (between the wound and the sponge dressing 344) and is fixed to the wound by pulling the drainage tube 33, and the fitting angle of each of the adhering members 342 is locked by the fixing mechanism 343 after the adhering members 342 are adhered to the skin and drive the fixing member 341 to deform, so as to avoid that the patient moves or the fixing member 341 restores (returns to a flat disc shape) under the influence of its own elasticity, and thus pulls the adhering member 342 away from the skin of the patient, causing the adhering member 342 to fall off the skin of the patient, and causing the drainage tube 33 to be separated.

[0148] In some embodiments, please refer to Figure 6 and Figure 7 The fixing mechanism 343 includes a fixing tube 3431, a plurality of fixing assemblies 3432, and a pressure boosting device 3433.

[0149] The fixing tube 3431 is arranged on the fixing member 341 and has a pressure boosting channel.

[0150] The fixing assembly 3432 is arranged on the fixing member 341 in a deformable manner and is uniformly arranged along the circumference of the fixing member 341. The fixing assembly 3432 includes a plurality of first deformation spaces 34324 and a plurality of second deformation spaces 34325. The first deformation spaces 34324 and the second deformation spaces 34325 are alternately arranged along the radial direction of the fixing member 341 and are in communication with each other, and are in communication with the pressure boosting channel.

[0151] The pressure boosting device 3433 is detachably arranged on the fixing tube 3431 and is used to boost the first deformation spaces 34324 and the second deformation spaces 34325 through the pressure boosting channel.

[0152] The pressure boosting channel, each first deformation space 34324, and each second deformation space 34325 collectively form a fixing containing space 34323. The first deformation spaces 34324 and the second deformation spaces 34325 are used to deform to fix the angle of each fitting member 342 and thus fix the posture of the fixing member 341 when the pressure in the fixing containing space 34323 increases.

[0153] It can be understood that the fixing tube 3431 is a tubular structure. For example, the fixing tube 3431 can be a plastic tube, a silica gel tube, etc., but is not limited thereto.

[0154] The fixing assembly 3432 is a device capable of converting pressure into supporting force on the fitting member 342 through the coordinated deformation of the first deformation space 34324 and the second deformation space 34325, and achieving angle locking. For example, the material of the fixing assembly 3432 can be medical elastic rubber, elastic plastic, etc., but is not limited thereto.

[0155] The pressure boosting device 3433 is a device capable of manually or semi-automatically inputting pressure to the fixing tube 3431, and providing power for the deformation of the first deformation space 34324 and the second deformation space 34325. For example, the pressure boosting device 3433 can be a manual air bag, an electric air pump, etc., but is not limited thereto.

[0156] In this way, after each fitting member 342 is attached to the skin, the pressure boosting device 3433 is driven to boost the first deformation space 34324 and the second deformation space 34325 through the pressure boosting channel, so that the fixing assembly 3432 expands to lock the fitting angle of the fitting member 342.

[0157] In some embodiments, please refer to Figure 6 and Figure 7 The fixing assembly 3432 comprises a plurality of conveying members 34321 and a plurality of expanding members 34322.

[0158] The conveying member 34321 has a first deformation space 34324, and one conveying member 34321 is arranged on the fixing tube 3431.

[0159] The expanding member 34322 has a second deformation space 34325, and is arranged on the conveying member 34321.

[0160] Each conveying member 34321 and each expanding member 34322 are arranged alternately, and the expanding member 34322 is located between two adjacent abutting members 342 along the radial direction of the fixing member 341.

[0161] It can be understood that the conveying member 34321 is a tubular structure capable of deforming. For example, the conveying member 34321 can be a silica gel tube, a plastic tube, etc., but is not limited thereto.

[0162] The expanding member 34322 is a spherical structure capable of deforming. For example, the expanding member 34322 can be a silica gel spherical structure, a plastic spherical structure, etc., but is not limited thereto. The thickness of the expanding member 34322 can be less than the thickness of the conveying member 34321, so that when the pressure in the first deformation space 34324 and the second deformation space 34325 increases, the degree of deformation of the expanding member 34322 is greater than that of the conveying member 34321, thereby locking the fitting angle of the abutting member 342 more quickly.

[0163] In this way, when the driving and pressurizing member 3433 pressurizes the first deformation space 34324 and the second deformation space 34325 through the pressurizing channel, the conveying member 34321 and the expanding member 34322 expand. Since the expanding member 34322 is located between two adjacent abutting members 342 along the radial direction of the fixing member 341, when the abutting member 342 tilts due to rotation caused by fitting the skin curve, a gap appears between the two adjacent abutting members 342, and the expanded expanding member 34322 can resist the gap, thereby locking the tilt angle of the abutting member 342.

[0164] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A negative pressure dressing device for wounds, characterized in that, include: The control drive unit has a first flow channel and an air intake end connected to the first flow channel; A pressure regulating unit, disposed on the control drive unit, has a second drainage channel, one end of which is connected to the first drainage channel; as well as The collection unit, detachably mounted on the control drive unit, has a third drainage channel and a storage and accommodating space. One end of the third drainage channel is connected to the storage and accommodating space, and the other end of the third drainage channel is used to fix it to the patient's wound. The storage and accommodating space is connected to the other end of the second drainage channel. The collection unit includes a sponge dressing and a suction cup film, and the suction cup film is used to fix the sponge dressing to the patient's wound. The control drive unit is used to create a negative pressure in the storage space through the air inlet, the first drainage channel and the second drainage channel so that the storage space can draw the wound fluid into the storage space through the third drainage channel. The pressure regulation unit is used to release pressure or increase negative pressure when the pressure in the storage space fluctuates. The pressure control unit includes: A mounting element is provided on the control drive unit; An extraction pipe, disposed on the mounting component, has the second drainage channel; A sensing device is disposed on the mounting component and has a sensing and receiving space that is connected to the second drainage channel; An energy storage drive device, mounted on the mounting component and connected to the sensing device, includes an energy storage space, a pressure relief channel, a first drive channel, and a second drive channel. The energy storage space is connected to the air outlet of the control drive unit. The two ends of the pressure relief channel are respectively connected to the energy storage space and the outside. The two ends of the first drive channel and the second drive channel are respectively connected to the energy storage space and the outside. A pressure regulating device is disposed on the mounting component and has a first auxiliary channel and a second auxiliary channel. The two ends of the first auxiliary channel are respectively connected to the air inlet and the storage and accommodating space, and the two ends of the second auxiliary channel are respectively connected to the second drainage channel and the pressure relief channel. The control drive unit is used to deliver air into the energy storage space through the air outlet to create positive pressure in the energy storage space. The sensing device is used to open the first drive channel to release the pressure in the energy storage space to the outside through the first drive channel and drive the pressure regulating device to open the first auxiliary channel so that the air inlet is connected to the energy storage space through the first auxiliary channel, or to open the second drive channel to release the pressure in the energy storage space to the outside through the second drive channel and drive the pressure regulating device to open the second auxiliary channel so that the second drainage channel is connected to the pressure relief channel through the second auxiliary channel.

2. The wound negative pressure dressing device as described in claim 1, characterized in that, The suction cup film includes: The inner layer, which is an absorbent resin layer with a three-dimensional network structure constructed primarily of sodium polyacrylate and with added crosslinking agents, is for contact with the patient's skin; and The outer layer, which is a silver-containing antibacterial foam layer formed by foaming polyethylene matrix and silver nanoparticles, is disposed on the side of the inner layer away from the patient's skin.

3. The wound negative pressure dressing device as described in claim 2, characterized in that, The suction cup film also includes: A liquid-absorbing color-changing layer is disposed on the inner layer, wherein the liquid-absorbing color-changing layer is a porous sponge structure layer formed of cross-linked sodium polyacrylate loaded with an acid-base indicator; and A structural reinforcement layer is disposed on the side of the absorbent color-changing layer near the patient's skin to direct the exudate to the absorbent color-changing layer.

4. The wound negative pressure dressing device as described in claim 1, characterized in that, The control drive unit includes: Installation components; A flow-driving device, disposed on the mounting component, has the first flow-driving channel and the air inlet end; and A control device is mounted on the mounting component and is communicatively connected to the drainage drive device. The control device is used to control the flow-driving device to form a negative pressure in the storage space through the air inlet, the first flow-driving channel and the second flow-driving channel. The pressure regulating part is disposed on the mounting part, and the collecting part is detachably disposed on the mounting part.

5. The wound negative pressure dressing device as described in claim 1, characterized in that, The sensing device includes: A sensing receiver is disposed on the setting member and has a sensing hole that connects to the second drainage channel; A deformable element, deformably disposed on the sensing receiver, together with the sensing receiver, forms the sensing receiving space, the sensing receiving space being connected to the second drainage channel through the sensing hole; and A blocking member is movably disposed on the sensing receiving member and connected to the deformable member. The blocking member has a first blocking hole and a second blocking hole. The deformable element is used to drive the blocking element to block the first drive channel and the second drive channel when the pressure in the storage space is normal, to contract to drive the blocking element to move when the negative pressure in the storage space decreases, so that the first blocking hole is close to the first drive channel and the energy storage space is connected to the outside through the first drive channel, and to expand to drive the blocking element to move in the opposite direction when the negative pressure in the storage space increases, so that the second blocking hole is close to the second drive channel and the energy storage space is connected to the outside through the second drive channel.

6. The wound negative pressure dressing device as described in claim 1, characterized in that, The energy storage drive device includes: An energy storage container is disposed on the mounting component and has the energy storage space; A first driving tube is disposed on the energy storage container and has the first driving channel; The second drive tube is disposed on the energy storage container and has the second drive channel; A third drive tube, disposed on the energy storage housing, has the pressure relief channel; and A one-way valve is located within the pressure relief channel and is mounted on the third drive pipe.

7. The wound negative pressure dressing device as described in claim 1, characterized in that, The pressure regulating device includes: A pressure regulating mechanism is disposed on the mounting component; A first connecting pipe, disposed on the mounting member, having the first auxiliary channel; and The second connecting pipe is disposed on the exhaust pipe and has the second auxiliary channel; The pressure regulating mechanism is located within the first auxiliary channel and the second auxiliary channel, and blocks the first auxiliary channel and the second auxiliary channel. The energy storage drive device is used to drive the pressure regulating mechanism to open the first auxiliary channel when the pressure in the energy storage space is released through the first drive channel, or to drive the pressure regulating mechanism to open the second auxiliary channel when the pressure in the energy storage space is released through the second drive channel.

8. The wound negative pressure dressing device as described in claim 7, characterized in that, The pressure regulating mechanism includes: An adjustment accommodating member is disposed on the setting member and has an adjustment accommodating space, the adjustment accommodating space being connected to the first driving channel and the second driving channel; A rotating member, located within the adjustment receiving space and rotatably mounted on the adjustment receiving member, has a first rack portion; and Two blocking components are disposed on the mounting member, each having a second rack portion, and are respectively partially located within the first auxiliary channel and the second auxiliary channel; When the pressure in the energy storage space is released through the first drive channel, the rotating component is driven to rotate, so that the first rack portion engages with the second rack portion of the sealing assembly located partially in the first auxiliary channel, thereby causing the sealing assembly to open the first auxiliary channel. When the pressure in the energy storage space is released through the second drive channel, the rotating component is driven to rotate in the opposite direction, so that the first rack portion engages with the second rack portion of the sealing assembly located partially in the second auxiliary channel, thereby causing the sealing assembly to open the second auxiliary channel. When the first drive channel and the second drive channel are separated, the two sealing assemblies respectively separate the first auxiliary channel and the second auxiliary channel.

9. The wound negative pressure dressing device as described in claim 8, characterized in that, The blocking assembly includes: A blocking and receiving component is disposed on the mounting component and has a blocking and receiving space that communicates with the first auxiliary channel or the second auxiliary channel; A blocking member, located within the blocking receiving space, has a second rack portion and is movably disposed on the blocking receiving member, and is partially located within the first auxiliary channel or the second auxiliary channel; and An elastic element is located within the sealing and receiving space. The two ends of the elastic element are respectively connected to the sealing element and the sealing and receiving element, and are used to provide elastic force to make the sealing element approach the first auxiliary channel or the second auxiliary channel. The pressure within the energy storage space drives the rotating component to rotate, thereby moving the sealing component that meshes with the first rack via the second rack portion and compressing the elastic component, thus opening the first auxiliary channel or the second auxiliary channel.

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