Portable negative pressure suction therapy device

Abstract

This invention provides a portable negative pressure suction therapy device that applies stable and precise low negative pressure suction to a dressing material layer. [Solution] The portable negative pressure suction therapy device comprises a device housing with a handle on top, a low-vacuum negative pressure suction therapy module, and a control module 3. The low-vacuum negative pressure suction therapy module comprises a negative pressure generator 21, a negative pressure mode selection device, a water seal bottle 23, a liquid storage bottle 24, and a dressing material layer 25. The negative pressure generator, negative pressure mode selection device, liquid storage bottle, and dressing material layer are connected sequentially, and the water seal bottle and liquid storage bottle are located on opposite sides of the device housing, respectively. The control module comprises a control board 31 and a pressure sensor 32. By arranging the water seal bottle and liquid storage bottle on opposite sides of the device housing, it becomes easy to observe the liquid state inside the water seal bottle and liquid storage bottle, and the magnitude of the suction force of the negative pressure mode selection device can be precisely adjusted using the water seal bottle.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a portable negative pressure suction therapy device.

Background Art

[0002] With the development of medical technology, currently, in the treatment of extensive burns, scalds and severely infected wounds, negative pressure therapy is usually used. In this method, by forming a predetermined degree of vacuum on the wound surface through the action of negative pressure, not only can the exudate from the wound surface be discharged, but also the blood circulation of the wound surface can be promoted by utilizing the vacuum suction effect.

[0003] Vacuum Sealing Drainage (VSD) therapy technology shows good treatment effects in wound treatment. Its principle is to close the wound surface with a covering material, connect it to a negative pressure source for suction, and form a negative pressure environment on the wound surface and its treatment system, so as to achieve treatment effects such as drainage of the wound surface, complete removal of exudate, improvement of local blood circulation, subsidence of swelling, and inhibition of reabsorption of toxins such as inflammatory mediators.

[0004] However, due to factors such as the limited volume of the wound surface within the suction sealing range by the negative pressure suction therapy device, it is difficult to control the micro negative pressure (adjustment and control range: -1000 pa ≤ treatment negative pressure value ≤ -100 pa) with the conventional negative pressure suction therapy device using negative pressure drainage, and there is a problem that the degree of vacuum becomes excessive during the use of VSD (the general treatment negative pressure value is below -5000 pa). Long-term high negative pressure treatment of the wound surface not only causes compressive pain on the patient's wound surface and reduces tolerance, but also causes damage and shedding of newly formed epithelial cells and skin island cells on the wound surface such as burns and scalds during the growth period, and aging of granulation tissue due to high negative pressure suction, which is disadvantageous for wound healing. In addition, the negative pressure suction therapy device has a problem that its volume is too large and it is difficult to carry.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The technical problems that this invention aims to solve are excessive vacuum suction force, poor adjustment accuracy of negative pressure suction force, and the inconvenience of transporting the equipment. [Means for solving the problem]

[0006] To solve the above technical problems, the present invention provides a portable negative pressure suction therapy device comprising a device housing with a handle on top, a low-vacuum negative pressure suction therapy module, and a control module, wherein the low-vacuum negative pressure suction therapy module is provided in the device housing and includes a negative pressure generator, a negative pressure mode selection device, a water seal bottle, a liquid storage bottle, and a dressing material layer, wherein the negative pressure generator, the negative pressure mode selection device, the liquid storage bottle, and the dressing material layer are sequentially connected, the water seal bottle and the liquid storage bottle are located on both sides of the device housing, the water seal bottle is connected to the negative pressure mode selection device for selecting negative pressure modes of different suction strengths, and the control module comprises a control board and a pressure sensor for detecting the pressure in the negative pressure mode selection device, and when the pressure detected by the pressure sensor reaches the set pressure on the control board, the control board stops the operation of the negative pressure generator, thereby providing a portable negative pressure suction therapy device.

[0007] Furthermore, the negative pressure mode selection device comprises a multi-way joint, a first solenoid valve, and a second solenoid valve. The pressure sensor and the first solenoid valve are connected to any two ports of the multi-way joint. The three ports of the multi-way joint are connected to a negative pressure generating pipe, a negative pressure pipe, and a precision negative pressure pipe, respectively. The negative pressure generating pipe is connected to the negative pressure generating device, the negative pressure pipe is connected to the liquid storage bottle, the precision negative pressure pipe is connected to the water seal bottle, and the second solenoid valve is connected to the water seal bottle. The first and second solenoid valves control communication with and disconnection from the atmosphere. When the negative pressure mode selection device selects the normal negative pressure mode, the second solenoid valve is closed. When the negative pressure mode selection device selects the precision negative pressure mode, the second solenoid valve is opened to communicate with the atmosphere.

[0008] Furthermore, the water-seal bottle includes a water-seal bottle body, an exhaust pipe, and an intake pipe, wherein sterile physiological saline is stored inside the water-seal bottle body, one end of the exhaust pipe is located above the liquid level, the other end of the exhaust pipe is connected to the precision negative pressure piping, one end of the intake pipe is located below the liquid level, and the other end of the intake pipe is connected to the second solenoid valve.

[0009] Furthermore, the negative pressure piping, the exhaust pipe, and the intake pipe all pass through the top of the device housing.

[0010] Furthermore, the negative pressure mode selection device further comprises a filter and a liquid ingress prevention member, wherein the filter is provided in the negative pressure piping and the liquid ingress prevention member is provided in the negative pressure generating piping.

[0011] Furthermore, the micro-vacuum negative pressure suction therapy module further comprises a drainage pump, one end of which is connected to the liquid ingress prevention member or the liquid storage bottle, and the other end of which is connected to the outside.

[0012] Furthermore, the water-seal bottle includes a water-seal bottle body, a dustproof hole plug, an exhaust pipe, and an intake pipe, wherein sterile physiological saline is stored inside the water-seal bottle body, one end of the exhaust pipe is located above the liquid level, the other end of the exhaust pipe is connected to the negative pressure mode selection device, the first port of the intake pipe is located below the liquid level, the second port of the intake pipe is in communication with the atmosphere, and the dustproof hole plug is provided at the second port of the intake pipe.

[0013] Furthermore, the diameter range of the second port of the intake pipe is 0.2 to 0.4 millimeters.

[0014] Furthermore, a sound-dampening device that communicates with the atmosphere is provided at the exhaust end of the negative pressure generator.

[0015] Furthermore, a strap is provided at the top of the handle.

[0016] Furthermore, the liquid storage bottle includes a liquid storage bottle body, a liquid storage bottle cap, and a floating plug, wherein the liquid storage bottle cap communicates with the connection ports of the negative pressure piping and the dressing material layer, the liquid storage bottle cap is provided on the liquid storage bottle body, the liquid storage bottle body is provided with a liquid chamber and a plug chamber, the plug chamber communicates with the liquid chamber and the negative pressure piping, the floating plug is provided on the plug chamber, and the floating plug is used to block the negative pressure piping. [Effects of the Invention]

[0017] The portable negative pressure suction therapy device according to the embodiment of the present invention has the following beneficial effects compared to the prior art. By providing a handle on the top of the device housing, it becomes easier for the user to carry the portable negative pressure suction therapy device with one hand. By arranging the water seal bottle and the liquid storage bottle on both sides of the device housing, it becomes easier to observe the liquid state inside the water seal bottle and the liquid storage bottle. The negative pressure mode selection device can select negative pressure modes with different suction forces, including a normal negative pressure mode and a precision negative pressure mode, according to the user's needs. The normal negative pressure range is -5kPa or less, and the precision negative pressure range is -5kPa to -1kPa, where the negative pressure is measured relative to the ambient pressure. For example, -5kPa indicates a pressure 5kPa lower than the ambient pressure, and -1kPa indicates a pressure 1kPa lower than the ambient pressure. By connecting the water seal bottle to the negative pressure mode selection device, the magnitude of the suction force of the negative pressure mode selection device can be precisely adjusted using the water seal bottle. In precision negative pressure mode, when the negative pressure suction device is set to micro-negative pressure suction, slight changes in the suction force within the dressing layer at the wound surface manifest as a change in the liquid level of the water seal bottle. If the negative pressure of the negative pressure suction device and the suction negative pressure at the wound surface are lower than -1 kPa, i.e., if the liquid level exceeds a 10 cm water column (a 10 cm water column corresponds to -1 kPa), air flows in from the second solenoid valve, which is in communication with the atmosphere, to equalize the negative pressure at the wound surface. This is precisely adjusted and controlled until it reaches -1 kPa, thereby preventing excessive negative pressure suction at the wound surface. The liquid level in the water-seal bottle precisely reflects the magnitude of the suction force within the dressing layer. By utilizing the liquid level in the water-seal bottle, the slight negative pressure value in a slight vacuum environment can be precisely adjusted, providing a stable and precise low negative pressure suction force to the dressing layer. This maintains an appropriate and stable low-suction vacuum environment on the wound surface, avoiding the dressing layer compressing the wound surface and causing pain, as well as incidental damage such as the suction and detachment of newly formed epithelial cells caused by excessive vacuum during use. [Brief explanation of the drawing]

[0018] [Figure 1]It is the first perspective view of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 2] It is a cross-sectional view of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 3] It is an exploded view of the micro-vacuum negative pressure suction therapy module of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 4] It is a perspective view of the liquid storage bottle and the dressing material layer of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 5] It is the second perspective view of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 6] It is a schematic configuration diagram of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 7] It is a schematic diagram of the water seal bottle of the portable negative pressure suction therapy device in the embodiment of the present application. [Figure 8] It is a schematic diagram of the liquid storage bottle of the portable negative pressure suction therapy device in the embodiment of the present application.

Embodiments for Carrying Out the Invention

[0019] Hereinafter, the specific embodiments of the present application will be described in more detail while referring to the drawings and embodiments. The following embodiments are for explaining the present application, but do not limit the scope of the present application. Unless otherwise specified, the relative arrangements and numerical values of the members and steps described in these embodiments do not limit the scope of the present application.

[0020] The following description regarding at least one exemplary embodiment is merely exemplary in nature and is not intended to impose any limitation on the present application or its application or use.

[0021] Regarding the technologies, methods and devices known to those skilled in the art, detailed descriptions may be omitted, but when appropriate, the said technologies, methods and devices should be regarded as part of the specification.

[0022] In all examples presented and discussed herein, any specific values ​​should be interpreted as illustrative only and not intended to be limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0023] Note that similar symbols and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be considered further in subsequent drawings.

[0024] As shown in Figures 1 to 8, an embodiment of the present invention is a portable negative pressure suction therapy device comprising a device housing 1 with a handle 11 on top, a low-vacuum negative pressure suction therapy module 2, and a control module 3, wherein the low-vacuum negative pressure suction therapy module 2 includes a negative pressure generator 21, a negative pressure mode selection device 22, a water seal bottle 23, a liquid storage bottle 24, and a dressing material layer 25, and the low-vacuum negative pressure suction therapy module 2 is provided in the device housing 1, and the negative pressure generator 21, negative pressure mode selection device 22, liquid storage bottle 24, and dressing material layer 2 The 5 components are connected sequentially, with the water seal bottle 23 and the liquid storage bottle 24 located on opposite sides of the device housing 1, respectively. The water seal bottle 23 is connected to a negative pressure mode selection device 22 for selecting negative pressure modes of different suction strengths. The control module 3 includes a control board 31 and a pressure sensor 32 for detecting the pressure in the negative pressure mode selection device 22. When the pressure detected by the pressure sensor 32 reaches the set pressure on the control board 31, the control board 31 stops the operation of the negative pressure generator 21. Disclosed is a portable negative pressure suction therapy device.

[0025] In the portable negative pressure suction therapy device of this invention, a handle 11 is provided on the top of the device housing 1, making it easy for the user to carry the portable negative pressure suction therapy device with one hand. Furthermore, if the portable negative pressure suction therapy device is too heavy to carry with one hand, it can be carried using the strap 12 provided on the top of the handle 11. Compared to a system using casters, these carrying methods have the advantage of being more flexible, making it easier to carry on uneven ground and meeting the needs of use in scenarios such as carrying up stairs, providing first aid outdoors, and rescue in rubble.

[0026] The negative pressure suction force generated by the negative pressure generator 21 is transmitted to the negative pressure mode selection device 22. Since the piping of the negative pressure mode selection device 22 is connected to the top of the liquid storage bottle 24, the negative pressure suction force is transmitted to the top of the liquid storage bottle 24. Furthermore, since piping connecting to the dressing material layer 25 is provided at the top of the liquid storage bottle 24, the wound surface to which the dressing material layer 25 is applied can be maintained in a vacuum environment. At the same time, the suction action of the negative pressure generator 21 can draw exudate from the wound surface into the liquid storage bottle 24, enabling the rapid treatment of the exudate from the wound surface.

[0027] The negative pressure mode selection device 22 allows users to select negative pressure modes with different suction forces according to their needs. These negative pressure modes include a normal negative pressure (pressure ≤ -5kPa) mode and a precision negative pressure (-5kPa ≤ pressure ≤ -1kPa) mode, where negative pressure is measured relative to ambient pressure. For example, -5kPa indicates a pressure 5kPa lower than ambient pressure, and -1kPa indicates a pressure 1kPa lower than ambient pressure. By connecting the water seal bottle 23 to the negative pressure mode selection device 22 and opening the second solenoid valve 224 to communicate with the atmosphere, even slight changes in the suction force inside the dressing material layer 25 have a clear effect on the liquid level in the water seal bottle 23. Therefore, the liquid level in the water seal bottle 23 accurately reflects the magnitude of the suction force inside the dressing material layer. Users can clearly understand the magnitude of the suction force inside the dressing material layer 25 by visually observing or detecting the liquid level inside the water seal bottle 23 located outside the device housing 1. If the liquid level in the water seal bottle 23 exceeds the set range, the first solenoid valve 222 is opened to introduce outside air into the negative pressure piping 202, appropriately reducing the suction force inside the dressing material layer 25 and easing the pressure inside the wound. On the other hand, if the negative pressure in the negative pressure piping 202 becomes excessive, the second solenoid valve 224 is opened to communicate with the atmosphere, allowing outside air to flow into the negative pressure piping 202 through the intake pipe of the water seal bottle 23 due to the influence of atmospheric pressure. This is equivalent to automatically introducing an appropriate amount of gas into the negative pressure piping 202, maintaining the negative pressure value of the negative pressure piping 202 at an appropriate level and preventing the suction force inside the dressing material layer 25 from becoming excessive.

[0028] Therefore, the magnitude of the suction force of the negative pressure mode selection device 22 can be precisely adjusted using the water seal bottle 23. In the precision negative pressure mode, by precisely adjusting the slight negative pressure value in a slight vacuum environment using the water seal bottle 23, the problem of reduced accuracy in adjusting the negative pressure when controlling the operation of the negative pressure generator 21 using the pressure sensor 32 can be overcome. This allows for a stable and precise low negative pressure suction force to be applied to the dressing material layer 25, maintaining an appropriate and stable low suction vacuum environment on the wound surface and avoiding the dressing material layer 25 compressing the wound surface and causing pain due to excessive vacuum during use.

[0029] To facilitate observation of the liquid level inside the water seal bottle 23 and the liquid storage bottle 24, the water seal bottle 23 and the liquid storage bottle 24 are positioned on opposite sides of the device housing 1. By observing the scale on the water seal bottle body 231 corresponding to the liquid level inside the water seal bottle 23, the magnitude of the micro-vacuum suction force can be determined, making it easier to precisely control the magnitude of the suction force inside the dressing material layer 25. Furthermore, by observing the liquid level inside the liquid storage bottle 24, it is possible to determine whether or not it is necessary to remove the liquid storage bottle 24 and treat the waste liquid inside it. In addition, by positioning the water seal bottle 23 and the liquid storage bottle 24 on opposite sides of the device housing 1, it becomes easy to remove and replace the water seal bottle 23 if it becomes clogged, and it also becomes easy to remove and replace the liquid storage bottle 24 if it becomes clogged or full of waste liquid.

[0030] The control board 31 controls the magnitude of the micro-vacuum suction force of the negative pressure mode selection device 22 via the pressure sensor 32. The pressure sensor 32 detects the pressure value of the negative pressure mode selection device 22 under different modes, and when the pressure of the selected mode detected by the pressure sensor 32 reaches the set pressure of the control board 31, the control board 31 stops the operation of the negative pressure generator 21, thereby preventing the suction force of the dressing material layer 25 from becoming excessive.

[0031] The fluid collection bottle 24 collects and stores exudate from the wound. The dressing layer 25 adheres closely to the wound surface and absorbs waste fluid from the wound, while also functioning as a substitute for damaged skin, providing comprehensive protection to the wound from the start of treatment until wound healing and skin damage repair are complete, and further creating a microenvironment that promotes wound healing. The dressing layer 25 is also provided with a medical adhesive film that adheres closely to the skin and seals the wound.

[0032] By using vacuum sealing drainage therapy technology and the micro-vacuum negative pressure suction therapy module 2, the liquid level in the water seal bottle 23 of the micro-vacuum negative pressure suction therapy module 2 can be controlled by adjusting and controlling the amount of liquid in the water seal bottle 23 during the wound healing process. This allows for constant adjustment and control of the negative pressure load (vacuum level) on the wound surface throughout 24 hours, maintaining the wound surface in a clinically necessary micro-vacuum state. As a result, it promotes the absorption of local exudate, dilates blood vessels to accelerate blood flow, significantly improves blood circulation, eliminates embolisms at the lesion site without damaging the wound surface, enhances the blood oxygen supply and metabolism necessary for wound repair, and produces remarkable therapeutic effects.

[0033] In this embodiment of the present invention, the control board 31 may be a printed circuit board, or it may be a single-chip microcomputer with a simple program.

[0034] In the embodiment of the present invention, the negative pressure generating device 21 is a vacuum pump, and this vacuum pump can generate negative pressure using a mechanical pump, turbo pump, or compressor, etc.

[0035] As shown in Figures 2 and 3, in one selectable embodiment of the present invention, the negative pressure mode selection device 22 comprises a multi-way joint 221, a first solenoid valve 222, and a second solenoid valve. The pressure sensor 32 and the first solenoid valve 222 are connected to any two ports of the multi-way joint 221, and the three ports of the multi-way joint 221 are connected to negative pressure generating piping 201, negative pressure piping 202, and precision negative pressure piping 203, respectively. In one embodiment, the multi-way joint 221 is a five-way joint. The negative pressure generating piping 201 is connected to the negative pressure generator 21, the negative pressure piping 202 is connected to the liquid storage bottle 24, and the precision negative pressure piping 203 is connected to the water seal bottle 23. The second solenoid valve 224 is connected to the water seal bottle 23. The first solenoid valve 222 and the second solenoid valve 224 control communication with and disconnection from the atmosphere. When the negative pressure mode selection device 22 selects the normal negative pressure mode, the second solenoid valve 224 is closed, and when the negative pressure mode selection device 22 selects the precision negative pressure mode, the second solenoid valve 224 is opened and communicates with the atmosphere.

[0036] By providing a second solenoid valve 224 in the intake pipe 233 of the water-seal bottle 23, the control board 31 can select between a precision negative pressure mode or a normal negative pressure mode by controlling the opening and closing of the second solenoid valve 224.

[0037] In normal negative pressure mode, the control board 31 controls the closing of the second solenoid valve 224. The negative pressure generator 21, the liquid ingress prevention member 225, the negative pressure piping 202, and the liquid storage bottle 24 are connected in sequence, and the vacuum suction force generated by the negative pressure generator 21 acts directly on the liquid storage bottle 24, generating a normal negative pressure suction force within the dressing material layer 25.

[0038] In precision negative pressure mode (generating a slight vacuum inside the water seal bottle 23), the control board 31 controls the second solenoid valve to open, connecting the intake pipe 233 of the water seal bottle 23 to the atmosphere. By introducing an appropriate amount of gas into the negative pressure system via the intake pipe 233 of the water seal bottle 23 to maintain atmospheric pressure equilibrium inside the water seal bottle 23, the liquid level in the intake pipe 233 is lowered, and the slight negative pressure inside the negative pressure system is precisely adjusted. The operation of the negative pressure generator 21 is stopped when the set slight negative pressure is generated. The negative pressure generator 21 evacuates the water seal bottle 23 via the precision negative pressure piping 203, transmits the set slight negative pressure to the water seal bottle 23, and generates a slight vacuum inside the water seal bottle 23. When the negative pressure system reaches the set slight negative pressure, the negative pressure generator 21 stops operating. By adjusting the liquid level of the water seal bottle 23, the magnitude of the slight negative pressure can be precisely controlled. Furthermore, the pressure generated by the liquid level inside the water seal bottle 23 is used to precisely maintain the negative pressure piping 202 at a low pressure value. The slight vacuum inside the water seal bottle 23 generates a stable slight negative pressure suction force, providing a stable low-pressure vacuum suction force to the dressing material layer 25, thus avoiding excessive pressure on the wound surface and causing pain during use. The water seal bottle 23 can store a water column of up to 500 mm inside, allowing for precise adjustment of negative pressure to minus 5 kilopascals or more. Due to the height of the bottle body, it is easy to adjust the slight vacuum suction force of the water seal bottle 23.

[0039] Specifically, if the normal negative pressure mode, which is lower than -5 kilopascals, is selected via the touch panel of the control module 3, the second solenoid valve 224 closes, the water seal bottle 23 is isolated from the atmosphere, and the negative pressure generator 21 continues to operate. If the precision negative pressure mode, which is higher than -5 kilopascals, is selected via the touch panel, the control board 31 controls the second solenoid valve 224 to open, connecting the water seal bottle 23 to the atmosphere, and the negative pressure generator 21 starts operating to generate a slight vacuum inside the water seal bottle 23. When the pressure sensor 32 detects that the negative pressure has reached the set slight negative pressure value, the negative pressure generator 21 stops operating and precisely adjusts the magnitude of the negative pressure using the water seal bottle 23.

[0040] When the portable negative pressure suction therapy device stops operating, the first solenoid valve 222 communicates with the atmosphere, thereby restoring the air pressure in the piping to normal atmospheric pressure. This makes it easier for the negative pressure mode selection device 22 to return to its natural state, which is advantageous for piping maintenance and ensures the long-term normal use of the low-vacuum negative pressure suction therapy system.

[0041] Specifically, the dustproof vent plug 235 can replace the function of the second solenoid valve 224. The dustproof vent plug 235 is installed in the water seal bottle 23 and controls the communication and blocking of the water seal bottle 23 to the atmosphere.

[0042] As shown in Figures 1, 2, and 7, in one selectable embodiment of the present invention, the water-seal bottle 23 includes a water-seal bottle body 231, an exhaust pipe 232, and an intake pipe 233. Sterile saline solution is stored in the water-seal bottle body 231. One end of the exhaust pipe 232 is located above the liquid level, and the other end of the exhaust pipe 232 is in communication with a precision negative pressure piping 203. One end of the intake pipe 233 is located below the liquid level, and the other end of the intake pipe 233 is connected to a second solenoid valve 224. By storing a predetermined height of sterile saline solution inside the water-seal bottle body 231, a clean and hygienic negative pressure source can be provided to the negative pressure piping 202, thereby reducing the risk of contamination of the patient's wound. The liquid level in the intake pipe 233 is used to precisely adjust and control the magnitude of the negative pressure (vacuum) of the wound closure treatment system (i.e., the negative pressure suction device and dressing layer).

[0043] As shown in Figures 1 and 3, in one selectable embodiment of the present invention, the negative pressure piping 202, exhaust pipe 232, and intake pipe 233 all pass through the top of the device housing 1. The fact that the negative pressure piping 202, exhaust pipe 232, and intake pipe 233 all pass through the top of the device housing 1 saves installation space. If these pipes were installed to pass through the sides of the device housing 1 and connect to the corresponding device, the pipes would extend laterally, making them more likely to collide with or get caught on other objects, and also increasing the space required for the installation of the portable negative pressure suction therapy device. If these pipes were installed to pass through the bottom of the device housing 1 and connect to the corresponding device, the bottom of the portable negative pressure suction therapy device would not be flat, making it difficult to install it upright, while installing it horizontally would require more installation space.

[0044] As shown in Figures 2 and 3, in one selectable embodiment of the present invention, the negative pressure mode selection device 22 further comprises a filter 223 and a liquid ingress prevention member 225. The filter 223 is provided in the negative pressure piping 202, and the liquid ingress prevention member 225 is provided in the negative pressure generating piping 201. If liquid flows into the liquid ingress prevention member 225 through the piping, the negative pressure generator 21 stops operating to prevent the liquid in the piping from entering the negative pressure generator 21 due to suction and affecting the normal operation of the negative pressure generator 21. By providing the filter 223 in the negative pressure piping 202, it is possible to prevent exudate from wounds collected in the liquid storage bottle 24 from flowing into the negative pressure piping 202, thereby avoiding a situation in which negative pressure cannot be transmitted due to blockage of the piping.

[0045] As shown in Figures 1 and 2, in one selectable embodiment of the present invention, the micro-vacuum negative pressure suction therapy module further comprises a drainage pump. One end of the drainage pump is connected to a liquid ingress prevention member 225 or a liquid storage bottle 24, and the other end is connected to the outside. If liquid flows into the liquid ingress prevention member 225 through the piping, the negative pressure generator 21 stops operating, and when the drainage button on the touch panel of the control module 3 is clicked, the drainage pump is activated to discharge the liquid in the piping to the outside, after which the negative pressure generator 21 resumes operation. In this way, it is possible to prevent liquid in the piping from entering the negative pressure generator 21 due to the action of suction and affecting the normal operation of the negative pressure generator 21.

[0046] As shown in Figure 1, in one selectable embodiment of the present invention, both the water seal bottle 23 and the liquid storage bottle 24 are manufactured from a transparent material, and both the water seal bottle body 231 of the water seal bottle 23 and the liquid storage bottle body 241 of the liquid storage bottle 24 are provided with graduation lines. By manufacturing the water seal bottle 23 and the liquid storage bottle 24 from a transparent material, it becomes easy to observe the liquid state inside the water seal bottle 23 and the liquid storage bottle 24. By providing graduation lines on the water seal bottle body 231 of the water seal bottle 23 and the liquid storage bottle body 241 of the liquid storage bottle 24, the liquid state can be observed more concretely and in detail. By observing the graduation values ​​on the water seal bottle body 231 corresponding to the liquid level in the water seal bottle 23, the magnitude of the micro-vacuum suction force can be grasped, making it easy to precisely control the suction force in the dressing material layer 25. In addition, by observing the graduations corresponding to the liquid level in the liquid storage bottle 24, it becomes easy to grasp the capacity until it is full, and the timing for replacing the liquid storage bottle 24 can be determined.

[0047] In one selectable embodiment of the present invention, fixing members are provided on both sides of the device housing 1, and the water seal bottle 23 and the liquid storage bottle 24 are installed on the fixing members. The fixing member comprises a position regulating ring and a base, the position regulating ring abuts against the side of the water seal bottle 23 and the side of the liquid storage bottle 24, and the base abuts against the bottom of the water seal bottle 23 and the bottom of the liquid storage bottle 24. The fixing members provided on both sides of the device housing 1 fix the water seal bottle 23 and the liquid storage bottle 24 to both sides of the device housing 1. This fixing method using both the position regulating ring and the base allows for some degree of position restriction and fixation of the water seal bottle 23 and the liquid storage bottle 24, while also facilitating their removal.

[0048] As shown in Figures 2 and 3, in one selectable embodiment of the present invention, a silencer 26 is provided at the exhaust end of the negative pressure generator 21, and the silencer 26 is in communication with the atmosphere. By providing the silencer 26 at the exhaust end of the negative pressure generator 21, noise associated with the generation of high-speed gas by the negative pressure generator 21 can be reduced, which is advantageous for the recuperation and treatment of patients.

[0049] As shown in Figure 1, in one selectable embodiment of the present invention, a strap 12 is provided at the top of the handle 11. By providing a strap 12 at the top of the handle 11, if the portable negative pressure suction therapy device is too heavy or inconvenient to carry with one hand, it can be carried using the strap 12 provided at the top of the handle 11.

[0050] As shown in Figure 1, in one selectable embodiment of the present invention, the control module 3 further comprises a touch display 33, which is mounted on the side of the device housing 1. Mounting the touch display 33 on the side of the device housing 1 makes it easier for the user to operate, and facilitates the selection of negative pressure modes and adjustment of the magnitude of the micro-vacuum suction force.

[0051] As shown in Figures 1 and 4, the dressing layer 25 is provided with two drainage tubes, both of which are connected to the inlet tube of the liquid storage bottle 24. By providing two drainage tubes in the dressing layer 25, the number of drainage pathways is increased, and the situation in which damaged tissue blocks the dressing layer 25 can be reduced.

[0052] As shown in Figures 5 and 8, in one selectable embodiment of the present invention, the liquid storage bottle cap 242 communicates with the connection ports of the negative pressure piping 202 and the dressing material layer 25. The liquid storage bottle cap 242 is provided on the liquid storage bottle body 241. The liquid storage bottle body 241 is provided with a liquid chamber 206 and a plug chamber 207. The plug chamber 207 communicates with the liquid chamber 206 and the negative pressure piping 202. A floating plug 243 is provided in the plug chamber 207 and is used to seal the negative pressure piping 202.

[0053] By providing a floating plug 243 in the plug chamber 207, when the liquid chamber 206 approaches fullness with exudate or effusion, that is, when the liquid level of exudate or effusion in the liquid chamber 206 reaches the height of the plug chamber 207, the floating plug 243 moves to the port of the negative pressure piping 202 as the liquid level in the plug chamber 207, which communicates with the liquid chamber 206, rises, blocking the negative pressure piping 202 before the liquid chamber 206 becomes full, preventing further aspiration of exudate or effusion from the dressing layer 25, and preventing exudate or effusion from being aspirated from the liquid chamber 206 into the negative pressure piping 202, thereby ensuring the safety of the treatment process.

[0054] Specifically, the liquid storage bottle 24 includes a liquid storage bottle body 241, a liquid storage bottle cap 242, a floating plug 243, and a rubber air valve 244. The rubber air valve 244 is provided between the negative pressure piping 202 and the floating plug 243, and the plug chamber 207, the rubber air valve 244, and the negative pressure piping 202 are sequentially connected. By providing the rubber air valve 244 between the negative pressure piping 202 and the floating plug 243, when the liquid chamber 206 approaches full, the rubber air valve 244 tightly seals the gap between the negative pressure piping 202 and the floating plug 243, thereby enhancing the sealing effect of the floating plug 243 on the negative pressure piping 202.

[0055] As shown in Figures 6 and 7, in one selectable embodiment of the present invention, the water-seal bottle 23 includes a water-seal bottle body 231, a dustproof hole plug 235, an exhaust pipe 232, and an intake pipe 233, wherein sterile saline solution is stored in the water-seal bottle body 231. One end of the exhaust pipe 232 is located above the liquid level, and the other end of the exhaust pipe 232 is connected to a negative pressure mode selection device 22. The first port 204 of the intake pipe is located below the liquid level, and the second port 205 of the intake pipe is in communication with the atmosphere. The dustproof hole plug 235 is provided at the second port 205 of the intake pipe. The diameter D of the second port 205 of the intake pipe is in the range of 0.2 to 0.4 millimeters.

[0056] By setting the diameter range of the second port 205 of the inspiratory tube 233 to 0.2 to 0.4 millimeters, the inspiratory flow rate can be precisely limited, minimizing negative pressure changes within the water seal bottle 23, avoiding large fluctuations in negative pressure within the negative pressure piping 202, and helping to reduce equipment noise generated during the treatment process.

[0057] Equipment Noise Table [Table 1]

[0058] As shown in Table 1, setting the diameter range of the second port 205 of the inspiratory tube 233 to 0.2 to 0.4 millimeters significantly reduces the noise of the device and improves patient comfort. If the diameter of the second port 205 of the inspiratory tube is less than 0.2 millimeters, the second port 205 of the inspiratory tube is too small, making it difficult for air to flow into the water seal bottle 23, which affects the effectiveness of the micro-negative pressure adjustment by the water seal bottle 23.

[0059] By providing a dustproof hole plug 235 at the second port 205 of the intake pipe, impurities such as dust and microorganisms can be effectively prevented from entering the water-seal bottle 23, ensuring the purity of the liquid stored in the water-seal bottle 23 and the safety of the treatment process. In precision negative pressure mode, the dustproof hole plug 235 can be removed to connect the intake pipe 233 to the atmosphere, thereby allowing for precise adjustment of the micro-negative pressure using the water-seal bottle 23.

[0060] Specifically, a maximum water level line is provided on the side wall of the water-seal bottle 23. The water-seal bottle 23 includes a water-seal bottle body 231, a bottle cap 234, a dustproof hole plug 235, an exhaust pipe 232, and an intake pipe 233. The bottle cap 234 is provided on the water-seal bottle body 231, and the dustproof hole plug 235, exhaust pipe 232, and intake pipe 233 are all provided on the bottle cap 234.

[0061] The above description is merely a preferred embodiment of the present application, and those skilled in the art can make various further improvements and modifications as long as they do not deviate from the technical principles of the present application, and these improvements and modifications should also be considered within the scope of protection of the present application. [Explanation of Symbols]

[0062] 1 device housing, 11 handle, 12 strap, 2. Micro-vacuum negative pressure suction therapy module, 21. Negative pressure generator, 22. Negative pressure mode selection device, 221. Multi-way joint, 222. First solenoid valve, 223. Filter, 224. Second solenoid valve, 225. Liquid ingress prevention member, 23. Water seal bottle, 231. Water seal bottle body, 232. Exhaust pipe, 233. Intake pipe, 234. Bottle cap, 235. Dustproof hole plug, 24. Liquid storage bottle, 241. Liquid storage bottle body, 242. Liquid storage bottle cap, 243. Floating plug, 244. Rubber air valve, 25. Dressing material layer, 26. Silencer, 201. Negative pressure generation piping, 202. Negative pressure piping, 203. Precision negative pressure piping, 204. First port of intake pipe, 205. Second port of intake pipe, 206. Liquid chamber, 207. Plug chamber, 3 control module, 31 control board, 32 pressure sensor, 33 touch display.

Claims

1. A portable negative pressure suction therapy device, A device housing with a handle on top, Micro-vacuum negative pressure suction therapy module, A control module is included, The micro-vacuum negative pressure suction therapy module is provided in the device housing and includes a negative pressure generator, a negative pressure mode selection device, a water seal bottle, a liquid storage bottle, and a dressing material layer, wherein the negative pressure generator, the negative pressure mode selection device, the liquid storage bottle, and the dressing material layer are connected sequentially, the water seal bottle and the liquid storage bottle are located on opposite sides of the device housing, and the water seal bottle is connected to the negative pressure mode selection device for selecting negative pressure modes with different suction strengths. The portable negative pressure suction therapy device is characterized in that the control module includes a control board and a pressure sensor for detecting the pressure in the negative pressure mode selection device, and when the pressure detected by the pressure sensor reaches the set pressure on the control board, the control board stops the operation of the negative pressure generator.

2. The negative pressure mode selection device comprises a multi-way joint, a first solenoid valve, and a second solenoid valve, wherein the pressure sensor and the first solenoid valve are connected to any two ports of the multi-way joint, the three ports of the multi-way joint are connected to a negative pressure generating pipe, a negative pressure pipe, and a precision negative pressure pipe, respectively, the negative pressure generating pipe is connected to the negative pressure generating device, the negative pressure pipe is connected to the liquid storage bottle, the precision negative pressure pipe is connected to the water seal bottle, the second solenoid valve is connected to the water seal bottle, the first solenoid valve and the second solenoid valve control communication and blocking with the atmosphere, the second solenoid valve is closed when the negative pressure mode selection device selects the normal negative pressure mode, and the second solenoid valve is opened to communicate with the atmosphere when the negative pressure mode selection device selects the precision negative pressure mode, characterized in that the portable negative pressure suction therapy device according to claim 1.

3. The portable negative pressure suction therapy device according to claim 2, wherein the water-seal bottle comprises a water-seal bottle body, an exhaust pipe, and an intake pipe, sterile physiological saline solution is stored inside the water-seal bottle body, one end of the exhaust pipe is located above the liquid level, the other end of the exhaust pipe is connected to the precision negative pressure piping, one end of the intake pipe is located below the liquid level, and the other end of the intake pipe is connected to the second solenoid valve.

4. The portable negative pressure suction therapy device according to claim 3, characterized in that the negative pressure piping, the exhaust pipe, and the intake pipe all penetrate the top of the device housing.

5. The portable negative pressure suction therapy device according to claim 2, wherein the negative pressure mode selection device further comprises a filter and a liquid ingress prevention member, the filter is provided in the negative pressure piping, and the liquid ingress prevention member is provided in the negative pressure generating piping.

6. The portable negative pressure suction therapy device according to claim 5, wherein the micro-vacuum negative pressure suction therapy module further comprises a drainage pump, one end of the drainage pump being connected to the liquid ingress prevention member or the liquid storage bottle, and the other end of the drainage pump being connected to the outside.

7. The portable negative pressure suction therapy device according to claim 1, wherein the water-seal bottle comprises a water-seal bottle body, a dustproof hole plug, an exhaust pipe, and an intake pipe, sterile physiological saline solution is stored inside the water-seal bottle body, one end of the exhaust pipe is located above the liquid surface, the other end of the exhaust pipe is connected to the negative pressure mode selection device, the first port of the intake pipe is located below the liquid surface, the second port of the intake pipe is in communication with the atmosphere, and the dustproof hole plug is provided at the second port of the intake pipe.

8. The portable negative pressure suction therapy device according to claim 7, characterized in that the diameter range of the second port of the inspiratory tube is 0.2 to 0.4 millimeters.

9. The exhaust end of the negative pressure generator is equipped with a sound-dampening device that communicates with the atmosphere. The portable negative pressure suction therapy device according to claim 1, characterized in that a strap is provided on the top of the handle and / or.

10. The portable negative pressure suction therapy device according to claim 2, wherein the liquid storage bottle includes a liquid storage bottle body, a liquid storage bottle cap, and a floating plug, the liquid storage bottle cap is in communication with the connection ports of the negative pressure piping and the dressing material layer, the liquid storage bottle cap is provided on the liquid storage bottle body, the liquid storage bottle body is provided with a liquid chamber and a plug chamber, the plug chamber is in communication with the liquid chamber and the negative pressure piping, the floating plug is provided on the plug chamber, and the floating plug blocks the negative pressure piping.

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