Voltage stabilizing device and current diversion device

Abstract

A pressure stabilizing device and a drainage device are disclosed. The pressure stabilizing device mainly includes a deformable chamber and a pressure stabilizing structure. A cavity pressure is formed within the deformable chamber, which is connected to an external constant pressure device. The pressure stabilizing structure applies a force to the deformable chamber, causing it to deform under the combined action of the cavity pressure and the force of the pressure stabilizing structure. This stabilizes the cavity pressure within the deformable chamber, allowing the connected external constant pressure device to maintain a constant pressure. Therefore, the pressure stabilizing device of this application provides a stable constant pressure environment for the external constant pressure device. Furthermore, the drainage device of this application can provide a constant negative pressure environment, facilitating the constant pressure drainage operation.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a voltage stabilizing device and a drainage device. Background Technology

[0002] In the field of medical device technology, air sacs (air chambers) and water sacs (water chambers) are frequently used. These sacs typically require stable or dynamic pressure and volume control, as in the following scenarios:

[0003] Firstly, artificial airways are a crucial life support measure for critically ill patients. The artificial airway cuff, attached to the end of the endotracheal tube or tracheostomy cannula, is used to seal the airway and relatively fix the endotracheal tube, assisting respiration or mechanical ventilation. Insufficient cuff inflation can cause air leakage, affecting the effectiveness of mechanical ventilation. Furthermore, secretions flowing down from the subglottic cuff can easily lead to aspiration and even ventilator-associated pneumonia (VAP). Overinflation of the cuff can cause airway mucosal damage and necrosis. According to the 2006 mechanical ventilation guidelines, cuff pressure should be monitored every 4-6 hours to maintain an artificial airway cuff pressure of 25-30 cmH2O (1 cmH2O = 0.098 kPa).

[0004] Secondly, the management of cuff pressure in clinical practice is currently not ideal, especially for ICU patients with long-term intubation. Changes in body position, such as turning over or going out for examinations, can affect the cuff's shape and cause pressure fluctuations, potentially leading to tracheal mucosal degeneration and necrosis. Timely monitoring of cuff pressure is necessary to avoid this. Currently, cuff pressure is mainly monitored intermittently using a handheld pressure monitor. There is a lack of devices that can continuously monitor cuff pressure and provide timely pressure compensation, maintaining the cuff within a relatively stable range over a long period and promptly detecting and replenishing pressure as needed. Literature reports that continuous monitoring of cuff pressure in mechanical ventilation with artificial airways, compared to intermittent monitoring, can improve the effectiveness of mechanical ventilation, shorten treatment time, reduce the incidence of ventilator-associated pneumonia (VAP), and reduce the intensity of antibiotic use, demonstrating significant clinical value. Therefore, there is an urgent clinical need for a pressure-stabilizing device that can continuously monitor cuff pressure.

[0005] Thirdly, the main types of thoracic and abdominal drainage devices currently available include single-lumen drainage tube negative pressure bulbs, single-lumen tube wall negative pressure suction, and single-lumen tube foot-operated negative pressure suction.

[0006] The single-lumen drainage tube negative pressure bulb works by creating negative pressure through the elastic recoil force of the bulb wall after it is flattened. Its disadvantages are: firstly, the pressure is uncontrollable; too low a pressure affects drainage effectiveness, while too high a pressure can lead to aspiration of the omentum and intestinal wall, causing blockage, intestinal obstruction, or even necrosis; secondly, its capacity is limited, requiring frequent replacement and emptying when drainage volume is high; and thirdly, it lacks an effective one-way valve control head, which may cause backflow when drainage volume is high or when the tube is squeezed. Chinese Patent No. CN205163738U (Application No. 201520812916) discloses a combined negative pressure bulb drainage device, consisting of an upper and lower spherical drainage bulb connected by a one-way drainage valve. This device has a large drainage volume, avoids frequent replacement of the drainage bulb, and also prevents backflow, but the pressure remains uncontrollable.

[0007] Single-lumen wall-mounted negative pressure suction works by generating negative pressure through a negative pressure channel in the wall. However, it has significant drawbacks: First, the drainage tube is thick and rigid, causing considerable damage to the abdominal wall and organs, easily compressing the intestines and leading to obstruction or even necrosis. Second, pressure fluctuations are a concern; due to the lack of a pressure-limiting device, the pressure rises sharply when the local lumen disappears, leading to a series of adverse consequences, including intestinal obstruction, tissue necrosis, and even massive hemorrhage, endangering life. Third, it is extremely inconvenient to use and carry, making it difficult to apply in the field or under rudimentary conditions.

[0008] The single-chamber foot-operated negative pressure suction works by creating negative pressure in a fixed-volume space through foot-operated exhaust. Its disadvantages are: first, it requires a dedicated person to operate the foot pedal, posing a high demand for manpower; second, while the pressure can be adjusted according to the force applied, the force is often too high and difficult to control accurately; and third, it is inconvenient to use and difficult to apply in field or battlefield conditions.

[0009] The three thoracic and abdominal drainage devices described above cannot simultaneously meet the requirements of being simple and convenient to use, having constant and controllable pressure, and having a large drainage volume. Therefore, there is an urgent need for a thoracic and abdominal drainage device that is simple and convenient to use, has constant and controllable pressure, and provides good drainage effect.

[0010] Fourth, there are many clinical applications of pressure bandaging, such as: pressure bandaging after limb fractures, pressure bandaging during surgery of adjustable pneumatic joints (to block blood flow and stop bleeding), pressure bandaging for deep vein thrombosis (to prevent lower extremity deep vein thrombosis), pressure bandaging of wounds after breast cancer surgery, pressure bandaging combined with negative pressure suction after skin grafting, pressure bandaging after cranioplasty, pressure bandaging after arterial puncture, and pressure bandaging after removal of deep vein catheters. Summary of the Invention

[0011] In view of the above problems, this application provides a voltage stabilizing device and a current diversion device to overcome or at least partially solve the above problems.

[0012] This application provides a pressure-stabilizing liquid device, comprising: a deformable chamber having a cavity pressure within a preset pressure range, and the deformable chamber being connected to an external constant pressure device; and a pressure-stabilizing structure for applying a force to the deformable chamber; wherein the deformable chamber can deform under the simultaneous action of the cavity pressure and the force, so that the cavity pressure is maintained within the preset pressure range, thereby keeping the external constant pressure device in a constant pressure environment.

[0013] Optionally, the deformable chamber includes a sac or a piston chamber.

[0014] Optionally, the pressure stabilizing device further includes an access channel connected to the deformable chamber, for injecting gas or liquid into the deformable chamber via the access channel, or for extracting gas or liquid from the deformable chamber via the access channel, thereby adjusting the chamber pressure formed in the deformable chamber so that the chamber pressure meets the preset pressure range.

[0015] Optionally, the pressure stabilizing structure includes an elastic element for providing an elastic force to the deformable chamber; wherein the deformable chamber deforms under the simultaneous action of the chamber pressure and the elastic force until the chamber pressure and the elastic force reach equilibrium, so that the chamber pressure formed in the deformable chamber is maintained within the preset pressure range.

[0016] Optionally, the cavity pressure formed within the deformable cavity is a positive pressure, and the elastic element is used to provide the deformable cavity with an elastic thrust corresponding to the preset pressure range; wherein, when the cavity pressure is less than the preset pressure range, the elastic thrust provided by the elastic element is greater than the cavity pressure, so that the deformable cavity undergoes contraction deformation under the action of the elastic thrust, thereby gradually increasing the cavity pressure until the cavity pressure and the elastic thrust reach equilibrium; when the cavity pressure is greater than the preset pressure range, the elastic thrust provided by the elastic element is less than the cavity pressure, so that the deformable cavity undergoes expansion deformation under the action of the cavity pressure, thereby gradually decreasing the cavity pressure until the cavity pressure and the elastic thrust reach equilibrium.

[0017] Optionally, the cavity pressure formed within the deformable cavity is negative, and the elastic element is used to provide an elastic traction force to the deformable cavity corresponding to the preset pressure range; wherein, when the cavity pressure is less than the preset pressure range, the elastic traction force provided by the elastic element is less than the cavity pressure, so that the deformable cavity undergoes contraction deformation under the action of the cavity pressure, causing the cavity pressure to gradually increase until the cavity pressure and the elastic traction force reach equilibrium; when the cavity pressure is greater than the preset pressure range, the elastic traction force provided by the elastic element is greater than the cavity pressure, so that the deformable cavity undergoes expansion deformation under the action of the elastic traction force, causing the cavity pressure to gradually decrease until the cavity pressure and the elastic traction force reach equilibrium.

[0018] Optionally, the elastic element includes a preset number of spring elements, the preset number of which is determined according to the preset pressure range, so that the elastic force provided by the elastic element is adapted to the preset pressure range.

[0019] Optionally, the spring element is a constant force spring.

[0020] Optionally, the voltage stabilizing structure further includes a linkage, through which the elastic member applies the elastic force to the deformable chamber; wherein the linkage has a contact surface that forms substantial contact with the deformable chamber.

[0021] Optionally, the cross-sectional area of ​​the contact surface is substantially the same as the cross-sectional area of ​​the deformable chamber; or, the cross-sectional area of ​​the contact surface is determined according to the preset pressure range.

[0022] Optionally, the voltage stabilizing device further includes an identifier for identifying the comparison result of the current cavity pressure in the deformable cavity with the preset pressure range.

[0023] Optionally, the external constant pressure device includes at least one of an endotracheal tube, a laryngeal mask, a pressure dressing bag, an air bag sleeve, and a drainage bag.

[0024] Another embodiment of this application provides a drainage device, which includes a drainage tube; a liquid storage chamber connected to the drainage tube; a deformable chamber having a cavity pressure that satisfies a preset negative pressure range; a filter structure disposed between the liquid storage chamber and the deformable chamber for allowing gas molecules to pass through and blocking liquid molecules; and a pressure stabilizing structure for applying a traction force to the deformable chamber; wherein the deformable chamber deforms under the simultaneous action of the cavity pressure and the traction force, so that the cavity pressure is maintained within the preset negative pressure range, thereby controlling the drainage tube to introduce the drainage fluid into the liquid storage chamber at a constant pressure.

[0025] Optionally, the drainage device further includes an access channel connected to the deformable chamber for extracting gas from the deformable chamber so that the chamber pressure formed in the deformable chamber meets the preset negative pressure range.

[0026] Optionally, the voltage stabilizing structure includes an elastic element for providing an elastic traction force to the deformable chamber; wherein the deformable chamber can undergo expansion deformation under the action of the elastic traction force of the elastic element; or, the deformable chamber can undergo contraction deformation under the action of the cavity pressure; and wherein the deformable chamber deforms under the simultaneous action of the cavity pressure and the traction force of the elastic element until the cavity pressure and the elastic traction force reach equilibrium.

[0027] As can be seen from the above technical solutions, the voltage stabilizing device of each embodiment of this application utilizes a deformable chamber with a cavity pressure that meets a preset pressure range, and a voltage stabilizing structure that can apply force to the deformable chamber. This allows the deformable chamber to expand or contract under the combined action of the current cavity pressure and the force of the voltage stabilizing structure, thereby dynamically adjusting the cavity pressure within the deformable chamber and ensuring that it remains within the preset pressure range. With this design, an external constant pressure device connected to the voltage stabilizing device of this application can be maintained in a constant pressure environment, which can improve the operational convenience and safety of the external constant pressure device.

[0028] The voltage stabilizing device of this application is applicable to various medical operating instruments that require constant pressure operation, and the force of the voltage stabilizing structure can be flexibly adjusted according to the actual constant pressure range requirements of the medical operating instrument. It has the advantages of simple structural design and wide applicability.

[0029] Furthermore, the drainage device provided in this application, through the design of a pressure-stabilizing structure, can enable the drainage tube to achieve constant pressure drainage operation in a constant negative pressure environment, thereby improving the safety of the drainage operation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0031] Figure 1 and Figure 2 This is a schematic diagram of an embodiment of the voltage stabilizing device according to the first embodiment of this application;

[0032] Figure 3 and Figure 4 This is a schematic diagram of an embodiment of the voltage stabilizing device according to the second embodiment of this application.

[0033] Figure 5 and Figure 6 This is a schematic diagram of an embodiment of the drainage device according to the third embodiment of this application.

[0034] Component designation

[0035] 1: Voltage stabilizing device;

[0036] 11: Deformable chamber;

[0037] 111: Pouch;

[0038] 112: Piston chamber;

[0039] 12: Tee pipe;

[0040] 13: Voltage stabilizing structure;

[0041] 131: Elastic component;

[0042] 132: Linkage component (connecting rod);

[0043] 1321: Contact surface;

[0044] 15: Access Channel;

[0045] 151: Hose;

[0046] 152: Valve;

[0047] 17: Identifier;

[0048] 171: First warning zone;

[0049] 172: Second warning zone;

[0050] 173: Normal area;

[0051] 2: Drainage device;

[0052] 21: Drainage tube;

[0053] 22: Liquid storage chamber;

[0054] 23: Deformable chamber;

[0055] 24: Filter structure;

[0056] 25: Voltage stabilizing structure;

[0057] 251: Elastic component;

[0058] 252: Linkage component;

[0059] 26: Access Channel;

[0060] 261: Valve;

[0061] 27: Identifier;

[0062] 271: First warning zone;

[0063] 272: Second warning zone;

[0064] 273: Normal area. Detailed Implementation

[0065] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0066] As mentioned in the background section, traditional endotracheal intubation is inconvenient due to the lack of constant pressure control, and the existing cuffs used in clinical practice do not have pressure monitoring functions. This can easily lead to problems such as air leakage from the cuff and tube dislodgement during pressure measurement using an external pressure gauge, which can threaten the patient's health.

[0067] To address the aforementioned technical challenges, the industry has proposed a medical constant pressure airbag. However, such airbags do not have an automatic pressure relief / replenishment function, which results in the pressure inside the airbag failing to achieve a constant effect.

[0068] In view of this, the first embodiment of this application proposes a pressure stabilizing device that can be used in conjunction with the aforementioned endotracheal tube to solve the various technical problems mentioned above. It should be noted that the pressure stabilizing device of this embodiment is not limited to the use environment of endotracheal tubes, but can also be used in conjunction with other medical devices that require constant pressure, such as pressure bandages.

[0069] refer to Figures 1 to 4 It shows schematic diagrams of different states of the voltage stabilizing device according to the first and second embodiments of this application.

[0070] As shown in the figure, the voltage stabilizing device 1 in this embodiment mainly includes a deformable chamber 11 and a voltage stabilizing structure 13. The deformable chamber 11 has a cavity pressure that meets a preset pressure range, and the deformable chamber 11 can be connected to an external constant pressure device.

[0071] Optionally, the external constant pressure device may be, for example, an endotracheal tube, a pressure dressing bag, or an air bag, but is not limited to these; it may also be any other medical device that requires constant pressure.

[0072] Optionally, the deformable chamber 11 is a pouch 111 (see reference). Figure 1 and Figure 2 ).

[0073] Optionally, the deformable chamber 11 can be a piston chamber 112 (see reference). Figure 3 and Figure 4 In this embodiment, the piston chamber 112 is, for example, a syringe structure.

[0074] In this embodiment, the preset pressure range can be adjusted according to the actual constant pressure requirements of the external constant pressure device, and it can be positive or negative pressure.

[0075] Optionally, the pressure stabilizing device 1 further includes an access channel 15, which communicates with the deformable chamber 11 to provide a gas passage for injecting or extracting gas into the deformable chamber 11, thereby adjusting the chamber pressure formed in the deformable chamber 11 so that the chamber pressure meets a preset pressure range.

[0076] For example, an external inflation / extraction device (not shown) can be connected to the access channel 15 to inject gas or liquid into the deformable chamber 11, thereby creating a positive pressure chamber pressure in the deformable chamber 11. Alternatively, the gas or liquid in the deformable chamber 11 can be extracted via the inflation / access channel 15 through the external inflation / extraction device, thereby creating a negative pressure chamber pressure in the deformable chamber 11.

[0077] In one embodiment, the inflation / de-inflation device connected to the access channel 15 can be an air pump / de-inflation pump to achieve automatic inflation / de-inflation operation; in another embodiment, the inflation / de-inflation device connected to the access channel 15 can also be an injection tube to achieve manual inflation / de-inflation operation. It should be noted that the inflation / de-inflation device is not limited to the above examples and can also be other structural designs.

[0078] Optionally, the voltage regulator 1 also includes a three-way valve 12 for providing communication between the deformable chamber 11, the access channel 15, and the external constant pressure device.

[0079] In this embodiment, the access channel 15 may include a hose 151, one end of which is connected to a three-way valve 12, and the other end of the hose 152 may be connected, for example, to a syringe (not shown) to perform an injection / evacuation operation on the deformable chamber 11 via the syringe and the hose 151.

[0080] Preferably, the access channel 15 also includes a valve 152 for opening or closing the internal passage of the hose 151 to facilitate the injection / evacuation operation of the deformable chamber 11 and prevent gas leakage problems.

[0081] Optionally, the voltage stabilizing structure 13 includes an elastic element 131 for providing an elastic force to the deformable chamber 11.

[0082] In this embodiment, the deformable chamber 11 deforms under the simultaneous action of cavity pressure and elastic force until the cavity pressure and elastic force reach equilibrium, so that the cavity pressure formed in the deformable chamber 11 is maintained within a preset pressure range.

[0083] In one embodiment, a positive pressure can be formed in the deformable chamber 11. In this case, the elastic member 131 is used to provide an elastic resisting force to the deformable chamber 11 corresponding to a preset pressure range, so that the deformable chamber 11 deforms in a direction away from the elastic member 131.

[0084] When the current cavity pressure in the deformable cavity 11 is less than the preset pressure range, the elastic thrust provided by the elastic member 131 is greater than the cavity pressure in the deformable cavity 11, so that the deformable cavity 11 is subjected to the elastic thrust and undergoes contraction deformation, causing the cavity pressure in the deformable cavity 11 to gradually increase until the cavity pressure in the deformable cavity 11 and the elastic thrust are rebalanced, thereby raising the cavity pressure level in the deformable cavity 11 to the preset pressure range.

[0085] When the current cavity pressure in the deformable cavity 11 is greater than the preset pressure range, the elastic thrust provided by the elastic member 131 is less than the cavity pressure in the deformable cavity 11, so that the deformable cavity 11 is subjected to the cavity pressure (positive pressure) and undergoes expansion deformation, so that the cavity pressure in the deformable cavity 11 gradually decreases until the cavity pressure in the deformable cavity 11 and the elastic thrust are rebalanced, thereby reducing the cavity pressure level in the deformable cavity 11 to the preset pressure range.

[0086] In another embodiment, a negative pressure can be formed in the deformable chamber 11. In this case, the elastic member 131 is used to provide an elastic traction force to the deformable chamber 11 corresponding to a preset pressure range, so that the deformable chamber 11 deforms toward the elastic member 131.

[0087] When the current cavity pressure in the deformable cavity 11 is less than the preset pressure range, the elastic traction force provided by the elastic element 131 is less than the cavity pressure in the deformable cavity 11, so that the deformable cavity 11 is subjected to cavity pressure (negative pressure) and undergoes contraction deformation, causing the cavity pressure in the deformable cavity 11 to gradually increase until the cavity pressure in the deformable cavity 11 and the elastic traction force are rebalanced, thereby reducing the cavity pressure level in the deformable cavity 11 to the preset pressure range.

[0088] When the current cavity pressure in the deformable cavity 11 is greater than the preset pressure range, the elastic traction force provided by the elastic element 131 is greater than the cavity pressure in the deformable cavity 11, so that the deformable cavity 11 is subjected to the elastic traction force to expand and deform, so that the cavity pressure in the deformable cavity 11 gradually decreases until the cavity pressure in the deformable cavity 11 and the elastic traction force are rebalanced, thereby reducing the cavity pressure level in the deformable cavity 11 to the preset pressure range.

[0089] In this embodiment, the elastic element 131 may include a preset number of spring elements, wherein the preset number of spring elements may be determined according to a preset pressure range, so that the elastic force provided by the elastic element 131 is adapted to the preset pressure range. However, this is not a limitation, and the magnitude of the elastic force provided by the elastic element 131 may also be adjusted by other means, which is not limited in this application.

[0090] Optionally, each spring element is a constant force spring.

[0091] Optionally, the voltage stabilizing structure 13 also includes a linkage 132, through which the elastic element 131 applies an elastic force to the deformable chamber 11.

[0092] In this embodiment, the linkage 132 is a connecting rod 132, but it is not limited to this and other linkage structure configurations can also be adopted.

[0093] Optionally, the linkage 132 has a contact surface 1321 that makes substantial contact with the deformable chamber 11.

[0094] Optionally, the cross-sectional area of ​​the contact surface 1321 between the linkage 132 and the deformable chamber 11 can be substantially the same as the cross-sectional area of ​​the deformable chamber 11, but is not limited thereto. The cross-sectional area of ​​the contact surface 1321 between the linkage 132 and the deformable chamber 11 can also be determined according to a preset pressure range. In this way, this application aims to achieve the technical effect of precisely controlling the cavity pressure of the deformable chamber 11 by adjusting the size of the cross-sectional area of ​​the contact surface 1321.

[0095] Optionally, the pressure stabilizing device 1 further includes an identifier 17 for identifying the comparison result of the current cavity pressure in the deformable chamber 11 with a preset pressure range.

[0096] In this embodiment, the current pressure state in the deformable chamber 11 can be determined by judging the relative position of the linkage 132 (linkage rod) with respect to the main body structure of the voltage stabilizing device 1. For example, the indicator 17 may include a device disposed on the linkage 132 (see reference). Figure 1 and Figure 2 ) or the main structure of the voltage regulator 1 (refer to Figure 3 and Figure 4The first warning area 171, the second warning area 172, and the normal area 173 are respectively used to indicate the comparison results of the current cavity pressure in the deformable cavity 11 being higher or lower than the preset pressure range; the normal area 173 is used to indicate the comparison results of the current cavity pressure in the deformable cavity 11 being within the preset pressure range.

[0097] In this application, when it is found that the relative position of the linkage 132 with respect to the main body structure of the voltage stabilizing device 1 is in the first warning area 171 or the second warning area 172 for a long time, it can be restored to the normal area 173 by manually replenishing or releasing pressure.

[0098] In summary, the pressure stabilizing device provided in this embodiment, by setting up a deformable chamber with cavity pressure and a pressure stabilizing structure for applying force to the deformable chamber, allows the deformable chamber to deform under the simultaneous action of cavity pressure and the applied force. This automatically achieves pressure replenishment or depressurization of the deformable chamber, ensuring that the cavity pressure of the deformable chamber is always maintained within a preset pressure range, thus allowing the connected external constant pressure device to maintain a constant pressure environment. Therefore, this application can passively provide a constant pressure operating environment and warnings for pressure changes to a series of external constant pressure devices such as endotracheal tubes, laryngeal masks, and cuffs, improving the operational convenience and safety of related medical devices.

[0099] Furthermore, this application allows for flexible adjustment of the force applied by the voltage stabilizing structure and / or the cross-sectional size of the contact surface between the linkage and the deformable chamber, thereby adapting it to external constant pressure devices with different constant pressure requirements and having a wide range of applications.

[0100] Figure 5 and Figure 6 The diagram shows different state embodiments of the drainage device 2 according to the second embodiment of this application.

[0101] As shown in the figure, the drainage device 2 in this embodiment mainly includes a drainage tube 21, a liquid storage chamber 22 connected to the drainage tube 21, a deformable chamber 23, a filter structure 24, and a pressure stabilizing structure 25.

[0102] Specifically, the deformable chamber 23 is formed with a chamber pressure that meets the preset negative pressure range.

[0103] Optionally, the drainage device 2 further includes an access channel 26, which connects to the deformable chamber 23, for providing a gas passage to extract gas from the deformable chamber 23, so that the cavity pressure formed in the deformable chamber 23 meets a preset negative pressure range.

[0104] Preferably, the access channel 26 also includes a valve 261 for opening or closing the access channel 26 to facilitate the injection / evacuation operation of the deformable chamber 23 and prevent gas leakage problems.

[0105] The filter structure 24 is located between the liquid storage chamber 22 and the deformable chamber 23, and is used to allow gas molecules to pass through while blocking liquid molecules.

[0106] In this embodiment, the filter structure 24 is, for example, a molecular sieve that is permeable to air but impermeable to liquid.

[0107] The voltage stabilizing structure 25 is used to apply traction force to the deformable chamber 23.

[0108] Specifically, the deformable chamber 23 can deform under the combined action of chamber pressure and traction force, so that the chamber pressure is kept within a preset negative pressure range, thereby controlling the drainage tube 21 to introduce the drainage fluid into the storage chamber 22 at a constant pressure.

[0109] Optionally, the voltage stabilizing structure 25 includes an elastic element 251 for providing elastic traction to the deformable chamber 23.

[0110] The deformable chamber 23 can expand under the elastic traction force of the elastic member 251, or it can contract under the pressure of the chamber.

[0111] In this embodiment, the deformable chamber 23 can be deformed by the simultaneous action of the cavity pressure and the traction force of the elastic member 131 until the cavity pressure and the elastic traction force in the deformable chamber 23 reach a balance.

[0112] Optionally, the voltage stabilizing structure 2 also includes a linkage 252, which connects the elastic member 251 and the deformable chamber 23 respectively, so that the elastic member 251 can apply an elastic traction force to the deformable chamber 23 via the linkage 252.

[0113] Optionally, the drainage device 2 also includes an identifier 27 for identifying the comparison result of the current cavity pressure in the deformable chamber 23 with a preset negative pressure range.

[0114] In this embodiment, the identifier 27 may also include a first warning area 271, a second warning area 272, and a normal area 273. The first warning area 271 and the second warning area 272 are used to identify the comparison results of whether the current cavity pressure in the deformable chamber 23 is higher or lower than a preset negative pressure range, respectively. The normal area 273 is used to identify the comparison results of whether the current cavity pressure in the deformable chamber 23 is within the preset negative pressure range.

[0115] In summary, the drainage device of this embodiment, through the design of a pressure-stabilizing structure and a deformable chamber, allows the deformable chamber to deform under the simultaneous action of cavity pressure and traction force, so that the cavity pressure in the deformable chamber is always maintained within a preset negative pressure range. This controls the drainage tube to guide the drainage into the storage chamber at a constant pressure, thereby improving the stability and safety of the drainage operation.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A voltage stabilizing device, characterized in that, include: A deformable chamber is formed inside which a cavity pressure is satisfied within a preset pressure range, and the deformable chamber is connected to an external constant pressure device; as well as A voltage-stabilizing structure is used to apply force to the deformable chamber; wherein... The deformable chamber can deform under the simultaneous action of the cavity pressure and the force, so that the cavity pressure is maintained within the preset pressure range, while the external constant pressure device is maintained in a constant pressure environment; The voltage stabilizing structure further includes a linkage component, which has a contact surface that makes substantial contact with the deformable chamber. The voltage stabilizing device also includes an indicator; the indicator includes a first warning area, a second warning area, and a normal area disposed on the linkage component, wherein the first warning area and the second warning area are used to indicate the comparison results of whether the current cavity pressure in the deformable chamber is higher or lower than a preset pressure range, respectively; the normal area is used to indicate the comparison results of whether the current cavity pressure in the deformable chamber is within the preset pressure range. When the relative position of the linkage component with respect to the main body structure of the voltage stabilizing device is in the first warning area or the second warning area for a long time, it is restored to the normal area by pressure replenishment or pressure relief. The pressure stabilizing structure includes an elastic element connected to the linkage element. The elastic element applies a constant preset elastic force to the deformable chamber via the linkage element. The deformable chamber deforms under the simultaneous action of the chamber pressure and the preset elastic force until the chamber pressure and the preset elastic force reach equilibrium, thereby maintaining the chamber pressure formed in the deformable chamber within the preset pressure range.

2. The voltage stabilizing device according to claim 1, characterized in that, The deformable chamber includes a sac or a piston chamber.

3. The voltage stabilizing device according to claim 2, characterized in that, The voltage stabilizing device also includes: An access channel, which connects to the deformable chamber, is used to inject gas or liquid into the deformable chamber via the access channel, or to extract gas or liquid from the deformable chamber via the access channel, thereby adjusting the chamber pressure formed within the deformable chamber so that the chamber pressure meets the preset pressure range.

4. The voltage stabilizing device according to claim 1, characterized in that, The cavity pressure formed within the deformable cavity is a positive pressure, and the elastic element is used to provide an elastic resisting force to the deformable cavity corresponding to the preset pressure range; and wherein... When the cavity pressure is less than the preset pressure range, the elastic thrust provided by the elastic element is greater than the cavity pressure, so that the deformable cavity is subjected to the elastic thrust to cause contraction and deformation, and the cavity pressure gradually increases until the cavity pressure and the elastic thrust reach equilibrium. When the cavity pressure is greater than the preset pressure range, the elastic thrust provided by the elastic element is less than the cavity pressure, so that the deformable cavity is expanded and deformed by the cavity pressure, and the cavity pressure gradually decreases until the cavity pressure and the elastic thrust reach equilibrium.

5. The voltage stabilizing device according to claim 1, characterized in that, The cavity pressure formed within the deformable cavity is negative, and the elastic element is used to provide an elastic traction force to the deformable cavity corresponding to the preset pressure range; and wherein... When the cavity pressure is less than the preset pressure range, the elastic traction force provided by the elastic element is less than the cavity pressure, so that the deformable cavity is subjected to the cavity pressure and undergoes contraction deformation, causing the cavity pressure to gradually increase until the cavity pressure and the elastic traction force reach a balance. When the cavity pressure is greater than the preset pressure range, the elastic traction force provided by the elastic element is greater than the cavity pressure, so that the deformable cavity is expanded and deformed by the elastic traction force, and the cavity pressure gradually decreases until the cavity pressure and the elastic traction force reach equilibrium.

6. The voltage stabilizing device according to claim 5, characterized in that, The elastic element includes a preset number of spring elements, the preset number of which is determined according to the preset pressure range, so that the preset elastic force provided by the elastic element is adapted to the preset pressure range.

7. The voltage stabilizing device according to claim 6, characterized in that, The spring element is a constant force spring.

8. The voltage stabilizing device according to claim 1, characterized in that, The cross-sectional area of ​​the contact surface is substantially the same as the cross-sectional area of ​​the deformable chamber; or, The cross-sectional area of ​​the contact surface is determined according to the preset pressure range.

9. The voltage stabilizing device according to claim 1, characterized in that, The external constant pressure device includes at least one of the following: endotracheal tube, laryngeal mask, pressure dressing bag, air bag sleeve, and drainage bag.

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