Breathing pipeline and breathing machine
By installing a heating wire inside the breathing tube and covering it with an insulation tube to form an air insulation layer, the problems of condensation and uneven heating in existing heated breathing tubes are solved, achieving more effective heating and reducing condensation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN BIYANG MEDICAL TECH CO LTD
- Filing Date
- 2025-01-23
- Publication Date
- 2026-05-19
AI Technical Summary
Existing heated breathing tubing is prone to condensation under high humidification conditions, leading to noise, blockage, and safety risks. Furthermore, existing heating methods suffer from uneven heating or excessive power consumption.
A heating wire is installed inside the breathing tube, and an insulation tube is wrapped around the outside. An air insulation layer is formed through a sealing component to reduce heat loss and temperature difference, thereby improving the heating effect.
It effectively reduces condensation, improves heating efficiency, avoids noise and blockages, and ensures safety.
Smart Images
Figure CN224251904U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ventilator technology, and in particular to a breathing tubing and a ventilator. Background Technology
[0002] As an accessory to a ventilator, the breathing tubing primarily connects the ventilator to the breathing mask, its main function being to deliver the air output from the ventilator to the breathing mask. Ventilators are generally equipped with integrated or separate humidifiers. The main function of the humidifier is to humidify the air output from the ventilator so that the humidified airflow can be delivered through the breathing tubing to the breathing mask, thereby moistening the patient's airway and preventing sputum from clumping together. In clinical applications, when the humidification power is high, the air in the breathing tubing contains a large amount of moisture. Because the external ambient temperature is lower than the temperature inside the ventilator's water tank, condensation will form on the walls of the breathing tubing. This condensation reduces the actual humidification efficiency and causes a large amount of condensation to accumulate in the breathing tubing or flow into the breathing mask. When condensation accumulates in the breathing tubing, the airflow passing through the tubing will disturb the water surface, generating noise. More seriously, when the condensation accumulates to a certain amount, it will reduce the ventilation area of the breathing tubing and may even directly cause blockage, leading to machine malfunction and alarms.
[0003] Currently, the main way to solve the problem of condensation in breathing tubing is to use heated breathing tubing. There are two main types of commonly used heated breathing tubing:
[0004] One type uses a spring heating wire, which is suspended inside the breathing tube. The heating wire heats the inside of the breathing tube. In this type of heating breathing tube, the heating wire is located in the middle of the tube. The temperature distribution inside the tube is as follows: the temperature in the center of the tube is higher, and the temperature on the tube wall is lower. In addition, the tube wall is in direct contact with the outside air, resulting in more heat loss. Although heating can reduce some condensation, the condensation problem on the tube wall is still quite serious under high humidity conditions. Furthermore, the uneven density of the spring heating wires can lead to uneven heating, and condensation will be more severe in areas where the heating wires are sparse.
[0005] Another type is the wall-wound heating wire, where the heating wire is integrally formed with the external corrugated tube. The heating wire is located in the interlayer of the breathing tubing wall. The advantage of this type of heated breathing tubing is that it can heat the breathing tubing evenly, avoiding condensation caused by uneven temperature. However, because the heating wire is in the interlayer of the tube wall, the temperature loss is relatively large, so the heating power needs to be adjusted to a higher level, which puts a heavy burden on the overall power of the machine. At the same time, high power means high current, which also places high demands on the electrical performance of the connectors. In addition, excessively high power may cause the heating wire itself to overheat, melting the surrounding tubing membrane, which in severe cases can lead to short circuits and safety hazards. Utility Model Content
[0006] The purpose of this invention is to provide a breathing tubing and a ventilator to alleviate the aforementioned problems in existing heated breathing tubing, thereby improving the heating effect of the breathing tubing while more effectively preventing or reducing the generation of condensate.
[0007] In a first aspect, the present invention provides a breathing tubing, including a breathing tubing body, wherein a heating wire is provided inside the breathing tubing body or on the outer wall of the breathing tubing body, and an insulation tube is sleeved on the outer side of the breathing tubing body, and each end of the breathing tubing body is sleeved with a corresponding sealing component, thereby sealing the outer sides of the two ends of the breathing tubing body and the inner sides of the two ends of the insulation tube through the sealing components; the insulation tube is a single-walled tube or a corrugated tube.
[0008] As one possible implementation, the sealing assembly includes a tubing connector that is sleeved onto both the end of the breathing tube and the end of the insulation tube.
[0009] As one possible implementation, the pipe connector includes a first connecting portion, the outer side of which is interference-fitted with the inner side of the end of the breathing tube, and the outer side of the end of the breathing tube is interference-fitted with the inner side of the end of the insulation tube.
[0010] As one possible implementation, the pipe connector includes a first connecting part and a second connecting part, wherein the outer side of the first connecting part is press-fitted with the inner side of the end of the breathing tube, and the outer side of the second connecting part is press-fitted with the inner side of the end of the insulation tube.
[0011] As one possible implementation, the sealing assembly further includes an elastic ring fitted onto the pipe joint, the inner side of which is in elastic contact with the outer side of the end of the insulation pipe.
[0012] As one possible implementation, the inner diameter of the elastic ring is smaller than the outer diameter of the breathing tube, the thickness of the elastic ring is 1.5 mm to 3 mm, and the hardness of the elastic ring is 30° to 50°.
[0013] As one possible implementation, the heating wire is suspended inside the breathing tube and extends spirally from one end of the breathing tube to the other end.
[0014] As one possible implementation, the breathing tube is made of a corrugated tube, and the breathing tube is integrally formed from a membrane and ribs, with the ribs spirally wound around the outer wall of the membrane; the heating wire is integrally formed with the breathing tube and is located in the interlayer between the outer wall of the membrane and the inner wall of the ribs.
[0015] As one possible implementation, the distance between the outer wall of the breathing tube and the inner wall of the insulation tube is 1.5 mm to 2 mm.
[0016] Secondly, this utility model also provides a ventilator, including the breathing tubing as described in the first aspect above.
[0017] This utility model provides a breathing tubing and ventilator. By installing a heating wire inside or on the outer wall of the breathing tubing, and covering the outer side of the breathing tubing with a single-walled tube or corrugated tube as an insulation tube, and by installing corresponding sealing components at both ends of the breathing tubing to seal the outer sides of the breathing tubing and the inner sides of the insulation tube, an air insulation layer is formed between the outer wall of the breathing tubing and the inner wall of the insulation tube. Compared with existing heated breathing tubing, this avoids direct contact between the outer wall of the breathing tubing and the outside, reduces heat loss from the tubing wall, and reduces the temperature difference between the inside of the breathing tubing and the wall. This improves the heating effect of the breathing tubing while more effectively preventing or reducing the generation of condensate. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of a breathing tubing in an embodiment of this utility model;
[0020] Figure 2 This is a partial cross-sectional view of the first type of breathing tubing in the embodiments of this utility model;
[0021] Figure 3 This is a partial cross-sectional view of the second type of breathing tubing in this embodiment of the present invention;
[0022] Figure 4 This is a partial cross-sectional view of the third type of breathing tubing in this embodiment of the present invention;
[0023] Figure 5 This is a partial cross-sectional view of the fourth type of breathing tubing in this embodiment of the present invention;
[0024] Figure 6 This is a partial cross-sectional view of the fifth type of breathing tubing in this embodiment of the present invention;
[0025] Figure 7 This is a partial cross-sectional view of the sixth type of breathing tubing in this embodiment of the present invention;
[0026] Figure 8 This is a partial cross-sectional view of the seventh type of breathing tubing in this embodiment of the present invention;
[0027] Figure 9 This is a three-dimensional structural diagram of the pipe joint in an embodiment of the present utility model;
[0028] Figure 10 This is an example diagram showing the changes in the inner tube temperature and the insulation layer temperature over time when the air insulation layer thickness is 1.5mm in an embodiment of this utility model.
[0029] Figure 11 This is an example diagram showing the changes in the inner tube temperature and the insulation layer temperature over time when the air insulation layer thickness is 2mm in an embodiment of this utility model.
[0030] Icons: 100-Breathing tube body; 101-Tube membrane; 102-Reinforcing strip; 200-Insulation tube; 201-Heat shrinkable part; 202-Heat shrinkable connector; 300-Tube connector; 301-First connection part; 302-Second connection part; 400-Heating wire; 500-Air insulation layer; 600-Elastic ring. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0038] See Figures 1 to 9 As shown, this utility model provides a breathing tubing, which may include a breathing tubing body 100. A heating wire 400 may be provided inside the breathing tubing body 100 or on its outer wall. An insulation tube 200 may be sleeved on the outside of the breathing tubing body 100. Each end of the breathing tubing body 100 may be sleeved with a corresponding sealing component, which can seal the outer sides of both ends of the breathing tubing body 100 and the inner sides of both ends of the insulation tube 200. The insulation tube 200 may be a single-walled tube or a corrugated tube.
[0039] This utility model provides a breathing tubing and ventilator. By installing a heating wire inside or on the outer wall of the breathing tubing, and covering the outer side of the breathing tubing with a single-walled tube or corrugated tube as an insulation tube, and by installing corresponding sealing components at both ends of the breathing tubing to seal the outer sides of the breathing tubing and the inner sides of the insulation tube, an air insulation layer is formed between the outer wall of the breathing tubing and the inner wall of the insulation tube. Compared with existing heated breathing tubing, this avoids direct contact between the outer wall of the breathing tubing and the outside, reduces heat loss from the tubing wall, and reduces the temperature difference between the inside of the breathing tubing and the wall. This improves the heating effect of the breathing tubing while more effectively preventing or reducing the generation of condensate.
[0040] As one possible implementation method, see Figures 1 to 9 As shown, the sealing assembly may include a pipe connector 300, which can be sleeved to the end of the breathing tube 100 and the end of the insulation tube 200, respectively.
[0041] As one possible implementation method, see Figures 1 to 9 As shown, the pipe connector 300 may include a first connecting part 301. The outer side of the first connecting part 301 may be press-fitted with the inner side of the end of the breathing tube body 100, and the outer side of the end of the breathing tube body 100 may be press-fitted with the inner side of the end of the insulation tube 200.
[0042] As one possible implementation method, see Figures 1 to 9 As shown, the pipe connector 300 may include a first connecting part 301 and a second connecting part 302. The outer side of the first connecting part 301 may be press-fitted with the inner side of the end of the breathing tube body 100, and the outer side of the second connecting part 302 may be press-fitted with the inner side of the end of the insulation tube 200.
[0043] As one possible implementation method, see Figures 4 to 6 As shown, the sealing assembly may also include an elastic ring 600 sleeved on the pipe joint 300, the inner side of the elastic ring 600 being in elastic contact with the outer side of the end of the insulation pipe 200.
[0044] As one possible implementation method, see Figures 4 to 6 As shown, the inner diameter of the elastic ring 600 is smaller than the outer diameter of the breathing tube body 100, the thickness of the elastic ring 600 can be 1.5mm to 3mm, and the hardness of the elastic ring 600 can be 30° to 50°.
[0045] As one possible implementation method, see Figures 1 to 9 As shown, the heating wire 400 can be suspended inside the breathing tube 100, and the heating wire 400 can extend spirally from one end of the breathing tube 100 to the other end of the breathing tube 100.
[0046] As one possible implementation method, see Figures 1 to 9 As shown, the breathing tube body 100 can be made of corrugated tubing, and the breathing tube body 100 can be integrally formed from a membrane 101 and a rib 102. The rib 102 can be spirally wound around the outer wall of the membrane 101. The heating wire 400 can be integrally formed with the breathing tube body 100, and the heating wire 400 can be located in the interlayer between the outer wall of the membrane 101 and the inner wall of the rib 102.
[0047] As one possible implementation method, see Figures 1 to 9 As shown, the distance between the outer wall of the breathing tube 100 and the inner wall of the insulation tube 200 can be 1.5mm to 2mm.
[0048] For ease of understanding, the structure and effects of the breathing tubing provided by this utility model are described exemplarily below using a specific application example.
[0049] See Figures 1 to 9 As shown, the embodiments of this utility model mainly provide the following three types of breathing tubing:
[0050] The first method involves directly attaching a single-walled tube of heat-shrinkable material (including but not limited to POF, PE, PVC, EVA, PET, etc.) as an insulation tube 200 to the outside of the breathing tube body 100. The outer diameter of the insulation tube 200 is slightly larger than the outer diameter of the inner tube (i.e., the breathing tube body 100 at this time). The breathing tube body 100 is inserted into the insulation tube 200 using a tool. Then, both ends of the breathing tube body 100 are respectively attached to the corresponding pipe joints 300. A hot air gun or other local heating device is then used to heat both ends of the insulation tube 200, causing the ends of the insulation tube 200 to shrink due to heat and tightly connect with the pipe joints 300. This allows the space between the inner tube and the outer tube (i.e., the insulation tube 200 at this time) to act as an air insulation layer 500, isolating it from the outside and preventing the air inside the air insulation layer 500 from flowing and exchanging heat with the outside air. Regardless of whether a heating breathing line using a wall-wound heating wire or a spring-heated heating wire is used, the first type can be employed. Regarding the first type, Figure 2 and Figure 3 The structures of the first and second breathing circuits are shown respectively.
[0051] For cases using wall-wound heating wires, see [link to relevant documentation]. Figure 2As shown, the first type of breathing tubing includes a breathing tubing body 100. The breathing tubing body 100 is a corrugated tube integrally formed from a membrane 101 and ribs 102. The ribs 102 are spirally wound around the outer wall of the membrane 101. The heating wire 400 is integrally formed with the breathing tubing body 100 and is disposed in the interlayer between the outer wall of the membrane 101 and the inner wall of the ribs 102. A heat-shrinkable single-walled tube is sleeved on the outside of the breathing tubing body 100 as an insulation tube 200. Each end of the breathing tubing body 100 is fitted with a corresponding pipe connector 300, and the pipe connectors 300 are used to seal the outer sides of the two ends of the breathing tubing body 100 and the inner sides of the two ends of the insulation tube 200. Specifically, the pipe connector 300 includes a first connecting part 301 and a second connecting part 302. The outer side of the first connecting part 301 is in an interference fit with the inner side of the end of the breathing tube body 100. A hot air gun or other local heating device can be used to heat the end of the insulation tube 200, so that the end of the insulation tube 200 shrinks due to heat to form a heat shrinkable part 201. The inner side of the heat shrinkable part 201 is in close contact with the outer side of the second connecting part 302 (which can be an interference fit).
[0052] For cases using spring heating wires, see [link to relevant documentation]. Figure 3 As shown, the second type of breathing tubing includes a breathing tubing body 100. The breathing tubing body 100 is a corrugated tube integrally formed from a membrane 101 and ribs 102. The ribs 102 are spirally wound around the outer wall of the membrane 101. The heating wire 400 is suspended inside the breathing tubing body 100 and extends spirally from one end of the breathing tubing body 100 to the other end. A heat-shrinkable single-walled tube is fitted on the outside of the breathing tubing body 100 as an insulation tube 200. Each end of the breathing tubing body 100 is fitted with a corresponding pipe connector 300, and the pipe connectors 300 are used to seal the outer sides of the two ends of the breathing tubing body 100 and the inner sides of the two ends of the insulation tube 200. Specifically, the pipe connector 300 includes a first connecting part 301. The outer side of the first connecting part 301 is in an interference fit with the inner side of the end of the breathing tube body 100. A hot air gun or other local heating device can be used to heat the end of the insulation tube 200, so that the end of the insulation tube 200 shrinks due to heat to form a heat shrinkable part 201. The inner side of the heat shrinkable part 201 is in close contact with the outer side of the end of the breathing tube body 100 (which can be an interference fit).
[0053] The second method: Instead of using heat-shrink technology, an elastic silicone ring (i.e., elastic ring 600) is used at the pipe joint 300. The elasticity of the silicone ring connects and seals the outer tube (i.e., the insulation tube 200) to the pipe joint 300. This method is suitable not only for heat-shrinkable membranes and hoses but also for those without heat-shrink properties. The inner diameter of the elastic silicone ring is slightly smaller than the outer diameter of the pipe joint 300. For example, if the outer diameter of the pipe joint 300 is 23mm, the inner diameter of the elastic silicone ring is approximately 20mm to 21mm. The thickness of the elastic silicone ring is generally 1.5mm to 3mm, and its hardness is generally 30° to 50°. When installing the breathing tubing, a flaring pliers can be used to open the elastic silicone ring, and the tubing ends (including the inner and outer tube ends) are passed through the elastic silicone ring. The elasticity of the silicone ring itself tightly clamps it onto the pipe joint 300, simultaneously fixing the outer membrane to the pipe joint 300. Using this type of pipe joint results in a more aesthetically pleasing appearance at 300 points. Since heat-shrink film may wrinkle during installation, leading to poor sealing, an elastic silicone ring can be added to the first type of joint. This means the second type can also be used in conjunction with the first to achieve optimal sealing and appearance. The second type can be used for both wall-wound heating wire and spring-heated breathing tubing. Regarding the second type... Figures 4 to 6 The structures of the third to fifth breathing circuits are shown respectively.
[0054] For cases using spring heating wires, see [link to relevant documentation]. Figure 4 As shown, the third type of breathing tubing includes a breathing tubing body 100. The breathing tubing body 100 is a corrugated tube integrally formed from a membrane 101 and ribs 102. The ribs 102 are spirally wound around the outer wall of the membrane 101. The heating wire 400 is suspended inside the breathing tubing body 100 and extends spirally from one end of the breathing tubing body 100 to the other end. A heat-shrinkable single-walled tube is fitted on the outside of the breathing tubing body 100 as an insulation tube 200. Each end of the breathing tubing body 100 is fitted with a corresponding pipe joint 300 and an elastic ring 600. The pipe joint 300 and the elastic ring 600 are used to seal the outer sides of the two ends of the breathing tubing body 100 and the inner sides of the two ends of the insulation tube 200. Specifically, the pipe connector 300 includes a first connecting part 301, the outer side of the first connecting part 301 is in interference fit with the inner side of the end of the breathing tube body 100, the end of the insulation tube 200 is provided with a heat shrink connector 202, the inner side of the heat shrink connector 202 is in close contact with the outer side of the end of the breathing tube body 100 (which can be an interference fit), and the inner side of the elastic ring 600 is in elastic contact with the outer side of the heat shrink connector 202. The elasticity of the elastic ring 600 forms a seal between the heat shrink connector 202 and the end of the breathing tube body 100 at the pipe connector 300.
[0055] For cases using wall-wound heating wires, see [link to relevant documentation]. Figure 5 As shown, the fourth type of breathing tubing includes a breathing tubing body 100. The breathing tubing body 100 is a corrugated tube integrally formed from a membrane 101 and ribs 102. The ribs 102 are spirally wound around the outer wall of the membrane 101. The heating wire 400 is integrally formed with the breathing tubing body 100 and is disposed in the interlayer between the outer wall of the membrane 101 and the inner wall of the ribs 102. A heat-shrinkable single-walled tube is sleeved on the outside of the breathing tubing body 100 as an insulation tube 200. Each end of the breathing tubing body 100 is fitted with a corresponding pipe joint 300 and an elastic ring 600. The pipe joints 300 and the elastic rings 600 are used to seal the outer sides of the two ends of the breathing tubing body 100 and the inner sides of the two ends of the insulation tube 200. Specifically, the pipe joint 300 includes a first connecting part 301 and a second connecting part 302. The outer side of the first connecting part 301 is in an interference fit with the inner side of the end of the breathing tube body 100. A hot air gun or other local heating device can be used to heat the end of the insulation tube 200, so that the end of the insulation tube 200 shrinks due to heat, and the inner side of the end of the insulation tube 200 is in close contact with the outer side of the second connecting part 302 (which can be an interference fit). The inner side of the elastic ring 600 is in elastic contact with the outer side of the end of the insulation tube 200. The elasticity of the elastic ring 600 forms a seal between the end of the insulation tube 200 and the end of the breathing tube body 100 at the pipe joint 300.
[0056] For cases using spring heating wires, see [link to relevant documentation]. Figure 6 As shown, the difference between the fifth type of breathing tubing and the third type is that the fifth type of breathing tubing does not require a heat shrink connector 202 at the end of the insulation tube 200. A hot air gun or other local heating device can be used to heat the end of the insulation tube 200, causing it to shrink due to heat. This results in a tight contact (interference fit) between the inner side of the insulation tube 200 and the outer side of the breathing tube body 100. The inner side of the elastic ring 600 makes elastic contact with the outer side of the insulation tube 200, and the elasticity of the elastic ring 600 creates a seal at the tubing connector 300 between the end of the insulation tube 200 and the end of the breathing tube body 100. For brevity, the structural similarities between the fifth and third types of breathing tubing will not be described in detail here.
[0057] The third type: The outer tube is made of PVC or other corrugated pipe, that is, the gap between the two corrugated pipes (i.e., the inner tube and the outer tube) is used as an air insulation layer to achieve the effect of insulating the external temperature; the inner diameter of the outer tube is 3mm to 5mm larger than the outer diameter of the inner tube, so as to facilitate the assembly of the two corrugated pipes and also to ensure that the space of the air insulation layer is not too large, so that temperature equilibrium can be reached earlier during clinical use and the generation of condensate can be reduced. The pipe connector 300 includes a first connecting part 301 and a second connecting part 302. The end of the inner corrugated tube (i.e., the breathing tube body 100 at this time) is connected to the first connecting part 301. The inner wall of the end of the inner corrugated tube is press-fitted with the outer side of the first connecting part 301. During the production process, a solvent-based adhesive can be applied to make the connection between the end of the inner corrugated tube and the first connecting part 301 firm and sealed. The end of the outer corrugated tube (i.e., the insulation tube 200 at this time) is connected to the second connecting part 302. Similarly, the inner wall of the end of the outer corrugated tube is press-fitted with the outer side of the second connecting part 302. The connection between the end of the outer corrugated tube and the first connecting part 301 can also be made firm and sealed by applying a solvent-based adhesive. The sealing of the ends of the inner and outer corrugated tubes by the pipe connector 300 forms an air insulation layer. The third form is also applicable to heating breathing tubes using wall-wound heating wires and heating breathing tubes using spring heating wires.
[0058] For cases using wall-wound heating wires, see [link to relevant documentation]. Figure 7 As shown, the sixth type of breathing tubing includes a breathing tubing body 100. The breathing tubing body 100 is a corrugated tube integrally formed from a membrane 101 and ribs 102. The ribs 102 are spirally wound around the outer wall of the membrane 101. The heating wire 400 is integrally formed with the breathing tubing body 100 and is disposed in the interlayer between the outer wall of the membrane 101 and the inner wall of the ribs 102. A corrugated tube is sleeved on the outside of the breathing tubing body 100 as a heat insulation tube 200. The outer sides of both ends of the breathing tubing body 100 and the inner sides of both ends of the heat insulation tube 200 are sealed through the tubing joints 300 (including the first connecting part 301 and the second connecting part 302). Specifically, the outer side of the first connecting part 301 is press-fitted with the inner side of the end of the breathing tube body 100, and the outer side of the second connecting part 302 is press-fitted with the inner side of the end of the insulation tube 200. The first connecting part 301 and the second connecting part 302 form a seal at the pipe joint 300 between the end of the insulation tube 200 and the end of the breathing tube body 100.
[0059] For cases using spring heating wires, see [link to relevant documentation]. Figure 8 As shown, the difference between the seventh and sixth breathing circuits is that the heating wire 400 is suspended inside the breathing tube body 100 and extends spirally from one end of the breathing tube body 100 to the other end. For the sake of brevity, the structural similarities between the seventh and sixth breathing circuits will not be described in detail here.
[0060] By using the above-mentioned breathing duct, an air insulation layer can be formed on the outside of the inner tube. The main function of the air insulation layer is to act as a temperature buffer to increase the temperature of the inner tube and slow down the heat dissipation rate of the inner tube itself, thereby improving the humidification efficiency and reducing condensation.
[0061] In practical applications, the thickness of the air insulation layer (i.e., the difference between the outer diameter of the inner tube and the inner diameter of the outer tube) should not be too large or too small. Based on clinical testing, the thickness of the air insulation layer should be set to 1.5mm to 2mm. Figure 10 and Figure 11 The changes in the inner tube temperature and the insulation layer temperature over time are shown when the air insulation layer thickness is 1.5 mm and 2 mm, respectively.
[0062] like Figure 10 As shown, at a room temperature of 18℃, the thickness of the air insulation layer 500 is set to 1.5mm. The temperature of the air insulation layer 500 reaches thermal equilibrium after 35 minutes of operation, with an equilibrium temperature of 33℃. Figure 11 As shown, when the thickness of the air insulation layer 500 is set to 2mm, due to the increased space within the air insulation layer, the time to reach thermal equilibrium is approximately 50 minutes, and the equilibrium temperature of the air insulation layer also decreases to around 31℃. It can be seen that an excessively thick air insulation layer 500 will result in a slow temperature rise, failing to achieve the desired insulation effect. An excessively thick air insulation layer 500 will also increase the overall outer diameter of the tubing, making the overall tubing size larger and affecting the convenience of patient use. Conversely, an insufficiently thick air insulation layer 500 will make tubing installation more difficult, and when the tubing is bent, the inner and outer tubing membranes will directly contact and exchange heat, causing heat loss and reducing the insulation effect. Therefore, the setting of the air insulation layer 500 thickness needs to consider the time required for the air insulation layer 500 to reach thermal equilibrium, the equilibrium temperature of the air insulation layer 500, and the overall size of the tubing. By reasonably setting the thickness of the air insulation layer 500, the insulation effect of the breathing tubing and the convenience of installation and use can be guaranteed.
[0063] This utility model embodiment also provides a ventilator, which may include the breathing tubing provided in the above embodiment.
[0064] Since the ventilator includes all the features of the above-described breathing circuit embodiments, the ventilator can produce the same technical effects as the breathing circuit described above, which will not be elaborated further.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A breathing circuit, characterized by, The device includes a breathing tube body, with a heating wire provided inside the breathing tube body or on the outer wall of the breathing tube body. An insulation tube is fitted on the outer side of the breathing tube body, and each end of the breathing tube body is fitted with a corresponding sealing component. The sealing components are used to seal the outer sides of the two ends of the breathing tube body and the inner sides of the two ends of the insulation tube. The insulation tube is a single-walled tube or a corrugated tube.
2. Breathing tube according to claim 1, characterized in that The sealing assembly includes a pipe connector, which is sleeved onto the end of the breathing tube and the end of the insulation tube, respectively.
3. Breathing tube according to claim 2, characterized in that The pipe connector includes a first connecting part, the outer side of which is interference-fitted with the inner side of the end of the breathing tube, and the outer side of the end of the breathing tube is interference-fitted with the inner side of the end of the insulation tube.
4. The breathing tube of claim 2, wherein, The pipe connector includes a first connecting part and a second connecting part. The outer side of the first connecting part is press-fitted with the inner side of the end of the breathing tube, and the outer side of the second connecting part is press-fitted with the inner side of the end of the insulation tube.
5. Breathing tube according to claim 3 or 4, characterized in that The sealing assembly also includes an elastic ring sleeved on the pipe joint, with the inner side of the elastic ring in elastic contact with the outer side of the end of the insulation pipe.
6. Breathing tube according to claim 5, characterized in that The inner diameter of the elastic ring is smaller than the outer diameter of the breathing tube, the thickness of the elastic ring is 1.5mm to 3mm, and the hardness of the elastic ring is 30° to 50°.
7. The breathing tube of claim 1, wherein, The heating wire is suspended inside the breathing tube and extends spirally from one end of the breathing tube to the other end.
8. The breathing tube of claim 1, wherein, The breathing tube is made of corrugated tubing and is integrally formed from a membrane and reinforcing ribs, with the reinforcing ribs spirally wound around the outer wall of the membrane. The heating wire is integrally formed with the breathing tube and is located in the interlayer between the outer wall of the membrane and the inner wall of the reinforcing ribs.
9. The breathing tube of claim 1, wherein, The distance between the outer wall of the breathing tube and the inner wall of the insulation tube is 1.5mm to 2mm.
10. A breathing machine characterized by, Including the breathing tubing as described in any one of claims 1-9.