Air flow conveying device and breathing device

Abstract

The present invention relates to an airflow conveying device and a breathing device, and to the technical field of ventilators. The airflow conveying device of the present invention comprises a breathing tube, wherein the breathing tube is provided with a heating assembly, the heating assembly comprising a heating body and a covering member provided outside the heating body, the heating body being used to heat and maintain the temperature of the airflow in the breathing tube; wherein the covering member is constructed so that the heat dissipation of the portion close to the heating body is greater than the heat dissipation of the portion far from the heating body. The heating body of the heating assembly can ensure that the breathing tube has a sufficient heat preservation effect, and different portions of the covering member covering the outside of the heating body adopt different heat dissipation methods, i.e., the heat dissipation speed of the portion close to the heating body is fast and the heat dissipation is large, while the heat dissipation speed of the portion far from the heating body is slow and the heat dissipation is small, thereby reducing the maximum temperature that the outer surface of the breathing tube can reach, and this maximum temperature will not cause discomfort to the patient, thereby improving the comfort and safety of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilators, and in particular to an airflow delivery device and a breathing apparatus. Background Art

[0002] In the breathing circuit of a respiratory system, air flows through various components before being delivered to the patient. The breathing tube, as a component of the breathing circuit, is used to deliver air to the patient. Maintaining the appropriate temperature and humidity of the air delivered to the patient can reduce the time it takes for the patient to recover from surgery. Early breathing tubes lacked components to heat the tubes, resulting in heat loss in the airflow and condensation on the cold tube walls.

[0003] Existing breathing tubes are generally provided with heating elements to maintain the temperature of the airflow in the breathing tube. However, among the existing technologies for heating breathing tubes, one is to use a breathing tube with a smaller wall thickness, which can reduce the weight of the tube. However, in this solution, the heating wire is arranged inside the breathing tube. Since the wall thickness of the breathing tube is relatively small, the outer surface of the breathing tube is affected by the heating wire in close contact with it, resulting in the temperature of the outer surface of the breathing tube being too high. If there is an unexpected long-term contact with the patient's skin, it will cause the patient to feel uncomfortable or suffer from low-temperature burns. Another method is to use a breathing tube with a larger wall thickness or use a multi-layer pipeline to avoid the phenomenon of the outer wall temperature of the breathing tube being too high. However, in these solutions, due to the large wall thickness of the breathing tube or the addition of multiple layers of pipelines, the pipeline will be too heavy and too hard, thereby affecting the patient's movement and convenience of use. Summary of the Invention

[0004] The present invention provides an air flow conveying device and a breathing device, which are used to solve at least one of the above problems.

[0005] The present invention provides an airflow conveying device, comprising a breathing tube, wherein the breathing tube is provided with a heating assembly, wherein the heating assembly comprises a heating body and a covering member provided outside the heating body, wherein the heating body is used to heat and maintain the temperature of the airflow in the breathing tube;

[0006] The covering member is configured such that a portion close to the heating body dissipates more heat than a portion far from the heating body.

[0007] In one embodiment, the covering member includes ribs provided on the outer wall of the breathing tube, and the heating body is provided between the ribs and the outer wall of the breathing tube;

[0008] The rib is provided with at least one first recessed portion recessed inward from the surface of the rib at a bottom portion close to the outer wall of the breathing tube.

[0009] In one embodiment, the first recessed portion is provided at a position above the corresponding heating body.

[0010] In one embodiment, the rib is further provided with at least one second recessed portion recessed inwardly from the surface of the rib at the bottom near the outer wall of the breathing tube;

[0011] The first recessed portion and the second recessed portion extend toward each other.

[0012] In one embodiment, the first recessed portion and the second recessed portion are symmetrically arranged with respect to a radial direction of the breathing tube.

[0013] In one embodiment, the inner surface of the first recessed portion is configured as a combination of one or more of a curved surface, a flat surface, and an inclined surface.

[0014] In one embodiment, the inner surface of the second recessed portion is configured as a combination of one or more of a curved surface, a flat surface, and an inclined surface.

[0015] In one embodiment, the thermal conductivity of the surface at the top of the rib is lower than the thermal conductivity of the surface of the rest of the rib.

[0016] In one embodiment, the thermal conductivity of the surface at the top of the rib above the first recessed portion is lower than the thermal conductivity of the surface of the remaining portion of the rib.

[0017] In one embodiment, the thermal conductivity of the surface at the top of the rib above the first and second recessed portions is lower than the thermal conductivity of the surface of the remaining portion of the rib.

[0018] In one embodiment, the rib is constructed as one or more of the following combinations:

[0019] a spiral rib extending spirally along the axial direction of the breathing tube;

[0020] a straight rib extending along the axial direction of the breathing tube;

[0021] The annular rib can cover at least a portion of the outer wall of the breathing tube.

[0022] In one embodiment, a second supporting portion is provided between the first recessed portion and the second recessed portion, the second supporting portion is connected to the bottom of the rib and the top of the rib respectively, and the second supporting portion dissipates heat by heat conduction.

[0023] In one embodiment, the heating body is located between the bottom end of the rib and the outer wall of the breathing duct, close to the first recessed portion and / or the second recessed portion, and away from the second supporting portion.

[0024] In one embodiment, the first recessed portion and / or the second recessed portion are respectively located above the corresponding heating body.

[0025] In one embodiment, the heating body is configured as a heating wire extending in the extending direction of the rib.

[0026] In one embodiment, the heating assembly further comprises a signal line embedded in the outer wall of the breathing tube.

[0027] In one embodiment, the breathing tube is formed of a tubular membrane, the inner wall of the tubular membrane forming a ventilation airway for conveying airflow.

[0028] In one embodiment, both ends of the breathing tube are respectively connected to a first connector for connecting to a ventilator and a second connector for connecting to a breathing mask.

[0029] According to a second aspect of the present invention, the present invention provides a breathing apparatus comprising the above-mentioned airflow delivery device, a respirator and a breathing mask, wherein the airflow delivery device is connected to the respirator and the breathing mask respectively.

[0030] Compared with the prior art, the advantages of the present invention are:

[0031] The heating body of the heating assembly can ensure that the breathing tube has sufficient thermal insulation effect, and different parts of the covering component covering the outside of the heating body adopt different heat dissipation methods, that is, the heat dissipation speed of the part close to the heating body is fast and the heat dissipation amount is large, and the heat dissipation speed of the part far from the heating body is slow and the heat dissipation amount is small, thereby reducing the maximum temperature that the outer surface of the breathing tube can reach. This maximum temperature will not cause discomfort to the patient, thereby improving the patient's comfort and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

[0033] Figure 1 2 is a schematic diagram of the three-dimensional structure of the air flow conveying device in an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the breathing tube shown;

[0035] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the heating assembly is shown, wherein the breathing tube is hidden;

[0036] Figure 4a and Figure 4bis a radial cross-sectional view of the heating assembly in Example 1 of the present invention;

[0037] Figure 5a and Figure 5b is a radial cross-sectional view of the heating assembly in Example 2 of the present invention;

[0038] Figure 6 is a radial cross-sectional view of the heating assembly in Example 2 of the present invention, showing heat dissipation paths at the first recessed portion and the second recessed portion;

[0039] Figure 7 It is a radial cross-sectional view of the heating component in Example 3 of the present invention.

[0040] Reference numerals:

[0041] 1-first connector; 2-breathing tube; 3-second connector;

[0042] 21- tubular film; 22- heating component;

[0043] 221-rib; 222-heating element; 223-signal line; 224-top; 225-bottom;

[0044] 201, 202, 203 - first recessed portion; 204, 205 - second recessed portion;

[0045] 201a, 201b - opposite inner walls; 201c - inner bottom wall;

[0046] 203a-first inner wall; 203b-second inner wall; 203c-third inner wall;

[0047] 251-first support portion; 252, 253-second support portion;

[0048] 261-first hook; 262-second hook. DETAILED DESCRIPTION

[0049] The present invention will be further described below with reference to the accompanying drawings.

[0050] like Figure 1-Figure 3 As shown, according to a first aspect of the present invention, an airflow delivery device is provided, comprising a breathing tube 2 for delivering airflow from a ventilator to the mouth and nose of a user. A heating assembly 22 is provided on the breathing tube 2. The heating assembly 22 heats the airflow in the breathing tube 2, thereby maintaining the temperature of the airflow therein and reducing condensation. This ensures that the airflow enters the human body at an appropriate temperature and humidity, thereby reducing the time required for the patient to recover from surgery and improving patient comfort. Furthermore, the heating assembly 22 controls the temperature of the airflow, allowing for selection of appropriate treatments for individual patients.

[0051] Among them, the heating component 22 includes a heating body 222 and a covering member. The heating body 222 can keep the temperature and humidity of the airflow in the breathing tube 2 at an appropriate level. The covering member is arranged on the outside of the heating body, and is constructed so that the heat dissipation speed of the part close to the heating body 222 is fast and the heat dissipation amount is large, and the heat dissipation speed of the part away from the heating body 222 is slow and the heat dissipation amount is small. Because the heating body 222 transfers heat to the outside when heating the airflow in the breathing tube 2. By setting the heat dissipation speed and heat dissipation amount of the part of the covering member close to the heating body 222 to be larger, more heat can be dissipated into the air as quickly as possible, and less heat can be transferred more slowly to the heating component 22 on the top surface of the covering member, so as to avoid causing discomfort or low-temperature burns to the patient. The specific structure of the heating component 22 in the present invention is illustrated below with specific embodiments.

[0052] Example 1

[0053] Please combine Figure 2 、 Figure 3 、 Figure 4a and Figure 4b The covering member includes ribs 221 provided on the outer wall of the breathing tube 2, such as Figure 4a As shown, the bottom 225 of the rib 221 is the portion close to the outer wall of the breathing tube 2, or the bottom 225 may be in contact with the outer wall of the breathing tube 2; the top 224 of the rib 221 is the portion away from the outer wall of the breathing tube 2. Therefore, the bottom 225 and top 224 of the rib 221 are respectively relative to the outer wall of the breathing tube 2. The heater 222 is disposed between the bottom end of the rib 221 and the outer wall of the breathing tube 2. For example, a portion of the heater 222 is embedded in the outer wall of the breathing tube 2, while another portion is embedded in the bottom 225 of the rib 221, thereby ensuring that the bottom 225 of the rib 221 is completely in contact with the outer wall of the breathing tube 2.

[0054] Therefore, it can be understood that structures capable of accommodating a portion of the heating body 222, such as grooves, can be respectively provided on the bottom 225 of the rib 221 and the outer wall of the breathing tube 2.

[0055] The rib 221 is provided with a first recessed portion 201 at the bottom 225 near the outer wall of the breathing tube 2. The first recessed portion 201 dissipates heat by convection. In this embodiment, the majority of heat transferred from the heating element 222 to the rib 221 is dissipated through the gap formed by the first recessed portion 201, allowing the heat in the rib 221 to rapidly exchange heat with the air within the gap, thereby releasing the heat more quickly. A first support portion 251 is provided between the first recessed portion 201 and the sidewall of the rib 221. The first support portion 251 is connected to the bottom 225 and top 224 of the rib 221, respectively. In other words, the entire solid portion of the rib 221 other than the first recessed portion 201 constitutes the first support portion 251. Because the first support portion 251 is a solid portion, the remaining heat in the rib 221 after the heat is dissipated by the first recessed portion 201 is dissipated by heat conduction through the first support portion 251.

[0056] Since the first recess 201 blocks the path of heat conduction from the heating body 222 to the top 224 of the rib 221, the heat is dissipated at the first recess 201 by heat convection with faster heat dissipation, that is, the heat dissipation speed at the first recess 201 is faster and the heat dissipation speed at the top 224 is slower.

[0057] Furthermore, because the first recessed portion 201 is recessed inward, it does not come into contact with human skin during use. However, the top portion 224 of the rib 221 is convex relative to the first recessed portion 201, and thus can come into contact with human skin. However, due to the presence of the first recessed portion 201, most heat is quickly dissipated from the first recessed portion 201. Therefore, the top portion 224 of the rib 221 does not reach excessive temperatures, and even if it does come into contact with human skin, it will not cause discomfort or low-temperature burns to the patient.

[0058] like Figure 4a As shown, at least a portion of the inner surface of the first recessed portion 201 extends into the interior of the rib 221. To achieve better heat dissipation, the first recessed portion 201 can be located above the heating element 222; more specifically, it is located directly above the heating element 222 to achieve an ideal heat exchange path. That is, as much heat as possible is dissipated from the first recessed portion 201, while the remaining heat is physically conducted along the first support portion 251 to the top 224 to the outer surface of the rib 221. As a result, more heat is dissipated from the first recessed portion 201, while less heat is dissipated from the top 224.

[0059] exist Figure 4a In the embodiment shown, the number of the first recessed portion 201 is one. Figure 4aAs shown, the first recessed portion 201 extends generally in a straight line, so the two opposing inner walls 201a and 201b of the first recessed portion 201 are generally planar. At the inner bottom wall 201c of the first recessed portion 201, the two opposing inner walls 201a and 201b are connected by a curved inner bottom wall 201c. Simultaneously, the inner bottom wall 201c is spaced a certain distance from the outer surface of the rib 221, so that the first recessed portion 201 (specifically, its inner bottom wall 201c) and the sidewalls of the rib 221 form a first support portion 251. One function of the first support portion 251 is to support the top portion 224, and another function is to conduct heat from the heating element 222 to the top portion 224 for dissipation. Therefore, although the first support portion 251 still conducts heat from the heating element 222 to the outside of the rib 221, such as the top portion 224. However, the amount of heat dissipated through conduction along the first support portion 251 is significantly reduced compared to the amount of heat dissipated through convection at the first recessed portion 201. In other words, by providing the first recessed portion 201 on the rib 221, the original heat conduction path of the heating element 222 is cut off, allowing most of the heat to be dissipated through faster convection at the first recessed portion 201, while only a small amount of heat is dissipated through conduction at the first support portion 251. Therefore, the temperature rise on the outside of the rib 221, such as at the top portion 224, is not significant. Even in the event of undesirable prolonged contact with the patient's skin, the patient will not feel uncomfortable or suffer burns, thereby improving user comfort and safety.

[0060] Furthermore, by providing the first recessed portion 201, the ribs 221 have more flexibility between the top 224 and the bottom 225 on both sides of the first recessed portion 201. The two can be closer to each other or farther away from each other through the first recessed portion 201, thereby making the ribs 221 and the breathing tube 2 more soft and flexible, which can bring patients a more comfortable and convenient experience.

[0061] Although Figure 4a A specific implementation of the first recessed portion 201 is shown in FIG. Figure 4a The first recessed portion 201 shown is only used to schematically illustrate one structural form of the first recessed portion 201. Therefore, it can be understood that the first recessed portion 201 is not limited to Figure 4a For example, the two opposite inner walls 201a, 201b and the inner bottom wall 201c of the first recessed portion 201 may also be inclined surfaces, curved surfaces or special-shaped surfaces. Or the two opposite inner walls 201a, 201b and the inner bottom wall 201c of the first recessed portion 201 may also be one or a combination of the above-mentioned various inner surface structures. For another example, the two opposite inner walls 201a, 201b of the first recessed portion 201 are not in accordance with Figure 4aThe two are shown extending in substantially the same direction, but may extend in different directions.

[0062] It is understandable that there may be more than one first recessed portion 201. In an optional embodiment, Figure 4b As shown, the plurality of first recessed portions 201 may be distributed sequentially from the bottom 225 to the top 224 , for example.

[0063] Preferably, the thermal conductivity of the outer surface of the rib 221 above the first recessed portion 201 is lower than the thermal conductivity of the rest of the rib 221. For example, the thermal conductivity at the top 224 is lower than that at the bottom 225. This further increases the resistance to heat conduction above the first recessed portion 201 (e.g., the top 224), thereby limiting the maximum temperature that can be reached at the top 224 and ensuring patient comfort and safety.

[0064] Example 2

[0065] Please combine Figure 2 、 Figure 3 、 Figure 5a 、 Figure 5b and Figure 6 Based on the above embodiment 1, the present invention provides a modified embodiment. In this embodiment, the differences from the above embodiment 1 will be described in detail, and the similarities will be briefly described or not described again.

[0066] In this embodiment, the covering member includes a rib 221 arranged on the outer wall of the breathing tube 2, and the rib 221 is respectively provided with a first recessed portion 202 and a second recessed portion 204 at the bottom 225 near the outer wall of the breathing tube 2. The first recessed portion 202 and the second recessed portion 204 respectively dissipate heat by heat convection.

[0067] Similar to the first embodiment described above, since the first and second recesses 202, 204 are both recessed inward, they do not come into contact with human skin when the breathing tube 2 is in use. However, the top 224 of the rib 221 is convex relative to the first and second recesses 202, 204, and thus can come into contact with human skin. However, due to the presence of the first and second recesses 202, 204, most of the heat is quickly dissipated from the first and second recesses 202, 204. Therefore, the temperature of the top 224 of the rib 221 will not be excessively high. Therefore, even if it comes into contact with human skin, it will not cause discomfort or low-temperature burns to the patient.

[0068] like Figure 5aAs shown, the first recessed portion 202 and the second recessed portion 204 extend toward each other. In this embodiment, the first recessed portion 202 can employ a similar structure to the first recessed portion 201 in the aforementioned embodiment 1. For example, the first recessed portion 202 can also have two substantially planar opposing inner walls extending axially along the breathing tube 2, and a curved inner bottom wall connecting the two inner walls. The second recessed portion 204 can also employ the same structure as the first recessed portion 202.

[0069] In addition, the first recessed portion 202 and the second recessed portion 204 may also adopt other structural forms described in the above embodiment 1.

[0070] Therefore, it can be understood that, similar to the above-mentioned embodiment 1, the number of the first recessed portion 202 and the number of the second recessed portion 204 are both one or more, and the number of the first recessed portion 202 and the second recessed portion 204 can be the same or different.

[0071] exist Figure 5a In the embodiment shown, the first recessed portion 202 and the second recessed portion 204 are symmetrically arranged with respect to the radial direction of the breathing tube 2. Figure 5a As shown, the first recessed portion 202 and the second recessed portion 204 extend toward each other, but are not connected. Therefore, the portion between the first recessed portion 202 and the second recessed portion 204 constitutes the second support portion 252. The second support portion 252 is connected to the bottom 225 and the top 224 of the rib 221, respectively. In other words, the entire solid portion of the rib 221, excluding the first recessed portion 202 and the second recessed portion 204, constitutes the second support portion 252. Because the second support portion 252 is a solid portion, it dissipates heat through heat conduction.

[0072] In order to obtain a better heat dissipation effect, the heating body 222 is located between the bottom 225 of the rib 221 and the outer wall of the breathing tube 2, and the heating body 222 is located between the two, closer to the first recessed portion 202 and / or the second recessed portion 204, and farther away from the second supporting portion 252. More specifically, as Figure 5a As shown, the first recessed portion 202 is located above (directly above) the corresponding heating element 222, and the second recessed portion 204 is located above (directly above) the corresponding heating element 222. Therefore, the first recessed portion 202 and the second recessed portion 204 cut off the original heat conduction path of the heating element 222, allowing most of the heat to be dissipated through the first recessed portion 202 and the second recessed portion 204 via faster heat convection, while only a small amount of heat is dissipated through the second support portion 252 through conduction. Figure 6The dashed lines in the figure illustrate the heat convection at the first recessed portion 202 and the second recessed portion 204. Therefore, the temperature on the outside of the rib 221, such as at the top portion 224, does not rise significantly. Even in the event of undesirable, prolonged contact with the patient's skin, it will not cause discomfort or burns. In other embodiments, the first recessed portion 202 or the second recessed portion 204 can be positioned directly above the corresponding heating element 222.

[0073] In addition, similar to the above-mentioned embodiment 1, the thermal conductivity of the outer surface of the rib 221 above the first recessed portion 202 and the second recessed portion 204 is lower than the thermal conductivity of the rest of the rib 221. Figure 6 The thermal conductivity of the outer surface of the roughly semicircular top 224 shown is lower than the thermal conductivity of the outer surface of other parts of the rib 221, thereby further increasing the resistance to heat conduction to the top of the first recess 202 and the second recess 204 (for example, the top 224), thereby limiting the maximum temperature that the top 224 of the rib 221 can reach.

[0074] It is understandable that the first recessed portion 202 and the second recessed portion 204 may also be arranged asymmetrically, for example, the first recessed portion 202 is closer to the bottom 225 of the rib 221, and the second recessed portion 204 is closer to the top 224 of the rib 221. Figure 5b shown.

[0075] Example 3

[0076] Please combine Figure 2 、 Figure 3 and Figure 7 Based on the above embodiments 1 and 2, the present invention provides a modified embodiment. In this embodiment, the differences from the above embodiments 1 and 2 will be emphasized, and the similarities will be briefly described or not described again.

[0077] In this embodiment, the rib 221 is provided with a first recessed portion 203 and a second recessed portion 205 at the bottom 225 close to the outer wall of the breathing tube 2 , respectively. The first recessed portion 203 and the second recessed portion 205 dissipate heat by heat convection.

[0078] Similar to the second embodiment, the first and second recesses 203, 205 can be arranged symmetrically about the radial direction of the breathing tube 2. Furthermore, the first and second recesses 203, 205 not only extend toward each other but also toward the top 224. This results in a special-shaped first and second recesses 203, 205. In other implementations of this embodiment, the special-shaped first and second recesses can also be arranged to extend toward each other but not be radially symmetrical.

[0079] Taking the first recessed portion 203 as an example, the first recessed portion 203 comprises a first inner wall 203a extending generally along the outer contour of the top portion 224, a second inner wall 203b extending generally in a plane from the top portion 224 to the bottom portion 225, and a third inner wall 203c extending generally in a plane along the axial direction of the breathing tube 2. The first inner wall 203a, second inner wall 203b, and third inner wall 203c are connected in sequence by rounded corners for smooth transitions. This creates a larger cavity volume within the first recessed portion 203, thereby facilitating greater heat dissipation through convection.

[0080] The first recess 203 and the second recess 205 do not connect through each other, but instead form a second support portion 253, which is connected to the bottom 225 and top 224 of the rib 221, respectively. In other words, the entire solid portion of the rib 221, excluding the first recess 203 and the second recess 205, constitutes the second support portion 253. Because the second support portion 253 is a solid part, it dissipates heat through heat conduction.

[0081] Similar to the first embodiment described above, the heater 222 is positioned between the bottom end of the rib 221 and the outer wall of the breathing tube 2, with another portion of the heater 222 embedded in the bottom 225 of the rib 221. The heater 222 is positioned close to the first and second recesses 203, 205, and away from the second support portion 253. For example, the first and second recesses 203, 205 can be positioned above their respective heaters 222 to increase resistance to heat transfer to the second support portion 253.

[0082] exist Figure 7 In the illustrated structure of the first recessed portion 203 and the second recessed portion 205, two sides of the top portion 224 extend downwardly from the locations corresponding to the first recessed portion 203 and the second recessed portion 205 to form a first hook portion 261 and a second hook portion 262. The first hook portion 261 and the second hook portion 262 bend toward the interior of the first recessed portion 203 and the second recessed portion 205, respectively. The first hook portion 261 and the second hook portion 262 can provide a certain degree of support and also act as a barrier to the first recessed portion 203 and the second recessed portion 205, thereby preventing other objects from entering the first recessed portion 203 and the second recessed portion 205.

[0083] On the basis of the above embodiments 1-3, the rib 221 can be constructed as a spiral rib extending in a spiral direction along the axial direction of the breathing tube 2 to ensure that the breathing tube 2 has a sufficient and reasonable spiral rib heat dissipation effect. Figure 3 Alternatively, the spiral ribs may extend discontinuously in the axial direction of the breathing tube 2. It should be noted that if the ribs 221 are discontinuous in the axial direction of the breathing tube 2, then the corresponding heating body 222 may also be provided in a discontinuous form.

[0084] Optionally, the rib 221 may also be configured as a straight rib extending along the axial direction of the breathing tube 2. There may be multiple straight ribs, and the multiple straight ribs may be sequentially arranged along the circumference of the breathing tube 2.

[0085] Optionally, the rib 221 may also be configured as an annular rib capable of covering at least a portion of the outer wall of the breathing tube 2. There may be multiple annular ribs, which may be sequentially arranged along the axial direction of the breathing tube 2.

[0086] Optionally, the rib 221 may also be constructed as a combination of several of the above structures.

[0087] In the above-mentioned embodiments 1-3, the depth to which the first recessed portions 201, 202, 203 and the second recessed portions 204, 205 extend into the interior of the rib 221 is determined by the position of the corresponding heating body 222, so that the first recessed portions 201, 202, 203 and the second recessed portions 204, 205 are located above the corresponding heating body 222; and in order to improve the heat dissipation effect of the first recessed portions 201, 202, 203 and the second recessed portions 204, 205, the first recessed portions 201, 202, 203 and the second recessed portions 204, 205 extend into the interior (radially) of the rib 221 while also extending along the axial direction of the rib 221 to obtain a larger heat exchange gap (i.e., heat exchange space), thereby achieving a better heat dissipation effect.

[0088] In addition, if Figure 4a As shown, the heating assembly 22 further includes a signal line 223 embedded in the outer wall of the breathing tube 2. The signal line 223 can detect the temperature of the breathing tube 2 and feed the temperature back to the outside to adjust the heating element 222 so that the temperature of the breathing tube 2 is adjusted to a suitable temperature.

[0089] In addition, the breathing tube 2 is formed by a tubular film 21, and the inner wall of the tubular film 21 forms a ventilation airway for conveying airflow. Therefore, the breathing tube 2 formed by the tubular film 21 is light and soft, so as not to affect the patient's movement and convenience of use.

[0090] In addition, if Figure 1 As shown, both ends of the breathing tube 2 are connected to a first connector 1 for connecting to a ventilator and a second connector 3 for connecting to a breathing mask. Both the first connector 1 and the second connector 3 can adopt the form of existing connectors, which will not be described in detail here.

[0091] According to a second aspect of the present invention, a breathing device is provided, which includes the above-mentioned airflow delivery device, and also includes a ventilator and a breathing mask, wherein the airflow delivery device is connected to the ventilator and the breathing mask through a first connector 1 and a second connector 3, respectively, the ventilator is used to generate a breathing airflow, and the breathing mask is used to be worn on the patient's face to introduce airflow into the patient's mouth and nose.

[0092] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. An air flow conveying device, characterized in that: The breathing tube includes a heating assembly provided on the breathing tube, the heating assembly including a heating body and a covering member provided outside the heating body, the heating body being used to heat and maintain the temperature of the airflow in the breathing tube; The covering member is configured such that the heat dissipation at a portion close to the heating element is greater than the heat dissipation at a portion far from the heating element. The covering member includes a rib provided on the outer wall of the breathing tube, and the heating body is provided between the bottom of the rib and the outer wall of the breathing tube; The rib is provided with at least one first recessed portion recessed inwardly from the surface of the rib near the bottom of the outer wall of the breathing tube, the first recessed portion dissipating heat by convection, and the remaining heat on the rib after the heat is dissipated by the first recessed portion is dissipated by heat conduction through the solid portion of the rib; The thermal conductivity of the surface at the top of the rib above the first recessed portion is lower than the thermal conductivity of the surface of the remaining portion of the rib.

2. The air flow conveying device according to claim 1, characterized in that: The first recessed portion is disposed at a position above the corresponding heating body.

3. The air flow conveying device according to claim 1, characterized in that: The rib is further provided with at least one second recessed portion recessed inwardly from the surface of the rib at the bottom near the outer wall of the breathing tube; The first recessed portion and the second recessed portion extend toward each other.

4. The air flow conveying device according to claim 3, characterized in that: The first recessed portion and the second recessed portion are symmetrically arranged with respect to a radial direction of the breathing tube.

5. The air flow conveying device according to claim 1, characterized in that: The inner surface of the first recessed portion is configured as a combination of one or more of a curved surface, a flat surface and an inclined surface.

6. The air flow conveying device according to claim 3, characterized in that: The inner surface of the second recessed portion is configured as a combination of one or more of a curved surface, a flat surface and an inclined surface.

7. The air flow conveying device according to claim 1, characterized in that: The thermal conductivity of the surface at the top of the rib is lower than the thermal conductivity of the surface of the remaining portion of the rib.

8. The air flow conveying device according to claim 3, characterized in that: The thermal conductivity of the surface at the top of the rib above the first and second recessed portions is lower than the thermal conductivity of the surface of the remaining portion of the rib.

9. The air flow conveying device according to any one of claims 1 to 8, characterized in that: The rib structure is one or more of the following combinations: a spiral rib extending spirally along the axial direction of the breathing tube; a straight rib extending along the axial direction of the breathing tube; The annular rib can cover at least a portion of the outer wall of the breathing tube.

10. The air flow conveying device according to claim 3, characterized in that: A second supporting portion is provided between the first recessed portion and the second recessed portion. The second supporting portion is connected to the bottom of the rib and the top of the rib respectively. The second supporting portion dissipates heat by heat conduction.

11. The air flow conveying device according to claim 10, characterized in that: The heating body is located between the bottom end of the rib and the outer wall of the breathing tube, close to the first recessed portion and / or the second recessed portion, and away from the second supporting portion.

12. The air flow conveying device according to claim 11, characterized in that: The first recessed portion and / or the second recessed portion are respectively located above the corresponding heating body.

13. The air flow conveying device according to claim 9, characterized in that: The heating body is configured as a heating wire extending in the extending direction of the rib.

14. The air flow conveying device according to claim 1, characterized in that: The heating assembly further includes a signal line embedded in the outer wall of the breathing tube.

15. The air flow conveying device according to claim 1, characterized in that: The breathing tube is formed of a tubular film, the inner wall of which forms a ventilation airway for conveying airflow.

16. The air flow conveying device according to claim 1, characterized in that: Both ends of the breathing tube are respectively connected with a first connector for connecting to a ventilator and a second connector for connecting to a breathing mask.

17. A breathing apparatus comprising the air flow delivery device according to any one of claims 1 to 16, characterized in that: It also includes a respirator and a breathing mask, and the airflow delivery device is connected to the respirator and the breathing mask respectively.

Images