Breathing tube

Abstract

The utility model relates to a breathing tube. Comprising an air guide assembly which is provided with an air guide cavity and can generate heat; the joint is connected with the end part of the air guide assembly; the heat preservation film is arranged on the air guide assembly in a sleeving manner; and the mounting assembly is arranged outside the heat preservation film in a sleeving manner so as to fix the heat preservation film. And the heat preservation film is arranged, and the heat preservation film has good heat insulation and heat preservation performance, so that heat exchange between the gas guide assembly and the outside is effectively prevented, and the phenomenon that gas in the gas guide cavity is condensed due to temperature difference is avoided. Therefore, on one hand, the volume of the air guide cavity can be kept constant, it is ensured that air has enough flow speed and flow in the air guide cavity, and then the ventilation performance of the breathing tube is improved. Meanwhile, the bacterium proliferation environment is eliminated, pulmonary infection to a patient is avoided, and therefore the safety of the breathing tube is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a breathing tube. Background Art

[0002] The breathing tube can heat and insulate the flowing gas in its lumen. However, for a traditional breathing tube, a large amount of condensed water will exist on the inner wall surface of the lumen, which will affect the ventilation effect of the breathing tube on the one hand, and also affect the safety of the use of the exhalation tube on the other hand. Summary of the invention

[0003] A technical problem solved by the present application is how to improve the safety and ventilation of the breathing tube.

[0004] A breathing tube, comprising:

[0005] An air guide component, the air guide component having an air guide cavity and capable of generating heat;

[0006] A connector connected to an end of the gas guide assembly;

[0007] A thermal insulation film, wherein the thermal insulation film is sleeved on the air guide component; and

[0008] An installation component is sleeved outside the thermal insulation film to fix the thermal insulation film.

[0009] In one embodiment, the air guide assembly includes an air guide tube and a heating element, the air guide tube forms the air guide cavity, the heating element is arranged on the outer wall surface of the air guide tube, and the thermal insulation film covers the heating element and the air guide tube.

[0010] In one of the embodiments, the air guide assembly further includes a reinforcing rib, the reinforcing rib is spirally wound around the outer wall surface of the air guide tube, and the heating element is located on the reinforcing rib.

[0011] In one embodiment, the mounting component abuts against the joint along the axial direction of the breathing tube, and an mounting gap is formed between the mounting component and the joint or the air guide component; or an mounting gap is formed in the mounting component; and the end of the thermal insulation film is fixed in the mounting gap.

[0012] In one embodiment, the mounting assembly includes an outer mounting sleeve, which is mounted on the joint, and the mounting gap is formed between the outer mounting sleeve and the joint. The outer mounting sleeve includes a first protrusion located in the mounting gap, and the first protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap. The joint includes a limiting protrusion located in the mounting gap, and the limiting protrusion is protrudingly arranged on the outer wall surface of the joint for defining the boundary of the mounting gap. The first protrusion and the limiting protrusion are spaced apart along the axial direction of the breathing tube and are respectively pressed against opposite sides of the thermal insulation film.

[0013] In one embodiment, the outer mounting sleeve also includes a second protrusion located in the mounting gap and spaced apart from the first protrusion, the second protrusion protruding from the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap, the limiting protrusion is located between the first protrusion and the second protrusion, the first protrusion and the second protrusion are simultaneously pressed against the outer side of the thermal insulation film, and the limiting protrusion is pressed against the inner side of the thermal insulation film.

[0014] In one embodiment, the mounting assembly includes an outer mounting sleeve, which is mounted on the joint, and the mounting gap is formed between the outer mounting sleeve and the joint. The outer mounting sleeve includes a first protrusion located in the mounting gap, and the first protrusion is protruding from the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap. The outer wall surface of the joint for defining the boundary of the mounting gap is recessed to form a groove, and the first protrusion cooperates with the groove to press the thermal insulation film located in the groove.

[0015] In one embodiment, the mounting assembly includes an outer mounting sleeve, the joint sleeve is arranged outside the outer mounting sleeve, the outer mounting sleeve is arranged on the air guide assembly and forms the mounting gap between the outer mounting sleeve and the air guide assembly, and the thermal insulation film is connected to the outer mounting sleeve and the air guide assembly by injection molding.

[0016] In one embodiment, the air guide component includes an air guide pipe and reinforcement ribs, the reinforcement ribs are spirally wound on the outer wall surface of the air guide pipe, the mounting component includes an outer mounting sleeve, the joint sleeve is arranged outside the outer mounting sleeve, the outer mounting sleeve is sleeved on the air guide component and forms the mounting gap with the air guide component, the outer mounting sleeve includes a first protrusion located in the mounting gap, the first protrusion is protruding on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap, a limiting groove is formed between two adjacent circles of the reinforcement ribs, the first protrusion cooperates with the limiting groove to press the thermal insulation film located in the limiting groove.

[0017] In one embodiment, the mounting assembly includes an outer mounting sleeve and an inner mounting sleeve, the inner mounting sleeve is sleeved on the air guide assembly, and the outer mounting sleeve is sleeved on the inner mounting sleeve and the joint at the same time, and the mounting gap is formed between the outer mounting sleeve and the inner mounting sleeve; the outer mounting sleeve includes a first protrusion and a second protrusion arranged at intervals, the first protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap, the second protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve outside the mounting gap, the inner mounting sleeve includes a third protrusion, the third protrusion is protrudingly arranged on the outer wall surface of the inner mounting sleeve for defining the boundary of the mounting gap, the first protrusion and the third protrusion are arranged at intervals and respectively press against opposite sides of the thermal insulation film, a recessed groove is opened on the joint, and the second protrusion cooperates with the recessed groove.

[0018] A technical effect of an embodiment of the present application is: by providing a thermal insulation film, the thermal insulation film has good heat insulation and heat preservation properties, thereby effectively preventing the air guide component from exchanging heat with the outside world, thereby avoiding condensation of the gas in the air guide cavity due to temperature difference. In this way, on the one hand, the volume of the air guide cavity can be kept constant, ensuring that the gas has sufficient flow rate and flow in the air guide cavity, thereby improving the ventilation of the breathing tube. At the same time, it also eliminates the environment for bacterial proliferation, avoids lung infection in patients, and thus improves the safety of the breathing tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the planar structure of a breathing tube provided in one embodiment.

[0020] Figure 2 The present invention is a schematic diagram of a planar cross-sectional structure of a breathing tube provided in one embodiment.

[0021] Figure 3 A schematic diagram of a partial planar cross-sectional structure of a breathing tube provided in one embodiment.

[0022] Figure 4 The present invention is a schematic diagram of a planar cross-sectional structure of a breathing tube provided in one embodiment.

[0023] Figure 5 The present invention is a schematic diagram of a planar cross-sectional structure of a breathing tube provided in one embodiment.

[0024] Figure 6 The present invention is a schematic diagram of a planar cross-sectional structure of a breathing tube provided in one embodiment.

[0025] Figure 7 The present invention is a schematic diagram of a planar cross-sectional structure of a breathing tube provided in one embodiment. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0028] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0032] See also Figure 1 and Figure 2 In one embodiment of the present application, a breathing tube 10 includes an air guide component 100, a joint 200, a heat preservation film 300, and a mounting component 400. The air guide component 100 has an air guide cavity 111 and can generate heat. The air guide cavity 111 is used to circulate gas. The joint 200 is arranged at the end of the air guide component 100. For example, the joint 200 is sleeved on the end of the air guide component 100. The joint 200 and the air guide component 100 can be integrally connected by injection molding. The heat preservation film 300 is sleeved on the air guide component 100. The mounting component 400 is sleeved outside the heat preservation film 300 to fix the heat preservation film 300.

[0033] See also Figure 1 , Figure 2 and Figure 3In some embodiments, the air guide component 100 includes an air guide tube 110 and a heating element 120. The air guide tube 110 forms an air guide cavity 111. The heating element 120 is disposed on the outer wall of the air guide tube 110. The heating element 120 can generate heat. When the heating element 120 generates heat, the heat generated by the heating element 120 will be transferred to the air guide tube 110. The gas in the air guide cavity 111 will absorb the heat transferred to the air guide tube 110 and heat up. Of course, the air guide component 100 may also include a reinforcing rib 130. The reinforcing rib 130 is spirally wound on the outer wall of the air guide tube 110, and the heating element 120 is located in the reinforcing rib 130, that is, the heating element 120 is hidden in the reinforcing rib 130. The reinforcing rib 130 can not only enhance the structural strength of the air guide component 100, but also protect the heating element 120.

[0034] If the mode of setting the heating element 120 on the inner wall surface of the air guide tube 110 is adopted, since the gas absorbed by the user will contact the heating element 120, in order to ensure safety, the heating element 120 will have higher biological and chemical performance requirements, resulting in higher costs. However, for the breathing tube 10 in the above implementation, since the heating element 120 is set on the outer wall surface of the air guide tube 110, it can effectively prevent the heating element 120 from contacting the gas absorbed by the user, thereby reducing the biological and chemical performance requirements of the heating element 120, and then reducing the manufacturing cost of the air guide assembly 100 and the entire breathing tube 10.

[0035] See also Figure 1 , Figure 2 and Figure 3 , the mounting assembly 400 is in contact with the joint 200 along the axial direction of the breathing tube 10, so that the mounting assembly 400 can be positioned along the axial direction of the breathing tube 10, thereby improving the installation accuracy and efficiency of the mounting assembly 400. A mounting gap 430 can be formed between the mounting assembly 400 and the joint 200, or a mounting gap 430 can be formed between the mounting assembly 400 and the air guide assembly 100; or a mounting gap 430 can be formed in the mounting assembly 400. The mounting gap 430 can be annular, so that the mounting gap 430 is arranged around the air guide assembly 100, and the thermal insulation film 300 can be a tubular structure. The thermal insulation film 300 can be set outside the entire air guide assembly 100, and the end of the thermal insulation film 300 extends into the mounting gap 430, so that the end of the thermal insulation film 300 is fixed in the mounting gap 430.

[0036] See also Figure 2In some embodiments, the mounting assembly 400 includes an outer mounting sleeve 410, which is sleeved on the connector 200, and a mounting gap 430 is formed between the outer mounting sleeve 410 and the connector 200. The outer mounting sleeve 410 includes a first protrusion 411, which is located in the mounting gap 430, and the first protrusion 411 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 for defining the boundary of the mounting gap 430. The connector 200 includes a limiting protrusion 210, which is located in the mounting gap 430, and the limiting protrusion 210 is protrudingly arranged on the outer wall surface of the connector 200 for defining the boundary of the mounting gap 430. The first protrusion 411 and the limiting protrusion 210 are arranged at intervals along the axial direction of the breathing tube 10, and the sum of the protruding heights of the first protrusion 411 and the limiting protrusion 210 is greater than the width of the installation gap 430, so that the first protrusion 411 and the limiting protrusion 210 can form a sawtooth-like bite relationship. When the thermal insulation film 300 is located in the installation gap 430, the first protrusion 411 applies a pressing force to the outer surface of the thermal insulation film 300, and the limiting protrusion 210 applies a pressing force to the inner surface of the thermal insulation film 300, so that the first protrusion 411 and the limiting protrusion 210 are respectively pressed against the opposite sides of the thermal insulation film 300, and then the thermal insulation film 300 is bent and bitten between the first protrusion 411 and the limiting protrusion 210, thereby fixing the thermal insulation film 300 and improving the connection force of the thermal insulation film 300, preventing the thermal insulation film 300 from slipping relative to the air guide component 100 along the axial direction of the breathing tube 10.

[0037] See also Figure 3In some embodiments, the mounting assembly 400 includes an outer mounting sleeve 410, which is sleeved on the connector 200, and a mounting gap 430 is formed between the outer mounting sleeve 410 and the connector 200. The outer mounting sleeve 410 includes a first protrusion 411 and a second protrusion 412, wherein the first protrusion 411 is located in the mounting gap 430, and the first protrusion 411 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 for defining the boundary of the mounting gap 430; the second protrusion 412 is located in the mounting gap 430, and the second protrusion 412 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 for defining the boundary of the mounting gap 430, and the first protrusion 411 and the second protrusion 412 located in the mounting gap 430 are spaced apart along the axial direction of the breathing tube 10. The connector 200 includes a limiting protrusion 210, which is located in the installation gap 430. The limiting protrusion 210 is protrudingly arranged on the outer wall surface of the connector 200 for defining the boundary of the installation gap 430. The first protrusion 411, the second protrusion 412 and the limiting protrusion 210 are all arranged at intervals along the axial direction of the breathing tube 10. The limiting protrusion 210 is located between the first protrusion 411 and the second protrusion 412, so that the first protrusion 411 and the second protrusion 412 can form a sawtooth-like bite relationship with the limiting protrusion 210. When the thermal insulation film 300 is located in the installation gap 430, the first protrusion 411 and the second protrusion 412 apply a pressing force to the outer surface of the thermal insulation film 300, and the limiting protrusion 210 applies a pressing force to the inner surface of the thermal insulation film 300, so that the first protrusion 411 and the second protrusion 412 and the limiting protrusion 210 respectively press against the opposite sides of the thermal insulation film 300, and then the thermal insulation film 300 is bent and bitten between the first protrusion 411, the second protrusion 412 and the limiting protrusion 210, thereby fixing the thermal insulation film 300 and further improving the connection force of the thermal insulation film 300, preventing the thermal insulation film 300 from slipping relative to the air guide component 100 along the axial direction of the breathing tube 10.

[0038] See also Figure 4In some embodiments, the mounting assembly 400 includes an outer mounting sleeve 410, which is sleeved on the connector 200, and a mounting gap 430 is formed between the outer mounting sleeve 410 and the connector 200. The outer mounting sleeve 410 includes a first protrusion 411, which is located in the mounting gap 430. The first protrusion 411 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 for defining the boundary of the mounting gap 430. The joint 200 is used to define the boundary of the installation gap 430, and a groove 220 is formed on the outer wall surface thereof. The first protrusion 411 cooperates with the groove 220 so that the first protrusion 411 abuts against the thermal insulation film 300 located in the groove 220, that is, the thermal insulation film 300 is pressed between the bottom wall surface of the groove 220 and the first protrusion 411. This can also be understood as the first protrusion 411 and the groove 220 forming a bite relationship, thereby fixing the thermal insulation film 300 and preventing the thermal insulation film 300 from slipping relative to the air guide assembly 100 along the axial direction of the breathing tube 10.

[0039] See also Figure 5 In some embodiments, the mounting assembly 400 includes an outer mounting sleeve 410, the joint 200 is sleeved outside the outer mounting sleeve 410, and the outer mounting sleeve 410 is sleeved on the air guide assembly 100, so that a mounting gap 430 is formed between the outer mounting sleeve 410 and the air guide assembly 100. The thermal insulation film 300 is connected to the outer mounting sleeve 410 and the air guide assembly 100 by injection molding. For example, the thermal insulation film 300, the outer mounting sleeve 410 and the air guide assembly 100 can all be molded by an injection molding process, so that the thermal insulation film 300 is integrally connected to the outer mounting sleeve 410 and the air guide assembly 100. This can also play a role in fixing the thermal insulation film 300 and preventing the thermal insulation film 300 from slipping relative to the air guide assembly 100 along the axial direction of the breathing tube 10.

[0040] See also Figure 6In some embodiments, the mounting assembly 400 includes an outer mounting sleeve 410, the joint 200 is sleeved outside the outer mounting sleeve 410, and the outer mounting sleeve 410 is sleeved on the air guide assembly 100, so that a mounting gap 430 is formed between the outer mounting sleeve 410 and the air guide assembly 100. The outer mounting sleeve 410 includes a first protrusion 411, the first protrusion 411 is located in the mounting gap 430, and the first protrusion 411 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 for defining the boundary of the mounting gap 430. For the air guide component 100, a limiting groove 131 is formed between two adjacent circles of reinforcing ribs 130, and the first protrusion 411 cooperates with the limiting groove 131, so that the first protrusion 411 abuts against the thermal insulation film 300 located in the limiting groove 131, that is, the thermal insulation film 300 is pressed between the bottom wall surface of the limiting groove 131 and the first protrusion 411. This can also be understood as the first protrusion 411 and the limiting groove 131 forming a bite relationship, thereby playing a role in fixing the thermal insulation film 300 and preventing the thermal insulation film 300 from slipping relative to the air guide component 100 along the axial direction of the breathing tube 10. In this way, the limiting groove 131 structure formed by the existing reinforcing ribs 130 can be fully utilized, thereby simplifying the structure of the breathing tube 10 and reducing the manufacturing cost.

[0041] See also Figure 7 In some embodiments, the mounting assembly 400 includes an outer mounting sleeve 410 and an inner mounting sleeve 420, the inner mounting sleeve 420 is sleeved on the air guide assembly 100, and the outer mounting sleeve 410 is sleeved on the inner mounting sleeve 420 and the joint 200 at the same time, and a mounting gap 430 is formed between the outer mounting sleeve 410 and the inner mounting sleeve 420; the outer mounting sleeve 410 includes a first protrusion 411 and a second protrusion 412, the first protrusion 411 and the second protrusion 412 are arranged at intervals along the axial direction of the breathing tube 10, the first protrusion 411 is located in the mounting gap 430, and the first protrusion 411 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 for defining the boundary of the mounting gap 430. The second protrusion 412 is located outside the mounting gap 430, so that the second protrusion 412 is protrudingly arranged on the inner wall surface of the outer mounting sleeve 410 outside the mounting gap 430. The inner mounting sleeve 420 includes a third protrusion 421, which is located in the mounting gap 430. The third protrusion 421 is protrudingly arranged on the outer wall surface of the inner mounting sleeve 420 for defining the boundary of the mounting gap 430. The first protrusion 411, the second protrusion 412 and the third protrusion 421 are arranged at intervals along the axial direction of the breathing tube 10, so that the third protrusion 421 is located between the first protrusion 411 and the second protrusion 412.

[0042] The connector 200 is provided with a groove 230, which is formed by a certain depth of depression of the outer wall surface of the connector 200. The second protrusion 412 cooperates with the groove 230, so that the positioning and connection between the outer mounting sleeve 410 and the connector 200 can be achieved. At the same time, the first protrusion 411 and the third protrusion 421 can form a sawtooth-like bite relationship. When the thermal insulation film 300 is located in the installation gap 430, the first protrusion 411 applies a pressure to the outer surface of the thermal insulation film 300, and the third protrusion 421 applies a pressure to the inner surface of the thermal insulation film 300, so that the first protrusion 411 and the third protrusion 421 are pressed against the opposite sides of the thermal insulation film 300 respectively, and then the thermal insulation film 300 is bent and bitten between the first protrusion 411 and the third protrusion 421, so as to fix the thermal insulation film 300 to prevent the thermal insulation film 300 from slipping relative to the air guide component 100 along the axial direction of the breathing tube 10.

[0043] If the heat preservation film 300 is not used, when the room temperature is low, the air guide component 100 generates heat exchange with the outside world, causing the gas in the air guide cavity 111 to condense due to the temperature difference. In this way, on the one hand, the liquid adhering to the inner wall of the air guide cavity 111 affects the volume of the air guide cavity 111, and also increases the flow resistance of the gas, thereby reducing the flow rate and flow of the gas in the air guide cavity 111, and further weakening the ventilation of the breathing tube 10. At the same time, the droplets create favorable conditions for the proliferation of bacteria, which in turn cause lung infection in the patient, thereby affecting the safety of the breathing tube 10.

[0044] As for the exhalation tube in the above embodiment, by providing the heat-insulating film 300, the heat-insulating film 300 has good heat-insulating and heat-preserving properties, thereby effectively preventing the air guide component 100 from exchanging heat with the outside world, thereby avoiding the condensation of the gas in the air guide cavity 111 due to the temperature difference. In this way, on the one hand, the volume of the air guide cavity 111 can be kept constant, ensuring that the gas has sufficient flow rate and flow in the air guide cavity 111, thereby improving the ventilation of the breathing tube 10. At the same time, it also eliminates the environment for bacterial proliferation, avoids lung infection to the patient, and thus improves the safety of the breathing tube 10.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A breathing tube, characterized in that: include: An air guide component, the air guide component having an air guide cavity and capable of generating heat; A connector connected to an end of the gas guide assembly; A thermal insulation film, wherein the thermal insulation film is sleeved on the air guide component; and An installation component is sleeved outside the thermal insulation film to fix the thermal insulation film.

2. The breathing tube according to claim 1, characterized in that The air guide assembly comprises an air guide tube and a heating element. The air guide tube forms the air guide cavity. The heating element is arranged on the outer wall surface of the air guide tube. The thermal insulation film covers the heating element and the air guide tube.

3. The breathing tube according to claim 2, characterized in that The air guide assembly further includes a reinforcing rib, which is spirally wound around the outer wall of the air guide tube, and the heating element is located on the reinforcing rib.

4. The breathing tube according to claim 1, characterized in that The mounting assembly is in contact with the joint along the axial direction of the breathing tube, and an installation gap is formed between the mounting assembly and the joint or the air guide assembly; or an installation gap is formed in the mounting assembly; and the end of the thermal insulation film is fixed in the installation gap.

5. The breathing tube according to claim 4, characterized in that The mounting assembly includes an outer mounting sleeve, which is sleeved on the joint, and the mounting gap is formed between the outer mounting sleeve and the joint. The outer mounting sleeve includes a first protrusion located in the mounting gap, and the first protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap. The joint includes a limiting protrusion located in the mounting gap, and the limiting protrusion is protrudingly arranged on the outer wall surface of the joint for defining the boundary of the mounting gap. The first protrusion and the limiting protrusion are spaced apart along the axial direction of the breathing tube and respectively press against opposite sides of the thermal insulation film.

6. The breathing tube according to claim 5, characterized in that The outer mounting sleeve also includes a second protrusion located in the mounting gap and spaced apart from the first protrusion, the second protrusion protruding from the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap, the limiting protrusion is located between the first protrusion and the second protrusion, the first protrusion and the second protrusion are simultaneously pressed against the outer side of the thermal insulation film, and the limiting protrusion is pressed against the inner side of the thermal insulation film.

7. The breathing tube according to claim 4, characterized in that The mounting assembly includes an outer mounting sleeve, which is mounted on the joint, and the mounting gap is formed between the outer mounting sleeve and the joint. The outer mounting sleeve includes a first protrusion located in the mounting gap, and the first protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap. The outer wall surface of the joint for defining the boundary of the mounting gap is recessed to form a groove, and the first protrusion cooperates with the groove to press the thermal insulation film located in the groove.

8. The breathing tube according to claim 4, characterized in that The mounting assembly includes an outer mounting sleeve, the joint sleeve is arranged outside the outer mounting sleeve, the outer mounting sleeve is sleeved on the air guide assembly and forms the mounting gap with the air guide assembly, and the thermal insulation film is connected to the outer mounting sleeve and the air guide assembly by injection molding.

9. The breathing tube according to claim 4, characterized in that The air guide component includes an air guide pipe and reinforcing ribs, the reinforcing ribs are spirally wound on the outer wall surface of the air guide pipe, the mounting component includes an outer mounting sleeve, the joint sleeve is arranged outside the outer mounting sleeve, the outer mounting sleeve is sleeved on the air guide component and forms the mounting gap with the air guide component, the outer mounting sleeve includes a first protrusion located in the mounting gap, the first protrusion is protruding on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap, a limiting groove is formed between two adjacent circles of the reinforcing ribs, the first protrusion cooperates with the limiting groove to press the thermal insulation film located in the limiting groove.

10. The breathing tube according to claim 4, characterized in that The mounting assembly includes an outer mounting sleeve and an inner mounting sleeve, the inner mounting sleeve is sleeved on the air guide assembly, and the outer mounting sleeve is sleeved on the inner mounting sleeve and the joint at the same time, and the mounting gap is formed between the outer mounting sleeve and the inner mounting sleeve; the outer mounting sleeve includes a first protrusion and a second protrusion arranged at intervals, the first protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve for defining the boundary of the mounting gap, the second protrusion is protrudingly arranged on the inner wall surface of the outer mounting sleeve located outside the mounting gap, the inner mounting sleeve includes a third protrusion, the third protrusion is protrudingly arranged on the outer wall surface of the inner mounting sleeve for defining the boundary of the mounting gap, the first protrusion and the third protrusion are arranged at intervals to press against opposite sides of the thermal insulation film respectively, a recessed groove is provided on the joint, and the second protrusion cooperates with the recessed groove.

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