Duct and range hood

Abstract

The present invention provides a pipe and a range hood, and relates to the technical field of fluid flow equipment of kitchen appliances. The pipe wall of the pipe comprises an inner layer and an outer layer, the inner side of the inner layer forms a fluid channel, the outer layer is sleeved on the outer side of the inner layer, and a sealed cavity is formed between the outer layer and the inner layer, and a filling port for filling material to enter the sealed cavity is provided on the outer layer and / or the inner layer; the sealed cavity has a filled state and a non-filled state, and in the non-filled state, the pipe wall can be folded for storage; from the non-filled state to the filled state, the sealed cavity gradually expands to stretch the pipe wall; in the filled state, the pipe wall can maintain stretching to allow fluid to pass through; the storage of the pipe in a non-use environment and the stretching of the pipe in a use environment are achieved by changing the state of the sealed cavity, rather than relying on stretching in the form of folds, which can reduce the loss of the fluid along the way, and when used as an air outlet pipe of the range hood, the oil discharge performance of the range hood is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fluid flow equipment of kitchen appliances, and in particular to a pipe and a range hood. Background Art

[0002] With the advancement of science and technology and the improvement of people's living standards, range hoods (also called range hoods or extractor hoods, etc.) have become standard products of kitchen appliances. They are connected to the public flue through the air outlet pipe 1' to exhaust cooking fumes. Especially when cooking with a large amount of oil, stir-frying, and deep-frying, more fumes are generated. Range hoods can greatly improve the cooking environment. At present, there are generally three types of range hood outlet pipes 1' commonly used on the market, one is a single-layer plastic tube, the second is a single-layer aluminum foil tube, and the third is a double-layer tube. They have two common advantages. One is that they can be folded and reduced for easy transportation, and the other is that they can be stretched so that they can be used within a certain length range. In order to facilitate transportation, the air outlet pipe 1' of the above-mentioned existing range hoods mostly adopts a threaded pleated air outlet pipe, such as Figure 1 The figure shows the air outlet pipe 1' when it is not opened, that is, when it is stored in a non-use environment. At this time, the air outlet pipe 1' is compressed in the length direction by the close fit of the folds 2', and occupies less space and is convenient for transportation. When the air outlet pipe 1' is installed in a use environment, the length of the air outlet pipe 1' is changed by loosening the tightness of the folds 2' of the air outlet pipe 1', so that the air outlet pipe 1' is opened and connected between the range hood and the public flue. At this time, the opening state of the air outlet pipe 1' is as shown in FIG. Figure 2 As shown, Figure 2 The direction of the arrow indicates the flow direction of the oil smoke.

[0003] Although the existing air outlet pipe 1' has the advantages of convenient transportation and strong versatility by changing its length, the change of the length of the air outlet pipe 1' depends on the threaded folds 2'. When the air outlet pipe is opened and connected between the range hood and the public flue, although the density and depth of these folds 2' are reduced, the folds 2' cannot disappear, that is, the inner wall of the air outlet pipe 1' still has continuous "W"-shaped folds 2'. The inner wall of the air outlet pipe 1' is not smooth and the resistance coefficient is very large. When the fluid passes through the rough pipe surface, a large amount of eddy currents are easily generated. When the fluid (oil smoke) moves, due to the influence of its own viscosity and the roughness of the pipe wall, a large friction force will be generated between the fluid and the wall and between the fluid particles. The friction force will cause a large amount of loss along the way, reducing the actual air volume of the range hood, thereby seriously affecting the smoke extraction effect of the range hood, resulting in the range hood being unable to absorb the oil smoke and increasing the noise.

[0004] The same problem exists in the fluid corrugated delivery pipes of other similar kitchen appliances. Summary of the invention

[0005] The object of the present invention is to provide a tube to solve the technical problem that the fluid conveying pipeline of kitchen appliances, such as the air outlet pipe of a range hood, adopts a threaded corrugated tube to take into account both convenient transportation and actual use environment, resulting in a large amount of fluid loss along the way under the use environment.

[0006] The present invention also aims to provide a range hood to solve the technical problem that the air outlet duct of the range hood adopts a threaded corrugated tube in order to take into account the convenience of transportation and the actual use environment, which leads to a large amount of fluid loss along the way under the use environment.

[0007] The tube provided by the present invention is used for conveying fluid of kitchen appliances. The tube wall of the tube includes an inner layer and an outer layer. The inner side of the inner layer forms a fluid channel. The outer layer is sleeved on the outer side of the inner layer, and a sealed cavity is formed between the outer layer and the inner layer. A filling port for a filler to enter the sealed cavity is provided on the outer layer and / or the inner layer.

[0008] The sealed cavity has a filled state and a non-filled state. In the non-filled state, the tube wall can be folded to accommodate; from the non-filled state to the filled state, the sealed cavity gradually expands to stretch the tube wall; in the filled state, the tube wall can maintain stretching to allow fluid to pass through.

[0009] Furthermore, the tube wall is divided into a plurality of units connected in sequence along the length direction in the stretched state, and adjacent units can be separated and connected;

[0010] The sealed cavities between adjacent units are sealed with each other, and each unit is provided with a filling port on its outer layer and / or inner layer for allowing fillers to enter the sealed cavity; or

[0011] The sealed cavities between adjacent units are connected, and the outer layers and / or the inner layers of all or part of the units are provided with filling ports for filling materials to enter the sealed cavities.

[0012] Furthermore, the filler is gas, the filling port is an inflation port, and a sealing member capable of sealing the filling port is connected to the inflation port.

[0013] Furthermore, the inner surface of the outer layer and the outer surface of the inner layer between adjacent units are connected to each other, and a communication port for connecting the sealed cavities of adjacent units is provided at the connection position.

[0014] Furthermore, a connecting pipe for connecting the sealed cavities of adjacent units is provided at the connecting position, the connecting pipe forms the connecting port, and at least a part of the connecting pipe can be deformed under an external force so that the conducting channel of the connecting pipe is closed.

[0015] Furthermore, along the annular circumference of the fluid channel, a plurality of the communication ports are provided between adjacent units.

[0016] Furthermore, the inner surface of the outer layer between adjacent units is connected to the outer surface of the inner layer by heat pressing, mechanical pressing or gluing;

[0017] And / or, the materials of the inner layer and the outer layer are both polyurethane polymer material or nylon material;

[0018] And / or, in the filled state, the inner surface of the inner layer facing the fluid channel is a smooth surface.

[0019] Furthermore, the length of each of the units in the extended state is between 100 mm and 300 mm.

[0020] Furthermore, the pipe is an air outlet pipe of a range hood.

[0021] The range hood provided by the present invention comprises the pipe provided by the present invention, and the pipe is an air outlet pipe of the range hood.

[0022] The tube provided by the present invention is used for conveying fluid of kitchen appliances. The tube wall of the tube includes an inner layer and an outer layer. The inner side of the inner layer forms a fluid channel. The outer layer is sleeved on the outer side of the inner layer, and a sealed cavity is formed between the outer layer and the inner layer. The outer layer and / or the inner layer are provided with a filling port for the filler to enter the sealed cavity. The sealed cavity has a filling state and a non-filling state. In the non-filling state, the tube wall can be folded for storage. From the non-filling state to the filling state, the sealed cavity gradually expands to stretch the tube wall. In the filling state, the tube wall can maintain the stretching to allow the fluid to pass through. In a non-use environment, the sealed cavity of the tube of the present invention can be in a non-filling state, at which time the sealed cavity is not expanded, and the tube wall can be folded, so that the tube can be folded to a convenient storage form, which is convenient for storage and transportation in a non-installation use environment. In a use environment, the sealed cavity of the tube of the present invention can be in a filling state, at which time the sealed cavity is expanded, and the tube wall can maintain the stretching in the use environment, so that the fluid can pass smoothly. Since the storage of the tube in the non-use environment and the extension in the use environment are realized by changing the state of the sealed cavity, rather than relying on the stretching of the fold form, the tube wall, especially the inner layer of the tube wall, does not need to be in the form of folds, and in the process from the non-filled state to the filled state, the sealed cavity will gradually expand, causing the tube wall to stretch, so the inner side of the inner layer of the tube wall forming the fluid channel has a small friction resistance in the filled state, which can facilitate the passage of the fluid and reduce the loss of the fluid along the way. For example, when the tube is used as the air outlet of a range hood, it is not easy to generate eddy currents, the energy loss along the way is small, the noise is small, and the oil discharge performance of the range hood is improved.

[0023] The range hood provided by the present invention comprises the pipe provided by the present invention. The pipe, which serves as the air outlet pipe of the range hood, is not easy to generate eddy currents, has less energy loss and noise along the way, and improves the oil exhaust performance of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the storage of the prior art air outlet pipe when it is not opened, that is, in a non-use environment;

[0026] Figure 2 This is a schematic diagram of the opening of the air outlet pipe in the prior art under the use environment;

[0027] Figure 3 A schematic diagram of a tube provided by an embodiment of the present invention in a non-use environment;

[0028] Figure 4 A partial schematic diagram of a tube provided by an embodiment of the present invention being deployed in a sealed cavity in an unfilled state;

[0029] Figure 5 A partial schematic diagram of a tube provided by an embodiment of the present invention being deployed in a use environment;

[0030] Figure 6 A partial schematic cross-sectional view of a tube provided in an embodiment of the present invention where no conducting tube is provided;

[0031] Figure 7 A partial cross-sectional schematic diagram of the position of the conducting tube provided in the embodiment of the present invention;

[0032] Figure 8 A schematic cross-sectional view of a tube provided by an embodiment of the present invention in a use environment;

[0033] Fig. 9 A partial schematic cross-sectional view of a connecting pipe of a pipe provided in an embodiment of the present invention in a use environment;

[0034] Fig.10 A schematic diagram of a closed state of a connecting pipe of a pipe provided in an embodiment of the present invention;

[0035] Fig.11 A schematic diagram of unit separation of a tube provided in an embodiment of the present invention.

[0036] Icons: 1'-air outlet pipe; 2'-fold; 10-tube wall; 20-fluid inlet end; 30-fluid outlet end; 40-fluid channel; 50-removed unit; 60-retained unit; 70-connector; 100-inner layer; 200-outer layer; 300-filling port; 310-seal; 400-sealed cavity; 500-connecting pipe; 510-installation part; 600-connection position; D-spacing; F-external force. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figures 3 to 10 As shown, this embodiment provides a tube for transporting fluid in kitchen appliances. Figure 3 The arrows indicate the direction of fluid flow. Figure 6 The arrows indicate the flow direction of the fluid. Figure 7 The dotted arrow below represents the flow of the fluid, and the solid arrow above represents the intake direction of the gas during inflation.

[0039] Specifically, the tube wall 10 of the tube of this embodiment includes an inner layer 100 and an outer layer 200, the inner side of the inner layer 100 forms a fluid channel 40, the outer layer 200 is sleeved on the outer side of the inner layer 100, and a sealed cavity 400 is formed between the outer layer 200 and the inner layer 100, and a filling port 300 is provided on the outer layer 200 and / or the inner layer 100 for filling to enter the sealed cavity 400. The sealed cavity 400 has a filled state and a non-filled state, in which the tube wall 10 can be folded for storage; from the non-filled state to the filled state, the sealed cavity 400 gradually expands to stretch the tube wall 10; in the filled state, the tube wall 10 can maintain the stretch to allow the fluid to pass through.

[0040] The pipe of this embodiment can be applied to the transportation of fluids in kitchen appliances, such as the drain pipe of a dishwasher, the air outlet pipe of a range hood, etc. This embodiment mainly uses the application of the pipe to the range hood, and describes it as an example of the air outlet pipe of the range hood.

[0041] Among them, a filling port 300 is provided on the outer layer 200 and / or the inner layer 100 for the filler to enter the sealed cavity 400. That is, the filling port 300 can be provided on the inner layer 100, and the filling port 300 can also be provided on the outer layer 200. Naturally, the filling port 300 can also be provided in both the inner and outer layers 200. Generally, considering convenience and the like, the filling port 300 is preferably provided on the outer layer 200.

[0042] It should be understood that "a sealed cavity 400 is formed between the outer layer 200 and the inner layer 100", that is, when the filler is filled between the inner layer 100 and the outer layer 200, the filler should not come out of the sealed cavity 400. For example, when the filler is a gas, such as air, the sealed cavity 400 should be able to seal the gas to prevent gas leakage; when the filler is a liquid, such as water, the sealed cavity should be able to seal the liquid to prevent liquid leakage; when the filler is a solid, such as plastic foam, the sealed cavity 400 should be able to prevent the fixed object from falling out of the cavity. Generally speaking, considering the cost and the weight of the tube in use, the filler is usually a gas, which can be air, with almost no cost and easy operation. Corresponding to the form of using gas as the filler in this embodiment, the filling port 300 is an inflation port, and a sealing member 310 capable of sealing the filling port 300 is connected to the inflation port. Specifically, the inflation port can be a structure similar to the inflation port of a basketball, or it can be a structure such as Figure 3 As shown, a sealing cover is hingedly connected to the inflation port, and the opening and closing of the inflation port is controlled by opening or closing the sealing cover.

[0043] It should be explained that the inner layer 100 and the outer layer 200 are relative concepts. Generally speaking, the inner layer 100 and the outer layer 200 can be one layer respectively. However, in some special cases, considering other restrictive conditions, the inner layer 100 or the outer layer 200 may be set as multiple layers. For example, an anti-corrosion layer can be added to the outer peripheral surface of the two layers, or the outer layer 200 can be set as multiple layers, and a sealed cavity 400 is formed between the outer layer 200 and the inner layer 100, and a sealed cavity 400 can also be formed between adjacent outer layers 200. Regardless of the form, a fluid channel 40 is formed in at least one of the multiple layers, and a sealed cavity 400 is formed between two adjacent layers, and the sealed cavity 400 is preferably set on the outside of the layer forming the fluid channel 40, so as to facilitate the unfolding of the layer forming the fluid channel 40 and avoid wrinkles. This embodiment is mainly described by taking the form of the inner layer 100 and the outer layer 200 as one layer as an example.

[0044] In this embodiment, it is defined that "in the non-filled state, the tube wall 10 can be folded to be stored", that is, Figure 3 As shown, when the filler is not filled into the sealed cavity 400, the inner surfaces of the inner layer 100 of the tube wall 10 are close to each other, and the materials of the inner layer 100 and the outer layer 200 have the ability to fold and deform, that is, the materials of the inner layer 100 and the outer layer 200 are relatively soft. The folding of the specific tube wall 10 can be in a stacked folding form similar to a fire hose. "In the filled state, the tube wall 10 can maintain stretching to allow fluid to pass through", that is, as Figure 5As shown, when the filler is filled into the sealed cavity, the inner layer 100 and the outer layer 200 can be supported by the supporting force or pressure of the filler, so that the tube wall 10 formed by the inner layer 100 and the outer layer 200 has a fixed shape and a certain strength, so that it can exist stably and not easily deformed under the use environment. In this embodiment, considering the special use environment of the air outlet pipe of the range hood, the material of the inner layer 100 and the outer layer 200 of the tube of this embodiment needs to have high temperature resistance, flame retardancy and other characteristics, so combined with the characteristics that the tube itself needs to have, the material of the inner layer 100 and the outer layer 200 of the tube of this embodiment can be polyurethane polymer material or nylon material.

[0045] It should be understood that the materials of the inner layer 100 and the outer layer 200 given in this embodiment are merely examples, and in actual applications, they can be reasonably selected according to the characteristics to be achieved.

[0046] In the non-use environment, the sealed cavity 400 of the tube of this embodiment can be in a non-filled state, in which the sealed cavity 400 is not expanded, and the tube wall 10 can be folded, so that the tube can be folded into a convenient storage form, which is convenient for storage and transportation in the non-installation use environment; in the use environment, the sealed cavity 400 of the tube of this embodiment can be in a filled state, in which the sealed cavity 400 is expanded, and the tube wall 10 can maintain stretching in the use environment, so that the fluid can pass smoothly. Since the storage of the tube of this embodiment in the non-use environment and the stretching in the use environment are achieved by the state change of the sealed cavity 400, rather than relying on the stretching in the form of folds, the tube wall 10, especially the inner layer 100 of the tube wall 10, does not need to be in the form of folds, and in the process from the non-filled state to the filled state, the sealed cavity 400 will gradually expand, so that the tube wall 10 stretches, so the inner side of the inner layer 100 of the tube wall 10 forming the fluid channel 40 has a small friction resistance in the filled state, which can facilitate the passage of the fluid and reduce the loss of the fluid along the way. When the tube is used as an air outlet pipe of a range hood, the fluid inlet end 20 of the tube is connected to the range hood, and the fluid outlet end 30 of the tube is connected to a public flue. Eddy currents are not easily generated in the fluid channel 40 of the tube, energy loss along the way is small, noise is small, and the oil exhaust performance of the range hood is improved.

[0047] The non-use environment referred to in this embodiment is the state in which the pipe is not installed on the equipment. Specifically, it may be the state in which the pipe is in storage or transportation. For example, in this embodiment, the non-use state is the state in which the air outlet pipe is not connected to the range hood for use. The relative use environment is the state in which the air outlet pipe is connected between the range hood and the public flue so that the oil smoke can be sucked out and discharged.

[0048] In order to better reduce the frictional resistance of the fluid, in the present embodiment, the inner surface of the inner layer 100 of the tube facing the fluid channel 40 is preferably a smooth surface, that is, the inner layer 100 is not prepared with a relatively rough surface, and its overall surface is flat, especially when the sealed cavity 400 is in a filled state, the inner surface of the overall inner layer 100 is preferably also propped up to a state without any wrinkles.

[0049] Since the length of the tube is constant after the sealed cavity 400 is inflated, in order to meet the different length requirements of different kitchens and improve the versatility of the tube, as a specific form, the tube wall 10 of the tube in this embodiment is divided into a plurality of units connected in sequence along the length direction of the stretched state, and adjacent units can be separated and connected.

[0050] The pipe wall 10 is designed with multiple units along the length direction, so that the user can reduce one or more units according to the actual needs of the kitchen to ensure that the air outlet pipe can smoothly transition and connect the range hood and the public flue. Fig.11 As shown, one of the units (the removed unit 50) of the fluid outlet end 30 can be removed by cutting along the fluid outlet end 30 with a pair of scissors or the like. Fig.11 The dotted line cuts off the removed unit 50, and the retained unit 60 is used to connect with the public air duct.

[0051] Among them, the sealed cavities 400 between adjacent units can be sealed independently of each other, so that each unit is provided with a filling port 300 on its outer layer 200 and / or inner layer 100 for the filler to enter the sealed cavity 400, and each filling port 300 is connected to a sealing member 310 to facilitate the filling of gas into the sealed cavity 400 of each unit through the filling port 300, and can be sealed by the sealing member 310.

[0052] As another preferred form, the sealed cavities 400 between adjacent units can be connected, so that only the outer layer 200 or the inner layer 100 of some units need to be provided with a filling port 300 for the filler to enter the sealed cavities 400. Of course, the filling port 300 can also be provided on all units, but considering the economy, it is generally sufficient to provide the filling port 300 on the outer layer 200 of one unit. Since the removal of some units is usually carried out along one end of the tube, it is preferred that the filling port 300 is provided on the outer layer 200 of the first unit at one end of the tube body, as shown in the specific example. Figure 3 As shown, the filling port 300 of the tube of this embodiment is arranged on the outer layer 200 of the first unit of the fluid inlet end 20 of the tube body. In this form of the range hood, if one of the units is separated and removed, the sealed cavity 400 of the adjacent reserved unit 60 of the removed unit 50 can be sealed. In this embodiment, the sealed cavity 400 between adjacent units is mainly described as being connected.

[0053] Specifically, in this embodiment, the inner surface of the outer layer 200 between adjacent units is connected to the outer surface of the inner layer 100 to form a separation position of the adjacent units, and a communication port for connecting the sealed cavities 400 of the adjacent units is provided at the connection position 600. Specifically, the inner surface of the outer layer 200 between adjacent units and the outer surface of the inner layer 100 can be connected by hot pressing, mechanical pressing or gluing. The connection position 600 of the inner layer 100 and the outer layer 200 of the tube in this embodiment is connected by hot pressing, that is, the connection position 600 is a hot pressing bonding portion of the inner layer 100 and the outer layer 200.

[0054] Specifically, the connection position 600 is provided with a connecting pipe 500 for connecting adjacent units, and the channel of the connecting pipe 500 serves as a connecting port between the sealed cavities 400 of adjacent units. Fig. 9 In order to facilitate the sealing of the sealed chamber 400 of the retained unit 60 adjacent to the removed unit 50 after the separation and removal of some units, at least part of the connecting pipe 500 of the pipe in this embodiment can be deformed under external force to close the channel of the connecting pipe 500. As a specific implementation form, the connecting pipe 500 can be a cylindrical thin-walled metal pipe, such as Fig.10 As shown, the connecting pipe 500 can be flattened by squeezing it with an external force F, and then the seal can be strengthened with adhesive tape.

[0055] In order to ensure the smoothness of the inner layer 100 in the filled state, Figure 5 , Fig. 9 or Fig.10 As shown, the tube of this embodiment protrudes outward at the position of the outer layer 200 corresponding to the connecting tube 500 to form a mounting portion 510, and the connecting tube 500 is arranged in the mounting portion 510 and communicates with the sealed cavities 400 of the two adjacent units. That is, the space occupied by the connecting tube 500 is formed by the outer layer 200 protruding outward, which will not squeeze the inner layer 100, and prevent the inner layer 100 from protruding inward at the position of the connecting tube 500, thereby ensuring the smoothness of the inner layer 100.

[0056] In order to enable the sealed chamber 400 between adjacent units to be inflated quickly, as Figure 5 As shown, in this embodiment, a plurality of connecting pipes 500 are arranged between adjacent units along the annular circumference of the fluid channel 40. Specifically, four connecting pipes 500 may be arranged at equal intervals, so that in the process of inflating through a single filling port 300, four positions of the circumference of the tube body can be connected at the same time, thereby ensuring the connectivity of the sealed cavities 400 between adjacent units, and achieving the purpose of gas filling quickly and smoothly.

[0057] It should be noted that the connecting openings of the sealed cavities of adjacent units may also be directly in the form of through openings. With this type of connecting opening, after some units are removed, the connecting openings of the retained units 60 adjacent to the removed units 50 may be sealed by gluing and plastic tape.

[0058] Considering the strength of the tube and the stability of the tube body when the sealed cavity 400 is filled, the length of each unit in the extended state is between 100 mm and 300 mm, that is, the spacing D between the connection positions 600 between adjacent units is between 100 mm and 300 mm, and 160 mm is preferred in this embodiment. According to the requirements of the air outlet duct length of general kitchens, under the set length of each unit in the extended state, generally 12 units can meet the needs of most kitchens.

[0059] It should be emphasized that when the sealed cavity 400 of the tube of this embodiment is in a filled state, the cross section of the fluid channel 40 can be square, circular or irregular, so the annular circumference of the fluid channel 40 is not limited to the circumference of the circular ring, and the specific shape of the annular ring will also change accordingly corresponding to the cross-sectional shape of the tube body. Since circular tubes have many advantages, the tubes usually used in kitchen appliances are circular tubes, so when the sealed cavity 400 of the tube of this embodiment is in a filled state, that is, when the tube is in a use environment, the cross section of the fluid channel 40 is also circular.

[0060] Meanwhile, the fluid inlet end 20 of the tube is connected with a joint 70 , and the joint 70 may be made of a hard material, so as to facilitate connecting the tube to the range hood through the joint 70 .

[0061] In summary, in the non-use environment, such as during storage or transportation, the sealed cavity 400 of the tube of this embodiment is not inflated, and is folded to facilitate packaging for transportation or storage. Figure 1 When it is needed, unfold the tube as shown. Figure 4 As shown, then first remove the unit at one end away from the unit where the inflation port is set according to the required length. The disassembly process is as follows: Fig.11 As shown, the connecting pipe 500 of the retained unit 60 adjacent to the removed unit 50 is squeezed and sealed, and the seal is strengthened by an adhesive tape; then the sealed cavity 400 of the unit where the inflatable port is set is inflated through the inflation port. If there is no need to adjust the length, the sealed cavity 400 of the unit where the inflatable port is set can be inflated directly through the inflation port. Since the sealed cavities 400 of each unit are connected, the sealed cavities 400 of all the retained units can be inflated and filled. After the inflation and filling is completed, the fluid inlet end 20 is connected to the range hood through the joint 70, and the fluid outlet end 30 of the retained unit 60 is connected to the common flue.

[0062] The tube wall of the tube of this embodiment is designed with inner and outer double layers, and a sealed cavity 400 is formed between the inner layer 100 and the outer layer 200. An air filling port is designed at the fluid inlet end 20. When the tube needs to be packaged and transported, the sealed cavity 400 between the inner layer 100 and the outer layer 200 is not inflated, and the tube can be folded to reduce the volume for packaging and transportation. When the tube needs to be used, the air filling port is inflated, and the space between the inner layer 100 and the outer layer 200 is filled with gas, and the tube is transformed from a flat shape when packaged to a cylindrical shape, ensuring that the tube wall of the inner layer 100 of the tube is smooth. It can be seen that the tube of this embodiment can have the advantages of being folded and reduced for transportation like the air outlet pipe of the prior art, and can be adjusted for use within a certain length range, and the inner side of the fluid channel 40 formed by the inner layer 100 of the tube of this embodiment has a small friction resistance in the filled state, which can facilitate the passage of the fluid and reduce the loss of the fluid along the way. In particular, when the tube is used as the air outlet pipe of the range hood, it is not easy to generate eddy currents, the energy loss along the way is small, the noise is small, and the oil discharge performance of the range hood is improved.

[0063] The present embodiment further provides a range hood, which includes the pipe provided in the present embodiment, and the pipe is an air outlet pipe of the range hood, connected between the range hood and a public flue.

[0064] The range hood of this embodiment uses the tube provided in this embodiment as the air outlet pipe of the range hood, which is not easy to generate eddy currents, has less energy loss along the way, and has less noise, thereby improving the oil exhaust performance of the range hood.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tube for conveying fluid in kitchen appliances, characterized in that: The tube wall (10) of the tube comprises an inner layer (100) and an outer layer (200); a fluid channel (40) is formed on the inner side of the inner layer (100); the outer layer (200) is sleeved on the outer side of the inner layer (100); and a sealed cavity (400) is formed between the outer layer (200) and the inner layer (100); the tube wall (10) is divided into a plurality of units connected in sequence along the length direction in the stretched state, and adjacent units can be separated and connected; the sealed cavities (400) between adjacent units are connected, and a filling port (300) for allowing a filler to enter the sealed cavity (400) is provided on the outer layer (200) and / or the inner layer (100) of all or part of the units; The inner surface of the outer layer (200) between adjacent units is connected to the outer surface of the inner layer (100), and at the connection position (600), a connecting pipe (500) is provided at the connection position (600) for connecting the sealed cavity (400) of the adjacent units, the connecting pipe (500) forms a connecting port, and at least a part of the connecting pipe (500) can be deformed under external force so that the channel of the connecting pipe (500) is closed; The sealed cavity (400) has a filled state and a non-filled state, and in the non-filled state, the tube wall (10) can be folded for storage; From the non-filled state to the filled state, the sealed cavity (400) gradually expands to stretch the tube wall (10); in the filled state, the tube wall (10) can maintain its stretch to allow fluid to pass through.

2. The tube according to claim 1, characterized in that The filler is gas, the filling port (300) is an inflation port, and a sealing member (310) capable of sealing the filling port (300) is connected to the inflation port.

3. The tube according to claim 1, characterized in that Along the annular circumference of the fluid channel (40), a plurality of communication ports are arranged between adjacent units.

4. The tube according to claim 1, characterized in that The inner surface of the outer layer (200) between adjacent units is connected to the outer surface of the inner layer (100) by heat pressing, mechanical pressing or gluing; And / or, the inner layer (100) and the outer layer (200) are both made of polyurethane polymer material or nylon material; And / or, in the filled state, the inner surface of the inner layer (100) facing the fluid channel (40) is a smooth surface.

5. The tube according to claim 1, characterized in that The length of each of the units in the extended state is between 100 mm and 300 mm.

6. The tube according to claim 1, characterized in that The pipe is an air outlet pipe of a range hood.

7. A range hood, characterized in that: The range hood comprises the pipe according to any one of claims 1 to 6, and the pipe is an air outlet pipe of the range hood.

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