Range hood

Abstract

The utility model discloses a range hood which comprises a fan and a smoke inlet channel, the fan comprises a volute and an impeller arranged in the volute, the volute is provided with a smoke inlet and a smoke outlet, and the fan is used for being installed above a suspended ceiling and directly or indirectly connected to a top wall or a side wall. The flue gas inlet channel comprises a flue gas inlet section and a flue gas outlet section which are communicated with each other, the flue gas inlet section is used for enabling flue gas to flow into the flue gas inlet channel, the flue gas outlet section is used for being directly or indirectly connected to the top wall or the side wall and covering all the fans, a flue gas outlet is further formed in the side part of the flue gas outlet section, and the flue gas outlet section is used for being directly or indirectly connected to the top wall or the side wall and covering all the fans. And the smoke outlet is used for enabling smoke at the smoke outlet of the volute to flow out. According to the range hood, the structure is optimized, a fan box is omitted, the cost can be reduced, installation is simplified, and the reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen home appliance technical field, especially a kind of range hood. BACKGROUND

[0002] Range hood has become one of indispensable kitchen home appliances in modern family. The main function of range hood is to suck away oil fume when cooking, so as to maintain a good kitchen environment.

[0003] For common integrated range hood, the following shortcomings exist inevitably: when fan operation drives flue gas flow, it will inevitably produce larger noise, resulting in poor user experience when cooking. In order to overcome the above problems, a split range hood is proposed in related technology, which achieves certain noise reduction effect.

[0004] The split range hood mainly includes smoke collecting hood and fan box separated by smoke pipe. The fan is arranged inside the fan box, which needs to be set away from the user as a noise source. The fan box is usually at least partially installed on the ceiling. For the fan box, it is usually a sheet metal part, which is high in cost and heavy in weight. Moreover, when the fan box cooperates with the lower smoke inlet channel, a connecting mechanism needs to be arranged at the cooperation position of the two, and the installer needs to perform installation operations such as screwing during installation to realize the connection. In addition, there is a certain risk of oil leakage at the connection and cooperation position of the fan box and the smoke inlet channel.

[0005] As can be seen from the above, for the split range hood, it is necessary to be further improved to optimize the structure, reduce the cost, simplify the installation and improve the reliability. SUMMARY

[0006] In view of the defects of the prior art, the utility model embodiment provides a range hood, which optimizes the structure of the range hood, eliminates the traditional fan box, reduces the cost, simplifies the installation and improves the reliability.

[0007] The specific technical scheme of the utility model embodiment is as follows:

[0008] A range hood, the range hood comprises: a fan and a smoke inlet channel, the fan comprises a volute and an impeller arranged in the volute, the volute has a smoke inlet and a smoke outlet, the fan is used to be installed above the ceiling and is directly or indirectly connected to the top wall or side wall, the smoke inlet channel comprises a smoke inlet section and a smoke outlet section in communication, the smoke inlet section is used to make flue gas flow into the smoke inlet channel, the smoke outlet section is used to be directly or indirectly connected to the top wall or side wall and cover the entire fan, and the side of the smoke outlet section is further provided with a smoke outlet, the smoke outlet is used to make the flue gas of the smoke outlet of the volute flow out.

[0009] In a preferred embodiment, the fan is arranged to be installed above the suspended ceiling and connected to the top wall directly or indirectly, the flue gas outlet section has an upward opening for being connected to the top wall directly or indirectly; or, the fan is arranged to be installed above the suspended ceiling and connected to the side wall directly or indirectly, the flue gas outlet section has an opening facing the side wall for being connected to the side wall directly or indirectly.

[0010] In a preferred embodiment, the fan is arranged to be installed above the suspended ceiling and connected to the top wall indirectly through a mounting plate, the mounting plate is arranged to be mounted on the top wall directly, the flue gas outlet section has an upward opening for being mounted on the mounting plate; or, the fan is arranged to be installed above the suspended ceiling and connected to the side wall indirectly through a mounting plate, the mounting plate is arranged to be mounted on the side wall directly, the flue gas outlet section has an opening facing the side wall for being mounted on the mounting plate directly.

[0011] In a preferred embodiment, the opening is sealingly connected to the mounting plate.

[0012] In a preferred embodiment, the flue gas inlet passage comprises a flue pipe and a flue gas inlet cover connected to each other, the flue pipe comprises the flue gas inlet section, the flue gas outlet section comprises the flue gas inlet cover and an upper portion of the flue pipe or the flue gas inlet cover, the flue gas outlet section is arranged to be connected to the top wall or side wall directly or indirectly and cover the whole fan, a flue gas inlet opening is arranged on a lower portion of the flue gas inlet cover for being communicated with the upper portion of the flue pipe, the flue gas outlet opening is arranged on a side portion of the flue gas inlet cover for allowing the flue gas to flow out of the outlet opening of the volute.

[0013] In a preferred embodiment, the flue gas inlet cover has a length in the left-right direction greater than that of the flue pipe and / or a width in the front-rear direction greater than that of the flue pipe; or, the flue gas inlet cover has a rectangular or quasi-rectangular cross section.

[0014] In a preferred embodiment, the flue gas inlet cover comprises an expansion portion, the expansion portion comprises a horizontal portion arranged horizontally and a vertical portion arranged vertically connected to the horizontal portion, or, the expansion portion comprises an inclined portion arranged obliquely upwardly and a vertical portion arranged vertically connected to the inclined portion.

[0015] In a preferred embodiment, the flue gas inlet passage is an integrated flue pipe.

[0016] In a preferred embodiment, the flue gas outlet section is non-equal length in the left-right direction, the length of the flue gas outlet section is greater than the length of the flue gas inlet section, and / or, the flue gas outlet section is non-equal width in the front-rear direction, the width of the flue gas outlet section is greater than the width of the flue gas inlet section; or, the cross section of the flue gas outlet section is rectangular or quasi-rectangular.

[0017] In a preferred embodiment, the flue gas outlet section comprises an expansion section; the expansion section comprises a horizontally arranged horizontal section and a vertically arranged vertical section connected to the horizontal section, or, the expansion section comprises an upwardly inclined arranged inclined section and a vertically arranged vertical section connected to the inclined section.

[0018] In a preferred embodiment, the horizontal section is formed by the pipe wall of the flue gas pipe extending horizontally, the vertical section is formed by the pipe wall of the flue gas pipe extending vertically upward from the horizontal section, or, the inclined section is formed by the pipe wall of the flue gas pipe extending upwardly and obliquely, the vertical section is formed by the pipe wall of the flue gas pipe extending vertically upward from the highest point of the inclined section.

[0019] In a preferred embodiment, the flue gas pipe further comprises a communication section, the communication section is located between the flue gas inlet section and the flue gas outlet section, the length of the communication section and the flue gas inlet section in the left-right direction and / or the width of the communication section and the flue gas inlet section in the front-rear direction are the same or substantially the same.

[0020] In a preferred embodiment, at least the flue gas outlet section comprises a double-layer flue gas pipe section, the double-layer flue gas pipe section comprises an outer layer pipe section and an inner layer pipe section, a noise reduction device is arranged between the outer layer pipe section and the inner layer pipe section, the inner layer pipe section is provided with a sound hole or the inner layer pipe section is fully closed, or, the flue gas outlet section comprises a single-layer flue gas pipe section, the flue gas pipe further comprises a communication section, the communication section and / or the flue gas inlet section comprises a double-layer flue gas pipe section, the double-layer flue gas pipe section comprises an outer layer pipe section and an inner layer pipe section, a noise reduction device is arranged between the outer layer pipe section and the inner layer pipe section, the inner layer pipe section is provided with a sound hole or the inner layer pipe section is fully closed.

[0021] In a preferred embodiment, the flue gas pipe is a rigid flue gas pipe or a flexible flue gas pipe, the flue gas pipe is a double-layer flue gas pipe, the double-layer flue gas pipe comprises an outer layer pipe and an inner layer pipe, a noise reduction device is arranged between the outer layer pipe and the inner layer pipe, the inner layer pipe is provided with a sound hole or the inner layer pipe is fully closed.

[0022] In a preferred embodiment, the opening is provided with a flange, the flange is used to be directly or indirectly connected to the top wall or the side wall.

[0023] In a preferred embodiment, the smoke inlet cover is made of plastic material, and / or the volute is made of plastic material, and / or the impeller is made of plastic material.

[0024] In a preferred embodiment, the range hood further comprises a lower cavity, the fan, the partial smoke inlet channel and the lower cavity are sequentially arranged from top to bottom.

[0025] The technical scheme of the utility model has the following remarkable beneficial effects:

[0026] In the embodiment of the present application, the smoke outlet section of the smoke inlet channel can replace the original fan box, i.e. the fan box can be omitted, and when the fan box is omitted, the cost of the range hood can be reduced; the steps of installing the fan box and the docking of the fan box and the lower smoke inlet channel are omitted, which can achieve the effect of simplifying the installation; in addition, since the fan box is cancelled, the position of the fan box matched with the original lower smoke inlet channel is also directly cancelled, thereby reducing the oil permeation position of the range hood and improving the reliability of the range hood.

[0027] With reference to the following description and drawings, specific embodiments of the utility model are disclosed in detail, and the principle of the utility model can be adopted. It should be understood that the embodiments of the utility model are not limited in scope. Within the scope and clauses of the appended claims, the embodiments of the utility model include many changes, modifications and equivalents. The features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar way, combined with the features in other embodiments, or replaced by the features in other embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the utility model disclosure in any way. In addition, the shapes and scale sizes of the components in the drawings are only illustrative and are used to help understand the utility model, and are not specific limitations on the shapes and scale sizes of the components of the utility model. Those skilled in the art can choose various possible shapes and scale sizes to implement the utility model according to specific circumstances under the guidance of the utility model.

[0029] Figure 1 A structure schematic view of a range hood with an open top provided in the embodiment of the present application;

[0030] Figure 2 A structure schematic view of a range hood with an open top provided in the embodiment of the present application and a mounting plate;

[0031] Figure 3 A partial sectional view of a range hood with an open top provided in the embodiment of the present application;

[0032] Figure 4 This is a schematic diagram of the smoke inlet hood of an open-top range hood provided in the embodiments of this application;

[0033] Figure 5 This is a structural schematic diagram of a range hood with its opening facing the side wall, provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of a range hood with an opening facing the side wall and a mounting plate provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of another type of open-top range hood provided in the embodiments of this application;

[0036] Figure 8 for Figure 7 A schematic diagram of the smoke inlet channel of a range hood.

[0037] Reference numerals in the figures of this application:

[0038] 100. Fan;

[0039] 120. Volute; 121. Smoke inlet; 122. Smoke outlet;

[0040] 200. Smoke inlet passage;

[0041] 210. Flue gas inlet section;

[0042] 220. Flue gas outlet section; 221. Smoke exhaust port;

[0043] 222. Open;

[0044] 223. Flip the edge;

[0045] 230. Connected segment;

[0046] 2. Smoke hood; 21. Smoke inlet; 22. Expansion section;

[0047] 3. Smoke pipe;

[0048] 31. Expansion section; 311. Inclined section; 312. Vertical section;

[0049] 4. Lower cavity;

[0050] 5. Mounting plate;

[0051] X, left and right directions;

[0052] Y, forward / backward direction;

[0053] Z, altitude direction. Detailed Implementation

[0054] The technical solutions of the utility model will be described in detail below in combination with the drawings and specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and not for limiting the scope of the utility model, and after reading the utility model, various equivalent modifications of the utility model made by those skilled in the art all fall within the scope defined by the appended claims of the present application.

[0055] It should be noted that when an element is referred to as "being disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as "being connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein are for purposes of description only and are not intended to be limiting.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] The utility model provides a kind of range hood, and the structure of range hood is optimized, fan box is saved, to reduce cost, simplify installation, improve reliability.

[0058] Please refer to Figures 1 to 7 , a kind of range hood is provided in the embodiment of the present application, which can include: fan 100 and smoke inlet channel 200, the fan 100 includes volute 120 and impeller arranged in the volute 120, as shown in Figure 3 The volute 120 has smoke inlet 121 and smoke outlet 122, the fan 100 is used to be installed above the ceiling and be directly or indirectly connected to top wall or side wall, the smoke inlet channel 200 includes smoke gas inlet section 210 and smoke gas outlet section 220 connected, the smoke gas inlet section 210 is used to make smoke gas flow into the smoke inlet channel 200, the smoke gas outlet section 220 is used to be directly or indirectly connected to the top wall or side wall and cover all the fan 100, the side of the smoke gas outlet section 220 is further provided with smoke outlet 221, and the smoke outlet 221 is used to make the smoke gas of smoke outlet 122 of the volute 120 flow out.

[0059] In the embodiment, the range hood mainly comprises a fan 100 and a smoke inlet channel 200. The fan 100 can comprise a volute 120 and an impeller arranged in the volute 120. When the fan 100 is started, the oil fume generated during cooking can be sucked into the smoke inlet channel 200 through the smoke inlet 121 of the volute 120, and then guided to the smoke outlet 221 of the smoke inlet channel 200 through the smoke outlet 122, and then discharged to a designated position, such as a public flue.

[0060] The range hood provided in the embodiment of the application is specifically a split type range hood. More specifically, the environment where the split type range hood is installed is provided with a suspended ceiling, and the fan 100 is arranged above the suspended ceiling. For the range hood, the fan 100 is the main source of noise. When the fan 100 is arranged above the suspended ceiling, the fan 100 is arranged away from the user side, which is beneficial to weaken the influence of the noise generated by the fan 100 during operation on the user. In addition, when the fan 100 is arranged away from the user, the distance between the fan 100 and the cooking stove where the oil fume is generated is relatively far, so that the oil fume adsorbed on the impeller and the volute 120 of the fan 100 can be effectively reduced, that is, the grease is not easy to accumulate on the fan 100, so as to ensure the reliability of the fan 100 during operation and prolong the service life of the fan 100.

[0061] In the embodiment, the fan 100 can be directly or indirectly connected to the wall. The wall can specifically comprise a top wall, a side wall, or a top wall and a side wall (i.e., the position where the top wall and the side wall meet). Of course, in the embodiment of the application, the embodiment in which the fan 100 is installed on the top wall or the side wall is mainly taken as an example for illustration. Of course, when the installation environment of the fan 100 changes, the fan 100 can also be connected to other positions except the wall in the embodiment of the application.

[0062] When the fan 100 is directly connected to the wall, the fan 100 can be fixed on the wall by a detachable connection mode, such as a threaded fastening connection mode. Of course, other detachable connection modes are not excluded in the application, as long as the fan 100 can be reliably positioned.

[0063] In some scenarios, considering the limitation of the installation condition or the protection of the wall, the fan 100 can not be directly installed on the wall. In this case, the fan 100 can be indirectly installed on the wall. When the fan 100 is indirectly connected to the wall, a transition mounting member can be arranged between the fan 100 and the wall. The transition mounting member can be fixed on the wall by a detachable connection mode, and the transition mounting member can also be connected to the fan 100. The form of the transition mounting member is not limited in the application.

[0064] The fan 100 can be installed in the smoke inlet duct 200. For example... Figure 3 As shown, specifically, the smoke inlet channel 200 may include a connected smoke inlet section 210 and a smoke outlet section 220. The smoke inlet section 210 is used to allow smoke to flow into the smoke inlet channel 200. Specifically, the smoke inlet section 210 may be a section of housing (e.g., a box) with a predetermined length. The smoke outlet section 220 may also be a section of housing (e.g., a pipe section) with a predetermined length. The smoke exhaust port 221 of the smoke inlet channel 200 may be located in the smoke outlet section 220. The smoke exhaust port 221 is used to discharge the smoke from the smoke outlet 122 of the volute 120.

[0065] The flue gas outlet section 220 is used to directly or indirectly connect to the top wall or side wall and cover the entire fan 100. The flue gas outlet section 220 covering the entire fan 100 means that the volute casing 120 and impeller of the fan 100 are entirely located within the flue gas outlet section 220. Of course, in this embodiment, it is not excluded that a portion of the volute casing 120 may be located outside the flue gas outlet section 220. Specifically, the flue gas outlet 122 of the volute casing 120 can be connected to the inner side of the flue gas outlet section 220, or the flue gas outlet 122 can also be inserted into the exhaust port 221, meaning the flue gas outlet 122 extends out of the exhaust port 221 and is partially located on the outer side of the flue gas outlet section 220.

[0066] The situation where the flue gas outlet section 220 covers the entire fan 100 as described in this application includes both the case where the flue gas outlet 122 of the volute 120 is connected to the inside of the flue gas outlet section 220 and the case where the flue gas outlet 122 of the volute 120 extends out of the exhaust port 221. Specifically, the case where the flue gas outlet 122 of the volute 120 extends out of the exhaust port 221 (the flue gas outlet 122 of the volute 120 is located between the exhaust port 221 and the flue gas outlet seat) also falls under the category of the situation where the flue gas outlet section 220 covers the entire fan 100 as described in this application, because the flue gas outlet 122 of the volute 120 occupies only a small portion compared to the entire volute 120.

[0067] In this embodiment, the original fan box can be replaced by the flue gas outlet section 220 of the smoke inlet channel 200, thus eliminating the need for the fan box. Eliminating the fan box reduces the cost of the range hood. It also simplifies installation by eliminating the steps of installing the fan box and connecting it to the lower smoke inlet channel 200. Furthermore, since the fan box is eliminated, the position where the fan box and the original lower smoke inlet channel 200 meet is also eliminated, thereby reducing the areas prone to oil leakage and improving the reliability of the range hood.

[0068] like Figure 1 or Figure 3As shown, in one embodiment, the fan 100 is used to be installed above the ceiling and directly or indirectly connected to the ceiling wall, and the flue gas outlet section 220 has an upward-facing opening 222 for direct or indirect connection to the ceiling wall; or, as Figure 5 or Figure 6 As shown, the fan 100 is used to be installed above the ceiling and directly or indirectly connected to the side wall, and the flue gas outlet section 220 has an opening 222 facing the side wall, the opening 222 being used to be directly or indirectly connected to the side wall.

[0069] In this embodiment, the fan 100 can be installed on a wall, for example, on a top wall or a side wall. When the fan 100 is installed on a top wall, the corresponding flue gas outlet section 220 has an upward-facing opening 222, which facilitates the flue gas outlet section 220 being covered by the opening 222 outside the fan 100. When the fan 100 is installed on a side wall, the corresponding flue gas outlet section 220 has an opening 222 facing the side wall, which facilitates the flue gas outlet section 220 being covered by the opening 222 outside the fan 100.

[0070] The opening 222 can be directly connected to the wall, or it can be indirectly connected to the wall. When the opening 222 is directly connected to the wall, it can be fixed to the wall by a detachable connection method, such as a threaded fastening connection. Of course, other detachable connection methods are not excluded in this application, as long as the opening 222 can be reliably fixed.

[0071] In some scenarios, if the opening 222 is directly connected to the wall, the fumes flowing through the smoke inlet duct 200 may come into direct contact with the wall, causing pollution. To prevent fumes from escaping, the opening 222 can be installed on the wall via an indirect connection. Furthermore, in cases where the wall surface is not smooth enough to meet the requirements for a sealed installation, to ensure that fumes do not easily overflow from the interface between the opening 222 and the wall, the opening 222 can be installed on the wall via an indirect connection with a sealed fit.

[0072] like Figure 2 As shown, in one specific embodiment, the fan 100 is used to be installed above the ceiling and indirectly connected to the ceiling wall via a mounting plate 5, the mounting plate 5 being used to be directly installed on the ceiling wall, and the flue gas outlet section 220 having an upward opening 222, the upward opening 222 being used to be installed on the mounting plate 5.

[0073] Or, such as Figure 6As shown, the fan 100 is used to be installed above the ceiling and indirectly connected to the side wall through the mounting plate 5, which is used to be directly installed on the side wall, and the flue gas outlet section 220 has an opening 222 towards the side wall, which is used to be directly installed on the mounting plate 5.

[0074] In the present embodiment, the fan 100 can be installed on the wall through the mounting plate 5. Taking the wall including the top wall and the side wall as an example, the fan 100 can be installed above the ceiling through the mounting plate 5 and installed on the top wall or the side wall through the mounting plate 5. At the same time, the opening 222 of the flue gas outlet section 220 can also be installed on the wall through the mounting plate 5. Taking the wall including the top wall and the side wall as an example, the opening 222 can be installed on the top wall or the side wall through the mounting plate 5. The mounting plate 5 can be directly installed on the wall. The mounting plate 5 itself can be a plate body with a certain thickness. Of course, in the present embodiment, other forms of structures can also be used instead of the mounting plate 5. In the present embodiment and the drawings, the mounting plate 5 in the form of a plate structure is mainly taken as an example for illustration. When the fan 100 and the opening 222 are both installed on the wall through the mounting plate 5, the mounting plate 5 can be used to stop the flue gas to a certain extent to prevent the flue gas from polluting the wall.

[0075] Further, in order to prevent the flue gas from overflowing outward from the matching position between the mounting plate 5 and the opening 222, the opening 222 can be sealingly connected with the mounting plate 5. The specific way of sealing connection can include any one or a combination of the following: a sealing element is arranged between the mounting plate 5 and the opening 222, sealing glue is applied at the matching position of the mounting plate 5 and the opening 222, etc. Of course, the specific setting way of the sealing connection can also be other ways, which are not limited to the above description. The skilled person in the art can also make other changes under the inspiration of the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, which should be covered within the protection scope of the present application.

[0076] As shown in Figure 3 , Figure 4 , Figure 5 or Figure 6 In one embodiment, the opening 222 is provided with a flange 223, which is used to be directly or indirectly connected to the top wall or the side wall.

[0077] In the present embodiment, the edge of the opening 222 is provided with a flange 223, which can be used for connection when the opening 222 is directly or indirectly connected to the wall, so as to ensure the reliability and sealing performance of the connection. For example, when a sealing element is needed, it can be arranged between the flange 223 and the mounting plate 5. The flange 223 and / or the mounting plate 5 can be provided with a groove matched with the sealing element.

[0078] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the smoke inlet channel 200 includes a connected smoke pipe 3 and a smoke inlet hood 2. The smoke pipe 3 includes the smoke inlet section 210, and the smoke outlet section 220 includes the smoke inlet hood 2 and the upper part of the smoke pipe 3 or the smoke inlet hood 2. The smoke outlet section 220 is used to directly or indirectly connect to the top wall or side wall and cover the entire fan 100. The lower part of the smoke inlet hood 2 is provided with a smoke inlet 21, which is used to communicate with the upper part of the smoke pipe 3. The side of the smoke inlet hood 2 is also provided with a smoke exhaust port 221, which is used to allow the smoke from the smoke outlet 122 of the volute 120 to flow out.

[0079] In this embodiment, the smoke inlet channel 200 is illustrated by an example comprising a connected smoke pipe 3 and a smoke hood 2. The smoke inlet section 210 is disposed within the smoke pipe 3. Specifically, the smoke pipe 3 may include a lower smoke inlet end and an upper smoke outlet end. The smoke inlet section 210 may be a segment of the smoke pipe 3 near the smoke inlet section. Specifically, the length of the smoke inlet section 210 can be determined based on the structure of the smoke pipe 3 and its relationship with lower components. When the smoke inlet section 210 is connected to the lower cavity 4 below it, the smoke inlet section 210 may include a segment that mates with the lower cavity 4. The smoke outlet section 220 may include a segment of the upper part of the smoke hood 2 and the smoke pipe 3 near the smoke outlet end, or the smoke outlet section 220 may include the smoke hood 2.

[0080] The lower part of the fume hood 2 is provided with a fume inlet 21, which is used to connect with the upper flue gas outlet end of the flue pipe 3. The side of the fume hood 2 is also provided with a flue gas outlet 221, which is used to allow the flue gas from the flue gas outlet 122 of the volute 120 to flow out. When the flue gas outlet section 220 includes the fume hood 2, the flue gas outlet section 220 is used to directly or indirectly connect to the wall and cover the entire fan 100. The fume hood 2 realizes the function of the original fan box, which is equivalent to replacing the original fan box. The fume hood 2 is made of plastic, which is lower in cost and lighter in weight compared to the sheet metal parts usually used for fan boxes. That is, the use of plastic for the fume hood 2 can reduce costs, simplify installation, and improve reliability.

[0081] Furthermore, in one embodiment, at least a portion of the fan 100 may be made of plastic. For example, the volute and / or impeller of the fan 100 may be made of plastic. When at least a portion of the fan 100 is made of plastic, the cost and weight of the fan 100 can be reduced. Reduced weight of the fan 100 reduces the workload of operators during installation and improves the reliability of the fan 100 after installation.

[0082] Please combine Figure 1 and Figure 4 In one embodiment, the length of the smoke inlet hood 2 in the left-right direction X is greater than the length of the smoke pipe 3, and / or the width of the smoke inlet hood 2 in the front-back direction Y is greater than the width of the smoke pipe 3; or, the cross-section of the smoke inlet hood 2 is rectangular or quasi-rectangular.

[0083] In this embodiment, the smoke hood 2 is used to cover the periphery of the fan 100. The structure and dimensions of the portion of the smoke hood 2 covering the periphery of the fan 100 can be similar to those of the original fan casing. The cross-section of a typical fan casing is rectangular or rectangular, and the cross-section of the portion of the smoke hood 2 covering the periphery of the fan 100 can also be rectangular or rectangular. Specifically, the cross-sectional dimension of the portion of the smoke hood 2 covering the periphery of the fan 100 is larger than the cross-sectional dimension of the smoke pipe 3. Taking the example of the cross-section of the portion of the smoke hood 2 covering the periphery of the fan 100 being rectangular or rectangular, the smoke hood 2 has a length dimension in the left-right direction (X) and a width dimension in the front-back direction (Y). The length of the smoke inlet hood 2 surrounding the fan 100 in the left-right direction X is greater than the length of the smoke pipe 3; or, the width of the smoke inlet hood 2 surrounding the fan 100 in the front-back direction Y is greater than the width of the smoke pipe 3; or, the length of the smoke inlet hood 2 surrounding the fan 100 in the left-right direction X is greater than the length of the smoke pipe 3 and the width of the smoke inlet hood 2 surrounding the fan 100 in the front-back direction Y is greater than the width of the smoke pipe 3.

[0084] In one embodiment, the smoke hood 2 includes an expansion portion 22; the expansion portion 22 includes a horizontally arranged horizontal portion and a vertically arranged vertical portion connected to the horizontal portion, or the expansion portion 22 includes an upwardly inclined portion and a vertically arranged vertical portion connected to the inclined portion.

[0085] In this embodiment, the smoke inlet hood 2 may include a main body portion for covering the periphery of the fan 100 and an expansion portion 22 for transitionally connecting the main body portion and the smoke pipe 3.

[0086] The expansion portion 22 may include a generally horizontal portion and a generally vertical portion. The horizontal portion may be annular, and its outer edge contour dimension may match the outer contour dimension of the main body portion. The horizontal portion has a center opening that matches the vertical portion, and the contour dimension of the opening may match the outer contour dimension of the vertical portion. The outer contour dimension of the vertical portion may match the outer contour dimension of the flue pipe 3.

[0087] Alternatively, the expansion portion 22 may include an inclined portion and a generally vertical portion. Specifically, the inclined portion may be a hollow shell with a gradually increasing cross-sectional area from top to bottom. The cross-sectional dimension of the uppermost end of the inclined portion may match the cross-sectional dimension of the main body; the cross-sectional dimension of the lowermost end of the inclined portion may match the cross-sectional dimension of the vertical portion. The outer contour dimension of the vertical portion may match the outer contour dimension of the flue 3.

[0088] Of course, the specific structure of the smoke hood 2 can also be in other forms and is not limited to the above description. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0089] like Figure 7 As shown, in some other embodiments, the smoke inlet channel 200 is an integral smoke pipe 3.

[0090] When the smoke inlet channel 200 is an integral smoke pipe 3, compared with the above embodiment, it is equivalent to merging the smoke inlet hood 2 and the smoke pipe 3 into one. This can at least save the cost of setting up the smoke inlet hood 2 separately, eliminate the step of connecting the smoke inlet hood 2 and the smoke pipe 3, and eliminate the position where the smoke inlet hood 2 and the smoke pipe 3 cooperate. Overall, it can further reduce costs, simplify the installation steps, and reduce one of the easy oil leakage points of the range hood, thereby improving the reliability of the range hood.

[0091] Please refer to the following: Figure 7 and Figure 8 In one embodiment, the flue pipe 3 is a flue pipe 3 of unequal length in the left-right direction X, the length of the flue gas outlet section 220 is greater than the length of the flue gas inlet section 210, and / or, the flue pipe 3 is a flue pipe 3 of unequal width in the front-back direction Y, the width of the flue gas outlet section 220 is greater than the width of the flue gas inlet section 210; or, the cross-section of the flue pipe 3 is rectangular or quasi-rectangular.

[0092] In this embodiment, the flue gas outlet section 220 of the flue pipe 3 extends above the suspended ceiling for mounting the fan 100, while the flue gas inlet section 210 of the flue pipe 3 is located below the suspended ceiling for partial installation in a cabinet. To minimize modifications to the flue pipe 3, only the size of the flue gas outlet section 220 above the flue pipe 3 can be enlarged. This ensures that the flue pipe 3 located below the suspended ceiling does not easily interfere with the installation environment such as cabinets, and also meets aesthetic requirements.

[0093] The cross-section of the flue duct 3 can adopt the same rectangular or rectangular structure as the original fan box or smoke inlet hood 2. Based on this rectangular or rectangular structure, the flue gas outlet section 220 is enlarged relative to the flue gas inlet section 210 in at least one dimension in the length and width directions.

[0094] like Figure 8 As shown, in one embodiment, the flue gas outlet section 220 includes an expansion section 31; the expansion section 31 includes a horizontally arranged horizontal section and a vertically arranged vertical section 312 connected to the horizontal section, or the expansion section 31 includes an upwardly inclined section 311 and a vertically arranged vertical section 312 connected to the inclined section 311.

[0095] In this embodiment, the specific structure of the expansion section 31 can refer to the structure of the smoke inlet hood 2, or the structure of the smoke inlet hood 2 combined with the fan box.

[0096] The expansion section 31 may include a generally horizontally arranged horizontal section and a generally vertically arranged vertical section 312. The horizontal section may be annular, and its outer contour dimensions may match those of the vertical section 312. The outer contour dimensions of the vertical section 312 may be larger than those of the flue gas inlet section 210. The horizontal section may be formed by the horizontal extension of the wall of the flue pipe 3, and the vertical section 312 may be formed by the vertical extension of the wall of the flue pipe 3 upwards from the horizontal section.

[0097] Alternatively, the expansion section 31 may include an inclined section 311 and a generally vertical section 312. Specifically, the inclined section 311 may be a hollow tube section with a gradually increasing cross-sectional area from top to bottom. The cross-sectional dimension of the uppermost end of the inclined section 311 may be the same as the cross-sectional dimension of the vertical section 312. The outer contour dimension of the vertical section 312 may be larger than the outer contour dimension of the flue gas inlet section 210. The inclined section 311 may be formed by the upward inclined extension of the wall of the flue pipe 3, and the vertical section 312 may be formed by the upward vertical extension of the wall of the flue pipe 3 from the highest point of the inclined section 311.

[0098] Of course, the specific structure and formation of the expansion segment 31 can also take other forms, and are not limited to the above description. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0099] In one embodiment, the flue pipe 3 may further include a connecting section 230, which is located between the flue gas inlet section 210 and the flue gas outlet section 220. The length of the connecting section 230 and the flue gas inlet section 210 in the left-right direction X and / or the width in the front-back direction Y are the same or substantially the same.

[0100] In this embodiment, the flue pipe 3 may include a flue gas inlet section 210, a connecting section 230, and a flue gas outlet section 220 from top to bottom. The connecting section 230 guides the flue gas introduced from the flue gas inlet section 210 to the flue gas outlet section 220. The shape, structure, and size of the connecting section 230 may be the same as or nearly the same as those of the flue gas inlet section 210. Specifically, the connecting section 230 may be a double-layered pipe or a single-layered pipe. The connecting section 230 may be a smooth-surfaced pipe or a corrugated pipe, etc. Typically, the flue gas inlet section 210 may be a section of pipe used to mate with a lower component (e.g., the lower cavity 4). For example, when the connecting section 230 is a corrugated pipe section, the length of the connecting section 230 and the flue gas inlet section 210 in the left-right direction X and / or the width in the front-back direction Y are the same or substantially the same. Specifically, the projection of the connecting section 230 toward the flue gas inlet section 210 may cover the flue gas inlet section 210.

[0101] In one embodiment, at least the flue gas outlet section 220 includes a double-layer flue pipe section, which includes an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section, and the inner pipe section is provided with a sound-absorbing hole or is completely enclosed.

[0102] In this embodiment, the flue gas outlet section 220 is the portion surrounding the fan 100. When the flue gas outlet section 220 is at least a double-layered flue section, the noise generated by the fan 100 can be isolated by the double-layered flue section, thereby achieving a certain noise reduction effect.

[0103] Specifically, the double-layered flue 3 may include: an inner pipe section and an outer pipe section surrounding the inner pipe section, as well as a noise reduction device disposed between the outer and inner pipe sections. The inner pipe section may have silencing holes, allowing noise to enter the space between the outer and inner pipe sections and be reduced by the noise reduction device. Specifically, the noise reduction device may be a porous sound-absorbing medium, such as sound-absorbing cotton. Alternatively, the inner pipe section may be a fully enclosed structure, in which case the noise reduction device may be sound-insulating cotton.

[0104] In another embodiment, the flue gas outlet section 220 includes a single-layer flue pipe section, and the flue pipe 3 may also include a connecting section 230. The connecting section 230 and / or the flue gas inlet section 210 include a double-layer flue pipe section, which includes an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a sound-absorbing hole or is completely enclosed.

[0105] In this embodiment, the flue gas outlet section 220 can be a single-layer flue pipe section, and the connecting section 230 and the flue gas inlet section 210 below the flue gas outlet section 220 can at least partially be provided with double-layer flue pipe sections, so as to reduce the noise generated by the fan 100 when it is working.

[0106] The specific structure of the double-layer flue section can be referred to the specific description of the above-mentioned implementation method of at least flue gas outlet section 220 including double-layer flue section, which will not be repeated here.

[0107] In one embodiment, the smoke pipe 3 is a rigid smoke pipe or a flexible smoke pipe, and the smoke pipe 3 is a double-layer smoke pipe, which includes an outer layer pipe and an inner layer pipe. A noise reduction device is provided between the outer layer pipe and the inner layer pipe, and the inner layer pipe is provided with a sound-absorbing hole or the inner layer pipe is completely sealed.

[0108] In this embodiment, the flue 3 can be a rigid flue or a flexible flue. When the flue 3 is a flexible flue, it can be deformed according to actual installation requirements, thereby improving the adaptability of the range hood installation and reducing the precision requirements of the installation.

[0109] The smoke pipe 3 can be a double-layered smoke pipe. The double-layered smoke pipe may include an inner pipe, an outer pipe sleeved outside the inner pipe, and a noise reduction device disposed between the outer pipe and the inner pipe.

[0110] The inner tube may have sound-absorbing holes. When these holes are present, noise can enter the space between the outer and inner tubes and be reduced by the noise reduction device. Specifically, the noise reduction device can be a porous sound-absorbing medium, such as sound-absorbing cotton. Alternatively, the inner tube can be a fully enclosed structure, in which case the noise reduction device can be sound-insulating cotton.

[0111] In one embodiment, the range hood may further include a lower cavity 4, wherein the fan 100, a portion of the smoke inlet channel 200, and the lower cavity 4 are arranged sequentially from top to bottom.

[0112] In this embodiment, the range hood may further include a lower cavity 4. The lower cavity 4 is positioned relatively close to the user's cooking area and is used to collect the cooking fumes generated during cooking. Along the direction of smoke flow, the lower cavity 4 and the smoke inlet channel 200 are arranged sequentially. Specifically, in the height direction Z, the fan 100, part of the smoke inlet channel 200, and the lower cavity 4 are arranged sequentially from top to bottom.

[0113] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0114] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0115] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A range hood, characterized in that, The range hood includes a fan and a smoke inlet duct. The fan includes a volute and an impeller disposed within the volute. The volute has a smoke inlet and a smoke outlet. The fan is used to install above the ceiling and is directly or indirectly connected to the ceiling wall or side wall. The smoke inlet channel includes a connected smoke inlet section and a smoke outlet section. The smoke inlet section is used to allow smoke to flow into the smoke inlet channel. The smoke outlet section is used to directly or indirectly connect to the top wall or side wall and cover the entire fan. The side of the smoke outlet section is also provided with a smoke exhaust port, which is used to allow the smoke from the smoke outlet of the volute to flow out.

2. The range hood according to claim 1, characterized in that, The fan is used to be installed above the ceiling and directly or indirectly connected to the ceiling wall. The flue gas outlet section has an upward opening, which is used to connect directly or indirectly to the top wall; or, The fan is used to be installed above the ceiling and directly or indirectly connected to the side wall. The flue gas outlet section has an opening facing the sidewall, which is used to connect directly or indirectly to the sidewall.

3. The range hood according to claim 1, characterized in that, The fan is used to be installed above the ceiling and indirectly connected to the ceiling wall via a mounting plate, the mounting plate is used to be directly installed on the ceiling wall, and the flue gas outlet section has an upward opening, the upward opening being used to be installed on the mounting plate; or, The fan is for installation above the ceiling and indirectly connected to the side wall via a mounting plate, the mounting plate being for direct installation on the side wall, and the flue gas outlet section having an opening facing the side wall for direct installation on the mounting plate.

4. The range hood according to claim 3, characterized in that, The opening is sealed to the mounting plate.

5. The range hood according to claim 1, characterized in that, The smoke inlet channel includes a connected smoke pipe and a smoke inlet hood. The smoke pipe includes a smoke inlet section, and the smoke outlet section includes the smoke inlet hood and the upper part of the smoke pipe or the smoke inlet hood. The smoke outlet section is used to directly or indirectly connect to the top wall or side wall and cover the entire fan. The lower part of the smoke inlet hood is provided with a smoke inlet, which is used to communicate with the upper part of the smoke pipe. The side of the smoke inlet hood is also provided with a smoke exhaust port, which is used to allow the smoke from the smoke outlet of the volute to flow out.

6. The range hood according to claim 5, characterized in that, The length of the smoke inlet hood in the left-right direction is greater than the length of the smoke pipe, and / or the width of the smoke inlet hood in the front-back direction is greater than the width of the smoke pipe; or, the cross-section of the smoke inlet hood is rectangular or quasi-rectangular.

7. The range hood according to claim 6, characterized in that, The smoke hood includes an expansion section; the expansion section includes a horizontally arranged horizontal section and a vertically arranged vertical section connected to the horizontal section, or the expansion section includes an upwardly inclined section and a vertically arranged vertical section connected to the inclined section.

8. The range hood according to claim 1, characterized in that, The smoke inlet channel is an integral smoke pipe.

9. The range hood according to claim 8, characterized in that, The flue is of unequal length in the left-right direction, the length of the flue gas outlet section is greater than the length of the flue gas inlet section, and / or the flue is of unequal width in the front-back direction, the width of the flue gas outlet section is greater than the width of the flue gas inlet section; or, the cross-section of the flue is rectangular or quasi-rectangular.

10. The range hood according to claim 9, characterized in that, The flue gas outlet section includes an expansion section; the expansion section includes a horizontally arranged horizontal section and a vertically arranged vertical section connected to the horizontal section, or the expansion section includes an upwardly inclined section and a vertically arranged vertical section connected to the inclined section.

11. The range hood according to claim 10, characterized in that, The horizontal section is formed by the horizontal extension of the pipe wall of the flue, and the vertical section is formed by the vertical extension of the pipe wall of the flue from the horizontal section upwards; or, the inclined section is formed by the upward inclined extension of the pipe wall of the flue, and the vertical section is formed by the vertical extension of the pipe wall of the flue from the highest point of the inclined section upwards.

12. The range hood according to claim 9, characterized in that, The flue also includes a connecting section located between the flue gas inlet section and the flue gas outlet section. The connecting section and the flue gas inlet section have the same or substantially the same length in the left-right direction and / or width in the front-back direction.

13. The range hood according to claim 8, characterized in that, At least the flue gas outlet section includes a double-layer flue section, which comprises an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a sound-absorbing hole or is completely enclosed. Alternatively, the flue gas outlet section may include a single-layer flue pipe section, the flue pipe may also include a connecting section, the connecting section and / or the flue gas inlet section may include a double-layer flue pipe section, the double-layer flue pipe section may include an outer pipe section and an inner pipe section, a noise reduction device may be provided between the outer pipe section and the inner pipe section, and the inner pipe section may be provided with a sound-absorbing hole or the inner pipe section may be completely enclosed.

14. The range hood according to claim 8, characterized in that, The smoke pipe is either a rigid smoke pipe or a flexible smoke pipe. The smoke pipe is a double-layer smoke pipe, which includes an outer layer pipe and an inner layer pipe. A noise reduction device is provided between the outer layer pipe and the inner layer pipe. The inner layer pipe is provided with a sound-absorbing hole or the inner layer pipe is completely sealed.

15. The range hood according to claim 2, characterized in that, The opening is provided with a flange, which is used to connect directly or indirectly to the top wall or the side wall.

16. The range hood according to claim 5, characterized in that, The smoke inlet hood is made of plastic, and / or the volute is made of plastic, and / or the impeller is made of plastic.

17. The range hood according to claim 1, characterized in that, The range hood also includes a lower cavity, and the fan, part of the smoke inlet channel and the lower cavity are arranged in sequence from top to bottom.

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