Adapter structure for range hood and range hood

Abstract

The embodiment of the present application relates to the technical field of range hoods, and specifically to a switching structure (1) for range hoods, the switching structure (1) comprising a first shell (11) and a second shell (12), the first shell (11) having an air outlet (111), a connection port (112) and a first connection portion (113) located at the connection port (112), the second shell (12) having a connection mating port (121) and a second connection portion (122) located at the connection mating port (121), the connection between the first connection portion (113) and the second connection portion (122) allowing the second shell (12) to be connected to the first shell (11) in one of at least two selectable orientations relative to the air outlet (111). The switching structure provided by the present application can allow the range hood to be adapted to public flues with various opening orientations during installation, thereby facilitating the connection between the range hood and the public flue and improving the installation flexibility of the range hood.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of range hoods, and in particular to a switching structure for range hoods and a range hood including the switching structure. Background Art

[0002] The range hood is one of the most important modern cooking appliances, used to absorb the smoke generated by cooking and discharge it into the public flue. In order to improve the smoke removal and exhaust effect, it is usually desired to shorten the distance between the range hood and the public flue and install the range hood directly above the cooking stove. Therefore, the installation position of the range hood needs to be determined according to the public flue and the cooking stove.

[0003] However, in different buildings or structures, the opening orientation of the public flue may be different. For example, the opening of the public flue may be located on the left, right or front of the installation position of the range hood determined by the cooking stove. This leads to adaptability problems when the same range hood is installed in different public flues in various situations. At present, it is usually impossible to make the same range hood adapt to various opening orientations of existing public flues, which brings inconvenience to the installation of the range hood in some cases. Summary of the invention

[0004] In view of the above problems, the purpose of the present application is to provide an improved adapter structure for a range hood, which can allow the range hood to be adapted to public flues with various opening orientations during installation.

[0005] According to a first aspect of the present application, a transition structure for a range hood is provided, the transition structure comprising a first shell and a second shell, the first shell having an air outlet, a connecting port and a first connecting portion located at the connecting port, the second shell having a connecting mating port and a second connecting portion located at the connecting mating port, wherein the connection between the first connecting portion and the second connecting portion allows the second shell to be connected to the first shell in one of at least two selectable orientations relative to the air outlet.

[0006] According to an optional embodiment of the present application, the side wall of the first shell defines the connection port, the side wall of the second shell defines the connection mating port, and the connection port and the connection mating port have the same centrally symmetrical shape.

[0007] According to an optional embodiment of the present application, the transition structure includes a circumferential sealing structure for connecting the first connecting portion and the second connecting portion.

[0008] According to an optional embodiment of the present application, the sizes of the connection port and the connection mating port are set to enable the first shell to be inserted into the second shell.

[0009] According to an optional embodiment of the present application, the first connection part includes a first connection unit group opposite to the connection port, and the second connection part includes a second connection unit group opposite to the connection mating port, wherein the first connection unit group and the second connection unit group have at least two connection combinations corresponding to the at least two selectable orientations.

[0010] According to an optional embodiment of the present application, the first connection portion has two first connection unit groups, and the second connection portion has only one second connection unit group.

[0011] According to an optional embodiment of the present application, the first connection unit group and the second connection unit group include corresponding through holes, and the first shell is connected to the second shell by inserting fixing components into the corresponding through holes.

[0012] According to an optional embodiment of the present application, the connection port and the connection mating port are both square, and the first connection unit group and the second connection unit group both include through holes arranged at the midpoints of two opposite sides of the square.

[0013] According to an optional embodiment of the present application, the fixing component includes a head and a clamping portion opposite to the head, and the fixing component is configured to clamp the first shell and the second shell between the head and the clamping portion in an installed state.

[0014] According to an optional embodiment of the present application, at least a portion of the fixing component is elastic.

[0015] According to an optional embodiment of the present application, the first shell has a flange located at the connection port, and the second shell has a receiving portion at the connection mating port, and the flange can be engaged with the receiving portion to form the circumferential sealing structure.

[0016] According to an optional embodiment of the present application, the flange and the receiving portion are both formed in a substantially U shape.

[0017] According to an optional embodiment of the present application, the flange is inserted into the receiving portion from top to bottom.

[0018] According to a second aspect of the present application, a range hood is provided, the range hood comprising any one of the adapter structures according to the present application, the range hood being connected to a common flue via the adapter structure.

[0019] According to an optional embodiment of the present application, the fan of the range hood is arranged in the first shell of the adapter structure.

[0020] According to an optional embodiment of the present application, the air outlet of the first shell is connected to or can be connected to a check valve.

[0021] According to an optional embodiment of the present application, the range hood further includes a flue structure and a smoke collecting structure connected thereto, and the second shell constitutes at least a part of the flue structure.

[0022] According to an optional embodiment of the present application, the range hood is of a direct suction type, a side suction type, or a cross-border type.

[0023] According to an optional embodiment of the present application, the flue structure is detachably connected to the smoke collecting structure.

[0024] According to an optional embodiment of the present application, the range hood also includes a volute arranged in the first shell, and the fan is installed in the volute, wherein the outlet of the volute is connected to the air outlet of the first shell, and the inlet of the volute is connected to the connection port of the first shell.

[0025] The adapter structure provided by the present application can allow the range hood to be adapted to public flues with various opening directions during installation, thereby facilitating the connection between the range hood and the public flue, improving the installation flexibility of the range hood, and also facilitating improving the smoke exhaust effect of the range hood. Additionally, the range hood based on such an adapter structure provided by the present application can also have improved installation convenience and a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in more detail below with reference to the accompanying drawings, so that the principles, features and advantages of the present invention can be better understood. In the accompanying drawings:

[0027] Figure 1 A three-dimensional diagram shows a transfer structure and a corresponding range hood according to an embodiment of the present application;

[0028] Figure 2 Shown in front view Figure 1 The transfer structure and the range hood;

[0029] Figure 3 The second housing is shown with respect to the air outlet. Figure 1 Different orientations are connected to the first housing;

[0030] Figure 4 A first housing of a transition structure according to an embodiment of the present application is shown in a three-dimensional diagram;

[0031] Figure 5 Shown in bottom view Figure 4 a first shell in;

[0032] Figure 6A second housing of a transition structure according to an embodiment of the present application is shown in a three-dimensional diagram;

[0033] Figure 7 The top view shows Figure 6 a second shell in;

[0034] Figure 8 A fixing component according to an embodiment of the present application is shown in a perspective view;

[0035] Fig. 9 A partial cutaway view shows the connection between the first housing and the second housing of the transition structure according to an embodiment of the present application;

[0036] Fig.10 for Fig. 9 A magnified view of region A in FIG; and

[0037] Fig.11 for Fig. 9 and Fig.10 Magnified view of area B in FIG.

[0038] Reference numerals list

[0039] 1 Transfer structure

[0040] 11. First Shell

[0041] 111 Air outlet

[0042] 112 Connection port

[0043] 113 First connection

[0044] 114 First connection unit group

[0045] 115 Flanging

[0046] 12 Second shell

[0047] 121 Connection port

[0048] 122 Second connection

[0049] 123 Second connection unit group

[0050] 124 Receiving Department

[0051] P Through Hole

[0052] 13. Fixing parts

[0053] 131 Head

[0054] 132 Card connection

[0055] 2 Range hood

[0056] 21 Fan

[0057] 22 Snail

[0058] 23 Check valve

[0059] 24 Flue structure

[0060] 25 Smoke-collecting structure DETAILED DESCRIPTION

[0061] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the principles of the present application, rather than to limit the scope of protection of the present application. In the various drawings of the present application, features with the same structure or similar functions are represented by the same reference numerals.

[0062] Figures 1 to 11 The adapter structure 1 and the range hood 2 according to the embodiment of the present application are shown from different perspectives. Figures 1 to 11 The embodiments of the present application are described in detail.

[0063] It is worth noting that, for the sake of convenience, the following description may be based on the perspective of a user standing in front of and facing the range hood in the installed state to describe the orientation and relative position relationship of the various components of the adapter structure 1 and the range hood 2. Since in the installed state, the smoke collecting structure 25 (e.g., smoke collecting hood) of the range hood needs to be arranged above the cooking stove along the lateral extension direction of the cooking stove, that is, the orientation of the smoke collecting structure 25 is relatively fixed, and the adapter structure 1 is coupled with the smoke collecting structure 25, therefore, the following description may also use the smoke collecting structure 25 as a reference to describe the orientation and relative position relationship of the various components of the adapter structure 1 and the range hood 2. However, it should be understood that such a description is only descriptive and not restrictive.

[0064] like Figure 1 to Figure 6 As shown, the adapter structure 1 for a range hood according to some embodiments of the present application may include a first shell 11 and a second shell 12. The first shell 11 may have an air outlet 111, a connection port 112, and a first connection portion 113 located at the connection port 112. The second shell 12 may have a connection mating port 121 and a second connection portion 122 located at the connection mating port 121, wherein the connection between the first connection portion 113 and the second connection portion 122 may allow the second shell 12 to be connected to the first shell 11 in one of at least two selectable orientations relative to the air outlet 111.

[0065] The adapter structure 1 according to the present application can be used in the range hood 2 to allow the range hood 2 to be connected to the public flue through the adapter structure 1. Specifically, the adapter structure 1 can be connected to the public flue via the air outlet 111 of the first shell 11, and connected to the smoke collecting structure 25 via the second shell 12. Therefore, the adapter structure 1 according to the present application can allow the range hood 2 to be adapted to the public flue at different positions.

[0066] Herein, the term "at least two selectable orientations" may include two, three or more selectable orientations. Figure 2 and Figure 3 Three typical ones of the at least two selectable orientations of the second housing 12 are shown. Since the second housing 12 is coupled to the smoke-collecting structure 25, for the purpose of description, the orientation of the second housing 12 can be consistent with and interchangeable with the orientation of the smoke-collecting structure 25. Figure 2 From the perspective of , with the smoke collecting structure 25 as a reference, the air outlet 111 of the first housing 11 is located on the right side of the range hood. In this case, the range hood 2 is preferably connected to the right public flue located on the right side of the range hood through the adapter structure 1. Figure 3 In (a), with the smoke collecting structure 25 as a reference, the air outlet 111 of the first housing 11 is located on the left side of the range hood. In this case, the range hood 2 is preferably connected to the left public flue located on the left side of the range hood through the adapter structure 1. Figure 3 In (b), taking the smoke collecting structure 25 as a reference, the air outlet 111 of the first shell 11 is located at the front side of the range hood. In this case, the range hood 2 is preferably connected to the front public flue located in front of the range hood through the adapter structure 1.

[0067] Thus, the adapter structure 1 according to the present application can achieve adaptation between the smoke collecting structure 25 whose orientation is determined by the cooking stove and the air outlet 111 whose orientation is determined by the public flue. When the orientations of the air outlet 111 and the required smoke collecting structure 25 have been determined, the adapter structure 1 according to the present application can first determine the orientation of the air outlet 111 of the first shell 11 according to the position of the public flue, and then adapt the orientation of the second shell 12 to the required orientation of the smoke collecting structure 25 by adjusting the connection between the first connecting portion 113 of the first shell 11 and the second connecting portion 122 of the second shell 12.

[0068] Optionally, in some embodiments, the side wall of the first housing 11 may define a connection port 112, and the side wall of the second housing 12 may define a connection mating port 121. Figure 1As shown, the first housing 11 may have a top wall and side walls, wherein, in the installed state, the top wall is adjacent to the ceiling / roof, and the first housing 11 is open at the bottom and surrounded by the side walls to form a connection port 112. The first housing 11 may be exemplarily in a generally cubic shape as a whole. The second housing 12 has a connection mating port 121 at the top corresponding to the connection port 112, so as to be connected to each other in a manner that the first housing 11 is on top and the second housing 12 is on the bottom.

[0069] In order to provide at least two selectable orientations, in some embodiments, the connection port 112 and the connection mating port 121 may have the same centrally symmetrical shape. For example, the centrally symmetrical shape may include but is not limited to a square, a circle, or a polygon with an even number of sides.

[0070] Additionally or alternatively, the first connection portion 113 may include a first connection unit group 114 opposite to the connection port 112, and the second connection portion 122 may include a second connection unit group 123 opposite to the connection mating port 121, wherein the first connection unit group 114 and the second connection unit group 123 have at least two connection combinations corresponding to at least two selectable orientations. Thus, by changing the connection combination between the first connection unit group 114 and the second connection unit group 123, the selectable orientation of the corresponding second housing 12 can be achieved.

[0071] Here, the number of the first connection unit group 114 and the second connection unit group 123 is not directly limited, as long as both can provide at least two connection combinations corresponding to the selectable orientations. Exemplarily, the first connection portion 113 may include at least two first connection unit groups 114 or at least two second connection unit groups 123.

[0072] Optionally, the first connection unit group 114 and the second connection unit group 123 may include corresponding through holes P, and by inserting the fixing members 13 into the corresponding through holes P, the first housing 11 is connected to the second housing 12 .

[0073] In a preferred embodiment, both the connection port 112 and the connection mating port 121 may be square. Figure 5 and Figure 7 As shown, the length of the first side of the first shell 11 is C1, the length of the adjacent second side is C2, and C1 = C2; the length of the first side of the second shell 12 is D1, the length of the adjacent second side is D2, and D1 = D2. In this case, the first connection unit group 114 and the second connection unit group 123 may each include a through hole P disposed at the midpoint of two opposite sides of the square.

[0074] Further preferably, the first connection portion 113 may have two first connection unit groups 114, and the second connection portion 122 may have only one second connection unit group 123. Figure 4 and Figure 5 The first connection portion 113 has a first first connection unit group 114 consisting of through holes P11 and P12 opposite to the connection port 112, and a second first connection unit group 114 consisting of through holes P13 and P14 opposite to the connection port 112. Figure 6 and Figure 7 , the second connection portion 122 has a second connection unit group 123 consisting of through holes P21 and P22 opposite to the connection fitting port 121. In this way, the connection between through hole P11 and through hole P21 and the connection between through hole P12 and through hole P22 can realize a selectable orientation of the second shell 12; the connection between through hole P13 and through hole P21 and the connection between through hole P14 and through hole P22 can realize a second selectable orientation of the second shell 12; and the connection between through hole P11 and through hole P22 and the connection between through hole P12 and through hole P21 can realize a third selectable orientation of the second shell 12.

[0075] Thus, by selecting different through holes P in the first connection unit group 114 and the second connection unit group 123 for connection, a variety of different connection combinations can be achieved to allow the second housing 12 to have a variety of selectable orientations.

[0076] It should be understood that the above description only exemplarily describes the connection combination of the first connection unit group 114 and the second connection unit group 123. In the present application, the number and connection combination of the first connection unit group 114 and the second connection unit group 123 can be set and adjusted according to actual needs.

[0077] Optionally, in some embodiments, Figure 7 and Figure 8 As shown, the fixing component 13 may include a head 131 and a clamping portion 132 opposite to the head 131, wherein the fixing component 13 may be configured to be able to clamp the first shell 11 and the second shell 12 between the head 131 and the clamping portion 132 in the installed state. That is, when the fixing component 13 is installed and connected to the first shell 11 and the second shell 12, the head 131 is located outside the outer side of the first shell 11 and the second shell 12 and fits with its side wall, and the clamping portion 132 is located inside the inner side of the first shell 11 and the second shell 12 and clamps with its side wall. Thus, a stable connection can be provided to the first shell 11 and the second shell 12 by the fixing component 13.

[0078] In particular, at least a portion of the fixing member 13 may be elastic. In this way, the fixing member 13 may be conveniently operated manually to engage and disengage the first housing 11 or the second housing 12, thereby facilitating the assembly of the adapter structure 1 and further facilitating the installation of the range hood 2.

[0079] When installing the range hood, each part or module is usually installed in a top-down order. Therefore, when assembling the adapter structure 1, it is also preferred to first position and install the first shell 11 with respect to the common flue, and then connect the second shell 12 to the first shell 11 from the bottom of the first shell 11. Therefore, in some embodiments, the size of the connection port 112 and the connection matching port 121 can be preferably set so that the first shell 11 can be inserted into the second shell 12. That is, see Figure 5 and Figure 7 , the side length C1 (C2) of the first shell 11 is smaller than the side length D1 (D2) of the second shell 12. In this way, the operation of connecting the second shell 12 to the first shell 11 can be made simpler and more convenient.

[0080] Additionally or alternatively, the transition structure 1 may include a circumferential sealing structure for connecting the first connection portion 113 and the second connection portion 122. In this way, the airtightness in the mating connection area between the first shell 11 and the second shell 12 can be improved, thereby preventing smoke leakage and range hood pressure relief, thereby improving smoke collection effectiveness. Exemplarily, the circumferential sealing structure may be or include a separate sealing member to be arranged between the first connection portion 113 and the second connection portion 122 when the first shell 11 and the second shell 12 are assembled.

[0081] But preferably, in some embodiments, such as Figure 4 , Figure 6 and Figures 9 to 11 As shown, the first shell 11 may have a flange 115 located at the connection port 112, and the second shell 12 may have a receiving portion 124 at the connection port 121, wherein the flange 115 may be engaged with the receiving portion 124 to form a circumferential sealing structure. Exemplarily, the arrangement of the flange 115 and the receiving portion 124 may allow the first shell 11 and the second shell 12 to have an additional fitting area at the connection area, and the additional fitting area may form a certain angle with the main extension direction of the first shell and the second shell, so as to provide sealing by using the additional fitting area.

[0082] Therefore, there is no need for a separate seal, and the corresponding circumferential seal can be achieved through the end structure design of the first shell 11 and the second shell 12. This makes the assembly of the transition structure simpler, and thus makes the assembly of the range hood simpler, and there is no need to worry about the functional stability and replacement of the separate seal during use.

[0083] Here, in the additional fitting area, the first shell 11 and the second shell 12 can form a line contact or a surface contact. In addition, the receiving portion 124 can be located on the inner surface of the side wall of the second shell 12, and can be integrated with the side wall material of the second shell 12. For example, the receiving portion 124 can be a structure welded to the inner surface of the side wall of the second shell 12. Additionally or alternatively, the flange 115 can also be integrated with the side wall material of the first shell 11. For example, the flange 115 is a part of the side wall of the first shell 11 and is bent inward by mechanical processing, or is a structure welded to the inner surface of the side wall of the first shell 11.

[0084] More preferably, if Fig.10 As shown, the flange 115 and the receiving portion 124 can both be formed in a substantially U-shape. In this way, multiple seals in multiple different directions can be achieved, thereby improving the sealing performance.

[0085] Additionally or alternatively, the flange 115 can be inserted into the receiving portion 124 from top to bottom. With this arrangement, the flange 115 and the receiving portion 124 can be engaged with each other in the process of connecting the second shell 12 to the first shell 11 from bottom to top, thereby forming a seal. This makes it possible to further simplify the assembly. In addition, the engagement of the flange 115 and the receiving portion 124 can also serve as the end point of the assembly process of the first shell 11 and the second shell 12, that is, the flange 115 can limit the relative movement of the second shell 12 relative to the first shell 11. From this point of view, the assembly can also be simplified.

[0086] The adapter structure provided in the present application can allow the range hood to be adapted to various public flues with opening directions during installation, thereby facilitating the connection between the range hood and the public flue and improving the installation flexibility of the range hood. In addition, since the air outlet 111 of the adapter structure 1 is arranged adjacent to the opening of the public flue in various situations, it is also beneficial to improve the exhaust effect of the range hood 2.

[0087] In the embodiment of the range hood 2 according to the present application, optionally, the fan 21 can be arranged in the first housing 11 of the adapter structure 1. Additionally or alternatively, as Figure 1 , Figure 2 and Fig. 9As shown, the range hood 2 may further include a flue structure 24 and a smoke collecting structure 25 connected thereto. The smoke collecting structure 25 is close to the cooking stove, and the negative pressure generated by the fan 21 will cause the smoke generated by cooking to be sucked into the smoke collecting structure 25, and then pass upward through the flue structure 24 and the fan 21 (and the volute 22) and be discharged from the air outlet 111 to the public flue. Thus, the fan 21 can be arranged at the top of the range hood 2. Such a top-mounted arrangement can keep the fan 21 away from the user, thereby effectively reducing the noise generated by the rotation of the fan 21 that the user can hear, and bringing a better cooking experience to the user.

[0088] Preferably, the flue structure 24 and the smoke collecting structure 25 are detachably connected to facilitate installation.

[0089] Further, the range hood 2 may also include a volute 22 arranged in the first housing 11, and the fan 21 may be installed in the volute 22, wherein the outlet of the volute 22 is connected to the air outlet 111 of the first housing 11, and the inlet of the volute 22 is connected to the connection port 112 of the first housing 11. Preferably, the volute 22 may be detachably installed in the first housing 11, and additionally or alternatively, the volute 22 and the fan 21, or the volute 22, the fan 21 and the first housing 11 may be provided as a whole. By arranging the volute 22, the smoke entering through the connection port 112 of the first housing 11 can be guided to the air outlet 111 and discharged into the common flue, thereby playing the role of gas collection and pressure diffusion.

[0090] Additionally or alternatively, such as Figure 3 and Figure 4 As shown, the air outlet 111 of the first housing 11 may be connected to or can be connected to a check valve 23. Exemplarily, the check valve 23 may be fixed to the first housing 11 around the air outlet 111 by a fastener (e.g., a screw). The check valve 23 is arranged at the air outlet 111 where the range hood 2 is connected to the public flue, which can effectively prevent the smoke in the public flue from flowing back into the range hood 2. Optionally, the check valve 23 may be directly connected to the public flue, or may be connected to the public flue through another connecting pipe. Here, the other connecting pipe may preferably be flexible.

[0091] The second shell 12 of the adapter structure 1 may constitute at least a part of the flue structure 24. Exemplarily, the second shell 12 may be connected to the flue structure 24. However, preferably, the second shell 12 may constitute the entire flue structure 24, so that the connection between the second shell 12 and the flue structure 24 may be eliminated. That is, one end of the second shell 12 has a connection fitting port 121 for connecting with the first shell 11, and the other end has an opening for connecting with the smoke collecting structure 25.

[0092] Considering the connection matching with both the first shell 11 and the smoke-collecting structure 25, the second shell 12 may have a cross-section with varying dimensions. Figure 1 In the embodiment shown, the cross-section of the second housing 12 is narrowed from a square to a rectangle from top to bottom. Providing a narrower flue at the far end of the range hood 2 away from the fan 21 can help increase the negative pressure at the far end and increase the suction force on the smoke.

[0093] Additionally or alternatively, the adapter structure 1 according to the present application can be adapted to various forms of smoke collecting structures 25, so that the range hood 2 can be a direct suction type, a side suction type, or a cross-border type.

[0094] It should be understood that the features and beneficial effects described above with respect to the adapter structure 1 according to the present application are also applicable to the range hood 2 according to the present application. In addition, the range hood 2 according to the present application can also have improved installation convenience and good user experience.

[0095] It is worth noting that, in this document, the expressions "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor should they be understood as implicitly indicating the number of the indicated technical features. Features defined as "first" or "second" may explicitly or implicitly indicate that at least one of the features is included.

[0096] In addition, in the description of this application, unless otherwise clearly specified and limited, the terms "installation", "connection", etc. should be understood in a broad sense, for example, it can be fixed installation / connection, detachable installation / connection, or integrated installation / connection; it can be direct installation / connection, or indirect installation / connection through an intermediate medium, or the two components can be connected internally. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. A switching structure (1) for a range hood, characterized in that: The switching structure (1) comprises a first shell (11) and a second shell (12). The first shell (11) has an air outlet (111), a connection port (112) and a first connection portion (113) located at the connection port (112); the second shell (12) has a connection matching port (121) and a second connection portion (122) located at the connection matching port (121); The connection between the first connection portion (113) and the second connection portion (122) allows the second shell (12) to be connected to the first shell (11) in one of at least two selectable orientations relative to the air outlet (111).

2. The adapter structure (1) for a range hood according to claim 1, characterized in that: The side wall of the first shell (11) defines the connection port (112), the side wall of the second shell (12) defines the connection matching port (121), and the connection port (112) and the connection matching port (121) have the same centrally symmetrical shape; and / or The transition structure (1) comprises a circumferential sealing structure for connecting the first connection portion (113) and the second connection portion (122); and / or The dimensions of the connection port (112) and the connection fitting port (121) are set so that the first housing (11) can be inserted into the second housing (12).

3. The adapter structure (1) for a range hood according to claim 1 or 2, characterized in that: The first connection portion (113) includes a first connection unit group (114) opposite to the connection port (112), and the second connection portion (122) includes a second connection unit group (123) opposite to the connection mating port (121). The first connection unit group (114) and the second connection unit group (123) have at least two connection combinations corresponding to the at least two selectable orientations.

4. The adapter structure (1) for a range hood according to claim 3, characterized in that: The first connection part (113) has two first connection unit groups (114), and the second connection part (122) has only one second connection unit group (123); and / or The first connection unit group (114) and the second connection unit group (123) include corresponding through holes (P), and the first shell (11) and the second shell (12) are connected by inserting the fixing component (13) into the corresponding through holes (P).

5. The adapter structure (1) for a range hood according to claim 4, characterized in that: The connection port (112) and the connection matching port (121) are both square, and the first connection unit group (114) and the second connection unit group (123) both include through holes (P) arranged at the midpoints of two opposite sides of the square; and / or The fixing component (13) comprises a head (131) and a clamping portion (132) opposite to the head (131), and the fixing component (13) is configured to clamp the first shell (11) and the second shell (12) between the head (131) and the clamping portion (132) in an installed state; and / or At least part of the fixing component (13) is elastic.

6. The adapter structure (1) for a range hood according to claim 2, characterized in that: The first shell (11) has a flange (115) located at the connection port (112), and the second shell (12) has a receiving portion (124) at the connection port (121), and the flange (115) can be engaged with the receiving portion (124) to form the circumferential sealing structure.

7. The adapter structure (1) for a range hood according to claim 6, characterized in that: The flange (115) and the receiving portion (124) are both formed in a substantially U-shape; and / or The flange (115) is inserted into the receiving portion (124) from top to bottom.

8. A range hood (2), characterized in that: The range hood (2) comprises a switching structure (1) according to any one of Claims 1 to 7, and the range hood (2) is connected to a common flue via the switching structure (1).

9. The range hood (2) according to claim 8, characterized in that: The fan (21) of the range hood (2) is arranged in the first housing (11) of the adapter structure (1); and / or The air outlet (111) of the first housing (11) is connected to or can be connected to a check valve (23); and / or The range hood (2) further comprises a flue structure (24) and a smoke collecting structure (25) connected thereto, and the second shell (12) constitutes at least a part of the flue structure (24); and / or The range hood (2) is of a direct suction type, a side suction type, or a crossover type.

10. The range hood (2) according to claim 9, characterized in that: The flue structure (24) is detachably connected to the smoke collecting structure (25); and / or The range hood (2) further comprises a volute (22) arranged in the first housing (11), and the fan (21) is installed in the volute (22), wherein the outlet of the volute (22) is connected to the air outlet (111) of the first housing (11), and the inlet of the volute (22) is connected to the connection port (112) of the first housing (11).

Images