Oil guide structure of range hood and range hood

Abstract

The range hood comprises a draught fan, the draught fan comprises a volute, the oil guide structure is used for being arranged below the volute so as to guide out oil in the volute, the oil guide structure comprises an oil guide piece, and the oil guide piece is provided with an oil guide flow channel penetrating in the length direction of the oil guide piece; the oil guide piece comprises a bottom wall, a first side wall, a top wall and a second side wall which are sequentially connected end to end in the circumferential direction of the oil guide piece, and at least one of the first side wall, the top wall and the second side wall is provided with a pressure relief hole communicated with the oil guide flow channel. According to the range hood, the pressure relief hole communicated with the oil guide flow channel is formed, the semi-closed oil guide flow channel is constructed, the situation that oil in the oil guide flow channel is disturbed by air generated when the range hood works can be effectively avoided, and the oil stably and smoothly enters a preset collecting device. Meanwhile, the pressure relief hole balances internal and external air pressure of the oil guide flow channel, and the situation that oil is blocked in the oil guide piece due to pressure difference and cannot flow out smoothly is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of range hoods, and in particular to an oil guide structure of a range hood and a range hood. Background Art

[0002] In modern kitchen environments, the core function of range hoods is to absorb and process the fumes generated during cooking by generating a negative pressure effect through the fan, and the fumes separated by the fan will gather in the fan's volute. In order to dispose of the oil in the volute, an oil guide structure is often set up in the range hood to guide the oil in the volute to the oil cup or oil tank to prevent the oil in the volute from dripping onto the stove or cooking container. However, the wind in the range hood can easily disturb the oil path in the oil guide structure, causing problems such as oil splashing and overflow, which is very likely to cause secondary pollution to the kitchen environment and increase the difficulty of cleaning and maintenance for users. Utility Model Content

[0003] The embodiments of the present application provide an oil guide structure of a range hood and a range hood, which can solve the technical problem that the oil path in the oil guide structure is easily disturbed by the wind in the range hood, thereby causing oil splashing and overflowing.

[0004] In a first aspect, an embodiment of the present application provides an oil guide structure of a range hood, wherein the range hood comprises a fan, wherein the fan comprises a volute, and the oil guide structure is used to be arranged below the volute to guide the oil in the volute, and the oil guide structure comprises an oil guide member, wherein the oil guide member has an oil guide channel which runs through the oil guide member along the length direction of the oil guide member, and the oil guide member comprises a bottom wall, a first side wall, a top wall and a second side wall which are connected end to end in sequence along the circumference of the oil guide member, and at least one of the first side wall, the top wall and the second side wall has a pressure relief hole connected to the oil guide channel, and the pressure relief hole is used to balance the internal and external air pressures of the oil guide channel.

[0005] Furthermore, a plurality of the pressure relief holes are arranged at intervals on the top wall of the oil guide member to ensure that the pressure of each part in the oil guide channel is balanced.

[0006] Further, the length direction of the pressure relief hole is consistent with the length direction of the oil guide member; and / or, a plurality of the pressure relief holes are arranged at equal intervals on the top wall.

[0007] Furthermore, along the oil guiding direction of the oil guiding member, the first side wall has a first oil row groove extending to its end, and / or the second side wall has a second oil row groove extending to its end. By providing the first oil row groove and the second oil row groove at the end of the oil guiding member, it is possible to avoid accumulation and blockage of oil at the end of the oil guiding member when there is too much oil, so that the oil guiding member can drain oil more smoothly.

[0008] Furthermore, the direction of the bottom wall toward the top wall is the height direction of the oil guide member, and along the height direction, the heights of the first row of oil grooves and the second row of oil grooves are not less than 4 mm, thereby preventing the first row of oil grooves and the second row of oil grooves from being too small in size, resulting in the inability to discharge the oil smoothly.

[0009] Further, the direction from the first side wall toward the second side wall is the width direction of the oil guide member, and along the width direction, the width of the oil guide member is not greater than 30 mm; and / or, the direction from the bottom wall toward the top wall is the height direction of the oil guide member, and along the height direction, the height of the oil guide member is not greater than 30 mm. It can be understood that the oil guide member is arranged in the air inlet of the range hood, and in order to prevent the oil guide member from excessively affecting the flow of wind (or smoke) in the range hood, the size of the oil guide member needs to be limited.

[0010] Furthermore, the bottom wall, the first side wall, the top wall and the second side wall are vertically connected in sequence, and the outer surface of the connection between any two of them is chamfered. The chamfering can improve the smoothness of the appearance of the oil guide component and further reduce the flow resistance of the oil guide component to the wind or smoke in the range hood.

[0011] Furthermore, the oil guide part is an oil guide pipe, which includes a first tube body and a second tube body, and the second tube body is connected to the first tube body in a telescopic manner; wherein the pressure relief hole is arranged on at least one of the first tube body and the second tube body, thereby, the length of the oil guide pipe can be adjusted by telescoping the first tube body and the second tube body, so that the oil guide pipe can be adapted to a variety of range hood body structures.

[0012] Furthermore, both the first tube body and the second tube body have the pressure relief hole, and the pressure relief hole on the first tube body and the pressure relief hole on the second tube body are at least partially connected to each other, thereby ensuring that the oil guide channel in the oil guide tube is unobstructed.

[0013] Furthermore, the oil guide structure further includes an oil receiving member and an adapter member, wherein the oil receiving member is arranged below the volute to receive the oil guided out of the volute; the adapter member is connected and communicated with the oil receiving member to receive the oil guided out of the oil receiving member; wherein the oil guide member is connected and communicated with the oil receiving member to receive the oil guided out of the oil receiving member. Thus, the oil receiving member, the adapter member and the oil guide member are sequentially connected and communicated to form a smooth oil guiding path, so that the oil in the volute can be smoothly guided out.

[0014] Furthermore, the oil receiving part includes an oil receiving pan and an oil outlet pipe, the oil receiving pan has an oil outlet hole, the oil outlet pipe is connected to the bottom surface of the oil receiving pan and communicates with the oil outlet hole, in the oil receiving part, the oil in the volute is received by the oil receiving pan, and the oil received in the oil receiving pan is discharged downward through the oil outlet pipe.

[0015] Furthermore, the volute has a main air inlet and an auxiliary air inlet, and the oil receiving chassis includes a main oil receiving plate, an auxiliary oil receiving plate and a bottom plate. The main oil receiving plate is used to be arranged close to the main air inlet, and has a main wind direction surface for guiding the airflow to the main air inlet; the auxiliary oil receiving plate is used to be arranged close to the auxiliary air inlet, and has an auxiliary wind guide surface for guiding the airflow to the auxiliary air inlet, and along the axial direction of the volute, the width of the main oil receiving plate is greater than the width of the auxiliary oil receiving plate; the bottom plate is arranged between the main oil receiving plate and the auxiliary oil receiving plate, and has the oil outlet hole. It can be understood that the width design of the main oil receiving plate and the auxiliary oil receiving plate is conducive to guiding the air below the fan to the main air inlet and the auxiliary air inlet in proportion, and can guide more airflow to the main air inlet, so that the oil smoke can maintain a smooth trajectory when flowing through the main wind direction surface and the auxiliary wind guide surface.

[0016] Furthermore, the oil receiving member further comprises a flange, which is arranged around the circumference of the whole formed by the main oil receiving plate, the auxiliary oil receiving plate and the bottom plate to jointly enclose an oil receiving space, and the flange is also used to connect with the volute. The connection between the flange and the volute ensures the stability of the connection between the oil receiving member and the oil guide structure and the range hood.

[0017] Further, the adapter includes a first adapter tube and a second adapter tube connected and communicated at an angle, the first adapter tube is connected and communicated with the oil outlet pipe, and the second adapter tube is connected and communicated with the oil guide member. In addition, in the adapter, the first adapter tube and the second adapter tube are arranged at an angle, and after adjusting the installation angle of the adapter relative to the oil receiving member, the installation angle of the oil guide member relative to the oil receiving member can be adjusted.

[0018] Furthermore, the angle between the central axis of the first transfer tube and the central axis of the second transfer tube is not less than 98° and not more than 120°. The setting of this angle range can avoid the angle between the first transfer tube and the second transfer tube being too small, resulting in poor flow of oil in the adapter, and can also avoid the angle between the first transfer tube and the second transfer tube being too large, resulting in the need to set up a longer oil guide component, thereby increasing production costs.

[0019] In a second aspect, an embodiment of the present application provides a range hood, comprising a casing, an internal fan arranged in the casing, and the oil guide structure, the fan comprising a volute and an impeller arranged in the volute, and the oil guide structure is arranged below the volute.

[0020] Based on the oil guide structure and range hood of the embodiment of the present application, the range hood includes a fan. A semi-closed oil guide channel is constructed by arranging a pressure relief hole connected to the oil guide channel on the oil guide member. This can effectively reduce or avoid the disturbance of the oil in the oil guide channel caused by the wind flow generated when the range hood is working, so that the oil can smoothly enter the predetermined collection device; at the same time, the pressure relief hole also maintains the air pressure balance inside and outside the oil guide channel, avoiding the oil from being blocked in the oil guide member due to pressure difference and being unable to flow out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 A cross-sectional schematic diagram of a range hood according to an embodiment of the present application;

[0023] Figure 2 This is a schematic structural diagram of an oil guide structure according to an embodiment of the present application;

[0024] Figure 3 This is a schematic structural diagram of a first oil receiving member according to an embodiment of the present application;

[0025] Figure 4 This is a schematic structural diagram of a second oil receiving member according to an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of an adapter according to an embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of an oil guide member according to an embodiment of the present application;

[0028] Figure 7 for Figure 6 A schematic cross-sectional view of an oil guide member;

[0029] Figure 8 This is a schematic structural diagram of a first transfer tube of the first embodiment of the present application;

[0030] Fig. 9 It is an enlarged schematic diagram of the first oil outlet pipe of the embodiment of the present application;

[0031] Fig.10 This is a schematic structural diagram of a second first transfer tube according to an embodiment of the present application;

[0032] Fig.11 It is a partially enlarged schematic diagram of the second oil outlet pipe of the embodiment of the present application;

[0033] Fig.12 This is a schematic diagram of a first installation angle of the oil guide member of an embodiment of the present application;

[0034] Fig.13 A schematic diagram of a second installation angle of the oil guide member according to an embodiment of the present application;

[0035] Fig.14 A schematic diagram of a third installation angle of the oil guide member in an embodiment of the present application;

[0036] Description of Figure Numbers:

[0037] 1. Range hood;

[0038] 10. Oil guide structure; 20. Casing; 30. Fan;

[0039] 11. Oil receiving parts; 12. Adapter parts; 13. Oil guide parts;

[0040] 111, oil receiving chassis; 112, oil outlet pipe; 113, flange;

[0041] 1110, oil outlet hole; 1111, main oil receiving plate; 1112, auxiliary oil receiving plate; 1113, bottom plate;

[0042] 121, first transfer tube; 122, second transfer tube; 1211, first limiting portion; 1221, second limiting portion;

[0043] 130, pressure relief hole; 131, bottom wall; 132, first side wall; 133, top wall; 134, second side wall;

[0044] 1320, first row of oil tanks; 1340, second row of oil tanks;

[0045] 31. Snail shell;

[0046] 4100, first buckle; 4200, first slot; 4300, first gap; 4400, second buckle; 4500, second slot; 4600, second gap;

[0047] 4110, elastic connection portion; 4120, snap-fit ​​portion; 4130, abutment position. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] Based on the technical problem that the oil circuit in the oil guide structure of the range hood is easily disturbed by the wind in the range hood, causing oil splashing and overflowing, the present application proposes an oil guide structure of the range hood and a range hood. The oil guide structure of the present application includes an oil guide member, the oil guide member has an oil guide channel that runs through the length direction of the oil guide member, the oil guide member includes a bottom wall, a first side wall, a top wall and a second side wall that are sequentially connected end to end along the circumference of the oil guide member, at least one of the first side wall, the top wall and the second side wall has a pressure relief hole connected to the oil guide channel, and the pressure relief hole is used to balance the internal and external air pressures of the oil guide channel. In the embodiment of the present application, a semi-closed oil guide channel is constructed by providing a pressure relief hole connected to the oil guide channel on the oil guide member, which can effectively prevent the wind generated when the range hood is working from disturbing the oil in the oil guide channel, so that the oil can smoothly enter the predetermined collection device. At the same time, the pressure relief hole also maintains the air pressure balance inside and outside the oil guide channel, preventing the oil from being blocked in the oil guide part due to pressure difference and being unable to flow out smoothly.

[0050] The present application is described in detail below in conjunction with specific embodiments. It should be noted that the oil guide structure according to the embodiment of the present application is not limited to being used on the range hood shown in the drawings, but can also be set on range hoods of other structures.

[0051] The present application embodiment provides a range hood 1, see Figure 1 , Figure 1 The cross-sectional schematic diagram of a range hood 1 according to an embodiment of the present application, the range hood 1 comprises an oil guide structure 10, a housing 20 and a fan 30, the fan 30 is arranged inside the housing 20, and the fan 30 comprises a volute 31 and an impeller arranged in the volute 31. In the oil guide structure 10, the oil receiving member 11 is detachably connected to the volute 31.

[0052] See also Figure 1-Figure 2 , the embodiment of the present application also provides an oil guide structure, Figure 2 The schematic diagram of the structure of an oil guide structure 10 of an embodiment of the present application, wherein the oil guide structure 10 in the embodiment of the present application is used for a range hood 1. In the embodiment of the present application, the range hood 1 includes a housing 20 and a fan 30, wherein the fan 30 is arranged inside the housing 20, and the fan 30 includes a volute 31 and an impeller arranged inside the volute 31. An oil leakage hole is provided at the bottom of the volute 31, and the high-speed rotating impeller collides with the oil smoke and throws the oil therein into the interior of the volute 31, and the oil in the volute 31 can be discharged from the oil leakage hole. The oil guide structure 10 in the embodiment of the present application includes an oil receiving part 11, a switching part 12, and an oil guide part 13.

[0053] The oil connection member 11 , the adapter member 12 and the oil guide member 13 are described below with reference to the accompanying drawings.

[0054] See also Figure 3-Figure 4 , Figure 3 This is a schematic structural diagram of a first oil receiving member 11 according to an embodiment of the present application. Figure 4 The schematic diagram of the structure of the second oil receiving member 11 of the embodiment of the present application is shown in FIG. The oil receiving member 11 is arranged below the volute 31 and is used to receive the oil discharged from the volute 31. The oil receiving member 11 includes an oil receiving pan 111, an oil outlet pipe 112 and a flange 113. The oil receiving pan 111 has an oil outlet hole 1110, and the oil outlet pipe 112 is connected to the bottom surface of the oil receiving pan 111 and communicates with the oil outlet hole 1110. It can be understood that after the oil in the volute 31 drips from the oil leakage hole to the oil receiving pan 111, it flows to the oil outlet pipe 112 through the oil outlet hole 1110.

[0055] In one embodiment of the present application, the oil receiving chassis 111 includes a main oil receiving plate 1111, an auxiliary oil receiving plate 1112 and a bottom plate 1113. It should be noted that the volute 31 has a main air inlet and an auxiliary air inlet, and the axial sides of the volute 31 respectively form the main air inlet and the auxiliary air inlet with the inner wall of the casing 20. In the oil receiving chassis 111, the main oil receiving plate 1111 is arranged close to the main air inlet and has a main guiding surface for guiding the airflow to the main air inlet, and the auxiliary oil receiving plate 1112 is arranged close to the auxiliary air inlet and has an auxiliary guiding surface for guiding the airflow to the auxiliary air inlet.

[0056] It should be noted that in the range hood 1 with double-sided air inlets, the negative pressure in the main air inlet is greater than the negative pressure in the auxiliary air inlet, and therefore, the air intake of the main air inlet is often greater than the air intake of the auxiliary air inlet. In order to better match the difference in air intake of the two air inlets, in the embodiment of the present application, along the axial direction of the volute 31, the width of the main wind guide surface is greater than the width of the auxiliary air guide surface. This design is conducive to guiding the air under the fan 30 to the main air inlet and the auxiliary air inlet in proportion, and can guide more airflow to the main air inlet. In addition, the oil smoke can maintain a smooth trajectory when flowing through the main wind guide surface and the auxiliary air guide surface, reducing the formation of turbulence and eddies, thereby reducing the flow resistance of the oil smoke. This not only helps to improve the energy efficiency of the range hood 1, but also reduces the noise generated by airflow friction.

[0057] Further, the bottom plate 1113 is disposed between the main oil receiving plate 1111 and the auxiliary oil receiving plate 1112, and the oil outlet hole 1110 is disposed on the bottom plate 1113. It is understandable that the oil outlet hole 1110 is disposed at a lower position of the bottom plate 1113 so that the oil collected on the bottom plate 1113 can flow smoothly to the oil outlet hole 1110.

[0058] Furthermore, the bottom plate 1113 is a concave structure, and can adopt a folded plate structure or a curved plate structure. In a preferred embodiment of the present application, the bottom plate 1113 adopts an arc-shaped plate, and in the vertical direction, the oil outlet 1110 is arranged at the lower part of the arc-shaped plate. It can be understood that the concave arc-shaped plate can effectively reduce the boundary layer of the oil smoke flow below the bottom plate 1113, reduce the flow resistance of the oil smoke, and facilitate the flow of the oil smoke. In addition, the oil receiving bottom plate 111 is arranged below the volute 31 to avoid the impact of smoke on the volute 31, which is conducive to reducing the operating noise of the range hood 1.

[0059] In one embodiment of the present application, the flange 113 is arranged around the top edge of the oil receiving bottom plate 111. Specifically, the flange 113 is arranged around the circumference of the whole formed by the main oil receiving plate 1111, the auxiliary oil receiving plate 1112 and the bottom plate 1113 to jointly enclose and form an oil receiving space. It is understandable that the flange 113 is also used to connect with the volute 31. In a preferred embodiment of the present application, the main oil receiving plate 1111 and the auxiliary oil receiving plate 1112 are both plate-shaped, and the top contours of the two are consistent with the outer shell contour of the volute 31. The tops of the main oil receiving plate 1111 and the auxiliary oil receiving plate 1112 extend upward to form the flange 113, and the flange 113 is fitted to the outer shell of the volute 31.

[0060] See also Figure 5 , Figure 5 The schematic diagram of the structure of an adapter 12 of an embodiment of the present application is shown, and the adapter 12 is connected to the connector of the oil receiving member 11 to receive the oil derived from the oil receiving member 11. The adapter 12 includes a first adapter tube 121 and a second adapter tube 122 connected and connected at an angle, wherein the first adapter tube 121 is connected to the oil outlet pipe 112, and the second adapter tube 122 is connected and connected to the oil guide member 13.

[0061] It can be understood that the angle between the first transfer tube 121 and the second transfer tube 122 will directly affect the smoothness of the oil guide of the adapter 12. For example, if the angle between the first transfer tube 121 and the second transfer tube 122 is too small, the oil will be easily blocked when it flows to the connection between the first transfer tube 121 and the second transfer tube 122, resulting in a decrease in flow rate and accumulation in the adapter 12. If the angle between the first transfer tube 121 and the second transfer tube 122 is too large, the length of the oil guide member 13 connected to the second transfer tube 122 will increase, thereby making the size of the oil guide structure 10 too large. In a preferred embodiment of the present application, the angle between the central axis of the first transfer tube 121 and the central axis of the second transfer tube 122 is not less than 98° and not greater than 120°.

[0062] See also Figure 6-Figure 7 , Figure 6 Schematic diagram of the structure of an oil guide member 13 according to an embodiment of the present application. Figure 7 for Figure 6 1 is a cross-sectional schematic diagram of an oil guide member 13, the oil guide member 13 is connected and communicated with the adapter 12 to receive the oil guided by the adapter 12. The oil guide member 13 is connected to the adapter 12, and one end of the oil guide member 13 away from the adapter 12 is close to the inner wall of the housing 20 to guide the oil to the inner wall of the housing 20. The oil guide member 13 can abut against the inner wall of the housing 20, or can be spaced from the inner wall of the housing 20. Specifically, the oil guide member 13 has an oil guide channel that runs through the length direction of the oil guide member 13, and the oil guide member 13 includes a bottom wall 131, a first side wall 132, a top wall 133, and a second side wall 134 that are sequentially connected end to end along the circumference of the oil guide member 13. It should be noted that, in the oil guide member 13 of the embodiment of the present application, the direction from the bottom wall 131 toward the top wall 133 is the height direction of the oil guide member 13 , and the direction from the first side wall 132 toward the second side wall 134 is the width direction of the oil guide member 13 .

[0063] In one embodiment of the present application, the bottom wall 131 , the first side wall 132 , the top wall 133 and the second side wall 134 are vertically connected in sequence, and the surfaces of the connection between the two adjacent ones are chamfered.

[0064] In one embodiment of the present application, in order to balance the internal and external air pressures of the oil guide flow channel, the oil guide member 13 also has a pressure relief hole 130. In the present application, at least one of the first side wall 132, the top wall 133 and the second side wall 134 has a pressure relief hole 130. For example, the first side wall 132 has a pressure relief hole 130, and of course, both the first side wall 132 and the second side wall 134 may have a pressure relief hole 130. In any of the above settings, the pressure relief hole 130 includes a plurality of pressure relief holes 130 arranged at intervals along the length direction of the oil guide member 13. Thus, a semi-closed oil guide flow channel can be formed on the oil guide member 13 of the present application, which can balance the internal and external pressures of the oil guide flow channel and improve the smoothness of the oil guide, and can also avoid the oil guide flow channel from being directly exposed to the air path, which is beneficial to reduce the interference of the air path in the range hood 1 with the flow of oil, thereby reducing or avoiding the occurrence of oil splashing and overflow.

[0065] Preferably, the top wall 133 has the above-mentioned pressure relief holes 130, wherein a plurality of pressure relief holes 130 are arranged at intervals on the top wall 133. In the embodiment of the present application, the pressure relief holes 130 may be arranged evenly, for example, a plurality of pressure relief holes 130 are arranged at equal intervals on the top wall 133; the pressure relief holes 130 may also be arranged unevenly, for example, a plurality of pressure relief holes 130 are arranged at variable distances on the top wall 133. In the embodiment of the present application, the pressure relief holes 130 may be holes of any profile, for example, square holes, round holes, etc. Preferably, the pressure relief holes 130 are rectangular holes, see Figure 6 The length direction of the pressure relief hole 130 is consistent with the length direction of the oil guide member 13 .

[0066] In one embodiment of the present application, in order to prevent excessive accumulation of oil at the end of the oil guide member 13 and thus block the oil guide member 13, the oil guide member 13 has an oil drain groove. Along the oil guiding direction of the oil guide member 13, the first side wall 132 has a first oil drain groove 1320 extending to its own end, that is, the end of the first side wall 132 away from the adapter 12 is recessed to form the first oil drain groove 1320. It can be understood that in the embodiment of the present application, the oil guide channel is arranged along the length direction of the oil guide member 13, so the oil guiding direction of the oil guide member 13 is also the same as the length direction of the oil guide member 13. Along the oil guiding direction of the oil guide member 13, the second side wall 134 has a second oil drain groove 1340 extending to its own end, specifically, the end of the second side wall 134 away from the adapter 12 is recessed to form the second oil drain groove 1340. Of course, the oil guide member 13 of the present application may be provided with either the first row of oil grooves 1320 or the second row of oil grooves 1340 , or may be provided with both the first row of oil grooves 1320 and the second row of oil grooves 1340 .

[0067] Furthermore, in any of the above configurations, in order to allow the oil to be smoothly discharged from the end of the oil guide member 13, the oil drain grooves in the oil guide member 13 of the present application meet the following requirements: along the height direction of the oil guide member 13, the height of the first row of oil grooves 1320 and the height of the second row of oil grooves 1340 are both not less than 4 mm. It should be noted that the height of the first row of oil grooves 1320 along the height direction of the oil guide member 13 refers to the inner groove width of the first row of oil grooves 1320, and the height of the second row of oil grooves 1340 along the height direction of the oil guide member 13 refers to the inner groove width of the second row of oil grooves 1320.

[0068] It should be noted that the oil guide member 13 is arranged obliquely in the air inlet of the range hood 1. Therefore, in order to reduce the blocking of the air inlet by the oil guide member 13 and reduce the flow resistance of the oil guide member 13, the size of the oil guide member 13 needs to be reasonably set. In a preferred embodiment of the present application, along the width direction of the oil guide member 13, the width of the oil guide member 13 is not greater than 30 mm; along the height direction of the oil guide member 13, the height of the oil guide member 13 is not greater than 30 mm.

[0069] In one embodiment of the present application, the oil guide member 13 may be an oil guide tube, and the oil guide tube has the function of adjusting its length. The oil guide tube includes a first tube body and a second tube body connected to the first tube body in a telescopic manner. In a specific implementation, the first tube body and the second tube body can be telescopically connected by a slide groove-slider. For example, a slide groove is provided on the inner wall of one of the first tube body and the second tube body. A slider is provided on the outer wall of the other tube body, and the relative sliding of the first tube body and the second tube body is achieved through the sliding connection between the slider and the slide groove to adjust the size of the oil guide tube in its length direction. Of course, the first tube body and the second tube body can also be connected in other telescopic ways.

[0070] To balance the air pressure inside and outside the oil guide pipe, a pressure relief hole 130 is provided on at least one of the first tube body and the second tube body. In a preferred embodiment of the present application, the first tube body and the second tube body both have a pressure relief hole 130, and the pressure relief hole 130 on the first tube body and the pressure relief hole 130 on the second tube body are at least partially connected to the oil guide channel.

[0071] It should be noted that the oil guide member 13 of the present application may also be of a fixed length and cannot be adjusted. In this design, in order to meet the adaptation requirements of different models of range hoods, oil guide members 13 of various lengths and specifications may be provided.

[0072] The following content will further expand the content of this application based on the connection structure between the oil receiving component 11, the adapter component 12 and the oil guiding component 13.

[0073] In the technical solution of the present application, the adapter 12 is detachably connected to at least one of the oil receiving member 11 and the oil guiding member 13, so as to facilitate the replacement of at least one of the adapter 12 and the oil guiding member 13. It can be understood that the overall size of the oil receiving member 11 in the present application is larger than that of the adapter 12 and the oil guiding member 13, and the size of the fan 30 in the range hood 1 is generally not much different, so for the sake of manufacturing cost and installation convenience, replacement of the adapter 12 or the oil guiding member 13 is given priority.

[0074] Specifically, in one embodiment of the present application, the adapter 12 is detachably connected to the oil receiving member 11 and the oil guide member 13. In this case, the adapter 12 and the oil guide member 13 can be replaced to adapt to different models of range hoods 1. In another embodiment of the present application, the adapter 12 is detachably connected to the oil receiving member 11 and is not detachably connected to the oil guide member 13. In this case, the adapter 12 and the oil guide member 13 can be replaced to adapt to different models of range hoods 1. In another embodiment of the present application, the adapter 12 is not detachably connected to the oil receiving member 11 and is detachably connected to the oil guide member 13. In this case, the adapter 12 can be replaced to adapt to different models of range hoods 1.

[0075] It should be noted that, in the embodiment of the present application, the detachable connection between the adapter 12 and the oil receiving member 11 includes at least one of a snap connection, a screw connection, and an interference fit; the non-detachable connection between the adapter 12 and the oil receiving member 11 can be any one of an integral molding, welding, and adhesive connection, or other structures that can achieve a non-detachable connection. In addition, in the embodiment of the present application, different adapters 12 have different angles. Different oil guides 13 can have different lengths.

[0076] The following further describes the detachable connection between the adapter 12 and the oil receiving member 11. It should be noted that the technical solution of the present application can adjust the installation angle of the oil guide member 13 relative to the oil receiving member 11 through the detachable connection between the adapter 12 and the oil receiving member 11.

[0077] In the present application, the adapter 12 and the oil receiving member 11 can be snap-fitted. Figure 8-Figure 11 One of the ends of the first adapter tube 121 of the adapter 12 away from the second adapter tube 122 and the oil outlet pipe 112 of the oil receiving member 11 has a first clip 4100, and the other has a first slot 4200, wherein the first clip 4100 is connected to the first slot 4200 so that the adapter 12 is clipped with the oil receiving member 11.

[0078] In an embodiment of the present application, the first buckle 4100 includes a plurality of first buckles 4100 disposed at intervals, the first slots 4200 include a plurality of first buckles 4100 disposed at intervals, and the plurality of first buckles 4100 and the plurality of first slots 4200 are disposed in one-to-one correspondence.

[0079] As a preference, Figure 8 1 is a schematic diagram of the structure of the first first transfer tube 121 according to an embodiment of the present application. Fig. 9 This is an enlarged schematic diagram of the first oil outlet pipe 112 of the embodiment of the present application, see Figure 8-Figure 9 In the first clamping structure between the first transfer tube 121 and the oil outlet pipe 112, the oil outlet pipe 112 has a first clamping groove 4200, and the first transfer tube 121 has a first buckle 4100. In the present application, the clamping deformation part is set on the first transfer tube 121. Specifically, the first transfer tube 121 also includes a first limiting part 1211, which is set between two adjacent first buckles 4100 and connected to the end of the first transfer tube 121 away from the second transfer tube 122, and a first gap 4300 is set between the first limiting part 1211 and the adjacent first buckle 4100. It can be understood that the first gap 4300 allows the first buckle 4100 to deform to a certain extent after being subjected to force, so as to disperse and relieve the stress generated by the clamping between the first transfer tube 121 and the oil outlet pipe 112. The clamping deformation part is set on the first transfer tube 121, which can also significantly reduce the damage rate of the oil outlet pipe 112 and the oil receiving member 11.

[0080] In one embodiment of the present application, the deformation of the first buckle 4100 is achieved through the elastic connection part 4110 and the buckle part 4120. The elastic connection part 4110 is connected to the end of the first transfer tube 121 away from the second transfer tube 122, and the buckle part 4120 is connected to the end of the elastic connection part 4110 away from the first transfer tube 121. In a specific implementation, before the first transfer tube 121 is snapped into place with the oil outlet pipe 112, the buckle part 4120 in the first buckle 4100 is kept against the inner wall surface of the oil outlet pipe 112, so that the elastic connection part 4110 is deformed in the wall thickness direction; after the first transfer tube 121 is snapped into place with the oil outlet pipe 112, the first buckle 4100 is snapped into cooperation with the first slot 4200, and the elastic connection part 4110 recovers its deformation.

[0081] Furthermore, the thickness of the elastic connection part 4110 is smaller than the wall thickness of the first transfer tube 121, and the inner wall surface of the elastic connection part 4110 is coplanar with the inner wall surface of the tube wall of the first transfer tube 121 connected thereto, thereby, the elastic connection part 4110 and the end surface of the first transfer tube 121 leave an abutment position 4130, wherein, after the first transfer tube 121 and the oil outlet pipe 112 are snapped into place, the abutment position 4130 abuts against one end of the oil outlet pipe 112 toward the first transfer tube 121.

[0082] In another embodiment of the present application, Fig.10 1 is a schematic diagram of the structure of the second first transfer tube 121 of the embodiment of the present application. Fig.11 This is a partial enlarged schematic diagram of the second oil outlet pipe 112 of the embodiment of the present application, see Figure 10-11 In the first clamping structure of the first adapter tube 121 and the oil outlet tube 112, the oil outlet tube 112 has a first buckle 4100, and the first adapter tube 121 has a first clamping groove 4200. In this structure, the first limiter 1211 is disposed between two adjacent first clamping grooves 4200 and connected to an end of the first adapter tube 121 away from the second adapter tube 122, and a first gap 4300 is provided between the first limiter 1211 and the adjacent first clamping groove 4200. The clamping deformation process of the second clamping structure is similar to that of the first clamping structure, and will not be described in detail here.

[0083] In one embodiment of the present application, in order to further improve the versatility of the oil guide structure 10, the oil outlet pipe 112 and the first adapter pipe 121 are both regular polygonal tubes. By switching the same first clip 4100 to engage with different first slots 4200, the installation angle of the oil guide member 13 relative to the oil receiving member 11 can be adjusted. As a result, the flexible installation of the oil guide member 13 can adapt to complex installation environments and changing usage requirements. For example, without replacing or adjusting the length of the oil guide member 13, by adjusting the installation angle of the oil guide member 13 relative to the oil receiving member 11, the oil guide member 13 can be adapted to the internal structure of the range hood 1 to be installed. As a preferred embodiment, see Figure 8-Figure 11 The oil outlet pipe 112 and the first transfer pipe 121 are both square pipes.

[0084] It can be understood that the oil outlet pipe 112 and the first transfer pipe 121 are both set as round pipes, which can also improve the versatility of the oil guide member 13. In this structure, a plurality of first buckles 4100 are evenly spaced on one of the round pipes, and a plurality of first clamping grooves 4200 are evenly spaced on the other round pipe, so that the same first buckle 4100 can be switched to be clamped with different first clamping grooves 4200.

[0085] In the present application, the adapter 12 and the oil receiving member 11 may be rotatably connected so as to be able to adjust the installation angle of the oil guiding member 13 relative to the oil receiving member 11 .

[0086] In the present application, the adapter 12 and the oil receiving member 11 can be connected by threads, for example, an internal thread is provided on the inner wall of the oil outlet pipe 112, and an external thread is provided at one end of the first adapter tube 121 away from the second adapter tube 122, wherein the external thread of the first adapter tube 121 matches and is tightened with the internal thread of the oil outlet pipe 112. By rotating the first adapter tube 121, a certain angle change can be made relative to the oil outlet pipe 112, thereby changing the installation angle of the oil guide member 13.

[0087] In the present application, the adapter 12 and the oil receiving member 11 can be connected by a snap connection and can rotate relative to each other. Specifically, the oil outlet pipe 112 and the first adapter pipe 121 are both round pipes, and one of them has a first annular groove and the other has an annular protrusion, the first annular groove and the annular protrusion are snap-fitted, and the oil outlet pipe 112 and the first adapter pipe 121 can rotate relative to each other.

[0088] In a preferred embodiment of the present application, the oil outlet pipe 112 has a first annular groove, and the first transfer pipe 121 has an annular protrusion. A clamping deformation portion can also be provided on the first transfer pipe 121. Specifically, the annular protrusion includes a plurality of arc-shaped protrusions arranged at intervals along the circumference of the first transfer pipe 121, and a second gap is provided between two adjacent arc-shaped protrusions. It can be understood that the second gap allows the arc-shaped protrusion to deform to a certain extent after being subjected to force, so as to disperse and relieve the stress generated by the clamping between the first transfer pipe 121 and the oil outlet pipe 112.

[0089] Any of the above detachable connection forms between the adapter 12 and the oil receiving member 11 can adjust the installation angle of the oil guide member 13 relative to the oil receiving member 11, such as Figure 12-14 As shown, Fig.12 This is a schematic diagram of a first installation angle of the oil guide member 13 in an embodiment of the present application. Fig.13 Schematic diagram of a second installation angle of the oil guide member 13 in the embodiment of the present application. Fig.14 This is a schematic diagram of a third installation angle of the oil guide member 13 according to an embodiment of the present application.

[0090] In the embodiment of the present application, the detachable connection method between the adapter 12 and the oil guide component 13 includes at least one of snap-on, screw-on and interference fit; the non-detachable connection between the adapter 12 and the oil guide component 13 can adopt any one of integral molding, welding and gluing, or other structures that can achieve non-detachable connection.

[0091] In one embodiment of the present application, the adapter 12 is engaged with the oil guide 13. Figure 6-Figure 8 , one of the end of the second transfer tube 122 away from the first transfer tube 121 and the oil guide member 13 has a second buckle 4400, and the other has a second slot 4500, and the second buckle 4400 is connected to the second slot 4500. In one embodiment of the present application, the end of the second transfer tube 122 away from the first transfer tube 121 may have a second slot 4500, and the oil guide member 13 may have a second buckle 4400. In a preferred embodiment of the present application, the end of the second transfer tube 122 away from the first transfer tube 121 has a second buckle 4400, and the oil guide member 13 has a second slot 4500.

[0092] As a preference, in the present application, the clamping deformation part is set on the second transfer tube 122. Specifically, the second transfer tube 122 also includes a second limiting part 1221, which is set between two adjacent second buckles 4400 and connected to one end of the second transfer tube 122 away from the first transfer tube 121. A second gap 4600 is provided between the second limiting part 1221 and the adjacent second buckle 4400. It can be understood that the second gap 4600 allows the second buckle 4400 to deform to a certain extent after being subjected to force, so as to disperse and relieve the stress generated by the clamping between the second transfer tube 122 and the oil guide member 13. The clamping deformation part is set on the second transfer tube 122, which can also significantly reduce the damage rate of the oil guide member 13.

[0093] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0094] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An oil guide structure (10) of a range hood (1), characterized in that: The range hood comprises a fan (30), the fan (30) comprises a volute (31), the oil guide structure (10) is used to be arranged below the volute (31) to guide the oil in the volute (31), and the oil guide structure (10) comprises: An oil guide member (13) has an oil guide channel that runs through the oil guide member (13) in a length direction thereof. The oil guide member (13) comprises a bottom wall (131), a first side wall (132), a top wall (133) and a second side wall (134) that are sequentially connected end to end along a circumferential direction of the oil guide member (13). At least one of the first side wall (132), the top wall (133) and the second side wall (134) has a pressure relief hole (130) that is connected to the oil guide channel. The pressure relief hole (130) is used to balance the internal and external air pressures of the oil guide channel.

2. The oil guide structure (10) according to claim 1, characterized in that: The plurality of pressure relief holes (130) are arranged at intervals on the top wall (133) of the oil guide member (13).

3. The oil guide structure (10) according to claim 2, characterized in that: The length direction of the pressure relief hole (130) is consistent with the length direction of the oil guide member (13); and / or, The plurality of pressure relief holes (130) are arranged at equal intervals on the top wall (133).

4. The oil guide structure (10) according to claim 1, characterized in that: Along the oil guiding direction of the oil guiding member (13), the first side wall (132) has a first oil drain groove (1320) extending to its own end, and / or the second side wall (134) has a second oil drain groove (1340) extending to its own end.

5. The oil guide structure (10) according to claim 4, characterized in that: The direction from the bottom wall (131) toward the top wall (133) is the height direction of the oil guide member (13), and along the height direction, the heights of the first oil drain groove (1320) and the second oil drain groove (1340) are both not less than 4 mm.

6. The oil guide structure (10) according to claim 1, characterized in that: The direction from the first side wall (132) to the second side wall (134) is the width direction of the oil guide member (13), and along the width direction, the width of the oil guide member (13) is not greater than 30 mm; and / or, The direction from the bottom wall (131) toward the top wall (133) is the height direction of the oil guide member (13), and along the height direction, the height of the oil guide member (13) is no more than 30 mm.

7. The oil guide structure (10) according to claim 1, characterized in that: The bottom wall (131), the first side wall (132), the top wall (133) and the second side wall (134) are vertically connected in sequence, and the outer surface of the connection between any two of them is chamfered.

8. The oil guide structure (10) according to claim 1, characterized in that: The oil guide member (13) is an oil guide pipe, and the oil guide pipe comprises: the first tube body; and A second tube body, connected to the first tube body in a telescopic manner; Wherein, the pressure relief hole (130) is arranged on at least one of the first tube body and the second tube body.

9. The oil guide structure (10) according to claim 8, characterized in that: The first tube body and the second tube body both have the pressure relief hole (130), and the pressure relief hole (130) on the first tube body and the pressure relief hole (130) on the second tube body are at least partially connected to each other.

10. The oil guide structure (10) according to claim 1, characterized in that: The oil guide structure (10) further comprises: An oil receiving member (11) is arranged below the volute (31) to receive the oil discharged from the volute (31); An adapter (12) is connected to and communicates with the oil receiving member (11) to receive the oil discharged from the oil receiving member (11); The oil guiding member (13) is connected to and communicates with the oil receiving member (11) and is used to receive the oil guided by the oil receiving member (11).

11. The oil guide structure (10) according to claim 10, characterized in that: The oil receiving member (11) comprises an oil receiving pan (111) and an oil outlet pipe (112); the oil receiving pan (111) has an oil outlet hole (1110); and the oil outlet pipe (112) is connected to the bottom surface of the oil receiving pan (111) and communicates with the oil outlet hole (1110).

12. The oil guide structure (10) according to claim 11, characterized in that: The volute (31) has a main air inlet and an auxiliary air inlet, and the oil receiving chassis (111) comprises: A main oil receiving plate (1111), which is arranged close to the main air inlet and has a main wind direction surface for directing airflow toward the main air inlet; an auxiliary oil receiving plate (1112) for being arranged close to the auxiliary air inlet and having an auxiliary air guide surface for guiding airflow to the auxiliary air inlet, and along the axial direction of the volute (31), the width of the main oil receiving plate (1111) is greater than the width of the auxiliary oil receiving plate (1112); and The bottom plate (1113) is arranged between the main oil receiving plate (1111) and the auxiliary oil receiving plate (1112), and has the oil outlet hole (1110).

13. The oil guide structure (10) according to claim 12, characterized in that: The oil receiving member (11) further comprises: The flange (113) is arranged around the circumference of the whole formed by the main oil receiving plate (1111), the auxiliary oil receiving plate (1112) and the bottom plate (1113) to jointly enclose and form an oil receiving space. The flange (113) is also used to connect with the volute (31).

14. The oil guide structure (10) according to claim 11, characterized in that: The adapter (12) comprises a first adapter tube (121) and a second adapter tube (122) which are connected and communicated at an angle, the first adapter tube (121) being connected and communicated with the oil outlet pipe (112), and the second adapter tube (122) being connected and communicated with the oil guide member (13).

15. The oil guide structure (10) according to claim 14, characterized in that: The angle between the central axis of the first transfer tube (121) and the central axis of the second transfer tube (122) is not less than 98° and not more than 120°.

16. A range hood (1), characterized in that: include: Housing (20); A fan (30) is arranged inside the casing (20), and the fan (30) comprises a volute (31) and an impeller arranged inside the volute (31); as well as The oil guiding structure (10) according to any one of claims 1 to 15, wherein the oil guiding structure (10) is arranged below the volute (31).

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