Oil nozzle, centrifugal fan and range hood

Abstract

The invention discloses an oil nozzle, a fan and a range hood. The oil nozzle is used for being arranged at an oil leakage hole of a volute and comprises an oil nozzle body and a shielding piece, the oil nozzle body is provided with an oil guide groove, the oil guide groove is provided with an oil receiving opening used for being communicated with the oil leakage hole and an oil outlet used for allowing fluid to flow out, and the shielding piece is connected with the oil nozzle body and shields part of the oil outlet. And an oil outlet gap communicated with the oil guide groove is formed between the shielding piece and the oil nozzle main body. According to the oil nozzle, the noise reduction effect can be achieved while oil is guided.

Description

Technical Field

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

[0002] A centrifugal fan is provided in the range hood. The oil droplets entering the range hood are gathered on the inner surface of the volute of the centrifugal fan under the action of the wind wheel 50, and are gathered to the bottom of the volute along the gravity direction. An oil leakage hole is provided at the bottom of the volute, and the oil flowing out of the oil leakage hole is collected by an oil nozzle provided on the volute.

[0003] In the related art, the oil outlet of the oil nozzle is arranged toward the main air inlet oil connection port of the fan. The airflow in the volute can leak out through the oil leakage hole and the oil outlet of the oil nozzle, disturbing the airflow near the main air inlet, causing the fan to have a large noise. Summary of the invention

[0004] The embodiments of the present application provide an oil nozzle, a centrifugal fan and a range hood, which can reduce the noise of the fan while guiding oil.

[0005] In a first aspect, an embodiment of the present application provides an oil nozzle, which is used to be arranged at an oil leakage hole of a volute, and includes:

[0006] The oil nozzle body is provided with an oil guide groove, wherein the oil guide groove has an oil receiving port for communicating with the oil leakage hole and an oil outlet for allowing the fluid to flow out; and

[0007] A shielding member is connected to the oil nozzle body and shields a portion of the oil outlet so that an oil outlet hole communicating with the oil guide groove is formed between the shielding member and the oil nozzle body.

[0008] Optionally, the shielding member at least shields at least a portion of the oil outlet close to the oil receiving port.

[0009] Optionally, the nozzle body comprises:

[0010] Directing the subject; and

[0011] Two side plates are respectively arranged on both sides of the guide body and enclose the guide body to form the oil guide groove. The shielding member connects one end of the two side plates close to the oil outlet and forms the oil outlet hole between the shielding member and at least the guide body.

[0012] Optionally, the guide body includes a guide section, the two side plates are respectively arranged on both sides of the guide section and enclosed with the guide section to form the oil guide groove, and the shielding member at least forms the oil outlet hole between the shielding member and the guide section;

[0013] The guide section is arranged opposite to the oil receiving port, and the distance between the guide section and the plane where the oil receiving port is located gradually increases in a direction approaching the oil outlet.

[0014] Optionally, the guide body further includes an extension section connected to the guide section, and the extension section is arranged on a side of the shielding member away from the oil guide groove.

[0015] Optionally, the extension section and the guide section are in the same plane;

[0016] And / or, both sides of the extension section are provided with ribs, and a gap for avoiding air is provided between the ribs and the shielding member.

[0017] Optionally, the shielding member includes two baffles, the two baffles are respectively connected to the two side plates, and are spaced from the guide body to form the oil outlet hole, and the baffle is arranged at an angle with the side plate, so that the side of the baffle away from the side plate overlaps with the other baffle or is spaced apart;

[0018] And / or, the guide body is arranged at an angle α with the plane where the oil receiving port is located, wherein 5°≤α≤20°.

[0019] Optionally, the two baffles are arranged to overlap on one side thereof, and the overlapping portion of the two baffles has a width d1 along the width direction of the oil nozzle, and the width d1 satisfies the condition: d1 ≥ 0.5 mm; or

[0020] The two baffles are spaced apart on the sides that are close to each other, and a distance d2 between the two baffles satisfies the condition: 0.5mm≤d2≤3mm.

[0021] Optionally, the nozzle body comprises:

[0022] Directing the subject; and

[0023] Two side plates are respectively arranged on both sides of the guide body and enclosed with the guide body to form the oil guide groove;

[0024] The shielding member is connected to one end of the guide body and is enclosed with at least one of the side plates to form an oil outlet hole communicating with the oil guide groove.

[0025] Optionally, the guide body and the plane where the oil receiving port is located are arranged at an angle α, and the distance between the guide body and the plane where the oil receiving port is located gradually increases in a direction approaching the oil outlet;

[0026] Among them, 6°≤α≤30°.

[0027] Optionally, at least one of the side plates is provided with an avoidance notch at one end close to the oil outlet, and the inner wall of the avoidance notch, the shielding member and the guide body define the oil outlet hole;

[0028] And / or, the side plate is arranged at an angle β with the guide body, wherein 30°≤β≤60°.

[0029] Optionally, the width of the guide body gradually decreases along the dripping direction of the oil droplets;

[0030] And / or, the width of the guide body gradually decreases along the oil guiding direction of the oil nozzle body.

[0031] Optionally, the nozzle body and / or the shielding member is provided with a fixing portion, and the fixing portion is used to be connected to the volute;

[0032] And / or, the nozzle body and the shielding member are an integrated structure;

[0033] And / or, the oil nozzle is a sheet metal part.

[0034] In a second aspect, an embodiment of the present application provides a centrifugal fan, the centrifugal fan comprising:

[0035] A volute provided with an oil leakage hole; and

[0036] The oil nozzle as described in any of the above embodiments is arranged at the oil leakage hole.

[0037] In a third aspect, an embodiment of the present application provides a range hood, the range hood comprising:

[0038] The centrifugal fan as described in the previous embodiment; and

[0039] A box body, wherein the fan is arranged in the box body.

[0040] The oil nozzle based on the embodiment of the present application can form a blockage for the airflow at the oil outlet of the oil guide groove through the covering member, thereby increasing the airflow resistance, reducing the impact of airflow leakage on the airflow near the main air outlet of the volute, and can block the propagation of noise to a certain extent, thereby playing a role in reducing noise while guiding oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] Figure 1This is a schematic structural diagram of an embodiment of a range hood of the present application;

[0043] Figure 2 This is a schematic structural diagram of an embodiment of a centrifugal fan of the present application;

[0044] Figure 3 This is a schematic structural diagram of another embodiment of the centrifugal fan of the present application;

[0045] Figure 4 for Figure 3 Side structural diagram of the centrifugal fan;

[0046] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0047] Figure 6 for Figure 2 A schematic structural diagram of an embodiment of a middle oil nozzle;

[0048] Figure 7 for Figure 2 A schematic structural diagram of another embodiment of a middle oil nozzle;

[0049] Figure 8 for Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0050] Fig. 9 for Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0051] Fig.10 for Figure 3 A schematic structural diagram of an embodiment of a middle oil nozzle;

[0052] Fig.11 for Fig. 9 A schematic diagram of the structure of the middle oil nozzle from one of the viewing angles;

[0053] Fig.12 for Fig. 9 Schematic diagram of the structure of the middle oil nozzle from another angle.

[0054] Description of Figure Numbers:

[0055] Label name Label name 1000 Range hood 13 Covering parts 100 Centrifugal fans 131 Bezel 10 Grease nozzle 15 Folding feet 11 Grease nozzle body 17 Connecting plate 11a Oil guide groove 17a First connecting hole 11b Oil port 30 Snail 11c Oil outlet 30a Main air outlet 111 Guide subject 30b Oil leak 111a Avoid gaps 50 Wind wheel 1111 Base Plate 200 Cabinet 1111a Guide section 300 Smoke collection components 1111b Extension 300a Smoke inlet 300a 1111c Edge guard 400 Oil system 1113 Sideboard 401 Oil cup 113 Side panels

[0056] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0058] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0059] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0061] Please refer to Figure 1 On the one hand, the present application proposes a range hood 1000, which is a kitchen appliance for purifying the kitchen environment. In some embodiments, the range hood 1000 includes a housing 200, a smoke collecting assembly 300 and a centrifugal fan 100, wherein the housing 200 is installed above the kitchen stove, and the centrifugal fan 100 is arranged inside the housing 200. It can be understood that the housing 200 is connected to the internal space of the smoke collecting assembly 300, and the smoke collecting assembly 300 is provided with a smoke inlet 300a connecting its internal space with the external space. When the centrifugal fan 100 is working, the waste burned by the stove and the oil smoke generated during cooking that is harmful to the human body can be quickly drawn from the smoke inlet 300a to the internal space of the range hood 1000, and discharged to the outside through the smoke outlet. At the same time, the internal space condenses and collects the oil smoke, thereby reducing pollution, purifying the air, and playing a role in anti-poison and explosion-proof safety.

[0062] It is understandable that the range hood 1000 can also be a range hood 1000 with an internal circulation function. Unlike the above-mentioned external exhaust range hood 1000, the range hood 1000 with an internal circulation function is further provided with a filter component at the smoking port or on the air duct between the smoking port and the exhaust port, which is used to filter oil smoke and odor, etc., and the exhaust port is connected to the indoor environment to blow the filtered air back into the room, and can return to the interior of the range hood 1000 through the smoking port, thereby realizing the internal circulation function.

[0063] Please refer to Figures 2 to 4 Another aspect of the present application provides a centrifugal fan 100, which includes a volute 30, a wind wheel 50 and an oil nozzle 10. The volute 30 is fixed in a box body 200. Figure 2 or Figure 3 As shown, a main air port 30a is formed on one side of the volute 30, and an air duct is also formed inside the volute 30. The wind wheel 50 is arranged inside the volute 30, and is at least partially located in the above-mentioned air duct, so that when the wind wheel 50 is working, the oil smoke exhaust gas enters the interior of the box 200 from the smoke inlet 300a of the smoke collecting assembly 300, and then enters the air duct of the volute 30 through the main air port 30a, and finally is discharged from the smoke exhaust port of the air duct. In this process, the oil smoke in the volute 30 is gathered on the inner surface of the volute 30 under the action of the wind wheel 50, and is gathered to the bottom of the volute 30 along the direction of gravity. The bottom of the volute 30 is provided with an oil leakage hole 30b, which is used to lead out the oil droplets or oil liquid at the bottom of the volute 30. It should be noted that an oil circuit system 400 for assisting in recovering oil is usually provided in the casing 200. The oil circuit system 400 includes an oil cup 401. The oil nozzle 10 is provided at the bottom of the volute 30 and at the oil leakage hole 30b, so as to further collect the oil droplets or oil leaking from the oil leakage hole 30b and guide them to the collection port of the oil circuit system 400, or the oil cup 401.

[0064] Please refer back to Figure 1 , the airflow in the volute 30 may leak out through the oil leakage hole 30b, and the leaked airflow is discharged through the oil nozzle 10, thereby disturbing the airflow near the main air port 30a, resulting in a large noise. Therefore, in order to reduce the operating noise of the centrifugal fan 100, a further aspect of the present application proposes an oil nozzle 10.

[0065] Please refer to Figures 5 to 7 The oil nozzle 10 is used to be arranged at the oil leakage hole 30b of the volute 30, and includes an oil nozzle body 11 and a shielding member 13. The oil nozzle 10 is provided with an oil guide groove 11a for collecting and guiding the oil droplets or oil leaking from the oil leakage hole 30b.

[0066] The oil nozzle 10 specifically includes a guide body 111 and two side plates 113 disposed on opposite sides of the guide body 111. The two side plates 113 and the guide body 111 together form the oil guide groove 11a. Figure 5 In the direction shown, the upper edges of the two side plates 113 and the upper edge of one side of the guide body 111 are combined to form an oil receiving port 11b, and the oil receiving port 11b is used to communicate directly or indirectly with the oil leakage hole 30b so that the oil droplets or oil leaking from the oil leakage hole 30b can enter the oil guide groove 11a from the oil receiving port 11b.

[0067] At least part of the guide body 111 is located at the bottom of the oil guide groove 11a and forms the bottom wall of the oil guide groove 11a. When the oil nozzle 10 is fixed on the volute 30, the part of the guide body 111 that forms the bottom wall of the oil guide groove 11a is tilted, so that the oil droplets or oil in the oil guide groove 11a slide or flow along the guide body 111 to one end of the guide body 111 under the action of gravity.

[0068] Optionally, the guide body 111 and the plane where the oil receiving port 11b is located are arranged at an angle α. It can be understood that when the oil nozzle 10 is installed on the volute 30, and the volute 30 is installed vertically, the angle α can also be understood as the angle between the portion of the guide body 111 that forms the bottom wall of the oil guide groove 11a and the horizontal plane. The angle α satisfies 5°≤α≤20°. If α is less than 5°, the guide body 111 is too flat, which may easily cause oil droplets or oil to accumulate in the oil guide groove 11a, resulting in low oil guide efficiency, and even causing the oil to be overfilled and leak directly; it is understandable that when the horizontal distance between the oil leakage hole 30b and the collecting port of the oil circuit system 400 or the oil cup 401 is fixed, that is, when the horizontal oil guide distance of the guide body 111 is the same, the greater the inclination angle of the guide body 111, the longer the actual length of the guide body 111 along its own length direction AA. If α is greater than 20°, it will obviously make the size of the oil nozzle 10 longer, thereby requiring more materials, resulting in higher costs and poor economic benefits; therefore, the embodiment of the present application limits 5°≤α≤20°, which can reduce the length of the oil nozzle 10 while ensuring a better oil guide effect, taking into account the manufacturing cost.

[0069] Furthermore, the width of the guide body 111 along its own width direction BB gradually decreases in the direction away from the oil receiving port 11b. It can be understood that in some embodiments, when the oil nozzle 10 is installed on the volute 30, the oil receiving port 11b is set toward the oil leakage hole 30b, and the direction away from the oil receiving port 11b is roughly the same as the direction of gravity. In other words, when the oil droplets move along the guide body 111, the space in the width direction of the oil nozzle 10 gradually narrows, forcing multiple oil droplets to get close, thereby playing a role in gathering the oil droplets, increasing the mass of a single oil droplet, and being more conducive to the movement of the oil droplets along the guide body 111, that is, having a better oil guiding effect. Of course, the guide body 111 of the embodiment of the present application can also play the same convergence role on the oil, which can improve the oil collection efficiency.

[0070] Please continue to refer to Figure 6 and Figure 7 , on the front side of the sliding direction of the oil droplets or the flow direction of the oil (illustratively, it can be the length direction AA of the guide body 111), the edge parts of the two side plates 113 and the guide body 111 are configured as an oil outlet for the fluid to flow out. The oil droplets or oil can flow out through the oil outlet and enter the collection port or oil cup 401 of the oil circuit system 400, so as to be recovered by the oil circuit system 400 or the oil cup 401. The oil outlet and the oil receiving port 11b are respectively located on different sides of the oil guide groove 11a. The two can be connected for easy production and manufacturing, or they can be disconnected for clearer functions. When disconnected, the resistance of the airflow out of the oil outlet can be increased to a certain extent, and the noise generation can be reduced. Of course, the shapes of the oil outlet and the oil receiving port 11b are not limited in the embodiments of the present application.

[0071] It is understandable that not only oil droplets or oil liquid flow out from the oil outlet, but also the airflow in the volute 30 will flow through the oil leakage hole 30b and the oil guide groove 11a and out from the oil outlet, thereby disturbing the airflow at the main air port 30a of the volute 30 and increasing the noise. Therefore, in order to reduce the leakage of airflow, in some embodiments, the shielding member 13 is connected to the oil nozzle body 11 and shields part of the oil outlet, and an oil outlet hole 11c connected to the oil guide groove 11a is constructed between the shielding member 13 and the oil nozzle body 11. Exemplarily, the oil outlet hole 11c can be set in the form of an oil outlet gap or other shapes.

[0072] Optionally, the shielding member 13 is block-shaped or plate-shaped. When viewed from the inside of the oil guide groove 11a toward the oil outlet, the shielding member 13 occupies part of the oil outlet area, which means that the gas in the oil guide groove 11a can be blocked by the shielding member 13 to a certain extent when flowing toward the oil outlet, thereby increasing the flow resistance of the airflow out of the oil outlet, thereby reducing the interference of gas leakage on the airflow near the main air outlet 30a of the volute 30, making the airflow near the main air outlet 30a of the volute 30 smoother and less noisy.

[0073] Obviously, the shielding member 13 does not affect the discharge of oil droplets or oil liquid from the oil guide groove 11 a , and the oil droplets or oil liquid can flow out of the oil guide groove 11 a through the oil outlet hole 11 c .

[0074] It is understandable that the running sound of the wind wheel 50 will also be transmitted through the oil leakage hole 30b, and the inner wall of the oil guide groove 11a can also play a certain degree of blocking on the propagation path of the above-mentioned sound, thereby reducing the radiation of the noise and achieving the effect of noise reduction. For example, in an optional embodiment, the guide body 111 includes a bottom plate 1111 and a side plate 1113 arranged at one end of the bottom plate 1111, and the side plate 1113 and the bottom plate 1111 are both connected to the side plates 113 on both sides, thereby enclosing and forming the oil guide groove 11a. Among them, the side plate 1113 has a certain height, and the side plate 1113, the two side plates 113 and the shielding member 13 are arranged around the oil leakage hole 30b, so that the oil guide groove 11a has a certain depth, which can not only better form a barrier to the airflow, but also better block the propagation of noise, and the noise reduction effect is better.

[0075] It can be seen that the oil nozzle 10 based on the embodiment of the present application can form a block to the airflow at the oil outlet of the oil guide groove 11a through the covering member 13, thereby increasing the airflow resistance, reducing the impact of airflow leakage on the airflow near the main air outlet 30a of the volute 30, and can block the propagation of noise to a certain extent, thereby playing a role in reducing noise while guiding oil.

[0076] Among them, it is optional that the nozzle body 11 and the shielding member 13 are an integrated structure, which can improve the structural integrity of the nozzle 10, reduce structural gaps, thereby avoiding liquid leakage, and has a better blocking effect on airflow and noise. At the same time, the processing efficiency is high, which is conducive to cost control.

[0077] Furthermore, the nozzle 10 is a sheet metal part. The embodiment of the present application uses metal parts to process and manufacture the nozzle 10. On the one hand, the nozzle 10 can have good stability and toughness to ensure structural strength. On the other hand, the nozzle 10 is formed by processing the metal plate, which has high processing efficiency.

[0078] To ensure the noise reduction effect, in some embodiments, the shielding member 13 shields at least a portion of the oil outlet near the oil receiving port 11b. Figure 6 and Figure 7According to the direction shown in the figure, the oil receiving port 11b is located above the oil guide groove 11a, the oil outlet is located on the side of the oil guide groove 11a, the oil receiving port 11b is arranged toward the oil leakage hole 30b, and at least part of the area of ​​the oil outlet near the oil receiving port 11b is blocked by the shielding member 13, that is, the shielding member 13 at least blocks part of the area above the oil outlet itself, so that the shielding member 13, the side plate 113 and the bottom plate 1111 or the side plate 1113 of the guide body 111 together construct a roughly annular blocking structure around the oil receiving port 11b. When the oil nozzle 10 is connected to the volute 30, the above-mentioned blocking structure cooperates with the outer surface of the bottom of the volute 30 to form a relatively closed space, thereby maintaining at least part of the airflow in the space and reducing airflow leakage.

[0079] Please refer to Figure 6 or Figure 7 , the nozzle body 11 is provided with a fixing part for connecting with the volute 30. Exemplarily, the fixing part may include a connecting plate 17 provided at one end of the guide body 111 and a folding foot 15 provided at the upper edge of the side plate 113, the connecting plate 17 is provided with a plurality of first connecting holes 17a, the folding foot 15 is spaced apart from the connecting plate 17, and a plug-in end is provided on the side of the folding foot 15 away from the connecting plate 17. Correspondingly, a plug-in interface and a second connecting hole are provided at the bottom of the volute 30. When assembling the nozzle 10, the plug-in end may be inserted into the plug-in interface first, and then the first connecting hole 17a on the connecting plate 17 may be aligned with the second connecting hole of the volute 30, and the connecting plate 17 may be fixedly connected with the volute 30 by fasteners such as bolts, so that the assembly is convenient and quick.

[0080] In order to improve the connection stability, the two side plates 113 of the nozzle body 11 are both provided with folding feet 15 so as to connect the volute 30 through the cooperation of the two folding feet 15 and the connecting plate 17 .

[0081] Specifically, the shielding member 13 is roughly plate-shaped, spanning the oil outlet and connected to the ends of the side plates 113 on both sides of the oil outlet. The bottom of the shielding member 13 is spaced apart from the bottom plate 1111 of the guide body 111, and an oil outlet hole 11c is formed between the two. It can be understood that the oil droplets or oil entering the oil guide groove 11a from the oil leakage hole 30b can flow along the guide body 111 to the oil outlet hole 11c and flow out from the oil outlet hole 11c. The shielding member 13 at least blocks a part of the area above the oil outlet. Therefore, the shielding member 13 is relatively closer to the oil receiving port 11b in the height direction CC, and can block the airflow flowing out of the oil leakage hole 30b.

[0082] Please continue to refer to Figure 5 or Figure 7Optionally, the guide body 111 includes a connected guide section 1111a and an extension section 1111b, two side plates 113 are respectively arranged on both sides of the guide section 1111a, and enclosed with the guide section 1111a to form an oil guide groove 11a, and the above-mentioned oil outlet 11c is formed between the shielding member 13 and the guide section 1111a. In this embodiment, the guide section 1111a is arranged opposite to the oil receiving port 11b, and the distance between the guide section 1111a and the plane where the oil receiving port 11b is located gradually increases along the direction close to the oil outlet, that is, the closer to the direction of the oil outlet 11c, the deeper the depth of the oil guide groove 11a along the height direction CC. Therefore, when the oil nozzle 10 is installed on the volute 30, and the volute 30 is installed vertically, the guide section 1111a is inclined relative to the horizontal plane to facilitate guiding the oil droplets or oil in the oil guide groove 11a.

[0083] Please return to combine Figure 1 The range hood 1000 has a front side and a rear side. For example, the front side is the side of the range hood 1000 facing the user, and the rear side is the side of the range hood 1000 facing away from the user. In some embodiments, the centrifugal fan 100 is usually arranged near the front side, and the oil circuit system 400 is arranged on the rear back plate of the housing 200 of the range hood 1000, and an oil circuit connected to the oil cup 401 is formed. Obviously, the oil leakage hole 30b is still a distance away from the collecting port or the oil cup 401 of the oil circuit system 400, so in some embodiments, the extension section 1111b is arranged on the side of the shielding member 13 away from the oil guide groove 11a, so that the oil droplets or oil flowing out of the oil outlet hole 11c can flow along the extension section 1111b for a distance, thereby entering the collecting port or the oil cup 401 of the oil circuit system 400.

[0084] It can be understood that when the oil nozzle 10 is installed on the volute 30, the extension section 1111b is also tilted to guide the oil droplets or oil. Furthermore, the extension section 1111b and the guide section 1111a are in the same plane, which means that the extension section 1111b is well connected with the guide section 1111a while ensuring the oil guiding effect and cost, so as to avoid the oil or oil droplets from getting stuck at the connection between the extension section 1111b and the guide section 1111a.

[0085] Furthermore, in order to prevent oil or oil droplets from falling from both sides of the extension section 1111b, ribs 1111c are provided on the opposite sides of the extension section 1111b.

[0086] Please refer to Figures 6 to 9In some embodiments, the shielding member 13 may be a whole plate, at least one end of which is connected to the side plate 113. Of course, the shielding member 13 may also include two baffles 131, which are respectively connected to the two side plates 113 and are spaced apart from the guide body 111 to form the oil outlet 11c; wherein the baffle 131 is arranged at an angle to the side plate 113, so that the side of the baffle 131 away from the side plate 113 overlaps with the other baffle 131 (such as Figure 8 as shown) or interval settings (as shown Fig. 9 shown).

[0087] In an optional form, the oil nozzle 10 is processed from a piece of metal plate, and the plates on both sides of the guide body 111 are formed into two side plates 113 through a bending process. Part of the plate at the front end of each side plate 113 is bent toward the other side plate 113 on the opposite side by approximately 90 degrees (of course, other angles are also possible) through a bending process, thereby forming a baffle 131, which is convenient for production and processing.

[0088] Furthermore, in this embodiment, the guide body 111 is provided with an extension section 1111b, and the plates on both sides of the extension section 1111b are formed into retaining edges 1111c through a bending process, and a gap 111a is provided between the retaining edge 1111c and the shielding member 13, so as to facilitate the bending of part of the plate at the front end of the side plate 113 to form the baffle 131. It can be understood that before the part of the plate at the front end of the side plate 113 is bent to form the baffle 131, the baffle 131 and the extension section 1111b, etc., need to be formed on the plate through a process such as punching, and the part of the retaining edge 1111c close to the baffle 131 is cut off during processing to form the gap 111a. The punching die here is thicker and has a higher die strength, which can improve the life of the die and the manufacturing economy. In addition, the provision of the gap 111a is also conducive to the bending of the baffle 131 and improves the processing efficiency.

[0089] For example, please refer to Figure 8 The two baffles 131 are partially overlapped on one side thereof, which can ensure the processing convenience while strengthening the strength of the middle part of the shielding member 13, which is conducive to improving stability and more comprehensively blocking the leakage of airflow. The overlapping part of the two baffles 131 has a width d1 along the width direction of the nozzle 10. Optionally, the width d1 satisfies the condition: d1 ≥ 0.5 mm. It can be understood that if d1 < 0.5 mm, the overlap length of the two baffles 131 is not long enough, and the effect of effectively enhancing and improving stability cannot be achieved.

[0090] Alternatively, please refer to Fig. 9, the two baffles 131 are spaced apart on the side close to each other, and the spacing d2 between the two baffles 131 satisfies the condition: 0.5mm≤d2≤3mm. It can be understood that if d2<0.5mm, the processing precision is higher and the cost is higher. If d2>3mm, the gap between the two baffles 131 is too large, and it cannot play a good role in blocking airflow and noise. The embodiment of the present application is limited to 0.5mm≤d2≤3mm, taking into account both cost and noise reduction effect.

[0091] In addition, as another optional implementation, when the oil is more, the gap between the two baffles 131 can also be set to be larger so as to play the same role as the oil outlet hole 11c.

[0092] Please refer to Fig.10 In another specific embodiment of the present application, the fixing portion includes a folding foot 15 provided at one end of the guide body 111 and a connecting plate 17 provided at the end of the shielding member 13 away from the guide body 111. The shielding member 13 is connected to the other end of the guide body 111, and is enclosed with at least one side plate 113 to form an oil outlet 11c connected to the oil guide groove 11a. The folding foot 15 is provided with a plug-in end. During assembly, the plug-in end can be first inserted into the plug-in interface of the volute 30, and then the connecting plate 17 is connected to the volute 30 by a buckle or a threaded fastener. In this way, the shielding member 13 of this embodiment is directly connected to the volute 30, which also means that the shielding member 13 is close to the oil receiving port 11b, and can achieve a relatively ideal blocking of the airflow near the oil leakage hole 30b.

[0093] In a possible implementation, the oil nozzle 10 is processed from a whole plate, and the part of the plate connected to the guide body 111 is bent to form the shielding member 13. Depending on the actual situation, in some range hoods 1000 where the oil leakage hole 30b is closer to the collection port or the oil cup 401 of the oil system 400, the length of the guide body 111 can be appropriately reduced to match the distance between the oil leakage hole 30b and the collection port or the oil cup 401.

[0094] Optionally, see Fig.11 The guide body 111 is set at an angle α with the plane where the oil receiving port 11b is located, and along the direction approaching the oil outlet, the distance between the guide body 111 and the plane where the oil receiving port 11b is located gradually increases, that is, the depth of the oil guide groove 11a gradually increases. Therefore, when the oil nozzle 10 is installed on the volute 30 and the volute 30 is installed vertically, the guide body 111 is set at an angle to guide the oil droplets or oil in the oil guide groove 11a.

[0095] The angle α satisfies: 6°≤α≤30°. Figure 6The extension section 1111b shown in or 7 can adapt to the situation where the horizontal spacing between the oil leakage hole 30b and the collecting port or the oil cup 401 is small. When the horizontal spacing is small, setting the angle α to 6°≤α≤30 can further accelerate the discharge speed of oil droplets or oil, improve efficiency and avoid accumulation. When the horizontal distance between the oil leakage hole 30b and the collecting port or the oil cup 401 of the oil circuit system 400 is fixed, if α<6°, the guide body 111 is too flat, which may easily cause oil droplets or oil to accumulate in the oil guide groove 11a, resulting in low oil guide efficiency, and even causing the oil to be overfilled and leak directly; it is understandable that when the horizontal distance between the oil leakage hole 30b and the collecting port or the oil cup 401 of the oil circuit system 400 is fixed, that is, when the horizontal oil guide distance of the guide body 111 is the same, the greater the inclination angle of the guide body 111, the longer the actual length of the guide body 111 along its own length direction AA. If α>30°, it will obviously make the size of the oil nozzle 10 longer, thereby requiring more materials, resulting in higher costs and poor economic benefits; therefore, the embodiment of the present application limits 6°≤α≤30°, which can reduce the length of the oil nozzle 10 while ensuring a better oil guide effect, taking into account the manufacturing cost.

[0096] Of course, when the horizontal distance between the oil leakage hole 30b and the collecting port or the oil cup 401 is relatively large, the guide body 111 can also be provided with an extension section 1111b by welding or the like to extend the oil guiding distance of the guide body 11.

[0097] Please refer to Fig.12 In some embodiments, the side plate 113 and the guide body 111 are arranged at an angle β, wherein the angle β satisfies 30°≤β≤60°. It can be understood that when the nozzle 10 is connected to the volute 30, there is a gap between the upper edge of the nozzle 10 and the volute 30, and the gas flowing out of the oil leakage hole 30b may also flow out from the gap. If β<30°, the length of the gap is too long, and the gas leaks too much, which is not conducive to the noise reduction design; if β>60°, the space of the receiving groove may be too small, and the tolerance of the airflow is not strong, which is also not conducive to noise reduction. If the side plate 113 and the guide body 111 are an integral plate, a too large bending angle may cause structural damage.

[0098] Please refer to Figures 10 to 12Optionally, oil droplets or oil liquid moves along the guide body 111 and gathers at the junction of the guide body 111 and the shielding member 13. At least one end of the side plate 113 close to the oil outlet is provided with an avoidance gap, and the avoidance gap is provided at the bottom of the side plate 113. The inner wall of the avoidance gap, the shielding member 13 and the guide body 111 define an oil outlet hole 11c, which can allow oil droplets or oil liquid to flow out of the oil outlet hole 11c. To improve efficiency, both side plates 113 are provided with avoidance gaps so that both sides of the shielding member 13 are provided with oil outlet holes 11c. In addition, the side plate 113 is set at an angle β with the guide body 111. The inclined side plate 113 can make the oil outlet hole 11c more three-dimensional, and can guide the oil droplets and oil liquid out of the oil outlet hole 11c to a certain extent, which is beneficial to improving the oil outlet efficiency.

[0099] It is understandable that the above are some possible implementations of the nozzle 10 of the present application. On this basis, the present application does not limit the connection position of the fixing portion, and the fixing portion can also be provided on the shielding member 13, so that the nozzle 10 is connected to the volute 30 through the fixing portion. The present application also does not limit the material of the nozzle 10, which can be a plastic material with higher strength in addition to a metal material.

[0100] In some embodiments, please refer back to Figure 4 According to the installation method shown in the figure, the oil outlet of the oil nozzle 10 is set to face away from the main air port 30a of the volute 30. In this way, the airflow in the oil nozzle 10 needs to travel a longer distance to reach the vicinity of the main air port 30a, and the disturbance to the airflow near the main air port 30a is smaller, making the airflow near the main air port 30a smoother and less noisy.

[0101] The specific structure of the oil nozzle 10 of the centrifugal fan 100 in the embodiment of the present application refers to the above embodiment. Since the centrifugal fan 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0102] Similarly, the specific structure of the centrifugal fan 100 of the range hood 1000 of the embodiment of the present application refers to the above embodiment. Since the centrifugal fan 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0103] 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 "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0104] The above are only preferred embodiments of the present application and are 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 nozzle, used to be arranged at the oil leakage hole of a volute, characterized in that: The oil nozzle comprises: The oil nozzle body is provided with an oil guide groove, wherein the oil guide groove has an oil receiving port for communicating with the oil leakage hole and an oil outlet for allowing the fluid to flow out; and A shielding member is connected to the oil nozzle body and shields a portion of the oil outlet so that an oil outlet hole communicating with the oil guide groove is formed between the shielding member and the oil nozzle body.

2. The grease nozzle according to claim 1, characterized in that: The shielding member at least shields at least a portion of the oil outlet close to the oil receiving port.

3. The grease nozzle according to claim 1, characterized in that: The nozzle body comprises: Directing the subject; and Two side plates are respectively arranged on both sides of the guide body and enclose the guide body to form the oil guide groove. The shielding member connects one end of the two side plates close to the oil outlet and forms the oil outlet hole between the shielding member and at least the guide body.

4. The grease nozzle according to claim 3, characterized in that: The guide body comprises a guide section, the two side plates are respectively arranged on both sides of the guide section and enclosed with the guide section to form the oil guide groove, and the shielding member at least forms the oil outlet between the shielding member and the guide section; The guide section is arranged opposite to the oil receiving port, and the distance between the guide section and the plane where the oil receiving port is located gradually increases in a direction approaching the oil outlet hole.

5. The grease nozzle according to claim 4, characterized in that: The guide body further comprises an extension section connected to the guide section, and the extension section is arranged on a side of the shielding member away from the oil guide groove.

6. The grease nozzle according to claim 5, characterized in that: The extension section and the guide section are in the same plane; And / or, both sides of the extension section are provided with ribs, and a gap for avoiding air is provided between the ribs and the shielding member.

7. The grease nozzle according to claim 3, characterized in that: The shielding member includes two baffles, the two baffles are respectively connected to the two side plates, and are spaced from the guide body to form the oil outlet hole, and the baffles are arranged at an angle with the side plates so that the two baffles are overlapped or spaced on the sides close to each other; And / or, the guide body is arranged at an angle α with the plane where the oil receiving port is located, wherein 5°≤α≤20°.

8. The grease nozzle according to claim 7, characterized in that: The two baffles are arranged to overlap on one side facing each other, and the overlapping portion of the two baffles has a width d1 along the width direction of the oil nozzle, and the width d1 satisfies the condition: d1 ≥ 0.5 mm; or The two baffles are spaced apart on the sides that are close to each other, and a distance d2 between the two baffles satisfies the condition: 0.5mm≤d2≤3mm.

9. The grease nozzle according to claim 1, characterized in that: The nozzle body comprises: Directing the subject; and Two side plates are respectively arranged on both sides of the guide body and enclosed with the guide body to form the oil guide groove; The shielding member is connected to one end of the guide body and is enclosed with at least one of the side plates to form an oil outlet hole communicating with the oil guide groove.

10. The grease nozzle according to claim 9, characterized in that: The guide body and the plane where the oil receiving port is located are arranged at an angle α, and the distance between the guide body and the plane where the oil receiving port is located gradually increases along the direction approaching the oil outlet hole; Wherein, the angle α satisfies: 6°≤α≤30°.

11. The grease nozzle according to claim 9, characterized in that: At least one of the side plates is provided with an avoidance notch at one end close to the oil outlet, and the inner wall of the avoidance notch, the shielding member and the guide body define the oil outlet hole; And / or, the side plate and the guide body are arranged at an angle β, wherein the angle β satisfies: 30°≤β≤60°.

12. The grease nozzle according to claim 3 or 9, characterized in that: The width of the guide body gradually decreases along the dripping direction of the oil droplets; And / or, the width of the guide body gradually decreases along the oil guiding direction of the oil nozzle body.

13. The grease nozzle according to any one of claims 1 to 11, characterized in that: The nozzle body and / or the shielding member are provided with a fixing portion, and the fixing portion is used to be connected to the volute; And / or, the nozzle body and the shielding member are an integrated structure; And / or, the oil nozzle is a sheet metal part.

14. A centrifugal fan, characterized in that: include: The volute is provided with an oil leakage hole; and The oil nozzle according to any one of claims 1 to 13, arranged at the oil leakage hole.

15. A range hood, characterized in that: include: The centrifugal fan according to claim 14; and A box body, wherein the fan is arranged in the box body.

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