Oil fume fan with self-cleaning function

Abstract

The utility model discloses an oil smoke fan with a self-cleaning function. The oil smoke fan comprises a volute, an impeller, a motor, a fastening disc, a locking sheet and a cleaning liquid spraying module, the cleaning liquid spraying module is arranged on one side of the volute and used for spraying cleaning liquid to the impeller, and the motor is used for driving the impeller to rotate bidirectionally; the fastening disc comprises a chassis body, an annular shaft sleeve and a holding rotating disc arranged at the upper end of the annular shaft sleeve; a locking hole is formed in the holding rotating disc; an output shaft of the motor penetrates through a central hole of the fixed disc, the fastening disc is sleeved on the output shaft to be screwed, and the chassis body is fixed with the fixed disc; the locking piece comprises a limiting hole and a plurality of locking holes surrounding the limiting hole. The fastener penetrates through the locking hole and the locking hole to realize fixation; the motor drives the impeller to rotate towards a first direction which is the same as the bending direction of the blades to realize an oil smoke extraction function, and drives the impeller to rotate towards a second direction which is the same as the bending direction of the blades to realize a self-cleaning function in a cleaning liquid spraying state.

Description

Technical Field

[0001] The utility model relates to the technical field of oil fume fan systems, in particular to an oil fume fan with a self-cleaning function. Background Art

[0002] In the kitchen, the emission of oil smoke is an unavoidable problem. While traditional range hoods can extract some oil smoke, over time, a large amount of oil will accumulate inside the impeller and air duct. This not only affects kitchen hygiene but can also damage the performance and lifespan of the range hood. Therefore, regular cleaning and maintenance are necessary, but this process is often time-consuming and labor-intensive, and frequent disassembly can affect the machine's accuracy and lifespan. To address this issue, self-cleaning range hood blower technology has emerged, aiming to reduce the need for manual cleaning through automation, improving kitchen hygiene and equipment efficiency.

[0003] In this field, there are already a number of patented technologies dedicated to improving the performance of self-cleaning range hood fans. For example, the utility model patent with authorization announcement number CN206988151U discloses a self-cleaning fan and a range hood using the fan. This technology realizes the automatic cleaning of the impeller by integrating a liquid storage tank, a water pump and a control panel into the fan. Its technical abstract describes a self-cleaning fan with an innovative nozzle design. The nozzle is set obliquely to the impeller, which can effectively clean the oil between the blades and ensure smooth ventilation. At the same time, the rotation of the motor is used to achieve comprehensive cleaning of the impeller and the inner wall of the casing, and the cleaning liquid is discharged through the oil leakage port, thereby greatly improving the cleaning efficiency and the service life of the equipment.

[0004] Another patent, application publication number CN105509117A, relates to a self-cleaning fan and range hood, as well as a cleaning method. This patent document incorporates a heating element between the inner and outer shells of the fan housing to achieve self-cleaning of the range hood through heating. This eliminates the need for disassembly and cleaning, extends the life of the heating element, and mitigates the risk of fire caused by oil contamination.

[0005] Patent application publication number CN102465927A proposes a range hood fan with a self-cleaning function. By providing a cleaning liquid container and a dirty water pipe, the fan automatically cleans, effectively solving the problem of kitchen fume pollution. Patent application publication number CN202326433U describes a range hood fan structure with an automatic cleaning function. By installing a three-way and reversing valve at the bottom of the volute, the impeller and volute are automatically cleaned, greatly reducing the workload and time of manual cleaning.

[0006] For these fume fans, the motor rotates unidirectionally to extract the fume, and self-cleaning with clean water often only removes the oil on the impeller surface, but cannot penetrate deep into the impeller or the volute. This self-cleaning method is not ideal for long-term accumulation and stubborn oil stains, which limits the fan's cleaning efficiency and service life. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a fume fan with a self-cleaning function, which has a stable structure and a better self-cleaning effect.

[0008] The technical solution adopted by the utility model to solve the above technical problems is: a range hood fan with a self-cleaning function, characterized by comprising a volute, an impeller, a motor, a fastening plate, a locking plate and a cleaning liquid spraying module; the cleaning liquid spraying module is arranged on one side of the volute, for spraying cleaning liquid onto the impeller, and the motor is used to drive the impeller to rotate in both directions;

[0009] The impeller includes a plurality of blades spaced circumferentially and extending axially parallel, and a wheel carrier, wherein the blades are bent from inner edges to outer edges in a first direction, and the wheel carrier includes a fixing plate; the motor includes a motor body and an output shaft, wherein the output shaft includes an external thread section and a smooth section, and the external thread section has a section;

[0010] The fastening disc includes a chassis body, an annular sleeve, and a gripping rotating disc provided at the upper end of the annular sleeve; the axial hole of the annular sleeve includes a straight hole section and an internal thread section, the aperture of the internal thread section is smaller than that of the straight hole section, and the gripping rotating disc is provided with a locking hole;

[0011] The motor body is fixed to the volute, the output shaft passes through the central hole of the fixed plate, the fastening plate is sleeved on the output shaft, the internal thread section is screwed with the external thread section, and the chassis body is fixed to the fixed plate;

[0012] The locking plate includes a limiting hole matching the profile of the external thread segment and a plurality of locking holes surrounding the limiting hole; the external thread segment passing through the grip rotating disk passes through the limiting hole, and the fastener passes through the locking hole and the locking hole to achieve fixation;

[0013] The motor drives the impeller to rotate in a first direction which is the same as the bending direction of the blades to realize the fume extraction function, and the motor drives the impeller to rotate in a second direction which is the same as the bending direction of the blades to realize the self-cleaning function in a cleaning liquid spraying state.

[0014] The preferred technical solution adopted by the present invention to solve the above technical problems is: the locking holes are arc-shaped long holes spaced apart from each other, the limiting head of the fastener is clamped on the outside of the arc-shaped long hole, and the number of the locking holes is less than or equal to the locking holes.

[0015] The preferred technical solution adopted by the present invention to solve the above technical problems is: the number of the arc-shaped long holes is 3, and the arc angle range is 90-110°.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problems is: the output shaft of the output shaft is provided with a transverse positioning hole, the bottom of the fastening disk is provided with a positioning channel, the positioning shaft passes through the transverse positioning hole and is inserted into the positioning channel of the fastening disk to realize a limited connection.

[0017] The preferred technical solution adopted by the present invention to solve the above technical problems is: a stepped protrusion is provided at the bottom of the fastening plate, and the positioning channel is provided on the end surface of the stepped protrusion.

[0018] The preferred technical solution adopted by the present invention to solve the above technical problems is: the stepped protrusion includes a small cylindrical portion on the outside and a large cylindrical portion on the inside; the central hole is a through hole corresponding to the outer diameter of the large cylindrical portion; the stepped protrusion passes through the central hole, the fixed disk is located at the small cylindrical portion, and the large cylindrical portion extends out of the fixed disk.

[0019] The technical solution adopted by the utility model to solve the above technical problems is as follows: a range hood fan with a self-cleaning function includes a volute, an impeller, a motor, a fastening plate, a locking plate and a cleaning liquid spray module; the cleaning liquid spray module is arranged on one side of the volute, and is used to spray cleaning liquid onto the impeller, and the motor is used to drive the impeller to rotate in both directions;

[0020] The impeller includes a plurality of blades distributed circumferentially and extending axially in parallel, and a wheel frame, wherein the blades are bent from the inner edge to the outer edge in a first direction, and the wheel frame includes a fixed disk; the motor includes a motor body and an output shaft;

[0021] The fastening plate includes a chassis body, an annular sleeve and a gripping rotating plate provided on the upper end of the annular sleeve;

[0022] The motor body is fixed to the volute, the output shaft passes through the central hole of the fixed plate, the fastening plate is sleeved on the output shaft, the output shaft is screwed with the annular sleeve, and the chassis body is fixed to the fixed plate;

[0023] The end of the output shaft is provided with a cut surface, and the locking plate includes a limiting hole matching the contour of the end of the output shaft and a plurality of locking holes surrounding the limiting hole; a fastener passes through the locking hole and the locking hole on the end surface of the grip rotating disk to achieve fixation;

[0024] The motor drives the impeller to rotate in a first direction which is the same as the bending direction of the blades to realize the fume extraction function, and the motor drives the impeller to rotate in a second direction which is the same as the bending direction of the blades to realize the self-cleaning function in a cleaning liquid spraying state.

[0025] The preferred technical solution adopted by the present invention to solve the above technical problems is: the output shaft includes an external thread section and a smooth section, and the external thread section has a cross-section; the shaft hole of the annular sleeve includes a straight hole section and an internal thread section, and the aperture of the internal thread section is smaller than that of the straight hole section; the output shaft of the output shaft is provided with a transverse positioning hole, and the bottom of the fastening disk is provided with a positioning channel, and the positioning shaft passes through the transverse positioning hole and is penetrated into the positioning channel of the fastening disk to realize a limited connection.

[0026] The preferred technical solution adopted by the present invention to solve the above technical problems is: the locking holes are arc-shaped long holes spaced apart from each other, the limiting head of the fastener is clamped on the outside of the arc-shaped long hole, and the number of the locking holes is less than or equal to the locking holes.

[0027] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: a step-shaped protrusion is provided at the bottom of the fastening disk; the step-shaped protrusion includes a small cylindrical portion on the outside and a large cylindrical portion located on the inside; the central hole is a through hole corresponding to the outer diameter of the large cylindrical portion; the step-shaped protrusion passes through the central hole, the fixing disk is located at the small cylindrical portion, and the large cylindrical portion extends out of the fixing disk.

[0028] Compared with the prior art, the advantages of the present invention are: during cleaning, the impeller rotates in a second direction in the same direction as the bending direction of the blades, which makes it easier to throw out oil stains, thereby improving the self-cleaning ability; the locking plate tightens the connection between the fastening disk and the motor, limiting the reverse rotation of the two, thereby preventing loosening.

[0029] The locking holes are arc-shaped long holes spaced apart from each other, so that the locking pieces are aligned with the adaptable holes of the gripping rotating disk during processing, making the operation more convenient and improving the convenience of automated operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0031] Figure 1 Schematic diagram of a range hood fan with self-cleaning function Figure 1 ;

[0032] Figure 2 Schematic diagram of a range hood fan with self-cleaning function Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the impeller of a range hood fan with a self-cleaning function;

[0034] Figure 4 This is an enlarged view of the central part of the impeller of the range hood fan with self-cleaning function;

[0035] Figure 5 Schematic diagram of the fastening plate of the range hood fan with self-cleaning function Figure 1 ;

[0036] Figure 6 Schematic diagram of the fastening plate of the range hood fan with self-cleaning function Figure 2 ;

[0037] Figure 7 Schematic diagram of the assembly structure of some components of a range hood fan with self-cleaning function Figure 1 ;

[0038] Figure 8 Schematic diagram of the assembly structure of some components of a range hood fan with self-cleaning function Figure 2 ;

[0039] Figure 9 This is a schematic diagram of the locking piece of a range hood fan with a self-cleaning function. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0041] It should be noted that like reference numerals denote like items in the following drawings, and therefore, once an item is defined in one drawing, it will not be further defined or explained in the subsequent drawings.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "back," "left," "right," "inner," and "outer" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used solely to facilitate understanding and have no other directional meanings, and should not be construed as limitations on this utility model.

[0043] like Figure 1-2 As shown, this embodiment provides a range hood blower with a self-cleaning function, comprising a volute 1, an impeller 2, a motor 3, a fastening plate 4, a locking plate 5, and a cleaning liquid spray module. The cleaning liquid spray module can be configured in a variety of ways. It is located on one side of the volute 1 and is used to spray cleaning liquid toward the impeller 2. For example, a high-pressure nozzle can be introduced, aimed at the impeller 2. The motor 3 is used to drive the impeller 2 in bidirectional rotation.

[0044] like Figure 3 As shown, the impeller 2 includes a plurality of blades 21 distributed circumferentially and extending axially parallel, and a wheel carrier 22. The blades 21 are bent from the inner edge to the outer edge in a first direction, and the wheel carrier 22 includes a fixed disk b.

[0045] like Figure 1-4 As shown in Figures 7-8, the motor 3 includes a motor body 31 and an output shaft 32. The motor body 31 is fixed to the volute 1, and the output shaft 32 passes through the central hole r of the fixed disk b.

[0046] like Figure 5 As shown, the fastening plate 4 includes a base plate body 41 , an annular sleeve 42 and a gripping rotating plate 43 provided at the upper end of the annular sleeve 42 .

[0047] like Figure 1 、 7 As shown, the fastening disc 4 is sleeved on the output shaft 32, the output shaft 32 and the annular sleeve 42 are screwed together, and the chassis body 41 and the fixed disc b are fixed by fasteners.

[0048] like Figure 1 、 4 As shown in Figures 7 and 9, the end of the output shaft 32 is provided with a cut surface f. The locking plate 5 includes a limiting hole e that matches the contour of the end of the output shaft 32 and a plurality of locking holes c surrounding the limiting hole e. Fasteners pass through the locking holes c and the locking holes j on the end surface of the gripping rotating disk 43 to achieve securement.

[0049] The motor 3 drives the impeller 2 to rotate in a first direction which is the same as the bending direction of the blades 21 to realize the fume extraction function, and the motor 3 drives the impeller 2 to rotate in a second direction which is the same as the bending direction of the blades 21 to realize the self-cleaning function under the cleaning liquid spraying state.

[0050] By rotating the impeller 2 in a second direction that is the same as the bending direction of the blades 21 during cleaning, the oil stains can be thrown out more easily, thereby improving the self-cleaning ability.

[0051] Preferably, the speed at which the motor 3 drives the impeller 2 to rotate in the second direction, which is the same as the bending direction of the blades 21, is greater than the speed at which the motor 3 drives the impeller 2 to rotate in the first direction, which is the same as the bending direction of the blades 21. The self-cleaning ability is further improved by high-speed rotation.

[0052] Since the fastening disk 4 and the motor 3 are screwed together, the fastening disk 4 and the motor 3 are likely to generate reverse torque when the motor 3 rotates in the reverse direction, which is not good for the motor 3 and the impeller 2, and is prone to loosening due to reverse screwing. The setting of the locking plate 5 limits the reverse rotation of the two, thereby playing a role in preventing loosening.

[0053] Preferably, if Figure 1 、 4 As shown in Figures 6 and 9, the output shaft 32 includes an externally threaded section h and a smooth section k. The externally threaded section h has a cut surface f. The cut surface f restricts rotation between the locking plate 5 and the output shaft 32. The axial hole d of the annular sleeve 42 includes a straight hole section and an internally threaded section. The internally threaded section has a smaller diameter than the straight hole section.

[0054] Preferably, if Figure 1 、 5 As shown in FIG. 9 , the locking holes c are spaced apart arc-shaped elongated holes, with the stopper of the fastener positioned outside the arc-shaped elongated holes. The number of locking holes c is equal to or less than the number of locking holes j. This facilitates alignment of the locking plate 5 with the holes of the gripping rotary disk 43 during machining, improving the convenience of automated operation. Preferably, there are three arc-shaped elongated holes, with an arc angle ranging from 90-110°.

[0055] like Figure 4 、 6 As shown in FIG. 8 , the output shaft 32 is provided with a transverse positioning hole n, and the bottom of the fastening disk 4 is provided with a positioning channel m. The positioning shaft 6 passes through the transverse positioning hole n and is inserted into the positioning channel m of the fastening disk 4 to realize a limited connection.

[0056] like Figure 6 、 8As shown, the bottom of the fastening plate 4 is provided with a stepped protrusion 40. A positioning channel m is provided on the end surface of the stepped protrusion 40. The stepped protrusion 40 comprises a small cylindrical portion g on the outside and a large cylindrical portion y on the inside. The central hole r is a through hole corresponding to the outer diameter of the large cylindrical portion y. The stepped protrusion 40 passes through the central hole r. The fixing plate b is located at the small cylindrical portion g, and the large cylindrical portion y extends beyond the fixing plate b.

[0057] During installation, the output shaft 32 of the motor 3 passes through the central hole r of the fixed plate b of the wheel frame 22. The fastening plate 4 is fitted over the output shaft 32 and screwed onto the holding disc 43 of the fastening plate 4, threading the fastening plate 4 to the output shaft 32. A stepped protrusion 40 extends from the fixed plate b until the transverse positioning hole n aligns with the positioning channel m. The positioning shaft 6 extends through this portion to limit rotation. This restricts rotation between the fastening plate 4 and the output shaft 32 while also limiting the output length of the motor 3 output shaft 32, ensuring dimensional accuracy for subsequent assembly. Simultaneously or subsequently, the fastener is assembled to the holding disc 43 to prevent loosening and tighten.

[0058] The present invention has been described as a range fume blower with a self-cleaning function. Specific examples are used to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the present invention and its core concept. It should be noted that those skilled in the art may, without departing from the principles of the present invention, make various improvements and modifications to the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. The oil fume fan with self-cleaning function is characterized by: It includes a volute, an impeller, a motor, a fastening plate, a locking plate and a cleaning liquid spraying module; the cleaning liquid spraying module is arranged on one side of the volute and is used to spray the cleaning liquid to the impeller, and the motor is used to drive the impeller to rotate in both directions; The impeller includes a plurality of blades spaced circumferentially and extending axially parallel, and a wheel carrier, wherein the blades are bent from inner edges to outer edges in a first direction, and the wheel carrier includes a fixing plate; the motor includes a motor body and an output shaft, wherein the output shaft includes an external thread section and a smooth section, and the external thread section has a section; The fastening disc includes a chassis body, an annular sleeve, and a gripping rotating disc provided at the upper end of the annular sleeve; the axial hole of the annular sleeve includes a straight hole section and an internal thread section, the aperture of the internal thread section is smaller than that of the straight hole section, and the gripping rotating disc is provided with a locking hole; The motor body is fixed to the volute, the output shaft passes through the central hole of the fixed disk, the fastening disk is sleeved on the output shaft, the internal thread section is screwed with the external thread section, and the chassis body is fixed to the fixed disk; the locking plate includes a limiting hole matching the profile of the external thread section and a plurality of locking holes surrounding the limiting hole; the external thread section passing through the grip rotating disk passes through the limiting hole, and the fastener passes through the locking hole and the locking hole to achieve fixation; The motor drives the impeller to rotate in a first direction which is the same as the bending direction of the blades to realize the fume extraction function, and the motor drives the impeller to rotate in a second direction which is the same as the bending direction of the blades to realize the self-cleaning function in a cleaning liquid spraying state.

2. The oil fume blower with self-cleaning function according to claim 1, characterized in that; The locking holes are arc-shaped long holes spaced apart from each other, the limiting heads of the fasteners are clamped on the outsides of the arc-shaped long holes, and the number of the locking holes is less than or equal to the number of the locking holes.

3. The oil fume blower with self-cleaning function according to claim 2, characterized in that: The number of the arc-shaped long holes is 3, and the arc angle range is 90-110°.

4. The range hood fan with self-cleaning function according to claim 1, characterized in that: The output shaft of the output shaft is provided with a transverse positioning hole, the bottom of the fastening disk is provided with a positioning channel, the positioning shaft passes through the transverse positioning hole and is inserted into the positioning channel of the fastening disk to realize a limited connection.

5. The oil fume blower with self-cleaning function according to claim 4, characterized in that: A stepped protrusion is provided at the bottom of the fastening plate, and the positioning hole is provided on the end surface of the stepped protrusion.

6. The oil fume blower with self-cleaning function according to claim 5, characterized in that: The stepped protrusion includes a small cylindrical portion on the outside and a large cylindrical portion on the inside; the central hole is a through hole corresponding to the outer diameter of the large cylindrical portion; the stepped protrusion passes through the central hole, the fixed disk is located at the small cylindrical portion, and the large cylindrical portion extends out of the fixed disk.

7. The oil fume fan with self-cleaning function is characterized by: It includes a volute, an impeller, a motor, a fastening plate, a locking plate and a cleaning liquid spraying module; the cleaning liquid spraying module is arranged on one side of the volute and is used to spray the cleaning liquid to the impeller, and the motor is used to drive the impeller to rotate in both directions; The impeller includes a plurality of blades distributed circumferentially and extending axially in parallel, and a wheel frame, wherein the blades are bent from the inner edge to the outer edge in a first direction, and the wheel frame includes a fixed disk; the motor includes a motor body and an output shaft; The fastening plate includes a chassis body, an annular sleeve and a gripping rotating plate provided on the upper end of the annular sleeve; The motor body is fixed to the volute, the output shaft passes through the central hole of the fixed disk, the fastening disk is sleeved on the output shaft, the output shaft is screwed with the annular sleeve, and the chassis body is fixed to the fixed disk; the end of the output shaft is provided with a cut surface, the locking plate includes a limiting hole matching the contour of the end of the output shaft and a plurality of locking holes surrounding the limiting hole; the fastener passes through the locking hole and the locking hole on the end surface of the grip rotating disk to achieve fixation; The motor drives the impeller to rotate in a first direction which is the same as the bending direction of the blades to realize the fume extraction function, and the motor drives the impeller to rotate in a second direction which is the same as the bending direction of the blades to realize the self-cleaning function in a cleaning liquid spraying state.

8. The range hood fan with self-cleaning function according to claim 7, characterized in that: The output shaft includes an external thread section and a smooth section, and the external thread section has a cross-section; the shaft hole of the annular sleeve includes a straight hole section and an internal thread section, and the aperture of the internal thread section is smaller than that of the straight hole section; the output shaft of the output shaft is provided with a transverse positioning hole, and the bottom of the fastening plate is provided with a positioning channel, and the positioning shaft passes through the transverse positioning hole and is inserted into the positioning channel of the fastening plate to realize a limited connection.

9. The oil fume blower with self-cleaning function according to claim 7, characterized in that: The locking holes are arc-shaped long holes spaced apart from each other, the limiting heads of the fasteners are clamped on the outsides of the arc-shaped long holes, and the number of the locking holes is less than or equal to the number of the locking holes.

10. The oil fume blower with self-cleaning function according to claim 8, characterized in that: A stepped protrusion is provided at the bottom of the fastening disk; the stepped protrusion includes a small cylindrical portion on the outside and a large cylindrical portion on the inside; the central hole is a through hole corresponding to the outer diameter of the large cylindrical portion; the stepped protrusion passes through the central hole, the fixing disk is located at the small cylindrical portion, and the large cylindrical portion extends out of the fixing disk.

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