Range hood with self-cleaning function

Abstract

The present invention relates to a range hood with a self-cleaning function, comprising a fan with a volute and an impeller and a cleaning component movably arranged at the air inlet of the fan, the cleaning component comprising a liquid spray pipe, a driving wheel, a driven wheel, a transmission belt and a nozzle. The liquid spray pipe of the present invention can swing back and forth within a certain range in front of the filter screen. Compared with the fixed liquid spray pipe, the present invention improves the spraying uniformity of the detergent, thereby improving the cleaning effect; at the same time, when the cleaning component is not in use, it can be rotated to one side of the air inlet of the fan, which will not block the air intake, thereby ensuring that the fan has a high oil fume suction air volume. Of course, since the cleaning component is hidden outside the flow range of oil fume, it also avoids the risk of the cleaning component being contaminated by oil fume for a long time and becoming unusable.

Description

Technical Field

[0001] The invention relates to a range hood with a self-cleaning function. Background Art

[0002] A range hood is a household appliance used to extract oil fumes generated by cooking on the stove. However, one of the biggest problems with most range hoods is that the volatilized oil fumes will condense inside the range hood, and the oil will mix with impurities such as dust and particles to form thick and difficult-to-clean oil scale inside the range hood. When the oil scale accumulates to a certain extent, a dense solidified layer will form inside the range hood, further increasing the difficulty of cleaning.

[0003] In the past, range hoods usually needed to be disassembled and cleaned. Some range hoods in the prior art already have a self-cleaning function. For example, Chinese patent "Random Hood" with authorization announcement number CN103732994B (application number: CN201280039582.3) and Chinese patent "Random Hood" with authorization announcement number CN101495814B (application number: CN200780027956.9) all disclose range hoods with a self-cleaning function. These range hoods are equipped with cleaning agent containers, pumps, spray ports and other components inside the device to spray cleaning agent on blades, flow channels, filters and other components, and remove residual liquid after cleaning. In the prior art, the cleaning structure of this type of structure is generally fixed in a specific position, and in order to allow the cleaning liquid to be sprayed into the impeller or the filter at the air inlet of the fan, it needs to be directly extended into the impeller or directly fixed on the front side of the filter. Although such a structure realizes the spraying of the detergent, the spraying range of the detergent is uneven, which can easily lead to the existence of cleaning dead corners; and, when the cleaning component is not needed, the oil smoke will also flow through the cleaning component, which not only affects the air volume of the fan, but also causes the cleaning component to be in contact with the oil smoke for a long time, so that the cleaning component itself adheres to a large amount of oil smoke, and even affects its use. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a range hood with a self-cleaning function, which improves the spraying uniformity of detergent and the cleaning effect by rotating a cleaning component in view of the current status of the prior art.

[0005] Another technical problem to be solved by the present invention is to provide a range hood with a self-cleaning function, which can hide the cleaning component outside the flow range of oil smoke when not cleaning, thereby increasing the fan air volume and protecting the cleaning component from contamination.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a range hood with a self-cleaning function, comprising a fan with a volute and an impeller, the impeller being rotatably arranged in the volute, the fan having an air inlet, the air inlet being provided with a filter screen, characterized in that: it also comprises a cleaning component movably arranged at the air inlet of the fan, the cleaning component comprising

[0007] A liquid spray pipe, wherein the first end of the liquid spray pipe is rotatably disposed at the edge of the fan air inlet, the other end of the liquid spray pipe is a rotating free end and can be rotated to the middle of the fan air inlet, the liquid spray pipe is hollow inside to form a liquid collecting chamber, the liquid spray pipe is provided with a liquid inlet connected to the liquid collecting chamber, and the liquid spray pipe is provided with at least two liquid outlet holes arranged at intervals on one side close to the filter screen;

[0008] A driving wheel rotatably disposed on the first end of the liquid spraying pipe;

[0009] A driven wheel rotatably disposed on the second end of the liquid spraying pipe;

[0010] A transmission belt rotatably connected to the driving wheel and the driven wheel; and

[0011] The nozzle is arranged on the transmission belt and moves synchronously with the transmission belt. The nozzle has a liquid inlet hole connected with the liquid collecting chamber of the liquid spraying pipe and a nozzle arranged toward the filter screen.

[0012] In the above scheme, the first end of the liquid spraying pipe is bent to one side to form a first connecting arm, the second end of the liquid spraying pipe is bent to one side to form a second connecting arm arranged parallel to the first connecting arm, the driving wheel is rotatably mounted on the first connecting arm, and the driven wheel is rotatably mounted on the second connecting arm. Such a structure is adopted to make the driving wheel and the driven wheel located in the same plane, so that the transmission belt can drive the nozzle to reciprocate stably.

[0013] Preferably, a driving member for driving the liquid spray pipe and the driving wheel to rotate is provided on the outer side of the volute and arranged near the air inlet. A transmission assembly is connected between the driving member, the liquid spray pipe and the driving wheel, which can make the liquid spray pipe and the driving wheel rotate simultaneously and generate relative rotation. Only when the driving wheel can rotate relative to the liquid spray pipe can the reciprocating movement of the nozzle be realized to eliminate the cleaning dead angle.

[0014] Further preferably, the transmission assembly includes a first gear, a second gear and a connecting rod, the first gear is connected to the output end of the driving member, the second gear is meshed with the first gear for transmission, the second gear is sleeved on the first connecting arm of the liquid spraying pipe and can drive the first connecting arm to rotate synchronously, the first end of the connecting rod is connected to the side wall of the second gear and arranged close to the edge of the second gear, and the second end of the connecting rod is connected to the side wall of the driving wheel and the connection is arranged close to the edge of the driving wheel. With the above structure, the driving member is preferably a motor, and when the motor rotates forward and reversely, the second gear can be driven by the first gear to rotate accordingly, and the liquid spraying pipe can rotate synchronously with the second gear, so that it can swing within a certain range of the fan inlet. At the same time, since the driving wheel is connected to the second gear through the connecting rod, such a connection method causes relative rotation between the driving wheel and the second gear due to the difference in linear speed, so that when the liquid spraying pipe swings, the transmission belt drives the nozzle to move back and forth along the axial direction of the liquid spraying pipe, and the dirt on the filter screen is removed at a subtle point, avoiding cleaning dead corners and improving the cleaning effect.

[0015] To facilitate installation, the end of the first connecting arm of the spray pipe forms the liquid inlet, and a support tube capable of supporting the rotation of the first connecting arm is provided on the outer wall of the volute. The support tube is hollow inside and connected to the liquid inlet of the spray pipe, and the support tube is connected to the washing liquid supply structure.

[0016] Preferably, the length of the liquid spray pipe is greater than the radius of the filter screen but less than the diameter of the filter screen. The length of the liquid spray pipe is greater than the radius of the filter screen to ensure that the entire filter screen is cleaned during the rotation of the fan, and the length of the liquid spray pipe is less than the diameter of the filter screen to maintain the liquid outlet pressure as much as possible, reduce the pressure loss of the washing liquid before spraying, and improve the cleaning effect.

[0017] In each of the above schemes, the cleaning component also includes a liquid storage tank, a liquid guide tube and a water pump. The liquid storage tank is arranged on the outside of the volute and is used to store detergent. The first end of the liquid guide tube is connected to the liquid storage tank, and the second end of the liquid guide tube is connected to the liquid inlet of the liquid spray pipe. The water pump is used to provide power for the liquid transportation in the liquid guide tube.

[0018] Preferably, the cleaning assembly further comprises a heating device, which is arranged at the periphery of the liquid conduit and can heat the liquid in the liquid conduit. In winter, the cleaning effect of the detergent on grease is poor, and heating can improve the cleaning effect.

[0019] Preferably, the liquid outlet holes are arranged in groups and spaced apart along the axial direction of the liquid spray pipe, and each group of liquid outlet holes includes two relatively separated liquid outlet holes arranged at an angle of 10 to 30 degrees to the air inlet of the fan. This structure expands the liquid outlet range, further avoids the occurrence of cleaning dead corners, and improves the cleaning effect.

[0020] Compared with the prior art, the advantages of the present invention are: the spray pipe of the present invention can swing back and forth within a certain range on the front side of the filter. Compared with the fixed spray pipe, the present invention improves the spraying uniformity of the detergent, thereby improving the cleaning effect; at the same time, when the cleaning component is not in use, it can be rotated to one side of the fan air inlet without blocking the air intake, thereby ensuring that the fan has a high oil fume absorption air volume. Of course, since the cleaning component is hidden outside the flow range of the oil fume, the risk of the cleaning component being contaminated by oil fume for a long time and becoming unusable is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the hidden shell;

[0023] Figure 3 is a cross-sectional view of a liquid spray pipe in an embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the assembly relationship between the cleaning component and the transmission component in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the cleaning component in the embodiment of the present invention when it is in use;

[0026] Figure 6 This is a schematic diagram of the structure of the cleaning component in an embodiment of the present invention when not in use. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 6 As shown, the range hood with self-cleaning function of this embodiment includes a housing 3, a fan 1 and a cleaning assembly 2. The fan 1 is arranged in the housing 3. The fan 1 has a volute 11 and an impeller 12. The impeller 12 is rotatably arranged in the volute 11. The fan 1 has an air inlet 10, and a filter 13 that can rotate with the impeller 12 is arranged on the air inlet 10.

[0029] The cleaning assembly 2 of this embodiment can be movably arranged at the air inlet 10 of the fan 1. Specifically, the cleaning assembly 2 includes a liquid spray pipe 21, a driving wheel 22, a driven wheel 23, a transmission belt 24, a nozzle 25, a liquid storage tank 26, a liquid guide pipe 27, a water pump and a heating device 28. The first end of the liquid spray pipe 21 can be rotatably arranged at the edge of the air inlet 10 of the fan 1, and the other end of the liquid spray pipe 21 is a rotating free end and can be rotated to the middle of the air inlet 10 of the fan 1. The length of the liquid spray pipe 21 is greater than the radius of the filter 13 but less than the diameter of the filter 13. The length of the liquid spray pipe 21 is greater than the radius of the filter 13 to ensure that the entire filter 13 is cleaned during the rotation of the fan 1. The length of the liquid spray pipe 21 is less than the diameter of the filter 13 in order to maintain the liquid outlet pressure as much as possible, reduce the pressure loss of the washing liquid before spraying, and improve the cleaning effect. The liquid spray pipe 21 is hollow inside to form a liquid collecting chamber 210. The liquid spray pipe 21 is provided with a liquid inlet 211 connected to the liquid collecting chamber 210. The liquid spray pipe 21 is provided with a plurality of liquid outlet holes 212 arranged at intervals on one side close to the filter screen 13. The liquid outlet holes 212 are arranged in groups and spaced apart along the axial direction of the liquid spray pipe 21. Each group of liquid outlet holes 212 includes two liquid outlet holes 212 that are relatively separated and arranged at an angle a of 10 to 30 degrees to the air inlet 10 of the fan 1. This structure expands the liquid outlet range and further avoids the occurrence of cleaning dead corners to improve the cleaning effect. The driving wheel 22 is rotatably disposed on the first end of the liquid spray pipe 21, the driven wheel 23 is rotatably disposed on the second end of the liquid spray pipe 21, and the transmission belt 24 is rotatably connected to the driving wheel 22 and the driven wheel 23. The nozzle 25 is arranged on the transmission belt 24 and moves synchronously with the transmission belt 24. The nozzle 25 has a liquid inlet hole 251 connected to the liquid collecting chamber of the liquid spraying pipe 21 and a nozzle 252 arranged toward the filter screen 13. The liquid inlet hole 251 is connected to the liquid collecting chamber of the liquid spraying pipe 21 through a plastic hose.

[0030] Specifically, the first end of the liquid spraying pipe 21 is bent to one side to form a first connecting arm 213, and the second end of the liquid spraying pipe 21 is bent to one side to form a second connecting arm 214 arranged parallel to the first connecting arm 213. The driving wheel 22 is rotatably mounted on the first connecting arm 213, and the driven wheel 23 is rotatably mounted on the second connecting arm 214. With such a structure, the driving wheel 22 and the driven wheel 23 can be located in the same plane, so that the transmission belt 24 can drive the nozzle 25 to reciprocate stably.

[0031] A driving member 29 for driving the liquid spray pipe 21 and the driving wheel 22 to rotate is arranged near the air inlet 10 on the outside of the volute 11. The driving member 29 is a motor whose motor shaft can rotate forward and reverse. A transmission assembly 20 is connected between the driving member 29, the liquid spray pipe 21, and the driving wheel 22, which can make the liquid spray pipe 21 and the driving wheel 22 rotate simultaneously and generate relative rotation. Only when the driving wheel 22 can rotate relative to the liquid spray pipe 21 can the reciprocating movement of the nozzle 25 be realized to eliminate the cleaning dead angle. The transmission assembly 20 includes a first gear 201, a second gear 202 and a connecting rod 203. The first gear 201 is connected to the output shaft of the driving member 29 and rotates synchronously with the output shaft. The second gear 202 is meshed with the first gear 201 for transmission. The second gear 202 is sleeved on the first connecting arm 213 of the spray pipe 21 and can drive the first connecting arm 213 to rotate synchronously. The first end of the connecting rod 203 is connected to the side wall of the second gear 202 and is arranged close to the edge of the second gear 202. The second end of the connecting rod 203 is connected to the side wall of the driving wheel 22 and the connection is arranged close to the edge of the driving wheel 22. With the above structure, when the motor rotates forward and reverse, the first gear 201 can drive the second gear 202 to rotate accordingly, and the spray pipe 21 can rotate synchronously with the second gear 202, so that it can swing within a certain range of the air inlet 10 of the fan 1. At the same time, since the driving wheel 22 is connected to the second gear 202 through the connecting rod 203, this connection method causes relative rotation between the driving wheel 22 and the second gear 202 due to the difference in linear speed, so that when the spray pipe 21 swings, the transmission belt 24 drives the nozzle 25 to reciprocate along the axial direction of the spray pipe 21, so as to remove the dirt on the filter 13 in the fine details, avoid cleaning dead corners, and improve the cleaning effect.

[0032] For ease of installation, the end of the first connecting arm 213 of the liquid spraying pipe 21 forms a liquid inlet 211, and a support pipe 111 capable of supporting the rotation of the first connecting arm 213 is provided on the outer wall of the volute 11. The support pipe 111 is hollow inside and connected to the liquid inlet 211 of the liquid spraying pipe 21. The liquid storage tank 26 is provided outside the volute 11 and is used to store detergent. The first end of the liquid guide pipe 27 is connected to the liquid storage tank 26, and the second end of the liquid guide pipe 27 is connected to the input end of the support pipe 111. The water pump is used to provide power for the liquid transportation in the liquid guide pipe 27. The heating device 28 is provided on the periphery of the liquid guide pipe 27 and can heat the liquid in the liquid guide pipe 27. At the temperature angle in winter, the cleaning effect of the detergent on the oil stain is poor, and the cleaning effect can be improved after heating.

[0033] The liquid spray pipe 21 of the present embodiment can swing back and forth within a certain range in front of the filter 13. Compared with the fixed liquid spray pipe, the present embodiment improves the uniformity of detergent spraying, thereby improving the cleaning effect. At the same time, when the cleaning component 2 is not in use, it can be rotated to one side of the air inlet 10 of the fan 1 without blocking the air intake, thereby ensuring that the fan 1 has a high oil fume absorption air volume. Of course, since the cleaning component 2 is hidden outside the flow range of the oil fume, the risk of the cleaning component 2 being unusable due to long-term pollution by oil fume is also avoided.

Claims

1. A range hood with a self-cleaning function, comprising a fan (1) having a volute (11) and an impeller (12), wherein the impeller (12) is rotatably disposed in the volute (11), the fan (1) having an air inlet (10), and a filter (13) disposed on the air inlet (10), characterized in that: It also includes a cleaning assembly (2) movably arranged at the air inlet (10) of the fan (1), the cleaning assembly (2) including A liquid spray pipe (21), wherein a first end of the liquid spray pipe (21) is rotatably arranged at the edge of the air inlet (10) of the fan (1), the other end of the liquid spray pipe (21) is a rotatable free end and can be rotated to the middle of the air inlet (10) of the fan (1), the interior of the liquid spray pipe (21) is hollow to form a liquid collecting chamber, the liquid spray pipe (21) is provided with a liquid inlet (211) connected to the liquid collecting chamber, and the liquid spray pipe (21) is provided with at least two liquid outlet holes (212) arranged at intervals on one side close to the filter screen (13); A driving wheel (22) rotatably disposed on the first end of the liquid spraying pipe (21); A driven wheel (23) rotatably disposed on the second end of the liquid spraying pipe (21); A transmission belt (24) rotatably connected to the driving wheel (22) and the driven wheel (23); and a nozzle (25) disposed on the transmission belt (24) and moving synchronously with the transmission belt (24), the nozzle (25) comprising a liquid inlet hole (251) connected to the liquid collecting chamber of the liquid spraying pipe (21) and a nozzle (252) arranged toward the filter screen (13); The outer side of the volute (11) is provided with a driving member (29) arranged near the air inlet (10) and used for driving the liquid spray pipe (21) and the driving wheel (22) to rotate; a transmission assembly (20) is connected between the driving member (29), the liquid spray pipe (21) and the driving wheel (22) and can make the liquid spray pipe (21) and the driving wheel (22) rotate simultaneously and generate relative rotation; the transmission assembly (20) comprises a first gear (201), a second gear (202) and a connecting rod (203); the first gear (201) is connected to the driving member (201) and the second gear (202) is connected to the driving member (203); 29), the second gear (202) is meshed with the first gear (201) for transmission, the second gear (202) is sleeved on the first connecting arm (213) of the liquid spraying pipe (21) and can drive the first connecting arm (213) to rotate synchronously, the first end of the connecting rod (203) is connected to the side wall of the second gear (202) and is arranged close to the edge of the second gear (202), and the second end of the connecting rod (203) is connected to the side wall of the driving wheel (22) and the connection is arranged close to the edge of the driving wheel (22); The cleaning assembly (2) further comprises a liquid storage tank (26), a liquid guide tube (27) and a water pump; the liquid storage tank (26) is arranged outside the volute (11) and is used to store detergent; a first end of the liquid guide tube (27) is connected to the liquid storage tank (26); a second end of the liquid guide tube (27) is connected to a liquid inlet (211) of a liquid spraying tube (21); and the water pump is used to provide power for liquid transportation in the liquid guide tube (27).

2. The range hood with self-cleaning function according to claim 1, characterized in that: The first end of the liquid spraying pipe (21) is bent toward one side to form a first connecting arm (213), and the second end of the liquid spraying pipe (21) is bent toward one side to form a second connecting arm (214) arranged parallel to the first connecting arm (213). The driving wheel (22) is rotatably mounted on the first connecting arm (213), and the driven wheel (23) is rotatably mounted on the second connecting arm (214).

3. The range hood with self-cleaning function according to claim 2, characterized in that: The first connecting arm (213) of the liquid spraying pipe (21) forms the liquid inlet (211); a supporting pipe (111) capable of supporting the first connecting arm (213) to rotate is arranged on the outer wall of the volute (11); the supporting pipe (111) is hollow inside and connected to the liquid inlet (211) of the liquid spraying pipe (21); and the supporting pipe (111) is connected to a washing liquid supply structure.

4. The range hood with self-cleaning function according to any one of claims 1 to 3, characterized in that: The length of the liquid spray pipe (21) is greater than the radius of the filter screen (13) but smaller than the diameter of the filter screen (13).

5. The range hood with self-cleaning function according to any one of claims 1 to 3, characterized in that: The cleaning component (2) further comprises a heating device (28), which is arranged at the periphery of the liquid guiding tube (27) and is capable of heating the liquid in the liquid guiding tube (27).

6. The range hood with self-cleaning function according to any one of claims 1 to 3, characterized in that: The liquid outlet holes (212) are arranged in a plurality of groups at intervals along the axial direction of the liquid spray pipe (21), and each group of liquid outlet holes (212) comprises two liquid outlet holes (212) which are relatively separated and arranged at an angle (a) of 10 to 30 degrees with the air inlet (10) of the fan (1).

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