A range hood

Abstract

This invention relates to a range hood, which includes a housing and a centrifugal impeller installed in the housing. The range hood also includes a liquid storage device for storing cleaning fluid, a water pump, and a spray device. The housing has a mounting base that mates with the liquid storage device. The mounting base has a cleaning fluid channel communicating with the housing. The liquid storage device is configured to allow cleaning fluid to flow out into the cleaning fluid channel after being connected to the mounting base. The cleaning fluid channel, the water pump, and the spray device are sequentially connected. The spray device is located inside the housing and is configured to spray cleaning fluid toward the centrifugal impeller. This range hood can be used in applications requiring the extraction of cooking fumes.

Description

Technical Field

[0001] This invention belongs to the field of home appliance technology, specifically relating to a range hood. Background Technology

[0002] As an indispensable kitchen appliance in modern family life, range hoods are used to remove cooking fumes and exhaust them outdoors, thereby purifying the kitchen environment. The most widely used range hoods include top-draft range hoods, which allow fumes to directly enter the fan system during operation and are then exhausted into the common flue.

[0003] Because larger oil fumes tend to adhere to the fan blades and other parts of the fan system, long-term accumulation can cause the fan system to absorb a large amount of oil, which in turn greatly reduces the working effect of the range hood. It is necessary to clean the fan system to prevent it from affecting the performance of the range hood.

[0004] However, cleaning the fan system currently requires disassembling the range hood, and the grease adhering to the fan blades and other parts of the fan system is extremely difficult to remove. Manual cleaning is labor-intensive and can easily damage the fan blades. Therefore, existing range hoods have the problem of difficult-to-clean fan systems. Summary of the Invention

[0005] The purpose of this invention is to provide a range hood that facilitates the cleaning of the centrifugal impeller.

[0006] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0007] A range hood includes a housing and a centrifugal impeller installed in the housing. The range hood also includes a liquid storage device for storing cleaning liquid, a water pump, and a spray device. The housing is provided with a mounting base that cooperates with the liquid storage device. The mounting base has a cleaning liquid channel. The liquid storage device is configured to allow cleaning liquid to flow out into the cleaning liquid channel after being connected to the mounting base. The cleaning liquid channel, the water pump, and the spray device are connected in sequence. The spray device is located inside the housing and is configured to spray cleaning liquid toward the centrifugal impeller.

[0008] In some embodiments of the present invention, the housing includes a middle housing and a volute disposed within the middle housing, the centrifugal impeller is installed in the volute, the cleaning liquid channel is connected to the inlet of the water pump through a first connecting pipe, the outlet of the water pump and the inlet of the spray device are connected through a second connecting pipe, the spray device is located within the middle housing and the outlet of the spray device faces the blades of the centrifugal impeller.

[0009] In some embodiments of the present invention, the liquid storage device includes a liquid storage bottle and a water valve assembly. The water valve assembly is installed at the mouth of the liquid storage bottle, communicates with the liquid storage bottle, and is configured to prevent the cleaning liquid from flowing out when no external force is applied.

[0010] In some embodiments of the present invention, the liquid storage device further includes a bottle cap, which is detachably connected to the mouth of the liquid storage bottle and connected to the water valve assembly.

[0011] In some embodiments of the present invention, the water valve assembly includes a water valve seat, a valve body, and a water valve cover. The water valve seat is connected to the water valve cover, and the valve body is disposed between the water valve seat and the water valve cover. A first end of the valve body is connected to a first end of a spring, and a second end of the spring abuts against the water valve cover. The water valve seat has a water outlet extending from the bottle mouth. The valve body is configured to block the water outlet under the pressure of the spring. When the valve body is subjected to an external force, the spring is compressed, and the valve body releases the blockage of the water outlet.

[0012] With the valve body released from blocking the outlet, a channel is provided on the water valve cover, or between the water valve cover and the water valve seat, to connect the internal cavity of the storage bottle with the outlet of the water valve seat.

[0013] In some embodiments of the present invention, the mounting base is provided with a water valve baffle, which is used to extend into the water outlet to open the valve body so that the cleaning liquid can flow out.

[0014] In some embodiments of the present invention, the water valve seat is provided with an axially extending connecting body, the connecting body is provided with a snap-fit ​​hole, and the side wall of the water valve cover is provided with a snap-fit ​​protrusion that cooperates with the snap-fit ​​hole.

[0015] In some embodiments of the present invention, the liquid storage device further includes a vent pipe to ensure smooth water discharge during the water discharge process; the vent pipe is located inside the liquid storage bottle and connected to the water valve cover; the water valve cover has a first vent hole communicating with the vent pipe; the water valve seat has a second vent hole corresponding to the first vent hole; and the bottle cap has a third vent hole corresponding to the second vent hole.

[0016] In some embodiments of the present invention, the mounting base is disposed on the outside of the middle housing, and the water pump is disposed in the assembly position inside the back of the middle housing; an assembly hole is provided on the side wall of the middle housing, and the second connecting pipe passes through the assembly hole and extends into the middle housing to connect with the water inlet of the spray device.

[0017] In some embodiments of the present invention, the spraying device includes a nozzle with the spray nozzle facing the centrifugal impeller.

[0018] According to an embodiment of the present invention, a liquid storage device is used to store cleaning liquid, and a water pump is used to pump the cleaning liquid in the storage device to a spray device to spray it onto the centrifugal impeller. This embodiment integrates the mounting base of the cleaning liquid storage device, the water pump, and the spray device onto the range hood, allowing for continuous cleaning of the surface of the centrifugal impeller inside the range hood without the need for external tools. This avoids the long-term accumulation of grease on the centrifugal impeller surface, which can lead to reduced range hood efficiency and increased noise. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is a schematic diagram of the front of a range hood;

[0021] Figure 2 This is a schematic diagram of the back of a range hood;

[0022] Figure 3 This is a structural diagram of a range hood;

[0023] Figure 4 This is a side view of the range hood;

[0024] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0025] Figure 6 for Figure 4 Cross-sectional view along the BB direction;

[0026] Figure 7 for Figure 6 A magnified view of a section at point C;

[0027] Figure 8 This is a schematic diagram of the liquid storage device in a range hood;

[0028] Figure 9 for Figure 8 Exploded view of the liquid storage device shown.

[0029] The markings in the attached diagram are as follows:

[0030] 100. Range hood; 101. Main control module; 102. Motor drive module;

[0031] 10. Middle shell; 11. Mounting base; 111. Cleaning fluid channel; 112. Positioning rib; 113. Water valve baffle rib; 12. Wire sealing ring; 13. Water inlet sealing ring; 14. Water pump bracket; 15. First screw; 16. Second screw; 20. Volute; 30. Centrifugal impeller; 31. AC variable frequency motor; 40. Liquid storage device; 41. Liquid storage bottle; 42. Bottle cap; 43. Water valve seat; 431. Water outlet; 44. Valve body; 45. Spring; 46. Water valve cover; 47. Vent pipe; 48. First sealing ring; 49. Second sealing ring; 50. Water pump; 51. First connecting pipe; 52. Second connecting pipe; 60. Nozzle; 70. Noise reduction cover. Detailed Implementation

[0032] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0033] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof.

[0034] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0035] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0036] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention proposes a range hood 100, including a housing and a centrifugal impeller 30 installed in the housing. The range hood also includes a liquid storage device 40 for storing cleaning liquid, a water pump 50, and a spray device. The housing is provided with a mounting base 11 that cooperates with the liquid storage device 40. The mounting base 11 has a cleaning liquid channel 111. The liquid storage device 40 is configured to allow cleaning liquid to flow out to the cleaning liquid channel 111 after being connected to the mounting base 11. The cleaning liquid channel 111, the water pump 50, and the spray device are connected in sequence. The spray device is located inside the housing and is configured to spray cleaning liquid toward the centrifugal impeller 30.

[0037] According to an embodiment of the present invention, a liquid storage device is used to store cleaning liquid, and a water pump is used to pump the cleaning liquid in the storage device to a spraying device to spray onto the centrifugal impeller. This embodiment integrates the mounting base of the cleaning liquid storage device, the water pump, and the spraying device onto the range hood, allowing for continuous cleaning of the surface of the centrifugal impeller inside the range hood without the need for external tools. This avoids the long-term accumulation of grease on the centrifugal impeller surface, which can lead to reduced range hood efficiency and increased noise.

[0038] In some embodiments, the housing includes a middle housing 10 and a volute 20 disposed within the middle housing 10. A centrifugal impeller 30 is installed in the volute 20. A cleaning fluid channel is connected to the inlet of a water pump 50 via a first connecting pipe 51. The outlet of the water pump 50 and the inlet of a spray device are connected via a second connecting pipe 52. The spray device is located within the middle housing 10, and its outlet faces the blades of the centrifugal impeller 30. In this embodiment, the first connecting pipe 51 and the second connecting pipe 52 can be rubber tubes or silicone tubes.

[0039] In the range hood proposed in this embodiment, the water outlet of the spray device faces the blades of the centrifugal impeller. In this way, while the spray device sprays cleaning liquid onto the centrifugal impeller, the centrifugal impeller can rotate and drive the cleaning liquid to clean each of its blades. That is to say, the working process of the spray device and the centrifugal impeller are fully combined, which further improves the cleaning effect and better solves the problem of the existing range hood fan system being difficult to clean.

[0040] In some embodiments, the housing may further include a lower housing connected to the bottom of the middle housing and an upper housing connected to the top of the middle housing. The lower housing has a fume extraction port, and the cavity inside the lower housing communicates with the inlet of the volute inside the middle housing. The upper housing has a fume exhaust port, and the cavity inside the upper housing communicates with the outlet of the volute inside the middle housing.

[0041] like Figures 1 to 5 As shown, in the range hood 100 proposed in this embodiment, the liquid storage device 40 and the water pump 50 are both installed on the middle housing 10 of the body, for example, they can be installed on the side or the back. The spray device, which is connected to the water pump 50, is installed inside the middle housing 10, for example, it can be installed inside the volute 20, thereby spraying cleaning liquid onto the centrifugal impeller 30. Based on the above embodiment, as... Figure 5 As shown, the range hood 100 also includes a main control module 101, a motor drive module 102, and an AC variable frequency motor 31. The volute 20 is installed at the upper part of the flow cavity of the middle housing 10, and the centrifugal impeller 30 is installed inside the volute 20 and connected to the central shaft of the AC variable frequency motor 31. The AC variable frequency motor 31 is driven by the motor drive module 102, and its rotation speed is intelligently controlled by the main control module 101.

[0042] In some embodiments, the main control module 101 can also be connected to the control section of the water pump 50, and the main control module can control the opening and closing of the water pump. The time period for controlling the opening and closing of the water pump can be set in the main control module.

[0043] In some embodiments, the range hood of the present invention may further include a sensing module connected to the main control module, which sends a sensing signal to the main control module so that the main control module controls the water pump to turn on and off.

[0044] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the mounting base 11 for mates with the liquid storage device 40 is located on the outer side of the middle housing 10, such as... Figure 2 and Figure 3As shown, the water pump 50 is mounted inside the back of the middle housing 10. A water pump bracket 14 can be installed inside the back of the middle housing 10. The water pump bracket 14 is mounted on the middle housing 10 by multiple first screws 15. The number of first screws 15 can be four or more, and the first screws 15 can be φ12 self-tapping screws to ensure the stability of the water pump bracket 14. Understandably, the liquid storage device 40 is connected to the water pump 50. In this embodiment, the liquid storage device 40 and the water pump 50 are installed on the side and back respectively, which not only makes full use of the installation space of the middle housing 10 but also shortens the flow path of the cleaning liquid, facilitating pumping by the water pump 50 and spraying by the spraying device.

[0045] See also Figure 6 and Figure 7 The liquid storage device 40 is installed on the mounting base 11 and can communicate with the cleaning liquid channel 111 of the mounting base 11. Thus, in this embodiment, the two ends of the first connecting pipe 51 are respectively connected to the cleaning liquid channel 111 and the water pump 50, which facilitates assembly. In addition, a water inlet sealing ring 13 is provided at the connection between the mounting base 11 and the middle housing 10 to prevent the cleaning liquid from leaking from the mounting base 11 and its cleaning liquid channel 111.

[0046] Based on the above implementation methods, please continue to refer to Figure 2 The back of the middle housing 10 is provided with an assembly hole. The second connecting pipe passes through the assembly hole and extends into the middle housing to connect with the water inlet of the spray device. In one example, a sealing element (such as a sealing ring) 12 is provided in the assembly hole. The sealing element 12 has a through hole. The second connecting pipe 52 passes through the through hole and extends into the middle housing to connect with the water inlet of the spray device.

[0047] The seal 12 positions and fixes the second connecting pipe 52, improving its stability. In this embodiment, the second connecting pipe 52 extends into the middle housing through the assembly hole and communicates with the spraying device, eliminating the need for bypassing and further shortening the flow path of the cleaning liquid, thus facilitating pumping and spraying.

[0048] like Figure 3 and Figure 5 As shown, in some embodiments of the present invention, the range hood 100 further includes a noise reduction cover 70 mounted on the volute 20. The noise reduction cover 70 is mounted on the surface of the volute 20 by at least three second screws 16, which may also be φ12 self-tapping screws.

[0049] In this embodiment, the spray device includes a nozzle 60, the spray nozzle's nozzle facing the centrifugal impeller. The nozzle 60 can be mounted on a noise reduction cover 70, and the water inlet of the nozzle 60 is connected to the water outlet of the second connecting pipe. An atomizing mechanism can be installed inside the nozzle 60 to atomize the cleaning fluid.

[0050] Furthermore, in this embodiment, the nozzle 60 is configured as a curved nozzle, which facilitates the spraying of cleaning fluid into the centrifugal impeller 30. The atomization mechanism ensures that the cleaning fluid is sprayed more evenly and finely, thereby improving the cleaning effect. It should also be noted that when the spraying device is working, the user can control the start-up of the centrifugal impeller 30 and its rotation speed. Utilizing the centrifugal force generated by the rotation of the centrifugal impeller 30 within the volute 20, the cleaning fluid sprayed on the surface of the impeller blades can continuously flow and diffuse, further improving the cleaning effect on each impeller blade of the centrifugal impeller 30.

[0051] In this embodiment, the liquid storage device 40 is detachably connected to the mounting base 11. When the liquid storage device 40 is placed independently and is not subjected to external force, the cleaning liquid stored inside will not flow out. When connected to the mounting base 11, the liquid storage device 40 can be opened and the cleaning liquid can flow into the mounting base 11. After the water pump 50 starts pumping, the cleaning liquid can enter the spraying device through the cleaning liquid channel 111 of the mounting base 11, the first connecting pipe 51, the water pump 50, and the second connecting pipe 52.

[0052] Please see Figure 6 and Figure 7 and in conjunction with reference Figure 8 and Figure 9 In some embodiments of the present invention, the liquid storage device 40 includes a liquid storage bottle 41 and a water valve assembly. The water valve assembly is installed at the mouth of the liquid storage bottle 41 and is in communication with the liquid storage bottle 41. Under the condition that no external force is applied, the water valve assembly is used to prevent the cleaning liquid from flowing out.

[0053] Furthermore, in some embodiments of the present invention, the liquid storage device 40 further includes a bottle cap 42, which is detachably connected to the mouth of the liquid storage bottle 41 and connected to the water valve assembly. For example, the mouth of the bottle is provided with an external thread, and the inner side of the bottle cap 42 is provided with an internal thread that mates with the external thread. The water valve assembly can be snapped into the inner side of the bottle cap 42. Thus, the bottle cap 42 can be unscrewed from or installed on the liquid storage bottle 41 together with the water valve assembly, making it convenient for the user to add cleaning fluid and clean the liquid storage bottle 41 and the water valve assembly at any time.

[0054] Furthermore, such as Figure 8 and Figure 9As shown, in some embodiments of the present invention, the water valve assembly includes a water valve seat 43, a valve body 44, and a water valve cover 46. The water valve seat 43 and the water valve cover 46 are fastened and connected together. The water valve seat 43 communicates with the interior of the storage bottle 41 and has an outlet 431 extending from the bottle opening. The valve body 44 is disposed between the water valve seat 43 and the water valve cover 46. The first end of the valve body 44 is connected to the first end of a spring 45, and the second end of the spring 45 abuts against the water valve cover 46. The second end of the valve body 44 is pressed against the inlet end of the outlet 431 by the spring 45. In this embodiment, the spring 45 can apply a spring force to the valve body 44. Under the action of the spring force, the valve body 44 blocks the outlet 431 of the water valve seat 43 without other external forces, preventing the cleaning liquid from flowing out.

[0055] The water valve seat 43 is internally connected to the liquid storage bottle 41. Specifically, a channel connecting the internal cavity of the liquid storage bottle and the water outlet of the water valve seat may be provided on the water valve cover or between the water valve cover and the water valve seat.

[0056] Furthermore, such as Figure 9 As shown, the water valve assembly also includes a first sealing ring 48 and a second sealing ring 49, as described in the reference. Figure 8 The outlet 431 of the water valve seat 43 is cylindrical and extends from the through hole of the bottle cap 42 after assembly. The first sealing ring 48 is disposed between the outlet 431 and the inner wall of the through hole of the bottle cap 42, which not only provides positioning and locking for the connection between the water valve seat 43 and the bottle cap 42, but also prevents the cleaning fluid from leaking. The second sealing ring 49 is disposed between the water valve seat 43 and the water valve cap 46 to prevent the cleaning fluid from flowing out from the outside of both. The second sealing ring 49 has an opening that connects the internal cavity of the liquid storage bottle with the outlet of the water valve seat.

[0057] Based on the above implementation methods, such as Figure 7 As shown, in some embodiments of the present invention, a water valve baffle 113 is provided on the mounting base 11. The water valve baffle 113 extends into the water outlet and squeezes the valve body 44 to open the valve body 44 and allow the cleaning liquid to flow out.

[0058] The mounting base 11 may also be provided with a positioning rib 112, which may be a ring rib, to provide a limit for the liquid storage bottle 41 when it is installed on the mounting base 11. In this embodiment, the outlet 431 of the water valve seat 43 is inserted inside the positioning rib 112, and the first sealing ring 48 is located between the positioning rib 112 and the outlet 431 to prevent the cleaning liquid from flowing out from the gap. The water valve baffle rib 113 is provided inside the ring positioning rib 112. When the liquid storage device 40 is installed on the mounting base 11, the water valve baffle rib 113 can extend into the outlet 431 and squeeze the valve body 44, so that the spring 45 is compressed and the valve body 44 moves away from the outlet 431, thereby releasing the blockage and allowing the cleaning liquid to flow out from the outlet 431.

[0059] like Figure 9 As shown, in some embodiments of the present invention, the water valve seat is provided with an axially extending connecting body, the connecting body is provided with a snap-fit ​​hole, and the side wall of the water valve cover is provided with a snap-fit ​​protrusion that mates with the snap-fit ​​hole.

[0060] In some examples, the water valve seat 43 is provided with a plurality of axially extending connecting pieces, which are arranged around the end face of the water valve seat 43. The connecting pieces are used to connect with the water valve cover 46. Exemplarily, at least one connecting piece is provided with a snap-fit ​​hole in the radial direction. For example, two connecting pieces located on opposite sides are each provided with a snap-fit ​​hole. Correspondingly, the side wall of the water valve cover 46 is provided with a snap-fit ​​protrusion that mates with the snap-fit ​​hole. When the water valve cover 46 is fastened to the water valve seat 43, since the connecting piece can rotate slightly around its own end when under force, the protrusion on the side wall of the water valve cover 46 can be snapped into the snap-fit ​​hole, thereby connecting the water valve cover 46 and the water valve seat 43.

[0061] In some examples, the water valve cover 46 is a cover that is closed on the top and sides, and a spring is also provided between the snap-fit ​​hole and the snap-fit ​​protrusion.

[0062] When the spring 45 between the water valve seat 43 and the water valve cover 46 applies elastic force to the valve body 44, sealing the valve body 44 at the outlet 431 of the water valve seat 43, the spring between the snap-fit ​​hole and the snap-fit ​​protrusion also applies elastic force to the water valve cover 46, causing the bottom surface of the water valve cover 46 to abut against the upper surface of the water valve seat 43. This further seals the outlet 431, thus providing a double seal and more effectively preventing the cleaning fluid from flowing out.

[0063] When the water valve baffle 113 extends into the outlet 431 and squeezes the valve body 44, the spring 45 is compressed and the valve body 44 moves away from the outlet 431, releasing the blockage of the outlet 431. The spring 45 applies an upward elastic force to the water valve cover 46, compressing the spring between the snap hole and the snap protrusion. The bottom surface of the water valve cover 46 separates from the upper surface of the water valve seat 43. This forms a cleaning fluid outflow channel between the outlet 431 and the internal cavity of the storage bottle 41 between the outer wall of the water valve cover 46 and the inner wall of the water valve seat 43, as well as between the bottom surface of the water valve cover 46 and the upper surface of the water valve seat 43, allowing the cleaning fluid to flow out from the outlet 431.

[0064] Furthermore, in some embodiments of the present invention, such as Figure 8 and Figure 9As shown, the liquid storage device 40 also includes a vent pipe 47 to ensure smooth water discharge during the water discharge process; the vent pipe 47 is located inside the liquid storage bottle 41 and connected to the water valve cover 46, the water valve cover having a first vent hole communicating with the vent pipe; the water valve seat having a second vent hole corresponding to the first vent hole; when the bottle cap is connected to the bottle mouth of the liquid storage bottle, the bottle cap has a third vent hole corresponding to the second vent hole.

[0065] like Figure 9 As shown, in one example, the water valve cover 46 has a protruding connecting part, such as... Figure 8 As shown, the vent pipe 47 is installed on the connecting part and remains hollow. The connecting part has a first vent hole coaxially arranged with the vent pipe 47. A water-proof and breathable membrane can be installed at the first vent hole to ensure that the vent pipe 47 can communicate with the outside atmosphere.

[0066] When the liquid storage device 40 is installed on the mounting base 11, the top of the vent pipe 47 is higher than the liquid level in the liquid storage bottle 41. This ensures that air enters the liquid storage bottle 41 during the process of discharging the cleaning liquid, thereby preventing the water pump 50 from creating an internal vacuum that would cause the liquid storage bottle 41 to be sucked flat, thus ensuring that the liquid storage bottle 41 can discharge normally.

[0067] In this embodiment of the invention, only the top-exhaust range hood is used as an example for explanation. This embodiment of the invention is not limited to top-exhaust range hoods; it can also include other types of range hoods such as bottom-exhaust range hoods and island-style range hoods.

[0068] In summary, the range hood 100 proposed in this embodiment allows for easy cleaning of the internal storage device 40, which can be permanently installed in the mounting base 11. Users can replace and add cleaning fluid by disassembling the storage device 40. Upon receiving a cleaning command from the user, the main control module 101 instructs the water pump 50 to operate, drawing the cleaning fluid flowing from the storage device 40 into the mounting base 11. This fluid is then drawn into the water pump 50 through the first connecting pipe 51 via the cleaning fluid channel 111, and then sprayed out from the nozzle 60 through the second connecting pipe 52. Simultaneously, the cleaning fluid is continuously atomized by the atomizing structure and sprayed downwards onto the inside of the volute 20, adhering to the surface of the centrifugal impeller 30's blades. Furthermore, the cleaning fluid on the blade surface continues to diffuse and clean the blades under the action of centrifugal force. Therefore, the range hood 100 proposed in this embodiment is not only easy to clean but also provides excellent cleaning results, solving the problem of difficult-to-clean fan systems in existing range hoods.

[0069] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A range hood, comprising a housing and a centrifugal impeller installed in the housing, characterized in that, The range hood also includes a liquid storage device for storing cleaning liquid, a water pump, and a spray device. The housing is provided with a mounting base that cooperates with the liquid storage device. The mounting base has a cleaning liquid channel. The liquid storage device is configured to allow cleaning liquid to flow out to the cleaning liquid channel after being connected to the mounting base. The cleaning liquid channel, the water pump, and the spray device are connected in sequence. The spray device is located inside the housing and is configured to spray cleaning liquid toward the centrifugal impeller. The liquid storage device includes a liquid storage bottle, a water valve assembly, and a bottle cap. The water valve assembly is installed at the mouth of the liquid storage bottle and is connected to the liquid storage bottle. The water valve assembly is configured to prevent the cleaning liquid from flowing out when no external force is applied. The bottle cap is detachably connected to the mouth of the liquid storage bottle and is connected to the water valve assembly. The water valve assembly includes a water valve seat, a valve body, a water valve cover, a first sealing ring, and a second sealing ring. The water valve seat is connected to the water valve cover, and the valve body is disposed between the water valve seat and the water valve cover. A first end of the valve body is connected to a first end of a spring, and a second end of the spring abuts against the water valve cover. The water valve seat has an outlet extending from the bottle opening. The valve body is configured to block the outlet under the pressure of the spring. When the valve body is subjected to an external force, the spring is compressed, and the valve body releases the blockage of the outlet. In the state where the valve body releases the blockage of the outlet, a channel communicating between the internal cavity of the storage bottle and the outlet of the water valve seat is provided on the water valve cover, or between the water valve cover and the water valve seat. The first sealing ring is disposed between the outlet and the inner wall of the through hole of the bottle cover, and the second sealing ring is disposed between the water valve seat and the water valve cover. The liquid storage device also includes a vent pipe to ensure smooth water discharge during the water discharge process; the vent pipe is located inside the liquid storage bottle and connected to the water valve cover; the water valve cover has a first vent hole that communicates with the vent pipe. The water valve seat has a second vent hole corresponding to the first vent hole; The bottle cap has a third vent hole corresponding to the second vent hole.

2. The range hood according to claim 1, characterized in that, The housing includes a middle housing and a volute housing disposed within the middle housing. The centrifugal impeller is installed in the volute housing. The cleaning liquid channel is connected to the inlet of the water pump through a first connecting pipe. The outlet of the water pump and the inlet of the spray device are connected through a second connecting pipe. The spray device is located within the middle housing and the outlet of the spray device faces the blades of the centrifugal impeller.

3. The range hood according to claim 1, characterized in that, The mounting base is provided with a water valve baffle, which extends into the water outlet to open the valve body and allow the cleaning fluid to flow out.

4. The range hood according to claim 1, characterized in that, The water valve seat is provided with an axially extending connecting body, the connecting body is provided with a snap-fit ​​hole, and the side wall of the water valve cover is provided with a snap-fit ​​protrusion that mates with the snap-fit ​​hole.

5. The range hood according to claim 2, characterized in that, The mounting base is located on the outside of the middle housing, and the water pump is located at the internal assembly position on the back of the middle housing. An assembly hole is provided on the side wall of the middle shell, and the second connecting pipe passes through the assembly hole and extends into the middle shell to connect with the water inlet of the spray device.

6. The range hood according to claim 1, characterized in that, The spraying device includes a nozzle, the spray nozzle of which faces the centrifugal impeller.

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