Range hood capable of automatically storing water and control method thereof

Abstract

The present invention provides a range hood capable of automatically storing water and a control method thereof, belonging to the technical field of kitchen appliances. The range hood comprises a wind cabinet assembly, a cleaning assembly, and a control component. The wind cabinet assembly comprises a volute and an impeller located within the volute. The cleaning assembly comprises a nozzle for cleaning the impeller and a water pump. The control component comprises a housing and a control component located within the housing. The volute is provided with an oil drain hole, the housing is provided with an oil drain passage and a water inlet hole, the water outlet of the water pump is connected to the inlet of the nozzle, and the water inlet hole is connected to the water outlet of the water pump. The control component is elastically connected to a side of the housing near the water inlet hole, and the oil drain passage is connected to the oil drain hole. The control component can close or open the oil drain passage in response to the water outlet pressure of the water pump to store or drain water from the volute. The present invention innovatively employs a water storage solution without a drive motor, achieving oil-water separation and improving cleaning performance.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a range hood capable of automatically storing water and a control method thereof. Background Art

[0002] Chinese cooking often involves stir-frying over high heat and steaming and stewing. This process generates large amounts of oil smoke and water vapor, which accumulate on the volute and impeller inside the range hood's air duct. This increases the weight of the impeller, increasing rotational resistance, causing rotational imbalance and noise, and weakening the ability to extract and exhaust oil smoke. Furthermore, the internal oil creates an unpleasant odor, impacting the user experience and reliability of the product. Therefore, range hoods must not only have a higher air volume and greater oil smoke extraction capacity, but also a self-cleaning function to clean the volute and impeller inside the air duct, ensuring a high degree of cleanliness, smooth operation of the volute and impeller, and extending product lifespan and user experience.

[0003] Currently, most range hoods with automatic cleaning functions on the market use high-temperature steam or cold water cleaning solutions. Water is heated by a water pump and heater, and then passes through a nozzle connected to the water pump. As the impeller rotates, the steam or water sprayed from the nozzle flushes the impeller blades, thereby achieving the desired cleaning effect. However, due to factors such as short automatic cleaning time, small water cup capacity, low water pump pressure, and low heater power, the impeller and volute inside the air duct are not fully cleaned, resulting in a low cleaning efficiency and unsatisfactory cleaning effect. Summary of the Invention

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] According to a first aspect of the present invention, a range hood capable of automatically storing water is provided. The range hood capable of automatically storing water comprises:

[0006] The wind cabinet assembly includes a volute and an impeller located in the volute, wherein the volute is provided with an oil drain hole;

[0007] A cleaning assembly, comprising a nozzle and a water pump for cleaning the impeller, wherein the water outlet of the water pump is connected to the inlet of the nozzle;

[0008] The regulating component includes a housing and a regulating assembly located inside the housing, the housing being provided with an oil discharge passage and a water inlet, the water inlet being connected to the water outlet end of the water inlet, the regulating assembly being elastically connected to a side of the housing near the water pump, and the oil discharge passage being connected to the oil discharge hole;

[0009] Wherein, the regulating component can close or open the oil discharge channel under the action of the water outlet pressure of the water pump to achieve water storage or drainage of the volute.

[0010] According to one embodiment of the present invention, the control component includes:

[0011] an elastic member, fixedly connected to an end of the housing away from the water inlet;

[0012] The telescopic member includes a first end and a second end that are oppositely disposed, wherein the first end is connected to a side of the elastic member close to the water inlet hole, and the second end extends in a direction away from the water inlet hole;

[0013] A blocking member, one end of which is connected to the other end of the telescopic member, and the other end of which can be inserted into the oil drainage channel; wherein the telescopic member and the blocking member are respectively interference fit with the shell, and the telescopic member can drive the blocking member to reciprocate under the joint action of water and the elastic member.

[0014] According to one embodiment of the present invention, the housing is provided with an annular plate for mounting the elastic member, and the telescopic member comprises:

[0015] A telescopic rod can be inserted into and out of the annular plate, and one end of the telescopic rod away from the water inlet is connected to the blocking member; the elastic member is sleeved on the outer periphery of the telescopic rod, and the elastic member is located between the annular plate and the end of the telescopic rod close to the water inlet;

[0016] A first sealing ring is connected to a side of the telescopic rod close to the water inlet;

[0017] The telescopic rod is interference-fitted with the interior of the housing through the first sealing ring, and the telescopic rod drives the elastic member to perform telescopic movement under the action of water.

[0018] According to one embodiment of the present invention, the annular plate is provided with a limiting cylinder for guiding the telescopic rod, and the telescopic rod passes through the limiting cylinder and the annular plate and is connected to the blocking member;

[0019] A first rib is provided at one end of the telescopic rod close to the water inlet hole, and the first sealing ring is sleeved on the outer periphery of the first rib.

[0020] According to one embodiment of the present invention, the blocking member includes:

[0021] a plug, one end of which is connected to the telescopic rod;

[0022] The second sealing ring is sleeved on the other end of the plug, and the plug is interference-fitted with the interior of the shell through the second sealing ring to ensure separation of water and oil.

[0023] According to one embodiment of the present invention, the housing is provided with a first through hole corresponding to the oil drain hole and a second through hole for draining oil, the first through hole is connected to an oil receiving pipe, the second through hole is connected to an oil drain pipe, the oil receiving pipe is connected to the oil drain pipe through the housing to form the oil drain channel;

[0024] Wherein, the first through hole is located at an end of the shell away from the water inlet hole, and the second through hole is located at an end of the shell close to the water inlet hole.

[0025] According to one embodiment of the present invention, an opening is provided on a side of the shell away from the water inlet hole, and a sealing block is connected to the opening. The sealing block is inserted into the interior of the shell through the opening and extends to a position between the first through hole and the second through hole. The sealing block is provided with an oil hole connecting the first through hole and the second through hole, and the sealing member can abut against a side of the sealing block close to the second through hole to close the oil drainage channel.

[0026] According to one embodiment of the present invention, the range hood capable of automatically storing water further comprises:

[0027] a pressure sensor, connected to the water pump and the water inlet, for determining the pressure inside the housing;

[0028] a liquid level sensor connected to the volute and used to detect the liquid level at the bottom of the volute;

[0029] a control system connected to the liquid level sensor, the pressure sensor and the water pump;

[0030] The control system determines the water pressure of the housing or the sealing performance of the oil drain passage according to the signals of the liquid level sensor and the pressure sensor.

[0031] According to one embodiment of the present invention, the range hood capable of automatically storing water further comprises:

[0032] An adapter, one end of which is detachably connected to a side of the housing near the water inlet;

[0033] a connecting pipe, one end of which is connected to the other end of the adapter;

[0034] A tee pipe connected between the connecting pipe, the water pump and the nozzle;

[0035] A fixing frame has one end fixed to the shell and the other end detachably connected to the volute.

[0036] According to a second aspect of the present invention, a control method for a range hood is provided. The control method is applied to the range hood capable of automatically storing water according to any one of the first aspects of the present invention. The control method comprises:

[0037] Start the range hood cleaning program;

[0038] The water pump starts working and delivers the cleaning liquid to the nozzle and the housing, wherein the cleaning liquid entering the housing drives the regulating component to move and close the oil drain channel under the action of water pressure;

[0039] The liquid level sensor detects the liquid level in the volute in real time, and the pressure sensor detects the water pressure inside the shell in real time;

[0040] determining whether the oil drain channel is leaking oil based on the liquid level and pressure information;

[0041] If there is oil leakage, the cleaning process will be stopped and a fault reminder will be issued; if there is no oil leakage, the cleaning process will continue;

[0042] When the cleaning is finished, the water pump stops working;

[0043] The regulating component opens the oil drain passage and the oil drain hole.

[0044] According to one embodiment of the present invention, the control method includes:

[0045] Obtaining a first liquid level change value and a first liquid level setting value within a set time;

[0046] Obtaining a pressure measurement value and a pressure setting value of the water inlet;

[0047] When the first liquid level change value is less than or equal to the first liquid level setting value and the pressure measurement value is greater than or equal to the first pressure setting value, the sealing performance of the oil discharge channel is good;

[0048] When the first liquid level change value is greater than the first liquid level setting value, a fault reminder is issued.

[0049] According to one embodiment of the present invention, when the first liquid level change value is greater than the first liquid level setting value and the pressure measurement value is less than the pressure setting value, the water outlet pressure of the water pump is increased to a maximum value, while continuing to compare the relationship between the first liquid level change value and the first liquid level setting value;

[0050] If the first liquid level change value is less than or equal to the first liquid level setting value, it indicates that the sealing performance of the oil discharge channel is good; if the first liquid level change value is greater than the first liquid level setting value, it indicates that there is oil leakage in the oil discharge channel.

[0051] According to an embodiment of the present invention, after the oil drain hole, whether the oil drain passage is draining smoothly is determined based on the liquid level and pressure change information in the volute;

[0052] Obtain a second liquid level difference measurement value and a second liquid level difference setting value within a set time;

[0053] Obtaining a pressure measurement value and a pressure setting value of the water inlet;

[0054] If the liquid level difference measurement value is less than or equal to the liquid level difference setting value and the pressure measurement value is less than the pressure difference setting value, the oil discharge channel discharges oil smoothly;

[0055] If the liquid level difference measurement value is less than the liquid level difference set value and the pressure difference measurement value is greater than the pressure difference set value, the oil discharge passage is not draining oil smoothly and the system prompts a fault.

[0056] An embodiment of the present invention has the following advantages or beneficial effects:

[0057] The present invention increases the contact area and contact time between the volute, the impeller and the cleaning liquid by storing water at the bottom of the volute. Under the traction of the high-speed rotating airflow of the impeller and its own gravity, the water at the bottom of the volute will form a tidal surfing effect, flushing the impeller and the inner wall of the bottom of the volute, thereby improving the cleaning effect.

[0058] An innovative water storage solution without a drive motor is adopted, and the water path on the right side of the shell and the oil path on the left side are separated to achieve oil-water separation. It can also ensure that the friction resistance remains constant when the telescopic rod slides left and right. The solution is simple and reliable.

[0059] The control method described in the present invention can not only realize the water storage function of the volute and improve the cleaning effect, but also use the pressure sensor and the liquid level sensor to monitor and adjust the water pressure and liquid level to the set value in real time to ensure successful water storage; it can also determine whether the oil discharge channel is sealed or open according to the pressure and liquid level conditions, effectively improving the cleaning effect of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0061] Figure 1 is a schematic diagram of a range hood capable of automatically storing water according to an exemplary embodiment.

[0062] Figure 2 FIG. 1 is a second schematic diagram illustrating a regulating assembly and a pressure sensor according to an exemplary embodiment.

[0063] Figure 3is a schematic diagram showing a first state of a control component according to an exemplary embodiment.

[0064] Figure 4 is a schematic diagram showing a first state of a control component according to an exemplary embodiment.

[0065] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0066] Figure 6 is a schematic diagram showing a method for controlling a range hood according to an exemplary embodiment.

[0067] Figure 7 FIG. 1 is a control flow chart of a range hood cleaning phase according to an exemplary embodiment.

[0068] Figure 8 FIG. 1 is a control flow chart after the range hood cleaning is completed according to an exemplary embodiment.

[0069] The description of the accompanying drawings is as follows:

[0070] 1. Wind cabinet assembly; 11. Volute; 111. Oil drain hole; 12. Impeller;

[0071] 2. Cleaning assembly; 21. Nozzle; 22. Water pump; 23. Drain pipe; 24. Water inlet pipe;

[0072] 3. Control component; 31. Housing; 310. Oil drain channel; 311. Water inlet; 312. Annular plate; 3121. Limiting cylinder; 313. First through hole; 314. Second through hole; 315. Oil connecting pipe; 316. Oil drain pipe; 317. Sealing block; 3171. Oil hole;

[0073] 32. Control assembly; 321. Elastic member; 322. Telescopic member; 3221. Telescopic rod; 3222. First rib; 3223. First sealing ring; 3224. Third sealing ring; 323. Blocking member; 3231. Plug; 3232. Second sealing ring;

[0074] 33. Adapter; 331. Boss; 34. Connecting pipe; 35. Tee; 36. Fixing bracket;

[0075] 4. Pressure sensor; 5. Range hood. DETAILED DESCRIPTION

[0076] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as 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 concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0077] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0078] A range hood capable of automatically storing water according to an embodiment of the present invention, such as Figure 1-4 As shown, the range hood that can automatically store water includes a wind cabinet component 1, a cleaning component 2 and a regulating component 3. The wind cabinet component 1 includes a volute 11 and an impeller 12 located in the volute 11. The cleaning component 2 includes a nozzle 21 and a water pump 22 for cleaning the impeller 12. The regulating component 3 includes a shell 31 and a regulating component 32 located inside the shell 31. The regulating component 32 is elastically connected to one side of the shell 31 near the water inlet 311. The volute 11 is provided with an oil discharge hole 111. The shell 31 is provided with an oil discharge channel 310 and a water inlet hole 311. The oil discharge channel 310 is connected to the oil discharge hole 111. The water outlet end of the water pump 22 is connected to the nozzle 21 and the water inlet hole 311. The water inlet end of the water pump 22 is connected to the tap water pipe or the water storage device through the water inlet pipe 24. Among them, the regulating component 3 is arranged at the position below the wind cabinet component 1, and the oil discharge channel 310 on the left side of the regulating component 3 is connected to the oil discharge hole 111 at the bottom of the volute 11. The regulating component 32 can close or open the oil discharge channel 310 under the action of the water outlet pressure of the water pump 22 to realize water storage or drainage of the volute 11. Preferably, the water pump 22 can directly pump in water or pump in a cleaning liquid after adding a detergent, preferably a cleaning liquid, which is referred to as washing liquid for the convenience of description in this application. Most of the washing liquid pumped out by the water pump 22 can enter the nozzle 21 and enter the volute 11 after passing through the impeller 12, and another part of the washing liquid can enter the housing 31 through the water inlet hole 311. Since the water outlet end of the water pump 22 has a certain water outlet pressure, it can provide power to the regulating component 32, that is, the washing liquid entering the housing 31 can push the regulating component 32 to move.

[0079] When the range hood 5 needs to be cleaned, the water pump 22 is started, and the cleaning liquid enters the nozzle 21 and the housing 31 through the water pump 22. The cleaning liquid in the housing 31, under the action of the water pressure of the water pump 22, pushes the control component 32 to move in the direction of the oil discharge channel 310 and closes the oil discharge channel 310, which is equivalent to closing the oil discharge hole 111 on the volute 11, realizing the water storage process of the volute 11, and storing water at the bottom of the volute 11, increasing the contact area and contact time between the volute 11 and the impeller 12 and the water. Under the traction of the high-speed rotating airflow of the impeller and its own gravity, the water at the bottom of the volute 11 will form a tidal surfing effect, flushing the impeller 12 and the inner wall of the bottom of the volute 11, thereby improving the cleaning effect. The present application can start the impeller 12 when the water pump 22 is started, or when the water storage in the volute 11 reaches the first set value, and the present application is not limited here. When the automatic cleaning function ends, the water pump 22 stops working, and the water pressure at the outlet of the water pump 22 drops to 0. When the regulating component 32 loses external driving force, it moves away from the oil drain channel 310, and then opens the oil drain channel 310, and the water, oil and washing liquid in the volute 11 can be discharged normally. This solution innovatively adopts a water storage mechanism without a driving motor. When the automatic cleaning function is started, the water outlet pressure of the water pump 22 is used to provide power to the regulating component 32 to achieve the sealing of the oil drain hole 111 and the storage of water in the volute 11; when the automatic cleaning function ends, the regulating component 32 can open the oil drain channel 310 to discharge the water, oil and washing liquid in the volute 11. For the sake of convenience of description, this application refers to the mixed liquid of oil, water and washing liquid at the bottom of the volute 11 as an oil-water mixture. This solution does not require an additional drive motor to provide power to the regulating component 32, and the cost is low. Preferably, the water circuit on the right side of the regulating component 32 and the oil circuit on the left side are separated, that is, the regulating component 32 divides the two sides of the shell 31 into water circuits and oil circuits, preventing the waste liquid discharged from the volute 11 from entering the nozzle 21 again, thereby improving the cleaning effect.

[0080] In order to further improve the cleaning rate of the volute 11 and the impeller 12, the water storage time in the volute 11 and the rotation time of the impeller 12 can be appropriately increased. During cleaning, the impeller 12 can adopt forward and reverse modes. Compared with the impeller 12 rotating in the same direction, the cleaning ability of the front and back sides of the blades on the impeller 12 can be improved, and at the same time, a larger surge can be obtained, thereby improving the cleaning ability of the inner wall of the volute 11.

[0081] In a preferred embodiment of the present invention, Figure 1-4The control assembly 32 shown includes an elastic member 321, a telescopic member 322, and a blocking member 323. The elastic member 321 is fixed to one end of the housing 31 away from the water inlet 311. The telescopic member 322 includes a first end and a second end that are arranged opposite to each other. The first end is connected to the side of the elastic member 321 close to the water inlet 311, and the second end extends in a direction away from the water inlet 311. The blocking member 323 is connected to the second end, and the blocking member 323 can be inserted into the oil discharge channel 310. The telescopic member 322 and the blocking member 323 are respectively interference fit with the housing 31. The telescopic member 322 can drive the blocking member 323 to reciprocate under the joint action of water and the elastic member 321. In this application, the elastic member 321 is a compression spring, the left side of which is fixed to the housing 31. The telescopic member 322 and the blocking member 323 are respectively interference fit with the housing 31, so as to achieve oil and water separation in the housing 31. When the automatic cleaning function is started, the water outlet pressure of the water pump 22 is used to provide power to the telescopic member 322. The telescopic member 322 moves to the left under the push of the water outlet pressure and compresses the compression spring until the blocking member 323 closes the oil discharge channel 310 and the volute 11 stores water; when the automatic cleaning function is ended, the water pressure at the water outlet of the water pump 22 drops to 0, and the water-storing telescopic member 322 drives the blocking member 323 to move to the right under the action of the elastic force of the compression spring. When the blocking member 323 is separated from the oil discharge channel 310, the water-oil-water mixture in the volute can be discharged.

[0082] In order for the sealing member 323 to seal the oil drain passage 310 and thus close the oil drain hole 111, the water pressure F0 entering the housing 31 must be greater than twice the sum of the spring force of the compression spring and the sliding resistance of the sealing member 323. This ensures smooth leftward movement of the sealing member 323. Furthermore, to ensure smooth rebound of the sealing member 323, the spring force F1 of the compression spring in the compressed position must be greater than twice the sliding resistance F2 of the sealing member 323. It should be noted that the terms "left," "right," "up," and "down" in this embodiment are based on the relative positions of the components in the accompanying drawings and are provided for ease of description only and are not intended to limit this application.

[0083] In a preferred embodiment of the present invention, Figure 1-5The housing 31 shown is provided with an annular plate 312 for mounting an elastic member 321. The telescopic member 322 includes a telescopic rod 3221 and a first sealing ring 3223. The first sealing ring 3223 is connected to the side of the telescopic rod 3221 near the water inlet 311. The telescopic rod 3221 can move through the annular plate 312. The end of the telescopic rod 3221 away from the water inlet 311 is connected to the blocking member 323. The elastic member 321 is sleeved around the outer periphery of the telescopic rod 3221 and is located between the annular plate 312 and the end of the telescopic rod 3221 near the water inlet 311. The telescopic rod 3221 has an interference fit with the interior of the housing 31 through the first sealing ring 3223. Under the action of water, the telescopic rod 3221 drives the elastic member 321 to extend and retract. The telescopic rod 3221 and the first sealing ring 3223 are connected to form a first end, and the end of the telescopic rod 3221 and the blocking member 323 are connected to form a second end. When the automatic cleaning function is started, the water outlet pressure of the water pump 22 is used to provide power to the telescopic rod 3221. The telescopic rod 3221 moves to the left under the push of the water outlet pressure and compresses the compression spring until the blocking member 323 closes the oil discharge channel 310 and the volute 11 stores water; when the automatic cleaning function is ended, the water pressure at the water outlet of the water pump 22 drops to 0, and the elastic member 321 drives the blocking member 323 to move to the right under the action of the rebound force of the compression spring. When the blocking member 323 is separated from the oil discharge channel 310, the oil-water mixture in the volute 11 can be discharged.

[0084] The specific installation process is as follows: insert the compression spring into the housing 31 from the right side of the housing 31, with the left side of the compression spring connected to the annular plate 312. Insert the telescopic rod 3221 from the right side of the housing 31. Insert the first rib 3222 on the telescopic rod 3221 into the groove on the first sealing ring 3223, securing the first sealing ring 3223 to the telescopic rod 3221. An arc-shaped groove is provided in the middle of the telescopic rod 3221, into which the third sealing ring 3224 is inserted. The third sealing ring 3224 can slide along the inner wall of the limiting cylinder 3121, sealing the limiting cylinder 3121 and the telescopic rod 3221. This prevents contact between water inside the housing 31 and the first sealing ring 3223 on the telescopic rod and oil, reduces sliding resistance inside the housing 31, and ensures the separation of water and oil.

[0085] In a preferred embodiment of the present invention, Figure 1-5 The annular plate 312 shown is provided with a limiting cylinder 3121 for guiding the telescopic rod. The telescopic rod 3221 passes through the limiting cylinder 3121 and the annular plate 312 and is connected to the blocking member 323. In this way, the limiting cylinder 3121 is used to guide the movement of the telescopic rod 3221.

[0086] The end of the telescopic rod 3221, near the water inlet 311, is equipped with a first rib 3222 for engagement with the first sealing ring 3223. The first sealing ring 3223 is sleeved around the outer periphery of the first rib 3222. The first rib 3222 strengthens the connection between the telescopic rod 3221 and the first sealing ring 3223, preventing the first sealing ring 3223 from tilting or detaching during movement of the telescopic rod 3221. Furthermore, a third sealing ring 3224 is provided between the limiting cylinder 3121 and the telescopic rod 3221. The first and third sealing rings 3223 and 3224 enhance the sealing performance of the control assembly 32, achieving oil-water separation on both sides of the control assembly 32.

[0087] In a preferred embodiment of the present invention, Figure 1-4 The sealing member 323 shown includes a plug 3231 and a second sealing ring 3232. One end of the plug 3231 is connected to the telescopic rod 3221; the other end of the plug 3231 is connected to the second sealing ring 3232. The plug 3231 forms an interference fit with the interior of the housing 31 through the second sealing ring 3232 to ensure the separation of water and oil. When the automatic cleaning function is activated, the water pressure of the water pump 22 is used to provide power to the telescopic rod 3221. Driven by the water pressure of the telescopic rod 3221, the plug 3231 moves leftward and compresses the compression spring until the plug 3231 closes the oil discharge passage 310 and the water in the volute 11 is discharged. When the automatic cleaning function ends, the water pressure at the water pump 22 outlet drops to zero. The elastic member 321, under the action of the rebound force of the compression spring, drives the plug 3231 to the right. When the plug 323 separates from the oil discharge passage 310, the water-oil-water mixture in the volute 11 can be discharged.

[0088] Specifically, during installation, the left side of the housing 31 is provided with an opening to facilitate insertion of the plug 3231 from the left side of the housing 31 and insertion of the telescopic rod 3221 from the right side of the housing 31. The plug 3231 and the telescopic rod 3221 are then threadedly connected. Furthermore, a cross slot is provided on the right side of the telescopic rod 3221 and a cross slot is provided on the left side of the plug 3231, making it convenient to assemble and tighten the plug 3231 and the telescopic rod 3221 using tools. Alternatively, a slotted groove, a 'P' slot, a hexagonal slot, a Y-shaped slot, an H-shaped slot, or the like, can be used to facilitate assembly using tools. A second rib is provided on the right side of the plug 3231, which aligns with the groove of the second sealing ring 3232, thereby securing the second sealing ring 3232 to the plug 3231 and sealing the plug 3231 and the housing 31.

[0089] In a preferred embodiment of the present invention, Figure 1-4The housing 31 shown is provided with a first through-hole 313 corresponding to the oil drain hole 111 and a second through-hole 314 for draining oil. An oil receiving pipe 315 is connected to the first through-hole 313, and an oil drain pipe 316 is connected to the second through-hole 314. The oil receiving pipe 315 communicates with the oil drain pipe 316 through the housing 31, forming an oil drain passage 310. The first through-hole 313 is located at the end of the housing 31 away from the water inlet hole 311, while the second through-hole 314 is located at the end of the housing 31 closer to the water inlet hole 311. The oil receiving pipe 315 is connected to the oil drain hole 111, allowing liquid at the bottom of the volute 11 to be discharged from the volute 11 via the oil receiving pipe 315, the first through-hole 313, the second through-hole 314, and the oil drain pipe 316. This simple connection structure allows the oil to escape from the volute 11.

[0090] In a preferred embodiment of the present invention, Figure 1-4 As shown, an opening is provided on a side of the shell 31 away from the water inlet hole 311, and a sealing block 317 is connected to the opening. The sealing block 317 is inserted into the interior of the shell 31 through the opening and extends to a position between the first through hole 313 and the second through hole 314. The sealing block 317 is provided with an oil hole 3171 connecting the first through hole 313 and the second through hole 314. The sealing member 323 can abut against a side of the sealing block 317 close to the second through hole 314 to close the oil drain channel 310. The opening facilitates the installation of the sealing member 323. After the sealing block 317 is assembled in the opening, it is connected to the oil drain channel 310 through the oil hole 3171, and the rightmost side of the sealing block 317 is located between the first through hole 313 and the second through hole 314. Preferably, the rightmost side of the sealing block 317 is located on the left side of the top opening of the second through hole 314. In this way, when the leftmost side of the plug 3231 abuts against the sealing block 317, it can seal the top of the second through hole 314, thereby achieving the purpose of closing the oil drain hole 111. The structure is simple, the processing is convenient, and the assembly efficiency of the regulating component 3 can be improved.

[0091] In a preferred embodiment of the present invention, Figure 1-4 The range hood with automatic water storage shown also includes a pressure sensor 4, a liquid level sensor, and a control system. The control system is connected to the liquid level sensor, pressure sensor 4, and water pump 22. The pressure sensor 4 is connected to the water pump 22 and the water inlet 311 and is used to determine the pressure inside the housing 31. In order for the sealing member 323 to seal the oil drain channel 310 and close the oil drain channel 111, the water pressure F0 entering the housing 11 must be greater than twice the sum of the spring force and the sliding resistance of the sealing member 323 to ensure smooth leftward movement of the sealing member 323. The liquid level sensor is connected to the volute 11 and is used to detect the liquid level at the bottom of the volute 11. The liquid level sensor monitors the water level at the bottom of the volute 11 in real time and provides feedback to the control system. The control system automatically adjusts the water pressure and liquid level in the housing 31 to set values ​​to ensure successful water storage. In addition, the control system determines the water pressure in the housing 31 or the sealing of the oil drain channel 310 based on the signals from the liquid level sensor and pressure sensor 4.

[0092] The pressure sensor 4 detects the pressure at the water inlet end of the housing 31 in real time. Here, the set pressure value at the water inlet end of the housing 31 is P0, and the measured pressure value is P1. The liquid level sensor detects the liquid level in the volute 11 in real time. During the range hood cleaning stage, the change values of the liquid level in the volute 11 within the set time interval △T respectively include the first liquid level change value △H1 and the first liquid level set value △H0. After the cleaning is completed, the change values of the liquid level in the volute 11 within the set time interval △T respectively include the second liquid level change value △H3 and the second liquid level set value △H2.

[0093] When the automatic cleaning function is started, the control system makes a judgment after receiving the pressure signal and the liquid level signal. If it is detected that △H1≤△H0 and P1≥P0, it means that the sealing performance of the oil leakage passage 310 by the plugging member 323 is good, and the water pump 22 maintains this working voltage and continues the cleaning work. If it is detected that △H1>△H0 and P1<P0, it means that the water pressure in the housing 31 is insufficient, there is water leakage in the oil leakage passage 310, and the sealing performance is poor. At this time, the control system automatically issues an instruction to increase the working voltage of the water pump 22 to increase the water outlet flow rate and pressure. When it is detected that △H1≤△H0 and P1≥P0, it means that the sealing performance of the oil leakage passage 310 by the plugging member 323 is good, and the water pump 22 maintains this working voltage and continues the cleaning work. If when the working voltage of the water pump 22 is increased to the maximum limit voltage value Umax, it is still detected that △H1>△H0 and P1<P0, it proves that there is serious water leakage in the oil passage 310 and the sealing performance does not meet the preset requirements, and the system prompts a fault and gives a fault handling suggestion. When the water pump voltage is increased to the maximum limit value, under normal circumstances, the pressure at the water inlet should be increased, and theoretically the set water pressure P2≥the set value P0. The possible reason for this water leakage situation is that the internal sliding resistance of the housing 31 increases, resulting in the oil leakage hole not being sealed, or other reasons such as the wear of the sealing ring causing water leakage. If it is considered that the water inlet pressure is insufficient and oil leakage is caused by a water pump failure or the breakage of the connecting pipe b, then it can be judged whether there is water leakage through △H1>△H0 and P1<P0, that is, the position where the fault occurs can be judged by combining the pressure at the water inlet hole 311, and the control system can quickly and accurately give a fault prompt.

[0094] After the automatic cleaning function ends, the control system makes a judgment after receiving the pressure signal and the liquid level signal. If it is detected that △H3≥△H2 and P1<P0, it means that the drainage of the oil drain hole 111 is smooth, and a normal signal is fed back to the main control system of the range hood to end the automatic cleaning program; if P1≥P0 and △H3<△H2, it indicates that the drainage of the oil drain hole 111 is not smooth, and the system prompts a fault and gives a fault handling suggestion. In theory, the set water pressure P1 should be ≥ the set value P0. In this case, the possible water leakage may be due to an increase in the internal sliding resistance of the housing 31, resulting in the compression spring being unable to push the telescopic rod 3221 to the right in time, causing the drainage of the oil drain hole 111 to be unsmooth.

[0095] In a preferred embodiment of the present invention, as Figure 1-4 shown, the range hood capable of automatically storing water further includes an adapter 33, a connecting pipe 34, a three-way pipe 35 and a fixing bracket 36. One end of the adapter 33 is detachably connected to one side of the housing 31 close to the water inlet 311; the other end of the adapter 33 is connected to the connecting pipe 34. The adapter 33 is provided with an internal thread and a water inlet, and the right side of the housing 31 is provided with an external thread. The adapter 33 and the housing 31 are threadedly connected. The connecting pipe 34 can be installed with a pressure sensor 4 for measuring the pressure of the cleaning liquid entering the interior of the housing 31. Further, to prevent the connecting pipe 34 from loosening, a boss 331 is provided at the water inlet end of the adapter 33. The boss 331 and the connecting pipe 34 are in interference fit, and then the connecting pipe 34 is fixed by using a clamp or a tie strap.

[0096] The three-way pipe 35 is connected between the connecting pipe 34, the water pump 22 and the nozzle 21. The middle position of the three-way pipe 35 is connected to the drain pipe 23 of the nozzle 21. The right side of the three-way pipe 35 is connected to the water outlet of the water pump 22. The left side of the three-way pipe 35 is connected to the connecting pipe 34. The cleaning liquid pumped out by the water pump 22 enters the nozzle 21 and the housing 31 respectively through the three-way pipe 35. Since the water outlet end of the water pump 22 has a certain water outlet pressure, it can provide power for the control component 32, that is, the cleaning liquid entering the housing 31 can push the control component 32 to move.

[0097] One end of the fixing bracket 36 is fixedly connected to the housing 31, and the other end of the fixing bracket 36 is detachably connected to the volute 11. Since the control component 3 is arranged below the air duct assembly 1, the outer circumference of the housing 31 is fixed to the bottom of the fixing bracket 36 through a rubber sheath. The top of the fixing bracket 36 is welded or bolted to the volute 11, and the fixing of the control component 3 and the volute 11 can be completed.

[0098] A control method for a range hood according to an embodiment of the present invention, as Figure 6-8 shown, the control method is applied to the above-mentioned range hood capable of automatically storing water. The control method includes:

[0099] Step 100: Start the cleaning program of the range hood; this step refers to the process in which the control system receives the user's instruction to start the cleaning program. The user can start the range hood cleaning program by pressing the cleaning function key on the range hood or through an intelligent terminal such as an APP.

[0100] Step 200: the water pump 22 starts working and delivers the cleaning liquid to the nozzle 21 and the housing 31, wherein the cleaning liquid entering the housing 31 drives the regulating component 32 to move and closes the oil discharge channel 310 under the action of water pressure; after the control system receives the start-up range hood cleaning program, the water pump 22 starts working, and most of the cleaning liquid is sprayed to the impeller 12 through the nozzle 21 to clean the impeller 12, and a small part of the cleaning liquid enters the housing 31. The cleaning liquid in the housing 31 provides the telescopic rod 3221 with power to move to the left under the action of the water outlet pressure of the water pump 22. The telescopic rod 3221 moves to the left under the push of the water outlet pressure and compresses the compression spring until the sealing member 323 closes the oil discharge channel 310, and uses the nozzle 21 to clean the impeller 12 while realizing water storage in the volute 11.

[0101] In step 300, the liquid level sensor monitors the liquid level in the volute 11 in real time, and the pressure sensor 4 monitors the water pressure inside the housing 31 in real time. The pressure sensor 4 is connected to the water pump 22 and the water inlet 311 and is used to determine the pressure inside the housing 31. To ensure that the plugging member 323 seals the oil drain passage 310 and closes the oil drain hole 111, the water pressure F0 entering the housing 31 must be greater than twice the sum of the spring force and the sliding resistance of the plugging member 323 to ensure smooth leftward movement of the plugging member 323. The liquid level sensor is connected to the volute 11 and is used to detect the liquid level at the bottom of the volute 11. This level is monitored in real time and fed back to the control system. The control system automatically adjusts the water pressure and liquid level in the housing 31 to set values ​​to ensure successful water storage.

[0102] Step 300: Based on the liquid level and pressure information, determine whether the oil drain channel 310 is leaking. If the liquid level changes little within the set time, this may be due to insufficient water pressure from the water pump 22 or oil leakage from the oil drain hole 111. In this case, increase the operating voltage of the water pump 22 to increase the water flow rate and pressure, further eliminating the possibility of leakage from the drain hole 111.

[0103] Step 400: If there is oil leakage, a fault reminder is issued and troubleshooting suggestions are given; if there is no oil leakage, the cleaning procedure is continued;

[0104] Step 500: When the cleaning is completed, the water pump 22 stops working; when the control system receives an instruction to cancel the cleaning program or the cleaning program is completed when the cleaning time is reached, the water pump 22 stops working.

[0105] Step 600: Control assembly 32 opens oil drain passage 310, draining the oil-water mixture from volute 11. When the automatic cleaning function ends and the water pressure at the water pump 22 outlet drops to zero, elastic member 321, under the rebound force of the compression spring, drives blocking member 323 to the right. When blocking member 323 separates from oil drain passage 310, the oil-water mixture from volute 11 can be drained.

[0106] This application innovatively proposes an automatic water storage cleaning solution that not only realizes the water storage function of the volute 11 but also increases the contact area and contact time between the volute 11 and impeller 12 and the cleaning liquid. Under the traction of the high-speed rotating airflow of the impeller 12 and its own gravity, the water at the bottom of the volute 11 creates a tidal surfing effect, flushing the impeller 12 and the inner wall of the bottom of the volute 11, thereby improving the cleaning effect. An innovative water storage solution without a drive motor is adopted, and the water path on the right side of the housing 31 and the oil path on the left side are separated to achieve oil-water separation. It also ensures that the friction resistance of the telescopic rod 3221 remains constant when sliding left and right, making the solution simple and reliable. The control system can use the pressure sensor 4 and the liquid level sensor to monitor the pressure and liquid level in real time and automatically adjust the water pressure and liquid level to the set values ​​to ensure successful water storage. Finally, the pressure and liquid level conditions can also be used to determine whether the oil discharge channel 310 is sealed or open, effectively improving the cleaning effect of the range hood.

[0107] In a preferred embodiment of the present invention, as shown in Figures 6-8, the first liquid level change value and the first liquid level setting value within the set time are obtained, and the pressure measurement value and the pressure setting value of the water inlet hole 311 are obtained. When the first liquid level change value is less than or equal to the first liquid level setting value and the pressure measurement value is greater than or equal to the pressure setting value, the sealing performance of the oil discharge channel 310 is good; when the first liquid level change value is greater than the first liquid level setting value, it indicates that there may be oil leakage or insufficient water pressure, and a fault reminder is issued.

[0108] In a preferred embodiment of the present invention, when the first liquid level change value is greater than the first liquid level setting value and the pressure measurement value is less than the pressure setting value, the water outlet pressure of the water pump 22 is increased. If the first liquid level change value is less than or equal to the first liquid level setting value and the pressure measurement value is greater than or equal to the pressure setting value, it indicates that the sealing of the oil discharge channel 310 is good; if the water outlet pressure of the water pump 22 is increased to the maximum value, if the first liquid level change value is still greater than the first liquid level setting value and the pressure measurement value is less than the pressure setting value, it indicates that there is oil leakage in the oil discharge channel 310.

[0109] In this application, the pressure sensor 4 detects the pressure at the water inlet end of the housing 31 in real time. Here, the set value of the pressure at the water inlet end of the housing 31 is P0, and the measured pressure value is P1; the liquid level sensor detects the liquid level in the volute 11 in real time. During the range hood cleaning stage, the change values of the liquid level in the volute 11 within the set time interval △T respectively include the first liquid level change value △H1 and the first liquid level set value △H0.

[0110] When the automatic cleaning function is started, the control system makes a judgment after receiving the pressure signal and the liquid level signal. If it is detected that △H1 ≤ △H0 and P1 ≥ P0, it means that the sealing performance of the oil leakage passage 310 by the plugging member 323 is good, and the water pump 22 maintains this working voltage and continues the cleaning work; if it is detected that △H1 > △H0 and P1 < P0, it means that the water pressure in the housing 31 is insufficient, there is water leakage in the oil leakage passage 310, and the sealing performance is poor. At this time, the control system automatically issues an instruction to increase the working voltage of the water pump 22 to increase the water output flow and pressure. When it is detected that △H1 ≤ △H0 and P1 ≥ P0, it means that the sealing performance of the oil leakage passage 310 by the plugging member 323 is good, and the water pump 22 maintains this working voltage and continues the cleaning work; if the working voltage of the water pump 22 is increased to the maximum limit voltage value Umax and it is still detected that △H1 > △H0 and P1 < P0, it proves that there is serious water leakage in the oil passage 310, and the sealing performance does not meet the preset requirements, and the system prompts a fault and gives a fault handling suggestion.

[0111] It is still detected that △H1 > △H0 and P1 < P0, which proves that there is serious water leakage in the oil passage 310, and the sealing performance does not meet the preset requirements. The system prompts a fault and gives a fault handling suggestion. When the water pump voltage is increased to the maximum limit value, under normal circumstances, the pressure at the water inlet should increase. In theory, the set water pressure P2 ≥ the set value P0. This situation of water leakage may be due to an increase in the sliding resistance inside the housing 31, resulting in the oil leakage hole not being sealed, or other reasons such as the wear of the sealing ring causing water leakage. If it is considered that the water inlet pressure is insufficient and oil leakage is caused by a water pump failure or the breakage of the connecting pipe b, at this time, △H1 > △H0 and P1 < P0 can be used to judge the location of the fault, and the control system can quickly and accurately give a fault prompt.

[0112] In a preferred embodiment of the present invention, as shown in 6-8, after the oil drain hole 111, according to the liquid level and pressure change information in the volute 11, it is judged whether the oil drain passage 310 drains smoothly; the second liquid level difference measurement value and the second liquid level difference set value within the set time are obtained; the pressure measurement value and the pressure set value of the water inlet hole 311 are obtained; if the liquid level difference measurement value is less than or equal to the liquid level difference set value and the pressure measurement value is less than the pressure difference set value, the oil drain passage 310 drains smoothly; if the liquid level difference measurement value is less than the liquid level difference set value and the pressure difference measurement value is greater than the pressure difference set value, the oil drain passage 310 does not drain smoothly, and the system prompts a fault.

[0113] In this application, the pressure sensor 4 detects the pressure at the water inlet end of the housing 31 in real time. Here, the set value of the pressure at the water inlet end of the housing 31 is P0, and the measured pressure value is P1; the liquid level sensor detects the liquid level in the volute 11 in real time. After the cleaning is completed, the change values of the liquid level in the volute 11 within the set time interval ΔT respectively include the second liquid level change value ΔH3 and the second liquid level set value ΔH2.

[0114] After the automatic cleaning function is completed, the control system makes a judgment after receiving the pressure signal and the liquid level signal. If it is detected that ΔH3≥ΔH2 and P1<P0, it means that the drainage of the oil drain hole 111 is smooth, and a normal signal is fed back to the main control system of the range hood to end the automatic cleaning program; if P1≥P0 and ΔH3<ΔH2, it indicates that the drainage of the oil drain hole 111 is not smooth, and the system prompts a fault and gives a fault handling suggestion.

[0115] After the automatic cleaning function is completed, the control system makes a judgment after receiving the pressure signal and the liquid level signal. If it is detected that ΔH3≥ΔH2 and P1<P0, it means that the drainage of the oil drain hole 111 is smooth, and a normal signal is fed back to the main control system of the range hood to end the automatic cleaning program; if P1≥P0 and ΔH3<ΔH2, it indicates that the drainage of the oil drain hole 111 is not smooth, and the system prompts a fault and gives a fault handling suggestion. In theory, it should be that the set water pressure P1≥the set value P0. In this case, the possible leakage is that the internal sliding resistance of the housing 31 increases, resulting in the compression spring being unable to push the telescopic rod 3221 to the right in time, resulting in unsmooth drainage of the oil drain hole 111.

[0116] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0117] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the embodiments of the present invention.

[0118] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0119] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible in the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A range hood capable of automatically storing water, characterized in that: include: A wind cabinet assembly (1) comprises a volute (11) and an impeller (12) located in the volute (11), wherein the volute (11) is provided with an oil drain hole (111); A cleaning assembly (2) comprising a nozzle (21) and a water pump (22) for cleaning the impeller (12), wherein the water outlet of the water pump (22) is connected to the inlet of the nozzle (21); A regulating component (3) comprising a housing (31) and a regulating assembly (32) located inside the housing (31), wherein the housing (31) is provided with an oil discharge passage (310) and a water inlet (311), wherein the water inlet (311) is connected to the water outlet of the water pump (22), and the regulating assembly (32) is elastically connected to a side of the housing (31) near the water inlet (311), and the oil discharge passage (310) is connected to the oil discharge hole (111); The regulating component (32) can close or open the oil discharge passage (310) under the action of the water outlet pressure of the water pump (22) to achieve water storage or drainage in the volute (11); The control component (32) includes: An elastic member (321) is fixedly connected to an end of the housing (31) away from the water inlet hole (311); The telescopic member (322) comprises a first end and a second end that are arranged opposite to each other, the first end being connected to a side of the elastic member (321) close to the water inlet hole (311), and the second end extending in a direction away from the water inlet hole (311); a blocking member (323), connected to the second end portion and insertable into the oil drain passage (310); The telescopic member (322) and the blocking member (323) are respectively interference-fitted with the housing (31), and the telescopic member (322) can drive the blocking member (323) to perform reciprocating motion under the combined action of water and the elastic member (321); Also includes: An adapter (33), one end of which is detachably connected to a side of the housing (31) close to the water inlet (311); A connecting pipe (34), one end of which is connected to the other end of the adapter (33); a three-way pipe (35) connected between the connecting pipe (34), the water pump (22) and the nozzle (21); A fixing frame (36) has one end fixed to the housing (31) and the other end detachably connected to the volute (11).

2. The range hood capable of automatically storing water according to claim 1, characterized in that: The housing (31) is provided with an annular plate (312) for mounting the elastic member (321), and the telescopic member (322) comprises: The telescopic rod (3221) can be moved through the annular plate (312), and one end of the telescopic rod (3221) away from the water inlet hole (311) is connected to the blocking member (323); the elastic member (321) is sleeved on the outer periphery of the telescopic rod (3221), and the elastic member (321) is located between the annular plate (312) and the end of the telescopic rod (3221) close to the water inlet hole (311); A first sealing ring (3223) is connected to a side of the telescopic rod (3221) close to the water inlet (311); The telescopic rod (3221) is interference-fitted with the first sealing ring (3223) and the interior of the housing (31), and the telescopic rod (3221) drives the elastic member (321) to perform telescopic movement under the action of water.

3. The range hood capable of automatically storing water according to claim 2, characterized in that: The annular plate (312) is provided with a limiting cylinder (3121) for guiding the telescopic rod, and the telescopic rod (3221) passes through the limiting cylinder (3121) and the annular plate (312) and is connected to the blocking member (323); A first convex rib (3222) is provided at one end of the telescopic rod (3221) close to the water inlet hole (311), and the first sealing ring (3223) is sleeved on the outer periphery of the first convex rib (3222).

4. The range hood capable of automatically storing water according to claim 2, characterized in that: The blocking member (323) comprises: A plug (3231), one end of which is connected to the telescopic rod (3221); The second sealing ring (3232) is sleeved on the other end of the plug (3231), and the plug (3231) is interference-fitted with the inside of the housing (31) through the second sealing ring (3232) to ensure separation of water and oil.

5. The range hood capable of automatically storing water according to claim 1, characterized in that: The housing (31) is provided with a first through hole (313) corresponding to the oil drain hole (111) and a second through hole (314) for draining oil. The first through hole (313) is connected to an oil receiving pipe (315), and the second through hole (314) is connected to an oil drain pipe (316). The oil receiving pipe (315) is connected to the oil drain pipe (316) through the housing (31) to form the oil drain channel (310). The first through hole (313) is located at an end of the shell (31) away from the water inlet hole (311), and the second through hole (314) is located at an end of the shell (31) close to the water inlet hole (311).

6. The range hood capable of automatically storing water according to claim 5, characterized in that: An opening is provided on a side of the housing (31) away from the water inlet hole (311), and a sealing block (317) is connected to the opening. The sealing block (317) is inserted into the interior of the housing (31) through the opening and extends to a position between the first through hole (313) and the second through hole (314). The sealing block (317) is provided with an oil hole (3171) communicating with the first through hole (313) and the second through hole (314). The blocking member (323) can abut against a side of the sealing block (317) close to the second through hole (314) to close the oil discharge channel (310).

7. The range hood capable of automatically storing water according to claim 1, characterized in that: Also includes: a pressure sensor (4), connected to the water pump (22) and the water inlet (311), for determining the pressure inside the housing (31); a liquid level sensor connected to the volute (11) and used to detect the liquid level at the bottom of the volute (11); a control system connected to the liquid level sensor, the pressure sensor (4) and the water pump (22); The control system determines the water pressure of the housing (31) or the sealing performance of the oil discharge passage (310) based on the signals of the liquid level sensor and the pressure sensor (4).

8. A range hood control method, characterized in that: The control method is applied to the range hood capable of automatically storing water according to any one of claims 1 to 7, and the control method includes: Start the range hood cleaning program; The water pump (22) starts working and delivers the cleaning liquid to the nozzle (21) and the housing (31), wherein the cleaning liquid entering the housing (31) drives the regulating component (32) to move under the action of water pressure and closes the oil discharge channel (310); The liquid level sensor detects the liquid level in the volute (11) in real time, and the pressure sensor (4) detects the water pressure inside the housing (31) in real time; judging whether the oil drain channel (310) is leaking oil based on the liquid level and pressure information; If there is oil leakage, the cleaning process will be stopped and a fault reminder will be issued; if there is no oil leakage, the cleaning process will continue; When cleaning is completed, the water pump (22) stops working; The regulating component (32) opens the oil drain channel (310) and the oil drain hole (111).

9. The range hood control method according to claim 8, characterized in that: The control method includes: Obtaining a first liquid level change value and a first liquid level setting value within a set time; Obtaining a pressure measurement value and a pressure setting value of the water inlet hole (311); When the first liquid level change value is less than or equal to the first liquid level setting value and the pressure measurement value is greater than or equal to the first pressure setting value, the sealing performance of the oil discharge channel (310) is good; When the first liquid level change value is greater than the first liquid level setting value, a fault reminder is issued.

10. The range hood control method according to claim 9, characterized in that: When the first liquid level change value is greater than the first liquid level setting value, and the pressure measurement value is less than the pressure setting value, the water outlet pressure of the water pump (22) is increased to a maximum value, while continuing to compare the relationship between the first liquid level change value and the first liquid level setting value; If the first liquid level change value is less than or equal to the first liquid level setting value, it indicates that the sealing performance of the oil discharge channel (310) is good; if the first liquid level change value is greater than the first liquid level setting value, it indicates that there is oil leakage in the oil discharge channel (310).

11. The control method of the range hood according to claim 8, characterized in that: After the oil discharge hole (111), judging whether the oil discharge passage (310) is discharging oil smoothly based on information on the liquid level and pressure changes in the volute (11); Obtain a second liquid level difference measurement value and a second liquid level difference setting value within a set time; Obtaining a pressure measurement value and a pressure setting value of the water inlet hole (311); If the liquid level difference measurement value is less than or equal to the liquid level difference setting value and the pressure measurement value is less than the pressure difference setting value, the oil discharge channel (310) discharges oil smoothly; If the liquid level difference measurement value is less than the liquid level difference setting value and the pressure difference measurement value is greater than the pressure difference setting value, the oil discharge passage (310) does not discharge oil smoothly, and the system prompts a fault.

Images