Range hood and control method thereof

Abstract

The invention discloses an extractor hood and a control method thereof.The extractor hood comprises a machine shell, the machine shell is provided with an oil fume inlet and an oil fume treatment channel, and the oil fume inlet communicates with the oil fume treatment channel; the oil filter screen disc is rotatably mounted at the oil smoke inlet and is used for filtering liquid oil; the driving motor is installed on the machine shell, and the output end of the driving motor is connected with the oil filter screen disc so as to drive the oil filter screen disc to rotate; the heating water tank comprises a water tank body and a heater, the water tank body is installed on the machine shell, and the heater is installed in the water tank body so as to heat liquid in the water tank body; the spray pipe is installed on the machine shell, the water inlet end of the spray pipe is communicated with the heating water tank, and the water outlet end faces the oil filter screen disc. The heating water tank can heat cleaning water to flow to the spray pipe, and the heated hot water is sprayed to the oil filter screen plate through the spray pipe, so that grease on the oil filter screen plate is heated and dissolved and is washed away by sprayed water flow, and the oil filter screen plate can be cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a range hood and a control method thereof. Background Art

[0002] In the related art, the range hood achieves the first filtration of oil smoke through the oil filter mesh plate, which can intercept and filter the liquid oil in the oil smoke to prevent the oil from contaminating the subsequent gaseous oil smoke filtering device. After a certain period of use, the oil filter mesh plate will be adhered with grease, which will cause the oil filter mesh plate to rotate unbalanced, increase noise, and affect the filtering effect of oil. Summary of the invention

[0003] The main purpose of the present invention is to provide a range hood, aiming to solve the technical problem of how to ensure the filtering effect of the oil filter net plate.

[0004] To achieve the above object, the range hood proposed by the present invention comprises:

[0005] A casing, wherein the casing is provided with an oil fume inlet and an oil fume treatment channel, and the oil fume inlet is communicated with the oil fume treatment channel;

[0006] An oil filter screen, which can be rotatably mounted at the oil fume inlet to filter liquid oil;

[0007] A driving motor, wherein the driving motor is mounted on the housing, and an output end of the driving motor is connected to the oil filter screen to drive the oil filter screen to rotate;

[0008] A heating water tank, the heating water tank comprising a water tank body and a heater, the water tank body being mounted on the housing, and the heater being mounted inside the water tank body to heat the liquid in the water tank body;

[0009] A spray pipe is installed on the casing, a water inlet end of the spray pipe is connected to the heating water tank, and a water outlet end of the spray pipe is toward the oil filter screen.

[0010] Optionally, there are multiple oil fume inlets, which are spaced apart along the length direction of the casing, and the oil filter screen is installed at each of the oil fume inlets; the nozzle includes a connecting pipe and multiple nozzles connected to the connecting pipe, the connecting pipe extends along the length direction of the casing and is connected to the heating water tank, the multiple nozzles are spaced apart along the length direction of the connecting pipe, and each of the nozzles faces each of the oil filter screens.

[0011] Optionally, the casing includes a first shell plate inclined relative to the vertical direction, the oil fume inlet is opened on the first shell plate, the oil filter screen is located on the inner side of the first shell plate, the nozzle is located on the outer side of the first shell plate, the projections of the connecting pipe and the nozzle on the first shell plate are located outside the boundary of the oil fume inlet, and a water tank is provided in the casing, and the bottom side edge of the first shell plate is located above the notch of the water tank, so as to guide the water sprayed on the oil filter screen and then splashed onto the first shell plate to the water tank.

[0012] Optionally, the casing also includes a guide plate inclined relative to the vertical direction, the guide plate is located below the first shell plate, a smoke intake area connected to the oil fume inlet is formed between the guide plate and the first shell plate, the bottom side of the guide plate is located above the notch of the water tank, a smoke intake opening is formed between the top side of the guide plate and the first shell plate, the smoke intake opening is connected to the smoke intake area, the downward projection of the oil filter mesh plate and the nozzle falls on the guide plate, and the guide plate is used to receive water dripping from the oil filter mesh plate and the nozzle and guide it to the water tank.

[0013] Optionally, the housing further comprises a second housing plate parallel to and opposite to the first housing plate, the second housing plate being located on the inner side of the first housing plate, the second housing plate being provided with an oil fume outlet corresponding to the oil fume inlet, the oil filter screen being installed between the oil fume inlet and the oil fume outlet, and the top side edge of the first housing plate is connected to the top side edge of the second housing plate via a water retaining plate;

[0014] And / or, the axial direction of the spray hole of the spray head forms a first angle with the flow cross section of the oil fume inlet, and the first angle is set to 120° to 150°.

[0015] The present invention also provides a control method for a range hood, wherein the range hood comprises:

[0016] A casing, wherein the casing is provided with an oil fume inlet and an oil fume treatment channel, and the oil fume inlet is communicated with the oil fume treatment channel;

[0017] An oil filter screen, which can be rotatably mounted at the oil fume inlet to filter liquid oil;

[0018] A driving motor, wherein the driving motor is mounted on the housing, and an output end of the driving motor is connected to the oil filter screen to drive the oil filter screen to rotate;

[0019] A heating water tank, the heating water tank comprising a water tank body and a heater, the water tank body being mounted on the housing, and the heater being mounted inside the water tank body to heat the liquid in the water tank body;

[0020] A water pump, the water pump is installed on the housing, and the water inlet end of the water pump is connected to the water tank body;

[0021] A spray pipe, wherein the water inlet end of the spray pipe is connected to the water outlet end of the water pump, and the water outlet end of the spray pipe faces the oil filter screen;

[0022] The range hood has a fume treatment mode and a cleaning mode;

[0023] The control method of the range hood comprises the following steps:

[0024] After entering the cleaning mode, the heater is turned on to heat the liquid in the water tank body;

[0025] Determine that the current water temperature in the water tank body is greater than or equal to the preset water temperature;

[0026] Turn on the water pump and drive motor.

[0027] Optionally, before the step of determining whether the current water temperature in the water tank body is greater than or equal to the preset water temperature, the method further includes:

[0028] Get the current oil pollution level of the oil filter;

[0029] The preset water temperature is determined according to the current oil contamination level of the oil filter mesh disk; wherein the preset water temperature is positively correlated with the current oil contamination level of the oil filter mesh disk.

[0030] Optionally, the step of obtaining the current oil pollution level of the oil filter screen includes:

[0031] Obtain the operating parameters of the range hood in each oil fume treatment mode recorded since the range hood exited the last cleaning mode, the operating parameters including the single maximum oil fume concentration and the single operation duration;

[0032] The single maximum oil fume concentration in each oil fume treatment mode is multiplied by the single operation time to obtain the single oil contamination degree of the oil filter in each oil fume treatment mode;

[0033] The current oil contamination level of the oil filter is obtained by adding up the oil contamination levels of multiple single times of the oil filter in multiple oil fume treatment modes.

[0034] Optionally, the step of starting the water pump and the driving motor includes:

[0035] Get the current oil pollution level of the oil filter;

[0036] Determine the target power of the water pump according to the current oil contamination level of the oil filter screen, wherein the target power of the water pump is positively correlated with the current oil contamination level of the oil filter screen;

[0037] Control the water pump to run at the target power.

[0038] Optionally, the range hood further comprises a detergent adding device, the detergent adding device comprises a liquid storage container and a detergent driving pump, the liquid storage container is used to store detergent, the water inlet end of the detergent driving pump is connected to the liquid storage container, and the water outlet end is connected to the water tank body;

[0039] Before the step of starting the water pump and the driving motor, the method further includes:

[0040] Get the current oil pollution level of the oil filter;

[0041] Determining a preset amount of detergent to be added according to the current oil contamination level of the oil filter screen, wherein the preset amount of detergent to be added is positively correlated with the current oil contamination level of the oil filter screen;

[0042] Determining a preset running time of the detergent driving pump according to a preset detergent addition amount, wherein the preset running time of the detergent driving pump is positively correlated with the preset detergent addition amount;

[0043] Turn on the detergent drive pump and start timing;

[0044] The detergent drive pump is switched off after a preset operating time.

[0045] In the technical solution of the range hood of the present invention, a heating water tank is installed on the casing to heat the cleaning water to be flowed to the nozzle. The heated hot water is then sprayed to the oil filter screen through the nozzle, so that the grease on the oil filter screen can be dissolved by the heat and washed away by the sprayed water flow. The sewage after washing can flow to the sink of the casing for drainage. In this way, the oil filter screen can be cleaned to reduce the grease accumulated in the oil filter screen during long-term use, so that the rotation process of the oil filter screen can be more stable, thereby ensuring the filtering effect of the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0047] Figure 1 It is a structural schematic diagram of an embodiment of a range hood of the present invention;

[0048] Figure 2 A structural cross-sectional view of an embodiment of a range hood of the present invention;

[0049] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0050] Figure 4 for Figure 2 A partial enlarged view of the other direction at A in the middle;

[0051] Figure 5 for Figure 2 A partial enlarged view of another direction at A in the middle;

[0052] Figure 6 A schematic diagram of a flow chart of an embodiment of a method for controlling a range hood according to the present invention;

[0053] Figure 7 A schematic flow chart of another embodiment of a method for controlling a range hood according to the present invention;

[0054] Figure 8 This is a flow chart of another embodiment of the control method of a range hood of the present invention.

[0055] Description of Figure Numbers:

[0056] Label name Label name Label name 10 chassis 50 Drive motor 20 Oil filter disc 30 Heating water tank 40 Nozzle 41 Connecting pipe 42 Nozzle 11 First shell plate 12 sink 13 Deflector 131 Smoke entry area 132 Smoke inlet opening 14 Second shell plate 15 Water retaining plate

[0057] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0060] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0061] In the related art, the range hood achieves the first filtration of oil smoke through the oil filter mesh plate, which can intercept and filter the liquid oil in the oil smoke to prevent the oil from contaminating the subsequent gaseous oil smoke filtering device. After a certain period of use, the oil filter mesh plate will be adhered with grease, which will cause the oil filter mesh plate to rotate unbalanced, increase noise, and affect the filtering effect of oil.

[0062] The present invention provides a range hood, aiming to solve the technical problem of how to ensure the filtering effect of an oil filter net plate.

[0063] In the embodiment of the present invention, Figures 1 to 5 As shown, the range hood comprises: a casing 10, wherein the casing 10 is provided with an oil fume inlet and an oil fume treatment channel, wherein the oil fume inlet is communicated with the oil fume treatment channel; an oil filter screen 20, wherein the oil filter screen 20 is rotatably mounted at the oil fume inlet for filtering liquid oil; a driving motor 50, wherein the driving motor 50 is mounted on the casing 10, wherein the output end of the driving motor 50 is connected to the oil filter screen 20 to drive the oil filter screen 20 to rotate; a heating water tank 30, wherein the heating water tank 30 comprises a water tank body and a heater, wherein the water tank body is mounted on the casing 10, wherein the heater is mounted in the water tank body to heat the liquid in the water tank body; a nozzle 40, wherein the nozzle 40 is mounted on the casing 10, wherein the water inlet end of the nozzle 40 is communicated with the heating water tank 30, and the water outlet end faces the oil filter screen 20.

[0064] In this embodiment, the casing 10 is used to form the overall appearance of the range hood. The specific shape of the casing 10 is not limited, and it only needs to be provided with an oil fume inlet and an oil fume treatment channel. The oil fume inlet can be provided on the front side wall of the casing 10, or on the bottom wall of the casing 10. There is no limitation here, and it only needs to satisfy that the oil fume flowing upward can enter the oil fume treatment channel from the oil fume inlet. The oil filter mesh plate 20 is used to intercept the liquid oil in the oil fume flowing into the oil fume inlet by rotating to prevent the liquid oil from adhering to the cavity wall of the oil fume treatment channel, thereby realizing the primary filtration of the oil fume. The oil filter mesh plate 20 can be in the shape of a tray or a barrel cover. There is no limitation here, and it only needs to satisfy that the liquid oil can be filtered. The driving motor 50 is used to realize the automatic rotation of the oil filter mesh plate 20. The driving motor 50 can be suspended above the oil fume inlet through a bracket, and the oil filter disc 20 is fixedly matched with the output shaft of the driving motor 50, so that the oil filter disc 20 can be suspended at the oil fume inlet, so that the oil filter disc 20 does not need to be in contact with the housing 1, thereby reducing the resistance encountered by the oil filter disc 20 during rotation, so as to improve the rotation efficiency. The oil filter disc 20 is provided with a smoke hole. When the oil fume flows through the oil filter disc 20, the smoke will enter the oil fume treatment channel through the smoke hole, and the liquid oil will be intercepted by the oil filter disc 20 and thrown into the sewage tank by the centrifugal force of the oil filter disc 20. Since the liquid oil has a certain viscosity, the liquid oil will adhere to and accumulate on the oil filter disc 20 and condense into grease.

[0065] The heating water tank 30 is used to heat the normal temperature water to form hot water, and then spray it to the oil filter screen 20 through the nozzle 40. The water tank body is used to communicate with the water source to prepare the liquid to be used for washing the oil filter screen 20 in advance and realize automatic water replenishment. The heater is an electric heater, which is used to heat the liquid in the water tank body 30. The hot water will dissolve the grease adhering to the oil filter screen 20 and dilute the oil, thereby reducing the viscosity of the oil. While the hot water is sprayed to the oil filter screen 20, the oil filter screen 20 enters a rotating state, so that the dissolved and diluted oil will be thrown to the drain tank by the centrifugal force of the oil filter screen 20, thereby effectively cleaning the oil filter screen 20; and the rotation of the oil filter screen 20 can also make different positions of the oil filter screen 20 be washed by hot water in turn, so as to improve the cleaning effect of the oil filter screen 20. The heating water tank 30 can be installed on the top of the shell, and the nozzle 40 can be directly connected to the water tank body, or indirectly connected through other pipelines, which is not limited here.

[0066] In the technical solution of the range hood of the present invention, a heating water tank 30 is installed on the casing 10 to heat the cleaning water to be flowed to the nozzle 40. The heated hot water is then sprayed to the oil filter mesh plate 20 through the nozzle 40, so that the grease on the oil filter mesh plate 20 can be dissolved by heat and washed away by the sprayed water flow. The washed sewage can flow to the water tank 12 of the casing 10 for drainage. In this way, the oil filter mesh plate 20 can be cleaned to reduce the grease accumulated in the oil filter mesh plate 20 during long-term use, so that the rotation process of the oil filter mesh plate 20 can be more stable, thereby ensuring the filtering effect of the oil.

[0067] Specifically, Figure 1 and Figure 2 As shown, there are multiple oil fume inlets, and the multiple oil fume inlets are spaced apart along the length direction of the casing 10, and the oil filter screen 20 is installed at each of the oil fume inlets; the nozzle 40 includes a connecting pipe 41 and a plurality of nozzles 42 connected to the connecting pipe 41, and the connecting pipe 41 extends along the length direction of the casing 10 and is connected to the heating water tank 30, and the multiple nozzles 42 are spaced apart along the length direction of the connecting pipe 41, and each of the nozzles 42 faces each of the oil filter screens 20 respectively.

[0068] Multiple oil fume inlets are arranged at intervals along the length direction of the housing 10 to increase the efficiency of absorbing and treating oil fume. The connecting pipe 41 extends along the arrangement direction of the multiple oil fume inlets, and the multiple nozzles 42 are connected to the connecting pipe 41, so that hot water can be sprayed to multiple oil filter screens 20 at the same time through a heating water tank 30 to improve the cleaning efficiency of the multiple oil filter screens 20.

[0069] In practical applications, such as Figures 3 to 5 As shown, the casing 10 includes a first shell plate 11 inclined relative to the vertical direction, the oil fume inlet is opened in the first shell plate 11, the oil filter screen 20 is located on the inner side of the first shell plate 11, the nozzle 40 is located on the outer side of the first shell plate 11, the projections of the connecting pipe 41 and the nozzle 42 on the first shell plate 11 are located outside the boundary of the oil fume inlet, and a water tank 12 is provided in the casing 10, and the bottom side of the first shell plate 11 is located above the notch of the water tank 12, so as to guide the water sprayed on the oil filter screen 20 and then splashed on the first shell plate 11 to the water tank 12.

[0070] The distance between the first shell plate 11 and the back plate of the housing 10 increases gradually from bottom to top. The nozzle 42 is installed on the outside of the first shell plate 11, so that the nozzle 42 sprays water toward the oil filter screen 20 toward the inside of the oil fume inlet, so that part of the hot water that passes through the oil filter screen 20 can enter the housing 10 and then flow to the water tank 12, preventing the water sprayed by the nozzle 42 from splashing toward the outside of the range hood. The water tank 12 is arranged at the bottom of the housing 10, and is used to collect the sewage formed after the range hood cleans the oil filter screen 20 and treats the oil fume, and discharges it through the drain port. Since the oil filter screen 20 is arranged on the inside of the oil fume inlet, after the hot water is sprayed on the oil filter screen 20, it will be splashed on the inner side of the first shell plate 11 by the rotating oil filter screen 20, and then flow down along the first shell plate 11 to the water tank 12, so that the water sprayed toward the oil filter screen 20 can be prevented from being splashed to the outside of the housing 10, so as to improve the use effect of the range hood. The projections of the connecting pipe 41 and the nozzle 42 on the first shell plate 11 are located outside the boundary of the oil fume inlet, thereby preventing the connecting pipe 41 and the nozzle 42 from affecting the oil fume inlet and ensuring the oil fume inlet effect.

[0071] For example, Figures 3 to 5 As shown, the casing 10 also includes a guide plate 13 which is inclined relative to the vertical direction, and the guide plate 13 is located below the first shell plate 11, and a smoke inlet area 131 connected to the oil fume inlet is formed between the guide plate 13 and the first shell plate 11, and the bottom side of the guide plate 13 is located above the notch of the water tank 12, and a smoke inlet opening 132 is formed between the top side of the guide plate 13 and the first shell plate 11, and the smoke inlet opening 132 is connected to the smoke inlet area 131, and the downward projections of the oil filter mesh plate 20 and the nozzle 42 fall on the guide plate 13, and the guide plate 13 is used to receive water dripping from the oil filter mesh plate 20 and the nozzle 42 and guide it to the water tank 12.

[0072] The guide plate 13 can be parallel to the first shell plate 11, or can form an angle with the first shell plate 11, and there is no limitation here. The hot water sprayed by the nozzle 42 will drip downward before contacting the oil filter mesh plate 20, and the oil filter mesh plate 20 will also splash part of the flushed hot water outside the oil fume inlet, and the water attached to the oil filter mesh plate 20 will also drip downward. Since the downward projections of the nozzle 42 and the oil filter mesh plate 20 fall on the guide plate 13, the water dripping from the oil filter mesh plate 20 and the nozzle 42 can be effectively received by the guide plate 13, and then flow along the guide plate 13 to the water tank 12 to prevent water droplets from overflowing during the cleaning of the oil filter mesh plate 20. The guide plate 13 will block the oil fume inlet. Before the oil fume flows to the oil fume inlet, it needs to flow into the smoke inlet area 131 from the smoke inlet opening 132, and then flow into the oil fume inlet from the smoke inlet area 131.

[0073] Specifically, the casing 10 also includes a second shell plate 14 parallel to and opposite to the first shell plate 11, the second shell plate 14 is located on the inner side of the first shell plate 11, the second shell plate 14 is provided with an oil fume outlet corresponding to the oil fume inlet, the oil filter screen 20 is installed between the oil fume inlet and the oil fume outlet, and the top side edge of the first shell plate 11 and the top side edge of the second shell plate 14 are connected via a water retaining plate 15.

[0074] The driving motor 50 is mounted on the side of the second shell plate 14 facing away from the first shell plate 11. The second shell plate 14 can block part of the water that passes through the oil filter screen 20 to prevent hot water from directly spraying into the range hood. The water blocked by the second shell plate 14 will drip onto the first shell plate 11, and the other part will flow directly along the second shell plate 14 to the water tank 12 to achieve the diversion and collection of sewage. The water baffle 15 can block the water splashed by the oil filter screen 20 to prevent the sewage from being splashed to other locations in the casing 10. The sewage blocked by the water baffle 15 can flow to the first shell plate 11 and then flow along the first shell plate 11 to the water tank 12.

[0075] In practical applications, the axial direction of the spray hole of the spray head 42 forms a first angle with the flow cross section of the oil fume inlet, and the first angle is set to 120° to 150°, for example, it can be 120°, 125°, 130°, 135°, 140°, 145° or 150°. In this way, the contact area between the spray water flow and the oil filter screen 20 can be increased, thereby improving the cleaning effect of the oil filter screen 20.

[0076] The present invention also provides a range hood control method for controlling the range hood as described above. The specific structure of the range hood is referred to the above embodiment. Since the range hood control method adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments.

[0077] The range hood has a fume treatment mode and a cleaning mode;

[0078] like Figure 6 As shown, the control method of the range hood comprises the following steps:

[0079] S100, after entering the cleaning mode, turning on the heater to heat the liquid in the water tank body;

[0080] S200, determining that the current water temperature in the water tank body is greater than or equal to a preset water temperature;

[0081] S300 , start the water pump and the drive motor 50 .

[0082] In this embodiment, the oil fume treatment mode is the process of the range hood normally treating oil fumes. The range hood also includes a fan and an oil fume ionization device installed in the housing 10. In the oil fume treatment mode, the drive motor 50, the fan and the oil fume ionization device are all turned on. The cleaning mode is the process of the range hood cleaning the oil filter 20. In the cleaning mode, the heater, the water pump and the drive motor 50 are all turned on. The user can issue a cleaning mode command through a remote control device or through the control panel of the range hood, which is not limited here. Of course, the range hood can also automatically enter the cleaning mode after the preset conditions are met.

[0083] After receiving the cleaning instruction, the range hood will enter the cleaning working mode. In the cleaning working mode, the heater, the water pump and the drive motor 50 are turned on. The heater heats the liquid in the water tank body to a preset water temperature, such as 100°C. The water pump drives the hot water in the water tank body to the nozzle 40, and the nozzle 40 sprays the hot water onto the oil filter mesh plate 20. During the process of flushing the oil filter mesh plate 20 with hot water, the drive motor 50 drives the oil filter mesh plate 20 to rotate so that different positions of the oil filter mesh plate 20 can be flushed by hot water in turn.

[0084] The preset water temperature may be fixed or may be adjusted according to the degree of oil pollution on the oil filter plate 20 .

[0085] Specifically, before the step S200 of determining whether the current water temperature in the water tank body is greater than or equal to the preset water temperature, the method further includes:

[0086] S210, obtaining the current oil pollution level of the oil filter screen 20;

[0087] S220 , determining a preset water temperature according to the current oil contamination level of the oil filter mesh disk 20 ; wherein the preset water temperature is positively correlated with the current oil contamination level of the oil filter mesh disk 20 .

[0088] The current oil pollution degree of the oil filter 20 can be divided into a slight oil pollution degree, a moderate oil pollution degree and a heavy oil pollution degree. Different oil pollution degrees require different flushing water temperatures. The preset water temperature can correspond to the oil pollution degree of the oil filter 20 and be divided into a first water temperature, a second water temperature and a third water temperature from low to high, wherein the third water temperature is greater than the second water temperature, and the second water temperature is greater than the first water temperature. For example, the first water temperature can be 70°C to 80°C, the second water temperature can be 81°C to 90°C, and the third water temperature can be 91°C to 100°C. If the current oil pollution degree of the oil filter 20 is judged to be a slight oil pollution degree, the first water temperature is determined as the preset water temperature, and the heater heats the water temperature to the first water temperature. If the current oil pollution degree of the oil filter 20 is judged to be a moderate oil pollution degree, the second water temperature is determined as the preset water temperature, and the heater heats the water temperature to the second water temperature. If the current oil pollution degree of the oil filter screen 20 is judged to be heavy oil pollution, the third water temperature is determined as the preset water temperature, and the heater heats the water temperature to the third water temperature. In this way, the operating power and operating time of the heater can be reasonably controlled on the premise of ensuring that the grease on the oil filter screen 20 is dissolved and rinsed clean, so as to achieve energy saving and emission reduction.

[0089] The current oil contamination level of the oil filter 20 can be directly detected and obtained by a detection device, or it can be comprehensively calculated based on the oil fume concentration and operating time experienced by the oil filter 20 in the previous oil fume treatment mode.

[0090] For example, Figure 7 As shown, the step S210 of obtaining the current oil pollution level of the oil filter screen 20 includes:

[0091] S211, obtaining the operating parameters of each oil fume treatment mode recorded since the range hood exited the last cleaning mode, the operating parameters including a single maximum oil fume concentration and a single operating time;

[0092] S212, multiplying the single maximum oil fume concentration in each oil fume treatment mode by the single operation time to obtain the single oil pollution degree of the oil filter 20 in each oil fume treatment mode;

[0093] S213 , adding up the multiple single oil contamination levels of the oil filter 20 in multiple oil fume treatment modes to obtain the current oil contamination level of the oil filter 20 .

[0094] After the range hood exits the cleaning mode each time, it will repeatedly operate in the oil fume treatment mode until entering the next cleaning mode. The operating parameters of each oil fume treatment mode will be recorded, including the single maximum oil fume concentration and the single operation time, wherein the single maximum oil fume concentration is the maximum oil fume concentration that can be detected by the oil fume sensor in each oil fume treatment mode. The oil filter 20 will accumulate a certain degree of oil pollution in each oil fume treatment mode. The greater the single maximum oil fume concentration, the more oil pollution the oil filter 20 accumulates in this oil fume treatment mode; the longer the single operation time, the more oil pollution the oil filter 20 accumulates in this oil fume treatment mode. The oil pollution accumulated by the oil filter 20 in each oil fume treatment mode can be defined as the single oil pollution degree, and the single oil pollution degree is positively correlated with the single maximum oil fume concentration and the single operation time. The product of the single maximum oil fume concentration and the single operation time is used as the single oil pollution degree of the oil filter 20 in each oil fume treatment mode, which can accurately reflect the influence of the single maximum oil fume concentration and the single operation time on the single oil pollution degree of the oil filter 20. The current oil pollution degree of the oil filter 20 is obtained by adding up the multiple single oil pollution degrees of the oil filter 20 in multiple oil fume treatment modes, that is, the total oil pollution degree accumulated between the current cleaning mode and the last cleaning mode.

[0095] Specifically, the step S300 of starting the water pump and the drive motor 50 includes:

[0096] S310, obtaining the current oil pollution level of the oil filter screen 20;

[0097] S320, determining a target power of the water pump according to the current oil contamination level of the oil filter mesh disk 20, wherein the target power of the water pump is positively correlated with the current oil contamination level of the oil filter mesh disk 20;

[0098] S330: Control the water pump to operate at the target power.

[0099] The method for obtaining the current oil pollution degree of the oil filter mesh disk 20 can refer to the above embodiment, and will not be repeated here. It can be understood that the heavier the current oil pollution degree of the oil filter mesh disk 20, the higher the flow rate of the water flow required to be sprayed by the nozzle 40, so as to fully flush the grease on the oil filter mesh disk 20. The operating power of the water pump will directly affect the water spraying flow rate of the nozzle 40, that is, the higher the operating power of the water pump, the higher the water spraying flow rate of the nozzle 40, and the greater the flushing force on the oil filter mesh disk 20. For example, the current oil pollution degree of the oil filter mesh disk 20 can be divided into a slight oil pollution degree, a moderate oil pollution degree and a severe oil pollution degree, and the target power of the water pump can be divided into a first power, a second power and a third power corresponding to the current oil pollution degree of the oil filter mesh disk 20, wherein the third power is greater than the second power, and the second power is greater than the first power. If it is determined that the current oil pollution degree of the oil filter mesh disk 20 is a slight oil pollution degree, the first power is determined as the target power, and the water pump can be operated at the first power. If the current oil pollution level of the oil filter mesh 20 is determined to be moderate, the second power is determined as the target power, and the water pump operates at the first power. If the current oil pollution level of the oil filter mesh 20 is determined to be heavy, the third power is determined as the target power, and the water pump operates at the first power. In this way, the operating power of the water pump can be reasonably controlled on the premise of ensuring that the grease on the oil filter mesh 20 is rinsed clean, so as to achieve energy saving and emission reduction.

[0100] The range hood further comprises a detergent adding device, which comprises a liquid storage container and a detergent driving pump, wherein the liquid storage container is used to store detergent, and the water inlet end of the detergent driving pump is connected to the liquid storage container, and the water outlet end is connected to the water tank body;

[0101] In practical applications, such as Figure 8 As shown, before the step S300 of starting the water pump and the drive motor 50, the following steps are also included:

[0102] S241, obtaining the current oil pollution level of the oil filter screen 20;

[0103] S242, determining a preset amount of detergent to be added according to the current oil pollution level of the oil filter mesh disk 20, wherein the preset amount of detergent to be added is positively correlated with the current oil pollution level of the oil filter mesh disk 20;

[0104] S243, determining a preset operating time of the detergent driving pump according to a preset detergent addition amount, wherein the preset operating time of the detergent driving pump is positively correlated with the preset detergent addition amount;

[0105] S244, start the detergent drive pump and start timing;

[0106] S245, shutting off the detergent drive pump after a preset running time.

[0107] The detergent can be mixed with the water in the water tank body to form a cleaning liquid, which can more easily and fully wash away the grease on the oil filter mesh disk 20, thereby improving the cleaning efficiency and cleaning effect of the oil filter mesh disk 20. The method for obtaining the current oil pollution level of the oil filter mesh disk 20 can refer to the above embodiment and will not be repeated here. It can be understood that the heavier the current oil pollution level of the oil filter mesh disk 20, the more detergent is required. The preset running time of the detergent drive pump can directly affect the amount of detergent added. The longer the preset running time, the more detergent is added to the water tank body, and the more obvious the cleaning effect of the oil filter mesh disk 20. Of course, when the current oil pollution level of the oil filter mesh disk 20 is low enough, the amount of detergent added can be zero, and the detergent drive pump does not need to run at this time, that is, the preset running time of the detergent drive pump is also zero.

[0108] For example, the current oil pollution degree of the oil filter 20 can be divided into a slight oil pollution degree, a moderate oil pollution degree and a heavy oil pollution degree, and the amount of detergent added can be divided into a first addition amount, a second addition amount and a third addition amount corresponding to the current oil pollution degree of the oil filter 20, wherein the third addition amount is greater than the second addition amount, the second addition amount is greater than the first addition amount, and the first addition amount can be zero. The preset operating time of the detergent driving pump can be divided into a first operating time, a second operating time and a third operating time corresponding to the detergent addition amount, wherein the third operating time is greater than the second operating time, the second operating time is greater than the first operating time, and the first operating time can be zero.

[0109] If the current oil contamination level of the oil filter mesh 20 is judged to be a slight oil contamination level, the first operation time is determined as the preset operation time, and the detergent driving pump is turned off after running the first operation time. If the current oil contamination level of the oil filter mesh 20 is judged to be a moderate oil contamination level, the second operation time is determined as the preset operation time, and the detergent driving pump is turned off after running the second operation time. If the current oil contamination level of the oil filter mesh 20 is judged to be a heavy oil contamination level, the third operation time is determined as the preset operation time, and the detergent driving pump is turned off after running the third operation time. In this way, the amount of detergent can be reasonably controlled to reduce the waste of detergent while ensuring that the grease on the oil filter mesh 20 is rinsed clean.

[0110] It should be noted that after adding the detergent to the water tank body, waiting for a while to allow the detergent and water to be fully mixed to form a cleaning liquid will have a better cleaning effect. When the range hood just enters the cleaning mode, it takes a certain amount of time for the heater to heat the room temperature water in the water tank body to the preset temperature. Therefore, turning on the detergent drive pump while turning on the heater can make full use of the heating time of the water in the water tank body to fully mix the detergent and water, thereby further improving the cleaning efficiency of the oil filter 20.

[0111] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A range hood, characterized in that: include: A casing, wherein the casing is provided with an oil fume inlet and an oil fume treatment channel, and the oil fume inlet is communicated with the oil fume treatment channel; An oil filter screen, which can be rotatably mounted at the oil fume inlet to filter liquid oil; A driving motor, wherein the driving motor is mounted on the housing, and an output end of the driving motor is connected to the oil filter screen to drive the oil filter screen to rotate; A heating water tank, the heating water tank comprising a water tank body and a heater, the water tank body being mounted on the housing, and the heater being mounted inside the water tank body to heat the liquid in the water tank body; A spray pipe is installed on the casing, a water inlet end of the spray pipe is connected to the heating water tank, and a water outlet end of the spray pipe is toward the oil filter screen.

2. The range hood according to claim 1, characterized in that: There are multiple oil fume inlets, which are spaced apart along the length direction of the casing, and the oil filter screen is installed at each of the oil fume inlets; the nozzle includes a connecting pipe and multiple nozzles connected to the connecting pipe, the connecting pipe extends along the length direction of the casing and is connected to the heating water tank, and the multiple nozzles are spaced apart along the length direction of the connecting pipe, and each of the nozzles faces each of the oil filter screens.

3. The range hood according to claim 2, characterized in that: The casing includes a first shell plate inclined relative to the vertical direction, the oil fume inlet is opened on the first shell plate, the oil filter screen is located on the inner side of the first shell plate, the nozzle is located on the outer side of the first shell plate, the projections of the connecting pipe and the nozzle on the first shell plate are located outside the boundary of the oil fume inlet, and a water tank is provided in the casing, and the bottom side edge of the first shell plate is located above the notch of the water tank, so as to guide the water sprayed on the oil filter screen and then splashed onto the first shell plate to the water tank.

4. The range hood according to claim 3, characterized in that: The casing also includes a guide plate inclined relative to the vertical direction, the guide plate is located below the first shell plate, a smoke intake area connected to the oil fume inlet is formed between the guide plate and the first shell plate, the bottom side of the guide plate is located above the notch of the water tank, a smoke intake opening is formed between the top side of the guide plate and the first shell plate, the smoke intake opening is connected to the smoke intake area, the downward projection of the oil filter mesh plate and the nozzle falls on the guide plate, and the guide plate is used to receive water dripping from the oil filter mesh plate and the nozzle and guide it to the water tank.

5. The range hood according to claim 3, characterized in that: The housing further comprises a second housing plate parallel to and opposite to the first housing plate, the second housing plate being located on the inner side of the first housing plate, the second housing plate being provided with an oil smoke outlet corresponding to the oil smoke inlet, the oil filter net plate being installed between the oil smoke inlet and the oil smoke outlet, and the top side edge of the first housing plate being connected to the top side edge of the second housing plate via a water retaining plate; And / or, the axial direction of the spray hole of the spray head forms a first angle with the flow cross section of the oil fume inlet, and the first angle is set to 120° to 150°.

6. A control method for a range hood, characterized in that: The range hood comprises: A casing, wherein the casing is provided with an oil fume inlet and an oil fume treatment channel, and the oil fume inlet is communicated with the oil fume treatment channel; An oil filter screen, which can be rotatably mounted at the oil fume inlet to filter liquid oil; A driving motor, wherein the driving motor is mounted on the housing, and an output end of the driving motor is connected to the oil filter screen to drive the oil filter screen to rotate; A heating water tank, the heating water tank comprising a water tank body and a heater, the water tank body being mounted on the housing, and the heater being mounted inside the water tank body to heat the liquid in the water tank body; A water pump, the water pump is installed on the housing, and the water inlet end of the water pump is connected to the water tank body; A spray pipe, wherein the water inlet end of the spray pipe is connected to the water outlet end of the water pump, and the water outlet end of the spray pipe faces the oil filter screen; The range hood has a fume treatment mode and a cleaning mode; The control method of the range hood comprises the following steps: After entering the cleaning mode, the heater is turned on to heat the liquid in the water tank body; Determine that the current water temperature in the water tank body is greater than or equal to the preset water temperature; Turn on the water pump and drive motor.

7. The control method of the range hood according to claim 6, characterized in that: Before the step of determining that the current water temperature in the water tank body is greater than or equal to the preset water temperature, the method further includes: Get the current oil pollution level of the oil filter; The preset water temperature is determined according to the current oil contamination level of the oil filter mesh disk; wherein the preset water temperature is positively correlated with the current oil contamination level of the oil filter mesh disk.

8. The control method of the range hood according to claim 7, characterized in that: The step of obtaining the current oil pollution level of the oil filter screen comprises: Obtain the operating parameters of the range hood in each oil fume treatment mode recorded since the range hood exited the last cleaning mode, the operating parameters including the single maximum oil fume concentration and the single operation duration; The single maximum oil fume concentration in each oil fume treatment mode is multiplied by the single operation time to obtain the single oil contamination degree of the oil filter in each oil fume treatment mode; The current oil contamination level of the oil filter is obtained by adding up the oil contamination levels of multiple single times of the oil filter in multiple oil fume treatment modes.

9. The control method of the range hood according to claim 6, characterized in that: The steps of starting the water pump and driving the motor include: Get the current oil pollution level of the oil filter; Determine the target power of the water pump according to the current oil contamination level of the oil filter screen, wherein the target power of the water pump is positively correlated with the current oil contamination level of the oil filter screen; Control the water pump to run at the target power.

10. The control method of the range hood according to claim 6, characterized in that: The range hood further comprises a detergent adding device, which comprises a liquid storage container and a detergent driving pump, wherein the liquid storage container is used to store detergent, and the water inlet end of the detergent driving pump is connected to the liquid storage container, and the water outlet end is connected to the water tank body; Before the step of starting the water pump and the driving motor, the method further includes: Get the current oil pollution level of the oil filter; Determining a preset amount of detergent to be added according to the current oil contamination level of the oil filter screen, wherein the preset amount of detergent to be added is positively correlated with the current oil contamination level of the oil filter screen; Determining a preset running time of the detergent driving pump according to a preset detergent addition amount, wherein the preset running time of the detergent driving pump is positively correlated with the preset detergent addition amount; Turn on the detergent drive pump and start timing; The detergent drive pump is switched off after a preset operating time.

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