Range hood control method and device and kitchen appliance

Abstract

The invention provides a control method and device of a range hood and a kitchen appliance. The range hood comprises a table top, a fan device and an exhaust device which are arranged below the table top, and a first oil smoke sensor arranged on the table top, and a second oil smoke sensor is arranged in the exhaust device. In the process that the range hood is started and runs, the first oil smoke concentration detected by the first oil smoke sensor and the second oil smoke concentration detected by the second oil smoke sensor are obtained, and the concentration change rate is calculated based on the first oil smoke concentration. And the working gear of the fan device and the exhaust mode of the exhaust device are adjusted according to the second oil smoke concentration and the concentration change rate. In the scheme, different working gears and exhaust modes are selected according to the change rate of the oil smoke concentration generated at the front end and the size of the oil smoke concentration at the rear end, the oil smoke adsorption effect is improved, meanwhile, energy consumption is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a control method and device for a range hood and a kitchen appliance. Background Art

[0002] As people pay more and more attention to healthy eating, the cooking habit of light cooking represented by steaming and boiling is becoming more and more common, and people have also put forward new demands on cooking appliances. Traditional cooking appliances are mainly high-power stoves that can cook with high flames. High flames mean high smoke, which is the fundamental reason why range hoods and stoves have developed to the current high-power and high-air volume functions.

[0003] With the popularization of light cooking habits, the corresponding non-open flame cooking method based on electric stoves has been created. Since the heating temperature of electric stoves is lower than that of open flames, the amount of oil smoke produced by electric stoves is much lower than that of open flame stoves. In addition, due to the lower temperature, the initial rising speed of the oil smoke produced will also be reduced accordingly.

[0004] Due to the characteristics of light cooking methods, cooking stoves that integrate electric stoves and range hoods have emerged. The electric stoves and range hoods are integrated and embedded in the stove top. The fumes generated by cooking are filtered by the filter device inside the range hood and then discharged into the kitchen space.

[0005] However, the current integrated cooking stoves have a relatively simple function implementation method. In terms of exhaust control, they are only controlled based on the oil smoke generated by cooking. There are fewer factors to consider, and the control is not precise enough. There may be defects such as energy waste or incomplete oil fume filtration. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a control method and device for a range hood and a kitchen appliance, so as to improve the effect of oil fume absorption and oil fume purification.

[0007] In a first aspect, the present invention provides a control method for a range hood, the range hood comprising a table, a fan device and an exhaust device arranged under the table, and a first oil fume sensor arranged on the table, wherein a second oil fume sensor is arranged in the exhaust device;

[0008] Methods include:

[0009] During the process of starting and running the range hood, obtaining a first oil fume concentration detected by the first oil fume sensor and a second oil fume concentration detected by the second oil fume sensor;

[0010] Calculate the concentration change rate based on the first oil smoke concentration;

[0011] The working gear of the fan device and the exhaust mode of the exhaust device are adjusted according to the second oil smoke concentration and the concentration change rate.

[0012] In an optional embodiment, the exhaust device includes a first exhaust duct and a second exhaust duct, and the step of adjusting the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate includes:

[0013] According to the second oil fume concentration and the concentration change rate, the first exhaust duct in the exhaust device is controlled to be opened and the second exhaust duct is controlled to be closed, or the first exhaust duct is controlled to be closed and the second exhaust duct is controlled to be opened.

[0014] In an optional embodiment, a deodorization module is provided in the second exhaust duct;

[0015] The step of controlling the first exhaust duct in the exhaust device to open and the second exhaust duct to close according to the second oil fume concentration and the concentration change rate, or controlling the first exhaust duct to close and the second exhaust duct to open, comprises:

[0016] If the second oil smoke concentration is greater than the preset maximum concentration value and the concentration change rate is greater than the preset maximum change rate, the first exhaust duct is closed and the second exhaust duct is opened; otherwise, the first exhaust duct is opened and the second exhaust duct is closed.

[0017] In an optional embodiment, the second oil fume concentration includes the oil fume concentration detected at the first time point and the oil fume concentration detected at the second time point, the second time point being after a set time period of the first time point;

[0018] The step of adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate includes:

[0019] adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil smoke concentration and the concentration change rate detected at the first time point;

[0020] According to the second oil smoke concentration detected at the second time point, the adjustment is performed on the basis of the working gear and exhaust mode adjusted at the first time point.

[0021] In an optional embodiment, the exhaust device has a plurality of filtering gears from low to high, and the working gear includes a plurality of working gears from low to high;

[0022] The step of adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil smoke concentration and the concentration change rate detected at the first time point includes:

[0023] Compare the second oil fume concentration detected at the first time point with a preset minimum concentration value and a preset maximum concentration value to determine the concentration interval in which the second oil fume concentration detected at the first time point is located;

[0024] Compare the concentration change rate detected at the first time point with a preset minimum change rate and a preset maximum change rate to determine the change rate interval in which the concentration change rate detected at the first time point is located;

[0025] Based on the concentration interval and the change rate interval of the concentration change rate detected at the first time point, the fan device is adjusted to the corresponding target working gear, and the exhaust device is adjusted to the corresponding target filtering gear.

[0026] In an optional embodiment, the step of adjusting the working gear and exhaust mode adjusted at the first time point according to the second oil smoke concentration detected at the second time point includes:

[0027] If the concentration interval of the second oil smoke concentration detected at the second time point remains unchanged compared to the concentration interval of the second oil smoke concentration detected at the first time point, the working gear and the filtering gear adjusted at the first time point are maintained;

[0028] If the concentration range of the second oil fume concentration detected at the second time point is larger than the concentration range of the second oil fume concentration detected at the first time point, the gear is increased based on the working gear and the filtering gear adjusted at the first time point.

[0029] In an optional embodiment, a filter structure is further provided in the exhaust device, and the step of adjusting the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate includes:

[0030] The filtering gear of the filtering structure in the exhaust device is adjusted according to the second oil smoke concentration and the concentration change rate.

[0031] In an optional embodiment, the filtering structure includes a water mist generator and a photocatalyst generator.

[0032] In a second aspect, the present invention provides a control device for a range hood, the range hood comprising a table, a fan device and an exhaust device arranged under the table, and a first oil fume sensor arranged on the table, a second oil fume sensor being arranged in the exhaust device, and the device comprising:

[0033] An acquisition module, used for acquiring a first oil fume concentration detected by the first oil fume sensor and a second oil fume concentration detected by the second oil fume sensor during the process of starting and running the range hood;

[0034] A calculation module, used for calculating a concentration change rate based on the first oil smoke concentration;

[0035] The control module is used to adjust the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil smoke concentration and the concentration change rate.

[0036] In a third aspect, the present invention provides a kitchen appliance, comprising:

[0037] one or more processors;

[0038] A storage device for storing one or more programs;

[0039] When one or more programs are executed by one or more processors, the one or more processors implement any method in the foregoing embodiments.

[0040] The present invention provides a control method and device for a range hood, and a kitchen appliance. The range hood includes a countertop, a fan device and an exhaust device arranged under the countertop, and a first fume sensor arranged on the countertop, and a second fume sensor is arranged in the exhaust device. During the startup and operation of the range hood, a first fume concentration detected by the first fume sensor and a second fume concentration detected by the second fume sensor are obtained, and a concentration change rate is calculated based on the first fume concentration. The working gear of the fan device and the exhaust mode of the exhaust device are adjusted according to the second fume concentration and the concentration change rate. In this solution, different working gears and exhaust modes are selected in combination with the fume concentration change rate generated at the front end and the fume concentration at the rear end, so as to reduce energy consumption and improve user experience while improving the fume adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A schematic diagram of the structure of a range hood provided by an embodiment of the present invention;

[0043] Figure 2 Another schematic diagram of the structure of a range hood provided by an embodiment of the present invention;

[0044] Figure 3 A cross-sectional schematic diagram of a range hood provided by an embodiment of the present invention;

[0045] Figure 4 A schematic diagram of the structure of an exhaust device provided in an embodiment of the present invention;

[0046] Figure 5 A flow chart of a range hood control method provided by an embodiment of the present invention;

[0047] Figure 6A schematic diagram of a first oil smoke sensor detection provided by an embodiment of the present invention;

[0048] Figure 7 An overall logic diagram of a range hood control method provided by an embodiment of the present invention;

[0049] Figure 8 A functional module block diagram of a range hood control device provided by an embodiment of the present invention;

[0050] Fig. 9 This is a structural block diagram of a kitchen appliance provided by an embodiment of the present invention.

[0051] Icons: 1-table; 11-first oil fume sensor; 2-fan device; 21-fan box; 22-primary filter; 23-guide net; 24-fan; 241-fan front plate; 242-impeller; 243-drive motor; 3-exhaust device; 31-exhaust duct; 32-filter structure; 33-second oil fume sensor; 34-first exhaust duct; 35-second exhaust duct; 36-regulating valve; 37-deodorization module; 4-heating device; 51-acquisition module; 52-computing module; 53-control module; 61-processor; 62-storage device; 63-input device; 64-output device. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0053] Please refer to Figure 1 and Figure 2 , is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention, the range hood comprises a table top 1, a fan device 2 and an exhaust device 3 arranged under the table top 1, and in addition, a heating device 4 is also arranged under the table top 1.

[0054] A first oil fume sensor 11 is provided on the countertop 1. When cooking, the pot used for cooking is placed on the countertop 1. When the heating device 4 is turned on, the pot and the food inside are heated, and oil fume will be generated during the cooking process. The first oil fume sensor 11 is provided on the countertop 1 and next to the pot. The first oil fume sensor 11 can be used to detect the oil fume concentration generated during cooking, which can be understood as the instantaneous oil fume concentration generated during cooking. For ease of distinction, the oil fume concentration detected by the first oil fume sensor 11 is named the first oil fume concentration.

[0055] The oil smoke generated by cooking is adsorbed to the fan device 2, and the oil smoke will undergo a certain filtering process in the fan device 2.

[0056] Please refer to Figure 3The fan device 2 includes a fan box 21 and a primary filter 22, a guide net 23 and a fan 24 located in the fan box 21. The fan box 21 is provided with a fan box notch, and the fan 24 includes a fan outlet. The fan box notch corresponds to the fan outlet position, so that the oil fume gas processed by the fan device 2 can be discharged from the fan outlet and the fan box notch to the exhaust device 3 (along the exhaust device 3). Figure 3 The fan 24 further includes a fan front plate 241, an impeller 242 and a drive motor 243.

[0057] After the cooking fume gas is absorbed into the fan device 2, the fume gas passes through the guide net 23 under the action of negative pressure, and then collides with the primary filter 22, and the large fume droplets in the fume gas will be condensed on the primary filter 22. The remaining fume gas then enters the fan through the fan front plate 241 and the bottom plate space of the fan box 21. The fume gas is thrown out of the fan outlet under the action of the impeller 242 inside the fan and the fan volute.

[0058] The oil fume gas exhausted from the fan device 2 enters the exhaust device 3, which has a structure for further filtering the oil fume. After further filtering in the exhaust device 3, the oil fume gas is finally exhausted into or outside the kitchen space.

[0059] Please refer to Figure 4 The exhaust device 3 includes an exhaust pipe 31, a filter structure 32 and a second oil fume sensor 33 arranged in the exhaust pipe 31, wherein the second oil fume sensor 33 and the filter structure 32 are arranged in sequence from the inlet to the outlet of the exhaust pipe 31. The second oil fume sensor 33 can be used to detect the oil fume concentration of the oil fume gas entering the exhaust pipe 31 and before being filtered by the filter structure 32, which is named as the second oil fume concentration.

[0060] In addition, the range hood also includes a controller (not shown in the figure), which can be connected to the fan device 2, the exhaust device 3, the heating device 4, etc., and the fan device 2, the exhaust device 3, the heating device 4, etc. can be controlled by the controller.

[0061] Figure 5 This is a flow chart of a control method for a range hood provided by an embodiment of the present invention, which can achieve effective absorbing of oil smoke while reducing energy consumption by controlling the fan device 2 and the exhaust device 3 of the range hood. The method can be executed by a control device for the range hood, which can be implemented in the form of hardware and / or software, and can be configured in an electronic device such as a range hood, a computer, a server, a tablet computer or a smart phone.

[0062] Specifically, see Figure 5The control method of the range hood provided in this embodiment includes the following steps:

[0063] S11, when the range hood is started and running, obtaining a first oil fume concentration detected by the first oil fume sensor and a second oil fume concentration detected by the second oil fume sensor.

[0064] S12, calculating the concentration change rate based on the first oil smoke concentration.

[0065] S13, adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate.

[0066] When cooking is required, the range hood can be turned on to absorb the fumes generated during cooking. The range hood can be turned on by pressing an on button on the range hood, or by sending an on command to the range hood through an intelligent terminal communicating with the range hood, etc., and the implementation form is not specifically limited.

[0067] During cooking, in order to avoid the situation where the rear sensor cannot respond in advance due to the path due to the change of instantaneous oil fume concentration, resulting in high-concentration oil fume being discharged into the room, a first oil fume sensor 11 is arranged on the table 1 of the range hood and close to the pot, and the first oil fume sensor 11 can detect the instantaneous oil fume concentration generated by cooking.

[0068] In this embodiment, the first oil fume sensor 11 may be a photosensitive sensor, an infrared sensor, an electrochemical sensor, a laser sensor, etc. Such sensors can directly detect and obtain the oil fume concentration in the environment surrounding the sensor.

[0069] Alternatively, the first oil smoke sensor 11 may also be a visual sensor, such as Figure 6 As shown in , this type of sensor can collect images of oil smoke within the shooting range, identify the volume of the oil smoke area in the image, and estimate the oil smoke concentration through the volume of the identified oil smoke.

[0070] After obtaining the first oil fume concentration collected by the first oil fume sensor 11 , the concentration change rate can be calculated based on the first oil fume concentration.

[0071] The oil fume gas generated by cooking enters the exhaust device 3 after being processed by the fan device 2 . A second oil fume sensor 33 is arranged before the filter structure 32 in the exhaust device 3 . The second oil fume sensor 33 can detect the oil fume concentration of the oil fume gas entering the exhaust device 3 .

[0072] The fan device 2 of the range hood generally has multiple working gears, and the smoke extraction effect and working noise of each working gear are different. The ideal state is to adapt the most suitable working gear based on the actual situation of the oil smoke generated, so as to achieve a good balance between working noise, energy consumption and smoke extraction effect.

[0073] In addition, the exhaust device 3 also has different exhaust modes, such as different exhaust gears, different exhaust channels, etc. In different exhaust modes, the exhaust effects of the exhaust device 3 are also different.

[0074] Since the first oil fume sensor 11 is arranged at the location of the oil fume generating source, the oil fume concentration detected by the first oil fume sensor 11 helps to determine the appropriate working gear of the fan device 2. The second oil fume sensor 33 is arranged near the inlet of the exhaust device 3, and the oil fume concentration detected by the second oil fume sensor 33 helps to determine the exhaust mode of the exhaust device 3.

[0075] Based on this, in this embodiment, the working position of the fan device 2 and the exhaust mode of the exhaust device 3 are adjusted in combination with the concentration change rate calculated above and the second oil fume concentration. This allows the oil fume gas generated by cooking to be effectively absorbed at an appropriate working position, and the oil fume in the oil fume gas to be effectively filtered at an appropriate exhaust mode. In this way, a good balance between oil fume absorption, oil fume purification and energy consumption is achieved.

[0076] Since the oil fume concentration subsequently detected by the second oil fume sensor 33 may change after the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 are adjusted based on the second oil fume concentration and the concentration change rate, in order to adapt to this change, the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 also need to be adjusted accordingly.

[0077] Based on this, in this embodiment, the second oil fume concentration includes the oil fume concentration detected at the first time point and the oil fume concentration detected at the second time point, wherein the second time point is after the set time length of the first time point, and the set time length can be, for example, 10s, 15s, etc.

[0078] When adjusting the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 according to the second oil fume concentration and the concentration change rate, the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 can be adjusted according to the second oil fume concentration and the concentration change rate detected at the first time point. According to the second oil fume concentration detected at the second time point, the adjustment is performed on the basis of the working gear and the exhaust mode adjusted at the first time point.

[0079] In the above manner, after adjusting the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 based on the second oil fume concentration detected at a certain time point and the concentration change rate, the oil fume absorption effect of the fan device 2 on cooking is changed accordingly due to the change in the working gear of the fan device 2, and the concentration of the oil fume gas entering the fan device 2 and the exhaust device 3 may also change. Therefore, after a period of time, the second oil fume concentration detected by the second oil fume sensor 33 may change compared to the oil fume concentration detected at the first time point, so adjustments can be made based on the current working gear and exhaust mode to adapt to the current oil fume situation.

[0080] In this embodiment, the exhaust mode of the exhaust device 3 mainly considers the exhaust pipe 31 and the exhaust gear. Among them, the exhaust gear includes multiple exhaust gears from low to high, such as low, medium, high and other gears. The exhaust device 3 includes multiple filter structures 32, and the exhaust gear is mainly the gear of the filter structure 32. The filter structure 32 includes, for example, a water mist generator, a photocatalyst generator, etc. In addition, the exhaust device 3 may also include an activated carbon module.

[0081] Therefore, from the perspective of adjusting the exhaust gear of the exhaust device 3, when adjusting the exhaust mode of the exhaust device 3 according to the second oil fume concentration and the concentration change rate, the filtering gear of the filtering structure 32 in the exhaust device 3 is mainly adjusted according to the second oil fume concentration and the concentration change rate.

[0082] When adjusting the filtering gear of the filtering structure 32 in the exhaust device 3, the water mist generator and the photocatalyst generator can be adjusted separately, or the water mist generator and the photocatalyst generator can be adjusted as a whole. The water mist generator and the photocatalyst generator have three gears: low, medium, and high. The working current of the water mist generator and the photocatalyst generator can be controlled to adjust them to different gears.

[0083] In addition, the working gear of the fan device 2 includes multiple working gears from low to high, such as a weak gear, a strong gear, a stir-fry gear, and the like.

[0084] When adjusting the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 according to the second oil smoke concentration and the concentration change rate detected at the first time point, it can be achieved in the following manner:

[0085] The second oil fume concentration detected at the first time point is compared with a preset minimum concentration value and a preset maximum concentration value to determine the concentration range in which the second oil fume concentration detected at the first time point is located.

[0086] The concentration change rate detected at the first time point is compared with a preset minimum change rate and a preset maximum change rate to determine the change rate interval in which the concentration change rate detected at the first time point is located.

[0087] Based on the concentration interval and the change rate interval of the second oil fume concentration detected at the first time point, the fan device 2 is adjusted to the corresponding target working gear, and the exhaust device 3 is adjusted to the corresponding target filtering gear.

[0088] In this embodiment, a preset minimum concentration value and a preset maximum concentration value are preset, wherein the preset minimum concentration value is the oil fume concentration that can be absorbed when the fan device 2 is in the lowest working gear, that is, when the oil fume concentration is less than the preset minimum concentration value, the fan device 2 in the lowest working gear can absorb the generated oil fume concentration. The preset maximum concentration value is the oil fume concentration that can be absorbed when the fan device 2 is in the highest working gear.

[0089] In addition, a preset minimum change rate and a preset maximum change rate are preset, and the concentration change rate reflects the speed of change of the oil smoke concentration in a short period of time.

[0090] Specifically, for the second oil smoke concentration, it can be divided into four concentration intervals based on the preset minimum concentration value and the preset maximum concentration value, including a first concentration interval less than or equal to the preset minimum concentration value, a second concentration interval greater than the preset minimum concentration value and less than the preset maximum concentration value, a third concentration interval greater than or equal to the preset maximum concentration value and less than or equal to a set multiple of the preset maximum concentration value (the set multiple is greater than 1), and a fourth concentration interval greater than a set multiple of the preset maximum concentration value.

[0091] Similarly, for oil smoke concentration, it is divided into three change rate intervals based on the preset minimum change rate and the preset maximum change rate, including a first change rate interval less than or equal to the preset minimum change rate, a second change rate interval greater than the preset minimum change rate and less than the preset maximum change rate, and a third change rate interval greater than or equal to the preset maximum change rate.

[0092] Based on the second oil fume concentration detected at the first time point, the concentration interval in which the second oil fume concentration is located among the above-mentioned multiple concentration intervals is determined, and the change rate interval in which the detected concentration change rate is located among the above-mentioned multiple change rate intervals is determined.

[0093] The target working gear of the fan device 2 and the target filtering gear of the exhaust device 3 are determined in combination with the concentration interval and the change rate interval. For example, when the second oil fume concentration is in the first concentration interval, if the concentration change rate is in the first change rate interval, the working gear of the fan device 2 is weak and the exhaust gear of the exhaust device 3 is low; if the concentration change rate is in the second change rate interval, the working gear of the fan device 2 is strong and the exhaust gear of the exhaust device 3 is medium; if the concentration change rate is in the third change rate interval, the working gear of the fan device 2 is stir-frying and the exhaust gear of the exhaust device 3 is high.

[0094] In addition, when the second oil fume concentration is in the second concentration range, if the concentration change rate is in the first change rate range, the working gear of the fan device 2 is the strong gear and the exhaust gear of the exhaust device 3 is the low gear; if the concentration change rate is in the second change rate range, the working gear of the fan device 2 is the stir-fry gear and the exhaust gear of the exhaust device 3 is the medium gear; if the concentration change rate is in the third change rate range, the working gear of the fan device 2 is the stir-fry gear and the exhaust gear of the exhaust device 3 is the high gear.

[0095] When the second oil fume concentration is in the third concentration interval, if the concentration change rate is in the first change rate interval, the working gear of the fan device 2 is the strong gear and the exhaust gear of the exhaust device 3 is the medium gear; if the concentration change rate is in the second change rate interval, the working gear of the fan device 2 is the stir-fry gear and the exhaust gear of the exhaust device 3 is the high gear; if the concentration change rate is in the third change rate interval, the working gear of the fan device 2 is the stir-fry gear and the exhaust gear of the exhaust device 3 is the high gear (in this case, the adjustment of the exhaust duct 31 is combined).

[0096] If the second oil fume concentration is in the fourth concentration interval, when the concentration change rate is in any change rate interval, the working gear of the fan device 2 is the stir-fry gear, and the exhaust gear of the exhaust device 3 is the high gear.

[0097] The above-mentioned adjustment is an adjustment method determined based on the second oil fume concentration and concentration change rate at the first time point. On this basis, after the interval setting time, the second oil fume concentration detected at the second time point can also be obtained. The second oil fume concentration at this time may change. Therefore, it can be determined whether adjustments are needed based on the adjustment at the first time point.

[0098] Specifically, when adjusting according to the second oil smoke concentration detected at the second time point on the basis of the working gear and exhaust mode adjusted at the first time point, it can be achieved in the following manner:

[0099] If the concentration range of the second oil fume concentration detected at the second time point remains unchanged compared to the concentration range of the second oil fume concentration detected at the first time point, the working gear and the filtering gear adjusted at the first time point are maintained.

[0100] If the concentration range of the second oil fume concentration detected at the second time point is larger than the concentration range of the second oil fume concentration detected at the first time point, the gear is increased based on the working gear and the filtering gear adjusted at the first time point.

[0101] For example, at the first time point, if the second oil fume concentration is in the first concentration interval, and the concentration change rate is in the first change rate interval, the working gear of the fan device 2 is low gear, and the exhaust gear of the exhaust device 3 is low gear. At the second time point, if the second oil fume concentration is still in the first concentration interval, the working gear and the exhaust gear remain unchanged. If the second oil fume concentration is in the second concentration interval, the working gear is adjusted to high gear, and the exhaust gear is adjusted to medium gear.

[0102] It should be noted that if the working gear at the first time point is already at the highest level of stir-frying, then if the concentration range of the second oil fume concentration detected at the second time point is larger than the concentration range of the second oil fume concentration detected at the first time point, since the working gear can no longer be increased, the working gear remains at the current highest level of stir-frying.

[0103] In addition, if the filter gear is already at the high end of the highest gear at the first time point, if the concentration range of the second oil fume concentration detected at the second time point is larger than the concentration range of the second oil fume concentration detected at the first time point, since the filter gear can no longer be increased, the filter gear remains at the high end of the current highest gear.

[0104] In the above adjustment of the exhaust mode of the exhaust device 3, the adjustment is made from the filter gear of the exhaust device 3. In this embodiment, considering the further purification of the quality of the gas discharged from the exhaust device 3, the filter gear of the exhaust device 3 is adjusted. Figure 4 As shown in FIG. 3 , the exhaust device 3 includes a first exhaust pipe 34 and a second exhaust pipe 35 . The adjustment of the exhaust mode of the exhaust device 3 may also be considered from the perspective of controlling the exhaust pipe 31 .

[0105] Based on this, when adjusting the exhaust mode of the exhaust device 3 according to the second oil fume concentration and the concentration change rate, the first exhaust duct 34 in the exhaust device 3 can be opened and the second exhaust duct 35 can be closed according to the second oil fume concentration and the concentration change rate, or the first exhaust duct 34 can be controlled to be closed and the second exhaust duct 35 can be opened.

[0106] In this embodiment, a regulating valve 36 is further provided in the exhaust pipe 31, and the opening and closing of the first exhaust pipe 34 and the second exhaust pipe 35 can be adjusted by controlling the regulating valve 36. When the position of the regulating valve 36 is adjusted to point A, the second exhaust pipe 35 is closed and the first exhaust pipe 34 is opened. When the position of the regulating valve 36 is adjusted to point B, the second exhaust pipe 35 is opened and the first exhaust pipe 34 is closed.

[0107] Compared with the first exhaust duct 34, the second exhaust duct 35 is additionally provided with a deodorization module 37 at its outlet, and the deodorization module 37 may be an activated carbon deodorization module. The deodorization module 37 may filter the oil fume gas in the duct again, thereby removing the odor in the oil fume gas and reducing the oil fume odor, thereby improving the quality of the gas discharged from the duct to the kitchen space and improving the user experience. However, no module is provided at the outlet of the first exhaust duct 34, and the first exhaust duct 34 may be understood as a resistance-free channel.

[0108] If the second exhaust duct 35 is opened and the first exhaust duct 34 is closed, the oil fume gas needs to be filtered by the deodorization module 37 again. Although this can achieve a further filtering effect, it also increases the flow resistance of the oil fume gas, which may cause the problem of unsmooth discharge of the oil fume gas. Therefore, each time the range hood is turned on, the first exhaust duct 34 is opened and the second exhaust duct 35 is closed by default. Later, based on the actual oil fume situation, it is considered whether it is necessary to further filter the oil fume to adjust the opening and closing of the first exhaust duct 34 and the second exhaust duct 35.

[0109] Specifically, in this embodiment, when the first exhaust duct 34 and the second exhaust duct 35 are controlled according to the second oil fume concentration and the concentration change rate, if the second oil fume concentration is greater than the preset maximum concentration value and the concentration change rate is greater than the preset maximum change rate, the first exhaust duct 34 is closed and the second exhaust duct 35 is opened; otherwise, the first exhaust duct 34 is opened and the second exhaust duct 35 is closed.

[0110] In this embodiment, the above adjustment of the first exhaust duct 34 and the second exhaust duct 35 is mainly based on the second oil fume concentration and concentration change rate detected at the second time point. That is, when the adjustment is performed based on the second oil fume concentration and concentration change rate detected at the first time point, the first exhaust duct 34 is kept open and the second exhaust duct 35 is closed by default, and then it is determined whether it is necessary to switch to opening the second exhaust duct 35 and closing the first exhaust duct 34 based on the second oil fume concentration and concentration change rate detected at the second time point.

[0111] In addition, in this embodiment, the multiple exhaust gears of the exhaust device 3, such as low, medium and high, are reflected by the gear level of the filter structure 32 on the basis of opening the first exhaust duct 34 and closing the second exhaust duct 35. When the second exhaust duct 35 is opened and the first exhaust duct 34 is closed, it indicates that the oil fume concentration is relatively large and the oil fume change rate is relatively fast, so the exhaust gear is at a high level at this time.

[0112] If the adjustment of the exhaust gear and the exhaust pipe 31 is unified, it can be divided into the first exhaust mode, the second exhaust mode, the third exhaust mode and the fourth exhaust mode from low to high. Among them, the first exhaust mode is that the first exhaust pipe 34 is opened, the second exhaust pipe 35 is closed, and the filter gear is in low gear. The second exhaust mode is that the first exhaust pipe 34 is opened, the second exhaust pipe 35 is closed, and the filter gear is in medium gear. The third exhaust mode is that the first exhaust pipe 34 is opened, the second exhaust pipe 35 is closed, and the filter gear is in high gear. The fourth exhaust mode is that the first exhaust pipe 34 is closed, the second exhaust pipe 35 is opened, and the filter gear is in high gear.

[0113] In order to enable those skilled in the art to have a clearer understanding of the control method of the range hood in this embodiment, the following Figure 7 As shown in , the overall implementation logic of the control method is explained.

[0114] After the range hood is turned on, the controller can obtain the first oil fume concentration detected by the first oil fume sensor 11 at a first time point and the second oil fume concentration C detected by the second oil fume sensor 33 at a first time point. The controller calculates the concentration change rate dQ / dt based on the first oil fume concentration.

[0115] The second oil smoke concentration C detected at the first time point is compared with the preset minimum concentration value C1. If C is less than or equal to C1, adjustment is made in combination with the specific situation of dQ / dt, including the following three situations:

[0116] If dQ / dt is less than or equal to the preset minimum change rate k1, the working gear of the fan device 2 is first adjusted to a weak gear, and the exhaust mode of the exhaust device 3 is adjusted to the first exhaust mode. Then, after a set interval, the controller obtains the second oil fume concentration C' detected by the second oil fume sensor 33 at the second time point. Check whether C' is less than or equal to C1. If C' is less than or equal to C1, this state continues. If C' is greater than C1, the working gear is adjusted to a strong gear, and the exhaust mode is adjusted to the second exhaust mode.

[0117] If dQ / dt is greater than k1 and less than the preset maximum change rate k2, the working gear is first adjusted to the strong gear and the exhaust mode is adjusted to the second exhaust mode. Then, after the interval setting time, the controller obtains the second oil fume concentration C' detected by the second oil fume sensor 33 at the second time point. Check whether C' is less than or equal to C1. If C' is less than or equal to C1, this state continues. If C' is greater than C1, the working gear is adjusted to the stir-fry gear and the exhaust mode is adjusted to the third exhaust mode.

[0118] If dQ / dt is greater than or equal to k2, the working gear is adjusted to the stir-fry gear, and the exhaust mode is adjusted to the third exhaust mode. Considering that in this case, the working gear and the exhaust mode are both at a higher gear, after the adjustment at the first time point, the subsequent oil fume absorption effect and filtering effect are better. Therefore, in this case, the working gear and exhaust mode can be continuously used.

[0119] In addition, if C is greater than C1 and less than C2, then the adjustment is made based on the specific situation of dQ / dt, including the following three situations:

[0120] If dQ / dt is less than or equal to the preset minimum change rate k1, the working gear of the fan device 2 is first adjusted to the strong gear, and the exhaust mode of the exhaust device 3 is adjusted to the first exhaust mode. Then, after the interval setting time, the controller obtains the second oil fume concentration C' detected at the second time point. Check whether C' is less than or equal to C2. If C' is less than or equal to C2, this state continues. If C' is greater than C2, the working gear is adjusted to the stir-fry gear, and the exhaust mode is adjusted to the second exhaust mode.

[0121] If dQ / dt is greater than k1 and less than k2, the working gear is first adjusted to the stir-fry gear and the exhaust mode is adjusted to the second exhaust mode. Then, after the interval setting time, the controller obtains the second oil fume concentration C' detected at the second time point. Check whether C' is less than or equal to C2. If C' is less than or equal to C2, this state continues. If C' is greater than C2, the working gear is adjusted to the stir-fry gear and the exhaust mode is adjusted to the third exhaust mode.

[0122] If dQ / dt is greater than or equal to k2, the working gear is adjusted to the stir-fry gear, and the exhaust mode is adjusted to the third exhaust mode. Similar to the above, in this case, the working gear and exhaust mode can be continuously used.

[0123] If C is greater than or equal to C2 and less than or equal to the set multiple of C2 (the set multiple is greater than 1), then adjust it according to the specific situation of dQ / dt, including the following three situations:

[0124] If dQ / dt is less than or equal to the preset minimum change rate k1, the working gear of the fan device 2 is first adjusted to the strong gear, and the exhaust mode of the exhaust device 3 is adjusted to the second exhaust mode. Then after an interval of a set length of time, the controller obtains the second oil fume concentration C' detected at the second time point. Check whether C' is less than or equal to the set multiple of C2, and the set multiple can be 1.2 times, for example. If C' is less than or equal to the set multiple of C2, this state continues. If C' is greater than the set multiple of C2, the working gear is adjusted to the stir-fry gear, and the exhaust mode is adjusted to the third exhaust mode.

[0125] If dQ / dt is greater than k1 and less than k2, the working gear is first adjusted to the stir-fry gear, and the exhaust mode is adjusted to the third exhaust mode. Then, after the interval setting time, the controller obtains the second oil fume concentration C' detected at the second time point. Check whether C' is less than or equal to the set multiple of C2. If C' is less than or equal to the set multiple of C2, this state continues. If C' is greater than the set multiple of C2, the working gear is adjusted to the stir-fry gear, and the exhaust mode is adjusted to the fourth exhaust mode.

[0126] If dQ / dt is greater than or equal to k2, the working gear is adjusted to the stir-fry gear, and the exhaust mode is adjusted to the fourth exhaust mode. Similar to the above, in this case, the working gear and exhaust mode can be continuously used.

[0127] In addition, it should be noted that if C is greater than the set multiple of C2, when the concentration change rate dQ / dt is in any interval, the working gear of the fan device 2 is the stir-fry gear, and the exhaust mode of the exhaust device 3 is the fourth exhaust mode. On this basis, since the working gear and the exhaust mode are both the highest gear, even if the second oil fume concentration C' is higher than the concentration range of the first oil fume concentration C, the current working gear and exhaust mode are still maintained to continue working.

[0128] The control method of the range hood provided in this embodiment combines the instantaneous oil fume concentration change rate detected at the front end and the oil fume concentration detected at the rear end to determine the working gear of the fan device 2 and the exhaust mode of the exhaust device 3, thereby achieving effective absorption and effective purification of oil fume.

[0129] The exhaust mode of the exhaust device 3 is controlled mainly from two angles: the exhaust gear and the exhaust duct 31. Thus, a suitable exhaust gear is adapted based on the actual oil fume situation, and a suitable exhaust duct 31 is selected for filtering and purification to further achieve a good purification effect.

[0130] See also Figure 8An embodiment of the present invention further provides a control device for a range hood, which can be used to control the working gear and exhaust mode of the range hood, wherein the device can be implemented by software and / or hardware and is generally integrated in the control system of the range hood.

[0131] like Figure 8 As shown in FIG. 5 , the control device of the range hood includes an acquisition module 51, a calculation module 52 and a control module 53. The functions of each functional module of the control device of the range hood are respectively described in detail below.

[0132] An acquisition module 51 is used to acquire a first oil fume concentration detected by the first oil fume sensor 11 and a second oil fume concentration detected by the second oil fume sensor 33 during the process of starting and operating the range hood;

[0133] A calculation module 52, configured to calculate a concentration change rate based on the first oil smoke concentration;

[0134] The control module 53 is used to adjust the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 according to the second oil fume concentration and the concentration change rate.

[0135] The control device of the range hood provided in this embodiment can obtain the first oil fume concentration detected by the first oil fume sensor 11 and the second oil fume concentration detected by the second oil fume sensor 33 through the acquisition module 51 during the startup and operation of the range hood. The concentration change rate is calculated based on the first oil fume concentration by the calculation module 52, and the working gear of the fan device 2 and the exhaust mode of the exhaust device 3 are adjusted according to the second oil fume concentration and the concentration change rate based on the control meter module. In this solution, different working gears and exhaust modes are selected in combination with the oil fume concentration change rate generated at the front end and the oil fume concentration at the rear end, which can improve the oil fume adsorption effect while reducing energy consumption and improving user experience.

[0136] The control device of the range hood described above can execute the range hood control method provided by any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0137] Fig. 9 is a schematic diagram of the structure of a kitchen appliance provided by an embodiment of the present invention, wherein the kitchen appliance is the range hood described above, such as Fig. 9 As shown, the kitchen appliance includes one or more processors 61 and a storage device 62; the processor 61 in the device can be one or more, Fig. 9 A processor 61 is taken as an example; the storage device 62 is used to store one or more programs; the one or more programs are executed by one or more processors 61, so that one or more processors 61 implement the control method of the range hood as any one of the embodiments of the present invention.

[0138] The kitchen appliance may further include: an input device 63 and an output device 64 .

[0139] The processor 61, storage device 62, input device 63 and output device 64 in the kitchen appliance can be connected via a bus or other means. Fig. 9 The example of connecting through bus is taken in the following.

[0140] The storage device 62 in the device is a computer-readable storage medium that can be used to store one or more programs, which can be software programs, computer executable programs and modules, such as program instructions / modules corresponding to the range hood control method provided in the embodiment of the present invention. The processor 61 executes various functional applications and data processing of the terminal device by running the software programs, instructions and modules stored in the storage device 62, that is, realizing the range hood control method in the above method embodiment.

[0141] The storage device 62 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the device, etc. In addition, the storage device 62 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0142] In some examples, the storage device 62 may further include a memory remotely located relative to the processor 61, and these remote memories may be connected to the device via a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0143] The input device 63 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the device. The output device 64 may include a display device such as a display screen.

[0144] Furthermore, when one or more programs included in the above device are executed by one or more processors 61, the program performs the following operations:

[0145] During the process of starting and running the range hood, a first oil fume concentration detected by the first oil fume sensor 11 and a second oil fume concentration detected by the second oil fume sensor 33 are obtained;

[0146] Calculate the concentration change rate based on the first oil smoke concentration;

[0147] The working gear of the fan device 2 and the exhaust mode of the exhaust device 3 are adjusted according to the second oil fume concentration and the concentration change rate.

[0148] The embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by the processor 61, it is used to execute a control method for a range hood. The method includes:

[0149] During the process of starting and running the range hood, a first oil fume concentration detected by the first oil fume sensor 11 and a second oil fume concentration detected by the second oil fume sensor 33 are obtained;

[0150] Calculate the concentration change rate based on the first oil smoke concentration;

[0151] The working gear of the fan device 2 and the exhaust mode of the exhaust device 3 are adjusted according to the second oil fume concentration and the concentration change rate.

[0152] Optionally, when the program is executed by the processor 61, it can also be used to execute the range hood control method provided by any embodiment of the present invention.

[0153] The computer storage medium of the embodiment of the present invention may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable CDROM, an optical storage device, a magnetic storage device, or any suitable combination of the above. The computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device.

[0154] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to: electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0155] The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the above.

[0156] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0157] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for controlling a range hood, characterized in that: The range hood comprises a table top, a fan device and an exhaust device arranged under the table top, and a first oil fume sensor arranged on the table top, wherein a second oil fume sensor is arranged in the exhaust device; The method comprises: During the process of starting and running the range hood, obtaining a first oil fume concentration detected by the first oil fume sensor and a second oil fume concentration detected by the second oil fume sensor; Calculating a concentration change rate based on the first oil smoke concentration; The working gear of the fan device and the exhaust mode of the exhaust device are adjusted according to the second oil fume concentration and the concentration change rate.

2. The control method of the range hood according to claim 1, characterized in that: The exhaust device comprises a first exhaust pipe and a second exhaust pipe, and the step of adjusting the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate comprises: According to the second oil fume concentration and the concentration change rate, the first exhaust duct in the exhaust device is controlled to be opened and the second exhaust duct is controlled to be closed, or the first exhaust duct is controlled to be closed and the second exhaust duct is controlled to be opened.

3. The control method of the range hood according to claim 2, characterized in that: A deodorization module is provided in the second exhaust duct; The step of controlling the first exhaust duct in the exhaust device to open and the second exhaust duct to close according to the second oil fume concentration and the concentration change rate, or controlling the first exhaust duct to close and the second exhaust duct to open, comprises: If the second oil smoke concentration is greater than a preset maximum concentration value and the concentration change rate is greater than a preset maximum change rate, the first exhaust duct is closed and the second exhaust duct is opened; otherwise, the first exhaust duct is opened and the second exhaust duct is closed.

4. The control method of the range hood according to claim 1, characterized in that: The second oil smoke concentration includes the oil smoke concentration detected at the first time point and the oil smoke concentration detected at the second time point, and the second time point is after a set time period of the first time point; The step of adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate comprises: adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil smoke concentration and the concentration change rate detected at the first time point; According to the second oil smoke concentration detected at the second time point, adjustment is performed based on the working gear and the exhaust mode adjusted at the first time point.

5. The control method of the range hood according to claim 4, characterized in that: The exhaust device has a plurality of filtering gears from low to high, and the working gears include a plurality of working gears from low to high; The step of adjusting the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil smoke concentration and the concentration change rate detected at the first time point includes: Compare the second oil fume concentration detected at the first time point with a preset minimum concentration value and a preset maximum concentration value to determine a concentration range in which the second oil fume concentration detected at the first time point is located; Compare the concentration change rate detected at the first time point with a preset minimum change rate and a preset maximum change rate to determine the change rate interval in which the concentration change rate detected at the first time point is located; In combination with the concentration interval of the second oil smoke concentration detected at the first time point and the change rate interval of the concentration change rate, the fan device is adjusted to the corresponding target working gear, and the exhaust device is adjusted to the corresponding target filtering gear.

6. The control method of the range hood according to claim 5, characterized in that: The step of adjusting based on the working gear and the exhaust mode adjusted at the first time point according to the second oil smoke concentration detected at the second time point comprises: If the concentration interval of the second oil smoke concentration detected at the second time point remains unchanged compared to the concentration interval of the second oil smoke concentration detected at the first time point, then the working gear and the filtering gear adjusted at the first time point are maintained; If the concentration range of the second oil fume concentration detected at the second time point is larger than the concentration range of the second oil fume concentration detected at the first time point, the gear is increased based on the working gear and the filtering gear adjusted at the first time point.

7. The control method of the range hood according to claim 1, characterized in that: The exhaust device is further provided with a filtering structure, and the step of adjusting the exhaust mode of the exhaust device according to the second oil fume concentration and the concentration change rate comprises: The filtering gear of the filtering structure in the exhaust device is adjusted according to the second oil smoke concentration and the concentration change rate.

8. The control method of the range hood according to claim 7, characterized in that: The filtering structure comprises a water mist generator and a photocatalyst generator.

9. A control device for a range hood, characterized in that: The range hood comprises a table, a fan device and an exhaust device arranged under the table, and a first oil fume sensor arranged on the table, a second oil fume sensor is arranged in the exhaust device, and the device comprises: an acquisition module, used for acquiring, during the process of starting and running the range hood, a first oil fume concentration detected by the first oil fume sensor and a second oil fume concentration detected by the second oil fume sensor; A calculation module, used for calculating a concentration change rate based on the first oil smoke concentration; A control module is used to adjust the working gear of the fan device and the exhaust mode of the exhaust device according to the second oil smoke concentration and the concentration change rate.

10. A kitchen appliance, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 8.

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