Range hood and range hood control method

Abstract

The present application discloses a range hood and a range hood control method, wherein cooking smoke generated during cooking enters a smoke inlet passage, and a first detector arranged in the smoke inlet passage is used to detect a first particle concentration entering the smoke inlet passage, and an internal circulation mode or an external circulation mode is selected based on a comparison result between the first particle concentration and a first preset value, thereby facilitating the switching between the internal circulation mode and the external exhaust mode, wherein an auxiliary air inlet passage is additionally arranged to be connected to the internal circulation passage, and the outlet of the auxiliary air inlet passage is located on the upstream side of the internal circulation filter element, therefore, in the internal circulation mode, the operation of the auxiliary fan in the auxiliary air inlet passage can input indoor gas into the internal circulation passage, so as to mix with the airflow in the internal circulation passage and then pass through the internal circulation filter element to filter the particles and then be discharged into the room, thereby reducing the odor concentration of the gas discharged into the room in the internal circulation mode through air mixing, reducing odor, and improving user experience.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a range hood and a range hood control method. Background Art

[0002] As an indispensable purification device in the cooking process, range hoods are widely used in thousands of households. With the development of society, people's demand for a better life has gradually increased in recent years. Traditional cooking scenes can no longer meet users' needs for social interaction, and social cooking scenes - island cooking scenes have been born. However, existing island range hoods usually provide two modes: internal circulation and external exhaust. Users choose one of the modes for installation. The two modes cannot be used at the same time, and the purification modules in the two modes are usually the same. The internal and external circulation modes are mainly reflected in whether they are discharged indoors or outdoors / public flues. The internal circulation mode is for indoor discharge, and the external exhaust mode is for outdoor discharge / public flues. However, the internal circulation mode still needs to be improved in filtering particulate matter and removing odors. Summary of the invention

[0003] The purpose of the present application is to provide a range hood and a range hood control method, which facilitates the switching between the internal circulation mode and the external exhaust mode, and at the same time can reduce the odor concentration of the gas discharged into the room under the internal circulation mode, reduce odor, and improve user experience.

[0004] The embodiments of the present application can be implemented as follows:

[0005] In a first aspect, the present invention provides a range hood, comprising a smoke inlet channel, an external exhaust channel, an internal circulation channel and an auxiliary air inlet channel;

[0006] A first detector is arranged in the smoke inlet passage, and the first detector is used to detect the first particle concentration in the smoke inlet passage;

[0007] The inlets of the external exhaust channel and the internal circulation channel are connected to the outlet of the smoke inlet channel, and an internal circulation filter is arranged in the internal circulation channel;

[0008] The inlet of the auxiliary air inlet channel is used to communicate with the room, the outlet of the auxiliary air inlet channel is communicated with the internal circulation channel, and the outlet of the auxiliary air inlet channel is located on the upstream side of the internal circulation filter element, and the auxiliary air inlet channel is connected to an auxiliary fan;

[0009] When the first particle concentration is greater than the first preset concentration value, the external exhaust channel is turned on, the internal circulation channel is blocked, the auxiliary fan is turned off, and the range hood enters the external exhaust mode;

[0010] When the first particle concentration is less than or equal to the first preset concentration value, the internal circulation channel is connected, the external exhaust channel is blocked, the auxiliary fan is turned on, and the range hood enters the internal circulation mode.

[0011] In an optional embodiment, a second detector is further provided in the external exhaust channel, and the second detector is used to detect the second particle concentration in the external exhaust channel; in the external exhaust mode, when the second particle concentration is greater than the second preset concentration value, the speed of the fan in the smoke inlet channel is increased, and when the second particle concentration is less than or equal to the second preset concentration value, the fan is maintained at the current speed;

[0012] and / or,

[0013] An external discharge valve is provided at the inlet of the external discharge channel, and an internal circulation valve is provided at the inlet of the internal circulation channel; when the first particle concentration is greater than a first preset concentration value, the external discharge valve is opened and the internal circulation valve is closed; when the first particle concentration is less than or equal to the first preset concentration value, the internal circulation valve is opened and the external discharge valve is closed;

[0014] and / or,

[0015] The auxiliary fan is located in the auxiliary air inlet channel;

[0016] and / or,

[0017] The outlet of the inner circulation channel is located at the lower side of the inlet of the auxiliary air inlet channel, and an inner circulation outlet grille is arranged at the outlet of the inner circulation channel, and the air outlet direction of the inner circulation outlet grille is inclined downward;

[0018] and / or,

[0019] The inner circulation channel and the outer discharge channel are arranged in parallel, and the inner circulation channel is located above the outer discharge channel.

[0020] In an optional embodiment, a third detector is provided in the inner circulation channel, and the third detector is used to detect the third particle concentration in the inner circulation channel;

[0021] When the first particle concentration is less than or equal to the first preset concentration value, when the third particle concentration is greater than the third preset concentration value, the auxiliary fan is turned on; when the third particle concentration is less than or equal to the third preset concentration value, the auxiliary fan is turned off.

[0022] In an optional embodiment, the first detector is also used to detect a first flow value in the smoke inlet channel;

[0023] A fourth detector is provided in the auxiliary air inlet channel, and the fourth detector is used to detect a fourth particle concentration and a second flow value in the auxiliary air inlet channel;

[0024] When the auxiliary fan is turned on, the operating state of the auxiliary fan is controlled according to the first flow value, the second flow value, the third particle concentration and the fourth particle concentration.

[0025] In an optional embodiment, in the internal circulation mode, when the auxiliary fan is turned on, the mixed concentration C is obtained according to the following formula: v :

[0026]

[0027] Among them, C v1 represents the third particle concentration, Q1 represents the first flow value, C v2 characterizes the fourth particle concentration, Q2 characterizes the second flow value;

[0028] When the mixed concentration is greater than the preset mixed concentration, the speed of the auxiliary fan is increased, and the fan in the smoke inlet channel is turned off after the preset time;

[0029] When the mixed concentration is less than or equal to the preset mixed concentration, the auxiliary fan is maintained at the current speed.

[0030] In a second aspect, the present invention provides a range hood control method, the range hood comprising a smoke inlet channel, an external exhaust channel, an internal circulation channel and an auxiliary air inlet channel; the inlets of the external exhaust channel and the internal circulation channel are connected to the outlet of the smoke inlet channel, and an internal circulation filter is provided in the internal circulation channel; the inlet of the auxiliary air inlet channel is used to connect to the room, the outlet of the auxiliary air inlet channel is connected to the internal circulation channel, and the outlet of the auxiliary air inlet channel is located at the upstream side of the internal circulation filter, and the auxiliary air inlet channel is connected to an auxiliary fan;

[0031] Methods include:

[0032] S1, obtaining a first particle concentration in the smoke inlet channel;

[0033] S2, determining whether the first particle concentration is greater than a first preset concentration value;

[0034] S3, if yes, control the external exhaust channel to be open, the internal circulation channel to be blocked, and the auxiliary fan to be turned off;

[0035] S4, if not, control the internal circulation channel to be turned on, the external exhaust channel to be blocked, and the auxiliary fan to be turned on.

[0036] In an optional embodiment, in step S1, a second particle concentration in the external discharge channel is also obtained;

[0037] After step S3, the method further comprises:

[0038] S5, determining whether the second particle concentration is greater than a second preset concentration value;

[0039] S6, if yes, increase the speed of the fan in the smoke inlet channel;

[0040] S7, if not, maintain the fan at the current speed.

[0041] In an optional embodiment, in step S1, a third particle concentration in the inner circulation channel is also obtained;

[0042] Step S4 includes:

[0043] S40, controlling the internal circulation channel to be open and the external discharge channel to be blocked;

[0044] S41, determining whether the third particle concentration is greater than a third preset concentration value;

[0045] S42, if yes, control the auxiliary fan to start;

[0046] S43, if not, control the auxiliary fan to turn off.

[0047] In an optional embodiment, in step S1, a first flow value in the smoke inlet channel, a fourth particle concentration in the auxiliary air inlet channel, and a second flow value are also obtained;

[0048] After step S42, the method further includes:

[0049] S44, controlling the operating state of the auxiliary fan according to the first flow value, the second flow value, the third particle concentration and the fourth particle concentration.

[0050] In an optional implementation, step S44 includes:

[0051] S440, determining whether the mixed concentration is greater than a preset mixed concentration;

[0052] S441, if yes, increase the speed of the auxiliary fan, and shut down the fan in the smoke inlet channel after a preset time;

[0053] S442, if not, maintain the auxiliary fan at the current speed;

[0054] Among them, the mixed concentration C is obtained according to the following formula v :

[0055]

[0056] C v1 represents the third particle concentration, Q1 represents the first flow value, C v2 represents the fourth particle concentration, and Q2 represents the second flow value.

[0057] The beneficial effects of the embodiments of the present application include:

[0058] When cooking, the cooking smoke generated enters the smoke inlet channel. The first detector arranged in the smoke inlet channel is used to detect the concentration of oil smoke particles (i.e., the first particle concentration) entering the smoke inlet channel. According to the comparison result between the first particle concentration and the first preset value, the internal circulation mode or the external circulation mode is selected to facilitate the switching between the internal circulation mode and the external exhaust mode. Since an auxiliary air inlet channel is additionally arranged to be connected with the internal circulation channel, and the outlet of the auxiliary air inlet channel is located on the upstream side of the internal circulation filter, in the internal circulation mode, the operation of the auxiliary fan in the auxiliary air inlet channel can input the indoor gas into the internal circulation channel, so as to mix with the airflow in the internal circulation channel and then pass through the internal circulation filter to filter the particles and then be discharged into the room. In this way, the odor concentration of the gas discharged into the room in the internal circulation mode is reduced by air mixing, thereby reducing the odor and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0060] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present application;

[0061] Figure 2 This is a schematic diagram of the gas circuit of the range hood according to the embodiment of the present application;

[0062] Figure 3 This is a flowchart of the range hood control method of the embodiment of the present application;

[0063] Figure 4 for Figure 3 Flow chart of sub-steps in step S4;

[0064] Figure 5 for Figure 4 Flow chart of the sub-steps in step S44.

[0065] Icons: 01-cooktop; 02-induction cooker; 03-cookware; 04-electric control box; 101-smoke inlet grille; 102-oil net; 103-oil cup; 104-arc profile; 105-smoke inlet section; 106-fan; 107-fan cavity; 201-smoke delivery section; 203-first detector; 204-expansion area; 205-expansion section filter; 206-internal circulation valve; 207-exhaust valve; 30-internal Circulation channel; 301-third detector; 302-internal circulation filter; 303-internal circulation outlet grille; 304-auxiliary inlet grille; 305-fourth detector; 306-auxiliary fan; 307-auxiliary air inlet channel; 40-external exhaust channel; 401-second detector; 402-external exhaust pipe and air outlet; 403-flexible vibration damping material; 501-cooking smoke; 502-internal circulation gas; 503-indoor gas. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0068] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0069] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0070] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0071] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0073] Combination Figure 1 and Figure 2 The embodiment of the present application discloses a range hood, which includes a shell, an electromagnetic cooker 02 and an electric control box 04. The top of the shell serves as a cooker table 01 for setting the electromagnetic cooker 02, and the electromagnetic cooker 02 is used to place pots 03 on top for users to cook.

[0074] The electric control box 04 is arranged inside the shell, and is used to store electric control components such as the controller to realize the control of the electric drive components in the entire range hood.

[0075] The housing has a smoke inlet channel, an external exhaust channel 40, an internal circulation channel 30 and an auxiliary air inlet channel 307. The inlet of the smoke inlet channel passes through the cooker table 01. A first detector 203 and a fan 106 are arranged in the smoke inlet channel. When the fan 106 is running, negative pressure is generated so that the inlet of the smoke inlet channel inhales oil smoke. The first detector 203 is used to detect the first particle concentration in the smoke inlet channel.

[0076] The inlets of the external exhaust channel 40 and the internal circulation channel 30 are connected to the outlet of the smoke inlet channel. The outlet of the external exhaust channel 40 is used to connect to the outside through the external exhaust pipe and the air outlet 402, and the outlet of the internal circulation channel 30 is used to connect to the inside of the room.

[0077] The inlet of the auxiliary air inlet channel 307 is used to communicate with the room, and the outlet of the auxiliary air inlet channel 307 is connected with the inner circulation channel 30, and the connecting point between the auxiliary air inlet channel 307 and the inner circulation channel 30 is closer to the smoke inlet channel than the inner circulation filter 302, that is, the outlet of the auxiliary air inlet channel 307 is located on the upstream side of the inner circulation filter 302, and the auxiliary air inlet channel 307 is connected to the auxiliary fan 306;

[0078] When the first particle concentration is greater than the first preset concentration value, the internal circulation channel 30 is blocked, the external exhaust channel 40 is connected, the auxiliary fan 306 is turned off, and the range hood enters the external exhaust mode;

[0079] When the first particle concentration is less than or equal to the first preset concentration value, the internal circulation channel 30 is connected, the external exhaust channel 40 is blocked, the auxiliary fan 306 is turned on, and the range hood enters the internal circulation mode.

[0080] As described above, the cooking smoke 501 generated during cooking enters the smoke inlet channel, and the first detector 203 arranged in the smoke inlet channel is used to detect the concentration of oil smoke particles entering the smoke inlet channel (i.e., the first particle concentration). According to the comparison result of the first particle concentration and the first preset value, the internal circulation mode or the external circulation mode is selected to facilitate the switching of the internal circulation mode and the external exhaust mode. Since an auxiliary air inlet channel 307 is additionally arranged to be connected to the internal circulation channel 30, and the outlet of the auxiliary air inlet channel 307 is located on the upstream side of the internal circulation filter 302, in the internal circulation mode, the indoor gas 503 can be input into the internal circulation channel 30 through the operation of the auxiliary fan 306, so as to be mixed with the airflow in the internal circulation channel 30 and then be discharged into the room as the internal circulation gas 502 after filtering the particles through the internal circulation filter 302. In this way, the odor concentration of the gas discharged into the room in the internal circulation mode is reduced by air mixing, the odor is reduced, and the user experience is improved.

[0081] It should be noted that, in order to realize selective conduction between the inner circulation channel 30 and the outer discharge channel 40, an outer discharge valve 207 may be provided at the inlet of the outer discharge channel 40, and an inner circulation valve 206 may be provided at the inlet of the inner circulation channel 30;

[0082] Thus, when the first particle concentration is greater than the first preset concentration value, the external exhaust valve 207 is opened to conduct the external exhaust channel 40, and the internal circulation valve 206 is closed to block the internal circulation channel 30, and the corresponding range hood enters the external exhaust mode;

[0083] When the first particle concentration is less than or equal to the first preset concentration value, the internal circulation valve 206 is opened to conduct the internal circulation channel 30, and the external exhaust valve 207 is closed to block the external exhaust channel 40, and the corresponding range hood enters the internal circulation mode.

[0084] The auxiliary fan 306 may be located inside the auxiliary air inlet channel 307, thereby improving the overall structural compactness of the range hood.

[0085] Of course, the auxiliary fan 306 may also be located outside the auxiliary air inlet channel 307 and connected to the auxiliary air inlet channel 307 through a pipeline.

[0086] The smoke inlet channel is divided into a smoke inlet section 105, a fan cavity 107 and a smoke delivery section 201 which are connected in sequence. A fan 106 is arranged in the fan cavity 107. The smoke inlet section 105 is located on the negative pressure side of the fan 106, and the smoke delivery section 201 is located on the positive pressure side of the fan 106. A smoke inlet grille 101 and an oil net 102 are arranged in the smoke inlet section 105. The smoke inlet grille 101 is far away from the fan 106 relative to the oil net 102. An oil cup 103 is arranged in the fan cavity 107 just below the oil net 102. A first detector 203 and an expansion section filter 205 are arranged in the smoke delivery section 201. The expansion section filter 205 is further away from the fan 106 relative to the first detector 203. The inlets of the external exhaust channel 40 and the internal circulation channel 30 are both connected to the outlet of the smoke delivery section 201.

[0087] In this way, during the cooking process, the pot 03 produces smoke containing grease, water vapor, particulate matter and odor. When the range hood is started, that is, the fan 106 is turned on, the fan 106 runs to allow the smoke to pass through the smoke inlet grille 101 and enter the smoke inlet section 105 of the smoke inlet channel. The smoke is isolated from a small amount of water vapor and grease at the smoke inlet grille 101 to prevent debris from entering the fan cavity 107. At the same time, the smoke inlet grille 101 can also play a certain rectifying role on the smoke. Subsequently, when the smoke passes through the oil net 102, the high-temperature smoke is slowed down and condensed, and part of the smoke is liquefied and drips into the lower oil cup 103 along the oil net 102. In this way, the smoke is isolated from a large amount of grease and water vapor by the oil net 102. Then the smoke enters the fan 106, and enters the smoke delivery section 201 under the action of the fan 106, and then passes through the expansion section filter 205 for filtration, and then enters the internal circulation channel 30 or the external discharge channel 40 according to the opening of the internal circulation valve 206 or the external discharge valve 207. The upstream sides of the external discharge and the internal circulation share the oil net 102 and the expansion section filter 205, that is, the oil and particulate matter purification is shared, the structure is more compact and cost-saving.

[0088] The electric control box 04 is specifically located on the side of the smoke inlet section 105. Due to the overall compactness of the range hood, the portion of the smoke inlet section 105 for installing the smoke inlet grille 101 and the oil net 102 will be narrowed. In this way, when the smoke passes through the narrowed portion of the smoke inlet section 105, angular vortices may be generated below the electric control box 04, causing flow losses. For this reason, an arc-shaped profile 104 may be provided at the lower part of the electric control box 04 to perform a flow diversion function, which can optimize the smoke flow structure, reduce flow resistance and aerodynamic noise, and prevent the generation of angular vortices.

[0089] The smoke delivery section 201 has an expansion area 204 on the upstream side of the expansion section filter 205, and the expansion area 204 gradually increases along the airflow direction. The internal circulation channel 30 and the external exhaust channel 40 are arranged in parallel, and the internal circulation channel 30 is located above the external exhaust channel 40. In this way, after the airflow passes through the fan 106 and enters the smoke delivery section 201, the air duct area is increased due to the expansion area 204. Under the condition of flow conservation, the speed of the airflow will decrease during the process of passing through the expansion area 204. In this way, the airflow can pass through the expansion section filter 205 more slowly, and the particulate matter and odor are further purified by the expansion section filter 205, thereby enhancing the filtration efficiency of the expansion section filter 205.

[0090] There is no specific limitation on the types of the expansion section filter 205 and the inner circulation filter 302. For example, the expansion section filter 205 can be a porous filter, a porous carbon block or a porous ceramic filter, etc., mainly filtering by physical filtration. The inner circulation filter 302 can be a high-performance carbon filter, etc.

[0091] The inner circulation channel 30 and the outer discharge channel 40 are separated by a flexible vibration-damping material 403, and the flexible vibration-damping material 403 also plays a role in buffering and avoiding vibration.

[0092] The outlet of the inner circulation channel 30 is located at the lower side of the inlet of the auxiliary air inlet channel 307. The inlet of the auxiliary air inlet channel 307 is provided with an auxiliary inlet grille 304. The air inlet direction of the auxiliary inlet grille 304 is horizontal. The outlet of the inner circulation channel 30 is provided with an inner circulation outlet grille 303. The air outlet direction of the inner circulation outlet grille 303 is inclined downward. In this way, the inner circulation gas 502 moves obliquely downward after being discharged through the inner circulation outlet grille 303 to prevent the inner circulation gas 502 from being directly sucked into the auxiliary air inlet channel 307.

[0093] A second detector 401 is also provided in the external exhaust channel 40, and the second detector 401 is used to detect the second particle concentration in the external exhaust channel 40; in the external exhaust mode, when the second particle concentration is greater than the second preset concentration value, it indicates that the smoke generated by the cooker 03 during cooking is large, and the smoke needs to be discharged from the cooking room as soon as possible. Therefore, the speed of the fan 106 in the smoke inlet channel is increased, and specifically, the fan 106 can be automatically or manually adjusted to the maximum gear by the user, so that the speed of the fan 106 is increased to discharge the smoke as soon as possible and reduce the indoor smoke concentration; and when the second particle concentration is less than or equal to the second preset concentration value, it indicates that the smoke generated by the cooker 03 during cooking is small, and at this time, it is only necessary to maintain the fan 106 at the current speed (current gear).

[0094] Optionally, a third detector 301 is provided in the inner circulation channel 30, and the third detector 301 is used to detect the third particle concentration in the inner circulation channel 30;

[0095] In the case where the first particle concentration is less than or equal to the first preset concentration value, when the third particle concentration is greater than the third preset concentration value, the auxiliary fan 306 is turned on, so that after the auxiliary fan 306 is running, the indoor air is sucked in and mixed with the gas located in the internal circulation channel 30 on the upstream side of the internal circulation filter 302, and then the odor is further adsorbed by the internal circulation filter 302, and then discharged into the room. In this way, the concentration of the gas odor discharged by the range hood in the internal circulation mode is reduced by air mixing; and in the case where the first particle concentration is less than or equal to the first preset concentration value, when the third particle concentration is less than or equal to the third preset concentration value, it indicates that the gas concentration on the upstream side of the internal circulation filter 302 is appropriate, and the auxiliary fan 306 does not need to be run at this time, so the auxiliary fan 306 can be turned off.

[0096] Optionally, the first detector 203 is also used to detect the first flow value in the smoke inlet channel; a fourth detector 305 is provided in the auxiliary air inlet channel 307, and the fourth detector 305 is used to detect the fourth particle concentration and the second flow value in the auxiliary air inlet channel 307;

[0097] When the auxiliary fan 306 is turned on, the operating state of the auxiliary fan 306 is controlled according to the first flow value, the second flow value, the third particle concentration and the fourth particle concentration, so as to more accurately control the auxiliary fan 306.

[0098] Specifically, when the auxiliary fan 306 is turned on, the mixed concentration C is obtained according to the following formula (1): v :

[0099] (1)

[0100] Among them, C v1 represents the third particle concentration, Q1 represents the first flow value, C v2 characterizes the fourth particle concentration, Q2 characterizes the second flow value;

[0101] When the mixed concentration is greater than the preset mixed concentration, it means that the gas concentration on the upstream side of the internal circulation filter 302 is relatively large, so it is necessary to increase the rotation speed of the auxiliary fan 306. Specifically, the gear of the auxiliary fan 306 can be adjusted to the maximum gear, so that the rotation speed of the auxiliary fan 306 will be adjusted to the maximum value, and the fan 106 in the smoke inlet channel will be turned off and then turned off after a preset time. For example, the preset time is three minutes. In this way, the delayed shutdown of the auxiliary fan 306 can discharge the residual smoke in the smoke inlet channel into the room; and when the mixed concentration is less than or equal to the preset mixed concentration, it means that the gas concentration on the upstream side of the internal circulation filter 302 is relatively small and more appropriate. Therefore, it is only necessary to maintain the auxiliary fan 306 at the current speed (current gear).

[0102] In order to realize the control of the above-mentioned fan 106, auxiliary fan 306 and various valves, the embodiment of the present application also discloses a range hood control method, which can be applied to the range hood of the above-mentioned embodiment. The range hood control method can be stored in the controller in the electric control box 04 in the form of program segments, and can be read, written and executed by the controller. Figure 3 , Figure 3 This is a flowchart of the range hood control method of the present application embodiment, wherein it should be noted that, Figure 3 The steps shown in the flowcharts may be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown here.

[0103] The above-mentioned controller is usually a central processing unit (CPU), which can be configured with a corresponding operating system and a control interface, etc. Specifically, it can be a single-chip microcomputer, DSP (Digital Signal Processing), ARM (Advanced RISC Machines, ARM processor) and other digital logic control units that can be used for automatic control. The control instructions can be loaded into the memory at any time for storage and execution. At the same time, it can have built-in CPU instruction and data memory, input and output units, power supply modules, digital simulation and other units. The specific settings can be made according to actual usage, and the embodiments of the present application are not limited to this.

[0104] Below Figure 3 The specific process shown is described in detail.

[0105] The range hood control method comprises the following steps S1-S4:

[0106] Step S1, obtaining a first particle concentration in a smoke inlet channel;

[0107] Specifically, the first particle concentration C transmitted from the first detector 203 is obtained. k1 .

[0108] Step S2, determining whether the first particle concentration is greater than a first preset concentration value;

[0109] That is, the first particle concentration C k1 and the first preset concentration value C kb The comparison is performed, and the following step S3 or step S4 is selected according to the comparison result, that is, when the judgment is yes (the first particle concentration C k1 Greater than the first preset concentration value C kb) and execute step S3, and judge as no (the first particle concentration C k1 Less than or equal to the first preset concentration value C kb ) execute step S4.

[0110] Step S3: If yes, control the external exhaust channel 40 to be open, the internal circulation channel 30 to be blocked, and the auxiliary fan 306 to be turned off.

[0111] Specifically, the first particle concentration C k1 Greater than the first preset concentration value C kb , it indicates that the smoke concentration is too high and the smoke needs to be discharged to the outside in time, so it is necessary to enter the external exhaust mode, so the control Figure 1 and Figure 2 The external exhaust valve 207 is opened, and the internal circulation valve 206 and the auxiliary fan 306 are closed.

[0112] Step S4, if not, the internal circulation channel 30 is turned on, the external exhaust channel 40 is blocked, and the auxiliary fan 306 is turned on;

[0113] Specifically, if the first particle concentration C k1 Less than or equal to the first preset concentration value C kb , it means that the smoke concentration is small at this time, and internal circulation can be carried out, so it switches to the internal circulation mode. Figure 1 and Figure 2 The internal circulation valve 206 and the auxiliary fan 306 are opened, and the external exhaust valve 207 is closed.

[0114] In this way, combined with Figures 1 to 3 When cooking, the first detector 203 arranged in the smoke inlet channel is used to detect the concentration of oil smoke particles entering the smoke inlet channel (i.e., the first particle concentration). According to the comparison result of the first particle concentration and the first preset value, the internal circulation mode or the external circulation mode is selected to facilitate the switching between the internal circulation mode and the external exhaust mode. Since an auxiliary air inlet channel 307 is additionally arranged to be connected to the internal circulation channel 30, and the outlet of the auxiliary air inlet channel 307 is located on the upstream side of the internal circulation filter 302, in the internal circulation mode, the auxiliary fan 306 in the auxiliary air inlet channel 307 can input the indoor gas 503 into the internal circulation channel 30 to mix with the airflow in the internal circulation channel 30 and then pass through the internal circulation filter 302 to filter the particles and then be discharged into the room. In this way, the odor concentration of the gas discharged into the room in the internal circulation mode is reduced by air mixing, the odor is reduced, and the user experience is improved.

[0115] Optionally, in step S1, a second particle concentration in the external discharge channel 40 is also obtained;

[0116] That is, the second particle concentration C transmitted from the second detector 401 is also obtained. k2 .

[0117] After step S3, the method further comprises the following steps S5-S6:

[0118] Step S5, determining whether the second particle concentration is greater than a second preset concentration value;

[0119] That is, the second particle concentration C k2 and the second preset concentration value C ka The comparison is performed, and the following step S6 or step S7 is selected according to the comparison result, that is, when the judgment is yes (the second particle concentration C k2 Greater than the second preset concentration value C ka ) and execute step S6, and judge as no (the second particulate matter concentration C k2 Less than or equal to the second preset concentration value C ka ) execute step S7.

[0120] Step S6: If yes, increase the speed of the fan 106 in the smoke inlet channel;

[0121] If the second particle concentration C k2 Greater than the second preset concentration value C ka , it indicates that the smoke generated by the cookware 03 during cooking is large. At this time, the smoke needs to be discharged from the cooking room as soon as possible. Therefore, the speed of the fan 106 in the smoke inlet channel is increased. Specifically, the fan 106 can be automatically or manually adjusted to the maximum gear by the user. In this way, the speed of the fan 106 is increased to discharge the smoke as soon as possible and reduce the indoor smoke concentration.

[0122] Step S7: If not, maintain the fan 106 at the current speed.

[0123] If the second particle concentration C k2 Less than or equal to the second preset concentration value C ka , indicating that the smoke generated by the pot 03 during cooking is relatively small, and at this time, it is only necessary to maintain the fan 106 at the current speed (current gear position).

[0124] Optionally, in step S1, a third particle concentration in the inner circulation channel 30 may also be obtained;

[0125] That is, the third particle concentration C transmitted from the third detector 301 is also obtained. v1 .

[0126] Combination Figure 4 , step S4 includes the following steps S40-S43:

[0127] Step S40, controlling the inner circulation channel 30 to be turned on and the outer discharge channel 40 to be turned off.

[0128] That is, the inner circulation valve 206 is controlled to be opened, and the outer exhaust valve 207 is controlled to be closed;

[0129] Step S41, determining whether the third particle concentration is greater than a third preset concentration value;

[0130] That is, the third particle concentration C v1 and the third preset concentration value C v0 The comparison is performed, and the following step S42 or step S43 is selected according to the comparison result, that is, when the judgment is yes (the third particle concentration C v1 Greater than the third preset concentration value C v0 ) and execute step S42, and judge as No (the third particulate matter concentration C v1 Less than or equal to the third preset concentration value C v0 ) execute step S43.

[0131] Step S42, if yes, control the auxiliary fan 306 to turn on;

[0132] If the third particle concentration C v1 Greater than the third preset concentration value C v0 , the auxiliary fan 306 is turned on. After the auxiliary fan 306 is running, it inhales indoor air and mixes it with the gas located on the upstream side of the internal circulation filter 302 in the internal circulation channel 30, and then passes through the internal circulation filter 302 to further adsorb the odor, and then discharges it into the room. In this way, the odor concentration of the gas discharged by the range hood in the internal circulation mode is reduced by gas mixing.

[0133] Step S43: if not, control the auxiliary fan 306 to be turned off.

[0134] If the third particle concentration C v1 Less than or equal to the third preset concentration value C v0 , indicating that the gas concentration on the upstream side of the internal circulation filter 302 is appropriate, and the auxiliary fan 306 does not need to be operated at this time, so the auxiliary fan 306 can be turned off.

[0135] In order to more accurately control the auxiliary fan 306, in step S1, the first flow value in the smoke inlet channel, the fourth particle concentration in the auxiliary air inlet channel 307 and the second flow value are also obtained;

[0136] That is, the first flow value Q1 transmitted from the first detector 203 , the fourth particle concentration and the second flow value Q2 transmitted from the fourth detector 305 are also acquired.

[0137] After step S42, the method further includes:

[0138] Step S44 , controlling the operating state of the auxiliary fan 306 according to the first flow value Q1 , the second flow value Q2 , the third particle concentration and the fourth particle concentration.

[0139] More detailed, combined Figure 5 In the inner circulation mode, step S44 includes the following steps S440-S442:

[0140] Step S440, determining whether the mixed concentration is greater than a preset mixed concentration;

[0141] That is, the mixed concentration is compared with the preset mixed concentration, and the following step S441 or step S442 is selected to be executed according to the comparison result. That is, if the judgment is yes (the mixed concentration is greater than the preset mixed concentration), step S441 is executed, and if the judgment is no (the mixed concentration is less than or equal to the preset mixed concentration), step S442 is executed.

[0142] Step S441, if yes, increase the speed of the auxiliary fan 306, and turn it off after the fan 106 in the smoke inlet channel is turned off for a preset time;

[0143] If the mixed concentration is greater than the preset mixed concentration, it means that the gas concentration on the upstream side of the internal circulation filter element 302 is relatively large. Therefore, it is necessary to increase the rotation speed of the auxiliary fan 306. Specifically, the gear of the auxiliary fan 306 can be adjusted to the maximum gear. In this way, the rotation speed of the auxiliary fan 306 will be adjusted to the maximum value, and the fan 106 in the smoke inlet channel will be turned off and then turned off after a preset time. For example, the preset time is three minutes. In this way, the delayed shutdown of the auxiliary fan 306 can discharge the residual smoke in the smoke inlet channel into the room.

[0144] Step S442, if not, maintain the auxiliary fan 306 at the current speed;

[0145] If the mixed concentration is less than or equal to the preset mixed concentration, it means that the gas concentration on the upstream side of the internal circulation filter 302 is relatively small and suitable, so it is only necessary to maintain the auxiliary fan 306 at the current speed (current gear).

[0146] Among them, the mixed concentration C can be obtained according to formula (1): v .

[0147] It should be noted that in several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and a module, a program segment or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0148] Finally, it should be noted that in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0149] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A range hood, characterized in that: It comprises a smoke inlet channel, an external exhaust channel (40), an internal circulation channel (30) and an auxiliary air inlet channel (307); A first detector (203) is arranged in the smoke inlet channel, and the first detector (203) is used to detect a first particle concentration in the smoke inlet channel; The inlets of the external exhaust channel (40) and the internal circulation channel (30) are connected to the outlet of the smoke inlet channel; an internal circulation filter element (302) is provided in the internal circulation channel (30); The inlet of the auxiliary air inlet channel (307) is used to communicate with the interior of the room, the outlet of the auxiliary air inlet channel (307) is communicated with the internal circulation channel (30), and the outlet of the auxiliary air inlet channel (307) is located on the upstream side of the internal circulation filter element (302), and the auxiliary air inlet channel (307) is connected to an auxiliary fan (306); When the first particle concentration is greater than a first preset concentration value, the external exhaust channel (40) is opened, the internal circulation channel (30) is blocked, the auxiliary fan (306) is turned off, and the range hood enters an external exhaust mode; When the first particle concentration is less than or equal to the first preset concentration value, the internal circulation channel (30) is turned on, the external exhaust channel (40) is blocked, the auxiliary fan (306) is turned on, and the range hood enters the internal circulation mode.

2. The range hood according to claim 1, characterized in that: A second detector (401) is also provided in the external exhaust channel (40), and the second detector (401) is used to detect a second particle concentration in the external exhaust channel (40); in the external exhaust mode, when the second particle concentration is greater than a second preset concentration value, the rotation speed of the fan (106) in the smoke inlet channel is increased; when the second particle concentration is less than or equal to the second preset concentration value, the fan (106) is maintained at a current rotation speed; and / or, The inlet of the external discharge channel (40) is provided with an external discharge valve (207), and the inlet of the internal circulation channel (30) is provided with an internal circulation valve (206); when the first particle concentration is greater than a first preset concentration value, the external discharge valve (207) is opened, and the internal circulation valve (206) is closed; when the first particle concentration is less than or equal to the first preset concentration value, the internal circulation valve (206) is opened, and the external discharge valve (207) is closed; and / or, The auxiliary fan (306) is located within the auxiliary air inlet channel (307); and / or, The outlet of the internal circulation channel (30) is located at the lower side of the inlet of the auxiliary air inlet channel (307), and an internal circulation outlet grille (303) is provided at the outlet of the internal circulation channel (30), and the air outlet direction of the internal circulation outlet grille (303) is inclined downward; and / or, The inner circulation channel (30) and the outer discharge channel (40) are arranged in parallel, and the inner circulation channel (30) is located above the outer discharge channel (40).

3. The range hood according to claim 1, characterized in that: A third detector (301) is arranged in the inner circulation channel (30), and the third detector (301) is used to detect a third particle concentration in the inner circulation channel (30); When the first particle concentration is less than or equal to a first preset concentration value, when the third particle concentration is greater than a third preset concentration value, the auxiliary fan (306) is turned on, and when the third particle concentration is less than or equal to the third preset concentration value, the auxiliary fan (306) is turned off.

4. The range hood according to claim 3, characterized in that: The first detector (203) is also used to detect a first flow value in the smoke inlet channel; A fourth detector (305) is provided in the auxiliary air inlet channel (307), and the fourth detector (305) is used to detect a fourth particle concentration and a second flow value in the auxiliary air inlet channel (307); When the auxiliary fan (306) is turned on, the operating state of the auxiliary fan (306) is controlled according to the first flow value, the second flow value, the third particle concentration, and the fourth particle concentration.

5. The range hood according to claim 4, characterized in that: In the internal circulation mode, when the auxiliary fan (306) is turned on, the mixed concentration C is obtained according to the following formula: v : Among them, C v1 represents the third particle concentration, Q1 represents the first flow value, C v2 characterizes the fourth particle concentration, and Q2 characterizes the second flow value; When the mixed concentration is greater than a preset mixed concentration, the rotation speed of the auxiliary fan (306) is increased, and the fan (106) in the smoke inlet channel is turned off after a preset time; When the mixed concentration is less than or equal to the preset mixed concentration, the auxiliary fan (306) is maintained at a current rotation speed.

6. A range hood control method, characterized in that: The range hood comprises a smoke inlet channel, an external exhaust channel (40), an internal circulation channel (30) and an auxiliary air inlet channel (307); the inlets of the external exhaust channel (40) and the internal circulation channel (30) are in communication with the outlet of the smoke inlet channel, and the internal circulation channel (30) has an internal circulation filter (302); the inlet of the auxiliary air inlet channel (307) is used to communicate with the interior of the room, the outlet of the auxiliary air inlet channel (307) is in communication with the internal circulation channel (30), and the outlet of the auxiliary air inlet channel (307) is located on the upstream side of the internal circulation filter (302), and the auxiliary air inlet channel (307) is connected to an auxiliary fan (306); The method comprises: S1, obtaining a first particle concentration in the smoke inlet channel; S2, determining whether the first particle concentration is greater than a first preset concentration value; S3, if yes, control the external exhaust passage (40) to be open, the internal circulation passage (30) to be blocked, and the auxiliary fan (306) to be turned off; S4, if not, control the internal circulation channel (30) to be turned on, the external exhaust channel (40) to be blocked, and the auxiliary fan (306) to be turned on.

7. The range hood control method according to claim 6, characterized in that: In step S1, a second particle concentration in the external discharge channel (40) is also obtained; After step S3, the method further comprises: S5, determining whether the second particulate matter concentration is greater than a second preset concentration value; S6, if yes, increase the speed of the fan (106) in the smoke inlet channel; S7, if not, maintaining the fan (106) at the current rotation speed.

8. The range hood control method according to claim 6, characterized in that: In step S1, a third particle concentration in the inner circulation channel (30) is also obtained; Step S4 includes: S40, controlling the internal circulation channel (30) to be turned on and the external discharge channel (40) to be blocked; S41, determining whether the third particle concentration is greater than a third preset concentration value; S42, if yes, control the auxiliary fan (306) to turn on; S43, if not, control the auxiliary fan (306) to be turned off.

9. The range hood control method according to claim 8, characterized in that: In step S1, a first flow value in the smoke inlet channel, a fourth particle concentration in the auxiliary air inlet channel (307), and a second flow value are also obtained; After step S42, the method further includes: S44, controlling the operating state of the auxiliary fan (306) according to the first flow value, the second flow value, the third particle concentration and the fourth particle concentration.

10. The range hood control method according to claim 9, characterized in that: Step S44 includes: S440, determining whether the mixed concentration is greater than a preset mixed concentration; S441, if yes, increase the rotation speed of the auxiliary fan (306), and shut down the fan (106) in the smoke inlet channel after a preset time; S442, if not, maintaining the auxiliary fan (306) at the current rotation speed; Wherein, the mixed concentration C is obtained according to the following formula: v : C v1 represents the third particle concentration, Q1 represents the first flow value, C v2 represents the fourth particle concentration, and Q2 represents the second flow value.

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