A control method for a range hood and a range hood applied thereto

Abstract

The present invention discloses a control method for a range hood and a range hood applied with the control method, wherein the control method for the range hood is a control method for a cleaning device of the range hood, wherein the range hood comprises an air inlet component, a fan system and a cleaning device for cleaning the fan system, wherein the cleaning device can spray cleaning liquid to the fan system, and is characterized in that: the control method is a pre-coating procedure for the cleaning liquid, comprising the following steps: 1) performing a pre-coating self-check procedure to ensure that the air inlet component is closed, the cleaning liquid is sufficiently sprayed, and the sprayed parts are located in the fan system; 2) starting a pre-coating protection procedure, comprising the following steps: 2.1) the fan system operates at the lowest gear; 2.2) ensuring that the rotation speed of the fan system is within a preset range of [n1, n2], wherein n1 is a preset lower limit of the rotation speed, and n2 is a preset upper limit of the rotation speed, and then proceeding to step 2.3); 2.3) spraying cleaning liquid to the fan system; 3) completing the pre-coating procedure.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a control method of an oil fume extractor and an oil fume extractor applied to the control method. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Usually, range hoods include top suction type and side suction type. Top suction range hoods are more and more widely used due to their advantages such as neatness, lightness and small space occupation. Top suction range hoods usually include a fume hood and a fan frame located on the fume hood. The fan frame is equipped with a volute, an impeller and a motor driving the impeller. The center of the fume hood is provided with an air inlet directly connected to the high negative pressure area where the fan is located.

[0003] Due to the particularity of the kitchen environment, as the range hood is used for a long time, a large amount of oil will accumulate inside the power system (usually the fan system), which is mainly distributed on the pressure surface of the impeller blades and the surface of the volute. The accumulation of oil will reduce the performance of the range hood and affect the oil fume extraction effect. At the same time, the long-term accumulation of oil will produce odor and breed bacteria, which will affect the customer's experience and health.

[0004] At present, the cleaning of the fan system is mainly: a nozzle is set near the fan impeller (inside or outside the impeller) to spray water or steam or other cleaning liquids on the blades: for example, a steam self-cleaning range hood disclosed in Chinese patent application No. 201820956668.7 comprises: a range hood body, an impeller arranged in the range hood body, the steam self-cleaning range hood also comprises a steam cleaning module, the steam cleaning module comprises a heating pipe, the water inlet end of the heating pipe is connected to a water pump, the water outlet end of the heating pipe is connected to a nozzle through a water outlet pipe, and the nozzle is aimed at the impeller.

[0005] This traditional range hood with self-cleaning technology uses an electric water pump as a power source to increase water pressure, and its cleaning effect is limited. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a control method for a range hood in view of the deficiencies in the above-mentioned prior art, so as to improve the oil filtering capacity of the range hood and facilitate cleaning.

[0007] The second technical problem to be solved by the present invention is to provide a range hood applied to the above control method.

[0008] The first technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a control method for a cleaning device of a range hood, the range hood comprising an air inlet assembly, a fan system and a cleaning device for cleaning the fan system, the cleaning device being capable of spraying a cleaning liquid to the fan system, characterized in that: the control method is a pre-coating procedure of the cleaning liquid, comprising the following steps:

[0009] 1) Perform the pre-coating self-test procedure to ensure that the air inlet assembly is closed, the cleaning liquid is sprayed sufficiently, and the sprayed parts are located in the fan system;

[0010] 2) Start the pre-coating protection program, including the following steps:

[0011] 2.1) The fan system operates at the lowest gear;

[0012] 2.2) Ensure that the speed of the fan system is within the preset range of [n1, n2], where n1 is the preset lower speed limit and n2 is the preset upper speed limit, and then proceed to step 2.3);

[0013] 2.3) Spray cleaning liquid to the fan system;

[0014] 3) The pre-coating procedure is completed.

[0015] By pre-coating the fan system in advance, on the one hand, the cleaning fluid or the foam generated by the cleaning fluid can be used to improve the fan system's ability to absorb oil on the surface, thereby improving the oil filtering capacity; on the other hand, the combination of pre-protective layer and cleaning can also reduce the adhesion of oil stains on the fan system surface, making it easier to clean.

[0016] The second technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a method for controlling a cleaning device of a range hood, characterized in that: the range hood is configured with a common time period for users to cook, and the control method comprises the following steps:

[0017] 1) Power on the machine;

[0018] 2) If no user command is detected, enter standby mode;

[0019] 3) Determine whether the pre-coating procedure of the washing liquid has been completed and cooking has not been performed; if yes, return to step 2); if no, proceed to step 4);

[0020] 4) Determine whether it is a certain time before the usual cooking time period, if yes, go to step 5), if not, go back to step 2);

[0021] 5) Enter the pre-coating procedure, adopt the pre-coating procedure as described above, and after completion, return to step 2).

[0022] By pre-coating the fan system in advance on a daily basis, on the one hand, the cleaning fluid or the foam generated by the cleaning fluid can be used to improve the fan system's ability to absorb oil on the surface, thereby improving the oil filtering capacity; on the other hand, the combination of pre-protective layer and cleaning can also reduce the adhesion of oil stains on the fan system surface, making it easier to clean.

[0023] Preferably, in order to facilitate configuration of a user's common cooking time period so as to plan the time for coating in advance, configuring the user's common cooking time period includes the following steps:

[0024] After the user binds the range hood through the APP of the remote control terminal, the user is prompted to enter the cooking habit setting link and is guided to select or add commonly used time periods for cooking.

[0025] The third technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a self-cleaning control method using the cleaning device control method as claimed in claim 1, wherein the cleaning device can also spray clean water, characterized in that: the self-cleaning control method comprises the following steps:

[0026] 1) Power on the machine;

[0027] 2) Detecting the receipt of the user instruction, determining whether the pre-coating procedure has been completed, if yes, proceeding to step 3), if not, proceeding to the pre-coating procedure, using the pre-coating procedure as described above, and proceeding to step 3) after completion;

[0028] 3) Run the gear required by the user for a certain period of time;

[0029] 4) Determine whether to execute the shutdown command, if yes, go to step 5), if no, go back to step 2);

[0030] 5) Prompt to perform self-cleaning after use;

[0031] 6) Determine whether the cumulative usage time since the last major cleaning is greater than the preset cumulative time. If so, execute the major cleaning procedure and clean the fan system with detergent and clean water through the cleaning device; if not, perform quick cleaning to complete the fan system by forward and reverse rotation.

[0032] On the one hand, pre-coating of cleaning liquid or the foam generated by the cleaning liquid can pre-occupy the gaps between the main parts of the oil-gas separation machine such as the fan system to reduce the adhesion and accumulation of oil stains, making it easier to clean during the major cleaning. On the other hand, daily pre-coating in advance and daily quick cleaning can more quickly and effectively remove the oil stains accumulated on the pre-coating layer during a single use, making quick cleaning cleaner and thus extending the major cleaning cycle.

[0033] Preferably, in order to facilitate better cleaning of the fan system, the general cleaning includes the following steps:

[0034] 7.1) Start the cleaning procedure;

[0035] 7.2) Control the speed of the fan system within the range of [n1, n2] and the cleaning device in the mode of spraying cleaning liquid;

[0036] 7.3) The cleaning liquid infiltrates the fan system for a certain period of time;

[0037] 7.4) Control the speed of the fan system within the range of [n1, n2] and the cleaning device in the mode of water flushing;

[0038] 7.5) After the flushing is completed, the turbidity of the flushing water is tested, and it is determined whether it is clean based on the test results. If yes, the major cleaning is completed and returns to the main program. If not, return to step 7.2).

[0039] In order to better match the user's cooking time period plan, the pre-coating is completed before the planned cooking time period. The range hood is configured with the user's common cooking time period. After step 7), the following steps are also included:

[0040] 8) Perform the spin-drying operation, complete the cleaning work, and reset the cleaning cycle;

[0041] 9) Determine whether the common cooking time period needs to be checked in advance, starting from i=0, i is the time period divided equally into each day, if yes, proceed to step 10);

[0042] 10) Obtain the number of times Si that users in time period i start up before the preset time;

[0043] 11) Determine whether Si>Sa is established, where Sa is the preset number of early starts. If yes, proceed to step 12); if no, proceed to step 13);

[0044] 12) The most recent common cooking time period after time period i is advanced to time period i, and Si=0 is executed to clear it;

[0045] 13) Determine whether the time period check is completed, if yes, shut down, if not, then i=i+1, return to step 10).

[0046] Preferably, in order to complete the cleaning more quickly, the quick cleaning comprises the following steps:

[0047] 14.1) Control the fan system to rotate forward at P1 for a period of time and stop for a certain period of time;

[0048] 14.2) Control the fan system to reverse for a period of time at P2 and stop for a certain period of time; P1 and P2 are different gears;

[0049] 14.3) Make the number of rapid cleaning cycles u=u+1, and determine whether u≥u1 is established, u1 is the preset upper limit of the number of rapid cleaning cycles, if yes, go to step 10), if not, go back to step 14.1).

[0050] In order to better cooperate with the user's cooking time period plan, pre-coating is completed before the planned cooking time period. In step 2), before running the pre-coating program, first record the common cooking time period i started in advance by the user, and the i time period counter Si=Si+1; then run the pre-coating program, and enter step 3) after completion.

[0051] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a range hood applied to the control method as described above, the range hood comprising an air inlet assembly, a fan system and a cleaning device for cleaning the fan system, the cleaning device comprising a first box for storing clean water, a second box for storing washing liquid and a spray arm located in the fan system, the spray arm being selectively connected to the first box and the second box.

[0052] In order to fully cover the inner surface of the fan system during spraying, the fan system includes a volute and an impeller arranged in the volute;

[0053] The cleaning device also includes an elastic conduit connected to the spray arm, and a water pump that pumps clean water in the first box or washing liquid in the second box into the elastic conduit. The elastic conduit can be extended and retracted in the axial direction of the impeller, and the spray direction of the spray arm is inclined relative to the axis of the impeller.

[0054] In order to facilitate the selective supply of clean water and washing liquid to the spray arm, the cleaning device further includes a first valve body, a second valve body, a first conduit, a second conduit and a third conduit;

[0055] The first conduit is connected to the bottom of the first box and is in fluid communication with the first box, and the second conduit is connected to the bottom of the second box and is in fluid communication with the second box;

[0056] The end of the first conduit away from the first box, the end of the second conduit away from the second box and one end of the third conduit are connected together, and a three-way valve is provided at the connection so that the third conduit is selectively in fluid communication with the first conduit or the second conduit;

[0057] The first valve body is arranged on the first conduit, the second valve body is arranged on the second conduit, the water pump is arranged on the third conduit, and the third conduit is connected to the elastic conduit.

[0058] In order to monitor the liquid level and remind the user to add liquid in time, a first liquid level sensor is arranged in the first box body, and a second liquid level sensor is arranged in the second box body.

[0059] Compared with the prior art, the advantages of the present invention are:

[0060] 1. By pre-coating the fan system in advance, on the one hand, this type of cleaning liquid or foam can be used to improve the fan system's ability to absorb oil on the surface, thereby improving the oil filtering capacity; on the other hand, the combination of pre-protection layer and cleaning can also reduce the adhesion of oil on the fan system surface, making it easier to clean;

[0061] 2. After the range hood has been running for a period of time, it can automatically and intelligently perform a major cleaning. By pre-coating detergent or foam, on the one hand, the gaps between the main oil and gas separation components such as the fan system can be "occupied" in advance to reduce the accumulation of oil and dirt, making it easier to clean during the major cleaning. On the other hand, daily pre-coating in advance and daily quick cleaning can more quickly and effectively remove the oil and dirt accumulated on the pre-coating layer during a single use, making quick cleaning cleaner and thus extending the cycle of major cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 is a schematic diagram of a range hood according to an embodiment of the present invention;

[0063] Figure 2 is a cross-sectional view of a range hood according to an embodiment of the present invention;

[0064] Figure 3 is a schematic diagram of a cleaning device for a range hood according to an embodiment of the present invention;

[0065] Figure 4 is a cross-sectional view of a cleaning device for a range hood according to an embodiment of the present invention;

[0066] Figure 5 A flow chart of configuration of a range hood according to an embodiment of the present invention before installation or initial use;

[0067] Figure 6 A flow chart of daily pre-spraying of a range hood according to an embodiment of the present invention;

[0068] Figure 7 A flow chart of the self-cleaning of a range hood during daily use according to an embodiment of the present invention;

[0069] Figure 8 The figure is a flowchart of cleaning a range hood according to an embodiment of the present invention. DETAILED DESCRIPTION

[0070] The present invention is further described in detail below with reference to the accompanying drawings.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0072] See also Figure 1 to Figure 4 A range hood includes a fan frame 1, a fan system 2 arranged in the fan frame 1, and an air inlet assembly 3 arranged under the fan frame 1 ( Figure 1 The air inlet assembly 3 is shown in the closed state, and needs to be opened for normal fume suction operation). The fan system 2 is a centrifugal fan, including a volute 21 and an impeller 22 disposed in the volute 21 .

[0073] The range hood further includes a cleaning device, which includes a first box 411, a second box 412, a first valve body 421, a second valve body 422, a first conduit 431, a second conduit 432, a third conduit 433, a water pump 44, an elastic conduit 45, and a spray arm 46. The first box 411 is used to store water, the second box 412 is used to store detergent, a first liquid outlet 4111 is provided at the bottom of the first box 411, and a second liquid outlet 4121 is provided at the bottom of the second box 412. The first conduit 431 is connected to the bottom of the first box 411 and is in fluid communication with the first box 411 through the first liquid outlet 4111, and the second conduit 432 is connected to the bottom of the second box 412 and is in fluid communication with the second box 412 through the second liquid outlet 4121. The end of the first conduit 431 away from the first box body 411, the end of the second conduit 432 away from the second box body 412, and one end of the third conduit 433 are connected together, and a three-way valve 47 is provided at the connection point, so that the third conduit 433 is selectively connected to the first conduit 431 or the second conduit 432 fluid.

[0074] The first valve body 421 is arranged on the first conduit 431, thereby controlling the conduction of the first conduit 431. The second valve body 422 is arranged on the second conduit 432, thereby controlling the conduction of the second conduit 432. When water spraying is required, the first valve body 421 is opened, the second valve body 422 is closed, and the three-way valve 47 makes the first conduit 431 and the third conduit 433 communicate with each other; when washing liquid is required, the second valve body 422 is opened, the first valve body 421 is closed, and the three-way valve 47 makes the second conduit 432 and the third conduit 433 communicate with each other.

[0075] The water pump 44 is disposed on the third conduit 433 and is used to pump water in the first tank 411 or washing liquid in the second tank 412 .

[0076] The third conduit 433 is connected to the elastic conduit 45, and the outlet of the elastic conduit 45 is connected to the above-mentioned spray arm 46. The spray arm 46 is the same as the existing rotating spray arm, that is, when the cleaning medium (water or detergent) flows from the elastic conduit 45 into the spray arm 46, the spray arm 46 can rotate under the reaction force of the fluid. In this embodiment, the rotation axis is the axis of the impeller 22, and the elastic conduit 45 is retracted in the axial direction of the impeller 22. Therefore, when the cleaning device is turned on, the spray arm 46 sprays the cleaning medium, and the spraying direction is inclined relative to the axis of the impeller 22, so that the elastic conduit 46 is retracted along the axial direction of the impeller 22, and the liquid can be fully covered on the inner surface of the impeller 22 and the volute 21.

[0077] A first liquid level sensor 481 is disposed in the first box body 411 , and a second liquid level sensor 482 is disposed in the second box body 412 .

[0078] See also Figure 5 , shows the configuration process of the range hood of the present invention before installation or initial use, through which the range hood is bound to the APP, and the time period frequently used for daily cooking is set in a cycle of one week or one day, specifically, the following steps are included:

[0079] 1) The user selects to add a range hood device in the remote control terminal APP, sends a request to add a binding, and turns on the code scanning mode. The remote control device can be a mobile phone, PDA, tablet computer or other portable device;

[0080] 2) Switch the range hood and other devices to the networking preparation mode, such as AP mode;

[0081] 3) The remote control terminal establishes a connection with the range hood and transmits the LAN password, account information, etc.;

[0082] 4) Prompt the user to click on the light on (or the corresponding gear of the fan system 2) in the APP to confirm whether the user currently needs to bind the range hood to turn on the light (or the corresponding gear of the fan system 2);

[0083] 5) The user confirms that the corresponding light is turned on (or the corresponding gear of fan system 2), and the user is prompted that the binding is successful;

[0084] 6) Prompting the user to enter the cooking habit setting phase, and guiding the user to select or add the expected common time periods for cooking on a weekly or daily basis;

[0085] 7) Prompt the user to complete the device before use.

[0086] In the above process, the connection and configuration methods of the APP and the device are the same as the common methods of the existing Internet of Things. After that, the range hood can be operated through the APP, and of course the control panel of the range hood can still be operated.

[0087] Before the user prepares to cook, the impeller 22, volute 21 and other main oil and gas separation components are pre-sprayed with a disposable pre-protective layer such as a cleaning liquid or foam (generated by the cleaning liquid). On the one hand, such cleaning liquid or foam can be used to improve the ability of the impeller and volute surface to absorb oil, thereby improving the oil filtering ability; on the other hand, the combination of the pre-protective layer and cleaning can also reduce the adhesion of oil on the surface of the impeller 22 and volute 21, making it easier to clean. For details, see Figure 6 , including the following steps:

[0088] 1) Power on the machine;

[0089] 2) If no user command is detected, enter standby mode;

[0090] 3) Determine whether pre-coating has been completed and cooking has not been performed; if yes, return to step 2), if no, proceed to step 4;

[0091] 4) Determine whether it is a certain time before the expected cooking time (a certain time before the usual cooking time period), such as t1, if yes, go to step 5), if not, go back to step 2);

[0092] 5) Enter the pre-coating process:

[0093] 5.1) First, the pre-coating self-check procedure is performed, and the self-check items include: confirming that the air inlet component is closed; the spray arm 46 moves to the initial pre-spray position, and the first valve body 421 is confirmed to be closed. Finally, the liquid level of the washing liquid is confirmed to determine whether the liquid level is higher than the preset spray limit liquid level. If yes, proceed to step 6.2). If not, it prompts to add washing liquid, wait for a certain time, such as after t5, and return to step 2);

[0094] 5.2) Start the pre-coating protection program, including the following steps:

[0095] 5.2.1) The motor (not shown) of the fan system 2 drives the impeller 22 to operate at the lowest gear I1;

[0096] 5.2.2) Determine whether the speed of the fan system 2 is within the preset range of [n1, n2]. If yes, proceed to step 5.2.3). If not, adjust the current of the motor of the fan system 2 and repeat this step; [n1, n2] enables the fan system 2 to run at a speed lower than that during normal operation, so as to fully coat; n1 is the preset lower speed limit, and n2 is the preset upper speed limit;

[0097] 5.2.3) The water pump 44 is turned on and the second valve body 422 is opened;

[0098] 5.2.4) The spray arm 46 moves to cover the inner surface of the impeller 22 and the volute 21;

[0099] 5.3) The pre-coating process is completed, return to step 2).

[0100] See also Figure 7 , is a control flow chart for daily self-cleaning. Specifically, the control method includes the following steps:

[0101] 1) Power on the machine;

[0102] 2) Detecting the receipt of the user instruction and determining whether the pre-coating procedure has been completed, if yes, proceeding to step 3), if no, proceeding to step 15);

[0103] 3) Run the gear required by the user for a certain period of time;

[0104] 4) Determine whether to execute the shutdown command, if yes, go to step 5), if no, go back to step 2);

[0105] 5) Prompt to perform self-cleaning after use;

[0106] 6) Determine whether the cumulative usage time since the last major cleaning is greater than the preset cumulative time t4, if yes, proceed to step 7), if no, proceed to step 14);

[0107] 7) Perform a major cleanup, see Figure 8 , including the following steps:

[0108] 7.1) Start the cleaning procedure;

[0109] 7.2) Control the fan system 2 to rotate at a low speed (within the range of [n1, n2]) and the cleaning device to spray the cleaning liquid;

[0110] 7.3) Thereafter, the washing liquid infiltrates the fan system 2 for a certain period of time, such as the time being a preset tq1;

[0111] 7.4) Control the fan system 2 to run at a low speed (within the range of [n1, n2]) and the cleaning device to be in the clean water flushing mode;

[0112] 7.5) After the flushing is completed, the turbidity of the flushing water is tested, and it is judged whether it is cleaned according to the test result. For example, the test result is compared with the preset clean turbidity D1. If the turbidity is less than D1, it is cleaned; if so, the major cleaning is completed, return to the main program and enter step 8), if not, return to step 7.2).

[0113] 8) Execute the spin-drying operation (start the fan system 2), complete the cleaning work, and reset the cleaning cycle;

[0114] 9) Determine whether the cooking time period needs to be checked in advance, starting from i=0, if yes, proceed to step 10);

[0115] 10) Obtain the number of times Si that users in time period i start up before the preset time, where i is a segment such as an hour or half an hour per day;

[0116] 11) Determine whether Si>Sa is established, where Sa is the preset number of early starts. If yes, proceed to step 12); if no, proceed to step 13);

[0117] 12) The most recent common cooking time period after time period i is advanced to time period i, and Si=0 is executed to clear it;

[0118] 13) Determine whether the time period check is completed, if yes, shut down, if not, then i=i+1, return to step 10);

[0119] 14) Prompt to perform quick cleaning, specifically, including the following steps:

[0120] 14.1) Control the impeller 22 of the fan system 2 to rotate forward for a period of time at gear P1, such as t2, and stop for a certain period of time, such as t3;

[0121] 14.2) Controlling the impeller 22 of the fan system 2 to reverse for a period of time at P2, such as t4, and stop for a certain period of time, such as t3; P1 and P2 are different gears;

[0122] 14.3) Make the number of rapid cleaning cycles u=u+1, and determine whether u≥u1 is established, where u1 is the preset upper limit of the number of rapid cleaning cycles. If yes, proceed to step 10), if not, return to step 14.1);

[0123] 15) It is prompted that the pre-coating program needs to be run first. First, the common cooking time period i started in advance by the user is recorded, and the i-time period counter Si=Si+1; then the pre-coating program is run as described above; after completion, go to step 3).

[0124] The time values, preset values, etc. in each step of the above methods can all be obtained in advance through experiments.

[0125] The cleaning device used in the above-mentioned pre-coating procedure, cleaning control and other methods can also adopt the cleaning device that can spray detergent in the prior art. By pre-coating the impeller 22 and the volute 21 in advance, on the one hand, such detergent or foam can be used to improve the ability of the impeller 22 and the volute 21 to absorb oil, thereby improving the oil filtering ability; on the other hand, the combination of pre-protection layer and cleaning can also reduce the adhesion of oil on the surface of the impeller 22 and the volute 21, making it easier to clean, and after the range hood has been running for a period of time, it can intelligently and automatically perform a large cleaning. The large cleaning method can also adopt the existing ordinary self-cleaning. By pre-coating detergent or foam, on the one hand, the gaps between the main parts of the oil and gas separation machine such as the impeller 22 and the volute 21 can be pre-"occupied" to reduce the adhesion and accumulation of oil, so that it can be easier to clean when performing the large cleaning. On the other hand, daily pre-coating in advance and daily quick cleaning can be combined to more quickly and effectively remove the oil accumulated on the pre-coating layer in a single use (combined with daily quick cleaning), and quick cleaning is cleaner, thereby extending the cycle of large cleaning.

[0126] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A method for controlling a cleaning device of a range hood, the range hood comprising an air inlet assembly (1), a fan system (2) and a cleaning device for cleaning the fan system (2), the cleaning device being capable of spraying a cleaning liquid onto the fan system (2), characterized in that: The range hood is configured with a common time period for users to cook, and the control method comprises the following steps: 1) Power on the machine; 2) If no user command is detected, enter standby mode; 3) determining whether the pre-coating procedure of the detergent has been completed and cooking has not been performed; If yes, go back to step 2); if no, go to step 4); 4) Determine whether it is a certain time before the usual cooking time period, if yes, go to step 5), if not, go back to step 2); 5) Enter the pre-coating process. After completion, return to step 2): 5.1) Perform the pre-coating self-check procedure to ensure that the air inlet assembly (1) is closed, the cleaning liquid is sprayed sufficiently, and the sprayed parts are located in the fan system (2); 5.2) Start the pre-coating protection program, including the following steps: 5.2.1) The fan system (2) operates at the lowest gear; 5.2.2) Ensure that the speed of the fan system (2) is within the preset range [n1, n2], where n1 is the preset lower speed limit and n2 is the preset upper speed limit, and then proceed to step 5.2.3); 5.2.3) Spray cleaning liquid onto the fan system (2); 5.3) The pre-coating procedure is completed.

2. The control method of the cleaning device of the range hood according to claim 1, characterized in that: Configuring the user's common cooking time period includes the following steps: After the user binds the range hood through the APP of the remote control terminal, the user is prompted to enter the cooking habit setting link and is guided to select or add commonly used time periods for cooking.

3. A self-cleaning control method for a range hood cleaning device control method, wherein the cleaning device can also spray clean water, characterized in that: The self-cleaning control method comprises the following steps: 1) Power on the machine; 2) Detecting the receipt of the user instruction, determining whether the pre-coating procedure has been completed, if yes, proceeding to step 3), if not, proceeding to the pre-coating procedure, and after completion, proceeding to step 3); the pre-coating procedure includes the following steps: 2.1) Perform the pre-coating self-check procedure to ensure that the air inlet assembly (1) is closed, the cleaning liquid is sprayed sufficiently, and the sprayed parts are located in the fan system (2); 2.2) Start the pre-coating protection program, including the following steps: 2.2.1) The fan system (2) operates at the lowest gear; 2.2.2) Ensure that the speed of the fan system (2) is within the preset range [n1, n2], where n1 is the preset lower speed limit and n2 is the preset upper speed limit, and then proceed to step 2.2.3); 2.2.3) Spray cleaning liquid onto the fan system (2); 2.3) The pre-coating procedure is completed; 3) Run the gear required by the user for a certain period of time; 4) Determine whether to execute the shutdown command, if yes, go to step 5), if no, go back to step 2); 5) Prompt to perform self-cleaning after use; 6) determining whether the accumulated use time since the last major cleaning is greater than a preset accumulated time; if so, executing the major cleaning procedure and entering step 7) to clean the fan system (2) with detergent and clean water by means of a cleaning device; if not, executing a quick cleaning so that the fan system (2) rotates forward and reversely to complete the cleaning; 7) The general cleaning includes the following steps: 7.1) Start the cleaning procedure; 7.2) controlling the speed of the fan system (2) to be within the range of [n1, n2] and the cleaning device to be in a mode of spraying the cleaning liquid; 7.3) The cleaning liquid soaks the fan system (2) for a certain period of time; 7.4) Control the speed of the fan system (2) within the range of [n1, n2] and the cleaning device to be in a clean water flushing mode; 7.5) After the flushing is completed, the turbidity of the flushing water is tested, and it is determined whether it is clean based on the test results. If yes, the major cleaning is completed and returns to the main program. If not, return to step 7.2).

4. The self-cleaning control method of a range hood according to claim 3, characterized in that: The range hood is configured with a common time period for users to cook, and after step 7), the following steps are also included: 8) Perform the spin-drying operation, complete the cleaning work, and reset the cleaning cycle; 9) Determine whether the common cooking time period needs to be checked in advance, starting from i=0, i is the time period divided equally into each day, if yes, go to step 10); 10) Obtain the number of times Si that users in time period i start up before the preset time; 11) Determine whether Si>Sa is established, where Sa is the preset number of early starts. If yes, proceed to step 12); if no, proceed to step 13); 12) The most recent common cooking time period after time period i is advanced to time period i, and Si=0 is executed to clear it; 13) Determine whether the time period check is completed. If yes, shut down the machine. If not, i=i+1 and return to step 10).

5. The self-cleaning control method of a range hood according to claim 3, characterized in that: The rapid cleaning comprises the following steps: 14.1) Control the fan system (2) to rotate forward for a period of time at P1 and then stop for a certain period of time; 14.2) Control the fan system (2) to reverse for a period of time at P2 and stop for a certain period of time; P1 and P2 are different gears; 14.3) Make the number of rapid cleaning cycles u=u+1, and determine whether u≥u1 is established, u1 is the preset upper limit of the number of rapid cleaning cycles, if yes, go to step 10), if not, return to step 14.1).

6. The self-cleaning control method of a range hood according to claim 3, characterized in that: In step 2), before running the pre-coating program, first record the common cooking time period i started in advance by the user, and the i-time period counter Si=Si+1; then run the pre-coating program, and after completion, proceed to step 3).

7. A range hood applied to the control method according to any one of claims 1 to 6, the range hood comprising an air inlet assembly (1), a fan system (2) and a cleaning device for cleaning the fan system (2), the cleaning device comprising a first box (411) for storing clean water, a second box (412) for storing washing liquid and a spray arm (46) located in the fan system (2), the spray arm (46) selectively communicating with the first box (411) and the second box (412); The fan system (2) comprises a volute (21) and an impeller (22) arranged in the volute (21); The cleaning device further comprises an elastic conduit (45) connected to the spray arm (46), and a water pump (44) for pumping clean water in the first box (411) or washing liquid in the second box (412) into the elastic conduit (45); the elastic conduit (45) is retractable in the axial direction of the impeller (22); and the spraying direction of the spray arm (46) is inclined relative to the axis of the impeller (22); The cleaning device further comprises a first valve body (421), a second valve body (422), a first conduit (431), a second conduit (432) and a third conduit (433); The first conduit (431) is connected to the bottom of the first box (411) and is in fluid communication with the first box (411), and the second conduit (432) is connected to the bottom of the second box (412) and is in fluid communication with the second box (412); The end of the first conduit (431) away from the first box (411), the end of the second conduit (432) away from the second box (412), and one end of the third conduit (433) are connected together, and a three-way valve (47) is provided at the connection point, so that the third conduit (433) is selectively fluidically connected to the first conduit (431) or the second conduit (432); The first valve body (421) is arranged on the first conduit (431), the second valve body (422) is arranged on the second conduit (432), the water pump (44) is arranged on the third conduit (433), and the third conduit (433) is connected to the elastic conduit (45).

8. The range hood according to claim 7, characterized in that: A first liquid level sensor (481) is disposed in the first box (411), and a second liquid level sensor (482) is disposed in the second box (412).

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