Fan system of range hood and control method

Abstract

The invention provides a draught fan system of a range hood and a control method, and the draught fan system of the range hood comprises a centrifugal fan and a cross-flow fan; the cross-flow fan is arranged at the bottom of the range hood close to the stove; the centrifugal fan is arranged at the top of the range hood; the cross-flow fan is used for collecting oil fume at the bottom of the range hood; the centrifugal fan is used for collecting lampblack at the top of the range hood. The cross-flow fan is additionally arranged at the bottom of the range hood, namely the side close to the kitchen range, uniform speed of a suction port of the range hood is guaranteed, the overall oil smoke suction effect of the range hood is improved, the size or the rotating speed of the centrifugal fan of the range hood can be reduced through the multi-fan structure, and therefore noise of the range hood is reduced.

Description

Technical Field

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

[0002] The current range hoods on the market are mainly designed to meet the needs of dual stoves. However, with the popularity of small kitchen appliances, the use of portable small appliances such as induction cookers and electric steamers is also increasing. The existing dual stove range hoods cannot collect the steam and fumes generated by these small appliances very well. Figure 1 and Figure 2 As shown. Figure 1 As shown in the figure, the positional relationship between the range hood and the stove is as follows: the stove 102 is located below the front air intake of the range hood 101, and the two stoves 102 almost occupy the entire air intake. Figure 2 As shown in the figure, the working principle of the range hood is as follows: the air flows under the action of the fan, a relatively fast airflow and negative pressure are generated at the air inlet, and the air flows above the stove, such as Figure 2 As shown by the arrow, oil smoke or steam enters the range hood through the air intake port along with the air flow and is discharged under the action of the fan. The size of the air intake port determines the size and range of the air flow above the stove. The farther away from the air intake port, the slower the air flow speed, and the less likely oil smoke and steam are to be inhaled. Summary of the invention

[0003] The technical problem to be solved by the present disclosure is to overcome the defect in the prior art that the oil smoke outside the suction port of the range hood cannot be well collected, and to provide a fan system and a control method for the range hood.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present disclosure provides a fan system for a range hood, the fan system for the range hood comprising: a centrifugal fan, a crossflow fan;

[0006] The cross-flow fan is arranged at the bottom of the range hood near the stove; the centrifugal fan is arranged at the top of the range hood;

[0007] The cross-flow fan is used to collect the oil smoke at the bottom of the range hood; the centrifugal fan is used to collect the oil smoke at the top of the range hood.

[0008] The present disclosure also provides a control method for a range hood, wherein the range hood includes the above-mentioned fan system of the range hood, and the control method for the range hood includes:

[0009] Get the air inlet flow rate and air outlet flow rate at the bottom of the range hood;

[0010] The current rotation speed of the fan system is adjusted or maintained according to the air inlet flow rate and the air outlet flow rate, so as to balance the performance of the crossflow fan and the centrifugal fan in the fan system.

[0011] Preferably, the step of adjusting or maintaining the current rotation speed of the fan system according to the air inlet flow rate and the air outlet flow rate comprises:

[0012] When the air inlet flow rate is greater than a preset air inlet flow rate, reducing the rotation speed of the crossflow fan;

[0013] and / or,

[0014] When the air inlet flow rate is less than a preset air inlet flow rate, increasing the rotation speed of the crossflow fan;

[0015] and / or,

[0016] When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is greater than the preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced and the rotation speed of the crossflow fan is increased;

[0017] and / or,

[0018] When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is less than the preset air outlet flow rate, the rotation speed of the centrifugal fan is increased and the rotation speed of the crossflow fan is reduced;

[0019] and / or,

[0020] When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is equal to the preset air outlet flow rate, the current rotation speeds of the centrifugal fan and the cross-flow fan are maintained.

[0021] The present disclosure also provides a fan system for a range hood, the fan system for the range hood comprising: a centrifugal fan, a first cross-flow fan, and a second cross-flow fan;

[0022] The first crossflow fan and the second crossflow fan are both arranged at the bottom of the range hood near the stove; the first crossflow fan is arranged at a position corresponding to the stove on one side; the second crossflow fan is arranged at a position corresponding to the stove on the other side; the centrifugal fan is arranged at the top of the range hood;

[0023] The first cross-flow fan is used to collect oil smoke from the stove on one side; the second cross-flow fan is used to collect oil smoke from the stove on the other side; and the centrifugal fan is used to collect oil smoke on the top of the range hood.

[0024] The present disclosure also provides a control method for a range hood, wherein the range hood includes a fan system of the range hood as described above, and the control method for the range hood includes:

[0025] determining an operating state of the first cross flow fan and the second cross flow fan;

[0026] When the first cross-flow fan or the second cross-flow fan is in operation, obtaining a flow rate of a first air inlet and a flow rate of a first air outlet at the bottom of the range hood;

[0027] The current rotation speed of the fan system is adjusted or maintained according to the first air inlet flow rate and the first air outlet flow rate to achieve a balanced performance of the fan system during operation.

[0028] Preferably, after the step of determining the operating status of the first cross flow fan and the second cross flow fan, the step further includes:

[0029] When the first cross-flow fan and the second cross-flow fan are both in operation, obtaining a flow rate of a second air inlet and a flow rate of a second air outlet at the bottom of the range hood;

[0030] The current rotation speed of the fan system is adjusted or maintained according to the second air inlet flow rate and the second air outlet flow rate to balance the performance of the fan system during operation.

[0031] Preferably, the step of adjusting or maintaining the current rotation speed of the fan system according to the first air inlet flow rate and the first air outlet flow rate comprises:

[0032] When the first air inlet flow rate is greater than a first preset air inlet flow rate, reducing the speed of the crossflow fan in operation;

[0033] and / or,

[0034] When the flow rate of the first air inlet is less than the first preset air inlet flow rate, increasing the speed of the crossflow fan in operation;

[0035] and / or,

[0036] When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is greater than the first preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced and the rotation speed of the crossflow fan in operation is increased;

[0037] and / or,

[0038] When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is less than the first preset air outlet flow rate, increasing the rotation speed of the centrifugal fan and reducing the rotation speed of the crossflow fan in operation;

[0039] and / or,

[0040] When the first air inlet flow rate is equal to a first preset air inlet flow rate, and the first air outlet flow rate is equal to a first preset air outlet flow rate, the current rotation speeds of the centrifugal fan and the cross-flow fan in operation are maintained.

[0041] Preferably, the step of adjusting or maintaining the current rotation speed of the fan system according to the second air inlet flow rate and the second air outlet flow rate comprises:

[0042] When the second air inlet flow rate is greater than the second preset air inlet flow rate, reducing the rotation speeds of the first cross flow fan and the second cross flow fan;

[0043] and / or,

[0044] When the flow rate of the second air inlet is less than the second preset air inlet flow rate, increasing the rotation speeds of the first cross flow fan and the second cross flow fan;

[0045] and / or,

[0046] When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is greater than the second preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced while the rotation speeds of the first cross-flow fan and the second cross-flow fan are increased;

[0047] and / or,

[0048] When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is less than the second preset air outlet flow rate, increasing the rotation speed of the centrifugal fan and reducing the rotation speeds of the first cross-flow fan and the second cross-flow fan;

[0049] and / or,

[0050] When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is equal to the second preset air outlet flow rate, the current rotation speeds of the centrifugal fan, the first cross-flow fan, and the second cross-flow fan are maintained.

[0051] The present disclosure also provides a computer-readable storage medium having a computer program stored thereon, and the computer program implements the above-mentioned range hood control method when executed by a processor.

[0052] The present disclosure also provides a computer program product, including a computer program, wherein when the computer program is executed by a processor, the control method of the range hood as described above is implemented.

[0053] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0054] The positive and progressive effects of this disclosure are:

[0055] The present invention adds a cross-flow fan at the bottom of the range hood, that is, close to the stove side, to ensure uniform speed of the range hood suction port and increase the overall oil fume suction effect of the range hood. The multi-fan structure can also reduce the size of the range hood centrifugal fan or reduce the speed of the centrifugal fan, thereby reducing the noise of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a first structural schematic diagram of a range hood fan system in the prior art;

[0057] Figure 2 It is a second structural schematic diagram of a range hood fan system in the prior art;

[0058] Figure 3 A schematic structural diagram of a fan system of a range hood provided in Example 1 of the present disclosure;

[0059] Figure 4 A schematic diagram of the product structure of a fan system of a range hood provided in Example 1 of the present disclosure;

[0060] Figure 5 It is a third structural schematic diagram of a range hood fan system in the prior art;

[0061] Figure 6 This is a performance curve of a fan system of a range hood provided in Example 1 of the present disclosure.

[0062] Figure 7 A flow chart of a range hood control method provided in Embodiment 2 of the present disclosure;

[0063] Figure 8 A flowchart of a specific example of a range hood control method provided in Embodiment 2 of the present disclosure;

[0064] Fig. 9 A schematic structural diagram of a fan system of a range hood provided in Embodiment 3 of the present disclosure;

[0065] Fig.10 A schematic diagram of the product structure of a fan system of a range hood provided in Embodiment 3 of the present disclosure;

[0066] Fig.11 A performance curve of a fan system of a range hood provided in Example 3 of the present disclosure;

[0067] Fig.12 A flow chart of a range hood control method provided in Embodiment 4 of the present disclosure;

[0068] Fig.13 A first flow chart of a specific example of a range hood control method provided in Embodiment 4 of the present disclosure;

[0069] Fig.14This is a second flowchart of a specific example of a range hood control method provided in Embodiment 4 of the present disclosure. DETAILED DESCRIPTION

[0070] The present disclosure is further described below by way of examples, but the present disclosure is not limited to the scope of the examples.

[0071] Prefixes such as "first" and "second" are used in the embodiments of the present disclosure only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0072] Example 1

[0073] This embodiment provides a fan system for a range hood, see Figure 3 This embodiment provides a dual fan system, which is a series-parallel system. The fan system of the range hood includes: a centrifugal fan 1 and a cross-flow fan 2.

[0074] The cross-flow fan 2 is arranged at the bottom of the range hood near the stove. The centrifugal fan 1 is arranged at the top of the range hood.

[0075] The cross-flow fan 2 is used to collect the oil smoke at the bottom of the range hood, and the centrifugal fan 1 is used to collect the oil smoke at the top of the range hood.

[0076] See also Figure 4 On the inner wall of the range hood air duct, one side has a bearing that cooperates with the crossflow fan 2, and the other side has a motor that cooperates with the other side of the crossflow fan 2. Therefore, the range hood of this embodiment is a range hood with side suction and top suction functions.

[0077] Figure 5 FIG. 1 is a fan system of an existing range hood, and it can be seen that the fan system only includes a centrifugal fan 1. Figure 5 , this embodiment (see Figure 3 )'s dual-fan structure can effectively reduce the speed of the centrifugal fan without changing its performance, thereby reducing noise.

[0078] It should be noted that Figure 3 and Figure 5 The arrow indicates the direction of wind.

[0079] Here is a brief introduction to the principle:

[0080] See also Figure 5 and Figure 3 , and regard the overall resistance at the parallel connection as P 12 and P 12 ', the pressure rise that the existing fan can provide is ΔP, and the pressure rise that the fan of this embodiment can provide is ΔP'. Then the two systems respectively satisfy:

[0081] ΔP=PP 12 -P3;

[0082] Among them, ΔP is used to represent the pressure rise that the existing fan can provide; P is used to represent the pressure provided by the existing centrifugal fan; P 12 It is used to characterize the overall resistance at the existing range hood parallel connection; P3 is used to characterize the resistance at the existing centrifugal fan.

[0083] ΔP′=P′-P′ 12 -P3;

[0084] Wherein, ΔP' is used to characterize the pressure rise that the fan of this embodiment can provide; P' is used to characterize the pressure provided by the centrifugal fan of this embodiment; P 12 ' is used to characterize the overall resistance at the parallel connection of the range hood of this embodiment; P3 is used to characterize the resistance at the centrifugal fan of this embodiment.

[0085] In the case of ΔP=ΔP', due to the effect of the crossflow fan, P12' is less than P12. The pressure rise required to be provided by the existing centrifugal fan is smaller than that of the centrifugal fan of this embodiment, so the rotation speed of the centrifugal fan of this embodiment is lower than that of the existing centrifugal fan. Therefore, the noise of the range hood fan system of this embodiment is less than that of the existing range hood fan.

[0086] Figure 6 This is the relationship between the performance curves that the centrifugal fan and the crossflow fan of this embodiment need to meet. Figure 6 The horizontal axis represents Airflow Q (air volume), and the vertical axis represents Fan Pressure P (fan pressure). L1 is used to characterize the fan performance curve of the crossflow fan, L3 is used to characterize the performance curve of the centrifugal fan, and L0 is used to characterize the performance curve of the two fans connected in series and parallel in this embodiment. Figure 6 It can be seen that when the range hood is working, the cross-flow fan and the centrifugal fan need to be matched, and the matching process is a dynamic adjustment process.

[0087] In this embodiment, a cross-flow fan is added to the bottom of the range hood, that is, close to the stove side, to ensure that the suction speed of the range hood is uniform, increase the overall oil fume suction effect of the range hood, and solve the problem of suction of oil fume and steam from multiple smoke sources. The multi-fan structure can also reduce the size of the centrifugal fan of the range hood or reduce the speed of the centrifugal fan, and prevent the noise of the centrifugal fan from spreading to the outside space through the range hood outlet, thereby reducing the noise of the range hood.

[0088] Example 2

[0089] This embodiment provides a control method for a range hood, wherein the range hood includes a fan system of the range hood of Embodiment 1, see Figure 7 , the control method of the range hood includes:

[0090] S1. Obtain the air inlet flow rate and air outlet flow rate at the bottom of the range hood.

[0091] S2. Adjust or maintain the current speed of the fan system according to the air inlet flow rate and the air outlet flow rate to balance the performance of the cross-flow fan and the centrifugal fan in the fan system.

[0092] In an optional embodiment, step S2 includes:

[0093] S21. When the air inlet flow rate is greater than a preset air inlet flow rate, reducing the rotation speed of the crossflow fan.

[0094] In an optional embodiment, step S2 includes:

[0095] S22. When the air inlet flow rate is less than the preset air inlet flow rate, increasing the rotation speed of the cross-flow fan.

[0096] In an optional embodiment, step S2 includes:

[0097] S23. When the air inlet flow rate is equal to the preset air inlet flow rate and the air outlet flow rate is greater than the preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced and the rotation speed of the cross-flow fan is increased.

[0098] In an optional embodiment, step S2 includes:

[0099] S24. When the air inlet flow rate is equal to the preset air inlet flow rate and the air outlet flow rate is less than the preset air outlet flow rate, the rotation speed of the centrifugal fan is increased and the rotation speed of the cross-flow fan is reduced.

[0100] In an optional embodiment, step S2 includes:

[0101] S25. When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is equal to the preset air outlet flow rate, the current rotation speeds of the centrifugal fan and the cross-flow fan are maintained.

[0102] This embodiment maintains the performance balance of the crossflow fan and the centrifugal fan in the fan system by adjusting or maintaining the current rotation speed of the fan system, thereby reducing the rotation speed of the centrifugal fan while ensuring the range hood's oil fume absorption effect, thereby reducing the range hood noise.

[0103] The following is a specific example to introduce in detail the control method of the range hood of this embodiment. Figure 8 The workflow for this example is:

[0104] S801. Start the range hood and adjust the wind speed of the cross-flow fan and centrifugal fan to a low setting.

[0105] S802, the crossflow fan and the centrifugal fan operate at a preset speed.

[0106] Among them, the preset speed is set according to the actual situation.

[0107] S803 , real-time detection of the lower air inlet flow rate Q1 and the air outlet flow rate Q.

[0108] S804, determine whether Q1 is equal to the preset air inlet flow Q1', if Q1 is equal to Q1', execute step S805; if Q1 is not equal to Q1', execute step S809.

[0109] Among them, the preset air inlet flow rate is set according to the actual situation.

[0110] S805, determine whether Q is equal to the preset air outlet flow Q', if Q is equal to Q', execute step S806; if Q is not equal to Q', execute step S812.

[0111] Among them, the preset air outlet flow rate is set according to the actual situation.

[0112] S806: Maintain the current state.

[0113] S807: If it is detected that the gear position of the range hood has changed, that is, the user adjusts the gear position or the range hood automatically changes gears, then return to step S802.

[0114] It should be noted that when adjusting to other gears, the flow detection value and the preset value will change accordingly.

[0115] S808. Turn off the range hood.

[0116] S809, determine the size of Q1 and Q1', if Q1 is greater than Q1', execute step S810; if Q1 is less than Q1', execute step S811.

[0117] S810, reduce the rotation speed of the crossflow fan, and return to step S803.

[0118] S811, increase the rotation speed of the crossflow fan, and return to step S803.

[0119] S812, determine the size of Q and Q', if Q is greater than Q', execute step S813; if Q is less than Q', execute step S814.

[0120] S813, reduce the rotation speed of the centrifugal fan and increase the rotation speed of the crossflow fan, and return to step S803.

[0121] S814, increase the rotation speed of the centrifugal fan and reduce the rotation speed of the crossflow fan, and return to step S803.

[0122] It should be noted that Q1 is used to characterize the real-time detected inlet flow rate of the side suction port of the crossflow fan under low wind speed flow; Q1' is used to characterize the theoretical preset inlet flow rate of the side suction port of the crossflow fan under low wind speed flow; Q is used to characterize the real-time detected outlet flow rate under low wind speed flow; Q' is used to characterize the theoretical preset outlet flow rate under low wind speed flow.

[0123] Example 3

[0124] This embodiment provides a fan system for a range hood, see Fig. 9 The fan system of the range hood includes: a centrifugal fan 1, a first cross-flow fan 21 and a second cross-flow fan 22.

[0125] The first crossflow fan 21 and the second crossflow fan 22 are both arranged at the bottom of the range hood near the stove. The first crossflow fan 21 is arranged at a position corresponding to the stove on one side. The second crossflow fan 22 is arranged at a position corresponding to the stove on the other side. The centrifugal fan 1 is arranged at the top of the range hood.

[0126] The first cross-flow fan 21 is used to collect the oil smoke from the stove on one side. The second cross-flow fan 22 is used to collect the oil smoke from the stove on the other side. The centrifugal fan 1 is used to collect the oil smoke on the top of the range hood.

[0127] Fig.10 As shown, in this embodiment, some usage scenarios only have a single smoke source, and it is not necessary for all suction ports to inhale air evenly, only a part of them is needed. In order to fully improve the utilization rate of the lower suction port, the crossflow fan at the lower suction port can be divided into two on the left and right. When only one side of the stove is working, only the crossflow fan on the corresponding side is turned on. Compared with a crossflow fan, it is necessary to add a fixed rotating structural component of the crossflow fan in the middle of the air duct. At this time, the centrifugal fan will match the appropriate speed according to the opening of the single-sided crossflow fan.

[0128] Fig.11 This is the relationship between the performance curves that the centrifugal fan and the two cross-flow fans in this embodiment need to satisfy.

[0129] Fig.11 The horizontal axis represents Airflow Q (air volume), and the vertical axis represents Fan Pressure P (fan pressure). L11 is used to characterize the fan performance curve of the first crossflow fan, L12 is used to characterize the fan performance curve of the second crossflow fan, L3 is used to characterize the centrifugal fan performance curve, and L0 is used to characterize the performance curve of the third fan in this embodiment after being connected in series and parallel.

[0130] Example 4

[0131] This embodiment provides a control method for a range hood, wherein the range hood includes a fan system of the range hood of Embodiment 3, see Fig.12 , the control method of the range hood includes:

[0132] S1201. Determine the operating status of the first cross flow blower and the second cross flow blower.

[0133] S12021. When the first cross-flow fan or the second cross-flow fan is in operation, obtain the flow rate of the first air inlet and the flow rate of the first air outlet at the bottom of the range hood.

[0134] S12031. Adjust or maintain the current rotation speed of the fan system according to the first air inlet flow rate and the first air outlet flow rate to achieve a balanced performance of the fan system during operation.

[0135] In an optional implementation, step S12031 includes:

[0136] When the first air inlet flow rate is greater than the first preset air inlet flow rate, the rotation speed of the crossflow fan in operation is reduced.

[0137] In an optional implementation, step S12031 includes:

[0138] When the first air inlet flow rate is less than the first preset air inlet flow rate, the rotation speed of the cross-flow fan in operation is increased.

[0139] In an optional implementation, step S12031 includes:

[0140] When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is greater than the first preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced and the rotation speed of the cross-flow fan in operation is increased.

[0141] In an optional implementation, step S12031 includes:

[0142] When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is less than the first preset air outlet flow rate, the rotation speed of the centrifugal fan is increased and the rotation speed of the cross-flow fan in operation is reduced.

[0143] In an optional implementation, step S12031 includes:

[0144] When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is equal to the first preset air outlet flow rate, the current rotation speeds of the centrifugal fan and the cross-flow fan in operation are maintained.

[0145] In an optional implementation, step S1201 further includes:

[0146] S12022. When the first cross-flow fan and the second cross-flow fan are both in operation, obtain the flow rate of the second air inlet and the flow rate of the second air outlet at the bottom of the range hood.

[0147] S12032. Adjust or maintain the current rotation speed of the fan system according to the second air inlet flow rate and the second air outlet flow rate to achieve balanced performance of the fan system during operation.

[0148] In an optional implementation, step S12032 includes:

[0149] When the flow rate at the second air inlet is greater than the second preset air inlet flow rate, the rotational speeds of the first cross-flow fan and the second cross-flow fan are reduced.

[0150] In an optional implementation, step S12032 includes:

[0151] When the flow rate at the second air inlet is less than the second preset air inlet flow rate, the rotational speeds of the first cross-flow fan and the second cross-flow fan are increased.

[0152] In an optional implementation, step S12032 includes:

[0153] When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is greater than the second preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced while the rotation speeds of the first cross-flow fan and the second cross-flow fan are increased.

[0154] In an optional implementation, step S12032 includes:

[0155] When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is less than the second preset air outlet flow rate, the rotation speed of the centrifugal fan is increased and the rotation speeds of the first cross-flow fan and the second cross-flow fan are reduced.

[0156] In an optional implementation, step S12032 includes:

[0157] When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is equal to the second preset air outlet flow rate, the current rotation speeds of the centrifugal fan, the first cross-flow fan, and the second cross-flow fan are maintained.

[0158] This embodiment maintains the performance balance of the two crossflow fans and the centrifugal fan in the fan system by adjusting or maintaining the current rotation speed of the fan system, thereby reducing the rotation speed of the centrifugal fan while ensuring the range hood's oil fume absorption effect, thereby reducing the range hood noise.

[0159] The following is a specific example to introduce in detail the control method of the range hood of this embodiment. Fig.13 The workflow for this example is:

[0160] S1301. Start the range hood and adjust the wind speed of the cross-flow fan and centrifugal fan to a low setting.

[0161] S1302, detecting the current of the crossflow fan.

[0162] S1303, determine the number of crossflow fans in operation, if only one crossflow fan is operating, execute step S1304; if two crossflow fans are operating simultaneously, execute step S1309.

[0163] S1304. The single-sided crossflow fan and the centrifugal fan operate at a preset speed.

[0164] Among them, the preset speed is set according to the actual situation.

[0165] S1305, see Fig.14 , execute the workflow of the dynamic adjustment control package, the workflow is the same as step S803 to step S805, and step S809 to step S814.

[0166] S1306. Maintain the current state.

[0167] S1307: If the gear is adjusted, return to step S1304.

[0168] S1308. If the double-sided cross-flow fans are turned on, execute step S1309.

[0169] S1309: The double-sided crossflow fans and the centrifugal fans operate at a preset speed, and step S1305 is executed.

[0170] S1310: If the gear is adjusted, return to step S1309.

[0171] S1311. If the single-sided cross-flow fan is turned on, execute step S1304.

[0172] S1312. Turn off the range hood.

[0173] It should be noted that the theoretical preset air inlet flow rate when turning on a single-sided crossflow fan is different from the theoretical preset air inlet flow rate when turning on a double-sided crossflow fan, and the theoretical preset air outlet flow rate when turning on a single-sided crossflow fan is also different from the theoretical preset air outlet flow rate when turning on a double-sided crossflow fan.

[0174] Example 5

[0175] The embodiments of the present disclosure further provide a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the control method of the range hood provided in any of the above embodiments is implemented.

[0176] The readable storage medium may include but is not limited to: a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device or any suitable combination of the above.

[0177] Example 6

[0178] The embodiment of the present disclosure further provides a computer program product, including a computer program, wherein when the computer program is executed by a processor, the control method of the range hood described in any one of the above items is implemented.

[0179] Among them, the program code for executing the computer program product of the present disclosure can be written in any combination of one or more programming languages, and the program code can be executed completely on the user device, partially on the user device, as an independent software package, partially on the user device and partially on a remote device, or completely on the remote device.

[0180] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A fan system for a range hood, characterized in that: The fan system of the range hood includes: a centrifugal fan and a cross-flow fan; The cross-flow fan is arranged at the bottom of the range hood near the stove; the centrifugal fan is arranged at the top of the range hood; The cross-flow fan is used to collect the oil smoke at the bottom of the range hood; the centrifugal fan is used to collect the oil smoke at the top of the range hood.

2. A range hood control method, characterized in that: The range hood comprises the fan system of the range hood according to claim 1, and the control method of the range hood comprises: Get the air inlet flow rate and air outlet flow rate at the bottom of the range hood; The current rotation speed of the fan system is adjusted or maintained according to the air inlet flow rate and the air outlet flow rate, so as to balance the performance of the crossflow fan and the centrifugal fan in the fan system.

3. The control method of the range hood according to claim 2, characterized in that: The step of adjusting or maintaining the current rotation speed of the fan system according to the air inlet flow rate and the air outlet flow rate comprises: When the air inlet flow rate is greater than a preset air inlet flow rate, reducing the rotation speed of the crossflow fan; and / or, When the air inlet flow rate is less than a preset air inlet flow rate, increasing the rotation speed of the crossflow fan; and / or, When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is greater than the preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced and the rotation speed of the crossflow fan is increased; and / or, When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is less than the preset air outlet flow rate, the rotation speed of the centrifugal fan is increased and the rotation speed of the crossflow fan is reduced; and / or, When the air inlet flow rate is equal to the preset air inlet flow rate, and the air outlet flow rate is equal to the preset air outlet flow rate, the current rotation speeds of the centrifugal fan and the cross-flow fan are maintained.

4. A fan system for a range hood, characterized in that: The fan system of the range hood comprises: a centrifugal fan, a first cross-flow fan and a second cross-flow fan; The first crossflow fan and the second crossflow fan are both arranged at the bottom of the range hood near the stove; the first crossflow fan is arranged at a position corresponding to the stove on one side; the second crossflow fan is arranged at a position corresponding to the stove on the other side; the centrifugal fan is arranged at the top of the range hood; The first cross-flow fan is used to collect oil smoke from the stove on one side; the second cross-flow fan is used to collect oil smoke from the stove on the other side; and the centrifugal fan is used to collect oil smoke on the top of the range hood.

5. A method for controlling a range hood, characterized in that: The range hood comprises the fan system of the range hood according to claim 4, and the control method of the range hood comprises: determining an operating state of the first cross flow fan and the second cross flow fan; When the first cross-flow fan or the second cross-flow fan is in operation, obtaining a flow rate of a first air inlet and a flow rate of a first air outlet at the bottom of the range hood; The current rotation speed of the fan system is adjusted or maintained according to the first air inlet flow rate and the first air outlet flow rate to achieve a balanced performance of the fan system during operation.

6. The control method of the range hood according to claim 5, characterized in that: After the step of determining the operating status of the first cross flow fan and the second cross flow fan, the step further includes: When the first cross-flow fan and the second cross-flow fan are both in operation, obtaining a flow rate of a second air inlet and a flow rate of a second air outlet at the bottom of the range hood; The current rotation speed of the fan system is adjusted or maintained according to the second air inlet flow rate and the second air outlet flow rate to balance the performance of the fan system during operation.

7. The control method of the range hood according to claim 5, characterized in that: The step of adjusting or maintaining the current rotation speed of the fan system according to the first air inlet flow rate and the first air outlet flow rate comprises: When the first air inlet flow rate is greater than a first preset air inlet flow rate, reducing the speed of the crossflow fan in operation; and / or, When the flow rate of the first air inlet is less than the first preset air inlet flow rate, increasing the speed of the crossflow fan in operation; and / or, When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is greater than the first preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced and the rotation speed of the crossflow fan in operation is increased; and / or, When the first air inlet flow rate is equal to the first preset air inlet flow rate, and the first air outlet flow rate is less than the first preset air outlet flow rate, increasing the rotation speed of the centrifugal fan and reducing the rotation speed of the crossflow fan in operation; and / or, When the first air inlet flow rate is equal to a first preset air inlet flow rate, and the first air outlet flow rate is equal to a first preset air outlet flow rate, the current rotation speeds of the centrifugal fan and the cross-flow fan in operation are maintained.

8. The control method of the range hood according to claim 6, characterized in that: The step of adjusting or maintaining the current rotation speed of the fan system according to the second air inlet flow rate and the second air outlet flow rate comprises: When the second air inlet flow rate is greater than the second preset air inlet flow rate, reducing the rotation speeds of the first cross flow fan and the second cross flow fan; and / or, When the flow rate of the second air inlet is less than the second preset air inlet flow rate, increasing the rotation speeds of the first cross flow fan and the second cross flow fan; and / or, When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is greater than the second preset air outlet flow rate, the rotation speed of the centrifugal fan is reduced while the rotation speeds of the first cross-flow fan and the second cross-flow fan are increased; and / or, When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is less than the second preset air outlet flow rate, increasing the rotation speed of the centrifugal fan and reducing the rotation speeds of the first cross-flow fan and the second cross-flow fan; and / or, When the second air inlet flow rate is equal to the second preset air inlet flow rate, and the second air outlet flow rate is equal to the second preset air outlet flow rate, the current rotation speeds of the centrifugal fan, the first cross-flow fan, and the second cross-flow fan are maintained.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the range hood according to any one of claims 2 or 3, 5-8 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the control method of the range hood as described in any one of claims 2 or 3, 5-8 is implemented.

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