A range hood overall power control method and range hood

Abstract

This invention discloses a method for controlling the overall power of a range hood and a range hood itself. The control method includes the following steps: S1: setting the rated power Pe of the range hood and the allowable fluctuation range of the rated power Pe; S2: comparing the power value P calculated in the steam stage of the cleaning function in real time. 蒸汽 S3: In real time, compare the total power value P calculated in the hot water stage of the cleaning function with the allowable fluctuation range of the rated power Pe, and adjust the gear of the main motor according to the comparison result. This method ensures that the total power of the machine during the steam stage and hot water stage of the cleaning function is within the allowable fluctuation range of the rated power Pe, effectively reducing the risk that the range hood using PTC material as a heater will be found to have power that does not meet the certification requirements during spot checks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a range hood overall power control method and a range hood. BACKGROUND

[0002] At present, some range hoods on the market have an automatic steam washing function. The whole cleaning process is generally divided into four stages, namely, a steam stage, a hot water stage, an oil throwing stage and a drying stage. The steam stage is mainly used to generate high-temperature steam to melt oil, so that the oil stains are dissolved and loosened under high-temperature steam. The hot water stage is mainly used to wash the oil stains dissolved and loosened under high-temperature steam with high-speed hot water. The oil throwing stage is used to throw out the loosened oil stains that are not completely washed by the high-speed hot water with a fan wheel rotating at high speed. The drying stage is used to remove the water vapor generated in the cleaning process in the range hood cavity to keep the range hood cavity dry.

[0003] The range hood with the automatic steam washing function generally contains a heating component and a water suction and drainage component. The water suction and drainage component generally uses a water pump to suck and drain water. The heating component is generally divided into two types, PTC type and non-PTC type. The heating power of the PTC type heater changes with the temperature change of the PTC material, while the heating power of the non-PTC type is stable. Since the cost and volume of the heater using PTC material are lower and smaller than those of the heater using non-PTC material with the same power, the heater using PTC material is more common.

[0004] When the non-PTC type heating is used as the heating component of the automatic steam washing function, the power of the heater is stable. When the PTC material is used as the heating component of the automatic steam washing function, the resistance of the PTC material changes with the temperature change due to the characteristics of the PTC material. Therefore, when a fixed voltage is loaded on the PTC heater, the resistance changes due to the temperature change caused by the heating of the heater, so the heating power also changes, and thus the heating power is difficult to control.

[0005] Since household electrical products need to pass the national 3C mandatory product certification, and the certification needs to mark the rated power of the product, for the range hood with the automatic steam washing function, the cleaning function is generally divided into four stages, namely, the steam stage, the hot water stage, the oil throwing stage and the drying stage. The rated power is generally the average power of the steam stage and the hot water stage in the automatic cleaning process.

[0006] Because range hoods using PTC heaters may experience variations in heating power during automatic cleaning due to differences in ambient temperature, water temperature at the pump inlet, thickness of the heater's external heat sink, and temperature probe, this could lead to power fluctuations exceeding the product's rated power range (-10% to +5%), potentially resulting in the product failing inspection. Summary of the Invention

[0007] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention provides a method for controlling the overall power of a range hood and a range hood.

[0008] A method for controlling the overall power of a range hood includes the following steps:

[0009] S1: Set the rated power Pe of the range hood and the allowable fluctuation range of the rated power Pe;

[0010] S2: Real-time comparison of the power value P calculated during the steam phase of the cleaning function. 蒸汽 Adjust the main motor gear according to the comparison results with the allowable fluctuation range of the rated power Pe;

[0011] S3: In real time, compare the total power value P calculated during the hot water stage of the cleaning function with the allowable fluctuation range of the rated power Pe, and adjust the gear of the main motor according to the comparison result.

[0012] Furthermore, the power value P calculated in the steam stage of the cleaning function... 蒸汽 The comparison method with the allowable fluctuation range value of the rated power Pe is as follows:

[0013] Determine the power value P 蒸汽 Whether it is within the allowable fluctuation range of the rated power Pe;

[0014] If so, the main motor will initially operate at the preset speed when transitioning to the hot water stage;

[0015] If the power value P 蒸汽 If the minimum value of the allowable fluctuation range of the rated power Pe is less than the minimum value, then when switching to the hot water stage, the initial main motor speed will be one speed higher than the preset speed.

[0016] If the power value P 蒸汽 If the maximum value of the allowable fluctuation range of the rated power Pe is reached, then the initial main motor speed will be one level lower than the preset speed when switching to the hot water stage.

[0017] Furthermore, the power value P of the steam stage in the cleaning function 蒸汽 The calculation formula is:

[0018]

[0019] wherein, t 蒸汽 is the running time of the steam stage, P HOT1S蒸汽 is the work done by the heater in the first second of the steam stage, P HOT2S蒸汽 is the work done by the heater in the second second of the steam stage, and so on, P HOTt蒸汽 is the work done by the heater in the last second of the steam stage, P1xt1is the work done by the main motor in the first gear in the steam stage, P2xt2is the work done by the main motor in the second gear in the steam stage, and so on, P n xt n is the work done by the main motor in the n-th gear in the steam stage.

[0020] Further, the comparison manner of the calculated whole machine power value P of the hot water stage in the cleaning function with the allowed fluctuation range value of the rated power Pe is:

[0021] judging whether the whole machine power value P is within the allowed fluctuation range value of the rated power Pe;

[0022] if yes, keeping the current main motor gear to run;

[0023] if the whole machine power value P is less than the minimum value of the allowed fluctuation range value of the rated power Pe, increasing one or two gears at the current main motor gear to run;

[0024] if the whole machine power value P is greater than the maximum value of the allowed fluctuation range value of the rated power Pe, increasing one or two gears at the current main motor gear to run.

[0025] Further, the calculation formula of the whole machine power value P of the hot water stage in the cleaning function is:

[0026]

[0027] wherein, P 蒸汽 xt 蒸汽 is the total work done by the heater and the motor in the steam stage, P HOT1S热水 is the work done by the heater in the first second of the hot water stage, P HOT2S热水 is the work done by the heater in the second second of the hot water stage, and so on, P HOT2t热水 is the work done by the heater in the last second of the hot water stage, t 热水 is the running time of the hot water stage.

[0028] Further, the allowed fluctuation range value of the rated power Pe is 0.9xPe-1.05xPe.

[0029] A range hood, the controller of the range hood has the range hood whole machine power control method as described above.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] The present invention calculates the power value P through the steam stage in the cleaning function. 蒸汽 The main motor speed is controlled by comparing the power output with the allowable fluctuation range of the rated power Pe to ensure that the overall power output is within the allowable fluctuation range of the rated power Pe. Then, the overall power output P calculated during the hot water stage of the cleaning function is compared with the allowable fluctuation range of the rated power Pe to further control the main motor speed and ensure that the overall power output is within the allowable fluctuation range of the rated power Pe. This ensures that the overall power output during the steam and hot water stages of the cleaning function is within the allowable fluctuation range of the rated power Pe, effectively reducing the risk that range hoods using PTC materials as heaters will be found to have power output that does not meet certification requirements during spot checks. Attached Figure Description

[0032] Figure 1 This is a flowchart of a method for controlling the overall power of a range hood according to the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of the technical solutions claimed in the present invention.

[0034] like Figure 1 As shown, a method for controlling the overall power of a range hood includes the following steps:

[0035] S1: Set the rated power Pe of the range hood and the allowable fluctuation range of the rated power Pe;

[0036] S2: Real-time comparison of the power value P calculated during the steam phase of the cleaning function. 蒸汽 Adjust the main motor gear according to the comparison results with the allowable fluctuation range of the rated power Pe;

[0037] S3: In real time, compare the total power value P calculated during the hot water stage of the cleaning function with the allowable fluctuation range of the rated power Pe, and adjust the gear of the main motor according to the comparison result.

[0038] The power value P calculated from the steam stage of the cleaning function. 蒸汽The rated power Pe allowed fluctuation range value is compared with the power value P calculated in the steam stage of the cleaning function, and the gear of the main motor is controlled to make the whole machine power within the rated power Pe allowed fluctuation range value, and the rated power Pe allowed fluctuation range value is further compared with the whole machine power value P calculated in the hot water stage of the cleaning function, so that the gear of the main motor is further controlled to make the whole machine power within the rated power Pe allowed fluctuation range value, so that the whole machine power in the steam stage and the hot water stage of the cleaning function can be within the rated power Pe allowed fluctuation range value, and the air volume of the main motor of the range hood at different gears in the hot water stage is adjusted to meet the requirement that the whole machine power is within the rated power allowed fluctuation range. Since the power of the whole machine is adjusted in the hot water stage, the cleaning effect is not affected, and the hardware scheme does not need to be changed, so that the whole machine power can be within the running fluctuation range of the marked rated power. The risk that the range hood using PTC material as a heater is subjected to power inspection and does not meet the certification requirement is effectively reduced. The gear of the main motor is used to adjust the air volume, which is slightly different according to different range hoods, and can be several gears, and the power of each gear is sequentially increased.

[0039] The power value P calculated in the steam stage of the cleaning function 蒸汽 The comparison method of the rated power Pe allowed fluctuation range value is:

[0040] The power value P is judged 蒸汽 whether it is within the rated power Pe allowed fluctuation range value;

[0041] If yes, the initial main motor gear runs at the preset gear when turning into the hot water stage;

[0042] If the power value P 蒸汽 < the minimum value of the rated power Pe allowed fluctuation range value, the initial main motor gear runs at one higher gear than the preset gear when turning into the hot water stage;

[0043] If the power value P 蒸汽 > the maximum value of the rated power Pe allowed fluctuation range value, the initial main motor gear runs at one lower gear than the preset gear when turning into the hot water stage.

[0044] The power value P in the steam stage of the cleaning function 蒸汽 The calculation formula is:

[0045]

[0046] Wherein, t 蒸汽 is the running time of the steam stage, P HOT1S蒸汽 is the work of the heater in the first second of the steam stage, P HOT2S蒸汽 is the work of the heater in the second second of the steam stage, and so on, and P HOTt蒸汽P1xt1 is the work of the main motor in the steam stage at first gear, P2xt2 is the work of the main motor in the steam stage at second gear, and so on, P n xt n P is the work of the main motor in the steam stage at n-th gear, the working voltage applied to the PTC heater is U, and the working current flowing through the PTC heater is I, according to the power formula, the power P of the PTC heater during working is P HOT = I*U, since the working voltage U is a fixed value of 220V in China, the heating power of the heater is determined by the current flowing through the heater, the greater the current, the greater the heating power, and the smaller the current, the smaller the heating power,

[0047] The comparison method of the whole machine power value P calculated in the hot water stage of the cleaning function and the fluctuation range value of the rated power Pe is:

[0048] whether the whole machine power value P is within the fluctuation range value of the rated power Pe;

[0049] If yes, keep the current main motor gear running;

[0050] If the whole machine power value P is less than the minimum value of the fluctuation range value of the rated power Pe, increase one or two gears at the current main motor gear;

[0051] If the whole machine power value P is greater than the maximum value of the fluctuation range value of the rated power Pe, increase one or two gears at the current main motor gear.

[0052] The whole machine power value P calculation formula of the hot water stage of the cleaning function is:

[0053]

[0054] P = P1xt1+P2xt2+…+Pnxtn, wherein, P 蒸汽 xt 蒸汽 P is the total work of the heater and the motor in the steam stage, P HOT1S热水 P is the work of the heater in the first second of the hot water stage, P HOT2S热水 P is the work of the heater in the second second of the hot water stage, and so on, P HOT2t热水 P is the work of the heater in the last second of the hot water stage, t 热水 is the running time of the hot water stage, for example: P HOT1S = U*I1s = 220I1s, since the power work time is 1S, the multiplication by 1 is omitted.

[0055] The sum of the work done by the heater and the motor in the steam phase, added to the sum of the work done by the heater in the hot water phase and the sum of the work done by the motor in the hot water phase, divided by the sum of the time of the steam phase and the hot water phase, allows the power of the whole machine to be calculated.

[0056] The fluctuation range value of the rated power Pe allowed by the present application is 0.9xPe-1.05xPe.

[0057] A range hood, the controller of which has the range hood whole machine power control method as described above.

[0058] The above-described specific embodiments have described the technical solutions and beneficial effects of the present application in detail, and it should be understood that the above-described is only the most preferred embodiment of the present application and is not used to limit the present application, and any modification, supplement and equivalent replacement, etc. made within the principle range of the present application should be included in the protection range of the present application.

Claims

1. A method for controlling the overall power of a range hood, characterized in that, Includes the following steps: S1: Set the rated power Pe of the range hood and the allowable fluctuation range of the rated power Pe; S2: Real-time comparison of the power value P calculated during the steam phase of the cleaning function. 蒸汽 Adjust the main motor gear according to the comparison results with the allowable fluctuation range of the rated power Pe; S3: In real time, compare the total power value P calculated during the hot water stage of the cleaning function with the allowable fluctuation range of the rated power Pe, and adjust the gear of the main motor according to the comparison result; The power value Psteam in the steam stage of the cleaning function is calculated using the following formula: Among them, t 蒸汽 P is the operating time of the steam stage. HOT1S蒸汽 P represents the work done by the heater in the first second of the steam stage. HOT2S蒸汽 For the work done by the heater in the second second of the steam phase, and so on, P HOTt蒸汽 For the work done by the heater in the last second of the steam stage, the main motor P1×t1 operates at its first speed during the steam stage, the main motor P2×t2 operates at its second speed during the steam stage, and so on. n ×t n The main motor performs work in the steam stage at gear n; The comparison method between the total power value P calculated during the hot water stage of the cleaning function and the allowable fluctuation range of the rated power Pe is as follows: Determine whether the total power value P is within the allowable fluctuation range of the rated power Pe; If so, then maintain the current main motor speed. If the total power value P is less than the minimum value of the allowable fluctuation range of the rated power Pe, then the main motor will be operated at one or two higher gears. If the total power value P > the maximum value of the allowable fluctuation range of the rated power Pe, then the main motor will be operated at one or two gears higher than the current gear. The formula for calculating the total power value P of the cleaning function during the hot water stage is: Among them, P 蒸汽 ×t 蒸汽 P is the total work done by the heater and motor during the steam stage. HOT1S热水 P represents the work done by the heater in the first second of the hot water stage. HOT2S热水 P represents the work done by the heater in the second second of the hot water stage, and so on. HOTt热水 For the work done by the heater in the last second of the hot water stage, t 热水 This refers to the running time during the hot water stage.

2. The method for controlling the overall power of a range hood according to claim 1, characterized in that, The power value P calculated in the steam stage of the cleaning function 蒸汽 The comparison method with the allowable fluctuation range value of the rated power Pe is as follows: Determine the power value P 蒸汽 Whether it is within the allowable fluctuation range of the rated power Pe; If so, the main motor will initially operate at the preset speed when transitioning to the hot water stage; If the power value P 蒸汽 If the minimum value of the allowable fluctuation range of the rated power Pe is less than the minimum value, then when switching to the hot water stage, the initial main motor speed will be one speed higher than the preset speed. If the power value P 蒸汽 If the maximum value of the allowable fluctuation range of the rated power Pe is reached, then the initial main motor speed will be one level lower than the preset speed when switching to the hot water stage.

3. The method for controlling the overall power of a range hood according to any one of claims 1 and 2, characterized in that, The allowable fluctuation range of the rated power Pe is 0.9xPe to 1.05xPe.

4. A range hood, characterized in that, The controller of the range hood has the range hood power control method as described in any one of claims 1 to 3.

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