A vacuum cleaner and a method for controlling the vacuum cleaner.

Abstract

This application discloses a vacuum cleaner and a control method for the vacuum cleaner, comprising: a detection module for detecting dust passing through a vacuum channel and obtaining a detection result; a first signal generation module for outputting a first dust detection signal corresponding to the number of dust particles based on the detection result; a second signal generation module for accumulating and transforming the first dust detection signal and outputting a second dust detection signal; and a control module for setting the power supply and generating a corresponding control signal based on the first and second dust detection signals to control an electric fan. The vacuum cleaner provided in this application can combine the first dust detection signal corresponding to the number of dust particles and the second dust detection signal obtained based on the quantity transformation to control the power of the electric fan. This allows for less power consumption and increased battery life when there are many small dust particles, thus reducing power consumption.

Description

Technical Field

[0001] This application relates to the field of intelligent cleaning equipment technology, specifically to a vacuuming device. Background Technology

[0002] Existing intelligent dust removal equipment uses dust recognition technology that can only identify the amount of dust. When there is a lot of dust, the power of the whole machine is increased.

[0003] This method has two problems: First, if the dust density is not high but the particles are large, the large particles cannot be effectively sucked in if the power is not increased. Second, if there is a lot of small dust, the low power can suck it in, but if the power is adjusted to a high power, the overall battery life will be sacrificed. Summary of the Invention

[0004] The technical objective of this application is to solve the above-mentioned technical problems and provide a dust collection device that can identify large dust particles, effectively distinguish between high-density dust and large dust particles, and enable low-density large dust particles to be effectively sucked up.

[0005] To achieve the above technical objectives, this application adopts the following technical solution.

[0006] In a first aspect, embodiments of this application provide a vacuuming device, including:

[0007] The detection module is used to detect dust passing through the suction channel and obtain the detection results;

[0008] The first signal generation module is used to output a first dust detection signal corresponding to the number of dust particles based on the detection result;

[0009] The second signal generation module is used to accumulate and transform the first dust detection signal and output the second dust detection signal.

[0010] The control module is used to generate corresponding control signals based on the first dust detection signal and the second dust detection signal to control the electric fan.

[0011] In some embodiments, the detection module includes a transmitting unit and a receiving unit, the transmitting unit includes a transmitting diode, the receiving unit includes a receiving diode, and the dust suction channel is disposed between the transmitting unit and the receiving unit.

[0012] In some embodiments, the transmitting unit includes a transmitting amplifier unit and a transmitting diode connected in series. The transmitting amplifier unit has a transmitting control terminal, which is connected to the control module for receiving a transmitting control signal.

[0013] In some embodiments, the vacuuming device further includes a detection signal acquisition unit, which has a signal input terminal and a signal output terminal. The signal input terminal is connected to the output terminal of the detection module, and the signal output terminal is connected to the control module, for transmitting the detection result to the control module so that the control module adjusts the transmission control signal according to the detection result.

[0014] In some embodiments, the receiving unit includes a receiving diode and a receiving amplification unit connected in series, the receiving amplification unit being used to amplify the signal acquired by the receiving diode.

[0015] In some embodiments, the second signal generation module includes an integration unit, which integrates the first dust detection signal to obtain the second dust detection signal and outputs the second dust detection signal to the control module.

[0016] In some embodiments, the integration unit includes a capacitor; the second signal generation unit further includes a discharge unit connected in parallel with the capacitor, and the discharge unit has a discharge control terminal connected to the control module to receive a discharge control signal.

[0017] In some embodiments, the second signal generation module further includes an integration amplification unit connected to the integration unit, the integration amplification unit being used to amplify the second dust detection signal output by the integration unit.

[0018] In some embodiments, the first signal generation module includes a pulse generation unit connected between the detection module and the control module. The pulse generation unit is used to perform pulse signal waveform transformation based on the detection result to obtain the first dust detection signal, and output the first dust detection signal to the second signal generation module and the control module.

[0019] In some embodiments, the first signal generation module further includes a level adjustment unit connected between the pulse generation unit and the control module. The level adjustment unit is used to convert the level of the first dust detection signal generated by the pulse generation unit to the level required by the control module.

[0020] Secondly, this application provides a vacuuming device, comprising:

[0021] The detection module is used to detect dust passing through the suction channel and obtain the detection results;

[0022] The first signal generation module is used to output a first dust detection signal corresponding to the number of dust particles based on the detection result;

[0023] The second signal generation module is used to output a second dust detection signal related to the size of the dust based on the first dust detection signal;

[0024] The control module is used to generate corresponding control signals based on the first dust detection signal and the second dust detection signal to control the electric fan.

[0025] In some embodiments, the first signal generation module includes a pulse generation unit, which performs pulse signal waveform transformation on the detection result and outputs a pulse signal as a first dust detection signal.

[0026] In some embodiments, the second signal generation module includes an integration unit, which integrates the high-level time of the pulse signal to obtain the second dust detection signal and outputs the second dust detection signal to the control module.

[0027] Thirdly, this application provides a method for controlling a vacuum cleaner device, including:

[0028] Dust passing through the suction channel is detected, and the results are obtained.

[0029] Based on the detection results, a first dust detection signal corresponding to the amount of dust is output;

[0030] Based on the first dust detection signal, a second dust detection signal related to the size of the dust is output.

[0031] Based on the first dust detection signal and the second dust detection signal, a corresponding control signal is generated to control the electric fan.

[0032] In some implementations, the first dust detection signal is a pulse signal.

[0033] In some embodiments, the second dust detection signal is an AD integral signal obtained by accumulating the high-level time corresponding to the pulse signal.

[0034] In some implementations, a corresponding control signal is generated based on the first dust detection signal and the second dust detection signal, including:

[0035] Determine the number of pulses of the pulse signal and the integral value of the AD integral signal within the set period;

[0036] The dust particle size class is determined based on the integral value of the AD integral signal and the number of pulses;

[0037] A corresponding control signal is generated based on the dust particle size level.

[0038] In some implementations, the dust particle size class is determined based on the ratio of the integral value of the AD integral signal to the number of pulses.

[0039] In some implementations, the dust particle size class is finally determined by introducing a correction coefficient based on the ratio of the integral value of the AD integral signal to the number of pulses.

[0040] Compared with the prior art, the dust collection device provided in this application embodiment can combine a first dust detection signal corresponding to the amount of dust and a second dust detection signal obtained based on the quantity conversion to control the power of the electric fan. It can comprehensively consider the amount of dust and the cumulative conversion result to adjust the optimal electric fan drive power. When there are many dust particles but the particles are small, it is not necessary to adjust to a higher power, thereby reducing power consumption and increasing the battery life.

[0041] The vacuum cleaner provided in this embodiment includes a detection signal acquisition unit. After a period of use, dust may accumulate on the transmitter and receiver of the detection module, potentially affecting the strength of the received signal. To adjust the received signal strength, the transmission control signal can be adjusted by acquiring the detection results output by the detection module, thereby improving the performance of the detection module.

[0042] The dust collection device provided in this application embodiment combines a first dust detection signal corresponding to the amount of dust and a second dust detection signal related to the size of the dust to adjust the driving power of the electric fan accordingly. This can effectively adjust the driving power of the dust collection device, thereby improving the overall operating efficiency of the machine, achieving optimal efficiency, and saving energy.

[0043] The control method for the vacuuming device provided in this application embodiment detects dust passing through the vacuuming channel and obtains the detection result; outputs a first dust detection signal corresponding to the amount of dust based on the detection result; outputs a second dust detection signal related to the size of the dust based on the first dust detection signal; and generates a corresponding control signal based on the first dust detection signal and the second dust detection signal to control the electric fan. This method can comprehensively consider the amount and size of dust to adjust the optimal driving power of the electric fan. When there are many small dust particles, it is not necessary to adjust to a higher power, thereby reducing power consumption and increasing battery life. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a vacuum cleaner provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the structure of a vacuum cleaner according to another embodiment of this application;

[0047] Figure 3 This is a flowchart illustrating the operation of the vacuum cleaner device provided in the embodiments of this application;

[0048] Figure 4 A schematic diagram of the transmitting unit of the vacuum cleaner provided in the embodiments of this application;

[0049] Figure 5 A circuit diagram of the vacuum cleaner provided in the embodiments of this application;

[0050] Figure 6 Waveform diagram of the pulse signal HW_OUT of the vacuum cleaner provided in the embodiments of this application;

[0051] Figure 7 The waveform diagram showing the relative relationship between P_DIS, AD, and HW_OUT within time T of the vacuum cleaner device provided in the embodiments of this application.

[0052] Figure label:

[0053] 100-Dust collection device, 1-Detection module, 2-First signal generation module, 3-Second signal generation module, 4-Control module, 5-Electric fan, 6-Operation module, 11-Transmitting unit, 12-Receiving unit, 13-Detection signal acquisition unit, 21-Pulse generation unit, 22-Level adjustment unit, 31-Integration unit, 32-Integration amplification unit, 33-Discharge unit. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0055] In related technologies, the dust recognition technology of the vacuum cleaner 100 can only identify the amount of dust. When there is a lot of dust, the power of the whole machine is increased. This method has the following two problems: First, if the dust density is not high but the particles are large, the power is not increased, so the large particles cannot be effectively sucked up; second, if there is a lot of small dust, a low power can suck it up, and if the power is adjusted to a high power, the overall battery life will be sacrificed.

[0056] The present application will be described below with reference to the embodiments.

[0057] Example 1

[0058] Figure 1 This is a schematic diagram of the structure of a vacuum cleaner 100 provided in an embodiment of this application, as shown below. Figure 1 As shown, the vacuum cleaner 100 includes:

[0059] Detection module 1 is used to detect dust passing through the dust suction channel and obtain detection results;

[0060] The first signal generation module 2 is used to output a first dust detection signal corresponding to the number of dust particles based on the detection result;

[0061] The second signal generation module 3 is used to accumulate and transform the first dust detection signal and output the second dust detection signal.

[0062] The control module 4 is used to set the power supply and generate corresponding control signals based on the first dust detection signal and the second dust detection signal, and output the control signals to control the electric fan 5.

[0063] The existing dust recognition methods of vacuum cleaners have two problems: First, if the dust density is not high but the particles are large, the power is not increased, so the large particles cannot be effectively sucked up; second, if there are many small dust particles, the power can be sucked up, but if the power is adjusted to a high level, the overall battery life will be sacrificed.

[0064] In this embodiment, the first signal generation module 2 generates a first dust detection signal related to the amount of dust, and the second signal generation module 3 performs an accumulation transformation based on the first dust detection signal to obtain a second dust detection signal. Both the first and second dust detection signals are input to the control module 4.

[0065] The control module 4 adjusts the power of the electric fan 5 based on the first dust detection signal and the second dust detection signal, taking into account the amount of dust and the cumulative transformation results, and adjusts the optimal driving power of the electric fan 5.

[0066] The vacuum cleaner 100 provided in this application embodiment can be applied to handheld vacuum cleaners, robotic vacuum cleaners or intelligent robots, floor scrubbers (dry / wet vacuum cleaners, or wet vacuum cleaners), etc. The vacuum cleaner 100 includes an electric fan 5, which generates suction to pick up dust.

[0067] The detection module 1 of the electric fan 5 can collect the sensing signal generated by dust passing through the dust suction channel. This sensor or other detection devices can be used. In some embodiments, the detection module 1 can use an infrared sensor, which is a sensor that can sense infrared light and convert it into a usable output signal for detecting dust passing through the dust suction channel.

[0068] The first signal generation module 2 is used to output a first dust detection signal corresponding to the amount of dust based on the detection result. In some embodiments, the first signal generation module 2 may employ a pulse circuit to generate a pulse signal based on the detection result. The pulse signal is represented by a high level and a low level in a digital circuit to indicate a 1 state and a 0 state, respectively. In addition to generating electrical pulses, the pulse circuit may also include amplification, transformation, and shaping of the electrical pulses.

[0069] In some embodiments, the first signal generation module 2 includes a pulse generation unit 21 connected between the detection module 1 and the control module 4. The pulse generation unit 21 is used to perform pulse signal waveform transformation based on the detection result to obtain a first dust detection signal, and output the first dust detection signal to the second signal generation module 3 and the control module 4. In this embodiment, the first dust signal is a pulse signal, and the number of pulses is related to the amount of dust.

[0070] In some embodiments, the second signal generation module 3 includes an integration unit 31, which integrates the first dust detection signal to obtain a second dust detection signal and outputs the second dust detection signal to the control module 4.

[0071] In some embodiments, the integration unit 31 may include a capacitor. During the integration process, current flows through the capacitor to accumulate charge. The voltage across the capacitor increases as the pulse signal replenishes the charge. During the release process, by connecting the resistor circuit, the charge across the capacitor is released as current flows through the resistor, making the voltage across the capacitor equal.

[0072] For example, integration unit 31 can be an RC integrator, which is a series RC network that can generate an output signal corresponding to the integration process.

[0073] The control module 4 sets the power supply and generates a corresponding control signal based on the first dust detection signal and the second dust detection signal, and outputs the control signal to control the electric fan 5.

[0074] Example 2

[0075] like Figure 2As shown, in other embodiments of the vacuum cleaner 100, the integration unit 31 includes a capacitor; based on the above embodiments, the second signal generation module 3 further includes a discharge unit 33, which is connected in parallel with the capacitor, and the discharge unit 33 has a discharge control terminal, which is connected to the control module 4 to receive the discharge control signal P_DIS.

[0076] The discharge control signal P_DIS output by the control module 4 controls the discharge unit 33 to discharge the capacitor of the integrator unit 31, which is simple to operate and more efficient.

[0077] In this embodiment, as Figure 2 As shown, the detection module 1 includes a transmitting unit 11 and a receiving unit 12. The transmitting unit 11 includes a transmitting diode, and the receiving unit 12 includes a receiving diode. A dust extraction channel is disposed between the transmitting unit 11 and the receiving unit 12. The transmitting diode emits infrared light, and the receiving diode detects the reflection or scattering of the infrared light. The ends of the transmitting diode and the receiving diode are aligned together, forming a transmitting-receiving pair. The detection module 1 uses transmitting and receiving diodes, which provides fast response speed, good stability, and accurate signal transmission.

[0078] Optionally, the emitting diode and the receiving diode can be infrared diodes or laser diodes. The emitting diode emits a light signal, which is reflected by dust particles of different sizes. The receiving diode receives the reflected light and outputs a detection signal through the receiving unit 12.

[0079] In other embodiments, the transmitting unit 11 in the detection module 1 includes a transmitting amplification unit and a transmitting diode connected in series. The transmitting amplification unit has a transmitting control terminal, which is connected to the control module 4 and used to receive a transmitting control signal (such as...). Figure 4 The transmit_ctrl signal in the transmitter module 11 is used to control the transmission intensity of the transmitter unit 11. The transmit amplification unit increases the power of the transmitted signal. The control module 4 can output a transmit control signal to the transmit control terminal to control the power of the transmitted signal.

[0080] The receiving unit 12 includes a receiving diode and a receiving amplification unit connected in series. The receiving amplification unit is used to amplify the signal acquired by the receiving diode, thereby improving the receiving sensitivity.

[0081] During the vacuuming process, when dust flows through the vacuuming channel, part of the light emitted from the transmitting unit 11 is blocked by the dust, causing a change and reduction in the amount of light received by the receiving unit 12, and consequently reducing the output voltage. The received signal is amplified by the receiving amplification unit. Optionally, the receiving unit 12 may also have a filtering function to filter out noise signals of other frequencies, while retaining the center frequency signal for amplification.

[0082] In some embodiments, the vacuuming device 100 further includes a detection signal acquisition unit 13, which has a signal input terminal and a signal output terminal. The signal input terminal is connected to the output terminal of the detection module 1, and the signal output terminal is connected to the control module 4, for transmitting the detection result to the control module 4 so that the control module 4 adjusts the transmission control signal according to the detection result. Considering that in some application scenarios, the sensing device in the detection module 1 may be covered with dust, affecting the received signal strength, this embodiment can control the transmission power by adjusting the transmission control signal transmit_ctrl based on the strength of the acquired received signal, thus forming a feedback loop.

[0083] By setting up the aforementioned detection signal acquisition unit 13, the signal strength received by the receiving unit 12 can be detected in a timely manner. When the received signal strength does not meet the requirements, the control module 4 adjusts the output transmission control signal transmit_ctrl in a timely manner to control the transmission strength of the transmitting unit 11, thereby ensuring the reliable function of the detection module 1. After the dust collection device 100 has been used for a period of time, dust will accumulate on the transmitting unit 11 or the receiving unit 12 in the detection module 1, resulting in low received signal strength. Through the embodiments of this application, the received signal strength can be compensated.

[0084] In some embodiments, the pulse generation unit 21 may employ, as shown in the following example: Figure 5 The weak signal comparator implementation shown is illustrated.

[0085] In this embodiment, the first signal generation module 2 includes a pulse generation unit 21 and a level adjustment unit 22, which may include a diode and a Zener diode.

[0086] The level adjustment unit 22 is connected between the pulse generation unit 21 and the control module 4. The level adjustment unit 22 is used to convert the level of the first dust detection signal generated by the pulse generation unit 21 to the level required by the control module 4. In some embodiments, the level of the pulse output by the pulse generation unit 21 does not match the level of the input signal to the control module 4. The level adjustment unit 22 enables normal communication between the pulse generation unit 21 and the control module 4. The level adjustment unit 22 can also perform signal filtering.

[0087] In such Figure 2 In the illustrated embodiment, the second signal generation module 3 further includes an integration amplification unit 32 connected to the integration unit 31. The integration amplification unit 32 is used to amplify the second dust detection signal output by the integration unit 31 and output the amplified signal to the control module 4.

[0088] In some embodiments, such as Figure 2As shown, the control module 4 can also be connected to the operation module 6. The operation module 6 is used by the user to operate the vacuum cleaner provided in this embodiment of the application to provide power to the vacuum cleaner, so as to control the start or power adjustment of the electric fan 5; or to input operation commands to the control module 4 through the operation module 6, etc.

[0089] Example 3

[0090] This embodiment provides a vacuum cleaner 100, including:

[0091] Detection module 1 is used to detect dust passing through the dust suction channel and obtain detection results;

[0092] The first signal generation module 2 is used to output a first dust detection signal corresponding to the number of dust particles based on the detection result;

[0093] The second signal generation module 3 is used to output a second dust detection signal related to the size of the dust based on the first dust detection signal;

[0094] The control module 4 is used to generate corresponding control signals based on the first dust detection signal and the second dust detection signal to control the electric fan 5.

[0095] The vacuum cleaner provided in this application embodiment can combine a first dust detection signal corresponding to the amount of dust and a second dust detection signal related to the size of dust obtained based on the conversion of the first dust detection signal. According to the first dust detection signal and the second dust detection signal, the power of the electric fan 5 is controlled. The size of dust particles can be determined by comprehensively considering the amount of dust within a time period, and the optimal driving power of the electric fan 5 can be adjusted. When there are many dust particles, but the particles are small, it is not necessary to adjust to a higher power, thereby reducing power consumption and increasing the battery life.

[0096] In some embodiments, the first signal generation module 2 includes a pulse generation unit 21, which performs pulse signal waveform transformation on the detection result and outputs a pulse signal as a first dust detection signal.

[0097] The number of pulses output by the pulse generation unit 21 corresponds to the amount of dust. The more dust detected by the detection module 1, the more pulses are generated; conversely, the fewer dust particles, the fewer pulses are generated. Furthermore, the pulse width is related to the size of the dust particles; larger particles result in wider pulses, while smaller particles produce narrower pulses. It is important to note that calculating the width and size of each pulse individually would require enormous computing power, significantly increasing the cost of the MCU and power consumption. Additionally, calculating the width of a single pulse can introduce substantial errors.

[0098] In some embodiments, the second signal generation module 3 includes an integration unit 31, which integrates the high-level time of the pulse signal to obtain a second dust detection signal, and outputs the second dust detection signal to the control module 4. The pulse signal is integrated and output by the integration unit 31.

[0099] Optionally, the integration unit 31 includes a capacitor.

[0100] In some embodiments, the vacuum cleaner further includes a discharge unit 33 connected in parallel with the capacitor. The discharge unit 33 is connected to the control module 4 and is used to receive a discharge control signal to periodically discharge the capacitor.

[0101] Below, refer to Figure 3 The control method for the vacuum cleaner provided in the embodiments of this application will be described.

[0102] Example 4

[0103] This application provides a control method for a vacuum cleaner 100, including:

[0104] Dust passing through the suction channel is detected, and the results are obtained.

[0105] Based on the detection results, a first dust detection signal corresponding to the amount of dust is output.

[0106] Based on the first dust detection signal, a second dust detection signal is output to indicate the size of the dust particles.

[0107] Based on the first dust detection signal and the second dust detection signal, a corresponding control signal is generated to control the electric fan 5.

[0108] Optionally, the first dust detection signal is a pulse signal.

[0109] Optionally, the second dust detection signal is an AD integral signal obtained by accumulating the time of the high level corresponding to the pulse signal.

[0110] Optionally, an RC integrator circuit can be used to accumulate the high-level time corresponding to the pulse signal to obtain an AD integrated signal. The RC integrator circuit includes a resistor and a capacitor, and the input pulse signal is integrated by the voltage across the capacitor.

[0111] In some embodiments, the control method for the vacuum cleaner further includes periodically discharging the capacitor.

[0112] In some embodiments, a corresponding control signal is generated based on a first dust detection signal and a second dust detection signal, including:

[0113] Determine the number of pulses of the pulse signal and the integral value of the AD integral signal within the set period;

[0114] The dust particle size class is determined based on the integral value and the number of pulses of the AD integral signal;

[0115] The corresponding control signal is generated based on the size level of the dust particles.

[0116] In some embodiments, the integral value of the AD integral signal is compared with the number of pulses to obtain the mean parameter Dmm, which reflects the size of dust particles.

[0117] Since the integral value of the AD integration signal is the time integral of the high level of the pulse within the set period, by comparing the integral value of the AD integration signal with the number of pulses, the average time value of the high level of each pulse within the set period can be obtained, which can reflect the size of the dust particles within the set period.

[0118] The dust particle size level can be determined by comparing the mean parameter Dmm with the set range.

[0119] In some embodiments, considering the irregularity of dust particles, the dust particle size level can be finally determined by introducing a correction coefficient after determining the ratio of the integral value of the AD integral signal to the number of pulses.

[0120] Considering that a larger mean parameter Dmm corresponds to larger dust particles, when the mean parameter Dmm is greater than the set parameter threshold, the probability of dust particles being relatively irregular in shape increases. In this case, the correction coefficient can be appropriately reduced (less than 1), thereby lowering the dust particle size level. This eliminates the need to increase the drive power of the electric fan 5, thus saving energy and reducing energy consumption. Conversely, a smaller mean parameter Dmm corresponds to smaller dust particles. When the mean parameter Dmm is less than the set parameter threshold, the probability of dust particles being relatively regular in shape increases. In this case, the correction coefficient can be set to be close to 1 (not exceeding 1).

[0121] It should be noted that, in specific embodiments, parameter thresholds can be set according to actual needs or the application scenario of the vacuum cleaner, and there is no need to limit them.

[0122] Figure 3 This is a flowchart illustrating the operation of the control method for a vacuum cleaner provided in the embodiments of this application.

[0123] The vacuum cleaner connection power supply provided in this embodiment of the application ( Figure 3 (Not shown in the image), the electric fan 5 of the vacuum cleaner 100 can be started by operation instruction via operation module 6. Operation module 6 transmits operation instruction signal to control module 4, and control module 4 discharges the capacitor in second signal generation module 3, corresponding to the first timing t1 of the discharge process;

[0124] Determine whether the discharge process of the first timer t1 is complete. If yes, initialize the timer and the interrupt count counter, output the control signal, and start the second timer t2.

[0125] Control module 4 controls the electric fan 5 to operate according to the initially set drive power, generating suction to draw in dust. The set initial drive power is expressed as Wbase.

[0126] During the suction of dust by the vacuuming device 100, the detection module 1 detects the dust passing through the suction channel and generates a detection result. The detection result is related to the light received by the receiving unit 12 in the detection module 1, and the light received is related to the size and quantity of dust passing through the suction channel.

[0127] The system determines whether the second timer t2 has finished. If not, the detection module 1 continues to detect dust passing through the suction channel, and the first signal generation module 2 continues to generate a pulse signal HW_OUT. The number of pulses in the HW_OUT pulse signal corresponds to the number of dust particles. The second signal generation module 3 continues to integrate the pulse signals of the passing dust particles to generate a second dust detection signal (i.e., an AD integration signal). The control module 4 receives the pulse signal HW_OUT from the first signal generation module 2 and calculates the number of interruptions. The number of interruptions corresponds to the number of times dust passes through the suction channel, i.e., the number of dust particles.

[0128] If the second timer t2 finishes, the control module 4 collects the integral value Sad and the interrupt count Tad output by the second signal generation module 3 at this time, and reinitializes the counter and the interrupt count counter.

[0129] The mean particle size parameter Dmm is calculated using the integral value Sad and the number of interruptions Tad. The expression is: Dmm = Sad / Tad.

[0130] The expression for the mean parameter Dmm shows that a larger interruption count Tad (corresponding to dust particles N) and a smaller integral value Sad indicate smaller dust particles; conversely, a larger interruption count Tad (corresponding to dust particles N) and a larger integral value Sad indicate larger dust particles; and vice versa.

[0131] The particle size results are window-filtered, and the dust particle size level is determined by comparing it with the mean parameter Dmm. Based on the dust particle size level, the corresponding pre-set drive power for that level is used to output the final required drive power. For example, if the required power increase Wstep is determined, the final required drive power W = Wbase + Wstep.

[0132] In control module 4, a table can be preset to compare the average particle size with the driving power.

[0133] In a specific embodiment, different levels can be divided according to the mean parameter Dmm. Optionally, four levels can be determined according to the mean parameter Dmm: level 1 Dk1, level 2 Dk2, level 3 Dk3, and level 4 Dk4, corresponding to dust particles from small to large, and corresponding to the driving power of the electric fan 5 from small to large.

[0134] Within a timing cycle T, the number of pulses is N (the same as the number of interrupts within that cycle). When the calculated mean parameter Dmm is the first level Dk1, the drive power can be the initial drive power Wbase or the initial drive power plus power W1.

[0135] Within time T, when the calculated mean parameter Dmm is the second level Dk2, the driving power is the initial driving power Wbase or the initial driving power plus power W2.

[0136] Within time T, when the calculated mean parameter Dmm is the third level Dk3, the driving power is the initial driving power Wbase plus the power W3.

[0137] Within time T, when the calculated mean parameter Dmm is the fourth level Dk4, the driving power is the initial driving power Wbase plus the power W4.

[0138] Alternatively, W4>W3>W2>W1.

[0139] In specific implementations, considering factors such as the size and quantity of dust particles, a table is set up to compare the mean parameter Dmm of the reaction particle size with the driving power. For example, a fitting method can be used to determine the mean parameter Dmm of the reaction particle size (or the corresponding particle size class) and the corresponding driving power, such as the least squares method.

[0140] In this embodiment of the application, for dust particles of various sizes within a period T, the average parameter Dmm that reflects the particle size is calculated, and the driving power of the electric fan 5 is set accordingly. The optimal driving power of the electric fan 5 can be adjusted. When there are many dust particles, but the particles are small, it is not necessary to adjust to a higher power, thereby reducing power consumption and increasing the battery life.

[0141] Figure 5 The circuit diagram of the vacuum cleaner 100 provided in the embodiments of this application is shown.

[0142] Figure 5 The diagram shows a pulse generation unit 21, which includes a comparator (such as...). Figure 5The comparator U4B shown receives the detection result output by the detection module 1 at both its positive and negative terminals. The positive terminal of the pulse generation unit 21 is connected to the first capacitor. Figure 5 The negative terminal of capacitor C27 is connected to the second capacitor. Figure 5 The capacitance of the first capacitor C27 is greater than that of the second capacitor C29.

[0143] The detection result output by detection module 1 is used as a weak signal input to the positive terminal of the comparator. Since the capacitance of capacitor C27 is relatively large, it is relatively stable when a weak signal passes through the positive terminal. Since the capacitance of capacitor C29 at the negative terminal is relatively small, it is quickly charged and pulled low when a weak signal passes through. The comparator compares the positive and negative terminals to generate a pulse signal.

[0144] The pulse generation unit 21 can operate stably in the high-frequency region without oscillation. Existing weak pulse signal processing circuits, which are based solely on integrated operational amplifier circuits, cannot achieve high-frequency stability. Therefore, the pulse generation unit 21 provided in this embodiment can better adapt to situations where dust particles are small and numerous.

[0145] Figure 5 The integrator unit 31, composed of resistor R39 and capacitor C33, charges capacitor C33. The control module 4 acquires the pulse signal HW_OUT per unit time T. Figure 6 The pulse signal HW_OUT within the period is shown. Figure 6 The intermediate periods T1, T2, and T3 are equal, and are all the same. The number of pulses N within T) and the output AD integral signal after capacitor C33 is charged.

[0146] Control module 4 detects the number of pulses in the pulse signal HW_OUT to determine the amount of dust particles; the more pulses per unit time, the greater the dust density. This integration unit 31 solves various problems such as inaccurate calculation of single pulses and higher costs, and it is simple to implement and reliable in performance.

[0147] Control module 4 determines the relationship between the AD integral signal and N, that is, based on the number of particles per unit time and the integral value of the AD integral signal, it determines the average parameter Dmm that reflects the size of dust particles.

[0148] If the data from the RC integrator circuit is sufficiently distinguishable, then the integrator amplifier unit 32 is not used. If more precise distinction is desired, then the integrator amplifier unit 32 is added.

[0149] Figure 5In the discharge unit 33, resistor R38 and transistor Q2 form a discharge circuit for capacitor C33. After a unit time T, the discharge control signal P_DIS is set high, transistor Q2 is turned on, capacitor C33 discharges rapidly, the AD integration signal detects that capacitor C33 has finished discharging, the discharge control signal P_DIS is pulled low, transistor Q2 is turned off, RC charging begins, and control module 4 continues to make judgments for the next cycle.

[0150] Figure 7 This represents the relative relationship between P_DIS, AD, and HW_OUT over time T. Figure 7 It can be seen that during period T1, the pulse generation unit outputs a pulse signal HW_OUT. The number of pulses in the HW_OUT signal corresponds to the amount of dust, and the pulse width corresponds to the size of the dust. The integration unit 31 integrates the pulse signal and outputs an AD integrated signal. At the end of period T1, the control module 4 outputs a discharge control signal P_DIS, controlling the discharge unit 33 to discharge the capacitor in the integration unit 31, and then proceeds to the next period. Figure 6 and Figure 7 As shown, period T1 has 4 pulses and AD T1 Period T2 has 2 pulses and AD T3 Period T3 has 3 pulses and AD T3 Therefore, the mean parameter Dmm (the integral value of the AD integral signal divided by the number of pulses) is different for each cycle, thus allowing for the adjustment of the appropriate motor power.

[0151] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a circuit, structure, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such circuit, structure, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the circuit, structure, article, or apparatus that includes that element.

[0152] In the embodiments provided in this application, it should be understood that the disclosed circuits, structures, articles, or devices can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical, or other forms.

[0153] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units: they may be located in one place or distributed across multiple network units: some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0154] The above are merely embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vacuuming device (100), characterized in that, include: The detection module (1) is used to detect dust passing through the dust suction channel and obtain the detection results; The first signal generation module (2) is used to output a first dust detection signal corresponding to the number of dust particles based on the detection result; The second signal generation module (3) is used to output a second dust detection signal related to the size of the dust based on the first dust detection signal; The control module (4) is used to determine the dust particle size level according to the first dust detection signal and the second dust detection signal; and generate a corresponding control signal according to the dust particle size level, so as to control the driving power of the electric fan (5) from small to large according to the size level of the dust particles; The control module is used to determine the number of pulses of the pulse signal and the integral value of the AD integral signal within a set period, and to determine the dust particle size level based on the integral value of the AD integral signal and the number of pulses.

2. The vacuum cleaner (100) according to claim 1, characterized in that, The first signal generation module (2) includes a pulse generation unit (21), which performs pulse signal waveform transformation on the detection result and outputs a pulse signal as the first dust detection signal.

3. The vacuum cleaner (100) according to claim 2, characterized in that, The second signal generation module (3) includes an integration unit (31), which is used to integrate the high-level time of the pulse signal to obtain the second dust detection signal and output the second dust detection signal to the control module (4).

4. The vacuum cleaner (100) according to claim 2, characterized in that, The pulse generation unit (21) includes a comparator; Both the positive and negative terminals of the comparator are connected to the detection module (1), wherein the positive terminal of the pulse generation unit (21) is connected to the first capacitor and the negative terminal is connected to the second capacitor, and the capacitance value of the first capacitor is larger than that of the second capacitor.

5. The vacuum cleaner (100) according to claim 3, characterized in that, The integration unit (31) includes a capacitor; The second signal generation module further includes a discharge unit (33), which is connected in parallel with the capacitor and has a discharge control terminal connected to the control module (4) to receive a discharge control signal.

6. The vacuum cleaner (100) according to claim 3, characterized in that, The second signal generation module (3) further includes an integration amplification unit (32) connected to the integration unit (31). The integration amplification unit (32) is used to amplify the second dust detection signal output by the integration unit (31) and output the amplified signal to the control module (4).

7. The vacuum cleaner (100) according to claim 2, characterized in that, The pulse generation unit (21) is also used to output the first dust detection signal to the second signal generation module (3) and the control module (4).

8. The vacuum cleaner (100) according to claim 7, characterized in that, The first signal generation module (2) further includes a level adjustment unit (22), which is connected between the pulse generation unit (21) and the control module (4). The level adjustment unit (22) is used to convert the level of the first dust detection signal generated by the pulse generation unit (21) to the level required by the control module (4).

9. A control method for a vacuum cleaner (100), characterized in that, include: Dust passing through the suction channel is detected, and the results are obtained. Based on the detection results, a first dust detection signal corresponding to the amount of dust is output; Based on the first dust detection signal, a second dust detection signal related to the size of the dust is output. The dust particle size level is determined based on the first dust detection signal and the second dust detection signal; According to the dust particle size level, a corresponding control signal is generated to control the driving power of the electric fan (5) from small to large according to the dust particle size level from small to large. Based on the first dust detection signal and the second dust detection signal, the dust particle size level is determined, including: Determine the number of pulses of the pulse signal and the integral value of the AD integral signal within the set period; The dust particle size class is determined based on the integral value of the AD integral signal and the number of pulses.

10. The control method for the vacuum cleaner (100) according to claim 9, characterized in that, The first dust detection signal is a pulse signal.

11. The control method for the vacuum cleaner (100) according to claim 10, characterized in that, The second dust detection signal is an AD integral signal obtained by accumulating the high-level time corresponding to the pulse signal.

12. The control method for the vacuum cleaner (100) according to claim 9, characterized in that, The dust particle size class is determined based on the ratio of the integral value of the AD integral signal to the number of pulses.

13. The control method for the vacuum cleaner (100) according to claim 12, characterized in that, The dust particle size level is finally determined by introducing a correction coefficient based on the ratio of the integral value of the AD integral signal to the number of pulses.

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