A WASHING MACHINE HEIGHT ADJUSTMENT CONTROL METHOD

Abstract

This invention involves the body (2), which rests on a ground under the body (2) and supports the body (2) a height adjustment by adjusting the distance between the body (2) and the ground. at least one leg (3) structured in such a way as to allow it to be made, inside the body (2) located, a boiler (4) in which the washing process is carried out, a motor (5) A drum (6) suitable for turning inside the boiler (3) by means of 10, boiler (4) By detecting its vibrations, it provides at least one real-time data point in the time domain. a sensor (7) configured for operation and a control unit (8) that regulates the operation a height adjustment control suitable for use in a washing machine (1) containing It is related to the method.

Description

1 TARIFF A WASHING MACHINE HEIGHT ADJUSTMENT CONTROL METHOD This invention allows a washing machine to be placed evenly on the floor. 5 with a height adjustment control method that enables the detection of whether it is not positioned correctly. It is related. Before washing machines are used, the distance between the body and the floor... The height adjustment needs to be made on the base of the washing machine. This ensures the washing machine stands level so that it operates without vibration. The washing machine has feet that allow you to adjust the distance between it and the floor. The height adjustment of the machines is performed by the installation service personnel. It is generally not checked again after it has been put into use. This height incorrect settings or, over time, reasons such as cleaning or moving, the machine's malfunction Gradual deterioration due to pushing / pulling, noisy and vibrating operation 15 This is the cause. The laundry moves due to unbalanced forces transmitted to the body. The washing machine can suffer permanent damage by bumping into surrounding objects. Because a slight deviation in the machine's height adjustment is difficult to see with the naked eye, It is very likely that the customer will continue to operate the washing machine in this condition. The resulting noise and vibration can lead customers to form negative judgments regarding their perception of quality. This can cause problems. Therefore, the height adjustment should be checked during operation. to detect and prevent the washing machine from operating in this faulty state This is of critical importance. In the current state of the technology, a balanced height adjustment is essential. It has sensors and methods that enable determining whether or not it is done in this way. There are washing machines available. However, these known methods, at height adjustment of 25 There is a lack of ability to detect situations where there is a millimeter-level imbalance. It remains. Therefore, the height adjustment is precisely measured and the height It is possible to detect even situations where the adjustment is made with a millimeter-level error. A washing machine with a control method is needed. 2 In the Chinese patent application numbered CN109386697A, which falls under the prior art, The system detects that the height adjustment was incorrect and automatically adjusts the height. The text describes a washing machine whose settings have been corrected. The purpose of this invention is to correct an error where a washing machine's height setting is incorrectly adjusted to 5. a height adjustment control that allows the precise determination of whether it needs to be done It is the implementation of the method. The first step taken to achieve the purpose of this invention, and the steps associated with that step... A height adjustment control method defined in the requirements; located within a body 10 a drum that is controlled by a motor which is controlled by a control unit rotating at a predetermined test rotation speed, drum test rotation speed via a sensor that detects vibrations of a boiler while it is being rotated frequency by converting the provided real-time data into the frequency domain At least one working acceleration signal must be generated in the region, and the working acceleration signal must be generated by the generator 15 comparison with a reference acceleration signal previously generated by the system and the working acceleration a predetermined threshold by the manufacturer between the signal and the reference acceleration signal If the difference is greater than the specified value, it is determined that the height adjustment was made incorrectly. It includes the following steps. The test rotation speed is preferably between 100-300 RPM. It is worth. While data is being received from the sensor, the drum rotates at a constant test speed with the motor 20. It is rotated by the motor. The motor is controlled by the control unit. The data received from the sensor is real-time data in the time domain. Real-time The frequency of the data is determined by the control unit using the Fast Fourier transform method. A working acceleration signal is obtained as a result of converting it to the region. Fast Fourier transform is preferably performed between 0-1000 Hz frequency values. 25 The operating acceleration signal is stored by the manufacturer in a memory device of the control unit. It is compared with a reference acceleration signal. The reference acceleration signal is the height. For a situation where the adjustment is perfectly made, it is produced by the manufacturer in the frequency range. It is a signal. The working acceleration signal and the reference acceleration signal are in the frequency domain. Because these are generated signals, a millimeter error in height adjustment is acceptable. Even in this case, there are significant differences between the working acceleration signal and the reference acceleration signal. 3 This is why it is possible to easily correct any errors in height adjustment by the control unit. This can be determined with high precision. Unbalanced load inside the drum As the amount increases, the difference between the working acceleration signal and the reference acceleration signal is increasing. In one application of the invention, the height adjustment control method uses the working acceleration signal. The amplitude ratio, which is the ratio of the amplitude of the reference acceleration signal to the amplitude of the reference acceleration signal, must be 3 or higher. If it is too high, the control unit indicates that the height setting is incorrect. It includes a step where the working acceleration signal and the reference acceleration are determined. The signal has a bandwidth of frequency 10 with a first frequency value and a second frequency value. These are two signals generated in the region. Therefore, they have the same frequency bandwidth value. The amplitudes of two signals generated between them are compared. With the first frequency value... The second frequency value is preferably chosen between 0 and 1000 Hz. Another aspect of the invention... In this application, the amplitude ratio is also determined based on a single selected frequency value. It is calculated. The amplitude ratio is 15 in the frequency domain at a first frequency value. The generated working acceleration signal amplitude is in the frequency domain at the first frequency value. It is obtained by dividing the generated reference acceleration signal by its amplitude. The amplitude ratio is 3. When the height is 1 or higher, the control unit reports an error in the height adjustment. It has been determined that this is the case. Even when there is a light load inside the drum, the height... In case of a slight imbalance in the settings, the specified frequency values ​​will be 20. The difference between the working acceleration signal amplitude and the reference acceleration signal amplitude must be at least 3 times. This ensures that the height adjustment is not incorrectly made by the control unit. The situations are determined quickly. In another application of the invention, the working acceleration signal is converted to a test rotational speed of 25. at least one study by dividing into orders representing harmonics (multiples) Order analysis data is generated. Order analysis is used in the analysis of vibration signals. It is used. Each of the moving parts of the washing machine, such as the motor and drum. Each of these contributes to the noise and vibration patterns. Through order analysis, these To identify, isolate, and evaluate the performance and quality of the components individually. 30 It is possible to analyze the harmonics of the rotational speed. Order analysis 4 This allows for its definition. The first order is the rotational speed of the drum. From this... Each subsequent order is a corresponding multiple of the rotational speed. For example, the second order, The third order is twice the rotational speed of the drum. The third order is three times the rotational speed of the drum. It is rigid. The study order analysis data includes one for each test rotational speed harmonic. The working harmonic amplitudes are determined. In other words, 5 for each order. A separate working harmonic amplitude is determined. The determined working harmonic at least one of their amplitudes corresponds to its own order, predetermined by the manufacturer. the ratio of the harmonic amplitude to a specified reference value is 5 or more When detected, the control unit determines that the height adjustment was incorrect. The height adjustment is corrected, even if the error is only 1 millimeter, resulting in an error of at least one order of magnitude. The working harmonic amplitude is at least 5 times the reference harmonic amplitude. This In this way, the error in height adjustment can be determined precisely. In another application of the invention, the height adjustment control method is first-order. The ratio of the motor rotation speed to the drum rotation speed is an order of magnitude 15. at least one working harmonic amplitude between the reference harmonic and the order of magnitude It includes the step of comparing the amplitudes. Light load inside the drum. Even when this happens and the height adjustment is made with an error of 1 millimeter, it still corresponds to the first order. at least one of the orders among the orders of magnitude in the conversion rate value The working harmonic amplitude is at least 5 times the reference harmonic amplitude. This 20 This allows for accurate identification of situations where the height adjustment was made incorrectly. is provided. In another application of the invention, the control unit cycles with the first order. The harmonic amplitudes used in operations between the ratio values ​​are preferably around 25. The first amplitude sum is obtained by summing them using the root mean square method. is done. In the orders between the first order and the conversion ratio value. preferably root mean square of reference harmonic amplitudes By summing them using this method, a second amplitude sum is obtained. Control unit by, the ratio of the sum of the first amplitudes to the sum of the second amplitudes is 3 or more 30 When this is determined, it is found that the height adjustment was made incorrectly. This allows for height adjustment using an average value obtained from multiple data points. The accuracy of error detection is increased. In another application of the invention, the height adjustment by the control unit is incorrect. When this is detected, an audible and / or visual warning is sent to the user. 5 This alerts the user when the height adjustment needs to be readjusted. is provided. In another application of the invention, the sensor is placed on the boiler. The sensor When placed on the drum, the error in height adjustment is 10 times the drum rotation speed. Order analysis data is obtained to allow for independent perception. In this way, The height adjustment error must be correctly detected by the control unit. This also allows the sensor to be positioned inside the housing. This ensures protection from external influences. In another application of the invention, the sensor is mounted on the foot. This allows, When the sensor is not working properly, it needs to be repaired or replaced. The sensor is made easier to remove. In another application of the invention, the sensor is located on the body. This allows for 20 Access to the sensor by the service operator is facilitated when needed. Thanks to this invention, real-time data can be converted into the frequency domain. Even millimeter-level errors in height adjustment can be detected. A height adjustment control method is implemented. 25 To achieve the purpose of this invention, the height adjustment control method must be implemented. Suitable washing machines are shown in the attached figures; Figure 1 – Schematic view of a washing machine representing an application of the invention. Figure 2 – Detailed perspective of a washing machine drum from an application of the invention. 30 It is the appearance. 6 Figure 3 – Detail of the washing machine foot, representing another application of the invention. It is a perspective view. The parts in the figures are individually numbered, and the corresponding numbers are listed below. It has been given. 5 1. Washing machine 2. Body 3rd Leg 4. Kazan 10 5. Engine 6. Drum 7. Sensor 8. Control unit The height adjustment control method is based on the body (2), located under the body (2), on a floor. by pressing down on the body (2) and adjusting the distance between the body (2) and the ground at least one stand configured to allow for height adjustment (3) a boiler located inside the body (2) in which the washing process is carried out (4), a drum (6) suitable for being rotated inside the boiler (3) by means of a motor (5), 20 by detecting the vibrations of the boiler (4) at least one real-time data in the time domain a sensor (7) configured to provide and a control that regulates the operation A proper control when operating a washing machine (1) containing unit (8) This is the method. The foot (3) is rotated by the user or service operator. The height of the body (2) is adjusted. The height adjustment is done evenly at 25 If this is not done, the vibrations of the shell (2) or the boiler (3) increase. These vibrations affect the sensor. (7) is used to detect vibration or acceleration. Sensor (7) is used to detect vibration or acceleration. This could be a structured vibration sensor, accelerometer, or laser sensor. The control unit (8) obtains real-time data in the time domain from the sensor (7). Real-time data is acceleration data. 30 7 The control method subject to the invention involves the drum (6) rotating over a predetermined test cycle. rotating at speed, the drum (6) is rotated at test speed while the sensor (7) by converting real-time data provided via this method into the frequency domain Generating at least one working acceleration signal in the frequency domain, the working acceleration signal, Comparison with a reference acceleration signal pre-generated by the manufacturer and 5 The working acceleration signal and the reference acceleration signal are pre-defined by the manufacturer. The height adjustment is incorrect if the difference exceeds a specified threshold value. It includes the steps to determine whether it was done. Reference acceleration signal frequency It is a signal generated in the region. The reference acceleration signal ensures perfect altitude adjustment. In this case, it was produced by the manufacturer after taking measurements. Reference acceleration 10 The signal is generated specifically according to the amount of unbalanced load inside the drum (6). For example, the reference acceleration for the case where a 1 kilogram load is loaded into the drum (6) The signal indicates that the height adjustment is perfectly made and the drum (6) is at the test rotation speed. frequency of real time data received from sensor (7) when rotated It was produced by converting it into the region. 1 15 into the drum (6) by the user. by using the data received from the sensor (7) when a kilogram load is loaded The working acceleration signal produced by the control unit (8) is transmitted into the drum (6) 1 The control unit uses a reference acceleration signal generated for the case where a kilogram load is applied. (8) is compared by. In a preferred application of the invention, the drum (6) The amount of load inside is automatically detected by the control unit (8). 20 In another application of the invention, the amount of load inside the drum (6) is determined by the user Frequency can be entered into the control unit (8) via an input unit. The working acceleration signal obtained in the region is determined by the control unit (8). It is compared with a reference acceleration signal specifically generated for the load amount. Control by unit (8), between the working acceleration signal and the reference acceleration signal, the generator 25 When a difference exceeding a predetermined threshold value is identified, It has been determined that the height adjustment is incorrect. Threshold value, drum (6) Specifically determined by the manufacturer according to the load amount inside, and the control unit (8) is recorded in its memory. A 1 kilogram load is placed inside the drum (6). Even when positioned and the height adjustment is made evenly with a 1 millimeter imbalance, it still reaches 30. Critical differences arise between the working acceleration signal and the reference acceleration signal. 8 Thus, height adjustment occurs at levels imperceptible to the user's eye. The fault can be resolved cost-effectively by controlling the unit without using an additional component (8) This ensures that it is detected by them. In one application of the invention, the height adjustment control method uses a first frequency value of 5. and frequency range of a second frequency value higher than the first frequency value Determining the amplitude of the acceleration signal obtained by converting it to the region, The determined working acceleration signal amplitude is the first frequency value and the second frequency a reference value in the frequency domain predetermined by the manufacturer Determining an amplitude ratio, which is the ratio of the acceleration signal to the amplitude, and setting the amplitude ratio to 10. If 3 or more are identified, it indicates that the height adjustment was done incorrectly. It includes the steps for determining real-time data in the time domain. amplitude, phase, etc. within real-time data can be obtained by converting it to the frequency domain. Components are obtained. In this way, the first frequency value of the working acceleration signal is obtained. The amplitude is determined between the first and second frequency values. The determined working acceleration is 15. The signal amplitude is similar to the amplitude of a reference acceleration signal produced in the same frequency ranges. An amplitude ratio is obtained by dividing. For example, 1 into drum (6) when a kilogram load is placed and the height adjustment is made unevenly by 1 millimeter Even in this case, the difference between the working acceleration signal amplitude and the reference acceleration signal amplitude is minimal. A difference of at least 3 times occurs. Thus, the error in height adjustment is precisely 20. This ensures identification. In one application of the invention, the height adjustment control method uses the working acceleration signal. by dividing the test rotational speed into orders representing its harmonics, at least one Generating study order analysis data, study order analysis data for each test 25 Determining the working harmonic amplitudes for the rotational speed harmonic and at least one of the working harmonic amplitudes corresponds to its own order, generator the ratio of a predetermined reference harmonic amplitude to 5 or When it is determined that the height adjustment is incorrect, it is determined that the height is greater than the actual height. It includes the steps. The working acceleration signal, converted to the frequency domain, drum 30 (6) The operational order analysis data is obtained by dividing by the return frequency. 9 The operating harmonic amplitudes for each order are determined by the control unit (8). The reference harmonic amplitude value is determined to ensure perfect amplitude adjustment. In this case, the reference range obtained by measurements taken by the manufacturer. It is generated from reference order analysis data. In other words, reference order analysis data, It is obtained by dividing the reference acceleration signal by the drum (6) rotation frequency. 5 Reference order analysis data and therefore the reference harmonic amplitude value, drum (6) It is specially manufactured according to the amount of unbalanced load inside. At least one of the working harmonic amplitudes has a magnitude corresponding to its own. It is ratioed to the reference harmonic amplitude value. For example, a 3rd order study. The harmonic amplitude is ratioed to the reference harmonic amplitude value of the 3rd order. 10 At least one of the resulting ratios has a value of 5 or greater. When determined, the height adjustment is found to be incorrect by the control unit (8). This ensures that the error in height adjustment is independent of the drum rotation speed. It is ensured that it is perceived in some way. In one application of the invention, the height adjustment control method is the rotational speed of the motor (5). Determining at least one cycle ratio value which is the ratio of the drum (6) rotation speed and at least one of the orders between the first order and the order of the conversion rate value Comparing the working harmonic amplitude with the reference harmonic amplitude It includes. The study order analysis data, preferably with a drum (6) rotation speed of 20 The first order cycle is the ratio of the rotational speed of the motor (5) to the rotational speed of the drum (6). The ratio is produced up to orders of magnitude between the values ​​of the ratio. For example, Order of operation analysis data up to the 15th order when the cycle ratio is 15. It is produced. When the height adjustment is done incorrectly, the working harmonic amplitude increases. The largest differences between the reference harmonic amplitude and the first-order conversion ratio are 25. It occurs in the levels between the levels of value. In other words, When the conversion ratio is 15, the operating harmonic amplitude and the reference harmonic amplitude The biggest differences between them occur between the 2nd and 14th orders. (Study) Comparing the harmonic amplitude with the reference harmonic amplitude using the first order. Thanks to the fact that it is done between the orders of magnitude in terms of the conversion ratio value, the control unit has 30 (8) efficient operation is ensured. In one application of the invention, the control method uses the first of the operating harmonic amplitudes. The gear ratio is the ratio of the rotational speed of the motor (5) to the rotational speed of the drum (6). the sum of the amplitudes of the orders between the values by determining the first amplitude sum and the reference harmonic 5 between the first order of its amplitude and the order of its conversion ratio value a second amplitude sum is determined by summing the amplitudes of the two orders. obtaining and the ratio of the sum of the first amplitudes to the sum of the second amplitudes is 3 or more Steps to determine if the height adjustment is incorrect when the height is too high. It includes. When the height adjustment is done incorrectly, the operating harmonic amplitude differs from the reference 10. The greatest differences between harmonic amplitudes are between first-order and conversion ratios. It occurs in the levels between the levels of value. The first level and first order and conversion, excluding the order of magnitude in the conversion rate value. the working harmonic amplitude of the orders between the ratio value The sum of the first amplitudes is obtained by summing the values. For example, cycle 15 When the ratio is 15, the working harmonic amplitudes of the 2nd to 14th order are summed. The sum of the first amplitudes is obtained. Similarly, the sum of the second amplitudes is obtained from the 2nd to the 3rd. It is obtained by summing the amplitudes of the 14th-order reference harmonics. Even with a millimeter error in height adjustment, the second amplitude of the first amplitude sum remains the same. The ratio of the amplitude to the total amplitude is 3 or more. Obtained using multiple data points. 20 This is achieved by using the sum of the first and second amplitudes. a wrong decision that may arise as a result of momentary erroneous measurements caused by sensor (7) This is being prevented. In one application of the invention, the control method detects that the height adjustment was made incorrectly. After the identification step, an audible and / or visual alert is sent to the user. This includes the step. This ensures that the user does not make a mistake in adjusting the height. They are provided with information on the subject. In another version of the invention, A warning appears on the user's mobile device indicating that the height setting is incorrect. is sent. In this way, even if the user is not next to the washing machine (1), 30 They are informed that the height adjustment was done incorrectly. 11 In one application of the invention, the height adjustment control method is on the boiler (4). It is used in the washing machine (1) which contains the installed sensor (7). Figure 1 and In picture 2, the sensor (7) placed on the boiler (4) is seen. The sensor (7) is directly By positioning it on the drum (4), the vibrations of the washing machine (1) are minimized. the vibrations of the boiler (4) in which the drum (6) is located, which is the major source direct measurement is ensured. When the sensor (7) is placed on the boiler (4), Since component vibrations can be isolated, order analysis yields highly efficient results. It provides. In one application of the invention, the height adjustment control method is based on the foot (3). It is used in the washing machine (1) which contains the installed sensor (7). Height When the adjustment is made incorrectly and the drum (6) is rotated at the test rotation speed, the foot (3) Vibrations occur on it. As can be seen in Figure 3, the sensor (7) By placing it on foot (3), the vibrations on foot (3) are directly 15 Measurement is provided. In one application of the invention, the height adjustment control method is mounted on the body (2). It is used in the washing machine (1) which contains the installed sensor (7). In this way, Direct measurement of vibrations on the body (2) is ensured. 20 Thanks to this invention, errors in height adjustment that are too small to be seen with the naked eye can be detected. even without using an additional component, it was detected effectively and without additional cost. A height adjustment control method is implemented.

Claims

12 REQUESTS 1. A body (2), located under the body (2), resting on a ground, supporting the body (2) a height 5 by adjusting the distance between the body (2) and the ground. at least one foot configured to allow adjustment (3), a body (2) in which the washing process is carried out The boiler (4) is suitable for being rotated inside the boiler (3) by means of a motor (5). by sensing the vibrations of a drum (6), boiler (4) in the time domain at least one a sensor (7) and 10 configured to provide real-time data a washing machine (1) which includes a control unit (8) that regulates the operation suitable for operation, - the drum (5) at a predetermined test rotation speed rotating, - While the drum (5) is rotated at the test rotation speed, the sensor (7) detects 15 frequency by converting the provided real-time data into the frequency domain Generating at least one working acceleration signal in the region, - the working acceleration signal is a pre-generated signal by the manufacturer. comparison with the reference acceleration signal and - generator 20 between the working acceleration signal and the reference acceleration signal in case the difference exceeds a threshold value determined by a predetermined authority Characterized by the steps to determine if the height adjustment was done incorrectly. a height adjustment control method.

2. A first frequency value and a second frequency value higher than the first frequency value. The study obtained by converting the frequency value range to the frequency domain. Determining the amplitude of the acceleration signal, the determined working acceleration signal the frequency between the first and second frequency values ​​of its amplitude a reference acceleration signal predetermined by the manufacturer in the region Determining an amplitude ratio that is the ratio of the amplitude to the magnitude, and setting the amplitude ratio between 3 and 30. When it is determined that the height adjustment is incorrect, it means that the height is greater than what is specified. 13 A control like the one in Claim 1, characterized by the steps involved in determining it. method.

3. The working acceleration signal represents the harmonics (multiples) of the test rotational speed. by dividing it into orders, at least one study provides order-of-order analysis data 5 generation, order of operation analysis data for each test rotational speed harmonic Determining the working harmonic amplitudes for each and the working harmonics at least one of their amplitudes corresponding to its own order, by the manufacturer the ratio of a predetermined reference harmonic amplitude to 5 or more When it is determined that the height is too high, it is determined that the height adjustment was made incorrectly. 10 A control method like the one in Claim 1, characterized by its steps.

4. At least one cycle which is the ratio of the rotational speed of the motor (5) to the rotational speed of the drum (6). determining the ratio value and the conversion ratio value with the first order reference 15 with at least one working harmonic amplitude in the orders between the orders. Claim 3 is characterized by the steps of comparing harmonic amplitudes. a control method like that.

5. The first order of the working harmonic amplitude and the motor (5) rotational speed The order of magnitude of the gear ratio value, which is the ratio of the drum (6) rotation speed to the rotation speed, is 20 a first is determined by summing the amplitudes of the orders between them. obtaining the amplitude sum and the first reference harmonic amplitude the order of magnitude between the order of magnitude and the order of magnitude in the conversion rate value a second amplitude sum is obtained by determining the sum of the amplitudes. and the ratio of the sum of the first amplitudes to the sum of the second amplitudes is 3 or 25 When the height is higher, it is determined that the height adjustment was made incorrectly. A control method like the one in Claim 1, characterized by its steps.

6. After determining that the height adjustment was done incorrectly. 30 characterized by the step of sending an audio and / or visual alert to the user A height adjustment control like in any of the above requests. method. 14 7. Washing machine (1) with sensor (7) placed on drum (4) suitable for use, as in any of the above requirements. method.

8. Washing machine (1) containing sensor (7) placed on foot (3) a control suitable for use as in any of Claims 1 to 6 method.

9. Washing machine (1) with sensor (7) placed on the body (2) 10 a control suitable for use as in any of Claims 1 to 6 method.

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