Vibration detection circuit for fabric treatment device, amplitude control method and device

Abstract

This application discloses a vibration detection circuit, amplitude control method, and device for a fabric processing equipment, belonging to the field of equipment control. The vibration detection circuit for the fabric processing equipment includes a functional device with a first function. This functional device can be directly or indirectly subjected to the vibration of a compressor, and can generate a voltage signal based on the vibration. A signal transmission module is disposed between the voltage output terminal of the functional device and the signal input terminal of a controller, at least for transmitting the voltage signal to the controller. The controller is electrically connected to the control terminal of the functional device and is used to transmit the vibration detection signal to the control terminal of the functional device to control the functional device to be in a state capable of generating a voltage signal. The controller generates compressor vibration information based on the voltage signal. This application embodiment has the technical advantage of eliminating the need for additional sensors and controlling the cost of compressor vibration detection.

Description

Technical Field

[0001] This application relates to the field of equipment control, and more specifically, to a vibration detection circuit, amplitude control method, and equipment for a fabric processing device. Background Technology

[0002] Fabric processing equipment relies on a compressor to heat the internal air. During the operation of the compressor, the compressor will vibrate. If the vibration generated by the compressor resonates with the compressor refrigerant pipeline or the fabric processing equipment, it will lead to an increase in the operating noise of the fabric processing equipment. Therefore, it is necessary to detect the vibration of the compressor in order to avoid resonance.

[0003] Currently, compressor vibration is detected by installing sensors, but this method increases the cost of fabric processing equipment. Summary of the Invention

[0004] This application provides a vibration detection circuit, amplitude control method, and device for a fabric processing equipment, so as to at least solve the technical problem of high cost of detecting compressor vibration.

[0005] According to a first aspect of the embodiments of this application, a vibration detection circuit for a fabric processing device is provided, comprising:

[0006] A functional device having a first function, wherein the functional device can be directly or indirectly subjected to the vibration of the compressor, and the functional device can generate a voltage signal based on the vibration;

[0007] A signal transmission module is disposed between the voltage output terminal of the functional device and the signal input terminal of the controller, and is used at least to transmit the voltage signal to the controller;

[0008] The controller is electrically connected to the control terminal of the functional device and is used to transmit a vibration detection signal to the control terminal of the functional device to control the functional device to be in a state that can generate the voltage signal. The controller generates the vibration information of the compressor based on the voltage signal.

[0009] Among them, the primary function of a functional device is the function of the functional device itself.

[0010] In this embodiment, the functional device can be subjected to the vibration of the compressor and generate a voltage signal, so that when it is necessary to detect the vibration of the compressor, the voltage signal generated by the functional device can be used. At the same time, in addition to detecting the vibration of the compressor, the functional device also has a primary function, which means that the detection of the compressor vibration can be completed by using the functional device, without the need for additional sensors, thus controlling the cost of compressor vibration detection.

[0011] In conjunction with the first aspect, in an optional implementation of the embodiments of this application, the signal transmission module is used to adjust the voltage signal during the transmission of the voltage signal, and the adjustment includes at least one of filtering and amplification.

[0012] By adopting this implementation method, the signal transmission module can adjust at least one of filtering and amplification of the voltage signal, which helps to improve the accuracy of the controller in generating vibration information based on the voltage signal, thereby improving the accuracy of compressor vibration detection.

[0013] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the signal transmission module includes a DC blocking capacitor and an amplifier;

[0014] The first end of the DC blocking capacitor is electrically connected to the voltage output terminal of the functional device, and the second end of the DC blocking capacitor is electrically connected to the positive input terminal of the amplifier.

[0015] The amplifier's inverting input is connected to a resistor that affects the amplifier's amplification factor, and the amplifier's output is electrically connected to the controller's signal input.

[0016] By adopting this implementation method, the signal transmission module can both filter and amplify, which helps to improve the accuracy of the controller in generating vibration information based on the voltage signal, thereby improving the accuracy of compressor vibration detection.

[0017] In conjunction with the first aspect, in an optional implementation of the embodiments of this application, the functional device has a piezoelectric effect to generate the voltage signal using the piezoelectric effect.

[0018] This implementation method enables the functional devices to generate voltage signals that reflect the vibration status of the compressor.

[0019] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the functional device includes a first resistor, a second resistor, a third resistor, a transistor, and a functional device, wherein the functional device has a piezoelectric effect and is capable of realizing the first function;

[0020] The positive terminal of the first resistor is electrically connected to the voltage input terminal, the negative terminal of the first resistor is electrically connected to the positive terminal of the functional device, the negative terminal of the functional device is electrically connected to the collector of the transistor, the base of the transistor is electrically connected to the negative terminal of the third resistor, the positive terminal of the third resistor is electrically connected to the control terminal of the functional device, and the second resistor is connected in parallel between the positive and negative terminals of the functional device as a bias resistor.

[0021] The voltage signal is the voltage of the second resistor.

[0022] By adopting this implementation method, the voltage signal is obtained by acquiring the voltage of the second resistor in the functional device. This does not affect the implementation of the first function, nor does it require the addition of expensive hardware, thus controlling the cost of compressor vibration detection.

[0023] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the vibration detection signal is used to control the transistor to remain in the conducting state.

[0024] When the controller controls the functional device to perform the first function, it transmits a pulse signal to the base of the transistor to make the transistor periodically turn on and off.

[0025] By using this implementation method, the functional device can switch between the first function and the detection voltage signal through different control of the transistor, which is convenient and quick and does not require additional hardware costs.

[0026] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the functional device includes a buzzer, and the first function includes buzzing.

[0027] Using this implementation method, the buzzer is a hardware device used for alarm or reminder in fabric processing equipment. It is an essential piece of hardware for fabric processing equipment. By using the buzzer as a functional device, there is no need to add expensive hardware, thus controlling the vibration detection cost of the compressor.

[0028] According to a second aspect of the embodiments of this application, a compressor amplitude control method is provided, the method comprising:

[0029] Obtain vibration information of the compressor, wherein the vibration information includes the amplitude of the compressor;

[0030] Different vibration suppression strategies are employed depending on the magnitude of the amplitude.

[0031] In this embodiment, different vibration suppression strategies are employed when the amplitude of the vibration information varies, which helps to improve the accuracy of compressor vibration adjustment amplitude.

[0032] In conjunction with the second aspect, in an optional implementation of the embodiments of this application, the fabric processing equipment has a vibration compensation module for suppressing the amplitude of the compressor, and the suppression effect on the amplitude of the compressor varies when the gain coefficient of the vibration compensation module is different.

[0033] The different vibration suppression strategies adopted according to the magnitude of the amplitude include:

[0034] When the amplitude is within a preset first range, the gain coefficient of the vibration compensation module is adjusted;

[0035] When the amplitude is within a preset second range, the operating frequency of the compressor is adjusted;

[0036] The first interval is smaller than the second interval.

[0037] By adopting this implementation method, the gain coefficient is adjusted when the amplitude is small, and the operating frequency is adjusted when the amplitude is large, which helps to improve the vibration suppression efficiency.

[0038] In conjunction with the second aspect, in an optional implementation of this application embodiment, adjusting the gain coefficient of the vibration compensation module when the amplitude is within a preset first interval includes:

[0039] The adjusted gain coefficient is obtained by performing calculations using the amplitude and preset coefficients.

[0040] By adopting this implementation method, the gain coefficient is obtained through actual amplitude calculation, so that the adjusted gain coefficient is more in line with the actual vibration of the compressor, which is conducive to improving vibration suppression efficiency.

[0041] In conjunction with the second aspect, in an optional implementation of the embodiments of this application, adjusting the operating frequency of the compressor when the amplitude is within a preset second interval includes:

[0042] Increase the operating frequency of the compressor by a fixed value or multiple.

[0043] This implementation method helps to improve vibration suppression efficiency.

[0044] In conjunction with the second aspect, in one optional implementation of the embodiments of this application, obtaining the vibration information of the compressor includes:

[0045] After performing analog-to-digital conversion on the voltage signal, at least one of normalization, low-pass filtering, and root mean square value calculation is performed to obtain the vibration information.

[0046] This implementation method helps to improve the standardization of vibration information, thereby making the vibration suppression strategy used subsequently more closely match the actual vibration situation of the compressor.

[0047] According to a third aspect of the embodiments of this application, a fabric processing device is provided, including the compressor vibration detection circuit described above or applying the compressor amplitude control method described above.

[0048] In conjunction with the third aspect, in one optional implementation of the embodiments of this application, the fabric processing equipment includes a clothes dryer.

[0049] The technical effects achieved by the third aspect are similar to those achieved by the corresponding technical means in the first and second aspects, and will not be elaborated further here. Attached Figure Description

[0050] Figure 1 This is a structural block diagram of a vibration detection circuit for a fabric processing device provided in an embodiment of this application;

[0051] Figure 2 This is a circuit diagram of a vibration detection circuit for a fabric processing device provided in an embodiment of this application;

[0052] Figure 3 This is a schematic diagram of the structure of a fabric processing device provided in an embodiment of this application;

[0053] Figure 4 This is a flowchart of a compressor amplitude control method provided in an embodiment of this application.

[0054] Labeling descriptions: 1. Drying module; 2. Function knob; 3. Display module; 4. Buzzer; 5. Refrigerant piping; 6. Door cover; 7. Compressor. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0056] It should be understood that "multiple" as mentioned herein refers to two or more. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. In addition, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first," "second," etc., are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and the terms "first," "second," etc., do not necessarily imply that they are different.

[0057] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0058] Heat pump dryers use an inverter compressor to heat the air inside the dryer, causing the moisture in the clothes to evaporate. The heat pump then separates the moisture from the humid air and recovers the heat. Compared to traditional fixed-frequency compressors, inverter compressors can adjust the drying temperature by changing the operating frequency, achieving better drying results.

[0059] However, resonance occurs when the compressor's operating frequency is close to the natural frequency of the compressor's refrigerant lines or the entire machine, increasing the dryer's operating noise and shortening the lifespan of the refrigerant lines. Currently, compressor vibration data is obtained through sensors to adjust the compressor's operating frequency and reduce resonance. However, installing additional vibration sensors to detect compressor vibration is prohibitively expensive for cost-sensitive products like home appliances.

[0060] Based on this, embodiments of this application provide a vibration detection circuit, amplitude control method, and device for fabric treatment equipment. Taking the application of this vibration detection circuit, amplitude control method, and device for fabric treatment equipment in a clothes dryer as an example, it at least solves the following problem:

[0061] 1. When the inverter compressor of a dryer operates at a certain frequency, it may resonate with the compressor refrigerant pipeline or the whole machine, which increases operating noise and shortens the life of the refrigerant pipeline;

[0062] 2. Installing vibration sensors to detect compressor resonance will increase additional costs.

[0063] It has at least one of the following effects:

[0064] 1. By adding a vibration compensation module, the vibration of the compressor is reduced, and the gain coefficient of the vibration compensation module is dynamically adjusted by acquiring the vibration amplitude information of the vibration sensor, thereby achieving a better vibration suppression effect.

[0065] 2. By reusing the existing buzzer circuit on the dryer as a vibration sensor module to detect the vibration of the compressor, there is no need to install an additional vibration sensor module, thus reducing production costs.

[0066] It has at least the following characteristics:

[0067] By reusing the existing buzzer circuit on the dryer and utilizing the piezoelectric effect of the piezoelectric crystal in the buzzer, the compressor vibration signal is extracted from the voltage signal generated by the piezoelectric crystal through a signal processing module. This allows for the detection of the magnitude of compressor vibration (or noise) during operation, thereby dynamically adjusting the compressor's control strategy and changing the gain coefficient of the vibration compensation module. This reduces compressor vibration (or noise) and lowers stress on the compressor's refrigerant piping.

[0068] Next, the vibration detection circuit of the fabric processing equipment provided in this application will be further described. (Refer to...) Figure 1 The diagram shows the structural block diagram of the vibration detection circuit of the fabric processing equipment. The vibration detection circuit of the fabric processing equipment includes the following components.

[0069] A functional device having a first function, wherein the functional device can be directly or indirectly subjected to the vibration of the compressor, and the functional device can generate a voltage signal based on the vibration;

[0070] A signal transmission module is disposed between the voltage output terminal of the functional device and the signal input terminal of the controller, and is used at least to transmit the voltage signal to the controller;

[0071] The controller is electrically connected to the control terminal of the functional device and is used to transmit a vibration detection signal to the control terminal of the functional device to control the functional device to be in a state that can generate the voltage signal. The controller generates the vibration information of the compressor based on the voltage signal.

[0072] Among them, the primary function of a functional device is the function of the functional device itself.

[0073] Since the functional components can generate voltage signals based on the compressor's vibration, the compressor's vibration information, such as the vibration amplitude, can be calculated from the voltage signals. After obtaining the compressor's vibration information, the vibration of the compressor can be suppressed based on the vibration characteristics indicated by the vibration information, thus preventing resonance between the compressor and refrigerant piping or fabric handling equipment.

[0074] Among them, the functional device can be any hardware in the fabric processing equipment that has a first function, as long as the functional device can generate a voltage signal that characterizes the vibration of the compressor. For example, the functional device is a buzzer. The function of the buzzer itself is to make a sound, so the first function is to make a sound, that is, to make an alarm or prompt function. At the same time, due to the setting of the signal transmission module and the controller, the buzzer has a second function, that is, to detect the vibration of the compressor.

[0075] Specifically, to enable the functional device to be directly or indirectly subjected to the vibration of the compressor, the functional device can be installed within the space where the compressor is located. When the compressor vibrates, the vibration is transmitted to the functional device through a medium. Alternatively, the functional device can be directly in contact with the compressor, or other structures such as rods or blocks capable of transmitting vibration can be used to connect the functional device and the compressor. This embodiment does not specifically limit how the compressor's vibration is directly or indirectly transmitted to the functional device. It should be noted that in one application scenario, a device with a primary function that can also be directly or indirectly subjected to the vibration of the compressor can be found within the fabric processing equipment. This eliminates the need to adjust the position of the functional device or add structures such as rods or blocks to the fabric processing equipment to transmit vibration.

[0076] Among them, the ability of functional devices to generate voltage signals based on vibration can be achieved through the piezoelectric effect.

[0077] The vibration detection signal transmitted by the controller to the functional device can be a pulse signal or other control signals. This embodiment does not specifically limit this, as long as it enables the functional device to generate a voltage signal. In this state, the functional device may or may not perform the first function, depending on the specific structure of the functional device, which is not limited in this embodiment. Preferably, when detecting compressor vibration, the functional device cannot perform the first function to reduce interference and improve the accuracy of the voltage signal.

[0078] In this embodiment, the functional device can be subjected to the vibration of the compressor and generate a voltage signal, so that when it is necessary to detect the vibration of the compressor, the voltage signal generated by the functional device can be used. At the same time, in addition to detecting the vibration of the compressor, the functional device also has a primary function, which means that the detection of the compressor vibration can be completed by using the functional device, without the need for additional sensors, thus controlling the cost of compressor vibration detection.

[0079] In one possible embodiment of this application, the signal transmission module is used to adjust the voltage signal during the transmission of the voltage signal, the adjustment including at least one of filtering and amplification.

[0080] Filtering improves the accuracy of voltage signal feedback on compressor vibration, while amplification reduces the processing difficulty of the voltage signal for the controller. Specifically, filtering and amplification circuits can be incorporated into the signal transmission module to achieve both filtering and amplification of the voltage signal.

[0081] In this embodiment, the signal transmission module can adjust at least one of filtering and amplification of the voltage signal, which helps to improve the accuracy of the controller in generating vibration information based on the voltage signal, thereby improving the accuracy of compressor vibration detection.

[0082] Optionally, in one implementation of this embodiment, such as Figure 2 As shown, the signal transmission module includes a DC blocking capacitor and an amplifier;

[0083] The first end of the DC blocking capacitor is electrically connected to the voltage output terminal of the functional device, and the second end of the DC blocking capacitor is electrically connected to the positive input terminal of the amplifier.

[0084] The amplifier's inverting input is connected to a resistor that affects the amplifier's amplification factor, and the amplifier's output is electrically connected to the controller's signal input.

[0085] Specifically, a grounded diode D1 is electrically connected between the first terminal of the DC blocking capacitor C1 and the voltage output terminal of the functional device. The positive terminal of the diode D1 is grounded, and the negative terminal is connected between the first terminal of the DC blocking capacitor C1 and the voltage output terminal of the functional device. The diode D1 plays a voltage stabilizing role to prevent the controller from being damaged by excessively high voltage signals.

[0086] The DC blocking capacitor C1 filters out the DC voltage in the voltage signal, retaining the resonant AC voltage. The amplification factor of amplifier OP is adjusted by resistors R4 and R5. Specifically, resistor R4 is connected between the inverting input and output terminals of amplifier OP, and resistor R5 is connected in parallel with R4 at the inverting input terminal of amplifier OP and grounded. Resistors R4 and R5 can be variable resistors.

[0087] By adopting this implementation method, the signal transmission module can both filter and amplify, which helps to improve the accuracy of the controller in generating vibration information based on the voltage signal, thereby improving the accuracy of compressor vibration detection.

[0088] Optionally, in one implementation of this embodiment, the functional device has a piezoelectric effect to generate the voltage signal using the piezoelectric effect.

[0089] Specifically, the functional devices are piezoelectric materials, which have both inverse and direct piezoelectric effects. Piezoelectric materials include quartz and piezoelectric ceramics.

[0090] This implementation method enables the functional devices to generate voltage signals that reflect the vibration status of the compressor.

[0091] Optionally, in one implementation of this embodiment, the functional device includes a first resistor R1, a second resistor R2, a third resistor R3, a transistor Q1, and a functional device Buzz1, wherein the functional device Buzz1 has a piezoelectric effect and can realize the first function.

[0092] The positive terminal of the first resistor R1 is electrically connected to the voltage input terminal, the negative terminal of the first resistor R1 is electrically connected to the positive terminal of the functional device Buzz1, the negative terminal of the functional device Buzz1 is electrically connected to the collector of the transistor Q1, the base of the transistor Q1 is electrically connected to the negative terminal of the third resistor R3, the positive terminal of the third resistor R3 is electrically connected to the control terminal of the functional device, and the second resistor R2 is connected in parallel between the positive and negative terminals of the functional device Buzz1 as a bias resistor.

[0093] The voltage signal is the voltage of the second resistor R2.

[0094] When the functional device is required to perform the first function, a square wave signal is transmitted to the base of transistor Q1 to control transistor Q1 to periodically turn on and off; when the functional device is required to detect compressor vibration, a high level is transmitted to the base of transistor Q1 to control transistor Q1 to remain on.

[0095] As can be seen, by outputting different pulse signals by the controller, the functional device switches between the first function and the compressor vibration detection function.

[0096] When transistor Q1 is always on, the voltage across bias resistor R2 includes the DC bias voltage U1 of power supply VCC and the AC voltage Uac generated by compressor vibration. After the voltage across bias resistor R2 is collected, it is filtered out by DC filtering through DC blocking capacitor C1.

[0097] By adopting this implementation method, the voltage signal is obtained by acquiring the voltage of the second resistor in the functional device. This does not affect the implementation of the first function, nor does it require the addition of expensive hardware, thus controlling the cost of compressor vibration detection.

[0098] Optionally, in one implementation of this embodiment, the vibration detection signal is used to control the transistor to remain in the on state.

[0099] When the controller controls the functional device to perform the first function, it transmits a pulse signal to the base of the transistor to make the transistor periodically turn on and off.

[0100] By using this implementation method, the functional device can switch between the first function and the detection voltage signal through different control of the transistor, which is convenient and quick and does not require additional hardware costs.

[0101] Optionally, in one implementation of this embodiment, the functional device includes a buzzer, and the first function includes buzzing.

[0102] Using this implementation method, the buzzer is a hardware device used for alarm or reminder in fabric processing equipment. It is an essential piece of hardware for fabric processing equipment. By using the buzzer as a functional device, there is no need to add expensive hardware, thus controlling the vibration detection cost of the compressor.

[0103] A second aspect of this application provides a compressor amplitude control method, the method comprising:

[0104] Obtain vibration information of the compressor, wherein the vibration information includes the amplitude of the compressor;

[0105] Different vibration suppression strategies are employed depending on the magnitude of the amplitude.

[0106] The larger the amplitude, the greater the vibration suppression amplitude and / or efficiency of the vibration suppression strategy. Specifically, there are various ways to suppress compressor amplitude, such as adjusting the compressor's operating frequency or activating a vibration compensation module that can suppress compression amplitude. This embodiment does not limit the specific method of vibration suppression.

[0107] In this embodiment, different vibration suppression strategies are employed when the amplitude of the vibration information varies, which helps to improve the accuracy of compressor vibration adjustment amplitude.

[0108] Optionally, in one implementation of this embodiment, the fabric processing equipment has a vibration compensation module for suppressing compressor amplitude. The suppression effect on compressor amplitude varies depending on the gain coefficient of the vibration compensation module.

[0109] The different vibration suppression strategies adopted according to the magnitude of the amplitude include:

[0110] When the amplitude is within a preset first range, the gain coefficient of the vibration compensation module is adjusted;

[0111] When the amplitude is within a preset second range, the operating frequency of the compressor is adjusted;

[0112] The first interval is smaller than the second interval.

[0113] By adopting this implementation method, the gain coefficient is adjusted when the amplitude is small, and the operating frequency is adjusted when the amplitude is large, which helps to improve the vibration suppression efficiency.

[0114] Optionally, in one implementation of this embodiment, adjusting the gain coefficient of the vibration compensation module when the amplitude is within a preset first interval includes:

[0115] The adjusted gain coefficient is obtained by performing calculations using the amplitude and preset coefficients.

[0116] By adopting this implementation method, the gain coefficient is obtained through actual amplitude calculation, so that the adjusted gain coefficient is more in line with the actual vibration of the compressor, which is conducive to improving vibration suppression efficiency.

[0117] Optionally, in one implementation of this embodiment, adjusting the operating frequency of the compressor when the amplitude is within a preset second interval includes:

[0118] Increase the operating frequency of the compressor by a fixed value or multiple.

[0119] This implementation method helps to improve vibration suppression efficiency.

[0120] Optionally, in one implementation of this embodiment, obtaining the compressor's vibration information includes:

[0121] After performing analog-to-digital conversion on the voltage signal, at least one of normalization, low-pass filtering, and root mean square value calculation is performed to obtain the vibration information.

[0122] This implementation method helps to improve the standardization of vibration information, thereby making the vibration suppression strategy used subsequently more closely match the actual vibration situation of the compressor.

[0123] A third aspect of this application provides a fabric processing device, including the compressor vibration detection circuit described above or using the compressor amplitude control method described above.

[0124] In one optional implementation of this application, the fabric processing equipment includes a clothes dryer.

[0125] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0126] In one specific implementation of the embodiments of this application, a clothes dryer is taken as an example, such as Figure 3As shown, the dryer includes a function selection knob, a drying module, a display panel, refrigerant piping, a door cover, and a compressor. The buzzer module is mounted on the display panel. When the dryer is working, the compressor compresses the refrigerant, which enters the drying module through the refrigerant piping. In the condenser, the refrigerant releases heat to heat the air inside the dryer, and in the evaporator, it recovers the heat from the humid air, causing the moisture to condense and thus drying the clothes.

[0127] Variable frequency compressors can change their operating frequency and adjust the drying temperature to adapt to different drying stages or clothing materials, achieving better drying results. The higher the compressor's operating frequency, the higher the drying temperature, and the faster the clothes dry. Therefore, the compressor's operating frequency needs to be adjusted according to the drying program during the drying process. Within a single working cycle, the different torques of the intake and exhaust gases cause compressor vibration. When the compressor's vibration frequency is close to the natural frequency of the compressor's refrigerant lines or the entire unit, resonance occurs. This effect is more pronounced at low frequencies, resulting in significant vibration and noise, shortening the lifespan of the refrigerant lines, and impacting the user experience. Adding a vibration compensation module to the compressor control system can effectively reduce low-frequency compressor vibration. The magnitude of the compensation gain directly affects the vibration suppression effect. If the magnitude of the compressor's vibration can be directly detected, the compensation gain can be adjusted more precisely, thereby achieving better vibration suppression.

[0128] To more accurately detect compressor vibration, a vibration sensor is typically required. However, this necessitates additional circuitry, which is costly and difficult to implement in cost-sensitive products like home appliances. Therefore, this embodiment proposes a method to utilize the existing buzzer circuit on a clothes dryer and extend it into a vibration detection circuit. Without adding an additional sensor, this method can extract the amplitude and frequency of the compressor's vibration signal from the buzzer circuit.

[0129] like Figure 2As shown, the solid line represents the original buzzer circuit. When the buzzer is working, the I / O port of the microcontroller (MCU) controls the conduction and cutoff of transistor Q1, causing buzzer Buzz1 to sound. The frequency of the sound is controlled by the square wave frequency emitted from the I / O pin. VCC is the power supply for the buzzer, R1 and R3 are current-limiting resistors, and R2 is a bias resistor. The dashed line represents the vibration sensor circuit. The buzzer's sound-generating unit is made of piezoelectric material. Its principle is based on the inverse piezoelectric effect; the material deforms when subjected to alternating voltage, thus generating vibration. Similarly, the piezoelectric material in the buzzer's sound-generating unit also exhibits the direct piezoelectric effect, meaning that external vibrations acting on the material generate a voltage signal. Utilizing this characteristic of the buzzer, it can be extended into a vibration sensor to detect the vibration of a dryer compressor. The analog-to-digital converter (ADC) on the microcontroller (MCU) detects the voltage signal generated by the buzzer's piezoelectric crystal. When the buzzer is used as a vibration sensor, the I / O output is high, transistor Q1 is always on, and the voltage across resistor R2 is equal to the DC bias voltage U1 of the power supply VCC across R2 plus the AC voltage Uac generated by the vibration of the buzzer. The voltage signal passes through a Zener diode D1, which prevents the generated voltage from being too high and damaging the microcontroller IC. Then, a DC blocking capacitor C1 removes the DC bias voltage U1, leaving only the vibration AC voltage signal Uac to be input to the operational amplifier OP. The amplification factor is adjusted by resistors R4 and R5, and the weak vibration AC voltage signal is amplified and then transmitted to the analog-to-digital converter (ADC) of the microcontroller (MCU) for sampling.

[0130] The sampled digital signal is processed by the signal processing module to obtain the compressor's vibration information. The signal processing procedure is as follows: Figure 4As shown, the sampling signal is first normalized to normalize the numerical value of the sampling result of the analog-to-digital converter (ADC) to the range of [0, 1] for convenient subsequent processing. Then it is input into the low-pass filtering module to filter out the high-frequency interference signals in the signal. The calculation formula for low-pass filtering is "y(t)=y(t - 1)+alpha[x(t)-y(t - 1)]", where y(t) is the filtered signal, y(t - 1) is the previous value of the filtered signal, x(t) is the current input signal, and alpha is the filtering coefficient, which is calculated from the cut-off frequency and the sampling period, and "alpha=(2*π*fc*Ts) / (2*π*fc*Ts + 1)", where fc is the cut-off frequency with a value range of 100Hz - 150Hz, and Ts is the sampling period around 2kHz - 5kHz. The signal after low-pass filtering is input into the root mean square (RMS) calculation module to calculate the root mean square value of the filtered signal "RMS = sqrt{(1 / n)*sum[x(t)^2]}", where x(t) is the input signal and n is the number of signals in one calculation period, and n is around 800 - 1000. The amplitude of the compressor is calculated based on the calculated root mean square value to adjust the control strategy of vibration compensation. The correspondence between the root mean square value and the amplitude size is as follows: if RMS < V1, it means the vibration amplitude is small, and the current compensation coefficient gain is maintained. If V1 < RMS < V2, the gain coefficient of vibration compensation is adjusted according to the current amplitude size. The calculation method of the compensation coefficient beta is as follows: beta = RMS*K1 + K2, where K1 (K1 = 0.86 - 0.94) and K2 (K2 = 0.07 - 0.21) are fixed coefficients, and the value of the compensation coefficient beta does not exceed 1. If RMS > V2, it means the current vibration amplitude is too high. First, the operating frequency of the current compressor will be increased to reduce the compressor vibration, and then the operating frequency will be tried to be reduced, with each increase in the operating frequency being 5Hz, where V1 = 0.25 - 0.35 and V2 = 0.45 - 0.55.

[0131] The serial numbers of the embodiments of this application or the order of introduction are only for description and do not represent the superiority or inferiority of the embodiments.

[0132] In the several embodiments provided by this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of units or modules can be in electrical or other forms.

[0133] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0134] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0135] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital versatile disc (DVD)), or a semiconductor medium (e.g., solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiments of this application can be a non-volatile storage medium; in other words, it can be a non-transient storage medium.

[0136] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the scene data of the current frame in the 3D virtual scene involved in the embodiments of this application, the client's device information, and the scene interaction information are all obtained with full authorization.

[0137] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A vibration detection circuit for a fabric processing device, characterized in that, include: A functional device having a first function of vibrating under alternating current and a second function of generating a voltage signal in response to the vibration of the fabric processing equipment; A signal transmission module is disposed between the voltage output terminal of the functional device and the signal input terminal of the controller, and is used at least to transmit the voltage signal to the controller when the functional device performs the second function; A controller is used to control the functional device to switch between the first function and the second function, and to acquire the voltage signal, which represents the vibration amplitude of the fabric processing equipment; The fabric processing equipment has a vibration compensation module for suppressing the vibration amplitude of the compressor. The vibration compensation module has different suppression effects on the vibration amplitude of the compressor when the gain coefficient is different. The controller is further configured to: determine a vibration suppression strategy based on the vibration amplitude, the vibration suppression strategy being related to the vibration strength represented by the vibration amplitude; the determination of the vibration suppression strategy based on the vibration amplitude includes: adjusting the gain coefficient of the vibration compensation module when the vibration amplitude is in a preset first interval; adjusting the operating frequency of the compressor when the vibration amplitude is in a preset second interval; wherein the first interval is smaller than the second interval.

2. The vibration detection circuit of the fabric processing equipment according to claim 1, characterized in that, The signal transmission module is used to adjust the voltage signal during the transmission of the voltage signal, and the adjustment includes at least one of filtering and amplification.

3. The vibration detection circuit of the fabric processing equipment according to claim 2, characterized in that, The signal transmission module includes a DC blocking capacitor and an amplifier; The first end of the DC blocking capacitor is electrically connected to the voltage output terminal of the functional device, and the second end of the DC blocking capacitor is electrically connected to the positive input terminal of the amplifier. The amplifier's inverting input is connected to a resistor that affects the amplifier's amplification factor, and the amplifier's output is electrically connected to the controller's signal input.

4. The vibration detection circuit of the fabric processing equipment according to claim 1, characterized in that, The functional device has a piezoelectric effect to generate the voltage signal.

5. The vibration detection circuit of the fabric processing equipment according to claim 4, characterized in that, The vibration detection circuit also includes a power supply circuit for the functional device and a switching circuit for the functional device, wherein the switching circuit is used to control the conduction mode of the power supply circuit; The conduction method includes continuous conduction for generating the voltage signal and intermittent conduction for achieving the first function.

6. The vibration detection circuit of the fabric processing equipment according to claim 5, characterized in that, The switching circuit has a control signal input terminal electrically connected to the controller. The control signal of the controller includes a first control signal that causes the switching circuit to conduct intermittently and a second control signal that causes the switching circuit to conduct continuously.

7. The vibration detection circuit of the fabric processing equipment according to claim 5, characterized in that, The power supply circuit includes a first resistor and a second resistor, the switching circuit is a transistor circuit, and the switching circuit includes a third resistor, a transistor, and functional devices. The positive terminal of the first resistor is electrically connected to the voltage input terminal, the negative terminal of the first resistor is electrically connected to the positive terminal of the functional device, the negative terminal of the functional device is electrically connected to the collector of the transistor, the base of the transistor is electrically connected to the negative terminal of the third resistor, the positive terminal of the third resistor is electrically connected to the control terminal of the functional device, and the second resistor is connected in parallel between the positive and negative terminals of the functional device as a bias resistor. The voltage signal is the voltage of the second resistor.

8. The vibration detection circuit of the fabric processing equipment according to any one of claims 1-7, characterized in that, The functional device includes a buzzer, and the first function includes buzzing.

9. A method for controlling the amplitude of a compressor, characterized in that, The method includes: The vibration amplitude of the fabric processing equipment is obtained based on the detection circuit of any one of claims 1-8; A vibration suppression strategy is determined based on the vibration amplitude, and the vibration suppression strategy is related to the intensity of the vibration represented by the vibration amplitude.

10. The compressor amplitude control method according to claim 9, characterized in that, The fabric processing equipment has a vibration compensation module for suppressing the vibration amplitude of the compressor. The vibration compensation module has different suppression effects on the vibration amplitude of the compressor when the gain coefficient is different. The step of determining the vibration suppression strategy based on the vibration amplitude includes: When the vibration amplitude is within a preset first range, the gain coefficient of the vibration compensation module is adjusted; When the vibration amplitude is within a preset second range, the operating frequency of the compressor is adjusted; The first interval is smaller than the second interval.

11. The compressor amplitude control method according to claim 10, characterized in that, When the vibration amplitude is within a preset first range, adjusting the gain coefficient of the vibration compensation module includes: The adjusted gain coefficient is obtained by calculating the vibration amplitude and a preset coefficient.

12. The compressor amplitude control method according to claim 10, characterized in that, When the vibration amplitude is within a preset second range, adjusting the operating frequency of the compressor includes: Increase the operating frequency of the compressor by a fixed value or multiple.

13. The compressor amplitude control method according to claim 9, characterized in that, The acquisition of the vibration amplitude of the fabric processing equipment includes: After performing analog-to-digital conversion on the voltage signal, normalization, low-pass filtering, and root mean square value calculation are performed to obtain the vibration amplitude.

14. A fabric treatment device, characterized in that, The vibration detection circuit includes any one of claims 1-8, or the compressor amplitude control method according to any one of claims 9-13 is applied.

15. The fabric processing equipment according to claim 14, characterized in that, The fabric processing equipment includes a clothes dryer.

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