Laundry treating apparatus and control method thereof, storage medium

Abstract

The application provides a clothes processing device and a control method thereof and a storage medium. The method comprises the following steps: obtaining an operation parameter of the clothes processing device, the operation parameter being capable of representing a load size of a compressor; determining a limited frequency current corresponding to the operation parameter; and adjusting an operation frequency of the compressor based on the limited frequency current. The limited frequency current determined based on the operation parameter can be adapted to the load size of the compressor. The operation frequency of the compressor is adjusted based on the limited frequency current, which can effectively reduce the situation that the load of the compressor is too large, effectively adjust the temperature, and reduce the situation that the machine is stopped due to the too large load of the compressor or the too high temperature, thereby shortening the total time length of the drying program and improving the drying efficiency. Moreover, the situation that the components on the variable frequency driving board of the compressor are triggered to stop due to the too high temperature can be reduced, and the stability and reliability of the operation of the clothes processing device are improved.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, specifically relating to a clothing processing device and its control method and storage medium. Background Technology

[0002] Inverter heat pump clothes dryers or washer-dryer combos and other inverter heat pump clothing processing equipment can control the hot air temperature and heat recovery by adjusting the operating frequency of the compressor.

[0003] During the drying process of a variable frequency heat pump clothing processing device, the compressor's operating frequency increases as the program progresses, and the temperature of the heat pump system also rises continuously. When the temperature exceeds a threshold, a shutdown is triggered to prevent damage to the equipment due to overheating. However, the shutdown interrupts program execution, extending the total program duration.

[0004] In variable frequency heat pump clothing processing equipment, the relevant technology monitors the compressor current during operation and controls the compressor to maintain the current operating frequency when the current reaches a set value. However, this adjustment keeps the compressor frequency at a fixed frequency until the program ends. Even if the system temperature drops, the compressor operating frequency will not be increased again. This adjustment method is not flexible enough and will prolong the total program duration. Summary of the Invention

[0005] Addressing the technical problem of inflexible compressor frequency adjustment methods in related technologies, this application proposes a garment processing device, its control method, and a storage medium to improve the flexibility of adjusting the compressor operating frequency, reduce compressor shutdowns during the drying process, shorten drying time, and improve drying efficiency.

[0006] A first aspect of this application provides a control method for a garment processing device, the method comprising:

[0007] Obtain the operating parameters of the garment processing equipment, wherein the operating parameters can characterize the load of the compressor;

[0008] Determine the frequency limiting current corresponding to the operating parameters;

[0009] The operating frequency of the compressor is adjusted based on the frequency-limiting current.

[0010] In some embodiments of this application, determining the frequency-limiting current corresponding to the operating parameters includes:

[0011] Determine the value range to which the operating parameter belongs;

[0012] Obtain the frequency-limiting current corresponding to the value range.

[0013] In some embodiments of this application, adjusting the operating frequency of the compressor based on the frequency-limiting current includes:

[0014] Based on the frequency-limiting current, multiple current thresholds are obtained, and each current threshold is used to trigger different adjustment operations on the operating frequency of the compressor.

[0015] Detect the operating current of the compressor;

[0016] The operating frequency of the compressor is adjusted based on the operating current, the frequency limiting current, and the multiple current thresholds.

[0017] In some embodiments of this application, obtaining multiple current thresholds based on the frequency-limiting current includes:

[0018] From the preset mapping relationship between frequency-limiting current and current threshold, obtain the second current threshold and at least one first current threshold corresponding to the frequency-limiting current;

[0019] The first current threshold is used to trigger the compressor to operate at a frequency increase rate lower than the preset normal frequency increase rate, and different first current thresholds correspond to different frequency increase rates; the second current threshold is used to trigger a shutdown operation.

[0020] In some embodiments of this application, obtaining multiple current thresholds based on the frequency-limiting current includes:

[0021] Based on the frequency limiting current and the preset step size value, at least one first current threshold is determined. The first current threshold is used to trigger the compressor to operate at a frequency increase rate that is less than the preset normal frequency increase rate. Different first current thresholds correspond to different frequency increase rates.

[0022] The preset shutdown current corresponding to the frequency limiting current is obtained as the second current threshold, and the second current threshold is used to trigger the shutdown operation.

[0023] In some embodiments of this application, determining at least one first current threshold based on the frequency-limiting current and a preset step size value includes:

[0024] Based on the frequency-limiting current and the preset step size value, a plurality of first current thresholds are determined;

[0025] The plurality of first current thresholds are arranged in order of magnitude, and the difference between two adjacent first current thresholds is the preset step size value.

[0026] In some embodiments of this application, adjusting the operating frequency of the compressor based on the operating current, the frequency-limiting current, and the plurality of current thresholds includes:

[0027] Based on the operating current of the compressor, determine the current change stage to which the operating current belongs, and the current change stage includes a current rising stage or a current falling stage;

[0028] The operating frequency of the compressor is adjusted based on the compressor's current operating current, the current change stage, the frequency limiting current, and the multiple current thresholds.

[0029] In some embodiments of this application, adjusting the operating frequency of the compressor based on the compressor's current operating current, the current change phase, the frequency-limiting current, and the plurality of current thresholds includes:

[0030] The current change phase is defined as the current rise phase;

[0031] Based on the current operating current reaching the frequency limiting current, the compressor is controlled to operate at the current operating frequency;

[0032] If the current operating current reaches any one of the multiple current thresholds, perform the adjustment operation corresponding to that current threshold.

[0033] In some embodiments of this application, the step of performing an adjustment operation corresponding to any one of the plurality of current thresholds based on the current operating current reaching any one of the multiple current thresholds includes:

[0034] Based on the current operating current reaching a first current threshold among the plurality of current thresholds, a target boost rate corresponding to the first current threshold is obtained, and the compressor is controlled to operate at the target boost rate; the target boost rate is less than the current boost rate of the compressor;

[0035] The compressor is controlled to stop based on the current operating current reaching a second current threshold among the plurality of current thresholds.

[0036] In some embodiments of this application, adjusting the operating frequency of the compressor based on the compressor's current operating current, the current change phase, the frequency-limiting current, and the plurality of current thresholds includes:

[0037] The current change phase is defined as the current decrease phase;

[0038] Based on the fact that the current operating current is less than the smallest current threshold among the plurality of current thresholds, the compressor is controlled to operate at a preset normal frequency ramp rate;

[0039] Based on the fact that the current operating current is greater than or equal to the minimum current threshold, the compressor is controlled to operate at the current operating frequency.

[0040] In some embodiments of this application, the operating parameters include at least one of the following: the compressor's exhaust temperature, exhaust pressure, condenser temperature, the inlet air temperature of the clothes processing drum, and the outlet air temperature.

[0041] An embodiment of the second aspect of this application provides a garment processing device, including: a controller and a compressor;

[0042] The controller is configured to perform the method described in the first aspect above to adjust the operating frequency of the compressor.

[0043] An embodiment of the third aspect of this application provides a garment processing device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect above.

[0044] An embodiment of the fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, the program being executed by a processor to implement the method described in the first aspect above.

[0045] The technical solutions provided in this application embodiment have at least the following technical effects or advantages:

[0046] In this embodiment, the frequency-limiting current determined based on operating parameters can adapt to the compressor's load. Adjusting the compressor's operating frequency based on this frequency-limiting current can effectively reduce the occurrence of excessive compressor load and effectively regulate the temperature, reducing shutdowns due to excessive compressor load or temperature. This shortens the total drying time and improves drying efficiency. Furthermore, it reduces the likelihood of components on the compressor's inverter drive board overheating and triggering shutdowns, thus improving the stability and reliability of the garment processing equipment.

[0047] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0049] In the attached diagram:

[0050] Figure 1 A flowchart illustrating a control method for a garment processing device provided in some embodiments of this application is shown;

[0051] Figure 2 A schematic diagram illustrating the principle of adjusting the compressor operating frequency provided in some embodiments of this application is shown;

[0052] Figure 3 This application shows a schematic flowchart of a control method for a garment processing device provided in some embodiments;

[0053] Figure 4 The present application provides a schematic diagram of the structure of a garment processing device according to some embodiments;

[0054] Figure 5 A schematic diagram of a storage medium provided in some embodiments of this application is shown. Detailed Implementation

[0055] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0056] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0057] In the embodiments of this application, the garment processing equipment has a variable frequency heat pump system. The heat pump system includes a compressor, a condenser, and an evaporator. The compressor is connected to the condenser and evaporator via pipelines, forming a circulating flow path for refrigerant within these pipelines. During the drying process of the garment processing equipment, the circulating air path within the equipment is combined with the aforementioned refrigerant circulating flow path, allowing the circulating air to exchange heat with the refrigerant. This heats the air entering the garment processing drum, generating hot air. As the hot air passes through the drum, it exchanges heat with the load to be dried, achieving the effect of drying the load.

[0058] In variable frequency heat pump systems for garment processing, the compressor's operating frequency is adjustable. By adjusting the compressor's frequency, the temperature is regulated, ensuring the drying process remains within the desired temperature range. In related technologies, as the drying program executes, the compressor's operating frequency increases, and the heat pump system's temperature also rises. When the temperature exceeds a threshold, a shutdown is triggered to prevent damage from overheating. However, this shutdown interrupts program execution, extending the total program duration.

[0059] To reduce shutdowns due to overheating during the drying process, related technologies monitor the compressor current during operation. When the current reaches a set value, the compressor is controlled to maintain its current operating frequency. A higher compressor operating frequency results in a higher motor speed, leading to a greater heating capacity from the heat pump system and consequently higher temperatures in the clothes drying drum and the entire heat pump system. By maintaining the compressor's operating frequency when the current reaches the set value, the technology limits the heat output of the heat pump system, reducing the likelihood of overheating and shutdowns.

[0060] However, the aforementioned technologies maintain the compressor frequency at the current operating frequency and then operate at a fixed frequency until the program ends. This means that even if the temperature drops, the compressor's operating frequency will not be increased again. The adjustment method is not flexible enough, which will prolong the total duration of the drying program and reduce drying efficiency.

[0061] Based on this, embodiments of this application provide a control method for a garment processing device. This method involves acquiring the operating parameters of the garment processing device, which characterize the load on the compressor. A frequency-limiting current corresponding to the operating parameters is determined, and the operating frequency of the compressor is adjusted based on this frequency-limiting current.

[0062] This method determines the corresponding frequency-limiting current based on operating parameters that characterize the compressor load, and then adjusts the compressor's operating frequency based on the frequency-limiting current. This ensures that the compressor's operating frequency adjustment is adapted to the compressor's load, improving the flexibility and accuracy of frequency regulation. This makes the heat pump system less prone to shutdown due to overheating, shortening drying time and improving drying efficiency. Furthermore, by flexibly controlling the compressor's operating frequency, the temperature rise of components in the compressor's frequency converter can also be effectively controlled, reducing the likelihood of shutdowns triggered by overheating components and improving the overall stability and reliability of the system.

[0063] The control method for clothing processing equipment provided in this application is applicable to clothing processing equipment such as dryers and washer-dryer combos with variable frequency compressors. The following detailed description, in conjunction with the accompanying drawings, describes a clothing processing device, its control method, and a storage medium provided in this application.

[0064] Some embodiments of this application propose a control method for a garment processing device; see [link to relevant documentation]. Figure 1 The flowchart shows a control method for a garment processing device. This method can be applied to garment processing devices with variable frequency compressors. The method specifically includes the following steps 101-103.

[0065] Step 101: Obtain the operating parameters of the clothing processing equipment, which can characterize the load of the compressor.

[0066] Step 102: Determine the frequency limiting current corresponding to the operating parameters.

[0067] Step 103: Adjust the compressor's operating frequency based on the frequency-limiting current.

[0068] The executing entity of this application embodiment can be a clothing processing device with a variable frequency compressor, which may include, but is not limited to, a dryer, a washer-dryer combo, etc.

[0069] The above operating parameters can reflect the load of the compressor. The load of the compressor can refer to the amount of work required by the compressor to achieve the temperature required for the drying program. The temperature required for the drying program can be the inlet temperature, outlet temperature, or internal temperature of the clothes processing drum that the drying program requires to be achieved. The temperature required for the drying program may be different at different times during the execution of the drying program.

[0070] Operating parameters reflecting the compressor load include at least one of the following: compressor discharge temperature, discharge pressure, condenser temperature, inlet air temperature of the clothes handling drum, and outlet air temperature. A temperature sensor can be installed on the pipe at the compressor discharge port to detect the discharge temperature. A pressure sensor can be installed on the pipe at the compressor discharge port to detect the discharge pressure. The condenser temperature can be the temperature detected by a temperature sensor installed at any point on the condenser pipe. A temperature sensor can be installed in the inlet air passage of the clothes handling drum to detect the inlet air temperature, and a temperature sensor can be installed in the exhaust air passage of the clothes handling drum to detect the outlet air temperature. In some embodiments, a temperature sensor can also be installed at any position between the compressor discharge port and the condenser outlet; the temperature detected by this temperature sensor can also reflect the compressor load.

[0071] During the drying process of the garment processing equipment, one or more of the above-mentioned operating parameters are acquired, and a corresponding frequency-limiting current is determined based on the acquired operating parameters. The frequency-limiting current characterizes the current that triggers the frequency-limiting operation. In this embodiment, the current can be the compressor current, which can be the current of the compressor's inverter drive board.

[0072] During the operation of the garment processing equipment, the aforementioned operating parameters can be easily and accurately obtained. The frequency-limiting current determined based on these parameters can be adapted to the compressor's load. Adjusting the compressor's operating frequency based on this frequency-limiting current effectively reduces the occurrence of excessive compressor load and temperature regulation, minimizing shutdowns due to overload or overheating. This, in turn, shortens the total drying cycle time and improves drying efficiency. Furthermore, it reduces the likelihood of components on the compressor's inverter drive board overheating and triggering shutdowns, thus enhancing the stability and reliability of the garment processing equipment.

[0073] In some embodiments of this application, the frequency-limiting current corresponding to different value ranges of the operating parameters was measured through a large number of experiments, and the mapping relationship between the value ranges of the material operating parameters and the frequency-limiting current was pre-configured in the clothing processing equipment.

[0074] For a certain range of operating parameters, during the experiment, when the operating parameters of the clothing processing equipment are within this range, the critical frequency of the compressor is measured. This critical frequency indicates that if the compressor's operating frequency is greater than the critical frequency when the operating parameters are within this range, a shutdown will be triggered quickly; if the compressor's operating frequency is less than or equal to the critical frequency, a shutdown will not be triggered. The current of the compressor's inverter drive board is measured when the operating parameters are within this range and the compressor's operating frequency reaches the critical frequency. This current is then determined as the frequency-limiting current corresponding to this range. Alternatively, in some embodiments, a target frequency less than the critical frequency and with a preset difference from the critical frequency can be determined. The current of the compressor's inverter drive board when the compressor's operating frequency reaches the target frequency when the operating parameters are within this range is then determined as the frequency-limiting current corresponding to this range. The preset value can be 0.5A or 1A, etc.

[0075] The frequency-limiting current corresponding to the value range of the above operating parameters can also be obtained by conducting multiple tests on the same drying program of multiple garment processing devices of the same model, obtaining multiple frequency-limiting currents, and taking the average, median or minimum value of these multiple frequency-limiting currents as the frequency-limiting current corresponding to the value range of the operating parameters when the garment processing device of that model executes the drying program.

[0076] During the current drying process of the garment processing equipment, the operating parameters of the garment processing equipment are detected in real time. Based on the pre-configured mapping relationship between the value range of the operating parameters and the frequency limiting current, the value range to which the detected operating parameter belongs is determined, and then the frequency limiting current corresponding to the value range to which the operating parameter belongs is obtained from the above mapping relationship.

[0077] Since operating parameters can include one or more of the following: compressor discharge temperature, discharge pressure, condenser temperature, and inlet or outlet air temperature of the garment processing drum, the aforementioned mapping relationship can include one or more of the following: a mapping relationship between discharge temperature and frequency limiting current; a mapping relationship between discharge pressure and frequency limiting current; a mapping relationship between condenser temperature and frequency limiting current; a mapping relationship between inlet air temperature and frequency limiting current; and a mapping relationship between outlet air temperature and frequency limiting current. Alternatively, the mapping relationship can also include mapping relationships between multiple operating parameters and frequency limiting current, such as mapping relationships between discharge temperature, discharge pressure, and frequency limiting current, or mapping relationships between discharge temperature, condenser temperature, and frequency limiting current.

[0078] As an example, Table 1 shows the mapping relationship between the compressor's exhaust temperature and the frequency-limiting current. This application does not limit the specific values ​​of the frequency-limiting current and exhaust temperature to the values ​​shown in Table 1.

[0079] Table 1

[0080] Frequency limiting current Exhaust temperature 6A T>100℃ 7A 90℃＜T≤100℃ 8A T≤90℃

[0081] In garment processing equipment, a pre-configured mapping relationship between the range of operating parameters and the frequency-limiting current is established. During the execution of the current drying program, the corresponding frequency-limiting current can be directly retrieved from the pre-configured mapping relationship based on the currently detected operating parameters. This allows for rapid determination of the frequency-limiting current, improving the efficiency of adjusting the compressor's operating frequency. Furthermore, the frequency-limiting current corresponding to the operating parameter is the compressor current when the compressor's operating frequency is less than or equal to the critical shutdown frequency under the compressor load corresponding to that operating parameter. Therefore, using this frequency-limiting current to adjust the compressor's operating frequency helps reduce situations where the compressor shuts down due to excessive load or temperature.

[0082] In some embodiments of this application, after determining the corresponding frequency-limiting current based on the operating parameters of the clothing processing equipment, the operating frequency of the compressor is adjusted in the following manner: specifically, based on the frequency-limiting current, multiple current thresholds are obtained, each current threshold is used to trigger different adjustment operations on the operating frequency of the compressor; the operating current of the compressor is detected; and the operating frequency of the compressor is adjusted based on the operating current, the frequency-limiting current, and the multiple current thresholds.

[0083] The different adjustment operations mentioned above can include reducing the compressor's frequency ramp-up rate, controlling the compressor to operate at a fixed frequency, and controlling the compressor to stop. The frequency ramp-up rate characterizes the amount by which the compressor's operating frequency increases per unit time. When controlling the compressor to operate at a fixed frequency, the fixed frequency can be a preset frequency value or the compressor's current operating frequency.

[0084] The operating current of the compressor can be the current of the compressor's inverter drive board. The inverter drive board is connected to the controller of the garment processing equipment. The current detection circuit in the inverter drive board detects the current of the inverter drive board and transmits the current to the controller, which uses this current as the operating current of the compressor.

[0085] The compressor's operating frequency is adjusted based on the compressor's operating current, the frequency-limiting current corresponding to the current operating parameters, and multiple current thresholds obtained based on the frequency-limiting current.

[0086] The above embodiments obtain multiple current thresholds that can trigger different adjustment operations based on frequency limiting current. Therefore, the embodiments of this application can perform a variety of different adjustment operations on the operating frequency of the compressor, which improves the flexibility and accuracy of frequency adjustment and helps to reduce the situation where the compressor stops due to excessive temperature or excessive load.

[0087] In some embodiments of this application, the process of obtaining the above-mentioned multiple current thresholds may include obtaining a second current threshold corresponding to the frequency limiting current and at least one first current threshold from a preset mapping relationship between frequency limiting current and current threshold; the first current threshold is used to trigger the compressor to operate at a frequency ramp rate less than a preset normal frequency ramp rate, and different first current thresholds correspond to different frequency ramp rates; the second current threshold is used to trigger a shutdown operation.

[0088] This application embodiment pre-determines the correspondence between different frequency-limiting currents and various current thresholds through testing, and pre-configures the mapping relationship between frequency-limiting currents and current thresholds in the garment processing equipment. Thus, after the garment processing equipment obtains the corresponding frequency-limiting current based on operating parameters during operation, it can quickly obtain the corresponding current thresholds from the mapping relationship between frequency-limiting currents and current thresholds by looking up a table, thereby improving the processing efficiency of the garment processing equipment.

[0089] The different first current thresholds correspond to different frequency ramp-up rates. The smaller the difference between the first current threshold and the frequency-limiting current, the smaller the frequency ramp-up rate corresponding to the first current threshold. This allows the compressor's operating frequency to increase more slowly, reducing the possibility of the compressor's operating frequency increasing too quickly, causing the temperature to rise too high and triggering a shutdown. The second current threshold is used to trigger the shutdown operation. When the compressor's operating current reaches the second current threshold, a shutdown operation is triggered in a timely manner, reducing damage to the heat pump system or other components of the clothing processing equipment caused by excessive temperature or excessive compressor load.

[0090] In some embodiments of this application, the process of obtaining the above-mentioned multiple current thresholds may include: determining at least one first current threshold based on the frequency limiting current and a preset step size value, wherein the first current threshold is used to trigger the compressor to operate at a frequency ramp rate less than a preset normal frequency ramp rate, and different first current thresholds correspond to different frequency ramp rates; obtaining a preset shutdown current corresponding to the frequency limiting current as a second current threshold, wherein the second current threshold is used to trigger a shutdown operation.

[0091] The preset step size can be 0.5A, 1A, etc. Each first current threshold corresponds to a frequency ramp rate, and the frequency ramp rate corresponding to each first current threshold is less than the preset normal frequency ramp rate. In this embodiment, the mapping relationship between the frequency ramp rate and the target difference can be pre-configured in the garment processing equipment. The target difference is the difference between the first current threshold and the frequency limiting current. The larger the target difference, the larger the corresponding frequency ramp rate; the smaller the target difference, the smaller the corresponding frequency ramp rate. The preset normal frequency ramp rate is the frequency ramp rate of the compressor before the frequency limiting current or the adjustment operation corresponding to the above current threshold is applied to the compressor's operating frequency. The preset normal frequency ramp rate can include 1Hz / s or 1.2Hz / s, etc. As an example, assuming the preset normal frequency ramp rate is 1Hz / s and the preset step size is 1A, the mapping relationship between the frequency ramp rate and the target difference can be shown in Table 2.

[0092] Table 2

[0093] upsampling rate target difference 0.2Hz / s 1A 0.5Hz / s 2A

[0094] Based on the pre-configured mapping relationship between the boost rate and the target difference, after determining each first current threshold, the boost rate corresponding to the first current threshold can be quickly determined from this mapping relationship.

[0095] The aforementioned preset shutdown current is the current of the compressor's inverter drive board when the compressor's load or temperature is too high, causing the compressor to shut down during the current drying program, provided that the operating parameters of the garment processing equipment are within the range corresponding to this frequency-limited current. This preset shutdown current is used as a second current threshold to trigger the shutdown operation. The shutdown operation is equivalent to adjusting the compressor's operating frequency to zero, enabling the compressor's load and temperature to quickly drop to a safe range when the load or temperature is too high.

[0096] In this embodiment, one or more first current thresholds less than the frequency-limiting current are determined. The frequency ramp rate corresponding to each first current threshold is less than the preset normal frequency ramp rate, and the frequency-limiting current corresponding to the first current threshold closest to the frequency-limiting current is smaller. Therefore, before the compressor's operating current reaches the frequency-limiting current, the compressor's frequency ramp rate will be reduced. Furthermore, the closer the compressor's operating current is to the frequency-limiting current, the slower the compressor's operating frequency increases, thus allowing the compressor's operating frequency to rise more slowly and reducing the possibility of the compressor's operating frequency rising too quickly, causing the temperature to rise too high and triggering a shutdown. Using a preset shutdown current as a second current threshold allows for timely shutdown operation when the compressor's operating current reaches the preset shutdown current, reducing damage to the heat pump system or other components of the clothing processing equipment caused by excessively high temperatures or excessive compressor load.

[0097] In some embodiments of this application, the process of determining the first current threshold may include determining a plurality of first current thresholds based on the frequency limiting current and a preset step size value; the plurality of first current thresholds are arranged in order of size, and the difference between two adjacent first current thresholds is the preset step size value.

[0098] Since each first current threshold is less than the frequency-limiting current, the difference between the frequency-limiting current and the preset step size value can be determined to obtain the first first current threshold. Then, the preset step size value is subtracted from the first first current threshold to obtain the second first current threshold. This process is repeated to obtain multiple first current thresholds. Alternatively, the differences between the frequency-limiting current and different integer multiples of the preset step size value can be determined separately to obtain multiple first current thresholds. For example, the differences between the frequency-limiting current and one, two, or three times the preset step size value can be determined separately.

[0099] One or more first current thresholds less than the frequency limiting current are determined. The first current threshold is used to trigger the compressor to operate at a frequency increase rate less than the preset normal frequency increase rate. Therefore, before the compressor's operating current reaches the frequency limiting current, the compressor's frequency increase rate will be reduced. The closer the compressor's operating current is to the frequency limiting current, the slower the compressor's operating frequency will increase. This allows the compressor's operating frequency to increase more slowly, reducing the possibility of the compressor's operating frequency increasing too quickly, causing the temperature to rise too high and triggering a shutdown. This improves the flexibility and precision of adjusting the compressor's operating frequency.

[0100] In some embodiments of this application, the operating frequency of the compressor is adjusted based on the compressor's current operating current, frequency limiting current, and multiple current thresholds. Specifically, this may include: determining the current change phase to which the operating current belongs based on the compressor's operating current, where the current change phase includes a current rising phase or a current falling phase; and adjusting the compressor's operating frequency based on the compressor's current operating current, current change phase, frequency limiting current, and multiple current thresholds.

[0101] During the drying process, the compressor's operating frequency, operating current, discharge temperature, and load are all positively correlated, meaning these parameters may rise or fall synchronously. Therefore, when the compressor's operating current is in the rising phase, the operating frequency, discharge temperature, and load will all be rising, potentially leading to overheating or overload and causing shutdown. Conversely, when the compressor's operating current is in the falling phase, these parameters will also be falling, preventing shutdown. Therefore, distinguishing between the rising and falling phases of the compressor's operating current allows for different frequency adjustments at different stages, improving the flexibility of frequency regulation. This ensures the frequency adjustment adapts to changes in the compressor's operating current during the drying process, improving accuracy and rationality of frequency control, ultimately enhancing the drying effect.

[0102] In some embodiments of this application, the current change phase is determined as the current rise phase, and the compressor operating frequency is adjusted in the following ways: based on the current operating current reaching the frequency limiting current, the compressor is controlled to operate at the current operating frequency; based on the current operating current reaching any one of a plurality of current thresholds, the adjustment operation corresponding to any current threshold is executed.

[0103] The compressor's current operating current is compared with the frequency-limiting current and various current thresholds. If the current operating current equals the frequency-limiting current, the compressor is controlled to operate at the current operating frequency, maintaining the compressor's frequency at the current operating frequency. If the current operating current equals a certain current threshold, the adjustment operation corresponding to that current threshold is executed.

[0104] The frequency-limiting current is less than and close to the preset shutdown current. When the compressor's operating current reaches the frequency-limiting current, the compressor's operating frequency will not increase, maintaining its current operating frequency. This limits the compressor's maximum operating frequency, preventing overheating and shutdown due to excessively high frequencies. When the compressor's operating frequency reaches a certain current threshold, the corresponding adjustment operation is executed. During the drying program, the compressor's operating frequency is adjusted multiple times according to changes in the compressor's operating current. This more flexible and precise adjustment effectively reduces shutdowns caused by excessive compressor load or overheating, shortens the total drying program time, and improves drying efficiency.

[0105] In some embodiments of this application, the plurality of current thresholds includes at least one first current threshold and one second current threshold. If the current operating current reaches the first current threshold included in the plurality of current thresholds, a target boost rate corresponding to the first current threshold is obtained, and the compressor is controlled to operate at the target boost rate; the target boost rate is less than the current boost rate of the compressor. If the current operating current reaches the second current threshold included in the plurality of current thresholds, the compressor is controlled to stop.

[0106] When the operating current reaches a first current threshold, the compressor frequency is controlled to increase at a target rate corresponding to the first current threshold. This target rate is lower than the current rate, meaning that when the operating current reaches the first current threshold, the compressor's rate of increase is reduced, slowing down the rate at which the compressor's operating frequency rises. This reduces the likelihood of the compressor being overloaded or overheated and triggering a shutdown. Furthermore, in this embodiment, the first current thresholds are arranged in ascending order, and the corresponding rate of increase for each threshold is arranged in descending order. Therefore, during the current rise phase, the compressor's rate of increase can be gradually reduced, allowing the compressor's operating current to gradually approach the frequency-limiting current. Consequently, when the operating current reaches the frequency-limiting current, the compressor's operating frequency is maintained at the current operating frequency. This gradual adjustment of the compressor's operating frequency prevents the compressor from changing too rapidly and triggering a shutdown before the frequency can be limited. Reaching the frequency-limiting current and limiting the compressor to its current operating frequency helps maintain the compressor's load or reduces the rate of load increase. When the compressor's operating current reaches the second current threshold, it indicates that the compressor's load or exhaust temperature has reached the conditions for triggering shutdown. At this time, the compressor is controlled to stop, thereby preventing the temperature from continuing to rise and damaging the equipment.

[0107] In some embodiments of this application, if the current change phase is determined to be a current decrease phase; based on the current operating current being less than the smallest current threshold among multiple current thresholds, the compressor is controlled to operate at a preset normal frequency ramp-up rate; based on the current operating current being greater than or equal to the smallest current threshold, the compressor is controlled to operate at the current operating frequency.

[0108] After the drying program starts, the compressor's operating current changes from low to high, that is, it first goes through a current rise phase. During this phase, the compressor's operating frequency is adjusted in the manner described in the above embodiment. When the operating current rises to the frequency limiting current, the compressor is controlled to maintain the current operating frequency. After that, the compressor's operating current may continue to rise until it reaches the preset shutdown current and triggers shutdown, or it may remain unchanged at the frequency limiting current, or it may begin to decrease.

[0109] If the current continues to rise to trigger a shutdown, after a certain shutdown period, or after shutdown, parameters such as the compressor's exhaust temperature, exhaust pressure, or the inlet temperature of the clothes processing drum are detected. When these parameters meet the conditions for restarting, the compressor is controlled to resume operation. After resuming operation, the compressor's operating current will change from low to high again, that is, it will re-enter the current rising phase, and be adjusted according to the frequency adjustment method of the current rising phase in the aforementioned embodiment. The compressor will resume operation after a certain shutdown period, which can be, but is not limited to, 3 minutes or 5 minutes. The conditions for restarting can include, but are not limited to, the exhaust temperature decreasing to below the preset shutdown temperature, the exhaust pressure decreasing to below the preset shutdown pressure, and the inlet temperature of the clothes processing drum decreasing to below a preset temperature threshold. The preset shutdown temperature is the compressor's exhaust temperature when the shutdown is triggered, the preset shutdown pressure is the compressor's exhaust pressure when the shutdown is triggered, and the preset temperature threshold is the inlet temperature of the clothes processing drum when the shutdown is triggered.

[0110] During the current rise phase, when the operating current is greater than or equal to the frequency limiting current but less than the preset shutdown current, the compressor's operating frequency is maintained at the operating frequency when the operating current equals the frequency limiting current.

[0111] If the compressor's operating current begins to decrease, it enters the current reduction phase. During this process, the compressor's operating frequency remains constant as it decreases from above the frequency limiting current to the minimum current threshold. When the operating current continues to decrease to below the minimum current threshold, the compressor is controlled to resume operation at the preset normal frequency ramp-up rate.

[0112] In other words, during the current-decreasing phase, when the operating current is greater than or equal to the minimum current threshold but less than the preset shutdown current, the compressor's operating frequency remains constant. During this process, the compressor's operating frequency is the same as when the operating current reaches the frequency-limiting current during the current-increasing phase. Throughout the current-decreasing phase, as long as the operating current is greater than or equal to the minimum current threshold, the compressor's operating frequency remains at the frequency mentioned above when the current reaches the frequency-limiting current. This allows for a relatively high operating frequency to be maintained for a considerable period during the drying process, thereby providing higher heating capacity and improving drying efficiency. When the operating current decreases to below the minimum current threshold, the compressor resumes operation at the preset normal frequency ramp-up rate, allowing the compressor's operating frequency to continue to rise. This enables the achievement of a higher compressor operating frequency without excessively high compressor load or temperature, improving the flexibility and accuracy of compressor frequency regulation, reducing the number of shutdowns during the drying process, shortening drying time, and increasing drying efficiency.

[0113] To facilitate understanding of the control method provided in the embodiments of this application, the following description is provided in conjunction with the accompanying drawings. Figure 2 The schematic diagram shown illustrates the principle of compressor frequency regulation. Figure 2 The vertical axis represents current, while the horizontal axis has no practical meaning. The line segments in the coordinate system represent the curves showing the change in the compressor's operating current. The vertical axis schematically illustrates a first current threshold, a frequency-limiting current, and a second current threshold (i.e., the preset shutdown current). After the drying program starts, the compressor's operating current gradually increases from zero. When the operating current reaches the first current threshold, the compressor is controlled to operate at a frequency increase rate lower than the preset normal frequency increase rate, which is the slow frequency increase shown in the figure. When the operating current reaches the frequency-limiting current, the compressor is controlled to maintain the current operating frequency, which is the fixed frequency shown in the figure. The compressor stops when the operating current reaches the second current threshold. During the current decrease phase, the compressor's operating frequency remains constant as the current decreases between the second and first current thresholds, meaning it is limited to a fixed frequency. When the operating frequency drops below the first current threshold, the compressor resumes operation at the preset normal frequency increase rate, which is the normal operation of the compressor shown in the figure.

[0114] As an example, Figure 3 This illustration shows a specific example flow diagram of a control method for a garment processing device provided in an embodiment of this application. For example... Figure 3 As shown, the process includes the following steps:

[0115] S1: Controls the start of the drying program and detects the compressor's exhaust temperature.

[0116] S2: Determine the temperature range to which the exhaust temperature belongs, and obtain the frequency limiting current corresponding to that temperature range.

[0117] S3: Based on the frequency limiting current, obtain a first current threshold and a second current threshold. The first current threshold is less than the frequency limiting current, and the second current threshold is a preset shutdown current.

[0118] S4: Detects the current operating current of the compressor.

[0119] S5: Determine that the current operating current has reached the first current threshold, and control the compressor to increase the frequency at the frequency increase rate corresponding to the first current threshold. The frequency increase rate corresponding to the first current threshold is less than the preset normal frequency increase rate.

[0120] S6: Determine that the current operating current has reached the frequency limiting current, and control the compressor to maintain the current operating frequency unchanged.

[0121] S7: If the current operating current reaches the second current threshold, control the compressor to stop.

[0122] The above Figure 3 The process shown is for illustrative purposes only. In actual applications, the clothing processing equipment can be controlled in any combination of the embodiments described above.

[0123] In this embodiment, the frequency-limiting current determined based on operating parameters can adapt to the compressor's load. Adjusting the compressor's operating frequency based on this frequency-limiting current can effectively reduce the occurrence of excessive compressor load and effectively regulate the temperature, reducing shutdowns due to excessive compressor load or temperature. This shortens the total drying time and improves drying efficiency. Furthermore, it reduces the likelihood of components on the compressor's inverter drive board overheating and triggering shutdowns, thus improving the stability and reliability of the garment processing equipment.

[0124] Some embodiments of this application provide a garment processing device, including: a controller and a compressor; the controller is communicatively connected to the compressor, and the compressor is a variable frequency compressor.

[0125] The controller is used to acquire the operating parameters of the garment processing equipment, which can characterize the load of the compressor; determine the frequency limiting current corresponding to the operating parameters; and adjust the operating frequency of the compressor based on the frequency limiting current.

[0126] The controller is specifically used to determine the range of values ​​to which the operating parameters belong and to obtain the frequency-limiting current corresponding to the range of values.

[0127] The controller is specifically used to obtain multiple current thresholds based on the frequency-limiting current, and each current threshold is used to trigger different adjustment operations on the compressor's operating frequency; detect the compressor's operating current; and adjust the compressor's operating frequency based on the operating current, the frequency-limiting current, and the multiple current thresholds.

[0128] The controller is specifically used to obtain a second current threshold and at least one first current threshold corresponding to the frequency-limiting current from a preset mapping relationship between frequency-limiting current and current threshold; the first current threshold is used to trigger the compressor to run at a frequency ramp rate that is less than the preset normal frequency ramp rate, and different first current thresholds correspond to different frequency ramp rates; the second current threshold is used to trigger a shutdown operation.

[0129] The controller is specifically used to determine at least one first current threshold based on the frequency limiting current and a preset step size value. The first current threshold is used to trigger the compressor to run at a frequency ramp rate that is less than the preset normal frequency ramp rate. Different first current thresholds correspond to different frequency ramp rates. The controller also obtains a preset shutdown current corresponding to the frequency limiting current as a second current threshold, which is used to trigger a shutdown operation.

[0130] The controller is specifically used to determine multiple first current thresholds based on the frequency-limiting current and a preset step size value; the multiple first current thresholds are arranged in order of size, and the difference between two adjacent first current thresholds is the preset step size value.

[0131] The controller is specifically used to determine the current change phase of the operating current based on the compressor's operating current, which includes a current rising phase or a current falling phase; and to adjust the compressor's operating frequency based on the compressor's current operating current, current change phase, frequency limiting current, and multiple current thresholds.

[0132] The controller is specifically used to determine that the current change phase is the current rise phase; based on the current operating current reaching the frequency limiting current, it controls the compressor to operate at the current operating frequency; based on the current operating current reaching any of the multiple current thresholds, it executes the adjustment operation corresponding to any current threshold.

[0133] The controller is specifically used to obtain the target frequency ramp rate corresponding to the first current threshold based on the current operating current reaching a first current threshold among multiple current thresholds, and control the compressor to operate at the target frequency ramp rate; the target frequency ramp rate is less than the current frequency ramp rate of the compressor; and to control the compressor to stop based on the current operating current reaching a second current threshold among multiple current thresholds.

[0134] The controller is specifically used to determine that the current change phase is the current decrease phase; based on the current operating current being less than the smallest current threshold among multiple current thresholds, it controls the compressor to operate at a preset normal frequency ramp-up rate; based on the current operating current being greater than or equal to the smallest current threshold, it controls the compressor to operate at the current operating frequency.

[0135] In this embodiment of the application, the operating parameters include at least one of the following: compressor exhaust temperature, exhaust pressure, condenser temperature, inlet air temperature of the clothes processing drum, and outlet air temperature.

[0136] The clothing processing device provided in the above embodiments of this application and the control method of the clothing processing device provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application stored therein.

[0137] This application also provides a garment processing device to execute the control method for the garment processing device described above. This garment processing device may be a dryer or a washer-dryer combo with a variable frequency heat pump system, etc.

[0138] Please refer to Figure 4 This illustrates a schematic diagram of a garment processing device provided by some embodiments of this application. For example... Figure 4 As shown, the garment processing device 40 includes: a processor 400, a memory 401, a bus 402, and a communication interface 403. The processor 400, the communication interface 403, and the memory 401 are connected via the bus 402. The memory 401 stores a computer program that can run on the processor 400. When the processor 400 runs the computer program, it executes the control method of the garment processing device provided in any of the foregoing embodiments of this application.

[0139] The memory 401 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this device network element and at least one other network element is achieved through at least one communication interface 403 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0140] Bus 402 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory 401 is used to store programs. After receiving an execution instruction, the processor 400 executes the program. The control method of the clothing processing device disclosed in any of the foregoing embodiments of this application can be applied to the processor 400, or implemented by the processor 400.

[0141] The processor 400 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 400 or by instructions in software form. The processor 400 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 401. The processor 400 reads the information in memory 401 and, in conjunction with its hardware, completes the steps of the above method.

[0142] The clothing processing device and the control method of the clothing processing device provided in this application are based on the same inventive concept and have the same beneficial effects as the methods used, operated or implemented.

[0143] This application also provides a computer-readable storage medium corresponding to the control method for the clothing processing equipment provided in the foregoing embodiments. Please refer to... Figure 5 The computer-readable storage medium shown is an optical disc 30, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it executes the control method of the clothing processing device provided in any of the foregoing embodiments.

[0144] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0145] The computer-readable storage medium provided in the above embodiments of this application and the control method of the clothing processing device provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application stored therein.

[0146] It should be noted that:

[0147] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0148] Similarly, it should be understood that, for the sake of brevity and to aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of this application, various features of this application are sometimes grouped together in a single embodiment, figure, or description thereof. However, this disclosure should not be interpreted as reflecting the following schematic diagram: that is, the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of this application.

[0149] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0150] The above description is merely a preferred embodiment 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 technical scope 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 control method for a garment processing device, characterized in that, The method includes: Obtain the operating parameters of the garment processing equipment, wherein the operating parameters can characterize the load of the compressor; Determine the frequency limiting current corresponding to the operating parameters; The operating frequency of the compressor is adjusted based on the frequency-limiting current.

2. The method according to claim 1, characterized in that, Determining the frequency-limiting current corresponding to the operating parameters includes: Determine the value range to which the operating parameter belongs; Obtain the frequency-limiting current corresponding to the value range.

3. The method according to claim 1, characterized in that, Adjusting the operating frequency of the compressor based on the frequency-limiting current includes: Based on the frequency-limiting current, multiple current thresholds are obtained, and each current threshold is used to trigger different adjustment operations on the operating frequency of the compressor. Detect the operating current of the compressor; The operating frequency of the compressor is adjusted based on the operating current, the frequency limiting current, and the multiple current thresholds.

4. The method according to claim 3, characterized in that, The process of obtaining multiple current thresholds based on the frequency-limiting current includes: From the preset mapping relationship between frequency-limiting current and current threshold, obtain the second current threshold and at least one first current threshold corresponding to the frequency-limiting current; The first current threshold is used to trigger the compressor to operate at a frequency increase rate lower than the preset normal frequency increase rate, and different first current thresholds correspond to different frequency increase rates; the second current threshold is used to trigger a shutdown operation.

5. The method according to claim 3, characterized in that, The process of obtaining multiple current thresholds based on the frequency-limiting current includes: Based on the frequency limiting current and the preset step size value, at least one first current threshold is determined. The first current threshold is used to trigger the compressor to operate at a frequency increase rate that is less than the preset normal frequency increase rate. Different first current thresholds correspond to different frequency increase rates. The preset shutdown current corresponding to the frequency limiting current is obtained as the second current threshold, and the second current threshold is used to trigger the shutdown operation.

6. The method according to claim 5, characterized in that, The step of determining at least one first current threshold based on the frequency-limiting current and a preset step size value includes: Based on the frequency-limiting current and the preset step size value, a plurality of first current thresholds are determined; The plurality of first current thresholds are arranged in order of magnitude, and the difference between two adjacent first current thresholds is the preset step size value.

7. The method according to claim 3, characterized in that, Adjusting the operating frequency of the compressor based on the operating current, the frequency limiting current, and the multiple current thresholds includes: Based on the operating current of the compressor, determine the current change stage to which the operating current belongs, and the current change stage includes a current rising stage or a current falling stage; The operating frequency of the compressor is adjusted based on the compressor's current operating current, the current change stage, the frequency limiting current, and the multiple current thresholds.

8. The method according to claim 7, characterized in that, The step of adjusting the operating frequency of the compressor based on the compressor's current operating current, the current change phase, the frequency limiting current, and the multiple current thresholds includes: The current change phase is defined as the current rise phase; Based on the current operating current reaching the frequency limiting current, the compressor is controlled to operate at the current operating frequency; If the current operating current reaches any one of the multiple current thresholds, perform the adjustment operation corresponding to that current threshold.

9. The method according to claim 8, characterized in that, The step of performing an adjustment operation corresponding to any one of the plurality of current thresholds based on the current operating current reaching that threshold includes: Based on the current operating current reaching a first current threshold among the plurality of current thresholds, a target boost rate corresponding to the first current threshold is obtained, and the compressor is controlled to operate at the target boost rate; the target boost rate is less than the current boost rate of the compressor; The compressor is controlled to stop based on the current operating current reaching a second current threshold among the plurality of current thresholds.

10. The method according to claim 7, characterized in that, The step of adjusting the operating frequency of the compressor based on the compressor's current operating current, the current change phase, the frequency limiting current, and the multiple current thresholds includes: The current change phase is defined as the current decrease phase; Based on the fact that the current operating current is less than the smallest current threshold among the plurality of current thresholds, the compressor is controlled to operate at a preset normal frequency ramp rate; Based on the fact that the current operating current is greater than or equal to the minimum current threshold, the compressor is controlled to operate at the current operating frequency.

11. The method according to any one of claims 1-10, characterized in that, The operating parameters include at least one of the following: the compressor's exhaust temperature, exhaust pressure, condenser temperature, and the inlet and outlet air temperatures of the garment processing drum.

12. A garment processing device, characterized in that, include: Controller and compressor; The controller is configured to perform the method according to any one of claims 1-11 to adjust the operating frequency of the compressor.

13. A garment processing device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method as claimed in any one of claims 1-11.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by a processor to implement the method as described in any one of claims 1-11.

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