Clothes drying machine and lift control system therefor

Abstract

The application relates to a clothes airing machine and a lifting control system thereof, the lifting control system comprising a zero-crossing detection module and a control module; an input end of the zero-crossing detection module is connected with a mains access module of the clothes airing machine, and is used for performing zero-crossing detection on mains power accessed to the clothes airing machine; a signal input end of the control module is connected with an output end of the zero-crossing detection unit, and is used for receiving a zero-crossing detection signal sent by the zero-crossing detection module and controlling the clothes airing machine to perform a lifting action according to the zero-crossing detection signal; compared with the prior art, the technical scheme of the application can improve the operation reliability of the clothes airing machine under emergent scenes such as loss of a remote controller, battery depletion or emergent power failure.

Description

Technical Field

[0001] This application relates to the technical field of smart homes, and more particularly to a clothes drying rack and a lifting control system therefor. Background Technology

[0002] Existing smart clothes drying racks have multiple operating methods for lifting and lowering, including remote control, voice commands, gesture recognition, mobile terminal applications, and gentle lifting.

[0003] Currently, remote control has become the most widely used control method in the market due to its practicality and low cost. It is especially suitable for models that only support a single control mode. This method transmits commands through wireless signals, and users can remotely control the lifting and lowering function of the clothes drying rack by operating the buttons on the remote control. It is characterized by simple deployment and intuitive operation.

[0004] However, the lifting control relies entirely on the physical device of the remote control. Users must hold the remote control for extended periods. If the remote control is lost, damaged, or the battery is depleted, the device will be completely unusable, and users will not be able to quickly regain control of the device. These defects severely limit the operational reliability of the smart clothes drying rack. Utility Model Content

[0005] This application provides a clothes drying rack and a lifting control system therefor, which can improve the operational reliability of the clothes drying rack in emergency situations such as loss, damage or battery depletion of the remote control.

[0006] In a first aspect, this application provides a lifting control system for a clothes drying rack, including a zero-crossing detection module and a control module; the input terminal of the zero-crossing detection module is connected to the mains power access module of the clothes drying rack, and is used to perform zero-crossing detection on the mains power connected to the clothes drying rack; the signal input terminal of the control module is connected to the output terminal of the zero-crossing detection module, and is used to receive the zero-crossing detection signal sent by the zero-crossing detection module, and control the clothes drying rack to perform lifting actions according to the zero-crossing detection signal.

[0007] In one possible implementation, the zero-crossing detection module includes an optical coupling unit and a DC power input unit, wherein the input terminal of the optical coupling unit is connected to the output terminal of the AC power access module of the clothes dryer, and the output terminals of the optical coupling unit and the DC power input unit are respectively connected to the signal input terminal of the control module.

[0008] In one possible implementation, the lifting control system for a clothes drying rack provided in this application further includes: a power conversion module; the power conversion module is connected to the zero-crossing detection module and the control module respectively, and is used to supply power to the zero-crossing detection module and the control module.

[0009] In one possible implementation, the power conversion module includes a buck converter, an energy storage unit, and a power output unit.

[0010] In one possible implementation, the output of the step-down converter is connected to the input of the energy storage unit, the output of the energy storage unit is connected to the power output unit, and the power output unit is connected to the DC power input unit.

[0011] In one possible implementation, the optical coupling unit includes a voltage divider subunit, a protection subunit, and an optical coupling subunit.

[0012] In one possible implementation, the first end of the voltage divider subunit is connected to the first mains power input pin, the second end of the voltage divider subunit is connected to the first end of the protection subunit, the second end of the protection subunit and the second mains power input pin are respectively connected to the input end of the optocoupler subunit, and the output end of the optocoupler subunit is connected to the signal input end of the control module.

[0013] In one possible implementation, the input terminal of the zero-crossing detection module includes a first mains power access pin and a second mains power access pin; wherein the first mains power access pin is connected to the mains live wire, and the second mains power access pin is connected to the mains neutral wire.

[0014] In one possible implementation, the lifting control system for a clothes drying rack provided in this application further includes: a position detection module; the position detection module is connected to the control module and is used to detect the travel position information of the drying rod assembly in the clothes drying rack, so that after receiving the zero-crossing detection signal, the control module controls the drying rod assembly to perform an upward or downward action based on the travel position information of the drying rod assembly.

[0015] Secondly, this application provides a clothes drying rack, including the lifting control system described in any of the above claims.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art:

[0017] This application provides a clothes drying rack and a lifting control system therefor, including a zero-crossing detection module and a control module. The input terminal of the zero-crossing detection module is connected to the mains power access module of the clothes drying rack, and is used to perform zero-crossing detection on the mains power connected to the clothes drying rack. The signal input terminal of the control module is connected to the output terminal of the zero-crossing detection module, and is used to receive the zero-crossing detection signal sent by the zero-crossing detection module, and control the clothes drying rack to perform lifting and lowering actions according to the zero-crossing detection signal. Compared with the prior art, the technical solution of this application, by setting a zero-crossing detection module and a control module, the zero-crossing detection module performs zero-crossing detection on the connected mains power and sends a signal to the control module, and the control module controls the lifting and lowering of the clothes drying rack accordingly, without relying on a remote control. In emergency situations such as loss, damage, or battery depletion of the remote control, the user can operate the clothes drying rack to lift and lower by switching on the mains power switch, which can avoid the limitations of traditional remote control control methods and improve operational reliability. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 A schematic diagram of a lifting control system for a clothes drying rack provided in this application;

[0022] Figure 2 This application provides a schematic diagram of the structure of a zero-crossing detection module according to one embodiment.

[0023] Figure 3 This is a schematic diagram of the structure of an optical coupling unit according to an embodiment of this application;

[0024] Figure 4 Another structural schematic diagram of a zero-crossing detection module provided in this application;

[0025] Figure 5 This application provides a schematic diagram of the structure of a power conversion module according to one embodiment.

[0026] Figure 6 Another structural schematic diagram of a power conversion module provided in this application;

[0027] Figure 7 This is a structural diagram of a clothes drying rack provided in this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] The system includes a mains power access module 100, a zero-crossing detection module 10, a control module 20, an input terminal 101 for the zero-crossing detection module, an optocoupler unit 102, a DC power input unit 103, a voltage divider subunit 1021, a protection subunit 1022, an optocoupler subunit 1023, a first filter unit 104, a power conversion module 30, a step-down conversion unit 301, an energy storage unit 302, a power output unit 303, a 12V power input unit 304, a second filter unit 305 and a third filter unit 306, and a lifting control system 200. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0032] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0033] Figure 1 This application provides a structural schematic diagram of a lifting control system for a clothes drying rack; as shown. Figure 1 As shown, the lifting control system for the clothes drying rack includes a zero-crossing detection module 10 and a control module 20, as detailed below:

[0034] In one embodiment, the input terminal of the zero-crossing detection module 10 is connected to the mains power access module 100 of the clothes drying machine, and is used to perform zero-crossing detection on the mains power connected to the clothes drying machine.

[0035] In one embodiment, the signal input terminal of the control module 20 is connected to the output terminal of the zero-crossing detection unit 10, and is used to receive the zero-crossing detection signal sent by the zero-crossing detection module 10, and control the clothes drying machine to perform lifting and lowering actions according to the zero-crossing detection signal.

[0036] In one embodiment, the clothes drying rack is provided with a mains power access module 100, wherein the mains power access module 100 is used to connect the clothes drying rack to mains power, and the mains power access module 100 includes a neutral wire and a live wire.

[0037] In one embodiment, the input terminal 101 of the zero-crossing detection module 10 includes a first mains power access pin ACL1 and a second mains power access pin ACN2; wherein, the first mains power access pin ACL1 is connected to the mains live wire, and the second mains power access pin ACN2 is connected to the mains neutral wire.

[0038] Specifically, zero-crossing detection is a commonly used technique in AC signal processing to accurately identify the moment when a sinusoidal voltage crosses zero as it transitions from the positive half-cycle to the negative half-cycle or from the negative half-cycle to the positive half-cycle.

[0039] Specifically, zero-crossing detection requires capturing the switching point between the positive and negative half-cycles of the AC power. The neutral wire and the live wire together form a complete voltage loop. By connecting the neutral wire and the live wire simultaneously through the first AC power input pin ACL1 and the second AC power input pin ACN2, the zero-crossing detection module 10 can accurately extract the zero-crossing point of the sine wave and generate a stable square wave signal, providing a reliable basis for judgment for the subsequent control module.

[0040] In one embodiment, the zero-crossing detection module 10 further includes an optical coupling unit 102 and a DC power input unit 103. The input terminal of the optical coupling unit 102 is connected to the output terminal of the AC power input module 100 of the clothes dryer. The output terminals of the optical coupling unit 102 and the DC power input unit 103 are respectively connected to the signal input terminals of the control module 20. Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a zero-crossing detection module according to one embodiment of this application.

[0041] Specifically, the input terminal of the optical coupling unit 102 is connected to the output terminal of the mains access module 101 of the clothes dryer through the first mains access pin ACL1 and the second mains access pin ACN2.

[0042] In one embodiment, the optical coupling unit 102 includes a voltage divider subunit 1021, a protection subunit 1022, and an optical coupling subunit 1023; as shown Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of an optical coupling unit according to an embodiment of this application.

[0043] Specifically, the first end of the voltage divider subunit 1021 is connected to the first mains power input pin ACL1, the second end of the voltage divider subunit 1021 is connected to the first end of the protection subunit 1022, the second end of the protection subunit 1022 and the second mains power input pin ACN2 are respectively connected to the input end of the optocoupler subunit 1023, and the output end of the optocoupler subunit 1023 is connected to the signal input end of the control module 20.

[0044] Specifically, the voltage divider subunit 1021 includes a first voltage divider resistor R40 and a second voltage divider resistor R41, the protection subunit 1022 includes a first diode D7, and the optocoupler subunit 1023 includes an optocoupler U2.

[0045] Specifically, the first voltage divider resistor R40 and the second voltage divider resistor R41 are connected in series.

[0046] Specifically, the first end of the first voltage divider resistor R40 is connected to the first AC power input pin ACL1, the second end of the first voltage divider resistor R40 is connected to the first end of the second voltage divider resistor R41, the second end of the second voltage divider resistor R41 is connected to the negative terminal of the first diode D7 and the first pin of the optocoupler U2, the second pin of the optocoupler U2 is connected to the positive terminal of the first diode D7 and the input terminal of the second AC power input pin ACN2, the third pin of the optocoupler U2 is grounded, and the fourth pin of the optocoupler U2 is connected to the signal input terminal of the control module 20.

[0047] Specifically, the voltage divider subunit 1021 uses a series resistor to divide the high voltage of the neutral line connected to the first mains input pin ACL1 to the low voltage range of the optocoupler subunit 1023, preventing damage to the optocoupler due to direct connection to high voltage. Furthermore, the signal after voltage division by the voltage divider subunit 1021 is transmitted to the protection subunit 1022, where the first diode D7 eliminates reverse voltage or surge impact, ensuring that the voltage at the optocoupler input terminal of the optocoupler subunit 1023 is always within the safe threshold. This achieves the conversion from high voltage to low voltage, and the multi-level protection mechanism composed of the voltage divider subunit 1021 and the protection subunit 1022 enhances the reliability of the circuit.

[0048] Specifically, the input terminal of the optocoupler subunit 1023 is simultaneously connected to the output terminal of the protection subunit 1022 and the second mains power input pin ACN2. When the mains power is normal, the AC voltage between the mains live wire and the mains neutral wire drives the LED inside the optocoupler U2 to periodically turn on or off. The output terminal of the optocoupler subunit 1023 generates a 50Hz square wave signal with a period of 20ms synchronized with the mains power. Based on the connection relationship between the optocoupler subunit 1023 and the signal input terminal of the control module 20, the square wave signal is transmitted to the control module 20 so that the control module 20 can accurately determine the on / off state of the mains power by detecting whether there is a high / low level switch in the square wave signal.

[0049] Specifically, the output of optocoupler U2 is directly connected to the signal input of control module 20. The phototransistor inside optocoupler U2 has no physical connection with the LED diode at the input end. Information is transmitted only through optical signals. This can completely isolate the high voltage of the mains power from the low voltage control circuit in control module 20, prevent high voltage from entering and causing the chip to burn out, and suppress common-mode noise interference to the control logic.

[0050] In one embodiment, the zero-crossing detection module further includes a first filtering unit 104; as shown Figure 4 As shown, Figure 4 This is another structural schematic diagram of a zero-crossing detection module provided in one embodiment of this application.

[0051] The first filter unit 104 includes a third voltage divider resistor R42 and a first filter capacitor C9. The first end of the third voltage divider resistor R42 is connected to the input end of the DC power input unit 103. The second end of the third voltage divider resistor R42 is connected to the fourth pin of the optocoupler U2 and the first end of the first filter capacitor C9. The second end of the first filter capacitor C9 is grounded.

[0052] Specifically, the first filtering unit 104 is an RC low-pass filter module.

[0053] Specifically, when the fourth pin of optocoupler U2, i.e. the optocoupler output terminal, is directly connected to the signal input terminal of control module 20, voltage fluctuations or current surges may damage the chip if there is no filtering module. Therefore, current limiting is set based on the third voltage divider resistor R42 to limit the optocoupler output current within a safe range. At the same time, the first filter capacitor C9 absorbs instantaneous voltage fluctuations, further suppressing glitches in the signal, preventing chip pins from being damaged by voltage overshoot, and extending hardware life.

[0054] Specifically, in complex electromagnetic environments, mains power lines may introduce common-mode or differential-mode interference; the second terminal of the first filter capacitor C9 in the first filter unit 104 is grounded, which can bypass high-frequency noise to ground and reduce its coupling effect on the control chip.

[0055] In one embodiment, the lifting control system for a clothes drying rack provided in this application further includes a position detection module.

[0056] In one embodiment, the position checking module is connected to the control module 20 and is used to detect the travel position information of the drying rod assembly in the clothes drying machine, so that after receiving the zero-crossing detection signal, the control module 20 controls the drying rod assembly to perform an upward or downward action based on the travel position information of the drying rod assembly.

[0057] Specifically, the position detection module includes, but is not limited to, a Hall sensor; by installing a magnetic ring on the shaft of the clothes drying rod lifting motor, the Hall sensor calculates the number of motor rotations by sensing changes in the magnetic field, and converts the number of motor rotations into the lifting distance of the clothes drying rod to determine the travel position information of the clothes drying rod assembly in the clothes drying machine.

[0058] In one embodiment, the control module 20 is used to receive a zero-crossing detection signal sent by the zero-crossing detection module 10 and the travel position information of the drying rod assembly in the clothes dryer sent by the position detection module; based on the received zero-crossing detection signal, it determines the power supply status of the mains power; when the power supply status is power outage, it detects whether the mains power is restored within a preset time threshold; if so, it generates a target lifting control command based on the travel position information, and controls the clothes dryer to perform lifting operation based on the target lifting control command.

[0059] Preferably, the zero-crossing detection signal is a square wave signal.

[0060] Specifically, the input terminal of the control module 20 is the AC_Zero pin.

[0061] Specifically, the control module 20 is used to determine the mains power supply status based on the received zero-crossing detection signal by detecting the level status of the AC_Zero pin. When the level status is detected to be a first level, the control module records the duration of the first level within the signal period. The level status is obtained based on the input of the zero-crossing detection module to the target pin. When the duration of the first level is greater than a preset first level time threshold, the control module determines that the mains power supply status is off; otherwise, the control module determines that the mains power supply status is normal.

[0062] Preferably, when the detected continuous first level is greater than 15ms and less than 0.5s, the mains power supply status is determined to be a short-term power outage.

[0063] Specifically, the control module 20 is used to generate a target lifting control command based on the travel position information. When the travel position information is between the upper limit and the preset first position, it generates a target lowering control command and controls the clothes drying machine to perform a lowering operation based on the target lowering control command. When the travel position information is between the preset first position and the lower limit, it generates a target rising control command and controls the clothes drying machine to perform a rising operation based on the target rising control command.

[0064] In one embodiment, when the clothes dryer only supports remote control, the user will be unable to operate the clothes dryer if the remote control is lost or the battery is depleted. This application addresses this by setting a zero-crossing detection circuit, allowing the clothes dryer to operate even without a remote control. The zero-crossing detection module 10 connects to the mains power supply module of the clothes dryer, performing zero-crossing detection on the mains power supply to capture the zero-crossing point of the AC power. The detected zero-crossing detection signal is converted and safely transmitted to the control module 20 via a voltage divider subunit 1021, a protection subunit 1022, and an optocoupler subunit 1023. The control module 20 then determines the mains power supply status based on the received zero-crossing detection signal. If there is a brief power outage and subsequent power restoration, the control module generates lifting control commands for the clothes dryer based on the dryer's travel position information. This provides a method for users to operate the clothes dryer when the remote control is unavailable. Furthermore, electrical isolation and filtering protection enhance the circuit's safety and reliability, thereby improving the clothes dryer's intelligence level and user experience. Even when the remote control is unusable, the normal operation of the clothes dryer is ensured.

[0065] In one embodiment, the lifting control system for a clothes drying rack provided in this application further includes a power conversion module 30.

[0066] In one embodiment, the power conversion module 30 is connected to the zero-crossing detection module 10 and the control module 20 respectively, and is used to supply power to the zero-crossing detection module 10 and the control module 20.

[0067] In one embodiment, the power conversion module 30 includes a step-down conversion unit 301, an energy storage unit 302, and a power output unit 303. The output terminal of the step-down conversion unit 301 is connected to the input terminal of the energy storage unit 302, the output terminal of the energy storage unit 302 is connected to the power output unit 303, and the power output unit 303 is connected to the DC power input unit 103.

[0068] In one embodiment, the power conversion module 30 further includes a 12V power input unit 304; wherein the 12V power input unit 304 is connected to the input terminal of the buck converter 301; as shown Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of a power conversion module according to one embodiment of this application.

[0069] Specifically, the power output unit 303 outputs a voltage of 5V.

[0070] Specifically, the step-down converter 301 efficiently steps down the 12V input voltage to 5V and outputs it through the power output unit 303 to provide a stable low-voltage power supply for the control module 20 and peripheral circuits.

[0071] Specifically, the step-down conversion unit 301 includes a step-down chip U5, and the energy storage unit 302 includes an energy storage capacitor EC14.

[0072] Specifically, the first pin of the step-down chip U5 is connected to the 12V power input unit 304, the fourth pin of the step-down chip U5 and the power output unit 303 are respectively connected to the positive terminal of the energy storage capacitor EC14, and the negative terminal of the energy storage capacitor EC14 and the second pin of the step-down chip U5 are respectively grounded.

[0073] Specifically, since the positive terminal of the energy storage capacitor EC14 is directly connected to the fourth pin of the step-down chip U5 and the power output unit 303, when the mains power is normal, the step-down chip U5 converts the input 12V voltage into a stable 5V output, which is directly applied to the positive terminal of the energy storage capacitor EC14 to charge the energy storage capacitor EC14.

[0074] Specifically, the negative terminal of the energy storage capacitor EC14 is grounded and its positive terminal is connected to the power output unit 303 to form a complete energy storage discharge circuit. When the mains power or 12V input is unexpectedly interrupted, the energy storage capacitor EC14 supplies power to the control module 20 through this energy storage discharge circuit to achieve short-term capacitor failure and avoid operation interruption or data loss.

[0075] In one embodiment, the power conversion module 30 further includes a second filtering unit 305 and a third filtering unit 306; wherein, the first end of the second filtering unit 305 is connected to the buck converter 301, the second end of the second filtering unit 305 is connected to the input end of the energy storage unit 302 and the first end of the third filtering unit 306 respectively, and the second end of the third filtering unit 306 is connected to the output end of the energy storage unit 302; Figure 6 As shown, Figure 6 This is another structural schematic diagram of a power conversion module according to an embodiment of this application.

[0076] Specifically, the second filter unit 305 includes a first inductor L3; the third filter unit 306 includes a second filter capacitor C12; wherein, the first end of the first inductor L3 is connected to the fifth pin of the step-down chip U5, the second end of the first inductor L3 is connected to the positive terminal of the energy storage capacitor EC14 and the first end of the second filter capacitor C12, the second end of the second filter capacitor C12 is connected to the negative terminal of the energy storage capacitor EC14, and the first end of the second filter capacitor C12 is connected to the power output unit 303.

[0077] Specifically, the first inductor L3 is connected in series between the fifth pin of the buck converter chip U5 and the energy storage capacitor EC14, forming an LC low-pass filter network. When the load changes instantaneously, the first inductor L3 slows down the current rise rate by impeding the current surge, thus preventing a significant drop in power supply voltage. At the same time, the second filter capacitor C12 compensates for the instantaneous current demand through rapid charging and discharging, maintaining stable output voltage. Furthermore, the addition of the first inductor L3 isolates the charging and discharging path of the energy storage capacitor EC14 from high-frequency noise, reducing the heat generation and lifespan loss of the capacitor caused by high-frequency charging and discharging, and improving energy storage efficiency.

[0078] In one embodiment, the power conversion module 30 includes a step-down conversion unit 301 and an energy storage unit 302. It can not only provide a stable power supply when the mains power is normal, but also provide temporary power support through the energy storage capacitor EC14 when the mains power is unexpectedly interrupted, so as to maintain the operation of the circuit and prevent operation interruption or data loss caused by power failure. In addition, the presence of the second filter unit 305 and the third filter unit 306 improves the stability of the power supply and reduces the impact of voltage fluctuations and electromagnetic interference, thereby enhancing the reliability and durability of the clothes drying rack and ensuring that the clothes drying rack can work normally under various conditions.

[0079] In one embodiment, the power output unit 303 of the power conversion module 30 is connected to the DC power input unit 103 of the zero-crossing detection module 10. The power output unit 303 is used to output the processed 5V voltage to the DC power input unit 103 of the zero-crossing detection module 10, thereby realizing the closed loop of the zero-crossing detection module 10.

[0080] Specifically, when the mains power is normal, the 12V voltage is converted to 5V by the step-down conversion unit 301. Part of it directly powers the zero-crossing detection module 10 and the control module 20 through the power output unit 303, and the other part charges the energy storage unit 302, so that the energy storage capacitor EC14 stores enough energy. When there is a sudden power failure, the energy storage unit 302 immediately releases energy through the discharge circuit to maintain the 5V output for more than 1 second, ensuring that the control module 20 can still detect the mains power recovery status and execute the step-up and step-down control logic after a short power failure, thus avoiding system function interruption due to power failure.

[0081] Figure 7 This application provides a structural schematic diagram of a clothes drying rack; such as... Figure 7 As shown, the clothes drying rack includes the lifting control system 200 described above.

[0082] In one embodiment, the clothes drying rack further includes a mains power access module 100.

[0083] In one embodiment, the mains power access module 100 is connected to the lifting control system 200.

[0084] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0087] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0090] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0091] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered 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 lifting control system for a clothes drying rack, characterized in that, Includes a zero-crossing detection module and a control module; The input terminal of the zero-crossing detection module is connected to the mains power input module of the clothes drying machine, and is used to perform zero-crossing detection on the mains power connected to the clothes drying machine. The signal input terminal of the control module is connected to the output terminal of the zero-crossing detection unit, and is used to receive the zero-crossing detection signal sent by the zero-crossing detection module, and control the clothes drying machine to perform lifting and lowering actions according to the zero-crossing detection signal.

2. The lifting control system for a clothes drying rack as described in claim 1, characterized in that, The zero-crossing detection module includes an optical coupling unit and a DC power input unit. The input terminal of the optical coupling unit is connected to the output terminal of the AC power access module of the clothes dryer. The output terminals of the optical coupling unit and the DC power input unit are respectively connected to the signal input terminal of the control module.

3. The lifting control system for a clothes drying rack as described in claim 2, characterized in that, Also includes: Power conversion module; The power conversion module is connected to the zero-crossing detection module and the control module respectively, and is used to supply power to the zero-crossing detection module and the control module.

4. The lifting control system for a clothes drying rack as described in claim 3, characterized in that, The power conversion module includes a step-down conversion unit, an energy storage unit, and a power output unit.

5. The lifting control system for a clothes drying rack as described in claim 4, characterized in that, The output terminal of the step-down converter is connected to the input terminal of the energy storage unit, the output terminal of the energy storage unit is connected to the power output unit, and the power output unit is connected to the DC power input unit.

6. The lifting control system for a clothes drying rack as described in claim 2, characterized in that, The optical coupling unit includes a voltage divider subunit, a protection subunit, and an optical coupling subunit.

7. The lifting control system for a clothes drying rack as described in claim 6, characterized in that, The first end of the voltage divider subunit is connected to the first mains power input pin, the second end of the voltage divider subunit is connected to the first end of the protection subunit, the second end of the protection subunit and the second mains power input pin are respectively connected to the input end of the optocoupler subunit, and the output end of the optocoupler subunit is connected to the signal input end of the control module.

8. The lifting control system for a clothes drying rack as described in claim 1, characterized in that, The input terminals of the zero-crossing detection module include a first mains power input pin and a second mains power input pin; The first AC power input pin is connected to the AC power live wire, and the second AC power input pin is connected to the AC power neutral wire.

9. The lifting control system for a clothes drying rack as described in claim 1, characterized in that, Also includes: Position detection module; The position checking module is connected to the control module and is used to detect the travel position information of the drying rod assembly in the clothes drying machine, so that after receiving the zero-crossing detection signal, the control module controls the drying rod assembly to perform an upward or downward action based on the travel position information of the drying rod assembly.

10. A clothes drying rack, characterized in that, The lifting control system includes any one of claims 1-9.

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