Indicator lamp control circuit, control system and clothes airing machine

Abstract

The utility model relates to an indicating lamp control circuit, a control system and a clothes airing machine, the indicating lamp circuit is used for the clothes airing machine, the indicating lamp circuit comprises a main control module, a switching module, a first indicating lamp module and a second indicating lamp module, and the signal input end of the main control module is used for receiving operation state signals of the intelligent clothes airing machine; the signal output end of the main control module is connected with the first indicator light module and the second indicator light module through the switching module; wherein the main control module is used for controlling the working states of the first indicating lamp module and the second indicating lamp module through the switching module, and the switching module is used for selectively connecting the first indicating lamp module or the second indicating lamp module according to a light control signal output by the main control module. According to the utility model, the main control module controls the working states of the first indicator lamp and the second indicator lamp through the switching module and controls different light effects, thereby satisfying diversified light effect display of the state of the clothes airing machine.

Description

Technical Field

[0001] This utility model relates to the technical field of intelligent clothes drying racks, and in particular to an indicator light control circuit, a control system, and a clothes drying rack. Background Technology

[0002] With the development of smart homes, smart clothes drying racks have gradually entered thousands of households. Currently, most smart clothes drying racks on the market are equipped with operation status indicator lights. However, most indicator lights in existing technology use a single indicator light effect. For example, if a dual-color indicator light is used, it can only reflect the two operating states of the clothes drying rack, namely power on and standby, through the color of the light. It cannot reflect different working states of the clothes drying rack, such as lifting, abnormal operation, etc.

[0003] Existing technology cannot control the indicator lights of smart clothes drying racks with multiple lighting effects. Users need to observe the effect of a single indicator light to judge the operating status of the clothes drying rack. Moreover, the number of states that can be displayed is limited, and the status feedback effect is poor, which brings inconvenience to the user experience. In addition, the existing indicator light control circuit also has problems such as complex circuit structure, many components, and many occupied ports, resulting in a large indicator light board size, which is not conducive to the slim design of smart clothes drying racks. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an indicator light control circuit, a control system, and a clothes drying rack, which can switch between various lighting effects according to different operating states of the clothes drying rack, and also provides two indicator light groups to meet the personalized choices of users.

[0005] In a first aspect, this utility model provides an indicator light control circuit for a clothes drying rack, comprising: a main control module, a switching module, a first indicator light module, and a second indicator light module;

[0006] The signal input terminal of the main control module is used to receive the operating status signal of the smart clothes drying machine; the signal output terminal of the main control module is connected to the first indicator light module and the second indicator light module through the switching module; wherein, the main control module is used to control the working status of the first indicator light module and the second indicator light module through the switching module, and the switching module is used to select to connect the first indicator light module or the second indicator light module according to the control signal output by the main control module.

[0007] In one possible implementation, the switching module includes a first on-resistance and a second on-resistance, and the first indicator module is connected to the signal output terminal of the switching module through the first on-resistance;

[0008] Alternatively, the second indicator module can be connected to the signal output terminal of the switching module via the second on-resistor.

[0009] In one possible implementation, the first indicator module includes a first driving circuit and a first indicator group; the first driving circuit includes a switching transistor and a first current-limiting resistor, and the first indicator group includes a plurality of first indicator lights;

[0010] The first input terminal of the switching transistor is used to receive the lighting control signal sent by the main control module. The signal output terminal of the switching module is connected to the first input terminal of the switching transistor through the first current limiting resistor. The first connection terminal of the switching transistor is connected to the first indicator light group. The second connection terminal of the switching transistor is grounded. The first indicator lights are connected in parallel with each other. The anode of the first indicator light is connected to the power supply. The cathode of the first indicator light is connected to the first connection terminal of the switching transistor.

[0011] In one possible implementation, the first indicator circuit further includes a second current-limiting resistor, and the first input terminal of the switching transistor is also grounded through the second current-limiting resistor.

[0012] In one possible implementation, the second indicator module includes an indicator control chip, a third current-limiting resistor, a third on-resistor, and a second indicator group, wherein the second indicator group includes a plurality of second indicator lights.

[0013] The signal input pin of the indicator light control chip is used to receive the light control signal sent by the main control module, and the signal output terminal of the switching module is connected to the signal input pin of the indicator light control chip.

[0014] The signal output pin of the indicator control chip is connected to the signal input pin of the next second indicator through the third current limiting resistor. The second indicator is cascaded in sequence, and the signal output pin of the second indicator is connected to the signal input pin of the next second indicator. The power supply pins of the second indicator are connected to the power supply through the third on-resistor, and the ground pins of the second indicator are grounded.

[0015] In one possible implementation, the second indicator module further includes a first pull-up resistor and a first capacitor. The signal input pin of the indicator control chip is connected to the power supply through the first pull-up resistor, and the signal input pin of the indicator control chip is also grounded through the first capacitor.

[0016] In one possible implementation, a status detection module is further included, the signal output terminal of which is connected to the signal input terminal of the main control module; the status detection module includes a stroke drive circuit and a current sampling circuit; the stroke drive circuit is used to drive the clothes dryer to move upward and / or downward, and send the clothes dryer status signal to the main control module; the current sampling circuit is used to collect the operating current of the smart clothes dryer.

[0017] In one possible implementation, a filtering circuit is also included. The signal output terminal of the main control module is connected to the switching module through the filtering circuit. The filtering circuit includes a first filtering capacitor, a second filtering capacitor, and a first filtering resistor.

[0018] The first pin of the signal input terminal of the switching module is connected to the power supply. The power supply is connected to the second pin of the signal input terminal of the switching module through the first filter capacitor. The power supply is also grounded through the first filter capacitor. The signal output terminal of the main control module is connected to the third pin of the signal input terminal of the switching module through the first filter resistor, and is grounded through the first filter resistor and the second filter capacitor.

[0019] Secondly, this utility model provides an indicator light control system, including the indicator light control circuit as described in any one of the above.

[0020] Thirdly, this utility model provides a clothes drying rack, including an indicator light control circuit as described in any of the above.

[0021] The indicator light control circuit provided by this utility model obtains the operating status of the smart clothes dryer through the status detection module and sends the operating status signal to the main control module. The main control module receives the operating status signal of the clothes dryer and sends the corresponding light control signal according to the operating status signal. After being filtered by the filtering circuit, the corresponding indicator light is controlled to emit a variety of lighting effects according to the indicator light module connected to the switching module, so as to indicate the operating status of the clothes dryer and improve the user experience.

[0022] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the indicator light control circuit in one embodiment of the present invention;

[0024] Figure 2 This is a structural diagram of the signal output terminal of the switching module in one embodiment of the present invention;

[0025] Figure 3 This is a structural diagram of the first indicator light module in one embodiment of the present invention;

[0026] Figure 4 This is a structural diagram of the second indicator module in one embodiment of the present invention;

[0027] Figure 5 This is a structural diagram of a filter circuit in one embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be described in further detail below with reference to the accompanying drawings.

[0029] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Furthermore, in the description of this application, unless otherwise stated, "several" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] PWM (Pulse Width Modulation) dimming is a technique that controls the brightness of LED lights or other light sources. PWM dimming adjusts the brightness by changing the ratio of the light source's on and off times, allowing for precise brightness control and energy savings.

[0034] Please see Figure 1 , Figure 1 This is a schematic diagram of an indicator light control circuit in one embodiment of the present invention.

[0035] In a first aspect, this utility model provides an indicator light control circuit, including a main control module 2, a switching module 3, a first indicator light module 4, and a second indicator light module 5;

[0036] The signal input terminal of the main control module 2 is used to receive the operating status signal of the smart clothes drying machine; the signal output terminal of the main control module 2 is connected to the first indicator light module 4 and the second indicator light module 5 through the switching module 3; wherein, the main control module 2 is used to control the working status of the first indicator light module 4 and the second indicator light module 5 through the switching module 3, and the switching module 3 is used to select to connect the first indicator light module 4 or the second indicator light module 5 according to the control signal output by the main control module 2.

[0037] The main control module 2 can be a hardware unit that undertakes core control functions, such as a microcontroller. The main control module 2 controls the connection or disconnection of the first indicator light module and the second indicator light module by outputting control signals, thereby controlling the corresponding changes in operating status. In addition, the main control module 2 acquires and analyzes the operating status signal of the smart clothes dryer, and generates a corresponding lighting control signal based on preset control logic, which is output to the indicator light module to control the corresponding indicator light to emit lighting effects. In one embodiment, the lighting control signal is a PWM signal.

[0038] In one embodiment, the main control module 2 includes a processor and a memory. The memory stores a mapping table for lighting effect control. The mapping table is used to define the correspondence between different operating states of the smart clothes dryer and PWM duty cycle and flashing frequency. The processor parses the operating state signal and calls the mapping table to generate a lighting control signal with specific timing logic, thereby controlling the lighting effect of the indicator light.

[0039] The main control module 2 is a module that can receive and parse the operating status signal of the smart clothes drying machine, and generate and send light control signals based on the operating status signal. The circuit structure of the main control module is not specifically limited here.

[0040] The switching module 3 is used to connect the indicator light module that needs to be controlled for lighting effects. The indicator light module includes a first indicator light module 4 and a second indicator light module 5. The first indicator light module 4 and the second indicator light module 5 are respectively connected to the signal output terminal of the switching module 3 to receive the lighting control signal sent by the main control module.

[0041] Please see Figure 2 , Figure 2This is a structural diagram of the signal output terminal of the switching module in one embodiment of the present invention. In one embodiment, the switching module 3 includes a first on-resistance R1 and a second on-resistance R2, and the first indicator light module 4 is connected to the signal output terminal of the switching module 3 through the first on-resistance R1; or, the second indicator light module 5 is connected to the signal output terminal of the switching module 3 through the second on-resistance R2.

[0042] In this embodiment, the first on-resistance R1 and the second on-resistance R2 are 0-ohm resistors. Depending on the user's selection, one of the first indicator light module and the second indicator light module is connected to the signal output terminal of the switching module. The circuit is turned on through the on-resistance, so that the control signal is transmitted to the corresponding indicator light module for control. The indicator light group can be selected according to the user's needs to meet the user's personalized needs and improve the user experience.

[0043] In one embodiment, the switching module 3 may further include a switching control circuit, which is disposed at the signal output terminal of the switching module and connected to the first indicator light module and the second indicator light module respectively. The switching control circuit may be a combination of a MOSFET switch and a microcontroller, or any other circuit structure combination capable of switching between on and off states; no further limitations are imposed here. This embodiment selects the indicator light group for control by controlling the on and off states of the first and second indicator light modules, thus enabling free switching of the light groups during the operation of the intelligent clothes drying rack.

[0044] Please see Figure 3 , Figure 3 This is a structural diagram of a first indicator light module in one embodiment of the present invention. The first indicator light module 4 includes a first driving circuit and a first indicator light group; the first driving circuit includes a switching transistor Q1 and a first current-limiting resistor R6, and the first indicator light group includes a plurality of first indicator lights.

[0045] The first input terminal of the switching transistor Q1 is used to receive the lighting control signal sent by the main control module 2. The signal output terminal of the switching module 3 is connected to the first input terminal of the switching transistor Q1 through the first current limiting resistor R6. The first connection terminal of the switching transistor Q1 is connected to the first indicator light group, and the second connection terminal of the switching transistor Q1 is grounded. The first indicator lights are connected in parallel with each other. The anode of the first indicator light is connected to the power supply, and the cathode of the first indicator light is connected to the first connection terminal of the switching transistor Q1.

[0046] In one embodiment, the first indicator circuit further includes a second current-limiting resistor R7, and the first input terminal of the switching transistor Q1 is also grounded through the second current-limiting resistor R7.

[0047] In this embodiment, the input terminal of the first driving circuit is connected to the signal output terminal of the switching module to receive lighting control signals. The first indicator light group is connected to the first driving circuit, and the first driving circuit outputs control signals to the first indicator light group for lighting effect control. In one embodiment, the switching transistor Q1 is an NPN transistor. The base of the NPN transistor is connected to the signal output terminal of the switching module through the first current-limiting resistor. The emitter of the NPN transistor is grounded, and the collector of the NPN transistor is connected to the first indicator light module. The collector of the NPN transistor is connected to a power supply, which provides 5V power to the first indicator light module.

[0048] The first indicator light group includes a plurality of first indicator lights, each of which is a monochrome light and can be any color (e.g., white, yellow, etc.), which is not limited herein. In one embodiment, the number of first indicator lights is three.

[0049] In this embodiment, the switching module is connected to the first indicator light module through the first on-resistor and is powered by a 5V power supply. The main control module sends a 5V signal to the first input terminal of the switching transistor through the switching module, so that the switching transistor is turned on and the first indicator light group lights up; when a 0V signal is sent, the switching transistor is turned off and the first indicator light group is turned off. The first indicator light module turns on, turns off, or flashes according to the received light control signal to indicate the operating status of the smart clothes drying machine.

[0050] Please see Figure 4 , Figure 4 This is a structural diagram of the second indicator module in one embodiment of the present invention. The second indicator module 5 includes an indicator control chip U1, a third current-limiting resistor R9, a third on-resistance R10, and a second indicator group, wherein the second indicator group includes a plurality of second indicator lights.

[0051] The signal input pin of the indicator light control chip U1 is used to receive the light control signal sent by the main control module 2, and the signal output terminal of the switching module 3 is connected to the signal input pin of the indicator light control chip U1.

[0052] The signal output pin of the indicator control chip U1 is connected to the signal input pin of the first second indicator through the third current limiting resistor R9. The second indicators are cascaded in sequence, and the signal output pin of the second indicator is connected to the signal input pin of the next second indicator. The power supply pins of the second indicators are connected to the power supply through the third on-resistance R10, and the ground pins of the second indicators are grounded.

[0053] In one embodiment, the second indicator module 5 further includes a first pull-up resistor R8 and a first capacitor C3. The signal input pin of the indicator control chip U1 is connected to the power supply through the first pull-up resistor R8, and the signal input pin of the indicator control chip U1 is also grounded through the first capacitor C3.

[0054] The signal input pin of the indicator light control chip is connected to the signal output terminal of the switching module through the second on-resistor to receive the lighting control signal. The main control module sends the lighting control signal to the indicator light control chip through the switching module. The indicator light control chip adjusts the electrical signal output to the second indicator light group according to the lighting control signal to achieve dimming of the second indicator light group and switching between various lighting effects. In one embodiment, the indicator light control chip is a CMS32L051 chip. However, the indicator light control chip can also be other chips that can dim the indicator light group according to the PWM signal, and this is not limited here.

[0055] The signal input pins of the indicator light control chip are connected to the power supply through the first pull-up resistor and grounded through the first capacitor. The first pull-up resistor clamps the signal at a high level and provides current limiting to improve circuit stability. The first capacitor is used to filter out high-frequency interference signals in the circuit. The second indicator light module is connected to the power supply, which provides 5V power to the second indicator light module.

[0056] The second indicator light group includes a plurality of second indicator lights, which are RGB lights. In one embodiment, the number of second indicator lights is three.

[0057] In this embodiment, the switching module is connected to the indicator control chip of the second indicator module through the second on-resistor. The indicator control chip is powered by a 5V power supply. The main control module sends a lighting control signal to the indicator control chip through the switching module. The second indicator lights are connected to the power supply through the third on-resistor and are powered by the power supply at 5V. The indicator control chip outputs high and low level signals according to the PWM signal, so that the second indicator group presents a variety of lighting effects.

[0058] In one embodiment, the circuit further includes a status detection module 1, the signal output terminal of which is connected to the signal input terminal of the main control module 2; the status detection module 1 includes a stroke drive circuit and a current sampling circuit; the stroke drive circuit is used to drive the clothes dryer to move upward and / or downward, and send a clothes dryer status signal to the main control module 2; the current sampling circuit is used to collect the operating current of the smart clothes dryer.

[0059] The travel drive circuit drives the clothes dryer to perform lifting and lowering operations. In one embodiment, a remote control is also included, connected to the travel drive circuit. The user controls the clothes dryer's lifting and lowering by triggering the upward and downward operations using the remote control. The remote control can be wired, wireless network, or Bluetooth connected, and drives the clothes dryer to lift and lower by sending control signals. The circuit structure of the travel drive circuit and the connection method of the remote control can adopt existing technologies and are not specifically limited here.

[0060] In one embodiment, the system may further include at least one sensor, such as a position sensor, connected to the main control module. The position sensor detects the relative displacement of the clothesline to determine if movement has occurred and sends the operating status information obtained through the position sensor to the main control module, thereby controlling the indicator light to display the corresponding lighting effect. In other embodiments, the sensor may also be a speed sensor, a Hall effect sensor, or other sensor capable of detecting that the smart clothes dryer is in the lifting or lowering process. When the smart clothes dryer is in the lifting or lowering process, the indicator light displays a low-frequency flashing effect. The brightness and flashing frequency of the indicator light are set by the user or use system-preset lighting effect settings.

[0061] In this embodiment, the lifting and lowering operation status of the smart clothes drying rack is obtained by setting a stroke drive circuit or a sensor, and the status signal is sent to the main control module, so that the main control module generates a corresponding light control signal, thereby causing the indicator light to emit corresponding lighting effects according to the operation status of the smart clothes drying rack.

[0062] The current sampling circuit is used to detect the operating current of the smart clothes dryer. In one embodiment, the current sampling circuit may include a current sensor, which is used to monitor the operating current of the motor of the smart clothes dryer in real time. When the motor drives the clothes drying rod to rise and fall, as the weight of the smart clothes dryer increases, the motor requires greater torque, thus requiring a higher operating current. By detecting the real-time operating current of the clothes dryer, it is determined whether the weight of the smart clothes dryer is too heavy. The main control module then sends a corresponding light control signal based on the current value, causing the indicator light group to display corresponding lighting effects to provide an overload warning to the user. The smart clothes dryer sets an operating current range value according to the weight range under normal working conditions. When the operating current exceeds the operating current range value, it is determined that the smart clothes dryer is overloaded. In one embodiment, when the smart clothes dryer triggers an overload warning, the indicator light displays a high-frequency flashing effect. This embodiment does not specifically limit the brightness and flashing frequency of the indicator light.

[0063] In this embodiment, the operating current of the smart clothes drying rack is collected by a current sampling circuit and sent to the main control module. The main control module determines whether the clothes drying rack is overloaded based on the operating current. If the clothes drying rack is detected to be overloaded, a light control signal is sent to control the indicator light to flash, thereby providing an overload warning to the user.

[0064] Please see Figure 5 , Figure 5 This is a structural diagram of a filtering circuit in one embodiment of the present invention. The circuit further includes a filtering circuit, and the signal output terminal of the main control module 2 is connected to the switching module 3 through the filtering circuit. The filtering circuit includes a first filtering capacitor C17, a second filtering capacitor C18, and a first filtering resistor R18.

[0065] The first pin of the signal input terminal of the switching module 3 is connected to the power supply. The power supply is connected to the second pin of the signal input terminal of the switching module 3 through the first filter capacitor C17. The power supply is also grounded through the first filter capacitor C17. The signal output terminal of the main control module 2 is connected to the third pin of the signal input terminal of the switching module 3 through the first filter resistor R17, and is grounded through the first filter resistor R17 and the second filter capacitor C18.

[0066] In this embodiment, a capacitor and a resistor are provided at the signal output port of the main control module. The first filter capacitor, the second filter capacitor, and the filter resistor form an RC filter circuit to filter the lighting control signal output by the main control module, thereby filtering out interference components in the signal and improving signal quality and response speed.

[0067] This utility model provides an indicator light control circuit, which sequentially connects a signal detection module, a main control module, a switching module, and either a first indicator light module or a second indicator light module. The signal detection module detects the operating status signal of the clothes dryer. The main control module receives the operating status signal of the smart clothes dryer and generates a corresponding lighting control signal based on the operating status signal. The main control module controls the working state of the first and second indicator light modules through the switching module, ensuring that one of the indicator light modules is in a connected state. The main control module sends the lighting control signal to the corresponding indicator light module through the switching module, controlling the indicator light group in the indicator light module to display the corresponding lighting effect, thereby indicating the operating status of the smart clothes dryer. This achieves control of multiple lighting effects for the indicator lights of the smart clothes dryer, meeting diverse user needs. Furthermore, this application has a simple circuit structure, uses fewer components, and occupies fewer control ports, which is conducive to the thin and light design of the indicator light board, conforming to the development trend of thin and light smart clothes dryers.

[0068] Secondly, this utility model provides an indicator light control system, including the indicator light control circuit as described in the above embodiments.

[0069] The indicator light control system of this application embodiment can be applied to the lighting effect control of the indicator lights of smart clothes drying racks. Through this system, the indicator lights of the clothes drying rack can switch between various lighting effects according to different operating states, providing users with an intuitive experience.

[0070] Thirdly, this utility model provides a clothes drying rack, including the indicator light control circuit as described in the above embodiments.

[0071] The clothes drying rack in this embodiment uses the indicator light control circuit, which controls the indicator lights to emit diverse lighting effects according to the operating status of the clothes drying rack. It also supports switching between two sets of indicator light modules, thereby improving the user experience.

[0072] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An indicator light control circuit for a clothes drying rack, characterized in that, include: Main control module, switching module, first indicator light module, and second indicator light module; The signal input terminal of the main control module is used to receive the operating status signal of the smart clothes drying machine; the signal output terminal of the main control module is connected to the first indicator light module and the second indicator light module through the switching module; wherein, the main control module is used to control the working status of the first indicator light module and the second indicator light module through the switching module, and the switching module is used to select to connect the first indicator light module or the second indicator light module according to the control signal output by the main control module.

2. The indicator light control circuit according to claim 1, characterized in that, The switching module includes a first on-resistor and a second on-resistor, and the first indicator module is connected to the signal output terminal of the switching module through the first on-resistor. Alternatively, the second indicator module can be connected to the signal output terminal of the switching module via the second on-resistor.

3. The indicator light control circuit according to claim 1, characterized in that, The first indicator module includes a first driving circuit and a first indicator group; the first driving circuit includes a switching transistor and a first current-limiting resistor, and the first indicator group includes a plurality of first indicator lights; The first input terminal of the switching transistor is used to receive the lighting control signal sent by the main control module. The signal output terminal of the switching module is connected to the first input terminal of the switching transistor through the first current limiting resistor. The first connection terminal of the switching transistor is connected to the first indicator light group, and the second connection terminal of the switching transistor is grounded. The first indicator lights are connected in parallel with each other. The anode of the first indicator light is connected to the power supply, and the cathode of the first indicator light is connected to the first connection terminal of the switching transistor.

4. The indicator light control circuit according to claim 3, characterized in that, The first indicator light circuit also includes a second current-limiting resistor, and the first input terminal of the switching transistor is also grounded through the second current-limiting resistor.

5. The indicator light control circuit according to claim 1, characterized in that, The second indicator module includes an indicator control chip, a third current-limiting resistor, a third on-resistor, and a second indicator group, wherein the second indicator group includes a plurality of second indicator lights; The signal input pin of the indicator light control chip is used to receive the light control signal sent by the main control module, and the signal output terminal of the switching module is connected to the signal input pin of the indicator light control chip. The signal output pin of the indicator control chip is connected to the signal input pin of the first second indicator through the third current-limiting resistor. The second indicators are cascaded in sequence, and the signal output pin of the second indicator is connected to the signal input pin of the next second indicator. The power supply pins of the second indicators are connected to the power supply through the third on-resistor, and the ground pins of the second indicators are grounded.

6. The indicator light control circuit according to claim 5, characterized in that, The second indicator module also includes a first pull-up resistor and a first capacitor. The signal input pin of the indicator control chip is connected to the power supply through the first pull-up resistor, and the signal input pin of the indicator control chip is also grounded through the first capacitor.

7. The indicator light control circuit according to claim 1, characterized in that, It also includes a status detection module, the signal output terminal of which is connected to the signal input terminal of the main control module; the status detection module includes a stroke drive circuit and a current sampling circuit; the stroke drive circuit is used to drive the clothes dryer to move upward and / or downward and send the clothes dryer status signal to the main control module; the current sampling circuit is used to collect the operating current of the smart clothes dryer.

8. The indicator light control circuit according to claim 1, characterized in that, It also includes a filtering circuit, and the signal output terminal of the main control module is connected to the switching module through the filtering circuit. The filtering circuit includes a first filtering capacitor, a second filtering capacitor, and a first filtering resistor. The first pin of the signal input terminal of the switching module is connected to the power supply. The power supply is connected to the second pin of the signal input terminal of the switching module through the first filter capacitor. The power supply is also grounded through the first filter capacitor. The signal output terminal of the main control module is connected to the third pin of the signal input terminal of the switching module through the first filter resistor, and is grounded through the first filter resistor and the second filter capacitor.

9. An indicator light control system, characterized in that, Includes the indicator light control circuit as described in any one of claims 1-8.

10. A clothes drying rack, characterized in that, Includes the indicator light control circuit as described in any one of claims 1-8.

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