Anti-scalding protection methods, systems, and clothes drying racks with bottom-mounted drying units

Abstract

This invention provides a scalding protection method, system, and clothes drying rack with a bottom-mounted drying component. The scalding protection method includes the following steps: acquiring the upper limit signal of the drying rod assembly, determining whether the drying rod assembly is at the upper limit position; if not, locking the drying function; if so, unlocking the drying function; reading the drying function's start signal, starting the drying function, and locking the drying rod assembly's descent function; reading the drying function's stop signal, stopping the heating function, and entering the cooling mode; starting the fan function's running timer, maintaining the fan function's operation and locking the drying rod assembly's descent function; when the fan function's running time reaches T, stopping the fan function, ending the cooling mode, and unlocking the drying rod assembly's descent function. Its advantage is that, through a first-level lockout, a cooling mode, and a second-level lockout, it prevents users from being scalded by the bottom-mounted drying component.

Description

Technical Field

[0001] This invention relates to an electric lifting clothes drying rack, and more particularly to a method, system, and clothes drying rack with a bottom-mounted drying component for preventing scalding. The drying component of this electric lifting clothes drying rack can dry the clothes with warm air from below, thereby improving drying efficiency. Background Technology

[0002] Most electric clothes drying racks with drying functions on the market have their drying components located on the main unit. When clothes are hung on the drying rod assembly below the main unit, the drying component blows warm air from top to bottom to dry the damp clothes. This solves the problem of clothes being difficult to dry in the sun during the rainy season in southern China and is loved by many consumers.

[0003] However, due to the airflow circulation principle of "hot air rises and cold air sinks," the drying method of blowing warm air from top to bottom to dry clothes, with the drying component mounted on the main unit, is energy-intensive and inefficient. Therefore, clothes drying racks with bottom-mounted drying components have emerged.

[0004] For example, the invention patent with authorization announcement number CN108342887B discloses a drying module bottom-mounted connection mechanism and a clothes drying machine, which includes a clothes rack and a drying module. The drying module is suspended below the clothes rack through a telescopic component. The main unit is fixedly installed on the ceiling of an indoor balcony and connected to a household power supply. The clothes rack is located below the main unit. The motor drives the drum to rotate and retract the steel wire rope to realize the function of raising and lowering the clothes rack. The drying module suspended below the clothes rack rises and falls together with the clothes rack.

[0005] For example, a clothes drying rack with a bottom-mounted drying component, authorized by announcement number CN219099618U, includes a main unit, a clothes rack, and a drying component. The clothes rack includes two horizontally arranged clothes drying rods and a middle drying rod. The drying component is arranged below the middle drying rod and is connected to the middle drying rod through a cantilever assembly. The drying component includes a drying pipe, a fan, and a heating module. The fan is used to deliver air, and the heating module is used to heat the delivered air into warm air.

[0006] With the introduction of the aforementioned bottom-mounted drying racks to the market, some issues requiring improvement have gradually emerged during use. For example, users are accustomed to turning off the drying function before collecting the dried clothes. However, even when the drying function is off, the bottom-mounted drying unit retains residual heat. The temperature at the air outlet during drying is typically between 40°C and 50°C, and when the drying unit uses a PTC heating element, the temperature can instantly reach as high as 80°C. Users often overlook this and directly lower the drying rack to collect the dried clothes. At this time, because the bottom-mounted drying unit descends along with the drying rack, users' legs and hands are very likely to come into contact with the still-heated drying unit when collecting the clothes, leading to burns and posing a certain safety risk. Summary of the Invention

[0007] Based on the existing bottom-mounted drying racks where residual heat remains in the drying unit after the drying function is turned off, posing a risk of burns to users who directly lower the drying rod to retrieve clothes, this invention provides a burn protection method for bottom-mounted drying racks, a burn protection system for implementing this method, and an electric lifting drying rack with this burn protection system. By using delayed heat dissipation and interlocking the lowering of the drying rod, the system ensures that the drying unit has fully dissipated heat and cooled to a safe temperature before the user can lower the drying rod to retrieve clothes.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a method for preventing scalding in a bottom-mounted drying unit clothes dryer, comprising the following steps:

[0009] Step S10: Obtain the upper limit signal of the drying rod assembly, determine whether the drying rod assembly is at the upper limit position. If not, lock the drying function, that is, lock the heating function and the fan function. If yes, unlock the drying function, that is, unlock the heating function and the fan function.

[0010] Step S20: Read the start signal of the drying function, start the drying function, that is, start the heating function and the fan function, and lock the lowering function of the drying rod assembly;

[0011] Step S30: Read the shutdown signal of the drying function, turn off the heating function, and enter the heat dissipation mode; start the running timer of the fan function, keep the fan function running and lock the lowering function of the drying rod assembly;

[0012] Step S40: When the running time of the fan function reaches T, the fan function is turned off, the heat dissipation mode ends, and the descent function of the drying rod assembly is unlocked.

[0013] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problem is: the running time T of the fan function when the heat dissipation mode is adjusted in real time according to the temperature of the drying component;

[0014] In step S30, when entering the heat dissipation mode, the temperature C1 of the drying component and the ambient temperature K are obtained;

[0015] Step S40 includes the following steps:

[0016] Step S41: Obtain the temperature C of the drying component every unit time T0. N The remaining operating time T of the fan function is calculated using the following formula. N :

[0017]

[0018] Step S42: Compare the operating time T of the fan function. N And the unit time T0, if T N If T > T0, then repeat step S41. If T N If ≤T0, then proceed to step S43;

[0019] Step S43: The fan function continues to operate. N Then, turn off the fan function, end the heat dissipation mode, and unlock the lowering function of the drying rod assembly.

[0020] Another technical solution adopted by the present invention to solve the above-mentioned technical problems is: an anti-scalding protection system for a bottom-mounted drying unit clothes dryer, used to implement the anti-scalding protection method for a bottom-mounted drying unit clothes dryer, including a power supply, a controller and a drying unit control circuit;

[0021] The power supply is used to power the controller and the control circuit of the drying component;

[0022] The drying component control circuit includes a heating control circuit and a fan control circuit;

[0023] The controller is electrically connected to the control circuit of the drying component, including:

[0024] The drying rod assembly lowering function unlocking module is used to lock the drying rod assembly lowering function when the drying function is turned on, that is, when the heating function and the fan function are turned on; and to unlock the drying rod assembly lowering function when the heat dissipation mode ends.

[0025] The heat dissipation module is used to start the running timer of the fan function when the heating function is turned off, to keep the fan function running, and to turn off the fan function when the running time of the fan function reaches T.

[0026] The drying function control module is used to control the opening and closing of the drying function by controlling the on and off of the drying component control circuit, that is, to control the opening and closing of the heating function and the fan function by controlling the on and off of the heating control circuit and the fan control circuit respectively.

[0027] The motor control module is used to control the raising and lowering of the drying rack assembly by controlling the operation of the motor.

[0028] Another preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: it further includes a driver; the power supply is also used to power the driver;

[0029] The controller is electrically connected to the drying component control circuit via the driver. The driver is used to transmit instructions from the controller and control the on / off state of the motor control circuit and the drying component control circuit, so as to control the raising and lowering of the drying rod assembly, and to control the opening and closing of the heating function and the fan function.

[0030] Another preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is that the controller further includes a temperature monitoring module;

[0031] The temperature monitoring module is used to acquire the temperature C1 of the drying component and the ambient temperature K when entering the heat dissipation mode, and to acquire the temperature C of the drying component once every unit time T0. N ;

[0032] The heat dissipation module is used to adjust the operating time T of the fan function in real time according to the temperature of the drying component obtained by the temperature monitoring module, and calculates the remaining operating time T of the fan function using the following formula. N :

[0033]

[0034] And used to compare the operating time T of the fan function. N and the unit time T0, until T N ≤T0, the fan function continues to operate for T N Then, turn off the fan function.

[0035] Another preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: it further includes a temperature monitoring circuit; the power supply is also used to power the temperature monitoring circuit;

[0036] The temperature monitoring circuit includes a drying component temperature monitoring circuit and an ambient temperature monitoring circuit;

[0037] The temperature monitoring circuit for the drying assembly includes a first thermistor, which changes its resistance according to changes in the surface temperature of the drying assembly. One end of the first thermistor is connected to the controller, and the controller's temperature monitoring module acquires the voltage of the first thermistor and converts it to digital to obtain the temperature C of the drying assembly. N ;

[0038] The ambient temperature monitoring circuit includes a second thermistor, which changes its resistance according to changes in ambient temperature. One end of the second thermistor is connected to the controller, and the temperature monitoring module of the controller is used to acquire the voltage of the second thermistor and obtain the ambient temperature K through analog-to-digital conversion.

[0039] Another preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is that it further includes an infrared temperature sensor;

[0040] The infrared temperature sensor is connected to the controller. The infrared temperature sensor collects the temperature of the drying assembly and the ambient temperature, and transmits this data to the controller. The controller's temperature monitoring module performs analog-to-digital conversion to obtain the temperature C of the drying assembly. N and ambient temperature (K).

[0041] Another preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is that the control circuit of the drying component is a relay control circuit;

[0042] The heating control circuit includes a first relay and a first control switch. The first control switch is connected to the fan interface, and the first relay is connected to the power supply and the controller. The drying function control module of the controller is used to control the power supply of the first relay to control the opening and closing of the first control switch, thereby controlling the opening and closing of the fan function.

[0043] The fan control circuit includes a second relay and a second control switch. The second control switch is connected to the heater interface, and the second relay is connected to the power supply and the controller. The drying function control module of the controller is used to control the power supply of the second relay to control the opening and closing of the second control switch, thereby controlling the heating function to be turned on or off.

[0044] Another technical solution adopted by the present invention to solve the above-mentioned technical problems is: a bottom-mounted drying unit clothes dryer, including a main unit, a lifting unit, a drying rod unit and a drying unit, as well as an anti-scalding protection system for the bottom-mounted drying unit clothes dryer;

[0045] The main unit is equipped with a motor, and the drying rod assembly is connected to the lower part of the main unit through the lifting assembly. The motor drives the lifting assembly to drive the drying rod assembly to rise and fall.

[0046] The drying assembly is connected below the drying rod assembly and can rise and fall with the drying rod assembly;

[0047] The drying assembly includes an air outlet, a heater, and a fan;

[0048] The heating control circuit is connected to the heater, and the fan control circuit is connected to the fan;

[0049] The motor control module of the controller controls the raising and lowering of the drying rack assembly by controlling the operation mode of the motor;

[0050] The drying function control module of the controller controls the start and stop of the heater and the fan by controlling the on and off of the heating control circuit and the fan control circuit;

[0051] In drying mode, both the heater and the fan are turned on, and the fan is used to blow air out from the air outlet after it has been heated by the heater.

[0052] In heat dissipation mode, the heater is turned off, while the fan is kept running. The fan is used to pass air through the heater and then send it out from the air outlet to reduce the temperature of the drying component.

[0053] Another preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: a power outlet is provided below the main unit, a power pin is provided on the drying rod assembly, and the power pin is electrically connected to the heater and fan of the drying assembly;

[0054] When the drying rod assembly rises to its upper limit, the power pin is inserted into the power socket to provide power for the operation of the drying assembly.

[0055] Compared with the prior art, the advantages of the present invention are as follows: In summary, the anti-scalding protection method for the bottom-mounted drying unit clothes dryer provided by the present invention, by setting a first-level lock, enables the bottom-mounted drying unit to unlock the drying function when it rises to the upper limit with the drying rod assembly. That is, the drying unit can only be turned on when it is in a safe position where it is not easy to be scalded. Furthermore, by setting a mutually cooperating heat dissipation mode and a second-level lock, the heat dissipation function is turned on when the drying function is turned off and the drying mode ends, and the heat dissipation mode is entered. When the residual heat of the drying unit is reduced to a safe temperature, the descent function of the drying rod assembly is unlocked, and the drying unit can then descend with the drying rod assembly, thereby effectively preventing the user from being scalded by the bottom-mounted drying unit during use.

[0056] The present invention provides an anti-scalding protection system for a bottom-mounted drying unit clothes dryer and a clothes dryer equipped with the system. The anti-scalding protection method for the bottom-mounted drying unit clothes dryer is executed and realized by a controller and control circuit. It has a high degree of integration and is conducive to the development of clothes dryers towards lightweight, miniaturization and intelligence. It also helps to reduce the cost of the protection system for the bottom-mounted drying unit clothes dryer. Attached Figure Description

[0057] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0058] Figure 1 A schematic diagram of a preferred embodiment of a bottom-mounted drying unit clothes dryer. Figure 1 ;

[0059] Figure 2 A schematic diagram of a preferred embodiment of a bottom-mounted drying unit clothes dryer. Figure 2 ;

[0060] Figure 3 A schematic diagram of a preferred embodiment of a bottom-mounted drying unit clothes dryer. Figure 3 ;

[0061] Figure 4 for Figure 3 A magnified view of a portion at point A;

[0062] Figure 5 A general block diagram of an anti-scalding protection system for a bottom-mounted drying unit clothes dryer according to a preferred embodiment;

[0063] Figure 6 A block diagram of the controller of the anti-scalding protection system for a bottom-mounted drying unit clothes dryer according to a preferred embodiment;

[0064] Figure 7 A flowchart illustrating a preferred embodiment of a scalding protection method for a bottom-mounted drying unit clothes dryer;

[0065] Figure 8 This is a circuit diagram of an anti-scalding protection system for a bottom-mounted drying unit clothes dryer according to a preferred embodiment.

[0066] Explanation of reference numerals in the attached drawings: 100 for a clothes drying rack with a bottom-mounted drying component, 110 for the main unit, 120 for the lifting component, 130 for the drying rod component, 140 for the drying component, 121 for the folding frame, 141 for the connecting rod, 200 for the anti-scalding protection system of the clothes drying rack with a bottom-mounted drying component, 210 for the controller, 220 for the drying component control circuit, 222 for the heating control circuit, 222 for the first relay, 240 for the first control switch, 241 for the fan interface, 242 for the second relay, 230 for the second control switch, 241 for the heater interface, 230 for the fan control circuit, 240 for the driver, 241 for the power supply socket, 242 for the power supply pin, 240 for the temperature monitoring circuit, 241 for the temperature monitoring circuit of the drying component, 242 for the ambient temperature monitoring circuit, 243 for the first thermistor, 11 for the first voltage divider resistor, 14 for the second thermistor, and 2 for the second voltage divider resistor. Detailed Implementation

[0067] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of the invention.

[0068] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. Similarly, terms such as "first" and "second" are only for the purpose of facilitating understanding and have no other directional meaning, and should not be regarded as limitations on this invention.

[0069] like Figures 1 to 4 The image shows a bottom-mounted drying unit clothes dryer 100 provided in this embodiment, including a main unit 110, a lifting assembly 120, a drying rod assembly 130, and a drying assembly 140. The main unit 110 is equipped with a motor (not shown in the figure), and the drying rod assembly 130 is connected to the bottom of the main unit 110 through the lifting assemblies 120 at both ends.

[0070] A motor drives the lifting assembly 120 to raise and lower the drying rack assembly 130. Specifically, the lifting assembly 120 includes a steel wire rope (not shown) and a folding frame 121. One end of the steel wire rope is wound on a reel (not shown), which is located inside the main unit 110, typically near the motor. The motor rotates forward or reverse to drive the reel to rotate forward or reverse, thus raising or lowering the steel wire rope. The folding frame 121 folds or unfolds as the drying rack assembly 130 rises or falls to maintain its stability.

[0071] The drying assembly 140 is connected to the lower part of the drying rod assembly 130 via connecting rods 141 at both ends. When the drying rod assembly 130 rises and falls, the drying assembly 140 can rise and fall with it. The drying assembly 140 includes an air outlet (not shown in the figure), a heater (not shown in the figure), and a fan (not shown in the figure). In drying mode, both the heater and the fan are turned on. The fan draws outside air into the drying assembly, and the air becomes warm air after being heated by the heater. It is then sent out from the air outlet to dry the clothes hanging on the drying rod assembly 130 above it. Therefore, it is called a "bottom-mounted" drying assembly clothes dryer.

[0072] For details on the specific installation and connection method of the bottom-mounted drying component 140 and the specific working method of the drying mode, please refer to the specific implementation method of the bottom-mounted connection mechanism of the drying module and the clothes drying machine disclosed in the invention patent with authorization announcement number CN108342887B, which will not be repeated here.

[0073] like Figure 1 The diagram shows the state where the drying rod assembly 130 is lowered and the connecting rod 141 is extended, causing the drying assembly 140 to suspend below the drying rod assembly 130. Since the lowering of the drying rod assembly 130 is intended to allow the user to reach the clothes hanging on it with their bare hands, the drying rod assembly 130 is approximately at the user's shoulder height at this point. The vertical distance between the drying assembly 140 and the drying rod assembly 130 must be at least greater than the length of the clothes; therefore, the drying assembly 140 is approximately at the user's leg level at this point.

[0074] It is conceivable that if the device is in drying mode, with both the heater and fan on, the surface temperature of the drying components would be very high, easily causing burns to the user. Therefore, a primary interlock is required to ensure that the drying function is only activated when the drying rod assembly 130 reaches its upper limit.

[0075] Furthermore, such as Figure 2 As shown, when the drying rod assembly 130 is at its upper limit, it enters the drying mode and activates the drying function. After the drying mode ends, if the heater and fan are turned off simultaneously, the surface of the drying assembly 140 still retains residual heat. At this time, if the user directly lowers the drying rod assembly 130 and collects the clothes, they are likely to be burned by the residual heat on the surface of the drying assembly 140. Therefore, it is necessary to set up a coordinated heat dissipation mode and a two-stage interlock to ensure that the residual heat of the drying assembly 140 is dissipated, and the drying rod assembly 130 can only be lowered after the heat dissipation function has ended.

[0076] Therefore, a scalding protection system 200 for a bottom-mounted drying unit is provided in the bottom-mounted drying unit clothes dryer 100 to implement the scalding protection method for a bottom-mounted drying unit clothes dryer provided by the present invention, so as to realize the aforementioned first-level lockout, heat dissipation mode and second-level lockout, and prevent the user from being scalded by the bottom-mounted drying unit 140 during use.

[0077] The anti-scalding protection system 200 of the bottom-mounted drying unit clothes dryer provided in this embodiment includes a power supply, a controller 210, and a drying unit control circuit 220. The power supply not only provides power for the motor's operation but also powers peripheral electrical components such as the controller 210 and the drying unit control circuit 220.

[0078] In this embodiment, the controller 210 is an MCU microcontroller, but other types of integrated chip controllers or microcomputers with processors can also be used. For ease of description and understanding, the following first introduces a preferred anti-scalding protection method for a bottom-mounted drying unit clothes dryer provided in this embodiment, and then specifically describes the system on which this method is based.

[0079] The anti-scalding protection method for bottom-loading clothes drying racks includes the following steps:

[0080] Step S10: Obtain the upper limit signal of the drying rod assembly, determine whether the drying rod assembly 130 is at the upper limit position. If not, lock the drying function, that is, lock the heating function and the fan function. If yes, unlock the drying function, that is, unlock the heating function and the fan function.

[0081] Step S20: Read the start signal of the drying function, start the drying function, that is, start the heating function and the fan function, and lock the lowering function of the drying rod assembly;

[0082] Step S30: Read the shut-off signal of the drying function, turn off the heating function, and enter the heat dissipation mode; start the running timer of the fan function, keep the fan function running and lock the lowering function of the drying rod assembly;

[0083] Step S40: When the fan function runs for a period of time T, turn off the fan function, end the heat dissipation mode, and unlock the descent function of the drying rack assembly.

[0084] Step S10 is the aforementioned first-level locking, and two specific implementation methods for first-level locking are provided here:

[0085] Method 1: When the drying rod assembly 130 is not at its upper limit position, the MCU microcontroller will program-lock the drying function, preventing it from being activated. The drying function will only be activated when the MCU microcontroller receives a signal that the drying rod assembly 130 has reached its upper limit position. The sensing method for the drying rod assembly 130 reaching its upper limit position can be achieved by setting a microswitch, infrared sensor, photoelectric sensor, or establishing an electrical connection between the drying rod assembly 130 and the main unit 110. This transmits the switch action signal, sensor analog signal, or electrical connection signal to the corresponding pin of the MCU microcontroller. In this embodiment, it is as follows: Figure 8 Pin number 10 is shown.

[0086] Method 2: For example Figure 3 and Figure 4 As shown, a power outlet 111 is provided below the main unit 110, and a power pin 131 is provided on the drying rod assembly 130. The power pin 131 is electrically connected to the heater and fan of the drying assembly 140 through a wire (not shown in the figure) laid along the connecting rod 141.

[0087] When the drying rack assembly 130 is as follows Figure 2 When the drying rod assembly 130 rises to its upper limit as shown, the power pin 131 on the drying rod assembly 130 is inserted into the power socket 111 to provide power for the operation of the heater and fan of the drying assembly 140. Therefore, the drying assembly 140 can only obtain power and operate when the drying rod assembly 130 rises to its upper limit, avoiding the situation where the drying function is turned on when the drying rod assembly 130 is in a low position, which could cause burns to the user.

[0088] Of course, the procedural interlocking of Method 1 and the electrical interlocking of Method 2 can be used simultaneously as backup protection for each other.

[0089] Steps S30 and S40 represent the aforementioned coordinated heat dissipation mode and secondary interlocking. The operating time T of the fan function is the same as the operating time T of the heat dissipation mode. Specific implementation methods for the coordination of the two heat dissipation modes and secondary interlocking are also provided here:

[0090] Method 1: The running time T of the heat dissipation mode is set to a fixed value. Preferably, it is preset to 5 minutes at the factory and set to a user-adjustable mode. The duration of the heat dissipation mode can be adjusted according to the user's preferences and habits. This is because in most cases, a heat dissipation time of about 5 minutes can basically reduce the residual temperature of the drying component 140 to within the safe margin, but there is a situation of energy waste.

[0091] Method two, which is the method adopted in this embodiment, involves adjusting the fan function's operating time T in real time according to the temperature of the drying component 140, specifically:

[0092] In step S30, when the MCU microcontroller reads the drying function's shutdown signal, shuts off the heating function, and enters the heat dissipation mode, it simultaneously acquires the temperature C1 of the drying component 140 and the ambient temperature K.

[0093] Step S40 includes the following steps:

[0094] Step S41: Obtain the temperature C of the drying component 140 every unit time T0. N The remaining operating time T of the fan function is calculated using the following formula. N :

[0095]

[0096] Step S42: Compare the operating time T of the fan function N And the unit time T0, if T N If T > T0, then repeat step S41. If T N If ≤T0, then proceed to step S43;

[0097] Step S43: The fan function continues to operate. N Afterwards, the fan function is turned off, the heat dissipation mode ends, and the lowering function of the drying rack assembly is unlocked; preferably, the unit time T0 is set to approximately 30 seconds to 1 minute and 30 seconds, for example, if the unit time T0 is 1 minute, when T... N When the time is less than or equal to 1 minute, the remaining heat dissipation time is less than 1 minute, and the heat dissipation mode will stop after the operation is completed.

[0098] Method 1 does not involve real-time temperature monitoring and intelligent heat dissipation time calculation, so it is suitable for low-end ordinary models of bottom-mounted drying racks. Method 2 can achieve real-time temperature monitoring. When the duration of the drying mode is different and the temperature of the drying component 140 is different when the drying function is turned off, it can intelligently calculate the duration of the heat dissipation mode. Under the premise of ensuring the safety of preventing scalding, it can save energy. Therefore, it is suitable for high-end intelligent models of bottom-mounted drying racks.

[0099] like Figure 5 and Figure 8 As shown, the anti-scalding protection system 200 of the bottom-mounted drying unit clothes dryer includes a drying unit control circuit 220 to implement the drying function in step S20. This circuit includes a heating control circuit 222 and a fan control circuit 221. The heating control circuit 222 controls the heating function to turn on and off, and the fan control circuit 221 controls the fan function to turn on and off. The controller 210 is electrically connected to the drying unit control circuit 220 and controls the drying function to turn on and off by controlling the on / off state of the drying unit control circuit 220.

[0100] The controller 210 includes a drying rod assembly lowering function unlocking module, a heat dissipation module, a drying function control module, and a motor control module. When implementing the anti-scalding protection method for the bottom-mounted drying assembly clothes dryer, these four modules respectively perform the following functions:

[0101] The drying rack assembly lowering function unlocking module is used to lock the drying rack assembly lowering function when the drying function is turned on, that is, when the heating function and fan function are turned on; and to unlock the drying rack assembly lowering function when the heat dissipation mode ends.

[0102] The heat dissipation module is used to activate the heat dissipation function when the heating function is turned off, that is, to switch the bottom-mounted drying unit clothes dryer 100 from the drying mode to the heat dissipation mode, start the running timer of the fan function, keep the fan function running, and turn off the fan function when the running time of the fan function reaches T.

[0103] The drying function control module is used to control the opening and closing of the drying function by controlling the on and off of the drying component control circuit 220, that is, to control the opening and closing of the heating function and the fan function by controlling the on and off of the heating control circuit 222 and the fan control circuit 221 respectively.

[0104] The motor control module is used to control the raising and lowering of the drying rack assembly 130 by controlling the operation mode of the motor, including sending forward, reverse and stop commands to the motor to control the raising, lowering and stopping of the drying rack assembly 130.

[0105] In addition, the controller 210 may also include a drying function unlocking module, which is used to determine whether the drying rod assembly 130 is in the upper limit position. If not, the drying function is locked, that is, the heating function and the fan function are locked. If so, the drying function is unlocked, that is, the heating function and the fan function are unlocked. This module implements the first-level locking function by program locking. If only electrical locking is used to implement the first-level locking function, the controller 210 may not have this module.

[0106] Furthermore, such as Figure 5 and Figure 8 As shown, the anti-scalding protection system 200 of the bottom-mounted drying unit clothes dryer provided in this embodiment also includes a driver 230, and the power supply is also used to power the driver 230. The controller 210 is electrically connected to the drying unit control circuit 220 through the driver 230.

[0107] The driver 230 is used to transmit instructions from the controller 210. In this embodiment, the driver 230 is a driver chip used to transmit instructions from the MCU microcontroller to the motor control circuit (not shown in the figure) to control the on / off state of the motor control circuit, thereby controlling the forward, reverse and stop rotation of the motor, and realizing the raising and lowering of the drying rod assembly 130; and to transmit instructions from the MCU microcontroller to the drying assembly control circuit 220 to control the on / off state of the drying assembly control circuit 220, thereby controlling the start and stop of the heating function and the fan function.

[0108] Specifically in this embodiment, such as Figure 8 As shown, the drying component control circuit 220 is a relay control circuit. The fan control circuit 221 includes a first relay K1 and a first control switch S1, with the first control switch S1 connected to the fan interface CN1. The first relay K1 is connected to the +12V power supply and then to the MCU microcontroller via driver 230; specifically, pin 3 of the first relay K1 is connected to pin 15 of driver 230, and pin 2 of driver 230 is connected to pin 13 of the MCU microcontroller.

[0109] The drying function control module of the MCU microcontroller sends a command to pin 2 of the driver 230 through pin 13. Pin 15 of the driver 230 controls the first relay K1 to be energized or de-energized, thereby controlling the first control switch S1 to be closed or opened, thus energizing or de-energizing the fan interface CN1 to control the fan function to be turned on or off.

[0110] The heating control circuit 222 includes a second relay K2 and a second control switch S2. The second control switch S2 is connected to the heater interface CN2. The second relay K2 is connected to the +12V power supply and is connected to the MCU microcontroller through the driver 230. Specifically, pin 3 of the second relay K2 is connected to pin 14 of the driver 230, and pin 3 of the driver 230 is connected to pin 14 of the MCU microcontroller.

[0111] The drying function control module of the MCU microcontroller sends a command to pin 3 of the driver 230 through its pin 14. Pin 14 of the driver 230 controls the second relay K2 to be energized or de-energized, thereby controlling the second control switch S2 to be closed or opened, thus energizing or de-energizing the heater interface CN2 to control the heating function to be turned on or off.

[0112] Furthermore, the motor control module of the MCU microcontroller is connected to pins 6 and 7 of the driver 230 via pins 22 and 23 respectively, and then connected to the motor control circuit via pins 11 and 10 of the driver 230. This allows the driver 230 to send commands for forward rotation and forward stop, and reverse rotation and reverse stop to the motor control circuit, thereby controlling the motor's operation and thus controlling the raising, lowering, and stopping of the drying rack assembly 130. Since this invention does not focus on demonstrating the MCU microcontroller's control over the motor's operation, this will not be elaborated upon here.

[0113] The intervention of driver 230 enhances the current driving capability of the relay, thereby improving the driving capability of the MCU microcontroller for the motor control circuit and the drying component control circuit 220.

[0114] In the bottom-mounted drying unit clothes dryer 100 provided in this embodiment, the anti-scalding protection system 200 of the bottom-mounted drying unit clothes dryer has a heating control circuit 222 connected to a heater, that is, the heater interface CN2 of the heating control circuit 222 is the heater interface CN2 of the heater, and the fan control circuit 221 is connected to a fan, that is, the fan interface CN1 of the fan control circuit 221 is the fan interface CN1 of the fan, thereby realizing that the drying function control module of the MCU microcontroller controls the start and stop of the heater and the fan by controlling the on and off of the heating control circuit 222 and the fan control circuit 221.

[0115] That is, in the drying mode, the MCU microcontroller controls the first relay K1 and the second relay K2 in the fan control circuit 221 and the heating control circuit 222 to be activated simultaneously through the driver 230, so that the heater and the fan are turned on at the same time. The fan blows the air out of the air outlet after it is heated by the heater and blows it to the clothes hanging on the drying rod assembly 130 to dry.

[0116] In the heat dissipation mode, the MCU microcontroller controls the second relay K2 of the heating control circuit 222 to be de-energized and the second control switch S2 to be opened via the driver 230, so that the heater is turned off. Meanwhile, the first relay K1 of the fan control circuit 221 remains energized and the first control switch S1 remains closed, so that the fan is kept running. Thus, the fan sends air through the heater and out of the air outlet to reduce the temperature of the drying component 140.

[0117] Preferably, in this embodiment, the heater is a PTC heating device.

[0118] In this embodiment, to achieve the second method of coordinating the heat dissipation mode and the secondary interlock, namely, adjusting the fan operation time T of the heat dissipation mode in real time according to the temperature of the drying component, the MCU microcontroller also includes a temperature monitoring module. When entering the heat dissipation mode, the temperature monitoring module acquires the temperature C1 of the drying component and the ambient temperature K, and acquires the temperature C of the drying component every unit time T0. N Then, the heat dissipation module cooperates by adjusting the fan function's operating time T in real time based on the temperature of the drying component obtained by the temperature monitoring module, and calculates the remaining fan function's operating time T using the following formula. N :

[0119]

[0120] And used to compare the operating time T of the fan function. N and unit time T0, until T N ≤T0, the fan function continues to run. N Then, turn off the fan function.

[0121] like Figure 8 As shown, in this embodiment, the anti-scalding protection system 200 of the bottom-mounted drying unit clothes dryer uses a temperature monitoring circuit 240 to assist the temperature monitoring module in monitoring the temperature C1 to C2 of the drying unit. N The system acquires and monitors the ambient temperature K, and the power supply powers the temperature monitoring circuit.

[0122] The temperature monitoring circuit 240 includes a drying component temperature monitoring circuit 241 and an ambient temperature monitoring circuit 242. The drying component temperature monitoring circuit 241 includes a first thermistor CN3, which can change its resistance value according to the change of the surface temperature of the drying component 140. In this embodiment, the first thermistor CN3 is attached to the surface of the housing of the drying component 140.

[0123] One end of the first thermistor CN3 is connected to pin 29 of the MCU microcontroller, and simultaneously connected to the +5V power supply through the first voltage divider resistor R1; the other end is grounded. The temperature monitoring module of the MCU microcontroller acquires the voltage of the first thermistor CN3. When the surface temperature of the drying assembly 140 changes, the resistance of the first thermistor CN3 changes, causing a change in its terminal voltage. After analog-to-digital conversion by the ADC module of the MCU microcontroller, the temperature C of the drying assembly is obtained. N .

[0124] The ambient temperature monitoring circuit 242 includes a second thermistor CN4, which can change its resistance value according to the change of ambient temperature. In this embodiment, the second thermistor CN4 is attached to the host component 110.

[0125] One end of the second thermistor CN4 is connected to pin 28 of the MCU microcontroller, and simultaneously connected to the +5V power supply through the second voltage divider resistor R2. The other end is grounded. The temperature monitoring module of the MCU microcontroller obtains the voltage of the second thermistor CN4. When the ambient temperature K changes, the resistance of the second thermistor CN4 changes, causing its terminal voltage to change. After analog-to-digital conversion by the MCU microcontroller's ADC module, the ambient temperature K is obtained.

[0126] Preferably, the first thermistor CN3 and the second thermistor CN4 are NTC thermistors.

[0127] In other embodiments, the anti-scalding protection system 200 of the bottom-mounted drying unit clothes dryer can also use an infrared temperature sensor to assist the temperature monitoring module in monitoring the temperature C1 to C of the drying unit. N The acquisition and monitoring of ambient temperature K. For example, an infrared temperature sensor is installed on the main unit 110 and connected to the MCU microcontroller. The infrared temperature sensor collects the surface temperature of the drying assembly 140 and the ambient temperature, and transmits this data to the MCU microcontroller. The temperature monitoring module of the MCU microcontroller obtains the surface temperature C of the drying assembly 140 through analog-to-digital conversion by the ADC module. N and ambient temperature (K).

[0128] Compared to using a thermistor, using an infrared sensor for monitoring can reduce the wiring between the first thermistor CN3 attached to the surface of the drying assembly 140 and the MCU microcontroller inside the main unit 110. However, when there are many or large items of clothing hanging on the drying rod assembly 130, the infrared sensor can easily be blocked, resulting in a larger error and lower acquisition efficiency than using a thermistor.

[0129] In summary, the anti-scalding protection method for the bottom-mounted drying component clothes dryer provided by the present invention, through setting a first-level lock, enables the bottom-mounted drying component 140 to unlock the drying function when it rises to the upper limit position along with the drying rod component 130. That is, the drying component 140 can only be turned on when it is in a safe position where it is not likely to be scalded. Furthermore, by setting a mutually cooperating heat dissipation mode and a second-level lock, the heat dissipation function is turned on and the heat dissipation mode is entered when the drying function is turned off and the drying mode ends. When the residual heat of the drying component 140 is reduced to a safe temperature, the descent function of the drying rod component is unlocked, and the drying component 140 can then descend along with the drying rod component 130, thereby effectively preventing the user from being scalded by the bottom-mounted drying component 140 during use.

[0130] The present invention provides an anti-scalding protection system for a bottom-mounted drying unit clothes dryer and a clothes dryer equipped with the system. The anti-scalding protection method for the bottom-mounted drying unit clothes dryer is executed and realized by a controller and control circuit. It has a high degree of integration and is conducive to the development of clothes dryers towards lightweight, miniaturization and intelligence. It also helps to reduce the cost of the protection system for the bottom-mounted drying unit clothes dryer.

[0131] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0132] The above describes the anti-scalding protection method, system, and clothes drying machine of the bottom-mounted drying unit provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the present invention and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A scalding protection method for a bottom-mounted drying unit clothes dryer, characterized in that: Includes the following steps: Step S10: Obtain the upper limit signal of the drying rod assembly, determine whether the drying rod assembly is at the upper limit position. If not, lock the drying function, that is, lock the heating function and the fan function. If yes, unlock the drying function, that is, unlock the heating function and the fan function. Step S20: Read the activation signal of the drying function, activate the drying function, that is, activate the heating function and the fan function, and lock the lowering function of the drying rod assembly; Step S30: Read the shutdown signal of the drying function, turn off the heating function, and enter the heat dissipation mode; start the running timer of the fan function, keep the fan function running and lock the lowering function of the drying rod assembly; Step S40: When the running time of the fan function reaches T, the fan function is turned off, the heat dissipation mode ends, and the descent function of the drying rod assembly is unlocked.

2. The anti-scalding protection method for a bottom-mounted drying unit clothes dryer according to claim 1, characterized in that: The operating time T of the fan function when the heat dissipation mode is adjusted in real time according to the temperature of the drying component; In step S30, when entering the heat dissipation mode, the temperature C1 of the drying component and the ambient temperature K are obtained; Step S40 includes the following steps: Step S41: Obtain the temperature C of the drying component every unit time T0. N The remaining operating time T of the fan function is calculated using the following formula. N : Step S42: Compare the operating time T of the fan function. N And the unit time T0, if T N If T > T0, then repeat step S41. If T N If ≤T0, then proceed to step S43; Step S43: The fan function continues to operate. N Then, turn off the fan function, end the heat dissipation mode, and unlock the lowering function of the drying rod assembly.

3. The anti-scalding protection system of a bottom-mounted drying unit clothes dryer is characterized by: A method for implementing the anti-scalding protection method of a clothes drying rack with a bottom-mounted drying component as described in any one of claims 1-2, comprising a power supply, a controller, and a drying component control circuit; The power supply is used to power the controller and the control circuit of the drying component; The drying component control circuit includes a heating control circuit and a fan control circuit; The controller is electrically connected to the control circuit of the drying component, including: The drying rod assembly lowering function unlocking module is used to lock the drying rod assembly lowering function when the drying function is turned on, that is, when the heating function and the fan function are turned on; and to unlock the drying rod assembly lowering function when the heat dissipation mode ends. The heat dissipation module is used to start the running timer of the fan function when the heating function is turned off, to keep the fan function running, and to turn off the fan function when the running time of the fan function reaches T. The drying function control module is used to control the opening and closing of the drying function by controlling the on and off of the drying component control circuit, that is, to control the opening and closing of the heating function and the fan function by controlling the on and off of the heating control circuit and the fan control circuit respectively. The motor control module is used to control the raising and lowering of the drying rack assembly by controlling the operation of the motor.

4. The anti-scalding protection system of the bottom-mounted drying unit clothes dryer according to claim 3, characterized in that: It also includes a driver; the power supply is also used to power the driver; The controller is electrically connected to the drying component control circuit via the driver. The driver is used to transmit instructions from the controller and control the on / off state of the motor control circuit and the drying component control circuit, so as to control the raising and lowering of the drying rod assembly, and to control the opening and closing of the heating function and the fan function.

5. The anti-scalding protection system of the bottom-mounted drying unit clothes dryer according to claim 3, characterized in that: The controller also includes a temperature monitoring module; The temperature monitoring module is used to acquire the temperature C1 of the drying component and the ambient temperature K when entering the heat dissipation mode, and to acquire the temperature C of the drying component once every unit time T0. N ; The heat dissipation module is used to adjust the operating time T of the fan function in real time according to the temperature of the drying component obtained by the temperature monitoring module, and calculates the remaining operating time T of the fan function using the following formula. N : And used to compare the operating time T of the fan function. N and the unit time T0, until T N ≤T0, the fan function continues to operate for T N Then, turn off the fan function.

6. The anti-scalding protection system of the bottom-mounted drying unit clothes dryer according to claim 5, characterized in that: It also includes a temperature monitoring circuit; the power supply is also used to power the temperature monitoring circuit. The temperature monitoring circuit includes a drying component temperature monitoring circuit and an ambient temperature monitoring circuit; The temperature monitoring circuit for the drying assembly includes a first thermistor, which changes its resistance according to changes in the surface temperature of the drying assembly. One end of the first thermistor is connected to the controller, and the controller's temperature monitoring module acquires the voltage of the first thermistor and converts it to digital to obtain the temperature C of the drying assembly. N ; The ambient temperature monitoring circuit includes a second thermistor, which changes its resistance according to changes in ambient temperature. One end of the second thermistor is connected to the controller, and the temperature monitoring module of the controller is used to acquire the voltage of the second thermistor and obtain the ambient temperature K through analog-to-digital conversion.

7. The anti-scalding protection system of the bottom-mounted drying unit clothes dryer according to claim 5, characterized in that: It also includes an infrared temperature sensor; The infrared temperature sensor is connected to the controller. The infrared temperature sensor collects the temperature of the drying assembly and the ambient temperature, and transmits this data to the controller. The controller's temperature monitoring module performs analog-to-digital conversion to obtain the temperature C of the drying assembly. N and ambient temperature (K).

8. The anti-scalding protection system of the bottom-mounted drying unit clothes dryer according to claim 3, characterized in that: The control circuit for the drying component is a relay control circuit; The heating control circuit includes a first relay and a first control switch. The first control switch is connected to the fan interface, and the first relay is connected to the power supply and the controller. The drying function control module of the controller is used to control the power supply of the first relay to control the opening and closing of the first control switch, thereby controlling the opening and closing of the fan function. The fan control circuit includes a second relay and a second control switch. The second control switch is connected to the heater interface, and the second relay is connected to the power supply and the controller. The drying function control module of the controller is used to control the power supply of the second relay to control the opening and closing of the second control switch, thereby controlling the heating function to be turned on or off.

9. A clothes drying rack with a bottom-mounted drying unit, characterized in that: It includes a main unit, a lifting assembly, a drying rod assembly, and a drying assembly, as well as an anti-scalding protection system for a clothes drying machine with a bottom-mounted drying assembly as described in any one of claims 3-8; The main unit is equipped with a motor, and the drying rod assembly is connected to the lower part of the main unit through the lifting assembly. The motor drives the lifting assembly to drive the drying rod assembly to rise and fall. The drying assembly is connected below the drying rod assembly and can rise and fall with the drying rod assembly; The drying assembly includes an air outlet, a heater, and a fan; The heating control circuit is connected to the heater, and the fan control circuit is connected to the fan; The motor control module of the controller controls the raising and lowering of the drying rack assembly by controlling the operation mode of the motor; The drying function control module of the controller controls the start and stop of the heater and the fan by controlling the on and off of the heating control circuit and the fan control circuit; In drying mode, both the heater and the fan are turned on, and the fan is used to blow air out from the air outlet after it has been heated by the heater. In heat dissipation mode, the heater is turned off, while the fan is kept running. The fan is used to pass air through the heater and then send it out from the air outlet to reduce the temperature of the drying component.

10. The bottom-mounted drying unit clothes dryer according to claim 9, characterized in that: The main unit has a power outlet at its bottom and a power pin on the drying rod assembly. The power pin is electrically connected to the heater and fan of the drying assembly. When the drying rod assembly rises to its upper limit, the power pin is inserted into the power socket to provide power for the operation of the drying assembly.

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