Transmission belt slip detection assembly, clothes processing equipment and transmission belt slip detection method

Abstract

The invention relates to a transmission belt slip detection assembly, clothes processing equipment and a transmission belt slip detection method in the technical field of clothes processing equipment, and the transmission belt slip detection assembly comprises a reflective mark which is arranged on a driven wheel in the transmission belt slip detection assembly; the optical signal transmitting module is used for transmitting an optical signal to the reflective mark; the optical signal receiving module is used for receiving an optical signal reflected by the reflective mark; and the processor determines whether the transmission belt slips or not according to the time rule of receiving the optical signals by the optical signal receiving module. The transmission belt slip detection assembly is simple in structural design, can detect different transmission belt slip conditions through the cooperation of the reflective mark, the optical signal transmitting module and the optical signal receiving module, and is especially suitable for relatively narrow and dark space in the washing machine.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing processing equipment, and in particular to a transmission belt slippage detection component, clothing processing equipment, and a transmission belt slippage detection method. Background Art

[0002] In the technical field related to clothing processing equipment, taking a belt-driven drum washing machine as an example, after a long period of use, the belt becomes severely worn, the contact surface between the belt and the motor shaft becomes smooth, the friction between the two is insufficient, and slipping occurs; or because the load placed by the user is too heavy, exceeding the design load-bearing capacity of the drum washing machine, the motor shaft cannot drive the belt to operate, and slipping occurs.

[0003] When the transmission belt slips, the motor shaft idles, the drum stops or vibrates slightly, which not only fails to achieve the desired washing effect but also causes power loss. In addition, the motor shaft and the local transmission belt continue to rub, which will cause local heating over a long period of time, leading to serious consequences such as fire or transmission belt breakage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that when the transmission belt slips, the motor shaft idles and the drum is stationary or vibrates slightly, which not only fails to achieve the desired washing effect but also causes power loss. In addition, the motor shaft and the local transmission belt are constantly rubbing against each other, which will cause local heating over a long period of time, leading to serious consequences such as fire or transmission belt breakage. A transmission belt slip detection component, clothing processing equipment and transmission belt slip detection method are provided.

[0005] The present invention aims to provide a transmission belt slippage detection assembly, comprising: a reflective mark, the reflective mark being provided on the driven wheel in the transmission belt slippage detection assembly; An optical signal transmitting module, configured to transmit an optical signal toward the reflective marker; An optical signal receiving module, configured to receive an optical signal reflected from the reflective marker; a processor, configured to determine whether the transmission belt is slipping based on a time pattern of the optical signal receiving module receiving the optical signal; The time rules include: The duration of the optical signal receiving module receiving the optical signal, and the interval between two adjacent optical signals received by the optical signal receiving module.

[0006] In some embodiments, determining whether the transmission belt is slipping based on a time regularity of the optical signal receiving module receiving the optical signal includes: Under the preset rotation speed condition, if the duration of the optical signal receiving module receiving the optical signal is less than or equal to the preset duration, or the interval between two adjacent optical signals received by the optical signal receiving module is less than or equal to the preset interval, it is determined that the transmission belt does not slip; Under the preset speed condition, if the duration of the optical signal receiving module receiving the optical signal is greater than the preset duration, or the interval between the optical signal receiving module receiving two adjacent optical signals is greater than the preset interval, it is determined that the transmission belt is slipping.

[0007] In some embodiments, the optical signal receiving module includes a photoresistor, a voltage divider resistor, and a voltage source connected in series; When the photoresistor receives the light signal reflected from the reflective mark, the resistance value decreases, and when the photoresistor does not receive the light signal reflected from the reflective mark, the resistance value increases. The change in the resistance value of the photoresistor can cause a voltage pulse at both ends of the photoresistor; The preset duration is designed to be: the duration of the voltage pulse when the transmission belt does not slip; The preset interval duration is designed to be: the interval duration between two adjacent voltage pulses when the transmission belt does not slip.

[0008] In some embodiments, the processor includes: A voltage pulse acquisition module, wherein the processor acquires the voltage pulses at both ends of the photoresistor through the voltage pulse acquisition module, and determines the time regularity according to the acquired voltage pulses.

[0009] In some embodiments, the reflective mark is provided on the outer peripheral wall of the driven wheel at a position that does not contact the transmission belt.

[0010] In some embodiments, the length of the reflective mark along the outer peripheral wall of the driven wheel is W; The output speed of the driving motor for driving the driven wheel to rotate is N rpm; The output terminal of the drive motor is connected to the driven wheel through the transmission belt, the output terminal of the drive motor and the driven wheel transmission ratio is P; The radius of the driven wheel is R, and the time required for one rotation is 60 / (N / p) seconds; Wherein, the preset duration = T1 seconds + (W / 2πR) × [60 / (N / p)] seconds, where T1 is the duration of the duration margin; The preset interval duration=T2 seconds+60 / (N / p) seconds, where T2 is the interval margin duration.

[0011] In some embodiments, a laundry processing apparatus is provided, comprising: The aforementioned transmission belt slippage detection assembly; A clothes processing drum is fixedly connected to the driven wheel in the transmission belt slippage detection assembly.

[0012] In some embodiments, the optical signal transmitting module and the optical signal receiving module are both arranged on a main control board of the clothing processing device, and the main control board is electrically connected to the optical signal transmitting module and the optical signal receiving module.

[0013] In some embodiments, a transmission belt slippage detection method is provided for controlling the transmission belt slippage detection component or the laundry processing device; the method comprises: Determining whether the transmission belt is slipping according to whether the duration of the optical signal receiving module receiving the optical signal is greater than a preset duration, or whether the interval duration of the optical signal receiving module receiving the optical signal is greater than a preset interval duration; If the duration of the optical signal receiving module receiving the optical signal is longer than the preset duration, or the interval duration of the optical signal receiving module receiving the optical signal is longer than the preset interval duration, it is determined that the transmission belt is slipping; Otherwise, it is determined that the drive belt is not slipping.

[0014] The solution provided by the present invention has the following beneficial effects compared with the prior art: The belt slip detection assembly features a simple design. It utilizes reflective markings, a combination of an optical signal transmitter module, and an optical signal receiver module to detect various belt slip conditions. This makes it particularly suitable for use in the confined, dark spaces of washing machines. This assembly promptly detects belt slip, preventing persistent friction between the drive motor's output end (i.e., the shaft) and the belt, which could lead to localized heating and potentially fire or belt breakage. The assembly also notifies the user when the belt needs to be replaced or the load in the laundry tub needs to be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings: Figure 1 1 is a schematic diagram of a transmission belt slippage detection assembly according to an embodiment of the present invention; Figure 2This is one of the schematic diagrams showing a reflective mark located on a driven wheel according to an embodiment of the present invention; Figure 3 This is the second schematic diagram of the reflective mark located on the driven wheel shown in the embodiment of the present invention; Figure 4 is a schematic diagram of an optical signal receiving module according to an embodiment of the present invention; Figure 5 4 is a flow chart of a method for detecting transmission belt slippage according to an embodiment of the present invention.

[0016] In the figure: 1-driving motor, 2-driven wheel, 3-transmission belt, 4-reflective mark, 5-optical signal transmitting module, 6-optical signal receiving module, 601-photoresistor, 602-voltage dividing resistor, 603-voltage source, 7-main control board.

[0017] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be noted that the terms "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "in contact," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] In the technical field related to clothing processing equipment, when the transmission belt slips, the motor shaft idles and the drum stops or vibrates slightly, which not only fails to achieve the desired washing effect but also causes power loss. In addition, the motor shaft and the local transmission belt continue to rub, which will cause local heating over a long period of time, leading to serious consequences such as fire or transmission belt breakage.

[0021] Based on this, the following embodiments are proposed.

[0022] Example 1: like Figure 1 As shown, this embodiment provides a transmission belt slippage detection assembly, comprising: A reflective mark 4, the reflective mark 4 being provided on the driven wheel 2 in the transmission belt slippage detection assembly; An optical signal transmitting module 5, configured to transmit an optical signal to the reflective marker 4; An optical signal receiving module 6, configured to receive the optical signal reflected from the reflective marker 4; The processor determines whether the transmission belt 3 is slipping according to the time regularity of the optical signal receiving module 6 receiving the optical signal.

[0023] In this embodiment, the output end of the driving motor 1 works, and the driven wheel 2 is driven to rotate synchronously through the transmission belt 3. The driven wheel 2 drives the clothes processing drum of the washing machine as an example for explanation. The clothes processing drum and the driven wheel 2 are fastened and fixed by bolts and nuts. Thus, the clothes processing drum rotates synchronously with the driven wheel 2 to complete the washing function.

[0024] Preferably, the reflective mark 4 is a reflective tape that is adhesively bonded to the circumferential sidewall of the driven wheel 2. When the transmission belt slip detection assembly is in operation, the driven wheel 2 rotates continuously driven by the transmission belt 3, and a light signal is emitted through the optical signal transmitting module 5. The light signal is irradiated on the reflective tape at regular intervals, and the light signal is reflected by the reflective tape. The reflected light signal is then received by the optical signal receiving module 6.

[0025] Furthermore, the time regularity includes: The duration of the optical signal receiving module 6 receiving the optical signal, and the interval between two adjacent optical signals received by the optical signal receiving module 6 .

[0026] When the transmission belt 3 does not slip, the duration of the light signal received by the optical signal receiving module 6 is generally fixed. If the duration of the light signal received by the optical signal receiving module 6 exceeds the fixed duration, it indicates that the light signal emitted by the optical signal transmitting module 5 always stays on the reflective tape, and the light signal is always received by the optical signal receiving module 6 under the reflection of the reflective tape, or it indicates that the light signal emitted by the optical signal transmitting module 5 stays on the reflective tape for a long time, and the light signal is received by the optical signal receiving module 6 for a long time under the reflection of the reflective tape. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt 3 is slipping.

[0027] When the transmission belt 3 does not slip, the interval between two adjacent light signals received by the optical signal receiving module 6 is generally fixed. If the duration of two adjacent light signals received by the optical signal receiving module 6 exceeds the fixed duration, it indicates that the light signal emitted by the optical signal transmitting module 5 always stays outside the reflective tape and has not been reflected by the reflective tape and received by the optical signal receiving module 6, or it indicates that the light signal emitted by the optical signal transmitting module 5 stays outside the reflective tape for a long time and has not been received by the optical signal receiving module 6 for a long time. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt 3 is slipping.

[0028] The structural design of the transmission belt slippage detection component makes it simple in structure and can detect different transmission belt slippage conditions, and is particularly suitable for the relatively narrow and dark space inside the washing machine.

[0029] The belt slip detection assembly can promptly detect belt slippage, preventing the output end of the drive motor 1, i.e., the shaft of the drive motor 1, from rubbing against a portion of the drive belt 3. This could cause localized heating of the belt 3, leading to fire or severe breakage. The belt slip detection assembly can also promptly notify the user when the belt needs to be replaced or the load in the laundry tub needs to be reduced.

[0030] Optionally, in an implementation of this embodiment, as Figure 1 As shown, The determining whether the transmission belt 3 is slipping according to the time regularity of the optical signal receiving module 6 receiving the optical signal includes: Under the preset speed condition, if the duration of the optical signal receiving module 6 receiving the optical signal is less than or equal to the preset duration, or if the interval between two adjacent optical signals received by the optical signal receiving module 6 is less than or equal to the preset interval, it is determined that the transmission belt 3 does not slip; Under the preset speed condition, if the duration of the optical signal receiving module 6 receiving the optical signal is greater than the preset duration, or the interval between two adjacent optical signals received by the optical signal receiving module 6 is greater than the preset interval, it is determined that the transmission belt is slipping.

[0031] In this embodiment, when the transmission belt 3 is in good operating condition and there is no slippage, a preset duration and a preset interval duration can be set and used as basic preset data for subsequent detection of transmission belt slippage. The preset duration and the preset interval duration can be obtained by testing the product with a transmission belt drive mode before it leaves the factory. The transmission belt slippage detection component can accurately determine whether the transmission belt 3 is slipping by comparing the actual duration of the optical signal received by the optical signal receiving module 6 and the actual interval duration of two adjacent optical signals received by the optical signal receiving module 6 with the preset duration and the preset interval duration. Both the detection component structure and the detection logic of the detection component are relatively simplified.

[0032] Optionally, in an implementation of this embodiment, as Figure 1 、 4 As shown, The optical signal receiving module 6 includes a photoresistor 601, a voltage divider resistor 602 and a voltage source 603 connected in series; When the photoresistor 601 receives the light signal reflected by the reflective mark 4, the resistance value decreases. When the photoresistor 601 does not receive the light signal reflected by the reflective mark 4, the resistance value increases. The change in the resistance value of the photoresistor 601 can cause a voltage pulse at both ends of the photoresistor 601. The preset duration is designed to be: the duration of the voltage pulse when the transmission belt 3 does not slip; The preset interval duration is designed to be: the interval duration between two adjacent voltage pulses when the transmission belt 3 does not slip.

[0033] In this embodiment, the optical signal receiving module 6 includes a photoresistor 601, a voltage divider resistor 602, and a voltage source 603 connected in series. When the optical signal emitted by the optical signal transmitting module 5 is irradiated on the reflective mark 4, the reflective mark 4 reflects the optical signal to the photoresistor 601 in the optical signal receiving module 6. The photoresistor 601 is sensitive to light intensity. When no light is irradiated on the photoresistor, the resistance of the photoresistor 601 is large. When light is irradiated on the photoresistor 601, its resistance is small. The transmission belt slippage detection component collects the voltage pulses caused by the resistance change at both ends of the photoresistor. It can convert the actual duration of the optical signal received by the optical signal receiving module 6 into the actual duration of a single voltage pulse to be monitored, and convert the actual interval between two adjacent optical signals received by the optical signal receiving module 6 into the actual interval between two adjacent voltage pulses to be monitored, thereby determining whether the transmission belt 3 is slipping.

[0034] The voltage pulse formation mechanism is further explained: Voltage pulses are sudden changes in the output voltage of the voltage divider circuit caused by changes in the resistance of the photoresistor as light intensity changes. The photosensitive circuit, or light signal receiving module 6, consists of a photoresistor 601, a voltage divider resistor 602, and a voltage source 603 connected in series. The operating principle is as follows: Voltage source 603, for example, a DC power supply, provides a fixed voltage V. Voltage divider resistor 602, with a fixed resistance R, is connected in series with photoresistor 601. The sampling points of the photosensitive circuit are located at both ends of photoresistor 601. The output voltage of photoresistor 601 is measured at these sampling points. The high resistance of photoresistor 601 results in a high output voltage. When exposed to light, its resistance decreases, resulting in a low output voltage. When the transmission belt 3 is moving normally, light signals intermittently strike photoresistor 601, causing the output voltage to periodically vary, thereby generating voltage pulses.

[0035] Voltage pulse start: When the light signal starts to illuminate the photoresistor 601, the resistance of the photoresistor 601 suddenly decreases, rapidly dropping from a high level to a low level, forming the start of a voltage pulse. The voltage pulse continues to remain at a low level during the illumination period. End of voltage pulse: When the light signal stops irradiating, the resistance of the photoresistor 601 suddenly increases, rising rapidly from a low level to a high level, forming the end of the voltage pulse.

[0036] Optionally, in an implementation of this embodiment, as Figure 1 As shown, The processor includes: The voltage pulse acquisition module is used by the processor to acquire the voltage pulses at both ends of the photoresistor 601 and determine the time regularity according to the acquired voltage pulses.

[0037] In this embodiment, the setting of the voltage pulse acquisition module facilitates the acquisition of the actual duration of a single voltage pulse and the actual interval between two adjacent voltage pulses. By comparing the actual duration and the actual interval with the preset duration and the preset interval respectively, it is possible to accurately determine whether the transmission belt 3 is slipping. Both the detection component structure and the detection logic of the detection component are relatively simplified. The transmission belt slippage detection component can determine whether the transmission belt 3 is slipping in a simpler way.

[0038] Optionally, in an implementation of this embodiment, as Figure 2 As shown, The reflective mark 4 is provided on the outer peripheral wall of the driven wheel 2 at a position that does not contact the transmission belt 3 .

[0039] In this embodiment, Figure 2As shown, on the driven wheel 2, the reflective marker 4 and the transmission belt 3 are not installed at the same height, which can prevent the transmission belt 3 from blocking the light signal emitted by the optical signal transmitting module 5. The reflective marker 4 is set on the outer peripheral wall of the driven wheel 2. This setting position can reduce the axial space occupied by the reflective marker 4 on the driven wheel 2. Especially in the installation scenario of a washing machine, the driven wheel 2 is axially connected to the clothes processing drum. Setting the reflective marker 4 on the outer peripheral wall of the driven wheel 2 not only facilitates the illumination of the light signal emitted by the optical signal transmitting module 5, but also facilitates the reflective marker 4 to reflect the light signal itself.

[0040] Optionally, in an implementation of this embodiment, as Figure 1 、 3 As shown, The length of the reflective mark 4 along the outer peripheral wall of the driven wheel 2 is W; The output speed of the driving motor 1 for driving the driven wheel 2 is N rpm; The output end of the drive motor 1 is connected to the driven wheel 2 through the transmission belt 3, the output end of the drive motor 1 and the driven wheel 2 transmission ratio is P; The radius of the driven wheel 2 is R, and the time required for one rotation is 60 / (N / p) seconds; Wherein, the preset duration = T1 seconds + (W / 2πR) × [60 / (N / p)] seconds, where T1 is the duration of the duration margin; The preset interval duration=T2 seconds+60 / (N / p) seconds, where T2 is the interval margin duration.

[0041] In this embodiment, it is known that the output speed of the drive motor 1 is Nrpm, and the transmission ratio between the output of the drive motor 1 and the driven wheel 2 is P. Then, the speed of the driven wheel 2 is (N / p)rpm, that is, (N / p) revolutions / min. Then, the time required for the driven wheel 2 to rotate one circle is 60 / (N / p) seconds. In other words, when the transmission belt 3 does not slip, its preset interval time is 60 / (N / p) seconds. The transmission precision of the mechanical structure has a certain influence on the transmission. The preset interval time is set to be equal to T2 seconds + 60 / (N / p) seconds. T2 is the interval margin time. The increase of T2 is used to offset the transmission lag caused by the low transmission precision. The value of T2 can be set according to the actual transmission situation. Preferably, T2=60 / (N / p) seconds. It is known that the length of the reflective mark 4 along the outer peripheral wall direction of the driven wheel 2 is W, and the circumference of the outer peripheral wall of the driven wheel 2 is 2πR. Then, when the transmission belt 3 does not slip, the time for which the light signal is continuously irradiated on the reflective mark 4 is the preset duration, which is equal to T1 seconds + (W / 2πR) × [60 / (N / p)] seconds. Similarly, T1 is set to offset the transmission lag caused by low transmission precision. The value of T1 can be set according to the actual transmission situation. Preferably, T1 = (W / πR) × [60 / (N / p)] seconds.

[0042] In this embodiment, the method for obtaining the output speed of the drive motor 1 is as follows: In motor control, there are two methods for detecting motor position and speed: one is to detect motor position and speed with a position sensor, and the other is to estimate motor position and speed using an observer method without a position sensor. Due to the cost of position sensors and the risk of sensor damage, existing motor control generally uses a control algorithm without a position sensor to estimate motor position and speed.

[0043] Example 2 like Figure 2 As shown, this embodiment provides a clothes processing device, comprising: The transmission belt slippage detection assembly in embodiment 1; A clothes processing drum is fixedly connected to the driven wheel 2 in the transmission belt slippage detection assembly.

[0044] Furthermore, the optical signal transmitting module 5 and the optical signal receiving module 6 are both arranged on a main control board 7 of the clothing processing device, and the main control board 7 is electrically connected to the optical signal transmitting module 5 and the optical signal receiving module 6 .

[0045] In this embodiment, the clothing processing device is provided with a transmission belt slippage detection component, and the main control board 7 of the clothing processing device provides power to the optical signal transmitting module 5 and the optical signal receiving module 6. In the clothing processing device, when the transmission belt 3 does not slip, the duration of the optical signal received by the optical signal receiving module 6 is generally fixed. If the duration of the optical signal received by the optical signal receiving module 6 exceeds the fixed duration, it indicates that the optical signal emitted by the optical signal transmitting module 5 always stays on the reflective tape, and the optical signal is always received by the optical signal receiving module 6 under the reflection effect of the reflective tape, or it indicates that the optical signal emitted by the optical signal transmitting module 5 stays on the reflective tape for a longer period of time, and the optical signal is received by the optical signal receiving module 6 for a longer period of time under the reflection effect of the reflective tape. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt 3 is slipping.

[0046] When the transmission belt 3 does not slip, the interval between two adjacent light signals received by the optical signal receiving module 6 is generally fixed. If the duration of two adjacent light signals received by the optical signal receiving module 6 exceeds the fixed duration, it indicates that the light signal emitted by the optical signal transmitting module 5 always stays outside the reflective tape and has not been reflected by the reflective tape and received by the optical signal receiving module 6, or it indicates that the light signal emitted by the optical signal transmitting module 5 stays outside the reflective tape for a long time and has not been received by the optical signal receiving module 6 for a long time. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt 3 is slipping.

[0047] The structural design of the transmission belt slippage detection component makes it simple in structure and can detect different transmission belt slippage conditions, and is particularly suitable for the relatively narrow and dark space inside the clothing processing equipment.

[0048] The belt slip detection assembly can promptly detect belt slippage, preventing the output end of the drive motor 1, i.e., the shaft of the drive motor 1, from rubbing against a portion of the drive belt 3. This could cause localized heating of the belt 3, leading to fire or severe breakage. The belt slip detection assembly can also promptly notify the user when the belt needs to be replaced or the load in the laundry tub needs to be reduced.

[0049] Example 3 like Figure 5 As shown, a transmission belt slippage detection method is used to control the transmission belt slippage detection component in Example 1 or the clothing processing device in Example 2; the method includes: Determine whether the transmission belt 3 is slipping according to whether the duration of the optical signal receiving module 6 receiving the optical signal is greater than a preset duration, or whether the interval duration of the optical signal receiving module 6 receiving the optical signal is greater than a preset interval duration; If the duration of the optical signal receiving module 6 receiving the optical signal is longer than the preset duration, or the interval duration of the optical signal receiving module 6 receiving the optical signal is longer than the preset interval duration, it is determined that the transmission belt 3 is slipping; Otherwise, it is determined that the transmission belt 3 is not slipping.

[0050] In this embodiment, when the transmission belt 3 does not slip, the duration of the light signal received by the optical signal receiving module 6 is generally fixed. If the duration of the light signal received by the optical signal receiving module 6 exceeds the fixed duration, it indicates that the light signal emitted by the optical signal transmitting module 5 always stays on the reflective tape, and the light signal is always received by the optical signal receiving module 6 under the reflection of the reflective tape, or it indicates that the light signal emitted by the optical signal transmitting module 5 stays on the reflective tape for a longer period of time, and the light signal is received by the optical signal receiving module 6 for a longer period of time under the reflection of the reflective tape. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt 3 is slipping.

[0051] When the transmission belt 3 does not slip, the interval between two adjacent light signals received by the optical signal receiving module 6 is generally fixed. If the duration of two adjacent light signals received by the optical signal receiving module 6 exceeds the fixed duration, it indicates that the light signal emitted by the optical signal transmitting module 5 always stays outside the reflective tape and has not been reflected by the reflective tape and received by the optical signal receiving module 6, or it indicates that the light signal emitted by the optical signal transmitting module 5 stays outside the reflective tape for a long time and has not been received by the optical signal receiving module 6 for a long time. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt 3 is slipping.

[0052] The transmission belt slip detection method determines whether the transmission belt 3 is slipping according to whether the duration of the optical signal receiving module 6 receiving the optical signal is greater than a preset duration, or whether the interval duration of the optical signal receiving module 6 receiving the optical signal is greater than a preset interval. If the duration of the optical signal receiving module 6 receiving the optical signal is longer than the preset duration, or the interval duration of the optical signal receiving module 6 receiving the optical signal is longer than the preset interval duration, it is determined that the transmission belt 3 is slipping; Otherwise, that is, the duration of the optical signal receiving module 6 receiving the optical signal is less than or equal to the preset duration, and the interval duration of the optical signal receiving module 6 receiving the optical signal is less than or equal to the preset interval duration, it is determined that the transmission belt 3 is not slipping.

[0053] This belt slip detection method can promptly detect belt slip, preventing the output end of the drive motor 1, i.e., the shaft of the drive motor 1, from rubbing against a portion of the drive belt 3. This could cause localized heating of the belt 3, leading to fire or severe breakage. The belt slip detection assembly can also promptly notify the user when the belt needs to be replaced or the load in the laundry tub needs to be reduced.

[0054] In summary, the ingenious design of the transmission belt slip detection component lies in: The drive belt slip detection assembly has a simple structural design and simple detection logic. It can detect different drive belt slip conditions and is particularly suitable for the narrow, dark spaces inside washing machines. When the drive belt is not slipping, the duration of the light signal received by the optical signal receiving module is generally fixed. If the duration of the light signal received by the optical signal receiving module exceeds this fixed duration, it indicates that the light signal emitted by the optical signal transmitting module always remains on the reflective tape and is continuously received by the optical signal receiving module due to the reflection of the reflective tape. Alternatively, it indicates that the light signal emitted by the optical signal transmitting module remains on the reflective tape for a long period of time and is continuously received by the optical signal receiving module due to the reflection of the reflective tape. In both cases, the drive belt slip detection assembly can determine that the drive belt is slipping. When the transmission belt does not slip, the interval between two adjacent optical signals received by the optical signal receiving module is generally fixed. If the duration of two adjacent optical signals received by the optical signal receiving module exceeds the fixed duration, it indicates that the optical signal emitted by the optical signal transmitting module always stays outside the reflective tape and has not been reflected by the reflective tape and received by the optical signal receiving module, or it indicates that the optical signal emitted by the optical signal transmitting module stays outside the reflective tape for a long time and has not been received by the optical signal receiving module for a long time. In the above two cases, the transmission belt slippage detection component can determine that the transmission belt is slipping.

[0055] The belt slip detection assembly promptly detects belt slippage, preventing the output end of the drive motor (i.e., the drive motor's shaft) from rubbing against a portion of the belt. This could lead to localized heating of the belt, potentially leading to fire or belt breakage. The belt slip detection assembly also promptly notifies the user when the belt needs to be replaced or the load in the laundry tub needs to be reduced.

[0056] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0057] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0058] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0059] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow from the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0060] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A transmission belt slip detection assembly, characterized in that: include: A reflective mark (4), the reflective mark (4) being arranged on the driven wheel (2) in the transmission belt slippage detection assembly; An optical signal transmitting module (5) for transmitting an optical signal to the reflective marker (4); An optical signal receiving module (6) for receiving an optical signal reflected by the reflective marker (4); A processor, for determining whether the transmission belt (3) is slipping based on a time pattern of the optical signal receiving module (6) receiving the optical signal; The time rules include: The duration of the optical signal receiving module (6) receiving the optical signal, and the interval between two adjacent optical signals received by the optical signal receiving module (6).

2. The transmission belt slippage detection assembly according to claim 1, characterized in that: The determining whether the transmission belt (3) is slipping based on the time regularity of the optical signal receiving module (6) receiving the optical signal comprises: Under the preset rotation speed condition, if the duration of the optical signal receiving module (6) receiving the optical signal is less than or equal to the preset duration, or if the interval between two adjacent optical signals received by the optical signal receiving module (6) is less than or equal to the preset interval, it is determined that the transmission belt (3) does not slip; Under the preset rotation speed condition, if the duration of the optical signal receiving module (6) receiving the optical signal is longer than the preset duration, or if the interval between two adjacent optical signals received by the optical signal receiving module (6) is longer than the preset interval, it is determined that the transmission belt (3) is slipping.

3. The transmission belt slippage detection assembly according to claim 2, characterized in that: The optical signal receiving module (6) comprises a photoresistor (601), a voltage dividing resistor (602) and a voltage source (603) connected in series; When the photoresistor (601) receives the light signal reflected by the reflective mark (4), the resistance value decreases; when the photoresistor (601) does not receive the light signal reflected by the reflective mark (4), the resistance value increases; the change in the resistance value of the photoresistor (601) can cause a voltage pulse at both ends of the photoresistor (601); The preset duration is designed to be: the duration of the voltage pulse when the transmission belt (3) does not slip; The preset interval duration is designed to be the interval duration between two adjacent voltage pulses when the transmission belt (3) does not slip.

4. The transmission belt slippage detection assembly according to claim 3, characterized in that: The processor includes: A voltage pulse acquisition module, wherein the processor acquires the voltage pulses at both ends of the photoresistor (601) through the voltage pulse acquisition module, and determines the time regularity based on the acquired voltage pulses.

5. The transmission belt slippage detection assembly according to claim 2, characterized in that: The reflective mark (4) is arranged at a position on the outer peripheral wall of the driven wheel (2) that does not contact the transmission belt (3).

6. The transmission belt slippage detection assembly according to claim 5, characterized in that: The length of the reflective mark (4) along the outer peripheral wall direction of the driven wheel (2) is W; The output end speed of the driving motor (1) for driving the driven wheel (2) to rotate is N rpm; The output end of the drive motor (1) is connected to the driven wheel (2) through the transmission belt (3), and the transmission ratio of the output end of the drive motor (1) to the driven wheel (2) is P; The radius of the driven wheel (2) is R, and the time required for one rotation is 60 / (N / p) seconds; Wherein, the preset duration = T1 seconds + (W / 2πR) × [60 / (N / p)] seconds, where T1 is the duration of the duration margin; The preset interval duration=T2 seconds+60 / (N / p) seconds, where T2 is the interval margin duration.

7. A clothes processing device, characterized in that: include: The transmission belt slip detection assembly according to any one of claims 1 to 6; A clothes processing drum is fixedly connected to the driven wheel (2) in the transmission belt slippage detection assembly.

8. The clothes processing device according to claim 7, characterized in that: The optical signal transmitting module (5) and the optical signal receiving module (6) are both arranged on a main control board (7) of the clothing processing device, and the main control board (7) is electrically connected to the optical signal transmitting module (5) and the optical signal receiving module (6).

9. A method for detecting transmission belt slippage, characterized in that: Used to control the transmission belt slippage detection component according to any one of claims 1 to 6, or used to control the clothing processing device according to any one of claims 7 to 8; the method comprises: Determining whether the transmission belt (3) is slipping according to whether the duration of the optical signal receiving module (6) receiving the optical signal is greater than a preset duration, or whether the interval duration of the optical signal receiving module (6) receiving the optical signal is greater than a preset interval duration; If the duration of the optical signal receiving module (6) receiving the optical signal is longer than the preset duration, or the interval duration of the optical signal receiving module (6) receiving the optical signal is longer than the preset interval duration, it is determined that the transmission belt (3) is slipping; Otherwise, it is determined that the transmission belt (3) is not slipping.

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