Control assembly, drying device and clothes processing equipment

Abstract

The utility model provides a control assembly, a drying device and clothes processing equipment, and the control assembly comprises a motor; the power supply terminal comprises a first terminal and a second terminal, and the second terminal is electrically connected with the motor; the sampling circuit is electrically connected with the first terminal and the second terminal and used for converting the alternating voltage output by the power supply terminal into sampling voltage; the input end of the control circuit is electrically connected with the output end of the sampling circuit, the control circuit is used for outputting a wave loss signal under the condition that the sampling voltage is greater than or equal to a preset voltage, and the preset voltage is determined according to the working environment temperature of the motor; the control end of the wave-losing circuit is electrically connected with the output end of the control circuit, the input end of the wave-losing circuit is electrically connected with the first terminal, the output end of the wave-losing circuit is electrically connected with the motor, and the wave-losing circuit is used for connecting or disconnecting the electric connection between the first terminal and the motor according to the wave-losing signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent household appliances, in particular to a control assembly, a drying device and a clothes processing apparatus. BACKGROUND

[0002] The temperature of an alternating current motor rises during operation, and the temperature rise (the difference between the temperature of the motor and the temperature of the environment) of the alternating current motor is usually about 65 kelvin (K).

[0003] In a normal temperature working environment, the temperature of the alternating current motor is not easy to exceed the standard. However, when the temperature of the working environment of the alternating current motor is relatively high, the temperature of the alternating current motor has the risk of exceeding the standard, which can cause the alternating current motor to fail or work abnormally due to over-temperature. CONTENT OF THE INVENTION

[0004] The control assembly, the drying device and the clothes processing apparatus provided by the embodiments of the present application can avoid over-temperature failure or abnormal work of the alternating current motor without adding additional temperature detection devices.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a control assembly is provided, comprising: a motor; a power supply terminal including a first terminal and a second terminal, the second terminal being electrically connected to the motor; a sampling circuit electrically connected to the first terminal and the second terminal respectively, configured to convert alternating voltage output by the power supply terminal into a sampling voltage; a control circuit, an input end of the control circuit being electrically connected to an output end of the sampling circuit, configured to output a missing wave signal in the case that the sampling voltage is greater than or equal to a preset voltage, the preset voltage being a preset voltage determined according to an environmental temperature in which the motor works; and a missing wave circuit, a control end of the missing wave circuit being electrically connected to an output end of the control circuit, an input end of the missing wave circuit being electrically connected to the first terminal, and an output end of the missing wave circuit being electrically connected to the motor, the missing wave circuit being configured to turn on or turn off the electrical connection between the first terminal and the motor according to the missing wave signal.

[0007] In a possible implementation, the sampling circuit includes: a rectifier and a sub-circuit, wherein: an input end of the rectifier is electrically connected to the first terminal and the second terminal respectively, an output end of the rectifier is electrically connected to an input end of the sub-circuit, the rectifier is configured to convert the alternating voltage into a direct current voltage; an output end of the sub-circuit is electrically connected to an input end of the control circuit, the sub-circuit is configured to convert the direct current voltage into the sampling voltage, and the sampling voltage is less than the direct current voltage.

[0008] In a possible implementation, the output end of the rectifier includes a first output end and a second output end, the second output end is grounded, and the sub-circuit includes a first capacitor, a second capacitor, a first resistor, a second resistor, and a third resistor, wherein: the first capacitor is electrically connected to the first output end and the second output end respectively; one end of the first resistor is electrically connected to the first output end, and the other end of the first resistor is electrically connected to the second resistor and the third resistor respectively; the second resistor is further electrically connected to the second output end; the third resistor is further electrically connected to the input end of the control circuit and the second capacitor respectively; and the second capacitor is further electrically connected to the second output end.

[0009] In a possible implementation, the wave loss circuit includes: a first switching device, an isolator, and a second switching device, the isolator has a first input end, a second input end, a third output end, and a fourth output end, the first input end is used to supply power to the isolator, wherein: the control end of the first switching device is electrically connected to the output end of the control circuit, the input end of the first switching device is electrically connected to the second input end, and the output end of the first switching device is grounded; the third output end is electrically connected to the input end of the second switching device; the fourth output end is electrically connected to the control end of the second switching device; the input end of the second switching device is electrically connected to the first terminal, and the output end of the second switching device is electrically connected to the motor, and the second switching device is used to turn on or turn off the electrical connection between the first terminal and the motor in a first current direction and a second current direction, the first current direction is a direction in which current flows from the first terminal to the motor, and the second current direction is a direction in which current flows from the motor to the first terminal.

[0010] In a possible implementation, the wave loss circuit further includes: a fourth resistor, one end of the fourth resistor is electrically connected to the third output end, and the other end of the fourth resistor is electrically connected to the input end of the second switching device; and a fifth resistor, one end of the fifth resistor is electrically connected to the fourth output end, and the other end of the fifth resistor is electrically connected to the first terminal.

[0011] In a possible implementation, the wave loss circuit further includes: a sixth resistor, the sixth resistor is electrically connected to the first input end.

[0012] In a possible implementation, the alternating voltage output by the power supply terminal is an alternating voltage of a fixed frequency.

[0013] In a possible implementation, the control circuit is further configured to output a reference signal when the sampling voltage is less than a preset voltage, the reference signal and the wave loss signal are both pulse width modulation signals, and the duty cycle of the reference signal is greater than the duty cycle of the wave loss signal.

[0014] In a possible implementation, the control circuit includes a microprocessor, an input end of the microprocessor is electrically connected with an output end of the sampling circuit, and an output end of the microprocessor is electrically connected with an input end of the wave-dropping circuit; or, the control circuit includes: a voltage comparison circuit, an input end of the voltage comparison circuit is electrically connected with an output end of the sampling circuit, and an output end is electrically connected with an input end of the signal generator, and the voltage comparison circuit is configured to compare the size between the sampling voltage and the preset voltage; and the signal generator, an output end of the signal generator is electrically connected with an input end of the wave-dropping circuit, and the signal generator is configured to generate the wave-dropping signal.

[0015] In a second aspect, a drying device is provided, including: the control assembly according to the first aspect; a moisture-absorbing and regenerating runner connected with the motor, the motor drives the moisture-absorbing and regenerating runner to rotate; and a heater arranged on one side of the moisture-absorbing and regenerating runner, used for heating the moisture-absorbing and regenerating runner to desorb the moisture absorbed by the moisture-absorbing and regenerating runner.

[0016] In a third aspect, a laundry treatment apparatus is provided, including: an apparatus frame, a laundry containing bin, and the drying device according to the second aspect. The apparatus frame defines a containing space, the laundry containing bin is arranged in the containing space, and the drying device is fixed on the apparatus frame and located at a top side or a bottom side of the laundry containing bin. The air inlet and the air outlet of the laundry containing bin are respectively communicated with different regions of the drying device.

[0017] It can be understood that the laundry treatment apparatus can be a washing machine, a clothes dryer (or referred to as a clothes drying machine, or a clothes drying machine), or a washing and drying all-in-one machine (or referred to as a washing and drying all-in-one machine), etc.

[0018] In the embodiments of the present application, the sampling circuit converts the alternating voltage output by the power supply terminal into a sampling voltage, and outputs the sampling voltage to the control circuit, so that the control circuit can send a wave-dropping signal to the wave-dropping circuit when the sampling voltage is greater than or equal to the preset voltage, and then the wave-dropping circuit can perform wave-dropping processing on the electrical connection between the first terminal in the power supply terminal and the motor according to the wave-dropping signal, so as to reduce the average voltage output by the power supply terminal to the motor, and avoid over-temperature of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0020] Figure 1 is a module schematic diagram of a control assembly provided by the embodiments of the present application;

[0021] Figure 2is a structural schematic diagram of a control assembly provided by an embodiment of the present application;

[0022] Figure 3 is a wave loss processing principle schematic diagram provided by an embodiment of the present application;

[0023] Figure 4 is a module schematic diagram of a sampling circuit provided by an embodiment of the present application;

[0024] Figure 5 is a circuit connection schematic diagram of a sub-circuit provided by an embodiment of the present application;

[0025] Figure 6 is a module schematic diagram of a wave loss circuit provided by an embodiment of the present application;

[0026] Figure 7 is another module schematic diagram of a wave loss circuit provided by an embodiment of the present application;

[0027] Figure 8 is a circuit connection schematic diagram of a wave loss circuit provided by an embodiment of the present application;

[0028] Figure 9 is a module schematic diagram of a control circuit provided by an embodiment of the present application.

[0029] Legend of reference signs:

[0030] 10 - moisture absorption and regeneration runner, 101 - regeneration area, 102 - moisture absorption area, 20 - heater, 30 - motor, 40 - power supply terminal, 401 - first terminal, 402 - second terminal, 50 - sampling circuit, 501 - rectifier, 502 - sub-circuit, 5011 - first output terminal, 5012 - second output terminal, 60 - control circuit, 601 - voltage comparison circuit, 602 - signal generator, 70 - wave loss circuit, 701 - first switching device, 702 - isolator, 703 - second switching device, 7021 - first input terminal, 7022 - second input terminal, 7023 - third output terminal, 7024 - fourth output terminal, 7025 - light emitting diode, 7026 - light sensitive transistor. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the embodiments of the present application more apparent and comprehensible, the embodiments of the present application will be further described in detail below with reference to the drawings and specific embodiments. Obviously, the embodiments described in the specific embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0032] In order to facilitate understanding of the embodiments of the present application, the following points are explained before the embodiments of the present application are introduced.

[0033] 1. The scale of the drawings provided by the embodiments of the present application can be used as a reference in actual processes, but is not limited thereto. For example, the radius, thickness, and spacing between the heater and the moisture adsorption and regeneration runner of the moisture adsorption and regeneration runner can be adjusted according to actual implementation.

[0034] In addition, the embodiments of the present application involve open definitions, for example, including A but not limited to other elements in addition to A, which are uniformly described here and will not be described again below.

[0035] 2. In the embodiments of the present application, the descriptions such as “when”, “in the case of”, “if”, and “whether” all refer to the device or apparatus making corresponding processing under certain objective circumstances, and are not limited by time, and do not require the device or apparatus to have a judgment action when implemented, nor does it mean that there are other limitations.

[0036] 3. In the description of the embodiments of the present application, unless otherwise specified, “ / ” represents an “or” relationship between the objects before and after it, for example, A / B can represent A or B; “and / or” in the embodiments of the present application is only a description of the relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent: A alone, A and B together, and B alone, of which A and B can be singular or plural. In addition, in the description of the embodiments of the present application, unless otherwise specified, “multiple” means two or more than two. “At least one of the following” or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c, can represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, the same items or similar items with basically the same functions and effects are distinguished by using “first”, “second”, and the like in the embodiments of the present application. Those skilled in the art can understand that “first”, “second”, and the like do not limit the quantity and execution order, and “first”, “second”, and the like do not necessarily mean different. At the same time, in the embodiments of the present application, the words “exemplary” or “for example” are used to represent an example, illustration, or description. Any embodiment or design scheme described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words “exemplary” or “for example” are used to present the relevant concepts in a specific manner, and facilitate understanding.

[0037] 4. In the embodiments of the present application, the words "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", or "outer" and the like indicating the orientation or positional relationship of the components in the drawings are used only to facilitate the description of the drawings, and do not indicate or imply that the elements or structures referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the disclosed solutions of the embodiments of the present application.

[0038] In addition, the positional relationship of the components in the drawings can be appropriately changed according to the direction of each component described, and is not limited to the above-described positional relationship of the components in the drawings, which is uniformly described here and will not be described again below.

[0039] 5. In the embodiments of the present application, "parallel", "perpendicular", and "equal" include the described cases and similar cases to the described cases, and the range of the similar cases is within an acceptable deviation range. The acceptable deviation range is determined by the measurement being discussed and the error related to the measurement of a particular quantity (i.e., the limitations of the measurement system), for example. For example, "parallel" includes absolute parallel and approximate parallel, and the acceptable deviation range of approximate parallel can be within 5°, for example; "perpendicular" includes absolute perpendicular and approximate perpendicular, and the acceptable deviation range of approximate perpendicular can also be within 5°, for example. "Equal" includes absolute equality and approximate equality, and the acceptable deviation range of approximate equality can be that the difference between the two equalities is less than or equal to 5% of either, for example.

[0040] 6. In the embodiments of the present application, "about", "approximately", "substantially", or "approximately" include the described values and the average values within an acceptable deviation range of a particular value. The acceptable deviation range can be determined by the measurement being discussed and the error related to the measurement of a particular quantity (i.e., the limitations of the measurement system).

[0041] 7. In the embodiments of the present application, unless otherwise explicitly stated, the terms "mount", "adjacent", "connected", or "connected" and the like should be understood in a broad sense. For example, the term "connected" includes mechanical connection, electrical connection, and the like. In physical form, the above-mentioned mechanical connection, electrical connection, and the like can refer to direct connection, indirect connection through intermediate parts, or communication within two elements, and the like. In addition, the form of the above-mentioned connection includes fixed connection, detachable connection, or integral connection, and the like.

[0042] In other words, the above-mentioned terms in the embodiments of the present application can be specifically understood in the embodiments of the present application in combination with the related solutions provided by the embodiments of the present application.

[0043] 8. In the embodiments of this application, "electrical connection" includes the situation where constituent elements are connected together by a component having a certain electrical function. Furthermore, there are no particular limitations on the "component having a certain electrical function," as long as the connected constituent elements can transmit electrical signals or currents. For example, the component having a certain electrical function can be a conductive material or an electrical device with various functions. For example, conductive materials include electrodes, solder joints, or wiring. Similarly, electrical devices with various functions include resistors, capacitors, inductors, or semiconductor elements (such as diodes or transistors), etc., and are not limited thereto.

[0044] 9. The shapes involved in the embodiments of this application, such as circles, rectangles, triangles, or trapezoids, are not strictly circles, rectangles, triangles, or trapezoids. They can be approximate rectangles, triangles, or trapezoids. For example, there may be deformations caused by tolerances, or there may be chamfers, curved edges, or other deformations. This is explained in a unified manner here and will not be repeated below.

[0045] Firstly, such as Figure 1 As shown, this application embodiment provides a control component, including: a motor 30, a power supply terminal 40, a sampling circuit 50, a control circuit 60, and a drop signal circuit 70. The power supply terminal 40 includes a first terminal 401 and a second terminal 402. The second terminal 402 is electrically connected to the motor 30. The sampling circuit 50 is electrically connected to both the first terminal 401 and the second terminal 402. The sampling circuit 50 converts the AC voltage output from the power supply terminal 40 into a sampling voltage. The input terminal of the control circuit 60 is electrically connected to the output terminal of the sampling circuit 50. The control circuit 60 outputs a drop signal when the sampling voltage is greater than or equal to a preset voltage. The preset voltage is determined based on the ambient temperature of the motor 30. The control terminal of the drop signal circuit 70 is electrically connected to the output terminal of the control circuit 60. The input terminal of the drop signal circuit 70 is electrically connected to the first terminal 401. The output terminal of the drop signal circuit 70 is electrically connected to the motor 30. The drop signal circuit 70 is used to connect or disconnect the electrical connection between the first terminal 401 and the motor 30 based on the drop signal.

[0046] It should be understood that the motor 30 involved in the embodiments of this application is an AC motor, and the power supply is an AC power supply. This will be stated uniformly here and will not be repeated below.

[0047] It is understandable that if the ambient temperature is high when motor 30 is working, there is a risk of overheating during motor 30 operation, which may lead to motor 30 failure or abnormal operation.

[0048] For example, if the ambient temperature of the motor 30 is high (e.g., 60 degrees Celsius (°C)) and the voltage supplied to the motor 30 is high, the motor 30 may fail due to overheating or malfunction.

[0049] The following describes a case where the environment temperature in which the motor 30 operates is high.

[0050] It can be understood that in some household appliances, the environment temperature in which the motor 30 operates is high, for example, a dryer, a washer-dryer, an air conditioner, or an extractor hood, etc.

[0051] For the convenience of understanding, the following describes the case where the environment temperature in which the motor 30 operates is high. Figure 2 The following describes the case where the environment temperature in which the motor 30 operates is high.

[0052] Figure 2 is a structural schematic diagram of a control assembly provided by an embodiment of the present application. As shown in Figure 2 The control assembly provided in the first aspect further includes a moisture-absorbing and regenerating runner 10 and a heater 20. The moisture-absorbing and regenerating runner 10 is connected with the motor 30, and the motor 30 drives the moisture-absorbing and regenerating runner 10 to rotate. The heater 20 is arranged on one side of the moisture-absorbing and regenerating runner 10.

[0053] It can be understood that the heater 20 can heat the air on one side of the moisture-absorbing and regenerating runner 10, and then the moisture in the moisture-absorbing and regenerating runner 10 can be desorbed. The motor 30 can drive the moisture-absorbing and regenerating runner 10 to rotate, so that the water molecules in the moisture-absorbing and regenerating runner 10 are continuously desorbed, thereby achieving a drying effect.

[0054] For example, the moisture-absorbing and regenerating runner 10 can be divided into a regenerating area 101 and a moisture-absorbing area 102 by a sealing system inside. The heater 20 is arranged on the regenerating area 101. In the moisture-absorbing area 102, the moisture is adsorbed by the moisture-absorbing material in the moisture-absorbing and regenerating runner 10, and then is desorbed by the dry hot air heated by the heater 20. The two air flows act on the moisture-absorbing and regenerating runner 10 at the same time, and with the rotation of the moisture-absorbing and regenerating runner 10, the water molecules in the air at the moisture-absorbing area 102 are continuously adsorbed by the moisture-absorbing and regenerating runner 10 and are desorbed by the dry hot air at the regenerating area 101 and discharged, thereby achieving a drying effect.

[0055] In addition, the connection mode between the motor 30 and the moisture-absorbing and regenerating runner 10 can be gear transmission connection, belt transmission connection, or chain transmission connection, etc., which is not limited in the embodiments of the present application.

[0056] In addition, Figure 2 The placement direction of the moisture-absorbing and regenerating runner 10 in the above is only schematic, and the moisture-absorbing and regenerating runner 10 can also be placed horizontally, which is not limited in the embodiments of the present application.

[0057] That is, considering the above drying principle between the moisture absorption and regeneration runner 10, the heater 20 and the motor 30, the motor 30 is located near the moisture absorption and regeneration runner 10 and the heater 20, which causes the environment temperature to be high when the motor 30 works. This is especially true when the motor 30 is located directly above or below the moisture absorption and regeneration runner 10.

[0058] It can be understood that the motor 30 is located at the circumferential side of the moisture absorption and regeneration runner 10, and the motor 30 can drive the moisture absorption and regeneration runner 10 to rotate through some driving mechanism (for example, a belt) to achieve the drying function. However, since the driving mechanism is located at the circumferential side of the moisture absorption and regeneration runner 10, a larger power is usually required to drive the moisture absorption and regeneration runner 10 to rotate.

[0059] It should be understood that, in order to reduce the power required to drive the moisture absorption and regeneration runner 10 and improve the driving efficiency, the motor 30 can be arranged directly above or below the moisture absorption and regeneration runner 10. For example, as shown in Figure 2 , the motor 30 is located on the axis of rotation of the moisture absorption and regeneration runner 10, and directly drives the moisture absorption and regeneration runner 10 to rotate, which can reduce the power required to drive the moisture absorption and regeneration runner 10 to rotate.

[0060] In addition, in the case that the space in the axis direction of the rotation of the moisture absorption and regeneration runner 10 is limited (for example, when the moisture absorption and regeneration runner 10 is located directly above the washing drum of the washing machine, the space in the axis direction of the rotation of the moisture absorption and regeneration runner 10 is limited), the motor 30 is located directly above or below the moisture absorption and regeneration runner 10, which can compress the distance between the motor 30 and the moisture absorption and regeneration runner 10. In addition, considering that the moisture absorption and regeneration runner 10 can be regenerated only when it is heated by the heater 20 to a certain temperature (for example, above 70℃), which causes the environment temperature of the motor 30 to be high when the motor 30 works, the motor 30 should be strictly temperature-controlled to avoid over-temperature failure or abnormal work of the motor 30.

[0061] Based on this, the embodiments of the present application sample the alternating current power supply for supplying power to the motor 30 to obtain a sampling voltage, and compare the sampling voltage with a preset voltage. In the case that the sampling voltage exceeds the preset voltage, the motor 30 is processed by the wave loss circuit 70 to reduce the average voltage of the alternating current power supply input to the motor 30, so as to avoid over-temperature of the motor 30.

[0062] The principle of the wave loss processing of the above wave loss circuit 70 will be described below in combination with Figure 3 .

[0063] Figure 3 is a schematic diagram of a wave loss processing principle provided by the embodiments of the present application. As shown in Figure 3 , the wave loss circuit 70 is connected between the alternating current power supply and the motor 30, and the wave loss circuit 70 is connected to the motor 30 through a control circuit 60. Figure 3The voltage waveform shown in (a) of FIG. 1 is a voltage waveform of an alternating current power supply, which is a sinusoidal waveform, and a half cycle of the alternating current power supply is 10 milliseconds (ms). It can be understood that Figure 3 The waveform shown in (a) of FIG. 1 is a voltage waveform of the power supply of the motor 30.

[0064] It can be understood that the wave loss processing is to make the voltage waveform of the power supply of the motor 30 lost in a period of time, such as Figure 3 As shown in (b) of FIG. 1, the voltage waveform of the power supply of the motor 30 is lost in a half cycle (10 ms), so that the average voltage of the motor 30 can be reduced in a cycle, thereby avoiding over-temperature of the motor 30.

[0065] In a possible implementation, the alternating current voltage output by the power supply terminal 40 is an alternating current voltage of a fixed frequency.

[0066] It can be understood that the power supply of the motor 30 is an alternating current power supply of a fixed frequency, for example, a mains power supply with a voltage effective value of 220 volts (V) and a frequency of 50 hertz (Hz). In other words, the motor 30 in the embodiments of the present application is an alternating current motor of a fixed frequency, and the sampling circuit 50 collects an alternating current voltage which can be the voltage of the mains power supply. Here, it is uniformly described below and will not be described again.

[0067] In addition, the above-mentioned "the voltage of the power supply of the motor 30 is high" can refer to the voltage of the alternating current power supply at a certain moment or period, rather than the effective voltage.

[0068] For example, the first terminal 401 in the power supply terminal 40 is a fire line (or called hot line, phase line, etc.) terminal, and the second terminal 402 can be a zero line (or called ground line) terminal. Figure 3 The voltage shown in (a) of FIG. 1 can refer to the voltage difference between the first terminal 401 and the second terminal 402. In addition, Figure 3 The lost waveform shown in (b) of FIG. 1 can be achieved by cutting off the connection between the first terminal 401 and the motor 30.

[0069] That is, the power supply of the motor 30 is an alternating current power supply of a fixed frequency, by collecting the alternating current voltage of the alternating current power supply of the fixed frequency, obtaining the sampling voltage, and in the case that the sampling voltage is greater than or equal to the preset voltage, the connection between a certain terminal in the alternating current power supply and the motor 30 is subjected to wave loss processing, thereby avoiding over-temperature of the motor 30, so that the motor 30 can also work stably and reliably in the case that the ambient temperature is high.

[0070] It should be understood that the use of material cooling (for example, increasing the cooling fan) can avoid the motor 30 over-temperature failure or abnormal work, but will increase the cost and installation space, and further increase the difficulty of structural design. For example, the cooling fan is used to cool the motor 30, which will increase the cost of the cooling fan. In addition, due to the increase of the cooling fan, the installation space of the cooling fan is increased, and the difficulty of structural design is increased.

[0071] It should also be understood that the use of temperature sensors to detect the temperature of the motor 30 to perform the wave loss processing when the temperature of the motor 30 exceeds the preset temperature (for example, 135℃), thereby avoiding the motor 30 over-temperature failure or abnormal work, but will increase the cost. For example, the use of temperature sensors to detect the temperature of the motor 30 will increase the cost of the temperature sensor. In addition, the use of temperature sensors to detect the temperature of the motor 30 may increase the detection circuit for converting the output signal of the temperature sensor into a signal that can be recognized by the control circuit 60, thereby further increasing the cost of the circuit.

[0072] That is, using the above-mentioned collection of fixed frequency AC power supply AC voltage, and obtaining a sampling voltage according to the AC voltage, and performing wave loss processing on the motor 30 when the sampling voltage exceeds the preset voltage of the motor 30 over-temperature, can avoid the motor 30 over-temperature without increasing the cost and structural design difficulty.

[0073] The preset voltage is described below.

[0074] It should be understood that the preset voltage in the embodiment of the application is obtained by converting the AC voltage, and the preset voltage can be recognized by the control circuit 60. In addition, the preset voltage is a direct current voltage, and the AC voltage corresponding to the preset voltage can be understood as: the maximum AC voltage of the motor 30 over-temperature (i.e. the voltage when the motor 30 over-temperature failure or abnormal work) when the environmental temperature is the preset environmental temperature. Here, it is uniformly described, and the following will not be described.

[0075] It can be understood that the preset environmental temperature may be, for example, 50℃, 55℃, 60℃, 65℃, or 70℃, depending on the actual setting, and the embodiment of the application does not make specific limitation.

[0076] In addition, the preset voltage can be 2V, 2.5V, 3V, 3.5V, or 4V, depending on the actual, and the embodiment of the application does not make specific limitation.

[0077] For example, assuming that the AC voltage of 225V is the maximum AC voltage of the motor 30 over-temperature, and the direct current voltage after rectification of the AC voltage is 332V, then according to the sampling ratio (assuming 1%) of the sampling circuit 50, the preset voltage can be determined as 3.32V.

[0078] It should be understood that the maximum AC voltage when the motor 30 is overheated is 225V, which is only an example, and the maximum AC voltage when the motor 30 is overheated can be determined by experiment. For example, according to the actual use of the motor 30 (for example, the actual ambient temperature at which the motor 30 works), temperature field and temperature rise tests are performed in different AC voltage ranges, and a maximum AC voltage when the motor 30 is overheated is found according to the test results.

[0079] In addition, other experimental methods can also be used to determine the maximum AC voltage when the motor 30 is overheated, for example, by indirectly reflecting the temperature through the change of resistance or impedance, and combining the change of resistance or impedance under different AC voltages, the maximum AC voltage when the motor 30 is overheated is calculated, which is not limited in the embodiments of the present application.

[0080] It can be understood that since the sampling ratio of the sampling circuit 50 is different, the preset voltage can take different values, and the above-mentioned preset voltage is 3.32V, which is only an example, and the specific value depends on the actual setting. Here, it is uniformly described as follows, and the details are not repeated.

[0081] In one possible implementation, the control circuit 60 is further configured to output a reference signal when the sampling voltage is less than the preset voltage. The reference signal and the missing wave signal are both pulse width modulation (PWM) signals. The duty cycle of the reference signal is greater than the duty cycle of the missing wave signal.

[0082] It can be understood that according to the related description of (b) missing waveforms in Figure 4 When the sampling voltage is less than the preset voltage, the signal output by the control circuit 60 should control the missing wave circuit 70 to normally supply power to the motor 30, that is, the signal output by the control circuit 60 should maintain the normal output of the AC voltage waveform when the sampling voltage is less than the preset voltage. In addition, considering that the signal output by the control circuit 60 is a pulse width modulation signal, in order to ensure that the missing wave signal can make the missing wave circuit 70 lose waves, the duty cycle of the reference signal is greater than the duty cycle of the missing wave signal.

[0083] It should be understood that the duty cycle of the pulse width modulation signal refers to the proportion of the time that the high level occupies in a period.

[0084] That is, when the sampling voltage is less than the preset voltage, the control circuit 60 can output a reference signal to ensure the conduction between the first terminal 401 and the motor 30, so that the power supply terminal 40 can normally supply power to the motor 30.

[0085] It can be understood that the above is only an example, and the missing wave signal and the reference signal output by the control circuit 60 can also be other missing wave signals in addition to the pulse width modulation signal, which is not limited in the embodiments of the present application.

[0086] The sampling circuit 50, the wave-losing circuit 70 and the control circuit 60 are introduced respectively as follows.

[0087] For the sampling circuit 50

[0088] In a possible implementation, the sampling circuit 50 includes a rectifier 501 and a sub-circuit 502. The input terminals of the rectifier 501 are electrically connected to the first terminal 401 and the second terminal 402 respectively, and the output terminal of the rectifier 501 is electrically connected to the input terminal of the sub-circuit 502. The rectifier 501 is configured to convert an alternating voltage into a direct voltage. The output terminal of the sub-circuit 502 is electrically connected to the input terminal of the control circuit 60. The sub-circuit 502 is configured to convert the direct voltage into a sampling voltage, and the sampling voltage is less than the direct voltage.

[0089] An exemplary Figure 4 is a module schematic diagram of the sampling circuit provided by the embodiment of the present application. As shown in Figure 5 , the first terminal 401 and the second terminal 402 are input to the rectifier 501, the rectifier 501 rectifies the alternating voltage between the first terminal 401 and the second terminal 402 into a direct voltage, and inputs the direct voltage to the sub-circuit 502, and then the sub-circuit 502 can step down the direct voltage into a sampling voltage, so as to be recognized by the control circuit 60.

[0090] The sub-circuit 502 is further introduced as follows.

[0091] In a possible implementation, the output terminal of the rectifier 501 includes a first output terminal 5011 and a second output terminal 5012. The second output terminal 5012 is grounded. The sub-circuit 502 includes a first capacitor, a second capacitor C2, a first resistor, a second resistor and a third resistor. The first capacitor is electrically connected to the first output terminal 5011 and the second output terminal 5012 respectively. One end of the first resistor is electrically connected to the first output terminal 5011, and the other end of the first resistor is electrically connected to the second resistor and the third resistor respectively. The second resistor is further electrically connected to the second output terminal 5012. The third resistor is further electrically connected to the input terminal of the control circuit 60 and the second capacitor respectively. The second capacitor is further electrically connected to the second output terminal 5012.

[0092] An exemplary Figure 5 is a circuit connection schematic diagram of the sub-circuit provided by the embodiment of the present application. As shown in Figure 5 , the rectifier 501 can include four ports (two input terminals and two output terminals), and the first output terminal 5011 and the second output terminal 5012 output a direct voltage. The first output terminal 5011 can be a positive electrode, and the second output terminal 5012 can be a negative electrode. In addition, as shown in Figure 5 , the first capacitor is a capacitor C1, which is connected in parallel between the first output terminal 5011 and the second output terminal 5012, and is configured to decouple or smooth voltage fluctuation.

[0093] As shown in Figure 5 , the first resistors are two in number, namely resistor R1 and resistor R2, which can actually be 1, 3, or more, depending on the actual implementation, and the embodiments of the present application do not limit this. Figure 5

[0094] In addition, Figure 5 , the resistors R1 and R2 and the second resistor (i.e. resistor R3) are mainly used to step down the DC voltage, and the ratio between the DC voltage and the sampling voltage is determined according to the resistance values of the resistors R1, R2 and R3.

[0095] It can be understood that Figure 5 is only a schematic circuit diagram, and the sub-circuit 502 can adopt a circuit diagram other than Figure 5 to step down the DC voltage by connecting multiple resistors in series and / or in parallel, and the embodiments of the present application do not limit this.

[0096] As shown in Figure 5 , the third resistor (i.e. resistor R4) is mainly used for current limiting to avoid excessive current flowing into the control circuit 60.

[0097] As shown in Figure 5 , the second capacitor (i.e. capacitor C2) is mainly used for filtering to provide a stable voltage for the control circuit 60.

[0098] It should be understood that Figure 6 the sub-circuit shown is only an exemplary circuit diagram, and other step-down circuits can also be used, and the embodiments of the present application do not limit this.

[0099] For the wave loss circuit 70

[0100] ​In one possible implementation, the filtering circuit 70 includes a first switching device 701, an isolator 702, and a second switching device 703. The isolator 702 has a first input terminal 7021, a second input terminal 7022, a third output terminal 7023, and a fourth output terminal 7024. The first input terminal 7021 supplies power to the isolator 702. The control terminal of the first switching device 701 is electrically connected to the output terminal of the control circuit 60. The input terminal of the first switching device 701 is electrically connected to the second input terminal 7022. The output terminal of the first switching device 701 is grounded. The third output terminal 7023 is electrically connected to the input terminal of the second switching device 703. The fourth output terminal 7024 is electrically connected to the control terminal of the second switching device 703. The input terminal of the second switching device 703 is electrically connected to a first terminal 401. The output terminal of the second switching device 703 is electrically connected to a motor 30. The second switching device 703 is used to connect or disconnect the electrical connection between the first terminal 401 and the motor 30 in a first current direction and a second current direction. The first current direction is the direction in which the current flows from the first terminal 401 to the motor 30. The second current direction is the direction in which the current flows from the motor 30 to the first terminal 401.

[0101] It is understood that the first switching device 701 may be, for example, a transistor or a field-effect transistor, and this application embodiment does not specifically limit it.

[0102] In addition, the isolator provides electrical isolation between the DC transmission control circuit 60 and the AC transmission first terminal 401, ensuring electrical safety. For example, the isolator can be an optocoupler or a solid-state relay, etc., and this application embodiment does not specifically limit it.

[0103] Furthermore, considering the bidirectional nature of current flow in AC power, the second switching device 703 is a switching device with bidirectional conduction function, such as a bidirectional thyristor.

[0104] For example, Figure 6 This is a schematic diagram of a waveform dropping circuit provided in an embodiment of this application. Figure 6 As shown, the first switching device 701 includes three ports (i.e., a control terminal, an input terminal, and an output terminal). The control terminal of the first switching device 701 is electrically connected to the output terminal of the control circuit 60, thereby allowing the first switching device 701 to receive dropped signals from the control circuit 60, and thus turn the first switching device 701 on or off, for example, turning on or off the electrical connection between the input terminal and the output terminal of the first switching device 701. Additionally, the output terminal of the first switching device 701 is grounded, and its input terminal is electrically connected to the second input terminal 7022 of the isolator 702.

[0105] like Figure 7As shown, the first input end 7021 of the isolator 702 can access a 12V DC voltage power supply, thereby supplying power for the isolator 702. The third output end 7023 of the isolator 702 is electrically connected with the input end of the second switching device 703, and the input end of the second switching device 703 is also electrically connected with the motor 30.

[0106] In addition, the fourth output end 7024 is electrically connected with the control end of the second switching device 703, so that the input end of the second switching device 703 is electrically connected with the first terminal 401.

[0107] In a possible implementation, the wave-trap circuit 70 further includes a fourth resistor and a fifth resistor. One end of the fourth resistor is electrically connected with the third output end 7023, and the other end of the fourth resistor is electrically connected with the input end of the second switching device 703. One end of the fifth resistor is electrically connected with the fourth output end 7024, and the other end of the fifth resistor is electrically connected with the first terminal 401.

[0108] It can be understood that the fourth resistor and the fifth resistor are used for voltage division and current limiting, so that the wave-trap circuit 70 can be protected by the fourth resistor 704 and the fifth resistor 705.

[0109] Exemplarily, Figure 7 is a module schematic diagram of another wave-trap circuit provided by the embodiment of the present application. As shown in Figure 7 , the fourth resistor is two resistors in series: resistor R5 and resistor R6. Actually, the fourth resistor can be 1, 3, or more, depending on the actual implementation, which is not limited in the embodiment of the present application.

[0110] In addition, as shown in Figure 6 , the fifth resistor (i.e., resistor R7) is connected in parallel between the fourth output end 7024 and the first terminal 401, which is mainly used to limit the voltage and current within an appropriate range to protect the second switching device 703.

[0111] It can be understood that, according to Figure 7 and Figure 8 , the conduction or cutoff of the first switching device 701 can control the conduction or cutoff of the isolator 702, the conduction or cutoff of the isolator 702 can control the conduction or cutoff of the second switching device 703, and the conduction or cutoff of the second switching device 703 can control the conduction or disconnection of the connection between the first terminal 401 and the motor 30, which will be described below based on Figure 8 .

[0112] Exemplarily, Figure 8 is a circuit connection schematic diagram of a wave-trap circuit provided by the embodiment of the present application. As shown in Figure 8As shown in FIG. 7, the first switching device 701 can be a transistor Q12, a control terminal (i.e. base) of the transistor Q12 is electrically connected to an output terminal of the control circuit 60, an input terminal (i.e. collector) of the transistor Q12 is electrically connected to the second input terminal 7022, and an output terminal (i.e. emitter) of the transistor Q12 is grounded.

[0113] As shown in FIG. 7, the isolator 702 can be an opto-coupler, which includes a light emitting diode 7025 and a photo transistor 7026. When the transistor Q12 is turned on, a current passes through the light emitting diode 7025, so that the light emitting diode 7025 emits light. The light emitted by the light emitting diode 7025 turns on the photo transistor 7026. In addition, when the transistor Q12 is turned off, no current passes through the light emitting diode 7025, so that the light emitting diode 7025 does not emit light, and the photo transistor 7026 is also turned off. Figure 8

[0114] As shown in FIG. 7, the second switching device 703 can be a triac TR8. When the photo transistor 7026 is turned on, the triac TR8 is turned on, so that the first terminal 401 (i.e. the live terminal AC-L) is connected to the motor 30. When the photo transistor 7026 is turned off, the triac TR8 is turned off, so that the live terminal AC-L is disconnected from the motor 30. Figure 8 In a possible implementation, the wave-trap circuit 70 further includes a sixth resistor. The sixth resistor is electrically connected to the first input terminal 7021.

[0115] It can be understood that the sixth resistor mainly performs current limiting, so that the current provided for the isolator 702 does not exceed the rated current. In addition, the power supply for the isolator 702 is a direct current power supply, which can be an independent power supply. Alternatively, the circuit board carrying the control circuit 60 in the drying device can also supply power to the isolator 702, and the embodiments of the present application do not make specific limitations hereon.

[0116] It should be understood that the connection mode between the sixth resistor (i.e. R8 in

[0117] ) and the first input terminal 7021 can be referred to Figure 8 , and will not be described here again. Figure 9

[0118] For the control circuit 60

[0119] Optionally, the control circuit 60 includes a microprocessor. An input terminal of the microprocessor is electrically connected to an output terminal of the sampling circuit 50. An output terminal of the microprocessor is electrically connected to an input terminal of the wave-trap circuit 70.

[0120] ​​In addition, the microprocessor can be a microprocessor unit (MPU), a microcontroller unit (MCU), or a field programmable gate array (FPGA), and the like, and the embodiments of the present application do not make specific limitations thereto.

[0121] It should be understood that the microprocessor described above can be a microprocessor included in the drying device, and then the logical judgment function and the function of generating the wave loss signal (for example, the pulse width modulation signal) of the microprocessor can be reused on this basis.

[0122] Alternatively, the control circuit includes a voltage comparison circuit 601 and a signal generator 602. The input end of the voltage comparison circuit 601 is electrically connected with the output end of the sampling circuit 50, and the output end is electrically connected with the input end of the signal generator 602. The voltage comparison circuit 601 is used to compare the size between the sampling voltage and the preset voltage. The output end of the signal generator 602 is electrically connected with the input end of the wave loss circuit 70. The signal generator 602 is used to generate the wave loss signal.

[0123] It can be understood that the signal generator 602 is also used to generate the reference signal.

[0124] It should be understood that in the case that the drying device does not have a microprocessor, the voltage comparison circuit 601 and the signal generator 602 can be used to replace the control circuit 60.

[0125] Exemplarily, Figure 9 is a schematic diagram of a module of a control circuit provided by the embodiments of the present application. As shown in Figure 2 , the input end of the voltage comparison circuit 601 is electrically connected with the output end of the sampling circuit 50, and the other end is electrically connected with the input end of the signal generator 602. The output end of the signal generator 602 is electrically connected with the control end of the wave loss circuit 70.

[0126] In a second aspect, the embodiments of the present application provide a drying device, which includes the control assembly as described in the first aspect; a moisture absorption and regeneration runner 10 connected with a motor 30, the motor 30 drives the moisture absorption and regeneration runner 10 to rotate; and a heater 20 arranged on one side of the moisture absorption and regeneration runner 10, used to heat the moisture absorption and regeneration runner 10 to make the moisture absorbed by the moisture absorption and regeneration runner 10 desorb.

[0127] It can be understood that the related structures of the drying device provided in the second aspect can be referred to the related descriptions of Figure 2 and ​ , which are uniformly described here, and the following will not be described in detail.

[0128] In addition, the drying device provided in the second aspect can be a drying device in some household appliances, such as a washing machine, a clothes dryer, a washer-dryer, or a mop, and the like, and the embodiments of the present application do not make specific limitations thereto.

[0129] In the third aspect, the embodiments of the present application provide a clothes processing device, comprising: a device frame, a clothes containing bin, and a drying device as described in the second aspect. The device frame defines a containing space, the clothes containing bin is arranged in the containing space, and the drying device is fixed on the device frame and located at the top side or the bottom side of the clothes containing bin. The air inlet and the air outlet of the clothes containing bin are respectively communicated with different regions of the drying device. It can be understood that the clothes processing device can be a washing machine, a clothes dryer (also referred to as a clothes drying machine or a clothes dryer), or a washer-dryer (also referred to as a washer-dryer), and the like, and the present application does not make specific limitations thereto.

[0130] In the embodiments of the present application, the sampling circuit 50 converts the alternating voltage output by the power supply terminal 40 into a sampling voltage and outputs the sampling voltage to the control circuit 60, so that the control circuit 60 can send a wave loss signal to the wave loss circuit 70 when the sampling voltage is greater than or equal to the preset voltage, and then the wave loss circuit 70 can perform wave loss processing on the electrical connection between the first terminal 401 in the power supply terminal 40 and the motor 30 according to the wave loss signal, so as to reduce the average voltage output by the power supply terminal 40 to the motor 30 and avoid over-temperature of the motor 30.

[0131] It should be understood that the above embodiments are for the purpose of example and illustration only, and are not intended to limit the present application to the scope of the described embodiments. Furthermore, those skilled in the art can understand that the present application is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the embodiments of the present application, which all fall within the scope of the present application. The protection scope of the present application is defined by the attached claims and their equivalent scope.

Claims

1. A control assembly comprising: The application relates to a power supply device for a motor, comprising: a motor; supply terminals including a first terminal and a second terminal, the second terminal being electrically connected to the motor; a sampling circuit electrically connected to the first terminal and the second terminal respectively, for converting alternating voltage output by the supply terminals into a sampling voltage; a control circuit, an input end of the control circuit being electrically connected to an output end of the sampling circuit, for outputting a wave loss signal when the sampling voltage is greater than or equal to a preset voltage, the preset voltage being determined according to an ambient temperature at which the motor operates; a wave loss circuit, a control end of the wave loss circuit being electrically connected to an output end of the control circuit, an input end of the wave loss circuit being electrically connected to the first terminal, and an output end of the wave loss circuit being electrically connected to the motor, the wave loss circuit being used for turning on or off the electrical connection between the first terminal and the motor according to the wave loss signal.

2. The control assembly of claim 1, wherein, The sampling circuit comprises a rectifier and a sub-circuit, wherein: an input end of the rectifier is electrically connected to the first terminal and the second terminal respectively, an output end of the rectifier is electrically connected to an input end of the sub-circuit, and the rectifier is used for converting the alternating voltage into direct current voltage; an output end of the sub-circuit is electrically connected to an input end of the control circuit, and the sub-circuit is used for converting the direct current voltage into the sampling voltage, the sampling voltage being less than the direct current voltage.

3. The control assembly of claim 2, wherein, The output end of the rectifier comprises a first output end and a second output end, the second output end being grounded, and the sub-circuit comprises a first capacitor, a second capacitor, a first resistor, a second resistor and a third resistor, wherein: the first capacitor is electrically connected to the first output end and the second output end respectively; one end of the first resistor is electrically connected to the first output end, and the other end of the first resistor is electrically connected to the second resistor and the third resistor respectively; the second resistor is also electrically connected to the second output end; the third resistor is also electrically connected to the input end of the control circuit and the second capacitor respectively; the second capacitor is also electrically connected to the second output end.

4. The control assembly of any one of claims 1-3, wherein, The wave loss circuit comprises a first switching device, an isolator and a second switching device, the isolator having a first input end, a second input end, a third output end and a fourth output end, the first input end being used for supplying power to the isolator, wherein: a control end of the first switching device is electrically connected to an output end of the control circuit, an input end of the first switching device is electrically connected to the second input end, and an output end of the first switching device is grounded; the third output end is electrically connected to an input end of the second switching device; the fourth output end is electrically connected to a control end of the second switching device; an input end of the second switching device is electrically connected to the first terminal, and an output end of the second switching device is electrically connected to the motor, the second switching device being used for turning on or off the electrical connection between the first terminal and the motor in a first current direction and a second current direction, the first current direction being a direction in which current flows from the first terminal to the motor, and the second current direction being a direction in which current flows from the motor to the first terminal.

5. The control assembly of claim 4, wherein, The wave loss circuit further comprises: a fourth resistor, one end of which is electrically connected to the third output end, and the other end of which is electrically connected to the input end of the second switching device; a fifth resistor, one end of which is electrically connected to the fourth output end, and the other end of which is electrically connected to the first terminal.

6. The control assembly of claim 4, wherein, The wave loss circuit further comprises: a sixth resistor, which is electrically connected to the first input end.

7. The control assembly of claim 4, wherein, The AC voltage output by the power supply terminal is an AC voltage of a fixed frequency.

8. The control assembly of any one of claims 1-3, wherein, The control circuit is further configured to output a reference signal when the sampling voltage is less than the preset voltage, the reference signal and the wave loss signal are both pulse width modulation signals, and the duty cycle of the reference signal is greater than the duty cycle of the wave loss signal.

9. The control assembly according to any one of claims 1 to 3, wherein, The control circuit comprises a microprocessor, an input end of the microprocessor is electrically connected to an output end of the sampling circuit, and an output end of the microprocessor is electrically connected to an input end of the wave loss circuit. Alternatively, the control circuit comprises a voltage comparison circuit and a signal generator, an input end of the voltage comparison circuit is electrically connected to an output end of the sampling circuit, an output end of the voltage comparison circuit is electrically connected to an input end of the signal generator, the voltage comparison circuit is configured to compare the size between the sampling voltage and the preset voltage, an output end of the signal generator is electrically connected to an input end of the wave loss circuit, and the signal generator is configured to generate the wave loss signal.

10. A drying apparatus, characterized by, The control assembly comprises: The control assembly according to any one of claims 1 to 9; A moisture absorption and regeneration runner is connected to the motor, and the motor drives the moisture absorption and regeneration runner to rotate; A heater is arranged on one side of the moisture absorption and regeneration runner, and is used for heating the moisture absorption and regeneration runner to desorb the moisture absorbed by the moisture absorption and regeneration runner. 11.A laundry treating apparatus, characterized by, The drying device comprises: The drying device comprises: The drying device is fixed on the equipment frame and located on the top side or the bottom side of the clothes containing bin. The air inlet and the air outlet of the clothes containing bin are respectively communicated with different regions of the drying device.

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