Laundry treating apparatus and control method

Abstract

The present application belongs to the field of clothes treatment equipment, and particularly relates to a clothes treatment equipment and a control method. The clothes treatment equipment comprises a shell, a clothes treatment drum rotatably arranged in the shell, the clothes treatment drum comprising a first electrode arranged along a circumferential direction of the clothes treatment drum, a lifting rib arranged on an inner wall of the clothes treatment drum, the lifting rib being internally provided with a receiving cavity, a second electrode arranged in the receiving cavity, and a power supply unit comprising two connecting terminals, the two connecting terminals being electrically coupled with the first electrode and the second electrode respectively, so as to pass current through the first electrode and the second electrode to determine drying of clothes in the clothes treatment drum. The present application can improve the drying accuracy of clothes in the drying process, and solve the problems of over-drying of clothes, misjudgment of drying, and long drying time when the drum is empty.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of clothes treatment equipment, and particularly relates to a clothes treatment equipment and a control method. BACKGROUND

[0002] Generally, the dryness judging device of the clothes dryer adopts a contact type bimetallic strip dryness judging device. The bimetallic strip is installed on a structural member near the lower side of the front door body of the clothes dryer. During the drying process, clothes are placed on the bimetallic strip to form an electric circuit. The voltage at both ends of the bimetallic strip is different when clothes of different drying degrees form the circuit. The controller judges whether the clothes are completely dried by collecting the voltage at both ends of the bimetallic strip. However, the contact type bimetallic strip dryness judging device has the following disadvantages:

[0003] 1. The bimetallic strip is installed at the front end of the drum. When the amount of clothes to be dried is small, the probability of the clothes touching the bimetallic strip is small, which leads to a large deviation between the data collected by the controller and the data corresponding to the actual drying degree, especially when the drum is empty. Even if there is no clothes, the clothes dryer still needs to spend a long time to judge and stop.

[0004] 2. During the drying process, the clothes dryer takes in air from the front end or the rear end of the drum, which may cause uneven drying of the clothes, especially when there are many clothes. The installation of a single dryness judging device at the front end of the drum may lead to inaccurate dryness judging.

[0005] 3. When large clothes are bunched, the outside of the clothes is dry while the inside is still wet. At this time, the use of the bimetallic strip to judge the dryness may lead to misjudgment. SUMMARY

[0006] In view of this, the present application provides a clothes treatment equipment and a control method to improve the dryness judging accuracy during the drying process of clothes.

[0007] The present application provides a clothes treatment equipment, which comprises:

[0008] a housing;

[0009] a clothes treatment drum rotatably arranged in the housing, the clothes treatment drum comprising a first electrode arranged along a circumferential direction of the clothes treatment drum;

[0010] a lifting rib arranged on an inner wall of the clothes treatment drum, the lifting rib being provided with a receiving cavity;

[0011] a second electrode arranged in the receiving cavity;

[0012] a power supply unit comprising two wiring terminals, the two wiring terminals being electrically coupled with the first electrode and the second electrode respectively, so as to judge the dryness of clothes in the clothes treatment drum by electrifying the first electrode and the second electrode.

[0013] Further optionally, the first electrode comprises at least a part of a drum wall of the laundry treating drum.

[0014] Further optionally, the two connection terminals comprise two conductive rings, the two conductive rings are spaced apart along an axial direction of the laundry treating drum and fixed to an outer periphery of the laundry treating drum, a first conductive ring of the two conductive rings is connected with the first electrode, a second conductive ring of the two conductive rings is connected with the second electrode, and rotation of the laundry treating drum can drive the first conductive ring and the second conductive ring to rotate.

[0015] The power supply unit further comprises two power supply terminals, the two power supply terminals are arranged one-to-one corresponding to the two conductive rings, the power supply terminals are designed to be in contact with the corresponding conductive rings when the laundry treating drum rotates, and an electric current path is formed between the power supply terminals and the corresponding conductive rings to supply power to the first electrode and the second electrode.

[0016] Further optionally, the first conductive ring is directly connected with the laundry treating drum, and an insulating layer is arranged between the second conductive ring and the laundry treating drum and between the first conductive ring and the second conductive ring, respectively.

[0017] Further optionally, the power supply terminals comprise conductive pulleys, the conductive pulleys can abut against the corresponding conductive rings and synchronously rotate reversely relative to the corresponding conductive rings when the laundry treating drum rotates.

[0018] Further optionally, the conductive pulley comprises a bearing and a wheel body, an inner ring of the bearing is fixed in the housing at a position opposite to the conductive ring, and the wheel body is fixed to an outer ring of the bearing, and the wheel body abuts against the conductive ring.

[0019] Further optionally, the conductive pulley further comprises a plurality of springs, the plurality of springs are arranged between the wheel body and the outer ring of the bearing and spaced apart along a circumferential direction of the outer ring of the bearing, one end of the spring is connected with the wheel body, and the other end of the spring is connected with the outer ring of the bearing.

[0020] Further optionally, the laundry treating drum comprises:

[0021] a front drum portion, the front drum portion is provided with a laundry feeding opening, and the two conductive rings are located in the front drum portion.

[0022] Two support assemblies are arranged in the housing at positions corresponding to the front barrel portion and are located at the bottom of the front barrel portion on both sides for supporting the front barrel portion, the support assembly comprises a fixed shaft and a support wheel rotatably arranged on the fixed shaft, and at least one of the two conductive pulleys is rotatably fixed to the fixed shaft.

[0023] Further optionally, a plurality of the lifting ribs are arranged at intervals along the circumferential direction of the clothes treatment drum, and each of the lifting ribs is provided with one electric device, and at least one of the electric devices is the second electrode.

[0024] Further optionally, the clothes treatment device further comprises a temperature sensor arranged on the inner wall of the clothes treatment drum for detecting the temperature of the clothes.

[0025] The embodiment of the present application provides a drying control method of a clothes treatment device with a drying function, the drying control method is used for controlling the clothes treatment device with the drying function, and the drying control method comprises the following steps:

[0026] Obtaining a capacitance value between the first electrode and the second electrode, and obtaining the temperature of the clothes in the clothes treatment drum;

[0027] Performing AD value conversion and AD value compensation according to the capacitance value and the temperature of the clothes;

[0028] Determining whether the clothes in the clothes treatment drum are dried according to the AD conversion value.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The present application provides a clothes treatment device and a control method, the clothes treatment device comprises a power supply unit, the power supply unit comprises two wiring terminals, the two wiring terminals are electrically coupled with a first electrode and a second electrode respectively, so as to determine whether the clothes in the clothes treatment drum are dried by electrifying the first electrode and the second electrode, the present application can improve the drying accuracy of the clothes, and solve the problems of over-drying, misjudgment of drying and long drying time when the drum is empty. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0032] The structures, proportions, sizes, etc. shown in the specification are merely used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the conditions that can be implemented by the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application.

[0033] Figure 1 Structure diagram of the laundry treatment device of the embodiment of the present application;

[0034] Figure 2 Positional schematic diagram of the conductive pulley and the laundry treatment drum of the embodiment of the present application;

[0035] Figure 3 Structure schematic diagram of the conductive pulley of the embodiment of the present application;

[0036] Figure 4 Assembly schematic diagram of the electrode, the conductive pulley, the conductive ring and the laundry treatment drum of the embodiment of the present application;

[0037] Figure 5 Flow chart of the drying judgment of the embodiment of the present application. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two, but does not exclude the case of including at least one.

[0040] It should be understood that the term "and / or" used herein is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0041] It is also to be noted that the terms "comprising", "containing", or any other similar term as used herein are intended to encompass the inclusion of one or more elements, steps, or components, but not the exclusion of any other elements, steps, or components. In other words, these terms are intended to be interpreted inclusively rather than exclusively.

[0042] Embodiment 1

[0043] The embodiment 1 of the present application provides a clothes treatment device with drying function, the clothes treatment device comprises a shell, a clothes treatment drum 1 rotatably arranged in the shell, the clothes treatment drum 1 can be placed vertically or laterally, the clothes treatment drum 1 comprises a first electrode 2A arranged along the circumferential direction of the clothes treatment drum 1, a lifting rib 3 arranged on the inner wall of the clothes treatment drum 1, the lifting rib 3 is internally provided with a receiving cavity, a second electrode 2B which is a stainless steel cylindrical surface arranged in the receiving cavity, the outer shape of the lifting rib 3 is unchanged after the second electrode 2B is installed, and a power supply unit comprising two wiring terminals, the two wiring terminals are electrically coupled with the first electrode 2A and the second electrode 2B respectively, so as to pass current to the first electrode 2A and the second electrode 2B to dry the clothes in the clothes treatment drum 1, and the drying device is preferably a capacitive dryness sensor.

[0044] Optionally, in an implementation manner of the embodiment, the clothes treatment drum is a metal drum, and the first electrode 2A at least comprises a part of the drum wall of the clothes treatment drum 1.

[0045] Optionally, in an implementation manner of the embodiment, as shown in Figure 1 two conductive rings, the first conductive ring 4A in the two conductive rings is directly connected with the first electrode 2A, and the second conductive ring 4B in the two conductive rings is connected with the second electrode 2B through a wire, preferably there is a wire on the outside of the clothes treatment drum 1 which axially connects the second conductive ring 4B with the second electrode 2B, so as to conduct the second conductive ring 4B and the second electrode 2B, and the rotation of the clothes treatment drum 1 can drive the first conductive ring 4A and the second conductive ring 4B to rotate. The power supply unit further comprises two power supply terminals, the two power supply terminals are arranged one by one corresponding to the two conductive rings, the power supply terminal is designed to be in contact with the corresponding conductive ring when the clothes treatment drum 1 rotates, and an electric current path is formed between the power supply terminal and the corresponding conductive ring to supply power to the first electrode 2A and the second electrode 2B.

[0046] Optionally, in an implementation form of the present embodiment, the first conductive ring 4A is directly connected with the clothes treatment drum 1 and is in a conductive state, and an insulating layer is arranged between the second conductive ring 4B and the clothes treatment drum 1 and between the first conductive ring 4A and the second conductive ring 4B, and the first conductive ring 4A and the second conductive ring 4B are not in a conductive state with each other.

[0047] Optionally, in an implementation form of the present embodiment, as shown in Figure 2 the power supply terminal comprises a conductive pulley 5, which is rotatably fixed at any position opposite to the corresponding conductive ring in the shell, for example, the conductive pulley 5 can be fixed at the upper part, side part or bottom part of the clothes treatment drum 1, the conductive pulley 5 abuts against the corresponding conductive ring, the conductive pulley 5 can rotate reversely synchronously relative to the corresponding conductive ring, and the conductive pulley 5 and the conductive ring belong to drum friction, and the conductive ring has smaller power resistance and noise and is more wear-resistant compared with traditional sliding friction.

[0048] Optionally, in an implementation form of the present embodiment, as shown in Figure 3 the conductive pulley 5 comprises a bearing 6 and a wheel body 7, the inner ring of the bearing 6 is fixed at a position opposite to the conductive ring in the shell, and the wheel body 7 is fixed at the outer ring of the bearing 6, and the wheel body 7 abuts against the conductive ring.

[0049] Optionally, in an implementation form of the present embodiment, the conductive pulley 5 further comprises a plurality of springs 8, the plurality of springs 8 are arranged between the wheel body 7 and the outer ring of the bearing 6 and are arranged in a circumferential direction of the outer ring of the bearing 6 at intervals, one end of the spring 8 is connected with the wheel body 7, and the other end is connected with the outer ring of the bearing 6, when the bearing 6 remains stationary, the wheel body 7 can move within a certain range, so as to ensure the close contact between the wheel body 7 and the conductive ring and ensure the conductive state of the two. In addition, the outer ring of the bearing 6 and the inner ring of the bearing 6 are provided with metal balls, and the inner ring of the bearing 6, the metal balls and the outer ring of the bearing 6 are also in a conductive state.

[0050] Optionally, in an implementation form of the present embodiment, as shown in Figure 4As shown, the clothes treatment cylinder 1 comprises a front cylinder part provided with a clothes feeding opening, two conductive rings located in the front cylinder part, and two support assemblies arranged in the housing at positions corresponding to the front cylinder part and located at both sides of the bottom of the front cylinder part for supporting the front cylinder part, wherein each support assembly comprises a fixed shaft 9 and a support wheel rotatably arranged on the fixed shaft 9, the axis of the fixed shaft 9 is parallel to the axis of the clothes treatment cylinder 1, and at least one of the two conductive pulleys 5 is rotatably fixed to the fixed shaft 9, for example, one of the two conductive pulleys 5 is fixed to one of the fixed shafts 9, and the other is independently arranged, or the two conductive pulleys 5 are coaxially fixed to one of the fixed shafts 9, or the two conductive pulleys 5 are respectively fixed to the two fixed shafts 9. The inner ring of the bearing 6 of the conductive pulley 5 is preferably interference-fitted to the fixed shaft 9, the fixed shaft 9 can be made of metal, the inner ring of the bearing 6 is in a conductive state with the fixed shaft 9, and a terminal is welded to the outer end of the fixed shaft 9, which is connected to the controller 10 through a wire, and the supply voltage is preferably below 36V.

[0051] Optionally, in an implementation manner of the embodiment, the plurality of lifting ribs 3 are arranged at intervals along the circumferential direction of the clothes treatment cylinder 1, each lifting rib 3 is provided with one electric device, the power supply unit can supply power to the plurality of electric devices, and at least one electric device is the second electrode 2B.

[0052] Optionally, in an implementation manner of the embodiment, the clothes treatment device further comprises a temperature sensor 11 arranged on the inner wall of the clothes treatment cylinder 1 and connected to the controller 10, for detecting the temperature of the clothes.

[0053] Embodiment 2

[0054] Embodiment 2 of the present application provides a drying control method of a clothes treatment device with drying function, like Figure 5 As shown, the drying control method is used for controlling the clothes treatment device with drying function of embodiment 1, and the drying control method comprises the following steps:

[0055] obtaining the capacitance value between the first electrode 2A and the second electrode 2B, and obtaining the temperature of the clothes in the clothes treatment cylinder 1;

[0056] performing AD value conversion and AD value compensation according to the capacitance value and the temperature of the clothes;

[0057] determining whether the clothes in the clothes treatment cylinder 1 are dried according to the AD conversion value.

[0058] The capacitive dryness sensor adopts a pulse width modulation circuit. The circuit uses the charging and discharging principle of the sensor capacitor to change the duty cycle of the circuit output pulse with the change of the capacitive dryness sensor capacitor. Then, a direct current signal corresponding to the measured change is obtained through a low-pass filter, converted into a voltage signal through a load resistor, and finally sent to an AD converter for AD value conversion. AD value conversion refers to converting an analog quantity into a data quantity.

[0059] During drying, the clothes are in the medium cavity between the two plates of the capacitive dryness sensor. Due to the different water content of the clothes, the relative dielectric constant of the sensor changes, causing the capacitance value to change. Different dryness of clothes corresponds to different capacitance values, and different AD values are converted. According to the size of the AD value, the approximate range of the water content of the clothes can be obtained. The smaller the water content of the clothes, the smaller the measured capacitance value, and the smaller the converted AD value. Conversely, the same is true.

[0060] Temperature can compensate for capacitance value or directly compensate for AD value. For clothes with the same water content, when the temperature rises, the detected capacitance value will increase, the voltage will also increase, and the AD value will also increase. Therefore, the temperature should be kept constant as much as possible during measurement. However, the temperature of the clothes during drying is constantly changing, so the influence of temperature change on capacitance value needs to be eliminated to improve measurement accuracy. This requires a large number of experiments at different temperatures with the same water content to fit the influence law or curve of temperature on AD value. Then, the influence factor is superimposed on the AD value obtained from the capacitance value to achieve AD value compensation, which can be positive or negative.

[0061] When the water content of clothes of a certain material is 0 (at a certain temperature), according to the AD value conversion rule, the corresponding AD value at this time is recorded as M. During the drying process, the capacitive dryness sensor detects the capacitance value between the first electrode 2A and the second electrode 2B in real time, and the temperature sensor 11 detects the temperature of the clothes in real time. The controller 10 performs AD value conversion and AD value compensation according to the capacitance value and the temperature of the clothes. When the AD value ≤ M for a consecutive a minutes, the compressor stops, and the clothes treatment equipment ends after executing the cooling process. The value range of a is 2-20 min, and the value range of M is 0-1024.

[0062] The above specifically illustrates and describes the exemplary embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements within the spirit and scope of the appended claims.

Claims

1.A laundry treating apparatus having a drying function, characterized by, The laundry treating apparatus comprises: a housing; a laundry treating drum (1) rotatably arranged in the housing, the laundry treating drum (1) comprising a first electrode (2A) arranged along a circumferential direction of the laundry treating drum (1); a lifting rib (3) arranged on an inner wall of the laundry treating drum (1), the lifting rib (3) being provided with a receiving cavity; a second electrode (2B) arranged in the receiving cavity; a power supply unit comprising two terminal ends, the two terminal ends being electrically coupled with the first electrode (2A) and the second electrode (2B) respectively, so as to supply power to the first electrode (2A) and the second electrode (2B) by energizing the first electrode (2A) and the second electrode (2B) to dry laundry in the laundry treating drum (1); the two terminal ends comprise two conductive rings, the two conductive rings being spaced apart along an axial direction of the laundry treating drum (1) and fixed to an outer periphery of the laundry treating drum (1), and the laundry treating drum (1) is capable of driving a first conductive ring (4A) and a second conductive ring (4B) in the two conductive rings to rotate; the power supply unit further comprises two power supply terminals, the two power supply terminals being arranged in one-to-one correspondence with the two conductive rings; the power supply terminal comprises a conductive pulley (5), the conductive pulley (5) being capable of abutting against the corresponding conductive ring and synchronously and reversely rotating relative to the corresponding conductive ring when the laundry treating drum (1) rotates; the laundry treating drum (1) comprises: a front drum portion, the front drum portion being provided with a laundry feeding opening, and the two conductive rings being located in the front drum portion; two support assemblies arranged in the housing at positions corresponding to the front drum portion and located at two sides of a bottom of the front drum portion, the support assemblies being used for supporting the front drum portion, and each of the support assemblies comprising a fixed shaft (9) and a support wheel rotatably arranged on the fixed shaft (9), and at least one of the two conductive pulleys (5) being rotatably fixed to the fixed shaft (9). 2.The laundry treating apparatus with a drying function according to claim 1, characterized by, The first electrode (2A) comprises at least part of a drum wall of the laundry treating drum (1). 3.The laundry treating apparatus with a drying function according to claim 1 or 2, characterized in that, The first conductive ring (4A) is connected with the first electrode (2A), and the second conductive ring (4B) is connected with the second electrode (2B); The power supply terminal is designed to be capable of contacting the corresponding conductive ring when the laundry treating drum (1) rotates, and a current path is formed between the power supply terminal and the corresponding conductive ring to supply power to the first electrode (2A) and the second electrode (2B). 4.The laundry treating apparatus with a drying function according to claim 3, characterized by, The first conductive ring (4A) is directly connected with the laundry treating drum (1), and an insulating layer is arranged between the second conductive ring (4B) and the laundry treating drum (1) and between the first conductive ring (4A) and the second conductive ring (4B). 5.The laundry treating apparatus with a drying function as claimed in claim 1, wherein The conductive pulley (5) comprises a bearing (6) and a wheel body (7), an inner ring of the bearing (6) being fixed at a position in the housing opposite to the conductive ring, and the wheel body (7) being fixed to an outer ring of the bearing (6), and the wheel body (7) abutting against the conductive ring. 6.The laundry treating apparatus with a drying function according to claim 5, characterized by, The conductive pulley (5) further comprises a plurality of springs (8) arranged between the wheel body (7) and the outer ring of the bearing (6) and spaced along the circumferential direction of the outer ring of the bearing (6), one end of the spring (8) being connected to the wheel body (7) and the other end being connected to the outer ring of the bearing (6). 7.The laundry treating apparatus with a drying function as claimed in claim 1, wherein The plurality of lifting ribs (3) are spaced along the circumferential direction of the clothes treatment drum (1), and each lifting rib (3) is internally provided with an electric device, the power supply unit is capable of supplying power to the plurality of electric devices, and at least one electric device is the second electrode (2B). 8.The laundry treating apparatus with a drying function as claimed in claim 1, wherein, The clothes treatment device further comprises a temperature sensor (11) arranged on the inner wall of the clothes treatment drum (1) and used for detecting the temperature of clothes. 9.A drying control method of a laundry treating apparatus having a drying function, characterized by, The drying control method is used for controlling the clothes treatment device with a drying function according to any one of claims 1-8, and the drying control method comprises: obtaining the capacitance value between the first electrode (2A) and the second electrode (2B) and the temperature of clothes in the clothes treatment drum (1); performing AD value conversion and AD value compensation according to the capacitance value and the temperature of clothes; determining whether the clothes in the clothes treatment drum (1) are dried according to the AD conversion value.

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