Washing machine and method of detecting the same

Abstract

This application provides a washing machine and a detection method thereof. The washing machine includes: a cabinet with a receiving space; an inner tub disposed within the receiving space; a tub-in-tub for detachable installation within the inner tub, the tub-in-tub being coaxially arranged with the inner tub; a detection component for detecting the distance between itself and the bottom of the inner tub; and a controller electrically connected to the detection component. The controller is used to determine whether the tub-in-tub is installed within the inner tub based on the distance between the detection component and the bottom of the inner tub, and to determine whether the tub-in-tub is installed at an angle based on the detection status of the detection component. By using the detection component to detect the distance between itself and the bottom of the inner tub before the washing program starts, and thereby determining whether the tub-in-tub is installed within the inner tub, the occurrence of erroneous operation of the washing program without the tub-in-tub installed can be reduced, thus improving the safety performance of the washing machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of washing machines, and particularly relates to a washing machine and a detection method thereof. BACKGROUND

[0002] A pulsator washing machine is a washing machine in which water flow in a tub forms vortex flow that rotates right and left alternately to drive laundry to rotate and tumble, so that dirt on the laundry can be removed. A common pulsator washing machine usually has a capacity ranging from 5 kg to 10 kg. If such a pulsator washing machine is used to wash small-volume laundry such as underwear, silk scarves, socks, etc., problems of wasting water resources and wasting electric energy are likely to occur. Therefore, a tub-in-tub is provided, which is a washing tub that can be detachably installed on a pulsator. When small-volume laundry such as underwear, silk scarves, socks, etc. needs to be washed, the tub-in-tub can be used to save water and electric energy.

[0003] In this case, when a user uses the tub-in-tub, the tub-in-tub is sometimes installed, but a washing program without the tub-in-tub is mistakenly selected, which leads to abnormal use of the tub-in-tub and causes damage to the washing machine. SUMMARY

[0004] Embodiments of the present application provide a washing machine and a detection method thereof to reduce abnormal use of a tub-in-tub and improve safety performance and service life of the washing machine.

[0005] Embodiments of the present application provide a washing machine, which comprises:

[0006] a box body having a containing space;

[0007] an inner tub arranged in the containing space;

[0008] a tub-in-tub configured to be detachably installed in the inner tub, the tub-in-tub being coaxially arranged with the inner tub;

[0009] a detection assembly configured to detect a distance between the tub-in-tub and a bottom of the inner tub;

[0010] a controller electrically connected to the detection assembly, the controller being configured to determine whether the tub-in-tub is installed in the inner tub according to the distance between the detection assembly and the bottom of the inner tub, and determine whether the tub-in-tub is installed obliquely according to a detection state of the detection assembly.

[0011] Optionally, the washing machine further comprises a cover body rotatably connected to the box body to close or expose the containing space.

[0012] The detection assembly is arranged on a side of the cover body facing the containing space.

[0013] Optionally, the detection assembly comprises a transmitter and a receiver, the transmitter is configured to emit an ultrasonic signal towards the inner tub, and the receiver is configured to receive the ultrasonic signal reflected from the inner tub.

[0014] The transmitter and the receiver are electrically connected to the controller, the controller is configured to determine a target distance according to a time difference between the transmission and reception of the ultrasonic signal, determine whether the bucket is installed in the inner tub according to the target distance, and determine whether the bucket is installed obliquely according to a receiving state of the receiver.

[0015] Optionally, the transmitter is arranged on a side of the receiver away from the cover.

[0016] The cross-sectional area of the transmitter is smaller than that of the receiver.

[0017] Optionally, the washing machine comprises two detection assemblies, and the two detection assemblies are symmetrically arranged on the cover along an axis of the inner tub.

[0018] Optionally, a wire slot is formed in the cover.

[0019] The controller is arranged in the accommodation space, and a wire connected between the detection assembly and the controller is arranged at the wire slot and a rotating shaft connecting the cover and the box.

[0020] Optionally, the wire connected between the detection assembly and the controller in the accommodation space is sleeved with a protective sleeve and fixed to the box.

[0021] Embodiments of the present application also provide a detection method of a washing machine, comprising:

[0022] Obtaining a distance between a detection assembly and a bottom of an inner tub;

[0023] Determining whether a bucket is installed in the inner tub according to the distance between the detection assembly and the bottom of the inner tub, and determining whether the bucket is installed obliquely according to a detection state of the detection assembly.

[0024] Optionally, the determining whether the bucket is installed in the inner tub according to the distance between the detection assembly and the bottom of the inner tub, and the determining whether the bucket is installed obliquely according to the detection state of the detection assembly, comprises:

[0025] If the distance between the detection assembly and the bottom of the inner tub is within a first threshold range, it is determined that the bucket is installed in the inner tub.

[0026] If the distance between the detection assembly and the inner drum bottom is within a second threshold range, it is determined that the middle drum is not installed in the inner drum, the second threshold range being greater than the first threshold range.

[0027] Optionally, the detection assembly comprises a transmitter and a receiver, the transmitter being configured to transmit ultrasonic signals towards the inner drum, and the receiver being configured to receive the ultrasonic signals reflected from the inner drum; and the determining whether the middle drum is installed in the inner drum according to the distance between the detection assembly and the inner drum bottom, and the determining whether the middle drum is installed obliquely according to the detection state of the detection assembly further comprises:

[0028] If the receiver does not receive the ultrasonic signals, it is determined that the middle drum is installed obliquely.

[0029] In the washing machine and the detection method thereof provided by the embodiments of the present application, the distance between the detection assembly and the inner drum bottom is detected before the washing program starts, so as to determine whether the middle drum is installed in the inner drum, which can reduce the occurrence of the phenomenon of misoperation of the washing program without the middle drum when the middle drum is installed, and further improve the safety performance of the washing machine; in addition, whether the middle drum is installed obliquely can be determined according to the detection state of the detection assembly, without the need of additional components for detection, and the consumables are saved on the basis of rich functions. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0031] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0032] Figure 1 The first structure schematic diagram of the washing machine provided by the embodiments of the present application.

[0033] Figure 2 The second structure schematic diagram of the washing machine provided by the embodiments of the present application.

[0034] Figure 3 The Figure 2 The structure schematic diagram of the washing machine from another angle.

[0035] Figure 4 The third structure schematic diagram of the washing machine provided by the embodiments of the present application.

[0036] Figure 5 FIG. 2 shows another perspective view of the washing machine. Figure 4 FIG. 3 shows another perspective view of the washing machine.

[0037] Figure 6 FIG. 4 shows a first flowchart of a detection method of the washing machine.

[0038] Figure 7 FIG. 5 shows a second flowchart of a detection method of the washing machine. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] Please refer to Figure 1 , Figure 1 FIG. 1 shows a first structural schematic diagram of a washing machine provided by an embodiment of the present application. The embodiment of the present application provides a washing machine 1, which is a pulsator washing machine. For example, the washing machine 1 includes a cabinet 10, an inner tub 20, and a cover 30. The cabinet 10 and the cover 30 are the packaging structure of the washing machine 1, the cabinet 10 has a containing space 11, and the inner tub 20 is arranged in the containing space 11. The inner tub 20 is used to carry clothes, the bottom of the inner tub 20 has a pulsator disc, and the outer tub is arranged outside the inner tub 20 and in the containing space 11. It can be understood that the outer tub is a container for containing water, and the inner tub 20 has a water leakage hole. During the washing stage, the pulsator disc rotates back and forth to drive the water flow and the clothes to rotate and tumble, and the clothes are cleaned in combination with the detergent. During the dehydration, the pulsator disc and the inner tub 20 perform centrifugal motion to perform centrifugal dehydration on the clothes. The cover 30 is rotatably connected with the cabinet 10 to close or expose the containing space 11.

[0041] It should be noted that the capacity of the pulsator washing machine is usually in the range of 5 kg to 10 kg. If the small-volume clothes such as underwear, silk scarves, and socks are washed with this capacity, the added water amount is too much, which leads to the problem of wasting water resources, and the washing with a large amount of water also consumes more electric energy.

[0042] In order to reduce the waste of water resources, the design of the inner tub and the outer tub gradually appears. When small-volume clothes need to be washed, the inner tub is installed in the inner tub, and the washing is performed in the washing mode of the inner tub and the outer tub to save water resources and electric energy. However, when the user uses the inner tub and the outer tub, sometimes the inner tub and the outer tub are installed, but the washing program without the inner tub and the outer tub is mistakenly selected, which leads to the abnormal use of the inner tub and the outer tub and causes the damage of the washing machine.

[0043] In order to reduce the above-mentioned situation, the structure of the washing machine is improved in the embodiment of the present application, which will be described from two aspects of the structure of the washing machine 1 and the detection method of the washing machine.

[0044] For example, please refer to Figure 1 and refer to Figure 2 , as shown in the figure, Figure 2 The second structure diagram of the washing machine provided by the embodiment of the present application is shown. The washing machine 1 further comprises a bucket-in-bucket 40, a detection assembly 50 and a controller 60. The bucket-in-bucket 40 is detachably installed in the inner bucket 20, and the bucket-in-bucket 40 is coaxially arranged with the inner bucket 20. It can be understood that the coaxial arrangement of the bucket-in-bucket 40 and the inner bucket 20 can be driven by the same motor. When a large amount of clothes needs to be washed, the bucket-in-bucket 40 needs to be detached from the inner bucket 20 and taken out, and the motor drives the inner bucket 20 or the pulsator to rotate. When small volume clothes such as socks and underwear need to be washed, the bucket-in-bucket 40 needs to be installed in the inner bucket 20, and the motor drives the bucket-in-bucket 40 to rotate. The installation of the bucket-in-bucket 40 in the inner bucket 20 can be connected by screws, or other connection methods, which can be firmly connected and detached.

[0045] The detection assembly 50 is used to detect the distance between the inner bucket 20 and the bottom. The controller 60 is the control center of the washing machine 1, and the controller 60 is electrically connected with the detection assembly 50. The controller 60 is used to determine whether the bucket-in-bucket 40 is installed in the inner bucket 20 according to the distance between the detection assembly 50 and the bottom of the inner bucket 20, and to determine whether the bucket-in-bucket 40 is installed obliquely according to the detection state of the detection assembly 50.

[0046] In the washing machine 1 provided by the embodiment of the present application, the distance between the detection assembly 50 and the bottom of the inner bucket 20 is detected before the washing program starts, so as to determine whether the bucket-in-bucket 40 is installed in the inner bucket 20, which can reduce the occurrence of the phenomenon of misoperation of the washing program without the bucket-in-bucket when the bucket-in-bucket 40 is installed, and further improve the safety performance of the washing machine 1. In addition, whether the bucket-in-bucket 40 is installed obliquely can also be determined according to the detection state of the detection assembly 50, without the need for additional components for detection, which not only saves materials on the basis of rich functions.

[0047] For example, please refer to Figure 1 and Figure 2 and refer to Figures 3 to 5 , as shown in the figure, Figure 3 The structure diagram of the washing machine from another angle is shown in Figure 2 , the third structure diagram of the washing machine provided by the embodiment of the present application is shown, Figure 4 The structure diagram of the washing machine from another angle is shown in Figure 5 , the third structure diagram of the washing machine provided by the embodiment of the present application is shown, Figure 4Another perspective view of the washing machine. The detection assembly 50 is arranged on the side of the cover 30 facing the accommodation space 11. It can be understood that, since the cover 30 is rotatably connected to the cabinet 10, the washing machine 1 will only normally execute a program when the cover 30 closes the accommodation space 11, otherwise it will fail and alarm, thus ensuring the accuracy of the detection direction of the detection assembly 50. Moreover, compared with the existing arrangement of the detection assembly on the edge of the small tub, arranging the detection assembly 50 on the cover 30 can reduce the influence on the rotation of the inner tub 20, and the use of a non-contact measurement method can improve the effectiveness and accuracy of detection. It should be noted that, since the middle tub 40 will rotate with the bearing of the motor and the impeller disc in the working state of the washing machine 1, it is impossible to arrange power supply and communication cables, and it is also impossible to install sensors and other live devices, therefore, the non-contact measurement based on ultrasonic ranging is a relatively effective detection method in this application scenario.

[0048] The detection assembly 50 includes a transmitter 51 and a receiver 52. The transmitter 51 is configured to emit an ultrasonic signal toward the inner tub 20, and the receiver 52 is configured to receive the ultrasonic signal reflected from the inner tub 20. The transmitter 51 and the receiver 52 are electrically connected to a controller 60. The controller 60 is configured to determine a target distance based on the time difference between the emission and reception of the ultrasonic signal, and to determine whether the middle tub 40 is installed in the inner tub 20 based on the target distance, and to determine whether the middle tub 40 is installed obliquely based on the reception state of the receiver 52. It can be understood that, in the case that the installation positions of the transmitter 51 and the receiver 52 are normal, when the cover 30 is closed, the ultrasonic signal emitted by the transmitter 51 will be reflected on the end face of the middle tub 40 in the case that the middle tub 40 is installed, or on the impeller disc at the bottom of the inner tub 20 in the case that the middle tub 40 is not installed, and the receiver 52 can receive the reflected ultrasonic signal. If the receiver 52 does not receive the ultrasonic signal, it indicates that the middle tub 40 is installed obliquely, and the oblique side wall reflects the ultrasonic signal to another place, so that the receiver 52 cannot receive the signal. At this time, the washing machine 1 can perform an abnormal alarm to prompt the user that the middle tub 40 is installed obliquely and needs to be adjusted.

[0049] It should be noted that the detection assembly 50 is a non-contact sensor for distance measurement, the transmitter 51 transmits an ultrasonic signal towards the inner tub 20, and starts timing at the same time, the ultrasonic wave propagates in the air, and immediately bounces to the receiver 52 when it hits the end face of the tub-in-tub 40. The target distance is determined by calculating the time difference between transmission and reception. If the tub-in-tub 40 is not installed, the distance detected by the detection assembly 50 is not within the set threshold, and at this time the washing machine 1 corresponds to run the washing program without the tub-in-tub; if the tub-in-tub 40 is installed, the detected distance is within the set threshold, and at this time the washing machine 1 corresponds to run the program of the tub-in-tub 40. The controller 60 determines whether the tub-in-tub 40 is successfully installed according to whether the ultrasonic signal is received and whether the distance detected by the ultrasonic wave is within the threshold.

[0050] The bottom of the inner tub 20 corresponding to the circumference of the tub-in-tub 40 needs to be set in a flat state to reduce the influence on the detection accuracy of the detection assembly 50.

[0051] For example, the transmitter 51 is arranged on the side of the receiver 52 away from the cover 30, and the cross-sectional area of the transmitter 51 is smaller than that of the receiver 52, so that the detection assembly 50 is installed neatly and does not affect the reception of the signal by the receiver 52.

[0052] For example, the washing machine 1 includes two detection assemblies 50, which are symmetrically arranged on the cover 30 along the axis of the inner tub 20. Compared with arranging one detection assembly 50, arranging two symmetric detection assemblies 50 can improve the detection accuracy.

[0053] For example, a wire slot is formed in the cover 30, the controller 60 is arranged in the accommodation space 11, the wires connected between the controller 60 and the detection assembly 50 are arranged in the wire slot and the shaft connecting the cover 30 and the cabinet 10, so as to hide the wire harness, improve the neatness and aesthetics of the wire harness, and not be easily affected by the vibration of the washing machine 1 during operation, thereby improving the safety and service life of the wires. The wires connected between the controller 60 and the detection assembly 50 in the accommodation space 11 are sleeved with a protective sleeve and fixed on the cabinet 10 for protection and to reduce the influence of the vibration of the washing machine 1.

[0054] In order to more clearly illustrate the working principle of the detection assembly of the embodiment of the present application, the detection method of the washing machine will be described below.

[0055] Please refer to Figures 1 to 5 and Figure 6 shown, Figure 6 the first flowchart of the detection method of the washing machine provided by the embodiment of the present application. The embodiment of the present application also provides a detection method of a washing machine, and the structure of the washing machine 1 can refer to Figures 1 to 5And the above description, hereinafter, the detection method of the washing machine comprises:

[0056] 101, obtain the distance between the detection assembly and the bottom of the inner tub.

[0057] The non-contact distance measurement method is relatively effective for detecting whether the middle tub is installed in the inner tub. Since the middle tub rotates with the bearing of the motor and the pulsator in the working state of the washing machine, the power supply and communication cable cannot be arranged, and the sensor and other live devices cannot be installed, therefore, the non-contact measurement based on ultrasonic ranging is a relatively effective detection method in this application scenario.

[0058] According to the characteristic that the ultrasonic wave reflects back when encountering a flat object, the distance between the detection assembly and the inner tub is obtained. Whether the middle tub is installed or not, it will reflect an ultrasonic signal back. According to the time difference between the ultrasonic signal transmission and reception, the target distance between the detection assembly and the inner tub is determined, and whether the middle tub is installed is determined according to the target distance.

[0059] 102, determine whether the middle tub is installed in the inner tub according to the distance between the detection assembly and the bottom of the inner tub, and determine whether the middle tub is installed obliquely according to the detection state of the detection assembly.

[0060] The distance between the detection assembly and the bottom of the inner tub indicates whether the middle tub is installed in the inner tub. Since the distance of the ultrasonic signal of the detection assembly reaching the end face of the middle tub is different from the distance reaching the bottom of the inner tub, the target distance can be used to determine whether the middle tub is installed in the inner tub.

[0061] The detection state of the detection assembly can include that the receiver of the detection assembly receives the ultrasonic signal and that the receiver of the detection assembly does not receive the ultrasonic signal. If the receiver of the detection assembly does not receive the ultrasonic signal, it indicates that the middle tub is installed obliquely, and the oblique surface reflects the ultrasonic signal to another place at an angle, not to the receiver. Therefore, when the ultrasonic signal is not received, it can be determined that the middle tub is installed obliquely, and an alarm can be given to remind the user to adjust.

[0062] The detection method of the washing machine provided by the embodiment of the application can detect the distance between the detection assembly and the bottom of the inner tub before the washing program starts, so as to determine whether the middle tub is installed in the inner tub 20, which can reduce the phenomenon of misoperation of the washing program without the middle tub when the middle tub is installed, and further improve the safety performance of the washing machine. In addition, whether the middle tub is installed obliquely can be determined according to the detection state of the detection assembly, without the need for additional components for detection, which not only saves materials on the basis of rich functions.

[0063] Please refer to Figures 1 to 6 and refer to Figure 7 shown,Figure 7 The second flowchart of the detection method of the washing machine is provided for the embodiments of the present application. The embodiments of the present application further provide a detection method of a washing machine, comprising:

[0064] 201, obtaining the distance between the detection assembly and the bottom of the inner tub.

[0065] The non-contact distance measurement is an effective way for detecting whether the middle tub is installed in the inner tub. Since the middle tub rotates with the bearing of the motor and the pulsator in the working state of the washing machine, the power supply and communication cable cannot be arranged, and the sensor and other live devices cannot be installed. Therefore, the non-contact measurement based on ultrasonic ranging is a relatively effective detection method in this application scenario.

[0066] According to the characteristic that the ultrasonic wave is reflected back when encountering a flat object, the distance between the detection assembly and the inner tub is obtained. Whether the middle tub is installed or not, an ultrasonic signal will be reflected back. According to the time difference between the transmission and reception of the ultrasonic signal, the target distance between the detection assembly and the inner tub is determined, and whether the middle tub is installed is determined according to the target distance.

[0067] 202, determining whether the middle tub is installed in the inner tub according to the distance between the detection assembly and the bottom of the inner tub, and determining whether the middle tub is installed obliquely according to the detection state of the detection assembly.

[0068] The distance between the detection assembly and the bottom of the inner tub indicates whether the middle tub is installed in the inner tub. Since the distance of the ultrasonic signal of the detection assembly to the end face of the middle tub is different from the distance to the bottom of the inner tub, whether the middle tub is installed in the inner tub can be determined according to this distance or target distance.

[0069] The detection state of the detection assembly can include that the receiver of the detection assembly receives the ultrasonic signal and that the receiver of the detection assembly does not receive the ultrasonic signal. If the receiver of the detection assembly does not receive the ultrasonic signal, it indicates that the middle tub is installed obliquely, and the inclined surface reflects the ultrasonic signal to another place at an angle, rather than the receiver. Therefore, when the ultrasonic signal is not received, it can be determined that the middle tub is installed obliquely, and an alarm can be given to remind the user to adjust.

[0070] 203, if the distance between the detection assembly and the bottom of the inner tub is within a first threshold range, it is determined that the middle tub is installed in the inner tub.

[0071] 204, if the distance between the detection assembly and the bottom of the inner tub is within a second threshold range, it is determined that the middle tub is not installed in the inner tub, and the second threshold range is greater than the first threshold range.

[0072] Regarding steps 203 and 204:

[0073] The distance between the detection assembly and the bottom of the inner tub represents whether the middle tub is installed in the inner tub. Since the ultrasonic signal of the detection assembly reaches the end face of the middle tub at a different distance than the bottom of the inner tub, the distance or target distance can be used to determine whether the middle tub is installed in the inner tub.

[0074] If the middle tub is installed in the inner tub, the ultrasonic signal of the detection assembly will be reflected back when it hits the end face of the middle tub, that is, it can be determined that the distance between the detection assembly and the bottom of the inner tub is within the first threshold range, indicating that the middle tub is installed in the inner tub, and the middle tub washing program can be performed.

[0075] If the middle tub is not installed in the inner tub, the ultrasonic signal of the detection assembly will be reflected back when it hits the bottom end face of the inner tub, that is, it can be determined that the distance between the detection assembly and the bottom of the inner tub is within the second threshold range, indicating that the middle tub is not installed in the inner tub, and the inner tub washing program or the installation of the middle tub can be performed. Since the bottom of the inner tub is farther away from the detection assembly than the end face of the middle tub, the second threshold range is greater than the first threshold range, that is, the endpoint values of the second threshold range are greater than the endpoint values of the first threshold range. The second threshold range and the first threshold range can be determined by experiment, and are not specifically limited here.

[0076] 205、If the receiver does not receive the ultrasonic signal, it is determined that the middle tub is installed obliquely.

[0077] The fact that the receiver of the detection assembly does not receive the ultrasonic signal indicates that the middle tub is installed obliquely, and the oblique surface reflects the ultrasonic signal to another place at a reflection angle, rather than the receiver. Therefore, when the ultrasonic signal is not received, it can be determined that the middle tub is installed obliquely, and an alarm can be given to remind the user to adjust.

[0078] The detection method of the washing machine provided in the embodiments can be used to detect the distance between the detection assembly 50 and the bottom of the inner tub 20 before the washing program starts, so as to determine whether the middle tub 40 is installed in the inner tub 20, which can reduce the occurrence of the phenomenon of mistakenly operating the washing program without the middle tub when the middle tub 40 is installed, and further improve the safety performance of the washing machine 1. In addition, whether the middle tub 40 is installed obliquely can also be determined according to the detection state of the detection assembly 50, without the need for additional components to detect, and the function is rich, and the consumables are also saved.

[0079] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0080] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0081] The above describes the washing machine and the detection method thereof provided by the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above description of the present application should not be understood as a limitation.

Claims

1. A washing machine, characterized in that, include: The container has storage space; The cover is rotatably connected to the box body to close or expose the containing space; The inner tub is disposed within the accommodating space; A bucket-within-a-bucket is designed to be detachably installed inside the inner bucket, and the bucket-within-a-bucket is coaxially arranged with the inner bucket. A detection component is disposed on the side of the cover facing the receiving space, and the detection component is used to detect the distance between the cover and the bottom of the inner tub; the detection component includes a transmitter and a receiver, the transmitter is disposed on the side of the receiver away from the cover; the cross-sectional area of ​​the transmitter is smaller than the cross-sectional area of ​​the receiver; the transmitter is used to emit ultrasonic signals toward the inner tub, and the receiver is used to receive the ultrasonic signals reflected from the inner tub; A controller, electrically connected to the detection component, is used to determine whether the inner bucket is installed in the inner bucket based on the distance between the detection component and the bottom of the inner bucket, and to determine whether the inner bucket is installed at an angle based on the detection status of the detection component. The transmitter and receiver are electrically connected to the controller, which is used to determine the target distance based on the transmission and reception time difference of the ultrasonic signal, and to determine whether the inner bucket is installed in the inner bucket based on the target distance, and to determine whether the inner bucket is installed at an angle based on the reception status of the receiver.

2. The washing machine according to claim 1, characterized in that, The washing machine includes two detection components, which are symmetrically arranged on the cover along the axis of the inner tub.

3. The washing machine according to claim 2, characterized in that, The cover has a wire groove; The controller is located within the accommodating space, and the wires connecting the controller and the detection component are threaded through the wire groove and the pivot connecting the cover and the housing.

4. The washing machine according to claim 3, characterized in that, The cable connecting the controller and the detection component, located within the housing space, is fitted with a protective sleeve and fixed to the housing.

5. A method for testing a washing machine as described in any one of claims 1 to 4, characterized in that, include: Obtain the distance between the detection component and the bottom of the inner barrel; The distance between the detection component and the bottom of the inner bucket determines whether the bucket-in-bucket is installed in the inner bucket, and the detection status of the detection component determines whether the bucket-in-bucket is installed at an angle.

6. The detection method according to claim 5, characterized in that, The step of determining whether the inner bucket is installed in the inner bucket based on the distance between the detection component and the bottom of the inner bucket, and determining whether the inner bucket is installed at an angle based on the detection status of the detection component, includes: If the distance between the detection component and the bottom of the inner tub is within a first threshold range, then it is determined that the tub-in-tub is installed inside the inner tub; If the distance between the detection component and the bottom of the inner bucket is within a second threshold range, it is determined that the bucket-in-bucket is not installed in the inner bucket, and the second threshold range is greater than the first threshold range.

7. The detection method according to claim 6, characterized in that, The detection component includes a transmitter and a receiver. The transmitter is used to emit ultrasonic signals toward the inner tub, and the receiver is used to receive ultrasonic signals reflected from the inner tub. The step of determining whether the tub-in-tub is installed in the inner tub based on the distance between the detection component and the bottom of the inner tub, and determining whether the tub-in-tub is installed at an angle based on the detection status of the detection component, further includes: If the receiver does not receive an ultrasonic signal, it is determined that the barrel-in-barrel installation is tilted.

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