Washing equipment and control method thereof

Abstract

The invention discloses washing equipment and a control method thereof.The washing equipment comprises a shell and a barrel arranged in the shell, the barrel comprises a barrel opening and a barrel bottom opposite to the barrel opening, and at least two radar structures close to the barrel opening and the barrel bottom of the barrel respectively and located between the barrel and the shell are included. When the cylinder body twists, the cylinder body rotates with a certain point on the cylinder body as the center, and at the moment, noise and vibration are generated due to the fact that the deviation angle of the central axis of the cylinder body is too large, but the deviation amount of the cylinder body is small, and at the moment, the deviation amount of any point on the cylinder body cannot reflect the deviation condition of the cylinder body. At the same time, the at least two radar structures are arranged to monitor the cylinder, the offset angle of the central axis of the cylinder can be calculated through the offset monitored by the two point positions on the cylinder, then noise and vibration generated when the cylinder drives the washing equipment are judged more accurately, vibration and noise are reduced in time, and the user experience is improved.

Description

Technical Field

[0001] The invention belongs to the field of household appliances, and in particular, relates to a washing device and a control method thereof. Background Art

[0002] Washing equipment refers to equipment used to wash the laundry, mainly washing machines, including pulsator washing machines and drum washing machines.

[0003] The drum of the washing equipment will vibrate to varying degrees when it rotates. To prevent this vibration from being directly transmitted to the housing of the washing equipment, causing the entire washing equipment to vibrate or even move, the drum of the washing equipment is generally installed in the housing by hoisting, and the drum has a certain degree of freedom of movement relative to the housing. The motor, clutch, etc. of the washing equipment are generally directly installed on the drum and can move with the drum.

[0004] When the washing machine is dehydrating, its motor rotates at a high speed. Because the weight of the laundry in the drum cannot be evenly distributed, its center of gravity deviates from its axis, causing the drum to deviate when rotating at high speed. This deviation generally has two forms: swing and twist. Swing means that when the drum rotates, the deviation trajectory of the drum forms a sector shape, and the center of the sector is located at one end of the drum or outside the drum; twist means that when the drum rotates, the deviation trajectory of the drum forms two sectors, and the centers of the two sectors are located on the drum.

[0005] A Chinese patent application with application number CN202111044387.7 discloses a washing machine and a dehydration control method thereof, in which a detector is installed on the drum of the washing device to detect the vibration displacement of the drum.

[0006] This method can only obtain the displacement of a certain point on the drum, and then obtain the magnitude of the swing amplitude when the drum swings. However, if the displacement phenomenon of the drum is twisting, the magnitude of the twisting amplitude cannot be obtained through the data of one point, which leads to the loss of accuracy in judging the vibration and noise of the washing equipment.

[0007] In view of this, the present invention is proposed. Summary of the invention

[0008] The present invention provides a control method for washing equipment and washing equipment, and aims to solve the problem that the noise and vibration magnitude of the existing washing equipment cannot be accurately determined when the drum body is twisted.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0010] A washing device comprises a shell and a cylinder arranged in the shell, wherein the cylinder comprises a cylinder mouth and a cylinder bottom opposite to the cylinder mouth, and comprises at least two radar structures respectively close to the cylinder mouth and the cylinder bottom of the cylinder and located between the cylinder and the shell.

[0011] Further, the two radar structures are arranged on the outer peripheral side wall of the cylinder and / or the inner side wall of the shell;

[0012] Preferably, the two radar structures are arranged on the inner side wall of the shell on the same side of the cylinder;

[0013] Preferably, the two radar structures are arranged on the inner wall of the shell along the central axis direction of the cylinder.

[0014] Furthermore, the radar structure includes a signal end for transmitting and receiving electromagnetic waves, and the signal end is arranged toward the cylinder and is used to transmit electromagnetic waves toward the cylinder in a horizontal direction.

[0015] A control method for a washing device as described above, wherein the offset S is preset 01 , S 02 , obtain the minimum distance L between the drum mouth and the shell of the washing equipment before dehydration 01 , the minimum distance L between the bottom of the cylinder and the shell 02 ,

[0016] When the washing equipment is dehydrating, the minimum distance L1 between the drum mouth and the shell and the minimum distance L2 between the drum bottom and the shell are obtained, and the first offset S1=L is calculated. 01 -L1, second offset S2 = L 02 -L2, compare S1 and S respectively 01 Size, S2 and S 02 The size of S1≥S 01 And S2 ≥ S 02 , then control to reduce the dehydration speed of the washing equipment.

[0017] Further, the maximum distance L3 between the mouth of the cylinder and the shell, and the maximum distance L4 between the bottom of the cylinder and the shell are obtained, and L 01 -L1 and L3-L 01 The larger of them is taken as the first offset S1, and L is compared 02 -L2 vs. L4-L 02 The larger one is taken as the second offset S2.

[0018] Furthermore, the offset angle β1 is preset, if S1<S 01 and / or S2<S 02, then the control obtains the distance L0 between the two radars, substitutes the obtained S1, S2 and L0 into β=arctan[(S1+S2) / L0], compares the obtained β with the preset offset angle β1, and if β≥β1, the control reduces the dehydration speed of the washing equipment.

[0019] Furthermore, the preset offset S 03 , S 04 , and the offset angle β2, where S 03 <S 01 , S 04 <S 02 , β2<β1, if S1<S 01 and / or S2<S 02 , and β<β1, then compare S1 and S 03 , S2 and S 04 , β and β2, if S1≥S 03 And S2 ≥ S 04 And if β≥β2, the dehydration speed of the washing equipment is controlled to be reduced.

[0020] Furthermore, the dehydration speed reduction amounts N1, N2, and N3 are preset, and N1<N2<N3.

[0021] If S 03 ≤S1<S 01 And S 04 ≤S2<S 02 If β2≤β<β1, the dehydration speed of the washing equipment is controlled to be reduced by N1;

[0022] If S1≥S 01 And S2 ≥ S 02 , or β≥β1, the dehydration speed of the washing equipment is controlled to be reduced by N2;

[0023] If S1≥S 01 And S2 ≥ S 02 And β≥β1, the dehydration speed of the washing equipment is controlled to be reduced by N3.

[0024] Further, if the obtained minimum distance L1 between the barrel mouth and the shell is 0 and / or the minimum distance L2 between the barrel bottom and the shell is 0, the dehydration is stopped.

[0025] Furthermore, the first offset S1 and the second offset S2 are compared, and the smaller offset is controlled to be output, so as to prompt the user to transfer the laundry to the side with the smaller offset.

[0026] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0027] 1. Two radar structures are set between the drum and the shell of the washing equipment, which can realize the calculation of the overall displacement of the drum through the displacement of two points while monitoring the displacement of a certain point on the drum. This effectively addresses the problem that when the drum is twisted, the displacement of any single point on the drum cannot effectively reflect the overall displacement of the drum. It can therefore comprehensively and accurately judge the vibration and noise of the washing equipment caused by the displacement of the drum, so as to timely reduce noise and vibration and improve the user experience.

[0028] 2. When the washing device is a drum washing machine, the drum is subjected to gravity in the radial direction, so that its vertical displacement is smaller than its horizontal displacement. At this time, the horizontal displacement can represent the maximum amplitude of its displacement. The signal ends of the two radar structures are arranged toward the drum and electromagnetic waves are emitted to the drum in the horizontal direction, so that the displacement of the drum in the horizontal direction can be specifically monitored.

[0029] This radar structure setting method can effectively monitor the maximum amplitude of the drum displacement, and then judge the maximum noise and vibration of the washing equipment during dehydration, and even reduce noise and vibration.

[0030] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0032] Figure 1 is a top view of the washing device of the present invention;

[0033] Figure 2 is a front view of the washing device of the present invention;

[0034] Figure 3 A washing equipment control method of the present invention;

[0035] Figure 4 is another washing equipment control method of the present invention;

[0036] Figure 5 It is another washing equipment control method of the present invention;

[0037] Figure 6 This is another washing equipment control method of the present invention.

[0038] In the figure: 1, shell; 2, cylinder; 21, outer cylinder; 22, inner cylinder; 3, radar structure; 31, radar structure at the mouth of the cylinder; 32, radar structure at the bottom of the cylinder.

[0039] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0041] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention proposes a Figure 1 and 2 The washing equipment shown and Figures 3 to 6 The washing equipment refers to equipment for washing the laundry, mainly refers to washing machines, including pulsator washing machines and drum washing machines.

[0044] The washing device includes a housing 1 and a barrel 2 disposed in the housing 1 for containing washing water. The barrel 2 is installed in the housing 1 by hoisting, and the barrel 2 can move within a certain range relative to the housing 1. The barrel 2 includes an outer barrel 21 and an inner barrel 22 disposed coaxially with the outer barrel 21 and rotatable inside the outer barrel 21. The inner barrel 22 rotates during dehydration.

[0045] The washing device further comprises a motor for driving the inner tub 22 to rotate, and the motor drives the pulsator to rotate and stop.

[0046] The present invention proposes a Figure 1 and 2 The washing device shown in the figure has a barrel body 2 including a barrel mouth and a barrel bottom opposite to the barrel mouth. The washing device also includes at least two radar structures 3, which are respectively arranged near the barrel mouth and the barrel bottom and are respectively called the barrel mouth end radar structure 31 and the barrel bottom end radar structure 32.

[0047] The radar used in the radar structure 3 is a millimeter wave radar.

[0048] The radar structure 31 at the barrel mouth and the radar structure 32 at the barrel bottom are arranged between the barrel body 2 and the shell 1 .

[0049] In the present invention, two radar structures 3 are arranged between the drum 2 and the shell 1 of the washing equipment to detect the distance between the drum bottom and the drum mouth and the shell 1 during rotation, respectively. The specific offset of the drum 2 during rotation can be obtained through the distance change, and two-point monitoring can effectively avoid detection failure when the drum 2 is twisted, which greatly improves the accuracy of vibration and noise monitoring of the washing equipment.

[0050] As an embodiment of the present invention, when the cylinder 2 rotates, its displacement will be somewhat random, its motion trajectory is not necessarily completely symmetrical, and its displacement amplitude in different radial directions may be different. In this respect, if the two radar structures 3 are randomly distributed in the circumferential direction of the cylinder 2, the distance between the cylinder 2 and the shell measured by them can only represent the displacement of the measurement point, and the amplitude of the twisting of the cylinder 2 cannot be accurately inferred. To solve this problem, the following solution is adopted:

[0051] The radar structure 31 at the barrel mouth and the radar structure 32 at the barrel bottom can be arranged on the outer peripheral side wall of the barrel body 2, or on the inner side wall of the shell 1, or respectively on the outer peripheral side wall of the barrel body 2 and the inner side wall of the shell 1.

[0052] The radar structure 3 includes a signal end for transmitting and receiving electromagnetic waves, and the signal end is oriented toward a direction to be measured.

[0053] When the radar structure 3 is arranged on the outer surface of the cylinder 2, the signal end faces the shell 1 opposite to the radar, and is used to measure the distance between the shell 1 and the radar structure 3;

[0054] When the radar structure 3 is arranged inside the housing 1 , the signal end faces the cylinder 2 opposite to the radar, and is used to measure the distance between the cylinder 2 and the radar structure 3 .

[0055] Preferably, the two radar structures 3 are arranged on the inner wall of the housing 1 on the same side of the cylinder 2;

[0056] Preferably, the two radar structures 3 are arranged on the inner wall of the shell 1 along the central axis direction of the cylinder 2 .

[0057] In this embodiment, two radar structures 3 are set on the same side of the shell 1 and arranged along the central axis direction of the cylinder 2. The distance change between the shell 1 and the cylinder 2 measured by the two radar structures 3 is the distance change of the cylinder 2 in the same radial direction. The overall offset angle of the cylinder 2 can be further obtained based on this, so as to achieve a more accurate judgment on the vibration and noise of the washing equipment.

[0058] As another embodiment of the present invention, when the washing device is a drum washing machine, the central axis of the drum 2 is placed horizontally, and its displacement during rotation is affected by the weight of the drum 2. The displacement in the vertical direction will be much smaller than the displacement in the horizontal direction. Therefore, the selection of different measuring directions will have a greater impact on the measurement results.

[0059] The radar structure 3 is arranged on the inner wall of the housing 1, with the signal end arranged toward the cylinder 2, for emitting electromagnetic waves toward the cylinder 2 in a horizontal direction.

[0060] Furthermore, the radar structure 3 is disposed on the shell 1 in a range that is the inner side of the shell 1 corresponding to the middle 1 / 2 of the cylinder 2 in the radial direction.

[0061] In this embodiment, the two radar structures 3 both monitor the displacement of the cylinder 2 in the horizontal direction, and can obtain the maximum displacement of the cylinder 2 during the rotation process, thereby making an accurate judgment on the maximum noise and vibration generated by it.

[0062] The present invention also proposes a Figures 3 to 6 The control method of the washing device shown in the figure adopts the washing device of the present invention. The drum 2 of the washing device will deviate during dehydration, which will involve the lifting structure for lifting the drum 2. Especially for a drum washing machine, it will also pull the sealing structure of the drum 2, causing noise and vibration. In order to avoid excessive noise and vibration affecting users, as shown in FIG. Figure 3 As shown, the control method is as follows:

[0063] S1: Start;

[0064] S2: preset offset S 01 , S 02 ;

[0065] S3: Obtain the minimum distance L between the drum mouth 2 and the shell 1 of the washing device before dehydration 01 , the minimum distance L between the bottom of the cylinder 2 and the shell 1 02 ;

[0066] S4: Control the dehydration of washing equipment;

[0067] S5: Control to obtain the minimum distance L1 between the mouth of the cylinder 2 and the shell 1, and the minimum distance L2 between the bottom of the cylinder 2 and the shell 1;

[0068] S6: Calculate the first offset S1 = L 01 -L1, second offset S2 = L 02 -L2;

[0069] S7: Comparison between S1 and S 01 Size, S2 and S 02 The size of S1≥S 01 And S2 ≥ S 02 , then execute S8, otherwise execute S5;

[0070] S8: Control and reduce the dehydration speed of the washing equipment;

[0071] S9: End.

[0072] The minimum distance L between the drum mouth 2 and the shell 1 of the washing device before dehydration 01 It can refer to the minimum distance between the shell 1 and the tube opening of the outer drum 21 when the washing device is not rotating. This distance is fixed when the washing device leaves the factory. 01 The data is pre-stored in the washing equipment to obtain the minimum distance L 01 The method is to retrieve this data from the pre-stored data.

[0073] Furthermore, the minimum distance L between the shell 1 and the opening of the outer cylinder 21 is 01 Slight changes may occur during use and maintenance, so the distance between the shell body 1 and the barrel mouth of the outer barrel 21 can be measured by the barrel mouth end radar structure 31 before the inner barrel 22 starts to rotate during each washing.

[0074] The minimum distance L between the drum mouth 2 and the shell 1 of the washing device before dehydration 01 It can also refer to the measurement obtained by the radar structure 31 at the drum mouth end during the drainage stage before dehydration in the washing equipment during a washing process.

[0075] The minimum distance L 01 It refers to the distance between the inner wall of the shell 1 where the barrel mouth radar structure 31 is located and the point on the outer barrel 21 closest to it, rather than the smallest distance between the outer barrel 21 and the inner wall of the shell 1 where the barrel mouth radar structure 31 is located in different motion states or postures.

[0076] The minimum distance L between the bottom of the cylinder 2 and the shell 1 02Refers to the minimum distance between the inner wall of the shell 1 where the radar structure 32 at the bottom of the drum is located and the drum 2 before the washing equipment is dehydrated. This distance is fixed when the washing equipment leaves the factory. 02 The data is pre-stored in the washing equipment to obtain the minimum distance L 02 The method is to retrieve this data from the pre-stored data.

[0077] Furthermore, the minimum distance L 02 The distance between the inner wall surface of the shell 1 where the radar structure 32 at the bottom of the drum is located and the drum body 2 can also be measured by the radar structure 32 at the bottom of the drum each time washing and before the washing equipment is dehydrated.

[0078] Specifically, the cylinder 2 includes an outer cylinder 21 and an inner cylinder 22, and the distances L1, L2, L 01 , L 02 Both refer to the distance between the outer cylinder 21 and the corresponding point on the shell 1.

[0079] Controlling the washing machine to dehydrate in step S4 refers to controlling the inner drum 22 to rotate and start dehydration when the washing enters the dehydration stage.

[0080] The minimum distance L1 and the minimum distance L2 described in step S5 respectively refer to the minimum distance between the inner wall of the shell 1 where the radar structure 31 at the drum end and the radar structure 32 at the drum bottom are located during the displacement process of the outer drum 21 when the inner drum 22 rotates to cause the outer drum 21 to shift during dehydration of the washing equipment.

[0081] Furthermore, the dehydration speed (ie, the speed of the inner drum 22) is set in a gradient, and controlling to reduce the speed of the inner drum 22 means controlling to reduce the speed of the inner drum 22 to the previous gradient speed.

[0082] In the present invention, the washing equipment simultaneously monitors the first offset S1 of the barrel mouth and the second offset S2 of the barrel bottom. The two-point monitoring makes the judgment of the offset amplitude of the barrel 2 more accurate. When it is determined that the offset amplitude of the barrel 2 is too large, causing excessive noise and vibration, the rotation speed of the inner barrel 22 is immediately reduced to reduce noise and vibration.

[0083] As an embodiment of the present invention, when the cylinder 2 is offset, its offset in different radial directions may not be completely symmetrical, so it may not be accurate to measure its offset only from the closest distance to the side close to the radar structure 3. To avoid this situation, Figure 4 As shown, the following control method is adopted:

[0084] Step S6 includes:

[0085] S61: Obtain the maximum distance L3 between the mouth of the cylinder 2 and the shell 1, and the maximum distance L4 between the bottom of the cylinder 2 and the shell 1;

[0086] S62: Comparison L 01 -L1 and L3-L 01 If L 01 -L1≥L3-L 01 , then execute S63, otherwise execute S64;

[0087] S63: Control S1 = L 01 -L1, execute S65;

[0088] S64: Control S1 = L3-L 01 , execute S65;

[0089] S65: Comparison L 02 -L2 vs. L4-L 02 The size of L 02 -L2≥L4-L 02 , then execute S66, otherwise execute S67;

[0090] S66: Control S2 = L 02 -L2, execute S7;

[0091] S67: Control S2 = L4-L 02 , execute S7;

[0092] In this embodiment, the offset of the outer drum 21 when it reaches the offset limit positions on both sides in the detection direction of the radar structure 3 when the drum 2 is offset is obtained, and the larger offset is selected as S1 and S2 for the final judgment, which more accurately reflects the maximum amplitude of the offset of the drum 2 and effectively improves the accuracy of judging the vibration and noise of the washing equipment when the offset of the drum 2 is asymmetric.

[0093] As another embodiment of the present invention, when the washing device is dehydrating, the drum 2 may have two forms of deviation: swinging and twisting. Swinging means that when the drum 2 rotates, the drum 2 deviates from the track to form a sector, and the center of the sector is located at one end of the drum 2 or outside the drum 2; twisting means that when the drum 2 rotates, the drum 2 deviates from the track to form two sectors, and the centers of the two sectors are located on the drum 2.

[0094] When the drum 2 is twisted, the offset between any two points of the drum 2 may not be large, but the drum 2 as a whole has been twisted at a large angle, causing the washing device to generate large vibration and noise. To avoid this situation, Figure 5 As shown, the control method is as follows:

[0095] S1: Start;

[0096] S2: preset offset S 01 , S 02 ;

[0097] S3: Obtain the minimum distance L between the drum mouth 2 and the shell 1 of the washing device before dehydration 01 , the minimum distance L between the bottom of the cylinder 2 and the shell 1 02 ;

[0098] S4: Control the dehydration of washing equipment;

[0099] S5: Control to obtain the minimum distance L1 between the mouth of the cylinder 2 and the shell 1, and the minimum distance L2 between the bottom of the cylinder 2 and the shell 1;

[0100] S6: Calculate the first offset S1 = L 01 -L1, second offset S2 = L 02 -L2;

[0101] S7: Comparison between S1 and S 01 Size, S2 and S 02 The size of S1≥S 01 And S2 ≥ S 02 , then execute S11, otherwise execute S8;

[0102] S8: preset an offset angle β1, and execute S9;

[0103] S9: Control to obtain the distance L0 between the two radar structures 3, and execute S10;

[0104] S10: Substitute the obtained S1, S2 and L0 into β = arctan [(S1 + S2) / L0];

[0105] S11: compare β with a preset first offset angle β1, if β≥β1, execute S12, otherwise execute S5;

[0106] S12: Control and reduce the dehydration speed of the washing equipment;

[0107] S13: End.

[0108] The offset angle refers to the angle (particularly the acute angle formed by the two central axis directions) between the central axis direction of the cylinder 2 and the midline axis direction before dehydration (ie, the cylinder 2 has not offset) when the cylinder 2 is offset.

[0109] β=arctan[(S1+S2) / L0] in step S10 uses an inverse trigonometric function to calculate the actual offset angle of the cylinder 2 through the first offset S1, the second offset S2 and the distance L0 between the two radar structures 3.

[0110] The distance L0 between the two radar structures 3 described in step S9 has been determined when the washing device leaves the factory. The distance L0 between the two radar structures 3 can be pre-stored in the washing device before leaving the factory. The distance L0 between the two radar structures 3 is obtained by retrieving the pre-stored data in the washing device to obtain the distance L0 between the two radar structures 3.

[0111] In this embodiment, the offset angle of the cylinder 2 is calculated by the first offset S1, the second offset S2 and the distance L0 between the two radar structures 3. 01 and / or S2<S 02 When the deflection angle of the drum 2 is greater than the preset deflection angle β1, it means that although the drum 2 has not deflected too much in a certain direction, its own twisting amplitude is too large, which is enough to cause the washing machine to produce large noise and vibration. At this time, reducing the speed of the drum 2 can effectively reduce the noise and vibration of the washing machine and improve the user experience.

[0112] As an implementation method of this embodiment, the offset amount and the offset angle of the drum 2 will produce a superposition effect, so that the washing device is in the state of S1<S 01 and / or S2<S 02 , and the offset angle is also less than the preset offset angle β1, a large vibration and noise will be generated. To avoid this situation, Figure 6 As shown, the following control method is adopted:

[0113] S1: Start;

[0114] S2: preset offset S 01 , S 02 ;

[0115] S3: The minimum distance L between the drum mouth 2 and the shell 1 of the washing equipment before dehydration 01 , the minimum distance L between the bottom of the cylinder 2 and the shell 1 02 ;

[0116] S4: washing equipment dehydration;

[0117] S5: Control to obtain the minimum distance L1 between the mouth of the cylinder 2 and the shell 1, and the minimum distance L2 between the bottom of the cylinder 2 and the shell 1;

[0118] S6: Calculate the first offset S1 = L 01 -L1, second offset S2 = L 02 -L2;

[0119] S7: Comparison between S1 and S 01 Size, S2 and S 02 The size of S1≥S 01 And S2 ≥ S02 , then execute S15, otherwise execute S8;

[0120] S8: preset an offset angle β1, and execute S9;

[0121] S9: Control to obtain the distance L0 between the two radar structures 3, and execute S10;

[0122] S10: Substitute the obtained S1, S2 and L0 into β = arctan [(S1 + S2) / L0];

[0123] S11: compare β with a preset first offset angle β1, if β≥β1, execute S16, otherwise execute S12;

[0124] S12: Preset offset S 03 , S 04 , and the offset angle β2, where S 03 <S 01 , S 04 <S 02 , β2<β1;

[0125] S13: Comparison of S1 and S 03 The size of S1≥S 03 , then execute S14, otherwise execute S5;

[0126] S14: Comparison of S2 and S 04 The size of S2≥S 04 , then execute S15, otherwise execute S5;

[0127] S15: compare β and β2. If β ≥ β2, execute S16, otherwise execute S5.

[0128] S16: Control and reduce the dehydration speed of the washing equipment;

[0129] S17: End.

[0130] In this embodiment, when S1<S 01 and / or S2<S 02 , and the offset angle is also smaller than the preset offset angle β1, set a smaller offset S 03 , S 04 , and the offset angle β2, the acquired data satisfies S1≥S 03 , S2≥S 04 When β≥β2, it means that the superposition of the offset amount and the offset angle will generate excessive vibration and noise. At this time, reducing the rotation speed of the inner drum 22 can effectively reduce vibration and noise and improve the user experience.

[0131] As another implementation of this embodiment, there is a certain time interval between each measurement of the position of the cylinder 2 by the radar structure 3. At this time, the dehydration speed is constantly accelerating, and the speed increases very quickly. Between every two measurements of the cylinder 2 by the radar structure 3, the increase in the displacement of the cylinder 2 is different.

[0132] It is possible that during one interval, the offset of cylinder 2 increases greatly, which has caused greater vibration and noise. If the speed is reduced by the same amount as when the offset of cylinder 2 increases less, the noise may not be effectively eliminated, or it may be eliminated slowly. To avoid this problem, the following control method is used:

[0133] The dehydration speed reduction is preset to N1, N2, N3, and N1<N2<N3;

[0134] If S 03 ≤S1<S 01 And S 04 ≤S2<S 02 and β2≤arctan[(S1+S2) / L0]<β1, the control will reduce the dehydration speed by N1;

[0135] If S1≥S 01 And S2 ≥ S 02 , or arctan[(S1+S2) / L0]≥β1, the control will reduce the dehydration speed by N2;

[0136] If S1≥S 01 And S2 ≥ S 02 And arctan[(S1+S2) / L0]≥β1, the control will reduce the dehydration speed by N3.

[0137] Furthermore, the dehydration speed is set in a gradient, N1 is to reduce the speed by one gradient, N2 is to reduce the speed by two gradients, and N3 is to reduce the speed by three gradients.

[0138] In this embodiment, the reduction in the spin speed is controlled according to the amplitude of the deviation of the drum 2, which can more accurately, quickly and effectively reduce the vibration and noise of the washing equipment, and avoid insufficient or too slow reduction in the spin speed, which causes vibration and noise to last too long.

[0139] As another implementation of this embodiment, when the overall deflection of the drum 2 is too large, it may directly collide with the housing 1. In this case, even if the spin speed is reduced, the collision may continue. To avoid this situation, the following methods are adopted:

[0140] If the minimum distance L1 between the drum mouth and the shell 1 is obtained to be 0 or the minimum distance L2 between the drum bottom and the shell 1 is obtained to be 0, the dehydration is stopped;

[0141] If the minimum distance L1 between the drum mouth and the shell 1 is obtained to be 0 and the minimum distance L2 between the drum bottom and the shell 1 is obtained to be 0, the dehydration is stopped.

[0142] The control to stop dehydration may be to stop driving the inner drum 22 and wait for the inner drum 22 to stop naturally due to inertia, or to apply a braking force to the inner drum 22 after stopping driving the inner drum 22 .

[0143] In this embodiment, when the minimum distance L1 between the drum mouth and the shell 1 is 0 and / or the minimum distance L2 between the drum bottom and the shell 1 is 0, it means that the overall offset of the drum 2 is too large and has collided with the shell 1. At this time, the dehydration is stopped to avoid the drum 2 from colliding with the shell 1 again, and the position of the clothes to be washed in the drum 2 is adjusted in time, and then the dehydration is restarted.

[0144] As another implementation of this embodiment, when the drum 2 collides with the housing 1, it means that the laundry in the drum 2 is seriously unevenly distributed, and the two conditions of effective dehydration and noise reduction and vibration reduction cannot be met by speed reduction alone. At this time, the distribution of the laundry in the drum 2 needs to be adjusted. The specific method is:

[0145] The first offset S1 and the second offset S2 are compared, and the smaller offset is controlled to be output, so as to prompt the user to transfer the laundry to the side with the smaller offset.

[0146] For example, if the first offset S1 is greater than the second offset S2, the user is prompted that the bottom offset is small, and part of the laundry at the drum mouth is moved to the bottom of the drum;

[0147] If the first offset S1 is smaller than the second offset S2, the user is prompted that the offset of the drum opening is small, and part of the laundry at the bottom of the drum is moved toward the drum opening;

[0148] In this embodiment, the washing device can determine the weight distribution of the laundry inside the drum 2 by the offset of the drum mouth and the drum bottom of the drum 2, and give a prompt when the user manually distributes the laundry, so that the laundry can be adjusted more accurately, repeated adjustments can be avoided, and the dehydration efficiency can be improved.

[0149] As another embodiment of the present invention, the washing device may be provided with only one radar structure 3, which is installed on the inner side of the housing 1 opposite to the drum 2, and is used to monitor the displacement of the drum 2 in its own radial direction.

[0150] During the dehydration process, the inner drum 22 continues to increase in speed. When it is detected that the displacement of the drum body 2 is greater than a predetermined value, the inner drum 22 is controlled to decrease in speed.

[0151] When it is detected that the displacement of the drum 2 is greater than the maximum predetermined value, the inner drum 22 is controlled to stop and the laundry is evenly distributed. The even distribution can be automatic even distribution by rotating the drum 2 after the washing device is filled with water, or it can send a prompt message to the user for manual even distribution.

[0152] Furthermore, during the dehydration, the speed of the inner drum 22 increases in a gradient. When the speed of the inner drum 22 increases, if the offset of the drum body 2 is greater than a predetermined value, the speed of the inner drum 22 is controlled to be reduced to the previous speed gradient.

[0153] In this embodiment, the washing device uses a radar structure 3 to detect the drum 2, which can effectively monitor the vibration and noise of the washing device with a relatively simple structure.

[0154] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A washing device, comprising a housing and a barrel disposed in the housing, the barrel comprising a barrel opening and a barrel bottom opposite to the barrel opening, characterized in that: The invention comprises at least two radar structures which are respectively close to the barrel mouth and the barrel bottom of the barrel and are located between the barrel and the shell.

2. A washing device according to claim 1, characterized in that: The two radar structures are arranged on the outer peripheral side wall of the cylinder and / or the inner side wall of the shell; Preferably, the two radar structures are arranged on the inner side wall of the shell on the same side of the cylinder; Preferably, the two radar structures are arranged on the inner wall of the shell along the central axis direction of the cylinder.

3. A washing device according to claim 2, characterized in that: The radar structure comprises a signal end for transmitting and receiving electromagnetic waves, the signal end is arranged toward the cylinder and is used for transmitting electromagnetic waves toward the cylinder in a horizontal direction.

4. A control method for a washing device according to any one of claims 1 to 3, characterized in that: Preset offset S 01 , S 02 , obtain the minimum distance L between the drum mouth and the shell of the washing equipment before dehydration 01 , the minimum distance L between the bottom of the cylinder and the shell 02 , When the washing equipment is dehydrating, the minimum distance L1 between the drum mouth and the shell and the minimum distance L2 between the drum bottom and the shell are obtained, and the first offset S1=L is calculated. 01 -L1, second offset S2 = L 02 -L2, compare S1 and S respectively 01 Size, S2 and S 02 The size of S1≥S 01 And S2 ≥ S 02 , then control to reduce the dehydration speed of the washing equipment.

5. A control method for a washing device according to claim 4, characterized in that: Obtain the maximum distance L3 between the mouth of the cylinder and the shell, and the maximum distance L4 between the bottom of the cylinder and the shell, and compare L 01 -L1 and L3-L 01 The larger of them is taken as the first offset S1, and L is compared 02 -L2 vs. L4-L 02 The larger one is taken as the second offset S2.

6. A control method for a washing device according to claim 4 or 5, characterized in that: Preset offset angle β1, if S1<S 01 and / or S2<S 02 , then the control obtains the distance L0 between the two radars, substitutes the obtained S1, S2 and L0 into β=arctan[(S1+S2) / L0], compares the obtained β with the preset offset angle β1, and if β≥β1, the control reduces the dehydration speed of the washing equipment.

7. A control method for a washing device according to claim 6, characterized in that: Preset offset S 03 , S 04 , and the offset angle β2, where S 03 <S 01 , S 04 <S 02 , β2<β1, if S1<S 01 and / or S2<S 02 , and β<β1, then compare S1 and S 03 , S2 and S 04 , β and β2, if S1 ≥ S 03 And S2 ≥ S 04 And β≥β2, the dehydration speed of the washing equipment is controlled to be reduced.

8. A control method for a washing device according to claim 7, characterized in that: The preset dehydration speed reduction amounts are N1, N2, and N3, and N1<N2<N3. If S 03 ≤S1<S 01 And S 04 ≤S2<S 02 If β2≤β<β1, the dehydration speed of the washing equipment is controlled to be reduced by N1; If S1≥S 01 And S2 ≥ S 02 , or β≥β1, the dehydration speed of the washing equipment is controlled to be reduced by N2; If S1≥S 01 And S2 ≥ S 02 And β≥β1, the dehydration speed of the washing equipment is controlled to be reduced by N3.

9. A control method for a washing device according to claim 4, characterized in that: If the obtained minimum distance L1 between the barrel mouth and the shell is 0 and / or the minimum distance L2 between the barrel bottom and the shell is 0, the dehydration is stopped.

10. A control method for a washing device according to any one of claim 9, characterized in that: The first offset S1 and the second offset S2 are compared, and the smaller offset is controlled to be output, so as to prompt the user to transfer the laundry to the side with the smaller offset.

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