Roller washing machine and control method thereof
By installing a monitoring device on the outer drum of a drum washing machine and combining it with the foam monitoring values from the clockwise and counterclockwise rotation of the inner drum, the problem of low foam monitoring accuracy is solved, achieving precise foam control and avoiding energy waste and foam overflow.
Patent Information
- Application Number
- CN202411052710.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2026-02-03
AI Technical Summary
Existing drum washing machines have low foam monitoring accuracy during forward and reverse rotation, resulting in inconsistent foam monitoring results and an inability to accurately determine the amount of foam. This leads to problems such as foam overflow or premature defoaming, causing energy waste.
A monitoring device is installed on the upper left or upper right of the outer drum of the drum washing machine to monitor the foam value when the inner drum rotates clockwise and counterclockwise. The control module determines the foam height based on the monitoring values of clockwise and counterclockwise rotation and performs precise defoaming control by combining the monitoring values of different rotation directions.
It improves the accuracy of foam monitoring, avoids energy waste caused by premature defoaming and foam overflow caused by late defoaming, and achieves defoaming control at the right time.
Smart Images
Figure CN121451391A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of clothing processing equipment, specifically, it relates to a drum washing machine capable of defoaming and its control method. Background Technology
[0002] Washing machines produce foam when detergent is added. If the amount of detergent added exceeds the actual need, or if the clothing is made of a material that easily generates detergent bubbles, a large amount of foam often forms in the washing drum, posing a washing risk.
[0003] To prevent foam overflow, many washing machines are equipped with foam monitoring devices. These devices monitor the amount of foam and defoaming is controlled when the amount of foam is too large.
[0004] Existing foam monitoring devices are installed at a fixed position inside the drum to detect the presence of foam at that location; the detection of foam at that position indicates a high amount of foam. However, because the inner drum of a drum washing machine rotates in both directions, the water and foam flow in different directions, resulting in varying foam heights. Consequently, the monitoring device may produce different results depending on whether the drum is rotating. Existing foam monitoring methods for drum washing machines, which do not consider the impact of drum rotation on foam height, suffer from low foam monitoring accuracy.
[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention
[0006] This invention proposes a drum washing machine to solve the technical problem of low foam monitoring accuracy in existing drum washing machines.
[0007] To achieve the above-mentioned invention / design objectives, the present invention adopts the following technical solution: A drum washing machine, comprising: The outer cylinder includes the upper left part of the outer cylinder and the upper right part of the outer cylinder; An inner cylinder is disposed within the outer cylinder; The drum washing machine also includes: A monitoring device is installed on the upper left or upper right part of the outer drum, and the monitoring device is used to monitor the foam value inside the washing machine drum; The control module is used to control the inner cylinder to rotate clockwise or counterclockwise, receive the clockwise monitoring value monitored by the monitoring device when the inner cylinder rotates clockwise, receive the counterclockwise monitoring value monitored by the monitoring device when the inner cylinder rotates counterclockwise, determine whether the defoaming condition is met based on the clockwise and counterclockwise monitoring values, and perform defoaming control when the defoaming condition is met.
[0008] As described above, in the drum washing machine, the defoaming condition is that the clockwise and counterclockwise monitoring values of adjacent different rotation directions are both greater than the full-foam setting threshold and the difference between the two is less than the full-foam setting difference. Alternatively, the defoaming condition is that the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-foam setting difference. Alternatively, the control module is used to perform first defoaming control when a first defoaming condition is met, and to perform second defoaming control when a second defoaming condition is met. The first defoaming condition is that the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference. The second defoaming condition is that both the clockwise and counterclockwise monitoring values of adjacent different rotation directions are greater than the full-bubble setting threshold and the difference between them is less than the full-bubble setting difference.
[0009] As described above, in a drum washing machine, the first defoaming control controls the inner drum to stop rotating and to run in a cycle according to a set rotation-stop ratio. The second defoaming control increases the stop time compared to the first defoaming control, or the second defoaming control increases the static defoaming time compared to the first defoaming control.
[0010] In the drum washing machine described above, the control module is used to determine whether to perform defoaming control after the set washing time has started, and / or the monitoring device is used to start working after the set washing time has started.
[0011] In the drum washing machine described above, the control module is used to perform defoaming control when the defoaming conditions are met multiple times within a specific time period.
[0012] A control method for a drum washing machine based on the above, wherein the control method is as follows: Begin washing; Control the inner cylinder to rotate clockwise or counterclockwise; The system receives clockwise monitoring values from the monitoring device when the inner cylinder rotates clockwise, and counterclockwise monitoring values from the monitoring device when the inner cylinder rotates counterclockwise. Based on the clockwise and counterclockwise monitoring values, it determines whether the defoaming conditions are met and performs defoaming control when the defoaming conditions are met.
[0013] The control method for the drum washing machine described above is as follows: When both the clockwise and counterclockwise monitoring values of adjacent rotation directions are greater than the full bubble setting threshold and the difference between the two is less than the full bubble setting difference, defoaming control is performed. Alternatively, if the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference, defoaming control will be implemented. Alternatively, if the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference, the first defoaming control is performed; if both the clockwise and counterclockwise monitoring values of adjacent different rotation directions are greater than the full-bubble setting threshold and the difference between them is less than the full-bubble setting difference, the second defoaming control is performed.
[0014] As described above, in the control method of the drum washing machine, the first defoaming control is to control the inner drum to stop rotating and to run in a cycle according to a set rotation-stop ratio, and the second defoaming control increases the stop time or increases the static defoaming time compared to the first defoaming control.
[0015] The control method for the drum washing machine described above determines whether to perform defoaming control after the set washing time has started, and / or the monitoring device starts working after the set washing time has started.
[0016] The control method for drum washing machines described above involves defoaming control when the defoaming conditions are met multiple times within a specific time period.
[0017] Compared with the prior art, the advantages and positive effects of the present invention are: The present invention relates to a drum washing machine comprising an outer drum, an inner drum, a monitoring device, and a control module. The monitoring device is located at the upper left or upper right of the outer drum and is used to monitor the foam value inside the washing machine drum. The control module is used to control the inner drum to rotate clockwise or counterclockwise, and receives the clockwise monitoring value monitored by the monitoring device when the inner drum rotates clockwise and the counterclockwise monitoring value monitored by the monitoring device when the inner drum rotates counterclockwise. Based on the clockwise and counterclockwise monitoring values, the module determines whether the defoaming conditions are met and performs defoaming control. This invention relates to a drum washing machine that determines whether defoaming conditions are met based on clockwise and counterclockwise monitoring values collected by a monitoring device when the inner drum rotates clockwise and counterclockwise, respectively. When these conditions are met, defoaming control is initiated. The monitoring device is positioned at the upper left or upper right of the outer drum. It utilizes the different directions of water and foam rotation during clockwise and counterclockwise rotation of the inner drum, resulting in different foam heights, to determine the foam height. By combining the clockwise and counterclockwise monitoring values, the accuracy of foam monitoring is greatly improved, allowing the washing machine to defoam at the appropriate time, avoiding energy waste from premature defoaming or foam overflow from delayed defoaming.
[0018] The control method of the drum washing machine of the present invention is as follows: start washing; control the inner drum to rotate clockwise or counterclockwise; receive the clockwise monitoring value monitored by the monitoring device when the inner drum rotates clockwise and the counterclockwise monitoring value detected by the monitoring device when the inner drum rotates counterclockwise, and determine whether the defoaming conditions are met based on the clockwise and counterclockwise monitoring values and perform defoaming control. The control method of the drum washing machine of the present invention determines whether the defoaming conditions are met based on the clockwise and counterclockwise monitoring values of the monitoring device when the inner drum rotates clockwise and counterclockwise, and performs defoaming control when the defoaming conditions are met. The monitoring device is set in the upper left or upper right part of the outer drum. It uses the different directions of water and foam rotation during clockwise and counterclockwise rotation of the inner drum, resulting in different foam heights, to determine the foam height. Combining the relationship between the clockwise and counterclockwise monitoring values greatly improves the accuracy of foam monitoring, controlling the washing machine to perform defoaming at the appropriate time, avoiding energy waste caused by premature defoaming or foam overflow caused by delayed defoaming.
[0019] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a washing machine according to a specific embodiment of the present invention.
[0022] Figure 2 A schematic diagram showing the positions of the inner cylinder, outer cylinder, and monitoring device in a specific embodiment of the present invention.
[0023] Figure 3 This is a schematic diagram showing the position of the monitoring device on the outer cylinder in a specific embodiment of the present invention.
[0024] Figure 4 This is a schematic diagram of a low-bubble state inside the cylinder in a specific embodiment of the present invention.
[0025] Figure 5 This is a waveform diagram of the low-bubble state inside the cylinder in a specific embodiment of the present invention.
[0026] Figure 6 This is a schematic diagram of the multi-bubble state inside the cylinder in a specific embodiment of the present invention.
[0027] Figure 7 This is a waveform diagram of the multi-bubble state inside the cylinder in a specific embodiment of the present invention.
[0028] Figure 8 This is a schematic diagram of the cylinder being filled with bubbles in a specific embodiment of the present invention.
[0029] Figure 9 This is a waveform diagram of the cylinder filled with bubbles in a specific embodiment of the present invention.
[0030] Figure 10 This is a control flowchart of a specific embodiment of the present invention.
[0031] In the picture, 1. Box body; 2. Outer cylinder; 21. The upper left part of the outer cylinder; 22. The upper right part of the outer cylinder; 3. Inner cylinder; 4. Monitoring devices; 5. Control circuit board. Detailed Implementation
[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0033] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
[0036] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0037] The drum washing machine includes an outer drum, an inner drum, a monitoring device, and a control module. The monitoring device is located on the upper left or upper right side of the outer drum. The control module is used to control the inner drum to rotate clockwise or counterclockwise. It receives the clockwise monitoring value from the monitoring device when the inner drum rotates clockwise and the counterclockwise monitoring value from the monitoring device when the inner drum rotates counterclockwise. Based on the clockwise and counterclockwise monitoring values, it determines whether the defoaming conditions are met and performs defoaming control. The drum washing machine determines whether the defoaming conditions are met based on the clockwise and counterclockwise monitoring values of the monitoring device when the inner drum rotates clockwise and counterclockwise, respectively. If the conditions are met, defoaming control is initiated. The monitoring device is located on the upper left or upper right of the outer drum. It uses the different directions of water and foam rotation during clockwise and counterclockwise rotation of the inner drum, which result in different foam heights, to determine the foam height. Combining the relationship between the clockwise and counterclockwise monitoring values greatly improves the accuracy of foam monitoring, allowing the washing machine to defoam at the appropriate time, avoiding energy waste caused by premature defoaming or foam overflow caused by delayed defoaming.
[0038] exist Figure 1-3 In the example, the drum washing machine includes a cabinet 1, an outer drum 2 and an inner drum 3 disposed in the cabinet 1, a monitoring device 4 and a control circuit board 5.
[0039] The outer cylinder 2 is fixedly installed inside the housing 1.
[0040] The inner drum 3 is located inside the outer drum 2, and a drive mechanism (not shown in the figure) is provided inside the housing 1. The inner drum 3 is driven to rotate by the drive mechanism to clean the clothes.
[0041] The drive mechanism can drive the inner cylinder 3 to rotate clockwise or counterclockwise.
[0042] Generally, during the washing process, the drive mechanism drives the inner drum 3 to rotate alternately clockwise and counterclockwise.
[0043] Clockwise rotation refers to the inner cylinder 3 rotating clockwise around its axis in the direction facing the cylinder opening.
[0044] Counterclockwise rotation refers to the inner cylinder 3 rotating counterclockwise around its axis in the direction facing the cylinder opening.
[0045] The outer cylinder 2 includes an upper left part of the outer cylinder 21, an upper right part of the outer cylinder 22, a lower left part of the outer cylinder and a lower right part of the outer cylinder.
[0046] The transverse and longitudinal planes containing the axis of the outer cylinder 2 can divide the cylinder wall of the outer cylinder 2 into four parts: the upper left part 21, the upper right part 22, the lower left part, and the lower right part.
[0047] Among them, the upper left part 21 of the outer cylinder is located above the transverse plane where the axis of the outer cylinder 2 is located and to the left of the longitudinal plane where the axis of the outer cylinder 2 is located, in the direction facing the cylinder opening.
[0048] In the direction facing the cylinder opening, the part of the cylinder wall located above the transverse plane where the axis of the outer cylinder 2 is located and to the right side of the longitudinal plane where the axis of the outer cylinder 2 is located is the upper right part 22 of the outer cylinder.
[0049] exist Figure 1-3 In the example, the monitoring device 4 is located on the upper right part 22 of the outer cylinder.
[0050] In other embodiments, the monitoring device 4 may also be located on the upper left part 21 of the outer cylinder.
[0051] The monitoring device 4 is located at the upper left 21 or the upper right 22 of the outer cylinder to ensure that the foam can be detected when it is more than half full. Furthermore, the direction of foam lifting is different when the inner cylinder 3 rotates clockwise and counterclockwise, resulting in different monitoring values of the monitoring device 4. The amount of foam is determined by the difference in the monitoring values of the monitoring device 4 during the clockwise and counterclockwise rotation of the inner cylinder 3.
[0052] The monitoring device 4 includes a capacitance monitoring device, which is connected to the control circuit board 5 via wires.
[0053] The capacitance monitoring device is in the shape of a narrow strip, and is not limited to wire foam, copper foil, silver paste touch strip, Pedot touch strip, etc., and is pasted on the upper right part 22 of the outer cylinder 2.
[0054] The narrow, elongated strip-shaped capacitance monitoring device is arranged along the radial direction of the outer cylinder 2.
[0055] The control module is located on the control circuit board 5.
[0056] The control module is used to receive monitoring signals from monitoring device 4.
[0057] The control module is used to control the inner cylinder 3 to rotate clockwise or counterclockwise. It receives the clockwise monitoring value monitored by the monitoring device 4 when the inner cylinder 3 rotates clockwise, and receives the counterclockwise monitoring value monitored by the monitoring device 4 when the inner cylinder 3 rotates counterclockwise. Based on the clockwise and counterclockwise monitoring values, it determines whether the defoaming conditions are met and performs defoaming control when the defoaming conditions are met.
[0058] Because the monitoring device 4 is located at the upper left part 21 or the upper right part 22 of the outer drum, the clockwise and counterclockwise rotation of the inner drum causes the water and foam to rotate, resulting in different monitoring values at the installation location of the monitoring device 4. For example, in this embodiment, when the monitoring device is located at the upper right part 22 of the outer drum, the inner drum 3 rotates counterclockwise, causing the water and foam to rise towards the upper right part 22 of the outer drum, and rotates clockwise, causing the water and foam to rise towards the upper left part 21 of the outer drum. Therefore, the monitoring device 4 is more likely to detect a higher monitoring value when the inner drum 3 rotates counterclockwise than when it rotates clockwise. Thus, the drum washing machine fully considers the situation where the water and foam rotate when the inner drum 3 rotates clockwise and counterclockwise, resulting in different foam heights. By combining the clockwise and counterclockwise monitoring values, the foam monitoring accuracy is greatly improved, so as to control the washing machine to defoam at the appropriate time and avoid energy waste caused by premature defoaming or foam overflow caused by delayed defoaming.
[0059] exist Figure 4 In the example, when the foam state inside the inner drum 3 is a small amount of foam, during the washing process, when the inner drum 3 rotates counterclockwise, only a very small amount of foam or almost no foam will come into contact with the monitoring device 4 on the upper right part 22 of the outer drum. When the inner drum 3 rotates clockwise, even less foam or no foam will come into contact with the monitoring device 4 on the upper right part 22 of the outer drum than when it rotates counterclockwise. Therefore, the monitoring device 4 cannot detect a monitoring value, or the monitoring value is small, and the difference between the clockwise and counterclockwise monitoring values is also very small. That is, the fluctuation of the monitoring value of the monitoring device 4 is also very small throughout the process.
[0060] The monitored values from monitoring device 4 were plotted as curves to obtain... Figure 5 The waveform shown is from Figure 5 It can be seen that the monitored value of monitoring device 4 is small and the fluctuation is also very small.
[0061] Therefore, if the monitoring device 4 cannot detect any monitoring value, or if the monitoring value is small and the fluctuation of the clockwise and counterclockwise monitoring values is also very small, it indicates that there is not much foam and there is no need to carry out defoaming control; normal washing is sufficient.
[0062] exist Figure 6In the example, when the foam state inside the inner drum 3 is multi-foam, during the washing process, when the inner drum 3 rotates counterclockwise, the foam is lifted to the upper right part 22 of the outer drum 2. Therefore, a large amount of foam comes into contact with the monitoring device 4 at the upper right part 22 of the outer drum, increasing the monitoring value of the monitoring device 4. When the inner drum 3 stops rotating, the amount of foam decreases, and the monitoring value of the monitoring device 4 decreases. When the inner drum 3 rotates clockwise, the foam is lifted to the upper left part 21 of the outer drum 2, not contacting the monitoring device 4 at the upper right part 22 of the outer drum, resulting in a smaller monitoring value. Therefore, when the foam state is multi-foam, the difference between the clockwise and counterclockwise monitoring values is large. A multi-foam state is determined by the difference between the clockwise and counterclockwise monitoring values in adjacent rotation directions being greater than the multi-foam set difference. This multi-foam state can be used as a condition for defoaming.
[0063] The monitored values from monitoring device 4 were plotted as curves to obtain... Figure 7 The waveform shown is from Figure 7 It can be seen that initially (before 5000), the foam is in a low-foam state, and the waveform remains almost unchanged. Later, as the foam increases to a high-foam state, the difference between the clockwise and counterclockwise monitoring values becomes large, and the waveform fluctuates violently. By pre-determining the high-foam setting difference, and using the difference between the clockwise and counterclockwise monitoring values in adjacent different rotation directions being greater than the high-foam setting difference as the condition for defoaming, defoaming can be performed when the foam state in the inner cylinder 3 is high-foam, thus preventing foam overflow.
[0064] Therefore, when the difference between the clockwise and counterclockwise monitoring values monitored by monitoring device 4 is greater than the multi-bubble setting difference, it indicates that there is a lot of foam, which is a multi-bubble state, and defoaming control is required. Defoaming should be carried out according to the corresponding defoaming control strategy.
[0065] exist Figure 8 In the example, when the foam state inside the inner drum 3 is full (close to overflowing), during the washing process, when the inner drum 3 rotates counterclockwise, the foam is lifted to the upper right part 22 of the outer drum 2. Therefore, a large amount of foam comes into contact with the monitoring device 4 at the upper right part 22 of the outer drum, increasing the monitoring value of the monitoring device 4. When the inner drum 3 stops rotating, the amount of foam decreases, and the monitoring value of the monitoring device 4 decreases slightly, but it is still relatively large. When the inner drum 3 rotates counterclockwise, the foam is lifted to the upper left part 21 of the outer drum 2 and then brought to contact the monitoring device 4 at the upper right part 22 of the outer drum, where the monitoring device 4 also has a large monitoring value. Therefore, when the foam state is full, both the clockwise and counterclockwise monitoring values are large, and the difference between them is small. Therefore, the condition for determining full foam is that both the clockwise and counterclockwise monitoring values in adjacent rotation directions are greater than the full foam threshold and the difference between them is less than the full foam threshold difference, requiring defoaming.
[0066] The monitored values from monitoring device 4 were plotted as curves to obtain... Figure 9 The waveform shown at the location, from Figure 9 As can be seen, initially in a low-foam state, the waveform remains almost unchanged. Later, as the foam increases to a high-foam state, the difference between the clockwise and counterclockwise monitoring values becomes large, and the waveform fluctuates violently. Upon reaching region A, both the clockwise and counterclockwise monitoring values are relatively large, and the difference between them is small, indicating that region A has entered a full-foam state. A full-foam setting threshold and a full-foam setting difference are pre-determined. A full-foam state is defined when both the clockwise and counterclockwise monitoring values in adjacent rotation directions are greater than the full-foam setting threshold and the difference between them is less than the full-foam setting difference. Defoaming is then required, meaning defoaming is performed when the foam state in the inner cylinder 3 is full to prevent foam overflow.
[0067] In some embodiments, defoaming control is performed when a multi-foam state is reached, which can defoam in advance and avoid overflowing foam.
[0068] The control module is used to perform defoaming control when the defoaming condition is met. The defoaming condition is that the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-foaming set difference.
[0069] In some embodiments, defoaming control is performed only when the foam reaches full volume. A proper defoaming strategy can also prevent foam overflow.
[0070] The control module is used to perform defoaming control when the defoaming conditions are met. The defoaming conditions are that the clockwise and counterclockwise monitoring values of adjacent different rotation directions are both greater than the full bubble setting threshold and the difference between the two is less than the full bubble setting difference.
[0071] In some embodiments, defoaming control is performed separately in the multi-bubble state and the full-bubble state to improve the defoaming effect.
[0072] The control module is used to perform first defoaming control when a first defoaming condition is met, and to perform second defoaming control when a second defoaming condition is met. The first defoaming condition is that the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference. The second defoaming condition is that both the clockwise and counterclockwise monitoring values of adjacent different rotation directions are greater than the full-bubble setting threshold and the difference between them is less than the full-bubble setting difference.
[0073] In some embodiments, during the washing process, the inner drum 3 rotates clockwise for a period of time and then counterclockwise for a period of time, and the clockwise and counterclockwise rotations are repeated in a cycle.
[0074] In some embodiments, during the washing process, the inner drum 3 rotates clockwise for a period of time, then stops for a period of time, and then rotates counterclockwise for a period of time, and the clockwise, stop, and counterclockwise rotation cycles are performed.
[0075] Among them, the defoaming power of the second defoaming control is greater than that of the first defoaming control.
[0076] In some embodiments, the first defoaming control is to control the inner cylinder to stop rotating and to cycle according to a set rotation-stop ratio, and the second defoaming control increases the stop time or increases the static defoaming time compared to the first defoaming control.
[0077] When the stop time of the second defoaming control is increased compared to the first defoaming control, the stop time in the second defoaming control is longer in order to facilitate defoaming.
[0078] The second defoaming control adds a static defoaming time compared to the first defoaming control, meaning that a static defoaming time is added on top of the first defoaming control.
[0079] Of course, in washing machines with spray defoaming function, the spraying effect in the second defoaming control can also be improved compared with the first defoaming control.
[0080] Since no foam or only a small amount of foam is generated for a period of time before the start of washing, it is meaningless to monitor the foam at this time. Therefore, the control module is used to determine whether to perform defoaming control after the set time for the start of washing, and / or the monitoring device is used to start working after the set time for the start of washing.
[0081] To improve the accuracy of foam monitoring and avoid false defoaming, the control module is used to perform defoaming control when the defoaming conditions are met multiple times within a specific time period.
[0082] Based on the above design of the drum washing machine, this embodiment also proposes a control method for the drum washing machine: Begin washing; Control the inner cylinder to rotate clockwise or counterclockwise; It receives clockwise monitoring values when the inner cylinder rotates clockwise and counterclockwise monitoring values when the inner cylinder rotates counterclockwise, determines whether the defoaming conditions are met based on the clockwise and counterclockwise monitoring values, and performs defoaming control accordingly.
[0083] In some embodiments, when the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble set difference, it is determined to be a multi-bubble state, and multi-bubble defoaming control is performed.
[0084] When the foam reaches a multi-foam state, defoaming control should be implemented in advance to prevent foam overflow.
[0085] In some embodiments, when the clockwise and counterclockwise monitoring values of adjacent different rotation directions are both greater than the full-bubble setting threshold and the difference between the two is less than the full-bubble setting difference, it is determined to be a full-bubble state, and full-bubble defoaming control is performed.
[0086] Defoaming control should only be implemented when the foam reaches full volume. A proper defoaming strategy can also prevent overflowing foam.
[0087] In some embodiments, when the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference, it is determined to be a multi-bubble state, and multi-bubble defoaming control is performed. When both the clockwise and counterclockwise monitoring values of adjacent different rotation directions are greater than the full-bubble setting threshold and the difference between them is less than the full-bubble setting difference, it is determined to be a full-bubble state, and full-bubble defoaming control is performed.
[0088] Defoaming control is performed separately in both multi-bubble and full-bubble states to improve the defoaming effect.
[0089] When the foam state inside the inner drum 3 is minimal, during the washing process, when the inner drum 3 rotates counterclockwise, only a very small amount of foam, or almost no foam, will contact the monitoring device 4 on the upper right side 22 of the outer drum. When the inner drum 3 rotates clockwise, even less foam, or no foam, will contact the monitoring device 4 on the upper right side 22 of the outer drum. Therefore, the monitoring device 4 will not detect any value, or the value will be small, and the difference between the clockwise and counterclockwise monitoring values will be very small. In other words, the fluctuation of the monitoring value detected by the monitoring device 4 is also very small throughout the process.
[0090] When the foam state inside the inner drum 3 is multi-foam, during the washing process, when the inner drum 3 rotates counterclockwise, the foam is lifted to the upper right part 22 of the outer drum 2. Therefore, a large amount of foam comes into contact with the monitoring device 4 at the upper right part 22 of the outer drum, increasing the monitoring value of the monitoring device 4. When the inner drum 3 stops rotating, the amount of foam decreases, and the monitoring value of the monitoring device 4 decreases. When the inner drum 3 rotates clockwise, the foam is lifted to the upper left part 21 of the outer drum 2, not contacting the monitoring device 4 at the upper right part 22 of the outer drum, resulting in a lower monitoring value. Therefore, when the foam state is multi-foam, the difference between the clockwise and counterclockwise monitoring values is large. A multi-foam state is determined when the difference between the clockwise and counterclockwise monitoring values in adjacent rotation directions is greater than the multi-foam set difference. This multi-foam state can be used as a condition for defoaming.
[0091] When the foam state inside the inner drum 3 is full (close to overflowing), during the washing process, when the inner drum 3 rotates counterclockwise, the foam is lifted to the upper right part 22 of the outer drum 2. Therefore, a large amount of foam comes into contact with the monitoring device 4 at the upper right part 22 of the outer drum, increasing the monitoring value of the monitoring device 4. When the inner drum 3 stops rotating, the amount of foam decreases, and the monitoring value of the monitoring device 4 decreases slightly, but it is still relatively large. When the inner drum 3 rotates counterclockwise, the foam is lifted to the upper left part 21 of the outer drum 2 and then brought to contact the monitoring device 4 at the upper right part 22 of the outer drum, where the monitoring device 4 also has a large monitoring value. Therefore, when the foam state is full, both the clockwise and counterclockwise monitoring values are large, and the difference between them is small. Thus, the condition for determining full foam is that both the clockwise and counterclockwise monitoring values in adjacent rotation directions are greater than the full foam threshold and the difference between them is less than the full foam threshold difference, requiring defoaming.
[0092] Among them, the defoaming power of the second defoaming control is greater than that of the first defoaming control.
[0093] In some embodiments, the first defoaming control is to control the inner cylinder to stop rotating and to cycle according to a set rotation-stop ratio, and the second defoaming control increases the stop time or increases the static defoaming time compared to the first defoaming control.
[0094] When the stop time of the second defoaming control is increased compared to the first defoaming control, the stop time in the second defoaming control is longer in order to facilitate defoaming.
[0095] The second defoaming control adds a static defoaming time compared to the first defoaming control, meaning that a static defoaming time is added on top of the first defoaming control.
[0096] Of course, in washing machines with spray defoaming function, the spraying effect in the second defoaming control can be improved compared to the first defoaming control. Since no foam or only a small amount of foam is generated for a period of time before the start of washing, it is meaningless to monitor the foam at this time. Therefore, the determination of whether to perform defoaming control is started after the start of the set washing time, and / or the monitoring device starts working after the start of the set washing time.
[0097] To improve the accuracy of foam monitoring and avoid false defoaming, defoaming control is implemented when the defoaming conditions are met repeatedly.
[0098] exist Figure 10 In the example, the control method for a drum washing machine is as follows: S1, Begin.
[0099] S2. Control the inner cylinder to rotate clockwise.
[0100] S3, the monitoring module monitors the clockwise monitoring value.
[0101] S4. Control the inner cylinder to rotate counterclockwise.
[0102] S5, the monitoring module monitors the counterclockwise monitoring value.
[0103] S6. Meet the multi-bubble defoaming condition: The difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble set difference. If so, proceed to step S7; otherwise, proceed to step S8.
[0104] S7. Perform defoaming control. Proceed to step S2.
[0105] S8. The full bubble defoaming condition is met: the clockwise and counterclockwise monitoring values of adjacent different rotation directions are both greater than the full bubble set threshold and the difference between the two is less than the full bubble set difference. If so, proceed to step S9; otherwise, proceed to step S10.
[0106] S9. Perform full-bubble defoaming control. Proceed to step S2.
[0107] S10. Perform normal washing. Proceed to step S2.
[0108] The drum washing machine and its control method involve placing a monitoring device on the upper left or upper right of the outer drum. The device utilizes the different directions of water and foam rotation caused by the clockwise and counterclockwise rotation of the inner drum, resulting in different foam heights, to determine the foam height. By combining the relationship between the clockwise and counterclockwise monitoring values, the foam monitoring accuracy is greatly improved. This allows the washing machine to defoam at the appropriate time, avoiding energy waste caused by premature defoaming or foam overflow caused by delayed defoaming.
[0109] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.
Claims
1. A drum washing machine, comprising: The outer cylinder includes the upper left part of the outer cylinder and the upper right part of the outer cylinder; An inner cylinder is disposed within the outer cylinder; The drum washing machine is characterized in that it further includes: A monitoring device is installed on the upper left or upper right part of the outer drum, and the monitoring device is used to monitor the foam value inside the washing machine drum; The control module is used to control the inner cylinder to rotate clockwise or counterclockwise, receive the clockwise monitoring value monitored by the monitoring device when the inner cylinder rotates clockwise, receive the counterclockwise monitoring value monitored by the monitoring device when the inner cylinder rotates counterclockwise, determine whether the defoaming condition is met based on the clockwise and counterclockwise monitoring values, and perform defoaming control when the defoaming condition is met.
2. The drum washing machine according to claim 1, characterized in that, The defoaming condition is that the clockwise and counterclockwise monitoring values of adjacent different rotation directions are both greater than the full-bubble setting threshold and the difference between the two is less than the full-bubble setting difference. Alternatively, the defoaming condition is that the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-foam setting difference. Alternatively, the control module is used to perform first defoaming control when a first defoaming condition is met, and to perform second defoaming control when a second defoaming condition is met. The first defoaming condition is that the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference. The second defoaming condition is that both the clockwise and counterclockwise monitoring values of adjacent different rotation directions are greater than the full-bubble setting threshold and the difference between them is less than the full-bubble setting difference.
3. The drum washing machine according to claim 2, characterized in that, The first defoaming control is to control the inner cylinder to stop rotating and to cycle according to a set defoaming rotation-stop ratio. The second defoaming control increases the stop time compared to the first defoaming control or increases the static defoaming time compared to the first defoaming control.
4. The drum washing machine according to claim 1, characterized in that, The control module is used to determine whether to perform defoaming control after the set washing time has started, and / or the monitoring device is used to start working after the set washing time has started.
5. The drum washing machine according to any one of claims 1-4, characterized in that, The control module is used to perform defoaming control when the defoaming conditions are met multiple times within a specific time period.
6. A control method for a drum washing machine according to any one of claims 1-5, characterized in that, The control method is as follows: Begin washing; Control the inner cylinder to rotate clockwise or counterclockwise; The system receives clockwise monitoring values when the inner cylinder rotates clockwise and counterclockwise monitoring values when the inner cylinder rotates counterclockwise. Based on the clockwise and counterclockwise monitoring values, it determines whether the defoaming conditions are met and performs defoaming control when the defoaming conditions are met.
7. The control method for a drum washing machine according to claim 6, characterized in that, The control method is as follows: When both the clockwise and counterclockwise monitoring values of adjacent rotation directions are greater than the full bubble setting threshold and the difference between the two is less than the full bubble setting difference, defoaming control is performed. Alternatively, if the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference, defoaming control will be implemented. Alternatively, if the difference between the clockwise and counterclockwise monitoring values of adjacent different rotation directions is greater than the multi-bubble setting difference, the first defoaming control is performed; if both the clockwise and counterclockwise monitoring values of adjacent different rotation directions are greater than the full-bubble setting threshold and the difference between them is less than the full-bubble setting difference, the second defoaming control is performed.
8. The control method for a drum washing machine according to claim 7, characterized in that, The first defoaming control controls the inner cylinder to stop rotating and to run in a cycle according to a set rotation-to-stop ratio. The second defoaming control increases the stop time compared to the first defoaming control, or increases the static defoaming time compared to the first defoaming control.
9. The control method for a drum washing machine according to claim 6, characterized in that, The system determines whether to perform defoaming control after the set washing time has started, and / or the monitoring device starts operating after the set washing time has started.
10. The control method for a drum washing machine according to any one of claims 6-9, characterized in that, Defoaming control is implemented when the defoaming conditions are met multiple times within a specific time period.