Defoaming device and defoaming method for drum washing machine

Abstract

The present invention relates to the technical field of washing machines, and specifically discloses a defoaming device and a defoaming method for a drum washing machine. The defoaming device for a drum washing machine provided by the present invention includes an air blowing component and a laser emitter. During defoaming, the air blowing component blows the foam to a designated position, and the laser emitter emits a laser toward the concentrated foam to eliminate the foam. The laser emitted by the laser emitter can effectively destroy the surface bonding force between the foam in the inner drum, causing the foam to break into water droplets and flow down. While effectively eliminating the foam, the defoaming device also improves the defoaming efficiency, thereby improving the washing ratio of the washing machine. Compared with the method of using a drainage pump to discharge the foam, the water and power consumption of the washing machine is reduced, thereby achieving the purpose of energy saving and improving user satisfaction. The defoaming method for a drum washing machine provided by the present invention is applied to the above-mentioned defoaming device.

Description

Technical Field

[0001] The present invention relates to the technical field of washing machines, and in particular to a defoaming device and a defoaming method for a drum washing machine. Background Art

[0002] Drum washing machines use lifting ribs inside the drum to lift and tumble clothes, a method that reduces water consumption and improves cleaning efficiency. However, due to their low water intake, excessive detergent usage often leads to excessive friction between clothes, resulting in excessive foam. This accumulation of foam not only affects the friction between clothes and, consequently, their cleanliness, but can also cause inaccurate judgments in the water level detection module, leading to alarm failures. It can also cause foam to overflow from the water inlet onto the floor, leading to user complaints and a poor user experience.

[0003] In the prior art, foam is typically removed using a drain pump. Specifically, increasing the water intake activates the drain pump, drawing the foam into the pump for discharge. However, the presence of foam can affect the water level sensor's readings, leading to delayed drain pump operation and reduced foam removal efficiency. Furthermore, since most foam floats above the drum, it can easily cause the drain pump to drain empty, increasing the washing machine's water and power consumption.

[0004] Therefore, there is an urgent need to provide a defoaming device for a drum washing machine to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a defoaming device for a drum washing machine, which can effectively eliminate foam in the inner drum, improve the cleaning ratio of the washing machine, and reduce the water and power consumption of the washing machine.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A defoaming device for a drum washing machine, comprising:

[0008] An air blowing assembly comprises at least one air blowing port, the air blowing port being arranged toward the inner cylinder, and the air blowing port being capable of blowing the foam in the inner cylinder to the side wall of the inner cylinder;

[0009] A laser transmitter emits laser light to eliminate the foam blown onto the side wall of the inner cylinder.

[0010] Preferably, the air blowing assembly and the laser emitter are both installed between the inner cylinder and the outer cylinder and located at the upper front end of the inner cylinder.

[0011] Preferably, the blowing assembly includes two blowing ports, which are symmetrically arranged relative to the axis of the inner cylinder. The blowing directions of the blowing ports are both toward the middle of the inner cylinder, and the angle between the blowing direction and the axis of the inner cylinder is 24°-36°.

[0012] Preferably, the laser emitter is arranged in the middle of the two air blowing ports, and the horizontal laser emission range of the laser emitter is -90°-90°.

[0013] The present invention also aims to provide a defoaming method for a drum washing machine, which has high foam elimination efficiency, improves the cleaning ratio of the washing machine, and saves energy consumption of the washing machine.

[0014] To achieve this object, the present invention adopts the following technical solutions:

[0015] A defoaming method for a drum washing machine, applied to the defoaming device of the drum washing machine, the defoaming method comprising:

[0016] The air blowing component and the laser emitter are started at the same time. The air blowing component blows the foam in the inner cylinder to the side wall of the inner cylinder, and the laser emitter emits laser to eliminate the foam blown to the side wall of the inner cylinder.

[0017] Preferably, before simultaneously starting the air blowing assembly and the laser emitter, the method further comprises:

[0018] The washing program is executed, and the amount of foam in the inner drum is detected in real time. If the amount of foam is greater than a preset value of the foam amount, the inner drum stops rotating.

[0019] Preferably, after the blowing component blows the foam in the inner cylinder to the side wall of the inner cylinder, and the laser emitter emits laser to eliminate the foam blown to the side wall of the inner cylinder, the method further comprises:

[0020] After the foam is eliminated, the inner drum is started to rotate, the washing program is continued, and the amount of foam in the inner drum is detected in real time.

[0021] Preferably, the real-time detection of the amount of foam in the inner cylinder is specifically as follows:

[0022] The water level in the inner drum is detected by a water level sensor. If the water level is greater than a preset water level value, it is determined that the foam amount is greater than the preset foam amount value.

[0023] Preferably, the blowing assembly blows the foam in the inner cylinder to the side wall of the inner cylinder specifically including:

[0024] One of the blowing ports of the blowing assembly blows air into the inner cylinder for a first preset time and then stops blowing;

[0025] The other blowing port of the blowing assembly blows air into the inner cylinder for a second preset time and then stops blowing;

[0026] The two blowing ports of the blowing assembly blow air into the inner cylinder for a third preset time and then stop blowing;

[0027] Repeat this process N times, where N is a natural number greater than 0.

[0028] Preferably, the laser emitter emitting laser to eliminate the foam blown to the side wall of the inner cylinder specifically includes:

[0029] The laser emitter deflects 90° to the left / right from the axis of the inner cylinder to start emitting laser, then scans 180° to the right / left and then scans to the left / right to the initial position, and repeats this cycle M times, where M is a natural number greater than 0.

[0030] Beneficial effects of the present invention:

[0031] The defoaming device of the drum washing machine provided by the present invention includes an air blowing component and a laser emitter. During defoaming, the air blowing component blows the foam to a designated position, and the laser emitter emits a laser toward the concentrated foam to eliminate the foam. The laser emitted by the laser emitter can effectively destroy the surface bonding force between the foam in the inner drum, causing the foam to break into water droplets and flow down. While effectively eliminating foam, the defoaming device also improves the defoaming efficiency, thereby improving the washing ratio of the washing machine. Compared with the method of using a drainage pump to discharge foam, the water and power consumption of the washing machine is reduced, thereby achieving the purpose of energy saving and improving user satisfaction.

[0032] The defoaming method for a drum washing machine provided by the present invention is applied to the above-mentioned defoaming device. When it is necessary to eliminate foam in the inner drum, the blowing component and the laser emitter are started simultaneously. The blowing component blows the foam to a designated position. The laser emitted by the laser emitter destroys the surface bonding force between the foam in the inner drum, causing the foam to break into water droplets and flow down. The foam can be accurately eliminated with high defoaming efficiency and can be defoamed in all directions. The defoaming effect is good, the cleaning ratio of the washing machine is improved, and the purpose of energy saving is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 1 is a schematic structural diagram of a defoaming device for a drum washing machine provided by an embodiment of the present invention;

[0034] Figure 2 This is a flow chart of the main steps of the defoaming method for a drum washing machine provided by an embodiment of the present invention;

[0035] Figure 3 The figure is a flowchart of the detailed steps of the defoaming method for a drum washing machine provided in an embodiment of the present invention.

[0036] In the picture:

[0037] 100, inner cylinder; 200, outer cylinder;

[0038] 1. Air outlet; 2. Laser emitter. DETAILED DESCRIPTION

[0039] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] Example 1

[0043] In view of the problems in the prior art of using a drainage pump to discharge foam, which has low foam discharge efficiency, low cleaning ratio of the washing machine, and high water and power consumption of the washing machine, this embodiment provides a defoaming device for a drum washing machine to solve the above problems.

[0044] like Figure 1As shown, the defoaming device of the drum washing machine provided in this embodiment includes an air blowing assembly and a laser emitter 2. The air blowing assembly includes at least one air blowing port 1, which is arranged toward the inner drum 100. The air blowing port 1 can blow the foam in the inner drum 100 to the side wall of the inner drum 100, and the laser emitter 2 emits laser to eliminate the foam blown to the side wall of the inner drum 100.

[0045] When defoaming, the defoaming device of the drum washing machine provided in this embodiment blows the foam to a designated position, and the laser emitter 2 emits a laser toward the concentrated foam to eliminate the foam. The laser emitted by the laser emitter 2 can effectively destroy the surface bonding force between the foam in the inner drum 100, causing the foam to break into water droplets and flow down. While effectively eliminating foam, the defoaming device also improves the defoaming efficiency, thereby improving the washing ratio of the washing machine. Compared with the method of using a drainage pump to discharge foam, the water and power consumption of the washing machine is reduced, thereby achieving the purpose of energy saving and improving user satisfaction.

[0046] Specifically, in this embodiment, the air blowing assembly and laser emitter 2 are both installed between the inner and outer drums 100, located at the upper front end of the inner drum 100. The gap between the inner and outer drums 100, 200, provides space for the air blowing assembly and laser emitter 2, eliminating the need for dedicated space inside the drum washing machine for their installation. Furthermore, their installation between the inner and outer drums 100, 200, does not affect the normal rotation of the inner drum 100. Since most foam floats above the inner drum 100, the air blowing assembly and laser emitter 2 are positioned near the upper front end of the inner drum 100 to effectively direct and eliminate foam. Positioning the air blowing assembly and laser emitter 2 at the front end of the inner drum 100 directs foam toward the rear end, facilitating observation of foam elimination. Furthermore, the laser emitter 2 emits light toward the rear end of the inner drum 100, preventing it from irradiating the outside of the drum and preventing harm to the user.

[0047] In other embodiments, the blowing assembly and the laser emitter 2 are both installed between the inner tube 100 and the outer tube 200, and the blowing assembly and the laser emitter 2 are arranged close to the upper part of the side wall of the inner tube 100, and the blowing assembly and the laser emitter 2 are placed on the same side. The blowing assembly blows the foam toward the other side wall of the inner tube 100, and the laser emitter 2 emits laser toward the other side wall of the inner tube 100.

[0048] In this embodiment, the blowing assembly includes two blowing ports 1, which are symmetrically arranged relative to the axis of the inner cylinder 100. The blowing direction of the blowing ports 1 is toward the middle of the inner cylinder 100, and the included angle between the blowing direction and the axis of the inner cylinder 100 is 24°-36°. The two blowing ports 1 are symmetrically arranged relative to the axis of the inner cylinder 100, so that most of the foam in the inner cylinder 100 can be blown onto the side wall of the inner cylinder 100. The blowing direction of the blowing ports 1 is at an angle of 24°-36° with the axis of the inner cylinder 100. The gas blown out of the left blowing port 1 blows the foam on the left side toward the right side of the rear end of the inner cylinder 100, and the gas blown out of the right blowing port 1 blows the foam on the right side toward the left side of the rear end of the inner cylinder 100. When the two blowing ports 1 blow air simultaneously, the foam in the middle can be blown toward the rear end of the inner cylinder 100, thereby improving the blowing efficiency. Setting a reasonable blowing angle can ensure that a large area of ​​foam is blown onto the rear end side wall of the inner cylinder 100, thereby improving the defoaming effect.

[0049] The angle between the blowing direction of the air port 1 and the axis of the inner cylinder 100 can be set according to the inner diameter of the inner cylinder 100 to ensure that a wide range of foam is blown to a specific location. In this embodiment, the angle between the blowing direction of the air port 1 and the axis of the inner cylinder 100 is preferably set to 30°, so that the air port 1 has a certain height, can blow the foam above the inner cylinder 100, and the air blown from the air port 1 covers a wide range of foam.

[0050] In other embodiments, according to the size of the inner tube 100, three, four or more air ports 1 can be provided, and multiple air ports 1 are provided along the circumference of the outer tube 200 to improve the efficiency of blowing foam and thus improve the efficiency of defoaming.

[0051] In this embodiment, the laser emitter 2 is arranged in the middle of the two blowing ports 1, and the horizontal laser emission range of the laser emitter 2 is -90°-90°. When the laser emitter 2 emits laser to eliminate foam, the laser emitting end of the laser emitter 2 scans within the specified range to achieve all-round defoaming and improve the defoaming efficiency. The laser emission range of the laser emitter 2 is set to -90°-90°, which basically achieves all-round scanning defoaming, and the laser emitting end of the laser emitter 2 is facing the rear end of the inner cylinder 100. Within the scanning range of 180°, the laser will not irradiate outside the cylinder, ensuring the safety of the operator.

[0052] Example 2

[0053] like Figure 2 As shown, this embodiment provides a defoaming method for a drum washing machine, which is applied to the defoaming device of the drum washing machine provided in Example 1. The defoaming method mainly includes the following steps:

[0054] The air blowing assembly and the laser emitter 2 are started at the same time. The air blowing assembly blows the foam in the inner tube 100 to the side wall of the inner tube 100. The laser emitter 2 emits laser to eliminate the foam blown to the side wall of the inner tube 100.

[0055] The present embodiment provides a defoaming method for a drum washing machine. When it is necessary to eliminate foam in the inner drum 100, the air blowing component and the laser emitter 2 are simultaneously activated. The air blowing component blows the foam to a designated position. The laser emitted by the laser emitter 2 destroys the surface bonding force between the foam in the inner drum 100, causing the foam to break into water droplets and flow down. The method can accurately eliminate foam, has high defoaming efficiency, can defoam in all directions, has a good defoaming effect, improves the cleaning ratio of the washing machine, and achieves the purpose of energy saving.

[0056] Furthermore, the blowing assembly blows the foam in the inner cylinder 100 to the side wall of the inner cylinder 100 specifically including: one of the blowing ports 1 of the blowing assembly blows into the inner cylinder 100 for a first preset time and then stops blowing, the other blowing port 1 of the blowing assembly blows into the inner cylinder 100 for a second preset time and then stops blowing, both blowing ports 1 of the blowing assembly blow into the inner cylinder 100 for a third preset time and then stop blowing, and this cycle is repeated N times to effectively blow the foam to the designated position, where N is a natural number greater than 0.

[0057] Specifically, the blowing port 1 set on the left side blows the foam on the left side of the inner tube 100 to the right side, and stops blowing after blowing for a certain time. The blowing port 1 set on the right side blows the foam on the right side of the inner tube 100 to the left side, and stops blowing after blowing for a certain time. Then, the two blowing ports 1 blow air into the inner tube 100 at the same time, blowing the foam in the middle toward the rear end of the inner tube 100, and stop blowing after blowing for a certain time. Then, the above steps are repeated N times.

[0058] Preferably, one of the blowing ports 1 of the blowing assembly blows air into the inner cylinder 100 for 6 seconds and then stops blowing, the other blowing port 1 of the blowing assembly blows air into the inner cylinder 100 for 6 seconds and then stops blowing, both blowing ports 1 of the blowing assembly blow air into the inner cylinder 100 for 6 seconds and then stop blowing, and the above steps are repeated three times before stopping blowing.

[0059] In other embodiments, the amount of foam in the inner cylinder 100 can be detected, and the blowing time and / or number of cycles of the two blowing ports 1 can be determined based on the amount of foam. Specifically, the amount of foam can be determined before defoaming, and then the detected amount of foam can be compared with a preset value. Each preset value corresponds to a different blowing time and / or number of cycles. The air outlet time and / or number of cycles can be determined based on the detected amount of foam to ensure that the foam is effectively blown to the designated location.

[0060] In this embodiment, laser emitter 2 emits laser light to eliminate foam blown onto the sidewall of inner drum 100. Specifically, laser emitter 2 begins emitting laser light by deflecting 90° left / right from the axis of inner drum 100. Laser emitter 2 then scans 180° right / left, then back left / right to its initial position, repeating this cycle M times. A scanning cycle consists of laser emitter 2 scanning 180° right / left, then back left / right to its initial position. After executing M scanning cycles, laser emitter 2 stops scanning, thereby completing the defoaming process, where M is a natural number greater than 0. Setting the laser emission scanning range of laser emitter 2 to -90° to 90° essentially achieves full-range scanning defoaming, resulting in highly efficient defoaming.

[0061] Preferably, the laser emitter 2 stops scanning after executing three scanning cycles to determine that the defoaming work is completed, and starts and stops working at the same time as the blowing component.

[0062] In other embodiments, the amount of foam at the rear end side wall of the inner cylinder 100 can be detected in real time, and the laser emitter 2 can be determined to stop scanning based on the amount of foam, and the defoaming can be stopped only when the remaining foam amount in the cylinder reaches the requirement.

[0063] Example 3

[0064] like Figure 3 As shown, this embodiment provides a defoaming method for a drum washing machine, which is applied to the defoaming device of the drum washing machine provided in Example 1. The defoaming method includes the following steps:

[0065] Step 1: Execute the washing program and detect the amount of foam in the inner drum 100 in real time.

[0066] Specifically, the inner drum 100 rotates, the washing machine performs a washing process, and the amount of foam in the inner drum 100 is detected.

[0067] In this step, the real-time detection of the amount of foam in the inner drum 100 is performed by using a water level sensor to monitor the water level. When the water level in the inner drum 100 becomes abnormal, the water level sensor detects changes in the air pressure within the inner drum 100 and uses the signal from the water level sensor to determine the amount of foam. This simple detection method can directly utilize the existing water level sensor in the washing machine, reducing the cost of the washing machine.

[0068] In other embodiments, an image acquisition sensor may be provided in the inner tube 100 to determine the amount of foam in the inner tube 100 based on the image information collected by the image acquisition sensor. This method has high detection accuracy. Other detection methods may also be used, which are not limited here.

[0069] Step 2: If the foam volume is greater than the preset foam volume, the inner drum 100 stops rotating.

[0070] Specifically, if the amount of foam exceeds a preset value, the inner drum 100 stops rotating to prepare for foam removal. This stops the foam from being positioned, facilitating precise foam removal. If the amount of foam falls below the preset value, the washing machine continues the wash cycle. A water level sensor monitors the amount of foam in the drum. If the water level exceeds the preset value, the amount of foam exceeds the preset value.

[0071] Step 3: Start the air blowing assembly and the laser emitter 2 at the same time. The air blowing assembly blows the foam in the inner tube 100 to the side wall of the inner tube 100, and the laser emitter 2 emits laser to eliminate the foam blown to the side wall of the inner tube 100.

[0072] After starting the defoaming program, the blowing component and the laser emitter 2 are started at the same time. The blowing component blows the foam to the designated position. The laser emitted by the laser emitter 2 destroys the surface bonding force between the foams in the inner drum 100, causing the foam to break into water droplets and flow down. The foam can be eliminated accurately with high defoaming efficiency and all-round defoaming. The defoaming effect is good, thereby improving the cleaning ratio of the washing machine and achieving the purpose of energy saving.

[0073] Specifically, the blowing assembly blows the foam in the inner cylinder 100 to the side wall of the inner cylinder 100, specifically including: one of the blowing ports 1 of the blowing assembly blows into the inner cylinder 100 for a first preset time and then stops blowing, the other blowing port 1 of the blowing assembly blows into the inner cylinder 100 for a second preset time and then stops blowing, both of the blowing ports 1 of the blowing assembly blow into the inner cylinder 100 for a third preset time and then stop blowing, and repeats this cycle N times to effectively blow the foam to the designated position, where N is a natural number greater than 0.

[0074] Specifically, the blowing port arranged on the left side blows the foam on the left side of the inner tube 100 to the right side, and stops blowing after blowing for a certain time. The blowing port arranged on the right side blows the foam on the right side of the inner tube 100 to the left side, and stops blowing after blowing for a certain time. Then, the two blowing ports 1 blow air into the inner tube 100 at the same time, blowing the foam in the middle toward the rear end of the inner tube 100, and stops blowing after blowing for a certain time. Then, the above steps are repeated N times.

[0075] Preferably, one of the blowing ports 1 of the blowing assembly blows air into the inner cylinder 100 for 6 seconds and then stops blowing, the other blowing port 1 of the blowing assembly blows air into the inner cylinder 100 for 6 seconds and then stops blowing, both blowing ports 1 of the blowing assembly blow air into the inner cylinder 100 for 6 seconds and then stop blowing, and the above steps are repeated three times before stopping blowing.

[0076] In other embodiments, the amount of foam in the inner cylinder 100 can be detected, and the blowing time and / or number of cycles of the two blowing ports 1 can be determined based on the amount of foam. Specifically, the amount of foam can be determined before defoaming, and then the detected amount of foam can be compared with a preset value. Each preset value corresponds to a different blowing time and / or number of cycles. The air outlet time and / or number of cycles can be determined based on the detected amount of foam to ensure that the foam is effectively blown to the designated location.

[0077] In this embodiment, laser emitter 2 emits laser light to eliminate foam blown onto the sidewall of inner drum 100. Specifically, laser emitter 2 begins emitting laser light by deflecting 90° left / right from the axis of inner drum 100. Laser emitter 2 then scans 180° right / left, then back left / right to its initial position, repeating this cycle M times. A scanning cycle consists of laser emitter 2 scanning 180° right / left, then back left / right to its initial position. After executing M scanning cycles, laser emitter 2 stops scanning, thereby completing the defoaming process, where M is a natural number greater than 0. Setting the laser emission scanning range of laser emitter 2 to -90° to 90° essentially achieves full-range scanning defoaming, resulting in highly efficient defoaming.

[0078] Preferably, the laser emitter 2 stops scanning after executing three scanning cycles to determine that the defoaming work is completed, and starts and stops working at the same time as the blowing component.

[0079] In other embodiments, the amount of foam at the rear end side wall of the inner cylinder 100 can be detected in real time, and the laser emitter 2 can be determined to stop scanning based on the amount of foam, and the defoaming can be stopped only when the remaining foam amount in the cylinder reaches the requirement.

[0080] Step 4: After the foam is eliminated, start the inner drum 100 to rotate, continue the washing process, detect the amount of foam in the inner drum 100 in real time, and then execute step 2.

[0081] Specifically, after the defoaming is completed, the inner drum 100 is started to rotate and the washing program is continued. During the washing process, it is also necessary to detect the amount of foam in the inner drum 100 in real time, and determine whether to defoam again based on the amount of foam to improve the washing efficiency and cleaning ratio of the washing machine.

[0082] In this step, the real-time detection of the foam volume within the inner drum 100 is performed by using a water level sensor to monitor the water level within the inner drum 100. If the water level exceeds a preset value, the foam volume exceeds the preset value. If the water level within the inner drum 100 becomes abnormal, the water level sensor detects changes in the air pressure within the inner drum 100 and determines the foam volume based on the signal detected by the water level sensor. This simple detection method can directly utilize the existing water level sensor in the washing machine, reducing the cost of the washing machine.

[0083] In other embodiments, an image acquisition sensor may be provided within the inner barrel 100 to determine whether the amount of foam within the inner barrel 100 exceeds a preset value based on image information captured by the image acquisition sensor. This method provides high detection accuracy. Other detection methods may also be used, which are not limited here.

[0084] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A defoaming device for a drum washing machine, characterized in that: include: An air blowing assembly comprises at least one air blowing port (1), wherein the air blowing port (1) is arranged toward the inner barrel (100), and air blown through the air blowing port (1) can blow the foam in the inner barrel (100) to the side wall of the inner barrel (100); A laser emitter (2), the laser emitter (2) emitting laser light to eliminate the foam blown onto the side wall of the inner cylinder (100); The air blowing assembly and the laser emitter (2) are both installed between the inner cylinder (100) and the outer cylinder (200) and are located at the upper front end of the inner cylinder (100); The blowing assembly comprises two blowing ports (1), the two blowing ports (1) being symmetrically arranged relative to the axis of the inner cylinder (100), and the blowing directions of the blowing ports (1) are both towards the middle of the inner cylinder (100).

2. The defoaming device of a drum washing machine according to claim 1, characterized in that: The included angle between the blowing direction and the axis of the inner cylinder (100) is 24°-36°.

3. The defoaming device of the drum washing machine according to claim 2, characterized in that: The laser emitter (2) is arranged in the middle of the two blowing ports (1), and the laser horizontal emission range of the laser emitter (2) is -90°-90°.

4. A defoaming method for a drum washing machine, applied to the defoaming device of the drum washing machine according to any one of claims 1 to 3, characterized in that: The defoaming method comprises: The air blowing component and the laser emitter (2) are started simultaneously, the air blowing component blows the foam in the inner cylinder (100) to the side wall of the inner cylinder (100), and the laser emitter (2) emits laser to eliminate the foam blown to the side wall of the inner cylinder (100).

5. The defoaming method for a drum washing machine according to claim 4, characterized in that: Before simultaneously starting the air blowing assembly and the laser emitter (2), the method further includes: The washing program is executed, and the amount of foam in the inner drum (100) is detected in real time. If the amount of foam is greater than a preset value of the amount of foam, the inner drum (100) stops rotating.

6. The defoaming method for a drum washing machine according to claim 4, characterized in that: The blowing component blows the foam in the inner cylinder (100) to the side wall of the inner cylinder (100), and the laser emitter (2) emits laser to eliminate the foam blown to the side wall of the inner cylinder (100), further comprising: After the foam is eliminated, the inner drum (100) is started to rotate, the washing program is continued, and the amount of foam in the inner drum (100) is detected in real time.

7. The defoaming method for a drum washing machine according to claim 5 or 6, characterized in that: The real-time detection of the amount of foam in the inner cylinder (100) is specifically as follows: The water level in the inner cylinder (100) is detected by a water level sensor, and if the water level is greater than a preset water level value, it is determined that the foam amount is greater than the preset foam amount value.

8. The defoaming method for a drum washing machine according to claim 4, characterized in that: The blowing assembly blows the foam in the inner cylinder (100) to the side wall of the inner cylinder (100) and specifically includes: One of the blowing ports (1) of the blowing assembly blows air into the inner cylinder (100) for a first preset time and then stops blowing; The other blowing port (1) of the blowing assembly blows air into the inner cylinder (100) for a second preset time and then stops blowing; The two blowing ports (1) of the blowing assembly blow air into the inner cylinder (100) for a third preset time and then stop blowing; Repeat this process N times, where N is a natural number greater than 0.

9. The defoaming method for a drum washing machine according to claim 4, characterized in that: The laser emitter (2) emits laser light to eliminate the foam blown onto the side wall of the inner cylinder (100) and specifically includes: The laser emitter (2) starts emitting laser light by deflecting 90° to the left / right from the axis of the inner cylinder (100), and then scans 180° to the right / left and then scans to the left / right to the initial position, and repeats this cycle M times, where M is a natural number greater than 0.

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