CN109355864B - Roller washing machine and control method - Google Patents

Abstract

The invention discloses a drum washing machine and a control method thereof, the drum washing machine comprises a water inlet tank assembly and an outer barrel, the water inlet tank assembly is communicated with a water inlet of the outer barrel, the outer barrel is also provided with a foam detection port, and the foam detection port is provided with a foam detection device for detecting foam in the washing machine. The water inlet of the outer barrel is arranged at the front end of the outer barrel, and the foam detection port is arranged at the rear end of the outer barrel. According to the drum washing machine, the foam detection port and the foam detection device are additionally arranged on the outer drum, so that the foam overflow condition can be known in time, the foam is prevented from overflowing from the overflow port, the damage to electrical components is avoided, the potential safety risk is avoided, the safe operation of the washing machine is facilitated, and the user experience is improved.

Description

Roller washing machine and control method

Technical Field

The invention belongs to the field of washing machines, and particularly relates to a drum washing machine and a control method.

Background

In order to improve the washing effect of clothes, washing powder or detergent needs to be put into the washing machine when the clothes are washed, and the abundant foam can more easily clean the clothes. In a general drum washing machine, a water inlet tank assembly is provided at an upper portion of a washing tub and has a supply port communicating with an outer tub. The detergent box is placed in the water inlet tank assembly, when water enters the washing machine, external water can be brought into the outer barrel through the detergent box and the feeding opening of the water inlet tank assembly, and therefore the outer barrel can be communicated with the outside through the feeding opening, the water inlet tank assembly and the detergent box.

In order to avoid that water overflows upwards to damage important electrical elements such as a circuit board on one side of the water inlet tank assembly when the washing machine is in fault and water is fed all the time, the wall of the side, back to the electrical elements, of the water inlet tank assembly is generally provided with an overflow opening, and water can be guided to enter a specific area to flow out under the condition that water is excessively fed into the cylinder. Therefore, the weirs are a protective structure for protecting important electrical components.

Generally, water in the washing machine cannot overflow to the overflow port, but when too much laundry detergent or washing powder is put in the inner barrel, foam overflows upwards and often flows out of the overflow port, metal parts in the washing machine are easily corroded or flow into a line terminal, safety risks exist, meanwhile, the foam can flow to the ground outside the washing machine, the surrounding environment is influenced, user experience is influenced, and inconvenience and economic losses are brought to users.

The present invention has been made in view of this point.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a drum washing machine and a control method. According to the drum washing machine, the foam detection port and the foam detection device are additionally arranged on the outer drum, so that the foam overflow condition can be known in time, the foam is prevented from overflowing from the overflow port, the damage to electrical components is avoided, the potential safety risk is avoided, the safe operation of the washing machine is facilitated, and the user experience is improved.

In order to solve the technical problems, the invention adopts the technical scheme that:

the invention provides a drum washing machine, which comprises a water inlet tank assembly and an outer drum, wherein the water inlet tank assembly is communicated with a water inlet of the outer drum, the outer drum is also provided with a foam detection port, and a foam detection device for detecting foam in the washing machine is arranged at the foam detection port.

In a further scheme, a water inlet of the outer cylinder is arranged at the front end of the outer cylinder, and a foam detection port is arranged at the rear end of the outer cylinder;

preferably, the foam detection port is arranged at the upper part of the rear end of the outer cylinder;

preferably, the foam detection port is positioned on the outer cylinder at the rear side of the bottom of the inner cylinder.

In a further scheme, the height of the position of the foam detection port is not lower than that of the water inlet of the outer cylinder;

preferably, the height of the position of the foam detection port is higher than that of the water inlet of the outer barrel.

In a further scheme, an overflow port is further arranged on the water inlet tank assembly, and the position of the overflow port is higher than the height of a water inlet of the outer barrel; the position of the foam detection port is not higher than the height of the overflow port;

preferably, the position of the foam detection port is slightly lower than the height of the overflow port of the water inlet tank assembly.

In a further scheme, the edge of the foam detection port protrudes and extends for a certain distance to the outside of the outer cylinder to form a mounting pore channel; the foam detection device is a probe detection device which is fixedly arranged in the mounting pore channel, and the detection end of the probe detection device extends towards the inside of the outer cylinder and is close to the inner wall of the outer cylinder or extends into the inside of the outer cylinder.

In a further aspect, the probe detection device includes a first detection probe and a second detection probe, and the detection end of the first detection probe and/or the second detection probe is located in the foam detection port and is flush with the inner wall of the outer cylinder.

In a further scheme, a protective structure is arranged on the inner wall of the outer cylinder close to the edge of the foam detection port, and the protective structure protrudes inwards relative to the inner wall of the outer cylinder;

preferably, the protective structure comprises a waterproof rib, and the waterproof rib is at least arranged on the front side of the foam detection port;

preferably, the peripheral edges of the foam detection port extend and protrude a certain distance towards the inside of the outer cylinder to form an annular waterproof rib.

The second purpose of the invention is to provide a control method of a drum washing machine, the drum washing machine comprises a water inlet channel component and an outer drum, the water inlet channel component is communicated with a water inlet of the outer drum, the outer drum of the drum washing machine is also provided with a foam detection port, the foam detection port is provided with a foam detection device for detecting foam in the washing machine, if the foam detection device detects foam within a certain detection time, a signal is transmitted to the control device of the washing machine, and the washing machine gives an alarm and/or performs defoaming treatment.

In the further scheme, the foam detection device is a probe detection device, and when the foam of the washing machine is excessive and overflows upwards to the foam detection port in the operation process of the washing machine, the probe detection device generates a signal after contacting the foam and transmits the signal to a control device of the washing machine;

preferably, the control device detects the current and/or conductivity change of the device through the probe to judge whether the foam exists and/or how much the foam exists.

In a further aspect, the detection time is longer than the time for the drum washing machine to execute the surging water flow.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. according to the drum washing machine, the foam detection port and the foam detection device are additionally arranged on the outer drum, so that the foam overflow condition can be known in time, the foam is prevented from overflowing from the overflow port, the damage to electrical components is avoided, the potential safety risk is avoided, the safe operation of the washing machine is facilitated, and the user experience is improved.

2. The foam detection port is positioned at the upper part of the rear end of the outer barrel, and the height of the foam detection port is higher than the water inlet of the outer barrel and lower than the overflow port of the water inlet tank assembly, so that water inlet is not influenced, the foam can be detected to react before overflowing to the overflow port, the foam is prevented from overflowing, and electrical elements and the surrounding environment are protected.

3. The periphery of the foam detection port is also provided with a waterproof protective structure for preventing the foam detection device from generating misjudgment; in addition, when the foam detection device detects, the detection time is also required to be longer than the time for the drum washing machine to execute the surging water flow, so that the accuracy of detection judgment is increased, and the misjudgment is further prevented.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic side view of the outer tub and water inlet tank assembly of the drum-type washing machine according to the present invention;

FIG. 2 is a schematic structural diagram of the outer tub and the water inlet tank assembly of the drum-type washing machine according to the present invention;

FIG. 3 is a schematic cross-sectional view taken along line B-B of the structure of FIG. 2;

FIG. 4 is an enlarged view of a portion a of FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along line B-B of the structure of FIG. 2;

FIG. 6 is an enlarged view of part b of FIG. 5;

FIG. 7 shows a schematic view of the washer of the present invention;

FIG. 8 shows a cross-sectional view taken along line C-C of FIG. 7;

FIG. 9 shows an enlarged view of section D of FIG. 8;

FIG. 10 shows a cross-sectional view taken along line E-E of FIG. 7;

FIG. 11 shows an enlarged view of section F of FIG. 10;

figure 12 shows an exploded view of the installation of the water inlet hose of the present invention.

In the figure: 1, a water inlet groove component, 2, an outer cylinder, 3, an inner cylinder, 4 overflow ports, 5 water outlets, 6 water inlet hoses, 7 water inlets, 8 air holes and 9 air permeable pipes;

100 foam detection ports, 101 foam detection devices, 102 installation pore channels, 103 protection structures, 110 probe detection devices, 111 first detection probes, 112 second detection probes, 113 installation frames and 114 cover bodies;

120 float sensing device, 121 floating ball, 122 reed pipe, 123 non-magnetic conductive pipe, 124 limit platform;

200 of the defoaming structure are adopted,

210 a first defoaming part, 211 a second defoaming part, 212 an installation part, 213 a taking and placing part and 214 a matching part;

220 defoaming portion, 221 mounting ring, 222 first connecting portion, 223 limiting portion, 224 second connecting portion.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Example one

As shown in fig. 1-6, the present embodiment provides a drum washing machine, the drum washing machine includes a water inlet tank assembly 1 and an outer tub 2, the water inlet tank assembly 1 is communicated with a water inlet 7 of the outer tub 2, the outer tub 2 is further provided with a foam detection port 100, and a foam detection device 101 for detecting foam in the washing machine is disposed at the foam detection port 100.

The water inlet tank assembly 1 is generally installed at the upper part of the drum washing machine, the water inlet tank assembly 1 comprises a water inlet box and a detergent box, the detergent box is placed in the water inlet box, and electric elements such as a circuit board and the like are arranged beside the water inlet box. The bottom of one side of the water inlet box is provided with a water outlet 5, and the water outlet 5 is communicated with a water inlet 7 of the outer barrel 2 through a water inlet hose 6. When the washing machine is supplied with water, the external water can be brought into the outer barrel 2 and the inner barrel 3 through the water outlet 5 of the water inlet box, the water inlet hose 6 and the water inlet 7 of the outer barrel 2. When too much laundry detergent or washing powder is put into the inner barrel 3 and the outer barrel 2, foam overflows upwards, overflows into the water inlet tank assembly 1 through the water inlet 7 of the outer barrel 2 and overflows, and electric elements and the surrounding environment are affected.

In the scheme, the foam detection port 100 is additionally arranged on the outer cylinder 2, the foam detection device 101 is arranged in the foam detection port 100, and the foam detection device 101 is electrically connected with the control device of the washing machine and can transmit signals to the control device of the washing machine. So, foam detection device 101 can in time detect the excessive condition of foam, transmits for washing machine's controlling means, and control avoids the foam to overflow, avoids causing the damage to electrical components, avoids potential safety risk, is favorable to washing machine's safe operation, promotes user experience.

In this scheme, the foam detecting device 101 may be any device capable of detecting foam, and may be a probe, a floating ball 121, or other sensors, and may detect foam.

In a further scheme, the water inlet 7 of the outer cylinder 2 is arranged at the front end of the outer cylinder 2, and the foam detection port 100 is arranged at the rear end of the outer cylinder 2.

The "front end" and "rear end" of the present invention are described in terms of the orientation of the existing drum washing machine, the front end refers to the end of the drum washing machine having the laundry input port, and the rear end refers to the bottom side of the outer tub 2 and the inner tub 3.

The water inlet 7 of the outer barrel 2 is arranged at the upper part of the front end of the outer barrel 2, is conveniently communicated with the water outlet 5 of the water inlet box through the water inlet hose 6, and is also convenient for the installation and fixation of the water inlet tank assembly 1. And the foam detection port 100 is arranged at the rear end of the outer barrel 2, so that the installation of the water inlet tank assembly 1 is not influenced, the connection between the water outlet 5 of the water inlet box and the water inlet 7 of the outer barrel 2 is not influenced, and the function of installing the foam detection device 101 and detecting the height of foam in the washing machine can be realized.

Preferably, the foam detecting port 100 is disposed at an upper portion of the rear end of the outer tub 2, such that the foam detecting port 100 has a certain height, and the foam detecting device 101 is not triggered by normal foam, and the foam detecting device 101 is triggered only when the foam overflows to a certain height. The intermittent operation of the foam detecting device 101 is beneficial to saving energy and avoiding resource waste.

Preferably, the foam detecting port 100 is located on the outer cylinder 2 at the rear side of the bottom of the inner cylinder 3.

In the drum washing machine, an inner drum 3 is provided inside an outer drum 2, and the inner drum 3 is provided coaxially with the outer drum 2. The bottom of the inner cylinder 3 and the bottom of the outer cylinder 2 are adjacently arranged and spaced at a certain distance, so that the inner cylinder 3 can rotate conveniently. The foam detection port 100 of the scheme is positioned on the outer barrel 2 at the rear side of the bottom of the inner barrel 3, so that the influence on the rotary motion of the inner barrel 3 can be avoided, and the foam can be more conveniently detected.

In a further scheme, the height of the position of the foam detection port 100 is not lower than the height of the position of the water inlet 7 of the outer cylinder 2.

In this embodiment, the height is the height from the opening to the ground, or the height from the opening to the lowest position of the outer cylinder 2. The height of the position of the foam detection port 100 is higher than the height of the position of the water inlet 7 of the outer barrel 2, or the height of the position of the foam detection port is the same as the height of the position of the water inlet 7 of the outer barrel 2, so that the normal water inlet of the washing machine is ensured, the water is prevented from overflowing from the foam detection port 100, and the water can be prevented from splashing during high-water-level washing. Preferably, the height of the position of the foam detecting port 100 is higher than the height of the water inlet 7 of the outer cylinder 2.

In a further scheme, the water inlet tank assembly 1 is also provided with an overflow port 4, and the position of the overflow port 4 is higher than the height of a water inlet 7 of the outer barrel 2; the position of the foam detection port 100 is not higher than the height of the overflow port 4, so that foam is prevented from overflowing from the overflow port 4.

The overflow port 4 of the water inlet tank assembly 1 is arranged on the side wall of the water inlet box, which is back to the circuit board, when too much water enters the outer barrel 2 and the inner barrel 3, the water can be guided to enter the side with less electric elements, the damage to the important circuit board and the electric elements is reduced as much as possible, and more serious accidents are avoided.

The height of the foam detection port 100 of the embodiment is higher than the water inlet 7 of the outer cylinder 2 and lower than the overflow port 4 of the water inlet tank assembly 1, so that water inlet is not affected, foam can be detected to react before overflowing to the overflow port 4, foam overflow is avoided, and electrical elements and the surrounding environment are protected.

Preferably, the position of the foam detection port 100 is slightly lower than the height of the overflow port 4 of the water inlet tank assembly 1.

In a further aspect, the edge of the foam detecting port 100 protrudes and extends a certain distance to the outside of the outer cylinder 2 to form a mounting hole 102, and the foam detecting device 101 can be mounted in the mounting hole 102.

Further, in this embodiment, the central axis of the foam detecting port 100 may be perpendicular to the central axis of the outer tub 2, or may be parallel to the central axis of the outer tub 2 or may be disposed at a certain angle, as long as the height of the foam detecting port 100 is not lower than the height of the water inlet 7 of the outer tub 2, so as to ensure the normal water inlet of the washing machine, and prevent the water from overflowing from the foam detecting port 100.

The foam detecting port 100 may further include a cover 114 covering the opening thereof, and the cover 114 may be detachably disposed to close an end of the foam detecting port 100 facing the outside of the outer tub 2. A mounting bracket 113 may be further provided on a side of the cover 114 facing the inside of the outer tub 2 for mounting and fixing the foam detecting device 101.

Preferably, the foam detection port 100 is disposed at an upper portion of the rear end of the outer cylinder 2, and the central axis is perpendicular to the central axis of the outer cylinder 2, and a detachable cover 114 covering the opening of the foam detection port 100 is further provided.

In a further scheme, a protective structure 103 is arranged on the inner wall of the outer cylinder 2 close to the edge of the foam detection port 100, and the protective structure 103 protrudes inwards relative to the inner wall of the outer cylinder 2. The protective structure 103 can prevent the foam at the normal water level from receiving vibration and triggering the foam detection device 101, thereby avoiding misjudgment. The protection structure 103 may be a separate member mounted on the inner wall of the outer cylinder 2 near the edge of the foam detection port 100, or may be formed by protruding a certain distance inward from the inner wall of the outer cylinder 2.

Preferably, the protective structure 103 comprises a waterproof rib, and the waterproof rib is at least arranged on the front side of the foam detection port 100. The front side in the scheme is away from the bottom of the outer cylinder 2, and the side close to the front end of the outer cylinder 2 is closer to the bottom of the inner cylinder 3. The rotatory in-process of inner tube 3 produces splash and the foam that splashes easily, sets up waterproof muscle in the front side of foam detection mouth 100, also is the manger plate muscle, can avoid splash and foam to trigger foam detection device 101, avoids producing the misjudgement.

Preferably, the peripheral edge of the foam detecting port 100 extends and protrudes a certain distance to the inside of the outer cylinder 2 to form a ring-shaped waterproof rib. This scheme all sets up waterproof muscle at foam detection mouth 100's all edge all around, and what can be better plays the guard action, the better emergence that prevents the misjudgement.

In addition, the present embodiment further provides a control method for a drum washing machine, specifically:

the drum washing machine comprises a water inlet tank assembly 1 and an outer barrel 2, the water inlet tank assembly 1 is communicated with a water inlet 7 of the outer barrel 2, a foam detection port 100 is further arranged on the outer barrel 2 of the drum washing machine, a foam detection device 101 for detecting foam in the drum washing machine is arranged at the foam detection port 100, if the foam detection device 101 detects foam in a certain detection time, a signal is transmitted to a control device of the drum washing machine, and the drum washing machine gives an alarm and/or performs defoaming treatment.

The drum washing machine is provided with an alarm device and a defoaming device, and the alarm device and the defoaming device are respectively connected with a control device of the washing machine. When the foam detection device 101 detects foam within a certain detection time, a signal is transmitted to the control device of the washing machine, and the control device of the washing machine controls the alarm device to give an alarm to prompt a user or automatically controls the defoaming device to work to defoam.

In a preferred scheme, the detection time is longer than the time for the drum washing machine to execute the sloshing water flow, so that splashing water splash and bubbles generated by the execution of the sloshing water flow by the washing machine are eliminated to trigger the bubble detection device 101, and therefore misjudgment is avoided.

Example two

As shown in fig. 3 and 4, the present embodiment is a further limitation of the first embodiment, in the present embodiment, the foam detecting device 101 is a probe detecting device 110, the edge of the foam detecting port 100 protrudes and extends a certain distance to the outside of the outer cylinder 2 to form a mounting hole 102, the probe detecting device 110 is fixedly disposed in the mounting hole 102, and the detecting end of the probe detecting device extends to the inside of the outer cylinder 2, and approaches the inner wall of the outer cylinder 2 or extends into the inside of the outer cylinder 2, thereby ensuring the accuracy of detecting foam.

In a further aspect, the probe detection device 110 includes a first detection probe 111 and a second detection probe 112, and a detection end of the first detection probe 111 and/or the second detection probe 112 is located in the foam detection port 100 and is flush with an inner wall of the outer cylinder 2.

The mode can not hinder the installation of the inner barrel 3, and can detect the foam at the foam detection port 100 at the first time, so that the signals can be transmitted to the washing machine quickly, the washing machine can react quickly and process the foam, and the foam is prevented from overflowing.

Further, the foam detecting port 100 is disposed at the upper portion of the rear end of the outer cylinder 2, and the central axis is perpendicular to the central axis of the outer cylinder 2, and a detachable cover 114 covering the opening of the foam detecting port 100 is further disposed. The cover body 114 is further provided with a mounting frame 113 on one side facing the inside of the outer cylinder 2, the first detection probe 111 and the second detection probe 112 of the probe detection device 110 are fixed on the mounting frame 113, and the detection end is located in the foam detection port 100, faces the inside of the outer cylinder 2, and is flush with the inner wall of the outer cylinder 2.

In a further scheme, a protective structure 103 is arranged on the inner wall of the outer cylinder 2 close to the edge of the foam detection port 100, and the protective structure 103 protrudes inwards relative to the inner wall of the outer cylinder 2; preferably, the peripheral edge of the foam detection port 100 extends and protrudes a certain distance into the outer tube 2 to form an annular waterproof rib, so that splashed spray and foam are prevented from triggering the foam detection device 101, and misjudgment is avoided.

In addition, the present embodiment further provides a control method for a drum washing machine, specifically:

when the foam of the washing machine is excessive and overflows upwards to the foam detection port 100 in the operation process of the washing machine, the probe detection device 110 generates a signal after contacting the foam and transmits the signal to a control device of the washing machine; the control device judges whether the foam exists and/or the amount of the foam according to the current and/or conductivity change between the first detection probe 111 and the second detection probe 112, and then controls the alarm device to give an alarm to prompt a user or automatically controls the defoaming device to work to defoam.

In a further scheme, the detection time is longer than the time for the drum washing machine to execute the surging water flow, so that splashing water splash and foam generated by the washing machine executing the surging water flow are eliminated, the condition that the foam detection device 101 is triggered by the foam is avoided, and misjudgment is avoided.

EXAMPLE III

As shown in fig. 5 and fig. 6, this embodiment is a further limitation of the first embodiment, in this embodiment, the bubble detecting device 101 is a float sensing device 120, the outer cylinder 2 is provided with a bubble detecting port 100, the float sensing device 120 is arranged at the bubble detecting port 100, and when bubbles in the washing machine overflow to be close to the bubble detecting port 100, the float sensing device 120 generates a signal and transmits the signal to a control device of the washing machine.

Adopt float sensing device 120 to detect the foam in this scheme, when the inside foam of washing machine was excessive when excessive to a certain extent, can drive partial structure among the float sensing device 120 to change float sensing device 120's state. Because the splash and the foam that splash can not change the state of float sensing device 120, the height of the foam can be detected more accurately to a certain extent by float sensing device 120, avoid misjudgment.

In a further scheme, the edge of the foam detection port 100 protrudes and extends to the outside of the outer cylinder 2 for a certain distance to form a mounting hole 102; the float sensing device 120 is fixedly arranged in the mounting hole channel 102, and comprises a non-magnetic conductive pipe 123 with a reed pipe 122 arranged inside and a floating ball 121 sleeved on the non-magnetic conductive pipe 123, wherein when the floating ball 121 is disconnected from the reed pipe 122, the floating ball approaches the inner wall of the outer cylinder 2 or extends into the inner part of the outer cylinder 2.

The upper end of the mounting hole 102 is provided with a limiting platform 124, the limiting platform 124 is formed by partially protruding the inner wall of the mounting hole 102 towards the center thereof, the reed pipe 122 is positioned on the limiting platform 124, and the floating ball 121 is positioned below the limiting platform 124;

preferably, the circumferential inner wall of the mounting hole 102 protrudes towards the center thereof to form an annular limiting platform 124.

When the water level and the foam in the washing machine are normal, the floating ball 121 is located at the lowest end of the non-magnetic pipe 123, and is close to the inner wall of the outer cylinder 2 or extends into the inner part of the outer cylinder 2. At this time, the float 121 is disconnected from the reed pipe 122, and the float sensing device 120 does not send a signal; when the foam in the washing machine overflows to be close to the foam detection port 100, the foam pushes the floating ball 121 to rise until the floating ball 121 and the reed switch 122 are close to a certain distance range or are attached, a signal is generated and transmitted to a control device of the washing machine, and the control device receives a signal that the water level or the foam is abnormal, and then the next reaction is made.

In addition, the present embodiment further provides a control method of a drum washing machine, specifically:

when the foam overflows to a position close to the foam detection port 100 in the washing machine, the floater sensing device 120 generates a signal and transmits the signal to a control device of the washing machine within a certain detection time, and the washing machine gives an alarm and/or performs defoaming treatment.

In a further scheme, when the foam of the washing machine is excessive and overflows upwards to be close to the foam detection port 100 in the operation process of the washing machine, the floating ball of the float sensing device 120 rises along with the foam, is attracted with the reed pipe 122 within a certain detection time to generate a signal, and transmits the signal to a control device of the washing machine. The control device controls the alarm device to give an alarm to prompt a user or automatically controls the defoaming device to work to defoam.

In a further aspect, the detection time is longer than the time for the drum washing machine to execute the surging water flow. Therefore, the condition that splashed water splash and foam generated by the washing machine executing the surging water flow trigger the foam detection device 101 is eliminated, and the misjudgment is avoided.

Example four

As shown in fig. 7-9, this embodiment is a further limitation of the first embodiment, and this embodiment discloses a washing machine, which includes an outer tub 2, the outer tub 2 is provided with an air vent 8 for realizing air circulation between the inside and the outside of the outer tub 2, and the air vent 8 is provided with a defoaming structure for breaking foam overflowing from the outer tub 2 into liquid and guiding the liquid back to the outer tub 2.

In the above scheme, the conventional washing machine, especially the drum washing machine, is generally provided with an air vent 8 communicated with the atmosphere on the outer drum 2, and is further provided with a vent pipe 9, one end of the vent pipe 9 is communicated with the air vent 8, and the other end is communicated with the outer side of the outer drum 2, and under a general condition, the other end of the vent pipe 9 is communicated with the water inlet tank assembly 1. The air pressure inside and outside the drum of the washing machine is balanced through the vent pipe 9, the sensing efficiency of the water level sensor is improved, the water inlet time can be shortened, meanwhile, the air pressure generated during high-speed dehydration of the drum washing machine is released, and the running stability of the machine is kept. However, in the process of washing clothes by the washing machine, if a user uses excessive high-foam detergent or adds excessive detergent, a large amount of foam is generated in the drum, the excessive foam enters the water inlet tank assembly 1 along the air holes 8 through the vent pipes 9 or directly overflows out of the washing machine, or the foam flows out of the machine from the machine in the process of spin-drying the machine, so that the use of the user is influenced, and great inconvenience and economic loss are brought to the user. Furthermore, in some prior art, a filtering structure is arranged in the vent pipe 9, so that ventilation between the outer cylinder 2 and the outside is realized, and foam is prevented from overflowing through the vent pipe 9. But the setting has increased the manufacturing cost of permeability cell 9 in permeability cell 9, and can't take out the maintenance when taking place to block up, has caused very big inconvenience for the user. In this embodiment, the defoaming structure is arranged at the air holes 8, foams overflowing from the outer barrel 2 are broken into liquid and guided back to the outer barrel 2, the installation and the maintenance are convenient, and the defoaming structure is convenient to take out and clean when being blocked by flocks and the like.

Furthermore, one end of the air vent 8 is connected to the inside of the outer cylinder 2, the other end of the air vent extends upwards to the outside of the outer cylinder 2 to be connected with a vent pipe 9 of the washing machine, the defoaming structure is arranged in the other end of the vent pipe 9,

preferably, the ventilation holes 8 vertically extend upwards to the outside of the outer barrel 2.

In the above scheme, the air hole 8 is generally arranged above the washing machine, so that the overflowing foam is directly guided back to the outer cylinder 2 after being crushed into liquid. Inside 8 one end of bleeder vent is connected to urceolus 2, the other end upwards extends to 2 outsides of urceolus, prevents 8 overflows of bleeder vent, defoaming structure sets up in extending to 2 outside other ends of urceolus, and generally speaking, this other end can connect permeability cell 9, the connection and the dismantlement of permeability cell 9 are fairly simple, and defoaming structure sets up in this other end, conveniently takes out when defoaming structure blocks up or takes place other problems and clears up and maintain.

Further, the defoaming structure includes a first defoaming portion 210, the first defoaming portion 210 includes a first body blocking and squeezing foam, the first body is provided with a through hole for ventilation,

preferably, a plurality of through holes are distributed on the first body to form a first reticular body,

more preferably, the first mesh-shaped body is honeycomb-shaped,

preferably, the through holes are the same in shape and size and are uniformly distributed.

In the above-mentioned scheme, first body blocks the foam and plays the effect of extrusion foam when the foam is many, and the foam breaks into liquid under the extrusion, still be equipped with ventilative through-hole on the first body, so first defoaming portion 210 both can realize breaking into liquid with the foam, can guarantee pressure and external intercommunication in the urceolus 2 again. In a preferred embodiment, a plurality of through holes, that is, a plurality of through holes, are distributed on the first body to form a first net-shaped body, which can not only break the foam into liquid, but also ensure that the pressure inside the outer cylinder 2 is communicated with the outside. The first net-shaped body is a common structure like a filter screen, and is simple and convenient to produce and low in cost. Especially, the first net-shaped body is honeycomb-shaped, and the net holes are small and dense, so that the defoaming effect is good, and the communication between the pressure in the outer barrel 2 and the outside can be ensured.

Further, the defoaming structure further comprises a second defoaming portion 211, the second defoaming portion 211 comprises a second body for blocking and squeezing foam, the second body is provided with a ventilation through hole,

preferably, a plurality of through holes are distributed on the second body to form a second reticular body,

more preferably, the second mesh-like body is honeycomb-shaped,

preferably, the through holes are the same in shape and size and are uniformly distributed.

In the above-mentioned scheme, the second body blocks the foam and plays the effect of extrusion foam when the foam is many, and the foam breaks into liquid under the extrusion, still be equipped with ventilative through-hole on the second body, so first defoaming portion 210 both can realize breaking into liquid with the foam, can guarantee pressure and external intercommunication in the urceolus 2 again. In a preferred embodiment, the second body is provided with a plurality of through holes, that is, a plurality of through holes, to form a second net-shaped body, which can not only break the foam into liquid, but also ensure the pressure inside the outer cylinder 2 to be communicated with the outside. The second net-shaped body is a common structure like a filter screen, and has the advantages of simple and convenient production and low cost. Especially, the second reticular body is cellular, and the small and dense meshes have good defoaming effect, and can ensure that the pressure in the outer barrel 2 is communicated with the outside. In addition, set up first body and second body, carry out twice defoaming processing to the foam, carry out further processing with the foam that first body was not broken out completely, the defoaming effect is better.

Further, the defoaming structure further comprises a mounting part 212 for mounting the defoaming structure in the air vent 8, the mounting part 212 is respectively connected with the first defoaming part 210 and the second defoaming part 211, a containing cavity is formed between the first defoaming part 210 and the second defoaming part 211,

preferably, the installation part 212 is of a circular ring structure, the outer wall of the installation part 212 is matched with the inner wall of the air hole 8, and the first defoaming part 210 and the second defoaming part 211 are both connected to the inner wall of the installation part 212.

In the above solution, the mounting portion 212 connects the first defoaming portion 210 and the second defoaming portion 211 together, and also mounts the defoaming structure in the air hole 8. When the convenience was maintained in needs, take out first defoaming portion 210 and second defoaming portion 211 together and maintain and clear up, conveniently install first defoaming portion 210 and second defoaming portion 211 together again, omit installation and dismantlement step. Form between first defoaming portion 210 and the second defoaming portion 211 and hold the chamber, hold and extrude foam, foam behind first defoaming portion 210 because the pressurized, the volume can increase rapidly when suddenly getting into to hold the chamber, but because the volume that holds the chamber is little, the foam of volume rapid increase receives the extrusion of bigger pressure again rapidly, and then thoroughly destroys. In a preferred embodiment, the mounting portion 212 has a circular ring structure, and the outer wall of the circular ring structure is matched with the inner wall of the air hole 8, so that the circular ring outer wall is more easily matched with the inner wall of the air hole 8 without a gap through which foam can pass. First defoaming portion 210 and second defoaming portion 211 all connect the inner wall at installation department 212, more easily with the cooperation of 8 inner walls of bleeder vent, avoid appearing protruding fish tail inner walls, also connect more easily.

Furthermore, the second defoaming portion 211 is integrally formed with the mounting portion 212, the first defoaming portion 210 is detachably connected with the mounting portion 212,

preferably, the first defoaming portion 210 is clamped with the mounting portion 212, so that the structure is simple, the mounting is convenient,

preferably, a thread is arranged in the mounting portion 212, and the first defoaming portion 210 is in threaded connection with the mounting portion 212, so that the structure is simple and the mounting is convenient.

In the above scheme, second defoaming portion 211 and installation department 212 integrated into one piece simplify the structure, need not the assembly, first defoaming portion 210 can be dismantled with installation department 212 and be connected, and the chamber that holds that forms between convenient first defoaming portion 210 and the second defoaming portion 211 clears up and maintains.

Further, the first body is arranged at a position close to the outer cylinder 2 and is convexly arranged towards the outer cylinder 2, the second body is arranged at a position far away from the outer cylinder 2 and is convexly arranged opposite to the first body,

preferably, the first body and the second body are both hemispherical.

In the above-mentioned scheme, first body sets up towards 2 direction bulges of urceolus, conveniently blocks the foam, receives the foam part breakage that blocks, and the part is crowded to the bulge next door, because there is the existence of bulge to lead to the bulge next door narrow, and a large amount of foams extrusion is here, is broken by the extrusion more easily, and defoaming effect is better. Second body and the reverse setting of first body hold the chamber in order to maximize, so can accept more foams on the one hand and extrude and destroy, and on the other hand great chamber that holds makes the foam that has just received the extrusion not receive behind the extrusion great space suddenly entering bigger space bigger, eliminate these foams more easily. In a preferred embodiment, the first body is hemispherical, so that the distance between the first body and the inner wall of the vent hole 8 is smaller and smaller, the foam is accumulated more and more, the pressure applied to the first body is larger and larger, and the foam is easier to break. The second body is hemispherical for get into the space of the foam that holds the cavity volume suddenly grow and be more and more big earlier, and then be more and more littleer, the defoaming effect is better.

Further, the aperture of the through holes of the first body is smaller than that of the through holes of the second body, and the number of the through holes of the first body is larger than that of the through holes of the second body.

In the above-mentioned scheme, the foam can increase suddenly after first body, still can destroy before the second body, and on the other hand, the through-hole size of second body is big for better ventilative, also is the atmospheric pressure before in order to enable the atmospheric pressure that holds the intracavity to be greater than first body to realize the foam and increase the purpose of volume suddenly. The number of the through holes of the first body is larger than that of the through holes of the second body, and because the foam reaching the second body is obviously less than that of the first body, the foam can be released by arranging too many through holes. In addition, the aperture of the through-hole of first body is less than the aperture of the through-hole of second body, prevents that the line bits from getting into the jam that holds the intracavity and lead to behind the first body, and the line bits is difficult to the clearance.

Furthermore, a matching part 214 for matching and installing a defoaming structure is arranged in the air hole 8,

preferably, the matching part 214 is a boss protruding from the inner wall of the air hole 8, and the defoaming structure is supported on the boss.

In the above scheme, the fitting part 214 is arranged so that the mounting of the defoaming structure is simpler and more convenient. In a preferred embodiment, the matching portion 214 is a boss, the defoaming structure is supported on the boss through the mounting portion 212, no additional mounting step is needed, simplicity and convenience are achieved, and the defoaming structure cannot move under the action of gravity. The first body protrudes towards the outer cylinder 2, and the outer diameter of the first body is smaller than the inner diameter of the boss. Preferably, installation department 212 and the bleeder vent 8 sliding fit more than the boss, easy to assemble and maintenance, there is not the gap between bleeder vent and the installation department, prevents that the foam from overflowing from the gap between installation department 212 and the bleeder vent 8.

Further, the defoaming structure further includes a pick-and-place unit 213 for facilitating the pick-and-place of the defoaming structure,

preferably, one end of the pick-and-place part 213 is connected to the mounting part 212, the other end extends to the second body direction to be higher than the edge of the vent hole 8,

more preferably, the other end of the pick-and-place part 213 is further provided with a grabbing part suitable for grabbing by hand,

preferably, the taking and placing part 213 is integrally formed on the mounting part 212.

In the above scheme, the taking and placing part 213 is provided to facilitate taking out or placing in the defoaming structure because the aperture of the air hole 8 is small and inconvenient to operate. In a preferred embodiment, the other end of the taking and placing part 213 extends to a position higher than the edge of the air hole 8, so that the defoaming structure can be easily and conveniently taken out/put in without the need of fingers extending into the air hole 8. In a more preferred embodiment, the gripping part may be a bar/strip structure perpendicular to the pick-and-place part 213. Preferably, the taking and placing portion 213 is integrally formed on the mounting portion 212, so that no additional parts are required, the structure is simple, and the forming is convenient.

EXAMPLE five

As shown in fig. 7 and fig. 10 to 12, the present embodiment is a further limitation of the first embodiment, and in the present embodiment, discloses a washing machine, including:

an outer cylinder 2;

a water inlet tank assembly 1;

the water inlet end of the water inlet hose 6 is connected with the water inlet groove component 1, the water outlet end of the water inlet hose 6 is connected with the outer barrel 2, and a defoaming structure 200 for breaking foam overflowing from the outer barrel 2 into liquid is arranged in the water inlet hose 6.

In the above solution, the washing machine in this embodiment may be a drum washing machine. The washing machine is internally provided with a water inlet tank assembly 1, the water inlet tank assembly 1 comprises a water inlet box and a distributor box, and in general, the outer barrel 2 and the water inlet tank assembly 1 are connected by a water inlet hose 6, so that water or detergent or a mixed liquid of the water and the detergent can be conveniently fed into the outer barrel 2. In the washing process, when a high-foam detergent is used or the added detergent is excessive, a large amount of foam can be caused in the barrel, the excessive foam can enter the water inlet tank assembly 1 along the water inlet hose 6, or the foam can flow out of the machine from the machine in the machine spin-drying process, so that the use of a user is influenced, and great inconvenience and economic loss are brought to the user. In this application be equipped with defoaming structure 200 in the hose 6 of intaking, defoaming structure 200 breaks into liquid with the foam that urceolus 2 spilled over, prevents that the foam from spilling over to intake tank subassembly 1, spills over outside the washing machine even.

Further, the defoaming structure 200 rotates when the water inlet hose 6 is filled with water to form an opening between the defoaming structure and the water inlet hose 6, which facilitates water inlet, and resets after water inlet is finished to block and eliminate foam when the foam enters the water inlet hose 6;

preferably, the defoaming structure 200 is disposed in the water inlet end and at a position higher than the water outlet end.

In the above solution, when water enters, the defoaming structure 200 has a structure that the water inlet path inside the water inlet hose 6 is opened by unidirectional rotation, that is, the defoaming structure rotates under the impact of water to form an opening with the water inlet hose, so as to facilitate water inlet; after water inlet is finished, the defoaming structure resets, and defoaming effect can be realized when foam enters the hose. The position of the defoaming structure 200 is higher than the water outlet end, so that foam can be broken into liquid and then flows into the outer barrel 2, and the foam cannot continuously overflow to the water inlet tank assembly 1.

Further, the defoaming structure 200 includes a defoaming portion 220, the defoaming portion 220 includes a body for blocking and squeezing the foam, the body is provided with a ventilation through hole,

preferably, a plurality of through holes are distributed on the body to form a net-shaped body,

more preferably, the mesh-shaped body is honeycomb-shaped,

preferably, the through holes are the same in shape and size and are uniformly distributed.

In the above scheme, the body blocks the foam and plays the effect of extrusion foam when the foam is many, and the foam breaks into liquid under the extrusion, still be equipped with ventilative through-hole on the body, so defoaming portion 220 both can realize breaking into liquid with the foam, can guarantee pressure and external intercommunication in urceolus 2 again, in addition, defoaming portion 220 can also prevent that the thread scraps from getting into the intake antrum subassembly, erodees foam structure 200 when intaking again, erodees the thread scraps that will adhere to it in advancing the urceolus to prevent that the thread scraps from blockking up that the defoaming structure can't realize the inside and outside gaseous intercommunication of urceolus. In a preferred embodiment, a plurality of through holes, that is, a plurality of through holes, are distributed on the body to form a net shape, so that the foam can be broken into liquid, and the pressure in the outer cylinder 2 can be ensured to be communicated with the outside. The net-shaped body like a filter screen is a common structure, and has the advantages of simple and convenient production and low cost. Especially, the honeycomb-shaped net-shaped body has good defoaming effect due to small and dense meshes and can ensure that the pressure in the outer barrel 2 is communicated with the outside.

Further, the defoaming portion 220 further includes a mounting ring 221, and the mounting ring 221 is disposed at the periphery of the mesh body and is used for mounting and fixing the mesh body.

In the above scheme, the collar 221 is used for installing fixed netted body, because some sharp-pointed filiform appears unavoidably in the edge of netted body such as filter screen, with the 6 direct contact of water inlet hose, easy fish tail hose, also easy fish tail operating personnel's hand during the installation, consequently, need set up collar 221, both conveniently install fixed to netted body, prevent netted body edge fish tail equipment and operating personnel again.

Further, the defoaming structure 200 further includes a first connecting portion 222 for installing the defoaming portion 220 in the water inlet end, the first connecting portion 222 is connected to at least a part of the peripheral edge of the defoaming portion 220, and the defoaming portion 220 rotates with the connection of the first connecting portion 222 and the defoaming portion 220 as a pivot;

preferably, the connection portion is made of an elastic material to provide a restoring force after the rotation of the defoaming portion 220;

more preferably, the first connection portion 222 is integrally formed with a peripheral edge of the bubble removing portion 220.

In the above scheme, the junction is made by elastic material for defoaming portion 220 can rotate around first connecting portion 222 under the pressure effect when pressure of intaking is big, makes into convenient and fast more, resumes the normal position under the elasticity effect after pressure of intaking disappears, realizes the defoaming effect. The first connecting portion 222 and the defoaming portion 220 are integrally formed, so that the number of parts is small, and additional installation is not required.

Further, the first connection portion 222 includes a transition section protruding in the radial direction of the defoaming portion 220, and a connection section connected to the transition section and extending in the axial direction of the defoaming portion 220, the defoaming portion 220 is installed in the water inlet end through the connection section,

preferably, the transition section is made of an elastic material, and the defoaming portion 220 rotates relative to the connection section under the elastic action of the transition section itself.

In the above scheme, the connection is realized by the connecting section, and the rotation of the defoaming portion 220 is realized by the transition section. Make defoaming portion 220 can rotate around the linkage segment under the pressure effect when pressure of intaking is big for it is convenient and fast more to intake. After the water inlet pressure disappears, the original position is recovered under the elastic action of the transition section, and the defoaming effect is realized.

Further, the defoaming structure 200 further includes a limiting portion 223 for limiting the rotation of the defoaming portion 220 towards the water inlet end,

preferably, the limiting portion 223 is a ring-shaped structure, and is disposed at a position close to the water outlet of the water inlet tank assembly 1 relative to the defoaming portion 220,

more preferably, the inner diameter of the stopper 223 is larger than the outer diameter of the mesh body and smaller than the outer diameter of the mounting ring 221.

In the above solution, the limiting portion 223 limits the defoaming portion 220 to rotate only in one direction. The limiting portion 223 may be a protrusion disposed in the water inlet hose 6, or other detachable structure disposed in the water inlet hose 6 for blocking the rotation of the defoaming portion 220. Spacing portion 223 sets up in the position that is close to inlet channel subassembly 1 delivery port for defoaming portion 220, and spacing defoaming portion 220 rotates to the direction of inlet channel subassembly 1 delivery port, prevents that defoaming portion 220 can not in time resume the phenomenon of losing defoaming function that the normal position leads to and takes place. In the preferred embodiment, spacing portion 223 is the loop configuration, and is spacing effectual, and the rotation of all-round spacing defoaming portion 220 is again because the internal diameter of spacing ring is greater than netted body and is less than collar 221, can not block netted body, does not influence defoaming and ventilative effect.

Further, the defoaming structure 200 further includes a second connecting portion 224 connecting the defoaming portion 220 and the position limiting portion 223, the second connecting portion 224 is connected with the position limiting portion 223,

preferably, the second connection portion 224 is connected with the first connection portion 222,

more preferably, the second connecting portion 224 is snapped with the first connecting portion 222,

preferably, the second connecting portion 224 is integrally formed on the stopper portion 223.

In the above embodiment, the second connecting portion 224 is connected to the stopper portion 223, and connects the stopper portion 223 and the defoaming portion 220 together. In a preferred embodiment, the second connection portion 224 is connected to the first connection portion 222 to connect the bubble removing portion 220 and the stopper portion 223. More preferably, the second connecting portion 224 connects the bubble removing portion 220 and the stopper portion 223 by being engaged with the first connecting portion 222. It is also preferable that the second connecting portion 224 is integrally formed on the stopper portion 223, and no additional parts are required, thereby simplifying the stopper portion 223 and the installation thereof.

Further, the second connecting portion 224 includes a buckle protruding from the limiting portion 223, a clamping groove matching with the buckle is disposed on the connecting section of the first connecting portion 222, the buckle and the clamping groove are disposed to make the installation of the buckle and the clamping groove simple and convenient, and no additional component is needed to implement the installation,

preferably, the buckle is a sheet structure protruding along the edge of the limiting part 223, the clamping groove is a groove-shaped structure extending from the side wall of the connecting section along the circumferential direction of the defoaming part 220, the buckle and the clamping groove are rotationally clamped, the structure is simple, the installation is convenient,

more preferably, the edge of the limit buckle is provided with an anti-falling bulge for preventing the buckle from separating from the clamping groove,

still preferably, the limiting portion 223 is provided with an avoiding opening which facilitates clamping of the buckle and the clamping groove.

Further, the defoaming structure 200 further includes a blocking portion for preventing the defoaming portion 220 from separating from the annular structure of the limiting portion 223 towards the water inlet end,

preferably, the blocking portion is a strip-shaped structure disposed in the annular structure of the limiting portion 223,

more preferably, the blocking portion is disposed on the position of the position limiting portion 223 far from the first connection portion 222.

In the above scheme, spacing portion 223 is the loop configuration, if collar 221 has elasticity, under the condition that produces a large amount of foams, can break away from the loop configuration and to the upset of the end direction of intaking, sets up the stop part, prevents that defoaming portion 220 from breaking away from spacing portion 223 loop configuration to the end direction of intaking to avoid defoaming portion 220 upset to lose the defoaming effect and prevent that defoaming portion 220 can't resume the normal position after overturning. Preferably, the defoaming portion of the strip structure is disposed at a position away from the first connecting portion 222 on the limiting portion 223, so as to prevent the defoaming portion from turning over when the defoaming portion begins to turn over towards the water inlet end.

Further, be equipped with in the end of intaking and install defoaming structure 200 with defoaming structure 200 cooperation installation convex part, the external diameter of defoaming portion 220 is less than the internal diameter of installation convex part, the external diameter of spacing portion 223 is greater than the internal diameter of installation convex part.

In the above scheme, set up the installation convex part, make things convenient for defoaming structure 200's installation for defoaming structure 200 has the position that can support and lean on in water inlet hose 6, prevents that it from advancing water inlet hose 6 other positions under the pressure of intaking. The external diameter of defoaming portion 220 is less than the internal diameter of installation convex part for defoaming portion 220 can realize rotating in intake hose 6, the external diameter of spacing portion 223 is greater than the internal diameter of installation convex part, prevents that defoaming structure 200 from slipping into intake hose 6 other positions under the pressure of intaking, and makes intake hose 6 not have other gaps and can supply the foam to get into intake tank subassembly 1 and then spill over outside the washing machine.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. A drum washing machine comprises a water inlet tank assembly and an outer drum, wherein the water inlet tank assembly is communicated with a water inlet of the outer drum; the water inlet of the outer cylinder is arranged at the front end of the outer cylinder, and the foam detection port is arranged at the rear end of the outer cylinder; the height of the position of the foam detection port is higher than that of the water inlet of the outer barrel;

the water inlet tank assembly is provided with an overflow port, the position of the overflow port is higher than the height of a water inlet of the outer cylinder, and the position of the foam detection port is lower than the height of the overflow port of the water inlet tank assembly;

and a protective structure is arranged on the inner wall of the outer cylinder close to the edge of the foam detection port, and the protective structure protrudes inwards relative to the inner wall of the outer cylinder.

2. A drum washing machine according to claim 1, characterized in that the bubble detection port is provided at an upper portion of the rear end of the outer tub.

3. A drum washing machine according to claim 1, characterized in that the bubble detection port is provided on the outer tub at the rear side of the bottom of the inner tub.

4. A drum washing machine according to any one of claims 1-3, characterized in that the edge of the bubble detection port protrudes a certain distance to the outside of the outer tub to form a mounting hole; the foam detection device is a probe detection device which is fixedly arranged in the mounting pore channel, and the detection end of the probe detection device extends towards the inside of the outer cylinder and is close to the inner wall of the outer cylinder or extends into the inside of the outer cylinder.

5. A drum washing machine according to claim 4, characterized in that the probe detection device comprises a first detection probe and a second detection probe, and the detection end of the first detection probe and/or the second detection probe is positioned in the foam detection port and flush with the inner wall of the outer drum.

6. A drum washing machine according to any of claims 1-3, characterized in that the shielding structure comprises a waterproof rib, which is provided at least at the front side of the suds detection port.

7. A drum washing machine as claimed in claim 6, characterized in that the peripheral edges of the foam detecting port extend a certain distance towards the inside of the outer drum to form an annular waterproof rib.

8. A control method of a drum washing machine as claimed in any one of claims 1 to 7, characterized in that the drum washing machine comprises a water inlet tank assembly and an outer drum, the water inlet tank assembly is communicated with the water inlet of the outer drum, the outer drum of the drum washing machine is further provided with a foam detection port, the foam detection port is provided with a foam detection device for detecting foam in the washing machine, if the foam detection device detects foam within a certain detection time, a signal is transmitted to the control device of the washing machine, and the washing machine gives an alarm and/or performs defoaming treatment.

9. A control method of a drum washing machine as claimed in claim 8, characterized in that the bubble detection device is a probe detection device, and when the bubbles of the washing machine are excessive and overflow upwards to the bubble detection port during the operation of the washing machine, the probe detection device generates a signal after contacting the bubbles and transmits the signal to the control device of the washing machine.

10. The control method of a drum washing machine according to claim 9, characterized in that the control device judges the presence or absence of bubbles and/or the amount of bubbles by detecting the current and/or conductivity change of the device through the probe.

11. The control method of a drum washing machine according to claim 8, wherein the detection time is longer than the time for the drum washing machine to perform the sloshing water flow.

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