CN109355864B - Drum washing machine and control method - Google Patents

Abstract

The invention discloses a drum washing machine and a control method. The drum washing machine of the invention comprises a water inlet trough assembly and an outer tub, the water inlet trough assembly is communicated with the water inlet of the outer tub, and the outer tub 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. 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. In the drum washing machine of the present invention, the foam detection port and the foam detection device are additionally arranged on the outer tub, so that the overflow of the foam can be known in time, so as to prevent the foam from overflowing from the overflow port, avoid damage to electrical components, and avoid potential safety risks, which is beneficial to The safe operation of the washing machine improves the user experience.

Description

Drum washing machine and control method

technical field

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

Background technique

In order to improve the cleaning effect of clothes, washing powder or detergent needs to be put in when washing clothes in the washing machine, and the rich foam can clean clothes more easily. In a general drum washing machine, the water inlet tank assembly is arranged on the upper part of the washing tub, and has a throwing port that communicates with the outer tub. The detergent box is placed in the water inlet tank assembly. When the washing machine enters the water, the external water can pass the detergent box and the injection port of the water inlet tank assembly to bring the detergent into the outer cylinder. In this way, the outer cylinder passes through the injection port and the water inlet tank assembly. , The detergent box can communicate with the outside world.

In order to prevent the washing machine from malfunctioning and continuously entering water, too much water overflows upwards and damages the circuit board and other important electrical components on the side of the water inlet assembly. The wall on the side of the water inlet assembly facing away from the electrical components is generally provided with an overflow port. In the case of too much water in the tank, the water can be guided into a specific area to flow out. Therefore, the overflow is a protective structure to protect important electrical components.

Under normal circumstances, the water in the washing machine will not overflow to the overflow port, but when too much laundry detergent or washing powder is put in the inner tub, the foam overflows upward and often flows out of the overflow port, which is easy to corrode the metal parts inside the washing machine or flow into the washing machine. There are safety risks in the line terminals, and may also flow to the ground outside the washing machine, affecting the surrounding environment, affecting user experience, and causing inconvenience and economic losses to users.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drum washing machine and a control method. In the drum washing machine of the present invention, the foam detection port and the foam detection device are additionally arranged on the outer tub, so that the overflow of the foam can be known in time, so as to prevent the foam from overflowing from the overflow port, avoid damage to electrical components, and avoid potential safety risks, which is beneficial to The safe operation of the washing machine improves the user experience.

In order to solve the above-mentioned technical problems, the basic conception of the technical scheme adopted in the present invention is:

The first object of the present invention is to provide a drum washing machine. The drum washing machine includes a water inlet trough assembly and an outer cylinder, the water inlet trough assembly is communicated with the water inlet of the outer cylinder, and the outer cylinder 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.

In a further scheme, 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;

Preferably, the foam detection port is arranged on the upper part of the rear end of the outer cylinder;

Preferably, the foam detection port is located on the outer cylinder on the rear side of the bottom of the inner cylinder.

Further scheme, the height of the position of the foam detection port is not lower than the position height of the water inlet of the outer cylinder;

Preferably, the height of the position of the foam detection port is higher than the height of the water inlet of the outer cylinder.

In a further scheme, the water inlet tank assembly is also provided with an overflow port, and the position of the overflow port is higher than the height of the water inlet of the outer cylinder; 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 out of the outer cylinder for a certain distance to form an installation hole; the foam detection device is a probe detection device, and the probe detection device is fixedly arranged in the installation hole , and its detection end extends inside the outer cylinder, close to the inner wall of the outer cylinder or protrudes into the interior of the outer cylinder.

In a further solution, the probe detection device includes a first detection probe and a second detection probe, and the detection ends of the first detection probe and/or the second detection probe are located in the foam detection port, and are connected with the foam detection port. The inner wall of the outer cylinder is flush.

In a further solution, a protective structure is provided on the inner wall of the outer cylinder near the edge of the foam detection port, and the protective structure protrudes inwardly relative to the inner wall of the outer cylinder;

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

Preferably, the surrounding edges of the foam detection port all extend and protrude from the inside of the outer cylinder for a certain distance to form an annular waterproof rib.

The second object of the present invention is to provide a control method for a drum washing machine. The drum washing machine includes a water inlet trough assembly and an outer cylinder, the water inlet trough assembly is communicated with the water inlet of the outer cylinder, and the outer cylinder 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 issues an alarm and/or performs defoaming. deal with.

In a further solution, the foam detection device is a probe detection device. During the operation of the washing machine, when the washing machine has too much foam and overflows to the foam detection port, the probe detection device contacts the foam and generates a signal and transmits it to the washing machine. control device;

Preferably, the control device judges the presence or absence of foam and/or the amount of foam through the change of current and/or conductivity of the probe detection device.

In a further solution, the detection time is longer than the time for the drum washing machine to perform the stirring water flow.

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

1. In the drum washing machine of the present invention, by additionally setting a foam detection port and a foam detection device on the outer cylinder, the overflowing situation of the foam can be known in time, so as to prevent the foam from overflowing from the overflow port, avoid damage to electrical components, and avoid potential safety risks, It is conducive to the safe operation of the washing machine and improves the user experience.

2. The foam detection port of the present invention is located at the upper part of the rear end of the outer cylinder, and its position height is not only higher than the water inlet of the outer cylinder, but also lower than the overflow port of the water inlet tank assembly, so it does not affect the water inlet, but also can be on the foam. Detect foam and react before overflowing to the overflow to avoid foam overflow and protect electrical components and the surrounding environment.

3. A protective structure for waterproofing is also provided around the foam detection port of the present invention to prevent the foam detection device from making misjudgments; in addition, when the foam detection device detects, the detection time also needs to be longer than the time when the drum washing machine executes the stirring water flow. , so as to increase the accuracy of detection and judgment and further prevent misjudgment.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

Fig. 1 is the side view structure schematic diagram of the drum washing machine outer tub and the water inlet trough assembly of the present invention;

Fig. 2 is the front view structure schematic diagram of the drum washing machine outer tub and the water inlet trough assembly of the present invention;

Fig. 3 is a kind of B-B sectional structure schematic diagram of the structure of Fig. 2;

Fig. 4 is the enlarged structural representation of part a of Fig. 3;

Fig. 5 is another B-B sectional structure schematic diagram of the structure of Fig. 2;

Fig. 6 is the enlarged structural representation of part b of Fig. 5;

Fig. 7 shows the schematic diagram of the washing machine of the present invention;

Fig. 8 shows the C-C sectional view of Fig. 7;

Fig. 9 shows the enlarged view of D part of Fig. 8;

Figure 10 shows a cross-sectional view taken along the line E-E of Figure 7;

FIG. 11 shows an enlarged view of the F part 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 water inlet tank assembly, 2 outer cylinder, 3 inner cylinder, 4 overflow port, 5 water outlet, 6 water inlet hose, 7 water inlet, vent hole 8, vent pipe 9;

100 foam detection port, 101 foam detection device, 102 installation hole, 103 protective structure, 110 probe detection device, 111 first detection probe, 112 second detection probe, 113 mounting bracket, 114 cover;

120 float sensor device, 121 float ball, 122 reed switch, 123 non-magnetic tube, 124 limit platform;

200 defoaming structure,

210 first defoaming part, 211 second defoaming part, 212 mounting part, 213 pick and place part, 214 matching part;

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

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, 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 to illustrate the present invention , but 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. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

Example 1

As shown in FIGS. 1-6 , this embodiment provides a drum washing machine. The drum washing machine includes a water inlet trough assembly 1 and an outer tub 2 . The water inlet trough assembly 1 communicates with the water inlet 7 of the outer tub 2 . A foam detection port 100 is also provided, and the foam detection port 100 is provided with a foam detection device 101 for detecting foam in the washing machine.

The water inlet assembly 1 is generally installed on the upper part of the drum washing machine. The water inlet assembly 1 includes a water inlet box and a detergent box. The detergent box is placed in the water inlet box. Next to the water inlet box are electrical components such as circuit boards. A water outlet 5 is provided at the bottom of one side of the water inlet box, and the water outlet 5 communicates with the water inlet 7 of the outer cylinder 2 through a water inlet hose 6 . When the washing machine enters the water, the external water can bring the detergent into the outer cylinder 2 and the inner cylinder 3 through the water outlet 5 of the water inlet box, the water inlet hose 6, and the water inlet 7 of the outer cylinder 2. When too much laundry detergent or washing powder is put into the inner cylinder 3 and the outer cylinder 2, the foam will overflow upwards, and will overflow into the water inlet tank assembly 1 through the water inlet 7 of the outer cylinder 2 and overflow, affecting the electrical components and the surrounding environment. .

In this solution, a foam detection port 100 is additionally provided on the outer tub 2, and a foam detection device 101 is provided in the foam detection port 100. The foam detection device 101 is electrically connected to the control device of the washing machine and can transmit signals to the control device of the washing machine. In this way, the foam detection device 101 can detect the overflow of foam in time, and transmit it to the control device of the washing machine to control to avoid foam overflow, avoid damage to electrical components, and avoid potential safety risks, which is beneficial to the safe operation of the washing machine and improves the user experience. experience.

In this solution, the foam detection device 101 can be various devices capable of detecting foam, which can be probe detection, float ball 121 detection, or other sensor detection, which can detect foam.

In a further solution, 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” mentioned in the present invention are both described in terms of the orientation of the existing drum washing machine.

The water inlet 7 of the outer cylinder 2 is opened on the upper part of the front end of the outer cylinder 2, which is convenient to communicate with the water outlet 5 of the water inlet box through the water inlet hose 6, and also facilitates the installation and fixing of the water inlet tank assembly 1. The foam detection port 100 is arranged at the rear end of the outer cylinder 2, that is, it does not affect the installation of the water inlet tank assembly 1, nor does it affect the connection between the water outlet 5 of the water inlet box and the water inlet 7 of the outer cylinder 2, and the foam detection device 101 can also be installed. , the function of detecting the foam height inside the washing machine.

As a preferred solution, the foam detection port 100 is arranged at the upper part of the rear end of the outer cylinder 2. In this way, the foam detection port 100 has a certain height, the normal level of foam will not trigger the foam detection device 101, only when the foam overflows to a certain level The foam detection device 101 will be triggered only when the height is high. The foam detection device 101 works intermittently, which is conducive to saving energy and avoiding waste of resources.

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

In the drum washing machine, the inner tub 3 is arranged inside the outer tub 2 , and the inner tub 3 and the outer tub 2 are coaxially arranged. The bottom of the inner cylinder 3 and the bottom of the outer cylinder 2 are arranged adjacent to each other at a certain distance, so as to facilitate the rotation of the inner cylinder 3 . The foam detection port 100 of this solution is located on the outer cylinder 2 on the rear side of the bottom of the inner cylinder 3 . One is to avoid affecting the rotational movement of the inner cylinder 3 , and the other is to facilitate the detection of foam.

In a further solution, 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 mouth to the ground, or the height from the mouth to the lowest position of the outer cylinder 2 . The height of the position of the foam detection port 100 is higher than the position height of the water inlet 7 of the outer cylinder 2, or the same as the position height of the water inlet 7 of the outer cylinder 2, so as to ensure the normal water intake of the washing machine and avoid the overflow of water from the foam detection port 100. Water splashing can be avoided when washing with high water level. In a preferred solution, the height of the position of the foam detection port 100 is higher than the height of the water inlet 7 of the outer cylinder 2 .

In a further scheme, the water inlet trough assembly 1 is also provided with an overflow port 4, and the position of the overflow port 4 is higher than the height of the water inlet 7 of the outer cylinder 2; the position of the foam detection port 100 is not higher than the The height of the overflow port 4 to prevent foam from overflowing from the overflow port 4.

The overflow port 4 of the water inlet tank assembly 1 is opened on the side wall of the water inlet box on the side facing away from the circuit board. When there is too much water in the outer cylinder 2 and the inner cylinder 3, the water can be guided into the side with less electrical components. , minimize the damage of important circuit boards and electrical components and avoid more serious accidents.

The position and height of the foam detection port 100 in this embodiment is not only higher than the water inlet 7 of the outer cylinder 2, but also lower than the overflow port 4 of the water inlet tank assembly 1, so it does not affect the water intake, and can also overflow to the overflow port 4 when the foam overflows. Detect foam before reacting to avoid foam overflow and protect electrical components and the surrounding environment.

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 solution, the edge of the foam detection port 100 protrudes and extends for a certain distance outside the outer cylinder 2 to form an installation hole 102 , and the foam detection device 101 can be installed in the installation hole 102 .

Further, in this embodiment, the central axis of the foam detection port 100 can be set perpendicular to the central axis of the outer cylinder 2, and can also be set parallel to the central axis of the outer cylinder 2 or set at a certain angle, as long as the foam detection port 100 has a central axis. The height should not be lower than the height of the water inlet 7 of the outer tub 2, so as to ensure the normal water intake of the washing machine and to prevent the water from overflowing from the foam detection port 100.

A cover body 114 covering the opening of the foam detection port 100 may also be provided. The cover body 114 can be detachably arranged to close the end of the foam detection port 100 facing the outside of the outer cylinder 2 . A mounting bracket 113 may also be provided on the side of the cover body 114 facing the inside of the outer cylinder 2 for mounting and fixing the foam detection device 101 .

As a preferred solution, the foam detection port 100 is arranged on the upper part of the rear end of the outer cylinder 2, and the central axis is perpendicular to the central axis of the outer cylinder 2. The foam detection port 100 is also provided with a detachable cover 114 covering its opening.

In a further solution, a protection structure 103 is provided on the inner wall of the outer cylinder 2 near the edge of the foam detection port 100 , and the protection structure 103 protrudes inwardly relative to the inner wall of the outer cylinder 2 . The protective structure 103 can prevent the foam at normal water level from being vibrated to trigger the foam detection device 101 to avoid misjudgment. The protective structure 103 can be a separate piece installed on the inner wall of the outer cylinder 2, close to the edge of the foam detection port 100, or can be formed by the inner wall of the outer cylinder 2 protruding inward for a certain distance.

Preferably, the protective structure 103 includes a waterproof rib, and the waterproof rib is disposed at least on the front side of the foam detection port 100 . The front side described in this solution is the side away from the bottom of the outer cylinder 2 and close to the front end of the outer cylinder 2 , and this side is closer to the bottom of the inner cylinder 3 . During the rotation of the inner cylinder 3, splashing water and foam are likely to be generated. A waterproof rib is provided on the front side of the foam detection port 100, which is also a water retaining rib, which can prevent the splashing water and foam from triggering the foam detection device 101 and avoid misjudgment.

Preferably, the surrounding edges of the foam detection port 100 all extend and protrude from the inside of the outer cylinder 2 by a certain distance to form an annular waterproof rib. In this solution, waterproof ribs are arranged on the surrounding edges of the foam detection port 100, which can better play a protective role and better prevent the occurrence of misjudgment.

In addition, this embodiment also provides a control method for a drum washing machine, specifically:

The drum washing machine includes a water inlet trough assembly 1 and an outer cylinder 2. The water inlet trough assembly 1 is communicated with the water inlet 7 of the outer cylinder 2. The outer cylinder 2 of the drum washing machine is also provided with a foam detection port 100, and the foam detection port 100 is provided with There is a foam detection device 101 for detecting foam in the washing machine. If the foam detection device 101 detects foam within a certain detection time, it will transmit a signal to the control device of the washing machine, and the washing machine will issue an alarm and/or perform defoaming treatment.

The drum washing machine of this solution is provided with an alarm device and a defoaming device, which are respectively connected with the control device of the washing machine. When the foam detection device 101 detects the foam within a certain detection time, it transmits a signal to the control device of the washing machine, and the control device of the washing machine controls the alarm device to issue an alarm to remind the user, or automatically controls the defoaming device to work for defoaming.

In a preferred solution, the detection time is longer than the time for the drum washing machine to perform agitated water flow, so as to exclude splashes and foam generated by the washing machine executing the agitated water flow to trigger the foam detection device 101, thereby avoiding misjudgment.

Embodiment 2

As shown in FIG. 3 and FIG. 4 , this embodiment is a further limitation of Embodiment 1. In this embodiment, the foam detection device 101 is a probe detection device 110 , and the edge of the foam detection port 100 protrudes and extends to the outside of the outer cylinder 2 A certain distance is formed to form an installation hole 102, the probe detection device 110 is fixedly arranged in the installation hole 102, and its detection end extends inside the outer cylinder 2, close to the inner wall of the outer cylinder 2 or protrudes into the interior of the outer cylinder 2, thereby Guarantee the accuracy of detecting foam.

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

This method will not hinder the installation of the inner cylinder 3, and can detect the foam at the foam detection port 100 at the first time, which is convenient for quickly transmitting a signal to the washing machine, and the washing machine responds quickly and makes processing to avoid foam overflow.

In a further solution, the foam detection port 100 is provided at the upper part of the rear end of the outer cylinder 2, and the central axis is perpendicular to the central axis of the outer cylinder 2. The foam detection port 100 is also provided with a detachable cover 114 covering its opening. A mounting bracket 113 is also provided on the side of the cover body 114 facing the inside of the outer cylinder 2, and the first detection probe 111 and the second detection probe 112 of the probe detection device 110 are fixed on the mounting bracket 113, 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 solution, a protective structure 103 is provided on the inner wall of the outer cylinder 2 near the edge of the foam detection port 100, and the protective structure 103 protrudes inward relative to the inner wall of the outer cylinder 2; preferably, the foam detection port The surrounding edges of the 100 all extend and protrude a certain distance from the inside of the outer cylinder 2 to form a ring-shaped waterproof rib to prevent splashing water and foam from triggering the foam detection device 101 and avoid misjudgment.

In addition, this embodiment also provides a control method for a drum washing machine, specifically:

During the operation of the washing machine, when the washing machine has too much foam and overflows to the foam detection port 100, the probe detection device 110 generates a signal after contacting the foam and transmits it to the control device of the washing machine; The change of current and/or conductivity between the second detection probes 112 determines the presence or absence of foam and/or the amount of foam, and then controls the alarm device to issue an alarm to prompt the user, or automatically controls the defoaming device to work for defoaming.

In a further solution, the detection time is longer than the time for the drum washing machine to perform agitated water flow, thereby eliminating the situation where splashing water and foam generated by the washing machine performing agitated water flow trigger the foam detection device 101, thereby avoiding misjudgment.

Embodiment 3

As shown in FIGS. 5 and 6 , this embodiment is a further limitation of Embodiment 1. In this embodiment, the foam detection device 101 is a float sensor device 120 , and the outer cylinder 2 is provided with a foam detection port 100 A float sensing device 120 is arranged at the foam detection port 100. When the foam in the washing machine overflows to approach the foam detection port 100, the float sensing device 120 generates a signal and transmits it to the control device of the washing machine.

In this solution, the float sensing device 120 is used to detect the foam. When the inside of the washing machine overflows to a certain extent, part of the structure of the float sensing device 120 will be driven to change the state of the float sensing device 120 . Since splashing water and foam cannot change the state of the float sensing device 120, the float sensing device 120 can detect the height of the foam more accurately to a certain extent, so as to avoid misjudgment.

In a further solution, the edge of the foam detection port 100 protrudes and extends for a certain distance outside the outer cylinder 2 to form an installation hole 102; the float sensing device 120 is fixedly arranged in the installation hole 102, including a dry reed inside. The non-magnetically conductive tube 123 of the tube 122 and the floating ball 121 sleeved on the non-magnetically conductive tube 123, when the floating ball 121 is disconnected from the reed switch 122, it is close to the inner wall of the outer cylinder 2 or protrudes into the interior of the outer cylinder 2 middle.

The upper end of the installation hole 102 is provided with a limit platform 124. The limit platform 124 is formed by the inner wall of the installation hole 102 partially protruding toward the center thereof. The reed switch 122 is located on the limit platform 124. The floating ball 121 is located below the limit platform 124;

Preferably, the circumferential inner wall of the installation hole 102 protrudes toward the center thereof to form an annular limiting platform 124 .

When the water level and foam in the washing machine are normal, the floating ball 121 is located at the lowermost end of the non-magnetically conductive tube 123 , close to the inner wall of the outer tub 2 or protruding into the interior of the outer tub 2 . At this time, the floating ball 121 is disconnected from the reed switch 122, and the float sensing device 120 does not send a signal; and when the foam in the washing machine overflows to the point where it is close to the foam detection port 100, the foam pushes the floating ball 121 to rise until the floating ball 121 and the When the reed switch 122 is close to a certain distance or is in contact, it generates a signal and transmits it to the control device of the washing machine. The control device receives the signal of abnormal water level or foam and makes the next step.

In addition, this embodiment also provides a control method for a drum washing machine, specifically:

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

In a further solution, during the running process of the washing machine, when the washing machine has too much foam and overflows to be close to the foam detection port 100, the floating ball of the float sensing device 120 rises with the foam, and within a certain detection time, it is connected with the reed switch. 122 pulls in to generate a signal and transmits the signal to the control device of the washing machine. The control device controls the alarm device to issue an alarm to prompt the user, or automatically controls the defoaming device to work for defoaming.

In a further solution, the detection time is longer than the time for the drum washing machine to perform the stirring water flow. Thus, it is excluded that the splashing water and foam generated by the washing machine running agitated water flow trigger the foam detection device 101, thereby avoiding the occurrence of misjudgment.

Embodiment 4

As shown in FIGS. 7-9 , this embodiment is a further limitation of Embodiment 1. In this embodiment, a washing machine is disclosed, which includes an outer tub 2 . There are ventilation holes 8 for air circulation between the ventilation holes 8, and the ventilation holes 8 are provided with a defoaming structure for breaking the foam overflowing from the outer cylinder 2 into liquid and guiding it back to the outer cylinder 2.

In the above solution, the existing washing machine, especially the drum washing machine, is generally provided with a ventilation hole 8 connected to the atmosphere on the outer cylinder 2, and a ventilation pipe 9, one end of the ventilation pipe 9 is connected to the ventilation hole 8 and the other end is connected to the air hole 8. Outside the outer cylinder 2 , in general, the other end of the ventilation pipe 9 is connected to the water inlet tank assembly 1 . The air pressure balance between the inside and outside of the washing machine drum is realized through the ventilation pipe 9, which improves the sensing efficiency of the water level sensor, and can shorten the water intake time. However, in the process of washing clothes in the washing machine, if the user uses excessive high-foaming detergent or adds excessive detergent, a large amount of foam will be formed in the drum, and the excess air bubbles will enter the water inlet tank assembly 1 along the ventilation hole 8 through the ventilation pipe 9 Or directly spilled out of the washing machine, or during the drying process of the machine, there will be foam flowing from the inside of the machine to the outside of the machine, affecting the use of the user and causing great inconvenience and economic loss to the user. Furthermore, in some prior art, a filter structure is provided in the ventilation pipe 9 , which not only realizes the ventilation between the outer cylinder 2 and the outside world, but also prevents the foam from overflowing through the ventilation pipe 9 . However, arranging it in the vent tube 9 increases the production cost of the vent tube 9, and cannot be taken out for maintenance when a blockage occurs, causing great inconvenience to the user. In this embodiment, the defoaming structure is arranged at the ventilation hole 8, and the foam overflowing from the outer cylinder 2 is broken into a liquid that flows back to the outer cylinder 2, which is convenient for installation and maintenance. When the defoaming structure is blocked by fluff or the like Easy to remove for cleaning.

Further, one end of the ventilation hole 8 is connected to the inside of the outer cylinder 2, and the other end extends upward to the outside of the outer cylinder 2 and is connected to the ventilation pipe 9 of the washing machine. The defoaming structure is arranged in the other end of the connection ventilation pipe 9,

Preferably, the ventilation holes 8 extend vertically upward to the outside of the outer cylinder 2 .

In the above solution, in general, the ventilation holes 8 are arranged above the washing machine, so that the overflowing foam is broken into liquid and then directly guided back to the outer tub 2 . One end of the ventilation hole 8 is connected to the inside of the outer cylinder 2, and the other end extends upward to the outside of the outer cylinder 2 to prevent the ventilation hole 8 from overflowing. , the other end will be connected to the ventilation pipe 9, the connection and disassembly of the ventilation pipe 9 is relatively simple, and the defoaming structure is arranged in the other end, which is convenient to take out for cleaning and maintenance when the defoaming structure is blocked or other problems occur.

Further, the defoaming structure includes a first defoaming part 210, the first defoaming part 210 includes a first body that blocks and squeezes the foam, and the first body is provided with a ventilating through hole,

Preferably, a plurality of through holes are distributed on the first body to form a first mesh body,

More preferably, the first mesh body is in the shape of a honeycomb,

Also preferably, the shape and size of the through holes are the same and evenly distributed.

In the above solution, the first body blocks the foam and squeezes the foam when there is a lot of foam, and the foam is broken into liquid under the action of squeezing. The part 210 can not only realize the collapse of the foam into a liquid, but also ensure that the pressure in the outer cylinder 2 is communicated with the outside world. In a preferred embodiment, a plurality of through holes are distributed on the first body, that is, a lot of through holes are distributed to form a first mesh body, which can not only burst the foam into liquid, but also ensure that the pressure in the outer cylinder 2 is different from that of the outside world. Connected. The first mesh body, such as a filter mesh, is a relatively common structure, and is simple, convenient and low-cost to produce. In particular, the honeycomb-shaped first mesh body has a small and dense mesh, and has a good defoaming effect, and can also ensure that the pressure in the outer cylinder 2 communicates with the outside world.

Further, the defoaming structure further includes a second defoaming part 211, the second defoaming part 211 includes a second body that blocks and squeezes the foam, and the second body is provided with a ventilating through hole,

Preferably, a plurality of through holes are distributed on the second body to form the second mesh body,

More preferably, the second mesh body is in the shape of a honeycomb,

Also preferably, the shape and size of the through holes are the same and evenly distributed.

In the above solution, the second body blocks the foam and plays the role of squeezing the foam when the foam is long, and the foam is broken into liquid under the squeezing action, and the second body is also provided with air-permeable through holes, so the first defoaming The part 210 can not only realize the collapse of the foam into a liquid, but also ensure that the pressure in the outer cylinder 2 is communicated with the outside world. In a preferred embodiment, a plurality of through holes are distributed on the second body, that is, many through holes are distributed to form a second mesh body, which can not only burst the foam into liquid, but also ensure that the pressure in the outer cylinder 2 and the outside Connected. The second mesh body, such as a filter mesh, is a relatively common structure, and is simple, convenient and low-cost to produce. In particular, the honeycomb-shaped second mesh body has a small and dense mesh, which has a good defoaming effect, and can also ensure that the pressure in the outer cylinder 2 communicates with the outside world. In addition, the first body and the second body are provided, the foam is subjected to two defoaming treatments, and the foam that is not completely burst by the first body is further treated, so that the defoaming effect is better.

Further, the defoaming structure further includes a mounting portion 212 for installing the defoaming structure in the ventilation hole 8, the mounting portion 212 is respectively connected with the first defoaming portion 210 and the second defoaming portion 211, and the first defoaming portion 212 is connected to the first defoaming portion 210. An accommodation cavity is formed between the foam part 210 and the second defoaming part 211,

Preferably, the mounting portion 212 is a ring-shaped structure, the outer wall of the mounting portion 212 is matched with the inner wall of the ventilation hole 8 , and the first defoaming portion 210 and the second defoaming portion 211 are both connected to the mounting portion 212 . inner wall.

In the above solution, the installation part 212 not only connects the first defoaming part 210 and the second defoaming part 211 together, but also installs the defoaming structure in the ventilation hole 8 . It is convenient to take out the first defoaming part 210 and the second defoaming part 211 together for maintenance and cleaning when maintenance is required, and it is also convenient to install the first defoaming part 210 and the second defoaming part 211 together, omitting installation and disassembly step. A accommodating cavity is formed between the first defoaming part 210 and the second defoaming part 211, which accommodates and squeezes the foam. The foam after passing through the first defoaming part 210 is pressurized, and when it suddenly enters the accommodating cavity, the volume will rapidly increase. However, due to the small volume of the accommodating cavity, the rapidly increasing foam is quickly squeezed by greater pressure, and then completely collapsed. In a preferred embodiment, the mounting portion 212 is an annular structure, the outer wall of which is matched with the inner wall of the vent hole 8 , and the annular outer wall is easier to fit with the inner wall of the vent hole 8 without leaving a gap for foam to pass through. The first defoaming part 210 and the second defoaming part 211 are both connected to the inner wall of the mounting part 212 , which is easier to fit with the inner wall of the ventilation hole 8 , avoids bumps and scratches the inner wall, and is easier to connect.

Further, the second defoaming portion 211 and the mounting portion 212 are integrally formed, and the first defoaming portion 210 and the mounting portion 212 are detachably connected.

Preferably, the first defoaming part 210 is clamped with the installation part 212, the structure is simple, and the installation is convenient.

Preferably, the mounting portion 212 is provided with a thread, and the first defoaming portion 210 is connected with the mounting portion 212 by thread, which has a simple structure and is easy to install.

In the above solution, the second defoaming part 211 and the mounting part 212 are integrally formed, which simplifies the structure and does not need to be assembled. The accommodating cavity formed between the second defoaming parts 211 is cleaned and maintained.

Further, the first body is arranged at a position close to the outer cylinder 2 and protrudes toward the outer cylinder 2, and the second body is arranged at a position away from the outer cylinder 2 and protrudes in the opposite direction to the first body set up,

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

In the above solution, the first body is protruded towards the direction of the outer cylinder 2, which is convenient for blocking the foam. The blocked foam is partially broken, and part is squeezed to the side of the protruding part, because the existence of the protruding part causes the bulge. The side of the outlet is narrow, and a lot of foam is squeezed here, which is easier to be squeezed, and the defoaming effect is better. The second body and the first body are arranged opposite to each other, in order to maximize the accommodating cavity, so that on the one hand more foam can be accommodated for extrusion and bursting, and on the other hand, the larger accommodating cavity makes the The foam will become larger when it suddenly enters a larger space without being squeezed, and it is easier to eliminate these foams. In a preferred embodiment, the first body is hemispherical, so that the distance between the first body and the inner wall of the ventilation hole 8 is getting smaller and smaller, the backlog of foam is increasing, and the pressure is getting larger and larger. Easy to burst bubbles. The second body is hemispherical, so that the space for entering the foam whose volume suddenly increases in the accommodating cavity first becomes larger and smaller, and the defoaming effect is better.

Further, the diameter of the through holes of the first body is smaller than the diameter of the through holes of the second body, and the number of the through holes of the first body is greater than the number of the through holes of the second body.

In the above solution, the foam will suddenly increase after passing through the first body, and it can still be burst before the second body. The air pressure is higher than the air pressure in front of the first body, so as to achieve the purpose of increasing the volume of the foam suddenly. The number of through holes of the first body is greater than the number of through holes of the second body, because the foam before reaching the second body is obviously less than that before the first body, so setting too many through holes will release the foam. In addition, the diameter of the through hole of the first body is smaller than the diameter of the through hole of the second body, so as to prevent clogging caused by wire chips entering the accommodating cavity after passing through the first body, and the wire chips are not easily cleaned.

Further, the ventilation hole 8 is provided with a matching portion 214 which is matched to install the defoaming structure,

Preferably, the matching portion 214 is a boss protruding from the inner wall of the ventilation hole 8 , and the defoaming structure is supported on the boss.

In the above solution, the provision of the matching portion 214 makes the installation of the defoaming structure simpler and more convenient. In a preferred embodiment, the matching portion 214 is a boss, the defoaming structure is supported on the boss by the mounting portion 212 , and no additional installation steps are required, which is simple and convenient. Under the action of gravity, the defoaming structure will not Movement occurs. Because the first body protrudes toward the outer cylinder 2, the outer diameter of the first body is smaller than the inner diameter of the boss. Preferably, the mounting portion 212 is slidably fitted with the vent hole 8 above the boss, which is convenient for installation and maintenance, and there is no gap between the vent hole and the mounting portion to prevent foam from passing through the gap between the mounting portion 212 and the vent hole 8 overflow.

Further, the defoaming structure also includes a pick-and-place portion 213 that facilitates taking out/installing the defoaming structure,

Preferably, one end of the pick-and-place portion 213 is connected to the mounting portion 212, and the other end extends toward the second body direction to be higher than the edge of the ventilation hole 8,

More preferably, the other end of the pick-and-place portion 213 is further provided with a grab portion suitable for hand grabbing,

Also preferably, the pick-and-place portion 213 is integrally formed on the mounting portion 212 .

In the above solution, because the aperture of the ventilation hole 8 is small, which is inconvenient to operate, the pick-and-place portion 213 is provided to facilitate the taking out or loading of the defoaming structure. In a preferred embodiment, the other end of the pick-and-place portion 213 extends to be higher than the edge of the ventilation hole 8 , so that the defoaming structure can be easily and conveniently taken out/inserted without putting fingers into the ventilation hole 8 . In a more preferred embodiment, the grab portion may be a rod/strip-like structure perpendicular to the pick-and-place portion 213 . It is also preferred that the pick-and-place portion 213 is integrally formed on the mounting portion 212 , no additional components are required, the structure is simple, and the molding is convenient.

Embodiment 5

As shown in FIG. 7 and FIGS. 10-12 , this embodiment is a further limitation of Embodiment 1. This embodiment discloses a washing machine, including:

outer cylinder 2;

Intake tank assembly 1;

In the water inlet hose 6, the water inlet end is connected to the water inlet tank assembly 1, and the water outlet end is connected to the outer cylinder 2. The water inlet hose 6 is provided with a defoaming structure 200 for breaking the foam overflowing from the outer cylinder 2 into liquid.

In the above solution, the washing machine in this embodiment may be a drum washing machine. The washing machine is provided with a water inlet trough assembly 1, the water inlet trough assembly 1 includes a water inlet box and a distributor box. Generally, the outer cylinder 2 and the water inlet trough assembly 1 are connected by a water inlet hose 6, which is convenient for the outer cylinder. 2. Water or detergent or a mixture of both. During the washing process, due to the use of high-foaming detergent or the excessive amount of detergent added, a large amount of foam will be generated in the drum, and the excess air will enter the water inlet tank assembly 1 along the water inlet hose 6, or be dried by the machine. During the process, there will be bubbles flowing from the inside of the machine to the outside of the machine, which affects the use of the user and brings great inconvenience and economic loss to the user. The water inlet hose 6 in the present application is provided with a defoaming structure 200, the defoaming structure 200 bursts the foam overflowing from the outer cylinder 2 into liquid, preventing the foam from overflowing into the water inlet tank assembly 1 or even out of the washing machine.

Further, the defoaming structure 200 rotates when the water inlet hose 6 enters water to form an opening for convenient water inlet between the water inlet hose 6 and the water inlet hose 6 , and resets after the water inlet is completed to allow the foam to enter the water inlet hose 6 . to block and eliminate foam;

Preferably, the defoaming structure 200 is arranged in the water inlet end, and the position is higher than the water outlet end.

In the above solution, when water is in, the defoaming structure 200 has a structure of unidirectional rotation to open the water inlet waterway inside the water inlet hose 6, that is, it rotates under the impact of water to form an opening between the water inlet hose and the water inlet hose. , in order to facilitate the water inflow; after the water inflow is completed, the defoaming structure is reset, and the defoaming effect can be realized when the foam enters the hose. The position of the defoaming structure 200 is higher than the water outlet end, and after the foam is burst into liquid, it can flow into the outer cylinder 2 again, and will not continue to overflow into the water inlet tank assembly 1 .

Further, the defoaming structure 200 includes a defoaming part 220, and the defoaming part 220 includes a body for blocking and squeezing the foam, and the body is provided with air-permeable through holes,

Preferably, a plurality of through holes are distributed on the body to form a mesh body,

More preferably, the mesh body is in the shape of a honeycomb,

Also preferably, the shape and size of the through holes are the same and evenly distributed.

In the above solution, the body blocks the foam and squeezes the foam when the foam is long, and the foam collapses into a liquid under the action of squeezing. The foam is burst into liquid, which can ensure that the pressure in the outer cylinder 2 is communicated with the outside world. In addition, the defoaming part 220 can also prevent lint from entering the water inlet component, and flush the defoaming structure 200 when the water is in. The lint attached to it is washed into the outer cylinder to prevent the lint from clogging and the defoaming structure cannot realize the communication between the inside and outside of the outer cylinder. In a preferred embodiment, several through holes are distributed on the body, that is, many through holes are distributed to form a network, which can not only burst the foam into a liquid, but also ensure that the pressure in the outer cylinder 2 communicates with the outside world. Mesh bodies such as filter nets are also relatively common structures, which are simple, convenient and low-cost to produce. In particular, the honeycomb-shaped mesh body has a small and dense mesh, which has a good defoaming effect, and can also ensure that the pressure in the outer cylinder 2 is communicated with the outside world.

Further, the defoaming part 220 further includes an installation ring 221, and the installation ring 221 is arranged on the periphery of the mesh body, and is installed and fixed to the mesh body.

In the above solution, the installation ring 221 is used to install and fix the mesh body, because the edge of the mesh body, such as the filter screen, inevitably has some sharp filaments, and if it is in direct contact with the water inlet hose 6, it is easy to scratch the hose, It is also easy to scratch the operator's hand during installation. Therefore, the installation ring 221 needs to be provided, which not only facilitates the installation and fixation of the mesh body, but also prevents the edge of the mesh body from scratching the equipment and the operator.

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 with at least part of the outer peripheral edge of the defoaming portion 220, the The defoaming part 220 rotates with the connection between the first connecting part 222 and the defoaming part 220 as a fulcrum;

Preferably, the connection part is made of elastic material, which provides the force for restoring the defoaming part 220 after rotation;

More preferably, the first connecting portion 222 is integrally formed with the outer peripheral edge of the defoaming portion 220 .

In the above solution, the connection part is made of elastic material, so that the defoaming part 220 can rotate around the first connection part 222 under the action of the pressure when the water inlet pressure is large, so that the water inlet is more convenient and fast, and the water inlet pressure disappears. Afterwards, it returns to its original position under the action of elasticity to achieve defoaming. The first connecting portion 222 and the defoaming portion 220 are integrally formed, and there are few components and no additional installation is required.

Further, the first connecting portion 222 includes a transition section that protrudes radially along the defoaming portion 220, and a connecting section that is connected to the transition section and extends axially along the defoaming portion 220. The defoaming portion 220 is connected by The section is installed in the inlet end,

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

In the above solution, the connecting section realizes the connection, and the transition section realizes both the connection and the rotation of the defoaming part 220 . The defoaming part 220 can rotate around the connecting section under the action of pressure when the water inlet pressure is high, so that the water inlet is more convenient and quicker. After the water inlet pressure disappears, it will return to its original position under the elastic force of the transition section to achieve defoaming.

Further, the defoaming structure 200 further includes a limiting portion 223 that restricts the defoaming portion 220 from rotating toward the water inlet end.

Preferably, the limiting portion 223 is an annular 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 limiting portion 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 restricts the defoaming portion 220 to rotate in only one direction. The limiting portion 223 may be a protrusion provided in the water inlet hose 6 , or other detachable structures provided in the water inlet hose 6 to block the rotation of the defoaming portion 220 . The limiting portion 223 is arranged at a position close to the water outlet of the water inlet tank assembly 1 relative to the defoaming portion 220, and the limiting defoaming portion 220 rotates in the direction of the water outlet of the water inlet tank assembly 1 to prevent the defoaming portion 220 from returning to its original state in time. The phenomenon of loss of defoaming function caused by bit occurs. In a preferred embodiment, the limiting portion 223 is a ring-shaped structure, which has a good limiting effect and can limit the rotation of the defoaming portion 220 in all directions, and because the inner diameter of the limiting ring is larger than the mesh body and smaller than the mounting ring 221 , will not block the mesh body, and will not affect the effect of defoaming and ventilation.

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

Preferably, the second connecting portion 224 is connected to the first connecting portion 222,

More preferably, the second connecting portion 224 is snap-connected with the first connecting portion 222,

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

In the above solution, the second connecting portion 224 is connected with the limiting portion 223 to connect the limiting portion 223 and the defoaming portion 220 together. In a preferred embodiment, the second connecting portion 224 is connected with the first connecting portion 222 to connect the defoaming portion 220 and the limiting portion 223 . More preferably, the second connecting portion 224 is connected to the defoaming portion 220 and the limiting portion 223 by being snapped with the first connecting portion 222 . It is also preferred that the second connecting portion 224 is integrally formed on the limiting portion 223 , and no additional components are added, which simplifies the limiting portion 223 and its installation.

Further, the second connecting portion 224 includes a buckle protruding from the limiting portion 223 , and a connecting section of the first connecting portion 222 is provided with a slot that is matched with the buckle, and the buckle and the slot are provided Make the installation of both simple and convenient, and can be achieved without additional parts,

Preferably, the buckle is a sheet-like structure protruding along the edge of the limiting portion 223 , the buckle is a groove-like structure extending from the side wall of the connecting section along the circumferential direction of the defoaming portion 220 , and the buckle is connected to the clip. The slot is rotated and clamped, the structure is simple, and the installation is convenient.

More preferably, the edge of the limit buckle is provided with an anti-separation protrusion that prevents the buckle from being separated from the slot,

It is also preferred that the limiting portion 223 is provided with an escape port for the convenience of the buckle and the clamping slot.

Further, the defoaming structure 200 further includes a blocking portion that prevents the defoaming portion 220 from being separated from the annular structure of the limiting portion 223 in the direction of 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 at a position on the limiting portion 223 away from the first connecting portion 222 .

In the above solution, the limiting portion 223 is an annular structure. If the mounting ring 221 has elasticity, in the case of a large amount of foam, it may be turned over from the annular structure to the direction of the water inlet end, and a blocking portion is provided to prevent defoaming. The part 220 is separated from the annular structure of the limiting part 223 in the direction of the water inlet end, so as to prevent the defoaming part 220 from losing the defoaming effect after turning over and preventing the defoaming part 220 from returning to its original position after turning over. Preferably, the defoaming part of the strip structure is arranged on the limiting part 223 at a position away from the first connecting part 222, so as to prevent the defoaming part from turning over in time when it begins to turn over to the water inlet end.

Further, the water inlet end is provided with a mounting convex portion for installing the defoaming structure 200 in cooperation with the defoaming structure 200 , the outer diameter of the defoaming portion 220 is smaller than the inner diameter of the mounting convex portion, and the limit of the limiting portion 223 . The outer diameter is larger than the inner diameter of the mounting boss.

In the above solution, the installation convex portion is provided to facilitate the installation of the defoaming structure 200, so that the defoaming structure 200 has a position in the water inlet hose 6 that can be abutted, preventing it from sliding into the water inlet hose 6 under the water inlet pressure. Location. The outer diameter of the defoaming portion 220 is smaller than the inner diameter of the mounting convex portion, so that the defoaming portion 220 can rotate in the water inlet hose 6, and the outer diameter of the limiting portion 223 is larger than the inner diameter of the mounting convex portion, preventing the The bubble structure 200 slides into other positions of the water inlet hose 6 under the water inlet pressure, and there is no other gap in the water inlet hose 6 for the foam to enter the water inlet tank assembly 1 and then overflow to the outside of the washing machine.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

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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