WO2023202274A1

WO2023202274A1 - Ultrasonic cleaning device and washing machine

Info

Publication number: WO2023202274A1
Application number: PCT/CN2023/081550
Authority: WO
Inventors: 刘建设; 刘尊安; 刘培飞; 于元元
Original assignee: 合肥海尔洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2022-04-22
Filing date: 2023-03-15
Publication date: 2023-10-26
Also published as: CN116971153A

Abstract

An ultrasonic cleaning device and a washing machine. The ultrasonic cleaning device comprises: a cleaning tub (1) for containing washing water; a water feeding unit (2) for feeding water into the cleaning tub (1); a water level measurement unit (4) for measuring the liquid level in the cleaning tub (1), wherein a measurement end of the water level measurement unit (4) extends into the cleaning tub (1); and a water blocking structure (5), which is arranged inside the cleaning tub (1) and is used for blocking the water fed by the water feeding unit (2) from impacting the measurement end of the water level measurement unit (4). The provision of the water blocking structure (5) on the cleaning tub (1) reduces the flow speed at which a fed water flow flows to the measurement end of the water level measurement unit (4), which prevents the fed water flow from oscillating to overflow from the cleaning tub (1), and also avoids the inaccuracy of a level measurement result of the water level measurement unit (4). Therefore, the present invention ensures that the level of fed water is accurate, prevents the fed water in the cleaning tub (1) from being insufficient or overflowing, and has a simple structure and low costs.

Description

Ultrasonic cleaning device and washing machine

Technical field

The invention belongs to the field of washing machines, and specifically relates to an ultrasonic cleaning device and a washing machine.

Background technique

A washing machine is a machine that uses mechanical force generated by electricity to clean laundry. For clothes such as shirts, collars and cuffs are generally more dirty than other parts. However, during the washing process, existing washing machines will damage the collars and cuffs of clothing. The cleaning effect in local areas is poor.

In view of the above situation, in the prior art, it is often necessary to add an additional ultrasonic washing device to the washing machine to achieve the local cleaning function.

The Chinese patent with application number CN201910441078X discloses an ultrasonic device, including a housing; a door that can be opened and closed at the front of the housing; a cleaning tank and an ultrasonic generator provided corresponding to the washing area of the cleaning tank ; The cleaning tank and the ultrasonic generator are arranged inside the housing and can move between the cleaning position and the storage position. By placing the clothes to be cleaned between the ultrasonic generator and the cleaning tank, the ultrasonic generator is started to achieve local cleaning. The housing is provided with a water inlet pipe facing the cleaning tank.

Although the above solution can realize water inlet into the cleaning tank, it cannot control the water inlet level in the cleaning tank. In this regard, a liquid level sensor can be installed in the cleaning tank to detect the liquid level in the cleaning tank to control water inflow and prevent liquid from overflowing. When the cleaning tank was filled with liquid, the liquid washed along the cleaning tank, causing the water flow to oscillate in the cleaning tank. On the one hand, the liquid easily overflowed from the cleaning tank, and on the other side, the liquid oscillated in the cleaning tank, which could easily lead to inaccurate liquid level detection and lead to cleaning The amount of water entering the tank is incorrect.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology, and the purpose is to provide an ultrasonic cleaning device that can slow down the water flow near the detection end of the liquid level detection unit and improve the accuracy of the detection results of the liquid level detection unit. This avoids the situation of insufficient liquid in the cleaning tank or overflow of liquid.

Another object of the present invention is to provide a washing machine.

In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is to provide an ultrasonic cleaning device, including:

Washing tank, used to hold washing water;

Liquid feeding unit is used to feed liquid into the cleaning tank;

A liquid level detection unit is used to detect the liquid level in the cleaning tank; the detection end of the liquid level detection unit extends into the cleaning tank;

A water-blocking structure is provided in the cleaning tank to prevent liquid from the liquid inlet unit from impacting the detection end of the liquid level detection unit.

Further, the water blocking structure is provided between the position where the liquid inlet unit injects liquid into the cleaning tank and the position where the detection end of the liquid level detection unit is in the cleaning tank.

Further, the cleaning tank includes,

Sink for washing laundry;

A guide tank, one end of which is connected to the washing tank, is used to inlet liquid and guide the incoming liquid flow to the washing tank;

The detection end of the liquid level detection unit extends into the guide groove, and the water blocking structure is provided in the guide groove.

Further, the water blocking structure extends from the other end of the guide trough to one end where the guide trough and the washing trough are connected;

Both sides of the water retaining structure form a first channel and a second channel respectively with the guide groove, the liquid inlet unit injects liquid into the first channel, and the detection end of the liquid level detection unit extends to the in the second channel;

The cleaning tank has a first water path, which enters the washing tank from the guide tank under the guidance of the first channel, circulates, and flows to the detection of the liquid level detection unit under the guidance of the second channel. end position.

Further, the water retaining structure includes,

A water-blocking boss is protrudingly provided in the guide groove and extends from the other end of the guide groove to one end where the guide groove communicates with the washing tank.

Further, a gap is provided on the water-blocking boss, and the gap is provided through both sides of the water-blocking boss and is connected to the first channel and the second channel respectively;

The cleaning tank has a second water channel that flows from the first channel through the gap, flows into the second channel, and mixes with the first water channel entering the second channel.

Further, the water blocking structure further includes a water blocking plate extending upward and disposed on the water blocking boss, located at the position where the liquid inlet unit injects liquid into the cleaning tank and the detection end of the liquid level detection unit. between positions in the wash tank.

Further, it also includes a base, the washing tank is provided on one end of the base, and the guide groove extends from the washing tank to the other end of the base;

The first channel is disposed close to an outer wall between two ends of the base.

Further, the liquid inlet unit includes a liquid inlet pipe extending above the guide groove; a liquid outlet is provided on the liquid inlet pipe and is provided downward toward the first channel;

The liquid level detection unit includes a probe, the lower end of which extends into the second channel.

The present invention also provides a washing machine having any one of the above ultrasonic cleaning devices.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

(1) The ultrasonic cleaning device of the present invention reduces the flow speed of the inlet water to the detection end of the liquid level detection unit by arranging a water retaining structure on the cleaning tank, and prevents the inlet water from oscillating and overflowing out of the cleaning tank. It also avoids inaccurate liquid level detection results of the liquid level detection unit, ensures the accurate liquid level of the inlet liquid, avoids insufficient liquid inlet or overflow of the inlet liquid, and has simple structural design and low cost.

(2) In the present invention, the inlet water flow enters the guide tank and flows into the washing tank under the guidance of the first channel on one side of the water retaining structure. After the inlet water flow swirls in the washing tank, the flow rate decreases. Under the guidance of the second channel on the other side, it flows to the detection end of the liquid level detection unit, further reducing the flow rate of the inlet water flow, effectively preventing the inlet water flow from splashing out of the cleaning tank, and also slowing down the detection of the liquid level detection unit. The fluctuation of water flow around the end improves the detection accuracy of the liquid level detection unit.

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

Description of the drawings

The drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic 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. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts. In the attached picture:

Figure 1 is a schematic diagram of an ultrasonic cleaning device of the present invention;

Figure 2 is a schematic diagram of an ultrasonic cleaning device of the present invention;

Figure 3 is a schematic structural diagram of part of the ultrasonic cleaning device of the present invention.

In the figure: 1. Cleaning tank; 11. Guide tank; 111. First channel; 112. Second channel; 12. Washing tank; 2. Liquid inlet unit; 21. Liquid outlet; 3. Ultrasonic generating unit; 31. Connection structure; 32. Ultrasonic generation module; 4. Liquid level detection unit; 41. Probe; 5. Water retaining structure; 51. Water retaining boss; 52. Gap; 53. Water retaining plate; 6. Base; 7. Fixed structure.

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

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following examples are used to illustrate the present invention. , but are not used 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", "back", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations of the invention.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

As shown in Figures 1 to 3, the present invention provides an ultrasonic cleaning device. The ultrasonic cleaning device The device includes a cleaning tank 1, a liquid inlet unit 2, a liquid level detection unit 4 and a water retaining structure 5.

The washing tank 1 is used to hold washing water for washing the items to be washed. The user can place the items to be washed or part of the clothes to be washed in the cleaning tank 1 . The liquid feeding unit 2 is used to feed liquid into the cleaning tank 1 . The liquid level detection unit 4 is used to detect the liquid level in the cleaning tank 1 . The detection end of the liquid level detection unit 4 extends into the cleaning tank 1 . The ultrasonic cleaning device controls the liquid inlet unit 2 to inject liquid into the cleaning tank 1 to a preset liquid level according to the received liquid level.

The water blocking structure 5 is provided in the cleaning tank 1 to prevent the liquid from the liquid inlet unit 2 from impacting the detection end of the liquid level detection unit 4 .

The ultrasonic cleaning device of the present invention, by arranging a water retaining structure 5 on the cleaning tank 1, reduces the flow speed of the incoming liquid water to the detection end of the liquid level detection unit 4, and avoids the oscillating flow of the incoming liquid water flow and overflowing out of the cleaning tank 1 , it also avoids inaccurate liquid level detection results of the liquid level detection unit 4, ensures the accurate liquid level of the inlet liquid, avoids insufficient liquid inlet or overflow of the inlet liquid in the cleaning tank 1, and has simple structural design and low cost.

The ultrasonic cleaning device also includes an ultrasonic generating unit 3 . The ultrasonic wave generating unit 3 is located above the cleaning tank 1 or is arranged in the cleaning tank 1 .

The liquid inlet unit 2 contains water, washing liquid, or a mixture of washing liquid and water.

Further, the water blocking structure 5 is provided between the position where the liquid inlet unit 2 injects liquid into the cleaning tank 1 and the position where the detection end of the liquid level detection unit 4 is in the cleaning tank 1, so that the cleaning tank The water flow flowing into the cleaning tank 1 first bypasses the water retaining structure 5 and then flows to the position of the detection end of the liquid level detection unit 4 in the cleaning tank 1, thus avoiding the inflow of liquid into the cleaning tank 1. The liquid flow directly impacts the detection end of the liquid level detection unit 4, causing the water flow around the detection end of the liquid level detection unit 4 to fluctuate, reducing the deviation between the liquid level detected by the liquid level detection unit 4 and the actual liquid level.

The cleaning tank 1 includes a connected guide tank 11 and a washing tank 12 .

The washing tank 12 is used for washing laundry. It can be clothing, towels or other items. One end of the guide tank 11 is connected to the washing tank 12 for feeding liquid and guiding the incoming liquid flow to the washing tank 12 . The detection end of the liquid level detection unit 4 extends into the guide groove 11 , and the water blocking structure 5 is provided in the guide groove 11 .

The water blocking structure 5 extends from the other end of the guide tank 11 to the end where the guide tank 11 and the washing tank 12 are connected. Both sides of the water retaining structure 5 form a first channel 111 and a second channel 112 with the guide groove 11 respectively. The liquid inlet unit 2 injects liquid into the first channel 111 , and the detection end of the liquid level detection unit 4 extends into the second channel 112 .

The water retaining structure 5 is arranged so that the washing tank 1 has a first water path, which enters the washing tank 12 from the guide tank 11 under the guidance of the first channel 111, circulates, and then flows in the third water channel. The liquid flows to the detection end of the liquid level detection unit 4 under the guidance of the two channels 112 .

In the present invention, the inlet water flow enters the guide tank 11, and flows into the washing tank 12 under the guidance of the first channel 111 on one side of the water retaining structure 5. Under the guidance of the second channel 112 on the other side of the water structure 5, it flows to the detection end of the liquid level detection unit 4, further reducing the flow rate of the inlet water flow, effectively preventing the inlet water flow from splashing out of the cleaning tank 1, and also slowing down the The fluctuation of the water flow around the detection end of the liquid level detection unit 4 improves the detection accuracy of the liquid level detection unit 4 .

The water-blocking structure 5 includes a water-blocking boss 51 .

The water blocking boss 51 is protrudingly disposed in the guide groove 11 and extends from the other end of the guide groove 11 to the end where the guide groove 11 and the washing tank 12 communicate. Both sides of the extension direction of the water blocking boss 51 form a first channel 111 and a second channel 112 with the guide groove 11 respectively.

By arranging the water-blocking boss 51, the present invention can guide the washing water to flow into the washing tank 12 after the washing water enters the guide tank 11. The peripheral wall of the washing tank 12 can guide the flow of the washing water, so that the washing water can be washed. The water swirls in the washing tank 12, flows from the guide tank 11 along the circumferential direction of the washing tank 12, and flows back to the guide tank 11, thereby reducing the flow rate of the wash water.

Preferably, one end of the water-blocking boss 51 is connected to the inner end surface of the other end of the guide groove 11 , and the other end extends to the connection point between the guide groove 11 and the washing tank 12 , which can avoid another obstruction of the guide groove 11 . There is a gap between one end and the water-blocking boss 51 to prevent the inlet water flow from flowing through the gap to the other side of the water-blocking boss 51 and impacting the detection end of the liquid level detection unit 4 .

The water blocking boss 51 is provided with a notch 52 , and the notch 52 is provided through both sides of the water blocking boss 51 . The notch 52 is connected to the first channel 111 and the second channel 112 respectively.

The water retaining structure 5 and the notch 52 are arranged so that the cleaning tank 1 has a second water channel, and the second water channel flows from the first channel 111 through the notch 52 and flows into the second channel 112 . The second water channel flows into the second channel 112 and then mixes with the first water channel entering the second channel 112, thereby reducing the water flow speed.

In the present invention, gaps 52 penetrating both sides of the water retaining boss 51 are provided. When the washing water flows from the liquid inlet unit 2 into the guide tank 11, it first flows in the direction of the washing tank 12 under the guidance of the first channel 111, and then reaches the At the gap 52, the second waterway with a small part of the water flow flows from the gap 52 to the second channel 112 on the other side of the water retaining boss 51, and the first waterway with most of the water flow continues in the first waterway. It flows to the washing tank 12 under the guidance of the channel 111, circulates in the washing tank 12 and then returns to the connection between the guide tank 11 and the washing tank 12, reducing the water flow speed, and then flows to The notch 52 and the second water channel at the notch 52 block each other, further reducing the water flow speed and flowing gently to the detection end of the liquid level detection unit 4 .

Preferably, the detection end of the liquid level detection unit 4 includes two probes 41 . There is a certain distance between the bottom of the probe 41 and the bottom wall of the guide groove 11 .

The incoming liquid flow eventually forms a calm water surface below the probe 41 . When the water surface reaches the height of the bottom of the probe 41, the two probes 41 are connected, and the liquid level of the water flow reaches the preset liquid level after liquid inflow, thereby controlling the water inflow to stop.

The notch 52 is provided on one end of the water blocking boss 51 close to the washing tub 12 .

In the present invention, by arranging the notch 52 on one end of the water-blocking boss 51 close to the washing tank 12 , there is a certain distance between the notch 52 and the liquid level detection unit 4 , so that the first water path can pass through the washing tank 12 When it reaches the notch 52 , it blocks each other from the second water path, and the water flow gradually slows down in the flow path to the liquid level detection unit 4 .

Preferably, the height of the water blocking boss 51 is less than or equal to the depth of the guide groove 11 .

Further, the water blocking structure 5 also includes a water blocking plate 53 . The water blocking plate 53 extends upward and is disposed on the water blocking boss 51 at a position where the liquid inlet unit 2 injects liquid into the cleaning tank 1 and the detection end of the liquid level detection unit 4 is at the cleaning tank 1 between positions.

The present invention can prevent the liquid from entering the unit by arranging a water blocking plate 53 on the water blocking boss 51 between the position where the liquid enters the cleaning tank 1 and the position of the detection end of the liquid level detection unit 4 in the cleaning tank 1 2. When liquid is fed into the guide groove 11, the gold leaf water flow splashes or the water flow is larger than the water blocking boss 51, resulting in a large deviation between the liquid level detected by the liquid level detection unit 4 and the actual liquid level.

Specifically, the water blocking structure 5 is located between the position where the liquid outlet unit supplies liquid into the cleaning tank 1 and the position where the lower end of the probe 41 is in the cleaning tank 1 .

The water blocking plate 53 extends upward beyond the opening of the guide groove 11 . Preferably, the water outlet end of the liquid inlet unit 2 is located above the water baffle 53 . The water outlet end of the liquid inlet unit 2 is close to the barrier The upper end of the water plate 53 is provided, or the water outlet end of the liquid inlet unit 2 is in contact with the upper end of the water blocking plate 53 . The liquid outlet 21 of the liquid inlet unit 2 is located above the first channel 111 .

The liquid level detection unit 4 is arranged opposite to the liquid inlet unit 2 .

Further, one end of the guide tank 11 is connected with one end of the washing tank 12 .

The ultrasonic cleaning device also includes a base 6 . The cleaning tank 1 is arranged on the upper part of the base 6 .

The washing tank 12 is provided on one end of the base 6 , and the guide slot 11 extends from the washing tank 12 to the other end of the base 6 . The guide tank 11 and the washing tank 12 are connected and arranged at a certain corner.

The first channel 111 is disposed close to an outer wall between two ends of the base 6 .

The ultrasonic wave generating unit 3 is provided on the other end of the base 6 and on one side of the guide groove 11 . The ultrasonic wave generating unit 3 is arranged close to the second channel 112 .

Furthermore, the liquid inlet unit 2 includes a liquid inlet pipe. The liquid inlet pipe extends above the guide groove 11 . The liquid inlet pipe is provided with a liquid outlet 21 , which is located downward toward the first channel 111 . The lower end of the probe 41 extends into the second channel 112 .

The ultrasonic cleaning device also includes a fixed structure 7 . The fixing structure 7 is arranged opposite to the other end of the base 6 .

One end of the liquid inlet pipe is fixed on the fixed structure 7 , and the other end of the liquid inlet pipe extends above the guide groove 11 . The liquid outlet 21 is disposed at the lower part of the other end of the liquid inlet pipe and is disposed downward toward the first channel 111 .

Further, the cleaning tank 1 and the ultrasonic generating unit 3 have a working position and a storage position. The cleaning tank 1 and the ultrasonic generating unit 3 move relative to the liquid inlet unit 2 at the same time, Switch between working position and storage position.

When the cleaning tank 1 and the ultrasonic generating unit 3 move away from the fixed structure 7 to the working position, the liquid outlet 21 at the other end of the liquid inlet pipe is set downward toward the first channel 111 . When the cleaning tank 1 and the ultrasonic generating unit 3 approach the fixed structure 7 and move to the storage position, the liquid outlet 21 at the other end of the liquid inlet pipe is set downward toward the washing tank 12 .

Figure 1 is a schematic diagram of the cleaning tank 1 and the ultrasonic generating unit 3 in working positions. Figure 2 is a schematic diagram of the cleaning tank 1 and the ultrasonic generating unit 3 in the storage position.

The ultrasonic cleaning device also includes a connecting component (not shown in the figure).

The connection component is connected between the fixed structure 7 and the base 6 so that the base 6 can move back and forth relative to the fixed structure 7 and switch back and forth between the storage position and the working position.

Further, the ultrasonic wave generating unit 3 includes a connection structure 31 and the ultrasonic wave generating module 32 .

One end of the connection structure 31 is disposed on the base 6 and is located outside the second channel 112 . The other end of the connecting structure 31 extends upward and then extends upward toward the washing tub 12 . The ultrasonic wave generating module 32 is disposed on the opposite side of the connecting structure 31 and the washing tub 12 .

The water baffle 53 is located below the other end of the liquid inlet pipe. The liquid outlet 21 at the lower end of the liquid inlet pipe and the lower end of the probe 41 are respectively located on both sides of the water barrier 53 .

When the clothes need to be partially cleaned, the liquid feeding unit 2 feeds liquid into the cleaning tank 1, and stops feeding liquid after reaching the preset liquid level. The user places part of the clothes in the washing tub 12 , the bottom of the clothes is in contact with the washing water, and the upper part of the clothes is in contact with the ultrasonic wave generating unit 3 , or the upper part of the clothes is close to the ultrasonic wave generating unit 3 . The ultrasonic wave generating unit 3 generates ultrasonic waves to clean parts of the clothes or articles.

The washing machine includes a tray base. The tray seat is provided with a clothes putting opening. The clothes putting opening is provided with an installation opening, and the ultrasonic cleaning device is installed in the installation opening.

The tray base is provided with an accommodating space connected to the installation opening on the clothes discharge port, and the ultrasonic cleaning device is movably installed in the accommodating space inside the tray base.

The fixing structure 7 is fixed on the inner wall of the tray seat. The liquid inlet pipe extends from the fixed structure 7 to the installation port. The base 6 can move reciprocally in and out of the installation opening.

Preferably, the installation opening is provided at the rear end of the clothes putting opening.

One end (i.e., the front end) of the base 6 extends inward into the inside of the clothes putting opening during operation, and the other end (i.e., the rear end) of the base 6 is disposed in the installation opening. The connecting portion is provided on the right outer wall of the base 6 . The guide groove 11 is provided close to the right side of the base 6 .

Preferably, the base 6 is a rectangular parallelepiped.

The above 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 in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent embodiments using the technical content suggested above, and the implementations in the above embodiments can also be further combined or replaced. Without departing from the content of the technical solution of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention.

Claims

An ultrasonic cleaning device, characterized by: including,

Washing tank, used to hold washing water;

Liquid feeding unit is used to feed liquid into the cleaning tank;

A liquid level detection unit is used to detect the liquid level in the cleaning tank; the detection end of the liquid level detection unit extends into the cleaning tank;

A water-blocking structure is provided in the cleaning tank to prevent liquid from the liquid inlet unit from impacting the detection end of the liquid level detection unit.
An ultrasonic cleaning device according to claim 1, characterized in that:

The water blocking structure is arranged between the position where the liquid inlet unit injects liquid into the cleaning tank and the position where the detection end of the liquid level detection unit is in the cleaning tank.
An ultrasonic cleaning device according to claim 2, characterized in that: the cleaning tank includes:

Sink for washing laundry;

A guide tank, one end of which is connected to the washing tank, is used to inlet liquid and guide the incoming liquid flow to the washing tank;

The detection end of the liquid level detection unit extends into the guide groove, and the water blocking structure is provided in the guide groove.
An ultrasonic cleaning device according to claim 3, characterized in that: the water blocking structure extends from the other end of the guide groove to the end where the guide groove and the washing tank are connected;

Both sides of the water retaining structure form a first channel and a second channel respectively with the guide groove, the liquid inlet unit injects liquid into the first channel, and the detection end of the liquid level detection unit extends to the Second channel middle;

The cleaning tank has a first water path, which enters the washing tank from the guide tank under the guidance of the first channel, circulates, and flows to the detection of the liquid level detection unit under the guidance of the second channel. end position.
An ultrasonic cleaning device according to claim 4, characterized in that: the water retaining structure includes:

A water-blocking boss is protrudingly provided in the guide groove and extends from the other end of the guide groove to one end where the guide groove communicates with the washing tank.
An ultrasonic cleaning device according to claim 5, characterized in that:

A gap is provided on the water-blocking boss, and the gap is provided on both sides of the water-blocking boss and is connected to the first channel and the second channel respectively;

The cleaning tank has a second water channel that flows from the first channel through the gap, flows into the second channel, and mixes with the first water channel entering the second channel.
An ultrasonic cleaning device according to any one of claims 5-6, characterized in that:

The water retaining structure also includes a water retaining plate extending upward and disposed on the water retaining boss, located at the position where the liquid inlet unit injects liquid into the cleaning tank and the detection end of the liquid level detection unit is in the cleaning tank. between positions.
An ultrasonic cleaning device according to any one of claims 4 to 7, characterized in that: it further includes a base, the washing tank is arranged on one end of the base, and the guide groove extends from the washing tank to the The other end of the base is extended;

The first channel is disposed close to an outer wall between two ends of the base.
An ultrasonic cleaning device according to claim 8, characterized in that: the liquid inlet unit includes a liquid inlet pipe extending above the guide groove; the liquid inlet pipe is provided with a liquid outlet to the Set downward toward the first channel;

The liquid level detection unit includes a probe, the lower end of which extends into the second channel.
A washing machine, characterized by having the ultrasonic cleaning device described in any one of claims 1-9.