CN112853670B

CN112853670B - Washing machine

Info

Publication number: CN112853670B
Application number: CN201911175805.9A
Authority: CN
Inventors: 陈贺; 刘振华; 许运九; 董彦磊; 毕波
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2023-04-07
Anticipated expiration: 2039-11-26
Also published as: CN112853670A

Abstract

The invention relates to the field of washing machines, in particular to a washing machine.A steam generation assembly arranged in the washing machine comprises a heating cavity and an ultrasonic atomization cavity, a heating plate heats liquid flow contained in the heating cavity to form hot steam, an ultrasonic generator heats the liquid flow contained in the ultrasonic atomization cavity to form water mist, the hot steam flows into the ultrasonic atomization cavity from the heating cavity and is mixed with the water mist to form steam, and the steam is conveyed into an inner barrel to realize steam washing of clothes.

Description

Washing machine

Technical Field

The invention relates to the technical field of washing machines, in particular to a washing machine.

Background

In order to improve the sterilization and deodorization functions of washing machines and to solve the problem of wrinkles generated during drying, washing machines having a steam washing function have been developed.

The washing machine with steam function that the prior art has already disclosed, its scheme adopted is to wash (dry) and spray the steam of certain temperature in the barrel, realize the function of ironing sterilizing and drying, this kind needs to set up the steam generating device between outer tub and the water intake device, and realize the steam generating function of the steam generating device, the steam generating device needs to set up the structure such as water containing box, heating plate and fixed part, level sensor, temperature controller usually; the water is heated by the heating plate until the water is boiled to generate steam, the steam enters the guide pipe connected with the washing barrel and is cooled, and then the steam is sprayed into the inner barrel to wash the clothes.

The inventor finds that the steam generation effect of the existing product is limited in lifting space and accompanied with a large amount of condensed water flowing out, so that the whole function of the washing machine is influenced; meanwhile, because the high water consumption of the high-power heating plate is high, the volume of a water containing box of the steam generator is required to be increased if the same steam spraying time is required to be maintained, the steam washing effect cannot be further improved due to the fact that the internal space of the washing machine is limited and the volume of the water containing box is limited.

Disclosure of Invention

The invention provides a washing machine, which is used for solving the problems that the washing machine with a steam washing function has high energy consumption and the improvement of a steam washing effect is limited.

To achieve the above object, an embodiment of the present invention provides a washing machine including: the water inlet is arranged in the shell; an outer tub disposed in the cabinet and accommodating washing water supplied from the water inlet through a pipe; an inner tub rotatably disposed in the outer tub and accommodating laundry; the steam generating assembly is arranged in the shell and comprises a base, a top cover, a heating plate and an ultrasonic generator; the top cover is connected with the base and jointly enclosed to form a generating cavity; the base is divided into a heating cavity and an ultrasonic atomization cavity by a partition plate arranged in the base, the heating plate is arranged in the heating cavity, and the ultrasonic generator is arranged in the ultrasonic atomization cavity; a liquid feeding flow passage is arranged on the partition plate, and two ends of the liquid feeding flow passage are respectively communicated with the heating cavity and the ultrasonic atomization cavity; liquid flow is conveyed into the heating cavity through the water supply port, and when the liquid flow in the heating cavity reaches a certain height, the liquid flow flows into the ultrasonic atomization cavity through the liquid conveying flow channel; heating the liquid stream contained in the heating chamber by the heating plate to form hot vapor; exciting, by the ultrasonic generator, a liquid stream contained within the ultrasonic atomization chamber to form a water mist; hot steam enters the ultrasonic atomization cavity through the air supply flow channel, is mixed with water mist and then is sent out from the air outlet; the ultrasonic atomization cavity is internally provided with an overflow hole, and the overflow hole limits that liquid flow contained in the ultrasonic atomization cavity is not higher than a preset water level.

Further, the depth dimension of the heating cavity in the vertical direction of the base is smaller than the depth dimension of the ultrasonic atomization cavity in the vertical direction of the base.

Further, the depth of the overflow hole in the ultrasonic atomization cavity is larger than the depth of the heating cavity in the vertical direction of the base, and the overflow hole is located between the bottom surface of the heating cavity and the bottom surface of the ultrasonic atomization cavity.

Further, the overflow hole is connected with a drain hole arranged in the machine shell through a pipeline.

Furthermore, a through groove is formed in the base, and the heating plate is connected into the through groove.

Furthermore, a sealing ring is arranged at the joint of the base and the top cover.

Furthermore, the base is fixedly connected in the casing through a support frame.

Furthermore, set up water supply port and steam outlet on the overhead cover, the water supply port with the water supply unit links to each other through the guide tube, the steam outlet via the guide tube communicate in the inner tube.

Further, the heating plate is a serpentine coil.

Compared with the related art, the technical scheme provided by the application has the beneficial effects that: the steam generation subassembly that sets up in the washing machine includes heating chamber and ultrasonic atomization chamber, will hold the liquid stream in the heating chamber by the heating plate and heat in order to form hot steam, will hold the liquid stream in the ultrasonic atomization intracavity by ultrasonic generator and heat in order to form water smoke, hot steam flows to ultrasonic atomization intracavity and forms steam and carry to the inner tube with water smoke mixture by the heating chamber, in order to realize the steam washing to the clothing, it can guarantee to be located the liquid stream maintenance of ultrasonic atomization intracavity at preset water level height to set up the spillway hole in ultrasonic atomization intracavity, prevent that the liquid stream water level is too high and lead to ultrasonic generator's work load too big, reduce water smoke formation volume, furthermore, the liquid stream flows through heating chamber and ultrasonic atomization chamber respectively, by the water level height in the spillway hole control ultrasonic atomization intracavity, need not to be equipped with specific water level sensor, and the production cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view illustrating an overall structure of a steam washing machine according to an embodiment of the present application;

FIG. 2 is an exploded view of a steam generating assembly according to an embodiment of the present disclosure;

FIG. 3 is a perspective view of a base provided by an embodiment of the present application;

FIG. 4 is a perspective view of a steam generation assembly according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a steam generation assembly provided by an embodiment of the present application;

FIG. 6 is a cross-sectional view taken along direction A of FIG. 5 according to an embodiment of the present application;

fig. 7 is a cross-sectional view taken along the direction a in fig. 5 according to an embodiment of the present application.

In the figure:

1-a machine shell;

11-a water supply unit 11;

100-outer cylinder;

200-inner cylinder;

300-steam generating assembly, 310-base, 320-top cover, 330-heating disc, 340-ultrasonic generator, 370-sealing ring;

310 a-a heating chamber;

310 b-ultrasonic atomization chamber;

321-water supply port, 322-steam outlet port, 323-baffle;

311-a separator;

312-lumen wall;

313-overflow;

3121-air inlet guide plate, 3122-air outlet guide plate, 3123-water inlet and 3124-air outlet;

350-liquid feeding flow channel;

360-air supply flow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Steam washing machines are more and more accepted by consumers because of having the functions of smoothing wrinkles, sterilizing and disinfecting. At present, the steam washing machine is realized by heating a water source through an independent steam heating module to generate steam, and then guiding a generated steamer into a washing inner barrel through a guide pipe.

As shown in fig. 1 to 7, there are shown perspective views illustrating an overall structure of a steam washing machine according to an embodiment of the present application; FIG. 2 is an exploded view of a steam generating assembly 300 according to an embodiment of the present disclosure; FIG. 3 is a perspective view of a base 310 provided in an embodiment of the present application; FIG. 4 is a perspective view of a steam generating assembly 300 according to an embodiment of the present disclosure; FIG. 5 is a schematic cross-sectional view of a steam generation assembly 300 according to an embodiment of the present application; FIG. 6 is a cross-sectional view taken along direction A of FIG. 5 according to an embodiment of the present application; fig. 7 is a cross-sectional view taken along the direction a in fig. 5 according to an embodiment of the present application.

As shown in fig. 1 to 7, the present application provides a steam washing machine including

A cabinet 1, the cabinet 1 forming an external shape, the interior of which is provided with a water supply unit 11 connected with an externally provided water source;

an outer tub 100 disposed in the cabinet 1 and accommodating washing water supplied from the water supply unit 11 through a guide pipe;

an inner tub 200, the inner tub 200 being rotatably provided in the outer tub 100 and accommodating laundry;

a steam generation assembly 300 disposed in the cabinet 1, including a water supply port 321 connected to the water supply unit 11, and a steam outlet 322 connected to the inner tub 200;

a driving unit disposed at a rear side of the outer tub 100 for rotating the inner tub 200. The driving unit is connected to the driving shaft at the rear side of the inner cylinder 200 through the outer cylinder 100 to be connected with the inner cylinder 200, and receives an instruction to drive the inner cylinder 200 to rotate;

and lifters disposed at a circumference of the drum 200, and when the drum 200 rotates, the lifters lift the laundry and achieve a certain physical drop to release the laundry so as to be beaten, thereby realizing washing of the laundry.

Wherein,

the steam generating assembly 300 includes a base 310, a top cover 320, a heating plate 330, and an ultrasonic generator 340;

the top cover 320 is connected with the base 310 and jointly encloses to form a generating cavity;

a partition 311 disposed in the base 310 divides the base 310 into a heating chamber 310a and an ultrasonic atomization chamber 310b, a heating plate 330 is disposed in the heating chamber 310a, and an ultrasonic generator 340 is disposed in the ultrasonic atomization chamber 310b;

the partition 311 is provided with a liquid feeding channel 350 and a gas feeding channel 360, and two ends of the liquid feeding channel 350 and the gas feeding channel 360 are respectively communicated with the heating cavity 310a and the ultrasonic atomization cavity 310b;

the liquid flow is delivered into the heating cavity 310a through the water supply unit 11, and when the liquid flow in the heating cavity 310a reaches a certain height, the liquid flow flows into the ultrasonic atomization cavity 310b through the liquid delivery channel 350;

the flow of liquid contained in the heating chamber 310a is heated by the heating plate 330 to form hot vapor;

the steam generator excites the liquid flow contained in the ultrasonic atomization chamber 310b to form water mist;

the hot steam enters the ultrasonic atomizing chamber 310b through the air feeding channel 360, mixes with the water mist, and is fed out through the air outlet 322.

As shown in fig. 1, the steam generating unit is mounted on the housing, preferably in a space near the water supply unit 11, by a support bracket, and is disposed at an upper portion of the tub 100 to facilitate disassembly for maintenance. Through the mounting means who is close to water supply unit 11, the route that outside water source got into steam generation module as washing water is favorable to shortening, when making steam generation module produce steam lack of water, the water source is by the supply of very fast, avoids steam generation unit to cause wherein part to damage because of anhydrous operating time is longer.

As shown in fig. 2, the steam generating unit is composed of an upper cover and a lower cover which are connected into a whole by screws, and the upper cover and the lower cover are buckled and connected to form a heating cavity 310a and an ultrasonic atomization cavity 310b which are communicated with each other inside; in order to maintain the sealing performance of the heating cavity 310a and the ultrasonic atomization cavity 310b, a sealing strip is further disposed between the upper cover and the lower cover, and the sealing strip is preferably made of a material with good temperature resistance, such as rubber, so as to prevent the material of the sealing strip from being failed due to high-temperature steam generated inside the heating cavity 310a, and the sealing performance of the steam generation unit is required to be maintained well.

Wherein the side of the upper cover is formed with a water supply port 321 communicated with the heating cavity 310a for flowing an external water source into the heating cavity 310a through a guide pipe, and a steam outlet 322 communicated with the ultrasonic atomization cavity 310b for guiding high-temperature water vapor mixed by the flowing of the heating cavity 310a into the ultrasonic atomization cavity 310b into the guide pipe, and further flows into the washing inner barrel 200 through the injection of the guide pipe.

As shown in fig. 3, which is a perspective view of the steam generating unit, the lower cover forms most of the space of the heating chamber 310a and the ultrasonic atomization chamber 310 b:

wherein, heating chamber 310a designs for having the less space cavity of degree of depth, is provided with logical groove on the base 310 of heating chamber 310a bottom, leads to the inslot and installs heating plate 330, and heating plate 330 bottom is owing to leak outward, leads to the scald in order to prevent to be used for touching heating plate 330 by mistake when the operation, and heating plate 330 bottom increases heating plate 330 baffle 311, and heating plate 330 baffle 311 passes through the more stable connection of screw, prevents that the washing machine in the use vibrations from leading to droing.

As shown in fig. 2, in order to maintain the sealing performance of the heating cavity 310a, a sealing ring 370 is installed between the heating plate 330 and the lower cover, and the sealing ring is preferably made of a material with better temperature resistance, such as rubber, so as to prevent the material of the sealing ring from being failed due to the high-temperature steam generated inside the heating cavity 310a, and the sealing performance of the steam generation unit is required to be maintained better.

The ultrasonic atomization cavity 310b is designed to be a deep space cavity, an atomization cavity and a water channel cavity are defined in the cavity, the atomization cavity is separated by the water channel cavity of the annular baffle 323, and the atomization cavity and the water channel cavity are communicated through a water flowing hole at the bottom of the annular baffle 323, so that water supply in the atomization cavity is guaranteed.

Through the design that the depth dimension of the heating cavity 310a in the vertical direction of the base 310 is smaller than the depth dimension of the ultrasonic atomization cavity 310b in the vertical direction of the base 310, the preferential functional characteristics of the respective cavities are considered, and more importantly, the design is favorable for leading the water source led in by the steam generation assembly 300 to the ultrasonic atomization cavity 310b through the water supply port 321 and the heating cavity 310a in sequence, so that the whole steam generation assembly 300 only needs to design one water supply port 321, namely, the water source supply of the two cavities is realized.

Wherein, an ultrasonic generator is arranged at the bottom of the atomizing cavity and is used for fully contacting with a water source to generate water mist during working.

In the water source atomization process, the ultrasonic generator 340 is connected with an ultrasonic transducer, the ultrasonic generator 340 sends a high-frequency oscillation signal, the high-frequency oscillation signal is converted into high-frequency mechanical oscillation through the ultrasonic transducer and is transmitted into water, the high-frequency mechanical oscillation is radiated around the density interphase in the water, so that the water flows to generate tens of thousands of micro-bubbles, and the micro-bubbles float up to the surface of the water source and form water mist mixed with steam through a large amount of gathering due to the extremely small size of the micro-bubbles.

In the process, the supply amount of the micro-bubbles is related to the supply and the depth of the water source, and when the depth of the water source is deeper, the deep water source brings larger water pressure due to the generation and the bottom of the micro-bubbles, so that the micro-bubbles are not favorably floated, and the formation of water mist is not favorably realized.

Because the water source for generating the water mist needs to be supplied continuously, and the depth of the water source needs to be kept within a certain range, the overflow hole 313 is arranged in the ultrasonic atomization chamber 310b, and the overflow hole 313 limits the liquid flow contained in the ultrasonic atomization chamber 310b not to be higher than the preset water level.

Because the heating chamber 310a is communicated with the ultrasonic atomizing chamber 310b through the liquid feeding channel 350 (as shown in fig. 6), and the liquid feeding channel 350 is located at the bottom of the steam generating portion, the water flowing into the ultrasonic atomizing device can be preheated in advance by installing the heating plate 330 on the lower surface of the steam generating device, so as to increase the temperature of the steam after the steam is mixed with the water mist, and improve the steam washing effect.

In addition, the depth of the overflow hole 313 in the ultrasonic atomization cavity 310b is greater than the depth of the heating cavity 310a in the vertical direction of the base 310, and the overflow hole 313 is located between the bottom of the heating cavity 310a and the bottom of the ultrasonic atomization cavity 310b, so that the liquid flow water level in the ultrasonic atomization cavity 310b can be kept within a certain range, that is, not higher than the preset water level, and the overflow hole 313 is arranged between the bottom of the heating cavity 310a and the ultrasonic atomization cavity 310b, which is beneficial to ensuring that the water level in the heating cavity 310a is controlled within a certain range and the continuous supply of the liquid flow water source in the ultrasonic atomization cavity 310 b.

Further, the overflow hole 313 is provided with a drainage unit inside the casing 1, and the overflow hole 313 is connected with the drainage unit inside the casing 1 through a guide pipe, and the overflow pipe may be connected to an outer tub and a soap box to drain and collect overflow water.

According to the steam washing machine provided by the embodiment of the application, the traditional washing mode through physical fall and beating is optionally reserved, the steam generation module is additionally arranged on the basis, high-temperature steam generated by the steam generation module is drained and sprayed into the washing inner barrel 200, the washing degree of clothes is greatly improved, the function of ironing clothes wrinkles is achieved, and more importantly, the washing machine clothes washing function applied to the sterilizing effect of the high-temperature steam is used for obtaining clean and sanitary washing clothes.

A steam washing machine according to an embodiment of the present application, as shown in fig. 2 to 7, includes a steam generating assembly 300 including a heating chamber 310a and an ultrasonic atomizing chamber 310b through which water flows in sequence, the water flows into the heating chamber 310a through a water supply inlet 321, and a low-power heating plate 330 is installed in a steam generating device for generating high-temperature steam; an ultrasonic generator 340 is arranged in the ultrasonic atomization cavity 310b and is used for acting on water to generate a large amount of water mist;

the water vapor generated in the heating cavity 310a enters the ultrasonic atomization device through the air supply flow channel 360 (as shown in fig. 7), and the water vapor mixed with the water vapor and forming high temperature enters the inner barrel 200 through the guide tube from the door seal.

Wherein the heating plate 330 is preferably a serpentine coil and is laid on the bottom surface of the heating cavity 310a, which can effectively increase the contact area of water with the heating plate 330 and increase the speed of the heating plate 330 generating high-temperature steam, thereby reducing the operation time of the steam generation module and increasing the steam washing efficiency of the washing machine.

An inner cavity wall 312 is arranged in the ultrasonic atomization cavity 310b, the inner cavity wall 312 is arranged in the ultrasonic atomization cavity 310b along the vertical direction, the inner cavity wall 312 is communicated with the ultrasonic atomization cavity 310b, an ultrasonic action cavity is formed by the inner cavity wall 312 in the ultrasonic atomization cavity 310b in a surrounding mode, liquid flow excited by the steam generator is limited in the ultrasonic action cavity, and the ultrasonic generator 340 is located in the ultrasonic action cavity.

An air inlet guide plate 3121 is arranged between the inner cavity wall 312 and the partition 311, an air outlet guide plate 3122 is arranged between the inner cavity wall 312 and the side wall of the base 310, the air inlet guide plate 3121 and the air outlet guide plate 3122 are arranged in the ultrasonic atomization cavity 310b along the vertical direction, and the air inlet guide plate 3121 is arranged in the air supply flow passage 360.

The bottom of the air outlet guide plate 3122 is provided with a water inlet 3123, which enters the ultrasonic atomization cavity 310b through the liquid feeding channel 350, and flows into the ultrasonic action cavity through the water inlet 3123.

An air bleed port 3124 is provided between the air intake guide plate 3121 and the inner cavity wall 312, and the hot steam is delivered into the ultrasonic action cavity through the air bleed port 3124.

The air outlet guide plate 3122 corresponds to the air outlet 322, so that the hot steam and the water mist are mixed and then sent out from the air outlet 322 under the guidance of the air outlet guide plate 3122.

As shown in fig. 7, a baffle 323 is provided on the top cover 320, and the hot steam moves into the ultrasonic atomization chamber 310b in a direction toward the base 310 under the guidance of the baffle 323. The baffle 323 is vertically disposed on the top cover 320, and the baffle 323 is disposed to extend in a direction toward the base 310.

An inner cavity wall 312 is arranged in the ultrasonic atomization cavity 310b, the inner cavity wall 312 is arranged in the ultrasonic atomization cavity 310b along the vertical direction, the inner cavity wall 312 is communicated with the ultrasonic atomization cavity 310b, an ultrasonic action cavity is formed in the ultrasonic atomization cavity 310b by the inner cavity wall 312 in a surrounding mode, and liquid flow excited by the steam generator is limited in the ultrasonic action cavity.

The inner cavity wall 312 is provided with a notch which is communicated with the air supply port 3124, the baffle 323 is positioned above the notch, and the hot steam flows into the ultrasonic action cavity through the notch positioned below the baffle 323 under the guidance of the baffle 323. In order to enable the hot steam to be delivered into the ultrasonic atomization chamber 310b without leakage through the gap, the end of the baffle 323 may abut against the end surface of the inner chamber wall 312 when the top cover 320 is coupled to the base 310.

The specific working process and working principle are as follows: when the water levels of the heating cavity 310a and the ultrasonic atomization cavity 310b reach preset water levels, the heating cavity 310a starts to heat, water in the existing steam chamber starts to boil and generate steam (different along with the inlet water temperature, and the calculation test is carried out according to 20 ℃) after the calculation experiment in about 90 seconds, at the moment, the ultrasonic atomization cavity 310b starts to generate ultrasonic atomization, due to the cavitation effect of ultrasonic waves, an atomization generating position needs to be reserved above the water surface between the ultrasonic waves and the water surface, a large amount of water mist is generated after atomization and floats on the water surface, but the water mist generated by the ultrasonic atomization cannot be ejected independently under the condition of no external power, at the moment, high-temperature high-pressure hot steam is generated in the steam chamber, the pressure of the hot steam is greater than the pressure of the water mist in the ultrasonic atomization cavity 310b, the hot steam enters a pipeline of the ultrasonic atomization cavity 310b, and the mist generated in the ultrasonic cavity is mixed together and ejected together with the venturi effect; in the process again, the water mist generated by the ultrasonic atomization chamber 310b is heated by the steam generated by the heating chamber 310a, and the amount of the mixed steam is greatly increased.

Wherein, be provided with level sensor in ultrasonic atomization chamber 310b for water level detection stops intaking and begins the overflow when the water level reachs first predetermined water level, and the heater stops the heating when the water level is less than the second predetermined water level, stops ultrasonic generator 340 work, protection heating plate 330 and ultrasonic generator 340.

Because the power of the ultrasonic atomizer is very small (about 12W-24W), the energy consumption during steam generation is greatly reduced, and meanwhile, the atomization amount is very large, the spraying and penetrating effect of the steam on the clothes is improved, and the improvement of the steam cleaning function and the wrinkle removing and ironing function of the clothes is facilitated in the aspects of dissolving stains and improving cleaning.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A washing machine, characterized by comprising: the water supply device comprises a machine shell, a water supply unit and a water supply unit, wherein the machine shell forms the appearance, and the water supply unit is arranged in the machine shell; an outer tub disposed in the cabinet and accommodating washing water supplied from the water supply unit through a guide pipe; an inner tub rotatably provided in the outer tub and accommodating laundry; the steam generating assembly is arranged in the shell and comprises a water supply port connected with the water supply unit and a steam outlet connected with the inner barrel; the steam generating assembly is characterized by comprising a base, a top cover, a heating plate and an ultrasonic generator; the top cover is connected with the base and jointly enclosed to form a generating cavity; the base is divided into a heating cavity and an ultrasonic atomization cavity by a partition plate arranged in the base, the heating plate is arranged in the heating cavity, and the ultrasonic generator is arranged in the ultrasonic atomization cavity; a liquid feeding flow channel and an air feeding flow channel are arranged on the partition plate, and two ends of the liquid feeding flow channel and the air feeding flow channel are respectively communicated with the heating cavity and the ultrasonic atomization cavity; liquid flow is conveyed into the heating cavity through the water supply unit, and when the liquid flow in the heating cavity reaches a certain height, the liquid flow flows into the ultrasonic atomization cavity through the liquid conveying flow channel; heating the liquid stream contained in the heating chamber by the heating plate to form hot vapor; exciting, by the steam generator, a liquid flow contained in the ultrasonic atomization chamber to form a water mist; hot steam enters the ultrasonic atomization cavity through the air supply flow channel, is mixed with water mist and then is sent out through the steam outlet; set up the spillway hole in the ultrasonic atomization intracavity, by the spillway hole restriction hold in the liquid stream in the ultrasonic atomization intracavity is not higher than and predetermines water level height, the spillway hole is in depth dimension in the ultrasonic atomization intracavity is greater than the heating chamber is in the ascending depth dimension of the vertical side of base, the spillway hole is located the bottom surface of heating chamber with between the bottom surface of ultrasonic atomization chamber, be provided with level sensor in the ultrasonic atomization intracavity, when the water level reachs first predetermineeing the water level stop to intake and pass through the spillway hole begins the overflow, when the water level is less than the second predetermines the water level the heating plate stops to heat.

2. The washing machine as claimed in claim 1, wherein a depth dimension of the heating chamber in a vertical direction of the base is smaller than a depth dimension of the ultrasonic atomization chamber in a vertical direction of the base.

3. The washing machine as claimed in claim 1, wherein a drain unit is provided in the cabinet, and the overflow hole is connected to the drain unit provided in the cabinet through a guide pipe.

4. A washing machine as claimed in claim 1 wherein a through slot is provided in the base and the heating plate is connected within the through slot.

5. A washing machine as claimed in claim 1 wherein a gasket is provided at the junction of the base and the top cover.

6. A washing machine as claimed in claim 1 wherein the base is fixedly connected within the cabinet by a support bracket.

7. The washing machine as claimed in claim 1, wherein a water supply port and a steam outlet port are provided on the top cover, the water supply port is connected to the water supply unit through a guide pipe, and the steam outlet port is communicated with the inner tub through a guide pipe.

8. A washing machine as claimed in claim 1 wherein the heating plate is a serpentine coil.