Dish washing machine and control method thereof

Abstract

The invention discloses a dish-washing machine and a control method thereof, the dish-washing machine comprises an inner container, a shelf and a steam output assembly, the shelf is arranged in the inner container and used for placing tableware to be washed, the steam output assembly is installed in the inner container, and at least part of the steam output assembly is arranged on the shelf and used for spraying steam to the tableware to be washed. According to the invention, at least part of the steam output assembly is arranged on the shelf, so that at least part of the steam output by the steam output assembly can be accurately and directly sprayed to the surface of the tableware to be washed, the cleaning effect of the tableware to be washed is enhanced, the situation that the steam is lost in air is avoided, and the utilization rate of the steam is improved.

Description

Technical Field

[0001] This invention belongs to the field of dishwasher technology, specifically, it relates to a dishwasher and a method for controlling the dishwasher. Background Technology

[0002] As people's living standards improve, their demands for quality of life are increasing, leading to the gradual recognition and acceptance of dishwashers. To improve washing efficiency, dishwashers use high-temperature steam to pre-wet contaminants on the surface of tableware before washing. Additionally, high-temperature steam can be used for sterilization after washing.

[0003] Chinese Patent Application No. 201611245699.3 discloses a dishwasher, including an inner tub and a steam washing system. The steam washing system includes a steam generator and a steam nozzle assembly. The steam nozzle assembly is connected to the steam generator through a steam hose, and steam is sprayed into the inner tub through the nozzles of the steam nozzle assembly.

[0004] In the above technical solution, the steam nozzle assembly is installed in the inner liner. When the steam nozzle assembly sprays steam, the steam diffuses in the inner liner. Most of the steam cannot immediately act on the tableware, resulting in a reduction in the utilization rate of steam and affecting the cleaning effect of the tableware.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. The primary objective is to provide a dishwasher in which a first steam injection unit is mounted on a shelf to ensure that the steam output by the first steam injection unit can be accurately and directly sprayed onto the surface of the dishes to be washed, thereby enhancing the cleaning effect of the dishes, preventing the steam from being lost in the air, and improving the utilization rate of the steam.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0008] A dishwasher, comprising,

[0009] Inner liner;

[0010] A shelf, located in the inner liner, is used to place tableware to be washed;

[0011] A steam output assembly, which is installed in the inner liner;

[0012] At least a portion of the steam output assembly is located on the shelf for spraying steam onto the dishes to be washed.

[0013] Preferably, the steam output assembly includes a first steam injection unit, which is located at the bottom of the shelf;

[0014] Preferably, the first steam injection unit is located between the shelf and the tableware to be washed.

[0015] Preferably, the first projection generated downward by the first steam injection unit at least partially overlaps with the second projection generated downward by the tableware to be washed;

[0016] Preferably, the first projection covers the second projection.

[0017] Preferably, the first steam injection unit has jet holes, and at least a portion of the jet holes inject steam upwards;

[0018] Preferably, there are multiple air jet holes, evenly spaced apart;

[0019] More preferably, the spray range of the jet hole substantially covers the tableware to be washed;

[0020] Preferably, a first steam nozzle is installed on the jet hole.

[0021] Preferably, the steam output assembly includes,

[0022] The second steam injection unit is located above the shelf and is used to inject steam downwards;

[0023] Preferably, the second steam injection unit is installed on the top wall of the inner liner;

[0024] Preferably, the second steam injection unit is rotatably configured.

[0025] Preferably, the dishwasher includes,

[0026] A first delivery pipeline, the output end of which passes through the shelf and is connected to the first steam injection unit, is capable of delivering steam to the first steam injection unit;

[0027] Preferably, the dishwasher includes a second delivery pipe, the output end of which is connected to the second steam injection unit, and the second delivery pipe is capable of delivering steam to the second steam injection unit;

[0028] Preferably, the dishwasher includes a third delivery pipe and an auxiliary unit disposed on the third delivery pipe, the third delivery pipe being connected to the first delivery pipe and the second delivery pipe, and the auxiliary unit being used to pressurize the steam passing through the first delivery pipe and / or the first delivery pipe;

[0029] Preferably, the dishwasher includes a valve assembly, the valve assembly including a switching valve for controlling the connection and disconnection of the third delivery line with at least one of the first delivery line and the second delivery line.

[0030] The present invention also provides a method for controlling a dishwasher, comprising,

[0031] Start the cleaning process;

[0032] Control at least a portion of the steam output assembly to spray steam onto the dishes to be washed placed on the shelf.

[0033] Preferably, after the steam injection ends and / or before the steam injection begins, it further includes,

[0034] Control the dishwasher to perform the spraying operation;

[0035] Once the spraying operation meets the preset conditions, the cleaning process ends.

[0036] Preferably, before controlling at least a portion of the steam output assembly to spray steam onto the dishes to be washed placed on the shelf, the process includes:

[0037] The control switching valve connects the third delivery pipeline to at least one of the first and second delivery pipelines.

[0038] Preferably, controlling at least a portion of the steam output assembly to spray steam onto the dishes to be washed placed on the shelf includes,

[0039] Obtain the soiling parameters of the tableware to be washed;

[0040] Determine whether the value of the dirt parameter is greater than a set threshold. If yes, control the steam output component to spray steam onto the dishes to be washed on the shelf. If no, control part of the steam output component to spray steam onto the dishes to be washed on the shelf.

[0041] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0042] In this invention, at least a portion of the steam output components are disposed on the shelf, ensuring that the steam output by the steam output components can be accurately and directly sprayed onto the surface of the tableware to be washed, thereby enhancing the cleaning effect of the tableware, preventing the steam from being lost in the air, and improving the utilization rate of the steam.

[0043] In this invention, the first projection generated downward by the first steam injection unit covers the second projection generated downward by the tableware to be washed, which ensures that the steam output by the first steam injection unit fully covers the tableware to be washed, and ensures that all parts of the tableware to be washed can fully contact the steam, thereby improving the cleaning effect of the tableware to be washed.

[0044] In this invention, the jet holes on the first steam jet unit spray steam upwards in at least some of them. As the steam flows upwards, it is distributed on the surface of the tableware to be washed, making full contact with the tableware and improving the cleaning effect.

[0045] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0046] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0047] Figure 1 This is a schematic diagram of the structure of the dishwasher of the present invention;

[0048] Figure 2 This is a flowchart illustrating one embodiment of the dishwasher control method of the present invention;

[0049] Figure 3 This is a flowchart illustrating another embodiment of the dishwasher control method of the present invention;

[0050] Figure 4 This is a flowchart of another embodiment of the dishwasher control method of the present invention.

[0051] In the diagram: 1. Housing; 2. Shelf; 3. Steam output assembly; 31. First steam injection unit; 311. Jet nozzle; 312. First steam nozzle; 313. First housing; 314. First air inlet; 32. Second steam injection unit; 321. Rotating arm; 322. Second steam nozzle; 41. Fourth delivery pipeline; 42. Second delivery pipeline; 43. First delivery pipeline; 44. Third delivery pipeline; 5. Auxiliary unit; 6. Valve assembly; 61. Switching valve; 62. Check valve; 7. Water tank; 8. Steam generator; 9. Water pump.

[0052] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0053] To make the objectives, 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 accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0054] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] like Figure 1 As shown, the present invention provides a dishwasher, which includes a housing 1, an inner tub, a shelf 2, and a steam output assembly 3.

[0057] Specifically, the housing 1 forms the appearance of the dishwasher, the inner tub is disposed in the housing 1 and has a washing chamber, the shelf 2 is disposed in the washing chamber and is used to place the dishes to be washed, the steam output component 3 is installed in the inner tub and at least part of the steam output component 3 is disposed on the shelf 2 for spraying steam onto the dishes to be washed.

[0058] In this invention, at least a portion of the steam output component 3 is disposed on the shelf 2, ensuring that the steam output by the steam output component 3 can be accurately and directly sprayed onto the surface of the tableware to be washed, increasing the surface temperature of the tableware, softening high-viscosity oil stains on the tableware quickly and making them easier to clean, further improving the cleaning effect of the tableware and enhancing the user experience. This also prevents steam from dissipating into the air, improving steam utilization. It is understood that the steam output component 3 can be engaged with the shelf 2 via clips. When the user wants to remove the shelf 2, they first need to release the clips between the steam output component 3 and the shelf 2, that is, detach the steam output component 3 from the shelf 2.

[0059] Specifically, existing steam output modules are usually located at the top or side of the inner tank. When these modules spray steam, because steam is less dense than air, it moves towards the top of the inner tank. Since the dishes to be washed are usually placed at the bottom, the steam just sprayed from the existing modules is not very effective at cleaning the dishes. This further reduces the utilization rate of the steam. Only when the steam at the top of the inner tank reaches saturation will the steam move towards the bottom. The steam located at the bottom and middle of the inner tank then further cleans the dishes.

[0060] The steam output component 3 includes a first steam injection unit 31, which is disposed on the shelf 2 and is used to inject steam onto the tableware to be washed.

[0061] Preferably, the first steam injection unit 31 is located at the bottom of the shelf 2; that is, the steam output by the first steam injection unit 31 can be directly sprayed onto the surface of the tableware to be washed, avoiding the steam from adhering to the surface of the tableware after moving in the inner tank, thus improving the steam utilization rate.

[0062] Preferably, the first projection generated downward by the first steam injection unit 31 at least partially overlaps with the second projection generated downward by the tableware to be washed;

[0063] Preferably, the first projection covers the second projection, which can ensure that the steam output by the first steam jet unit 31 fully covers the tableware to be washed, improve the diffusion efficiency of high-temperature steam, ensure that all parts of the tableware to be washed can fully contact the steam, and improve the cleaning effect of the tableware to be washed.

[0064] Preferably, the first steam injection unit 31 includes a first housing 313 with a cavity structure. A first air inlet 314 and a jet nozzle 311 are formed at the bottom of the first housing 313. Steam enters the interior of the first housing 313 through the first air inlet 314 and is injected upwards onto the surface of the tableware to be washed through at least a portion of the jet nozzles 311 on the first housing 313, thus cleaning the tableware. It is understood that the jet nozzles 311 are located on the top wall and / or side wall of the first housing 313. Preferably, the jet nozzles 311 are located on the top wall of the first housing 313.

[0065] Preferably, multiple jet holes 311 are provided, and each jet hole 311 is evenly spaced.

[0066] More preferably, the spray range of the jet hole 311 substantially covers the tableware to be washed;

[0067] Preferably, a first steam nozzle 312 is installed on the jet hole 311. By setting the first steam nozzle 312, not only can the direction and range of steam jet be effectively controlled, but also the steam flow rate and flow rate can be controlled, further improving the cleaning effect of the dishes to be washed.

[0068] Preferably, the dishwasher includes a first conveying pipe 43 and a second conveying pipe 42. The output end of the first conveying pipe 43 passes through the shelf 2 and is connected to the first steam injection unit 31. The first conveying pipe 43 is capable of conveying steam to the first housing 313 of the first steam injection unit 31. It is understood that the first conveying pipe 43 is at least partially disposed in the inner tub of the dishwasher. Preferably, the first conveying pipe 43 is partially disposed in the housing 1 of the dishwasher and the other part is disposed in the inner tub of the dishwasher. More preferably, the first conveying pipe 43 extends horizontally at the bottom of the inner tub and then changes direction to extend vertically, connecting to the first air inlet 314 of the first housing 313.

[0069] Preferably, the steam output assembly 3 includes a second steam injection unit 32.

[0070] Preferably, the second steam injection unit 32 is located above the shelf 2 and is used to inject steam downwards;

[0071] Preferably, the second steam injection unit 32 is installed on the top wall of the inner liner;

[0072] Preferably, the second steam injection unit 32 is rotatably disposed.

[0073] Specifically, the second delivery pipe 42 is partially located in the inner tub of the dishwasher and partially located in the casing 1 of the dishwasher. Furthermore, the second delivery pipe 42 extends vertically from the bottom to the top of the inner tub, then reverses direction and extends horizontally to communicate with the second steam injection unit 32, enabling it to deliver steam to the second steam injection unit 32.

[0074] Furthermore, the second steam injection unit 32 is a rotating arm 321. The rotating arm 321 has a second air inlet connected to the second conveying pipe 42. The rotating arm 321 is also provided with multiple air jets for injecting steam into the inner tank. Through the multiple air jets, multiple high-speed steam jets can be formed to drive the rotating arm 321 to rotate clockwise or counterclockwise, evenly injecting steam into the inner tank, avoiding excessive steam in some areas and insufficient steam in others, which would reduce the cleaning effect of the dishes to be washed. It is understood that the second steam injection unit 32 can also be an existing spray arm 321. The shape of the air jets is not limited; they can be circular or elliptical, and the number of air jets is adapted to the power required for the rotation of the rotating arm 321.

[0075] Furthermore, multiple jet nozzles are evenly spaced on the lower surface of the rotating arm 321.

[0076] Furthermore, each jet nozzle is equipped with a second steam nozzle 322. Similarly, by adjusting the direction and range of the second steam nozzle 322, the flow rate and volume of the steam sprayed by the second steam nozzle 322 are controlled, thereby improving the cleaning effect on the dishes to be washed.

[0077] Preferably, the dishwasher also includes a third conveying pipe 44 and a fourth conveying pipe 41. One end of the third conveying pipe 44, the fourth conveying pipe 41, the first conveying pipe 43 and the second conveying pipe 42 intersect to form an intersection point, and the other end of the fourth conveying pipe 41 is connected to the water tank 7.

[0078] The dishwasher also includes a valve assembly 6, which includes a one-way valve 62 and a switching valve 61. The switching valve 61 is located at the intersection of one end of the third conveying pipe 44, the fourth conveying pipe 41, the first conveying pipe 43, and the second conveying pipe 42. By controlling the switching valve 61 through the controller, the connection or disconnection of the third conveying pipe 44, the fourth conveying pipe 41, the first conveying pipe 43, and the second conveying pipe 42 can be realized.

[0079] Furthermore, the dishwasher also includes a water pump 9 and a steam generator 8. The water pump 9 and the steam generator 8 are sequentially arranged in the fourth delivery pipe 41 in the direction from the water tank 7 to the switching valve 61. The water pump 9 is started by the controller of the dishwasher, which makes the water in the water tank 7 flow along the extension direction of the fourth delivery pipe 41 towards the steam generator 8. The water passing through the steam generator 8 is heated by the heating element inside the steam generator 8, and steam is generated and enters the first delivery pipe 43 and the second delivery pipe 42. Steam is injected into the inner tank through the first steam injection unit 31 and the second steam injection unit 32 connected to the first delivery pipe 43 and the second delivery pipe 42 to clean the dishes to be washed.

[0080] It should be noted that the water tank 7, steam generator 8, and water pump 9 can also be encapsulated in a separate functional module and placed outside the dishwasher. This functional module can be connected to the dishwasher via a connecting pipe to deliver steam into the dishwasher.

[0081] Furthermore, a liquid level sensor is installed inside the water tank 7. When the liquid level sensor detects that the water tank 7 has reached the set minimum liquid level, it controls the water pump 9 to shut down and the fourth delivery pipeline 41 to stop supplying water to the steam generator 8, thus ensuring the safety of the water tank 7.

[0082] Furthermore, a filter is installed at the connection between the water tank 7 and the fourth delivery pipeline 41. The water supplied from the water tank 7 to the fourth delivery pipeline 41 is filtered through the filter to remove foreign matter, ensuring that the water entering the steam generator 8 is cleaner and further ensuring the safety of the steam generator 8.

[0083] In addition, the steam generator 8 is equipped with a temperature sensor and a water level sensor. Water is added to the steam generator 8 when the water level is too low, and water addition stops when the water level exceeds the maximum level. The temperature sensor detects the water temperature inside the steam generator 8. When the water level is too low and dry burning occurs, the temperature sensor will lower its reading and issue a low water level warning. The temperature sensor protects the heating equipment inside the steam generator 8 by monitoring temperature changes.

[0084] A one-way valve 62 is installed on the fourth delivery pipeline 41, located between the switching valve 61 and the steam generator 8, to prevent high-temperature steam from flowing back along the steam generator 8 towards the water pump 9.

[0085] In addition, the dishwasher also includes an auxiliary unit 5, which is located in the third conveying pipe 44. The auxiliary unit 5 is controlled by a controller to operate. The auxiliary unit 5 is used to pressurize the steam passing through the first conveying pipe 43 and / or the second conveying pipe 42, thereby increasing the steam pressure entering the first conveying pipe 43 and / or the second conveying pipe 42, further increasing the steam flow rate, improving the efficiency of the steam injection units 32 and 31, ensuring that the steam can quickly and fully cover the surface of the tableware, and improving the cleaning effect of the tableware. Preferably, the auxiliary unit 5 is a fan.

[0086] like Figures 2 to 4 As shown, the present invention also provides a control method for a dishwasher, including,

[0087] Start the cleaning process;

[0088] Control at least part of the steam output component 3 to spray steam onto the dishes to be washed placed on the shelf 2.

[0089] Preferably, after the steam injection ends and / or before the steam injection begins, it further includes,

[0090] Control the dishwasher to perform the spraying operation;

[0091] Once the spraying process meets the preset conditions, it ends. Spraying the steam-treated tableware achieves a deeper level of cleaning; additionally, spraying the tableware before steam spraying can rinse away some larger food residues, improving the cleaning effect of subsequent steam spraying.

[0092] Specifically, when the dishwasher is controlled to perform the spraying operation, the controller controls the steam generator 8 to not work. That is, no steam is generated when water passes through the steam generator 8. At this time, the steam generator 8 acts as a water passage, so that the water in the water tank 7 is sprayed through the fourth conveying pipe 41, the first conveying pipe 43 and the first steam injection unit 31 and / or through the fourth conveying pipe 41, the second conveying pipe 42 and the second steam injection unit 32.

[0093] Alternatively, the dishwasher may also include a water pipe and a pump mounted on the water pipe for delivering water to the first delivery line 43 and / or the second delivery line 42.

[0094] Specifically, one end of the water pipe is connected to the water tank 7, and the other end is connected to the fourth delivery pipeline 41 between the one-way valve 62 and the switching valve 61. After the steam injection ends and / or before the steam injection begins, the controller controls the pump to connect the water in the water tank 7 to the first delivery pipeline 43 and / or the second delivery pipeline 42 through the water pipe.

[0095] Preferably, the preset conditions include at least the duration of the spraying operation, that is, the spraying stops after the preset duration is reached.

[0096] Preferably, before controlling at least a portion of the steam output component 3 to spray steam onto the dishes to be washed placed on the shelf 2, the following steps are included:

[0097] The control switching valve 61 connects the third delivery pipeline 44 to at least one of the first delivery pipeline 43 and the second delivery pipeline 42.

[0098] Preferably, while controlling at least part of the steam output component 3 to spray steam onto the dishes to be washed placed on the shelf 2, the auxiliary unit 5 is controlled to operate with preset parameters, and the auxiliary unit 5 stops after the running time reaches the set time.

[0099] Preferably, controlling at least a portion of the steam output component 3 to spray steam onto the dishes to be washed placed on the shelf 2 includes,

[0100] Obtain the soiling parameters of the tableware to be washed;

[0101] Specifically, the soiling parameters of the dishes to be washed should include at least one of the following: the weight of food residue and the amount of grease.

[0102] If the dirt parameter is greater than a set threshold, control the steam output component 3 to spray steam onto the dishes to be washed placed on the shelf 2; otherwise, control part of the steam output component 3 to spray steam onto the dishes to be washed placed on the shelf 2.

[0103] Furthermore, the dishwasher is equipped with an image sensor. When the user places the dishes to be washed on the rack 2 inside the inner drum, the image sensor captures an image of the dishes and sends it to the controller. The controller obtains the dirt parameters from the received image and compares the values ​​with a set threshold. If the dirt parameter value is greater than the set threshold, to improve cleaning efficiency and shorten cleaning time, all steam output components 3 are controlled to spray steam onto the dishes placed on the rack 2. If the dirt parameter value is not greater than the set threshold, only some steam output components 3 are controlled to spray steam. Understandably, the user can also choose the number of steam output components 3 to activate according to their actual needs.

[0104] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A dishwasher, characterized in that, include, Inner liner; A shelf (2) is provided in the inner liner for placing tableware to be washed; Steam output assembly (3), which is installed in the inner liner; At least part of the steam output component (3) is disposed on the shelf (2) for spraying steam onto the tableware to be washed.

2. The dishwasher according to claim 1, characterized in that, The steam output assembly (3) includes a first steam injection unit (31), which is located at the bottom of the shelf (2); Preferably, the first steam injection unit (31) is located between the shelf (2) and the tableware to be washed.

3. The dishwasher according to claim 2, characterized in that, The first projection generated downward by the first steam injection unit (31) at least partially overlaps with the second projection generated downward by the tableware to be washed; Preferably, the first projection covers the second projection.

4. The dishwasher according to any one of claims 2-3, characterized in that, The first steam injection unit (31) has an air jet hole (311) which at least partially injects steam upward. Preferably, there are multiple jet holes (311) evenly spaced; More preferably, the spray range of the jet hole (311) substantially covers the tableware to be washed; Preferably, a first steam nozzle (312) is installed on the jet hole (311).

5. The dishwasher according to any one of claims 2-4, characterized in that, The steam output assembly (3) includes, The second steam injection unit (32) is located above the shelf (2) and is used to inject steam downwards; Preferably, the second steam injection unit (32) is installed on the top wall of the inner liner; Preferably, the second steam injection unit (32) is rotatably disposed.

6. The dishwasher according to any one of claims 2-5, characterized in that, The dishwasher includes, The first conveying pipeline (43) has its output end passing through the shelf (2) and connected to the first steam injection unit (31). The first conveying pipeline (43) is capable of conveying steam to the first steam injection unit (31). Preferably, the dishwasher includes a second delivery pipe (42), the output end of which is connected to the second steam injection unit (32), and the second delivery pipe (42) is capable of delivering steam to the second steam injection unit (32); Preferably, the dishwasher includes a third delivery pipe (44) and an auxiliary unit (5) disposed on the third delivery pipe (44), the third delivery pipe (44) being connected to the first delivery pipe (43) and the second delivery pipe (42), and the auxiliary unit (5) being used to pressurize the steam passing through the first delivery pipe (43) and / or the first delivery pipe (43); Preferably, the dishwasher includes a valve assembly (6) including a switching valve (61) for controlling the connection and disconnection of the third delivery line (44) with at least one of the first delivery line (43) and the second delivery line (42).

7. A method for controlling a dishwasher, employing a dishwasher as described in any one of claims 1-6, characterized in that, include, Start the cleaning process; Control at least part of the steam output component (32) to spray steam onto the dishes to be washed placed on the shelf (2).

8. The control method for a dishwasher according to claim 7, characterized in that, After steam injection ends and / or before steam injection begins, it also includes, Control the dishwasher to perform the spraying operation; Once the spraying operation meets the preset conditions, the spraying process is terminated.

9. The control method for a dishwasher according to claim 7, characterized in that, Before controlling at least a portion of the steam output assembly (32) to spray steam onto the dishes to be washed placed on the shelf (2), including, The control switching valve (61) connects the third delivery line (44) to at least one of the first delivery line (43) and the second delivery line (42).

10. The control method for a dishwasher according to any one of claims 7-9, characterized in that, Controlling at least a portion of the steam output component (3) to spray steam onto the dishes to be washed placed on the shelf, including, Obtain the soiling parameters of the tableware to be washed; Determine whether the value of the dirt parameter is greater than a set threshold. If yes, control the steam output component (3) to spray steam onto the tableware to be washed placed on the shelf (2). If no, control part of the steam output component (3) to spray steam onto the tableware to be washed placed on the shelf (2).

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