A cleaning machine and a cleaning method

Abstract

The present application relates to a kind of cleaning machine and cleaning method, including box, spray arm, water pumping assembly and flow guide seat, the notch around water pumping assembly outer periphery is arranged on the bottom wall of box, and the surrounding edge extending downward from the edge of notch is arranged, the heating element is arranged in the bottom of surrounding edge, the heating element and surrounding edge are enclosed into recess in communication with washing cavity, flow guide seat is through from top to bottom, and the upper port is connected with the water inlet of spray arm, the lower port extends along radial direction and forms cover plate covering notch. The recess is used as backwater area, which greatly reduces the volume of backwater area, and is beneficial to improve backwater efficiency and energy efficiency, water efficiency of cleaning machine, the bottom of recess is directly contacted with heating element, which is not only beneficial to improve the heating efficiency of washing water, but also can heat a small amount of water in recess to generate steam, and steam is sprayed upward through the spray hole of spray arm, and the dishes are prewashed by steam, steam is diffused from lower to upper multiple spray holes in the box, which is beneficial to uniform diffusion and eliminate steam prewashing dead angle.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, specifically to a cleaning machine and a cleaning method. Background Technology

[0002] As people's living standards continue to improve, dishwashers, as a type of kitchen appliance, are increasingly entering households. Currently, dishwashers on the market are generally divided into three types: countertop, cabinet, and sink. Countertop dishwashers are freestanding units that are typically placed on the countertop; cabinet dishwashers are also freestanding units, but they need to be integrated into kitchen cabinets; and sink dishwashers are integrated with the sink and are typically installed in kitchen cabinets.

[0003] Tank-type dishwashers, such as the "Tank-type Washing Machine" disclosed in ZL 201310749864.9 and the "Washing Machine" disclosed in CN201811288822.9, require the use of a heating plate to heat the return water. The heating plate needs to be set at the bottom of the return water area, which requires the area of ​​the return water area to be large, thus limiting the return water rate and the energy efficiency and water efficiency of the washing machine to a certain extent.

[0004] The aforementioned dishwashers generally clean dishes by using a water pump to lift and spray water onto the dishes within the washing space. During the water wash phase, the temperature typically does not exceed 70°C, which can cause stubborn stains to adhere to the surface and be difficult to remove. To address this issue, Chinese invention patent CN205019008U, titled "Dishwasher" (application number: CN201520509852.3), discloses a structure comprising: an inner tank; a water cup located at the bottom of the inner tank; a steam generator with its steam outlet connected to the interior space of the inner tank; and a water supply system connected to a water source, the water cup, and the steam generator. This structure enables steam pre-washing, thereby removing stubborn stains and improving cleaning effectiveness. However, because it directly introduces steam into the inner tank, it requires steam inlets on the side wall of the inner tank, which is inconvenient for production and assembly. Furthermore, the steam is difficult to disperse evenly within the inner tank, resulting in cleaning dead zones during steam pre-washing and affecting the overall cleaning effect.

[0005] Therefore, further improvements are needed for current dishwashers. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a cleaning machine that can reduce the return water volume, thereby increasing the return water rate and thus improving the energy efficiency and water efficiency of the cleaning machine, in view of the current state of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a cleaning machine that is easy to produce and assemble, can improve the uniformity of steam dispersion to eliminate cleaning dead corners and improve the cleaning effect, in view of the current situation of the prior art.

[0008] The third technical problem to be solved by the present invention is to provide a cleaning method using the above-mentioned cleaning machine, which is conducive to the rapid and uniform dispersion of steam in the washing chamber, thereby improving the efficiency and effect of removing stubborn dirt.

[0009] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows:

[0010] A cleaning machine includes a housing, a spray arm, a water-collecting assembly, and a flow guide seat. The housing is hollow to form a washing chamber. The spray arm is located at the bottom of the washing chamber and has a water inlet on its bottom wall and multiple spray holes on its top wall. The water-collecting assembly is located at the bottom of the housing and is used to pump water from the bottom of the housing into the spray arm. The flow guide seat is located at the bottom of the washing chamber and is used to support the spray arm. The bottom wall of the housing has a notch arranged around the periphery of the water-collecting assembly and a rim extending downward from the edge of the notch. A heating element is provided at the bottom of the rim. The heating element and the rim together form a groove communicating with the washing chamber. The flow guide seat is vertically continuous, with its upper end connected to the water inlet of the spray arm and its lower end extending radially to form a cover plate covering the notch.

[0011] Preferably, the outer edge of the cover plate extends downward to form a support edge arranged around the periphery of the notch. A gap is created between the cover plate and the bottom wall of the housing by the support edge. This gap, together with the internal space of the guide seat, forms a gas channel that guides the steam generated in the groove by the heating element to the spray arm. The support edge facilitates the installation of the guide seat, which can be secured to the bottom of the housing using screws or other easily assembled structures. Furthermore, the support edge creates a gap, allowing steam to flow upwards.

[0012] Further preferably, the support edge has an opening for water from the bottom of the tank to enter the groove and / or for steam generated in the groove to overflow to the bottom of the washing chamber. Multiple openings can be provided and spaced apart around the guide seat. This facilitates faster water return and, during the steam pre-washing stage, allows a small amount of steam to diffuse at the bottom of the washing chamber below the spray arm, resulting in more uniform steam diffusion and eliminating dead zones in the steam pre-washing process.

[0013] Preferably, the groove is provided with a longitudinally extending baffle for guiding steam upward. This baffle not only makes the steam formation in the groove more uniform, but also guides the steam upward, improving steam transport and diffusion efficiency. Furthermore, the housing of this invention can be made of plastic, and the aforementioned baffle helps to strengthen the bottom of the housing.

[0014] Preferably, the side of the partition is constrained to the inner wall of the surrounding edge, and there is a gap between the bottom of the partition and the bottom wall of the groove. The gap between the bottom of the partition and the bottom of the groove is to maintain the flow of water at the bottom of the groove, keep the water level consistent throughout the groove, and improve the uniformity of steam generation.

[0015] More preferably, the height of the spacing is 0.05 to 0.25 times the height of the groove. The height of the groove is 12 to 30 mm, and the height of the spacing is 2 to 3 mm.

[0016] Preferably, the partition includes a circumferential partition extending circumferentially along the groove and a radial partition extending radially along the groove, wherein the circumferential and radial partitions are arranged intersectingly to divide the internal space of the groove into a grid-like structure. The box body of the present invention can be manufactured using plastic material, and the partition structure described above helps to strengthen the bottom of the box body.

[0017] In this invention, a drain trough for installing a slag collection basket is provided at the bottom of the housing. The drain trough is located next to the groove, and the edge of the drain trough is tangentially connected to the edge of the groove to form a continuous return water area. This structure ensures that the return water only passes through the slag filtration and return water heating area, greatly reducing the volume of the return water area, reducing the amount of washing water, and effectively improving the return water effect and the heating efficiency of the washing water.

[0018] Preferably, the connection between the drain trough and the groove forms a guide surface that is higher than the bottom wall of the groove and the drain trough but lower than the inner bottom wall of the box. Preferably, the outer edge of the partition that connects with the guide surface forms a guide slope that gradually slopes from the inside to the outside and from top to bottom along the groove. The above structure is beneficial to further improve the water return efficiency.

[0019] Preferably, the bottom of the drain groove has a drain outlet, the height of which is lower than the height of the groove.

[0020] Preferably, the heating element is a thick film heating plate, which covers the bottom of the surrounding edge.

[0021] In order to reduce energy loss and improve water efficiency, a first guide arc surface is formed at the upper port of the guide seat, which is smoothly connected to the water inlet of the spray arm, and / or a second guide arc surface is formed at the lower port of the guide seat, which is smoothly connected to the lower wall of the cover plate.

[0022] Preferably, the water intake assembly includes an impeller and a motor. The impeller is rotatably disposed in the washing chamber, with the upper part being a centrifugal impeller located in the spray arm through the water inlet and the lower part being an axial flow impeller located in the guide seat. The motor is disposed on the outer bottom wall of the housing and the output shaft passes through the bottom wall of the housing and is connected to the impeller.

[0023] Preferably, a liquid level sensor is provided in the groove, and / or the heating element is connected to a manual or automatic temperature controller. During the steam pre-washing stage, when heating a small amount of water in the groove, dry burning can easily occur after the water evaporates. The above-mentioned structure allows for timely interruption of the heating element, preventing dry burning.

[0024] A cleaning method using the aforementioned cleaning machine includes the following steps:

[0025] Initially, a small amount of water is introduced, and as the water volume meets the requirements for steam pre-washing, the water flows into the groove.

[0026] Turn on the heating element to heat the water in the groove and generate steam. The steam enters the spray arm through the notch and guide seat, and then diffuses from bottom to top through the spray holes at the top of the spray arm to pre-clean the dishes with steam.

[0027] After steam pre-cleaning is completed, stop heating the heating elements;

[0028] Water is added again, in large quantities, until the water volume meets the washing water demand and the groove is filled with water.

[0029] Turn on the heating element to heat the washing water. Once the water reaches the required temperature, turn off the heating element.

[0030] When the water intake component is in operation, it continuously draws heated washing water into the spray arm and sprays it upwards, maintaining water circulation until the washing is completed, at which point the operation of the water intake component stops.

[0031] Drain the water until a small amount of water remains in the groove. This small amount of water, relying on the heating element and its own residual heat, forms steam, which enters the spray arm through the notch and guide seat, and further diffuses from bottom to top through the spray holes at the top of the spray arm to steam sterilize and disinfect the dishes.

[0032] Compared with the prior art, the advantages of the present invention are as follows: The present invention provides a groove on the outer periphery of the water-drawing component and a heating element at the bottom of the groove. The groove serves as a return water area, which greatly reduces the volume of the return water area and is conducive to improving the return water efficiency and the energy and water efficiency of the washing machine. On the other hand, the bottom of the groove is in direct contact with the heating element, which not only improves the heating efficiency of the washing water, but also heats a small amount of water in the groove to generate steam. The steam is then sprayed upward through the nozzles of the spray arm to pre-wash the dishes with steam. The steam diffuses from bottom to top through multiple nozzles in the chamber, which is conducive to uniform diffusion, eliminates dead corners in the steam pre-washing, and improves the cleaning effect. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the bottom structure of an embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0036] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0037] Figure 5 This is a schematic diagram of the structure of the box body according to an embodiment of the present invention;

[0038] Figure 6 This is a cross-sectional view of the housing according to an embodiment of the present invention;

[0039] Figure 7 This is a partial cross-sectional view of the housing according to an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the flow guide seat in an embodiment of the present invention. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] The cleaning machine in this embodiment can be a tabletop, cabinet, or trough type; this embodiment uses a trough type structure for description.

[0043] like Figures 1-8 As shown, the cleaning machine in this embodiment includes a housing 1, a spray arm 2, a water intake assembly 3, and a flow guide seat 4. The housing 1 is hollow to form a washing chamber 11, which has a top opening and a door that can be opened. Figure 4 As shown, the spray arm 2 is located at the bottom of the washing chamber 11, with a water inlet 21 on its bottom wall and multiple spray holes 22 on its top wall. The spray arm 2 has an internal flow channel connecting the water inlet 21 and the spray holes 22. The water intake assembly 3 is located at the bottom of the tank 1 and is used to pump water from the bottom of the tank 1 into the spray arm 2. The guide seat 4 is located at the bottom of the washing chamber 11 and is used to support the spray arm 2. The spray arm 2 is rotatably mounted on top of the guide seat 4 via a retaining ring. The specific assembly structure of the spray arm 2 and the guide seat 4 is existing mature technology and will not be described in detail here.

[0044] like Figure 4 As shown, the bottom wall of the housing 1 in this embodiment has a notch 12 arranged around the outer periphery of the water-drawing component 3 and a surrounding edge 13 extending downward from the edge of the notch 12. A heating element 5 is provided at the bottom of the surrounding edge 13. The heating element 5 is a thick film heating plate. The thick film heating plate covers the bottom of the surrounding edge 13 and is connected to the bottom wall of the housing by heat riveting. A sealing ring is provided at the connection to achieve the sealing of the bottom of the washing chamber.

[0045] The aforementioned heating element 5 and the surrounding edge 13 together form a groove 50 that communicates with the washing chamber 11. The guide seat 4 is vertically continuous, with its upper end connected to the water inlet 21 of the spray arm 2, and its lower end extending radially to form a cover plate 41 covering the notch 12. In order to reduce energy loss and improve water efficiency, a first guide arc surface 42 is formed at the upper end of the guide seat 4 that smoothly transitions to the water inlet 21 of the spray arm 2, and a second guide arc surface 43 is formed at the lower end of the guide seat 4 that smoothly transitions to the lower wall of the cover plate 41.

[0046] In this embodiment, as Figure 8 As shown, the outer edge of the cover plate 41 extends downward to form a support edge 411 arranged around the periphery of the notch 12. The support edge 411 constrains a gap 410 between the cover plate 41 and the inner bottom wall of the housing 1. This gap 410, together with the internal space of the guide seat 4, forms a gas guiding channel that can guide the steam generated in the groove 50 by the heating element 5 to the spray arm 2. The support edge 411 facilitates the installation of the guide seat 4. The support edge 411 can be used to constrain the guide seat 4 to the bottom of the housing 1 by means of screws or other easy-to-assemble structures. On the other hand, the support edge 411 is used to form the gap 410, which facilitates the upward flow of steam.

[0047] The aforementioned support edge 411 has an opening 412 for water from the bottom of the tank 1 to enter the groove 50 and for steam generated in the groove 50 to overflow to the bottom of the washing chamber 11. Multiple openings 412 can be provided and spaced upwards around the guide seat 4. This facilitates faster water return and, during the steam pre-washing stage, allows a small amount of steam to diffuse at the bottom of the washing chamber 11 below the spray arm 2, resulting in more uniform steam diffusion and eliminating dead zones in the steam pre-washing process.

[0048] In this embodiment, a longitudinally extending baffle 14 is provided in the groove 50 for guiding steam upwards. The baffle 14 not only makes the steam formation in the groove 50 more uniform, but also guides the steam upwards, improving steam transport and diffusion efficiency. Furthermore, the housing 1 in this embodiment can be made of plastic, and the baffle 14 helps to strengthen the bottom of the housing 1. Figure 5 , 6 As shown, the partition 14 includes a circumferential partition 141 extending circumferentially along the groove 50 and a radial partition 142 extending radially along the groove 50. The circumferential partition 141 and the radial partition 142 are arranged intersectingly to divide the internal space of the groove 50 into a grid-like structure. The two ends of the radial partition 142 are respectively connected to the inner wall of the corresponding perimeter 13, as shown... Figure 7As shown, there is a gap 15 between the bottom of the partition 14 and the bottom wall of the groove 50. The height h of the gap 15 is 0.05 to 0.25 times the height H of the groove 50. In this embodiment, the height of the groove 50 is 12 to 30 mm, and the height of the gap 15 is 2 to 3 mm. The gap 15 between the bottom of the partition 15 and the bottom of the groove 50 is to maintain the flow of water at the bottom of the groove 50, keep the water level consistent throughout the groove 50, and improve the uniformity of steam generation.

[0049] In this embodiment, as Figure 5 , 6 As shown, the bottom of the housing 1 is provided with a drain trough 16 for installing the slag collection basket 6. The drain trough 16 is located beside the groove 50, and the edge of the drain trough 16 is tangentially connected to the edge of the groove 50 to form a through-flow return water area 17. A separate filter screen can be covered on top of the return water area 17 outside the cover plate 41. This structure allows the return water to pass only through the slag filtration and return water heating area, greatly reducing the volume of the return water area, reducing the amount of washing water, and effectively improving the return water effect and the heating efficiency of the washing water.

[0050] The connection between the drain trough 16 and the groove 50 forms a guide surface 18 that is higher than the bottom wall of the groove 50 and the drain trough 16, but lower than the inner bottom wall of the box body 1. The outer edge of the radial baffle 142, which connects with the guide surface 18, forms a guide slope 143 that gradually slopes from the inside to the outside and from top to bottom along the groove 50. The above structure is beneficial to further improve the water return efficiency. A drain outlet 161 is opened at the bottom of the drain trough 16, and the height of the drain outlet 161 is lower than the height of the groove 50.

[0051] like Figure 4 As shown, the water intake assembly 3 of this embodiment includes an impeller and a motor 32. The impeller is rotatably disposed in the washing chamber 11, with the upper part being a centrifugal impeller 311 located in the spray arm 2 through the water inlet 21 and the lower part being an axial flow impeller 312 located in the guide seat 4. The motor 32 is disposed on the outer bottom wall of the housing 1 and the output shaft 321 passes through the bottom wall of the housing 1 and is connected to the impeller.

[0052] A liquid level sensor can be installed in the groove 50, and / or the heating element 5 is connected to a manual or automatic temperature controller. During the steam pre-washing stage, when heating a small amount of water in the groove 50, dry burning is likely to occur after the small amount of water has evaporated. The above structure can interrupt the heating element in time to avoid dry burning.

[0053] The water inlet structure of this embodiment can be directly connected to the groove 50, or, as in the prior art, the water inlet can be set on the side wall of the tank 1, and the bottom wall of the tank 1 can be made into a structure that gradually slopes downward from the edge to the groove 50, so that the water can always maintain the tendency to flow into the groove 50.

[0054] In this embodiment, the cleaning method using the above-mentioned cleaning machine includes the following steps:

[0055] Initially, a small amount of water is introduced, and as the water volume meets the requirements for steam pre-washing, the water flows into the groove 50.

[0056] Turn on the heating element 5 to heat the water in the groove 50 and generate steam. The steam enters the spray arm 2 through the notch 13 and the guide seat 4, and further diffuses from bottom to top through the spray hole 22 at the top of the spray arm 2 to pre-clean the dishes with steam.

[0057] After the steam pre-cleaning is completed, stop heating of heating element 5;

[0058] Water is added again, in large quantities, until the water volume meets the washing water demand, and the groove is filled with water to 50.

[0059] Turn on heating element 5 to heat the washing water. Once the water reaches the required temperature, turn off heating element 5.

[0060] When the water intake component 3 is in operation, it continuously draws heated washing water into the spray arm 2 and sprays it upwards, maintaining water circulation until the washing is completed, at which point the operation of the water intake component 3 is stopped.

[0061] Drain the water until a small amount of water remains in the groove 50. This small amount of water forms steam by the heating element 5 and its own residual heat. It enters the spray arm 2 through the notch 13 and the guide seat 4, and further diffuses from bottom to top through the spray hole 22 at the top of the spray arm 2 to steam sterilize and disinfect the dishes.

[0062] In this embodiment, a groove 50 is provided on the outer periphery of the water-drawing component 3, and a heating element 5 is provided at the bottom of the groove 50. The groove 50 is used together with the drain trough 16 as a return water area, which greatly reduces the volume of the return water area and is conducive to improving the return water efficiency and the energy and water efficiency of the washing machine. On the other hand, the bottom of the groove 50 is in direct contact with the heating element 5, which not only helps to improve the heating efficiency of the washing water, but also can heat the small amount of water in the groove 50 to generate steam. The steam is sprayed upward through the spray holes 22 of the spray arm 2 to pre-wash the dishes with steam. The steam diffuses from bottom to top through the multiple spray holes 22 in the box 1, which is conducive to uniform diffusion, eliminating dead corners of steam pre-washing, and improving the cleaning effect.

[0063] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning machine comprising a box (1), a spray arm (2), a water pumping assembly (3) and a guide seat (4), the box (1) is internally hollow to form a washing cavity (11), the spray arm (2) is arranged at the bottom of the washing cavity (11) and has a water inlet (21) opened on the bottom wall and a spray hole (22) opened on the top wall, the water pumping assembly (3) is arranged at the bottom of the box (1) and used to pump water at the bottom of the box (1) into the spray arm (2), the guide seat (4) is arranged at the bottom of the washing cavity (11) and used to support the spray arm (2), characterized in that: The bottom wall of the box (1) is provided with a notch (12) arranged around the outer periphery of the water scooping assembly (3) and a surrounding edge (13) extending downward from the edge of the notch (12), and the bottom of the surrounding edge (13) is provided with a heating element (5), the heating element (5) and the surrounding edge (13) jointly form a groove (50) in communication with the washing cavity (11), and the flow guide seat (4) penetrates the flow guide seat (4) upward and downward, and the upper port is in communication with the water inlet (21) of the spray arm (2), and the lower port extends radially to form a cover plate (41) covering the notch (12). The groove (50) is provided with a partition plate (14) extending longitudinally and used for guiding steam upward, the side of the partition plate (14) is constrained on the inner wall of the surrounding edge (13), and the bottom of the partition plate (14) has a spacing (15) with the bottom wall of the groove (50), the partition plate (14) comprises a circumferential partition plate (141) extending circumferentially along the groove (50) and a radial partition plate (142) extending radially along the groove (50), and the circumferential partition plate (141) and the radial partition plate (142) are arranged in cross to separate the internal space of the groove (50) into a grid structure.

2. The cleaning machine of claim 1, wherein: The outer edge of the cover plate (41) extends downward to form a supporting edge (411) arranged around the outer periphery of the notch (12), and the gap (410) between the cover plate (41) and the inner bottom wall of the box (1) is constrained by the supporting edge (411), and the gap (410) and the internal space of the flow guide seat (4) jointly form an air guiding channel capable of guiding the steam generated in the groove (50) due to heating of the heating element (5) into the spray arm (2).

3. The cleaning machine of claim 2, wherein: The supporting edge (411) is provided with an opening (412) for the water at the bottom of the box (1) to enter the groove (50) and / or for the steam generated in the groove (50) to overflow to the bottom of the washing cavity (11).

4. The cleaning machine of claim 1, wherein: The height of the spacing (15) is 0.05-0.25 times the height of the groove (50).

5. The cleaning machine of claim 1, wherein: The height of the groove (50) is 12-30 mm, and the height of the spacing (15) is 2-3 mm.

6. The cleaning machine of claim 1, wherein: The bottom of the box (1) is provided with a drain groove (16) for mounting a slag collecting basket (6), the drain groove (16) is located beside the groove (50), and the edge of the drain groove (16) is tangentially connected with the edge of the groove (50) to form a through water return area (17).

7. The cleaning machine of claim 6, wherein: The joint part of the drain groove (16) and the groove (50) forms a flow guide surface (18) arranged higher than the bottom wall of the groove (50) and the drain groove (16) and lower than the inner bottom wall of the box (1).

8. The cleaning machine of claim 7, wherein: The outer edge of the partition plate (14) connected with the flow guide surface (18) forms a flow guide slope (143) gradually inclined from inside to outside and from top to bottom along the groove (50).

9. The cleaning machine of claim 6, wherein: The bottom of the drain groove (16) is provided with a drain port (161), and the height of the drain port (161) is lower than the height of the groove (50).

10. The cleaning machine of any one of claims 1-9, wherein: The heating element (5) is a thick film heating disc, and the thick film heating disc covers the bottom of the surrounding edge (13).

11. The cleaning machine of any one of claims 1-9, wherein: The upper end of the flow guide base (4) is formed with a first flow guide arc surface (42) which is smoothly connected with the water inlet (21) of the spray arm (2), and / or the lower end of the flow guide base (4) is formed with a second flow guide arc surface (43) which is smoothly connected with the lower wall surface of the cover plate (41).

12. The cleaning machine of any one of claims 1-9, wherein: The water pumping assembly (3) comprises an impeller and a motor (32), the impeller is rotatably arranged in the washing cavity (11) and has a centrifugal impeller (311) located in the spray arm (2) through the water inlet (21) and a axial flow impeller (312) located in the flow guide base (4), and the motor (32) is arranged on the outer bottom wall of the box body (1) and has an output shaft which penetrates the bottom wall of the box body (1) and is connected with the impeller.

13. The cleaning machine of any one of claims 1-9, wherein: The recess (50) is provided with a liquid level sensor, and / or the heating element (5) is connected with a manual or automatic temperature controller.

14. A cleaning method using the cleaning machine according to any one of claims 1 to 13, characterized by The method comprises the following steps: Primary water inlet, a small amount of water, until the water quantity meets the steam pre-washing requirement, the water flows into the recess (50); Start the heating element (5) to heat the water in the recess (50) to generate steam, the steam enters the spray arm (2) through the gap (12) and the flow guide base (4), and further diffuses from bottom to top through the spray holes (22) at the top of the spray arm (2) to pre-wash the dishes with steam; After the steam pre-washing is completed, stop the heating of the heating element (5); Secondary water inlet, a large amount of water, until the water quantity meets the washing water requirement, the water fills the recess (50); Start the heating element (5) to heat the washing water, and stop the heating of the heating element (5) after the temperature meets the requirement; The water pumping assembly (3) operates to continuously pump the heated washing water into the spray arm (2) and spray it upwards to keep the water circulation, and stops operating after the washing is completed.

15. The cleaning method of claim 14, wherein: After the water pumping assembly (3) stops operating, drain the water, until a small amount of water remains in the recess (50), the small amount of water forms steam by relying on the heating element (5) and its own residual heat, enters the spray arm (2) through the gap (12) and the flow guide base (4), and further diffuses from bottom to top through the spray holes (22) at the top of the spray arm (2) to sterilize and disinfect the dishes with steam.

Images