CN116195942A - Cleaning method of cleaning machine - Google Patents

Abstract

The invention relates to a cleaning method of a cleaning machine, which comprises the following steps: (1) The spray arm sinks under the action of dead weight, and the spray arm in a sinking state is connected with a power output shaft of the water pumping mechanism to limit the limit; inputting steam into the spray arm, operating the water pumping mechanism, driving the spray arm to rotate by the power output shaft, conveying the steam in the spray arm into the box body from bottom to top, and pre-washing tableware by the steam; (2) The water washing and pumping mechanism operates, water at the bottom of the box body is pumped into the spray arm, and the water in the spray arm gives upward force to the spray arm so as to lift the spray arm, and the spray arm in an upward floating state is decoupled from a power output shaft of the water pumping mechanism; the power output shaft of the water pumping mechanism continuously rotates to pump water into the spray arm, and the spray arm upwards shoots the water in a water column mode to wash tableware. The invention utilizes the spray arm to convey steam into the box body, thereby being beneficial to improving the diffusion speed and uniformity of the steam and improving the removal effect of stubborn dirt.

Description

Cleaning method of cleaning machine

Technical Field

The invention relates to the technical field of dish washers, in particular to a cleaning method of a cleaning machine.

Background

With the increasing level of living of people, dish washers are increasingly entering home as household electrical appliances for kitchen use. The existing dish-washing machines on the market are generally divided into three types of a desk type dish-washing machine, a cabinet type dish-washing machine and a trough type dish-washing machine, wherein the desk type dish-washing machine is of an integral independent structure and is generally placed on a desk for use; the cabinet type dish washer is also an independent structure, but needs to be embedded into a kitchen cabinet for use; the tub dishwasher is combined with a tub and is generally installed in a kitchen cabinet.

The dish washing machine of the above-mentioned various forms generally has a washing function by lifting water by a water pump and spraying the water toward dishes in a washing space. In general, the temperature of the dish washing machine in the washing stage is not higher than 70 degrees at most, and relatively tough stains can adhere to the surfaces of dishes and cannot be removed easily. To solve the above problems, the chinese patent publication No. CN205019008U, dish washer (application No. CN 201520509852.3), discloses a structure comprising: an inner container; the water cup is arranged at the bottom of the inner container; the steam outlet of the steam generator is communicated with the inner space of the liner; the water supply system is respectively connected with the water source, the water cup and the steam generator.

The scheme can be used for steam pre-washing, so that stubborn stains are removed, and the cleaning effect is improved. However, because the steam is directly added into the liner, the steam is difficult to disperse uniformly when directly input into the liner, so that the steam pre-washing has a cleaning dead angle and the cleaning effect is affected.

The applicant's prior application 201721042431.X et al discloses a structure in which bubbles are entrained in a water stream by aerating the shower arm, such a structure being advantageous for improving the dirt peeling degree of the dish surface by cavitation, thereby improving the cleaning effect. But it needs to set up the air pump and blow air in to the spray arm, and overall structure is comparatively complicated, and manufacturing cost is higher.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a cleaning method of a cleaning machine, which can improve steam dispersion uniformity, thereby eliminating cleaning dead angles and improving cleaning effect.

The second technical problem to be solved by the invention is to provide a cleaning method of a cleaning machine, which can automatically suck gas so as to enable bubbles to be entrained in water jet flow, further improve the cleaning effect and has low production cost.

The invention solves at least one of the technical problems by adopting the following technical proposal:

the cleaning method of the cleaning machine comprises a box body, a spray arm and a water pumping mechanism, wherein the spray arm is arranged in the box body and is close to the bottom, the water pumping mechanism is used for pumping water at the bottom of the box body into the spray arm, and a power output shaft of the water pumping mechanism penetrates through the box body and stretches into the spray arm; the spray arm can be restrained in the box body in a vertically floating mode, and the cleaning method comprises the following steps of:

(1) Steam pre-wash

The spray arm sinks under the action of dead weight, and the spray arm in a sinking state is linked with a power output shaft of the water pumping mechanism to generate limit in the circumferential direction; inputting steam into the spray arm, operating the water pumping mechanism, and driving the spray arm to rotate by the power output shaft, so that the steam in the spray arm is conveyed into the box body from bottom to top, and the tableware is pre-washed by the steam;

(2) Washing with water

Water is fed into the box body, and water feeding is stopped after the water feeding amount reaches the requirement;

the water pumping mechanism operates to pump water at the bottom of the box body into the spray arm, and the water in the spray arm gives upward force to the spray arm so as to lift the spray arm, and the spray arm in an upward floating state is decoupled from a power output shaft of the water pumping mechanism; the power output shaft of the water pumping mechanism continuously rotates to pump water into the spray arm, and the spray arm upwards shoots the water in a water column mode to wash tableware.

Preferably, in the steam pre-washing state, the rotating speed of the power output shaft is 20-100 n/min. Further preferably 60n/min.

Preferably, in the steam pre-washing and water washing states, the rotation direction of the power output shaft is consistent, and the rotation direction is consistent with the rotation direction of the impeller required by the water drawing direction, so that air flow loss caused by impeller reversal is avoided, and the diffusion effect of steam is improved.

Preferably, the inner top wall of the spray arm is provided with a plug bush which can be rotationally plugged with the upper end of the power output shaft, and the limiting structure is a matched structure of a protrusion and a groove arranged on the plug bush and the power output shaft. The structure is simple and reasonable, and is convenient for production and realization.

Further preferably, a plurality of protruding ribs extending vertically are arranged on the inner wall of the plug bush along the circumferential direction, clamping grooves are formed between the adjacent protruding ribs, correspondingly, protruding blocks capable of being inserted into the clamping grooves from bottom to top along with the upward floating of the spray arm and forming circumferential limiting with the spray arm are arranged on the peripheral wall of the upper portion of the power output shaft.

Still further, the width of the upper portion of the bump is gradually reduced from bottom to top to form a guide tip. In the floating state of the spray arm, the structure is convenient for inserting the lug into the clamping groove.

The cleaning machine further comprises a steam generator, and the steam output end of the steam generator is communicated with the spray arm. Preferably, the power output shaft is hollow to form an air guide channel, and the steam output end of the steam generator is communicated with the air guide channel. By adopting the structure, a steam input port is not required to be arranged on the box body, and the production and the assembly are convenient.

Preferably, a first spray hole is formed in the top wall of the spray arm, the spray arm is provided with an air collecting cavity which is positioned at the upstream of the first spray hole and used for conveying air to the direction of the first spray hole along the fluid circulation direction, and the upper port of the power output shaft is communicated with the air collecting cavity. The gas collecting cavity is not only convenient for uniformly dispersing steam to the positions of all spray holes, but also convenient for aerating the sprayed water flow, so that the steam conveying and cavitation aerating structure is integrated, the whole structure is simplified, and the cost is reduced.

Preferably, the middle part of the spray arm is provided with a water collecting cavity, the plug bush is arranged on the top wall of the water collecting cavity, the water pumping mechanism further comprises an impeller, and at least the upper part of the impeller can be rotatably positioned in the water collecting cavity and is connected with the power output shaft. The top of the impeller is provided with an end cover, the end cover gradually and downwards sinks from the edge to the central part to form a sunk area, and the sunk area is arranged corresponding to the plug bush. In the state that the spray arm is full of water, the top of the water collecting cavity can form negative pressure due to rotation of the impeller, the negative pressure is favorable for sucking fluid, but meanwhile, large bubbles are easy to accumulate at the position, so that the water flow injection lift is influenced, and even cavitation is seriously generated.

As an improvement, the spray arm comprises a body and a top plate arranged above the body, the body is provided with a flow channel extending along the length direction of the body, the top plate and the top wall of the body enclose the air collecting cavity together, the top wall of the body is provided with a second spray hole which is communicated with the flow channel and is positioned in the air collecting cavity, the first spray hole is arranged on the top plate and corresponds to the second spray hole, and a gap is reserved between the first spray hole and the second spray hole. By adopting the structure, according to the Venturi effect, in the process of jetting water flow through the second jet hole and the first jet hole, air in the air collecting cavity can be sucked into the water column through a gap between the second jet hole and the first jet hole, so that bubbles are entrained in the jet flow, and the bubbles are crushed on the surfaces of dishes or fruits and vegetables, so that the dirt stripping force can be improved, and the cleaning effect is improved; in addition, the gas is added into the jet flow in a self-air suction mode, an air pump and the like are not needed, and the production cost can be greatly reduced.

Preferably, the top plate is provided with a first nozzle extending along the axial direction of the first spray hole, and correspondingly, the top wall of the body is provided with a second nozzle extending upwards from the edge of the second spray hole. The first nozzle and the second nozzle are favorable for guiding water flow, so that a water column with larger jet force is formed.

In the steam pre-washing stage, steam generated by the steam generator is conveyed into the spray arm through the air guide channel of the power output shaft on the water pumping mechanism. In the washing stage, gas is input into the water jet flow through the gas guide channel of the power output shaft and the gas collecting cavity, so that bubbles are entrained in the water jet flow, and the stripping degree of dirt on the surfaces of the dishes is improved by cavitation.

In order to be convenient for install the spray arm, be provided with the guide bracket that is located the bottom in the box, the top of this guide bracket is provided with the rand, the bottom of spray arm can float from top to bottom and rotationally retrain on this rand.

Preferably, a water inlet and a guide sleeve extending downwards along the water inlet are arranged on the bottom wall of the spray arm, the lower end of the guide sleeve penetrates through an assembly opening on the clamping ring to be arranged, the lower edge of the guide sleeve is provided with a clamping foot propped against the bottom wall of the clamping ring, and in the assembled state, the height difference between the guide sleeve and the clamping ring as well as the bottom wall of the spray arm constrains the displacement of the spray arm floating up and down, namely, the distance between the upper wall surface of the clamping ring and the bottom wall of the spray arm is the displacement of the spray arm capable of floating up and down.

Preferably, a diversion channel is formed in the middle of the diversion seat, and the inner wall surface at the upper end of the diversion channel gradually and smoothly extends outwards to form a diversion surface which can be connected with the inner bottom wall at the water inlet of the spray arm. The outer edge of the guide surface is level with the inner bottom wall of the spray arm in a floating state, and the outer edge of the guide surface is higher than the inner bottom wall of the spray arm in a sinking state. By adopting the structure, the tightness between the guide seat and the water inlet of the spray arm is improved, and the fluid on the wall is leaked.

Compared with the prior art, the invention has the advantages that: according to the invention, steam is conveyed into the box body by the spray arm, and the spray arm is in a sinking state due to dead weight in a steam conveying state, and at the moment, the spray arm and the power output shaft are linked and limited so as to rotate, thereby being beneficial to improving the steam diffusion speed and uniformity, carrying out steam pre-cleaning on dishes and improving the removal effect on stubborn dirt; under the washing state, the spray arm is lifted up due to water pressure to cancel linkage with the power output shaft, and the spray arm rotates under the action of water flow viscous force, so that the rotating speed of the spray arm is conveniently controlled, and the washing requirement is met.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 at another angle;

FIG. 3 is a cross-sectional view of an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic view of a spray arm according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is an exploded view of FIG. 5;

FIG. 9 is a schematic view of a plug bush according to an embodiment of the present invention;

FIG. 10 is a schematic view of a power take-off shaft according to an embodiment of the present invention;

fig. 11 is an assembly view of a shower arm and a deflector base in an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 11, the cleaning machine of the present embodiment includes a box 1, a spray arm 2 and a water pumping mechanism 3, wherein the spray arm 2 is disposed in the box 1 and is disposed near the bottom, and the water pumping mechanism 3 is disposed at the bottom of the box 1 and is used for pumping water from the bottom of the box 1 into the spray arm 2.

As shown in fig. 3, the bottom of the tank 1 is provided with a recessed draining area 11, the top of the draining area 11 is covered with a draining board 12, a guiding seat 13 arranged through the draining board 11 is arranged in the draining area 11, the spray arm 2 is rotatably supported on the top of the guiding seat 13, and the pumping mechanism 3 is used for pumping water in the draining area 11 into the spray arm 2 above the draining board 12 through the guiding seat 13.

As shown in fig. 5, 6 and 8, the shower arm 2 has a flow passage 21 extending in the longitudinal direction, a substantially disk-shaped water collecting chamber 22 communicating with the flow passage 21 is provided in the center of the shower arm 2, a water inlet 23 communicating with the water collecting chamber 22 is provided in the bottom wall of the shower arm 2, and a water spraying hole is provided in the top wall.

The water pumping mechanism 3 comprises a motor 31 and an impeller 32, wherein the upper part of the impeller 32 is rotatably arranged in the water collecting cavity 22, the lower part of the impeller 32 is arranged below the water inlet 23, the upper part of the impeller 32 is a centrifugal impeller and is used for dispersing water in the water collecting cavity 22 into the flow channel 21, and the lower part of the impeller 32 is an axial flow impeller and is used for sucking water in the draining area 11 upwards. The motor 31 is arranged on the outer bottom wall of the box body 1, the power output shaft 311 of the motor 31 passes through the bottom wall of the box body 1 and upwards passes through the water inlet 23 to extend into the spray arm 2, and the impeller 32 is sleeved on the outer periphery of the power output shaft 311 and rotates along with the power output shaft 311.

As shown in fig. 1 and 3, the present embodiment is provided with a steam generator 4 that enables the washer to perform a steam pre-washing function and to sterilize dishes at a high temperature after washing is completed. The power output shaft 311 is hollow to form an air guide channel 310, and the steam output end of the steam generator 4 is communicated with the air guide channel 310.

The side wall of the upper part of the box body 1 is provided with a water flow input port 14, the corner of the bottom of the box body 1 is provided with a water inlet valve 5 communicated with a water source, a first output port 51 of the water inlet valve 5 is connected with the water flow input port 14 through a pipeline, and a second output port 52 of the water inlet valve 5 is connected with the input end of the steam generator 4 through a pipeline. The bottom of the pumping mechanism is provided with a tee joint 100, a first port of the tee joint 100 is connected with a lower port of a power output shaft 311, a second port of the tee joint 100 is connected with a steam output end of a steam generator 4 through a conduit 41, a third port is an air inlet, and a first one-way valve 7 which only allows air to enter is arranged at the air inlet. A second check valve allowing only steam to be output is provided between the steam output end of the steam generator 4 and the second port of the tee 100. The structure is convenient for switching between steam washing and water washing states and provides corresponding steam or air. The steam generator 4 is provided with a flow limiting mechanism capable of controlling the water flow rate for generating steam so as to control the steam flow.

The side wall of the box body 1 is provided with a ventilation opening 15, and the outer side of the box body 1 is provided with a ventilation mechanism 6 which is connected with the ventilation opening 15 and is used for inputting dry gas into the box body 1 and/or exhausting moisture in the box body 1. The ventilation mechanism 6 may be provided with a heating element for heating the air supplied into the casing 1. The structure is convenient for being matched with steam to realize disinfection and drying of dishes after washing.

In this embodiment, as shown in fig. 6, a first nozzle hole 24 is formed on the top wall of the spray arm 2, and the spray arm 2 has a gas collection chamber 25 located upstream of the first nozzle hole 24 for conveying gas in the direction of the first nozzle hole 24 along the fluid circulation direction, and the upper port of the power output shaft 311 is connected to the gas collection chamber 25. The air collecting cavity 25 is not only convenient for uniformly dispersing steam to the positions of all spray holes, but also convenient for aerating the water jet, so that the steam conveying and cavitation aerating structure is integrated, the whole structure is simplified, and the cost is reduced.

Specifically, the spray arm 2 includes a main body 2a and a top plate 2b disposed above the main body 2a, the flow channel 21 is located in the main body 2a and extends along the length direction of the main body 2a, and the top plate 2b and the top wall of the main body 2a enclose an air collecting cavity 25 together. The top wall of the main body 2a is provided with a second spray hole 26 which is communicated with the flow channel 21 and is positioned in the air collecting cavity 25, the first spray hole 24 is arranged on the top plate 2b and corresponds to the second spray hole 26, and as shown in fig. 7, a gap 200 is formed between the first spray hole 24 and the second spray hole 26. According to the Venturi effect, in the process of water flow passing through the second spray hole 26 and the first spray hole 24 and being emitted out, air in the air collecting cavity 25 can be sucked into the water column through a gap 200 between the two, so that bubbles are entrained in the jet flow, and the bubbles are crushed on the surfaces of dishes or fruits and vegetables, so that the dirt stripping force can be improved, and the cleaning effect is improved; in addition, the gas is added into the jet flow in a self-air suction mode, an air pump and the like are not needed, and the production cost can be greatly reduced.

In this embodiment, as shown in fig. 3 and 4, the shower arm 2 is restrained in the case 1 so as to be capable of floating up and down, and a limiting structure 200 is provided on the power output shaft 311 of the water pumping mechanism 3 and the shower arm 1 so as to limit the power output shaft 311 to the shower arm 2 in a submerged state and to release the limit to the shower arm 2 in a floating state.

As shown in fig. 11, the top of the deflector 13 is provided with a collar 131, and the bottom of the shower arm 2 is floatably and rotatably restrained on the collar 131. The bottom wall of the spray arm 2 is provided with a diversion sleeve 231 extending downwards along the water inlet 23, the lower end of the diversion sleeve 231 passes through an assembly port 1311 on the clamping ring 131 to be arranged, the lower edge of the diversion sleeve 231 is provided with a clamping foot 2311 propped against the bottom wall of the clamping ring 131, and under the assembled state, the height difference between the diversion sleeve 231 and the bottom wall of the clamping ring 131 and the bottom wall of the spray arm 2 constrains the displacement of the spray arm floating up and down, namely, the distance between the upper wall surface of the clamping ring 131 and the bottom wall of the spray arm 2 is the displacement of the spray arm 2 capable of floating up and down, the displacement is controlled to be 2-5 mm, and the effect of a limiting structure and the tightness of the limiting structure can be considered.

The middle part of the guide seat 13 forms a guide channel 132, and the inner wall surface at the upper end of the guide channel 132 gradually and smoothly extends outwards to form a guide surface 133 which can be connected with the inner bottom wall at the water inlet 23 of the spray arm 2. The outer edge of the diversion surface 133 is level with the inner bottom wall of the spray arm 2 in the floating state, and the outer edge of the diversion surface 133 is higher than the inner bottom wall of the spray arm 2 in the sinking state. By adopting the structure, the tightness between the diversion seat 13 and the water inlet 23 of the spray arm 2 is improved, and the fluid on the wall leaks.

As shown in fig. 3 and 4, the inner top wall of the spray arm 2 is provided with a plug bush 27 which can be rotatably plugged with the upper end of the power output shaft 311, and the limit structure 200 is a matching structure of protrusions and grooves arranged on the plug bush 27 and the power output shaft 311. Specifically, as shown in fig. 9 and 10, a plurality of ribs 271 extending vertically are provided on the inner wall of the plug bush 27 along the circumferential direction, a clamping groove 272 is formed between adjacent ribs 271, and correspondingly, a bump 3111 capable of being inserted into the clamping groove 272 from bottom to top along with the upward floating of the spray arm 2 to form circumferential limit is provided on the outer circumferential wall of the upper portion of the power output shaft 311. The width of the upper portion of the projection 3111 is gradually reduced from bottom to top to form a guide tip 3112. This structure facilitates insertion of the projection 3111 into the card slot 272 in the floating state of the shower arm 2.

The cleaning method using the cleaning machine in this embodiment is as follows:

(1) Steam pre-wash

The spray arm 2 sinks under the action of dead weight, and the spray arm 2 in a sinking state is connected with the power output shaft 311 of the water pumping mechanism 3 to generate limit in the circumferential direction; the steam generator 4 inputs steam into the spray arm 2 through the air guide channel 310, the water pumping mechanism 3 operates, the power output shaft 311 rotates positively to drive the spray arm 2 to rotate, the rotating speed of the power output shaft is 60n/min, and therefore the steam in the spray arm 2 is conveyed into the box 1 from bottom to top, and steam pre-washing is carried out on tableware;

(2) Washing with water

Water is fed into the box body 1, and water feeding is stopped after the water feeding amount reaches the requirement;

the water pumping mechanism 3 operates to pump water at the bottom of the box body 1 into the spray arm 2, and the water in the spray arm 2 gives upward force to the spray arm 2 so as to lift the spray arm 2, and the spray arm 2 in an upward floating state is decoupled from the power output shaft 311 of the water pumping mechanism 3; the power output shaft 311 of the water pumping mechanism 3 continues to pump water in the spray arm 2 in the forward direction, the spray arm 2 jets water upwards in the form of a water column, tableware is washed with water, and in the process, the spray arm 2 rotates under the action of viscous force of water flow.

In the description and claims of the present invention, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the invention may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims (17)

1. The cleaning method of the cleaning machine comprises a box body (1), a spray arm (2) and a water pumping mechanism (3), wherein the spray arm (2) is arranged in the box body (1) and is close to the bottom, the water pumping mechanism (3) is used for pumping water at the bottom of the box body (1) into the spray arm (2), and a power output shaft (311) of the water pumping mechanism (3) penetrates through the box body (1) and stretches into the spray arm (2); the method is characterized in that: the spray arm (2) can be restrained in the box body (1) in a vertically floating mode, and the cleaning method comprises the following steps of:

(1) Steam pre-wash

The spray arm (2) sinks under the action of dead weight, and the spray arm (2) in a sinking state is connected with a power output shaft (311) of the water pumping mechanism (3) to generate limit in the circumferential direction; steam is input into the spray arm (2), the water pumping mechanism (3) operates, and the power output shaft (311) drives the spray arm (2) to rotate, so that the steam in the spray arm (2) is conveyed into the box body (1) from bottom to top, and steam pre-washing is carried out on tableware;

(2) Washing with water

Water is fed into the box body (1), and water feeding is stopped after the water feeding amount reaches the requirement;

the water pumping mechanism (3) operates, water at the bottom of the box body (1) is pumped into the spray arm (2), the water in the spray arm (2) gives upward force to the spray arm (2) so as to lift the spray arm (2), and the spray arm (2) in an upward floating state is decoupled from the power output shaft (311) of the water pumping mechanism (3); the power output shaft (311) of the water pumping mechanism (3) continuously rotates to pump water into the spray arm (2), and the spray arm (2) upwards shoots the water in a water column mode to wash tableware.

2. The cleaning method of a cleaning machine according to claim 1, characterized in that: in the steam pre-washing state, the rotating speed of the power output shaft (311) is 20-100 n/min.

3. The cleaning method of the cleaning machine according to claim 2, characterized in that: in the steam pre-washing and water washing state, the rotation direction of the power output shaft (311) is consistent.

4. The cleaning method of a cleaning machine according to claim 1, characterized in that: and a limiting structure (200) which can limit the power output shaft (311) and the submerged spray arm (2) and release the limit with the floating spray arm (2) is arranged on the power output shaft (311) and/or the spray arm (2) of the water pumping mechanism (3).

5. The cleaning method of a cleaning machine according to claim 4, wherein: the inner top wall of the spray arm (2) is provided with a plug bush (27) which can be rotationally plugged with the upper end of the power output shaft (311), and the limiting structure (200) is a matching structure of a protrusion and a groove arranged on the plug bush (27) and the power output shaft (311).

6. The cleaning method of a cleaning machine according to claim 5, characterized in that: a plurality of vertically extending convex ribs (271) are arranged on the inner wall of the plug bush (27) along the circumferential direction, clamping grooves (272) are formed between every two adjacent convex ribs (271), and correspondingly, protruding blocks (3111) which can be inserted into the clamping grooves (272) from bottom to top along with the upward floatation of the spray arm (2) and form circumferential limit with the spraying arm are arranged on the outer circumferential wall of the upper portion of the power output shaft (311).

7. The cleaning method of a cleaning machine according to claim 6, wherein: the width of the upper part of the protruding block (3111) gradually decreases from bottom to top to form a guiding tip (3112).

8. The cleaning method of a cleaning machine according to any one of claims 1 to 7, characterized in that: the cleaning machine also comprises a steam generator (4), wherein the steam output end of the steam generator (4) is communicated with the spray arm (2), an air guide channel (310) is formed in the power output shaft (311), and the steam output end of the steam generator (4) is communicated with the air guide channel (310).

9. The cleaning method of the cleaning machine according to claim 8, characterized in that: the top wall of the spray arm (2) is provided with a first spray hole (24), the spray arm (2) is provided with an air collection cavity (25) which is positioned at the upstream of the first spray hole (24) and used for conveying air to the direction of the first spray hole (24) along the fluid circulation direction, and the upper port of the power output shaft (311) is communicated with the air collection cavity (25).

10. The cleaning method of a cleaning machine according to claim 9, characterized in that: the spray arm (2) comprises a body (2 a) and a top plate (2 b) arranged above the body (2 a), the body (2 a) is provided with a flow channel (21) extending along the length direction of the body (2 a), the top plate (2 b) and the top wall of the body (2 a) enclose an air collection cavity (25) together, a second spray hole (26) communicated with the flow channel (21) and positioned in the air collection cavity (25) is formed in the top wall of the body (2 a), the first spray hole (24) is formed in the top plate (2 b) and corresponds to the second spray hole (26), and a gap (200) is formed between the first spray hole (24) and the second spray hole (26).

11. The cleaning method of a cleaning machine according to claim 10, characterized in that: the top plate (2 b) is provided with a first nozzle (241) extending along the axial direction of the first spray hole (24), and correspondingly, the top wall of the body (2 a) is provided with a second nozzle (261) extending upwards from the edge of the second spray hole (26).

12. The cleaning method of the cleaning machine according to claim 8, characterized in that: in the steam pre-washing stage, steam generated by the steam generator (4) is conveyed into the spray arm (2) through an air guide channel (310) of a power output shaft (311) on the water pumping mechanism (3).

13. The cleaning method of the cleaning machine according to claim 8, characterized in that: in the washing stage, air is input into the water jet flow through an air guide channel (310) of a power output shaft (311) and an air collecting cavity (25), so that bubbles are entrained in the water jet flow, and the stripping degree of dirt on the surfaces of the dishes is improved by cavitation.

14. The cleaning method of a cleaning machine according to any one of claims 1 to 7, characterized in that: the box body (1) is internally provided with a flow guide seat (13) positioned at the bottom, the top of the flow guide seat (13) is provided with a clamping ring (131), and the bottom of the spray arm (2) can be restrained on the clamping ring (131) in a vertically floating mode.

15. The cleaning method of a cleaning machine according to claim 14, wherein: the bottom wall of the spray arm (2) is provided with a water inlet (23) and a guide sleeve (231) extending downwards along the water inlet (23), the lower end of the guide sleeve (231) penetrates through an assembly port (1311) on the clamping ring (131) to be arranged, the lower edge of the guide sleeve is provided with a clamping foot (2311) propped against the bottom wall of the clamping ring (131), and in an assembled state, the guide sleeve (231) is restrained from moving up and down by the height difference between the clamping ring (131) and the bottom wall of the spray arm (2).

16. The cleaning method of a cleaning machine according to claim 15, wherein: the middle part of the flow guide seat (13) forms a flow guide channel (132), and the inner wall surface at the upper end of the flow guide channel (132) gradually and smoothly extends outwards to form a flow guide surface (133) which can be connected with the inner bottom wall at the water inlet (23) of the spray arm (2).

17. The cleaning method of a cleaning machine according to claim 16, wherein: the outer edge of the guide surface (133) is level with the inner bottom wall of the spray arm (2) in a floating state, and the outer edge of the guide surface (133) is higher than the inner bottom wall of the spray arm (2) in a sinking state.

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