Cleaning machine and cleaning method

Abstract

The invention relates to a cleaning machine and a cleaning method.The cleaning machine comprises a box body, a water pump, a lower spraying arm, an upper spraying arm and an inner water pipe, the lower spraying arm is arranged at the top of the water pump and communicates with a first water outlet of the water pump, and the lower end of the inner water pipe communicates with a second water outlet of the water pump; the inner water pipe extends upwards, the upper end of the inner water pipe is connected with an upper spraying arm located on the upper middle portion of the box body, an integrated water feeding flow channel is formed in the position, corresponding to the lower middle portion of the box body, of the inner water pipe, and the upper end of the water feeding flow channel of the inner water pipe is divided into a first water feeding flow channel and a second water feeding flow channel which are arranged side by side. The first water supply flow channel continues to extend upwards and supplies water to the upper spraying arm, and the upper end of the second water supply flow channel is connected with a back spraying arm capable of spraying from the side portion of the box body to the middle lower portion of the box body. The position, close to the upper end, of the second water conveying flow channel communicates with the first water conveying flow channel, and an adjusting mechanism for controlling the water passing amount between the first water conveying flow channel and the second water conveying flow channel is arranged at the communicating position.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a washing machine for washing tableware, fruits and vegetables. Background Art

[0002] As people's living standards continue to improve, dishwashers, as a kitchen appliance, are entering more and more households.

[0003] The applicant's prior application CN202011629756.4 "A water flow system and a cleaning machine using the water flow system" discloses a structure using an open water pump and a water flow system, which includes a spray device and a pump for supplying water to the spray device. The spray device includes a bottom spray arm, a middle spray arm, and a top spray arm. The pump includes an upper impeller, a lower impeller, an upper shell, and a lower shell. The upper shell has a first accommodating cavity for installing the upper part of the first blade, and the upper part of the lower shell has a first accommodating cavity for installing the upper part of the first blade. A second accommodating chamber is provided at the lower part of the first blade, and a first water inlet is provided on the side wall of the lower shell body for supplying water into the second accommodating chamber. The lower part of the lower shell body has a third accommodating chamber for installing the lower impeller, and a second water inlet and a water outlet are provided on the side wall and / or the bottom wall of the lower shell body; the middle spray arm and the top spray arm are both supplied with water through an inner water pipe extending upward close to the inner wall of the washing chamber. Since the cavity at the lower part of the washing chamber is usually used as the main washing chamber, a back spray arm connected to the inner water pipe is also provided on the inner wall of the lower part of the washing chamber.

[0004] The power of the two water flows in the above-mentioned washing machine structure is independently supplied by the corresponding pumps, which increases the head and water flow of each water flow, and is conducive to improving the cleaning effect. However, since the internal water pipe divides the upward water flow into two paths, one for the middle spray arm and the top spray arm, and the other for the back spray arm, the flow cannot be distributed between the two water supply paths, and due to the influence of the upward resistance of the middle spray arm and the top spray arm, the back spray force may be strong, and the middle and top spray forces may be seriously insufficient, resulting in poor washing effect when the upper part of the washing chamber also needs to bear a large number of sets of tableware.

[0005] Therefore, for the current cleaning machine structure, further improvement needs to be made. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a cleaning machine capable of allocating the upstream flow rate on demand so as to improve the washing effect of each area in view of the current status of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a cleaning method using the above-mentioned cleaning machine in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve the above technical problems is:

[0009] A cleaning machine comprises a box, a water pump, a lower spray arm, an upper spray arm and an inner water pipe, wherein a concave water return area is arranged at the bottom of the box, the water pump is arranged in the water return area and is connected with the water return area, the lower spray arm is arranged at the top of the water pump and is connected with a first water outlet of the water pump, the lower end of the inner water pipe is connected with a second water outlet of the water pump, the inner water pipe extends upward and its upper end is connected with the upper spray arm located in the middle and upper part of the box, and the inner water pipe is formed at the middle and lower part of the box corresponding to the inner water pipe. The inner water pipe is divided into a first water supply channel and a second water supply channel arranged side by side at the upper end of the water supply channel. The first water supply channel continues to extend upward and supplies water to the upper spray arm. The upper end of the second water supply channel is connected to a back spray arm that can spray from the side of the box body to the middle and lower part of the box body. The second water supply channel is connected to the first water supply channel near its upper end and an adjusting mechanism for controlling the amount of water flowing between the first water supply channel and the second water supply channel is provided at the connecting portion.

[0010] Preferably, the change trend of the water flow area of ​​the first water supply channel is opposite to the change trend of the water flow area of ​​the corresponding second water supply channel. Using such a flow distribution method is conducive to more rapid and effective flow distribution on demand.

[0011] Preferably, the upper end of the second water supply channel is provided with a laterally extending flow distribution chamber, the top of the flow distribution chamber is provided with a water outlet connected to the back spray arm, and the side is provided with an opening connected to the side of the first water supply channel, and the regulating mechanism is provided in the flow distribution chamber and its water pressure sensing end is located in the first water supply channel, and is used to drive the regulating mechanism to control the opening size of the second water supply channel according to the water pressure in the first water supply channel. With the above structure, the regulating mechanism is used to sense the water pressure of the first water supply channel to adjust the opening size of the second water supply channel, thereby realizing the on-demand distribution of water flow in the first water supply channel and the second water supply channel.

[0012] Preferably, a flushing port is provided at the bottom of the flow distribution chamber, which is located beside the regulating mechanism and is used for partially flushing the washing chamber. At least part of the regulating mechanism is movably arranged in the flow distribution chamber, and the flushing port is closed as the opening of the second water supply channel increases, and is opened as the opening of the second water supply channel decreases. The flushing port is provided so that when the back spray arm does not supply water in a very small amount or does not supply water, the flushing port can be used to provide side spraying to the middle and lower part of the washing chamber, thereby improving the local cleaning effect and the slag collection effect.

[0013] Preferably, the adjustment mechanism comprises:

[0014] The baffle, the flow distribution chamber and the second water supply channel below it form a T-shaped structure, the first end of the transverse part of the T-shaped structure is open to form the opening, the second end of the T-shaped structure is closed, the bottom wall of the T-shaped structure near the second end portion forms a support, the baffle can be laterally moved on the support and at least partially covers the upper end of the second water supply channel;

[0015] The water pressure sensor is rotatably arranged at the opening and keeps the opening closed all the time. The water pressure sensor end is arranged at the side of the water pressure sensor and drives the water pressure sensor to rotate as the water pressure changes.

[0016] The first elastic member has a first end connected to the water pressure sensor and a second end connected to the baffle, and is used to control the lateral reciprocating movement of the baffle as the water pressure sensor rotates, thereby controlling the opening size of the second water supply channel.

[0017] With the above structure, when the water pressure in the first water supply channel is very high, the water pressure sensing end drives the water pressure sensing element to rotate under the action of the water pressure, and then drives the baffle to increase the opening of the upper port of the second water supply channel through the first elastic element. At this time, the water flow rate in the second water supply channel increases, and the water flow rate in the first water supply channel naturally decreases accordingly, thereby realizing adaptive regulation of the flow rates of the two.

[0018] Preferably, the adjustment mechanism further comprises a second elastic member, the upper surface of the baffle is provided with a limit column extending upward, the second elastic member is sleeved on the outer periphery of the limit column and the upper end cooperates with the top wall of the transverse part of the T-shaped structure so that the lower surface of the baffle is always close to the bottom wall of the transverse part of the T-shaped structure. The above structure can make the baffle always stably abut against the support platform, so that it can always stably control the opening of the upper port of the second water supply channel.

[0019] Preferably, a transversely arranged sliding plate is provided at the upper end of the limiting column, and the upper surface of the sliding plate abuts against and slides against the top wall of the transverse part of the T-shaped structure. The above structure increases the matching surface between the upper end of the limiting column and the top wall of the flow distribution cavity to improve the matching stability and reliability, and the sliding plate can also limit the upper end of the second elastic member.

[0020] Preferably, the first elastic member is a torsion spring, which includes a spring body located in the center and a first torsion arm and a second torsion arm connected to both ends of the spring body, the first torsion arm is connected to the water pressure sensor, and the second torsion arm is connected to the lower part of the limit rod. This structure facilitates the conversion of the rotation of the water pressure sensor into the lateral movement of the baffle, thereby utilizing the rotation of the water pressure sensor to drive the baffle to move laterally.

[0021] Preferably, the water pressure sensor comprises a cylindrical main body and a lever arm extending radially outward from the side wall of the main body, the central part of the main body is rotatably connected to the side wall of the flow distribution chamber through a rotating shaft, the outer side wall of the main body blocks the opening, and the lever arm constitutes the pressure sensing end. The above structure can convert the water pressure into the rotation trajectory of the water pressure sensor to further drive the baffle to move.

[0022] Preferably, the bottom wall of the transverse part of the T-shaped structure forms a downwardly concave arc groove near the opening, the bottom of the main body part is rotatably arranged in the arc groove, the connection between the pressure sensing end and the main body part is located above the arc groove, and the free end of the pressure sensing end extends obliquely downward from the arc groove in the first water supply channel. The above structure is conducive to improving the sealing effect of the water pressure sensor on the opening and improving the rotation stability of the water pressure sensor.

[0023] Preferably, a foot is formed at the upper edge of the opening and is arranged obliquely from top to bottom outward from the first water supply channel, a block is protruded from the upper part of the outer periphery of the main body, the block is accommodated in the flow distribution cavity and abuts against the outer side of the foot, and the lower edge of the foot is rotatably matched with the outer peripheral wall of the main body. The above structure can reliably constrain the water pressure sensor in the flow distribution cavity and reliably seal the opening.

[0024] Preferably, the flushing port is opened on the support platform, and the baffle moves outward on the support platform as the opening of the upper port of the second water supply channel increases to cover the flushing port, and moves inward on the support platform as the opening of the upper port of the second water supply channel decreases to open the flushing port. With the above structure, the opening and closing of the flushing port are linked with the adjustment mechanism to facilitate the control of its opening and closing, and the opening and closing of the flushing port is changed accordingly with the amount of spray water in the back spray arm, so as to maximize the cleaning effect under various cleaning conditions.

[0025] A cleaning method of a cleaning machine:

[0026] (1) When the number of dishes M in the lower part of the washing chamber is greater than the number of dishes N in the upper part of the washing chamber;

[0027] The regulating mechanism reduces the water flow rate of the first water supply channel and increases the water flow rate of the second water supply channel. The tableware in the lower part of the washing chamber is sprayed and cleaned from bottom to top by the lower spray arm, and at the same time is flushed by the large flow rate from the back spray arm; the tableware in the upper part of the washing chamber is sprayed and cleaned by the small flow rate of the upper spray arm;

[0028] (2) When the number of dishes in the lower part of the washing chamber M ≤ the number of dishes in the upper part of the washing chamber N;

[0029] The regulating mechanism reduces or closes the water supply flow of the second water supply channel and increases the water supply flow of the first water supply channel. The tableware in the lower part of the washing chamber is sprayed and cleaned from bottom to top by the lower spray arm; the tableware in the upper part of the washing chamber is sprayed and cleaned with a large flow rate by the upper spray arm.

[0030] In the present invention, as an improved solution, a pulsating cleaning mode for the back spray arm and the rinse port can also be provided. By adjusting the power of the water pump (controlling the speed of the water pump motor) to control the output flow and pressure of the water pump, the flow and pressure in the first water supply channel fluctuate within a set range (that is, the flow and pressure change alternately), so that the upper port of the second water supply channel is switched between an open state and a closed state, so that the upper spray arm can maintain the process of spraying water all the time, and the back spray arm and the rinse port can perform pulse spraying to improve the overall cleaning effect. This cleaning condition is particularly suitable for the situation where a large number of tableware are placed on the upper and lower parts of the washing chamber.

[0031] Compared with the prior art, the advantages of the present invention are: the present invention utilizes an adjusting mechanism to sense the water pressure of the first water supply channel and thereby adjusts the opening size of the second water supply channel, thereby realizing on-demand distribution of water flow in the first water supply channel and the second water supply channel. When it is necessary to increase the water supply of the upper spray arm, the water supply of the first water supply channel can be increased. At this time, the second water supply channel is in a minimum flow state (it can be completely cut off); when the back spray arm is required to provide a powerful side flush, the water flow area of ​​the second water supply channel can be increased. At this time, the back spray arm is in a partially open or fully open state, thereby controlling the upper spray and side spray flow rates according to actual needs to improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a partial structural schematic diagram of an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A partial cross-sectional view of

[0034] Figure 3 for Figure 2 A partial enlarged view (adjustment mechanism part). DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 3As shown, the cleaning machine of this embodiment includes a housing 1, a water pump 2, a lower spray arm 3, an upper spray arm 4 and an inner water pipe 5. A concave water return area 11 is provided at the bottom of the housing 1, and a filter plate 12 covers the top of the water return area 11. The water pump 2 is arranged in the water return area 11 and is connected to the water return area 11. A water suction port is provided at the bottom of the water pump 2, a first water outlet exposed above the filter plate 12 is provided at the top, and a second water outlet located in the water return area 11 is provided at the side.

[0037] The lower spray arm 3 is arranged at the top of the water pump 2 and is connected to the first water outlet of the water pump 2. The lower end of the inner water pipe 5 is connected to the second water outlet of the water pump 2. The inner water pipe 5 extends upward and its upper end is connected to the upper spray arm 4 located in the middle and upper part of the box body 1. The inner water pipe 5 forms an integrated water delivery channel 50 corresponding to the middle and lower part of the box body 1. The inner water pipe 5 is arranged at the upper end of the water delivery channel 50 corresponding to the middle part of the lower washing chamber. The inner water pipe 5 is divided into The first water supply channel 51 and the second water supply channel 52 are arranged side by side, the first water supply channel 51 continues to extend upward and supplies water to the upper spray arm 4, the upper end of the second water supply channel 52 is connected to the back spray arm 7 that can spray from the side of the box body 1 to the middle and lower part of the box body 1, the second water supply channel 52 is connected to the first water supply channel 51 near its upper end, and a regulating mechanism 6 for controlling the amount of water flowing between the first water supply channel 51 and the second water supply channel 52 is provided at the connecting point.

[0038] The variation trend of the water flow area of ​​the first water supply channel 51 is opposite to that of the corresponding second water supply channel 52. Such a flow distribution method is conducive to more rapid and effective flow distribution on demand.

[0039] The upper end of the second water supply channel 52 is provided with a flow distribution chamber 60 extending laterally, the top of the flow distribution chamber 60 is provided with a water outlet 601 connected to the back spray arm 7, and the side is provided with an opening 602 connected to the side of the first water supply channel 51, and the regulating mechanism 6 is provided in the flow distribution chamber 60 and its water pressure sensing end 621 is located in the first water supply channel 51, and is used to drive the regulating mechanism 6 to control the opening size of the second water supply channel 52 according to the water pressure in the first water supply channel 51. With the above structure, the regulating mechanism 6 senses the water pressure of the first water supply channel 51 to adjust the opening size of the second water supply channel 52, thereby realizing the on-demand distribution of the water flow in the first water supply channel 51 and the second water supply channel 52.

[0040] The bottom of the flow distribution chamber 60 is also provided with a flushing port 603 beside the position adjustment mechanism 6 for local flushing of the washing chamber. A rotatable or fixed direct spray or cleaning spray nozzle can be provided at the flushing port 603 as required. At least part of the adjustment mechanism 6 is movably arranged in the flow distribution chamber 60, and the flushing port 603 is closed as the opening of the second water supply channel 52 increases, and the flushing port 603 is opened as the opening of the second water supply channel 52 decreases. The flushing port 603 is provided, and when the back spray arm 7 does not supply water in a very small amount or does not supply water, the flushing port 603 can be used to provide side spraying to the middle and lower part of the washing chamber, thereby improving the local cleaning effect and the slag collection effect.

[0041] The regulating mechanism 6 comprises:

[0042] The baffle 61, the flow distribution cavity 60 and the second water supply channel 52 below it form a T-shaped structure, the first end of the transverse part of the T-shaped structure is open to form an opening 602, the second end of the T-shaped structure is closed, and the bottom wall of the T-shaped structure near the second end portion forms a support platform 605, and the baffle 61 can be laterally moved and arranged on the support platform 605 and at least partially covers the upper end of the second water supply channel 52;

[0043] The water pressure sensor 62 is rotatably disposed at the opening 602 and keeps the opening 602 closed at all times. The water pressure sensor end 621 is disposed at the side of the water pressure sensor 62 and drives the water pressure sensor 62 to rotate as the water pressure changes.

[0044] The first elastic member 63 has a first end connected to the water pressure sensor 62 and a second end connected to the baffle 61 , and is used to control the lateral reciprocating movement of the baffle 61 as the water pressure sensor 62 rotates, thereby controlling the opening size of the second water supply channel 52 .

[0045] With the above structure, when the water pressure in the first water supply channel 51 is very high, the water pressure sensing end 621 drives the water pressure sensing element 62 to rotate under the action of the water pressure, and then drives the baffle 61 through the first elastic element 63 to increase the opening of the upper port of the second water supply channel 52. At this time, the water flow in the second water supply channel 52 increases, and the water flow in the first water supply channel 51 naturally decreases accordingly, thereby realizing adaptive regulation of the flow rates of the two.

[0046] The adjustment mechanism 6 also includes a second elastic member 64. The upper surface of the baffle 61 is provided with a limit column 611 extending upward. The second elastic member 64 (a linear spring) is sleeved on the outer periphery of the limit column 611 and the upper end cooperates with the top wall of the transverse part of the T-shaped structure so that the lower surface of the baffle 61 is always close to the bottom wall of the transverse part of the T-shaped structure. The above structure can make the baffle 61 always stably against the support platform, so that it can always stably control the opening of the upper port of the second water supply channel 52.

[0047] The upper end of the limiting column 611 is provided with a laterally arranged sliding piece 65, the upper surface of which abuts against and slides against the top wall of the transverse portion of the T-shaped structure. The above structure increases the matching surface between the upper end of the limiting column 611 and the top wall of the flow distribution chamber 60 to improve matching stability and reliability, and the sliding piece 65 can also limit the upper end of the second elastic member.

[0048] The first elastic member 63 is a torsion spring, which includes a spring body 633 located in the center and a first torsion arm 631 and a second torsion arm 632 connected to both ends of the spring body 633. The first torsion arm is connected to the water pressure sensor 62, and the second torsion arm is connected to the lower part of the limit rod. This structure is convenient for converting the rotation of the water pressure sensor 62 into the lateral movement of the baffle 61, so that the rotation of the water pressure sensor 62 drives the baffle 61 to move lateral.

[0049] The water pressure sensor 62 includes a cylindrical main body 622 and a lever arm extending radially outward from the side wall of the main body 622. The central part of the main body 622 is rotatably connected to the side wall of the flow distribution chamber 60 through a rotating shaft 623. The outer side wall of the main body 622 blocks the opening 602, and the lever arm constitutes a pressure sensing end 621. The above structure can convert the water pressure into the rotation trajectory of the water pressure sensor 62 to further drive the baffle 61 to move.

[0050] The bottom wall of the transverse part of the T-shaped structure forms a downwardly concave arc groove 606 near the opening 602, the bottom of the main body 622 is rotatably arranged in the arc groove 606, the connection between the pressure sensing end 621 and the main body 622 is located above the arc groove 606, and the free end of the pressure sensing end 621 extends obliquely downward from the arc groove 606 in the first water supply channel 51. The above structure is conducive to improving the sealing effect of the water pressure sensor 62 on the opening and improving the rotation stability of the water pressure sensor 62.

[0051] A foot 607 is formed at the upper edge of the opening 602 and is arranged obliquely from top to bottom outward from the first water delivery channel 51. A block 624 is protruded from the upper part of the outer periphery of the main body 622. The block 624 is accommodated in the flow distribution cavity 60 and abuts against the outer side of the foot 607. The lower edge of the foot 607 is rotatably matched with the outer peripheral wall of the main body 622. The above structure can reliably constrain the water pressure sensor in the flow distribution cavity 60 and reliably seal the opening.

[0052] The flushing port 603 is provided on the support platform 605, and the baffle 61 moves outward on the support platform 605 as the opening of the upper port of the second water supply channel 52 increases, thereby covering the flushing port 603, and moves inward on the support platform 605 as the opening of the upper port of the second water supply channel 52 decreases, thereby opening the flushing port 603. With the above structure, the opening and closing of the flushing port 603 are linked with the adjustment mechanism 6, so as to facilitate the control of its opening and closing, and the opening and closing of the flushing port is changed accordingly with the amount of spray water in the back spray arm 7, so as to maximize the cleaning effect under various cleaning conditions.

[0053] The cleaning method of the cleaning machine of this embodiment:

[0054] (1) When the number of dishes M in the lower part of the washing chamber is greater than the number of dishes N in the upper part of the washing chamber;

[0055] The regulating mechanism 6 reduces the water flow rate of the first water supply channel 51 and increases the water flow rate of the second water supply channel 52. The tableware in the lower part of the washing chamber is sprayed and cleaned from bottom to top by the lower spray arm, and at the same time is flushed by the large flow rate from the back spray arm; the tableware in the upper part of the washing chamber is sprayed and cleaned by the small flow rate of the upper spray arm;

[0056] (2) When the number of dishes in the lower part of the washing chamber M ≤ the number of dishes in the upper part of the washing chamber N;

[0057] The regulating mechanism 6 reduces or closes the water supply flow of the second water supply channel 52 and increases the water supply flow of the first water supply channel 51. The tableware in the lower part of the washing chamber is sprayed and cleaned from bottom to top by the lower spray arm; the tableware in the upper part of the washing chamber is sprayed and cleaned with a large flow rate by the upper spray arm.

[0058] In this embodiment, as an improvement scheme, a pulsating cleaning mode of the back spray arm 7 and the flushing port 603 can also be provided. By adjusting the power of the water pump (controlling the speed of the water pump motor) to control the output flow and pressure of the water pump, the flow and pressure in the first water supply channel 51 fluctuate within a set range (that is, the flow and pressure change alternately), so that the upper port of the second water supply channel 52 is switched between an open state and a closed state, and then the upper spray arm can maintain the process of spraying water at all times, while the back spray arm 7 and the flushing port 603 can perform pulse spraying to improve the overall cleaning effect. This cleaning condition is particularly suitable for the situation where a large number of tableware are placed on the upper and lower parts of the washing chamber.

[0059] This embodiment utilizes the regulating mechanism 6 to sense the water pressure of the first water supply channel and thereby adjust the opening size of the second water supply channel, thereby realizing the on-demand distribution of the water flow in the first water supply channel and the second water supply channel. When it is necessary to increase the water supply of the upper spray arm, the water supply of the first water supply channel 51 can be increased. At this time, the second water supply channel 52 is in a minimum flow state (it can be in a completely cut-off state); when the back spray arm 7 is required to provide a powerful side flush, the water flow area of ​​the second water supply channel 52 can be increased. At this time, the back spray arm 7 is in a partially open or fully open state, thereby controlling the upper spray and side spray flow rates according to actual needs to improve the cleaning effect.

[0060] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning machine, comprising a housing (1), a water pump (2), a lower spray arm (3), an upper spray arm (4) and an inner water pipe (5), wherein a concave water return area (11) is arranged at the bottom of the housing (1), the water pump (2) is arranged in the water return area (11) and is connected to the water return area (11), the lower spray arm (3) is arranged at the top of the water pump (2) and is connected to a first water outlet of the water pump (2), the lower end of the inner water pipe (5) is connected to a second water outlet of the water pump (2), the inner water pipe (5) extends upward and the upper end thereof is connected to the upper spray arm (4) located in the middle and upper part of the housing (1), characterized in that: The inner water pipe (5) forms an integrated water supply channel (50) at the middle and lower part of the corresponding box body (1); the inner water pipe (5) is divided into a first water supply channel (51) and a second water supply channel (52) arranged side by side at the upper end of the water supply channel (50); the first water supply channel (51) continues to extend upward and supplies water to the upper spray arm (4); the upper end of the second water supply channel (52) is connected to a back spray arm capable of spraying from the side of the box body to the middle and lower part of the box body; the second water supply channel (52) is connected to the first water supply channel (51) near its upper end, and a regulating mechanism (6) for controlling the amount of water flowing between the first water supply channel (51) and the second water supply channel (52) is provided at the connection point.

2. The cleaning machine according to claim 1, characterized in that: The variation trend of the water flow area size of the first water supply channel (51) is opposite to the variation trend of the water flow area size of the corresponding second water supply channel (52).

3. The cleaning machine according to claim 1, characterized in that: The upper end of the second water supply channel (52) is provided with a transversely extending flow distribution chamber (60), the top of the flow distribution chamber (60) is provided with a water outlet connected to the back spray arm, and the side is provided with an opening connected to the side of the first water supply channel (51), the regulating mechanism (6) is arranged in the flow distribution chamber (60) and its water pressure sensing end is located in the first water supply channel (51), and is used to drive the regulating mechanism (6) to control the opening size of the second water supply channel (52) according to the water pressure in the first water supply channel (51).

4. The cleaning machine according to claim 3, characterized in that: The bottom of the flow distribution chamber (60) is also provided with a flushing port next to the position regulating mechanism (6) for locally flushing the washing chamber. At least part of the regulating mechanism (6) is movably arranged in the flow distribution chamber (60), and the flushing port is closed as the opening of the second water supply channel (52) increases, and is opened as the opening of the second water supply channel (52) decreases.

5. The cleaning machine according to claim 4, characterized in that: The regulating mechanism (6) comprises The baffle (61) is a T-shaped structure formed by the flow distribution cavity (60) and the second water supply channel (52) below it. The first end of the transverse part of the T-shaped structure is open to form the opening, and the second end of the T-shaped structure is closed. The bottom wall of the T-shaped structure near the second end forms a support platform. The baffle (61) is arranged on the support platform so as to be laterally movable and at least partially covers the upper end of the second water supply channel (52). A water pressure sensor (62) is rotatably arranged at the opening and keeps the opening always closed. The water pressure sensor end is arranged at the side of the water pressure sensor (62) and drives the water pressure sensor (62) to rotate as the water pressure changes. A first elastic member (63) has a first end connected to the water pressure sensor (62) and a second end connected to the baffle (61), and is used to control the baffle (61) to move back and forth horizontally as the water pressure sensor (62) rotates, thereby controlling the opening size of the second water supply channel (52).

6. The cleaning machine according to claim 5, characterized in that: The adjustment mechanism (6) further comprises a second elastic member (64), the upper surface of the baffle (61) is provided with a limiting column extending upward, the second elastic member (64) is sleeved on the outer periphery of the limiting column and the upper end cooperates with the top wall of the transverse part of the T-shaped structure so that the lower surface of the baffle (61) is always close to the bottom wall of the transverse part of the T-shaped structure.

7. The cleaning machine according to claim 6, characterized in that: The upper end of the limiting column is provided with a transversely arranged sliding plate (65), the upper surface of the sliding plate (65) abuts against and slidably fits against the top wall of the transverse part of the T-shaped structure.

8. The cleaning machine according to claim 6, characterized in that: The first elastic member (63) is a torsion spring, which includes a spring body located in the center and a first torsion arm and a second torsion arm connected to both ends of the spring body. The first torsion arm is connected to the water pressure sensor (62), and the second torsion arm is connected to the lower part of the limit rod.

9. The cleaning machine according to claim 5, characterized in that: The water pressure sensor (62) comprises a cylindrical main body and a lever arm extending radially outward from the side wall of the main body. The central portion of the main body is rotatably connected to the side wall of the flow distribution chamber (60) via a rotating shaft. The outer side wall of the main body blocks the opening, and the lever arm constitutes the pressure sensing end (621).

10. The cleaning machine according to claim 9, characterized in that: The bottom wall of the transverse part of the T-shaped structure forms a downwardly recessed arc groove near the opening, and the bottom of the main body part is rotatably arranged in the arc groove. The connection between the pressure sensing end (621) and the main body part is located above the arc groove, and the free end of the pressure sensing end (621) extends obliquely downward from the arc groove in the first water supply channel (51).

11. The cleaning machine according to claim 9, characterized in that: A foot is formed at the upper edge of the opening and is arranged obliquely from top to bottom outward from the first water supply channel (51); a block is protruding from the upper part of the outer periphery of the main body, and the block is accommodated in the flow distribution cavity (60) and abuts against the outer side of the foot; the lower edge of the foot is rotatably matched with the outer peripheral wall of the main body.

12. The cleaning machine according to any one of claims 5 to 11, characterized in that: The flushing port is opened on the support platform, and the blocking piece (61) moves outward on the support platform as the opening of the upper port of the second water supply channel (52) increases, thereby covering the flushing port, and moves inward on the support platform as the opening of the upper port of the second water supply channel (52) decreases, thereby opening the flushing port.

13. A cleaning method for a cleaning machine, characterized in that: A cleaning machine according to any one of claims 1 to 12 is used; (1) When the number of dishes M in the lower part of the washing chamber is greater than the number of dishes N in the upper part of the washing chamber; The regulating mechanism (6) reduces the water flow rate of the first water supply channel (51) and increases the water flow rate of the second water supply channel (52), so that the tableware in the lower part of the washing chamber is sprayed and cleaned from bottom to top by the lower spray arm (3) and is simultaneously flushed with a large flow rate from the back spray arm (521); the tableware in the upper part of the washing chamber is sprayed and cleaned with a small flow rate by the upper spray arm (4); (2) When the number of dishes in the lower part of the washing chamber M ≤ the number of dishes in the upper part of the washing chamber N; The regulating mechanism (6) reduces or closes the water supply flow rate of the second water supply channel (52) and increases the water supply flow rate of the first water supply channel (51), so that the tableware in the lower part of the washing chamber is sprayed and cleaned from bottom to top by the lower spray arm (3); and the tableware in the upper part of the washing chamber is sprayed and cleaned with a large flow rate by the upper spray arm (4).

Images