CN215383792U - Cleaning machine - Google Patents

Abstract

The utility model relates to a cleaning machine which comprises a box body, a first water outlet component, a second water outlet component and a water pumping mechanism, wherein the first water outlet component is used for providing bottom spraying, the second water outlet component is used for providing upper spraying, the water pumping mechanism comprises a water drawing component and a driving piece, the water drawing component can independently supply water for the first water outlet component and the second water outlet component, the driving piece is used for providing power for the water drawing component, the bottom of the water drawing component is supported on the bottom wall of the box body, a gap is formed between the bottom of the water drawing component and the bottom wall of the box body, the driving piece is arranged on the bottom wall outside the box body, and an output shaft extends into the box body and is connected with the water drawing component. The water pumping mechanism can independently supply water for the first water outlet component and the second water outlet component respectively, so that the problem of mutual competition of two pipelines is avoided, the lift and the water flow of each water flow are improved, and the cleaning effect is improved; the water drawing assembly is supported on the inner bottom wall of the box body, and the driving piece is arranged on the outer bottom wall of the box body, so that the water pumping mechanism is convenient to mount.

Description

Cleaning machine

Technical Field

The utility model relates to a cleaning machine for cleaning dishes, fruits and vegetables.

Background

For table type and cabinet type dish washing machines, because the washing space is large, in order to achieve better washing effect, a top spray arm, a middle spray arm and a lower spray arm are generally designed; when the dishwasher is in operation, the washing pump conveys water to the top, the middle and the lower spray arms through pipelines, the water is sprayed out of the top, the middle spray arms and the lower spray arms and washes tableware and then falls back into a water cup at the bottom of the dishwasher, and the washing pump conveys the fallen water to the top, the middle and the lower spray arms again to complete a cycle.

For example, the chinese utility model patent application publication No. CN106859563A, energy saving dishwasher (application No. CN201611232345.5), discloses a structure including a chamber for accommodating tableware and providing a cleaning space, a spray system for spraying water to clean the tableware, and a pump body for pumping water and supplying water to the spray system; the spraying system is arranged in the cavity; the water pumping end of the pump body is communicated with the cavity, and the water supply end is communicated with the spraying system; the spraying system comprises an inner water pipe and more than two sets of spraying devices, and the more than two sets of spraying devices are respectively arranged on the inner water pipe; the water supply end of the pump body is connected with a water distribution device, the water distribution device is provided with more than two water outlets corresponding to more than two sets of spraying devices, and the spraying devices are communicated with the corresponding water outlets; when the spraying device works, the water distribution device conducts more than one water outlet according to the instruction, so that more than one set of spraying device can perform cleaning work.

In the above-mentioned current dish washer that can carry out bottom and spray, top sprays, a pump for supplying water for the spraying system generally adopts closed structure, is about to locate the spiral case of washing pump in the box below, is provided with ability pivoted impeller in the spiral case, and the water inlet of washing pump spiral case is linked together bottom the washing chamber, and the delivery port of spiral case is connected with the water diversion device, and this water diversion device divides into the first branch road of supplying water to bottom spray arm and the second branch road of supplying water to top spray arm with rivers.

Because the water pressure of the top spraying water and the bottom spraying water is independently supplied by the washing pump, the lift, the flow and the impact force of the water flow on each branch are greatly reduced after the water flow is divided, and the cleaning effect is influenced. In addition, for the open type water pump, the bottom of the volute of the water pump needs to be arranged in the box body, but in the water tank type cleaning machine adopting the open type water pump in the prior art, the water pump needs to be fixed through the flow guide seat, and the water pump cannot be adapted to the installation of the novel water cup volute.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the utility model is to provide a cleaning machine which can respectively provide power for two paths of washing water so as to improve the lift and the water flow and further improve the cleaning effect, aiming at the current situation of the prior art.

The second technical problem to be solved by the utility model is to provide a cleaning machine which is convenient for installing a novel water pump aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving at least one technical problem is as follows: the utility model provides a cleaning machine, includes box, first play water part, second play water part and pump water mechanism, first play water part is located the box lower part, is used for providing the bottom and sprays, the second goes out water part and locates box upper portion, is used for providing upper portion and sprays, pump water mechanism locates the bottom half and is used for first play water part, second play water part water supply, its characterized in that: the water pumping mechanism comprises a water drawing assembly and a driving piece, wherein the water drawing assembly can independently supply water for the first water outlet component and the second water outlet component respectively, the driving piece is used for providing power for the water drawing assembly, the bottom of the water drawing assembly is supported on the bottom wall of the box body, a gap is formed between the bottom of the water drawing assembly and the bottom wall of the box body, the driving piece is arranged on the bottom wall of the box body, and an output shaft extends into the box body and is connected with the water drawing assembly.

In the above scheme, the bottom wall of the box body is provided with an installation opening, the upper end surface of the driving part partially extends upwards to form a boss which can be inserted into the installation opening, the output shaft is located at the central part of the boss, and the bottom of the water drawing assembly is supported on the boss. The driving piece is the motor, utilizes the part of motor upper end to provide the support for drawing the water subassembly, is favorable to simplifying the structure of box diapire, and the production and the assembly of being convenient for also avoid box diapire unevenness's structure to cause harmful effects to the return water effect simultaneously.

Preferably, a positioning block extending upwards is arranged on the upper surface of the boss close to the edge, and the bottom wall of the water drawing assembly abuts against the positioning block so as to restrict a gap between the bottom wall of the water drawing assembly and the bottom wall in the box body. The positioning block at the top of the driving piece is used for supporting the water drawing assembly, so that the structure of the bottom wall of the box body is simplified.

Preferably, a part of the positioning block extends to the outside of the edge of the boss, and a positioning notch matched with the outer edge of the corresponding positioning block so as to circumferentially limit the driving piece is formed on the periphery of the mounting opening. This structure can utilize the locating piece to carry out spacing upwards in circumference to motor and box diapire, the assembly of being convenient for.

Preferably, the upper surface of the boss is further provided with a positioning column extending upwards, and the bottom wall of the water drawing assembly is provided with a positioning sleeve which can be inserted and connected with the positioning column. The matching structures of the positioning columns and the positioning sleeves are three groups, and on the basis that the positioning blocks support the water drawing assembly, the positioning columns and the positioning sleeves can not only further support the water drawing assembly, but also can limit the water drawing assembly in the circumferential direction, so that the assembly is facilitated.

Preferably, the inner bottom wall of the tank body is provided with a threaded column which is located at the periphery of the mounting opening and extends upwards, the outer peripheral wall of the water drawing assembly is provided with a connecting part which can abut against the threaded column, and the connecting part is provided with a mounting hole which is arranged corresponding to the threaded column. After the positioning block support, the positioning column and the positioning sleeve are limited, the mounting hole is just corresponding to the threaded column, and the mounting hole and the threaded column are locked by a screw, so that the reliability of assembly of the water drawing assembly is improved.

In order to facilitate the locking connection of the driving part and the box body, the upper end face of the driving part, which is positioned on the periphery of the boss, is abutted against the outer bottom wall of the box body and is locked and connected through a screw.

Preferably, the inner bottom wall of the box body is provided with a mounting plate arranged around the periphery of the mounting opening, and the screws penetrate through the mounting plate, the bottom wall of the box body and the upper end face of the driving piece to lock and connect the mounting plate, the bottom wall of the box body and the driving piece. This structure is favorable to improving the assembly reliability, and under the state that the assembly finishes, diapire, mounting panel upper surface, boss upper surface in the box roughly remain flush to avoid influencing the smooth and easy nature of return water.

The water drawing assembly of the utility model comprises:

the upper part of the upper impeller is a centrifugal impeller, and the lower part of the upper impeller is an axial-flow impeller;

the lower impeller is a centrifugal impeller;

the upper shell is provided with a first accommodating cavity for mounting the upper part of the upper impeller, the top wall and/or the side wall of the upper shell are/is provided with spray holes communicated with the first accommodating cavity in a fluid mode, and the upper shell forms the first water outlet component; and

the lower casing, connect in the below of last casing, the upper portion of casing has the second holding chamber that is used for installing the impeller lower part down, it has the first water inlet that supplies water to get into in the second holding chamber to open on the lateral wall of casing down, the lower part of casing has the third holding chamber that is used for installing impeller down, it has the second water inlet that supplies water to get into in the third holding chamber to open on the diapire of casing down, it has the delivery port that supplies water to export from the third holding chamber to open on the lateral wall of casing down.

The structure forms an open type double-pump system, wherein the second accommodating cavity, the first accommodating cavity and the upper impeller which are positioned on the upper part spray water for the bottom, the third accommodating cavity and the lower impeller which are positioned on the lower part spray water for the top and/or the middle, the same power source is adopted, and because the power of two paths of water flow is independently supplied by the corresponding pump, the lift and the water flow of each path of water flow are improved, and the cleaning effect is favorably improved.

The box bottom wall is locally recessed to form a first containing groove used for installing a lower shell, a water guide pipeline tangentially connected with a third containing cavity is connected to a water outlet of the lower shell, a water passing port for communicating the water guide pipeline with fluid of a second water outlet component is formed in the side wall of the first containing groove, and the distance between the outer peripheral wall of the lower shell and the inner wall of the first containing groove is 3-10 mm in the assembled state.

Compared with the prior art, the utility model has the advantages that: the water pumping mechanism can independently supply water for the first water outlet component and the second water outlet component respectively, so that the problem of mutual competition of two pipelines is avoided, the lift and the water flow of each water flow are improved, and the cleaning effect is improved; the water drawing assembly is supported on the inner bottom wall of the box body, and the driving piece is arranged on the outer bottom wall of the box body, so that the water pumping mechanism is convenient to mount.

Drawings

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

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of an assembly structure of the bottom of the tank and a part of the water drawing assembly according to an embodiment of the present invention;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic structural diagram of a lower housing according to an embodiment of the present invention;

fig. 8 is an assembly structure view of the lower housing and the suction nozzle in the embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 8, the cleaning machine of the present embodiment includes a box 6, a first water outlet member, a second water outlet member b and a water pumping mechanism a, wherein the first water outlet member is disposed at a lower portion of the box 6 and used for providing bottom spraying, the second water outlet member b is disposed at an upper portion of the box 6 and used for providing upper spraying, and the water pumping mechanism a is disposed at a bottom of the box 6 and used for supplying water to the first water outlet member and the second water outlet member b.

The pumping mechanism a comprises a water pumping assembly 100 capable of independently supplying water to the first water outlet component and the second water outlet component b, and a driving member 5 for providing power for the water pumping assembly 100, wherein the bottom of the box body 6 is provided with a concave draining area 61, the top of the draining area 61 is covered with a draining plate 62, the bottom of the water pumping assembly 100 is supported on the inner bottom wall of the box body 6 corresponding to the draining area 61, a gap 60 is arranged between the bottom of the water pumping assembly 100 and the inner bottom wall of the box body 6, and the upper part of the water pumping assembly 100 penetrates through the draining plate 62 and is positioned above the draining plate 62. The driving member 5 is disposed on the outer bottom wall of the box 6, and the output shaft 51 extends into the box 6 to connect with the water drawing assembly 100.

In this embodiment, the bottom wall of the box 6 is provided with a mounting opening 63, the upper end surface of the driving member 5 partially extends upward to form a boss 52 capable of being inserted into the mounting opening 63, the output shaft 51 is located at the center of the boss 52, and the bottom of the water drawing assembly 100 is supported on the boss 52. The driving piece 5 is a motor, and the part at the upper end of the motor is used for supporting the water drawing assembly 100, so that the structure of the bottom wall of the box body 6 is simplified, the production and the assembly are convenient, and meanwhile, the adverse effect on the water return effect caused by the rugged structure of the bottom wall of the box body 6 is avoided.

Specifically, a positioning block 521 extending upward is disposed on the upper surface of the boss 52 near the edge, and the bottom wall of the water drawing assembly 100 abuts against the positioning block 521 so as to restrict the gap 60 between the bottom wall of the water drawing assembly 100 and the bottom wall of the tank 6. The positioning block 521 partially extends beyond the edge of the boss 52, and the periphery of the mounting opening 63 is provided with a positioning notch 631 which is matched with the outer edge of the corresponding positioning block 521 to circumferentially limit the driving member 5. This structure can utilize locating piece 521 to carry out ascending spacing in circumference to motor and 6 diapalls of box, the assembly of being convenient for.

The upper surface of the boss 52 is further provided with a positioning column 522 extending upwards, and the bottom wall of the water drawing assembly 100 is provided with a positioning sleeve 101 capable of being inserted and connected with the positioning column 522. Three groups of matching structures of the positioning columns 522 and the positioning sleeves 101 are provided, and on the basis that the positioning blocks 521 support the water drawing assembly 100, the positioning columns 522 and the positioning sleeves 101 not only can further support the water drawing assembly 100, but also can limit the water drawing assembly 100 in the circumferential direction, so that the assembly is facilitated. The inner bottom wall of the box body 6 is provided with a threaded column 64 which is positioned at the periphery of the mounting opening 63 and extends upwards, the outer peripheral wall of the water drawing assembly 100 is provided with a connecting part 102 which can abut against the threaded column 64, and the connecting part 102 is provided with a mounting hole 103 which is arranged corresponding to the threaded column 64. After the positioning block 521 supports the water drawing assembly, the positioning column 522 is limited by the positioning sleeve 101, the mounting hole 103 corresponds to the threaded column 64 right, and the mounting hole and the threaded column are locked by screws, so that the assembly reliability of the water drawing assembly 100 is improved.

In order to facilitate the locking connection of the driving member 5 to the housing 6, the upper end surface of the driving member 5 located at the periphery of the boss 52 abuts against the outer bottom wall of the housing 6 and is locked by a screw. The inner bottom wall of the box body 6 is provided with a mounting plate 65 which is arranged around the periphery of the mounting opening 63, and a screw passes through the mounting plate 65, the bottom wall of the box body 6 and the upper end surface of the driving piece 5 to lock and connect the three. This structure is favorable to improving the assembly reliability, and under the state that the assembly finishes, diapire, mounting panel 65 upper surface, boss 52 upper surface in the box 6 roughly remain flush to avoid influencing the smooth and easy nature of return water.

In the present embodiment, the water drawing assembly 100 includes an upper impeller 1, a lower impeller 2, an upper housing 3, and a lower housing 4, where the upper impeller 1 is a centrifugal impeller, the lower impeller is an axial-flow impeller, and the lower impeller 2 is a centrifugal impeller. The upper casing 3 has a body extending in the length direction, the central portion of the body has a first accommodating cavity 31 for installing the upper portion of the upper impeller 1, the two sides of the body respectively have a flow channel communicated with the first accommodating cavity 31, the top wall of the upper casing 3 is opened with a spray hole 32 communicated with the flow channel, and the upper casing 1 constitutes the first water outlet component, i.e. the bottom spray arm. The lower shell 4 is connected below the upper shell 3, the upper part of the lower shell 4 is provided with a second accommodating cavity 41 for installing the lower part of the upper impeller 1, and the side wall of the lower shell 4 is provided with a first water inlet 411 for water to enter the second accommodating cavity 41; the lower part of the lower shell 4 is provided with a third accommodating cavity 42 for mounting the lower impeller 2, the second accommodating cavity 41 and the third accommodating cavity 42 are relatively independent, the bottom wall of the lower shell 4 is provided with a second water inlet 421 for water to enter the third accommodating cavity 42, and the side wall of the lower shell 4 is provided with a water outlet 422 for water to be output from the third accommodating cavity 42.

An output shaft 51 of the driving member 5 penetrates through the bottom wall of the box body 6, the second water inlet 421 and the lower shell 4 from bottom to top to extend into the first accommodating cavity 31 of the upper shell 3 and is respectively connected with the lower impeller 2 and the upper impeller 1, and is used for driving the upper impeller 1 and the lower impeller 2 to rotate.

The structure forms an open type double-pump system, wherein the second accommodating cavity 41, the first accommodating cavity 31 and the upper impeller 1 which are positioned on the upper part spray water supply for the bottom, the third accommodating cavity 42 and the lower impeller 2 which are positioned on the lower part spray water supply for the top and/or the middle part, the same power source is adopted, and because the power of the two paths of water flow is independently supplied by the corresponding pumps, the lift and the water flow of each path of water flow are improved, and the cleaning effect is favorably improved.

In this embodiment, a first receiving groove 611 for receiving the lower housing 4 is formed by partially recessing the bottom wall of the box body 6, a water conduit 423 tangentially connected to the third receiving cavity 42 is connected to the water outlet 422 of the lower housing 4, a water passing opening 6112 for fluid communication between the water conduit 423 and the second water outlet component b is formed on the side wall of the first receiving groove 611, a water supply pipe 7 for supplying water at the bottom upwards to the second water outlet component b is disposed in the box body 6, and the lower end of the water supply pipe 7 is communicated with the water passing opening 6112.

In the assembled state, the distance between the outer peripheral wall of the lower housing 4 and the inner wall of the first containing groove 611 is 3-10 mm, and the distance is mainly used for preventing the accumulation of residues and ensuring that small residues can be sucked away along the water flow direction.

In the draining area 61, a second containing groove 612 with a depth greater than that of the first containing groove 611 is disposed on the bottom wall of the box body 6 beside the first containing groove 611, a slag collecting basket 9 is disposed on the draining plate 62, the lower portion of the slag collecting basket 9 is located below the draining plate 62 and is contained in the second containing groove 612, a water outlet 613 is disposed at the bottom of the second containing groove 612, and a drain valve and a drain pump structure communicated with the water outlet 613 are disposed at the outer bottom of the box body 6. The side of the first containing groove 611 has an opening 6111 communicated with the side of the second containing groove 612, the first water inlet 411 of the water pumping mechanism a is located above the opening 6111, the first water inlet 411 is connected with a suction nozzle 40 extending obliquely downward to the opening 6111, and the second water inlet 421 is located at the side of the opening 6111. With the above structure, the bottom of the second receiving groove 612 is the lowest position of the draining area 61, and the water outlet 613 is arranged at the lowest position, so that residual water can be drained completely, and bacteria and the like caused by water storage can be avoided; by arranging the first containing groove 611 and the second containing groove 612, the position of the water suction port of the water pumping mechanism a is greatly reduced, bubbles are isolated above the water level, and the water flow lift is prevented from being influenced by the bubbles; in the cleaning process, water flow is conveyed into the water pumping mechanism a through the second containing groove 612 after being filtered by the slag collecting basket 9, and the first containing groove 611 can be matched with the second containing groove 612 to play a role in guiding flow on the basis of assembling the water pumping mechanism a, so that the water return effect is improved.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.

Claims (10)

1. The cleaning machine comprises a box body (6), a first water outlet component, a second water outlet component (b) and a water pumping mechanism (a), wherein the first water outlet component is arranged at the lower part of the box body (6) and used for providing bottom spraying, the second water outlet component (b) is arranged at the upper part of the box body (6) and used for providing upper spraying, the water pumping mechanism (a) is arranged at the bottom of the box body (6) and used for providing water drawing power for the first water outlet component and the second water outlet component (b), and the cleaning machine is characterized in that: the water pumping mechanism (a) comprises a water drawing assembly (100) capable of independently supplying water for the first water outlet component and the second water outlet component (b) and a driving piece (5) used for providing power for the water drawing assembly (100), the bottom of the water drawing assembly (100) is supported on the inner bottom wall of the box body (6), a gap (60) is formed between the bottom of the water drawing assembly (100) and the inner bottom wall of the box body (6), the driving piece (5) is arranged on the outer bottom wall of the box body (6), and the output shaft (51) extends into the box body (6) and is connected with the water drawing assembly (100).

2. The cleaning machine of claim 1, wherein: the bottom wall of the box body (6) is provided with a mounting opening (63), the upper end face of the driving piece (5) partially extends upwards to form a boss (52) capable of being inserted into the mounting opening (63), the output shaft (51) is located at the central part of the boss (52), and the bottom of the water drawing assembly (100) is supported on the boss (52).

3. The cleaning machine of claim 2, wherein: the upper surface of the boss (52) is provided with a positioning block (521) extending upwards at the position close to the edge, and the bottom wall of the water drawing assembly (100) abuts against the positioning block (521) so as to restrict a gap (60) between the bottom wall of the water drawing assembly (100) and the bottom wall of the box body (6).

4. The cleaning machine of claim 3, wherein: the local part of the positioning block (521) extends to the outside of the edge of the boss (52), and the periphery of the mounting opening (63) is provided with a positioning notch (631) which is matched with the outer edge of the corresponding positioning block (521) so as to circumferentially limit the driving piece (5).

5. The cleaning machine of claim 2, wherein: the upper surface of the boss (52) is also provided with a positioning column (522) extending upwards, and the bottom wall of the water drawing assembly (100) is provided with a positioning sleeve (101) which can be inserted and connected with the positioning column (522).

6. The cleaning machine of claim 2, wherein: the inner bottom wall of the box body (6) is provided with a threaded column (64) which is positioned at the periphery of the mounting opening (63) and extends upwards, a connecting part (102) which can abut against the threaded column (64) is arranged on the outer peripheral wall of the water drawing assembly (100), and a mounting hole (103) which is arranged corresponding to the threaded column (64) is formed in the connecting part (102).

7. The cleaning machine of claim 2, wherein: the upper end face of the driving piece (5) positioned on the periphery of the boss (52) abuts against the outer bottom wall of the box body (6) and is connected in a locking mode through screws.

8. The cleaning machine of claim 7, wherein: the inner bottom wall of the box body (6) is provided with a mounting plate (65) arranged around the periphery of the mounting opening (63), and a screw penetrates through the mounting plate (65), the bottom wall of the box body (6) and the upper end face of the driving piece (5) to connect the box body with the driving piece in a locking manner.

9. The cleaning machine of claim 1, wherein: the water drawing assembly (100) comprises

An upper impeller (1), the upper part of which is a centrifugal impeller and the lower part of which is an axial-flow impeller;

a lower impeller (2) which is a centrifugal impeller;

the upper shell (3) is provided with a first accommodating cavity (31) for mounting the upper part of the upper impeller (1), the top wall and/or the side wall of the upper shell (3) is/are provided with spray holes (32) which are communicated with the first accommodating cavity (31) in a fluid mode, and the upper shell (3) forms the first water outlet component; and

lower casing (4), connect in the below of last casing (3), the upper portion of casing (4) has second holding chamber (41) that is arranged in installing impeller (1) lower part down, it has first water inlet (411) that supplies water to get into in second holding chamber (41) to open on the lateral wall of casing (4) down, the lower part of casing (4) has third holding chamber (42) that are used for installing impeller (2) down, it has second water inlet (421) that supplies water to get into in third holding chamber (42) to open on the diapire of casing (4) down, it has delivery port (422) that supplies water to export from third holding chamber (42) to open on the lateral wall of casing (4) down.

10. The cleaning machine of claim 9, wherein: the local recessed first storage tank (611) that forms and be used for installing casing (4) down of box (6) diapire, be connected with water pipe (423) of being connected with third holding chamber (42) tangential on delivery port (422) of casing (4) down, it has water passing opening (6112) that supplies this water pipe (423) and second water outlet component (b) fluid intercommunication to open on the lateral wall of first storage tank (611), under the state that the assembly finishes, the interval between the periphery wall of casing (4) and first storage tank (611) inner wall is 3 ~ 10mm down.

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