A cleaning machine

Abstract

The present application relates to a kind of cleaning machines, including box, slag collecting basket and guide seat, the bottom of box is provided with the backwater area of concave, the top of this backwater area is covered with filter plate, slag collecting basket is contained in backwater area and upper end exposes in filter plate, guide seat is set in backwater area and is used to guide the water of backwater area to filter plate, guide seat is through and bottom is supported on the bottom wall of backwater area, the lower port of guide seat is closed and only in side wall is opened with the water suction port of arrangement towards slag collecting basket.This application uses the cooperation installation of guide seat and bottom wall in backwater area, makes the inner cavity of guide seat relatively closed and only while side is arranged with the water suction port towards slag collecting basket, because the position of slag collecting basket is generally lower, therefore, can set low water suction port, reduce water level, to reduce the amount of washing water, avoid gas water suction, to improve pump water stability in turn;Water inhaled guide seat all comes from slag collecting basket, is favorable to improve slag collecting effect.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, specifically to a washing machine for cleaning fruits, vegetables, and tableware. Background Technology

[0002] In dishwashers that use open-flow water systems, the spray arms are typically engaged with the flow guide seat and fixed to the bottom of the sink.

[0003] For example, Chinese invention patent application CN202011063575.X, entitled "A Cleaning Machine and Cleaning Method" (publication number: CN112244711A), discloses a structure including a housing, a spray arm, a water-absorbing impeller, and a motor. The spray arm is located in the housing and has a water inlet on the bottom wall and a spray hole on the top wall. The water-absorbing impeller is rotatably located in the housing and is used to pump water from the bottom of the housing to the spray arm. The motor is located at the bottom of the housing and is used to drive the water-absorbing impeller to rotate. A flow guide seat is provided on the bottom wall of the housing, and the spray arm is rotatably supported on the upper end of the flow guide seat. A flow guide sleeve is provided in the flow guide seat, extending downward from the edge of the water inlet of the spray arm. The lower part of the water-absorbing impeller is located in the flow guide sleeve, and the upper part passes through the water inlet and is located in the spray arm.

[0004] In the open-flow water system of the aforementioned dishwasher, the guide vane, as a water suction component, constitutes an important part of the water flow system, and its structure directly affects the dishwasher's energy and water efficiency. With existing guide vane structures, due to the high suction port, when the actual liquid level is low, the pump may draw air into the flow channel during operation, severely affecting the head of the water jet sprayed by the spray arms and the cleaning effect. Maintaining a high liquid level, on the other hand, requires a larger volume of washing water, increasing operating costs.

[0005] In addition, in existing dishwashers, the spray arm is generally located in the center of the washing chamber, while the sludge collection basket is placed on the filter plate next to the guide seat. During the filtration and sludge collection process, since the water inlet is on the guide seat, the water flow speed near the guide seat is faster than the water flow speed at the sludge collection basket. This results in the poor sludge collection effect of the eccentrically arranged sludge collection basket. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a cleaning machine that reduces the amount of water used for washing and improves the stability of the pump water by lowering the water intake level, in light of the current state of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a cleaning machine that can improve the slag collection effect in light of the current state of the prior art.

[0008] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows:

[0009] A cleaning machine includes a housing, a slag collection basket, and a flow guide seat. The bottom of the housing is provided with a recessed return water area, and the top of the return water area is covered with a filter plate. The slag collection basket is housed in the return water area and its upper end protrudes from the filter plate. The flow guide seat is located in the return water area and is used to guide the water in the return water area to the filter plate. The flow guide seat is vertically continuous and its bottom is supported on the bottom wall of the return water area. In the assembled state, the lower port of the flow guide seat is closed, and only the side wall has a water intake port arranged towards the slag collection basket.

[0010] Preferably, the bottom wall of the return water area is provided with an upwardly protruding mounting platform, the bottom of the flow guide seat is supported on the mounting platform, and the lower edge of the water inlet is arranged close to the upper surface of the mounting platform. This structure facilitates the installation of the drive component and, on the other hand, increases the distance between the water inlet and the bottom wall of the return water area, thereby increasing the water intake flow rate.

[0011] Preferably, the outer peripheral wall of the guide seat is provided with a baffle extending from the top edge and side edge of the self-suction port towards the slag collection basket. The internal space of the baffle forms a fan-shaped suction channel with a gradually increasing width from the self-suction port outwards. The top wall of the baffle gradually decreases in height from the self-suction port outwards. This structure helps to further concentrate the suction area near the slag collection basket, thereby increasing the suction force at the slag collection basket and improving the slag collection effect. The fan-shaped suction channel has a certain pressurizing effect on the water along the water flow direction, which helps to improve the return water efficiency. The gradually decreasing height of the baffle top wall can reduce the height of the suction port and avoid the intake of air bubbles, thereby eliminating the problem of reduced pump performance due to gas intake.

[0012] Preferably, the outer edge of the baffle is located outside the mounting platform and is suspended above the bottom wall of the return water area outside the mounting platform. This structure maintains a large water absorption cross-sectional area while reducing the height of the water intake, thereby improving the return water efficiency.

[0013] Preferably, a drain outlet is provided on the bottom wall of the return water area, and the bottom of the return water area surrounding the drain outlet is recessed to form an annular water collection area arranged around the slag collection basket. The outer edge of the baffle extends into this annular water collection area. This structure helps to further improve the water absorption effect, prevent gas from being sucked in, and maintain a large water absorption flow rate.

[0014] The cleaning machine of the present invention also includes a spray arm, an impeller assembly and a drive unit. The spray arm is located on the top of the guide seat. The impeller assembly is rotatably located in the guide seat and / or the spray arm and is used to draw water from the return water area into the spray arm. The drive unit is located on the outer bottom wall of the housing and the power output shaft extends into the housing and is connected to the impeller assembly.

[0015] Preferably, the mounting platform has a mounting port in the middle corresponding to the lower port of the guide seat, and the top of the drive component is provided with a top cover that can extend through the mounting port into the lower port of the guide seat. The power output shaft extends upward through the top cover. This structure makes the assembly of the lower end of the guide seat compact, allowing water to be drawn in only from the side suction port, thus reducing energy loss.

[0016] Preferably, the upper surface of the cover gradually slopes upward from the outer edge to the center to form a guide surface, with the outer edge of the guide surface corresponding to the inner edge of the water inlet. This structure can guide the water from the water inlet upward, so as to avoid the water entering the guide seat from colliding and generating eddies in the lower cavity of the guide seat, thus preventing energy loss.

[0017] For ease of assembly, the bottom edge of the flow guide seat is provided with a base plate that extends outward and abuts against the mounting platform. The base plate is connected to the mounting platform by screws.

[0018] In this invention, the flow guide seat includes an upper flow guide sleeve and a lower flow guide sleeve. The upper flow guide sleeve is rotatable and detachably constrained on the lower flow guide sleeve. The upper flow guide sleeve and the lower flow guide sleeve form a longitudinally arranged flow guide channel when they are in a mutually engaged state. The water intake port is opened on the side wall of the lower flow guide sleeve. The top of the guide seat is connected to the spray arm. During rotation, the impeller in the spray arm generates negative pressure. Existing spray arms are connected to the guide seat at the inlet via a retaining ring, resulting in a complex assembly structure. This makes it easy for gas to be drawn into the spray arm at this connection, affecting pumping efficiency. Furthermore, removing the spray arm requires rotating it in a specific direction before lifting it off, which is very inconvenient for spray arms installed at the bottom of a kitchen sink. This invention moves the rotating mechanism to the middle of the guide seat, eliminating relative rotation between the spray arm and the upper guide sleeve. This greatly simplifies the connection structure, achieving better sealing to prevent gas from being drawn into the spray arm. Additionally, the upper guide sleeve with the spray arm installed can be directly lifted from the lower guide sleeve, making disassembly and assembly very convenient.

[0019] Preferably, the inner circumferential wall of the upper part of the lower guide sleeve is provided with a circumferentially arranged convex ring, and the lower part of the upper guide sleeve is inserted into the upper guide sleeve, with a convex catch at the outer edge of the lower end that can engage with the lower edge of the convex ring. This structure facilitates the rotation of the upper guide sleeve relative to the lower guide sleeve, and allows the upper guide sleeve to be removed from the lower guide sleeve by lifting it upwards, and to be assembled onto the lower guide sleeve by pressing it downwards, making assembly and disassembly convenient.

[0020] Preferably, the inner wall of the lower guide sleeve has a first inclined edge that gradually slopes upwards and outwards near the lower edge of the convex ring. An annular groove is formed between the first inclined edge and the lower edge of the convex ring, and the convex ring is rotatably constrained within this groove. The lower wall surface of the convex ring forms a second inclined edge that follows the same inclination direction as the first inclined edge, thus guiding and engaging with it. The lower edge of the convex ring forms a third inclined edge that gradually slopes downwards and outwards. Correspondingly, the upper wall surface of the convex ring forms a fourth inclined edge that follows the same inclination direction as the third inclined edge, thus guiding and engaging with it. This structure improves rotational smoothness and assembly stability.

[0021] Preferably, when the upper and lower guide sleeves are joined together, the inner wall surfaces of the upper and lower guide sleeves are substantially flush. This structure improves assembly compactness and avoids fluid energy loss.

[0022] As an improvement, the middle part of the lower guide sleeve contracts radially to form a contraction section, and a limiting groove arranged circumferentially is formed on the outer wall of the contraction section. The top of the upper guide sleeve is provided with a limiting arm that extends downward and whose lower end rotates with the limiting groove. The inner wall of the contraction section forms a first guiding arc surface with a smooth transition, and the lower edge of the first guiding arc surface is smoothly connected to the top edge of the water inlet. With the above structure, the contraction section actually has the following three functions: (1) The outer side is used to limit the rotation with the limiting arm, which improves the installation reliability and rotational stability of the spray arm; (2) The inner side of the contraction section reduces the inner diameter of the lower guide sleeve, which can pressurize the water flow to increase the spray head and spray force of the water column, thereby improving the cleaning effect; (3) The inner wall of the contraction section is directly connected to the upper edge of the water inlet, which is conducive to guiding the sucked water directly upward, and avoiding a large amount of water entering the lower cavity of the lower guide sleeve to cause collision or eddy current and energy loss. In addition, the first guiding arc surface of the contraction section can reduce the energy loss caused by the reversal of the energy hydraulic direction.

[0023] Preferably, the lower end of the limiting arm is bent inward to form an elastic locking foot that can be engaged in the limiting groove, and the upper surface of the elastic locking foot forms a guide slope that gradually slopes upward from the inside to the outside with the inner top wall of the limiting groove. This structure facilitates the use of the limiting arm to improve the rotational stability of the upper guide sleeve relative to the lower guide sleeve and the assembly reliability.

[0024] Preferably, the inner diameter of the upper guide sleeve is consistent with the inner diameter of the contraction section but smaller than the inner diameter of the lower part of the lower guide sleeve.

[0025] The cleaning machine of the present invention further includes a spray arm disposed on the top of the upper guide sleeve. The spray arm has a flow channel extending along its length. A water inlet communicating with the flow channel is formed on the bottom wall of the spray arm, and a water spray hole communicating with the flow channel is formed on the top wall. The inner wall of the upper part of the upper guide sleeve gradually extends outward from bottom to top to form a second guide arc surface that gradually transitions towards the water inlet. This structure helps to improve the assembly compactness between the spray arm and the upper guide sleeve and reduces fluid energy loss.

[0026] Preferably, the top of the upper guide sleeve is provided with a first assembly ring arranged around the periphery of the second guide arc surface, and the bottom wall of the spray arm is provided with a second assembly ring extending downward from the outer edge of the water inlet. The first assembly ring has a protruding limiting rib, and correspondingly, the inner wall of the second assembly ring has a limiting opening that cooperates with the limiting rib for limiting. This structure facilitates the detachable binding of the spray arm and the upper guide sleeve together, preventing relative rotation between them and improving assembly compactness.

[0027] The cleaning machine of the present invention further includes an impeller assembly for drawing water from the return water area into the spray arm, the impeller assembly including a centrifugal impeller located in the spray arm through the water inlet and an axial flow impeller located in the upper guide sleeve and / or the lower guide sleeve.

[0028] Preferably, the upper part of the axial flow impeller is located in the upper guide sleeve, the lower part is located in the lower guide sleeve, and the lower end of the axial flow impeller is located below the upper edge of the water inlet. This structure is beneficial to improving the water suction effect.

[0029] Compared with the prior art, the advantages of the present invention are as follows: The present invention utilizes the cooperation between the guide seat and the bottom wall of the return water area to make the inner cavity of the guide seat relatively closed, with only the side opening having a water inlet arranged towards the slag collection basket. Since the slag collection basket is generally in a lower position, the water inlet can be set low to reduce the water intake level, thereby reducing the amount of washing water, avoiding gas water intake, and thus improving the pump water stability; the water sucked into the guide seat all comes from the slag collection basket, which is beneficial to improving the return water suction and speed at the slag collection basket, thereby improving the slag collection effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view of an embodiment of the present invention;

[0032] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0033] Figure 4 This is a top view of an embodiment of the present invention (with the spray arm, filter plate, and slag collection basket hidden).

[0034] Figure 5 This is a schematic diagram of the flow guide seat according to an embodiment of the present invention;

[0035] Figure 6 for Figure 5 A sectional view;

[0036] Figure 7 for Figure 5 Exploded view;

[0037] Figure 8 This is a schematic diagram of the structure of the spray arm according to an embodiment of the present invention. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown in Figure 8, the cleaning machine of this embodiment includes a housing 1, a slag collection basket 2, a flow guide seat 3, a spray arm 4, an impeller assembly 5, and a drive component 6. The bottom of the housing 1 is provided with a recessed return water area 11, and the top of the return water area 11 is covered with a filter plate 12. The slag collection basket 2 is housed in the return water area 11 and its upper end protrudes from the filter plate 12. The flow guide seat 3 is provided in the return water area 11 and is used to guide the water in the return water area 11 to the filter plate 12.

[0040] In this embodiment, the guide seat 3 is vertically connected and its bottom is supported on the bottom wall of the return water area 11. When assembled, the lower port of the guide seat 3 is closed and only the suction port 30 facing the slag collection basket 2 is opened on the side wall.

[0041] like Figure 3 As shown, the bottom wall of the return water area 11 is provided with an upwardly protruding mounting platform 111. The bottom of the flow guide seat 3 is supported on the mounting platform 111, and the lower edge of the suction port 30 is arranged close to the upper surface of the mounting platform 111. This structure facilitates the installation of the drive component 6 and increases the distance between the suction port 30 and the bottom wall of the return water area 11, thereby increasing the water suction flow rate.

[0042] A baffle 33 is provided on the outer peripheral wall of the guide seat 3, extending from the top and side edges of the self-suction port 30 towards the slag collection basket 2. The internal space of the baffle 33 forms a fan-shaped suction channel 331 with a gradually increasing width from the self-suction port 30. The top wall of the baffle 33 gradually decreases in height from the self-suction port 30. This structure helps to further concentrate the suction area near the slag collection basket 2, thereby increasing the suction force at the slag collection basket 2 and improving the slag collection effect. The fan-shaped suction channel 331 has a certain pressurizing effect on the water along the water flow direction, which helps to improve the return water efficiency. The gradually decreasing height of the top wall of the baffle 33 can reduce the height of the suction port 30, avoiding the intake of air bubbles and thus eliminating the problem of reduced pump performance due to gas intake.

[0043] The outer edge of the baffle 33 is located outside the mounting platform 111 and is suspended above the bottom wall of the return water area 11 outside the mounting platform 111. This structure maintains a large water intake cross-sectional area while reducing the height of the water intake port 30, thereby improving the return water efficiency.

[0044] A drain outlet 112 is provided on the bottom wall of the return water area 11. A slag collection basket 2 is vertically arranged in the return water area 11, with its lower end interlocked with the drain outlet 112 and its upper end constrained to the filter plate 12. The upper end of the slag collection basket 2 protrudes from the filter plate 12. The bottom of the return water area 11 surrounding the drain outlet 112 is recessed to form an annular water collection area 113 surrounding the slag collection basket 2. The outer edge of the baffle 33 extends into this annular water collection area 113. This structure helps to further improve the water absorption effect, prevent gas intake, and maintain a large water absorption flow rate.

[0045] In this embodiment, the flow guide seat 3 includes an upper flow guide sleeve 31 and a lower flow guide sleeve 32. The upper flow guide sleeve 31 is rotatable and detachably constrained on the lower flow guide sleeve 32. The upper flow guide sleeve 31 and the lower flow guide sleeve 32 form a longitudinally arranged flow guide channel 300 when they are in a mutually engaged state. The water inlet 30 is opened on the side wall of the lower flow guide sleeve 32.

[0046] The top of the upper guide sleeve 31 is connected to the spray arm 4. The spray arm 4 has a flow channel 41 extending along its length. The bottom wall of the spray arm 4 has a water inlet 42 communicating with the flow channel 41, and the top wall has a water spray hole 43 communicating with the flow channel 41. The impeller assembly 5 includes a centrifugal impeller 51 located in the spray arm 4 through the water inlet 42 and an axial flow impeller 52 located in the upper guide sleeve 31 and the lower guide sleeve 32. The upper part of the axial flow impeller 52 is located in the upper guide sleeve 31, and the lower part is located in the lower guide sleeve 42. The lower end of the axial flow impeller 52 is located below the upper edge of the suction port 30. The drive unit 6 is provided on the outer bottom wall of the housing 1, and the power output shaft 61 extends into the housing 1 and is connected to the impeller assembly 5.

[0047] During rotation, the impeller assembly 5 in the spray arm 4 generates negative pressure. Existing spray arms have a complex assembly structure where the inlet 42 is connected to the guide seat via a retaining ring. This connection easily allows gas to be drawn into the spray arm, affecting pumping efficiency. Furthermore, removing the spray arm requires rotating it in a specific direction before lifting it off, which is inconvenient for spray arms installed at the bottom of a kitchen sink. This invention moves the rotating assembly structure to the center of the guide seat, eliminating relative rotation between the spray arm and the upper guide sleeve. This greatly simplifies the connection structure, achieving better sealing to prevent gas from being drawn into the spray arm. Additionally, the upper guide sleeve with the spray arm installed can be directly lifted from the lower guide sleeve, making disassembly and assembly very convenient.

[0048] like Figure 3As shown, in this embodiment, the mounting platform 111 has a mounting port 114 in the middle corresponding to the lower port of the guide seat 3. The driving component 6 is a motor, and the top of the driving component 6 is provided with an upper cover 62 that can pass through the mounting port 114 and extend into the lower port of the guide seat 3. The power output shaft 61 extends upward through the upper cover 62. This structure makes the assembly of the lower end of the guide seat 3 compact, allowing water to be drawn in only from the side suction port 30, thus reducing energy loss.

[0049] The upper surface of the top cover 62 gradually slopes upward from the outer edge to the center to form a guide surface 621, the outer edge of which corresponds to the inner edge of the water inlet 30. This structure can guide the water from the water inlet 30 upward to avoid the water entering the guide seat from colliding in the cavity of the lower guide sleeve 32 and generating eddies, thus preventing energy loss.

[0050] For ease of assembly, the bottom edge of the lower guide sleeve 32 is provided with a base plate 321 that extends outward and abuts against the mounting platform 111. The base plate 321 is connected to the mounting platform 111 by screws.

[0051] In this embodiment, as Figure 6 , 7 As shown, a circumferentially arranged protruding ring 322 is provided on the inner peripheral wall of the upper part of the lower guide sleeve 32. The lower part of the upper guide sleeve 31 is inserted into the upper guide sleeve 31, and a protruding clip 311 is provided at the outer edge of the lower end, which can engage with the lower edge of the protruding ring 322. The above structure facilitates the rotation of the upper guide sleeve 31 relative to the lower guide sleeve 32. Furthermore, the upper guide sleeve 31 can be removed from the lower guide sleeve 32 by lifting it upwards, and it can be assembled onto the lower guide sleeve 32 by pressing it downwards, making disassembly and assembly convenient.

[0052] On the inner wall of the lower guide sleeve 32, near the lower edge of the convex ring 322, a first inclined edge 323 is formed, gradually sloping upwards and outwards. An annular groove 324 is formed between the first inclined edge 323 and the lower edge of the convex ring 322, and the convex clip 311 is rotatably constrained within this groove 324. The lower wall surface of the convex clip 311 forms a second inclined edge 3111 that follows the same inclination direction as the first inclined edge 323, thus guiding and engaging with it. The lower edge of the convex ring 322 forms a third inclined edge 3221 that gradually slopes downwards and outwards. Correspondingly, the upper wall surface of the convex clip 311 forms a fourth inclined edge 3112 that follows the same inclination direction as the third inclined edge 3221, thus guiding and engaging with it. This structure improves rotational smoothness and assembly stability.

[0053] When the upper guide sleeve 31 and the lower guide sleeve 32 are joined together, the inner wall surfaces of the upper guide sleeve 31 and the lower guide sleeve 32 are basically flush. This structure improves assembly compactness and avoids fluid energy loss.

[0054] In this embodiment, the middle part of the lower guide sleeve 32 contracts radially to form a contraction part 325. A limiting groove 326 arranged circumferentially is formed on the outer wall of the contraction part 325. The top of the upper guide sleeve 31 is provided with a limiting arm 312 that extends downward and whose lower end is rotatably engaged with the limiting groove 326. The inner wall of the contraction part 325 forms a first guide arc surface 327 with a smooth transition, and the lower edge of the first guide arc surface 327 is smoothly connected to the top edge of the water inlet 30. With the above structure, the contraction part 325 actually has the following three functions: (1) The outer side of the contraction part 325 is used to limit the rotation with the limiting arm 312, thereby improving the installation reliability and rotation stability of the spray arm 4; (2) The inner side of the contraction part 325 reduces the inner diameter of the lower guide sleeve 32, which can pressurize the water flow to increase the spray head and spray force of the water column, thereby improving the cleaning effect; (3) The inner wall of the contraction part 325 is directly connected to the upper edge of the water inlet 30, which is conducive to guiding the sucked water directly upward, and avoiding a large amount of water entering the lower cavity of the lower guide sleeve 32 to cause collision or eddy current and energy loss. In addition, the first guide arc surface 327 of the contraction part 325 can reduce the energy loss caused by the reversal of the energy hydraulic direction.

[0055] like Figure 5 , 7 As shown, the lower end of the aforementioned limiting arm 312 is bent inward to form an elastic locking foot 313 that can be locked in the limiting groove 326, and the upper surface of the elastic locking foot 313 forms a guide slope a that gradually slopes upward from the inside to the outside with the inner top wall of the limiting groove 326. This structure facilitates the use of the limiting arm 312 to improve the rotational stability of the upper guide sleeve 31 relative to the lower guide sleeve 32 and the assembly reliability.

[0056] The inner diameter of the upper guide sleeve 31 is consistent with the inner diameter of the contraction part 325, but smaller than the inner diameter of the lower part of the lower guide sleeve 32.

[0057] The inner wall of the upper part of the upper guide sleeve 31 gradually extends outward from bottom to top to form a second guide arc surface 314 that gradually transitions to the water inlet 42 of the spray arm 4. This structure helps to improve the assembly compactness between the spray arm 4 and the upper guide sleeve 31 and reduce fluid energy loss.

[0058] The top of the upper guide sleeve 31 is provided with a first assembly ring 315 arranged around the periphery of the second guide arc surface 314. The bottom wall of the spray arm 4 is provided with a second assembly ring 44 extending downward from the outer edge of the water inlet 42. A limiting rib 316 protrudes from the outer peripheral wall of the first assembly ring 315. Correspondingly, a limiting opening 45 is provided on the inner wall of the second assembly ring 44, which can cooperate with the limiting rib 316 to limit the position. This structure facilitates the detachable constraint of the spray arm 4 and the upper guide sleeve 31 together, preventing relative rotation between the two and improving the assembly compactness.

[0059] In this embodiment, the guide seat 4 is installed in conjunction with the bottom wall of the return water area 11, making the inner cavity of the guide seat 4 relatively closed, with only the side opening having a suction port 30 facing the slag collection basket 2. Since the slag collection basket 2 is generally in a lower position, the suction port 30 can be set low to reduce the water level, thereby reducing the amount of washing water, avoiding gas suction, and improving the stability of the pump water. The water sucked into the guide seat 4 all comes from the slag collection basket 2, which helps to improve the return water suction and speed at the slag collection basket 2, thereby improving the slag collection effect. In this embodiment, the guide seat 4 can be detachably connected by inserting it into the upper and lower parts, which facilitates the disassembly and assembly of the spray arm 4 and the upper guide sleeve 31 for cleaning.

[0060] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning machine, comprising a housing (1), a slag collection basket (2), and a flow guide seat (3), wherein the bottom of the housing (1) is provided with a recessed return water area (11), the top of the return water area (11) is covered with a filter plate (12), the slag collection basket (2) is accommodated in the return water area (11) and its upper end protrudes from the filter plate (12), and the flow guide seat (3) is disposed in the return water area (11) and is used to guide the water in the return water area (11) onto the filter plate (12), characterized in that: The guide seat (3) is vertically connected and its bottom is supported on the bottom wall of the return water area (11). When assembled, the lower port of the guide seat (3) is closed and only the suction port (30) facing the slag collection basket (2) is opened on the side wall. The bottom wall of the return water area (11) is provided with an upwardly protruding mounting platform (111), the bottom of the guide seat (3) is supported on the mounting platform (111), and the lower edge of the suction port (30) is arranged close to the upper surface of the mounting platform (111). The outer peripheral wall of the guide seat (3) is provided with a baffle (33) extending from the top edge and side edge of the suction port (30) to the slag basket (2). The internal space of the baffle (33) forms a fan-shaped suction channel (331) whose width gradually increases from the suction port (30) outward. The top wall of the baffle (33) gradually decreases in height from the suction port (30) outward. The outer edge of the baffle (33) is located outside the mounting platform (111) and is suspended above the bottom wall of the return water area (11) outside the mounting platform (111).

2. The cleaning machine according to claim 1, characterized in that: The bottom wall of the return water area (11) has a drain outlet (112). The bottom of the return water area (11) surrounding the drain outlet (112) is recessed to form an annular water collection area (113) arranged around the slag collection basket (2). The outer edge of the baffle (33) extends into the annular water collection area (113).

3. The cleaning machine according to any one of claims 1 to 2, characterized in that: It also includes a spray arm (4), an impeller assembly (5) and a drive unit (6). The spray arm (4) is located on the top of the guide seat (3). The impeller assembly (5) is rotatably located in the guide seat (3) and / or the spray arm (4) for drawing water from the return water area (11) into the spray arm (4). The drive unit (6) is located on the outer bottom wall of the housing (1) and the power output shaft (61) extends into the housing (1) and is connected to the impeller assembly (5).

4. The cleaning machine according to claim 3, characterized in that: The mounting platform (111) has a mounting port (114) in the middle that corresponds to the lower port of the guide seat (3). The top of the drive unit (6) is provided with an upper cover (62) that can pass through the mounting port (114) and extend into the lower port of the guide seat (3). The power output shaft (61) extends upward through the upper cover (62).

5. The cleaning machine according to claim 4, characterized in that: The upper surface of the cover (62) gradually slopes upward from the outer edge to the center to form a guide surface (621), and the outer edge of the guide surface (621) is arranged corresponding to the inner edge of the water inlet (30).

6. The cleaning machine according to claim 4, characterized in that: The bottom edge of the flow guide seat (3) is provided with a base plate (321) that extends outward and abuts against the mounting platform (111), and the base plate (321) is locked to the mounting platform (111).

7. The cleaning machine according to any one of claims 1 to 2, characterized in that: The flow guide seat (3) includes an upper flow guide sleeve (31) and a lower flow guide sleeve (32). The upper flow guide sleeve (31) is rotatable and detachably constrained on the lower flow guide sleeve (32). The upper flow guide sleeve (31) and the lower flow guide sleeve (32) form a longitudinally arranged flow guide channel (300) when they are in a mutually engaged state. The water inlet (30) is opened on the side wall of the lower flow guide sleeve (32).

8. The cleaning machine according to claim 7, characterized in that: The lower guide sleeve (32) has a convex ring (322) arranged circumferentially on the inner peripheral wall of the upper part, and the lower part of the upper guide sleeve (31) is inserted into the upper guide sleeve (31) and a convex clip (311) that can engage with the lower edge of the convex ring (322) is provided at the outer edge of the lower end.

9. The cleaning machine according to claim 8, characterized in that: On the inner wall of the lower guide sleeve (32), a first inclined edge (323) is formed near the lower edge of the convex ring (322), which is gradually inclined from bottom to top and from inside to outside. An annular groove (324) is formed between the first inclined edge (323) and the lower edge of the convex ring (322), and the convex clip (311) is rotatably constrained in the groove (324).

10. The cleaning machine according to claim 9, characterized in that: The lower wall surface of the convex card (311) forms a second inclined side (3111) that is in the same direction of inclination as the first inclined side (323) and thus guides and cooperates with it.

11. The cleaning machine according to claim 9, characterized in that: The lower edge of the convex ring (322) forms a third inclined side (3221) that is gradually inclined from top to bottom and from inside to outside. Correspondingly, the upper wall surface of the convex card (311) forms a fourth inclined side (3112) that is in the same direction of inclination as the third inclined side (3221) and thus guides and cooperates with it.

12. The cleaning machine according to claim 8, characterized in that: When the upper guide sleeve (31) and the lower guide sleeve (32) are connected vertically, the inner wall surface of the upper guide sleeve (31) and the inner wall surface of the lower guide sleeve (32) are basically flush.

13. The cleaning machine according to claim 7, characterized in that: The lower guide sleeve (32) forms a contraction section (325) in the middle of the radial direction. A limiting groove (326) is formed on the outer wall of the contraction section (325) in the circumferential direction. The upper guide sleeve (31) is provided with a limiting arm (312) that extends downward and whose lower end is rotatably engaged with the limiting groove (326). The inner wall of the contraction section (325) forms a first guide arc surface (327) with a smooth transition. The lower edge of the first guide arc surface (327) is smoothly connected to the top edge of the water inlet (30).

14. The cleaning machine according to claim 13, characterized in that: The lower end of the limiting arm (312) is bent inward to form an elastic locking foot (313) that can be locked in the limiting groove (326), and the upper surface of the elastic locking foot (313) and the inner top wall of the limiting groove (326) form a guide slope (a) that gradually slopes upward from the inside to the outside.

15. The cleaning machine according to claim 13, characterized in that: The inner diameter of the upper guide sleeve (31) is consistent with the inner diameter of the contraction part (325) but smaller than the inner diameter of the lower part of the lower guide sleeve (32).

16. The cleaning machine according to claim 7, characterized in that: It also includes a spray arm (4) located at the top of the upper guide sleeve (31). The spray arm (4) has a flow channel (41) extending along the length direction. The bottom wall of the spray arm (4) has an inlet (42) connected to the flow channel (41), and the top wall has a spray hole (43) connected to the flow channel (41). The inner wall of the upper part of the upper guide sleeve (31) gradually extends outward from bottom to top to form a second guide arc surface (314) that gradually transitions to the inlet (42).

17. The cleaning machine according to claim 16, characterized in that: The top of the upper guide sleeve (31) is provided with a first assembly ring (315) arranged around the periphery of the second guide arc surface (314), and the bottom wall of the spray arm (4) is provided with a second assembly ring (44) extending downward from the outer edge of the water inlet (42). The first assembly ring (315) is provided with a limiting rib (316), and correspondingly, the inner wall of the second assembly ring (44) is provided with a limiting port (45) that can cooperate with the limiting rib (316) for limiting.

18. The cleaning machine according to claim 16, characterized in that: It also includes an impeller assembly (5) for drawing water from the return water area (11) into the spray arm (4), the impeller assembly (5) including a centrifugal impeller (51) located in the spray arm (4) through the inlet (42) and an axial flow impeller (52) located in the upper guide sleeve (31) and / or the lower guide sleeve (32).

19. The cleaning machine according to claim 18, characterized in that: The upper part of the axial flow impeller is located in the upper guide sleeve (31), the lower part is located in the lower guide sleeve (32), and the lower end of the axial flow impeller (52) is located below the upper edge of the water inlet (30).

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