Cleaning machine

Abstract

The utility model relates to a cleaning machine which comprises a box body, a water pump, a slag collecting basket and a spraying arm, the spraying arm is arranged above a water return area and communicated with the water pump through a water guide pipe, the water guide pipe is arranged in the middle of the lower portion of the box body and vertically extends, and the water pump and the slag collecting basket are adjacently arranged below the water guide pipe. The water pump is provided with a water outlet offset relative to the center of the water pump and communicated with the lower end of the water guide pipe. The water pump and the slag collecting basket are adjacently arranged, the whole formed by the water pump and the slag collecting basket is arranged at the bottom of the box body in a relatively centered mode, the water pump is arranged in a bias mode relative to the central portion of the box body, and water is guided to the central portion of the box body through the bias water outlet arranged on the water pump. According to the offset water pump structure, the slag collecting basket can be relatively centered at the bottom of the box body, the slag collecting effect can be improved, a water return area can be conveniently made into a compact structure surrounding the peripheries of the water pump and the slag collecting basket, the space of the water return area is greatly reduced, the water consumption is saved, and the water return speed and the water efficiency can be improved.

Description

Technical Field

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

[0002] Dishwashers have been widely used in home kitchens. Dishwashers are generally equipped with spray arms for spraying water columns, and a concave return water area is set at the bottom of the box. The top of the return water area is covered with a filter plate. A water pump is used to pump water from the return water area to the spray arm above the filter plate to achieve a circulating spray of washing water. Using an open water pump to draw water for the spray arm can greatly shorten the return water path, improve the return water efficiency, and facilitate the maintenance of the water pump. However, compared with dishwashers using closed water pumps, since dishwashers using open water pumps need to install the water pump in the return water area, affected by the flow characteristics of the fluid, it has higher requirements for the structure of the return water area.

[0003] "A Cleaning Machine" (application number: CN202023352193.7), with the authorization announcement number CN215838898U, discloses a water cup structure for installing an open water pump. The overall shape is semicircular, and the water pump, heating element and slag basket are arranged in a triangular shape on the water cup. In this patent, the water pump is coaxially arranged with the spray arm. In order to better cover the tableware cleaning range, the spray arm needs to be arranged in the center relative to the box body, so the water pump also needs to be arranged in the center relative to the box body. In order to make room for the water pump, the return water area, especially the slag basket located next to the water pump, needs to be offset relative to the bottom wall of the box body (that is, deviated from the center of the bottom wall and arranged close to the outside of the bottom wall). During the return water process, the ideal effect is that the return water enters the return water area after filtering the residue through the slag basket, and then is further drawn into the spray arm through the water suction port of the open water pump located in the return water area. However, due to the large diameter of the water pump, the slag collecting basket is offset too far from the bottom wall of the box, causing the return water to enter the return water area before flowing to the slag collecting basket. The slag collecting effect is poor and residue is easily retained on the filter plate.

[0004] In addition, the structure of the above-mentioned return water area determines that the heating element located next to the water pump is also offset on the bottom wall of the box. In order to improve the heating efficiency, it is necessary to have a corresponding return water area above the heating element. This requires the return water area to have a volume that meets the installation requirements of the heating element and the slag basket, which makes it difficult to reduce the total volume of the return water chamber, resulting in a certain amount of water waste and affecting the water efficiency of the cleaning machine. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cleaning machine which can make the best use of space to arrange various functional parts so as to improve the slag collection effect, save water and improve water efficiency in view of the current status of the existing technology.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A cleaning machine comprises a box body, a water pump, a slag collecting basket, and a spray arm. A concave water return area is provided at the bottom of the box body, the water pump and the slag collecting basket are both arranged in the water return area, the spray arm is arranged above the water return area and is connected to the water pump through a water guide pipe, the water pump and the slag collecting basket are arranged adjacent to each other in the water return area, and the water pump is provided with a water outlet which is offset relative to the center of the water pump and is connected to the water inlet end of the water guide pipe.

[0008] Preferably, the water pipe is arranged vertically in the central area of ​​the lower part of the box, the water pump and the slag collection basket are located below the water pipe, and the water outlet is connected to the lower end of the water pipe. Further preferably, the length of the bottom of the box is L and the width is W. From a top view, the central area is centered on the center of the box, and the radius of the central area is R = (0.15-0.45)(L, W) min . Among them, (L,W) min is the minimum value of L and W. The above structure is adopted to make the arrangement of various functional components more reasonable and compact, and provide conditions for the central installation and spraying of the bottom spray arm on the basis of saving assembly space and reducing the volume of the return water area.

[0009] Preferably, the lower end of the water guide pipe is arranged in the area between the main part of the water pump and the slag collection basket. The diameter of the water guide pipe is basically consistent with the diameter of the inlet of the bottom wall of the spray arm, and the diameter is much smaller than the diameter of the main part of the water pump and the slag collection basket. The water guide pipe, the water pump, and the slag collection basket are arranged in the above position relationship, which can make more reasonable use of space and make the three compactly arranged, which is convenient for shortening the return water stroke on the basis of reducing the volume of the return water area.

[0010] Preferably, the water return area has a relative length and width, and the length is greater than the width, the slag basket is arranged close to the inner wall of the water return area in the first width direction, and the water pump is arranged close to the inner wall of the water return area in the second width direction. The slag basket is cylindrical, and the main body of the water pump in the present invention is disc-shaped. After the two are arranged side by side and adjacent to each other, the minimum space occupied needs to have a certain length and width, and the length is greater than the width, so as to make fuller use of the water return area space, improve water return efficiency, and save water.

[0011] Further preferably, when viewed from a top view, the water return area is a rectangular structure, the water pump and the slag collecting basket are arranged side by side along the length direction of the rectangular structure, and the inner wall of the rectangular structure in a first width direction is arranged close to the outer wall of the slag collecting basket.

[0012] Preferably, the slag collecting basket is a cylindrical structure, and the inner wall of the rectangular structure in the first width direction is formed as an arc surface surrounding the outer side of the cylindrical structure. With such a structure, the amount of return water in the outer part of the slag collecting basket can be reduced on the basis of further saving the space of the return water area, and the return water is filtered from the side wall of the slag collecting basket close to the water pump and then sucked into the water pump, which is conducive to improving the slag collecting effect and return water efficiency.

[0013] Preferably, the centers of the projections of the water pump, the water pipe and the slag collecting basket in the horizontal plane are located on the same straight line, and the projection of the water pump and the projection of the slag collecting basket are respectively located on both sides of the projection of the water pipe. The above structure is adopted to improve the compactness of the assembly of the water pump and the slag collecting basket and save installation space.

[0014] As a preferred embodiment, the projection of the water conduit is tangent to at least one of the projection of the water pump and the projection of the slag collection basket. As another preferred embodiment, there is a spacing between the projection of the water conduit and the projection of the water pump and the projection of the slag collection basket, and the spacing is no more than 20 mm.

[0015] In the utility model, a heating element for heating washing water is arranged in the water return area and is located below the water pump. The heating element is arranged here, rather than being arranged beside the water pump and the slag collection basket, which can not only further reduce the space of the water return area and save water, but also effectively reduce heat loss and improve heating efficiency.

[0016] Preferably, the bottom wall of the water pump is provided with a water inlet, and a water absorption area is formed between the bottom wall of the water pump and the bottom wall in the return water area. The heating element is an annular heating tube, which is suspended in the water absorption area and arranged corresponding to the periphery of the water inlet.

[0017] As another preferred structure of the return water area, a heating element for heating washing water is also provided in the return water area. From a top view, the water pump, the slag collecting basket and the heating element are arranged in a herringbone structure. The side walls of the return water area are surrounded by the periphery of the herringbone structure. The water outlet of the water pump extends to the central part of the herringbone structure and is connected to the lower end of the water pipe located there.

[0018] Preferably, the return water area has three corners, and each corner and the adjacent straight side part respectively constrain the first installation area, the second installation area, and the third installation area. The first installation area is used to install the water pump, the second installation area is used to install the heating element, and the third installation area is used to install the slag collection basket. The first installation area, the second installation area, and the third installation area are all semi-enclosed areas. That is: the first corner of the triangular return water area and the adjacent straight side part enclose the first installation area for installing the water pump, the second corner of the triangular structure and the adjacent straight side part enclose the second installation area for installing the heating element, and the third corner of the triangular structure and the adjacent straight side part enclose the third installation area for installing the slag collection basket. The return water area is divided into blocks using the corners of the triangular structure, and the installation requirements of each area are clarified, so that the water pump, the slag collection basket, and the heating element can be installed compactly in the return water area, thereby making full use of the installation space to reduce the overall volume of the return water area, thereby saving water and improving water efficiency.

[0019] Preferably, the water return area is a triangular structure with a smooth transition at the corner, including a first straight side, a second straight side, and a third straight side connected end to end, and each straight side is smoothly connected by an arc segment at the intersection. The sharp corners of the triangle cannot be used and may cause slag jam. The corners of the triangular structure are set as arc segments. On the one hand, it avoids slag jam, and on the other hand, it is easy to adapt to the various functional parts that are basically circular, further improving the space utilization rate.

[0020] Preferably, the first straight edge and the second straight edge are connected at the intersection by a first arc segment, the main body of the water pump is disc-shaped, and the first arc segment cooperates with the outer edge of the disc-shaped main body to form a radial limit. The first arc segment is exactly matched with the disc-shaped main body of the water pump, which not only reduces the assembly gap between the two and saves assembly space, but also the shapes of the first arc segment and the main body of the water pump are mutually matched and constrained, which facilitates the installation of the water pump.

[0021] Preferably, the second straight edge is connected to the third straight edge at the intersection by a second arc segment, the heating element is disc-shaped, and the second arc segment is matched with the outer edge of the disc-shaped heating element. Further preferably, the second arc segment is arranged concentrically with the circle where the edge of the heating element is located. The above structure not only saves assembly space, but also the inner wall of the return water area corresponding to the second arc segment can guide the return water so that it converges to the heating element and then is sucked into the water pump, which is conducive to improving the heating effect.

[0022] Preferably, the first straight edge and the third straight edge are connected at the intersection by a third arc segment, the slag collecting basket is cylindrical, and the third arc segment is adapted to the outer wall surface of the cylindrical slag collecting basket. Further preferably, the third arc segment is arranged concentrically with the circle where the edge of the slag collecting basket is located. The above structure not only saves assembly space, but also the inner wall of the return water area corresponding to the third arc segment can guide the return water to avoid the return water from being retained outside the slag collecting basket, so as to avoid the accumulation of residue outside the slag collecting basket, thereby improving the slag collection effect and return water efficiency.

[0023] Preferably, the water return area is arranged in the center of the bottom wall of the cleaning machine, the second straight edge is arranged parallel to the first edge of the bottom wall of the cleaning machine, the third installation area is arranged corresponding to the central part of the second edge of the bottom wall of the cleaning machine, and the second edge is arranged opposite to the first edge. The above structure is adopted to maximize the water return efficiency, slag collection efficiency and heating efficiency.

[0024] In the present invention, the water pump comprises a pump casing and an impeller, the pump casing is arranged in the first installation area and has a water inlet at the bottom, the pump casing is provided with the water outlet at the side, and the impeller is rotatably arranged in the pump casing and used to provide water pumping power. The impeller is a centrifugal impeller, which is used to pump out the return water after circumferential pressurization, so as to maintain a high jet head of the outlet water.

[0025] Preferably, a driving member for driving the impeller to rotate is provided below the return water area, and a power output shaft of the driving member extends from bottom to top into the return water area and further passes through the water inlet to be connected with the impeller.

[0026] Preferably, a water suction area is formed between the bottom wall of the pump housing and the bottom wall in the water return area, and a water suction port for returning water to enter the water suction area is formed on the side of the first installation area facing the second installation area and the third installation area. The utility model utilizes the modeling characteristics of the triangular structure itself, and after the water pump is installed in the first installation area, a water suction port toward the slag collection basket and the heating element is automatically formed, avoiding or reducing the return water from directly participating in the reflux from the outside of the water pump, but making part of the return water return through the slag collection basket to improve the slag collection effect, and part of the return water return through the heating element to improve the heating efficiency.

[0027] Preferably, the bottom wall of the pump housing is provided with water retaining ribs for gathering the return water from the second installation area and the third installation area to the water inlet, and the water retaining ribs are arranged in a semi-encircling manner toward the water suction port. This structure is conducive to further avoiding the return water from directly participating in the reflux from the outside of the water pump, but rather refluxes through the slag collection basket and the heating element, taking into account better slag collection effect and heating efficiency.

[0028] Preferably, the water pump includes a pump casing and an impeller arranged in the pump casing, a water inlet is provided at the bottom of the pump casing, a flow channel extending spirally outward in the circumferential direction is provided on the side of the pump casing, and the water outlet is formed at the end of the flow channel, the distance from the center of the impeller to the center of the water outlet is L', the radius of the water outlet is r, the base circle radius of the outer spiral line at the starting end of the flow channel is R1, and L'≥R1+r. Further preferably, the radius of the circle obtained by taking the center of the return water area as the center of the circle and the maximum distance from the center of the return water area to the edge as the radius is R', and L'≤R'. The above structure is adopted to make the matching accuracy of the parameters and structures of the water pump better, and comprehensively realize the effects of improving the water pumping efficiency and reducing vibration and noise.

[0029] From a top view, the geometric center of the water return area and / or the geometric center of the bottom of the box body falls within the outer circle of the water guide pipe to improve the water return efficiency and slag collection effect.

[0030] In order to facilitate production and assembly, a water cup is arranged at the bottom of the box body, and the water return area is formed in the water cup.

[0031] Compared with the prior art, the utility model has the following advantages: the utility model arranges the water pump and the slag collecting basket adjacent to each other and arranges the whole of the two relatively centrally at the bottom of the box; the water pump itself is offset relative to the central part of the box; an offset water outlet is provided on the water pump to guide the outlet water to the central part of the box and then transport it to the spray arm through the water pipe; the offset water pump structure above concedes the space in the central part of the bottom of the box for the slag collecting basket, so that the slag collecting basket can be relatively centered at the bottom of the box, which is beneficial to improving the slag collecting effect; at the same time, it is convenient to make the return water area into a compact structure enclosed by the water pump and the periphery of the slag collecting basket, thereby greatly reducing the space of the return water area, saving water consumption, and being beneficial to improving the return water speed and water efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the cleaning machine in Example 1 of the utility model (top view);

[0033] Figure 2 for Figure 1 The structural diagram at the bottom;

[0034] Figure 3 for Figure 2 A cross-sectional view of

[0035] Figure 4 for Figure 2 Schematic diagram of the structure of the water pump;

[0036] Figure 5 for Figure 4 Schematic diagram of the bottom structure;

[0037] Figure 6 for Figure 4 A cross-sectional view of

[0038] Figure 7 This is a schematic diagram of the structure of the cleaning machine in Example 2 of the utility model (top view);

[0039] Figure 8 for Figure 7 Exploded diagram of

[0040] Fig. 9 for Figure 7 Schematic diagram of the structure of the water pump;

[0041] Fig.10 for Fig. 9 It is a schematic diagram of the bottom structure;

[0042] Fig.11 It is a schematic diagram of the structure of the lower part of the water pump casing. DETAILED DESCRIPTION

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0044] Embodiment 1:

[0045] like Figures 1 to 6 As shown, the cleaning machine of this embodiment includes a box body 1, a water pump 3, a slag collecting basket 4, and a bottom spray arm 7. A concave return water area 21 is provided at the bottom of the box body 1, and the water pump 3 and the slag collecting basket 4 are both arranged in the return water area 21. The bottom spray arm 7 is arranged above the return water area 21 and is connected to the water pump 3 through a water pipe 32. The water pipe 32 is centrally arranged in the lower part of the box body 1 and extends vertically. The water pump 3 and the slag collecting basket 4 are adjacently arranged under the water pipe 32. The water pump 3 is provided with a water outlet 31 which is offset relative to the center of the water pump 3 and is connected to the lower end of the water pipe 32.

[0046] In this embodiment, the lower end of the water pipe 32 is arranged in the area between the main part of the water pump 3 and the slag collecting basket 4. The diameter of the water pipe 32 is basically consistent with the diameter of the bottom wall inlet of the bottom spray arm 7, which is much smaller than the diameter of the main part of the water pump 3 and the slag collecting basket 4. The water pipe 32, the water pump 3, and the slag collecting basket 4 are arranged in the above position relationship, which can more reasonably utilize the space and make the three compactly arranged, so as to shorten the return water stroke on the basis of reducing the volume of the return water area 21.

[0047] The return water area 21 is arranged in the center of the bottom of the box body 1, and the top of the return water area 21 is covered with a filter plate 210. From a top view, the return water area 21 is a rectangular structure, the water pump 3 and the slag collection basket 4 are arranged side by side and adjacent, the heating element 5 is arranged under the water pump, and the side wall of the return water area 21 is surrounded by the water pump 3 and the slag collection basket 4. The water pump 3 is provided with an offset water outlet 31, which extends to the central part of the return water area 21 and is arranged close to the side wall of the slag collection basket 4. The water pump 3 is offset relative to the center of the bottom wall of the box body 1, and the water outlet 31 of the water pump 3 is arranged corresponding to the central part of the bottom of the box body 1. The slag collection basket 4 is closer to the center of the bottom wall of the box body 1 than the water flow system of the existing dishwasher.

[0048] Specifically, the return water area 21 has a relative length and width, and the length is greater than the width. The slag basket 4 is arranged close to the inner wall of the return water area 21 in the first width direction, and the water pump 3 is arranged close to the inner wall of the return water area 21 in the second width direction. The slag basket 4 is cylindrical, and the main part of the water pump 3 is also disc-shaped. After the two are arranged side by side and adjacent to each other, the minimum space occupied needs to have a certain length and width, and the length is greater than the width, so as to make fuller use of the space of the return water area 21, improve the return water efficiency, and save water. The water pump 3 and the slag basket 4 are arranged side by side along the length direction of the rectangular structure, and the inner wall of the rectangular structure in the first width direction is arranged close to the outer wall of the slag basket 4.

[0049] The slag collecting basket 4 is a cylindrical structure, and the inner wall of the rectangular structure in the first width direction is formed as an arc surface 211 surrounding the outer side of the cylindrical structure. With such a structure, on the basis of further saving the space of the return water area 21, the return water volume of the outer part of the slag collecting basket 4 can be reduced, and the return water is filtered from the side wall of the slag collecting basket 4 close to the water pump and then sucked into the water pump 3, which is conducive to improving the slag collecting effect and the return water efficiency.

[0050] In this embodiment, a water inlet 33 is provided at the bottom of the water pump 3, and a flow channel 34 extending spirally toward the central part of the return water area 21 is provided on the side of the water pump 3, and the end of the flow channel 34 forms the above-mentioned water outlet 31. The spirally extended flow channel 34 pressurizes the return water on the one hand, and on the other hand, extends the water outlet 31 to the central part of the return water area 21 in the process of throwing out the return water, so that when the water pump 3 is offset relative to the bottom of the cleaning machine, the water outlet 31 is arranged in the center relative to the bottom of the cleaning machine, meeting the requirement of arranging the bottom spray arm in the center.

[0051] The water outlet 31 of the water pump 3 is connected to a water pipe 32 extending from bottom to top, and a bottom spray arm 7 connected to the upper end of the water pipe 32 is provided in the washing chamber 11. A flow guide curved surface 35 with a smooth transition from bottom to top is formed at the junction between the lower end of the water pipe 32 and the water outlet 31. This structure is conducive to reducing the energy loss of the fluid during the reversing process to maintain a large water pressure and injection head. The side wall of the water pump 3 is provided with a side outlet arranged opposite to the water outlet 31, and a top spray arm (not shown in the figure) connected to the side outlet is provided in the washing chamber.

[0052] In this embodiment, the water pump 3 of this embodiment includes a pump housing 36 and an impeller 37. A water outlet 31 is provided on the side of the pump housing 36. The impeller 37 is rotatably provided in the pump housing 36 and is used to provide water pumping power. The impeller 37 is a centrifugal impeller, which is used to pump out the return water after circumferential pressurization to maintain a high injection head of the outlet water. A driving member 6 for driving the impeller 37 to rotate is provided below the return water area 21. The driving member 6 is a motor. The power output shaft 61 of the driving member 6 extends from bottom to top into the return water area 21 and further passes through the water inlet 31 to be connected with the impeller 37.

[0053] like Figure 3 As shown, a water absorption area 201 is formed between the bottom wall of the pump housing 36 and the inner bottom wall of the return water area 21, and the heating element 5 is arranged in the water absorption area 201. Placing the heating element 5 in the return water area 21, rather than arranging the heating element 5 beside the water pump 3 and the slag collecting basket 4, can not only further reduce the space of the return water area 21 and save water, but also effectively reduce heat loss and improve heating efficiency. The heating element 5 of this embodiment is an annular heating tube, which is suspended in the water absorption area 21 and arranged corresponding to the periphery of the water inlet 33; the annular heating tube 5 is an open-loop structure disconnected in the middle, and the ends of the open-loop structure are respectively provided with connecting parts 51 that pass through the side of the return water area 21 and are connected to the power supply.

[0054] The slag collecting basket 4 is cylindrical, and the main part of the water pump 3 in this embodiment is disc-shaped. After the two are arranged side by side and adjacent to each other, the minimum space occupied needs to have a certain length and width, and the length is greater than the width. The return water area 21 with an adaptive rectangular structure is adopted to make more full use of the space of the return water area 21, improve the return water efficiency, and save water. In the return water area 21 with a rectangular structure, the inner wall of the return water area 21 in the first width direction is formed as a circular arc surface 211 surrounding the outer side of the slag collecting basket 4. This structure is conducive to the loss of fluid energy in the return water process and improves the water pressure and lift.

[0055] The side wall of the water pump 3 of this embodiment is provided with a water guide pipe section 38 which is tangentially connected thereto, and the side wall of the water return area 21 is provided with a water outlet opening for the water of the water guide pipe section 38 to flow out. The connection between the water guide pipe section 38 and the pump chamber of the water pump 3 and the connection between the flow channel 34 and the pump chamber of the water pump 3 are arranged oppositely in the circumferential direction. The water flow led out of the water guide pipe section 38 can be used to supply the upper spray arm of the cleaning machine. The above structure can balance the water output and reduce the noise generated by the shaking of the water pump on the basis of facilitating the diversion of water. The water outlet opening is provided on the side wall of the water return area 21 away from the slag collection basket 4.

[0056] In this embodiment, the water pump 3 and the slag collecting basket 4 are arranged side by side and adjacent to each other, and the heating element 5 is arranged under the water pump, so that the return water area 21 can be made into a compact rectangular structure enclosed in the periphery of the water pump 3 and the slag collecting basket 4, which greatly reduces the space of the return water area 21, saves water, and improves the return water speed and water efficiency; the offset water outlet 31 of the water pump 3 guides the outlet water to the edge of the water pump 3, and the water pump 3 is offset at the bottom of the cleaning machine to achieve the central arrangement of the water outlet 31. Based on this, the slag collecting basket 4 can also be more centered at the bottom of the cleaning machine, which is conducive to improving the slag collecting effect and further improving the return water effect.

[0057] Embodiment 2:

[0058] like Figures 7 to 11 As shown, in order to facilitate production and manufacturing, a water cup 2 can be installed at the bottom of the box body 1, and a return water area 21 is formed in the water cup 2. The heating element 5 of this embodiment is a disc-shaped heating disc structure. From a top view, the return water area 21 is a triangular structure, and the water pump 3, the slag collection basket 4, and the heating element 5 are respectively arranged near a corner of the triangular structure. The water pump 3 is provided with an offset water outlet 31 and the water outlet 31 extends to the central part of the triangular structure. The water pump 3 is offset relative to the center of the bottom wall of the box body 1, and the water outlet 31 of the water pump 3 is arranged corresponding to the central part of the bottom of the box body 1. The center of the triangular structure coincides with the center of the bottom of the box body 1, and the water outlet 31 is located at the center.

[0059] The bottom of the water pump 3 is provided with a water inlet 33, and the side of the water pump 3 is provided with a flow channel 34 that spirally extends toward the central part of the triangular structure, and the end of the flow channel 34 forms the above-mentioned water outlet 31. The spirally extended flow channel 34, on the one hand, pressurizes the return water, and on the other hand, extends the water outlet 31 to the center of the triangular structure in the process of throwing out the return water, so that when the water pump 3 is offset relative to the bottom of the cleaning machine, the water outlet 31 is arranged in the center relative to the bottom of the cleaning machine, meeting the requirement of arranging the bottom spray arm in the center.

[0060] A water guide pipe 32 extending upward is connected to the water outlet 31 of the water pump 3, and a spray arm (not shown in the figure) communicating with the upper port of the water guide pipe 32 is arranged in the washing cavity 11. A diversion curved surface 35 with a smooth transition from bottom to top is formed at the connection of the lower end of the water guide pipe 32 and the water outlet 31. This structure is beneficial to reducing the energy loss during the fluid commutation process to maintain a relatively large water pressure and spray lift.

[0061] In this embodiment, the water pump 3, the slag collection basket 4, and the heating element 5 are arranged in a "pin" shape in the water return area 21, and a remaining space 211a is formed in the central part of this "pin" shape structure, and the water outlet 31 is located in the remaining space 211a.

[0062] Specifically, each corner of the triangular structure respectively restricts a first installation area 10, a second installation area 20, and a third installation area 30 with its adjacent straight-edge part. The first installation area 10 is used to install the water pump 3, the second installation area 20 is used to install the heating element 5, and the third installation area 30 is used to install the slag collection basket 4. A drain port is opened at the bottom of the third installation area 30. The first installation area 10, the second installation area 20, and the third installation area 30 are all semi-surrounding areas. That is: the first corner of the triangular structure and its adjacent straight-edge part enclose the first installation area 10 for installing the water pump 3, the second corner of the triangular structure and its adjacent straight-edge part enclose the second installation area 20 for installing the heating element 5, and the third corner of the triangular structure and its adjacent straight-edge part enclose the third installation area 30 for installing the slag collection basket 4. The water return area is segmented by each corner of the triangular structure to clarify the installation requirements of each area, making the installation of the water pump 3, the slag collection basket 4, and the heating element 5 compact in the water return area 21, thereby making full use of the installation space to reduce the overall volume of the water return area 21, and further saving water consumption and improving water efficiency.

[0063] The triangular structure of this embodiment includes a first straight edge 201, a second straight edge 202, and a third straight edge 203 that are connected end to end, and the straight edges are smoothly connected by arc segments at the intersection. The pointed parts of the triangle cannot be utilized and may cause slag jamming. The corners of the triangular structure are set as arc segment structures. On the one hand, it avoids slag jamming. On the other hand, it is also convenient to adapt to the generally circular functional components, further improving the space utilization rate. In addition, setting the corners of the triangular structure as arc segment structures is not only more beautiful but also beneficial to increasing the strength of the water cup and reducing the manufacturing difficulty.

[0064] The first straight edge 201 and the second straight edge 202 are connected at the intersection by the first arc segment 01. The main part of the water pump 3 is disc-shaped, and the first arc segment 01 cooperates with the outer edge of the disc-shaped main part to form a radial limit. The first arc segment 01 is exactly adapted to the disc-shaped main part of the water pump 3, which can not only reduce the assembly gap between the two, reduce the water flow away from the slag basket, improve the slag collection effect, and save assembly space, but also the first arc segment 01 and the main part of the water pump 3 are mutually adapted and constrained, which is convenient for installing the water pump 3. Avoid or reduce the return water from directly participating in the return from the assembly gap outside the water pump 3, but make part of the return water return through the slag collection basket 4, so as to improve the slag collection effect.

[0065] The second straight edge 202 and the third straight edge 203 are connected at the intersection by the second arc segment 02. The heating element 5 is disc-shaped, and the second arc segment 02 is adapted to the outer edge of the disc-shaped heating element 5. The second arc segment 02 is arranged concentrically with the circle where the edge of the heating element 5 is located. The above structure not only saves assembly space, but also the inner wall of the return water area 21 corresponding to the second arc segment 02 can guide the return water so that it converges to the heating element 5 and then is sucked into the water pump 3, which is conducive to improving the heating effect.

[0066] The first straight edge 201 and the third straight edge 203 are connected at the intersection by the third arc segment 03. The slag collecting basket 4 is cylindrical, and the third arc segment 03 is adapted to the outer wall surface of the cylindrical slag collecting basket 4. The third arc segment 03 is arranged concentrically with the circle where the edge of the slag collecting basket 4 is located. The above structure not only saves assembly space, but also the inner wall of the return water area 21 corresponding to the third arc segment 03 can guide the return water to avoid the return water from being retained outside the slag collecting basket 4, so as to avoid the accumulation of residue outside the slag collecting basket 4, thereby improving the slag collection effect and return water efficiency.

[0067] The first straight edge 201 and the second straight edge 202 corresponding to the first installation area 10 are connected at the intersection through the first arc segment 01, the second straight edge 202 and the third straight edge 203 corresponding to the second installation area 20 are connected at the intersection through the second arc segment 02, and the first straight edge 201 and the third straight edge 203 corresponding to the third installation area 30 are connected at the intersection through the third arc segment 03, and the circle diameters corresponding to the first arc segment 01 and the second arc segment 02 are greater than the circle diameter corresponding to the third arc segment 03. In this embodiment, the outer diameters of the water pump 3 and the heating element 5 are larger and the outer diameters of the two are equivalent, and the outer diameter of the slag collection basket 4 is smaller. The above structure is adopted to make the side walls of each corner of the triangular structure fit with the corresponding functional parts, maximize the use of the space of the return water area 21, and improve the return water efficiency.

[0068] In this embodiment, if Figure 7As shown, the water return area 21 is arranged in the center of the bottom wall of the cleaning machine, the second straight edge 202 is arranged parallel to the first edge 101 of the bottom wall of the cleaning machine, the third installation area 30 is arranged corresponding to the central part of the second edge 102 of the bottom wall of the cleaning machine, and the second edge 102 is arranged opposite to the first edge 101. The above structure is adopted to maximize the water return efficiency, slag collection efficiency, and heating efficiency.

[0069] The water pump 3 of this embodiment includes a pump housing 36 and an impeller 37. The pump housing 36 is arranged in the first installation area 10 and has a water inlet 33 at the bottom. The pump housing 36 has a water outlet 31 on the side. The impeller 37 is rotatably arranged in the pump housing 36 and is used to provide water pumping power. The impeller 37 is a centrifugal impeller, which is used to pump out the return water after circumferential pressurization to maintain a high injection head of the outlet water. A driving member 6 for driving the impeller 37 to rotate is arranged below the return water area 21. The driving member 6 is a motor. The power output shaft 61 of the driving member 6 extends from bottom to top into the return water area 21 and further passes through the water inlet 31 to be connected with the impeller 37.

[0070] A water suction area is formed between the bottom wall of the pump housing 36 and the inner bottom wall of the water return area 21, and a water suction port 360 for returning water to enter the water suction area is formed on the side of the first installation area 10 facing the second installation area 20 and the third installation area 30. This embodiment utilizes the modeling characteristics of the triangular structure itself, and after the water pump 3 is installed in the first installation area 10, a water suction port 360 is automatically formed toward the slag collection basket 4 and the heating element 5, so as to avoid or reduce the return water from directly participating in the return flow from the outside of the water pump 3, and instead, part of the return water is returned through the slag collection basket 4 to improve the slag collection effect, and part of the return water is returned through the heating element 5 to improve the heating efficiency.

[0071] The bottom wall of the pump housing 36 is provided with a water retaining rib 39 for gathering the return water from the second installation area 20 and the third installation area 30 to the water inlet 33, and the water retaining rib 39 is arranged in a semi-encircling manner toward the water suction port 360. This structure is conducive to further avoiding the return water from directly participating in the reflux from the outside of the water pump 3, but rather refluxes through the slag collection basket 4 and the heating element 5, taking into account better slag collection effect and heating efficiency.

[0072] In this embodiment, the return water area 21 is set as a triangular structure, and the water pump 3, the slag collecting basket 4, and the heating element 5 are installed in each corner area of ​​the triangular structure respectively, and then the outlet water is guided to the remaining space 211 in the central part of the triangular structure through the offset water outlet 31 of the water pump 3, so that the space of the return water area 21 is utilized to the maximum extent. The overall structure is compact, which not only greatly reduces the volume of the return water area 21, which is beneficial to saving the amount of washing water each time, but also helps to improve the return water speed and water efficiency; because the water pump 3 no longer occupies the central part of the bottom of the cleaning machine, the slag collecting basket 4 can be closer to the central part of the bottom of the cleaning machine, which is beneficial to improve the slag collecting effect.

[0073] Embodiment 3:

[0074] In this embodiment, the centers of the projections of the water pump 3 , the water pipe 32 , and the slag collecting basket 4 in the horizontal plane are located on the same straight line, and the projection of the water pump 3 and the projection of the slag collecting basket 4 are located on both sides of the projection of the water pipe 32 .

[0075] Specifically, the projection of the water pipe 32 is tangent to at least one of the projection of the water pump 3 and the projection of the slag collecting basket 4. For example, the projection of the water pipe 32 is tangent to the projection of the water pump 3 and the projection of the slag collecting basket 4, or the projection of the water pipe 32 is tangent to the projection of the slag collecting basket 4 and partially overlaps with the projection of the water pump 3.

[0076] Embodiment 4:

[0077] The difference between this embodiment and the third embodiment is that there is a spacing between the projection of the water pipe 32 and the projection of the water pump 3 and the projection of the slag collecting basket 4, and the spacing is not greater than 20 mm.

[0078] Embodiment 5:

[0079] On the basis of Example 2, the water pipe 32 is vertically arranged in the central area O at the lower part of the box body 1, the water pump 3 and the slag collecting basket 4 are located below the water pipe 32, and the water outlet 31 is connected to the lower end of the water pipe 32. The length of the bottom of the box body 1 is L and the width is W. From a top view, the central area O is centered on the center of the box body 1, and the radius of the central area O is R = (0.15-0.45)(L, W) min . Among them, (L,W) min is the minimum value among L and W.

[0080] Embodiment 6:

[0081] The water pump 3 described in the embodiment of the present invention is provided with a water outlet 31 offset relative to the center of the water pump 3. The "center offset" mentioned here only refers to the center offset (i.e., the offset in the horizontal direction) without considering the vertical offset (i.e., the offset in the height direction).

[0082] The water pump 3 includes a pump housing 36 and an impeller 37 disposed in the pump housing 36. A water inlet 33 is provided at the bottom of the pump housing 36. A flow channel 34 extending outward in a spiral along the circumferential direction is provided on the side of the pump housing 36, and a water outlet 31 is formed at the end of the flow channel 34. The distance from the center of the impeller 37 to the center of the water outlet 31 is L', the radius of the water outlet 31 is r, and the base circle radius of the outer spiral line at the starting end of the flow channel 34 is R1, L'≥R1+r. The radius of the circle obtained by taking the center of the return water area 21 as the center of the circle and the maximum distance from the center of the return water area 21 to the edge as the radius is R', L'≤R'.

[0083] Embodiment 7:

[0084] like Figure 7As shown, based on Example 2, from a top view, the geometric center of the return water area 21 (i.e., the center of the circumscribed circle) and the geometric center of the bottom of the box body 1 (i.e., the center of the circumscribed circle) both fall within the outer circle of the water pipe 32 to improve the return water efficiency and slag collection effect.

[0085] 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 (3), a slag collection basket (4), and a spray arm, wherein a concave water return area (21) is provided at the bottom of the housing (1), the water pump (3) and the slag collection basket (4) are both arranged in the water return area (21), the spray arm is arranged above the water return area (21) and is connected to the water pump (3) through a water guide pipe (32), and is characterized in that: The water pump (3) is arranged adjacent to the slag collecting basket (4) in the water return area (21), and the water pump (3) is provided with a water outlet (31) which is offset relative to the center of the water pump (3) and is connected to the water inlet end of the water guide pipe (32).

2. The cleaning machine according to claim 1, characterized in that: The water pipe (32) is vertically arranged in the central area of ​​the lower part of the box body, the water pump (3) and the slag collecting basket (4) are located below the water pipe (32), and the water outlet (31) is connected to the lower end of the water pipe (32).

3. The cleaning machine according to claim 2, characterized in that: The length of the bottom of the box is L, and the width is W. From a top view, the central area is centered on the center of the box, and the radius of the central area is R = (0.15-0.45) (L, W) min .

4. The cleaning machine according to claim 1, characterized in that: The lower end of the water guide pipe (32) is arranged corresponding to the area between the main body of the water pump (3) and the slag collecting basket (4).

5. The cleaning machine according to claim 4, characterized in that: The water return area (21) has a relative length and width, and the length is greater than the width. The slag collecting basket (4) is arranged close to the inner wall of the water return area (21) in a first width direction, and the water pump (3) is arranged close to the inner wall of the water return area (21) in a second width direction.

6. The cleaning machine according to claim 5, characterized in that: When viewed from above, the water return area (21) is a rectangular structure, the water pump (3) and the slag collecting basket (4) are arranged side by side along the length direction of the rectangular structure, and the inner wall of the rectangular structure in the first width direction is arranged close to the outer wall of the slag collecting basket (4).

7. The cleaning machine according to claim 6, characterized in that: The slag collecting basket (4) is a cylindrical structure, and the inner wall of the rectangular structure in a first width direction is formed as an arc surface (211) surrounding the outer side of the cylindrical structure.

8. The cleaning machine according to claim 4, characterized in that: The centers of the projections of the water pump (3), the water pipe (32) and the slag collecting basket (4) in the horizontal plane are located on the same straight line, and the projection of the water pump (3) and the projection of the slag collecting basket (4) are respectively located on both sides of the projection of the water pipe (32).

9. The cleaning machine according to claim 8, characterized in that: The projection of the water guide pipe (32) is tangent to at least one of the projection of the water pump (3) and the projection of the slag collecting basket (4).

10. The cleaning machine according to claim 8, characterized in that: There is a spacing between the projection of the water guide pipe (32) and the projection of the water pump (3) and the projection of the slag collecting basket (4), and the spacing is no greater than 20 mm.

11. The cleaning machine according to any one of claims 1 to 10, characterized in that: A heating element (5) for heating washing water is provided in the water return area (21) and is located below the water pump (3).

12. The cleaning machine according to claim 11, characterized in that: The bottom wall of the water pump (3) is provided with a water inlet (33), and a water absorption area is formed between the bottom wall of the water pump (3) and the inner bottom wall of the return water area (21). The heating element (5) is an annular heating tube, which is suspended in the water absorption area and arranged corresponding to the periphery of the water inlet (33).

13. The cleaning machine according to claim 1, characterized in that: The return water area (21) is also provided with a heating element (5) for heating washing water. When viewed from a top view, the water pump (3), the slag collecting basket (4) and the heating element (5) are arranged in a herringbone structure. The side walls of the return water area (21) surround the periphery of the herringbone structure. The water outlet (31) of the water pump (3) extends to the central part of the herringbone structure and is connected to the lower end of the water guide pipe (32) located there.

14. The cleaning machine according to claim 13, characterized in that: The water return area (21) has three corners, and each corner and its adjacent straight edge portion respectively constrain a first installation area (10), a second installation area (20), and a third installation area (30); the first installation area (10) is used to install a water pump (3), the second installation area (20) is used to install a heating element (5), and the third installation area (30) is used to install a slag collection basket (4).

15. The cleaning machine according to claim 14, characterized in that: The water return area (21) is a triangular structure with a smooth transition at the corners, comprising a first straight side (201), a second straight side (202), and a third straight side (203) connected end to end, and each straight side is smoothly connected through an arc segment at the intersection.

16. The cleaning machine according to claim 15, characterized in that: The first straight edge (201) and the second straight edge (202) are connected at the intersection by a first arc segment (01); the main body of the water pump (3) is disc-shaped; the first arc segment (01) cooperates with the outer edge of the disc-shaped main body to form a radial limit.

17. The cleaning machine according to claim 15, characterized in that: The second straight edge (202) and the third straight edge (203) are connected at the intersection by a second arc segment (02); the heating element (5) is in the shape of a circular disc; and the second arc segment (02) is adapted to the outer edge of the circular disc-shaped heating element (5).

18. The cleaning machine according to claim 17, characterized in that: The second arc segment (02) is arranged concentrically with the circle where the edge of the heating element (5) is located.

19. The cleaning machine according to claim 15, characterized in that: The first straight edge (201) and the third straight edge (203) are connected at the intersection by a third arc segment (03); the slag collecting basket (4) is cylindrical; and the third arc segment (03) is adapted to the outer wall surface of the cylindrical slag collecting basket (4).

20. The cleaning machine according to claim 19, characterized in that: The third arc segment (03) is arranged concentrically with the circle where the edge of the slag collecting basket (4) is located.

21. The cleaning machine according to claim 15, characterized in that: The water return area (21) is arranged in the center of the bottom wall of the cleaning machine, the second straight edge (202) is arranged parallel to the first edge (101) of the bottom wall of the cleaning machine, the third installation area (30) is arranged corresponding to the central part of the second edge (102) of the bottom wall of the cleaning machine, and the second edge (102) is arranged opposite to the first edge (101).

22. A cleaning machine according to any one of claims 14 to 21, characterized in that: The water pump (3) comprises a pump casing (36) and an impeller (37). The pump casing (36) is arranged in the first installation area (10) and has a water inlet (33) at the bottom. The water outlet (31) is arranged on the side of the pump casing (36). The impeller (37) is rotatably arranged in the pump casing (36) and is used to provide water pumping power.

23. The cleaning machine according to claim 22, characterized in that: A water suction area is formed between the bottom wall of the pump housing (36) and the inner bottom wall of the return water area (21), and a water suction port (360) for supplying return water into the water suction area is formed on the side of the first installation area (10) facing the second installation area (20) and the third installation area (30).

24. The cleaning machine according to claim 23, characterized in that: The bottom wall of the pump housing (36) is provided with a water retaining rib (38) for gathering return water from the second installation area (20) and the third installation area (30) toward the water inlet (33); the water retaining rib (38) is arranged in a semi-encircling manner toward the water suction port (360).

25. The cleaning machine according to claim 1, characterized in that: The water pump comprises a pump casing (36) and an impeller (37) arranged in the pump casing. A water inlet (33) is provided at the bottom of the pump casing (36). A flow channel extending outward in a spiral along the circumferential direction is provided on the side of the pump casing (36), and the end of the flow channel forms the water outlet (31). The distance from the center of the impeller to the center of the water outlet is L', the radius of the water outlet is r, the base circle radius of the outer spiral line at the starting end of the flow channel is R, and L'≥R+r.

26. The cleaning machine according to claim 25, characterized in that: The radius of the circle obtained by taking the center of the backwater area as the center and the maximum distance from the center to the edge of the backwater area as the radius is R', and L'≤R'.

27. The cleaning machine according to any one of claims 1 to 10, characterized in that: From a top view, the geometric center of the water return area (21) and / or the geometric center of the bottom of the box body (1) falls within the outer circle of the water guide pipe (32).

28. The cleaning machine according to any one of claims 1 to 10, characterized in that: A water cup is arranged at the bottom of the box body, and the water return area is formed in the water cup.

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