A cleaning machine

Abstract

The present invention relates to a cleaning machine, comprising a plastic water tank body with a washing chamber, and also comprising a metal reinforcement, wherein the metal reinforcement is arranged on the inner wall surface of the upper part of the water tank body, a first reinforcement rib is arranged at least in the middle of the outer peripheral wall of the water tank body, and a plurality of spaced protrusions are arranged at least in the lower part of the inner wall surface of the water tank body. The present invention manufactures the water tank body with plastic, which has strong plasticity, and is convenient for deepening the depth of the tank body according to needs, and also greatly reduces the production cost; the metal reinforcement, the first reinforcement rib and the protrusion can all improve the strength of the tank body and prevent the water tank body from being deformed by heat or cold; the metal reinforcement can also accelerate the condensation of steam at the bottom of the washing chamber; the protrusion can also resonate with the ultrasonic sounding device at the bottom of the water tank cleaning machine to improve the ultrasonic cleaning effect; the outer wall surface of the water tank body can play a shockproof and soundproof effect.

Description

Technical Field

[0001] The invention relates to a kitchen appliance, in particular to a washing machine for washing dishes, vegetables or fruits. Background Art

[0002] As people's living standards continue to improve, dishwashers, as a kitchen appliance, are increasingly entering households. Dishwashers on the market are generally divided into three types: tabletop, cabinet, and tank. Among them, tabletop dishwashers are integrated independent structures and are generally placed on the table for use; cabinet dishwashers are also independent structures, but need to be embedded in kitchen cabinets for use; tank dishwashers are combined with sinks and are generally installed in kitchen cabinets for use.

[0003] At present, the structure of the relatively mature water tank type cleaning machine on the market is mainly as described in the Chinese patent "Water Tank Type Cleaning Machine" (application number: CN201310750968.1) with the authorization announcement number CN104224074B, that is, it includes a box body forming a washing space, the box body includes a water tank body and a cover plate rotatably connected to the water tank body, the bottom of the water tank body has a concave drain area at least in the central part, and the drain area is provided with a water pump that pumps the water in the drain area out to the washing space above the drain area, the drain area is covered with a drain plate with drain holes, and a rotating spray arm connected to the water pump fluid and having a water outlet hole is arranged above the drain plate. By setting a drain area covered with a drain plate and setting the water pump in the drain area, the water pump is isolated from the washing area, so that the water flowing back into the water pump is first filtered by the drain plate.

[0004] The sink body of the above-mentioned existing sink-type cleaning machine is made of stainless steel material, and the processing methods are mainly welding and drawing. Among them, for the welding process, due to the large welding deformation of stainless steel materials, it is difficult to control the dimensional accuracy of the sink, which limits the overall shape of the sink body, resulting in a single structure of the sink body, which in turn restricts the development of more functional structures of the sink-type cleaning machine. In addition, the welding process has extremely high requirements for the welding mold, low welding efficiency and high cost; for the drawing process, the deformation limit of the stainless steel material directly limits the drawing depth of the sink. The sink drawn by the drawing process generally has a depth less than the opening width of the sink. At present, it is difficult for the processes around the world to achieve a drawing depth greater than the opening width of the sink body, which causes the sink to occupy a larger installation space in the kitchen during installation and greatly limits the washing space of the sink. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cleaning machine which adopts a tank body combining plastic and metal so as to deepen the tank body and reduce the production cost in view of the current status of the prior art.

[0006] Another technical problem to be solved by the present invention is to provide a cleaning machine capable of preventing deformation of a plastic tank body, improving the cleaning effect and the condensation effect after cleaning, in view of the current status of the prior art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a cleaning machine, including a sink body with a washing chamber, characterized in that: the sink body is made of plastic material and also includes a metal reinforcement, the metal reinforcement is arranged on the inner wall surface of the upper part of the sink body, the outer peripheral wall of the sink body is provided with a first reinforcement rib at least in the middle part, and the inner wall surface of the sink body is provided with a plurality of spaced protrusions at least in the lower part.

[0008] Preferably, the protrusions are arranged in an array on the inner peripheral wall of the water tank body.

[0009] Preferably, a guide strip extending up and down is convexly provided on the inner wall surface of the metal reinforcement. This structure can guide the condensed water downward, which is conducive to accelerating the condensation of water.

[0010] In order to facilitate installation, a circumferentially arranged receiving groove is provided on the inner wall surface of the upper part of the water tank body, and the metal reinforcement is arranged in the receiving groove. This structure facilitates the positioning and installation of the metal reinforcement.

[0011] Preferably, the metal reinforcement is formed as an annular plate extending up and down in the receiving groove, the upper edge of the annular plate contacts the upper edge of the receiving groove, and the lower edge of the annular plate contacts the lower edge of the receiving groove.

[0012] Further preferably, the upper edge of the annular plate is bent into the accommodating groove to form a first U-shaped structure with an opening facing downward, and the outer side of the first U-shaped structure contacts the inner wall of the accommodating groove, and the lower edge of the annular plate is bent into the accommodating groove to form a second U-shaped structure with an opening facing upward, and the outer side of the second U-shaped structure contacts the inner wall of the accommodating groove, and the annular plate and the first and second U-shaped structures on the annular plate together form a first cavity with the inner wall of the accommodating groove. Since the hot water is mainly sprayed onto the inner wall of the middle and upper part of the water tank body after being sprayed out by the spray arm, and the hot steam rises to the top of the water tank body, the above-mentioned first cavity can improve the thermal insulation performance of the lower part of the water tank body and save energy consumption on the one hand, and on the other hand, it can also play a sound insulation effect to a certain extent.

[0013] Preferably, the outer wall of the annular plate is inwardly concave to form a concave area corresponding to the guide strip. The convex inner and concave outer structure of the guide strip greatly enhances the elasticity of the annular plate. When the ultrasonic cleaning device of the cleaning machine is activated, it forms a strong resonance with the ultrasonic wave to improve the cleaning effect.

[0014] Preferably, a second reinforcing rib is provided on the outer peripheral wall of the water tank body in the area corresponding to the receiving groove. This structure is provided to improve the rigidity of the upper part of the water tank body to prevent the top of the water tank body from being deformed due to high temperature.

[0015] Preferably, the open portion of the water tank body is made of metal at least at the position in contact with the installation plane, and the water tank body portion below is made of plastic. Since the top edge of the water tank body is generally used as the load-bearing position during installation of the current water tank body, the above structure is used to improve the stability of the installation of the water tank body.

[0016] In order to facilitate installation and improve stability after installation, a metal assembly frame for installation and load-bearing is provided on the open periphery of the water tank body.

[0017] Preferably, the open edge extends outward to form a shelf that can be placed on the installation plane, and the metal assembly frame is arranged around the open periphery of the sink body, and its cross section has at least a Z-shaped portion, wherein the lower side of the Z-shape is arranged under the shelf, the vertical side of the Z-shape is arranged outside the periphery of the shelf, and the upper side of the Z-shape gradually extends outward away from the shelf. The upper side of the Z-shaped portion of the metal assembly frame has an outer vertical side that is bent downward at the extended end, and the lowermost end of the outer vertical side is flush with the lower side of the Z-shaped portion. This further improves the stability after installation.

[0018] Preferably, the inner wall of the metal reinforcement is flush with the inner wall surface of the water tank body.

[0019] In the above schemes, an ultrasonic generator is provided at the bottom of the water tank body. This structure can effectively improve the cleaning effect, and the metal reinforcement provided on the upper part of the plastic tank body can resonate with the ultrasonic generator, further improving the ultrasonic cleaning effect.

[0020] Preferably, the first reinforcing ribs are formed into a grid shape and arranged along the circumference of the water tank body. During the washing process of the washing machine, hot water and cold water are often required to be washed alternately, and the deformation degree caused by cold water and hot water on the plastic tank body is different. When hot water is used for washing, the hot steam rises to the upper part of the water tank body, while when cold water is used for washing, the cold water is generally located at the bottom of the water tank body. Therefore, the upper part of the plastic water tank body is easily deformed by high-temperature steam, and the lower part of the water tank body is easily deformed by cold shrinkage, and the cold shrinkage deformation of the lower part of the water tank body is greater than the thermal deformation of the upper part of the water tank body. The above structure can support the water tank body and prevent the water tank body from being deformed due to cold or heat. At the same time, when an ultrasonic sounding device is provided at the bottom of the water tank body, since the ultrasonic wave needs to be transmitted through water as a medium, the dense grid-shaped first reinforcing ribs at the bottom of the water tank body are conducive to the transmission of the ultrasonic wave, thereby improving the cleaning effect.

[0021] As an improvement, a metal strip is embedded in the first reinforcing rib near the lower part of the water tank body, and the metal strip is exposed on the inner wall surface of the water tank body. Since the cold shrinkage deformation of the lower part of the water tank body has a greater impact on the water tank than the thermal deformation of the upper part of the water tank body, the above structure is adopted to embed a metal strip in the first reinforcing rib at the lower part of the water tank body, which can improve the support force of the lower part of the water tank body and prevent the lower part of the water tank body from internal deformation due to cold shrinkage; at the same time, an ultrasonic sounding device is often provided in the water tank cleaning machine, and the above metal strip can resonate with the ultrasonic sounding device to further enhance the ultrasonic cleaning effect.

[0022] As a further improvement, a sound-absorbing structure is provided at least in the middle of the inner wall of the water tank body. During the cleaning process of the cleaning machine, a large amount of water sprayed from the spray arm will be sprayed onto the inner wall of the middle part of the water tank body, causing a large noise and vibration. The above-mentioned sound-absorbing structure can effectively reduce the noise generated by the water flow impacting the inner wall of the water tank body and reduce the vibration.

[0023] Preferably, the muffler structure is a tapered opening opened at the intersection of the corresponding first reinforcing rib grids, and the diameter of the tapered opening gradually decreases from the inner wall surface of the water tank body outwards.

[0024] Preferably, a cross-shaped reinforcement piece is arranged in the conical opening corresponding to the intersection of the first reinforcement rib grid, the inner end of the cross-shaped reinforcement piece is hidden in the conical opening, and the outer end of the cross-shaped reinforcement piece is formed as a whole with the intersection of the first reinforcement rib grid. With such a structure, the connection strength between the silencing structure and the first reinforcement rib can be further strengthened, and the rigidity of the middle part of the water tank body can be further reduced on the basis of silencing.

[0025] Compared with the prior art, the advantages of the present invention are as follows: the present invention adopts plastic to manufacture the water tank body, which has strong plasticity, is convenient for deepening the depth of the water tank body as needed, and also greatly reduces the production cost; the present invention arranges a metal reinforcement on the inner wall surface of the upper part of the water tank body, when the hot water cleaning is completed, a large amount of steam will be retained on the top of the washing chamber, and the above-mentioned metal reinforcement can accelerate the condensation of steam, and at the same time, the metal reinforcement improves the strength of the upper part of the plastic water tank body to prevent the upper part of the water tank body from being deformed by heat, and in addition, it can resonate with the ultrasonic sound-generating device in the water tank cleaning machine to improve the ultrasonic cleaning effect; the present invention arranges a protrusion on the inner wall surface of the lower part of the water tank body, and the protrusion can prevent the water tank body from being deformed by heat or cold on the one hand, and at the same time, it can resonate with the ultrasonic sound-generating device at the bottom of the water tank cleaning machine to improve the ultrasonic cleaning effect; the present invention arranges a first reinforcement rib on the outer wall surface of the water tank body, and the first reinforcement rib can prevent the water tank body from being deformed by heat or cold on the one hand, and can play a sound insulation effect on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of the present invention (the second reinforcing rib is hidden);

[0027] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0028] Figure 3 for Figure 1 A cross-sectional view of the upper part;

[0029] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0030] Figure 5 is another structural schematic diagram of an embodiment of the present invention;

[0031] Figure 6 for Figure 5 A cross-sectional view of the middle part;

[0032] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part B. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 7 As shown, the washing machine of this embodiment is a water tank type washing machine, comprising a water tank body 1 having a washing cavity 10, the water tank body 1 needs to be installed on a cabinet countertop 100 for use, and the cabinet countertop 100 is provided with an installation opening 101 for installing the water tank body 1. The top of the water tank body 1 has an opening 11 connected to the washing cavity 10.

[0035] The bottom of the water tank body 1 of this embodiment is provided with a water pump 6 which can lift water from the bottom of the water tank body 1 and spray it upward through the spray arm 5. The bottom of the water tank body 1 is provided with an ultrasonic generator 4, which can effectively improve the cleaning effect.

[0036] The open portion 11 of the sink body 1 of this embodiment is made of metal at least at the position in contact with the cabinet countertop 100, and the sink body 1 portion below it is made of plastic. Considering that the plastic sink body 1 has a low load-bearing capacity, a metal assembly frame 2 for installation and load-bearing is provided at the periphery of the open portion 11 of the sink body 1. The edge of the open portion 11 extends outward to form a shelf 12 that can be placed on the cabinet countertop 100. The metal assembly frame 2 is arranged around the periphery of the open portion 11 of the sink body 1, and its cross section has at least a Z-shaped part, wherein the lower side 21 of the Z-shape is arranged under the shelf 12, the vertical side 20 of the Z-shape is arranged outside the periphery of the shelf 12, and the upper side 22 of the Z-shape gradually extends outward away from the shelf 12. The upper side 22 of the Z-shaped part of the metal assembly frame 2 has an outer vertical side 23 bent downward at the extended end, and the lower end of the outer vertical side 23 is flush with the lower side 21 of the Z-shaped part. This structure can effectively improve the safety and stability of installation.

[0037] In this embodiment, a metal reinforcement 3' arranged along the circumference of the water tank body 1 is provided on the inner wall surface of the upper part of the water tank body 1. In order to facilitate installation, a circumferentially arranged receiving groove 13 is opened on the inner wall surface of the upper part of the water tank body 1, and the metal reinforcement 3' is arranged in the receiving groove 13. After assembly, the inner wall of the metal reinforcement 3' is flush with the inner wall surface of the water tank body 1. This structure facilitates the positioning and installation of the metal reinforcement 3'. A second reinforcing rib 9 is provided on the outer peripheral wall of the water tank body 1 in the area corresponding to the receiving groove 13. The second reinforcing rib 9 has first reinforcing strips 91 arranged at intervals and extending up and down, and second reinforcing strips 92 connected to the lower end of each first reinforcing strip 91 along the circumferential direction. The provision of this structure can improve the rigidity of the upper part of the water tank body 1, and work together with the metal reinforcement 3' to prevent deformation of the top of the water tank body 1 due to high temperature.

[0038] Specifically, the metal reinforcement 3' is formed as an annular plate extending up and down in the receiving groove 13, the upper edge of the annular plate contacts the upper edge of the receiving groove 13, and the lower edge of the annular plate contacts the lower edge of the receiving groove 13. The upper edge of the annular plate is bent into the receiving groove 13 to form a first U-shaped structure 31' with an opening facing downward, the outer side of the first U-shaped structure 31' contacts the inner wall of the receiving groove 13, and the lower edge of the annular plate is bent into the receiving groove 13 to form a second U-shaped structure 32' with an opening facing upward, the outer side of the second U-shaped structure 32' contacts the inner wall of the receiving groove 13, and the annular plate and the first U-shaped structure 31' and the second U-shaped structure 32' on the annular plate together form a first cavity 30' with the inner wall of the receiving groove 13. A plurality of guide strips 33' extending up and down are convexly provided on the inner wall surface of the metal reinforcement 3'. The outer wall surface of the metal reinforcement 3' is inwardly concave at the guide strip 33' to form a concave area 34'. The convex inner and concave outer structure of the guide strip 33' greatly enhances the elasticity of the annular plate. When the ultrasonic cleaning device 4 of the cleaning machine is activated, it forms a strong resonance with the ultrasonic wave to improve the cleaning effect. Since the hot water is mainly sprayed onto the inner wall of the upper middle part of the water tank body 1 after being sprayed through the spray arm 5, and the hot steam rises to the top of the water tank body 1, the above-mentioned first cavity 30' can improve the thermal insulation performance of the lower part of the water tank body 1 and save energy consumption on the one hand, and on the other hand, it can also play a sound insulation effect to a certain extent.

[0039] In this embodiment, a first reinforcing rib 3 is provided in the middle of the outer peripheral wall of the water tank body 1. The first reinforcing rib 3 is formed into a grid shape and arranged along the circumference of the water tank body 1. During the washing process of the washing machine, hot water and cold water are often required to be washed alternately, and the deformation degree caused by cold water and hot water to the plastic tank body is different, and when hot water is used for washing, the hot steam rises and is located at the upper part of the water tank body 1, while when cold water is used for washing, the cold water is generally located at the bottom of the water tank body 1. Therefore, the upper part of the plastic water tank body 1 is easily deformed by high-temperature steam, and the lower part of the water tank body 1 is easily deformed by cold shrinkage, and the cold shrinkage deformation of the lower part of the water tank body 1 is greater than the thermal deformation of the upper part of the water tank body 1. The above structure can support the water tank body 1 and prevent the water tank body 1 from being deformed due to cold or heat; at the same time, when the ultrasonic sounding device 4 is activated at the bottom of the water tank body 1, since the ultrasonic wave needs to be transmitted through water as a medium, the dense grid-shaped first reinforcing ribs 3 at the bottom of the water tank body 1 are conducive to the transmission of the ultrasonic wave, thereby improving the cleaning effect. In this embodiment, a metal strip 31 is embedded in the first reinforcing rib 3 at the lower part of the water tank body 1, and the metal strip 31 is exposed on the inner wall surface of the water tank body 1. Since the cold shrinkage deformation of the lower part of the water tank body 1 has a greater impact on the water tank than the thermal deformation of the upper part of the water tank body 1, the above structure is adopted to embed the metal strip 31 in the first reinforcing rib 3 at the lower part of the water tank body 1, which can improve the support force of the lower part of the water tank body 1 and prevent the lower part of the water tank body 1 from internal deformation due to cold shrinkage; at the same time, when the ultrasonic sounding device 4 is activated in the water tank cleaning machine, the above metal strip 31 can resonate with the ultrasonic sounding device 4 to further enhance the ultrasonic cleaning effect.

[0040] A silencer structure 7 is provided in the middle of the inner wall of the water tank body 1 of this embodiment. The silencer structure 7 is a conical opening opened at the intersection of the grid corresponding to the first reinforcement rib 3, and the diameter of the conical opening gradually decreases from the inner wall surface of the water tank body 1 to the outside. During the cleaning process of the cleaning machine, a large amount of water sprayed by the spray arm 5 will be sprayed onto the inner wall of the middle part of the water tank body 1, causing a large noise and vibration. The above-mentioned silencer structure can effectively reduce the noise generated by the water flow impacting the inner wall of the water tank body 1 and reduce the vibration. A cross-shaped reinforcement member 71 arranged at the intersection of the grid corresponding to the first reinforcement rib 3 is also provided in the conical opening. The inner end of the cross-shaped reinforcement member 71 is hidden in the conical opening and is roughly located in the middle of the conical opening. The outer end of the cross-shaped reinforcement member 71 is formed as a whole with the corresponding intersection of the grid of the first reinforcement rib 3. With such a structure, the connection strength between the silencer structure 7 and the first reinforcement rib 3 and the rigidity of the middle part of the water tank body 1 can be further strengthened, and the vibration can be further reduced on the basis of silence.

[0041] In this embodiment, a plurality of spaced protrusions 8 are provided on the inner wall surface of the lower part of the water tank body 1. The protrusions 8 are integrally formed with the water tank body 1. With this structure, when the ultrasonic cleaning device 4 is activated at the bottom of the cleaning machine, the protrusions 8 can resonate well with the ultrasonic wave upward, thereby improving the ultrasonic cleaning effect.

[0042] In this embodiment, the sink body 1 is made of plastic, which has strong plasticity and is convenient for deepening the depth of the sink body as needed, which improves the conditions for further developing new functions and structures of the sink-type cleaning machine. Of course, the plastic sink body also greatly reduces the production cost compared with the stainless steel sink body. In this embodiment, the sink body 1 is installed on the cabinet countertop by using a metal assembly frame 2, which solves the problem of the small bearing capacity of the shelf 12 of the plastic sink body 1 and improves the stability of the installation of the sink body 1. In addition, in this embodiment, a metal reinforcement 3' is arranged on the inner wall surface of the upper part of the sink body 1. The metal reinforcement 3' can be The water tank body 1 is prevented from being deformed by heat, and at the same time, it can resonate with the ultrasonic sound-generating device 4 in the water tank cleaning machine to improve the ultrasonic cleaning effect; in this embodiment, a protrusion 8 is arranged on the inner wall surface of the lower part of the water tank body 1. On the one hand, the protrusion 8 can prevent the water tank body 1 from being deformed by heat or cold, and at the same time, it can resonate with the ultrasonic sound-generating device 4 at the bottom of the water tank cleaning machine to improve the ultrasonic cleaning effect; in this embodiment, a first reinforcing rib 3 is arranged on the outer wall surface of the water tank body 1. On the one hand, the first reinforcing rib 3 can prevent the water tank body 1 from being deformed by heat or cold, and on the other hand, it can have a sound insulation effect.

Claims

1. A cleaning machine, comprising a water tank body (1) having a washing chamber (10), characterized in that: The water tank body (1) is made of plastic material and further comprises a metal reinforcement member (3'), wherein the metal reinforcement member (3') is arranged on the inner wall surface of the upper part of the water tank body (1), a first reinforcement rib (3) is arranged at least in the middle part of the outer peripheral wall of the water tank body (1), and a plurality of protrusions (8) arranged at intervals are arranged at least in the lower part of the inner wall surface of the water tank body (1); The inner wall surface of the metal reinforcement (3') is provided with a guide strip (33') extending up and down; the inner wall surface of the upper part of the water tank body (1) is provided with a circumferentially arranged receiving groove (13), and the metal reinforcement (3') is arranged in the receiving groove (13); the metal reinforcement (3') is formed as an annular plate extending up and down in the receiving groove (13), the upper edge of the annular plate is in contact with the upper edge of the receiving groove (13), and the lower edge of the annular plate is in contact with the lower edge of the receiving groove (13); the upper edge of the annular plate is in contact with the receiving groove (13) The annular plate is bent in the middle to form a first U-shaped structure (31') with an opening facing downward, and the outer side of the first U-shaped structure (31') contacts the inner wall of the accommodating groove (13); the lower edge of the annular plate is bent into the accommodating groove (13) to form a second U-shaped structure (32') with an opening facing upward, and the outer side of the second U-shaped structure (32') contacts the inner wall of the accommodating groove (13); the annular plate and the first U-shaped structure (31'), the second U-shaped structure (32') on the annular plate together form a first cavity (30') with the inner wall of the accommodating groove (13); A second reinforcing rib (9) is provided on the outer peripheral wall of the water tank body (1) in an area corresponding to the accommodating groove (13).

2. The cleaning machine according to claim 1, characterized in that: The outer wall surface of the annular plate is inwardly recessed at a location corresponding to the guide strip (33') to form a recessed area (34').

3. The cleaning machine according to claim 1, characterized in that: The first reinforcing ribs (3) are formed into a grid shape and are arranged along the circumference of the water tank body (1); a metal strip (31) is embedded in the first reinforcing ribs (3) near the lower part of the water tank body (1), and the metal strip (31) is exposed on the inner wall surface of the water tank body (1).

4. The cleaning machine according to claim 3, characterized in that: A silencer structure (7) is provided at least in the middle of the inner wall surface of the water tank body (1); the silencer structure (7) is a conical opening opened at the intersection of the grid corresponding to the first reinforcing rib (3); the diameter of the conical opening gradually decreases from the inner wall surface of the water tank body (1) outwards.

5. The cleaning machine according to claim 4, characterized in that: The conical opening is also provided with a cross-shaped reinforcement member (71) arranged at the intersection of the grid corresponding to the first reinforcement rib (3), the inner end of the cross-shaped reinforcement member (71) is hidden in the conical opening, and the outer end of the cross-shaped reinforcement member (71) is formed as a whole with the intersection of the grid corresponding to the first reinforcement rib (3).

6. The cleaning machine according to any one of claims 1 to 5, characterized in that: The top of the water tank body (1) has an opening (11) connected to the washing chamber (10); the opening (11) of the water tank body (1) is made of metal at least at a position in contact with the installation plane, and the water tank body (1) portion below the opening is made of plastic.

7. The cleaning machine according to claim 6, characterized in that: A metal assembly frame (2) for installation and load bearing is arranged around the opening (11) of the water tank body (1).

8. The cleaning machine according to claim 7, characterized in that: The edge of the opening (11) extends outward to form a shelf (12) that can be placed on a mounting plane. The metal assembly frame (2) is arranged around the periphery of the opening (11) of the sink body (1), and its cross section has at least a partial Z-shape, wherein the lower side (21) of the Z-shape is arranged below the shelf (12), the vertical side (20) of the Z-shape is arranged outside the periphery of the shelf (12), and the upper side (22) of the Z-shape gradually extends outward away from the shelf (12).

9. The cleaning machine according to claim 8, characterized in that: The upper edge (22) of the Z-shaped portion of the metal assembly frame (2) has a downwardly bent outer vertical edge (23) at the extended end, and the lowermost end of the outer vertical edge (23) is flush with the lower edge (21) of the Z-shaped portion.

10. The cleaning machine according to any one of claims 1 to 5, characterized in that: An ultrasonic generating device (4) is provided at the bottom of the water tank body (1).

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