A cleaning machine

Abstract

The present invention relates to a washing machine, comprising a water tank body, an impeller and a spray arm, wherein the water tank body has a washing chamber, the bottom wall of the washing chamber is partially recessed downward to form a water return area for collecting water, the spray arm comprises a spray arm body having a water collection chamber, the spray arm body is in a vertically extending cylindrical shape and has a water inlet connected to the water return area at the bottom, and a plurality of nozzles connected to the water collection chamber are arranged at intervals on the outer peripheral wall of the spray arm body; the impeller is rotatably arranged in the water return area and the main body of the impeller is located in the water collection chamber, and the lower end of the impeller is exposed to the water inlet at the lower end of the spray arm body. Since the water flow conveying stroke between the impeller and the nozzle is greatly shortened, the spraying power of the water flow is improved. At the same time, the arrangement of the nozzle completely changes the spraying direction of the water outlet, so that the water flow can not only spray to all sides but also spray to a certain height, and the water spraying covers a large range, avoiding the problem of incomplete rinsing of some tableware, and improving the cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, in particular to a washing machine capable of washing dishes, fruits and vegetables and the like. 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] At present, the above-mentioned cleaning machine mainly uses the water pump and spray arm structure disclosed in the Chinese invention patent "An open water pump and its application" (application number: CN201410848627.2) with authorization announcement number CN104564838B. The structure is a top spray structure. Its advantage is that the rising water flow will fall back, producing a double washing effect, but the spray arm of this structure has relatively high requirements for the placement of tableware. At the same time, if the tableware blocks the rising water flow, the upper tableware is prone to incomplete cleaning. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cleaning machine which can pump water in a washing chamber into a spray arm and spray water around so as to expand the spray range, increase the water jet intensity and thus improve the cleaning effect.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a cleaning machine, including a water tank body, an impeller and a spray arm, the water tank body is hollow inside to form a washing chamber, the bottom wall of the washing chamber is partially recessed downward to form a return water area for collecting water, the spray arm is rotatably arranged in the return water area, the impeller is used to pump water in the return water area into the spray arm, and is characterized in that: the spray arm includes a spray arm body with a water collecting chamber, the spray arm body is a vertically extending cylindrical shape and has a water inlet connected to the return water area at the bottom, and a plurality of nozzles connected to the water collecting chamber are arranged at intervals on the outer peripheral wall of the spray arm body; the impeller is rotatably arranged in the return water area and the main body of the impeller is located in the water collecting chamber, and the lower end of the impeller is exposed from the water inlet at the lower end of the spray arm body.

[0007] Preferably, the nozzles are arranged in rows in the circumferential direction of the spray arm body, each row has at least two nozzles arranged vertically at intervals, and two adjacent rows of nozzles are arranged alternately. Such a structure is adopted to expand the spray range and spray uniformity.

[0008] Further preferably, in at least one row of the nozzles, the nozzles located at the upper part of the spray arm body gradually tilt upward from the water inlet end to the water outlet end, and the nozzles located at the lower part of the spray arm body gradually tilt downward from the water inlet end to the water outlet end. Such a structure is adopted to further expand the spray range and spray uniformity.

[0009] Preferably, the nozzle gradually tilts outward from the water inlet end to the water outlet end. With such a structure, when the spray arm body rotates, the rotation direction is opposite to the tilting direction of the nozzle, so as to reduce the water outlet resistance, and provide inertia for the water outlet through the flow channel of the nozzle to maintain a high water outlet speed, thereby improving the cleaning effect.

[0010] In order to facilitate assembly, the cleaning machine also includes a guide seat and an assembly ring. The guide seat is through-through and the lower end is supported on the inner bottom wall of the return water area. The lower end of the spray arm body is rotatably arranged on the assembly ring. The assembly ring is constrained on the upper end surface of the guide seat. The side wall of the guide seat is provided with a return water port for water supply from the return water area into the guide seat. With such a structure, the water in the return water area passes through the guide seat and enters the spray arm body through the rotation of the impeller and is sprayed out as the spray arm rotates.

[0011] Preferably, the upper end surface of the assembly ring is rotatably connected to the lower end surface of the spray arm body through a swivel pair, and the lower end of the spray arm body extends downward near the inner wall to form a sealing ring that can be attached to the inner wall surface of the assembly ring. The above structure facilitates the installation of the spray arm body and prevents water from leaking at the connection between the spray arm body and the assembly ring to affect the spray intensity of the water flow, thereby improving the cleaning effect.

[0012] Preferably, the upper end surface of the spray arm body is formed into a conical surface that gradually slopes downward from the outside to the inside in the radial direction. This structure can prevent the water drawn by the impeller from forming a vortex here and causing cavitation, thereby increasing the water outlet speed and thus improving the cleaning effect.

[0013] Further preferably, a guide groove extending inward from the water inlet port of the nozzle is formed on the inner wall surface of the spray arm body, and a guide cover capable of semi-enclosing the guide groove is provided near the nozzle. During the rotation of the spray arm body, the water in the water collection cavity is blocked by the guide cover and is conducive to quickly rushing into the guide groove and into the nozzle. This structure is conducive to increasing the water outlet speed and further improving the cleaning effect.

[0014] Preferably, the nozzle is provided with a guide channel with an inner diameter gradually decreasing along the water flow direction at least near the water inlet port. This structure facilitates water inlet.

[0015] In each of the above schemes, the impeller includes a shaft located in the center and a plurality of blades uniformly distributed in the circumferential direction and extending in the axial direction on the outer peripheral wall of the shaft, wherein the blade has a first part located in the upper part and capable of dispersing the fluid in the radial direction and a second part located in the lower part and capable of drawing the fluid in the axial direction. The second part of the blade is provided with at least two third parts which are arranged at intervals along the axial direction of the impeller and capable of dispersing the fluid in the radial direction. The lower edge of the third part is connected to the upper surface of the second part, and the upper edge of the third part extends radially outward from the outer peripheral wall of the shaft. The impeller has a large length in the vertical direction, and the structural arrangement of the third part can greatly increase the pump water power and reduce the problem of insufficient jet power caused by the loss of part of the mechanical energy in the process of upward transportation of water flow.

[0016] Preferably, the third part is arranged near the water inlet of the spray arm body and located above the water inlet. The third part is arranged here to directly act on the fluid in the spray arm body, which can better improve the water jet speed.

[0017] In the above schemes, the lower end of the impeller is connected to a driving member capable of driving the impeller to rotate. The driving member is a motor arranged outside the bottom of the water tank body, and the output shaft of the motor passes through the bottom wall of the water tank body and is connected to the lower end of the impeller shaft.

[0018] Compared with the prior art, the advantages of the present invention are: the present invention is provided with a vertically extending cylindrical spray arm body and an impeller rotatably arranged in the spray arm body and cooperated with the spray arm body to draw water; the spray arm body is provided with a water inlet at the bottom and a plurality of nozzles connected with the water collecting chamber are arranged at intervals on the outer peripheral wall; since the water flow conveying stroke between the impeller and the nozzle is greatly shortened, the spraying power of the water flow is improved; at the same time, the arrangement of the nozzle completely changes the spraying direction of the water outlet, so that the water flow can not only spray in all directions but also spray to a certain height; the water spraying covers a large range, thereby avoiding the problem of incomplete rinsing of some tableware and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a cleaning machine in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A cross-sectional view of

[0021] Figure 3 This is a schematic diagram of the structure of the spray arm in an embodiment of the present invention;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure from another angle;

[0023] Figure 5 for Figure 3 A cross-sectional view of

[0024] Figure 6 Schematic diagram of the structure of the coordination state of the spray arm and the impeller in an embodiment of the present invention;

[0025] Figure 7 for Figure 6 Schematic diagram of the structure of the impeller. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 7As shown, the cleaning machine of this embodiment includes a water tank body 5, an impeller 4 and a spray arm. The water tank body 5 is hollow inside to form a washing chamber 51. The bottom wall of the washing chamber 51 is partially recessed downward to form a water return area 52 for collecting water. The spray arm is rotatably arranged in the water return area 52. The impeller 4 is used to pump water from the water return area 52 into the spray arm. The spray arm includes a spray arm body 1 and an assembly ring 2. The spray arm body 1 has a water collection chamber 10. The spray arm body 1 is a vertically extending cylindrical shape and has a water inlet 11 connected to the water return area 52 at the bottom. A plurality of nozzles 12 connected to the water collection chamber 10 are arranged at intervals on the outer peripheral wall of the spray arm body 1. The impeller 4 is rotatably arranged in the water return area 52 and the main body of the impeller 4 is located in the water collection chamber 10. The lower end of the impeller 4 is exposed from the water inlet 11 at the lower end of the spray arm body 1.

[0028] In this embodiment, the nozzles 12 are arranged in vertical rows on the circumference of the spray arm body 1, and each row has at least two nozzles 12 arranged vertically at intervals, and the nozzles 12 in two adjacent rows are arranged in a staggered manner. In this embodiment, there are two nozzles 12 in one vertical row, and there are three nozzles 12 in the vertical row adjacent to the vertical row. In the vertical row with three nozzles 12, the nozzles 12 located at the upper part of the spray arm body 1 gradually tilt upward from the water inlet end to the water outlet end, the axis of the nozzles 12 located in the middle part of the spray arm body 1 is arranged perpendicular to the axis of the spray arm body 1, and the nozzles 12 located at the lower part of the spray arm body 1 gradually tilt downward from the water inlet end to the water outlet end. Such a structure is adopted to expand the spray range and spray uniformity. The nozzle 12 gradually tilts outward along the radial direction of the spray arm body 1 from the water inlet end to the water outlet end. When the spray arm body 1 rotates, the rotation direction is opposite to the tilting direction of the nozzle 12 to reduce the water outlet resistance, and provide inertia for the water outlet through the flow channel of the nozzle 12 to maintain a higher water outlet speed, thereby improving the cleaning effect.

[0029] The upper end surface of the spray arm body 1 of this embodiment is formed into a tapered surface 13 which gradually slopes downward from the outside to the inside in the radial direction. This structure can prevent the water drawn by the impeller from rotating in the water collecting chamber 10 from forming a vortex and generating cavitation, thereby increasing the water outlet speed and thus improving the cleaning effect.

[0030] In this embodiment, a guide groove 14 extending inward from the water inlet port of the nozzle 12 is formed on the inner wall surface of the spray arm body 1, and a guide cover 15 that can half-surround the guide groove 14 is provided near the nozzle 12. During the rotation of the spray arm body 1, the water in the water collection chamber 10 is blocked by the guide cover 15 and is easy to quickly rush into the guide groove 14 and enter the nozzle 12. This structure is conducive to increasing the water outlet speed and further improving the cleaning effect. The nozzle 12 is at least formed with a guide channel 121 with an inner diameter gradually decreasing along the water flow direction near the water inlet port, and this structure facilitates water inlet.

[0031] In this embodiment, the cleaning machine further comprises a guide seat 6, which is through from top to bottom and supported at the lower end on the inner bottom wall of the return water area 52. The lower end of the spray arm body 1 is rotatably arranged on the assembly ring 2, and the assembly ring 2 is constrained on the upper end surface of the guide seat 6. The specific constraint method can be screw fixing, etc., as long as the assembly ring 2 can be prevented from being separated from the guide seat 6 and no circumferential displacement occurs between the assembly ring 2 and the upper end surface of the guide seat 6. A return water port 61 is provided on the side wall of the guide seat 6 for supplying water from the return water area 52 into the guide seat 6. The lower end of the impeller 4 is located in the guide seat 6, and the lower end surface of the impeller 4 is arranged corresponding to the middle part of the return water port 61. This structure is conducive to rapid water drawing. The assembly ring 2 is provided to facilitate the rotatable connection of the spray arm body 1 to the guide seat 6 of the cleaning machine, so as to facilitate disassembly and installation. The upper end surface of the assembly ring 2 of this embodiment is rotatably connected to the lower end surface of the spray arm body 1 through a rotating pair 3. The revolving pair can be a rolling bearing type revolving pair, which is beneficial to reduce friction, improve water energy utilization, and thus improve the cleaning effect. The lower end of the spray arm body 1 extends downward near the inner wall surface to form a sealing ring 16 that can be attached to the inner wall surface of the assembly ring 2 to prevent water from leaking at the connection between the spray arm body 1 and the assembly ring 2 to affect the spray intensity of the water flow, thereby improving the cleaning effect.

[0032] The impeller 4 includes a shaft 41 located at the center and a plurality of blades 42 uniformly distributed in the circumferential direction and extending in the axial direction on the outer peripheral wall of the shaft 41. The blade 42 includes a first portion 421 located at the upper part and capable of dispersing the fluid in the radial direction and a second portion 422 located at the lower part and capable of drawing the fluid in the axial direction. The blade 42 also includes four third portions 423 arranged at intervals in the circumferential direction of the shaft 41 and capable of dispersing the fluid in the radial direction. The third portion 423 is arranged on the second portion 422, the lower edge of the third portion 423 is connected to the upper surface of the second portion 422, and the upper edge of the third portion 423 extends radially outward from the outer peripheral wall of the shaft 41. The third portion 423 is arranged near the water inlet 11 of the spray arm body 1 and is located above the water inlet 11. The lower end of the impeller 4 is connected to a driving member 7 capable of driving the impeller 4 to rotate. The driving member 7 is a motor arranged outside the bottom of the water tank body 1, and the output shaft of the motor passes through the bottom wall of the water tank body 5 and is connected to the lower end of the impeller shaft 41. The impeller 4 is relatively long in the vertical direction. The structural setting of the third part 423 can greatly increase the pump water power and reduce the problem of insufficient spray power caused by the loss of part of the mechanical energy in the process of upward water flow. The setting position of the third part 423 directly applies power to the fluid in the spray arm body 1, which can better play a role in increasing the water flow spray speed.

[0033] The present embodiment is provided with a vertically extending cylindrical spray arm body 1 and an impeller 4 rotatably arranged in the spray arm body 1 and cooperating with the spray arm body 1 to draw water. The spray arm body 1 is provided with a water inlet 11 at the bottom and a plurality of nozzles 12 connected with the water collecting chamber are arranged at intervals on the outer peripheral wall. Since the water flow conveying stroke between the impeller 4 and the nozzle 12 is greatly shortened, the spraying power of the water flow is improved. At the same time, the arrangement of the nozzle 12 completely changes the spraying direction of the water, so that the water flow can not only spray in all directions but also spray to a certain height. The water spraying covers a large area, avoiding the problem of incomplete rinsing of some dishes and improving the cleaning effect.

Claims

1. A cleaning machine, comprising a water tank body (5), an impeller (4) and a spray arm, wherein the water tank body (5) is hollow inside to form a washing chamber (51), the bottom wall of the washing chamber (51) is partially recessed downward to form a water return area (52) for collecting water, the spray arm is rotatably arranged in the water return area (52), the impeller (4) is used to pump water in the water return area (52) into the spray arm, and is characterized in that: The spray arm comprises a spray arm body (1) having a water collecting chamber (10); the spray arm body (1) is in the shape of a vertically extending cylinder and has a water inlet (11) at the bottom thereof connected to a water return area (52); a plurality of nozzles (12) connected to the water collecting chamber (10) are arranged at intervals on the outer peripheral wall of the spray arm body (1); the impeller (4) is rotatably arranged in the water return area (52) and the main body of the impeller (4) is located in the water collecting chamber (10); the lower end of the impeller (4) is exposed from the water inlet (11) at the lower end of the spray arm body (1); The nozzles (12) are arranged in rows in the circumferential direction of the spray arm body (1), each row having at least two nozzles (12) arranged vertically with an interval between them, and two adjacent rows of nozzles (12) are arranged in a staggered manner; In at least one row of the nozzles (12), the nozzles (12) located at the upper part of the spray arm body (1) gradually tilt upward from the water inlet end to the water outlet end, and the nozzles (12) located at the lower part of the spray arm body (1) gradually tilt downward from the water inlet end to the water outlet end; The nozzle (12) gradually tilts outwards from the water inlet end to the water outlet end.

2. The cleaning machine according to claim 1, characterized in that: It also includes a guide seat (6) and an assembly ring (2), wherein the guide seat (6) is connected from top to bottom and the lower end is supported on the inner bottom wall of the return water area (52), the lower end of the spray arm body (1) is rotatably arranged on the assembly ring (2), the assembly ring (2) is constrained on the upper end surface of the guide seat (6), and the side wall of the guide seat (6) is provided with a return water port (61) for supplying water from the return water area (52) into the guide seat (6).

3. The cleaning machine according to claim 2, characterized in that: The upper end surface of the assembly ring (2) is rotatably connected to the lower end surface of the spray arm body (1) via a rotating pair (3), and the lower end of the spray arm body (1) extends downward near the inner wall surface to form a sealing ring (16) that can be attached to the inner wall surface of the assembly ring (2).

4. The cleaning machine according to any one of claims 1 to 3, characterized in that: The upper end surface of the spray arm body (1) is formed as a conical surface (13) which gradually slopes downward from the outside to the inside in the radial direction.

5. The cleaning machine according to any one of claims 1 to 3, characterized in that: A guide groove (14) is formed on the inner wall surface of the spray arm body (1) and extends inwardly from the water inlet port of the nozzle (12). The guide groove (14) is provided with a guide cover (15) that can semi-enclose the guide groove (14) near the nozzle (12).

6. The cleaning machine according to any one of claims 1 to 3, characterized in that: The nozzle (12) is provided with a flow guide channel (121) whose inner diameter gradually decreases along the water flow direction, at least near the water inlet port.

7. The cleaning machine according to any one of claims 1 to 3, characterized in that: The impeller (4) comprises a shaft (41) located at the center and a plurality of blades (42) uniformly distributed in the circumferential direction and extending in the axial direction on the outer peripheral wall of the shaft (41), wherein the blades (42) have a first portion (421) located at the upper portion and capable of dispersing the fluid in the radial direction, and a second portion (422) located at the lower portion and capable of drawing the fluid upward from the shaft (41).

8. The cleaning machine according to claim 7, characterized in that: The second part (422) of the blade (42) is provided with at least two third parts (423) which are spaced apart along the axial direction of the impeller (4) and can disperse the fluid in the radial direction.

9. The cleaning machine according to claim 8, characterized in that: The lower edge of the third portion (423) is connected to the upper surface of the second portion (422), and the upper edge of the third portion (423) extends radially outward from the outer peripheral wall of the shaft (41).

10. The cleaning machine according to claim 9, characterized in that: The third portion (423) is arranged close to the water inlet (11) of the spray arm body (1) and is located above the water inlet (11).

11. The cleaning machine according to any one of claims 1 to 3, characterized in that: The lower end of the impeller (4) is connected to a driving member (7) capable of driving the impeller (4) to rotate.

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