A cleaning machine

Abstract

The present invention relates to a cleaning machine, comprising a water tank body, a spray arm, a motor, a motor shaft, a centrifugal impeller, a water supply mechanism, and a guide member. The centrifugal impeller is arranged in the spray arm and connected to the upper end of the motor shaft. The motor shaft is connected from top to bottom and the lower end is connected to the water supply mechanism. The guide member is arranged below the spray arm and connected to the water inlet. A plurality of guide holes are arranged at intervals on the outer peripheral wall of the lower part of the guide member. The upper part of the guide member is provided with a valve plate assembly that can close the lower end of the water inlet when the motor shaft inputs water to the spray arm and open the lower end of the water inlet when the centrifugal impeller is started. When in use, the water inlet is first closed by the valve plate assembly, a small amount of water is input into the spray arm by the motor shaft to immerse the centrifugal impeller, and the water supply to the motor shaft is stopped after the centrifugal impeller is started. The water flow continuously enters the guide member under the action of negative pressure and drives the valve plate assembly to open the water inlet, thereby realizing the continuous supply of water flow. The two-way rotation of the spray arm can be realized by the forward and reverse rotation of the motor, thereby improving the cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning machines, in particular to a cleaning machine with a spray arm capable of bidirectional rotation. Background Art

[0002] As people's living standards continue to improve, dishwashers, as a kitchen appliance, are increasingly entering households. Currently, dishwashers on the market are generally divided into three types: desktop, cabinet, and tank. Among them, desktop 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] For example, the structure disclosed in the Chinese patent "Sink-type cleaning machine" (application number: CN2013749864.9) with authorization announcement number CN3735237B, the sink-type cleaning machine includes a box body forming a washing space, the box body includes a sink body, the sink body is concave at least in the central part, the concave part is covered with a drain plate of the same shape as the concave part, the drain plate is provided with a plurality of drain holes for draining water, the space between the concave part and the drain plate forms a drain area, the drain plate is flush with other parts of the bottom of the sink body, and a water pump is provided in the drain area to pump water out of the drain area to the top of the drain plate. At present, the above-mentioned cleaning machine mainly uses the impact force of water flow to clean food residues on tableware. Generally, tableware is placed vertically in the bowl rack, and the spray arm rotates in one direction so that the water flow moves roughly tangentially along the surface of the dishes, thereby removing food residues. When the water flow comes into contact with the dishes, the impact force will be greatly attenuated. When the spray arm can only rotate in one direction, it is easy for one side of the dishes to be cleaned cleanly while the other side is not. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a cleaning machine capable of making the spray arm rotate in both directions so as to improve the cleaning effect in view of the current status of the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a washing machine, including a water tank body, a spray arm, a motor and a motor shaft, the water tank body is hollow inside to form a washing space, the spray arm has a water inlet and a water outlet and is rotatably arranged in the washing space, the motor is arranged outside the water tank body, the motor shaft is connected to the motor and extends into the spray arm, and is characterized in that: it also includes

[0006] A centrifugal impeller is disposed in the spray arm and connected to the upper end of the motor shaft, and is used to disperse the water entering the water inlet to the water outlet for spraying;

[0007] A water supply mechanism, wherein the motor shaft passes through from top to bottom and the lower end is connected to the water supply mechanism; and

[0008] The guide member is arranged below the spray arm and connected to the water inlet. A plurality of guide holes are arranged at intervals on the outer peripheral wall of the lower part of the guide member. The upper part of the guide member is provided with a valve plate assembly which can close the lower end of the water inlet when the motor axial direction inputs water to the spray arm and open the lower end of the water inlet when the centrifugal impeller is started.

[0009] Preferably, a water collecting chamber is formed in the middle of the spray arm, and diversion channels are formed on both sides of the water collecting chamber along the length direction of the spray arm, the water inlet is opened on the lower wall of the spray arm and is connected to the water collecting chamber, and the water outlet holes are multiple and symmetrically arranged above the diversion channels on both sides of the water collecting chamber. The water outlet holes are symmetrically arranged on the spray arm to balance the recoil force of the water flow when the spray arm rotates forward and reversely, and also to ensure that the washing effect on the dishes is consistent when rotating forward and reversely.

[0010] In the present invention, the centrifugal impeller is rotatably arranged in the water collecting chamber, and the upper port of the motor shaft passes through the centrifugal impeller and is exposed in the water collecting chamber. After the upper port of the motor shaft discharges water, the centrifugal impeller can be covered to drive the centrifugal impeller to work.

[0011] To facilitate assembly, the bottom of the guide is connected to the bottom wall of the water tank body and has a first assembly hole for the motor shaft to pass through. A bearing sealing assembly is arranged in the first assembly hole to enable the motor shaft to rotate relative to the guide.

[0012] In the above schemes, the valve plate assembly includes

[0013] A baffle plate is radially arranged at the middle of the flow guide and has a second assembly hole for the motor shaft to pass through in the middle;

[0014] A first valve plate is rotatably disposed on the first side of the baffle plate and can seal between the first side of the baffle plate and the corresponding inner wall of the guide member;

[0015] A second valve plate is rotatably disposed on the second side of the baffle plate and is capable of sealing between the second side of the baffle plate and the corresponding inner wall of the guide member; and

[0016] The retaining ring is arranged on the inner wall of the flow guide member along the circumferential direction and can be supported on the bottom edges of the first valve plate and the second valve plate.

[0017] When the cleaning machine is turned on, the first valve plate and the second valve plate fall onto the retaining ring by their own gravity to close the water inlet of the spray arm. At this time, a small amount of water is input into the spray arm through the hollow motor shaft to immerse the centrifugal impeller. In this way, the centrifugal impeller can continuously output water to the water outlet for spraying when it rotates. While the centrifugal impeller disperses the water flow, negative pressure is generated in the water collecting chamber to suck the water in the water tank body upward from the guide hole of the guide member. The inhaled water flow lifts the first valve plate and the second valve plate upward, thereby opening the water inlet and realizing the reciprocating use of water flow for washing. After the centrifugal impeller pumps water normally, the motor shaft can stop supplying water to the water collecting chamber.

[0018] To facilitate assembly, both sides of the baffle are respectively recessed inward to form installation notches. Correspondingly, the side walls of the first valve plate and the second valve plate are convexly provided with assembly blocks that can be rotatably inserted into the corresponding installation notches. The baffle is provided with a connecting shaft that can pass through the corresponding installation notches and the assembly block to rotatably connect the first valve plate and the second valve plate to the baffle.

[0019] As an improvement, the cleaning machine also includes a deceleration structure that can reduce the rotation speed of the spray arm by cutting the water flow. According to the flow direction of the water flow, the deceleration structure is arranged upstream of the water inlet of the spray arm. Since the present invention cancels the axial flow structure of the impeller and adopts a simple centrifugal impeller, the centrifugal impeller has a relatively high rotation speed. If the rotation speed of the spray arm is too large, it is not conducive to the bidirectional rotation of the spray arm. The present invention is provided with the above-mentioned deceleration structure, which can effectively balance the rotation speed of the spray arm, and is conducive to the reversing rotation of the spray arm while maintaining an efficient washing effect.

[0020] Preferably, the edge of the water inlet of the spray arm extends outwardly in the circumferential direction to form a first U-shaped groove arranged around the water inlet, and a through hole for water flow to enter the first U-shaped groove is opened on the inner wall of the water inlet. A plurality of blades that can cut the water flow when the spray arm is rotating to reduce the rotation speed of the spray arm are arranged at intervals on the inner wall of the first U-shaped groove away from the water inlet, and the blades and the first U-shaped groove together constitute the deceleration structure. The deceleration structure only needs a small amount of water, and the spray arm deceleration effect can be achieved by cutting the water flow with the blades, and the structure is simple and practical.

[0021] For the convenience of connection, the spray arm is rotatably arranged on the guide member through a buckle, the upper end of the buckle is rotatably connected to the deceleration structure, and the lower end of the buckle is limitatively connected to the upper end of the guide member.

[0022] Preferably, the upper part of the buckle is formed with a second U-shaped groove that can be rotatably buckled in the first U-shaped groove, the inner wall of the lower part of the buckle has an internal thread, and correspondingly, the outer peripheral wall of the upper end of the guide member has an external thread matching the internal thread.

[0023] Compared with the prior art, the advantages of the present invention are: the present invention cancels the structure of the axial flow combined with the centrifugal impeller used in the existing water tank type cleaning machine, and adopts an independent centrifugal impeller structure. At the same time, in order to enable the centrifugal impeller to smoothly pump water into the spray arm, the present invention sets the motor shaft to a hollow structure. When in use, the water inlet is first closed through the valve plate assembly, and a small amount of water is input into the spray arm by the motor shaft to immerse the centrifugal impeller. After the centrifugal impeller is started, the water supply of the motor shaft is stopped. Under the action of negative pressure, the water flow continuously enters the guide member and drives the valve plate assembly to open the water inlet, thereby realizing the continuous supply of water flow. Since the present invention realizes the water flow from bottom to top and can be separated from the axial flow impeller, the bidirectional rotation of the spray arm can be realized by the forward and reverse rotation of the motor, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the connection structure between the motor, the flow guide member and the spray arm in an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Cross-sectional view (including motor shaft);

[0027] Figure 4 Schematic diagram of the structure of the flow guide member in the embodiment of the present invention;

[0028] Figure 5 for Figure 4 A cross-sectional view of (hiding the first valve plate);

[0029] Figure 6 is a cross-sectional view of a spray arm according to an embodiment of the present invention;

[0030] Figure 7 for Figure 6 A schematic diagram of the enlarged structure of part A;

[0031] Figure 8 Schematic diagram of the structure of the buckle in the embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 8As shown, the cleaning machine of this embodiment includes a water tank body 1, a spray arm 2, a motor 3, a motor shaft 31, a centrifugal impeller 4, a water supply mechanism 5 and a guide member 6. The water tank body 1 is hollow inside to form a washing space, and the spray arm 2 is rotatably arranged at the bottom of the washing space. A water collecting chamber 20 is formed in the middle of the spray arm 2, and the two sides of the water collecting chamber 20 extend to both sides along the length direction of the spray arm 2 to form a guide channel 21. A water inlet 22 connected to the water collecting chamber 20 is opened on the lower wall surface of the middle part of the spray arm 2, and a plurality of water outlet holes 23 arranged at intervals and connected to the guide channel 21 are opened on the upper wall surface of the spray arm 2 corresponding to the guide channel 21, and the water outlet holes 23 above the guide channel 21 on both sides of the water collecting chamber 20 are symmetrically arranged.

[0034] In this embodiment, the motor 3 is arranged below the water tank body 1, the motor shaft 31 is connected to the motor 3, and the upper end of the motor shaft 31 extends into the water collecting chamber 20 of the spray arm 2. The centrifugal impeller 4 is arranged in the water collecting chamber 20 of the spray arm 2 and connected to the upper end of the motor shaft 31, and is used to disperse the water entering the water inlet 22 to the water outlet 23 for spraying. The water supply mechanism 5 at least includes a water pipe 51 connected to the water source, the motor shaft 31 passes through from top to bottom and the lower end is connected to the water pipe 51, the guide member 6 is arranged below the spray arm 2 and connected to the water inlet 22, and a plurality of guide holes 61 are arranged at intervals on the outer peripheral wall of the lower part of the guide member 6, and a valve plate assembly 7 is arranged on the upper part of the guide member 6, which can close the lower end of the water inlet 22 when the motor shaft 31 inputs water to the spray arm 2 and open the lower end of the water inlet 22 when the centrifugal impeller 4 is started.

[0035] The centrifugal impeller 4 of this embodiment is rotatably disposed in the water collecting chamber 20, and the upper end of the motor shaft 31 passes through the centrifugal impeller 4 and is exposed in the water collecting chamber 20. After the upper end of the motor shaft 31 discharges water, the centrifugal impeller 4 can be covered to drive the centrifugal impeller 4 to work. For ease of assembly, the bottom of the guide member 6 is connected to the bottom wall of the water tank body 1 and has a first assembly hole 62 for the motor shaft 31 to pass through, and a bearing seal assembly 63 is disposed in the first assembly hole 62 to enable the motor shaft 31 to rotate relative to the guide member 6.

[0036] The valve disc assembly 7 of this embodiment includes a baffle plate 71, a first valve disc 72, a second valve disc 73 and a retaining ring 74. The baffle plate 71 is radially arranged in the middle of the guide member 6. A second assembly hole 711 for the power supply shaft 31 to pass through is opened in the middle of the baffle plate 71. The first valve disc 72 is rotatably arranged on a first side of the baffle plate 71 and can seal the first side of the baffle plate 71 and the corresponding inner wall of the guide member 6. The second valve disc 73 is rotatably arranged on the second side of the baffle plate 71 and can seal the second side of the baffle plate 71 and the corresponding inner wall of the guide member 6. The retaining ring 74 is circumferentially arranged on the inner wall of the guide member 6 and can be supported at the bottom edges of the first valve disc 72 and the second valve disc 73, thereby preventing water from flowing downward from the water inlet 22 of the spray arm 2. To facilitate assembly, both sides of the baffle 71 are respectively recessed inward to form mounting notches 712. Correspondingly, the side walls of the first valve plate 72 and the second valve plate 73 are provided with mounting blocks 723 which can be rotatably inserted into the corresponding mounting notches 712. The baffle 71 is provided with a connecting shaft 713 which can pass through the corresponding mounting notches 712 and the mounting blocks 723 to rotatably connect the first valve plate 72 and the second valve plate 73 to the baffle 71.

[0037] In this embodiment, a deceleration structure 8 is also provided which can reduce the rotation speed of the spray arm 2 by cutting the water flow. According to the flow direction of the water flow, the deceleration structure 8 is provided upstream of the water inlet 22 of the spray arm 2. Since the axial flow structure of the impeller is cancelled in this embodiment and a simple centrifugal impeller 4 is adopted, the rotation speed of the centrifugal impeller 4 is relatively high. If the rotation speed of the spray arm 2 is too high, it is not conducive to the bidirectional rotation of the spray arm 2. The above-mentioned deceleration structure 8 can effectively balance the rotation speed of the spray arm 2, and is conducive to the reversing rotation of the spray arm 2 while maintaining an efficient washing effect. The edge of the water inlet 22 of the spray arm 2 extends outward in the circumferential direction to form a first U-shaped groove 24 arranged around the water inlet 22. A through hole 221 is opened on the inner wall of the water inlet 22 for water flow to enter the first U-shaped groove 24. A plurality of blades 241 that can cut the water flow when the spray arm 2 is rotating and thus reduce the rotation speed of the spray arm 2 are arranged at intervals on the inner wall of the first U-shaped groove 24 away from the water inlet 22. The blades 241 and the first U-shaped groove 24 together constitute the above-mentioned deceleration structure 8. The deceleration structure only requires a small amount of water, and the deceleration effect of the spray arm 2 can be achieved by cutting the water flow with the blades 241. The structure is simple and practical. In order to facilitate connection, the spray arm 2 is rotatably arranged on the guide member 6 through the buckle 9. The upper end of the buckle 9 is rotatably connected to the deceleration structure 8, and the lower end of the buckle 9 is limitedly connected to the upper end of the guide member 6. Specifically, a second U-shaped groove 91 is formed on the upper part of the buckle 9 and can be rotatably buckled in the first U-shaped groove 24. The inner wall of the lower part of the buckle 9 has an internal thread 92. Correspondingly, the outer peripheral wall of the upper end of the guide member 6 has an external thread 64 matching the internal thread 92.

[0038] When the cleaning machine of this embodiment is used and turned on, the first valve plate 73 and the second valve plate 73 fall onto the retaining ring 74 by their own gravity to close the water inlet 22 of the spray arm 2. At this time, the hollow motor shaft 31 inputs a small amount of water into the water collecting chamber 20 of the spray arm 2 to immerse the centrifugal impeller 4. In this way, the centrifugal impeller 4 can continuously output water to the water outlet 23 for spraying when it rotates. While the centrifugal impeller 4 disperses the water flow, a negative pressure is generated in the water collecting chamber 20 to suck the water in the water tank body 1 upward from the guide hole 61 of the guide member 6. The sucked water flow pushes the first valve plate 72 and the second valve plate 73 upward, thereby opening the water inlet 22 and realizing the reciprocating use of water flow for washing. After the centrifugal impeller 4 pumps water normally, the motor shaft 31 can stop supplying water to the water collecting chamber 20. Since the present embodiment realizes the water flow conveying from bottom to top and can be separated from the operation of the axial flow impeller, the bidirectional rotation of the spray arm 2 can be realized by the forward and reverse rotation of the motor 3, thereby improving the cleaning effect.

Claims

1. A washing machine, comprising a water tank body (1), a spray arm (2), a motor (3) and a motor shaft (31), wherein the water tank body (1) is hollow inside to form a washing space, the spray arm (2) has a water inlet (22) and a water outlet (23) and is rotatably arranged in the washing space, the motor (3) is arranged outside the water tank body (1), and the motor shaft (31) is connected to the motor (3) and extends into the spray arm (2), characterized in that: Also includes A centrifugal impeller (4) is disposed in the spray arm (2) and connected to the upper end of the motor shaft (31), and is used to disperse water entering the water inlet (22) to the water outlet (23) for spraying; A water supply mechanism (5), wherein the motor shaft (31) passes through the motor shaft from top to bottom and is connected to the water supply mechanism (5) at its lower end; and A flow guide (6) is arranged below the spray arm (2) and connected to the water inlet (22); a plurality of flow guide holes (61) are arranged at intervals on the outer peripheral wall of the lower portion of the flow guide (6); and a valve plate assembly (7) is arranged on the upper portion of the flow guide (6) and is capable of closing the lower end of the water inlet (22) when the motor shaft (31) inputs water into the spray arm (2) and opening the lower end of the water inlet (22) when the centrifugal impeller (4) is started; The valve plate assembly (7) comprises: A baffle (71) is radially arranged at the middle of the flow guide (6) and has a second assembly hole (711) in the middle for the motor shaft (31) to pass through; A first valve plate (72) is rotatably disposed on a first side of the baffle plate (71) and is capable of sealing between the first side of the baffle plate (71) and a corresponding inner wall of the flow guide member (6); a second valve plate (73) rotatably disposed on the second side of the baffle plate (71) and capable of sealing between the second side of the baffle plate (71) and the corresponding inner wall of the guide member (6); and A retaining ring (74) is circumferentially arranged on the inner wall of the flow guide (6) and can be supported on the bottom edges of the first valve plate (72) and the second valve plate (73); It also includes a deceleration structure (8) capable of reducing the rotation speed of the spray arm (2) by cutting the water flow. According to the flow direction of the water flow, the deceleration structure (8) is arranged upstream of the water inlet of the spray arm (2); The edge of the water inlet (22) of the spray arm (2) extends outwardly in the circumferential direction to form a first U-shaped groove (24) arranged around the water inlet (22); a through hole (221) is provided on the inner wall of the water inlet (22) for water to flow into the first U-shaped groove (24); a plurality of blades (241) are arranged at intervals on the inner wall of the first U-shaped groove (24) away from the water inlet (22) and capable of cutting the water flow when the spray arm (2) is in a rotating state, thereby reducing the rotation speed of the spray arm (2); the blades (241) and the first U-shaped groove (24) together constitute the deceleration structure (8).

2. The cleaning machine according to claim 1, characterized in that: A water collecting chamber (20) is formed in the middle of the spray arm (2), and flow guide channels (21) are formed on both sides of the water collecting chamber (20) along the length direction of the spray arm (2). The water inlet (22) is provided on the lower wall surface of the spray arm (2) and is connected to the water collecting chamber (20), and the water outlet holes (23) are multiple and symmetrically arranged above the flow guide channels (21) on both sides of the water collecting chamber (20).

3. The cleaning machine according to claim 2, characterized in that: The centrifugal impeller (4) is rotatably disposed in the water collecting chamber (20), and the upper end of the motor shaft (31) passes through the centrifugal impeller (4) and is exposed in the water collecting chamber (20).

4. The cleaning machine according to claim 1, characterized in that: The bottom of the flow guide (6) is connected to the bottom wall of the water tank body (1) and has a first assembly hole (62) for the motor shaft (31) to pass through. A bearing seal assembly (63) is arranged in the first assembly hole (62) to enable the motor shaft (31) to rotate relative to the flow guide (6).

5. The cleaning machine according to claim 1, characterized in that: The two sides of the baffle (71) are respectively recessed inward to form mounting notches (712); correspondingly, the side walls of the first valve plate (72) and the second valve plate (73) are convexly provided with assembly blocks (723) which are rotatably inserted into the corresponding mounting notches (712); the baffle (71) is provided with a connecting shaft (713) which can pass through the corresponding mounting notches (712) and the assembly block (723) to rotatably connect the first valve plate (72) and the second valve plate (73) to the baffle (71).

6. The cleaning machine according to any one of claims 1 to 5, characterized in that: The spray arm (2) is rotatably arranged on the flow guide (6) via a buckle (9); the upper end of the buckle (9) is rotatably connected to the deceleration structure (8); and the lower end of the buckle (9) is position-limitingly connected to the upper end of the flow guide (6).

7. The cleaning machine according to claim 6, characterized in that: The upper part of the buckle (9) is formed with a second U-shaped groove (91) which can be rotatably buckled in the first U-shaped groove (24), and the inner wall of the lower part of the buckle (9) has an internal thread (92). Correspondingly, the outer peripheral wall of the upper end of the guide member (6) has an external thread (64) matching the internal thread (92).

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