CN110833369A - a cleaning machine - Google Patents

Abstract

The invention relates to a washing machine, comprising a water tank body, a spray arm, a motor, a motor shaft, a centrifugal impeller, a water supply mechanism and a flow guide. The centrifugal impeller is arranged in the spray arm and connected with the upper end of the motor shaft. The lower end of the flow guide is connected with the water supply mechanism, the flow guide is arranged under the spray arm and connected with the water inlet, the outer peripheral wall of the lower part of the flow guide is arranged with a plurality of guide holes at intervals, and the upper part of the flow guide is provided with a motor A valve plate assembly that closes the lower end of the water inlet when the axial spray arm inputs water and opens the lower end of the water inlet when the centrifugal impeller is activated. When using, first close the water inlet through the valve plate assembly, input a small amount of water into the axial spray arm of the motor to immerse the centrifugal impeller, stop the water supply to the motor shaft after the centrifugal impeller is started, and the water flow continuously enters the guide under the action of negative pressure and drives the valve. The sheet assembly opens the water inlet to realize the continuous supply of water flow, and the bidirectional rotation of the spray arm can be realized through the forward and reverse rotation of the motor, which improves the cleaning effect.

Description

a cleaning machine

technical field

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 technique

With the increasing improvement of people's living standards, dishwashers, as a kitchen appliance product, are increasingly entering the family. At present, dishwashers on the market are generally divided into three types: desktop type, cabinet type, and tank type. Among them, the desktop dishwasher is an integral independent structure, which is generally placed on the countertop for use; the cabinet type dishwasher is also an independent structure. , but it needs to be embedded in the kitchen cabinet; the trough dishwasher is combined with the sink and is generally installed in the kitchen cabinet.

For example, the structure disclosed in the Chinese patent "Sink Type Washing Machine" (application number: CN2013749864.9) with the authorization announcement number CN3735237B, the sink type washing machine includes a box body forming a washing space, and the box body includes a water tank body, and the water tank body is at least in The central part is concave, and the concave part is covered with a drain board with the same shape as the concave part. The drain board is provided with a plurality of drain holes for draining water, and the space between the recessed part and the drain board forms a drain area. , the draining plate is flush with other parts of the bottom of the water tank body, and a water pump is arranged in the draining area to pump out the water in the draining area to the top of the draining plate. At present, the above-mentioned washing machines mainly use the impact force of water flow to clean the food residues on the tableware. Generally, the tableware is placed vertically in the bowl rack, and the spray arm rotates in one direction, so that the water flow roughly moves tangentially along the surface of the dishes. This removes food residues and the like. After the water flow touches the dishes, the impact force will be greatly attenuated. When the spray arm can only rotate in one direction, it is easy to clean one side of the dishes and the other side is not clean.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a cleaning machine that can rotate the spray arm in both directions so as to improve the cleaning effect according to the current situation of the prior art.

The technical solution adopted by the present invention to solve the above technical problems is as follows: a washing machine, comprising a water tank body, a spray arm, a motor and a motor shaft, the interior of the water tank body is hollow to form a washing space, and the spray arm has a water inlet and a water outlet hole and can be rotatably arranged in the washing space, the motor is arranged outside the water tank body, the motor shaft is connected with the motor and extends into the spray arm, and is characterized in that: it also includes

The centrifugal impeller is arranged in the spray arm and connected with the upper end of the motor shaft, and is used for dispersing the water entering the water inlet to the water outlet for spraying;

a water supply mechanism, the motor shaft penetrates up and down and the lower end is connected with the water supply mechanism; and

A flow guide 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 flow guide; A valve plate assembly that closes the lower end of the water inlet when water is input to the spray arm, and opens the lower end of the water inlet when the centrifugal impeller is activated.

Preferably, a water collecting cavity is formed in the middle of the spray arm, two sides of the water collecting cavity are respectively formed with diversion channels extending along the length direction of the spray arm, and the water inlet is opened on the lower wall surface of the spray arm It is communicated with the water collecting cavity, and the water outlet holes are multiple and symmetrically arranged above the diversion channels on both sides of the water collecting cavity. The water outlet holes are arranged symmetrically on the spray arm to balance the recoil force of the water flow when the spray arm rotates forward and reverse, and also ensures that the washing effect of the dishes is consistent during forward and reverse rotation.

In the present invention, the centrifugal impeller is rotatably arranged in the water collection chamber, and the upper port of the motor shaft passes through the centrifugal impeller and is exposed in the water collection chamber. The centrifugal impeller can be covered after the water comes out of the port on the motor shaft to drive the centrifugal impeller to work.

In order to facilitate assembly, the bottom of the deflector is connected to the bottom wall of the water tank body and has a first assembly hole for the motor shaft to pass through. The first assembly hole is provided with a motor shaft that can rotate relative to the deflector. bearing seal assembly.

In each of the above solutions, the valve plate assembly includes

a baffle plate, which is radially arranged in the middle of the air guide, and a second assembly hole for the motor shaft to pass through is opened in the middle;

The first valve plate is rotatably arranged on the first side of the baffle and can seal between the first side of the baffle and the corresponding inner wall of the flow guide;

A second valve plate, rotatably disposed on the second side of the baffle and capable of sealing between the second side of the baffle and the corresponding inner wall of the flow guide; and

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

When the washing machine is turned on, the first valve plate and the second valve plate fall to the retaining ring by their own gravity to close the water inlet of the spray arm. Submerged, so that when the centrifugal impeller rotates, the water flow can be continuously output to the water outlet, and at the same time when the centrifugal impeller disperses the water flow, the negative pressure in the water collecting cavity will guide the water in the water tank body from the guide member. The hole is sucked upward, and the sucked water flow pushes the first valve plate and the second valve plate upward, thereby opening the water inlet to realize the reciprocating use and washing of the water flow. After the centrifugal impeller pumps water normally, the motor shaft can stop collecting water. Water supply in the cavity.

In order to facilitate assembly, two sides of the baffle plate are respectively recessed inward to form installation notches. Correspondingly, the side walls of the first valve plate and the second valve plate are protruded with rotatable insertion in the corresponding installation notches. The baffle plate is provided with a connecting shaft which can pass through the corresponding installation notch and the assembly block to connect the first valve plate and the second valve plate to the baffle plate rotatably.

As an improvement, the cleaning machine further includes a deceleration structure capable of reducing the rotational speed of the spray arm through water flow cutting, and 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 rotational speed of the centrifugal impeller is relatively large, and if the rotational speed of the spray arm is too large, it is unfavorable for the spray arm to rotate in both directions. Balance the rotation speed of the spray arm, which is conducive to the reversing rotation of the spray arm on the premise of maintaining the efficient washing effect.

Preferably, the edge of the water inlet of the spray arm extends outward along the circumferential direction to form a first U-shaped groove arranged around the water inlet, and the inner wall of the water inlet is provided with a passage for the water supply to enter the first U-shaped groove. The inner wall of the first U-shaped groove away from the water inlet side is spaced with a plurality of blades that can cut the water flow under the rotating state of the spray arm to reduce the rotation speed of the spray arm. Together they form the deceleration structure. The deceleration structure only needs a small amount of water, and the deceleration effect of the spray arm can be achieved by cutting the water flow through the blades, and the structure is simple and practical.

In order to facilitate connection, the spray arm is rotatably arranged on the flow guide through a buckle, the upper end of the buckle is rotatably connected with the deceleration structure, and the lower end of the buckle is connected with the upper end of the flow guide in a limited position.

Preferably, the upper part of the buckle is formed with a second U-shaped groove rotatably buckled in the first U-shaped groove, the inner wall of the lower part of the buckle has internal threads, and correspondingly, the upper end of the guide member is There is an external thread matched with the internal thread on the outer peripheral wall.

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 cleaning machine, and adopts an independent centrifugal impeller structure. The water is pumped into the spray arm. In the present invention, the motor shaft is set as 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 axial spray arm of the motor to immerse the centrifugal impeller. After the centrifugal impeller is started The water supply to the motor shaft is stopped, and the water flow continuously enters the flow guide under the action of negative pressure and drives the valve plate assembly to open the water inlet to realize the continuous supply of water flow. , The two-way rotation of the spray arm can be realized through the forward and reverse rotation of the motor, thereby improving the cleaning effect.

Description of drawings

1 is a schematic structural diagram of an embodiment of the present invention;

2 is a schematic diagram of the connection structure of a motor, a flow guide, and a spray arm in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2 (including the motor shaft);

4 is a schematic structural diagram of a flow guide in an embodiment of the present invention;

Fig. 5 is the sectional view of Fig. 4 (the first valve plate is hidden);

6 is a cross-sectional view of a spray arm in an embodiment of the present invention;

Fig. 7 is the enlarged structural representation of A part in Fig. 6;

FIG. 8 is a schematic structural diagram of a buckle in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in FIGS. 1-8 , the washing 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 flow guide 6 , and the water tank body 1 is hollow inside so that the A washing space is formed, and the spray arm 2 is rotatably arranged at the bottom of the washing space. A water collecting cavity 20 is formed in the middle of the spray arm 2. The two sides of the water collecting cavity 20 respectively extend to both sides along the length direction of the spray arm 2 to form a diversion channel 21. The water inlet 22 communicated with the water collecting cavity 20, the upper wall surface of the spray arm 2 corresponding to the guide channel 21 has a plurality of water outlet holes 23 arranged at intervals and communicated with the guide channel 21, and the two water collecting chambers 20 are open. The water outlet holes 23 above the side guide channels 21 are arranged symmetrically.

In this embodiment, the motor 3 is disposed 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 cavity 20 of the spray arm 2 . The centrifugal impeller 4 is arranged in the water collecting chamber 20 of the spray arm 2 and is 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 hole 23 for spraying. The connected water pipe 51, the motor shaft 31 penetrates up and down and the lower end is connected with the water pipe 51, the guide member 6 is arranged under the spray arm 2 and is connected with the water inlet 22, and the outer peripheral wall of the lower part of the guide member 6 is arranged at intervals. There are two guide holes 61, and the upper part of the guide member 6 is provided with a valve that 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 activated. Sheet assembly 7.

The centrifugal impeller 4 of this embodiment is rotatably disposed in the water collecting chamber 20 , the upper port of the motor shaft 31 is exposed in the water collecting chamber 20 through the centrifugal impeller 4 , and the centrifugal impeller 4 can be covered by the upper port of the motor shaft 31 after water is discharged , to drive the centrifugal impeller 4 to work. In order to facilitate assembly, the bottom of the deflector 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. The bearing seal assembly 63 for the rotation of the deflector 6 .

The valve plate assembly 7 in this embodiment includes a baffle plate 71 , a first valve plate 72 , a second valve plate 73 and a retaining ring 74 . The power supply motor shaft 31 passes through the second assembly hole 711, and the first valve plate 72 is rotatably arranged on the first side of the baffle 71 and can seal between the first side of the baffle 71 and the corresponding inner wall of the guide member 6, The second valve plate 73 is rotatably disposed on the second side of the baffle 71 and can seal the second side of the baffle 71 and the corresponding inner wall of the flow guide 6 , and the baffle 74 is arranged on the inner wall of the flow guide 6 in the circumferential direction And can be supported on the edge of the bottom surface of the first valve plate 72 and the second valve plate 73 , so as to prevent water from flowing downward from the water inlet 22 of the spray arm 2 . In order to facilitate assembly, two sides of the baffle plate 71 are recessed inwardly to form installation notches 712. Correspondingly, the side walls of the first valve plate 72 and the second valve plate 73 are protruded with rotatably inserted in the corresponding installation notches. In the assembly block 723 in 712, the baffle plate 71 is provided with a connecting shaft 713 that can rotatably connect the first valve plate 72 and the second valve plate 73 to the baffle plate 71 through the corresponding installation notch 712 and the assembly block 723.

In this embodiment, a deceleration structure 8 capable of reducing the rotational speed of the spray arm 2 by cutting by water flow is also provided. Since this embodiment cancels the axial flow structure of the impeller and adopts a simple centrifugal impeller 4, the rotational speed of the centrifugal impeller 4 is relatively large, and if the rotational speed of the spray arm 2 is too large, it is unfavorable for the spray arm 2 to rotate in both directions, and the above deceleration structure is provided. 8. It can effectively balance the rotation speed of the spray arm 2, and under the premise of maintaining the high-efficiency washing effect, it is conducive to the reversing rotation of the spray arm 2. The edge of the water inlet 22 of the spray arm 2 extends outward along the circumferential direction to form a first U-shaped groove 24 arranged around the water inlet 22, and the inner wall of the water inlet 22 has a through hole for the water supply to enter the first U-shaped groove 24. 221, the inner wall of the first U-shaped groove 24 on the side away from the water inlet 22 is spaced with a plurality of blades 241 that can cut the water flow under the rotating state of the spray arm 2 to reduce the rotational speed of the spray arm 2. The blades 241 and the first U The shaped grooves 24 together constitute the above-mentioned deceleration structure 8. The deceleration structure only needs a small amount of water, and the deceleration effect of the spray arm 2 can be achieved by cutting the water flow through the blades 241, and the structure is simple and practical. In order to facilitate connection, the spray arm 2 is rotatably arranged on the flow guide 6 through a buckle 9 , the upper end of the buckle 9 is rotatably connected with the deceleration structure 8 , and the lower end of the buckle 9 is connected with the upper end of the flow guide 6 in a limited position. Specifically, the upper part of the buckle 9 is formed with a second U-shaped groove 91 rotatably buckled in the first U-shaped groove 24 , the inner wall of the lower part of the buckle 9 has internal threads 92 , and correspondingly, the upper end of the air guide 6 There is an external thread 64 matching the internal thread 92 on the outer peripheral wall of the .

Using the washing machine of this embodiment, when the washing machine is turned on, the first valve plate 73 and the second valve plate 73 fall to 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 The 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, so that when the centrifugal impeller 4 rotates, the water flow can be continuously output to the water outlet 23, and the water flow of the centrifugal impeller 4 is dispersed. At the same time, 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, and the suctioned water flow pushes the first valve plate 72 and the second valve plate 73 upwards, Thus, the water inlet 22 is opened to realize the reciprocating use and washing of the water flow. After the centrifugal impeller 4 pumps water normally, the motor shaft 31 can stop supplying water to the water collecting chamber 20 . Since the water flow can be transported from bottom to top in this embodiment and can be separated from 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 (10)

1. The utility model provides a cleaning machine, includes basin body (1), spray arm (2), motor (3) and motor shaft (31), thereby the inside cavity of basin body (1) forms the washing space, spray arm (2) have water inlet (22) and apopore (23) and can locate the washing space with rotating, outside basin body (1) was located in motor (3), motor shaft (31) were connected with motor (3) and stretched into spray arm (2), its characterized in that: also comprises

The centrifugal impeller (4) is arranged in the spray arm (2), is connected with the upper end of the motor shaft (31), and is used for dispersing water entering the water inlet (22) to the water outlet (23) and spraying the water;

the motor shaft (31) penetrates through the water supply mechanism (5) up and down, and the lower end of the motor shaft is connected with the water supply mechanism (5); and

water conservancy diversion spare (6), locate spray arm (2) below and be connected with water inlet (22), interval arrangement has a plurality of water conservancy diversion holes (61) on the periphery wall of water conservancy diversion spare (6) lower part, water conservancy diversion spare (6) upper portion is provided with can be closed water inlet (22) lower extreme and valve block subassembly (7) of opening water inlet (22) lower extreme under centrifugal impeller (4) the starting state to spray arm (2) input water state at motor shaft (31).

2. The cleaning machine of claim 1, wherein: the middle part of spray arm (2) is formed with water collecting cavity (20), and the both sides in this water collecting cavity (20) extend along spray arm (2) length direction respectively and are formed with water conservancy diversion passageway (21), water inlet (22) are seted up on the lower wall of spray arm (2) and are linked together with water collecting cavity (20), apopore (23) are a plurality of and at water conservancy diversion passageway (21) top symmetrical arrangement of water collecting cavity (20) both sides.

3. The cleaning machine of claim 2, wherein: the centrifugal impeller (4) can be rotatably arranged in the water collecting cavity (20), and the upper port of the motor shaft (31) penetrates through the centrifugal impeller (4) to be exposed out of the water collecting cavity (20).

4. The cleaning machine of claim 1, wherein: the bottom of the flow guide part (6) is connected with the bottom wall of the water tank body (1) and is provided with a first assembly hole (62) for a motor shaft (31) to pass through, and a bearing sealing assembly (63) capable of enabling the motor shaft (31) to rotate relative to the flow guide part (6) is arranged in the first assembly hole (62).

5. The cleaning machine of claim 1, wherein: the valve plate component (7) comprises

The baffle (71) is arranged at the middle part of the flow guide piece (6) along the radial direction, and the middle part of the baffle is provided with a second assembly hole (711) for the motor shaft (31) to pass through;

the first valve plate (72) is rotatably arranged on the 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 flow guide part (6);

the second valve plate (73) can be 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 flow guide part (6); and

and the retainer ring (74) is arranged on the inner wall of the flow guide piece (6) along the circumferential direction and can bear the bottom edges of the first valve plate (72) and the second valve plate (73).

6. The cleaning machine of claim 5, wherein: the two sides of the baffle (71) are respectively inwards recessed 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 assembling blocks (723) which can be rotatably inserted into the corresponding mounting notches (713), and the baffle (71) is provided with a connecting shaft (713) which can penetrate through the corresponding mounting notches (712) and the assembling blocks (723) to rotatably connect the first valve plate (72) and the second valve plate (73) to the baffle (71).

7. The cleaning machine of any one of claims 1-6, wherein: the water spray device is characterized by further comprising a speed reducing structure (8) capable of reducing the rotating speed of the spray arm (2) through water flow cutting, wherein the speed reducing structure (8) is arranged on the upstream of the water inlet of the spray arm (2) according to the flowing direction of water flow.

8. The cleaning machine of claim 7, wherein: the water inlet (22) edge of spray arm (2) outwards extends along circumference and is formed with first U-shaped groove (24) that surround water inlet (22) and arrange, it has through-hole (221) that supplies rivers to get into in first U-shaped groove (24) to open on water inlet (22) inner wall, thereby interval arrangement has a plurality of can cut rivers and reduce blade (241) of spray arm (2) rotational speed under spray arm (2) rotation state on the inner wall of water inlet (22) side in first U-shaped groove (24), this blade (241) with first U-shaped groove (24) constitute jointly speed reduction structure (8).

9. The cleaning machine of claim 8, wherein: spray arm (2) can locate water conservancy diversion spare (6) through buckle (9) with rotating on, this buckle (9) upper end with speed reduction structure (8) rotate and are connected, this buckle (9) lower extreme with water conservancy diversion spare (6) upper end limit is connected.

10. The cleaning machine of claim 9, wherein: the upper portion of the buckle (9) is provided with a second U-shaped groove (91) which can be reversely buckled in the first U-shaped groove (24) in a rotating mode, an inner thread (92) is arranged on the inner wall of the lower portion of the buckle (9), and correspondingly, an outer thread (64) matched with the inner thread (92) is arranged on the outer peripheral wall of the upper end of the flow guide piece (6).

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