WO2015100702A1

WO2015100702A1 - Open water pump and application thereof

Info

Publication number: WO2015100702A1
Application number: PCT/CN2014/001159
Authority: WO
Inventors: 郑峰; 徐慧; 练杨忠; 朱灯光; 李帅; 茅忠群; 诸永定
Original assignee: 宁波方太厨具有限公司
Priority date: 2013-12-31
Filing date: 2014-12-23
Publication date: 2015-07-09

Abstract

An open water pump comprises an upper housing, a lower housing and an impeller (51). The impeller (51) comprises a central shaft (511) and a vane (512). The vane (512) is divided into an upper section (5121) and a lower section (5122) in an axial direction. A flow guide ring (54) is arranged below the lower housing. A water flow channel between the flow guide ring (54) and the lower housing gradually becomes small from a periphery to a center. Also disclosed is a sink type cleaning machine applying the open water pump. The flow guide ring is arranged in a water inlet position of the open water pump, guides a water flow that enters through a water inlet, and enables the water flow to enter into a lower accommodation cavity (522) in order, thus reducing noise when the vane rotates to draw water. In addition, the water flow goes through an acceleration process before entering the lower accommodation cavity (522), helping form negative pressure and obtaining a good water drawing effect.

Description

Open water pump and its application

Technical field

The invention relates to a water pump, in particular an open water pump, and an application for a water pump.

Background technique

Before the pump is working, the water pump and the inlet pipe must be filled with water, and then the high-speed rotating impeller is used to obtain the energy of the liquid under the action of the inertial centrifugal force, thereby increasing the internal pressure. When the impeller rotates rapidly, the blade causes the water to rotate quickly. As the centrifugal force flies out of the impeller, the water in the pump is thrown, the central part of the impeller forms a vacuum area, and then the water of the water source enters the inlet pipe under the action of atmospheric pressure (or water pressure). Continuous circulation can be achieved by circulating. Because the pump has the advantages of simple structure, easy operation, easy adjustment of flow rate and suitable for transportation of various special materials, it is widely used in various fields, ranging from various industrial places to various household appliances such as washing machines and dishwashers. , air conditioning, etc.

In order to facilitate the manufacture and installation of the water pump, an open type water pump has been developed, such as a dishwasher disclosed in European Patent Publication No. EP 0 807 396 A2, which comprises a washing chamber for accommodating dishes, supported in a washing chamber. The bottom spray arm pumps a pump that pressurizes the spray arm, the pump includes an impeller, and the inner surface of the spray arm defines a housing for the impeller, allowing the washing liquid to pass from the housing to the nozzle of the spray arm, the impeller The blade includes a blade that is bent forward at a lower edge, and the bottom of the blade has an axial flow blade portion that engages with a spline shaft of the drive motor, and the axial flow blade portion lifts the fluid after the motor is started under no load. So that the pump is working properly.

However, in the above-mentioned open type water pump, since the water inlet of the water pump is below the casing, the water flow from any direction below the casing enters the casing and is lifted by the blades of the impeller, and then sprayed out from the spray arm due to the water flow. When the impeller rotates in the water, it will easily generate a large noise: when the water flow just enters the casing, its speed is slow, which is not conducive to the formation of negative pressure, thus affecting the impeller's drowning effect.

Summary of the invention

The first technical problem to be solved by the present invention is to provide an open type water pump for the problems of the above prior art, which is convenient for the water pump to drown and has less noise when drowning.

A second technical problem to be solved by the present invention is to provide a sink type washing machine to which the above-described open type water pump is applied.

The technical solution adopted by the present invention to solve the above first technical problem is: an open type water pump comprising an upper casing, a lower casing and an impeller, the impeller including a shaft at the center and a circumference on a circumferential surface of the shaft Multiple evenly distributed An axially extending blade, the blade being axially divided into an upper portion and a lower portion that are connected to each other, wherein the upper housing is formed with an upper receiving cavity for receiving an upper portion of the blade, and the lower housing is formed with The lower receiving cavity of the lower section of the blade is characterized in that: under the lower casing, a flow guiding ring is disposed, and a water flow passage between the guiding ring and the lower casing gradually decreases from the periphery toward the center.

The gradually decreasing water flow passage may be formed in such a manner that, in one embodiment of the invention, the upper surface of the flow guide ring is a slope which is gradually inclined upward from the periphery toward the center. In another embodiment of the invention, the upper surface of the flow guiding ring is an arcuate surface that is gradually inclined upward from the periphery toward the center, and the curved surface is convex or concave. The above shapes can guide the water flow entering at the water inlet to make it enter the lower receiving cavity in an orderly manner, thereby greatly reducing the noise when the impeller rotates in the water, and the water flow channel due to the water inlet is The outward inward is gradually reduced, so that the water flow has an accelerating process before entering the lower receiving cavity, which helps to form a negative pressure and obtain a better hydrophobic effect.

In order to better guide and accelerate the water flow, the lower surface of the lower casing is disposed at a position corresponding to the flow guiding ring with a corresponding annular flow guiding surface, and the flow guiding surface can cooperate with the flow guiding ring.

In order to facilitate the rotation of the impeller, the shaft of the impeller is connected to the output shaft of the motor through the diversion ring, and the motor rotates to drive the blade to rotate.

The technical solution adopted by the present invention to solve the above second technical problem is: a sink type washing machine comprising a tank body for forming a washing space, the tank body comprising a water tank body, wherein: the bottom of the water tank body is at least The central portion is formed with a draining region covered with a drain plate having a drain hole, the drain water region being provided with an open water pump as described above, the flow guiding ring being fixed at the bottom of the water tank body .

In an embodiment of the invention, the upper casing is a rotating spray arm covering the impeller, the rotary spray arm includes a pair of upper and lower covers, and the middle of the lower cover forms the The cavity is accommodated thereon, whereby the rotary spray arm is used as a water outlet component of the open water pump, and the water flow flows out from the side of the upper accommodation cavity and enters the flow passage.

In order to facilitate the flow of water from the rotating spray arm, a water outlet hole is defined in the upper cover body of the rotary spray arm, and a flow passage communicating with the upper receiving cavity is formed between the upper cover body and the lower cover body. The water outlet hole corresponds to the position of the flow channel, and the water pumped by the impeller flows out from the side surface of the upper accommodation cavity, and is sprayed from the water outlet hole through the flow channel.

In the embodiment of the present invention, the lower casing is a baffle, the center of the baffle forms the lower receiving cavity, and the guiding bracket is provided with a plurality of longitudinally extending mounting legs in a circumferential direction. The guide bracket is suspended at the bottom of the water tank body, so that the water inlet of the water pump is located below and on the side of the flow guide bracket, so that timely water supply can be performed.

In order to facilitate cleaning of the water pump, the top outer periphery of the flow guiding bracket has an upper stepped surface, and the upper casing rests on the upper step surface, and the upper casing only needs to be taken off the guiding bracket when cleaning the water pump. Take out the impeller.

Compared with the prior art, the invention has the advantages that a flow guiding ring is arranged at the water inlet of the open water pump, and the water flow entering at the water inlet is guided to make it enter the lower receiving cavity in an orderly manner. Therefore, the noise of the impeller rotating water is greatly reduced, and since the water flow passage of the water inlet is gradually reduced from the outside to the inside, the water flow has an accelerating process before entering the lower receiving cavity, which contributes to the formation. Negative pressure, get better water immersion effect; in the water pump The lower surface of the lower casing is provided with a flow guiding surface corresponding to the flow guiding ring, which can further strengthen the water flow for guiding and accelerating; the water tank type washing machine adopting the open water pump of the invention has better water immersing effect, so that The rotating spray arm has a good spray effect on the dishes, fruits and vegetables in the sink body, and the cleaning is relatively clean.

DRAWINGS

1 is a schematic view of a sink type washing machine according to an embodiment of the present invention;

Figure 2 is a partial cross-sectional view showing a sink type washing machine in accordance with an embodiment of the present invention;

3 is a schematic exploded view of an open type water pump according to an embodiment of the present invention;

4-1 is a schematic structural diagram of a flow guiding ring according to an embodiment of the present invention;

4-2 is a schematic structural view of another embodiment of a guide ring in an open type water pump according to the present invention;

4-3 is a schematic structural view of still another embodiment of a flow guiding ring in an open type water pump according to the present invention.

detailed description

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

As shown in FIG. 1 to FIG. 3, in a preferred embodiment of the sink type washing machine of the present invention, the sink type washing machine can be used for washing dishes, vegetables, fruits, etc., including a sink body 1, and a rotary connection. In the cover plate 2 at the top of the water tank body 1, the water tank body 1 may be a common water tank for household use, and the water tank body 1 and the cover plate 2 form a washing space for accommodating the above-mentioned dishes, vegetables, fruits, and the like, and cleaning them.

The bottom plate 11 of the water tank body 1 is recessed at least at a central portion, and above the concave portion of the bottom plate 11, is spaced apart from the drain plate 3 having the same shape as the concave portion, and the drain plate 3 is provided with a plurality of drain water for draining The space between the hole 31, the drain plate 3 and the recessed portion of the bottom plate 11 forms a drain area 32 which is flush with the other portions of the bottom plate 11. On the outer side of the water tank body 1, a motor 4 is mounted below the bottom plate 11, and the output shaft 41 of the motor 4 extends into the water tank body 1 and is located in the drain area 32 above the bottom plate 11.

An open type water pump 5 is disposed in the drain area 32. The water pump 5 includes an impeller 51 including a hollow shaft 511 at the center and a plurality of blades 512 disposed on the circumferential surface of the shaft 511. The blades 512 are on the circumference of the shaft 511. The upper portion is evenly distributed and extends in the axial direction, and the vane 512 is axially divided into an upper portion 5121 and a lower portion 5122 which are connected to each other. The lower end of the shaft 511 is connected to the output shaft 41 of the motor 4, whereby the impeller 51 can be driven when the motor 4 rotates. Turn.

A guide bracket 52 is disposed outside the impeller 51. The guide bracket 52 is provided with a plurality of mounting legs 521 in the circumferential direction. The mounting legs 521 can be fixed to the bottom plate 11 or the motor 4 by screws or the like, and the mounting legs 521 are longitudinally extended to make the guiding bracket A gap is formed between the bottom surface of the bottom surface 52 and the bottom surface of the drain portion 32 to form a suspended state at the bottom of the water tank body 1 for the passage of water in the drain water region 32. The lower section 5122 of the vane 512 is located in the lower receiving cavity 522 formed in the center of the baffle bracket 52, and the upper section 5121 is exposed to the baffle bracket 52, whereby the baffle bracket 52 forms the lower casing of the open type water pump 5. The outer circumference of the lower central receiving cavity 522 of the flow guiding bracket 52 has a lower step surface 524, and the lower portion of the drain plate 3 The surface abuts and the drain plate 3 rests on the lower step surface 524.

The top of the flow guiding bracket 52 is covered with a rotating spray arm 53 which is located above the drain plate 3, and the middle bottom thereof is formed with an upper receiving cavity 531 for accommodating the upper section 5121 of the blade 512, whereby the rotating spray arm 53 is rotated. The upper casing of the open type water pump 5 is formed, and the water pump 5 is used to pump out the water in the drain area 32, and the object to be cleaned (the dishes, vegetables, fruits, and the like described above) is washed by the rotary spray arm 53.

The lower side of the flow guiding bracket 52 is open, and the water flow can enter the impeller 51 from below and from the side of the guiding bracket 52. That is, the water inlet of the open water pump 5 is located below and on the side of the guiding bracket 52, and the opposite side of the rotating spray arm 53 The top surface of the cavity 531 is closed, and the water flows out from the side of the upper receiving cavity 531. That is, the water outlet of the open water pump 5 is located on the side of the rotating spray arm 53 that accommodates the cavity 531.

The rotating spray arm 53 includes a pair of upper cover 532 and a lower cover 533, and a flow passage communicating with the upper receiving cavity 531 is formed therebetween, and the upper receiving cavity 531 is located in the middle of the rotary spray arm 53. The flow passages are located on both sides of the upper receiving cavity 531. An upper stepped surface 525 is further provided at a position on the top outer periphery of the flow guiding bracket 52 at a position above the lower stepped surface 524, and abuts against the lower surface of the rotating spray arm 53, and the rotary spray arm 53 rests on the upper stepped surface 525. A plurality of water outlet holes 5321 are defined in the upper surface of the upper cover body 532. The water outlet holes 5321 are located above the flow channel. Corresponding to the flow channel, the water pumped by the impeller 51 enters the flow channel through the upper receiving cavity 531, thereby The water outlet hole 5321 is ejected, and the object to be cleaned is washed.

The bottom plate 11 is located below the flow guiding bracket 52, that is, the water inlet of the open water pump 5 is provided with a flow guiding ring 54, the position of the guiding ring 54 corresponds to the guiding bracket 52, and the output shaft 41 of the motor 4 is from the guiding ring The center of 54 is connected to the shaft 511 of the impeller 51, and the upper surface of the guide ring 54 is gradually inclined upward from the periphery toward the center, whereby the distance from the lower surface of the flow guiding bracket 52 is gradually decreased from the periphery toward the center, even if The water flow passage there is gradually reduced from the periphery to the center, and the flow guiding ring 54 can guide the water flow entering at the water inlet to make it enter the lower receiving cavity 522 in an orderly manner, thereby greatly reducing The noise when the impeller 51 rotates in the water, and the water flow passage of the water inlet gradually decreases from the periphery to the center, so that the water flow has an acceleration process before entering the lower accommodation cavity 522, contributing to the formation of a negative pressure. Get better water repellency.

In the present embodiment, referring to Fig. 4-1, the upper surface of the guide ring 54 is a slope 541 which is gradually inclined upward from the periphery toward the center.

The guide ring 54 can also be designed in other configurations. In another embodiment, as shown in FIG. 4-2, the upper surface of the guide ring 54 is an arcuate surface 542 that is gradually inclined upward from the periphery toward the center, and the curved surface is curved. In a further embodiment, as shown in Figure 4-3, the curved surface is concave.

Correspondingly, the lower surface of the flow guiding bracket 52 may also be provided with an annular flow guiding surface 523 corresponding to the air guiding ring 54. The shape of the flow guiding surface 523 may be symmetrical with the upper surface of the flow guiding ring 54.

Claims

An open type water pump comprising an upper casing, a lower casing and an impeller (51), the impeller (51) comprising a centrally located shaft (511) and uniformly distributed circumferentially on a circumferential surface of the shaft (511) a plurality of axially extending vanes (512), the vanes (512) being axially divided into an upper section (5121) and a lower section (5122) connected to each other, wherein the upper casing is formed with a receiving vane (512) The upper portion (5121) accommodates a cavity (531), and the lower housing is formed with a lower receiving cavity (522) for accommodating the lower portion (5122) of the blade (512), wherein:

A flow guiding ring (54) is disposed under the lower casing, and a water flow passage between the flow guiding ring (54) and the lower casing gradually decreases from the periphery toward the center.
The open type water pump according to claim 1, wherein the upper surface of the flow guiding ring (54) has a slope (541) which is gradually inclined upward from the periphery toward the center.
The open type water pump according to claim 1, wherein an upper surface of said flow guiding ring (54) has an arcuate surface (542) which is gradually inclined upward from a periphery toward a center, said curved surface (542) It is convex or concave.
The open type water pump according to any one of claims 1 to 3, characterized in that the lower surface of the lower casing is provided with a corresponding annular flow guiding surface at a position corresponding to the flow guiding ring (54) ( 523).
The open type water pump according to any one of claims 1 to 3, characterized in that the shaft (511) of the impeller (51) passes through the flow guiding ring (54) and the output shaft (41) of the motor. connection.
A tank type washing machine comprising a tank body for forming a washing space, the tank body comprising a water tank body (1), characterized in that at least a central portion of the bottom portion of the water tank body (1) is formed with a draining area (32), The drain region (32) is covered with a drain plate (3) with a drain hole (31), and the drain water region (32) is provided with an open water pump according to any one of claims 1-5. The flow guiding ring (54) is fixed to the bottom of the water tank body (1).
A sink type washing machine according to claim 6, wherein said upper casing is a rotary spray arm (53) covering said impeller (51), said rotary spray arm (53) including abutting upper The cover body (532) and the lower cover body (533) form an upper accommodation cavity (531) in the middle of the lower cover body (533).
The sink type washing machine according to claim 7, wherein the upper cover body (532) of the rotary spray arm (53) is provided with a water outlet hole (5321), the upper cover body (532) and the lower portion. A flow path communicating with the upper accommodation cavity (531) is formed between the cover bodies (533), and the water discharge holes (5321) correspond to the positions of the flow paths.
The sink type washing machine according to claim 6, wherein the lower casing is a flow guiding bracket (52), and a center of the guiding bracket (52) forms the lower receiving cavity (522). A plurality of longitudinally extending mounting legs (521) are provided in the circumferential direction of the flow guiding bracket (522) such that the flow guiding bracket (52) is suspended at the bottom of the water tank body (1).
A sink type washing machine according to claim 9, wherein said outer peripheral periphery of said flow guiding bracket (52) has an upper stepped surface (525), and said upper casing rests on said upper stepped surface (525) on.