CN209884071U

CN209884071U - Dish washer with suspension spray arm

Info

Publication number: CN209884071U
Application number: CN201822136470.7U
Authority: CN
Inventors: 苑俊磊; 徐伟; 杨林
Original assignee: Qingdao Haier Dishwasher Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2020-01-03
Anticipated expiration: 2028-12-19

Abstract

The utility model provides a dish washer with suspension spray arm, include: the inner container is used for containing articles to be washed; the water pump is arranged at the bottom of the inner container, and a washing impeller for providing washing power is arranged on the water pump; the spraying arm is arranged in the inner container, the spraying arm and the water pump are coaxially arranged, and the spraying arm is in a suspension state when spraying. The spray arm is in a suspension state during spraying, so that the spray arm is not in contact with other parts during spraying, the friction during rotation of the spray arm is reduced, the abrasion during rotation of the spray arm is avoided, and the rotating spraying speed and efficiency of the spray arm are improved; meanwhile, the arrangement of a rotatable part of the spray arm is saved, the height of the spray arm is reduced, a washing water path is shortened, the occupation of the space of the inner container is reduced, and the installation and manufacturing cost is reduced. The spray arm and the water pump are coaxially arranged, and the water flow sprayed upwards through the water pump supports the spray arm to be in a suspended state and enables the spray arm to rotate.

Description

Dish washer with suspension spray arm

Technical Field

The utility model belongs to the technical field of dish washer, concretely relates to dish washer with suspension spray arm.

Background

With the improvement of living standard, the requirements of people on living quality are higher and higher, so that the requirements on the quality, the performance, the humanization of use, the intellectualization of operation and the like of living goods are higher and higher. The dish washing machine as a convenient living article also comes into the life of people. In a dishwasher, a sprayer is one of the key parts of the dishwasher, and directly influences whether tableware can be washed clean or not.

At present, the water jet component inside the dish washer mainly takes a spray arm structure as a main component inside the dish washer, and the spray arm is one of important components inside the dish washer and drives the spray arm to directionally rotate through water flow to spray water flow to wash dishes. The spray wall can be rotatably arranged on the bracket or the water inlet connecting pipe, namely the spray wall can rotate around a shaft, and the rotatable connection between the spray wall and the bracket or the water inlet connecting pipe often generates abrasion; and often fine food residues enter between the rotatable parts, so that the rotating friction is large, the rotating speed of the spray wall is seriously influenced, and the cleaning effect is influenced.

For example, chinese patent application No. CN201320297385.3 discloses a spray arm device for a dishwasher and a dishwasher having the same, the spray arm device for the dishwasher including: a water inlet pipe; the spray arm assembly is rotatably connected with the water inlet pipe and comprises a spray arm water pipe and a spray arm, wherein the first end of the spray arm water pipe extends into the water inlet pipe, and the second end of the spray arm water pipe is connected with the spray arm outside the water inlet pipe; that is, the inlet pipe corresponds to the shaft housing and the spray arm water pipe corresponds to the rotation shaft so that the spray arm assembly is rotatable with respect to the inlet pipe.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that exists among the prior art, provide a dish washer with suspension spray arm, through setting up the spray arm that the suspension sprayed, the spray arm is in the suspended state when spraying, has reduced the friction when the spray arm is rotatory.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a dishwasher having a suspended spray arm, comprising:

the inner container is used for containing articles to be washed;

the water pump is arranged at the bottom of the inner container, and a washing impeller for providing washing power is arranged on the water pump;

the spraying arm is arranged in the inner container, the spraying arm and the water pump are coaxially arranged, and the spraying arm is in a suspension state when spraying.

Furthermore, a spraying chamber is arranged in the spraying arm, the washing impeller drives washing liquid to be sprayed upwards into the spraying chamber, and the upward force given to the spraying arm by the washing liquid is greater than or equal to the downward gravity borne by the spraying arm.

Furthermore, the spraying cavity is provided with a water inlet cavity positioned in the middle of the spraying arm and a spraying runner communicated with the water inlet cavity and provided with spraying holes, and the top wall of the water inlet cavity is provided with a positioning part which extends downwards and is used for rotating the spraying arm.

Furthermore, the positioning part and the washing impeller are coaxially arranged, and the positioning part is positioned above the washing impeller.

Furthermore, location portion is the basin shape, the washing impeller have fix the epaxial wheel hub of pump of water pump and set up in a plurality of first blades of wheel hub axle, the radial dimension of wheel hub is greater than the radial dimension of location portion bottom.

Further, the lower end surface of the positioning part is provided with a bottom surface and an arc-shaped side surface which is in smooth transition with the bottom surface.

Further, the upper portion of the hub has an upwardly and outwardly extending flared section.

Furthermore, the upper end surface of the first blade is in an arc shape extending upwards and radially outwards, and the inner side of the upper end surface of the first blade is connected with the upper end surface of the hub.

Furthermore, a spraying cavity is arranged in the spraying arm, and the upper part of the washing impeller is positioned in the spraying cavity.

Furthermore, the first blade is provided with a first flow guiding section which guides the washing liquid to the axial direction of the washing impeller and upwards along the axial direction of the washing impeller, and a second accelerating section which accelerates the washing liquid upwards along the axial direction of the washing impeller, and the second accelerating section is vertically arranged.

Furthermore, the first flow guide section is of an arc-shaped spiral structure.

Furthermore, the first blade is also provided with a third flow guide section which guides the washing liquid to the radial direction of the washing impeller, and the third flow guide section is positioned in the spraying cavity.

Furthermore, a flow guide structure which plays a role in guiding and buffering the flowing of the washing liquid in the spraying cavity is arranged between the water inlet cavity and the spraying flow passage.

Furthermore, an opening is formed between the flow guide structure and the inner wall of the spraying arm, and washing liquid is conveyed to the spraying flow channel from the water inlet cavity from the opening.

Furthermore, the flow guide structure comprises a first flow guide section which enables the washing liquid to move along at least one section of circular track after entering the spraying chamber.

Furthermore, the flow guide structure comprises a second flow guide section which guides the washing liquid to enter the spraying flow channel from the opening.

The utility model provides a dish washing machine, through the spray arm is in the suspended state when spraying, make the spray arm not contact with between other parts when spraying, reduced the friction when the spray arm rotates, avoided the wearing and tearing when the spray arm rotates, be favorable to the promotion of the speed, the efficiency that the spray arm rotated to spray; meanwhile, the arrangement of a rotatable part of the spray arm is saved, the height of the spray arm is reduced, a washing water path is shortened, the occupation of the space of the inner container is reduced, and the installation and manufacturing cost is reduced. The spraying arm and the water pump are coaxially arranged, and the water flow sprayed upwards through the water pump supports the spraying arm to be in a suspended state and enables the spraying arm to rotate.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a dishwasher having a suspension spray arm according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is an enlarged schematic view of the washing impeller;

FIG. 7 is a schematic view of a spray arm configuration;

FIG. 8 is a schematic diagram of the exploded structure of FIG. 7;

FIG. 9 is a schematic structural view of the lower housing of FIG. 8;

FIG. 10 is an enlarged schematic view of the water pump;

FIG. 11 is a schematic view of the drain chamber of FIG. 10 from below with the drain impeller removed;

FIG. 12 is a schematic sectional view taken along line A-A in FIG. 11;

fig. 13 is a schematic view of a portion of the structure of fig. 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.

In the description of the present invention, it should be noted that the directions or the positional relationships indicated by the terms "inner", "upper", "lower", "left", "right", and the like are based on the positional relationships shown in the drawings, and the side close to the user in the normal use state of the product is "front", and the side away from the user is "rear". The terminology is for the purpose of describing the invention only and is not intended to be limiting of the invention since it is not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 13, an embodiment of a dishwasher having a suspension spray arm according to the present invention is a dishwasher having a suspension spray arm, comprising: the washing machine comprises an inner container 10 for containing articles to be washed, a water pump 1 arranged at the bottom of the inner container 10 and a spray arm 2 arranged in the inner container 10, wherein a washing impeller 11 for providing washing power is arranged on the water pump 1, the spray arm 2 and the water pump 1 are coaxially arranged, and the spray arm 2 is in a suspension state when spraying. The spray arm 2 is in a suspension state during spraying, so that the spray arm 2 is not in contact with other parts during spraying, the friction during rotation of the spray arm 2 is reduced, the abrasion during rotation of the spray arm 2 is avoided, and the rotation spraying speed and efficiency of the spray arm 2 are improved; meanwhile, the arrangement of a rotatable part of the spray arm 2 is saved, the height of the spray arm 2 is reduced, a washing water path is shortened, the occupation of the space of the inner container is reduced, and the installation and manufacturing cost is reduced. The spray arm 2 and the water pump 1 are coaxially arranged, and the spray arm 2 is supported in a suspended state by water flow sprayed upwards through the water pump 1 and is enabled to rotate.

The spray arm 2 and the water pump 1 are not fixedly assembled, the spray arm 2 and other parts are not fixedly assembled, and an assembly-free structure is arranged between the spray arm 2 and the water pump 1, or the spray arm 2 is in the assembly-free structure; the spray arm 2 can achieve suspended rotary spraying, and is related to the matching relationship between the spray arm 2 and the water pump 1 and the structure of the spray arm 2.

The water pump 1 is provided with a washing impeller 11 for providing washing power, and the upper part of the washing impeller 11 is positioned in the spraying chamber 21. The upper part of the washing impeller 11 is arranged in the spraying chamber 21, so that the length of a water path between the water pump 1 and the spraying arm 2 is shortened, the height of the spraying arm 2 in the inner container is reduced, and the spatial arrangement of the dish washing machine is facilitated; and the connecting pipe from the water pump 1 to the spray arm 2 is avoided, so that the space is saved, the operations of connection, sealing and the like of the connecting pipe are also saved, and the manufacturing efficiency is improved.

When the spray arm 2 does not operate, the spray arm 2 receives gravity and a supporting force given by the supporting cover 15, specifically, the gravity of the spray arm 2 acts on the first radial surface 1521 of the first fitting portion 152. When the spray arm 2 works, the cleaning liquid pumped up by the water pump 1 is sprayed into the spray chamber 21, the spray arm 2 is provided with upward movement and suspension force, the spray arm 2 has gravity, and the cleaning liquid flowing in the spray arm 2 also has gravity; in order to achieve suspension of the spray arm 2, the washing liquid imparts an upward force to said spray arm 2 that is greater than or equal to the downward gravitational force to which the spray arm 2 is subjected. When the spray arm 2 starts to move upwards, it is certain that the upward force given to the spray arm 2 by the washing liquid is greater than the downward gravity force to which the spray arm 2 is subjected; certainly, the displacement of the spray arm 2 which starts to move upwards is small, and the spray arm 2 can be jacked upwards mainly by the force of upward jet of the uplifted water flow when the water pump 1 starts to work; preferably, during the subsequent spraying process, the washing liquid pumped up by the water pump 1 gives the spray arm 2 an upward force equal to the downward gravity force to which the spray arm 2 is subjected, ensuring that the spray arm 2 is suspended in a relatively stable position.

Referring to fig. 8, the spray arm 2 has an upper housing 28 and a lower housing 29; and a spraying chamber 21 formed by buckling an upper shell 28 and a lower shell 29, wherein the upper shell 28 and the lower shell 29 are in smooth transition connection, and the upper part and the lower part can be understood as the upper part and the lower part in the vertical direction when the spraying arm 1 is horizontally placed

Referring to fig. 7-9, the upper end surface of the spray arm 2 is provided with inclined spray holes 22, the spray holes 22 form a certain included angle with a plane passing through the axis of the spray arm 2, and the inclined spray holes 22 give a reverse force to the spray arm 2 when spraying water flow, so as to push the spray arm 2 to rotate. In order to realize that the spray arm 2 can rotate around the axis thereof, the spray chamber 21 is provided with a water inlet cavity 211 positioned in the middle of the spray arm 2, and the axis of the water inlet cavity 211 is coincident with the axis of the spray arm 2; a positioning part 213 extending downwards is arranged on the top wall of the water inlet cavity 211, and the positioning part 213 is used for positioning the rotation of the spray arm 2 and realizing the rotation of the spray arm 2 around the axis thereof. The positioning part 213 is disposed coaxially with the washing impeller 11, and the positioning part 213 is located above the washing impeller 11.

Referring to fig. 6, the washing impeller 11 has a hub 111 and a plurality of first blades 112 provided on the hub 111, the hub 111 is fixed to the pump shaft 12, when the washing impeller 11 rotates, the first blades 112 function to lift water flow, that is, the water flow is certainly outside the hub 111, that is, the water flow lifted by the washing impeller 11 is in a hollow circular ring shape, and the upper portion of the hub 111 has a flared section extending upward and outward, in the upper part of the first blades 112 there is a third flow-guiding section 1123 which guides the washing liquid in the radial direction of the washing impeller 11, the hollow, circular, annular water stream that is lifted by the washing impeller 11 thus has a tendency to move upwards and outwards when leaving the washing impeller 11, i.e. there is almost no water flow directly above the hub 111, but moving the water stream upwardly and outwardly after striking the top wall of the inlet chamber 211 will certainly cause the water stream to diverge; therefore, the positioning part 213 is arranged to guide the water flow leaving the washing impeller 11, and the water flow enters the flow direction spraying holes 22, so that the water flow is prevented from being pushed and extruded at the positioning part 213 to form turbulent flow; and the positioning portion 213 is uniformly forced in the circumferential direction, the rotation of the positioning portion 213 can now be surrounded.

Preferably, the positioning portion 213 has a basin shape, and the lower end surface of the positioning portion 213 has a bottom surface 2131 and an arc-shaped side surface 2132 that smoothly transitions with the bottom surface 2131. The radial dimension of the hub 111 is larger than the radial dimension of the bottom 2131 of the positioning portion 213, that is, it is ensured that the water flow raised by the washing impeller 11 does not reach the bottom 2131 of the positioning portion 213, and the arc-shaped side 2132 plays a role of guiding the water flow in the circumferential direction.

Referring to fig. 9, the spray chamber 21 further includes a spray passage 212 communicating with the inlet chamber 211, and the spray holes 22 are provided on the spray passage 212. A flow guide structure 214 for guiding and buffering the flow of the washing liquid in the spraying chamber 21 is arranged between the water inlet cavity 211 and the spraying flow passage 212, and the washing liquid enters the spraying flow passage 212 under the guidance of the flow guide structure 214 after entering the water inlet cavity 211. The flow guide structure 6 is configured to convey the washing liquid from the water inlet cavity 211 of the spraying chamber 21 to the spraying flow channel 212 along at least one section of circumferential track, and the circumferential motion reduces the impact of the washing liquid on the inner wall of the spraying arm 2 after entering the spraying chamber 21, and also avoids the phenomenon of sudden pressure increase in the spraying chamber 21. The water conservancy diversion structure 214 and spray arm 1 inner wall integrated into one piece extend the setting to spraying cavity 21 in, have reduced the basin area of washing liquid in spraying cavity 21, through the guide of water conservancy diversion structure 214, have avoided the clashing that the too fast inflow brought, have produced certain guide effect to the flow direction of washing liquid.

An opening 2143 is disposed between the flow guiding structure 214 and the inner wall of the spray arm 2, and the cleaning liquid is transported from the inlet cavity 211 to the spray flow channel 212 through the opening 2143. After entering the inlet cavity 211 of the spray chamber 21, the washing liquid is guided by the guiding structure 214 and is delivered from the inlet cavity 211 to the spray flow channel 212 through the opening 2143.

The flow guiding structure 214 further includes a first flow guiding section 2141 for guiding the washing liquid to move along at least one section of circular track after entering the water inlet cavity 211; the washing liquid is guided from the opening 2143 to the second guide section 2142 of the shower flow passage 212. Preferably, the first flow guiding section 2141 is an arc-shaped structure extending from the inner wall of the spray arm 2 to the water inlet cavity 211, and the arc-shaped structure cooperates with the flow of the washing liquid in the spray chamber 21, so that the resistance to the flow of the washing liquid is reduced, and a good guiding effect is achieved. The first flow guiding sections 2141 are disposed on the inner wall of the spray arm 1, so that the washing liquid can form at least one section of circular track along the arc structure of the flow guiding structure 214. The second flow guiding section 2142 is connected to the first flow guiding section 2141 and extends from the opening 2143 to the distal end of the shower channel 212.

Specifically, the first flow guiding section 2141 is disposed along the water inlet cavity 211 in the spray arm 2 in an unclosed circular or arc shape, at least two sections are disposed in the spray chamber 2, after the washing liquid enters the spray chamber 2 from the water inlet 23, due to the larger impulsive force, the first flow guiding section 2141 reduces the connecting area between the water inlet cavity 211 and the spraying flow passage 212 by spraying around the spraying chamber 2, therefore, most of the washing liquid is intercepted by the first flow guiding section 2141 in the water inlet cavity 211, and follows at least one circle path, the first flow guiding section 2141 can move clockwise or counterclockwise, which is not further limited by this embodiment, since the first flow guiding section 2141 is disposed in an arc shape, the washing liquid cannot pass through the opening 2143 at a high flow rate, when the flow speed of the washing liquid is reduced by the first flow guide portions 2141, the washing liquid may flow into the second flow guide portions 2142 from the openings 2143.

The basin that washing liquid formed at second water conservancy diversion section 2142 is close to intake antrum 211 one side from second water conservancy diversion section 2142 and to keeping away from intake antrum 211 one side, and the crescent can make washing liquid become linear motion's structure from circular motion acceleration for washing liquid can be faster reachs and spray the operating position, has guaranteed the normal use of spray arm 2.

Specifically, when the washing liquid flows to the second flow guide section 2142, the second flow guide section 2142 accelerates the washing liquid while flowing through the second flow guide section 2142 through a gradually increasing watershed channel to obtain a higher flow velocity, and the washing liquid flows to the spray holes 22 formed in the spray arm 2 to realize the spraying operation; the second guide section 2142 is formed to gradually change from a side close to the inlet chamber 211 to a side away from the inlet chamber 211 as the washing liquid flows, and may be formed by forming the second guide section 2142 in an arc shape or inclined.

The water path system is provided with a water inlet water path, a washing water path and a water drainage water path, water flows into the inner container through the water inlet water path, then the washing water path circularly sprays through the water pump 1 and the spraying arm 2, and finally the water drainage water path discharges washing liquid in the inner container 10 after washing is finished. In a washing water path, a water pump 1 is arranged at the bottom of a liner 10, the water pump is arranged at the middle position of the bottom of the liner 10, the middle of the bottom of the liner 10 is low, the periphery of the bottom of the liner is high, washing liquid in the liner is gathered towards the water pump 1, a washing impeller 11 sprays the washing liquid to a spraying chamber 21 of a spraying arm 2, and then the spraying liquid sprays a spraying hole 22 formed in the spraying arm 2 upwards and rotates to wash articles to be washed in the liner 10.

Referring to fig. 4, the water pump 1 has a vertically arranged pump shaft 12, a washing impeller 11 fixed on the upper portion of the pump shaft 12, a drainage impeller 13 fixed on the lower portion of the pump shaft 12, and a driving device 14 for driving the pump shaft 12 to rotate, the water pump 1 drives the washing impeller 11 and the drainage impeller 13 through the pump shaft 12 to respectively provide washing power and drainage power for a washing water path and a drainage water path, the washing pump and a drainage pump are combined into a whole, and meanwhile, the washing function and the drainage function are combined into a whole, so that a water path system of the dishwasher is highly optimized, the water consumption is reduced, excessive accumulated washing water in the pipeline is prevented, and the use efficiency of the washing water is improved.

The driving device 14 rotates forward, and the washing impeller 11 provides washing power for the washing water path; the driving device 14 rotates in the reverse direction, and the discharge impeller 13 supplies discharge power to the discharge water path. When the water pump 1 rotates forwards (the forward rotation of the utility model is not limited to clockwise or anticlockwise rotation, and is recorded as a relative rotation of reverse rotation only), the driving device 14 drives the washing impeller 11 to rotate forwards, so as to send the washing liquid into the spray arm 2, and the spray arm 2 sprays the washing liquid onto the articles to be washed in the inner container 10, thereby realizing the washing of the tableware; when the water pump 1 rotates reversely (the utility model discloses the reversal is not limited to clockwise or anticlockwise rotation, only comes the record as a relative rotation of corotation), drive arrangement 14 drives drainage impeller 13 and reverses, dirty water after finishing to tableware washing in the inner bag 10, through the drain pipe discharge, unite washing pump and drain pump as an organic whole, combine washing function and drainage function into one again simultaneously, make dishwasher water route system obtain high optimization, the water consumption has been reduced, prevent too much accumulation washing liquid in the pipeline, the availability factor of washing liquid has been improved; because washing pump and drain pump unite two into one, make water pump 1 in dish washer, shared space is minimum for dish washer has enlarged the washing capacity under the unchangeable condition of structural dimension, has promoted washing efficiency.

Referring to fig. 6, the washing impeller 11 has a hub 111 fixed to the pump shaft 12 of the water pump 1, and a plurality of first blades 112 provided on an outer circumferential surface of the hub 111 at intervals. The first vane 112 enhances a washing liquid flow and provides a washing power to the washing water path. The first blade 112 includes a first flow guiding section 1121 for guiding the washing liquid toward the axial direction of the washing impeller 11 and guiding the washing liquid upward along the axial direction of the washing impeller 11; a second acceleration section 1122 for accelerating the washing liquid upward in the axial direction of the washing impeller 11, the second acceleration section 1122 being vertically disposed; and a third flow-inducing section 1123 for guiding the washing liquid in the radial direction of the washing impeller 11, the third flow-inducing section 1123 being located in the shower chamber 21. The first blade 112 includes a first flow guiding section 1121, a second accelerating section 1122 and a third flow guiding section 1123 which are sequentially arranged from bottom to top; through the structure that sets up first blade 112, strengthened the flow trend of washing liquid, further promoted the washing efficiency of dish washer for inside washing liquid can flow into spray chamber 21 at washing impeller 11 exit end with a high-speed state, reduced the consumption cost of electric energy, promoted spray system's efficiency.

First drainage section 1121 is the spiral helicine structure of arc, sets up first drainage section 1121 into the spiral helicine structure of arc and makes washing liquid under washing impeller 11's drive, along with washing impeller 11's rotation, better by first blade 112 guide, better next structure section that gets into first blade 112, along with washing impeller 11's rotation, upwards better concentration along its axial direction reaches great lift.

Referring to fig. 9, a water inlet 23 is opened on the lower end surface of the spray arm 2, and the washing impeller 11 extends into the spray chamber 21 through the water inlet 23. The spray arm 2 is formed by hermetically buckling an upper shell and a lower shell, and the lower end face of the lower shell is the lower end face of the spray arm 2, namely the lower end face of the spray arm 2 is lower than the upper end face of the washing impeller 11; the lower end face of the spray arm 2 is directly provided with the water inlet 23, so that a water inlet part extending downwards is saved, the height of the spray arm 2 is favorably reduced, and the manufacturing cost is favorably reduced; meanwhile, when the washing liquid does not leave the washing impeller 11, the washing liquid enters the spraying chamber 21, so that the energy loss of the sprayed water flow is reduced, the washing impeller 11 positioned in the spraying chamber 21 has a large pushing effect on the flow of the water flow in the spraying chamber 21, the strength of the water flow sprayed from the spraying holes 22 is ensured, and the washing cleanliness is improved.

Referring to fig. 5, the water pump 1 is provided with a support cover 15 engaged with the spray arm 2, the washing impeller 11 passes through a through hole 151 of the support cover 15 and protrudes upward, and the support cover 15 is provided with a first engaging portion 152 engaged with the water inlet 23. Specifically, the first fitting portion 152 has a first radial surface 1521 that fits to the lower end surface of the shower arm 2 outside the water inlet 23, and a first axial surface 1522 that extends upward along the inside of the first radial surface 1521. The spray arm 2 is placed directly onto the support cover 15 so that the washing impeller 11 is located within the spray chamber 21, while the water inlet 23 is in contact with the first fitting 152 so that the support cover 15 supports the weight of the spray arm 2; there is no fixed relationship of assembly between the spray arm 2 and the other components. When the washing water path works, the spray arm 2 is in a suspended rotary spraying state, so that the spray arm 2 is not in contact with other parts when spraying, namely the spray arm 2 is supported by water flow sprayed upwards by a water pump, and the spray arm 2 moves upwards slightly to be separated from the support cover 15 and be in a suspended state; the suspended rotary spraying state of the spray arm 2 reduces the friction of the spray arm 2 during rotation, avoids the abrasion of the spray arm 2 during rotation, and is beneficial to the improvement of the speed and the efficiency of the rotary spraying of the spray arm 2; meanwhile, the arrangement of a rotatable part of the spray arm 2 is saved, the height of the spray arm 2 is reduced, a washing water path is shortened, the space occupation of the inner container 10 is reduced, and the installation and manufacturing cost is reduced.

The lower end surface of the spray arm 2 is also provided with a downward convex blocking edge 24, the blocking edge 24 and the water inlet 23 are coaxially arranged, the blocking edge 24 is positioned on the outer side of the water inlet 23, and the supporting cover 15 is provided with a second matching part 153 used for being matched with the blocking edge 24, so that when the spray arm 2 moves upwards and is in a suspension state in the working process of a washing water path, the height of the upward movement of the spray arm 2 is preferably lower than or equal to the height of the first axial surface 1522, the radial superposition of the supporting cover 15 and the water inlet 23 in the radial direction is avoided, the radial gap of the supporting cover 15 and the water inlet 23 in the radial direction is avoided, and the water flow raised by the washing impeller 11 is ensured and all enters.

The upper portion of the hub 111 has a flared section extending upward and outward, the upper end surface of the first blade 112 is in an arc shape extending upward and radially outward, and the inner side of the upper end surface of the first blade 112 is connected to the upper end surface of the hub 111. The inboard of the through-hole 15 on the support cover 15 is equipped with the convex drainage portion 154 that extends in upper and lower direction, and inside bellied arc, and the arc medial surface of drainage portion 154 and first blade 112 outer end are towards matching for the rivers that are kicked up by washing impeller 11 flow upwards along with first blade 112's rotation, and the arc medial surface of drainage portion 154 is flowed through in the outside of the rivers that are kicked up, and arrival that can be more smooth and easy sprays in the cavity 21.

A receiving chamber 16 for receiving the washing liquid is formed below the support cover 15, and the washing liquid in the receiving chamber 16 is sprayed to the spray chamber 21 by the washing impeller 11. The receiving chamber 16 is located at a relatively low position in the inner container 10 so that the sprayed washing water flows back into the receiving chamber 16.

Referring to fig. 10 to 13, in order to realize drainage when the drainage impeller 13 rotates reversely, no drainage is performed when the impeller rotates forwardly; the water pump 1 further comprises a drainage cavity 161, the drainage cavity 161 is communicated with both the drainage water inlet pipe 162 and the drainage water outlet pipe 163, and the drainage impeller 13 is positioned in the drainage cavity 161; a flow blocking structure 171 is fixedly arranged in the radial direction in the drainage chamber 161, and the flow blocking structure 171 is used for guiding the flow direction of the water flow pushed by the drainage impeller 13. Through the flow blocking structure 171 fixedly arranged in the radial direction, when the water flow pushed by the drainage impeller 13 flows, the flow blocking structure 171 blocks the water flow in the radial direction, and the water flow is guided into the drainage water inlet pipe 162 or the drainage water outlet pipe 163; the water flow in the drainage chamber 161 is pushed to rotate forward or backward by the forward or backward rotation of the drainage impeller 13, that is, the water flow impacts the first or second drainage surface of the flow blocking structure 171 and is further guided into the drainage inlet pipe 162 or the drainage outlet pipe 163; because keep off a class structure 171 fixed setting, be favorable to keeping off class structure 171's stability, be favorable to guaranteeing the effect of drainage, avoid appearing the problem that the drainage became invalid.

When the drainage impeller 13 rotates forward (the forward rotation of the present invention is not limited to clockwise or counterclockwise rotation, and is recorded as only one relative rotation of reverse rotation), the drainage impeller 13 pushes the water flow in the drainage chamber 161 to rotate forward, and the water flow in the forward rotation partially reaches the drainage inlet pipe 162, partially impacts on the first flow guiding surface of the flow blocking structure 171, and partially flows through the lower end of the flow blocking structure 171; the partial water flow impacting the flow blocking structure 171 enters the drain inlet pipe 162 under the guidance of the flow blocking structure 171, so that the washing liquid in the drain chamber 161 is partially pushed into the drain inlet pipe 162, and the washing liquid cannot continuously enter the drain chamber 161 through the drain inlet pipe 162; the drainage impeller 13 does not perform a drainage function when it rotates in the normal direction.

When the drainage impeller 13 rotates reversely (the reverse rotation of the present invention is not limited to clockwise or counterclockwise rotation, and is recorded as only one relative rotation of the forward rotation), the drainage impeller 13 pushes the water flow in the drainage chamber 161 to rotate reversely, and the reversed water flow partially reaches the drainage outlet pipe 163, partially impacts on the first flow guiding surface of the flow blocking structure 171, and partially flows through the lower end of the flow blocking structure 171; part of the water flow impacting the flow blocking structure 171 enters the water outlet pipe 163 under the guiding of the flow blocking structure 171, so that the washing liquid in the drainage chamber 161 is partially pushed into the water outlet pipe 163, and at this time, the water inlet pipe 162 continues to convey the washing liquid into the drainage chamber 161; the drainage impeller 13 does not perform a drainage function when it rotates in reverse.

A water inlet communicated with the water inlet pipe 162 and a water outlet communicated with the water outlet pipe 163 are formed on the water discharge chamber 161; preferably, the flow blocking structure 171 is positioned between the water inlet and the water outlet, the water inlet and the water outlet being positioned adjacent to each other, and the flow blocking structure 171 is fixedly positioned within the drain chamber 161. In the drain chamber 161, the water flow pushed by the drain impeller 13 rotates together with the drain impeller 13, and the flow blocking structure 171 is provided in a radial direction so as to block the rotating water flow.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A dishwasher having a suspended spray arm, comprising:

the inner container is used for containing articles to be washed;

2. The dishwasher of claim 1, wherein the spray arm has a spray chamber therein, the wash impeller driving an upward spray of wash liquid into the spray chamber, the upward force imparted by the wash liquid to the spray arm being greater than or equal to the downward gravitational force experienced by the spray arm.

3. The dishwasher of claim 1, wherein the spray arm has a spray chamber therein, the spray chamber has a water inlet cavity located in the middle of the spray arm and a spray runner communicated with the water inlet cavity and provided with spray holes, and the top wall of the water inlet cavity is provided with a positioning part extending downwards and used for rotation of the spray arm.

4. The dishwasher of claim 3, wherein the positioning portion is provided coaxially with the washing impeller, the positioning portion being located above the washing impeller.

5. The dishwasher of claim 4, wherein the positioning portion has a basin shape, the washing impeller has a hub fixed to a pump shaft of the water pump, and a plurality of first blades provided in an axial direction of the hub, and a radial dimension of the hub is larger than a radial dimension of a bottom of the positioning portion.

6. The dishwasher of claim 5, wherein a lower end surface of the positioning part has a bottom surface and an arc-shaped side surface smoothly transitioning with the bottom surface.

7. The dishwasher of claim 6, wherein the upper end surface of the first vane is arcuate extending upwardly and radially outwardly, the upper end surface of the first vane mating with the arcuate side surface of the positioning portion.

8. The dishwasher of any one of claims 3 to 7, wherein a flow guide structure for guiding and buffering the flow of the washing liquid in the spray chamber is provided between the inlet chamber and the spray passage.

9. The dishwasher of claim 8, wherein an opening is provided between the flow guide structure and the inner wall of the spray arm, and the washing liquid is delivered from the inlet chamber to the spray flow passage through the opening.

10. The dishwasher of claim 9, wherein the flow directing structure comprises a first flow directing section for directing the washing liquid along at least one circular path after entering the spray chamber, and a second flow directing section for directing the washing liquid from the opening into the spray channel.