CN110664346A

CN110664346A - Spraying device of dish washing machine

Info

Publication number: CN110664346A
Application number: CN201810708355.4A
Authority: CN
Inventors: 曹魁; 解婷; 杨林
Original assignee: Qingdao Haier Dishwasher Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd
Priority date: 2018-07-02
Filing date: 2018-07-02
Publication date: 2020-01-10

Abstract

The invention discloses a spraying device of a dish washing machine, which comprises a spraying arm; the water inlet pipe is communicated with the spray arm and provides spray inlet water for the spray arm; at least one spray hole arranged on the spray arm for spraying washing liquid; at least one spraying hole is provided with a pressurizing unit for increasing the spraying water pressure; the pressurizing unit realizes the relative positioning and flow guiding with the spraying hole through a positioning structure arranged in the spraying arm and an annular structure which plays a role in flow guiding to the washing liquid; the pressurizing unit is provided with a structure which sprays the washing liquid out from the corresponding spraying holes in a certain taper along at least one section of circumference scattering track. The invention provides a spraying device of a dish washing machine, which has the advantages that the sprayed washing liquid has higher speed and large working area, can generate larger scouring force to residual stains on tableware, ensures the cleaning effect, shortens the cleaning time, saves energy and the like.

Description

Spraying device of dish washing machine

Technical Field

The invention belongs to the field of household appliances, and particularly relates to a spraying device of a dish washing machine.

Background

The dishwasher is a household appliance for automatically washing tableware, along with the continuous improvement of the living standard of people, the application of the dishwasher is more and more extensive, and in order to ensure the market competitiveness of the dishwasher, related technicians all research how to continuously improve the comprehensive performance of the dishwasher. The dish washer is a device for washing tableware by spraying high-pressure washing water through a nozzle, generally comprises a dish washer liner forming a washing chamber, a tableware throwing opening is arranged in front of the liner, a door body is arranged at the tableware throwing opening, and a tableware shelf, a sprayer and the like are arranged in the washing chamber. The dish washer is used for automatically cleaning tableware such as dish, chopsticks, dish, knife and fork, and can be divided into two types of box type and conveying type according to the structure. It reduces the labor intensity for the cooking personnel in dining room, hotel and dining room of office, improves the working efficiency and promotes the cleanness and sanitation. At present, various small dishwashers are on the market, and are gradually entering ordinary households.

The first machine dishwashing patent appeared in 1850 and was owned by Joel Houghton, his utility model being a manual dishwasher. In 1929, the european first electric household dishwasher was manufactured by miller (Miele), germany, but it was of a single shape and not closely related to the overall environment of the household. In 1954, the GE company in America produced the first electric table type dish washer, which not only improves the washing performance, but also improves the volume and the appearance of the whole machine. In asia, the country where dishwasher research was first undertaken is japan, and by the mid-late nineties, microcomputer full-automatic table dishwashers have been developed in japan. Meanwhile, european and american have developed home dishwashers into kitchen appliances with unified image.

The dish-washing machine is slow in development in China and has not been popularized and popular in life of people, the main reason is that the western-style dish-washing machine is not well suitable for Chinese families, the Chinese diet habits are greasy, and many additives exist, while the modern western-style dish-washing machine is only used for fully-closed washing and spraying, and heavy oil on dishes and other tableware of the Chinese families cannot be removed through single washing.

Chinese patent application No. CN201520247322.6 discloses a spray arm assembly of a dishwasher, the spray arm assembly comprising: a water inlet pipe; the spray arm is pivotally connected with the water inlet pipe and provided with a water inlet channel communicated with the water inlet pipe, a spray cavity communicated with the water inlet channel and a spray hole communicated with the spray cavity; the movable impeller is fixedly arranged in the spray arm, and the central axis of the movable impeller is superposed with the rotation axis of the spray arm; and the supercharging stationary impeller is arranged in the water inlet channel and guides water in the water inlet channel to the movable impeller so as to push the movable impeller to drive the spray arm to pivot.

Chinese patent application No. CN201720001646.0 discloses a water tank type dish washer, which comprises a water tank, a dish washing tank and a main control box; the upper end of the dishwashing pool is provided with a pressurized sprayer, and the pressurized sprayer comprises a first electromagnetic valve, a pressurized water pump and at least one pressurized sprayer nozzle; the lower end of the dish washing pool is also provided with a manual water outlet, and the lower end of the manual water outlet is connected to the first pipeline; the lower end of the sink is provided with a plurality of ultrasonic vibrators, and the periphery of the inner wall of the sink is provided with a pressurizing sprayer; install main control box on the sink, main control box includes control button and touch display screen, first solenoid valve, booster pump, second solenoid valve and ultrasonic vibrator all with main control box electric connection.

Although the prior art solves the problem of washing of the dish washer to a certain extent, the prior art still has the defects of incomplete washing, complex use method and difficult operation, and has long time for washing tableware and high power consumption; the direct cleaning area of the spray arm is small, so that the secondary cleaning generated after the water flow collides with the tableware is mainly used for cleaning the tableware with a large area, and the factors such as the water flow scouring force of the secondary cleaning are far smaller than those of the direct cleaning and the like.

Therefore, there is a need to overcome the disadvantages and drawbacks of the prior art and to provide a spraying device for a dishwasher, which has the advantages of spraying a washing liquid at a high speed, having a large working area, generating a high scouring force on the residual stains on the dishes, ensuring a cleaning effect, shortening a cleaning time, saving energy, and the like.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem underlying the present invention is to overcome the disadvantages of the prior art and to provide a dishwasher spray device which overcomes or at least partially solves the above mentioned problems.

In order to solve the technical problems, the invention adopts the technical scheme that: a spray device of a dishwasher comprises

A spray arm;

the water inlet pipe is communicated with the spray arm and provides spray inlet water for the spray arm;

at least one spray hole arranged on the spray arm for spraying washing liquid;

at least one spraying hole is provided with a pressurizing unit for increasing the spraying water pressure;

the pressurizing unit realizes the relative positioning and diversion with the spraying hole through a positioning structure arranged in the spraying arm and an annular structure which plays a role in diversion of the washing liquid.

The pressurizing unit is provided with a structure which sprays the washing liquid along at least one section of circumference scattering track in a certain taper from the corresponding spraying holes, and the tapered spraying breadth effectively increases the working range of the spraying arm and improves the working efficiency of the spraying arm.

Further, the above

The pressurizing unit comprises a water inlet end, a water outlet end and a flow guide structure for communicating the water inlet end with the water outlet end;

the washing liquid flows through the diversion structure from the water inlet end, the flowing speed higher than that of the water inlet end is obtained at the water outlet end, and the spraying speed of the washing liquid is increased, so that the spraying arm can clean residual stubborn dirt on tableware, and the problem of insufficient pressure during secondary cleaning is avoided.

In one embodiment, the cross-sectional area of the flow field of the flow guide structure at the water inlet end of the pressurizing unit is smaller than that of the flow field at the water outlet end of the pressurizing unit, and the difference of the areas of the flow fields enables washing liquid to be effectively accelerated when passing through, so that the spraying speed of the washing liquid during spraying is improved.

Further, the

The flow guide structure is provided with a flow guide surface which is arranged along the axial direction of the pressurizing unit and has a certain inclination angle;

when the washing liquid flows through the diversion structure, under the effect of the diversion surface, the acting force for driving the pressurization unit to rotate is obtained, and the pressurization unit rotates, so that the washing liquid is in a certain taper when the spraying holes are sprayed out, the working range of the spraying arm is effectively enlarged, and the working efficiency of the spraying arm is improved.

In one embodiment, the flow guide surface is an arc surface with an inclination angle along the axial direction of the pressurizing unit, and when the washing liquid flows through the flow guide surface of the flow guide structure, the arc surface can increase the speed of the washing liquid when the washing liquid flows through, and is matched with the rotation of the pressurizing unit, so that the washing liquid obtains a higher initial speed at the water outlet end of the pressurizing unit.

In one embodiment, the flow directing structure divides the wash liquid flowing through the pressurizing unit into at least two streams.

Further, also includes

A first housing and a second housing for forming a spray arm body;

the spraying holes are arranged on the first shell;

in one embodiment, the pressurizing unit is clamped and fixed by the first housing and the second housing.

Further, the

The positioning structure is a columnar structure which is arranged on the second shell and corresponds to the position of the spraying hole;

in one embodiment, the positioning structure passes through the center of the pressurizing unit for defining two translational degrees of freedom of the pressurizing unit in a plane in which the spray arm is located;

in one embodiment, the positioning structure is a positioning pin passing through the center of the pressurizing unit.

Still further, the

The annular structure is a circular ring which is arranged on the second shell and corresponds to the position of the spraying hole;

in one embodiment, the ring-like structure positions the pressurizing unit ring inside for defining two translational degrees of freedom of the pressurizing unit in the plane in which the spray arm is located.

Still further, the

The spray arm is also provided with a spray chamber communicated with the water inlet pipe and the spray holes;

the spraying cavity is provided with a drainage structure which accelerates the washing liquid to flow to the spraying hole from the water inlet pipe, the drainage structure ensures the flowing speed of the washing liquid in the spraying cavity, so that the washing liquid can be kept at a higher flow speed when flowing to the water inlet end of the pressurizing unit, the pressurizing effect of the pressurizing unit on the washing liquid is more obvious, and the spraying arm is favorable for cleaning tableware.

In one embodiment, the water passing section of the spraying chamber at the water inlet pipe towards the farthest spraying hole is gradually reduced.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the detachable pressurizing unit is arranged in the spray arm, so that the washing liquid is sprayed out from the spray holes in a certain taper, and the effective working area of the spray arm is increased;

2. the washing liquid is pressurized by the pressurizing unit, so that the washing force of the washing liquid on the tableware is ensured, and the cleaning degree of the tableware is improved;

3. the pressurizing unit is detachably arranged at any spraying hole on the spraying arm, so that the use convenience is increased, and the user can conveniently and timely detach and clean the pressurizing unit;

4. aiming at the characteristics of the pressurizing unit, a fixing structure combining multiple modes is arranged, so that the position accuracy of the pressurizing unit in the spray arm is enhanced, the washing liquid can accurately flow from the pressurizing unit to the spray hole, and the spray effect is ensured;

5. in order to further ensure the cleaning effect, a flow guide structure for pressurizing the washing liquid is additionally arranged in the pressurizing unit, so that the washing liquid flowing through the pressurizing unit can obtain higher flow rate and wider spraying range at the water outlet end;

6. according to the invention, the arc-shaped flow guide surface is arranged in the flow guide structure of the pressurizing unit, so that the flowing washing liquid can further obtain a high outflow speed under the action of the arc-shaped surface, the cleaning effect is ensured, and the user experience is improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

FIG. 1 is a schematic view of the spray arm and booster unit assembly of the present invention;

FIG. 2 is a schematic cross-sectional view of the spray arm and booster unit of the present invention;

FIG. 3 is an enlarged view of the section A of the spray arm and the pressurizing unit of the present invention;

FIG. 4 is a first schematic illustration of an exploded view of the spray arm and booster unit of the present invention;

FIG. 5 is a schematic view of the spray arm and pressurizing unit of the present invention in exploded view section B;

FIG. 6 is a second schematic illustration of an exploded view of the spray arm and booster unit of the present invention;

FIG. 7 is a schematic view of the spray arm and booster unit of the present invention in exploded view section C;

FIG. 8 is a schematic view of the spray arm of the present invention assembled with a dishwasher;

FIG. 9 is a first schematic axial view of the booster unit of the present invention;

fig. 10 is a second schematic view of the axial side of the pressurizing unit of the present invention.

In the figure: 1. a spray arm; 101. a first housing; 102. a second housing; 2. spraying holes; 3. a pressurizing unit; 4. a flow guide structure; 401. a flow guide surface; 5. a positioning structure; 6. a cyclic structure; 7. a water inlet pipe; 8. a spray chamber; 9. a water inlet end; 10. and (5) a water outlet end.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 mainly shows a spraying state of a spray arm 1 of the present invention, wherein a pressurizing unit 3 is added in the spray arm 11, wherein the pressurizing unit 3 can be arranged in a spray hole 2 at any position on the spray arm 1;

fig. 2 mainly shows a schematic cross-sectional view of the spray arm 1 and the pressurizing unit 3 of the present invention at one of the installation positions, wherein the washing liquid flows in from the water inlet pipe 7, flows to the pressurizing unit 3 along the flow guiding structure 4, is pressurized under the action of the pressurizing unit 3, and is sprayed out from the spray hole 2;

fig. 3 is an enlarged schematic view mainly illustrating the position of the pressurizing unit 3 in fig. 2, and illustrates the installation relationship between the pressurizing unit 3 and the spray arm 1, and the position relationship between the pressurizing unit 3 and the spray holes 2;

fig. 4 mainly shows an embodiment of the present invention, in which the pressurizing unit 3 is positioned with the spray arm 1 under the action of the positioning structure 5, so as to realize the function of pressurizing the washing liquid;

fig. 5 mainly shows the relative position and structure of the pressurizing unit 3 and the positioning structure 5 in fig. 4, which is convenient for those skilled in the art to further understand the embodiment of the present invention;

fig. 6 mainly shows an embodiment of the present invention, the pressurizing unit 3 is positioned and guided by the spray arm 1 under the action of the positioning structure 5 and the annular structure 6, so as to realize the function of pressurizing the washing liquid;

fig. 7 mainly shows the relative position and structure of the pressurizing unit 3 and the positioning structure 5 in fig. 6, which is convenient for those skilled in the art to further understand the embodiment of the present invention;

fig. 8 mainly shows the mounting position of the spray arm 1 of the present invention to a dishwasher, so that those skilled in the art can better understand the spray device of the present invention;

fig. 9 mainly shows a top view structure of the pressurizing unit 3 according to the present invention, so that those skilled in the art can more intuitively understand the arrangement of the pressurizing unit 3 and the arrangement of the flow guiding structure 4 therein;

fig. 10 mainly shows the bottom view of the pressurizing unit 3 according to the present invention, so that a person skilled in the art can better observe the schematic diagram of the flow guiding structure 4 at the water inlet end 9 of the pressurizing unit 3 from the bottom view.

The structure of the spray arm 11 according to the present invention is further described on the basis of fig. 1 to 10, which are described in detail below.

As shown in fig. 1 to 10, a spray device according to the present invention includes a water inlet pipe 7 for supplying a washing liquid, a spray arm 1 communicating with the water inlet pipe 7 for spraying the washing liquid to dishes in a dishwasher; spray holes 2 arranged on the spray arm 1 for spraying the washing liquid; the spray arm 1 has a spray chamber 8 through which the washing liquid flows and which is in fluid communication with the washing liquid; in the existing dishwasher spray device, no matter the directional spray or the rotary spray, the cleaning area of the sprayed washing liquid is smaller than the area of the tableware in the whole dishwasher, so that the tableware outside the cleaning area is mainly cleaned by the secondary cleaning generated after the washing liquid collides with the tableware, and factors such as the scouring strength of the washing liquid of the secondary cleaning are far smaller than those of the direct cleaning, therefore, the longer time of cleaning is needed to ensure the better tableware cleaning effect, so that the washing time of the existing spray arm 1 is long, meanwhile, because the tableware cleaning is mainly the secondary cleaning, in order to ensure the better tableware cleaning effect, the water column sprayed by the existing spray arm 1 is needed to maintain higher water pressure, so that the electric energy needed by the water pump work is higher, the power consumption of the dishwasher equipment is increased, and in order to solve the technical problems, in the invention, at least one pressurizing unit 3 is arranged corresponding to one spray hole 2 in the spray chamber 8, and the pressurizing unit 3 can spray washing liquid out of the spray holes 2 in a certain taper, so that the effective working area of the spray arm 1 is increased, and meanwhile, the pressurizing unit 3 pressurizes the washing liquid, thereby ensuring the washing force of the washing liquid on tableware and improving the cleaning degree of the tableware.

The following describes a specific embodiment to which the pressurizing unit 3 of the present invention is applied.

Example one

As shown in fig. 1 to 3, the spray device of the dishwasher according to the present embodiment includes a water inlet pipe 7 for supplying a washing liquid, a spray arm 1 communicating with the water inlet pipe 7 for spraying the washing liquid to dishes in the dishwasher; spray holes 2 arranged on the spray arm 1 for spraying the washing liquid; the spray arm 1 is provided with a spray chamber 8 which is flowed through by washing liquid and is communicated with the washing liquid, and a pressurizing unit 3 which is at least arranged corresponding to one spray hole 2 is arranged in the spray chamber 8, in practical application, the pressurizing unit 3 can be arranged at one spray hole 2, and can also be arranged at the positions of a plurality of spray holes 2 according to requirements, so as to ensure the comprehensive and high-efficiency cleaning of tableware, in the spray arm 1 of the existing dish-washing machine, a spray arm 1 with a water column which is sprayed in a multi-hole oriented mode is adopted, the direct cleaning area is a plurality of concentric rings along with the rotation of the spray arm 1, the area of the concentric rings is smaller than the area of the tableware in the whole dish-washing machine, but the pressurizing unit 3 of the invention can just pressurize the washing liquid passing through the interior of the spray arm 1, so that the washing liquid is at a higher pressure when passing through the spray holes 2, so that the water jet ejected from the spray arm 1 is ejected around with a certain taper, not a directed water column.

In addition, the direct cleaning area of the spray arm 1 of the existing dish-washing machine is smaller, so that the tableware cleaning of a larger area is mainly the secondary cleaning generated after water flow collides with the tableware, and factors such as the water flow scouring force of the secondary cleaning are far smaller than those of the direct cleaning, so that the washing time of the existing spray arm 1 is long and the waste of water resources and electric energy is caused in order to ensure a better tableware cleaning effect, and the supercharging unit 3 can realize the effective cleaning of the tableware under the condition that the washing liquid is in a high-pressure state, scour the stubborn stains remained on the tableware in one-time spraying, and realize the function of high-efficiency cleaning.

Example two

As shown in fig. 1 to fig. 3, the present embodiment is further limited to the first embodiment, the washing liquid described in the present embodiment flows into the spraying chamber 8 through the water inlet pipe 7, flows along the flow field formed by the spraying chamber 8, and is sprayed out from the spraying hole 2 installed with the pressurizing unit 3 in a scattering shape with a certain taper, and the spraying breadth of the taper effectively increases the working range of the spraying arm 1, and improves the working efficiency of the spraying arm 1.

EXAMPLE III

As shown in fig. 1 to 10, the present embodiment is further limited to any one of the first embodiment or the second embodiment, the pressurizing unit 3 of the present embodiment is disposed in one spraying hole 2 or more than one spraying hole 2 of the spraying arm 1, and those skilled in the art and users can select the pressurizing unit according to the actual use situation, and the body of the pressurizing unit 3 includes a water inlet end 9, a water outlet end 10, and a flow guiding structure 4 communicating the water inlet end 9 and the water outlet end 10, the washing liquid flows through the flow guiding structure 4 from the water inlet end 9, the flow speed at the water outlet end 10 is higher than that at the water inlet end 9, the spraying speed of the washing liquid is increased, so that the spraying arm 1 can thoroughly clean stubborn dirt remained on the dishes, and the problem of insufficient pressure during the secondary cleaning is avoided, specifically, the washing liquid flows in from the water inlet end 9 of the pressurizing unit 3, the pressurization is carried out through the flow guide structure 4, the pressurization mode can be realized through the reducing of a washing liquid basin or the flow direction guide acceleration, the reducing can be realized at the water inlet end 9, and can also be realized at the water outlet end 10.

Example four

As shown in fig. 9 and 10, this embodiment is further limited to any one of the first to third embodiments, the cross-sectional area of the flow guiding structure 4 in the water inlet end 9 of the pressurizing unit 3 is smaller than the cross-sectional area of the flow field in the water outlet end 10 of the pressurizing unit 3, specifically, when the washing liquid flows through the water inlet end 9 of the pressurizing unit 3, the flow field channel is reduced, the washing liquid is squeezed and passes through the reduced flow field channel at high speed, so as to accelerate the washing liquid, and since the flow field area of the water outlet end 10 is larger than the flow field area of the water inlet end 9, the spraying width of the washing liquid at the water outlet end 10 is enlarged, so as to expand the cleaning range of the spray arm 1, and the difference in flow field area allows the washing liquid to be effectively accelerated when passing through, so as to increase the spraying speed of the washing liquid during spraying.

EXAMPLE five

As shown in fig. 9 and 10, the present embodiment is further limited to any one of the first to fourth embodiments, in the present embodiment, the flow guiding structure 4 is provided with a flow guiding surface 401 having a certain inclination angle along the axial direction of the pressurizing unit 3, specifically, the flow guiding surface 401 guides the washing liquid flowing through the flow guiding structure 4 from the water inlet end 9 to the water outlet end 10 of the pressurizing unit 3, and simultaneously the washing liquid is ejected out of the spraying holes 2 in a tapered shape, so as to increase the effective working area of the spraying arm 1, when the washing liquid flows through the flow guiding structure 4, under the action of the flow guiding surface 401, an acting force for driving the pressurizing unit 3 to rotate is obtained, and the pressurizing unit 3 rotates, so that the washing liquid is in a tapered shape when the spraying holes 2 are ejected, thereby effectively increasing the working range of the spraying arm 1, and improving the working efficiency of the spraying arm 1.

EXAMPLE six

As shown in fig. 9 and 10, the present embodiment is further limited to the fifth embodiment, in the present embodiment, the diversion surface 401 is an arc-shaped surface having an inclined angle along the axial direction of the pressure unit 3, no matter whether the diversion surface 401 is a concave arc or a convex arc disposed on the diversion structure 4, the diversion surface can enable the flowing washing liquid to obtain a higher flowing speed, and at the same time, the flow direction of the washing liquid is guided, when the washing liquid flows through the diversion surface 401 of the diversion structure 4, the arc-shaped surface can increase the speed of the washing liquid when the washing liquid flows through, and cooperate with the rotation of the pressure unit 3, so that the washing liquid obtains a higher initial speed at the water outlet end 10 of the pressure unit 3.

EXAMPLE seven

As shown in fig. 9 and 10, in this embodiment, the washing liquid flowing through the pressurizing unit 3 is divided into at least two water flows by the flow guide structure 4, and the water inlet of the washing liquid is divided into at least two parts at the water inlet end 9 of the pressurizing unit 3, so that the washing liquid can obtain a higher flow velocity when flowing through the water inlet end 9 of the pressurizing unit 3, which is convenient for the acceleration of the washing liquid by the subsequent flow guide structure 4, further enhances the spraying pressure of the washing liquid, improves the cleaning effect of the spraying device, and ensures the cleaning force of the washing liquid on the dishes and improves the cleaning degree of the dishes by pressurizing the washing liquid by the pressurizing unit 3.

Example eight

As shown in fig. 4 to 7, the present embodiment is further defined by any one of the first to seventh embodiments, and the spray device of the present embodiment includes a first housing 101 and a second housing 102 for forming a main body of the spray arm 1, wherein the spray holes 2 are disposed on the first housing 101, and the pressurizing unit 3 is clamped and fixed by the first housing 101 and the second housing 102, in use, a user can detach the spray arm 1, and place the pressurizing unit 3 in the corresponding spray hole 2 according to actual needs, so that flexibility of the pressurizing unit 3 in use is improved, and the first housing 101 and the second housing 102 of the spray arm 1 are connected by snapping or screwing, which facilitates detachment of the user.

Example nine

As shown in fig. 4 to 7, this embodiment is further limited to any one of the first to eighth embodiments, the spray arm 1 of this embodiment includes a positioning structure 5 for positioning the pressurizing unit 3, the positioning structure 5 is a cylindrical structure disposed on the second housing 102 corresponding to the position of the spray hole 2, the positioning structure 5 passes through the center of the pressurizing unit 3 for defining two degrees of freedom of translation of the pressurizing unit 3 in the plane of the spray arm 1, the pressurizing unit 3 rotates under the action of the washing liquid, so that the spray width of the sprayed washing liquid can be wider, and the positioning structure 5 can pass through the center of the pressurizing unit 3 to function as a rotating shaft, in the practical structure, for better fixing the pressurizing unit 3, the positioning structure 5 can be stepped, or inside the corresponding spray hole 2, the step-shaped structure is arranged, so that the vertical movement freedom of the pressurizing unit 3 is well limited while the pressurizing unit rotates around the positioning structure 5.

Example ten

As shown in fig. 4 to 7, the present embodiment is further defined by the ninth embodiment, and the positioning structure 5 of the present embodiment is a positioning pin passing through the center of the pressurizing unit 3.

EXAMPLE eleven

As shown in fig. 4 to 7, this embodiment is further defined by any one of the first to tenth embodiments, in which the spray arm 1 of this embodiment includes a ring-shaped structure 6 for guiding the washing liquid flowing through the pressurizing unit 3, the ring-shaped structure 6 is a circular ring disposed on the second housing 102 at a position corresponding to the spray hole 2, the ring-shaped structure 6 positions the pressurizing unit 3 inside to define two degrees of freedom of translation of the pressurizing unit 3 in a plane in which the spray arm 1 is located, the ring-shaped structure 6 is provided with an opening through which the washing liquid flows, and when the washing liquid flows through the ring-shaped structure 6, since the opening is smaller than the flow field of the spray chamber 8, the washing liquid is accelerated when flowing through the opening, and further, the washing liquid flowing through the water inlet 9 of the pressurizing unit 3 can obtain a higher flow rate.

Example twelve

As shown in fig. 1 to 7, the present embodiment is further defined by any one of the first to eleventh embodiments, in which the spraying chamber 8 has a flow guiding structure for accelerating the flow of the washing liquid from the water inlet pipe 7 to the spraying holes 2, and the flow guiding structure ensures the flow speed of the washing liquid in the spraying chamber 8, so that the washing liquid can be kept at a higher flow speed when flowing to the water inlet end 9 of the pressurizing unit 3, so that the pressurizing effect of the pressurizing unit 3 on the washing liquid is more obvious, and the spraying arm 1 is beneficial to cleaning the dishes.

EXAMPLE thirteen

As shown in fig. 1 to 7, this embodiment is a further limitation of the twelfth embodiment, and the cross-sectional area of the flow field of the spraying chamber 8 at the water inlet pipe 7 is larger than that of the flow field of the spraying chamber 8 at any position.

EXAMPLE thirteen

As shown in fig. 8, the dishwasher according to the present embodiment includes the spraying device of the dishwasher according to any one of the first to twelfth embodiments, the spraying device of the present embodiment is rotatably disposed at the bottom of the water tank, the washing liquid flows through the spraying device to spray and wash the dishes disposed in the water tank, the spraying arm 1 is provided with the pressurizing unit 3 corresponding to the spraying hole 2, and the sprayed washing liquid is in a high-pressure cone shape.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A spray device of a dishwasher comprises

A spray arm (1);

the water inlet pipe (7) is communicated with the spray arm (1) and provides spray inlet water for the spray arm (1);

at least one spray hole (2) arranged on the spray arm (1) and used for spraying washing liquid;

the method is characterized in that: at least one spraying hole (2) is provided with a pressurizing unit (3) for increasing the spraying water pressure;

the pressurizing unit (3) realizes the relative positioning and flow guiding with the spraying holes (2) through a positioning structure (5) arranged in the spraying arm (1) and an annular structure (6) which plays a role in flow guiding for the washing liquid.

2. The spray device of a dishwasher according to claim 1, wherein: the pressurizing unit (3) is provided with a structure which sprays the washing liquid out from the corresponding spraying holes (2) along at least one section of circumference scattering track in a certain taper.

3. The spray device of a dishwasher according to claim 2, wherein: the above-mentioned

The pressurizing unit (3) comprises a water inlet end, a water outlet end and a flow guide structure (4) for communicating the water inlet end with the water outlet end;

the washing liquid flows through the flow guide structure (4) from the water inlet end, and the flow speed of the washing liquid at the water outlet end is higher than that of the washing liquid at the water inlet end.

4. The spray device of a dishwasher according to claim 3, wherein: the cross section area of the flow guiding structure (4) at the water inlet end of the pressurizing unit (3) is smaller than that of the flow area at the water outlet end of the pressurizing unit (3).

5. The spray device of a dishwasher according to claim 3, wherein: the above-mentioned

The flow guide structure (4) is provided with a flow guide surface with a certain inclination angle along the axial direction of the pressurizing unit (3);

when the washing liquid flows through the flow guide structure (4), the acting force for driving the pressurizing unit (3) to rotate is obtained under the action of the flow guide surface;

preferably, the flow guide surface is an arc surface with an inclined angle along the axial direction of the pressurizing unit (3).

6. A dishwasher spray unit according to any one of claims 3 to 5, wherein: the flow guide structure (4) divides the washing liquid flowing through the pressurizing unit (3) into at least two water flows.

7. The spray device of a dishwasher according to any one of claims 1 to 7, wherein: also comprises

A first housing (101) and a second housing (102) for forming a main body of the spray arm (1);

the spraying holes (2) are arranged on the first shell (101);

preferably, the pressurizing unit (3) is clamped and fixed by the first housing (101) and the second housing (102).

8. The spray device of a dishwasher according to claim 7, wherein: the above-mentioned

The positioning structure (5) is a columnar structure which corresponds to the position of the spraying hole (2) and is arranged on the second shell (102);

preferably, the positioning structure (5) passes through the center of the pressurizing unit (3) for defining two translational degrees of freedom of the pressurizing unit (3) in the plane in which the spray arm (1) is located;

more preferably, the positioning structure (5) is a positioning pin passing through the center of the pressurizing unit (3).

9. The spray device of a dishwasher according to claim 7, wherein: the above-mentioned

The annular structure (6) is a circular ring which is arranged on the second shell (102) and corresponds to the position of the spraying hole (2);

preferably, the ring-like structure (6) places the pressurizing unit (3) ring-inside for defining two translational degrees of freedom of the pressurizing unit (3) in the plane in which the spray arm (1) is located.

10. The spray device of a dishwasher according to claim 1, wherein: the above-mentioned

The spray arm (1) is also provided with a spray chamber (8) which is communicated with the water inlet pipe (7) and the spray holes (2);

the spraying chamber (8) is provided with a drainage structure which accelerates the washing liquid to flow to the spraying holes (2) from the water inlet pipe (7);

preferably, the water passage section of the spray chamber (8) at the water inlet pipe (7) to the farthest spray hole (2) is gradually reduced.