CN110664347A - Spraying device of dish washing machine - Google Patents

Abstract

The invention discloses a spray device for a dishwasher, comprising a spray arm; a water inlet pipe, which is communicated with the spray arm and provides spray water for the spray arm; at least one spray hole is arranged on the spray arm , used for spraying washing liquid; at least one spray hole is provided with a booster unit for increasing the spray water pressure; the booster unit is positioned relative to the spray hole through a positioning structure arranged in the spray arm; the The pressurizing unit is configured with a structure in which the washing liquid is sprayed out from the corresponding spray holes in a certain taper along a track scattered along at least a section of the circumference. The invention provides a spray device for a dishwasher, the device has the advantages of high speed of sprayed washing liquid and large working area, which can produce a greater scouring force for the stains remaining on the tableware and ensure the cleaning effect. At the same time, it has the advantages of shortening cleaning time and saving energy.

Description

A spray device for a dishwasher

technical field

The invention belongs to the field of household appliances, in particular to a spray device of a dishwasher.

Background technique

Dishwashers are household appliances used to automatically wash tableware. With the continuous improvement of people's living standards, the application of dishwashers has become more and more extensive. In order to ensure the market competitiveness of dishwashers, relevant technical personnel are in Research how to continuously improve the overall performance of the dishwasher. Dishwasher is a device that uses nozzles to spray high-pressure washing water to clean tableware. Dishwashers generally include a dishwasher liner that forms a cleaning chamber. There is a tableware input port in front of the inner tank, and a door is provided at the tableware input port. , There are tableware racks, showers, etc. in the washing room. Dishwasher is a device used to automatically clean bowls, chopsticks, plates, dishes, knives, forks and other tableware. According to the structure, it can be divided into two categories: box type and conveyor type. It reduces labor intensity, improves work efficiency, and improves cleanliness for cooks in restaurants, hotels, and canteens of government agencies. Now, a variety of small dishwashers have been listed and are gradually entering ordinary households.

The first patent for machine dishwashing appeared in 1850, owned by Joel Houghton, whose utility model was a manual dishwasher. In 1929, the German company Miele produced the first electric household dishwasher in Europe, but it had a single shape and was not closely related to the overall home environment. In 1954, GE Company of the United States produced the first electric desktop dishwasher, which not only improved the washing performance, but also improved the size and shape of the whole machine. In Asia, Japan was the first country to engage in dishwasher research. By the mid-to-late 1990s, Japan had developed a microcomputer fully automatic desktop dishwasher. At the same time, Europe and the United States have developed household dishwashers into kitchen appliances with a unified image.

The development of dishwashers in China is slow, and it has not been popularized and popular in people's lives. The main reason is that Western-style dishwashers are not very suitable for Chinese families. Chinese people's eating habits are greasy and there are many add-ons. , while modern western-style dishwashers are only fully enclosed washing sprays, and heavy oil cannot be removed from Chinese household dishes and other tableware through a single rinse.

The Chinese patent with the application number CN201520247322.6 discloses a spray arm assembly of a dishwasher, the spray arm assembly includes: a water inlet pipe; a spray arm, the spray arm is pivotally connected to the water inlet pipe, so The spray arm is 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; a moving impeller, the moving impeller is fixed on the spray chamber. inside the arm and the central axis of the moving impeller coincides with the rotation axis of the spray arm; a pressurized static impeller, which is arranged in the water inlet channel and guides the water in the water inlet channel The movable impeller drives the movable impeller to pivot the spray arm.

The Chinese patent with application number CN201720001646.0 discloses a sink-type dishwasher, including a sink, a sink and a main control box; a booster sprayer is installed on the upper end of the sink, and the booster spray The device includes a first solenoid valve, a booster water pump and at least one booster sprinkler nozzle; the lower end of the sink is also provided with a manual water outlet, and the lower end of the manual outlet is connected to the first pipeline; the lower end of the sink is provided with multiple There are ultrasonic vibrators, and pressurized sprayers are installed around the inner wall of the sink; a main control box is installed on the sink, and the main control box includes control buttons and a touch display screen. The first solenoid valve, the pressure booster The water pump, the second solenoid valve and the ultrasonic oscillator are all electrically connected with the main control box.

Although the above-mentioned prior art solves the problem of dishwasher cleaning to a certain extent, it still suffers from the shortcomings of insufficient cleaning, complicated use method, difficult operation, long time for washing dishes and high power consumption; the direct cleaning area of the spray arm Small, so that the larger area of tableware cleaning is mainly caused by the secondary cleaning after the collision of the water flow with the tableware, and the factors such as the scouring force of the water flow in the secondary cleaning are far less than the problems of direct cleaning.

Therefore, it is necessary to improve the deficiencies and defects of the prior art, and to provide a spray device for a dishwasher, which has a high speed of sprayed washing liquid and a large working area, which can clean the stains left on the tableware. It produces greater scouring force, ensures the cleaning effect, and at the same time shortens the cleaning time and saves energy.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a spray device for a dishwasher that can overcome the above problems or at least partially solve the above problems.

In order to solve the above-mentioned technical problems, the basic concept of the technical solution adopted in the present invention is: a spray device for a dishwasher, comprising:

spray arm;

The water inlet pipe is connected with the spray arm to provide spray water for the spray arm;

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

At least one spray hole is provided with a booster unit for increasing the spray water pressure;

The pressurizing unit is positioned relative to the spray hole through the positioning structure arranged in the spray arm.

The pressurizing unit is configured with a structure in which the washing liquid is sprayed with a certain taper from the corresponding spray holes in a trajectory scattered along at least a section of the circumference, and the tapered spray width effectively increases the spray rate. The working range of the spray arm improves the working efficiency of the spray arm.

Furthermore, the

The booster unit includes a water inlet end, a water outlet end, and a diversion structure connecting the water inlet end and the water outlet end;

The washing liquid flows from the water inlet end through the diversion structure, and the flow velocity at the water outlet end is higher than that of the water inlet end, and the jetting velocity of the washing liquid is increased, so that the spray arm can clean the stubborn dirt remaining on the tableware, avoiding the need for The problem of insufficient pressure during secondary cleaning.

In one embodiment, the cross-sectional area of the flow guide structure at the water inlet end of the booster unit is smaller than the cross-sectional area of the flow area at the water outlet end of the booster unit. The spray velocity of the liquid as it is sprayed.

Further, the

The diversion structure is provided with a diversion surface with a certain inclination angle along the axial direction of the supercharging unit;

When the washing liquid flows through the diversion structure, under the action of the diversion surface, the force that drives the rotation of the booster unit is obtained, and the rotation of the booster unit makes the washing liquid have a certain taper when it is sprayed out of the spray hole, which is effective. The working range of the spray arm is enlarged, and the working efficiency of the spray arm is improved.

In one embodiment, the guide surface is an arc-shaped surface with an inclined angle along the axial direction of the booster unit. When the washing liquid flows through the guide surface of the guide structure, the arc-shaped surface can increase the washing liquid. The speed at the time of flow is matched with the rotation of the pressurizing unit, so that the washing liquid obtains a higher initial speed at the water outlet of the pressurizing unit.

In one embodiment, the diversion structure divides the washing liquid flowing through the booster unit into at least two water flows.

Further, it also includes

a first housing and a second housing for forming the main body of the spray arm;

The spray hole is arranged on the first shell;

In one embodiment, the booster unit is clamped and fixed by the first casing and the second casing.

Further, the said

The positioning structure is a columnar structure arranged on the second casing corresponding to the position of the spray hole;

In one embodiment, the positioning structure passes through the center of the booster unit, and is used to define two translational degrees of freedom of the booster unit in the plane where the spray arm is located;

In one embodiment, the positioning structure is a positioning pin passing through the center of the booster unit.

Still further, the

The spray arm also has a spray chamber connected with the water inlet pipe and the spray hole;

The spray chamber has a drainage structure that accelerates the flow of the washing liquid to the spray hole from the water inlet pipe. At the end, the flow rate can be kept at a relatively high speed, so that the pressurizing effect of the pressurizing unit on the washing liquid is more obvious, which is beneficial to the washing of the dishes by the spray arm.

In one embodiment, the water passage section of the spray chamber at the water inlet pipe becomes gradually smaller toward the farthest spray hole.

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

1. In the present invention, a detachable pressurization unit is arranged in the spray arm, so that the washing liquid is sprayed from the spray hole with a certain taper, which increases the effective working area of the spray arm;

2. The pressurization of the washing liquid by the pressurizing unit ensures the cleaning strength of the washing liquid on the tableware and improves the cleaning degree of the tableware;

3. The booster unit can be detachably installed at any spray hole on the spray arm, which increases the convenience of use and facilitates users to disassemble and clean in time;

4. According to the characteristics of the booster unit, a fixed structure combining various methods is set up, which enhances the positional accuracy of the booster unit in the spray arm, and also ensures that the washing liquid can accurately flow from the booster unit to the sprayer. At the shower hole, the effect of the spray is guaranteed;

5. In order to further ensure the cleaning effect, a diversion structure for pressurizing the washing liquid is added in the booster unit, so that the washing liquid flowing through the booster unit can obtain a higher flow rate and a wider spray range at the water outlet. ;

6. In the present invention, an arc-shaped guide surface is arranged in the guide structure of the pressurized unit, so that the washing liquid flowing through can further obtain a higher outflow speed under the action of the arc-shaped surface, ensuring the cleaning effect. effect, improving the user experience.

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

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

In the attached image:

Fig. 1 is the assembly schematic diagram of spray arm and pressurization unit of the present invention;

Fig. 2 is the cross-sectional schematic diagram of the spray arm and the pressurizing unit of the present invention;

3 is an enlarged schematic view of the section A of the spray arm and the booster unit of the present invention;

Fig. 4 is the first schematic diagram of the exploded view of the spray arm and the booster unit of the present invention;

5 is a schematic diagram of part B of the exploded view of the spray arm and the booster unit of the present invention;

6 is the second schematic diagram of the exploded view of the spray arm and the booster unit of the present invention;

7 is a schematic diagram of the exploded view of the spray arm and the booster unit C of the present invention;

8 is a schematic diagram of the assembly of the spray arm and the dishwasher of the present invention;

Fig. 9 is the first schematic diagram of the axial side of the supercharging unit of the present invention;

FIG. 10 is a second schematic diagram of the shaft side of the supercharging unit of the present invention.

In the figure: 1, spray arm; 101, first shell; 102, second shell; 2, spray hole; 3, booster unit; 4, diversion structure; 401, diversion surface; 5, positioning structure; 6, annular structure; 7, water inlet pipe; 8, spray chamber; 9, water inlet end; 10, water outlet end.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, 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 to illustrate the present invention , but 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. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

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

2 mainly shows a schematic cross-sectional view of the spray arm 1 and the booster unit 3 of the present invention in one of the installation positions. The washing liquid flows in from the water inlet pipe 7, and flows to the booster unit 3 along the guide structure 4. At the booster unit 3 Under the action of the pressure, the pressure is realized, and it is sprayed from the spray hole 2;

FIG. 3 mainly shows an enlarged schematic view of the position of the booster unit 3 in FIG. 2, showing the installation relationship between the booster unit 3 and the spray arm 1, and the positional relationship with the spray hole 2;

FIG. 4 mainly shows an embodiment of the present invention, the pressurizing unit 3 is positioned with the spray arm 1 under the action of the positioning structure 5, thereby realizing the function of pressurizing the washing liquid;

FIG. 5 mainly shows the relative positional relationship and structure of the booster unit 3 and the positioning structure 5 in FIG. 4 , so that those skilled in the art can further understand the embodiments of the present invention;

FIG. 6 mainly shows an embodiment of the present invention. The pressurizing unit 3 realizes the positioning and diversion of the spray arm 1 under the action of the positioning structure 5 and the annular structure 6, thereby realizing the function of pressurizing the washing liquid;

FIG. 7 mainly shows the relative positional relationship and structure of the booster unit 3 and the positioning structure 5 in FIG. 6 , so that those skilled in the art can further understand the embodiments of the present invention;

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

FIG. 9 mainly shows the top view structure of the supercharging unit 3 according to the present invention, so that those skilled in the art can more intuitively understand the arrangement of the supercharging unit 3 and the arrangement of the diversion structure 4 therein;

10 mainly shows the bottom view structure of the booster unit 3 according to the present invention, so that those skilled in the art can better observe the schematic diagram of the diversion structure 4 at the water inlet end 9 of the booster unit 3 from a bottom view perspective.

On the basis of the above-mentioned FIGS. 1 to 10 , the structure of the spray arm 11 according to the present invention will be further described, and the details are as follows.

As shown in FIGS. 1 to 10 , a spray device according to the present invention includes a water inlet pipe 7 for supplying washing liquid, which is communicated with the water inlet pipe 7 and sprays the washing liquid to the dishes in the dishwasher. arm 1; a spray hole 2 arranged on the spray arm 1 for spraying washing liquid; the spray arm 1 has a spray chamber 8 through which the washing liquid flows and is in fluid communication with the washing liquid; In some dishwasher spray devices, whether it is a directional spray or a rotary spray, the cleaning area of the sprayed washing liquid is smaller than the area where the tableware is placed in the entire dishwasher, which makes the cleaning area smaller than the cleaning area. The main cleaning of the tableware outside is mainly based on the secondary cleaning after the collision between the washing liquid and the tableware, and the flushing force of the washing liquid in the secondary cleaning is far less than the direct cleaning. Therefore, in order to ensure better tableware The washing effect requires a long time of cleaning, resulting in a long washing time of the existing spray arm 1. At the same time, since the tableware cleaning is mainly secondary cleaning, in order to ensure a better tableware washing effect, the existing spray arm 1 needs to be sprayed. In order to solve the above-mentioned technical problems, the present invention in the spray chamber 8 corresponds to at least one spray The shower hole 2 is provided with a pressurizing unit 3. The setting of the pressurizing unit 3 can make the washing liquid spray out from the spray hole 2 with a certain taper, which increases the effective working area of the spray arm 1. At the same time, through the pressurization The pressurization of the washing liquid by the unit 3 ensures the cleaning strength of the washing liquid on the tableware and improves the cleaning degree of the tableware.

The specific examples in which the supercharging unit 3 according to the present invention is applied are as follows.

Example 1

As shown in FIGS. 1 to 3 , a spray device for a dishwasher according to this embodiment includes a water inlet pipe 7 for supplying washing liquid, which is communicated with the water inlet pipe 7 and sprays the dishes in the dishwasher. A spray arm 1 for washing liquid; a spray hole 2 arranged on the spray arm 1 for spraying the washing liquid; the spray arm 1 has a spray cavity through which the washing liquid flows and is in fluid communication with the washing liquid Chamber 8, in the spray chamber 8, at least one of the pressurization units 3 set in the spray hole 2, in practical applications, the pressurization unit 3 can be set at one of the spray holes 2, or according to needs Multiple spray holes 2 are set at positions to ensure comprehensive and efficient cleaning of tableware. In the existing dishwasher spray arms 1, the spray arms 1 with porous directional spray water columns are mostly used. 1 Rotation makes the direct cleaning area a plurality of concentric rings, and the area of the concentric rings is smaller than the tableware placement area in the entire dishwasher, and the booster unit 3 of the present invention can just pass the spray arm. The washing liquid inside 1 is pressurized, so that the washing liquid is at a higher pressure when passing through the spray hole 2, so that the water flow sprayed from the spray arm 1 is sprayed around with a certain taper instead of a directional water column.

In addition, the direct cleaning area of the spray arm 1 of the existing dishwasher is small, so that the larger area of tableware cleaning is mainly caused by the secondary cleaning generated after the water flow collides with the tableware, while the secondary cleaning water flow Factors such as flushing force are far less than direct cleaning, so in order to ensure a better dishwashing effect, a longer period of cleaning is required, resulting in a long washing time for the existing spray arm 1 and a waste of water resources and electrical energy at the same time. The pressurizing unit 3 can effectively clean the tableware when the washing liquid is under high pressure. In one spray, the stubborn stains remaining on the tableware are washed away to achieve the function of efficient cleaning.

Embodiment 2

As shown in FIGS. 1 to 3 , this embodiment is a further limitation of the above-mentioned first embodiment. The washing liquid described in this embodiment flows into the spray chamber 8 through the water inlet pipe 7 , and flows along the flow area formed by the spray chamber 8 . The flow is scattered from the spray hole 2 where the booster unit 3 is installed, and sprays out with a certain taper. The tapered spray width effectively increases the working range of the spray arm 1 and improves the spray arm 1. work efficiency.

Embodiment 3

As shown in FIG. 1 to FIG. 10 , this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 or Embodiment 2. The booster unit 3 described in this embodiment is disposed on one of the spray arms 1 . In the spray hole 2 or more than one spray hole 2, the skilled and technical personnel and users can choose according to the actual situation in use, and the body of the booster unit 3 includes a water inlet end 9, a water outlet end 10 and a water inlet. The diversion structure 4 at the end 9 and the water outlet end 10, the washing liquid flow flows through the diversion structure 4 from the water inlet end 9, and the flow velocity at the water outlet end 10 is higher than that of the water inlet end 9, and the jetting speed of the washing liquid is increased, The spray arm 1 can thoroughly clean the stubborn dirt remaining on the tableware, avoiding the problem of insufficient pressure during the secondary cleaning. The flow structure 4 is pressurized, and the pressurization method can be realized by changing the diameter of the washing liquid flow area or accelerating the drainage of the flow direction.

Embodiment 4

As shown in FIG. 9 and FIG. 10 , this embodiment is a further limitation of any of the above-mentioned embodiments from the first embodiment to the third embodiment. The cross-sectional area of the watershed is smaller than the cross-sectional area of the watershed at the water outlet end 10 of the booster unit 3. Specifically, when the washing liquid flows through the water inlet end 9 of the booster unit 3, its watershed channel is reduced, and the washing liquid is squeezed. The high-speed passage in the narrowed watershed channel realizes the acceleration of the washing liquid. At the same time, because the watershed area of the water outlet 10 is larger than the watershed area of the water inlet 9, the spray width of the washing liquid at the water outlet 10 is enlarged, realizing the spraying The expansion of the cleaning range of the shower arm 1 and the difference in the area of the water area allow the washing liquid to be effectively accelerated when passing through, thereby increasing the spraying speed of the washing liquid during spraying.

Embodiment 5

As shown in FIG. 9 and FIG. 10 , this embodiment is a further limitation of any of the above-mentioned embodiments from the first embodiment to the fourth embodiment. The guide surface 401 with a certain inclination angle, specifically, the guide surface 401 guides the washing liquid flowing through the guide structure 4 from the water inlet end 9 of the booster unit 3 to the water outlet end 10, and at the same time makes the washing liquid conical. The spray hole 2 is sprayed out in the shape of a spray hole 2, which increases the effective working area of the spray arm 1. When the washing liquid flows through the guide structure 4, under the action of the guide surface 401, the force that drives the pressurization unit 3 to rotate is obtained. The rotation of the booster unit 3 makes the washing liquid have a certain taper when sprayed from the spray hole 2 , which effectively increases the working range of the spray arm 1 and improves the working efficiency of the spray arm 1 .

Embodiment 6

As shown in FIG. 9 and FIG. 10 , this embodiment is a further limitation of the fifth embodiment. The flow guide surface 401 in this embodiment is an arc-shaped surface with an inclined angle along the axial direction of the supercharging unit 3 . Whether the guide surface 401 is a concave arc or a convex arc arranged on the guide structure 4 can make the washing liquid flowing through obtain a higher flow speed, and at the same time guide the flow direction of the washing liquid, and the washing liquid flows through the guide structure. When the guide surface 401 of 4 is formed, the arc surface can increase the speed of the washing liquid when it flows, and cooperate with the rotation of the pressurizing unit 3, so that the washing liquid can obtain a higher initial speed at the water outlet 10 of the pressurizing unit 3.

Embodiment 7

As shown in FIG. 9 and FIG. 10 , this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 6. The diversion structure 4 in this embodiment divides the washing liquid flowing through the booster unit 3 into two parts. At least two water flows. In this embodiment, the water inlet of the washing liquid is divided into at least two at the water inlet end 9 of the booster unit 3, so that the washing liquid can obtain a higher water flow rate when it flows through the water inlet end 9 of the booster unit 3. The flow rate facilitates the subsequent acceleration of the washing liquid by the guide structure 4, further strengthens the spray pressure of the washing liquid, and improves the cleaning effect of the spray device. The cleaning strength improves the cleanliness of the tableware.

Embodiment 8

As shown in FIG. 4 to FIG. 7 , this embodiment is a further limitation of any one of the above-mentioned embodiments 1 to 7. The shower device in this embodiment includes a first part for forming the main body of the shower arm 1 The casing 101 and the second casing 102, wherein the spray hole 2 is arranged on the first casing 101, and the booster unit 3 is clamped and fixed by the first casing 101 and the second casing 102. In use, the user The spray arm 1 can be disassembled, and the booster unit 3 can be placed in the corresponding spray hole 2 according to actual needs, which improves the flexibility of the booster unit 3 in use. The first shell of the spray arm 1 The body 101 and the second casing 102 are connected by snap connection or screw connection, which is convenient for the user to disassemble.

Embodiment 9

As shown in FIG. 4 to FIG. 7 , this embodiment is a further limitation of any one of the above-mentioned embodiments 1 to 8. The spray arm 1 in this embodiment includes a Positioning structure 5. The positioning structure 5 is a columnar 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 booster unit 3 and is used to define the booster unit. 3. In the two translational degrees of freedom in the plane where the spray arm 1 is located, the booster 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 It can pass through the center of the booster unit 3 and play the role of a rotating shaft. In the actual structure, in order to better fix the booster unit 3, the positioning structure 5 can be stepped, or inside the corresponding spray hole 2, The stepped structure is provided, so that when the booster unit 3 rotates around the positioning structure 5, the freedom of movement in the vertical direction is also well restricted.

Embodiment ten

As shown in FIGS. 4 to 7 , this embodiment is a further limitation of the ninth embodiment above. The positioning structure 5 in this embodiment is a positioning pin passing through the center of the booster unit 3 .

Embodiment 11

As shown in FIG. 4 to FIG. 7 , this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 10. The spray arm 1 in this embodiment includes a washing machine for washing the flow through the booster unit 3 . The annular structure 6 for the liquid to guide the flow, the annular structure 6 is a ring arranged on the second housing 102 corresponding to the position of the spray hole 2 , and the annular structure 6 surrounds the booster unit 3 Internally, for limiting the two translational degrees of freedom of the booster unit 3 in the plane where the spray arm 1 is located, the annular structure 6 is provided with an opening for the washing liquid to flow through. When the washing liquid flows through the annular structure 6 , since the opening is smaller than the flow area of the spray chamber 8 , the washing liquid is accelerated when flowing through the opening, which further enables the washing liquid flowing through the water inlet 9 of the booster unit 3 to obtain a higher flow rate.

Embodiment 12

As shown in FIG. 1 to FIG. 7 , this embodiment is a further limitation of any one of the above-mentioned embodiments 1 to 11. The spray chamber 8 in this embodiment has the function of feeding the washing liquid from the water inlet pipe 7 . , accelerates the drainage structure flowing to the spray hole 2, and the drainage structure ensures the flow speed of the washing liquid in the spray chamber 8, so that the washing liquid can be kept at a relatively high level when it flows to the water inlet 9 of the booster unit 3. With a high flow rate, the pressurizing effect of the pressurizing unit 3 on the washing liquid is more obvious, which is beneficial to the washing of the dishes by the spray arm 1 .

Embodiment thirteen

As shown in FIG. 1 to FIG. 7 , this embodiment is a further limitation of the twelfth embodiment above. The cross-sectional area of the watershed of the spray chamber 8 at the water inlet pipe 7 in this embodiment is larger than that of any position of the spray chamber 8 cross-sectional area of the watershed.

Embodiment thirteen

As shown in FIG. 8 , the dishwasher according to this embodiment includes the spray device of the dishwasher according to any one of the above-mentioned first embodiment to the twelfth embodiment, and the spray device according to this embodiment is rotatable. It is arranged at the bottom of the water tank, and the washing liquid flows through the spray device to spray and wash the tableware arranged inside the water tank. For the high pressure cone.

In the description provided herein, numerous specific details are set forth. It will be 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 is to be understood that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or its description. This disclosure, however, should not be construed as reflecting an intention 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 features disclosed in this specification (including accompanying claims, abstract and drawings) and any method so disclosed may be employed in any combination, unless at least some of such features and/or procedures or elements are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, it will be understood by those skilled in the art that although some of the embodiments described herein include certain features, but not others, included in other embodiments, that combinations of features of different embodiments are intended to be within the scope of the invention within 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-described embodiments illustrate rather than limit the invention, and that alternative embodiments may be devised by those skilled in the art 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 a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. do not denote any order. These words can be interpreted as names.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (10)

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 with the spraying hole (2) through a positioning structure (5) arranged in the spraying arm (1).

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 1, 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 diversion structure (4), the acting force for driving the pressurization unit (3) to rotate is obtained under the action of the diversion surface.

6. The spray device of a dishwasher according to claim 5, wherein: the flow guide surface is an arc surface with an inclination angle along the axial direction of the pressurizing unit (3).

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

8. 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).

9. The spray device of a dishwasher according to claim 8, 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).

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.

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