WO2018214381A1

WO2018214381A1 - Spray arm connection mechanism for dishwashing machine, and dishwashing machine

Info

Publication number: WO2018214381A1
Application number: PCT/CN2017/105449
Authority: WO
Inventors: 徐伟; 董媛媛; 杨林
Original assignee: 青岛海尔洗碗机有限公司
Priority date: 2017-05-25
Filing date: 2017-10-10
Publication date: 2018-11-29
Also published as: CN108926308B; CN108926308A

Abstract

A spray arm connection mechanism for a dishwashing machine, and dishwashing machine. The mechanism comprises a spray arm (1) and a base (3) fixed on an inner container (2). The spray arm (1) has an opening (6) and a spray base (4). The spray base (4) has a water flow channel (7) therein, and a lower portion connected to the base (3). The spray arm (1) is assembled and rotatably connected to the spray base (4). Opposite rotating surfaces are arranged between the spray base (4) and the spray arm (1), and magnetic materials having the same polarity are provided on the two rotating surfaces, respectively. Between the spray base (4) and the spray arm (1), repulsion between magnetic members having the same polarity is employed to cancel a total vertical force of water, thus removing the influences of friction between the upper and lower rotating surfaces. The present invention eliminates a spray arm ring structure to provide a simple structure, and enables stable and smooth rotation of the spray arm (1).

Description

Dishwasher spray arm connecting structure and dishwasher

Technical field

The invention relates to a dishwasher, in particular to a connection structure of a dishwasher spray arm, belonging to the technical field of dishwashers.

Background technique

The dishwasher is a device for cleaning the tableware by spraying high-pressure washing water with a nozzle. The dishwasher generally includes a dishwasher liner forming a cleaning chamber, a tableware input port in front of the inner liner, and a door body at the input port of the tableware. A dish rack, a shower device, and the like are provided in the washing chamber.

In order to achieve a better cleaning effect, the existing sprinkler installed in the dishwasher is generally a rotatable spray arm, and a plurality of spray holes are opened on the spray arm, and the spray arm is rotatably connected On the inner body of the liner, the spray arm communicates with the waterway, and the water in the waterway is sprayed through the spray hole on the spray arm to clean the tableware placed in the inner tank.

The connection structure between the existing spray arm and the inner body of the liner is to connect the spray arm to the inner body of the bladder through a spray arm ring, and the spray arm is set on the outer side of the spray arm ring, and the spray arm ring is set inside. The outer side of the bladder body rotates around the inner body of the bladder. The purpose of setting the spray arm ring is to increase the contact area between the spray arm and the body of the liner, so as to ensure that there is no up and down twisting or twisting left and right when rotating, and the resistance during operation is reduced. However, the connection structure still has the following problems in implementation. First, when the spray arm of the dishwasher is running, the spray arm and the spray arm ring are still in rotation between the spray arm ring and the inner body of the liner. Up and down and left and right activities, this will cause the rotation of the spray arm to be blocked, and the spray arm ring in the middle can only be made into two pieces together due to the installation restrictions, and the two pieces are pasted or buckled. The way is fixedly connected together, so that there will be a non-smooth point in the splicing place, and it is locked by the reverse buckle, which makes the disassembly and assembly difficult.

Summary of the invention

The technical problem to be solved by the present invention is to provide a dishwasher spray arm connecting structure which can make the spray arm rotate more smoothly and smoothly, and a dishwasher equipped with the spray arm connecting structure.

In order to achieve the above object, the technical solution of the present invention is:

A dishwasher spray arm connecting structure comprises a spray arm and a base fixed on the inner tank, the spray arm has an opening, and further comprises a spray seat, wherein the spray seat has a water flow passage, The bottom of the spray seat is connected to the base, and the spray arm is set on the spray seat to be rotatably connected with the spray seat, the spray seat and the spray The spray arms have opposite rotating surfaces, and the same magnetic material is respectively mounted on the two rotating surfaces.

Further, the shower seat is composed of an upper flow guiding portion and a lower fixing portion, and the flow guiding portion and the fixing portion have a separate structure and are fixedly connected by a snapping manner.

Further, the flow guiding portion and the fixing portion are gap-fitted in the horizontal direction.

Further, the top of the fixing portion is an elastic engaging portion, and the elastic engaging portion is fastened to the flow guiding portion after passing through the through hole for the water circulation at the bottom of the guiding portion.

Further, the elastic snap portion is composed of a plurality of diagonal hooks, and each of the hooks has a gap for contraction therebetween.

Further, the flow guiding portion is installed inside the spray arm, the inner surface of the spray arm opening is a lower rotating surface, and the lower surface of the flow guiding portion is an upper rotating surface.

Further, the fixing portion of the shower seat and the base are fixedly connected by a turn button.

Further, the fixing portion of the shower seat is sleeved on the base, and has a plurality of screw grooves on the side wall of the fixing portion, and a plurality of rotation buttons are disposed on the outer circumferential surface of the base .

Further, a downwardly projecting stop is provided around the opening on the lower surface of the spray arm, the stop and the shower seat being in a clearance fit.

Another technical solution of the present invention is:

A dishwasher includes a housing, a bladder, a spray arm, and a waterway system, the spray arm being coupled to the bladder by a connection structure as described above.

In summary, the dishwasher spray arm connecting structure and the dishwasher according to the present invention have the following advantages compared with the prior art:

(1) The present invention utilizes the repulsive action between the shower seat and the spray arm to cancel the longitudinal force of the water body itself, thereby eliminating the friction between the upper and lower rotating surfaces, and omitting the prior art. The structure of the spray arm ring makes the structure simpler and makes the rotation of the spray arm smoother and smoother.

(2) According to the optimized design of the structure, the spray seat and the base of the inner tank are fixedly connected by a turn-locking manner, and the sprinkling seat can be disassembled and assembled by screwing in and unscrewing, and spraying The guide portion of the shower seat and the fixed portion are fixedly connected by an elastic snap-fit structure, which is easy to assemble and disassemble, and is convenient for daily maintenance.

DRAWINGS

Figure 1 is a schematic view showing the connection structure of the spray arm of the dishwasher of the present invention;

Figure 2 is a partial enlarged view of I of Figure 1;

Figure 3 is a schematic view showing the structure of a shower seat of the shower seat of the present invention;

Figure 4 is a schematic view showing the structure of the base of the present invention;

Figure 5 is a schematic view of the structure of the dishwasher of the present invention.

As shown in FIG. 1 to FIG. 5, the spray arm 1, the inner tank 2, the base 3, the shower seat 4, the spray hole 5, the opening 6, the water flow passage 7, the flow guiding portion 8, and the upper deflector 8a, Lower baffle 8b, deflector rib 8c, diverting portion 8d, fixing portion 9, upper portion 9a, lower portion 9b, waterway system 10, elastic snap portion 11, hook 12, contraction gap 13, water chamber 14, The turnbuckle 15, the rotating portion 16, the lower rotating surface 17, the upper rotating surface 18, the first magnet 19, the second magnet 20, the stop 21, the first gap 22, and the second gap 23.

detailed description

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

Embodiment 1:

As shown in FIG. 1 and FIG. 2, the present invention provides a dishwasher spray arm connecting structure, including a spray arm 1, a base 3 fixed to the inner liner 2, and a shower seat 4. The spray arm 1 is composed of two upper and lower arm plates, and the upper and lower arm plates form a water chamber 14. The upper and lower arm plates of the spray arm 1 are provided with a plurality of spray holes 5, and the spray holes 5 are provided. It is in communication with the water chamber 14. There is an opening 6 in the center of the lower arm plate of the spray arm 1, the spray arm 1 is set on the spray seat 4 and is connected to the spray seat 4, and the bottom of the spray seat 4 is connected with the base 3, and the spray seat 4 is connected. There is a water flow channel 7, the water chamber 14 of the spray arm 1 communicates with the water passage 7 and communicates with the water system through the water flow passage 7, and the tap water is sprayed through the spray hole 5 on the spray arm 1 to be cleaned and placed in the inner tank. 2 tableware.

The shower seat 4 is composed of an upper flow guiding portion 8 and a lower fixing portion 9. In the present embodiment, the flow guiding portion 8 and the fixing portion 9 adopt a separate structure, and the flow guiding portion 8 and the fixing portion 9 pass the card. The connection method enables a detachable fixed connection. The flow guiding portion 8 and the fixing portion 9 are integrally injection molded from a plastic material.

As shown in FIGS. 2 and 3, the flow guiding portion 8 is composed of an upper deflector 8a, a lower deflector 8b, and a plurality of guide ribs 8c in the middle, and has a through hole as a water flow passage on the lower deflector 8b. . The diameters of the upper baffle 8a and the lower baffle 8b may be the same or different, and the diameter of the upper baffle 8a is smaller than the diameter of the lower baffle 8b. The guide ribs 8c are evenly arranged three to six in the circumferential direction, and the plurality of guide ribs 8c are radially disposed around the axis of the flow guiding portion 8, and water flows between the adjacent flow guiding ribs 8c. Channel. At a central position of the lower surface of the upper baffle 8a, there is a downwardly projecting diverting portion 8d. The diverting portion 8d has an inverted conical shape, and the water flowing vertically from below into the diversion portion 8 impinges on the diverting portion 8d, and the water flows in the diverting portion. 8d, the flow is evenly distributed in the outer circumferential direction, and flows out from the passage between the guide ribs 8c into the water chamber 14 on both sides in the horizontal direction, and finally is ejected from the spray holes 5 on the arm plate. The amount of water and water pressure sprayed from each spray hole 5 are ensured to ensure the cleaning effect. At the same time, the spray arm 1 rotates around the shower seat 4 under the action of the thrust of the water flow.

As shown in Fig. 3, the fixing portion 9 includes upper and lower portions, the diameter of the upper portion 9a is smaller than the diameter of the lower portion 9b, the upper portion 9a is for passing through the through hole at the bottom of the flow guiding portion 8, and the lower portion 9b is used for fitting On the base 3. The upper portion 9a and the lower portion 9b are integrally injection molded structures. The center of the upper portion 9a and the lower portion 9b has a through hole as a water flow passage.

In this embodiment, the top of the fixing portion 9 is an elastic engaging portion 11 , and the elastic engaging portion 11 passes through the through hole at the bottom of the guiding portion 8 and then is fastened to the lower deflector of the guiding portion 8 . 8b. Wherein, the elastic snap portion 11 is composed of a plurality of diagonal hooks 12, and each of the hooks 12 has a contraction gap 13 for contraction. In a normal state, the outer diameter of the hook 12 is larger than that of the through hole. Diameter, the hook 12 adopts a diagonal structure to facilitate passage through the through hole. During installation, the top of the fixing portion 9 is passed through the opening 6 on the lower arm plate of the spray arm 1, and the through hole at the bottom of the flow guiding portion 8 is passed through the elastic engaging portion 11 at the top of the fixing portion 9 through the through hole. When the elastic snap-fit portion 11 is contracted toward the center, it is expanded by the elastic force, and the hook 12 is inverted on the upper surface of the lower deflector 8b to realize the between the flow guiding portion 8 and the fixed portion 9. The connection is fixed, and finally the upper and lower arm plates of the spray arm 1 are fastened together.

In this embodiment, in order to facilitate the disassembly and assembly, the fixing portion 9 and the base 3 are fixedly connected by a turn button. As shown in FIG. 3, a plurality of screw grooves are formed on the side wall of the lower portion 9b of the fixing portion 9, and as shown in FIG. 4, a plurality of buckles 15 are correspondingly provided on the outer circumferential surface of the base 3, and the plurality of buckles 15 are provided. 15 Screwing in or unscrewing the screw groove can realize the disassembly and assembly of the spray seat 4, which is simple and convenient to operate and convenient for daily maintenance. For the convenience of operation, an annular rotating portion 16 for operation is formed outwardly at the bottom of the side wall of the fixing portion 9. The rotating portion 16 has a plum blossom shape, and the operator holds the plum-shaped rotating portion 16 by hand to rotate the fixing portion 9. The attachment and detachment of the fixing portion 9 can be achieved. The direction in which the fixing portion 9 rotates is matched with the direction in which the shower arm 1 rotates, and when the shower arm 1 is rotated, the fixing portion 9 is not unscrewed from the base 3.

As shown in FIG. 2, the opening 6 of the spray arm 1 is sleeved on the outside of the fixed portion 9, and the flow guiding portion 8 is mounted inside the spray arm 1, with relative rotation between the spray arm 1 and the flow guiding portion 8. surface. The inner surface of the opening 6 of the spray arm 1 is the lower rotating surface 17, and the lower surface of the lower deflector 8b of the flow guiding portion 8 is the upper rotating surface 18, in the present embodiment, on the upper rotating surface 18 and the lower rotating surface 17, The magnetic material is separately mounted, the magnetic material is preferably a magnet, the first magnet 19 is mounted on the upper rotating surface 18, and the second magnet 20 is mounted on the lower rotating surface 17, and the first magnet 19 and the second magnet 20 are arranged in a ring shape or circumferentially. The segments are set, and the magnetic poles of the first magnet 19 and the second magnet 20 are the same. After installation, the first magnet 19 and the second magnet 20 are repelled due to the same magnetic poles. First magnet 19 and second The magnet 20 is embedded in the lower deflector 8b and the arm plate of the spray arm 1 by in-mold molding.

During the spraying process, the washing water entering from the water inlet at the bottom of the fixing portion 9 is upward along the water flow passage at the center of the fixing seat 9 and the flow guiding portion 8, and under the action of the water pressure, the water flow impacts upward on the flow guiding portion 8. The deflector 8a, the water flow uplifts the upper baffle 8a to a certain extent, and then lifts up the flow guiding portion 8, while using the mutual repelling between the first magnet 19 and the second magnet 20 to offset the water body itself. The longitudinal force is combined to maintain a certain gap between the upper rotating surface 18 and the lower rotating surface 17, so as to prevent the upper rotating surface 18 from directly rubbing against the lower rotating surface 17, so that the rotation of the spray arm 1 is smoother and smoother. This structure omits the structure of the spray arm ring in the prior art, and the connection structure of the spray arm 1 is made simpler. In this embodiment, it is also possible to adjust the area of the water inlet of the shower seat 4, that is, to increase the area of the water inlet, so that the area of the water inlet is larger than the sum of the water discharge areas of all the spray holes 5, thereby reducing the longitudinal combined force of the water body itself. .

On the lower surface of the lower arm plate of the spray arm 1, a downwardly projecting stop 21 is provided around the opening 6, and the stop 21 is arranged annularly around the fixed portion 9. The gap between the stopper 21 and the fixing portion 9 is a clearance fit. Similarly, the flow guiding portion 8 is also gap-fitted in the horizontal direction between the position of the through hole and the fixing portion 9. The first gap 22 between the stop 21 and the fixing portion 9 is consistent with the second gap 23 between the flow guiding portion 8 and the fixing portion 9, and is also increased or decreased. In this embodiment, the first control is preferably controlled. Both the gap 22 and the second gap 23 are maintained at 0.2 mm, so that the upper and lower coaxiality when the flow guiding portion 8, the fixing portion 9 and the spray arm 1 are rotated can be effectively ensured, even during the rotation, even in the upper portion Or the lower portion has a small degree of eccentricity, and the first gap 22 and the second gap 23 also play a mutually restricting role, ensuring that the spray arm 1 does not undergo excessive shaking when rotating, and reduces the sway resistance during rotation, thereby further Ensure that the spray arm 1 rotates smoothly, and there is no jamming during operation.

Embodiment 2:

As shown in FIG. 5, the present invention further provides a dishwasher including a casing, a tank 2, a spray arm 1 and a waterway system, and a tableware input port (not shown) in front of the inner liner 2, A door body is provided at the entrance of the tableware, and a tableware shelf or the like is provided in the washing chamber, and the waterway system 10 is installed between the casing and the inner casing 2. The spray arm 1 is fixedly mounted on the top wall or the bottom wall of the inner liner 2 by the connecting structure described in the first embodiment, and a plurality of spray holes 5 are mounted on the spray arm 1.

In this embodiment, two spray arms 1 are mounted on the bottom wall of the inner liner 2, and the two spray arms 1 have a certain drop in the height direction, and the two spray arms 1 rotate independently in different planes. The spray arms 1 of the two groups can also adopt different spray methods, one of which adopts a rotatable structure and the other of which adopts a fixed stationary structure.

As described above, a similar technical solution can be derived by combining the contents of the schemes given in the drawings. But everything Any simple modifications, equivalent changes and modifications to the above embodiments in accordance with the technical scope of the present invention are still within the scope of the technical solutions of the present invention.

Claims

A dishwasher spray arm connecting structure comprises a spray arm and a base fixed on the inner tank, wherein the spray arm has an opening, and further comprises a spray seat, wherein the spray seat Having a water flow channel, the bottom of the shower seat is connected to the base, and the spray arm is disposed on the spray seat and is rotatably connected to the spray seat, and the shower seat and the spray arm have The opposite rotating surfaces are respectively mounted with the same magnetic material on the two rotating surfaces.
The dishwasher spray arm connecting structure according to claim 1, wherein the shower seat is composed of an upper flow guiding portion and a lower fixing portion, and the flow guiding portion and the fixing portion are separated. The structure is fixedly connected by means of a snap-fit.
The dishwasher spray arm connecting structure according to claim 2, wherein the flow guiding portion and the fixing portion are gap-fitted in a horizontal direction.
The sprayer attachment structure of the dishwasher according to claim 2, wherein the top of the fixing portion is an elastic snap portion, and the elastic snap portion passes through the through hole for water circulation at the bottom of the flow guiding portion. The back is snapped onto the flow guide.
The dishwasher spray arm connecting structure according to claim 4, wherein the elastic engaging portion is composed of a plurality of diagonal hooks, and each of the hooks has a contraction between the hooks. gap.
The dishwasher spray arm connecting structure according to claim 2, wherein the flow guiding portion is installed inside the spray arm, and an inner surface of the spray arm opening is a lower rotating surface. The lower surface of the flow guiding portion is an upper rotating surface.
The dishwasher spray arm connecting structure according to claim 2, wherein the fixing portion of the shower seat and the base are fixedly connected by a turn button.
The dishwasher spray arm connecting structure according to claim 7, wherein the fixing portion of the shower seat is fitted on the base, and has a plurality of turns on the side wall of the fixing portion. The groove is provided with a plurality of knobs on the outer peripheral surface of the base.
The dishwasher spray arm connecting structure according to claim 1, wherein a downwardly projecting stop is arranged around the opening on a lower surface of the spray arm, the stop and the spray The gap between the seats is matched.
A dishwasher comprising a casing, a casing, a spray arm and a waterway system, characterized in that the spray arm is connected to the inner tank by a connecting structure according to any one of claims 1-9.