CN111000514A

CN111000514A - Dish washing machine

Info

Publication number: CN111000514A
Application number: CN201911157315.6A
Authority: CN
Inventors: 解婷; 杨林
Original assignee: Qingdao Haier Dishwasher Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-04-14

Abstract

The invention relates to the technical field of household appliances, and discloses a dish washing machine. The dishwasher comprises an inner container and a spraying arm rotatably arranged in the inner container, wherein a first magnetic part is arranged at least one end of the spraying arm along the length direction, a second magnetic part is arranged on the side wall of the inner container, and when the first magnetic part rotates along with the spraying arm to be close to or far away from the second magnetic part, the second magnetic part can enable the rotating speed of the spraying arm to be changed. According to the invention, the first magnetic part is arranged on the spray arm, the second magnetic part is arranged on the inner container, and the interaction between the first magnetic part and the second magnetic part is utilized, so that the speed increasing and the speed reducing of the spray arm are realized, the noise of the dish-washing machine is reduced, and the production cost is saved.

Description

Dish washing machine

Technical Field

The invention relates to the technical field of household appliances, in particular to a dish washing machine.

Background

During the operation of the dishwasher, it is sometimes necessary to change the rotational speed of the spray arms in order to achieve a better washing result. The change of the rotating speed of the existing spray arm is mostly realized through a variable frequency motor, and the pressure and the flow speed of water flow can be changed by changing the rotating speed of the variable frequency motor, so that the rotating speed of the spray arm is changed. Such a solution has the following problems: 1. the cost of the variable frequency motor is relatively high, which results in high cost of the dishwasher. 2. When the rotating speed of the variable frequency motor is increased, the noise generated by the variable frequency motor is increased, so that the experience of a user is poor.

Therefore, a low-cost, low-noise dishwasher that can adjust the rotation speed of the spray arm conveniently is needed to solve the above problems.

Disclosure of Invention

Based on the above, the present invention is directed to provide a dishwasher that can improve a washing effect of the dishwasher by changing a rotation speed of a spray arm without increasing noise and cost.

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

a dish washing machine comprises an inner container and a spraying arm rotatably arranged in the inner container, wherein a first magnetic part is arranged at least one end of the spraying arm along the length direction, a second magnetic part is arranged on the side wall of the inner container, and when the first magnetic part rotates along with the spraying arm to be close to or far away from the second magnetic part, the second magnetic part can enable the rotating speed of the spraying arm to be changed.

As a preferable embodiment of the dishwasher, the second magnetic member is located at the same level as the first magnetic member.

As a preferable scheme of the dishwasher, the first magnetic member is a permanent magnet, an S pole and an N pole of the permanent magnet are respectively close to two long sides of the spray arm, and a connection line of the S pole and the N pole of the permanent magnet is perpendicular to a length direction of the spray arm.

As a preferred scheme of the dish washing machine, permanent magnets are arranged at two ends of the spraying arm along the length direction, and S poles and N poles of the two permanent magnets are arranged in a crossed mode.

As a preferable scheme of the dishwasher, the shape of the inner container is square, and the second magnetic part is arranged on one or more side walls of the inner container.

As a preferable scheme of the dishwasher, the second magnetic parts are arranged on two opposite side walls of the inner container, and the two second magnetic parts are distributed diagonally and diagonally.

As a preferable scheme of the dishwasher, the second magnetic member is an electromagnet, the electromagnet is fixed on the outer side wall of the inner container, and the magnetic pole direction of the electromagnet can be changed along with the change of the current direction.

As a preferable scheme of the dishwasher, the first magnetic part and the spray arm are fixed by sticking or by a fastener; the second magnetic part and the inner container are fixed through pasting or fastening pieces.

As a preferred scheme of the dish washing machine, at least one group of spray arms is arranged in the inner container along the height direction, each group of spray arms is provided with the first magnetic part, the side wall of the inner container is provided with at least one group of second magnetic parts along the height direction, and each group of second magnetic parts and each group of spray arms are arranged in a one-to-one correspondence mode.

As a preferable scheme of the dish washing machine, at least one rotary driving hole and a plurality of spraying holes are formed in the spraying arm.

The invention has the beneficial effects that:

the invention provides a dish washing machine, which comprises an inner container and a spray arm rotatably arranged in the inner container, wherein at least one end of the spray arm in the length direction is provided with a first magnetic part, the side wall of the inner container is provided with a second magnetic part, and when the first magnetic part rotates along with the spray arm to be close to or far away from the second magnetic part, the second magnetic part can change the rotating speed of the spray arm. According to the invention, the first magnetic part is arranged on the spray arm, the second magnetic part is arranged on the inner container, and the interaction between the first magnetic part and the second magnetic part is utilized, so that the speed increasing and the speed reducing of the spray arm are realized, the noise of the dish-washing machine is reduced, and the production cost is saved.

The first magnetic part adopts a permanent magnet, the second magnetic part adopts an electromagnet, when the electromagnet is electrified with forward current, the electromagnet generates a magnetic pole at one side close to the spray arm, if the magnetic pole is S pole, when the clockwise rotating spray arm is close to the magnetic pole, the attraction of different poles can be generated, when the spray arm is far away from the magnetic pole, the repulsion of the same grade can be generated, and the two forces have the same direction with the driving force of the spray arm, so that the rotating speed of the spray arm is increased. When the electromagnet is electrified with reverse current, the magnetic pole of the electromagnet is reversed and changed into an N pole, at the moment, when the spraying arm rotating clockwise is close to the magnetic pole, repulsion force of the same level can be generated, when the spraying arm is far away from the magnetic pole, attraction force of different poles can be generated, the directions of the two forces are opposite to the driving direction of the spraying arm, and therefore the rotating speed of the spraying arm is reduced.

Drawings

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

FIG. 2 is a schematic diagram of a spray arm of a dishwasher in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a dishwasher according to an embodiment of the present invention when a forward current is applied to an electromagnet;

fig. 4 is a schematic view of a dishwasher according to an embodiment of the present invention when a reverse current is applied to an electromagnet.

In the figure:

1-inner container; 2-a spray arm; 21-a rotary drive aperture; 22-spray holes; 3-a first magnetic member; 4-a second magnetic member; 5-placing a bowl shelf; 6-water supply device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Fig. 1 is a schematic structural diagram of a dishwasher provided in this embodiment, and fig. 2 is a schematic structural diagram of a spray arm of the dishwasher provided in this embodiment. Referring to fig. 1 and 2, the embodiment provides a dishwasher for solving the problems of high noise and high cost caused by the fact that the rotating speed of a spray arm is changed by a variable frequency motor in the existing dishwasher. The dishwasher of the embodiment comprises a shell, an inner container 1, a spraying arm 2, a dish rack 5 and a water supply device 6. Wherein, the shell is arranged outside the inner container 1 and used for protecting the inner container 1. The bowl placing frame 5 is arranged inside the inner container 1, and the bowl placing frame 5 is used for placing tableware such as bowls, dishes or cups. The spray arm 2 is rotatably provided inside the inner tub 1, and can wash dishes on the dish rack 5 by spraying washing water. The spray arm 2 is a hollow housing, and is provided with a rotation driving hole 21 for driving the spray arm to rotate and a spray hole 22 for spraying washing water to the dishes on the dish rack 5. Preferably, in the embodiment, two adjacent rotation driving holes 21 and six spraying holes 22 uniformly distributed along the spraying arm 2 are formed in the spraying arm 2, and the reaction force of the water flow sprayed from the rotation driving holes 21 can drive the spraying arm 2 to rotate around the central shaft. The water supply device 6 is arranged at the bottom of the inner container 1, the water supply device 6 is connected with the spray arm 2 and used for supporting the spray arm 2, and meanwhile, a water supply channel of the water supply device 6 is communicated with an inner cavity of the spray arm 2 and used for supplying washing water into the spray arm 2.

With reference to fig. 1, at least one end of the spray arm 2 along the length direction of the embodiment is provided with a first magnetic member 3, the sidewall of the inner container 1 is provided with a second magnetic member 4, and when the first magnetic member 3 rotates along with the spray arm 2 to approach or leave the second magnetic member 4, the second magnetic member 4 can change the rotation speed of the spray arm 2. In the embodiment, the first magnetic part 3 is arranged on the spray arm 2, the second magnetic part 4 is arranged on the inner container 1, and the speed increasing and the speed reducing of the spray arm 2 are realized by utilizing the interaction between the first magnetic part 3 and the second magnetic part 4. Illustratively, when the spray arm 2 rotates clockwise to approach the second magnetic member 4, the second magnetic member 4 generates heteropolar attraction to the spray arm 2, so that the rotation speed of the spray arm 2 is increased; when the spray arm 2 rotates clockwise and is far away from the second magnetic part 4, the homopolar repulsion force generated by the second magnetic part 4 to the spray arm 2 also increases the rotating speed of the spray arm 2, thereby achieving the effect of accelerating the spray arm 2. Or when the spray arm 2 rotates clockwise to be close to the second magnetic part 4, the second magnetic part 4 generates homopolar repulsion to the spray arm 2, so that the rotating speed of the spray arm 2 is reduced; when the spray arm 2 rotates clockwise and is far away from the second magnetic part 4, the heteropolar suction force generated by the second magnetic part 4 to the spray arm 2 also reduces the rotating speed of the spray arm 2, thereby achieving the effect of reducing the speed of the spray arm 2. Of course, the spray arm 2 may also rotate in the counterclockwise direction, and the rotation speed of the spray arm 2 may be increased or decreased by changing the magnetic pole of the second magnetic member 4. Compared with the prior art, the embodiment does not need to be provided with a variable frequency motor, effectively reduces the noise of the dishwasher during operation and saves the production cost.

Further, in this embodiment, the second magnetic member 4 and the first magnetic member 3 should be located at the same horizontal height, so that the force direction of the spray arm 2 and the spray arm 2 are located in the same horizontal plane, the stability of the rotation of the spray arm 2 is ensured, and the spray arm 2 is prevented from shaking up and down.

Referring to fig. 2, the first magnetic member 3 of the present embodiment is preferably a permanent magnet, which can be fixed on the spray arm 2 by adhering or fixing the permanent magnet on the spray arm 2 by a fastening member. The S pole and the N pole of the permanent magnet are respectively close to two long edges of the spray arm 2, and the connecting line of the S pole and the N pole of the permanent magnet is perpendicular to the length direction of the spray arm 2, so that the stress of the spray arm 2 is more uniform, and the rotation is more stable. Preferably, permanent magnets are arranged at two ends of the spray arm 2 along the length direction, and the S poles and the N poles of the two permanent magnets are arranged in a crossed manner. That is, along the same long side of the shower arm 2, one end of the shower arm 2 is the S pole of one permanent magnet, and the other end of the shower arm 2 is the N pole of the other permanent magnet. Through all setting up the permanent magnet at the both ends at spray arm 2, when arbitrary one end of spray arm 2 was close to second magnetic part 4, the homoenergetic realized accelerating or slowing down spray arm 2 to increased spray arm 2 and accelerated or the number of times that slows down, effectively improved dish washer work efficiency. It should be noted that, in this embodiment, neither the spray arm 2 nor the inner container 1 acts on the permanent magnet, and the permanent magnet is preferably a high temperature resistant magnet.

Further, the shape of the liner 1 may be square, circular, oval, pentagonal, hexagonal or other irregular shapes. Preferably, the shape of the liner 1 in this embodiment is square. The square inner container 1 can be provided with a second magnetic element 4 on one or more side walls. Preferably, the second magnetic members 4 are disposed on two opposite sidewalls of the liner 1, and the two second magnetic members 4 are diagonally distributed. This setting enables the both ends of spray arm 2 to receive the effect of second magnetic part 4 simultaneously, has further increased the number of times that spray arm 2 increases speed or slows down, has improved dish washer's work efficiency.

Preferably, the second magnetic member 4 of this embodiment is an electromagnet, and the electromagnet is fixed on the outer side wall of the liner 1 by adhesion or by a fastening member. The magnetic pole direction of the electromagnet can be changed along with the change of the current direction, so that the speed of the spraying arm 2 can be adjusted more quickly and conveniently, and the automatic control of the dish-washing machine can be realized.

In this embodiment, when the electromagnet is not energized, the shower arm 2 is rotated by self-driving through the rotation driving hole 21, and the rotation speed at this time is the initial rotation speed. Fig. 3 is a schematic diagram of the dishwasher according to the present embodiment when the electromagnet is energized with a forward current, in which white arrows indicate the rotation direction of the spray arm 2, black arrows indicate the direction of the magnetic force applied to the spray arm 2, and a shaded portion is a track before the spray arm 2 rotates. Referring to fig. 3, when a forward current is applied to the electromagnet, the electromagnet generates a magnetic pole on a side close to the spray arm 2, and if the magnetic pole is S-pole, when the clockwise rotating spray arm 2 is close to the S-pole of the electromagnet, an attractive force of a different pole is generated, and when the spray arm 2 is far away from the S-pole of the electromagnet, a repulsive force of the same pole is generated, and both the two forces have the same direction as the driving force of the spray arm 2, so that the rotation speed of the spray arm 2 can be increased. Fig. 4 is a schematic diagram of the dishwasher according to the present embodiment when the electromagnet is energized with a reverse current, in which white arrows indicate the rotation direction of the spray arm 2, black arrows indicate the direction of the magnetic force applied to the spray arm 2, and a shaded portion indicates the track of the spray arm 2 before rotation. Referring to fig. 4, when a reverse current is applied to the electromagnet, the magnetic pole of the electromagnet is reversed to become an N pole. If the clockwise rotating spray arm 2 is close to the N pole of the electromagnet, the same-level repulsive force is generated, and if the clockwise rotating spray arm 2 is far away from the N pole of the electromagnet, the opposite-pole attractive force is generated, and the directions of the two forces are opposite to the driving force direction of the spray arm 2, so that the rotating speed of the spray arm 2 can be reduced.

Referring to fig. 1, in the liner 1 of the present embodiment, a plurality of groups of spray arms 2 (for example, two groups are provided in fig. 1) may be provided along the height direction, and each group of spray arms 2 is provided with a permanent magnet; meanwhile, the side wall of the inner container 1 may also be provided with a plurality of groups of electromagnets (for example, two groups are provided in fig. 1) along the height direction, wherein the height of each group of electromagnets is the same as the height of the corresponding group of spray arms 2. The multiple groups of spraying arms 2 can enable the dish washing machine to work more efficiently, and the cleaning effect is better. The rotation directions of the plurality of sets of spray arms 2 may be the same or different, the rotation speeds may be the same or different, and the rotation of the spray arms 2 of each set does not affect each other.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The dishwasher is characterized by comprising an inner container (1) and a spraying arm (2) rotatably arranged in the inner container (1), wherein at least one end of the spraying arm (2) in the length direction is provided with a first magnetic part (3), the side wall of the inner container (1) is provided with a second magnetic part (4), and when the first magnetic part (3) rotates along with the spraying arm (2) to be close to or far away from the second magnetic part (4), the second magnetic part (4) can enable the rotating speed of the spraying arm (2) to be changed.

2. The dishwasher of claim 1, characterized in that the second magnetic element (4) is at the same level as the first magnetic element (3).

3. The dishwasher of claim 1, characterized in that the first magnetic member (3) is a permanent magnet having an S-pole and an N-pole respectively adjacent to the two long sides of the spray arm (2), and the line connecting the S-pole and the N-pole of the permanent magnet is perpendicular to the length direction of the spray arm (2).

4. The dishwasher of claim 3, characterized in that the spray arm (2) is provided with permanent magnets at both ends in the length direction, and the S poles and the N poles of the two permanent magnets are arranged in a cross way.

5. The dishwasher of claim 1, characterized in that the shape of the inner container (1) is square, the second magnetic element (4) being provided on one or more side walls of the inner container (1).

6. The dishwasher of claim 5, characterized in that the second magnetic members (4) are arranged on two opposite side walls of the inner container (1), and the two second magnetic members (4) are diagonally distributed.

7. The dishwasher of claim 1, characterized in that the second magnetic member (4) is an electromagnet fixed to the outer side wall of the inner container (1), and the magnetic pole direction of the electromagnet can be changed along with the change of the current direction.

8. The dishwasher of any one of claims 1 to 7, characterized in that the first magnetic element (3) is fixed to the spray arm (2) by gluing or by fastening; the second magnetic part (4) and the inner container (1) are fixed through pasting or fastening pieces.

9. The dishwasher according to any one of claims 1 to 7, characterized in that at least one set of the spray arms (2) is arranged in the inner container (1) along the height direction, the first magnetic member (3) is arranged on each set of the spray arms (2), at least one set of the second magnetic members (4) is arranged on the side wall of the inner container (1) along the height direction, and each set of the second magnetic members (4) is arranged in one-to-one correspondence with each set of the spray arms (2).

10. The dishwasher of any one of claims 1 to 7, characterized in that the spray arm (2) is provided with at least one rotary drive aperture (21) and a plurality of spray apertures (22).