KR102311407B1 - Rotor assembly for dishwasher - Google Patents

Abstract

The present invention relates to a rotor rotating while spraying water inside a dishwasher, comprising: a first rotor rotatably installed with respect to the floor of an internal space of the dishwasher; a first gear coaxially rotating with the first rotor; , a second rotor rotatably installed with respect to the first rotor, the rotation axis of which is spaced apart from the rotation axis of the first rotor, a second gear coaxially rotating with the second rotor, and the first gear and an intermediate gear engaged between the second gear and rotatably installed with respect to the first rotor.

Description

Rotor assembly for dishwashers {ROTOR ASSEMBLY FOR DISHWASHER}

The present invention relates to a dishwasher, and more particularly, to a rotor rotating while spraying water inside the dishwasher.

The dishwasher operates by spraying pressurized water to wash dishes, etc. accommodated in the washing space. In this case, there are many examples in which water is sprayed from the rotating rotor in order to evenly spray the pressurized water in the washing space.

A rod-shaped rotor 50 as illustrated in the perspective view of FIG. 1 is employed as a configuration for spraying water inside the dishwasher. This rotor 50 is supplied with pressurized water through its rotation shaft, and this pressurized water is ejected from the ejection port 52, in particular, the ejection port 52 on the wing tip side is directed in the circumferential direction. A rotational force of the rotor 50 is obtained as a reaction force.

However, this rod-type rotor 50 can rotate only around its rotational axis 51, so as illustrated in the schematic plan view of FIG. will draw Therefore, the dishwasher employing the rotary blade 50 according to the prior art has a limitation in that an effective washing effect can be obtained only within the range of the circular trajectory A. This results in that the bottom shape of the washing space is limited to a square shape, or that, for example, the washing force is lowered at the corners.

US 20-0341841 Y1

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a rotor assembly for a dishwasher capable of maximally securing an effective washing range even for a washing space having a square or rectangular bottom shape.

Another object of the present invention is to provide a rotor assembly for a dishwasher that is easy to maintain.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above object, a rotor assembly for a dishwasher according to the present invention includes a first rotor that is rotatably installed with respect to the bottom of an inner space of the dishwasher, and a first gear that rotates coaxially with the first rotor. and a second rotor rotatably installed with respect to the first rotor, the rotation axis of which is spaced apart from the rotation axis of the first rotor, a second gear coaxially rotating with the second rotor, and the first It may include an intermediate gear meshed between the gear and the second gear and rotatably installed with respect to the first rotor.

The rotor assembly for a dishwasher according to the present invention may further include a counter weight installed on the first rotor.

In the rotor assembly for a dishwasher according to the present invention, all of the first gear, the second gear, and the intermediate gear may be installed on a bottom surface of the first rotor to be accessible from the outside.

Meanwhile, in the rotor assembly for a dishwasher according to the present invention, the first rotor and the second rotor rotate in opposite directions, and the number of rotations of the first rotor with respect to the dishwasher and the number of rotations of the second rotor with respect to the first rotor The ratio of the rotation speed to the rotation speed may be 1:2.

In addition, in the rotor assembly for a dishwasher according to the present invention, the second rotor includes a short wing portion extending a relatively short radius from the rotation axis of the second rotor, and a relatively long wing portion opposite to the short wing portion from the rotation shaft. It may include a long wing portion extending radially. Here, two long-side wing parts are provided, and a Y-shaped planar arrangement can be achieved together with the short-side wing part. In addition, it may further include a counterweight installed on the single wing portion.

According to the present invention, since the washing water can be sprayed in the non-circular area through the complex rotational motion of the first rotor and the second rotor, the washing area can be increased.

In addition, the power transmission structure between the first rotor and the second rotor is strong and can be accessed directly from the outside, so maintenance is easy.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view showing an example of a rotor for a dishwasher according to the prior art.
FIG. 2 is a plan view schematically illustrating a washing area that the rotor of FIG. 1 can cover.
3 is a perspective view of an embodiment of a rotor assembly for a dishwasher according to the present invention.
Fig. 4 is a plan view of the embodiment of Fig. 3;
Fig. 5 is a bottom view of the embodiment of Fig. 3;
6 is a plan view schematically illustrating the use state of the embodiment of FIG. 3 for each rotation angle.
7 is a plan view schematically illustrating a washing area that the embodiment of FIG. 3 can cover.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

3 is a perspective view of an embodiment of a rotor assembly for a dishwasher according to the present invention, and FIGS. 4 and 5 are a plan view and a bottom view of the embodiment of FIG. 3 , respectively.

The rotor assembly for a dishwasher according to the present invention includes a first rotor 110 and a second rotor 120 .

The first rotor 110 is rotatably installed with respect to the bottom surface of the inner space of the dishwasher, and may be supplied with pressurized water through a rotating shaft to be ejected through the first outlet 112 . A plurality of first ejection ports 112 may be provided, and at least some of them eject pressurized water at least partially in the circumferential direction, so that the first rotor 110 may rotate according to the reaction thereof. Here, 'at least partially in the circumferential direction' means that when the jet direction of the ejected pressurized water is viewed as a vector, this vector includes a component in a direction tangent to the circumferential direction.

The second rotor 120 is rotatably installed on the first rotor 110 , and may receive pressurized water from the first rotor 110 and eject it through the second jet port 122 . A plurality of the second spout 122 may also be provided, and at least some of them eject pressurized water at least partially in the circumferential direction, so that the second rotor 120 may rotate according to the reaction thereof. As will be described later, since the first rotor 110 and the second rotor 120 are meshed through the intermediate gear 130 , the rotational force through the ejection of the pressurized water as described above is the first rotor 110 or the second rotor 120 . It's enough to get it from just one of them. However, due to the geometrical characteristics of the first rotor 110 and the second rotor 120, even if water is ejected at the same pressure and flow rate, the rotational force that can be obtained from the first and second outlets 112 and 122, respectively. There is a difference, and in that the first rotor 110 and the second rotor 120 can rotate in opposite directions to each other, the first rotor 110 and the second rotor 120 for smooth rotation of each rotor. ) is preferably capable of squirting water, respectively.

The rotation shaft of the second rotor 120 is spaced apart from the rotation shaft of the first rotor 110 , and the intermediate gear 130 may be engaged therebetween to be mutually gear-coupled. This relationship is illustrated in FIG. 5 . The first gear 111 rotates together with the first rotor 110 , and the center of rotation of the first gear 111 becomes the axis of rotation of the first rotor 110 . The second gear 121 rotates with respect to the first rotor 110 together with the second rotor 120 , and the center of rotation of the second gear 121 becomes the axis of rotation of the second rotor 120 . The rotation center of the first gear 111 and the rotation center of the second gear 121 are spaced apart from each other by a distance d, and the intermediate gear 130 between them is the first gear 111 and the second gear 121 ) are interlocked with each other. Here, since the second gear 121 is rotatably installed with respect to the first rotor 110, when the first rotor 110 rotates, it rotates about the center of rotation of the first gear 111, that is, while revolving, The second gear 121 is also rotated about the center of rotation, that is, it is in a state of rotation. As a result, when only one intermediate gear 130 is provided, when the first rotor 110 rotates in a clockwise direction with respect to the dishwasher, the second rotor 120 may rotate in a counterclockwise direction.

On the other hand, the gear ratio of the first gear 111 and the second gear 121 may be 2:1, in this case, the second gear 121 is the second gear 121 while the first gear 111 rotates, for example, clockwise once. Since it rotates twice in the counterclockwise direction with respect to one gear 111 , the ratio of the number of rotations of the first rotor 110 and the second rotor 120 is 1:2. This can be observed from the user's point of view that the second rotor 120 rotates once in the counterclockwise direction while the first rotor 110 rotates once in the clockwise direction. That is, while the first rotor 110, for example, rotates once in a clockwise direction with respect to the dishwasher, the second rotor 120 rotates twice in a counterclockwise direction with respect to the first rotor 110, and simultaneously in the dishwasher. This may result in one rotation in the counterclockwise direction.

In particular, the first gear 111, the second gear 121, and the intermediate gear 130 are all disposed on the bottom side of the first rotor 110 as illustrated in FIG. 5 and exposed to be accessed from the outside. it is preferable This allows the user to easily access and solve problems when there is a problem such as foreign substances such as food scraps being caught between the gears or other cleaning is required.

The second rotor 120 may include a short wing portion 120a and a long wing portion 120b. 4 and short-side blade portions (120a), as illustrated in Figure 5 is a second and a portion extended by a radial direction a relatively short radial length (L _S) from the axis of rotation of the rotor 120, a long side wing portions (120b) is a portion extending by a _{relatively long radial length (L R} ) from the axis of rotation of the second rotor 120 . Considering that the second rotor 120 is a rotating body, it is preferable that the long-side wing portion 120b extends opposite to the short-side wing portion 120a. In particular, when both the long wing part 120b and the short wing part 120a are one, the long wing part 120b and the short wing part 120a may have a bar shape extending in a straight line. 3 to 7, all of the long-side wing parts 120b are exemplified as an example in which two and one short-side wing part 120a are provided, but the number of the short-side wing parts 120a and the long-side wing part 120b is required. may change according to When one short wing part 120a and two long wing parts 120b are provided, the rotation angle α between the two long wing parts 120b is, as illustrated in FIG. 4, the long wing part 120b. and the single wing portion 120a are disposed such that a rotation angle β is respectively formed (ie, α + 2β = 360°), and when viewed from a plan view, may have an arrangement of the same shape as the English letter Y as a whole. Each of these rotation angles α and β may be changed according to other conditions such as the shape of the floor of the inner space of the dishwasher, but it is preferable that at least β > 90°. The above description that the long-side wing portion 120b extends opposite to the short-side wing portion 120a means this. On the other hand, the long side wing portion (120b) is even provided with a pair with each of α rotation therebetween, one each of the long side wing portions (120b measured in the radial direction the length (L _S) that is exactly the opposite to the short side wings (120a) The length (L _L = L _R × cos(α/2)) of ) may also _{be greater than the radial length L S} of the single wing portion 120a (ie, (L _L > L _S )). On the other hand the length of the short side wing portion (120a) the radial length of a long side wing portions (120b) measured in the direction opposite to the (L _S) of the (L _L), the long side wing portions (120b) are one and one-sided blade portions (120a ) and in the case of extending in a straight line, _{it may be the radial length (L R} ) of the long side wing portion 120b as it is. That is, in this case, it can be _{(L L} = L _{R ).}

In this configuration, the distance to the farthest end in the radial direction, that is, the maximum radius with respect to the rotational axis of the first rotor 110 , is arranged in a straight line with one of the first rotor 110 and the long wing portion 120b. sometimes be a standing theory _(R L + d), the minimum radius of the first rotor 110 and the short-side blade portions (120a) has a case that is arranged to be superposed in a straight line may be an (L _S d). However, as described above, the maximum radius and the minimum radius may be limited to some extent according to a specific rotation ratio between the first rotor 110 and the second rotor 120 . An example of this is a schematic plan view of FIG. 6 . Here, the relative positions of the first rotor 110 and the second rotor 120 in the dishwasher 30 in the state of use of the rotor assembly for a dishwasher according to the present invention are based on the rotation angle of the first rotor 110 . is exemplified.

1) When the rotation angle of the first rotor 110 is 0 degrees

First, when the rotation angle of the first rotor 110 is 0 degrees, that is, the end of the second rotor 120 side of the first rotor 110 points in the 12 o'clock direction (upper side in the drawing direction) based on the plan view. 2 The leftmost diagram illustrates a state in which the ends of the short wing portions 120a of the rotor 120 are oriented in the same direction.

In this state, a distance (L _S + d) to the end of the second rotor end side wing portion (120a) of 120 from the axis of rotation of the first rotor 110, a long side wing portions (120b) in a direction opposite to this exact The distance to the end of is (L _L - d), and _{may have a relationship of (L S} + d) > (L _L - d) (see FIG. 5 ).

2) When the rotation angle of the first rotor 110 is 90 degrees

When the first rotor 110 rotates 90 degrees clockwise in the above state, the state is as shown in the second figure. In this process, the second rotor 120 rotates 180 degrees counterclockwise with respect to the first rotor 110, and as a result, the end of the single wing part 120a points in the 9 o'clock direction (the left side of the drawing direction). . Wherein a distance to the end of the short-side blade portions (120a) to the axis of rotation of the first rotor (110) (drawing direction based on the left end of the second rotor 120) in the direction (L _S d), but this is against The distance to the end of the long wing portion 120b (the right end of the second rotor 120 based on the drawing direction _{) becomes (L L} + d).

3) When the rotation angle of the first rotor 110 is 180 degrees

Again, if the first rotor 110 rotates 90 degrees and points to the 6 o'clock direction (lower side of the drawing direction), the second rotor 120 rotates again in the counterclockwise direction by 180 degrees in the meantime to rotate the single wing part 120a ) will point to 6 o'clock. Here, the distance to the tip of each wing of the second rotor 120 is symmetrically formed when the rotation angle of the first rotor 110 described above is 0 degrees.

4) When the rotation angle of the first rotor 110 is 270 degrees

When the first rotor 110 rotates further 90 degrees to point to the 9 o'clock direction, the second rotor 120 points to the 3 o'clock direction, where the distance to the tip of each wing of the second rotor 120 is the above-described method. 1 It is formed symmetrically with the case where the rotation angle of the rotor 110 is 90 degrees. Finally, when the first rotor 110 rotates further by 90 degrees to complete one rotation in the clockwise direction, the leftmost view, that is, the rotation angle of the first rotor 110 returns to a state of 0 degrees.

As described above, while the first rotor 110 rotates once clockwise, the second rotor 120 rotates counterclockwise twice with respect to the first rotor 110 , and counterclockwise with respect to the dishwasher 30 . This is equivalent to performing one rotation. Looking at the change in the position of the end of the second rotor 120 in the radial direction with respect to the rotation axis of the first rotor 110 in this process, the rotor assembly for a dishwasher according to the present invention is shown by a dotted line in FIG. ) can be covered. Drawing direction based on the horizontal direction the length of the zone (B) is 2 × corresponding to (L _L + d), and the vertical direction length is 2 × As bar, above which corresponds to the _{(L S + d) (L} L> If the _{relationship L S} ) is established, it can be a region similar to a rectangle with a horizontal length greater than a vertical length, more precisely, a rectangle with rounded corners. When comparing the area B with the area A of FIG. 2, the shape of the area is closer to a rectangle than a circle, and it can be seen that this is applicable to a dishwasher having a rectangular bottom shape. .

Meanwhile, in this configuration, the second rotor 120 has an eccentric rotation shaft with respect to the first rotor 110 , and the second rotor 120 also has the length of the short wing portion 120a and the long wing portion 120b. is different, an imbalance in weight distribution may result. Accordingly, for example, the counter weight may be disposed on the end of the first rotor 110 on the far side from the second rotor 120 , for example, on the end of the side where the first jet port 112 is shown in FIG. 3 . Similarly, in the case of the second rotor 120, a counter weight may be disposed on the short wing portion 120a. Such counterweights minimize vibration and centrifugal force bias in the rotation process of each rotor, and may help smooth rotation.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the protection scope of the present invention as long as it is apparent to those of ordinary skill in the art.

Claims (8)

A first rotor that is rotatably installed with respect to the floor of the inner space of the dishwasher;
a first gear coaxially rotating with the first rotor;
a second rotor rotatably installed with respect to the first rotor, the rotational axis of which is spaced apart from the rotational axis of the first rotor, and for ejecting water into the inner space of the dishwasher;
a second gear coaxially rotating with the second rotor;
and an intermediate gear meshed between the first gear and the second gear and rotatably installed with respect to the first rotor,
The second rotor includes a short wing portion extending with a relatively short radial length from the axis of rotation of the second rotor, and a long wing portion extending with a relatively long radius from the rotation shaft to the opposite side of the short wing portion,
Two of the long-side wing portions are provided to have a rotation angle α with each other to form a Y-shaped planar arrangement together with the short-side wing portion,
A rotor assembly for a dishwasher capable of ejecting water to a non-circular area through a combination of a relative rotation angle of the second rotor with respect to the first rotor. The rotor assembly of claim 1, wherein the non-circular region has a rectangular shape with rounded corners. The rotor assembly of claim 1, further comprising a counter weight installed on the first rotor. According to claim 1,
The first gear, the second gear, and the intermediate gear are all installed on a bottom surface of the first rotor to be accessible from the outside. According to claim 1,
The first rotor and the second rotor rotate in opposite directions,
A ratio of the rotation speed of the first rotor with respect to the dishwasher and the rotation speed of the second rotor with respect to the first rotor is 1:2. delete delete According to claim 1,
The rotor assembly for a dishwasher further comprising a counter weight installed on the single wing portion.

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