U.S. patent application number 17/613142 was filed with the patent office on 2022-07-07 for filter structure of dishwasher, and dishwasher.
This patent application is currently assigned to QINGDAO HAIER DISHWASHER CO., LTD.. The applicant listed for this patent is HAIER SMART HOME CO., LTD., QINGDAO HAIER DISHWASHER CO., LTD.. Invention is credited to Baozhen CHENG, Tao LI, Xiaolong LIN, Jintong WANG, Ke WANG.
Application Number | 20220211245 17/613142 |
Document ID | / |
Family ID | |
Filed Date | 2022-07-07 |
United States Patent
Application |
20220211245 |
Kind Code |
A1 |
LI; Tao ; et al. |
July 7, 2022 |
FILTER STRUCTURE OF DISHWASHER, AND DISHWASHER
Abstract
A filter structure of a dishwasher and a dishwasher, wherein the
filter structure of the dishwasher comprises a filter screen, the
filter screen comprises several first filter ribs and several
second filter ribs, and the second filter ribs and the first filter
ribs are arranged to cross each other so as to form a mesh
structure. The filter screen of the filter structure is a mesh
structure, which does not need post-perforation, thereby saving on
fabrication costs. The filter screen comprises a mesh structure
formed by the second filter ribs and the first filter ribs being
arranged to cross each other. Not only do the second filter ribs
and the first filter ribs enhance the strength of the filter
screen, but the mesh structure also prevents the occurrence of a
situation in which filter pores of a metal filter screen are
blocked by washing impurities.
Inventors: |
LI; Tao; (Qingdao, Shandong,
CN) ; WANG; Jintong; (Qingdao, Shandong, CN) ;
LIN; Xiaolong; (Qingdao, Shandong, CN) ; WANG;
Ke; (Qingdao, Shandong, CN) ; CHENG; Baozhen;
(Qingdao, Shandong, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
QINGDAO HAIER DISHWASHER CO., LTD.
HAIER SMART HOME CO., LTD. |
Qingdao, Shandong
Qingdao, Shandong |
|
CN
CN |
|
|
Assignee: |
QINGDAO HAIER DISHWASHER CO.,
LTD.
Qingdao, Shandong
CN
HAIER SMART HOME CO., LTD.
Qingdao, Shandong
CN
|
Appl. No.: |
17/613142 |
Filed: |
March 30, 2020 |
PCT Filed: |
March 30, 2020 |
PCT NO: |
PCT/CN2020/082020 |
371 Date: |
November 22, 2021 |
International
Class: |
A47L 15/42 20060101
A47L015/42 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 30, 2019 |
CN |
201910360202.X |
Claims
1. A filter structure of a dishwasher comprising a filter screen,
wherein, the filter screen comprises first filter ribs and second
filter ribs, the second filter ribs and the first filter ribs are
arranged to cross each other to form a mesh structure.
2. The filter structure of the dishwasher according to claim 1,
wherein, a second filter screen plane formed by the second filter
ribs is arranged under a first filter screen plane formed by the
first filter ribs.
3. The filter structure of the dishwasher according to claim 2,
wherein, a width of a second filter hole formed between two
adjacent the second filter ribs gradually increases from an upper
surface of the second filter ribs which are in contact with the
first filter rib to a lower surface of the second filter rib.
4. The filter structure of the dishwasher according to claim 2,
wherein, an upper surface of the first filter rib is a circular arc
surface or an inclined surface, or a fillet or a chamfer is
provided between the upper surface and a side of the first filter
rib; and/or, a width of a first filter hole formed between two
adjacent first filter ribs gradually increases from a lower surface
of the first filter rib which is in contact with the second filter
rib to the upper surface of the first filter rib.
5. The filter structure of the dishwasher according to claim 1,
wherein, the filter screen is an annular structure, and at least
parts of the first filter ribs extend towards an inner ring of the
filter screen; the filter screen includes at least two filter
zones, the first filter ribs in a first filter zone extend from an
outer ring of the filter screen to the inner ring of the filter
screen along a direction of water flow, and at least parts of the
first filter ribs in a second filter zone extend from the outer
ring of the filter screen to the inner ring of the filter screen
along the direction of water flow, and at least parts of the first
filter ribs in the second filter zone extend from the outer ring of
the filter screen to the first filter zone along the direction of
water flow; the first filter ribs in the first filter zone are
arranged parallel to each other; and the first filter ribs in the
second filter zone are arranged parallel to each other.
6. The filter structure of the dishwasher according to claim 5,
wherein, the filter screen includes one first filter zone and two
second filter zones, wherein the two second filter zones are
symmetrically arranged on two sides of the first filter zone.
7. A dishwasher, wherein the dishwasher comprises the filter
structure of the dishwasher according to claim 1.
8. The dishwasher according to claim 7, wherein, an inner tank is
provided, a bottom of the inner tank is recessed downwards to form
a groove, and the filter screen is installed in the groove; a side
wall of the groove extends obliquely, the filter screen is an
annular structure, and a side of an outer ring of the filter screen
extends obliquely and is coordinated with the side wall of the
groove; the side wall of the groove extends obliquely and downwards
from the bottom of the inner tank to a center of the groove; the
filter screen is recessed downwards from the outer ring to the
inner ring and forms a funnel shape.
9. The dishwasher according to claim 7, wherein, a bottom of the
outer ring of the filter screen is in line contact with the bottom
of the groove of the inner tank; a bottom surface of the outer ring
of the filter screen, which is in contact with the groove of the
inner tank, is an arc surface protruding towards the groove of the
inner tank.
10. The dishwasher according to claim 7, wherein, outlets for water
flow are provided between a bottom of the outer ring of the filter
screen and a bottom of the groove of the inner tank.
11. The filter structure of the dishwasher according to claim 2,
wherein the second filter ribs and the first filter ribs are
arranged to cross each other vertically and horizontally.
12. The filter structure of the dishwasher according to claim 2,
wherein the filter screen is integrally formed; and the filter
screen is a plastic filter screen.
13. The filter structure of the dishwasher according to claim 3,
wherein, two second sides, opposite to each other, of the second
filter hole are inclined to the lower surface of the second filter
rib and extend in opposite directions from each other, and a
distance between the two second sides gradually increases along a
direction to the lower surface; and the two second sides are
inclined to the lower surface of the second filter rib and extend
symmetrically.
14. The filter structure of the dishwasher according to claim 4,
wherein, two first sides, opposite to each other, of the first
filter hole are inclined to the upper surface of the first filter
rib and extend in opposite directions from each other, and a
distance between the two first sides gradually increases along a
direction to the upper surface; and the two first sides are
inclined to the upper surface of the first filter rib and extend
symmetrically.
15. The filter structure of the dishwasher according to claim 6,
wherein, the filter screen is an annular filter screen with a
fan-shaped gap, the inner ring of the filter screen is arranged in
a center of the annular filter screen, the first filter ribs in the
first filter zone are parallel to a symmetrical centerline of the
fan-shaped gap, and the first filter ribs in the second filter zone
are parallel to two sides of the fan-shaped gap.
16. The dishwasher according to claim 10, wherein, the bottom of
the outer ring of the filter screen comprises interval arranged
bulges, and recesses between two adjacent bulges form the outlets
for water flow passing; an end surface of the bulge, which is
coordinated with the bottom of the groove of the inner tank, is an
arc surface protruding towards the bottom of groove of the inner
tank.
Description
TECHNICAL FIELD
[0001] The disclosure herein relates to the technical field of
dishwashers, especially relates to a filter structure of a
dishwasher and a dishwasher.
BACKGROUND
[0002] In the prior art, a dishwasher includes a filter and a flat
filter screen. The flat filter screen of a traditional dishwasher
is usually made of metal, which leads to a higher cost of flat
filter screen. When the metal flat filter screen is installed on
the bottom of the inner tank in the dishwasher, extra parts are
needed to improve the compactness between the flat filter screen
and the bottom of the inner tank. That is to narrow the gap between
the flat filter screen and the bottom of the inner tank, so that to
avoid washing impurities getting into and remaining in the gap,
which leads to a further increase of the cost. In addition, the
metal flat filter screen usually has a porous structure. The filter
screen has the risk of being blocked by washing impurities due to
the small size of the pore.
[0003] Chinese patent with application number CN201710213330.2
discloses a dishwasher which comprises an inner tank and a water
tank. A part of the inner tank that connected with the water tank
is recessed downwards and forms a cylindrical shape, a flat filter
screen is arranged in a recess of the inner tank, and a support is
arranged between the flat filter screen and a bottom surface of the
recess for supporting the flat filter screen. A sealing ring is
arranged between an outer side of the recess and the water tank.
Parts are added between the flat filter screen and a bottom of the
inner tank in the dishwasher to improve the compactness between the
flat filter screen and the bottom of the inner tank, which lead to
a high cost and extreme complication of the installation of the
flat filter screen.
[0004] In view of this, the disclosure is proposed.
SUMMARY
[0005] In order to solve the technical problem above, the
disclosure provides a filter structure of a dishwasher and a
dishwasher.
[0006] To achieve this purpose, the disclosure adopts the following
technical scheme:
[0007] The first object of the disclosure is to provide a filter
structure of a dishwasher comprising a filter screen, the filter
screen comprises several first filter ribs and several second
filter ribs, and the second filter ribs and the first filter ribs
are arranged to cross each other so as to form a mesh
structure.
[0008] Further, a second filter screen plane formed by the second
filter ribs is arranged under a first filter screen plane formed by
the first filter ribs.
[0009] Preferably, the second filter ribs and the first filter ribs
are arranged to cross each other vertically and horizontally.
[0010] Preferably, the filter screen is integrally formed.
[0011] Preferably, the filter screen is plastic filter screen.
[0012] Further, a width of a second filter hole formed between two
adjacent second filter ribs gradually increases from an upper
surface of the second filter rib which is in contact with the first
filter rib to a lower surface of the second filter rib.
[0013] Preferably, two second sides, opposite to each other, of the
second filter hole are inclined to the lower surface of the second
filter rib and extend in opposite direction from each other, and a
distance between the two second sides gradually increases along a
direction to the lower surface.
[0014] More preferably, the two second sides are inclined to the
lower surface of the second filter rib and extend
symmetrically.
[0015] Further, an upper surface of the first filter rib is a
circular arc surface or inclined surface, or there is fillet or
chamfer between the upper surface and a side of the first filter
ribs.
[0016] And/or, a width of a first filter hole formed between two
adjacent first filter ribs gradually increases from a lower surface
of the first filter rib which is in contact with the second filter
rib to the upper surface of the first filter rib.
[0017] Preferably, two first sides, opposite to each other, of the
first filter hole are inclined to the upper surface of the first
filter rib and extend in opposite direction from each other, and a
distance between the two first sides gradually increases along a
direction to the upper surface.
[0018] Preferably, the two first sides are inclined to the upper
surface of the first filter rib and extend symmetrically.
[0019] Further, the filter screen has an annular structure, and at
least part of the first filter ribs extend towards an inner ring of
the filter screen.
[0020] Preferably, the filter screen includes at least two filter
zones, the first filter ribs in a first filter zone extend from an
outer ring of the filter screen to the inner ring of the filter
screen along a direction of water flow, and at least part of the
first filter ribs in a second filter zone extend from the outer
ring of the filter screen to the inner ring of the filter screen
along the direction of water flow, and at least some the first
filter ribs in the second filter zone extend from the outer ring of
the filter screen to the first filter zone along the direction of
water flow.
[0021] More preferably, the first filter ribs in the first filter
zone are arranged parallel to each other.
[0022] More preferably, the first filter ribs in the second filter
zone are arranged parallel to each other.
[0023] Further, the filter screen includes a first filter zone and
two second filter zones, the two second filter zones are
symmetrically arranged on two sides of the first filter zone.
[0024] The filter screen is an annular filter screen with a
fan-shaped gap, the inner ring of the filter screen is arranged in
center of the annular filter screen, the first filter ribs in the
first filter zone are parallel to a symmetrical centerline of the
fan-shaped gap, and the first filter ribs in the second filter zone
are parallel to two sides of the fan-shaped gap.
[0025] The second purpose of the disclosure is to provide a
dishwasher comprising a filter structure of a dishwasher, the
filter structure of a dishwasher comprises the filter screen above.
A water tank is provided under the filter screen, the filter screen
comprises several first filter ribs and several second filter ribs,
and the second filter ribs and the first filter ribs are arranged
to cross each other so as to form a mesh structure.
[0026] Further, the dishwasher comprises an inner tank, a bottom of
the inner tank is recessed downwards to form a groove, and the
filter screen is installed in the groove.
[0027] Preferably, a side wall of the groove extends obliquely, the
filter screen has an annular structure, and a side of an outer ring
of the filter screen extends obliquely and is coordinated with the
side wall of the groove.
[0028] More preferably, the side wall of the groove extends
obliquely and downwards from the bottom of the inner tank to a
center of the groove.
[0029] Preferably, the filter screen is recessed downwards from the
outer ring to the inner ring and forms a funnel shape.
[0030] Further, a bottom of the outer ring of the filter screen is
in line contact with the bottom of the groove of the inner
tank.
[0031] Preferably, a bottom surface of the outer ring of the filter
screen, which is in contact with the groove of the inner tank, is
an arc surface protruding towards the groove of the inner tank.
[0032] Further, several outlets for water flow passing are provided
between a bottom of the outer ring of the filter screen and a
bottom of the groove of the inner tank.
[0033] Preferably, the bottom of the outer ring of the filter
screen comprises several interval arranged bulges, and the recess
between two adjacent bulges forms the outlets for water flow
passing.
[0034] More preferably, an end surface of the bulge, which is
coordinated with the bottom of the groove of the inner tank, is an
arc surface protruding towards the bottom of groove of the inner
tank.
[0035] The disclosure has the following beneficial effects compared
with the prior art:
[0036] The filter screen of the disclosure comprises a mesh
structure formed by first filter ribs and second filter ribs
arranged to cross each other, the second filter ribs and the first
filter ribs are arranged to cross each other so that the strength
of the filter screen is enhanced, and the mesh structure avoids
being blocked by washing impurities like the filter pores of the
metal filter screen. The first filter ribs and the second filter
ribs are arranged to cross each other in two layers, which further
enhances the strength of the filter screen and prevents the filter
screen from being damaged. Two-layer crossed mesh structure has a
larger effective filter area than metal filter screen with filter
pores. The filter structure comprises an integrally formed plastic
filter screen, which saves cost compared with the metal filter
screen. The plastic filter screen can be integrally formed so that
post-perforation is not required, which saves the forming cost.
BRIEF DESCRIPTION OF THE DRAWINGS
[0037] As a part of the disclosure, the attached drawings are used
to provide a further understanding of the disclosure. The
embodiments and descriptions of the disclosure are used to explain
the disclosure and is not to be considered as improper limitation
of the disclosure. Obviously, the following drawings are only some
embodiments. For the person skilled in the art, other drawings can
be obtained according to these drawings without any creative
work.
[0038] In the attached figures:
[0039] FIG. 1 shows a diagram of a filter screen of the
disclosure;
[0040] FIG. 2 shows an installation diagram of the filter screen of
the disclosure;
[0041] FIG. 3 shows a partial view of the filter screen of the
disclosure;
[0042] FIG. 4 shows a side view of the filter screen of the
disclosure;
[0043] FIG. 5 shows an enlarged view of part A in FIG. 4;
[0044] FIG. 6 shows an enlarged partial sectional view of an outer
ring of the filter screen of the disclosure.
[0045] Each component is named as follows:
[0046] 1, filter screen; 11, outer ring; 111, bulge; 12, inner
ring; 13, first filter rib; 14, second filter rib; 15, hole; 2,
bottom of the inner tank; 21, groove; 3, filter.
[0047] It should be noted that these drawings and descriptions are
not to limit the conception of the disclosure in any way, but to
illustrate the concept of the disclosure for the person skilled in
the art by referring to specific embodiments.
DETAILED DESCRIPTION
[0048] The technical scheme in the following embodiments will then
be described clearly and completely in order to make the purpose,
technical scheme and advantages of the disclosure clearer. The
following embodiments are used to illustrate the disclosure but are
not used to limit the scope of the disclosure.
[0049] As illustrated in in FIGS. 1 to 6, the disclosure herein
provides a filter structure of a dishwasher which comprises a
filter screen 1. The filter screen 1 comprises several first filter
ribs 13 and several second filter ribs 14, and the second filter
ribs 14 and the first filter ribs 13 are arranged to cross each
other so as to form a mesh structure.
[0050] In the present disclosure, the filter screen 1 includes a
mesh structure formed by the second filter ribs 14 and the first
filter ribs 13 arranged to cross each other. The second filter ribs
14 and the first filter ribs 13 enhance the strength of the filter
screen 1, and the mesh structure avoids being blocked by washing
impurities like the filter pores of the metal filter screen 1.
Preferably, the filter screen 1 is integrally formed so that
post-perforation is not required, which saves the forming cost.
Preferably, the filter screen is plastic filter screen 1, which
saves cost compared with the metal filter screen 1. In the
disclosure, the filter structure of a dishwasher comprises the
filter screen 1, and the filter screen is a flat filter screen of a
dishwasher. The flat filter screen is not limited to a flat
plate-shaped filter screen, it can also be a curved filter screen
or an inclined filter screen.
Embodiment 1
[0051] In the embodiment, a second filter screen plane formed by
the second filter ribs 14 is arranged under a first filter screen
plane formed by the first filter ribs 13. The first filter ribs 13
and the second filter ribs 14 are arranged to cross each other in
two layers, so that the strength of the filter screen 1 is further
enhanced and the filter screen 1 is prevent from being damaged.
Two-layer crossed mesh structure has a larger effective filter area
than metal filter screen 1 with filter pores. And the two-layer
crossed mesh structure intercept and filter water flow twice, which
achieves better filtering effect and will not be blocked by washing
impurities. In addition, the second filter ribs 14 and the first
filter ribs 13 are arranged to cross each in two layers, which
makes it easier to collect residue so that the residue is easy to
remove, or makes it easy for the residue to enter a filter 3.
[0052] Preferably, the second filter ribs 14 and the first filter
ribs 13 are arranged to cross each other vertically and
horizontally. It avoids holes 15 of the filter screen 1 being
blocked by washing impurities and makes it easier for water flow
passing through. And the holes 15 formed by the first filter ribs
13 and the second filter ribs 14 arranged to cross each other
vertically and horizontally are uniform in size, which avoids being
partial blocked and hard to remove.
[0053] Preferably, the filter screen 1 is integrally formed so that
post-perforation is not required, which saves fabrication cost.
Preferably, the filter screen is plastic filter screen 1, which
saves cost compared with the metal filter screen 1.
Embodiment 2
[0054] On the basis of embodiment 1, in this embodiment, a width of
a second filter hole formed between two adjacent second filter ribs
14 gradually increases from an upper surface of the second filter
rib 14 which is in contact with the first filter rib 13 to a lower
surface of the second filter rib 14. Here, the first filter rib 13
and the upper surface of the second filter rib 14 which is in
contact with the first filter rib 13 realize the filtering. A
distance of the second filter hole from the upper surface of the
second filter rib to the lower surface of the second filter rib
does not affect the filtering effect and can guide water flow,
which represents a filter thickness of the whole filter screen is
reduced to a thickness of the first filter rib 13 and achieves a
good filtering effect. In addition, the strength of the filter
screen 1 can be enhanced by the combination of the second filter
ribs 14 and the first filter ribs 13. On the premise that the first
filter ribs 13 are as thin as possible, the strength is enhanced by
increasing a thickness of the second filter ribs 14. Two second
sides, opposite to each other, of the second filter hole are
inclined to the lower surface of the second filter rib 14 and
extend in opposite direction from each other, and a distance
between the two second sides gradually increases along a direction
to the lower surface. In this case, a main part of the second
filter rib 14 that coordinates with the first filter rib 13 to
realize the filtering is the upper surface of the second filter rib
14, which represents the filter thickness of the filter screen 1 in
the disclosure is reduced to the thickness of the first filter rib
13. Compared with filter screen with large thickness, it makes less
easy for washing impurities to block the hole 15, and the inclined
second sides makes it easier for water flow passing when water flow
passes through the second filter ribs 14. A distance between two
opposite second sides gradually increases along a direction to the
lower surface. The inclined second side of the second filter rib 14
cannot be seen when looking downwards from an upper side of the
first filter rib 13. The second side has no resistance to water
flow and can guide water flow flows downwards, and it enlarges the
space for water flow flowing downwards making it easier for water
flow flowing downwards. The second sides extend obliquely, which
can be integrated formed through draft molding so that to reduce
forming steps and avoid the requirement of post-processing.
Preferably, the two opposite second sides of the second filter hole
extend symmetrically to the lower surface of the second filter rib
14. And the forming is simple, which is more beneficial to the
flowing of water flow.
Embodiment 3
[0055] On the basis of above embodiments, in this embodiment, an
upper surface of the first filter rib 13 is a circular arc surface
or inclined surface, and/or, a width of a first filter hole formed
between two adjacent first filter ribs 13 gradually increases from
a lower surface of the first filter rib 13 which is in contact with
the second filter rib 14 to the upper surface of the first filter
rib 13. Preferably, two first sides, opposite to each other, of the
first filter hole are inclined to the upper surface of the first
filter rib 13 and extend in opposite direction from each other, and
a distance between the two first sides gradually increases along a
direction to the upper surface. The embodiment herein includes four
implementations: the upper surface of the first filter rib 13 is a
circular arc surface; the upper surface of the first filter rib 13
is an inclined surface; two opposite first sides of the first
filter hole are inclined to the upper surface of the first filter
rib 13 and extend in opposite direction from each other, and the
distance between the two first sides gradually increases along the
direction to the upper surface; and the upper surface of the first
filter rib 13 is a circular arc surface, two opposite first sides
of the first filter hole are inclined to the upper surface of the
first filter rib 13 and extend in opposite direction from each
other, and the distance between the two first sides gradually
increases along the direction to the upper surface. Another
implementation also included is that the upper surface of the first
filter rib 13 is an inclined surface, two opposite first sides of
the first filter hole are inclined to the upper surface of the
first filter rib 13 and extend in opposite direction from each
other, and the distance between the two first sides gradually
increases along the direction to the upper surface. Of course, it
also includes that the upper surface of the first filter rib 13 is
a flat surface with fillet or chamfer provided at the edge of the
flat surface and the combination of the flat surface with fillet or
chamfer and other implementations. Preferably, the two first sides
are inclined to the lower surface of the first filter rib 13 and
extend symmetrically.
[0056] The upper surface of the first filter rib 13 is a circular
arc surface or inclined surface, making it easy for water flow
flows downwards and avoiding the resistance to water flow for
flowing downwards if the upper surface was a flat surface. The
upper surface of the first filter rib 13 is a flat surface with
fillet or chamfer provided at the edge of the flat surface,
avoiding the accumulation of washing impurities that caught by
sharp edge, which would further block filter holes 15. Two opposite
first sides of the first filter hole are inclined to the lower
surface of the first filter rib 13 and extend in opposite
direction, which can also make it easy for water flow flowing and
will not cause the accumulation of washing impurities. And in
coordination with the inclined second filter rib 14, it further
reduces the filter thickness of the filter screen and provides a
better filtering effect.
Embodiment 4
[0057] On the basis of above embodiments, in this embodiment, the
filter screen 1 has an annular structure, and the filter structure
also includes a filter 3. Generally, the filter 3 is detachably
arranged at an inner ring 12 of the filter screen to fine filter
the water flow, or the filter 3 is rotatably arranged at the inner
ring 12 of the filter screen. For example, the filter 3 includes at
least two layers of filter parts. The filter 3 is installed at the
inner ring 12 of the filter screen, and at least some of the first
filter ribs 13 extends along a direction towards the filter 3
installed at the inner ring of the filter screen to guide the water
flow to the filter 3. A dishwasher is usually provided with a
filter screen 1, a filter 3 is provided at center of the filter
screen 1, and the filter screen 1 and the filter 3 both filter the
water flow. In the disclosure, the first filter rib 13 extends
towards the inner ring 12 of the filter screen so as to guide the
water flow to the filter 3 arranged at the inner ring 12.
[0058] The dishwasher includes an inner tank, a bottom of the inner
tank 2 is recessed downwards to form a groove 21, and the filter
screen 1 is installed in the groove 21. An opening is provided at a
bottom of the groove, and a water tank of the dishwasher is
connected with the opening. The filter screen 1 and the filter 3 is
provided to filter water in the dishwash, so that there is no large
washing impurity in the water flowing into the water tank, avoiding
adverse impact on other parts of waterway circulation. The bottom
of the inner tank 2 includes a water guiding surface that guide
water flow to the groove 21, and water guiding surface obliquely
extends downwards from the edge of the bottom of the inner tank to
the groove 21. Generally, the bottom of the inner tank in
dishwasher is a rectangle. Four water guiding surface is formed
from four edges of the rectangle to the groove 21 so as to make
forming easier. At least some of the first filter ribs 13 extend
along a water guiding direction of the water guiding surface, and
the first filter ribs 13 coordinate with the water guiding surface
to guide water flow to the filter 3. At least some of the first
filter ribs 13 extends towards the inner ring 12 of the filter
screen and also coordinates with the water guiding surface,
extending along the water guiding direction of the water guiding
surface.
[0059] A preferable implementation is that the filter screen 1
includes at least two filter zones, and the first filter ribs 13 in
a first filter zone extend from an outer ring 11 of the filter
screen to the inner ring 12 along a direction of water flow,
guiding water flow to the inner ring 12. The first filter ribs 13
in the first filter zone coordinate with the water guiding surface
and extend from the outer ring 11 of the filter screen to the inner
ring 12, guiding water flow to the inner ring 12. At least some of
the first filter ribs 13 in a second filter zone extend from the
outer ring 11 of the filter screen to the inner ring along the
direction of water flow, guiding water flow to the inner ring 12.
And at least some of the first filter ribs 13 in the second filter
zone extend from the outer ring 11 of the filter screen to the
first filter zone along water flow so as to guide water flow to the
first filter ribs 13, and then water flow is guided to the inner
ring 12 by a direction of the first filter ribs 13.
[0060] Specifically, the first filter ribs 13 in the first filter
zone are arranged parallel to each other, and the first filter ribs
13 in the second filter zone are arranged parallel to each other.
The second filter ribs 14 are arranged to cross the first filter
ribs 13 and under the first filter ribs 13 so as to form a mesh
structure. The second filter ribs 14 and the first filter ribs 13
are arranged to cross each other vertically and horizontally. The
filter screen 1 is divided into different filter zones so that the
holes 15 formed by the first filter ribs 13 and the second filter
ribs 14 are more uniform in size. It can prevent that if all of the
first filter ribs 13 were arranged towards the inner ring 12, the
size of the holes 15 may be different, resulting uneven filtering
effect.
[0061] A further implementation is that the filter screen 1
includes a first filter zone and two second filter zones, the two
second filter zones are symmetrically arranged on two sides of the
first filter zone, providing the advantage of simple structure and
easy to form. The first filter zone comprises two parts which are
arranged opposite to each other at two sides of the inner ring 12
of the filter screen. Two parts of the first filter zone
respectively coordinate with two water guiding surfaces at the
bottom of the inner tank and the second filter zones respectively
coordinate with other two water guiding surfaces at the bottom of
the inner tank, guiding water flow to the inner ring 12.
[0062] The filter screen 1 is an annular filter screen 1 with a
fan-shaped gap, the inner ring 12 is arranged in center of the
annular filter screen, the first filter ribs 13 in the first filter
zone are parallel to a symmetrical centerline of the fan-shaped
gap, and the first filter ribs 13 in the second filter zone are
parallel to two sides of the fan-shaped gap. In other words, there
are first filter ribs 13 arranged along three directions. It makes
it easy to gather washing impurities at the filter 3 and to arrange
the second filter ribs 14 so as to form filter holes 15 uniform in
size, achieving uniform filtering effect. And it can prevent that
when the first filter ribs 13 and the second filter ribs 14 are
arranged to cross each other vertically and horizontally, the
filter holes 15 formed by the first filter ribs 13 and the second
filter ribs 14 are different in size, resulting unstable filtering
effect. The first filter ribs 13 along three directions
respectively coordinate with different water guiding surfaces to
guide water flow.
[0063] Generally, the bottom of the inner tank in dishwasher
obliquely extends to the filter screen 1. A common way is that four
parts, divided by four edges of the bottom of the inner tank in
dishwasher, obliquely extends to the filter screen 1 respectively.
In this disclosure, the filter screen 1 coordinates with the bottom
of the inner tank in dishwasher and is provided with at least two
filter zones. Specifically, the direction of the first filter ribs
13 in each filter zone tends to guide water flow to the inner ring
of the filter screen 1. A preferable implementation is that the
filter zone of the disclosure coordinates with corresponding
inclined inner tank in dishwasher, and the whole slopes downwards
and to the inner ring of the filter screen. In other words, the
first filter zone arranged at two sides of the inner ring slopes
along different directions, the second filter zones arranged at two
sides of the first filter zone slope along different directions,
and the first filter zone and the second filter zones also slope
along different directions.
[0064] The filter screen 1 is recessed downwards from edge to the
inner ring 12 and forms a funnel shape so as to make it easy for
water flow to gather to the filter 3 at the inner ring and enter
the filter 3 to be filtered.
[0065] An indicating arrow is provided on the filter screen, and
the indicating arrow shows an installation direction of the filter
screen. The indicating arrow points to the filter and also shows an
approximate flowing direction of water flow. Preferably, the
indicating arrow is integrally formed above the filter screen.
Embodiment 5
[0066] The embodiment herein discloses a dishwasher comprising the
filter structure of a dishwasher described in above embodiments.
The filter structure of a dishwasher comprises the filter screen 1
and a water tank under the filter screen 1. The filter screen 1 is
an integrally formed plastic filter screen. The filter screen 1
includes several first filter ribs 13 and several second filter
ribs 14, and the second filter ribs 14 and the first filter ribs 13
are arranged to cross each other so as to form a mesh
structure.
[0067] Specifically, the water tank has a water inlet and a water
outlet connected from up to down, and the filter screen 1 is
arranged above the water inlet of the water tank. The filter screen
1 is an annular structure, and the filter 3 is installed in the
inner ring 12. The filter screen 1 is an integrally formed plastic
filter screen, saving cost compared to metal filter screen. And the
plastic filter screen can be integrally formed so that
post-perforation is not require, which saves the forming cost. The
filter screen 1 includes a mesh structure formed by the second
filter ribs 14 and the first filter ribs 13 arranged to cross each
other, the second filter ribs 14 and the first filter ribs 13
enhance the strength of the filter screen and the mesh structure
avoids being blocked by washing impurities like the filter pores of
the metal filter screen. Preferably, the second filter ribs 14 are
arranged to cross the first filter ribs 13 and under the first
filter ribs 13 so as to form the mesh structure. The first filter
ribs 13 and the second filter ribs 14 are arranged to cross each
other in two layers, which further enhances the strength of the
filter screen 1 and prevents the filter screen 1 from being
damaged. Also, two-layer crossed mesh structure has a larger
effective filter area than metal filter screen with filter pores.
And the two-layer crossed mesh structure intercept and filter water
flow twice, which achieves better filtering effect and will not be
blocked by washing impurities. In addition, the second filter ribs
14 and the first filter ribs 13 are arranged to cross each in two
layers, which makes it easier to collect residue so that the
residue is easy to remove, or makes it easy for the residue to
enter a filter 3. More preferably, the second filter ribs 14 and
the first filter ribs 13 are arranged to cross each other
vertically and horizontally. It avoids holes 15 of the filter
screen being blocked by washing impurities and makes it easier for
water flow passing through. And the holes 15 formed by the first
filter ribs 13 and the second filter ribs 14 arranged to cross each
other vertically and horizontally are uniform in size, which avoids
being partial blocked and hard to remove.
[0068] The filter screen 1 is a flat filter screen of a dishwasher.
The flat filter screen is not limited to a flat plate-shaped filter
screen, it can also be a curved filter screen or an inclined filter
screen. In this disclosure, the filter screen 1 is recessed
downwards from the outer ring to the inner ring 12 and forms a
funnel shape so as to make it easy for water flow to gather to the
filter 3 at the inner ring and enter the filter 3 to be
filtered.
Embodiment 6
[0069] On the basis of embodiment 5, the dishwasher also includes
an inner tank. A bottom of the inner tank recessed downwards to
form a groove 21, and the filter screen 1 is installed in the
groove 21. The groove 21 is provided with an opening, and the water
inlet of the water tank is connected with the groove 21 through the
opening. The filter screen 1 is an annular structure, and the
filter screen 1 is recessed from the outer ring 11 to the inner
ring 12 and forms a funnel shape. Preferably, a side wall of the
groove extends obliquely, and a side of an outer ring of the filter
screen extends obliquely and is coordinated with the side wall of
the groove. The side wall of the groove and the side of the outer
ring have high compactness, resulting a small distance between the
groove 21 and the outer ring of the filter screen, which further
filters out washing impurities and prevents washing impurities from
enter a space between the groove 21 and the outer ring 11 of the
filter screen. Generally, the side wall of the groove 21 extends
obliquely and the outer ring of the filter screen extends
vertically. A distance between an upper end of the side wall of the
groove 21 and the outer ring of the filter screen is larger than a
lower end of the side wall of the groove 21 and the outer ring of
the filter screen, so that a sealing part is required to seal the
outer ring of the filter screen and the groove 21. In contrast,
according to the disclosure herein, the side of the outer ring 11
of the filter screen coordinates with the side wall of the groove
21 to extend obliquely. The side of the outer ring and the side
wall of the groove are arranged similar in profile so as to achieve
a high compactness. More preferably, the side wall of the groove 21
extends obliquely and downwards from the bottom of the inner tank 2
to a center of the groove 21 so as to make forming easy and make
installation and disassembling convenient.
Embodiment 7
[0070] On the basis of above embodiments, a bottom of the outer
ring 11 of the filter screen in this embodiment is in line contact
with the bottom of the groove 21 of the inner tank, making
coordination of the two more stable. It prevents large contact
range when the two are in surface contact which results in large
coordination range and then results in unstable installation. A
bottom surface of the outer ring 11 of the filter screen, which is
in contact with the groove 21 of the inner tank, is an arc surface
protruding towards the groove of the inner tank. The arc surface is
in line contact with the bottom of the groove 21 of the inner tank,
making coordination of the two more stable and preventing unstable
installation if the two were in surface contact. There are no sharp
edges on the arc surface so as to prevent the groove 21 of the
inner tank from being scratching by the sharp edges, avoiding
scratching the groove 21 of the inner tank.
Embodiment 8
[0071] On the basis of above embodiments, in this embodiment,
several outlets for water flow passing are provided between a
bottom of the outer ring 11 of the filter screen and a bottom of
the groove 21 of the inner tank, avoiding accumulation of water
flow that enters from the space between a side of the outer ring 11
of the filter screen and a side of the groove 21. Preferably, the
bottom of the outer ring 11 of the filter screen comprises several
interval arranged bulges 111, and the recess between two adjacent
bulges 111 forms the outlets for water flow passing. The interval
arranged bulges 111 form a sawtooth shape, making the outflow of
water flow easy and avoiding water flow accumulating between the
groove 21 of the inner tank and the filter screen 1. More
preferably, an end surface of the bulge 111, which is coordinated
with the bottom of the groove 21 of the inner tank, is an arc
surface protruding towards the bottom of groove of the inner tank.
The arc surface is in line contact with the bottom of the groove 21
of the inner tank, making coordination of the two more stable and
preventing unstable installation if the two were in surface
contact. There are no sharp edges on the arc surface so as to
prevent the groove 21 of the inner tank from being scratching by
the sharp edges, avoiding scratching the groove 21 of the inner
tank.
[0072] The above description is just used to illustrate some more
practical embodiments of the disclosure but is not the limitation
of the disclosure in any way. Although the disclosure has been
enclosed as the above embodiments, they are not used to limit the
disclosure. Within the technical scheme of the disclosure, any
person skilled in the art should be able to make some changes or
modifications based on the above techniques to obtain other
embodiments with equal benefits. But any simple changes, equivalent
changes or modifications, made to the above embodiments according
to the technical substance within the technical scheme of the
disclosure, still belong to the protection range of the
disclosure.
* * * * *