CN107788931B - Base cover for dish washing machine and dish washing machine - Google Patents

Base cover for dish washing machine and dish washing machine Download PDF

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Publication number
CN107788931B
CN107788931B CN201711194271.5A CN201711194271A CN107788931B CN 107788931 B CN107788931 B CN 107788931B CN 201711194271 A CN201711194271 A CN 201711194271A CN 107788931 B CN107788931 B CN 107788931B
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CN
China
Prior art keywords
side plate
base
coaming
cover
dishwasher
Prior art date
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Active
Application number
CN201711194271.5A
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Chinese (zh)
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CN107788931A (en
Inventor
刘民勇
雷发桂
付安东
乌守保
许平平
仇灿华
辛载奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Original Assignee
Midea Group Co Ltd
Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201711194271.5A priority Critical patent/CN107788931B/en
Publication of CN107788931A publication Critical patent/CN107788931A/en
Application granted granted Critical
Publication of CN107788931B publication Critical patent/CN107788931B/en
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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4251Details of the casing

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  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

The invention discloses a base cover for a dish washer and the dish washer, wherein the base cover for the dish washer comprises a coaming and a bottom cover, the coaming is an integral piece and is suitable for being matched with a base of the dish washer in a clamping way, the bottom cover is arranged at the lower end of the coaming, and the bottom cover and the coaming jointly define a surrounding and blocking space so as to block a water cup and a washing pump of the dish washer in the surrounding and blocking space. According to the base cover for the dish washing machine, the coaming is arranged into the integral piece, and the coaming can be matched with the base of the dish washing machine in a clamping mode, so that a user can directly clamp the coaming with the base of the dish washing machine in the assembling process, the base cover can be conveniently and integrally fixed, parts such as a water cup and a washing pump can be shielded and protected, and meanwhile, the coaming can be conveniently assembled and disassembled by the user and timely maintained, so that the cost is reduced, and the user experience is improved.

Description

Base cover for dish washing machine and dish washing machine
Technical Field
The invention relates to the technical field of kitchen washing appliances, in particular to a base cover for a dish washer and the dish washer.
Background
In the related art, the pedestal cover of the dish washer is of a split structure, each side plate needs to be connected with the lower part of the water tank of the dish washer during assembly, and the pedestal cover is fastened through screws, so that the pedestal cover is inconvenient to install, has a complex structure and is high in manufacturing cost.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the base cover of the dish washer, which has the advantages of simple structure, convenient assembly and disassembly, low manufacturing cost and good user experience.
The invention also provides a dish washer with the base cover for the dish washer.
A base cover for a dishwasher according to an embodiment of a first aspect of the present invention includes: the coaming is an integral piece and is suitable for being matched with the pedestal of the dish washer in a clamping way; the bottom cover is arranged at the lower end of the coaming, and the bottom cover and the coaming jointly define a baffle space so as to shield the water cup and the washing pump of the dish washer in the baffle space.
According to the base cover for the dish washing machine, the coaming is arranged into the integral piece, and the coaming can be matched with the base of the dish washing machine in a clamping mode, so that a user can directly clamp the coaming with the base of the dish washing machine in the assembling process, the base cover can be conveniently and integrally fixed, parts such as a water cup and a washing pump can be shielded and protected, and meanwhile, the coaming can be conveniently assembled and disassembled by the user and timely maintained, so that the cost is reduced, and the user experience is improved.
According to some embodiments of the invention, the coaming comprises a left side plate, a right side plate, and a front side plate, the left side plate and the right side plate being arranged in spaced apart relation, a left edge of the front side plate being connected to a front edge of the left side plate and a right edge of the front side plate being connected to a front edge of the right side plate.
According to some examples of the invention, a first buckle or a first clamping groove is respectively arranged on the rear edge of the left side plate and the rear edge of the right side plate.
According to some examples of the present invention, the left side plate and the right side plate are respectively provided with a plurality of first buckles, and the plurality of first buckles are respectively arranged at intervals along the length direction of the rear edge of the left side plate and the length direction of the rear edge of the right side plate.
According to some examples of the invention, at least one of the left side plate and the right side plate is further provided with a first screw hole adapted to be bolted to the base.
According to some examples of the invention, the front side plate is provided with a plurality of second screw holes which are arranged at intervals, and the coaming is connected with the lower end of the liner of the dish washer through the second screw holes.
According to some examples of the invention, the length of the right side plate in the front-rear direction is greater than the length of the left side plate in the front-rear direction, and the length of the bottom cover in the front-rear direction is greater than the length of the right side plate in the front-rear direction.
According to some embodiments of the invention, the bottom cover is integrally formed with the shroud.
According to some embodiments of the invention, the rear edge of the bottom cover is provided with a plurality of second buckles or a plurality of second clamping grooves which are suitable for being clamped with the base, and the second buckles or the second clamping grooves are arranged at intervals along the length direction of the rear edge of the bottom cover.
A dishwasher according to an embodiment of a second aspect of the present invention includes a tub; the base is arranged at the bottom end of the inner container; the water cup and the washing pump are arranged on the outer bottom surface of the inner container; a base cover for a dishwasher according to an embodiment of the present invention.
The dish washer according to the embodiment of the invention has the characteristics of simple structure, convenient assembly and disassembly, low manufacturing cost and the like by adopting the base cover for the dish washer according to the embodiment of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a partial view of a dishwasher according to an embodiment of the present invention;
FIG. 2 is a partial view of yet another perspective of a dishwasher according to an embodiment of the present invention;
FIG. 3 is a bottom view of a dishwasher according to an embodiment of the present invention;
FIG. 4 is a schematic view of the assembly and disassembly of a base cover of a dishwasher according to an embodiment of the present invention;
FIG. 5 is a schematic view of a base cover of a dishwasher according to an embodiment of the present invention in further assembly and disassembly with the dishwasher;
reference numerals:
a dishwasher 100;
an inner container 10;
a shroud 20; a first clasp 21; a first screw hole 22; a second screw hole 23;
a base 30; a clip 31 (33); a bottom cover 40; and a second catch 41.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
A sump cover for a dishwasher according to an embodiment of the first aspect of the present invention, the dishwasher 100 may be a tub-type dishwasher, will be described below with reference to the accompanying drawings.
As shown in fig. 1-5, a base cover for a dishwasher according to one embodiment of the present invention includes a shroud 20 and a bottom cover 40.
The enclosing plate 20 is an integral part, for example, the enclosing plate 20 can be formed into a U-shaped structure, thus being convenient for processing and forming, reducing the manufacturing cost, the enclosing plate 20 and the base 30 of the dish washer 100 can be in clamping fit, the bottom cover 40 is arranged at the lower end of the enclosing plate 20, for example, the enclosing plate 20 and the bottom cover 40 can be assembled parts fixedly connected or can be integrally formed into an integral part, therefore, hu Wei baffle space can be jointly limited by the bottom cover 40 and the enclosing plate 20, thereby shielding the parts such as a water cup and a washing pump of the dish washer 100 in the enclosure space, realizing the protection effect on the parts of the dish washer 100, ensuring the appearance effect, and being convenient for assembling, disassembling and timely maintenance by adopting the clamping fit of the enclosing plate 20 and the base 30 of the integral part.
Therefore, according to the base cover for the dish washer, the coaming 20 is arranged as an integral piece, and the coaming 20 can be matched with the base 30 of the dish washer 100 in a clamping way, so that a user can directly clamp the coaming 20 with the base 30 of the dish washer 100 in assembly, the base cover can be conveniently and integrally fixed, parts such as a water cup and a washing pump can be shielded and protected, and meanwhile, the coaming 20 can be conveniently assembled and disassembled by the user and timely maintained, so that the cost is reduced, and the user experience is improved.
As shown in fig. 1 and 4, in some embodiments of the present invention, the coaming 20 includes a left side plate, a right side plate, and a front side plate, the left side plate and the right side plate being disposed at a distance in a left-right direction, a left side edge of the front side plate being connected to a front edge of the left side plate, and a right side edge of the front side plate being connected to a front edge of the left side plate, such that a surrounding space is formed by the left side plate, the right side plate, and the front side plate respectively connected to the left side plate and the right side plate, so that a water cup, a washing pump, etc. of the dishwasher 100 are installed therein, thereby achieving shielding, protecting, and securing an overall appearance effect.
As shown in fig. 1, 2, 4 and 5, in some embodiments of the present invention, the rear edge of the left side plate and the rear edge of the right side plate are respectively provided with a first buckle 21 or a first slot, in other words, the rear edge of the left side plate is provided with the first buckle 21, while the rear edge of the right side plate is provided with the first buckle 21 (as shown in fig. 4), or the rear edge of the left side plate is provided with the first buckle 21, while the rear edge of the right side plate is provided with the first slot, or the rear edge of the left side plate is provided with the first slot, while the rear edge of the right side plate is provided with the first slot.
In an alternative example of the present invention, the left side plate and the right side plate are provided with a plurality of first buckles 21, and the plurality of first buckles 21 may be respectively arranged at intervals along the length direction of the rear extension of the left side plate (the up-down direction in the example shown in fig. 1) and the length direction of the rear extension of the right side plate, so that the plurality of first buckles 21 may be connected with the base 30 of the dishwasher 100 in a clamping manner, thereby ensuring the reliability of the assembly connection between the base cover and the base 30 of the dishwasher 100.
As shown in fig. 1 and 4, in some embodiments of the present invention, at least one of the left side plate and the right side plate has a first screw hole 22, for example, in the example shown in fig. 4, the left side plate is provided with the first screw hole 22 adjacent to the first bayonet, and the base cover is screwed with the base 30 of the dishwasher 100 through the first screw hole 22 to further secure connection reliability.
As shown in fig. 1 and 4, in some embodiments of the present invention, a plurality of second screw holes 23 may be provided near the upper edge of the front side plate, for example, in the example shown in fig. 1, two second screw holes 23 are provided, and the upper portion of the front side plate is provided at a distance in the left-right direction, and the shroud 20 is fastened to the lower end of the inner tub 10 of the dishwasher 100 through the second screw holes 23, thereby further securing the reliability of the assembly between the components of the dishwasher 100.
As shown in fig. 4 and 5, in some examples of the present invention, the length of the right side plate in the front-rear direction is greater than the length of the left side plate in the front-rear direction, and at the same time, the length of the bottom cover 40 coupled to the surrounding plate 20 in the front-rear direction is greater than the length of the right side plate in the front-rear direction, so that the assembly of the bottom cover with the bottom base 30 of the dishwasher 100 can be facilitated, and the convenience of assembly and disassembly can be improved.
In some embodiments of the invention, the shroud 20 is integrally formed with the bottom cover 40. Therefore, the integral structural strength of the base cover can be further ensured, and the integral maintenance and assembly and disassembly are convenient.
As shown in fig. 1, 3 and 5, in some embodiments of the present invention, the rear edge of the bottom cover 40 is provided with a plurality of second hooks 41 or a plurality of second locking grooves, for example, the rear edge of the bottom cover 40 may be provided with two second hooks 41 (as illustrated in fig. 5), or may be provided with one second hook 41 and one second locking groove, and the plurality of second hooks 41 or the second locking grooves are spaced apart along the length direction (left-right direction as illustrated in fig. 1) of the rear edge of the base 30, thereby securing the fastening connection between the bottom cover 40 and the base 30 of the dishwasher 100 through the locking engagement, thereby securing the reliability of the connection of the base cover and the base 30.
An assembling process of a base cover for a dish washer according to an embodiment of the present invention will be described with reference to fig. 1 to 5.
The base cover for a dishwasher according to an embodiment of the present invention includes a surrounding plate 20 and a bottom cover 40, the surrounding plate 20 includes a left side plate, a right side plate and a front side plate, the rear edge of the left side plate and the rear edge of the right side plate are respectively provided with a first buckle 21, the upper portion of the front side plate is provided with two second screw holes 23 spaced apart and arranged and the rear edge of the left side plate is provided with a first screw hole 22 adjacent thereto, and the rear edge of the bottom cover 40 is provided with two second buckles 41 spaced apart and arranged.
During installation, the first buckle 21 of the right side plate is clamped on the clamping block 31 of the base 30, the second buckle 41 of the bottom cover 40 is aligned and clamped with the clamping block 33 of the base 30, the first buckle 21 of the left side plate is installed, and finally three fastening screws are respectively connected to the first screw hole 22 and the second screw hole 23, so that the rapid installation of the base cover is completed;
when the water tank is disassembled, the three screws of the front side plate and the left side plate are firstly disassembled, then the first buckle 21 of the left side plate is disassembled, the edge position of the left base cover is grasped to pull the left base cover backwards, the second buckle 41 of the bottom cover 40 can be disassembled, and finally the whole base cover is disassembled, so that the water tank bottom part is convenient to maintain.
The dishwasher 100 according to the embodiment of the second aspect of the present invention includes a tub 10, a sump 30, a cup and a wash pump, and a sump cover for the dishwasher according to the embodiment of the present invention.
The base 30 is arranged at the bottom end of the liner 10, the water cup and the washing pump are respectively arranged at the outer bottom surface of the liner 10, the base cover is connected with the base 30 in a clamping way, and the water cup and the washing pump are shielded in the enclosure space, so that the protection effect can be achieved, and the appearance effect can be ensured.
The dishwasher 100 according to the embodiment of the present invention has the characteristics of simple structure, convenient assembly and disassembly, low manufacturing cost, etc., by adopting the base cover for the dishwasher according to the above-described embodiment of the present invention.
Other constructions and operations of a base cover for a dishwasher and a dishwasher 100 according to an embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A base cover for a dishwasher, comprising:
the coaming is an integral piece and is suitable for being matched with the pedestal of the dish washer in a clamping way;
the bottom cover is arranged at the lower end of the coaming, and the bottom cover and the coaming together define a retaining space so as to cover a water cup and a washing pump of the dish washer in the retaining space; the coaming comprises a left side plate, a right side plate and a front side plate, wherein the left side plate and the right side plate are arranged at intervals, the left side edge of the front side plate is connected with the front edge of the left side plate, and the right side edge of the front side plate is connected with the front edge of the right side plate; the rear edge of the bottom cover is provided with a plurality of second buckles or a plurality of second clamping grooves which are suitable for being clamped with the base, and the second buckles or the second clamping grooves are arranged at intervals along the length direction of the rear edge of the bottom cover.
2. The base cover for a dishwasher of claim 1, wherein the rear edge of the left side plate and the rear edge of the right side plate are provided with a first buckle or a first clamping groove, respectively.
3. The base cover for a dishwasher according to claim 2, wherein a plurality of the first hooks are provided on the left and right side plates, respectively, and the plurality of the first hooks are arranged at intervals along a length direction of the rear edge of the left side plate and a length direction of the rear edge of the right side plate, respectively.
4. The base cover for a dishwasher of claim 2, wherein at least one of the left and right side plates is further provided with a first screw hole adapted to be bolted to the base.
5. The base cover for a dishwasher of claim 2, wherein the front side plate is provided with a plurality of second screw holes arranged at intervals, and the coaming is connected with the lower end of the inner container of the dishwasher through the second screw holes.
6. The base cover for a dishwasher of claim 1, wherein the length of the right side plate in the front-rear direction is greater than the length of the left side plate in the front-rear direction, and the length of the bottom cover in the front-rear direction is greater than the length of the right side plate in the front-rear direction.
7. The base cover for a dishwasher of any one of claims 1-6, wherein the bottom cover is integrally formed with the shroud.
8. A dishwasher, comprising:
an inner container;
the base is arranged at the bottom end of the inner container;
the water cup and the washing pump are arranged on the outer bottom surface of the inner container;
the base cover for a dishwasher of any one of claims 1-7.
CN201711194271.5A 2017-11-24 2017-11-24 Base cover for dish washing machine and dish washing machine Active CN107788931B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711194271.5A CN107788931B (en) 2017-11-24 2017-11-24 Base cover for dish washing machine and dish washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711194271.5A CN107788931B (en) 2017-11-24 2017-11-24 Base cover for dish washing machine and dish washing machine

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Publication Number Publication Date
CN107788931A CN107788931A (en) 2018-03-13
CN107788931B true CN107788931B (en) 2023-10-03

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107788931B (en) * 2017-11-24 2023-10-03 佛山市顺德区美的洗涤电器制造有限公司 Base cover for dish washing machine and dish washing machine
CN108618729B (en) * 2018-06-13 2023-09-15 珠海格力电器股份有限公司 Mounting structure of dish washer washing motor and dish washer
CN109288473A (en) * 2018-11-06 2019-02-01 佛山市顺德区美的洗涤电器制造有限公司 Water basin dish-washing machine
CN111358406A (en) * 2018-12-26 2020-07-03 佛山市顺德区美的洗涤电器制造有限公司 Household electrical appliance
CN111481142B (en) * 2019-01-25 2024-03-29 青岛海尔洗碗机有限公司 Dish washer with overflow protection architecture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103762770A (en) * 2014-02-12 2014-04-30 青岛汇智机器人有限公司 Robot servo motor outer cover
CN104132447A (en) * 2013-05-03 2014-11-05 珠海格力电器股份有限公司 Air conditioner base and air conditioner with same
CN205697338U (en) * 2016-04-21 2016-11-23 广东小熊电器有限公司 Washable egg McMuffin quick cooker
CN107137044A (en) * 2017-06-19 2017-09-08 广东格兰仕集团有限公司 A kind of casing fixed connection structure of dish-washing machine
CN107788931A (en) * 2017-11-24 2018-03-13 佛山市顺德区美的洗涤电器制造有限公司 Base cover and dish-washing machine for dish-washing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104132447A (en) * 2013-05-03 2014-11-05 珠海格力电器股份有限公司 Air conditioner base and air conditioner with same
CN103762770A (en) * 2014-02-12 2014-04-30 青岛汇智机器人有限公司 Robot servo motor outer cover
CN205697338U (en) * 2016-04-21 2016-11-23 广东小熊电器有限公司 Washable egg McMuffin quick cooker
CN107137044A (en) * 2017-06-19 2017-09-08 广东格兰仕集团有限公司 A kind of casing fixed connection structure of dish-washing machine
CN107788931A (en) * 2017-11-24 2018-03-13 佛山市顺德区美的洗涤电器制造有限公司 Base cover and dish-washing machine for dish-washing machine

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