WO2019091666A1

WO2019091666A1 - A dishwasher

Info

Publication number: WO2019091666A1
Application number: PCT/EP2018/076835
Authority: WO
Inventors: Yusuf Koc; Mert PATKAVAK; Erkan BASTAN
Original assignee: Arcelik Anonim Sirketi
Priority date: 2017-11-08
Filing date: 2018-10-02
Publication date: 2019-05-16
Also published as: TR201717501A2

Abstract

The present invention relates to a dishwasher (1) comprising a body (2); a washing tub (3) that is arranged in the body (2) and wherein the washing process is realized; at least one rack (4) that is arranged in the washing tub (3) and wherein the dishes are placed to be washed; at least one spray arm (5) that is arranged in the vicinity of the rack (4) and that provides the delivery of water into the washing tub (3), and a plurality of nozzles (6) that are provided on the spray arm (5) and that enable the water received from the nozzle (5) to be pressurized and sprayed onto the dishes.

Description

A DISHWASHER

The present invention relates to a dishwasher with improved washing efficiency.

As is known, dishwashers generally comprise upper and lower racks which are placed in the washing tub and wherein the kitchenware to be washed are placed. Each rack can be moved out of the washing tub so as to enable the dishes to be placed into the rack or taken out of the rack. Under each rack a spray arm, connected to the water line, is disposed, that rotates and sprays water onto the items placed on the rack. The washing process is realized by spraying the water received from the main delivery line onto the dishes by means of the spray arms. The spraying elements provided on the spray arm enable the water to be sprayed onto the dishes at a certain pressure. Thus, the dishes are enabled to be cleaned. In the washing step, the water is sent onto the dishes at a higher pressure in order to remove the dirt on the dishes. In the rinsing step, the water is delivered to the spray arms at a lower pressure in order to prevent the dirt removed from the dishes from sticking again onto the dishes. The water pressure is adjusted by means of a circulation pump. However, the water received from the mains being sprayed through the same nozzles in the washing and rinsing steps causes the flow rates of the water in said steps to be close to each other. Consequently, the dirt and detergent residues stick again onto the dishes in the rinsing step, and the washing and rinsing performances decrease.

In the state of the art European Patent Application No. EP2601878, a dishwasher is disclosed, comprising a spray arm that enables the water to be sprayed through different nozzles.

The aim of the present invention is the realization of a dishwasher with improved washing efficiency.

The dishwasher realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a body and a washing tub disposed in the body and wherein the washing process is realized. At least one rack whereon the dishes are placed and at least one spray arm that is positioned in the vicinity of the rack and that enables the water to be delivered into the washing tub are provided in the washing tub. A plurality of nozzles that enable the water to be sprayed onto the dishes are provided on the spray arm. The water transferred from the mains to the body is delivered into the washing tub by means of the spray arms and sprayed by nozzles onto the dishes placed into the washing tub.

The dishwasher of the present invention comprises the spray arm that enables the water to be delivered to different nozzles in the washing and rinsing steps. By spraying the water through different nozzles in the washing and rinsing steps, the pressure of the water sprayed onto the dishes can be controlled.

In an embodiment of the present invention, the dishwasher comprises a connection element that enables the spray arm to be connected to the water line, and a first duct and a second duct that are provided on the spray arm. A plurality of rinsing nozzles that enable the water to be delivered to the washing tub in the rinsing step are provided on the first duct. A plurality of washing nozzles that enable the water to be delivered to the washing tub in the washing step are provided on the second duct. A first closure member is provided at the part of the connection element opening into the first duct and a second closure member at the part thereof opening to the second duct. The water delivered to the first duct and the second duct is controlled by means of the first closure member and the second closure member.

In an embodiment of the present invention, the dishwasher comprises the first closure member that has a spring that enables the same to be fixed to the connection element and a headpiece that enables the water delivery to the first duct to be controlled. The spring can be stretched and compressed with the water pressure. Thus, the headpiece is enabled to be moved up and down.

In an embodiment of the present invention, the dishwasher comprises the second closure member having a mouth portion that can be opened/closed with the water pressure. When the water pressure is high, the mouth portion of the second closure member opens and allows the passage of water.

In an embodiment of the present invention, the dishwasher comprises the second closure member produced from elastomeric material.

In an embodiment of the present invention, the dishwasher comprises a housing that is provided on the connection element and an opening that opens from the connection element into the first duct. The second closure member is fixed onto the housing. The opening can be closed by means of the headpiece.

In an embodiment of the present invention, the dishwasher comprises the spray arm that has a first position wherein the headpiece moves upwards and closes the opening when the spring is stretched with the pressure of the water delivered in the washing process, and a second position wherein the mouth portion of the second closure member is not opened and the water transferred to the spray arm is delivered into the washing tub only through the first duct.

In an embodiment of the present invention, the dishwasher comprises the spray arm that has the washing nozzle that enables the dirt on the dishes to be disintegrated and the rinsing nozzle that enables the dirt and detergent residues on the dishes to be removed.

In an embodiment of the present invention, the diameter of the rinsing nozzle is smaller than that of the washing nozzle.

A dishwasher realized in order to attain the aim of the present invention is illustrated in the attached figures, where:

Figure 1 - is the perspective view of the dishwasher.

Figure 2 - the schematic view of the spray arm in the first position.

Figure 3 - the schematic view of the spray arm in the second position.

Figure 4 - is the perspective view of the spray arm.

Figure 5 - is the top cross-sectional view of the spray arm.

The elements illustrated in the figures are numbered as follows:

Dishwasher
Body
Washing tub
Rack
Spray arm
Nozzle
6a - rinsing nozzle
6b - washing nozzle
Connection element
First duct
Second duct
First closure member
Second closure member
Spring
Headpiece
Mouth portion
Housing
Opening
A. First position
B. Second position

The dishwasher (1) comprises a body (2); a washing tub (3) that is arranged in the body (2) and wherein the washing process is realized; at least one rack (4) that is arranged in the washing tub (3) and wherein the dishes are placed to be washed; at least one spray arm (5) that is arranged in the vicinity of the rack (4) and that provides the delivery of water into the washing tub (3), and a plurality of nozzles (6) that are provided on the spray arm (5) and that enable the water received from the nozzle (5) to be pressurized and sprayed onto the dishes. By means of the spray arm (5), the water is sprayed onto the dishes placed in the rack (4). By means of the nozzles (6) provided on the spray arm (5), the water is delivered onto the dishes in a pressurized state. Thus, the dirt on the dishes can be disintegrated and removed from the dishes. Consequently, the cleaning process is performed.

The dishwasher (1) of the present invention comprises the spray arm (5) that enables the water to be delivered to different nozzles (6) depending on the different water pressures in the washing and rinsing steps. In the washing step, the water is delivered to the washing tub (3) at a higher pressure. Thus, the dirt is enabled to be disintegrated. In the rinsing step, the water is sent at a lower pressure and with a smaller cross-section. Thus, the dirt and detergent residues can be completely removed from the dishes. By spraying the water through different nozzles (6) in the washing and rinsing steps, the washing and rinsing performances are increased.

In an embodiment of the present invention, the dishwasher (1) comprises the spray arm (5) having a connection element (7) that enables the spray arm (5) to be connected to the water delivery line; a first duct (8) that is arranged on the spray arm (5) and on which a plurality of rinsing nozzles (6a) are provided for the delivery of the water into the washing tub (3) in the rinsing step; a second duct (9) on which a plurality of washing nozzles (6b) are provided for the delivery of pressurized water into the washing tub (3) in the washing step; a first closure member (10) that is arranged on the part of the connection element (7) opening into the first duct (8), and a second closure member (11) that is arranged on the part of the connection element (7) opening into the second duct (9). The ducts (8, 9) are provided on the spray arm (5). The rinsing nozzles (6a) are provided on the first duct (8) and the washing nozzles (6b) are provided on the second duct (9). By delivering the water through different ducts (8, 9), the water is enabled to be sprayed through different nozzles (6). The spray arm (5) is fixed to the washing tub (3) by means of the connection element (7). The first closure member (10) is provided at the part of the connection element (7) opening into the first duct (8) and the second closure member (11) at the part thereof opening to the second duct (9). By means of the closure members (10, 11), the water flow towards the ducts (8, 9) can be controlled.

In an embodiment of the present invention, the dishwasher (1) comprises the first closure member (10) that has a spring (12) that enables the same to be fixed to the connection element (7) and a headpiece (13) that enables the water delivery to the first duct (8) to be controlled. The first closure member (10) is fixed to the connection element (7) by means of the spring (12). The headpiece (13) is disposed at the other end of the spring (12). The spring (12) moves upwards and downwards. Thus, the headpiece (13) is enabled to be moved up and down. When the water is delivered from the connection element (7) to the spray arm (5) with a high pressure, the spring (12) stretches upwards and the headpiece (13) is also enabled to be moved upwards.

In an embodiment of the present invention, the dishwasher (1) comprises the second closure member (11) having a mouth portion (14) that can be opened/closed with the effect of the water. The water delivered to the connection element (7) is delivered to the second duct (9) when the mouth portion (14) of the second closure member (11) opens. The mouth portion (14) can be opened with the high pressure water. The mouth portion (14) is not opened when the pressure of the water is low and the water flows through the first closure element (10) and reaches the first duct (8).

In an embodiment of the present invention, the dishwasher (1) comprises the second closure member (11) produced from elastomeric material. By producing the second closure member (11) from elastomeric material, the mouth portion (14) opens with the effect of the high pressure water and then returns to its original state.

In an embodiment of the present invention, the dishwasher (1) comprises a housing (15) that is provided on the connection element (7) and wherein the second closure member (11) is placed, and an opening (16) that opens from the connection element (7) into the first duct (8). The second closure member (11) is fixed on the housing (15). The headpiece (13) bears against the opening (16) upon moving upwards with the water pressure and enables the water to be delivered to the second duct (9) through the second closure member (11).

In an embodiment of the present invention, the dishwasher (1) comprises the spray arm (5) having a first position (A) wherein the headpiece (13) moves upwards and closes the opening (16) when the spring (12) stretches with the pressure of the water delivered in the washing process and the water is delivered only to the second duct (9) through the second closure member (11), and a second position (B) wherein the mouth portion (14) of the second closure member (11) is not opened and the water is delivered only to the first duct (8) as the first closure member (10) does not close the opening (16). In the washing step, the spray arm (5) is in the first position (A). In the first position (A), the pressure of the water delivered to the spray arm (5) is higher. By means of the high pressure water, the mouth portion (14) of the second closure member (11) opens and allows water passage. The water flows only through the second duct (9). Thus, the washing performance is increased. When the spray arm (5) is in the second position (B), the pressure of the water delivered to the spray arm (5) is lower. Under low water pressure, the mouth portion (14) of the second closure member (11) remains closed and the water is delivered only to the first duct (8) by passing through the opening (16). Thus, the rinsing performance is increased.

In an embodiment of the present invention, the dishwasher (1) comprises the rinsing nozzle (6a) with a diameter that is smaller than that of the washing nozzle (6b). The water is sent so as to have a smaller surface area by means of the rinsing nozzle (6a) with the smaller diameter. Thus, the dirt and detergent residues can be removed from the dishes.

By means of the present invention, a dishwasher (1) with increased washing efficiency is realized. The washing nozzles (6b) and rinsing nozzles (6a) provided on the spray arm (5) enable the water to be sprayed onto the dishes at different speed and with different cross-sectional areas in the washing and rinsing steps. Thus, the washing and rinsing performances are increased. The spray arm (5) is fixed to the washing tub (3) by means of a connection element (7). The first closure member (10) and the second closure member (11) are provided on the connection element (7). The first closure member (10) enables the opening (16) to be closed when the water pressure is high and the water to be delivered only to the second duct (9) through the second closure member (11). When the water is at a lower pressure, the second closure member (11) prevents the passage of water and the water is delivered only to the first duct (8) through the first closure member (10).

Claims

A dishwasher (1) comprising a body (2); a washing tub (3) that is arranged in the body (2) and wherein the washing process is realized; at least one rack (4) that is arranged in the washing tub (3) and wherein the dishes are placed to be washed; at least one spray arm (5) that is arranged in the vicinity of the rack (4) and that provides the delivery of water into the washing tub (3), and a plurality of nozzles (6) that are provided on the spray arm (5) and that enable the water received from the nozzle (5) to be pressurized and sprayed onto the dishes, characterized by the spray arm (5) that enables the water to be delivered to different nozzles (6) depending on the different water pressures in the washing and rinsing steps.
A dishwasher (1) as in Claim 1, characterized by the spray arm (5) comprising a connection element (7) that enables the spray arm (5) to be connected to the water delivery line; a first duct (8) that is arranged on the spray arm (5) and on which a plurality of rinsing nozzles (6a) are provided for the delivery of the water into the washing tub (3) in the rinsing step; a second duct (9) on which a plurality of washing nozzles (6b) are provided for the delivery of pressurized water into the washing tub (3) in the washing step; a first closure member (10) that is arranged on the part of the connection element (7) opening into the first duct (8), and a second closure member (11) that is arranged on the part of the connection element (7) opening into the second duct (9).
A dishwasher (1) as in Claim 2, characterized by the first closure member (10) comprising a spring (12) that enables the same to be fixed to the connection element (7) and a headpiece (13) that enables the water delivery to the first duct (8) to be controlled.
A dishwasher (1) as in Claim 3, characterized by the second closure member (11) comprising a mouth portion (14) that can be opened/closed with the effect of the water.
A dishwasher (1) as in Claim 4, characterized by the second closure member (11) that is produced from an elastomeric material.
A dishwasher (1) as in any one of claims 2 to 5, characterized by a housing (15) that is provided on the connection element (7) and wherein the second closure member (11) is placed, and an opening (16) that opens from the connection element (7) into the first duct (8).
A dishwasher (1) as in any one of the above claims, characterized by the spray arm (5) having a first position (A) wherein the headpiece (13) moves upwards and closes the opening (16) when the spring (12) stretches with the pressure of the water delivered in the washing process and the water is delivered only to the second duct (9) through the second closure member (11), and a second position (B) wherein the mouth portion (14) of the second closure member (11) is not opened and the water is delivered only to the first duct (8) as the first closure member (10) does not close the opening (16).
A dishwasher (1) as in any one of claims 2 to 7, characterized by the rinsing nozzle (6a) with a diameter smaller than that of the washing nozzle (6b).