Water spraying apparatus of dishwasher and dishwasher comprising the same

Patent metadata

Field	Value
Publication number	US-9516988-B2
Application number	US-201214343337-A
Country	US
Kind code	B2
Filing date	Sep 7, 2012
Priority date	Sep 9, 2011
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A water spraying apparatus of a dishwasher and the dishwasher comprising the water spraying apparatus are provided. The water spraying apparatus comprises a water source connecting pipe having a water outlet tube, a spraying arm having a water inlet tube, and a connecting device connecting the water source connecting pipe with the spraying arm, in which the connecting device comprises first and second semicircular fitting rings which are adapted to snap-fit with each other to form a connecting ring, the connecting ring is rotatably fitted over the water outlet tube of the water source connecting pipe and positioned in an axial direction of the connecting ring between the water inlet tube of the spraying arm and the water outlet tube of the water source connecting pipe.

First claim

What is claimed is:

1. A water spraying apparatus of a dishwasher comprising:
a water source connecting pipe having a water outlet tube,
a spraying arm having a water inlet tube, and
a connecting device connecting the water source connecting pipe with the spraying arm, wherein the connecting device comprises first and second semicircular fitting rings which are adapted to snap-fit with each other to form a connecting ring, the connecting ring is rotatably fitted over the water outlet tube of the water source connecting pipe and positioned in an axial direction of the connecting ring between the water inlet tube of the spraying arm and the water outlet tube of the water source connecting pipe;
wherein the first semicircular fitting ring is provided with a first snapping tongue and a first backstop rib, and the second semicircular fitting ring is provided with a second snapping tongue snap-fitted with the first backstop rib and a second backstop rib snap-fitted with the first snapping tongue;
wherein the first snapping tongue is disposed on a peripheral surface of the first semicircular fitting ring and adjacent to an engaging surface of the first semicircular fitting ring with the second semicircular fitting ring, and the second snapping tongue is disposed on a peripheral surface of the second semicircular fitting ring and adjacent to an engaging surface of the second semicircular fitting ring with the first semicircular fitting ring.

2. The water spraying apparatus according to claim 1 , wherein the first semicircular fitting ring is further provided with a first positioning protrusion and a first positioning recess which are located on an engaging surface of the first semicircular fitting ring with the second semicircular fitting ring; and
the second semicircular fitting ring is further provided with a second positioning protrusion and a second positioning recess which are located on an engaging surface of the second semicircular fitting ring with the first semicircular fitting ring;
wherein the first positioning protrusion is fitted with the second positioning recess, and the first positioning recess is fitted with the second positioning protrusion.

3. The water spraying apparatus according to claim 2 , wherein the first and second positioning protrusions are centrosymmetric with respect to an axis of the connecting ring.

4. The water spraying apparatus according to claim 1 , wherein at least two first pressure relief grooves are formed in an inner wall surface of the first semicircular fitting ring, and extend upwards to an upper surface of the first semicircular fitting ring, wherein a first pressure relief platform is formed at a bottom of the first pressure relief groove; and
at least two second pressure relief grooves are formed in an inner wall surface of the second semicircular fitting ring, and extend upwards to an upper surface of the second semicircular fitting ring, wherein a second pressure relief platform is formed at a bottom of the second pressure relief groove.

5. The water spraying apparatus according to claim 4 , wherein the first pressure relief groove is configured to have a cross section of an irregular polygon and have at least one bevel which is inclined inwardly toward an engaging surface of the first semicircular fitting ring with the second semicircular fitting ring,
wherein the second pressure relief groove is configured to have a cross section of an irregular polygon and have at least one bevel which is inclined inwardly toward an engaging surface of the second semicircular fitting ring with the first semicircular fitting ring.

6. The water spraying apparatus according to claim 4 , wherein the first pressure relief grooves are symmetrical with the second pressure relief grooves respectively.

7. The water spraying apparatus according to claim 1 , wherein the connecting device further comprises:
holding portions disposed at outer edges of top surfaces of the first and second semicircular fitting rings respectively and extended outwards.

8. The water spraying apparatus according to claim 7 , wherein a first flange is disposed at an end of the water outlet tube of the water source connecting pipe and extended outwards in a radial direction of the water outlet tube, and the connecting device is rotatably fitted over the water outlet tube and positioned onto the first flange in the axial direction.

9. The water spraying apparatus according to claim 8 , wherein a first supporting bar is formed on a contact surface of the first semicircular fitting ring with the first flange, has a semicircular shape and is coaxial with the first semicircular fitting ring; and
a second supporting bar is formed on a contact surface of the second semicircular fitting ring with the first flange, has a semicircular shape and is coaxial with the second semicircular fitting ring.

10. The water spraying apparatus according to claim 1 , wherein a second flange is formed at an end of the water inlet tube of the spraying arm and extended inwards in a radial direction of the water inlet tube, and an annular groove is formed in a peripheral surface of the connecting ring in a circumferential direction of the connecting ring, wherein the second flange is fitted in the annular groove to connect the water inlet tube to the connecting device.

11. The water spraying apparatus according to claim 10 , wherein an annular sealing rib is disposed on a fitting surface of the second flange with the annular groove.

12. The water spraying apparatus according to claim 11 , wherein the annular sealing rib is coaxial with the connecting ring.

13. The water spraying apparatus according to claim 10 , wherein an annular sealing groove is formed in a top wall of the annular groove and the annular sealing rib is fitted within the annular sealing groove.

14. The water spraying apparatus according to claim 10 , wherein a plurality of arc-shaped fitting blocks are disposed onto an inner wall of the water inlet tube of the spraying arm, extended in a circumferential direction of the water inlet tube, and spaced apart from each other in the circumferential direction, wherein a first extension portion is extended from a periphery of the first semicircular fitting ring outwards in a radial direction of the first semicircular fitting ring, and a second extension portion is extended from a periphery of the second semicircular fitting ring outwards in a radial direction of the second semicircular fitting ring, wherein the first and second extension portions are supported onto the arc-shaped fitting blocks respectively.

15. The water spraying apparatus according to claim 14 , wherein a positioning boss is disposed at a top surface of each of the arc-shaped fitting blocks and adjacent to the inner wall of the water inlet tube, and a positioning groove into which the positioning boss is fitted is formed in each of the first and the second extension portions.

16. A dishwasher comprising a water spraying apparatus, wherein the spraying apparatus comprises:
a water source connecting pipe having a water outlet tube,
a spraying arm having a water inlet tube, and
a connecting device connecting the water source connecting pipe with the spraying arm, wherein the connecting device comprises first and second semicircular fitting rings which are adapted to snap-fit with each other to form a connecting ring, the connecting ring is rotatably fitted over the water outlet tube of the water source connecting pipe and positioned in an axial direction of the connecting ring between the water inlet tube of the spraying arm and the water outlet tube of th

Assignees

• Zhao Weidong
• Tian Fang
• Foshan Shunde Midea Washing Appliances Mfg Co Ltd
• Midea Group Co Ltd

Inventors

• Zhao Weidong
• Tian Fang

Classifications

• A47L15/23 Primary

  moved by means of the sprays · CPC title

• F16L27/0849

  the fluid being turned through an angle when passing from one joint element to another · CPC title

• F16L27/0804

  the fluid passing axially from one joint element to another · CPC title

• A47L15/4278 Primary

  Nozzles · CPC title