CN-224229360-U - Water inlet valve restrictor anti-drop structure and water inlet valve using same

CN224229360UCN 224229360 UCN224229360 UCN 224229360UCN-224229360-U

Abstract

The water inlet valve flow limiting part anti-drop structure is characterized in that a flow limiting part is arranged in a water outlet pipeline, a water outlet section of the flow limiting part is formed into an inward shrinking section which is close to the water outlet edge and thermally deformed and a fixing section far away from the water outlet edge in a surrounding and hot melting mode, the pipeline inner diameter of the fixing section is defined as a basic inner diameter D1, the pipeline inner diameter and the basic inner diameter at the joint of the inward shrinking section and the fixing section are equal, the pipeline inner diameter and the basic inner diameter are both D1=8.0 mm+/-2.0 mm, the inward shrinking section is provided with an inward shrinking ring close to the water outlet edge, the minimum inner diameter of a pipeline of the inward shrinking section is defined as D2, the inward shrinking amount of the inward shrinking section is defined as dr= (D1-D2)/2, dr=0.3-1.5 mm, and the length L of the inward shrinking section along the water flow direction is 3-7 mm. The hot melt water outlet section forms the inward shrinking section, the inward shrinking section gradually radially inwards shrinks along the water flow direction, the water outlet pipeline of the water inlet valve can keep the original appearance and structure basically unchanged, parts such as plugs and the like are not needed to be arranged, the current limiting piece in the water outlet pipeline can be reliably fixed, and the water outlet pipeline can bear high water pressure impact force of more than 300N without being separated from the water outlet pipeline.

Inventors

Ao lin
LIANG HAOMING

Assignees

汉宇集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250604

Claims (4)

1. The anti-falling structure of the water inlet valve flow limiting piece is characterized in that the flow limiting piece (7) is arranged in a water outlet pipeline (1) of the water inlet valve, the water outlet pipeline (1) comprises a water outlet section (3), the water outlet section (3) is formed into an inward shrinking section (4) which is abutted against the water outlet edge (2) and thermally deformed along the periphery of the water outlet section and a fixing section (5) which is far away from the water outlet edge (2) through hot melting, and the inward shrinking section gradually shrinks inwards in the radial direction of water flow; The inner diameter of the pipeline of the fixed section (5) is defined as a basic inner diameter D1, and the inner diameter of the pipeline at the joint of the shrinking section (4) and the fixed section (5) is equal to the basic inner diameter D1, and is d1=8.0 mm+/-2.0 mm; The shrinking-in section (4) is provided with a shrinking-in ring (6) close to the water outlet edge (2), the shrinking-in ring is provided with a minimum inner diameter of a shrinking-in section (4) pipeline, the minimum inner diameter is defined as D2, the shrinking-in amount of the shrinking-in section (4) is defined as dr= (D1-D2)/2, and dr=0.3-1.5 mm; The length L of the inward shrinking section (4) along the water flow direction is 3-7 mm.
2. The flow restrictor anti-drop structure of inlet valve of claim 1, characterized in that the telescoping section (4) presents an inner circular table or table surface.
3. The water inlet valve current limiting piece anti-falling structure according to claim 1, wherein the current limiting piece (7) is partially or completely arranged in the fixed section (5), and the maximum clearance between the periphery of the current limiting piece (7) and a pipeline of the fixed section (5) is not more than 0.1mm.
4. A fill valve comprising a fill valve restrictor anti-fall structure as claimed in any one of claims 1 to 3.

Description

Water inlet valve restrictor anti-drop structure and water inlet valve using same Technical Field The utility model relates to an anti-falling structure of a water inlet valve flow limiting piece and a water inlet valve. Background With the development of household appliances such as dish washing machines and washing machines, a pilot electromagnetic water inlet valve with a plurality of water outlet channels is required to be used integrally, wherein the water outlet flow of part of the channels is required to be limited to be smaller (for example, 0.25-2.5L/min), and therefore, the water pressure of the pilot valve during the through flow is obviously reduced by arranging the flow limiting assembly in the water inlet channel, so that the closing reliability of the pilot valve is reduced, and therefore, the small flow limiting assembly is considered to be plugged in the water outlet channel to limit the flow of the water outlet channel. In the prior art, two mounting modes are considered for the small-sized flow limiting assembly, namely, the small-sized flow limiting assembly is in interference fit with the water outlet pipeline, and protruding ribs are arranged along the circumference of the inner wall of the water outlet pipeline to limit the small-sized flow limiting assembly, but the two mounting modes can not block the impact of ultrahigh water pressure to flush the small-sized flow limiting assembly out of the water outlet, so that the flow limiting function is lost. The Chinese patent application number 202310159041.4 discloses a small-flow-limiting column anti-falling device of a water inlet valve, a flow-limiting piece is plugged into a water outlet channel of the water inlet valve, and a plug is welded to plug the flow-limiting piece, so that the flow-limiting piece cannot fall off. The invention is provided with the plugs, and the production process and the cost are increased. Accordingly, there is a need for improvement. For terms and knowledge, unless indicated by the specification, see "IEC electric and electronic standard term dictionary" (Chinese Standard Press 1992 version 1) ", electrical manufacturing Art (mechanical industry Press 1982 version 1)", mechanical engineering Manual and Motor engineering Manual (mechanical industry Press 1978 version 1 and 1997 version 2) ", QB/T1291" Water inlet solenoid valve for automatic washing machine ". Disclosure of utility model In order to solve the technical problem that the flow-limiting piece of the water outlet channel of the water inlet valve of the household appliance is easy to fall off or parts are added in the background art, the utility model provides a structure for reliably preventing the flow-limiting piece in the water outlet channel of the water inlet valve from falling off. The technical scheme of the utility model is as follows: The water inlet valve flow limiting piece anti-drop structure is characterized in that the flow limiting piece is arranged in a water outlet pipeline of the water inlet valve, the water outlet pipeline comprises a water outlet section, the water outlet section is formed into an inward shrinking section which is close to the edge of the water outlet and thermally deformed and a fixing section which is far away from the edge of the water outlet along the periphery of the water outlet section in a hot melting way, and the inward shrinking section gradually shrinks inwards in the radial direction along the water flow direction; The inner diameter of the pipeline of the fixed section is defined as a basic inner diameter D1, and the inner diameter of the pipeline at the joint of the shrinking section and the fixed section is equal to the basic inner diameter D1, and the inner diameter is d1=8.0 mm plus or minus 2.0mm; The inward shrinking section is provided with an inward shrinking ring close to the edge of the water outlet, the inward shrinking ring is provided with a minimum inner diameter of an inward shrinking section pipeline, the minimum inner diameter is defined as D2, the inward shrinking amount of the inward shrinking section is defined as dr= (D1-D2)/2, and dr = 0.3-1.5 mm; the length L of the inward shrinking section along the water flow direction is 3-7 mm. The hot melt water outlet section forms the inward shrinking section, the inward shrinking section gradually shrinks inwards towards the radial direction along the water flow direction, the water outlet pipeline of the water inlet valve can keep the original appearance and structure basically unchanged, parts such as plugs and the like are not needed to be arranged, the current limiting piece in the water outlet pipeline can be reliably fixed, and experiments show that the current limiting piece can bear high water pressure impact force of more than 300N and cannot be separated from the water outlet pipeline. The further design is that the current limiting piece is partially or completely arranged in the fixed section, the maximum clearance betwe