EP4578556A1 - Pulvérisateur sans air portatif - Google Patents
Pulvérisateur sans air portatif Download PDFInfo
- Publication number
- EP4578556A1 EP4578556A1 EP24220939.3A EP24220939A EP4578556A1 EP 4578556 A1 EP4578556 A1 EP 4578556A1 EP 24220939 A EP24220939 A EP 24220939A EP 4578556 A1 EP4578556 A1 EP 4578556A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure relief
- valve
- liquid
- liquid outlet
- hole
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
- B05B9/085—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump
- B05B9/0855—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being motor-driven
- B05B9/0861—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being motor-driven the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
Definitions
- the subject matter described herein relates to a sprayer, and more particularly relates to a handheld airless sprayer.
- a handheld airless sprayer also called a handheld high-pressure airless paint sprayer, is a spray gun powered by a battery pack to spray a paint or coating pressurized by a high-pressure piston pump body.
- a technical problem to be solved by the disclosure is mitigating the impact of piston movement frequency on spray effect, so as to prevent spray inconsistency in a case of low-frequency piston movement, thereby improving spray quality.
- a handheld airless sprayer comprising: a casing, a liquid cup, a nozzle, a pump body, an actuation mechanism, and a liquid outlet valve, the nozzle being disposed at a front end of the casing, the pump body being provided with a pump chamber, a liquid inlet end of the pump chamber being connected to the liquid cup via a first check valve, a liquid outlet end of the pump chamber being connected to the liquid outlet valve via a second check valve, characterized in that the liquid outlet valve comprises a valve body, a valve seat, a valve head, and a spring, the valve body being provided with a buffer chamber, the valve seat, the valve head, and the spring being arranged in the valve body; a liquid outlet hole communicating with the nozzle is provided on the valve seat; the spring acts on the valve head to bias the valve head towards a direction of closing the liquid outlet hole; the actuation mechanism activates the pump body to draw liquid from the liquid cup into the buffer chamber; and the valve head is opened when a liquid pressure in the buffer chamber exceed
- the valve seat comprises a valve seat body and a poppet, the poppet being fixedly connected to the valve seat body in a detachable manner, the poppet being mounted at one end of the valve seat body distal from the nozzle, a limiting cavity configured to limit the valve head and the spring being formed between the poppet and the valve seat body, the valve head being movable in the limiting cavity.
- the poppet is hollow inside and provided with a liquid inlet hole communicating with the liquid outlet hole, the valve head being operable to open and close the liquid inlet hole leading to opening and closing of the liquid outlet hole.
- the liquid outlet valve further comprises a valve stem, the valve stem being slidably arranged in the valve seat body, the valve stem and the valve seat body being peripherally sealed so that a sealing cavity is formed between the valve stem and the poppet, the spring being disposed in the sealing cavity, one end of the spring abutting against the poppet, an opposite end of the spring abutting against the valve stem, the valve head being disposed on the valve stem; and the valve head comprises a conical tip, the conical tip being partially inserted in the liquid outlet hole to close the liquid outlet hole.
- a fixed holder is arranged in one end of the valve body proximal to the pump body; the valve body further comprises a valve stem, the valve head being fixed on the valve stem; a blind hole is provided on the fixed holder, one end of the valve stem being movably inserted in the blind hole, one end of the spring abutting against the fixed holder, an opposite end of the spring abutting against the valve stem; and the valve head comprises a conical tip, the conical tip being partially inserted in the liquid outlet hole to close the liquid outlet hole.
- the actuation mechanism acts on the pump body to induce volume change of the pump chamber, a ratio of maximum volume of the pump chamber to a liquid accommodable volume of the buffer chamber ranging from 1:1 to 1:50.
- the pump body is further provided with a pressure relief passage, the pressure relief passage comprising a first passage section communicating with the pump chamber and a second passage section communicating with the liquid cup; and a pressure relief valve is arranged between the first passage section and the second passage section, a prese relief pressure of the pressure relief valve being greater than the preset liquid outlet pressure of the liquid outlet valve.
- the pressure relief valve comprises a pressure relief valve body, a pressure relief poppet, a pressure relief valve stem, a pressure relief valve head, and a pressure relief spring; a first pressure relief hole and a second pressure relief hole that communicate with each other are provided on the pressure relief valve body, the first pressure relief hole communicating with the first passage section, the second pressure relief hole communicating with the second passage section; the pressure relief valve stem is movably mounted on the pressure relief poppet; one end of the pressure relief spring abuts against the pressure relief poppet, and an opposite end thereof abuts against the pressure relief valve stem; the pressure relief valve head is fixed on the pressure relief valve stem; a conical surface is formed on the pressure relief valve head; and the pressure relief spring acts on the pressure relief valve stem to bias the conical surface in a direction towards the first pressure relief hole, the first pressure relief hole being closed by the pressure relief valve head when liquid pressure in the buffer chamber is lower than the preset relief pressure.
- the pressure relief valve further comprises a pressure relief bonnet, the pressure relief valve stem extending in a direction opposite the first passage section to project out of the pressure relief bonnet; and a manipulator is mounted at a tail end of the pressure relief valve stem, the manipulator being operable such that the pressure relief valve head opens the first pressure relief hole, leading to active pressure relief of the pressure relief valve.
- the manipulator comprises a rotary knob, the rotary knob being cover-fitted on the pressure relief bonnet and rotatable relative to the pressure relief bonnet, a support portion being arranged on one of the pressure relief bonnet and the rotary knob, an abutting portion being arranged on the other one of the pressure relief bonnet and the rotary knob, the pressure relief spring acting on the rotary knob so that the abutting portion abuts against the support portion; and the support portion comprises a first support section and a second support section, wherein when the abutting portion abuts against the first support section, the pressure relief valve releases pressure actively, and when the abutting portion abuts against the second support section, the pressure relief valve suspends active pressure relief.
- the support portion further comprises a partition section arranged between the first support section and the second support section, a surface of the partition section changing gradually in a direction from the first support section towards the second support section.
- the abutting portion is formed of a convex arc shape
- the second support section is formed of a concave arc shape adapted to the abutting portion.
- the first support section is at least partially formed of a concave arc shape adapted to the abutting portion.
- the ratio of the maximum volume of the pump chamber 141 to the accommodable liquid volume of the buffer chamber 211 is set in a range from 1:10 to 1:40. Furthermore, the volume ratio is set in a range from 1:1 to 1:30. Yet furthermore, the volume ratio is set in a range from 1:1 to 1:20. As a feasible solution of this implementation, the volume ratio therebetween may be set to 1:5, 1:6, 1:7, 1:8, 1:9, or 1:10, etc.
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- Safety Valves (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323465936 | 2023-12-19 | ||
| CN202420373843.5U CN222490550U (zh) | 2023-12-19 | 2024-02-28 | 一种无气便携式喷枪 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4578556A1 true EP4578556A1 (fr) | 2025-07-02 |
Family
ID=93925921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24220939.3A Pending EP4578556A1 (fr) | 2023-12-19 | 2024-12-18 | Pulvérisateur sans air portatif |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP4578556A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20209594U1 (de) * | 2002-06-20 | 2002-08-29 | Deuerlein GmbH, 91126 Schwabach | Zerstäubungsdüse |
| US9016599B2 (en) * | 2009-05-07 | 2015-04-28 | Graco Minnesota Inc. | Wobble assembly for fluid pumping mechanism |
| US20150217312A1 (en) * | 2012-09-13 | 2015-08-06 | Graco Minnesota Inc. | Accumulator for airless sprayer |
| WO2022256183A1 (fr) * | 2021-06-01 | 2022-12-08 | Graco Minnesota Inc. | Pulvérisateur de fluide portable ayant un amortisseur tubulaire |
-
2024
- 2024-12-18 EP EP24220939.3A patent/EP4578556A1/fr active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20209594U1 (de) * | 2002-06-20 | 2002-08-29 | Deuerlein GmbH, 91126 Schwabach | Zerstäubungsdüse |
| US9016599B2 (en) * | 2009-05-07 | 2015-04-28 | Graco Minnesota Inc. | Wobble assembly for fluid pumping mechanism |
| US20150217312A1 (en) * | 2012-09-13 | 2015-08-06 | Graco Minnesota Inc. | Accumulator for airless sprayer |
| WO2022256183A1 (fr) * | 2021-06-01 | 2022-12-08 | Graco Minnesota Inc. | Pulvérisateur de fluide portable ayant un amortisseur tubulaire |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| AK | Designated contracting states |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |