# US 11,896,986 B2 · Nozzle device applied to high-pressure cleaning machine and handheld high-pressure cleaning machine

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- Number: US 11,896,986 B2
- Document ID: US11896986B2
- Status: Granted
- Kind: B2
- Application number: 17/271,924
- Filed: 2019-08-26
- Published: 2021-10-14
- Granted: 2024-02-13
- Earliest claimed: 2018-08-28
- Assignees: Positec Technology (China) Co., Ltd.
- Applicants: Positec Power Tools (Suzhou) Co., Ltd
- Inventors: Yong Qiao; Qibin Wang; Yajie Cheng
- Web page: https://patentgrep.com/patent/US11896986B2

## CPC

- B05B 9/0426: {with a pump attached to the spray gun or discharge device (single-units hand-held apparatus in which the flow is effected by a pump B05B11/10)}
- B05B 12/087: {Flow or presssure regulators, i.e. non-electric unitary devices comprising a sensing element, e.g. a piston or a membrane, and a controlling element, e.g. a valve}
- B05B 9/01: Spray pistols, {discharge devices}(B05B9/03 takes precedence)
- B05B 9/04: with pressurised or compressible container (aerosol containers B65D83/14); with pump
- B08B 3/026: {Cleaning by making use of hand-held spray guns; Fluid preparations therefor}
- B05B 1/1654: {about an axis parallel to the liquid passage in the stationary valve element}
- B08B 3/028: {Spray guns}
- B08B 2203/0211: Case coverings
- B08B 2203/027: Pump details
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL

## Abstract

A nozzle device applied to a high-pressure cleaning machine is provided, including: a nozzle, including a nozzle casing, where a water outlet channel is provided in the nozzle casing, and a front end of the nozzle casing is provided with at least one liquid discharge port connecting with the water outlet channel; and an exhaust valve, connected to the nozzle casing, and including: a valve seat, provided with a valve cavity; and a valve core, movably arranged in the valve cavity; where the valve seat is provided with an air inlet hole and an air outlet hole, the water outlet channel and a main exhaust passage are arranged in parallel in the nozzle casing, and the valve core is movable relative to the valve cavity to a closed position for blocking the main exhaust passage and an open position for opening the main exhaust passage. In the nozzle device applied to a high-pressure cleaning machine and a handheld high-pressure cleaning machine that are provided in this application, the exhaust valve is provided, and the exhaust valve implements an exhaust function at the open position, and implements a water outlet function at the closed position, thereby implementing self-suction and ensuring that a pressure anomaly is quickly eliminated within a short time during use, to meet a use requirement.

## Claims

### Claim 1

A nozzle device applied to a high-pressure cleaning machine, comprising:
a nozzle, comprising a nozzle casing, wherein a water outlet channel is provided in the nozzle casing, and a front end of the nozzle casing is provided with at least one liquid discharge port connecting with the water outlet channel, wherein
the nozzle device further comprises an exhaust valve connected to the nozzle casing, and the exhaust valve comprises:
a valve seat, provided with a valve cavity capable of connecting with the water outlet channel; and
a valve core, arranged in the valve cavity and movable relative to the valve cavity; wherein
the valve seat is provided with an air inlet hole and an air outlet hole, the air inlet hole connects with the water outlet channel and the valve cavity, the air outlet hole connects with the valve cavity, and the air inlet hole, the valve cavity, and the air outlet hole together form a main exhaust passage connecting with external air and the water outlet channel; the nozzle device further comprises an exhaust port capable of discharging gas that enters the main exhaust passage to the outside; and the valve core is movable relative to the valve cavity to a closed position for blocking the main exhaust passage and an open position for opening the main exhaust passage.

### Claim 2 (depends on 1)

The nozzle device applied to a high-pressure cleaning machine according to claim 1, wherein the exhaust port and the air outlet hole are integrated, or the exhaust port and the air outlet hole are independent of each other and the exhaust port is provided in the nozzle casing.

### Claim 3 (depends on 2)

The nozzle device applied to a high-pressure cleaning machine according to claim 2, wherein a central axis of the exhaust port is basically parallel or perpendicular to a central axis of the liquid discharge port.

### Claim 4 (depends on 2)

The nozzle device applied to a high-pressure cleaning machine according to claim 2, wherein an opening of the exhaust port and an opening of the liquid discharge port face a same side.

### Claim 5 (depends on 1)

The nozzle device applied to a high-pressure cleaning machine according to claim 1, wherein the nozzle casing comprises a body and a cover body with a central axis, the cover body is circumferentially rotatably joined outside the body around the central axis, the cover body is provided with the liquid discharge port, the water outlet channel is provided in the body, and the exhaust valve is arranged in the body.

### Claim 6 (depends on 5)

The nozzle device applied to a high-pressure cleaning machine according to claim 5, wherein the air outlet hole and the exhaust port are independently arranged, there are a plurality of exhaust ports, the plurality of exhaust ports are circumferentially arranged on the cover body around the central axis, there are a plurality of liquid discharge ports, the plurality of liquid discharge ports are circumferentially arranged on the cover body around the central axis, the cover body is operable to rotate circumferentially around the central axis to select one of the plurality of liquid discharge ports to connect with the water outlet channel, and in this case, one of the exhaust ports connects with the air outlet hole.

### Claim 7 (depends on 1)

The nozzle device applied to a high-pressure cleaning machine according to claim 1, wherein the nozzle casing comprises a body and a cover body with a central axis, the cover body is circumferentially rotatably joined outside the body around the central axis, the cover body is provided with the liquid discharge port, the water outlet channel is provided in the body, and the exhaust valve is arranged in the cover body.

### Claim 8 (depends on 7)

The nozzle device applied to a high-pressure cleaning machine according to claim 7, wherein there are a plurality of exhaust ports, the plurality of exhaust ports are circumferentially arranged on the cover body around the central axis, a plurality of exhaust valves and liquid discharge ports are arranged in one-to-one correspondence, there are a plurality of liquid discharge ports, the plurality of liquid discharge ports are circumferentially arranged on the cover body around the central axis, the cover body is operable to rotate circumferentially around the central axis to select one of the plurality of liquid discharge ports to connect with the water outlet channel, and in this case, one of the exhaust ports connects with the air outlet hole.

### Claim 9 (depends on 1)

The nozzle device applied to a high-pressure cleaning machine according to claim 1, wherein the nozzle device comprises a spray rod, the spray rod is arranged between the nozzle and the high-pressure cleaning machine, and the water outlet channel extends from the spray rod to the nozzle.

### Claim 10 (depends on 1)

The nozzle device applied to a high-pressure cleaning machine according to claim 1, wherein the valve core comprises a core body and a reset member, and a gap is provided between the air inlet hole and the core body at the open position.

### Claim 11 (depends on 1)

The nozzle device applied to a high-pressure cleaning machine according to claim 1, wherein the high-pressure cleaning machine is a handheld high-pressure cleaning machine, the handheld high-pressure cleaning machine comprises a handheld portion, a motor, and a water pump driven by the motor, the motor and the water pump are both arranged in the handheld portion, and the nozzle device is joined to the handheld portion.

### Claim 12

A handheld high-pressure cleaning machine, comprising a handheld portion, a motor, a water pump driven by the motor, and a nozzle device, wherein the motor and the water pump are both arranged in the handheld portion, the nozzle device is joined to the handheld portion, and the nozzle device comprises:
a main body, wherein a water outlet channel is provided in the main body, and a front end of the main body is provided with at least one liquid discharge port connecting with the water outlet channel; and
an exhaust valve, arranged on a path between a liquid outlet of the water pump and the liquid discharge port of the nozzle, wherein the exhaust valve comprises:
a valve seat, provided with a valve cavity capable of connecting with the water outlet channel; and
a valve core, movably arranged in the valve cavity; wherein
the valve seat is provided with an air inlet hole and an air outlet hole, the air inlet hole connects with the water outlet channel and the valve cavity, the air outlet hole connects with the valve cavity, and the air inlet hole, the valve cavity, and the air outlet hole together form a main exhaust passage connecting with external air and the water outlet channel; and the valve core is movable relative to the valve cavity to a closed position for blocking the main exhaust passage and an open position for opening the main exhaust passage.

### Claim 13 (depends on 12)

The handheld high-pressure cleaning machine according to claim 12, wherein the main body comprises a nozzle and a spray rod connecting the nozzle and the handheld portion, the water outlet channel extends from the spray rod to the nozzle, the exhaust valve is assembled on the spray rod, and the air outlet hole is exposed from the spray rod.

### Claim 14 (depends on 12)

The handheld high-pressure cleaning machine according to claim 12, wherein the main body comprises a nozzle, the nozzle comprises a nozzle casing, the water outlet channel is provided in the nozzle casing, and a front end of the nozzle casing is provided with at least one liquid discharge port connecting with the water outlet channel; and the exhaust valve is assembled in the nozzle casing.

### Claim 15 (depends on 14)

The handheld high-pressure cleaning machine according to claim 14, wherein the nozzle device further comprises an exhaust port capable of discharging gas that enters the main exhaust passage through the air inlet hole to the outside; and the exhaust port and the air outlet hole are integrated, or the exhaust port and the air outlet hole are independent of each other and the exhaust port is provided in the nozzle casing.

### Claim 16 (depends on 15)

The handheld high-pressure cleaning machine according to claim 15, wherein a central axis of the exhaust port is basically parallel to a central axis of the liquid discharge port.

### Claim 17 (depends on 15)

The handheld high-pressure cleaning machine according to claim 15, wherein an opening of the exhaust port and an opening of the liquid discharge port face a same side.

### Claim 18 (depends on 15)

The handheld high-pressure cleaning machine according to claim 15, wherein the air outlet hole and the exhaust port are independently arranged, the nozzle casing comprises a body and a cover body with a central axis, the cover body is circumferentially rotatably joined outside the body around the central axis, there are a plurality of exhaust ports, the plurality of exhaust ports are circumferentially arranged on the cover body around the central axis, there are a plurality of liquid discharge ports, the plurality of liquid discharge ports are circumferentially arranged on the cover body around the central axis, the cover body is operable to rotate circumferentially around the central axis to select one of the plurality of liquid discharge ports to connect with the water outlet channel and in this case, one of the exhaust ports connects with the air outlet hole.

### Claim 19 (depends on 15)

The handheld high-pressure cleaning machine according to claim 15, wherein the nozzle casing comprises a body and a cover body with a central axis, the cover body is circumferentially rotatably joined outside the body around the central axis, the cover body is provided with the liquid discharge port, the water outlet channel is provided in the body, and the exhaust valve is arranged in the cover body; and there are a plurality of exhaust ports, the plurality of exhaust ports are circumferentially arranged on the cover body around the central axis, a plurality of exhaust valves and liquid discharge ports are arranged in one-to-one correspondence, there are a plurality of liquid discharge ports, the plurality of liquid discharge ports are circumferentially arranged on the cover body around the central axis, the cover body is operable to rotate circumferentially around the central axis to select one of the plurality of liquid discharge ports to connect with the water outlet channel, and in this case, one of the exhaust ports connects with the air outlet hole.

### Claim 20 (depends on 12)

The handheld high-pressure cleaning machine according to claim 12, wherein the exhaust valve is arranged in the handheld portion and located at the liquid outlet of the water pump.