Nozzle device applied to high-pressure cleaning machine and handheld high-pressure cleaning machine

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.

CROSS REFERENCE

This application is the National Stage filing under 35 U.S.C. 371 of International Application No. PCT/CN2019/102427, filed on Aug. 26, 2019, which claims the benefit of earlier filing date and right of priority to Chinese Application No. 201810989402.7, filed Aug. 28, 2018, the contents of which are all hereby incorporated by reference herein in their entirety.

BACKGROUND

Technical Field

The present invention relates to the field of high-pressure cleaning, and in particular, to a nozzle device applied to a high-pressure cleaning machine and a handheld high-pressure cleaning machine.

Related Art

High-pressure cleaning machines are widely used in daily life to clean yards, corridors, outdoor tables and chairs, windows, glass, stairs, and cars. A high-pressure cleaning machine is usually provided with a main unit inside which a motor and a pump driven by the motor are disposed, and further includes a spray gun connected to the water pump. In an initial startup phase of the high-pressure cleaning machine, the pump needs to empty air in a water inlet pipe before the pump can suck water normally. In the initial phase, the pump first empties the air in the water inlet pipe and the pump. The sucked water and the air in the water inlet pipe are mixed and pressurized in the pump. It is difficult to discharge the mixture of air and water. In addition, gas accumulates at a water outlet end to cause an increase in a pressure, it further becomes difficult for the gas in the pump to discharge. Consequently, self-suction takes a long time, or even a normal pressure for normal water spraying may fail to be restored.

SUMMARY

In view of this, it is necessary to provide a nozzle device that is applied to a high-pressure cleaning machine and can quickly eliminate a pressure anomaly within a short time.

It is also necessary to provide a nozzle device applied to a high-pressure cleaning machine, including:

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, wherethe nozzle device further includes an exhaust valve connected to the nozzle casing, and the exhaust valve includes:a valve seat, provided with a valve cavity capable of connecting with the water outlet channel; anda valve core, arranged in the valve cavity and movable relative to the valve cavity; wherethe 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 includes 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.

In an embodiment, 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.

In an embodiment, a central axis of the exhaust port is basically parallel or perpendicular to a central axis of the liquid discharge port.

In an embodiment, an opening of the exhaust port and an opening of the liquid discharge port face a same side.

In an embodiment, the nozzle casing includes 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.

In an embodiment, 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.

In an embodiment, the nozzle casing includes 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.

In an embodiment, 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.

In an embodiment, the nozzle device includes 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.

In an embodiment, the valve core includes 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.

In an embodiment, the high-pressure cleaning machine is a handheld high-pressure cleaning machine, the handheld high-pressure cleaning machine includes 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.

The present invention further provides a handheld high-pressure cleaning machine joined with the nozzle device.

A handheld high-pressure cleaning machine is provided, including a handheld portion, a motor, a water pump driven by the motor, and a nozzle device, where 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 includes:a main body, where 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; andan exhaust valve, arranged on a path between a liquid outlet of the water pump and the liquid discharge port of the nozzle, where the exhaust valve includes:a valve seat, provided with a valve cavity capable of connecting with the water outlet channel; anda valve core, movably arranged in the valve cavity; wherethe 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.

In an embodiment, the main body includes 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.

In an embodiment, the main body includes a nozzle, the nozzle includes 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.

In an embodiment, the nozzle device further includes 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.

In an embodiment, a central axis of the exhaust port is basically parallel to a central axis of the liquid discharge port.

In an embodiment, an opening of the exhaust port and an opening of the liquid discharge port face a same side.

In an embodiment, the air outlet hole and the exhaust port are independently arranged, the nozzle casing includes 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.

In an embodiment, the nozzle casing includes 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.

In an embodiment, the exhaust valve is arranged in the handheld portion and located at the liquid outlet of the water pump.

The present invention further provides a handheld high-pressure cleaning machine joined with the nozzle device.

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; andan exhaust valve, connected to the nozzle casing, where the exhaust valve includes:a valve seat, provided with a valve cavity capable of connecting with the water outlet channel; anda valve core, movably arranged in the valve cavity; wherethe 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 water outlet channel and the 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 an embodiment, the nozzle casing is provided with an exhaust port; andthe air outlet hole and the exhaust port are integrally arranged, and an opening direction of the exhaust port is consistent with an opening direction of the liquid discharge port; orthe air outlet hole and the exhaust port are independently arranged, and an opening direction of the exhaust port is consistent with an opening direction of the liquid discharge port.In an embodiment, a central axis of the exhaust port is parallel or perpendicular to a central axis of the liquid discharge port.

In an embodiment, the exhaust port and the liquid discharge port are located on a same end surface.

In an embodiment, the air outlet hole and the exhaust port are independently arranged, the nozzle casing includes 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, and one of the plurality of exhaust ports connects with the air outlet hole along with rotation of the cover body.

In an embodiment, an auxiliary exhaust passage is formed in the nozzle casing, the auxiliary exhaust passage connects with the main exhaust passage and the exhaust port, and the water outlet channel and the auxiliary exhaust passage are provided on two opposite sides of the central axis; orthe auxiliary exhaust passage connects with the water outlet channel and the main exhaust passage.

In an embodiment, there are a plurality of liquid discharge ports, and the plurality of liquid discharge ports are circumferentially arranged on the cover body around the central axis; andone of the plurality of liquid discharge ports connects with the water outlet channel along with rotation of the cover body.

In an embodiment, the valve cavity includes a first cavity and a second cavity selectively connecting with the first cavity, the valve core includes a core body and a reset member, the first cavity is in fluid connection with the water outlet channel, the second cavity is in fluid connection with the first cavity, the air outlet hole penetrates a cavity wall of the second cavity, the core body is slidably accommodated in the first cavity in a direction toward or away from the second cavity, and the reset member is accommodated in the second cavity and deformably abuts between the core body and the valve seat in a sliding direction of the valve core.

In an embodiment, the valve cavity includes a first cavity and a second cavity selectively connecting with the first cavity, the valve core includes a core body, a valve stem connected to the core body, and a reset member, the core body is slidably accommodated in the first cavity in a direction toward or away from the second cavity, the valve stem movably passes through the second cavity in an axial direction of the valve stem and protrudes from the main body, and the reset member abuts between the valve seat and the valve stem.

In an embodiment, a gap is provided between an outer contour of the air inlet hole and an outer contour of a cross section where the core body at the open position contacts the air inlet hole.

In an embodiment, the high-pressure cleaning machine is a handheld high-pressure cleaning machine, the handheld high-pressure cleaning machine includes 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.

A handheld high-pressure cleaning machine is provided, including a handheld portion, a motor, a water pump driven by the motor, and a nozzle device, where 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 includes:a main body, where 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; andan exhaust valve, arranged on a path between a liquid outlet of the water pump and the liquid discharge port, where the exhaust valve is arranged in parallel with the water outlet channel and includes:a valve seat, provided with a valve cavity capable of connecting with the water outlet channel; anda valve core, movably arranged in the valve cavity; wherethe 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 water outlet channel and the main exhaust passage are arranged in parallel in the main body, 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 an embodiment, the main body includes a nozzle and a spray rod detachably joined to an end of the nozzle, 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.

In an embodiment, the main body includes a nozzle, the water outlet channel is formed in the nozzle, and the exhaust valve is assembled in the nozzle.

In an embodiment, the liquid discharge port is provided in the nozzle, and the nozzle is provided with an exhaust port; andthe air outlet hole and the exhaust port are integrally arranged, and an opening direction of the exhaust port is consistent with an opening direction of the liquid discharge port; orthe air outlet hole and the exhaust port are independently arranged, and an opening direction of the exhaust port is consistent with an opening direction of the liquid discharge port.

In an embodiment, a central axis of the exhaust port is parallel or perpendicular to a central axis of the liquid discharge port.

In an embodiment, the exhaust port and the liquid discharge port are located on a same end surface.

In an embodiment, the air outlet hole and the exhaust port are independently arranged, the nozzle casing includes 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, and one of the plurality of exhaust ports connects with the air outlet hole along with rotation of the cover body.

In an embodiment, an auxiliary exhaust passage connecting with the main exhaust passage and the exhaust port is formed in the nozzle casing, and the water outlet channel and the auxiliary exhaust passage are provided on two opposite sides of the central axis.

In an embodiment, there are a plurality of liquid discharge ports, and the plurality of liquid discharge ports are circumferentially arranged on the cover body around the central axis; andone of the plurality of liquid discharge ports connects with the water outlet channel along with rotation of the cover body.

In the handheld high-pressure cleaning machine provided in this application, the exhaust valve is provided, and the exhaust valve implements an exhaust function at the open position, to meet a requirement of vacuum in the pump; and the exhaust valve 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.

DETAILED DESCRIPTION

For ease of understanding the present invention, the present invention is described more comprehensively below with reference to the accompanying drawings. The accompanying drawings show exemplary embodiments of the present invention. However, the present invention may be implemented in many different forms, and is not limited to the embodiments described in this specification. On the contrary, the embodiments are provided to make understanding of the disclosed content of the present invention more comprehensive.

It should be noted that, when a component is referred to as “being fixed to” another component, the component may be directly on the another component, or there may be an intermediate component. When a component is considered to be “connected to” another component, the component may be directly connected to the another component, or there may be an intermediate component.

Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as that usually understood by a person skilled in the technical field to which the present invention belongs. In this specification, terms used in the specification of the present invention are merely intended to describe objectives of the specific embodiments, but are not intended to limit the present invention. The term “and/or” used in this specification includes any and all combinations of one or more related listed items.

Referring toFIG.1, in an exemplary embodiment of the present invention, a nozzle device30is applied to a high-pressure cleaning machine, to spray pumped water during the use of the high-pressure cleaning machine, to implement a cleaning function. In this specific embodiment, the high-pressure cleaning machine is a handheld high-pressure cleaning machine. It may be understood that, in some other embodiments, the nozzle device30may also be applied to a high-pressure cleaning device of another type, for example, a vertical high-pressure cleaning machine, a spray gun, and the like.

Descriptions are provided below by using an example in which the nozzle device30is applied to a handheld high-pressure cleaning machine100. The example is merely used for exemplary purposes, and does not constitute a limitation on the technical scope of this application.

The handheld high-pressure cleaning machine100includes a handheld portion10and the nozzle device30joined to the handheld portion10. The handheld portion10includes a casing11that is roughly pistol-shaped, functional components (not shown in the figure) arranged in the casing11, a handle15for holding, and a startup switch17. The casing11has a structure with a left half and a right half. That is, a first half casing and a second half casing are connected to form the casing. The functional components include components that are used to pump an external water source, and are, for example, a motor13, a water pump driven by the motor, and a water inlet valve. The startup switch17is arranged near the handle15, and is specifically a trigger. A user pulls the trigger to trigger connection between the external water source and the water pump. The motor rotates, and external water enters the water pump under a suction force and is sprayed through the nozzle device30, to implement a cleaning function.

In this specific embodiment, for a requirement of portability, the handheld high-pressure cleaning machine100does not have a water tank for storing a water source. Instead, the handheld high-pressure cleaning machine is connected to a water inlet pipe by a water inlet of the handheld portion10, and the water inlet pipe is then connected to an external water source. The external water source may be a pond, a faucet or the like. In addition, the handheld portion further includes a battery pack mounting portion for connecting a battery pack. The handheld high-pressure cleaning machine100is powered by a battery pack with a DC power supply, to prevent the use distance and environment of the handheld high-pressure cleaning machine100from being restricted by a power cable. It may be understood that, in some other embodiments, the handheld high-pressure cleaning machine100may have a water storage device for storing a water source. In addition, the handheld high-pressure cleaning machine may alternatively be powered and driven by using a battery pack and an external power supply or only by using an external power supply. This is not limited herein.

Referring toFIG.2, the nozzle device30includes a main body31and an exhaust valve33. The main body31is joined to the handheld portion10, and is used for spraying high-pressure water. The exhaust valve33provides a passage for internal air that is discharged when the handheld high-pressure cleaning machine100is started.

Specifically, a water outlet channel310is provided in the main body31, and a front end of the main body31is provided with at least one liquid discharge port313connecting with the water outlet channel310. A pumped high-pressure water stream passes through the water outlet channel310and is sprayed from the liquid discharge port313connecting with the water outlet channel310.

The handheld high-pressure cleaning machine sucks water from an external water source into the water pump through the water inlet pipe connected to the water inlet, and discharges the water after the water is pressurized by the water pump. Therefore, in an initial working stage of the handheld high-pressure cleaning machine, the water pump needs to empty air in the water inlet pipe before the water pump can suck water from the external water source into the water pump. When water from the external water source starts to be sucked into the water pump but the nozzle still does not spray water normally, the initially sucked water and air are mixed and compressed and are discharged to the water outlet channel. If the water outlet channel has no exhaust structure, on one hand, air accumulates in the water outlet channel to form a high-pressure region, it is difficult to empty the air in the water pump, and consequently, the handheld high-pressure cleaning machine cannot discharge a water stream that meets a pressure requirement. On the other hand, the water and air in the water pump are mixed and compressed to form cavitation bubbles. The cavitation bubbles burst to produce noise and vibration, resulting in relatively great noise and vibration of the handheld high-pressure cleaning machine. According to some embodiments of the present invention, the exhaust valve33is arranged between a liquid outlet of the water pump and the liquid discharge port313of the nozzle, to discharge in time gas mixed in the water outlet channel, to reduce the air pressure in the water outlet channel, so that air in the water pump can be successfully emptied, and the handheld high-pressure cleaning machine can work normally to discharge a water stream that meets the pressure requirement and has low noise and vibration.

The exhaust valve33is connected to the main body31, and includes a valve seat330and a valve core332. The valve seat330is provided with a valve cavity3302capable of connecting with the water outlet channel310. The valve core332is arranged in the valve cavity3302and movable relative to the valve cavity3302.

The nozzle device30is further provided with an exhaust port315connecting with external air. The exhaust port315can connect with the water outlet channel310. The valve cavity3302is located on a connecting path between the exhaust port315and the water outlet channel. The valve core332is movable relative to the valve cavity3302to an open position for connecting the exhaust port315and the water outlet channel310and a closed position for blocking the exhaust port315and the water outlet channel310.

Specifically, the valve seat330is provided with an air inlet hole3304and an air outlet hole3306, the air inlet hole3304connects with the water outlet channel310and the valve cavity3302, the air outlet hole3306connects with the valve cavity3302, and the air inlet hole3304, the valve cavity3302, and the air outlet hole3306together form a main exhaust passage connecting with external air and the water outlet channel310. The water outlet channel310and the main exhaust passage are arranged in parallel in the main body31. When the valve core332moves relative to the valve cavity3302to the closed position, the valve core332blocks the main exhaust passage, and the exhaust port315does not connect with the water outlet channel310. When the valve core332moves relative to the valve cavity3302to the open position, the valve core332opens the main exhaust passage, and the exhaust port315connects with the water outlet channel310.

When the water outlet channel310and the main exhaust passage are arranged in parallel, the water outlet channel310used for discharging liquid and the main exhaust passage used for exhausting gas are provided as two branches. That is, the functions of the water outlet channel and the main exhaust passage are independent of each other and do not affect each other.

When the handheld high-pressure cleaning machine100is started and water still does not spray from the nozzle, water and gas mainly mix in the water outlet channel, and there is a particular pressure, so that the valve core332is located at the open position relative to the valve cavity3302. After entering and passing through the main exhaust passage via the air inlet hole3304, internal air passes through the air outlet hole3306and is finally discharged from the exhaust port315. When the handheld high-pressure cleaning machine100enters a working state after the startup, the water outlet channel is filled with a high-pressure water stream, and the water stream with a sufficient pressure presses the valve core332to compress a reset member, so that the valve core332moves relative to the valve cavity3302to the closed position, the main exhaust passage is blocked, and the high-pressure water is directly sprayed through the water outlet channel310under a vacuum environment.

Referring toFIG.3, in a first structure, the main body31only includes a nozzle, and the main body31is directly detachably joined to the handheld portion10by the nozzle.

Specifically, the nozzle includes a nozzle casing314, and the water outlet channel310is provided in the nozzle casing314. The nozzle casing314includes a body3141and a cover body3143with a central axis a, and the cover body3143is circumferentially rotatably joined outside the body3141around the central axis a.

There are a plurality of liquid discharge ports313. The plurality of liquid discharge ports313are circumferentially arranged on the cover body3143around the central axis a, and one of the plurality of liquid discharge ports313connects with the water outlet channel310along with rotation of the cover body3143. The plurality of liquid discharge ports313all have different shapes, so that during use, a user may select one required liquid discharge port313according to a requirement of a different working condition, to spray a water stream of a matching shape. For example, the shape of the liquid discharge port313may be one or a combination of two or more of a circle, an ellipse, and a square. It may be understood that, in some other embodiments, the shape of a spout of the liquid discharge port313may be determined as required, which is not limited herein.

Further, the cover body3143includes a plurality of reinforcing ribs3149, and each reinforcing rib3149is arranged between two adjacent liquid discharge ports313. One end of each reinforcing rib3149is connected to a central position of the cover body3143, and the other end extends to the edge of the cover body3143, to separate two adjacent liquid discharge ports313and reinforce the strength of the cover body3143.

Referring toFIG.4,FIG.5,FIG.6, andFIG.7, the exhaust valve33is arranged in the nozzle casing314, so that the exhaust port315is relatively close to the liquid discharge port313. The gas mixed with liquid discharged from the exhaust port315can be relatively close to a cleaning liquid stream discharged from the liquid discharge port313, and the gas mixed with liquid discharged from the exhaust port315is mixed with the cleaning liquid stream. If the exhaust port315is relatively far away from the nozzle, a user may misjudge that the high-pressure cleaning machine is leaking. In addition, the high-pressure cleaning machine inevitably wets unexpected places during use, which affects user experience. The exhaust valve33and the nozzle casing314may be arranged in the following manners:

Referring toFIG.4andFIG.5, the body3141of the nozzle casing314is provided with the exhaust port315matching the exhaust valve33. The exhaust port315can discharge gas that enters the main exhaust passage through the air inlet hole3304to the outside. The exhaust valve33is arranged on the body3141of the nozzle casing314, and the air outlet hole3306in the exhaust valve33and the exhaust port315are integrated. That is, the air outlet hole3306in the exhaust valve33is the air outlet hole3306of the main exhaust passage and is also the exhaust port315in the nozzle casing314. The air outlet hole and the exhaust port are integrated. In other words, in this structure, an air outlet end of the exhaust valve33is exposed from the body3141. That is, the air outlet hole3306of the exhaust valve33directly discharges gas passing through the main exhaust passage to the outside.

Referring toFIG.4, in an embodiment, the exhaust valve33is transversely arranged in the body3141in the horizontal direction, or the exhaust valve33is transversely arranged in the horizontal direction and connected to the outside of the body3141. In this case, an opening direction of the exhaust port315is consistent with an opening direction of the liquid discharge port313. The consistent opening directions indicate that an opening of the exhaust port315and an opening of the liquid discharge port313face a same side, or a central axis of the exhaust port is basically parallel to a central axis of the liquid discharge port. That is, an angle between the two central axes is not greater than 20°. In an embodiment, the opening direction of the exhaust port315is basically perpendicular to the opening direction of the liquid discharge port313, as shown inFIG.5.

Further, the exhaust port315and the liquid discharge port313are located on a same end surface. That is, one end of the exhaust valve33provided with the exhaust port315is basically flush with a surface of the cover body3143provided with the liquid discharge port313.

Referring toFIG.5, in another embodiment, the exhaust valve33is arranged in the body3141in the vertical direction, or the exhaust valve33is connected to the outside of the body3141in the vertical direction. The exhaust valve33further includes a press cap351, and the body3141is provided with an accommodating cavity below the exhaust valve33. The press cap351detachably seals the accommodating cavity and is supported at a lower end of the exhaust valve33to protect the exhaust valve33. In addition, during subsequent maintenance, the exhaust valve33can be replaced or maintained independently by only removing the press cap351instead of replacing the nozzle device30as a whole. In addition, the air outlet hole3306penetrates from the exhaust valve33to the press cap351, so that the air outlet hole3306and the exhaust port315are integrally arranged. In this case, the opening direction of the exhaust port315is basically perpendicular to the opening direction of the liquid discharge port313.

Referring toFIG.2andFIG.7, in this embodiment, the exhaust valve33is arranged in the body3141in the vertical direction, and the exhaust valve33further includes a press cap35. In this embodiment, a connection structure of the press cap is basically the same as that of the press cap351in the embodiment shown inFIG.5. The difference lies in that the air outlet hole3306does not penetrate the press cap35, but connects with the outside through the body3141.

In another embodiment, the exhaust valve33is arranged in the cover body, and a quantity of exhaust valves is in one-to-one correspondence with a quantity of exhaust ports. Specifically, the cover body3143is provided with a plurality of exhaust ports315matching the exhaust valve33, and the plurality of exhaust valves33and the plurality of exhaust ports315are arranged in one-to-one correspondence. The plurality of exhaust ports315are circumferentially arranged on the cover body around the central axis. There are a plurality of liquid discharge ports313. The plurality of liquid discharge ports313are circumferentially arranged on the cover body3143around the central axis. The cover body3143is operable to rotate circumferentially around the central axis to select one of the plurality of liquid discharge ports313to connect with the water outlet channel310. In this case, one of the exhaust ports315connects with the air outlet hole3306, that is, connects with the exhaust channel312.

Referring toFIG.6andFIG.7, the cover body3143of the nozzle casing314is provided with a plurality of exhaust ports315matching the exhaust valve33, and the exhaust valve33is arranged in the body3141. In this case, the air outlet hole3306and the exhaust port315are independently arranged, and an opening direction of the exhaust port315is consistent with an opening direction of the liquid discharge port313. The consistent opening directions indicate that an opening of the exhaust port315and an opening of the liquid discharge port313face a same side, or a central axis of the exhaust port is basically parallel to a central axis of the liquid discharge port. That is, an angle between the two central axes is not greater than 20°.

Specifically, there are a plurality of exhaust ports315. The plurality of exhaust ports315are circumferentially arranged on the cover body3143around the central axis a, and one of the plurality of exhaust ports315connects with the exhaust channel312along with rotation of the cover body3143.

In this embodiment, there are a plurality of liquid discharge ports313. The plurality of liquid discharge ports313are circumferentially arranged on the cover body3143around the central axis. The cover body3143is operable to rotate circumferentially around the central axis to select one of the plurality of liquid discharge ports313to connect with the water outlet channel310. In this case, one of the exhaust ports315connects with the air outlet hole3306, that is, connects with the exhaust channel312.

In this specific embodiment, the liquid discharge ports313and the exhaust ports315have a one-to-one correspondence with respect to the central axis a. That is, when the cover body3143is rotated, while one liquid discharge port313of the plurality of liquid discharge ports313connects with the water outlet channel310, one exhaust port315of the plurality of exhaust ports315connects with the main exhaust passage, so that each time the cover body rotates, the corresponding liquid discharge port313and exhaust port315cooperate with each other to implement functions of spraying by the nozzle device30and exhausting by the exhaust valve33. Specifically, four liquid discharge ports313are evenly arranged circumferentially with the central axis a as the center, and four exhaust ports315are also evenly arranged circumferentially with the central axis a as the center. Connection lines between the four liquid discharge ports313and connection lines between the four exhaust ports315respectively form an outer circle and an inner circle centered on the central axis a. That is, a central angle between two adjacent liquid discharge ports313is 90°.

Still referring toFIG.6, in still another embodiment, the exhaust valve33is arranged at a front end, close to the cover body3143, of the body3141, and the air outlet hole3306is provided on a surface, facing the cover body3143, of the body3141. An auxiliary exhaust passage317connecting with the main exhaust passage and the water outlet channel310is formed in the body3141of the nozzle casing314. In this case, an axis on which the auxiliary exhaust passage317is located is perpendicular to an axis on which the exhaust port315is located, and an axis on which the main exhaust passage in the exhaust valve33is located is basically parallel to the axis on which the exhaust port315is located (as shown inFIG.6, specifically, the exhaust valve33is horizontally arranged in the body3141).

Referring toFIG.7, in yet another embodiment, the exhaust valve33is arranged at a rear end, away from the cover body3143, of the body3141, and the auxiliary exhaust passage317connecting with the main exhaust passage and the exhaust port315is formed in the body3141of the nozzle casing314. That is, the auxiliary exhaust passage317penetrates the air outlet hole3306in the exhaust valve33and the surface, facing the cover body3143, of the body3141. In this case, the water outlet channel310and the auxiliary exhaust passage317are arranged on two opposite sides of the central axis, the axis on which the auxiliary exhaust passage317is located is parallel to the axis on which the exhaust port315is located, and the axis on which the exhaust valve33is located is perpendicular to the axis on which the exhaust port315is located (as shown inFIG.7, the exhaust valve33is vertically arranged in the body3141).

Further, the auxiliary exhaust passage317includes an air inlet end connecting with the exhaust valve33and an air outlet end corresponding to the air inlet end and connecting with the outside. A hole diameter of the air outlet end is greater than a hole diameter of the air inlet end, to provide buffer for airflow discharge, so as to avoid an increase in an air pressure in the exhaust valve33due to slow airflow discharge. It may be understood that, in some other embodiments, positions of the exhaust channel312, the exhaust valve33, and the exhaust port315and angles between axes thereof may be determined as required, provided that air in the handheld high-pressure cleaning machine100is discharged by mutual cooperation to form a vacuum environment. This is not limited herein.

Referring toFIG.2again, in a second structure, the main body31includes a nozzle and a spray rod316arranged between the nozzle and the high-pressure cleaning machine Specifically, the spray rod316is detachably joined to an end of the nozzle, and the main body31is detachably joined to the handheld portion10by the spray rod316. That is, the spray rod316connects the nozzle and the handheld portion10. The water outlet channel310extends from the spray rod to the nozzle. The exhaust valve33is arranged in the main body31and is located on a path between a liquid outlet of the water pump and the liquid discharge port313, to discharge internal air when the handheld high-pressure cleaning machine100is started, so as to form a vacuum in the water pump and generate a pressure difference, so that water is sucked into the pump from the water inlet pipe to generate a high-pressure water stream, thereby implementing an automatic water-suction function. When the exhaust valve33is arranged on the path between the liquid outlet of the water pump and the liquid discharge port313, it should be understood that the exhaust valve connects with the liquid outlet of the water pump and the liquid discharge port313.

Specifically, the exhaust valve33is assembled on the spray rod and the air outlet hole3306is exposed from the spray rod316. The main exhaust passage and the water outlet channel310are arranged in parallel, to implement a water discharge function through the water outlet channel310and implement an exhaust function through the main exhaust passage, thereby finally implementing high-pressure spraying and low-pressure self-suction functions of the handheld high-pressure cleaning machine100. In this embodiment, the nozzle is detachably assembled on the handheld portion10through the spray rod, and is mainly applied to working conditions with a long shooting range and a wide spraying range.

In yet another embodiment, the exhaust valve33is arranged in the handheld portion10and located at the liquid outlet of the water pump, to directly discharge air in the water pump to form a vacuum in the water pump.

Referring toFIG.8, in the foregoing embodiment, the valve cavity3302includes a first cavity3311and a second cavity3312. The first cavity3311is in fluid connection with the water outlet channel310, and the second cavity3312is in fluid connection with the first cavity3311. The air outlet hole3306penetrates a cavity wall of the second cavity3312. At the closed position, the valve core332sealingly blocks a position at which the first cavity3311connects with the second cavity3312.

The valve core332includes a core body3321and a reset member3323. The core body3321is slidably accommodated in the first cavity3311in a direction toward or away from the second cavity3312. The reset member3323is accommodated in the second cavity3312and deformably abuts between the core body3321and the valve seat330in a sliding direction of the valve core332.

Referring toFIG.8, in a first embodiment, the first cavity3311and the second cavity3312are both round holes with constant inner diameters in the axial direction. The inner diameter of the first cavity3311is greater than the inner diameter of the second cavity3312, so that a step is formed between the first cavity3311and the second cavity3312. The exhaust valve33includes a seal ring334. The seal ring334is a circular ring supported on the step. The core body3321is a steel ball matching the seal ring334in shape. It may be understood that, in some other embodiments, the shape of the seal ring334and the shape of the core body3321may be determined as required, provided that the seal ring and the core body can seal the end at which the first cavity3311connects with the second cavity3312when the valve core332is at the closed position relative to the valve seat330. This is not limited herein.

When the handheld high-pressure cleaning machine100is started, the reset member3323is in a normal state. The core body3321is supported on the reset member3323and protrudes from the seal ring334to form a particular gap with the seal ring334. After entering the first cavity3311through the air inlet hole3304, internal air enters the second cavity3312through the gap, and is discharged from the air outlet hole3306, to implement the exhaust function.

When the handheld high-pressure cleaning machine100is working, while high-pressure water enters the pump and flows through the water outlet channel310, the high-pressure water acts on the core body3321after entering the first cavity3311through the air inlet hole3304, and the reset member3323is compressed. The core body3321moves toward the seal ring334and is stopped outside the seal ring334under the continuous pressure of high-pressure water, to seal, together with the seal ring334, the gap between the first cavity3311and the second cavity3312, to prevent water from entering.

It may be understood that, in other embodiments, the first cavity3311and the second cavity3312may both be round holes with constant inner diameters in the axial direction. That is, the first cavity3311connects with the second cavity3312to form a straight through hole with a constant inner diameter in the axial direction. The seal ring334is arranged at one end, connecting with the second cavity3312, of the first cavity3311. An inner diameter of a part, provided with no seal ring334, of the first cavity3311is greater than an outer diameter of the core body3321, and an inner diameter of the seal ring334is less than the outer diameter of the core body3321.

Referring toFIG.9andFIG.10, in a second embodiment, compared with the first embodiment, the first cavity3311is a conical hole whose inner diameter changes in the axial direction, and includes a wide opening3313and a narrow opening3314connected between the wide opening3313and the second cavity3312. A minimum inner diameter of the wide opening3313is greater than a maximum outer diameter of the core body3321, and a maximum inner diameter of the narrow opening3314is less than the maximum outer diameter of the core body3321.

Referring toFIG.9, when the handheld high-pressure cleaning machine100is started, the reset member3323is in a free state. The core body3321is supported on the reset member3323and protrudes from the narrow opening3314to form a particular gap with the narrow opening3314. After entering the first cavity3311through the air inlet hole3304, internal air enters the second cavity3312through the gap between the wide opening3313and the core body3321, and is discharged from the air outlet hole3306to the exhaust channel312, to implement the exhaust function.

Referring toFIG.10, when the handheld high-pressure cleaning machine100is working, while high-pressure water enters the pump and flows through the water outlet channel310, the high-pressure water acts on the core body3321after entering the first cavity3311through the air inlet hole3304, and the reset member3323is compressed. The core body3321moves toward the narrow opening3314and is stopped at the narrow opening3314under the continuous pressure of high-pressure water, to seal, together with the narrow opening3314, the gap between the first cavity3311and the second cavity3312, to prevent water from entering.

In this specific embodiment, the core body3321is a sealing plug with an inverted U-shaped cross-section. A closed end of the core body3321is connected to the reset member3323, and an open end of the core body3321connects with the air inlet hole3304, so that when a high-pressure water stream flows into the water outlet channel310, the water stream flows into the first cavity3311through the air inlet hole3304and applies, through the open end of the core body3321, a pressure to the entire core body3321to compress the reset member3323.

Referring toFIG.11, in a third embodiment, compared with the first embodiment, the core body3321is a structure with an I-shaped cross-section. The exhaust valve33includes the seal ring334, and the seal ring334is nested in an opening of the I-shaped core body3321. When the core body3321is at the closed position, the seal ring334blocks the narrow opening3314in a sealing manner.

Referring toFIG.12andFIG.13, in a fourth embodiment, the valve core332includes the core body3321, the reset member3323, and a valve stem3325connected to the core body3321. The core body3321is slidably accommodated in the first cavity3311in a direction toward or away from the second cavity3312. The valve stem3325movably passes through the second cavity3312in an axial direction of the valve stem and protrudes from the main body31. The reset member3323is sleeved in the valve stem3325and abuts between the valve seat330and the valve stem3325, to provide the valve core332with a restoring force from the closed position to the open position. That is, in this embodiment, the exposed valve stem3325is used to manually control opening or closing of the core body3321relative to the valve cavity3302.

In the foregoing first to fourth embodiments, a gap is provided between an outer contour of the air inlet hole3304and an outer contour of a cross section where the core body3321at the open position contacts the air inlet hole3304. That is, the shape of the air inlet hole3304does not completely match the shape of the core body3321, and there is an air inlet gap between the air inlet hole and the core body. Preferably, the air inlet hole3304is a polygonal hole, for example, a hexagonal hole or an octagonal hole, so that even when the core body3321blocks the air inlet hole3304, the core body and the air inlet hole are not completely sealed, thereby avoiding a failure in the exhaust function.

In the nozzle device30of the handheld high-pressure cleaning machine100, different embodiments of the main body31and different embodiments of the exhaust valve33may be randomly combined as required, provided that corresponding functions are normally implemented. The combination manner of different embodiments of the main body and the exhaust valve is not limited herein.

In the handheld high-pressure cleaning machine100provided in this application, the exhaust valve33is provided, and the exhaust valve33implements an exhaust function at the open position, to meet a requirement of vacuum in the pump, and the exhaust valve33implements 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.

The foregoing embodiments merely describe several implementations of the present invention and are described in detail, but cannot be construed as a limitation to the patent scope of the present invention. It should be noted that, a person of ordinary skill in the art may further make some variations and improvements without departing from the concept of the present invention, which shall fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.