Water inlet assembly and high-pressure cleaner

Abstract

The present application relates to a water inlet assembly and a high-pressure cleaner, wherein the water inlet assembly is used in the high-pressure cleaner. The water inlet assembly comprises a water inlet end, a water inlet port connected to the water inlet end, and a flow guide arranged in the water inlet port. The water inlet assembly is arranged with a water inlet part and a water outlet part, which are arranged on two sides of the water inlet assembly, and a water inlet chamber located between the water inlet part and the water outlet part; wherein external water flow is configured to enter from the water inlet part, pass through the flow guide, and be discharged from the water outlet part.The flow guidance system comprises a support plate located near the water inlet, a filter cartridge extending from one end face of the support plate, and a flow guide feature located on the other end face of the support plate. The external water flow entering from the water inlet is configured to be guided by the flow guide feature, impinge upon the filter cartridge in a spiral flow pattern, and pass through the filter cartridge, separating any dirt carried in the external water flow and collecting it in the water inlet chamber. Equipping the pressure washer with this water inlet assembly enables it to offer advantages such as good filtration performance and high water inlet efficiency.

Description

Water inlet assembly and high-pressure cleaning machine TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to a water inlet assembly and a high-pressure cleaning machine using the same. BACKGROUND

[0002] The high-pressure cleaning machine is widely used for cleaning vehicles, courtyards, ground, etc. Its working principle is generally that a plunger is reciprocated by a motor assembly to form high-pressure water in a pump and to be sprayed outward through a nozzle to achieve the purpose of washing articles. The external water flow is generally delivered to the pump through a water inlet assembly, which is favored by users due to its simple structure and low cost.

[0003] However, the existing water inlet assembly is generally a water inlet connector, which does not have the function of filtering stain particles. If the water source containing stain particles is sucked into the pump, the pressure boosting performance of the pump will be inevitably reduced, and the service life of the high-pressure cleaning machine will be seriously shortened.

[0004] In view of this, it is necessary to provide an improved water inlet assembly and high-pressure cleaning machine to overcome the defects of the prior art. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a water inlet assembly and a high-pressure cleaning machine using the same, which has good filtering performance and high water inlet efficiency.

[0006] The present application solves the problems of the prior art by adopting the following technical scheme: a water inlet assembly includes a water inlet end, a water inlet connector connected to the water inlet end, and a drainage device installed in the water inlet connector. The water inlet assembly has water inlet and outlet portions on both sides and a water inlet chamber between the water inlet and outlet portions. External water flow enters from the water inlet portion, flows through the drainage device, and is discharged from the water outlet portion. The drainage device has a support disc near the water inlet portion, a filter cartridge extending from one side of the support disc, and a drainage feature provided on the other side of the support disc. The external water flow entering from the water inlet portion is guided by the drainage feature and impinges on the filter cartridge in a spiral flow manner. The external water flow passes through the filter cartridge, and the stain carried in the external water flow is separated and collected in the water inlet chamber.

[0007] Further improvement is that the drainage feature has a base installed in the center of the support disc and a drainage rib spirally extending from the base towards the edge of the support disc. The drainage rib is formed by a first curved edge and a second curved edge opposite to the first curved edge.

[0008] Further improvement is that the end of the first curved edge close to the base and the end of the second curved edge close to the base form a drainage proximal end, the end of the first curved edge away from the base and the end of the second curved edge away from the base form a drainage distal end, and the width of the drainage rib decreases from the drainage proximal end to the drainage distal end.

[0009] Further improvement is that the end of the drainage distal end converges into a point.

[0010] Further improvement is that the drainage device has a drainage outlet connected to the filter cartridge, the drainage outlet includes a transition section connected to the filter cartridge, a straight section extending from the transition section, and an outlet flange protruding from the outer periphery of the straight section, the outlet flange abuts the inner wall of the water inlet end, and the water inlet chamber is formed by the inner wall of the water inlet connector, the inner wall of the water inlet end, and the outlet flange.

[0011] Further improvement is that the support disc has a radially extending lug, the outlet flange, the lug, and the water inlet chamber form a sump chamber, the filter cartridge has a filter cartridge body and a protruding rib radially extending from the filter cartridge body, and the protruding rib divides the sump chamber into a first sump chamber on the lower side and a second sump chamber on the upper side.

[0012] Further improvement is that the inner wall of the water inlet connector is provided with a first limiting portion and a second limiting portion spaced from the first limiting portion, the lug abuts the first limiting portion, and the water inlet end abuts the second limiting portion.

[0013] Further improvement is that the outer side of the water inlet connector is provided with an identification portion, and the identification portion indicates the disassembly direction of the water inlet connector.

[0014] Further improvement is that the water flow inlet portion is located on the lower side of the water inlet connector, and the water flow outlet portion is located on the upper side of the straight section.

[0015] The present application solves the problems of the prior art and can also adopt the following technical scheme: A high-pressure cleaning machine comprises a machine shell, a motor assembly accommodated in the machine shell, a pump unit driven to operate by the motor assembly, and a water inlet assembly connected to the pump unit, the water inlet assembly comprises a water inlet connector and a flow guide device installed in the water inlet connector, the water inlet assembly has water inlet and outlet portions arranged on two sides and a water inlet chamber located between the water inlet and outlet portions, external water flow enters from the water inlet portion, flows through the flow guide device, and is guided to the pump unit from the water outlet portion, the flow guide device has a support disc close to the water inlet portion, a filter cartridge extending from one side end surface of the support disc, and a flow guide feature arranged on the other side end surface of the support disc, the external water flow entering from the water inlet portion is guided by the flow guide feature and impacts the filter cartridge in a spiral flow manner, the external water flow passes through the filter cartridge, and stains carried in the external water flow are separated and collected in the water inlet chamber.

[0016] Further improvement is that the water inlet assembly has a water inlet end connected to the pump unit, and the water inlet end is located between the water inlet connector and the flow guide device in the radial direction.

[0017] Further improvement is that the flow guide feature has a base installed in the center of the support disc and a flow guide rib extending spirally from the base towards the edge of the support disc, the flow guide rib is formed by a first curved edge and a second curved edge arranged opposite to the first curved edge, the end of the first curved edge close to the base and the end of the second curved edge close to the base form a proximal end of the flow guide, the end of the first curved edge away from the base and the end of the second curved edge away from the base form a distal end of the flow guide, the width of the flow guide rib decreases from the proximal end to the distal end, and the end of the distal end converges into one end point, and the number of the end points is three.

[0018] Further improvement is that the support disc has a radially extending lug, and the flow guide rib is located radially inside the lug.

[0019] Further improvement is that the filter cartridge comprises a cylindrical filter cartridge body and a filter cartridge chamber arranged in the filter cartridge body, the filter cartridge body is penetrated by a plurality of filter holes, and the filter holes are communicated with the filter cartridge chamber.

[0020] Further improvement is that one side of the filter cartridge close to the water outlet portion is provided with an outlet flange, the water inlet chamber is formed by the inner wall of the water inlet connector, the inner wall of the water inlet end, and the outlet flange, the support disc, the outlet flange, and the water inlet chamber form a dirt collection chamber, and the length of the dirt collection chamber in the up-down direction is greater than the length of the filter cartridge chamber in the up-down direction.

[0021] The present application solves the problems of the prior art and can also use the following technical solutions: A high-pressure cleaning machine, comprising a machine shell, a motor assembly accommodated in the machine shell, a pump unit driven to operate by the motor assembly, and a water inlet assembly connected to the pump unit, the water inlet assembly comprising a water inlet connector and a flow guide device installed in the water inlet connector, the water inlet assembly having water inlet and outlet portions arranged on both sides and a water inlet chamber located between the water inlet and outlet portions, the flow guide device having a support disc close to the water inlet portion, a filter cartridge extending from one side end surface of the support disc, and a flow guide feature arranged on the other side end surface of the support disc, the filter cartridge being provided with an outlet flange close to one side of the water outlet portion, the support disc and the outlet flange surrounding the sump chamber, external water flow entering from the water inlet portion being guided by the flow guide feature and impacting the filter cartridge, external water flow passing through the filter cartridge, and stains carried in the external water flow being separated and collected into the sump chamber.

[0022] Further improvements are: the flow guide feature has a base installed in the center of the support disc and a flow guide rib spirally extending from the base towards the edge of the support disc, external water flow entering from the water inlet portion being guided by the flow guide rib and impacting the filter cartridge in a spiral flow manner.

[0023] Further improvements are: a radially extending convex rib is arranged between the support disc and the outlet flange, the convex rib dividing the sump chamber into a first sump chamber located on the lower side and a second sump chamber located on the upper side.

[0024] Further improvements are: the water inlet assembly has a water inlet end connected to the pump unit, the outlet flange abutting the inner portion of the water inlet end, and the water inlet end being located on the upper side of the convex rib.

[0025] Further improvements are: the support disc has a plurality of lugs radially protruding from the edge, the number of convex ribs is a plurality, and the convex ribs are located on the upper side of the lugs, each of the lugs having a corresponding convex rib in the up-down direction.

[0026] Compared with the prior art, the application has the beneficial effects that: the water inlet assembly is provided with a flow guiding device, external water flow entering from the water flow inlet part is guided by the flow guiding feature and impacts the filter cylinder in a spiral flow manner, when the external water flow passes through the filter cylinder, stains carried in the external water flow are separated and collected into the water inlet chamber, ensuring the cleanliness of the external water flow, specifically: the flow guiding ribs on the flow guiding feature extend in a spiral extending manner, which can make the external water flow passing through the flow guiding ribs flow spirally, stains carried in the water flow are thrown to the stain collecting cavity under the action of centrifugal force, reducing the probability of stains entering the filter cylinder; when the external water flow impacts the filter cylinder, stain particles remaining on the filter cylinder fall off under the action of impact force, improving the water inlet efficiency; the flow guiding device is provided with an outlet flange outside the flow guiding outlet, when a user removes the flow guiding device, the outlet flange will scrape off stains remaining in the stain collecting cavity, facilitating cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a schematic perspective view of the high-pressure cleaning machine in the application;

[0028] Fig. 2 is a sectional view of the high-pressure cleaning machine shown in Fig. 1;

[0029] Fig. 3 is a schematic view of the internal structure of the high-pressure cleaning machine shown in Fig. 1;

[0030] Fig. 4 is a sectional view of the high-pressure cleaning machine shown in Fig. 1 from another perspective;

[0031] Fig. 5 is a schematic perspective view of the trigger assembly of the trigger system in the high-pressure cleaning machine shown in Fig. 2;

[0032] Fig. 6 is a schematic view of the trigger system in the high-pressure cleaning machine shown in Fig. 2, in which the trigger rod is in the first position relative to the spring sheet;

[0033] Fig. 7 is a schematic view of the trigger system shown in Fig. 6, in which the trigger rod is in the second position relative to the spring sheet;

[0034] Fig. 8 is a schematic view of the trigger system shown in Fig. 7, in which the trigger rod is in the third position relative to the spring sheet;

[0035] Fig. 9 is a schematic view of the structure of the water inlet assembly in the high-pressure cleaning machine shown in Fig. 2;

[0036] Fig. 10 is a schematic view of the structure of the water inlet connector in the water inlet assembly shown in Fig. 9;

[0037] Fig. 11 is a schematic view of the structure of the flow guiding device in the water inlet assembly shown in Fig. 9;

[0038] Fig. 12 is a schematic view of the structure of the flow guiding device shown in Fig. 11 from another perspective;

[0039] Fig. 13 is a schematic view of the structure of the flow guiding feature in the flow guiding device shown in Fig. 12;

[0040] Fig. 14 is a structural diagram of a protection system in the high-pressure cleaner shown in Fig. 2;

[0041] Fig. 15 is a structural diagram of part C of the protection system shown in Fig. 14;

[0042] Fig. 16 is a structural diagram of the protection system shown in Fig. 14 without a sheath for the foot and the battery pack;

[0043] Fig. 17 is a structural diagram of the sheath of the protection system shown in Fig. 14;

[0044] Fig. 18 is an assembly diagram of a second damping element of a damping system and a spray bar system in the high-pressure cleaner shown in Fig. 2;

[0045] Fig. 19 is a structural diagram of a first damping element of the damping system in the high-pressure cleaner shown in Fig. 2;

[0046] Fig. 20 is a structural diagram of the first damping element shown in Fig. 19 from another perspective;

[0047] Meaning of reference numerals in the figure: high-pressure cleaner 100 casing 1 main body 11 input end 111 output end 112 ring seat 113 installation cavity 114 main body plane 115 gripping portion 12 foot 13 first foot flange 131 second foot flange 132 battery pack installation portion 133 drive system 2 motor assembly 21 motor housing 211 stator 212 motor shaft 213 rotor 214 transmission assembly 22 box shell 221 speed reduction mechanism 222 pump unit 3 pump body 31 pressure chamber 311 pump body rib 312 plunger 32 pressure increasing mechanism 33 water inlet end 34 water outlet end 35 water inlet valve 36 water path switch 37 first one-way valve 38 second one-way valve 39 trigger system 4 trigger assembly 41 trigger lever 411 pivot portion 412 trigger cavity 413 support rib 414 trigger lever 415 spring installation portion 416 spring417 trigger axis 418 switch 42 switch body 421 trigger button 422 spring leaf 423 spring leaf end 423a switch axis 423b first acute angle A second acute angle B control system 5 control circuit board 51 operation panel 52 operation button 521 first indication area 522 second indication area 523 water inlet assembly 6 water flow inlet part 6a water flow outlet part 6b water inlet chamber 6c water inlet connector 61 connector chamber 611 first limiting part 612 second limiting part 613 screw part 614 identification part 615 drainage device 62 support disc 621 lug 621a filter cartridge 622 filter cartridge body 622a filter cartridge chamber 622b filter hole 622c convex rib 622d drainage outlet 623 transition section 623a straight section 623b outlet flange 623c drainage feature 624 base 624a drainage rib 624b first curved edge 624c second curved edge 624d drainage proximal end 624e drainage distal end624f drain end point 624g sump chamber 63 first sump chamber 631 second sump chamber 632 seal ring 64 protection system 7 battery pack 71 battery pack base 711 base boss 712 battery pack connecting portion 713 base baffle 714 battery pack button portion 715 battery pack button 716 nameplate portion 717 battery level display portion 718 battery level button 718a battery level indicator 718b sheath 72 sheath base 721 sheath base positioning surface 721a sheath base engaging surface 721b sheath baffle 722 sheath baffle positioning surface 722a sheath baffle engaging surface 722b sheath button portion 723 sheath button hole 723a sheath button engaging surface 723b spray bar system 8 spray tube 81 spray head 82 catch groove 821 spray head boss 822 extension 822a abutment ring 822b boss inner cavity 823 spray seat 83 spray seat cavity 831 large diameter area 832 small diameter area 833 spray seat limiting portion 834 fixing device 84 clamping ring 841 fool-proof element 85 damping system 9first damping element 91 damping base 911 damping side ring 912 damping cavity 913 damping hole 914 second damping element 92 DETAILED DESCRIPTION

[0048] The terms used in the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. For example, the words "upper", "lower", "front", "back", and the like as described below are indicative of orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are used only for convenience in describing the present application and simplifying the description, and thus cannot be understood as indicating or implying that a device / element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0049] Please refer to FIG. 1 to FIG. 4, the embodiment of the present application relates to a high-pressure cleaning machine 100, which is equipped with a water inlet assembly 6, through which external water flow can be sucked in and pressurized and sprayed outward to clean vehicles, courtyards, ground, etc.; the high-pressure cleaning machine 100 comprises a casing 1, a driving system 2 installed in the casing 1, a pump unit 3 driven by the driving system 2, and a battery pack 71 for supplying energy to the driving system 2, and the user can start the high-pressure cleaning machine 100 through a trigger system 4 and a control system 5.

[0050] Please continue to refer to FIG. 1 to FIG. 4, the casing comprises a main body part 11, a holding part 12 extending from the lower end of the main body part 11, and a foot sole 13 connected to the lower end of the holding part 12, the driving mechanism 2 comprises a motor assembly 21 arranged in the main body part 11 and a transmission assembly 22 connected to the lower end of the motor assembly 21, and the motor assembly 21 and the transmission assembly 22 are arranged in the main body part 11; in this embodiment, the motor assembly 21 is an external rotor motor, which comprises a motor housing 211, a stator 212 mounted on the motor housing 211, a rotor 214 connected to the motor housing 211, and a motor shaft 213 fixed to the rotor 214, the transmission assembly 22 comprises a box shell 221 and a speed reduction mechanism 222 mounted in the box shell 221, and the power generated by the rotation of the rotor 214 is transmitted to the speed reduction mechanism 22 through the motor shaft 213.

[0051] The pump unit 3 has a pump body 31 and a pressure chamber 311 formed in the pump body 31 and extending left and right, the pressure chamber 311 is a place where the pump unit 3 pressurizes the external water flow, a plunger 32 extends into the pressure chamber 311 and is connected with a pressure increasing mechanism 33, in this embodiment, the pressure increasing mechanism 33 is preferably a spiral spring; the plunger 32 is driven by the speed reduction mechanism 222 to reciprocate in the left and right directions; the lower end and the left end of the pump body 31 are respectively provided with a water inlet end 34 and a water outlet end 35, the water inlet end 34 and the water outlet end 35 are in communication with each other, and the reciprocating movement of the plunger 32 can pressurize the external water flow entering from the water inlet end 34 and then spray it out from the water outlet end 35.

[0052] The high-pressure cleaner 100 cannot suck the external water flow in the stopped state, and only when the driving system 2 and the pump unit 3 are operated in cooperation can the cleaning operation be carried out, and the driving system 2 needs to trigger the system 4 and the control system 5 to operate jointly.

[0053] Please refer to FIG. 1 to FIG. 2 and FIG. 5 to FIG. 6, the trigger system 4 includes a trigger assembly 41 installed on the main body part 11 and the holding part 12, and a switch 42 installed in the holding part 12, in this embodiment, the switch 42 is preferably a micro switch; specifically, the trigger assembly 41 includes a trigger rod 411 in the shape of a long strip, the upper end of the trigger rod 411 is provided with a circular protrusion-shaped pivot part 412, the trigger rod 411 is rotatably supported on the main body part 11 through the pivot part 412; the right side end surface of the trigger rod 411 is formed with a trigger cavity 413, the inside of the trigger cavity 413 has a support rib 414 protruding from the bottom, the right end surface of the support rib 414 is integrally connected with a trigger rod 415, the trigger rod 415 is in the shape of a cylinder; a spring mounting part 416 is arranged in the area of the trigger cavity 413 below the support rib 414, the spring mounting part 416 connects the trigger rod 411 with the holding part 12 with limitation through a spring 417.

[0054] The side of the trigger rod 411 opposite to the trigger cavity 413 is formed with a pressing surface 411a, the pressing surface 411a is the part that is abutted by the palm of the user, which covers the cavity on the holding part 12 for installing the trigger assembly 41; the end of the pressing surface 411a protrudes to the left with a hook part 419, the hook part 419 is in abutment with the lower end of the user's hand to prevent the user's hand from being clamped into the gap formed between the trigger assembly 41 and the sole 13 when using the high-pressure cleaner 100, which can reduce the risk of injury to the user's hand.

[0055] The switch 42 includes a switch body 421, a trigger button 422 installed on the switch body 421, and a spring piece 423 connected to the switch body 421 and capable of pressing the trigger button 422, the connection part of the spring piece 423 and the switch body 421 is located at the lower end of the switch body 421, and the spring piece 423 can rotate around this connection part.

[0056] Please combine with Fig. 1 and Fig. 2, the control system 5 includes a control circuit board 51 installed on the right upper side of the main body 11 and an operation panel 52 electrically connected to the control circuit board 51, the operation panel 52 has an operation button 521 located at the lower end and a first indication area 522 and a second indication area 523 located above the operation button 521, in this embodiment, the operation button 521 is preferably a thin film switch, the first indication area 522 is used to display the real-time power during the operation of the high-pressure cleaning machine 100, and the second indication area 523 is used to display the pressure parameter during the operation of the high-pressure cleaning machine 100.

[0057] If you want to start the high-pressure cleaning machine 100, the user can first press the trigger lever 415 with his hand to make it rotate, so as to make the trigger lever 415 press the spring sheet 423 while driving the trigger lever 415 to rotate, and indirectly press the trigger button 422 through the spring sheet 423. When the trigger button 422 is pressed, the switch 42 transmits the pressing signal to the control circuit board 51, and the display area 523 on the operation panel 52 is bright, and the machine is in standby state.

[0058] In this embodiment, the trigger lever 415 and the spring sheet 423 have the following positional relationship, please refer to the initial state of the trigger lever 415 and the spring sheet 423 shown in Fig. 6, define that the trigger lever 415 has a trigger axis 418 and the spring sheet 423 has a switch axis 423b, the trigger axis 418 and the switch axis 423b form a trigger included angle A, and the trigger included angle A is an acute angle.

[0059] In order to further describe the process of the trigger lever 415 rotating the trigger switch 42, three node positions are defined in this process: the first position please refer to Fig. 6, at this time the user does not pull the trigger lever 411, the trigger lever 415 does not rotate, and does not contact with the spring sheet 423; the second position please refer to Fig. 7, at this time the trigger lever 415 has rotated a certain angle under the driving of the user pulling the trigger lever 411, however, at this time the trigger lever 415 is only pressed on the spring sheet 423 but does not trigger the trigger button 422; the third position please refer to Fig. 8, at this time the trigger lever 415 has rotated to the limit position, under the action of the trigger lever 415, the spring sheet 423 is pressed and rotated, and the trigger button 422 is indirectly pressed, it should be noted that at this position, if the user applies force again, the trigger button 422 cannot be further pressed, that is, the trigger button 422 can only be partially pressed at the third position, and the angle of rotation of the spring sheet 423 is also small, and the spring sheet end 423a does not contact with the switch body 421.

[0060] Since the trigger axis 418 and the switch axis 423b form a trigger angle A, the trigger lever 415 can be caused to move in a sliding manner during contact with the elastic piece 423, that is, the end of the trigger lever 415 slides on the surface of the elastic piece 423 during the process from the second position to the third position; the sliding triggering manner of the trigger lever 415 makes the trigger button 422 unable to be pressed to the bottom, which can prevent the damage of the trigger lever 415 and the switch 42 caused by excessive force of the user, improves the service life of the trigger system 4, and the sliding triggering of the trigger lever 415 also makes the user obtain a more comfortable operation experience.

[0061] After the operation panel 52 is activated, the user can press the operation button 521 with his hand, at this time, the control circuit board 51 receives the starting signal from the operation button 521, and can control the motor assembly 21 to start; it should be noted that the prerequisite for successfully starting the high-pressure cleaning machine 100 is that the trigger lever 411 needs to be in the pressed state all the time, and the operation button 521 does not need to be pressed continuously after being pressed once, but if the user releases the trigger lever 411 during use, the machine will stop. The two-step starting of the high-pressure cleaning machine 100 through the trigger system 4 and the control system 5 completely prevents the user from misoperating the machine, and ensures the operation safety of the user.

[0062] Turning to FIGS. 2 and 3, the user pulls the trigger lever 411, which also synchronously opens the water inlet valve 36 of the pump unit 3. Specifically, the pump unit 3 is connected with a waterway switch 37 at the right end of the water inlet valve 36, and the end of the waterway switch 37 away from the water inlet valve 36 abuts against the end of the trigger lever 411; when the trigger lever 411 rotates counterclockwise, the waterway switch 37 will correspondingly rotate clockwise, thereby driving the water inlet valve 36 to open to the left; further, the pump unit is provided with a first one-way valve 38 between the water inlet end 34 and the pressure chamber 311, and a second one-way valve 39 between the pressure chamber 311 and the water outlet end 35; after the user presses the operation button 521 to start the motor assembly 21, the plunger 32 will reciprocate accordingly; during the right movement of the plunger 32, the first one-way valve 38 is opened and the second one-way valve 39 is closed, and the external water flows into the pressure chamber 311 through the water inlet end 34, and the pressure increasing mechanism 33 is in an energy storage state due to compression; during the left movement of the plunger 32, the first one-way valve 38 is closed and the second one-way valve 39 is opened, and the pressure increasing mechanism 33 restores, and the stored energy acts on the plunger 32 to pressurize the external water in the pressure chamber 311, so that the external water is sprayed from the water outlet end 35.

[0063] In the present embodiment, the water inlet end 34 cannot be directly connected with a water pipe for conveying external water flow, and a water inlet assembly 6 needs to be installed to realize the connection. Referring to FIG. 2, FIG. 9 and FIG. 10, the lower end of the main body part 11 is provided with an input end 111, the water inlet end 34 is exposed from the input end 111, the water inlet end 34 is connected with a water inlet connector 61 outside, a flow guide device 62 is installed inside the water inlet connector and extends upward into the water inlet end 34, and the water inlet end 34, the water inlet connector 61 and the flow guide device 62 jointly constitute the water inlet assembly 6. Further, the water inlet assembly 6 forms a water flow inlet part 6a at the lower end of the water inlet connector 61, forms a water flow outlet part 6b at the upper side of the flow guide device 62, the water flow outlet part 6b is located inside the water inlet end 34, and the water inlet assembly 6 further forms a water inlet chamber 6c between the water flow inlet part 6a and the water flow outlet part 6b, the external water flow enters the water inlet chamber 6c from the water flow inlet part 6a, flows through the inside of the flow guide device 62, and finally flows out from the water flow outlet part 6b.

[0064] Referring to FIG. 9 and FIG. 10, the inside of the water inlet connector 61 forms a connector chamber 611, the connector chamber 611 is sequentially provided with a connector water inlet 611a, a first limiting part 612 and a second limiting part 613 from bottom to top; the upper end of the connector chamber 611 is provided with a threaded part 614, the threaded part 614 can detachably connect the water inlet connector 61 to the outside of the water inlet end 34; and, at the lower side of the threaded part 614, the water inlet connector 61 is provided with a sealing ring 64 to realize the sealing with the water inlet end 34; the outer wall of the water inlet connector 61 is further provided with an identification part 615, the identification part 615 can indicate the disassembly direction of the water inlet connector 61 to the user.

[0065] Turning to FIG. 11 and FIG. 12, the drainage device 62 comprises a disc-shaped support disc 621, the support disc 621 extending radially from the edge with four lugs 621a arranged at an angle of 90 degrees with respect to each other; the upper surface of the support disc 621 is integrally connected with a filter cartridge 622, the filter cartridge 622 comprises a cylindrical filter cartridge body 622a, the inside of the filter cartridge body 622a forms a filter cartridge chamber 622b, the outer wall surface of the filter cartridge body 622a is penetrated by a plurality of filter holes 622c, the filter holes 622c and the filter cartridge chamber 622b are in communication, at the same height, the filter holes 622c are combined in a uniform interval to form a circular ring, and the outer wall surface of the filter cartridge body 622a is uniformly distributed with a plurality of circular rings in the up-down direction; on the upper part of the lug 621a, the outer surface of the filter cartridge body 622a is provided with a radially extending lug 622d, the number of the lug 622d is four and the angle between them is 90 degrees, and each lug 622d can find the lug 621a aligned with it in the up-down direction; the upper end of the filter cartridge 622 is integrally connected with a drainage outlet 623, the drainage outlet 623 comprises a transition section 623a connected to the filter cartridge body 622a, a flat section 623b extending upward from the transition section 623a, and an outlet flange 623c extending from the outer periphery of the flat section 623b; the transition section 623a is a circular truncated cone with an increasing inner diameter from bottom to top, the smallest inner diameter is greater than or equal to the inner diameter of the filter cartridge chamber 622b, and the flat section 623b is a constant-diameter cylinder with a smallest inner diameter greater than or equal to the inner diameter of the transition section 623a.

[0066] Next, the specific installation process of the water inlet assembly 6 is described: first, the drainage device 62 needs to be fixed to the water inlet end 34, for this, the drainage outlet 623 can be inserted into the water inlet end 34 with the outlet flange 623c abutting against the inner wall of the water inlet end 34; then, the upper end of the water inlet connector 61 can be aligned with the lower end of the drainage device 62, and after alignment, it can be moved upward to gradually shield the drainage device 62; after installation is completed, the water inlet end 34, the water inlet connector 61 and the drainage device 62 have the following assembly relationship: the lug 621a and the first limiting portion 612 abut, and the lower side of the water inlet end 34 and the second limiting portion 613 abut.

[0067] Referring to FIG. 12 to FIG. 13, the lower surface of the support disc 621 is provided with a drainage feature 624, which has a base 624a installed at the center of the support disc 621 and drainage ribs 624b spirally extending from the base 624a towards the edge of the support disc 621, the number of drainage ribs 624b is three and they are evenly spaced around the base 623a; further, the drainage ribs 624b are defined by a first curved edge 624c and a second curved edge 624d, the combination of one end of the first curved edge 624c close to the base 624a and one end of the second curved edge 624d close to the base 624a forms a drainage proximal end 624e, the combination of one end of the first curved edge 624c away from the base 624a and one end of the second curved edge 624d away from the base 624a forms a drainage distal end 624f, the width of the drainage rib 624b becomes narrower and narrower from the drainage proximal end 624e to the drainage distal end 624f, until the end of the drainage distal end 624f converges into an end point, which is defined as the drainage end point 624g.

[0068] In this embodiment, the inside of the water inlet assembly 6 forms several spaces, which are described as follows, referring to FIG. 9: the water inlet chamber 6c is formed by the inner wall of the water inlet joint 61, the inner wall of the water inlet end 34 and the outlet flange 623c, that is, the joint chamber 611 is a component of the water inlet chamber 6c; the support disc 621, the outlet flange 623c and the water inlet chamber 6c form the dirt collection chamber 63 together, and the raised rib 622d divides the dirt collection chamber 63 into a first dirt collection chamber 631 located on the lower side of the raised rib 622d and a second dirt collection chamber 632 located on the upper side of the raised rib 622d.

[0069] Next, the water inlet process of the water inlet assembly 6 is described, please refer to FIG. 9 to FIG. 13: when the external water flow is first introduced into the water inlet chamber 6c from the water flow inlet part 6a under the action of the pump unit 3, then the water flow flows upwards through the drainage feature 624, since the drainage rib 624b is a radial spiral body, the external water flow will flow out along the support disc 621 in a spiral manner under the action of the drainage rib 624b and impact the filter cartridge 622 from the drainage end point 624g, so as to enter the filter cartridge through the filter hole 622c; in this process, the dirt particles carried in the water flow will be separated to the wall surface of the dirt collection chamber 63 due to the centrifugal force, so as to ensure the cleanliness of the water flow.

[0070] Further, even if the dirt particles are not completely separated when the water flow passes through the drainage feature 624, the filter hole 622c will intercept these dirt particles when the water flow enters the filter cartridge chamber 622b through the filter hole 622c, and the dirt particles on the filter hole 622c will be stripped when the next round of water flow impacts the filter hole 622c, so as to fall into the dirt collection chamber 63; further, the external water flow separated from the dirt particles will flow out from the drainage outlet 623 after entering the filter cartridge chamber 622b, and finally flow to the pump body 31 through the water flow outlet part 6b.

[0071] After the high-pressure cleaner 100 has been in operation for some time, a certain amount of dirt particles can accumulate on the inner wall of the dirt-collecting chamber 63. If the user wants to clean this dirt, he can pull the drainage device 62 downwards. In the process, the outlet flange 622e can scrape off dirt that has accumulated on the inner wall of the second dirt-collecting chamber 632, so that the dirt falls into the first dirt-collecting chamber 631 or directly out of the water inlet portion 6a. For the dirt on the inner wall of the first dirt-collecting chamber 631, the user can separately remove the water inlet connector 61 to clean it.

[0072] It is worth mentioning that the water discharged from the water outlet end 35 cannot be directly sprayed out of the high-pressure cleaner 100, but needs to rely on the spray rod system 8 to achieve spraying. Next, the spray rod system 8 will be described. Please refer to FIG. 2 and FIG. 18, the spray rod system 8 is installed on the output end 112 of the main body portion 11, which is composed of a spray pipe 81, a spray head 82 and a spray seat 83. The spray pipe 81 extends into the main body portion 11 from the output end 112 and is connected with the water outlet end 35. The right end of the spray seat 83 extends into the main body portion 11 and abuts against the main body portion 11 to achieve fixation. The spray head 82 is installed on the spray seat 83, and the spray pipe 81 passes through the inside of the spray seat 83 and the spray head 82.

[0073] Further, the spray seat 83 is formed with a spray seat cavity 831, which is divided into a large-diameter area 832 on the left side and a small-diameter area 833 on the right side. The inner diameter of the large-diameter area 832 is larger than that of the small-diameter area 833. The right end wall of the small-diameter area 833 extends leftward with a spray seat limiting portion 834. The right end of the spray head 82 is provided with a spray head boss 822, which is composed of an axially extending extension portion 822a and a radially extending abutting portion 822b. When the spray head 82 is installed in the spray seat 83, the extension portion 822a abuts against the small-diameter area 833, and the abutting portion 822b contacts the large-diameter area 832. The spray head boss 822 is also formed with a boss inner cavity 823, the right end of which abuts against the outer periphery of the spray seat limiting portion 834. The boss inner cavity 823 is provided with a boss groove 823a, in which a foolproof element 85 is installed. Specifically, the middle section of the foolproof element 85 is clamped in the boss groove 823a, and the outer walls of the left and right ends of the foolproof element 85 abut against the boss inner cavity 823. The outside of the spray head boss 822 is provided with a fixing device 84. By operating the fixing device 84, the quick installation and release of the spray head 82 relative to the spray seat 83 can be achieved. After the external water flows out of the water outlet end of the pump unit 3, it continues to flow into the spray pipe 81 and is finally sprayed out of the spray head passage 821 in the spray head 82.

[0074] When the user performs cleaning operation with the high-pressure cleaner 100, the high-pressure cleaner 100 will generate large vibration due to the high-speed rotation of the motor assembly 21, the reciprocating motion of the plunger 32 and the jet motion of the external water flow after being pressurized. Therefore, the damping system 9 is arranged to reduce the vibration transmitted to the user's hand during the operation of the machine.

[0075] Please refer to FIG. 2 to FIG. 4 and FIG. 18 to FIG. 20, the damping system 9 includes a first damping element 91 arranged between the pump body 31 and the main body 11 and a second damping element 92 arranged between the spray head 82 and the spray pipe 81; the first damping element 91 is a rubber piece, including a damping base 911, a damping side ring 912 vertically extending from the damping base 911, the damping base 911 is penetrated by a damping hole 914, and the damping side ring 912 is formed with a damping cavity 913; the first damping element 91 is positioned and installed in the following manner: the inner wall of the main body 11 is formed with a ring seat 113 facing the pump body 31, the ring seat 113 forms an installation cavity 114, the pump body 31 protrudes with a pump body protruding rib 312 facing the main body 11, the inner diameter of the installation cavity 114 is equal to the outer diameter of the damping side ring 912, the depth of the installation cavity 114 in the front-rear direction is equal to the height of the first damping element 91 as a whole in the front-rear direction, and the outer diameter of the pump body protruding rib 312 is equal to the inner diameter of the damping cavity 913; when the first damping element 91 is installed, the damping base 911 can be placed towards the installation cavity 114 first, then the damping side ring 912 and the inner wall of the installation cavity 114 are abutted to completely push the first damping element 91 into the installation cavity 114, and finally the pump body protruding rib 312 is inserted into the damping cavity 913, thereby realizing the positioning and installation of the first damping element 91; the second damping element 92 is an O-ring, which is installed in the boss inner cavity on the spray head 82, the left side abuts against the left wall of the boss inner cavity 823, the right side abuts against the anti-dummy element 85, and the inside is for the spray pipe 81 to pass through.

[0076] In this embodiment, the number of the first damping elements 91 is two, which are symmetric about the main body plane 115 of the main body 11 in front and back, and the main body plane 115 passes through the center of the second damping element 92; further, the distance between the center of the second damping element 92 and the center of the two first damping elements 91 is equal, and the center line of the three forms an isosceles triangle; in this way, the two first damping elements 91 can absorb the vibration at the motor assembly 21 and the plunger 32, the second damping element 92 can absorb the vibration at the spray rod system 8, and the damping system 9 composed of the three can effectively weaken the vibration transmitted to the user's hand by the machine, thereby improving the operation comfort of the user.

[0077] In addition to the vibration of the high-pressure cleaner 100 causing the user to have a bad experience, the waterproofing of the battery pack 71 can also cause the user to be troubled: when the high-pressure cleaner is working, the external water flow and the object being cleaned can collide at high speed, causing the water flow to splash dirt everywhere. In this case, the water flow will inevitably splash onto the connection between the battery pack 71 and the casing 1, affecting the use of the battery pack 71. In addition, if the user does not use the high-pressure cleaner 100, places it near water, or places it in a relatively humid environment, the water flow or moisture will inevitably cause damage to the battery pack 71.

[0078] To improve the waterproofing of the battery pack 71, the high-pressure cleaner 100 in the present embodiment is provided with a sheath 72 on the outside of the battery pack 71 and the footpads 13, so that the battery pack 71, the footpads 13, and the sheath 72 combine to form a protection system 7. Please refer to FIG. 1 and FIGS. 14-17: the sheath 72 includes a hollow sheath base 721, the upper end face of the sheath base 721 is defined as a sheath base positioning face 721a, and the inner wall face of the sheath base 721 is defined as a sheath base engaging face 721b; the right side of the sheath base positioning face 721a is integrally connected upward with a sheath baffle 722, the end face of the sheath baffle 722 that is set toward the upper left is defined as a sheath baffle positioning face 722a, and the inner wall face formed by the sheath baffle 722 is defined as a sheath baffle engaging face 722b; the right side of the sheath baffle 722 is integrally connected with a sheath button portion 723, the sheath button portion 723 extends from the upper part of the sheath baffle 722 to the lower part of the sheath base 721, the sheath button portion 723 is penetrated by a sheath button hole 723a, and the inner wall face formed by the sheath button portion 723 is defined as a sheath button engaging face 723b.

[0079] Next, the connection between the battery pack 71 and the sole 13 is described. The battery pack 71 has a cuboid-shaped battery pack base 711 and a base boss 712 extending upward from the battery pack base 711. On the right upper side of the battery pack base 711, a base baffle 714 is integrally connected, which extends rightward with a battery pack button part 715 extending downward from the base baffle 714 to the battery pack base 711. The battery pack button part 715 is provided with a battery pack button 716, through which the connection and release between the battery pack 71 and the sole 13 can be achieved. Specifically, the upper end of the battery pack base 711 is provided with a battery pack connecting part 713, and the sole 13 is provided at the bottom with a first sole flange 131 and a second sole flange 132 connected to the first sole flange 131, which define a sole opening in which a battery pack mounting part 133 is arranged. Correspondingly, the battery pack base 711 is provided with a battery pack connecting part 713, and when the battery pack connecting part 713 and the battery pack mounting part 133 are coupled together, the battery pack 71 is mounted to the sole 13. At this time, the battery pack base 711 and the base boss 712 abut against the first sole flange 131, and the base baffle 714 abuts against the second sole flange 132. If the user wants to remove the battery pack 71 from the sole 13, the battery pack button 716 can be pressed to remove the battery pack 71.

[0080] Further, the connection relationship between the sheath 72, the sole 13 and the battery pack 71 is described. Since the sheath 72 is made of flexible material, the user can directly install the sheath 72 to the outer periphery of the battery pack 71 and the sole 13. When the sheath 72 is installed, the sheath base 721 abuts against the first sole flange 131, and the sheath baffle 722 abuts against the first sole flange 131 and covers the second sole flange 132.

[0081] Specifically, the sheath base positioning surface 721a abuts against the lower end of the first instep flange 131, and the sheath base joint surface 721b abuts against the circumferential surface of the battery pack base 711; and the sheath baffle positioning surface 722a abuts against the lower end of the first instep flange 131, and the sheath baffle joint surface 722b abuts against the outer circumferential surface of the second instep flange 132; in addition, the sheath button joint surface 723b also abuts against the outer circumferential surface of the battery pack button portion 715, so that the battery pack button 716 is exposed from the sheath button hole 723a; it should be noted that the front and rear sides of the battery pack 71 are provided with a nameplate portion 717, and the right side of the battery pack 71 is provided with an electric quantity display portion 718; when the sheath 72 is fixed, the upper half of the nameplate portion 717 is shielded, but the electric quantity display portion 718 is not shielded, because the electric quantity display portion 718 is composed of an electric quantity button 718a and an electric quantity indicator 718b; when the user presses the electric quantity button 718a, the remaining endurance of the battery pack 71 can be known; if the sheath 72 shields the electric quantity display portion 718b, the user's operation experience of the high-pressure cleaning machine 100 will be reduced.

[0082] In this embodiment, the protection system 7 composed of the sheath 72, the battery pack 71 and the instep 13 can effectively prevent the splash of external water, and improve the service life of the battery pack 71; in addition, the sheath 72 has a wide range of applications, and is suitable for any direct-current electric tool; furthermore, the sheath 72 has a simple structure and is relatively easy to manufacture, so its cost is also relatively low.

[0083] The present application is not limited to the above specific embodiments. Those skilled in the art can easily understand that the water inlet assembly and the high-pressure cleaning machine of the present application have many alternative solutions without departing from the principles and scope of the present application. The protection scope of the present application is subject to the contents of the claims.

Claims

1. A water inlet assembly comprising a water inlet end, a water inlet connector connected to the water inlet end, and a flow guide device mounted in the water inlet connector, the water inlet assembly having a water inlet portion and a water outlet portion on either side and a water inlet chamber between the water inlet portion and the water outlet portion, through which an external water flow enters from the water inlet portion, passes through the flow guide device, and exits from the water outlet portion; characterized in that: The drainage device has a support disc near the water inlet, a filter cylinder extending from one side of the support disc, and a drainage feature provided on the other side of the support disc. External water flow entering from the water inlet is guided by the drainage feature and impacts the filter cylinder in a spiral flow manner. The external water flow passes through the filter cylinder, and dirt carried in the external water flow is separated and collected into the water inlet chamber.

2. The water inlet assembly of claim 1, wherein: The drainage feature has a base installed in the center of the support disc, and a drainage rib extending spirally from the base towards the edge of the support disc. The drainage rib is formed by a first curved edge and a second curved edge arranged opposite to the first curved edge.

3. The water inlet assembly of claim 2, wherein: An end of the first curved edge near the base and an end of the second curved edge near the base form a drainage proximal end, and an end of the first curved edge away from the base and an end of the second curved edge away from the base form a drainage distal end. The width of the drainage rib decreases from the drainage proximal end to the drainage distal end.

4. The water inlet assembly of claim 3, wherein: An end of the drainage distal end converges into an end point.

5. The water inlet assembly of claim 1, wherein: The drainage device has a drainage outlet connected to the filter cylinder. The drainage outlet includes a transition section connected to the filter cylinder, a straight section extending from the transition section, and an outlet flange protruding from the outer periphery of the straight section. The outlet flange abuts the inner wall of the water inlet end. The water inlet chamber is formed by the inner wall of the water inlet connector, the inner wall of the water inlet end, and the outlet flange.

6. The water inlet assembly of claim 5, wherein: The support disc has a radially extending lug. The outlet flange, the lug, and the water inlet chamber form a dirt collection chamber. The filter cylinder has a filter cylinder body and a protruding rib extending radially from the filter cylinder body. The protruding rib divides the dirt collection chamber into a first dirt collection chamber on the lower side and a second dirt collection chamber on the upper side.

7. The water inlet assembly of claim 6, wherein: The inner wall of the water inlet connector is provided with a first limiting portion and a second limiting portion arranged spaced apart from the first limiting portion. The lug abuts the first limiting portion, and the water inlet end abuts the second limiting portion.

8. The water inlet assembly of claim 7, wherein: The outer side of the water inlet connector is provided with an identification portion indicating the disassembly direction of the water inlet connector.

9. The water inlet assembly of claim 8, wherein: The water inlet portion is located on the lower side of the water inlet connector, and the water outlet portion is located on the upper side of the straight section.

10. A high-pressure washer comprising a housing, a motor assembly housed in the housing, a pump unit driven in operation by the motor assembly, and a water inlet assembly connected to the pump unit, the water inlet assembly comprising a water inlet connector and a flow guide device mounted in the water inlet connector, the water inlet assembly having a water inlet portion and a water outlet portion provided on both sides and a water inlet chamber located between the water inlet portion and the water outlet portion, an external water flow entering from the water inlet portion, flowing through the flow guide device, and being guided from the water outlet portion to the pump unit; characterized in that: The drainage device has a support disc near the water inlet, a filter cylinder extending from one side of the support disc, and a drainage feature provided on the other side of the support disc. External water flow entering from the water inlet is guided by the drainage feature and impacts the filter cylinder in a spiral flow manner. The external water flow passes through the filter cylinder, and dirt carried in the external water flow is separated and collected into the water inlet chamber.

11. The high pressure washer of claim 10, characterized in that: The water inlet assembly has a water inlet end connected to the pump unit. The water inlet end is located radially between the water inlet connector and the drainage device.

12. The high pressure washer of claim 11, characterized in that: The drainage feature has a base installed at the center of the support disc and a drainage rib spirally extending from the base towards the edge of the support disc, the drainage rib is formed by a first curved edge and a second curved edge arranged opposite to the first curved edge, the end of the first curved edge close to the base and the end of the second curved edge close to the base form a drainage proximal end, the end of the first curved edge away from the base and the end of the second curved edge away from the base form a drainage distal end, the width of the drainage rib decreases from the drainage proximal end to the drainage distal end, the end of the drainage distal end converges into an end point, and the number of the end point is three.

13. The high pressure washer of claim 12, characterized in that: The support disc has radially extending lugs, and the drainage rib is located radially inside the lugs.

14. The high pressure washer of claim 11, wherein: The filter cartridge includes a cylindrical filter cartridge body and a filter cartridge chamber arranged in the filter cartridge body, and the filter cartridge body is penetrated by a plurality of filter holes, and the filter holes are communicated with the filter cartridge chamber.

15. The high pressure washer of claim 14, characterized in that: The filter cartridge is provided with an outlet flange close to the water flow outlet portion, the water inlet chamber is formed by the inner wall of the water inlet connector, the inner wall of the water inlet end and the outlet flange, the support disc, the outlet flange and the water inlet chamber form a dirt collection chamber, and the length of the dirt collection chamber in the up-down direction is greater than the length of the filter cartridge chamber in the up-down direction.

16. A high-pressure washer comprising a housing, a motor assembly housed in the housing, a pump unit driven in operation by the motor assembly, and a water inlet assembly connected to the pump unit, the water inlet assembly comprising a water inlet connector and a flow guide mounted in the water inlet connector, the water inlet assembly having a water inlet portion and a water outlet portion provided on two sides and a water inlet chamber located between the water inlet portion and the water outlet portion; characterized in that: The drainage device has a support disc close to the water flow inlet portion, a filter cartridge extending from one side end surface of the support disc, and a drainage feature arranged on the other side end surface of the support disc, the filter cartridge is provided with an outlet flange close to the water flow outlet portion, the support disc and the outlet flange form a dirt collection chamber, external water flow entering from the water flow inlet portion is guided by the drainage feature and impacts the filter cartridge, external water flow passes through the filter cartridge, and dirt carried in the external water flow is separated and collected into the dirt collection chamber.

17. The high pressure washer of claim 16, characterized in that: The drainage feature has a base installed at the center of the support disc and a drainage rib spirally extending from the base towards the edge of the support disc, the drainage rib is formed by a first curved edge and a second curved edge arranged opposite to the first curved edge, the end of the first curved edge close to the base and the end of the second curved edge close to the base form a drainage proximal end, the end of the first curved edge away from the base and the end of the second curved edge away from the base form a drainage distal end, the width of the drainage rib decreases from the drainage proximal end to the drainage distal end, the end of the drainage distal end converges into an end point, and the number of the end point is three.

18. The high pressure washer of claim 17, characterized in that: The support disc and the outlet flange are provided with radially extending convex ribs, and the convex ribs divide the dirt collection chamber into a first dirt collection chamber located on the lower side and a second dirt collection chamber located on the upper side.

19. The high pressure washer of claim 18, characterized in that: The water inlet assembly has a water inlet end connected to the pump unit, the outlet flange abuts the inner part of the water inlet end, and the water inlet end is located on the upper side of the convex rib.

20. The high pressure washer of claim 19, characterized in that: The support disc has a plurality of lugs radially protruding from the edge, the number of the convex ribs is a plurality, the convex ribs are located on the upper side of the lugs, and each lug has a corresponding convex rib in the up-down direction.

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