High pressure cleaning equipment

Abstract

The present invention provides a high-pressure cleaning device, comprising a motor assembly, a transmission assembly driven by the motor assembly, a pump assembly connected to the transmission assembly, a machine base and a pipeline assembly, wherein the machine base comprises a motor housing for accommodating the motor assembly and a transmission box for accommodating the transmission assembly, and mutually independent heat dissipation parts are arranged on both sides of the motor housing. Compared with the prior art, the present invention satisfies the requirements of the handheld high-pressure cleaning device for the heat dissipation part structure by arranging mutually independent heat dissipation parts on both sides of the motor housing, and the high-pressure cleaning device is small in size, high in efficiency, good in cooling, and easy to carry.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and in particular to a high-pressure cleaning equipment. Background Art

[0002] At present, there are two main ways of heat dissipation for high-pressure cleaning equipment on the market. One is to use a fan to cool the motor, and the other is to use a water cooling channel to cool the motor.

[0003] The fan cooling method is to set a ventilation slot structure on the whole machine product, which has low heat dissipation efficiency and poor cooling effect. In addition, during use, the ventilation slot is easy to get water in and the high-pressure cleaning equipment has a low waterproof level, which can easily affect the operation and use safety of the electrical components inside the whole machine.

[0004] Therefore, existing high-pressure cleaning equipment mainly adopts a water-cooling channel cooling method. The water-cooling channel cooling method is to set an annular plunger cavity structure on the surface of the motor housing, which has high heat dissipation efficiency and good cooling effect. However, the annular plunger cavity structure is relatively complex and large in size, and is generally used in non-handheld high-pressure cleaning equipment, and cannot meet the requirements of handheld high-pressure cleaning equipment for the plunger cavity structure.

[0005] In view of this, it is necessary to provide a high-pressure cleaning device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a high-pressure cleaning device which has small size, high efficiency, good cooling and is easy to carry.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A high-pressure cleaning device comprises a motor assembly, a transmission assembly driven by the motor assembly, a pump assembly connected to the transmission assembly, a machine base and a pipeline assembly. The machine base comprises a motor shell accommodating the motor assembly and a transmission box accommodating the transmission assembly. Independent heat dissipation parts are provided on both sides of the motor shell.

[0009] As a further improved technical solution of the present invention, the motor housing includes a first main body and two side covers and a front cover assembled to the first main body, the transmission box includes a second main body and an upper cover, and the first main body and the second main body are integrally arranged.

[0010] As a further improved technical solution of the present invention, grooves are respectively provided on both side surfaces of the first main body, openings at the front and rear ends and a receiving space for accommodating the motor assembly are provided in the first main body, the two side cover plates are respectively assembled to the two grooves to form the heat dissipation part, and the front cover plate is assembled to the front end opening of the first main body away from the transmission assembly.

[0011] As a further improved technical solution of the present invention, a plurality of guide ribs are arranged in the groove, and the plurality of guide ribs form a rotary heat dissipation water channel in the heat dissipation part, and the two ends of the heat dissipation water channel are located at two diagonal points on each side of the main body.

[0012] As a further improved technical solution of the present invention, the second main body is provided with a receiving space for receiving the transmission assembly and three openings connected to the receiving space, two of which are respectively located at the front and rear ends of the second main body, and the other opening is located at the top of the second main body. The opening at the front end of the second main body is connected to the opening at the rear end of the first main body, and the upper cover is used to close the opening at the top of the second main body.

[0013] As a further improved technical solution of the present invention, the transmission assembly includes an integrated transmission shaft perpendicular to the motor shaft of the motor assembly, an eccentric block sleeved on the transmission shaft and connected to the pump assembly, a pinion sleeved on the motor shaft, a large gear sleeved on the transmission shaft and connected to the pinion gear, and a double bearing located below the large gear and sleeved on the lower end of the transmission shaft. The transmission shaft is cantilevered on the transmission box.

[0014] As a further improved technical solution of the present invention, the pipeline assembly includes a water inlet pipeline and a connecting pipeline, the motor housing and the pump assembly are provided with a water inlet and a water outlet, the water inlet pipeline is connected to the water inlet of the motor housing, and the connecting pipeline is connected to the water outlet of the motor housing and the water inlet of the pump assembly.

[0015] As a further improved technical solution of the present invention, the pump assembly includes a plunger connected to the transmission assembly and a plunger cavity for accommodating the plunger, the plunger includes a connecting portion connected to the transmission assembly, a main body and a head, the head divides the plunger cavity into a first chamber and a second chamber, the plunger is provided with an opening extending from the head to the main body and a plastic plug blocking the opening, and the main body is provided with a first annular groove near the head.

[0016] As a further improved technical solution of the present invention, it further includes a switch assembly, which includes a trigger, a water inlet switch for controlling the opening and closing of the pipeline assembly, and an electric switch for controlling the opening and closing of the motor assembly, and the trigger controls the water inlet switch and the electric switch in a linkage manner.

[0017] As a further improved technical solution of the present invention, the motor assembly is a brushless DC motor, the motor housing is a rectangular parallelepiped, and the transmission box is cylindrical.

[0018] The beneficial effects of the present invention are as follows: by arranging mutually independent heat dissipation parts on both sides of the motor housing, the requirements of the handheld high-pressure cleaning equipment for the heat dissipation part structure are met, and the high-pressure cleaning equipment has a small size, high efficiency, good cooling, and is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the high-pressure cleaning device of the present invention.

[0020] Figure 2 It is a three-dimensional exploded view of the base of the present invention.

[0021] Figure 3 It is a three-dimensional diagram of the first main body and the second main body of the present invention.

[0022] Figure 4 It is a three-dimensional diagram of the transmission assembly of the present invention.

[0023] Figure 5 It is a cross-sectional view of the high-pressure cleaning equipment of the present invention.

[0024] Figure 6 for Figure 5 Enlarged view of part A in the middle.

[0025] Figure 7 It is a three-dimensional exploded view of the plunger of the present invention.

[0026] Figure 8 for Figure 5 A partial enlarged view of the water inlet switch.

[0027] Fig. 9 It is a three-dimensional exploded view of the water inlet pipe of the present invention.

[0028] Fig.10 It is a stereogram of the trigger of the present invention.

[0029] Fig.11 It is a three-dimensional diagram of the valve seat of the present invention.

[0030] Fig.12 It is a three-dimensional diagram of the valve core of the present invention.

[0031] Fig.13 It is a three-dimensional diagram of the driving push rod of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Please combine Figures 1 to 5 As shown, the high-pressure cleaning equipment of the present invention includes a motor assembly 1, a transmission assembly 2 driven by the motor assembly 1, a pump assembly 3 connected to the transmission assembly 2, a machine base 4, a pipeline assembly 5 and a switch assembly 6.

[0034] Please refer to Figure 5As shown, the motor assembly 1 includes a motor shaft 11 and a motor stator and rotor assembly 12, and the motor assembly 1 is a brushless DC motor. On the one hand, the brushless DC motor optimizes the water cooling method of the motor stator and rotor assembly 12 while reducing the motor size; on the other hand, the brushless DC motor reduces the resistance in the pipeline assembly 5 while enhancing the cooling effect, thereby improving the suction force and performance parameters of the pump assembly 3 in the self-priming state.

[0035] Combination Figure 2 and Figure 3 As shown, the base 4 includes a motor housing 41 for accommodating the motor assembly 1 and a transmission box 42 for accommodating the transmission assembly 2. The motor housing 41 is a rectangular parallelepiped, including a first main body 411 and two side covers 412 and a front cover 413 assembled to the first main body 411.

[0036] The first main body 411 is provided with an opening 414 at its front end, an opening (unnumbered) at its rear end, and a receiving space 415 for receiving the motor assembly 1. The first main body 411 is assembled with the front cover 413 at the front end opening 414 away from the transmission assembly 2, and is assembled with the transmission box 42 at the rear end opening close to the transmission assembly 2.

[0037] Grooves 416 are respectively provided on the two sides of the first main body 411, and the two side cover plates 412 are respectively assembled on the two grooves 416, thereby forming a heat dissipation portion 417. Compared with the general annular water tank, the heat dissipation portions 417 on both sides of the first main body 411 have a simple structure and a small size, which is more conducive to the use of the handheld high-pressure cleaning equipment; on the other hand, the heat dissipation portions 417 on both sides are independent of each other, which is convenient for enhancing the cooling effect of a single heat dissipation portion 417. In addition, the water-cooling channel cooling method adopted by the heat dissipation portion 417 can enable the high-pressure cleaning equipment to meet the IPX5 waterproof level requirements compared with the general fan cooling method, thereby further increasing the working pressure of the high-pressure cleaning equipment to 4MPa.

[0038] In order to further enhance the cooling effect of the heat dissipation portion 417, a plurality of guide ribs 418 are provided in the groove 416. The plurality of guide ribs 418 form a rotating heat dissipation water channel in the heat dissipation portion 417 (see Figure 3 The two ends of the heat dissipation channel are respectively located at two diagonal positions on each side of the main body 411 , so that the water flows from top to bottom through the heat dissipation portion 417 under the guidance of the guide ribs 418 , thereby evenly cooling both sides of the motor assembly 1 .

[0039] The transmission box 42 is cylindrical and includes a second main body 421 and an upper cover 422. The second main body 421 is provided with a receiving space 423 for receiving the transmission assembly 2 and three openings connected to the receiving space 423. Two of the openings are located at the front and rear ends of the second main body 421, respectively. Specifically, the opening (not numbered) at the front end of the second main body 421 is connected to the opening at the rear end of the first main body 411, and the opening 424 at the rear end of the second main body 421 is connected to the pump assembly 3. Another opening 425 is located at the top of the second main body 421, and the upper cover 422 is used to close the opening 425.

[0040] The first main body 411 and the second main body 421 are integrally arranged, thereby reducing noise and vibration problems caused by processing and matching errors between the motor assembly 1 and the transmission box 42, while also improving the transmission accuracy and transmission efficiency of the high-pressure cleaning equipment and reducing useless power consumption of the entire machine.

[0041] Please combine Figure 1 and Figure 3 As shown, the pipeline assembly 5 includes a water inlet pipeline 51 and a connecting pipeline 52, and the motor housing 41 and the pump assembly 3 are both provided with a water inlet and a water outlet. The water inlet 419 and the water outlet 410 on the motor housing 41 are respectively located at the two ends of the heat dissipation water channel, and the water inlet pipeline 51 is divided into two pipelines respectively connected to the water inlet 419 of the heat dissipation water channel on both sides of the motor housing 41. One end of the connecting pipeline 52 is connected to the water outlet 410 of the heat dissipation water channel on both sides of the motor housing 41, and the other end is connected to the water inlet 35 of the pump assembly 3.

[0042] Please combine Figure 8 and Fig. 9 As shown, the water inlet pipeline 51 includes a connecting pipe 53, a water inlet pipe 54 and a water inlet seat 55 which are connected in sequence. The water inlet pipe 54 includes a tube body 541, a mounting pipe 542 which is perpendicular to the tube body 541 and connected to the tube body 541, and a water inlet end 543 and a water outlet end 544 located at both ends of the tube body 541. The water inlet seat 55 is connected to the water inlet end 543, and the connecting pipe 53 is connected to the water outlet end 544.

[0043] Please combine Figure 4 and Figure 5As shown, the transmission assembly 2 includes an integrated transmission shaft 21 perpendicular to the motor shaft 11 of the motor assembly 1, an eccentric block 22 sleeved on the transmission shaft 21 and connected to the pump assembly 3, a pinion 23 sleeved on the motor shaft 11, a large gear 24 sleeved on the transmission shaft 21 and connected to the small gear 23, and a double bearing 25 located below the large gear 24 and sleeved on the transmission shaft 21. The high-pressure cleaning equipment mainly uses the double bearings 25 to support the cantilever transmission shaft 21 transmission, avoiding the problem of machine vibration and noise caused by the matching clearance when the transmission shaft 21 needs to be split into two sections when designing the supports at both ends of the transmission shaft 21, and also reduces the processing accuracy and cost of parts.

[0044] Please combine Figure 5 and Figure 6 As shown, the pump assembly 3 is a single plunger dual-chamber structure, which includes a pump housing 30, a plunger 31 located inside the pump housing 30 and connected to the transmission assembly 2, a plunger chamber 32 for accommodating the plunger 31, four one-way valves 33 and a water outlet 34. The transmission assembly 2 drives the plunger 31 to reciprocate to pressurize the liquid in the plunger chamber 32, and the pressurized liquid flows out through the water outlet 34.

[0045] Please refer to Figure 7 As shown, the plunger 31 includes a connecting portion 311 connected to the transmission assembly 2, a main body 312 and a head 313. The head 313 of the plunger 31 divides the plunger cavity 32 into a first cavity 321 and a second cavity 322, wherein the second cavity 322 is close to the transmission assembly 2; the first cavity 321 and the second cavity 322 are not connected to each other.

[0046] The plunger 31 is provided with an opening 314 extending from the head 313 to the main body 312, which is mainly used to reduce the mass of the plunger 31, thereby reducing the vibration caused by the impact of the plunger 31 on the pump assembly 3 during the reciprocating motion. The head 313 of the plunger 31 is also provided with a plastic plug 315 that blocks the opening 314, which can not only reduce the mass of the plunger 31, but also reduce the clearance volume of the plunger cavity 32 after compression, thereby improving the working efficiency of the high-pressure cleaning equipment. The main body 312 of the plunger 31 is provided with a first annular groove 316 near the head 313, which is mainly used to increase the water intake and drainage of the second chamber 322, thereby increasing the water flow of the high-pressure cleaning equipment. The head 313 of the plunger 31 is provided with a second annular groove 317, and the second annular groove 317 is provided with a water seal 318.

[0047] The four one-way valves 33 include a first water inlet valve 331, a second water inlet valve 332, and a first water outlet valve 333 and a second water outlet valve 334 corresponding to the first water inlet valve 331 and the second water inlet valve 332. The first water inlet valve 331 and the second water inlet valve 332 are located below the plunger 31 and are perpendicular to the plunger 31. The first water outlet valve 333 and the second water outlet valve 334 are parallel to the plunger 31, wherein the first water outlet valve 333 is flush with the plunger 31, and the second water outlet valve 334 is higher than the plunger 31. At the same time, the first water inlet valve 331 and the second water inlet valve 332 are connected to the connecting pipeline 52 of the pipeline assembly 5, and the first water outlet valve 333 and the second water outlet valve 334 are connected to the water outlet 34.

[0048] A safety valve 341 is installed on the water outlet body 34. When the pump assembly 3 is in operation and the water outlet nozzle (not shown) on the water outlet body 34 is blocked, the water pressure in the water outlet body 34 will immediately increase, and the water pressure will immediately react on the first water outlet valve 333 and the second water outlet valve 334 to close them, and at the same time act on the safety valve 341 below the water outlet body 34. The valve core 342 of the safety valve 341 will be immediately opened under the action of the return water pressure, and the high-pressure return water will be unloaded into the pipeline assembly 5. After the water pressure is released, the valve core 342 of the safety valve will immediately return to the closed state. This arrangement can avoid damage to the water gun (not shown) connected to the pump assembly 3 when the nozzle is blocked.

[0049] The working principle of the pump assembly 3 is specifically as follows:

[0050] Please refer to Figure 6 As shown, when the plunger 31 moves to the left, the water in the first chamber 321 on the left is compressed to form high pressure, the first water inlet valve 331 is closed and the first water outlet valve 333 is opened, so that the high-pressure water enters the water outlet body 34 through the first water outlet valve 333; at the same time, the second chamber 322 on the right forms a vacuum state, the second water inlet valve 332 is opened and the second water outlet valve 334 is closed, so that the external water source enters the second chamber 322 through the second water inlet valve 332.

[0051] When the plunger 31 moves to the right, the water in the second chamber 322 on the right is compressed to form high pressure, the second water inlet valve 332 is closed and the second water outlet valve 334 is opened, so that the high-pressure water enters the water outlet body 34 through the second water outlet valve 334; at the same time, the first chamber 321 on the left forms a vacuum state, the first water inlet valve 331 is opened and the first water outlet valve 333 is closed, so that the external water source enters the first chamber 321 through the first water inlet valve 331.

[0052] Please refer to Figure 8 As shown, the switch assembly 6 includes a trigger 61, a water inlet switch 62 and an electric switch 63. The trigger 61 controls the water inlet switch 62 and the electric switch 63 in linkage, thereby realizing the water-electric linkage control function of the handheld high-pressure cleaning equipment, which is convenient to use and provides a good user experience.

[0053] Please refer to Fig.10 As shown, the trigger 61 includes a bottom wall 611, two side walls 612 located on both sides of the bottom wall 611, and a middle wall 613 located between the two side walls 612. The bottom wall 611 and the two side walls 612 form a receiving groove 614. After assembly, the mounting pipe 542 is received in the receiving groove 614, so that the water inlet pipe 54 is clamped and connected with the trigger 61.

[0054] Combination Figure 8 and Fig.11 As shown, the water inlet switch 62 includes a water inlet valve 64 and a driving push rod 65, which is mainly used to control the opening and closing of the pipeline assembly 5. The water inlet valve 64 is installed in the water inlet pipe 54, and includes a valve seat 641 and a valve core 642 matched with the valve seat 641. The valve seat 641 is located at the water outlet end 544, and includes a first main body 643 and a first through hole 644 opened in the first main body 643.

[0055] Please combine Figure 8 and Fig.12 As shown, the valve core 642 includes a pin 645, a second main body 646, and a second through hole 647 provided in the second main body 646. The pin 645 of the valve core 642 is tightly matched with the first through hole 644 of the valve seat 641. When the water inlet switch 62 is closed, the pin 645 of the valve core 642 is tightly plugged in the first through hole 644, thereby preventing water from flowing through the water inlet pipe 54; when the water inlet switch 62 is opened, the pin 645 of the valve core 642 is separated from the first through hole 644, thereby allowing water to flow through the water inlet pipe 54 into the connecting pipe 53. In addition, a spring 66 is provided between the second main body 646 and the water inlet seat 55, and a chamfered surface 648 protruding upward is provided on the bottom surface of the second through hole 647 away from the valve seat 641.

[0056] Please combine Figure 8 and Fig.13 As shown, the driving push rod 65 is an integrated structure and is accommodated in the mounting tube 542, one end of which cooperates with the trigger 61, and the other end cooperates with the water inlet valve 64 to control the opening and closing of the water inlet valve 64. The driving push rod 65 includes a head 651 that abuts against the bottom wall 611 of the trigger 61 and a rod 652 that abuts against the chamfered surface 648 of the valve core 642. In addition, a sealing ring 653 is provided on the rod 652 to prevent water from leaking out through the mounting tube 542; a spring 67 is provided on the rod 652.

[0057] Please refer to Figure 8As shown, the electric switch 63 includes a trigger 631 and a contact 632 disposed on the trigger 631, which is mainly used to control the opening and closing of the motor assembly 1. The trigger 631 is electrically connected to the motor assembly 1, and the contact 632 is disposed adjacent to the middle wall 613. The trigger 61 presses the contact 632, so that the trigger 631 starts the motor assembly 1. The structure of the electric switch 63 in the present invention is prior art and will not be described in detail here.

[0058] The working principle of the switch assembly 6 is specifically as follows:

[0059] When the trigger 61 is pressed to start the high-pressure cleaning device, on the one hand, the middle wall 613 of the trigger 61 presses the contact 632 to start the electric switch 63; on the other hand, the bottom wall 611 of the trigger 61 presses the head 651 of the driving push rod 65, and at the same time pushes the rod 652 of the driving push rod 65 to move toward the chamfered surface 648, so that the ejector pin 645 of the valve core 642 slowly separates from the first through hole 644 of the valve seat 641, and the water flows into the connecting pipe 53 through the water inlet pipe 54. When the trigger 61 is released to turn off the high-pressure cleaning device, on the one hand, the contact 632 returns to its original position and cuts off the power supply, turning off the electric switch 63; on the other hand, the driving push rod 65 returns to its original position under the action of the spring 67, and the valve core 642 is also re-inserted into the first through hole 644 under the action of the spring 66.

[0060] The working mode of high pressure cleaning equipment is as follows:

[0061] First, the motor shaft 11 drives the small gear 23 in the transmission box 41 to rotate, the small gear 23 drives the large gear 24 to rotate, and the large gear 24 drives the transmission shaft 21 to rotate; secondly, the transmission shaft 21 drives the eccentric block 22 to rotate, and the eccentric block 22 drives the plunger 31 to reciprocate, thereby converting the rotation of the motor shaft 11 into the linear motion of the plunger 31; then, the reciprocating motion of the plunger 31 drives the four one-way valves 33 arranged inside the pump assembly 3, thereby performing water absorption and water pressure work; finally, the high-pressure output of the water flow of the high-pressure cleaning equipment is realized.

[0062] In summary, the present invention provides a high-pressure cleaning device, including a motor assembly 1, a transmission assembly 2 driven by the motor assembly 1, a pump assembly 3 connected to the transmission assembly 2, a machine base 4, and a pipe assembly 5. The high-pressure cleaning device provides independent heat dissipation parts 417 on both sides of the motor housing 41, thereby meeting the requirements of the handheld high-pressure cleaning device for the structure of the heat dissipation part 417, and the high-pressure cleaning device is small in size, high in efficiency, good in cooling, and easy to carry.

[0063] The terms used herein, such as "upper", "lower", "left", "right", "front", "back", etc., which indicate relative spatial positions, are used for the purpose of convenience to describe the relationship between one feature and another feature as shown in the accompanying drawings. It is understood that, depending on the placement of the product, the terms of relative spatial positions may be intended to include different orientations other than those shown in the drawings, and should not be construed as limitations on the claims. In addition, the descriptor "horizontal" used herein is not completely equivalent to being perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0064] In addition, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A high pressure cleaning device, characterized in that: It includes a motor assembly, a transmission assembly driven by the motor assembly, a pump assembly connected to the transmission assembly, a machine base and a pipeline assembly. The machine base includes a motor shell for accommodating the motor assembly and a transmission box for accommodating the transmission assembly. Both sides of the motor shell are provided with independent heat dissipation parts. The motor shell includes a first main body. The two side surfaces of the first main body are respectively provided with grooves. A plurality of guide ribs are provided in the grooves. The plurality of guide ribs form a rotary heat dissipation water channel in the heat dissipation part. The two ends of the heat dissipation water channel are located at two diagonal points on each side surface of the first main body. The motor assembly is a brushless DC motor.

2. The high pressure cleaning device according to claim 1, characterized in that: The motor housing further comprises two side covers and a front cover assembled to the first main body, the transmission box comprises a second main body and an upper cover, and the first main body and the second main body are integrally arranged.

3. The high pressure cleaning device according to claim 2, characterized in that: The first main body is provided with openings at the front and rear ends and a receiving space for receiving the motor assembly. The two side covers are respectively assembled to the two grooves to form the heat dissipation part. The front cover is assembled to the front end opening of the first main body away from the transmission assembly.

4. The high pressure cleaning device according to claim 2, characterized in that: The second main body is provided with a receiving space for receiving the transmission assembly and three openings connected to the receiving space, two of which are respectively located at the front and rear ends of the second main body, and the other opening is located at the top of the second main body. The opening at the front end of the second main body is connected to the opening at the rear end of the first main body, and the upper cover is used to close the opening at the top of the second main body.

5. The high pressure cleaning device according to claim 1, characterized in that: The transmission assembly includes an integrated transmission shaft perpendicular to the motor shaft of the motor assembly, an eccentric block sleeved on the transmission shaft and connected to the pump assembly, a small gear sleeved on the motor shaft, a large gear sleeved on the transmission shaft and connected to the small gear gear, and a double bearing sleeved on the lower end of the transmission shaft below the large gear. The transmission shaft is cantilevered on the transmission box.

6. The high pressure cleaning device according to claim 1, characterized in that: The pipeline assembly includes a water inlet pipeline and a connecting pipeline. The motor housing and the pump assembly are both provided with a water inlet and a water outlet. The water inlet pipeline is connected to the water inlet of the motor housing, and the connecting pipeline is connected to the water outlet of the motor housing and the water inlet of the pump assembly.

7. The high pressure cleaning device according to claim 1, characterized in that: The pump assembly includes a plunger connected to the transmission assembly and a plunger cavity for accommodating the plunger. The plunger includes a connecting portion connected to the transmission assembly, a main body and a head. The head divides the plunger cavity into a first chamber and a second chamber. The plunger is provided with an opening extending from the head to the main body and a plastic plug blocking the opening. The main body is provided with a first annular groove near the head.

8. The high pressure cleaning device according to claim 1, characterized in that: It further includes a switch assembly, which includes a trigger, a water inlet switch for controlling the opening and closing of the pipeline assembly, and an electric switch for controlling the opening and closing of the motor assembly. The trigger controls the water inlet switch and the electric switch in a linkage manner.

9. The high pressure cleaning device according to claim 1, characterized in that: The motor housing is in the shape of a cuboid, and the transmission box is in the shape of a cylinder.

Images