WO2020220506A1

WO2020220506A1 - Handheld high-pressure washer with silent water-cooled high-efficiency electric motor

Info

Publication number: WO2020220506A1
Application number: PCT/CN2019/099766
Authority: WO
Inventors: 林有余; 刘楷; 蔡济波; 吴玉华; 汪洋
Original assignee: 江苏苏美达五金工具有限公司
Priority date: 2019-04-29
Filing date: 2019-08-08
Publication date: 2020-11-05
Also published as: CN110138131B; CN110138131A

Abstract

Disclosed is a handheld high-pressure washer with a silent water-cooled high-efficiency electric motor. The handheld high-pressure washer comprises: an electric motor pump unit, wherein the electric motor pump unit comprises a mini-pump and a water-cooled electric motor, the water-cooled electric motor is connected to the mini-pump, and the mini-pump is provided with a pump water inlet and a high-pressure water outlet; and a housing, wherein the housing is hermetically wrapped around the electric motor pump unit; the water-cooled electric motor comprises an electric motor housing; an electric motor shaft, a rotor and a stator core are mounted in the electric motor housing; the rotor is mounted on the electric motor shaft, and the stator core is located outside the rotor; the electric motor housing is provided with a circular side wall, and the stator core is attached to the side wall to form a heat conduction channel; and the electric motor housing is provided with at least one cooling channel passing through the side wall, a water inlet in communication with one end of the cooling channel, and a water outlet in communication with the other end of the cooling channel, the water inlet is connected to an external water source, and the water outlet is in communication with the pump water inlet. The present invention has the following beneficial effects: the electric motor uses water cooling to replace the existing air cooling; the waterproofing grades of the electric motor and the whole machine can reach IPX7 or even higher; and the machine is relatively safe and reliable.

Description

Hand-held high-pressure cleaner with silent water-cooled high-efficiency motor

Technical field

The invention belongs to the technical field of hand-held cleaning machines, and in particular relates to a hand-held high-pressure cleaning machine with a silent water-cooled high-efficiency motor.

Background technique

The high-pressure cleaner is a kind of equipment that uses water or a mixture of cleaning agents as the cleaning medium and uses high-pressure water to clean the surface of objects. The high-pressure cleaner can be used to clean cars, courtyards, floors, railings, doors and windows, etc. It is more Efficient and convenient, its main components are spray gun and host. The host includes motor, pump and battery or external power cord. The spray gun and host are connected by a water inlet pipe. The spray gun is responsible for forming water flows of different shapes according to actual needs, and the host is responsible for removing water from Municipal tap water or buckets are converted into high-pressure water flow and delivered to the spray gun. Commonly, the host is placed on the ground fixedly or movably. The host has a large volume and heavier weight. The use process is carried out by the spray gun, and the scope of use is limited. There are still many inconveniences in operation.

Patent US20090045271A1 discloses a hand-held electric pressure washer, including a pump 16, a motor 14, a casing 20, and a handle 62 and a side handle 68 connected to the casing 20. The nozzle 58 is connected to the casing 20 through a gun barrel 54. This patent What is actually disclosed is a low-pressure washer whose pressure cannot meet the requirements of a high-pressure washer, because the international standard clearly defines a high-pressure washer as a working pressure greater than or equal to 2.5MPa. In actual use, the working pressure can only exceed 2.5MPa. To achieve the purpose of high-pressure cleaning, because the high-pressure cleaning machine is in direct contact with water, the waterproof level of the corresponding handheld high-pressure cleaning machine in the standard requires at least IPX7, and the machine is required to work for a short time under water. It can be seen from the technical solution disclosed in the patent US20090045271A1 that the rear of the motor 14 is provided with a cooling fan 18, and the corresponding position of the casing 20 is provided with a number of vents 22. The existence of the vents 22 makes the waterproof level of the handheld electric pressure washer reach Less than the requirements of a handheld high-pressure cleaner. What the market really needs is a handheld high-pressure cleaner. The contradiction between motor cooling and waterproofing is an industry problem that has not been solved.

Patent CN205570600U also discloses a hand-held washing machine, which aims to improve the portability of the washing machine and solve the problem of mobility. The difference between this technical solution and the patent US20090045271A1 is that the patent US20090045271A1 is connected to an external power source through the power cord 30, and the external power source supplies power to the motor 14, while the CN205570600U machine includes a battery 170, which is powered by the battery, and replaces the external power source with the battery. The patent CN205570600U also discloses only a low-pressure washer, not a handheld high-pressure washer. Its working pressure cannot reach or exceed the 2.5MPa pressure required by the high-pressure washer. CN205570600U does not disclose any motor cooling and waterproof sealing solutions. The provided is not a hand-held high-pressure washer. From the CN205570600U manual, it can be seen that there are cooling vents at the rear of the motor. The corresponding position on the casing must be left with vents, and its waterproof level cannot meet the requirements of the handheld high-pressure washer.

As a hand-held cleaning machine, the high-speed operation of the motor pump will bring about a sharp rise in temperature, which is not only transmitted to the user through the shell, which seriously affects the comfort of use, but also affects the operating efficiency and life of the machine. In addition, the noise generated by the open casing and motor blades also directly affects the user's operating comfort.

It can be seen that it is particularly necessary to design a portable high-pressure washer that is convenient to move, can be directly connected to an external water source through the water inlet pipe, pressure can meet the requirements of the high-pressure washer, and the waterproof level meets the requirements of the hand-held high-pressure washer, high cleaning ability, low temperature, and quietness. .

Summary of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a hand-held high-pressure cleaner with a silent water-cooled high-efficiency motor, which has the characteristics of good cooling effect, low operating noise, high cleaning pressure and strong waterproof ability.

In order to solve the existing technical problems, the present invention discloses a hand-held high-pressure cleaner with a silent water-cooled high-efficiency motor, including:

Motor pump unit. The motor pump unit includes a mini pump and a water-cooled motor. The water-cooled motor is connected to the mini pump. The mini pump has a pump inlet and a high-pressure water outlet; and

Shell, the shell contains the motor pump unit;

The water-cooled motor includes a motor shell; a rotor and a stator core are sealed in the motor shell;

The rotor is installed on the motor shaft, and the stator core is located outside the rotor; the motor shell has a ring of side walls, and the inner surface of the side wall is close to the stator core to form a heat conduction channel; the motor shell is provided with at least one cooling channel passing through the side wall, The water inlet at one end of the cooling channel is connected to the water outlet at the other end of the cooling channel, the water inlet is connected to an external water source, and the water outlet is connected to the water inlet of the pump.

Further, when there are more than two cooling channels, the motor housing is further provided with a branch channel communicating with the water inlet end of the cooling channel and a confluence channel communicating with the water outlet end of the cooling channel.

Further, the cooling passage extends in a direction parallel to the axis of the motor casing, the shunt passage extends in a diameter direction parallel to the motor casing, and the confluence passage extends in the circumferential direction of the motor casing.

Further, the motor housing includes an end cover and a housing, the housing is a tank-shaped body with one end open and the other end closed, the end cover is sealed and installed at the opening of the housing, the end cover is close to the mini pump, and the housing is far away from the mini pump; The water inlet, cooling channel, branch channel and confluence channel are all arranged on the shell, and the water outlet is arranged on the end cover.

Further, the opening of the housing has an annular groove extending along the circumferential direction thereof, and the end cover and the annular groove are sealed and connected to form a confluence channel.

Further, the bearing II is installed in the center hole of the end cover, the bearing I is installed in the center hole of the housing, and the two ends of the motor shaft are installed in the bearing I and the bearing II respectively.

Further, the shell is a structure formed by integral processing.

Further, the outer surface of the cooling channel is provided with a plurality of heat conducting ribs extending to the outer surface of the motor housing.

Furthermore, a speed reduction mechanism is provided between the mini pump and the water-cooled motor.

Further, the reduction mechanism is a planetary gear reduction.

Further, the mini pump is a single plunger pump or a swash plate three plunger pump.

Further, the water-cooled motor is a rare earth permanent magnet brushless motor.

Further, the housing has an integrally connected receiving part and a holding part, the mini pump and the water-cooling motor are arranged in the receiving part, the holding part extends obliquely in a direction away from the receiving part, and the holding part is provided with a power switch.

Further, the hand-held high-pressure cleaner also includes a battery pack, the rated voltage of the battery pack is 18-60V; the battery pack is arranged in the handheld part or detachably arranged in the waterproof compartment at the end of the handheld part, and the waterproof compartment is provided with a waterproof compartment cover .

Further, the hand-held high-pressure cleaner further includes a battery pack, the rated voltage of the battery pack is 18-60V; the battery pack is connected to the end of the handheld part in a sealed plug-in connection.

Further, the motor housing is provided with a lead-out hole through which a wire of the power supply machine is drawn, and the motor lead is sealed at the lead-out hole.

Further, the outer diameter of the stator core does not exceed 90 mm.

Further, the outer diameter of the stator core is 38 to 58 mm.

Furthermore, the water-cooled motor or hand-held high-pressure cleaner has a waterproof rating of at least IPX7.

Furthermore, the weight of the hand-held high-pressure cleaner does not exceed 4.2 kg.

Furthermore, the minimum working pressure of the mini pump is not less than 2.5Mpa.

Further, the housing seals the motor pump unit.

The beneficial effects of the present invention:

1. In the present invention, the motor adopts water cooling instead of the existing air cooling, so the waterproof level of the motor and the whole machine can reach IPX7 or even higher through the sealing design, the machine is safer and more reliable, and meets the waterproof requirements of the handheld high-pressure washer.

2. In the present invention, the motor uses non-circulating water for cooling, the cooling effect is greatly improved, the motor temperature is significantly reduced, the motor heating problem is effectively solved, the motor efficiency is improved, and the output pressure and flow rate are improved under the same power consumption, and the water outlet pressure can be improved. Reach or even exceed 2.5MPa, significantly improve the cleaning ability, and on the basis of more convenience, the application range has also been broadened.

3. In the present invention, for permanent magnet motors or rare earth permanent magnet brushless motors, after adopting a water cooling scheme, the temperature of the permanent magnet materials of the motor is well controlled, which effectively solves the problem of high temperature demagnetization of permanent magnets or rare earth permanent magnet materials, and effectively prevents Irreversible demagnetization causes the motor to fail, and the reliability of the motor is greatly improved.

4. In the present invention, after the motor is water-cooled, the fan noise is avoided. Because the motor shell is closed and there is no air inlet or outlet on the shell, the machine becomes quieter and more compact, which effectively prevents noise from affecting people. s damage.

Description of the drawings

Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention;

2 is a perspective view of the structure of the motor pump unit in the embodiment shown in FIG. 1;

Figure 3 is a front view of the structure of the motor pump unit in the embodiment shown in Figure 1;

Figure 4 is a cross-sectional view along the section line AA in Figure 3;

Figure 5 is a cross-sectional view along section line BB in Figure 3;

Figure 6 is a perspective sectional view of the water-cooled motor in the embodiment shown in Figure 1;

Figure 7 is a partial enlarged view of C in Figure 6;

Figure 8 is a three-dimensional exploded view of the water-cooled motor in the embodiment shown in Figure 1;

Fig. 9 is a perspective view of the structure of the motor housing in the embodiment shown in Fig. 1.

Reference signs:

1 shell; 2 end cover; 3 receiving part; 4 battery pack; 5 mini pump; 6 high pressure water outlet; 7 pump water inlet; 8 water outlet; 9 water inlet; 10 connecting pipe; 11 water inlet connector; 12 motor wire ; 13 lead-out hole; 14 bearing I; 15 shunt channel; 16 motor shaft; 17 side wall; 18 stator core; 19 cooling channel; 20 first O-ring; 21 water inlet joint O-ring; 22 second O-ring Ring; 23 reduction mechanism; 24 pump housing; 25 swash plate; 26 plunger; 27 water outlet connector; 28 bearing II; 29 motor pump unit; 30 heat conduction rib; 31 confluence channel; 32 water-cooled motor; 33 water outlet connector O-ring ; 34 rotor; 35 annular groove; 36 connector; 37 water inlet pipe; 38 spray gun; 39 hand-held high-pressure cleaner; 40 hand-held part; 41 power switch; 42 waterproof compartment; 43 battery pack shell; 44 waterproof compartment cover; 45 Motor shell; 46 inner wall of end cover; 47 outer wall of end cover; 48 inner wall of shell; 49 outer wall of shell; the direction indicated by the arrow in the figure is the direction of water flow.

Detailed ways

The present invention will be further described below in conjunction with the drawings. The following embodiments are only used to explain the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

As shown in Figures 1 to 9, a handheld high-pressure washer 39 with a silent water-cooled high-efficiency motor includes: a motor pump unit 29 and a housing 43. The housing 43 contains the motor pump unit 29, and the housing 43 seals the motor pump unit. 29.

The motor pump unit 29 includes a mini pump 5 and a water-cooled motor 32. The water-cooled motor 32 is connected to the mini pump 5 to drive the mini pump 5 to work. On the one hand, the connection here means that the water-cooled motor 32 and the mini pump 5 need to be connected in structure. The fixing in the housing 43, on the other hand, means that the water-cooled motor 32 and the mini pump 5 need to be connected in power to realize torque transmission. The mini pump 5 has a pump water inlet 7 and a high-pressure water outlet 6. The high-pressure water outlet 6 is connected to the spray gun 38 to spray the high-pressure water stream in a certain form to achieve high-pressure cleaning.

The water-cooled motor 32 includes a motor shell 45; a rotor 34 and a stator iron core 18 are sealed in the motor shell 45; both ends of the motor shaft 16 are rotatably installed in the motor shell 45 through a bearing I14 and a bearing II28, respectively. 34 is installed on the motor shaft 16 to transmit torque. The stator core 18 is located outside the rotor 34. The rotor 34 rotates when torque is generated by the electromagnetic principle. The motor housing 45 has a ring of side walls 17 that surrounds the outer circumference of the stator core 18 and makes the stator core 18 abut the side walls 17 to form a heat conduction path. The heat generated by the stator core 18 is therefore transferred to On the side wall 17 to facilitate subsequent heat dissipation. In order to achieve the purpose of water cooling and heat dissipation, the motor housing 45 is provided with at least one cooling channel 19 passing through the side wall 17, especially the outer surface of the side wall 17, a water inlet 9 communicating with one end of the cooling channel 19, and an outlet communicating with the other end of the cooling channel 19 The water inlet 8 and the water inlet 9 are sealed with a water inlet connector 11 through the water inlet connector O-ring 21. The water inlet connector 11 can be connected to the connector 36 of the water inlet pipe 37, and the other end of the water inlet pipe 37 is connected to an external water source. A water outlet connector 27 is installed at the water outlet 8 through a water outlet connector O-ring 33, and the water outlet connector 27 is communicated with the pump water inlet 7 through a connecting pipe 10. The cleaning water from the external water source, when not pressurized, first acts as cooling water in the cooling channel 19 to absorb the heat transferred from the stator core 18 to the side wall 17, and then enters the mini pump 5 for pressurization to form a high-pressure water flow for cleaning . Due to the water-cooling method, the whole shell 43 does not need an air-cooled opening, and the whole machine can be completely sealed to reach a higher waterproof level IPX7, which meets the standards of hand-held high-pressure washers, and the pressure can reach 2.5MPa or more of high-pressure washers. Since the water-cooled motor 32 does not require cooling fan blades and the motor housing 45 is a sealed structure, the motor running noise is very low, and the purpose of silence is achieved. In addition, since the cooling capacity of the water-cooling method is improved, the power of the water-cooled motor 32 can also be improved, so that the outlet pressure of the mini pump 5 reaches the high pressure standard, that is, not less than 2.5 MPa, which greatly improves the cleaning ability.

In order to further improve the cooling capacity, the number of cooling channels 19 can be set to more than two. At this time, in order to facilitate water in and out, the motor housing 45 is also provided with a branch channel 15 communicating with the water inlet end of the cooling channel 19 and a confluence channel communicating with the water outlet end of the cooling channel 19 31. The cooling water enters the branch passage 15 through the water inlet 9, and then diverges into each cooling passage 19 to cool the motor housing 45, and then collects through the confluence passage 31 and is discharged from the water outlet 8 to the mini pump 5.

In order to ensure the cooling effect and facilitate processing and manufacturing, the motor housing 45 includes an end cover 2 and a housing 1. The housing 1 is a pot-shaped body that is open at one end and closed at the other end and is integrally formed. The end cover 2 is sealed and installed in the housing. At the opening of 1, the end cover 2 is connected with the mini pump 5 so as to realize the connection and fixation of the water-cooled motor 29 and the mini pump 5. The end cover 2 is close to the mini pump 5 and the housing 1 is far away from the mini pump 5; the water inlet 9, the cooling channel 17, the branch channel 15 and the confluence channel 31 are all arranged on the housing 1, and the water outlet 8 is arranged on the end cover 2. As a typical structural manner, the cooling passage 19 extends in a direction parallel to the axis of the casing 1, the shunt passage 15 extends in a diameter direction parallel to the casing 1, and the confluence passage 31 extends in the circumferential direction of the casing 1.

Since the motor housing 45 adopts an axially split structure, the confluence channel 31 can be arranged in this way. As shown in FIGS. 6 and 7, the opening of the housing 1 has an annular groove 35 extending in the circumferential direction thereof. A ring of shell inner wall 48 is formed on the inside and a ring of shell outer wall 49 is formed on the outside. Similarly, the end cover 2 also has a ring of end cover inner wall 46 and a ring of end cover outer wall 47. The end cover inner wall 46 is connected to the The shell inner wall 48 forms a sealed connection, the end cover outer wall 47 forms a sealed connection with the shell outer wall 49 through the second O-ring, and the annular groove 35 forms a confluence channel 31 for cooling water to flow through the sealed connection.

In order to realize the installation of the motor shaft 16, a bearing II28 is installed in the center hole of the end cover 2, a bearing I14 is installed in the center hole of the housing 1, and both ends of the motor shaft 16 are installed in the bearing I14 and the bearing II28, respectively.

Since there are parts on the motor housing 45 where the cooling channel 19 is not provided, in order to realize the heat dissipation of these parts, the outer surface of the cooling channel 19 is provided with a number of heat conducting ribs 30 extending to the outer surface of the motor housing 45, and the heat conducting ribs 30 can extend To the shell 1, it can also be extended to the end cover 2 to further improve the cooling capacity.

In order to improve the pressurizing capacity of the mini pump 5, a deceleration mechanism 23 is provided between the mini pump 5 and the water-cooled motor 32. The speed reduction mechanism 23 is arranged in the cavity on the front side of the end cover 2, and the speed reduction mechanism 23 is a planetary gear reduction. The mini pump 5 is a single plunger pump or a swash plate three plunger pump. The water-cooled motor 32 is a rare earth permanent magnet brushless motor.

As shown in Figure 1, the housing 43 has an integrated receiving part 3 and a holding part 40. The mini pump 5 and the water-cooled motor 32 are arranged in the holding part 3. The holding part 40 extends obliquely in a direction away from the holding part 3. The holding part 40 A power switch 41 is provided on it. The power switch 41 is connected in the power supply circuit to realize the start-stop control of the whole machine.

In order to increase the application range of the washing machine and reduce external cables, the washing machine can be self-powered. Specifically, the handheld high-pressure washing machine 39 also includes a battery pack 4, the rated voltage of the battery pack 4 is 18-60V; the battery pack 4 is set In the hand-held part 40 or detachably provided in the waterproof compartment 42 at the end of the hand-held part 40, the waterproof compartment 42 is provided with a waterproof compartment cover 44. The waterproof compartment cover 44 can adopt a sliding manner to realize the opening and closing of the waterproof compartment 42, and can also adopt a pivotal connection to realize the opening and closing of the waterproof compartment 42 to facilitate the taking and placing of the battery pack 4. As an alternative, the battery pack 4 is connected to the end of the handle 40 in a sealed plug-in connection. Specifically, the handle 40 is provided with contacts, and the corresponding part of the battery pack 4 is also provided with contacts. After the battery pack 4 is inserted in place, the two The contacts of the user are connected to form a complete power supply circuit, while meeting the waterproof requirements.

The motor housing 45 is provided with a lead-out hole 13 through which the power supply wire 12 is drawn, and the motor lead 12 is sealed at the lead-out hole 13, so as to ensure that the inside of the motor is sealed and ensure electrical safety.

In order to improve the gripping experience, the size of the receiving portion 3 of the housing 43 should not be too large, so the outer diameter of the stator core 18 does not exceed 90 mm, and further, the outer diameter of the stator core 18 is 38-58 mm. Similarly, in order to reduce the fatigue of hand-held use, the weight of the hand-held high-pressure cleaner 39 does not exceed 4.2 kg.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principles of the present invention, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims

A handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor, including:

A motor pump unit (29), the motor pump unit (29) includes a mini pump (5) and a water-cooled motor (32), the water-cooled motor (32) is connected to the mini pump (5), the mini pump (5) It has a pump water inlet (7) and a high-pressure water outlet (6); and

A housing (43), the housing (43) contains the motor pump unit (29);

It is characterized in that the water-cooled motor (32) includes:

A motor shell (45); a rotor (34) and a stator core (18) are sealed in the motor shell (45);

The rotor (34) is installed on the motor shaft (16), the stator core (18) is located outside the rotor (34); the motor housing (45) has a ring of side walls (17), so The inner surface of the side wall (17) is close to the stator core (18) to form a heat conduction channel; the motor housing (45) is provided with at least one cooling channel (19) passing through the side wall (17) and communicating The water inlet (9) at one end of the cooling channel (19) and the water outlet (8) connected to the other end of the cooling channel (19), the water inlet (9) is connected to an external water source, and the water outlet (8) Connected with the pump water inlet (7).
The handheld high-pressure cleaner (39) with a silent, water-cooled, high-efficiency motor according to claim 1, wherein when there are more than two cooling channels (19), the motor housing (45) is also provided There is a branch channel (15) connected to the water inlet end of the cooling channel (19) and a confluence channel (31) connected to the water outlet end of the cooling channel (19).
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 2, wherein the cooling channel (19) extends in a direction parallel to the axis of the motor housing (45), The shunt passage (15) extends in a direction parallel to the diameter of the motor casing (45), and the confluence passage (31) extends in the circumferential direction of the motor casing (45).
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 2, characterized in that: the motor housing (45) includes an end cover (2) and a housing (1), the The casing (1) is a tank-shaped body with one end open and the other end closed. The end cover (2) is sealed and installed at the opening of the casing (1), and the end cover (2) is close to the mini pump (5), the housing (1) is far away from the mini pump (5); the water inlet (9), cooling channel (17), shunt channel (15) and confluence channel (31) are all located in the On the housing (1), the water outlet (8) is provided on the end cover (2).
According to claim 4, a handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor, characterized in that: the opening of the housing (1) has an annular groove (35) extending along its circumference. ), the end cap (2) and the annular groove (35) are sealed and connected to form the confluence channel (31).
The handheld high-pressure cleaner (39) with a silent, water-cooled and high-efficiency motor according to claim 4, characterized in that: a bearing II (28) is installed in the center hole of the end cover (2), and the housing ( A bearing I (14) is installed in the center hole of 1), and both ends of the motor shaft (16) are installed in the bearing I (14) and the bearing II (28) respectively.
The handheld high-pressure cleaner (39) with a silent, water-cooled and high-efficiency motor according to claim 4, characterized in that the housing (1) is an integrally formed structure.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to any one of claims 1 to 7, characterized in that: the outer surface of the cooling channel (19) is provided with a plurality of housings facing the motor (45) The thermal conductive ribs (30) extend from the outer surface.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, characterized in that: a reduction mechanism (23) is provided between the mini pump (5) and the water-cooled motor (32). ).
The hand-held high-pressure cleaner (39) with a silent, water-cooled and high-efficiency motor according to claim 9, characterized in that: the reduction mechanism (23) is a planetary gear reduction.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, wherein the mini pump (5) is a single plunger pump or a swash plate three plunger pump.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1 or 11, characterized in that the water-cooled motor (32) is a rare earth permanent magnet brushless motor.
A handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, characterized in that: the housing (43) has an integrally connected receiving part (3) and a hand-held part (40), so The mini pump (5) and the water-cooled motor (32) are arranged in the receiving part (3), the hand-holding part (40) extends obliquely in a direction away from the receiving part (3), and the hand-holding part (40) is provided with a power switch (41).
The handheld high-pressure washer (39) with a silent water-cooled high-efficiency motor according to claim 13, characterized in that: the handheld high-pressure washer (39) further comprises a battery pack (4), and the battery pack (4) ) Has a rated voltage of 18-60V; the battery pack (4) is arranged in the hand-held part (40) or detachably arranged in the waterproof compartment (42) at the end of the hand-held part (40), so The waterproof bin (42) is provided with a waterproof bin cover (44).
The handheld high-pressure washer (39) with a silent water-cooled high-efficiency motor according to claim 13, characterized in that: the handheld high-pressure washer (39) further comprises a battery pack (4), and the battery pack (4) The rated voltage of) is 18-60V; the battery pack (4) and the end of the handle (40) are connected in a sealed plug-in connection.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, characterized in that: the motor housing (45) is provided with a lead-out hole (13) from which a power supply wire (12) is drawn. ), the motor wire (12) is sealed at the lead-out hole (13).
The handheld high-pressure cleaner (39) with a silent, water-cooled and high-efficiency motor according to claim 1, wherein the outer diameter of the stator core (18) does not exceed 90 mm.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, wherein the outer diameter of the stator core (18) is 38-58 mm.
The hand-held high-pressure washer (39) with a silent water-cooled high-efficiency motor according to claim 1, wherein the water-cooled motor (32) or the hand-held high-pressure washer (39) has a waterproof level of at least IPX7.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, characterized in that the weight of the handheld high-pressure cleaner (39) does not exceed 4.2 kg.
The handheld high-pressure cleaner (39) with a silent, water-cooled and high-efficiency motor according to claim 1, wherein the minimum working pressure of the mini pump (5) is not less than 2.5Mpa.
The handheld high-pressure cleaner (39) with a silent water-cooled high-efficiency motor according to claim 1, wherein the casing (43) hermetically wraps the motor pump unit (29).