WO2020220504A1 - 一种手持式高压清洗机用电机泵单元及手持式高压清洗机 - Google Patents

一种手持式高压清洗机用电机泵单元及手持式高压清洗机 Download PDF

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Publication number
WO2020220504A1
WO2020220504A1 PCT/CN2019/099763 CN2019099763W WO2020220504A1 WO 2020220504 A1 WO2020220504 A1 WO 2020220504A1 CN 2019099763 W CN2019099763 W CN 2019099763W WO 2020220504 A1 WO2020220504 A1 WO 2020220504A1
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WO
WIPO (PCT)
Prior art keywords
motor
pump
housing
pump unit
cooling channel
Prior art date
Application number
PCT/CN2019/099763
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English (en)
French (fr)
Inventor
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
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Application filed by 江苏苏美达五金工具有限公司 filed Critical 江苏苏美达五金工具有限公司
Publication of WO2020220504A1 publication Critical patent/WO2020220504A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing

Definitions

  • the invention belongs to the technical field of hand-held cleaning machines, and in particular relates to a motor pump unit for a hand-held high-pressure cleaning machine and a hand-held high-pressure cleaning machine.
  • 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 pipe.
  • the spray gun is responsible for forming water streams of different shapes according to actual needs, and the host is responsible for removing water from the 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 of the spray gun is used to work, and the scope of use is limited. There are still many inconveniences.
  • 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.
  • the waterproof level of the corresponding handheld high-pressure cleaning machine in the standard is not lower than IPX7, and the machine is required to work under water for a short time.
  • 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 The temperature rise and noise cannot be effectively controlled without the requirements of hand-held high-pressure cleaners. 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 handheld washing machine, which aims to improve the portability of the washing machine and solve the problem of mobility.
  • This technical solution differs from the patent US20090045271A1 in that 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 is a cooling air vent at the end of the motor. The corresponding position on the casing must be left with a vent. Its waterproof level cannot meet the waterproof level requirements of a handheld high-pressure washer. And there are defects and shortcomings such as high noise and not waterproof.
  • the high-speed operation of the motor and the pump will bring about a sharp increase in temperature, which is not only transmitted to the user through the shell, but the high temperature and hot hands seriously affect the comfort of use, but also affect the efficiency and life of the machine.
  • the noise generated by the operation of the open casing and the motor and the rotation of the fan directly affects the user's operating comfort.
  • the purpose of the present invention is to overcome the deficiencies in the prior art and provide a hand-held high-pressure cleaner, which has the characteristics of good cooling effect, low operating noise, high cleaning pressure and strong waterproof ability.
  • a motor pump unit for a handheld high-pressure cleaner which includes: a micro motor with an outer diameter of no more than 90 mm.
  • the micro motor includes a motor housing, a motor shaft, a rotor, and a stator core ,
  • the rotor is installed on the motor shaft, the stator core is located outside the rotor, and the rotor and stator core are set in the motor housing;
  • Mini pump includes pump housing, pump inlet and high pressure outlet;
  • the motor casing has a sealed cavity I and an inner casing.
  • the inner surface of the inner casing is close to the stator core to form a heat conduction channel;
  • the motor casing is provided with at least one cooling channel I passing through the inner casing and a connecting cooling channel I at one end.
  • the water inlet I and a water outlet I connected to the other end of the cooling channel I;
  • the water inlet I is connected to an external water source, and the water outlet I is connected to the water inlet of the pump;
  • the pump housing is provided with at least one cooling channel II, a water inlet II communicating with one end of the cooling channel II, and a water outlet II communicating with the other end of the cooling channel II; the water inlet II is connected to an external water source or outlet I, and the water outlet II is connected to the pump water intake.
  • the motor housing is further provided with a branch channel communicating with the water inlet end of the cooling channel I and a confluence channel communicating with the water outlet end of the cooling channel I.
  • cooling channel I extends in a direction parallel to the axis of the motor housing
  • the shunt channel extends in a diameter direction parallel to the motor housing
  • the confluence channel extends in the circumferential direction of the motor housing.
  • the motor casing includes an end cover and a casing that are axially sealed and connected, the casing 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 casing, and the end cover is connected to the mini pump;
  • the water inlet I, the cooling channel, the branch channel and the confluence channel are all arranged on the casing, and the water outlet I is arranged on the end cover.
  • the opening of the casing is provided with 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.
  • bearing II is installed in the center hole of the end cover, bearing I is installed in the center hole of the casing, and both ends of the motor shaft are installed in bearing I and bearing II respectively; the shunt passage passes near the outside of the casing at the installation position of bearing I .
  • the casing is an integrally formed structure.
  • the outer surface of the cooling channel I is provided with a plurality of heat conducting ribs I extending to the outer surface of the motor housing.
  • the motor housing is provided with a lead-out hole through which the wire of the power supply machine is drawn, and the motor lead is sealed at the lead-out hole.
  • the micro motor is a rare earth permanent magnet brushless motor
  • the waterproof grade of the micro motor is not less than IPX7
  • the minimum working pressure of the mini pump is not less than 2.5Mpa.
  • the water inlet II is located at the proximal position from the micromotor, and the water outlet II is located at the far end from the micromotor;
  • the outer surface of the cooling channel II is provided with a number of heat conducting ribs II extending to the outer surface of the pump casing; when the cooling channel II extends in the circumferential direction of the pump casing, the cooling The outer surface of the channel II is provided with a number of heat conducting ribs III extending to the outer surface of the pump casing.
  • the pump casing includes a pump head and a pump casing that are connected back and forth to form a sealed cavity II.
  • the cooling channel II, the water outlet II and the water inlet II are all provided on the pump casing.
  • an end cover is provided at one end of the pump housing close to the micro motor, and the end cover is connected with the micro motor.
  • the mini pump is a plunger pump, which also includes at least one plunger and a swash plate.
  • the plunger and the swash plate are both arranged in the sealed cavity II of the pump housing.
  • the swash plate is driven by the micro motor to drive the plunger. Move in a straight line.
  • mini pump and the mini motor are coaxially connected or connected at a certain angle.
  • the pump housing of the mini pump and the motor housing of the micro motor are connected by a snap connection.
  • a reduction mechanism is also provided between the mini pump and the micro motor, and the reduction mechanism is a planetary gear reduction mechanism and is arranged in an end cover connected between the mini pump and the micro motor.
  • the invention also discloses a hand-held high-pressure cleaner, which includes: a housing and a spray gun;
  • the housing has an integrated receiving part and a holding part
  • the motor pump unit is arranged in the receiving part
  • the holding part extends obliquely in a direction away from the receiving part
  • the holding part is provided with a power switch.
  • 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 , The waterproof bin cover is sealed with the waterproof bin through the sealing strip.
  • 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.
  • the weight of the hand-held high-pressure cleaner does not exceed 4.2 kg, and its waterproof rating is not lower than IPX7.
  • the micro 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 sealed design (that is, there is no air outlet on the shell), thereby making the machine safer It is reliable and meets the waterproof requirements of hand-held high-pressure cleaners.
  • the pump body is water-cooled while the motor is water-cooled to further reduce the temperature of the pump, so that the overall temperature rise is reduced, and the life of the whole machine is simultaneously improved.
  • 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.
  • 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.
  • 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.
  • Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention.
  • FIG. 2 is a perspective view of the structure of the motor pump unit in the embodiment shown in FIG. 1;
  • FIG 3 is a front view of the structure of the motor pump unit in the embodiment shown in Figure 1 (the motor is separated from the mini pump);
  • FIG 4 is a front view of the structure of the motor pump unit in the embodiment shown in Figure 1 (the motor is connected to the mini pump);
  • Figure 5 is a right side view of the structure of the motor pump unit in the embodiment shown in Figure 1;
  • Fig. 6 is a structural sectional view of the motor pump unit in the embodiment shown in Fig. 1;
  • FIG. 7 is a cross-sectional view along the section line AA in FIG. 6;
  • Figure 8 is a cross-sectional view along section line BB in Figure 6;
  • Figure 9 is a perspective view of the structure of the pump housing in the embodiment shown in Figure 1;
  • Figure 10 is a perspective sectional view of the motor in the embodiment shown in Figure 1;
  • Fig. 11 is a partial enlarged view at C in Fig. 10.
  • a hand-held high-pressure cleaner 35 includes a spray gun 38, a motor pump unit 20 and a casing 36, and the casing 36 seals and wraps the motor pump unit 20.
  • the motor pump unit 20 includes a mini pump 21 and a mini motor 22 with an outer diameter of no more than 90 mm.
  • the mini motor 22 is connected to the mini pump 21 to drive the mini pump 21 to work.
  • the connection here refers to the micro motor 22 and the mini pump 21
  • the structure needs to be connected to realize the fixation in the housing 36, on the other hand, it means that the micro motor 22 and the mini pump 21 need to be connected in power to realize the torque transmission.
  • the mini pump 21 has a pump water inlet 13 and a high-pressure water outlet 14.
  • the high-pressure water outlet 14 is connected to the spray gun 38 so as to spray the high-pressure water stream in a certain form to realize the adjustment of the cleaning range.
  • the micro motor 22 includes a motor housing 29; the motor housing 29 is installed with a motor shaft 9, a rotor 8 and a stator core 7; both ends of the motor shaft 9 are respectively mounted on the motor housing through a bearing I11 and a bearing II12.
  • the rotor 8 is installed on the motor shaft 9 to transmit torque
  • the stator core 7 is located outside the rotor 8 and generates torque through the electromagnetic principle to rotate the rotor 8.
  • the motor housing 29 has a sealed cavity I30 and an inner housing 52.
  • the inner housing 52 surrounds the outer circumference of the stator iron core 7 and makes the stator iron core 7 abut the inner housing 52 to form a heat conduction channel. The heat generated by the stator iron core 7 Therefore, it is conducted to the inner shell 52 to facilitate subsequent heat dissipation.
  • the motor housing 29 is provided with at least one cooling channel I17 passing through the inner housing 52, especially its outer surface, a water inlet I19 communicating with one end of the cooling channel I17, and a cooling channel I17 communicating with the other end of the cooling channel I17.
  • a water inlet joint 46 is installed at the water outlet I23 and the water inlet I19 through a water inlet joint sealing ring 45, and the water inlet joint 46 can be connected with the water inlet pipe connector 47 of the water inlet pipe 48 through the water inlet joint 46.
  • the other end of the water inlet pipe 48 is connected to an external water source, and a water outlet connector 27 is installed at the water outlet I23 through a water outlet connector sealing ring 57.
  • the water outlet connector 27 can be directly connected to the pump water inlet 13 through the connecting pipe 10.
  • the cleaning water from the external water source when not pressurized, first acts as cooling water in the cooling channel I17 to absorb the heat transferred from the stator core 7 to the inner shell 52, and then enters the mini pump 21 for pressurization to form a high-pressure water flow for cleaning. .
  • the housing 36 Due to the water-cooling method, the housing 36 has no air-cooled openings as a whole, and can be completely sealed to reach a higher waterproof level IPX7, which meets the standards of hand-held high-pressure washers.
  • the power of the micro motor 22 can also be improved, so that the water outlet pressure of the mini pump 21 reaches the high pressure standard, that is, not less than 2.5 MPa, which greatly improves the cleaning ability.
  • the number of cooling channels I17 can be set to more than two.
  • the motor housing 29 is also provided with a shunt channel 15 communicating with the water inlet of the cooling channel I17 and a confluence communicating with the water outlet of the cooling channel I17. Channel 18.
  • the cooling water enters the shunt passage 15 through the water inlet I19, and then is shunted to each cooling passage I17 to cool the motor housing 29, and then is collected through the confluence passage 18 and discharged from the water outlet I23 to the mini pump 21.
  • the motor housing 29 includes an end cover 5 and a housing 6 which are axially sealed and connected to form a sealed cavity I30.
  • the housing 6 is an integrally formed tank with one end open and the other closed.
  • the end cover 5 is sealed and installed at the opening of the casing 6, and the end cover 5 is connected with the mini pump 21 to realize the connection and fixation of the motor 29 and the mini pump 21.
  • the end cover 5 is close to the mini pump 21, and the casing 6 is far away from the mini pump 21; the water inlet I19, the cooling channel 17, the branch channel 15 and the confluence channel 18 are all provided on the casing 6, and the water outlet I23 is provided on the end cover 5.
  • the cooling passage I17 extends in a direction parallel to the axis of the casing 6, the shunt passage 15 extends in a diameter direction parallel to the casing 6, and the confluence passage 18 extends in the circumferential direction of the casing 6.
  • the confluence channel 18 can be arranged in this way.
  • the opening of the housing 6 has an annular groove 59 extending in the circumferential direction.
  • the inner side of 59 is the inner shell 52, and the outer side forms a ring of outer shell wall 56.
  • the end cover 5 also has a ring of end cover inner wall 53 and a ring of end cover outer wall 54.
  • the end cover inner wall 53 is connected to the inner wall through the first sealing ring 49
  • the shell 52 forms a sealed connection
  • the end cover outer wall 54 forms a sealed connection with the shell outer wall 56 through the second sealing ring 50
  • the annular groove 59 forms a confluence channel 18 for cooling water to flow through the sealed connection.
  • a bearing II12 is installed in the center hole of the end cover 5
  • a bearing I11 is installed in the center hole of the housing 6, and both ends of the motor shaft 9 are installed in the bearing I11 and the bearing II12, respectively.
  • the outer surface of the cooling channel I17 is provided with a number of heat conducting ribs I31 extending to the outer surface of the motor housing 29. It can be extended to the housing 6 or to the end cover 5 to further improve the cooling capacity.
  • a deceleration mechanism 4 is provided between the mini pump 21 and the micro motor 22.
  • the end cover 5 has a cylindrical structure and therefore has a receiving cavity, and the speed reduction mechanism 4 is arranged in the receiving cavity of the end cover 5.
  • the reduction mechanism 4 is a planetary gear reduction mechanism.
  • the micro motor 22 is a rare earth permanent magnet brushless motor.
  • the mini pump 21 also adopts a water cooling method for heat dissipation.
  • the mini pump 21 is a plunger pump, which includes at least one plunger 1, a swash plate 33 and a pump housing 58, and preferably has three plungers 1.
  • the pump housing 58 has a sealed cavity II2.
  • the sealed cavity II2 contains the plunger 1, the swash plate 33 and the lubricating coolant.
  • the plunger 1 reciprocates in the plunger cavity, and its end in the sealed cavity II2 is connected to the swash plate 33.
  • the disk surface is in sliding contact, and the swash plate 33 is driven by the micro motor 22 to drive the plunger 1 to move in a straight line.
  • the pump housing 58 is provided with at least one cooling channel II24, a water inlet II25 connected to one end of the cooling channel II24, and a water outlet II26 connected to the other end of the cooling channel II24.
  • the water inlet II25 can be directly connected to an external water source through the water inlet pipe 48, or
  • the water outlet I23 is connected through the water outlet connector 27. When the latter connection is adopted, the water outlet I23 does not need to be connected to the pump water inlet 13 through the connecting pipe 10.
  • the water outlet II26 is connected to the connecting pipe joint 18 of the connecting pipe 10 so that the cooling water enters the pump water inlet 11 through the connecting pipe 10. The water flows through the water inlet pipe 48 and enters the cooling channel II24.
  • the heat generated by the internal mechanical components during the operation of the mini pump 21 will be transferred to the pump housing 58 through the lubricating coolant, and then transferred to the cooling channel II24, and finally It is taken away by the cooling water flowing in it to achieve more efficient heat dissipation.
  • the cooling water can independently enter the cooling channel I17 and the cooling channel II24 to dissipate the heat at the same time, or it can enter the cooling channel I17 and the cooling channel II24 one after another. The person conducts heat dissipation.
  • the pump housing 58 includes a pump head 43 and a pump housing 3 that are connected back and forth to form a sealed cavity II2.
  • the cooling channel II24, the water inlet II25, and the water outlet II26 are all provided on the pump housing 3.
  • Various valves and plungers 13 are installed in the pump head 43, and a swash plate 14 is installed in the pump housing 3.
  • the water inlet II25 is located at a proximal position from the micromotor 22, and the water outlet II26 is located at a distal position from the micromotor 22.
  • the outer surface of the cooling channel II24 is provided with a number of circumferential The direction extends to the heat conducting rib II32 on the outer surface of the pump casing 3.
  • the outer surface of the cooling channel II24 is provided with a plurality of heat conducting ribs III16 extending to the outer surface of the pump casing 3 in the axial direction.
  • the pump housing 3 can also have cooling channels II24 in two extending directions at the same time.
  • the cooling channel II24 extending in the circumferential direction is provided at one end of the pump housing 3 close to the micromotor 22, which is essentially an annular groove provided on the end surface. When the end is connected with the end cover 5, it is sealed by the end cover 5 to form a cooling channel II24 for cooling water to flow inside.
  • the cooling channel II24 extending in the axial direction can communicate with the cooling channel II24 extending in the circumferential direction and the water outlet II26.
  • the mini pump 21 and the micro motor 22 can be coaxially connected to reduce the radial size, or they can be connected at a certain angle, preferably vertically, to reduce the axial size.
  • the mini pump 21 and the mini motor 22 can also be connected by a buckle 34 to further reduce the overall size.
  • the housing 36 has an integrated receiving portion 60 and a holding portion 37.
  • the mini pump 21 and the micro motor 22 are arranged in the receiving portion 60.
  • the holding portion 37 extends obliquely in a direction away from the receiving portion 60, and the holding portion 37 A power switch 44 is provided on it.
  • the power switch 44 is connected in the power supply circuit to realize the start-stop control of the whole machine.
  • the washing machine can be self-powered.
  • the handheld high-pressure washing machine 35 also includes a battery pack 39, the rated voltage of the battery pack 39 is 18-60V; the battery pack 39 is designed
  • the waterproof compartment 40 is provided with a waterproof compartment cover 41.
  • the waterproof compartment cover 41 can adopt a sliding manner to realize the opening and closing of the waterproof compartment 40, and can also adopt a pivoting manner to realize the opening and closing of the waterproof compartment 40, so as to facilitate the taking and placing of the battery pack 39.
  • the waterproof bin cover 41 is sealed with the waterproof bin 40 by the sealing strip 42.
  • the battery pack 39 is connected to the end of the handle 37 in a sealed plug-in connection.
  • the handle 37 is provided with contacts, and the corresponding part of the battery pack 39 is also provided with contacts. After the battery pack 39 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 casing 6 is provided with a lead-out hole from which the power supply wire 51 is drawn, and the motor lead 51 is sealed at the lead-out hole, so as to ensure that the inside of the motor is sealed and ensure electrical safety.
  • the size of the receiving portion 60 of the housing 36 should not be too large, so the outer diameter of the stator core 7 does not exceed 90 mm, and furthermore, the outer diameter of the stator core 7 is 38-58 mm. Similarly, in order to reduce the fatigue of hand-held use, the weight of the hand-held high-pressure cleaner 35 does not exceed 4.2 kg.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Frames (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

一种电机泵单元及包括该电机泵单元的手持式高压清洗机，电机泵单元（20）包括微型电机（22）和迷你泵（21）；电机壳体（29）具有一密封腔I（30）和位于密封腔I（30）内圈的内壳（52），定子铁芯（7）紧贴内壳（52）形成热传导通道；电机壳体（29）设有至少一个冷却通道I（17）、一进水口I（19）和一出水口I（23）；进水口I（19）连接外部水源，出水口I（23）与泵进水口（13）相连通；泵壳体（58）设有至少一个冷却通道II（24）、一进水口II（25）和一出水口II（26）；进水口II（25）连接外部水源或出水口I（23），出水口II（26）连接泵进水口（13）。电机及整机的防水等级可以达到IPX7甚至更高，机器更安全可靠。

Description

一种手持式高压清洗机用电机泵单元及手持式高压清洗机 技术领域
本发明属于手持式清洗机技术领域，具体涉及一种手持式高压清洗机用电机泵单元及手持式高压清洗机。
背景技术
高压清洗机是一种以水或添加有清洗剂的混合液为清洗介质，利用高压水流实现物体表面清洗的设备，高压清洗机可用来清洗汽车、庭院、地面、栏杆、门窗等，使用起来较为高效和方便，其主要组成有喷枪和主机，主机包括电机、泵和电池或外接电源线，喷枪和主机间通过水管连接，喷枪负责根据实际需要形成不同形状的水流，而主机负责将水从市政自来水或水桶中转换成高压水流输送至喷枪中，常见的为主机在地面上固定放置或可移动放置，主机体积较大、重量较重，使用过程通过喷枪进行工作，使用范围受到一定限制，操作起来仍然存在很多不方便的地方。
专利US20090045271A1公开了一种手持电动压力清洗机，包括泵16、电机14、机壳20,以及与机壳20相连的手柄62及侧手柄68，喷嘴58通过枪杆54连接到机壳20，该专利实际公开的是一种低压力的清洗机，其压力无法达到高压清洗机要求，因为国际标准中明确将高压清洗机定义为工作压力大于等于2.5MPa，实际使用中工作压力只有超过2.5MPa时才能达到高压清洗目的，由于高压清洗机直接与水接触，标准中对应手持式高压清洗机防水等级要求不低于IPX7，要求机器置于水下可短时间工作。从专利US20090045271A1公开的技术方案可以看出，电机14尾部设有冷却风叶18，机壳20对应位置设有若干通风口22，通风口22的存在使得所述手持电动压力清洗机的防水等级达不到手持高压清洗机的要求，温升和噪音得不到有效控制。市场上真正需要的是一种手持高压清洗机，电机冷却与防水的矛盾是一直未能解决的行业难题。
专利CN205570600U也公开了一种手持式清洗机，目的在提升清洗机的便携性，解决移动便利性问题。该技术方案与专利US20090045271A1区别在于，US20090045271A1是通过电源线30连接外部电源，由外部电源给电机14供电，而CN205570600U机器上包括电池170，由电池供电，用电池取代外接电源。专利CN205570600U所公开的同样只是一种低压清洗机，并非手持高压清洗机，其工作压力不可能达到和超过高压清洗机所需的2.5MPa压力，CN205570600U没有公开任何电机冷却及防水密封解决方案，其提供的也不是手持式高压清洗机，从CN205570600U说明书附图可以看出电机尾部冷却风口的存在，机壳上对应位置必须留出通风口，其防水等级无法达到手持式高压清洗机防水等级要求，并且存在噪音高、不防水 等缺陷与不足。
作为手持式清洗机，电机和泵的高速运转都会带来温度急剧升高，不仅通过外壳传递给使用者，高温烫手严重影响使用舒适感，而且影响到机器运行效率和寿命。同时开放式机壳及电机运转及风叶旋转所产生的噪音也直接影响到使用者的操作舒适感。
可见，设计一种移动方便、能够直接通过水管连接至外部水源、压力能达到高压清洗机要求、防水等级符合手持高压清洗机要求、高清洁能力、高运行效率、低温、静音的手持式高压清洗机尤为必要。
发明内容
本发明的目的在于克服现有技术中的不足，提供一种手持式高压清洗机，具有冷却效果好、运行噪声低、清洗压力高和防水能力强的特点。
为解决现有技术问题，本发明公开了一种手持式高压清洗机用电机泵单元，包括：外径不超过90mm的微型电机，微型电机包括电机壳体、电机轴、转子和定子铁芯，转子安装在电机轴上，定子铁芯位于转子外部，转子和定子铁芯设于电机壳体内；
迷你泵包括泵壳体、泵进水口和高压出水口；
电机壳体具有一密封腔I和内壳，内壳的内表面紧贴定子铁芯形成热传导通道；电机壳体设有至少一个途经内壳的冷却通道I、一连通冷却通道I一端的进水口I和一连通冷却通道I另一端的出水口I；进水口I连接外部水源，出水口I与泵进水口相连通；
泵壳体设有至少一个冷却通道II、一连通冷却通道II一端的进水口II和一连通冷却通道II另一端的出水口II；进水口II连接外部水源或出水口I，出水口II连接泵进水口。
进一步地，冷却通道I为两个以上时，电机壳体还设有连通冷却通道I进水端的分流通道和连通冷却通道I出水端的汇流通道。
进一步地，冷却通道I沿平行于电机壳体的轴线方向延伸，分流通道沿平行于电机壳体的直径方向延伸，汇流通道沿电机壳体的周向延伸。
进一步地，电机壳体包括轴向密封相连的端盖和机壳，机壳为一端开口、另一端封闭的罐状体，端盖密封安装在机壳的开口处，端盖连接迷你泵；进水口I、冷却通道、分流通道和汇流通道均设于机壳上，出水口I设于端盖上。
进一步地，机壳的开口处有沿其周向延伸而成的环形槽，端盖与环形槽密封连接后形成汇流通道。
进一步地，端盖的中心孔中安装轴承II，机壳的中心孔安装轴承I，电机轴的两端分别安装于轴承I和轴承II中；分流通道从轴承I安装位置的机壳外部附近经过。
进一步地，机壳为一体加工成型的结构体。
进一步地，冷却通道I的外表面设有若干向电机壳体的外表面延伸的导热筋I。
进一步地，电机壳体上设有供电机导线引出的引出孔，电机导线在引出孔处密封设置。
进一步地，微型电机为稀土永磁无刷电机，微型电机的防水等级不低于IPX7，迷你泵的最小工作压力不低于2.5Mpa。
进一步地，进水口II位于距离微型电机的近端位置，出水口II位于距微型电机的远端位置；
当冷却通道II沿平行于泵壳体的轴线方向延伸时，冷却通道II外表面设有若干延伸至泵壳体外表面的导热筋II；当冷却通道II沿泵壳体的圆周方向延伸时，冷却通道II外表面设有若干延伸至泵壳体外表面的导热筋III。
进一步地，泵壳体包括前后连接以形成密封腔II的泵头和泵壳，冷却通道II、出水口II和进水口II均设于泵壳上。
进一步地，泵壳靠近微型电机的一端设有端盖，端盖与微型电机连接。
进一步地，迷你泵为柱塞泵，其还包括至少一个柱塞和一斜盘，柱塞和斜盘均设于泵壳体的密封腔II内，斜盘受微型电机的驱动而带动柱塞沿直线运动。
进一步地，迷你泵与微型电机同轴连接或以一定角度连接。
进一步地，迷你泵的泵壳体和微型电机的电机壳体之间通过卡扣连接。
进一步地，迷你泵与微型电机之间还设有减速机构，减速机构为行星齿轮减速机构并且设于连接在迷你泵与微型电机之间的端盖内。
本发明还公开了一种手持式高压清洗机，包括：外壳和喷枪；
还包括上述的手持式高压清洗机用电机泵单元，外壳密封包裹电机泵单元，喷枪连接高压出水口。
进一步地，外壳具有一体连接的收容部和手持部，电机泵单元设于收容部内，手持部沿背离收容部的方向倾斜延伸，手持部上设有电源开关。
进一步地，手持高压清洗机还包括电池包，电池包的额定电压为18～60V；电池包设于手持部内或可分离地设于手持部端部的防水仓内，防水仓设有防水仓盖，防水仓盖通过密封条与防水仓形成密封。
进一步地，手持高压清洗机还包括电池包，电池包的额定电压为18～60V；电池包与手持部的端部密封插拔连接。
进一步地，手持式高压清洗机的重量不超过4.2kg，其防水等级不低于IPX7。
本发明具有的有益效果：
1、本发明中，微型电机采用水冷替代现有的风冷，因而可以通过密封设计(即外壳上无任何风口)使电机及整机的防水等级可以达到IPX7甚至更高，从而使机器更加安全可靠，符合手持式高压清洗机的防水要求，在给电机水冷同时对泵体进行水冷，进一步降低泵的温度，使得整体温升降低，整机寿命得到同步提升。
2、本发明中，电机采用非循环水进行冷却，冷却效果大大提升，电机温度明显降低，电机发热问题得到有效解决，电机效率得以提升，消耗同样功率下输出压力及流量得到提升，出水压力可以达到甚至超过2.5MPa，显著提高清洗能力，在更加便捷的基础上，应用范围也得到了拓宽。
3、本发明中，对于永磁电机或稀土永磁无刷电机，采用水冷方案后，电机永磁材料温度得到很好控制，有效解决了永磁体或稀土永磁材料的高温退磁问题，有效防止不可逆的退磁造成电机失效，电机可靠性得到大幅提高。
4、本发明中，电机采用水冷后，免除风叶噪音，由于电机壳体是封闭的，并且外壳上没有任何进、出风口，机器变得更静音，体积更紧凑，有效防止噪音对人的伤害。
附图说明
图1为本发明中一个优选实施例的结构示意图；
图2为图1所示实施例中电机泵单元的结构立体图；
图3为图1所示实施例中电机泵单元的结构主视图(电机与迷你泵分离状态)；
图4为图1所示实施例中电机泵单元的结构主视图(电机与迷你泵连接状态)；
图5为图1所示实施例中电机泵单元的结构右视图；
图6为图1所示实施例中电机泵单元的结构剖视图；
图7为图6中沿剖面线AA的剖视图；
图8为图6中沿剖面线BB的剖视图；
图9为图1所示实施例中泵壳的结构立体图；
图10为图1所示实施例中电机的立体剖视图；
图11为图10中C处的局部放大图。
附图标记：
1柱塞；2密封腔II；3泵壳；4减速机构；5端盖；6机壳；7定子铁芯；8转子；9电机轴；10连接管；11轴承I；12轴承II；13泵进水口；14高压出水口；15分流通道；16导热筋III；17冷却通道I；18汇流通道；19进水口I；20电机泵单元；21迷你泵；22微 型电机；23出水口I；24冷却通道II；25进水口II；26出水口II；27出水接头；28连接管接头；29电机壳体；30密封腔I；31导热筋I；32导热筋II；33斜盘；34卡扣；35手持式高压清洗机；36外壳；37手持部；38喷枪；39电池包；40防水仓；41防水仓盖；42密封条；43泵头；44电源开关；45进水接头密封圈；46进水接头；47进水管连接头；48进水管；49第一密封圈；50第二密封圈；51电机导线；52内壳；53端盖内壁；54端盖外壁；56壳外壁；57出水接头密封圈；58泵壳体；59环形槽；60收容部；图中箭头所指示方向为水流方向。
具体实施方式
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
如图1至11所示，一种手持式高压清洗机35，包括：喷枪38、电机泵单元20和外壳36，外壳36密封包裹电机泵单元20。
电机泵单元20包括迷你泵21和外径不超过90mm的微型电机22，微型电机22与迷你泵21相连接从而驱动迷你泵21工作，此处的连接一方面指微型电机22与迷你泵21在结构上需要连接实现在外壳36内的固定，另一方面指微型电机22与迷你泵21在动力上需要连接实现扭矩的传递。
迷你泵21具有泵进水口13和高压出水口14。高压出水口14连接喷枪38从而将高压水流以一定形态喷出，实现清洗范围的调节。
微型电机22包括电机壳体29；电机壳体29内安装电机轴9、转子8和定子铁芯7；电机轴9的两端分别通过一轴承I11和轴承II12转动安装在电机壳体29内，转子8安装在电机轴9上从而传递扭矩，定子铁芯7位于转子8外部，通过电磁原理产生扭矩使转子8旋转。电机壳体29具有一密封腔I30和内壳52，该内壳52围绕在定子铁芯7的外周并且使定子铁芯7紧贴内壳52以形成热传导通道，定子铁芯7产生的热量因此而传导到内壳52上以便于后续的散热。
为了实现水冷散热的目的，电机壳体29设有至少一个途经内壳52、尤其是其外表面的冷却通道I17、一连通冷却通道I17一端的进水口I19和一连通冷却通道I17另一端的出水口I23，进水口I19处通过进水接头密封圈45密封安装一进水接头46，通过进水接头46可以实现与进水管48的进水管连接头47连接。
进水管48的另一端连接外部水源，出水口I23处通过出水接头密封圈57安装一出水接头27，出水接头27可以通过连接管10直接与泵进水口13相连通。外部水源的清洗水在未 加压时先作为冷却水在冷却通道I17中吸收来自定子铁芯7传导到内壳52上的热量，然后再进入迷你泵21中进行加压形成清洗所用的高压水流。由于采用水冷方式使得外壳36整体无风冷开口，可以完全密封而达到较高的防水等级IPX7，符合手持高压清洗机的标准。此外，由于水冷方式的冷却能力得到提升，因此微型电机22的功率也可以得到提升，使得迷你泵21的出水压力达到高压标准，即不低于2.5MPa，大大提升了清洗能力。
为了进一步提升冷却能力，冷却通道I17的数目可以设置两个以上，此时为了方便进出水，电机壳体29还设有连通冷却通道I17进水端的分流通道15和连通冷却通道I17出水端的汇流通道18。冷却水经进水口I19进入分流通道15，然后再分流到每一个冷却通道I17中对电机壳体29进行冷却，然后再通过汇流通道18汇集后从出水口I23排出到迷你泵21中。
为了保证冷却效果并且便于加工制造，电机壳体29包括轴向密封相连以形成密封腔I30的端盖5和机壳6，机壳6为一端开口、另一端封闭且一体加工成型的的罐状体，端盖5密封安装在机壳6的开口处，端盖5与迷你泵21连接从而实现电机29与迷你泵21的连接固定。端盖5靠近迷你泵21，机壳6远离迷你泵21；进水口I19、冷却通道17、分流通道15和汇流通道18均设于机壳6上，出水口I23设于端盖5上。作为一种典型的结构方式，冷却通道I17沿平行于机壳6的轴线方向延伸，分流通道15沿平行于机壳6的直径方向延伸，汇流通道18沿机壳6的周向延伸。
由于电机壳体29采取轴向分体式结构，因此汇流通道18可以这样设置，如图10和11所示，机壳6的开口处有沿其周向延伸而成的环形槽59，环形槽59的内侧为内壳52、外侧形成一圈壳外壁56，同样地，端盖5也具有一圈端盖内壁53和一圈端盖外壁54，端盖内壁53通过第一密封圈49与内壳52形成密封连接，端盖外壁54通过第二密封圈50与壳外壁56形成密封连接，通过密封连接使环形槽59形成供冷却水流动的汇流通道18。
为了实现电机轴9的安装，端盖5的中心孔中安装轴承II12，机壳6的中心孔安装轴承I11，电机轴9的两端分别安装于轴承I11和轴承II12中。
由于电机壳体29上存在没有设置冷却通道I17的部位，为了实现这些部位能够散热，冷却通道I17的外表面设有若干向电机壳体29的外表面延伸的导热筋I31，导热筋I31可以延伸到机壳6上，也可以延伸到端盖5上从而实现冷却能力的进一步提高。
为了提高迷你泵21的加压能力，迷你泵21与微型电机22之间设有减速机构4。端盖5为圆柱状结构因此具有一收容腔，减速机构4设于端盖5的收容腔内。减速机构4为行星齿轮减速机构。微型电机22为稀土永磁无刷电机。
为了进一步提高电机泵单元20的冷却能力，迷你泵21也采取水冷方式进行散热。具体 地，迷你泵21为柱塞泵，其包括至少一个柱塞1、一斜盘33和一泵壳体58，优选有三个柱塞1。泵壳体58具有一密封腔II2，密封腔II2容纳柱塞1、斜盘33和润滑冷却剂，柱塞1在柱塞腔内往复运动，其在密封腔II2内的一端与斜盘33的盘面滑动接触，斜盘33受微型电机22的驱动而带动柱塞1沿直线运动。
泵壳体58设有至少一个冷却通道II24、一连通冷却通道II24一端的进水口II25和一连通冷却通道II24另一端的出水口II26，进水口II25可以通过进水管48直接连接外部水源，也可以通过出水接头27连接所述出水口I23，当采用后一种方式连接时，出水口I23无需通过连接管10连接泵进水口13。出水口II26连接连接管10的连接管接头18使冷却水通过连接管10进入泵进水口11。水流经过进水管48进入冷却通道II24中，迷你泵21在运行过程中由于内部机械部件运转而产生的热量会通过润滑冷却剂传导至泵壳体58上，然后再传导至冷却通道II24上，最后被其内流动的冷却水带走，实现更高效率的散热。
当微型电机22和迷你泵21均采用水冷方式散热时，冷却水可独立进入冷却通道I17和冷却通道II24中同时对两者进行散热，也可先后进入冷却通道I17和冷却通道II24中依次对两者进行散热。
泵壳体58包括前后连接以形成密封腔II2的泵头43和泵壳3，冷却通道II24、进水口II25和出水口II26均设于泵壳3上。泵头43内安装各种阀和柱塞13，泵壳3内安装斜盘14。
进水口II25位于距离微型电机22的近端位置，出水口II26位于距微型电机22的远端位置。如图9所示，当冷却通道II24沿平行于泵壳3的轴线方向延伸时，为了更好地将泵壳3的热量传导至冷却通道II24上时，冷却通道II24外表面设有若干沿圆周方向延伸至泵壳3外表面的导热筋II32。当冷却通道II24沿泵壳3的圆周方向延伸时，冷却通道II24外表面设有若干沿轴向延伸至泵壳3外表面的导热筋III16。泵壳3上也可同时具有两种延伸方向的冷却通道II24，沿圆周方向延伸的冷却通道II24设于泵壳3的靠近微型电机22的一端，其实质为设于该端端面上的环形槽，当该端与端盖5连接时被端盖5密封从而形成供冷却水在其内部流动的冷却通道II24。沿轴向延伸的冷却通道II24可连通沿圆周方向延伸的冷却通道II24和出水口II26。
迷你泵21和微型电机22可以同轴连接，从而减小径向尺寸，也可以以一定角度连接，优选垂直连接，从而减小轴向尺寸。迷你泵21和微型电机22之间还可通过卡扣34连接，从而进一步减少整体尺寸。
如图1所示，外壳36具有一体连接的收容部60和手持部37，迷你泵21和微型电机22 设于收容部60内，手持部37沿背离收容部60的方向倾斜延伸，手持部37上设有电源开关44。电源开关44连接在供电电路中实现整机的启停控制。
为了提高清洗机的应用范围，减少外部线缆，清洗机可采用自供电方式，具体地，手持高压清洗机35还包括电池包39，电池包39的额定电压为18～60V；电池包39设于手持部37内或可分离地设于手持部37端部的防水仓40内，防水仓40设有防水仓盖41。防水仓盖41可以采取滑动式方式实现防水仓40的开合，也可以采取枢接方式实现防水仓40的开合，以便于电池包39的取放。防水仓盖41通过密封条42与防水仓40形成密封。作为替代方案，电池包39与手持部37的端部密封插拔连接，具体地，手持部37设有触点，电池包39对应部位也设有触点，电池包39插接到位后，两者的触点相连形成完整的供电回路，同时满足防水要求。
机壳6上设有供电机导线51引出的引出孔，电机导线51在引出孔处密封设置，从而确保电机内部为密封状态，保证电气安全。
为了提高手握体验度，外壳36的收容部60的尺寸不宜过大，因此定子铁芯7的外径不超过90mm，更进一步地，定子铁芯7的外径为38～58mm。同样地，为了降低手持使用的疲劳感，手持式高压清洗机35的重量不超过4.2公斤。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变形，这些改进和变形也应视为本发明的保护范围。

Claims (22)

  1. 一种手持式高压清洗机用电机泵单元(20)，包括：
    外径不超过90mm的微型电机(22)，所述微型电机(22)包括电机壳体(29)、电机轴(9)、转子(8)和定子铁芯(7)，所述转子(8)安装在所述电机轴(9)上，所述定子铁芯(7)位于所述转子(8)外部；
    迷你泵(21)，所述迷你泵(21)包括泵壳体(58)、泵进水口(13)和高压出水口(14)；
    其特征在于：
    所述电机壳体(29)具有一密封腔I(30)和内壳(52)，所述转子(8)和所述定子铁芯(7)设于所述密封腔I(30)内，所述内壳(52)的内表面紧贴所述定子铁芯(7)形成热传导通道；所述电机壳体(29)设有至少一个途经所述内壳(52)的冷却通道I(17)、一连通所述冷却通道I(17)一端的进水口I(19)和一连通所述冷却通道I(17)另一端的出水口I(23)；所述进水口I(19)连接外部水源，所述出水口I(23)与所述泵进水口(13)相连通；
    所述泵壳体(58)设有至少一个冷却通道II(24)、一连通所述冷却通道II(24)一端的进水口II(25)和一连通所述冷却通道II(24)另一端的出水口II(26)；所述进水口II(25)连接外部水源或所述出水口I(23)，所述出水口II(26)连接所述泵进水口(13)。
  2. 根据权利要求1所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述冷却通道I(17)为两个以上时，所述电机壳体(29)还设有连通冷却通道I(17)进水端的分流通道(15)和连通冷却通道I(17)出水端的汇流通道(18)。
  3. 根据权利要求2所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述冷却通道I(17)沿平行于所述电机壳体(29)的轴线方向延伸，所述分流通道(15)沿平行于所述电机壳体(29)的直径方向延伸，所述汇流通道(18)沿所述电机壳体(29)的周向延伸。
  4. 根据权利要求2所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述电机壳体(29)包括轴向密封相连形成所述密封腔I(30)的端盖(5)和机壳(6)，所述机壳(6)为一端开口、另一端封闭的罐状体，所述端盖(5)密封安装在所述机壳(6)的开口处，所述端盖(5)连接所述迷你泵(21)；所述进水口I(19)、冷却通道(17)、分流通道(15)和汇流通道(18)均设于所述机壳(6)上，所述出水口I(23)设于所述端盖(5)上。
  5. 根据权利要求4所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述机壳(6)的开口处有沿其周向延伸而成的环形槽(59)，所述端盖(5)与所述环形槽(59) 密封连接后形成所述汇流通道(18)。
  6. 根据权利要求4所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述端盖(5)的中心孔中安装轴承II(12)，所述机壳(6)的中心孔安装轴承I(11)，所述电机轴(9)的两端分别安装于所述轴承I(11)和所述轴承II(12)中；所述分流通道(15)从所述轴承I(11)安装位置的机壳(6)外部附近经过。
  7. 根据权利要求4所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述机壳(6)为一体加工成型的结构体。
  8. 根据权利要求1至7任一所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述冷却通道I(17)的外表面设有若干向所述电机壳体(29)的外表面延伸的导热筋I(31)。
  9. 根据权利要求1至7任一所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述电机壳体(29)上设有供电机导线(51)引出的引出孔，所述电机导线(51)在所述引出孔处密封设置。
  10. 根据权利要求1至7任一所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述微型电机(22)为稀土永磁无刷电机，所述微型电机(22)的防水等级不低于IPX7，所述迷你泵(21)的最小工作压力不低于2.5Mpa。
  11. 根据权利要求1所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述进水口II(25)位于距离所述微型电机(22)的近端位置，所述出水口II(26)位于距所述微型电机(22)的远端位置；
    当所述冷却通道II(24)沿平行于所述泵壳体(58)的轴线方向延伸时，所述冷却通道II(24)外表面设有若干延伸至所述泵壳体(58)外表面的导热筋II(32)；当所述冷却通道II(24)沿所述泵壳体(58)的圆周方向延伸时，所述冷却通道II(24)外表面设有若干延伸至所述泵壳体(58)外表面的导热筋III(16)。
  12. 根据权利要求11所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述泵壳体(58)包括前后连接以形成密封腔II(2)的泵头(43)和泵壳(3)，所述冷却通道II(24)、出水口II(26)和进水口II(25)均设于所述泵壳(3)上。
  13. 根据权利要求11所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述泵壳(3)靠近所述微型电机(22)的一端设有端盖(4)，所述端盖(4)与所述微型电机(22)连接。
  14. 根据权利要求1、11至13任一所述一种手持式高压清洗机用电机泵单元(20)，其 特征在于：所述迷你泵(21)为柱塞泵，其还包括至少一个柱塞(1)和一斜盘(33)，所述柱塞(1)和所述斜盘(33)均设于所述泵壳体(3)的密封腔II(2)内，所述斜盘(33)受所述微型电机(22)的驱动而带动所述柱塞(1)沿直线运动。
  15. 根据权利要求1所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述迷你泵(21)与所述微型电机(22)同轴连接或以一定角度连接。
  16. 根据权利要求1所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述迷你泵(21)的泵壳体(58)和所述微型电机(22)的电机壳体(29)之间通过卡扣(34)连接。
  17. 根据权利要求1所述一种手持式高压清洗机用电机泵单元(20)，其特征在于：所述迷你泵(21)与所述微型电机(22)之间还设有减速机构(4)，所述减速机构(4)为行星齿轮减速机构并且设于连接在所述迷你泵(21)与所述微型电机(22)之间的端盖(5)内。
  18. 一种手持式高压清洗机(35)，包括：
    外壳(36)和喷枪(38)；
    其特征在于：还包括权利要求1所述的手持式高压清洗机用电机泵单元(20)，所述外壳(36)密封包裹所述手持式高压清洗机用电机泵单元(20)，所述喷枪(38)连接所述高压出水口(14)。
  19. 根据权利要求18所述一种手持式高压清洗机(35)，其特征在于：所述外壳(36)具有一体连接的收容部(60)和手持部(37)，所述手持式高压清洗机用电机泵单元(20)设于所述收容部(60)内，所述手持部(37)沿背离所述收容部(60)的方向倾斜延伸，所述手持部(37)上设有电源开关(44)。
  20. 根据权利要求19所述一种手持式高压清洗机(35)，其特征在于：所述手持高压清洗机(39)还包括电池包(39)，所述电池包(39)的额定电压为18～60V；所述电池包(39)设于所述手持部(37)内或可分离地设于所述手持部(37)端部的防水仓(40)内，所述防水仓(40)设有防水仓盖(41)，所述防水仓盖(41)通过密封条(42)与所述防水仓(40)形成密封。
  21. 根据权利要求19所述一种手持式高压清洗机(35)，其特征在于：所述手持高压清洗机(39)还包括电池包(39)，所述电池包(39)的额定电压为18～60V；所述电池包(39)与所述手持部(37)的端部密封插拔连接。
  22. 根据权利要求18至21任一所述一种手持式高压清洗机(35)，其特征在于：所述手持式高压清洗机(35)重量不超过4.2kg，其防水等级不低于IPX7。
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