WO2019076349A1

WO2019076349A1 - Hand-held high-pressure cleaning machine

Info

Publication number: WO2019076349A1
Application number: PCT/CN2018/110891
Authority: WO
Inventors: 乔勇
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2017-10-18
Filing date: 2018-10-18
Publication date: 2019-04-25

Abstract

Provided is a hand-held high-pressure cleaning machine (100), comprising: a housing (102); a switch (105); and functional components including an electrical motor (10) and a water pump (30) both accommodated in the housing (102), wherein the electrical motor (10) is directly connected to the water pump (30), the water pump (30) comprises a pump body (31) and a plunger (35) provided in the pump body (31), only one plunger (35) is provided, the electrical motor (10) comprises a motor shaft (13), and the period of rotation of the motor shaft (13) is equal to the period of reciprocating motion of the plunger (35).

Description

Handheld pressure washer

Technical field

The invention relates to the field of cleaning equipment, and in particular to a hand-held high pressure cleaner.

Background technique

Cleaning needs have been widespread in both family and outdoor activities. In family life centered on the family courtyard, people often need to clean balconies, walkways, outdoor tables and chairs, barbecues, cars, bicycles, garages, pets, garden tools, windows, swimming pools, outdoor steps, and so on. These items are located outside the house due to the use of the scene, and will inevitably be stained with dirt, oil stains, leaves, dust, etc. It is extremely inconvenient to clean with a rag, and it is necessary to use a water stream or even a high-pressure water stream for spraying. In order to meet the above requirements, the solution on the market is to provide a domestic high pressure cleaner.

The emergence of high-pressure cleaners has brought great convenience to people's lives. It can be used to clean such as cars, doors and windows, courtyard roads, etc., which is efficient, safe and convenient. The washing machine mainly comprises a main machine, a spray gun and a connecting pipe. The main body includes a battery or a power line, a pump and a motor, and the connecting pipe is connected to the main machine and the spray gun. However, the general high pressure cleaner is bulky and inconvenient to move.

Summary of the invention

Based on this, it is necessary to provide a miniaturized hand-held high-pressure cleaner for the problem of a large volume of a conventional high-pressure cleaner.

A hand-held high-pressure cleaner comprising: a casing comprising a handle for gripping and a body portion disposed at an angle to the handle, the body portion having a liquid outlet for discharging liquid at one end; and a switch disposed at On the outer casing, for controlling the opening and closing of the liquid flow channel and/or the circuit; the functional component comprises a motor and a water pump housed in the outer casing, the motor is directly connected to the water pump, and the water pump comprises a pump body And a plunger disposed in the pump body, the number of the plungers is only one, the motor includes a motor shaft, and the motor shaft drives the plunger to reciprocate in the pump body, the motor shaft The period of rotation is equal to the period of reciprocation of the plunger.

In a preferred embodiment, the motor is an outer rotor motor, the outer rotor motor includes a fixed stator coil, an outer rotor surrounding the stator coil, and the outer rotor includes a plurality of opposing stator coils Permanent magnets arranged circumferentially.

In a preferred embodiment, the functional component further includes a transmission mechanism connected between the motor shaft and the plunger, and the outer rotor motor rotates the motor shaft through the transmission mechanism Converted into a reciprocating motion of the plunger.

In a preferred embodiment, the length extension direction of the plunger is perpendicular to the extending direction of the motor shaft, and the outer rotor motor is away from the end of the plunger in the extending direction of the motor shaft. The axial distance from the centerline of the plunger ranges from 70 mm to 150 mm.

In a preferred embodiment, the hand-held high-pressure cleaner further includes a battery pack for supplying energy to the outer rotor motor, the battery pack voltage is 18V-20V, and the capacity is 2Ah-6Ah, when the handheld The pressure of the high pressure cleaner is 2MPa-3MPa, the flow rate is 120L/h-200L/h, and the continuous working time of the battery pack is 8min-40min.

In a preferred embodiment, the hand-held high-pressure cleaner further includes a battery pack for supplying energy to the outer rotor motor, the battery pack has a voltage of 36-40V and a capacity of 2.5Ah-9Ah. The hand-held high pressure cleaner has a discharge pressure of 2 MPa to 5 MPa, a flow rate of 200 L/h to 280 L/h, and a continuous operation time of the battery pack of 7 min to 50 min.

In a preferred embodiment, the handheld high pressure cleaner further includes a battery pack for supplying energy to the outer rotor motor, the battery pack having a voltage of 50V-60V and a capacity of 4Ah-9Ah, when The hand-held high pressure cleaner has a discharge pressure of 3 MPa to 5 MPa, a flow rate of 200 L/h to 280 L/h, and a continuous working time of the battery pack of 12 min to 60 min.

In a preferred embodiment, the plunger has a diameter ranging from 10 mm to 14 mm and the plunger has a stroke ranging from 3 mm to 6 mm.

In a preferred embodiment, the outer rotor motor has a rotational speed ranging from 2000 r/min to 4000 r/min.

In a preferred embodiment, the liquid outlet, the water pump and the outer rotor motor are arranged in order from front to back within the outer casing.

In a preferred embodiment, the transmission mechanism is an eccentric mechanism coupled between the motor shaft and the plunger.

In a preferred embodiment, the eccentric mechanism includes a drive shaft coupled to the motor shaft and an eccentric shaft eccentrically disposed with the drive shaft, the drive shaft being in an interference connection with the motor shaft.

In a preferred embodiment, the plunger is provided with a connecting portion connecting the eccentric mechanism, the connecting portion is substantially at an intermediate position in the extending direction of the length of the plunger, and the eccentric mechanism drives the plunger In the reciprocating motion, the connecting portion is a cavity formed by the plunger recessed inward, and the eccentric mechanism further includes a connecting bearing sleeved on the eccentric shaft, and the connecting bearing is disposed in the concave Inside the cavity and connected to the eccentric shaft.

In a preferred embodiment, the water pump further includes a water inlet passage and a water outlet passage disposed through the pump body, and a first pump cover and a second pump cover disposed at two ends of the pump body, the water pump further The first high pressure chamber formed in the first pump cover and the second high pressure chamber formed in the second pump cover, the two ends of the plunger respectively extending into the first high pressure chamber and the first Reciprocatingly moving in the receiving chamber to alternately compress or release the first high pressure chamber or the second high pressure chamber, the water inlet passage and the first high pressure The chamber and the second high pressure chamber are in communication connection, and the water outlet passage is in communication with the first high pressure chamber and the second high pressure chamber, respectively.

In a preferred embodiment, the motor is a reciprocating output motor, and the reciprocating output motor is directly connected to the plunger and drives the plunger to reciprocate in the receiving cavity.

In a preferred embodiment, one end of the length direction of the plunger is provided with a connecting portion, a motor shaft of the reciprocating output motor is connected to the connecting portion, and the pump further includes a pump cover, Forming a high pressure chamber between the pump cover and the pump body, the other end of the plunger extends into the high pressure chamber, and is driven by the reciprocating output motor to reciprocate in the high pressure chamber

The motor in the hand-held high-pressure cleaner is directly connected to the water pump for providing driving force to the water pump. The water pump includes a pump body having a receiving cavity and a plunger disposed in the receiving cavity, and the motor can drive the plunger to reciprocate in the receiving cavity. Movement to form a high-pressure water stream for cleaning cars, doors and windows, etc., and the motor is directly connected to the water pump to save the intermediate mechanism between the motor and the water pump (such as a reduction gear box, etc.), reducing the volume of the entire handheld high-pressure cleaner Easy to move and increase the cleaning range.

DRAWINGS

1 is a schematic structural view of a hand-held high-pressure cleaner according to a first embodiment of the present invention;

Figure 2 is a schematic structural view of the functional components of the hand-held high pressure cleaner shown in Figure 1;

3 is a schematic structural view of a hand-held high-pressure cleaner according to a second embodiment of the present invention;

4 is a schematic view showing a connection structure of functional components of a hand-held high-pressure cleaner according to another embodiment;

FIG. 5 is a schematic diagram showing the connection structure of functional components of a hand-held high pressure cleaner in another embodiment; FIG.

Fig. 6 is a schematic view showing the connection structure of functional components of the hand-held high-pressure cleaner in another embodiment.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the understanding of the present disclosure will be more fully understood.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning meaning meaning The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

As shown in FIG. 1 , a handheld high-pressure cleaner 100 in an embodiment of the present invention includes a housing 102 and a functional component housed in the housing 102. The functional component includes a motor 10 and a water pump 30. The motor 10 is directly connected to the water pump 30. There is no speed reduction mechanism in the middle. The outer casing includes a handle 101 for gripping and a main body portion 108 disposed at an angle with the handle 101. The outer casing 102 is further provided with a liquid inlet end 106 configured to be connected to the external water pipe and a liquid outlet port 104 for discharging the cleaning liquid. The motor 10 and the water pump 30 are disposed in the main body portion 108, and the liquid outlet 104 is disposed at the front end of the main body portion 108, and the liquid outlet 104, the water pump 30, and the motor 10 are sequentially arranged from front to back. The hand-held high-pressure cleaner 100 further includes a switch trigger 105 disposed near the handle for controlling the opening and closing of the liquid flow path and/or the circuit, and is disposed on the outer casing, and can be adopted when the operator holds the handle 101 with one hand. The switch trigger 105 is simultaneously controlled by the same hand.

In this embodiment, the switch trigger 105 simultaneously controls the on and off of the liquid flow path and the on and off of the circuit, so that the hand-held high-pressure cleaner can be activated only by operating the switch trigger 105. Preferably, the switch trigger 105 is sequentially opened during operation. The flow channel and the circuit, that is to say, the liquid flow channel is opened first and then the circuit is turned on, thus avoiding the endless loss of the functional components and the waste of energy caused by the liquid flow channel not being turned on.

To increase the portability of the handheld high pressure cleaner, the handheld high pressure cleaner also includes a power source coupled to the housing 102 that provides electrical energy to the motor 10. Moreover, the power source is specifically a rechargeable battery pack 109, and is detachably mounted on the outer casing 102 to improve the portability of the handheld high-pressure cleaner 100, and the rechargeable battery can be charged in advance to reserve electric energy.

The motor 10 in the hand-held high pressure cleaner 100 described above is directly connected to the water pump 30 for providing a driving force to the water pump 30. The water pump 30 is a plunger pump, and includes a pump body 31 having a receiving cavity and a plunger 35 disposed in the receiving cavity. The direct connection here is understood to be that there is no speed reducing mechanism between the motor 10 and the water pump 30, and the rotational motion of the motor 10 is directly converted. The reciprocating motion of the plunger of the water pump 30. The motor 10 drives the plunger 35 to reciprocate in the receiving cavity to form a high-pressure water flow for cleaning the automobile, doors and windows, etc., and the motor 10 is directly connected to the water pump 30, and the speed reduction mechanism between the motor 10 and the water pump 30 is omitted (such as deceleration). The box, etc., reduces the volume and weight of the entire handheld high-pressure cleaner 100, making the high-pressure cleaner more portable, while eliminating the speed reduction mechanism simplifies the transmission mechanism, thereby reducing the mechanical loss of the transmission process and improving the transmission efficiency.

The receiving cavity is disposed through the pump body 31, and the plunger 35 is slidably disposed in the receiving cavity. Both ends of the plunger 35 can protrude from both ends of the receiving cavity, and reciprocate in the receiving cavity under the driving of the motor 10, thereby The length of the two ends of the plunger extending out of the receiving cavity is alternately changed.

In this embodiment, the water pump 30 further includes a pump cover disposed at both ends of the pump body. Specifically, the pump cover includes a first pump cover and a second pump cover, and the first pump cover and the second pump cover are each provided with a groove, and the groove forms a high pressure chamber for pressurizing the cleaning liquid. The high pressure chamber includes a first high pressure chamber formed in the first pump cover and a second high pressure chamber formed in the second pump cover, the two ends of the plunger 35 respectively extending into the first high pressure chamber and the second high pressure The chamber is driven to reciprocate within the containment chamber to alternately compress or release the first high pressure chamber or the second high pressure chamber.

The water pump 30 further includes a water inlet passage and a water outlet passage disposed through the pump body, and the water inlet passage and the water outlet passage extend in the same direction as the length of the plunger 35, and are located on the same side of the plunger 35, specifically away from the motor. One side. The water inlet passage is respectively connected with the first high pressure chamber and the first high pressure chamber through a set of water inlet check valves, and the water outlet passage is connected with the first high pressure chamber and the second high pressure chamber through a group of water outlet check valves respectively. . The water inlet check valve and the water outlet check valve are alternately opened or closed by the reciprocating motion of the plunger, thereby controlling the communication passage of the water inlet passage with the first high pressure chamber and the second high pressure chamber, and the water outlet The passage is connected to and disconnected from the first high pressure chamber and the second high pressure chamber.

The inlet check valve can only allow water to flow through the first and second high pressure chambers, and the outlet check valve can only allow water to flow through the first and second high pressure chambers, and the inlet check valve and the outlet check valve The opening and closing is related to the water pressure in the high pressure chamber, and the inlet check valve and the outlet check valve can be controlled by the change of the water pressure. The plunger 35 is driven to alternately squeeze or release the high pressure chamber to change the pressure within the high pressure chamber to drive the water inlet check valve and the water outlet check valve open or closed.

Preferably, the plunger 35 is made of a metal material, and the two ends of the plunger 35 are hollow and filled with a material having a lower density, so that the mass of the plunger can be alleviated, thereby reducing the vibration problem of the plunger 35 during the reciprocating motion. At the same time, the power of the propulsion plunger is also reduced, and the energy consumption is reduced. In this embodiment, the filling material is plastic, and in other embodiments, a resin or a light metal such as aluminum may also be used.

In one embodiment, the motor 10 is a low-speed motor, and the output speed of the low-speed motor can meet the rotational speed requirement of the water pump 30, and the low-speed motor can be directly connected to the water pump 30, and the motor 10 and the water pump 30 can be omitted. The speed reduction mechanism between the two simplifies the transmission structure and improves the transmission efficiency. Specifically, the low-speed motor speed ranges from 2000r/min to 3500r/min, and may also be 2000r/min-3000r/min. In a preferred embodiment, the low-speed motor has a rotational speed range of 2100r/min-3500r/ Min, in another preferred embodiment, the speed of the motor is as low as 1500 r/min - 1900 r/min.

In one embodiment, the functional component further includes a transmission mechanism directly connected between the motor 10 and the plunger for converting the rotational motion of the motor into the reciprocating motion of the plunger 35, and the transmission mechanism is directly connected to the motor 10. The rotary motion of the motor is converted to drive the plunger to reciprocate in the receiving cavity of the pump body to compress the water flow.

Further, the transmission mechanism is an eccentric mechanism 37. The eccentric mechanism 37 is directly connected to the low-speed motor, and drives the plunger 35 to reciprocate in the receiving cavity of the pump body 30. Thus, the eccentric mechanism 37 converts the rotational motion of the low-speed motor into The reciprocating motion of the plunger 35 in the pump body, thereby reciprocating the water in the high pressure chamber by the reciprocating motion of the plunger 35, increases the pressure of the water in the high pressure chamber.

Specifically, the eccentric mechanism 37 includes a transmission shaft 375 and an eccentric shaft 372 disposed eccentrically with the transmission shaft. The eccentric shaft 372 is disposed at one end of the transmission 375 shaft, and the axis of the eccentric shaft 372 is disposed away from the axis of the transmission shaft, and the transmission shaft 375 Direct connection to the motor.

More specifically, the motor 10 includes a motor shaft 13 that is directly coupled to the motor shaft 13, and the motor shaft 13 drives the plunger 35 to reciprocate within the pump body 31. The rotation period of the motor shaft 13 is equal to the reciprocating motion of the plunger 31. The cycle, that is, the plunger 31 reciprocates once every 1 revolution of the motor shaft 13, that is, the time required for each revolution of the motor is equal to the time required for each reciprocation of the plunger. In this embodiment, the motor shaft 13 is directly connected to the transmission shaft of the eccentric mechanism 37 to realize the rotational transmission of the motor shaft and the transmission shaft. Preferably, the motor shaft 13 has an interference fit with the drive shaft, and the drive shaft includes a mounting hole for inserting the motor shaft, so that the motor shaft is interference-mounted in the mounting hole. In one embodiment, the motor shaft 13 and the drive shaft of the eccentric mechanism 37 are coupled by a coupling. In one embodiment, the drive shaft is non-rotatably coupled to the motor shaft 13, and the drive shaft includes a mounting hole for insertion of the motor shaft. Specifically, the end of the motor shaft 13 is square or flat, and the mounting hole is a hole that can be engaged with a square or flat square hole, and is non-rotatably mounted in the mounting hole. In another embodiment, the motor shaft 13 includes The spline is provided with a mounting hole matched with the spline, and the spline of the motor shaft is inserted into the mounting hole to make the motor motor shaft and the transmission shaft circumferentially non-rotatably connected.

In the present embodiment, at the side portion in the longitudinal direction of the vertical plunger 35, the plunger 35 is provided with a connecting portion to which the eccentric mechanism is attached, and the eccentric mechanism is connected to the plunger 35 through the connecting portion, and the connecting portion is located substantially in the extending direction of the length of the plunger 35. centre position. Specifically, the connecting portion is a concave cavity that is recessed inward, and the connecting portion is located at an intermediate position of the plunger 45.

The eccentric mechanism further includes a connecting bearing 371 sleeved on the eccentric shaft. The connecting bearing 371 is disposed in the cavity, directly connected to the plunger, and drives the plunger to reciprocate under the driving of the motor 10. Preferably, the connecting bearing 371 is in an interference connection with the eccentric shaft 372.

It can be understood that in another embodiment, the transmission mechanism can also be a crank linkage mechanism, and the crank linkage mechanism is directly connected to the low rotation speed motor, and drives the plunger to reciprocate in the receiving cavity of the pump body 10, so as to pass The crank-link mechanism converts the rotary motion of the low-speed motor into a reciprocating motion of the plunger in the pump body, thereby compressing the water in the pump body by the reciprocating motion of the plunger, thereby increasing the pressure of the water in the pump body.

In one embodiment, the electric machine 10 is specifically an inner rotor motor.

In the present embodiment, the number of plungers in the water pump 30 is one to reduce the volume of the water pump 30, thereby reducing the overall volume of the hand-held high pressure cleaner 100.

In one embodiment, the handheld high pressure cleaner 100 further includes a control unit and a control switch. The control unit is coupled to the motor 10 to control the motor. The control switch is disposed on the housing 102 and electrically connected to the control unit. The operator operates the switch trigger 105. The trigger control switch thus controls the operating state of the motor 10. The working state of the motor 10 includes working, stopping, and the like.

In one embodiment, the water pump 30 further includes an inlet line 32 and a water outlet line 34 that communicate with the high pressure chamber, the inlet line being disposed between the inlet end 106 and the pump body, and the external water source flowing from the inlet end 106. After passing through the water inlet pipe 32, it is pressurized into the high pressure chamber, so that the pressurized water flow is discharged from the water outlet passage 34. The hand-held high-pressure cleaner 100 further includes a nozzle (not shown) that communicates with the water outlet passage 34 to output high-pressure washing water to clean the stain.

In one embodiment, the pump body is provided with a water inlet and a liquid outlet which are both connected to the high pressure chamber, the water inlet is connected with the water inlet passage, the liquid outlet is connected with the water outlet, and the opening direction of the water inlet and the outlet is The same, and both are parallel to the motor axis direction, the opening direction of the liquid outlet is identical to the water outlet pipe 34. When the water pump 30 is working, firstly, the water inlet check valve is opened to open the water into the high pressure chamber, and then the plunger 35 reciprocates to compress the water in the high pressure chamber to pressurize and then open the water outlet check valve to output high pressure washing water.

As shown in FIG. 3, the hand-held high-pressure cleaner 200 in the second embodiment of the present invention includes a housing 202 and functional components both disposed in the housing, the functional components including a motor 210 and a water pump 230, a motor 210 and a water pump 230. Directly connecting, thus eliminating the intermediate mechanism (such as a reduction gearbox), reducing the overall volume of the handheld high-pressure cleaner 200, and the water pump 230 includes a pump body 231 having a receiving cavity and a plunger 235 disposed in the receiving cavity, the motor 210 The drive plunger 235 reciprocates within the receiving chamber to generate a high pressure water flow. The outer casing 202 includes a handle 201 for gripping and a main body portion 208 disposed at an angle to the handle 201. The outer casing 202 is further provided with a liquid inlet end 206 configured to be connected to an external water pipe and a liquid outlet port 204 for discharging the cleaning liquid. The motor 210 and the water pump 230 are disposed in the main body portion 208, and the liquid outlet 204 is disposed at the front end of the main body portion 208. The hand-held high-pressure cleaner 200 further includes a switch trigger 205 disposed near the handle for controlling liquid circulation. The switching of the track and/or circuit is disposed on the outer casing 202, and the switch trigger 205 can be simultaneously controlled by the same hand when the operator holds the handle 201 with one hand.

The hand-held high-pressure cleaner 200 in this embodiment differs from the hand-held high-pressure cleaner 100 in the above embodiment only in the specific structure and connection relationship of the motor 210. Only the differences are specifically described below, for the same structure and Features, do not repeat them here.

In this embodiment, the motor 210 is an outer rotor motor, including a stator coil fixedly disposed, an outer rotor 211 surrounding the stator coil, and a motor shaft 213 fixedly coupled to the outer rotor, the outer rotor including a plurality of relative rotors The stator coil is circumferentially arranged with permanent magnets. During operation of the outer rotor motor, the outer rotor 210 drives the motor shaft 213 to rotate.

The outer rotor motor has the characteristics of small volume, low rotation speed and large torque, which can provide large torque at low speed and meet the driving requirements of the pump. Therefore, the power density of the outer rotor motor is large, which is lower than that of the inner rotor directly. The speed motor uses an external rotor motor to further reduce the weight and volume of the hand-held high-pressure cleaner and improve portability.

Specifically, the rotational speed of the outer rotor motor ranges from 2000 r/min to 4000 r/min. In a preferred embodiment, the rotational speed of the outer rotor motor ranges from 2000 r/min to 3500 r/min. In another preferred embodiment, The motor speed is as low as 2000r/min-3000r/min.

The functional component further includes a transmission mechanism directly connected between the motor 210 and the plunger 235 for converting the rotational motion of the motor 210 into the reciprocating motion of the plunger 235, and the transmission mechanism in the water pump 230 is directly connected to the motor 210. The rotary motion of the motor is converted to drive the plunger to reciprocate in the receiving cavity of the pump body to compress the water flow. In this embodiment, the motor and the water pump and the transmission mechanism constitute the functional components of the high pressure cleaner.

Further, the transmission mechanism is an eccentric mechanism 237, and the eccentric mechanism 237 is directly connected to the outer rotor motor, and drives the plunger to reciprocate in the receiving cavity of the pump body, so that the rotary motion of the outer rotor motor is converted into a plunger by the eccentric mechanism 237. The reciprocating motion of the pump body 35, in turn, compresses the water in the water pump by the reciprocating motion of the plunger 35, thereby increasing the pressure of the water in the water pump.

Referring to FIG. 3, the length extension direction of the plunger 235 and the length extension direction of the motor shaft 213 are perpendicular to each other, and the distance L between the end of the outer rotor motor away from the end of the plunger 235 and the center line of the plunger is 70mm-150mm, preferably 100mm, 110mm, 120mm. The motor and the water pump and the transmission mechanism constitute a functional component of the high pressure cleaner, the length of the functional component in the axial direction of the motor being in the range of 100 mm to 180 mm, preferably 120 mm, 150 mm. That is, the distance from the rear end of the outer rotor motor to the front end of the water pump in the direction of the motor shaft 213 is in the range of 100 mm to 180 mm. Because the outer rotor motor of the same power is small in size and light in weight, the outer rotor motor is directly connected by the pump and the motor, eliminating the speed reduction mechanism, effectively reducing the intermediate parts, directly shortening the distance between the motor and the water pump, and making the machine more Compact and high transmission efficiency, the use of a smaller outer rotor motor ensures minimum size and improved portability of the holding high pressure cleaner.

Due to the higher efficiency of the outer rotor motor, the energy conversion rate can be further improved, and the continuous working time of the single-charged battery pack can be improved. In this embodiment, the handheld high-pressure cleaner further includes a battery pack for supplying energy to the motor, the battery pack voltage is 18V-20V, the capacity is 2Ah-6Ah, and the outlet pressure of the handheld high-pressure cleaner is 2MPa-3MPa, The flow rate is 120L/h-200L/h, and the battery pack has a continuous working time of 8min-40min.

Preferably, the battery pack voltage is 18V-20V, the capacity is 2Ah-4Ah, the outlet pressure of the handheld high pressure cleaner is 2MPa-3MPa, the flow rate is 150L/h-200L/h, and the continuous working time of the battery pack is 8min-30min. Preferably, the battery pack voltage is 18V-20V, the capacity is 2Ah-3.5Ah, the outlet pressure of the handheld high pressure cleaner is 2MPa-3MPa, the flow rate is 150L/h-200L/h, and the continuous working time of the battery pack It is 8min-25min.

In another preferred embodiment, the voltage of the battery pack is 36V-40V, and the capacity is 2.5Ah-9Ah. When the pressure of the hand-held high pressure cleaner is 2MPa-5MPa, the flow rate is 200L/h-280L/h. The battery pack has a continuous working time of 7min-50min. Preferably, the voltage of the battery pack is 36V-40V, the capacity is 2.5Ah-5Ah, when the pressure of the hand-held high pressure cleaner is 2MPa-5MPa, the flow rate is 200L/h-280L/h, the continuous working time of the battery pack It is 7min-30min. Preferably, the voltage of the battery pack is 36V-40V, the capacity is 2.5Ah-4Ah, when the pressure of the hand-held high pressure cleaner is 2MPa-5MPa, the flow rate is 200L/h-280L/h, the continuous working time of the battery pack It is 7min-23min.

In another preferred embodiment, the hand-held high-pressure cleaner further includes a battery pack for supplying energy to the motor. The battery pack has a voltage of 50V-60V and a capacity of 4Ah-9Ah. When the pressure of the hand-held high-pressure cleaner is 3MPa-5MPa, flow rate is 200L/h-280L/h, and the battery pack has a working time of 12min-60min.

In another preferred embodiment, the capacity of the battery pack is 2Ah-2.5Ah, when the discharge pressure of the handheld high-pressure cleaner is 2MPa-2.5MPa, the flow rate is 150-200L/h, and the continuous working time of the battery pack is 10min-22min. The capacity of the battery pack is 4Ah-5Ah, the discharge pressure of the handheld high pressure cleaner is 3MPa-5MPa, the flow rate is 200L/h-250L/h, and the continuous working time of the battery pack is 6min-23min.

In one embodiment, the plunger has a diameter ranging from 10 mm to 14 mm and the plunger has a stroke range of 3 mm to 6 mm. The diameter and formation of the plunger determines the volume that is emptied by the single reciprocating motion of the plunger and is directly related to the flow of cleaning liquid that is expelled. Under the premise that the motor speed is basically determined, the diameter of the plunger is preferably 10mm-14mm, the stroke is 3mm-6mm, and the running efficiency of the pump is high.

In one embodiment, referring to FIG. 4, this embodiment is basically the same as the second embodiment except that the connection structure of the outer rotor motor and the eccentric mechanism is different. In this embodiment, the outer rotor motor 310 includes a stator coil fixedly disposed, an outer rotor 311 surrounding the stator coil, and a motor shaft 313 fixedly coupled to the outer rotor, the outer rotor 311 including a plurality of opposite A permanent magnet of a stator coil circumferentially arranged. The eccentric mechanism 337 includes a transmission shaft. The transmission shaft is provided with a groove matching the motor shaft, and the motor shaft is inserted into the groove to make the motor motor shaft and the transmission shaft circumferentially non-rotately connected. Specifically, the motor shaft passes through the spline and the transmission shaft. In cooperation, or the motor shaft is inserted into the groove through an interference connection, of course, the drive shaft can be connected to the motor shaft through a coupling to realize the rotation transmission.

In one embodiment, referring to FIG. 5, the outer rotor motor 410 includes a stator coil fixedly disposed and an outer rotor 411 surrounding the stator coil. The outer rotor 411 includes a plurality of circumferentially disposed relative to the stator coil. magnet. The eccentric mechanism 437 includes a drive shaft, and the outer rotor is integrally formed with the eccentric mechanism.

In another embodiment, referring to FIG. 6, the motor 510 is a reciprocating output motor, and the reciprocating output motor is directly connected to the water pump 530, so that the compression component in the water pump 530 can reciprocate to compress the water, increase the pressure of the water, and finally pass. The outlet end outputs high-pressure washing water for cleaning cars, doors and windows, and the like. Moreover, the reduction gear box between the motor 510 and the water pump 530 is omitted, which reduces the overall volume of the hand-held high pressure cleaner and is convenient to use.

Further, the reciprocating output motor 510 is directly connected to the plunger 530 and drives the plunger 530 to reciprocate in the pump body to realize the pressurized output of the water flow, and the water pump 530 only needs to be provided with the plunger 535 to drive the motor through the reciprocating output. The reciprocating motion in the body does not require the conversion of the eccentric mechanism of the rotary motion or the crank-link mechanism, which simplifies the mechanism of the water pump, thereby further reducing the overall volume of the hand-held high-pressure cleaner.

Specifically, one end of the plunger 535 is provided with a connecting portion at one end of the plunger, and the motor shaft of the reciprocating output motor is connected to the connecting portion, so that the plunger 535 and the reciprocating output motor are directly connected through the connecting portion.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A hand-held high pressure cleaner characterized in that it comprises:

The outer casing includes a handle for holding and a main body portion disposed at an angle with the handle, and one end of the main body portion is provided with a liquid outlet for discharging liquid;

a switch disposed on the outer casing for controlling the on and off of the liquid flow channel and/or the circuit;

The functional component includes a motor and a water pump housed in the outer casing, and the motor is directly connected to the water pump, the water pump includes a pump body and a plunger disposed in the pump body, and the number of the plungers is only In one case, the motor includes a motor shaft that drives the plunger to reciprocate within the pump body, the period of rotation of the motor shaft being equal to the period of reciprocation of the plunger.
A hand-held high-pressure cleaner according to claim 1, wherein said motor is an outer rotor motor, said outer rotor motor comprising a stator coil fixedly disposed, an outer rotor surrounding said stator coil, said outer rotor A plurality of permanent magnets circumferentially disposed relative to the stator coil are included.
A hand-held high-pressure cleaner according to claim 2, wherein said functional component further comprises a transmission mechanism coupled between said motor shaft and said plunger, said outer rotor motor passing said transmission mechanism The rotational motion of the motor shaft is converted into a reciprocating motion of the plunger.
The hand-held high-pressure cleaner according to claim 2, wherein a length extending direction of the plunger is perpendicular to an extending direction of the motor shaft, and the outer rotor is in an extending direction of the motor shaft The axial distance between the end of the motor remote from the plunger and the centerline of the plunger ranges from 70 mm to 150 mm.
The hand-held high-pressure cleaner according to claim 2, wherein said hand-held high-pressure cleaner further comprises a battery pack for supplying energy to said outer rotor motor, said battery pack voltage being 18V-20V, and having a capacity of 2Ah-6Ah, when the outlet pressure of the hand-held high-pressure cleaner is 2MPa-3MPa, the flow rate is 120L/h-200L/h, and the continuous working time of the battery pack is 8min-40min.
The hand-held high-pressure cleaner according to claim 2, wherein said hand-held high-pressure cleaner further comprises a battery pack for supplying energy to said outer rotor motor, said battery pack having a voltage of 36-40V, capacity It is 2.5Ah-9Ah, when the outlet pressure of the hand-held high-pressure cleaner is 2MPa-5MPa, the flow rate is 200L/h-280L/h, and the continuous working time of the battery pack is 7min-50min.
The hand-held high-pressure cleaner according to claim 2, wherein said hand-held high-pressure cleaner further comprises a battery pack for supplying energy to said outer rotor motor, said battery pack having a voltage of 50V-60V, capacity It is 4Ah-9Ah. When the outlet pressure of the hand-held high-pressure cleaner is 3MPa-5MPa, the flow rate is 200L/h-280L/h, the continuous working time of the battery pack is 12min-60min.
A hand-held high pressure cleaner according to claim 2, wherein said plunger has a diameter ranging from 10 mm to 14 mm and said plunger has a stroke range of from 3 mm to 6 mm.
The hand-held high-pressure cleaner according to claim 2, wherein the outer rotor motor has a rotational speed ranging from 2000 r/min to 4000 r/min.
A hand-held high-pressure cleaner according to claim 2, wherein said liquid outlet, said water pump and said outer rotor motor are arranged in order from front to back in said outer casing.
A hand-held high-pressure cleaner according to claim 3, wherein said transmission mechanism is an eccentric mechanism, and said eccentric mechanism is coupled between said motor shaft and said plunger.
A hand-held high-pressure cleaner according to claim 11, wherein said eccentric mechanism includes a transmission shaft coupled to said motor shaft and an eccentric shaft eccentrically disposed with said transmission shaft, said transmission shaft and said transmission shaft Motor shaft interference connection.
A hand-held high-pressure cleaner according to claim 12, wherein said plunger is provided with a connecting portion for connecting said eccentric mechanism, said connecting portion being located substantially at an intermediate position of said plunger length extending direction, The eccentric mechanism drives the plunger to perform the reciprocating motion, the connecting portion is a cavity formed by the plunger recessed inward, and the eccentric mechanism further comprises a connecting bearing sleeved on the eccentric shaft, The connecting bearing is disposed in the cavity and is in interference connection with the eccentric shaft.
A hand-held high-pressure cleaner according to claim 1, wherein said water pump further comprises a water inlet passage and a water outlet passage provided through said pump body, and a first pump cover and a first portion disposed at both ends of said pump body a second pump cover, the water pump further comprising a first high pressure chamber formed in the first pump cover and a second high pressure chamber formed in the second pump cover, the two ends of the plunger respectively extending into the first a high pressure chamber and the second high pressure chamber, and driven to reciprocate within the receiving chamber to alternately compress or release the first high pressure chamber or the second high pressure chamber, the The water passage is in communication with the first high pressure chamber and the second high pressure chamber, and the water outlet passage is in communication with the first high pressure chamber and the second high pressure chamber, respectively.
The hand-held high-pressure cleaner according to claim 1, wherein the motor is a reciprocating output motor, and the reciprocating output motor is directly connected to the plunger and drives the plunger to reciprocate in the receiving cavity. motion.
A hand-held high-pressure cleaner according to claim 15, wherein one end of the length direction of the plunger is provided with a connecting portion, and a motor shaft of the reciprocating output motor is connected to the connecting portion, The pump further includes a pump cover, a high pressure chamber is formed between the pump cover and the pump body, and the other end of the plunger extends into the high pressure chamber and is driven by the reciprocating output motor at the high voltage Reciprocating motion in the chamber.