JP2013169490A - High pressure washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high pressure washing device which can suppress waste of an electric power and waste of a cleaning liquid.SOLUTION: A high pressure washing device 1 can perform high pressure ejection of a cleaning liquid from a nozzle 3 and pulsates an ejection pressure of the cleaning liquid from the nozzle 3 at a variation rate of 20% or more.

Description

  The present invention relates to a high-pressure cleaning apparatus.

  Conventionally, as a high-pressure washing device for washing concrete and tile outer walls and cars, etc., it is equipped with a pump driven by power supplied from a commercial power supply, and water (cleaning liquid) supplied from a water tap or the like (water source) A stationary type is often used which is compressed by the pump and discharged. The pump employs a three-plunger system including three reciprocating members (plungers).

JP 2005-313008 A

  However, since the cleaning liquid is discharged in a state where there is almost no pulsation in the 3-plunger system, waste of electric power and waste of the cleaning liquid occur.

  Therefore, an object of the present invention is to provide a high-pressure cleaning apparatus that can suppress waste of electric power and waste of cleaning liquid.

  In order to solve the above-mentioned problems, the present invention is a high-pressure cleaning apparatus that has a nozzle and discharges a cleaning liquid at a high pressure from the nozzle, and pulsates the discharge pressure at a variation rate of 20% or more. A cleaning device is provided.

  According to such a configuration, it is possible to perform cleaning at a high pressure while suppressing power consumption and cleaning liquid consumption.

  The discharge pressure preferably pulsates with a maximum value of 3 MPa or more and a minimum value of 2.4 MPa or less.

  According to such a configuration, it is possible to suppress power consumption and cleaning liquid consumption while maintaining a high discharge pressure.

  Moreover, it is preferable that the 2nd area | region where the said discharge pressure becomes smaller than it is about 3 times or more with respect to the 1st area | region where the said discharge pressure becomes 2.4 MPa or more.

  According to such a configuration, it is possible to suppress power consumption and cleaning liquid consumption while maintaining a high discharge pressure.

  The discharge pressure is preferably pulsated by using a reciprocating pump driven by a motor and including a single reciprocating member.

  According to such a structure, it can be made to pulsate with a simple structure, and the consumption of electric power and cleaning liquid can be suppressed.

  The motor is preferably supplied with power from a battery capable of outputting 200 W or more.

  According to such a configuration, since a high discharge pressure can be obtained with the battery, the working range is not restricted.

  Moreover, it is preferable that the said battery is for electric tools.

  According to such a configuration, versatility is high, and an existing battery can be used.

  The battery preferably has a weight of 2 kg or less.

  According to such a structure, it is easy to carry and can improve transportability.

  According to the high-pressure cleaning apparatus of the present invention, high-pressure cleaning is possible while suppressing waste of power and cleaning liquid.

1 is an overall view of a high-pressure cleaning device according to a first embodiment of the present invention. Sectional drawing of the high-pressure washing apparatus by the 1st Embodiment of this invention. Sectional drawing which shows the state which the cover part of the high-pressure washing apparatus by the 1st Embodiment of this invention opened. The figure explaining engagement with the upper housing and tank by the 1st Embodiment of this invention. The figure explaining engagement with the upper housing and tank by the 1st Embodiment of this invention. Sectional drawing of the lower housing by the 1st Embodiment of this invention. The figure explaining attachment and detachment of the battery pack with respect to the battery chamber by the 1st Embodiment of this invention. The figure which shows the state which the plunger by the 1st Embodiment of this invention is located in a bottom dead center. The figure which shows the state which the plunger by the 1st Embodiment of this invention is located in a top dead center. The figure which shows the discharge waveform of the washing | cleaning liquid by the conventional 3 plunger system. The figure which shows the theoretical discharge waveform of the washing | cleaning liquid by the 1 plunger system by the 1st Embodiment of this invention. The figure which shows the actual discharge waveform of the washing | cleaning liquid by the 1 plunger system by the 1st Embodiment of this invention. The whole high pressure washing device by a 2nd embodiment of the present invention. The figure which shows the state which removed the tank by the 2nd Embodiment of this invention from the housing. The figure which shows the state which the housing and tank by the 2nd Embodiment of this invention are engaging. The figure which shows the state by which the housing and tank by the 2nd Embodiment of this invention were isolate | separated. Sectional drawing of the high-pressure washing apparatus by the 2nd Embodiment of this invention. The figure which shows engagement with the battery cover and battery chamber by the 2nd Embodiment of this invention. The figure explaining mounting | wearing to the battery chamber of the battery pack by the 2nd Embodiment of this invention. Sectional drawing of the battery pack by the 2nd Embodiment of this invention. The figure explaining mounting | wearing to the battery chamber of the battery pack by the 2nd Embodiment of this invention. The whole high pressure washing device by a 3rd embodiment of the present invention. Sectional drawing of the high-pressure washing apparatus by the 3rd Embodiment of this invention. The whole high pressure washing device by a 3rd embodiment of the present invention. Sectional drawing of the high-pressure washing apparatus by the 3rd Embodiment of this invention. The whole high pressure washing device by a 4th embodiment of the present invention. The figure explaining mounting | wearing to the high-pressure washing apparatus of the adapter by the 4th Embodiment of this invention. The figure explaining mounting | wearing to the high-pressure washing apparatus of the adapter by the 4th Embodiment of this invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. The figure explaining one modification of the high-pressure washing apparatus of the present invention. Sectional drawing of the tank by the 1st Embodiment of this invention. The figure which shows the state which mounted | wore the high pressure washing | cleaning apparatus with the tank of FIG. The figure which shows the principal part of a high pressure washing apparatus. The figure which shows the relationship between the power conversion efficiency from a motor to a pump, and a motor output. The figure which shows the relationship between the power conversion efficiency from a battery pack to a motor, and a battery pack output.

  A high-pressure cleaning apparatus 1 according to a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the high-pressure cleaning apparatus 1 is configured to be connectable to a gun 3 for discharging cleaning liquid via a high-pressure hose 2. The gun 3 has a switch operated by an operator, and the cleaning liquid is discharged from the nozzle 31 by operating the switch.

  As shown in FIGS. 1 and 2, the high-pressure washing apparatus 1 includes an upper housing 4 and a lower housing 5, and a tank 6 that is a container is accommodated in the upper housing 4. Here, as will be described later, the lower housing 5 contains the motor 562, the pump 576, and the battery pack 7, and the drive part of the high-pressure washing apparatus 1 is housed. Sometimes called. In addition, since the tank 6 is accommodated in the upper housing 4, it is not directly impacted from the outside, and damage to the tank 6 can be suppressed.

  The upper housing 4 includes a main body 41, a lid portion 42, an upper latch 43, a pair of lower latches 44, and a pressing portion 45 that serves as a connection portion between the tank 6. Note that the pressing portion 45 may be provided in the lower housing 5.

  That is, in the high-pressure washing apparatus 1 of the present embodiment, the lid part 42, the main body 41, and the lower housing 5 (drive part) are arranged in order from the top. Since the tank 6 for storing the cleaning liquid is stored in the main body 41, the main body 41 functions as a tank storage portion. By adopting such a configuration, the tank 6 is protected by the tank housing portion 41 when the high-pressure washing apparatus 1 falls and falls, so that the tank 6 can be prevented from being damaged. Further, even if the connecting portion between the tank 6 and the driving portion (a pressing portion 45 to be described later serving as a water supply port from the tank 6) is damaged due to overturning or the like, the cleaning liquid leaks out of the tank housing portion 41. Can be prevented. Therefore, it is possible to prevent the cleaning liquid from entering the drive unit. Moreover, since the tank 6 can be accommodated and used, it is not necessary to supply the cleaning liquid from the water supply by a water supply hose or the like. As a result, there is no restriction on the place of use, and a wide range of use is possible.

  The lid portion 42 can be opened and closed by releasing the upper latch 43. As shown in FIG. 3, the lid portion 42 is opened around the support shaft 43a, so that the main body 41 of the tank 6 can be opened. Detachable. Moreover, the upper housing 4 and the lower housing 5 can be separated by releasing the pair of lower latches 44. The lid portion 42 is integrally provided with a handle 42a for an operator to hold.

  That is, since the lid portion 42 is connected to the tank housing portion 41 so as to be openable and closable, if the lid portion 42 closes the opening portion of the tank housing portion 41, the lid 42 can be easily carried with the handle 42a. If it opens, the tank 6 can be taken out from the tank accommodating part 41. Further, if the lid portion 42 is closed with the tank 6 taken out, dust and the like can be prevented from entering the tank housing portion 41, and the water supply port for the cleaning liquid can be prevented from being clogged. Moreover, when connecting a water supply hose, since a hose connection location is protected by the tank accommodating part 41, it can suppress that a connection disconnects by external force.

  Moreover, since the upper housing 4 (tank accommodating part 41) and the lower housing 5 (drive part) are comprised so that attachment or detachment is possible, it was accommodated in the tank accommodating part 41 by isolate | separating the lower housing 5 from the upper housing 4. FIG. It is also possible to connect to a larger tank other than the tank 6, and various tanks can be used according to the work application.

  As shown in FIGS. 2 and 3, the pressing portion 45 extends in the vertical direction, and an inflow port 451 extending in the vertical direction is formed therein. Further, an O-ring 45 ′ serving as a seal member is provided on the outer periphery of the pressing portion 45. Note that the O-ring 45 ′ may be provided not on the outer periphery of the pressing portion 45 but on the inner periphery of the fitting portion 65 described later.

  An opening 68 is formed in the tank 6, and an adapter (lid) 67 that covers the opening 68 is attached to a screw portion 66 provided on the outer periphery of the opening 68, thereby closing the opening 68. In the tank 6, a bottom surface 6 </ b> A is defined on the side opposite to the side where the opening 68 is formed (upper side in FIG. 2) in the vertical direction. An intake valve 6 a (FIG. 37) is provided on the bottom surface 6 </ b> A of the tank 6. The detailed configuration of the intake valve 6a will be described later. The tank 6 contains a cleaning liquid, and the adapter 67 of the tank 6 includes a connecting portion 61 as shown in FIGS. Outlet 62, pressed portion 63, outflow prevention valve 64, and fitting portion 65 are formed in connection portion 61. When water is poured into the tank 6, the adapter 67 (threaded portion 67a) is removed from the tank 6 (screw portion 66), and the opening 68 of the tank 6 is directed upward from a water supply or the like. The connecting portion 61 corresponds to a container side engaging portion and a device side engaging portion, and in particular, the fitting portion 65 corresponds to a device side engaging portion and the threaded portion 67a corresponds to a container side engaging portion.

  The outflow port 62 extends in the up-down direction, and the pressed portion 63 is disposed in the outflow port 62 with a spring biased downward so as to be movable in the up-down direction. The outflow prevention valve 64 is provided at the upper end of the pressed portion 63 so as to close the outflow port 62. The fitting portion 65 has a cylindrical shape, and is arranged on the lower side of the outlet 62 so as to be coaxial with the outlet 62. As shown in FIGS. 3 and 4, when the tank 6 is not mounted in the upper housing 4, the outflow port 62 is blocked by the outflow prevention valve 64. Thereby, the cleaning liquid in the tank 6 is prevented from leaking from the outlet 62.

  When the tank 6 is mounted in the upper housing 4, as shown in FIG. 4, first, an adapter 67 is provided inside the main body 41 and is a receiving portion 46 having substantially the same shape as the adapter 67 of the tank 6. And the pressing portion 45 is inserted into the fitting portion 65. Then, as shown in FIG. 5, the pressed portion 45 presses the pressed portion 63 against the urging force of the spring, so that the outflow prevention valve 64 is also pressed upward. As a result, the outflow port 62 is released, and the cleaning liquid in the tank 6 can flow into the lower housing 5 through the inflow port 451. Since the O-ring 45 ′ provided on the outer peripheral surface of the pressing portion 45 contacts the inner peripheral surface of the fitting portion 65, the cleaning liquid does not leak into the upper housing 4.

  The diameter of the outflow port 62 and the inflow port 451 is substantially the same, and the outflow port 62 and the inflow port 451 are coaxially connected when the pressed portion 63 and the pressing portion 45 come into contact with each other. The cleaning liquid stably flows into the inlet 451. If the tip of the outlet 62 has a smaller diameter than the tip of the inlet 451 and the tip of the outlet 62 enters the inlet 451, the cleaning liquid can flow into the inlet 451 more reliably.

  When the tank 6 is mounted on the upper housing 4, the dimension of the outer peripheral surface of the tank 6 is substantially the same as the dimension of the inner peripheral part of the main body 41. Is held by the inner wall of the housing 4, and the tank 6 is stably accommodated in the upper housing 4. Further, in the vertical direction of the tank 6, the lower surface of the adapter 67 of the tank 6 (the lower portion in FIG. 2) contacts the bottom surface of the receiving portion 46, and the bottom surface 6 </ b> A of the tank 6 contacts the lid portion 42. Is sandwiched between the receiving portion 46 and the lid portion 42. As a result, the vertical direction is also stably maintained. If an elastic material is provided between the tank 6 and the inner peripheral portion of the upper housing 4, it is possible to further absorb external impacts and prevent damage to the tank 6 due to external impacts.

  Further, when the high-pressure cleaning apparatus 1 is used, the inside of the tank 6 becomes negative pressure by discharging the cleaning liquid from the tank 6. When the pressure in the tank 6 becomes negative, there is a possibility that water cannot be supplied to a pump 576 described later, or that the tank 6 may be crushed. Therefore, as shown in FIGS. 37 and 38, an intake valve 6a serving as an intake member is provided on the bottom surface of the tank 6. The intake valve 6a is composed of a valve 6b and a spring 6c, and is formed in the tank 6a to close the intake port 6d so as to be opened and closed.

  In the state of FIG. 37 with the tank 6 removed from the main body 41, the valve 6b is urged outward (downward in FIG. 37) by the spring 6c and closes the intake port 6d. Accordingly, when water is supplied to the tank 6, the intake port 6d portion (tank bottom surface) is on the lower side, but since the intake port 6d is blocked by the valve 6b, the cleaning liquid does not leak.

  On the other hand, in the state of FIG. 38 in which the tank 6 is mounted on the main body 41 and the lid 42 is closed, the intake port 6d portion is located on the upper side. Since one end (rod portion) of the valve 6b protrudes outward from the bottom surface of the tank 6, when the lid 42 is closed, the lid 42 pushes down the rod portion and the valve 6b opens against the biasing force of the spring, and the intake port 6d Is released. Therefore, since air can be smoothly drawn into the tank 6, water supply to the pump 576 can be stabilized. Note that the valve 6b may not be opened by the lid 42, and the valve 6b may be automatically opened when the cleaning liquid is discharged and the pressure in the tank 6 decreases.

  Further, the location of the intake port 6d and the intake valve 6a need not be the bottom surface of the tank 6, but may be a side surface. When provided on the side, the valve can be automatically opened when the tank 6 is attached to the main body 41.

  In the present embodiment, a connecting portion 61 connected to the pressing portion 45 is provided in an adapter (lid) 67 connected to the opening 68 of the tank 6, and a portion of the tank 6 where the adapter 67 is not provided (tank 6, the intake valve 6 a is provided on the bottom surface 6 </ b> A), but the connecting portion 61 may be provided directly on the tank 6 instead of the adapter 67, and the intake valve 6 a may be provided on the adapter 67. Further, the connecting portion 61 and the intake valve 6 a may be provided directly on different surfaces of the tank 6. In this case, since it is necessary to provide the opening 68 separately, it is preferable to provide one of the connection portion 61 and the intake valve 6 a in the adapter 67.

  As shown in FIG. 1, the lower housing 5 includes a hose connection port 51 to which the high-pressure hose 2 is connected, a start switch 52 for starting high-pressure cleaning work, and a battery cover 53 that can be opened and closed. . The battery cover 53 includes a lock mechanism that maintains a closed state with respect to the lower housing. The start switch 52 is a dial type, and when the dial is turned, the high-pressure washing apparatus 1 can be switched from the stopped state to the driven state. Further, the discharge amount of the cleaning liquid may be changed according to the operation amount of the dial.

  As shown in FIG. 6, the lower housing 5 is partitioned into a battery chamber 55, a motor chamber 56, and a pump chamber 57 by a partition plate 54.

  A battery pack 7 (battery) is disposed in the battery chamber 55. The battery pack 7 can be attached to an electric tool such as an impact driver, and houses a rechargeable storage battery. In the present embodiment, four lithium ion batteries having a rated voltage of 3.6 V and a capacity of 1.5 Ah are connected in series and two in parallel, and a total of eight lithium ion batteries are accommodated in the battery pack 7. The battery pack 7 has a capacity of 4 V and a capacity of 3.0 Ah. As shown in FIG. 7, the battery pack 7 can be attached to and detached from the lower housing 5 by opening the battery cover 53. The battery pack 7 may be attached to the lower housing 5 (battery chamber 55) by a later-described latch portion 7B (FIG. 20) that is used when the battery pack 7 is attached to the power tool. The pack 7 may be configured to fit, and the battery pack 7 only needs to be fixed in the battery chamber 55. The battery may be a nickel metal hydride battery or a nickel cadmium battery instead of a lithium battery.

  As shown in FIGS. 2 and 6, the battery chamber 55 is provided with an electrode 551 that contacts an electrode terminal (not shown) of the battery pack 7. The battery pack 7 for the electric tool is provided with a pair of rails. The battery pack 7 is engaged with the rail receiving portion provided in the battery chamber 55 from the state shown in FIG. , The electrode terminal of the battery pack 7 and the electrode 551 are engaged and electrically connected. When the latch part of the battery pack 7 is engaged with the latch receiving part of the battery chamber 55 in a state where the electrodes are engaged with each other, the battery pack 7 can be prevented from being detached from the battery chamber 55.

  A control circuit 561 and a motor 562 are accommodated in the motor chamber 56. The motor 562 includes an output shaft 562a and a spindle 562b connected to the output shaft 562a.

  As shown in FIG. 2, the control circuit 561 is connected to the electrode 551 in the battery chamber 55 and the motor 562 in the motor chamber 56, and receives power supply from the battery pack 7 to control driving of the motor 562. . Although not shown, the control circuit 561 is connected to a start switch 52 provided in the lower housing 5, and when the start switch 52 is connected (when turned on), the drive control of the motor 562 is controlled. To start. A start switch 52 is provided in the current path between the battery pack 7 and the motor 562. When the start switch 52 is turned on, the current path becomes a closed circuit, and power supply from the battery pack 7 to the motor 562 is started. In addition, a switching element is provided in the current path, and the switching element is controlled according to the operation amount of the start switch 52. For example, the rotation of the motor 562 is changed by switching the on / off duty ratio, the discharge amount of the cleaning liquid, and the like. May be changed.

  As shown in FIG. 2, the motor 562 is connected to the electrode 551 of the battery chamber 55, and is driven by receiving power supply from the battery pack 7. The motor 562 is a DC motor that is driven by DC power from the battery pack 7. As the DC motor, various motors such as a motor with a brush and a brushless motor can be applied. Further, an AC motor may be used instead of a DC motor. In this case, the control circuit 561 includes an inverter circuit that converts DC power from the battery pack 7 into AC power.

  As shown in FIG. 8, in the pump chamber 57, a suction port 571 connected to the inlet 451 of the upper housing 4, a discharge port 572 connected to the hose connection port 51 of the lower housing 5, and a suction port 571. And a compression chamber 573 disposed between the discharge port 572 and the discharge port 572. Further, in order to prevent the cleaning liquid supplied from the tank 6 from flowing backward from the discharge port 572 to the suction port 571, between the compression chamber 573 and the suction port 571 and between the compression chamber 573 and the discharge port 572. Are provided with a suction side valve 574 and a discharge side valve 575, respectively.

  Each valve 574 and 575 has a built-in spring, and the valve is normally closed by the biasing force of the spring. In addition, the suction side valve 574 includes a valve portion 574A, and the valve portion 574A is opened when moved downward in FIG. The discharge side valve 575 is also provided with a valve portion 575A, and the valve portion 575A is moved to the left in FIG. Further, the valves 574 and 573 are provided with O-rings 574a and 575a which serve as seal members, respectively, so that the cleaning liquid does not leak from the suction port 571 to the compression chamber 573 or from the compression chamber 573 to the discharge port 572. Has been.

  A pump 576 is disposed in the pump chamber 57. The pump 576 is a reciprocating pump, particularly a plunger pump, and has a smaller number of plungers than the conventional three plungers, specifically, a single plunger system (one plunger). Specifically, the pump 576 includes a plunger 576A and a crank 576B that are reciprocating members formed of an aluminum alloy. Further, the pump 576 is in contact with the outer periphery of the plunger 576A to contact the outer periphery of the plunger 576A with a rubber packing 576C serving as a seal member that prevents the cleaning liquid from leaking from the compression chamber 573 to the crank 576B. A metal 576D for improving the mobility, and a grease leakage prevention member 576E serving as a seal member that suppresses leakage of grease that contacts the outer periphery of the plunger 576A and lubricates the crank 576B to the compression chamber 573 side. Yes. Plunger 576A is supported by casing 576F of pump 576.

  In this embodiment, the pump 576 is described as a plunger pump (driven by a plunger 576A), but a piston pump can also be applied. The pump 576 is provided with a seal member 576C on the housing side (the member side that slidably supports the plunger 576A), but the piston pump is a seal member (a member corresponding to the plunger 576A of the plunger pump) on the piston side that is driven. For example, an O-ring is provided to suppress leakage of the cleaning liquid (pressure). That is, any structure that can suppress the leakage of the cleaning liquid (pressure) and can discharge at a high pressure may be used.

  Plunger 576 </ b> A has a substantially cylindrical shape, and one end thereof is connected to crank 576 </ b> B and the other end is arranged to form a part of compression chamber 573.

  As shown in FIGS. 8 and 9, the crank 576B rotates eccentrically by the power from the motor 562, and the plunger 576A reciprocates as the crank 576B rotates. Specifically, as shown in FIG. 8, when the plunger 576A is located at the lowest side (bottom dead center), the cleaning liquid flows into the compression chamber 573 from the suction port 571, and as shown in FIG. When 576A is located on the uppermost side (top dead center), the cleaning liquid flows out from the compression chamber 573 to the discharge port 572. In this way, the cleaning liquid that has flowed into the compression chamber 573 from the suction port 571 is pressurized by the plunger 576A in the compression chamber 573 and discharged from the discharge port 572. A speed reduction mechanism 577 is provided between the motor 562 and the crank 576B.

  As shown in FIGS. 6 and 7, a gear 563 supported by a gear shaft 563 a meshes with a spindle 562 a connected to the motor 562. The rotation shaft 567b of the crank 576B is eccentrically connected to the gear shaft 563a. The spindle 562a and the gear 563 constitute a speed reduction mechanism.

  The motor 562 and the pump 576 are arranged so as to cross each other. As shown in FIGS. 6 and 7, the motor shaft 562a is arranged facing the left-right direction (the pump 576 side) in the figure, and the pump 576 is arranged facing the up-down direction (the motor 562 side) in the figure. . That is, the reciprocating direction of the plunger 576A of the pump 576 is the vertical direction in the figure, and the extension line in the reciprocating direction (axial direction) and the extension line of the motor shaft 562a are arranged so as to intersect substantially orthogonally. Has been. By arranging in this way, a compact configuration can be achieved.

  In the case of the conventional 3-plunger system, the rotation of the motor is transmitted to the plunger. However, since there are three plungers, a rotating swash plate having a constant thickness (a plunger axial direction) is used instead of the crank 576B. The rotating swash plate is arranged so that the inclined surface faces the three plungers and one end thereof is in contact with each other. By rotating the rotating swash plate, the plunger in contact with the thickness portion of the rotating swash plate sequentially It is reciprocated by being pushed out. Accordingly, since the rotary swash plate needs to be provided in the axial direction of the motor, the plunger also needs to be arranged in the extension direction in parallel with the motor shaft. Therefore, the motor and the plunger are arranged in the same direction, and the dimension in the motor shaft direction becomes large. In addition, since three plungers are used, the pump itself is large.

  On the other hand, according to this embodiment, the size of the pump 576 itself can be reduced by using one plunger 576A, and the motor 562 and the pump 576 are arranged so as to be substantially orthogonal (L-shaped). Therefore, the dimension of the drive part in the motor shaft direction can be suppressed. Furthermore, by arranging the battery pack 7 in the space formed by the motor 562 and the pump 576, the battery pack 7 is provided by effectively utilizing the space (dead space) generated by the arrangement of the motor and the pump. Even if it is a structure, the drive part 5 can be comprised compactly. In addition, when FIG. 6 is seen from the left-right direction, since the battery pack 7 and the motor 562 overlap with the pump 576 (disposed on the back side of the pump 576 in FIG. 8), Dimensions can be reduced.

  The operation of the pump 576 will be specifically described. In the initial state, the valves 574 and 575 are closed, and the state shown in FIG. 9 is reached in which the plunger 576A is located at the top dead center. When the plunger 576A moves to the bottom dead center side from this state, the volume of the compression chamber 573 increases, so that the compression chamber 573 becomes negative pressure. The suction side valve 574 is pulled and opened by negative pressure, and the discharge side valve 575 is pulled and closed by the negative pressure. When the suction side valve 574 is opened, the cleaning liquid from the suction port 571 flows into the compression chamber 573 via the suction side valve 574.

  When the plunger 576A further moves to reach the bottom dead center (the state shown in FIG. 8), the pressures in the compression chamber 573 and the suction port 571 become equal, so the suction side valve 574 is closed and the compression chamber 573 is sealed. . When the plunger 576A moves from the bottom dead center to the top dead center, the valves 574 and 575 are closed and the compression chamber 573 is sealed, so that the pressure in the compression chamber 573 increases. As the pressure increases, the suction side valve 574 remains closed and the discharge side valve 575 opens. As a result, the cleaning liquid in the compression chamber 573 is pushed by the plunger 576A and flows to the discharge port 572 via the discharge side valve 575, and high pressure cleaning liquid is discharged from the nozzle 31 described later via the high pressure hose 2 and the gun 3. .

  When the plunger 576A further moves to reach the top dead center (the state shown in FIG. 9), the cleaning liquid in the compression chamber 573 disappears, and the valve portion of the discharge side valve 575 is not pushed by the cleaning liquid, so the discharge side valve 575 is closed. As a result, the valves 574 and 575 are closed, and the initial state is restored. By repeating this operation, the cleaning liquid can be discharged at a high pressure.

  The pressurized cleaning liquid is supplied to the gun 3 through the discharge port 572 and the high-pressure hose 2. A nozzle 31 having a minimum diameter of about 0.6 mm is provided at the tip of the gun 3, and the cleaning liquid is further pressurized by the nozzle 31 and then discharged. Since the diameter of the nozzle 31 (the diameter of the discharge port) is as small as 0.6 mm, high-pressure discharge can be performed. The diameter of the nozzle 31 is optimally 0.6 mm in order to produce an output of about 7.0 MPa from the dimensions and flow rate of the compression chamber 573 and the plunger 576A of the present embodiment, but the cleaning liquid in one reciprocating motion of the plunger 576A. If the amount of extrusion is large, the nozzle diameter can be made larger than 0.6 mm. Conversely, if the amount of extrusion of the cleaning liquid is small, the nozzle diameter must be made smaller than 0.6 mm. That is, the nozzle diameter needs to be designed in consideration of the amount of the cleaning liquid pushed out of the plunger 576A.

  The sealing member 576C provided on the outer periphery of the plunger 576A, the valves 574 and 575, and the sealing members 574a and 575a provided on the valves prevent the cleaning liquid in the compression chamber 573 from leaking to the outside, that is, the compression chamber due to the movement of the plunger 576A. Since the pressure increase of 573 is not hindered, the cleaning liquid (pressure) that is pushed out by the plunger 576A is discharged from the nozzle 31 as it is. Thereby, high-pressure (for example, about 3.0 MPa) cleaning can be performed. Note that the pressure of 3.0 MPa was obtained experimentally by determining the minimum pressure at which dirt actually drops when the nozzle diameter is 0.6 mm. However, the minimum pressure is not limited to this, and can be appropriately set according to the diameter of the discharge port of the nozzle 31.

  On the other hand, there are other pump systems such as a rotary pump system instead of a plunger system. In this rotary pump system, when the pressure in the pump is increased, cleaning liquid is introduced between the rotating body constituting the pump and its case. Returns (backflow) and the pressure does not increase, so it is not suitable for high-pressure cleaning. This method is suitable for, for example, a nebulizer (pressure is about 0.5 MPa) that does not require high pressure.

  Here, the conventional general high-pressure washing apparatus employs a three-plunger method (three plungers). In the three-plunger method, three plungers are reciprocated with a phase difference of 120 degrees to discharge the cleaning liquid. Therefore, as shown in FIG. 10, the cleaning liquid is discharged in a state where there is almost no pulsation (theoretical flow fluctuation is about 13%). While continuous high-pressure discharge is possible, since the cleaning liquid is discharged continuously, the cleaning liquid is wasted. When a gear pump is used instead of the plunger pump, it can always be discharged continuously in a fixed amount, but as described above, it cannot discharge at a high pressure (for example, 3.0 MPa or more). However, since the high pressure cleaning apparatus 1 according to the present embodiment employs the 1 plunger system as described above, the above-described disadvantages of the 3 plunger system can be solved. In the one-plunger method, the cleaning liquid discharged from the nozzle 31 during one reciprocation of the plunger 576A (one rotation of the crank 576B) theoretically causes 100% pulsation (flow rate fluctuation) as shown in FIG. Fluctuate to have. Thereby, in the high-pressure washing apparatus 1 according to the present embodiment, the amount of the cleaning liquid used in the same time can be reduced to about 1/3 as compared with the three-plunger method. In this way, waste of the cleaning liquid is suppressed.

  In this embodiment, since the high-pressure cleaning is performed with the cleaning liquid stored in the tank 6, the cleaning liquid is limited. On the other hand, most conventional high-pressure washing machines are used by connecting to a water supply, and the washing liquid is supplied almost infinitely. Therefore, there is no problem in using the 3 plunger system when supplying the cleaning liquid from the water supply as in the conventional case, but when the cleaning liquid is limited as in the present embodiment, the tank 6 is used in the 3 plunger system. The cleaning solution in the inside is used up quickly. Accordingly, in the case of a tank system in which the cleaning liquid is limited, a 1 plunger system that can perform high-pressure discharge equivalent to the 3-plunger system and suppress waste of the cleaning liquid is suitable. Thereby, the working time can be lengthened.

  In addition, since the single plunger system includes only one plunger 576A, the sliding resistance due to the reciprocating motion can be reduced to about 1/3 compared to the three plunger system. In the three-plunger system, since the three plungers are driven, the sliding resistance between the plunger and the member supporting the plunger is large, and the waste of electric power is increased. On the other hand, in the 1 plunger system, since there is only one plunger as described above, the sliding resistance can be suppressed to about 1/3, and the waste of electric power can be suppressed. Therefore, in the high-pressure cleaning device 1 according to the present embodiment, the reciprocating motion of the plunger 576A, that is, the rotational efficiency of the motor 562 can be improved, so that the power consumption of the battery pack 7 is also suppressed.

  In the present embodiment, since the motor 562 is driven by the power supply from the battery pack 7, the power supplied is limited. On the other hand, since the conventional high-pressure washing machine is supplied with power from a commercial power source, the power supply is almost infinite. Therefore, when receiving a power supply from a commercial power supply as in the prior art, there is no problem even if a three-plunger method with a small power-saving effect is used, but the power supply is limited as in this embodiment. In the case of the 3-plunger system, the battery pack 7 will soon run out of power, and the motor 562 cannot be driven. Therefore, in the case of a cordless type (battery drive) with limited power supply, the rotation efficiency of the motor 562 can be improved while performing high-pressure discharge equivalent to the three-plunger method, and power consumption of the battery pack 7 can be suppressed. A one-plunger system that can be used is suitable. Thereby, the working time can be lengthened.

  Furthermore, since there are three plungers in the three-plunger system, a motor with a large rated output is required to overcome the sliding resistance, and the product itself is large and heavy. On the other hand, in the 1 plunger system, sliding resistance can be suppressed by using a single plunger, so a small motor may be used, and the number of parts can be reduced, making the product itself small and light. Can do. Therefore, the single plunger system can be used as a cordless type high voltage washing device 1 driven by a small and lightweight battery pack 7 (no need to connect to a commercial power source), so it is easy to carry and work by hand. It is possible to provide an easy-to-use high-pressure washing apparatus 1 that is not limited in place.

  Actually, the discharge port 572 (compression chamber 573) receives pressure from the high-pressure hose 2 side that prevents discharge of the cleaning liquid. That is, since the nozzle 31 has a small diameter of 0.6 mm, it is difficult to discharge the cleaning liquid. When the pressure at the discharge port 572 increases, the high-pressure hose 2 expands and acts similarly to the compression chamber 573 to suppress pulsation, so that 100% pulsation (flow rate fluctuation) as shown in FIG. 11 does not occur.

  In an extreme example, the pulsation of the cleaning liquid discharged from the nozzle 31 is close to 0% when the plunger 576A is reciprocated at a high speed (the pulsation is small), and the pulsation is low when the plunger 576A is reciprocated at a low speed. As shown in FIG. 11, it becomes close to 100% (pulsation increases). However, the reciprocating motion of the plunger 576A at an extremely high speed wastes cleaning liquid and electric power as in the case of the three-plunger system, and conversely, the reciprocating motion of the plunger 576A at an extremely low speed has insufficient cleaning ability. In addition, vibration due to pulsation may increase.

  Therefore, in the high-pressure cleaning device 1 according to the present embodiment, as shown in FIG. 12, the plunger 576A has a pulsation of the cleaning liquid discharged from the nozzle 31 of 20% or more, preferably 20% to 60%. The reciprocating motion (number of reciprocations), that is, the rotational speed of the motor 562 is controlled. Specifically, the control circuit 561 controls the motor 562 so that the plunger 576A reciprocates in the range of 1000 rpm to 5000 rpm.

  Accordingly, it is possible to discharge the cleaning liquid from the nozzle 31 at a pressure having a sufficient cleaning ability while suppressing waste of the cleaning liquid. In the present embodiment, the cleaning liquid having a pressure of about 3.0 MPa to 7.0 MPa is discharged from the nozzle 31 by reciprocating the plunger 576A in the range of 1000 rpm to 5000 rpm. In addition, although the high pressure in this Embodiment demonstrates concretely as 3.0 MPa or more, the thing higher than the pressure (for example, 0.3 MPa) of a general water supply is made into the high pressure.

  Here, the setting of the diameter D, the stroke S, and the rotation speed of the plunger 576A for obtaining a discharge pressure of 3.0 Mpa with a nozzle diameter of 0.6 mm in the single plunger pump 576 will be described in detail. The performance of the pump 576 depends on the diameter D of the plunger 576A, the stroke S, and the number of reciprocations N, and the amount V of water discharged per minute is expressed by Equation 1.

  V (L / min) = D (mm) × S (mm) × N (rpm) × α (Expression 1)

  In Equation 1, the diameter D is a dimension in the radial direction of the plunger 576A in FIG. 8, the stroke S is the distance between the dead points of the plunger 576A, and α is a return coefficient when the valve is opened and closed, which is a constant value. When the number of reciprocations of the plunger 576A is constant (the number of rotations of the motor 562 is constant) N (rpm), in order to realize a predetermined flow rate V (liter / minute), the diameter D and the stroke S are adjusted and designed. It is necessary to increase the diameter D and decrease the stroke S, or decrease the diameter D and increase the stroke S.

  When the diameter D is increased, the area through which the plunger 576A pushes out the cleaning liquid increases. For example, when the diameter D is 10 mm and a high pressure of 3.0 MPa is discharged, the required thrust is generally 236 kg because it is generally obtained by radius × radius × π × pressure. When the diameter D is increased by 2 mm, a thrust of 339 kg is required. In other words, the thrust must be increased by 103 kg just by increasing the diameter D by 2 mm. In order to increase the thrust, the motor 562 must be changed to one having a high output (large size), and the bearing and housing that receive the reaction force must be strengthened. This leads to an increase in the size and cost of the high-pressure cleaning device 1.

  On the other hand, when the stroke S is increased, the amount of movement of the plunger 576A increases. For example, when the stroke S is 5 mm, a clearance of the compression chamber 573 corresponding to the radius of the crank 576B of 2.5 mm and the stroke of 5 mm is necessary, but in order to further extend the stroke S by 5 mm, the crank radius of 5 mm and the stroke of 10 mm A gap between the compression chambers 573 is required. That is, if the stroke is increased by 5 mm, a total extension structure of 7.5 mm is required, which leads to an increase in the size of the high-pressure cleaning device 1. Furthermore, when the number of reciprocations N of the plunger 576A is constant, the time taken for one stroke is constant Δt seconds, so the average plunger speed U can be expressed by Equation 2.

  U (m / s) = N (rpm) ÷ 60 × S (m) × 2 (Expression 2)

  When the reciprocation number N of the plunger 576A is constant at 3000 rpm, the speed U is 0.5 m / s when the stroke S is 5 mm, 1.0 m / s when the stroke S is 10 mm, and the average plunger speed is doubled. Since the plunger 576A reciprocates while being in contact with the seal member 576C and the metal 576D, the speed is increased by increasing the stroke S. Therefore, a material with higher wear resistance must be used, leading to an increase in cost. End up.

  Next, consider a case where the number of reciprocations of the plunger 576A (the number of rotations of the motor 562) N is variable. In the case of an arbitrary number of reciprocations N, in order to realize a predetermined amount of water V, it is necessary to design by adjusting the number of reciprocations N and the displacement volume J. Here, the displacement volume J is obtained by multiplying the cross-sectional area of the plunger 576A by the stroke S.

  When the number of reciprocations N is increased, the displacement volume J can be reduced, so that the plunger 576A can be reduced in size. Since there is the high-pressure hose 3 from the plunger 576A to the nozzle 31, the pulsation is suppressed by the expansion and contraction of the high-pressure hose 3. That is, when discharging at high speed (finely), the discharge pulsation is reduced and the effect of restricting the flow rate is reduced as compared with the theoretical discharge waveform of the single plunger system (FIG. 11).

  On the other hand, when the number of reciprocations N is reduced, the displacement volume J increases and the plunger 576A increases. In this case, since it becomes close to the theoretical discharge waveform of the 1 plunger system (FIG. 11) and the discharge pulsation becomes large, it is possible to increase the flow restriction effect, but the pulsation causes the generation of vibrations. Even if the number of reciprocations N is extremely small, it is not preferable.

  Accordingly, the diameter D and stroke S of the plunger 576A and the number of reciprocations N need to be set optimally in consideration of the size, cost, flow rate, etc. of the product. In this embodiment, while suppressing the increase in size and cost of the product, the optimum use range that can suppress the amount of water and power and suppress vibration is experimentally obtained, the plunger diameter D is 5 to 20 mm, the stroke S is 3 to 10 mm, and the plunger reciprocation number N is 1000 to 5000 rpm. Specifically, in order to obtain a discharge pressure of about 7.0 PMa at the maximum with a nozzle diameter of 0.6 mm, in this embodiment, the optimum dimensions are a plunger diameter D of 12 mm and a stroke S of 5 mm (of the crank 576B). The eccentricity is 2.5 mm), and the plunger reciprocation frequency N is 3000 rpm.

  Further, in the 1 plunger system, the discharge pulsation is theoretically 100% as shown in FIG. 11, but in reality the flow rate (pulsation) becomes 0 because the high pressure hose 3 expands and contracts to act as a pressure accumulating chamber. The pulsation is in the range of 20 to 60% as shown in FIG. Therefore, at least if the discharge pulsation is in the range of 20 to 60%, the amount of water can be suppressed as compared with the conventional 3-plunger system. That is, assuming that the discharge pressure is a maximum of 3.0 MPa, when the pulsation is about 20% to 60% (0.6 MPa to 1.8 MPa) from the maximum 3.0 MPa, the minimum value is 1.2 MPa to 2.4 MPa. The amount of water (wasted cleaning fluid) can be suppressed.

  The discharge time time of the maximum pressure is a certain time (instantaneous) during one reciprocation of the plunger 576A, and the time other than the maximum pressure is much longer. As shown in FIG. 12, when the pulsation is within 20% (high pressure discharge), the region of t1 to t2 during one reciprocation of the plunger 576A, and the pulsation of 20% or more is the other region. Therefore, if the maximum pressure region is a region where the pulsation is 20% or more, the time is about ¼ time during one reciprocation, so that the amount of water (wasting of cleaning liquid) can be suppressed.

  From the above, in the case of the 1 plunger system, the discharge pressure can be increased to a peak value equivalent to that of the conventional 3 plunger system for each stroke of the plunger 576A, and the cleaning liquid can be discharged, so that high pressure cleaning is possible. At this time, since the discharge pressure (water amount) is pulsating, it is possible to perform cleaning while saving the cleaning liquid as compared to the case of continuous discharge as in the conventional 3-plunger method. Further, the area A in FIG. 12 is the total amount of water actually discharged, that is, the portion where the pump 576 has worked, and the work amount is about half that of the conventional three-plunger system shown in FIG. Therefore, high-pressure cleaning equivalent to that of the conventional product can be performed while suppressing power consumption of the battery pack 7 and waste of cleaning liquid.

  In the three-plunger system, instead of the crank 576B, a rotating swash plate having a constant axial thickness of the plunger is used. Specifically, the rotary swash plate is arranged so that its surface faces the three plungers. By rotating the rotary swash plate in this state, the plungers in contact with the thickness portions of the rotary swash plate are sequentially arranged. It is pushed out and reciprocates.

  However, in such a configuration, the rotating swash plate and the plunger slide, and power is wasted due to the sliding resistance.

  However, in this embodiment, since the configuration in which the plunger 576A is reciprocated by the crank 576B is adopted, the sliding between the crank 576B and the plunger 576A is less than that in the three-plunger method (the sliding between the rotary swash plate and the plunger). There is no dynamic resistance), and also in this respect, waste of electric power is suppressed. In this embodiment, the 1-plunger method has been described. However, a 2-plunger method having a smaller number of plungers than the 3-plunger method may be used, and a discharge pressure equivalent to that of the 3-plunger method can be obtained while suppressing the discharge water amount. I can do it. In the case of the two plunger system, the two plungers reciprocate with a phase difference of 180. Therefore, since the cleaning liquid is not always discharged, it is inferior to the 1 plunger method, but has water saving and power saving effects as compared with the 3 plunger method.

  Next, selection of the capacity of the battery pack 7 capable of performing high-pressure discharge in the cordless type high-pressure cleaning apparatus 1 that includes the tank 6 and is driven by the battery pack 7 as in the present embodiment will be described.

  As shown in FIG. 39, the main components of the high-pressure washing apparatus 1 are a battery pack 7, a motor 562, and a pump 576. The power supplied from the battery pack 7 is limited, and the power consumption depends on the efficiency of the motor 562 and the pump 576.

  Considering the conversion efficiency of each part, as shown in FIG. 39, the first efficiency (η1) for converting the electric power of the battery pack 7 into the rotational motion of the motor 562 and the rotational motion of the motor 562 are pump 576 (plunger 576A). There is a second efficiency (η2) that converts to a reciprocating motion (compression motion of the cleaning liquid). Their conversion efficiency is ideally 100%, but in reality, the first efficiency (η1) is copper loss, iron loss, mechanical loss, etc., and the second efficiency (η2) is mechanical loss, piping loss, etc. The cause is not 100% conversion efficiency. That is, if the battery pack 7 and the motor 562 are selected in accordance with each efficiency (η1, η2), the cordless type (battery drive) cleaning device 1 capable of high-pressure discharge can be realized. First, the motor output required to drive the pump 576 based on the second efficiency (η2) will be examined. The power W2 (motor output, second power) necessary for driving the pump 576 can be generally expressed by Equation 3 where the discharge pressure is P and the discharge flow rate is Q.

  W2 (W) = P (MPa) × Q (L / min) × 1000 ÷ 60 ÷ η2 (Equation 3)

  FIG. 40 shows a graph when the normal discharge pressure P is 3.0 MPa (minimum pressure of a general household high-pressure washing machine) and the normal discharge flow rate Q is 1 liter / min. The horizontal axis is the second efficiency η2, and the vertical axis is the power W2.

  Here, similarly to the pump efficiency of a general high-pressure washing apparatus, assuming that the second efficiency η2 is 50% to 80%, the power W2 is about 60W to 100W from FIG. Therefore, the power W2 (motor output) necessary for driving the pump 576 is about 60W to 100W.

  Next, the motor 562 is driven by electric power supplied from the battery pack 7. Therefore, the battery pack 7 electric power W1 (first electric power) necessary for obtaining about 60 W to 100 W as the power W2 (motor output) is considered. Since the power W2 is a value obtained by multiplying the battery pack power W1 and the first efficiency η1, the battery pack power W1 is a value obtained by dividing the power W2 by the first efficiency η1, as shown in FIG. The horizontal axis represents the first efficiency η1, and the vertical axis represents the battery pack power W1.

  Here, assuming that the motor efficiency is 50% to 80% when the motor 562 is generally the most used DC motor, assuming that the first efficiency η1 is 50% to 80%, FIG. Therefore, the first power W1 is about 75W to 200W. Therefore, in the most inefficient combination of the power W2 and the battery pack power W1, the battery pack 7 requires 200 W of power. If the motor 562 is a brushless motor, the motor efficiency is improved. Therefore, the power of the battery pack 7 is less than 200 W and there is no problem, and the minimum power of the battery pack 7 can be appropriately set according to the type of the motor to be used.

  Next, the battery pack 7 will be described. From the above, the electric power required for the battery pack 7 is 200 W. On the other hand, if 4 liters of cleaning liquid can be stored in the tank 6, the battery pack 7 can be easily operated if all the 4 liters of cleaning liquid can be discharged in one operation (one charge of the battery pack). Accordingly, if the discharge flow rate Q of the nozzle 31 is 1 liter / min, the battery pack 7 needs a battery capacity of about 13.3 Wh at 200 (W) × 4 (min) ÷ 1 = 800 (W · min). Become.

  In order to obtain an output of 200 W of the battery pack 7, considering a lithium ion battery, if the rated voltage of the lithium ion battery cell is 3.6 V and the discharge current is 20 A, at least three battery cells are required (3.6 V × 3 (series or parallel) × 20A = 216W). That is, when battery cells are connected in series, a battery pack 7 of 10.8 V or higher can be applied. Even if three or more battery cells are connected in parallel, a battery output of 10.8 V or more can be obtained. The battery pack 7 used in the electric tool has a rated voltage of 3.6 V, 10.8 V, 14.4 V, 18.0 V, 25.2 V, 36.0 V, a battery capacity of 1.5 Ah, and 2. 0Ah, 3.0Ah, etc. The battery voltage depends on the number of battery cells connected in series, and the battery capacity varies depending on the number of battery cells connected in parallel. For example, 10.8V when 3 battery cells are connected in series and 3.0Ah when 2 1.5Ah are connected in parallel. Become. Although the voltage and capacity per battery cell vary depending on the cell manufacturer, a rated voltage of 3.6 V and a capacity of 1.5 Ah will be described as an example, but the present invention can be applied to various battery cells.

  To satisfy the required battery capacity of 13.3 Wh, the battery pack 7 with a rated voltage of 10.8 V and a battery capacity of 1.5 Ah has a capacity of 16.2 Wh. Can be satisfied. Even if the battery pack 7 has a rated voltage of 3.6 V, the required capacity can be satisfied by connecting three battery cells in parallel.

  Next, consider working time. For example, in the case of the battery pack 7 having a rated voltage of 10.8 V and a capacity of 1.5 Ah, the battery energy is 16.2 Wh. If the minimum power of the battery pack 7 is 200 W, the work can be performed for about 5 minutes. During this time, the cleaning liquid (4 liters) in the tank 6 can be used up. That is, it is possible to secure at least a time during which the cleaning liquid in the dedicated tank 6 of the high-pressure cleaning apparatus 1 can be used up.

From the above, the rated voltage (V), battery capacity (Ah), battery energy (Wh), and workable time (minutes) are as shown in Table 1. At this time, the discharge pressure is 3.0 MPa, the discharge water amount is 1 liter / min, the battery output is 200 W, and the average discharge current is 20 A (per battery cell). In the case of a lithium battery, if an excessive current is passed, it causes deterioration of the battery. Therefore, the average discharge current is preferably suppressed to 30 A or less. For example, a current detection unit is provided in the battery pack 7 or the control circuit 561 to detect the current as needed every predetermined time. If the average discharge current exceeds, for example, 30 A for a predetermined number of times in 10 seconds, it is determined as an overcurrent and the discharge is stopped. It may be. In this case, a display unit may be provided in the gun 3 to indicate that it has been stopped due to overcurrent by an LED or the like. Furthermore, the remaining capacity of the battery pack 7 may be displayed on the display unit.

  In this embodiment, since the battery pack 7 has a rated voltage of 14.4 V and a battery capacity of 3.0 Ah, the battery energy is 43.2 Wh, the output is 288 W, the work time is about 13 minutes, and two of the dedicated tank 6 are used. Working time of more than a minute can be secured. This is the time during which all windows on the second floor of a typical home can be cleaned. In addition, the battery voltage can be boosted or lowered.

  In the present embodiment, the cleaning capability is described as 1 liter / min. However, the cleaning capability may be increased. Various applications are conceivable, such as when it is desired to increase the cleaning ability even if the weight is somewhat heavy depending on the application, or when priority is given to weight even if the cleaning ability is suppressed. For example, in the case of 3 liters / minute at 3.0 MPa, the battery output needs 600 W according to the above formula. For this, a battery pack having a rated voltage of 36.0 V may be used from Table 1. In recent years, the 36.0V battery is being used as a gardening tool and has a weight (about 1.4 kg) that can be carried by an operator. Furthermore, in the case of a conventional product having a capacity of 5 liters / minute (battery output 1000 W) or a capacity of 6 liters / minute, two 36.0 V batteries may be used. Since the weight of the 14.4V, 3.0Ah battery pack is about 530g, and the weight of 18.0V, 3.0Ah is about 700g, battery output is required and the weight of the battery pack of one size is also heavy. Is not significantly heavier, so portability is not compromised.

  Further, when the discharge pressure is 7 MPa, the battery output is about 450 W in the case of 1 liter / min, 1400 W in the case of 3 liter / min, and about 2300 W in the case of 5 liter / min. What is necessary is just to use it by combining a some battery pack. As described above, when a plurality of battery packs 7 are combined, the weight of the product becomes heavy. However, if the high-pressure washing apparatus 1 is provided with wheels or the like and can be transported while being dragged, portability is improved. There is no loss.

  In this embodiment, the 1-plunger method is adopted. However, when priority is given to the cleaning performance over the consumption and weight of the cleaning liquid and electric power, the conventional 3-plunger method may be used. Even in this case, the battery pack 7 can be used for driving. For example, if the cleaning capacity is 1 liter / min at 3 MPa, the number of plungers is simply three times, so the battery output also needs three times 600 W. In that case, a 36.0V battery may be used. That is, depending on the purpose and application, a single plunger system may be used instead of a three plunger system, and it is only necessary to provide a high pressure washing apparatus 1 that can discharge at high pressure while being driven by the battery pack 7.

  Next, the weight of the high pressure washing apparatus 1 will be considered. Unlike the conventional product, the high-pressure washing apparatus 1 of the present embodiment is a so-called cordless type that uses the battery pack 7 as a drive source of the motor 562 and can move the tank 6 integrally with the main body. Considering portability, the lightest possible weight is desirable. In particular, since the weight of the battery pack 7 directly leads to the weight of the high-pressure washing apparatus 1, it is desirable to suppress the weight of the battery pack 7. On the other hand, the conventional high-pressure washing apparatus driven by a commercial power supply is about 4.5 kg in the FAW-SA series sold by the applicant. Accordingly, it is desirable that the weight of the drive unit (mainly the portion of the lower housing 5 in FIG. 1 including the motor 562, the pump 576, and the battery pack 7) excluding the weight of the tank 6 is equal to that of the conventional product. If the battery pack 7 is less than 2 kg and the pump portion (including the pump 576 and the motor 562) is about 2 kg for a total of about 4 kg, the portability can be improved while the weight is equivalent to that of the conventional product. In addition, since the largest 36V product in the applicant's battery pack 7 has a weight of about 1.4 kg, all the battery packs 7 are less than 2 kg, and the conditions can be satisfied.

  The high-pressure washing apparatus 1 according to the present embodiment has a driving unit weight of about 4 kg (including the battery pack 7, pump 576, and motor 572) and is equivalent to the conventional product, and the tank 6 has a weight of 4 kg (contains 4 liters of washing liquid). Even if it adds, it is about 8 kg, and the cordless type high-pressure washing apparatus 1 that can be carried can be realized.

  From the above, considering the efficiency η1 (50 to 80%) from the battery pack 7 to the motor 572 and the efficiency η2 (50 to 80%) from the motor 572 to the pump 576, the high-pressure cleaning device 1 (3.0 MPa, 1 liter) The minimum power W2 (100 W) and battery pack power W1 (200 W) required when the cordless type driven by the battery pack 7 is calculated. That is, according to the present embodiment, the cordless type high-pressure washing apparatus 1 can be provided by setting the power W2 to 100 W or more and the battery pack power W1 to 200 W or more. Furthermore, if the battery capacity is 200 W or more and the battery capacity is 13.3 Wh or more, all of the cleaning liquid in the dedicated tank 6 can be discharged. Moreover, even if it is a case where it is a weight equivalent to a conventional product, the existing battery pack can be used. In the present embodiment, since the motor 562 is described as a commutator DC motor, the conversion efficiency is set to 50% to 80%. However, if a brushless motor is used, the conversion efficiency (80% or more) is improved, and the battery pack 7 The power required for

  As described above, in the high-pressure washing apparatus 1 according to the first embodiment of the present invention, since the motor 562 is driven by the power from the battery pack 7, it is used even when a commercial power source cannot be obtained. Is possible. Further, since a power cable for obtaining power from a commercial power source is not required, it is possible to perform a wide range of high-pressure washing without being limited by the length of the power cable. In addition, since no voltage drop is caused by the power cable, stable high-pressure cleaning can be performed.

  Further, since the plunger 576A is disposed so as to form a part of the compression chamber 573, it is always cooled by the cleaning liquid. In the high-pressure cleaning device 1 according to the present embodiment, the plunger 576A and the crank 576B connected to the plunger 576A are formed of an aluminum alloy having high thermal conductivity. Thereby, since the cooling effect by the cleaning liquid is transmitted over a wide range, the temperature in the high-pressure cleaning apparatus 1 can be prevented from rising due to the heat generated by the motor 562 and the like.

  Further, since the inside of the lower housing 5 is partitioned into a battery chamber 55, a motor chamber 56, and a pump chamber 57 by a partition plate 54, the cleaning liquid from the pump chamber 57 to the battery chamber 55 and the motor chamber 56 is supplied. Inflow can be suppressed. Further, since the tank 6 is provided above the drive unit (pump chamber 57 and the like), the cleaning liquid flows into the drive unit by its own weight, and it is not necessary to separately provide a pump for sucking up the cleaning liquid.

  In addition, since the battery pack 7 can be attached to and detached from the lower housing 5, the battery pack 7 can be easily charged or replaced.

  Moreover, since the battery pack 7 can be used also for an electric tool, the battery pack 7 used for the electric tool can be used for the high-pressure washing apparatus 1.

  Next, a high-pressure cleaning apparatus 1A according to a second embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 13 and 14, the high-pressure washing apparatus 1A includes a housing 5A and a tank 6A disposed below the housing 5A. In the housing 5A, a battery chamber 55, a motor chamber 56, And the pump chamber 57 is formed (refer FIG. 17).

  Hereinafter, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 13 to 16, the housing 5A includes a pair of latches 51A, and the housing 5A and the tank 6A can be separated by releasing the pair of latches 51A.

  As shown in FIGS. 15 to 17, a suction pump 521 is connected to the suction port 571 of the housing 5A, and the suction pump 52A extends into the tank 6A to suck up the cleaning liquid.

  As shown in FIG. 17, the partition plate 54 is provided with a seal member 54 </ b> A (first seal member) for more reliably preventing the cleaning liquid from flowing from the pump chamber 57 into the battery chamber 55 and the motor chamber 56. It has been. Since the housing 5A is divided into two (left and right in FIG. 15), the sealing performance can be improved by providing the sealing member 54A.

  As shown in FIGS. 17 and 18, the battery cover 53 is formed with an engaging protrusion 53A and a waterproof protrusion 53B. The battery chamber 55 has an engaged portion 55A and a seal portion 55B (second portion). Sealing member) is provided.

  When the battery cover 53 is closed, the engaging protrusion 53A engages with the engaged portion 55A, and at the same time, the waterproof protrusion 53B comes into contact with the seal portion 55B. This more reliably prevents the cleaning liquid or the like from entering the battery chamber 55 from the outside.

  Further, as shown in FIG. 19, a guide rail 55C and a latched portion 55D are formed in the battery chamber 55, and the battery pack 7 can be engaged with the guide rail 55C as shown in FIG. A latch portion 7B that can be engaged with the guided portion 7A and the latched portion 55D is formed. The battery pack 7 is also formed with a terminal 7C for supplying power.

  When mounting the battery pack 7 in the battery chamber 55, as shown in FIG. 19, the battery pack 7 is first inserted into the battery chamber 55 from above, and the guided portion 7A of the battery pack 7 is inserted into the battery chamber 55. The guide rail 55C is engaged. By pressing the battery pack 7 downward in this state, the battery pack 7 is guided to the lowest point of the battery chamber 55 by the guide rail 55C as shown in FIG. When the battery pack 7 reaches the lowest point, the terminal 7 </ b> C of the battery pack 7 contacts the electrode 551 of the battery chamber 55. As a result, power can be supplied from the electrode 551 to the control circuit 561 and the motor 562. At this time, the latch portion 7B of the battery pack 7 is engaged with the latched portion 55D of the battery chamber 55, and the battery pack 7 is fixed in the battery chamber 55.

  As described above, in the high-pressure cleaning apparatus 1A according to the present embodiment, the battery chamber 55 and the motor chamber 56 are accommodated in the housing 5A disposed above the tank 6A. Even if it leaks, there is little possibility that the cleaning liquid flows into the battery chamber 55 and the motor chamber 56. Accordingly, it is possible to prevent the cleaning liquid from being applied to the battery pack 7, the control circuit 561, and the motor 562 that are accommodated in the battery chamber 55 and the motor chamber 56 and failing.

  Further, since the partition plate 54 is provided with the seal member 54 </ b> A, the inflow of the cleaning liquid into the battery chamber 55 and the motor chamber 56 is further suppressed. Further, since the battery chamber 55 is also provided with the seal portion 55B, it is possible to suppress the intrusion of the cleaning liquid or rainwater into the battery chamber 55.

  Further, since the battery pack 7 is guided by the guide rail 55 </ b> C formed in the battery chamber 55 when being attached to and detached from the battery chamber 55, the battery pack 7 can be easily attached to the battery chamber 55.

  Further, the battery pack 7 has a latch portion 7B. When the battery pack 7 is attached to the battery chamber 55, the latch portion 7B engages with the latched portion 55D of the battery chamber 55, so that the battery pack 7 can be securely and easily attached. It can be fixed to the battery chamber 55.

  Next, a high-pressure washing apparatus 1B according to a third embodiment of the present invention will be described with reference to FIGS.

  Hereinafter, the same members as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 22 and 25, the high-pressure washing apparatus 1B is composed of only a housing 5A. A first engaging portion 5a that can be engaged with a commercially available plastic tank 6B at the lower portion of the housing 5A, and a commercially available pet A second engaging portion 5b that can be engaged with the bottle 6C.

  In detail, the 1st engaging part 5a has a cylindrical shape, and the internal thread corresponding to the external thread formed in the spout of the commercially available poly tank 6B is cut in the inner peripheral surface. Similarly, the 2nd engaging part 5b also has a cylindrical shape, and the internal thread corresponding to the external thread formed in the spout of the commercially available PET bottle 6C is cut in the inner peripheral surface.

  Thus, in the high-pressure washing apparatus 1B according to the present embodiment, a dedicated tank such as the tank 6 in the first embodiment or the tank 6A in the second embodiment is not required, and a commercially available container is used. It is possible to perform high-pressure washing work.

  Next, a high-pressure cleaning apparatus 1C according to a fourth embodiment of the present invention will be described with reference to FIGS.

  Hereinafter, the same members as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 26 to 28, the high-pressure washing apparatus 1C includes an adapter 8 that can connect the inlet 451 of the housing 5B and a commercially available container.

  The adapter 8 includes an engaging portion 8a, a fitting portion 8b, and a pair of locking portions 8c serving as fixing portions.

  The engaging portion 8a has a cylindrical shape, and a female screw corresponding to a male screw formed on a spout of a commercially available container (in this embodiment, a plastic bottle 6C) is cut on the inner peripheral surface. ing.

  The fitting part 8b is provided above the engaging part 8a and has a concave shape with an upper part opened.

  Each locking portion 8c is swingable about a shaft 8d, and includes a locking protrusion 8e that protrudes inward from the upper end. Further, each locking portion 8c is urged by a spring or the like (not shown) so that the locking projection 8e is directed inward. In addition, the latching | locking part 8c may be provided in the press part 45A side instead of the adapter 8, and the container 6C should just be the structure which does not drop from the high pressure washing | cleaning apparatus 1. FIG.

  The housing 5B includes a pressing portion 45A similar to that of the first embodiment at the lower portion.

  The pressing portion 45A extends in the vertical direction, and an inflow port 451 extending in the vertical direction is formed therein. Further, a locked portion 45a having a concave shape with an opening on the outside is formed at the upper end of the pressing portion 45A.

  When attaching the PET bottle 6C to the high-pressure washing apparatus 1C, as shown in FIG. 27, the engaging portion 8a of the adapter 8 is engaged with the male screw formed on the spout of the PET bottle 6C, and the adapter 8 fitting portions 8b are inserted into the pressing portions 45A of the housing 5B. Then, as shown in FIG. 28, when the locking projection 8e is inserted until it becomes the same height as the locked portion 45a of the pressing portion 45A, the locking projection 8e biased inward is locked. The adapter 8 (pet bottle 6C) is fixed to the housing 5B by engaging with the portion 45a.

  Thus, in this Embodiment, since the high pressure washing | cleaning apparatus 1C and a commercially available container can be connected by the adapter 8, if a plurality of types of adapters 8 are prepared, the high pressure washing apparatus 1C is used in various situations. It becomes possible to perform a high-pressure washing operation.

  The high-pressure washing apparatus according to the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope described in the claims.

  For example, as shown in FIG. 29, various containers may be configured to be usable in the pressing portion 45 in the first embodiment via the adapter 8 in the fourth embodiment. Further, if the pressing portion 45 is provided in the lower housing 5, the lower housing 5 is separated from the upper housing 4, and if the lower housing 5 is turned upside down (the pressing portion 45 is downward), as shown in FIG. It can be connected to the tank 6A, and the number of containers that can be used, such as the dedicated tank 6, the PET bottle 6C, and the tank 6A, can be increased.

  In addition, as shown in FIG. 30, the pressing portion 45 in the first embodiment is placed below the housing 5A in the second embodiment, and the tank 6A in the second embodiment is used in the fourth embodiment. If the fitting portions 8b are respectively provided and the housing 5A is arranged at a predetermined position with respect to the tank 6A, the engagement between the housing 5A and the tank 6A by the pair of latches 51A is facilitated.

  As shown in FIGS. 31 and 32, an adapter 8A that does not include a pair of locking portions 8c may be used in place of the adapter 8 in the fourth embodiment. Note that the tank 6B can be securely fixed to the housing 5A by providing the pair of locking portions 8c.

  As shown in FIG. 33, an adapter 8B that can be engaged with the high-pressure hose 2 may be used in place of the adapter 8 in the fourth embodiment. Usually, the power cable and the water hose are often much shorter than the power cable, so even with such a configuration, the object of the present invention can be achieved in which a wide range is washed with high pressure. In addition, it is good also as a structure provided with the connection port which can connect alternatively the commercially available plastic tank 6B, the commercially available plastic bottle 6C, and the water supply hose 2 as an adapter. That is, the first engaging portion 5a and the second engaging portion 5b of FIG. 23 or the connection port of the hose 2 may be integrally provided on the adapter so that the pressing portion 45 can be attached and detached. With this configuration, it is possible to connect to various water sources (plastic bottles, plastic tanks, waterworks) with one adapter. Moreover, if the diameters of the pressing portions 45 and 45A are the same, it is not necessary to provide a plurality of types of adapters. In addition, the diameter of the press part 45 has a dimension which a water supply hose attaches.

  Further, for the same purpose, as shown in FIG. 34, the water hose 9 may be attached to the housing 5A.

  As shown in FIG. 35, in the second embodiment, a further seal member 54B (third seal member) may be provided between the electrode 551 in the battery chamber 55 and the battery pack 7. According to such a configuration, problems such as a short circuit due to the inflow of the cleaning liquid between the electrode 551 and the battery pack 7 are suppressed. Further, if the battery cover 53 is also provided with a seal member, the inflow of the cleaning liquid from the outside to the battery chamber 55 can be suppressed. If the seal members 54A, 54B, 55B are provided in the first embodiment, it is more effective when the tank 6 is disposed above the drive unit (motor, pump).

  As shown in FIG. 36, the battery pack 7 does not necessarily need to be detachable from the battery chamber 55, and may not include the battery cover 53 that can be opened and closed. Further, the battery pack 7 may not necessarily be detachable from the electric tool. That is, a configuration in which a dedicated battery is built in the housing may be used, or a dedicated battery pack for the high-pressure cleaning device 1 may be provided. In the case of a built-in battery, it is possible to charge the dedicated battery pack by providing a charging terminal on the housing, etc. If the charging terminal has a waterproof structure (for example, covered with a lid provided with a seal member), waterproof measures are taken. Good.

  Further, the pump 576 is not limited to the above embodiment, and may be a piston pump, for example.

  Moreover, in the said embodiment, although it controlled so that the washing | cleaning liquid discharged from the nozzle 31 had a pressure of 3 Mpa-7MPa, the minimum pressure does not need to be 3MPa and what is necessary is just to have the pressure which can be wash | cleaned. . In the above embodiment, it has been experimentally determined that dirt can be washed if it is 3.0 MPa, but can be appropriately changed according to the nozzle diameter and the like. For example, even if it is 2.5 MPa, what is necessary is just to be washable.

  Moreover, if the high-pressure washing apparatus according to the above embodiment is provided with a shoulder, the convenience for a wide range of high-pressure washing is further enhanced. For example, as shown in FIG. 1, if a pair of hooks 4a (belt mounting portions) for a shoulder belt is provided on the side surface of the upper housing 4, and if necessary, the shoulder belt is attached to the hook 4a, the carrying becomes easy. Workability can be improved because the work can be performed while the high-pressure washing device is placed on the shoulder. Moreover, it may be hung not on the shoulder but on the belt or on the back.

  Moreover, in the said embodiment, although the washing | cleaning liquid container was provided in the upper direction and the downward direction of the housing, you may provide in the side of a housing. In this case, the pump may have the same structure as in FIG. 1 if the opening (outlet) of the container faces downward, or the same structure as in FIG. 13 if the opening faces upward.

1-1C High pressure washing device 2 High pressure hose 3 Gun 4 Upper housing 5 Lower housing 5 Lower housing 5A Housing 5B Housing 5a Engaging part 5b Engaging part 6 Tank 6A Tank 6B Poly tank 6B PET bottle 6C PET bottle 7 Battery pack 7A Guided Part 7B Latch part 7C Terminal 8-8B Adapter 8a Engagement part 8b Engagement part 8c Engagement part 8d Shaft 8e Engagement protrusion 9 Water hose 31 Nozzle 41 Main body 42 Lid part 43 Upper latch 44 Lower latch 45 Press part 45A Press part 45a Engagement part 51 Hose connection port 51A Latch 52 Start switch 52A Pump 53 Battery cover 53A Engagement protrusion 53B Waterproof protrusion 54 Partition plate 54A Seal member 54B Seal member 55 Battery chamber 55A Engagement part 55B Seal part 55C Guide rail 55D Latched part 56 Motor chamber 57 Pump chamber 61 Connection portion 62 Outlet 63 Pressed portion 64 Outflow prevention valve 65 Fitting portion 451 Inlet 551 Electrode 561 Control circuit 562 Motor 571 Suction port 572 Discharge port 573 Compression chamber 574 Suction side valve 575 Discharge side valve 576 Pump 576A Plunger 576B Crank

Claims (7)

A high-pressure cleaning apparatus having a nozzle and discharging a cleaning liquid from the nozzle at a high pressure,
A high-pressure cleaning apparatus, wherein the discharge pressure is pulsated at a fluctuation rate of 20% or more.   The high-pressure washing apparatus according to claim 1, wherein the discharge pressure pulsates when the maximum value is 3 MPa or more and the minimum value is 2.4 MPa or less.   The first region where the discharge pressure is 2.4 MPa or more is approximately three times or more the second region where the discharge pressure is smaller than the first region. High pressure cleaning device.   The high-pressure washing apparatus according to any one of claims 1 to 3, wherein the discharge pressure is pulsated by using a reciprocating pump driven by a motor and including a single reciprocating member.   The high-pressure washing apparatus according to claim 4, wherein the motor is supplied with electric power from a battery capable of outputting 200W or more.   The high-pressure cleaning apparatus according to claim 5, wherein the battery is for an electric tool.   The high-pressure washing apparatus according to claim 5 or 6, wherein the battery has a weight of 2 kg or less.

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