A high pressure cleaning machine

Abstract

The invention discloses a high-pressure cleaning machine, comprising a water pump, a controller and a shell. The shell comprises a nozzle and a pressure regulating switch. The nozzle is connected to the water outlet of the water pump. The pressure regulating switch is connected to the input port of the controller. The first output end of the controller is connected to a driving motor M of the water pump. The controller controls the water output of the water pump according to the instruction of the pressure regulating switch, so as to form different output water pressures at the nozzle. The driving motor M is an AC motor. The first output end is electrically connected to the power input end of the driving motor M. The controller adjusts the rotation speed of the driving motor M by controlling the input voltage of the driving motor M, so as to adjust the water output of the water pump. A relatively large-power AC motor is used to drive the water pump, so that the water pressure of the high-pressure cleaning machine is greater and the cleaning effect is better. The adjustable output water pressure range of the high-pressure cleaning machine is greater. The water output of the water pump is adjusted by adjusting the input voltage of the driving motor M, and the adjustment is rapid, reliable and convenient.

Description

Technical Field

[0001] The invention relates to a high-pressure cleaning machine. Background Art

[0002] A high-pressure cleaner is a machine that uses high-pressure water flow to clean the surface of an object. In addition to being the most ideal cleaning tool for various types of vehicles and various types of construction machinery, a high-pressure cleaner can also be used to clean the exterior walls of buildings, floors, baths, and swimming pools. It is particularly effective for doors and windows, floors, toilets, oil stains, and corners that are difficult to clean manually. The high-pressure cleaner includes a housing, a controller, a DC motor, and a water pump. The housing includes a nozzle and a control switch. The water pump is connected to an external water storage tank. The water outlet of the water pump is connected to the nozzle. The water pump is driven by a DC motor. The input port of the controller is connected to the control switch. The output port of the controller is connected to the internal control chip of the DC motor. The controller controls the operation of the drive motor and uses the water pump to transport water to the nozzle to form a high-pressure water flow to clean objects. Different places and different cleaning objects require different water pressures. To adapt to applications in different scenarios, existing high-pressure cleaners are provided with two gears, a high-pressure gear and a low-pressure gear. The output water pressures of different gears are different. The control switch includes two gear switches, which correspond to the high-pressure gear and the low-pressure gear respectively. The controller controls the speed of the DC motor through the selection of the gear switch, thereby adjusting the output water pressure of the water pump. However, such a gear setting can no longer meet people's needs, and adding a gear switch will not only increase the size of the high-pressure cleaner but also increase the control complexity of the controller. Summary of the invention

[0003] The invention provides a high-pressure cleaning machine, which is used to solve the problems in the prior art that the high-pressure cleaning machine has few gear selections and complex control.

[0004] The technical solution of the present invention is achieved in this way:

[0005] The object of the present invention is to provide a high-pressure cleaning machine, comprising a water pump, a controller and a shell, the shell comprising a nozzle and a pressure regulating switch, the nozzle is connected to the water outlet of the water pump, the pressure regulating switch is connected to the input port of the controller, the first output end of the controller is connected to the driving motor M of the water pump, the controller controls the water output of the water pump according to the instruction of the pressure regulating switch, thereby forming different output water pressures at the nozzle, and is characterized in that: the driving motor M is an AC motor, the first output end is electrically connected to the power input end of the driving motor M, the controller adjusts the rotation speed of the driving motor M by controlling the input voltage of the driving motor M, thereby adjusting the water output of the water pump.

[0006] The controller described above is provided with a control program, which has several voltage gears preset, each voltage gear corresponds to a different output water pressure, and a row of pressure display lights are provided on the outer casing, each pressure display light is electrically connected to the second output end of the controller, and the pressure display light is used to display the output water pressure at the nozzle.

[0007] The above-mentioned voltage gears include several standard gears and several auxiliary gears, the standard gears are arranged between multiple auxiliary gears, the pressure regulating switch includes a pressurization switch, a pressure reduction switch and at least one main switch, the controller switches between the standard gears according to the instructions of the main switch, and the controller switches between the voltage gears in a preset order according to the instructions of the pressurization switch or the pressure reduction switch.

[0008] The number of the above-mentioned standard gears is three, namely the low pressure gear, the medium pressure gear and the high pressure gear, and the number of auxiliary gears is 12, among which four auxiliary gears are arranged between the low pressure gear and the medium pressure gear, and between the medium pressure gear and the high pressure gear.

[0009] The number of the main switches mentioned above is three, and each main switch corresponds to a standard gear position.

[0010] The above-mentioned controller includes a power supply module, a control chip and a voltage regulation module. The power supply module converts AC mains power into a low-voltage DC power supply. The low-voltage DC power supply supplies power to the control chip and the voltage regulation module. The input port of the control chip is electrically connected to the pressure regulating switch, and the output port of the control chip is electrically connected to the voltage regulation module. The output end of the voltage regulation module forms the first output end.

[0011] The voltage regulation module described above includes a bidirectional thyristor and an optocoupler isolation circuit. The output port of the control chip is connected to the control pin of the bidirectional thyristor through the optocoupler isolation circuit. The bidirectional thyristor is connected in series with the power input terminal of the drive motor and then connected to the mains input terminal.

[0012] The above-mentioned optocoupler isolation circuit includes a bidirectional optocoupler, a field effect transistor, a first resistor, a second resistor, a third resistor, a first capacitor and an amplifier sub-circuit. The anode of the input end of the bidirectional optocoupler is connected to the output port of the control chip through the amplifier sub-circuit, the cathode of the input end of the bidirectional optocoupler is connected to the drain of the field effect transistor, the source of the field effect transistor is grounded, and the gate of the field effect transistor is connected to the low-voltage DC power supply through the first resistor. The output end of the bidirectional optocoupler is divided into two paths, one path is connected to the control pin of the bidirectional thyristor, and the other path is connected to the first end of the bidirectional thyristor through the second resistor and the third resistor. The junction of the second resistor and the third resistor is connected to the second end of the bidirectional thyristor through the first capacitor.

[0013] The above-mentioned amplification sub-circuit includes a PNP transistor, a fourth resistor, a fifth resistor and a sixth resistor. The base of the PNP transistor is connected to the output port of the control chip through the fourth resistor, the base and emitter of the PNP transistor are connected through the fifth resistor, and the collector of the PNP transistor is connected to the anode of the input end of the bidirectional optocoupler through the sixth resistor.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The high-pressure cleaning machine comprises a water pump, a controller and a shell, the shell comprises a nozzle and a pressure regulating switch, the nozzle is connected to the water outlet of the water pump, the pressure regulating switch is connected to the input port of the controller, the first output end of the controller is connected to the driving motor M of the water pump, the controller controls the water output of the water pump according to the instruction of the pressure regulating switch, thereby forming different output water pressures at the nozzle, and is characterized in that: the driving motor M is an AC motor, the first output end is electrically connected to the power input end of the driving motor M, the controller adjusts the speed of the driving motor M by controlling the input voltage of the driving motor M, thereby adjusting the water output of the water pump; using a relatively large-power AC motor to drive the water pump makes the water pressure of the high-pressure cleaning machine greater and the cleaning effect better, the high-pressure cleaning machine has a larger adjustable output water pressure range, and the water output of the water pump is adjusted by adjusting the input voltage of the driving motor M, and the adjustment is quick, reliable and convenient.

[0016] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A circuit block diagram of a high pressure cleaning machine provided by an embodiment of the present invention;

[0018] Figure 2 This is the specific circuit diagram of the voltage regulation module of the high pressure cleaning machine. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 , Figure 2As shown, the present embodiment provides a high-pressure cleaning machine, including a water pump, a controller 1 and a shell, the shell including a nozzle and a pressure regulating switch 2, the nozzle is connected to the water outlet of the water pump, the pressure regulating switch 2 is connected to the input port of the controller 1, the first output end of the controller 1 is connected to the driving motor M of the water pump, the controller 1 controls the water output of the water pump according to the instruction of the pressure regulating switch 2, thereby forming different output water pressures at the nozzle, and is characterized in that: the driving motor M is an AC motor, the first output end is electrically connected to the power input end of the driving motor M, the controller 1 adjusts the speed of the driving motor M by controlling the input voltage of the driving motor M, thereby adjusting the water output of the water pump.

[0021] The high-pressure cleaning machine described in this embodiment uses a relatively high-power AC motor to drive the water pump, so that the water pressure of the high-pressure cleaning machine is greater and the cleaning effect is better. The adjustable output water pressure range of the high-pressure cleaning machine is larger, and the water output of the water pump is adjusted by adjusting the input voltage of the driving motor M. The adjustment is quick, reliable and convenient.

[0022] The controller 1 is provided with a control program, and the control program is preset with a number of voltage gears, each voltage gear corresponds to a different output water pressure, and a row of pressure display lights 3 are provided on the housing, each pressure display light 3 is electrically connected to the second output end of the controller 1, and the pressure display light 3 is used to display the output water pressure at the nozzle. In this embodiment, the water pressure is indicated by the number of lighted pressure display lights 3, that is, the higher the water pressure, the more lighted pressure display lights 3 are, so that the user can more intuitively understand the pressure changes of the high-pressure cleaning machine.

[0023] The voltage gears mentioned above include several standard gears and several auxiliary gears, and the standard gears are arranged at intervals between the multiple auxiliary gears. The pressure regulating switch 2 includes a pressurizing switch 21, a decompressing switch 22 and at least one main switch 23. The controller 1 switches between the standard gears according to the instructions of the main switch 23, and the controller 1 switches between the voltage gears in a preset order according to the instructions of the pressurizing switch 21 or the decompressing switch 22. The user can directly select each standard gear through the main switch 23, and can also switch to an adjacent gear on the basis of the selected gear through the pressurizing switch 21 or the decompressing switch 22, with a large number of gear options and simple and flexible selection.

[0024] The number of the above-mentioned standard gears is three, namely the low pressure gear, the medium pressure gear and the high pressure gear, and the number of auxiliary gears is 12, among which four auxiliary gears are arranged between the low pressure gear and the medium pressure gear, and between the medium pressure gear and the high pressure gear.

[0025] There are three main switches 23, each of which corresponds to a standard gear. Specifically, the main switch 23 includes a low-voltage gear switch 231, a medium-voltage gear switch 232, and a high-voltage gear switch 233. The high-voltage gear switch 231, the medium-voltage gear switch 232, and the low-voltage gear switch 233 correspond to the low-voltage gear, the medium-voltage gear, and the high-voltage gear, respectively.

[0026] The controller 1 includes a power module 11, a control chip U1 and a voltage regulating module 13. The power module 11 converts AC mains power into a low-voltage DC power supply VCC. The low-voltage DC power supply VCC supplies power to the control chip U1 and the voltage regulating module 13. The input port of the control chip U1 is electrically connected to the pressure regulating switch 2, and the output port of the control chip U1 is electrically connected to the voltage regulating module 13. The output end of the voltage regulating module 13 forms the first output end. The controller 1 has a simple structure and low production cost.

[0027] The second output end is a plurality of serial interfaces of the control chip U1 , and the plurality of pressure display lights 3 can be divided into a plurality of groups, and each group of pressure display lights 3 is connected to a serial interface.

[0028] The voltage regulating module 13 includes a bidirectional thyristor SCR and an optocoupler isolation circuit 131. The output port of the control chip U1 is connected to the control pin G of the bidirectional thyristor SCR through the optocoupler isolation circuit 131. The bidirectional thyristor SCR is connected in series with the power input terminal of the drive motor M and then connected to the mains input terminal. The power input terminal of the drive motor M is controlled by the bidirectional thyristor SCR, and the control is reliable.

[0029] The above-mentioned optocoupler isolation circuit 131 includes a bidirectional optocoupler U2, a field effect transistor MOS, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1 and an amplifier sub-circuit 132. The anode of the input end of the bidirectional optocoupler U2 is connected to the output port of the control chip U1 through the amplifier sub-circuit 132, the cathode of the input end of the bidirectional optocoupler U2 is connected to the drain of the field effect transistor MOS, the source of the field effect transistor MOS is grounded, and the gate of the field effect transistor MOS is connected to the low-voltage DC power supply VCC through the first resistor R1. The output end of the bidirectional optocoupler U2 is divided into two paths, one path is connected to the control pin G of the bidirectional thyristor SCR, and the other path is connected to the first end T1 of the bidirectional thyristor SCR through the second resistor R2 and the third resistor R3. The junction of the second resistor R2 and the third resistor R3 is connected to the second end T2 of the bidirectional thyristor SCR through the first capacitor C1.

[0030] The above-mentioned amplification sub-circuit 132 includes a PNP transistor P1, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6. The base of the PNP transistor P1 is connected to the output port of the control chip U1 through the fourth resistor R4, the base and emitter of the PNP transistor P1 are connected through the fifth resistor R5, and the collector of the PNP transistor P1 is connected to the input anode of the bidirectional optocoupler U2 through the sixth resistor R6.

[0031] A filter subcircuit 133 is further connected between the first terminal T1 and the second terminal T2 of the bidirectional thyristor SCR. The filter subcircuit is formed by a seventh resistor R7 and a second capacitor C2 connected in series.

[0032] The working process of the high pressure cleaning machine described in this embodiment is as follows:

[0033] The control chip U1 is provided with a control program, which divides the standard input voltage (hereinafter referred to as Vin) of the drive motor M into 15 gear voltages with a base of 2% decreasing, namely 1Vin, 0.98Vin, 0.96Vin, 0.94Vin, ... 0.74Vin, 0.72Vin. The control program presets 15 motor drive applets, as shown in Table 1, the 15 motor drive applets are arranged in order from 1 to 15, and each motor drive applet corresponds to 15 gear voltages from low to high. When the control program calls one of the motor drive applets with a sequence number, the controller will supply power to the drive motor M with the corresponding gear voltage to adjust the speed of the drive motor, and then adjust the water output of the water pump.

[0034]

[0035]

[0036] Table 1

[0037] like Figure 2 As shown, the controller described in this embodiment selects motor drive applets No. 3, No. 8 and No. 13 from 15 motor drive applets as "low power program", "medium power program" and "high power program", corresponding to low voltage gear, medium voltage gear and high voltage gear; when the user presses the high voltage gear switch 233, the medium voltage gear switch 232 or the low voltage gear switch 231, the control program calls the corresponding "high power program", "medium power program" or "low power program" to power the drive motor.

[0038] The control program also includes "add one small program" and "subtract one small program", which are used to call the program with adjacent serial numbers of the selected motor drive small program. For example, the No. 8 motor drive small program has been selected. When the user presses the pressure switch 21, the control program runs the "add one small program" to call and run the No. 9 motor drive small program; for another example, the No. 7 motor drive small program has been selected. When the user presses the pressure reduction switch 22, the control program moves the "subtract one small program" to call and run the No. 6 motor drive small program. At this time, the input voltage of the drive motor changes, so the motor speed changes, achieving the effect of regulating the water output of the water pump.

[0039] With the high-pressure cleaning machine described in this embodiment, the user can select different water pressure gears according to needs, and the high-pressure cleaning machine has multiple gears and convenient and reliable control.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure cleaning machine, comprising a water pump, a controller (1) and a housing, the housing comprising a nozzle and a pressure regulating switch (2), the nozzle being connected to a water outlet of the water pump, the pressure regulating switch (2) being connected to an input port of the controller (1), a first output end of the controller (1) being connected to a driving motor M of the water pump, the controller (1) controlling the water output of the water pump according to an instruction of the pressure regulating switch (2), thereby forming different output water pressures at the nozzle, characterized in that: The drive motor M is an AC motor, the first output end is electrically connected to the power input end of the drive motor M, and the controller (1) adjusts the speed of the drive motor M by controlling the input voltage of the drive motor M, thereby adjusting the water output of the water pump; The controller (1) comprises a power module (11), a control chip (U1) and a voltage regulating module (13); the power module (11) converts AC mains power into a low-voltage DC power supply VCC; the low-voltage DC power supply VCC supplies power to the control chip (U1) and the voltage regulating module (13); an input port of the control chip (U1) is electrically connected to the pressure regulating switch (2); an output port of the control chip (U1) is electrically connected to the voltage regulating module (13); and an output end of the voltage regulating module (13) forms the first output end. The voltage regulating module (13) comprises a bidirectional thyristor SCR and an optocoupler isolation circuit (131); the output port of the control chip (U1) is connected to the control pin G of the bidirectional thyristor SCR via the optocoupler isolation circuit (131); the bidirectional thyristor SCR is connected in series with the power input end of the drive motor M and then connected to the mains input end; The optocoupler isolation circuit (131) comprises a bidirectional optocoupler U2, a field effect transistor MOS, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1 and an amplifier subcircuit (132); the anode of the input end of the bidirectional optocoupler U2 is connected to the output port of the control chip (U1) through the amplifier subcircuit (132); the cathode of the input end of the bidirectional optocoupler U2 is connected to the drain of the field effect transistor MOS; the source of the field effect transistor MOS is grounded; the gate of the field effect transistor MOS is connected to the low-voltage DC power supply VCC through the first resistor R1; the output end of the bidirectional optocoupler U2 is divided into two paths, one path is connected to the control pin G of the bidirectional thyristor SCR; the other path is connected to the first end T1 of the bidirectional thyristor SCR through the second resistor R2 and the third resistor R3; the junction of the second resistor R2 and the third resistor R3 is connected to the second end T2 of the bidirectional thyristor SCR through the first capacitor C1.

2. A high pressure cleaning machine according to claim 1, characterized in that: The controller (1) is provided with a control program, the control program is preset with a plurality of voltage gears, each voltage gear corresponds to a different output water pressure, a row of pressure display lights (3) are provided on the outer shell, each pressure display light (3) is electrically connected to the second output end of the controller (1), and the pressure display light (3) is used to display the output water pressure at the nozzle.

3. A high pressure cleaning machine according to claim 2, characterized in that: The voltage gears include a plurality of standard gears and a plurality of auxiliary gears, the standard gears are arranged at intervals between the plurality of auxiliary gears, the pressure regulating switch (2) includes a pressurizing switch (21), a decompressing switch (22) and at least one main switch (23), the controller (1) switches between the standard gears according to an instruction of the main switch (23), and the controller (1) switches between the voltage gears in a preset order according to an instruction of the pressurizing switch (21) or the decompressing switch (22).

4. A high pressure cleaning machine according to claim 3, characterized in that: The number of standard gears is three, namely low pressure gear, medium pressure gear and high pressure gear. The number of auxiliary gears is 12, among which four auxiliary gears are respectively arranged between the low pressure gear and the medium pressure gear, and between the medium pressure gear and the high pressure gear.

5. A high pressure cleaning machine according to claim 4, characterized in that: The number of the main switches (23) is three, and each main switch (23) corresponds to a standard gear position.

6. A high pressure cleaning machine according to claim 1, characterized in that: The amplifying subcircuit (132) comprises a PNP transistor P1, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, the base of the PNP transistor P1 is connected to the output port of the control chip (U1) via the fourth resistor R4, the base and emitter of the PNP transistor P1 are connected via the fifth resistor R5, and the collector of the PNP transistor P1 is connected to the input anode of the bidirectional optical coupler U2 via the sixth resistor R6.

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