Pressure washer and method for identifying spray bar thereof

Patent metadata

Field	Value
Publication number	US-2018290179-A1
Application number	US-201615566478-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Dec 28, 2015
Publication date	Oct 11, 2018
Grant date	—

Abstract

A pressure washer and a method for recognizing a spray boom of the pressure washer. The pressure washer includes a housing, including a pump with a motor; a spray boom with a trigger member; and a control part, for recognizing the spray boom connected to the housing, and performing on and off control based on a recognition result or controlling the housing to convey a water flow of a corresponding pressure to the outside based on a recognition result. The pressure washer may be installed with spray booms of different models, so as to expand an applicable range of the pressure washer and improve flexibility of the pressure washer without changing the housing. Moreover, on and off control can be performed according to the recognition result, so as to prevent the housing from being started when no port accessory is mounted.

First claim

1 . A pressure washer, comprising:
a housing, comprising a pump used for conveying a water flow to the outside and a motor used for driving the pump to work; a spray boom, wherein the water flow sprays out from the spray boom; and wherein a control part, disposed in the housing, and used for recognizing a type of the spray boom, and controlling, according to the type of the spray boom, the pump to convey a water flow of a corresponding pressure to the outside.

2 . The pressure washer according to claim 1 , wherein the control part comprises a recognition module and a rotation rate control module, wherein the recognition module is used for recognizing the type of the spray boom and sending a signal to the rotation rate control module according to the recognition result; and the rotation rate control module controls a rotation rate of the motor according to the recognition result, so that the magnitude of an output water pressure of the pump is corresponding to the type of the spray boom.

3 . The pressure washer according to claim 2 , wherein a trigger member is optionally disposed on the spray boom, and the recognition module recognizes the trigger member so as to recognize the type of the spray boom.

4 . The pressure washer according to claim 3 , wherein the trigger member is a magnet or an induction coil, and the recognition module is a hall detection element used for detecting a magnetic field intensity of the magnet or the induction coil.

5 . The pressure washer according to claim 3 , wherein the trigger member comprises an ejection pin, the recognition module comprises a contact member, and when the spray boom is mounted on the housing, the ejection pin is capable of coming into contact with the contact member so as to trigger the recognition module to send a signal.

6 . The pressure washer according to claim 3 , wherein the spray boom comprises a high-pressure spray boom and a low-pressure spray boom that are capable of being mounted on the housing alternatively, the length of the high-pressure spray boom is greater than the length of the low-pressure spray boom, a first high-pressure trigger member is disposed on the high-pressure spray boom, no trigger member is disposed on the low-pressure spray boom, the recognition module is capable of recognizing the first high-pressure trigger member and sending a corresponding first signal to the rotation rate control module, and the rotation rate control module adjusts the rotation rate of the motor according to the first signal, so that the pump outputs a first output water pressure; and when recognition module sends a corresponding second signal to the rotation rate control module when detecting no trigger member, and the rotation rate control module adjusts the rotation rate of the motor according to the second signal, so that the pump outputs a second output water pressure, wherein the first output water pressure is greater than the second output water pressure.

7 . The pressure washer according to claim 3 , wherein information about the spray boom comprises the length of the spray boom, the spray boom comprises a high-pressure spray boom and a low-pressure spray boom that are capable of being mounted on the housing alternatively, the length of the high-pressure spray boom is greater than the length of the low-pressure spray boom, a first high-pressure trigger member is disposed on the high-pressure spray boom, a first low-pressure trigger member is disposed on the low-pressure spray boom, the recognition module is capable of recognizing the first high-pressure trigger member and sending a corresponding first signal to the rotation rate control module, and the rotation rate control module adjusts the rotation rate of the motor according to the first signal, so that the pump outputs a first output water pressure; and the recognition module is further capable of recognizing the first low-pressure trigger member and sending a corresponding second signal to the rotation rate control module, and the rotation rate control module adjusts the rotation rate of the motor according to the second signal, so that the pump outputs a second output water pressure, wherein the first output water pressure is greater than the second output water pressure.

8 . The pressure washer according to claim 2 , wherein the spray boom is retractable, the spray boom in a stretch state corresponds to the high-pressure spray boom, and the spray boom in a retraction state corresponds to the low-pressure spray boom.

9 . The pressure washer according to claim 8 , wherein the retractable spray boom comprises a first nozzle and a second nozzle, the inner diameter of the first nozzle is greater than the outer diameter of the second nozzle, and the second nozzle is retractably sleeved into the first nozzle.

10 . The pressure washer according to claim 3 , wherein when the recognition module does not detect the trigger member, the rotation rate control module controls the pump to be in an off state, and the output water pressure of the pump is 0.

11 . The pressure washer according to claim 3 , wherein the housing further comprises a control switch, and the control switch is electrically connected to one end of the motor, so as to control the working state of the motor.

12 . The pressure washer according to claim 11 , wherein the housing further comprises a switch unit connected between the rotation rate control module and the motor, the recognition module sends a switch-on forbidding signal to the rotation rate control module when not detecting the trigger member, and the rotation rate control module controls the switch unit according to the switch-on forbidding signal, so that the motor losses power, and the control switch is incapable of starting the pressure washer.

13 . The pressure washer according to claim 12 , wherein the switch unit comprises a field effect transistor, and the rotation rate control module controls on and off of the field effect transistor according to the switch-on forbidding signal.

14 . The pressure washer according to claim 13 , wherein the switch unit further comprises a driver module connected between the field effect transistor and the rotation rate control module, and the control module turns on or turns off the field effect transistor by means of the driver module.

15 . The pressure washer according to claim 1 , wherein the form of the housing is set to a hand-held gun type.

16 . A method for recognizing a spray boom of a pressure washer, comprising the following steps:
recognizing a spray boom; sending a corresponding signal according to a recognition result; and receiving the signal and controlling, according to the signal, conveying of a water flow of a corresponding pressure to the outside.

17 . The method for recognizing a spray boom according to claim 16 , wherein the method for recognizing a spray boom of a pressure washer further comprises the following steps: when the spray boom is not detected, sending a switch-on forbidding signal representing that the spray boom is not detected.

18 . A pressure washer, comprising:
a housing, comprising a pump used for conveying a water flow to the outside and a motor used for driving the pump to work; a port accessory, mounted onto the housing; and a control part, disposed in the housing, wherein the control part is capable of recognizing different port accessories and change, based on a recognition result, the pressure of a water flow that is conveyed to the outside.

19 . The pressure washer according to claim 18 , wherein a trigger me

Assignees

• Positec Power Tools Suzhou Co Ltd

Inventors

• Qiao Yong
• Wu Pinghua
• Sun Yunhong
• Huang Wenjin

Classifications

• F04B49/06

  Control using electricity (regulating by means of floats actuating electric switches F04B49/04) · CPC title

• B08B13/00

  Accessories or details of general applicability for machines or apparatus for cleaning · CPC title

• B08B2203/027

  Pump details · CPC title

• B08B3/02 Primary

  Cleaning by the force of jets or sprays · CPC title

• F04B2203/0209

  Rotational speed · CPC title