JP2008240736A - Pump idling prevention mechanism for high pressure washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump idling prevention mechanism for a high pressure washing machine in which a stop device receives water shortage signal and stops a drive device to prevent idling of a high pressure pump even if a strainer is clogged with foreign matter and supply of water to the high pressure pump gets insufficient, and in which an engine is cooled with a time not exerting bad influence of idling on the high pressure pump when the engine is stopped. <P>SOLUTION: The pump idling prevention mechanism for the high pressure washing machine is provided with a high pressure gun 1, the high pressure pump 2 having the high pressure gun 1 connected thereto by a high pressure hose 3, the engine 4 for driving the high pressure pump 2, a sensor 9 existing at a water suction side of the high pressure pump 2 and capturing a water shortage condition of a water suction port 2a, the stop device 10 receiving the water shortage signal from the sensor 9 and stopping the engine 4, and a first timer providing dozens of second of time lag until stop of the engine 4 after the sensor 9 captures the water shortage condition. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mechanism for preventing idling of a high-pressure pump in a high-pressure washing machine.

  Conventionally, this type of high-pressure pump is based on the use of fresh water because water that contains foreign matter such as muddy water can cause failure throughout the high-pressure washing machine.

  Therefore, the present situation is that a fine strainer is installed on the water absorption side of the high-pressure pump to prevent foreign matter from entering the high-pressure pump.

  When the water source of the high-pressure pump becomes zero, the high-pressure pump is stopped by manual operation.

  The problem to be solved is that the strainer can reduce the contamination of the high-pressure pump, but the fine strainer is clogged with foreign matter and the water supply to the high-pressure pump becomes insufficient. If you forget to stop the pump, the high-pressure pump will run idle, causing partial wear and damage to the high-pressure pump.

  According to the present invention, there is provided a high-pressure gun, a high-pressure pump to which the high-pressure gun is connected by a high-pressure hose, an engine for driving the high-pressure pump, and a water absorption of the high-pressure pump. A sensor for detecting the drought state of the water intake port on the side, a stop device for stopping the engine in response to a drought signal from the sensor, and before the engine is stopped after the sensor detects the drought state A first timer providing a time lag for several tens of seconds.

  In addition, another pump high-pressure washing prevention mechanism of the present invention includes a high-pressure gun, a high-pressure pump to which the high-pressure gun is connected by a high-pressure hose, an engine for driving the high-pressure pump, and the high-pressure pump. A sensor on the water intake side of the pump for detecting the drought state of the water inlet, and a stop device for stopping the engine in response to a drought signal from the sensor, when the stop device stops the engine , Supply the OFF state to the contact for several seconds.

  In the high-pressure washing machine pump prevention mechanism according to the present invention, a sensor provided on the water suction side of the high-pressure pump can stop the engine serving as a driving device by detecting the drought state of the water suction port. Even if the water supply to the high-pressure pump becomes insufficient due to clogging, even if you forget to stop the high-pressure pump with zero water source, the stop device receives the drought signal and stops the engine that becomes the drive device Therefore, it is possible to prevent the high-pressure pump from being idle and to prevent partial wear and damage to the high-pressure pump due to the idle operation. In addition, by providing a time lag for several tens of seconds before the engine is stopped after the sensor detects a drought, the high-pressure pump cools the engine in a time that is not adversely affected by idling. be able to. In addition, the pump empty operation prevention mechanism of another high-pressure washing machine of the present invention can stop the engine serving as a driving device by catching the drought state of the water suction port by a sensor provided on the water suction side of the high pressure pump. Even if the strainer is clogged with foreign matter and water supply to the high-pressure pump is insufficient, even if you forget to stop the high-pressure pump when the water source is zero, the stop device will stop the engine in response to a drought signal Can prevent idling of the high pressure pump, prevent partial wear and damage to the high pressure pump due to idling, and stop the engine by supplying an OFF state to the contact for several seconds when stopping the engine. I can do it.

  This was realized by providing a sensor on the water absorption side of the high-pressure pump, sending a drought signal to the stop device by using this sensor to detect the drought state of the water inlet, and stopping the drive device by this stop device.

  An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram schematically showing the entire mechanism.

  In FIG. 1, 1 is a high-pressure gun, 2 is a high-pressure pump to which the high-pressure gun 1 is connected by a high-pressure hose 3, 4 is an engine for driving the high-pressure pump 2, 5 is a water storage tank, and 6 is a water inlet of the high-pressure pump 2. A water suction hose connected to 2a, 7 is a fine strainer of the water suction hose 6, 8 is a spillage hose connected to the high pressure pump 2, and 9 is a sensor on the water suction side of the high pressure pump 2 to detect the drought state of the water suction port 2a. Reference numeral 10 denotes a stop device for stopping the engine 4, and a timer 12 for canceling the drought signal from the sensor 9 for several seconds in order to enable the start of the engine 4 when the sensor 9 is connected by the cord 11 and the engine 4 is started. It has.

  The engine 4 has a power generation coil specification (including a lighting coil and a charging coil specification), and operates and stops the stop device 10 using electricity supplied thereby, and also serves as a power source for the sensor 9. It can be used.

  As soon as the engine 4 is started, a drought signal is input from the sensor 9 to the stop device 10, but the timer 12 is activated to cancel this drought signal for several seconds (the time for bleeding the high-pressure pump 2). The high pressure pump 2 continues to rotate. Thereafter, the high-pressure gun 1 is operated to perform a cleaning operation.

  If the strainer 7 becomes clogged and the supply of water to the high-pressure pump 2 becomes insufficient, or the water storage tank 5 becomes empty and the high-pressure pump 2 stops absorbing water, the drought state at the water inlet 2a of the high-pressure pump 2 Since the sensor 9 captures and outputs a drought signal, the stop device 10 operates in response to the drought signal to stop the engine 4. Therefore, idling of the high pressure pump 2 is prevented.

  In the above embodiment, when the engine 4 is stopped, the time lag from when the sensor 9 operates until the engine 4 stops is several tens of seconds by a timer (not shown) (the engine 4 is cooled and the high-pressure pump 2 is turned on). It is necessary to provide a time that is not adversely affected by idle driving). At that time, in order to electrically stop the engine 4 by the stop device 10, the engine 4 cannot be stopped even if the engine stop switch is instantaneously turned off, so it is necessary to provide an off state at the contact for several seconds.

  In the above embodiment, the water source is not limited to the water storage tank 5, and the high-pressure washing machine may be either portable or installation type.

  Another embodiment of the present invention will be described with reference to FIG. FIG. 2 is a diagram schematically showing the entire mechanism. In FIG. 2, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 2, reference numeral 13 denotes a motor for driving the high-pressure pump 2, and reference numeral 14 denotes a power source for the motor 13, which includes an on / off switch (not shown) with a timer 12.

  When the power supply 14 is switched on and the motor 13 is started, a drought signal is immediately input from the sensor 9 to the power supply 14, but the timer 12 is activated to cancel this drought signal for several seconds (the time for bleeding the high-pressure pump 2). Therefore, the power supply 14 is not switched off, and the motor 13 continues to drive and the high-pressure pump 2 rotates. Thereafter, the high-pressure gun 1 is operated to perform a cleaning operation.

  If the strainer 7 becomes clogged and the supply of water to the high-pressure pump 2 becomes insufficient, or the water storage tank 5 becomes empty and the high-pressure pump 2 stops absorbing water, the drought state at the water inlet 2a of the high-pressure pump 2 Since the sensor 9 captures and outputs a drought signal, the power supply 14 is switched off in response to the drought signal and the motor 13 is stopped. Therefore, idling of the high pressure pump 2 is prevented.

  In the present embodiment, a water storage tank 15 is provided in the present apparatus as compared with the second embodiment, and the high pressure pump 2 and the motor 13 are set to the water storage tank 15 as shown in FIG. Although not shown, the water inlet 2a of the high-pressure pump 2 includes a water source switching unit.

  When the water storage tank 15 is provided as described above, the water source can be freely switched between the water storage tank 15 and the water storage tank 5 by the switching operation of the water source switching unit. Therefore, it is possible to start with the urgent water storage tank 15 at the beginning and to work even in a place where there is no water source.

  In any case, it is a matter of course that the operation of the sensor 9 prevents the high-pressure pump 2 from idling due to the empty water storage tank 15 and water storage tank 5.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as a mechanism for preventing empty operation of a high pressure pump in a high pressure washer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram schematically illustrating an entire mechanism according to a first embodiment of the present invention. Example 2 of the present invention is shown and is a diagram schematically showing the whole mechanism. Example 3 of the present invention is shown and is a diagram schematically showing the entire mechanism.

Explanation of symbols

1: High pressure gun 2: High pressure pump 2a: Water intake port 3: High pressure hose 4: Engine 5: Water tank 6: Water absorption hose 7: Strainer 8: Waste water hose 9: Sensor 10: Stop device 11: Code 12: Timer 13: Motor 14: Power supply 15: Water storage tank

Claims (4)

A high-pressure gun,
A high pressure pump to which the high pressure gun is connected by a high pressure hose;
An engine for driving the high-pressure pump;
A sensor on the water absorption side of the high-pressure pump that captures the drought state of the water inlet;
A stop device for stopping the engine in response to a drought signal from the sensor;
And a first timer that provides a time lag for several tens of seconds before the engine is stopped after the sensor detects a drought condition. A high-pressure gun,
A high pressure pump to which the high pressure gun is connected by a high pressure hose;
An engine for driving the high-pressure pump;
A sensor on the water absorption side of the high-pressure pump that captures the drought state of the water inlet;
A stop device for stopping the engine in response to a drought signal from the sensor,
When the stop device stops the engine, an OFF state is supplied to the contact point for several seconds. The pump idle operation prevention mechanism of the high pressure washer according to claim 1 or 2, further comprising a second timer in the stopping device for canceling the drought signal for several seconds. The pump idle operation prevention mechanism of the high-pressure washing machine according to any one of claims 1 to 3, wherein the stop device and the sensor are operated using electricity supplied to the engine.

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