JP5388151B2 - Cleaning liquid supply device - Google Patents

Description

  The present invention relates to a cleaning liquid supply apparatus that uses tap water, well water, or the like to add a chemical liquid to increase the sterilization and deodorizing effects, and pressurizes the cleaning liquid with a high-pressure pump.

  In recent years, many high-rise apartment buildings have been built in urban areas and their suburbs from the viewpoint of effective use of land. The domestic wastewater (sewage) discharged from this building-type apartment will be discharged from the dedicated drain pipe installed in the individual house to the external horizontal pipe through the common drain pipe provided inside the building. Thus, a good living environment is maintained.

  By the way, since the above-mentioned domestic wastewater contains a large amount of residue and fats and oils, it adheres firmly to the tube wall of the drainage pipe as a solid substance, causing pathogens and the emission of malodors. The living environment is significantly deteriorated. Moreover, since the solid matter etc. which adhered to the pipe wall sometimes clogs the drainage pipe, it is necessary to clean the dedicated drainage pipe and the common drainage pipe at regular intervals.

As described above, various powerful cleaning methods have been proposed in order to remove the solid matter attached to the drain pipe, and one of them is a high-pressure water jet cleaning method.
In this high-pressure water jet cleaning method, a bendable hose with a high-pressure water injection nozzle attached to the tip is inserted into the drain pipe, and the high-pressure pump supplies the cleaning water to the hose and injects the cleaning water from the nozzle. The operation of moving forward in the drain pipe is performed. Thereby, the solid substance etc. which adhered to the inside of the drain pipe with the injection pressure of the washing water from the high pressure water injection nozzle can be crushed or peeled off.

  The above-mentioned high-pressure water jet cleaning method in the drain pipe and the high-pressure water jet nozzle used therefor have already been proposed by the present applicant, which is disclosed in Patent Document 1 and Patent Document 2 and the like. Yes.

  On the other hand, recently, a proposal has been made to add a chemical solution for improving the sterilizing and deodorizing effects for the washing water used for washing the drain pipe as described above. For example, inorganic alkali such as sodium hypochlorite is proposed. It has also been proposed to use a preparation or a washing liquid by adding an inorganic acid such as hydrochloric acid in addition to this. This is disclosed in Patent Document 3 and the like.

JP 2002-275984 A JP 2008-163644 A JP 2010-150319 A

  By the way, the above-described cleaning liquid is temporarily stored in a cleaning liquid storage tank provided in the cleaning liquid supply device, and is pressurized by a high pressure pump driven by engine power of an internal combustion engine and discharged from an injection nozzle. The cleaning liquid supply device is set to have the capability of supplying cleaning liquid to, for example, about three injection nozzles at the same time. In this case, depending on the progress of each work, the cleaning liquid may be discharged simultaneously from the three spray nozzles, and the cleaning liquid may not be discharged from any of the spray nozzles.

As described above, the amount of the high-pressure cleaning liquid delivered from the high-pressure pump side changes every moment depending on the discharge state of the cleaning liquid from each spray nozzle and the difference in the discharge amount of the cleaning liquid from each spray nozzle. In addition, it is necessary to maintain a certain discharge pressure of the cleaning liquid in the high-pressure pump regardless of the discharge amount of the cleaning liquid.
Accordingly, in the cleaning liquid delivery unit, a spillway pipe is generally formed so that the residual water of the cleaning liquid pressurized by the high-pressure pump is returned to the storage tank.

  Therefore, when the cleaning liquid is discharged from a small number of injection nozzles or when no cleaning liquid is discharged from any of the injection nozzles during the operation of the cleaning liquid delivery unit, the cleaning liquid pressurized by the high-pressure pump is not used. Most or all of the amount is returned to the cleaning liquid storage tank. That is, the cleaning liquid circulates between the high-pressure pump and the cleaning liquid storage tank through the spillway pipe.

  In this case, when the cleaning liquid passes through the high-pressure pump, it receives high-pressure energy due to compression, and thus its temperature rises. Although the problem does not occur if the cleaning liquid whose temperature has risen is constantly discharged from the above-described injection nozzle, as described above, when the amount of the cleaning liquid that returns from the high-pressure pump to the cleaning liquid storage tank via the spillway pipe increases, The temperature of the cleaning liquid in the cleaning liquid storage tank rises due to heat storage.

  When the temperature of the cleaning liquid rises in this way, a dangerous problem such as an operator inadvertently receiving the cleaning liquid during a cleaning operation and causing a burn is also caused. In addition, as described above, in order to enhance the sterilization and deodorizing effect, for example, when using a chemical solution such as sodium hypochlorite or hydrochloric acid as a cleaning solution to tap water, the temperature of the cleaning solution increases. In addition, the degree of generation of chlorine gas and the like increases, and problems such as worsening the working environment are also invited.

  The present invention has been made paying attention to the above-described problems, and in the cleaning liquid delivery unit configured to deliver the cleaning liquid by a high-pressure pump, the above-described remaining water channel regardless of the discharge amount of the cleaning liquid from the injection nozzle. It is an object of the present invention to provide a cleaning liquid supply device that can suppress an increase in the temperature of the cleaning liquid in the cleaning liquid storage tank by adopting a control unit that minimizes the amount of the cleaning liquid that returns to the cleaning liquid storage tank via the pipe. To do.

  Further, in addition to the above-described effects, the present invention, in the cleaning liquid generation unit that generates the cleaning liquid by adding the chemical liquid to the cleaning water, ensures the accurate management of the addition amount of the chemical liquid by using the dilution mixing tank, It is an object of the present invention to provide a cleaning liquid supply device capable of obtaining cleaning water having a stable concentration of chemical liquid.

  The cleaning liquid supply device according to the present invention made to solve the above-described problems includes a cleaning liquid storage tank that temporarily stores the cleaning liquid, and a high-pressure pump that pressurizes and supplies the cleaning liquid from the cleaning liquid storage tank to a high pressure. A discharge path for discharging a high-pressure cleaning liquid pressurized by the high-pressure pump, and an engine by an internal combustion engine that rotationally drives the high-pressure pump; and an engine controller that executes rotation speed control of the engine; and the high-pressure pump A cleaning liquid supply device provided with a residual water path for returning residual water in the high pressure cleaning liquid from the high pressure pump into the cleaning liquid storage tank, depending on the flow rate of the cleaning liquid going from the high pressure pump to the discharge path of the high pressure cleaning liquid The engine controller executes control for increasing or decreasing the rotational speed of the engine.

  In this case, a cleaning liquid is introduced, and a chemical dilution dilution tank is provided that generates a cleaning liquid by adding and mixing the chemical to the cleaning water. From the chemical dilution mixing tank to the cleaning liquid storage tank It is desirable that the cleaning liquid is sent.

  In addition, a pH sensor for measuring the pH value of the cleaning liquid in the mixing tank is disposed in the chemical liquid dilution mixing tank, and is added to the chemical liquid dilution mixing tank based on the pH value obtained by the pH sensor. The amount of the chemical solution to be added is controlled.

  In a preferred embodiment, a float sensor that detects the amount of the cleaning liquid in the cleaning liquid storage tank, and the cleaning water supplied to the chemical dilution dilution tank based on the detection information of the liquid amount by the float sensor. A water supply valve for controlling the amount, and when the detected value of the liquid amount by the float sensor reaches a predetermined value, control for stopping the water supply into the chemical liquid dilution mixing tank by the water supply valve is executed Configured as follows.

  More preferably, a liquid temperature sensor for measuring the temperature of the cleaning liquid in the cleaning liquid storage tank is provided, and when the liquid temperature increase is detected by the liquid temperature sensor above a predetermined value, the chemical dilution dilution tank by the water supply valve The amount of water supplied to the inside is increased so that the cleaning liquid in the cleaning liquid storage tank can be discharged as blow water.

  In this case, in contrast to the control for stopping the water supply by the water supply valve based on the liquid amount detection information by the float sensor, the control for increasing the water supply amount by the water supply valve based on the liquid temperature detection information by the liquid temperature sensor is performed. Configured to run preferentially.

  According to the cleaning liquid supply apparatus of the present invention, control is performed to increase or decrease the rotational speed of the engine that rotationally drives the high pressure pump in accordance with the flow rate of the cleaning liquid traveling from the high pressure pump to the high pressure cleaning liquid discharge path. Since it is comprised, the quantity of the residual water returned to the washing | cleaning liquid storage tank from the said high pressure pump through a residual water channel can be decreased as much as possible.

According to this, it is possible to effectively suppress an increase in temperature of the cleaning liquid in the storage tank by returning the remaining water in a state where the liquid temperature is increased in the high-pressure pump and returning to the cleaning liquid storage tank. it can.
Therefore, the increase in the temperature of the cleaning liquid in the storage tank can eliminate dangerous problems on workers, and for example, the generation of chlorine gas due to the increase in temperature of the cleaning liquid to which the chemical liquid has been added. The problem can be solved.

Further, according to the cleaning liquid supply apparatus according to the present invention, the chemical liquid dilution mixing tank is provided, and in this chemical liquid dilution mixing tank, the chemical liquid is added to the cleaning water from, for example, tap water, and the cleaning liquid is generated. It is sent to the cleaning liquid storage tank.
A pH sensor for measuring the pH value of the cleaning liquid in the chemical liquid dilution mixing tank is disposed, and the amount of the chemical liquid added to the chemical liquid dilution mixing tank is determined based on the pH value obtained by the pH sensor. Acts to be controlled. Therefore, accurate control of the amount of chemical solution added is ensured, and it becomes possible to obtain wash water with a stable concentration of the chemical solution.

  Furthermore, a float sensor that detects the amount of the cleaning liquid in the cleaning liquid storage tank described above and a liquid temperature sensor that measures the temperature of the cleaning liquid are provided, and is injected into the cleaning liquid storage tank using the float sensor. The level of the cleaning liquid is controlled. Thereby, an appropriate water-saving effect can be achieved.

  In addition, the liquid temperature sensor monitors the temperature of the cleaning liquid in the cleaning liquid storage tank, and when the cleaning liquid is heated to a predetermined temperature or more, the amount of cleaning water injected from the water supply or the like is increased to increase the amount of the cleaning liquid in the cleaning liquid storage tank. Acts so that the cleaning liquid can be actively discharged as blow water. By this operation, it becomes possible to reliably reduce the temperature of the cleaning liquid in the cleaning liquid storage tank, and even when the temperature management of the cleaning liquid in the storage tank is unsatisfactory by controlling the rotational speed of the engine that drives the high-pressure pump described above, Safety can be ensured by the above-described discharge operation of the blow water.

In the cleaning liquid supply apparatus according to the present invention, it is a schematic diagram mainly showing a configuration of a cleaning liquid generating unit. Similarly, in the cleaning liquid supply apparatus, it is a schematic view mainly showing the configuration of a cleaning liquid delivery unit. It is a side view which shows the example which mounted the housing | casing which accommodated the washing | cleaning-liquid supply apparatus which concerns on this invention in the vehicle. It is the rear view of the state which looked at the housing | casing from the back side of the vehicle similarly. It is the perspective view of the state which looked at the housing | casing mounted in the vehicle from the upper surface. It is the perspective view of the state which looked at the housing | casing from the back similarly.

Hereinafter, a cleaning liquid supply apparatus according to the present invention will be described based on an embodiment shown in the drawings. This cleaning liquid supply apparatus is roughly composed of a cleaning liquid generation unit U1 shown in FIG. 1 and a cleaning liquid delivery unit U2 shown in FIG. 2. In FIGS. 1 and 2, a cleaning liquid storage tank denoted by reference numeral T2 is shown in common. Has been.
That is, the upstream side of the cleaning liquid storage tank T2 constitutes the cleaning liquid generation unit U1, and the downstream side of the cleaning liquid storage tank T2 constitutes the cleaning liquid delivery unit U2.

The cleaning liquid generation unit shown in FIG. 1 has a function of generating a cleaning liquid by adding a chemical liquid to, for example, cleaning water supplied from a tap water, and sending this cleaning liquid to the above-described cleaning liquid storage tank U2.
In FIG. 1, reference numeral 1 denotes a water tap provided with an operation lever. The water tap 1 is opened when the cleaning liquid supply device is in operation. An electromagnetic valve 2 that is controlled to be opened and closed by an actuator such as a motor is connected to the water tap 1, and a flow rate sensor 3 is connected to the downstream side of the electromagnetic valve 2. The flow rate sensor 3 is connected to a water amount adjusting valve 4 having an operation lever, and the wash water from the water supply that has passed through the water amount adjusting valve 4 is supplied to the chemical dilution dilution tank T1.

On the other hand, chemical liquid storage tanks 6 and 7 are arranged in the cleaning liquid generation unit U1 to be added and diluted with respect to the cleaning water supplied to the chemical liquid dilution mixing tank T1. As an example, sodium hypochlorite and hydrochloric acid are respectively stored in the chemical liquid storage tanks 6 and 7. The chemical liquids stored in the storage tanks 6 and 7 are driven by the chemical liquid delivery pumps 8 and 9. It is added into the chemical solution dilution mixing tank T1, diluted with the wash water supplied from the tap water, and generated as a wash solution.
And the cleaning liquid produced | generated in this chemical | medical solution dilution mixing tank T1 is comprised so that it may send with respect to above-described cleaning liquid storage tank T2.

A pH sensor 11 is disposed in the chemical liquid dilution mixing tank T1, and the pH value of the cleaning liquid in the chemical liquid dilution mixing tank T1 is measured by the pH sensor 11.
In this embodiment, the pH value of the cleaning liquid in the mixing tank T1 is managed to be 6.5. That is, the measured value by the pH sensor 11 is transmitted to the pH controller 12, and a control signal is transmitted from the pH controller 12 to the relay device 13.

  The relay device 13 is also configured to be supplied with a flow rate detection signal from the flow rate sensor 3, and the relay device 13 detects a control signal from the pH controller 12 and a flow rate detection from the flow rate sensor 3. In response to the signal, the drive currents from the pump drive power supplies 14 and 15 provided corresponding to the chemical solution delivery pumps 8 and 9 are turned on or off.

As a result, the chemical solution delivery pumps 8 and 9 operate individually and intermittently, and the chemical solutions respectively stored in the chemical solution storage tanks 6 and 7 are appropriately added into the chemical solution dilution mixing tank T1. As a result, the pH value of the cleaning liquid in the tank T1 is adjusted to the controlled value.
Accordingly, the cleaning liquid transferred from the chemical liquid dilution mixing tank T1 to the cleaning liquid storage tank T2 is sent as cleaning water in which the pH value is accurately managed and the concentration of the chemical liquid is stable.

In the cleaning liquid storage tank T2, a float sensor 17 for detecting the amount of cleaning liquid in the cleaning liquid storage tank T2 is disposed. The float sensor 17 operates to send a detection signal to the water-saving controller 19 when the cleaning liquid stored in the cleaning liquid storage tank T2 is full or close to the state.
The water-saving controller 19 that receives the detection signal from the float sensor 17 sends a control signal to the electromagnetic valve 2 as a water supply valve, and closes the electromagnetic valve 2 to stop water supply into the chemical solution dilution mixing tank T1. Execute.

  As a result, the supply of the cleaning liquid from the chemical liquid dilution mixing tank T1 to the cleaning liquid storage tank T2 is stopped. That is, the float sensor 17 and the water saving controller 19 can appropriately manage the amount of the cleaning liquid stored in the cleaning liquid storage tank T2 and contribute to saving the cleaning water from the water supply supplied to the chemical liquid dilution mixing tank T1. .

The cleaning liquid storage tank T2 is further provided with a liquid temperature sensor 18 for measuring the temperature of the cleaning liquid in the cleaning liquid storage tank T2, and the measurement value by the liquid temperature sensor 18 is sent to the water saving controller 19 described above. It is configured.
That is, when the liquid temperature sensor 18 detects an increase in liquid temperature that is equal to or higher than a predetermined value, the water-saving controller 19 sends a control signal to the electromagnetic valve 2 as a water supply valve, and opens the electromagnetic valve 2. Then, control is performed to increase the amount of water supplied into the chemical liquid dilution mixing tank T1.

  As a result, the amount of cleaning liquid sent from the chemical liquid dilution mixing tank T1 to the cleaning liquid storage tank T2 increases, and the cleaning liquid in the cleaning liquid storage tank T2 is discharged as blow water 20. Accordingly, the temperature of the cleaning liquid in the cleaning liquid storage tank T2 is lowered, and the liquid temperature sensor 18 detects a temperature drop to a predetermined value, thereby closing the electromagnetic valve 2 as a water supply valve or controlling the amount of water flow. Made.

The temperature rise of the cleaning liquid in the cleaning liquid storage tank T2 is caused by a large amount of the cleaning liquid heated by the high-pressure pump returning to the cleaning liquid storage tank T2 through the spillway in the cleaning liquid delivery unit U2 described later. It is.
In the cleaning liquid delivery unit U2, which will be described later, means for suppressing the temperature rise of the cleaning liquid in the cleaning liquid storage tank T2 is provided. By discharging the cleaning liquid in the cleaning liquid storage tank T2 as blow water 20, the cleaning liquid is discharged. The means for suppressing the temperature rise is used as an emergency means.

  In contrast to the control for stopping the water supply by the water supply valve (electromagnetic valve 2) based on the detection information of the liquid amount by the float sensor 17, the water supply valve (electromagnetic) based on the detection of the liquid temperature rise by the liquid temperature sensor 18. The control for increasing the water supply amount by opening the valve 2) is preferentially executed.

  Next, the cleaning liquid delivery unit U2 shown in FIG. 2 has a function of sending the cleaning liquid in the above-described cleaning liquid storage tank T2 to a high pressure using a high pressure pump. In FIG. 2, reference numeral 22 denotes the above-described high-pressure pump. The high-pressure pump 22 is driven by receiving a rotational driving force of the engine 23 by an internal combustion engine such as a diesel engine.

  The high-pressure pump 22 includes a suction path 22 a for sucking the cleaning liquid in the cleaning liquid storage tank T 2, a discharge path 22 b for discharging the high-pressure cleaning liquid pressurized by the high-pressure pump 22, and a high-pressure cleaning liquid from the high-pressure pump 22. A spillway 22c for returning the spilled water to the cleaning liquid storage tank T2 is provided.

The high-pressure pump 22 is provided with a pressure sensor 24 for measuring the pressurizing force in the high-pressure pump 22, and the engine 23 is provided with a rotation sensor 25 for measuring the rotational speed of the engine 23.
The output signals of the pressure sensor 24 and the rotation sensor 25 are configured to be supplied to the engine controller 27.

On the other hand, a flow switch 28 is disposed in the discharge path 22 b for discharging the high-pressure cleaning liquid in the high-pressure pump 22, and a discharge valve 29 having an operation lever is connected via the flow switch 28. The discharge valve 29 is connected to a cleaning liquid spray nozzle (not shown) via a bendable hose.
The flow switch 28 has a function of detecting whether or not the cleaning liquid is flowing through the discharge passage 22b, and the information is supplied to the engine controller 27 described above.

  FIG. 2 shows a state in which one discharge valve 29 is connected to the flow switch 28. However, when using a plurality of cleaning liquid injection nozzles, The discharge valves 29 corresponding to the injection nozzles are connected in parallel.

  In addition, an electromagnetic valve 31 that is controlled to open and close by an actuator such as a motor is connected to the residual water passage 22c that returns the residual water in the high-pressure cleaning liquid from the high-pressure pump 22 into the cleaning liquid storage tank T2. A pressure regulating valve 32 is connected in parallel with 31.

  As described above, detection information from the pressure sensor 24, the rotation sensor 25, and the flow switch 28 is supplied to the engine controller 27. The engine controller 27 is attached to the engine 23 and is connected to the engine. A control signal is supplied to a throttle control unit 33 that controls the rotational speed of 23. The engine controller 27 also supplies a control signal to the electromagnetic valve 31 disposed in the spillway 22c.

In the cleaning liquid delivery unit U2 shown in FIG. 2 having the above configuration, detection information from the flow switch 28 arranged in the discharge path 22b of the high-pressure cleaning liquid, that is, information on the presence or absence of the flow of the cleaning liquid in the discharge path 22b. It is supplied to the engine controller 27.
When there is no flow of cleaning liquid in the discharge passage 22b, the high-pressure cleaning liquid is not used. In this case, the engine controller 27 is in an idling state with respect to the throttle control unit 33. A signal to be controlled is sent out.

  At the same time, the engine controller 27 sends a signal for controlling the solenoid valve 31 to open. Accordingly, the pressure of the high-pressure pump 22 is not applied to the cleaning liquid that returns to the cleaning liquid storage tank T2 via the spillway 22c, and the temperature of the cleaning liquid that returns to the storage tank T2 does not increase.

On the other hand, when high-pressure cleaning liquid is used and the flow switch 28 detects the flow of cleaning liquid in the discharge passage 22b, the engine controller 27 instructs the throttle controller 33 to increase the rotation of the engine 23. Is sent out.
In this case, the number of revolutions of the engine 23 is controlled so that the discharge pressure of the cleaning liquid can be set manually in the engine controller 27 and the discharge pressure of the cleaning liquid is set manually, for example, 20 MPa.

This is because the rotation speed control of the engine 23 is performed so that the pressure information from the pressure sensor 24 provided in the high-pressure pump 22 is fed back to the engine controller 27 so that the set discharge pressure is obtained. .
At the same time, the engine controller 27 sends a signal for controlling the solenoid valve 31 to be in a closed state, and the residual water from the high pressure pump 22 passes through the pressure regulating valve 32 and the residual water passage 22c. It will be returned to the storage tank T2.

Here, when the number of high-pressure water jet nozzles used for the cleaning operation increases, for example, the flow rate of the cleaning liquid in the discharge passage 22b increases, and the pressure by the pressure sensor 24 provided in the high-pressure pump 22 increases. The measured value will decrease.
The decrease in the pressure measurement value by the pressure sensor 24 is fed back to the engine controller 27 as described above, and control is performed to increase the rotational speed of the engine 23 so that the discharge pressure of the cleaning liquid becomes a preset value. .

  On the contrary, when the number of high-pressure water jet nozzles used is reduced, the pressure measurement value by the pressure sensor 24 provided in the high-pressure pump 22 will increase, and this pressure measurement value will be Feedback is sent to the engine controller 27, and control is performed to decrease the rotational speed of the engine 23 so that the discharge pressure of the cleaning liquid becomes a preset value.

  The output signal of the rotation sensor 25 provided in the engine 23 is supplied to the engine controller 27 as described above. This acts to send a control signal for maintaining the idling state to the throttle control unit 33 when the engine 23 reaches a state lower than a set idling state due to several factors.

  In addition, when the engine 23 reaches, for example, a set rotational speed or more due to several factors, the throttle controller 33 operates to send a control signal for reducing the engine rotational speed. Thereby, the stability of the rotational speed control of the engine 23 can be ensured.

  Thus, as described above, the pressure sensor 24 detects the flow rate of the cleaning liquid flowing from the high-pressure pump 23 to the discharge passage 22b, and the rotational speed of the engine 23 is increased or decreased according to the flow rate of the cleaning liquid. By executing the control, the amount of the cleaning liquid that returns from the high-pressure pump 22 to the cleaning liquid storage tank T2 via the spillway 22c can be set to an infinitely small amount.

Therefore, according to the configuration of the cleaning liquid supply device described above, the degree of return of the cleaning liquid that has been stored by receiving high-pressure energy from the high-pressure pump 22 to the cleaning liquid storage tank T2 via the spillway 22c can be reduced. The temperature rise of the cleaning liquid in the cleaning liquid storage tank can be suppressed.
Thereby, the original operation effect described in the column of the effect of above-mentioned invention can be acquired, such as the safety | security of the operation | work using a high pressure water injection nozzle being securable.

In the embodiment of the cleaning liquid supply device described above, the chemical liquid dilution mixing tank T1 is provided and the cleaning liquid obtained by adding the chemical liquid to the cleaning water is used. Alternatively, the cleaning water may be used as it is and discharged as a high-pressure cleaning liquid using the cleaning liquid delivery unit U2 shown in FIG.
Even in such a configuration, the technical problem that the temperature rise of the cleaning liquid in the cleaning liquid storage tank T2 can be effectively suppressed can be achieved.

3 and 4 show an example of a vehicle equipped with the above-described cleaning liquid supply device. A box-shaped casing 42 is mounted on the loading platform portion of the vehicle 41, and the cleaning liquid supply device shown in FIGS. 1 and 2 is accommodated in the casing 42.
As shown in FIG. 3, a door 43 that is pivotally supported so as to be double-opened in the horizontal direction is attached to the front of the left side surface of the casing 42 mounted on the loading platform of the vehicle 41, and behind the door 43. A door 44 that is pivotally supported so as to open in the horizontal direction is attached. Further, as shown in FIG. 4, a flip-up door 45 whose upper part is pivotally supported is attached to the rear surface of the housing 41.

FIG. 5 is a perspective view of the casing 42 placed on the loading platform of the vehicle 41 as viewed from above, and the left side in FIG. 5 is the front (driver's seat side).
The casing 42 is divided into a front chamber and a rear chamber by a central partition wall 42a. The engine 23 is mounted in a substantially central portion of the front chamber, and the high-pressure pump 22 is disposed adjacent to the engine 23. ing. The front of the front chamber is a wind exhaust space 46 in which a radiator attached to the engine 23 is accommodated. Although not shown in the drawing, a housing 42 provided with the air exhaust space 46 is provided. The top plate is provided with an exhaust port and the like.

In the rear chamber of the housing 42, the cleaning liquid storage tank T2 is disposed. As shown in FIG. 6, most of the cleaning liquid generation unit U1 shown in FIG. The function is installed.
In addition, an operation panel 47 of the cleaning liquid supply device is disposed toward the back surface, and this operation panel 47 is operated in a state where the door 45 shown in FIG. 4 is flipped up.
Reference numeral 48 denotes a space for storing equipment used together with the cleaning liquid supply device.

1 Water tap 2 Solenoid valve (water supply valve)
DESCRIPTION OF SYMBOLS 3 Flow sensor 4 Water quantity adjustment valve 6,7 Chemical liquid storage tank 8,9 Chemical liquid delivery pump 11 pH sensor 12 pH controller 13 Relay apparatus 14,15 Pump drive power supply 17 Float sensor 18 Liquid temperature sensor 19 Water saving controller 20 Blow water 22 High pressure pump 22a Suction path 22b Discharge path 22c Spillway 23 Engine 24 Pressure sensor 25 Rotation sensor 27 Engine controller 28 Flow switch 29 Discharge valve 31 Solenoid valve 32 Pressure regulating valve 33 Throttle controller T1 Chemical liquid dilution mixing tank T2 Cleaning liquid storage tank U1 Cleaning liquid generation unit U2 Cleaning liquid delivery unit

Claims (4)

The cleaning liquid is introduced and the chemical solution is mixed with the cleaning solution by adding and mixing the chemical solution to the cleaning water, and the cleaning solution is sent from the chemical solution dilution mixing tank to temporarily store the cleaning solution. A cleaning liquid storage tank, a high pressure pump that pressurizes and sends the cleaning liquid from the cleaning liquid storage tank to a high pressure, an engine by an internal combustion engine that rotationally drives the high pressure pump, and an engine controller that controls the rotational speed of the engine And a discharge passage for discharging the high-pressure cleaning liquid pressurized by the high-pressure pump, and a residual water passage for returning the residual water in the high-pressure cleaning liquid from the high-pressure pump into the cleaning liquid storage tank. A feeding device,
The engine controller is configured to execute control to increase or decrease the rotational speed of the engine in accordance with the flow rate of the cleaning liquid that proceeds from the high-pressure pump to the discharge path of the high-pressure cleaning liquid.
Water supply by a water supply valve that controls the amount of cleaning water introduced into the chemical liquid dilution mixing tank when a liquid temperature sensor that measures the temperature of the cleaning liquid in the cleaning liquid storage tank detects a liquid temperature increase above a predetermined value. A cleaning liquid supply apparatus configured to increase the amount so that the cleaning liquid in the cleaning liquid storage tank can be discharged as blow water.   The chemical solution dilution mixing tank is provided with a pH sensor for measuring the pH value of the cleaning solution in the mixing tank, and the chemical solution added to the chemical solution dilution mixing tank based on the pH value obtained by the pH sensor. The cleaning liquid supply device according to claim 1, wherein the amount of addition of the cleaning liquid is controlled.   A float sensor that detects the amount of the cleaning liquid in the cleaning liquid storage tank is provided, and cleaning that is supplied into the chemical dilution mixing tank by controlling the water supply valve based on information on detection of the liquid amount by the float sensor. It is configured to control the amount of water, and when the detected value of the liquid amount by the float sensor reaches a predetermined value, control is performed to stop water supply into the chemical liquid dilution mixing tank by the water supply valve. 4. The cleaning liquid supply apparatus according to claim 1, wherein the cleaning liquid supply apparatus is configured as described above.   The control for increasing the amount of water supplied by the water supply valve based on the liquid temperature detection information by the liquid temperature sensor has priority over the control for stopping the water supply by the water supply valve based on the liquid amount detection information by the float sensor. The cleaning liquid supply apparatus according to claim 4, wherein the cleaning liquid supply apparatus is configured to be executed.

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