JPH05329084A - Floor washing machine with function to display residual washing water amount and serviceable time - Google Patents

Abstract

PURPOSE:To calculated the residual amount of a washing water in a tank, which is mounted on a floor surface washing machine, and the hours in which the remaining washing water is serviceable accoding to the current rate of flow of the supply water, without use of any sensor, and display the result numerically. CONSTITUTION:The rate of flow of supply water is determined from the impression voltage on a motor of a water supply pump 6, which supplies the washing water CW stored in a tank 4 to a rotary brush 8, and the obtained flow rate is subtracted from the initial quantity of washing water CW set previously, and thereby the residual amount of the washing water is determined. At the same time, the hours serviceable with the current flow rate of supply waer is determined by dividing the obtained residual amount with the flow rate of supply water. A display exhibits these acquired residual amount and hours serviceable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is utilized in the technical field of a floor cleaning machine for cleaning a floor surface with a rotating brush while traveling, and specifically, the remaining amount and usage of cleaning water. The present invention relates to a floor cleaning machine having a function of displaying available time (number of washable hours).

[0002]

2. Description of the Related Art In a floor cleaning machine that cleans a floor surface while supplying cleaning water to a rotating brush from a cleaning water tank installed in a machine body, the cleaning cannot be performed when the cleaning water in the tank is exhausted. , It is always necessary to pay attention to the amount of water in the tank during operation. However, sometimes the user forgets to check the amount of water, and the wash water runs out in the middle of the work, and water may be rushed to the tank.As a result, the cleaning work on the floor may be delayed, Various problems such as soiling the cleaned floor surface again occurred.

Therefore, conventionally, by mounting a plurality of float type reed switches for measuring the water level in a multi-stage manner inside the wash water tank, a water level detecting circuit which is switched one after another according to the change of the water level is constructed.
A reed switch type water level detector configured to notify the operator of this switching state using a light emitting type display (LED, etc.) or a pressure for detecting the water level in the wash water tank using a semiconductor pressure sensor. A type water level detector was used to allow the operator to confirm the water level in the wash water tank from the outside, thereby preventing the problem that the wash water in the tank runs out during the work.

[0004]

However, in the case of the above-mentioned reed switch type water level detector, if the cross-sectional area in the height direction of the wash water tank changes, the water level can be detected by switching, but the remaining water amount. Since it is not possible to accurately grasp the above, there is a problem that the cleaning water runs out during the work of cleaning the floor surface, and in the case of the pressure type water level detector described above, the semiconductor pressure sensor is very expensive and There was an economical problem in that it was not profitable when used in a floor cleaning machine, and neither of the detectors could be put to practical use.

Therefore, the technical problem of the present invention is to use the reed switch and the detector such as the semiconductor pressure sensor described above without using a detector such as the remaining amount of wash water in the wash water tank and the current feed water flow rate. This is to calculate the usable time, that is, the washable time so that the numerical value can be displayed.

[0006]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows. A floor cleaning machine configured to supply cleaning water to the rotating brush from the cleaning water tank with a pump to clean the floor surface, and the squeegee collects the dirty water after cleaning into the dirty water tank by the suction action of the blower. At

(1) A feed water flow rate calculating means for obtaining a feed water flow rate of wash water to be supplied to the rotary brush from the voltage applied to the pump motor, and this feed water flow rate from a preset initial water amount of wash water. The washing water residual amount calculating means for obtaining the remaining amount of the washing water by successively subtracting it, and the residual amount displaying means for numerically displaying the remaining amount of the washing water on the display.

(2) The remaining amount of the wash water calculated by the wash water remaining amount calculating means is divided by the wash water supply flow rate calculated by the water supply flow rate calculating means to obtain the remaining amount of the current water supply. It comprises an available time calculating means for obtaining the number of available hours and an available time display means for displaying the available time numerically on the display.

[0009]

The above means operates as follows. According to the above-mentioned means (1), the rotational speed of the pump motor and the voltage applied to the motor are in a substantially proportional relationship. Therefore, by detecting the voltage applied to the motor, the rotational speed of the pump motor, that is, the pump It is possible to detect the flow rate of the wash water supplied from the wash water tank to the rotary brush. Further, by measuring (setting) the initial amount of wash water stored in the wash water tank in advance and successively subtracting the amount of wash water supplied from this initial amount of water, it was called a flow meter or water level detector. The amount of wash water remaining in the wash water tank can be calculated without using any equipment, and by displaying the remaining amount of water numerically, the operator can visually check this amount of water while cleaning the floor surface. It is possible to reliably proceed without washing water running out on the way.

According to the above-mentioned means (2), if the remaining amount of the wash water calculated by the above-mentioned means is divided by the supply flow rate of the wash water calculated by the above-mentioned means, the current water supply amount is obtained. How long you can use it,
The number of usable hours (the number of washable hours) can be calculated and the number of usable hours can be displayed numerically, so the floor surface can be washed off while washing the floor while confirming the remaining usable time visually. It is possible to proceed reliably without causing. As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a floor cleaning machine having a function of displaying the remaining amount and the usable time of the cleaning water according to the present invention will be described below in detail with reference to the accompanying drawings. Figure 1
1 is a configuration diagram illustrating an internal structure of a floor cleaning machine according to the present invention, in which 1 is a body of the floor cleaning machine, 1a is an operation handle, CU is a control unit, 2 is a traveling wheel, and 3 is a wheel. Is a caster, T is a battery, 4 is a wash water tank for containing wash water CW, 5 is a waste water tank for containing waste water DW, 5a is a hose for collecting waste water having a squeegee 5b attached to its lower end, 5
c is a drainage hose for drainage, 6 is cleaning water C in the cleaning water tank 4.
A water supply pump for supplying W to the rotating brush 8 through the water supply pipe 7, 8M is a motor for the rotating brush 8, 9 is a suction blower that exerts a suction action on the dirty water tank 5 through the suction pipe 10, and is applied to the dirty water tank 5. The suction force is applied to the squeegee 5b through the dirty water collecting hose 5a to collect the dirty water on the floor into the dirty water tank 5.

FIG. 2 is a detailed view of the washing water tank 4 described above. As shown in the figure, the washing water tank 4 has a water injection port 4c from the top of the tank so that only a certain amount of washing water CW can be stored. It is provided at a distance and its mouth is flushed with water C
A lid 4d is attached so that W does not spill. Further, the upper and lower float SW4a and the float SW4b for the upper limit and the lower limit are provided with a distance of h above and below the inside of the wash water tank 4.
Is attached, and the float SW 4a for the upper limit is provided at a depth hb below the water surface.

FIG. 3 is a block diagram showing an electrical configuration of a calculation display device for calculating and displaying the remaining amount and the usable time of the washing water used in the present invention, and a CPU as a control unit.
11, system program and initial setting amount of wash water CW,
In addition, the interface circuit 15 connected via the bus 13 to the memory 12 that stores the accumulated supply flow rate of the wash water is provided with the above-mentioned upper and lower float SW 4a.
And a float SW 4b, a water quantity setting device 16 for the wash water CW equipped with an ON / OFF switch, a flow rate setting device 17 for adjusting the rotation of the motor 6M of the water supply pump 6 to set the flow rate of the wash water CW, and a pump A control circuit 20 for controlling the operation of the motor 6M, a motor applied voltage detection circuit 19 for detecting the applied voltage of the pump motor 6M, and the calculated cleaning water C
A display unit 30 for displaying the remaining amount of W and the available time is connected, and further, the CPU 11 has a timer 1 for interval.
4 is connected to the motor applied voltage detection circuit 1 described above.
By calculating the feed water flow rate of the wash water CW from the voltage applied to the pump motor 6M detected by 9, and successively subtracting this feed water flow rate from the initial water amount of the wash water CW keyed in advance by the water amount setting device 16, The amount of wash water CW remaining in the tank 4 is calculated, and the remaining amount is displayed on the display 3
Wash water residual amount calculation display function for numerically displaying 0, and wash water CW calculated above for the calculated residual amount of wash water CW
The remaining usable time calculation display function that calculates the remaining usable time with the current water supply amount and displays the remaining usable time numerically on the display 30 by dividing by the supplied water flow rate Is configured to.

FIG. 4 is a block diagram of the control panel CP provided in the above-mentioned control unit CU (see FIG. 1). On the panel surface, a main switch 21 for power supply,
An ON / OFF switch 22 for operation, a water supply switch 23 for turning on / off the supply of the cleaning water CW to the rotary brush 8, an ON / OFF switch 24 for the suction blower 9 described above, and an ON of the rotary brush motor 8M. An ON / OFF switch 25, a wash water shortage indicator lamp 26 that lights up when the wash water CW is insufficient, a rotary brush ground pressure indicator lamp 27 that displays the ground pressure of the rotary brush 8 in three stages, and a dirty water tank full indicator lamp 28. The power meter 31 for displaying the usage status of the battery T and the flow rate setting device 17 described above.
An operation dial 32 (see FIG. 3), the above-described display device 30, and a mode switch 29 for switching the display content of the display device 30 are provided.

FIG. 5 shows a display example of the remaining amount of the wash water CW displayed on the above-mentioned display device 30 and its transition. In the figure, 30A is a display example in the case of Full 20 liters, 30B shows a display example of 5 liters, and 30C shows a display example of 10 liters using 10 liters.

FIG. 6 shows a display example of the remaining cleaning liquid usage time (usable time) and its transition. In the figure, 30D is a display example when the amount of the cleaning water CW is sufficient. , 30E shows a display example when the available amount of washing water is 20 minutes.

Since the floor washer according to the present invention uses the battery T as the main power source, the relationship between the motor rotation speed (Nm) and the motor applied voltage (Vm) in the pump motor 6M is almost proportional to the DC motor. It becomes a relationship. Therefore, when the feed water flow rate Q of the pump 6 is expressed by an equation, Q = αNm + β = α′Vm + β (1) However, α, α ′, and β are all coefficients.

Now, assuming that the amount of water in the wash water tank 4 is V and the usage time is t, the relationship between V and t due to an arbitrary change in Q is expressed as shown in FIGS. 7 and 8, which is expressed by an equation. And becomes as follows. Let V _{0 be the} initial amount of water and V ₁ , V
_When it changes sequentially in the order of ₂ , V ₃ and V ₄ , V ₀ = V ₁ + V ₂ + V ₃ + V ₄ …………………… (2) The flow rate becomes Q ₁ , Q ₂ , Q ₃ and Q ₄ . The time that changes sequentially is t
Assuming ₁ , t ₂ , t ₃ , and t ₄ , V ₁ = Q ₁ t ₁ …………………… (3) V ₂ = Q ₂ (t ₂ −t ₁ ) ………… …………… (4) V ₃ = Q ₃ (t ₃ −t ₂ ) ………………………… (5) V ₄ = Q ₄ (t ₄ −t ₃ ) ………… (6) From the formula (2), V ₀ = V ₁ + V ₂ + V ₃ + V _{4 = Q 1 t 1 + Q 2} (t 2 -t 1) + Q 3 (t 3 -t 2) + Q 4 (t 4 -t 3) ... becomes (7).

Since the usable time represents how much the current flow rate can be used for a certain amount of water, the end time (time when the amount of water becomes zero) at each flow rate is te ₁ , te. _{When 2} , te ₃ and te ₄ are used, the respective usable times T ₁ , T ₂ , T ₃ and T ₄ are T ₁ = te ₁ -t ₁ = V ₀ / Q ₁ -t ₁ ... …………………… (8) T ₂ = te ₂ −t ₂ = (V ₀ −V ₁ ) / Q ₂ −t ₂ ………………………… (9) T ₃ = te ₃ −t ₃ = (V ₀ −V ₁ −V ₂ ) / Q ₃ −t ₃ …………………… (10) T ₄ = te ₄ −t ₄ = (V ₀ −V ₁ −V ₂ − V ₃ / Q ₄ −t ₄ (11) Therefore, formulas (3) to (6) and (8) to (1
1) If used, the usable time at each flow rate is obtained, and this can be numerically displayed on the display unit 30.

Next, in order to obtain the usable time at any change in the flow rate, the above equation (7) is expressed by a general equation as follows: V ₀ = ΣQi (ti-ti-i) (i = 1, 2, 3 ..., n) ............... (12 ) equation (8) to (11) are generally, Tn = ten-tn = ( V 0 -ΣVi-i) / Qn-tn = (V 0 -ΣVi -i) / Qn-Vn / Qn = (V 0 -ΣVi) / Qn = {V 0 -ΣQi (ti-ti-i)} / Qn (i = 1,2,3 ..., n) (13)

Here, in the case of the relationship ti-ti-i << tn, an equation for obtaining the usable time at a constant time interval Δt regardless of the flow rate change Tn = {V ₀ -ΣQi (Δt)} / Qn ( i = 1, 2, 3, ..., N) (14) is equivalent to the equation (13). Therefore, the formula for obtaining the usable time Tk at a certain flow rate Qk is Tk = {V ₀ -ΣQi (Δt)} / Qk (i = 1, 2, 3 ..., K) (15) Then, it becomes like FIG. 9 and FIG.

Here, when the remaining amount is expressed by the amount of water instead of the usable time, from the equation (15), Ck = V ₀ −ΣQi (Δt) (i = 1, 2, 3 ..., K) ... 16). However, Ck represents the residual water amount at a certain flow rate Qk.

Next, the processing procedure for displaying the remaining amount of wash water in the usable time and the processing procedure for expressing it in the remaining water amount will be described with reference to the flow charts shown in FIGS. 11 and 12. In the first step S1, it is determined whether or not the switch of the water amount setting device 16 is ON, and if YES,
That is, if the water amount is not set or if it is desired to change the setting, the process proceeds to the next step S2 and the initial water amount (for example, 20 liters) is input by key input, and then the process proceeds to the next step S3 and the initial water amount is Is recorded in the memory 12 and the process proceeds to the next step S5, but if NO in step S1,
That is, when the preset initial water amount is used as it is, the process proceeds to step S6, the initial water amount is read from the memory 12, and then the process proceeds to step S5.

When the process proceeds to step S5, the timer 14 is turned on.
Then, in step S7, an interval time such as a measurement interval is set, and then in step S8, it is determined whether or not the lower limit float SW4b attached to the wash water tank 4 is turned on. If so (if the water level is higher), the process proceeds to the next step S9, this time it is determined whether or not the upper limit float SW4a is turned on,
When it is not turned on (when the water level is lower), the process proceeds to the next step S10, the applied voltage to the pump motor 6M is detected, and then the process proceeds to step S11 to calculate the supply flow rate of the wash water CW from this applied voltage. Then, the process proceeds to the next step S12 shown in FIG.

In step S12, the calculated feed water flow rate is added to the integrated feed water flow rate, and then the flow proceeds to step S13 to set the preset available water amount, integrated feed water flow rate, interval time, and available time from the current feed water flow rate. After calculating and further proceeding to step S14 to store the above-mentioned accumulated water supply flow rate in the memory 12, proceed to the next step S15 to output the above-mentioned usable time to the display unit 30,
In the next step S16, this usable time number is displayed in the display pattern as shown in FIG.
Then, each processing described above is repeated.

In step S8 described above, the lower limit float S
If W4b does not turn on, the process proceeds to step S17 to output "wash water replenishment" to the display unit 30, and then proceeds to step S16 to display the output contents to prompt the wash water replenishment while the above-mentioned step Upper limit float SW in S9
If 4a is turned on, the process proceeds to step S18, "Flush water full" is output to the display device 30, and then step S18.
Proceed to 16 to display this output content.

The above-mentioned flow chart has been described with reference to the processing procedure when the remaining amount of cleaning water is displayed on the display unit 30 in the usable time as shown in FIG. 6. However, as shown in FIG. When displaying in step S13,
12 instead, the process of step S19 as shown in FIG. 12 is performed, that is, the remaining water amount is calculated from the initial water amount, the cumulative water supply flow rate, and the interval time, and the above-described step S19 is performed.
Instead of the part of 15, the processing of step S20, that is, by outputting the remaining water amount to the display device 30, the remaining amount of the wash water CW can be displayed on the display device 30.

[0028]

Since the floor cleaning machine having the function of displaying the remaining amount and the usable time of the cleaning water according to the present invention is as described above, the feed water flow rate can be obtained from the voltage applied to the pump motor. The remaining amount of wash water can be expressed by the remaining amount of water or the usable time, so even when using a wash water tank whose cross-sectional area in the height direction changes, the remaining amount and usable time The number can be calculated accurately, and the remaining amount and usable time are displayed numerically on the display. By accurately grasping the number, it is possible to prevent the cleaning water from running out during the floor cleaning work.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an internal structure of a floor cleaning machine according to the present invention.

FIG. 2 is a cross-sectional view showing the structure of a wash water tank used in the present invention.

FIG. 3 is a block diagram showing an electrical configuration of a control device used in the present invention.

FIG. 4 is a front view of a control panel.

FIG. 5 is a configuration diagram showing an example of a display pattern of the remaining amount of wash water.

FIG. 6 is a configuration diagram showing an example of a display pattern of remaining cleaning water available time.

FIG. 7 is a diagram illustrating the relationship between the amount of water in the wash water tank and the usage time.

FIG. 8 is a diagram illustrating a relationship between a supply flow rate of cleaning water and a usage time.

FIG. 9 is a diagram illustrating the relationship between the amount of water in the wash water tank and the usage time when the flow rate of wash water changes arbitrarily.

FIG. 10 is a diagram illustrating the relationship between the flow rate of cleaning water and the operating time when the flow rate of cleaning water changes arbitrarily.

FIG. 11 is a flowchart illustrating a processing procedure for displaying the remaining amount of cleaning water in the usable time and a processing procedure for displaying the remaining amount of water.

12 is a flowchart showing a continuation of the flowchart shown in FIG.

[Explanation of symbols]

 1 Body of floor cleaning machine 4 Wash water tank CW Wash water 5 Sewage tank DW Sewage 5b Squeegee 6 Water supply pump 6M Pump motor 8 Rotating brush 9 Suction blower 16 Water quantity setting device 17 Flow rate setting device 19 Motor applied voltage detection circuit 30 Indicator

Claims (2)

[Claims] 1. The cleaning water is pumped from the cleaning water tank to a rotary brush to clean the floor surface, and the squeegee collects the cleaned sewage into the sewage tank by the suction action of the blower. In the floor cleaning machine, a water supply flow rate calculating means for calculating a water supply flow rate of the cleaning water supplied to the rotary brush from the voltage applied to the pump motor.
The remaining amount of wash water is calculated by subtracting this feed water flow rate from the preset initial amount of wash water, and the remaining amount of wash water is displayed numerically on the display. A floor cleaning machine having a function of displaying the remaining amount of cleaning water, characterized by comprising a remaining amount display means for displaying. 2. The floor cleaning machine according to claim 1, wherein the residual quantity of the wash water calculated by the residual quantity of wash water is calculated as the feed flow rate of the wash water calculated by the feed water flow rate calculation means. It comprises an available time calculating means for obtaining the number of remaining available hours at the present water supply amount by dividing, and an available time displaying means for numerically displaying this available time on the display. A floor washer equipped with a feature to display the available time of the wash water.