JP3139833B2 - Floor washer with a function to display the remaining amount of cleaning water and the usable time - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of a floor cleaning machine for cleaning a floor surface with a rotating brush while running, and more specifically, the remaining amount of cleaning water and its use. The present invention relates to a floor washer having a function of displaying a possible time (the number of cleaning times).

[0002]

2. Description of the Related Art A floor cleaning machine that cleans a floor surface while supplying cleaning water to a rotary brush from a cleaning water tank mounted in a machine body by a pump cannot perform cleaning if the cleaning water in the tank runs out. During operation, you must always pay attention to the amount of water in the tank. However, sometimes the operator forgets to check the amount of water and the washing water runs out during the work, causing the water to be supplied to the tank in a hurry.As a result, the cleaning work of the floor surface is slowed down, Various problems have occurred, such as soiling the washed floor again.

Conventionally, a plurality of float type reed switches for measuring the water level are mounted in the washing water tank in a multi-stage manner to form a water level detection circuit which is switched one after another in accordance with a change in the water level.
A reed switch type water level detector configured to convey this switching state to the operator using a light emitting display (eg, an LED) or a pressure for detecting a water level in the washing water tank using a semiconductor pressure sensor. By using an external water level detector, the operator can externally check the water level in the washing water tank, thereby preventing the washing water in the tank from running out during the operation.

[0004]

However, in the case of the above-described reed switch type water level detector, if there is a change in the cross-sectional area in the height direction of the washing water tank, even if the water level can be detected by switching, the remaining water amount can be detected. Since it is not possible to accurately grasp the water level, there is a problem that the washing water runs out during the work of cleaning the floor surface.In the case of the above-mentioned pressure type water level detector, the semiconductor pressure sensor is very expensive, There was an economic problem that it was unprofitable when used in a floor washer, and none of the detectors could be put to practical use.

Accordingly, the technical problem of the present invention is to eliminate the above-mentioned reed switch or semiconductor pressure sensor without using a detector, and to measure the remaining amount of washing water in the washing water tank and the current supply water flow rate. That is, the usable time, that is, the washable time is calculated and can be displayed as a numerical value.

[0006]

Means taken by the present invention to solve the above-mentioned technical problems are as follows. The floor is cleaned by supplying cleaning water from the cleaning water tank to the rotating brush using a pump to clean the floor, and the squeegee is collected by the squeegee into the sewage tank under the suction of the blower. In

(1) Water supply flow rate calculating means for obtaining the flow rate of the cleaning water supplied to the rotating brush from the voltage applied to the pump motor, and calculating the water supply flow rate from the preset initial water flow rate of the cleaning water. Washing water remaining amount calculating means for obtaining the remaining water amount of the washing water by successive subtraction; and remaining amount displaying means for displaying the remaining water amount of the washing water numerically on a display.

(2) The remaining amount of the washing water calculated by the washing water remaining amount calculating means is divided by the water supply flow rate of the washing water calculated by the water supply flow rate calculating means, so that the remaining amount at the current water supply amount is obtained. Usable time calculating means for calculating the number of usable times; and usable time displaying means for displaying the usable times numerically on a display.

[0009]

The above means operates as follows. According to the means (1), since the relationship between the rotation speed of the pump motor and the motor applied voltage is substantially proportional, the rotation speed of the pump motor, that is, the pump speed is determined by detecting the motor applied voltage. The flow rate of the washing water supplied to the rotating brush from the washing water tank can be detected. In addition, if the initial amount of the washing water stored in the washing water tank is measured (set) in advance, and the supply amount of the washing water is sequentially subtracted from the initial amount of the washing water, a flow meter or a water level detector is obtained. The amount of washing water remaining in the washing water tank can be calculated without using equipment, and the remaining water amount is displayed numerically, allowing the operator to visually check the amount of washing water while cleaning the floor surface. Can be reliably performed without running out of washing water in the middle.

According to the means (2), if the remaining amount of the washing water calculated by the means is divided by the flow rate of the washing water calculated by the means, the current water supply amount is determined. How long you can use it, that is,
The number of usable hours (washable hours) can be calculated, and the number of usable hours can be displayed as a numerical value. It is possible to proceed without fail. 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 EMBODIMENTS A preferred embodiment of a floor washing machine having a function of displaying the remaining amount and usable time of the washing water according to the present invention will be described below in detail with reference to the accompanying drawings. FIG.
1 is a configuration diagram illustrating the internal structure of a floor cleaning machine according to the present invention, in which 1 is the body of the floor cleaning machine, 1a is an operation handle, CU is a control unit, 2 is running wheels, 3 Is a caster, T is a battery, 4 is a washing water tank containing washing water CW, 5 is a sewage tank containing sewage DW, 5a is a sewage collection hose with a squeegee 5b attached to the lower end, 5
c is a hose for draining sewage, 6 is washing water C of washing water tank 4
A water supply pump for supplying W to the rotary brush 8 through the water supply pipe 7, a motor 8 M for the rotary brush 8, and a suction blower 9 for suctioning the waste water tank 5 through the suction pipe 10, which is applied to the waste water tank 5. The suction force is applied to the squeegee 5b through the sewage collection hose 5a, and the squeegee 5b is configured to collect the sewage on the floor surface into the sewage tank 5.

FIG. 2 is a detailed view of the washing water tank 4 described above. As shown, the washing water tank 4 is provided with a water inlet 4c from the top of the tank ha so that it can store only a certain amount of washing water CW. It is provided at a distance, and its mouth has cleaning water C
The lid 4d is attached so that W does not spill. Also, the upper and lower float SW4a and the float SW4b are separated from each other by a distance h above and below the inside of the washing water tank 4.
Is attached, and the upper limit float SW4a is provided at a depth of hb below the water surface.

FIG. 3 is a block diagram showing the electrical configuration of the arithmetic and display unit for calculating and displaying the remaining amount and the available time of the washing water used in the present invention.
11, an initial set amount of the system program and the washing water CW,
The interface circuit 15 connected via a bus 13 to the memory 12 for storing the integrated supply flow rate of the washing water has the above-described float SW 4a for the upper limit and the float SW 4a for the lower limit.
And a float SW 4b, a water amount setter 16 for the wash water CW having an ON / OFF switch, a flow setter 17 for adjusting the rotation of the motor 6M of the feed water 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
An indicator 30 for displaying the remaining amount of W and the available time is connected.
4 is connected to the motor-applied voltage detection circuit 1
By calculating the supply flow rate of the wash water CW from the voltage applied to the pump motor 6M detected by the pump 9, the water supply flow rate is sequentially subtracted from the initial flow rate of the wash water CW, which has been previously keyed by the water amount setting unit 16, The amount of the washing water CW remaining in the tank 4 is calculated, and the remaining amount is displayed on the display 3.
A washing water remaining amount calculating and displaying function for numerically displaying 0 as the washing water CW,
Calculate the remaining usable time at the current water supply amount by dividing by the supplied water flow rate, and display the remaining usable time calculation display function of numerically displaying the number of times on the display 30. It is configured to be.

FIG. 4 is a block diagram of a control panel CP provided in the above-mentioned control unit CU (see FIG. 1).
An ON / OFF switch 22 for operation, a water supply switch 23 for turning ON / OFF water supply of the cleaning water CW to the rotating brush 8, an ON / OFF switch 24 for the suction blower 9 described above, and an ON / OFF of the rotating brush motor 8M. A / OFF switch 25, a washing water shortage indicator lamp 26 that lights up when the washing water CW is insufficient, a rotating brush ground pressure indicator lamp 27 that displays the ground pressure of the rotating brush 8 in three stages, a sewage tank full indicator lamp 28, A power meter 31 for displaying the usage status of the battery T;
An operation dial 32 (see FIG. 3), the display 30 described above, and a mode switch 29 for switching display contents of the display 30 are provided.

FIG. 5 shows a display example of the remaining amount of the washing water CW displayed on the display 30 and the transition thereof. In the drawing, reference numeral 30A denotes 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 the remaining 10 liters using 10 liters.

FIG. 6 shows a display example of the remaining cleaning liquid use time (usable time) and its transition. In the figure, reference numeral 30D denotes a display example when the amount of the cleaning water CW is sufficient. , 30E show display examples in the case where the available time is 20 minutes with the current amount of washing water used.

Since the floor washer according to the present invention uses the battery T as a main power source, the relationship between the motor speed (Nm) and the motor applied voltage (Vm) in the pump motor 6M is substantially proportional to the DC motor. Becomes the relationship. Therefore, the water supply flow rate Q of the pump 6 is represented by the following equation: Q = αNm + β = α′Vm + β (1) Here, α, α ′, and β are all coefficients.

Now, the amount of water in the washing water tank 4 is V,
Represents the relationship between V and t due to an arbitrary change in Q,
Then, it becomes as shown in FIG. 7 and FIG.
It looks like below. Initial water volumeVfAnd the amount of water is V₁,
V₂, V₃, V₄And sequentially change,Vf= V₁+ V₂+ V₃+ V₄ …………………… (2) The flow rate is Q₁, Q₂, Q₃, Q₄And the time that changed sequentially
Each t₁, T₂, T₃, T₄Then, V₁= Q₁t₁ ………………… (3) V₂= Q₂(T₂-T₁) ………………… (4) V₃= Q₃(T₃-T₂) ………………… (5) V₄= Q₄(T₄-T₃) ……………………………………… (6)Vf= V₁+ V₂+ V₃+ V₄  = Q₁t₁+ Q₂(T₂-T₁) + Q₃(T₃-T₂) + Q₄(T₄-T₃) (7)

The usable time indicates how much the water can be used at the current flow rate for a certain amount of water. Therefore, the end times (time when the water volume becomes zero) at each flow rate are te ₁ and te. _{In the case of 2} , te ₃ and te ₄ ,
The individual usable times T ₁ , T ₂ , T ₃ , and T ₄ are as follows: T ₁ = te ₁ −t ₁ = Vf / Q ₁ −t ₁ ... (8) T ₂ = te _{2 -t 2 = (Vf -V 1} ) / Q 2 -t 2 ........................... (9) T 3 = te 3 -t 3 = (Vf -V 1 -V 2) / Q 3 −t ₃ ... (10) T ₄ = te ₄ −t ₄ = ( Vf− V ₁ −V ₂ −V ₃ / Q ₄ −t ₄ ... (11) Therefore, equation (3) is obtained. ) 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 30.

Next, the above-mentioned equation (7) can be expressed by a general equation in order to find the usable time at an arbitrary flow rate change: Vf = ΣQi (ti-ti- 1 ) (i = 1, 2, 3) , N)... (12) Equations (8) to (11) are generally expressed as follows: Tn = ten−tn = ( Vf− ΔVi− 1 ) / Qn−tn = ( Vf− ΔVi− 1 ) / Qn-Vn / Qn = ( Vf -ΣVi) / Qn = {Vf -ΣQi (ti-ti- 1)} / Qn (i = 1,2,3 ..., n) (13)

[0021] Here, when the ti-ti- 1 "tn the relationship, equation Tn = {Vf -ΣQi (Δt) } to obtain the available time at a fixed time interval Delta] t regardless flow change / Qn (i = 1, 2, 3,..., N) (14) is equivalent to equation (13). Thus, the formula for obtaining the available time Tk at a certain flow rate Qk is, Tk = {Vf -ΣQi (Δt )} / Qk (i = 1,2,3 ..., k) (15) , and the To illustrate this As shown in FIGS. 9 and 10.

Here, when the remaining amount is expressed not by the usable time but by the amount of water, from equation (15), Ck = Vf− ΣQi (Δt) (i = 1, 2, 3,..., K) (16) ). Here, Ck represents a remaining water amount at a certain flow rate Qk.

Next, a processing procedure for displaying the remaining amount of cleaning water by the usable time and a processing procedure for expressing the remaining water quantity by the remaining water amount will be described with reference to flowcharts shown in FIGS. In the first step S1, it is determined whether or not the switch of the water amount setting device 16 is ON, and in the case of 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 to input an initial water amount (for example, 20 liters) by key input, and then proceeds to the next step S3 to execute the initial water amount. Is recorded in the memory 12 and the process proceeds to the next step S5. In the case of NO in the step S1,
That is, when using the preset initial water volume as it is, the process proceeds to step S6, where the initial water volume 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, the process proceeds to step S7 to set an interval time such as a measurement interval. Thereafter, the process proceeds to the next step S8 to determine whether or not the lower limit float SW 4b attached to the washing water tank 4 has been turned on. If it is performed (when the water level is higher), the process proceeds to the next step S9, and it is determined whether or not the upper limit float SW 4a is turned on this time.
If it is not ON (when the water level is lower), the process proceeds to the next step S10, where the applied voltage to the pump motor 6M is detected. Then, the process proceeds to step S11 to calculate the supply flow rate of the washing water CW from this applied voltage. Then, the process proceeds to the next step S12 shown in FIG.

In step S12, the calculated water supply flow rate is added to the integrated water supply flow rate. Then, the flow advances to step S13 to determine the available time from the preset initial water amount, cumulative water supply flow rate, interval time, and current water supply flow rate. After calculating, further proceeding to step S14 to store the above-described integrated water supply flow rate in the memory 12, proceeding to the next step S15, the above-mentioned usable time is output to the display 30;
In the next step S16, the number of usable hours is displayed in a display pattern as shown in FIG.
And the above-described processing is repeated.

In step S8, the lower limit float S
If W4b is not ON, the flow proceeds to step S17 to output "wash water replenishment" on the display 30. Then, the flow proceeds to step S16 to display the contents of the output to prompt the replenishment of the wash water, Upper limit float SW in S9
If the switch 4a is turned on, the process proceeds to step S18 to output "wash water full" to the display 30, and then to step S18.
Proceeding to 16, the output contents are displayed.

Although the above-described flowchart has described the processing procedure when the remaining amount of the washing water is displayed on the display 30 with the usable time as shown in FIG. 6, the processing procedure is shown in FIG. Is displayed in step S13 described above.
Instead, the process of step S19 as shown in FIG. 12, that is, the remaining water amount is calculated from the initial water amount, the integrated water supply flow rate, and the interval time, and further, the above-described step S19 is performed.
Instead of the processing of step S20, that is, by outputting the remaining water amount to the display unit 30, the remaining amount of the cleaning water CW can be displayed on the display unit 30 in the part of FIG.

[0028]

As described above, the floor washer having the function of displaying the remaining amount of the washing water and the usable time according to the present invention is as described above. Therefore, the flow rate of the water supply can be obtained from the voltage applied to the pump motor. Thus, the remaining amount of washing water can be represented by the remaining amount of water or the available time, so even when using a washing water tank whose cross-sectional area in the height direction changes, the remaining amount and available time can be used. The number can be calculated accurately and the remaining amount and the number of usable hours are numerically displayed on a display. By accurately grasping the number, it is possible to prevent the washing water from running out during the floor washing operation.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing a structure of a washing 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 a remaining amount of cleaning water.

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

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

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

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

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

FIG. 11 is a flowchart illustrating a processing procedure when displaying the remaining amount of cleaning water by a usable time and a processing procedure when expressing the remaining water quantity by a remaining water amount.

FIG. 12 is a flowchart showing a continuation of the flowchart shown in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor washing machine body 4 Washing water tank CW Washing water 5 Sewage tank DW Sewage 5b Squeegee 6 Water supply pump 6M Pump motor 8 Rotary brush 9 Suction blower 16 Water volume setting device 17 Flow rate setting device 19 Motor applied voltage detection circuit 30 Display

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 11/293

Claims (2)

(57) [Claims] The cleaning water is supplied from a cleaning water tank to a rotating brush by a pump to clean the floor surface, and the squeegee is collected in the sewage tank by the suction action of the cleaned sewage by suction of a blower. In the floor washer, a water supply flow rate calculating means for obtaining a water supply flow rate of the cleaning water supplied to the rotating brush from the voltage applied to the pump motor,
A washing water remaining amount calculating means for sequentially calculating the remaining amount of the washing water by sequentially subtracting the supply flow rate from the previously set initial amount of the washing water; A floor washer having a function of displaying a remaining amount of washing water, comprising a remaining amount display means for displaying. 2. The floor cleaning machine according to claim 1, wherein the remaining amount of the washing water calculated by the remaining washing water calculating means is calculated by using a flow rate of the washing water calculated by the feeding water flow rate calculating means. Dividing by the available water amount calculating means for obtaining the remaining usable time number at the current water supply amount; anda usable time displaying means for displaying the usable time by a numerical value on a display. A floor washer equipped with a function to display the usable time of washing water.