JP3168678B2 - Bathtub water purification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub water purifying apparatus provided with a control unit for backwashing a filter.

[0002]

2. Description of the Related Art In recent years, bathtubs equipped with a bathtub water purifier for saving water have been used.

Conventionally, this type of bathtub water purification apparatus has a configuration as shown in FIG. Hereinafter, the configuration will be described with reference to the drawings. In the figure, 1 is a bathtub,
Reference numeral 2 denotes a pump for circulating hot and cold water in the bathtub 1, and a three-way valve 3.
a and 3b are for switching between bubble injection, circulation filtration and backwashing of the filter. Reference numeral 4 denotes a washing branch pipe connected to the three-way valves 3a and 3b. The filter 5 has a built-in granular filter medium 6, a filter bed 7, and the like, and an upper water pipe 8 and a lower water pipe 9 are connected to the filter 5. Reference numeral 10 denotes a water level sensor for detecting the water level of the bathtub water, and controls the operation of the pump 2 and the three-way valves 3a and 3b by inputting the signal of the water level sensor 10 to the control unit 11. Reference numeral 12 denotes a suction port for hot water, 13 denotes a discharge port for jetting bubbles, 14 denotes a discharge port for discharging hot water and dirt during backwashing, and 15 denotes a start switch which also functions as a bubble switch.

Next, the operation will be described with reference to FIG. 3 and FIG. That is, when the pump start switch 15 is turned on, the control unit 11 outputs a pump operation signal and the pump 2 starts. When the pump 2 starts, as shown by the arrow A,
Hot and cold water in the bathtub 1 is sucked in from the suction port 12 and is bubble-injected from the discharge port 13, and at the same time, is supplied to the filter 5 from the upper flowing water pipe 8 through the three-way valve 3 a. The water is discharged to the bathtub 1 via the pipe 9 and the pump 2 and a part of the water flows from the upper flowing water pipe 8 to the lower flowing water pipe 9 to carry out a circulation filtration operation. The filter medium 6 is gradually soiled as the filtration is performed, and the filtered material is accumulated and the performance of the filter 5 is deteriorated. Therefore, the filter medium 6 is periodically washed with bath water. Once the bathtub water is drained, the water level sensor 10 detects it. Next, when water is newly supplied to the bathtub 1, the water level sensor 10 detects the pump operation signal and the pump operation signal from the control unit 11 when the first start switch 15 is turned on. A three-way valve switching signal is output. At the same time when the pump 2 is started, the three-way valves 3a and 3b are switched, and the hot and cold water in the bathtub 1 is sucked through the suction port 12 as shown by the arrow B.
At the same time as the air bubbles are injected from the discharge port 13, the air is supplied from the lower water pipe 9 to the filter 5 through the three-way valve 3 b to wash the filter bed 7. At this time, the granular filter medium 6 is made to be in a fluidized state, descaling and dust are separated, drained from the outlet 14 through the upper flowing water pipe 8 and the three-way valve 3a, and the washing is continued for a predetermined time. After the washing is completed, a three-way valve switching signal is output from the control unit 11, the three-way valves 3a and 3b are switched as shown by the arrow A, and the circulation filtration operation is performed together with the bubble injection. When the hot and cold water in the bathtub 1 is drained and the water level sensor 10 operates, the pump 2 stops to prevent idling.

[0005]

However, in the above-mentioned conventional structure, the tub water can be circulated and filtered at the same time as the air bubble is injected into the bath tub 1, so that the bath tub water is not contaminated in one-day use and the next day bath tub is not stained. There is a case where the water is not drained, the hot water is added, and the bath is taken. Therefore, the water level sensor 10 does not operate, and the filter medium 6 of the filter 5 is not backwashed every day.
Is gradually contaminated, and in one backwashing of the filter medium 6, the filtered material cannot be completely removed from the filter 5, and the performance of the filter 5 deteriorates.
Bad smell is generated in the hot water. In addition, the temperature of the hot water in the filter 5 decreases when the pump 2 is not operated, and particularly in winter, the temperature of the hot water in the filter 5 drops remarkably. There was a problem that hot water flowed and caused the bath temperature to drop.

The present invention solves the above-mentioned conventional problems. Even when the water level sensor does not operate, the filter medium of the filter can be sufficiently washed, the bad smell of the hot water in the filter can be prevented, and the temperature of the bathtub water can be prevented. It is an object of the present invention to provide a bathtub water purification device capable of performing a circulating filtration operation without a decrease.

[0007]

According to the present invention, in order to attain the above object, the control means performs backwashing of the filter for a certain period of time at the time of the first bubble injection after the water level sensor is activated, and performs the next bubble injection. Each time, the filter is backwashed for a drain time corresponding to the amount of water in the filter.

[0008]

In the above construction, when the water level sensor inputs a start signal to the control means, the filter is backwashed for a certain time at the time of the first bubble injection, and the amount of water in the filter is reduced by the next bubble injection. Since the filter is backwashed for a corresponding drainage time, the filter medium is thoroughly washed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the same components as those shown in the above-described conventional example are denoted by the same reference numerals, and the description thereof will be omitted. The characteristic configuration of the present embodiment is that the operation of the control unit described in the conventional example is improved. That is, the control unit 16 is composed of various electronic circuits including a microcomputer,
From the pump 2 and the three-way valve 3a,
3b is controlled. 17 is a pump drive circuit for driving the pump 2, 18 is a three-way valve drive circuit for driving the three-way valves 3a and 3b, 19 is an AC power supply for supplying power to the water level sensor 10, 20 is a rectifier, 21 is a resistor, and 22 is a resistor. It is a capacitor.

Next, the operation will be described. That is, when the pump start switch 15 is turned on, the control unit 16
The L signal is input to P1, and the pump start signal is output to the output P2 to start the pump 2. Next, start switch 1
When the switch 5 is turned on, a stop signal is output to the output P2 of the control unit 16, and the pump 2 stops. An AC voltage (8 VAC) is constantly applied to the water level sensor 10 from an AC power supply 19. Now, when there is no hot water, the gap between the electrodes of the water level sensor 10 is open, no current flows, and the input P0 of the control unit 16 does not flow.
Input voltage is 0V. When hot water is supplied to the bathtub 1 and the electrodes of the water level sensor 10 are submerged, an alternating current flows through the water between the electrodes and is rectified and smoothed by the rectifier 20 and the capacitor 22, and a DC voltage is input to the input P0 of the control unit 16. You. The DC voltage of the input P0 is subjected to A / D conversion inside the control unit 16 to determine whether or not the water level sensor 10 is exposed to hot water. Now, when there is no hot water in bathtub 1,
When hot water is supplied and the electrodes of the water level sensor 10 are submerged, a DC voltage is applied to the input P0 of the control unit 16 and the control unit 1
It is detected that hot water has been supplied inside 6. Here, the pump start switch 15 also serving as a bubble switch is turned on.
When N, the pump start signal and the three-way valve start signal are output from the output P2 and the output P3 of the control unit 16, and the pump 2 is started, and the three-way valves 3a and 3b are switched to the washing side, and the filter 5 is washed. A bubble is injected into the bathtub 1. The internal timer of the control unit 16 is set to 1 minute for the first time after detecting the water level, and thereafter to 15 seconds. The microcomputer timer stops the three-way valve activation signal of the output P3, and the three-way valve 3
a and 3b are switched to the bubble / filtration operation side, the cleaning operation is ended, and the bubble / filtration operation is continuously performed. The washing operation is performed for one minute only when the first bubble switch 15 in which hot water is supplied to the bathtub 1 is turned on, and thereafter, as long as the hot water is not drained, only the amount of water in the filter 5 is input every time the bubble switch 15 is input. Automatically performed for about 15 seconds each, bubbles, cleaning operation ⇒
Bubble, filtration operation ⇒ Repeat the stop operation. Pump 2
When the water level drops during operation of the pump and the gap between the electrodes of the water level sensor 10 is opened, the pump operation signal from the output P2 of the control unit 16 stops to stop the pump 2 in order to prevent the pump 2 from running idle. .

Next, the operation will be described with reference to FIG. 2. First, the presence or absence of hot water is checked by the water level sensor 10. Next, if there is hot water, it is determined whether it is the first time, and if it is the first time, the cleaning operation is started by turning on the bubble switch 15, and after one minute has passed, the bubble and filtration operation is performed. Thereafter, as long as the water level does not decrease, the bubble switch 15 is turned on and off.
The washing operation is performed by the amount of water in the filter 5 every time, and the operation of air bubbles, washing operation 気 air bubbles, filtration operation 停止 stop is repeated. When the water level drops, it is determined whether the air bubble operation or the backwash operation is being performed at that time, and the operation is stopped according to the operation mode.

[0012]

As is clear from the above embodiment, in the bath tub water purifying apparatus of the present invention, the control means performs the backwashing of the filter for a certain period of time at the time of the first air bubble injection after the water level sensor is activated, and at the same time from the next time. The drainage time corresponding to the amount of water in the filter is performed for each bubble injection, and the filter is backwashed. With this configuration, the circulation filtration operation can be performed even when the water level sensor does not operate. In addition, the filter medium can be sufficiently washed, the bad smell of the hot water in the filter can be prevented, and the temperature of the bathtub water does not decrease, and the practical value is remarkable.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a bathtub water purification device according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of the bathtub water purification device.

FIG. 3 is a system configuration diagram of a conventional bathtub water purification device.

FIG. 4 is an operation flowchart of the bathtub water purification device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Pump 3a, 3b Three-way valve 5 Filter 10 Water level sensor 16 Control part (control means)

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masashi Yamaguchi 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-7008 (JP, A) JP-A-3-90611 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 35/027 A47K 3 / 00 A61H 23/00 520 F24H 9/00

Claims (1)

(57) [Claims] 1. A bathtub, a pump for circulating hot and cold water in the bathtub, a filter for filtering the bathtub water, a water level sensor for detecting a water level of the bathtub water, a bubble jet, a circulation filtration and a backwashing of the filter. A three-way valve for switching, comprising control means for controlling the operation of the pump and the three-way valve based on the signal of the water level sensor, the control means after the water level sensor operates,
A bath tub water purification apparatus configured to perform backwashing of the filter for a certain period of time during the first bubble injection and perform backwashing of the filter for a drainage time corresponding to the amount of water in the filter for each subsequent bubble injection. .