JPH05285315A - Bathtub water purifier - Google Patents

Abstract

PURPOSE:To perform circulating filtration operation where a filter medium of a filter is sufficiently washed and malodor of warm water in the filter is prevented and the temp. of bathtub water is not lowered even when a water level sensor is not operated in a bathtub water purifier backwashing the filter. CONSTITUTION:Three-way valves 3a, 3b provides for switching between bubble jetting, circulating filtration and filter backwashing and a water level sensor 10 detects the level of bathtub water. A control part 16 is constituted of various electronic circuits contg. a microcomputer and takes in a signal from the water level sensor 10 to control the operation of a pump 2 and the three-way valves 3a, 3b. And when the water level sensor 10 inputs a start signal to the control part 16, the filter is backwashed for a specific time on the first bubble jetting and besides, the filter is backwashed for a drain time corresponding to the quantity of water in the filter on each bubble jetting from the next time.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, bathtubs having a bathtub water purifying device have been used to save water.

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

Next, the operation will be described with reference to FIGS. 3 and 4. That is, when the pump start switch 15 is turned on, a pump operation signal is output from the control unit 11 and the pump 2 is started. When the pump 2 starts up, as shown by arrow A,
Hot and cold water in the bathtub 1 is sucked in through the suction port 12 and jets bubbles through the discharge port 13 and, at the same time, is supplied to the filter 5 through the upper running water pipe 8 through the three-way valve 3a. After being discharged to the bathtub 1 through the pipe 9 and the pump 2, a part of the discharge flows from the upper flowing water pipe 8 to the lower flowing water pipe 9 filtering line, and a circulation filtration operation is performed. The filter medium 6 gradually becomes dirty as it is filtered, and the filter material 5 accumulates and the performance of the filter 5 deteriorates. Therefore, the filter medium 6 is regularly washed with bath water. The water level sensor 10 detects once the bath water is drained, and the water level sensor 10 detects when the water is newly supplied to the bathtub 1, and when the first activation switch 15 is turned on, the pump operating signal and A three-way valve switching signal is output. At the same time as the pump 2 is started, the three-way valves 3a and 3b are switched, and the hot and cold water of the bathtub 1 is sucked in from the suction port 12 as shown by an arrow B,
Air bubbles are jetted from the discharge port 13, and at the same time, they are supplied to the filter 5 from the lower running water pipe 9 through the three-way valve 3b to wash the filter bed 7. At this time, the granular filter medium 6 is put into a fluid state to remove the scale and dust, and is drained from the discharge port 14 through the upper flow pipe 8 and the three-way valve 3a, and the cleaning is continued for a predetermined time. After the cleaning 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 an 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, since it is possible to inject air bubbles into the bathtub 1 and to circulate and filter the bathtub water at the same time, the bathtub water is not contaminated during the day's use, and the bathtub is the next day. The water may not be drained and may be bathed with additional water. Therefore, the water level sensor 10 does not operate, and the backwashing of the filter medium 6 of the filter 5 is not performed every day.
Is gradually soiled, and the filtered material cannot be completely removed from the filter 5 by backwashing the filter material 6 once, and the performance of the filter 5 deteriorates.
A bad odor is generated in the hot water inside. Further, the temperature of the hot and cold water in the filter 5 decreases unless the pump 2 is operated. Especially in the winter, the temperature of the hot and cold water in the filter 5 significantly decreases, and the temperature in the filter 5 decreases as the bubbles are injected into the bathtub 1. There was a problem that the hot water flowed, causing a decrease in the bath water temperature.

The present invention solves the above-mentioned conventional problems. Even when the water level sensor does not operate, the filter material of the filter can be sufficiently washed, the odor of hot water in the filter can be prevented, and the water temperature of the bath water can be prevented. It is an object of the present invention to provide a bathtub water purifying device capable of performing a circulating filtration operation without lowering the water flow rate.

[0007]

In order to achieve the above object, the present invention has a control means for backwashing a filter for a certain period of time at the first bubble injection after the water level sensor is activated and at the next bubble injection. Each time, the backwashing of the filter is performed for a draining time corresponding to the amount of water in the filter.

[0008]

In the above structure, when the water level sensor inputs the activation signal to the control means, the filter is backwashed for a certain period of time during the first bubble injection, and the amount of water in the filter is reduced for each subsequent 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 An 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-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted. The characteristic configuration of this 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, and the water level sensor 10
The signal from the pump 2 and the three-way valve 3a,
It controls the operation of 3b. Reference numeral 17 is a pump drive circuit that drives the pump 2, 18 is a three-way valve drive circuit that drives the three-way valves 3a and 3b, 19 is an AC power supply that supplies power to the water level sensor 10, 20 is a rectifier, 21 is a resistor, and 22 is 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 5 is turned on, a stop signal is output to the output P2 of the control unit 16 and the pump 2 is stopped. An AC voltage (8 VAC) is constantly applied to the water level sensor 10 from an AC power supply 19. Now, in the state where there is no hot water, the electrodes of the water level sensor 10 are open, no current flows, and the input P0 of the control unit 16
The input voltage to 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 to be 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. It The DC voltage of the input P0 is A / D converted inside the control unit 16 to determine whether or not the water level sensor 10 is submerged in hot water. Now that 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
Detecting that hot water has been supplied inside 6 is detected. Here, turn on the pump start switch 15 that also functions as a bubble switch.
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, the pump 2 is started and the three-way valves 3a and 3b are switched to the cleaning side, and the filter 5 is cleaned. Air bubbles are 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 15 seconds thereafter, and the three-way valve starting signal of the output P3 is stopped by the microcomputer timer, and the three-way valve 3
a and 3b are switched to the bubbles and filtration operation side, the cleaning operation is ended, and the bubbles and filtration operation are continued. The cleaning operation is performed for 1 minute only when the first bubble switch 15 in which hot water is supplied to the bathtub 1 is turned on, and thereafter, unless the hot water is drained, only the amount of water in the filter 5 is input for each input of the bubble switch 15. Approximately 15 seconds each automatically, bubble, washing operation ⇒
Bubble, filtration operation ⇒ Stop operation is repeated. Pump 2
When the water level is lowered during operation and the electrodes of the water level sensor 10 are opened, the pump operation signal from the output P2 of the control unit 16 is stopped and the pump 2 is stopped in order to prevent the pump 2 from running dry. ..

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 judged whether or not it is the first time, and if it is the first time, the bubble switch 15 is turned on to start the cleaning operation, and after 1 minute, the cleaning operation is ended, and the bubble and filtration operations are performed. After that, the bubble switch 15 turns on and off unless the water level drops.
Each time, the washing operation is performed by the amount of water in the filter 5, and the operation of bubbles, washing operation ⇒ air bubbles, filtration operation ⇒ stop is repeated. When the water level drops, it is judged at that time whether the bubble operation or the backwash operation is in progress, and the operation is stopped according to the operation mode.

[0012]

As is apparent from the above embodiments, in the bath water purifying apparatus of the present invention, the control means performs backwashing of the filter for a certain period of time during the first bubble injection after the water level sensor is activated, and from the next time. Each time air bubbles are ejected, the drainage time is equivalent to the amount of water in the filter, and the filter is backwashed.With this configuration, circulation filtration operation can be performed even when the water level sensor does not operate. The filter medium can be sufficiently washed, the bad smell of hot water in the filter can be prevented, the water temperature of the bath water does not decrease, and the practical value is remarkable.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a bath water purifying apparatus according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of the bath water purifier.

FIG. 3 is a system configuration diagram of a conventional bath water purifier.

FIG. 4 is an operation flowchart of the bath water purifier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bath 2 Pumps 3a, 3b Three-way valve 5 Filter 10 Water level sensor 16 Controller (control means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Massei Yamaguchi 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Makoto Sakai, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A bathtub, a pump for circulating hot and cold water in the bathtub, a filter for filtering the bathwater, a water level sensor for detecting the water level of the bathwater, bubble injection, circulation filtration and backwashing of the filter. A three-way valve for switching, and a 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 water purifying apparatus configured to perform backwashing of the filter for a certain period of time at the time of first bubble injection and drainage time corresponding to the amount of water in the filter for each subsequent bubble injection ..