JPH04122363A - Jet bath pump with filter - Google Patents

Abstract

PURPOSE:To improve ease of handling by arranging a control section to drive a pump and a three-way valve so that a back washing of a filter is performed at least once to accomplish a backwashing of a filter medium of the filter automatically with clean water. CONSTITUTION:When a bath tub 1 is filled with water and electrodes 23 and 23 of a water level sensor 6 submerges, a current flows through the water and a Dc voltage rectified and smoothed with a rectifier 19 and a capacitor 22 is inputted into an input P0 of a microcomputer 15 to be converted into analog from digital, which allows the detection of water filling the bath tub 1. When the water level of the bath tub 1 reaches a specified value, it is judged whether or not the water reaches the specified level first. If it reaches the level first, a pump drive signal and a three-way valve drive signal are outputted from outputs P2 and P3 of the microcomputer 15 to start a pump 5 while the three-way valves 7 and 7 are switched over to a backwashing position to perform a backwashing of a filter 9. Thereafter, when one minute passes, the pump 5 is stopped while the three-way valves 7 and 7 are switched over to the positions of jetting bubbles and filtration in circulation to stop the backwashing operation. This enables the backwashing of a filter medium of the filter automatically with clean water thereby improving ease of handling.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a jet bath pump with a filter that injects bubbles into a bathtub and at the same time circulates and filters hot water in the bathtub.

BACKGROUND OF THE INVENTION In recent years, diesotovanu pumps with filters that spray bubbles into the bathtub and at the same time circulate and filter the hot water in the bathtub have become widespread, and there is a demand for improved usability.

Conventionally, this type of filter-equipped jet bath bomb has generally had a configuration as shown in FIG. 4. The configuration will be explained below.

As shown in the figure, a bathtub 1 is provided with a suction port 2 and a discharge port 3, a pump 5 and a water level sensor 6 are provided in a pipe 4 between the suction port 2 and the discharge port 30, and three-way valves 7, 7 are provided. A filter 9 having a filter medium 8 is provided through the filter. The control unit 1o includes a water level sensor 6, a bubble switch 11, and a cleaning switch 12.
The signal is inputted to control the operation of the pump 6 and to switch the three-way valve 7. Note that 13 is a drain port.

To explain the operation in the above configuration, the bubble switch 11
When turned on, a pump drive signal is output from the control unit 10 and the pump 5 is started. When the pump 6 starts, the bathtub 1
The hot water is sucked in through the suction port 2, flows as shown by the solid line arrow, and injects air bubbles from the spout 3. At the same time, the hot water that passes through the filter 9 is filtered and discharged from the spout 3 into the bathtub. Perform circulating filtration of the hot water in Step 11. At this time, the filter medium 8 of the filter 9 gradually becomes dirty as filtration is performed, so it is necessary to periodically backwash the filter medium 8. Therefore, cleaning switch 1
2 is turned on, a pump drive signal and a switching signal for the three-way valve 7.7 are output from the control unit 1o, and at the same time as the pump 5 starts, the three-way valve 7.7 is switched, and the hot water in the bathtub 1 flows as indicated by the dashed arrow. Inlet 2. Filter 9. Filter medium 8. Drain port 13
Water is drained through the filter medium 8 to backwash the filter medium 8.

Note that when the hot water in the bathtub 1 is drained and the water level sensor 6 is activated, the pump 5 is stopped to prevent the pump 5 from running idle.

Problems to be Solved by the Invention In such a conventional jet pump with a filter, it is necessary to periodically clean the filter medium 8 of the filter 9 by operating the cleaning tip 12 in one motion. It is inconvenient to use,
Further, when backwashing is performed with dirty hot water in the bathtub 1, there is a problem in that dirt and the like accumulate under the filter medium 8 and are drained into the bathtub 1 during the next operation.

The present invention solves the above-mentioned problems, and aims to improve usability by automatically backwashing the filter medium of a filter with clean water.

Means for Solving the Problems In order to achieve the above object, the present invention provides a control unit that controls the operation of the pump and the three-way valve to backwash the filter at least once after the water level sensor that detects the water level in the bathtub is activated. The solution to this problem is to drive the pump and three-way valve to do this.

Function: The present invention uses the above-mentioned problem-solving means to allow clean water to flow back through the filter medium of the filter, without causing dirt or other debris to build up at the bottom of the filter medium, and to automatically refill water every time the bathtub is filled with water. Backwashing is possible, allowing bubble operation with always clean water.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. Note that components having the same configuration as those of the conventional example are given the same reference numerals, and description thereof will be omitted.

As shown in the figure, the control unit 14 receives signals from the water level sensor 6 and the air bubble nuinoch 11, and controls the operation of the pump 5 and three-way valves 7, 7.
15, a pump drive circuit 16 that drives the pump 6, and a three-way valve drive circuit 17 that drives the three-way valve 7.7. The pump 5 and three-way valves 7, 7 are driven to perform backwashing. In addition, 18 is an AC power supply that supplies current to the water level sensor 6, 19 is a rectifier, and 2
0.21 is a resistor, and 22 is a capacitor.

The operation of the above configuration will be explained with reference to FIG.

The water level sensor 6 is always connected to an AC voltage (sV) from an AC power supply 18.
Ac) is being applied, and in the area where there is no water, the electrodes 23 and 23 constituting the water level sensor 6 are open and no current flows, and the input voltage to the input Pro of the microcomputer 15 is Ov. When the bathtub 1 is filled with water, the electrode 23.2 of the water level sensor 6
When the rectifier 19.3 is submerged in water, current flows through the water, and the rectifier 19.3 is submerged in water. The DC voltage rectified and smoothed by the capacitor 22 is input to the input P0 of the microcomputer 15. The microcomputer 15 inputs P internally. The DC voltage is converted to DA to detect that the bathtub 1 is filled with water. When the water level of the bathtub 1 reaches a predetermined water level, it is determined whether or not it is the first time, and if it is the first time, the backwash operation is started. That is, the output P2 of the microcomputer 16. P
3 outputs a pump drive signal and a three-way valve drive signal,
The pump 5 is started, the three-way valves 7 are turned to the backwash side, and the filter 9 is backwashed. After that, microcomputer 15
When one minute elapses according to the internal timer of P2. P3
The pump drive signal and the three-way valve drive signal are stopped, the pump 5 is stopped, the three-way valve 7.7 is switched to the bubble injection and circulation filtration side, and the backwash operation is stopped. The backwash operation is performed the first time the bathtub 1 is filled with water, and from then on, as long as the water level does not drop, according to the operation of the bubble switch 11,
Repeat ON and OFF of bubble injection and circulation filtration operation.

That is, when the bubble switch 11 is turned on, the microcomputer 15
When the “L” signal is input to the input P1 of
A pump stop signal is output to the output of the pump 6, and the pump 6 is stopped. When the water level decreases, it is determined at that point whether the bubbling operation is in progress or the backwashing operation is in progress. If the bubbling operation is in progress, the bubbling operation is stopped, and if it is in the backwashing operation, the backwashing operation is stopped.

Effects of the Invention As is clear from the above embodiments, according to the present invention, after the water level sensor that detects the water level in the bathtub is activated, the control unit that controls the operation of the pump and the three-way valve backwashes the filter at least once. Since the pump and three-way valve are driven to perform this process, when the bathtub is filled with water, the filter media of the filter can be automatically backwashed with clean water, eliminating the need for backwashing and making it easy to use. can be improved. In addition, if you combine it with a water heater with an automatic hot water supply function, the amount of hot water supplied will be constant even when automatic backwashing is performed, making it even more convenient.

[Brief explanation of the drawing]

Figure 1 is a system diagram of a jet-pass pump with a filter according to an embodiment of the present invention, Figure 2 is a circuit diagram of the control section of the jet-pass pump with a filter, and Figure 3 is a diagram of the jet-pass pump with a filter. FIG. 4 is a system diagram of a conventional jet bath pump with a filter. 1... Bathtub, 6... Pump, 6...
...Water level sensor, 7...Three-way valve, 8...
... Filter material, 9 ... Filter, 14 ... Control section. Name of agent: Patent attorney Akira Okaji and two others

Claims (1)

[Claims] A pump that injects air bubbles into the bathtub, performs circulation filtration, and backwashes the filter medium of the filter, a filter that filters dirty hot water in the bathtub, a water level sensor that detects the water level in the bathtub, and air injection and circulation filtration. and a three-way valve that switches cleaning of the filter, and a control unit that controls the operation of the pump and the three-way valve, and the control unit controls the pump so that the filter is backwashed at least once after the water level sensor is activated. and a jet bath pump with a filter that drives a three-way valve.