JPH037159A - Control circuit for bubble generating bathtub - Google Patents

Abstract

PURPOSE:To prevent electric shock by eliminating possibility of driving a nozzle and a motor-driven three-way valve simultaneously, and thereby eliminating possibility of generation of a potential difference between the nozzle and three-way valve even though they are in continuity with the bathing hot water simultaneously as the worst case. CONSTITUTION:Possibility of simultaneous flow of the drive current to relays R1, R2 is eliminated, and the forward and return paths of the applicable circuitry are turned on only when a nozzle motor M1 or a motor-driven three-way valve 45 are to be driven, wherein simultaneous turning-on of the forward and return paths d1, d2 in connection with the nozzle motor M1 and the forward and return paths d3, d4 in connection with the three-way valve 45 is prohibited. For the nozzle motor M1 and three-way valve 45 not being driven, therefore, both the forward and return paths to/from a control device C are turned off to establish the prefect insulated condition relative to the control device C, and even if the nozzle motor M1 and three- way valve 45 are in continuity with the bathing hot water simultaneously as the worst case, possible path for the leak current will be shut by either of the relays R1, R2, so that no potential difference will be generated between these two members. Thus electrical shocks can be prescluded.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a control device for a bubble generating bathtub.

(b) Conventional technology In the past, a bath water suction channel and a bath water forced flow channel were interposed between the bathtub body and a bath water circulation pump installed outside the bathtub body. A jet nozzle provided at the end of the passage is opened into the bathtub body, and an air intake part is connected to the bathwater forced flow passage, so that bathwater mixed with air bubbles is spouted into the bathtub body. There is a bubbly bathtub.

Recently, the opening degree of the above-mentioned jet nozzle can be electrically adjusted to adjust the strength of the hot water spout, and a filter has been connected to the circulation pump via an electric three-way valve. By operating the electric three-way valve, filtration and
A device has been developed that allows backwashing to be switched.

(C) Problem to be Solved by the Invention However, if the insulation is damaged due to flooding etc. and the jet nozzle and the electric three-way valve are simultaneously connected to the bath water, a current flows into the bath water between the jet nozzle and the electric three-way valve. There was a risk of electric shock to those bathing in the bath.

(d) Means for Solving the Problems In the present invention, a bath water suction flow path and a bath water bomb delivery flow path are interposed between the bathtub body and a bath water circulation pump installed outside the bathtub body. A spouting nozzle provided at the end thereof is opened into the bathtub body, and an air intake part is connected to the bathwater supply flow path, so that bathwater mixed with air bubbles is spouted into the bathtub body. and in a bubble generating bathtub in which the opening degree of the spout nozzle can be electrically adjusted, and a bath water circulation pump and a filter are connected in communication via an electric three-way valve, the spout nozzle and the electric three-way valve are provided. It is an object of the present invention to provide a control device for a bubble-generating bathtub, characterized in that the and are not driven at the same time.

(E) Functions and Effects According to the present invention, even if the jet nozzle and the electric three-way valve are electrically connected to the bath water at the same time, the jet nozzle and the electric three-way valve are not driven at the same time. No potential difference occurs between the electric three-way valve and the electric shock can be prevented.

(F) Example An example of the present invention will be explained based on the drawings. In Figs. 1 and 2, (^) indicates a bubble-generating bathtub according to the present invention, and the bubble-generating bathtub (A) is The bathtub body (1) and the bath water circulation pump installed outside the bathtub body (1) (
2), there is a bath water suction flow path (3) and a bath water bullet feed flow path (4).
), and the terminal end of the bath water bullet feeding channel (4) is branched into six, and the foot side, dorsal side, and ventral side are provided at each terminal end of the branched bath water bullet feeding channel (4). Side jet nozzle (5) (5), (B)
(6), (7) (7) are connected and connected, and the same foot side, dorsal side, and ventral side jet nozzles (5) (5), (6) (8), (7)
(7), the bath water bullet feeding channel (4) is opened into the bathtub body (1), and the air intake part (8) is connected to the bath water filling channel (4). , is configured to eject bath water mixed with air bubbles into the bathtub body (1,).

Further, a rim (9) of a predetermined width is formed on the periphery of the bathtub body (1), and an air intake portion (8) is provided in the rim (9).

In addition, a pump protective case (10) is attached to the outside of the bathtub body (1).
), and the above-mentioned circulation pump (2) and filter (
11), a control device (C), an inverter (13),
It houses these accessory devices.

As shown in Fig. 3, the circulation pump (2) has a motor section (
2 [) and a pump section (22), the motor section (21) is a three-phase induction motor, and a field (20) is disposed in the motor casing (23), and the same field (24)
A winding (25) is wound around the winding (25), an AC voltage is applied to the winding (25) to generate a rotating magnetic field, and a box-shaped rotor (2B) is inserted into the motor casing (23) on the output shaft (27 )
The rotation speed of the output shaft (27) can be adjusted by changing the rotation speed of the rotating magnetic field using an inverter (13), which will be described later.

The pump part (22) has inside the pump casing (28),
An upper impeller chamber (29) that communicates with the bath water suction channel (3) and the filter (11,), and a lower impeller chamber that communicates with the bath water suction channel (3) and the bath water bullet feed channel (4). Impeller room (30
), and upper and lower impeller chambers (29) (30
) inside the upper and lower impellers (31) and (32
) is rotatably arranged and interlocked with the output shaft (27).

Further, as shown in the figure, an insulating plate (33) made of synthetic resin is interposed between the motor casing (23) and the pump casing (28), and the motor casing (23) is connected to the motor casing (23) via the field (20). The pump casing (28) prevents high-frequency current from leaking into the bath water via the pump casing (28), and the upper and lower impellers (31) and (32) are integrally constructed of a synthetic resin material with electrical insulation properties. , the same impeller (
! 31) Extend the center shaft (30) of (32) upward, drill an output shaft insertion hole (35) at the upper end of the coaxial (30), and insert the output shaft of the motor section (21) into the circumference (35). (27) is inserted and fixed, and a mechanical seal (36) is interposed between the upper part of the casing (28) and the central axis (34) to prevent water leakage. Axis (3
4) electrically insulates the pump section (22) and motor section (21).

The inverter (13), as shown in FIGS. 4 and 5,
Convert single-phase AC 100V from the commercial power supply (37) to DC 200V using the rectifier circuit (38) and smoothing circuit (F),
The output frequency of the inverter (13) can be changed arbitrarily by supplying it to the switching circuit (39) and controlling the switching circuit (39) with the control device (C) via the inverter-controlled tH circuit (I2). can.

Therefore, under control from the control device (C), the rotation speed of the circulation pump (2) can be changed to change the discharge pressure and discharge amount of the pump (2).

In addition, by PWM controlling the output waveform of the inverter, the average value of the output waveform is approximated to a sine waveform,
The motor section (21) rotates smoothly.

In addition, in this embodiment, each jet nozzle (5) (6) (
7) has the same configuration, and will be explained with reference to FIG. 6, taking the foot side jet nozzle (5) as an example.

The foot side jet nozzle (5) includes a cylindrical nozzle body (70) fitted into the side wall of the bathtub body (1), and a nozzle body (70) fitted into the side wall of the bathtub body (1).
0), a valve body (72) provided behind the valve seat (71), a nozzle motor (old) that moves the valve body (72) forward and backward, and the valve It consists of a swingable throw 1-(73) provided in front of the seat (7I).

The nozzle body (70) has a hot water bomb feed channel (4) at the rear thereof.
), and the valve body (72) is brought into contact with and separated from the valve seat (7I) to adjust the jetting m and jetting pressure of bath water from the nozzle (5), and an air vent is installed on the central peripheral wall. Open the air inlet (74) that communicates with the inlet (8), and then open the valve seat (71).
Due to the ejector effect of the bath water that has passed through the bathtub body (1
) is configured to mix air into the bath water that spouts out.

The nozzle motor (old) consists of a stepping motor attached to the rear wall of the nozzle body (7o) and a ball screw that converts the rotational motion of the motor into linear motion and transmits it to the valve body (72). A valve position sensor (75) for detecting the position of the valve body (72) is disposed at the rear end.

The nozzle motor (old) is connected to the control device (C) described below, and is driven by a pulsed control current output from the control device (C). (old).

As shown in Figure 7, the control device (C) includes a microprocessor (MPU) and an input/output interface (+) (0
) and a memory (M) storing the #i control program. (p) and the operation panel section (
14) The operation of the bubble generating bath iff (A) installed in
Various switches (50) for turning on/off, adjusting the intensity of the hot water jet from each spout nozzle, specifying the spout form of the hot water, and specifying the nozzle from which the hot water is spouted.
(50)... are connected, and these sensors (t)
(p) and each jet nozzle (
5) By controlling the degree of opening and closing of (5), (6), (6), (7) and (7), the rotation speed of the circulation pump (2), etc., it is possible to take various bath water spouting forms. I have to.

By the way, as shown in Fig. 2, the filter (lt) is connected to the circulation pump (2) via an electric three-way valve (45), and the flow path is controlled by the drive output from the control device (C). By switching, the action of the filter (11) is switched to filtration, backwashing, etc.

However, in the above configuration, the nozzle motor (old)
If the insulation of the or electric three-way valve (45) is impaired and both conduct to the bath water at the same time, the control device (C) - nozzle motor (
A leakage current path is formed: M1) - Bathwater - Human body - Bathwater - Electric three-way valve (45) - Control device (C) or the above route.

In this state, the nozzle motor (Ml) and electric three-way valve (4
If 5) and 5) are driven at the same time, they will be connected via the control device (C), and there is a risk that the bather will receive an electric shock from the drive current from the control device (C).

Therefore, in this embodiment, the nozzle motor (old) and the electric three-way valve (45) are not driven at the same time to prevent electric shock.

That is, as shown in Fig. 7, the reciprocation between the control device (C) and the nozzle motor (old) and electric three-way valve (45) of each jet nozzle (5) (8) (7)... road (dt
) (R2) (R3) (R4) are relays (R
1) Interpose (1?2) and connect the relay drive line (r3)
Each relay (R1) (
R2), the nozzle motor (Ml), the electric three-way valve (45), and each relay (11) (R2) are controlled as shown in the time chart of FIG.

In the figure, ('l) is the drive current to the relay (1?I) connected to the nozzle motor (old), and ('2) is the electric three-way valve (4
5) Drive current to relay (R2) connected to (R5)
indicates the drive current to the nozzle motor (Ml), (R6) indicates the drive current to the electric three-way valve (45), and as shown in the figure, the drive current to each relay (1?I) (R2) is By not outputting at the same time, the nozzle motor (M
Only when driving the electric three-way valve (45), the reciprocating path of that circuit is ONL, and the reciprocating path (old) (R2) connected to the nozzle motor (old) and the electric three-way valve (45).
At the same time, the round trip path <R3) (R4) connected to
, I try not to.

Therefore, the nozzle motor (old) and the electric three-way valve (45) that are not being driven are completely insulated from the control device (C) with both of their reciprocating paths to and from the control device (C) turned off. In the unlikely event that the nozzle motor (Ml) and electric three-way valve (4
5) and the bath water at the same time, the path of the leakage current is blocked by either relay (1?I) (1?2), so no potential difference will occur between the two. Electric shock can be prevented.

In addition, the operation panel section (14) is provided with an infrared reception # (17) at the - side end, and a remote controller (16) is provided.
It receives control signals from the

The remote controller (1B) has an operation panel section (1
A group of switches corresponding to the various switches (50) (50)... arranged in ), the infrared signal is received by the infrared receiving section (17) of the operation panel section (10), and is input manually to the input interface (1) of the control device (C), thereby allowing the bather to perform control operations. The configuration is such that the bath water is spouted in a manner corresponding to each of the above-mentioned switches.

(8): Air intake part (13): Inverter (21): Motor part (37): m source

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a bubble-generating bathtub having a control device according to the present invention, FIG. 2 is an explanatory diagram showing the structure of the same bathtub, and FIG.
The figure is a longitudinal sectional view of the bath water circulation pump, Figure 4 is a block diagram showing the configuration of the inverter, Figure 5 is a switching circuit diagram,
FIG. 6 is a sectional view of the bath water spouting nozzle, FIG. 7 is a block diagram showing the configuration of the control device, and FIG. 8 is a drive time chart of the nozzle motor and the electric three-way valve. (^): Bubble generating bathtub (1): Bathtub body (2): Bath temperature circulation pump (3): Bath water suction flow path (4): Bath water suction flow path

Claims (1)

[Claims] 1) A bath water suction channel (3) is provided between the bathtub body (1) and a bath water circulation pump (2) installed outside the bathtub body (1).
and a bath water forced flow channel (4), and the jet nozzles (5), (6), etc. provided at the ends thereof are opened into the bathtub body (1), and the bath water forced flow is provided. Air intake part (8
) are connected to the bathtub body (1) to supply bath water mixed with air bubbles.
The above-mentioned jet nozzles (5), (6) and
In a bubble-generating bathtub (A), the opening degree of which can be electrically adjusted, and a bath water circulation pump (2) and a filter (11) are connected in communication via an electric three-way valve (45), The above jet nozzles (5), (6)... and the electric three-way valve (45)
) and not driven at the same time.