JPH034865A - Function part case for bubble generating bathtub - Google Patents

Abstract

PURPOSE:To prevent insulation from degradation cause by wetting electric parts with water even when the water infiltrates into the internal part of a function part case and to prevent electric leakage by arranging a function part case to house a circulating pump separately from the main body of a bathtub and arranging the above-mentioned electric parts such as the motor part and controller, etc., of the circulating pump in the upper direction of the function part case. CONSTITUTION:A circulating pump 2 and an inverter 13 are housed in one function part case 10 and further, the circulating pump 2, inverter 13 and function part case 10 are mutually insulated to prevent the potential difference of a low frequency from being generated between the function case part 10 and a ground. The circulating pump 2 and inverter 13 are disposed with an enough distance from the function part case 10. Capacity coupling between the circulating pump 2 and inverter 13 and the function part case 10 is reduced and the level of a high frequency voltage to be induced in the function part case 10 is lowered. Then, even when the function part case is not completely grounded, a bathing person is prevented getting an electric shock when the person is brought into contact with the function part case.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a functional case 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. The bubble-generating bathtub is configured such that 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 bubbles is spouted into the bathtub body. be.

In addition, recently, a circulation pump has been developed in which the motor of the circulation pump is driven via an inverter so that the rotation speed of the motor can be made variable, thereby controlling the discharge pressure and discharge amount of the pump.

(C) Problems to be Solved by the Invention However, the problem arises because the functional part case that houses electrical parts such as the control device and the motor part of the circulation pump is located in a humid place near the bathtub body. Condensation is likely to form inside the functional case, and since the case is sometimes installed outdoors, it is easily exposed to the wind and rain and may be flooded, which can cause the insulation of electrical parts to deteriorate. There is a risk of electric shock if a person comes into contact with the functional part case due to current leakage.

(d) Means for Solving the Problems In the present invention, a bath water suction channel and a bath water forced flow channel are interposed between the bathtub body and a bath water circulation pump installed outside the bathtub body. Then, open the end of the bath water forced flow channel into the bathtub body.
In addition, in a bubble-generating bathtub configured to spout bath water mixed with air bubbles into the bathtub body by connecting an air intake part to the bath water filling flow path, a functional part is provided separately from the bathtub body. A case is provided, a circulation pump is arranged in the center of the case, a filter is placed on the side of the circulation pump, and electric parts such as a motor part of the circulation pump and a control device are arranged above these. The purpose is to provide a functional case for a bubble generating bath tC.

(E) Functions and Effects According to the present invention, the functional part case that houses the circulation pump is arranged separately from the bathtub body, and the electric components such as the motor part and the control device of the circulation pump are located in the functional part case. Since it is located above, even if water enters the inside of the case,
Insulation deterioration due to water wetting of the electrical components can be prevented, and electrical leakage can be prevented.

Therefore, electric shock to the bather in the bathtub body and electric shock when touching the functional part case can be prevented.

(F) Example An example of the present invention will be described based on the drawings. In FIGS. 1 and 2, (A) shows a bubble-generating bathtub according to the present invention. i (^) is a bath water suction channel (3) and a bath water forced flow channel between the bathtub body (1) and the bath water circulation pump (2) installed outside the bathtub body (1). (4), and the terminal end of the bath water forced flow channel (4) is branched into six, and each end of the branched bath water forced flow channel (4) is placed on the foot side and dorsal side, respectively. , ventral jet nozzle (5) (5)
, (6) (8), (7) (7) are connected in communication, and the same foot side, dorsal side, and ventral side jet nozzles (5) (5) (6) (6
) (7) Through (7), the bath water forced flow passage (4) is opened into the bathtub body (1), and the air intake part (8) is communicated with the bath water filling flow passage (4). They are arranged in series so that bath water mixed with air bubbles is spouted 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).

Further, a functional part case (10) is provided outside the bathtub body (1), and the above-mentioned circulation pump (2) and filter (11) are provided inside.
), a control device (C), an inverter (I3), and their accessory equipment.

As shown in Fig. 3, the circulation pump (2) has a motor section (
21) and a pump section (22), the motor section (21) is a three-phase induction motor, and a field (24) is arranged in the motor casing (23) to (24
) is wound with a winding (25), and AC voltage is applied @1 to the winding (25) to generate a rotating magnetic field, and a caught rotor (26) is output in the motor casing (23). Axis (2
7), and 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 (II), and a lower impeller that communicates with the bath water suction channel (3) and the bath water bullet feed channel (4). The upper and lower impeller chambers (29) (30) form a chamber (30).
Upper and lower impellers (31, 32) are rotatably disposed therein, respectively, and are interlocked and connected to 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 (24). ) is prevented from leaking into the bath water via the pump casing (28), and the upper and lower impellers (31) and (32) are integrally constructed from a synthetic resin material with electrical insulation properties. Then, by extending the central shafts (34) of the impellers (31) and (32) upward,
An output shaft insertion hole (35) is bored in the upper end of the coaxial (34), and the output shaft (27) of the motor section (21) is inserted and fixed into the circumference (35), and the upper part of the casing (28) and the center shaft (34
) to prevent water leakage, and a central shaft (34) made of electrically insulating synthetic resin to connect the pump part (22) and the motor part (21).
and are electrically insulated.

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 (P),
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 control circuit (12). .

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.

However, the above circulation pump (2), inverter (
13) Since the functional unit case (10) that houses the control device (C) and its accessories is located in a humid place near the bathtub body (1), the functional unit case (10)
Condensation is likely to occur inside the unit (lO), and in the worst case, there is a risk of water intrusion.

In addition, the AC power output from the inverter (13) contains a large number of high frequency components as described above, and these high frequency components interact with the field (24) of the motor section (21). If the grounding of the motor section (21) is incomplete due to leakage into the bath water through capacitive coupling between the wires (25), there will be leakage between the motor section (21) and the ground of the commercial power supply (37).
A high-frequency current path is created through the bather's body, and the above-mentioned high-frequency current flows through the bathwater, potentially causing an electric shock to the bather.

In other words, one pole of the commercial power supply (37) is always grounded to the ground, and when a bather comes into contact with a grounded item, the high frequency current generated in the inverter (13) Connection) - Functional part case (10)
- Pump part (22) - Bath water - Human body → Earthed article -
It leaks through the path of earth - commercial power supply (37) ground - wiring from commercial power supply (37) to inverter (13) -> inverter (13), causing electric shock to bathers who are intervening in the above route. .

Therefore, in the present invention, the circulation pump (2) and the inlet (
13) are housed in − functional unit cases (lO), and furthermore, the circulation pump (2), the inverter (13), and the functional unit case (10) are insulated from each other, and the functional unit case (10) is
) and ground to prevent low-frequency potential differences from occurring.
At the same time, the circulation pump (2) and the inlet (■3)
) are arranged at a sufficient distance from the functional part case (10) to reduce the capacitive coupling between the circulation pump (2), the inlet (13) and the functional part case (lO). The level of high frequency voltage induced in the functional part case (10) is lowered to prevent electric shock when the functional part case comes into contact with the functional part case even if the functional part case is incompletely grounded.

That is, as shown in FIGS. 6 and 7, a substantially rectangular base (54) is disposed at the lowest part inside a substantially box-shaped functional part case (10) that opens downward, and A circulation pump (2) is installed in the center of the circulation pump (54) with the motor section (21) above and the pump section (22) below. A flat plate-shaped chassis (41) is provided protruding from the inner surface of the functional unit case (10) at a position above the filter (11), and an insulation transformer (40) is installed on the upper surface of the chassis (41). and a capacitor (C),
The chassis (41) is extended above the circulation pump (2) in the center inside the functional part case (10), and a noise filter is installed on the upper surface of the extension part (46), that is, above the circulation pump (2). (42), a power transformer (43), an earth leakage breaker (44), and a connector (45).

Above the other side of the circulation pump (2) is an inverter (13).
The heat dissipation plate (47) is arranged so as to face the inner surface of the functional part case (10) and with a sufficient distance therebetween,
A shield, [(5
5), and a control device (C) is disposed therebetween.

In addition, the inlet (48) and outlet (4) of the circulation pump (2)
9) is provided to protrude from the front surface of the functional part case (10), and below the inverter (13) is a pipe (5) that communicates the upper impeller chamber (29) with the filter (11).
2) and a three-way valve (53) for switching between filtration and backwashing provided in the same pipe (52).

Various electrical components are housed inside the functional unit case (10) as described above, and each electrical component and the functional unit case (10) are housed inside the functional unit case (10).
0) are insulated from each other.

The above insulation can be achieved by the following means.

■ The base (54) is made of an insulating material such as synthetic resin (FRP, polypropylene, polyethylene).

■ Attach the circulation pump (2) to the base (54) via an insulator.

■ The chassis (41) is made of an insulating material.

■ When installing electrical components on the chassis (4 [), insert an insulator.

■ Paint, coat, and line the surfaces of each electrical component and the inner surface of the functional part case (10) with an insulating material.

The following methods can be used to reduce capacitive coupling.

■ Inner surface of functional part case (10) and inverter (13)
and the heat sink (I+).

(2) The circulation pump (2) is arranged in the center of the functional part case (10) to widen the distance between the motor part (21) and the functional part case (10).

■ The insulating plate (60) and shield plate (55) are made of a material with a low dielectric constant such as polypropylene, polyethylene, polytetrafluoroethylene, methylpentene resin (14
to be accomplished.

In this way, each electrical component and the table placed above the functional part case (■0), each electric component and the functional part case (10)
By insulating the casing, electrical components such as the inverter (13) and circulation pump (2) that are exposed to voltages with high frequency components are prevented from leaking due to insulation deterioration of each electrical component even if water floods into the same case. The heat dissipation plate (47) of the inverter ([3), which has a large distance between the inverter ([3]) and the functional part case (10), which has a particularly large leakage of high-frequency current, and the functional part case (10).
By keeping a large distance between the two, capacitive coupling between the two is minimized, and low-frequency and high-frequency currents do not leak into the functional unit case (10), and even if the functional unit case (10) is touched, there is no risk of electric shock. There is no fear.

In addition, in this embodiment, each jet nozzle (5) (6)
(7) has the same configuration, and will be described with reference to FIG. 8, with the foot side jet nozzle and (5) in the row.

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 (73) installed in front of a seat (71).

The nozzle body (70) has a bath water forced flow channel (4) at the rear thereof.
), and the valve body (72) is brought into contact with and separated from the valve seat (71) to adjust the amount and pressure of hot water spouted from the nozzle (5). The air intake port (74) that communicates with the inlet (8) is opened, and the valve seat (1, 7) is opened.
The ejector effect of the bath water that has passed through the bathtub body (1) causes air to be mixed into the bath water that is ejected into the bathtub body (1).

The nozzle motor (Ml) consists of a stepping motor attached to the rear wall of the nozzle body (70) and a ball screw that converts the rotational motion of the motor into linear motion and transmits it to the valve body (72). and a valve body (7
A valve body position sensor (75) is provided to detect the position of 2).

As shown in FIG. 9, the control device (C) includes a microprocessor (MPU) and input/output interfaces (1) (0
), a memory (T1) that stores a control program, and a timer (T), and the input interface (1) has a temperature sensor ( 1), the pressure sensor (p), and the operation of the bubble generating bathtub (^) installed on the operation panel section (■4) installed on the air intake section (8) as shown in Fig. 1. various switches (50) (5o) for adjusting the intensity of the hot water spout from each spout nozzle, specifying the spout form of the hot water, and specifying the nozzle from which the hot water is spouted. These sensors m(p> and switch(50
) (50) Each jet nozzle (5) is operated by human power from...
(5) (6) (6) (7) By controlling the opening/closing degree of (7), the rotation speed of the circulation pump (2), etc., various bath water spouting forms can be achieved.

Further, the operation panel section (14) is provided with an infrared receiving section (17) at the negative end thereof to receive a control signal from the remote controller (16).

The remote controller (16) has an operation panel section (1
A switch group corresponding to each of the insert switches (50) (50)... arranged in 4) is arranged, and by operating the switch group, an infrared signal set for each switch is transmitted to the infrared irradiation section ( 15), the same infrared signal is received by the infrared receiving section (17) of the Iheshi panel section ([4),
The control device (C) is configured to accept control operations from the bather through a human power interface (C) so that the bath water can be spouted in a manner corresponding to each of the switches described above.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a bubble generating bath 16 having a functional case according to the present invention, FIG. 2 is an explanatory diagram showing the structure of the same bath, FIG. Figure 5 is a block diagram showing the configuration of the inverter, Figure 6 is a side view of the functional case, Figure 7 is a plan view of the same, Figure 8 is a sectional view of the jet nozzle, and Figure 9 is the configuration of the control device. Block Diagram. (8) : (C) : (1) (2) : (3) (4) (8) (10) (11) (21) Bubble generating bathtub Condenser Bathtub body Circulation pump Bathwater suction flow path Forced flow of bathwater Flow path air intake section functional section case filtration machine motor section Fig. 4

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 forced bath water flow path (4) are interposed, and a forced bath water flow path (4) is provided.
) is opened into the bathtub body (1), and an air intake part (8) is connected to the bathwater forced flow channel (4),
In a bubble generating bathtub (A) configured to spout bath water mixed with bubbles into the bathtub body (1), a functional part case (10) is provided separated from the bathtub body (1), and the functional part case (10) is provided separately from the bathtub body (1). 10), a circulation pump (2) in the center, a filter (11) on the side of the circulation pump (2),
Above these are the motor section (21) of the circulation pump (2),
A functional part case for a bubble-generating bathtub, characterized in that electrical parts such as a control device (C) are disposed therein.