JPH034867A - Ejecting nozzle driving circuit for bubble generating bathtub - Google Patents

Abstract

PURPOSE:To prevent a bathing person from getting an electric shock even when the person is brought into contact with a grounded commodity in a state that the insulation of one ejecting nozzle is broken and the nozzle is conducted with hot water for bathing by interrupting the route of an earth leakage current with an insulating transformer by providing the insulating transformer between a controller and each emitting nozzle. CONSTITUTION:Insulating transformers 40a are interposed between nozzle motors M1 of respective ejecting nozzles 5, 6, 6 and 7 and a controller C so that only a pulse- shaped control current can be transmitted from the controller C to the nozzle motors M1. For the insulating transformer 40, a primary side coil 41a and a secondary side coil 42a are not connected but completely insulated and capacity coupling between both coils 41a and 42a is reduced as much as possible so that the high frequency current can hardly flow between the primary side and secondary side. Thus, by interposing the insulating transformer 40 between the controller C and nozzle motors M1, the current is prevented from flowing into the hot water for bathing in the main body 1 of a bathtub and the bating person is prevented from getting the electric shock even when the earth leakage is generated in one nozzle motor M1 since the route of the leaking current is interrupted by the insulating transformer 40a.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a jet nozzle drive circuit 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 spouting 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 bath water mixed with air bubbles is spouted into the bathtub body. There is a bubbly bathtub.

Also, recently, a device has been developed in which the opening degree of the above-mentioned jet nozzle is electrically adjusted to adjust the strength of the hot water jet.

(C) Problems to be Solved by the Invention However, in the case where the opening degree of the ejection nozzle can be electrically adjusted, the control device and the drive circuit are electrically connected to the actuator of the nozzle. If the insulation is broken due to water intrusion and the actuator is electrically connected to the bath water, a leakage current path is formed between the actuator and the ground through the control device and/or drive circuit, and this leakage current flows into the bath water in the bathtub body. There is a risk of electrocution if bathers come into contact with grounded objects.

Furthermore, if two or more of the plurality of ejection nozzles leak current, current will flow between these nozzles and there is a risk of electric shock.

(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. The bath water forced flow path is branched into a plurality of parts, and the jet nozzle provided at the end thereof is opened into the bathtub body.
An air intake part is connected to the bath water forced flow channel to spray bubble-mixed bath water into the bathtub body, and the opening degree of the spray nozzle can be electrically adjusted. It is an object of the present invention to provide a blowout nozzle drive circuit for a bubble-generating bathtub, characterized in that an insulation transformer is interposed between the blowout nozzle and a control device for driving the blowout nozzle. .

(E) Functions and Effects According to the present invention, an insulation transformer is interposed between the control device and each jet nozzle, so that in the unlikely event that the insulation of one jet nozzle is broken and it becomes electrically connected to the bath water. So, even if a bather comes into contact with a grounded item, will the aforementioned leak occur? Electric shock is prevented because the I current path is blocked by an isolation transformer.

Also, even if multiple jet nozzles are connected to the bath water at the same time,
Since the current path between each jet nozzle is interrupted by an insulating transformer, no leakage current flows into the bath water, thereby preventing electric shock to the bather.

(F) Example An example of the present invention will be explained based on the drawings. In FIGS. 1 and 2, (A) shows 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 forced flow path (4).
), the terminal end of the bath water forced flow channel (4) is branched into six, and the foot side, dorsal side, and ventral side are provided at each end of the branched bath water forced flow channel (4). Side jet nozzle (5) (5), (6) (
6), (7) (7) are connected and connected, and the same foot side, dorsal side, and ventral side jet nozzles (5) (5) <8) ([1) (7)
(7), the bath water forced flow path (4) is connected to the bathtub 9 body (1).
At the same time, an air intake part (8) is connected to the bath water forced flow channel (4) so that the 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).

In addition, a pump protective case (lO
), 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 (
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
), and an alternating current voltage is applied to the winding (25) to generate a rotating magnetic field, and a cylindrical rotor (26) is inserted into the motor casing (23) on the output shaft ( 27
), 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 (11), and a lower impeller that communicates with the bath water suction channel (3) and the forced bath water flow channel (4). The upper and lower impellers (31 and 32) are rotatably arranged in the upper and lower impeller chambers (29 and 30), respectively, and are interlocked and connected to the output shaft (27). are doing.

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, the central shaft (34) of the impeller (31) (32) is extended upward, an output shaft insertion hole (35) is bored at the upper end of the coaxial shaft (34), and the motor is inserted into the circular shaft (35). Output shaft (27) of section (21)
Insert and secure the upper part of the casing (28) and the center shaft (3).
A mechanical seal (36) is interposed between the pump part (22) and the motor part (21) to prevent water leakage, and a central shaft (34) made of electrically insulating synthetic resin
) 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 with 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 control circuit (12). .

Therefore, the rotation speed of the circulation pump (2) is changed by the control from the control device (C').
) can change the discharge pressure and discharge amount.

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

However, as described above, the AC power output from the inverter (13) contains a large number of high frequency components, and these high frequency components are transmitted to the motor section (21).
) leaks into the bath water through the capacitive coupling between the field (24) and the winding (25), and if the grounding of the motor section (21) is incomplete, the motor section (21) and the commercial power supply (37 ), a high-frequency current path is created through the body of the bather, and there is a risk that the high-frequency current as described above will flow through the bathing water and cause an electric shock to the bather.

Furthermore, in this embodiment, each jet nozzle (5) (8)
(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 (Ml) that moves the valve body (72) forward and backward, and the valve It consists of a swingable throat (73) provided in front of the 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). 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 so that air is mixed 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 (70) 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 (Ml) is controlled by a control device (
C), and is driven by a pulsed control current output from the control device (C), so that the nozzle motor (old) is advanced by the number of pulses mentioned above.

As shown in FIG. 7, the control device (C) includes a microprocessor (MPU) and input/output interfaces (1) (0
) and a memory (M) that stores a control program, and the input interface (+) includes a temperature sensor (1) and a pressure sensor (p) installed in the bath water forced flow channel (4). ) and the operation panel section (
14) The operation of the bubble generating bathtub (A) installed in
FFL, various functions such as adjusting the strength of the hot water spout from each spout nozzle ('5) (8) (7), specifying the spout form of the bath water, and specifying the nozzle that spouts the bath water. It is connected to switches (50) (50)..., and each ejection nozzle (5) (5) (6) (8) (7) is controlled by human power from these sensors (t) (p) and the switch group.
By controlling the degree of opening and closing of (7), the rotation speed of the circulation pump (2), etc., it is possible to take various forms of hot water spouting.

The filter (11) is connected to a circulation pump (2) as shown in FIG.
) is connected via an electric three-way valve (45), and the flow path is switched by the drive output from the control device (C) to switch the action of the filter (11) to filtration, backwashing, stop, etc. That's what I do.

However, in the above configuration, since the control device (C) and the nozzle motor (old) are connected, if the insulation of the nozzle motor (Ml) is impaired and a current leakage occurs, each jet nozzle is (5) (5) (8) (6) (7
) There is a risk that the water will flow from (7) into the bath water in the bathtub body (1) and cause an electric shock to the bather. In particular, if two or more of the multiple jet nozzles leak electricity at the same time,
Electric current flows between these jet nozzles, resulting in an electric shock.

Therefore, in this embodiment, each jet nozzle (5) (5) (6)
(B) (7) An insulating transformer (40a) is interposed between the nozzle motor (Ml) of (7) and the control device (C), and only the above-mentioned pulsed control @J current is controlled by the control device (C). ) to the nozzle motor (old).

As shown in FIG. 8, the isolation transformer (40) has a secondary winding (41a) and a secondary winding (42a) that are not connected and are completely insulated. 4La) (4
2a) The capacitive coupling between the two is made as small as possible to make it difficult for high frequency current to flow between the primary side and the secondary side.

In this way, by interposing the insulation transformer (40) between the control device (C) and the nozzle motor (old), even if one nozzle motor (old) leaks, the insulation transformer (40a)
), so you won't get an electric shock even if you come into contact with a grounded item, and even if multiple nozzle motors (old) leak at the same time, these nozzle motors ( The bathtub body (1) is insulated between
This prevents electric current from flowing into the bath water and prevents electric shock.

Further, the operation panel section (14) is provided with an infrared receiving section ([7] 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
4) Various switches (50) (50)...
By operating the switch group, an infrared signal set for each switch is transmitted from the infrared irradiation section (15), and the same infrared signal is transmitted to the infrared rays of the operation panel section (14). By receiving the information in the receiving section (17) and inputting it to the input interface (1) of the control bag Z (C), the control operation from the bather is accepted and the spouting form of the bath water corresponding to each of the above switches is set. It is configured to take

(A) (1) <2> (3) (4) (8) (13) (21) (37) bubble generating bathtub bathtub body circulation pump Bath water suction channel Bath water forced flow path air intake inverter Motor part power supply

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is an overall perspective view of a bubble-generating bathtub having a jet nozzle drive circuit according to the present invention, Fig. 2 is an explanatory diagram showing the structure of the bathtub, and Fig. 3 is a longitudinal section of a circulation pump. Figure 4 is a block diagram showing the configuration of the inverter, Figure 5 is a switching circuit diagram, Figure 6 is a sectional view of the bath water spout nozzle, Figure 7 is a block diagram showing the configuration of the control device, and Figure 8 is a block diagram showing the configuration of the inverter. is an equivalent circuit diagram of an isolation transformer.

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 branched into multiple parts, and a jet nozzle (5
)(6)... is opened into the bathtub body (1), and the air intake part (8) is connected to the bathwater forced flow channel (4), so that the bathwater mixed with air bubbles is poured into the bathtub. In a bubble generating bathtub (A) configured to emit air into the main body (1), and configured to be able to electrically adjust the opening degrees of the ejection nozzles (5), (6), etc., the ejection nozzle (5) (6) ...and the jet nozzle (5
) (6) A blowout nozzle drive circuit for a bubble generating bathtub, characterized in that an insulating transformer (40a) is interposed between each of the control device (C) for driving the above.