JPH02309945A - Bubble generating bathtub - Google Patents

Abstract

PURPOSE:To vary a blow type without controlling an inverter and to reduce the electric shock accident affecting to a person's life caused by a high frequency component by varying the number of poles of an induction motor for driving a circulating pump and varying the speed of revolution of the circulating pump. CONSTITUTION:An induction motor 40 which can vary the speed of revolution of a circulating pump P by varying the number of poles is used as a pump driving device M for driving the circulating pump P. Also, between the induction motor 40 and an MPU of a controller C, a pole number switch 41 is provided, and the number of revolution of the circulating pump P is varied by varying the number of poles through the pole umber switch 41, based on a control signal from the controller C, and the blow-out quantity and the blow-out pressure of bath hot water can be varied arbitrarily. In such a way, the blow type can be varied without controlling an inverter, and an electric shock accident affecting a person's life caused by a high frequency component can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a bubble-generating bathtub that is highly safe during bathing and allows inexpensive blow control.

(B) Conventional technology Conventionally, as one form of bathtub, there is a bubble-generating bathtub that is equipped with a bubble-generating device separate from the bathtub body, and the bubble-generating bathtub uses the bubble-generating device to generate bubbles in the bathtub. As a result, the air bubbles can be used to massage the body, increasing the pleasure of bathing.

That is, such a bubble-generating bathtub is provided with a spout on the side wall of the bathtub body, a circulation pump that circulates the bath water via a circulation pump is connected to the spout, and an air bubble generator is provided in the vicinity of the spout. An air suction unit is installed that can mix air into the bath water using the Kuta effect.

With this configuration, by operating the circulation pump, bath water can be spewed out from the spout on the side wall of the bathtub body, and at the time of spouting, air is sucked under negative pressure from the air suction part and poured into the bath water. By mixing air and ejecting air-mixed bath water from the spout, bubbles are generated in the bathtub and applied to the body of the bather, thereby increasing the pine surge effect.

In addition, in recent years, as described in Utility Model Application Publication No. 63-100035, it is possible to periodically change the spout force of bath water by inverter controlling an electric morph used as a pump drive device for driving a water pump. There are also proposals that can be made.

(c) Problems to be Solved by the Invention However, the above-mentioned bubble-generating bathtub still had the following drawbacks.

That is, in the above-mentioned bubble generating bathtub, when the electric motor is controlled by an inverter in order to change the ejection amount and ejection pressure of bath water, the isolation between the bathtub and the circulation pump is caused by the high frequency component generated during the switching operation of the switching element. If this is not done properly, the leakage current will flow to the bathtub side, increasing the danger to the human body.

Furthermore, since inverters are still expensive, bubble generating bathtubs are also expensive.

An object of the present invention is to provide a bubble-generating bathtub that can solve the above problems.

(d) Means for Solving the Problems The present invention provides a bath water circulation flow path consisting of a bath water suction flow path and a bath water forced flow path between the bathtub body and the circulation pump. An air intake part is connected in communication with the bath water forced flow passage, and the air taken in by the air intake part is mixed into the bath water in the bath water suction passage, and air bubbles are mixed into the bathtub body from each jet nozzle. This relates to a bubble-generating bathtub capable of spouting bath water, characterized in that the pump drive device connected to the circulation pump is formed by an induction motor whose speed can be controlled by changing the number of poles. be.

(e) Functions and Effects In the present invention, the pump drive device for driving the circulation pump is formed by an induction motor that can change the rotation speed of the circulation pump by changing the number of poles.

Therefore, as is clear from the equation shown below, by changing the number of poles, it is possible to easily change the rotation speed of the circulation pump and arbitrarily change the amount and pressure of the bath water. You can enjoy various blow types.

120・f Nw-(1-3) (Here, N: rotation speed of circulation pump P, f knee-order frequency, p: number of poles, S: slip) In addition, when changing the number of poles, inverter control It is possible to change the blowing form without performing the above, and it is possible to reduce the possibility of life-threatening electric shock accidents caused by high frequency components as much as possible.

Furthermore, since an expensive inverter is not required, the bubble-generating bathtub can be manufactured inexpensively.

(F) Example Hereinafter, the bubble-generating bathtub A according to the present invention will be specifically explained with reference to the example shown in the attached drawings.

FIGS. 1 and 2 show the overall structure of the bubble-generating bathtub A. The bubble-generating bathtub A has foot-side spouts on the front and rear walls and left and right side walls of the bathtub body 1, which is formed into a box shape with an opening on the top. Nozzle 2. A dorsal side jet nozzle 3 and a ventral side jet nozzle 4 are provided.

The bathtub body 1 has a flange-shaped edge 1 having a constant width on the periphery.
a, and an air intake portion 5 is provided on the same edge portion 1a.

Further, the air intake portion 5 is provided with an air bubble amount adjustment valve Va and a motor gate 2 for driving a valve body for air bubble amount adjustment that drives the air bubble amount adjustment valve Va.

In addition, the bubble-generating bathtub A is provided with a pump protection case 9 on the outer periphery of the bathtub body 1, and inside the case 9 is a circulation pump P that circulates the bath water in the bathtub body 1. a filtration aR that filters the bath water circulated by the circulation pump P;
A pump drive device M that drives the pump P, and a motor M that drives the pump drive device M and a nozzle valve body forward and backward, which will be described later.
1. A control unit C is provided to control the driving of the valve body for adjusting the air bubble ffi and the electric three-way valve Q.

Note that Ql is a waste pipe for discarding part of the bath water during backwashing.

A bath water circulation flow path is interposed between the bathtub body 1 and the circulation pump P described above.

That is, the bath water circulation flow path includes a bath water suction pipe (bath water suction flow path) 10 for sending bath water from the bubble generating bathtub A to the circulation pump P, and a bath water suction pipe (bath water suction flow path) for sending bath water from the bubble generating bathtub A to the circulation pump P. It consists of a bathtub bullet conveying vibe (bathtub bullet conveying channel) 11 for sending hot water.

The bath water suction pipe 10 has one end opened at the bottom of the bathtub body 1 to form a suction port 22, and the other end communicates with the water supply port of the circulation pump P to suck bath water into the circulation pump P. That's what I do.

On the other hand, the bath water bullet feed pipe 11 has one end connected to the circulation pump P.
The other end is connected to the spout nozzle 2°3.4 on the foot side, ventral side, and dorsal side, respectively.

Furthermore, as shown in FIG. 3, a pressure detection sensor 12 is installed in the middle of the bath water pumping pipe 11 to detect the pressure of the bath water being pumped into the pipe 11. Then, a detection signal from the pressure detection sensor 12 is sent to a control section C, which will be described later, and the control section C controls the ejection pressure of the bath water ejected from each ejection nozzle 2, 3.4 of the pump drive device M. Control is performed by changing the rotational speed and the position of the valve body for adjusting the amount of ejection from each of the leg side, dorsal side, and ventral side ejection nozzles 2, 3.4.

Further, the pressure detection sensor 12 can also be used as a water level sensor for detecting the amount of bath water in the bathtub body 1.

These jet nozzles 2, 3.4 each use a jet volume automatic adjustment jet nozzle having the same structure and configured to be able to automatically change the jet volume and jet pressure of bath water.

Furthermore, an intake pipe 5a from an air intake section 5 is connected to the jet nozzles 2, 3.4, as shown in the third circle.

Then, air is mixed into the bath water through the suction pipe 5a by utilizing the jet pressure generated by operating the circulation pump P, and the bath water mixed with air bubbles is ejected from the jet nozzles 2, 3.4. You can squirt more.

Next, the configuration of the control section C for controlling the pump drive section WM and the foot, dorsal, and ventral jet nozzles 2.3.4 will be described.

The control unit C is a microprocessor as shown in FIG.
IP [I and human output interface 13.14 and 1?
It consists of a memory 15 consisting of OM and IIAM, and a timer 16.

In the above configuration, the input interface 13
includes a detection sensor 6 for use in detecting an abnormality in the circulation pump P, a valve body reference position detection sensor 17 for detecting the opening/closing amount of the valve body for controlling the ejection amount, and a valve standard position detecting sensor 17 for detecting the opening/closing amount of the bubble ffi control valve. Receives infrared drive signals from the detection sensor 18, the pressure detection sensor 12 that detects the water pressure of the bath water delivery pipe 11, the bath water temperature detection sensor T that detects the temperature of the bath water in the bathtub body 1, and the remote controller 20. A light-receiving section 21 that also serves as an operation section is connected.

Note that in this embodiment, the light receiving section 21 is connected to the air intake section 5.
is placed above.

On the other hand, the output interface 14 is connected to a pump driving device M, a motor M1 for driving the nozzle valve body forward and backward, a motor M2 for driving the valve body for adjusting the amount of air bubbles, and an electric three-way valve Q.

The memory 15 also stores the pump drive unit fiM, the motor M1 for driving the valve body for the nozzle, the motor M1 for adjusting the amount of air bubbles, and the motor M1 for driving the nozzle valve forward and backward, based on the output signals from each of the sensors described above and the drive signal from the remote controller 20. Morph M2 for valve body drive
And a drive sequence program for driving the drive unit of the electric three-way valve Q is stored.

The above-mentioned bubble generating bath mA, except for the configuration of the pump driving device M described below, is based on Japanese Patent Application No. 63-331772.
It is possible to have a configuration similar to that disclosed in No.

The present invention provides a pump drive unit T that drives the circulation pump P in the bubble generating bathtub A configured as described above! , M is characterized by using an induction morph 40 that can change the rotation speed of the circulation pump P by changing the number of poles.

In this case, induction morph 40 uses a pole switching motor.

FIG. 4 shows a conceptual electric circuit configuration for switching the number of poles, in which a pole number switch 41 is interposed between the induction motor 40 and the liver U of the control device C.

Then, based on the control signal from the control bag WC, the number of poles (for example, 24, 12, 8.6
.

By changing 4.2), it is possible to easily change the rotational speed N of the circulation pump P and arbitrarily change the ejection amount and ejection pressure of the bath water, as shown in the equation shown below.

Therefore, bathers can use various types of blowjobs (for example,
You can enjoy the mild blow, acupressure blow, pine surge blow, etc. described in No. 3-331772.

120・f N = -(1-3) (Here, N: rotation speed of circulation pump P, f knee-order frequency, p: number of poles, S: slip) Also, since the number of poles p is changed, the inverter It is possible to change the blow form without performing any control, and the possibility of life-threatening electric shocks caused by high frequency components can be reduced as much as possible.

Furthermore, since an expensive inverter is not required, the bubble generating bathtub A can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the bubble-generating bathtub of the present invention, Part 2 is a plan view of the same bathtub, Fig. 3 is a block diagram of the piping system and control system of the bubble-generating bathtub, and Fig. 4 is the concept of the pole number switching circuit. FIG. (A): Bubble generating bathtub (D): Bath water circulation flow path (P): I-ring pump (M): Pump drive device

Claims (1)

[Claims] 1. A bath water circulation flow path consisting of a bath water suction flow path and a bath water forced flow path is interposed between the bathtub body and the circulation pump, and the bath water forced flow flow path is The air intake parts are connected in communication, and the air taken in by the air intake parts is mixed into the bath water in the bath water forced flow path, so that the bath water mixed with air bubbles can be spouted from each jet nozzle into the bathtub body. A bubble-generating bathtub characterized in that the pump drive device connected to the circulation pump is formed by an induction motor whose speed can be controlled by changing the number of poles.