JPH0520733U - Bubble bath equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent backflow of bath water into the air supply pipe. [Structure] An air pump 10 and a bubble jet nozzle provided at the bottom of a bath 14 are connected by an air pipe 12. The air pump 10 includes a DC brushless motor 10b and a fan 10a rotated by the DC brushless motor 10b. [Effect] A high responsiveness is obtained when the air volume adjustment switch is adjusted, and the air volume is adjusted quickly. Rotational speeds above the synchronous speed of the power supply frequency are also possible, and the pressure and air flow characteristics of the fan are drastically increased by the proportional law of pressure proportional to the square of the rotational speed and the proportional law of air volume almost proportional to the rotational speed. Increase. Since noise is centered on high frequencies, noise can be easily dealt with. There is no pulsation and the buffer tank becomes unnecessary.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bubble bath device, and more particularly to a bubble bath device configured to supply air to a bubble jet nozzle by a pump.

[0002]

[Prior Art]

 FIG. 4 is a conceptual diagram of this type of bubble bath. Air from the air pump 10 is supplied to the bubble jet nozzle 16 at the bottom of the bath 14 through the air pipe 12. Reference numeral 18 is a drainage port of the bathtub 14, and 20 is a drainage pipe.

In such a bubble bath, in order to prevent the backflow of bath water to the air pump 10, a check valve 22 and a reverse U-shaped pipe 24 are provided in the air supply pipe 12 near the pump discharge port. It should be noted that by controlling the number of revolutions of the pump 10, the ejection amount of bubbles can be adjusted.

In this bubble bath apparatus, the air pipe 12 is relatively long. Further, the nozzle 18 needs to have a small fumarole because of the installation space and the appearance (design). For this reason, the pressure loss of the air blowing system becomes large. Therefore, the blower needs to have a large discharge pressure relative to the air volume. The measured values are P≈0.2 kgf / cm ² and Q≈200 l / min.

Therefore, conventionally, the following blowers have been mainly used.

Rotating fan using a capacitor motor that uses a single-phase tributary power source Displacement pump that uses a solenoid that uses a single-phase tributary power source (mainly a diaphragm pump)

[0007]

However, the above air pump has the following problems.

However, since the starting torque of the drive motor is small, the transient characteristics such as starting and stopping are poor. For this reason, there is a large time lag from the start of operation to the start of air bubbles. In addition, the number of revolutions cannot be increased beyond the frequency of the power supply and the synchronous speed, so the fan must be enlarged in order to obtain the air volume and pressure at the point of use. Furthermore, it is difficult to control the amount of bubbles because the rotational speed cannot be controlled to a large extent.

However, since the solenoid operates (vibrates) at the frequency of the power supply, pulsation occurs in the exhaust gas (blowing), and it is necessary to provide a buffer tank or the like in the blowing path to attenuate the pulsation. In addition, since it itself becomes a vibration source (especially low frequency), it is necessary to take measures (for example, strengthening the strength of the solenoid casing and insulating it from the sounding body (arrangement of anti-vibration rubber etc.)). Become.

It is not suitable for a so-called built-in bathroom type in which a pump is installed in a bathroom. It is also difficult to control the air volume.

Since the power factor is bad, the power consumption is large.

[0012]

[Means for Solving the Problems]

 The bubble bath device of the present invention comprises a bath provided with a bubble jet nozzle for jetting bubbles into the bath, an air pump having a DC brushless motor for blowing air to the nozzle, and a rotation speed of the motor. And a drive circuit for controlling the.

[0013]

[Action]

 The present invention is intended to improve fan response, improve bubble ejection characteristics (pulsation, etc.), save energy, and reduce size by using a DC brushless motor as a fan driving motor.

[0014]

【Example】

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the entire structure of a bath with a bubble jetting nozzle according to an embodiment of the present invention.

In the present embodiment, the air pump 10 comprises a fan 10a and a DC brushless motor 10b for rotating the fan 10. The air pump 10 is driven by the controller 24 based on a selection signal from the remote control switch 22 in the bath room. The remote control switch 22 is provided with an on / off switch 26, and switches 28, 30, 32 for selecting the bubble ejection amount.

Other configurations are the same as those in FIG. 2, and the same reference numerals are given to the same portions and the description thereof will be omitted.

In the bubble bath apparatus of this embodiment, the DC brushless motor 10b drives the fan 10a.

[0019]

[Effect of the device]

 In the bubble bath apparatus of the present invention, since the one having the DC brushless motor is adopted as the air pump for feeding the air to the bubble jet nozzle, the following effects can be obtained.

The air volume adjustment switch provides high responsiveness when adjusted, and the air volume is adjusted quickly.

A rotation speed equal to or higher than the synchronous speed of the power supply frequency is also possible, and the pressure and air flow characteristics of the fan are determined by the proportional law of pressure that is approximately proportional to the square of the rotation speed and the proportional law of air flow that is approximately proportional to the rotation speed. Is greatly increased.

Since noise is mainly at high frequencies, it can be easily dealt with by a sound absorbing material or the like.

Since there is no pulsation, the buffer tank becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a bubble bath device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional bubble bath device.

[Explanation of symbols]

 10 Air Pump 10a Fan 10b DC Brushless Motor 12 Air Supply Pipe 14 Bathtub 16 Bubble Jet Nozzle 22 Remote Control Switch in Bathroom 24 Control Section

Claims (1)

[Scope of utility model registration request] 1. A bathtub provided with a bubble jet nozzle for jetting bubbles into the bathtub, an air pump having a DC brushless motor for blowing air to the nozzle, and a drive for controlling the rotation speed of the motor. A bubble bath device comprising: a circuit.