JPH042266B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to means for generating jet-like bubbles in a bath.

(b) Prior Art Conventionally, devices for generating jet-like bubbles in a bathtub include a bathtub 1, a nozzle 3, a valve 4, an intake hole 5, a pump 6, a water pipe 7, a motor 8, etc. in FIG. The main parts are the shape of the nozzle 3, the degree of opening of the valve 4, the air intake amount of the intake hole 5, the type of pump 6, the effective cross-sectional area of the water pipe 7, and the motor 8.
From nozzle 3 to bath 1 depending on the correlation of the use of
The amount of bubbles spouted out and the discharge pressure are constant,
It operates continuously at a constant pressure.

However, in order to change the amount of bubbles and discharge pressure, it is necessary to
As disclosed in Publication No. 175360, by automatically controlling the electromagnetic valve interposed between the pump and the foamer, in combination with pump operation time control, ejection pressure and temporal changes can be obtained. There is something I did.

These technologies allow the pump to turn on the motor.
The operating time is varied by OFF control, and the solenoid valve is designed to vary the ejection pressure by controlling stepwise or continuously the amount of bath water flowing through the water pipe.

(c) Problems to be Solved by the Invention As described above, for example, a device that generates and blows out bubbles in a continuous operation at a constant amount and constant pressure has the following drawbacks.

In other words, the air bubbles with strong discharge pressure are continuously
Some users have found that if the device is applied to the shoulders, they may feel uncomfortable when taking deep breaths and stretching and contracting their muscles, and may even find it difficult to breathe. This is where you will be exposed.

In addition, the only way to make the discharge pressure stronger than necessary, in other words, to weaken it in the case of excessive equipment, is to adjust it with the valve 4, which is also wasteful in terms of power saving. On the other hand, if the equipment is weaker than planned, there is no way to make it stronger from an economic standpoint, and the reality is that the equipment remains idle.

Furthermore, even if the equipment is appropriately strong as expected, pressure loss will gradually increase due to water scale, dirt, etc. that accumulates in the nozzle 3 and water pipe 7 over time, making it difficult to obtain an appropriate discharge pressure. It disappears.

In order to solve these drawbacks, a method in which the jet flow form is changed by combining pump operation time control and electromagnetic valve flow control has the following drawbacks.

That is, since the flow rate is controlled by an electromagnetic valve, it is easily affected by the hysteresis of the valve.

Therefore, even if you operate the valve at a constant opening to always obtain a constant flow rate, you cannot actually obtain a water flow with a constant flow rate and flow pressure, and therefore bubbles are generated in the foamer. However, in the bathtub, the desired bubble jet pressure is not achieved, and the change in the bubble jet felt by the body is different from the initial change, so there is no reproducibility of the change in the bubble jet each time.

Furthermore, since the flow rate is controlled by a valve, the flow rate and flow pressure of the water flow are inversely proportional. For example, if the flow rate is reduced, the flow pressure will increase, and the control of the water flow to the foamer will depend on the flow rate. Bubble jet flow is performed in a state that is inversely proportional to the flow pressure.

Therefore, for example, if you want to control the bubble jet to alternate between a strong jet state and a weak jet state, even if you alternately change the size of the valve restriction, the flow rate will decrease when the flow pressure is high. The amount of bubbles taken in decreases as the flow rate decreases, and conversely, when operating a valve with low flow pressure and high flow rate, the amount of bubbles taken in decreases as the flow pressure decreases.
In the end, it is not possible to reliably control the amount of bubbles taken in only by operating the valve, and the only changes that can be felt by the body are changes caused by the flow pressure of the water flow.

Therefore, it has been impossible to control the bubble jet with high accuracy and reproducibility, such as controlling the amount of bubbles in the bubble jet by simultaneously changing the size of both the water flow and the water pressure.

The present invention alleviates the above-mentioned drawbacks by simple means, and enables equipment operators to save power and make effective use of new and old equipment.
The purpose is to provide comfort to users.

(d) Means for Solving the Problems This invention connects an inverter to a device that generates jet-like bubbles in a bathtub, and uses a frequency setting device, an orbit/stop time setting device, and a holding time setting device to control the motor. It is an object of the present invention to provide a cyclical operation device for increasing and decreasing foaming pressure for a bath, which is a combination of cyclic operation of light load and heavy load at any period within the range of the capacity of the above.

(e) Effect The operation control of the foaming pressure strength/weakness periodic operation device for the desired area in the present invention is carried out by controlling the output frequency and the frequency at which the motor performs periodic operation of light load and heavy load within a range where the motor does not exceed the rated temperature rise during 100% continuous operation. The output time is set respectively, and the discharge amount and discharge pressure of bubbles are adjusted.

To explain this with reference to the drawings, the discharge force e and f are controlled by the frequency setter 12 and the start/stop time setter 1
3 sets the fluctuation time bd of the ejection forces e and f, and the holding time setter 14 sets the holding times a and c of the ejection forces e and f. According to the program based on these combinations, the input frequency supplied from the AC commercial power supply 15 is processed by the inverter 10,
A frequency conversion is performed. The rotation speed of the motor 8 is controlled in comparison with the output frequency generated by the inverter 10, and this is transmitted to the pump 6, which changes the discharge amount and discharge pressure of the bubbles 2 discharged from the nozzle 3 according to a program.

(f) Embodiments The embodiments of this invention will be described in detail based on the drawings.
As shown in Figure 1, an inverter is connected to a device that generates jet-like bubbles in the bathtub, and a frequency setting device, start/stop time setting device, and holding time setting device are used to set the frequency within the motor's capacity. This is a foaming pressure cyclical operation device for baths that can perform cyclical operation with a load and a heavy load at any desired period.

FIG. 2 shows, as an example, the relationship between the discharge force and time when the state of the bubbles 2 in the bathtub 1 is periodically changed using the foaming pressure cyclic operation device for baths of the present invention. .

Here, e indicates the ejection force under light load, and f indicates the ejection force under heavy load. The maximum allowable value of the output frequency that determines the maximum allowable value of the discharge force f is within a range that does not reduce the life of the equipment, that is, the temperature rise of the motor 8, the proof stress of mechanical parts such as bearings, and the mechanism such as bearings and blades of the pump 6. Determine by considering factors such as the proof stress of the part and the pressure strength of the water pipe. Figure 3 shows the second
The state of air bubble discharge in the bathtub 1 in each state of a1, b1, c1, and d1 in the figure and the effective bathing method at that time are illustrated as an example.

a1 indicates a state of relaxing the shoulders and resting. b1 indicates a state in which the number of bubbles ejected from the nozzle gradually increases, and as the bubbles become stronger, the user takes a deep breath.

c1 indicates a state where you hold your breath and apply strong bubbles to pressure points on your shoulder. d1 indicates the state of relaxing the shoulders while exhaling slowly.

The operation control of the foaming pressure strength/weakness central operating device for the melt field in the present invention is such that the output frequency/output time is such that the motor performs cyclic operation of light load and heavy load within a range that does not exceed the rated temperature rise during 100% continuous operation of the motor. are set respectively, and the discharge amount and discharge pressure of bubbles are adjusted.

To explain this with the drawings, the frequency setter 12 sets the ejection force e and f, the start/stop time setter 13 sets the fluctuation times b and d of the ejection force e and f, and the holding time setter 14 sets the ejection force. Set the holding times a and c of e and f. According to a program based on these combinations, the input frequency supplied from the AC commercial power source 15 is processed by the inverter 10, and frequency conversion is performed. This inverter 10
The rotational speed of the motor 8 is controlled in proportion to the output frequency generated by the pump 6, which is transmitted to the pump 6, which converts the discharge amount and discharge pressure of the bubbles 2 discharged from the nozzle 3 according to a program.

In such an embodiment, the load of the foaming pressure cyclic operation device for the melt field has a square-law reduction torque characteristic, so this method of converting the discharge amount and discharge pressure often leads to significant power savings. . The degree of power saving can be approximated by the following equation.

E=y [1-{(f ³ ₁ t ₁ + 2f ³ ₂ t ₂ + f ³ ₅ t ₃ ) / (t ₁ + 2t ₂ + t ₃ )}]×100 (%) Here, E: Compared to continuous operation Power saving rate (%) f ₁ : Maximum output frequency/power frequency f ₃ : Minimum output frequency/power frequency f ₃ : (f ₁ + f ₃ )/2 t ₁ : Duration of maximum output frequency t ₃ : Minimum output Frequency duration t ₂ : Adjustment time between maximum and minimum frequency y : Electrical efficiency In this way, for users it is a more comfortable method of use, and for the equipment operator it is a way to reduce wasted power. It is characterized by having an adjustable function.

(G) Effects of the Invention According to this, the person can easily take a deep breath in accordance with the periodic strength and weakness of the jet stream discharged from the nozzle 3, and at the same time, the muscles expand and contract, producing an effect similar to when massaging the shoulders. In addition, even in a conventional device that generates jet-like bubbles in a bathtub, which is installed weaker than expected, if the operation control of the present invention, which allows cyclic operation of light loads and overloads, is applied, it will be beneficial for bathers. This makes the system more comfortable to use.

Furthermore, from an economic standpoint, this method, which uses an inverter to vary the discharge amount and discharge pressure, often leads to significant power savings.

In this way, the system is characterized by having an adjustment function that allows the user to use the system more comfortably and for the installer to save unnecessary power.

Furthermore, since the amount of bubbles discharged and the discharge pressure are controlled by controlling the rotational speed of the motor, the amount and pressure of water discharged are controlled in direct proportion, and the amount and pressure of bubbles are also adjusted accordingly. This has the effect of accurately controlling changes in the shape of the bubble jet, and compared to control using a valve, there is no effect of hysteresis, and the amount of bubbles taken in can be accurately controlled.
It has the effect of reproducing the discharge pressure.

[Brief explanation of drawings]

FIG. 1 is a system diagram of the foaming pressure cyclical operation device for baths of the present invention, of which 3, 4, 5,
6, 7, and 8 are systematically the same as a conventional device for generating jet-like bubbles in a bathtub. Figure 2 shows
This is an example of the operation of the foaming pressure cyclic operation device for baths of the present invention, and is shown in terms of the relationship between discharge force and time. FIG. 3 shows an example of how a bather can use the system in each state shown in FIG. 1: Bathtub, 2: Bubbles, 3: Nozzle, 4: Valve, 5: Intake hole, 6: Pump, 7: Water pipe, 8: Motor, 9: AC reactor for noise reduction, 11: Zero-phase reactor for radio noise reduction .

Claims (1)

[Claims] 1 Device for generating jet-like bubbles in the bathtub 3,
Connect the inverter 10 to 4, 5, 6, 7, 8,
frequency setter 12, start/stop time setter 13,
and a foaming pressure strength/weakness periodic operation device for a bath, which has a combination in which cyclic operation of light load and heavy load can be performed at any period within the capacity of the motor 8 using the holding time setting device 14.