JPH06102074B2 - Pump emergency stop device for bubble bath - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble type bathtub equipped with a pump for sucking hot and cold water from the inside of the bathtub and returning the hot and cold water to the bathtub with bubbles through a nozzle opening in the bathtub. The present invention relates to a pump emergency stop device.

[0002]

2. Description of the Related Art Conventionally, as this type of apparatus, for example, a water level switch is provided in a steam / water separation tank, and the operation of the pump is controlled by a water level detection signal from this switch. This conventional product detects whether the water level in the bathtub is above or below the nozzle position with the above switch, and when the water level is above the nozzle position, the pump is ready to start, and the water level is above the nozzle position. If it is below, it operates to stop the operation of the pump.

[0003]

Therefore, originally, the above-mentioned conventional products prevent the pump from starting in a state where hot water is not poured in the bathtub, and the pump fails due to idle operation. Alternatively, it is provided in order to prevent hot water from spouting and scattering in the bathtub.

Therefore, in the conventional product, for example, when an infant or a physically handicapped person accidentally sucks hair or the like into the water inlet of the bathtub while taking a bath, another bather or an attendant can use the switch on the operation panel to switch the hair. Unless the pump was turned off, the pump operated without stopping the operation. As a result, in the case of the conventional bathtub of this kind, there is a possibility that an infant or the like may be inhaled by the water in his / her hair and drowned, and the unfortunate accident of this kind cannot be prevented.

The present invention is intended to solve the problems of such conventional products. Therefore, the technical problem of the present invention is to enable the operation of the pump to be stopped without using the switch of the operation panel in an emergency when the infant or the like cannot move because the hair is sucked into the water inlet of the bathtub. It is an object of the present invention to provide a pump emergency stop device for a bubble bath which is formed so as to prevent the occurrence of drowning accident.

[0006]

The present invention employs the following technical means in order to solve the above problems. That is, the apparatus of the present invention is a bubble type bathtub equipped with a pump 8 that sucks hot and cold water from the inside of the bathtub 1 and circulates the hot and cold water into the bathtub 1 together with bubbles through a nozzle 2 opened in the bathtub 1. A sensor 19 for detecting a value and this sensor 1
On the condition that the detected value from 9 satisfies the preset time T ₁ and the numerical value N and decreases and is equal to or less than the value N ₁ when the set time elapses after the fixed time T ₂ , And a control circuit section 20 that outputs an operation stop signal.

In this case, the sensor 19 is preferably constituted by a pressure sensor so as to detect the water pressure value of hot water. Further, the control circuit unit 20 is not limited to the case of being configured by the wired logic circuit, and may be formed by including a microcomputer. The data of the preset time T ₁ and the numerical value N is
The hair is drawn into the water inlet 3 and the water pressure drops sharply.
It is the value at the time of abnormal state and dangerous state.

As another means for achieving the above object, in a bubble bath equipped with the pump 8, a pressure sensor 22 for detecting a negative pressure of the pump 8 and a detection value from the pressure sensor 22 are steady. After the pressurization, the operation stop signal is sent to the pump 8 on condition that the preset time T ₁ and the numerical value N are increased and the value is equal to or more than the value N ₁ after the elapse of the set time even after the fixed time T _2. Some of them are characterized by including a control circuit section 20 for outputting.

As still another means, in a bubble bath equipped with the above-mentioned pump 8, a rotation sensor 23 for detecting the rotation speed of the pump 8 and a detection value from the rotation sensor 23 are preset after steady rotation. For a rotation sensor that outputs an operation stop signal to the pump 8 on condition that the time T ₁ and the rotation speed R are increased satisfactorily and that the rotation speed R ₁ is equal to or higher than a constant rotation speed T ₂ after a predetermined time T ₂ . And a control circuit section 24.

[0010]

First, the sensor 19 detects a change value of hot and cold water, and the detected value is sent to the control circuit section 20. Next, in this control circuit unit 20, the detected value decreases, for example, by satisfying a preset time T ₁ and a numerical value N, and a fixed time T ₂
After that, it is determined whether the value is equal to or less than the value N ₁ when the set time has elapsed. When both conditions are satisfied, an operation stop signal is output from the control circuit unit 20 to the pump 8 and the pump 8 is stopped.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 is a bathtub, 2 is a nozzle that opens inside the bathtub, and 3 is a water inlet that opens inside the bathtub 1. As shown in FIG. 9, the portion of the water suction port 3 that faces the bath 1 is covered with a lid-shaped suction fitting 4 in this embodiment, as shown in FIG.

The peripheral edge of the suction fitting 4 is closely attached to the inner surface of the bathtub 1 via a packing 5. 4a is a hot water flow hole. The flow holes 4a are formed in a small hole shape having a diameter of 3 (mm), for example, and a large number of openings are formed on the entire surface including the peripheral surface of the suction fitting 4. Therefore, in the case of this embodiment, with this suction fitting 4,
Even if the hair is sucked into the water inlet 3, it is possible to prevent the hair from penetrating to the position of the filter 6 and from being caught between the suction fitting 4 and the inner surface of the bathtub 1. In addition, 7 is a hair catcher metal fitting.

A pump 8 sucks hot and cold water from the bath 1 and circulates the hot and cold water into the bath with bubbles through the nozzle 2. In addition, 9 is a steam separation tank connected to the pipe 8a on the discharge side of the pump 8, 10 is a three-way valve, 11
Is a filter, 12 is a pressure switch, and 13 is an opening / closing valve attached to the pump 8. Further, 14 is a hopper, 15 is a silencer, 16 is an air solenoid valve, 17 is a transmission remote controller provided on the wall surface in the bathroom, and 18 is a reception remote controller 18a.
The whole of the bathtub bubble generator provided with is shown.

Reference numeral 19 is a sensor provided in the steam separation tank 9 for detecting the change value of the hot water. This sensor 19 is formed of a semiconductor type pressure sensor in this embodiment, and is configured to detect the water pressure value of hot water.

Further, the reference numeral 20 indicates that the detection value from the sensor 19 decreases while satisfying the preset time T ₁ (see FIG. 4) and the numerical value N, and the set time has elapsed even after the fixed time T ₂ . The control circuit unit outputs an operation stop signal to the pump 8 on condition that the value is not more than N ₁ . 2 is a flow chart of the device of the present invention, and FIG. 3 is an example of a circuit configuration for realizing this control procedure.

In FIG. 3, reference numeral 20a is an A / D converter for converting the detection value from the sensor 19 into a digital amount. Two
Reference numeral 0b is a data setter for presetting the data of the time T ₁ and the numerical value N when the water pressure decrease state is abnormal. Further, 20c is the data of the data setter 20b,
Reference numeral 20d is a comparator for comparing the current water pressure value converted into a digital value by the A / D converter 20a.
The output signal from 0c is received for a predetermined time T ₂ (for example, 5
It is a delay circuit that outputs a signal after (seconds).

Reference numeral 20e is a data setting device for presetting a value N ₁ when the set time has elapsed. A comparator 20f compares the water pressure value N ₁ set in the data setter 20e with the current water pressure value, and outputs a signal when the current water pressure value is equal to or less than the set water pressure value N ₁ . Is. 20g
Is an AN that outputs an H active signal when the AND logic of the output signals of the comparator 20f and the delay circuit 20d is established.
It is a D circuit. The output terminal of the AND circuit 20g is connected to the input terminal of the drive circuit 21 of the pump 8.

Next, the operation of this embodiment will be described. First, the water pressure value of hot water is detected by the sensor 19, and the detected value is A /
The digital amount is converted by the D converter 20a, and the comparator 20c
Sent to. Then, in the comparator 20c, the sent value is compared with the data preset in the data setter 20b, and if the set condition is satisfied, the comparator 20c
From the delay circuit 20d.

In this case, the data of the set time T ₁ and the water pressure value N set in the data setter 20b are the values in the abnormal state and the dangerous state in which the hair is drawn into the water inlet 3 and the water pressure sharply drops. Is. The water pressure value N is selected to be larger than the water pressure drop value (see FIG. 4) that is observed when hot water is discharged.

Next, the signal from the comparator 20c is received, and the delay circuit 20d receives a constant time T ₂ (5 seconds in this embodiment).
After a lapse of time, an H active signal is sent to the AND circuit 20g. The current pressure value, or less than pressure value N ₁ when the setting time has elapsed, is compared by the comparator 20f, the AND circuit from the comparator 20f when the current pressure value is less than or equal to the water pressure value N ₁ An H active signal is sent to 20g. When the AND logic of this signal and the H active signal from the delay circuit 20d is established, the AND circuit 20g sends a stop signal for the pump 8 to the drive circuit 21, thereby stopping the operation of the pump 8.

As described above, according to the present invention, even when the current water pressure value has passed the predetermined time T ₂ , the water pressure value N ₁ after the set time has elapsed.
When the following is true, the AND logic is established, and the control circuit unit 20
Outputs a stop signal for the pump 8. Therefore, in FIGS. 4A and 4B, the lines A and B indicate that the dangerous state has been avoided, so that no signal is output from the control circuit unit 20 and, as a result, the pump 8 does not stop operating. However, in the present invention, it is not necessary that the state of the water pressure value N ₁ continues for a certain period of time T ₂ , and therefore C in FIG.
When indicated by a line, the pump 8 is stopped.

In the above process, in the case of the present invention, the location of the sensor 19 is arbitrary, and for example, it may be provided in the discharge side pipe line 8a of the pump 8 or the suction side pipe line 8b. good. Further, in the case of the present invention, the sensor 19 is not limited to the case where the water pressure is detected by the pressure sensor, but may be composed of a sensor for detecting the amount of hot water or the speed of the water flow. Also, it goes without saying that the control circuit section 20 may be formed by including a microcomputer.

Further, the device of the present invention does not replace the conventional pump control device having a water level switch. For example, when the sensor 19 is provided on the discharge side or suction side pipe line 8a or 8b of the pump as described above. Is preferably co-located with a conventional device. When the sensor 19 is provided in the steam / water separation tank 9 as in the above example, the output from the sensor 19 may constitute a conventional pump protection circuit.

In the present invention, a solenoid valve is provided in the drain pipe of the bathtub 1, the solenoid valve and the output terminal of the control circuit section 20 are connected, and the solenoid valve is opened when the pump 8 is stopped, so that the bathtub 1
You may comprise so that the hot water in it may be drained.

Further, according to the present invention, as shown in FIG. 5, the pressure sensor 2 for detecting a negative pressure is provided in the suction side pipe line 8b of the pump 8.
2 may be provided, and a signal for turning off the pump 8 may be output from the control circuit unit 20 in response to the detection value from the pressure sensor 22.

In this case, since the negative pressure increases with the passage of time as shown in FIG. 6, the control circuit unit 20 causes the detection value from the pressure sensor 22 to reach a preset time T after the steady pressure.
₁ and the numerical value N satisfying an increase, and the value N ₁ at the time when the set time has elapsed after the elapse of a certain time T ₂
The pump 8 is formed so as to output an operation stop signal. The control circuit unit 20 is different from the case of the device of the present invention in FIG. 1 only in the setting conditions, and the circuit configuration may be formed in the same manner.

In FIG. 6, the line A shows the case where the hair is once sucked into the water inlet 3 and the hair can be separated after that, the line B shows the case where the water inlet 3 is closed with a hand or a towel and then separated. Indicates a case where the filter 6 of the water inlet 3 is clogged with dust and the negative pressure gradually rises. In any of these cases A to C, the pump 8 does not stop because the above set conditions are not satisfied.

As another means of the present invention, there is one configured as shown in FIG. In the figure, reference numeral 23 is a rotation sensor for detecting the number of rotations of the pump 8. Again 24
Indicates that the detected value from the rotation sensor 23 increases while satisfying the preset time T ₁ (see FIG. 8) and the rotation speed R after the steady rotation, and the constant rotation speed R ₁ after the fixed time T _2. The control circuit unit for the rotation sensor that outputs an operation stop signal to the pump 8 on condition that the above is the case.

Reference numeral 24a is a data setter for setting the rotation speed during steady operation, and 24b is this setting rotation speed and A / D converter 2.
4c is a comparator for comparing the detected value converted into a digital value in 4c. Further, 24d is a data setting device for setting the time T ₁ and the value of the rotational speed R when the degree of increase in the rotational speed is abnormal, and 24e compares this data with the current rotational state and satisfies the condition. It is a comparator that outputs a signal when.

Reference numeral 24f is an AND circuit which takes an AND logic of the output signals of the comparators 24b and 24e, and 24g is a delay circuit which receives the output signal of the AND circuit 24f and outputs the signal after a predetermined time T ₂ .

Further, 24h is a data setter for setting a constant rotation speed R ₁ , and 24i compares this rotation speed R ₁ with the current rotation speed, and the current rotation speed is equal to or higher than the constant rotation speed R _1. Is a comparator that outputs a signal when Further 24j
When an AND logic of the output signal of the comparator 24i and the output signal of the delay circuit 24g is established, the H active signal is output to A
It is an ND circuit. In addition, 8c is a rotating shaft of the pump 8.

Next, the operation of this device will be described. First, the rotation speed of the pump 8 detected by the rotation sensor 23 is converted into a digital amount by the A / D converter 24c. And comparator 2
4b, the current rotation speed is the rotation speed during steady operation (50Hz
Is about 2800 RPM [140 liters / minute]), and in the case of the rotational speed during steady operation, a signal is output from this comparator 24b.

In addition, the current rotation state of the comparator 24e is set in advance in the data setting device 24d under a dangerous condition (for example, 2).
It is compared whether or not the condition (increase of 10 revolutions per second) is satisfied, and if the set condition is satisfied, an output is output from the comparator 24e. Then, when the AND logic of the output signals of the comparators 24b and 24e is established, a signal is output from the AND circuit 24f to the delay circuit 24g, and the signal is output from the delay circuit 24g after a predetermined time T ₂ (for example, 5 seconds) after receiving this signal. Get out.

Further, in the comparator 24i, it is compared whether or not the current rotational speed is a constant rotational speed R ₁ (eg 2810 RPM) or more. If the current rotational speed is a constant rotational speed R ₁ or more, a signal is output from the comparator 24i. Is output. When the AND logic of this output signal and the output signal of the delay circuit 24g is established, a signal is sent from the AND circuit 24j to the drive circuit 21 of the pump 8 and the operation of the pump 8 is stopped.

In FIG. 8, when the change in the number of revolutions is shown by the lines A and B, it means that the suction state of the hair is released, and the pump 8 is not stopped. However, in the case of the C line, the constant rotation speed R ₁ is maintained even after the constant time T _2.
From the above, the stop signal is sent from the control circuit unit 24 to the pump 8, and the operation of the pump 8 is stopped.

[0036]

As described above, according to the present invention, in the bubble bath, the sensor for detecting the change value of the hot water and the control circuit section for receiving the detection value from the sensor and outputting the operation stop signal to the pump. Is formed. Thus, in this case, the device of the present invention does not simply stop the pump after a certain time after the water inlet is sealed, but as described above, the hot and cold water that rapidly decreases in a short time due to the phenomenon of sucking hair. The amount of displacement of the pump is detected, and the pump is stopped under the condition that it does not return to the normal water pressure value within a fixed time. Therefore, in the present invention, it is possible to stop the operation of the pump by accurately grasping an emergency situation where an infant or the like is sucked into the water intake port and cannot move, for example, so that the drowning accident of the infant or the like can be prevented. It has an excellent effect.

According to the second aspect of the present invention, since the pressure sensor for detecting the negative pressure is provided on the suction side of the pump, the above-mentioned effects can be obtained by using the device of the present invention. Moreover, there is an advantage that the dangerous value and the abnormal value can be detected earlier, and accordingly, the dangerous state can be avoided earlier.

Further, in the third aspect of the present invention, since the sensor is formed so as to detect the rotational speed of the pump, in the case of the present invention, the entire apparatus can be attached to the pump to be controlled. Therefore, according to this, not only the occurrence of drowning accident can be prevented, but also, for example, the wiring can be shortened and the device can be attached to the pump, so that there is an advantage that the space can be saved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a preferred example of the present invention.

FIG. 2 is a flowchart of the present invention.

FIG. 3 is a block diagram showing a configuration of a control circuit unit.

FIG. 4 is a graph illustrating the relationship between water pressure and time.

FIG. 5 is a configuration diagram showing another means of the present invention.

FIG. 6 is a graph illustrating the relationship between negative pressure and time.

FIG. 7 is a configuration diagram showing still another means of the present invention.

FIG. 8 is a graph illustrating the relationship between the rotation speed and time.

FIG. 9 shows a suction fitting, where A is a vertical sectional view at the time of mounting,
B is a front view.

[Explanation of symbols]

1 Bathtub 2 Nozzle 8 Pump 19 Sensor 20 Control Circuit Unit 22 Pressure Sensor 23 Rotation Sensor 24 Control Circuit Unit for Rotation Sensor T ₁ Hours T ₂ Constant Time N Numerical Value N ₁ Value after Set Time R Rotation Speed R ₁ Constant Number of rotations

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiko Tokage 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Stock company Noritsu (72) Inventor Koichi Kurosaki 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Stock society Company Noritsu

Claims (3)

[Claims] 1. A bubble type bathtub equipped with a pump that sucks hot and cold water from the inside of the bathtub and circulates the hot and cold water into the bathtub together with bubbles through a nozzle opened in the bathtub, and a sensor for detecting the change value of the hot and cold water. , The operation stop signal is output to the pump on condition that the detection value from this sensor is reduced by satisfying the preset time and the numerical value and is equal to or less than the value when the set time elapses after a certain time. A pump emergency stop device for a bubble bath, comprising a control circuit section. 2. A bubble-type bathtub equipped with a pump for sucking hot water from the bath and returning the hot water to the bath together with bubbles through a nozzle opened in the bath. A pressure sensor for detecting a negative pressure of the pump. The pump operates on the condition that the detected value from this pressure sensor increases after the steady pressure by satisfying the preset time and numerical value, and is equal to or more than the value when the set time elapses after a certain time. A pump emergency stop device for a bubble bath, comprising a control circuit section for outputting a stop signal. 3. A rotation sensor for detecting the number of revolutions of the pump in a bubble type bathtub, which is equipped with a pump that sucks hot and cold water from the inside of the bathtub and circulates the hot and cold water into the bathtub with bubbles through a nozzle opened in the bathtub. And, if the detected value from the rotation sensor is increased after satisfying the preset time and rotation speed after steady rotation, and the rotation speed is equal to or higher than a fixed rotation speed after a fixed time, the pump is stopped. A pump emergency stop device for a bubble bath, comprising a control circuit unit for a rotation sensor that outputs a signal.