JPH07180201A - Heat injury preventing device of sanitary washer - Google Patents

Abstract

PURPOSE:To provide a heat injury preventing device which is so constructed that when the temperature of hot water becomes above a specified temperature, a hot water sensing device stops water supply to a washing nozzle to surely prevent heat injury and is communicated to a by-pass port at that time to discharge high temperature water, and when a flow sensing device detects an increase in its flow and the detected flow becomes above a preset flow, the device is interlocked with a control part to light an abnormality indicating part in a console part. CONSTITUTION:A heat injury preventing device comprises a hot water sensing device 10 for sensing a specified temperature of hot water and stopping water supply and a washing nozzle 5 for hot water through the hot water sensing device 10. The hot water sensing device 10 is so constructed that a movable valve is inserted in such a manner as to freely move, the movable valve is energized from back and front by a shape memory apply member for sensing the specified temperature of the hot water and a bias spring, and a by-pass port 11c is provided for forcing supplied water to by-pass when the shape memory alloy member senses the specified temperature of the hot water, and the device 10 is communicated to the by-pass port 11c to discharge high temperature water. A flow sensing device 16 for sensing the flow is disposed in a drainage path 17, and a console part is provided with an abnormality indicating part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a burn preventive device for a sanitary washing device.

[0002]

2. Description of the Related Art A conventional burn preventing device for a sanitary washing device is shown in FIG.

In the figure, the water in the hot water tank 1 has a normal hot water temperature of 30 ° C. to 45 ° C. due to the positive temperature coefficient thermistor 7.
Has been maintained to a degree. When the cleaning operation unit (not shown) is operated after the toilet in such a state, the water supply member 6 operates and hot water is ejected from the cleaning nozzle 5 toward the local area. Further, the thermostat 8 arranged in the hot water tank 1 stops the electric current to the heater 4 when the hot water temperature is 45 ° C. or more and is 60 ° C. as an example, and at the same time, supplies the hot water to the cleaning nozzle 5 (control unit). (Omitted) to stop the current to. As described above, the thermostat 8 is provided as a burn preventing means so as not to eject hot water. There is also an example in which a thermal fuse 9 is attached to the hot water tank 1 to prevent empty heating (Japanese Patent Publication No. 3-43539).

[0004]

In the burn preventive device of the sanitary washing device, when the positive temperature coefficient thermistor 7 for controlling the hot water temperature fails, the temperature becomes higher than the actual operating temperature (30 to 45 ° C) and the thermostat 8 operates. Since there is no means for preventing burns up to 60 ° C., there is a problem that hot water (50 to 65 ° C.), which may cause burns, is occasionally ejected.

An object of the present invention is to prevent a burn by performing a reliable operation at a low cost with a rational structure and to inform the user that the burn preventive device has operated.

[0006]

In order to solve the problems, the present invention detects a hot water tank to which water is supplied, a heater for heating water in the hot water tank, and a specific temperature of hot water sent from the hot water tank. In the burn preventive device of the sanitary washing device, which has a hot water sensing device that stops the water supply to the washing nozzle and a washing nozzle that ejects hot water through the hot water sensing device, the hot water sensing device has a movable valve movably inserted. Then, the movable valve is biased from the front and back by a shape memory alloy member that detects a specific temperature of hot water and a bias spring, and a bypass port is provided to bypass water supply when the shape memory alloy member detects a specific temperature of hot water. The hot water sensor communicates with the mouth, and the hot water sensor sends a valve movement signal or detects a bypass flow rate when the hot water is detected. Closed to one in which enhanced safety, also provided an abnormality display on the operation unit. Further, the hot water sensing device is provided with respective guides for holding the shape memory alloy member and the bias spring, respectively.

[0007]

In the burn preventing device of the sanitary washing device,
In the hot water sensing device, the shape memory alloy member is largely displaced due to the temperature change of the hot water, and when the temperature exceeds a specific temperature, the water supply to the cleaning nozzle is stopped and the burn injury is surely prevented. At that time, when the hot water sensing device detects a high temperature, it sends a valve body movement signal to the control unit to close the water feeding member. Alternatively, after the hot water is drained from the bypass port, the flow rate detection device detects the increase in the flow rate, and when it exceeds the preset flow rate, the water supply member is closed in conjunction with the control unit and the abnormality display section in the operation section lights up. It has the effect of causing it.

Further, in the hot water sensor, since the movable valve is provided with the shape memory alloy member and the bias spring, and the guide for holding the shape memory alloy member and the bias spring is provided, the movable valve can be securely operated without spring buckling. Operate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.

In the figure, reference numeral 1 is a hot water tank to which water is supplied, and a water supply pipe 2 is provided at one end thereof and a water supply pipe 3 is provided at the other end thereof, and a heater 4 for heating water is put therein. There is. Reference numeral 5 is a cleaning nozzle for ejecting warm water, which is installed in a sanitary cleaning device (not shown), and its water inlet 5a has a water supply pipe 3
The nozzle portion 5b on the outlet side is communicated with the warm water sensing device 10 described later via the. Reference numeral 6 denotes a water supply member, which is an electromagnetic pump for supplying hot water to the cleaning nozzle 5, for example. Reference numeral 7 denotes a positive temperature coefficient thermistor for always setting the hot water temperature, which maintains the hot water temperature at about 30 ° C to 45 ° C.
Reference numeral 8 denotes a thermostat, which stops the current to the heater 4 when the temperature of the hot water is 45 ° C. or more and is 60 ° C. as an example, and simultaneously stops the current to the water supply member 6 for supplying the hot water to the cleaning nozzle 5.

The operating temperature is less likely to cause burns as the hot water temperature is closer to 45 ° C. However, since the thermostat, which is a protective device, malfunctions during normal operation, a certain temperature difference is required. Is.

Reference numeral 9 is a thermal fuse for preventing empty heating. The positive temperature coefficient thermistor 7, the thermostat 8 and the temperature fuse 9 are arranged at appropriate positions in the hot water tank 1.

Numeral 10 is an open / close valve which is mounted on the water supply pipe 3 of the hot water sensing device of the present invention and senses a specific temperature of hot water to open / close. Reference numeral 11 denotes a valve body of the hot water sensing device 10, in which a water passage 12 that connects the water inlet 11a, the water feeder 11b, and the bypass port 11c is formed. Numeral 13 is a movable valve that opens and closes the water channel 12 and is movably inserted into the water channel 12, and is configured to open the bypass port 11c when moving to the water feeding portion 11b side and open the water feeding portion 11b when moving to the water feeding portion 11a side. A guide 11d is provided in the portion 11a, and the water supply portion 1
A guide 11e is provided on the 1b side.

Reference numeral 14 is a bias spring, which is a water supply section 1 of the water channel 12.
The movable valve 13 is inserted into the 1b side and held by a guide 11e whose inner diameter is adjusted to urge the movable valve 13 toward the water inlet section 11a.

Numeral 15 is a shape memory alloy member which is inserted into the water inlet 11a side of the water channel 12 and is held by a guide 11d which matches the inner diameter thereof. Normally, the movable valve 13 is urged to open the water inlet 11b side. It is a coil spring that is largely displaced when reaching a specific temperature. For example, when it exceeds a specific (transformation) temperature such as 50 ° C, it undergoes martensitic transformation and is greatly deformed into a specific shape (extended shape). It is reversibly deformed to its original specific shape (contracted shape) below a certain temperature, and its composition consists of an alloy such as nickel and titanium. It can be changed by changing its composition or adding other elements. The transformation temperature can be set arbitrarily.

Reference numeral 16 denotes, for example, a shaft impeller type flow rate detecting device which detects the rotation of the impeller by a magnetic sensor according to the instantaneous flow rate and outputs a pulse, and the flow rate measuring range is 0.3 to 5 liters / mi.
It is about n and is linked to a control unit (not shown). Further, it is installed via a drainage channel 17 communicating with the bypass port 11c of the hot water sensing device 10.

Reference numeral 18 denotes an operation section, which has an abnormality display section 18a having an abnormality display function when a high temperature is detected.

The operation of the burn preventing device of the sanitary washing device having the above-mentioned structure will be described below.

The water in the hot water tank 1 is heated by the heater 4, and the temperature thereof is 30 ° C. to 4 ° C. by the positive temperature coefficient thermistor 7.
It is maintained at around 5 ° C. When the washing operation unit 18 is operated after the toilet in such a state, the water supply member 6 operates and the hot water in the hot water tank 1 flows from the water supply pipe 3 to the hot water from the cleaning nozzle 5 via the water supply member 6 and the hot water sensing device 10. Erupts toward the local area.

However, when the temperature of the hot water flowing into the hot water sensing device 10 exceeds 50 ° C., the shape memory alloy member 15 is deformed into a specific elongated shape, and the bias that biases the movable valve 13 toward the water inlet 11a side. The movable valve 13 is moved to the water supply portion 11b side by overcoming the spring force of the spring 14, and the movable valve 1
3 closes the water supply part 11b leading to the cleaning nozzle 5 and stops the water supply to the cleaning nozzle 5, and at the same time, the bypass port 11c.
Since the high temperature water flows into the flow rate detecting device 16 when it is opened, and the increase in the flow rate is detected and the flow rate exceeds a preset flow rate, the water supply member 6 is closed in cooperation with a control unit (not shown),
Further, the abnormality display section 18a in the operation section 18 is turned on.
(FIG. 2 (b)), (FIG. 3), and similarly, when the temperature of the hot water falls below 40 ° C., for example, the shape memory alloy member 1
Since 5 is deformed to the original specific shape (contracted shape), the bias spring 14 moves the movable valve 13 to the water inlet 11a side, closes the bypass port 11c, and closes the bypass 12 and the water transmitter 11b to obtain an appropriate temperature from the cleaning nozzle 5. Hot water spouts (Fig. 2
(A)).

Further, as in the conventional case, when the temperature of hot water in the hot water tank 1 becomes 60 ° C. or higher, the thermostat 8 causes the heater 4 to move.
The current to the water supply member 6 for supplying hot water to the cleaning nozzle 5 is stopped at the same time as the current to the cleaning nozzle 5 is stopped.

Therefore, in addition to the burn prevention of the thermostat 8, the hot water sensing device 10 senses the specific temperature of the hot water and stops the water feeding to the water feeding nozzle 5, so that the burn can be surely prevented. Further, at this time, the high temperature water is drained from the bypass port 11c, and when the flow rate detecting device 16 detects an increase in the flow rate and the flow rate exceeds a preset flow rate, a control unit (not shown)
Since the water supply member 6 is de-energized and the water flow is closed, the safety is enhanced. At the same time, the abnormality display section 18a in the operation section 18 is turned on. Further, the high temperature water is drained from the drainage channel 17 into the toilet. The water supply member 6 that has been closed due to the high temperature detection can be electrically locked as it is and can be returned by a return button (not shown) or by turning the power on again.

In the hot water sensing device 10, the shape memory alloy member 15 and the bias spring 14 are inserted into the movable valve 13, and the guides 11d and 11e for holding the shape memory alloy member 15 and the bias spring 14 are provided. Therefore, there is no spring buckling and the movable valve operates reliably.

Next, as another embodiment, FIG. 4 shows an example in which the hot water sensing device 10 sends a valve body movement signal to the controller when it detects a high temperature. Reference numeral 13a is a magnet mounted on the movable valve 13, and 13b is a Hall IC that operates in opposition to the magnet 13a.

When the hot water temperature is low, the movable valve 13 is located at the left end and no signal is output from the Hall IC 13b. However, when the temperature rises, the shape memory alloy member 15 expands and the movable valve 13 moves to the right end.
A high temperature detection signal is output from the Hall IC 13b to the control unit in opposition to b and is accompanied by movement of the valve body. The control unit operates in conjunction with this signal and thereafter performs the same operation as described above.

Therefore, in the case of this embodiment, the above-mentioned flow rate sensing device 16 can be omitted.

[0027]

In the burn preventive device of the sanitary washing device of the present invention, the shape memory alloy member of the hot water sensing device is largely displaced by the temperature change of the hot water, and when the temperature exceeds a specific temperature, the water supply to the washing nozzle is stopped and the burn is caused. Make sure to prevent. At this time, high-temperature water is discharged from the bypass port, and a flow rate detecting device for detecting the flow rate is provided, so that the abnormality display section in the operation section is lit in conjunction with the control section. Further, in the hot water sensing device, since the shape memory alloy member and the bias spring are inserted into the movable valve and the guide for holding the shape memory alloy member and the bias spring is provided, the shape memory alloy member and the bias spring are movable without buckling. The valve works reliably.

Therefore, the burn preventing device is highly reliable and the hot water detecting device sends a high temperature detecting signal or detects the high temperature water discharged by the hot water detecting device to close the water supply member to enhance safety and operate the burn preventing device. The user can be notified of what has been done. As described above, the mechanical reliability of the shape memory alloy member and the safety and convenience of use of the high temperature detection output means can provide a burn preventing device for a sanitary washing device.

[Brief description of drawings]

FIG. 1 is a hot water supply system diagram of a burn preventing device of a sanitary washing device showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a hot water sensing device of a burn preventive device for a sanitary washing device according to an embodiment of the present invention ((a) normal time,
(B) During operation).

FIG. 3 is a schematic view of an apparatus including a burn prevention device of a sanitary washing device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a hot water sensing device of a burn preventing device of a sanitary washing device according to another embodiment of the present invention.

FIG. 5 is a hot water supply system diagram of a burn preventing device of a conventional sanitary washing device.

[Explanation of symbols]

 1 Hot Water Tank 4 Heater 5 Washing Nozzle 10 Hot Water Sensing Device 11c Bypass Port 11d Guide 11e Guide 13 Movable Valve 14 Bias Spring 15 Shape Memory Alloy Member 16 Flow Rate Sensing Device 18 Operation Portion 18a Abnormality Display Portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahide Suzuki 100, Maeda Town, Totsuka Ward, Yokohama City, Kanagawa Prefecture Koito Industry Co., Ltd.

Claims (5)

[Claims] 1. A hot water tank (1) to which water is supplied, a heater (4) for heating the water in the hot water tank (1), and a specific temperature of hot water sent from the hot water tank (1) is sensed. In the burn preventive device of the sanitary washing device, comprising: a hot water sensing device (10) for stopping water supply and a washing nozzle (5) for jetting hot water through the hot water sensing device (10), The movable valve (13) is movably inserted in the movable valve (13), and the movable memory (13) senses a specific temperature of hot water and a shape memory alloy member (15) and a bias spring (1).
4) is urged from the front and back by the above-mentioned shape memory alloy member (1
5) is provided with a bypass port (11c) for bypassing the water supply when the specific temperature of the hot water is sensed.
a drainage channel (17) communicating with (c) for discharging high temperature water, the hot water sensing device (10) has means for closing the water supply member (6) when a high temperature is detected, and further, the hot water sensing device (10). Reference numeral 10) is a guide (11) for holding the shape memory alloy member (15) and the bias spring (14).
d) and (11e) are provided respectively, and a burn preventive device for a sanitary washing device. 2. The bypass port (11) is a means for closing the water supply member (6) when the hot water sensing device (10) detects a high temperature.
The burn preventive device for a sanitary washing device according to claim 1, further comprising a flow rate detecting device (16) communicating with c) for discharging high temperature water and detecting a flow rate thereof. 3. The hot water sensing device (10) according to claim 1, wherein the means for closing the water supply member (6) when a high temperature is detected electrically detects the position of the movable valve (13). Burn prevention device for sanitary washing device. 4. The sanitary washing device according to claim 1, wherein the flow rate detecting device (16) closes the washing nozzle (5) and opens the drainage channel (17) when a high temperature is detected. Burn preventive device. 5. The sanitary washing device according to claim 1, 2 or 3, wherein the operation portion (18) is provided with an abnormality display function (18a) for displaying an abnormality when a high temperature is detected. Burn preventive device.