JPH0913470A - Scald preventive device for sanitary washer - Google Patents

Abstract

PURPOSE: To provide a scald preventive device in which when the temperature of hot water exceeds a specific temperature, a hot water detecting device stops the feed water to a washing nozzle for securely preventing the scald, and at that time the hot water detecting device is communicated with a discharge pipe to discharge the high-temperature water, and a flow rate detecting device detects the increase in the flow rate and when the flow rate exceeds a predetermined value, it stops the water feeding member, and an abnormality display part located in the operation part is lit. CONSTITUTION: A scald preventive device is provided with a hot water detecting device 10 for sensing the specific temperature of hot water and for stopping the feeding of water, and a washing nozzle 5 for jetting hot water through the hot water detecting device 10. In the inside of the hot water detecting device 10, a ball is insertedly fitted, and the ball is held by a shape-memory alloy member for sensing a specific temperature of hot water and by a stopper, and also the device is provided with a discharge pipe 17 for bypassing the feeding water through a relief valve 16. The high-temperature water is discharged through the discharge pipe 17, and a flow-rate sensing device 18 for detecting the flow rate is provided to the discharge pipe 17, and also an abnormality displaying part is provided to the operation part.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art FIG.
Shown in

[0003] In the figure, the water in a hot water tank 1 is kept at a constant temperature of 30 ° C to 45 ° C by a positive temperature coefficient thermistor 7.
Maintained to a degree. When a 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. The thermostat 8 disposed in the hot water tank 1 stops the current to the heater 4 when the temperature of the hot water reaches 45 ° C. or more, for example, 60 ° C., and simultaneously supplies a water feed member 6 (control unit) for supplying hot water to the washing nozzle 5. Turn off the current to (omitted). Thus, the thermostat 8 is provided so as not to blow hot water.
In addition, there is an example in which a hot fuse 9 is attached to the hot water tank 1 to prevent empty heating (Japanese Patent Publication No. 3-43539).

[0004]

In the above-described apparatus for preventing burns in a sanitary washing machine, when the hot water temperature control positive temperature coefficient thermistor 7 breaks down, the temperature becomes higher than the actual operating temperature (30 to 45 ° C.) and the thermostat 8 operates. Since there is no means to prevent burns up to 60 ° C, hot water (50
〜65 ° C.).

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive and reliable operation with a reasonable structure to prevent burns, and to notify a user that a burn prevention device has been operated.

[0006]

In order to solve the problems, the present invention provides a hot water tank to which water is supplied via a water supply member,
Hygiene including a heater that heats the water in the hot water tank, a hot water sensing device that senses a specific temperature of hot water sent from the hot water tank to stop the water feeding, and a washing nozzle that jets hot water through the hot water sensing device In a burner preventive device for a washing machine, a hot water sensing device inserts a ball, and the ball is held by a shape memory alloy member and a stopper for sensing a specific temperature of hot water, and the hot water sensing device is provided with a relief valve. The valve has a valve body and a coil spring that open the drainage channel in the event of an abnormality, and a drain pipe that bypasses water supply from this relief valve is provided, and a flow rate sensing device is provided in communication with this drain pipe.
When the hot water sensing device detects high temperature, close the water supply member,
The safety is enhanced and the operation display is provided with an abnormality display. Further, a guide for holding the shape memory alloy member is provided in the hot water sensing device.

[0007]

In the burn preventive device of the sanitary washer described above, the hot water sensing device ensures that the shape memory alloy member is largely displaced by the temperature change of the hot water and stops the water supply to the cleaning nozzle when the temperature exceeds a certain temperature to prevent the burn. To do. At that time, after the high temperature water is drained from the drain pipe, the flow rate detection device detects the increase in the flow rate and when it exceeds the preset flow rate, it interlocks with the control unit to close the water supply member and the abnormality display section on the operation section. Has the effect of turning on.

Further, since the hot water sensing device is provided with the guide for holding the shape memory alloy member, there is no spring buckling or the like, so that the sphere operates reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
A description will be given based on FIGS. 4 and 5.

In the figure, reference numeral 1 is a hot water tank, and a water supply pipe 2 for supplying water is provided at one end side thereof, and a water supply pipe 3 is provided at the other end side thereof. A heater 4 for heating water is inserted into the hot water tank 1. Reference numeral 5 is a washing nozzle for ejecting hot water, which is installed in a sanitary washer (not shown), and its water inlet 5a is connected to the hot water sensing device 1 which will be described later via the water supply pipe 3.
Nozzle 5b on the outlet side is open upward. Reference numeral 6 denotes a water supply member, which is an electromagnetic pump for supplying, for example, hot water to the washing nozzle 5 and is provided in the water supply pipe 2. Reference numeral 7 denotes a positive temperature coefficient thermistor for constantly 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 reaches 45 ° C. or more, for example, 60 ° C.
This is to stop the current to the water supply member 6 for supplying hot water to the water supply member 6.

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 thermal fuse 9 are respectively disposed at appropriate places in the hot water tank 1.

Reference numeral 10 denotes a hot water detecting device of the present invention, which is a water shutoff valve which is mounted on the water supply pipe 3 to detect a specific temperature of hot water and close it. Reference numeral 11 denotes a valve body of the hot water sensing device 10, in which a water passage 14 that connects the water inlet 11a and the water feeder 11b is formed. Reference numeral 12 is a ball that closes the water supply portion 11b and is inserted into the water channel 14, and is connected to the stopper 13 and the shape memory alloy member 15 described later.
Is held by The water inlet 11a is provided with a guide 11c.

Numeral 15 is a shape memory alloy member, which is inserted into the water passage 11a side of the water channel 14 and is held by a guide 11c matched to the inner diameter thereof, urges the sphere 12 toward the stopper 13 side, and largely displaces when reaching a specific temperature. Is a coil spring that, when it exceeds a specific (transformation) temperature such as 50 ° C, undergoes martensitic transformation and is greatly deformed to a specific shape (extended shape), or at 40 ° C.
Original specific shape (contracted shape) when the temperature falls below a specific temperature such as
It reversibly transforms into nickel and its composition is nickel,
It is made of an alloy such as titanium, and its transformation temperature can be arbitrarily set by changing its composition or adding other elements.

Reference numeral 16 is a relief valve, and when the water pressure in the hot water sensing device 10 exceeds a preset water pressure, the load of the water pressure becomes larger than the spring load of the coil spring 16b and pushes up the valve body 16a, so that the hot water in the hot water sensing device 10 is discharged. Water is drained from the drainage pipe 17 to reduce the water pressure in the hot water sensing device 10.
For example, when the ball 12 closes the water supply unit 11b when the temperature is abnormally high, the relief valve 16 opens when the water pressure in the hot water sensing device 10 rises and becomes higher than a preset water pressure, and the hot water in the hot water sensing device 10 is drained. The water can be drained from 17, the water pressure in the hot water sensing device 10 can be lowered, and the jet from the cleaning nozzle 5 can be stopped.

Reference numeral 18 denotes, for example, a shaft impeller type flow rate detecting device which detects the rotation of the impeller with a magnetic sensor according to the instantaneous flow rate and outputs a pulse, and the flow rate measuring range is about 0.3 to 5 liters / min. (Not shown). Furthermore, it is installed in communication with the drain pipe 17 of the hot water sensing device 10.

Reference numeral 20 denotes an operation section, which has an abnormality display section 20a having an abnormality display function when a high temperature is detected.

The operation of the burn preventive device for the sanitary washer having the above 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 about 5 ° C. When the cleaning operation unit 20 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 is directed from the water supply pipe 3 through the hot water sensing device 10 to the hot water from the cleaning nozzle 5 to the local area. Erupt.

However, due to a failure of the positive temperature coefficient thermistor 7 or the like, the temperature of the hot water flowing into the hot water sensing device 10 should be 50 ° C.
If it exceeds, the shape memory alloy member 15 is deformed into a specific elongated shape, the ball 12 breaks the stopper 13, and the water supply portion 11b.
Then, the ball 12 closes the water supply portion 11b leading to the washing nozzle 5 (FIG. 2 (b)). Then, at the same time when the water supply to the cleaning nozzle 5 is stopped, the water pressure inside the hot water sensing device 10 rises, and when the water pressure exceeds a certain setting, the relief valve 16 opens and the high temperature water flows through the drain pipe 17 to the flow rate sensing device 18. When the flow rate increases and the increase in the flow rate exceeds a preset flow rate, the flow rate sensing device 18 senses it, closes the water supply member 6 in cooperation with a control unit (not shown), and displays an abnormality display unit 20a on the operation unit 20. Light up.

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.
At the same time, the current to the water supply member 6 for supplying hot water 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 a specific temperature of the hot water and closes, so that the burn can be reliably prevented. At this time, the high temperature water is drained from the relief valve 16 attached to the hot water sensing device 10, and when the flow rate sensing device 18 detects an increase in the flow rate and exceeds the preset flow rate, a control unit (not shown) Since the power supply member 6 is energized and the water flow is closed in conjunction therewith, safety is enhanced. At the same time, the abnormality display section 20a in the operation section 20 is turned on. Further, the high temperature water is drained from the drainage channel 17 into the toilet.

In the hot water sensing device 10, the shape memory alloy member 15 is inserted into the sphere 12 and the guide 11c for holding the shape memory alloy member 15 is provided.
Works reliably.

[0024]

In the apparatus for preventing burns of a sanitary washing machine according to the present invention, the shape memory alloy member of the hot water sensing device is greatly displaced due to a change in the temperature of the hot water. Ensure prevention. At this time, since a high temperature water is discharged from a relief valve attached to the hot water sensing device and a flow rate sensing device for sensing the flow rate is provided,
In conjunction with the control unit, the water supply member is stopped and at the same time the abnormality display unit in the operation unit is turned on. In addition, since the hot water sensing device is provided with a guide for holding the shape memory alloy member by inserting the shape memory alloy member into the ball, it operates reliably without buckling or the like.

Therefore, it is possible to prevent burns with high reliability, and to send a high temperature detection signal from the hot water sensing device or to detect a high temperature by the hot water sensing device to discharge hot water from the relief valve, thereby closing the water feeding member to ensure safety. It is possible to enhance the property and inform the user that the burn preventing device has operated. 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 the 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.

2A and 2B are sectional views of the hot water sensing device, wherein FIG. 2A is a normal time and FIG. 2B is an abnormal time.

FIG. 3 is a sectional view taken along line XX in FIG. 2;

FIG. 4 is also a P view in FIG.

FIG. 5 is a schematic view of an apparatus also including an operation unit.

FIG. 6 is a hot water supply system diagram of a burn preventing device of a sanitary washing device showing a conventional example.

[Explanation of symbols]

 1 Hot Water Tank 4 Heater 5 Cleaning Nozzle 10 Hot Water Sensing Device 11c Guide 12 Ball 13 Stopper 15 Shape Memory Alloy Member 16 Relief Valve 18 Flow Rate Sensing Device 20 Operation Portion 20a Abnormality Display Portion

Claims (1)

[Claims] 1. A hot water tank (1) to which water is supplied via a water sending member (6), a heater (4) for heating the water in this hot water tank (1), and water sent from the hot water tank (1). A burn preventive device for a sanitary washer equipped with a hot water sensing device (10) for sensing a specific temperature of hot water to stop the water supply, and a washing nozzle (5) for jetting hot water through the hot water sensing device (10) At
A ball for stopping water supply in case of abnormality in the hot water sensing device (10)
(12) is inserted, and the ball (12) is held by a shape memory alloy member (15) that senses a specific temperature of hot water and a stopper (13), and a relief valve (1) is attached to the hot water sensing device (10).
6) is provided, and the relief valve (16) has a drainage channel (16c) in case of an abnormality.
A valve body (16a) for opening the valve and a coil spring (16b) are inserted, a drain pipe (17) for bypassing the water supply from the relief valve (16) is provided, and a flow sensing device is provided in the drain pipe (17).
(18) is connected, and the hot water sensing device (1
(0) when it senses a high temperature, the water supply to the nozzle (5) is stopped and at the same time the relief valve (16) is opened to let water flow into the drain pipe (17), and the flow rate sensing device (18) exceeds the preset flow rate. In this case, the burn preventing device for the sanitary washer is characterized in that the water supply member (6) is closed and the abnormality display portion (20a) provided on the operation portion (20) is turned on.