JP3432953B2 - Sanitary washer burn prevention device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a device for preventing burns in sanitary washing machines. 2. Description of the Related Art FIG. 6 shows a conventional burn prevention device for a sanitary washing machine.
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 the cleaning operation unit (not shown) is operated after the stool in such a state, the water feeding member 6 is operated, and the hot water is ejected from the cleaning nozzle 5 toward the local part. 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.
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 above-described apparatus for preventing burns of a sanitary washing machine, when the positive temperature coefficient thermistor 7 for controlling hot water temperature fails, the temperature becomes higher than the actual use temperature (30 to 45 ° C), and the thermostat becomes hot. Since there is no means for preventing burns up to 60 ° C. at which the 8 operates, sometimes 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;
A sanitary device comprising a heater for heating the water in the hot water tank, a hot water sensing device for sensing a specific temperature of the hot water sent from the hot water tank and stopping the sending of water, and a washing nozzle for jetting hot water via the hot water sensing device. In the burn preventive device of the cleaning device, the hot water sensing device inserts a ball, the ball is held by a shape memory alloy member for sensing a specific temperature of the hot water and a stopper, and a relief valve is provided in the hot water sensing device. The valve is fitted with a valve element and a coil spring that open the drainage channel when abnormal, a drainage pipe that bypasses water supply from this relief valve is provided, and a flow rate sensing device is provided in communication with this drainage pipe,
When the hot water sensor detects high temperature, close the water supply member,
The safety is enhanced, and an abnormality display section is provided on the operation section. Further, a guide for holding the shape memory alloy member is provided in the hot water sensing device. In the above-described apparatus for preventing burns of the sanitary washing machine, the hot water sensing device stops the water supply to the cleaning nozzle when the temperature of the shape memory alloy member is greatly displaced by the temperature change of the hot water and becomes higher than a specific temperature. Is performed surely. At that time, after the high temperature water is drained from the drain pipe, the flow rate sensor detects the increase of the flow rate, and when the flow rate becomes higher than the preset flow rate, the water supply member is closed in conjunction with the control unit, and the abnormality display unit in the operation unit Has the effect of turning on. Further, since the hot water sensing device is provided with a guide for holding the shape memory alloy member, the ball operates reliably without spring buckling or the like. FIG. 1, FIG. 2, FIG.
A description will be given based on FIGS. In FIG. 1, reference numeral 1 denotes a hot water tank having a water supply pipe 2 to which water is supplied at one end thereof and a water supply pipe 3 at the other end thereof. A heater 4 for heating water is inserted into the hot water tank 1. Reference numeral 5 denotes a washing nozzle for jetting hot water, which is installed in a sanitary washing machine (not shown).
The nozzle portion 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 not so close to the hot water temperature of 45 ° C. that there is no danger of burns. However, a malfunction of the thermo-protection device normally occurs, so that a certain temperature difference is required. It is. Reference numeral 9 denotes 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. Numeral 10 denotes a hot water sensing device of the present invention, which is a water shutoff valve mounted on the water supply pipe 3 to detect and close a specific temperature of hot water. Reference numeral 11 denotes a valve main 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. Numeral 12 denotes a ball for closing the water supply portion 11b, which is inserted into the water channel 14 and has a stopper 13 and a shape memory alloy member 15 described later.
Is held by The water inlet 11a is provided with a guide 11c. Reference numeral 15 denotes a shape memory alloy member which is inserted into the water inlet 11a side of the water passage 14 and is held by a guide 11c corresponding to the inner diameter of the water passage 14 to urge the ball 12 toward the stopper 13 to be greatly displaced when a specific temperature is reached. When the temperature exceeds a specific (transformation) temperature such as 50 ° C., for example, a martensitic transformation occurs and the coil spring is greatly deformed into a specific shape (elongated shape).
When the temperature falls below the specific temperature, the original specific shape (shrink shape)
It is reversibly deformed into, 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 denotes a relief valve. When the water pressure in the hot water sensing device 10 becomes equal to or higher than a predetermined 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 to release the hot water in the hot water sensing device 10. The water is drained from the drain pipe 17 to lower the water pressure in the hot water sensing device 10.
For example, when the high temperature is abnormal, when the ball 12 closes the water supply section 11b, the water pressure in the hot water sensing device 10 rises and becomes higher than a predetermined water pressure, the relief valve 16 opens, and the hot water in the hot water sensing device 10 is drained. Water can be drained from the nozzle 17 and the water pressure in the hot water sensing device 10 can be reduced to stop the ejection from the cleaning nozzle 5. Numeral 18 denotes a shaft impeller type flow sensor which detects the rotation of the impeller with a magnetic sensor according to the instantaneous flow rate and outputs a pulse. The flow rate measurement range is about 0.3 to 5 l / min. (Not shown). Furthermore, it is installed in communication with the drain pipe 17 of the hot water sensing device 10. An operation unit 20 has an abnormality display unit 20a which is an abnormality display function when a high temperature is detected. The operation of the apparatus for preventing burns of a sanitary washing machine having the above configuration will be described below. The water in the hot water tank 1 is heated by the heater 4, and its temperature is controlled by the positive temperature coefficient thermistor 7 from 30 ° C. to 4 ° C.
It is maintained at about 5 ° C. In such a state, when the cleaning operation unit 20 is operated after the stool, the water supply member 6 is operated, and the hot water in the hot water tank 1 is directed from the cleaning nozzle 5 to the local part from the water supply pipe 3 via the hot water sensing device 10. Erupt. However, the temperature of the hot water flowing into the hot water sensing device 10 due to the failure of the positive temperature coefficient thermistor 7 or the like should be 50 ° C.
Is exceeded, the shape memory alloy member 15 is deformed into a specific elongate shape, the ball 12 destroys the stopper 13 and the water supply section 11b
Side, and the ball 12 closes the water supply section 11b leading to the washing nozzle 5 (FIG. 2 (b)). At the same time as the water supply to the washing nozzle 5 is stopped, the water pressure in the hot water sensing device 10 rises, and when the water pressure reaches a certain level or more, the relief valve 16 opens and the high-temperature water is sent to the flow sensing device 18 via the drain pipe 17. When the flow rate increases and the flow rate exceeds a preset flow rate, the flow rate detecting device 18 senses the flow rate, interlocks with the control unit (not shown), closes the water supply member 6, and displays the abnormality display unit 20a on the operation unit 20. Lights up. When the temperature of the hot water in the hot water tank 1 rises to 60 ° C. or higher, the thermostat 8 turns on the heater 4.
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 thermostat 8 preventing the burn, the hot water sensing device 10 detects and closes the specific temperature of the hot water, so that the burn can be surely 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 sensing device 18 detects the increase in the flow rate and becomes equal to or more than a preset flow rate, the control unit (not shown) communicates with the control unit (not shown). In conjunction therewith, the power supply to the water supply member 6 is stopped, and the water flow is closed, so that the safety is high. At the same time, the abnormality display section 20a in the operation section 20 is turned on. The high-temperature water is drained from the drainage channel 17 into the toilet. Further, since the shape memory alloy member 15 is inserted into the ball 12 and the guide 11c for holding the shape memory alloy member 15 is provided in the warm water sensing device 10, the ball 12 has no spring buckling or the like.
Works reliably. According to the present invention, the shape memory alloy member of the hot water sensing device is greatly displaced by a change in the temperature of the hot water, and when the temperature exceeds a specific temperature, water is sent to the cleaning nozzle. Stop to prevent burns. At this time, high-temperature water was discharged from a relief valve attached to the hot water sensor, and a flow rate sensor for sensing the flow rate was 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, the burner can be prevented with high reliability, and the high-temperature detection signal is sent from the hot water sensing device or the high-temperature sensing device detects the high temperature and discharges the high-temperature water from the relief valve, thereby closing the water supply member and ensuring safety. The user can be notified that the burn prevention device has been activated. As described above, the mechanical reliability of the shape memory alloy member and the high temperature detection output means can provide a safe and convenient burn prevention device for a sanitary washing device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a hot water supply system diagram of a burn preventive device of a sanitary washing device showing one embodiment of the present invention. FIGS. 2A and 2B are cross-sectional views of the hot water sensing device, wherein FIG. 2A is a normal time and FIG. FIG. 3 is a sectional view taken along line XX in FIG. 2; FIG. 4 is a P view in FIG. 2; FIG. 5 is a schematic diagram of an apparatus including an operation unit. FIG. 6 is a hot water supply system diagram of a burn prevention device of a sanitary washing device showing a conventional example. [Description of Signs] 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 unit 20a Abnormal display unit

Claims (1)

(57) [Claim 1] A hot water tank (1) to which water is supplied via a water supply member (6), and a heater (4) for heating water in the hot water tank (1). A hot water sensing device (10) that senses a specific temperature of hot water sent from the hot water tank (1) to stop sending water, and a washing nozzle (5) that jets hot water through the hot water sensing device (10). In the burn prevention device of the provided sanitary washer,
A ball for stopping water supply in the event of an abnormality in the hot water sensing device (10)
The ball (12) is held by a shape memory alloy member (15) for sensing 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), and this relief valve (16) is used to
A valve (16a) and a coil spring (16b) for opening the water are inserted, and 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
When 0) detects a high temperature, the water supply to the nozzle (5) is stopped, and at the same time, the relief valve (16) is opened, the water flows into the drain pipe (17), and the flow rate of the flow sensor (18) exceeds the preset flow rate. The water-supplying member (6) is closed, and an abnormality display section (20a) provided on the operation section (20) is turned on when the water-supplying member (6) is turned on.