JPH07286757A - Showering hose for electric water heater - Google Patents

Abstract

PURPOSE:To continue a water flowing state without complete closure even if a showering hose is bent, to maintain a pressure switch of a hydraulic pressure detector in a normal operation, to resultantly eliminate abnormal rise of a hot water temperature in a tank, and to obviate influence of a dangerous state to a user. CONSTITUTION:A showering hose 21 is connected to a hot water output tube of an electric instantaneous water heater via a body nut 34, and connected to a showering head via a showering nut 35. An inclusion 36 made of a columnar resin material is inserted into a water passage of the hose 21, locked at an end of the hose 21 with a spring 37 so that the inclusion 36 may not be easily removed. Even if the hose 21 is bent during hot water outputting, the passage is not completely blocked with spaces remained at both sides of a section of the inclusion 36, and hence abnormal rise of hot water temperature in the tank is prevented. Thus, output of hot water of high temperatures at the time of next use can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shower hose for an electric instant water heater used for a hot water shower.

[0002]

2. Description of the Related Art A conventional electric instant water heater will be described with reference to FIGS. As shown in the figure, the water flowing in from the water inlet pipe 1 passes through the water stopcock 2 and the flow rate control valve 3, and activates the pressure switch 5 of the water pressure detector 4 to heat the heater 6
The water is heated in the tank 7 having the water and flows out of the shower head 10 via the shower hose 9 connected to the hot water outlet pipe 8. As for the hot water temperature at this time, the heat generation amount of the heater 6 can be adjusted by the water temperature and the flow rate. Therefore, in order to obtain a comfortable hot water temperature, the hot water temperature is adjusted in advance to the desired hot water temperature by the volume adjusting volume 11, and the resistance values of the thermistor 12 for detecting the hot water temperature of the tank 7 and the volume adjusting volume 11 are compared by the control circuit 13. Then, the energization rate of the heater 6 is controlled to adjust the hot water temperature to a desired value. Note that the tank 7 is provided with a protector 14 that prevents heating in the event of an abnormality. However, the water pressure detector 4 is of a pressure detection type, and in the case of an abnormality such that the secondary shower hose 9 of the water pressure detector 4 is blocked, the pressure switch 5 of the water pressure detector 4 is turned on and the heater is heated. The energization of 6 continues, and then the thermistor 12 and the protector 14 are activated and the heater 6 circuit is turned off. When the shower hose 9 is bent as shown in FIG. 14 and FIG. 15, the bent portion 15 of the shower hose 9 is completely closed, and the shower head 10 stops flowing out.

[0003]

However, in the above-mentioned conventional configuration, the shower hose 9 is accidentally bent during use by the user, and hot water leaks from the shower head 10.
When stopped, the pressure switch 5 of the water pressure detector 4 remains in the ON state, the heating heater 6 continues to be energized, and then the thermistor 12 and the protector 14 operate to turn off the heating heater 6 circuit. However, since the temperature of the hot water in the tank 7 has already risen abnormally, when the shower hose 9 is opened next time, hot water suddenly flows out from the shower head 10 and the user is in a dangerous state. There are drawbacks.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a safe electric instant water heater.

[0005]

In order to achieve the above object, the present invention provides a tank having a heater, a water inlet pipe watertightly connected to the water inlet side, a water stopcock, and a flow control valve. A water pressure detector is provided, and a water circuit with a hot water outlet pipe on the water outlet side is configured, and a thermistor for detecting the hot water temperature in the tank and the heating heater are connected in series with a pressure switch provided in the water pressure detector. And a controller. The controller controls the heating heater to control the hot water temperature.
Further, the hot water outlet pipe is provided with a watertightly connected shower hose, and an inclusion having a polygonal cross section is loosely fitted over substantially the entire length of the shower hose and locked at the end of the shower hose. .

The shower hose is formed by extrusion molding, and a polygonal inclusion is integrally formed in the shower hose during the molding.

[0007]

According to the present invention, the shower hose is not completely closed even when the shower hose is bent, the running water state is continued, and the pressure switch of the water pressure detector is maintained in normal operation. The hot water temperature did not rise abnormally,
Be safe without putting the user in a dangerous condition.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric instant water heater of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of an electric instant water heater. 16 is a water inlet pipe, 17 is a water stop valve knob, 18 is a flow rate control valve knob, 19 is a capacity control knob, 20 is a hot water outlet pipe, and 21 is a shower hose. , 22 are shower heads. FIG. 2 is an internal configuration diagram of the electric instant water heater, in which 23 is a water stopcock, 24 is a flow rate control valve, 25 is a volume control volume, 26 is a tank, 2
7 is a control circuit, and 28 is a thermistor.

As shown in FIGS. 3 and 4, the water that has flowed in from the water inlet pipe 16 passes through the water stopcock 23 and the flow rate control valve 24, and activates the pressure switch 30 of the water pressure detector 29 to turn on the heater 31. Water is heated in the tank 26 provided therein and flows out of the shower head 22 via the shower hose 21 connected to the hot water outlet pipe 20. As for the hot water temperature at this time, the heat generation amount of the heater 31 can be adjusted by the water temperature and the flow rate. Therefore, in order to obtain a comfortable hot water temperature, the volume adjusting knob 19 is used to adjust the hot water temperature to a desired one in advance, and
The controller 27 compares the resistances of the thermistor 28 for detecting the hot water temperature and the capacity adjusting volume 25 with the controller 27 to control the energization rate of the heater 31 to adjust the hot water temperature to a desired value. In addition, the tank 26 is provided with a protector 32 that prevents heating in the event of an abnormality.

The pressure switch 30 of the water pressure detector 29 is attached via a diaphragm 40 and a pressure receiving plate 41, and when water pressure is applied to the diaphragm 40, the pressure receiving plate 41 presses the pressure switch 30 to turn it on. When the pressure is not applied, the pressure receiving plate 41 moves the spring 4
The diaphragm 40 is pushed back by 2 and the pressure switch 3
0 is turned off.

FIG. 5 is a completed view of the shower hose, and 34 is a main body nut that is connected to the tap pipe 20 of the electric instant water heater.
The shower nut 35 is connected to the shower head 22.
A cylindrical inclusion 36 made of a resin material having water resistance is loosely fitted in the shower hose 21, and the inclusion 36 is locked by springs 37 at both ends of the shower hose 21. However, as shown in FIG. 7 and FIG. 8, the cross section of the inclusion 36 at the bent portion 38 of the shower hose 21 is bent even when the shower hose 21 on the downstream side of the water pressure detector 29 is bent. Since the openings on both sides 39 remain, it will not be completely closed and the shower head 22
Since the hot water continues to flow out from the hot water, the hot water temperature is controlled and the hot water temperature does not rise abnormally.

FIG. 9 shows an inclusion 43 in the shape of a quadrangular prism over the entire length of the shower hose 21 in which the openings on both sides 39 of the cross section of the inclusion 43 become larger when the shower hose 21 is bent. FIG. 10 shows that the cylindrical inclusions 44 are simultaneously formed during extrusion molding of the shower hose 21. FIG. 11 shows that the rectangular column-shaped cord 45 is simultaneously molded during extrusion molding of the shower hose 21.

The above-mentioned inclusions are the shower hose 2
In the case of a separate body from 1, it is a resin material such as an elastic body such as rubber, a bundle of metal wires such as wires, and the like, which is relatively flexible in the longitudinal direction and whose cross-section does not change and which is water resistant and durable It can be used. When the shower hose 21 and the shower hose 21 are simultaneously molded, the same material as the shower hose 21 is used.

In this embodiment, the inclusion has a square shape, but other shapes such as a round shape, a hexagonal shape and a star shape are also conceivable.

[0016]

As described in the above embodiments, the shower hose of the present invention is provided with a shower hose which is loosely inserted into the shower hose of the present invention over its entire length and locked at the end of the shower hose. Since the passage of hot water can be prevented from being completely closed even when is bent, it is possible to provide a safe electric instant water heater without the temperature of the hot water in the tank rising abnormally.

By providing the above-mentioned inclusions integrally in the shower hose at the time of molding the shower hose, the same effect can be obtained.

[Brief description of drawings]

FIG. 1 is an external view of an electric instant water heater according to an embodiment of the present invention.

FIG. 2 is an inner view of the electric instant water heater of the embodiment.

FIG. 3 is a water circuit and electric circuit diagram of the same embodiment.

FIG. 4 is a water pressure detector diagram of the water circuit of the embodiment.

FIG. 5 is a completed view of the shower hose of the same embodiment.

FIG. 6 is a partial sectional view of the shower hose of the same embodiment.

FIG. 7 is a bent state diagram of the shower hose of the same embodiment.

FIG. 8 is a sectional view of a bent portion of the shower hose of the same embodiment.

FIG. 9 is a shape diagram of inclusions in the shower hose of the same embodiment.

FIG. 10 is a coextrusion molding diagram of the shower hose of the same example.

FIG. 11 is a coextrusion molding diagram of a shower hose of another embodiment.

FIG. 12 is a conventional water circuit and electric circuit diagram.

FIG. 13 is a water pressure detector diagram of a conventional water circuit.

FIG. 14 is a bent state diagram of a conventional shower hose.

FIG. 15 is a sectional view of a bent portion of a conventional shower hose.

[Explanation of symbols]

 31 Heater 26 Tank 16 Water Intake Pipe 20 Hot Water Pipe 29 Water Pressure Detector 24 Flow Control Valve 23 Water Stopper 30 Pressure Switch 27 Controller 28 Thermistor 21 Shower Hose 22 Showerhead 36 Inclusion 37 Spring

Claims (2)

[Claims] 1. A tank having a heater, a water inlet pipe watertightly connected to the tank on the water inlet side, a water stopcock, a flow control valve, and a water pressure detector, and a hot water outlet pipe on the water outlet side. A water circuit is provided, and a thermistor for detecting the temperature of the hot water in the tank, a heater connected to the heater in series with a pressure switch provided in the water pressure detector, and a controller,
The controller controls the heater to control hot water temperature. Further, the hot water outlet pipe is provided with a shower hose connected in a watertight manner, and an inclusion having a polygonal cross section is loosely fitted over substantially the entire length of the shower hose, and the electric instant hot water is locked at the end of the shower hose. Shower hose for a water heater. 2. The shower hose for an electric instant water heater according to claim 1, wherein the shower hose is molded by extrusion molding, and a polygonal inclusion is integrally molded in the shower hose during the molding.