JPH06327558A - Steam rubber valve device of electric air pot - Google Patents

Abstract

PURPOSE:To provide a steam rubber valve device of an electric air pot which can release the inside pressure of a tank to outside at abnormality when the inside pressure of the tank goes up by the fall during the heating by the heater of an electric air pot or the clogging of a steam passage, etc. CONSTITUTION:A steam rubber valve 21, which opens and closes a steam passage 6 and the inside of a tank 41 by the up and down action of a push valve holder 20, is installed around the push valve holder 20 which pieces the pump base 22 of a bellows pump 24, where a pump head 23 and the pump base 2 are junctioned in upper and lower openings, and the contact face between the steam rubber valve 21 and the push valve holder 20 is formed of a thick part X and a thin part Y.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rupture of a tank due to an increase in internal pressure in the tank when an electric air pot having a built-in electric heater in the tank and a bellows pump for discharging boiling water falls down. The present invention relates to a steam rubber valve device for an electric air pot for preventing accidents.

[0002]

2. Description of the Related Art In recent years, electric air pots that have been actively used have a tank for containing a liquid inside the pot, and a heater for heating the liquid in the tank to keep it warm is attached to the bottom of the tank. In addition, in order to discharge the liquid in the tank to the outside, a bellows pump joined to the pump head and the pump base is installed inside each of the upper and lower openings of the bellows of the bellows-shaped synthetic resin thin film made of an annular fold. By pushing down the push button, which is a pusher attached to the upper part of the pump head, air is pumped into the tank.

On the other hand, there is provided a steam passage for discharging the steam generated when the liquid in the tank is heated by the heater to the outside. However, by pushing down the bellows pump, the air is pumped into the tank and the hot water in the tank is discharged. When a liquid such as is discharged, a switching valve is built in to prevent the steam from flowing out by closing the steam passage. That is, when the liquid such as water in the tank is heated and boiled, the generated steam escapes to the outside through the steam passage, and when the push button is pushed down, the liquid such as hot water in the tank is discharged. For operation, a switching valve that closes the steam passage is provided in the lower portion of a push valve holder that penetrates the pump head of the bellows pump.

As prior art in which such a switching valve device for closing the steam passage is installed, Japanese Patent Laid-Open No. 1-141612 relating to an electric water heater and Japanese Patent Publication No. 4-23522 relating to a lid of an electric water heater are known. The invention and the invention of Japanese Utility Model Publication No. 3-44115 regarding the lid of the electric water heater are known. However, in the above conventional technique, the contact surface of the switching valve, which is in contact with the push valve holder and is made of the elastic body, has a uniform thickness.

Therefore, the electric air pots such as these electric water heaters fall down while heating by the heater and the safety check valve provided in the steam passage is closed, or the steam passage is clogged and the internal pressure of the tank is reduced. When an abnormal situation occurs such that the tank pressure rises, there is a problem that the tank pressure may not escape and the tank may burst.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and the tank internal pressure rises due to the electric air pot falling over while the heater is being heated or the steam passage being clogged. It is an object of the present invention to provide a steam rubber valve device for an electric air pot that can release the tank internal pressure to the outside even in the case of an abnormality.

[0007]

In order to achieve the above object, a steam rubber valve device for an electric air pot of the present invention is a bellows having a pump head joined to an upper opening and a pump base joined to a lower opening. On the outer periphery of the push valve holder penetrating the pump base of the pump, a steam rubber valve that opens and closes the steam passage and the inside of the tank by the vertical movement of the push valve holder is attached, and the steam rubber valve and the push valve holder It is configured by forming the contact surface with a thick part and a thin part, and in normal times, the contact surface of the steam rubber valve and the push valve holder is in good contact for good sealing, while on the other hand, in the case of a fall or in the steam passage. When the internal pressure rises abnormally due to clogging or the like, the thin wall portion of the contact surface is deformed by the abnormal internal pressure and the abnormal internal pressure is released into the bellows pump to maintain safety.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an upper portion of an embodiment of an electric air pot equipped with a steam rubber valve device of the present invention, and FIG. Figure 1
5 is a plan view of the steam rubber valve of FIG. 3, FIG. 3 is a side sectional view in the direction AA of FIG. 2, FIG. 4 is a plan view of the push valve holder of FIG. 1, and FIG.
4 is a side sectional view taken along line BB of FIG. 4, and FIG. 6 is a side view of FIG.

First, in the electric air pot shown in FIG. 1, the central portion of the upper surface of the upper lid 8 is opened in a tubular shape, and a push button, which is a pusher, is provided on the inner periphery of a guide tube which is provided so as to project downward on the periphery of the open portion. 2 is inserted. A push valve 18 is provided on the lower surface of the center of the push button 2, and the push valve 18 has an annular opening in which a pump head 23 is joined to the upper opening and a pump base 22 is joined to the lower opening. The bellows pump 24 made of a bellows-shaped synthetic resin thin film has a central portion of the pump head 23.

The upper and lower openings of the bellows pump 24 are joined to the pump head 23 and the pump base 22 by ultrasonic welding on the entire circumference. next,
In this embodiment, there is a push valve holder 20 partially penetrating the pump base 22, a steam rubber valve 21 is mounted around the push valve holder 20, and the push valve holder 20 and the push valve holder 20. A small-diameter pump spring 25 is mounted between the two, and a semi-circular rubber ring 19 is mounted around the bottom of the push valve 18.

Further, a medium diameter pump spring 17 and a large diameter pump spring 25 are mounted between the pump head 23 and the members of the pump base 22. On the other hand, the upper lid 8 is provided with a lock lever 14 having a lock spring 15 interposed therein, a lock button 1 which can be moved in a two-dot chain line state, and the push button 2 can be stopped from being pressed. As shown in the figure, a stopper 11 is provided that can slide back and forth in the figure.

An inner lid rubber packing 4 is fitted around the inner lid 3, and a steam rubber packing 5 is attached to the central portion of the inner lid 3. Further, a tank 41 for containing a liquid is provided on the lower surface of the inner lid rubber packing 4 via the tank rubber packing 40, and the steam generated by being heated by a heater (not shown) provided at the bottom of the tank 41 is the first
Second steam passage 13 leading from the steam passage 6 to the steam outlet
The steel ball 7 is provided in the steam passage 13 as a safety valve when the electric air pot falls.

Therefore, the bellows pump 2 is installed in the tank 41.
By pumping air at 4, liquid such as hot water in the tank 41 rises in the hot water supply pipe 42 and is discharged from the hot water supply port 44 while lifting the water shutoff valve 43. Reference numeral 45 in the figure denotes a handle for carrying the air pot. Next, the push valve 1 penetrating the pump head 23.
A member of the push valve holder 20 is provided in engagement with a claw member formed to project into the bellows pump 24 at the lower part of 8, and the push valve holder 20 penetrates the pump base 22. , Its push valve holder 2
On the outer circumference of 0, the push valve holder 20 has a push valve 1
8 moves up and down by the steam passage 6 and the tank 41
A steam rubber valve 21 is mounted so as to open and close the inside and the inside.

That is, as shown in FIGS. 4, 5 and 6, on the outer periphery of the push valve holder 20 having a contact surface composed of a flange portion that contacts the steam rubber valve 21, the silicone rubber shown in FIGS. Is attached to the tank 41 and the bellows pump 24 by connecting or disconnecting the bottom peripheral portion of the steam rubber valve 21 and the steam rubber packing 5, or The steam generated in the tank 41 is transferred to the bellows pump 2
4 functions as a switching valve that guides the steam passage 6 without introducing the steam passage 6.

Therefore, a thick portion X and a thin portion Y are formed on the flange portion, which is the contact surface of the steam rubber valve 21 with the push valve holder 20, as shown in FIGS. 2 and 3. According to the steam rubber valve device configured as described above,
Normally, it functions as a switching valve between the bellows pump 24, the tank 41, and the steam passage 6 with good sealing performance, and when the internal pressure rises abnormally due to a pot overturn or steam clogging, the abnormal internal pressure force By pushing up and deforming the thin portion Y upward, the tank internal pressure escapes into the bellows pump 24 and leaks to the outside from the gap in the upper portion of the bellows pump 24, so that safety is maintained.

[0016]

According to the electric air pot which employs the steam rubber valve device of the present invention described above, when the tank internal pressure rises abnormally due to overturning of the pot, clogging of the steam passage, etc., the valve element of the steam rubber valve comes into contact. By deforming part of the surface,
Since the abnormal internal pressure is released, the safety of the electric air pot can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing only an upper portion of an embodiment of an electric air pot equipped with a steam rubber valve device of the present invention.

FIG. 2 is a plan view of the steam rubber valve of FIG.

FIG. 3 is a side sectional view taken along line AA of FIG.

4 is a plan view of the push valve holder of FIG. 1. FIG.

5 is a side sectional view taken along the line BB of FIG.

FIG. 6 is a side view of FIG.

[Explanation of symbols]

6 Steam Passage 20 Push Valve Holder 21 Steam Rubber Valve 22 Pump Base 23 Pump Head 24 Bellows Pump 41 Tank X Thick Wall Y Thin Wall

Claims (1)

[Claims] 1. A push valve holder outer periphery, which is provided through a pump base of a bellows pump having a pump head joined to an upper opening and a pump base joined to a lower opening,
An electric air pot in which a steam rubber valve that opens and closes the steam passage and the inside of the tank by the vertical movement of the push valve holder is mounted, and the contact surface between the steam rubber valve and the push valve holder is formed by a thick part and a thin part. Steam rubber valve device.