JP3246276B2 - Electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater for heating a stored liquid to keep it warm.

[0002]

2. Description of the Related Art A lid 1 of a conventional electric water heater of this kind.
Numeral 01 is composed of an outer lid 102 constituting an outer shell and an inner lid 103 on the container side as shown in FIG. 3, and the space between the outer lid 102 and the inner lid 103 is communicated by a steam passage 104 to allow the steam in the container 105 to escape to the outside. At this time, each of the outer lid 102 and the inner lid 103 includes:
Opening A106 and opening B10 leading to steam passage 104
7 were provided.

A discharge pipe 108 is provided below the container 105 so as to communicate with the inside of the container 105, and a discharge port 109 leading to the outside is provided at the tip of the discharge pipe 108.

[0004] The lid 101 is pivotally supported on the negative side of the spout 110, and an upper opening of the container 105 is provided so as to be openable and closable, and a lock knob 1 slidably provided inside the inner lid 103.
11 into the groove 112 of the spout 110,
5 was held in a closed state.

[0005] On the other hand, in the electric water heater, it is necessary to minimize the outflow of hot water in the container when the body falls, and a valve 113 is provided in the opening B107 portion of the inner lid 103, and when the body falls, the valve is closed. 113 closed the opening B107 to prevent the liquid in the container 105 from flowing out. That is, the valve 113 normally falls below the decorative frame 114 provided on the container side of the inner lid 103, and the opening B107 is in an open state.
It moved to 07 and was blocked.

[0006]

However, in the above configuration, when the lid is rapidly rotated and closed, the lid is closed while the valve is moved to the opening B by the inertial force.

For this reason, if the lid is suddenly closed during water heating, steam is not discharged to the outside of the lid through the opening B, so that when the vapor pressure rises and the lid is opened, the lid is suddenly pressed by the pressure. There was a problem that hot water was scattered outside the body.

[0008] In view of the above, the present invention provides an electric water heater that is safe without hot water splattering outside the body and has excellent operability.

[0009]

According to the first aspect of the present invention, there is provided a container for storing a liquid, a discharge pipe communicating with the inside of the container disposed on the side of the container, and a tip of the discharge pipe located above the container. And a lock knob slidably disposed in the inner lid and the inner lid facing the container side and the outer lid and an inner lid facing the container side portion. A lid is provided, and the lid is pivotally supported on one side of the spout to open and close the upper opening of the container, and the other side is fitted with a lock knob in a groove provided in the spout. The upper opening of the container is held in a closed state, and the inner lid is provided with a first vapor passage and a second vapor passage leading to the opening A of the outer lid, and connects the first vapor passage and the container. An opening B is provided, a valve A for opening and closing the opening B is slidably provided, and an opening connecting the second steam passage and the container is provided. The provided C, urges the valve B is always close direction for opening and closing the opening C, closure of the lid
When the lock knob slides, the lock knob
One side abuts on the valve B, against the biasing force of the valve B
The opening C is opened .

In the invention according to claim 2, the urging force of the valve B in the invention according to claim 1 is set so as to open the opening C when the pressure in the container is equal to or higher than the pressure increase value. .

[0011] Then, the invention according to claim 3, wherein the intended than fitting distance between spout groove of the lock knob in the invention according to claim 1, configured to reduce the gap between the locking knob and the valve B is there.

[0012]

According to the operation of the first aspect of the present invention, a second steam passage is provided, and an opening C connecting the second steam passage and the container is provided at the opening C.
The valve B that opens and closes the opening C is always urged in the closing direction, and when the lock knob slides when the lid is closed, the lock is locked.
One side of the knob contacts valve B, and resists the biasing force of valve B.
In order to open the opening C, the lid is rapidly closed and the first steam
Even if the valve A closes the opening B connecting the passage and the container, the lid is closed.
When stopped, the pressure in the container is reduced via valve B by opening valve B.
Upon compression, valve A opens opening B.

The operation of the invention according to claim 2 is as follows.
Since the urging force of the valve B is set so as to open the opening C when the pressure in the container is equal to or higher than the pressure increase value, hot water is discharged from the discharge port due to a rise in the vapor pressure in the container when the lid is rapidly closed. Not only does this occur, but the valve B does not open the opening C since the pressure in the container when the valve A closes the opening A does not become higher than the rise value of the pressure when the body is in the overturned state.

The operation of the invention according to claim 3 is as follows.
By setting the gap between the lock knob and the valve B smaller than the fitting distance of the lock knob with the spout groove, the valve A is closed during the water heater, the valve A closes the opening B, and the pressure in the container increases. However, when the lock knob is slid to open the lid, the lock knob contacts the valve B and opens the opening C before the lock knob comes off the groove of the spout, so that the pressure in the container is reduced. Since the pressure is reduced, the lid is not subjected to pressure.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a substantially cylindrical liquid storage container, and the lower end of the heat transfer plate on which the heating element 2 is mounted is liquid-tightly fixed by welding or other means. ing.
A pipe-shaped waterproof fitting 3 is provided on the bottom surface of the container 1 and is connected via a bushing 4 to an electric pump 5 which is a lead-out means.

The electric pump 5 has a function of sucking the liquid in the container 1 from the water inlet 6 connected to the bushing 4 and connecting it to the discharge pipe 8 which is one of the lead-out paths 7 to send out the liquid. I have.

A water pipe bushing 10 having a flow control valve 9 is provided at the end of the discharge pipe 8, and reaches a discharge port 11 at an end of the lead-out path 7. Reference numeral 12 denotes a body that wraps the container 1 through a space. Reference numeral 13 denotes a spout placed on the body 12, which holds the body 12 together with the lower hook 14.

Reference numeral 15 denotes a lid placed on the spout 13; an outer lid 16 forming an outer shell; and an inner lid 17 forming a container side.
And a lock knob 18 slidably arranged inside the inner lid 17, and the − side is pivotally supported by the spout 13 at a hinge portion 19 serving as a fulcrum of rotational movement, and the other side is provided at the spout 13. The lock knob 18 is fitted into the groove 20 to hold the upper opening of the container 1 in a closed state.

The lid body 15 includes a first steam passage 22 and a second steam passage 2 which reach the opening A21 of the outer cover 16 in the inner cover 17.
3 and an opening B connecting the first steam passage 22 and the container 1
24, a valve A25 for opening and closing the opening B24 is slidably provided, and an opening C26 for connecting the second steam passage 23 and the container 1 is provided. A valve B27 for opening and closing the opening C26 is shown in FIG. The L-shaped lever 28 as shown in FIG.
And a spring 3 which constantly urges a rubber packing 29 and a lever 28 in a closing direction at a portion which is supported by the shaft 7 and abuts on the opening C26.
0, and this urging force is a pressure increase value of 0.1 in the container 1.
The opening C26 is opened at a pressure of 03 kg / cm2 or more.

The gap between the lock knob 18 and the lever 28 is formed by the groove 20 of the spout 13 into which the lock knob 18 is fitted.
Is set to be smaller than the fitting distance.

An opening / closing operation knob 31 is pivotally supported on the outer lid 16, and one end of the opening / closing operation knob 31 is brought into contact with the lock knob 18 so as to be slidable. In the lower part of the inner lid 17,
It consists of a decorative frame 33 to which the lid packing 32 is attached.

Numeral 34 denotes a hot water supply knob provided in a part of the spout 13, which is operated to drive the electric pump 5 to draw the liquid in the container 1 out of the body. Control circuit 3
The control unit 5 controls the energization of the electric pump 5 and the energization control of the heating unit 2 in response to a signal from the temperature sensor 36.

The operation of the above configuration when the lid 15 is closed will be described. When the lid 15 is opened, the valve A25
Moves toward the opening B24 of the inner lid 17 to close the opening B24. When the lid 15 is rotated and closed at a normal speed, the valve A25 falls by gravity and moves to the decorative frame 33,
Since the valve A25 opens the opening B24 when the lid 15 is closed, the pressure in the container 1 does not increase.

However, when the lid 15 is suddenly closed, the valve A2
5 is a state in which the opening B24 remains closed due to inertial force, but slides before the lock knob 18 fits into the groove 20 of the spout 13 and comes into contact with the lever 28 of the valve B27.
The valve B27 opens the opening C26, and the pressure in the container 1 is increased to the second
The valve A25 drops in this state to open the opening B24.

Next, the operation of the valve A25 and the valve B27 when the container is turned over during water heating will be described.

When the container is turned over, the valve A25 closes the opening B24 by inertia, thereby preventing the liquid in the container 1 from flowing out.

When the body is raised in this state, the valve A25 and the flow control valve 9 are kept closed, and the pressure in the container 1 rises together with the boiling water. Pressure rises to 0.03kg
When the pressure exceeds / cm2, the valve B27 is opened from the opening C26 against the urging force of the spring 30, so that the pressure in the container 1 is reduced and the valve A25 also falls to open the opening B24.

When the opening / closing operation knob 31 is rotated to open the lid 15 before the valve B27 is opened, the lock knob 18 slides to release the valve before the lock member 18 comes off the groove 20 of the spout 13. By rotating B27 to open the opening C26 and release the pressure in the container 1 from the second steam passage 23 to the outside, no pressure is applied to the lid 15.

[0030]

According to the present invention, as described above, the second
And the valve B is closed by the urging force, so that even if the valve A is in the closed state, when the pressure in the container increases, the valve B opens to reduce the pressure in the container. It is safe to open.

Since the valve B is opened in conjunction with the sliding of the lock knob, the valve B does not remain in the closed state even when the lid is suddenly closed.

Further, even if the vessel is turned over when there is a lot of steam, such as during water heating, if the pressure in the container rises,
The valve B opens to release the pressure in the container, which is safe.

Further, even if an attempt is made to open the lid while the pressure in the container is increasing, the locking knob opens the valve B before the lid is unlocked, so that pressure is applied to the lid. Safe without any.

Therefore, the electric water heater of the present invention is safe and has a large practical effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an electric water heater according to one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the same.

FIG. 3 is a cross-sectional view of an electric water heater showing an embodiment of a conventional lid portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 8 Discharge pipe 11 Discharge port 13 Injection 15 Lid 16 Outer lid 17 Inner lid 18 Lock knob 20 Groove 21 Opening A 22 First steam passage 23 Second steam passage 24 Opening B 25 Valve A 26 Opening C 27 Valve B 28 Lever 30 Spring

Claims (3)

(57) [Claims] 1. A container for accommodating a liquid, a discharge pipe communicating with the inside of the container disposed on the side of the container, a discharge port located above the container and communicating with a tip of the discharge pipe, and a note mounted on the body. A lid having an opening, an inner lid facing the container-side portion, an outer lid disposed on the outer shell, and a lock knob slidably disposed in the inner lid; The upper side of the container is supported by the spout so that the upper opening of the container can be freely opened and closed, and the other side is fitted with a groove provided in the spout to lock the upper opening of the container in a closed state. A first steam passage and a second steam passage reaching the opening A of the outer cover in the inner cover,
An opening B connecting the first steam passage and the container is provided, a valve A for opening and closing the opening B is slidably provided, and an opening C connecting the second steam passage and the container is provided.
The valve B that opens and closes the valve always urges in the closing direction,
When the lock knob slides when closing the cover,
One side of the lock knob contacts the valve B, and the
An electric water heater that opens the opening C against a force . 2. The electric water heater according to claim 1, wherein the urging force of the valve B is set so as to open the opening C when the pressure in the container is equal to or higher than the pressure increase value. 3. The gap between the lock knob and the valve B is set smaller than the fitting distance of the lock knob with the spout groove.
An electric kettle according to claim 1 .