JPH0443164Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a water heater in which a steam path and a drain path are formed in a lid body for opening and closing the container body.

[Conventional technology]

2. Description of the Related Art Conventionally, electric water heaters equipped with boiling heaters called electric pots have been known. Such water heaters are appropriately provided with a steam path in order to reduce the pressure inside the container that occurs when boiling water.

[The problem that the idea aims to solve]

When forming the steam path, care must be taken to ensure that the steam path does not narrow the opening of the container body and impede the replenishment of hot water or water (hereinafter collectively referred to as hot water) to the container. be.
For this reason, it is advantageous to provide the steam path on the lid body side rather than on the container body side. However, since an attached mechanism such as an air pump is usually built in the lid body, the steam path should not be provided on the lid body side. It is necessary to form a winding route with detours, and if this is done, there is a problem that condensed water accumulates in the steam path.

Furthermore, when a steam path is provided, there is a problem in that when the water heater falls over, hot water in the container leaks out through the steam path.

[Means to solve the problem]

The present invention provides a steam venting device for a water heater that solves the above problems.

The means of the present invention includes a container body 1 equipped with an electric heater 8, a shoulder member 13 provided on the upper part of the container body 1, and a container body 1 that is pivoted to the shoulder member 14 at the back. and a lid body 2 that can be opened and closed to open and close the container body, forming an injection channel from the bottom of the container body 1 to the water inlet 13 via a pumping channel 27, and a valve body for shutting off water in the injection channel. In the water heater equipped with a valve chamber 30 having a valve chamber 32, the lid main body 2 has a steam path 57 including a steam pipe 63 that communicates the inside of the container main body 1 with the outside air when the lid is closed, and a steam path 57 that branches from the steam path. A drain passage 66 guided to the back of the lid main body is formed; the drain passage 66 is formed in a cylindrical shape from an elastic material such as rubber, and the drain passage 66 is formed in a cylindrical shape from an elastic material such as rubber.
The inner circumferential wall 13 of the shoulder member 13 opens downward to the upper space of the container body 1 and when the lid is closed.
A thermistor 68 for controlling the heater 8 is positioned opposite to the inside of the drain passage 66 when the lid body 2 is closed. The steam pipe 63 is provided on the shoulder member 13 so as to
An elastic cylindrical body that extends along the inside of the upright wall 37a that stands up from the base 37 of the lid main body 2 and constitutes the drain passage 66 is inserted through the upright wall 37a, and the elastic cylindrical body connects the steam pipe 63 and the upright wall. 3
7a are elastically connected and held together.

As a result, a steam path is formed in the lid body, and a drain path branched from the steam path is formed.
The drain path is automatically closed when the lid is closed, and the drain path is automatically opened when the lid is opened to replenish hot water, etc., thereby allowing water accumulated in the steam path to return to the container. I can do it. Moreover,
Since a thermistor can be placed in the steam path via this drain path, the boiling temperature of the hot water in the container can be accurately detected and the temperature of the hot water can be suitably controlled.

In addition, the present invention is configured as another means: a container main body 1 provided with a shoulder member 13 on the upper part; and a lid main body 2 which is pivoted on the shoulder member 14 at the back and covers the container main body so as to be openable and closable. In a water heater comprising: an injection channel extending from the bottom of the container 1 to the water injection port 13 via a pumping channel 27; and a valve chamber 30 having a valve body 32 for shutting off water interposed in the injection channel: Valve chamber 3
0 comprises a pair of structural members including a valve body receiving member 33 and a valve body 32 inserted into the valve body receiving member 33;
The lid body 2 forms a steam passage 57 that communicates the inside of the container body 1 with the outside air when the lid is closed, and a valve chamber 64 for shutting off water is interposed in the steam passage 57. The valve body receiving member 33a and the valve body 32a are a pair of constituent members, which are the same constituent members as the valve body receiving member 33 and the valve body 32 described above.

This prevents a large amount of hot water in the container from leaking out through the steam path when the water heater falls over. Moreover, a pair of constituent members, the valve body receiving member and the valve body, which constitute the main part of the water stop valve device, are mutually shared parts by the constituent members in the pumping path and the constituent members in the steam path. Therefore, low-cost production is possible due to mass supply.

〔Example〕

An embodiment of the present invention will be described in detail below based on the drawings.

As shown in FIGS. 1 and 2, the electric water heater consists of a container body 1 and a lid body 2.

The container body 1 has a double-walled structure, including a bottomed cylindrical container 3 with an open top and a cylindrical case 4 made of a thin metal plate or the like that surrounds the outer periphery of the container 3 at intervals. be done.

The container 3 has a double wall structure consisting of an inner container 3a and an outer container 3b made of thin stainless steel plates, etc., and a vacuum section 3c extending from the peripheral wall to the bottom wall is formed between the inner and outer containers 3a and 3b. . As shown in FIG. 2, the bottom walls of the inner and outer containers 3a, 3b are connected by a cylinder 3d that opens vertically at the center, and is connected by a lead-out cylinder 6 that opens vertically at a position offset from the center to the front side. connected. Among the containers 3, at least the bottom wall of the inner container 3a (in the illustrated example, the inner container 3
a and the bottom walls of the outer container 3b) are recessed downward at the center than at the periphery to form a hot water retention section 7,
A submersible heater 8 is disposed within the retention section 7. That is, this underwater heater 8 has the cylindrical body 3d.
The submersible heater 8 and the upper opening of the cylindrical body 3d are watertightly joined by a gasket 10, and the lead wire 8a of the submersible heater 8 is connected to an insulator 8b. The inner circumference of the support tube 9 is guided along the inner circumference of the support tube 9 while the support tube 9 is held in place, and is led out below the support tube 9. Further, a lower thermistor 10 is provided by inserting the support cylinder 9 in the cylinder 3d, and the tip detection part of the lower thermistor 10 is connected to the retention part 7.
It is made to protrude further and is located within the hot water storage chamber within the inner container 3a. This lower thermistor 10 is held at its outer circumference by a holding cylinder 11.
The upper end of the holding cylinder 11 is fitted in a watertight manner to the underwater heater 8, and the upper end of the holding cylinder 11 and the outer circumference of the lower thermistor 10 are held in a watertight manner by a packing 12.

As shown in the first figure, a shoulder member 13 is attached to the upper part of the container body 1, and the shoulder member 13 is integrally molded from synthetic resin, connects the upper end of the container 3 and the case 4, and has a structure on the back surface that will be described later. It is provided with a pivot portion 14 of the lid main body 2 and a beak portion 15 on the front side.
A decorative member 16 is connected to the lower part of the beak portion 15, and a transparent window portion 17 extending in the vertical direction is formed in the decorative member 16.

As shown in the second figure, a synthetic resin bottom member 18 is attached to the bottom of the container body 1, and the bottom member 18 forms a protection chamber 19 recessed from below to above. A printed circuit board 20 is placed in the holding chamber 19.
is stored. Further, the upper wall of the protection chamber 19 is recessed downward to form a storage chamber 21 in which the tail ends of the support tube 9 and the lower thermistor 10 are accommodated. A cover plate 22 made of a metal plate is attached to the bottom of the bottom member 18, and the lower opening of the protection chamber 19 is closed by the cover plate. In addition, the lid plate 2
Parts such as the triax 23 that should be placed separately from the printed circuit board 20 are mounted on the cover plate 21.
With the component 23 attached to the bottom member 18, the component 23 is inserted into the bottom member 18 through the lower opening. In the figure, reference numeral 24 denotes container attachment bosses, which are provided at a plurality of locations at intervals in the circumferential direction of the bottom member 18 and connect the bottom member 18 and the container 3 to each other. Further, 25 is a power plug.

The outlet tube 6 of the container 3 is connected to the beak 1 of the shoulder member 13.
It communicates with a water inlet 26 opened at the lower part of 5 via a pumping channel 27. In the illustrated example, the window portion 17
The lower end of the liquid level display tube 28 arranged corresponding to the
It is connected to the outlet tube 6 of the container 3 via an elbow tube 29. Further, the upper end of the liquid level display tube 28 is connected to a valve chamber 30 provided at the tail end of the water inlet 26 via an elbow tube 31. A valve body receiving material 33 is assembled in the valve chamber 30, and a valve body 32 formed in a block shape from a heavy material such as stainless steel is inserted into the valve body receiving material 33. A narrow passage is formed between the outer circumference of the valve body 32 and the inner circumference of the valve body receiving member 33 by ribs 34 in the radial direction. When the hot water in 3 is pumped to the pumping channel 27, the hot water enters from the lower inlet 35 of the valve body receiving member 33, passes through the valve chamber 30 through the narrow passage formed by the rib 34, and enters the inlet. It is discharged from 26. On the other hand, when the air pot falls over, the valve body 32 moves within the valve body receiving member 33 and closes the water stop port 36 of the valve chamber 30, so that a large amount of hot water in the container 3 flows through the pumping channel 27 and from the water inlet. Prevent leakage.

The lid main body 2 is formed into a hollow block body by a synthetic resin bowl-shaped base 37 that is loosely fitted into the shoulder member 13 and a head 38 that covers the upper part of the base 37. is pivotally supported on the pivot portion 14 of the shoulder member 13 via a pivot shaft 14a. Therefore, the lid main body 2 is rotatable about the pivot 14a, and thereby the upper opening of the container main body 1 can be opened and closed. An engagement/disengagement mechanism 39 is provided on the front side of the lid main body 2, and the entire lid 2 is engaged with/disengaged from the shoulder member 13 while the lid 2 is attached to the container body 1.

A bellows-type air pump 40 is installed on the base 37 of the lid body 2, and the cylindrical lower edge of the air pump is fixed to the base 37, and the periphery of an operating member 41 is fixed to the cylindrical upper edge. . The actuating member 41 forms a guide cylinder part 42 that projects into the air pump, and a valve cylinder 43 is slidably inserted into the guide cylinder part 42. The lower end of the valve cylinder 43 is inserted through an exhaust port 44 formed in the base 37, and the insertion end is provided with a switching valve 45 made of an elastic body that swells to a large diameter below the exhaust port 44. Inside the air pump 40, a pump return member 46 made of a compression coil spring is interposed between the base 37 and the operating member 41, and is always biased in the direction of pushing up the operating member 41 and inflating the air pump 40. are doing. Valve cylinder 4
3 is provided with a locking portion 47 that is locked to the guide cylinder portion 42 in an extended state, and presses the switching valve 45 to the exhaust port 44 when the air pump 40 is expanded.

An actuating button 49 is slidably inserted into an opening cylindrical portion 48 located above the actuating member 41 and opened in the head 38 . When the locking pawl 50 formed on the outer peripheral edge of the lower end of the actuation button 49 is engaged with the lower edge of the opening cylindrical portion 48, the top surface of the actuation button 49 is substantially flush with the top surface of the head 38. , the actuation button 49 does not protrude upward any further. On the other hand, a locking member 51 is rotatably fitted on the outer periphery of the opening cylindrical portion 48, and when the locking member 51 is rotated in one direction via a knob 51a, a locking claw at the lower end of the locking member 51 is engaged. is engaged with the lower surface of the locking pawl 50 of the operating button 49, thereby making it impossible to press the operating button 49.
On the contrary, when the locking member 51 is rotated in the other direction,
The locking of the pawl is released so that the actuation button 49 can be pressed. A receiving part 52 is formed at the lower part of the operating button 49, and the receiving part 52
and the bottom of the valve cylinder 43, the pump return member 4
A button return member 53 made of a compression coil spring with a spring constant smaller than 6 is interposed, and the operating button 49 is always
is biased upward. In this state, the intake valve 54 made of an elastic body and attached to the lower end of the receiving part 52 is positioned at a distance above the upper opening edge of the guide cylinder part 42 .

The exhaust port 44 is connected to the container 3 via an air supply path 55.
It communicates with an air supply port 56 that opens near the top of the. Further, the air supply path 55 communicates with an outside air port 58 opened in the head 38 via a steam path 57. In the illustrated example, an air flow path member 59 forming a switching valve chamber of the switching valve 45 is attached to the lower surface of the base 37,
The flow path member 59 provides a port 60 located at the lower center of the switching valve chamber.
The air supply passage 55 is arranged parallel to the switching valve chamber and communicated with the switching valve chamber, while a branch passage 61 extending from the port 60 to the steam passage 57 is defined. The branch passage 61 is connected to a steam pipe 63 via a pipe material 62, and the steam pipe 63 is communicated with the cylindrical boss portion 58a forming the outside air port 58 via a water stop valve chamber 64. A steam path 57 is configured from the branch path 61 to the outside air port 58.

A protective plate 65 made of a stainless thin steel plate or the like serves as the pipe material 6 that constitutes the flow path member 59 and the steam path 57.
2 and the steam pipe 63 from below, and is fixed to the bottom of the base 37 with screws. still,
In the figure, reference numeral 65 denotes a handle that is disposed across the top of the lid body 2 and has both ends pivoted to the container body 1.

The steam path 57, specifically the steam pipe 63, includes:
A drain path 66 that branches and leads to the back of the lid body 2
is formed. This drain passage 66 is formed into a cylindrical shape made of an elastic material such as rubber, and the tail end of the cylindrical part is fitted in a watertight manner into an insertion hole made in the back of the steam pipe 63, and the tip of the cylindrical part is The cylindrical portion is fitted into an insertion hole formed in the upright wall 37a of the base portion 37 to be inserted through the hole, and the tip opening edge 67 of the cylindrical portion is inserted into the upright wall 37a.
It protrudes from the back of a. That is, as shown in the first diagram, the steam pipe 63b is connected to the base 3 of the lid body 2.
The drain passage 66 is elastically connected to and held by an elastic cylindrical body forming the drain passage 66 along the inside of the standing wall 37a rising from the drain passage 66. Thus, when the lid main body 2 is closed, the tip opening edge 67 of the drain passage 66 is brought into close contact with the inner circumferential wall 13a of the shoulder member 13, thereby providing a position where the tip opening of the drain passage 66 is closed in a watertight manner. It is composed of related things. That is, when the lid is closed, the tip opening edge 67 is elastically compressed and deformed and comes into close contact with the inner circumferential wall 13a of the shoulder member in a watertight manner, so that the steam path 57
The steam from the drain passage 66 does not flow out from the opening edge 67 of the drain passage 66 and wet the inner circumferential wall 13a of the shoulder member and around the pivot shaft 14a.

On the other hand, the tip opening edge 67 of the drain path 66 is
It is preferable that the lid body 2 be located as far down as possible from the pivot 14a of the lid body 2.
When opened using 4a as a fulcrum, it opens downward with respect to the lid body 2 and into the space above the container body 1. That is, when the lid is opened, the tip opening edge 67 is
Most preferably, it is located in the space above the opening of the container 3, and at least in the space above the opening of the shoulder member 13, so that the water accumulated in the steam passage 57 passes through the drain passage 66 and reaches the edge of the opening at the tip. It is sufficient that the water droplets are in a position where they can return to the container 3 without spilling outside the water heater when dripping from the water heater 67.

Further, an upper thermistor 6 is provided on the shoulder member 13.
8, the upper thermistor 68 is inserted through the outer circumferential wall 13b and the inner circumferential wall 13a of the shoulder member 13, and the tip detection portion of the upper thermistor is made to protrude inside the tip opening edge 67 of the drain passage 66. It is being The base of the upper thermistor 68 is held by a cover member 69, and by fitting the cover member 69 to the shoulder member 13, the base of the upper thermistor 68 is held between the outer peripheral wall 13b and the cover member 69. are doing.

Furthermore, a valve body receiving material 33a is incorporated in the water stop valve chamber 64 of the steam path 57, and the valve body receiving material 3
A valve body 32a formed into a block shape from a heavy material such as stainless steel is inserted into the valve body 3a. That is,
The set of component parts of the valve body receiving material 33a and the valve body 32a are the same as the set of component parts of the valve body receiving material 33 and the valve body 32 provided in the pumping channel 27 described above. It is used. Therefore, the valve body 32
A narrow passage is formed by radial ribs 34a between the outer periphery of the valve body holder 33a and the outer periphery of the valve body holder 33a.
The air enters from the lower inlet port of the air pocket a, passes through the valve chamber 64 through the narrow passage formed by the rib 34a, and is discharged from the outside air port 58. When the air pocket falls over, the valve element 32a moves inside the valve element receiving member 33a. By moving the cylindrical boss portion 58a to close the tip opening of the cylindrical boss portion 58a, a large amount of hot water in the container 3 is prevented from leaking out from the outside air port 58 via the steam path 57.

In addition, in the illustrated embodiment, the liquid level display cylinder 2
A water amount detection section 70 is provided at a position corresponding to liquid amount shortage 8. The water amount detection unit 70 includes a pair of electrodes 70 that sandwich the liquid amount display cylinder 28 from the outer circumferential side.
The electrodes 70a and 70b are electrically insulated, and the outer circumferences of the insulated electrodes 70a and 70b are covered and surrounded by a cylindrical shield.

A pocket portion 71 is formed by recessing the outer surface of the beak portion 15. Although not shown, the pocket portion 71 includes a boiling and heat retention indicator light made of a light emitting diode, and a light emitting diode as well. It is equipped with a water shortage and timer operation indicator light, a boiling command switch, and a timer set switch. These indicator lights and switches are installed in advance on an insulating substrate, and this substrate is inserted into the pocket portion 71.

[Effect of the embodiment]

Next, the operation based on the above embodiment will be explained.

While the water in the container 3 is being boiled, water is not poured into the container 3, so the air pump 40 is not operated. When the pump is not in operation, the pump return member 46 extends and pushes up the actuating member 41, as shown in the first diagram, and the valve cylinder 4 is locked by the locking portion 47.
3 is raised, and the switching valve 45 closes the exhaust port 44 of the air pump. Therefore, the air supply port 5
The boiling steam that entered the air supply path 55 from the exhaust port 4
4 will not enter the air pump 40. In this state, the switching valve 45 opens the port 60 of the branch passage 61 to open the air supply passage 55 and the steam passage 57, so that the boiling steam entering the air supply passage 55 passes through the steam passage 57 to the outside air. It is discharged from the port 58 to the outside air. Therefore, the pressure generated when the water in the container 3 boils is suitably reduced by the path from the air supply port 55 to the outside air port 58 via the steam path 57. At this time, since the drain path 66 has a closed end opening edge 67, steam will not scatter from the drain path 66 to the area around the shoulder member 13 and wet it.

When hot water in the container 3 is boiled by the submersible heater 8, the boiling temperature of the hot water in the container 3 is detected by the lower thermistor 10, the temperature of the boiled steam is detected by the upper thermistor 68, and both thermistors 10, 68 Since the triax 23 is activated to control the heating of the submersible heater 8 only when an abnormal temperature is detected, the temperature of the hot water in the container 3 can always be maintained at a constant temperature. In addition, the underwater heater 8 has a power output of approximately 500W when fully heated.
It has an output of approximately 18W during thermal insulation heating,
When keeping warm after boiling, the hot water is suitably kept warm together with the vacuum double container structure of the inner and outer containers 3a and 3b.

On the other hand, while the hot water in the container 3 is kept at a predetermined temperature after boiling, the hot water can be poured by the air pump 40. That is, the air pump 40
When air is pumped into the container 3 by operating the
The water is poured out from the water inlet 26 through the water inlet. The air pump 40 is operated by pushing the operating button 49 into the open cylindrical portion 48 of the head 38. Therefore, when operating this air pump, the operation button 4 is pressed.
9 is lowered against the button return member 53, the operating member 41 is simultaneously lowered against the pump return member 46, compressing the air pump 40. At this time, the intake valve 54 is connected to the intake opening 41 of the actuating member 41.
On the other hand, the valve cylinder 43 is lowered via the button return member 53, and the switching valve 45 closes the exhaust port 44.
is opened, and the port 60 of the branch path 61 is closed. Therefore, the air discharged from the exhaust port 44 due to the compression of the air pump 40 does not enter the steam path 57 and leak, and is preferably fed into the container 3 from the air supply port 56 via the air supply path 55. be pumped.
Note that when repeatedly operating the air pump 26, the operating button 49 is released from the pushing force and the operating button 49 is pressed.
9 by the button return member 53 and the air pump 40 by the pump return member 46, the intake valve 54 unblocks the intake opening 41a, so outside air flows into the air pump 40 through the clearance between each member. sucked inside.

By the way, by pouring out hot water, container 3
If the water inside the water boiler is completely consumed up to the opening water level of the water outlet 6, if the submersible heater 8 is accidentally heated, so-called dry cooking may occur, which may cause damage to the water heater or a fire. As in the above embodiment, the retention part 7 that constantly retains water in the container 3
If the submersible heater 8 is arranged in the retention section 7, heat is removed from the submersible heater 8 by at least the retained water, so the above-mentioned dry cooking accident can be prevented.

[Effect of idea]

According to the present invention, a steam path is formed in the lid body, and a drain path is formed branching from the steam path, and while the drain path is automatically closed when the lid is closed, it is opened when replenishing hot water, etc. When the lid is closed, the drain path is automatically opened, thereby allowing water accumulated in the steam path to return to the inside of the container. Furthermore, since the thermistor can be placed in the steam path via this drain path, the boiling temperature of the hot water in the container can be accurately detected and the temperature of the hot water can be suitably controlled.

In particular, according to the present invention, the elastic cylinder functions as a constituent member of the drain passage 66 and also serves as a component of the steam pipe 66.
3 to the lid main body 2 (erected wall 37a). Therefore, in addition to the desired drain effect as described above, this elastic cylinder has a holding function of elastically connecting and holding the steam pipe 63 to the lid body 2, so that the steam pipe 6
This has the effect of killing two birds with one stone by making it possible to elastically hold 3 without wobbling.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing the upper half of an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view showing the lower half of the same. 1... Container body, 2... Lid body, 3... Container,
3a... Inner container, 3b... Outer container, 7... Retention part, 8... Submersible heater, 10... Lower thermistor, 13... Shoulder member, 14... Pivotal part, 27...
Pumping channel, 30, 64... Valve chamber, 32, 32a...
Valve body, 33, 33a... Valve body receiving member, 37a...
Inner peripheral wall, 57...Steam path, 66...Drain path, 6
7... Tip opening edge, 68... Upper thermistor.

Claims (1)

[Scope of utility model registration request] 1 A container main body 1 equipped with an electric heater 8, a shoulder member 13 provided on the upper part of the container main body 1, and a lid main body 2 that is pivotally supported 14 on the shoulder member at the back and can be opened and closed. In a water heater comprising: a water injection channel extending from the bottom of the container body 1 to the water injection port 13 via a pumping channel 27; and a valve chamber 30 having a valve body 32 for shutting off water is interposed in the water injection channel. : The lid body 2 forms a steam path 57 including a steam pipe 63 that communicates the inside of the container body 1 with the outside air when the lid is closed, and a drain path 66 that branches from the steam path and is guided to the back of the lid body. The drain passage 66 is formed in a cylindrical shape from an elastic material such as rubber, and is formed in a cylindrical shape when the lid body 2 is opened.
The inner circumferential wall 13 of the shoulder member 13 opens downward to the upper space of the container body 1 and when the lid is closed.
A thermistor 68 for controlling the heater 8 is positioned opposite to the inside of the drain passage 66 when the lid body 2 is closed. The steam pipe 63 is provided on the shoulder member 13 so as to
An elastic cylindrical body that extends along the inside of the upright wall 37a that stands up from the base 37 of the lid main body 2 and constitutes the drain passage 66 is inserted through the upright wall 37a, and the elastic cylindrical body connects the steam pipe 63 and the upright wall. 3
A steam venting device for a water heater, characterized in that: 7a are elastically connected and held together.