JP2002306323A - Electric rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric rice cooker which can effectively suppress boiling overflow without influencing on the lid unit structure such as enlarging a pressure control part and has a compact and well-designed control part. SOLUTION: This electric rice cooker comprises a main body with an inner pot which can be put into/out from the main body and a lid body which opens/ closes the opening part of the main body. The lid body is integrally equipped with a steam discharging port to discharge steam in the inner pot outside and a pressure control unit is detachably equipped on the steam discharging port. The pressure control unit is constituted of a steam guide passage communicated with the steam discharging port to guide the steam upward from the steam discharging port, a steam discharging space equipped covering the steam guide passage, an Oneba (viscous stuff) returning passage to communicate the steam discharging space with the steam discharging port, and a check valve packing corresponding to the lower opening part of the Oneba returning passage to close the lower opening part of the Oneba returning passage against a Oneba counterflow direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker, and more particularly, to a structure of a pressure adjusting unit provided in a lid unit of the electric rice cooker.

[0002]

2. Description of the Related Art In general, an electric rice cooker includes a rice cooker main body for accommodating an inner pot (rice cooker) so as to be freely taken in and out, and a lid unit for opening and closing an opening of the rice cooker main body. Put rice and water in the inner pot stored in the rice cooker body,
When the lid unit is closed, the rice cooker is efficiently heated by desired heating means such as a heater and a work coil, so that the rice is cooked deliciously.

By the way, in the case of such an electric rice cooker,
Needless to say, a large amount of water vapor is generated in the inner pot during rice cooking, and this water vapor is discharged to the outside through a vapor discharge passage provided in the lid unit. At this time, a pressure regulation function is provided so that a large flow resistance is generated in the steam discharge passage, and when the rice and water in the inner pot are in a boiling state, the internal pressure is maintained slightly higher. However, it is a trick to cook delicious rice.

[0004]

However, during cooking, especially during the cooking process, a large amount of high-viscosity liquid, generally referred to as slime, is generated in the inner pot. Since the water is discharged to the outside through the vapor passage together with the water vapor, so-called spillover is likely to occur.

[0005] This cooking spill may occur, for example, when the amount of water is larger than a fixed amount, or when the amount of rice is smaller than the amount of water, or when a small amount of rice is cooked, the microcomputer erroneously determines the number of cooked rice, and It occurs when cooking with high power. In order to prevent such spillage of the slime, there has been a problem that the heating power must be set in consideration of the margin (suppressing the electric power at the time of cooking) and the heating power cannot be sufficiently increased.

Conventionally, in order to prevent such a spill,
There is a configuration in which the pressure regulating portion having a vapor release space for separating the viscosity of the steam discharge passage is extremely large to form a sufficient volume of the pressure retaining portion. The design restrictions on the structure of the lid unit itself increase, such as the inability to secure an effective heat insulating area in the unit, which causes a problem in heat insulation performance and is not preferable in terms of design. Also, in this case, since the viscous material remaining in the vapor discharge space is returned to the inner pan by using the above-mentioned vapor discharge passage, complete separation of the viscous material and the vapor is not possible, and there is a risk of backflow. Was also a concern.

The present invention has been made to solve such a problem, and by improving the viscosity separation / recovery performance of the pressure control unit, it is possible to increase the size of the pressure control unit without increasing the size of the pressure control unit.
We made it possible to effectively control spills,
It is an object of the present invention to provide a small and compact electric rice cooker having a pressure regulating unit which is excellent in design.

[0008]

Means for Solving the Problems In order to achieve the above object, the present invention is provided with the following means for solving the problems.

(1) An electric rice cooker according to a first aspect of the present invention comprises a rice cooker main body for accommodating an inner pot so that it can be freely taken in and out, and a lid for opening and closing an opening of the rice cooker main body. In the electric rice cooker, the body is provided with a steam outlet for discharging the steam in the inner pot to the outside integrally with the lid, and a pressure regulating unit is provided detachably with respect to the steam outlet. A steam guide passage communicating with the steam outlet and guiding the steam from the steam outlet upward, a steam discharge space provided to cover the steam guide passage, A stiffening return passage on the outer periphery of the passage that communicates the steam discharge space with the steam outlet, and corresponds to a lower opening of the stiffness returning passage;
A check valve packing for closing a lower opening of the viscous return passage in a viscous reverse flow direction.

As described above, in the configuration of the electric rice cooker according to the present invention, first, the pressure regulating unit communicates with the steam outlet on the lid unit side and guides upward while regulating the steam from the steam outlet. A steam guide passage, a steam discharge space covering the steam guide passage, and a viscosity return passage on the outer periphery of the steam guide passage for communicating the steam discharge space with the steam outlet. From the steam outlet on the unit side, the steam in the inner pot is discharged to the outside through the steam guide passage on the pressure regulating unit side and the steam discharge space above it while being appropriately regulated.

At this time, the viscous component is separated from the steam in the vapor discharge space, and the separated viscous component is passed through the viscous return passage separate from the vapor discharge passage. It is returned to the inner pot from the outlet.

Therefore, in this configuration, the viscous component is efficiently separated from the vapor containing the viscous component discharged from the inner pot 3, and the separated viscous component is not connected to the steam discharge passage. Through another passage dedicated to revisiting, the original steam discharge passage can be smoothly recovered without affecting the steam discharge and pressure regulation. for that reason,
It is possible to more effectively eliminate spills and to cook more delicious rice by maintaining proper pressure regulation performance.

[0013] By the way, this sticky component is generated in a particularly large amount at the time of cooking in the rice cooking step, and the amount of steam containing them is also increased. As the cooking is completed, both the viscous component and the steam amount gradually decrease.

Therefore, in the case of the conventional pressure regulating unit which also uses the steam discharge passage for collecting the viscosity, the steam discharge space of the pressure regulating unit does not cause spillage corresponding to the maximum steam generation amount. It must be formed just large enough.

However, in the case of the present invention, the lower opening of the sticky return passage is further provided in the lower opening of the steam guide passage in accordance with the steam pressure from the inner pot acting on the steam outlet. A check valve packing that closes only in the reverse flow direction is provided, so that the viscous material separated in the vapor discharge space can be almost always recovered to the inner pot side.

Therefore, it is not necessary to increase the size of the pressure regulating unit itself, and the pressure regulating unit needs to be small and compact, and the elements that restrict the structure of the lid unit itself are small.

(2) Invention of Claim 2 In the electric rice cooker of this invention, in the constitution of the invention of Claim 1, the packing portion of the check valve packing has flexibility, and It is characterized in that it is possible to always return the viscosity into the inner pot by bending in the direction of returning the viscosity by weight.

Therefore, according to this structure, for example, when the steam pressure in the inner pan becomes high, the packing portion closes the viscosity return passage by the pressure to prevent the viscosity of the viscosity from flowing back to the steam discharge space side. When the steam pressure in the inner pan falls, the packing part flexes downward due to the weight of the glue and the glue flows down,
It is surely returned to the inner pot.

(3) The third aspect of the present invention is an electric rice cooker according to the first or second aspect of the present invention, wherein the steam from the steam guide passage is provided in the steam discharge space in the steam discharge direction. And a detour that separates the viscous component downward during the detour is formed.

Therefore, in this configuration, the steam containing the viscous component supplied from the steam guide passage to the steam discharge space is directed to the steam discharge direction while being diverted through the above-mentioned detour, and suddenly to the outside. And the viscous component is effectively separated downward in the detour.

(4) An electric rice cooker according to a fourth aspect of the present invention, in the electric rice cooker according to the third aspect, wherein the bypass is directed downward from the back surface of the pressure regulating cap covering the upper portion of the steam discharge space. It is characterized by being formed by a cylindrical wall extended.

Therefore, in this configuration, the steam containing the viscous component discharged from the steam guide passage into the steam discharge space is formed in the circumferential direction by the bypass formed by the cylindrical wall extending below the back surface of the pressure regulating cap. The viscous component is efficiently separated while moving up and down.

[0023]

As described above, according to the electric rice cooker of the present invention, it is possible to effectively suppress spills without affecting the structure of the lid unit, for example, by increasing the size of the pressure adjusting unit. Thus, it is possible to provide an electric rice cooker provided with a pressure regulating unit which is excellent in design.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows the configuration and operation of an electric rice cooker according to Embodiment 1 of the present invention including a pressure adjusting unit.

(Characteristics of the present embodiment) First, in the electric rice cooker of the present embodiment, for example, an inner pot made of a magnetic metal plate capable of electromagnetic induction is employed as an inner pot, while a heating means for cooking rice is used. Two sets of work coils are provided so as to surround the entire inner bottom wall of the inner pan via the inner case made of a synthetic resin so as to surround the entire inner bottom pan of the inner pan. In addition, a heat retention heater is provided as a heating means at the time of heat retention so as to cover the entire periphery of the side wall of the inner pan. And thereby, it is possible to realize an appropriate rice cooking and heat retaining function.

On the other hand, the lid unit of the rice cooker body is provided with a pressure regulating means provided with a steam discharge space, a steam guide passage, a sticky return passage, a sticky check valve, and the like. At the time of raising, etc., it is designed to prevent the leakage of mucus and the like as effectively as possible.

(Structure of Rice Cooker Body) That is, as shown in FIG. 1, for example, the electric rice cooker is made of a magnetic metal plate such as a stainless steel plate capable of generating heat by eddy current induced therein. Pot (rice cooker) 3, an inner case (protection frame) 4 having a bottom and made of synthetic resin and formed so that the inner pot 3 can be set arbitrarily, and an outer casing holding the inner case 4 And a cylindrical outer case 1 having a bottom
And a lid unit 2 which can be opened and closed at the upper part of the rice cooker body formed integrally with the inner case 4.

Below the bottom wall (bottom) 4b of the inner case 4
A coil stand 7 is provided on one side, and the upper part of FIG.
As shown, a ferrite core (not shown)
Corresponds to both the central and side positions of the bottom wall 3a of the pan 3
Small pitch so that the litz wires touch each other
Sets (plurality) of work coils wound concentrically with
C ₁, C_TwoWith a certain distance between them,
Provided so as to wrap the entire bottom wall 3a of the inner pan 3
When current is applied, an eddy current is induced in the inner pot 3,
The whole is heated substantially uniformly. Soshi
And the work coil C ₁, C_TwoAre connected in series with each other, for example.
One end of which is connected through a rectifier circuit and a smoothing circuit.
Power line and the other end is IGBT (power transistor)
Are connected to the respective collectors.

Further, the work coil C ₂ above the inner case side wall 4b, at the time of thermal insulation and heat retention heater H ₁ is provided which serves as a heating means, all of the side wall portion 3b of the inner bowl 3 at the time of insulation The circumference is effectively and uniformly heated. The insulation heater H ₁ is constituted by, for example, code heater.

The outer case 1 includes a vertically-covered cylindrical cover member 1a made of, for example, a synthetic resin material, a synthetic resin shoulder member 5 coupled to an upper end of the cover member 1a, A bottom member 1b made of synthetic resin integrated with a lower end of the cover member 1a, and having a predetermined size of heat insulation and ventilation space formed with the bottom wall 4a of the inner case 4. As a cylindrical body with a bottom.

Further, a center sensor storage space (center sensor fitting hole) 10 penetrating vertically and concentrically is formed in the center of the coil stand 7 below the inner case 4. The coil spring 11 can be moved up and down in the center sensor storage space 10 vertically.
A center sensor 8 having an inner pot temperature detection sensor 8a and an inner pot detection switch 8b is provided in a state where the center sensor 8 is upwardly biased.

Reference numeral H ₂ denotes a side wall (side) 4 of the inner case 4 corresponding to an upper edge of the side wall (side) 3 b of the inner pot 3.
b is a shoulder heater provided on the outer periphery of the upper edge portion of the inner side of the shoulder member 5 via the flange portion 5a, and effectively heats the upper edge of the side wall portion 3b of the inner pan 3 during the heat insulation. By also heating the heat radiating plate 24 via the outer peripheral edge 24d, the condensed liquid droplets generated on the lower surface of the heat radiating plate 24 are quickly evaporated, thereby preventing white bokeh of the rice.

(Configuration of Lid Unit) On the other hand, reference numeral 2 denotes a lid unit. The lid unit 2 has an outer cover 21 made of a synthetic resin forming an outer peripheral surface thereof and an inner peripheral edge portion of the outer cover 21. A protruding inner frame portion 22, a metal inner cover 23 superposed and fixed to a lower portion of the inner frame portion 22, and an upper end side opening edge of the inner pan 3 provided below the inner cover 23; The inside is formed as a hollow heat insulating structure by a metal heat radiating plate 24 provided with a poly cover packing 14 at an engaging portion 24a. Further, the inner cover 23 is formed as a vacuum heat insulating structure by integrating two upper and lower metal plates 23a and 23b so as to face a closed sectional structure.

The lid unit 2 is rotatably attached to the shoulder member 5 on the upper part of the outer case 1 via a hinge mechanism 12 and a hinge cover 26. 2 is provided with a lock and lock release mechanism 13 which engages with a predetermined position to open and close the lid unit 2 in the vertical direction.

As shown in the figure, the pressure in the inner pot 3 is appropriately adjusted in accordance with the rice cooking process while releasing the steam to the outside at the substantially central portion of the lid unit 2, and the steam for separating the slime is separated. A steam provided with a pressure adjusting unit 32 capable of surely recovering the viscous liquid by connecting the bottom of the discharge space to the inner pot side through a viscous-returning path different from the original vapor discharging path. A discharge device 30 is provided.

(Structure of the steam discharging device) As shown in detail in FIGS. 2 and 3, for example, the steam discharging device 30 includes a steam pipe portion 31 on the lid unit 2 side and an opening of the steam pipe portion 31. The pressure adjusting unit 32 is detachably attached to the pressure adjusting unit 32. Steam pipe section 31
Is a cylindrical portion formed at the center of the front bottom portion in a pressure regulating unit installation recessed portion 21a formed at the center of the outer cover 21 of the lid unit 2 and having a front part formed as a circular section and a rear part formed in an elliptical shape. A large-diameter upper end side fitting portion 33a is screwed and fixed to the outer peripheral surface of the opening 27, and is fitted to the outer periphery of the steam pipe main body 33. A tubular inner cover locking member 34 that locks the hook-shaped inner peripheral edge 23c of the inner cover 23 between the upper end 33a of the main body 33 and a vertically open upper end, and the heat sink 24 is attached to the lower end. And an inner pipe 36 that is detachably engaged with the inside of the steam pipe main body 33 from below through a cylindrical engagement packing 35 fitted to the outer periphery.

The upper end portion 33 of the steam pipe body 33
An O-ring fitting groove 33b is formed on the outer periphery of the vertical wall portion a, and the O-ring 37 is fitted into the O-ring fitting groove 33b. And thereby, the inner cover 23
And the outer cover 21 are sealed in a liquid-tight manner.

The steam pipe main body 33 has a cylindrical wall portion 33c extending downward substantially continuously from the cylindrical opening portion 27 of the outer cover 21 to have substantially the same diameter. It is provided with a joint rib 33d.

On the other hand, the inner pipe 36 has a cylindrical wall portion 36a extending upward with an outer diameter capable of fitting into the rib 33d of the steam pipe main body 33, and has an elastic deformation made of silicon rubber or the like on its outer peripheral surface. A possible cylindrical engagement packing 35 is fitted tightly, and the rib 33 is provided between upper and lower ribs 35a and 35b provided on the outer peripheral surface of the engagement packing 35.
By being engaged and pressed against d, they are detachably supported in the up-down direction with a liquid-tight seal between them.

A flange 36b for attaching a heat sink is provided on the outer periphery of the lower end of the inner pipe 36.
The central portion of the heat radiating plate 24 is integrally attached through the fin 8. At the center of the heat radiating plate 24, an inner portion of the flange portion 36b is slightly recessed to form a concave groove portion 24b for revisiting, and a plurality of steam outlet holes (and viscous holes) are formed at the bottom thereof. .. Are formed.

As described above, first, on the side of the lid unit 2, the steam of the heat radiation plate 24 is provided inside the cylindrical opening 27 of the outer cover 21, the steam pipe main body 33 and the inner pipe 36. Outlet holes 24c, 24c
, And a steam discharge port 39A that is open to the outside through the cylindrical opening 27 of the outer cover 21 is formed.

On the other hand, the pressure adjusting unit 32 is connected to the lid unit via a cylindrical elastic packing 40 made of a heat-resistant rubber material (silicon rubber) fitted and fixed to the outer periphery of the lower cylindrical opening 41a. A pressure-adjusting case main body 41 having a large opening diameter on the upper surface side, which is removably fitted and fixed in the second cylindrical opening 27 from the upper side;
A hollow-structured steam guide pipe 43 extending upwardly from the bottom 41 e by a predetermined height and opening upward and downward, and a lower opening 43 a of the steam guide pipe 43. The cylindrical portion 44a is freely fitted and supported so as to be movable up and down via an engaging projection 44c, and a flange-shaped flexible packing portion (valve portion) 44 is provided on the outer periphery at the lower end side.
b, a hollow check valve packing 44 of a hollow structure made of a heat-resistant rubber material (silicon rubber) having a hat-shaped cross section and a lower opening 43 of the steam guide pipe 43
a of the pressure regulating case body 41 located on the outer peripheral side of
1e and the outer periphery of the steam guide pipe 43 in the pressure regulating case main body 41 in a state of communicating with the revisit holes 42, 42,. The provided viscosity return passage 39C and the pressure regulating case main body 4
1 and the lower peripheral wall 4
5b, which is helicoidally engaged with the pressure guide cap 45 and forms a steam discharge space 50 vertically shallow and radially wide to cover the upper opening 43b of the steam guide pipe 43, Arc-shaped cylindrical walls 45 c, 45 c extending downward by a predetermined length and located at the left and right portions on the back side of the top plate portion 45 a of the cap 45;
Steam outlets 45e, 45e provided in the top plate portion 45a
...

With this configuration, the check valve packing 44 is connected to the steam discharge port 39A on the lid unit 2 side.
An inner passage, a steam guide passage 39B composed of the steam guide pipe 43, and a steam discharge space 50 formed between the pressure regulation cap 46 and the pressure regulation case body 41, which is shallow in the vertical direction and wide in the radial direction, and is indicated by a chain line arrow. From bottom to top, like
A steam discharge port provided in the top plate portion 45a from below the pressure regulating cap 45 while taking sufficient time from above to radially outward, from radial direction to circumferential direction, from circumferential direction to downward, and from below to upward. A steam discharge path having a bypass structure communicating with 45e is formed.

Two sets of left and right arc-shaped cylindrical walls 45c, 45c on the back side of the top plate portion 45a of the pressure regulating cap 45 are positioned on both left and right sides to allow the radially wide steam discharge space 50 to extend in the radial direction. Divided into two chambers, an upstream side 50a and a downstream side 50b, as shown in FIGS.
Once received on the upstream side 50a, separated and flowed along the peripheral surface in both front and rear directions, and a gap (slit) between the front and rear cylindrical walls 45c, 45c.
45d, the viscous Y is effectively separated downward by flowing out from the 45d portion, and the downstream side 50
b, only the steam X is supplied to the upper steam outlets 45e, 45e,.
It is formed in a viscous separation / holding space that discharges as indicated by an arrow toward.

On the other hand, the bottom of the steam discharge space 50 functioning as the viscous separation / holding space is also connected via a viscous return passage 39C formed between the vapor guide pipe 43 and the pressure regulating case main body 41. The pressure regulating case body 41 which is opened and closed by the packing portion 44b of the check valve packing 44
Are connected to the resiliency holes 42, 42,... On the outer periphery of the bottom 41e. .. At the lower end of the revisiting passage 39C have a low steam pressure in the inner pan 3,
When the check valve packing 44 is lowered by a predetermined dimension as shown in the figure, the flange-shaped packing portion 44b
And a bottom portion 41e of the pressure regulating case main body 41 through a gap that also expands by its own weight.
, The separated viscous,
It is collected in the steam discharge port 39A through the viscous return passage 39C as shown by a chain line arrow Y, and
4 Steam outlet holes 24c, 24c of central groove 24b
-It is surely returned to the inner pot 3 via.

Accordingly, in this configuration, the viscous component Y is efficiently separated from the steam (X + Y) containing the viscous component discharged from the inner pot 3, and the separated viscous component Y Through a viscous return passage 39C different from the steam guide passage 39B, which is a steam discharge passage, the steam can be recovered almost always smoothly without affecting the discharge and pressure regulation of the original steam discharge passage. become. For this reason, it is possible to more effectively eliminate spills and to cook more delicious rice by maintaining proper pressure regulation performance.

[0047] As a result, the efficiency of collecting the viscous material increases. Therefore, there is no need to fixably increase the size of the pressure adjustment unit 32 itself, and the pressure adjustment unit 32
It is sufficient that the top surface of the lid unit 2 is as small and compact as possible so that the upper surface of the lid unit 2 can be viewed as a flash surface as much as possible, and the elements that restrict the structure of the lid unit 2 itself are small.

The pressure regulating case body 41 is provided with a handle 41d at one end on the rear side of the cylindrical outer peripheral edge 41c as shown in the figure, and the pressure regulating unit 32 itself is connected to the lid unit 2. This facilitates removal from the opening, and facilitates turning operation when the helicoid coupling between the pressure regulating case main body 41 and the pressure regulating cap 45 is released.

(Embodiment 2) Next, FIG. 4 shows a configuration of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 2 of the present invention.

In this embodiment, a surrounding wall 41f of a considerable height surrounding the pressure regulating cap 45 is provided on the outer periphery of the pressure regulating case main body 41, and the vapor discharge ports 45e, 4
Top plate 4 of pressure regulating cap 45 spilled from 5e ...
It is characterized in that the viscous component on 5a is collected from a gap portion around the outside of the pressure regulating cap 45, and is returned to the above-mentioned vapor discharge space 50 via a recovery port 47 formed on the bottom side.

By adding such a configuration, the upper surface of the lid unit 2 can be more reliably cleaned.

(Embodiment 3) Next, FIG. 5 shows a configuration of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 3 of the present invention.

In this embodiment, while opening the center of the heat radiating plate 24 of the lid unit 2 of the first embodiment,
A pressure regulating unit 32 having substantially the same configuration and operation as the pressure regulating unit 32 described above is provided with a cylindrical vapor discharge port 45e at the center of the top plate 45a of the pressure regulating cap 45, and an outer periphery at the upper end thereof. Is formed on the inside of the lid unit 2 by forming an engaging projection 45f on the inner wall 36 of the lid unit 2 side through a fitting rib 36c provided on the inner pipe 36 so as to engage with the steam discharge port 39A. The pressure adjusting unit 32 can be provided in the apparatus.

In this case, the upper part of the steam guide pipe 43 forming the steam guide passage 39B is connected to the steam discharge port 45e.
On the other hand, the upper end face is closed, and openings 43b, 43b are formed on the side wall 43c side to form a side blow, so that the steam containing the viscous component is formed at the steam discharge port 45e. By hitting the inner peripheral wall of the cylindrical part, the separation performance of steam and viscous material is further improved. Other operations are the same as those of the first and second embodiments, and it is possible to effectively prevent the spill.

According to such a configuration, it is sufficient to form only a small steam blow grill on the upper surface of the lid unit 2, and there is almost no structural restriction on the lid unit 2 itself, and the design is not so. The degree of freedom increases.

(Embodiment 4) Next, FIG. 6 shows a configuration of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 4 of the present invention.

In this embodiment, in the same configuration as the pressure regulating cap 45 of the first embodiment described above, a lower portion having a large diameter is first placed inside an inner pipe 36 for attaching a heat sink located at a lower portion thereof. A steam guide pipe 53 having a small diameter at an upper portion is provided by integral molding, and a cylindrical portion 53a of the steam guide pipe 53 is provided.
Is a first steam guide passage member, and a cylindrical portion 54a of a check valve packing 54 located above the first steam guide passage member is largely extended upward to be a second steam guide passage member. The two first and second mutually continuous steam guide passages 39B ₁ and 39B _{2 formed} by the slab-shaped members allow the pressure in the inner pan 3 to be more effectively released while effectively releasing the pressure in the inner pan 3. The first and second cylindrical walls 51a and 51b having different radial positions, and the cylindrical wall 5 on the upper surface of the central portion of the inclined wall 41b of the lower pressure regulating case main body 41 corresponding thereto.
In the vapor discharge space 50 having a multistage two-stage up / down bent bypass, the viscous component is particularly effectively separated.

The separated viscous component Y is supplied from the viscous return passage 39C ₁ (first viscous return passage) similar to the above to the viscous return holes 42, 42,. 54
The resiliency return passage 39C formed between the inner pipe 36 and the steam guide pipe 53 via the packing portion 54b of
₂ (second viscous return passage), and further, viscous lead-out holes 36d, 3d at the bottom of the cylindrical wall 36a of the inner pipe 36.
6d... Are returned to the heat radiating plate 24, and when the internal pressure is reduced, the hole 24 provided in the outer peripheral portion of the inner pipe 36 of the heat radiating plate 24 is formed.
e, 24e... flow downward.

In the case of such a configuration, in addition to the operation of the first embodiment, the pressure regulation performance is further improved.

(Embodiment 5) Next, FIG. 7 shows a configuration of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 5 of the present invention.

In this embodiment, in the structure of the pressure regulating unit 32 of the fourth embodiment described above, a cylinder is further provided inside the steam guide pipe 53 in the inner pipe 36 forming the first steam guide passage. Slit member 55 is integrally provided, and the slit portion 55a of the cylindrical slit member 55,
55a... Is used to perform the viscous separation as the first stage, and then, while controlling the pressure, is finally sent to the vapor discharge space 50, thereby further improving the viscous separation performance. Features.

The other structure is the same as that of the fourth embodiment and has the same effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an entire configuration of an electric rice cooker according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view around a pressure regulating unit in a lid unit of the electric rice cooker.

FIG. 3 is a rear view of a pressure adjusting cap in the pressure adjusting unit of the electric rice cooker.

FIG. 4 is a cross-sectional view showing a structure of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 2 of the present invention.

FIG. 5 is a cross-sectional view showing a structure of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 3 of the present invention.

FIG. 6 is a cross-sectional view showing a structure of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 4 of the present invention.

FIG. 7 is a cross-sectional view showing a structure of a pressure adjusting unit in a lid unit of an electric rice cooker according to Embodiment 5 of the present invention.

[Explanation of symbols]

1 is an outer case, 2 is a lid unit, 27 is a cylindrical opening,
30 is a steam discharge device, 31 is a steam pipe section, 32 is a pressure regulating unit section, 33 is a steam pipe main body, 36 is an inner pipe,
39A is a steam outlet, 39B is a steam guide passage, 39B ₁
First steam guide channel, 39B ₂ and the second steam guide channel, 39C are control viscosity return passage, 39C ₁ first control viscosity return passage, 39C ₂ and the second control viscosity return passage, 41 tone Pressure case main body, 45 is a pressure regulating cap, 45e is a steam discharge port, 5
0 is a vapor discharge space.

Claims (4)

[Claims] 1. A rice cooker main body for storing an inner pot in a freely removable manner, and a lid for opening and closing an opening of the rice cooker main body.
An electric rice cooker, wherein the lid is provided with a steam outlet for discharging steam in the inner pot to the outside integrally with the lid, and a pressure regulating unit is provided detachably with respect to the steam outlet. A steam guide passage communicating with the steam outlet and guiding steam upward from the steam outlet, a steam discharge space provided over the steam guide passage, A viscous return passage on the outer periphery of the vapor guide passage for communicating the vapor discharge space with the vapor discharge port, and a lower opening of the viscous return passage corresponding to the lower opening of the viscous return passage; An electric rice cooker comprising a check valve packing which closes in a direction. 2. The packing portion of the check valve packing is flexible, and can be constantly returned to the inner pot by flexing in the direction of returning the viscosity by the weight of the viscosity. The electric rice cooker according to claim 1, wherein: 3. A detour path is formed in the vapor discharge space to divert the vapor from the vapor guide passage in the vapor discharge direction and to separate the viscous component downward during the detour. The electric rice cooker according to claim 1. 4. The electric rice cooker according to claim 3, wherein the bypass is formed by a cylindrical wall extending downward from the back surface of the pressure regulating cap covering the upper part of the steam discharge space. vessel.