JP3476745B2 - rice cooker - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker such as a rice cooker, and more particularly to a silencer for a steam passage.

[0002]

2. Description of the Related Art A steam passage is provided in a lid of a rice cooker in order to discharge steam generated in the rice cooker during rice cooking.
The steam is discharged to the outside from the steam hole at the end of the steam. When rice is cooked with such a rice cooker, the sound generated inside the rice cooker and the sound generated when steam passes through the steam passages and steam holes leak to the outside from the steam holes, It becomes noise accompanying.

In addition, a so-called "Nemba", which is a starch-like viscous substance, may enter the above-mentioned steam passage together with steam generated by cooking rice, and the "Nemba" may be ejected from the steam hole to the outside to be spilled. is there.

In order to capture and remove the above-mentioned bed in the steam passage in front of the steam holes, it is known to provide a bed removing device in which the steam passage is bent in a labyrinth shape (see, for example, Japanese Patent Laid-Open Publication No. Hei 10 (1999) -242242). 11-18930, JP-A-200
0-162).

[0005]

In the above-mentioned stripping apparatus, since the steam passage is complicatedly bent, the width of the passage changes in the middle of the steam passage, and there is a portion where the pressure reducing action occurs.
It seems that there is also a silencing effect that suppresses the noise accompanying the rice cooking.

However, in reality, the sound generated by the collision between the shavings trapped by the shavings removing device and the steam, the stirring action of the shavings by the steam, etc., is generated in the portion close to the steam holes, and therefore, to the outside. It will be leaked as noise, and no silencing effect can be expected.

Therefore, the present invention provides a rice cooker that includes a noise generated in a tongue removal device and is provided with a noise reduction device for suppressing and attenuating noise leaking to the outside from a steam hole, and capable of quiet rice cooking. It is an issue.

[0008]

In order to solve the above-mentioned problems, the present invention provides a rice cooker provided with a stick-removing device in the middle of a steam passage. We adopted a structure with a muffler installed in.

According to the above construction, it is possible to suppress and damp the noise that is generated in the rear (on the side of the rice cooker) including the tongue removing device.

As the above-mentioned muffler, it is possible to use a muffler provided with a narrowed portion and an enlarged portion of the steam passage, and the muffler can be detachably attached to the steam passage. .

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The steam passage 1 is provided in the lid of the rice cooker of the first embodiment shown in FIGS. The steam port 2 serving as an inlet of the steam passage 1 is provided above the rice cooking pot 3 on the lower surface of the lid. A steam hole 4 serving as an outlet of the steam passage 1 is provided on the upper surface of the lid.

Inside the steam passage 1, a pressure adjusting device 5 is installed near the steam port 2, and a spherical pressure adjusting ball 6 opens and closes a valve hole 7 to adjust the internal pressure of the rice cooking pot 3. It has become. A sticker removing device 8 is provided on the outlet side of the pressure regulating device 5, and a silencer 9 is provided between the sticky removing device 8 and the steam hole 4.

The tongue removing device 8 includes a cyclone chamber 10 provided in a part of the steam passage 1 and a cyclone cap 11
Composed of and. The cyclone chamber 10 is provided with a blow port 12 which is opened in the tangential direction on the inner peripheral wall thereof.

As shown in FIG. 2, the cyclone cap 1
The reference numeral 1 includes a closing plate 13 which is fitted on the upper surface of the cyclone chamber 10 to close the same, and an exhaust pipe 14 which penetrates the closing plate 13 and extends downward. On the upper surface of the blocking plate 13, an inlet cylinder 15 for the muffler 9 which is concentric with the exhaust cylinder 14 is integrally provided upward. The lower end of the exhaust pipe 14 is opened near the bottom of the cyclone chamber 10. Further, on the upper surface of the closing plate 13, a side guide cylinder 17 is provided on the side of the inlet cylinder 15.

By covering the cyclone chamber 10 with the cyclone cap 11, the above-mentioned strip removing device 8 is provided.
Are configured (see FIG. 1). In this stick removal device 8, when steam mixed with stick is blown from the blowing port 12, swirling occurs along the inner surface of the peripheral wall, and gas-liquid separation is performed by the cyclone action, so that stick and steam are separated. The separated vapor passes through the exhaust pipe 14 and the inlet pipe 15 and is blown out to the silencer 9.

As shown in FIG. 2, the muffler 9 is composed of the cyclone cap 11 and a steam muffler 18 covered on the closing plate 13 thereof. The steam muffler 18 has a cylindrical shape with an upper end closed, and a central guide cylinder 19 with an open lower end is provided at the center. Also, the central guide tube 1
A muffler exhaust pipe 22 having open upper and lower ends is provided on an upper end closed surface between the peripheral wall 9 and the peripheral wall 21. Peripheral wall 21 above
The lower end edge of is removably fitted to the outer peripheral edge of the closing plate 13. The center guide cylinder 19 is fitted to the outside of the inlet cylinder 15, and the muffler exhaust cylinder 22 is fitted to the inside of the side guide cylinder 17.

The space between the center guide cylinder 19 and the inlet cylinder 15 in the vertical direction, the space between them in the radial direction, and the center guide cylinder 1
The interval between the lower end of 9 and the upper surface of the closing plate 13 is formed to have a narrow cross-sectional area within a range that does not hinder the passage of steam, and serves as the first throttle portion 23 that reduces the steam passage. There is.

A wide space is formed between the outer peripheral surface of the central guide cylinder 19 and the inner peripheral surface of the peripheral wall 21, and this portion is the enlarged portion 24.
Has become. The first narrowed portion 23 is communicated with the enlarged portion 24 at the lower end portion of the central guide cylinder 19.

The distance between the upper end of the side guide cylinder 17 and the upper wall surface of the steam muffler 18, the distance between the side guide cylinder 17 and the muffler exhaust pipe 22 in the radial direction, the muffler exhaust pipe 2
The interval between the lower end of 2 and the upper surface of the closing plate 13 is formed to have a narrow cross-sectional area within a range that does not hinder the passage of steam, and serves as a second throttle portion 25 that reduces the steam passage. There is.

Vertical slits 26, 26 'provided in the upper half of the inlet tube 14, vertical slits 27 provided in the side guide tube 17, and the inlet tube 15 side are provided so as to be lower. The inclined surface of the closing plate 13 is for returning the bean, which has not been removed by the tongue removing device 8, into the muffling device 8 through the inlet tube 15 when the tongue enters the muffling device 9. Further, the slit 26 ′ provided in the exhaust pipe 14 is provided to secure a vapor passage even when a gush is accumulated in the cyclone chamber 10 and the lower end portion of the exhaust pipe 14 is closed. .

As shown in FIG. 2 (b), the lateral guide cylinder 17 and the muffler exhaust cylinder 22 have a magenta cross-sectional shape for the purpose of compensating for their insufficient cross-sectional areas. .

In addition, in FIG. 1, 28 is a lid hook,
Reference numeral 29 is a heat sink hook, and 30 is a display device.

The rice cooker of the first embodiment is constructed as described above, and its operation will be described below. When steam is generated from the inside of the rice cooker 3 as the rice cooking progresses and the pressure reaches a certain level or more and the valve hole 7 is opened, the steam is steamed as shown by an arrow in FIG. After that, it enters the removing device 8. In the stick removal device 8, the sticks are separated by the cyclone action described above. The sleeper stays in the cyclone chamber 10, and the steam enters the muffler 9 through the exhaust stack 14.

The steam that has entered the silencer 9 passes through the first throttle portion 23, enters the enlarged portion 24, further passes through the second throttle portion 25, passes through the muffler exhaust pipe 22 and the steam hole 4, and then exits to the outside. Is released.

Further, in the muffler 9, the sound generated inside the rice cooker and the sound generated by the pressure adjusting device 5, the bed removing device 8 and the like are emitted to the outside through the same route as the steam, but each throttle part Two
The noise level is lowered due to the pressure loss while passing through 3, 25 and the enlarged portion 24 on the way.

In order to confirm the silencing effect of the silencing device 9 described above, the results of an experiment conducted with the silencing device having the same structure as in the first embodiment are shown below.

[Experimental conditions] 3000 ml of water was put into an IH type rice jar cooked with 1.8 liters and boiled. The noise near the steam holes at this time was measured and compared between the conventional product not equipped with the silencer 9 and the product of the present invention equipped with the same.

[0028]

[Table 1]

As described above, the muffling device 9 needs to have at least one diaphragm portion 23 and at least one enlarged portion 24. Of course, you may provide in two or more places.

FIG. 3 shows a second embodiment of the silencer 9. In this case, the cap 32 of the oval case 31
Form a cover. As in the case described above, the case 31 may form part of the removal device 8 or may be provided independently. The inlet tube 15 'is formed in a short shape, and an elliptical lower guide tube 33 having a direction different from the elliptical direction of the case 31 by 90 degrees is provided around the inlet tube 15'. A similar elliptical upper guide cylinder 34 is provided at the center of the lower surface of the cap 32, and the upper guide cylinder 34 is fitted inside the lower guide cylinder 33 with a slight gap. The inlet tube 15 'is the first narrowed portion 23, and the inside of the upper guide tube 34 is the first enlarged portion 24.
a, the gap between the lower guide cylinder 33 and the upper guide cylinder 34 is the second narrowed portion 25, and the space between the outer peripheral surface of the lower guide cylinder 33 and the inner peripheral surface of the case 31 is the second enlarged portion 24b and the cap 32. The two muffler exhaust pipes 22 provided are the third throttle unit 2
5 '.

FIG. 4 shows a third embodiment. In this case, the case 31 has a quadrangular shape and has a short inlet cylinder 15 'and one lower partition wall 35. The cap 32 has the muffler exhaust pipe 22 and one upper partition wall 36. Also in this case, the inlet tube 15 ′ is the first throttle portion 23, the space above it is the first enlarged portion 24 a, and the gap between the lower partition wall 35 and the upper partition wall 36 is the second throttle portion 25 and the cap 3.
The space below the muffler exhaust pipe 22 provided in 2 is the second
The enlarged portion 24b of the muffler exhaust pipe 22 is the third throttle portion 2
5 '.

FIG. 5 shows a fourth embodiment. In this case, the case 31 is circular, and the lower partition wall 35 and the upper partition wall 36 are arc-shaped, which is the same as the third embodiment.

[0033]

As described above, according to the present invention, noise generated inside the rice cooker, including the bed remover, is suppressed and attenuated, so that the noise level emitted from the steam holes to the outside is reduced. It becomes low and you can cook rice quietly. Further, since the flow of steam undergoes pressure loss while passing through the muffler, the friction noise when passing through the steam holes is also reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rice jar lid portion of a first embodiment.

FIG. 2 (a) is a sectional view of the muffler of the above. (B) Sectional drawing of the bb line of (a) figure

FIG. 3A is a transverse plan view of the second embodiment. (B) Sectional drawing of the bb line of (a) figure

FIG. 4A is a cross-sectional plan view of the third embodiment. (B) Sectional drawing of the bb line of (a) figure

FIG. 5 (a) is a transverse plan view of the fourth embodiment. (B) Sectional drawing of the bb line of (a) figure

[Explanation of symbols]

1 steam passage 2 steam port 3 rice cooker 4 steam holes 5 Pressure regulator 6 pressure regulating balls 7 valve holes 8 Oneba removal equipment 9 silencer 10 cyclone room 11 cyclone cap 12 Blow mouth 13 Block 14 Exhaust stack 15,15 'inlet tube 17 Side guide tube 18 Steam muffler 19 Central guide tube 21 Perimeter wall 22 Muffler stack 23 First diaphragm 24 Expansion section 24a First enlarged portion 24b Second enlarged portion 25 Second diaphragm 25 'Third diaphragm 26, 26 'slit 27 slits 28 Lid hook 29 Heat sink hook 30 display

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-244137 (JP, A) JP-A-2000-162 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47J 27/00 103 A47J 36/38

Claims (3)

(57) [Claims] 1. A rice cooker comprising a steam removal device provided in the middle of a steam passage, wherein a silencer is provided between said steam removal device and the steam hole, and said silencer has an inlet tube and a muffler.
-Exhaust pipe is provided, and the exhaust pipe of the removal device is equipped with the inlet pipe.
It's concentric with the cylinder, and it's in the steam generated by cooking rice.
Is separated by the equipment for removing the shavings, and the steam from which the shavings have been removed
Reduce the noise level while passing through the silencer
Rice cooker characterized by doing so . 2. The above-mentioned brim removing device is tangential to the inner peripheral wall.
Cyclone room with a blow-out opening that opens in the direction
And is fitted on the upper surface of the cyclone chamber to close it
Block plate and the cyclone chamber below through the block plate
With a cyclone cap consisting of an exhaust stack that extends to
Made, it said silencer includes an inlet tube and the muffler exhaust pipe
The rice cooker according to claim 1, wherein a narrowed portion and an enlarged portion of the steam passage are provided between the rice cookers. 3. The rice cooker according to claim 1, wherein the silencer is detachably attached to the steam passage.