JP2001327400A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cook rice calmly by suppressing and damping noise generated as steam passes through in a steam passage provided in a lid of a rice cooker. SOLUTION: In a rice boiler provided with a sticky matter eliminating device 8 in the middle of a steam passage 1, a sound eliminating device 9 comprising a restricting part to restrict the steam passage and an enlarging part to enlarge it is provided between the sticky matter eliminating device 8 and a steam hole 4, so noise including noise generated by the sticky matter eliminating device 8 to be emitted outside is restricted and damped.

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 muffler in 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 during cooking in a rice cooker.
The steam is discharged to the outside from the steam hole at the end. When rice is cooked with such a rice cooker, the sound generated inside the rice cooker accompanying the rice cooking and the sound generated when steam passes through the steam passage or the steam hole leaks out from the steam hole to the outside, and the rice cooked. And noise.

[0003] In addition, a so-called starch, which is a starchy viscous material, enters the steam passage together with steam generated during rice cooking, and the steam spouts from the steam hole to the outside to form a spill. is there.

[0004] In order to catch and remove the above-mentioned ash in the steam passage before the steam hole, it is known to provide a sneeze removing device in which the steam passage is bent in a labyrinth shape (for example, Japanese Patent Application Laid-Open No. HEI 9-110572). 11-18930, JP200
No. 0-162).

[0005]

In the above-mentioned litter removing device, the steam passage is bent in a complicated manner, and the passage width changes in the middle of the passage, and there is a portion where a pressure reducing action occurs.
It seems that there is also a silencing effect for suppressing the noise associated with the rice cooking.

However, actually, the sound generated by the collision between the steam and the steam captured by the steam removing device and the stirring action of the steam by the steam is generated in a portion close to the steam hole, so that the noise is generated outside. The noise leaks out, and the noise reduction effect cannot be expected.

Therefore, the present invention provides a rice cooker that includes a silencer that suppresses and attenuates noise leaking from the steam holes to the outside, including a noise generated in the garbage removal device, and is capable of quietly cooking rice. Make it an issue.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a rice cooker provided with a sleep removing device in the middle of a steam passage. A configuration in which a silencer is provided is adopted.

[0009] According to the above configuration, it is possible to suppress and attenuate the noise generated at the rear (on the rice cooker side) of the apparatus including the litter removal device.

[0010] The above-mentioned silencer may be one provided with a narrowed portion and an enlarged portion of a steam passage, and may have a configuration in which the silencer is detachably attached to the steam passage. .

[0011]

Embodiments of the present invention will be described below with reference to the drawings. A steam passage 1 is provided in the lid of the rice cooker of the first embodiment shown in FIGS. A steam port 2 serving as an inlet of the steam passage 1 is provided on the lower surface of the lid so as to face above the rice cooker 3. Further, 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 regulating device 5 is incorporated near the steam port 2, and a valve hole 7 is opened and closed by a spherical pressure regulating ball 6 so as to regulate the internal pressure of the rice cooker 3. It has become. An oil removing device 8 is provided on the outlet side of the pressure regulating device 5, and a silencer 9 is provided between the oil removing device 8 and the steam hole 4.

The garbage removal device 8 includes a cyclone chamber 10 provided in a part of the steam passage 1 and a cyclone cap 11.
It is composed of The cyclone chamber 10 is provided with a blowing port 12 which is opened in a tangential direction on an inner peripheral wall thereof.

As shown in FIG. 2, the cyclone cap 1
1 includes a closing plate 13 fitted on the upper surface of the cyclone chamber 10 and closing the same, and an exhaust pipe 14 extending downward through the closing plate 13. On the upper surface of the closing plate 13, an inlet tube 15 for the muffler 9 which is concentric with the exhaust tube 14 is integrally provided upward. The lower end of the exhaust pipe 14 is opened near the bottom of the cyclone chamber 10. In addition, a side guide tube 17 is provided on the upper surface of the closing plate 13 beside the inlet tube 15.

By covering the cyclone chamber 10 with the cyclone cap 11, the above-mentioned waste removing device 8 is provided.
(See FIG. 1). In the rice removing device 8, when steam mixed with the rice is blown from the blowing port 12, a swirl occurs along the inner surface of the peripheral wall, and gas-liquid separation is performed by a cyclone action, thereby separating the rice and the steam. The separated steam passes through the exhaust pipe 14 and is blown out to the silencer 9 through the inlet pipe 15.

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

The vertical space between the central guide tube 19 and the inlet tube 15, the radial space between them, and the central guide tube 1
The gap between the lower end of 9 and the upper surface of the closing plate 13 is formed so as to have a narrow sectional area within a range that does not hinder the passage of steam, and serves as a first throttle portion 23 for reducing the passage of steam. I have.

A large 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 space is
It has become. The first throttle portion 23 communicates with the enlarged portion 24 at the lower end of the central guide tube 19.

Further, the distance between the upper end of the side guide tube 17 and the upper end wall surface of the steam muffler 18, the radial distance between the side guide tube 17 and the muffler exhaust tube 22, the muffler exhaust tube 2
The gap 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 impede the passage of steam, and serves as a second throttle portion 25 for reducing the passage of steam. I have.

The vertical slits 26 and 26 'provided in the upper half of the inlet tube 14 and the vertical slit 27 provided in the side guide tube 17 are provided so that the inlet tube 15 side is lowered. The inclined surface of the closing plate 13 is used to return the sludge not removed by the sludge removing device 8 to the sludge removing device 8 through the inlet tube 15 when the sludge enters the silencer 9. Further, the slit 26 ′ provided in the exhaust pipe 14 is provided to secure a steam passage even when the lower end portion of the exhaust pipe 14 is closed due to accumulation of the tongue in the cyclone chamber 10. .

As shown in FIG. 2 (b), the lateral guide cylinder 17 and the muffler exhaust cylinder 22 have a cross-sectional shape in the shape of a bevel, in order to make up for the lack of these sectional areas. .

In addition, in FIG. 1, 28 is a lid hook,
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 now be described. Steam is generated from the inside of the rice cooking pot 3 as the rice cooks, and when the pressure reaches a certain level or more and the valve hole 7 is opened, the steam is supplied to the steam port 2 and the pressure regulator 5 as shown by the arrow in FIG. After that, it enters the removing device 8. In the waste removing device 8, the waste is separated by the above-described cyclone action. The cattle stays in the cyclone chamber 10, and the steam enters the silencer 9 through the exhaust stack 14.

The steam that has entered the silencer 9 passes through the first throttle section 23 and enters the expansion section 24, further passes through the second throttle section 25, passes through the muffler exhaust pipe 22 and the steam hole 4, and then goes to the outside. Released.

The sound produced inside the rice cooker, the sound produced by the pressure regulator 5 and the rice removing device 8 is emitted to the outside through the same path as the steam. 2
The noise level is reduced due to a pressure loss during passage through 3, 25 and the enlarged portion 24 in the middle.

The results of an experiment conducted with a silencer having the same structure as in the first embodiment to confirm the silencing effect of the silencer 9 will be described below.

[Experimental Conditions] 3000 ml of water was put into a 1.8 liter IH type rice cooker and boiled. The noise near the steam hole at this time was measured and compared between a conventional product without the above-described silencer 9 and a 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 stop 23 and one enlargement 24. Of course, two or more locations may be provided.

FIG. 3 shows a second embodiment of the silencer 9. In this case, the cap 32 of the oval case 31
To form a shape. As in the case described above, the case 31 may be configured as a part of the ash removal device 8, or may be provided independently. The inlet tube 15 ′ is formed short, 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 tube 34 is provided at the center of the lower surface of the cap 32, and the upper guide tube 34 is fitted inside the lower guide tube 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 throttle portion 25, and the gap 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 24 b and the cap 32. The two muffler exhaust pipes 22 provided are provided in the third throttle section 2.
5 '.

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

FIG. 5 shows a fourth embodiment. The case 31 in this case is the same as the above-described third embodiment except that the case 31 is circular and the lower partition wall 35 and the upper partition wall 36 are arc-shaped.

[0033]

As described above, according to the present invention, the noise generated inside the rice cooker, including the litter removal device, is suppressed and attenuated, so that the noise level emitted from the steam hole to the outside is reduced. And you can cook rice quietly. Further, since the flow of the steam receives a pressure loss while passing through the muffler, a frictional noise when passing through the steam hole is also reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a rice cooker lid part according to a first embodiment.

FIG. 2A is a cross-sectional view of the muffler according to the first embodiment; FIG.

3A is a cross-sectional plan view of the second embodiment. FIG. 3B is a cross-sectional view taken along line bb in FIG.

4A is a cross-sectional plan view of the third embodiment. FIG. 4B is a cross-sectional view taken along line bb in FIG.

5A is a cross-sectional plan view of the fourth embodiment. FIG. 5B is a cross-sectional view taken along line bb in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steam passage 2 Steam port 3 Rice cooker 4 Steam hole 5 Pressure regulating device 6 Pressure regulating ball 7 Valve hole 8 Rust removing device 9 Silencer 10 Cyclone chamber 11 Cyclone cap 12 Blow-out port 13 Closure plate 14 Exhaust cylinder 15, 15 ' Inlet tube 17 Side guide tube 18 Steam muffler 19 Central guide tube 21 Peripheral wall 22 Muffler exhaust tube 23 First throttle section 24 Expanded section 24a First expanded section 24b Second expanded section 25 Second throttle section 25 ' No. 3 aperture part 26, 26 'Slit 27 Slit 28 Lid hook 29 Heat sink hook 30 Display device

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Nakagawa 1-20-5 Tenma, Kita-ku, Osaka Zojirushi Mahobin Co., Ltd. F-term (reference) 4B055 AA03 BA32 BA53 BA57 CA22 CC29 CC53 DA06 DB14

Claims (3)

[Claims] 1. A rice cooker provided with a waste removing device in the middle of a steam passage, wherein a sound deadening device is provided between the waste removing device and the steam hole. 2. The rice cooker according to claim 1, wherein the muffler includes a narrowed portion and an enlarged portion of a steam passage. 3. The rice cooker according to claim 1, wherein said muffler is detachably attached to a steam passage.