JP2003310430A - Steam path structure of rice cooker and steam path member used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an inexpensive use and convenience in handling by reducing the number of parts and the man-hours of separation and assembling work without impairing the function of preventing the blowing up of gruel. <P>SOLUTION: The structure is provided with the first path 33 running to the upper part thereof where a steam outlet 32 for releasing steam 41 outside is disposed from the lower part thereof where a return port 31 for returning the gruel into a pot 2 is disposed and the second path 34 arranged externally surrounding the first path 33. First and second steam inflow ports 35 and 36 are so arranged in the surrounding walls 40a2 and 40a3 of the first and second paths 33 and 34 respectively as to communicate with each other through the second path 34 while the positions thereof are differentiated circumferentially or/and in the direction of the height thereof and a gruel inflow port 37 is provided at the lower part of the surrounding wall 40a2 of the first path 33 to make the gruel flow into the first path 33 from the second path 34. Lower separation parts 40a which are integrated together and made separable from above are arranged below the first and second paths 33 and 34. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam passage structure for a rice cooker and a steam passage member used therefor.

[0002]

2. Description of the Related Art In a rice cooker that cooks rice by heating or heating a pot housed in a body, steam generated during cooking is released to the outside through a lid regardless of the heat source and is accompanied by steam. It has been so far devised that the spill that is about to flow out is separated and stored in the middle and returned to the pot.

FIG. 4 shows an example of a steam passage structure according to a proposal recently made by the applicant of the present invention. Explaining this, a lid a supported by a part of a body (not shown) so as to be opened and closed is provided with a steam passage b having a steam outlet m for letting steam escape to the outside. Vapor passage b is a lid
The lid side steam passage c formed by a and this lid side steam passage c
And a lower steam passage d connected to the above from below. The lower steam passage d forms a lower steam passage d having an expanded portion d1 which is larger than the lid-side steam passage c and is fitted in such a manner that the upper member e and the lower member f are detachably fitted to each other.

The lower steam passage d has a return port g for returning the abacus to the inside of the pan at the center of the bottom, and a connection port h detachably connected to the lid side steam passage c at the center of the upper part. ing. In the state where the connection port h is connected to the lid-side steam passage c, the shoulder portion i of the expansion portion d1 is close to the inner side surface of the lid a to form an annular gap j, and a plurality of holes are formed on the upper surface of the expansion portion d1. The steam inlet k of the steam in the pan through the gap j expands the lower steam passage d.
I am trying to install it in d1.

The steam introduced into the expansion part d1 is subjected to a throttling effect at the steam inlet k, and the expansion in the expansion part d1 causes gas-liquid separation, so that the heavy bed falls to the bottom of the expansion part d1 by its own weight. On the other hand, although the steam spreads lightly in the expanded portion d1, it rises from the lower steam passage d to the lid-side steam passage c through the connection port h, and escapes to the outside from the steam outlet m at the upper portion thereof.

By the way, the amount of water added when cooking rice has been conventionally adjusted based on the scale applied to the pan and many years of experience. However, sometimes there is an excess of water. For example, in old rice and winter, the water absorption of rice is low, and if the ratio of rice and water is normal, water tends to be excessive. If there is too much water, the amount of steam generated when cooking rice will increase,
The momentum when going out becomes stronger. In this case, the bean tends to flow out together with the steam, easily accumulate in the steam passage b, and easily blow out to the outside.

In the above-described conventional steam passage structure, the steam introduced into the expanded portion d1 of the lower steam passage d is prevented from entering the expanded portion d1 by the throttling action at the steam inlet k at the shoulder thereof. , The expansion and collision of the expansion part d1 flowing from the top toward the bottom wall and blowing, and the centrifugal separation during the upward U-turn diversion separates the stick and the steam from the bottom. The remaining steam is discharged to the outside from the steam outlet m through the lid-side steam passage c. As a result, it is easy to prevent the sleeper from being blown out together with the steam.

Further, even if the sticks remain or adhere to the steam passage b, the lid a is removed from the body, the lower steam passage d is removed from the lid side steam passage c, and the removed lower steam passage d is removed. By separating the upper and lower members e and f from each other, it is possible to greatly open each of them and easily wash every corner.

[0009]

However, according to the above-mentioned proposal, since the steam inlet k is provided in the shoulder portion of the expansion portion d1, the lower steam passage d having this is opened to facilitate cleaning. To do this, you have to divide it up and down. For this reason,
Since the number of parts increases and the number of steps for separation and assembly performed each time cleaning is performed increases, it is inconvenient to use and handle.

An object of the present invention is to provide a steam passage structure for a rice cooker which is inexpensive and convenient to use and handle by reducing the number of parts, man-hours for separating and assembling without impairing the function of preventing blowout. It is to provide a steam passage member used for it.

[0011]

The steam passage structure of a rice cooker according to the present invention allows steam generated during rice cooking in a pan to escape to the outside through a lid, and separates the sticks accompanying this steam. In the steam passage structure of the rice cooker that returns to the inside of the pan while storing, the first passage that leads to the upper part with the steam outlet that releases the steam from the lower part that has the return port A second passage provided outside the first passage, provided on the peripheral walls of the first and second passages and communicating with each other through the second passage, and having different positions in the circumferential direction and / or the height direction. 1. The first and second steam inlets, the bed inlet provided in the lower portion of the peripheral wall of the first passage to allow the first passage to flow into the first passage, and the lower portions of the first and second passages are integrally formed with each other. The main feature is that it has a lower separation part that can be separated from the upper side with .

In such a structure, the steam generated in the pan is caused to flow from the second steam inlet of the second passage into the second passage, and then from the first steam inlet of the first passage into the first passage. Since it is discharged to the outside of the lid from the steam outlet at the upper part of the lever, it is possible to prevent abnormal pressure increase in the pot.

At this time, the steam flowing into the second passage from the second steam inlet is different from the first steam inlet in that the position of the second steam inlet is different in the circumferential direction and / or the height direction. It does not pass through to the first steam inlet, but collides with the outer surface of the first passage to undergo gas-liquid separation from the bed and steam, and the heavy bed falls to the bottom of the second path and is received. The light steam travels until it reaches the first steam inlet while flowing along the second passage and flows into the first passage, and the steam is bent by the centrifugal action due to the path being bent by this distance. Centrifugal separation is performed, and the steam flows into the first passage from the first steam inlet while leaving the separated heavy bed in the second passage, and then the inner wall surface of the first passage facing the first steam inlet is formed. The collision causes further gas-liquid separation and vapor separation. Rises in the first passage, leaving a heavy Contact viscosity in the bottom section of the first passage reaches the top of the steam outlet is released to the outside.

As described above, the vapor discharged to the outside is repeatedly subjected to gas-liquid separation, and the bed which is trying to flow out together with the vapor is well separated in the first and second passages, and the lower part of the first passage is separated. Even if the water is trapped in the water and the water is excessively discharged with a large amount of steam, the gas-liquid separation performance is not insufficient, and the bed is not only blown out, but also to the lid side steam passage. It is also suitable for a rice cooker that is not suitable for full washing because the lid cannot be removed or it has electric equipment because it prevents it from flowing out and makes it easy to keep it clean with a simple wiping. Both the first and second passages have a straight and simple structure and are sufficient for separation and can be manufactured at low cost.

[0015] Further, the oneba separated in the first passage remains as it is, the oneba separated in the second passage flows into the first passage through the oneba inflow port, and the ladle by its own weight is returned through the oneba return port. Since it returns to the inside, it is also possible to prevent the separated beds of the first and second passages from collecting and blocking the first and second passages from being blown out by the steam.

Moreover, the steam passage structure having the double structure of the first and second passages is only a two-divided structure for separating the integrated lower separating portion from the upper side, and any dividing side is opened at the dividing portion. Since it is possible to reduce the number of parts for opening the first and second passages and the number of steps for separation and assembly, it is inexpensive and convenient for use and handling. It is easy to keep it clean with a simple wiping, without sticking to the lid side steam passage. This is particularly suitable when the lid cannot be separated from the body or is equipped with electric equipment and thus is not suitable for washing.

In a further configuration in which the first and second steam inlets are located on opposite sides of each other, the steam flowing from the second steam inlet into the second passage is transferred from the first steam inlet into the first steam.
In order to flow into the passage, it is necessary to divide it into the left and right along the second passage and reach at least the opposite side, so that centrifugal separation can be performed for each half of the left and right, and the separation effect of the mean can be increased accordingly. At this time, if the first steam inlet is at a position higher than the second steam inlet, the steam split left and right will collide strongly with each other after making a half turn, and then head toward the upper steam inlet. The stronger the bumps are, the more effective the separation effect is.

The second steam inlet is located at a predetermined height from the bottom of the second steam passage, and the first steam inlet is continuous upward with respect to the tonba inlet provided upward from the bottom surface of the second passage. In a further configuration which is a vertically elongated shape, since the second steam inflow port restricts the inflow height of the steam into the second passage from the bottom to a predetermined height and directs it toward the first steam inflow port, It is possible to prevent blow-off of the bed that is separated from the steam in the two passages and collects at the bottom portion, or is prevented from being accompanied by the steam flowing into the first passage. In addition, the sleeper inlet provided upward from the bottom surface of the second passage enables the sleeper to flow into the first passage from the second passage to the first passage in a barrier-free manner without difficulty, and above the sleeper inlet. The first vertical steam inlet that is continuous to the
Since it is formed as one inflow port, the structure is simpler than in the case where it is provided individually, and because it is vertically long, the steam flowing into the second passage at a predetermined height from the bottom of the second passage is Since the first channel is made to flow into the first channel at an upper position separated from the flow of the first channel flowing from the second channel to the first channel at the inlet, the first channel is discharged into the upper vapor outlet. The separated steam can be prevented from being entrained in the steam.

The second steam inlet is laterally long. In a further structure, the throttle action on the steam flowing into the second passage and the expansion at the time of flowing into the second passage by the amount that the required opening area is obtained in a narrow shape. The action facilitates the separation of the bed from the incoming steam. Further, since the required height from the bottom of the second passage can be secured at a low position, the required height of the second passage can be suppressed and the vertical bulkiness of the lid can be suppressed.

The first passage includes a lid-side steam passage provided on the lid side,
The inner side wall of the steam passage member is connected to the lid-side steam passage from below, and the second passage is integrally formed with the outer side wall of the outer side of the cylinder wall of the steam passage member. In a further configuration in which the lower separating portion is formed so as to be in contact with each other, one lid side vapor passage provided in the lid, an inner cylinder wall that is detachably connected to the vapor passage, and an outer cylinder around the inner cylinder wall are provided. Since it is composed of one vapor passage member as the lower separation portion, the lid side has a simple structure in which the second passage portion is omitted, so that the lower separation portion can be manufactured at low cost, and the lower separation portion has the first structure.
Although it has the lower half of the passage and the second passage, it can be manufactured inexpensively with a simple double wall structure having inner and outer cylindrical walls.

In a further configuration in which the inner cylinder wall is higher than the outer cylinder wall, and the upper end portion thereof is detachably supported in a part of the lid-side steam passage, the inner cylinder wall needs to be at least the second passage. It only needs to be taller than the outer cylinder wall.The lid side steam passage, which tends to have a complicated structure only with higher dimension conditions than the outer cylinder wall, shortens the lid side structure to make the lid side structure simpler and less bulky, and easier to clean. By utilizing a portion higher than the outer cylinder wall, it is possible to secure a connection margin with the shortened lid-side steam passage.

In a further configuration in which the first steam inlet is higher than the second passage, since the first steam inlet is located higher than the second steam inlet provided in the second passage, the first steam inlet is higher than the second steam inlet. After flowing into the second passage and being separated by
It does not disturb the flow of steam that rises upwardly through the first steam inlet into the first passage and reaches the upper steam outlet, and is farther away from the bottom of the first and second passages. Since it is more likely to be discharged into the bed, the effect of preventing the gushing of the tongue is further enhanced.

A salient return opening opens at the bottom of the first passage,
A valve is provided on the lower surface that pushes the stem open under its own weight and flows down into the pot.In a further configuration, the stems that are separated from the steam and gather at the bottom of the first passage push the valve open into the pot. Even if the steam in the pan tries to flow directly into the first passage from the return port while returning, the valve is pressed against the lower surface of the return port and becomes a check valve that closes it.
Since the direct inflow is blocked, it is possible to prevent the steam that is not separated from the wed from being discharged to the outside, or from being discharged to the outside while blowing up the wed at the bottom of the first passage.

The steam passage member of the rice cooker also has a tongue return port for returning the tongue in the pan at the bottom, a first steam inlet on the peripheral wall, and an upper end on the lid side. An inner cylinder wall that is detachably connected to the steam passage and forms a first passage that leads to a steam outlet that releases steam to the outside of the upper portion of the lid-side steam passage, and a peripheral wall that is integrally formed around the outer circumference of the inner cylinder wall. Steam of a rice cooker having a second steam inlet port, and an outer cylinder wall that abuts an inner surface of the lid and forms a second passage communicating from the second steam inlet port to the first steam inlet port. It also provides a passage member, and as described above, the inner cylinder wall can be higher than the outer cylinder wall.

Further objects and features of the present invention will be apparent from the following detailed description and the description of the drawings. The features of the present invention can be used alone or in combination in various combinations as much as possible.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below in detail with reference to FIGS. 1 to 3 for understanding of the present invention.

This embodiment is an example of a rice cooker for electromagnetic induction heating, but the invention is not limited to this. In short, as shown in FIG. 1, rice is cooked in a pot 2 housed in a body 1, and steam generated during cooking is released to the outside while separating and removing the bean curd through a steam passage 4 provided in a lid 3. INDUSTRIAL APPLICABILITY The present invention is effective when applied to the entire steam passage structure of a vessel, and all of them belong to the category of the present invention.

The container 1 has a hollow structure made of synthetic resin and accommodates the pan 2 so that the pan 2 can be attached and detached through the opening 1a at the upper end. The bottom inner work coil 6 and the bottom outer work coil 7 that are provided around the inner wall 5 that forms the pot housing portion of the container 2 and that face the central portion and the outer periphery of the bottom of the pot 2 face the body portion of the pot 2. A lid 3 that includes a body heater 8 and opens and closes the opening 1a of the body 1 and the opening 2a of the pan 2 is opened and closed by a hinge pin 13 on a bearing portion 1b provided at the rear portion of the shoulder of the body 1. It is connected. Due to the fact that the lid 3 is not removable, the opening 2a of the pan 2 is provided inside the lid 3.
The lid heater 15 is attached to the metal inner lid 14 provided in the range where
Is provided. However, the lid 3 may be provided so as to be attachable to and detachable from the body 1. The inner lid 14 may be detachably attached to the inside of these lids 3, or may be provided independently. In these cases, a shoulder heater (not shown) may be provided on the shoulder portion of the body 1 so that the heat can be transmitted to the inner lid 14 so that heating can be performed from the lid 3 side.

An operation panel 11 provided at the front of the body 1
An operation board 9 having an operation switch and an indicator lamp is provided inside, and inside the operation board 9, a bottom inside work coil 6, a bottom outside work coil 7, a body heater 8 and a lid heater 15 are provided. The control board 16 is equipped with a control unit that controls various driving states according to the rice cooking process, the amount of rice cooked, and the difference between rice cooking and heat retention, and a power supply circuit for each unit. However, these operations, display, drive control,
The various circuits relating to power supply may be basically divided and arranged in any way. Drive circuits for the bottom inner work coil 6 and the bottom outer work coil 7 are provided with heat-generating elements and electric elements such as IGBTs and coils.
Since the bottom inner work coil 6 and the bottom outer work coil 7 themselves also generate heat, a fan 17 for appropriately cooling them is provided.

The lid 3 is biased in the opening direction by the bias of the spring 21. A braking mechanism for braking the opening operation by the biasing of the spring 21 is provided as necessary, and a lock claw 23 biased by the spring 22 is provided so as to lock the lid 3 in the closed position so as not to open it arbitrarily. . The lock claw 23 unlocks the lid 3 by rotating counterclockwise about the shaft 24 against the spring 22, so that the lid 3 is automatically opened by the biasing of the spring 21.

Here, the steam generated during cooking in the pan 2 is released to the outside through the steam passage 4 of the lid 3, and the onions accompanying this steam are separated and returned to the pan 2 while being stored. However, in this embodiment, as shown in FIG. 1, the first passage 33 leading to the upper portion having the steam outlet 32 for letting the steam escape to the outside from the lower portion having the tongue return port 31 for returning the tongue in the pan 2 And a second passage provided outside the first passage 33.
And a passage 34. In addition to this, the first,
Inner and outer cylindrical walls 40a2, 4 which are peripheral walls of the second passages 33, 34
0a3, which communicate with each other through the second passage 34 and have different positions in the circumferential direction and / or the height direction.
The steam inlets 35, 36 and the inner cylindrical wall 40a of the first passage 33.
2. A tongue inlet 37 that is provided in the lower part of the second passage 34 for inflowing a weir from the second passage 34 to the first passage 33, and a lower separation portion that can be integrally separated from the upper side on the lower side of the first and second passages. 40a.

Such a steam passage 4 allows the steam generated in the pan 2 to escape to the outside of the lid 3, while the steam 41 generated in the pan 2 is used.
Is indicated by a dashed arrow in FIG.
After flowing into the second passage from the steam inlet 36, the first steam inlet 35 of the first passage 33 flows into the first passage 33 and is discharged from the upper steam outlet 32 to the outside of the lid 3. As a result, it is possible to prevent the pressure inside the pot 2 from being abnormally increased.

At this time, in the steam 41 flowing into the second passage 34 from the second steam inlet 36, the position of the second steam inlet 36 with respect to the first steam inlet 35 is in the circumferential direction and / or the height direction. It does not pass through to the first steam inlet 35 due to the difference. That is, the steam 41 flowing into the second passage 34 from the second steam inlet 36 collides with the outer wall surface of the first passage 33, and the bean 42 and the steam 41 undergo gas-liquid separation due to the collision action, The heavy tongue 42 falls and is received at the bottom of the second passage 34 as shown by the solid arrow, and the light steam 41 advances to the first steam inlet 35 while being bent along the second passage 34. Centrifugal action due to the fact that the path is bent by the distance traveled by Kotoki steam 41 causes centrifugal separation between the aunt 42 and the steam 41, and the steam 4
No. 1 flows into the first passage 33 from the first steam inflow port 35 while leaving the separated heavy bed 42 in the second passage 34. The steam 41 that has flowed into the first passage 33 also undergoes further gas-liquid separation if there is a bed 42 that remains by colliding with the inner wall surface of the first passage 33 that faces the first steam inlet 35. 41 is the separated heavy bed 42 and the first passage 33
Leaving the bottom of the first passage 33 up and the upper steam outlet 3
It reaches 2 and is released to the outside.

As described above, the steam 41 discharged to the outside is repeatedly subjected to gas-liquid separation, and the bed 42 which is about to flow out together with the steam 41 is well separated in the first and second passages 33 and 34. However, since it is trapped in the lower portion of the first passage 33, for example, in a height range commensurate with the inflow port 37, the gas-liquid separation is performed even when water is excessive and a large amount of steam is released vigorously. The performance is not inadequate, and the tongue 42 is not only blown out to the outside, but also flows out to the lid-side steam passage 40b, that is, to the upper steam passage portion that remains on the lid 3 side when the lower separating portion 40a is removed. Can be prevented, first,
Both of the second passages have a straight and simple structure and are sufficient for separation and can be manufactured at low cost. However, in some cases, the first and second passages 33 and 34 do not have to be provided straight, and can be a bent route or a bypass route, which makes the steam passage longer and further increases the chance of separation. It can be done.

In addition, the bed 4 separated by the first passage 33
No. 2 is left as it is, the one 42 which is separated by the second passage 34 flows into the first passage 33 through the one inlet 37, and returns to the inside of the pan 2 by its own weight through the one return port 31 there. Accordingly, it is possible to prevent the first and second passages 33 and 34 from separating and retaining the tongue 42 which blocks the first and second passages 33 and 34 and is blown out by the steam 41. it can.

Moreover, the structure of the steam passage 4 having the double structure of the first and second passages 33 and 34 is only a two-divided structure for separating the integrated lower separating portion 40a from the upper side thereof, and whichever dividing side Can also be opened at the division,
Since the number of parts for opening the first and second passages 33, 34, and the number of steps for separation and assembly are reduced, it is inexpensive and convenient for use and handling. As described above, since the lid 42 does not reach the steam path 40b on the lid side, it is easy to keep it clean by simple wiping. This is particularly suitable in the case where the lid 3 cannot be separated from the body 1 as in this example, or is equipped with electric equipment and thus has a structure not suitable for full washing.

The first and second steam inlets 35 and 36 are shown in FIGS.
As shown in FIG. 3, they are located on opposite sides of each other.
As a result, the steam that has flowed into the second passage 34 from the second steam inlet 36 flows into the first passage 33 from the first steam inlet 35, while the steam 41 is split left and right along the second passage 34. Since it is necessary to reach at least the opposite side, centrifugal separation can be performed for each of the left and right half circles, and the separation effect of the tongue 42 is increased by that much. At this time, if the first steam inlet port 35 is located higher than the second steam inlet port 36, the left and right steam 41 swirl a half turn, and as shown in FIG. 1 You will be heading to the steam inlet 35, and you have to ask 4
The separation effect of 2 is further enhanced.

As shown in FIG. 2, the second steam inlet 36 is located at a predetermined height A from the bottom of the second passage 34. In addition, the first steam inlet 35 has a vertically elongated shape that is continuous upward with respect to the tonba inlet 37 provided upward from the bottom surface of the second passage 34. As a result, the second steam inlet 36 restricts the inflow height of the steam 41 into the second passage 34 to a predetermined height A from the bottom thereof, and directs it toward the first steam inlet 35. Therefore, in the second passage 34, the steam 41
It is possible to prevent the tongue 42 which is separated from the air and is collected at the bottom part from being blown off or accompanied by the steam 41 flowing into the first passage 33. In addition, the tonba inlet 37 provided upward from the bottom surface of the second passage 34 serves as the second passage 3
In order to allow the barrier 42 to flow into the first passage 33 from the No. 4 barrier-free without difficulty, the inlet port 3
7 is a vertically elongated first steam inlet 35 continuous upward
Since it is formed as one inflow port together with the tonba inflow port 37, the structure is simpler than in the case where it is provided individually, and since it is vertically long, it is at a predetermined height A from the bottom of the second passage 34. The steam 41 flowing into the passage 34 is transferred from the second passage 34 to the first passage 33 at the lower part of the inlet 37.
Is flowed into the first passage 33 at an upper position separated from the flow of the weed 42. As a result, the first passage 33
It is possible to prevent the separated tongue 42 from being entrained in the steam 41 which flows into the above and is discharged toward the upper steam outlet 32. In this example, the first and second passages 33 and 34
Are set to the same level, but if the bottom of the first passage 33 is made lower than the bottom of the second passage 34, not only the barrier-free, but also the barb 42 of the bottom of the second passage is set to the first level.
The bottom side of the passage 33 can be made to flow more positively, and the side wall 42 from the first passage 33 to the second passage 34
Since the backflow of No. 42 can be prevented, the returning action of the bed 42 into the pan 2 is enhanced.

As shown in FIGS. 2 and 3, the second steam inlet 3
6 is horizontally long, for example, the width C is several times larger than the height B. By doing so, the inflowing steam flows into the tongue 42 by the throttling action on the steam 41 flowing into the second passage 34 and the expansion action when flowing into the second passage 34 as much as the required opening area is obtained in a narrow shape. It is easy to separate from 41. Further, since the required height A from the bottom of the second passage 34 can be secured at a low position, the required height of the second passage 34 can be suppressed and the vertical bulkiness of the lid 3 can be suppressed.

As shown in FIGS. 1 and 2, the first passage 33 is
The lid side steam passage 40b is provided on the lid 3 side, and the inner cylinder wall 40a2 of the steam passage member 40a1 is connected to the lid side steam passage 40b from below. The second passage 34 is formed by an outer cylinder wall 40a3 integrally formed around the inner cylinder wall 40a2 of the steam passage member 40a1 in contact with the inner side surface of the lid 3 to form the lower separation portion 40a. As described above, one lid-side steam passage 40b provided in the lid 3, the inner cylindrical wall 40a2 that is detachably connected to the lid-side steam passage 40b, and the outer cylindrical wall 4 that surrounds the inner cylindrical wall 40a2.
0a3 and one steam passage member 40a1 forming the lower separation portion 40a, the lid 3 side has a simple structure in which the second passage portion is omitted, so that it can be manufactured at low cost. The side separation portion 40a has a lower half portion of the first passage 33 and a second passage 34, but the inner and outer cylindrical walls 40a2, 4
The steam passage member 40a1 is, so to speak, a detachable steam cap for constituting the lower side of the steam passage 4, since it can be manufactured at a low cost because it may be a simple double wall structure having 0a3.

As shown in FIG. 2, the height D of the inner cylinder wall 40a2 is higher than the height E of the outer cylinder wall 40a3, and the upper end of the inner cylinder wall 40a2 can be attached to and detached from a part of the lid side steam passage 40b. Like to support. As a result, it is sufficient that the inner cylindrical wall 40a2 has at least the required height A of the second passage 34.
0a3, the lid side steam passage 40b, which tends to have a complicated structure only by the dimension condition, is shortened to make the lid 3 side structure simpler and less bulky and easier to clean. By utilizing the high portion, the connection margin S with the shortened lid side steam passage 40b can be secured.

The first steam inlet 35 is connected to the second passage 34.
F is higher than. As a result, the second passage 3
Since the first steam inlet port 35 is located higher than the second steam inlet port 36 provided in FIG. Without disturbing the flow of the steam 41 that flows into the first passage 33 through the first steam inlet 35 and reaches the upper steam outlet 32,
In addition, the tongue 4 at the bottom of the first and second passages 33 and 34
Since it is more easily discharged from the upper part to the outside from 2, it is possible to further enhance the blowout preventing effect of the tongue 42.

Further, the return port 31 has the first passage 33.
A valve 43 is provided which opens at the bottom of the pan and the lower side of which the barb 42 pushes open by its own weight and flows down into the pan 2. Accordingly, the tongue 42 separated from the steam 41 and gathering at the bottom of the first passage 33 pushes the valve 43 open to return it into the pot 2, while the steam 41 in the pot 2 moves from the tongue return port 31 to the first position. Even if an attempt is made to directly flow into the first passage 33, the valve 43 is a check valve that is pressed against the lower surface of the return port 31 and closes it, so that the direct inflow is blocked.
It is possible to prevent the steam 41 which is not separated from being discharged to the outside, and from being discharged to the outside while blowing up the bed 42 at the bottom of the first passage 33.

More specifically, as shown in FIG. 1, the lid 3 has a hollow structure in which an upper plate 51 and a lower plate 52 made of synthetic resin are integrated with each other by screwing or the like. An inner lid 14 made of metal facing the opening 2a of the pan 2 is fitted and attached to the provided opening. Especially, during heating, a lid heater 15 is used to uniformly heat the upper portion of the rice so that the upper portion of the rice is reduced in temperature to cause dew condensation. It prevents such things.
A heat insulating material 53 is built in the upper portion of the inner lid 14 to prevent heat from escaping to the upper portion. A cylindrical wall 40b1 that forms a lid-side steam passage 40b is integrally formed downward on the upper plate 51, and a lower end of the cylindrical wall 40b1 seals a gap between the cylinder wall 40b1 and a hole edge of a hole 54 through which the steam passage 4 of the lower plate 52 passes. Cylinder wall 4
A seal member 55 is attached to support the upper end of 0b1 so that the upper end of 0b1 can be detachably attached to the lid-side steam passage 40b.
A heat insulating material 61 is also provided around the outer circumference of the body heater 8 to prevent heat from escaping and affecting heat. A temperature sensor 62 is provided in the center of the inner wall 5 of the body 1 to detect the temperature by contacting the bottom of the pot 2.

The sealing member 55 is made of, for example, silicon rubber, and has a support edge 55a formed by a portion in which smooth upper and lower slopes form a mountain shape and abut on the inner side from the upper and lower ends toward the middle portion. A flange-shaped convex portion 56 integrally formed on the outer periphery of the upper end portion of the inner cylinder wall 40a2 of the steam passage member 40a1 is elastically passed from below to the support edge 55a, so that the inner cylinder wall 40a2 and the lid-side steam passage Four
0b are fitted with each other with the connection margin S and are sealed with each other by the seal member 55 so that the steam 41 and the like are in a leak-free connection state, and the convex portion 56 of the inner cylindrical wall 40a2 is supported by the support edge of the seal member 55. The steam passage member 40a1 is supported in the connected state by being hooked on the upper side of 55a, and when the steam passage member 40a1 is pulled downward, the support is unraveled by the elastic deformation of the seal member 55, so that it can be detached and separated. The convex portion 56 may be annular, but as shown in the figure, it may be set to two or more discontinuous numbers. The convex portion 56 is the inner cylinder wall 40a.
There is no problem if it is provided above the second steam inlet 35.

In the connected state of the steam passage member 40a1, the upper end of the outer tubular wall 40a3 abuts the lower surface formed by the inner lid 14 of the lid 3 to form the second passage 34 therebetween, and the outer tubular wall 40a1.
A second steam inlet 36 formed by cutting out the upper end of a3 is opened to a predetermined size with the inner lid 14.
Further, the upper end of the outer cylinder wall 40a3 abuts on the lower surface of the lid 3, that is, the inclined portion 14a formed by the inner lid 14 in the figure, and the outer cylinder wall 40a3 is elastically acted by the inclined portion 14a. Even if the height of the upper end changes due to dimensional error of parts, position error due to assembly, etc., by itself,
Alternatively, the elasticity of the seal member 55 can be assisted and absorbed to some extent. Moreover, the inclined portion 14a is formed on the outer cylinder wall 4
Since the upper end portion of 0a3 is oriented so as to surround it from the outside, the contact portion between the outer cylindrical wall 40a3 and the lower surface of the lid 3 is not exposed, so that it has a good appearance.

As shown in FIGS. 1 and 2, the bed return port 31 is partially continuous with the bed inlet 37 and the first steam inlet 35, and the first steam is used for die-cutting during molding. The tapered shape is slightly tapered toward the upper end of the inflow port 35. The base width T of the inlet 37 is substantially the same as the width C of the second steam inlet 36, and is slightly smaller than the upper end width T of the first steam inlet 35. The opening area of the first steam inlet 35 is larger than the opening area of the second steam inlet 36. As a result, the steam 41 causes the second steam inlet 36
From the first steam inlet 35 to the first passage 33 is larger than the resistance when flowing from the first steam inlet 35 to the second passage 34, and the pressure of the steam 41 in the first and second passages is increased. It is possible to prevent the increase, and the area ratio is preferably about 5 times. In the present example, such an area relationship is satisfied by the first steam inlet 35 being vertically long. However, although other configurations can be satisfied, the smaller the width of the first and second steam inlets 35 and 36, the smaller the width of the steam 41 from the second steam inlet 36 to the first steam inlet 35. Since the turning distance becomes large, it is advantageous for separating the tongue 42. Each of the first and second passages 33 and 34 and the oneba inlet 37 may be divided into a plurality of holes or notches, or conversely, the number of the returning ports 31 may be reduced from four shown in the figure. You can also do one.

Further, the diameter G of the steam passage member 40a1 is 2
It is preferable to set the diameter to about 1/4 of the diameter H of the opening 2a in order to appropriately discharge the vapor 41 to the outside without impairing the gas-liquid separation. Further, the diameter J of the inner cylindrical wall 40a2 and the second passage 34
The width K is substantially the same as the width K, which is suitable for discharging the vapor 41 and separating the tongue 42.

A flange 57 is provided on the outer periphery of the lower end portion of the steam passage member 40a1 to serve as a finger-holding portion for pulling it downward. Furthermore, a sealing member 58 between the inner lid 14 and the lower plate 52 is sandwiched between the inner lid 14 and the lower plate 52 so that the pot 2 can be sealed except for the steam passage 4. The valve 43 of the return port 31 is a thin sheet made of silicon rubber or the like, and has a mounting protrusion 4 integrally formed at the center.
3a is attached by forcefully fitting it from below into a support hole 59 provided in the center of the return port 31.

[0050]

According to the present invention, when the steam generated in the pan is discharged to the outside of the lid, the steam flowing into the first passage from the first steam inlet is the second steam with respect to the first steam inlet. Since the position of the inflow port is different in the circumferential direction and / or in the height direction, it does not pass through to the second steam inflow port, but it collides with the outer surface of the first passage to separate gas and liquid from the aunt and steam. On the other hand, the heavy bed is dropped and received at the bottom of the second passage, but the light steam is bent along the second passage and reaches the first steam inlet to flow into the first passage. Centrifugal action due to the fact that the path is bent by a distance causes centrifugal separation from the steam and steam, and the steam is separated from the first steam inlet to the first passage, leaving the separated heavy weir in the second passage. It flows in and collides with the inner wall surface facing the first steam inlet of the first passage. Undergo further gas-liquid separation by Rukoto, steam is discharged to the outside increases the first passage, leaving a heavy Contact viscosity was separated into the bottom portion of the first passage reaches the top of the steam outlet.

As described above, the vapor discharged to the outside is repeatedly subjected to gas-liquid separation, and the bed which is trying to flow out together with the vapor is well separated in the first and second passages, and the lower part of the first passage is separated. Even if the water is trapped in the water and the water is excessively discharged with a large amount of steam, the gas-liquid separation performance is not insufficient, and the bed is not only blown out, but also to the lid side steam passage. It is also suitable for a rice cooker that is not suitable for full washing because the lid cannot be removed or it has electric equipment because it prevents it from flowing out and makes it easy to keep it clean with a simple wiping. Both the first and second passages have a straight and simple structure and are sufficient for separation and can be manufactured at low cost.

In addition, the oneba separated in the first passage flows into the first passage as it is, and the oneba separated in the second passage flows into the first passage through the oneba inflow port, and the ladle by its own weight passes through the oneba return port. Since it returns to the inside, it is also possible to prevent the separated beds of the first and second passages from collecting and blocking the first and second passages from being blown out by the steam.

Moreover, the steam passage structure having the double structure of the first and second passages is only a two-divided structure for separating the integral lower separating portion from the upper side, and both dividing sides are opened at the dividing portion. Since it is possible to reduce the number of parts for opening the first and second passages and the number of steps for separation and assembly, it is inexpensive and convenient for use and handling. It is easy to keep it clean with a simple wiping, without sticking to the lid side steam passage. This is particularly suitable when the lid cannot be separated from the body or is equipped with electric equipment and thus is not suitable for washing.

According to a further configuration in which the first and second steam inlets are located on opposite sides of each other, the steam flowing from the second steam inlet into the second passage is discharged from the first steam inlet into the first passage. In order to flow into one passage, it is necessary to divide it into the right and left along the second passage and reach at least the opposite side. Therefore, it is possible to perform centrifugal separation for each left and right half circumferences, and the separation effect of the summit is increased by that amount. At this time, if the first steam inlet is at a position higher than the second steam inlet, the steam split left and right will collide strongly with each other after making a half turn, and then head toward the upper steam inlet. The stronger the bumps are, the more effective the separation effect is.

The second steam inlet is located at a predetermined height from the bottom of the second steam passage, and the first steam inlet is continuous upward from the bottom of the second passage, which is upwardly provided with respect to the oneba inlet. According to the further configuration of the vertically elongated shape described above, the second steam inlet restricts the inflow height of the steam into the second passage from the bottom to a predetermined height and directs it toward the first steam inlet. Thus, it is possible to prevent blow-off of the bed that is separated from the steam and collects at the bottom in the second passage, or is accompanied by the steam flowing into the first passage. In addition, the sleeper inlet provided upward from the bottom surface of the second passage enables the sleeper to flow into the first passage from the second passage to the first passage in a barrier-free manner without difficulty, and above the sleeper inlet. The first vertical steam inlet that is continuous with the first steam inlet is formed as a single inlet together with the Onebane inlet, so that the structure is simpler than when it is provided separately, and the second steam inlet is
The steam flowing into the second passage at a predetermined height from the bottom of the passage is first separated at the upper position where it is separated from the flow of the weed flowing into the first passage from the second passage at the lower inlet of the first passage. Since it is made to flow into the passage, it is possible to prevent the steam that has flowed into the first passage and is discharged toward the steam outlet in the upper portion from being accompanied by the separated granules.

The second steam inlet is laterally long. In a further structure, the throttle action on the steam flowing into the second passage and the expansion at the time of flowing into the second passage by the amount that the required opening area can be obtained in a narrow shape. The action facilitates the separation of the bed from the incoming steam. Further, since the required height from the bottom of the second passage can be secured at a low position, the required height of the second passage can be suppressed and the vertical bulkiness of the lid can be suppressed.

The first passage includes a lid-side steam passage provided on the lid side,
The inner side wall of the steam passage member is connected to the lid-side steam passage from below, and the second passage is integrally formed with the outer side wall of the outer side of the cylinder wall of the steam passage member. According to the further configuration which is formed in contact with each other to form the lower separation portion, one lid-side steam passage provided in the lid, the inner cylinder wall that is separably connected to the steam passage, and the outer cylinder around the inner cylinder wall. Since it is composed of one steam passage member as the lower separating portion, the lid side has a simple structure in which the second passage portion is omitted, so that the lower separating portion can be manufactured at low cost. Although it has the lower half part of one passage and the second passage, it can be manufactured inexpensively with a simple double wall structure having inner and outer cylindrical walls.

According to a further configuration in which the inner cylinder wall is higher than the outer cylinder wall and the upper end portion of the inner cylinder wall is detachably supported by a part of the lid side steam passage, the inner cylinder wall is at least the second cylinder wall.
If the required height of the passage is sufficient, the lid side steam passage, which tends to have a complicated structure only with dimensions higher than the outer cylinder wall, shortens the lid side structure to make the lid side structure simpler and less bulky, and easier to clean. However, it is possible to secure a connection margin with the shortened lid-side steam passage by utilizing a portion higher than the outer cylinder wall.

According to a further structure in which the first steam inlet is higher than the second passage, the second steam inlet is located higher than the second steam inlet provided in the second passage. After having flowed into the second passage from the inlet and undergoing separation, it does not disturb the flow of steam that rises upwardly into the first passage through the first steam inlet and reaches the upper steam outlet, and Since it is more easily discharged to the outside from the bed at the bottom of the first and second passages, it is more likely to be discharged to the outside.

The tongue return opening opens at the bottom of the first passage,
A valve is provided on the lower surface to push the stem open under its own weight and flow down into the pan. According to a further configuration, the stem that separates from the steam and gathers at the bottom of the first passage pushes the valve open to open the pot. Even if the steam in the pot tries to flow directly into the first passage from the return port while returning it to the inside, the valve is pressed against the lower surface of the return port and becomes a check valve that closes it. Since the direct inflow is blocked, it is possible to prevent the steam which is not separated from the wed and is released to the outside or is released to the outside while blowing up the wed at the bottom of the first passage.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a rice cooker having a steam passage structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a steam passage structure portion of the rice cooker of FIG.

FIG. 3 is a plan view showing a steam passage member as a lower separation portion in the steam passage structure portion of FIG.

FIG. 4 is a cross-sectional view of a main part showing a steam passage structure of a rice cooker that is the previously proposed example.

[Explanation of symbols]

1 body 2 pots 3 lid 4 steam passage 31 Oneba return port 32 Steam outlet 33 First passage 34 Second passage 35 First steam inlet 36 Second steam inlet 37 Oneba Inlet 40a lower separation part 40a1 Steam passage member 40a2 inner cylinder wall 40a3 Outer cylinder wall 40b Lid side steam passage 41 steam 42 Oneba 43 valves 55a support edge 56 convex

Claims (10)

[Claims] 1. A steam passage structure of a rice cooker, in which steam generated during rice cooking in a pan is released to the outside through a lid, and the bean that accompanies this steam is separated and stored and returned to the inside of the pan. It is equipped with a first passage leading to the upper part with a steam outlet that allows steam to escape to the outside from the lower part having a return port and a second passage provided outside the first passage. , First and second steam inlets which are provided on the peripheral walls of the first and second passages and communicate with each other in the second passage, and the positions of which are different in the circumferential direction and / or the height direction, and the lower portion of the peripheral wall of the first passage. And a lower part that can be separated from the upper part integrally with each other on the lower side of the first and second passages. The steam passage structure of the rice cooker. 2. The steam passage structure for a rice cooker according to claim 1, wherein the first and second steam inlets are located on opposite sides of each other. 3. The second steam inlet is located at a predetermined height from the bottom of the second steam passage, and the first steam inlet is located above the bottom of the second passage with respect to the tonba inlet provided upward. The steam passage structure of the rice cooker according to any one of claims 1 and 2, wherein the steam passage structure has a vertically long continuous shape. 4. The steam passage structure for a rice cooker according to claim 3, wherein the second steam inlet is horizontally long. 5. The first passage is composed of a lid-side steam passage provided on the lid side, and an inner cylinder wall of a steam passage member connected to the lid-side steam passage from below, and the second passage is formed of the steam passage member. An outer cylinder wall integrally formed around the outer circumference of the cylinder wall is formed in contact with an inner side surface of the lid to form the lower separation portion.
The steam passage structure of the rice cooker according to any one of 1. 6. The steam passage structure for a rice cooker according to claim 5, wherein the inner cylinder wall is higher than the outer cylinder wall, and an upper end portion of the inner cylinder wall is supported so as to be attachable to and detachable from a part of the lid-side steam passage. 7. The steam passage structure for a rice cooker according to claim 1, wherein the first steam inlet is higher than the second passage. 8. The salmon return port is opened at the bottom of the first passage, and a valve is provided on the lower surface of the salmon to allow the stem to open by its own weight and flow down into the pan. The steam passage structure of the rice cooker according to the item. 9. The lower part has a tongue return port for returning the tongue in the pan and the peripheral wall has a first steam inlet, and the upper end is connected from below so as to be attachable to and detachable from a lid side steam passage provided in the lid. And an inner cylinder wall forming a first passage communicating with a steam outlet for letting steam escape to the outside of the lid-side steam passage upper part, and a second steam inflow port integrally formed around the outer circumference of the inner cylinder wall,
A steam passage member for a rice cooker, comprising: an outer cylinder wall that is in contact with an inner surface of the lid and forms a second passage from the second steam inlet to the first steam inlet. 10. The steam passage member for a rice cooker according to claim 9, wherein the inner cylinder wall is higher than the outer cylinder wall.