JPS63187Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a rice cooker in which rice is cooked by closing an inner pot housed in a container with an inner lid that is removably suspended by a hanging member at the center of the back of the lid of the container. The present invention relates to a pressure regulating device that regulates the pressure inside an inner pot by restricting the release of steam generated within the inner pot to the outside.

Various pressure regulating devices of this type have been provided in the past. The steam released from the inside of the inner pot to the outside includes the soot generated during cooking, and a steam release passage with a sodium collection chamber that separates this and releases the steam has also been proposed. The passage is formed by a separate accessory part installed on the inner lid or the lid of the container for the purpose of steam release, which complicates the lid structure of the rice cooker itself and increases costs, as well as increasing the cost of the rice cooker. Due to the limited size of the sludge, sufficient sludge storage capacity may not be achieved, and the sludge separation and storage function may gradually deteriorate, or once the sludge separation and storage capacity is
Even the stored sticky goo is blown out of the container by the released steam and scattered around the steam release part of the lid of the container.

This device forms a sop storage chamber surrounded by an annular seal part between the container lid and the inner lid that can be freely moved in and out of the container, around the inner lid suspension member between the container lid and the inner lid. A pressure regulating device for a rice cooker that can eliminate the above-mentioned conventional drawbacks by forming a steam collecting chamber and a steam release passage with a pressure regulating valve that communicates the inside of the inner pot with the outside of the container through the hanging member or its attachment part. The purpose is to provide the following.

Describing the embodiment shown in FIGS. 1 and 2, the container body 1 is comprised of an inner container 2 forming the container body 1.
A heat insulator body is provided in which a heat insulating material 4 is loaded between the outer case 3 and the outer case 3. At the bottom of the inner container 2, there is a container body 1.
A heating plate 6 with a built-in heater is installed to receive and heat the inner pot 5 housed in the pot. The heating plate 6 is equipped with a known heat-sensitive switching member 7 that senses a sudden rise in temperature due to water running out at the end of rice cooking and switches the heater circuit from cooking rice to keeping it warm.

A container lid 8 that closes the container 1 is provided with one end of a handle 9 provided on the diameter line of its upper surface pivoted by a shaft 10 on one side of the shoulder of the container 1 so that it can be opened and closed. A lock lever 12, which is pivotally supported at the other end by a shaft 11, elastically engages with a locking portion 13 on the shoulder of the container 1, thereby locking the container in the closed state. Reference numeral 12a denotes an operating portion of the lock lever 12, and when this is pushed, the lever 12 disengages from the locking portion 13 against the force of the spring 14 acting on it. The container lid 8 is also loaded with a heat insulating material 4 and has a built-in lid heater 15 that is energized during heat retention.

A hanging pin 16 is fixed to the center of the back surface of the container lid 8, and an elastic bushing 19 attached to a central hole 18 of the inner lid 17 that closes the inner pot 5 is elastically fitted onto the lower end head 16a of the hanging pin 16, so that the inner lid 17 is detachably hung.
When the lock is closed, the downward step 1 of the suspension pin 16
6b is pressed against the rim step 5a of the inner pot 5 via the bushing 19, thereby closing the inner pot 5.

The suspension pin 16 between the container lid 8 and the inner lid 17 is surrounded by an annular seal portion formed by pressing an annular seal packing 20 attached to the lower surface of the container lid 8 onto the upper surface of the inner lid 17. A sticky storage chamber 21 is formed. The portion of the inner lid 17 that forms the soot storage chamber 21 is a downward concave portion 17a, which enlarges the soot reservoir chamber 21 and
The seal packing 20 is received on the annular rising surface 17b formed by the packing 20.
This enhances the sealing effect between the inner lid 17 and the inner lid 17. The seal packing 20 is attached to the edge of the central hole 22a formed in the synthetic resin back plate 22 of the container lid 8,
Place the screw 2 into the central hole 22a from below.
It is clamped and held within the annular groove 22b of the back plate 22 between the outer periphery of the metal heat dissipation plate 24 and the outer periphery of the metal heat sink plate 24 which is attached to the metal heat sink 24.

The seal packing 20 presses the inner cover 17 and its fairly large diameter portion, and as a result, serves to uniformly press the outer periphery of the inner cover 17 against the lip step 5a of the inner pot 5, and the inner cover 17 and its relatively large diameter portion are pressed against each other. It is easy to prevent steam from escaping from a part of the inner pot 5 due to the uniform pressure bonding between the inner pot 5 and the inner pot 5, and the pressure bonding to the inner lid 17 by the hanging pin 16 can be omitted. On the inner surface of the heat sink 24,
The lid heater 15 is crimped by a heater press plate 25. The hanging pin 16 is inserted into the heat sink 24 and the presser plate 25 from below, and is attached to the container lid 8.
The top plate 26 and the heat sink 2 are screwed together 28 with a mounting bracket 27 inserted from above into the top plate 26.
4. It is attached to the container lid 8 with the press plate 25 fastened.

Inside the hanging pin 16 and the mounting bracket 27, there is a steam release passage 3 equipped with a pressure regulating valve 29, which communicates the inside of the inner pot 5 with the outside of the vessel 1 via the steam storage chamber 21.
0 is formed. In the steam release passage 30, a valve seat 32 is formed by attaching an elastic bush 31 to an opening 30a from the lower end of the suspension pin 16 into the inner pot 5. The pressure regulating valve 29 housed in a freely movable manner is seated under its own weight so that it is always in a closed state, and the suspension pin 1
The released steam is allowed to pass through the soot accumulating chamber 21 by an upper communicating hole 33 and a lower communicating hole 34 formed in upper and lower two stages in the peripheral wall of 6 so as to communicate with the soot accumulating chamber 21 .

The steam inside the inner pot 5 is released via this sticky storage chamber 21 when the pressure inside the inner pot 5 exceeds the set pressure.
The internal steam pushes up the pressure regulating valve 29 to the imaginary line position where it can flow out, and the soot accumulating chamber 2 flows through the lower communication hole 34.
After being blown into the vessel 1 , the steam returns to the suspension pin 16 through the upper communication hole 33 and flows out of the vessel 1 through the steam release hole 35 provided at the upper end of the mounting bracket 27 . When steam is blown into the soot accumulating chamber 21 from the lower communication hole 34, the soot accompaniment force is attenuated because the soot accumulating chamber 21 is large, and the steam that has entered the soot accumulating chamber 21 is
By making a sudden turn and returning from the upper communication hole 33 into the suspension pin 16 as shown by the imaginary line in the figure,
The soot that has accompanied the discharged steam is separated from the steam and falls to the bottom of the soot collecting chamber 21, as shown by the broken line, where it remains. This residual slime can be removed by forming the slime storage chamber 21 widely.
It is not blown out to the outside along with the steam that is successively released.

Even if the sticky storage chamber 21 is formed wide, the concave portion 1
7a, only the diameter of that part becomes larger, resulting in unsightly appearance, increased weight, and increased material costs, similar to when increasing the diameter of a conventional appendage. There is no such problem, and by forming it around the central suspension pin 16, it is possible to have an even width around the suspension pin, so there is no narrow part and the waste separation and storage function is improved. There is no possibility of a steam bypass path having a low temperature. Further, the entire area of the sticky storage chamber 21 is opened by removing the inner lid 17 from the container lid 8.
By normal cleaning and wiping of the container lid 8, it is possible to remove the dried and adhered waste that has been separated and stored. No more handling required.

The pressure regulating valve 29 returns to the closed state due to its own weight each time the pressure inside the inner pot 5 drops below the set pressure due to steam release, so steam is released intermittently while repeating up and down movements. The valve stem 29a is exposed on the upper surface of the container lid 8 and moves up and down, allowing the user to check the pressure regulation status.

The part on the back side of the container lid 8 that is surrounded by the seal packing 20 and forms the ceiling surface of the sticky accumulating chamber 21 is made of a metal heat sink 24, and the high-temperature steam is kept inside the sticky accumulating chamber 21. Even if it is blown into the air, it will not deteriorate due to heat.

In the embodiment shown in FIG.
A plurality of openings 30a are formed into the inner pot 5, and the steam in the inner pot 5 first enters the sticky storage chamber 21, and then passes through the suspension pin 16 to the steam release passage 30 in the suspension pin 16. It enters through a communication hole 41 in the middle and exits to the outside. In this case, the soybean paste separated and stored in the soybean storage chamber 21 flows down and returns into the inner pot 5 through the opening 30a as shown by the broken line when the steam release from the opening 30a weakens. The pressure regulating valve 29 is housed between the mounting bracket 27 and a cap 43 screwed thereon, and seats under its own weight against a valve seat 44 formed at the upper end of the mounting bracket 27, and the inside of the inner pot 5 is set. Every time there is pressure, it is pushed open,
It allows steam to be released. Steam release hole 3
5 is opened on the peripheral wall of the cap 43, and the structure for pressing the inner lid 17 against the inner pot 5 by the suspension pin 16 is omitted.

The embodiment shown in FIG. 4 is a modification of the case shown in FIG. The steam enters the steam release passage 30 in the mounting bracket 27 through a communication hole 51 opened around the mounting portion of the pin 16, pushes open the pressure regulating valve 29, and exits to the outside. The pressure regulating valve 29 only receives the valve receiving protrusion 52 in the mounting bracket 27, and the cap 4
The outer diameter is approximately equal to the inner diameter of the steam release hole 35, and the steam release hole 35 is moved upward to a position where steam can escape from the steam release hole 35, and is in an open state.

FIG. 5 shows that the seal packing 20 is made into a straight cylindrical shape, as opposed to the flap opening shape in each of the above embodiments, so that it is difficult to be pushed out to the outside of the rising surface 17b even if pressure is applied inside the inner pot 5. .
This ensures pressure regulation within the inner pot 5. The seal packing 20 has mounting protrusions 20a protruding from several places on its upper edge attached to the back plate 22 of the container lid 8.
It is attached by forcibly fitting into the attachment hole 61 formed in the.

FIG. 6 shows that the seal packing 20 fitted in the annular groove 72 on the inner lid 17 is crimped by the annular projecting wall 71 formed on the back surface of the container lid 8, and the container lid 8 and the inner lid are pressed together. 17, which further enhances the sealing effect of the annular seal portion surrounding the sticky storage chamber 21. The annular projecting wall 71 is formed on the heat sink 24 . In this case, the lid heater 15 received on the heat sink 24
Since the heat from the inner lid 17 is easily spread to the entire area of the inner lid 17 without being obstructed by the seal packing 20, dew condensation on the inner surface of the inner lid 17 due to heating by the lid heater 15 is sufficiently prevented.

According to this invention, a soybean storage chamber is provided around the inner lid suspension member between the container lid and the inner lid, which is surrounded by an annular seal portion that can be freely moved in and out between the container lid and the inner lid. Since a steam discharge passage with a pressure regulating valve that communicates the inside of the inner pot with the outside of the vessel through the hanging member or its attachment part is formed, accessory parts dedicated to regulating the pressure include an annular seal packing and the like. Only the pressure regulating valve is required, which simplifies the structure of the entire lid. In addition, it is possible to form a sufficiently large and evenly sized potion storage chamber around the suspension member, without causing problems such as increase in size, weight, or unsightly appearance, and the release of steam from the potion to the outside. This can prevent the occurrence of balloons. Furthermore, the slime storage chamber is formed and opened by attaching and detaching the inner cover to and from the vessel cover, and does not require any special handling or work including cleaning.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view showing one embodiment, Fig. 2 is an enlarged sectional view of the main part, Fig. 3 is a sectional view of the main part of another embodiment, and Fig. 4 is a cross-sectional view of the main part of another embodiment. 5 and 6 are partial sectional views showing different modifications, respectively. 1... Vessel body, 5... Inner pot, 8... Vessel lid, 15
. . . Lid heater, 16 .
24... Heat sink (back plate metal part), 27... Mounting bracket, 29... Pressure regulating valve, 29a... Valve stem, 30
...Steam release passage, 30a...Opening, 33,3
4, 41, 51...Communication hole, 35...Steam release hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a rice cooker in which rice is cooked by closing an inner pot housed in the container with an inner lid that is removably suspended by a hanging member at the center of the back of the lid of the container, Around the hanging member between the vessel lid and the inner lid,
Forming a slimy storage chamber surrounded by a removable annular seal between the container lid and the inner lid,
1. A pressure regulating device for a rice cooker, characterized in that a steam discharge passageway with a pressure regulating valve is formed, which communicates the inside of the inner pot with the outside of the vessel through a holding member or a mounting portion thereof. (2) The pressure regulating device for a rice cooker according to claim 1, wherein the soot reservoir forming portion of the inner lid is formed in a downward concave portion. (3) The pressure regulating device for a rice cooker according to claim 1, wherein the annular seal portion is formed by press-contacting an annular seal packing attached to the back surface of the lid to the top surface of the inner lid. (4) The pressure regulating device for a rice cooker according to claim 3, wherein at least a portion of the back surface of the lid surrounded by the annular seal packing is formed of a metal plate. (5) The pressure regulating device for a rice cooker according to claim 4, wherein the metal plate is attached with a lid heater provided inside the container lid. (6) The pressure regulating device for a rice cooker according to claim 1, wherein the steam release passage is formed so that the steam in the inner pot is released through the steam collecting chamber. (7) The pressure regulating device for a rice cooker according to claim 1, wherein the steam release passage is formed so that the steam in the inner pot first passes through the steam storage chamber and is released. (8) The pressure regulating device for a rice cooker according to claim 7, wherein the inner lid has a plurality of through holes formed in the soot reservoir forming portion. (9) The pressure regulating valve is a normally closed valve installed in the steam release passage so that it is pushed open when the pressure inside the inner pot exceeds the set pressure, and is a utility model in which a part of the valve is exposed outside the vessel. A pressure regulating device for a rice cooker according to any one of registered claims 1 to 8.