JP5294971B2 - Pressure cooker - Google Patents

Pressure cooker Download PDF

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JP5294971B2
JP5294971B2 JP2009116296A JP2009116296A JP5294971B2 JP 5294971 B2 JP5294971 B2 JP 5294971B2 JP 2009116296 A JP2009116296 A JP 2009116296A JP 2009116296 A JP2009116296 A JP 2009116296A JP 5294971 B2 JP5294971 B2 JP 5294971B2
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valve
pressure
rice cooker
safety valve
pan
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JP2010263986A (en
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直樹 杉本
正美 福本
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure rice cooker with high safety preventing the jetting of steam and boiling water from between a cooker body and a lid body even if an abnormal pressure is applied to the interior of the pot during cooking. <P>SOLUTION: This rice cooker includes: a cooker body 2 which has the pot 4 where rice is inserted, a storage case 14 where the pot 4 is stored, a heating means 5 for heating the pot 4, and a control section for controlling the cooking; a lid body 3 openably/closably mounted to the cooker body 2; a pressure valve 18 which is provided inside the lid body 3 and adjusts the pressure in the interior of the pot 4; a safety device; and a storage section 32 for storing gruel-like thick rice water; wherein the safety device formed from a safety valve 33 and a protection valve 34 and, when the pressure in the interior of the pot 4 reaches a set value of the safety valve 33, the safety valve 33 is operated to depressurize the interior of the pot. Alternatively, when the safety valve 33 is non-operated to cause the pressure to increase to a set value of the protection valve 34, an operation section 41 of the protection valve 34 is operated to depress a valve rod 44 and depressurize the interior of the pot 4. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は圧力式炊飯器に関し、炊飯中に昇圧された鍋内で異常圧力が発生した炊飯異常時において、異常圧力状態を解除することができる圧力式炊飯器に関するものである。   The present invention relates to a pressure-type rice cooker, and more particularly to a pressure-type rice cooker that can release an abnormal pressure state when an abnormal pressure occurs in a pan that has been pressurized during rice cooking.

最近では炊飯中に鍋内を通常の圧力よりも昇圧する炊飯器が増加しており、そのような炊飯器を圧力式炊飯器と呼んでいる。圧力式炊飯器は、炊飯時に蓋の周囲に設けられたパッキンと鍋の縁とで鍋内を密閉し、密閉した状態で鍋を加熱すると同時に鍋内を昇圧するため、被炊飯物に大気圧以上の圧力がかかるとともに鍋内が高温になるものになっている。そして、昇圧した鍋内の圧力を下げるために、蓋に蒸気口を設け、鍋内の蒸気を外方へ抜くような構成になっている。   Recently, rice cookers that increase the pressure inside the pan during cooking rice are increasing, and such rice cookers are called pressure rice cookers. The pressure rice cooker seals the inside of the pan with the packing provided around the lid and the edge of the pan when cooking rice, heats the pan in a sealed state and simultaneously pressurizes the pan, The above pressure is applied and the inside of the pan becomes hot. And in order to reduce the pressure in the pressure-rised pan, the lid is provided with a steam port so that the steam in the pan is drawn outward.

しかし、蒸気口に豆の皮などの被炊飯物が詰まり、蒸気口を塞いでしまうと、鍋内の蒸気が外方へ抜けずに、鍋内の圧力が上昇してしまう危険があった。そこで、蒸気口が塞がれても一定以上に圧力が上がらないように蓋に安全弁を設けた構造が開発されている。   However, if the steam mouth is clogged with food to be cooked such as bean crust and the steam mouth is blocked, the steam in the pan does not escape outward and there is a risk that the pressure in the pan will rise. Therefore, a structure has been developed in which a safety valve is provided on the lid so that the pressure does not rise above a certain level even if the steam port is blocked.

ところが、蒸気口と同様に安全弁も塞がれてしまうと、圧力が異常上昇しても蒸気を外方へ抜く手段がなくなり、鍋内の圧力によって蓋が持ち上げられ、鍋の縁と蓋とを密着させているパッキンと鍋の間から鍋内の蒸気及び熱湯が勢いよく飛び出す恐れがあった。蒸気や熱湯の噴出は、炊飯器の周囲を汚し、また使用者が火傷をする危険を招く恐れもあった。   However, if the safety valve is closed as well as the steam port, there will be no means to draw steam outward even if the pressure rises abnormally, and the lid is lifted by the pressure in the pan, and the edge of the pan and the lid are removed. There was a risk that steam and hot water in the pan might jump out from between the packing and pan that were in close contact. The eruption of steam or hot water contaminated the area of the rice cooker and could cause the user to burn.

下記特許文献1に開示されている炊飯器は、図6に示すように、大気開放安全弁を複数個設けたものである。炊飯器本体101は、上方に開放される釜収容部110を形成し、その内部に電磁誘導コイルなどの加熱手段によって加熱される釜102を収容する。炊飯器本体101の内部に収容した釜102の上端開口部102aは、炊飯器本体101の背部において、軸111によって軸支され、前端部を蓋フック112で炊飯器本体101に係止させる蓋体103、具体的には蓋体103の底面に装着した内蓋104によって閉塞する。すなわち、放熱板として機能する内蓋104の外周に装着した、内蓋パッキン108を釜102の上端開口部102aに密接させることにより、シール状態を実現する。   As shown in FIG. 6, the rice cooker disclosed in the following Patent Document 1 is provided with a plurality of safety valves that are open to the atmosphere. The rice cooker main body 101 forms a pot accommodating portion 110 opened upward, and accommodates the pot 102 heated by heating means such as an electromagnetic induction coil. The upper end opening 102a of the pot 102 accommodated inside the rice cooker main body 101 is pivotally supported by the shaft 111 at the back of the rice cooker main body 101, and the front end is locked to the rice cooker main body 101 by the lid hook 112. 103, specifically, an inner lid 104 attached to the bottom surface of the lid 103. That is, the sealed state is realized by bringing the inner lid packing 108 attached to the outer periphery of the inner lid 104 functioning as a heat radiating plate into close contact with the upper end opening 102 a of the shuttle 102.

蓋体103には、圧力調整手段を配置し、この圧力調整手段によって、釜102内の圧力が一定圧力を超えたときに、釜102内の蒸気を蒸気通路106に逃がし、高圧状態で炊飯の調理を行うことができる。圧力調整手段とは別に、蓋体103には二つの大気開放安全弁構造A、Bを配置する。二つの大気開放安全弁構造A、Bのうち大気開放安全弁構造Aは、圧力調整手段を駆動させる、鍋内の圧力を検出するセンサー119構造を利用している。   The lid 103 is provided with pressure adjusting means. When the pressure in the pot 102 exceeds a certain pressure, the pressure in the pot 102 allows the steam in the pot 102 to escape to the steam passage 106 and cook rice in a high pressure state. Cooking can be done. Separately from the pressure adjusting means, the cover body 103 is provided with two air-release safety valve structures A and B. Of the two open-air safety valve structures A and B, open-air safety valve structure A uses a sensor 119 structure that drives the pressure adjusting means and detects the pressure in the pan.

大気開放安全弁構造Bは、内蓋104に穿設した貫通孔105’に装着する密栓120として大気開放安全弁構造を構成する。すなわち、貫通孔105’に装着した密栓120は、ゴムなどの弾性体で成型し、釜102内の圧力が設定圧力以上に昇圧したときに抜栓される密栓とする。密栓120を装着する貫通孔105’は、栓体との密接圧力を確保するために立ち上がり壁121を形成するとともに、密栓120を収容する空間を確保するために加熱板114に貫通孔125を穿設し、加熱板114よりも上方に位置する蓋体103の、合成樹脂製の底板122に短筒123を垂設させ、短筒123の開口端に装着する環状のパッキン124を貫通孔125の外方に密接させることによって、蒸気通路106の一部に密栓120の抜栓空間126を確保している。   The atmosphere release safety valve structure B constitutes the atmosphere release safety valve structure as the sealing plug 120 attached to the through hole 105 ′ formed in the inner lid 104. That is, the sealing plug 120 attached to the through-hole 105 ′ is formed of an elastic material such as rubber, and is a sealing plug that is unplugged when the pressure in the hook 102 is increased to a set pressure or higher. The through-hole 105 ′ in which the sealing plug 120 is mounted forms a rising wall 121 in order to ensure a close pressure with the plug body, and the heating plate 114 has a through-hole 125 in order to secure a space for accommodating the sealing plug 120. The short cylinder 123 is suspended from the synthetic resin bottom plate 122 of the lid 103 positioned above the heating plate 114, and an annular packing 124 attached to the open end of the short cylinder 123 is inserted into the through hole 125. A close-out space 126 of the seal plug 120 is secured in a part of the steam passage 106 by being in close contact with the outside.

特開2007−236404号公報JP 2007-236404 A

しかし、上記特許文献1の炊飯器では、大気開放安全弁の目的で配置される密栓120は、加熱板114に穿設した貫通孔105'を密栓120の先端部分で密閉するが、一旦作動すると自動的に復帰しないことと、複数個設けられているため、鍋内を昇圧することが困難となる恐れがあった。すなわち、鍋内を昇圧するためには鍋内が密閉されていなければならないが、大気開放安全弁が一旦作動すると自動的に復帰しないし、複数個設けられているため、1箇所でも密閉されていないと、鍋内を密閉することができないので、鍋内を昇圧するのが困難となる恐れがあった。   However, in the rice cooker of the above-mentioned patent document 1, the sealing plug 120 arranged for the purpose of an air release safety valve seals the through-hole 105 ′ drilled in the heating plate 114 at the tip portion of the sealing plug 120. There is a risk that it may be difficult to pressurize the inside of the pan because it does not return automatically and a plurality of the pans are provided. That is, in order to pressurize the inside of the pan, the inside of the pan must be sealed, but once the atmosphere release safety valve is activated, it does not automatically return, and since there are a plurality of them, it is not sealed even at one place. Since the inside of the pan could not be sealed, there was a risk that it would be difficult to pressurize the inside of the pan.

本発明者は、前記問題点を解決すべく種々検討を行った結果、安全弁を二重構造でかつ強制的な作動、復帰が可能に構成することにより、安全弁の設置場所が1箇所であっても、炊飯異常時において、確実に鍋内の異常圧力を解消することができる炊飯器として、本発明を完成するに至ったものである。   As a result of various studies to solve the above problems, the present inventor has configured the safety valve to have a dual structure and capable of forcible operation and return, so that the installation location of the safety valve is one. However, the present invention has been completed as a rice cooker that can reliably eliminate the abnormal pressure in the pan when rice cooking is abnormal.

前記問題を解決するために、本願の請求項1に係る発明は、被炊飯物が投入される鍋と、該鍋が収納される収納ケースと、前記鍋を加熱する加熱手段と、炊飯を制御する制御部とを有する炊飯器本体と、該炊飯器本体に開閉自在に装着された蓋体と、該蓋体内に設けられ、前記鍋内の圧力を調節する圧力弁とを備えた炊飯器において、前記蓋体には、前記鍋内の圧力を大気圧に開放する安全弁と該安全弁内に可動部を有する保護弁とが設けられ、該保護弁は前記可動部を動作させる作動部を前記安全弁外に有することを特徴とする。   In order to solve the above-mentioned problem, the invention according to claim 1 of the present application controls a pot in which a rice to be cooked is charged, a storage case in which the pot is stored, a heating means for heating the pot, and rice cooking. In a rice cooker comprising a rice cooker body having a control unit, a lid attached to the rice cooker body so as to be freely opened and closed, and a pressure valve provided in the lid for adjusting the pressure in the pan. The lid is provided with a safety valve for releasing the pressure in the pan to atmospheric pressure and a protective valve having a movable part in the safety valve, and the protective valve has an operating part for operating the movable part as the safety valve. It is characterized by having outside.

本願の請求項2に係る発明は、請求項1に記載の圧力式炊飯器において、前記安全弁の作動する設定圧力より、前記保護弁の作動する設定圧力の方が高く設定されていることを特徴とする。   The invention according to claim 2 of the present application is characterized in that, in the pressure rice cooker according to claim 1, the set pressure at which the protection valve operates is set higher than the set pressure at which the safety valve operates. And

本願の請求項3に係る発明は、請求項1に記載の圧力式炊飯器において、前記保護弁は、前記安全弁作動時には連動し、前記安全弁が不作動でかつ前記保護弁の設定圧力に達したときには独立して動作するように設定されたことを特徴とする。   The invention according to claim 3 of the present application is the pressure rice cooker according to claim 1, wherein the protection valve is interlocked when the safety valve is activated, the safety valve is inoperative, and reaches a set pressure of the protection valve. Sometimes it is set to operate independently.

本願の請求項4に係る発明は、請求項1又は3に記載の圧力式炊飯器において、前記保護弁は、前記可動部が前記安全弁の筒状弁内に設けた貫通孔を挿通して設けられたことを特徴とする。   The invention according to claim 4 of the present application is the pressure rice cooker according to claim 1 or 3, wherein the protective valve is provided by inserting a through hole provided in the cylindrical valve of the safety valve by the movable part. It is characterized by that.

本願の請求項5に係る発明は、請求項1に記載の圧力式炊飯器において、前記保護弁は、前記作動部がソレノイドにより構成されることを特徴とする。   The invention according to claim 5 of the present application is characterized in that, in the pressure rice cooker according to claim 1, the protection valve is configured such that the operating portion is constituted by a solenoid.

本願の請求項6に係る発明は、請求項1〜5のいずれかに記載の圧力式炊飯器において、前記保護弁は、前記安全弁の筒状弁内に設けた貫通孔を挿通し下端に該貫通孔を閉塞するつばを備えた弁棒、該弁棒を上方に付勢する手段及び前記作動部との係合部を有する前記可動部と、前記係合部に作動力を加える前記作動部とからなることを特徴とする。   The invention according to claim 6 of the present application is the pressure rice cooker according to any one of claims 1 to 5, wherein the protective valve is inserted through a through-hole provided in the cylindrical valve of the safety valve, and A valve rod having a collar for closing the through hole, a means for urging the valve rod upward, the movable portion having an engagement portion with the operation portion, and the operation portion for applying an operation force to the engagement portion It is characterized by the following.

本願の請求項7に係る発明は、請求項6に記載の圧力式炊飯器において、前記筒状弁を内蓋方向に付勢する安全弁スプリングの力が前記保護弁の前記弁棒を上方に付勢する手段の力よりも強くなるように設定したことを特徴とする。   The invention according to claim 7 of the present application is the pressure rice cooker according to claim 6, wherein the force of the safety valve spring that urges the cylindrical valve in the direction of the inner lid attaches the valve rod of the protective valve upward. It is characterized in that it is set so as to be stronger than the force of the supporting means.

本発明によれば、圧力式炊飯器の圧力弁が詰まり、鍋内が異常圧力になったときに作動する安全装置として、蓋体には、鍋内の圧力を大気圧に開放する安全弁と安全弁内に可動部を有する保護弁とが設けられ、保護弁は可動部を動作させる作動部を安全弁外に備えることによって、鍋内の圧力が安全弁の設定値になると安全弁が動作し鍋内の圧力を抜くが、安全弁が動作せずより圧力が上がり保護弁の設定値に達すると、保護弁の作動部を動作させて鍋内の圧力を抜くことができるので、炊飯異常時において鍋内に異常な圧力がかかっても炊飯器本体と蓋体との間から蒸気及び熱湯を突出させないようにすることができる、したがって、使用者に安全な圧力式炊飯器を提供することができる。   According to the present invention, as a safety device that operates when the pressure valve of the pressure rice cooker is clogged and the inside of the pan becomes abnormal pressure, the lid has a safety valve and a safety valve that release the pressure in the pan to atmospheric pressure. A protective valve having a movable part is provided inside, and the protective valve is provided with an operating part for operating the movable part outside the safety valve, so that when the pressure in the pan reaches the set value of the safety valve, the safety valve operates and the pressure in the pan However, if the safety valve does not operate and the pressure rises and reaches the set value of the protection valve, the operation of the protection valve can be operated to release the pressure in the pan. It is possible to prevent steam and hot water from protruding between the rice cooker main body and the lid body even when a large pressure is applied, and therefore it is possible to provide a safe pressure rice cooker for the user.

図1は、本発明に係る圧力式炊飯器の正面図である。FIG. 1 is a front view of a pressure rice cooker according to the present invention. 図2は、図1の圧力式炊飯器の要部縦断面図である。FIG. 2 is a longitudinal sectional view of a main part of the pressure rice cooker of FIG. 図3は、図2のP部分の拡大図であり、通常の炊飯時における安全弁と保護弁を表す図である。FIG. 3 is an enlarged view of a portion P in FIG. 2, and is a diagram illustrating a safety valve and a protection valve during normal rice cooking. 図4は、図2のP部分の拡大図であり、安全弁が作動している状態を表す図である。FIG. 4 is an enlarged view of a portion P in FIG. 2 and shows a state where the safety valve is operating. 図5は、図2のP部分の拡大図であり、保護弁が作動している状態を表す図である。FIG. 5 is an enlarged view of a portion P in FIG. 2 and shows a state in which the protective valve is operating. 図6は、従来の圧力式炊飯器の縦断面図であり、一部を拡大して安全弁構造を示す図である。FIG. 6 is a longitudinal cross-sectional view of a conventional pressure rice cooker, and is a view showing a safety valve structure by enlarging a part thereof.

以下、図面を参照して、本発明の実施形態を説明する。ただし、以下に示す実施形態は、本発明の技術的思想を具体化するための圧力炊飯器を例示するものであって、本発明をこの圧力炊飯器に特定することを意図するものではなく、特許請求の範囲に含まれるその他の実施形態のものにも等しく適用し得るものである。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a pressure rice cooker for embodying the technical idea of the present invention, and is not intended to specify the present invention for this pressure rice cooker, It is equally applicable to other embodiments within the scope of the claims.

まず、図1及び図2を参照して本発明の実施例に係る圧力式炊飯器について説明する。図1は、本発明の実施例に係る圧力式炊飯器の正面図である。図2は、本発明の実施例に係る圧力式炊飯器の要部断面図であり、左が正面である。   First, a pressure rice cooker according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view of a pressure rice cooker according to an embodiment of the present invention. FIG. 2: is principal part sectional drawing of the pressure type rice cooker which concerns on the Example of this invention, The left is a front.

図において、1は圧力式炊飯器で、炊飯器本体(以下「本体」という)2と、本体2を覆う開閉自在の蓋体3とで構成される。本体2には、被炊飯物が投入される深底の容器からなる鍋4と、上方にこの鍋4が着脱自在に収容される開口部及び内部にこの鍋4を加熱して被炊飯物を加熱する加熱手段5を有しており、炊飯を制御する制御部(図示省略)と、炊飯メニューを選定するために操作する操作部6と、選定された炊飯メニューを表示する表示部7が正面側に設けてある。   In the figure, reference numeral 1 denotes a pressure rice cooker, which is composed of a rice cooker main body (hereinafter referred to as “main body”) 2 and an openable / closable lid 3 covering the main body 2. The main body 2 has a pan 4 made of a deep-bottomed container into which the rice to be cooked is placed, an opening in which the pan 4 is detachably accommodated, and the pot 4 being heated to heat the cooked rice. It has a heating means 5 for heating, and a control unit (not shown) for controlling rice cooking, an operation unit 6 for operating to select a rice cooking menu, and a display unit 7 for displaying the selected rice cooking menu are in front. It is provided on the side.

操作部6は、炊飯メニュー選択ボタン8、炊飯スタート/保温ボタン9、予約ボタン10、取り消しボタン11、十字キー12よりなり、これらの操作ボタンを操作して、使用者の好みのメニューで炊飯を行うように設定することができる。   The operation unit 6 includes a rice cooking menu selection button 8, a rice cooking start / heat keeping button 9, a reservation button 10, a cancel button 11, and a cross key 12, and operates these operation buttons to cook rice in a menu desired by the user. Can be set to do.

本体2は、有底箱状の外部ケース13と、この外部ケース13に収容される収納ケース14とからなり、外部ケース13と収納ケース14との間に隙間が形成され、この隙間に制御部(制御手段)を構成する制御装置(図示省略)が配設されている。収納ケース14には鍋4が収容され、この鍋4は、例えばアルミニウムとステンレスとのクラッド材で形成されている。また、この収納ケース14には、加熱手段5が鍋4に対向するようにして設けられる。   The main body 2 includes a bottomed box-shaped outer case 13 and a storage case 14 accommodated in the outer case 13, and a gap is formed between the outer case 13 and the storage case 14, and a control unit is formed in the gap. A control device (not shown) constituting (control means) is provided. The storage case 14 accommodates the pan 4, and the pan 4 is made of, for example, a clad material of aluminum and stainless steel. The storage case 14 is provided with the heating means 5 so as to face the pan 4.

蓋体3は、一側をヒンジにより本体2に枢着した着脱自在の内蓋15と、外方を覆う外蓋16で構成されており、線ヒータよりなる蓋ヒータ17を備えている。また、蓋体3には、圧力弁18、圧力弁開放機構19、負圧弁(図示省略)、安全装置20、蒸気通路21と、蒸気通路21の圧力弁18よりも噴出口22側の位置に設けた温度センサである蒸気温度センサ23が備えられている。   The lid 3 includes a detachable inner lid 15 that is pivotally attached to the main body 2 by a hinge on one side, and an outer lid 16 that covers the outer side, and includes a lid heater 17 made of a line heater. Further, the lid 3 has a pressure valve 18, a pressure valve opening mechanism 19, a negative pressure valve (not shown), a safety device 20, a steam passage 21, and a position closer to the jet port 22 than the pressure valve 18 of the steam passage 21. A steam temperature sensor 23 which is a provided temperature sensor is provided.

圧力弁18は、金属製の調圧ボール24と、台座25、圧力弁カバー26からなり、圧力弁開放機構19は、調圧ボール24を強制的に移動させるソレノイドからなり、電磁コイルが巻回されたシリンダ27と、このシリンダ27内を電磁コイルの励磁により移動させるプランジャ28で構成されている。   The pressure valve 18 includes a metal pressure adjusting ball 24, a pedestal 25, and a pressure valve cover 26. The pressure valve opening mechanism 19 includes a solenoid that forcibly moves the pressure adjusting ball 24, and an electromagnetic coil is wound thereon. And a plunger 28 that moves in the cylinder 27 by excitation of an electromagnetic coil.

台座25は中心に孔29が開けられており、鍋4内の加圧時は調圧ボール24が自重により台座25の真ん中に収まり、孔29を塞いで安定するように設計されている。調圧ボール24が孔29を塞いでいるときは、鍋4と内蓋15とは、内蓋15の周囲に取り付けられているパッキン30と調圧ボール24とで密閉されている。プランジャ28は、制御部により制御されて密閉状態を解除する際に調圧ボール24を台座25の孔29の上から押しのける。   A hole 29 is formed in the center of the pedestal 25, and the pressure adjusting ball 24 is designed to be placed in the middle of the pedestal 25 by its own weight when the pressure in the pan 4 is pressed, and is stabilized by closing the hole 29. When the pressure adjusting ball 24 closes the hole 29, the pot 4 and the inner lid 15 are sealed with the packing 30 and the pressure adjusting ball 24 attached around the inner lid 15. When the plunger 28 is controlled by the control unit to release the sealed state, the plunger 28 pushes the pressure adjusting ball 24 from above the hole 29 of the base 25.

圧力弁開放機構19は、制御装置により制御される。すなわち、制御装置からの指令に基づき、電磁コイルが励磁されるとプランジャ28がシリンダ27内に引き込まれ、この引き込みにより調圧ボール24が自重により台座25上に戻り、孔29が調圧ボール24で閉塞される。また、電磁コイルへの励磁がストップされると、プランジャ28がバネの付勢力によりシリンダ27から飛出して、調圧ボール24を所定方向に押し出す。この押し出しにより、調圧ボール24は、台座25上で移動し孔29を強制的に開放させる。   The pressure valve opening mechanism 19 is controlled by a control device. That is, when the electromagnetic coil is excited based on a command from the control device, the plunger 28 is drawn into the cylinder 27, and by this drawing, the pressure adjusting ball 24 returns to the base 25 by its own weight, and the hole 29 is adjusted to the pressure adjusting ball 24. Is blocked. When the excitation of the electromagnetic coil is stopped, the plunger 28 jumps out of the cylinder 27 by the biasing force of the spring and pushes the pressure adjusting ball 24 in a predetermined direction. By this extrusion, the pressure adjusting ball 24 moves on the pedestal 25 and forcibly opens the hole 29.

また、調圧ボール24は鍋4内の圧力が1.2気圧に維持されるような重さを有している。   Further, the pressure adjusting ball 24 has such a weight that the pressure in the pot 4 is maintained at 1.2 atm.

31はおねばタンクで、蓋体3の上方に着脱自在に設けられ、炊飯時に発生するおねばを貯留する。そのため、おねばタンク31の内部は、蒸気とおねばとを分離させるために多層構造となっており、おねばのみが貯留部32に溜められ、噴出口22からは蒸気のみがでるようになっている。   31 is a rice bowl, which is detachably provided above the lid 3 and stores rice balls generated during rice cooking. Therefore, the inside of the rice tank 31 has a multi-layer structure for separating the steam from the rice bowl, and only the rice cake is stored in the storage portion 32, and only the steam is emitted from the ejection port 22. Yes.

20は安全装置で、安全弁33と保護弁34で構成される。安全装置20は、例えば炊飯中に圧力弁18が故障して開かず、鍋4内が異常圧力になったときなどに作動するもので、調圧ボール24の作動する設定圧力(1.2気圧)と、パッキン30がはじけて、本体2と蓋体3との間から熱湯や蒸気が吐出される圧力(1.35気圧以上)との間の圧力で作動するようにしてある。   A safety device 20 includes a safety valve 33 and a protection valve 34. The safety device 20 is activated, for example, when the pressure valve 18 fails during rice cooking and does not open, and the inside of the pan 4 becomes abnormal pressure. The set pressure (1.2 atm) at which the pressure adjusting ball 24 operates. ) And the packing 30 is repelled, and is operated at a pressure between the pressure between the main body 2 and the lid 3 so that hot water or steam is discharged (1.35 atm or more).

安全弁33は、内蓋15に設けられた弁孔35と、その弁孔35を覆うように配設され上部に孔の開いた安全弁カバー36と、安全弁カバー36内に保持され弁孔35を開閉可能に塞ぐ筒状弁38と、筒状弁38の下面に設けられた安全弁パッキン39と、安全弁カバー36内に収納され筒状弁38を上方から常時弁孔35を閉塞するように付勢する安全弁スプリング37とにより構成されている。筒状弁38は、貫通孔を有する桿体の下部につばを備え、安全弁パッキン39は、そのつばの下面に桿体の延長部を囲んで取り付けられる。桿体の下端は後述する保護弁34の弁棒44の下部によって開閉可能に閉塞されている。   The safety valve 33 includes a valve hole 35 provided in the inner lid 15, a safety valve cover 36 that is provided so as to cover the valve hole 35 and has a hole in an upper portion thereof, and is held in the safety valve cover 36 to open and close the valve hole 35. A cylindrical valve 38 that can be closed, a safety valve packing 39 provided on the lower surface of the cylindrical valve 38, and a cylindrical valve 38 that is housed in the safety valve cover 36 is urged so as to always close the valve hole 35 from above. A safety valve spring 37 is used. The tubular valve 38 includes a collar at the lower part of the casing having a through hole, and the safety valve packing 39 is attached to the lower surface of the collar so as to surround the extension portion of the casing. The lower end of the housing is closed so as to be openable and closable by a lower portion of a valve rod 44 of a protective valve 34 described later.

炊飯異常時には、鍋4内圧力により安全弁スプリング37が圧縮されて安全弁33が作動すると、安全弁カバー36の上部の孔から蒸気が蒸気通路21に放出される。   When cooking rice is abnormal, when the safety valve spring 37 is compressed by the pressure in the pan 4 and the safety valve 33 is activated, steam is discharged from the upper hole of the safety valve cover 36 into the steam passage 21.

保護弁34は、可動部40と作動部であるソレノイド41により構成され、可動部40は、筒状弁38の中心に貫設された桿孔42に挿通し、安全弁カバー36上に設けられた保護弁スプリング43により常時桿孔42を下方から閉塞するように上方に付勢した弁棒44と、弁棒44下部に設けられた保護弁パッキン45によって構成されている。弁棒44下部は桿孔42を塞ぐようにつば状の支持片44aが設けられ、支持片44aに桿孔42を塞ぐ保護弁パッキン45が取り付けられている。   The protection valve 34 is composed of a movable portion 40 and a solenoid 41 as an operating portion. The movable portion 40 is inserted into a hole 42 penetrating through the center of the cylindrical valve 38 and provided on the safety valve cover 36. The protection valve spring 43 is configured by a valve rod 44 that is urged upward so as to always close the well 42 from below, and a protection valve packing 45 provided below the valve rod 44. A collar-like support piece 44a is provided at the lower part of the valve stem 44 so as to close the fist hole 42, and a protective valve packing 45 for closing the fist hole 42 is attached to the support piece 44a.

弁棒44を押下するソレノイド41は、電磁コイルが巻回されたシリンダと、電磁コイルの励磁により移動し、弁棒44上端と係合して弁棒44を押下するプランジャと、プランジャに配設された作動棹46により構成され、弁棒44上端を横方向からの運動で押下するため、作動棹46はテーパー面46aを有している。   A solenoid 41 that presses down the valve stem 44 includes a cylinder around which an electromagnetic coil is wound, a plunger that moves by excitation of the electromagnetic coil, engages with the upper end of the valve stem 44, and presses down the valve stem 44, and is disposed on the plunger. The actuating rod 46 has a tapered surface 46a in order to push down the upper end of the valve stem 44 by a lateral movement.

安全弁33の筒状弁38を内蓋15方向へ付勢する安全弁スプリング37と、弁棒44を上方向へ付勢する保護弁スプリング43とでは、筒状弁38を内蓋15方向へ付勢する安全弁スプリング37の方が強くなるように設定されている。   The safety valve spring 37 that biases the cylindrical valve 38 of the safety valve 33 toward the inner lid 15 and the protective valve spring 43 that biases the valve rod 44 upwardly bias the cylindrical valve 38 toward the inner lid 15. The safety valve spring 37 is set to be stronger.

通常の炊飯時には、圧力弁18が調圧ボール24の作用により鍋4内の圧力をコントロールしているため、安全装置20は図3のように、シリコンにより形成された安全弁パッキン39と保護弁パッキン45とによって、鍋4内を密封している。   During normal rice cooking, since the pressure valve 18 controls the pressure in the pan 4 by the action of the pressure adjusting ball 24, the safety device 20 has a safety valve packing 39 made of silicon and a protective valve packing as shown in FIG. 45 and the inside of the pan 4 is sealed.

ところが、圧力弁18に豆の皮などの被炊飯物が詰まってしまい、作用しなくなると、鍋4内の圧力が異常上昇してしまう。そのとき鍋4内の圧力が安全弁の設定圧力(例えば1.25気圧)になると、図4に示す通り、安全弁パッキン39を内蓋15に押圧している安全弁スプリング37の力に抗して筒状弁38と安全弁パッキン39が押し上げられるため、鍋4内の蒸気は弁孔35を通り内蓋15と安全弁パッキン39との間から図4矢印で示すように蒸気通路21へと抜けて外方へ放出される。   However, if the pressure valve 18 is clogged with food to be cooked such as bean crust and does not work, the pressure in the pan 4 will rise abnormally. At that time, when the pressure in the pan 4 becomes the set pressure (for example, 1.25 atm) of the safety valve, the cylinder is resisted against the force of the safety valve spring 37 pressing the safety valve packing 39 against the inner lid 15 as shown in FIG. Since the valve 38 and the safety valve packing 39 are pushed up, the steam in the pan 4 passes through the valve hole 35 and from between the inner lid 15 and the safety valve packing 39 to the steam passage 21 as shown by the arrows in FIG. Is released.

さらに、圧力弁18に加えて安全弁33にも豆の皮などの被炊飯物が詰まってしまった場合、さらに鍋4内の圧力が異常上昇してしまう。すると、図5に示す通り、圧力センサ(図示省略)で保護弁の設定圧力(例えば、1.32気圧)を検出すると、制御装置(図示省略)がソレノイド41を動作させることにより、プランジャが押し出され、作動棹46のテーパー46aが弁棒44の上端に当接し、弁棒44が保護弁スプリング43の力に抗して鍋4方向に押下される。弁棒44の押下によって、筒状弁38と保護弁パッキン45との密封が解除され、図5矢印で示すように、筒状弁38と弁棒44の間の隙間から蒸気通路21に蒸気が抜けて外方へ放出される。   Furthermore, in addition to the pressure valve 18, when the to-be-cooked foods, such as a bean skin, are clogged also in the safety valve 33, the pressure in the pan 4 will further rise abnormally. Then, as shown in FIG. 5, when the pressure sensor (not shown) detects the set pressure (eg, 1.32 atm) of the protective valve, the control device (not shown) operates the solenoid 41 to push out the plunger. Accordingly, the taper 46 a of the operating rod 46 abuts on the upper end of the valve rod 44, and the valve rod 44 is pushed in the direction of the pan 4 against the force of the protective valve spring 43. By depressing the valve stem 44, the sealing between the tubular valve 38 and the protective valve packing 45 is released, and steam is introduced into the steam passage 21 from the gap between the tubular valve 38 and the valve stem 44 as shown by the arrows in FIG. It escapes and is discharged outward.

また、安全弁33と共に保護弁34にも豆の皮などの被炊飯物が詰まってしまった場合においても、弁棒44をソレノイド41で強制的に、例えば5mm押下することで隙間ができるため、鍋4内の蒸気が外方へ抜ける。   Even when the cooker such as bean crust is clogged in the protective valve 34 together with the safety valve 33, a gap is created by forcibly pressing the valve stem 44 with the solenoid 41, for example, 5 mm. The steam in 4 escapes outward.

上記実施例では、弁棒44を強制的に作動させるソレノイド41を、横方向から弁棒44に係合する例を示したけれども、場合により、ソレノイド41は縦方向から弁棒に作用するようにしてもよい。直接連結するなど、係合する方法としては種々の方法が用いられる。   In the above embodiment, the solenoid 41 for forcibly operating the valve stem 44 is shown as engaging with the valve stem 44 from the lateral direction. However, in some cases, the solenoid 41 may act on the valve stem from the vertical direction. May be. Various methods are used as a method of engaging, such as connecting directly.

また、上記実施例では、鍋4内の圧力を検出する方法として圧力センサを用いたが、それに限定されるものではなく、炊飯中における排出蒸気温度を検出して沸騰温度よりも所定温度低い場合に異常が発生したとする方法を用いるなど、種々の方法が用いられる。   Moreover, in the said Example, although the pressure sensor was used as a method of detecting the pressure in the pan 4, it is not limited to it, When the discharge steam temperature in rice cooking is detected and predetermined temperature is lower than a boiling temperature Various methods are used, such as using a method in which an abnormality has occurred.

また、安全弁33と保護弁34を作動する基準となる気圧をそれぞれ1.25気圧、1.32気圧としたが、作動する基準はこの数値に限定されるものではない。   Moreover, although the reference | standard atmospheric pressure which act | operates the safety valve 33 and the protection valve 34 was set to 1.25 atmospheres and 1.32 atmospheres, respectively, the reference | standard which act | operates is not limited to this numerical value.

以上述べたように、本発明は安全弁を保護弁との二重構造でかつ保護弁を制御装置による強制的な作動、復帰が可能に構成したことにより、安全弁の設置場所が1箇所であっても、圧力式炊飯器の炊飯異常時において、確実に鍋内の異常圧力を解消することができる。   As described above, according to the present invention, the safety valve has a double structure with the protection valve, and the protection valve can be forcibly operated and reset by the control device. Moreover, the abnormal pressure in a pan can be reliably eliminated at the time of the rice cooking abnormality of a pressure type rice cooker.

1:圧力式炊飯器
2:炊飯器本体(本体)
3:蓋体
4:鍋
5:加熱手段
15:内蓋
16:外蓋
33:安全弁
34:保護弁
35:弁孔
36:安全弁カバー
37:安全弁スプリング
38:筒状弁
39:安全弁パッキン
40:可動部
41:ソレノイド(作動部)
42:桿孔
43:保護弁スプリング
44:弁棒
44a:支持片
45:保護弁パッキン
46:作動棹
1: Pressure rice cooker 2: Rice cooker body (main body)
3: Lid 4: Pan 5: Heating means 15: Inner lid 16: Outer lid 33: Safety valve 34: Protection valve 35: Valve hole 36: Safety valve cover 37: Safety valve spring 38: Tubular valve 39: Safety valve packing 40: Movable Part 41: Solenoid (actuating part)
42: Hole 43: Protection valve spring 44: Valve rod 44a: Support piece 45: Protection valve packing 46: Actuation rod

Claims (7)

被炊飯物が投入される鍋と、該鍋が収納される収納ケースと、前記鍋を加熱する加熱手段と、炊飯を制御する制御部とを有する炊飯器本体と、該炊飯器本体に開閉自在に装着された蓋体と、該蓋体内に設けられ、前記鍋内の圧力を調節する圧力弁とを備えた炊飯器において、
前記蓋体には、前記鍋内の圧力を大気圧に開放する安全弁と該安全弁内に可動部を有する保護弁とが設けられ、該保護弁は前記可動部を動作させるよう該可動部に関連付けられた作動部を前記安全弁外に備えたことを特徴とする圧力式炊飯器。
A rice cooker main body having a pan into which the rice to be cooked is charged, a storage case in which the pan is stored, a heating means for heating the pan, and a controller for controlling rice cooking, and the rice cooker main body can be freely opened and closed. A rice cooker provided with a lid attached to the lid, and a pressure valve provided in the lid for adjusting the pressure in the pan,
The lid is provided with a safety valve for releasing the pressure in the pan to atmospheric pressure and a protective valve having a movable part in the safety valve, and the protective valve is associated with the movable part so as to operate the movable part. A pressure-type rice cooker characterized in that the actuating part provided outside the safety valve.
前記安全弁の作動する設定圧力より、前記保護弁の作動する設定圧力の方が高く設定されていることを特徴とする請求項1に記載の圧力式炊飯器。   The pressure type rice cooker according to claim 1, wherein a set pressure at which the protection valve operates is set higher than a set pressure at which the safety valve operates. 前記保護弁は、前記安全弁作動時には前記安全弁と連動し、前記安全弁が不作動でかつ前記保護弁の設定圧力に達したときには独立して動作するように設定されたことを特徴とする請求項1に記載の圧力式炊飯器。   2. The protection valve is set to operate in conjunction with the safety valve when the safety valve is operated, and to operate independently when the safety valve is inactive and reaches a set pressure of the protection valve. The pressure-type rice cooker as described in. 前記保護弁は、前記可動部が前記安全弁の筒状弁内に設けた貫通孔を挿通して設けられたことを特徴とする請求項1又は3に記載の圧力式炊飯器。   The pressure-type rice cooker according to claim 1 or 3, wherein the protection valve is provided with the movable portion inserted through a through-hole provided in a cylindrical valve of the safety valve. 前記保護弁は、前記作動部がソレノイドにより構成されることを特徴とする請求項1に記載の圧力式炊飯器。   The pressure type rice cooker according to claim 1, wherein the protection valve is configured such that the operating portion is configured by a solenoid. 前記保護弁は、前記安全弁の筒状弁内に設けた貫通孔を挿通し下端に該貫通孔を閉塞するつばを備えた弁棒、該弁棒を上方に付勢する付勢手段及び前記作動部との係合部を有する前記可動部と、前記係合部に作動力を加える前記作動部とからなることを特徴とする請求項1〜5のいずれかに記載の圧力式炊飯器。   The protective valve includes a valve rod having a collar inserted through a through hole provided in a cylindrical valve of the safety valve and closing the through hole at a lower end, an urging means for urging the valve rod upward, and the operation The pressure rice cooker according to any one of claims 1 to 5, comprising the movable part having an engaging part with the part and the actuating part that applies an actuating force to the engaging part. 前記筒状弁を内蓋方向に付勢する安全弁スプリングの力が前記保護弁の前記弁棒を上方に付勢する前記付勢手段の力よりも強くなるように設定したことを特徴とする請求項6に記載の圧力式炊飯器。   The force of the safety valve spring that biases the cylindrical valve in the direction of the inner lid is set to be stronger than the force of the biasing means that biases the valve rod of the protection valve upward. Item 7. A pressure rice cooker according to item 6.
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JPS6024247Y2 (en) * 1981-03-17 1985-07-19 象印マホービン株式会社 Pressure cooker pressure regulator
JPS60106529U (en) * 1983-12-23 1985-07-20 理研軽金属工業株式会社 Pressure cooker pressure regulator
JP3230979B2 (en) * 1996-01-17 2001-11-19 象印マホービン株式会社 rice cooker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104970694A (en) * 2015-07-07 2015-10-14 珠海格力电器股份有限公司 Pressure cooker

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